Unit with vibration compensation function

Abstract

This reduces the risk of movable parts detaching even when subjected to strong impacts. [Solution] The vibration correction unit 1 includes a gimbal mechanism 7 connecting a movable body 4 and a support body 6. The movable body 4 includes a pair of first support parts 99 that support the first sway support part 71 of the gimbal mechanism 7. The support body 6 includes a pair of second support parts that support the second sway support part of the gimbal mechanism 7. Furthermore, it includes a pair of first stopper parts S1 that face the pair of first support parts 99 in the axial direction along the central axis L, and a pair of second stopper parts S2 that face the pair of second support parts in the axial direction. The first stopper parts S1 hold the first sway support part 71 by sandwiching it between themselves and the first support parts 99. The second stopper parts S2 hold the second sway support part by sandwiching it between themselves and the second support parts.

Description

Technical Field

[0001] The present invention relates to a unit with a shake correction function.

Background Art

[0002] Patent Document 1 describes an optical unit with a shake correction function that swings a movable body equipped with an optical module for photography around a first axis intersecting the optical axis of the optical module and around a second axis intersecting the optical axis and the first axis. The optical unit with a shake correction function in Patent Document 1 supports the movable body so as to be swingable using a gimbal mechanism.

[0003] The gimbal mechanism of Patent Document 1 includes a rectangular frame-shaped movable frame (gimbal frame), a pair of leaf springs arranged at diagonal positions in the first axis direction of the movable body, and a pair of leaf springs arranged at diagonal positions in the second axis direction of the fixed body. Metal spheres are fixed by welding at the diagonal positions in the first axis direction and the diagonal positions in the second axis direction of the movable frame. Each of the four leaf springs has a hemispherical recess. The recess makes point contact with the sphere welded to the movable frame by the elastic force of the leaf spring. Thereby, the movable body is supported in a state swingable around the first axis and the second axis with respect to the fixed body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a structure where a movable body and a support are connected by a gimbal mechanism, if a strong impact is applied, such as from a fall, the components of the gimbal mechanism may deform significantly, potentially causing the movable body to detach from the gimbal mechanism. Alternatively, the components of the gimbal mechanism may detach from the movable body and the support, resulting in the movable body detaching from the gimbal mechanism.

[0006] In view of these points, the object of the present invention is to reduce the risk of the movable body falling off even when a strong impact is applied, in a unit with a touch correction function that supports a movable body equipped with an object to be oscillated, such as an optical module, so as to be able to swing using a gimbal mechanism. [Means for solving the problem]

[0007] To solve the above problems, one embodiment of the vibration correction unit according to the present invention comprises a movable body and a support body, and a gimbal mechanism that connects the movable body and the support body and supports the movable body so that it can swing relative to the support body, wherein the axis passing through the pivot center of the movable body and the axis intersecting the pivot center are defined as the first axis, and the axis intersecting the central axis and the first axis at the pivot center are defined as the second axis, the gimbal mechanism comprises a gimbal frame, a pair of first swing support parts that make point contact with the gimbal frame on the first axis, and a pair of first swing support parts that make point contact with the gimbal frame on the second axis The movable body comprises a pair of first support parts that support the pair of first swing support parts, the support body comprises a pair of second support parts that support the pair of second swing support parts, and further comprises a pair of first stopper parts that face the pair of first support parts in an axial direction along the central axis, and at least one of a pair of second stopper parts that face the pair of second support parts in an axial direction, wherein the first stopper parts hold the first swing support parts between themselves and the first support parts, and the second stopper parts hold the second swing support parts between themselves and the second support parts. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view of the unit with shake correction function. [Figure 2] Figure 2 is an external perspective view of the unit with shake correction function with the cover removed. [Figure 3] Figure 3 is an exploded perspective view of the unit with shake correction function. [Figure 4] Figure 4 is an exploded perspective view of the first stopper member, gimbal mechanism, and holder. [Figure 5] Figure 5 is a cross-sectional view of the unit with runout compensation function, cut along a plane including the first and second axes. [Figure 6] Figure 6 shows a cross-sectional view of the unit with vibration compensation function, cut along a plane including the first axis and the central axis, and a partially enlarged view of the first rocking support section. [Figure 7] Figure 7 shows a cross-sectional view of the unit with vibration compensation function, cut along a plane including the second axis and the central axis, and a partially enlarged view of the second rocking support section. [Figure 8] Figure 8 is a perspective view showing the first magnet and the second magnet positioned by the second stopper member and fixed to the cover. [Figure 9] Figure 9 is an exploded perspective view of the contact member and the spring member. [Figure 10] Figure 10 is an exploded perspective view showing the state in which the angle of the notch of the first stopper member and the projection provided on the cylindrical part of the holder are aligned. [Figure 11] Figure 11 is a perspective view showing the first stopper member fitted into the holder, and is a perspective view showing the state before the first stopper member is locked by the projection. [Figure 12] Figure 12 is a perspective view showing the first stopper member locked by the projection. [Modes for carrying out the invention]

[0009] An embodiment of a unit with a vibration compensation function to which the present invention is applied will be described below with reference to the drawings.

[0010] Figure 1 is an external perspective view of the vibration compensation unit 1. Figure 2 is an external perspective view of the vibration compensation unit 1 with the cover 3 removed. Figure 3 is an exploded perspective view of the vibration compensation unit 1. Figure 4 is an exploded perspective view of the first stopper member 11, the gimbal mechanism 7, and the holder 9. Figure 5 is a cross-sectional view of the vibration compensation unit 1 cut along a plane including the first axis R1 and the second axis R2. Figure 6 is a cross-sectional view of the vibration compensation unit 1 cut along a plane including the first axis R1 and the central axis L, and a partially enlarged view of the first oscillating support part 71. Figure 7 is a cross-sectional view of the vibration compensation unit 1 cut along a plane including the second axis R2 and the central axis L, and a partially enlarged view of the second oscillating support part 72.

[0011] The vibration compensation unit 1 performs a tilting motion to swing the movable body 4 on which the object to be oscillated is placed. The object to be oscillated is not particularly limited, but examples include optical modules equipped with optical components such as lenses and prisms, reflective components such as mirrors, and light-emitting elements such as antennas and laser diodes. The vibration compensation unit 1 swings the movable body 4 based on control signals from a higher-level device, for example. Note that the movable body 4 may not include the object to be oscillated, but may be equipped with a member that holds the object to be oscillated.

[0012] The following describes an embodiment of the image stabilization unit 1 when the object being shaken is the camera module 2. The image stabilization unit 1 is intended to be incorporated into action cameras that are mounted on various pieces of equipment. For example, the image stabilization unit 1 can be mounted on hunting bowguns, shotguns, etc.

[0013] (Overall structure) As shown in Figures 1 to 7, the unit 1 with image stabilization function comprises a movable body 4 equipped with a camera module 2, a support body 6 comprising a case 5 surrounding the outer circumference of the movable body 4 and a cover 3 fixed to the case 5, a gimbal mechanism 7 connecting the movable body 4 and the support body 6, and a mechanism that swings the movable body 4. It includes a swing magnetic drive mechanism 8 that generates a magnetic driving force for swinging. As shown in FIGS. 3, 6, and 7, the camera module 2 includes a lens 21 that constitutes an imaging optical system, a lens barrel 22 that holds the lens 21, and a substrate 23 on which an imaging element is mounted.

[0014] As shown in FIGS. 5, 6, and 7, the swing center P of the movable body 4 is located on the central axis L of the camera module 2. The central axis L coincides with the optical axis of the camera module 2. In the following description, the direction along the central axis L is defined as the axial direction, one side of the axial direction is defined as L1, and the other side of the axial direction is defined as L2. One side L1 of the axial direction coincides with the subject side of the camera module 2, and the other side L2 of the axial direction coincides with the image side of the camera module 2.

[0015] In the following description, three axes orthogonal to each other are defined as the X-axis, Y-axis, and Z-axis. The direction along the X-axis is defined as the X-axis direction, the direction along the Y-axis is defined as the Y-axis direction, and the direction along the Z-axis is defined as the Z-axis direction. Also, one side of the X-axis direction is defined as the X1 direction, the other side of the X-axis direction is defined as the X2 direction, one side of the Y-axis direction is defined as the Y1 direction, the other side of the Y-axis direction is defined as the Y2 direction, one side of the Z-axis direction is defined as the Z1 direction, and the other side of the Z-axis direction is defined as the Z2 direction. The Z-axis coincides with the central axis L when the camera module 2, which is the object to be swung, is located at the origin position. The Z1 direction coincides with one side L1 of the axial direction, and the Z2 direction coincides with the other side L2 of the axial direction.

[0016] The gimbal mechanism 7 supports the movable body 4 so as to be swingable about the first axis R1 and also supports the movable body 4 so as to be swingable about the second axis R2. The first axis R1 and the second axis R2 intersect each other and intersect at the swing center P of the movable body 4 with respect to the central axis L. The first axis R1 and the second axis R2 are inclined with respect to the X-axis and the Y-axis around the Z-axis. In this embodiment, the first axis R1 and the second axis R2 are inclined at 45° with respect to the X-axis and the Y-axis around the Z-axis. In the following description, the direction along the first axis R1 is defined as the first axis direction, and the direction along the second axis R2 is defined as the second axis direction.

[0017] The unit 1 with a shake correction function performs a combination of an operation of swinging the movable body 4 around the first axis R1 centered on the first axis and an operation of swinging the movable body 4 around the second axis R2 centered on the second axis. Thereby, the angular position of the object to be swung disposed on the movable body 4 around the X axis and the angular position around the Y axis are adjusted.

[0018] The unit 1 with a shake correction function includes a first stopper member 11 disposed on the movable body 4 and a second stopper member 12 disposed on the support body 6. The first stopper member 11 prevents components constituting the gimbal mechanism 7 from being deformed or falling off from the movable body 4. The second stopper member 12 prevents components constituting the gimbal mechanism 7 from being deformed or falling off from the support body 6.

[0019] (Holder) As shown in FIGS. 3, 4, 5, 6, and 7, the movable body 4 includes a camera module 2 and a holder 9 that holds the camera module 2. The holder 9 includes a cylindrical portion 91 extending in the axial direction, a wall portion 92 surrounding the outer periphery of the cylindrical portion 91, and a connecting portion 93 connecting the wall portion 92 and the cylindrical portion 91. As shown in FIG. 4, the connecting portion 93 connects the end portions on the other side L2 in the axial direction of the cylindrical portion 91 and the wall portion 92. The cylindrical portion 91 is cylindrical. The inner peripheral surface of the wall portion 92 is a cylindrical surface surrounding the outer periphery of the cylindrical portion 91. An annular recess for accommodating components of the gimbal mechanism 7 is formed between the inner peripheral surface of the wall portion 92 and the outer peripheral surface of the cylindrical portion 91.

[0020] As shown in FIGS. 3, 6, and 7, the lens barrel 22 of the camera module 2 is held inside the cylindrical portion 91. The tip of the lens barrel 22 protrudes from the cylindrical portion 91 to one side L1 in the axial direction. The substrate 23 on which the imaging element is mounted is disposed at the end of the lens barrel 22 protruding from the cylindrical portion 91 to the other side L2 in the axial direction.

[0021] As shown in Figures 4 and 5, the outer surface of the wall portion 92 has a shape in which the four diagonal corners of a rectangle are cut out when viewed from the axial direction. The diagonal directions of the wall portion 92 coincide with the first axial direction and the second axial direction. A pair of first recesses 94 are provided at diagonal positions in the first axial direction of the wall portion 92, recessed from the inner surface of the wall portion 92 toward the outer surface. A groove 95 is provided at diagonal positions in the second axial direction of the wall portion 92, penetrating the wall portion 92 in the second axial direction.

[0022] As shown in Figure 5, the outer circumferential surface of the wall portion 92 includes a pair of first coil arrangement portions 96X located on both sides of the cylindrical portion 91 in the Y-axis direction, and a pair of second coil arrangement portions 96Y located on both sides of the cylindrical portion 91 in the X-axis direction. The first coil 82X of the oscillating magnetic drive mechanism 8 is arranged in the first coil arrangement portion 96X. The second coil 82Y of the oscillating magnetic drive mechanism 8 is arranged in the second coil arrangement portion 96Y.

[0023] The cylindrical portion 91 protrudes from the inside of the wall portion 92 to one side L1 in the axial direction. As shown in Figure 4, the cylindrical portion 91 comprises a base portion 911 positioned inside the wall portion 92 and a tip portion 912 that protrudes from the wall portion 92 to one side L1 in the axial direction. Projections 97 extending in the axial direction are formed on the outer circumferential surface of the tip portion 912. The projections 97 are arranged at multiple positions spaced apart in the circumferential direction. In this embodiment, four projections 97 are arranged at equally angular intervals. The cross-sectional shape of the projections 97 is semicircular.

[0024] (case) As shown in Figure 3, the case 5 comprises a body portion 51 surrounding the outer circumference of the movable body 4, and a bottom plate portion 52 extending inward from an intermediate position in the axial direction of the body portion 51. As shown in Figures 6 and 7, the holder 9 is positioned on one axial side L1 of the bottom plate portion 52. On the other axial side L2 of the bottom plate portion 52 are the end of the lens barrel 22 of the camera module 2 and the substrate 23 that protrude from an opening 53 provided in the center of the bottom plate portion 52 to the other axial side L2, and a flexible printed circuit board (not shown) pulled out from the substrate 23.

[0025] When viewed from the axial direction, the body portion 51 has an external shape that is a rectangle with the four diagonal corners cut out. The diagonal directions of the body portion 51 coincide with the first axial direction and the second axial direction. The body portion 51 has a body tip portion 54 that extends from the bottom plate portion 52 to one side L1 in the axial direction, and the holder 9 is positioned inside the body tip portion 54. As shown in Figures 3 and 5, a pair of second recesses 55 are provided at diagonal positions in the first axial direction of the body tip portion 54, recessing from the inner circumferential surface of the body tip portion 54 toward the outer circumference.

[0026] The tip portion 54 of the body includes a pair of first magnet arrangement portions 56X located on both sides of the holder 9 in the Y-axis direction, and a pair of second magnet arrangement portions 56Y located on both sides of the holder 9 in the X-axis direction. The first magnet arrangement portions 56X and the second magnet arrangement portions 56Y are notches cut out from one end L1 in the axial direction of the tip portion 54 to the other end L2 in the axial direction. As shown in Figures 2 and 5, the first magnet 81X of the oscillating magnetic drive mechanism 8 is arranged in the first magnet arrangement portion 56X. The second magnet 81Y of the oscillating magnetic drive mechanism 8 is arranged in the second magnet arrangement portion 56Y.

[0027] (cover) As shown in Figures 1, 2, 6, and 7, the cover 3 comprises an end plate portion 31 that abuts the case 5 from one side L1 in the axial direction, and a side plate portion 32 that extends from the outer peripheral edge of the end plate portion 31 to the other side L2 in the axial direction and surrounds the outer circumference of the tip portion 54 of the body. When the cover 3 is assembled to the case 5, the cylindrical portion 91 of the holder 9 protrudes from an opening 33 provided in the center of the end plate portion 31 to one side L1 in the axial direction. The cover 3 is fixed to the case 5 by the locking holes 34 provided in the side plate portion 32, into which hooks 57 protruding from the outer peripheral surface of the tip portion 54 of the body are locked.

[0028] (Magnetic drive mechanism for oscillation) As shown in Figure 5, the oscillating magnetic drive mechanism 8 comprises a first magnet 81X and a second magnet 81Y arranged on the support body 6, and a first coil 82X and a second coil 82Y fixed to the movable body 4. It is also possible to arrange the first coil 82X and the second coil 82Y on the movable body 4 and the first magnet 81X and the second magnet 81Y on the support body 6.

[0029] The first magnet 81X and the second magnet 81Y are fixed to the inner circumferential surface of the side plate portion 32 of the cover 3. As described above, the front end portion 54 of the body of the case 5 is provided with a pair of first magnet arrangement portions 56X and a pair of second magnet arrangement portions 56Y that open to one side L1 in the axial direction. Therefore, by placing the cover 3, to which the first magnet 81X and the second magnet 81Y are fixed, over the case 5 from one side L1 in the axial direction, the first magnet 81X is arranged in the pair of first magnet arrangement portions 56X, and the second magnet 81Y is arranged in the pair of second magnet arrangement portions 56Y. The cover 3 is made of magnetic metal. Therefore, the side plate portion 32 of the cover 3 functions as a yoke.

[0030] Figure 8 is a perspective view showing the first magnet 81X and the second magnet 81Y positioned by the second stopper member 12 and fixed to the cover 3. In this embodiment, the second stopper member 12 is fixed to the inside of the cover 3. As a result, when fixing the first magnet 81X and the second magnet 81Y to the cover 3, the second stopper member 12 positions the first magnet 81X and the second magnet 81Y. As shown in Figures 3 and 8, the second stopper member 12 is provided with two magnet positioning parts 13X for holding the first magnet 81X and two magnet positioning parts 13Y for holding the second magnet 81Y.

[0031] As shown in Figure 8, when the second stopper member 12 is fitted inside the cover 3, the magnet positioning portion 13X is positioned on the inner surfaces of the side plate portion 32 in the Y1 and Y2 directions, and the magnet positioning portion 13Y is positioned on the inner surfaces of the side plate portion 32 in the X1 and X2 directions. The magnet positioning portions 13X and 13Y each include a pair of horizontal frame portions 131 that extend axially along the edges on both sides in the width direction of each magnet, and an upper frame portion 132 that connects the ends of the pair of horizontal frame portions 131 on one side L1 in the axial direction. The first magnet 81X and the second magnet 81Y are fitted into recesses formed by the pair of horizontal frame portions 131 and the upper frame portion 132, respectively.

[0032] As shown in Figures 2 and 3, the first magnet placement section 56X and the second magnet placement section 56Y of case 5 each have recesses formed on their inner surfaces in the width direction, shaped to accommodate the horizontal frame section 131. Therefore, the first magnet 81X fits into the first magnet placement section 56X together with the horizontal frame section 131, and the second magnet 81Y fits into the second magnet placement section 56Y together with the horizontal frame section 131.

[0033] The first coil 82X and the second coil 82Y are fixed to the outer circumferential surface of the wall portion 92 of the holder 9. As described above, the wall portion 92 includes a pair of first coil arrangement portions 96X and a pair of second coil arrangement portions 96Y. As shown in Figures 3 and 5, a flexible printed circuit board 83 is routed along the outer circumferential surface of the wall portion 92. The first coil 82X is fixed to the first coil arrangement portion 96X via the flexible printed circuit board 83. The second coil 82Y is fixed to the second coil arrangement portion 96Y via the flexible printed circuit board 83. The first coil 82X and the second coil 82Y are electrically connected to the flexible printed circuit board 83 and powered via the flexible printed circuit board 83.

[0034] As shown in Figure 5, the oscillation magnetic drive mechanism 8 comprises two sets of first magnets 81X and first coils 82X facing each other in the Y-axis direction, and two sets of second magnets 81Y and second coils 82Y facing each other in the X-axis direction. The sets of first magnets 81X and first coils 82X generate a magnetic driving force that causes the movable body 4 to oscillate around the X-axis. The sets of second magnets 81Y and second coils 82Y generate a magnetic driving force that causes the movable body 4 to oscillate around the Y-axis.

[0035] As shown in Figure 4, a magnetic sensor 84 is connected to the flexible printed circuit board 83, which is positioned inside the first coil 82X and the second coil 82Y. A magnetic member 85 for returning to the home position is also fixed to the flexible printed circuit board 83. The oscillating magnetic drive mechanism 8 detects the angular position of the movable body 4 based on the output of the magnetic sensor 84. When power is stopped to the first coil 82X and the second coil 82Y, the movable body 4 returns to the home position due to the magnetic attraction force of the first magnet 81X and the second magnet 81Y attracting the magnetic member 85.

[0036] (Gimbal mechanism) As shown in Figures 4 and 5, the gimbal mechanism 7 comprises a gimbal frame 70, a pair of first oscillating support parts 71 that make point contact with the gimbal frame 70 on a first axis R1, and a pair of second oscillating support parts 72 that make point contact with the gimbal frame 70 on a second axis R2. As shown in Figures 3 and 5, the pair of first oscillating support parts 71 are arranged on the movable body 4. In this embodiment, the pair of first oscillating support parts 71 are arranged in the first recess 94 of the holder 9. The pair of second oscillating support parts 72 are arranged on the support body 6. In this embodiment, the pair of second oscillating support parts 72 are arranged in the second recess 55 of the case 5.

[0037] As shown in Figure 4, the gimbal frame 70 comprises a rigid gimbal frame body 73 and four shafts 74 protruding from both ends of the gimbal frame body 73 in the first axial direction and from both ends of the gimbal frame body 73 in the second axial direction. Each of the four shafts 74 is provided with a hemispherical convex curved surface 75. A pair of first oscillating support parts 71 and a pair of second oscillating support parts 72 each have a concave curved surface 76 that is recessed toward the outer circumference. The concave curved surface 76 makes point contact with the convex curved surface 75 of the gimbal frame 70.

[0038] The gimbal frame body 73 comprises an annular frame portion 77, a pair of first arm portions 78 protruding from the frame portion 77 on both sides in the first axial direction, and a pair of second arm portions 79 protruding from the frame portion 77 on both sides in the second axial direction. The shaft 74 is fixed to mounting holes opening on the tip surfaces of the first arm portions 78 and the tip surfaces of the second arm portions 79. The frame portion 77 is positioned in an annular recess provided between the cylindrical portion 91 and the wall portion 92 of the holder 9. As shown in Figure 5, the pair of first arm portions 78 extend toward a first recess 94 provided at diagonal positions in the first axial direction of the wall portion 92. The pair of second arm portions 79 are positioned in groove portions 95 provided at diagonal positions in the second axial direction of the wall portion 92. The tips of the pair of second arms 79 protrude from the groove 95 toward the outer circumference of the wall 92 and extend toward a pair of second recesses 55 provided at diagonal positions in the second axial direction on the body 51 of the case 5.

[0039] Figure 9 is an exploded perspective view of the contact member 700 and the spring member 710. A pair of first oscillating support parts 71 and a pair of second oscillating support parts 72 each include a contact member 700 provided with a concave curved surface 76 and a spring member 710 that biases the contact member 700 toward the gimbal frame 70. The contact member 700 is manufactured by deep drawing of a metal plate. The spring member 710 is a leaf spring made by bending a metal plate into a U-shape. The plate thickness of the contact member 700 is greater than the plate thickness of the spring member 710. For example, in this embodiment, the plate thickness of the spring member 710 is 0.2 mm and the plate thickness of the contact member 700 is 0.3 mm.

[0040] As shown in Figures 6, 7, and 9, the contact member 700 comprises a circular bottom portion 701 facing the tip of the shaft 74 of the gimbal frame 70, and a cylindrical portion 702 extending from the outer peripheral edge of the bottom portion 701 toward the gimbal frame 70. A recess 703 into which the tip of the shaft 74 is inserted is provided in the center of the bottom portion 701, and a concave curved surface 76 is provided on the inner surface of the recess 703. When the center of the bottom portion 701 in which the recess 703 is formed is viewed from the back side of the recess 703, a protrusion 704 is provided that projects toward the opposite side from the cylindrical portion 702.

[0041] The spring member 710 has a plate portion 711 extending in the axial direction, and a portion extending parallel to the plate portion 711 The device includes a receiving portion 712 and a bent portion 713 that connects the plate portion 711 and the receiving portion 712. The receiving portion 712 is provided with a hole 714 that is smaller than the bottom portion 701 of the contact member 700 and larger than the protrusion 704.

[0042] As shown in Figures 5, 6, and 7, a spring member 710 with a receiving portion 712 facing inward is placed in the first recess 94 of the holder 9 and the second recess 55 of the case 5, and a contact member 700 is placed on the inner circumference side of the spring member 710. The spring member 710 is fixed to the first recess 94 or the second recess 55 with an adhesive (not shown). The contact member 700 and the spring member 710 are assembled so that the bottom portion 701 of the contact member 700 contacts the receiving portion 712 of the spring member 710 from the inner circumference side, and the convex portion 704 of the contact member 700 is inserted into the hole 714 of the receiving portion 712. Adhesive G is injected between the plate portion 711 of the spring member 710 and the convex portion 704 of the contact member 700.

[0043] The tip of the shaft 74 protruding from the tip of the first arm portion 78 of the gimbal frame 70 is inserted into the recess 703 of the contact member 700 located in the first recess 94. The contact member 700 is biased toward the inner circumference via the receiving portion 712. Therefore, the biasing force of the spring member 710 maintains a state in which the concave surface 76 of the contact member 700 makes point contact with the convex curved surfaces 75 provided at both ends of the gimbal frame 70 in the first axial direction, from the outer circumference side. As a result, the holder 9 is supported by the gimbal frame 70 so that it can swing around the first axis R1.

[0044] Similarly, the tip of the shaft 74 protruding from the tip of the second arm portion 79 of the gimbal frame 70 is inserted into the recess 703 of the contact member 700 located in the second recess 55. The contact member 700 is biased toward the inner circumference via the receiving portion 712. Therefore, the biasing force of the spring member 710 maintains a state in which the concave surface 76 of the contact member 700 makes point contact with the convex curved surfaces 75 provided at both ends of the gimbal frame 70 in the second axial direction, from the outer circumference side. As a result, the gimbal frame 70 is supported by the case 5 so that it can swing around the second axis R2.

[0045] As shown in Figures 6 and 7, the tips of the first arm 78 and the second arm 79 of the gimbal frame 70 are inserted into the inside of the cylindrical portion 702 of the contact member 700. Furthermore, the depth of the recess 703 into which the tip of the shaft 74 is inserted is greater than the depth of the hemispherical concave surface 76. Therefore, even if the receiving portion 712 of the spring member 710 bends toward the plate portion 711 when subjected to a strong impact such as a fall, there is little risk of the tip of the shaft 74 coming out of the recess 703, and there is little risk of the tips of the first arm 78 and the second arm 79 coming out of the inside of the cylindrical portion 702.

[0046] (First stopper member) As shown in Figure 4, the first stopper member 11 comprises an annular portion 14 and a pair of protrusions 15 projecting from the annular portion 14 on both sides in the first axial direction. In this embodiment, the first stopper member 11 is plate-shaped. Multiple semicircular notches 16 are provided at various positions on the inner periphery of the annular portion 14. In this embodiment, four notches 16 are provided at equally angular intervals. As shown in Figures 3, 6, and 7, the first stopper member 11 is mounted on the outer circumference of the cylindrical portion 91 of the holder 9. The first stopper member 11 is located on the opposite side of the gimbal frame 70 from the connection portion 93 of the holder 9 in the axial direction. The first stopper member 11 also overlaps the first swing support portion 71 from one side L1 in the axial direction.

[0047] Figure 10 is an exploded perspective view showing the state in which the notch 16 of the first stopper member 11 and the projection 97 provided on the cylindrical portion 91 of the holder 9 are aligned at an angle. Figure 11 is a perspective view showing the state in which the first stopper member 11 is fitted into the holder 9, and is a perspective view showing the state before the first stopper member 11 is locked by the projection 97. Figure 12 is a perspective view showing the state in which the first stopper member 11 is locked by the projection 97. Hereafter, referring to Figures 10, 11, and 12, 1. The assembly method for the stopper member 11 will be explained.

[0048] As shown in Figure 10, the number and arrangement of the notches 16 provided on the inner periphery of the first stopper member 11 coincide with the number and arrangement of the protrusions 97 provided on the outer circumferential surface of the cylindrical portion 91. When fixing the first stopper member 11 to the holder 9, first, as shown in Figure 10, the notch 16 and the projection 97 are aligned at an angle and the cylindrical portion 91 is passed inside the annular portion 14. Then, as shown in Figure 11, the projection 15 of the first stopper member 11 is abutted against the tip surface of the wall portion 92.

[0049] As shown in Figure 10, the tip surface of the wall portion 92 is provided with a stepped portion 98 that is recessed on the other side L2 in the axial direction, at a position adjacent to the first recess 94 in the circumferential direction. As shown in Figure 11, when the angular positions of the notch portion 16 and the projection 97 are aligned, the angular position of the protruding portion 15 of the first stopper member 11 is offset from the angular position of the first recess 94, and the protruding portion 15 abuts against the stepped portion 98 from one side L1 in the axial direction.

[0050] As shown in Figures 10 and 11, the stepped portion 98 is provided on both sides of the first recess 94 in the circumferential direction. In Figures 10 and 11, the projection 15 abuts against the stepped portion 98 located on one side of the first recess 94 in the circumferential direction. If the first stopper member 11 is assembled upside down from the state shown in Figures 10 and 11, the projection 15 abuts against the stepped portion 98 located on the other side of the first recess 94 in the circumferential direction. Therefore, the first stopper member 11 can be assembled into the holder 9 without determining which side is up or down.

[0051] As shown in Figure 11, when the projection 15 abuts against the stepped portion 98, the projection 97 passes through the notch 16. Therefore, the first stopper member 11 is rotated circumferentially in the direction indicated by arrow C in Figure 12 to align the angular position of the projection 15 with the angular position of the first recess 94. As a result, the angular position of the notch 16 is shifted from the angular position of the projection 97, so the projection 97 overlaps the inner circumferential edge of the annular portion 14 from one side L1 in the axial direction. Consequently, the first stopper member 11 is locked by the projection 97 in the position shown in Figure 12, and its movement to one side L1 in the axial direction is restricted.

[0052] As shown in Figures 6 and 7, the annular portion 14 of the first stopper member 11 overlaps the frame portion 77 of the gimbal frame 70 from one side L1 in the axial direction. Therefore, as shown in Figures 6, 7, and 12, if the first stopper member 11 is locked by the projection 97, the frame portion 77 of the gimbal frame 70 is prevented from protruding from between the cylindrical portion 91 and the wall portion 92 on one side L1 in the axial direction.

[0053] The first stopper member 11 includes a first stopper portion S1 that overlaps the first swing support portion 71, which is located in the first recess 94 of the holder 9, from one side L1 in the axial direction. In this embodiment, the tip of the projection 15 functions as the first stopper portion S1. As shown in Figure 6, the tip of the projection 15 (first stopper portion S1) extends to a position where it overlaps the first swing support portion 71, which is located in the first recess 94, from one side L1 in the axial direction. As described above, since the first stopper member 11 is locked by the projection 97, the first stopper portion S1 restricts deformation of the components constituting the first swing support portion 71 and prevents the components constituting the first swing support portion 71 from falling out of the first recess 94.

[0054] As shown in Figure 6, the first recess 94 includes a first support portion 99 that supports the first swing support portion 71 from the other side L2 in the axial direction. The first stopper portion S1 faces the first support portion 99 from one side L1 in the axial direction. The first stopper portion S1 holds the first swing support portion 71 by sandwiching it between itself and the first support portion 99. In this embodiment, the first support portion 99 is the bottom surface of the first recess 94. The first support portion 99 supports the cylindrical portion 702 of the contact member 700 of the first swing support portion 71 along its axis. It is supported from the other side L2 in the direction. The first stopper portion S1 holds the cylindrical portion 702 between itself and the first support portion 99.

[0055] (Second stopper member) As shown in Figure 3, the second stopper member 12 comprises a pair of magnet positioning sections 13X facing each other in the Y direction, a pair of magnet positioning sections 13Y facing each other in the X direction, and four connecting sections 17 that connect adjacent magnet positioning sections 13X and 13Y in the circumferential direction. The connecting sections 17 extend in directions inclined at 45 degrees with respect to the X-axis and Y-axis directions. The upper frame sections 132 of the magnet positioning sections 13X and 13Y and the connecting sections 17 are connected in an octagonal frame shape when viewed from the axial direction.

[0056] As shown in Figure 2, the connecting portion 17 of the second stopper member 12 abuts against the tip surface of the body tip 54 from one side in the axial direction. As shown in Figure 3, stepped portions are provided on the tip surface of the body tip 54 at diagonal positions in the first axial direction and diagonal positions in the second axial direction, into which the connecting portion 17 fits. At the diagonal positions in the second axial direction of the body tip 54, stepped portions are provided on both sides in the circumferential direction of the second recess 55 into which the connecting portion 17, which extends in a direction intersecting the second axial direction, fits. As described above, the second stopper member 12 is positioned on the inner surface of the cover 3 and sandwiched between the tip surface of the body tip 54 and the cover 3.

[0057] The second stopper member 12 includes a second stopper portion S2 that overlaps the second swing support portion 72, which is located in the second recess 55 of the case 5, from one side L1 in the axial direction. In this embodiment, two connecting portions 17 located at diagonal positions in the second axial direction function as the second stopper portion S2. As shown in Figure 3, the connecting portion 17 (second stopper portion S2) located in the second axial direction includes a protruding portion 18 that protrudes to the other side L2 in the axial direction. As shown in Figure 7, the second stopper portion S2 overlaps the second swing support portion 72, which is located in the second recess 55, from one side L1 in the axial direction. The second stopper portion S2 is prevented from coming off the case 5 by the cover 3. Therefore, deformation of the components constituting the second stopper portion S2 and the second swing support portion 72 is restricted, and the components constituting the second swing support portion 72 are prevented from falling out of the second recess 55.

[0058] As shown in Figure 7, the second recess 55 includes a second support portion 59 that supports the second swing support portion 72 from the other side L2 in the axial direction. The second stopper portion S2 faces the second support portion 59 from one side L1 in the axial direction. The second stopper portion S2 holds the second swing support portion 72 by sandwiching it between itself and the second support portion 59. In this embodiment, the second support portion 59 is the bottom surface of the second recess 55. The second support portion 59 supports the cylindrical portion 702 of the contact member 700 of the second swing support portion 72 from the other side L2 in the axial direction. The second stopper portion S2 holds the cylindrical portion 702 by sandwiching it between itself and the second support portion 59.

[0059] (Effects and Benefits) As described above, the shake correction unit 1 of this embodiment includes a movable body 4 and a support body 6, and a gimbal mechanism 7 that connects the movable body 4 and the support body 6 and supports the movable body 4 so that it can swing relative to the support body 6. The gimbal mechanism 7 includes a gimbal frame 70, a pair of first swing support parts 71 that make point contact with the gimbal frame 70 on a first axis R1, and a pair of second swing support parts 72 that make point contact with the gimbal frame 70 on a second axis R2. The movable body 4 includes a pair of first support parts 99 that support the pair of first swing support parts 71. The support body 6 includes a pair of second support parts 59 that support the pair of second swing support parts 72. Furthermore, it includes a pair of first stopper parts S1 that face the pair of first support parts 99 in the axial direction along the central axis L, and a pair of second stopper parts S2 that face the pair of second support parts 59 in the axial direction. The first stopper portion S1 holds the first swinging support portion 71 between itself and the first support portion 99, and the second stopper portion S2 holds the second swinging support portion 72 between itself and the second support portion 59.

[0060] In this embodiment, the first swing support part 71 and the second swing support part 7 of the gimbal mechanism are as shown above. Part 2 is held between the stopper part and the support part, which are opposite each other in the axial direction. Therefore, even if a strong impact is applied due to a fall or the like, the parts constituting the first swing support part 71 and the second swing support part 72 are prevented from falling off and deforming. This prevents the movable body 4 from coming off the gimbal frame 70, and prevents the gimbal frame 70 from coming off the second swing support part 72. Thus, the risk of the movable body 4 falling off can be reduced.

[0061] In this embodiment, both a pair of first stopper parts S1 and a pair of second stopper parts S2 are provided, but a configuration with only one of the pair of first stopper parts S1 and the pair of second stopper parts S2 is also possible. If at least one of the first stopper parts S1 and the second stopper parts S2 is provided, the movable body 4 will not detach from the gimbal frame 70, or the gimbal frame 70 will not detach from the second swing support part 72. Therefore, the risk of the movable body 4 falling off can be reduced.

[0062] The movable body 4 in this embodiment includes a holder 9 that holds the camera module 2, which is the object to be oscillated, and a first stopper member 11 that is separate from the holder 9. The holder 9 is provided with a pair of first support parts 99, and the first stopper member 11 is provided with a pair of first stopper parts S1. In this way, if the first stopper member 11 is separate from the holder 9, the components constituting the first oscillating support part 71 and the first stopper member 11 can be assembled to the holder 9 from the same direction, thereby clamping the components constituting the first oscillating support part 71 in the axial direction. Therefore, the assembly work is easy in which the detachment and deformation of the first oscillating support part 71 is restricted.

[0063] The support 6 in this embodiment comprises a case 5 surrounding the outer circumference of the movable body 4, and a second stopper member 12 separate from the case 5. The case 5 is provided with a pair of second support portions 59, and the second stopper member 12 is provided with a pair of second stopper portions S2. In this way, if the second stopper member 12 is separate from the case 5, the components constituting the second swing support portion 72 and the second stopper member 12 can be clamped in the axial direction by assembling them to the case 5 from the same direction. Therefore, the assembly process is easy in which the detachment and deformation of the second swing support portion 72 are restricted.

[0064] The first stopper portion S1 may be provided on the holder 9. Even if the first support portion 99 and the first stopper portion S1 are provided on the same member, it is possible to realize a configuration in which the first swing support portion 71 is held between the first support portion 99 and the first stopper portion S1 which are facing each other in the axial direction. Similarly, the second stopper portion S2 may be provided on the case 5. Even if the second support portion 59 and the second stopper portion S2 are provided on the same member, it is possible to realize a configuration in which the second swing support portion 72 is held between the second support portion 59 and the second stopper portion S2 which are facing each other in the axial direction.

[0065] In this embodiment, the support body 6 includes a cover 3 fixed to the axial end of the case 5, and the cover 3 positions the second stopper portion S2 in the axial direction. This prevents the second stopper member 12 from coming off the case 5 due to impact.

[0066] The gimbal frame 70 in this embodiment has four convex curved surfaces 75 that protrude on both sides in the first axial direction along the first axis R1 and on both sides in the second axial direction along the second axis R2. Each of the pair of first oscillating support parts 71 and each of the pair of second oscillating support parts 72 includes a contact member 700 having a concave curved surface 76 that makes point contact with the convex curved surface 75, and a spring member 710 that biases the concave curved surface 76 toward the convex curved surface 75. The plate thickness of the contact member 700 is greater than the plate thickness of the spring member 710. In this way, by making the spring member 710 and the contact member 700 into separate parts, the plate thickness can be made thinner in parts where elasticity is needed to apply the required biasing force, and the plate thickness can be increased in parts where it is desirable to restrict deformation to increase rigidity.

[0067] In this embodiment, the first stopper portion S1 holds the contact member 700 between itself and the first support portion 99. The second stopper portion S2 holds the contact member 700 between itself and the second support portion 59. By holding the contact member 700, which has a concave curved surface 76, from both sides in the axial direction in this way, deformation and detachment of the contact member 700 can be restricted. This makes it possible to maintain a state in which the convex curved surface 75 is in point contact with the concave curved surface 76.

[0068] The gimbal frame 70 in this embodiment comprises a gimbal frame body 73 and four shafts 74 protruding from both ends of the gimbal frame body 73 in the first axial direction and from both ends of the gimbal frame body 73 in the second axial direction. Each of the four shafts 74 is provided with a convex curved surface 75 at its tip. The contact member 700 comprises a bottom portion 701 with a recess 703 into which the tips of the shafts 74 are inserted, and a cylindrical portion 702 extending from the outer peripheral edge of the bottom portion 701 toward the gimbal frame body 73, with a convex curved surface 75 provided on the inner surface of the recess 703. The first stopper portion S1 holds the cylindrical portion 702 between itself and the first support portion 99, and the second stopper portion S2 holds the cylindrical portion 702 between itself and the second support portion 59. By holding the cylindrical portion 702 by clamping it in the axial direction in this way, the deformation of the cylindrical portion 702 can be restricted. Furthermore, even if the tip of the shaft 74 comes out of the recess 703, the cylindrical portion 702 can prevent the shaft 74 from coming out of the contact member 700. Therefore, there is little risk of the gimbal frame 70 coming out of the contact member 700.

[0069] In this embodiment, the contact member 700 has a projection 704 on the back side of the recess 703 that protrudes toward the spring member 710. The spring member 710 has a receiving portion 712 with a hole 714 into which the projection 704 fits, and biases the concave curved surface 76 toward the convex curved surface 75 via the receiving portion 712. In this way, the contact member 700 is held in place so as not to come off the receiving portion 712, while the concave curved surface 76 can be biased toward the convex curved surface 75 via the receiving portion 712.

[0070] In this embodiment, the oscillating magnetic drive mechanism 8 includes a first magnet 81X and a second magnet 81Y arranged on the support 6, and a first coil 82X and a second coil 82Y arranged on the movable body 4 and facing the first magnet 81X and the second magnet 81Y. The second stopper member 12 includes a magnet positioning part 13X for positioning the first magnet 81X and a magnet positioning part 13Y for positioning the second magnet 81Y. Therefore, the positional accuracy of the first magnet 81X and the second magnet 81Y can be improved, and the ease of assembly can be enhanced.

[0071] The holder 9 in this embodiment comprises a cylindrical portion 91 extending in the axial direction, a wall portion 92 surrounding the outer circumference of the cylindrical portion 91, and a connecting portion 93 connecting the cylindrical portion 91 and the wall portion 92, with the first swing support portion 71 positioned on the wall portion 92. The gimbal frame 70 comprises a frame portion 77 housed between the cylindrical portion 91 and the wall portion 92, a pair of first arm portions 78 protruding from the frame portion 77 to both sides in the first axial direction, and a pair of second arm portions 79 protruding from the frame portion 77 to both sides in the second axial direction. The pair of first arm portions 78 extend to the first swing support portion 71, and the pair of second arm portions 79 extend to the outside of the wall portion 92. The first stopper member 11 comprises an annular portion 14 positioned axially opposite to the frame portion 77 and the connecting portion 93, surrounding the outer circumference of the cylindrical portion 91, and a pair of protruding portions 15 protruding from the annular portion 14 to both sides in the first axial direction. A first stopper portion S1 is provided at the tip of the protruding portion 15. This allows the first stopper member 11 to prevent the gimbal frame 70 from falling out of the holder 9.

[0072] In this embodiment, the cylindrical portion 91 of the holder 9 comprises a base portion 911 positioned inside the wall portion 92 and a tip portion 912 projecting axially from inside the wall portion 92. A projection 97 is provided on the outer circumferential surface of the tip portion 912, and a notch 16 is provided on the inner circumferential edge of the annular portion 14 through which the projection 97 can pass. When the angular positions of the pair of projections 15 and the angular positions of the pair of first swing support portions 71 are aligned, the angular position of the notch 16 and the angular position of the projection 97 are misaligned, and the inner circumferential edge of the annular portion 14 and the projection 97 overlap when viewed from the axial direction. Thus, in this embodiment, the tip of the projection 15 functions as the first stopper portion S1, and the first stopper member 11 When the angular position is aligned, the projection 97 locks the first stopper member 11. Therefore, the state in which the first swing support part 71 is held by being clamped in the axial direction can be maintained.

[0073] (summary) The present invention can take the following forms. (1) It comprises a movable body and a support, and a gimbal mechanism that connects the movable body and the support and supports the movable body so that it can swing relative to the support, When the axis passing through the pivot center of the movable body and the axis intersecting the pivot center are defined as the first axis, and the axis intersecting the central axis and the first axis at the pivot center are defined as the second axis, The gimbal mechanism comprises a gimbal frame, a pair of first oscillating support parts that make point contact with the gimbal frame on the first axis, and a pair of second oscillating support parts that make point contact with the gimbal frame on the second axis. The movable body comprises a pair of first support parts that support the pair of first swing support parts, The support comprises a pair of second support parts that support the pair of second swing support parts, Furthermore, it comprises a pair of first stopper portions facing the pair of first support portions in the axial direction along the central axis, and at least one of a pair of second stopper portions facing the pair of second support portions in the axial direction, The first stopper portion holds the first swing support portion between itself and the first support portion. The second stopper portion is characterized by holding the second swing support portion between itself and the second support portion, thus providing a vibration correction function to the unit.

[0074] (2) The movable body comprises a holder for holding the object to be swung, and a first stopper member separate from the holder. The holder is provided with the pair of first support parts, The unit with vibration correction function according to (1) above, characterized in that the first stopper member is provided with the pair of first stopper portions.

[0075] (3) The support comprises a case surrounding the outer circumference of the movable body and a second stopper member separate from the case. The case is provided with the pair of second support parts, The vibration correction unit according to (1) or (2) above, characterized in that the pair of second stopper portions are provided on the second stopper member.

[0076] (4) The support comprises a cover fixed to the axial end of the case, The cover is characterized in that it positions the second stopper portion in the axial direction, and is a unit with a runout correction function as described in (3) above.

[0077] (5) The gimbal frame has four convex curved surfaces that protrude from both sides in the first axial direction along the first axis and from both sides in the second axial direction along the second axis. Each of the pair of first swing support parts and each of the pair of second swing support parts comprises a contact member having a concave surface that makes point contact with the convex surface, and a spring member that biases the concave surface toward the convex surface. The vibration correction unit according to any one of (1) to (4) above, characterized in that the plate thickness of the contact member is greater than the plate thickness of the spring member.

[0078] (6) The first stopper portion and the second stopper portion are provided, The first stopper portion holds the contact member between itself and the first support portion. The unit with vibration correction function according to (5) above, characterized in that the second stopper portion holds the contact member between itself and the second support portion.

[0079] (7) The gimbal frame comprises a gimbal frame body and four shafts protruding from both ends of the gimbal frame body in the first axial direction and from both ends of the gimbal frame body in the second axial direction, and each of the four shafts is provided with the convex curved surface at its tip. The contact member comprises a bottom portion having a recess into which the tip of the shaft is inserted, and a cylindrical portion extending from the outer peripheral edge of the bottom portion toward the gimbal frame body, wherein the convex curved surface is provided on the inner surface of the recess. The first stopper portion holds the cylindrical portion between itself and the first support portion, The vibration correction unit according to (5) or (6) above, characterized in that the second stopper portion holds the cylindrical portion between itself and the second support portion.

[0080] (8) The contact member has a protrusion on the back side of the recess that protrudes toward the spring member. The spring member comprises a receiving portion having a hole into which the protrusion fits, and the unit with a vibration correction function according to (7) above is characterized in that the concave curved surface is biased toward the convex curved surface via the receiving portion.

[0081] (9) The rocking magnetic drive mechanism comprises a magnet disposed on the support and a coil disposed on the movable body and facing the magnet. The vibration correction unit according to (3) or (4) above, characterized in that the second stopper member includes a magnet positioning section for positioning the magnet.

[0082] (10) The holder comprises a cylindrical portion extending in the axial direction, a wall portion surrounding the outer circumference of the cylindrical portion, and a connecting portion connecting the cylindrical portion and the wall portion, wherein the first swing support portion is disposed on the wall portion. The gimbal frame comprises a frame portion housed between the cylindrical portion and the wall portion, a pair of first arms protruding from the frame portion to both sides in the first axial direction, and a pair of second arms protruding from the frame portion to both sides in the second axial direction. The pair of first arms extend to the first swing support, and the pair of second arms extend to the outside of the wall. The first stopper member comprises an annular portion that surrounds the outer circumference of the cylindrical portion and is positioned on the opposite side of the frame portion from the connecting portion in the axial direction, and a pair of protrusions that project from the annular portion to both sides in the first axial direction. The vibration correction unit according to (2) above, characterized in that the first stopper portion is provided at the tip of the protruding portion.

[0083] (11) The cylindrical portion comprises a base portion disposed inside the wall portion and a tip portion protruding from the inside of the wall portion in the axial direction. A projection is provided on the outer surface of the tip portion. A notch is provided on the inner periphery of the annular portion through which the projection can pass. The vibration correction unit according to (10) above, characterized in that when the angular positions of the pair of protrusions and the angular positions of the pair of first rocking support parts are aligned, the angular position of the notch and the angular position of the projection are misaligned, and the inner periphery of the annular part and the projection overlap when viewed from the axial direction. [Explanation of Symbols]

[0084] 1... Unit with image stabilization function, 2... Camera module, 3... Cover, 4... Movable body, 5... Case, 6... Support, 7... Gimbal mechanism, 8... Magnetic drive mechanism for oscillation, 9... Holder, 11... First stopper member, 12... Second stopper member, 13X, 13Y... Magnetic positioning part, 14... Annular part, 15... Protruding part, 16... Notch part, 17... Connecting part, 18... Protruding part, 21... Lens, 22... Lens barrel, 23... Substrate, 31... 32...End plate section, 33...Side plate section, 34...Opening, 51...Body section, 52...Bottom plate section, 53...Opening, 54...Tip of body section, 55...Second recess, 56X...First magnet placement section, 56Y...Second magnet placement section, 57...Hook, 59...Second support section, 70...Gimbal frame, 71...First oscillating support section, 72...Second oscillating support section, 73...Gimbal frame body, 74...Shaft, 75...Convex curved surface, 76...Concave curved surface, 77...Frame section , 78...First arm section, 79...Second arm section, 81X...First magnet, 81Y...Second magnet, 82X...First coil, 82Y...Second coil, 83...Flexible printed circuit board, 84...Magnetic sensor, 85...Magnetic member, 91...Cylindrical section, 92...Wall section, 93...Connection section, 94...First recess, 95...Groove section, 96X...First coil placement section, 96Y...Second coil placement section, 97...Protrusion, 98...Step section, 99...First support section, 131...Horizontal frame section, 132...Upper frame section, 700...Contact member, 701...Bottom section, 702...Cylinder section, 703...Recessed section, 704...Convex section, 710...Spring member, 711...Plate section, 712...Receiving section, 713...Bending section, 714...Hole, 911...Base section, 912...Tip section, G...Adhesive, L...Central axis, L1...One side in the axial direction, L2...Other side in the axial direction, P...Swing center, R1...First axis, R2...Second axis, S1...First stopper section, S2...Second stopper section

Claims

1. It comprises a movable body and a support, and a gimbal mechanism that connects the movable body and the support and supports the movable body so that it can swing relative to the support, When the axis passing through the pivot center of the movable body and the axis intersecting the pivot center are defined as the first axis, and the axis intersecting the central axis and the first axis at the pivot center are defined as the second axis, The gimbal mechanism comprises a gimbal frame, a pair of first oscillating support parts that make point contact with the gimbal frame on the first axis, and a pair of second oscillating support parts that make point contact with the gimbal frame on the second axis. The movable body comprises a pair of first support parts that support the pair of first swing support parts, The support comprises a pair of second support parts that support the pair of second swing support parts, Furthermore, it comprises a pair of first stopper portions facing the pair of first support portions in the axial direction along the central axis, and at least one of a pair of second stopper portions facing the pair of second support portions in the axial direction, The first stopper portion holds the first swing support portion between itself and the first support portion. The second stopper portion is characterized by holding the second swing support portion between itself and the second support portion, thus providing a vibration correction function to the unit.

2. The movable body comprises a holder for holding the object to be swung, and a first stopper member separate from the holder. The holder is provided with the pair of first support parts. The unit with vibration correction function according to claim 1, characterized in that the first stopper member is provided with the pair of first stopper portions.

3. The support comprises a case surrounding the outer circumference of the movable body and a second stopper member separate from the case. The case is provided with the pair of second support parts, The unit with vibration correction function according to claim 1, characterized in that the pair of second stopper portions are provided on the second stopper member.

4. The support comprises a cover fixed to the axial end of the case, The unit with runout correction function according to claim 3, characterized in that the cover positions the second stopper portion in the axial direction.

5. The gimbal frame has four convex curved surfaces that protrude from both sides in the first axial direction along the first axis and from both sides in the second axial direction along the second axis. Each of the pair of first swing support parts and each of the pair of second swing support parts comprises a contact member having a concave surface that makes point contact with the convex surface, and a spring member that biases the concave surface toward the convex surface. The unit with runout correction function according to claim 1, characterized in that the plate thickness of the contact member is greater than the plate thickness of the spring member.

6. The first stopper portion and the second stopper portion are provided, The first stopper portion holds the contact member between itself and the first support portion. The unit with vibration correction function according to claim 5, characterized in that the second stopper portion holds the contact member between itself and the second support portion.

7. The gimbal frame comprises a gimbal frame body and four shafts protruding from both ends of the gimbal frame body in the first axial direction and from both ends of the gimbal frame body in the second axial direction, with each of the four shafts having the convex curved surface at its tip. and The contact member comprises a bottom portion having a recess into which the tip of the shaft is inserted, and a cylindrical portion extending from the outer peripheral edge of the bottom portion toward the gimbal frame body, wherein the convex curved surface is provided on the inner surface of the recess. The first stopper portion holds the cylindrical portion between itself and the first support portion. The vibration correction unit according to claim 6, characterized in that the second stopper portion holds the cylindrical portion between itself and the second support portion.

8. The contact member has a protrusion on the back side of the recess that protrudes toward the spring member. The spring member comprises a receiving portion having a hole into which the protrusion fits, and biases the concave curved surface toward the convex curved surface via the receiving portion, as described in claim 7, for the vibration correction unit.

9. The rocking magnetic drive mechanism comprises a magnet disposed on the support and a coil disposed on the movable body and facing the magnet. The unit with vibration correction function according to claim 3, characterized in that the second stopper member includes a magnet positioning section for positioning the magnet.

10. The holder comprises a cylindrical portion extending in the axial direction, a wall portion surrounding the outer circumference of the cylindrical portion, and a connecting portion connecting the cylindrical portion and the wall portion, wherein the first swing support portion is disposed on the wall portion. The gimbal frame comprises a frame portion housed between the cylindrical portion and the wall portion, a pair of first arms protruding from the frame portion to both sides in the first axial direction, and a pair of second arms protruding from the frame portion to both sides in the second axial direction. The pair of first arms extend to the first swing support, and the pair of second arms extend to the outside of the wall. The first stopper member comprises an annular portion that surrounds the outer circumference of the cylindrical portion and is positioned on the opposite side of the frame portion from the connecting portion in the axial direction, and a pair of protrusions that project from the annular portion to both sides in the first axial direction. The unit with vibration correction function according to claim 2, characterized in that the first stopper portion is provided at the tip of the protruding portion.

11. The cylindrical portion comprises a base portion disposed inside the wall portion and a tip portion protruding from the inside of the wall portion in the axial direction. A projection is provided on the outer surface of the tip portion. A notch is provided on the inner periphery of the annular portion through which the projection can pass. The vibration correction unit according to claim 10, characterized in that when the angular positions of the pair of protrusions and the angular positions of the pair of first swing support parts are aligned, the angular position of the notch and the angular position of the projection are misaligned, and the inner periphery of the annular part and the projection overlap when viewed from the axial direction.

Images