JP2019028112A - Optical unit with tremor correction function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical unit with a shake correction function which improves the performance by eliminating duplication of parts and duplication of functions. A movable body (16) is swingably supported by a support (17) and housed inside a fixed body (15). The lens 18 is exposed at the opening of the subject side case 13. The lens 18 is held by a lens barrel member 19 provided in the movable body 16. The cylindrical portion 40 c of the holder 40 constituting the movable body 16 has a shape surrounding the outer periphery of the lens barrel member 19. A male screw is formed on the outer periphery of the lens barrel member 19, and a female screw that fits into the male screw of the lens barrel member 19 is formed on the inner circumference of the tube part 40 c. The attachment of the lens barrel member 19 to the holder 40 is performed by fitting the male screw and the female screw, and the lens barrel member 19 is directly fixed to the holder 40. [Selection diagram] FIG.

Description

  The present invention relates to an optical unit with a shake correction function that is mounted on a portable terminal or a moving body.

  Conventionally, as this type of optical unit with a shake correction function, for example, there is one disclosed in Patent Document 1. The optical unit includes a movable body including an optical element and a support body that supports the movable body in a swingable manner by a swing support mechanism. The support body is configured as a fixed body with respect to the movable body, and the lens that is an optical element is exposed to the subject side to accommodate the movable body. The movable body includes an optical module and a holder that holds the optical module from the outer peripheral side, and is generally shown in an exploded perspective view of FIG.

  The optical module is configured by holding a lens barrel member 1 that holds an optical element and a circuit board 3 on which an imaging element 2 is mounted, as shown in FIG. The lens barrel member 1 is attached to the sensor cover 4 with its outer periphery fitted with a screw to the inner periphery of a cylindrical portion 4 a formed at the center of the sensor cover 4. Inside the cylindrical portion 4a, a rectangular opening 4b for allowing subject light incident via the optical element to enter the imaging element 2 is formed. The holder 5 includes a cylindrical holding portion 5b formed at the center of the bottom plate portion 5a, and wall portions 5c erected on the four sides of the bottom plate portion 5a. The optical module is fixed to the holder 5 by holding the outer periphery of the cylindrical portion 4 a of the sensor cover 4 on the inner periphery of the holding portion 5 b of the holder 5.

  A swing drive coil (not shown) is attached to each wall portion 5c of the holder 5, and a swing drive magnet is attached to each inner wall facing each swing drive coil of the fixed body. These swing drive coil and swing drive magnet constitute a swing drive mechanism, and when the swing drive coil is energized, the movable body is swung to perform shake correction in the pitching direction and the rolling direction. .

Japanese Patent Laying-Open No. 2015-82072

  However, in the conventional optical unit with shake correction function, a movable body is configured by incorporating the existing optical module into a separately designed actuator including the holder. For this reason, the conventional optical unit with a shake correction function described above lacks the technical examination of the component configuration seen from the whole movable body, and there is still room for finding a technical problem to improve the performance of the optical unit. .

  The present invention has been made to solve such a problem, and includes a lens barrel member that holds an optical element, an imaging element that receives subject light imaged by the optical element, and an outer periphery of the lens barrel member. A movable body having a holder to which one of a coil or a magnet constituting the rocking drive mechanism is mounted, and a rocking drive mechanism that supports the movable body through a rocking support mechanism is provided. In the optical unit with a shake correction function including the fixed body to which the other of the coil or the magnet to be attached is attached, the lens barrel member is directly fixed to the holder.

  Conventionally, a technical problem has been found that the lens barrel member is attached to the sensor cover and is held by the movable body in an overlapping manner by fixing the sensor cover to the holder. The present invention has been made to solve this technical problem, and the lens barrel member is directly fixed to the holder without using a sensor cover. According to this configuration, the sensor cover member interposed between the lens barrel member and the holder is not necessary, and the duplication of parts and the duplication of functions are eliminated, so that the performance of the optical unit can be improved. It was. That is, the material cost is reduced by the amount of unnecessary members, and the product cost of the optical unit can be reduced. Further, by filling the space where the unnecessary members around the lens barrel member were present, the movable body, that is, the optical unit can be reduced in size and weight. By reducing the weight of the movable body, the electric power required for the swing drive mechanism can be reduced, and the power consumption of the optical unit can be reduced. In addition, by utilizing the space where unnecessary members around the lens barrel member were present, it becomes possible to provide a large lens barrel member on the movable body, and the image obtained by the optical unit without changing the external dimensions. The number of pixels can be increased.

  Further, the present invention is characterized in that the holder has a cylindrical portion surrounding the outer periphery of the lens barrel member, and the outer periphery of the lens barrel member is directly fixed to the inner periphery of the cylindrical portion.

  According to this configuration, unnecessary members are reduced in the radial direction of the lens barrel member, and a space can be filled in or secured in the radial direction of the lens barrel member. Moreover, the cylindrical member of the cylindrical part inner periphery of a holder and the outer periphery of a lens-barrel member are fitted and fixed, and the holding | maintenance of the lens-barrel member by a holder is performed reliably stably.

  Further, the present invention is characterized in that a male screw is formed on the outer periphery of the lens barrel member, and a female screw that fits on the male screw is formed on the inner periphery of the cylindrical portion of the holder.

  According to this configuration, the lens barrel member can be changed in relative position with respect to the holder by the screw action of the male screw and the female screw. Therefore, the optical element held by the lens barrel member moves forward and backward with respect to the holder according to the pitch of the screw, and the distance from the imaging element is adjusted. For this reason, the distance adjustment between the optical element and the imaging element can be performed with an increased resolution, and the focus adjustment can be performed with high accuracy. In addition, since the outer periphery of the lens barrel member and the inner periphery of the holder are fitted with each other and the lens barrel member is held by the holder, the contact area between the lens barrel member and the holder increases. The fixing between can be made firm.

  Conventionally, an existing optical module is configured by assembling a lens barrel member together with a sensor cover to which an imaging element is attached. For this reason, if the specification of the lens barrel member is changed, the specification of the male screw formed on the outer periphery of the lens barrel member is changed, so that it matches the specification of the male screw of the lens barrel member assembled together with the lens barrel member. In addition, the sensor cover and the image sensor on which the female screw is formed have to be changed together with the lens barrel member. However, according to this configuration, since the movable body is configured without using the existing optical module using the sensor cover, the female screw formed on the holder is adapted to the specifications of the new male screw of the lens barrel member. By simply changing the specification, it is possible to cope with the specification change of the lens barrel member.

  The present invention also provides a sensor cover having an opening for allowing subject light to enter the image sensor and a covering formed around the opening to cover the image sensor. It is provided.

  According to this configuration, since the image sensor portion excluding the portion where the subject light is incident is covered with the covering portion of the sensor cover, unnecessary light does not enter the image sensor as noise light.

  Further, according to the present invention, the holder includes a sensor cover portion having an opening for allowing subject light to be incident on the image pickup device and a covering portion formed around the opening to cover the image pickup device. It is characterized by providing as.

  Also with this configuration, the image sensor portion excluding the portion where the subject light is incident is covered with the covering portion of the sensor cover portion, so that unnecessary light does not enter the image sensor as noise light. Moreover, since the sensor cover part is formed as a member integrated with the holder and the number of components does not increase, the product cost of the optical unit can be suppressed.

  Further, the present invention is characterized in that the sensor cover is formed with a boss on a surface of the covering portion facing the holder, and the holder is formed with a hole or a recess in which the boss fits on the surface facing the covering portion. .

  According to this configuration, the boss formed on the covering portion of the sensor cover is fitted into the hole or the recess formed in the holder, and the sensor cover is fixed to the holder, so that the optical element and the sensor cover held by the holder are fixed. Relative positioning with the held image sensor can be performed easily.

  In addition, the present invention is characterized in that the sensor cover has a cylindrical portion that surrounds the periphery of the opening portion and is erected on the holder side and fitted into the holder.

  According to this configuration, the cylindrical portion erected on the holder side of the sensor cover is fitted to the holder, and the sensor cover is fixed to the holder, whereby the optical element held by the holder and the sensor cover are held. Relative positioning with the image sensor can be easily performed.

  Further, the present invention is characterized in that the sensor cover is fixed to the holder with an adhesive.

  According to this configuration, the sensor cover and the holder can be fixed to each other with the adhesive after the lens barrel member and the holder are relatively positioned. In addition, when the lens barrel member and the holder are fitted with each other with a screw, the adhesive enters the gap between the fitting portions of the lens barrel member and the holder, thereby filling the gap and the lens barrel member and the holder. It is possible to prevent the shaking from being fixed.

  In the invention, the swing drive mechanism is characterized in that the coil is attached to the holder and the magnet is attached to the fixed body.

  According to this configuration, the coil constituting the swing drive mechanism is attached to the holder, so that the weight of the movable body can be reduced compared to the case where the magnet constituting the swing drive mechanism is attached to the holder. Can do. Therefore, the drive power required for the swing drive mechanism is reduced, and the power consumption of the optical unit can be reduced. Further, the fixed body can be used as a yoke by attaching the magnet constituting the swing drive mechanism to the fixed body and forming the fixed body from a magnetic material such as metal. Therefore, it is not necessary to form the holder from a magnetic material such as metal in order to use the yoke, and the holder can be formed from resin. For this reason, the weight of the holder can be reduced, the driving power required for the swing drive mechanism can be reduced, and the female screw can be easily formed in the holder.

  According to the optical unit with a shake correction function of the present invention, the sensor cover member interposed between the lens barrel member and the holder becomes unnecessary, and the duplication of parts and the duplication of functions are eliminated. Can be improved.

It is a disassembled perspective view of the movable body supported by the support body in the conventional optical unit with a shake correction function. 1 is an external perspective view of an optical unit with a shake correction function according to an embodiment of the present invention. It is a disassembled perspective view of the optical unit with a shake correction function by one Embodiment. It is an external appearance perspective view of the support body which supports a movable body in the optical unit with a shake correction function by one Embodiment. It is the disassembled perspective view which isolate | separated the movable body from the support body in the optical unit with a shake correction function by one Embodiment. It is a disassembled perspective view of the movable body in the optical unit with a shake correction function by one Embodiment. It is a disassembled perspective view of the movable body which showed each member shown in FIG. 6 typically. (A) is the top view of the movable body which showed each member shown in FIG. 6 typically, (b) is sectional drawing.

  Next, a mode for carrying out the optical unit with a shake correction function according to the present invention will be described.

(overall structure)
FIG. 2 is an external perspective view of the optical unit 11 with a shake correction function according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view.

  In this specification, the three axes of XYZ are directions orthogonal to each other, one side in the X-axis direction is indicated by + X, the other side is indicated by -X, one side in the Y-axis direction is indicated by + Y, and the other side is indicated by -Y. , One side in the Z-axis direction is indicated by + Z and the other side is indicated by -Z. The Z-axis direction is a direction along the optical axis L of the optical element mounted on the movable body 16 in a state where the movable body 16 described later of the optical unit 11 is not swinging. The + Z direction is the object side (subject side) in the optical axis L direction, and the -Z direction is the image side (anti-subject side) in the optical axis L direction.

  The optical unit 11 includes a fixed body 15 including a cylindrical case 12, a subject side case 13, and an anti-subject side case 14. The cylindrical case 12 has a substantially octagonal outer shape and is made of a magnetic material. The subject side case 13 is assembled to the cylindrical case 12 from the + Z direction side (subject side), and the anti-subject side case 14 is the −Z direction side (anti-subject side) with respect to the cylindrical case 12. It is assembled from. The subject side case 13 and the non-subject side case 14 are made of a resin material.

  Inside the fixed body 15, a movable body 16 is supported by and supported by a support body 17. The lens 18 is exposed at the opening of the subject side case 13. The lens 18 is held by a lens barrel member 19 provided in the movable body 16.

(Rotation support mechanism / rolling drive mechanism)
The support 17 is pressed against the subject side case 13 by a leaf spring 21 via an annular retainer 20 whose end face on the subject side holds a plurality of spheres (not shown) arranged in the circumferential direction. Thereby, the sphere held by the retainer 20 is sandwiched between the annular groove 13a of the subject side case 13 and the annular groove (not shown) provided on the subject side end face of the support body 17, and the support body 17 is the end face on the subject side. Is in sliding contact with the end surface of the subject case 13 via a plurality of spheres. The leaf spring 21 is fixed to the bottom of the non-subject side case 14 at both ends in the longitudinal direction. The support 17 includes a ball bearing 22 on the side opposite to the subject, and the ball bearing 22 is fixed to the bottom of the case 14 opposite to the subject via a leaf spring 21. The retainer 20 and the ball bearing 22 constitute a rotation support mechanism that supports the support 17 so as to be rotatable around the Z axis.

  A rolling drive coil 23 is provided on the side opposite to the subject 17 of the support 17, and a rolling drive magnet (not shown) is opposed to the + Z side of the leaf spring 21 on the side opposite to the case 14 on the side opposite to the rolling drive coil 23. Prepare. The rolling drive coil 23 and the rolling drive magnet constitute a rolling drive mechanism.

(Swing support mechanism / swing drive mechanism)
Further, between the movable body 16 and the support body 17, the first axis R1 and the second axis R2 are orthogonal to the Z-axis direction and inclined 45 degrees with respect to the X-axis direction and the Y-axis direction. A gimbal mechanism (not shown) that supports the movable body 16 on the support body 17 so as to swing freely is configured as a swing support mechanism. The swing support mechanism includes two first swing support portions provided at diagonal positions on the first axis R1 in the outer periphery of the movable body 16 and the second axis R2 in the inner periphery of the support body 17. A second swing support portion provided at two diagonal positions, a movable frame (not shown) surrounding the outer periphery of the movable body 16 and supported by the first swing support portion and the second swing support portion. Is provided. Spheres are fixed at four locations around the movable frame, and these spheres make point contact with contact springs respectively held by the first swing support portion and the second swing support portion. The contact spring supported by the first swing support portion is elastically deformable in the first axis R1 direction, and the contact spring supported by the second swing support portion is elastically deformable in the second axis R2 direction. Therefore, the movable frame is supported in a state of being rotatable around the first axis R1 and the second axis R2.

  A swing drive coil 30 is attached to each side of the movable body 16 in the X-axis direction and both sides in the Y-axis direction. Further, a swing drive magnet 31 is attached to both inner walls facing the X-axis direction and both inner walls facing the Y-axis direction of the cylindrical case 12 so as to face each swing drive coil 30. . The swing drive coil 30 and swing drive magnet 31 constitute a swing drive mechanism. The swing driving magnet 31 may be configured to be attached to the support body 17 which is a fixed body with respect to the movable body 16 instead of the cylindrical case 12.

(Shake correction)
The optical unit 11 includes flexible printed circuit boards 32a, 32b, and 33. The flexible printed circuit board 32 a is electrically connected to each rolling drive coil 23, and the flexible printed circuit board 32 b is electrically connected to each swing driving coil 30. The flexible printed circuit board 33 is electrically connected to a circuit board 43 (described later) held by the movable body 16. Note that the flexible printed circuit boards 32a, 32b, and 33 are shown only in FIG. 1 and omitted in other drawings.

  When a current is passed through each rolling drive coil 23 via the flexible printed circuit board 32a, a magnetic driving force in the rolling direction is generated between each rolling drive coil 23 and each rolling drive magnet. A subject image photographed by the camera module is detected by a gyroscope provided in the movable body 16 when the support body 17 rotates around the Z axis with respect to the fixed body 15 by the magnetic driving force in the rolling direction. Image blurring in the rolling direction around the Z axis is corrected. Further, when a current is passed through each swing drive coil 30 via the flexible printed circuit board 32b, a magnetic drive force is generated between each swing drive coil 30 and each swing drive magnet 31. . The subject image photographed by the camera module is provided in the movable body 16 by swinging the movable body 16 around the first axis R1 and the second axis R2 with respect to the support body 17 by these magnetic driving forces. The image blur in the pitching direction around the X axis and the yawing direction around the Y axis detected by the gyroscope is corrected.

(Configuration of support / movable body)
FIG. 4 is an external perspective view of the state in which the movable body 16 is supported by the support body 17 as viewed from the opposite object side. FIG. 5 is an exploded perspective view of the state in which the support 17 and the movable body 16 are separated from the non-subject side. In these drawings, the circuit board 43 provided on the opposite side of the movable body 16 is not shown.

  The support body 17 includes a main body member 17 a located on the outer peripheral side of the movable body 16 and a bottom plate member (not shown) that is fixed to the main body member 17 a from the opposite object side and faces the movable body 16. The main body member 17a and the bottom plate member are made of resin. The main body member 17a includes an annular portion 17a1 that sandwiches the retainer 20 with the subject-side case 13, a vertical frame portion 17a2 that extends from the four locations of the annular portion 17a1 to the non-subject side, and a vertical frame portion 17a2 on the anti-subject side. And a trunk portion 17a3 connected to the frame portion 17a2. A window portion is formed between the adjacent vertical frame portions 17a2.

  The movable body 16 is shown in an exploded perspective view as viewed from the side opposite to the subject in FIG. 6. The image sensor 41 mounted on the circuit board 43 and a sensor cover 42 covering the image sensor 41 are provided. The image sensor 41 receives the subject light imaged by the lens 18 and outputs an electrical signal of the subject light imaged on the circuit board 43 to be mounted.

  FIG. 7 is an exploded perspective view schematically showing each member constituting the movable body 16 and viewing the movable body 16 from the subject side. FIG. 8A is a plan view of the movable body 16 schematically showing constituent members, and FIG. 8B is a cross-sectional view taken along the line bb of FIG. 8A. 7 and 8, the same parts as those in FIG. 6 are denoted by the same reference numerals. As shown in FIGS. 7 and 8, the image sensor 41 is mounted on a circuit board 43. The sensor cover 42 has an opening 42 a for allowing subject light to enter the image sensor 41 and a cover 42 b formed around the opening 42 a to cover the image sensor 41. The covering portion 42b has a rectangular tube shape, and the circuit board 43 on which the imaging element 41 is mounted is fixed to the end surface on the side opposite to the subject of the covering portion 42b by three screws 44 (see FIG. 5). Is covered by the covering portion 42b.

  The holder 40 is provided with resin surrounding the outer periphery of the lens barrel member 19, and has a substantially octagonal bottom plate portion 40a when viewed in the Z-axis direction, and each of the bottom plate portion 40a in the X-axis direction and the Y-axis direction. There are four wall portions 40b erected in the + Z direction on both sides, and a cylindrical portion 40c with the Z axis as the central axis at the center of the bottom plate portion 40a. As shown in FIG. 5, the swing driving coils 30 are attached to the four wall portions 40 b, and the swing driving coils 30 are formed on window portions formed between the vertical frame portions 17 a 2 of the support member 17. Exposed as shown in FIG.

  A leaf spring 45 shown in FIG. 5 is stretched between the annular end surface on the subject side of the cylindrical portion 40 c and the annular end surface on the counter object side of the annular portion 17 a 1 of the support body 17. The leaf spring 45 defines the reference posture of the movable body 16 with respect to the support body 17. That is, when the swing driving coil 30 is in a stationary state where it is not driven, the posture of the movable body 16 is such that the optical axis L (see FIG. 2) of the lens 18 held by the movable body 16 coincides with the Z axis. The reference posture is held by the leaf spring 45.

  The sensor cover 42 is made of resin like the holder 40, and is fixed to the opposite side of the holder 40 as shown in FIG. In this embodiment, the sensor cover 42 is fixed to the holder 40 with an adhesive. As shown in FIG. 7, the sensor cover 42 is formed with a pair of bosses 42 c sandwiching the opening 42 a diagonally on the surface of the cover 42 b that faces the holder 40. In the holder 40, a pair of holes 40d into which the bosses 42c are fitted are formed on the surface of the bottom plate part 40a facing the covering part 42b. The pair of holes 40d may be a pair of recesses (not shown) into which the boss 42c is fitted.

  The cylindrical portion 40 c of the holder 40 has a shape surrounding the outer periphery of the lens barrel member 19. The lens barrel member 19 is directly fixed to the holder 40 with the outer periphery fixed to the inner periphery of the tube portion 40 c. In the present embodiment, a male screw is formed on the outer periphery of the lens barrel member 19, and a female screw that fits on the male screw of the lens barrel member 19 is formed on the inner periphery of the tube portion 40 c. The lens barrel member 19 is attached to the holder 40 by fitting these male and female screws.

(Function and effect)
In the conventional optical unit with a shake correction function, the lens barrel member 1 shown in FIG. 1 is attached to the sensor cover 4, and then the sensor cover 4 is fixed to the holder 5. Thus, a technical problem has been found that the sensor cover 4 and the holder 5 are held by the movable body overlapping in the radial direction. In order to solve this technical problem, the optical unit 11 with shake correction function according to the present embodiment directly fixes the lens barrel member 19 to the holder 40 without using the sensor cover 42 as shown in FIGS. It was set as the structure to do.

  According to the optical unit 11 with shake correction function according to the present embodiment, the sensor cover 4 interposed between the lens barrel member 1 and the holder 5 of the conventional optical unit with shake correction function shown in FIG. The member of the cylindrical portion 4a becomes unnecessary, the overlapping of parts about the cylindrical portion 4a and the holding portion 5b, the fixing function between the lens barrel member 1 and the cylindrical portion 4a, and the fixing function between the cylindrical portion 4a and the holding portion 5b. The duplication of the function is eliminated, and the performance of the optical unit 11 can be improved.

  That is, the material cost is reduced by an amount corresponding to the unnecessary cylindrical portion 4a, and the product cost of the optical unit 11 can be reduced. Further, by filling the space where the unnecessary members around the lens barrel member 19 existed, the movable body 16, and thus the optical unit 11, can be reduced in size and weight. In the present embodiment, the cylindrical portion 4a of the conventional optical unit with a shake correction function is reduced as an unnecessary member in the radial direction of the lens barrel member 19, and the optical unit 11 is reduced by filling the space in the radial direction of the lens barrel member 19. It becomes possible to reduce the size and weight. By reducing the weight of the movable body 16, it is possible to reduce the power required for the swing drive mechanism including the swing drive coil 30 and the swing drive magnet 31, and to reduce the consumption of the optical unit 11. Electricity can be achieved. Further, by utilizing the space in which the cylindrical portion 4a around the radial direction of the lens barrel member 19 was present, a space can be secured in the radial direction of the lens barrel member 19, and the large lens barrel member 19 can be moved to the movable body. 16 can be prepared. Therefore, it is possible to increase the number of pixels of an image obtained by the optical unit 11 without changing the external dimensions. Further, the cylindrical member 19 between the inner periphery of the cylindrical portion 40c of the holder 40 and the outer periphery of the barrel member 19 is fitted and fixed, so that the barrel member 19 is reliably and stably held by the holder 40. .

  Further, according to the optical unit 11 with shake correcting function according to the present embodiment, the relative position of the lens barrel member 19 with respect to the holder 40 is varied by the screw action of the male screw and the female screw of the cylindrical portion 40c. Accordingly, the lens 18 held by the lens barrel member 19 advances and retreats with respect to the holder 40 in accordance with the screw pitch, and the distance from the image sensor 41 is adjusted. For this reason, the distance adjustment between the lens 18 and the image sensor 41 can be performed with an increased resolution, and the focus adjustment can be performed with high accuracy. Further, the outer periphery of the lens barrel member 19 and the inner periphery of the cylinder portion 40c of the holder 40 are fitted with each other by screws so that the lens barrel member 19 is held by the holder 40, so that the contact area between the lens barrel member 19 and the holder 40 is increased. Therefore, the fixation between the lens barrel member 19 and the holder 40 can be made firm.

  Conventionally, an existing optical module is configured by assembling the lens barrel member 1 together with a sensor cover 4 to which the imaging device 2 is attached. For this reason, when the specification of the lens barrel member 1 is changed, the specification of the male screw formed on the outer periphery of the lens barrel member 1 is changed. Therefore, the male screw of the lens barrel member 1 assembled together with the lens barrel member 1 is used. The sensor cover 4 and the image pickup device 2 in which the female screw meeting the specifications of the above is formed on the cylindrical portion 4 a must be changed together with the lens barrel member 1. However, according to the present embodiment, since the movable body 16 is configured without using the existing optical module using the sensor cover 4, the holder 40 can be adapted to the specifications of the new male screw of the lens barrel member 19. By simply changing the specifications of the female screw formed in the tube portion 40c, it is possible to cope with the specification change of the lens barrel member 19. The specifications of the female screw formed on the cylindrical portion 40c of the holder 40 can be easily changed by simply changing the parts of the female screw portion to be nested in the mold for molding the holder 40. It becomes possible to easily cope with the lens barrel member 19 including the above.

  Further, according to the optical unit 11 with the shake correction function according to the present embodiment, the image sensor 41 except the portion where the subject light is incident through the opening 42a is covered with the covering portion 42b of the sensor cover 42. Unnecessary light does not enter the element 41 as noise light.

  Further, according to the optical unit 11 with shake correction function according to the present embodiment, the boss 42c formed on the covering portion 42b of the sensor cover 42 is fitted into the hole 40d or the recess formed in the holder 40, and the sensor cover 42 is attached to the holder. By fixing to 40, the relative positioning of the lens 18 held by the holder 40 and the image sensor 41 held by the sensor cover 42 can be easily performed.

  Further, in the optical unit 11 with shake correction function according to the present embodiment, the sensor cover 40 is fixed to the holder 42 with an adhesive, and therefore the sensor cover 42 and the holder are positioned after the lens barrel member 19 and the holder 40 are relatively positioned. 40 can be fixed with an adhesive. Further, in this embodiment, since the barrel member 19 and the holder 40 are fitted with each other with screws, the adhesive enters the gap between the fitting portions of the barrel member 19 and the holder 40, so that the gap is reduced. The lens barrel member 19 and the holder 40 are fixed to each other and can be prevented from shaking.

(Modification)
In the optical unit 11 with shake correction function according to the present embodiment, the case where the swing drive coil 30 constituting the swing drive mechanism is attached to the holder 40 and the swing drive magnet 31 is attached to the fixed body 15. As described above, conversely, the swing drive coil 30 may be attached to the fixed body 15 and the swing drive magnet 31 may be attached to the holder 40. However, according to the optical unit 11 with the shake correction function according to this embodiment in which the swing drive coil 30 is attached to the holder 40 and the swing drive magnet 31 is attached to the fixed body 15, the swing drive coil 30 is By attaching to the holder 40, the weight of the movable body 16 can be reduced as compared with the case where the swing driving magnet 31 is attached to the holder 40. Therefore, the drive power required for the swing drive mechanism is reduced, and the power consumption of the optical unit 11 can be reduced. Moreover, the fixed body 15 can be used as a yoke by attaching the swing drive magnet 31 to the fixed body 15 and forming the fixed body 15 with a magnetic material such as metal as in the present embodiment. Therefore, it is not necessary to form the holder 40 from a magnetic material such as a metal in order to use the yoke, and the holder 40 can be formed from a resin. For this reason, it is possible to reduce the weight of the holder 40 and reduce the driving power required for the swing drive mechanism, and it is possible to easily form a female screw on the holder 40.

  In the optical unit 11 with shake correction function according to the present embodiment, the case where the sensor cover 42 and the holder 40 are configured separately and the sensor cover 42 is integrally attached to the holder 40 has been described. However, the holder 40 has a sensor cover portion (not shown) having an opening 42 a for allowing subject light to enter the image sensor 41 and a covering portion 42 b formed around the opening 42 a to cover the image sensor 41, on the side opposite to the subject. You may comprise so that the holder 40 may be provided as an integral member. Also in this configuration, the portion of the image sensor 41 except the portion where the subject light is incident is covered with the covering portion 42b of the sensor cover portion, so that unnecessary light does not enter the image sensor 41 as noise light. Moreover, since the sensor cover part is formed as a member integrated with the holder 40 and the number of components does not increase, the product cost of the optical unit 11 can be suppressed.

  In the optical unit 11 with shake correction function according to the present embodiment, the case where the surface on which the opening 42a of the sensor cover 42 is formed is formed flat has been described. However, on the surface of the sensor cover 42 on which the opening 42a is formed, Z is erected on the holder 40 side so as to surround the opening 40a, and the outer periphery is fitted to the inner periphery of the cylindrical portion 40c of the holder 40. You may comprise so that the sensor cover 42 may be provided with the cylinder part centering on an axis | shaft. At this time, the height of the tube portion is set to a low height that does not hinder the fitting of the lens barrel member 19 and the tube portion 40c with screws and does not reach the screw fitting portion. According to this configuration, the cylindrical portion erected on the holder 40 side of the sensor cover 42 is fitted to the holder 40, and the sensor cover 42 is fixed to the holder 40, so that the boss 42c and the hole 40d are not provided. However, relative positioning of the lens 18 held by the holder 40 and the image sensor 41 held by the sensor cover 42 can be easily performed.

  In the optical unit 11 with shake correction function according to the present embodiment, the case where the sensor cover 42 and the holder 40 are fixed with an adhesive has been described. However, the sensor cover 42 and the holder 40 may be configured to be mechanically fixed to each other by, for example, being mechanically coupled with a hook portion. According to this configuration, the sensor cover 42 and the holder 40 are more firmly fixed to each other, and the impact strength when the optical unit 11 is dropped is improved.

  The optical unit 11 with a shake correction function according to the present embodiment is an optical device such as an action camera or a wearable camera mounted on an optical device such as a mobile phone with a camera or a drive recorder, or a moving body such as a helmet, bicycle, or radio controlled helicopter. Can be used for equipment. In such an optical device, if a shake occurs in the optical device during shooting, the captured image is disturbed. However, the optical unit 11 with a shake correction function according to the present embodiment uses the movable body 16 as the support 17 as described above. By swinging with respect to the image, the shake correction is performed, so that the shake of the captured image can be avoided.

  DESCRIPTION OF SYMBOLS 11 ... Optical unit with a shake correction function, 12 ... Cylindrical case, 13 ... Subject side case, 13a ... Annular groove, 14 ... Anti-subject side case, 15 ... Fixed body, 16 ... Movable body, 17 ... Support body, 17a ... Main body member, 17a1 ... annular part, 17a2 ... vertical frame part, 17a3 ... trunk part, 18 ... lens (optical element), 19 ... lens barrel member, 20 ... retainer, 21 ... leaf spring, 22 ... ball bearing, 23 ... Coil for rolling drive, 30 ... Coil for swing drive, 31 ... Magnet for swing drive, 32a, 32b, 33 ... Flexible printed circuit board, 40 ... Holder, 40a ... Bottom plate part, 40b ... Wall part, 40c ... Tube part , 40d ... hole, 41 ... imaging device, 42 ... sensor cover, 42a ... opening, 42b ... cover, 42c ... boss, 43 ... circuit board, 44 ... screw, 45 ... leaf spring

Claims (9)

A lens barrel member that holds an optical element, an imaging element that receives subject light imaged by the optical element, and a coil or magnet that surrounds the outer periphery of the lens barrel member and forms a swing drive mechanism A movable body having a holder to which one is attached;
In an optical unit with a shake correction function, comprising: a fixed body to which the other of a coil or a magnet constituting the swing drive mechanism is mounted, which supports the movable body swingably via a swing support mechanism.
The optical unit with a shake correction function, wherein the lens barrel member is directly fixed to the holder.   2. The shake correction function according to claim 1, wherein the holder has a cylindrical portion surrounding the outer periphery of the barrel member, and the outer periphery of the barrel member is directly fixed to the inner periphery of the cylindrical portion. Optical unit.   The shake correction function according to claim 2, wherein the lens barrel member has a male screw formed on an outer periphery thereof, and the holder has a female screw fitted on the male screw on an inner periphery of the tube portion. With optical unit.   A sensor cover having an opening for allowing subject light to be incident on the image sensor and a cover that is formed around the opening and covers the image sensor is fixed to the opposite side of the holder and is provided integrally with the holder. The optical unit with a shake correction function according to claim 1, wherein the optical unit has a shake correction function.   The holder includes, as a member integrated with the holder on the side opposite to the subject, a sensor cover portion having an opening for allowing subject light to enter the imaging element and a covering portion formed around the opening to cover the imaging element. The optical unit with a shake correction function according to claim 1, wherein the optical unit has a shake correction function.   2. The sensor cover according to claim 1, wherein a boss is formed on a surface of the covering portion facing the holder, and a hole or a recess into which the boss fits is formed on the surface of the holder facing the covering portion. 5. An optical unit with a shake correction function according to 4.   5. The optical unit with a shake correction function according to claim 4, wherein the sensor cover includes a cylindrical portion that is provided on the holder side so as to surround the opening and is fitted to the holder.   The optical unit with a shake correction function according to claim 4, wherein the sensor cover is fixed to the holder with an adhesive.   The optical unit with a shake correction function according to claim 1, wherein the swing drive mechanism includes a coil attached to the holder and a magnet attached to the fixed body.

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