Lens drive device, lens unit, and camera

Abstract

To achieve both an increase in the thrust of a voice coil motor and a reduction in the size of a lens driving device.SOLUTION: A plate-like coil (40) facing magnets (38) is provided on an outer peripheral wall side of a lens holder (30). The coil (40) is inserted into a yoke (36) movably in an optical axis direction. Both end sides of the coil (40) project from the yoke (36). The end sides of the coil (40) are bent to approach an optical axis of a lens (20).SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lens driving device that moves a lens in the optical axis direction, a lens unit, and a camera.

Background Art

[0002] As a prior art of a lens driving device, there is one shown in Patent Document 1. The lens driving device according to that prior art (referred to as an electromagnetic driving device in Patent Document 1) includes a lens holder (referred to as a driven body in Patent Document 1) that holds a lens. The lens holder is provided movably in the optical axis direction in a lens barrel (referred to as a barrel in Patent Document 1). The lens driving device according to the prior art includes a voice coil motor for moving the lens holder in the optical axis direction.

[0003] The voice coil motor has two yoke plates (referred to as the first yoke and the second yoke in Patent Document 1) provided facing the inner peripheral wall side of the lens barrel, and a magnet provided on one of the yoke plates. The voice coil motor has a flat coil (referred to as a movable coil in Patent Document 1) provided on the outer peripheral wall side of the lens holder, and the coil faces the magnet.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In recent years, there has been an increasing demand for increasing the thrust of voice coil motors and miniaturizing lens driving devices used in cameras and the like. On the other hand, if an attempt is made to increase the thrust of a voice coil motor, the voice coil motor becomes larger, making it difficult to miniaturize the lens driving device.

[0006] Therefore, one aspect of the present invention aims to achieve both increased thrust of the voice coil motor and miniaturization of the lens drive device. [Means for solving the problem]

[0007] To solve the aforementioned problems, a lens driving device according to one aspect of the present invention comprises a lens holder that is movably provided in the lens barrel in the optical axis direction and holds a lens, and a voice coil motor for moving the lens holder in the optical axis direction. The voice coil motor comprises a yoke provided on the inner circumferential wall side of the lens barrel and having a hollow portion on the inside, a magnet provided on the inner surface of the yoke, and a flat plate-shaped coil provided on the outer circumferential wall side of the lens holder, inserted into the yoke so as to be movably in the optical axis direction and facing the magnet, the ends of the coil protrude from the yoke, and each end of the coil is bent so as to approach the optical axis of the lens.

[0008] Furthermore, a lens unit according to one aspect of the present invention comprises a lens barrel, a lens disposed within the lens barrel, and a lens driving device according to one aspect of the present invention for moving the lens in the direction of the optical axis.

[0009] Furthermore, a camera according to one aspect of the present invention comprises a camera body and a lens unit according to one aspect of the present invention provided on the camera body. [Effects of the Invention]

[0010] According to one aspect of the present invention, it is possible to achieve both increased thrust of the voice coil motor and miniaturization of the lens drive device. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic side view of the camera according to this embodiment. [Figure 2] This is a schematic perspective view of the lens drive device according to this embodiment. [Figure 3] Figure 2 is a schematic cross-sectional view of the lens drive device. [Figure 4] This is an enlarged view of IV in Figure 3. [Figure 5] This figure shows the state of a flat coil before and after bending. [Figure 6] This is a schematic diagram illustrating the clamping member. [Figure 7] This figure shows how the clamping member is tilted and adjusted according to the bending state of the coil's end. [Figure 8] This figure shows how the clamping member is tilted and adjusted according to the bending state of the coil's end. [Figure 9] This is a schematic diagram showing how the end of a coil is clamped by a clamping member according to another embodiment of this invention. [Modes for carrying out the invention]

[0012] The following description of this embodiment will be made with reference to the drawings. "Optical axis" refers to the optical axis of a lens such as a focusing lens or the optical axis of a lens unit. "Optical axis direction" refers to the axial direction of the optical axis, and in this embodiment, it refers to the front-to-back direction. "Radial direction" refers to the radial direction of a lens such as a focusing lens or the radial direction of the lens barrel. In the drawings, "OA" refers to the optical axis, "AD" refers to the optical axis direction, "FF" refers to the front direction, and "FR" refers to the rear direction.

[0013] [This embodiment] Referring to Figure 1, the overview of the camera according to this embodiment will be described. Figure 1 is a schematic side view of the camera according to the embodiment of the present invention.

[0014] (Overview of Camera 10) As shown in Figure 1, the camera 10 according to this embodiment comprises a camera body 12 and a lens unit 14 provided on the camera body 12. The lens unit 14 forms an image of the incident light on the film surface (image sensor surface) F inside the camera body 12.

[0015] The lens unit 14 includes a lens barrel 16 provided in the camera body 12. A plurality of fixed lenses 18 are arranged in the lens barrel 16. In the lens barrel 16, a focus lens 20 for focus adjustment is arranged so as to be movable in the optical axis direction (front-rear direction). Further, the lens unit 14 includes a lens driving device 22 that moves the focus lens 20 in the optical axis direction.

[0016] A focus ring 24 for manually operating the movement amount of the focus lens 20 is rotatably provided on the outer peripheral wall of the lens barrel 16. When the photographer rotates the focus ring 24, the lens driving device 22 moves the focus lens 20 in the optical axis direction based on the operation amount.

[0017] A release button 26 for performing focusing by automatic focus is provided on the outer wall of the camera body 12. When the photographer half-presses the release button 26, the lens driving device 22 moves the focus lens 20 in the optical axis direction so that the image of the subject is in focus on the film F based on a control signal from an automatic focus control unit 28 built in the camera body 12.

[0018] Subsequently, referring to FIGS. 2 to 5, an outline of the lens driving device 22 according to the present embodiment will be described. FIG. 2 is a schematic perspective view of the lens driving device according to the embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of the lens driving device shown in FIG. 2. FIG. 4 is an enlarged view of IV in FIG. 3. FIG. 5 is a diagram showing the state before bending and the state after bending of a flat coil. VA in FIG. 5 is a cross-sectional view taken along line A-A in VB in FIG. 5. VB in FIG. 5 is a diagram showing the state before bending of the flat coil. VC in FIG. 5 is a cross-sectional view taken along line C-C in VD in FIG. 5. VD in FIG. 5 is a diagram showing the state after bending of the flat coil.

[0019] (Outline of the lens driving device 22, lens holder 30, voice coil motor 34) As shown in Figures 2 and 3, the lens drive device 22 according to this embodiment is a device that moves the focus lens 20 in the optical axis direction (front-to-back direction), as described above. The lens drive device 22 includes a lens holder 30 that holds the focus lens. The lens holder 30 is provided within the lens barrel 16 so as to be movable in the optical axis direction via a pair of guide rods 32. The lens drive device 22 includes a pair of voice coil motors 34 for moving the lens holder 30 in the optical axis direction.

[0020] (York 36) As shown in Figures 2 to 4, each voice coil motor 34 has a box-shaped yoke 36 provided on the inner circumferential wall 16i side of the lens barrel 16. The yoke 36 has a hollow portion 36h inside. Both sides of each yoke 36 in the direction perpendicular to the radial direction are open. Each yoke 36 is made of a magnetic material. Note that the yoke 36 is not limited to a box shape, but may also be shelf-shaped, as long as it has a hollow portion 36h.

[0021] (Magnet 38) As shown in Figures 3 and 4, each voice coil motor 34 has magnets 38 provided on both inner surfaces 36i of the yoke 36 in a direction perpendicular to the optical axis. In the hollow portion 36h of the yoke 36 of each voice coil motor 34, the pair of magnets 38 are arranged so that their different magnetic poles face each other. Each magnet 38 is a rectangular plate-shaped permanent magnet and may be bonded to the inner surface 36i of the yoke 36.

[0022] (Coil 40) As shown in Figures 2 to 5, each voice coil motor 34 has a flat coil 40 provided on the outer peripheral wall 30e side of the lens holder 30. Each coil 40 is formed in an annular (frame-shaped) manner, and the contour shape of each coil 40 is formed in a substantially rectangular shape. The winding of each coil 40 is wound around an axis perpendicular to the optical axis direction. Each coil 40 faces two magnets 38 and is inserted into the yoke 36 so as to be movable in the optical axis direction. Note that instead of forming the contour shape of each coil 40 in a substantially rectangular shape, it may be formed in a circular, fan-shaped, rhombus-shaped, or trapezoidal shape, for example.

[0023] Both ends of each coil 40 protrude from the yoke 36. Each end of each coil 40 is bent along the outer peripheral wall 30e of the lens holder 30 so as to approach the optical axis (center of the focus lens 20) of the focus lens 20. VA and VB in Figure 5 show the state of the flat coil 40 before bending, and VC and VD in Figure 5 show the state of the flat coil 40 after bending.

[0024] (Magnetic circuits, etc.) In each voice coil motor 34, the yoke 36 is configured to guide the magnetism of the magnet 38 to the coil 40, forming a closed annular magnetic circuit. The yoke 36 and the two magnets 38 form a magnetic circuit. When current flows through the winding of the coil 40 in each voice coil motor 34, the magnetic circuit generates a driving force in the optical axis direction, causing the coil 40 to move in the optical axis direction. As a result, the lens holder 30 and the focus lens 20 move integrally with the coil 40 in the optical axis direction.

[0025] Next, the configuration of the voice coil motor 34 and its surroundings according to this embodiment will be described with reference to Figures 2 to 8. Figure 6 is a schematic diagram for illustrating the clamping member. VIA in Figure 6 is a schematic diagram showing a clamping member with linear projections formed on the inside of the claw portion. VIB in Figure 6 is a cross-sectional view along line BB in VIA in Figure 6. VIC in Figure 6 is a schematic diagram showing a clamping member with a plurality of mountain-shaped projections formed on the inside of the claw portion. VID in Figure 6 is a cross-sectional view along line DD in VIC in Figure 6. VIE in Figure 6 is a schematic diagram showing a clamping member with a plurality of frustoconical projections formed on the inside of the claw portion. VIF in Figure 6 is a cross-sectional view along line FF in VIE in Figure 6.

[0026] (Notch 30n) As shown in Figure 3, notches (notched surfaces) 30n are formed in the outer peripheral wall 30e of the lens holder 30 at the portions facing each yoke 36, along a direction perpendicular to the radial direction. Note that the notches 30n of the lens holder 30 do not need to be parallel to the direction perpendicular to the radial direction, as long as they are along the direction perpendicular to the radial direction.

[0027] (Mounting section 30m) As shown in Figures 2 and 3, three mounting portions 30m are formed on the outer peripheral wall 30e of the lens holder 30 at intervals in the circumferential direction. Each mounting portion 30m of the lens holder 30 has a mounting surface 30f with a circular arc cross-section. One of the three mounting portions 30m of the lens holder 30 is supported by the guide rod 32 so as to be movable in the optical axis direction.

[0028] (Holding member 42) As shown in Figures 2 to 4, each mounting portion 30m of the lens holder 30 is provided with a clamping member 42 that can be tilted and adjusted around an axis parallel to the optical axis direction, for clamping the end of the coil 40 of each voice coil motor 34. One of the three mounting portions 30m of the lens holder 30 is provided with two clamping members 42. One of the two clamping members 42 clamps the end of the coil 40 of one voice coil motor 34. The other clamping member 42 clamps the end of the coil 40 of the other voice coil motor 34. Each clamping member 42 is made of synthetic resin. Each clamping member 42 has a cross-sectional arc-shaped connecting surface 42f that fits into and connects with the mounting surface 30f of each mounting portion 30m of the lens holder 30. As described above, each clamping member 42 clamps the end of each coil 40, so that each coil 40 is provided on the outer peripheral wall 30e side of the lens holder 30 via two clamping members 42.

[0029] As shown in Figures 3 and 4, each clamping member 42 has a pair of claws 42c for clamping the end of the coil 40. As shown in VIA and VIB of Figure 6, a linear projection 42p is formed on the inside of each claw 42c of each clamping member 42, which contacts the end of the coil 40. The cross-sectional shape of the linear projection 42p is mountain-shaped. The distance between the projections 42p of the pair of claws 42c of each clamping member 42 is set to be the same as the thickness dimension of the end of the coil 40. The projections 42p of the pair of claws 42c of each clamping member 42 and the end of the coil 40 may be bonded together with an adhesive.

[0030] Instead of forming linear projections 42p on the inside of each claw portion 42c of each clamping member 42, multiple mountain-shaped projections 42p may be formed as shown in VIC and VID of Figure 6, or multiple frustoconical projections 42p may be formed as shown in VIE and VIF of Figure 6.

[0031] (Tilt adjustment of clamping member 42) The tilt adjustment of the clamping member 42 will be explained with reference to Figures 3, 5, 7, and 8. Figures 7 and 8 show the clamping member adjusted to tilt according to the bending state of the coil end. Figure 7, VIIA shows the clamping member adjusted to tilt when the bending angle of the coil end is smaller than the standard bending angle. Figure 7, VIIB shows the clamping member adjusted to tilt when the bending angle of the coil end is larger than the standard bending angle. Figure 8, VIIIA shows the clamping member adjusted to tilt when the bending width of the coil end is smaller than the standard bending width. Figure 8, VIIIB shows the clamping member adjusted to tilt when the bending width of the coil end is larger than the standard bending width.

[0032] As shown in Figure 3, the tilt adjustment of the clamping member 42 is performed using a jig (not shown) having two shafts that simulate the two mounting parts 30m of the lens holder 30. Then, as shown in VIIA of Figure 7, if the bending angle θ at the end of the coil 40 (see VC in Figure 5) is smaller than the reference bending angle, the tilt adjustment of the clamping member 42 is performed so that the clamping member 42 is displaced counterclockwise from the reference mounting position (position shown by the dashed line) in VIIA of Figure 7. As shown in VIIB of Figure 7, if the bending angle θ at the end of the coil 40 is larger than the reference bending angle, the tilt adjustment of the clamping member 42 is performed so that the clamping member 42 is displaced clockwise from the reference mounting position (position shown by the dashed line) in VIIB of Figure 7.

[0033] As shown in VIIIA of Figure 8, if the bending width W at the end of the coil 40 (see VC in Figure 5) is smaller than the standard bending width, the clamping member 42 is tilted so that it is displaced counterclockwise from the standard mounting position (position shown by dashed line) in VIIIA of Figure 8. As shown in VIIIB of Figure 8, if the bending width W at the end of the coil 40 is larger than the standard bending width, the clamping member 42 is tilted so that it is displaced clockwise from the standard mounting position in VIIIB of Figure 8.

[0034] (Effects and Benefits) Next, the effects and advantages of the embodiments of the present invention will be described.

[0035] In the lens drive device 22, as described above, each end of each coil 40 is bent along the outer circumferential wall of the lens holder 30 so that it approaches the optical axis of the focus lens 20. Therefore, according to this embodiment, compared to the case where both ends of the coil 40 are not bent, the lens drive device 22 can be made smaller, in other words, the lens unit 14 and the camera 10 can be made smaller.

[0036] Furthermore, in the lens drive device 22, as described above, both ends of each coil 40 protrude from the yoke 36. Therefore, according to this embodiment, high thrust can be achieved in the voice coil motor 34 without generating thrust in a direction different from the optical axis direction. If both ends of each coil 40 were located inside the yoke 36, the direction of the current at both ends of each coil 40 would not be perpendicular to the direction of the magnetic field from the magnet 38 and the optical axis direction, thus generating thrust in a direction different from the optical axis direction.

[0037] In other words, according to this embodiment, it is possible to achieve both increased thrust of the voice coil motor 34 and miniaturization of the lens drive device 22.

[0038] Furthermore, in the lens drive device 22, as described above, a notch 30n is formed in the outer peripheral wall 30e of the lens holder 30 at the portion facing the yoke 36, along a direction perpendicular to the radial direction of the focus lens 20. Therefore, the coil 40 can be positioned closer to the optical axis of the focus lens 20 by the amount of the notch 30n. As a result, according to this embodiment, it is possible to miniaturize the lens drive device, in other words, to miniaturize the lens unit 14 and the camera 10.

[0039] Furthermore, in the lens drive device 22, as described above, clamping members 42 are provided on each mounting portion 30m of the lens holder 30 so as to be adjustable to tilt around an axis parallel to the optical axis direction. Therefore, even if there is variation in the bending angle θ or bending width W at the end of the coil 40, this variation can be absorbed by adjusting the tilt of each clamping member 42, and a small gap can be maintained between the magnet 38 and the coil 40. As a result, according to this embodiment, sufficient effective magnetic flux contributing to the generation of thrust in the voice coil motor 34 can be secured, thereby promoting the increase in thrust of the voice coil motor 34.

[0040] Furthermore, in the lens drive device 22, as described above, each mounting portion 30m of the lens holder 30 has a mounting surface 30f with a circular arc cross-section. Each clamping member 42 has a connecting surface 42f with a circular arc cross-section that fits into and connects with the mounting surface 30f of each mounting portion 30m of the lens holder 30. Therefore, according to this embodiment, the tilt adjustment of each clamping member 42 can be performed with high precision.

[0041] Furthermore, in the lens drive device 22, as described above, linear projections 42p or a plurality of projections 42p are formed on the inside of each claw portion 42c of each clamping member 42, which contact the end side of the coil 40. Therefore, according to this embodiment, the end side of the coil 40 can be stably clamped by each clamping member 42, and the mounting state of the coil 40 to the outer peripheral wall 30e side of the lens holder 30 is stabilized.

[0042] [Modified versions of this embodiment] Referring to Figure 9, a modified clamping member of this embodiment will be described. Figure 9 is a schematic diagram showing how the end of a coil is clamped by a clamping member of another embodiment. For the sake of explanation, members having the same function as those described in this embodiment will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0043] (Leaf spring 44) As shown in Figure 9, in the modified clamping member 42A of this embodiment, one of the pair of claw portions 42c is made of a leaf spring 44. The leaf spring 44 is formed in an inverted U shape, and a linear projection 44p is formed on the inside of the leaf spring 44 that abuts against the end side of the coil 40. Therefore, according to the modified embodiment, the configuration of each clamping member 42A can be simplified, thereby reducing the manufacturing cost of the lens drive device 22 (see Figure 2).

[0044] [Other aspects of this embodiment] The configuration of the lens drive device 22 described above may also be applied to other lens drive devices (not shown) that move a zoom lens (not shown) in the optical axis direction for zoom adjustment.

[0045] 〔summary〕 A lens driving device according to embodiment 1 of the present invention comprises a lens holder that is movable in the optical axis direction within a lens barrel and holds a lens, and a voice coil motor for moving the lens holder in the optical axis direction. The voice coil motor comprises a box-shaped yoke having a hollow portion on the inside and provided on the inner circumferential wall side of the lens barrel, a magnet provided on the inner surface of the yoke, and a flat plate-shaped coil provided on the outer circumferential wall side of the lens holder, inserted into the yoke so as to be movable in the optical axis direction and facing the magnet, the ends of the coil protrude from the yoke, and each end of the coil is bent so as to approach the optical axis of the lens (the center of the lens).

[0046] According to the above configuration, as described above, each end of the coil is bent so as to approach the optical axis of the lens. Therefore, the lens driving device can be made smaller compared to the case where both ends of the coil are not bent. Also, as described above, both ends of the coil protrude from the yoke. Therefore, the voice coil motor can achieve high thrust without generating thrust in a direction different from the optical axis direction. In other words, it is possible to achieve both high thrust of the voice coil motor and miniaturization of the lens driving device.

[0047] In the lens driving device according to embodiment 2 of the present invention, in embodiment 1, a notch may be formed in the portion of the outer peripheral wall of the lens holder facing the yoke, along a direction perpendicular to the radial direction of the lens.

[0048] According to the above configuration, the coil can be positioned so that it is closer to the optical axis of the lens by the amount of the notch. Therefore, it is possible to miniaturize the lens driving device.

[0049] The lens driving device according to embodiment 3 of the present invention further comprises, in embodiment 1 or 2, a plurality of mounting portions formed on the outer peripheral wall of the lens holder at intervals in the circumferential direction, and a clamping member provided on each mounting portion of the lens holder so as to be tiltable and adjustable around an axis parallel to the optical axis direction, which clamps the end side of the coil.

[0050] According to the above configuration, even if there are variations in the bending angle or bending width at the end of the coil, these variations can be absorbed by adjusting the tilt of the clamping member, maintaining a small gap between the magnet and the coil. This ensures sufficient effective magnetic flux that contributes to the generation of thrust in the voice coil motor, thereby promoting the creation of a high thrust in the voice coil motor.

[0051] In the lens driving device according to embodiment 4 of the present invention, in embodiment 3, each mounting portion of the lens holder has a mounting surface with a circular arc cross-section, and each clamping member has a connecting surface with a circular arc cross-section that fits into and connects with the mounting surface of each mounting portion of the lens holder.

[0052] With the above configuration, the tilt adjustment of each clamping member can be performed with high precision.

[0053] In the lens driving device according to embodiment 5 of the present invention, in embodiment 3 or 4, each clamping member has a pair of claws for clamping the end side of the coil, and a projection is formed on the inside of each claw to abut against the end side of the coil.

[0054] According to the above configuration, the end of the coil can be stably clamped by each clamping member, and the mounting state of the coil to the outer peripheral wall of the lens holder is stabilized.

[0055] In the lens driving device according to embodiment 6 of the present invention, in any of embodiments 3 to 5, one of the pair of claw portions of each clamping member may be made of a leaf spring.

[0056] According to the above configuration, the structure of each clamping member can be simplified, thereby reducing the manufacturing cost of the lens driving device.

[0057] A lens unit according to embodiment 7 of the present invention comprises a lens barrel, a lens disposed within the lens barrel, and a lens driving device according to any of embodiments 1 to 6 for moving the lens in the direction of the optical axis.

[0058] According to the above configuration, it is possible to achieve both increased thrust of the voice coil motor and miniaturization of the lens unit equipped with the lens drive device.

[0059] A camera according to embodiment 8 of the present invention comprises a camera body and a lens unit according to embodiment 7 provided on the camera body.

[0060] With the above configuration, it is possible to achieve both increased thrust of the voice coil motor and miniaturization of the camera equipped with the lens unit.

[0061] [Additional Notes] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in each embodiment are also included within the technical scope of the present invention. [Explanation of symbols]

[0062] 10 Cameras 12 Camera Body 14 Lens Unit 16 Lens barrel 16i Inner wall 18 Fixed Lens 20 Focus Lenses (Lenses) 22 Lens drive device 24 Focus Ring 26 Release button 28 Autofocus control unit 30 Lens Holder 30e outer wall 30n notch 30m mounting section 30f Mounting surface 32 Guide Rods 34 Voice coil motor 36 York 36h Hollow part 36i inner side 38 Magnets 40 coils 42 Clamping member 42f Connecting surface 42c Claw part 42p protrusion 42A Clamping Member 44 Leaf springs

Claims

1. A lens holder is provided within the lens barrel so as to be movable in the optical axis direction and holds the lens, The lens holder is equipped with a voice coil motor for moving it in the direction of the optical axis, The aforementioned voice coil motor is A yoke provided on the inner circumferential wall side of the lens barrel, having a hollow portion on the inside, A magnet provided on the inner surface of the yoke, The lens holder is provided on the outer peripheral wall side, is inserted into the yoke so as to be movable in the optical axis direction, and has a flat plate-shaped coil facing the magnet, A lens driving device wherein both ends of the coil protrude from the yoke, and each end of the coil is bent to approach the optical axis of the lens.

2. The lens driving device according to claim 1, wherein a notch is formed in the outer peripheral wall of the lens holder in a portion facing the yoke, along a direction perpendicular to the radial direction of the lens.

3. Multiple mounting portions are formed on the outer circumferential wall of the lens holder at intervals in the circumferential direction. The lens driving device according to claim 1, further comprising a clamping member provided at each mounting portion of the lens holder so as to be tiltable and adjustable around an axis parallel to the optical axis direction, for clamping the end side of the coil.

4. The lens driving device according to claim 3, wherein each mounting portion of the lens holder has a mounting surface with a circular arc cross-section, and each clamping member has a connecting surface with a circular arc cross-section that fits into and connects with the mounting surface of each mounting portion of the lens holder.

5. The lens driving device according to claim 3, wherein each clamping member has a pair of claws for clamping the end of the coil, and a projection is formed on the inside of each claw for contacting the end of the coil.

6. The lens driving device according to claim 3, wherein each clamping member has a pair of claws for clamping the end of the coil, and one of the pair of claws is made of a leaf spring.

7. Lens barrel and The lens arranged inside the lens barrel, A lens unit comprising a lens driving device according to any one of claims 1 to 6 for moving the lens in the optical axis direction.

8. Camera body and A camera comprising a lens unit according to claim 7 provided on the camera body.

Images