Imaging unit

Abstract

To provide an imaging unit which can be reduced in size.SOLUTION: The imaging unit includes an imaging element, a first optical element which is arranged on the object side of the imaging element, a second optical element which is arranged on the object side of the first optical element, a first holding member which holds the imaging element, a second holding member which holds the first optical element, and a third holding member which sandwiches and holds the second optical element and the second holding member between the third holding member and the first holding member. The first holding member has a first hole into which a screw is fastened, a first projection part, and a second projection part and the first hole and the first projection part and the second projection part are arranged in areas facing each other across a light-receiving surface of the imaging element. The second holding member has a second hole into which the screw is inserted. The third holding member has a third hole into which the screw is inserted, a first opening with which the first projection part is engaged, and a second opening with which the second projection part is engaged.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to an imaging unit, and more particularly to an imaging unit equipped with an optical element on the object side of an imaging element. [Background technology]

[0002] In imaging devices such as digital cameras, a cover glass (dummy glass) may be placed in front of the imaging element (on the object side) to protect the imaging element. Also, in imaging devices such as digital cameras, various optical filters such as an IR cut-off filter that cuts infrared (IR) and a low pass filter may be placed in order to improve image quality.

[0003] Patent Documents 1 to 3 disclose techniques for assembling optical elements such as a cover glass and a filter to an imaging element to form a unit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-26564 A [Patent Document 1] JP 2004-312552 A [Patent Document 1] JP 2020-123794 A Summary of the Invention

[0005] One embodiment of the technique of the present disclosure provides an imaging unit that can be miniaturized. [Means for solving the problem]

[0006] (1) An imaging unit comprising: an imaging element, a first optical element arranged on the object side of the imaging element, a second optical element arranged on the object side of the first optical element, a first holding member that holds the imaging element, a second holding member that holds the first optical element, and a third holding member that holds the second optical element and the second holding member by sandwiching them between the first holding member and the first holding member, wherein the first holding member has a first hole into which a screw is fastened, and a first convex portion and a second convex portion, and the first hole, the first convex portion, and the second convex portion are arranged in opposing areas across the light receiving surface of the imaging element, the second holding member has a second hole through which the screw is inserted, and the third holding member has a third hole through which the screw is inserted, a first opening that engages with the first convex portion, and a second opening that engages with the second convex portion.

[0007] (2) The imaging unit according to (1), wherein the second optical element is vibrated.

[0008] (3) The imaging unit according to (1) or (2), wherein the first hole is provided along the optical axis, and the first convex portion and the second convex portion are provided to protrude in a direction intersecting the optical axis.

[0009] (4) An imaging unit described in any one of (1) to (3), wherein the first holding member has a frame-shaped holding portion in which the imaging element is housed, a first hole is provided on an end face of the holding portion, and a first convex portion and a second convex portion are provided on an outer periphery of the holding portion.

[0010] (5) The imaging unit described in (4), wherein the first holding member has a thickness of the holding portion at a position where the first convex portion and the second convex portion are arranged that is thinner than the thickness of the holding portion at a position where the first hole is arranged.

[0011] (6) An imaging unit described in any one of (1) to (5), wherein the first holding member has a third convex portion and a fourth convex portion protruding in the direction of the optical axis, the second holding member has a third opening that engages with the third convex portion, and the third holding member has a fourth opening that engages with the fourth convex portion.

[0012] (7) An imaging unit as described in (6), wherein the second holding member is restricted from moving in a direction intersecting the optical axis by engagement between the third convex portion and the third opening, and the third holding member is restricted from moving in a direction intersecting the optical axis by engagement between the fourth convex portion and the fourth opening.

[0013] (8) An imaging unit described in (6) or (7), wherein the first holding member further has a fifth convex portion protruding in the direction of the optical axis, the second holding member further has a first fifth opening that engages with the fifth convex portion to restrict movement in a direction intersecting the optical axis, and the third holding member further has a second fifth opening that engages with the fifth convex portion to restrict movement in a direction intersecting the optical axis.

[0014] (9) The imaging unit according to (8), wherein the third convex portion and the fourth convex portion have a height-to-width ratio different from that of the fifth convex portion.

[0015] (10) The imaging unit according to (8) or (9), wherein the fifth convex portion is disposed adjacent to the first hole.

[0016] (11) The imaging unit according to any one of (1) to (10), wherein the third holding member has an adhesive portion that is adhered to the first holding member and / or the second holding member.

[0017] (12) The imaging unit according to (11), wherein the third holding member has an adhesive portion in an area facing the first hole across the light receiving surface of the imaging element.

[0018] (13) The imaging unit according to (11) or (12), wherein the third holding member has adhesive portions at both longitudinal ends of a region facing the first hole across the light receiving surface of the imaging element.

[0019] (14) The imaging unit according to any one of (1) to (13), wherein the first holding member is made of a resin molded product and has an open space on the image side of at least the first convex portion and the second convex portion.

[0020] (15) The imaging unit according to (14), wherein the first convex portion and the second convex portion have a tapered shape whose protrusion amount decreases from the image side to the object side.

[0021] (16) The imaging unit according to any one of (1) to (15), wherein the screw is a tapping screw and is fastened into the first hole by self-tapping.

[0022] (17) An imaging unit according to any one of (1) to (16), comprising a fourth holding member that holds the first holding member movably within a plane intersecting the optical axis, and a drive unit that drives the first holding member.

[0023] (18) An imaging unit described in (17), wherein the driving unit is composed of a voice coil motor, the first holding member has a coil holding portion that accommodates and holds the coil of the voice coil motor, and the coil holding portion is arranged adjacent to the area in which the first convex portion and the second convex portion are arranged.

[0024] (19) The imaging unit according to (18), wherein at least a portion of the first convex portion and the second convex portion are arranged to overlap with the coil holding portion.

[0025] (20) The imaging unit according to any one of (17) to (19), wherein the first holding member is made of a resin molded product and has an open space on the image side of the first convex portion and the second convex portion. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a front perspective view showing an example of an imaging unit; [Diagram 2] FIG. 1 is a rear perspective view showing an example of an imaging unit; [Diagram 3] Exploded perspective view of the imaging unit [Figure 4] Perspective view of the fixing part [Diagram 5] Exploded perspective view of the fixing part [Figure 6] Front perspective view of the movable part [Figure 7] Rear perspective view of the movable part [Figure 8] Front view of the moving part [Figure 9] Rear view of moving part [Figure 10] Exploded perspective view of the movable part [Figure 11] Cross-sectional view showing the schematic configuration of a DR unit [Figure 12] Front view of DR unit [Figure 13] Rear view of the DR unit [Figure 14] Exploded perspective view of the DR unit [Figure 15] Exploded perspective view of the DR unit [Figure 16] FIG. 1 is an exploded perspective view showing a holding structure of a DR unit. [Figure 17] Front view of the movable frame with the DR unit attached [Figure 18] Front view of the cover member [Figure 19] FIG. [Figure 20] Rear view of the movable frame DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] [Digital Camera] Here, an example will be described in which the present invention is applied to an imaging unit used in an interchangeable lens digital camera equipped with an In Body Image Stabilizer (IBIS) and Dust Reduction (DR) function. An interchangeable lens digital camera is a digital camera in which lenses can be replaced and attached to a camera body (body). The lens (interchangeable lens) is detachably attached to the camera body via a mount.

[0029] In-body image stabilization is a type of image stabilization that has a mechanism for image stabilization built into the camera body. IBIS uses an image sensor shift type image stabilization mechanism. The image sensor shift type is an image stabilization mechanism that moves the image sensor to reduce image blur caused by camera shake.

[0030] The dust reduction function is a function for removing dust that adheres to an image sensor. The dust reduction function is mainly used in interchangeable lens digital cameras to remove dust that adheres to the image sensor when changing lenses.

[0031] Generally, dust reduction mechanisms are composed of a combination of the following two elements. One is to seal the front of the image sensor with a cover glass (dummy glass). This prevents dust from directly adhering to the light receiving surface of the image sensor. The other is to vibrate the cover glass to shake off any dust adhering to the cover glass. There are two methods for vibrating the cover glass. One is to directly vibrate the cover glass using a vibration means (for example, a piezoelectric element). The other is to indirectly vibrate the cover glass by using an image stabilization mechanism. The method of using an image stabilization mechanism is limited to cases where an image sensor shift type image stabilization mechanism is used.

[0032] Generally, in an interchangeable lens digital camera equipped with an in-body image stabilization function and a dust reduction function, the image stabilization mechanism and the dust reduction mechanism are integrated together with the image sensor into a single unit (imaging unit) that is assembled into the camera body.

[0033] In recent years, there has been a demand for further miniaturization of the camera body in interchangeable lens type digital cameras, which has resulted in a demand for a smaller imaging unit as well.

[0034] On the other hand, in an imaging unit including an image stabilization mechanism and a dust reduction mechanism, each member must be assembled without rattling.

[0035] An imaging unit that includes an image stabilization mechanism and a dust reduction mechanism and that can be made compact will be described below.

[0036] [Imaging unit] 1 and 2 are a front perspective view and a rear perspective view showing an example of an imaging unit.

[0037] In Fig. 1, the x-axis, y-axis, and z-axis are three mutually orthogonal axes. The direction of the x-axis is the horizontal direction (left-right direction), and the direction of the y-axis is the vertical direction (up-down direction). The direction of the z-axis is the direction of the optical axis of the lens (interchangeable lens) attached to the camera body when the imaging unit 1 is attached to the camera body. In the optical axis direction of the lens (z-axis direction), the object side is the front side, and the image side is the rear side.

[0038] The imaging unit 1 shown in Fig. 1 is an imaging unit used in an interchangeable lens digital camera equipped with in-body image stabilization and dust reduction functions. As an example, it is used in a mirrorless single-lens camera. A mirrorless single-lens camera is one classification of digital cameras, and is a general term for digital cameras in which the image is viewed through an electronic view finder (EVF) or a rear monitor instead of the optical viewfinder used in single-lens reflex cameras.

[0039] The imaging unit 1 is an imaging section of a digital camera and includes an image sensor. In this embodiment, the imaging unit 1 is configured as a unit that further includes a camera shake correction mechanism and a dust reduction mechanism.

[0040] The image stabilization mechanism is an image sensor shift type image stabilization mechanism that corrects camera shake by moving the image sensor in a plane perpendicular to the optical axis Zs. The perpendicularity includes a range that is considered to be substantially perpendicular (including so-called nearly perpendicular).

[0041] For the image sensor, the axis that passes through a predetermined reference point Os and is perpendicular to the light receiving surface is defined as the "optical axis Zs of the image sensor." In this embodiment, the center of the light receiving surface is defined as the reference point Os. Therefore, in this embodiment, the axis that passes through the center of the light receiving surface and is perpendicular to the light receiving surface is the optical axis Zs of the image sensor. The center of the light receiving surface includes a range that is substantially recognized as the center (including so-called almost the center). Furthermore, the axis perpendicular to the light receiving surface includes a range that is substantially recognized as perpendicular (including so-called almost perpendicular).

[0042] As described later, in this embodiment, camera shake is corrected by shifting and / or rotating the image sensor within a plane perpendicular (including nearly perpendicular) to the optical axis Zs. Shifting refers to sliding the image sensor within a plane perpendicular (including nearly perpendicular) to the optical axis Zs. In this embodiment, the image sensor is shifted by moving in the x and y directions. The x and y directions are two directions that are perpendicular to each other within a plane perpendicular (including nearly perpendicular) to the optical axis Zs. Rotation refers to rotating the image sensor around the optical axis.

[0043] The dust reduction mechanism of the present embodiment vibrates the cover glass to remove dust, that is, the dust is shaken off by the vibration.

[0044] The imaging unit 1 is attached to a body frame (body chassis) of the camera body (not shown) and disposed within the camera body. In the imaging unit 1 attached to the body frame, the light receiving surface of the image sensor is disposed on the optical axis of the lens (interchangeable lens) attached to the camera body. In addition, in the imaging unit 1 attached to the body frame, the light receiving surface of the image sensor is disposed perpendicular (including nearly perpendicular) to the optical axis of the lens attached to the camera body. In other words, the imaging unit 1 is attached to the body frame so that the optical axis Zs of the image sensor is parallel (including nearly parallel) to the optical axis of the lens attached to the camera body.

[0045] The image sensor has its origin position at the position where the reference point Os is located on the optical axis of the lens attached to the camera body, and its position is controlled based on the origin position. The image sensor located at the origin position has its optical axis Zs coaxial with the optical axis of the lens attached to the camera body.

[0046] It should be noted that the image stabilization function can be turned on and off as desired. When the image stabilization function is turned off, the image sensor is held at the origin position. More specifically, the image stabilization mechanism is controlled so that the image sensor is held at the origin position.

[0047] The type of the image sensor is not particularly limited. As an example, in the present embodiment, a CMOS (Complementary Metal Oxide Semiconductor) image sensor is adopted. In addition, a CCD (Charge Coupled Device) image sensor or the like can also be adopted as the image sensor. The image sensor is an example of an imaging element.

[0048] FIG. 3 is an exploded perspective view of the imaging unit.

[0049] As shown in Fig. 3, the imaging unit 1 including the image stabilization mechanism has a fixed part 10 and a movable part 20. The fixed part 10 is a part that is fixed to the camera body when the imaging unit 1 is assembled to the camera body. The movable part 20 is a part that is movable with respect to the camera body when the imaging unit 1 is assembled to the camera body. The fixed part 10 functions as a holder for the movable part 20, and holds the movable part 20 movably within a plane perpendicular (including nearly perpendicular) to the optical axis Zs.

[0050] [Fixed part] Fig. 4 is a perspective view of the fixing part, and Fig. 5 is an exploded perspective view of the fixing part.

[0051] As shown in FIGS. 4 and 5, the fixed portion 10 is provided with a rear frame 11 and a front frame 12 that form the base of the fixed portion 10.

[0052] The rear frame 11 and the front frame 12 both have a plate-like shape. The rear frame 11 and the front frame 12 are integrated by fastening the front frame 12 to three support columns 13 extending from the rear frame 11 with screws 14. The three support columns 13 function as spacers. The rear frame 11 and the front frame 12 integrated via the three support columns 13 are disposed parallel to each other at a predetermined interval in the front-rear direction (z-axis direction).

[0053] The rear frame 11 and the front frame 12 also function as a yoke for forming a magnetic circuit, and are made of a magnetic material (iron, as an example).

[0054] The front frame 12 is provided with mounting parts 12A for mounting the imaging unit 1 to the body frame of the camera body. The mounting parts 12A are provided at a plurality of locations on the front frame 12. Each mounting part 12A is provided with a hole 12A1 for screwing. The imaging unit 1 is assembled to the camera body by screwing each mounting part 12A to the body frame of the camera body.

[0055] In the present embodiment, the fixing portion 10 constituted by the rear frame 11 and the front frame 12 is an example of a fourth holding member.

[0056] [Movable part] Fig. 6 is a front perspective view of the movable part, Fig. 7 is a rear perspective view of the movable part, Fig. 8 is a front view of the movable part, Fig. 9 is a rear view of the movable part, and Fig. 10 is an exploded perspective view of the movable part.

[0057] As shown in FIGS. 6 to 10, the movable part 20 is provided with a movable frame 21 that serves as a base of the movable part 20.

[0058] The movable frame 21 has an image sensor holding portion 21A and a flange portion 21B. As an example, in the present embodiment, the movable frame 21 is made of a resin molded product. That is, the movable frame 21 is produced by processing a resin such as plastic by a processing method such as injection molding.

[0059] The image sensor holding portion 21A is a holding portion for the image sensor 30. The image sensor holding portion 21A has a rectangular frame shape with a part cut out. The inner periphery (opening) of the image sensor holding portion 21A has a shape corresponding to the shape of the outer periphery of the image sensor 30. The image sensor 30 is attached from the side of the image sensor holding portion 21A by utilizing the cut out portion, and is held in the inner periphery of the image sensor holding portion 21A. As an example, in this embodiment, the image sensor 30 is bonded to the inner periphery of the image sensor holding portion 21A with an adhesive and held. After the image sensor 30 is attached to the cut out portion of the image sensor holding portion 21A, a strip-shaped sheet (light-shielding sheet) 32 having light-shielding properties is attached. In this embodiment, the image sensor holding portion 21A is an example of a first holding member in the narrow sense. Also, the movable frame 21 is an example of a first holding member in the broad sense.

[0060] Flange portion 21B has a plate-like shape and is provided so as to protrude like a brim from the outer periphery of image sensor holding portion 21A. In the present embodiment, as shown in Fig. 8, flange portion 21B is provided so as to protrude upward and to the left side of image sensor holding portion 21A in front view.

[0061] A dust reduction unit (DR unit) 80 is attached to the movable frame 21. The assembly structure of the DR unit 80 will be described later.

[0062] [Moving part retention structure] The movable part 20 is movably held relative to the fixed part 10 via three balls (rolling elements) 31.

[0063] As shown in FIG. 7, the movable frame 21 is provided with ball holding portions 21C at three locations on the back surface. The ball holding portions 21C are holding portions for the balls 31 on the movable portion side. The ball holding portions 21C are formed of rectangular recesses. The balls 31 are accommodated in the ball holding portions 21C and are held by the movable frame 21. A metal plate 21C1 is disposed on the bottom of the ball holding portions 21C. The plate 21C1 is disposed perpendicular (including substantially perpendicular) to the optical axis Zs. The plate 21C1 functions as a rolling surface for the balls 31 on the movable portion side.

[0064] As shown in Fig. 5, the rear frame 11 is provided with ball abutment portions 11A at three positions on the front. These are the abutment portions for the ball 31 on the fixed portion side. The ball abutment portions 11A are formed on a plane perpendicular (including substantially perpendicular) to the optical axis Zs. The ball abutment portions 11A are disposed corresponding to the ball holding portions 21C of the movable frame 21. The ball abutment portions 11A function as rolling surfaces for the ball 31 on the fixed portion side.

[0065] The movable part 20 is movably held relative to the fixed part 10 by the ball 31 held in the ball holding part 21C of the movable frame 21 rolling between the plate 21C1 of the ball holding part 21C and the ball abutment part 11A of the rear frame 11.

[0066] In order to hold the movable frame 21 without dropping off from the rear frame 11, it is necessary to bias the movable frame 21 against the rear frame 11. In this embodiment, the movable frame 21 is biased by utilizing a magnet of a motor that drives the movable part 20. This will be described later. In addition to this, biasing means such as a spring can also be used to bias the movable frame 21.

[0067] [Limiting the range of movement of moving parts] The movable portion 20 has a restricted movable range.

[0068] 7, the movable frame 21 is provided with stopper pins 22 at two positions on the rear surface. The stopper pins 22 have a cylindrical shape and are provided so as to protrude from the rear surface of the movable frame 21 in the optical axis direction.

[0069] 5, the rear frame 11 is provided with movable range restriction holes 11B. The movable range restriction holes 11B are rectangular through-holes. The movable range restriction holes 11B are provided in two locations on the rear frame 11 corresponding to the two stopper pins 22.

[0070] As shown in FIG. 2, the movable part 20 is held by the fixed part 10 with the stopper pin 22 of the movable frame 21 inserted into the movable range restriction hole 11B of the rear frame 11. The movable range of the movable part 20 is restricted by the stopper pin 22. That is, the movable range is restricted to the range within which the stopper pin 22 can move. The range within which the stopper pin 22 can move is within the movable range restriction hole 11B. The stopper pin 22 is located at the center of the movable range restriction hole 11B when the image sensor 30 is located at the origin position. A ring-shaped rubber is attached to the outer periphery of the stopper pin 22 as a buffer member (damper).

[0071] [Prevents moving parts from falling off] The movable part 20 held by the fixed part 10 has the flange part 21B of the movable frame 21 disposed between the rear frame 11 and the front frame 12 with a predetermined gap therebetween. This restricts the movement of the movable part 20 toward the optical axis. This also prevents the movable part 20 from falling off. That is, for example, even if the movable frame 21 is lifted up from the rear frame 11 due to an impact or the like, the movable frame 21 comes into contact with the front frame 12 before the stopper pin 22 comes out of the movable range restriction hole 11B, so that falling off can be prevented.

[0072] [Drive unit] In this embodiment, the movable part 20 is driven by using a voice coil motor (VCM) as an actuator.

[0073] The imaging unit 1 has, as driving parts for the movable part 20, a Y-axis motor 40 that drives the movable part 20 in the y-axis direction, and two X-axis motors 50, 60 that drive the movable part 20 in the x-axis direction. One X-axis motor 50 is referred to as a first X-axis motor 50, and the other X-axis motor 60 is referred to as a second X-axis motor 60. The first X-axis motor 50 and the second X-axis motor 60 are arranged in parallel above and below the optical axis in a plane perpendicular to the optical axis.

[0074] (1) Y-axis motor The Y-axis motor 40 is composed of a VCM and has a pair of Y-axis magnets 41a, 41b, and a Y-axis coil 42. The Y-axis coil 42 is provided on the movable part side, and the pair of Y-axis magnets 41a, 41b are provided on the fixed part side (a so-called moving coil type VCM).

[0075] As shown in Fig. 7, the movable frame 21 is provided with a Y-axis coil holding portion 23Y on the flange portion 21B. The Y-axis coil holding portion 23Y is configured as an opening having a shape corresponding to the outer shape of the Y-axis coil 42. The Y-axis coil 42 is held on the inner periphery of the Y-axis coil holding portion 23Y. As an example, in this embodiment, the Y-axis coil 42 is housed in the inner periphery of the Y-axis coil holding portion 23Y and is held by being adhered with an adhesive. The Y-axis coil 42 is mounted on a flexible printed circuit (FPC) 70.

[0076] As shown in FIG. 5, a pair of Y-axis magnets 41a, 41b are provided on the rear frame 11. The pair of Y-axis magnets 41a, 41b are arranged in parallel in the vertical direction. The pair of Y-axis magnets 41a, 41b are fixed to the rear frame 11, for example, by bonding with an adhesive. As described above, the fixed part 10 is made of a magnetic material (iron as an example) and functions as a yoke. The pair of Y-axis magnets 41a, 41b form a magnetic circuit between the rear frame 11 and the front frame 12, which also function as a yoke. The Y-axis coil 42 is disposed in this magnetic circuit when the movable part 20 is assembled to the fixed part 10.

[0077] (2) 1st X-axis motor The first X-axis motor 50 is configured with a VCM like the Y-axis motor 40, and has a pair of first X-axis magnets 51a, 51b and a first X-axis coil 52. The first X-axis coil 52 is provided on the movable part side, and the pair of first X-axis magnets 51a, 51b is provided on the fixed part side.

[0078] As shown in FIG. 7, the movable frame 21 is provided with a first X-axis coil holding portion 23X1 on the flange portion 21B. The first X-axis coil holding portion 23X1 is configured as an opening having a shape corresponding to the outer shape of the first X-axis coil 52. The first X-axis coil 52 is held on the inner periphery of the first X-axis coil holding portion 23X1. As an example, in this embodiment, the first X-axis coil 52 is housed in the inner periphery of the first X-axis coil holding portion 23X1 and is held by being adhered with an adhesive. The first X-axis coil 52 is mounted on a flexible printed circuit board 70 shared with the Y-axis coil 42.

[0079] As shown in Fig. 5, a pair of first X-axis magnets 51a, 51b are provided on the rear frame 11. The pair of first X-axis magnets 51a, 51b are arranged in parallel at a certain interval in the left-right direction (horizontal direction). The pair of first X-axis magnets 51a, 51b are fixed to the rear frame 11, for example, by bonding with an adhesive. The pair of first X-axis magnets 51a, 51b form a magnetic circuit between the rear frame 11 and the front frame 12, which function as a yoke. The first X-axis coil 52 is arranged in this magnetic circuit when the movable part 20 is assembled to the fixed part 10.

[0080] (3) 2nd X-axis motor The second X-axis motor 60 is configured with a VCM like the Y-axis motor 40, and has a pair of second X-axis magnets 61a, 61b and a second X-axis coil 62. The second X-axis coil 62 is provided on the movable part side, and the pair of second X-axis magnets 61a, 61b are provided on the fixed part side.

[0081] As shown in FIG. 7, the movable frame 21 is provided with a second X-axis coil holding portion 23X2 on the flange portion 21B. The second X-axis coil holding portion 23X2 is configured as an opening having a shape corresponding to the outer shape of the second X-axis coil 62. The second X-axis coil 62 is held on the inner periphery of the second X-axis coil holding portion 23X2. As an example, in this embodiment, the second X-axis coil 62 is housed in the inner periphery of the second X-axis coil holding portion 23X2 and is held by being adhered with an adhesive. The second X-axis coil 62 is mounted on a flexible printed circuit board 70 shared with the Y-axis coil 42 and the first X-axis coil 52.

[0082] As shown in Fig. 6, the pair of second X-axis magnets 61a, 61b are provided on the rear frame 11. The pair of second X-axis magnets 61a, 61b are arranged in parallel at a certain interval in the left-right direction (horizontal direction). The pair of second X-axis magnets 61a, 61b are fixed to the rear frame 11, for example, by bonding with an adhesive. The pair of second X-axis magnets 61a, 61b form a magnetic circuit between the rear frame 11 and the front frame 12, which function as a yoke. The second X-axis coil 62 is arranged in this magnetic circuit when the movable part 20 is assembled to the fixed part 10.

[0083] The movable part 20 moves (shifts) in the Y-axis direction (up and down direction) in a plane perpendicular to the optical axis by driving the Y-axis motor 40. Also, the movable part 20 moves (shifts) in the X-axis direction (left and right direction) in a plane perpendicular to the optical axis by driving the first X-axis motor 50 and the second X-axis motor 60. Furthermore, the movable part 20 rotates (rolls) around the optical axis by driving the Y-axis motor 40, the first X-axis motor 50, and the second X-axis motor 60.

[0084] [Position detection section] The imaging unit 1 has three position detection units as means for detecting the position of the movable part 20. Specifically, the imaging unit 1 has a Y-axis position detection unit that detects the position of the Y-axis coil 42, a first X-axis position detection unit that detects the position of the first X-axis coil 52, and a second position detection unit that detects the position of the second X-axis coil 62.

[0085] (1) Y-axis position detector The Y-axis position detection unit detects the position in the Y-axis direction of the Y-axis coil 42. The Y-axis position detection unit is mainly composed of a Y-axis hall sensor 43, a Y-axis thermistor 44, and a pair of Y-axis position detection magnets 45a, 45b.

[0086] The Y-axis Hall sensor 43 and the Y-axis thermistor 44 are provided on the movable portion side. As shown in FIG.

[0087] 5, the pair of Y-axis position detection magnets 45a, 45b are provided on the rear frame 11. The pair of Y-axis position detection magnets 45a, 45b are arranged in parallel at a certain interval in the vertical direction. The pair of Y-axis position detection magnets 45a, 45b are fixed to the rear frame 11 by, for example, being bonded with an adhesive.

[0088] The Y-axis Hall sensor 43 detects the position of the Y-axis coil 42 in the Y-axis direction by detecting a change in magnetic flux density in the magnetic field generated by the Y-axis position detection magnets 45a and 45b.

[0089] The Y-axis thermistor 44 detects the temperature in the vicinity of the Y-axis Hall sensor 43. The temperature detected by the Y-axis thermistor 44 is used for temperature compensation of the Y-axis Hall sensor 43.

[0090] (2) First X-axis position detector The first X-axis position detection unit detects the position of the first X-axis coil 52 in the X-axis direction. The first X-axis position detection unit is mainly composed of the first X-axis Hall sensor 53, the first X-axis thermistor 54, and the first X-axis magnets 51a, 51b. As described above, the first X-axis magnets 51a, 51b are magnets that constitute the first X-axis motor 50. In other words, the first X-axis position detection unit shares a magnet with the first X-axis motor 50 to detect the position of the first X-axis coil 52 in the X-axis direction.

[0091] The first X-axis Hall sensor 53 and the first X-axis thermistor 54 are provided on the movable part side. As shown in FIG. 9, in this embodiment, the first X-axis Hall sensor 53 and the first X-axis thermistor 54 are mounted on a flexible printed circuit board 70 and disposed on the inner periphery of the first X-axis coil 52.

[0092] The first X-axis Hall sensor 53 detects the position of the first X-axis coil 52 in the first X-axis direction by detecting a change in magnetic flux density in the magnetic field generated by the first X-axis magnets 51a and 51b.

[0093] The first X-axis thermistor 54 detects the temperature in the vicinity of the first X-axis Hall sensor 53. The temperature detected by the first X-axis thermistor 54 is used for temperature compensation of the first X-axis Hall sensor 53.

[0094] (3) Second X-axis position detector The second X-axis position detection unit detects the position of the second X-axis coil 62 in the X-axis direction. The second X-axis position detection unit is mainly composed of the second X-axis Hall sensor 63, the second X-axis thermistor 64, and the second X-axis magnets 61a, 61b. As described above, the second X-axis magnets 61a, 61b are magnets that constitute the second X-axis motor 60. In other words, the second X-axis position detection unit shares a magnet with the second X-axis motor 60 to detect the position of the second X-axis coil 62 in the X-axis direction.

[0095] The second X-axis Hall sensor 63 and the second X-axis thermistor 64 are provided on the movable part side. As shown in FIG. 9, in this embodiment, the second X-axis Hall sensor 63 and the second X-axis thermistor 64 are mounted on a flexible printed circuit board 70 and disposed on the inner periphery of the second X-axis coil 62.

[0096] The second X-axis Hall sensor 63 detects the position of the second X-axis coil 62 in the second X-axis direction by detecting a change in magnetic flux density in the magnetic field generated by the second X-axis magnets 61a and 61b.

[0097] The second X-axis thermistor 64 detects the temperature in the vicinity of the second X-axis Hall sensor 63. The temperature detected by the second X-axis thermistor 64 is used for temperature compensation of the second X-axis Hall sensor 63.

[0098] [Movable frame biasing structure] As described above, the imaging unit 1 of the present embodiment urges the movable frame 21 toward the rear frame 11 by utilizing the magnets (Y-axis magnets 41a, 41b, first X-axis magnets 51a, 51b, and second X-axis magnets 61a, 61b) of the motors (Y-axis motor 40, first X-axis motor 50, and second X-axis motor 60) that drive the movable part 20.

[0099] 9, magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 are provided at a plurality of positions on the flange portion 21B of the movable frame 21. The magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 are made of a magnetic material (SUS430, for example) having a rectangular thin plate shape.

[0100] The magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 are disposed at the positions of the coils (Y-axis coil 42, first X-axis coil 52, and second X-axis coil 62) of the respective motors (Y-axis motor 40, first X-axis motor 50, and second X-axis motor 60). Specifically, the magnetic attraction plates 71Ya and 71Yb are disposed at the position of the Y-axis coil 42. The magnetic attraction plate 71X1 is disposed at the position of the first X-axis coil 52. The magnetic attraction plate 71X2 is disposed at the position of the second X-axis coil 62. As a result, the magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 are disposed in accordance with the positions of the magnets of the respective motors.

[0101] In this embodiment, magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 are provided on the flexible printed circuit board 70. Therefore, by attaching the flexible printed circuit board 70 to the movable frame 21, the magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 are simultaneously attached to the movable frame 21. The magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 are attached to the surface of the flexible printed circuit board 70 opposite to the surface on which the coil is mounted.

[0102] With the above configuration, the magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 arranged at the positions of the coils of each motor are magnetically attracted to the magnets of each motor, and the movable frame 21 is urged toward the rear frame 11. This prevents the movable frame 21 from falling off.

[0103] The biased movable frame 21 is pressed against the rear frame 11 via the balls 31. This allows the movable frame 21 to be held movably relative to the rear frame 11.

[0104] [Dust reduction unit (DR unit)] FIG. 11 is a cross-sectional view showing a schematic configuration of the DR unit.

[0105] The DR unit 80 seals the front surface of the image sensor 30 with a cover glass (dummy glass) 84 to prevent dust from directly adhering to the light receiving surface 30A of the image sensor 30. In addition, the DR unit 80 vibrates the cover glass 84 to remove dust adhering to the cover glass 84.

[0106] As shown in FIG. 11, a DR unit 80 of this embodiment includes an infrared cut filter 82, and the infrared cut filter 82 is sealed with a cover glass 84.

[0107] Fig. 12 is a front view of the DR unit. Fig. 13 is a rear view of the DR unit. Fig. 14 and Fig. 15 are exploded perspective views of the DR unit. Fig. 14 is an exploded perspective view of the DR unit 80 seen from the front side (object side), and Fig. 15 is an exploded perspective view of the DR unit 80 seen from the rear side (image side).

[0108] As shown in FIGS. 14 and 15, the DR unit 80 is mainly composed of a base frame 81, an infrared cut filter 82, a mask plate 83, a cover glass 84, a piezoelectric element 85, and the like.

[0109] The base frame 81 has a rectangular frame shape. As an example, in the present embodiment, the base frame 81 is made of a resin molded product. An inner peripheral portion (opening) of the base frame 81 functions as a holding portion for the infrared cut filter 82. In the present embodiment, the base frame 81 is an example of a second holding member.

[0110] A first cushion member 86 is attached to the back surface of the base frame 81. The first cushion member 86 has a rectangular frame shape. The first cushion member 86 is made of an elastic body such as rubber. The first cushion member 86 is attached to the base frame 81 so as to surround the outer periphery of the opening. A first cushion attachment portion 81B for attaching the first cushion member 86 is provided on the back surface of the base frame 81. The first cushion member 86 is attached in close contact with the first cushion attachment portion 81B. As an example, in this embodiment, the first cushion member 86 is attached in close contact with the first cushion attachment portion 81B by double-sided tape.

[0111] When the DR unit 80 is assembled to the movable frame 21, the first cushion member 86 is attached in close contact with the front surface of the image sensor 30. This seals the gap between the base frame 81 and the image sensor 30. The first cushion member 86 is attached so as to surround the periphery of the light receiving portion (light receiving surface) of the image sensor 30.

[0112] The infrared cut filter 82 has a rectangular thin plate shape. The infrared cut filter 82 is held on the inner periphery of the base frame 81. As an example, in the present embodiment, the infrared cut filter 82 is adhered to the inner periphery of the base frame 81 with an adhesive and held thereon. In the present embodiment, the infrared cut filter 82 is an example of a first optical element.

[0113] The mask plate 83 is a member that restricts the opening area of ​​the base frame 81. The mask plate 83 has a rectangular frame shape with a predetermined opening. The mask plate 83 is attached to the front surface of the base frame 81 to restrict the opening area of ​​the base frame 81. The front surface of the base frame 81 is provided with a mask attachment portion 81A for attaching the mask plate 83. The mask plate 83 is positioned and attached to the mask attachment portion 81A. As an example, in this embodiment, the mask plate 83 is attached to the mask attachment portion 81A by double-sided tape.

[0114] The cover glass 84 is made of a transparent glass plate having a rectangular thin plate shape. The cover glass 84 is attached to the front surface of the base frame 81 via a second cushion member 87. In the present embodiment, the cover glass 84 is an example of a second optical element.

[0115] The second cushion member 87 has a rectangular frame shape. The second cushion member 87 is made of an elastic body such as rubber. The second cushion member 87 is attached to the base frame 81 so as to surround the outer periphery of the mask plate 83. Thus, the second cushion member 87 is attached to the base frame 81 so as to surround the opening of the base frame 81. The front surface of the base frame 81 is provided with a second cushion attachment portion 81C for attaching the second cushion member 87. The second cushion attachment portion 81C is provided on the outer periphery of the mask attachment portion 81A. The second cushion member 87 is attached in close contact with the second cushion attachment portion 81C. As an example, in this embodiment, the second cushion member 87 is attached in close contact with the second cushion attachment portion 81C by double-sided tape.

[0116] The cover glass 84 is attached with its back surface in close contact with the second cushion member 87 attached to the base frame 81. As an example, in this embodiment, the cover glass 84 is attached in close contact with the second cushion member 87 by double-sided tape.

[0117] A glass position restricting portion 81D that restricts the mounting position of the cover glass 84 is provided on the front surface of the base frame 81. As shown in Fig. 12, the glass position restricting portion 81D is composed of an L-shaped first position restricting portion 81D1 that restricts the position of the upper right corner of the cover glass 84, an L-shaped second position restricting portion 81D2 that restricts the position of the lower right corner of the cover glass 84, an L-shaped third position restricting portion 81D3 that restricts the position of the upper left corner of the cover glass 84, and a fourth position restricting portion 81D4 that restricts the position of the lower left corner of the cover glass 84. The cover glass 84 is fitted into an area defined by the four position restricting portions (the first position restricting portion 81D1, the second position restricting portion 81D2, the third position restricting portion 81D3, and the fourth position restricting portion 81D4) that constitute the glass position restricting portion 81D, and is attached to the base frame 81. As a result, the cover glass 84 is attached to the base frame 81 in a state in which movement within a plane perpendicular to the optical axis is restricted.

[0118] The cover glass 84 is attached to the base frame 81 via the second cushion member 87, so that the front surface of the infrared cut filter 82 is sealed (hermetically sealed) by the cover glass 84 and the second cushion member 87. The cover glass 84 is attached in parallel to the infrared cut filter 82.

[0119] A pair of third cushion members 88 are attached to the left and right sides of the front surface of the cover glass 84. The third cushion members 88 are made of an elastic body such as rubber, and are arranged along the left and right sides of the cover glass 84. The third cushion members 88 are attached in close contact with the front surface of the cover glass 84. As an example, in this embodiment, the third cushion members 88 are attached in close contact with the front surface of the cover glass 84 by double-sided tape. As will be described later, the third cushion members 88 function as a buffer material between the cover glass 84 and the cover member 90.

[0120] The piezoelectric element 85 is attached to the lower part of the back surface of the cover glass 84. The piezoelectric element 85 is disposed along the lower side of the cover glass 84. The piezoelectric element 85 functions as a vibration means, and vibrates the cover glass 84 at a predetermined vibration frequency. By vibrating the cover glass 84 with the piezoelectric element 85, dust on the surface of the cover glass 84 is shaken off and the dust is removed from the cover glass 84.

[0121] [DR unit retention structure] FIG. 16 is an exploded perspective view showing the holding structure of the DR unit.

[0122] 16, after the DR unit 80 is attached to the movable frame 21, a cover member 90 is attached to the front surface of the DR unit 80. The cover member 90 sandwiches and holds the DR unit 80 between the movable frame 21 and the cover member 90.

[0123] The DR unit 80 is attached to the front part of the image sensor holding part 21A. As shown in FIG. 10, the image sensor holding part 21A has a DR unit mounting reference surface 21D on the front part. The DR unit mounting reference surface 21D is configured as a plane perpendicular (including substantially perpendicular) to the optical axis. On the other hand, the DR unit 80 has an abutment surface 81H on the back surface of the base frame 81 as shown in FIG. 15. The DR unit 80 is attached to the front part of the image sensor holding part 21A by abutting the abutment surface 81H of the base frame 81 against the DR unit mounting reference surface 21D. The abutment surface 81H of the base frame 81 against the DR unit mounting reference surface 21D is positioned in the optical axis direction. As a result, the infrared cut filter 82 and the cover glass 84 are arranged perpendicular (including substantially perpendicular) to the optical axis. Also, as a result, the first cushion member 86 is attached in close contact with the front surface of the image sensor 30. As a result, the light receiving portion (light receiving surface) of the image sensor 30 is sealed by the first cushion member 86 and the infrared cut filter .

[0124] FIG. 17 is a front view of the movable frame to which the DR unit is attached.

[0125] As shown in FIG. 17, a first positioning pin 111 and a second positioning pin 112 are provided on the front portion of the image sensor holding portion 21A. The first positioning pin 111 and the second positioning pin 112 both have a cylindrical shape and are arranged to protrude forward along the optical axis. The first positioning pin 111 is provided on the bottom side of the image sensor holding portion 21A. In this embodiment, it is provided near the center of the bottom side. The second positioning pin 112 is provided on the top side of the image sensor holding portion 21A. In this embodiment, it is provided near one end of the top side (near the right end in FIG. 17).

[0126] On the other hand, the base frame 81 of the DR unit 80 is provided with a pin hole 81E that engages with the first positioning pin 111 and a notch (cutout) 81F that engages with the second positioning pin 112. The pin hole 81E is provided in a lower side portion of the base frame 81 corresponding to the first positioning pin 111, more specifically, near the center of the lower side portion. The notch 81F is provided in an upper side portion of the base frame 81 corresponding to the second positioning pin 112, more specifically, near one end of the upper side portion. The pin hole 81E is formed as a through hole into which the first positioning pin 111 fits. The notch 81F is formed as a recess into which the second positioning pin 112 fits.

[0127] The DR unit 80 is attached to the front portion of the image sensor holding part 21A by engaging a pin hole 81E and a notch 81F provided in the base frame 81 with a first positioning pin 111 and a second positioning pin 112, respectively. This positions the DR unit 80 at a predetermined position in a plane perpendicular to the optical axis, and the DR unit 80 is attached to the movable frame 21. This also suppresses positional deviation in the plane perpendicular to the optical axis.

[0128] In this embodiment, the first positioning pin 111 is an example of a fifth convex portion. The second positioning pin 112 is an example of a third convex portion. The pin hole 81E is an example of a first fifth opening. The notch 81F is an example of a third opening.

[0129] Figure 18 is a front view of the cover member, and Figure 19 is a perspective view of the cover member.

[0130] 18 and 19, the cover member 90 is mainly composed of a cover member main body 91, a screw fastening portion 92 extending downward from the cover member main body 91, a seat portion 93 extending upward from the cover member main body 91, and a pair of hook portions 94A, 94B provided on the seat portion 93. In the present embodiment, the cover member 90 is an example of a third holding member.

[0131] The cover member main body 91 is a portion that covers the cover glass 84. Therefore, it has a shape corresponding to the shape of the cover glass 84. Specifically, it has a front cover part 91A that covers the front portion of the cover glass 84, and four outer periphery cover parts 91T, 91B, 91L, and 91R that cover the outer periphery of the cover glass 84, and has an overall rectangular frame shape with four corners cut out. The front cover part 91A has a rectangular frame shape with a rectangular opening.

[0132] The screw fastening portion 92 is formed of a trapezoidal plate-like piece extending downward from the outer peripheral cover portion 91B on the lower side of the cover member main body 91. The screw fastening portion 92 is provided near the center of the lower side of the cover member main body 91. The screw fastening portion 92 is arranged parallel (including substantially parallel) to the front cover portion 91A of the cover member main body 91. The screw fastening portion 92 is provided with a screw fastening hole 92A used when screwing the cover member 90, and a first pin hole 92B for positioning the cover member 90. The screw fastening hole 92A is formed of a through hole through which the screw 116 is inserted. In this embodiment, the screw fastening hole 92A is an example of a third hole. The first pin hole 92B is formed of a through hole into which the first positioning pin 111 fits.

[0133] The seat portion 93 is configured as a rectangular plate-like piece extending upward from the upper outer peripheral cover portion 91B of the cover member main body 91. The seat portion 93 is provided with approximately the same width as the cover member main body 91. The seat portion 93 is disposed parallel (including approximately parallel) to the front cover portion 91A of the cover member main body 91. The seat portion 93 is provided with a second pin hole 93A for positioning the cover member 90. The second pin hole 93A is configured as an elongated hole extending in the vertical direction.

[0134] A pair of hook portions 94A, 94B are provided near both ends of the seat portion 93. The hook portions 94A, 94B are formed of rectangular plate-like pieces having rectangular openings 94A1, 94B1. The hook portions 94A, 94B are arranged perpendicular (including substantially perpendicular) to the seat portion 93. Thus, the hook portions 94A, 94B are arranged perpendicular (including substantially perpendicular) to the front cover portion 91A of the cover member main body 91. The hook portions 94A, 94B have inclined bent portions 94A2, 94B2 at their tips. The bent portions 94A2, 94B2 function as guide portions when the hook portions 94A, 94B are engaged with the claw portions 114A, 114B. In this embodiment, the hook portion 94A is an example of a first opening in a broad sense, and the opening 94A1 of the hook portion 94A is an example of a first opening in a narrow sense. Moreover, the hook portion 94B is an example of a second opening in the broad sense, and the opening 94B1 of the hook portion 94B is an example of a second opening in the narrow sense.

[0135] The cover member 90 is a so-called sheet metal member, and is processed into a predetermined shape by bending a metal plate, etc. Since the cover member 90 is a sheet metal member, it is capable of elastic deformation (has spring properties).

[0136] The cover member 90 is attached to the movable frame 21 using a pair of hook portions 94A, 94B and a screw fastening portion 92. More specifically, the cover member 90 is attached to the image sensor holding portion 21A of the movable frame 21.

[0137] As shown in Fig. 17, the image sensor holding portion 21A of the movable frame 21 is provided with a pedestal portion 21E on its front surface. The pedestal portion 21E is provided at approximately the center of the upper side of the image sensor holding portion 21A. The pedestal portion 21E has a cover mounting reference surface 21F. The cover mounting reference surface 21F is configured as a plane perpendicular (including approximately perpendicular) to the optical axis. The cover member 90 is attached to the front surface of the image sensor holding portion 21A by abutting the seat portion 93 against the cover mounting reference surface 21F of the pedestal portion 21E.

[0138] The base portion 21E is further provided with a third positioning pin 113 for positioning the cover member 90 at a predetermined position within a plane perpendicular to the optical axis. The third positioning pin 113 has a cylindrical shape and is disposed so as to protrude forward along the optical axis. The third positioning pin 113 is disposed at approximately the center of the base portion 21E.

[0139] The cover member 90 is attached to the image sensor holding portion 21A of the movable frame 21 by fitting the first positioning pin 111 into the first pin hole 92B provided in the screw fastening portion 92 and fitting the third positioning pin 113 into the second pin hole 93A provided in the seat portion 93. In this way, the cover member 90 is positioned and attached to the movable frame 21 at a predetermined position.

[0140] In the present embodiment, the third positioning pin 113 is an example of a fourth protrusion, the second pin hole 93A is an example of a fourth opening, and the first pin hole 92B is an example of a second fifth opening.

[0141] As shown in FIG. 10, the image sensor holding portion 21A of the movable frame 21 is provided with a pair of claws 114A, 114B corresponding to the pair of hooks 94A, 94B of the cover member 90. The claws 114A, 114B are engagement portions of the hooks 94A, 94B. The claws 114A, 114B are provided on the outer periphery of the image sensor holding portion 21A. In this embodiment, the pair of claws 114A, 114B are provided at a predetermined interval on the outer periphery surface of the upper side portion of the image sensor holding portion 21A. The pair of claws 114A, 114B have a shape corresponding to the shape of the openings 94A1, 94B1 of the hooks 94A, 94B. In this embodiment, the pair of claws 114A, 114B have a rectangular outer periphery corresponding to the shape of the openings 94A1, 94B1 of the hooks 94A, 94B. The claws 114A and 114B have a tapered shape in which the amount of protrusion decreases from the image side (rear side) to the object side (front side). Tapered surfaces (inclined surfaces) 114A1 and 114B1 of the claws 114A and 114B function as guide surfaces when engaging the hooks 94A and 94B. In this embodiment, the claw 114A is an example of a first convex portion, and the claw 114B is an example of a second convex portion.

[0142] The cover member 90 is attached to the image sensor holding portion 21A on which the DR unit 80 is attached by placing the cover member main body 91 over the cover glass 84. When the cover member main body 91 is placed over the cover glass 84, the hook portions 94A, 94B climb over the claw portions 114A, 114B and engage with the claw portions 114A, 114B. More specifically, the hook portions 94A, 94B slide on the tapered surfaces 114A1, 114B1 of the claw portions 114A, 114B, climb over the claw portions 114A, 114B, and engage with the claw portions 114A, 114B. As a result, the cover member 90 is provisionally fixed to the movable frame 21.

[0143] As shown in FIG. 10, the image sensor holding portion 21A of the movable frame 21 is provided with a screw hole 115 corresponding to the screw hole 92A provided in the screw portion 92 of the cover member 90. The screw hole 115 is provided to open on an end face (a face intersecting with the optical axis) of the lower side portion of the image sensor holding portion 21A. In particular, in this embodiment, the screw hole 115 is disposed at a substantially central position in the left and right width direction of the image sensor holding portion 21A. Therefore, in this embodiment, the first positioning pin 111 and the screw hole 115 are disposed adjacent to each other. The screw hole 115 is provided along the optical axis. In this embodiment, the screw hole 115 is an example of a first hole.

[0144] The cover member 90 is fixed to the image sensor holding portion 21A together with the base frame 81 of the DR unit 80 by screwing with the screw 116. That is, the cover member 90 and the base frame 81 are fixed to the image sensor holding portion 21A by so-called co-tightening. The base frame 81 is provided with a co-tightening portion 81G having a plain screw hole 81G1. When the DR unit 80 is attached to the image sensor holding portion 21A, the screw hole 81G1 is arranged coaxially (including approximately coaxially) with the screw hole 115 of the image sensor holding portion 21A. Furthermore, when the cover member 90 is attached (temporarily fixed) to the movable frame 21, the screw hole 92A is arranged coaxially with the screw hole 81G1 and the screw hole 115. Thus, when the screw 116 is fitted into the screw hole 115 and tightened, the cover member 90 and the base frame 81 are co-tightened with the screw 116 and fixed to the image sensor holding portion 21A. In this embodiment, the screw hole 81G1 is an example of a second hole.

[0145] In this embodiment, the fixing screw 116 is configured as a tapping screw, and the screw 116 is fastened into the screw hole 115 by self-tapping. A tapping screw is a type of screw that can be fastened while cutting a thread. Therefore, the screw hole 115 before fastening is configured as a hole without a thread (a hole with a diameter slightly smaller than that of the screw 116). By using a tapping screw, a high holding force can be obtained and a structure that is difficult to loosen can be created.

[0146] By fastening the screw 116, the DR unit 80 is pressed toward the movable frame 21 via the cover member 90. As a result, the first cushion member 86 provided on the back surface of the base frame 81 is pressed against the front surface of the image sensor 30 and comes into close contact with the front surface of the image sensor 30. This more reliably seals the light receiving surface of the image sensor 30. In addition, by being pressed by the cover member 90, the second cushion member 87 provided on the back surface of the cover glass 84 is pressed against the front surface of the base frame 81 and comes into close contact with the base frame 81. This more reliably seals the infrared cut filter 82. The cover member 90 comes into contact with the cover glass 84 via the third cushion member 88 provided on the front surface of the cover glass 84 and presses the cover glass 84. This makes it possible to suppress cracks, chips, and the like that occur when the metal cover member 90 comes into direct contact with the cover glass 84.

[0147] [Installation of DR unit] In the imaging unit 1 of the present embodiment configured as above, the DR unit 80 is assembled to the movable frame 21 as follows.

[0148] First, the DR unit 80 is attached to the movable frame 21. The DR unit 80 is attached as follows.

[0149] The pin hole 81E and the notch 81F provided in the base frame 81 are engaged with the first positioning pin 111 and the second positioning pin 112 provided in the movable frame 21, and the DR unit 80 is attached to the movable frame 21. As a result, the DR unit 80 is attached to the movable frame 21, positioned at a predetermined position in a plane perpendicular to the optical axis.

[0150] Furthermore, the abutment surface 81H provided on the back surface of the base frame 81 is abutted against the DR unit mounting reference surface 21D provided on the image sensor holding portion 21A, and the DR unit 80 is attached to the movable frame 21. As a result, the DR unit 80 is positioned at a predetermined position in the optical axis direction and attached to the movable frame 21.

[0151] When the DR unit 80 is attached to the movable frame 21, the screw hole 81G1 provided in the base frame 81 of the DR unit 80 is arranged coaxially (including approximately coaxially) with the screw hole 115 provided in the movable frame 21.

[0152] Next, the cover member 90 is attached to temporarily fix the DR unit 80 to the movable frame 21. The cover member 90 is attached as follows.

[0153] The cover member 90 is attached by engaging a first pin hole 92B and a second pin hole 93A provided in the cover member 90 with a first positioning pin 111 and a third positioning pin 113 provided in the movable frame 21. This positions the cover member 90 at a predetermined position in a plane perpendicular to the optical axis, and the cover member 90 is attached to the DR unit 80. The cover member 90 is attached so that the cover member main body 91 covers the cover glass 84.

[0154] By mounting the cover member 90, a pair of hook portions 94A, 94B provided on the cover member 90 engage with a pair of claw portions 114A, 114B provided on the movable frame 21. The hook portions 94A, 94B, while elastically deforming in the process of mounting the cover member 90, climb over the tapered claw portions 114A, 114B and engage with the claw portions 114A, 114B. That is, the claw portions 114A, 114B fit into the openings 94A1, 94B1. The claw portions 114A, 114B fit into the openings 94A1, 94B1 of the hook portions 94A, 94B, thereby restricting the movement of the cover member 90 in the optical axis direction. This prevents the cover member 90 from falling off. That is, the cover member 90 is temporarily fixed to the movable frame 21.

[0155] The cover member 90 is attached to the cover glass 84 via a third cushion member 88 provided on the front surface of the cover glass 84. This prevents the metallic cover member 90 from coming into direct contact with the cover glass 84.

[0156] When the cover member 90 is attached, the screw hole 92A provided in the cover member 90 is arranged coaxially (including approximately coaxially) with the screw hole 81G1 provided in the base frame 81 of the DR unit 80. At the same time, it is arranged coaxially (including approximately coaxially) with the screw hole 115 provided in the movable frame 21.

[0157] With respect to the temporarily fixed cover member 90, screws 116 are passed through the screw holes 92A and 81G1, and fastened to the screw holes 115. As a result, the cover member 90 and the base frame 81 are both fixed to the movable frame 21 by the screws 116. That is, the cover member 90 and the base frame 81 are fastened to the movable frame 21 by being fastened together. The screws 116 are formed as tapping screws, and are fastened to the screw holes 115 by self-tapping.

[0158] By fastening the cover member 90 and the base frame 81 together with the screws 116 and fixing them to the movable frame 21, the DR unit 80 is pressed toward the movable frame 21 via the cover member 90. As a result, the first cushion member 86 provided on the rear surface of the base frame 81 is pressed against the front surface of the image sensor 30 and comes into close contact with the front surface of the image sensor 30. This makes it possible to more reliably seal the light receiving surface of the image sensor 30. In addition, by being pressed by the cover member 90, the second cushion member 87 provided on the rear surface of the cover glass 84 is pressed against the front surface of the base frame 81 and comes into close contact with the base frame 81. This makes it possible to more reliably seal the infrared cut filter 82.

[0159] [Assembling the imaging unit] The imaging unit 1 is assembled as follows.

[0160] 3, after the movable part 20 is attached to the rear frame 11, the front frame 12 is fixed to the rear frame 11 with the screws 14. In this way, the movable part 20 is held by the fixed part 10.

[0161] When the movable part 20 is attached to the rear frame 11, the ball 31 is accommodated in the ball holding part 21C, and the movable part 20 is attached to the rear frame 11. As a result, the ball 31 is disposed between the movable part 20 and the rear frame 11, and the movable part 20 is held movably via the ball 31.

[0162] Furthermore, when the movable portion 20 is mounted on the rear frame 11, it is mounted so that the stopper pin 22 enters the movable range restriction hole 11B.

[0163] When the movable part 20 is attached to the rear frame 11, the magnetic attraction plates 71Ya, 71Yb, 71X1, and 71X2 provided on the movable part 20 are magnetically attracted by the magnets (Y-axis magnets 41a, 41b, first X-axis magnets 51a, 51b, and second X-axis magnets 61a, 61b) of the motors (Y-axis motor 40, first X-axis motor 50, and second X-axis motor 60) provided on the rear frame 11. This causes the movable part 20 to be biased toward the rear frame 11. This causes the movable frame 21 to be held on the rear frame 11.

[0164] [Effects of the imaging unit] As described above, in the imaging unit 1 of this embodiment, the DR unit 80 is fixed using the sheet metal cover member 90. The cover member 90 is structured to be attached to the movable frame 21 using the hook portions 94A, 94B and the screw holes 92A. This makes it possible to reduce the size of the movable portion 20, particularly in the vertical direction (y-axis direction) in a plane perpendicular to the optical axis.

[0165] That is, since the DR unit 80 has an element to be vibrated (the cover glass 84 in this embodiment), it needs to be firmly attached to the base (the movable frame 21 in this embodiment). One possible method for firmly fixing the DR unit is to screw the cover member at multiple points. However, a screw-fastening configuration requires the strength of the screw fastening points to be ensured, which poses a problem that the mounting portion of the DR unit 80 becomes large (in order to increase the strength, it is necessary to ensure the thickness of the screw hole portion, which makes the mounting portion larger as a whole. In particular, when using tapping screws, it is necessary to ensure that the thickness of the screw hole portion is large so that it can withstand the tightening torque).

[0166] The imaging unit 1 of the present embodiment has a configuration in which the cover member 90 is fixed to the movable frame 21 by a combination of hook fastening (a fastening method using hooks and claws) and screw fastening, and therefore can be made smaller than a configuration in which everything is fixed by screws. That is, in the case of hook fastening, the space required for installation is only the protruding portion of the claws, and there is no need to ensure a large thickness at the installation location as in the case of screw fastening. Therefore, compared to the case of screw fastening, the space required for installation can be made smaller. As a result, the mounting portion of the DR unit 80 can be made smaller in size on a plane perpendicular to the optical axis. That is, the required thickness (thickness in a cross section perpendicular to the optical axis) can be made thinner at the hook fastening portion (the portion where the claws 114A and 114B are arranged) than at the screw fastening portion (the portion where the screw hole 115 is arranged), so that the projected area on the plane perpendicular to the optical axis can be made smaller. As a result, the mounting portion of the DR unit 80 can be made smaller in size on a plane perpendicular to the optical axis. Since the mounting portion of the DR unit 80 is provided on the image sensor holding portion 21A of the movable frame 21, the image sensor holding portion 21A can be made smaller (the projected area of ​​the image sensor holding portion 21A on a plane perpendicular to the optical axis can be reduced). Furthermore, the image sensor holding portion 21A can be made smaller, and thus the movable frame 21 can be made smaller. For example, in the imaging unit 1 of this embodiment, the Y-axis coil holding portion 23Y is disposed adjacent to the hook fastening portion. By using hook fastening instead of screw fastening, it is possible to move the position of the Y-axis coil holding portion 23Y closer to the image sensor holding portion 21A side. This allows the amount of overhang of the flange portion 21B (the amount of overhang upward in a plane perpendicular to the optical axis) to be reduced, and the movable frame 21 can be made smaller.

[0167] In addition, by combining screw fastenings rather than using hook fastenings entirely, rattling can be prevented and stable fixation can be achieved.

[0168] In consideration of miniaturization, it is preferable to have only one screw fastening location, as in the imaging unit 1 of this embodiment. This allows for stable fixation while also achieving overall miniaturization.

[0169] In addition, the imaging unit 1 of this embodiment is configured to fix the cover member 90 and the base frame 81 to the movable frame 21 by tightening them together with the screw 116. This allows for stable fixation while miniaturizing the entire unit. That is, in order to fix the cover member 90 and the base frame 81 without rattling, they must be screwed at least at one point. It is also possible to screw the cover member 90 and the base frame 81 individually. However, in a configuration in which the cover member 90 and the base frame 81 are screwed individually, multiple screwing points are required, and the movable part 20 becomes larger accordingly. By tightening the cover member 90 and the base frame 81 together, it is possible to achieve stable fixation while miniaturizing the unit as much as possible.

[0170] In addition, in the imaging unit 1 of this embodiment, the DR unit 80 is positioned using the first positioning pin 111 and the second positioning pin 112, and the cover member 90 is positioned using the first positioning pin 111 and the third positioning pin 113. That is, the DR unit 80 and the cover member 90 are positioned using only the first positioning pin 111. The second positioning pin 112 and the third positioning pin 113 function as positioning members for the DR unit 80 and the cover member 90, and also function as rotation restriction members for the DR unit 80 and the cover member 90. By using the second positioning pin 112 only to restrict the rotation of the DR unit 80 and the third positioning pin 113 only to restrict the rotation of the cover member 90, the height required for each pin can be reduced (the ratio of height to width can be reduced). As a result, for example, even when the movable frame 21 is made of a resin molded product, the strength of the second positioning pin 112 and the third positioning pin 113 can be ensured. This also makes it possible to prevent the second positioning pin 112 and the third positioning pin 113 from breaking even when subjected to an impact, for example. Furthermore, by reducing the height of the pins, it becomes possible to process them with high precision when processing them by resin molding.

[0171] The first positioning pin 111 is shared by the DR unit 80 and the cover member 90, but since the first positioning pin 111 is disposed near the fastening point by the screw 116, the force applied in the rotation direction can be substantially ignored. This makes it possible to prevent the first positioning pin 111 from breaking or the like even when the first positioning pin 111 is shared by the DR unit 80 and the cover member 90. In other words, even when the first positioning pin 111 is configured with a pin that is taller than the second positioning pin 112 and the third positioning pin 113 (a pin with a different height-to-width ratio and a taller pin when the width is the same), it is possible to prevent the first positioning pin 111 from breaking or the like.

[0172] [Variations] [Adhesive fixation of cover member and / or base frame] The cover member 90 and / or the base frame 81 may be further fixed by adhesive, which enables more secure restriction of rotation.

[0173] As an example, the base frame 81 is adhered and fixed to the movable frame 21. This can more firmly restrict the rotation of the DR unit 80. Also, the cover member 90 is adhered and fixed to the base frame 81 and / or the movable frame 21. This can more firmly restrict the rotation of the cover member 90.

[0174] The bonding is preferably performed at a position as far away as possible from the fastening point by the screw 116. The fastening point by the screw 116 is approximately the rotation center of the cover member 90 and the base frame 81. Therefore, by bonding at a position as far away as possible from the fastening point by the screw 116, it is possible to obtain an advantage in terms of impact resistance, for example, when an impact is received.

[0175] When adhering the base frame 81, for example, the abutment surface 81H of the base frame 81 is adhered to the DR unit mounting reference surface 21D of the movable frame 21. In this case, the abutment surface 81H of the base frame 81 is an example of an adhesive portion of the base frame 81. This adhesive portion is provided in an area facing the fastening point (position of the screw hole 115) by the screw 116 across the light receiving surface 30A of the image sensor 30. Also, in this area, it is provided at both ends in the longitudinal direction (including the vicinity of the ends). Adhesion is performed using, for example, an adhesive. Alternatively, adhesion may be performed using double-sided tape.

[0176] When the cover member 90 is adhered to the base frame 81, for example, it is adhered at the positions of the first position restricting portion 81D1 and the third position restricting portion 81D3 as shown by the dashed circle BP in Fig. 8. That is, the upper right corner and the upper left corner of the cover member main body 91 are adhered. In this case, the upper right corner and the upper left corner of the cover member main body 91 are an example of an adhesion portion of the cover member 90. This adhesion portion is provided in an area facing the fastening portion (position of the screw hole 115) by the screw 116 across the light receiving surface 30A of the image sensor 30. Also, in this area, it is provided at both ends in the longitudinal direction (including the vicinity of the ends).

[0177] When the cover member 90 is adhered to the movable frame 21, for example, the seat portion 93 is adhered to the base portion 21E of the movable frame 21 (the back surface of the seat portion 93 is adhered to the cover attachment reference surface 21F of the base portion 21E). The adhesion is performed using, for example, an adhesive. Alternatively, the adhesion may be performed using double-sided tape.

[0178] [Screw and hook fastening layout] In the above embodiment, the screw fastening points and the hook fastening points are arranged above and below the light receiving surface 30A of the image sensor 30 in a plane perpendicular to the optical axis, but the layout of the screw fastening points and the hook fastening points is not limited to this. The screw fastening points and the hook fastening points may be arranged above and below the light receiving surface 30A of the image sensor 30.

[0179] Also, for example, hook fastening points may be provided on both the left and right sides of the light receiving surface 30A of the image sensor 30 in a plane perpendicular to the optical axis, and screw fastening points may be provided at the top or bottom.

[0180] In addition, as in this embodiment, by arranging the screw fastening points and the hook fastening points on either side of the light receiving surface 30A of the image sensor 30 in a plane perpendicular to the optical axis, the hook fastening points can be positioned away from the center of rotation, thereby achieving more stable fixation.

[0181] Also, it is preferable that the hook fastening points are configured in pairs and are arranged symmetrically with respect to the fastening point by the screw 116. It is also preferable that they are arranged on the same plane. That is, it is preferable that the claws 114A and 114B are arranged symmetrically (including almost symmetrically) with respect to the fastening point by the screw 116 (the position of the screw hole 115) and arranged on the same plane (including a range that is recognized as being on the same plane). This makes it possible to suppress rattling in the rotation direction of the cover member 90 caused by the torque when the screw 116 is fastened and uneven deformation of the claws 114A and 114B. It is also possible to suppress at least one of the claws 114A and 114B from plastically deforming and losing its fixing force.

[0182] [Hawk layout considering processing by resin molding] When the movable frame 21 having the claws 114A and 114B on the outer periphery of the image sensor holding portion 21A is molded from resin using a metal mold, it is preferable to design the back side (image side) of the claws 114A and 114B to be an open space. In other words, it is preferable to have a structure in which there is nothing on the back side of the claws 114A and 114B.

[0183] When the movable frame 21 is resin-molded using a mold, it is necessary for the mold to have access from the rear side or side in the optical axis direction.

[0184] In the case of access from the side, the mold structure must be a sliding type, which results in a complex shape and increases the difficulty of molding. The claw portions 114A and 114B, which have a so-called burr shape, must be made with high precision to position the cover member 90. Therefore, a structure that is difficult to mold is not preferable.

[0185] By making the rear side of the claws 114A, 115B an open space and accessing the mold from the rear side, the claws 114A, 114B can be easily machined with high precision.

[0186] Fig. 20 is a rear view of the movable frame, and shows an example of the structure of the movable frame for making the rear side of the claw portion an open space.

[0187] 20, a part of the flange portion 21B is cut out behind the claw portions 114A and 114B to provide a cutout portion 21G, and the back side of the claw portions 114A and 114B is an open space. In this example, a part of the inner circumference of the Y-axis coil holding portion 23Y is cut out to provide the cutout portion 21G, and the back side of the claw portions 114A and 114B is an open space. Although the strength of the Y-axis coil holding portion 23Y is reduced by providing the cutout portion 21G, sufficient strength is ensured because the cutout portion 21G is filled with an adhesive for fixing the Y-axis coil 42 to the Y-axis coil holding portion 23Y.

[0188] By effectively utilizing the coil holding portion, the back side of the claw portions 114A and 115B can be an open space without providing a separate cutout portion. For example, in the example shown in FIG. 20, the claw portions 114A and 115B are disposed close to the center of the Y-axis coil holding portion 23Y. That is, the claw portions 114A and 115B are disposed completely inside the Y-axis coil holding portion 23Y. This allows the back side of the claw portions 114A and 115B to be an open space without providing a cutout portion.

[0189] In this way, it is preferable to arrange the claws 114A and 114B so as to effectively utilize the coil holding portion. Therefore, it is preferable to arrange the claws 114A and 114B adjacent to the coil holding portion. It is also preferable to arrange them so that at least a part of them overlaps with the coil holding portion when viewed from the front.

[0190] [Other variations] In the above embodiment, the present invention has been described as being applied to an imaging unit used in a digital camera with interchangeable lenses, but the application of the present invention is not limited to this. The present invention can also be applied to imaging units used in other imaging devices such as video cameras, television cameras, and cine cameras. In particular, the present invention can be applied to imaging devices that allow lens replacement.

[0191] In the above embodiment, the present invention is applied to an imaging unit having a camera shake correction function and a dust reduction function, but the application of the present invention is not limited to this. For example, the present invention can be applied to an imaging unit that does not have a camera shake correction function and a dust reduction function. The present invention can also be applied to an imaging unit that has only a dust reduction function. Furthermore, the present invention can also be applied to an imaging unit that has only a camera shake correction function.

[0192] In the present embodiment, the present invention is applied to an imaging unit equipped with a cover glass and an infrared cut filter as optical elements, but the application of the present invention is not limited thereto. The present invention can also be applied to an imaging unit further equipped with optical elements other than a cover glass and an infrared cut filter. The present invention can also be applied to an imaging unit using optical elements other than a cover glass and an infrared cut filter. For example, depending on the shooting purpose, an ND filter (Neutral Density Filter) may be provided to reduce the amount of light. A polarized light filter may be provided to adjust reflected light. Furthermore, a low-pass filter may be provided to remove high-frequency components. Therefore, the present invention can also be applied to an imaging unit equipped with an ND filter, a polarized filter, a low-pass filter, etc. instead of or in addition to a cover glass and / or an infrared cut filter. [Explanation of symbols]

[0193] 1...Imaging unit 10…Fixed part 11…Rear frame 11A…Ball contact part 11B…Movement range restriction hole 12…Front frame 12A…Mounting part 12A1…hole 13...Strut 14…Screw 20...Movable part 21...Movable frame 21A…Image sensor holder 21B…Flange section 21C…Ball holding section 21C1…Plate 21D…DR unit mounting reference surface 21E…Pedestal 21F…Cover mounting reference surface 22…Stopper pin 23X1…1st X-axis coil holding part 23X2…Second X-axis coil holding section 23Y…Y-axis coil holder 30...Image sensor 30A…Light receiving surface 31...Ball 40…Y-axis motor 41a...Axial magnet 41b...Axis magnet 42…Y-axis coil 43…Y-axis Hall sensor 44…Y-axis thermistor 45a…Magnet for detecting shaft position 45b...Magnet for detecting shaft position 50…1st X-axis motor 51a...Axial magnet 51b...Axis magnet 52…1st X-axis coil 53…1st X-axis Hall sensor 54…1st X-axis thermistor 60…Second X-axis motor 61a...Axial magnet 61b...Axial magnet 62…Second X-axis coil 63...2nd X-axis Hall sensor 64…2nd X-axis thermistor 70...Flexible printed circuit board 71X1…Magnetic adhesion plate 71X2…Magnetic adhesion plate 71Ya…Magnetic adhesion board 71Yb…Magnetic adhesion plate 80…DR unit 81…Base frame 81A…Mask attachment part 81B…First cushion attachment part 81C…Second cushion attachment part 81D…Glass position control part 81D1...First position regulation part 81D2...Second position regulation part 81D3…Third position control part 81D4…Fourth position control part 81E…Pin hole 81F…Notch 81G…Common fastening part 81G1...Screw hole 81H…Abutting surface 82...Infrared cut filter 83...Mask plate 84…Cover glass 85...Piezo element 86...First cushion member 87...Second cushion member 88...Third cushion member 90…Cover member 91...Cover member body 91A…Front cover 91B…Outer cover part 91L…Outer cover part 91R…Outer cover part 91T…Outer cover part 92…Screw fastening part 92A...Screw hole 92B…First pin hole 93...Seat part 93A…Second pin hole 94A…Hook section 94A1…Opening 94A2…Bent section 94B…Hook section 94B1…Opening 94B2…Bent section 111…First positioning pin 112…Second positioning pin 113…Third positioning pin 114A…Claw part 114A1...Tapered surface 114B...Claw part 114B1...Tapered surface 115…Screw hole 116…Screw Os…Reference point Zs…Optical axis

Claims

1. An imaging element; A first optical element disposed on the object side of the image sensor; a second optical element disposed on the object side of the first optical element; A first holding member that holds the imaging element; a second holding member that holds the first optical element; a third holding member that holds the second optical element and the second holding member by sandwiching them between the first holding member and the third holding member; Equipped with the first holding member has a first hole into which a screw is fastened, and a first convex portion and a second convex portion, and is arranged in a region where the first hole, the first convex portion, and the second convex portion face each other across a light receiving surface of the image sensor; the second holding member has a second hole through which the screw is inserted, the third holding member has a third hole through which the screw is inserted, a first opening that engages with the first protrusion, and a second opening that engages with the second protrusion. Imaging unit.

2. The second optical element is vibrated. The imaging unit according to claim 1 .

3. The first hole is provided along the optical axis, The first convex portion and the second convex portion are provided to protrude in a direction intersecting an optical axis. The imaging unit according to claim 1 .

4. the first holding member has a frame-shaped holding portion in which the imaging element is housed, The first hole is provided in an end surface of the holding portion, The first protrusion and the second protrusion are provided on an outer periphery of the holding portion. The imaging unit according to claim 3 .

5. the first holding member has a thickness of the holding portion at a portion where the first protrusion and the second protrusion are arranged, the thickness of the holding portion at a portion where the first hole is arranged, The imaging unit according to claim 4.

6. the first holding member has a third convex portion and a fourth convex portion protruding in a direction of the optical axis, the second holding member has a third opening that engages with the third protrusion, the third holding member has a fourth opening that engages with the fourth protrusion; The imaging unit according to claim 1 .

7. the engagement between the third protrusion and the third opening restricts movement of the second holding member in a direction intersecting with the optical axis; the fourth protrusion engages with the fourth opening, restricting movement of the third holding member in a direction intersecting with the optical axis; The imaging unit according to claim 6.

8. the first holding member further includes a fifth protrusion protruding in a direction of the optical axis, the second holding member further includes a first fifth opening that engages with the fifth protrusion and restricts movement in a direction intersecting the optical axis, the third holding member further has a second fifth opening that engages with the fifth protrusion to restrict movement in a direction intersecting the optical axis; The imaging unit according to claim 7.

9. The third convex portion and the fourth convex portion have a height-to-width ratio different from that of the fifth convex portion. The imaging unit according to claim 8.

10. The fifth protrusion is disposed adjacent to the first hole. The imaging unit according to claim 9.

11. The third holding member has an adhesive portion that is adhered to the first holding member and / or the second holding member. The imaging unit according to claim 1 .

12. the third holding member has the adhesive portion in a region facing the first hole across a light receiving surface of the imaging element; The imaging unit according to claim 11.

13. the third holding member has the adhesive portion at both ends in a longitudinal direction of a region facing the first hole across a light receiving surface of the imaging element; The imaging unit according to claim 12.

14. the first holding member is made of a resin molded product, and has an open space on at least the image side of the first convex portion and the second convex portion. The imaging unit according to claim 1 .

15. the first convex portion and the second convex portion have a tapered shape in which a protruding amount decreases from the image side to the object side, The imaging unit according to claim 14.

16. The screw is a tapping screw, and the screw is fastened into the first hole by self-tapping. The imaging unit according to claim 1 .

17. a fourth holding member that holds the first holding member movably within a plane intersecting the optical axis; A drive unit that drives the first holding member; The imaging unit according to claim 1 , further comprising:

18. The driving unit is composed of a voice coil motor, the first holding member has a coil holding portion that houses and holds a coil of the voice coil motor, the coil holding portion is disposed adjacent to a region in which the first protrusion and the second protrusion are disposed. The imaging unit according to claim 17.

19. At least a part of the first protrusion and the second protrusion is arranged to overlap with the coil holding portion. The imaging unit according to claim 18.

20. the first holding member is made of a resin molded product, and has an open space on the image side of the first convex portion and the second convex portion. The imaging unit according to claim 19.

Images