JP2021117461A - Lens drive and camera module - Google Patents

Abstract

An object of the present invention is to increase the degree of freedom in designing a lens driving device having a structure that mitigates impact when a lens holding member moves in the optical axis direction. A lens driving device (101) includes a magnet holding member (MH), a lens holding member (2) capable of holding a lens body, an upper leaf spring (16) provided to connect the magnet holding member (MH) and the lens holding member (2), and a lens holding member (2). A lower leaf spring 26, an axial driving mechanism MK for moving the lens holding member 2 in the optical axis direction with respect to the magnet holding member MH, and a cantilever portion TG1 that functions when the lens holding member 2 moves downward. , and a cantilever portion TG2 that functions when the lens holding member 2 moves upward. The cantilever portion TG<b>1 and the cantilever portion TG<b>2 are configured as part of the lower leaf spring 26 . [Selection drawing] Fig. 12

Description

The present disclosure relates to a lens driving device mounted on a portable device with a camera and the like, and a camera module including the lens driving device.

Conventionally, a lens driving device that uses an upper leaf spring and a lower leaf spring to support a lens holder (lens holding member) so that it can move in a direction parallel to the optical axis of the lens (hereinafter referred to as "optical axis direction"). Is known (see Patent Document 1). This lens driving device includes a forward movement restricting member that alleviates the impact when the lens holder moves upward (forward), and a backward movement restricting member that alleviates the impact when the lens holder moves downward (rearward). Is configured to have.

JP-A-2007-264020

However, in the above configuration, the designer considers the interference between the upper leaf spring and the forward movement restricting member and the interference between the lower leaf spring and the rear movement restricting member, and considers the interference between the upper leaf spring and the lower leaf spring, the lower leaf spring, and the front. It is necessary to design the movement control member and the rear movement control member. Therefore, the above configuration may limit the degree of freedom in designing the lens driving device.

Therefore, it is desirable to increase the degree of freedom in designing a lens driving device having a structure that cushions an impact when the lens holding member moves in the optical axis direction.

The lens driving device according to the embodiment of the present invention includes a support member, a lens holding member capable of holding a lens body, and an upper leaf spring and a lower leaf spring provided so as to connect the support member and the lens holding member. A drive mechanism that moves the lens holding member in the optical axis direction with respect to the support member, a first impact mitigation portion that functions when the lens holding member moves upward, and the lens holding member moving downward. In a lens driving device having a second impact mitigation unit that functions when moved, the first impact mitigation unit and the second impact mitigation unit are one of the upper leaf spring and the lower leaf spring. It is composed of springs.

The above-mentioned configuration can increase the degree of freedom in designing a lens driving device having a structure that cushions an impact when the lens holding member moves in the optical axis direction.

It is a perspective view of the lens driving device. It is an exploded perspective view of the lens driving device. It is an exploded perspective view of the lower member. It is an exploded perspective view of the movable side member. It is an exploded perspective view of the fixed side member. It is a perspective view of a movable coil, an upper leaf spring, a coil substrate, and a base member. It is a perspective view and a top view of a terminal member. It is a perspective view of the component of a movable side member. It is a top view of the component of a movable side member. It is sectional drawing of the component of the movable side member. It is a bottom view of the component of a movable side member. It is a bottom view of the lower leaf spring. It is a bottom view of another configuration example of a lower leaf spring. It is a perspective view of another configuration example of a lens driving device. It is an exploded perspective view of the lower member. It is a perspective view of the upper leaf spring. It is a figure of the upper leaf spring attached to a spacer member. It is a perspective view of the lens holding member to which the upper leaf spring is attached. It is a perspective view of the lens holding member to which the upper leaf spring is attached.

Hereinafter, the lens driving device 101 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the lens driving device 101. FIG. 2 is an exploded perspective view of the lens driving device 101, showing a state in which the case 4 is separated from the lower member LB. FIG. 3 is an exploded perspective view of the lower member LB, showing a state in which the movable side member MB is separated from the fixed side member RG. FIG. 4 is an exploded perspective view of the movable side member MB. FIG. 5 is an exploded perspective view of the fixed side member RG. FIG. 6 is a perspective view of the movable coil 3, the upper leaf spring 16, the coil substrate 17, and the base member 18, and shows the electrical connection relationship between them.

As shown in FIGS. 1 and 2, the lens driving device 101 includes a case 4 and a lower member LB that are a part of the fixed side member RG.

The case 4 is a cover member that covers the lower member LB. In the present embodiment, the case 4 is manufactured by subjecting a plate material made of a non-magnetic metal such as austenitic stainless steel to punching and drawing. Since it is made of non-magnetic metal, the case 4 does not have a magnetic adverse effect on the drive mechanism that utilizes electromagnetic force.

As shown in FIG. 2, the case 4 has a box-shaped outer shape that defines the storage portion 4s. The case 4 has a rectangular tubular outer wall portion 4A and a rectangular annular and flat upper surface portion 4B provided so as to be continuous with the upper end (Z1 side end) of the outer wall portion 4A. An opening is formed in the center of the upper surface portion 4B. The outer wall portion 4A includes a first side plate portion 4A1 to a fourth side plate portion 4A4. The first side plate portion 4A1 and the third side plate portion 4A3 face each other, and the second side plate portion 4A2 and the fourth side plate portion 4A4 face each other. Further, the second side plate portion 4A2 and the fourth side plate portion 4A4 extend perpendicularly to the first side plate portion 4A1 and the third side plate portion 4A3. That is, the first side plate portion 4A1 and the third side plate portion 4A3 extend perpendicularly to the second side plate portion 4A2 and the fourth side plate portion 4A4. Further, as shown in FIG. 1, the case 4 is joined to the base member 18 by an adhesive to form a housing together with the base member 18.

As shown in FIG. 3, the lower member LB includes a movable side member MB, a wire 8 which is a part of the fixed side member RG, a coil substrate 17, and a base member 18.

As shown in FIG. 4, the movable side member MB has a lens holding member 2 capable of holding a lens body (not shown) and a first drive for moving the lens holding member 2 along an optical axis JD related to the lens body. An axial drive mechanism MK as a mechanism, a leaf spring 6 that movably supports the lens holding member 2 along the optical axis JD, and a magnet as a supporting member to which the leaf spring 6 that supports the lens holding member 2 is fixed. The holding member MH and the spacer member SP are included. The lens body is, for example, a tubular lens barrel including at least one lens, and its central axis is configured to be along the optical axis JD.

As shown in FIG. 4, the axial drive mechanism MK includes a movable coil 3 attached to the lens holding member 2 and a magnet 5 arranged so as to face the movable coil 3 so as to face the movable coil 3. The axial drive mechanism MK can generate a driving force (thrust) by the current flowing through the movable coil 3 and the magnetic field generated by the magnet 5, and can move the lens holding member 2 up and down along the optical axis JD. In the present embodiment, the movable coil 3 is a winding type coil, and includes a winding portion 13 as a coil main body portion formed by being wound in an annular shape around the lens holding member 2. In FIG. 4, for the sake of clarity, the detailed winding state of the conductive wire rod whose surface is coated with the insulating material is omitted for the winding portion 13. The same applies to other figures illustrating the winding portion 13.

The magnet 5 includes a first magnet 5A to a fourth magnet 5D. In the present embodiment, each of the first magnet 5A to the fourth magnet 5D is a rectangular parallelepiped-shaped permanent magnet magnetized in two poles, and the inside (the side facing the optical axis JD) is magnetized in the S pole. , The outside is magnetized to the north pole. In FIG. 4, the portion magnetized at the north pole is shown by a diagonal line pattern. Each of the first magnet 5A to the fourth magnet 5D is arranged so as to face the movable coil 3 and separated from the movable coil 3. Each of the first magnet 5A to the fourth magnet 5D may be magnetized on the N pole on the inside (the side facing the optical axis JD) and on the S pole on the outside.

The magnet holding member MH is configured to hold the magnet 5. In the present embodiment, the magnet holding member MH is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). As shown in FIG. 4, the magnet holding member MH is a rectangular annular frame body when viewed from above, and the first magnet 5A to the fourth magnet 5D are arranged inside each of the four sides constituting the frame body. .. Specifically, all of the first magnet 5A to the fourth magnet 5D are fixed to the magnet holding member MH with an adhesive.

The leaf spring 6 is configured to movably support the lens holding member 2 with respect to the magnet holding member MH in a direction parallel to the optical axis JD. In the present embodiment, the leaf spring 6 is made of, for example, a metal plate mainly made of a copper alloy, a titanium-copper alloy (titanium copper), a copper nickel alloy (nickel tin copper), or the like. The leaf thickness of the leaf spring 6 is, for example, 20 to 70 μm. The leaf spring 6 includes an upper leaf spring 16 arranged on the Z1 side end surface of the magnet holding member MH and a lower leaf spring 26 arranged on the Z2 side end surface of the magnet holding member MH. The upper leaf spring 16 includes a first upper leaf spring 16A and a second upper leaf spring 16B separated from each other.

As shown in FIG. 4, the upper leaf spring 16 includes an inner portion 16i as a first fixing portion fixed to the lens holding member 2 and an outer portion 16e as a second fixing portion fixed to the magnet holding member MH. , A first elastic arm portion 16g located between the inner portion 16i and the outer portion 16e. FIG. 4 shows an inner portion 16iA, an outer portion 16eA, and two first elastic arm portions 16gA in the first upper leaf spring 16A, an inner portion 16iB, an outer portion 16eB, and two first elastic arms in the second upper leaf spring 16B. The elastic arm portion 16 gB is shown.

Further, the upper leaf spring 16 is provided so as to connect the wire 8 and the magnet holding member MH. Therefore, the outer portion 16e is arranged on the end face on the Z1 side of the magnet holding member MH. In the present embodiment, as shown in FIG. 6, the upper leaf spring 16 has a second elastic arm portion 16f located between the wire fixing portion 16c fixed to the wire 8 and the outer portion 16e and the wire fixing portion 16c. And further include. Specifically, as shown in FIG. 6, the first upper leaf spring 16A has one inner portion 16iA, one outer portion 16eA, two first elastic arm portions 16gA, and four second elastic arms. A portion 16fA and two wire fixing portions 16cA are included. Similarly, the second upper leaf spring 16B has one inner portion 16iB, one outer portion 16eB, two first elastic arm portions 16gB, four second elastic arm portions 16fB, and two wire fixing portions. Includes 16 cB and.

As shown in FIG. 6, the wire fixing portion 16c is formed with a through hole 16x through which the upper end portion of the wire 8 is inserted and fixed. Specifically, one of the two wire fixing portions 16cA of the first upper leaf spring 16A is formed with a through hole 16xA1 through which the upper end portion of the first wire 8A is inserted and fixed, and the two wires are fixed. The other of the portions 16cA is formed with a through hole 16xA2 through which the upper end portion of the second wire 8B is inserted and fixed. Similarly, one of the two wire fixing portions 16cB in the second upper leaf spring 16B is formed with a through hole 16xB1 through which the upper end portion of the third wire 8C is inserted and fixed, and the two wire fixing portions 16cB. On the other side of the above, a through hole 16xB2 is formed through which the upper end portion of the fourth wire 8D is inserted and fixed. In the present embodiment, the upper end portion of the wire 8 and the wire fixing portion 16c of the upper leaf spring 16 are joined by solder.

When the upper leaf spring 16 is incorporated into the lens driving device 101, the inner portion 16i is attached to the upper pedestal portion 12d (see FIG. 4) of the lens holding member 2. Then, the inner portion 16i is fixed to the upper surface (the surface on the Z1 side) of the lens holding member 2. The inner portion 16i is fixed by applying heat caulking or cold caulking to four round convex protrusions 12t protruding upward (Z1 direction) from the end surface on the subject side (Z1 side) of the upper pedestal portion 12d. It will be realized. The outer portion 16e is fixed to the upper surface (Z1 side surface) of the magnet holding member MH. The fixing of the outer portion 16e is realized by the adhesive applied to the magnet holding member MH.

As shown in FIG. 4, the first upper leaf spring 16A and the second upper leaf spring 16B have the same shape and are arranged so as to be rotationally symmetric with respect to the optical axis JD. Therefore, this configuration can reduce the number of parts of the lens driving device 101. Further, the upper leaf spring 16 can support the lens holding member 2 in the air in a well-balanced manner. Further, the upper leaf spring 16 does not adversely affect the weight balance of the movable side member MB supported by the four wires 8 (first wire 8A to fourth wire 8D).

As shown in FIG. 3, the spacer member SP is configured to be arranged on the upper side (Z1 side) of the upper leaf spring 16. That is, the upper leaf spring 16 is configured to be sandwiched between the spacer member SP and the magnet holding member MH. This is so that the upper end of the lens holding member 2 and the back surface (Z2 side surface) of the upper surface portion 4B of the case 4 are arranged apart from each other. That is, the lens holding member 2 can move in the Z1 direction by a desired distance.

As shown in FIG. 4, the lower leaf spring 26 is configured so that the inner shape is substantially circular. The lower leaf spring 26 has one inner portion 26i as a first fixing portion fixed to the lens holding member 2 with an adhesive and four outer portions as a second fixing portion fixed to the magnet holding member MH. Includes 26e and four elastic arm portions 26g located between the inner portion 26i and the outer portion 26e. The fixing of the inner portion 26i is realized by an adhesive applied to the lower end surface (Z2 side) of the lens holding member 2. The outer portion 26e is fixed by heat to four protrusions MHt (one of the four protrusions MHt is visible in FIG. 4) provided on the lower end surface (Z2 side) of the magnet holding member MH. It is realized by caulking or cold caulking.

The wire 8 is configured to movably support the movable side member MB in a direction non-parallel to the optical axis JD with respect to the fixed side member RG. In the present embodiment, the wire 8 is a suspension wire made of a metal material having conductivity and excellent elasticity such as a copper alloy, and includes the first wire 8A to the fourth wire 8D. The wire 8 movably supports the magnet holding member MH in the direction perpendicular to the optical axis JD with respect to the base member 18 as the fixed side member RG. As shown in FIG. 3, the lower end portion (end portion on the Z2 side) of each of the first wire 8A to the fourth wire 8D is fixed to the base member 18 with solder or a conductive adhesive, and the upper end portion (end portion (Z2 side end portion)). The end on the Z1 side) is fixed to the wire fixing portion 16c of the upper leaf spring 16 with solder, a conductive adhesive, or the like.

The conductive adhesive is, for example, an adhesive in which a conductive filler such as silver particles is dispersed in a synthetic resin. The conductive adhesive may be a thermosetting type, an ultraviolet curable type, or a moisture curable type.

With this configuration, the movable side member MB is movably supported by the first wire 8A to the fourth wire 8D in the X-axis direction and the Y-axis direction, which are the directions perpendicular to the optical axis JD.

The coil substrate 17 is a multilayer substrate and includes a fixed coil 9 constituting a radial drive mechanism RK as a second drive mechanism. In the present embodiment, the fixed coil 9 is a film type coil, and includes the first fixed coil 9A to the fourth fixed coil 9D as shown in FIG. The fixed coil 9 may be a winding type or a laminated type.

The radial drive mechanism RK is a first radial drive mechanism that moves the magnet holding member MH along the X-axis direction perpendicular to the optical axis JD, and the Y-axis direction perpendicular to each of the optical axes JD and X-axis. Includes a second radial drive mechanism that moves the magnet holding member MH along.

The first radial drive mechanism is arranged so as to be separated from the first fixed coil 9A and the third fixed coil 9C provided on the coil substrate 17 so as to face the first fixed coil 9A in the Z-axis direction. It includes a magnet 5A and a third magnet 5C arranged so as to face the third fixed coil 9C in the Z-axis direction.

The second radial drive mechanism is arranged so as to be separated from the second fixed coil 9B and the fourth fixed coil 9D provided on the coil substrate 17 so as to face the second fixed coil 9B in the Z-axis direction. It includes a magnet 5B and a fourth magnet 5D arranged so as to face the fourth fixed coil 9D in the Z-axis direction.

The lens driving device 101 having a substantially rectangular parallelepiped shape is mounted on, for example, a main substrate (not shown) on which an image sensor (not shown) is mounted. The camera module is composed of, for example, a main substrate, a lens driving device 101, a lens body mounted on the lens holding member 2, and an image sensor mounted on the main board so as to face the lens body. As shown in FIG. 6, the movable coil 3 is connected to a control device (control circuit) as a current supply source (not shown) via an upper leaf spring 16, a wire 8, a base member 18, and a main board. The fixed coil 9 is connected to a control device as a current supply source via a coil substrate 17, a base member 18, and a main substrate. Therefore, the upper leaf spring 16 and the wire 8 are made of a conductive material. When a current flows through the movable coil 3, the axial drive mechanism MK generates an electromagnetic force along a direction parallel to the optical axis JD. Similarly, when a current flows through the fixed coil 9, the radial drive mechanism RK generates an electromagnetic force along the direction perpendicular to the optical axis JD.

The lens driving device 101 utilizes an electromagnetic force along a direction parallel to the optical axis JD by the axial drive mechanism MK, and uses a lens along a direction parallel to the optical axis JD on the Z1 side (subject side) of the image sensor. By moving the holding member 2, the automatic focus adjustment function, which is one of the lens adjustment functions, is realized. Specifically, the lens driving device 101 moves the lens holding member 2 in a direction away from the image sensor to enable macro photography, and moves the lens holding member 2 in a direction approaching the image sensor to enable infinity photography. I have to.

The lens driving device 101 utilizes an electromagnetic force along the direction perpendicular to the optical axis JD by the radial drive mechanism RK, and uses a lens along the direction perpendicular to the optical axis JD on the Z1 side (subject side) of the image sensor. By moving the holding member 2, a shift function (camera shake correction function), which is another lens adjustment function, is realized.

Next, the details of the lens holding member 2 will be described. The lens holding member 2 is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). Specifically, as shown in FIG. 4, the lens holding member 2 has a tubular portion 12 formed so as to extend along the optical axis JD and projects radially outward from the outer peripheral surface of the tubular portion 12. Includes a flange portion (flange-shaped portion) 52. In the present embodiment, the lens body is fixed to the inner peripheral surface of the tubular portion 12 with an adhesive. Therefore, no thread groove is formed on the inner peripheral surface of the tubular portion 12. However, a thread groove may be provided on the inner peripheral surface of the tubular portion 12 so that the lens body is screwed. Further, the tubular portion 12 is provided with an upper pedestal portion 12d on the end surface on the subject side and a lower pedestal portion 12b (see FIG. 11B) on the end surface on the image sensor side. An inner portion 16i of the upper leaf spring 16 is attached to the upper pedestal portion 12d. Specifically, the inner portion 16iA of the first upper leaf spring 16A is placed and fixed on the X1 side portion and the Y2 side portion of the upper pedestal portion 12d, and the X2 side portion and Y1 of the upper pedestal portion 12d. The inner portion 16iB of the second upper leaf spring 16B is placed and fixed on the side portion. An inner portion 26i of the lower leaf spring 26 is attached to the lower pedestal portion 12b. In the present embodiment, the inner portion 26i of the lower leaf spring 26 is fixed to the lower pedestal portion 12b with an adhesive. Further, a coil support portion 12j for supporting the movable coil 3 is provided on the outer peripheral surface of the tubular portion 12.

As shown in FIG. 4, the lens holding member 2 further includes a square convex projecting portion 72 projecting upward (Z1 direction) from the end surface on the subject side (Z1 side). The protrusion 72 includes a first protrusion 72A and a second protrusion 72B.

The protruding portion 72 is configured so that both ends of the wire rod 33 constituting the movable coil 3 are wound and held. In the present embodiment, the end portion 33A on the winding start side of the wire rod 33 is wound around the first protruding portion 72A, and the end portion 33B on the winding end side of the wire rod 33 is wound around the second protruding portion 72B.

As shown in FIG. 6, the end portion 33A on the winding start side wound around the first protruding portion 72A is a connecting plate formed on the inner portion 16iB of the second upper leaf spring 16B by solder or a conductive adhesive or the like. It is connected to the unit 16hB so that it can be energized. Further, as shown in FIG. 6, the end portion 33B on the winding end side wound around the second protruding portion 72B is formed on the inner portion 16iA of the first upper leaf spring 16A by solder or a conductive adhesive or the like. It is connected to the connection plate portion 16hA so as to be energized.

As shown in FIG. 3, when the lens holding member 2 and the magnet holding member MH are connected by the leaf spring 6, the leaf spring 6 has the lens holding member 2 along the optical axis JD with respect to the magnet holding member MH. The lens holding member 2 is supported so as to be movable.

The upper leaf spring 16 also functions as a power feeding member for supplying an electric current to the movable coil 3. Specifically, as shown in FIG. 6, the connecting plate portion 16hA in the inner portion 16iA of the first upper leaf spring 16A is electrically connected to the end portion 33B on the winding end side of the wire rod 33 via solder. There is. Further, the wire fixing portion 16cA of the first upper leaf spring 16A is connected to the first wire 8A and the second wire 8B so as to be energized via solder. The first wire 8A and the second wire 8B are connected to the current supply source via the base member 18 so as to be energized. Similarly, the connecting plate portion 16hB in the inner portion 16iB of the second upper leaf spring 16B is electrically connected to the end portion 33A on the winding start side of the wire rod 33 via solder. Further, the wire fixing portion 16cB of the second upper leaf spring 16B is connected to the third wire 8C and the fourth wire 8D via solder so as to be energized. The third wire 8C and the fourth wire 8D are connected to the current supply source via the base member 18 so as to be energized. The lower leaf spring 26 may be made of a non-conductive material because no current flows through it. Further, the wire rod 33 and the connecting plate portion 16h may be joined with a conductive adhesive.

The base member 18 is formed by injection molding using a synthetic resin such as a liquid crystal polymer. In the present embodiment, as shown in FIG. 5, the base member 18 has a rectangular contour when viewed from above, and has an opening 18k in the center. The coil substrate 17 is fixed to the upper surface of the base member 18 which is the surface on the subject side (the surface on the Z1 side) by an adhesive. In the present embodiment, a recess 19 for accommodating the sensor 10 is formed on the upper surface of the base member 18. The sensor 10 includes a first sensor 10A and a second sensor 10B, and the recess 19 includes a first recess 19A and a second recess 19B. The sensor 10 is housed in the recess 19 in a state of being attached to the lower side (Z2 side) of the coil substrate 17. Specifically, the first sensor 10A is housed in the first recess 19A, and the second sensor 10B is housed in the second recess 19B.

The sensor 10 is configured to detect the position of the movable side member MB. In the present embodiment, the sensor 10 is composed of a giant magnetoresistive effect (GMR) element, and measures a resistance value that changes according to a change in the magnitude of the magnetic field from the magnet 5 received by the sensor 10. , It is configured to detect the position of the movable side member MB including the magnet 5. However, the sensor 10 is another magnetic resistance such as a semiconductor magnetoresistive (SMR) element, an anisotropic magnetoresistive (AMR) element, or a tunnel magnetoresistive (TMR) element. The element may be used to detect the position of the movable side member MB, or the Hall element may be used to detect the position of the movable side member MB.

As shown in FIG. 5, the coil substrate 17 is a multilayer substrate attached to the base member 18, and enables energization between each of the fixed coil 9 and the sensor 10 and the outside. Specifically, the coil substrate 17 includes not only the fixed coil 9 but also a solder land for mounting the sensor 10 and a wiring pattern or the like (hereinafter, referred to as “wiring pattern or the like”) not shown. It has been.

As shown in FIG. 7, a terminal member 7 formed of a metal plate containing a material such as copper, iron, or an alloy containing the same as a main component is embedded in the base member 18 by insert molding. FIG. 7A is a perspective view of the terminal member 7 embedded in the base member 18, and FIG. 7B is a top view of the terminal member 7. In the present embodiment, the terminal member 7 is provided on the first terminals T1 to 15th terminals T15 exposed on the side surface (Y1 side or Y2 side surface) of the base member 18 and on the upper surface (Z1 side surface) of the base member 18. The first conductive portion P1 to the 16th conductive portion P16 to be exposed and the 17th conductive portion P17 to be exposed on the side surface (the surface on the Y1 side) of the base member 18 are provided.

The first terminal T1 is connected to the first conductive portion P1. The first conductive portion P1 includes a conductive portion P1A and a conductive portion P1B. The lower end of the first wire 8A is fixed to the conductive portion P1A by soldering, and the lower end of the second wire 8B is fixed to the conductive portion P1B by soldering.

The second terminal T2 is connected to the second conductive portion P2. The second conductive portion P2 is connected to one end of the first fixed coil 9A via a wiring pattern or the like.

The third terminal T3 is connected to the third conductive portion P3. The third conductive portion P3 is connected to one end of the second fixed coil 9B via a wiring pattern or the like.

The fourth terminal T4 is connected to the fourth conductive portion P4. The fourth conductive portion P4 is connected to the first terminal of the four terminals in the second sensor 10B via a wiring pattern or the like.

The fifth terminal T5 is connected to the fifth conductive portion P5. The fifth conductive portion P5 is connected to the second terminal of the four terminals in the second sensor 10B via a wiring pattern or the like.

The sixth terminal T6 is connected to the sixth conductive portion P6. The sixth conductive portion P6 is connected to the third terminal of the four terminals in the second sensor 10B via a wiring pattern or the like.

The seventh terminal T7 is connected to the seventh conductive portion P7. The seventh conductive portion P7 is connected to the fourth terminal of the four terminals in the second sensor 10B via a wiring pattern or the like.

The eighth terminal T8 is connected to the eighth conductive portion P8. The eighth conductive portion P8 includes the conductive portion P8C and the conductive portion P8D. The lower end of the third wire 8C is fixed to the conductive portion P8C by soldering, and the lower end of the fourth wire 8D is fixed to the conductive portion P8D by soldering.

The ninth terminal T9 is connected to the ninth conductive portion P9. The ninth conductive portion P9 is connected to the first terminal of the four terminals in the first sensor 10A via a wiring pattern or the like.

The tenth terminal T10 is connected to the tenth conductive portion P10. The tenth conductive portion P10 is connected to the second terminal of the four terminals in the first sensor 10A via a wiring pattern or the like.

The eleventh terminal T11 is connected to the eleventh conductive portion P11. The eleventh conductive portion P11 is connected to the third terminal of the four terminals in the first sensor 10A via a wiring pattern or the like.

The twelfth terminal T12 is connected to the twelfth conductive portion P12. The twelfth conductive portion P12 is connected to the fourth terminal of the four terminals in the first sensor 10A via a wiring pattern or the like.

The thirteenth terminal T13 is connected to the thirteenth conductive portion P13. The thirteenth conductive portion P13 is connected to one end of the fourth fixed coil 9D via a wiring pattern or the like.

The 14th terminal T14 is connected to the 14th conductive portion P14. The 14th conductive portion P14 is connected to one end of the 3rd fixed coil 9C via a wiring pattern or the like.

The fifteenth conductive portion P15 is a conductive portion for connecting the first fixed coil 9A and the third fixed coil 9C in series, and includes the conductive portion P15A and the conductive portion P15C. The other end of the first fixed coil 9A is connected to the conductive portion P15A via a wiring pattern or the like, and the other end of the third fixed coil 9C is connected to the conductive portion P15C via a wiring pattern or the like.

The 16th conductive portion P16 is a conductive portion for connecting the second fixed coil 9B and the fourth fixed coil 9D in series, and includes the conductive portion P16B and the conductive portion P16D. The other end of the second fixed coil 9B is connected to the conductive portion P16B via a wiring pattern or the like, and the other end of the fourth fixed coil 9D is connected to the conductive portion P16D via a wiring pattern or the like.

The 15th terminal T15 is connected to the 17th conductive portion P17. The 17th conductive portion P17 is a conductive portion for grounding the case 4, and is connected to the 4th side plate portion 4A4 of the outer wall portion 4A of the case 4 by a conductive adhesive.

With the above configuration, the current related to the axial drive mechanism MK is, for example, from the first terminal T1 of the terminal member 7, the first wire 8A (second wire 8B), the first upper wire, as shown in FIGS. 6 and 7. Wire fixing portion 16cA of side leaf spring 16A, second elastic arm portion 16fA, outer portion 16eA, first elastic arm portion 16gA, inner portion 16iA, connection plate portion 16hA, end 33B on the winding end side of the movable coil 3, winding Part 13, end 33A on the winding start side, connection plate part 16hB of the second upper leaf spring 16B, inner part 16iB, first elastic arm part 16gB, outer part 16eB, second elastic arm part 16fB, wire fixing part 16cB, Then, it flows through the third wire 8C (fourth wire 8D) to the eighth terminal T8 of the terminal member 7, or flows in the opposite direction.

The currents related to the first radial drive mechanism are, for example, from the second terminal T2 of the terminal member 7, the second conductive portion P2, the first fixed coil 9A, the fifteenth conductive portion P15 (conductive portion P15A and the conductive portion P15C), and the first. 3 Flows through the fixed coil 9C and the 14th conductive portion P14 to the 14th terminal T14, or flows in the opposite direction. Further, the current related to the second radial drive mechanism is, for example, from the third terminal T3 of the terminal member 7, the third conductive portion P3, the second fixed coil 9B, and the 16th conductive portion P16 (conductive portion P16B and conductive portion P16D). , The fourth fixed coil 9D, and the thirteenth conductive portion P13, the current flows to the thirteenth terminal T13, or vice versa. The conductive portion and the fixed coil are connected by a solder land (not shown) formed on the coil substrate 17, a wiring pattern, or the like.

Next, with reference to FIGS. 8 to 10, the connection between the lens holding member 2 and the magnet holding member MH by the upper leaf spring 16 will be described. FIG. 8 is a perspective view of the spacer member SP, the upper leaf spring 16, the lens holding member 2, and the magnet holding member MH, which are components of the movable side member MB. FIG. 9 is a top view of the components of the movable side member MB. FIG. 10 is a cross-sectional view of a component of the movable side member MB. Specifically, FIG. 10 (A) shows a cross section in a virtual plane perpendicular to the XY plane including the alternate long and short dash line L1 shown in FIG. 9 (E), and FIG. 10 (B) is shown in FIG. 9 (E). The cross section in the virtual plane perpendicular to the XY plane including the alternate long and short dash line L2 is shown.

As shown in FIGS. 9A and 9B, the lens holding member 2 is capable of contacting the magnet holding member MH inside the magnet holding member MH with the movable coil 3 attached. Be placed. FIG. 9B shows the lens holding member 2 with a dot pattern attached for clarity.

Specifically, the magnet holding member MH has recesses 23d that open inward and upward at each of the four corners of the rectangular annular frame when viewed from above. The lens holding member 2 has four projecting portions 2p that project outward from each of the four corner portions of the rectangular annular tubular portion 12 when viewed from above. The four recesses 23d of the magnet holding member MH are configured to face the four protrusions 2p of the lens holding member 2 in a non-contact manner when the lens holding member 2 is supported by the leaf spring 6.

As shown in FIG. 9C, the upper leaf spring 16 is arranged on the upper surface of each of the lens holding member 2 and the magnet holding member MH. FIG. 9C shows the upper leaf spring 16 with a dot pattern attached for clarity. Specifically, as shown in FIGS. 9 (B) and 9 (C), the inner portion 16i of the upper leaf spring 16 is mounted on the upper pedestal portion 12d of the lens holding member 2, and the upper leaf spring 16 is mounted on the upper pedestal portion 12d. The outer portion 16e is placed on the end face ES1 of the magnet holding member MH.

As shown in FIG. 9C, the four protrusions 12t protruding upward from the upper pedestal portion 12d are inserted and crimped into the through holes H1 (see FIG. 8) formed in the inner portion 16i. .. As a result, the inner portion 16i of the upper leaf spring 16 is fixed to the lens holding member 2. Then, as shown in FIG. 9D, the connecting plate portion 16h of the upper leaf spring 16 and the wire rod 33 wound around the protruding portion 72 are joined by the solder SD. FIG. 9D shows the solder SD with a dot pattern attached for clarity.

As shown in FIG. 9C, the eight protrusions 25t protruding upward from the end face ES1 are inserted into the eight through holes H2 (see FIG. 8) formed in the outer portion 16e.

As shown in FIG. 9D, the spacer member SP is arranged on the upper surface of the magnet holding member MH with the outer portion 16e of the upper leaf spring 16 sandwiched between the spacer member SP and the magnet holding member MH. NS. FIG. 9D shows the spacer member SP with a dot pattern attached for clarification.

As shown in FIG. 9D, the eight protrusions 25t protruding upward from the end face ES1 are inserted into the eight through holes H3 (see FIG. 8) formed in the spacer member SP. The upper leaf spring 16 and the spacer member SP are arranged so that the through hole H2 and the through hole H3 overlap each other in the top view. Then, as shown in FIG. 9E, the adhesive GL1 is applied to the tip of the protrusion 25t inserted through the through hole H3. FIG. 9E shows the adhesive GL1 with a dot pattern for clarity. As a result, the outer portion 16e of the upper leaf spring 16 and the spacer member SP are integrally fixed to the magnet holding member MH.

In this way, the upper leaf spring 16 is fixed to each of the lens holding member 2 and the magnet holding member MH.

The protrusion 2p of the lens holding member 2 and the recess 23d of the magnet holding member MH are configured to limit the excessive movement of the lens holding member 2 in the optical axis direction. That is, the protruding portion 2p of the lens holding member 2 and the recess 23d of the magnet holding member MH are configured to function as a first mechanical stopper that limits excessive movement of the lens holding member 2 in the optical axis direction.

Specifically, the projecting portion 2p of the lens holding member 2 has an abutting portion 2c projecting upward as shown in FIGS. 10A and 10B. The contact portion 2c is configured to come into contact with the lower surface USF of the outer portion 16e of the upper leaf spring 16 when the lens holding member 2 moves upward by a predetermined first ascending distance. FIG. 8 shows a portion CT in which the contact portion 2c contacts on the lower surface USF of the outer portion 16e in a dot pattern.

Further, the recess 23d of the magnet holding member MH has a contact portion 24c protruding upward as shown in FIGS. 10 (A) and 10 (B). The contact portion 24c is configured to come into contact with the lower surface BSF of the protruding portion 2p when the lens holding member 2 moves downward by a predetermined first descending distance.

Further, the protruding portion 2p of the lens holding member 2 and the recess 23d of the magnet holding member MH are configured to limit the excessive movement of the lens holding member 2 in the direction perpendicular to the optical axis direction. That is, the protruding portion 2p of the lens holding member 2 and the recess 23d of the magnet holding member MH also function as a second mechanical stopper that limits the excessive movement of the lens holding member 2 in the direction perpendicular to the optical axis direction. It is configured.

Specifically, as shown in FIG. 10A, the protruding portion 2p of the lens holding member 2 is far from the recess 23d of the magnet holding member MH when the lens holding member 2 moves outward by a predetermined distance. It is configured to be in contact with the position surface DSF.

Further, the protruding portion 2p of the lens holding member 2 and the recess 23d of the magnet holding member MH are configured to limit the excessive rotation of the lens holding member 2 around the optical axis JD. That is, the protruding portion 2p of the lens holding member 2 and the recess 23d of the magnet holding member MH are configured to function as a third mechanical stopper that restricts excessive rotation of the lens holding member 2 around the optical axis JD. There is.

Specifically, as shown in FIG. 10B, the protruding portion 2p of the lens holding member 2 is a magnet holding member MH when the lens holding member 2 is rotated to the right by a predetermined angle around the optical axis JD. It is configured to come into contact with the right surface RSF of the recess 23d of the lens. Similarly, as shown in FIG. 10B, the protrusion 2p of the lens holding member 2 is a recess of the magnet holding member MH when the lens holding member 2 is rotated to the left by a predetermined angle around the optical axis JD. It is configured to come into contact with the left side LSF of 23d.

Next, with reference to FIGS. 11 and 12, the connection between the lens holding member 2 and the magnet holding member MH by the lower leaf spring 26 will be described. FIG. 11 is a bottom view of the magnet holding member MH, the lens holding member 2, the lower leaf spring 26, and the magnet 5, which are the constituent elements of the movable side member MB. FIG. 12 is a bottom view of the lower leaf spring 26. Specifically, FIG. 12A is a bottom view of the lower leaf spring 26 as a single unit. FIG. 12B is a bottom view of the lower leaf spring 26 connected to each of the lens holding member 2 and the magnet holding member MH, and corresponds to the portion R1 surrounded by the broken line in FIG. 11C. is doing.

As shown in FIGS. 11A and 11B, the lens holding member 2 is capable of contacting the magnet holding member MH inside the magnet holding member MH with the movable coil 3 attached. Be placed. FIG. 11B shows the lens holding member 2 with a dot pattern attached for clarity.

As shown in FIG. 11C, the lower leaf spring 26 is arranged on the lower surface of each of the lens holding member 2 and the magnet holding member MH. FIG. 11C shows the lower leaf spring 26 with a dot pattern attached for clarity.

As shown in FIG. 12A, the lower leaf spring 26 has an inner portion 26i as a first fixing portion fixed to the lens holding member 2 and 4 as a second fixing portion fixed to the magnet holding member MH. Includes one outer portion 26e and four elastic arm portions 26g located between the inner portion 26i and the outer portion 26e. Specifically, the inner portion 26i includes four connecting portions 26c. Two adjacent connecting portions 26c are connected to each other by a connecting portion 26p. Further, the connecting portion 26c is connected to the outer portion 26e by the corresponding elastic arm portion 26g. A through hole H4 is formed in each of the four outer portions 26e, and a cantilever beam portion TG1 extending in a direction away from the through hole H4 is formed. A through hole H5 is formed in each of the four connecting portions 26c, and a cantilever beam portion TG2 extending in a direction away from the through hole H5 is formed.

Specifically, as shown in FIGS. 11B and 11C, the inner portion 26i of the lower leaf spring 26 is mounted on the lower pedestal portion 12b of the lens holding member 2, and the lower leaf spring 26 The outer portion 26e of the magnet holding member MH is placed on the end face ES2 of the magnet holding member MH.

As shown in FIG. 11C, the four protrusions MHt protruding downward from the end face ES2 are inserted into the four through holes H4 (see FIG. 12A) formed in the outer portion 26e, and are inserted into the four through holes H4 (see FIG. 12A). , Squeezed. As a result, the outer portion 26e of the lower leaf spring 26 is fixed to the magnet holding member MH.

As shown in FIG. 11C, the inner portion 26i of the lower leaf spring 26 is formed in the through hole H5 (see FIG. 12A) formed in the connecting portion 26c and the lower pedestal portion 12b. The recess RS1 (see FIG. 11B) is arranged so as to overlap with each other in the optical axis direction.

In the present embodiment, each of the four through holes H5 is composed of a combination of the five through holes as shown in FIG. 12 (A). Specifically, each through hole H5 has a circular central through hole arranged in the center and four partial annular rings arranged outside the central through hole along the circumferential direction of one concentric circle. It is composed of a combination with a through hole.

Then, as shown in FIG. 11D, the adhesive GL2 is applied to the portion of the lower surface (the surface on the Z2 side) of the connecting portion 26c of the lower leaf spring 26 where the through hole H5 is formed. FIG. 11D shows the adhesive GL2 with a dot pattern for clarity. As a result, the inner portion 26i of the lower leaf spring 26 is fixed to the lens holding member 2.

In this way, the lower leaf spring 26 is fixed to each of the lens holding member 2 and the magnet holding member MH.

As shown in FIG. 11 (E), the magnet 5 is attached to the magnet holding member MH by an adhesive (not shown). FIG. 11 (E) shows the magnet 5 with a dot pattern attached for clarity.

The cantilever beam portion TG1 extending from the outer portion 26e of the lower leaf spring 26 is an example of an impact mitigating portion that functions when the lens holding member 2 moves downward (Z2 direction) on the image sensor side, and is shown in FIG. As shown in B), it has a contact portion CP1 and an elastic portion EP1.

The contact portion CP1 has a contact portion 12c (FIG. 11) protruding downward from the end face ES3 on the Z2 side of the lens holding member 2 in a state where the lower leaf spring 26 is fixed to each of the lens holding member 2 and the magnet holding member MH (FIG. 11). It is arranged so as to overlap with (B) in the optical axis direction. In the present embodiment, the end face ES3 is located above the end face of the lower pedestal portion 12b (see FIG. 11B). With this arrangement, when the lens holding member 2 moves to the Z2 side by a predetermined second descending distance, the contact portion CP1 comes into contact with the contact portion 12c, and the elastic portion EP1 elastically deforms to generate a restoring force. , Further movement of the lens holding member 2 to the Z2 side is suppressed.

In the present embodiment, the second descending distance is the first descending distance of the lens holding member 2 when the contact portion 24c of the magnet holding member MH contacts the lower surface BSF of the protruding portion 2p of the lens holding member 2. It is set as a smaller distance. This is because the cantilever beam portion TG1 functions as an impact mitigation portion before the first mechanical stopper functions.

The cantilever beam portion TG2 extending from the connecting portion 26c of the lower leaf spring 26 is an example of an impact mitigating portion that functions when the lens holding member 2 moves upward (Z1 direction) on the subject side, and is an example of FIG. 12 (B). ), It has a contact portion CP2 and an elastic portion EP2.

The contact portion CP2 has a contact portion MHc (FIG. 11) protruding downward from the end surface ES4 on the Z2 side of the magnet holding member MH in a state where the lower leaf spring 26 is fixed to each of the lens holding member 2 and the magnet holding member MH. It is arranged so as to overlap with (A) in the optical axis direction. In this embodiment, the end face ES4 is located above the end face ES2 (see FIG. 11B). With this arrangement, when the lens holding member 2 moves to the Z1 side by a predetermined second rising distance, the contact portion CP2 comes into contact with the contact portion MHc, and the elastic portion EP2 elastically deforms to generate a restoring force. , Further movement of the lens holding member 2 to the Z1 side is suppressed.

In the present embodiment, the second ascending distance is the ascending of the lens holding member 2 when the contact portion 2c formed on the protruding portion 2p of the lens holding member 2 comes into contact with the lower surface USF of the outer portion 16e of the upper leaf spring 16. It is set as a distance smaller than the first ascending distance, which is the distance. This is because the cantilever beam portion TG2 functions as an impact mitigating portion before the first mechanical stopper functions.

In the example shown in FIG. 12, the protrusion amounts of the contact portion 12c and the contact portion MHc are set so that the second descending distance and the second ascending distance are the same. However, the protrusion amounts of the contact portion 12c and the contact portion MHc may be set so that the second descending distance and the second ascending distance are different from each other.

Next, with reference to FIG. 13, the connection between the lens holding member 2 and the magnet holding member MH by the lower leaf spring 26X, which is another configuration example of the lower leaf spring 26, will be described. FIG. 13 is a bottom view of the lower leaf spring 26X and corresponds to FIG. Specifically, FIG. 13A is a bottom view of the lower leaf spring 26X as a single unit, and corresponds to FIG. 12A. FIG. 13B is a bottom view of the lower leaf spring 26X connected to each of the lens holding member 2 and the magnet holding member MH, and corresponds to FIG. 12B.

As shown in FIG. 13A, the lower leaf spring 26X has an inner portion 26i as a first fixing portion fixed to the lens holding member 2 and 4 as a second fixing portion fixed to the magnet holding member MH. Includes one outer portion 26e and four elastic arm portions 26g located between the inner portion 26i and the outer portion 26e. Specifically, the inner portion 26i includes four connecting portions 26c. Two adjacent connecting portions 26c are connected to each other by a connecting portion 26p. Further, the connecting portion 26c is connected to the outer portion 26e by the corresponding elastic arm portion 26g. Through holes H4 are formed in each of the four outer portions 26e. Each of the four elastic arm portions 26g is formed with a cantilever beam portion TG3 extending in the direction toward the inner portion 26i. A through hole H5 is formed in each of the four connecting portions 26c, and a cantilever beam portion TG4 extending in a direction away from the through hole H5 is formed.

The lower leaf spring 26X differs from the lower leaf spring 26 having a cantilever TG1 extending from the outer portion 26e in that it mainly has a cantilever TG3 extending from the elastic arm 26g, but in other respects. , Has the same configuration as the lower leaf spring 26.

Specifically, the inner portion 26i of the lower leaf spring 26X is mounted on the lower pedestal portion 12b of the lens holding member 2, and the outer portion 26e of the lower leaf spring 26X is mounted on the end surface ES2 of the magnet holding member MH. Will be done.

The cantilever beam portion TG3 extending from the elastic arm portion 26g of the lower leaf spring 26X is an example of an impact mitigating portion that functions when the lens holding member 2 moves downward (Z2 direction), and is shown in FIG. 13 (B). As described above, it has a contact portion CP3 and an elastic portion EP3.

The contact portion CP3 has an optical axis and a contact portion 12c protruding downward from the end face ES5 on the Z2 side of the lens holding member 2 in a state where the lower leaf spring 26X is fixed to each of the lens holding member 2 and the magnet holding member MH. They are arranged so as to overlap in the direction. In the present embodiment, the end face ES5 is located above the end face of the lower pedestal portion 12b (see FIG. 11B). With this arrangement, when the lens holding member 2 moves to the Z2 side by a predetermined third descending distance, the contact portion CP3 comes into contact with the contact portion 12c, and the elastic portion EP3 elastically deforms to generate a restoring force. , Further movement of the lens holding member 2 to the Z2 side is suppressed.

In the present embodiment, the third descending distance is the descending distance of the lens holding member 2 when the contact portion 24c formed in the recess 23d of the magnet holding member MH contacts the lower surface BSF of the protruding portion 2p of the lens holding member 2. It is set as a distance smaller than the first descending distance. This is because the cantilever beam portion TG3 functions as an impact mitigation portion before the first mechanical stopper functions.

The cantilever beam portion TG4 extending from the connecting portion 26c of the lower leaf spring 26X is an example of an impact mitigating portion that functions when the lens holding member 2 moves upward (Z1 direction), as shown in FIG. 13 (B). Has a contact portion CP4 and an elastic portion EP4.

The contact portion CP4 has a contact portion MHc and an optical axis protruding downward from the end face ES4 on the Z2 side of the magnet holding member MH in a state where the lower leaf spring 26 is fixed to each of the lens holding member 2 and the magnet holding member MH. They are arranged so as to overlap in the direction. In this embodiment, the end face ES4 is located above the end face ES2 (see FIG. 11B). With this arrangement, when the lens holding member 2 moves to the Z1 side by a predetermined third rising distance, the contact portion CP4 comes into contact with the contact portion MHc, and the elastic portion EP4 elastically deforms to generate a restoring force. , Further movement of the lens holding member 2 to the Z1 side is suppressed.

In the present embodiment, the third ascending distance is the ascending of the lens holding member 2 when the contact portion 2c formed on the protruding portion 2p of the lens holding member 2 comes into contact with the lower surface USF of the outer portion 16e of the upper leaf spring 16. It is set as a distance smaller than the first ascending distance, which is the distance. This is because the cantilever beam portion TG4 functions as an impact mitigating portion before the first mechanical stopper functions.

In the example shown in FIG. 13, the protrusion amounts of the contact portion 12c and the contact portion MHc are set so that the third descending distance and the third ascending distance are the same. However, the protrusion amounts of the contact portion 12c and the contact portion MHc may be set so that the third descending distance and the third ascending distance are different from each other.

Further, in the present embodiment, a through hole H6 is formed in the elastic portion EP4. The through hole H6 is for reducing the spring constant of the elastic portion EP4. The through hole H6 may have a slit shape. By forming the through hole H6, the designer can realize a desired spring constant even when the design length of the elastic portion EP4 cannot be increased.

Next, the lens driving device 101A, which is another configuration example of the lens driving device 101, will be described with reference to FIGS. 14 and 15. FIG. 14 includes an exploded perspective view and a completed perspective view of the lens driving device 101A. The exploded perspective view of the lens driving device 101A shown in FIG. 14 shows a state in which the case 4 is separated from the lower member LB. FIG. 15 is an exploded perspective view of the lower member LB. The lower member LB of the lens driving device 101A includes a spacer member SP, an upper leaf spring 16, a lens holding member 2, a movable coil 3, a magnet 5, a lower leaf spring 26, a terminal member 7X, and a base member 18.

The lens drive device 101A mainly includes an axial drive mechanism MK and a radial drive mechanism RK in that it is a lens drive device including an axial drive mechanism MK but not a radial drive mechanism. It is different from the lens driving device 101.

The movable coil 3 in the lens driving device 101A has the same configuration as the movable coil 3 in the lens driving device 101. The same applies to the case 4 and the magnet 5.

As shown in FIG. 15, the upper leaf spring 16 has an inner portion 16i as a first fixing portion fixed to the lens holding member 2 and an outer portion 16i as a second fixing portion fixed to the spacer member SP as a support member. Includes a portion 16e and a first elastic arm portion 16g located between the inner portion 16i and the outer portion 16e. In the lens driving device 101A, the upper leaf spring 16 does not need to function as a feeding member, and is therefore configured as a single member that is not separated into two. The upper leaf spring 16 may be made of a non-conductive material because no current flows through it.

The spacer member SP is configured to hold the upper leaf spring 16 so that the space required when the upper leaf spring 16 elastically deforms vertically along the optical axis direction can be secured above and below the upper leaf spring 16. There is. In the example shown in FIG. 15, the spacer member SP includes an upper spacer member USP arranged above the upper leaf spring 16 and a lower spacer member LSP arranged below the upper leaf spring 16. That is, the upper leaf spring 16 is configured such that the outer portion 16e is sandwiched between the upper spacer member USP and the lower spacer member LSP.

As shown in FIG. 15, the lower leaf spring 26 has an inner portion 26i as a first fixing portion fixed to the lens holding member 2 and an outer portion as a second fixing portion fixed to the base member 18 as a support member. Includes a portion 26e and an elastic arm portion 26g located between the inner portion 26i and the outer portion 26e. In the lens driving device 101A, the lower leaf spring 26 is configured to function as a feeding member for supplying an electric current to the movable coil 3. Therefore, the lower leaf spring 26 includes a first lower leaf spring 26A and a second lower leaf spring 26B separated from each other. FIG. 15 shows an inner portion 26iA, an outer portion 26eA, and two elastic arm portions 26gA in the first lower leaf spring 26A, and an inner portion 26iB, an outer portion 26eB, and two elastic arm portions 26gB in the second lower leaf spring 26B. And.

The lens holding member 2 is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). Specifically, as shown in FIG. 15, the lens holding member 2 has a tubular portion 12 formed so as to extend along the optical axis JD and projects radially outward from the outer peripheral surface of the tubular portion 12. Includes a flange portion (flange-shaped portion) 52. In the example shown in FIG. 15, a screw groove is provided on the inner peripheral surface of the tubular portion 12 so that the lens body is screwed.

Further, the tubular portion 12 is provided with an upper pedestal portion 12d on the end surface on the subject side and a lower pedestal portion 12b (invisible in FIG. 15) on the end surface on the image sensor side. An inner portion 16i of the upper leaf spring 16 is attached to the upper pedestal portion 12d. An inner portion 26i of the lower leaf spring 26 is attached to the lower pedestal portion 12b. In the example shown in FIG. 15, the inner portion 26i of the lower leaf spring 26 is fixed to the lower pedestal portion 12b by caulking, as will be described later. A coil support portion 12j for supporting the movable coil 3 is provided on the outer peripheral surface of the tubular portion 12.

As shown in FIG. 15, the lens holding member 2 further includes a square convex projecting portion 72 projecting downward (Z2 direction) from the end surface on the image sensor side (Z2 side). The protrusion 72 includes a first protrusion 72A and a second protrusion 72B (not visible in FIG. 15).

The protruding portion 72 is configured so that both ends of the wire rod 33 constituting the movable coil 3 are wound and held. In the example shown in FIG. 15, the end portion 33A on the winding start side of the wire rod 33 is wound around the first protrusion 72A, and the end portion 33B on the winding end side of the wire rod 33 is wound around the second protrusion 72B. ..

As shown by the broken line in FIG. 15, the end portion 33A on the winding start side to be wound around the first protruding portion 72A is connected to the inner portion 26iA of the first lower leaf spring 26A by solder or a conductive adhesive or the like. It is connected to the plate portion 26hA so as to be energized. Further, as shown by the broken line in FIG. 15, the end portion 33B on the winding end side wound around the second protruding portion 72B is formed on the inner portion 26iB of the second lower leaf spring 26B by solder or a conductive adhesive or the like. It is connected to the connecting plate portion 26hB so as to be energized.

The lens holding member 2 further includes four projecting portions 2q projecting upward (Z1 direction) from the end surface on the subject side (Z1 side). The protrusion 2q is configured to come into contact with the back surface (Z2 side surface) of the upper surface portion 4B of the case 4 when the lens holding member 2 moves upward by a predetermined fourth ascending distance. That is, the protruding portion 2q of the lens holding member 2 and the upper surface portion 4B of the case 4 are configured to function as mechanical stoppers that limit the excessive movement of the lens holding member 2 upward in the optical axis direction.

The base member 18 is formed by injection molding using a synthetic resin such as a liquid crystal polymer. In the example shown in FIG. 15, the base member 18 has a rectangular contour when viewed from above, and has an opening 18k in the center. A terminal member 7X formed of a metal plate containing a material such as copper, iron, or an alloy containing the same as a main component is embedded in the base member 18 by insert molding. FIG. 15 shows the terminal member 7X actually embedded in the base member 18 in a state of being separated from the base member 18 for clarification.

The terminal member 7X includes a first terminal member 7A, a second terminal member 7B, and a third terminal member 7C. The first terminal member 7A includes a terminal portion 7AT protruding downward from the lower surface of the base member 18 and a conductor portion 7AP exposed on the upper surface of the base member 18. Similarly, the second terminal member 7B includes a terminal portion 7BT protruding downward from the lower surface of the base member 18 and a conductor portion 7BP exposed on the upper surface of the base member 18. The third terminal member 7C is a member that functions as a grounding terminal, and is configured to come into contact with the lower end portion of the outer wall portion 4A that constitutes the case 4.

As shown by the broken line in FIG. 15, the conductor portion 7AP of the first terminal member 7A is electrically connected to the outer portion 26eA of the first lower leaf spring 26A by welding or a conductive adhesive or the like. Further, as shown by the broken line in FIG. 15, the conductor portion 7BP of the second terminal member 7B is electrically connected to the outer portion 26eB of the second lower leaf spring 26B by welding or a conductive adhesive or the like.

The base member 18 further includes four projecting portions 18q projecting upward (Z1 direction) from the end surface on the subject side (Z1 side). The protrusion 18q is configured to come into contact with the end surface of the lens holding member 2 on the image sensor side (Z2 side) when the lens holding member 2 moves downward by a predetermined fourth descending distance. That is, the protruding portion 18q of the base member 18 and the end surface of the lens holding member 2 on the image sensor side (Z2 side) function as a mechanical stopper that limits the excessive movement of the lens holding member 2 downward in the optical axis direction. It is configured as follows.

When the lower leaf spring 26 is incorporated into the lens driving device 101A, the outer portion 26e is fixed to the base member 18. As shown in FIG. 15, the outer portion 26e is fixed by heat-caulking or cooling the six round convex protrusions 18t protruding upward (Z1 direction) from the end surface of the base member 18 on the subject side (Z1 side). It is realized by applying a squeeze. Specifically, the protrusion 18t is inserted into and crimped through the through hole H7 formed in the outer portion 26e. The inner portion 26i is fixed to the lens holding member 2. The inner portion 26i is fixed by six round convex protrusions 2t (FIG. 15) protruding downward (Z2 direction) from the end surface (lower pedestal portion 12b) on the image sensor side (Z2 side) of the lens holding member 2. It is realized by applying hot or cold caulking to (invisible). Specifically, the protrusion 2t is inserted into and crimped through the through hole H8 formed in the inner portion 26i.

In the example shown in FIG. 15, the lower leaf spring 26 is configured to function as a power feeding member for supplying an electric current to the movable coil 3. Specifically, as shown by the broken line in FIG. 15, the connecting plate portion 26hA in the inner portion 26iA of the first lower leaf spring 26A is connected to the end portion 33A on the winding start side of the wire rod 33 via solder so as to be energized. Has been done. Further, the outer portion 26eA of the first lower leaf spring 26A is connected to the conductor portion 7AP of the first terminal member 7A via a laser welded portion so as to be energized. The conductor portion 7AP is connected to the current supply source via the terminal portion 7AT so as to be energized. Similarly, the connecting plate portion 26hB in the inner portion 26iB of the second lower leaf spring 26B is electrically connected to the end portion 33B on the winding end side of the wire rod 33 via solder. Further, the outer portion 26eB of the second lower leaf spring 26B is connected to the conductor portion 7BP of the second terminal member 7B via a laser welded portion so as to be energized. The conductor portion 7BP is connected to the current supply source via the terminal portion 7BT so as to be energized.

Next, the connection between the upper leaf spring 16 and other components in the lens driving device 101A will be described with reference to FIGS. 16 and 17. FIG. 16A is a perspective view of the upper leaf spring 16 attached to the lens holding member 2. In FIG. 16A, the movable coil 3 is attached to the lens holding member 2. FIG. 16B is a perspective view of the upper leaf spring 16 sandwiched between the upper spacer member USP and the lower spacer member LSP. FIG. 17A is a side view of the upper leaf spring 16 sandwiched between the upper spacer member USP and the lower spacer member LSP. FIG. 17B is a top view of the lower spacer member LSP arranged below the upper leaf spring 16. FIG. 17C is a bottom view of the upper spacer member USP arranged above the upper leaf spring 16. 17 (B) and 17 (C) show the outline of the upper leaf spring 16 with a broken line.

As shown in FIG. 16A, the inner portion 16i of the upper leaf spring 16 is attached to the upper pedestal portion 12d (see FIG. 15) of the lens holding member 2. Then, the inner portion 16i is fixed to the upper surface (the surface on the Z1 side) of the lens holding member 2. Specifically, the upper leaf spring 16 is adhesively fixed to the lens holding member 2 by the adhesive GL3 applied to each of the four cutouts CT1 (see FIG. 15) formed in the inner portion 16i. At this time, in the upper leaf spring 16, the positions of the four notched portions CT1 formed in the inner portion 16i are the four formed on the end faces of the upper pedestal portion 12d of the lens holding member 2 on the subject side (Z1 side). It is arranged so as to correspond to the position of the recess RS2 (see FIG. 15).

As shown in FIG. 16B, the outer portion 16e of the upper leaf spring 16 is sandwiched between the upper spacer member USP and the lower spacer member LSP. Specifically, as shown in FIG. 17B, the lower spacer member LSP has eight raised portion LPTs that rise upward from the end face on the Z1 side. As shown in FIG. 17C, the upper spacer member USP has eight raised portion UPTs that rise downward from the end face on the Z2 side. Then, as shown in FIG. 17A, the outer portion 16e of the upper leaf spring 16 is sandwiched between the eight raised portions UPT in the upper spacer member USP and the eight raised portions LPT in the lower spacer member LSP. There is.

The upper leaf spring 16 further includes a double-sided beam portion TG5 extending outward from the inner portion 26i. The double-sided beam portion TG5 is an example of an impact mitigating portion that functions when the lens holding member 2 moves in the optical axis direction, and has a contact portion CP5 and an elastic portion EP5 as shown in FIG. 16 (A).

As shown in FIG. 17B, the contact portion CP5 is above the end face ES6 on the Z1 side of the lower spacer member LSP in a state where the upper leaf spring 16 is fixed to each of the lens holding member 2 and the spacer member SP. It is arranged so as to overlap with the contact portion 50 protruding from the lens in the optical axis direction. In the present embodiment, the end face ES6 is located below the end face of the raised portion LPT. With this arrangement, when the lens holding member 2 moves to the Z2 side by a predetermined fifth descending distance, the lower surface of the contact portion CP5 comes into contact with the contact portion 50, and the elastic portion EP5 elastically deforms to exert a restoring force. It is generated to suppress further movement of the lens holding member 2 toward the Z2 side.

In the present embodiment, the fifth descending distance is smaller than the fourth descending distance, which is the descending distance of the lens holding member 2 when the end surface of the lens holding member 2 on the Z2 side comes into contact with the protruding portion 18q of the base member 18. Is set as. This is because the double-sided beam portion TG5 functions as an impact mitigating portion before the mechanical stopper functions.

Similarly, as shown in FIG. 17C, the contact portion CP5 has the end face ES7 on the Z2 side of the upper spacer member USP in a state where the upper leaf spring 16 is fixed to each of the lens holding member 2 and the spacer member SP. It is arranged so as to overlap with the contact portion 51 protruding downward from the lens in the optical axis direction. In the present embodiment, the end face ES7 is located above the end face of the raised portion UPT. With this arrangement, when the lens holding member 2 moves to the Z1 side by a predetermined fifth ascending distance, the upper surface of the contact portion CP5 comes into contact with the contact portion 51, and the elastic portion EP5 elastically deforms to exert a restoring force. It is generated to suppress further movement of the lens holding member 2 toward the Z1 side.

In the present embodiment, the fifth ascending distance is the ascending distance of the lens holding member 2 when the back surface (Z2 side surface) of the upper surface portion 4B of the case 4 comes into contact with the protruding portion 2q of the lens holding member 2. It is set as a distance smaller than the climbing distance. This is because the double-sided beam portion TG5 functions as an impact mitigating portion before the mechanical stopper functions.

In the example shown in FIG. 17, the four contact portions 50 formed on the end surface ES6 of the lower spacer member LSP sandwich the contact portion CP5 of the double-sided beam portion TG5 in the optical axis direction, and the upper spacer member USP. It is arranged so as to face the four contact portions 51 formed on the end face ES7. However, the contact portion 50 may be arranged so as not to face the contact portion 51. That is, the contact portion 50 may be arranged so as not to overlap with the contact portion 51 in the optical axis direction. Further, the number of contact portions 50 that come into contact with one double-sided beam portion TG5 may be one or three or more. The same applies to the number of contact portions 51 that come into contact with one double-sided beam portion TG5. Further, the number of abutting portions 50 may be different from the number of abutting portions 51. Further, in the example shown in FIG. 17, the protrusion amounts of the contact portion 50 and the contact portion 51 are set so that the fifth descending distance and the fifth ascending distance are the same. However, the protrusion amounts of the contact portion 50 and the contact portion 51 may be set so that the fifth descending distance and the fifth ascending distance are different from each other.

Further, the double-sided beam portion TG5 as the impact mitigating portion may be replaced with the cantilever portion. Specifically, one double-sided beam portion TG5 may be replaced by one cantilever portion, or may be replaced by a pair of cantilever portions (two cantilever portions). It may be replaced with the above cantilever portion. The spring constant of the double-sided beam portion TG5 is larger than the spring constant of the cantilever portion having the same size and shape. Further, the spring constant of the double-sided beam portion TG5 is typically larger as the length along the double-sided beam portion TG5 from the root of the elastic portion EP5 to the portion where the contact portion 50 contacts is smaller. The designer can determine the configuration of the impact mitigation unit based on these facts.

Next, with reference to FIGS. 18 and 19, a double-sided beam portion TG6 as an impact mitigating portion included in the upper leaf spring 16X, which is another configuration example of the upper leaf spring 16, will be described. FIG. 18 is a perspective view of the lens holding member 2 to which the upper leaf spring 16X is attached, and corresponds to FIG. 16 (A). In FIG. 18, the movable coil 3 is wound around the lens holding member 2. FIG. 19 is a perspective view of the lens holding member 2 to which the upper leaf spring 16X is attached, and corresponds to the portion R2 surrounded by the broken line in FIG. Specifically, FIG. 19A shows the lens holding member 2 before the upper leaf spring 16X is attached, and FIG. 19B shows the lens holding member 2 after the upper leaf spring 16X is attached. FIG. 19C shows the lens holding member 2 after the upper leaf spring 16X is attached, the adhesive GL3 is applied, and the damper material GE is attached.

The upper leaf spring 16X is different from the upper leaf spring 16 shown in FIG. 16 (A) in that the damper material GE is attached, but has the same structure as the upper leaf spring 16 in other respects. .. Therefore, in the following, the explanation of the common part will be omitted, and the difference part will be explained in detail.

As shown in FIG. 18, the upper leaf spring 16X includes a double-sided beam portion TG6 extending outward from the inner portion 16i. The double-sided beam portion TG6 is an example of an impact mitigating portion that functions when the lens holding member 2 moves in the optical axis direction. Have. The contact portion CP6 has the same configuration as the contact portion CP5 shown in FIG. 16 (A), and functions in the same manner as the contact portion CP5. Similarly, the elastic portion EP6 has the same configuration as the elastic portion EP5 shown in FIG. 16 (A), and functions in the same manner as the elastic portion EP5.

The convex portion PR is a portion that protrudes from the contact portion CP6 toward the inner portion 16i. In the example shown in FIG. 18, the convex portion PR is connected to the inner portion 16i via the damper material GE and is connected to the lens holding member 2 via the damper material GE.

The damper material GE is a member for accelerating the damping of the vibration of the lens holding member 2 caused by the double-sided beam portion TG6 as the impact absorbing portion. In the example shown in FIG. 18, the damper material GE is a gelled adhesive, and is arranged so as to connect the lens holding member 2 and the double-sided beam portion TG6.

Specifically, since the double-sided beam portion TG6 is a part of the upper leaf spring 16X as an elastic body, after the contact portion CP6 comes into contact with the contact portion 50 or the contact portion 51 at the time of a drop impact. It bounces off and causes the lens holding member 2 to vibrate up and down. The damper material GE can accelerate the damping of the vibration of the lens holding member 2.

The inner portion 16i of the upper leaf spring 16X is attached to the upper pedestal portion 12d of the lens holding member 2 as shown in FIGS. 19A and 19B. Then, the inner portion 16i is fixed to the upper surface (the surface on the Z1 side) of the lens holding member 2. Specifically, the upper leaf spring 16X is adhesively fixed to the lens holding member 2 by the adhesive GL3 applied to each of the notch portions CT1 formed in the inner portion 16i.

As shown in FIG. 19B, the double-sided beam portion TG6 of the upper leaf spring 16X is arranged so as to project outward from the upper pedestal portion 12d of the lens holding member 2. Further, the convex portion PR of the double-sided beam portion TG6 is arranged so as to project toward each of the cutout portions CT2 formed in the inner portion 16i. At this time, in the upper leaf spring 16X, the position of the cutout portion CT2 formed in the inner portion 16i corresponds to the position of the recess RS3 formed in the end surface of the lens holding member 2 on the subject side (Z1 side). Be placed.

As shown in FIG. 19C, the damper material GE is arranged so as to connect the convex portion PR, the inner portion 16i, and the lens holding member 2.

With this configuration, the damper material GE can accelerate the damping of the vibration of the lens holding member 2 caused by the double-sided beam portion TG6 as the impact mitigating portion.

As described above, in the lens driving device 101, for example, as shown in FIG. 12, the magnet holding member MH as a support member, the lens holding member 2 capable of holding the lens body, the magnet holding member MH, and the lens holding member 2 The upper leaf spring 16 and the lower leaf spring 26 provided so as to connect the lenses, the axial drive mechanism MK which is a drive mechanism for moving the lens holding member 2 in the optical axis direction with respect to the magnet holding member MH, and the lens holding. A cantilever beam portion TG2 as a first impact mitigation portion that functions when the member 2 moves upward, and a cantilever beam portion TG1 as a second impact mitigation portion that functions when the lens holding member 2 moves downward. And have. The cantilever beam portion TG1 and the cantilever beam portion TG2 are composed of a lower leaf spring 26 which is one of the upper leaf spring 16 and the lower leaf spring 26. That is, the cantilever beam portion TG1 and the cantilever beam portion TG2 are integrated as a part of the lower leaf spring 26.

Alternatively, as shown in FIG. 15, for example, the lens driving device 101A includes a spacer member SP and a base member 18 as support members, a lens holding member 2 capable of holding a lens body, and a spacer member SP and a lens holding member 2. The upper leaf spring 16 provided to connect the lens holding member 26 and the lower leaf spring 26 provided to connect the base member 18 and the lens holding member 2, and the lens holding member 2 with respect to the spacer member SP and the base member 18. The axial drive mechanism MK, which is a drive mechanism for moving the lens in the optical axis direction, and the lens holding member 2 as a first impact mitigation unit that functions when the lens holding member 2 moves upward, and the lens holding member 2 moves downward. It has a double-sided beam portion TG5 as a second impact mitigation portion that functions at the time. The double-sided beam portion TG5 is composed of an upper leaf spring 16 which is one of the upper leaf spring 16 and the lower leaf spring 26. That is, the double-sided beam portion TG5 is integrated as a part of the upper leaf spring 16.

The above-described configuration in which the shock absorbing portion is realized by one of the upper leaf spring 16 and the lower leaf spring 26 is a structure that cushions the impact when the lens holding member 2 moves in the optical axis direction. It is possible to increase the degree of freedom in designing each of the lens driving devices 101 and 101A having the above. For example, the above configuration can ensure a high degree of freedom in designing the other leaf spring of the upper leaf spring 16 and the lower leaf spring 26. This is because it is not necessary to provide an impact absorbing portion on the other leaf spring. Further, in the above configuration, since the impact mitigation portion is realized by one of the upper leaf spring 16 and the lower leaf spring 26, the number of parts can be reduced. This is because the impact absorbing portion is formed as a part of one of the leaf springs, that is, the impact absorbing portion does not need to be formed as a single component. Further, in the above configuration, the first impact mitigation portion and the second impact mitigation portion interfere with each other so that the impact mitigation portion is realized by one of the upper leaf spring 16 and the lower leaf spring 26. Can be prevented.

The lens driving devices 101 and 101A are preferably configured such that the first impact mitigation portion has a first elastic portion and the second impact mitigation portion has a second elastic portion. For example, as shown in FIG. 12, in the lens driving device 101, the cantilever beam portion TG2 as the first impact mitigation portion has the elastic portion EP2 as the first elastic portion, and the piece as the second impact mitigation portion. The beam portion TG1 is configured to have an elastic portion EP1 as a second elastic portion. Alternatively, as shown in FIG. 16, in the lens driving device 101A, the double-sided beam portion TG5 that functions as both the first impact mitigation portion and the second impact mitigation portion is an elastic portion as the first elastic portion and the second elastic portion. It is configured to have EP5.

With this configuration, the lens driving devices 101 and 101A can elastically absorb the kinetic energy of the lens holding member 2 moving in the optical axis direction by the shock absorbing portion, so that the lens holding member 2 moves excessively fast in the optical axis direction. Can be suppressed.

Through holes may be formed in at least one of the first elastic portion and the second elastic portion. For example, as shown in FIG. 13, a through hole H6 is formed in the elastic portion EP4 of the cantilever beam portion TG4, which is the first elastic portion of the first impact mitigation portion that functions when the lens holding member 2 moves upward. Has been done.

This configuration ensures that the desired spring constant is achieved, for example, even when the design length of the elastic portion EP4 is limited by some factor. This is because the designer can adjust the spring constant of the cantilever beam portion TG4 by changing the shape and size of the through hole H6.

One of the upper leaf spring 16 and the lower leaf spring 26, that is, the leaf spring including the first impact mitigation portion and the second impact mitigation portion, is preferably a first portion fixed to the support member and the first portion. It has a second portion fixed to the lens holding member 2 and an elastic arm portion located between the first portion and the second portion. In this case, one of the first impact mitigation section and the second impact mitigation section is connected to the first portion, and the other of the first impact mitigation section and the second impact mitigation section is connected to the second portion. For example, in the lens driving device 101 shown in FIG. 12, the lower leaf spring 26 has an outer portion 26e as a first portion fixed to the magnet holding member MH as a support member and a second portion fixed to the lens holding member 2. The inner portion 26i and the elastic arm portion 26g located between the outer portion 26e and the inner portion 26i are provided. In this case, the cantilever beam portion TG2 as the first impact mitigation portion is connected to the inner portion 26i as the second portion, and the cantilever beam portion TG1 as the second impact mitigation portion is the outer side as the first portion. It is connected to the part 26e. Alternatively, when the first impact mitigation portion and the second impact mitigation portion are composed of the upper leaf spring 16, the upper leaf spring 16 serves as the first portion fixed to the magnet holding member MH as the support member. It has an outer portion 16e, an inner portion 16i as a second portion fixed to the lens holding member 2, and a first elastic arm portion 16g located between the outer portion 16e and the inner portion 16i. In this case, the cantilever portion as the first impact mitigation portion is connected to the outer portion 16e as the first portion, and the cantilever beam portion as the second impact mitigation portion is the inner portion 16i as the second portion. It is connected to.

In this configuration, since the first impact mitigation portion and the second impact mitigation portion are formed as a part of one leaf spring, the first impact mitigation portion and the second impact mitigation portion in the optical axis direction in the initial state of the lens driving device 101 are formed. 2 Variations in the positions (heights) of the impact mitigation portions are suppressed. The initial state of the lens driving device 101 means, for example, a state in which the lens driving device 101 is arranged so that the optical axis direction is the vertical direction and no current is supplied to the driving mechanism. Therefore, this configuration can improve the accuracy of the position (height) of the first impact mitigation portion in the optical axis direction in the initial state, so that the lens holding member 2 rises when the first impact mitigation portion functions. The variation in distance can be suppressed. Further, since this configuration can improve the accuracy of the position (height) of the second impact mitigation portion in the optical axis direction in the initial state, the lens holding member 2 is lowered when the second impact mitigation portion functions. The variation in distance can be suppressed. Therefore, this configuration can more reliably alleviate the impact when the lens holding member 2 moves in the optical axis direction.

At least one of the first impact mitigation portion and the second impact mitigation portion may be connected to the elastic arm portion. For example, in the lens driving device 101 shown in FIG. 13, the cantilever beam portion TG3 as the second impact mitigation portion is connected to the elastic arm portion 26g of the lower leaf spring 26. That is, in this configuration, a part of the elastic arm portion 26 g is used as the impact mitigation portion. Therefore, for example, this configuration can relax restrictions on the arrangement of the impact mitigation unit, and can improve the space efficiency of the space inside the housing of the lens driving device 101. This is because in this configuration, the second impact mitigation portion does not necessarily have to extend from the outer portion 26e of the lower leaf spring 26.

The support member preferably has a first contact portion facing the upper surface of the impact mitigation portion and a second contact portion facing the lower surface of the impact mitigation portion. For example, in the lens driving device 101A shown in FIG. 15, the double-sided beam portion TG5 as the impact mitigating portion having the first impact mitigating portion and the second impact mitigating portion is formed on the upper leaf spring 16. The upper spacer member USP as a support member has a contact portion 51 as a first contact portion facing the upper surface of the double-sided beam portion TG5, and the lower spacer member LSP as a support member has both sides. It has a contact portion 50 as a second contact portion facing the lower surface of the beam portion TG5.

In this configuration, since the double-sided beam portion TG5 functions as both the first impact mitigation portion and the second impact mitigation portion, the first impact mitigation portion and the second impact mitigation portion need to be arranged at different positions. do not have. Therefore, this configuration can increase the degree of freedom in design regarding the position where the impact mitigation portion is arranged.

The impact mitigation portion may be formed in the shape of a double-sided beam. For example, as shown in FIG. 15, the impact mitigation portion may be composed of the double-sided beam portion TG5 which is a part of the upper leaf spring 16. In this case, the upper leaf spring 16 is arranged so as to extend along the first side plate portion 4A1 of the outer wall portion 4A constituting the case 4 (arranged on the X1 side when viewed from the optical axis JD). It has a TG5 and a double-sided beam portion TG5 arranged so as to extend along the third side plate portion 4A3 (arranged on the X2 side when viewed from the optical axis JD).

In this configuration, since the double-sided beam portion TG5 is used, the spring constant is larger than that in the case where the cantilever portion having the same size and shape is used. Therefore, this configuration can cope with a situation where the spring constant becomes too small when the cantilever portion is used and a desired spring constant cannot be realized.

The support member may have a pair of spacer members SP. In this case, one of the upper leaf spring 16 and the lower leaf spring 26 including the impact absorbing portion is sandwiched by the pair of spacer members SP. For example, in the lens driving device 101A shown in FIG. 15, the support member includes a combination of the upper spacer member USP and the lower spacer member LSP. The outer portion 16e of the upper leaf spring 16 including the double-sided beam portion TG5 as the impact mitigation portion is sandwiched between the upper spacer member USP and the lower spacer member LSP.

In this configuration, the maximum amount of movement of the lens holding member 2 in the optical axis direction can be adjusted by changing the thickness of the spacer member SP. Specifically, the maximum amount of upward movement of the lens holding member 2 in the optical axis direction is adjusted by changing the thickness of the upper spacer member USP, and the maximum downward movement of the lens holding member 2 in the optical axis direction is adjusted. The amount can be adjusted by changing the thickness of the lower spacer member LSP.

Desirably, three or more first impact mitigation portions are arranged around the optical axis JD at intervals in the circumferential direction. Similarly, three or more second impact mitigation sections are preferably arranged around the optical axis at intervals in the circumferential direction. For example, as shown in FIG. 12A, four cantilever beam portions TG2 as the first impact mitigation portion are arranged around the optical axis JD at intervals of about 90 degrees in the circumferential direction. Similarly, as shown in FIG. 12A, four cantilever beam portions TG1 as the second impact mitigation portion are arranged around the optical axis JD at intervals of about 90 degrees in the circumferential direction.

With this configuration, in the lens driving device 101, for example, when the lens holding member 2 moves upward and the cantilever beam portion TG2 comes into contact with the magnet holding member MH, the central axis of the lens body moves with respect to the optical axis JD. It can be prevented from tilting. This is because the lens driving device 101 can bring the four cantilever beam portions TG1 into contact with the magnet holding member MH at the same time. For example, three first impact mitigation portions may be arranged around the optical axis JD at intervals of about 120 degrees in the circumferential direction, and six may be arranged around the optical axis JD at intervals of about 60 degrees in the circumferential direction. It may be arranged. The same applies to the second impact mitigation section.

Desirably, the lens driving device 101 has a first stopper portion that comes into contact with the lens holding member 2 when the lens holding member 2 moves upward by a first distance, and the lens holding member 2 moves downward by a second distance. It has a second stopper portion that comes into contact with the lens holding member 2 at the time. In this case, the first impact mitigation unit functions when the lens holding member 2 moves upward by a distance smaller than the first distance, and the second impact mitigation unit functions by the lens holding member 2 by a distance smaller than the second distance. It is configured to work when moved downwards. For example, in the lens driving device 101 shown in FIG. 10, the outer portion 16e of the upper leaf spring 16 as the first stopper portion that comes into contact with the lens holding member 2 when the lens holding member 2 moves upward by the first ascending distance. It has a lower surface USF and a contact portion 24c as a second stopper portion that comes into contact with the lens holding member 2 when the lens holding member 2 moves downward by the first descending distance. In this case, the cantilever beam portion TG2 as the first impact mitigation portion comes into contact with the magnet holding member MH when the lens holding member 2 moves upward by a second ascending distance smaller than the first ascending distance, and the second impact The cantilever beam portion TG1 as a relaxation portion is configured to come into contact with the lens holding member 2 when the lens holding member 2 moves downward by a second descending distance smaller than the first descending distance.

In this configuration, the movement of the lens holding member 2 in the optical axis direction is restricted by the impact mitigation portion before being restricted by the mechanical stopper. Therefore, this configuration can prevent the collision force between the lens holding member 2 and the member (upper leaf spring 16 or magnet holding member MH) constituting the mechanical stopper from becoming excessively large. Further, since this configuration can suppress the sudden movement of the lens holding member 2 in the section until the lens holding member 2 and the member constituting the mechanical stopper come into contact with each other, the upper leaf spring 16 and the lower leaf spring 26 are plastically deformed. Can be prevented more reliably.

The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications, substitutions, and the like can be applied to the above-described embodiments without departing from the scope of the present invention. In addition, each of the features described with reference to the above-described embodiments may be appropriately combined as long as there is no technical contradiction.

For example, in the lens driving device 101 described above, the lower end of the wire 8 is fixed to the terminal member 7 embedded in the base member 18. However, the lower end of the wire 8 may be fixed to the base member 18 made of synthetic resin and may be electrically connected to the conductive pattern formed on the base member 18. Alternatively, the lower end of the wire 8 may be fixed to a fixed-side member such as a flexible printed circuit board or a coil substrate laminated on the base member 18.

2 ... Lens holding member 2c ... Contact part 2p, 2q ... Protruding part 3 ... Movable coil 4 ... Case 4A ... Outer wall part 4A1 ... First side plate part 4A2 ...・ 2nd side plate part 4A3 ・ ・ ・ 3rd side plate part 4A4 ・ ・ ・ 4th side plate part 4B ・ ・ ・ Top surface part 4s ・ ・ ・ Storage part 5 ・ ・ ・ Magnet 5A ・ ・ ・ 1st magnet 5B ・ ・ ・ No. 2 magnet 5C ... 3rd magnet 5D ... 4th magnet 6 ... leaf spring 7, 7X ... terminal member 8 ... wire 8A ... 1st wire 8B ... 2nd wire 8C ... 3rd wire 8D ... 4th wire 9 ... Fixed coil 9A ... 1st fixed coil 9B ... 2nd fixed coil 9C ... 3rd fixed coil 9D ... 4th fixed Coil 10 ... Sensor 10A ... 1st sensor 10B ... 2nd sensor 12 ... Cylindrical part 12b ... Lower pedestal part 12c ... Contact part 12d ... Upper pedestal part 12j・ ・ ・ Coil support part 12t ・ ・ ・ Protrusion part 13 ・ ・ ・ Winding part 16, 16X ・ ・ ・ Upper leaf spring 16c ・ ・ ・ Wire fixing part 16e ・ ・ ・ Outer part 16f ・ ・ ・ Second elastic arm part 16g・ ・ ・ First elastic arm part 16h ・ ・ ・ Connection plate part 16i ・ ・ ・ Inner part 16x ・ ・ ・ Through hole 17 ・ ・ ・ Coil substrate 18 ・ ・ ・ Base member 18k ・ ・ ・ Opening 18q ・ ・ ・ Protruding part 18t ・ ・ ・ Protrusion 19 ・ ・ ・ Recess 23d ・ ・ ・ Recess 24c ・ ・ ・ Contact 25t ・ ・ ・ Protrusion 26, 26X ・ ・ ・ Lower leaf spring 26c ・ ・ ・ Connection part 26e ・ ・ ・ Outer part 26g ・ ・ ・ Elastic arm part 26i ・ ・ ・ Inner part 26p ・ ・ ・ Connecting part 33 ・ ・ ・ Wire rod 33A ・ ・ ・ End on the winding start side 33B ・ ・ ・ End on the winding end side 50, 51 ・ ・ ・Contact part 52 ... Flange part 72 ... Protruding part 101, 101A ... Lens drive device CP1 to CP6 ... Contact part CT1, CT2 ... Notch part EP1 to EP6 ... Elastic part ES1 ~ ES7 ... End face GE ... Damper material GL1 to GL3 ... Adhesive H1 to H8 ... Through hole JD ... Optical axis LB ... Lower member LPT ... Raised part LSP ...・ Lower spacer member MB ・ ・ ・ Movable side member MH ・ ・ ・ Magnet holding member MHc ・ ・ ・ Contact part MHt ・ ・ ・ Protruding part MK ・ ・ ・ Axial drive mechanism PR ・ ・ ・ Convex part RG ・ ・ ・ Fixed side member RK ・ ・ ・ Radial drive mechanism RS1 ・ RS3 ・ ・ ・ Recessed SD・ ・ ・ Solder SP ・ ・ ・ Spacer members TG1 to TG4 ・ ・ ・ Cantilever beam part TG5, TG6 ・ ・ ・ Double-sided beam part UPT ・ ・ ・ Raised part USP ・ ・ ・ Upper spacer member

Claims (11)

Support members and
A lens holding member that can hold the lens body and
An upper leaf spring and a lower leaf spring provided so as to connect the support member and the lens holding member,
A drive mechanism for moving the lens holding member in the optical axis direction with respect to the support member,
A first impact mitigation unit that functions when the lens holding member moves upward,
A second impact mitigation unit that functions when the lens holding member moves downward,
In the lens drive device having
The lens driving device, wherein the first impact mitigation portion and the second impact mitigation portion are composed of one of the upper leaf spring and the lower leaf spring. The first impact mitigation portion has a first elastic portion and has a first elastic portion.
The second impact mitigation portion has a second elastic portion.
The lens driving device according to claim 1. A through hole is formed in at least one of the first elastic portion and the second elastic portion.
The lens driving device according to claim 2. The one leaf spring has an elastic arm portion located between a first portion fixed to the support member, a second portion fixed to the lens holding member, and the first portion and the second portion. And have
One of the first impact mitigation section and the second impact mitigation section is connected to the first portion, and the other of the first impact mitigation section and the second impact mitigation section is connected to the second portion. Yes,
The lens driving device according to any one of claims 1 to 3. The one leaf spring has an elastic arm portion located between a first portion fixed to the support member, a second portion fixed to the lens holding member, and the first portion and the second portion. And have
At least one of the first impact mitigation portion and the second impact mitigation portion is connected to the elastic arm portion.
The lens driving device according to any one of claims 1 to 3. The first impact mitigation portion and the impact mitigation portion having the second impact mitigation portion are formed on one of the leaf springs.
The support member has a first contact portion facing the upper surface of the impact mitigation portion and a second contact portion facing the lower surface of the impact mitigation portion.
The lens driving device according to claim 1. The impact absorbing portion is formed in the shape of a double-sided beam.
The lens driving device according to claim 6. The support member has a pair of spacer members.
The one leaf spring is sandwiched by the pair of spacer members.
The lens driving device according to claim 6 or 7. Three or more of the first impact mitigation portions are arranged around the optical axis at intervals in the circumferential direction.
Three or more of the second impact mitigation portions are arranged around the optical axis at intervals in the circumferential direction.
The lens driving device according to any one of claims 1 to 8. A first stopper portion that comes into contact with the lens holding member when the lens holding member moves upward by a first distance, and a first stopper portion.
It has a second stopper portion that comes into contact with the lens holding member when the lens holding member moves downward by a second distance.
The first impact mitigation unit functions when the lens holding member moves upward by a distance smaller than the first distance.
The second impact mitigation unit functions when the lens holding member moves downward by a distance smaller than the second distance.
The lens driving device according to any one of claims 1 to 9. The lens driving device according to any one of claims 1 to 10.
With the lens body
It has an image sensor facing the lens body, and has the image sensor.
The camera module.

Images