JP2012068316A - Drive unit and method for manufacturing drive unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent mutual collision or pressure contact of components of a drive unit according to a force applied to the drive unit side via a lens barrel when the lens barrel is mounted with respect to the drive unit.SOLUTION: This drive unit for displacing a driven body with respect to a fixing-side member, the driven body includes an outer peripheral barrel 31 around which a lens holder 55 holding a lens is mounted, and a movable member is provided with a jig engagement portion 33 with which a jig is engaged. The jig engagement portion 33 is configured to prevent, by the engagement of jigs 301 and 302 therewith 33, at least one of the displacement of the outer peripheral barrel 31 along the mounting direction of the lens holder 55 with respect to the outer peripheral barrel 31 and rotation of the outer peripheral barrel 31 on a plane crossing with the mounting direction.

Description

  The present invention relates to a drive device and a method for manufacturing the drive device.

  In recent years, cameras have been incorporated into a wide variety of products. When a camera is mounted on a small electronic device such as a mobile phone or a notebook computer, it is strongly required to reduce the size of the camera itself.

  Patent Document 1 discloses a driving device in which a piezoelectric element and a drive shaft move in synchronization with a moving object in a state where the piezoelectric element is separated from a fixed member. This makes it possible to easily set the frequency of the drive waveform applied to the piezoelectric element. Patent Document 2 discloses a piezoelectric element that expands and contracts when a voltage is applied, a drive shaft that is fixed to one end of the piezoelectric element in the optical axis direction, a lens holder that is fixed to the other end of the piezoelectric element in the optical axis direction, and a drive shaft. A drive device is disclosed that includes a friction portion that is frictionally engaged with a base and a base that supports the drive shaft so as to be movable along the optical axis direction.

Japanese Patent No. 4372206 JP 2009-124857 A

  By the way, there is a case where the drive device may be sold in a mode that allows the lens system to be retrofitted. This makes it possible to sell the drive device to a manufacturer who wishes to incorporate a lens system manufactured in-house into the drive device purchased by another company. In this case, the driving device purchasing company bears the process of incorporating the lens barrel holding the lens system manufactured in-house into the driving device purchased by another company.

  In the above-described case, when the lens barrel is attached to the driving device, the force applied to the lens barrel for attaching the lens barrel to the driving device may be transmitted to the driving device side. As a result, the constituent members of the drive device may collide, press contact, and the like.

  For example, when the lens barrel is screwed into the receiving member in the driving device, the rotational force applied to the lens barrel is also transmitted to the receiving member. When the receiving member rotates according to the rotational force applied to the lens barrel, the receiving member and other components of the driving device may collide or come into pressure contact with each other. For example, the above-described receiving member may be chipped or scratched, or the resin constituting the receiving member may be scraped off to generate dust due to collision or pressure contact between the constituent members of the driving device. The method of incorporating the lens barrel into the driving device is arbitrary, and screwing the lens barrel into the driving device is not a prerequisite for the present invention.

  As is apparent from the above description, when the lens barrel is attached to the drive device, the constituent members of the drive device collide or come into pressure contact according to the force applied to the drive device side through the lens barrel. Suppression is strongly desired.

  The drive device according to the present invention is a drive device that displaces a driven body with respect to a fixed-side member, and the driven body includes a movable member to which a lens holding body holding a lens is mounted, and the movable body The member is provided with a jig engaging portion with which a jig engages, and the jig engaging portion is configured to engage the lens with respect to the movable member by engaging the jig with the jig engaging portion. At least one of the displacement of the movable member along the mounting direction of the holding body and the rotation of the movable member on a plane intersecting the mounting direction is prevented. By adopting this configuration, when the lens holder is mounted on the movable member, it is possible to prevent the constituent members of the driving device from colliding with each other or being pressed against each other according to the force applied to the driving device via the lens holder. can do.

  The movable member may be a cylinder surrounding the lens holding body, and the jig engaging portion may be provided on an outer peripheral side surface of the cylinder.

  The fixed-side member may include a polygonal envelope as viewed from above, and the jig engaging portion may be disposed at a corner of the envelope.

  It is preferable that a rotation inhibiting portion that inhibits rotation of the movable member is provided on an outer peripheral side surface of the movable member.

  The jig engaging portion may extend along a mounting direction of the lens holder with respect to the movable member.

  The lens holder is preferably screwed into the movable member.

  The fixed-side member includes an envelope that surrounds the movable member, and the envelope is preferably provided with an introduction port that allows the jig to be introduced into the envelope. .

  The jig engaging portion may be a convex portion that extends with the mounting direction of the lens holder relative to the movable member as a longitudinal direction.

  A piezoelectric element and a drive shaft that is directly or indirectly engaged with the piezoelectric element may be further provided, and the drive shaft may be fixed to the movable member.

  The envelope is provided with a partition that separates an upper space that accommodates the movable member and a lower space that accommodates an imaging element that captures an image input via the lens, It is good to be provided in the said partition part.

  It is preferable to further include a lens holder attached to the movable member.

  A camera module according to the present invention includes the above-described driving device and an image sensor that acquires an image input via the lens held by the lens holder.

  A manufacturing method of a driving apparatus according to the present invention is a manufacturing method of a driving apparatus that displaces a driven body including a lens holding body and a movable member to which the lens holding body is attached, with respect to a fixed side member. The movable member is configured to engage a jig with a jig engaging portion provided on the member, and to move the lens holder along the mounting direction with respect to the movable member by engaging the jig with the jig engaging portion. The lens holder is mounted on the movable member in a state where at least one of displacement of the member and rotation of the movable member in a plane intersecting the mounting direction is blocked.

  Preferably, the jig supports the movable member from a direction opposite to the mounting direction of the lens holding body with respect to the movable member. The movable member may be supported from a plurality of directions by the jig. The jig may be introduced into the inside of the envelope through an introduction port provided in the envelope that surrounds the movable member.

  According to the present invention, when the lens holder is mounted on the movable member, it is possible to prevent the constituent members of the driving device from colliding with each other or being pressed against each other according to the force applied to the driving device via the lens holding body. Can do.

1 is a schematic exploded perspective view of a camera module according to a first embodiment. 1 is a schematic exploded perspective view of a camera module according to a first embodiment. 1 is a schematic perspective view of a camera module according to a first embodiment. 1 is a schematic top view of a camera module according to a first embodiment. 1 is a schematic diagram illustrating a schematic cross-sectional configuration of a camera module according to a first embodiment. 1 is a schematic diagram illustrating a schematic cross-sectional configuration of a camera module according to a first embodiment. 1 is a schematic top view of a camera module according to a first embodiment. 1 is a schematic diagram illustrating a schematic cross-sectional configuration of a camera module according to a first embodiment. 1 is a schematic diagram illustrating a schematic cross-sectional configuration of a camera module according to a first embodiment. 1 is a schematic top view of a camera module according to a first embodiment. FIG. 6 is an explanatory diagram for explaining a drive shaft holding structure according to the first embodiment; 1 is a schematic perspective view of an outer peripheral barrel according to a first embodiment. It is a schematic side view of the outer periphery barrel concerning Embodiment 1. FIG. 1 is a schematic top view of a camera module according to a first embodiment. FIG. 6 is a process diagram illustrating a manufacturing process of the camera module according to the first embodiment; FIG. 6 is a process diagram illustrating a manufacturing process of the camera module according to the first embodiment. FIG. 6 is a process diagram illustrating a manufacturing process of the camera module according to the first embodiment; FIG. 6 is a process diagram illustrating a manufacturing process of the camera module according to the first embodiment; FIG. 6 is a process diagram illustrating a manufacturing process of the camera module according to the first embodiment; 1 is a schematic diagram showing a mobile phone according to a first exemplary embodiment; FIG. 3 is a block diagram illustrating a configuration of a drive unit of the camera module according to the first embodiment. 3 is a timing chart illustrating a relationship between a drive voltage waveform and a movement state according to the first embodiment. FIG. 4 is a schematic exploded perspective view of a camera module according to a second embodiment. It is a schematic perspective view of the outer periphery barrel concerning Embodiment 2. FIG. It is a schematic bottom view of the outer periphery barrel concerning Embodiment 2. FIG. FIG. 6 is a schematic top view of a housing according to a second embodiment. FIG. 6 is a schematic diagram illustrating a configuration of a manufacturing jig according to a second embodiment. FIG. 10 is a process diagram illustrating a manufacturing process of the camera module according to the second embodiment. FIG. 10 is a process diagram illustrating a manufacturing process of the camera module according to the second embodiment. FIG. 10 is a process diagram illustrating a manufacturing process of the camera module according to the second embodiment. FIG. 10 is a process diagram illustrating a manufacturing process of the camera module according to the second embodiment. FIG. 6 is a schematic exploded perspective view of a camera module according to a third embodiment. FIG. 6 is a schematic perspective view of a camera module according to a third embodiment. FIG. 6 is a schematic top view of a camera module according to a third embodiment. FIG. 6 is a schematic top view of a camera module according to a third embodiment. FIG. 6 is a schematic diagram illustrating a schematic cross-sectional configuration of a camera module according to a third embodiment. It is a schematic perspective view which shows the case where an image sensor chip is bonded together with respect to IR cut filter. It is a schematic side view which shows the variation of a jig engaging part. It is a schematic top view of the camera module concerning a reference example.

  Hereinafter, embodiments will be described with reference to the drawings. Each embodiment is not individually independent, but can be combined with each other, and the effect of the combination can also be grasped. The drawings are for illustrative purposes, and it is not permissible to make a limited interpretation of the present invention based on the drawings.

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are schematic exploded perspective views of the camera module. FIG. 3 shows a schematic perspective view of the camera module before and after the lid is removed.

  As shown in FIGS. 1 to 3, the camera module 100 includes a wiring board 10, an image sensor chip (imaging device) 12, an IR cut filter 13, a housing 20, a drive unit 30, a lens holder (lens holder) 55, It has a lid 60 and a cover plate 65. The drive unit 30 includes an outer peripheral barrel (movable member, frame, cylinder) 31, a shaft holding portion 40, a piezo element (piezoelectric element, electromechanical transducer) 50, and a drive shaft 51 (see FIG. 5). The piezo element 50 and the drive shaft 51 are fixed with respect to the outer peripheral barrel 31. The shaft holding unit 40 is fixed to the housing 20. The shaft holding part 40 is frictionally engaged with the drive shaft 51. The housing 20 functions as an envelope that surrounds the outer peripheral barrel 31 alone or together with the lid 60.

  On the outer peripheral side surface of the outer peripheral barrel 31, a protrusion (jig engaging portion) 33 with which a positioning jig is engaged is provided. On the outer peripheral side surface of the outer peripheral barrel 31, a projecting piece (rotation suppressing portion) 35 that suppresses the rotation of the outer peripheral barrel 31 is provided together with the column portion 25 provided in the housing 20. The length of the protrusion 33 in the y-axis direction is sufficiently longer than the length of the protrusion 35 in the same direction. The lid 60 is provided with an introduction port OP1 for introducing the lens holder 55 into the housing 20. The lid 60 is provided with an introduction port OP2 for introducing the positioning jig described above into the housing 20. The introduction port OP1 and the introduction port OP2 are connected to each other.

  As shown in FIG. 1, the image sensor chip 12, the IR cut filter 13, the housing 20, the drive unit 30, the lens holder 55, the lid 60, and the cover plate 65 are arranged on the wiring substrate 10 in this order. . The housing | casing 20 is grasped | ascertained as the stationary side member which does not move seeing from the outer periphery barrel 31 which is a to-be-driven body. The driven body includes an outer peripheral barrel 31, a lens holder 55, a lens group held by the lens holder 55, a piezo element 50, and a drive shaft 51.

  The camera module 100 images the light flux coming from the object side through the lens held by the lens holder 55 by the image sensor chip 12. As the piezo element 50 is driven, the piezo element 50, the drive shaft 51, and the outer barrel 31 are moved forward (object side, light input side) along the optical axis AX (matching the y axis) with respect to the housing 20. ) Or backward (image sensor side, light output side). Similarly, the lens holder 55 attached to the outer peripheral barrel 31 is displaced with respect to the housing 20 in accordance with the driving of the piezo element 50. Focusing can be performed by adjusting the lens position with respect to the imaging surface of the image sensor chip 12. The moving direction of the outer peripheral barrel 31 substantially coincides with the optical axis AX.

  As apparent from FIGS. 1 and 2, the lens holder 55 is screwed into the outer barrel 31 and is screwed into the outer barrel 31. The purchasing company of the camera module 100 in which the lens holder 55 shown in FIG. 2 is not incorporated can incorporate its own lens holder 55 into the purchased product. As a result, it is possible to sell the drive device in a state where the lens system is separated, and it is possible to effectively promote the sales of the drive device.

  When the lens holder 55 is screwed into the outer barrel 31, the projection 33 of the outer barrel 31 is held by the positioning jig, and the outer barrel 31 is prevented from rotating. Further, the protrusion 33 of the outer barrel 31 is supported by the jig, and the lower displacement of the outer barrel 31 is prevented. Thereby, when the lens holder 55 is screwed into the outer barrel 31, the outer barrel 31 can be effectively prevented from rotating according to the rotational force applied to the lens holder 55. Further, when the lens holder 55 is screwed into the outer barrel 31, it is possible to effectively suppress the outer barrel 31 from being displaced downward along the mounting direction of the lens holder 55 with respect to the outer barrel 31 (which coincides with the y-axis). it can. By preventing displacement of the outer peripheral barrel 31 in the housing 20, it is possible to effectively suppress a collision or pressure contact between the protruding piece 35 provided on the outer peripheral barrel 31 and the column portion 25 provided on the housing 20. can do. Moreover, the collision or press-contact between the outer peripheral barrel 31 and the constituent member of the shaft holding portion 40 can be effectively suppressed. In addition, in this embodiment, although the prevention method of rotation suppression of the outer periphery barrel 31 and downward displacement suppression is disclosed, it is good also considering only either one as the prevention object.

  Hereinafter, a specific configuration of the camera module 100 will be described in detail. The wiring board 10 is a general wiring board, for example, a flexible wiring board. The wiring board 10 is electrically connected to the image sensor 12 via a solder bump or the like, and functions as a transmission path for a control signal input to the image sensor chip 12 and a video signal output from the image sensor chip 12. The wiring board 10 functions as a transmission path for driving voltage input to the piezo element 50.

  The IR cut filter 13 is a plate-like member that blocks near infrared rays. The top view shape of the IR cut filter 13 is a square. The IR cut filter 13 is fixed to the housing 20.

  The image sensor chip 12 is a solid-state imaging device including a general image sensor such as a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor. A plurality of pixels arranged in a matrix on the XZ plane are formed on the light receiving surface of the image sensor chip 12. Each pixel accumulates electric charge according to the amount of input light by photoelectric conversion. The electric charge accumulated in each pixel is read from each pixel by transfer control and supplied to the subsequent circuit.

  The housing 20 is mounted on the wiring board 10. A convex portion is provided on the lower end surface of the housing 20 and is fitted into an opening (concave portion) provided in the wiring board 10. The housing 20 stores the image sensor chip 12 and the IR cut filter 13 in the lower space, and stores the drive unit 30 and the lens holder 55 in the upper space.

  In order to suppress the entry of extraneous light into the interior of the housing 20, the lower end surface of the housing 20 is fixed to the wiring board 10 via a black adhesive. The housing 20 is manufactured, for example, by molding a black resin. A black resin having good heat resistance and slidability is preferable, and a composite material of potassium titanate fiber and resin is preferable.

  The outer peripheral barrel 31 is a hollow cylindrical member manufactured by molding a plastic material, for example. The outer barrel 31 extends along the optical axis AX of the lens. A thread groove extending in a spiral shape is formed on the inner peripheral surface of the outer peripheral barrel 31. A lens holder 55 is screwed into the outer peripheral barrel 31. The outer peripheral barrel 31 functions as a receiving member that receives and holds the lens holder 55.

  As described above, the protrusion 33 and the protruding piece 35 are provided on the outer peripheral side surface of the outer peripheral barrel 31. The protrusion 33 and the protruding piece 35 are convex portions extending in a direction away from the outer peripheral side surface of the outer peripheral barrel 31. The protrusion 33 and the protruding piece 35 also extend along the y-axis direction. The length of the protrusion 33 in the y-axis direction is sufficiently longer than the length of the protrusion 35 in the y-axis direction. By sufficiently securing the length of the protrusion 33 in the y-axis direction, a sufficient contact area between the positioning jig and the protrusion 33 can be ensured.

  The protrusion 33 is a portion with which a jig introduced into the housing 20 is engaged via an introduction port OP <b> 2 provided in the lid 60. By holding the protrusion 33 with the jig, the outer peripheral barrel 31 can be suitably fixed in the housing 20. Thereby, when the lens holder 55 is screwed into the outer barrel 31, the outer barrel 31 can be effectively prevented from being displaced according to the force applied to the lens holder 55.

  The projecting piece 35 is a convex portion extending in a direction away from the outer peripheral side surface of the outer peripheral barrel 31. The projecting piece 35 is provided to prevent the outer peripheral barrel 31 from rotating in the process of displacing the outer peripheral barrel 31 according to the driving of the piezo element 50 during the actual operation of the camera module 100.

  As described above, the piezo element 50 and the drive shaft 51 are fixed to the outer peripheral side surface of the outer peripheral barrel 31. The piezo element 50 is a general piezoelectric element in which ceramic layers (piezoelectric layers) are laminated. A set of electrode terminals is provided on a set of side surfaces of the piezoelectric element 50. A set of wirings is connected to the set of electrode terminals. The piezoelectric element 50 expands and contracts in the y-axis direction by applying a drive voltage to the other electrode terminal while one electrode terminal is grounded.

  The drive shaft 51 is a rod-like body whose longitudinal direction is the y-axis direction. The drive shaft 51 is bonded and fixed on one surface of the piezo element 50. Note that the drive shaft 51 may be fixed to the piezo element 50 by a method other than bonding. The method of connecting the piezo element 50 and the drive shaft 51 is arbitrary, and the drive shaft 51 and the piezo element 50 may be connected to each other by fitting.

  The drive shaft 51 transmits the vibration generated in the piezo element 50 to the shaft holding unit 40. The shaft holding unit 40 holds the drive shaft 51 in a slidable state and is fixed to the housing 20. Accordingly, the vibration generated in the piezo element 50 displaces the piezo element 50, the drive shaft 51, and the outer barrel 31 with respect to the housing 20 and the shaft holding portion 40.

  The drive shaft 51 is preferably lightweight and highly rigid. The drive shaft 51 is made of a material having a specific gravity of 2.1 or less. More preferably, the drive shaft 51 is made of a material having a specific gravity of 2.1 or less and an elastic modulus of 20 GPa or more. More preferably, the drive shaft 51 is made of a material having a specific gravity of 2.1 or less and an elastic modulus of 30 GPa or more. Thereby, the resonance frequency can be shifted to the high frequency side, and a continuous usable frequency band can be obtained.

  The drive shaft 51 is preferably molded from glassy carbon, fiber reinforced resin, or epoxy resin. Particularly preferred are glassy carbon composites containing graphite, fiber reinforced resins and glass containing carbon, and epoxy resin composites containing carbon.

  The configuration of the shaft holder 40 will be described later.

  The lens holder 55 is a lens holder that holds a lens system. The lens holder 55 includes a cylindrical portion that extends along the optical axis AX and a flat plate portion that functions as a diaphragm. A screw groove extending in a spiral shape is formed on the outer peripheral side surface of the lens holder 55. By rotating the lens holder 55 in a state in which the screw groove formed on the outer peripheral side surface of the lens holder 55 and the screw groove formed on the inner peripheral surface of the outer barrel 31 are fitted together, the lens holder 55 is 31 is screwed.

  The lid 60 is a flat member having an opening at a position corresponding to the optical axis AX of the lens. The lid 60 has an introduction port OP1 for introducing the lens holder 55 into the housing 20 and an introduction port OP2 for introducing a jig described later into the housing 20. The lens holder 55 and the jig are introduced into the housing 20 through the opening provided in the lid 60. The lid 60 is manufactured, for example, by molding a black resin. The drive unit 30 is confined in the housing 20 by attaching the lid 60 to the housing 20.

  The cover plate (cover member) 65 is a flat plate member for closing the introduction port OP <b> 2 provided in the lid 60. By closing the introduction port OP2 with the cover plate 65, intrusion of dust into the housing 20 can be effectively prevented. When the front surface of the lid 60 is directly attached to a window plate (transparent substrate) or the like attached to a casing such as a mobile phone, the introduction port OP2 of the lid 60 is blocked by the window plate itself. In this way, a member included in the main body into which the camera module 100 should be incorporated may be used as the cover member.

  FIG. 4 shows a top view of the camera module. FIG. 5 is a schematic diagram showing a schematic cross-sectional configuration of the camera module along the dotted line AA of FIG. FIG. 6 is a schematic diagram showing a schematic cross-sectional configuration of the camera module along the dotted line BB in FIG. FIG. 7 shows a top view of the camera module before the lens holder 55 is attached to the outer peripheral barrel 31. FIG. 8 is a schematic diagram showing a schematic cross-sectional configuration of the camera module along the dotted line CC in FIG. FIG. 9 is a schematic diagram showing a schematic cross-sectional configuration of the camera module along the dotted line DD in FIG. In the camera module shown in FIGS. 4 to 9, the outer peripheral barrel 31 is located closest to the image sensor chip 12 side.

  As shown in FIGS. 5 and 6, the diameter W1 of the lens holder 55 is narrower than the opening diameter W2 of the introduction port OP1 provided in the lid 60. Therefore, after attaching the lid 60 to the housing 20, the lens holder 55 can be screwed into the outer barrel 31 via the introduction port OP <b> 1 of the lid 60. 8 and 9, the inner diameter W3 of the outer peripheral barrel 31 is narrower than the opening diameter W2 of the introduction port OP1 provided in the lid 60. The maximum diameter W4 of the lens holder 55 is wider than the opening diameter W2 of the introduction port OP1 provided in the lid 60.

  As shown in FIGS. 5 and 6, the lens holder 55 holds the lenses L1 to L4. The specific configuration of the lens system held by the lens holder 55 is arbitrary.

  As shown in FIG. 5, a set of shaft holding plates 32 is provided on the outer peripheral side surface of the outer peripheral barrel 31. Each shaft holding plate 32 extends in a direction away from the outer peripheral side surface of the outer peripheral barrel 31. The shaft holding plate 32 a holds the upper end portion of the drive shaft 51. The shaft holding plate 32 b holds the lower end portion of the drive shaft 51. The drive shaft 51 is press-fitted into an opening provided in the shaft holding plate 32. However, the drive shaft 51 may be bonded and fixed to the shaft holding plate 32 instead of or together with the press-fitting. A shaft holding portion 40 is disposed between the pair of shaft holding plates 32. By disposing the shaft holding plates 32a and 32b at a predetermined interval along the y-axis direction, the movement range of the outer peripheral barrel 31 can be suitably restricted.

  As shown in FIG. 5, the convex portion provided on the lower end surface of the housing 20 is fitted into the opening of the wiring board 10. Thereby, the housing 20 is suitably positioned and fixed with respect to the wiring board 10.

  As shown in FIG. 6, the housing 20 is provided with a partition wall 22 that separates the upper and lower storage spaces. The interval H1 between the upper surface of the partition wall 22 and the lower end surface 31a of the outer peripheral barrel 31 is about 0.1 mm. The distance between the upper surface of the partition wall 22 and the lower end surface 33a of the protrusion 33 is about 1 mm. The lower end surface 33 a of the protrusion 33 is located above the lower end surface 31 a of the outer peripheral barrel 31. As a result, an arrangement space for the jig can be secured between the protrusion 33 and the partition wall portion 22. By supporting the protrusion 33 with the jig, it is possible to effectively suppress the outer barrel 31 from being inclined downward when the lens holder 55 is screwed into the outer barrel 31.

  As shown in FIG. 10, the top view shape of the housing 20 is a rectangular shape, and includes side wall portions 21 (21 a to 21 d). The casing 20 is provided with four corners C1 to C4. The corner C1 is a corner between the side wall 21c and the side wall 21d. The corner C2 is a corner between the side wall 21d and the side wall 21a. The corner C3 is a corner between the side wall 21a and the side wall 21b. The corner C4 is a corner between the side wall 21b and the side wall 21c.

  A set of connection terminals 81 is provided at the corner C1. The corner portion C2 is provided with a piezo element 50, a drive shaft 51, and a shaft holding portion 40. A protrusion 33 is provided at the corner C3. The corner portion C4 is provided with a protrusion 33 and a column portion 25. Note that the protrusion 33 extends along a diagonal line connecting the corner portion C1 and the corner portion C3. The projecting piece 35 extends along a diagonal line connecting the corner portion C2 and the corner portion C4.

  With the demand for miniaturization of the camera module 100, the free space in the housing 20 is extremely small, and as shown in FIG. 10, the distance between the side walls 21 a to 21 d of the housing 20 and the outer barrel 31 is extremely narrow. . By setting the position of the projection 33 at the corner of the housing 20, it becomes possible to insert a jig of an appropriate size into the housing 20 to firmly grip the projection 33 of the outer peripheral barrel 31.

  As shown in FIG. 10, the connection terminal 81 is a plate-like conductive member (for example, a metal plate). The outer end of the connection terminal 81 is connected to the wiring formed on the wiring board 10. The inner end of the connection terminal 81 is connected to the electrode terminal of the piezo element 50 via a lead wire 52. The connection terminal 81a is connected to the electrode terminal 50a of the piezo element 50 via the lead wire 52a. The connection terminal 81b is connected to the electrode terminal 50b of the piezo element 50 via the lead wire 52b. The shaft holding part 40 is partially exposed from the outer peripheral side surface of the housing 20.

  At the corner portion C4 of the housing 20, a projecting piece 35 and a column portion 25 are disposed. The projecting piece 35 and the column part 25 function as a rotation restraining part 90 that restrains the rotation of the outer peripheral barrel 31.

  The column part 25 provided in the housing | casing 20 has the narrow part 25a and the wide part 25b. The narrow portion 25 a is coupled to the inner peripheral side surface of the housing 20. The wide portion 25b is disposed between the protruding piece 35a and the protruding piece 35b. A clearance is provided between the wide portion 25 b and the projecting piece 35. Ideally, the outer peripheral barrel 31 moves in a manner in which the protruding piece 35 does not come into contact with the column portion 25. However, the barrel may rotate slightly in the process of moving forward or backward. By providing the projecting piece 35 and the column portion 25, it is possible to suppress the rotation of the outer peripheral barrel 31.

  As shown in FIG. 11, the shaft holding portion 40 includes a main body portion 41, a presser plate (plate member) 42, a spring (elastic body) 43, and a presser plate (plate member) 44. In the direction away from the drive shaft 51, the presser plate 42, the spring 43, and the presser plate 44 are arranged in this order. The main body 41 has an opening through which the drive shaft 51 is inserted. Further, the main body 41 has a space for accommodating the presser plate 42, the spring 43, and the presser plate 44. The presser plate 42 is a rectangular flat plate member. The spring 43 is a general coil spring. The presser plate 44 is a rectangular flat plate member.

  The presser plate 42, the spring 43, and the presser plate 44 are sequentially pushed into the main body 41. The presser plate 42, the spring 43, and the presser plate 44 are fixed in position within the main body 41 by bonding and fixing the presser plate 44 to the main body 41. The spring 43 is confined in the space of the main body 41 by the presser plate 44 and biases the holding plate 42 toward the drive shaft 51. The holding plate 42 is urged toward the drive shaft 51 by a spring 43. The drive shaft 51 is urged inward by the spring 43 through the presser plate 42 and is sandwiched between the main body 41 and the presser plate 42. In this way, the drive shaft 51 and the shaft holding portion 40 are in frictional engagement with each other.

  The holding plate 42 is preferably made of a metal material. For example, the presser plate 42 may be formed of a metal material such as SUS. Accordingly, it is possible to effectively suppress the generation of wear powder from the press plate 42 due to friction between the drive shaft 51 and the press plate 42.

  The diameter of the spring 43 is substantially the same as or slightly smaller than the width of the presser plate 42. The specific configuration of the spring 43 is arbitrary, and other types of elastic bodies (plate springs, resin rubber, etc.) may be used. The main body 41 is manufactured by molding a resin with a mold. The holding plates 42 and 44 are manufactured by press molding of a metal plate or a resin plate.

  The main body 41 is preferably made of a metal material. When the main body 41 is made of resin, wear powder may be generated due to friction with the drive shaft 51. In order to suppress the occurrence of such a problem, here, the main body 41 is manufactured by forming a zinc alloy. In addition, you may employ | adopt not only a zinc alloy but an aluminum alloy and another metal material.

  As shown in FIG. 11, the width along the axis Lx <b> 1 of the presser plate 44 is narrower than the width along the axis Lx1 of the presser plate 42. As a result, the spring 43 can be disposed at a position closer to the inner surface of the housing 20, and the camera module 100 can be downsized.

  The spring 43 biases the presser plate 42 in a direction forming 90 degrees with respect to the arrangement direction of the drive shaft 51 as viewed from the outer peripheral barrel 31. In other words, the spring 43 urges the presser plate 42 along the axis Lx2 that forms 90 degrees with respect to the axis Lx1 that coincides with the arrangement direction of the drive shaft 51 as viewed from the outer peripheral barrel 31. Thereby, the arrangement space of the shaft holding portion 40 can be effectively reduced, and the camera module 100 can be reduced in size. The angle formed by the axis Lx1 and the axis Lx2 is not limited to 90 degrees. The angle formed by the axis Lx1 and the axis Lx2 may be 45 to 135 degrees.

  FIG. 12 shows a schematic perspective view of the outer peripheral barrel. FIG. 13 shows a schematic side view of the outer peripheral barrel. As shown in FIG. 12, a thread groove is provided on the inner peripheral surface of the outer peripheral barrel 31, and various special structures are provided on the outer peripheral side surface. The lens holder 55 and the drive shaft 51 are directly attached to the outer peripheral barrel 31. The piezo element 50 is attached to the outer peripheral barrel 31 via a drive shaft 51. As shown in FIGS. 12 and 13, the protrusion 33 of the outer peripheral barrel 31 is added to the cylindrical portion of the outer peripheral barrel 31 in a back form. By holding and supporting the protrusion 33 with a jig, the position of the outer peripheral barrel 31 is fixed in the housing 20, and in this state, the lens holder 55 can be stably screwed into the outer peripheral barrel 31. Become.

  As shown in FIG. 14, when the camera module 100 is viewed from the top before the lens holder 55 is attached to the outer peripheral barrel 31, the entire imaging region 12 a of the image sensor chip 12 is visually recognized through the introduction port OP <b> 1 of the lid 60. Can do. Similarly, when the camera module 100 is viewed from above, the protrusion 33 can be viewed through the introduction port OP2 of the lid 60. A jig can be introduced into the housing 20 through the introduction port OP2 of the lid 60. Note that the introduction port OP1 and the introduction port OP2 are not necessarily formed continuously. The introduction port may be provided for the housing 20 instead of the lid 60 or in addition to the lid 60. As shown in FIG. 14, the diagonal width W5 of the imaging region 12a is provided on the lid 60 or narrower than the opening width W2 of the introduction port OP1. Although the top view shape of the imaging region 12a is substantially square, it should not be limited to this.

  A method for manufacturing the camera module 100 will be described with reference to FIGS. 15 to 19 are process diagrams for explaining a method for manufacturing the camera module 100.

  First, the camera module is assembled to the state shown in FIG. For example, the housing 20, the drive unit 30, and the lid 60 are mounted on the jig 350 in this order. On the upper surface of the jig 350, a recess for receiving the lower end portion of the housing 20 is formed. By disposing the housing 20 in the recess of the jig 350, the housing 20 is attached to the jig 350. At this time, the casing 20 may be positioned with respect to the jig 350 by bringing the outer peripheral side face of the casing 20 into contact with the inner peripheral side face of the concave portion of the jig 350.

  Although the assembly method of the drive unit 30 is arbitrary, for example, it may be assembled as follows. In a state where the shaft holding portion 40 is disposed between the pair of shaft holding plates 32, the drive shaft 51 is inserted into the opening of the shaft holding plate 32 and the shaft holding portion 40. Next, the pressing plate 42, the spring 43, and the pressing plate 44 are attached to the main body portion 41 of the shaft holding portion 40. Next, the piezo element 50 is bonded and fixed to the drive shaft 51. Next, the shaft holding part 40 is fitted to the housing 20. In this way, the drive unit 30 is attached to the housing 20.

  Next, as shown in FIG. 15B, rod-shaped jigs 301 and 302 are introduced into the housing 20 through the introduction port OP <b> 2 of the lid 60. The jigs 301 and 302 are configured to be sufficiently thin, and can be easily inserted into the housing 20 through the introduction port OP2 of the lid 60. The method for introducing the jigs 301 and 302 into the housing 20 is arbitrary. For example, the jigs 301 and 302 are attached to the tip of the robot arm, and the robot arm is operated as intended, so that the jigs 301 and 302 are introduced into the housing 20 through the introduction port OP2 of the lid 60. Good to do.

  Next, as illustrated in FIG. 15C, the protrusions 33 are sandwiched and supported by jigs 301 and 302. Note that the tip of the jig 302 protrudes toward the jig 301 side. In other words, the tip portion of the jig 302 is configured in an L shape. The outer peripheral barrel 31 can be suitably supported by bringing the surface of the protrusion 302 extending toward the jig 301 into contact with the lower end surface 33 a of the protrusion 33. When the robot arm is used as described above, the distance between the jigs 301 and 302 is narrowed by controlling the robot arm, whereby the protrusions 33 are clamped between the jig 301 and the jig 302.

  Next, as schematically shown in FIG. 16, the convex portion 55 a provided on the front surface of the lens holder 55 is clamped by the jig 200.

  Next, as schematically shown in FIG. 17, the lens holder 55 is screwed into the outer peripheral barrel 31 by rotating the jig 200 that holds the lens holder 55. The lens holder 55 is also rotated according to the rotation of the jig 200, and the lens holder 55 is screwed into the outer peripheral barrel 31. After the lens holder 55 is completely screwed into the outer peripheral barrel 31, the rotation of the jig 200 is stopped and the holding of the lens holder 55 by the jig 200 is released. Thereafter, the holding of the outer peripheral barrel 31 by the jigs 301 and 302 is released. When the lens holder 55 is rotated by the jig 200, the outer barrel 31 is firmly held by the jigs 301 and 302 and supported by the jig 302. Therefore, it is possible to effectively suppress the outer peripheral barrel 31 from rotating and being displaced downward according to the screwing of the lens holder 55 into the outer peripheral barrel 31.

  Next, the semi-finished product (including the housing 20, the drive unit 30, and the lens unit 55) is removed from the jig 350, and the removed semi-finished product is mounted on the wiring board 10 on which the image sensor chip 12 is mounted. The connection terminals 81 that are incorporated in the housing 20 in advance and the terminals of the piezoelectric element 50 are connected by lead wires 52. Next, as schematically shown in FIG. 18, the cover plate 65 is fitted to the lid 60, and the cover plate 65 is fixed to the lid 60 with an adhesive or the like. In this way, the camera module 100 is completed as shown in FIG. The IR cut filter 13 is preferably fixed to the housing 20 in advance.

  In the present embodiment, as apparent from the above description, the lens holder 55 is screwed into the outer barrel 31 while the outer barrel 31 is held by the jigs 301 and 302. Thereby, when the lens holder 55 is screwed into the outer barrel 31, it is possible to effectively suppress the outer barrel 31 from rotating and being displaced downward.

  The outer peripheral barrel 31 is only connected to the housing 20 via the drive shaft 51 and the shaft holding portion 40. Therefore, if the lens holder 55 is screwed into the outer barrel 31 without fixing the position of the outer barrel 31, the outer barrel 31 may rotate in synchronization. Further, if the lens holder 55 is screwed into the outer barrel 31 without supporting the outer barrel 31, the outer barrel 31 may be inclined downward according to the force from above. In such a case, as schematically shown in FIG. 39, there is a possibility that the projecting piece 35 and the column part 25 collide at the location P1. In some cases, as schematically shown in FIG. 39, the drive shaft 51 and the presser plate 42 may come into pressure contact with each other at the point P2, and friction powder may be generated.

  In the present embodiment, as apparent from the above description, when the lens holder 55 is screwed into the outer barrel 31, the outer barrel 31 is held by a jig. Accordingly, it is possible to effectively suppress the outer peripheral barrel 31 from rotating and being displaced downward according to the screwing of the lens holder 55 into the outer peripheral barrel 31. For example, the protrusion 35 of the outer barrel 31 is chipped or scratched, the strength of the protrusion 35 of the outer barrel 31 is deteriorated, the surface of the protrusion 35 of the outer barrel 31 is scraped and wear powder is generated, It is possible to effectively suppress generation of friction powder due to friction between the drive shaft 51 and the presser plate 42.

  In the present embodiment, the protrusion 33 is a convex portion that extends outward from the outer peripheral side surface of the outer peripheral barrel 31. Thereby, the jig can be easily brought into contact with the protrusion 33.

  In the present embodiment, the protrusion 33 is disposed at a corner of the housing 20. This makes it possible to introduce a jig of an appropriate size into the housing 20 to firmly grip the protrusion 33 while avoiding an increase in the size of the housing 20.

  In the present embodiment, the protrusion 33 is long in the y-axis direction. Thereby, a sufficient contact area between the jig and the protrusion 33 can be ensured.

  In the present embodiment, the protrusion 33 is configured so that the protrusion 33 can be supported by a jig. Specifically, the lower end surface of the protrusion 33 is located above the lower end surface of the outer peripheral barrel 31. Accordingly, the projection 33 can be suitably supported by the jig, and the outer barrel 31 can be effectively prevented from being displaced downward when the lens holder 55 is screwed into the outer barrel 31.

  In the present embodiment, the introduction port OP <b> 2 is provided for the lid 60. The jig can be easily introduced into the housing 20 from above. Further, since the protrusion 33 of the outer peripheral barrel 31 can be visually recognized from above through the introduction port OP2, the jig can be brought into contact with the protrusion 33 of the outer peripheral barrel 31 more reliably.

  Further description will be given with reference to FIGS. FIG. 20 shows a mobile phone (electronic device) in which a camera module is incorporated. FIG. 21 is a schematic block diagram showing the system configuration of the camera module 100. FIG. 22 is an explanatory diagram for explaining the relationship between the driving voltage waveform and the displacement of the lens holder.

  The camera module 100 is mounted in a mobile phone 190 shown in FIG. The mobile phone 190 has an upper body 191, a lower body 192, and a hinge 193. The upper main body 191 and the lower main body 192 are both plastic flat members and are connected via a hinge 193. The upper body 191 and the lower body 192 are configured to be opened and closed by a hinge 193.

  The upper body 191 has a display unit 194 on its inner surface. The display unit 194 displays information (name, phone number) for identifying the called party, address information stored in the storage unit of the mobile phone 190, and the like. A liquid crystal display device is incorporated under the display portion 194.

  The lower main body 192 has a plurality of buttons 195 on its inner surface. The operator of the mobile phone 190 operates the button 195 to open the address book, make a call, set the manner mode, and operate the mobile phone 190 as intended. The operator of the mobile phone 190 activates the camera module 100 in the mobile phone 190 based on operating this button 195.

  A system configuration for operating the camera module 100 will be described with reference to FIG. As shown in FIG. 21, the output of the image acquisition unit 180 is connected to the controller 181. The output of the controller 181 is connected to a drive voltage generation circuit (drive voltage supply unit) 182. The output of the drive voltage generation circuit 182 is connected to the vibration source 183. The image acquisition unit 180 is equivalent to the image sensor chip 12 described above. The vibration source 183 is equivalent to the piezo element 50 described above.

  The controller 181 is a CPU incorporated in the mobile phone 190, and generates various commands by executing a program. The controller 181 activates the function of the camera module according to the operation of the mobile phone 190 by the operator.

  The controller 181 has a function of adjusting the moving speed of the outer peripheral barrel 31. The controller 181 determines whether or not the lens held in the lens holder 55 is in the in-focus position based on the processing on the image transmitted from the image acquisition unit 180, and the lens held in the lens holder 55. In order to make the in-focus state, the moving direction and moving amount of the outer peripheral barrel 31 are calculated. The controller 181 controls the drive voltage generation circuit 182 so that the outer barrel 31 moves at a high speed when moving the lens held by the lens holder 55 from a position away from the focusing position to the focusing position. When the controller 181 moves the lens held by the lens holder 55 to the in-focus position within a distance close to the in-focus position, the controller 181 controls the drive voltage generation circuit 182 so that the outer peripheral barrel 31 moves at a low speed. The drive voltage generation circuit 182 supplies a sawtooth drive voltage to the vibration source 183 in accordance with a control signal supplied from the controller 181. The specific configuration of the drive voltage generation circuit 182 is arbitrary. The vibration source 183 expands and contracts according to the sawtooth drive voltage supplied from the drive voltage generation circuit 182 to generate vibration. The outer barrel 31 (the lens holder 55) is displaced toward the object side or the imaging side along the optical axis AX in accordance with the vibration generated by the vibration source 183. The optical axes AX of the lenses L1 to L4 intersect perpendicularly to the front surface of the image sensor chip 12.

  With reference to FIG. 22, a supplementary explanation will be given on the relationship between the drive voltage waveform supplied from the drive voltage generation circuit 182 to the vibration source 183 (piezo element 50) and the displacement of the outer barrel 31.

  The drive voltage generation circuit 182 applies a sawtooth drive voltage waveform to the piezo element 50 as shown in FIG. As shown in FIG. 22, the drive voltage rises steeply between time t1 and time t2. The driving voltage slowly falls between time t2 and time t3. The outer barrel 31 is displaced between time t1 and time t2. The outer peripheral barrel 31 is not displaced between time t2 and time t3. By continuously supplying a sawtooth drive voltage to the piezo element 50, the outer barrel 31 is displaced to one side. When the outer peripheral barrel 31 is moved in the reverse direction, a sawtooth drive voltage waveform that falls sharply and rises slowly may be applied to the piezo element 50.

  The specific configuration of the drive voltage generation circuit 182 is arbitrary. For example, the above-described drive voltage waveform may be generated by connecting a plurality of switching elements between a power supply potential and a ground potential and controlling on / off of these elements.

Embodiment 2
The second embodiment will be described with reference to FIGS. FIG. 23 is a schematic perspective view of the camera module. FIG. 24 is a schematic perspective view of a barrel. FIG. 25 is a schematic bottom view of the barrel. FIG. 26 is a schematic top view of the housing. FIG. 27 is a schematic top view of the jig. 28 to 31 are schematic manufacturing process diagrams of the camera module.

  In the present embodiment, the outer peripheral barrel 31 is positioned by a jig by a method / mode different from the first embodiment. Even in such a case, the same effect as that described in the first embodiment can be obtained. This will be specifically described below.

  As shown in FIG. 23, the camera module 100 has a configuration substantially similar to that of the first embodiment. As shown in FIGS. 24 and 25, the outer peripheral barrel 31 is provided with a plurality of recesses (jig engaging portions) 36 instead of the protrusions 33 shown in the first embodiment. As shown in FIGS. 24 and 25, a plurality of depressions 36 are provided between the lower end surface and the outer peripheral side surface of the outer peripheral barrel 31. As shown in FIG. 24, the recess 36 extends along the y-axis. As shown in FIG. 25, the outer barrel 31 is provided with four depressions 36. The four depressions 36 are arranged at a substantially constant interval. By disposing the plurality of depressions 36 at regular intervals, the outer peripheral barrel 31 can be held more stably. The number of depressions 36 is arbitrary, and may be one or more. By providing two or more depressions 36, it is possible to more suitably fix the position of the outer peripheral barrel 31. Although the hollow shape is a semicircular shape in FIGS. 23 to 25, it may be any shape such as a triangular shape or a rectangular shape.

  As shown in FIG. 26, the partition wall portion 22 of the housing 20 is provided with four inlets 27 at positions corresponding to the four depressions 36 of the outer peripheral barrel 31. The introduction port 27a and the introduction port 27c are disposed to face each other through an opening OP3 provided in the partition wall portion 22. The introduction port 27b and the introduction port 27d are disposed to face each other through an opening OP3 provided in the partition wall portion 22.

  As schematically shown in FIG. 27, the jig 400 used for holding the outer peripheral barrel 31 has four holding columns 401. The holding column 401 is introduced into the housing 20 through the introduction port 27 provided in the partition wall portion 22 of the housing 20 and abuts against the recess 36 of the outer peripheral barrel 31 attached to the housing 20. Thereby, the position of the outer peripheral barrel 31 is fixed by the jig 400. Also in this embodiment, as in the first embodiment, the jig suppresses the rotation and downward displacement of the outer barrel 31 when the lens holder 55 is screwed into the outer barrel 31.

  A method for manufacturing the camera module 100 will be described with reference to FIGS.

  As shown in FIG. 28, the housing 20 is installed on the jig 400. As a result, the holding columns 401a to 401d of the jig 400 are inserted into the introduction ports 27a to 27d provided in the housing 20, respectively. That is, the state shown in FIG. 29 is obtained. The jig 400 is provided with two concave portions 402. The convex portion provided on the lower end surface of the housing 20 is fitted into the concave portion 402 provided on the jig 400. A method for positioning the housing 20 with respect to the jig 400 is arbitrary. For example, both may be positioned by making the shape of the recess of the jig 400 correspond to the outer peripheral shape of the housing 20. In this case, both are suitably positioned by contact between the outer peripheral side surface (including the corner) of the housing 20 and the inner peripheral side surface (including the corner) of the recess. You may position both by inserting the convex part provided in the lower end surface of the housing | casing 20 with respect to the hole provided in the jig | tool 400. FIG.

  Next, the drive unit 30 is attached to the housing 20. A lid 60 is attached to the housing 20. Thereafter, as schematically shown in FIG. 30, the lens holder 55 is held by the jig 200, and the lens holder 55 is disposed on the outer peripheral barrel 31.

  Next, as schematically shown in FIG. 31, the jig 200 is rotated, and the lens holder 55 is screwed into the outer peripheral barrel 31. At this time, as apparent from the above description, the outer peripheral barrel 31 is positioned by the jig 400. Therefore, in the process in which the lens holder 55 is screwed into the outer peripheral barrel 31 according to the rotation of the jig 200, the outer peripheral barrel 31 is effectively suppressed from rotating and displaced downward. That is, also in the present embodiment, the same effect as in the first embodiment can be obtained.

  In the present embodiment, by installing the housing 20 on the jig 400 and attaching the drive unit 30 to the housing 20, the recess 36 of the outer peripheral barrel 31 automatically becomes the holding column 401 of the jig 400. As a result, the outer peripheral barrel 31 is fixed in position relative to the jig 400. Since the jig does not need to be individually operated from above as in the first embodiment, the outer barrel 31 can be fixed by a technique more suitable for mass production.

Embodiment 3
The third embodiment will be described with reference to FIGS. FIG. 32 is a schematic perspective view of the camera module. FIG. 33 is a schematic perspective view of the camera module. FIG. 34 is a schematic top view of the camera module. FIG. 35 is a schematic top view of the camera module. FIG. 36 is a schematic diagram illustrating a schematic cross-sectional configuration of the camera module taken along line EE in FIG. 35.

  In this embodiment, the outer peripheral barrel 31 is driven on a principle different from that of the above-described embodiment. Even in such a case, the same effect as that of the above-described embodiment can be obtained. That is, the driving principle of the driving device incorporated in the camera module is arbitrary.

  As shown in FIGS. 32 to 34, similar to the first embodiment, the outer peripheral side surface of the outer peripheral barrel 31 is provided with a projection 33 that functions as a jig engaging portion. The outer peripheral barrel 31 can be fixed by gripping the protrusion 33 with a jig as in the first embodiment. The lid 60 is not provided with an introduction port OP2 for introducing a jig into the housing 20. In the present embodiment, the lens holder 55 is screwed into the outer peripheral barrel 31 before the lid 60 is attached to the housing 20. Therefore, even if the introduction port OP <b> 2 is not provided in the lid 60, the outer peripheral barrel 31 can be fixedly held by suitably holding the protrusion 33 of the outer peripheral barrel 31 with the jig.

  As shown in FIGS. 32 to 34, a shaft holding portion 70 that holds the drive shaft 51 is provided on the outer peripheral side surface of the outer peripheral barrel 31. The shaft holding part 70 includes a pressing plate 71 and a spring 72. As shown in FIGS. 32 to 34, the pressing plate 71 is provided with a rotating shaft 73. The rotating shaft 73 is held by the holding structure of the shaft holding unit 70. One end of the pressing plate 71 is urged by a spring 72, whereby the drive shaft 51 is pressed by the other end of the pressing plate 71. In this way, the drive shaft 51 is frictionally engaged with the shaft holding portion 70. In other words, the drive shaft 51 is held by the shaft holding portion 70 in a slidable state along the y axis.

  As shown in FIG. 36, the piezo element 50 is fixed on the wiring board 10. The drive shaft 51 is bonded and fixed on the piezo element 50. The outer peripheral barrel 31 is engaged with the drive shaft 51 through the shaft holding portion 70 in a slidable state.

  In the present embodiment, unlike the above-described embodiment, when the voltage waveform Vs1 shown in FIG. 22 is applied to the piezo element 50, the outer barrel 31 is not displaced on the drive shaft 51 between times t1 and t2. The outer barrel 31 is displaced on the drive shaft 51 between time t2 and time t3. The present invention can also be applied to a camera module that incorporates driving devices having different operating principles.

  Also in the present embodiment, the camera module 100 is manufactured through the same manufacturing process as that of the above-described embodiment, but the manufacturing process also differs depending on the driving principle. For example, the camera module 100 is manufactured as follows.

  First, the drive shaft 51 is fixed to the piezo element 50. Next, the piezo element 50 is disposed at a predetermined location on the wiring board 10. Next, the image sensor chip 12 is mounted on the wiring board 10. Next, the IR cut filter 13 is fixed to the housing 20. Next, the housing 20 is mounted on the wiring board 10. At this time, the upper portion of the piezo element 50 and the drive shaft 51 are introduced into the upper space of the housing 20 through the opening provided in the partition wall portion 22 of the housing 20. Next, the shaft holding part 70 of the outer peripheral barrel 31 to which the lens holder 55 is screwed is engaged with the drive shaft 51. The method for screwing the lens holder 55 into the outer peripheral barrel 31 is the same as that described in the first embodiment. Specifically, as in the case shown in FIG. 15, the protrusion 33 of the outer peripheral barrel 31 is held by the jigs 301 and 302. Next, as in the case shown in FIGS. 16 and 17, the lens holder 55 is screwed into the outer peripheral barrel 31. Next, the lid 60 is attached to the housing 20. In this way, the camera module 100 is manufactured. Note that the outer peripheral barrel fixing method described in the second embodiment may be applied to the driving device shown in the present embodiment. As a result, the same effects as those described in the above embodiment can be obtained.

  Variations relating to the first to third embodiments will be described with reference to FIG. As shown in FIG. 37, the image sensor chip 12 may be bump-connected to the IR cut filter 13. By fixing the IR cut filter 13 to the housing 20, the relative positional relationship between the image sensor chip 12 and the housing 20 can be determined, and the imaging system is set in a manner that suppresses the placement error. be able to.

  A wiring pattern is formed on the back surface of the IR cut filter 13. Terminals provided on the image sensor chip 12 are connected to the wiring pattern via bumps. The wiring pattern of the IR cut filter 13 is connected to the wiring pattern on the wiring substrate 10 via bumps. In this way, the image sensor chip 12 and the wiring board 10 are electrically connected via the wiring pattern formed in the IR cut filter 13. The wiring board 10 is provided with a connector 10p. Image data generated by the camera module 100 is externally output via the connector 10p. Electric power, control signals, and the like are input to the camera module from the outside via the connector 10p.

  Variations relating to the first to third embodiments will be described with reference to FIG. The variation of the protrusion 33 shown in FIG. 38 is shown. The side view shape of the protrusion 33 is arbitrary, and should not be limited to a rectangular shape.

  As shown in FIG. 38 (a), the protrusion 33 may be triangular. Even in such a case, the same effect as in the first embodiment can be obtained. In addition, the lower end surface 33a of the protrusion 33 is located above the lower end surface 31a of the outer peripheral barrel 31, as in the first embodiment, thereby securing a jig introduction space.

  As shown in FIG. 38B, a recess 33b may be provided in the protrusion 33, and a jig may be fitted into the recess 33b. Even in such a case, the same effect as in the first embodiment can be obtained. In this case, a jig introduction space is secured by the recess 33b.

  The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, the specific shape of the outer peripheral barrel is arbitrary and should not be limited to a cylindrical member. The number of lenses held by the lens holder is arbitrary. The specific configuration of the housing is arbitrary. The specific configuration of the jig is arbitrary. A jig may be introduced into the casing from the side, not only above and below, and the barrel may be gripped by the jig. The specific arrangement position of the inlet is arbitrary.

100 camera module

DESCRIPTION OF SYMBOLS 10 Wiring board 12 Image sensor chip 13 IR cut filter 20 Case 21 Side wall part 22 Partition part 25 Column part 27 Inlet 30 Drive unit 31 Outer peripheral barrel 31a Lower end surface 32 Axis holding plate 33 Protrusion 35 Projection piece 40 Axis holding part 50 Piezo Element 51 Drive shaft 52 Lead wire 55 Lens holder L1-L4 Lens 60 Lid OP1 Introduction port OP2 Introduction port 65 Cover plate 70 Shaft holding portion 81 Connection terminal 90 Rotation prevention portion

200 Jig 301 Jig 302 Jig 400 Jig 401 Holding column

Claims (16)

A driving device for displacing a driven body with respect to a stationary member,
The driven body includes a movable member to which a lens holding body holding a lens is mounted;
The movable member is provided with a jig engaging portion with which a jig is engaged,
The jig engaging portion is disposed on a plane that intersects the displacement direction of the movable member along the mounting direction of the lens holder relative to the movable member and the mounting direction by the engagement of the jig with the jig engaging portion. A drive device configured to prevent at least one of rotation of the movable member. The movable member is a cylinder surrounding the lens holding body,
The drive device according to claim 1, wherein the jig engaging portion is provided on an outer peripheral side surface of the cylindrical body. The fixed side member includes a polygonal envelope as viewed from above,
The drive device according to claim 1, wherein the jig engaging portion is disposed at a corner portion of the envelope.   The drive device according to any one of claims 1 to 3, wherein a rotation inhibiting portion that inhibits rotation of the movable member is provided on an outer peripheral side surface of the movable member.   5. The driving device according to claim 1, wherein the jig engaging portion extends along a mounting direction of the lens holding body with respect to the movable member.   The driving apparatus according to claim 1, wherein the lens holding body is screwed into the movable member. The fixed side member includes an envelope that surrounds the movable member,
The drive device according to claim 1, wherein the envelope is provided with an introduction port through which the jig can be introduced into the envelope.   The drive according to any one of claims 1 to 7, wherein the jig engaging portion is a convex portion extending with a mounting direction of the lens holding body with respect to the movable member as a longitudinal direction. apparatus. A piezoelectric element;
A drive shaft directly or indirectly engaged with the piezoelectric element,
The drive device according to claim 1, wherein the drive shaft is fixed with respect to the movable member. The envelope is provided with a partition that separates an upper space that accommodates the movable member and a lower space that accommodates an image sensor that captures an image input via the lens,
The drive device according to claim 2, wherein the introduction port is provided in the partition wall.   The drive device according to claim 1, further comprising a lens holder attached to the movable member. A drive device according to claim 11;
An image sensor for acquiring an image input via the lens held by the lens holder;
A camera module comprising: A manufacturing method of a driving device for displacing a driven body including a lens holding body and a movable member to which the lens holding body is mounted with respect to a fixed side member,
Engage a jig with a jig engaging portion provided on the movable member,
At least one of displacement of the movable member along the mounting direction of the lens holder relative to the movable member and rotation of the movable member in a plane intersecting the mounting direction by engagement of the jig with the jig engaging portion. A manufacturing method of a driving device, wherein the lens holding body is attached to the movable member in a state where the blocking is prevented.   The method of manufacturing a driving apparatus according to claim 13, wherein the movable member is supported by the jig from a direction opposite to a mounting direction of the lens holding body with respect to the movable member.   15. The method for manufacturing a driving device according to claim 13, wherein the movable member is supported from a plurality of directions by the jig.   16. The jig according to any one of claims 13 to 15, wherein the jig is introduced into the inside of the envelope through an introduction port provided in the envelope that surrounds the movable member. Manufacturing method of drive device.

Images