JP2007212447A - Lens drive unit for laser radar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make acceleration sensitivity superior in a lens drive unit for a laser radar. <P>SOLUTION: This lens drive unit 1 for the laser radar for detecting a laser beam returned reflected from a target, by irradiating the target with the laser beam, to measure the distance up to the target, is provided with a lens 5 having the laser beam transmitted therethrough; magnets 11A, 11B, 12A, 12B/21A, 21B, 22A, 22B for making the lens 5 operable; and a coil 30/40 for generating electromagnetic force by a current flowing, corresponding to a magnetic field formed with the magnets 11A, 11B, 12A, 12B/21A, 21B, 22A, 22B, so as to make the lens 5 operable, one pair or more of the coils 30/40 are arranged with the lens 5 therebetween, and the magnets 11A, 11B, 12A, 12B/21A, 21B, 22A, 22B are arranged, corresponding to one of the coils 30/40. As a result, the lens drive unit 1 for the laser radar is thereby constituted, that is superior in the motion of the lens 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lens driving device for a laser radar that is mounted on, for example, an automobile and equipped in a laser radar that measures the distance to a target.

  The laser radar is configured to measure, for example, an azimuth and a distance with respect to a target by oscillating laser light and detecting the laser light. Examples of conventional techniques related to laser radar include a preceding vehicle detection device that uses a scanning laser radar to detect a preceding vehicle ahead of the host vehicle and a control method thereof (see, for example, Patent Document 1). .)

  Further, as a conventional art relating to an actuator for driving a lens driving device, a so-called lens, for example, an optical space transmission device capable of high-speed response of driving in two orthogonal directions of an optical axis correction lens (For example, refer to Patent Document 2).

The laser radar includes a lens that transmits laser light and a lens driving device that includes an electromagnetic coil that drives the lens vertically and horizontally (none of which is shown). The lens of the laser radar lens driving device is driven along the vertical direction or the horizontal direction by an electromagnetic coil or the like. The electromagnetic coil of a conventional laser radar lens driving device is configured as a substantially cylindrical coil, a so-called voice coil shape.
Japanese Patent Laying-Open No. 2005-181114 (page 3, FIGS. 1 to 10) JP 7-123054 A (pages 1, 3 and 1 to 11)

  However, since the conventional laser radar lens driving device is a voice coil type lens driving device, a closed magnetic field is generated for each coil by a yoke or a magnet located substantially in the center of the lens driving device. For example, it was composed of two places. The magnetic flux density vector of the coil portion in the closed magnetic field was not aligned in the linear direction. Therefore, in the conventional laser radar lens driving device, the generation of electromagnetic force is considered to be small. A lens driving device that generates little electromagnetic force has low acceleration sensitivity. For this reason, the sensitivity of the laser radar provided with the lens driving device that generates little electromagnetic force is low. In recent years, a high acceleration sensitivity is required for a lens driving device for a laser radar equipped with a lens.

  In addition, there is a demand for miniaturization and weight reduction of the laser radar lens driving device, and to keep the price of the laser radar lens driving device low.

  The present invention is to solve the above-described problems. An object of the present invention is to provide a lens driver for laser radar having excellent acceleration sensitivity in view of the above points.

In order to achieve the above object, a laser radar lens driving device according to claim 1 of the present invention detects a laser beam which is irradiated with a laser beam and reflected back from the target to detect the target. In a laser radar lens driving apparatus for measuring a distance to an object, an electromagnetic force is generated by passing a current corresponding to a magnetic field generated by the lens through which the laser beam is transmitted, a magnet that allows the lens to be operated. And a coil that enables the lens to be operated, and a pair of the coils are arranged with the lens interposed therebetween, and the magnet is arranged corresponding to one of the coils.

  With the above configuration, a lens driving device for a laser radar with good lens movement is configured. The laser radar is intended to measure the distance to the target by irradiating the target with laser light, detecting the laser light reflected and returned from the target. By arranging a magnet corresponding to one coil, when a current is passed through the coil in the magnetic field generated by the magnet, the coil is easily moved by the electromagnetic force generated in the coil. Since the coil can be easily moved, the movement of the lens operated by the magnet and the coil is also good. Since the lens through which the laser beam is transmitted is easily moved, it is possible to provide a laser radar lens driving device having excellent acceleration sensitivity.

  The laser radar lens driving device according to claim 2 is the laser radar lens driving device according to claim 1, wherein the coil is configured as an annular flat plate coil, and the magnet is disposed on one surface side of the annular flat plate coil. Is arranged.

  With the above configuration, a lens driving device for a laser radar with good lens movement is configured. By arranging the magnet on one side of the annular flat plate coil, when a current is passed through the coil in the magnetic field created by the magnet, the coil is easily moved with respect to the magnet by the electromagnetic force generated in the coil.

  A laser radar lens driving device according to claim 3 is the laser radar lens driving device according to claim 1 or 2, wherein a plurality of the magnets are arranged for one of the coils, and the magnet includes a positive electrode portion. And a negative electrode portion that is a pole portion opposite to the positive electrode portion, and the plurality of magnets include a counter-coil positive-side magnet in which the positive electrode portion is directed to the coil, and the negative electrode to the coil A negative electrode side magnet with a portion directed, the coil being configured as an annular flat plate coil, having a first surface and a second surface opposite to the first surface The counter-coil positive-side magnet with the positive electrode portion facing the annular flat-plate coil is disposed on the first surface side of the annular flat-plate coil, and corresponding to the counter-coil positive-side magnet, The second surface side of the annular flat coil The negative coil side magnet with the negative electrode portion facing the annular flat plate coil is disposed, and the annular flat plate coil is located between the positive coil side magnet and the negative coil side magnet. It is characterized by doing.

  With the above configuration, a lens driving device for laser radar with better lens movement is configured. The line of magnetic force between the counter-coil positive side magnet and the counter-coil negative side magnet is a line of magnetic force applied from the positive part of the counter-coil positive side magnet to the negative part of the counter-coil negative side magnet. A strong magnetic field is generated between the positive coil side magnet and the negative coil side magnet. In the magnetic field between the counter-coil positive side magnet and the counter-coil negative side magnet, the annular flat plate type coil is positioned, and an electric current is caused to flow through the annular flat plate type coil. An annular plate coil is moved.

The lens driving device for a laser radar according to claim 4 is the lens driving device for a laser radar according to claim 3, wherein the plurality of magnets are a first in which the positive electrode portion is directed to the annular flat plate coil. A counter-coil positive side magnet and a second counter-coil positive side magnet, and a first counter-coil negative side magnet and a second counter-coil negative side magnet in which the negative electrode portion is directed to the annular flat plate coil, The annular flat plate coil has a first side where current flows along one direction and a second side where current flows along the other direction opposite to the one direction, On the first surface side of the annular flat plate coil, the first counter-coil positive magnet with the positive electrode portion directed to the annular flat coil is disposed, and the first counter-coil positive magnet Correspondingly On the second surface side of the annular flat plate coil, the first counter-coil negative magnet with the negative electrode portion facing the annular flat coil is disposed, and the first counter-coil positive magnet and The first side of the annular flat plate coil is positioned between the first counter coil negative magnet and adjacent to the first counter coil negative magnet, On the second surface side, the second counter-coil positive-side magnet with the positive electrode portion facing the annular flat-plate coil is disposed, and the annular flat plate corresponding to the second counter-coil positive-side magnet The second counter-coil negative-side magnet with the negative-electrode portion directed to the annular flat-plate coil is disposed adjacent to the first counter-coil positive-side magnet on the first surface side of the mold coil. The second pair coil positive magnet and the second pair coil Between the negative magnet, said second side portion of the annular flat coil is characterized in that position.

  With the above configuration, a lens driving device for a laser radar having a better lens movement is configured. The magnetic field lines between the first counter-coil positive side magnet and the first counter-coil negative side magnet were applied from the positive part of the first counter-coil positive side magnet to the negative part of the first counter-coil negative side magnet. It becomes a substantially straight line of magnetic force. The first side of the annular flat plate coil is located in the magnetic field between the first counter-coil positive side magnet and the first counter-coil negative side magnet, and a current is passed through the first side of the annular flat plate coil. Is caused to flow along one direction, an electromagnetic force is generated at the first side of the annular flat plate coil, and the annular flat plate coil is moved. In addition, the magnetic field lines between the second counter-coil positive side magnet and the second counter-coil negative side magnet are from the positive part of the second counter-coil positive side magnet to the negative part of the second counter-coil negative side magnet. It becomes a substantially straight line of magnetic force applied to. The second side of the annular flat plate coil is located in the magnetic field between the second positive coil side magnet and the second negative coil side magnet, and the second side of the annular flat plate coil has a current. Is caused to flow along the other direction, an electromagnetic force is generated at the second side portion of the annular flat plate coil, and the annular flat plate coil is moved. At this time, the direction of the electromagnetic force generated at the first side portion of the annular flat plate coil coincides with the direction of the electromagnetic force generated at the second side portion of the annular flat plate coil. Therefore, the driving direction of the first side portion of the annular flat plate coil located in the magnetic field between the first counter-coil positive magnet and the first counter-coil negative magnet, and the second counter-coil positive magnet And the driving direction of the second side portion of the annular flat plate coil located in the magnetic field between the second negative coil side magnet and the second counter-coil negative magnet. When an electric current is passed through the annular flat plate coil, the annular flat plate coil is smoothly moved.

  The laser radar lens driving device according to claim 5 is the laser radar lens driving device according to claim 3 or 4, wherein the counter-coil positive side magnet and the counter-coil negative side magnet are formed in the same shape. It is characterized by that.

  With the above configuration, the price of the laser radar lens driving device can be kept low. By forming the counter-coil positive side magnet and the counter-coil negative side magnet in the same shape, a mass production effect is exhibited, and the price of the counter-coil positive side magnet and the counter-coil negative side magnet can be reduced. Therefore, it is possible to reduce the price of the laser radar lens driving device including the counter-coil positive side magnet and the counter-coil negative side magnet.

  A laser radar lens driving device according to a sixth aspect of the present invention is the laser radar lens driving device according to any one of the first to fifth aspects, wherein the coil is substantially annular when viewed in plan. The magnet is configured such that when a current is passed through the coil, the direction of electromagnetic force acting on a pair of long sides constituting the substantially annular substantially rectangular coil is the same direction. It is characterized by the arrangement of the poles.

  With the above configuration, the coil constituting the laser radar lens driving device is easily driven. When an electric current is passed through the coil, electromagnetic force along the same direction acts on the pair of long sides constituting the substantially annular coil, and the coil is easily moved along one direction. . Therefore, a lens driving device for laser radar having excellent acceleration sensitivity is configured.

  A laser radar lens driving device according to a seventh aspect of the present invention is the laser radar lens driving device according to any one of the first to sixth aspects, wherein the laser radar lens driving device is substantially orthogonal to the optical axis of the laser beam transmitted through the lens. The direction is defined as a first axial direction, and the pair of or more coils are a pair of or more first axial driving coils that move the lens along the first axial direction, and the magnet is the first axial direction. A first axial driving magnet corresponding to the axial driving coil is provided.

  With the above-described configuration, the lens of the laser radar lens driving device is accurately moved along the first axis direction by the coil and the magnet constituting the laser radar lens driving device. When a current is passed through the pair of first axial driving coils, the lens of the laser radar lens driving device is moved quickly and accurately along the first axial direction.

  The laser radar lens driving device according to claim 8 is the laser radar lens driving device according to any one of claims 1 to 7, which is substantially orthogonal to an optical axis of the laser light transmitted through the lens. A direction is defined as a first axis direction, a direction substantially orthogonal to the optical axis, and a direction substantially orthogonal to the first axis direction is defined as a second axis direction. A pair of first axial driving coils for moving the lens along the first axial direction and a pair of second axial driving coils for moving the lens along the second axial direction, The magnets are a first axial driving magnet corresponding to the pair of first axial driving coils and a second axial driving magnet corresponding to the pair of the second axial driving coils. It is characterized by.

  With the above-described configuration, the lens of the laser radar lens driving device is accurately aligned along the first axial direction by the pair of first axial driving coils and the first axial driving magnet that constitute the laser radar lens driving device. Moved well. When a current is passed through the pair of first axial driving coils, the lens of the laser radar lens driving device is moved quickly and accurately along the first axial direction. The lens of the laser radar lens driving device is moved along the second axial direction with high accuracy by the pair of second axial driving coils and the second axial driving magnet that constitute the laser radar lens driving device. It is. When a current is passed through the pair of second axial driving coils, the lens of the laser radar lens driving device is moved quickly and accurately along the second axial direction. The lens of the laser radar lens driving apparatus is freely driven along the first axis direction or the second axis direction.

  A laser radar lens driving device according to claim 9 is the laser radar lens driving device according to claim 8, wherein the pair of second axial driving coils moves the lens along the second axial direction. Instead, a pair of other first axial driving coils that move the lens along the first axial direction is used, and the second axial direction corresponding to the pair of second axial driving coils. Instead of the driving magnet, another first axial driving magnet corresponding to the pair of other first axial driving coils is used.

  With the above configuration, the lens of the laser radar lens driving device is easily and reliably moved only along the first axis direction by the coils and magnets constituting the laser radar lens driving device. By passing a current through the pair of first axial driving coils and the pair of other first axial driving coils, the lens of the laser radar lens driving device can be easily along only the first axial direction. Is quickly and reliably moved.

  A lens driving device for a laser radar according to claim 10, further comprising a lens holder equipped with the coil and the lens in the lens driving device for laser radar according to any one of claims 1 to 9, The lens holder is positioned within the effective magnetic field of the magnet, and the coil is positioned within the effective magnetic field of the magnet.

  With the above configuration, when a current is passed through the coil, the lens and the lens holder equipped with the coil are reliably driven. When a current is passed through the coil located in the effective magnetic field of the magnet, an electromagnetic force is generated in the coil and the coil moves. Therefore, the lens holder equipped with the coil and the lens is reliably driven by the electromagnetic force generated in the coil.

  The laser radar lens driving device according to claim 11 is the laser radar lens driving device according to any one of claims 1 to 10, wherein the coil is attached to a lens holder equipped with the lens, The lens holder is provided with a coil mounting portion corresponding to the coil.

  With the above configuration, the coil is easily attached to the coil mounting portion provided in the lens holder. Since the mounting operation of the coil to the coil mounting portion of the lens holder is easily performed, the assembling operation of the laser radar lens driving device is speeded up, and the assembling cost of the laser radar lens driving device can be kept low. Therefore, the price of the laser radar lens driving device can be easily suppressed to a low price.

  The laser radar lens driving device according to claim 12 is the laser radar lens driving device according to claim 11, wherein the coil mounting portion is recessed in the lens holder, and the coil is fitted to the coil mounting portion. It is characterized by that.

  With the above configuration, the coil can be easily and quickly fitted into the coil mounting portion that is recessed in the lens holder. Since the mounting operation of the coil with respect to the coil mounting portion of the lens holder is easily and quickly performed, the assembly operation of the laser radar lens driving device is efficiently performed, and the assembly cost of the laser radar lens driving device can be kept low. Therefore, the price of the laser radar lens driving device can be reduced.

  The laser radar lens driving device according to claim 13 is the laser radar lens driving device according to any one of claims 10 to 12, wherein the lens holder is formed in a substantially flat plate shape, and the coil is The lens holder is adhered to one surface side.

  With the above configuration, the manufacturability of the laser radar lens driving device is improved. Since the coil is bonded to one surface side of the lens holder formed in a substantially flat plate shape, the operation of bonding the coil to the lens holder is easily performed. Therefore, the bonding cost of the laser radar lens driving device can be kept low. Along with this, the price of the laser radar lens driving device is likely to be kept low.

  A laser radar lens driving device according to a fourteenth aspect of the present invention is the laser radar lens driving device according to any one of the tenth to thirteenth aspects, wherein a coil that is pre-configured by winding a conductor is used as the coil. It is used.

  With the above configuration, the coil is easily attached to the lens holder. By using a coil formed by winding a conductor in advance, it is easy to mount the coil on the lens holder. Since the mounting operation of the coil with respect to the lens holder is facilitated, the assembly operation of the lens driving device for laser radar is easily performed. By assembling the laser radar lens driving device easily, the price of the laser radar lens driving device can be reduced.

The lens driving device for a laser radar according to claim 15 is the lens driving device for a laser radar according to any one of claims 10 to 13, wherein the coil is formed by plating a conductor on a substrate. Is used.

  With the above configuration, the coil is easily attached to the lens holder. By using a coil formed by plating a conductor on the substrate, the coil can be easily attached to the lens holder. Since the mounting operation of the coil with respect to the lens holder is facilitated, the assembly operation of the lens driving device for laser radar is easily performed. By assembling the laser radar lens driving device easily, the price of the laser radar lens driving device can be reduced.

  A laser radar lens driving device according to claim 16 is the laser radar lens driving device according to any one of claims 10 to 15, wherein a lightening portion for reducing the weight of the lens holder is provided in the lens holder. It is provided.

  With the above configuration, the lens holder including the lens has good movement. By providing the lightening portion on the lens holder, the weight of the lens holder can be reduced. By using the lens holder reduced in weight, the operation of the lens holder becomes faster when the lens holder including the lens is moved. Therefore, a lens driving device for laser radar having excellent acceleration sensitivity is configured.

  The laser radar lens driving device according to claim 17 is the laser radar lens driving device according to any one of claims 10 to 16, further comprising a suspension portion that elastically supports the lens holder, The coil is connected to be energized.

  With the above configuration, a laser radar lens driving device with excellent acceleration sensitivity is configured. Since the lens holder including the coil and the lens is elastically supported by the suspension unit, the lens holder is quickly moved when a current is passed through the coil. Further, when a current is passed through the coil, electricity is supplied to the coil via the suspension unit. Since the coil and the suspension portion are connected so as to be energized, a special energizing member for supplying electricity to the coil is not necessary. Therefore, the number of parts of the laser radar lens driving device can be reduced. By reducing the number of parts of the laser radar lens driving device, the price of the laser radar lens driving device can be reduced.

  A lens driving device for a laser radar according to claim 18, in the lens driving device for laser radar according to claim 17, comprising: a substrate to which the suspension portion is connected so as to be energized; and a housing to which the substrate is mounted. And the lens, the coil, and the magnet are positioned in the housing.

  With the above-described configuration, the lens of the laser radar lens driving device is reliably moved by the coil and magnet in the casing without being interfered with those outside the casing. A lens including a coil and a lens, wherein the substrate and the suspension unit are connected to be energized, the suspension unit and the coil are connected to be energized, and current is passed from the substrate to the coil via the suspension unit. The holder is moved.

  The laser radar lens driving device according to claim 19 is the laser radar lens driving device according to any one of claims 1 to 18, wherein the magnet is mounted on a yoke surrounding the magnet. And

With the above configuration, the influence of the magnetic force generated from the magnet is easily exerted on the coil corresponding to the magnet. The yoke means, for example, one that structurally supports magnetic coupling. The yoke is supposed to reduce leakage of magnetic force generated from the magnet. When the magnet is mounted on the yoke and the magnet is surrounded by the yoke, the magnetic force generated from the magnet is easily directed to the coil. Since most of the magnetic force generated from the magnet is directed to the coil, when a current is passed through the coil and an electromagnetic force is generated in the coil, the coil is moved by receiving a large driving force. Therefore, a lens driver for laser radar having excellent acceleration sensitivity is constructed.

  As described above, according to the first aspect of the present invention, it is possible to configure a lens driving device for laser radar with good lens movement. By arranging a magnet corresponding to one coil, when a current is passed through the coil in the magnetic field generated by the magnet, the coil is easily moved by the electromagnetic force generated in the coil. Since the coil can be easily moved, the movement of the lens operated by the magnet and the coil is also good. Since the lens through which the laser light passes can be easily moved, a lens driver for laser radar having excellent acceleration sensitivity can be provided.

  According to the second aspect of the present invention, it is possible to configure a lens driving device for laser radar with good lens movement. By arranging the magnet on one side of the annular flat plate coil, when a current is passed through the coil in the magnetic field created by the magnet, the coil is easily moved with respect to the magnet by the electromagnetic force generated in the coil.

  According to the third aspect of the present invention, it is possible to configure a lens driving device for a laser radar with better lens movement. The line of magnetic force between the counter-coil positive side magnet and the counter-coil negative side magnet is a line of magnetic force applied from the positive part of the counter-coil positive side magnet to the negative part of the counter-coil negative side magnet. A strong magnetic field is generated between the positive coil side magnet and the negative coil side magnet. In the magnetic field between the counter-coil positive side magnet and the counter-coil negative side magnet, the annular flat plate type coil is positioned, and an electric current is caused to flow through the annular flat plate type coil. An annular plate coil is moved.

  According to the fourth aspect of the present invention, it is possible to configure a lens driving device for a laser radar having a further good lens movement. The magnetic field lines between the first counter-coil positive side magnet and the first counter-coil negative side magnet were applied from the positive part of the first counter-coil positive side magnet to the negative part of the first counter-coil negative side magnet. It becomes a substantially straight line of magnetic force. The first side of the annular flat plate coil is located in the magnetic field between the first counter-coil positive side magnet and the first counter-coil negative side magnet, and a current is passed through the first side of the annular flat plate coil. Is caused to flow along one direction, an electromagnetic force is generated at the first side of the annular flat plate coil, and the annular flat plate coil is moved. In addition, the magnetic field lines between the second counter-coil positive side magnet and the second counter-coil negative side magnet are from the positive part of the second counter-coil positive side magnet to the negative part of the second counter-coil negative side magnet. It becomes a substantially straight line of magnetic force applied to. The second side of the annular flat plate coil is located in the magnetic field between the second positive coil side magnet and the second negative coil side magnet, and the second side of the annular flat plate coil has a current. Is caused to flow along the other direction, an electromagnetic force is generated at the second side portion of the annular flat plate coil, and the annular flat plate coil is moved. At this time, the direction of the electromagnetic force generated at the first side portion of the annular flat plate coil coincides with the direction of the electromagnetic force generated at the second side portion of the annular flat plate coil. Therefore, the driving direction of the first side portion of the annular flat plate coil located in the magnetic field between the first counter-coil positive magnet and the first counter-coil negative magnet, and the second counter-coil positive magnet And the driving direction of the second side portion of the annular flat plate coil located in the magnetic field between the second negative coil side magnet and the second counter-coil negative magnet. When an electric current is passed through the annular flat plate coil, the annular flat plate coil is smoothly moved.

According to the fifth aspect of the invention, the price of the laser radar lens driving device can be kept low. By forming the counter-coil positive side magnet and the counter-coil negative side magnet in the same shape, a mass production effect is exhibited, and the price of the counter-coil positive side magnet and the counter-coil negative side magnet can be reduced. Therefore, it is possible to reduce the price of the laser radar lens driving apparatus including the counter-coil positive side magnet and the counter-coil negative side magnet.

  According to the sixth aspect of the present invention, it is possible to easily drive the coil constituting the laser radar lens driving device. When an electric current is passed through the coil, electromagnetic force along the same direction acts on the pair of long sides constituting the substantially annular coil, and the coil is easily moved along one direction. . Therefore, a laser radar lens driving device having excellent acceleration sensitivity can be configured.

  According to the seventh aspect of the present invention, the lens of the laser radar lens driving device can be accurately moved along the first axis direction by the coil and the magnet constituting the laser radar lens driving device. When a current is passed through the pair of first axial driving coils, the lens of the laser radar lens driving device is moved quickly and accurately along the first axial direction.

  According to the eighth aspect of the present invention, the lens of the laser radar lens driving device is first formed by the pair of first axial driving coils and the first axial driving magnet that constitute the laser radar lens driving device. It can be moved with high accuracy along the axial direction. When a current is passed through the pair of first axial driving coils, the lens of the laser radar lens driving device is moved quickly and accurately along the first axial direction. The pair of second axial driving coils and the second axial driving magnet constituting the laser radar lens driving device can move the lens of the laser radar lens driving device with high accuracy along the second axial direction. Can do. When a current is passed through the pair of second axial driving coils, the lens of the laser radar lens driving device is moved quickly and accurately along the second axial direction. The lens of the laser radar lens driving apparatus is freely driven along the first axis direction or the second axis direction.

  According to the ninth aspect of the present invention, the coil of the laser radar lens driving device and the magnet can easily and reliably move the lens of the laser radar lens driving device along only the first axis direction. . By passing a current through the pair of first axial driving coils and the pair of other first axial driving coils, the lens of the laser radar lens driving device can be easily along only the first axial direction. Is quickly and reliably moved.

  According to the tenth aspect of the present invention, when a current is passed through the coil, the lens and the lens holder equipped with the coil can be reliably driven. When a current is passed through the coil located in the effective magnetic field of the magnet, an electromagnetic force is generated in the coil and the coil moves. Therefore, the lens holder equipped with the coil and the lens can be reliably driven by the electromagnetic force generated in the coil.

  According to invention of Claim 11, a coil can be easily attached to the coil mounting part provided in the lens holder. Since the mounting operation of the coil to the coil mounting portion of the lens holder is easily performed, the assembling operation of the laser radar lens driving device is speeded up, and the assembling cost of the laser radar lens driving device can be kept low. Therefore, the price of the laser radar lens driving device can be kept low.

According to the twelfth aspect of the present invention, the coil can be easily and quickly fitted into the coil mounting portion recessed in the lens holder. Since the mounting operation of the coil with respect to the coil mounting portion of the lens holder is easily and quickly performed, the assembly operation of the laser radar lens driving device is efficiently performed, and the assembly cost of the laser radar lens driving device can be kept low. Therefore, the price of the laser radar lens driving device can be reduced.

  According to the thirteenth aspect, the manufacturability of the laser radar lens driving device can be improved. Since the coil is bonded to one surface side of the lens holder formed in a substantially flat plate shape, the operation of bonding the coil to the lens holder is easily performed. Therefore, the bonding cost of the laser radar lens driving device can be kept low. Accordingly, the price of the laser radar lens driving device can be kept low.

  According to the fourteenth aspect of the present invention, the coil can be easily attached to the lens holder. By using a coil formed by winding a conductor in advance, it is easy to mount the coil on the lens holder. Since the mounting operation of the coil to the lens holder is facilitated, the assembly operation of the laser radar lens driving device is easily performed. By assembling the laser radar lens driving device easily, the price of the laser radar lens driving device can be reduced.

  According to the fifteenth aspect of the present invention, the coil can be easily attached to the lens holder. By using a coil formed by plating a conductor on the substrate, the coil can be easily attached to the lens holder. Since the mounting operation of the coil to the lens holder is facilitated, the assembly operation of the laser radar lens driving device is easily performed. By assembling the laser radar lens driving device easily, the price of the laser radar lens driving device can be reduced.

  According to invention of Claim 16, a lens holder provided with a lens can be made into a thing with good motion. By providing the lightening portion on the lens holder, the weight of the lens holder can be reduced. By using the lens holder reduced in weight, the operation of the lens holder becomes faster when the lens holder including the lens is moved. Therefore, a laser radar lens driving device having excellent acceleration sensitivity can be configured.

  According to the seventeenth aspect of the present invention, it is possible to configure a laser radar lens driving device with excellent acceleration sensitivity. Since the lens holder including the coil and the lens is elastically supported by the suspension unit, the lens holder is quickly moved when a current is passed through the coil. Further, when a current is passed through the coil, electricity is supplied to the coil via the suspension unit. Since the coil and the suspension portion are connected so as to be energized, a special energizing member for supplying electricity to the coil is not necessary. Therefore, the number of parts of the laser radar lens driving device can be reduced. By reducing the number of parts of the laser radar lens driving device, the price of the laser radar lens driving device can be reduced.

  According to the eighteenth aspect of the present invention, the lens of the laser radar lens driving device can be reliably moved by the coil and the magnet in the casing without being interfered by a thing outside the casing. A lens including a coil and a lens, wherein the substrate and the suspension unit are connected to be energized, the suspension unit and the coil are connected to be energized, and current is passed from the substrate to the coil via the suspension unit. The holder is moved.

According to the nineteenth aspect of the present invention, the influence of the magnetic force generated from the magnet is exerted on the coil corresponding to the magnet. When the magnet is mounted on the yoke and the magnet is surrounded by the yoke, the magnetic force generated from the magnet is easily directed to the coil. Since most of the magnetic force generated from the magnet is directed to the coil, when a current is passed through the coil and an electromagnetic force is generated in the coil, the coil is moved by receiving a large driving force. Therefore, a laser radar lens driving device having excellent acceleration sensitivity can be configured.

  An embodiment of a lens driving device for a laser radar according to the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a state in which the laser radar lens driving device according to an embodiment of the present invention is partially cut away, FIG. 2 is a perspective view showing the laser radar lens driving device, and FIG. FIG. 4 is a side view of the laser radar lens driving device, FIG. 5 is a rear view of the laser radar lens driving device, and FIG. 6 is a laser radar lens driving device. FIG. 7 is a perspective view showing a coil of a laser radar lens driving device, and FIG. 8 is a plan view showing a coil of the laser radar lens driving device.

  1 and 2, the side on which the lens 5 is located is the front side of the laser radar lens driving device 1. 7 and 8 show the distribution of electromagnetic force generated in each of the coils 30 and 40. FIG. 7 and 8, effective electromagnetic force vectors in the coils 30 and 40 are indicated by using substantially linear small arrows.

  Further, as described above, the laser radar is configured to measure, for example, an azimuth and a distance with respect to an object or a target (not shown) by oscillating laser light and detecting the laser light. ing. Specifically, the laser radar changes the emission angle of the laser beam to either one or both of the vertical direction and the horizontal direction, and irradiates the target (not shown) with the laser beam, The laser beam reflected and returned from the target is detected, and the distance to the target is measured by the time difference at that time. The laser radar is a radar that uses laser light. For example, it receives a laser beam reflected by reflectors attached to the rear left and right of the front vehicle, measures the time at that time, and measures the distance and direction with respect to the front vehicle. It is supposed to detect. In addition, it is assumed that the shape of the road is inferred from the arrangement of reflectors installed on the road shoulder. This laser radar lens driving device 1 is mounted and used in an automobile (not shown).

  The laser radar scanning lens driving device 1 (FIGS. 1 to 5) includes one scanning lens 5 through which a laser beam (not shown) emitted from a light emitting element (not shown) passes, and one scanning lens 5. The drive unit 10 is configured to operate along each direction such as the left-right direction D1 and the up-down direction D2.

  From the scanning lens 5, only the parallel laser light is emitted. Parallel light means light that travels in parallel without any rays spreading. On the other hand, the diffused light means light from a light source that diffuses and irradiates light in various directions. The reflected light bounced off the target is returned to the lens 5, for example. The laser radar scanning lens driving device 1 has a light projecting function and a light receiving function. The lens 5 is formed by using a substantially colorless and transparent synthetic resin material or a substantially colorless and transparent glass material that is excellent in light transmittance.

  The scanning lens 5 made of glass or synthetic resin is mounted on a lens holder 50 made of synthetic resin via a lens adjustment support member 6 made of synthetic resin. The substantially cylindrical lens adjustment support member 6 provided with the substantially convex scanning lens 5 has a substantially round hole shape provided in a substantially central portion 50c (FIGS. 1 and 2) of a substantially rectangular plate-like lens holder 50. The lens mounting portion 55 is attached.

The drive unit 10 (FIGS. 1 to 5) of the laser radar scanning lens drive device 1 has a structure having magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B that generate magnetic forces. It is supposed to be. The magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B are provided in the laser radar scanning lens driving device 1 so that the scanning lens 5 can be freely operated. A magnetic material that always generates magnetic force was used as the magnet. Examples of the magnetic material include magnets and magnet steel. As the magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B, for example, two-pole magnetized magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B were used.

  The driving unit 10 of the laser radar scanning lens driving device 1 corresponds to a magnetic field generated by each of the magnets 11A, 11B, 12A, and 12B, and is a substantially circular flat plate-like coil that generates an electromagnetic force when a current flows. 30. Each coil 30 is provided in the laser radar scanning lens driving device 1 so that the scanning lens 5 can be freely operated. A substantially annular flat coil 30 is located in the magnetic field generated by each of the magnets 11A, 11B, 12A, and 12B, and an electric current is passed through the coil 30, whereby an electromagnetic force that moves the coil 30 is generated in the coil 30.

  The driving unit 10 of the laser radar scanning lens driving device 1 corresponds to a magnetic field generated by each of the magnets 21A, 21B, 22A, and 22B, and is a substantially circular flat plate-like coil that generates an electromagnetic force when a current flows. 40. Each coil 40 is provided in the laser radar scanning lens driving device 1 so that the scanning lens 5 can be freely operated. A substantially annular flat coil 40 is positioned in the magnetic field generated by each of the magnets 21A, 21B, 22A, 22B, and an electric current is passed through the coil 40, so that an electromagnetic force that moves the coil 40 is generated in the coil 40.

  A pair of or more substantially annular plate coils 30, 30, 40, 40 are arranged along directions D 1, D 2 that are substantially orthogonal to the optical axis direction D 0 of the laser light that passes through the scanning lens 5. More specifically, a pair of substantially annular flat-plate coils 30 and 30 are arranged along the left-right direction D1 with one scanning lens 5 as the center. In addition, a pair of substantially annular flat-plate coils 40, 40 are arranged along the vertical direction D2 with one scanning lens 5 as the center.

  The arrangement structure of the coils 30, 30, 40, 40 with respect to the scanning lens 5 will be described in detail. A plurality of pairs of substantially circular plate coils 30, 30, 40, 40 are symmetrical with respect to one scanning lens 5. It arrange | positions so that it may become (FIG. 7). As shown in FIG. 5, two types of coils 30 and 40 are arranged symmetrically with respect to one scanning lens 5. Around the scanning lens 5, four substantially annular plate coils 30, 30, 40, 40 are arranged.

  As shown in FIG. 1, a plurality of pairs of magnets 11 </ b> A, 11 </ b> B, 12 </ b> A, 12 </ b> B are arranged in the vicinity of the periphery of the coil 30 corresponding to one coil 30. Two pairs of magnets 11 </ b> A, 11 </ b> B, 12 </ b> A, and 12 </ b> B are disposed near the periphery of one coil 30. Further, a plurality of pairs of magnets 21 </ b> A, 21 </ b> B, 22 </ b> A, 22 </ b> B are arranged in the vicinity of the periphery of the coil 40 corresponding to one coil 40. Two pairs of magnets 21 </ b> A, 21 </ b> B, 22 </ b> A, and 22 </ b> B are disposed near the periphery of one coil 40.

  The lens driving device 1 including the driving unit 10 is configured as a so-called actuator. The actuator means, for example, a drive device that converts energy into translational motion or rotational motion. The angle of the laser beam transmitted through the scanning lens 5 is changed by the driving unit 10 of the scanning lens driving device 1. The lens driving device 1 is used to manipulate the optical axis angle of the laser light.

  If the drive unit 10 of the scanning lens driving device 1 for laser radar is configured in this way, the scanning lens driving device 1 for laser radar with good movement of the scanning lens 5 is configured.

  A plurality of pairs of substantially annular flat-plate coils 30, 30/40, 40 are arranged symmetrically with one scanning lens 5 interposed therebetween, and corresponding to each coil 30, 40, each magnet 11A, 11B. , 12A, 12B / 21A, 21B, 22A, 22B, the scanning lens 5 is moved in a well-balanced manner.

  When two pairs of magnets 11A, 11B, 12A, and 12B are arranged corresponding to one coil 30, current is passed through the coils 30 in the magnetic field created by the magnets 11A, 11B, 12A, and 12B. In addition, due to the electromagnetic force generated in the coil 30, one coil 30 is easily moved with respect to the magnets 11A, 11B, 12A, and 12B that generate magnetic force.

  Further, by arranging two pairs of magnets 21A, 21B, 22A, and 22B corresponding to one coil 40, a current is passed through the coil 40 in the magnetic field created by each of the magnets 21A, 21B, 22A, and 22B. Then, the electromagnetic force generated in the coil 40 makes it easy for the one coil 40 to be moved with respect to the magnets 21A, 21B, 22A, and 22B that generate magnetic force.

  Since the plurality of coils 30 and 40 are easily moved, the magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A and 22B and the scanning lens 5 operated by the coils 30 and 40 are also good in movement. . That is, since the plurality of pairs of coils 30, 30, 40, 40 constituting the drive unit 10 are easily moved, the movement of the scanning lens 5 operated by the drive unit 10 is also good. Since it becomes easy to move the scanning lens 5 through which the laser light is transmitted, it is possible to provide the scanning lens driving device 1 for laser radar having excellent acceleration sensitivity.

  The coil 30 (FIG. 7) is configured as an annular flat plate coil 30. On the side of the first surface portion 31 (FIGS. 3 and 7) of the annular flat coil 30, dipole magnets 11A and 12B having a substantially flat plate shape are arranged (FIGS. 1 to 3). By arranging the two-pole magnets 11 </ b> A and 12 </ b> B in this manner, the laser radar scanning lens driving device 1 with a good movement of the scanning lens 5 is configured. By arranging the substantially flat plate-like two-pole magnets 11A and 12B on the first surface portion 31 side of the annular flat-plate coil 30, a current is passed through the coil 30 in the magnetic field created by the two-pole magnets 11A and 12B. Sometimes, the electromagnetic force generated in the coil 30 makes it easier for the coil 30 to move relative to the two-pole magnets 11A and 12B.

  The coil 40 (FIGS. 7 and 8) is configured as an annular flat plate coil 40. On the first surface portion 41 (FIGS. 4 and 7) side of the annular flat plate coil 40, substantially flat two-pole magnets 21A and 22B are arranged (FIGS. 1, 2 and 4). By arranging the two-pole magnets 21 </ b> A and 22 </ b> B in this manner, the laser radar scanning lens driving device 1 with a good movement of the scanning lens 5 is configured. By arranging the substantially flat plate-like two-pole magnets 21A and 22B on the first surface portion 41 side of the annular flat-plate coil 40, a current is passed through the coil 40 in the magnetic field created by the two-pole magnets 21A and 22B. Sometimes, the electromagnetic force generated in the coil 40 makes it easier to move the coil 40 relative to the two-pole magnets 21A and 22B.

For example, depending on the design / specifications of the laser radar scanning lens driving device (1), the substantially flat plate-shaped dipole magnet (11A, 12B) on the first surface portion (31) side of the annular flat plate coil (30). Are arranged in a state in which a yoke (not shown) is close to each other, and a substantially flat plate-shaped dipole magnet (11B, 12A only on the second surface portion (32) side of the annular flat plate coil (30). ) May be arranged. “Yoke” means, for example, one that structurally supports magnetic coupling. Further, the “yoke” is supposed to reduce leakage of magnetic force generated from the magnet.

  By doing so, the laser radar scanning lens driving device (1) in which the number of parts of the scanning lens driving device (1) for laser radar is reduced and the movement of the scanning lens (5) is good is configured. Therefore, it is possible to provide a laser radar scanning lens driving device (1) whose price is kept low. Further, a yoke (not shown) is provided close to the first surface portion (31) side of the annular flat plate coil (30), and substantially on the second surface portion (32) side of the annular flat plate coil (30). When the plate-shaped dipole magnets (11B, 12A) are arranged, when a current is passed through the coil (30) in the magnetic field created by the dipole magnets (11B, 12A), the coil (30) Due to the generated electromagnetic force, the coil (30) is easily moved with respect to the dipole magnets (11B, 12A).

  Further, for example, depending on the design / specification of the scanning lens driving device for laser radar (1), the substantially flat plate-shaped two-pole magnet (21A, 21A, 21) is provided on the first surface portion (41) side of the annular flat plate coil (40). 22B) is provided with a yoke (not shown) close to each other, and a substantially flat plate-shaped dipole magnet (21B) only on the second surface portion (42) side of the annular flat plate coil (40). 22A) may be arranged.

  By doing so, the laser radar scanning lens driving device (1) in which the number of parts of the scanning lens driving device (1) for laser radar is reduced and the movement of the scanning lens (5) is good is configured. Therefore, it is possible to provide a laser radar scanning lens driving device (1) whose price is kept low. Further, a yoke (not shown) is provided close to the first surface portion (41) side of the annular flat plate coil (40), and substantially on the second surface portion (42) side of the annular flat plate coil (40). When the plate-shaped dipole magnets (21B, 22A) are arranged, when a current is passed through the coil (40) in the magnetic field created by the dipole magnets (21B, 22A), the coil (40) Due to the generated electromagnetic force, the coil (40) is easily moved with respect to the two-pole magnets (21B, 22A).

  The magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B include a substantially flat positive electrode portion 11c, 11e, 12c, 12e, 21c, 21e, 22c, and 22e and a positive electrode portion 11c, 11e, 12c, and 12e. , 21c, 21e, 22c, and 22e, which are opposite to the positive electrode portions 11c, 11e, 12c, 12e, 21c, 21e, 22c, and 22e, are substantially planar negative electrode portions 11d, 11f, 12d, 12f, and 21d. , 21f, 22d, and 22f (FIGS. 3 and 4).

  The positive electrode portions 11c, 11e, 12c, 12e, 21c, 21e, 22c, and 22e are designated as N-pole portions 11c, 11e, 12c, 12e, 21c, 21e, 22c, and 22e. Further, the negative electrode portions 11d, 11f, 12d, 12f, 21d, 21f, 22d, and 22f are formed as S pole portions 11d, 11f, 12d, 12f, 21d, 21f, 22d, and 22f.

  A plurality of magnets 11A, 11B, 12A, and 12B arranged in the vicinity of the periphery of the coil 30 (FIG. 1) include a counter-coil N-pole side magnet 11A in which the N-pole portion 11c faces the coil 30 as shown in FIG. The S pole portion magnet 11B with the S pole portion 11f facing the coil 30; the N pole side magnet 12A with the N pole portion 12c facing the coil 30; and the S pole portion with respect to the coil 30. The counter-coil S pole side magnet 12B is directed to 12f.

In addition, the plurality of magnets 21A, 21B, 22A, and 22B arranged in the vicinity of the periphery of the coil 40 (FIG. 1) includes a counter coil N in which the N pole portion 21c is directed to the coil 40 as shown in FIG.
The pole-side magnet 21A, the counter-coil S pole-side magnet 21B with the S-pole portion 21f directed to the coil 40, the counter-coil N-pole side magnet 22A with the N-pole portion 22c directed to the coil 40, and the coil 40 On the other hand, it is a counter-coil S pole side magnet 22B with the S pole portion 22f directed thereto.

  As shown in FIG. 7, the vertical coil 30 is configured as a substantially rectangular annular plate coil 30, and includes a first surface portion 31 and a second surface portion 32 that is a surface opposite to the first surface portion 31. It is supposed to have. Further, as shown in FIGS. 7 and 8, the horizontal coil 40 is configured as a substantially rectangular plate-shaped coil 40 having a first surface portion 41 and a surface opposite to the first surface portion 41. The second surface portion 42 is included.

  As shown in FIG. 3, a substantially flat type counter-coil N pole side magnet 11 </ b> A in which a substantially flat N pole portion 11 c is directed to the annular flat plate coil 30 on the first surface portion 31 side of the annular flat plate coil 30. Has been placed. Corresponding to the substantially planar counter-coil N pole side magnet 11 </ b> A, a substantially planar S pole portion 11 f is directed to the annular flat plate coil 30 on the second surface portion 32 side of the annular flat plate coil 30. A flat type counter-coil S pole side magnet 11B is arranged. The vertical annular flat plate coil 30 is positioned with a gap between the counter-coil N pole side magnet 11A and the counter coil S pole side magnet 11B.

  Further, on the second surface portion 32 side of the annular flat plate coil 30, a substantially flat type counter-coil N pole side magnet 12 </ b> A in which a substantially flat N pole portion 12 c is directed to the annular flat plate coil 30 is disposed. . Corresponding to the substantially planar counter-coil N pole side magnet 12A, a substantially planar S pole portion 12f is directed to the annular flat plate coil 30 on the first surface portion 31 side of the annular flat plate coil 30. A substantially flat type counter-coil S pole side magnet 12B is disposed. A vertical annular flat plate coil 30 is positioned with a gap between the counter-coil N pole side magnet 12A and the counter coil S pole side magnet 12B.

  Further, as shown in FIG. 4, a substantially flat type counter-coil N pole side magnet having a substantially flat N pole portion 21c facing the annular flat plate coil 40 on the first surface portion 41 side of the annular flat plate coil 40. 21A is arranged. Corresponding to the substantially planar counter-coil N pole side magnet 21 </ b> A, a substantially planar S pole portion 21 f is directed to the annular plate coil 40 on the second surface portion 42 side of the annular plate coil 40. A flat type counter-coil S pole side magnet 21B is arranged. A horizontal annular flat plate coil 40 is positioned with a gap between the counter-coil N-pole magnet 21A and the counter-coil S-pole magnet 21B.

  Further, on the second surface portion 42 side of the annular flat plate coil 40, a substantially flat type counter-coil N pole side magnet 22 </ b> A in which a substantially flat N pole portion 22 c is directed to the annular flat plate coil 40 is disposed. . Corresponding to the substantially planar counter-coil N pole side magnet 22A, a substantially planar S pole portion 22f is directed to the annular flat plate coil 40 on the first surface portion 41 side of the annular flat plate coil 40. A substantially flat type counter-coil S pole side magnet 22B is disposed. A horizontal annular flat plate coil 40 is positioned with a gap between the counter-coil N pole side magnet 22A and the counter coil S pole side magnet 22B.

  If the driving unit 10 of the laser radar scanning lens driving device 1 is configured in this way, the laser radar scanning lens driving device 1 with a better movement of the scanning lens 5 is configured. The magnetic flux density vector that crosses each of the coils 30 and 40 is generated in a substantially linear shape.

More specifically, the lines of magnetic force between the substantially flat-type counter-coil N-pole side magnet 11A (FIG. 3) and the substantially flat-type counter-coil S-pole side magnet 11B are substantially flat. Magnetic field lines are applied from the N pole portion 11c to the substantially planar S pole portion 11f of the counter-coil S pole side magnet 11B. A strong magnetic field is generated between the substantially flat type counter-coil N pole side magnet 11A and the substantially flat type counter coil S pole side magnet 11B. The annular plate coil 30 is located in the magnetic field between the substantially flat type counter-coil N pole side magnet 11A and the substantially flat plate type counter coil S pole side magnet 11B, and current flows through the annular plate type coil 30. As a result, an electromagnetic force is generated in the annular flat plate coil 30, and the annular flat plate coil 30 is moved.

  Further, the magnetic lines of force between the substantially flat-type counter-coil N-pole side magnet 12A and the substantially flat-type counter-coil S-pole side magnet 12B are paired from the substantially flat N-pole part 12c of the counter-coil N-pole side magnet 12A. The magnetic field lines are applied to the substantially planar S pole portion 12f of the coil S pole side magnet 12B. A strong magnetic field is generated between the substantially flat type counter-coil N pole side magnet 12A and the substantially flat type counter coil S pole side magnet 12B. The annular flat plate coil 30 is located in the magnetic field between the substantially flat type counter-coil N pole side magnet 12A and the substantially flat type counter coil S pole side magnet 12B, and current flows through the annular flat plate coil 30. As a result, an electromagnetic force is generated in the annular flat plate coil 30, and the annular flat plate coil 30 is moved. For example, a reciprocating closed magnetic field is applied to one vertical coil 30. Therefore, a large electromagnetic force is generated substantially uniformly in one vertical coil 30. An effective electromagnetic force vector is generated in one vertical coil 30.

  Further, the magnetic field lines between the substantially flat type counter-coil N pole side magnet 21A (FIG. 4) and the substantially flat type counter coil S pole side magnet 21B are substantially flat N poles of the counter coil N pole side magnet 21A. Magnetic field lines are applied from the portion 21c to the substantially planar S pole portion 21f of the counter coil S pole side magnet 21B. A strong magnetic field is generated between the substantially flat type counter-coil N pole side magnet 21A and the substantially flat type counter coil S pole side magnet 21B. The annular plate coil 40 is located in a magnetic field between the substantially flat type counter-coil N pole side magnet 21A and the substantially flat plate type counter coil S pole side magnet 21B, and current flows through the annular plate type coil 40. As a result, electromagnetic force is generated in the annular flat plate coil 40 and the annular flat plate coil 40 is moved.

  Further, the magnetic lines of force between the substantially flat-type counter-coil N-pole side magnet 22A and the substantially flat-type counter-coil S-pole side magnet 22B are paired from the substantially flat N-pole portion 22c of the counter-coil N-pole side magnet 22A. The magnetic field lines are applied to the substantially planar S pole portion 22f of the coil S pole side magnet 22B. A strong magnetic field is generated between the substantially flat type counter-coil N pole side magnet 22A and the substantially flat type counter coil S pole side magnet 22B. The annular plate coil 40 is located in a magnetic field between the substantially flat type counter-coil N pole side magnet 22A and the substantially flat plate type counter coil S pole side magnet 22B, and current flows through the annular plate type coil 40. As a result, electromagnetic force is generated in the annular flat plate coil 40 and the annular flat plate coil 40 is moved. For example, a reciprocating closed magnetic field is applied to one horizontal coil 40. Therefore, a large electromagnetic force is generated substantially uniformly in one horizontal coil 40. An effective electromagnetic force vector is generated in one horizontal coil 40.

  A plurality of magnets 11A, 11B, 12A, and 12B arranged in the vicinity of the periphery of the coil 30 (FIGS. 1 and 7) are substantially rectangular parallelepiped in which the N pole portion 11c is directed to the annular flat plate coil 30 as shown in FIG. The first counter-coil N pole-side magnet 11A having a shape, the substantially rectangular parallelepiped second counter-coil N-pole magnet 12A with the N-pole portion 12c directed to the annular flat plate coil 30, and the annular flat plate coil 30 On the other hand, a substantially rectangular parallelepiped first counter-coil S pole side magnet 11B in which the S pole portion 11f is directed, and a substantially rectangular parallelepiped second pair coil in which the S pole portion 12f is directed to the annular flat plate coil 30 The S pole side magnet 12B is used.

The annular flat coil 30 (FIG. 7) is configured in advance in a substantially rectangular shape by winding a conductor 36 around a jig (not shown). As the conductor 36, a thin-diameter enamel-coated electric wire 36 was used. The electric wire 36 is connected to a small-diameter suspension wire 63 (FIGS. 1, 3 and 4) so as to be energized by, for example, a solder material 105 (FIGS. 1 and 2). For example, when the annular flat plate coil 30 (FIG. 7) is viewed in plan, the annular flat plate coil 30 is recognized as a substantially rectangular annular flat plate coil 30.

  The substantially rectangular annular flat plate coil 30 includes, for example, a substantially straight flat plate-like first piece 31g through which a current flows along the front upper direction D21, and a lower front direction opposite to the front upper direction D21. A substantially straight flat plate-like second piece portion 32g through which a current flows along D22; a substantially straight flat plate-like third piece portion 33g coupled from the first piece portion 31g to the second piece portion 32g; A substantially straight flat plate-like fourth piece part 34g formed from the piece part 32g to the first piece part 31g.

  The current flows from the first piece 31g through the third piece 33g, through the second piece 32g, through the fourth piece 34g, and to the first piece 31g. When the laser radar scanning lens drive device 1 is viewed from the front, a current flows counterclockwise through the substantially rectangular annular flat plate coil 30, and as shown in FIG. In addition, an electromagnetic force along the front left direction D12 is generated. When the laser radar scanning lens driving device 1 is viewed from the front, a current flows through the substantially rectangular annular flat plate coil 30 clockwise.

  As shown in FIG. 3, on the first surface portion 31 side of the annular flat plate coil 30, a first counter-coil N pole side magnet 11 </ b> A with the N pole portion 11 c directed to the annular flat plate coil 30 is arranged. Corresponding to the first counter-coil N-pole side magnet 11A, the first counter-coil S-pole with the S-pole part 11f directed to the annular flat-plate coil 30 on the second surface part 32 side of the annular flat-plate coil 30 A side magnet 11B is arranged. The first counter-coil N pole-side magnet 11A and the first counter-coil S pole-side magnet 11B are arranged so as to face different poles. The first piece 31g of the annular flat plate coil 30 is positioned in a state where a gap is provided between the first counter-coil N-pole magnet 11A and the first counter-coil S-pole magnet 11B.

  Adjacent to the first counter-coil S-pole side magnet 11B, the second counter-coil N-pole with the N-pole portion 12c directed to the annular flat plate coil 30 on the second surface portion 32 side of the annular flat plate coil 30 A side magnet 12A is arranged. Corresponding to the second counter-coil N-pole magnet 12A, the second counter-coil S having the S-pole portion 12f directed toward the annular flat plate coil 30 on the first surface portion 31 side of the annular flat plate coil 30. The pole side magnet 12B is disposed adjacent to the first counter-coil N pole side magnet 11A. The second counter-coil N pole-side magnet 12A and the second counter-coil S pole-side magnet 12B are arranged so as to face different poles. The second piece 32g of the annular flat plate coil 30 is located in a state where a gap is provided between the second counter-coil N-pole magnet 12A and the second counter-coil S-pole magnet 12B. The magnets 11A, 11B, 12A, and 12B are, for example, two-pole magnets 11A, 11B, 12A, and 12B.

  If the drive unit 10 of the scanning lens driving device 1 for laser radar is configured in this way, the scanning lens driving device 1 for laser radar with better movement of the scanning lens 5 is configured. The magnetic lines of force between the substantially rectangular parallelepiped first counter-coil N pole side magnet 11A and the substantially rectangular parallelepiped first counter coil S pole side magnet 11B are N poles of the first counter coil N pole side magnet 11A. It becomes a substantially linear magnetic field line applied from the part 11c to the S pole part 11f of the first counter-coil S pole side magnet 11B. The first piece 31g of the substantially rectangular annular flat plate coil 30 is located in the magnetic field between the first counter-coil N pole-side magnet 11A and the first counter-coil S pole-side magnet 11B. When a current flows through the first piece portion 31g of the rectangular plate-shaped coil 30 along the front upper direction D21, electromagnetic force is generated in the first piece portion 31g of the plate-shaped coil 30 and the plate-shaped coil. 30 is moved substantially along the front left direction D12.

The magnetic field lines between the substantially rectangular parallelepiped second counter coil N pole side magnet 12A and the substantially rectangular parallelepiped second counter coil S pole side magnet 12B are the same as those of the second counter coil N pole side magnet 12A. The magnetic field lines are substantially linear from the N pole portion 12c to the S pole portion 12f of the second counter-coil S pole side magnet 12B. The second piece 32g of the substantially rectangular annular flat plate coil 30 is positioned in the magnetic field between the second counter-coil N-pole magnet 12A and the second counter-coil S-pole magnet 12B. When a current flows through the second piece 32g of the rectangular plate-shaped coil 30 along the lower front direction D22, an electromagnetic force is generated in the second piece 32g of the ring-shaped plate coil 30, and the ring-plate type The coil 30 is moved substantially along the front left direction D12.

  At this time, the direction D12 of electromagnetic force generated in the first piece 31g of the annular flat plate coil 30 and the direction D12 of electromagnetic force generated in the second piece 32g of the annular flat plate coil 30 coincide. Therefore, the driving direction of the first piece 31g of the annular flat coil 30 located in the magnetic field between the first counter-coil N-pole magnet 11A and the first counter-coil S-pole magnet 11B, and the second The driving direction of the second piece 32g of the annular flat coil 30 positioned in the magnetic field between the second coil N pole side magnet 12A and the second second coil S pole side magnet 12B coincides.

  For example, when the same amount of current is applied to two coils having the same number of coil turns, the coil 30 is surrounded by four different-polarity opposed magnets 11A, 11B, 12A, 12B, and so on. There is a large difference in the electromagnetic force generated in the coil 30 when it is not. When a current is passed through the coil 30 surrounded by the four different-polarity opposed magnets 11A, 11B, 12A, and 12B, a large electromagnetic force is generated in the coil 30 as compared with a coil that is not so configured.

  For example, even if the number of turns of the electric wire 36 is the annular flat plate coil 30, a large electromagnetic force is generated in the annular flat plate coil 30. When an electric current is passed through the annular flat plate coil 30, the annular flat plate coil 30 is moved smoothly. Further, the use of the annular flat plate coil 30 having a small number of turns of the electric wire 36 allows the laser radar scanning lens driving device 1 to be miniaturized.

  A plurality of magnets 21A, 21B, 22A, and 22B arranged near the periphery of the coil 40 (FIGS. 1, 7, and 8) have an N-pole portion 21c directed toward the annular flat plate coil 40 as shown in FIG. A substantially rectangular parallelepiped first counter-coil N pole side magnet 21A, a substantially rectangular parallelepiped second counter coil N pole side magnet 22A with the N pole portion 22c facing the annular flat plate coil 40, and an annular flat plate The first counter-coil S pole-side magnet 21B having a substantially rectangular parallelepiped shape with the S pole portion 21f directed to the mold coil 40, and the substantially rectangular parallelepiped second shape having the S pole portion 22f directed to the annular flat plate coil 40. The counter coil S pole side magnet 22B.

  The annular flat plate coil 40 (FIGS. 7 and 8) is formed in a substantially rectangular shape in advance by winding a conductor 46 around a jig (not shown). As the conductor 46, a small-diameter enamel-coated electric wire 46 was used. The electric wire 46 is connected to a thin suspension wire 64 (FIGS. 1, 3, and 4) by a solder material 105 (FIGS. 1 and 2) and the like so as to be energized. For example, when the annular flat plate coil 40 (FIGS. 7 and 8) is viewed in plan (FIG. 8), the annular flat plate coil 40 is recognized as a substantially rectangular annular flat plate coil 40.

  The substantially rectangular annular flat plate coil 40 (FIGS. 7 and 8) includes, for example, a substantially straight flat plate-like first piece 41g through which a current flows along the front right direction D11, and a direction opposite to the front right direction D11. A substantially straight flat plate-like second piece 42g through which current flows along the front left direction D12, and a substantially straight flat plate-like third piece coupled from the first piece 41g to the second piece 42g. A portion 43g and a substantially straight flat plate-like fourth piece portion 44g coupled from the second piece portion 42g to the first piece portion 41g.

The current flows from the first piece 41g through the third piece 43g, through the second piece 42g, through the fourth piece 44g, and into the first piece 41g. When the scanning lens driving device 1 for laser radar is viewed from the front, a current flows through the substantially rectangular annular flat plate coil 40 in a counterclockwise direction, so that an approximately rectangular annular flat plate as shown in FIGS. An electromagnetic force along the front upper direction D <b> 21 is generated in the mold coil 40. Note that when the laser radar scanning lens driving device 1 is viewed from the front, a current flows in the substantially rectangular plate-shaped coil 40 in a clockwise direction.

  As shown in FIG. 4, the first counter-coil N pole side magnet 21 </ b> A having the N pole portion 21 c directed to the annular flat plate coil 40 is disposed on the first surface portion 41 side of the annular flat plate coil 40. Corresponding to the first counter-coil N-pole magnet 21A, the first counter-coil S-pole having the S-pole part 21f directed to the annular flat-plate coil 40 on the second surface part 42 side of the annular flat-plate coil 40 A side magnet 21B is arranged. The first counter-coil N pole-side magnet 21A and the first counter-coil S pole-side magnet 21B are arranged so as to face different poles. The first piece 41g of the annular flat coil 40 is positioned with a gap between the first counter-coil N-pole magnet 21A and the first counter-coil S-pole magnet 21B.

  Adjacent to the first counter-coil S pole-side magnet 21B, the second counter-coil N pole with the N-pole portion 22c facing the annular flat-plate coil 40 on the second surface portion 42 side of the annular flat-plate coil 40 A side magnet 22A is arranged. Corresponding to the second counter-coil N-pole magnet 22A, the second counter-coil S having the S-pole portion 22f directed to the annular flat plate coil 40 on the first surface portion 41 side of the annular flat plate coil 40. The pole side magnet 22B is disposed adjacent to the first counter-coil N pole side magnet 21A. The second counter-coil N pole-side magnet 22A and the second counter-coil S pole-side magnet 22B are arranged so as to face each other. The second piece 42g of the annular flat plate coil 40 is positioned in a state where a gap is provided between the second counter-coil N-pole magnet 22A and the second counter-coil S-pole magnet 22B. The magnets 21A, 21B, 22A, and 22B are, for example, two-pole magnets 21A, 21B, 22A, and 22B.

  If the drive unit 10 of the scanning lens driving device 1 for laser radar is configured in this way, the scanning lens driving device 1 for laser radar with better movement of the scanning lens 5 is configured. The line of magnetic force between the first counter coil N pole side magnet 21A having a substantially rectangular parallelepiped shape and the first counter coil S pole side magnet 21B having a substantially rectangular parallelepiped shape is the N pole of the first counter coil N pole side magnet 21A. This is a substantially linear magnetic field line extending from the portion 21c to the south pole portion 21f of the first counter-coil south pole side magnet 21B. A first piece 41g of a substantially rectangular annular flat plate coil 40 is located in the magnetic field between the first counter-coil N-pole magnet 21A and the first counter-coil S-pole magnet 21B. When an electric current flows through the first piece 41g of the rectangular plate-shaped coil 40 along the front right direction D11, an electromagnetic force is generated in the first piece 41g of the plate-shaped coil 40, and the ring-shaped plate coil. 40 is moved substantially along the front upper direction D21.

  The magnetic field lines between the substantially rectangular parallelepiped second counter coil N pole side magnet 22A and the substantially rectangular parallelepiped second counter coil S pole side magnet 22B are the same as those of the second counter coil N pole side magnet 22A. A substantially linear magnetic field line is applied from the N pole part 22c to the S pole part 22f of the second counter-coil S pole side magnet 22B. In the magnetic field between the second counter-coil N pole side magnet 22A and the second counter coil S pole side magnet 22B, the second piece 42g of the substantially rectangular annular flat plate coil 40 is located, and is substantially When a current flows through the second piece 42g of the rectangular plate-shaped coil 40 along the front left direction D12, electromagnetic force is generated in the second piece 42g of the plate-shaped coil 40, and the ring-shaped plate coil. 40 is moved substantially along the front upper direction D21.

At this time, the direction D21 of the electromagnetic force generated in the first piece 41g of the annular flat plate coil 40 coincides with the direction D21 of the electromagnetic force generated in the second piece 42g of the annular flat plate coil 40. Accordingly, the driving direction of the first piece 41g of the annular flat coil 40 located in the magnetic field between the first counter-coil N-pole magnet 21A and the first counter-coil S-pole magnet 21B, and the second The driving direction of the second piece 42g of the annular flat coil 40 positioned in the magnetic field between the second coil N pole side magnet 22A and the second second coil S pole side magnet 22B coincides.

  For example, when the same amount of current is applied to two coils having the same number of coil turns, the coil 40 is surrounded by four different-polarity opposed magnets 21A, 21B, 22A, 22B, and so on. There is a large difference in the electromagnetic force generated in the coil 40 when not done. When a current is passed through the coil 40 surrounded by the four different-polarity opposed magnets 21A, 21B, 22A, and 22B, a large electromagnetic force is generated in the coil 40 as compared with a coil that is not so configured.

  For example, even if the annular flat plate coil 40 has a small number of turns of the electric wire 46, a large electromagnetic force is generated in the annular flat plate coil 40. When the current flows through the annular flat plate coil 40, the annular flat plate coil 40 is smoothly moved. Further, the use of the annular flat coil 40 having a small number of turns of the electric wire 46 allows the laser radar scanning lens driving device 1 to be miniaturized.

  First vertical pair coil N pole side magnet 11A (FIGS. 1 to 3), first vertical pair coil S pole side magnet 11B (FIGS. 1, 3 and 5), and second vertical type The counter-coil N pole side magnet 12A and the second vertical counter-coil S pole side magnet 12B are all formed in the same shape and all have the same characteristics. The first vertical pair coil N pole side magnet 11A, the first vertical pair coil S pole side magnet 11B, the second vertical pair coil N pole side magnet 12A, the second vertical pair coil N pole side magnet Although 12B differs in a deployment position, an arrangement | positioning direction, etc., all are made into magnet 11A, 11B, 12A, 12B of the same shape characteristic.

  The first horizontal counter-coil N pole side magnet 21A (FIGS. 1, 2, and 4), the first horizontal counter-coil S pole side magnet 21B (FIGS. 1, 4, and 5), and the second The horizontal pair coil N pole side magnet 22A and the second horizontal pair coil S pole side magnet 22B are all formed in the same shape and have the same characteristics. The first horizontal type counter coil N pole side magnet 21A, the first horizontal type counter coil S pole side magnet 21B, the second horizontal type counter coil N pole side magnet 22A, and the second horizontal type counter coil S pole side magnet 22B are provided. The magnets 21A, 21B, 22A, and 22B all have the same shape characteristics, although their positions and arrangement directions are different.

  Thereby, the price of the scanning lens driving device 1 for laser radar can be kept low. First vertical pair coil N pole side magnet 11A, first vertical pair coil S pole side magnet 11B, second vertical pair coil N pole side magnet 12A, and second vertical pair coil S The pole-side magnets 12B are all formed in the same shape and have the same characteristics, so that the mass production effect is exhibited, and each of the vertical pair coils N pole-side magnets 11A and 12A and each of the vertical pair coils The price of the south pole side magnets 11B and 12B can be reduced.

  Further, the first horizontal type counter coil N pole side magnet 21A, the first horizontal type counter coil S pole side magnet 21B, the second horizontal type counter coil N pole side magnet 22A, and the second horizontal type counter coil S pole side magnet 21B. Since the magnets 22B are all formed in the same shape and have the same characteristics, mass production effects are exhibited, and each horizontal type counter coil N pole side magnet 21A, 22A and each horizontal type counter coil S pole side magnet. Price reduction of 21B and 22B is achieved.

  Accordingly, each of the vertical pair coil N pole side magnets 11A and 12A, each of the vertical pair coil S pole side magnets 11B and 12B, each of the horizontal pair coil N pole side magnets 21A and 22A, and each of the horizontal pair coil S pole side. The price of the laser radar scanning lens driving device 1 including the magnets 21B and 22B can be reduced.

  When the coil 30 (FIGS. 5 and 7) is viewed in plan, the coil 30 is configured in a substantially annular, substantially rectangular shape. When a current is passed through the coil 30, the direction of the electromagnetic force acting on the pair of long pieces 31g and 32g (FIG. 7) constituting the substantially annular coil 30 is made the same direction and coincides with each other. The pole portions 11c, 11f, 12c, and 12f (FIG. 3) of the magnets 11A, 11B, 12A, and 12B (FIGS. 1 to 3) are disposed.

  If the pole portions 11c, 11f, 12c, and 12f of the magnets 11A, 11B, 12A, and 12B are arranged in this way, the coil 30 that constitutes the drive unit 10 of the laser radar scanning lens drive device 1 is easily driven. Become. When a current is passed through the coil 30, electromagnetic force in the direction along the same direction acts on the pair of long pieces 31 g and 32 g constituting the substantially annular coil 30. Easily moved along one direction. Therefore, the laser radar scanning lens driving device 1 having excellent acceleration sensitivity is configured.

  In addition, when the coil 40 (FIGS. 5, 7, and 8) is viewed in plan, the coil 40 is configured in a substantially annular and substantially rectangular shape. When a current is passed through the coil 40, the direction of the electromagnetic force acting on the pair of long pieces 41g, 42g (FIGS. 7 and 8) constituting the substantially annular coil 40 is substantially the same. Thus, the pole portions 21c, 21f, 22c, and 22f (FIG. 4) of the magnets 21A, 21B, 22A, and 22B (FIGS. 1, 2, and 4) are disposed.

  If the pole portions 21c, 21f, 22c, and 22f of the magnets 21A, 21B, 22A, and 22B are arranged in this way, the coil 40 that constitutes the drive unit 10 of the laser radar scanning lens drive device 1 is easily driven. Become. When a current is passed through the coil 40, the electromagnetic force in the direction along the same direction acts on the pair of long piece portions 41g and 42g constituting the substantially annular coil 40 having a substantially annular shape. Easily moved along one direction. Therefore, the laser radar scanning lens driving device 1 having excellent acceleration sensitivity is configured.

  A direction substantially orthogonal to the optical axis of the laser light that passes through the scanning lens 5 (FIGS. 1 and 2) is defined as, for example, a first axial direction D1. The pair of coils 30 and 30 (FIGS. 1 and 7) is a pair of first axial driving coils 30 and 30 that move the scanning lens 5 (FIG. 1) along the first axial direction D1. The magnets 11A, 11B, 12A, and 12B are first axial driving magnets 11A, 11B, 12A, and 12B corresponding to the first axial driving coil 30, respectively.

  By configuring the laser radar scanning lens driving device 1 in this way, the scanning lens 5 of the laser radar scanning lens driving device 1 includes a coil 30 and a driving unit 10 of the laser radar scanning lens driving device 1. The magnets 11A, 11B, 12A, and 12B are accurately moved along the first axial direction D1. By passing a current through the pair of first axial driving coils 30, 30, the scanning lens 5 of the laser radar scanning lens driving device 1 is moved quickly and accurately along the first axial direction D 1.

  For example, a pair of second axial driving coils (40, 40) for moving the scanning lens (5) along the second axial direction (D2) according to the design / specification of the scanning lens driving device (1) for laser radar. ) And the second axial driving coil (40) corresponding to the second axial driving magnet (21A, 21B, 22A, 22B) without being equipped, the scanning lens (5) is moved to the first axis. A pair of first axial drive coils (30, 30) moved along only the direction (D1), and each first axial drive magnet (11A) corresponding to the first axial drive coil (30) , 11B, 12A, 12B) may be provided in the laser radar scanning lens driving device (1).

  By doing so, the laser radar scanning which can move the scanning lens (5) only along the first axial direction (D1) while suppressing the number of parts of the scanning lens driving device (1) for laser radar is reduced. A lens driving device (1) is configured. Accordingly, it is possible to provide the laser radar scanning lens driving device (1) for driving the first axial direction (D1) with a low price.

  For example, the direction substantially orthogonal to the optical axis of the laser beam that passes through the scanning lens 5 (FIGS. 1 and 2) is defined as the first axial direction D1 for convenience. Further, for example, a direction substantially orthogonal to the optical axis of the laser light transmitted through the scanning lens 5 and substantially orthogonal to the first axis direction D1 is defined as a second axis direction D2 for convenience.

  A pair of one or more coils 30, 30, 40, and 40 (FIGS. 1, 5, and 7) constituting the driving unit 10 of the laser radar scanning lens driving device 1 move the scanning lens 5 along the first axial direction D1. Two pairs of coils 30, which are a pair of first axial drive coils 30 and 30 to be moved and a pair of second axial drive coils 40 and 40 to move the scanning lens 5 along the second axial direction D2. 30 and 40, 40.

  A plurality of magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B (FIGS. 1, 2, and 5) constituting the driving unit 10 of the laser radar scanning lens driving device 1 are a pair of first magnets. An even pair of first axial drive magnets 11A, 11B, 12A, 12B and 11A, 11B, 12A, 12B corresponding to the single axial drive coils 30 and 30, a pair of second axial drive coils 40 and An even pair of second axial drive magnets 21A, 21B, 22A, 22B and 21A, 21B, 22A, 22B corresponding to 40 is set.

  More specifically, even-numbered pairs of magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B (FIGS. 1, 2, and 5) that constitute the driving unit 10 of the laser radar scanning lens driving device 1 are as follows. A total of four pairs of first axial drive magnets 11A, 11B, 12A, 12B and 11A, 11B, 12A, 12B corresponding to the pair of first axial drive coils 30 and 30, and a pair of second axial drive A total of four pairs of second axial drive magnets 21A, 21B, 22A, 22B and 21A, 21B, 22A, 22B corresponding to the coils 40 and 40 are provided. A total of eight pairs of magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, 22B and 11A, 11B, 12A, 12B, 21A, 21B, 22A, 22B are used. A drive unit 10 is configured.

  By configuring the driving unit 10 of the laser radar scanning lens driving device 1 in this way, the scanning lens 5 of the laser radar scanning lens driving device 1 is configured as the driving unit 10 constituting the laser radar scanning lens driving device 1. Therefore, it is moved with high accuracy along the first axial direction D1. More specifically, the scanning lens 5 of the laser radar scanning lens driving apparatus 1 includes a pair of first axial driving coils 30 and 30 and an even number of pairs of the first axial driving coils 30 and 30 constituting the driving unit 10 of the laser radar scanning lens driving apparatus 1. The uniaxial driving magnets 11A, 11B, 12A, 12B, 11A, 11B, 12A, and 12B are accurately moved along the first axial direction D1. By simultaneously supplying current to the pair of first axial driving coils 30, 30, the scanning lens 5 of the laser radar scanning lens driving device 1 is moved quickly and accurately along the first axial direction D 1.

Further, by configuring the drive unit 10 of the laser radar scanning lens driving device 1 in this way, the scanning lens 5 of the laser radar scanning lens driving device 1 is driven to constitute the laser radar scanning lens driving device 1. The part 10 is accurately moved along the second axial direction D2. More specifically, the scanning lens 5 of the laser radar scanning lens driving device 1 includes a pair of second axial driving coils 40, 40 and an even number of pairs of second axial driving coils 40, 40 constituting the driving unit 10 of the laser radar scanning lens driving device 1. The two-axis direction driving magnets 21A, 21B, 22A, 22B, 21A, 21B, 22A, and 22B are accurately moved along the second axial direction D2. By simultaneously supplying current to the pair of second axial drive coils 40, 40, the scanning lens 5 of the laser radar scanning lens driving device 1 is moved quickly and accurately along the second axial direction D2.

  The scanning lens 5 of the laser radar scanning lens driving apparatus 1 is freely driven along the first axial direction D1 and the second axial direction D2. The scanning lens 5 is driven only along the two directions of the first axis direction D1 and the second axis direction D2 without being moved along the optical axis direction D0.

  When the first axial direction D1 is defined as the horizontal direction and the second axial direction D2 is defined as the vertical direction, the first axial driving coil 30 is formed larger than the second axial driving coil 40. (FIGS. 1, 5, and 7). That is, the horizontal operation coil 30 is formed larger than the vertical operation coil 40.

  Also, the first axial drive magnets 11A, 11B, 12A, and 12B are formed larger than the second axial drive magnets 21A, 21B, 22A, and 22B (FIGS. 1, 2, and 5). That is, the horizontal operation magnets 11A, 11B, 12A, and 12B are formed larger than the vertical operation magnets 21A, 21B, 22A, and 22B.

  As a result, the laser radar scanning lens driving device 1 including the scanning lens 5 having a larger working range along the horizontal direction than a working range along the vertical direction is configured. The laser radar scanning lens driving device 1 is mounted on, for example, one or both of a front side portion and a rear side portion of an automobile (not shown), and is approximately separated from the scanning lens 5 of the laser radar scanning lens driving device 1. Detects objects and targets within a range up to 70 meters away. Further, the laser radar scanning lens driving device 1 detects an object within a size of approximately two tatami mats about 70 m away from the scanning lens 5 of the laser radar scanning lens driving device 1. The aspect ratio of the width is 2: 1. In other words, the laser radar scanning lens driving device 1 detects an object that is within a ratio of 2 to 2 in the length of about 1 in about 70 m from the scanning lens 5.

  Depending on the design / specifications of the laser radar scanning lens driving device (1), for example, instead of the pair of second axial driving lateral coils 40, 40 that move the scanning lens 5 along the second axial direction D2, A pair of other first axial driving vertical coils (40, 40) for moving the scanning lens (5) along the first axial direction D1 may be used. Further, instead of the even-numbered second axial driving horizontal magnets 21A, 21B, 22A, 22B and 21A, 21B, 22A, 22B corresponding to the pair of second axial driving horizontal coils 40, 40, An even number of other first axial drive vertical magnets (21A, 21B, 22A, 22B, and 21A, 21B, corresponding to a pair of other first axial drive vertical coils (40 and 40). 22A, 22B) may be used.

  When the laser radar scanning lens driving device (1) is configured as described above, the scanning lens (5) of the laser radar scanning lens driving device (1) is driven by the laser radar scanning lens driving device (1). By means of the vertical coils 30 and (40) constituting the part (10) and the vertical magnets 11A, 11B, 12A, 12B and (21A, 21B, 22A, 22B), it is easy and reliable along only the first axial direction D1. Moved to. A current is simultaneously supplied to the pair of first axial driving vertical coils 30 and 30 and the pair of other first axial driving vertical coils (40, 40), thereby scanning the laser radar scanning lens. The scanning lens (5) of the drive device (1) is easily and quickly moved reliably along only the first axial direction D1.

  In this case, the vertical coils 30 and (40) and the vertical magnets 11A, 11B, 12A, 12B and (21A, 21B, 22A, 22B) constituting the driving unit (10) of the scanning lens driving device (1) for laser radar. ) Drives the scanning lens (5) only along the first axial direction D1, so when the scanning lens (5) is moved along the first axial direction D1, the scanning lens (5) moves in the first axial direction D1. A large force is generated in the drive unit (10) of the laser radar scanning lens drive device (1).

  The laser radar scanning lens driving device 1 (FIGS. 1 and 2) includes a lens holder 50 (FIG. 6) equipped with a plurality of coils 30, 30, 40 and 40 (FIG. 7) and a single scanning lens 5. ). More specifically, in the driving unit 10 of the laser radar scanning lens driving device 1, two pairs of coils 30, 30, 40, and 40 (FIG. 7) are arranged on the left and right sides of the scanning lens 5 so that the scanning lens 5 is located at the center. A single scanning lens 5 is provided with a substantially rectangular flat plate-shaped thermoplastic synthetic resin lens holder 50 (FIG. 6) which is mounted on the top and bottom and mounted on a substantially central portion 50c (FIGS. 1 and 2). It is configured as.

  The lens holder 50 on which the coils 30 and 40 are equipped is formed using a synthetic resin material having excellent insulating properties. The lens holder 50 is formed using a synthetic resin material having a specific gravity smaller than that of a metal material and suitable for weight reduction. More specifically, the lens holder 50 is formed on the basis of an injection molding method excellent in mass productivity using a thermoplastic resin excellent in moldability such as a liquid crystal polymer.

  A part of the lens holder 50 is located in the effective magnetic field of each of the vertical first surface side magnets 11A and 12B (FIG. 1). A part of the lens holder 50 is located in the effective magnetic field of each of the vertical second surface side magnets 11B and 12A. At the same time, the lens holder 50 is mounted in an effective magnetic field between the two vertical first surface side magnets 11A and 12B and the two vertical second surface side magnets 11B and 12A. One vertical coil 30 (FIGS. 1 and 7) is located.

  In addition, a part of the lens holder 50 is positioned in the effective magnetic field of each horizontal first surface side magnet 21A, 22B (FIG. 1). Further, a part of the lens holder 50 is located in the effective magnetic field of each of the horizontal second surface side magnets 21B and 22A. At the same time, one horizontal type mounted on the lens holder 50 in an effective magnetic field between the two horizontal first surface side magnets 21A and 22B and the two horizontal second surface side magnets 21B and 22A. The coil 40 (FIGS. 1 and 7) is located.

  If the drive unit 10 of the laser radar scanning lens driving device 1 (FIG. 1) is configured as described above, when a current is passed through the coils 30 and 40, one scanning lens 5 and each coil 30, The lens holder 50 equipped with 40 is reliably driven.

  A current is passed through one vertical coil 30 located in the effective magnetic field between the two vertical first surface side magnets 11A and 12B and the two vertical second surface side magnets 11B and 12A. Thus, electromagnetic force is generated in the vertical coil 30 and the vertical coil 30 moves along the left-right direction D1.

  In addition, a current is passed through one horizontal coil 40 located in an effective magnetic field between the two horizontal first surface side magnets 21A and 22B and the two horizontal second surface side magnets 21B and 22A. Electromagnetic force is generated in the horizontal coil 40, and the horizontal coil 40 moves along the vertical direction D2.

Therefore, the lens holder 50 equipped with two pairs of coils 30, 30, 40, 40 and one scanning lens 5 is caused by electromagnetic force generated in the pair of vertical coils 30, 30 or the pair of horizontal coils 40, 40. It is smoothly and reliably driven along the left-right direction D1 or the up-down direction D2. The lens holder 50 is formed as a component of the driving unit 10 of the laser radar lens driving device 1.

  As shown in FIG. 6, the lens holder 50 is formed in a thin, substantially rectangular flat plate shape. Further, the material forming the lens holder 50 can withstand the heat during the soldering operation without being significantly deformed by the heat during the soldering operation when the soldering operation is performed on the lens holder 50. Required. For this reason, the lens holder 50 is a liquid crystal polymer (LCP: Liquid Crystal Polymer) that is excellent in thin moldability, excellent in heat resistance, excellent in injection moldability, and can be lighter than iron materials. Is preferably used.

  Examples of the type I liquid crystal polymer having excellent heat resistance include Sumika Super (registered trademark) manufactured by Sumitomo Chemical Co., Ltd. Moreover, as a product of Sumika Super (registered trademark), for example, E5008L, E6008, and the like can be given.

  Examples of the type I liquid crystal polymer having excellent heat resistance include: Seider (registered trademark) manufactured by Nippon Oil Corporation. Moreover, as a product of Seider (registered trademark), for example, 300 series, 400 series, RC, FC series and the like can be mentioned. If it demonstrates in detail, grade M-350, grade M-450, grade FC-120 etc. will be mentioned as goods of Seider (registered trademark), for example.

  Examples of the type II liquid crystal polymer include Vectra (registered trademark) manufactured by Polyplastics Co., Ltd. Examples of Vectra (registered trademark) products include grades A410 and S471.

  The two pairs of coils 30, 30, 40, 40 (FIG. 7) are made of one substantially rectangular flat plate-like thermoplastic synthetic resin in which one scanning lens 5 is mounted on the substantially central portion 50 c (FIGS. 1 and 2). The lens holder 50 (FIG. 6) is disposed.

  One lens holder 50 is positioned in a non-contact state between each vertical first surface side magnet 11A, 12B (FIG. 1) and each vertical type second surface side magnet 11B, 12A. At the same time, one vertical coil 30 (see FIGS. 1 and 7) is provided between the two vertical first surface side magnets 11A and 12B and the two vertical second surface side magnets 11B and 12A. ) Is located in a non-contact state.

  One lens holder 50 is positioned in a non-contact state between each horizontal first surface side magnet 21A, 22B (FIG. 1) and each horizontal second surface side magnet 21B, 22A. At the same time, one horizontal coil 40 (FIGS. 1 and 7) is not provided between the two horizontal first-surface magnets 21A and 22B and the two horizontal second-surface magnets 21B and 22A. Located in contact.

  If the drive unit 10 of the laser radar scanning lens driving device 1 (FIG. 1) is configured as described above, when a current is passed through the coils 30 and 40, one scanning lens 5 and each coil 30, The lens holder 50 equipped with 40 is reliably driven.

Magnetic field lines are generated between the vertical first surface side magnet 11A and the vertical second surface side magnet 11B, and the vertical first surface side magnet 11A and the vertical second surface side magnet 11B. A strong magnetic field is created between Further, a magnetic field line is generated between the vertical second surface side magnet 12A and the vertical first surface side magnet 12B, and the vertical second surface side magnet 12A and the vertical first surface side A strong magnetic field is generated between the magnet 12B. A current is passed through one vertical coil 30 positioned between the two vertical first surface side magnets 11A, 12B and the two vertical second surface side magnets 11B, 12A, thereby causing the vertical type Electromagnetic force is generated in the coil 30, and the vertical coil 30 moves along the left-right direction D1.

  Further, a magnetic line of force is generated between the horizontal first surface side magnet 21A and the horizontal second surface side magnet 21B, and the horizontal first surface side magnet 21A and the horizontal second surface side magnet 21B. A strong magnetic field is created between them. Further, a magnetic line of force is generated between the horizontal second surface side magnet 22A and the horizontal first surface side magnet 22B, and the horizontal second surface side magnet 22A and the horizontal first surface side magnet 22B. A strong magnetic field is created between them. When a current flows through one horizontal coil 40 positioned between the two horizontal first surface side magnets 21A and 22B and the two horizontal second surface side magnets 21B and 22A, the horizontal coil 40 is electromagnetically A force is generated and the horizontal coil 40 moves along the vertical direction D2.

  Therefore, the lens holder 50 equipped with two pairs of coils 30, 30, 40, 40 and one scanning lens 5 is caused by electromagnetic force generated in the pair of vertical coils 30, 30 or the pair of horizontal coils 40, 40. It is smoothly and reliably driven along the left-right direction D1 or the up-down direction D2.

  The pair of horizontal operation coils 30 and 30 (FIG. 7) and the pair of vertical operation coils 40 and 40 are one in which one scanning lens 5 (FIGS. 1 and 2) is mounted in a substantially central portion 50c. It is attached to a substantially rectangular flat plate lens holder 50 (FIG. 6).

  A pair of horizontal operation coil mounting portions 53 and 53 (FIG. 6) corresponding to the pair of horizontal operation coils 30 and 30 (FIG. 7) is attached to the lens at the substantially central portion 50 c of one substantially rectangular flat lens holder 50. The lens holder 50 is provided symmetrically with respect to the substantially central portion 50c so as to sandwich the portion 55 from the left and right.

  In addition, a pair of vertical operation coil mounting portions 54 and 54 (FIG. 6) corresponding to the pair of vertical operation coils 40 and 40 (FIG. 7) is provided at the substantially central portion 50c of one substantially rectangular flat plate lens holder 50. The lens holder 50 is provided on the lens holder 50 symmetrically with respect to the substantially central portion 50c so as to sandwich the lens mounting portion 55 from above and below.

  Each pair of coils 30, 30, 40, 40 is easily attached to each pair of coil mounting portions 53, 53, 54, 54 provided in the lens holder 50. By easily attaching the coils 30 and 40 to the coil mounting portions 53, 53, 54, and 54 of the lens holder 50, the assembly work of the laser radar scanning lens driving device 1 is speeded up, and the laser radar The assembling cost of the scanning lens driving device 1 can be kept low. Therefore, the price of the laser radar scanning lens driving device 1 can be easily suppressed to a low price.

  The coil mounting portions 53 and 54 of the substantially rectangular flat lens holder 50 are recessed only on the first surface 51 side on the front side of the lens holder 50. The coil mounting portions 53 and 54 are not recessed on the second surface 52 side of the lens holder 50, which is the surface opposite to the first surface 51.

  A pair of horizontal operation coils 30, 30 configured in advance in a substantially rectangular ring shape are fitted into a pair of horizontal operation coil mounting portions 53, 53 recessed in the lens holder 50. Further, a pair of vertical operation coils 40, 40 configured in advance in a substantially rectangular ring shape are fitted into a pair of vertical operation coil mounting portions 54, 54 provided in a recessed manner in the lens holder 50.

If the coil mounting portions 53 and 54 are recessed in the lens holder 50, the coils 30 and 4
0 is easily and quickly fitted to the coil mounting portions 53 and 54 provided in the lens holder 50 in a recessed manner. By attaching the coils 30 and 40 to the coil mounting portions 53 and 54 of the lens holder 50 easily and quickly, the assembly work of the scanning lens driving device 1 for laser radar is efficiently performed, and the laser radar The assembly cost of the scanning lens driving device 1 can be kept low. Therefore, the price of the laser radar scanning lens driving device 1 can be reduced.

  Fixing holes 56 (FIG. 6) through which thin suspension wires 63 and 64 (FIGS. 1 to 5) are inserted and held are provided at the four corners of the substantially rectangular flat lens holder 50. Each suspension wire 63, 63 (FIG. 1) passed through one of the substantially diagonal fixing holes 56, 56 of the substantially rectangular flat plate lens holder 50 is made of, for example, a solder material 105 or the like and each horizontal operation coil. The 30 and 30 electric wires 36 are connected to be energized. Further, the suspension wires 64 and 64 (FIG. 1) passed through the fixing holes 56 and 56 on the other substantially diagonal line of the substantially rectangular flat lens holder 50 (FIG. 6) are made of, for example, the solder material 105 or the like. Then, it is connected to the electric wire 46 of each of the vertical operation coils 40, 40 so as to be energized.

  Each metal suspension wire 63, 64 is connected to a circuit board 70 (FIGS. 1 to 5) provided with a circuit conductor (not shown) so as to be energized. The main body 75 (FIGS. 3 to 5) of the substrate 70 is formed using a synthetic resin material having excellent insulating properties. For example, a metal circuit conductor (not shown) is formed on the substrate body 75 made of synthetic resin, and an insulating film (not shown) is provided thereon, so that the circuit board 70 is formed. The circuit board is called, for example, a PWB (printed wired board / printed wiring board).

  The lens holder 50 including the coil mounting portions 53 and 54 (FIG. 6) is formed in a substantially rectangular flat plate shape. In addition, the vertical coil 30 (FIG. 7) attached to the vertical coil mounting portion 53 of the lens holder 50 has a substantially rectangular annular shape in which a thin electric wire 36 is wound around a jig (not shown). The coil 30 is configured. Further, the horizontal coil 40 (FIGS. 7 and 8) attached to the horizontal coil mounting portion 54 of the lens holder 50 (FIG. 6) has a thin electric wire 46 wound around a jig (not shown) or the like. It is configured in advance as a substantially rectangular annular coil 40. Adhesive (not shown) is used, and the coils 30 and 40 (FIG. 7) are all bonded and fixed only to the first surface 51 side of the front side of the lens holder 50 (FIG. 6) (FIG. 1). . As the adhesive, a thermosetting adhesive having excellent fixing properties such as an epoxy resin was used.

  Thereby, the manufacturability of the scanning lens driving device 1 for laser radar is improved. Since the pre-configured coils 30 and 40 are bonded only to the first surface 51 side of the lens holder 50 formed in a substantially rectangular flat plate shape, the bonding operation of the coils 30 and 40 to the lens holder 50 is easy. To be done. Since there is no process of bonding the coils 30 and 40 to the second surface 52 side of the lens holder 50, the bonding operation of the coils 30 and 40 to the lens holder 50 is performed efficiently. Accordingly, the bonding cost of the laser radar scanning lens driving device 1 can be kept low. Accordingly, the price of the scanning lens driving device 1 for laser radar is easily reduced to a low price.

  As the coil 30 (FIG. 7), a jig (not shown) or the like is used, and a substantially rectangular annular flat plate coil 30 that is pre-configured by winding a thin-diameter enamel-coated electric wire 36 is used. . Further, as the coil 40 (FIGS. 7 and 8), a jig (not shown) or the like is used, and a substantially rectangular annular flat plate coil that is configured in advance by winding a thin-diameter enamel-coated electric wire 46 is used. 40 was used.

Thereby, the coils 30 and 40 are easily attached to the lens holder 50 (FIG. 6). By using the substantially rectangular annular flat plate coil 30 in which the enameled electric wire 36 is wound around a jig or the like (not shown) in advance, the mounting operation of the coil 30 to the lens holder 50 is facilitated. At the assembly work site of the laser radar scanning lens driving device 1, the troublesome work of forming the coil 30 by directly winding the electric wire 36 around the coil mounting portion 53 of the lens holder 50 is omitted.

  In addition, the use of the substantially rectangular annular flat plate coil 40 in which the enamel wire 46 is wound around a jig or the like (not shown) in advance makes it easy to perform the mounting operation of the coil 40 on the lens holder 50. . In the assembly work site of the laser radar scanning lens driving device 1, the troublesome work of forming the coil 40 by directly winding the electric wire 46 around the coil mounting portion 54 of the lens holder 50 is omitted.

  Since the mounting operation of the coils 30 and 40 to the lens holder 50 is facilitated, the assembly operation of the laser radar scanning lens driving device 1 is easily performed. By assembling the laser radar scanning lens driving device 1 easily, the price of the laser radar scanning lens driving device 1 can be reduced.

  Instead of the coils 30 and 40 shown in FIG. 7, other forms of coils (not shown) may be used. For example, as the coils (30, 40), a coil formed by plating a circuit conductor on a substrate having a glass layer portion, a resin layer portion such as an epoxy resin layer portion, or the like may be used. Not shown). For example, a printed coil may be used as the coil. As such a coil, Asahi Kasei Electronics Co., Ltd. product: FP coil (trademark) etc. are mentioned, for example.

  By using such a coil, the coil is easily attached to the lens holder (50). By using a coil formed by plating a circuit conductor on the substrate, the coil can be easily attached to the lens holder (50). Since the mounting operation of the coil with respect to the lens holder (50) is facilitated, the assembly operation of the laser radar scanning lens driving device (1) is easily performed. By assembling the laser radar scanning lens driving device (1) easily, the price of the laser radar scanning lens driving device (1) can be reduced.

  The lens holder 50 is provided with a plurality of lightening portions 53a, 53b, 53c, 53d, 54a, 54b, 54c, 54d, 58a, and 58b that reduce the weight of the lens holder 50 (FIG. 6). The lens holder 50 is formed in a substantially rectangular flat plate shape with four corners cut out.

  The vertical thinned portion 53 a is a vertical substantially rectangular annular recess 53 a corresponding to the vertical coil mounting portion 53. Further, the vertical thinned portion 53b provided in the vertical coil mounting portion 53 is a vertical through-hole portion 53b. Further, the horizontal thinning portion 53c provided in the vertical coil mounting portion 53 is a horizontal through-hole portion 53c. Further, the vertical thinned portion 53 d is a substantially rectangular vertical through-hole portion 53 d corresponding to the vertical coil mounting portion 53.

  Further, the horizontal thinned portion 54 a is a horizontal substantially rectangular annular recess 54 a corresponding to the horizontal coil mounting portion 54. Further, the horizontal thinned portion 54b provided in the horizontal coil mounting portion 54 is a horizontal through-hole portion 54b. Further, the vertical thinned portion 54c provided in the horizontal coil mounting portion 54 is a vertical through-hole portion 54c. Further, the horizontal thinned portion 54 d is a substantially rectangular horizontal through-hole portion 54 d corresponding to the horizontal coil mounting portion 54.

  The thinned portion 58 a is a substantially rectangular horizontal recess 58 a surrounded by the four coil mounting portions 53, 53, 54, 54 of the substantially rectangular flat lens holder 50. The thinned portion 58b is a substantially rectangular horizontal recess 58b provided in the vicinity of the four corners of the lens holder 50 having a substantially rectangular flat plate shape.

  The lens holder 50 including the scanning lens 5 and the coils 30 and 40 has good movement by scraping off the lens holder 50. The lens holder 50 can be reduced in weight by providing the plurality of thinned portions 53a, 53b, 53c, 53d, 54a, 54b, 54c, 54d, 58a, and 58b in the lens holder 50. By using the lens holder 50 reduced in weight, when the lens holder 50 including the scanning lens 5 and the coils 30 and 40 is moved, the operation of the lens holder 50 becomes faster. Therefore, the laser radar scanning lens driving device 1 having excellent acceleration sensitivity is configured.

  The laser radar scanning lens driving device 1 (FIGS. 1 to 5) includes a plurality of thin metal suspension wires 63 and 64 that elastically support the lens holder 50. The suspension wires 63 and 64 are formed to constitute the drive unit 10 of the laser radar scanning lens drive device 1. The pair of suspension wires 63 are connected to the pair of coils 30 so as to be energized. The pair of suspension wires 64 are connected to the pair of coils 40 so as to be energized.

  The laser radar scanning lens driving device 1 having excellent acceleration sensitivity is configured by mounting the plurality of thin metal suspension wires 63 and 64 on the laser radar scanning lens driving device 1. Since the lens holder 50 including the coils 30 and 40 and the scanning lens 5 is elastically supported by an even number of thin metal suspension wires 63 and 64, the pair of vertical coils 30 and 30 or the pair of horizontal types. When a current is applied to one or both of the coils 40, 40, the lens holder 50 supported by the suspension wires 63, 64 is moved quickly.

  Further, when a current is passed through the coil 30, electricity is supplied to the coil 30 via the suspension wire 63. Since the coil 30 and the suspension wire 63 are connected so as to be energized, a special energizing member (not shown) for supplying electricity to the coil 30 is not necessary. Further, when a current is passed through the coil 40, electricity is supplied to the coil 40 via the suspension wire 64. Since the coil 40 and the suspension wire 64 are connected to be energized, a special energization member (not shown) for supplying electricity to the coil 40 is not necessary. Accordingly, the number of parts of the laser radar scanning lens driving apparatus 1 can be reduced. By reducing the number of parts of the laser radar scanning lens driving device 1, the price of the laser radar scanning lens driving device 1 can be reduced.

  The laser radar scanning lens driving device 1 (FIGS. 1 to 5) is provided with a substantially rectangular flat circuit board 70 to which the suspension wires 63 and 64 are connected so as to be energized, and a substantially rectangular flat circuit board 70. And an actuator frame 90 having a substantially rectangular box shape. In the housing portion 96 of the actuator frame 90 having a substantially rectangular box shape, the scanning lens 5, the lens holder 50, the coils 30, 40, and the magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, 22B. And is supposed to be located.

  If the laser radar scanning lens driving device 1 is configured as described above, the scanning lens 5 of the laser radar scanning lens driving device 1 is not interfered with by an external one (not shown) of the actuator frame 90. The actuator 30 is reliably moved by the coils 30 and 40 and the magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, and 22B mounted on the lens holder 50 in the accommodating portion 96 of the actuator frame 90.

The circuit board 70 and the suspension wire 63 are connected to be energized, the suspension wire 63 and the coil 30 are connected to be energized, and a current flows from the circuit board 70 to the coil 30 via the suspension wire 63. Thus, the lens holder 50 including the coil 30 and the scanning lens 5 is moved.

  In addition, the circuit board 70 and the suspension wire 64 are connected to be energized, the suspension wire 64 and the coil 40 are connected to be energized, and a current flows from the circuit board 70 to the coil 40 via the suspension wire 64. As a result, the lens holder 50 including the coil 40 and the scanning lens 5 is moved.

  The scanning lens 5 in the housing portion 96 of the actuator frame 90, the lens holder 50, the coils 30, 40, the magnets 11A, 11B, 12A, 12B, 21A, 21B, 22A, 22B, and the suspension wires 63, 64 is protected from the outside by an actuator frame 90 having a substantially rectangular box shape made of metal.

  The plurality of vertical magnets 11B and 12A (FIG. 1) are mounted on a pair of metal first yoke portions 91 that surround and support the plurality of vertical magnets 11B and 12A. The plurality of horizontal magnets 21B and 22A are mounted on a pair of metal second yoke portions 92 that surround and support the plurality of horizontal magnets 21B and 22A. The first yoke portion 91 and the second yoke portion 92 are formed integrally with a metal main body 95 constituting the frame 90 of the laser radar scanning lens driving device 1.

  The plurality of vertical magnets 11A and 12B (FIGS. 1 and 2) are attached to a metal yoke (not shown) that surrounds and supports the plurality of vertical magnets 11A and 12B. The plurality of horizontal magnets 21A, 22B are mounted on a metal yoke (not shown) that surrounds and supports the plurality of horizontal magnets 21A, 22B. Each metal yoke (not shown) is separate from the metal main body 95 constituting the frame 90 of the laser radar scanning lens driving device 1. Each metal yoke (not shown) is attached to a metal main body 95 constituting the frame 90 by using a fastener (not shown) such as a screw.

  Thereby, the influence of the magnetic force generated from the plurality of vertical magnets 11A, 11B, 12A, 12B is likely to be exerted on the vertical coils 30 for horizontal operation corresponding to the magnets 11A, 11B, 12A, 12B. Further, the influence of the magnetic force generated from the plurality of horizontal magnets 21A, 21B, 22A, 22B is likely to be exerted on the horizontal coil 40 for vertical operation corresponding to each magnet 21A, 21B, 22A, 22B.

  The magnets 11B and 12A are mounted on the metal first yoke portion 91, and the magnets 11B and 12A are surrounded by the metal first yoke portion 91, so that the magnetic force generated from the magnets 11B and 12A is a horizontal operation coil. It becomes easy to go to 30. Further, when the magnets 11A and 12B are mounted on a metal yoke (not shown) and the magnets 11A and 12B are surrounded by the metal yoke (not shown), the magnetic force generated from the magnets 11A and 12B is generated by a horizontal operation coil. It becomes easy to go to 30.

  Further, when the magnets 21B and 22A are mounted on the metal second yoke portion 92 and the magnets 21B and 22A are surrounded by the metal second yoke portion 92, the magnetic force generated from the magnets 21B and 22A can be controlled vertically. It becomes easy to turn to the coil 40 for use. Further, when the magnets 21A and 22B are mounted on a metal yoke (not shown) and the magnets 21A and 22B are surrounded by the metal yoke (not shown), the magnetic force generated from the magnets 21A and 22B is generated by a coil for vertical operation. It becomes easy to turn to 40.

Since most of the magnetic force generated from each of the vertical magnets 11A, 11B, 12A, 12B is directed to the vertical horizontal operation coil 30, an electric current is passed through the horizontal operation coil 30 to the horizontal operation coil 30. When an electromagnetic force is generated, the horizontal operation coil 30 receives a large driving force and is moved along the horizontal direction.

  In addition, since most of the magnetic force generated from the horizontal magnets 21A, 21B, 22A, and 22B is directed to the horizontal vertical operation coil 40, a current is passed through the vertical operation coil 40 to cause the vertical operation coil 40 to operate. When an electromagnetic force is generated, the vertical operation coil 40 receives a large driving force and is moved along the vertical direction.

  Accordingly, the laser radar scanning lens driving device 1 having excellent acceleration sensitivity is configured.

  Further, by using the yokes 91 and 92 and a yoke (not shown), the assembly and manufacturing work of the laser radar scanning lens driving device 1 can be easily performed. When the different pole facing magnets 11A, 11B, 12A, 12B are mounted on the frame 90 of the laser radar scanning lens driving device 1, a force attracting each other is generated in the different pole facing magnets 11A, 11B. Further, a force attracting each other is also generated in the different pole facing magnets 12A and 12B. Because of such attractive force, positioning and mounting work of the different pole facing magnets 11A, 11B, 12A, and 12B has been difficult.

  However, the different pole facing magnets 11B and 12A are mounted in advance on each yoke portion 91 by an adhesive (not shown) or the like, and the different pole facing magnets 11A and 12B are not shown on the yoke (not shown). In this state, the yoke 90 (not shown) is mounted on the frame 90, so that the different pole facing magnets 11A, 11B, 12A, 12B are easily positioned on the laser radar scanning lens driving device 1. Provided with.

  Further, when the different pole facing magnets 21A, 21B, 22A, 22B are mounted on the frame 90 of the laser radar scanning lens driving apparatus 1, a force attracting each other is generated on the different pole facing magnets 21A, 21B. Further, a force attracting each other is also generated in the different pole facing magnets 22A and 22B. Due to such attractive force, positioning and mounting work of the different pole facing magnets 21A, 21B, 22A, 22B has been difficult.

  However, the different pole facing magnets 21B and 22A are mounted in advance on each yoke portion 92 with an adhesive (not shown) or the like, and the different pole facing magnets 21A and 22B are not shown on the yoke. By attaching the yoke (not shown) to the frame 90 in advance, the different pole facing magnets 21A, 21B, 22A, 22B are easily positioned in the laser radar scanning lens driving device 1. Provided with.

  One provided with a pair of horizontal operation coils 30, 30 (FIGS. 1, 2, and 5), a pair of vertical operation coils 40, 40, one scanning lens 5, and one lens adjustment support member 6. The two substantially rectangular flat lens holders 50 are elastically supported by four metal suspension wires 63 and 64 attached in the vicinity of substantially four corners of the lens holder 50. Each of the metal suspension wires 63 and 64 is extended along a substantially horizontal direction. The substantially rectangular flat plate lens holder 50 is elastically supported by four metal suspension wires 63 and 64, whereby the vertical horizontal operation first surface side magnets 11A and 12B (FIG. 1) and the vertical It is equipped in a non-contact state between the second surface side magnets 11B and 12A for horizontal operation of the mold. Each of the metal suspension wires 63 and 64 is formed as a conductor and an elastic support.

Further, the substantially rectangular flat lens holder 50 is elastically supported by four metal suspension wires 63 and 64, whereby each horizontal type first operation side magnet 21A and 22B (FIG. 1), It is equipped in a non-contact state between the horizontal type second surface side magnets 21B and 22A for vertical operation. The substantially rectangular flat lens holder 50 is provided on the substantially front side of the scanning lens driving device 1 for laser radar.

  Solder material 107 (FIGS. 3 to 5) is used to solder the suspension wires 63 and 64 to the circuit conductors of the circuit board 70 so that they can be energized. The circuit board 70 is mounted on the rear side of the substantially rectangular box-shaped metal frame 90. The circuit board 70 is mounted on the substantially rear side of the laser radar scanning lens driving apparatus 1.

  The suspension wires 63 are inserted into the holes 83 of the synthetic resin damping support member 80 mounted on the rear side of the metal frame 90. A hole 83 of the damping support member 80 through which the suspension wire 63 is inserted is filled with a dumping material (not shown), which is rich in flexibility, a so-called dumping agent. The suspension wires 64 are inserted into the holes 84 of the synthetic resin damping support member 80 mounted on the rear side of the metal frame 90. A hole 84 of the damping support member 80 through which the suspension wire 64 is inserted is filled with a dumping material (not shown) rich in flexibility, so-called dumping agent. The damping support member 80 is formed using a synthetic resin material having excellent insulating properties. The damping support member 80 is formed based on an injection molding method that uses a synthetic resin material such as polycarbonate resin and is excellent in mass productivity.

  An emission lens (not shown) for irradiating an arbitrary target with laser light is disposed on the front side of the laser radar scanning lens driving device 1 including the metal casing 90.

  The laser radar scanning lens driving device 1 of the present invention is not limited to the illustrated one.

  For example, each vertical operation coil (40) and each vertical operation magnet (21A, 21B, 22A, 22B) are omitted without being equipped, and each horizontal operation coil (30) and each horizontal operation coil are omitted. The lens driving device (1) in which the lens (5) can move only along the horizontal direction may be configured by the magnets (11A, 11B, 12A, 12B).

  Further, for example, each horizontal operation coil (30) and each horizontal operation magnet (11A, 11B, 12A, 12B) are omitted without being provided, and each vertical operation coil (40) and each vertical operation coil (40) The lens driving device (1) in which the lens (5) can move only along the vertical direction may be configured by the operation magnets (21A, 21B, 22A, 22B).

  Also, for example, instead of the pair of second axial driving lateral coils 40, 40 that move the scanning lens 5 along the second axial direction D2, the scanning lens (5) is moved along the first axial direction D1. A pair of other first axial drive vertical coils (40, 40) may be used. Further, instead of the two pairs of second axial driving horizontal magnets 21A, 21B, 22A, 22B corresponding to the second axial driving horizontal coil 40, another first axial driving vertical coil (40). Two pairs of other first axial driving vertical magnets (21A, 21B, 22A, 22B) may be used.

  Further, for example, instead of the pair of first axial driving vertical coils 30 and 30 that move the scanning lens 5 along the first axial direction D1, the scanning lens (5) is moved along the second axial direction D2. A pair of other second axial driving horizontal coils (30, 30) to be moved may be used. Further, instead of the two pairs of first axial driving vertical magnets 11A, 11B, 12A, 12B corresponding to the first axial driving vertical coil 30, another second axial driving horizontal coil (30 Two pairs of other second axial driving horizontal magnets (11A, 11B, 12A, 12B) corresponding to) may be used.

  For example, a multipolar magnetized magnet that is magnetized with two or more poles may be used as the magnet.

  The present invention can be variously modified without departing from the scope of the invention.

It is a perspective view which shows the state partly notched in one Embodiment of the lens drive device for laser radars concerning this invention. It is a perspective view which similarly shows the lens drive device for laser radars. It is a top view which shows the lens drive device for laser radars. It is a side view which shows the lens drive device for laser radars. It is a rear view which shows the lens drive device for laser radars. It is a perspective view which shows the lens holder of the lens drive device for laser radars. It is a perspective view which shows the coil of the lens drive device for laser radars. It is a top view which shows the coil of the lens drive device for laser radars.

Explanation of symbols

1. Scanning lens driving device (lens driving device)
5 Scanning lens (lens)
6 Lens adjustment support member 10 Drive part 11A, 11B, 12A, 12B, 21A, 21B, 22A, 22B Magnet 11c, 11e, 12c, 12e, 21c, 21e, 22c, 22e N pole part (pole part)
11d, 11f, 12d, 12f, 21d, 21f, 22d, 22f S pole part (pole part)
30 First axial driving coil (coil)
31, 41 First side (one side)
31g, 41g First piece (side)
32, 42 Second side (two sides)
32g, 42g Second piece (side)
33g, 43g Third piece (side)
34g, 44g Fourth piece (side)
36,46 Electric wire (conductor)
40 Second axial driving coil (coil)
50 Lens holder 50c Center part 51 First surface (one surface)
52 Second side (two sides)
53, 54 Coil mounting portion 53a, 54a, 58a, 58b Recessed portion (thickening portion)
53b, 53c, 53d, 54b, 54c, 54d Through-hole part (thickening part)
55 Lens mounting part 56 Fixing hole 63, 64 Suspension wire (suspension part)
70 Circuit board (board)
75 Board body (main body)
80 Damping support member 83,84 hole 90 frame (housing)
91, 92 Yoke part (Yoke)
95 Main body 96 Housing portion 105, 107 Solder material D0 Optical axis direction D1 Left-right direction (first axial direction)
D2 Vertical direction (second axis direction)
D11 Front right direction (one direction)
D12 Front left direction (other direction)
D21 Front upper direction (one direction)
D22 Front lower direction (other direction)

Claims (19)

In a laser radar lens driving device for irradiating a target with laser light, detecting the laser light reflected and returned from the target, and measuring the distance to the target,
A lens through which the laser beam is transmitted;
A magnet for operating the lens;
A coil that allows the lens to be operated by generating an electromagnetic force in response to a magnetic field generated by the magnet and causing an electric current to flow.
A pair of the coils are arranged across the lens,
A lens driving device for a laser radar, wherein the magnet is arranged corresponding to one of the coils.   2. The lens driving device for a laser radar according to claim 1, wherein the coil is configured as an annular flat plate coil, and the magnet is disposed on one surface side of the annular flat plate coil. A plurality of the magnets are arranged for one coil,
The magnet has a positive electrode part and a negative electrode part which is a pole part opposite to the positive electrode part,
The plurality of magnets are
A counter-coil positive-side magnet in which the positive electrode portion is directed to the coil;
A negative coil side magnet with the negative electrode portion directed to the coil;
The coil is configured as an annular flat plate coil, and has a first surface and a second surface that is the surface opposite to the first surface;
On the first surface side of the annular flat plate coil, the counter-coil positive side magnet with the positive electrode portion facing the annular flat plate coil is disposed,
Corresponding to the counter-coil positive side magnet, on the second surface side of the annular flat plate coil, the counter-coil negative side magnet with the negative electrode portion facing the annular flat plate coil is disposed,
3. The lens driving device for a laser radar according to claim 1, wherein the annular flat plate coil is positioned between the counter-coil positive side magnet and the counter-coil negative side magnet. The plurality of magnets are
A first counter-coil positive-side magnet and a second counter-coil positive-side magnet in which the positive electrode portion is directed to the annular flat plate coil;
A first counter-coil negative-side magnet and a second counter-coil negative-side magnet in which the negative electrode portion is directed to the annular flat plate coil;
The annular flat coil is
A first side through which current flows along one direction;
A second side part through which current flows along the other direction opposite to the one direction,
On the first surface side of the annular flat plate coil, the first counter-coil positive side magnet with the positive electrode portion directed to the annular flat plate coil is disposed,
Corresponding to the first counter-coil positive-side magnet, the first counter-coil negative-side magnet with the negative electrode portion facing the annular flat-plate coil on the second surface side of the annular flat-plate coil Is placed,
Between the first counter-coil positive side magnet and the first counter-coil negative side magnet, the first side of the annular flat plate coil is located,
The second counter-coil positive-side magnet having the positive electrode portion facing the annular flat-plate coil on the second surface side of the annular flat-plate coil adjacent to the first counter-coil negative-side magnet Is placed,
Corresponding to the second counter-coil positive-side magnet, the second counter-coil negative-side magnet with the negative electrode portion facing the annular flat-plate coil on the first surface side of the annular flat-plate coil Is disposed adjacent to the first counter-coil positive side magnet,
4. The laser according to claim 3, wherein the second side portion of the annular flat plate coil is located between the second counter-coil positive magnet and the second counter-coil negative magnet. Radar lens drive device.   5. The laser radar lens driving device according to claim 3, wherein the counter-coil positive side magnet and the counter-coil negative side magnet are formed in the same shape. 6. When the coil is viewed in plan, the coil is configured in a substantially annular, substantially rectangular shape,
The pole portions of the magnet are arranged so that the direction of electromagnetic force acting on a pair of long sides constituting the substantially annular, substantially rectangular coil when the current is passed through the coil is the same direction. The lens driving device for a laser radar according to any one of claims 1 to 5, wherein: A direction substantially orthogonal to the optical axis of the laser beam transmitted through the lens is defined as a first axis direction,
The pair of or more coils are a pair of or more first axial driving coils that move the lens along the first axial direction,
7. The laser radar lens driving device according to claim 1, wherein the magnet is a first axial driving magnet corresponding to the first axial driving coil. A direction substantially orthogonal to the optical axis of the laser beam transmitted through the lens is defined as a first axis direction,
A direction substantially orthogonal to the optical axis and a direction substantially orthogonal to the first axis direction is defined as a second axis direction;
The pair of coils are
A pair of first axial drive coils for moving the lens along the first axial direction;
A pair of second axial drive coils for moving the lens along the second axial direction;
The plurality of magnets are
A first axial drive magnet corresponding to the pair of first axial drive coils;
The laser radar lens driving device according to claim 1, wherein the second axial driving magnet corresponds to the pair of second axial driving coils. Instead of a pair of the second axial drive coils that move the lens along the second axial direction, a pair of other first axial drive for moving the lens along the first axial direction Coils are used,
Instead of the second axial driving magnet corresponding to the pair of second axial driving coils, another first axial driving magnet corresponding to the pair of other first axial driving coils is provided. The lens driving device for a laser radar according to claim 8, wherein the lens driving device is used. A lens holder equipped with the coil and the lens;
10. The laser radar lens according to claim 1, wherein the lens holder is located in an effective magnetic field of the magnet, and the coil is located in the effective magnetic field of the magnet. 11. Drive device. The coil is attached to a lens holder equipped with the lens,
11. The laser radar lens driving device according to claim 1, wherein a coil mounting portion corresponding to the coil is provided in the lens holder.   12. The laser radar lens driving device according to claim 11, wherein the coil mounting portion is recessed in the lens holder, and the coil is fitted into the coil mounting portion. The lens holder is formed in a substantially flat plate shape,
The lens driving device for a laser radar according to any one of claims 10 to 12, wherein the coil is bonded to one surface side of the lens holder.   The lens driving device for a laser radar according to any one of claims 10 to 13, wherein a coil formed by winding a conductor is used as the coil.   The lens driving device for a laser radar according to any one of claims 10 to 13, wherein a coil formed by plating a conductor on a substrate is used as the coil.   The lens driving device for a laser radar according to any one of claims 10 to 15, wherein a lightening portion for reducing the weight of the lens holder is provided in the lens holder.   17. The lens driving device for a laser radar according to claim 10, further comprising a suspension portion that elastically supports the lens holder, wherein the suspension portion is connected to the coil so as to be energized. . A substrate to which the suspension unit is connected so as to be energized;
A housing to which the substrate is mounted,
The lens driving device for a laser radar according to claim 17, wherein the lens, the coil, and the magnet are located in the housing.   The lens driving device for a laser radar according to claim 1, wherein the magnet is attached to a yoke surrounding the magnet.

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