CN115225804A

CN115225804A - Image sensor driving device, camera device, and electronic apparatus

Info

Publication number: CN115225804A
Application number: CN202111115947.3A
Authority: CN
Inventors: 浅川新六
Original assignee: New Shicoh Motor Co Ltd
Current assignee: New Shicoh Motor Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-10-21
Anticipated expiration: 2041-09-23
Also published as: CN115225804B

Abstract

The invention provides an image sensor driving device, a camera device and an electronic device, which reduce the shake of a rotating shaft caused by an FPC. An image sensor driving device (106) is provided with: a fixed part; a movable section that supports an image sensor (105) that receives incident light that has passed through a lens body (103), and that is rotatable relative to a fixed section about an axis of a rotation axis (P) that passes through a light-receiving surface (107) of the image sensor (105) and is orthogonal to the light-receiving surface (107); and a movable section circuit section (3). The circuit unit (3) for the movable section has: an FPC base (30) for a movable section, which extends parallel to the light receiving surface (107) and serves as a movable section; and a 1 st FPC extension portion (31) and a 2 nd FPC extension portion (32) which are led out from the base portion (30) of the FPC for the movable portion in the direction of the rotation axis (P) at base end portions (31P, 32P) which are point-symmetric with respect to the rotation axis (P).

Description

Image sensor driving device, camera device, and electronic apparatus

Technical Field

The present invention relates to an image sensor driving device, a camera device, and an electronic apparatus used for an electronic apparatus such as a smartphone.

Background

A camera device having a sensor shift shake correction function includes: a lens device is provided with a fixed portion having a lens device and a movable portion having an image sensor, the movable portion being rotated about an axis of an optical axis of the lens device in the fixed portion.

The image sensor driving device of the camera device disclosed in patent document 1 includes: a housing supporting a lens assembly; and a rotating member rotatably supported by the housing and to which the image sensor is fixed. In this camera device, an FPC (Flexible printed circuit) is connected to the image sensor.

Documents of the prior art

Patent literature

Patent document 1: U.S. patent application publication No. 2017/0171440

Disclosure of Invention

Problems to be solved by the invention

In the image sensor driving device disclosed in patent document 1, since the FPCs are led out from both the left and right sides of the image sensor, and are integrated into one, and led out to the outside in the radial direction of the rotation member orthogonal to the one, the load of the actuator for driving the rotation member by rotation of the FPCs becomes unbalanced, and there is a problem that the rotation shaft of the rotation member is shaken.

The invention aims to provide an image sensor driving device, a camera device and an electronic device which reduce the shake of a rotating shaft caused by an FPC (flexible printed circuit).

Means for solving the problems

In order to solve the above problem, an image sensor driving device according to a preferred embodiment of the present invention includes: a fixed part; a movable portion that supports an image sensor that receives incident light transmitted through a lens and is rotatable with respect to the fixed portion about an axis of a rotating shaft that passes through a light receiving surface of the image sensor and is orthogonal to the light receiving surface; and a movable portion circuit portion including: an FPC base for a movable portion extending parallel to the light receiving surface as the movable portion; and a 1 st FPC extension portion and a 2 nd FPC extension portion that are drawn out from the base portion of the FPC for the movable portion in the direction of the rotation axis at base end portions that are point-symmetric with respect to the rotation axis.

Further, the base end portion may be provided at an edge portion or inside of the rectangular base portion of the FPC for the movable portion as viewed from the direction of the rotation shaft.

The 1 st FPC extension portion and the 2 nd FPC extension portion may further extend in a direction parallel to the long side of the rectangular image sensor, and may be led out from the short side of the image sensor to the outside of the image sensor driving device.

The movable portion may have a rectangular plate member that fixes the FPC base for movement, the FPC base for movement fixes and electrically connects the image sensor, and the plate member may have a dimension in the short side direction that is the same as a dimension in the same direction of the image sensor.

Further, a notch portion through which the 1 st FPC extension portion or the 2 nd FPC extension portion passes may be provided at a position point-symmetrical with respect to the rotation axis on the long side of the plate material.

The 1 st FPC extension and the 2 nd FPC extension passing through the cutout may be folded back 180 degrees with the plate material interposed therebetween, and may be drawn out in the rotation axis direction at the base end portion.

The base end portion may be provided in the vicinity of the rotation shaft so as to extend in the direction of the short side.

In addition, the 1 st FPC extension portion and the 2 nd FPC extension portion that are drawn out may be bent in a direction parallel to the long side, and further folded at a folding portion by 180 degrees.

Further, the inside of the folded portion may be cured with a resin.

Further, the base end portion may be provided at an edge portion of the FPC base for the movable portion, and the 1 st FPC extension portion and the 2 nd FPC extension portion may extend along the edge portion of the FPC base for the movable portion.

The fixed portion may have a base for rotatably supporting the movable portion and a frame for forming an internal space, and the base may divide the internal space into an upper space for accommodating the base portion of the FPC for the movable portion and a lower space for accommodating the 1 st FPC extension portion and the 2 nd FPC extension portion.

The base may have a passage portion through which the 1 st FPC extension portion and the 2 nd FPC extension portion pass to move from the upper space to the lower space.

A camera device according to another preferred embodiment of the present invention includes the image sensor driving device.

An electronic device according to still another preferred embodiment of the present invention is an electronic device including: the camera device is provided.

Effects of the invention

An image sensor driving device according to the present invention includes: a fixed part; a movable portion that supports an image sensor that receives incident light that has passed through a lens, and that is rotatable with respect to the fixed portion about an axis of a rotation shaft that passes through a light-receiving surface of the image sensor and is orthogonal to the light-receiving surface; and a movable portion circuit portion having: an FPC base portion for a movable portion extending in parallel with the light receiving surface as the movable portion; and a 1 st FPC extension portion and a 2 nd FPC extension portion that are drawn out from the base portion of the FPC for the movable portion in the direction of the rotation shaft at base end portions that are point-symmetrical with respect to the rotation shaft. Since the 1 st FPC extension portion and the 2 nd FPC extension portion are drawn out in the direction of the rotation axis at the base end portions that are point-symmetric with respect to the rotation axis, reaction forces of the 1 st FPC extension portion and the 2 nd FPC extension portion generated by the rotation cancel each other on the rotation axis. Therefore, the shake of the rotation shaft due to the FPC can be reduced.

Drawings

Fig. 1 is a front view of a smartphone 109 equipped with a camera device 100 including an image sensor driving device 106 according to an embodiment of the present invention.

Fig. 2 is a perspective view of the prism 101 and the image sensor driving device 106 in fig. 1.

Fig. 3 is a perspective view of the image sensor driving device 106 of fig. 2.

Fig. 4 is a perspective view illustrating the image sensor driving device 106 of fig. 2 in an exploded manner.

Fig. 5 is a perspective view of the image sensor driving device 106 of fig. 3 with a housing removed.

Fig. 6 is a perspective view of the movable portion circuit portion 3 of fig. 4.

Fig. 7 is a perspective view of a movable portion circuit portion 3a which is a modification of the movable portion circuit portion 3.

Fig. 8 is a side view of a state where the movable part is supported with respect to the fixed part, as viewed from the-X side.

Fig. 9 is a perspective view of the fixing portion with the frame removed.

Detailed Description

As shown in fig. 1, a camera apparatus 100 including an image sensor driving apparatus 106 according to an embodiment of the present invention is housed in a housing of a smartphone 109. The camera apparatus 100 has a prism 101, a lens body 103, an image sensor 105, and an image sensor driving device 106 that drives the image sensor 105.

Next, the structure of each part of the present embodiment will be described on the assumption of an XYZ orthogonal coordinate system including X, Y, and Z axes orthogonal to each other. Here, the X axis is an axis in a direction in which incident light from the subject enters the smartphone 109, the Z axis is an axis in a direction orthogonal to the X axis and an axis in the optical axis direction of the lens body 103, and in the present embodiment, the X axis is a longitudinal direction of the housing of the smartphone 109. The Y axis is an axis in a direction orthogonal to the X axis and the Z axis.

As shown in fig. 2, incident light from the photographic subject enters the prism 101, and the optical axis is bent by 90 ° by the prism 101 and propagates in the + Z direction. The incident light in the + Z direction passes through the lens body 103 (not shown in fig. 2) and reaches the light receiving surface 107 of the image sensor 105 of the image sensor driving device 106. The image sensor 105 converts the light guided through the lens body 103 into an image signal and outputs the image signal. The image sensor driving device 106 drives the image sensor 105 around a virtual rotation axis P passing through the center of the light receiving surface 107 and perpendicular to the light receiving surface 107. The rotation axis P generally coincides with the optical axis (Z axis) of the lens body 103.

As shown in fig. 3 and 4, the image sensor driving device 106 includes an upper case 1, an imaging unit 2, a movable portion circuit unit 3, a plate member 4, 3 support balls 5, a plate spring 6, a base 7, a fixed portion circuit unit 8, and a lower case 9. Of these parts, the upper case 1 and the lower case 9 are combined into a housing that accommodates the imaging unit 2, the movable unit circuit unit 3, the plate 4, the 3 support balls 5, the plate spring 6, the base 7, and the fixed unit circuit unit 8.

In fig. 4, the upper case 1, the base 7, the circuit portion for fixing portion 8, and the lower case 9 constitute a fixing portion. The imaging unit 2, a part of the movable unit circuit unit 3, and the plate member 4 constitute a movable unit. The movable part is rotatable relative to the fixed part about a rotation axis P.

As shown in fig. 4, the upper case 1 has: a rectangular top plate 11 having an opening; and 4 side plates 12 extending from 4 edges of the top plate 11 in the + Z direction. The lower case 9 has a rectangular bottom plate 91 and 3 side plates 92 extending from 3 edges of the bottom plate 91 in the-Z direction. The top plate 11 and the bottom plate 91 have substantially the same size, and are shorter in the X direction and longer in the Y direction. That is, the size of the smartphone 109 in the thickness direction is small. Slits 121 extending in the Y direction are provided at both ends of the + X side plate 12 of the upper case 1 in the Y direction. Slits 921 extending in the Y direction are provided in both end portions and a central portion of the side plate 92 on the-X side of the lower case 9.

The imaging unit 2 includes: a sensor housing 21; a filter 22 fixed to the-Z side of the sensor housing 21; and an image sensor 105 fixed to the + Z side of the sensor housing 21. The light receiving surface 107 of the image sensor 105 is provided inside the sensor housing 21. The incident light that has passed through the lens body 103 passes through the filter 22 via the opening of the top plate 11 of the upper case 1, and is collected on the light receiving surface 107 of the image sensor 105. The movable section circuit section 3 is disposed on the + Z side of the image sensor 105. The movable portion circuit portion 3 includes a circuit for supplying power to the image sensor 105, a circuit for supplying a control signal to the image sensor 105, and a circuit for receiving an image signal from the image sensor 105.

As shown in fig. 4 to 6, the movable portion circuit portion 3 includes a movable portion FPC (Flexible printed circuit) base 30 connected to the image sensor 105, and a 1 st FPC extension 31 and a 2 nd FPC extension 32. The FPC base 30 for the movable portion in the circuit portion 3 for the movable portion is extended in parallel to the light receiving surface 107, fixed to the surface on the-Z side of the substantially rectangular plate material 4, and fixed to the imaging portion 2. The image sensor 105 of the imaging unit 2 is electrically connected to the flexible portion FPC base 30.

The 1 st FPC extension 31 is provided in a band shape on the + X side, is drawn out to the + X side from the vicinity of the center of the + X side of the movable portion FPC base 30, is bent 180 degrees in the + Z direction with the plate material 4 interposed therebetween, has a base end 31p as the + Y side end of the bent tip, and is bent 90 degrees here to draw a predetermined length in the + Z direction. The 1 st FPC extension 31 moves from the upper space to the lower space through a hole 78 of the base 7, which is a passage portion, and a notch 85 of the fixing circuit portion 8, which will be described later. Further, the leading end is bent by 90 degrees, extends in the + Y direction, is folded at the folded portion 31r, extends to the outside of the image sensor driving device 106 as shown in fig. 4, and is fixed to the side plate 12 on the-Y side of the upper case 1.

The 2 nd FPC extension portion 32 is provided in a band shape on the-X side, is led out from the movable portion FPC base 30, is bent at the base end portion 32p, is moved from the upper space to the lower space through a hole 79 of the base 7, which is a passage portion described later, and a notch portion 86 of the fixing circuit portion 8, is folded back at the folded-back portion 32r, and is provided so as to be point-symmetrical to the 1 st FPC extension portion 31. The folded 2 nd FPC extension 32 is folded again at the + Y direction end of the movable portion FPC base 30, extends to the outside of the image sensor driving device 106 as shown in fig. 3, and is fixed to the side plate 12 on the-Y side of the upper housing 1. The folded

portions

31r, 32r are preferably located near the Y-direction ends of the FPC base 30 for the movable portion.

The 1 st FPC extension 31 is led out from the FPC base for movable portion 30 so as to be housed in the notch portion 44a provided in the plate material 4, and the 2 nd FPC extension 32 is led out from the FPC base for movable portion 30 so as to be housed in the notch portion 44b. Further, the 1 st FPC extension 31 is fixed inside the fold 31r and the 2 nd FPC extension 32 is fixed inside the fold 32r by adhesives 31ra and 32ra, respectively.

In this way, in the present embodiment, since the 1 st FPC extension portion 31 and the 2 nd FPC extension portion 32 are drawn out in the + Z direction, which is the optical axis direction, from the surface on the + Z side of the movable portion FPC base 30, the projected area in the optical axis direction of the image sensor driving device 106 can be reduced.

In fig. 4, the plate member 4 is a rectangular metal plate smaller than the top plate 11. A center hole 45 is provided in the center of the plate 4, and the center of the center hole 45 is the position of the rotation axis P. In the + Z side face of the plate 4, a rotation center ball 43 is mounted in a center hole 45 at a position of the movable portion corresponding to the rotation axis P, and is fixed from the-Z side by welding. On the + Z side surface of the plate 4, 2

magnets

41a and 41b are fixed, which are aligned in the Y direction with the rotation center ball 43 interposed therebetween. The fixed positions of the

magnets

41a and 41b are point-symmetric with respect to the rotation axis P. In addition, in two corners of the + X + Y side and the + X-Y side out of the four corners of the plate material 4, the minute rectangular regions of the plate material 4 at the positions are bent to the + Z side to form the protruding portions 42. Further, a notch 44a is formed at the edge of the plate 4 on the + X side, and a notch 44b is formed at the edge on the-X side.

The base 7 is a metal plate having a substantially rectangular outer shape of substantially the same size as the top plate 11 and the bottom plate 91, and is an outsert molded product in which several portions protruding in the-Z direction are formed of resin on a surface on the-Z side described later. The base 7 has 3 protruding portions 721 protruding toward the + X side on the side of the + X side. Further, 3 protruding portions 722 protruding toward the-X side are provided on the side of the base 7 on the-X side. The protruding portions 721 at both ends are fitted and fixed in the slits 121 of the upper case 1, and the protruding portion 721 at the center is sandwiched and fixed between the side plate 12 of the upper case 1 and the side plate 92 of the lower case 9. The 3 protrusions 722 are fitted and fixed in the 3 slits 921 of the lower case 9. The internal space thus formed by the upper and lower housings 1 and 9 is divided into an upper space above and a lower space below from the base 7. A part of the 1 st FPC extension portion and the 2 nd FPC extension portion 32 is accommodated in the lower space. The upper space accommodates the movable portion.

In the surface of the base 7 on the-Z side, the ball receiving portion 71a is disposed so as to protrude in the-Z direction at the corner on the-X-Y side, and the ball receiving portion 71b is disposed so as to protrude in the-Z direction at the corner on the-X + Y side. The ball receiving portion 71c is disposed so as to protrude in the-Z direction near the center of the + X side edge portion. The

ball receiving portions

71a, 71b, 71c are respectively projected in a cylindrical shape whose bottom surface is higher than the other portions of the base 7, 3 of which have the same height and are planes parallel to the lower surface of the plate 4. In the

ball receiving portions

71a, 71b and 71c, 1 support ball 5 is accommodated, respectively. The support balls 5 are the same size and in this embodiment are smaller than the rotation center ball 43, but may be larger or the same size depending on the design. Each support ball 5 contacts the + Z side surface of the plate 4 and supports the movable portion.

In addition, in the surface of the base 7 on the-Z side, the 1 st support portion 72a is provided from the center of the edge portion on the-X side toward the position in the-Y direction, and the 2 nd support portion 72b is provided from the center of the edge portion on the + X side toward the position in the + Y direction. These 1 st support portion 72a and 2 nd support portion 72b are constituted by a cylindrical portion disposed on the surface of the base 7 on the-Z side and a small cylindrical portion projecting near the center of the upper surface of the cylindrical portion. A stopper 73 is disposed at the center of the surface of the base 7 on the-Z side. The stopper 73 has a recess surrounded by an annular side wall having 2 notches. Further, in the base 7, a hole 75 is provided on the-Y side, a hole 76 is provided on the + Y side, a hole 78 is provided on the + X side, and a hole 79 is provided on the-X side of the stopper 73.

The plate spring 6 reaches the 2 nd end 61b from the 1 st end 61a through the ball receiving portion 62 at the center, and is bent in a wave shape, and two zigzag portions are disposed in point symmetry about the ball receiving portion 62. The 1 st end 61a and the 2 nd end 61b are circular and have holes at their centers for receiving the small cylindrical portions of the 1 st support portion 72a and the 2 nd support portion 72b, respectively. The ball receiving portion 62 has a circular shape. In the present embodiment, the small cylindrical portions of the 1 st support portion 72a and the 2 nd support portion 72b are inserted into the holes of the 1 st end portion 61a and the 2 nd end portion 61b of the plate spring 6, and the plate spring 6 is supported by the 1 st support portion 72a and the 2 nd support portion 72b. In this state, the ball receiving portion 62 is accommodated in the recess of the stopper portion 73, and the zigzag portion extends from the cutout portion to the outside of the stopper portion 73. The ball receiving portion 62 has a ball receiving hole 63 at the center thereof for receiving the rotation center ball 43. The rotation axis P passes through the center of the ball receiving hole 63. The ball receiving hole 63 has a circular shape having a diameter smaller than that of the rotation center ball 43. Thus, the inner periphery of the ball receiving hole 63 supports the rotation center ball 43. Normally, the plate spring 6 and the rotation center ball 43 supported by it do not contact the stopper 73, and the stopper 73 functions as a ball receiving portion 62 that is stopped when an impact or the like is applied.

Further, on the surface on the-Z side of the base 7, of the four corners of the base 7, the corners on the + X-Y side and the + X + Y side, which are two corners where no ball receiving portion is provided, are provided with cylindrical resin reservoirs 77 for storing viscoelastic resin. The resin having viscoelasticity is a resin called a gel damping material. The two protrusions 42 of the plate material 4 are formed at positions facing these resin reservoirs 77, and are inserted into the viscoelastic resin in the resin reservoirs 77. When the movable portion is rotationally driven, the resin having viscoelasticity in the resin reservoir 77 functions as a damper for suppressing vibration of the movable portion via the protruding portion 42.

In the present embodiment, in order to rotatably support the plate 4, the

ball receiving portions

71a, 71b, and 71c and the 3 support balls 5 are provided in a substantially triangular region formed by the side on the-X side and the center portion on the + X side between the plate 4 and the base 7. The resin reservoir 77 that receives the projection 42 of a part of the bent plate material 4 is disposed at two corners on the + X side outside the region. As described above, in the present embodiment, since the structure for supporting and the structure for suppressing vibration are effectively arranged, the image sensor driving device 106 can be realized in a small size.

In the present embodiment, the plate member 4 and the base 7 are both rectangular, and the protruding portion 42 is formed at a corner of the plate member 4. As shown in fig. 5, the fold 42r of the projection 42 is parallel to the long side of the plate 4. When the movable portion is rotationally driven about the rotation axis P, the protrusion 42 of the viscoelastic resin inserted into the resin reservoir 77 moves in a direction perpendicular to the surface of the protrusion 42. Therefore, the area of the protrusion 42 receiving the reaction force from the viscoelastic resin is maximized. Thus, the gel damping material can maximize the effect of suppressing the vibration of the movable portion.

In fig. 4, the fixing portion circuit portion 8 has a substantially rectangular FPC base 89 for fixing portion smaller than the top plate 11 and a 3 rd FPC extension portion 88 drawn out from the FPC base 89 for fixing portion.

Coils

81a and 81b are fixed to the-Z side surface of the fixing portion FPC base 89 in parallel in the + Y direction. The

coils

81a and 81b are opposed to the

magnets

41a and 41b and are point-symmetric with respect to the rotation axis P of the movable portion. Further,

hall elements

82a and 82b for detecting the positions of the

magnets

41a and 41b are disposed inside the

coils

81a and 81b, respectively. Further, in the surface on the-Z side of the FPC base 89 for fixing portion, a control IC83 for controlling the

hall elements

82a and 82b is disposed outside the coil 81 a. Further, on the + Z side surface of the FPC base 89 for fixing portion, the

yokes

84a and 84b are fixed at positions corresponding to the

magnets

41a and 41b, respectively.

The hole 75 of the base 7 accommodates the coil 81a and the control IC83 on the FPC base 89 for the fixing portion, and the hole 76 accommodates the coil 81b on the circuit portion 8 for the fixing portion. The surface on the-Z side of the fixing portion FPC base 89 is fixed to the surface on the + Z side of the base 7. Thus, the

magnets

41a and 41b face the

coils

81a and 81b, the

hall elements

82a and 82b, and the

yokes

84a and 84b, respectively.

In the present embodiment, for example, when the N pole is on the + X side and the S pole is on the-X side in the + Z side surfaces of the

magnets

41a and 41b, the magnetic flux from the N pole of the

magnets

41a and 41b reaches the

yokes

84a and 84b through the linear portions of the

coils

81a and 81b extending in the Y direction on the + X side of the coils in the Y direction, and further reaches the S pole of the

magnets

41a and 41b through the linear portions of the

coils

81a and 81b on the-X side of the coils in the Y direction. In the present embodiment, the

magnets

41a and 41b and the

yokes

84a and 84b constitute the 1 st biasing portion, and the attractive force generated between the

magnets

41a and 41b and the

yokes

84a and 84b serves as a biasing force for pressing the movable portions against the fixed portions.

In the present embodiment, the

magnets

41a and 41b and the

coils

81a and 81b constitute a driving unit, and a current in the opposite direction is caused to flow through the

coils

81a and 81b to generate a torque around the rotation axis P, thereby rotationally driving the movable unit. More specifically, when a current flows through the coil 81a, a force for moving the coil 81a, for example, to the + X side is generated by the interaction between the current and the magnetic field generated by the magnet 41a, and the magnet 41a of the movable portion is driven to the-X side by the reaction force of the force. When a current in the opposite direction to the coil 81a flows through the coil 81b, a force for moving the coil 81b toward the-X side is generated by the interaction between the current and the magnetic field generated by the magnet 41b, and the magnet 41b of the movable portion is driven toward the + X side by the reaction force of the force. Thus, the movable portion having the

magnets

41a and 41b is rotationally driven around the rotation axis P. The control IC83 detects the positions of the

magnets

41a and 41b based on the voltages generated by the

hall elements

82a and 82b through the magnetic fields of the

magnets

41a and 41b, and controls the currents flowing through the

coils

81a and 81b.

The 3 rd FPC extension 88 extends from the-Y side end of the FPC base for fixing 89 to the outside of the image sensor driving device 106 as shown in fig. 3, is drawn out in the-Z direction, and is fixed to the side plate 12 on the-Y side of the upper housing 1. The 3 rd FPC extension portion 88 has a tip connected to an external device, and the 3 rd FPC extension portion 88 is provided with a circuit for supplying power from the external device to the

hall elements

82a and 82b and the control IC83, and a circuit for transmitting and receiving signals between the external device and the control IC 83. Further, a signal circuit from the

hall elements

82a and 82b to the control IC83 and a circuit for supplying power from the control IC83 to the

coils

81a and 81b are formed in the FPC base 89 for fixing portion.

The 2 holes 78 and 79 of the base 7 are long in the X direction, and constitute a passage portion through which a portion of the 1 st FPC extension 31 or the 2 nd FPC extension 32 drawn out in the + Z direction passes. The fixed-portion circuit portion 8 has a notch 85 at the center of the side on the + X side and a notch 86 at the center of the side on the-X side, and the notches 85 and 86 are long in the X direction and constitute a passage portion through which a portion of the 1 st FPC extension portion 31 or the 2 nd FPC extension portion 32 drawn out in the + Z direction passes. Further, the-Y direction end of the + X side has a notch 87 for passing the 1 st FPC extension 31. The holes 78, 70, notches 85, and 86, which are passage portions, may be formed of holes or notches, and have a size that does not interfere with the movement of the 1 st FPC extension 31 and the 2 nd FPC extension 32 when the movable portion rotates.

As shown in fig. 8 and 9, in the present embodiment, the plate material 4 as the movable portion is supported by the 3 support balls 5 accommodated in the

ball receiving portions

71a, 71b, and 71c of the base 7 as the fixed portion. The plate 4 is biased toward the base 7 by the attraction force between the magnet 41a and the yoke 84a and the attraction force between the magnet 41b and the yoke 84 b. Therefore, the light receiving surface 107 of the image sensor 105 as the movable portion is determined to be parallel to the plane formed by the upper end portions of the 3 support balls 5. The image sensor driving device 106 is adjusted so that the normal direction of the light receiving surface 107 coincides with the optical axis direction of the lens body 103.

On the other hand, in the present embodiment, a rotation center ball 43 as a fulcrum member is fixed to the surface of the plate 4 on the + Z side as the movable portion. Both ends of the plate spring 6 as the 2 nd biasing portion are fixed to the 1 st supporting portion 72a and the 2 nd supporting portion 72b of the base 7 as the fixing portion, and the spherical lower portion of the rotation center ball 43 contacts the inner peripheral edge of the ball receiving hole 63 of the ball receiving portion 62 in the center of the plate spring 6. The plate spring 6 is provided so as to deflect the ball receiving portion 62 to be positioned slightly on the + Z side than the 1 st support portion 72a and the 2 nd support portion 72b. That is, the rotation center ball 43 is biased to the-Z side by the plate spring 6. Thereby, a central axis connecting the center of the ball receiving hole 63 of the plate spring 6 and the center of the center hole 45 of the plate 4, that is, connecting the lower end and the upper end of the rotation center ball 43 becomes the rotation axis P.

Here, since the plate spring 6 is an elastic body and the ball receiving hole 63 has a circular shape, the plate spring 6 has a centering function of holding the center axis of the rotation center ball 43 at a predetermined position with respect to the base 7. Further, the biasing force generated by the attractive force between the

magnets

41a and 41b and the

yokes

84a and 84b as the 1 st biasing portions, the biasing force generated by the plate spring 6 as the 2 nd biasing portion, and the driving force generated by the

magnets

41a and 41b and the

coils

81a and 81b as the driving portions are set to be able to exert their mutual effects. That is, the biasing force by the 1 st biasing portion is set to be larger than the biasing force by the 2 nd biasing portion, so that the support ball 5 does not float. The driving unit provides a driving force that can rotate the movable unit with respect to the fixed unit against the biasing force of the 1 st biasing unit. The biasing force of the 2 nd biasing unit has a biasing force that keeps the rotation center ball 43 at the position of the rotation axis P even if the biasing force of the 1 st biasing unit and the driving force of the driving unit exist.

As shown in fig. 6, when the FPC base 30 for the movable portion rotates about the rotation axis P as a part of the movable portion, the base end portion 31P of the 1 st FPC extension 31 deforms to the folded portion 31r, and the base end portion 32P of the 2 nd FPC extension 32 deforms to the folded portion 32 r. Although a restoring force, i.e., a reaction force, for restoring the deformation to the original state is generated in the 1 st FPC extension 31 and the 2 nd FPC extension 32, the 1 st FPC extension 31 and the 2 nd FPC extension 32 are provided in point symmetry with respect to the rotation axis P, and therefore cancel each other out, and a reaction force for moving the rotation center ball 43 from the rotation axis P is hard to occur.

In the movable portion circuit portion 3 of the present embodiment, the 1 st FPC extension 31 and the 2 nd FPC extension 32 are drawn out in the + Z direction from the surface of the movable portion FPC base 30 on the + Z side, but as in the movable portion circuit portion 3a shown in fig. 7, both edge portions of the movable portion FPC base 30 may be the base end portions 31pa and 32pa. The 1 st FPC extension 31a and the 2 nd FPC extension 32a are drawn out in the + Z direction from positions point-symmetrical with respect to the rotation axis P on the respective long sides of the + X side and the-X side. The 1 st FPC extension 31a extends therefrom in a strip shape in the + Y direction and extends in the-X direction after being bent 90 ° at the + X + Y side corner, and further extends in the + Y direction after being bent 90 ° at the-X + Y side corner. The 2 nd FPC extension 32a is disposed in point symmetry with the 1 st FPC extension 31 a. The movable portion circuit portion 3a is formed in a rectangular parallelepiped shape as a whole, the movable portion FPC base 30 forms the bottom of the same rectangular parallelepiped, and the 1 st FPC extension 31a and the 2 nd FPC extension 32a form the side of the same rectangular parallelepiped.

In this embodiment, since the 1 st FPC extension 31a and the 2 nd FPC extension 32a are also provided in point symmetry with respect to the rotation axis P, even if the 1 st FPC extension 31a and the 2 nd FPC extension 32a are deformed with the rotation of the movable portion, reaction forces cancel each other out, and it is difficult for a reaction force to occur such that the rotation center ball 43 moves from the rotation axis P. In addition, since the 1 st FPC extension portion 31a and the 2 nd FPC extension portion 32a are easily deformed with respect to the displacement accompanying the rotation of the movable portion, the absolute value of the reaction force can also be reduced.

In addition, in the-X + Y side corner portion of the 1 st FPC extension 31a, it may be arranged so as to be bent in the-Y direction and be aligned with the 2 nd FPC extension 32a. The base end portions 31pa and 32pa may be provided at any position as long as they are edge portions at positions point-symmetric about the rotation axis P.

The above is a detailed configuration of the present embodiment. The image sensor driving device 106 in the present embodiment includes: a fixed part; a movable portion that supports the image sensor 105 receiving incident light transmitted through the lens body 103, and is rotatable with respect to the fixed portion about an axis of a rotation shaft P that passes through a light receiving surface 107 of the image sensor 105 and is orthogonal to the light receiving surface 107; and a movable portion circuit portion 3. The movable portion circuit portion 3 includes: an FPC base 30 for a movable portion extending in parallel with the light receiving surface 107 and serving as a movable portion; and a 1 st FPC extension 31 and a 2 nd FPC extension 32 that are drawn out from the movable portion FPC base 30 in the direction of the rotation axis P at base ends 31P, 32P that are point-symmetric with respect to the rotation axis P. According to the present embodiment, since the 1 st FPC extension 31 and the 2 nd FPC extension 32 are drawn out in the rotation axis direction at the base end portions 31P and 32P point-symmetrical with respect to the rotation axis P, the reaction forces of the 1 st FPC extension 31 and the 2 nd FPC extension 32 generated by the rotation cancel each other out on the rotation axis P. Therefore, the shake of the rotation axis P caused by the FPC can be reduced.

In the present embodiment, the base end portions 31P and 32P are provided at the edge portion or inside the rectangular FPC base for movable portion 30 as viewed from the direction of the rotation axis P. Therefore, when viewed from the direction of the rotation axis P, the 1 st FPC extension 31 and the 2 nd FPC extension 32 can be accommodated within the range of the FPC base for movable portion 30, and the image sensor driving device 106 can be accommodated in the smartphone 109.

Description of the reference symbols

1, mounting an outer shell; 2 an image pickup unit; 3. 3a movable portion circuit portion; 4, plates; 5 supporting the ball; 6, a plate spring; 7, a base; 8 a circuit part for fixing part; 9 a lower housing; 11 a top plate; 12 side plates; 21 a sensor housing; 22 a filter; 30 FPC base for movable portion; 31. 31a 1 st FPC extension; base ends 31p and 31 pa; 31r folded parts; 32. 32a 2 nd FPC extension; base ends 32p and 32 pa; a 32r fold-over portion; 41a, 41b magnets; 42 a projection; a 42r crease; 43 a rotation center ball; 44a, 44b notch portions; 45 central hole; 61a, end 1; 61b, 2 nd end; 62. 71a, 71b, 71c ball receiving portions; 63 a ball receiving aperture; 72a support part 1; 72b support part 2; 73 a stop; 75. 76, 78, 79 holes; 77 a resin reservoir; 81a, 81b coils; 82a, 82b hall elements; 83 a control IC;84a, 84b yokes; 85. 86, 87 notch parts; 88 a 3 rd FPC extension; 89 an FPC base for fixing part; 91 a base plate; 92 side plates; 100 a camera device; 101 prisms; 103 a lens body; 105 an image sensor; 106 image sensor driving means; 107 a light receiving surface; 109 a smart phone; 121. 921 a slit; 721. 722 a projection; p axis of rotation.

Claims

1. An image sensor driving device is characterized by comprising:

a fixed part;

a movable portion that supports an image sensor that receives incident light that has passed through a lens, and that is rotatable with respect to the fixed portion about an axis of a rotation shaft that passes through a light-receiving surface of the image sensor and is orthogonal to the light-receiving surface; and

a circuit part for the movable part, wherein,

the circuit unit for the movable unit includes: an FPC base portion for a movable portion extending in parallel with the light receiving surface as the movable portion; and a 1 st FPC extension portion and a 2 nd FPC extension portion that are drawn out from the base portion of the FPC for the movable portion in the direction of the rotation axis at base end portions that are point-symmetric with respect to the rotation axis.

2. The image sensor driving device according to claim 1, wherein:

the base end portion is provided at an edge portion or inside of the rectangular FPC base for the movable portion when viewed from the direction of the rotation shaft.

3. The image sensor driving device according to claim 1, wherein:

the 1 st FPC extension portion and the 2 nd FPC extension portion further extend in a direction parallel to a long side of the rectangular image sensor, and are led out from a short side of the image sensor to the outside of the image sensor driving device.

4. The image sensor driving device according to claim 1, wherein:

the movable portion has a rectangular plate member to which the FPC base for movement is fixed, the FPC base for movement is fixed to and electrically connected to the image sensor, and the dimension of the plate member in the direction of the short side is the same as the dimension of the image sensor in the same direction.

5. The image sensor driving apparatus according to claim 4, wherein:

and notch parts through which the 1 st FPC extending part or the 2 nd FPC extending part passes are arranged at positions, which are point-symmetrical relative to the rotating shaft, on the long edge of the plate.

6. The image sensor driving device according to claim 5, wherein:

the plate material is folded by 180 degrees by sandwiching the plate material between the 1 st FPC extension portion and the 2 nd FPC extension portion of the cutout portion, and is further led out in the direction of the rotation axis at the base end portion.

7. The image sensor driving device according to claim 6, wherein:

the base end portion extends in the direction of the short side and is disposed in the vicinity of the rotation shaft.

8. The image sensor driving device according to claim 7, wherein:

the 1 st FPC extending part and the 2 nd FPC extending part which are led out are bent along the direction parallel to the long edge, and then are turned over for 180 degrees at the turning part.

9. The image sensor driving device according to claim 8, wherein:

the inner side of the folded part is cured by resin.

10. The image sensor driving device according to claim 2, wherein:

the base end portion is provided at an edge portion of the FPC base for the movable portion, and the 1 st FPC extension portion and the 2 nd FPC extension portion extend along the edge portion of the FPC base for the movable portion.

11. The image sensor driving device according to claim 1, wherein:

the fixing part has a base for rotatably supporting the movable part and a frame for forming an internal space, and the base divides the internal space into an upper space for accommodating the FPC base for the movable part and a lower space for accommodating the 1 st FPC extending part and the 2 nd FPC extending part.

12. The image sensor driving device according to claim 11, wherein:

the base has a passage portion through which the 1 st FPC extending portion and the 2 nd FPC extending portion pass to move from the upper space to the lower space.

13. A camera device provided with the image sensor driving device according to any one of claims 1 to 12.

14. An electronic device provided with the camera device according to claim 13.