CN211669423U - Lens driving device, camera device and electronic equipment - Google Patents
Lens driving device, camera device and electronic equipment Download PDFInfo
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- CN211669423U CN211669423U CN202020714953.5U CN202020714953U CN211669423U CN 211669423 U CN211669423 U CN 211669423U CN 202020714953 U CN202020714953 U CN 202020714953U CN 211669423 U CN211669423 U CN 211669423U
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- lens
- resin
- support
- optical axis
- intermediate support
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Abstract
Provided are a lens driving device, a camera device and an electronic apparatus, wherein the resin position can be kept balanced. In the lens driving device (10), an intermediate support (16) supports a lens support (14) to move freely, a base body (18) supports the intermediate support (16) to move freely, a first resin (66) is arranged between the lens support (14) and the intermediate support (16), has viscoelasticity, and is rotationally symmetric with an optical axis of the lens at least at 2, and a second resin (68) is arranged between the intermediate support (16) and the base body (18), has viscoelasticity, and is rotationally symmetric with the optical axis of the lens at least at 2. The first resin (66) is located at substantially the same position as the second resin (68) in the circumferential direction or at an intermediate position between two adjacent second resins when viewed in the optical axis direction of the lens, and the first resin (66) and the second resin (68) are arranged at least 4 positions in the circumferential direction when viewed in the optical axis direction of the lens.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a lens drive arrangement, camera device and electronic equipment.
[ background of the invention ]
Electronic devices such as mobile phones and smart phones are equipped with small cameras. Such a compact camera performs auto-focusing and shake compensation, and drives a lens support in the optical axis direction of a lens and in a direction orthogonal to the optical axis direction.
In order to suppress resonance of the lens support, a resin having viscoelasticity is provided. Conventionally, it is known to provide a resin in the center of the side of a rectangular lens driving device.
[ Prior art documents ]
[ patent document ]
[ patent document 1 ] Japanese patent application laid-open No. 2013-50668
[ Utility model ] content
[ problem to be solved by the present invention ]
However, conventionally, since the resins for auto-focusing and shake compensation are provided at the centers of the opposing 2 side portions, the balance of the positions where the resins are provided is poor.
The present invention is directed to solve the above-described problems, and provides a lens driving device, a camera, and an electronic apparatus, in which a resin position can be kept balanced.
[ MEANS FOR SOLVING PROBLEMS ] to solve the problems
One aspect of the present invention is a lens driving device having a lens support body for supporting a lens,
An intermediate support for supporting the lens support to move freely,
A base body for supporting the intermediate support body to move freely,
A first resin disposed between the lens support and the intermediate support and having viscoelasticity and disposed at least at 2 positions so as to be rotationally symmetrical about an optical axis of the lens,
And a second resin having viscoelasticity, provided between the intermediate support and the base body, and disposed at least at 2 points so as to be rotationally symmetrical about an optical axis of the lens.
The first resin is located at substantially the same position as the second resin in a circumferential direction or at an intermediate position between two adjacent second resins when viewed from the optical axis direction of the lens, and the first resin and the second resin are arranged at least 4 positions in the circumferential direction when viewed from the optical axis direction of the lens.
Preferably, the lens support is supported by a first elastic portion, which is provided with the first resin, so as to be movable with respect to the intermediate support. Further, it is preferable that the intermediate support and the lens support have a quadrangular shape as viewed in the optical axis direction of the lens, corners of the intermediate support and corners of the lens support correspond to each other, the first elastic portion has an elastic arm portion connecting one corner of the intermediate support and one corner of the lens support adjacent to the one corner, and the first resin bridges curved portions of the elastic arm portions facing each other at the middle thereof.
Preferably, the intermediate support and the lens support are formed in a quadrangular shape when viewed from the optical axis direction of the lens, corners of the intermediate support and corners of the lens support correspond to each other, and the first resin bridges between an outer surface of the lens support parallel to the optical axis direction of the lens and an inner surface of the intermediate support parallel to the outer surface at the corners of the quadrangular shape.
Preferably, the intermediate support body and the base body are freely movably supported by a second elastic portion, and the second resin is provided in the vicinity of the second elastic portion to suppress vibration transmitted from the second elastic portion. The second elastic portion is disposed at four corners of the rectangular base, and the second resin bridges between a lower surface of the intermediate support and an upper surface of the base.
Preferably, the lens support, the intermediate support, and the base body have a rectangular shape when viewed from the optical axis direction of the lens, and the first resin and the second resin may be disposed at each corner or each side of the rectangular shape. Preferably, one of the first resin and the second resin is disposed at a corner of a square shape, and the other is disposed at a side of the square shape.
Preferably, the lens support, the intermediate support, and the base body have a rectangular shape when viewed from the optical axis direction of the lens, and the first resin and the second resin are disposed on each side of the rectangular shape.
Further, it is preferable that the first resin and the second resin are arranged to be shifted in the optical axis direction of the lens.
Another aspect of the present invention is a camera device including the lens driving device, a lens supported by the lens support, and a light receiving sensor for receiving light from the lens.
Another aspect of the present invention is an electronic device equipped with the camera device.
[ Utility model effect ] is provided
According to the present invention, the viscoelastic first resin and the viscoelastic second resin are arranged, and the optical axis of the lens can be used as the center rotational symmetry. The first resin is located at substantially the same position as the second resin or at an intermediate position between adjacent second resins in the circumferential direction when viewed from the optical axis direction of the lens, and the first resin and the second resin are arranged at least 4 positions in the circumferential direction when viewed from the optical axis direction of the lens. Therefore, the positions of the first resin and the second resin can be kept in balance.
[ description of the drawings ]
Fig. 1 is a perspective view showing a state where a lens is mounted without a cover in a lens driving device according to a first embodiment of the present invention.
Fig. 2 is an exploded perspective view of a lens driving device according to a first embodiment of the present invention.
Fig. 3 is a cross-sectional oblique view showing a corner of the lens driving device in the lens driving device according to the first embodiment of the present invention.
Fig. 4 is a cross-sectional oblique view showing an edge portion of the lens driving device according to the first embodiment of the present invention.
Fig. 5 is an exploded perspective view showing a lens driving device according to a second embodiment of the present invention.
Fig. 6 is a cross-sectional oblique view showing a corner of a lens driving device in a lens driving device according to a second embodiment of the present invention.
Fig. 7 is an enlarged cross-sectional view showing a corner of a lens driving device in a lens driving device according to a second embodiment of the present invention.
[ notation ] to show
10 lens driving device
12 lens
14 lens support
16 intermediate support
18 basic body
20 shielded box
22 aperture for incidence
24 lens supporting hole
26 auto focusing coil (coil for AF)
28 magnet
30 first elastic part
32 upper spring part
34 lower spring part
36 intermediate support body side fixing part (outer side part)
38 lens support body side fixing part (inner side part)
40 resilient arm portion
42 intermediate support body side fixing part (outer side part)
44 lens support body side fixing part (inner side part)
46 resilient arm portion
48 basic parts
50 coil assembly
52, 54 light passing holes
56 coil substrate
58 wiring board
60 external connection terminal
62 second elastic part
64 wire
65 wire fixing part
66 first resin
68 second resin
[ detailed description ] embodiments
Embodiments of the present invention will be described below with reference to the drawings.
Fig. 1 to 4 show a drive device 10 according to a first embodiment of the present invention. In this specification, for convenience, one side of the lens 12 in the optical axis direction is referred to as an upper side, and the other side is referred to as a lower side.
As shown in fig. 1 and 2, the lens driving device 10 includes a lens support 14 that supports the lens 12, an intermediate support 16 that supports the lens support 14 to be movable in the optical axis direction of the lens 12, and a base 18 that supports the intermediate support 16 to be movable in a direction orthogonal to the optical axis direction together with the lens support 14. The shield case 20 has a rectangular outer shape when viewed in the optical axis direction, the lower end thereof is fixed to the base 18, and the peripheries of the lens support 14 and the intermediate support 16 are covered with the shield case 20 and the base 18. The shield case 20 is formed with an entrance hole 22 through which light enters.
The lens support 14 has a rectangular shape when viewed from the optical axis direction, and the corners are chamfered. A circular lens supporting hole 24 is formed inside the lens support 14 as viewed in the optical axis direction, and after the lens driving device 10 is completed, the lens 12 is fixed to the lens supporting hole 24. An autofocus coil (hereinafter referred to as an AF coil) 26 is fixed to an outer lower portion of the lens support 14. The AF coil 26 is wound with a core wire such as copper around the optical axis as the winding axis, and fixed to the outer periphery of the lens support 14. The AF coil 26 faces a magnet 28 described later in a direction orthogonal to the optical axis direction.
The intermediate support 16 forms a rectangular frame when viewed from the optical axis direction. The corners of the lens support 14 and the intermediate support 16 correspond to each other. Magnets 28 are fixed to four sides of the intermediate support 16.
The first elastic portion 30 is located between the lens support 14 and the intermediate support 16, and the lens support 14 is supported by the first elastic portion 30 so as to be movable in the optical axis direction with respect to the intermediate support 16.
The first elastic portion 30 has an upper spring member 32 formed of a leaf spring and a lower spring member 34 also formed of a leaf spring.
The upper spring member 32 is divided into 2 parts, and has 2 intermediate support body-side fixing portions (hereinafter referred to as outer portions) 36, 1 lens support body-side fixing portion (hereinafter referred to as inner portion) 38, and 2 elastic arm portions 40 connecting the outer portions 36 and the inner portions 38, respectively. The outer portion 36 is fixed to a corner portion of the upper surface of the intermediate support 16 by an adhesive or the like. The inner portion 38 is fixed to the upper surface of the lens support 14 by an adhesive or the like. Each elastic arm portion 40 has one side connected to the outer portion 36, extends from the outer portion 36 along the side toward the side center of the intermediate support 16, is bent inward in the side center in a reverse S-shape, is further bent outward in an S-shape, extends along the side to the vicinity of the other corner of the intermediate support 16, and is bent inward to be connected to the inner portion 38. That is, the elastic arm portion 40 is curved, and a portion reverse to the S shape is opposed to the S shape in the middle thereof. The 1 inner side 38 is connected to 2 resilient arm portions 40. In this way, the elastic arm portions 40 connect the corner portions of the intermediate support 16 and the corner portions of the lens support 14 adjacent to the corner portions.
The lower spring member 34, which is not divided, has a rectangular ring-shaped intermediate support body-side fixing portion (hereinafter referred to as an outer portion) 42, an annular lens support body-side fixing portion (hereinafter referred to as an inner portion) 44, and 4 elastic arm portions 46 connecting the outer portion 42 and the inner portion 44, as in the upper spring member 32. The outer portions 42 are fixed to the corners of the lower surface of the intermediate support 16 with an adhesive or the like. The inner portion 44 is fixed to the lower surface of the lens support 14 by an adhesive or the like. The elastic arm portion 46 extends from the outer portion 42 to the inner portion 44 through several bent portions so as to avoid the magnet 28 described later.
The base body 18 has a quadrangular shape when viewed from the optical axis direction. The corners of the base body 18 and the intermediate support body 16 correspond to each other. The base body 18 has a base member 48 and a coil assembly 50. Light-passing holes 52 and 54 for passing light are formed in the base member 48 and the coil assembly 50, respectively. The coil assembly 50 is fixed to the upper surface of the base member 48.
The coil assembly 48 includes a coil substrate 56 and a wiring substrate 58. The coil substrate 56 has a jitter compensation coil formed on each of the four sides thereof. The coil for shake compensation faces the lower surface of the magnet 28. The coil for jitter compensation is electrically connected to the wiring board 58.
In the wiring substrate 58, the external connection terminal 60 is formed on one side of the wiring substrate 58 and protrudes downward. The external connection terminal 60 is exposed to the outside.
The intermediate support 16 is supported by the second elastic portion 62 and is movable in a direction orthogonal to the optical axis direction of the lens 12 with respect to the base 18. The second elastic portion 62 has 4 wires 64 in structure. The 4 wires 64 are disposed between the base body 18 and the upper spring member 32 at the corners of the base body 18. The lower ends of the wires 64 are fixed to the wiring board 58 at the corners of the base 18. The upper end of the wire 64 is fixed to a wire fixing portion 65 that protrudes further outward from the outer portion 36 of the upper spring member 32. The wire 64 supports the lens support 14, the magnet 26, the upper spring member 32, and the lower spring member 34 as a movable body together with the intermediate support 16, and allows the movable body to move in a direction orthogonal to the optical axis direction of the lens 12.
2 of the wires 64 also serve as wiring, the lower end of which is electrically connected to the wiring board 58 and the upper end of which is electrically connected to the upper spring member 32. That is, the current for focusing from the external connection terminal 60 of the wiring board 54 flows to the AF coil 26 through one end of the upper spring member 32 divided into 2 parts by one of the wires 32, and further flows out from the external connection terminal 60 of the wiring board 58 through the other end of the upper spring member 32 and the other wire 64.
The lens support 14 is provided with a lens 12 and a light receiving sensor, not shown, and serves as a camera. In this camera apparatus, light input from a subject through the lens 12 is detected by a light receiving sensor, not shown. The amount of movement of the lens 12 for focusing the subject is calculated by a controller provided in the camera. The controller controls to cause a current corresponding to the amount of movement of the lens to flow to the AF coil 26. When a current flows into the AF coil 26, a Lorentz force is generated in the AF coil 26 by a magnetic flux from the magnet 28, and the lens 12 moves against the upper spring member 32 and the lower spring member 34 together with the AF coil 26 and the lens holder 14, so that a focus is focused.
If the camera device has a shake, the direction and amount of the shift are detected by a sensor, not shown, and the coil for shake compensation is energized to generate a reaction force of lorentz magnetic force on the moving body including the lens 12, and the moving body is moved in a direction perpendicular to the optical axis direction of the lens 12 against the elastic force of the wire 64 to compensate the shake.
In order to suppress the vibration generated when the lens support 14 or the intermediate support 16 is stopped during the focusing or the shake compensation, a first resin 66 and a second resin 68 having viscoelasticity such as silicone resin are provided as shown in fig. 3 and 4. Resins having viscoelastic properties are so-called damping gels.
The first resin 66 is disposed between the lens support 14 and the intermediate support 16. The first resin 66 is provided on the side of the square shape at 4, and can be rotationally symmetric at 90 degrees around the optical axis of the lens 12. In the first embodiment, the first resin 66 is provided so as to bridge the reverse S-shaped portion and the S-shaped portion of the upper spring member 32. If the lens support 14 vibrates up and down, the lens support side of the upper spring member 32 vibrates, but this vibration can be suppressed by the first resin 66.
In the first embodiment, the first resin 66 bridges between the upper spring members 32, but may directly bridge between the upper spring members 32 and the intermediate support 16. In any case, the first resin 66 is preferably provided near the center of each side portion.
The second resin 68 is disposed between the intermediate support 16 and the base body 18. The second resin 68 is provided at 4 positions, like the first resin 66, and can be rotationally symmetric by 90 degrees with respect to the optical axis of the lens 12. In the first embodiment, the second resin 68 is disposed at the corner portions of the intermediate support 16 and the base 18. Specifically, the second resin 68 bridges between the lower surface of the intermediate support 16 and the upper surface of the coil substrate 56. The second resin 68 is disposed in the vicinity of the wires 64 also provided at the corner. In this way, since the second resin 68 is provided in the vicinity of the wires 64, it is easy to suppress the vibration of the intermediate support 16 transmitted from the wires 64.
The arrangement of the first resin 66 and the second resin 68 in the first embodiment is as follows. That is, the first resin 66 is disposed at 4 positions on the side portions of the quadrangle and can be rotationally symmetric around the optical axis of the lens. The second resin 68 is disposed at the corner 4 of the quadrangle and can be rotationally symmetric around the optical axis of the lens. The first resin 66 is located at a position in the circumferential direction between two adjacent second resins 68 when viewed from the optical axis direction of the lens. The first resin 66 and the second resin 68 are arranged at 8 positions in the circumferential direction as viewed from the direction of light of the lens. With such a configuration, the positions of the first resin 66 and the second resin 68 can be kept balanced.
Fig. 5 to 7 show a lens driving device 10 according to a second embodiment of the present invention.
The second embodiment is different from the first embodiment mainly in the following 3 points.
(1) Arrangement and shape of AF coil 26
(2) Shape of the upper spring member 32
(3) The position where the first resin 66 is disposed
The AF coil 26 of the first embodiment is provided around the entire outer circumference of the lens support 14 with the optical axis direction as the winding axis direction, and the AF coil 26 of the second embodiment is fixed to the outer surfaces of the lens support 14 on opposite sides thereof with the direction orthogonal to the optical axis direction as the winding axis direction. The AF coil 26 is composed of portions extending linearly in a direction orthogonal to the optical axis direction of the lens 12 in both the vertical direction and a semicircular portion connecting the linearly extending portions. The lower linear extension of the 2 AF coils 26 faces the 2 magnets 28 fixed to the intermediate support 16, and drives the lens support 14 in the optical axis direction of the lens 12 in cooperation with the magnets 28.
While the elastic arm portion 40 of the upper spring member 32 of the first embodiment extends from the position of the corner to the position of the adjacent corner, the elastic arm portion 40 of the upper spring member 32 of the second embodiment extends along the 2 sides of the lens support 14 where the AF coil 26 is not provided, and has a shape returning from the middle.
The first resin 66 of the first embodiment is provided on the upper spring member 32, and the first resin 66 of the second embodiment is provided on the corner portions of the lens support 14 and the intermediate support 16, as shown in fig. 6 and 7. The first resin 66 bridges between the outer surface of the lens support 14 and the inner surface of the intermediate support 16.
In the second embodiment, the first resin 66 and the second resin 68 are provided at the corners of the lens drive device 10 and are disposed at 90-degree rotational symmetry positions. That is, the first resin 66 is disposed at 4 positions of the corners of the quadrangle and can be rotationally symmetric around the optical axis of the lens. The second resin 68 is disposed at the corner 4 of the quadrangle and can be rotationally symmetric around the optical axis of the lens. The first resin 66 is located at substantially the same position in the circumferential direction as the second resin 68 when viewed from the optical axis direction of the lens. The first resin 66 and the second resin 68 are arranged at 4 positions in the circumferential direction as viewed from the direction of light of the lens. With this configuration, the positions of the first resin 66 and the second resin 68 can be kept balanced.
The same reference numerals are attached to the drawings for the same parts of the second embodiment as those of the first embodiment, and the description thereof will be omitted.
In addition, although the lens driving device 10 having a square shape has been described in the first and second embodiments, the present invention is not limited to this. For example, the lens 12 may be circular when viewed from the optical axis direction. The positions of the first resin 66 and the second resin 68 are rotationally symmetric about the optical axis of the lens 12, but may be shifted by 2 or 3 positions. In this case, the first resin 66 and the second resin 68 may be alternately arranged in the circumferential direction. In the first and second embodiments, the second resin 68 is disposed at each corner, but may be disposed at each side.
Claims (12)
1. A lens driving device, comprising:
a lens support body supporting the lens;
an intermediate support for supporting the lens support to move freely;
a base body supporting the intermediate support body to be freely movable;
a first resin having viscoelasticity, provided between the lens support and the intermediate support, and disposed at least at 2 so as to be rotationally symmetrical about an optical axis of the lens; and
a second resin having viscoelasticity, provided between the intermediate support and the base body, and disposed at least at 2 points so as to be rotationally symmetrical about an optical axis of the lens;
wherein the first resin is located at substantially the same position as the second resin or at an intermediate position between two adjacent second resins in a circumferential direction when viewed from the optical axis direction of the lens, and the first resin and the second resin are arranged at least 4 positions in the circumferential direction when viewed from the optical axis direction of the lens.
2. The lens driving device according to claim 1, wherein the lens support is supported by a first elastic portion, which is freely movable with respect to the intermediate support, and the first resin is provided on the first elastic portion.
3. The lens driving device according to claim 2, wherein the intermediate support and the lens support are quadrangular as viewed from the optical axis direction of the lens, and corners of the intermediate support and the lens support correspond to each other;
the first elastic portion has an elastic arm portion connecting one corner portion of the intermediate support and one corner portion of the lens support adjacent to the one corner portion,
the first resin bridges the bent portions of the elastic arm portions facing each other at the middle thereof.
4. The lens driving device according to claim 1, wherein the intermediate support and the lens support are quadrangular as viewed from the optical axis direction of the lens, and corners of the intermediate support and the lens support correspond to each other,
the first resin bridges between an outer surface of the lens support parallel to the optical axis direction of the lens and an inner surface of the intermediate support parallel to the outer surface at the corner of the quadrangle.
5. The lens driving device according to claim 1, wherein the intermediate support and the base are movably supported by a second elastic portion, and the second resin is provided in the vicinity of the second elastic portion to suppress vibration transmitted from the second elastic portion.
6. The lens driving device according to claim 5, wherein the second elastic portion is disposed at four corners of the rectangular base body, and the second resin bridges between a lower surface of the intermediate support and an upper surface of the base body.
7. The lens driving device according to claim 1, wherein the lens support, the intermediate support, and the base body have a square shape when viewed from an optical axis direction of the lens, and the first resin and the second resin are disposed at respective corners of the square shape.
8. The lens driving device according to claim 1, wherein the lens support, the intermediate support, and the base body have a square shape when viewed from an optical axis direction of the lens, and the first resin and the second resin are disposed on respective sides of the square shape.
9. The lens driving device according to claim 1, wherein the lens support, the intermediate support, and the base body have a square shape when viewed from the optical axis direction of the lens, and one of the first resin and the second resin is disposed at a corner of the square shape and the other is disposed at a side of the square shape.
10. The lens driving device according to claim 1, wherein the first resin and the second resin are arranged to be shifted in an optical axis direction of the lens.
11. A camera device comprising the lens driving device according to any one of claims 1 to 10, a lens supported by the lens support body, and a light receiving sensor that receives light from the lens.
12. An electronic device characterized by having the camera device according to claim 11.
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| CN202020714953.5U CN211669423U (en) | 2020-04-30 | 2020-04-30 | Lens driving device, camera device and electronic equipment |
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| CN202020714953.5U CN211669423U (en) | 2020-04-30 | 2020-04-30 | Lens driving device, camera device and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115061325A (en) * | 2021-09-08 | 2022-09-16 | 新思考电机有限公司 | Lens driving device, camera device, and electronic apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115061325A (en) * | 2021-09-08 | 2022-09-16 | 新思考电机有限公司 | Lens driving device, camera device, and electronic apparatus |
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