Optical unit with shake correction function

Abstract

To suppress separation of the center of gravity of a movable body from an optical axis even when magnets are arranged on three sides of a rectangular holder.SOLUTION: An optical unit 1 includes: a movable body 3; a fixing body 4; a gimbal mechanism 5 that swingably supports the movable body 3 with respect to the fixing body 4; a first magnetic drive mechanism 6 that generates a magnetic force for swinging the movable body 3 around a first shaft N1; and a second magnetic drive mechanism 7 that generates a magnetic force for swinging the movable body 3 around a second shaft N2. The movable body 3 includes a frame-shaped holder 31 that holds an optical module 2 inside. The holder 31 includes: a pair of first sides 32 arranged side by side in a third direction; and a pair of second sides 33 arranged side by side in a fourth direction. The second magnetic drive mechanism 7 includes: two second magnets 71 each fixed to the respective second sides 33; and two second coils 72 fixed to the fixing body 4 and each facing the respective second magnets 71. When viewed in an optical-axis direction, the centers of gravity G2 of the two second magnets 71 are located on the other side in the third direction with respect to a fourth axis N4.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an optical unit with a shake correction function. [Background technology]

[0002] Some optical units mounted on mobile terminals or mobile objects are equipped with a mechanism for correcting shake by swinging or rotating a movable body on which the optical module is mounted in order to suppress distortion of captured images when the mobile terminal or mobile object is moving. Patent Document 1 discloses this type of optical unit with a shake correction function.

[0003] The optical unit with shake correction function disclosed in Patent Document 1 includes a movable body having an optical module, a gimbal mechanism that rotatably supports the movable body relative to a fixed body, and a magnetic drive mechanism that generates a magnetic force that rotates the movable body relative to the fixed body. The movable body includes a rectangular holder that fixes the optical module therein. The holder includes a pair of first wall portions aligned in a first direction perpendicular to the optical axis and a pair of second wall portions aligned in a second direction perpendicular to the optical axis and the first direction. The gimbal mechanism supports the movable body relative to the fixed body so that it can swing around a first axis that intersects the optical axis of the optical module and around a second axis that intersects the optical axis and the first axis. The magnetic drive mechanism includes first magnets fixed to the respective first wall portions, first coils facing the respective first magnets, second magnets fixed to the respective second wall portions, and second coils facing the respective second magnets. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2019-174790 Summary of the Invention [Problem to be solved by the invention]

[0005] In the optical unit with shake correction function of Patent Document 1, the first magnets are each disposed at the center of the first wall portion. The second magnets are each disposed at the center of the second wall portion. Therefore, when viewed from the optical axis direction, the center of gravity of the first magnets is located on a third axis that is perpendicular to the optical axis. When viewed from the optical axis direction, the center of gravity of the second magnets is located on a fourth axis that is perpendicular to the optical axis and the third axis. When viewed from the optical axis direction, the centers of gravity of the two first magnets and the two second magnets coincide with the optical axis.

[0006] The optical unit with shake correction function of Patent Document 1 is required to have a reduced number of parts and a lighter weight. Therefore, the number of parts may be reduced and the weight of the movable body may be reduced by reducing the number of pairs of magnets and coils. However, when three magnets are fixed to the movable body, the center of gravity of the three magnets is significantly separated from the optical axis when viewed from the optical axis direction. As a result, the center of gravity of the movable body is likely to be significantly separated from the optical axis when viewed from the optical axis direction.

[0007] When the center of gravity of the movable body is far away from the optical axis, the movable body supported by the gimbal mechanism tilts relative to the fixed body. When the movable body tilts, it becomes more difficult for the magnetic drive mechanism to stably rotate the movable body relative to the fixed body than when the movable body does not tilt, and the power consumed by the magnetic drive mechanism increases.

[0008] In view of the above problems, the object of the present invention is to provide an optical unit with a shake correction function that can prevent the center of gravity of the movable body from moving away from the optical axis, even when magnets are placed on each of the three sides of a rectangular holder. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the optical unit with shake correction function of the present invention includes a movable body having an optical module, a fixed body, a gimbal mechanism that supports the movable body relative to the fixed body so that it can swing about a first axis that intersects with an optical axis of the optical module and supports the movable body so that it can swing about a second axis that intersects with the optical axis and the first axis, a first magnetic drive mechanism that generates a magnetic force that swings the movable body about the first axis, and a second magnetic drive mechanism that generates a magnetic force that swings the movable body about the second axis, and the direction along the first axis is defined as a first direction, a direction along the second axis is defined as a second direction, a direction along a third axis that intersects with the optical axis and intersects with the first axis at 45°, and a third direction that intersects with the optical axis and If the direction along a fourth axis that intersects the third axis at 90° is defined as the fourth direction, the movable body comprises a frame-shaped holder that holds the optical module inside, the holder comprises a pair of first sides aligned in the third direction and a pair of second sides aligned in the fourth direction, the first magnetic drive mechanism comprises one first magnet fixed to one side of the first sides and a first coil fixed to the fixed body and facing the first magnet, the second magnetic drive mechanism comprises two second magnets fixed to the second sides respectively and two second coils fixed to the fixed body and facing the second magnets respectively, and the centers of gravity of the two second magnets are each located on the other side of the third direction with respect to the fourth axis when viewed from the optical axis direction. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of the optical unit of this embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the optical unit of FIG. [Figure 3] FIG. 3 is an exploded perspective view of the movable body. [Figure 4] FIG. 4 is a plan view of the movable body. [Figure 5] FIG. 5 is a diagram illustrating the relationship between the case and the second connection portion. [Figure 6] FIG. 6 is a diagram illustrating the gimbal mechanism. [Figure 7] FIG. 7 is a perspective view of the first hand, the first gripping unit, and the guide mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical unit with a shake correction function to which the present invention is applied will be described below with reference to the drawings.

[0012] FIG. 1 is a perspective view of an optical unit 100 of this embodiment. FIG. 2 is an exploded perspective view of the optical unit 100 of FIG. 1. FIG. 3 is an exploded perspective view of the movable body 3. FIG. 4 is a plan view of the movable body 3. FIG. 5 is a diagram illustrating the relationship between the case 41 and the second connection portion 53. FIG. 6 is a diagram illustrating the gimbal mechanism 5.

[0013] The optical unit 100 (optical unit with shake correction function) includes an optical module 2. The optical unit 100 is used in optical devices such as camera-equipped mobile phones and drive recorders, as well as in optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and radio-controlled helicopters. In such optical devices, if the optical device shakes during shooting, the captured image will be distorted. To prevent the captured image from being tilted, the optical unit 100 corrects the tilt of the optical module 2 based on the acceleration, angular velocity, amount of shake, etc. detected by detection means such as a gyroscope.

[0014] The optical unit 100 performs shake correction by rotating the optical module 2 about a first axis N1 (see FIGS. 2 and 4) that is perpendicular to the optical axis L of the optical module 2, and by rotating the optical module 2 about a second axis N2 that is perpendicular to the optical axis L and the first axis N1. The optical unit 100 of this embodiment performs pitching correction and yawing correction.

[0015] In the following description, three mutually orthogonal axes are referred to as the X-axis, Y-axis, and Z-axis. The Z-axis coincides with the optical axis L. In the Z-axis direction, the Z1 direction corresponds to one side of the optical axis direction, which is the subject side of the optical module 2, and the Z2 direction corresponds to the other side of the optical axis direction, which is the image side of the optical module 2. If the plane including the X-axis and Y-axis is defined as the XY plane, the first axis N1 and the second axis N2 are located on the XY plane. The first axis N1 and the second axis N2 are inclined at 45 degrees with respect to the X-axis and Y-axis. The direction along the first axis N1 is defined as the first direction, and the direction along the second axis N2 is defined as the second direction. As shown in FIGS. 2 and 4, the third axis N3, which intersects the optical axis L and the first axis N1 at 45°, coincides with the X-axis. In other words, the third direction, which is the direction along the third axis N3, is the X-axis direction. The fourth axis N4, which intersects the optical axis L and the third axis N3 at 90°, coincides with the Y-axis. That is, the fourth direction, which is the direction along the fourth axis N4, is the Y-axis direction.

[0016] As shown in Figures 1 and 2, the optical unit 100 includes a movable body 3 having an optical module 2, a gimbal mechanism 5, a fixed body 4 supporting the movable body 3 via the gimbal mechanism 5, a first magnetic drive mechanism 6 that generates a magnetic force that causes the movable body 3 to oscillate around a first axis N1, a second magnetic drive mechanism 7 that generates a magnetic force that causes the movable body 3 to oscillate around a second axis N2, and flexible printed circuit boards 8 and 9.

[0017] 3, optical module 2 includes a lens barrel 21 that holds a lens, a rectangular main body 22 that holds lens barrel 21, and a substrate 23 on which an imaging element is mounted. A flexible printed circuit board 8 is electrically connected to substrate 23. Flexible printed circuit board 8 is extended in the X2 direction.

[0018] As shown in FIGS. 2 to 4, the movable body 3 includes an optical module 2 and a frame-shaped holder 31 that holds the optical module 2 inside. The lens barrel 21 protrudes from the center of the holder 31 in the Z1 direction. The holder 31 is made of resin. The holder 31 includes a pair of first sides 32 aligned in the X-axis direction and a pair of second sides 33 aligned in the Y-axis direction. As shown in FIG. 3, a stopper 36 that protrudes in the Z2 direction is formed on the Z2-direction end of the second sides 33. The stopper 36 abuts against the fixed body 4, thereby restricting movement of the holder 31 in the Z2 direction.

[0019] 2 and 5, the fixed body 4 includes a rectangular case 41 that surrounds the outer periphery of the movable body 3, a first cover 42 that covers the case 41 from the Z1 direction of the case 41, and a second cover 43 that covers the case 41 from the Z2 direction of the case 41. The case 41 is made of resin. The first cover 42 and the second cover 43 are made of metal. As shown in FIG. 1, the lens barrel 21 is exposed from an opening in the center of the first cover 42.

[0020] The gimbal mechanism 5 supports the movable body 3 relative to the fixed body 4 so that it can swing about a first axis N1 intersecting the optical axis N1, and also supports the movable body 3 so that it can swing about a second axis N2. As shown in FIGS. 2 and 6, the gimbal mechanism 5 includes a gimbal frame 51, a first connection portion 52, and a second connection portion 53. The gimbal frame 51 is made of a metal leaf spring. As shown in FIG. 2, the gimbal frame 51 includes a frame-shaped main body 511, a pair of first arms 513 extending in the Z2 direction on both sides of the main body 511 in the first direction, and a pair of second arms 515 extending in the Z2 direction on both sides of the main body 511 in the second direction.

[0021] Main body 511 is located in the Z1 direction of movable body 3. Lens barrel 21 is exposed from an opening in the center of main body 511. Recess 514 is formed at the tip of first arm 513, recessed inward in the radial direction centered on optical axis L. Recess 516 is formed at the tip of second arm 515, recessed inward in the radial direction centered on optical axis L.

[0022] The first connecting portions 52 are made of metal. As shown in FIGS. 2, 4, and 6, two first connecting portions 52 are provided, and connect the movable body 3 and the first arm 513 rotatably around the first axis N1. The first connecting portions 52 are inserted into retaining holes 341 formed in corners of the holder 31 in the first direction. The first connecting portions 52 include protrusions 521 that protrude radially inward. The protrusions 521 fit into the recesses 516. As a result, the first arm 513 is rotatably supported in the recesses 516.

[0023] The second connecting portions 53 are made of metal. As shown in FIGS. 2, 4, and 6, two second connecting portions 53 are provided, and they connect the fixed body 4 and the second arm 515 rotatably around the second axis N2. As shown in FIGS. 2 and 5, the second connecting portions 53 are held by holding portions 413 formed at inner corners of the case 41 in the second direction. The second connecting portions 53 include protrusions 531 that protrude radially inward. The protrusions 531 are rotatably supported in the recesses 516. As a result, the second arm 515 is rotatably supported in the recesses 516.

[0024] As shown in FIGS. 2 to 4, the first magnetic drive mechanism 6 includes a first magnet 61 fixed to the first side 32 in the X1 direction, and a first coil 62 fixed to the fixed body 4 and facing the first magnet 61. The first magnet 61 is plate-shaped. The first magnet 61 extends in the Y-axis direction. The first magnet 61 is fixed to a recess 321 recessed inwardly of the first side 32. As shown in FIG. 4, the first magnet 61 is disposed symmetrically with respect to the third axis N3 when viewed from the optical axis direction. That is, the center of gravity of the first magnet 61 is located on the third axis N3. The first coil 62 is fixed to a coil fixing hole 411 that penetrates the side surface of the case 41 in the X1 direction.

[0025] As shown in FIGS. 2 to 4, the second magnetic drive mechanism 7 includes two second magnets 71 fixed to the second side 33, respectively, and two second coils 72 fixed to the fixed body 4 and facing the second magnets 71, respectively. The second magnets 71 are plate-shaped. The second magnets 71 extend in the X-axis direction. The two second magnets 71 have the same shape. The second magnets 71 are fixed to recesses 331 recessed inwardly of the second side 33. As shown in FIG. 4, the two second magnets 71 are each located in the X2 direction with respect to the fourth axis N4 when viewed from the optical axis direction. The centers of gravity G2 of the two second magnets 71 are each located in the X2 direction with respect to the fourth axis N4 when viewed from the optical axis direction. The second coils 72 are fixed to coil fixing holes 412 that penetrate the side surfaces of the case 41 in the Y1 and Y2 directions.

[0026] The first coil 62 and the second coil 72 are electrically connected to the flexible printed circuit board 9. The flexible printed circuit board 9 is fixed to the outer peripheral surface of the case 41. The flexible printed circuit board 9 is electrically connected to the flexible printed circuit board 8.

[0027] As shown in FIG. 4, the center of gravity G1 of the first magnet 61 and the two second magnets 71 coincides with the optical axis L when viewed from the optical axis direction. Furthermore, in this embodiment, the center of gravity G of the movable body 3 coincides with the optical axis L when viewed from the optical axis direction. Note that by adjusting the thickness of the first magnet 61 and the second magnet 71, the positions of the center of gravity G1 of the three magnets and the center of gravity G of the movable body 3 can be adjusted. Furthermore, by adjusting the fixed position of the second magnet 71 in the X-axis direction, the positions of the center of gravity G1 of the three magnets and the center of gravity G of the movable body 3 can be adjusted.

[0028] Here, fixed body 4 includes a first magnetic plate 44 fixed to the side of first coil 62 opposite to the side where first magnet 61 is arranged, and two second magnetic plates 45 fixed to the side of second coil 72 opposite to the side where second magnet 71 is arranged. First magnetic plate 44 and second magnetic plate 45 are fixed to the outer peripheral surface of flexible printed circuit board 9.

[0029] (Action and effect) In the optical unit 100 of this embodiment, the center of gravity G2 of the two second magnets 71 is When the second magnets 71 are fixed to the three sides of the holder 31, the center of gravity G of the movable body 3 is unlikely to deviate from the optical axis L. As a result, the first magnetic drive mechanism 6 and the second magnetic drive mechanism 7 can stably rotate the movable body 3 relative to the fixed body 4. Furthermore, the power consumed by the first magnetic drive mechanism 6 and the second magnetic drive mechanism 7 is reduced.

[0030] The two second magnets 71 have the same shape, which allows magnets of the same shape to be used, thereby reducing component costs.

[0031] The center of gravity G1 of the first magnet 61 and the two second magnets 71 coincides with the optical axis L when viewed in the optical axis direction. This makes it more difficult for the center of gravity G of the movable body 3 to deviate from the optical axis L. As a result, the first magnetic drive mechanism 6 and the second magnetic drive mechanism 7 can more stably rotate the movable body 3 relative to the fixed body 4. In addition, the power consumed by the first magnetic drive mechanism 6 and the second magnetic drive mechanism 7 is further reduced.

[0032] When viewed from the optical axis direction, the two second magnets 71 are each positioned in the X2 direction with respect to the fourth axis N4, which makes it easier to bring the center of gravity G of the movable body 3 and the optical axis L closer to each other.

[0033] The center of gravity G of the movable body 3 is characterized by coinciding with the optical axis L when viewed from the optical axis direction. As a result, the center of gravity G of the movable body 3 coincides with the optical axis L, and therefore the first magnetic drive mechanism 6 and the second magnetic drive mechanism 7 can more stably rotate the movable body 3 relative to the fixed body 4. In addition, the power consumed by the first magnetic drive mechanism 6 and the second magnetic drive mechanism 7 is further reduced.

[0034] The fixed body 4 includes a first magnetic plate 44 fixed to the side of the first coil 62 opposite to the side where the first magnet 61 is arranged, and two second magnetic plates 45 fixed to the side of the second coil 72 opposite to the side where the second magnet 71 is arranged. As a result, the first magnet 61 and the first magnetic plate 44, and the second magnet 71 and the second magnetic plate 45 attract each other by magnetic force, respectively, so that tilting of the movable body 3 relative to the fixed body 4 can be suppressed.

[0035] (Variation) Fig. 7 is a plan view of a movable body according to a modified example. As shown in Fig. 7, each second side 33 includes a first recess 334 that is recessed inward and that houses a second magnet 71, and a second recess 335 that is recessed inward and is positioned further in the X1 direction than the first recess 334. This allows the weight of the movable body 3 in the X1 direction to be smaller than that of the fourth axis N4, making it easier to bring the center of gravity G of the movable body 3 closer to the optical axis L.

[0036] In the above embodiment, the center of gravity G1 of the first magnet 61 and the two second magnets 71 coincides with the optical axis L when viewed from the optical axis direction, but it does not have to coincide with the optical axis L. Also, the center of gravity G of the movable body 3 coincides with the optical axis L when viewed from the optical axis direction, but it does not have to coincide with the optical axis L. In this case, if the centers of gravity G2 of the two second magnets 71 are each located in the X2 direction with respect to the fourth axis N4 when viewed from the optical axis direction, the center of gravity G of the movable body 3 will be closer to the optical axis L than when the centers of gravity G2 of the two second magnets 71 are located on the fourth axis N4, and therefore the optical unit 1 can stably correct the tilt of the optical module 2.

[0037] The present technology can be configured as follows.

[0038] (1) a movable body including an optical module; A fixed body; a gimbal mechanism that supports the movable body relative to the fixed body so that it can swing about a first axis that intersects with an optical axis of the optical module, and that supports the movable body so that it can swing about a second axis that intersects with the optical axis and the first axis; a first magnetic drive mechanism that generates a magnetic force that causes the movable body to swing around the first axis; a second magnetic drive mechanism that generates a magnetic force that causes the movable body to swing around the second axis; Equipped with Let us assume that the direction along the first axis is a first direction, the direction along the second axis is a second direction, the direction along a third axis that intersects with the optical axis and intersects with the first axis at 45° is a third direction, and the direction along a fourth axis that intersects with the optical axis and intersects with the third axis at 90° is a fourth direction. the movable body includes a frame-shaped holder that holds the optical module therein, the holder includes a pair of first sides aligned in the third direction and a pair of second sides aligned in the fourth direction, the first magnetic drive mechanism includes a first magnet fixed to one side of the first side, and a first coil fixed to the fixed body and facing the first magnet; the second magnetic drive mechanism includes two second magnets fixed to the second sides, respectively, and two second coils fixed to the fixed body and facing the second magnets, respectively; An optical unit with shake correction function, characterized in that the centers of gravity of the two second magnets are each located on the other side of the third direction with respect to the fourth axis when viewed from the optical axis direction.

[0039] This makes it difficult for the center of gravity of the movable body to deviate from the optical axis, even when magnets are fixed to each of the three sides of the holder. As a result, the first magnetic drive mechanism and the second magnetic drive mechanism can stably rotate the movable body relative to the fixed body. In addition, the power consumed by the first magnetic drive mechanism and the second magnetic drive mechanism is reduced.

[0040] (2) The optical unit with shake correction function described in (1) is characterized in that the two second magnets have the same shape.

[0041] This allows magnets of the same shape to be used, reducing component costs.

[0042] (3) The optical unit with shake correction function described in (1) or (2) is characterized in that the centers of gravity of the first magnet and the two second magnets coincide with the optical axis when viewed from the optical axis direction.

[0043] This makes it more difficult for the center of gravity of the movable body to deviate from the optical axis. As a result, the first magnetic drive mechanism and the second magnetic drive mechanism can rotate the movable body relative to the fixed body more stably. In addition, the power consumed by the first magnetic drive mechanism and the second magnetic drive mechanism is further reduced.

[0044] (4) An optical unit with shake correction function described in any one of (1) to (3), characterized in that the two second magnets are each located on the other side of the third direction relative to the fourth axis when viewed from the optical axis direction.

[0045] This makes it easier to bring the center of gravity of the movable body closer to the optical axis.

[0046] (5) The center of gravity of the movable body coincides with the optical axis when viewed from the optical axis direction. The optical unit with shake correction function according to any one of (1) to (4).

[0047] This allows the center of gravity of the movable body to coincide with the optical axis, allowing the first and second magnetic drive mechanisms to rotate the movable body relative to the fixed body more stably, and further reduces the power consumed by the first and second magnetic drive mechanisms.

[0048] (6) An optical unit with shake correction function described in any one of (1) to (5), characterized in that the second sides each have a first recess that is recessed inward and accommodates the second magnet, and a second recess that is recessed inward and is positioned on one side of the first recess in the third direction.

[0049] This allows the weight of the movable body on one side of the fourth axis in the third direction to be reduced, making it easier to bring the center of gravity of the movable body closer to the optical axis.

[0050] (7) The optical unit with shake correction function described in any one of (1) to (6) is characterized in that the fixed body comprises a first magnetic plate fixed to the side of the first coil opposite to the side on which the first magnet is arranged, and two second magnetic plates fixed to the side of the second coil opposite to the side on which the second magnet is arranged.

[0051] As a result, the first magnet and the first magnetic plate, and the second magnet and the second magnetic plate attract each other by magnetic force, and therefore it is possible to prevent the movable body from tilting relative to the fixed body.

[0052] (8) The optical unit with shake correction function described in any one of (1) to (7) is characterized in that the gimbal mechanism comprises a gimbal frame having a frame-shaped main body, a pair of first arms extending in a direction along the optical axis on both sides of the main body in the first direction, and a pair of second arms extending in a direction along the optical axis on both sides of the main body in the second direction, a pair of first connecting parts connecting the movable body and the first arms rotatably around the first axis, and a pair of second connecting parts connecting the fixed body and the second arms rotatably around the second axis. [Explanation of symbols]

[0053] 100...optical unit, 2...optical module, 3...movable body, 4...fixed body, 5...gimbal mechanism, 6...first magnetic drive mechanism, 7...second magnetic drive mechanism, 8...flexible printed circuit board, 9...flexible printed circuit board, 21...lens barrel, 22...main body, 23...substrate, 31...holder, 32...first edge, 33...second edge, 36...stopper, 41...case, 42...first cover, 43...second cover, 44...first magnetic plate, 45...second magnetic plate, 51...gimbal frame, 52...first connection portion, 53...second 2 connection portion, 61...first magnet, 62...first coil, 71...second magnet, 72...second coil, 321...recess, 331...recess, 334...first recess, 335...second recess, 341...retaining hole, 411...coil fixing hole, 412...coil fixing hole, 413...retaining portion, 511...main body, 513...first arm, 514...recess, 515...second arm, 516...recess, 521...protrusion, 531...protrusion, L...optical axis, N1...first axis, N2...second axis, N3...third axis, N4...fourth axis, G·G1·G2...center of gravity.

Claims

1. a movable body including an optical module; A fixed body; a gimbal mechanism that supports the movable body relative to the fixed body so that it can swing about a first axis that intersects with an optical axis of the optical module, and that supports the movable body so that it can swing about a second axis that intersects with the optical axis and the first axis; a first magnetic drive mechanism that generates a magnetic force that causes the movable body to swing around the first axis; a second magnetic drive mechanism that generates a magnetic force that causes the movable body to swing around the second axis; Equipped with Let us assume that the direction along the first axis is a first direction, the direction along the second axis is a second direction, the direction along a third axis that intersects with the optical axis and intersects with the first axis at 45° is a third direction, and the direction along a fourth axis that intersects with the optical axis and intersects with the third axis at 90° is a fourth direction. the movable body includes a frame-shaped holder that holds the optical module therein, the holder includes a pair of first sides aligned in the third direction and a pair of second sides aligned in the fourth direction, the first magnetic drive mechanism includes a first magnet fixed to one side of the first side, and a first coil fixed to the fixed body and facing the first magnet, the second magnetic drive mechanism includes two second magnets fixed to the second sides, respectively, and two second coils fixed to the fixed body and facing the second magnets, respectively; An optical unit with shake correction function, characterized in that the centers of gravity of the two second magnets are each located on the other side of the third direction with respect to the fourth axis when viewed from the optical axis direction.

2. 2. The optical unit with shake correction function according to claim 1, wherein the two second magnets have the same shape.

3. 2. The optical unit with shake correction function according to claim 1, wherein the centers of gravity of the first magnet and the two second magnets coincide with the optical axis when viewed from the optical axis direction.

4. The optical unit with shake correction function described in claim 1, characterized in that the two second magnets are each located on the other side of the third direction with respect to the fourth axis when viewed from the optical axis direction.

5. 2. The optical unit with shake correction function according to claim 1, wherein the center of gravity of the movable body coincides with the optical axis when viewed in the optical axis direction.

6. The optical unit with shake correction function described in claim 1, characterized in that the second sides each have a first recess that is recessed inward and accommodates the second magnet, and a second recess that is recessed inward and is positioned on one side of the first recess in the third direction.

7. The optical unit with shake correction function described in claim 1, characterized in that the fixed body comprises a first magnetic plate fixed to the side of the first coil opposite to the side on which the first magnet is arranged, and two second magnetic plates fixed to the side of the second coil opposite to the side on which the second magnet is arranged.

8. The gimbal mechanism includes a gimbal frame including a frame-shaped main body, a pair of first arms extending in a direction along the optical axis on both sides of the main body in the first direction, and a pair of second arms extending in a direction along the optical axis on both sides of the main body in the second direction; The optical unit with shake correction function described in claim 1, characterized in that it comprises a pair of first connection parts that connect the movable body and the first arm rotatably around the first axis, and a pair of second connection parts that connect the fixed body and the second arm rotatably around the second axis.

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