JP2016061957A - Optical unit with tremor correction function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical unit with a tremor correction function that can maintain a load to be applied to a contact part of a gimbal mechanism oscillatably supporting a movable body to an appropriate level.SOLUTION: In a gimbal mechanism 30 of an optical unit, a first contact spring 36 and second contact spring 37 are provided in a first oscillation fulcrum 31 and second oscillation fulcrum 32, and thus, an appropriate load can be applied to a contact point 365 in contact with a spherical body 38 in the first oscillation fulcrum 31, and a contact point 375 in contact with the spherical body 38 in the second oscillation fulcrum 32. The first contact spring 36 is provided on a stationary body 20 side, and the second contact spring 37 is provided on a movable body 10 side. The first contact spring 36 and second contact spring 37 are shaped into a leaf, and are provided with extension parts 362 and 372 extending from stationary parts 361 and 371, and a folding part 363 folded at an end of the extension parts 362 and 372.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an optical unit with a shake correction function mounted on a camera-equipped mobile phone or the like.

  2. Description of the Related Art In recent years, portable devices such as mobile phones have been configured as optical devices equipped with a photographing optical unit. In such an optical unit, a configuration has been proposed in which a shake is corrected by swinging a movable body in order to suppress disturbance of a captured image due to a user's hand shake. In order to perform such shake correction, it is necessary to support the movable body so as to be swingable with respect to the fixed body. Therefore, a configuration in which a gimbal mechanism is provided between the movable body and the fixed body has been proposed. Here, the gimbal mechanism has a movable frame provided between the movable body and the fixed body, and two positions separated in the first axis direction intersecting the optical axis direction between the movable frame and the fixed body. The first swing fulcrum provided, and the second swing fulcrum provided at two positions separated in the second axis direction intersecting the optical axis direction and the first axis direction between the movable frame and the movable body. (See Patent Document 1).

JP 2014-6522 A

  When the movable body is configured to be swingable around the first axis and the second axis by the gimbal mechanism described in Patent Document 1, the load at the contact portion at the first swing fulcrum and the second swing fulcrum is appropriate. It is required to be. For example, when the load at the contact portion is large, the movable body swings smoothly to one side but does not swing smoothly to the other side. In addition, when the load at the contact portion is small, there arises a problem that unnecessary vibration is likely to occur in the movable body due to vibration transmitted from the outside.

  In view of the above problems, an object of the present invention is to provide an optical unit with a shake correction function capable of setting an appropriate level of load applied to a contact portion of a gimbal mechanism that supports a movable body in a swingable manner. It is in.

  In order to solve the above problems, the present invention supports a movable body provided with an optical element, and a gimbal mechanism so that the movable body can swing around a first axis intersecting the optical axis direction. A fixed body that is swingably supported around an optical axis direction and a second axis that intersects the first axis; and a drive mechanism that drives the movable body around the first axis and the second axis. The gimbal mechanism includes a movable frame, first swing fulcrums provided at two positions spaced apart in the first axis direction between the movable frame and the fixed body, the movable frame, and the movable body. And a second swing fulcrum provided at two locations spaced apart in the second axis direction between the first swing fulcrum and the second swing fulcrum. A contact bar that applies an elastic load to the contact portion with the movable frame side. Wherein the is provided.

In the present invention, at least one of the first swing fulcrum and the second swing fulcrum of the gimbal mechanism is provided with a contact spring for applying an elastic load to the contact portion with the movable frame side. Therefore, an appropriate load can be applied to the contact portion with the movable frame side at the swing fulcrum by the contact spring. Therefore, the swing fulcrum can be smoothly swung to one side and the other side, and unnecessary vibration of the movable body due to vibration transmitted from the outside can be suppressed.

  In the present invention, the contact spring is provided as a first contact spring at each of the two first swing fulcrums, and is provided as a second contact spring at each of the two second swing fulcrums. It is preferable that According to this configuration, an appropriate load can be applied to the contact portion with the movable frame side at either the first swing support point or the second swing support point.

  In the present invention, any of the first contact spring provided at each of the two first swing fulcrums and the second contact spring provided at each of the two second swing fulcrums However, it is preferable that the urging forces are equal. According to such a configuration, the movable body can be properly swung around the first rocking fulcrum, and the movable body can be rocked properly around the second rocking fulcrum.

  In the present invention, it is preferable that the first contact spring is provided on the fixed body side, and the second contact spring is provided on the movable body side. According to this configuration, the configuration can be simplified as compared to the case where the contact point spring is provided on the movable frame.

  In the present invention, the contact spring is plate-shaped, and is fixed to the fixing portion for fixing the contact spring, the extending portion extending from the fixing portion, and the fixing portion of the extending portion opposite to the fixing portion. A folded portion that is folded back toward the fixed body at an end on the side, and the contact portion is preferably provided in the folded portion. According to this configuration, the contact spring can be configured with a simple configuration.

  In the present invention, the contact spring is made of a material different from the first plate-like member, fixed to the fixed portion, the first plate-like member constituting the extension portion and the turn-up portion, and the turn-up portion. It is preferable that the contact part is comprised by the said 2nd plate-shaped member. According to such a configuration, the extending portion and the folded portion that exhibit the spring property in the contact spring can be configured from an appropriate material from the surface of the spring property, while the contact portion is from a surface such as slidability. It can be made of an appropriate material.

  In the present invention, a hole is formed in the folded portion, and the second plate-shaped member includes a flange portion that overlaps the folded portion, a convex portion that protrudes from the flange portion toward the hole, and fits in the hole. It is possible to adopt a configuration including

  In the present invention, the contact spring includes a first protrusion protruding from the one side in the optical axis direction of the movable frame toward the one side in the optical axis direction of the movable frame, It is preferable that a second convex portion protruding from the other side of the optical axis direction with respect to the contact portion toward the other side of the movable frame in the optical axis direction is formed. According to such a configuration, since the movable range of the movable frame in the optical axis direction is limited, problems such as the contact portion with the movable frame side coming off due to vibration transmitted from the outside are unlikely to occur.

  In the present invention, the fixed body includes a cover on one side in the optical axis direction with respect to the movable body, and the first swing fulcrum is configured between the cover and the movable frame. preferable. According to this configuration, the gimbal mechanism can be configured with a small number of members.

  In the present invention, the cover is formed with a cover side through portion that projects the fixing portion of the first contact spring to one side in the optical axis direction, and the fixing portion of the first contact spring is: A configuration in which the cover is fixed to overlap with one side in the optical axis direction can be employed.

  In the present invention, the movable body is formed with a movable body side penetrating portion that projects the fixed portion of the second contact spring to the other side in the optical axis direction, and the fixed portion of the second contact spring is It is possible to adopt a configuration in which the movable body is fixed to overlap with the other side of the optical axis direction.

  In the present invention, it is preferable that the second contact spring includes a spring portion that protrudes from the fixed portion of the second contact spring and elastically overlaps the movable body in the radial direction. According to this configuration, the radial position of the second contact spring can be defined by the spring portion.

  In the present invention, the movable frame includes four corners, the first swing fulcrum is configured at two corners located diagonally to the four corners, and the other two corners A configuration in which the second swing fulcrum is configured can be employed.

  In the present invention, it is preferable that the movable frame is elastically deformable in a direction orthogonal to the optical axis direction. According to such a configuration, a load can be applied to the contact portion by the spring force of the movable frame.

In this case, the natural frequency in the optical axis direction of the combined elastic force of the elastic force of the movable frame and the elastic force of the contact spring is set to fa, and the direction of the combined elastic force is orthogonal to the optical axis direction. When the natural frequency of f is fb and the maximum frequency of the disturbance frequency band is fc,
The frequencies fa, fb, and fc have the following relationship: fc <fa <fb
It is preferable to satisfy. According to this configuration, vibration due to disturbance can be suppressed.

In the present invention, the drive mechanism is a magnetic drive mechanism,
The movable frame and the contact spring are preferably made of a nonmagnetic material. According to this configuration, it is possible to prevent the movable frame and the contact spring from having a magnetic effect on the drive mechanism (magnetic drive mechanism).

  In the present invention, at least one of the first swing fulcrum and the second swing fulcrum of the gimbal mechanism is provided with a contact spring for applying an elastic load to the contact portion with the movable frame side. Therefore, an appropriate load can be applied to the contact portion with the movable frame side at the swing fulcrum by the contact spring. Therefore, the swing fulcrum can be smoothly swung to one side and the other side, and unnecessary vibration of the movable body due to vibration transmitted from the outside can be suppressed.

It is explanatory drawing which shows typically a mode that the optical unit with a shake correction function to which this invention is applied was mounted in optical apparatuses, such as a mobile telephone. It is explanatory drawing which looked at the optical unit with a shake correction function to which the present invention is applied from the subject side. It is YZ sectional drawing of the optical unit to which this invention is applied. It is explanatory drawing of the drive mechanism of the optical unit to which this invention is applied. It is the disassembled perspective view which looked at the mode that the movable body of the optical unit to which this invention was applied was decomposed | disassembled from the to-be-photographed object side. It is explanatory drawing which looked at the principal part of the optical unit to which this invention was applied from the to-be-photographed object side. It is the disassembled perspective view which looked at a mode that the principal part of the optical unit to which the present invention was applied further finely disassembled from the subject side. It is explanatory drawing which looked at the principal part of the optical unit to which the present invention is applied from the side opposite to the subject side. It is the disassembled perspective view which looked at the mode which further disassembled the principal part of the optical unit to which this invention was applied more finely from the subject side. It is explanatory drawing of the spring for contacts used for the optical unit which concerns on another embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, a configuration for preventing camera shake of a movable body for imaging (optical module) will be exemplified. In the following description, the three directions orthogonal to each other are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, and the direction along the optical axis L (lens optical axis / optical axis of the optical element) is defined as the Z-axis direction. . Further, in the following description, among the shakes in each direction, rotation around the X axis corresponds to so-called pitching (pitch), rotation around the Y axis corresponds to so-called yawing (roll), and Z axis The rotation around corresponds to so-called rolling. Also, + X is attached to one side in the X axis direction, -X is attached to the other side, + Y is attached to one side in the Y axis direction, -Y is attached to the other side, and Z axis One side of the direction (subject side / front side in the optical axis direction) is denoted by + Z, and the other side (opposite side of the subject side / back side in the optical axis direction) is denoted by -Z.

(Overall configuration of optical unit for shooting)
FIG. 1 is an explanatory view schematically showing a state in which an optical unit with a shake correction function to which the present invention is applied is mounted on an optical device such as a mobile phone.

  An optical unit 100 (an optical unit with a shake correction function) shown in FIG. 1 is a thin camera used in an optical device 1000 such as a mobile phone with a camera, and is supported by a chassis 2000 (device body) of the optical device 1000. It is mounted with. In such an optical unit 100, when a shake such as a hand shake occurs in the optical apparatus 1000 during shooting, the captured image is disturbed. Therefore, as will be described later, the optical unit 100 according to the present embodiment supports the movable body 10 including the movable body 10 having the optical axis L extending along the Z-axis direction so as to be swingable within the fixed body 20. In addition, a drive mechanism (not shown in FIG. 1) for swinging the movable body 10 is provided based on the result of detecting hand shake by a gyroscope (shake detection sensor) mounted on the optical unit 100. In the optical unit 100, flexible wiring boards 1800 and 1900 for feeding power to the movable body 10 and the driving mechanism are drawn out. The flexible wiring boards 1800 and 1900 are provided on the main body side of the optical device 1000. It is electrically connected to an upper control unit or the like. In the movable body 10, the movable body 10 includes a lens 1a having an optical axis L extending along the Z-axis direction as an optical element. In this embodiment, when viewed from the direction of the optical axis L, the lens 1a is circular, but the movable body 10 and the fixed body 20 are rectangular.

(Schematic configuration of the optical unit 100)
FIG. 2 is an explanatory view of the optical unit 100 with a shake correction function to which the present invention is applied as viewed from the subject side (one side in the Z-axis direction + Z). FIGS. 2 (a) and 2 (b) are optical units 100. 2 is a perspective view of the optical unit 100 viewed from the subject side, and an exploded perspective view of the optical unit 100. FIG. FIG. 3 is a YZ sectional view of the optical unit 100 to which the present invention is applied.

2 and 3, the optical unit 100 of this embodiment includes a fixed body 20, a movable body 10 (optical module), and a gimbal in which the movable body 10 is supported so as to be swingable with respect to the fixed body 20. A mechanism 30 and a drive mechanism 50 that generates a magnetic drive force that relatively displaces the movable body 10 relative to the fixed body 20 between the movable body 10 and the fixed body 20 are provided. Further, the fixed body 20 and the movable body 10 are connected by a plate spring 70. In the optical unit 100, as shown in FIG. 2, the movable body 10 is supported so as to be swingable around the first axis R1 intersecting the optical axis L direction with respect to the fixed body 20 via the gimbal mechanism 30. And is supported so as to be swingable around a second axis R2 intersecting the optical axis L direction and the first axis R1 direction. In the present embodiment, the first axis R1 and the second axis R2 are orthogonal to the optical axis L direction. The fixed body 20 is square when viewed from the optical axis L direction. Therefore, the first axis R1 and the second axis R2 are orthogonal to each other.

(Configuration of fixed body 20)
As shown in FIGS. 2 and 3, the fixed body 20 includes a rectangular first case 210. The first case 210 includes a rectangular tubular body 211 surrounding the movable body 10 and a rectangular frame-shaped end plate projecting radially inward from the Z-axis one side + Z end of the body 211. 212, and a rectangular window 212a is formed in the end plate portion 212. The fixed body 20 includes a cover 220 fixed to one side + Z in the Z-axis direction of the first case 210 and a sheet-like cushion member 230 fixed to the other side −Z of the cover 220 in the Z-axis direction. Have. The cushion member 230 is formed in a rectangular frame shape, and is disposed along the outer peripheral edge of the cover 220.

  The cover 220 is a plate-like member that overlaps the end plate portion 212 of the first case 210, and a circular opening 221 is formed at the center. In this embodiment, the surface on the one side + Z in the Z-axis direction of the cover 220 is used as the cover-side reference surface 228 orthogonal to the optical axis L direction.

  The cover 220 is fixed to the first case 210 so as to overlap the end plate portion 212 of the first case 210. The cushion member 230 is fixed to the cover 220 with an adhesive tape or the like so as not to overlap the end plate portion 212 of the first case 210. The fixed body 20 includes a rectangular frame-shaped stopper member 240 and a second case fixed to the first case 210 by welding or the like with the stopper member 240 sandwiched between the body 211 of the first case 210. 250 and a bottom plate 260 fixed to the second case 250 in a state of being overlapped with the other side -Z of the second case 250 in the Z-axis direction. The second case 250 has a rectangular bottom plate portion 251 and a rectangular tube-shaped body portion 255 extending from the bottom plate portion 251 to one side + Z in the Z-axis direction. The bottom plate portion 251 has an opening 252. Is formed. In the stopper member 240, the portion located on the inner peripheral side overlaps the holder 40 of the movable body 10 on the other side −Z in the Z-axis direction. Further, in the stopper member 240, an overhanging portion 241 that protrudes outward is formed on the outer peripheral edge of each side. For this reason, when the first case 210 is stacked on the second case 250 in the Z-axis direction, the overhanging portion 241 of the stopper member 240 is between the body portion 211 of the first case 210 and the body portion 255 of the second case 250. Retained.

(Configuration of drive mechanism 50)
4A and 4B are explanatory views of the drive mechanism 50 of the optical unit 100 to which the present invention is applied. FIGS. 4A and 4B are exploded perspective views of the drive mechanism 50 and the drive mechanism 50 in further detail. It is a disassembled perspective view.

As shown in FIGS. 2, 3, and 4, the movable body 10 includes a lens holder 11 (see FIG. 3) that holds the lens 1 a and the like, a holder 40 that holds the lens holder 11 inside, and a Z of the holder 40. And a cylindrical weight 12 fixed to one side + Z in the axial direction. The weight 12 adjusts the position of the center of gravity of the movable body 10 in the Z-axis direction. Here, the lens holder 11 may directly hold the lens 1a and the like, and may hold the focusing drive mechanism and the like together with the lens 1a. The weight 12 is made of a nonmagnetic metal, and is made of, for example, brass. For this reason, no magnetic attractive force is generated between the weight 12 and the magnet 52. When the light reflected from the weight 12 enters the movable body 10 when the light is taken into the movable body 10 from the front side in the optical axis L direction, the light becomes stray light and deteriorates the quality of the image. Therefore,
In this embodiment, at least an edge of one side + Z in the Z-axis direction of the weight 12 is subjected to an antireflection treatment such as black paint.

  In this embodiment, the drive mechanism 50 is configured between the holder 40 and the first case 210. More specifically, the drive mechanism 50 is a magnetic drive mechanism using a plate-like magnet 52 and a coil 56. The coil 56 is an air-core coil, and one side of the movable body 10 (holder 40) in the X-axis direction + X, the other side in the X-axis direction -X, one side in the Y-axis direction + Y, and the other side in the Y-axis direction. -Y is held. Further, the magnet 52 includes an inner surface of the side plate portion 216 located on one side + X in the X-axis direction, an inner surface of the side plate portion 217 located on the other side −X in the X-axis direction, It is held on the inner surface of the side plate portion 218 located on one side + Y in the axial direction and on the inner surface of the side plate portion 219 located on the other side -Y in the Y axis direction. Therefore, between the holder 40 and the body 211 of the first case 210, one side + X in the X-axis direction, the other side X in the X-axis direction, one side Y in the Y-axis direction, and the other side in the Y-axis direction. In any of -Y, the magnet 52 and the coil 56 are opposed to each other.

  In this embodiment, the magnet 52 is magnetized with different poles on the outer surface side and the inner surface side. The magnet 52 is divided into two in the direction of the optical axis L, and the magnetic pole located on the coil 56 side is magnetized so as to be different in the direction of the optical axis L. For this reason, as for the coil 56, an upper and lower long side part is utilized as an effective side. The four magnets 52 have the same magnetization pattern on the outer surface side and the inner surface side. For this reason, since the magnets 52 adjacent in the circumferential direction do not attract each other, assembly and the like are easy. The first case 210 is made of a magnetic material and functions as a yoke for the magnet 52.

(Configuration of movable body 10)
FIG. 5 is an exploded perspective view of the state in which the movable body 10 of the optical unit 100 to which the present invention is applied is disassembled, as viewed from the subject side (one side in the Z-axis direction + Z).

  As shown in FIGS. 3 and 5, in the movable body 10, an image sensor 1 b is arranged inside the holder 40, and the image sensor 1 b is a first mounting portion 1810 of a flexible wiring board 1800 for signal output. It is mounted directly or via a mounting board. The flexible printed circuit board 1800 includes a bending portion 1820 that curves toward the rear side in the optical axis L direction (the other side in the Z-axis direction -Z) at the other end -Y end in the Y-axis direction of the first mounting portion 1810. The second mounting portion 1830 has a rectangular shape that is connected to the curved portion 1820 at the other side -Y in the Y-axis direction, and a routing portion 1840 that is routed to the outside from the second mounting portion 1830. In the flexible wiring board 1800, the reinforcing plate 15 is sandwiched between the first mounting portion 1810 and the second mounting portion 1830. An electronic component 14 such as a gyroscope 13 or a capacitor is mounted on the surface of the second mounting portion 1830 facing the other side −Z in the Z-axis direction.

In this embodiment, the routing portion 1840 is divided in the X-axis direction by a slit 1850 extending in the Y-axis direction. The routing portion 1840 includes a first extending portion 1862 extending from one side + Y in the Y-axis direction to the other side −Y, and a rear side in the optical axis direction on the tip side of the first extending portion 1862 (the other in the Z-axis direction). A first bending portion 1863 that curves toward the side -Z), and a second extending portion 1864 that extends from the first bending portion 1863 toward the one side + Y in the Y-axis direction. In addition, the routing portion 1840 is a second bending portion 1866 that is bent toward the rear side in the optical axis direction (the other side in the Z-axis direction −Z) between the drawing portion from the movable body 10 and the first extending portion 1862. The first extending portion 1862 extends from the second bending portion 1866 in a state orthogonal to the optical axis L direction. The second extending portion 1864 is pulled out from the middle through the opening 252 of the bottom plate portion 251 of the second case 250, and the bottom plate portion is formed by a flexible sheet 19 (see FIG. 2) such as a double-sided tape. 251 is fixed. A portion of the second extending portion 1864 that is pulled out from the opening 252 of the bottom plate portion 251 of the second case 250 is covered with the bottom plate 260.

  In the movable body 10, a flexible wiring substrate 1900 for supplying power to the coil 56 is connected to the other side −Z end of the movable body 10 in the Z-axis direction. The flexible wiring board 1900 includes a rectangular frame portion 1910 extending along the outer edge of the holder 40 on the other side −Z in the Z-axis direction of the holder 40, and a strip-shaped lead portion 1940 extending from the rectangular frame portion 1910. And four coils 56 are connected to the rectangular frame portion 1910. The routing portion 1940 includes a first extending portion 1962 extending from one side + Y in the Y-axis direction to the other side −Y, and a rear side in the optical axis direction on the tip side of the first extending portion 1962 (the other in the Z-axis direction). A first bending portion 1963 that curves toward the side -Z), and a second extending portion 1964 that extends from the first bending portion 1963 toward the one side + Y in the Y-axis direction. Further, the routing portion 1940 is a second bending portion 1966 that is bent toward the rear side in the optical axis direction (the other side in the Z-axis direction −Z) between the drawing portion from the movable body 10 and the first extending portion 1862. The first extending portion 1962 extends from the second bending portion 1966 in a state orthogonal to the optical axis L direction.

  The second extending portion 1964 is drawn from the middle through the opening 252 of the bottom plate portion 251 of the second case 250 and is fixed to the bottom plate portion 251 by a flexible sheet 19 such as a double-sided tape. Yes. In addition, a portion of the second extending portion 1964 that is pulled out from the opening 252 of the bottom plate portion 251 of the second case 250 is covered with the bottom plate 260.

  A plate-like spacer 18 is fixed to the surface of the second mounting portion 1830 facing the other side −Z in the Z-axis direction with an adhesive. The spacer 18 is a substantially rectangular plate material, and the gyroscope 13 and the electronic component 14 are located inside. In addition, a clamp member 190 is attached to one end + Y end in the Y-axis direction of the spacer 18, and the clamp member 190 connects the first extending portions 1862 and 1962 to the spacer 18 via the elastic sheet 195. Hold between.

(Detailed configuration of holder 40)
FIGS. 6A and 6B are explanatory views of the main part of the optical unit 100 to which the present invention is applied as viewed from the subject side (one side in the Z-axis direction + Z). FIGS. 6A and 6B show the cover 220 and the holder 40. 2 is a perspective view showing a state where the two are connected via the gimbal mechanism 30 and the plate spring 70, and an exploded perspective view showing a state where the cover 220 and the holder 40 are separated. FIG. 7 is an exploded perspective view of a state in which the main part of the optical unit 100 to which the present invention is applied is further disassembled as seen from the subject side (one side in the Z-axis direction + Z). FIG. 8 is an explanatory view of the main part of the optical unit 100 to which the present invention is applied as viewed from the side opposite to the subject side (the other side in the Z-axis direction—Z), and FIGS. FIG. 4 is a perspective view showing a state where the cover 220 and the holder 40 are connected via the gimbal mechanism 30 and the plate spring 70, and an exploded perspective view showing a state where the cover 220 and the holder 40 are separated. FIG. 9 is an exploded perspective view of a state in which the main part of the optical unit 100 to which the present invention is applied is further disassembled as seen from the side opposite to the subject side (the other side in the Z-axis direction—Z). In addition, although the cushion member 230 is arrange | positioned between the movable body 10 and the cover 220, illustration of the cushion member 230 is abbreviate | omitted in FIGS.

  As shown in FIGS. 6 and 8, in the movable body 10, the holder 40 constitutes an outer peripheral portion of the movable body 10, and generally has a thick base portion 42 and one of the base portions 42 in the Z-axis direction. On the side + Z, it has a cylindrical portion 41 that holds the lens holder 11 shown in FIG. 3 inside.

As shown in FIGS. 7 and 9, in the base portion 42 of the holder 40, a side plate portion 45 is formed on the radially outer side of the cylindrical portion 41 so as to surround the cylindrical portion 41. A space in which the movable frame 39 of the gimbal mechanism 30 is disposed is formed between the space 41 and the space 41. The side plate portion 45 is formed with a notch 451 at the center in any one of the X-axis direction + X, the X-axis direction other side -X, the Y-axis direction one side + Y, and the Y-axis direction other side -Y. Has been
It does not interfere with the movable frame 39. The side plate portion 45 is also formed with notches 452 at the corners.

  As shown in FIG. 3, a coil holding portion 44 composed of two convex portions is formed on the radially outer surface of the side plate portion 45, and adhesion or the like is performed with the coil 56 fitted in the coil holding portion 44. Thus, the coil 56 is held by the holder 40. In this state, the coil holding portion 44 partially protrudes from the outer surface of the coil 56 (surface facing the magnet 52) and faces the magnet 52. Therefore, when the movable body 10 is displaced in the X-axis direction or the Y-axis direction by an external force, the coil holding portion 44 abuts on the magnet 52 and restricts its movable range. Thus, between the fixed body 20 and the movable body 10, the stopper 9 a that restricts the movable range in the direction orthogonal to the optical axis L direction of the movable body 10 by the coil holding portion 44 and the magnet 52. It is configured.

  7 and 9 again, in the holder 40, on the other side -Z in the Z-axis direction, two holder-side reference surfaces 481 orthogonal to the optical axis L direction are formed on both sides in the Y-axis direction.

  In addition, in the holder 40, holder-side through portions 47 that penetrate the base portion 42 in the Z-axis direction are formed at two locations that are spaced apart in the second axis R2 direction across the cylindrical portion 41. In addition, a stepped portion 43 that is located on one side + Z in the Z-axis direction from the holder-side reference surface 481 is formed at a position adjacent to the holder-side reference surface 481 on the other side −Z of the holder 40 in the Z-axis direction. .

(Configuration of convex portion for fixing plate spring 70)
In the holder 40, on the end surface of the cylindrical portion 41 on the one side + Z in the Z direction, adhesive convex portions 49 protruding to the one side + Z in the Z direction are formed at a plurality of locations in the circumferential direction. In this embodiment, the adhesive convex portions 49 are arranged in four places: one side + X in the X-axis direction, the other side -X in the X-axis direction, one side + Y in the Y-axis direction, and the other side -Y in the Y-axis direction. They are formed at equiangular intervals. Here, the cylindrical weight 12 is fixed to one side + Z end surface of the cylindrical portion 41 in the Z direction, and the dimension of the weight 12 in the Z-axis direction is the protruding dimension of the bonding convex portion 49 in the Z-axis direction. Is greater. However, the outer diameter of the weight 12 is smaller than the outer diameter of the cylindrical portion 41, and a groove 120 extending in the Z direction is formed at a position overlapping the bonding convex portion 49. Therefore, a portion corresponding to about ½ of the side surface 490 facing the direction intersecting with the optical axis L direction in the bonding convex portion 49 protrudes radially outward from the outer peripheral surface of the weight 12.

(Configuration of first convex portions 461 and 462 for stopper and stoppers 9b and 9c)
In the holder 40, the X-axis direction is one side + X, the X-axis direction is the other side −X, the Y-axis direction is one side + Y, and the Y-axis direction is the other side −Y. A first convex portion 461 for a stopper projecting toward one side + Z in the Z-axis direction is formed on an edge adjacent to the notch 451 at one end + Z end in the Z-axis direction of the two side plate portions 45. Yes. For this reason, the holder 40 has a notch 451 in any one of the X-axis direction one side + X, the X-axis direction other side −X, the Y-axis direction one side + Y, and the Y-axis direction other side −Y. Two first convex portions 461 for stopper are formed on both sides of the sheet. In addition, a stopper first convex portion 462 is also formed at an edge adjacent to the notch 452 at the end on one side + Z in the Z-axis direction of the side plate portion 45. The stopper first convex portion 462 protrudes only to a position lower than the stopper first convex portion 461. However, when the movable body 10 rotates around the first axis R1 or the second axis R2, the stopper first convex portion 462 protrudes. Both the 1 convex part 461 and 462 contact | abut to the cushion member 230, and the rocking | fluctuation range of the movable body 10 is controlled. Thus, between the fixed body 20 and the movable body 10, the stopper 9 b (see FIG. 3) that restricts the swing range of the movable body 10 by the stopper first convex portions 461 and 462 and the cushion member 230. ) Is configured.

Further, when the movable body 10 is displaced to one side + Z in the Z-axis direction by an external force, the stopper first convex portion 461 contacts the cushion member 230 and restricts its movable range. Therefore, between the fixed body 20 and the movable body 10, the stopper 9 c (the first convex portion 461 for the stopper and the cushion member 230 restricts the movable range to the one side + Z in the Z-axis direction of the movable body 10. (See FIG. 3).

(Configuration of stopper second convex portion 466 and stopper 9d)
On the other side −Z in the Z-axis direction of the holder 40, stopper second convex portions 466 that protrude toward the other side −Z in the Z-axis direction are formed on both end surfaces 482 in the X-axis direction. In this embodiment, the stopper second convex portion 466 is formed at a position overlapping the stopper first convex portion 461 in the Z-axis direction. Accordingly, the holder 40 is provided with two second stopper protrusions 466 that are spaced apart in the Y-axis direction on one side + X in the X-axis direction and on the other side −X in the X-axis direction. Here, the stopper second convex portion 466 overlaps the stopper member 240 shown in FIGS. 2 and 4 in the Z-axis direction. Accordingly, when the movable body 10 is displaced to the other side −Z in the Z-axis direction by an external force, the stopper second convex portion 466 contacts the stopper member 240 and restricts the movable range thereof. In this way, between the fixed body 20 and the movable body 10, the second convex portion 466 for stopper and the stopper member 240 cause one side of the movable body 10 in the optical axis L direction (the other side in the Z-axis direction). A stopper 9d (see FIG. 3) that restricts the movable range to -Z) is configured.

(Detailed configuration of cover 220)
The cover 220 is a resin molded product having a substantially rectangular planar shape. The cover 220 has an outer peripheral end portion that is a thin portion 229 and overlaps the body portion 211 of the first case 210 shown in FIG. In the cover 220, cover-side through-holes 222 are formed at two locations where the opening 221 is sandwiched on both sides in the first axis R1 direction, and through-portions 223 are formed at two locations where the opening 221 is sandwiched on both sides in the second axis R2 direction. Is formed.

  As shown in FIG. 2B, on one side + Z in the Z-axis direction of the cover 220, a portion adjacent to the cover-side through portion 222 on the radially outer side, and the cover-side through-portion 222 has a second axis. A portion adjacent in the R2 direction is a step portion 224 that is located on the other side −Z in the Z-axis direction from the surface on the one side + Z in the Z-axis direction of the cover 220.

  Further, as shown in FIG. 9, the surface of the cover 220 on the other side −Z in the Z-axis direction protrudes from between the cover-side through-hole 222 and the opening 221 toward the other side −Z in the Z-axis direction. The plate-shaped first contact support portion 225 is formed. The first contact support portion 225 is a support portion for a first contact spring 36 described later. In this embodiment, the first contact support part 225 protrudes from the position adjacent to the cover side through part 222 on the opening 221 side toward the other side −Z in the Z-axis direction. Of the two first contact support portions 225, the first contact support portion 225a located on one side in the direction of the first axis R1 has a width dimension larger on the distal end side 225d than on the proximal end side 225c. On the other hand, the first contact support portion 225b located on the other side in the direction of the first axis R1 has a width dimension smaller on the distal end side 225f than on the proximal end side 225e.

  On the other side -Z surface of the cover 220 in the Z-axis direction, the X-axis direction one side + X, the X-axis direction other side -X, the Y-axis direction one side + Y, and the Y-axis with respect to the opening 221 A spring support portion 226 that protrudes toward the other side −Z in the Z-axis direction is formed at a position spaced apart from the other side −Y in the direction. Further, an adhesive convex portion 227 that protrudes from the front end surface 226a toward the other side −Z in the Z-axis direction is formed on the front end surface 226a of the spring support portion 226 (the other side −Z surface in the Z-axis direction). ing. The spring support portion 226 is a support portion for a plate spring 70 described later.

(Configuration of gimbal mechanism 30)
As shown in FIGS. 6 and 8, in the optical unit 100 of the present embodiment, when the movable body 10 is swingably supported around the first axis R1 and the second axis R2, the cover 220 and the movable body of the fixed body 20 are supported. A gimbal mechanism 30 described below is formed between the ten holders 40.

  In this embodiment, when the gimbal mechanism 30 is configured, the movable frame 39 is provided between the cover 220 and the holder 40. In addition, the first swing fulcrum 31 is provided between the movable frame 39 and the cover 220 at two locations separated in the first axis R1 direction, and between the movable frame 39 and the holder 40 in the second axis R2 direction. The second oscillating fulcrum 32 is provided at two points separated by.

  As shown in FIGS. 7 and 9, the movable frame 39 is a rectangular frame, and has a first corner portion 391, a second corner portion 392, a third corner portion 393, and a fourth corner portion 394 around the optical axis L. Between the first corner 391 and the second corner 392, between the second corner 392 and the third corner 393, between the third corner 393 and the fourth corner 394, and A first connecting portion 396, a second connecting portion 397, a third connecting portion 398 and a fourth connecting portion 399 are provided between the four corner portions 394 and the first corner portion 391. In the present embodiment, among the first corner portion 391, the second corner portion 392, the third corner portion 393, and the fourth corner portion 394, the second corner portion 392 and the fourth corner portion that form a diagonal in the first axis R1 direction. A first swing fulcrum 31 is provided at 394, and a second swing fulcrum 32 is provided at a first corner 391 and a third corner 393 that form a diagonal in the direction of the second axis R2.

  In this embodiment, the first connecting portion 396, the second connecting portion 397, the third connecting portion 398, and the fourth connecting portion 399 are meandering portions that are curved in the direction orthogonal to the extending direction and the Z-axis direction. Have. Therefore, the movable frame 39 can be elastically deformed in a direction orthogonal to the optical axis L direction.

  Here, a metal sphere 38 is fixed to the inside of the first corner portion 391, the second corner portion 392, the third corner portion 393, and the fourth corner portion 394 of the movable frame 39 by welding or the like. Reference numeral 38 constitutes a protrusion that faces a hemispherical convex surface radially inward.

(Configuration of contact spring)
As shown in FIGS. 7 and 9, in this embodiment, at least one of the first swing fulcrum 31 and the second swing fulcrum 32 has a contact portion (with a spherical body 38) on the movable frame 39 side. A contact spring for applying an elastic load to the contact portion) is provided. In this embodiment, the contact spring is provided as a first contact spring 36 at each of the two first swing fulcrums 31 and is provided as a second contact spring 37 at each of the two second swing fulcrums 32. Is provided. In this embodiment, the first contact spring 36 is provided on the cover 220 (the fixed body 20 side), and the second contact spring 37 is provided on the holder 40 (the movable body 10 side).

  The first contact spring 36 has a metal plate shape, a fixing portion 361 for fixing the first contact spring 36 to the cover 220, and from the fixing portion 361 toward the other side −Z in the Z-axis direction. The extending portion 362 that extends, and the end of the extending portion 362 opposite to the fixing portion 361 (the other side in the Z-axis direction—the end of Z) are the fixed portions 361 (one side in the Z-axis direction + Z). And a sphere 38 fixed to the movable frame 39 on the inner side of the second corner portion 392 and the fourth corner portion 394 of the movable frame 39. A concave contact portion 365 for receiving is provided. In this embodiment, the contact portion 365 is a hemispherical recess. In the first contact spring 36, the extending portion 362 and the U-shaped bent portion between the extending portion 362 and the folded portion 363 apply an elastic load to the contact portion 365 on the movable frame 39 side. Demonstrates springiness to be applied.

In this embodiment, the fixing portion 361 is bent at a right angle with respect to the extending portion 362. The first contact spring 36 configured as described above is configured such that the fixing portion 361 is inserted into the step portion 224 at one side + Z in the Z-axis direction by inserting the extending portion 362 into the cover side through portion 222 formed in the cover 220. Overlap, the step 224 and the fixing part 361 are fixed. In this state, the fixing portion 36 of the extending portion 362
The base side located on the 1 side is supported from the inside in the radial direction by the first contact support portion 225 protruding from the cover 220 to the other side −Z in the Z direction. The first contact spring 36 may be fixed by adhesion. Further, the first contact spring 36 and the cover 220 may be integrated by insert molding.

  Here, the folded portion 363 has one side in the optical axis L direction relative to the contact portion 365 (the other side in the Z axis direction -Z) to one side in the optical axis L direction of the movable frame 39 (the other side in the Z axis direction). Z) and a first convex portion 366 projecting in a direction orthogonal to the optical axis L direction, and the optical axis L direction of the movable frame 39 from the other side of the optical axis L direction with respect to the contact portion 365 (one side in the Z axis direction + Z). Are formed on the other side (one side in the Z-axis direction + Z) and projecting in a direction orthogonal to the optical axis L direction, and the movable frame 39 includes the first convex portion 366 and the second convex portion. It passes between the part 367. In the present embodiment, the first convex portion 366 and the second convex portion 367 are formed on only one side in the width direction of the folded portion 363, but may be formed on both sides in the width direction of the folded portion 363.

  The second contact spring 37 is a metal plate, and has a fixing portion 371 for fixing the second contact spring 37 to the holder 40, and extends from the fixing portion 371 toward one side + Z in the Z-axis direction. The extending portion 372 and the end portion of the extending portion 372 opposite to the fixing portion 371 (one side in the Z-axis direction + the end portion of Z) are fixed to the fixing portion 371 (the other side in the Z-axis direction −Z). And a folded portion 373 that is turned back. The folded portion 373 receives a sphere 38 that is fixed to the movable frame 39 inside the first corner portion 391 and the third corner portion 393 of the movable frame 39. A concave contact portion 375 is provided. In this embodiment, the contact portion 375 is a hemispherical recess. In the second contact spring 37, the extending portion 372 and the U-shaped bent portion between the extending portion 372 and the folded portion 373 apply an elastic load to the contact portion 375 on the movable frame 39 side. Demonstrates springiness to be applied.

  In this embodiment, the fixing portion 371 is bent at a right angle with respect to the extending portion 372. The second contact point spring 37 configured as described above is configured such that the extending portion 372 is inserted into the holder side through portion 47 formed in the holder 40, whereby the fixing portion 371 is connected to the step portion 43 on the other side in the Z-axis direction −Z. And the step portion 43 and the fixing portion 371 are fixed. In this state, the root side of the extending portion 372 located on the fixing portion 371 side is supported from the radially inner side by the second contact support portion 470 formed of the inner surface of the holder side through portion 47. The second contact spring 37 may be fixed by adhesion. Further, the second contact spring 37 and the holder 40 may be integrated by insert molding.

  Here, the folded portion 373 has one side in the optical axis L direction relative to the contact point portion 375 (the other side in the Z-axis direction -Z) to one side in the optical axis L direction of the movable frame 39 (the other side in the Z-axis direction). Z) and a first convex portion 376 protruding in a direction orthogonal to the optical axis L direction, and the optical axis L direction of the movable frame 39 from the other side of the optical axis L direction with respect to the contact point portion 375 (one side in the Z axis direction + Z). Are formed on the other side (one side in the Z-axis direction + Z) and projecting in a direction orthogonal to the optical axis L direction, and the movable frame 39 includes the first convex portion 376 and the second convex portion. It passes between the part 377. In the present embodiment, the first convex portion 376 and the second convex portion 377 are formed only on one side in the width direction of the folded portion 373, but may be formed on both sides in the width direction of the folded portion 373.

  In addition, an opening 378 is formed in the fixed portion 371, and the end of the fixed portion 371 opposite to the extending portion 372 is bent to one side + Z in the Z-axis direction to the holder side. A spring portion 379 is formed on the inner surface of the penetrating portion 47 to come into contact with the inner side in the radial direction. Accordingly, the extending portion 372 contacts the inner surface (second contact support portion 470) of the holder side penetrating portion 47 from the radially outer side, and the spring portion 379 contacts the inner surface of the holder side penetrating portion 47 from the radially inner side. Touch. As a result, the second contact spring 37 is positioned in the radial direction. Therefore, the radial position of the second contact spring 37 can be defined by the spring portion 379.

  In the gimbal mechanism 30 configured as described above, the biasing force of the first contact spring 36 used for each of the two first swing fulcrums 31 is equal, and the second swing support 32 used for each of the second swing fulcrums 32 is the same. The biasing force of the two-contact spring 37 is equal. The first contact spring 36 and the second contact spring 37 have the same urging force. In this embodiment, since the magnetic drive mechanism is used for the drive mechanism 50, the movable frame 39, the first contact spring 36, and the second contact spring 37 used in the gimbal mechanism 30 are all non-magnetic. Made of material.

  In this embodiment, the movable frame 39 is at the same height position as the coil holding portion 44 (the same position in the Z-axis direction). For this reason, the gimbal mechanism 30 is provided at a position overlapping the drive mechanism 50 when viewed from a direction orthogonal to the optical axis L direction. In particular, in this embodiment, the gimbal mechanism 30 is provided at a position overlapping the center of the drive mechanism 50 in the Z-axis direction when viewed from a direction orthogonal to the optical axis L direction.

In this way, with the gimbal mechanism 30 configured, the optical axis of the combined elastic force of the elastic force of the movable frame 39 and the elastic force of the contact springs (the first contact spring 36 and the second contact spring 37). The natural frequency in the L direction is fa, the natural frequency in the direction orthogonal to the optical axis L direction of the synthetic elastic force is fb, and the maximum frequency in the frequency band of disturbance (vibration transmitted from the outside) is fc. When
The frequencies fa, fb, and fc have the following relationship: fc <fa <fb
Meet. For this reason, the vibration by disturbance can be suppressed.

(Configuration of the plate spring 70)
The movable body 10 of this embodiment includes a plate spring 70 that is connected to the movable body 10 and the fixed body 20 and defines the posture of the movable body 10 when the drive mechanism 50 is in a stopped state. In this embodiment, the plate spring 70 is a spring member obtained by processing a metal plate into a predetermined shape, and includes a fixed body side connecting portion 71 connected to the fixed body 20 and a movable body side connecting portion 72 connected to the movable body 10. And a plate spring-like arm portion 73 for connecting the fixed body side connecting portion 71 and the movable body side connecting portion 72. In this embodiment, the number of the arm portions 73 is four, and extends from the fixed body side connecting portion 71 to the movable body side connecting portion 72 while being folded back from one side in the circumferential direction to the other side.

  Here, the fixed body side connecting portion 71 extends in the circumferential direction from one end portion of the arm portion 73, but four fixed body side connecting portions 71 are provided with a one-to-one relationship with the four arm portions 73. It is interrupted in the circumferential direction. In the present embodiment, the fixed body side connecting portion 71 is disposed at two locations that sandwich the optical axis L on both sides in the X-axis direction and at two locations that sandwich the optical axis L on both sides in the Y-axis direction. 31 and the second rocking fulcrum 32 are interrupted at the place where they are provided. Each of the four fixed body side connecting portions 71 is formed with a through portion 710 formed of a hole into which the bonding convex portion 227 formed on the spring support portion 226 of the cover 220 is fitted. Therefore, the adhesive convex portion 227 formed on the spring support portion 226 of the cover 220 is fitted into the through portion 710 of the fixed body side connecting portion 71, and the adhesive convex portion 227 and the fixed body side connecting portion 71 are fixed with an adhesive. Can do. In this embodiment, the penetrating portion 710 is formed at the root portion of the fixed body side connecting portion 71 that is connected to the arm portion 73.

The movable body side connecting portion 72 extends in the circumferential direction from the other end portion of the four arm portions 73 and is connected in an annular shape. Further, a penetrating portion 720 is formed at the inner edge of the movable body side connecting portion 72, which is a notch into which the bonding convex portion 49 of the holder 40 fits. In this embodiment, the penetrating portion 720 is formed at a total of four locations, two locations that sandwich the optical axis L on both sides in the X-axis direction and two locations that sandwich the optical axis L on both sides in the Y-axis direction. Accordingly, the adhesive convex portion 49 formed on the holder 40 is fitted into the penetrating portion 720 of the movable body side connecting portion 72, and in this state, the adhesive convex portion 49 and the movable body side connecting portion 72 can be fixed with an adhesive. it can. In this embodiment, the penetrating portion 720 is formed at the root portion of the movable body side connecting portion 72 that is connected to the arm portion 73.

(Configuration and basic operation of the drive mechanism 50, etc.)
In the optical unit 100 configured as described above, when the optical apparatus 1000 shown in FIG. 1 is shaken, the shake is detected by the gyroscope 13, and the control IC (not shown) controls the drive mechanism 50. That is, a drive current that cancels the shake detected by the gyroscope 13 is supplied to the coil 56. At that time, the current balance supplied to the four coils 56 is controlled. As a result, the movable body 10 swings around the first axis R1 and swings around the second axis R2, thereby correcting camera shake.

(Method for connecting plate springs 70)
In this embodiment, during the stop period in which the coil 56 is not energized in the drive mechanism 50, the posture of the movable body 10 is held by the plate spring 70 so that the optical axis L does not tilt with respect to the Z axis. Meanwhile, the plate spring 70 is in a state in which no urging force is applied to the movable body 10. In order to realize such a configuration, in the present embodiment, when the cover 220 and the holder 40 are connected via the plate spring 70 in the assembly process of the optical unit 100, the cover 220 is not deformed. And the holder 40 are connected to each other through a plate spring 70 with a predetermined positional relationship.

  More specifically, first, in the cover 220, the plate spring 70, and the adhesion portion (second connection portion), the spring support portion 226 of the cover 220 is inserted into the penetration portion 710 of the fixed body side connection portion 71 (second connection portion). The adhesive convex portion 227 is fitted, and in this state, the adhesive convex portion 227 and the fixed body side connecting portion 71 are fixed by an adhesive (second adhesive).

  Next, the relative position of the holder 40 and the plate spring 70 is adjusted so that the cover side reference surface 228 of the cover 220 and the holder side reference surface 481 of the holder 40 are parallel to each other.

  Next, the holder 40 and the plate spring 70 are connected in accordance with the position of the plate spring 70 in a state where the relative position between the cover 220 and the plate spring 70 is adjusted. That is, at the connection portion (first connection portion) between the holder 40 and the plate spring 70, the adhesive convex portion 49 of the holder 40 is fitted into the penetrating portion 720 of the movable body side connection portion 72 (first connection portion). The side surface in the thickness direction of the spring 70 (the inner peripheral side surface of the penetrating portion 720) and the side surface 490 of the bonding convex portion 49 of the holder 40 are fixed with an adhesive.

  Here, the curvature radius of the side surface 490 of the bonding convex portion 49 of the holder 40 is set to be smaller than the curvature radius of the penetrating portion 720 of the movable body side coupling portion 72 of the plate spring 70. Therefore, in the connection portion (first connection portion) between the holder 40 and the plate spring 70, a portion that overlaps in the direction intersecting the optical axis L direction around the bonding convex portion 49 and the penetrating portion 720, and the optical axis At least one of the overlapping portions in the L direction is separated. However, even in that case, the holder 40 and the plate spring are between the overlapping portion in the direction intersecting the optical axis L direction and the overlapping portion in the optical axis L direction around the bonding convex portion 49 and the penetrating portion 720. Since the adhesive for fixing 70 is filled, the holder 40 and the plate spring 70 can be fixed.

(Main effects of this form)
As described above, in the optical unit 100 of this embodiment, the first contact spring 36 and the second contact spring 37 are provided on the first swing support point 31 and the second swing support point 32 of the gimbal mechanism 30. Therefore, an appropriate load can be applied to the contact portion 365 in contact with the sphere 38 at the first swing fulcrum 31 and the contact portion 375 in contact with the sphere 38 at the second swing fulcrum 32. Therefore, the first swing fulcrum 31 and the second swing fulcrum 32 can be smoothly swung in both directions, and the movable body 10 can be vibrated unnecessarily due to vibrations transmitted from the outside. Can be suppressed.

  Further, since both the first contact spring 36 and the second contact spring 37 have the same biasing force, the movable body 10 can be properly swung around the first swing support point 31 and the second The movable body 10 can be appropriately swung around the rocking fulcrum 32.

  In addition, since the first contact spring 36 is provided on the fixed body 20 side and the second contact spring 37 is provided on the movable body 10 side, compared with the case where the contact spring is provided on the movable frame 39, The configuration can be simplified.

  Further, since the first contact spring 36 and the second contact spring 37 are plate-like, the contact spring can be configured with a simple configuration. The first contact spring 36 and the second contact spring 37 are provided with first convex portions 366 and 376 and second convex portions 367 and 377 located on both sides of the movable frame 39 in the optical axis L direction. Therefore, the movable range of the movable frame 39 in the optical axis direction is limited. Therefore, it is difficult for problems such as the contact portions 365 and 375 to be disconnected from the movable frame 39 due to vibrations transmitted from the outside.

  In this embodiment, since the first swing fulcrum 31 is configured between the cover 220 and the movable frame 39, the gimbal mechanism 30 can be configured with a small number of members.

  Further, the extending portion 362 of the first contact spring 36 passes through the cover side through portion 222, and the fixing portion 361 is fixed to the step portion 224 of the cover 220 so as to overlap from one side in the optical axis L direction. . For this reason, the first contact point spring 36 can be positioned in the position in the optical axis L direction or in the direction intersecting the optical axis L direction. Further, the extending portion 372 of the second contact spring 37 passes through the holder side through portion 47, and the fixing portion 371 is fixed to the stepped portion 43 of the holder 40 so as to overlap from the other side in the optical axis L direction. . For this reason, the second contact spring 37 can be positioned in the position in the optical axis L direction or in the direction intersecting the optical axis L direction.

In addition, since the movable frame 39 can be elastically deformed in a direction orthogonal to the optical axis L direction, a load can be applied to the contact portions 365 and 375 by the spring force of the movable frame 39. Further, vibration can be absorbed by elastic deformation of the movable frame 39. Further, by optimizing the natural frequency of the movable frame 39, the combined elastic force of the elastic force of the movable frame 39 and the elastic force of the contact point springs (the first contact point spring 36 and the second contact point spring 37). The natural frequency fa in the optical axis L direction and the natural frequency fb in the direction perpendicular to the optical axis L direction of the combined elastic force, and the maximum frequency fc in the frequency band of disturbance (vibration transmitted from the outside) are as follows: Fc <fa <fb
By doing so, vibration due to disturbance can be suppressed.

  The drive mechanism 50 is a magnetic drive mechanism, but the movable frame 39, the first contact spring 36, and the second contact spring 37 are made of a nonmagnetic material. It is possible to prevent the two-contact spring 37 from having a magnetic influence on the drive mechanism 50 (magnetic drive mechanism).

  Further, in this embodiment, the side surface 490 of the bonding convex portion 49 extending in the optical axis L direction in the holder 40 and the side surface of the plate spring 70 are bonded together by an adhesive, so that the plate spring for the cover 220 is There is an advantage that the posture range of 70 is wide. Further, since the plate-like spring 70 is formed with a through portion 720 into which the bonding convex portion 49 is fitted, the bonding range is wide. Therefore, the holder 40 and the plate spring 70 can be securely bonded.

  Further, in the plate-like spring 70, a root portion where the movable body side connecting portion 72 and the arm portion 73 are connected is fixed to the holder 40 with an adhesive. For this reason, even if the movable body side connecting portion 72 extends in the circumferential direction, only the arm portion 73 is elastically deformed, so that the movable body side connecting portion 72 is elastically deformed to apply a biasing force to the movable body 10. Application can be avoided.

  Further, in the plate-like spring 70, a root portion where the fixed body side connecting portion 71 and the arm portion 73 are connected is fixed to the cover 220 with an adhesive. For this reason, even if the fixed body side connecting portion 71 extends in the circumferential direction, only the arm portion 73 is elastically deformed, so that the fixed body side connecting portion 71 is elastically deformed and applies a biasing force to the movable body 10. Application can be avoided.

  Further, the connecting portion between the holder 40 on the movable body 10 side and the plate spring 70 and the connecting portion between the cover 220 on the fixed body 20 side and the plate spring 70 are at the same angular position with the optical axis L as the center. Is provided. For this reason, a sufficient space for providing the arm portion 73 can be secured.

[Another embodiment]
FIG. 10 is an explanatory diagram of a contact spring used in an optical unit 100 according to another embodiment of the present invention. FIGS. 10 (a), (b), (c), and (d) are first views. 3 is a perspective view of the contact spring 36, an exploded perspective view of the first contact spring 36, a perspective view of the second contact spring 37, and an exploded perspective view of the second contact spring 37. FIG.

  In the embodiment described above, the first contact spring 36 and the second contact spring 37 are both formed of one metal plate, but in the present embodiment, the first contact spring 36 and the second contact spring 37 are formed of two metal plates. More specifically, as shown in FIGS. 10A and 10B, the first contact spring 36 includes a first plate-like member 36 a that constitutes a fixed portion 361, an extending portion 362, and a folded portion 363. The second plate member 36b is fixed to the folded portion 363, and the first plate member 36a and the second plate member 36b are made of different materials. Here, a circular hole 363 a is formed in the folded portion 363. On the other hand, the second plate-like member 36b includes a flange portion 364a that overlaps the folded portion 363, and a hemispherical convex portion 364b that protrudes from the flange portion 364a toward the hole 363a, and the convex portion 364b is , Is fitted in the hole 363a. In the second plate-like member 36b, the opposite side of the convex portion 364b is a contact portion 365 recessed in a hemispherical shape. Further, the end portion 364c of the flange portion 364a on the fixed portion 361 side is bent at a right angle. Note that a reinforcing hole 362 a is formed in the extending portion 362.

  As shown in FIGS. 10C and 10D, the second contact point spring 37 includes a first plate-like member 37a that constitutes a fixed portion 371, an extending portion 372, and a folded portion 373, and a folded portion 373. The first plate member 37a and the second plate member 37b are made of different materials. Here, a circular hole 373 a is formed in the folded portion 373. On the other hand, the second plate-shaped member 37b includes a flange portion 374a that overlaps the folded portion 373, and a hemispherical convex portion 374b that protrudes from the flange portion 374a toward the hole 373a. , Is fitted in the hole 373a. In the second plate-shaped member 37b, the opposite side of the convex portion 374b is a contact portion 375 that is recessed in a hemispherical shape. Further, the end portion 374c on the fixed portion 371 side of the flange portion 374a is bent at a right angle.

  In such a configuration, the extending portions 362 and 372 and the folded portions 363 and 373 that exhibit the spring property can be made of an appropriate material from the viewpoint of the spring property, while the contact portions 365 and 375 are slid. It can be made of an appropriate material in terms of mobility.

[Another configuration example of the optical unit 100]
In the above embodiment, the example in which the present invention is applied to the optical unit 100 used in the camera-equipped mobile phone has been described. However, the present invention may be applied to the optical unit 100 used in a thin digital camera or the like.

  The optical unit 100 with a shake correction function to which the present invention is applied may be configured as an action camera or a wearable camera mounted on a helmet, bicycle, radio controlled helicopter, or the like. Such a camera is used for photographing in a situation in which a large shake occurs, but according to the present invention, since the shake can be corrected, a high-quality image can be obtained.

  In addition, the optical unit 100 with a shake correction function to which the present invention is applied is fixed in a device having vibration at regular intervals, such as a refrigerator, in addition to a mobile phone, a digital camera, etc. It can also be used for a service that can obtain information inside the refrigerator when going out, for example, when shopping. In such a service, since it is a camera system with a posture stabilization device, a stable image can be transmitted even if the refrigerator vibrates. Moreover, you may fix this apparatus to the device with which it wears when going to school, such as a child, a student's bag, a school bag, or a hat. In this case, when the surroundings are photographed at regular intervals and the image is transferred to a predetermined server, the guardian or the like can observe the image in a remote place to ensure the safety of the child. In such an application, a clear image can be taken even if there is vibration during movement without being aware of the camera. If a GPS is installed in addition to the camera module, the location of the target person can be acquired at the same time. In the event of an accident, the location and situation can be confirmed instantly.

  Furthermore, if the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front can be photographed in an automobile, it can be used as an in-vehicle monitoring device such as a drive recorder. In addition, the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front of the vehicle can be photographed, and peripheral images are automatically photographed at regular intervals and automatically transferred to a predetermined server. Also good. Further, by distributing this image in conjunction with traffic jam information such as a road traffic information communication system, the traffic jam status can be provided in more detail. According to such a service, it is possible to record the situation at the time of an accident or the like by an unintentional third party and use it for inspection of the situation as in the case of a drive recorder mounted on a car. In addition, a clear image can be acquired without being affected by the vibration of the automobile. In such an application, when the power is turned on, a command signal is output to the control unit, and shake control is started based on the command signal.

  Further, the optical unit 100 with a shake correction function to which the present invention is applied may be applied to shake correction of an optical device that emits light, such as a laser pointer, a portable or vehicle-mounted projection display device, or a direct-view display device. Good. Further, it may be used for observation without using an auxiliary fixing device such as a tripod for observation at a high magnification such as an astronomical telescope system or a binoculars system. In addition, by using a sniper rifle or a gun barrel such as a tank, the posture can be stabilized against vibration at the time of triggering, so that the accuracy of hitting can be improved.

10 .. Movable body, 11... Lens holder, 12... Weight, 120... Weight groove, 20... Fixed body, 30... Gimbal mechanism, 31. Oscillating fulcrum, 36... First contact spring, 36 a, 37 a .. first plate member, 36 b, 37 b... Second plate member, 37 .. second contact spring, 38. ..Moveable frame, 40..Holder 41..Cylinder part, 42..Base part, 44..Coil holding part, 45..Side plate part, 47..Holder side penetrating part, 49..Adhesive convex part , 50 .. Drive mechanism, 52 .. Magnet, 56 .. Coil, 70 .. Plate spring, 71 .. Fixed body side connecting part, 72 .. Movable body side connecting part, 73 .. Arm part, 100. Unit 210... First case 220.. Cover 222.. Cover side penetration part 225 First contact support portion, 227 .. Adhesive convex portion, 228 .. Cover side reference surface, 230 .. Cushion member, 240 .. Stopper member, 250 .. Second case, 260 .. Bottom plate, 361, 371 -Fixing part, 362, 372-Extension part, 363, 373-Folding part, 363a, 373a-Folding part hole, 364a, 374a-Flange part, 364b, 374b-Convex part, 365, 375 ..Contact portion, 366, 376 ..First convex portion, 367, 377 ..Second convex portion, 379 ..Spring portion, 391 ..First corner portion, 392 ..Second corner portion, 393 Third corner, 394 .. Fourth corner, 461, 462 .. First convex portion for stopper, 466 .. Second convex portion for stopper, 470 .. Second contact support portion, 481 .. Reference on holder side Surface, 490 .. side surface of adhesive convex part, 7 Penetration of 0 ... fixed body side connecting portion, the penetration portion 720 ... movable body side connection unit, 1000 ... optics, L ... light axis, R1 ... first axis, R2 ... second axis

Claims (16)

A movable body including an optical element;
Via the gimbal mechanism, the movable body is supported so as to be swingable around a first axis intersecting the optical axis direction, and supported so as to be swingable about the second axis intersecting the optical axis direction and the first axis. A fixed body to
A drive mechanism for driving the movable body around the first axis and the second axis;
Have
The gimbal mechanism includes a movable frame, first swing fulcrums provided at two positions spaced apart in the first axis direction between the movable frame and the fixed body, and the movable frame and the movable body. A second oscillating fulcrum provided at two locations spaced apart in the second axis direction between,
At least one of the first swing fulcrum and the second swing fulcrum is provided with a contact spring for applying an elastic load to a contact portion with the movable frame side. Optical unit with shake correction function.   The contact spring is provided as a first contact spring at each of the two first swing fulcrums, and is provided as a second contact spring at each of the two second swing fulcrums. The optical unit with a shake correction function according to claim 1.   The first contact spring provided at each of the two first swing fulcrums and the second contact spring provided at each of the two second swing fulcrums are both biasing forces. The optical unit with a shake correction function according to claim 2, wherein The first contact spring is provided on the fixed body side,
4. The optical unit with a shake correction function according to claim 2, wherein the second contact spring is provided on the movable body side. The contact spring is plate-shaped, a fixing portion for fixing the contact spring, an extending portion extending from the fixing portion, and an end of the extending portion opposite to the fixing portion. A folded portion folded toward the fixed body at the portion,
The optical unit with a shake correction function according to claim 4, wherein the contact portion is provided in the folded portion. The contact spring is a second plate made of a material different from the first plate-like member, fixed to the fixed portion, the first plate-like member constituting the extension portion and the turn-up portion, and the turn-up portion. A plate-like member,
The optical unit with a shake correction function according to claim 5, wherein the contact portion is configured by the second plate-like member. A hole is formed in the folded portion,
The said 2nd plate-shaped member is provided with the flange part which overlaps with the said folding | returning part, and the convex part which protruded toward the said hole from this flange part, and was fitted to the said hole, It is characterized by the above-mentioned. Optical unit with shake correction function as described.   The contact spring includes a first protrusion projecting from the one side in the optical axis direction with respect to the contact portion toward the one side in the optical axis direction of the movable frame, and the contact spring with respect to the contact portion. The second convex part which protrudes toward the other side of the optical axis direction of the movable frame from the other side of the optical axis direction is formed. Optical unit with shake correction function as described. The fixed body includes a cover on one side in the optical axis direction with respect to the movable body,
9. The optical unit with a shake correction function according to claim 5, wherein the first swing fulcrum is configured between the cover and the movable frame. The cover is formed with a cover-side through portion that projects the fixing portion of the first contact spring to one side in the optical axis direction.
The optical unit with a shake correction function according to claim 9, wherein the fixing portion of the first contact spring overlaps and is fixed to one side of the cover in the optical axis direction. The movable body is formed with a movable body side through portion that projects the fixed portion of the second contact spring to the other side in the optical axis direction.
11. The shake correction according to claim 5, wherein the fixed portion of the second contact spring is fixed so as to overlap the other side of the movable body in the optical axis direction. Optical unit with function.   The shake correction according to claim 11, wherein the second contact spring includes a spring portion that protrudes from the fixed portion of the second contact spring and elastically overlaps the movable body in a radial direction. Optical unit with function. The movable frame has four corners,
The first swing fulcrum is configured at two corners located diagonally to the four corners, and the second swing fulcrum is configured at the other two corners. Item 13. An optical unit with a shake correction function according to any one of Items 1 to 12.   The optical unit with a shake correction function according to claim 1, wherein the movable frame is elastically deformable in a direction orthogonal to the optical axis direction. The natural frequency in the optical axis direction of the combined elastic force of the elastic force of the movable frame and the elastic force of the contact spring is represented by fa.
The natural frequency of the synthetic elastic force in the direction orthogonal to the optical axis direction is fb,
When the maximum frequency in the disturbance frequency band is fc,
The frequencies fa, fb, and fc have the following relationship: fc <fa <fb
The optical unit with a shake correction function according to claim 14, wherein: The drive mechanism is a magnetic drive mechanism;
The optical unit with a shake correction function according to claim 1, wherein the movable frame and the contact spring are made of a nonmagnetic material.

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