KR102545041B1 - Optical unit having shaking correction function - Google Patents

Abstract

An object of the present invention is to miniaturize an optical unit equipped with a shake correction function.
To this end, the optical unit 100 includes a movable body 10 holding the optical module 1 by the holder 40 and a body portion 211 having a rectangular cylinder shape surrounding the movable body 10. It has a body 20 and a support mechanism 30 that supports the movable body 10 relative to the stationary body 20 so as to be able to swing. The holder 40 has wall portions 43 to 46 for holding the coil 53 on the outer circumferential side of the optical module 1 . The movable frame 39 of the support mechanism 30 has a fulcrum portion 391 in contact with the first swing support portion 36 and the second swing support portion 37 . The support point portion 391 is located on the outer circumferential side of the wall portions 43 to 46, and the connection portion 392 connecting the support point portion 391 and the support point portion 391 is on the inside so as to pass through the inner circumferential side of the wall portions 43 to 46. has a concave shape. The inner portions of the wall portions 43 to 46 and the coils 53 and magnets 52 disposed on the outer circumferential side thereof are located closer to the inner circumferential side than the support point portion 391 .

Description

Optical unit with shake correction {OPTICAL UNIT HAVING SHAKING CORRECTION FUNCTION}

The present invention relates to an optical unit equipped with a shake correction function mounted in an optical device.

BACKGROUND ART Conventionally, various optical devices equipped with an optical unit for photographing have been used. Such an optical unit includes a mechanism for correcting shake by shaking the optical module in order to suppress the shake of the captured image due to hand shake or vibration. Such a mechanism includes a gimbal mechanism disposed between the movable body and the fixed body as a support mechanism for swingably supporting the optical module with respect to the fixed body. The gimbal mechanism includes a first rocking support part provided at two locations spaced apart in a first axial direction intersecting the optical axis direction between the movable body and the fixed body, and a second axial direction intersecting the optical axis direction and the first axial direction. A second rocking support part provided at two spaced apart positions, and a frame-shaped gimbal spring supported at four corners by the first rocking support part and the second rocking support part. Patent Document 1 discloses an optical unit equipped with a shake correction function equipped with such a gimbal mechanism.

Japanese Unexamined Patent Publication No. 2015-64501

The movable body of the optical unit with shake correction function of Patent Document 1 includes an optical module including a lens and the like, a holder holding the optical module, and a coil held by the holder on the outer circumferential side of the optical module. . The gimbal mechanism is arranged so that the first rocking support part, the second rocking support part and the gimbal spring surround the optical module, and the wall portion of the holder holding the coil surrounds the outer circumferential side of the gimbal mechanism. The stationary body includes an exterior case covering the movable body and a magnet held on the inner surface of the body of the exterior case, and the magnet is located on the outer circumferential side of the coil.

In this way, when the gimbal springs, coils, and magnets are overlapped and arranged on the outer circumferential side of the optical module, in order to further reduce the thickness of the optical unit with the shake correction function in the direction crossing the optical axis direction of the optical module, the optics Miniaturization of modules, thinning of coils, thinning of magnets, etc. must be achieved. However, there is a limit to miniaturization and thinning of these members or modules. Therefore, it is difficult to further reduce the thickness of the optical unit with shake correction function in the direction crossing the optical axis direction of the optical module, and it is difficult to reduce the size of the optical unit with shake correction function.

An object of the present invention is to miniaturize an optical unit equipped with a shake correction function in view of these points.

In order to solve the above problems, an optical unit with a shake correction function of the present invention includes a fixed body including a movable body holding an optical module as a holder, a body portion surrounding the movable body, and the movable body. a support mechanism for swingably supporting the movable body with respect to the fixed body, and a shake compensation drive mechanism for swinging the movable body, wherein the holder includes a plurality of wall portions positioned on an outer circumferential side of the optical module, and the wall The part holds and supports a part of the shake correction drive mechanism, the support mechanism includes a movable frame that surrounds the optical module, and a plurality of rocking support parts that support the movable frame, and the movable frame includes the rocking support part. A support point portion in contact with the support point portion and a connection portion connecting the support point portion and the support point portion are provided, the support point portion is located on an outer circumference side of the wall portion, and the connection portion is disposed so as to pass through the inner circumferential side of the wall portion.

According to the present invention, the movable frame supporting the movable body so as to be able to swing has a support point portion supported by the swing support portion and a connecting portion connecting therebetween. Further, the support point is located on the outer circumferential side of the wall portion, and the connection portion connecting the support point portion and the support point portion is disposed so as to pass through the inner circumferential side of the wall portion. In this way, there is no need to secure a space for arranging the fulcrum portion and the rocking support portion on the inner circumferential side of the wall portion. Therefore, the wall part and the drive mechanism for shake compensation can be disposed on the inner circumferential side. Therefore, the entire device can be miniaturized.

In the present invention, the holder has a rectangular shape, the wall portion extends along each side of the holder, a gap formed between adjacent wall portions in a circumferential direction is located at a corner portion of the holder, and the swing support portion , It is preferable to be disposed in the gap portion. In this way, the rocking support portion can be disposed at the corner portion of the holder using the gap portion. Accordingly, the width of the wall portion and the coil or magnet held by the wall portion can be increased. Further, while miniaturizing the entire device, it is possible to avoid shortening the circumferential length of the movable frame. Therefore, it is possible to avoid deterioration of the supporting function due to the shortening of the circumferential length of the movable frame. In this case, for example, when the coil is held on the outer surface of the wall portion and the magnet is held on the inner surface of the body portion, both sides of the coil in the direction along the wall portion as viewed from the optical axis direction It is preferable to configure the outermost side surface so that it protrudes from both side surfaces of the said wall part. With this configuration, the width of the coil held by the wall portion in the direction along the wall portion can be increased.

In the present invention, it is preferable that the connecting portion includes a meandering portion disposed on an inner circumferential side of the wall portion and a straight portion connecting the meandering portion and the support point portion, and the straight portion is disposed in the gap portion. In this way, the straight portion can be disposed at the corner portion of the holder using the gap portion. Accordingly, the width of the wall portion and the coil or magnet held by the wall portion can be increased. In this case, the support point portion is a portion extending in the circumferential direction to which a metal sphere is fixed to an inner surface, and the straight line portion extends from both sides of the support point portion in the circumferential direction to the inside of the gap portion, so that the straight portion is inside the gap portion. It can be configured to be connected to the meandering part.

In the present invention, the optical module includes an upper module containing a lens and having a rectangular parallelepiped shape, and each side surface of the rectangular parallelepiped shape of the upper module is along each side of the holder. It is preferable that a meandering portion formed to face the formed wall portion and disposed on an inner circumferential side of the wall portion in the connection portion is disposed between the side surface of the upper module and the wall portion. In this way, since the meandering portion is disposed using the space between the side surface of the upper module and the wall portion, the entire device can be miniaturized. In this case, the meandering portion may be formed so that curved portions that are folded to approach and separate from the wall portion follow each wall portion between the side surface of the upper module and the wall portion.

In the present invention, the holder includes a rectangular frame portion formed with a rectangular holding hole for disposing the rectangular optical module, and the frame portion includes the wall portion rising from each side end edge of the frame portion; , It is preferable that a reinforcing member for preventing the wall portion from collapsing is provided on the wall portion from the frame portion to the wall portion. In this way, the wall portion can be prevented from collapsing by the reinforcing member. In this case, if the front end of the wall part rising from each side end edge of the frame part is configured to be connected by a connecting plate having a circular opening formed in the center, the wall part rising from each side end edge of the frame part by the connecting plate. It becomes possible to prevent a fall.

In the present invention, the holder is made of resin, the reinforcing member is a metal plate, the linking plate is a metal plate, and the linking plate is a weight for adjusting the position of the center of gravity of the movable body in the optical axis direction of the optical module. In addition, it is preferable to make the tip of the reinforcing member on the opposite side of the optical axis direction protrude from the wall portion with respect to the frame portion and join the tip of the reinforcing member to the weight serving as the connecting plate. In this way, while it becomes possible to prevent the wall portion rising from each side edge of the frame portion from collapsing by the connecting plate, it also becomes possible to adjust the position of the center of gravity of the movable body in the optical axis direction.

In the present invention, the shake correction drive mechanism includes a coil and a magnet, one of the coil and the magnet is held on an outer surface of the wall portion, and the fulcrum portion has an outer circumference than the one of the coil and the magnet. It is preferable to be located on the side. In this way, since one of the coil and the magnet can be disposed on the inner circumferential side, the entire device can be miniaturized.

In the present invention, it is preferable that the coil and the other side of the magnet are held on an inner surface of the body portion, and a part of the coil and the other side of the magnet is located on an inner circumferential side of the support point portion. do. In this way, not only one side of the coil and the magnet but also the other side can be arranged on the inner circumferential side. Therefore, the entire device can be miniaturized.

In the present invention, it is preferable that the rocking support portion includes a contact spring and a contact spring holding portion, and the contact spring holding portion includes a contact spring wall portion for supporting the contact spring in a direction crossing the optical axis direction. . In this way, the contact spring can be held reliably. Further, since the contact spring holding portion can be disposed on the outer circumferential side of the wall portion, space for forming the contact spring holding portion can be secured even when the device is downsized.

In the present invention, it is preferable that the contact spring holding portion includes a regulating portion for regulating movement of the movable frame in the optical axis direction. In this way, it is possible to avoid that the movable frame moves away from the swing support portion due to movement in the direction of the optical axis.

According to the present invention, the movable frame supporting the movable body so as to be able to swing has a support point portion supported by the swing support portion and a connecting portion connecting therebetween. And, the support point is located on the outer circumferential side of the wall portion, and the connection portion connecting the support point portion and the support point portion is disposed so as to pass through the inner circumferential side of the wall portion. In this way, it is not necessary to secure a space for arranging the support point portion and the rocking support portion on the inner circumferential side of the wall portion. Therefore, the wall part and the drive mechanism for shake compensation can be disposed on the inner circumferential side. Therefore, the entire device can be miniaturized.

1 is a perspective view of an optical unit equipped with a shake correction function to which the present invention is applied.
2 is a cross-sectional view of the optical unit of FIG. 1;
3 is an exploded perspective view of the optical unit of FIG. 1;
4 is an exploded perspective view of a movable body;
5 is a plan view of the optical unit with the first case and weight removed;
Fig. 6 is an exploded perspective view of the support mechanism;
Fig. 7 is an explanatory diagram of a support mechanism;

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. In this specification, the three axes of XYZ are directions orthogonal to each other, one side in the X-axis direction is represented by +X and the other side by -X, one side in the Y-axis direction is represented by +Y, and the other side is represented by -Y , One side of the Z-axis direction is denoted by +Z, and the other side by -Z. The Z-axis direction is a direction along an optical axis L (optical axis of a lens) of an optical module included in an optical unit. Further, the -Z direction is the upper side of the optical axis L direction, and the +Z direction is the subject side of the optical axis L direction.

(full configuration)

Fig. 1 is a perspective view of an optical unit 100 (hereinafter referred to as "optical unit 100") equipped with a shake correction function to which the present invention is applied, and Fig. 1 (a) is viewed from the subject side (+Z direction side). A perspective view, FIG. 1(b) is a perspective view seen from the upper side (-Z direction side). 2 is a cross-sectional view (A-A cross-sectional view of FIG. 1(a) ) of the optical unit 100, and FIG. 3 is an exploded perspective view of the optical unit 100. As shown in FIG. The optical unit 100 is mounted on an optical device such as a mobile phone with a camera, for example. When shaking, such as hand shaking, occurs in an optical device during photographing, disturbance occurs in a captured image. Rotation around the X-axis of the optical unit 100 corresponds to so-called pitching (vertical rocking), rotation around the Y-axis corresponds to so-called yawing (lateral rocking), and rotation around the Z-axis corresponds to so-called rolling. considerable

As shown in FIGS. 2 and 3 , the optical unit 100 supports the movable body 10, the fixed body 20, and the movable body 10 so as to swing with respect to the fixed body 20. Connecting the mechanism 30 and the shake correction drive mechanism 50 that generates a magnetic driving force that relatively displaces the movable body 10 relative to the fixed body 20, and the movable body 10 and the fixed body 20 A plate-shaped spring 70 is provided. The optical unit 100 is electrically connected, via a flexible wiring board (not shown), to an upper control unit or the like provided on the body side of the optical device on which the optical unit 100 is mounted. In addition, the optical unit 100 is equipped with a gyroscope (shake detection sensor) not shown. When a shake such as hand shake occurs in the optical device, the hand shake is detected and a shake correcting driving mechanism 50 is driven to cause the movable body 10 to swing to perform shake correction.

With respect to the fixed body 20, the movable body 10 is oscillatingly supported around the first axis R1 (see FIG. 1(a)) intersecting the optical axis L, and the optical axis L and the first axis R1 It is supported so that it can swing around the 2nd axis line R2 (refer to FIG. 1 (a)) intersecting with. In this embodiment, the first axis R1 and the second axis R2 are orthogonal to the optical axis L. In addition, the first axis line R1 and the second axis line R2 are orthogonal to each other.

(fixed body)

The fixture 20 includes a first case 210 and a second case 250 having a square shape when viewed in the Z-axis direction. The first case 210 is assembled from the +Z direction side with respect to the second case 250, and is fixed to the second case 250 by welding or the like. The first case 210 includes a rectangular cylinder body portion 211 surrounding the periphery of the movable body 10, and a rectangular frame-shaped end plate portion protruding inward from an end portion of the body portion 211 in the +Z direction. (212). A rectangular window 214 is formed in the end plate portion 212 . The body portion 211 includes a side plate portion 216 located on the +X direction side, a side plate portion 217 located on the -X direction side, and a side plate portion 218 located on the +Y direction side, - A side plate portion 219 located on the Y-direction side is provided. A protruding portion 213 protruding in the -Z direction is formed at a corner portion to which adjacent side plate portions are connected.

The second case 250 includes a bottom plate portion 251 having a rectangular frame shape having an opening 252 formed therein, and side wall portions 253, 254, 255, and 256 rising in the +Z direction from four corners of the bottom plate portion 251. to provide When the first case 210 is assembled to the second case 250 , the protrusions 213 of the first case 210 cover the side wall portions 253 , 254 , 255 , and 256 . As shown in Fig. 3, protrusions 257 protruding toward the inner circumference are formed on side wall portions 253 and 255 formed at diagonal positions on the first axis line R1, respectively. The protrusion 257 is formed with a first contact spring holding portion 31 constituting the first rocking support portion 36 of the support mechanism 30 . The first contact spring holding portion 31 includes a concave portion 311 formed on the protruding portion 257, a contact spring wall portion 312 protruding in the +Z direction from the inner circumferential side of the concave portion 311, and a concave portion ( 311) is provided with a regulating portion 313 located on the outer circumferential side. The regulating portion 313 is a portion located on the outer circumferential side of the concave portion 311 in the protruding portion 257 .

(drive mechanism for shake compensation)

The shake correction drive mechanism 50 includes four sets of magnetic drive mechanisms 51 installed between the fixed body 20 and the movable body 10 . Each magnetic drive mechanism 51 includes a magnet 52 and a coil 53 . The coil 53 is a hollow core coil, and is held on the +X direction side and -X direction side surfaces of the movable body 10 and the +Y direction side and -Y direction side surfaces of the movable body 10, respectively. In the body part 211 of the first case 210, the magnet 52 is the inner surface of the side plate part 216 located on the +X direction side, the inner surface of the side plate part 217 located on the -X direction side, It is held on the inner surface of the side plate part 218 located on the +Y direction side and the inner surface of the side plate part 219 located on the -Y direction side. Therefore, between the movable body 10 and the body portion 211 of the first case 210, in any case of the +X direction side, -X direction side, +Y direction side, and -Y direction side, the magnet 52 ) and the coil 53 are opposed.

The outer side of the magnet 52 in contact with the body portion 211 and the inner surface side facing the coil 53 are magnetized with different poles. Further, the magnet 52 is divided into two in the optical axis L direction (ie, Z-axis direction), and the magnetic poles on the inner side are magnetized so that they are different at the division position. For this reason, the upper and lower long sides of the coil 53 are used as effective sides. The four magnets have the same magnetization patterns on the outer and inner surfaces. The first case 210 is made of a magnetic material and functions as a yoke for the magnet 52 .

(movable body)

FIG. 4 is an exploded perspective view of the movable body 10, and FIG. 5 is a plan view of the optical unit 100 with the first case 210 and the weight 11 removed. The movable body 10 includes an optical module 1, a holder 40 holding the optical module 1, and a weight 11 fixed to the +Z direction side of the holder 40. The optical module 1 is arranged so that the optical axis L is directed in the Z-axis direction. The weight 11 is attached to the object-side (+Z direction side) end portions (relative to the frame portion 41) of the wall portions 43, 44, 45, and 46 elevated from the frame portion 41 of the holder 40 described later. side opposite to the optical axis direction) while serving as a connecting plate connecting the center of gravity in the Z-axis direction of the movable body 10 is adjusted. The weight 11 is a rectangular metal plate, and a circular opening 13 is formed in the center thereof. On the outer periphery of the weight 11, two concave portions 12 are formed on each side, and the protruding portion 81 of the reinforcing member 80 and the concave portion 12 of the weight 11, which will be described later, are engaged with each other. By fixing, the wall portions 43, 44, 45, and 46 rising from the frame portion 41 are held mutually, and the wall portions 43, 44, 45, and 46 can be prevented from falling over. Since the weight 11 is a non-magnetic metal, no magnetic attraction force is generated between the weight 11 and the magnet 52 .

The optical module 1 includes an upper module 2 incorporating a lens and an imaging device as optical elements, and a lower module 3 incorporating electronic components such as a gyroscope and a wiring board. The upper module 2 has a rectangular parallelepiped shape. A cylindrical lens holder 4 protrudes from the surface of the upper module 2 in the +Z direction. The lower module 3 has a rectangular parallelepiped shape that is one size larger than the upper module 2 . The lower module 3 is located on the -Z direction side of the upper module 2, and extends outward from the upper module 2 by the same dimensions in the +X direction side, -X direction side, +Y direction side, and -Y direction side. is protruding When the optical module 1 is viewed in the Z-axis direction, the lens holder 4 is circular with the optical axis L as the center, but the upper module 2 and the lower module 3 have square shapes.

The holder 40 constitutes an outer peripheral portion of the movable body 10 . The holder 40 includes a frame portion 41 having a substantially rectangular, specifically, substantially square planar shape when viewed from the Z-axis direction. A rectangular holding hole 42 is formed in the frame portion 41 to place the upper module 2 of the optical module 1 thereon. The holder 40 has wall portions 43, 44, 45 that rise in the +Z direction from each side end edge of the frame portion 41 in the +X direction, -X direction, +Y direction, and -Y direction. 46) is provided. The wall portions 43, 44, 45, and 46 are arranged so as to surround the outer circumferential side of the holding hole 42, and extend from the center of each side edge of the frame portion 41 in a straight line in the X-axis direction or the Y-axis direction. is extended Between the outer peripheral surface of the upper module 2 disposed in the holding hole 42 and the wall portions 43, 44, 45 and 46, a space in which a movable frame 39 of the support mechanism 30 described later can be disposed is formed.

The wall portions 43 , 44 , 45 , and 46 each have a coil holding portion 47 formed on an outer surface facing the opposite side to the holding hole 42 . The coil holding portion 47 is a rectangular convex portion protruding from the outer surfaces of the wall portions 43, 44, 45, and 46. The coil 53 of the magnetic drive mechanism 51 is disposed on the outer circumferential side of the coil holding portion 47 . The coil 53 is fixed to the outer surfaces of the wall portions 43, 44, 45 and 46 with an adhesive or the like, with the coil holding portion 47 sandwiched in its center. In the state where the coil 53 is fixed to the wall portions 43, 44, 45, and 46, as shown in FIG. 5, the coil faces both end surfaces of the wall portions 43, 44, 45, and 46 as viewed from the optical axis direction L. By protruding both outer end surfaces of (53), the width in the direction along the wall portions 43, 44, 45, and 46 of the coil 53 is set larger than the width of the wall portions 43, 44, 45, and 46, However, since the support points 391 provided at four locations around the optical axis L of the movable frame 39 are provided at four corners of the body portion 211 of the first case 210, the wall portions 43, 44, Even if the width of the coil 53 is increased relative to the width of 45 and 46, the width of the gap between the wall portions adjacent in the circumferential direction (gap portions 401, 402, 403, and 404) and the coil adjacent in the circumferential direction ( 53) can secure almost the same width of the gap between them. The coil 53 may be formed by winding a winding around the coil holding portion 47, or may be formed in advance in the shape of a hollow core coil and may be attached to the coil holding portion 47. As shown in FIG. 2 , the coil holding portion 47 protrudes from the center of the coil 53 toward the magnet 52 and faces the magnet 52 . When the movable body 10 is displaced in the X-axis direction or the Y-axis direction due to vibration or the like, the coil holding portion 47 contacts the magnet 52 to restrict the movement range of the movable body 10 .

The frame portion 41 has cutouts 48 formed at diagonal positions on the first axis line R1. The cutout portion 48 is a portion obtained by cutting two corner portions located at diagonal positions on the first axis line R1 in a plane perpendicular to the first axis line R1. As shown in FIG. 5, the cutout 48 is formed between the wall portion 43 on the X-direction side and the wall portion 45 on the +Y-direction side, and the gap 401 and the wall portion 44 on the -X-direction side. and the gap portion 402 formed between the wall portion 46 on the -Y direction side. When the movable body 10 is assembled with respect to the fixed body 20, the protruding portion 257 formed at a diagonal position on the first axis line R1 of the second case 250 faces the cutout portion 48. The first contact spring holding portion 31 provided on the protruding portion 257 forms a gap portion 401 between the wall portion 43 and the wall portion 45 and the wall portion at a diagonal position on the first axis line R1 of the frame portion 41. It is disposed in the gap 402 between the 44 and the wall 46.

A second contact spring holding portion 32 constituting the second rocking support portion 37 of the support mechanism 30 is formed at a diagonal position on the second axis line R2 of the frame portion 41 . The second contact spring holding portion 32 is a gap portion 403 formed between the wall portion 43 on the +X direction side and the wall portion 46 on the -Y direction side and the wall portion 44 on the -X direction side and the +Y direction side wall portion 403. It is disposed in the gap portion 404 formed between the wall portions 45 on the direction side. As shown in FIG. 4, the second contact spring holding portion 32 includes a contact spring wall portion 322 that rises in the +Z direction, and a protruding portion 321 that protrudes from the base of the contact spring wall portion 322 toward the outer circumference. and a regulating portion 323 protruding in the +Z direction from the front end of the protruding portion 321 .

The outer circumferential surface of the frame portion 41 has a stepped shape on the +X-direction side, -X-direction side, +Y-direction side, and -Y-direction side at an intermediate position in the Z-axis direction. That is, as shown in FIGS. 3 and 4, the portion on the +Z direction side of the outer circumferential surface of the frame portion 41 forms a protruding portion 411 protruding toward the outer circumferential side. On the other hand, the portion on the -Z direction side of the outer circumferential surface of the frame portion 41 forms a stepped portion 412 that is recessed toward the inner circumferential side. In the stepped portion 412, a fixing convex portion 413 protruding from the center to the outer circumferential side of each surface facing the +X direction side, -X direction side, +Y direction side, and -Y direction side is formed. The fixing convex portion 413 functions as an engaging portion that engages the plate-shaped spring 70 as will be described later.

The holder 40 is made of resin and has a reinforcing member 80 integrated with the resin portion by insert molding (see Figs. 2 and 4). The reinforcing member 80 of this form is a U-shaped metal plate, and one reinforcing member 80 is embedded and disposed in the wall portions 43, 44, 45, and 46, respectively. The reinforcing member 80 extends from each side edge of the frame portion 41 to the lower end of the wall portions 43, 44, 45, and 46 raised in the +Z direction (-Z direction side), that is, the frame portion 41 ) is extended to within (see FIG. 2). Accordingly, the reinforcing member 80 has a function of reinforcing the wall portions 43, 44, 45, and 46 so as not to tilt and bend at their lower ends, thereby increasing the impact resistance of the holder 40. Further, the reinforcing member 80 is provided with projections 81 protruding in the +Z direction at two locations on the end faces of the wall portions 43, 44, 45 and 46 in the +Z direction. A concave portion 12 is formed at a position corresponding to the protruding portion 81 on the end surface of the outer circumferential side of the weight 11 . When the weight 11 is fixed to the holder 40, positioning of the weight 11 can be performed by arranging the protruding portion 81 in the concave portion 12. Further, since both the reinforcing member 80 and the weight 11 are made of metal, the weight 11 can be fixed to the holder 40 by joining the metals to each other at the protruding portion 81 and the concave portion 12. . When the weight 11 is fixed to the wall portions 43, 44, 45, and 46, the wall portions 43, 44, 45, and 46 rising in the +Z direction in a cantilever shape from each side edge of the frame portion 41 , It can be configured to support each other by connecting via the weight 11, and it is possible to prevent the walls 43, 44, 45, 46 from falling over. For this reason, since the weight 11 also acts as a connecting plate for the wall portions 43, 44, 45, and 46, this part is used only as a simple connecting plate, and the function as the weight 11 is given to other parts. can be configured to do so.

In addition, you may insert into the frame part 41 the metal member of the rectangular frame shape which connects the lower ends of the reinforcing member 80 inserted into the wall part 43, 44, 45, 46 with each other. In this case, the holder 40 is formed by inserting an integral reinforcing member on which a U-shaped metal plate is raised from each side of a rectangular frame-shaped metal member into the resin part.

Holder 40, as shown in Figure 2, while the upper module 2 is placed in the holding hole 42, the lower end of the frame portion 41 and the upper end of the lower module 3 in the Z-axis direction The optical module 1 is held in a contacted state. When the movable body 10 is assembled to the fixed body 20, at the lower end of the optical unit 100, as shown in FIG. 1 (b) and FIG. 2, the opening of the second case 250 ( 252, the lower part of the frame part 41 and the lower module 3 protrude toward the -Z direction side.

(plate spring)

The plate-shaped spring 70 is a member that connects the stationary body 20 and the movable body 10 and defines the posture of the movable body 10 when the shake compensation drive mechanism 50 is in a stationary state. The plate-shaped spring 70 is a spring member in the shape of a rectangular frame obtained by processing a metal plate. The plate-shaped spring 70 includes a fixed body side connecting portion 71 connected to the fixed body 20, a movable body side connecting portion 72 connected to the movable body 10, a fixed body side connecting portion 71 and a movable body side connecting portion. An arm portion 73 connecting 72 is provided. As shown in (b) of FIG. 1, at the four corners of the bottom plate portion 251 when the second case 250 is viewed from the -Z direction side, there are convex portions 258 for fixation protruding in the -Z direction. is formed The stationary body side connecting portion 71 is formed on the outer circumference of the plate-shaped spring 70, and has a hole into which the fixing convex portion 258 is fitted. On the other hand, the movable body side connecting portion 72 is formed on the inner periphery of the plate-shaped spring 70. The movable body side connecting portion 72 is a concave portion formed at a position corresponding to the fixing convex portion 413 formed on the outer circumferential surface of the holder 40 .

The plate-shaped spring 70 overlaps the bottom plate portion 251 of the second case 250 from the -Z direction side, and protrudes from the opening 252 of the second case 250, the portion of the movable body 10 (holder It is installed so as to surround the frame portion 41 of (40). The fixed body side connecting portion 71 of the plate spring 70 is fixed to the fixed convex portion 258 formed on the fixed body 20 (second case 250), and the movable body side connecting portion of the plate spring 70 ( 72) is engaged with the fixing convex portion 413 formed on the movable body 10 (holder 40). Thereby, the stationary body 20 and the movable body 10 are connected via the plate-shaped spring 70.

(support mechanism)

6 is an exploded perspective view of the support mechanism 30 . Fig. 7 is an explanatory view of the support mechanism 30, Fig. 7 (a) is a perspective view of a state in which the support mechanism 30 is assembled, and Fig. 7 (b) is a sectional view of the first rocking support section (Fig. 7 (a) is a partial cross-sectional view taken at a position B-B), and FIG. 7(c) is a cross-sectional view of the second rocking support (partial cross-sectional view taken at a position C-C in (a) of FIG. 7)). As described above, in the optical unit 100 of this aspect, in supporting the movable body 10 so as to be able to swing around the first axis R1 and the second axis R2, the second Between the case 250 and the holder 40 of the movable body 10, a support mechanism 30 described below is configured. In this embodiment, a gimbal mechanism is used as the support mechanism 30 . The support mechanism 30 (gimbal mechanism) includes first rocking support units 36 provided at two locations spaced apart in the first axis R1 direction, and second rocking support units provided at two locations spaced apart in the second axis R2 direction. (37) and a movable frame (39) supported by the first rocking support part (36) and the second rocking support part (37).

The movable frame 39 is a gimbal spring including a generally rectangular plate spring. The movable frame 39 is a connecting portion connecting support points 391 serving as support points for swingably supporting the movable body 10 installed at four locations around the optical axis L and support points 391 adjacent to each other around the optical axis L. (392). Two of the support points 391 are provided at diagonal positions on the first axis line R1, and the remaining two positions are provided at diagonal positions on the second axis line R2. The connecting portion 392 includes a meandering portion 393 extending in the X-axis direction or the Y-axis direction, and a straight portion 394 extending from both ends of the meandering portion 393 to the support point portion 391, respectively. The meandering portion 393 meanders in a plane perpendicular to the Z-axis direction (ie, the optical axis L direction) and extends in the X-axis direction or the Y-axis direction. Specifically, the meandering portion 393 is inside each of the wall portions 43, 44, 45, and 46 and at a position outside the side surface of the upper module 2 of the optical module 1, at each wall portion. Curved portions meandering (folding) to approach and separate from (43, 44, 45, 46) are formed along the respective wall portions. Each side of the upper module 2 is also meandered (folded and bent) so that the curved parts approach and separate. That is, the meandering portion 393 is formed by curving the curved portion in a zigzag manner between the wall portions 43, 44, 45, and 46 disposed parallel to each other and the side surface of the upper module 2. In addition, at least in the non-operating state of the optical unit 100, the meandering portion 393 is spaced apart from the wall portions 43, 44, 45, and 46 and the side surfaces of the upper module 2, and is not in contact with them. . Therefore, the meandering portion 393 can be elastically deformed in a direction orthogonal to the optical axis L.

Each support point portion 391 extends in the circumferential direction. Metal spheres 38 are fixed to the inner surface of each support point portion 391 by welding or the like. By this sphere 38, a hemispherical convex surface facing the center of the movable frame 39 is formed at each support point portion 391. Straight portions 394 extend in parallel from both ends of each support point portion 391 in the circumferential direction toward the inner circumferential side, respectively. Therefore, the support point portion 391 is an extension portion extending in the circumferential direction to which the sphere 38 is fixed, and also a portion connecting two straight portions 394 extending in parallel. The straight portion 394 extends to the inner peripheral side of the wall portions 43, 44, 45, and 46, and is connected to the meandering portion 393 at the inner peripheral side of the wall portions 43, 44, 45, and 46.

The first rocking support portion 36 includes a first contact spring holding portion 31 installed in the second case 250 of the stationary body 20 and a first contact spring held by the first contact spring holding portion 31. (33) is provided. The first contact spring 33 is a plate spring made of metal bent in a U shape. The first contact spring 33 includes a fixed-side leaf spring portion 331 and a movable-side leaf spring portion 332 extending in the Z-axis direction, and a fixed-side leaf spring portion 331 extending in a direction crossing the Z-axis direction. ) and the folding portion 333 that connects the movable side leaf spring portion 332, and the side opposite to the stationary side leaf spring portion 331 from the end of the movable side leaf spring portion 332 in the +Z direction (that is, the outer circumferential side). ) and a bent portion 334 protruding. In the first contact spring 33, the fixed-side plate spring portion 331 moves in a direction perpendicular to the optical axis L direction (first axis R1 direction) with respect to the contact spring wall portion 312 of the first contact spring holding portion 31. Along with contacting, the folding portion 333 is arranged so as to contact the bottom surface of the concave portion 311 in the optical axis L direction. Therefore, the first contact spring 33 is supported by the contact spring wall portion 312 in a direction orthogonal to the optical axis L direction (first axis R1 direction), and is supported by the bottom surface of the concave portion 311 in the optical axis L direction. It is supported on the upper side (-Z direction).

The second rocking support portion 37 includes a second contact spring holding portion 32 installed in the holder 40 of the movable body 10 and a second contact spring 34 held by the second contact spring holding portion 32. ) is provided. The second contact spring 34 is a flat metal plate spring bent in a U shape and has the same shape as the first contact spring 33 . That is, the second contact spring 34 includes the fixed-side leaf spring portion 341 and the movable-side leaf spring portion 342 extending in the Z-axis direction, and the fixed-side leaf spring portion extending in a direction crossing the Z-axis direction. 341 and the folding portion 343 connecting the movable side leaf spring portion 342, and the side opposite to the fixed side leaf spring portion 341 from the end of the movable side leaf spring portion 342 in the +Z direction (i.e., and a bent portion 344 protruding to the outer circumferential side). In the second contact spring 34, the fixed-side plate spring portion 341 is perpendicular to the optical axis L direction (second axis R2 direction) with respect to the contact spring wall portion 322 of the second contact spring holding portion 32. With contact, the folding portion 343 is arranged so as to contact the projecting portion 321 from the upper side (-Z direction) in the optical axis L direction. Therefore, the second contact spring 34 is supported by the contact spring wall portion 322 in a direction orthogonal to the optical axis L direction (second axis R2 direction), and is supported by the protruding portion 321 in the upper (-) direction of the optical axis L. Z direction).

In the movable frame 39, a first rocking support portion 36 is disposed on the inner circumferential side of a support point portion 391 provided at a diagonal position in the direction of the first axis line R1, and a support point portion 391 provided at a diagonal position in the direction of the second axis line R2. ) is disposed on the inner circumference side, and is supported by these four rocking supports. The movable side leaf spring portion 332 of the first contact spring 33 and the movable side leaf spring portion 342 of the second contact spring 34 are contacted by spheres 38 welded to the support point portion 391, respectively. Hemispherical contact portions 335 and 345 are formed. The first oscillation support portion 36 and the second oscillation support portion 37 include a first contact spring 33 installed in a state elastically deformable in the direction of the first axis R1 and a first contact spring 33 provided in a state elastically deformable in the direction of the second axis R2. The movable frame 39 is supported via the two contact springs 34 . Since the movable frame 39, the first contact spring 33, and the second contact spring 34 are in contact with the sphere 38 through the hemispherical contact portions 335 and 345, the movable frame 39 It is supported in a rotatable state around each direction of two directions orthogonal to the optical axis L direction (first axis R1 direction and second axis R2 direction).

The movable frame 39 is formed in the optical axis L direction by the bent part 334 of the first contact spring 33 and the bent part 344 of the second contact spring 34 located on the +Z direction side of the support point part 391. The movement of to the subject side (+Z direction side) is restricted. In addition, the movable frame 39 is a protruding portion in the regulating portion 313, which is a portion located on the outer circumferential side of the concave portion 311 in the first contact spring holding portion 31, and the second contact spring holding portion 32. The movement upward in the optical axis L direction (-Z direction side) is restricted by the restricting portion 323 provided at the front end of 321 . That is, the first rocking support part 36 and the second rocking support part 37 are configured so that the movable frame 39 is not displaced by movement in the optical axis L direction.

Next, with reference to FIG. 5, the planar structure of the support mechanism 30 at the time of seeing in the optical axis L direction is demonstrated. Wall portions 43, 44, 45 and 46 are formed in the holder 40 of the movable body 10 so as to surround the upper module 2 of the optical module 1. The holder 40 has a square shape, and wall portions 43, 44, 45, and 46 extend in a straight line along each side of the holder 40. At the corners of the holder 40, gaps (gap portions 401, 402, 403, and 404 described above) formed between adjacent wall portions in the circumferential direction are positioned. The first rocking support part 36 and the second rocking support part 37 supporting the movable frame 39 are positioned in the circumferential direction of the gap formed between adjacent wall parts, that is, at the gap parts 401, 402, 403, and 404. are placed In addition, the first rocking support part 36 and the second rocking support part 37 supporting the movable frame 39 are the first case 210 and the second case 250, which are fixed bodies 20 having a square outer shape. is located in the corner of

In the movable frame 39, a support point portion 391 supported by the first swing support portion 36 and the second swing support portion 37 is located on the outer circumferential side of the wall portions 43, 44, 45, and 46. On the other hand, the meandering portion 393 of the movable frame 39 is located on the inner circumferential side of the wall portions 43, 44, 45, and 46, and the connection portion 392 connecting the support point portion 391 and the support point portion 391 It is arranged to pass through the space between the upper module 2 of the optical module 1 and the wall parts 43, 44, 45 and 46. The straight portion 394 connecting the meandering portion 393 and the support point portion 391 is the wall portion 43 parallel to the first axis R1 direction or the second axis R2 direction in the gap portions 401, 402, 403, and 404. , 44, 45, 46) extends from a position on the outer circumferential side to a position on the inner circumferential side of the wall portions 43, 44, 45, 46. The meandering portion 393 and the straight portions 394 on both sides thereof are connected in a concave shape toward the inner circumference as a whole. Therefore, on the outside of the meandering portion 393, a space in which the wall portions 43, 44, 45, and 46 and a part of the magnetic drive mechanism 51 can be placed is formed between the supporting point portions 391 and the supporting point portions 391. .

The support point portion 391 is located on the outer circumferential side of the coil 53 provided on the outer surface of the wall portions 43, 44, 45, and 46. Further, the fulcrum portion 391 is located on the outer circumferential side of the inner surface of the magnet 52 facing the coil 53 from the outer circumferential side, but is located on the inner circumferential side on the outer surface of the magnet 52. The entirety of the coil 53 and the inner portion of the magnet 52, together with the wall portions 43, 44, 45 and 46, are disposed in the space between the supporting point portions 391 and the supporting point portions 391.

(action effect)

As described above, in the support mechanism 30 of this embodiment, the support point portion 391 of the movable frame 39 is positioned in the circumferential direction of the gap (gap portions 401, 402, 403, 404) formed between adjacent wall portions. In the corner portion of the holder 40, it is located on the outer peripheral side of the wall portions 43, 44, 45, and 46. On the other hand, the support point portion 391 and the connecting portion 392 connecting the support point portion 391 are concave toward the inner circumference so that the meandering portion 393 passes through the inner circumferential side of the wall portions 43, 44, 45, and 46. . And the wall parts 43, 44, 45, 46 are arrange|positioned in this concave space. In this arrangement, a space for arranging the support point portion 391 and the first swing support portion 36 and the second swing support portion 37 supporting the support point portion 391 on the inner circumferential side of the wall portions 43, 44, 45, and 46. do not need to secure Therefore, since the wall portions 43, 44, 45, and 46 can be disposed on the inner circumferential side, the optical unit 100 can be reduced in thickness in the direction crossing the optical axis direction L, and the optical unit 100 can be miniaturized as a whole. there is. In addition, since the connection portion 392 is concave to the inner circumference side, it is possible to avoid deterioration of the support function due to a shortened circumferential length of the movable frame 39 due to downsizing.

Further, in this embodiment, the fulcrum portion 391 is located on the outer circumferential side of the entirety of the coil 53 constituting the magnetic drive mechanism 51 and the inner portion of the magnet 52 . Therefore, in the space surrounded by the support point portion 391 and the connection portion 392 recessed inwardly between the support point portion 391, not only the wall portions 43, 44, 45, and 46 but also the entirety of the coil 53 and the magnet The inner part of (52) can be arranged. Therefore, since not only the wall portions 43, 44, 45, and 46 but also the shake correction driving mechanism 50 can be disposed on the inner circumferential side, the optical unit 100 can be reduced in thickness in the direction crossing the optical axis direction L, The unit 100 can be miniaturized as a whole.

Further, in this embodiment, the holder 40 has a rectangular shape, and a space for arranging the first rocking support part 36 and the second rocking support part 37 for supporting the support point part 391 is secured by using the corner part thereof. . Therefore, while having a configuration in which the support point portion 391 is disposed on the outer circumferential side of the wall portions 43, 44, 45, and 46 and the coil 53, the width of the wall portions 43, 44, 45, and 46 and the coil 53 is reduced. can take a lot. Therefore, it is possible to avoid a decrease in the driving force of the shake correction drive mechanism 50 due to downsizing.

Further, in this embodiment, the first contact spring 33 and the second contact spring 34 are supported in a direction orthogonal to the optical axis L direction by the contact spring wall portion 312 or the contact spring wall portion 322, respectively. , is supported on the upper side (-Z direction) of the optical axis L direction by the bottom surface of the concave portion 311 or the protruding portion 321. Accordingly, the first contact spring 33 and the second contact spring 34 can be supported reliably. In addition, since the regulating portion 313 is provided in the first contact spring holding portion 31 and the regulating portion 323 is provided in the second contact spring holding portion 32, the movable frame 39 has an optical axis L There is an advantage that it does not deviate from the first rocking support part 36 and the second rocking support part 37 due to directional movement.

(modified example)

In the above configuration, the coil 53 is held by the holder 40 and the magnet 52 is held by the body 211 of the first case 210, but the holder 40 holds the magnet. 52 may be held, and the coil 53 may be held by the body 211 of the first case 210.

One… optical module
2… upper module
3... lower module
4… lens holder
10... movable body
11... wait
12... recess
13... circular opening
20... fixture
30... support mechanism
31... First contact spring holding portion
32... Second contact spring holding portion
33... 1st contact spring
34... 2nd contact spring
36... 1st rocking support part
37... 2nd rocking support part
38... sphere
39... movable frame
40... holder
41... frame part
42... retaining hole
43, 44, 45, 46... wall part
47... Coil holding support
48... notch
50... Drive Mechanism for Correction
51... magnetically driven mechanism
52... magnet
53... coil
70... plate spring
71... Fixed body side connection part
72... Movable Body Side Connection
73... arm part
80... reinforcing member
81... projection part
100... optical unit
210... Case 2
211... fuselage
212... end plate
213... projection part
214... window
216, 217, 218, 219... side plate
250... Case 2
251... bottom plate
252... opening
253... side wall
257... projection part
258... Convex part for fixation
311... recess
312... contact spring wall
313... regulatory department
321... projection part
322... contact spring wall
323... regulatory department
331... Fixed side plate spring part
332... Movable side leaf spring
333... folding part
334... bend
335... Contact part
341... Fixed side plate spring part
342... Movable side leaf spring
343... folding part
344... bend
345... Contact part
391... support point
392... connection
393... envoy department
394... straight part
401, 402, 403, 404... gap part
411... projection part
412... stepped part
413... Convex part for fixation
L... optical axis
R1... 1st axis
R2... 2nd axis

Claims (15)

A movable body holding and supporting the optical module as a holder;
A fixed body having a body portion surrounding the movable body;
a support mechanism for swingably supporting the movable body with respect to the fixed body;
a shake correction drive mechanism for swinging the movable body;
the holder includes a plurality of wall portions located on an outer circumferential side of the optical module, and the wall portions hold a part of the shake correction driving mechanism;
The support mechanism includes a movable frame that surrounds the optical module and a plurality of rocking support portions that support the movable frame;
The movable frame includes a support point portion in contact with the swing support portion and a connection portion connecting the support point portion and the support point portion;
The support point portion is located on the outer circumferential side of the wall portion,
The optical unit with a shake correction function, characterized in that the connecting portion is disposed so as to pass through the inner circumferential side of the wall portion. The method of claim 1, wherein the holder is rectangular,
The wall portion extends along each side of the holder,
A gap formed between the wall portions adjacent to the corner portion of the holder in the circumferential direction is located,
The optical unit with a shake correction function, characterized in that the shaking support portion is disposed in the gap portion. The method of claim 2, wherein the connecting portion includes a meandering portion disposed on an inner circumferential side of the wall portion and a straight portion connecting the meandering portion and the support point portion,
The optical unit with a shake correction function, characterized in that the straight portion is disposed in the gap portion. The method of claim 2, wherein the optical module includes an upper module having a rectangular parallelepiped shape and containing a lens,
Each side surface of the rectangular parallelepiped shape of the upper module is formed to face the wall portion formed along each side of the holder,
The optical unit with a shake correction function characterized in that the meandering portion disposed on the inner circumferential side of the wall portion in the connecting portion is disposed between the side surface of the upper module and the wall portion. The shake compensation function of claim 4, wherein the meandering part is formed between the side surface of the upper module and the wall part so that curved parts that are folded to approach and separate from the wall part follow each wall part. Optical unit having a. 5. The method of claim 4 , wherein the supporting point portion is a portion extending in a circumferential direction to which a metal sphere is fixed to an inner surface thereof, and a straight line connecting the meandering portion and the supporting point portion from both sides of the supporting point portion in a circumferential direction extends to the inner side of the gap portion. and the linear portion is connected to the meandering portion inside the gap portion. 5. The method of claim 4, wherein the holder has a rectangular frame portion formed with a rectangular holding hole for disposing the rectangular optical module,
The frame part includes the wall part rising from each side end edge of the frame part, and a reinforcing member for preventing the wall part from collapsing is installed on the wall part from the frame part to the wall part. Optical unit equipped with functions. 8. The optical unit with a shake correction function according to claim 7, wherein the front end of the wall part rising from each side edge of the frame part is connected by a connecting plate having a circular opening formed in the center thereof. The method of claim 8, wherein the holder is made of resin, the reinforcing member is a metal plate, and the connecting plate is a metal plate;
While using the linking plate as a weight for adjusting the position of the center of gravity of the movable body in the optical axis direction of the optical module,
A front end of the reinforcing member on the opposite side of the optical axis direction with respect to the frame part protrudes from the wall part, and the front end of the reinforcing member is bonded to the weight serving as the linking plate. unit. The method according to any one of claims 1 to 9, wherein the shake correction driving mechanism includes a coil and a magnet,
One of the coil and the magnet is held on an outer surface of the wall portion,
The optical unit with a shake correction function, characterized in that the support point is located on an outer circumferential side of the one of the coil and the magnet. 11. The method of claim 10, wherein the other side of the coil and the magnet is held on an inner surface of the body portion,
The optical unit with a shake correction function, characterized in that a part of the other side of the coil and the magnet is located on an inner circumferential side of the support point portion. 11. The method of claim 10, wherein the coil is held on an outer surface of the wall portion, while the magnet is held on an inner surface of the body portion;
The optical unit with a shake correction function according to claim 1 , wherein, when viewed from the optical axis direction of the optical module, both outermost side surfaces of the coil in a direction along the wall portion protrude from both side surfaces of the wall portion. 11. The method of claim 10, wherein the rocking support portion includes a contact spring and a contact spring holding portion,
The optical unit with a shake correction function according to claim 1 , wherein the contact spring holding portion includes a contact spring wall portion for supporting the contact spring in a direction crossing an optical axis direction of the optical module. 10. The rocking support portion according to any one of claims 1 to 9, wherein the swing support portion includes a contact spring and a contact spring holding portion;
The optical unit with a shake correction function according to claim 1 , wherein the contact spring holding portion includes a contact spring wall portion for supporting the contact spring in a direction crossing an optical axis direction of the optical module. 15. The optical unit with a shake correction function according to claim 14, wherein the contact spring holding portion includes a regulating portion for regulating movement of the movable frame in the optical axis direction.

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