CN210376827U

CN210376827U - Optical member driving device, camera device, and electronic apparatus

Info

Publication number: CN210376827U
Application number: CN201921758607.0U
Authority: CN
Inventors: 卓英吉; 孙伟
Original assignee: New Shicoh Technology Co Ltd
Current assignee: New Shicoh Motor Co Ltd; New Shicoh Technology Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-04-21
Anticipated expiration: 2029-10-18

Abstract

The utility model provides an optical component drive arrangement, camera device and electronic equipment that width of optical axis direction is little. The OIS lens driving device (10) comprises a fixing part provided with a plate-shaped base (6) having a through hole (67); a movable part having a spring plate (5) for placing an optical component; and an SMA drive unit (4) having an SMA wire (41) for driving the movable unit. The spring plate (5) has a body part (51) of the spring plate (5) and two arm parts (55) which extend from the body part (51) of the spring plate (5) and are fixed to the plate surface of the base (6), and the whole body of the body part (51) of the spring plate (5) is positioned inside the through hole (67) when viewed from the normal direction of the plate surface.

Description

Optical member driving device, camera device, and electronic apparatus

Technical Field

The present invention relates to an optical component drive device, a camera device, and an electronic apparatus used in an electronic apparatus such as a smartphone.

Background

Various proposals have been made for a camera device equipped with an ois (optical Image stablizer) function. As a document disclosing a technique related to such an apparatus, there is patent document 1. The imaging apparatus disclosed in patent document 1 integrates an OIS base as a fixed portion and a guide as a movable portion supporting a lens by connecting an OIS base as a fixed portion and a guide as a movable portion to each other via 2 pairs of SMA (shape Memory alloy) wires, wherein 2 pairs of SMA contract in the X-axis direction and the Y-axis direction by heat generation by current. The image pickup apparatus controls the supply of the SMA wire to realize the shake correction.

[ patent document 1 ] specification of Chinese patent No. 108174104

However, in the technique of patent document 1, since the OIS base and the guide are stacked in the Z-axis direction, which is the optical axis direction, there is a problem in that the width in the Z-axis direction becomes large.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical component driving device, a camera device, and an electronic apparatus, which reduce the width in the optical axis direction.

In order to solve the above problem, an optical component driving device according to a preferred embodiment of the present invention includes a fixing portion having a plate-shaped base having a through hole; a movable portion having a spring plate for mounting an optical component; and an SMA drive section having an SMA cable for driving the movable section, wherein the spring plate has a spring plate body and two arms extending from the spring plate body and fixed to the surface of the base, and the spring plate body is located entirely inside the through hole as viewed from a normal direction of the surface of the spring plate body.

In the aspect, the spring plate may have a 1 st pin protruding outward from the spring plate body, and the movable-side end portion of the SMA drive unit may be provided on the 1 st pin.

Further, the 1 st pin may be formed integrally with the spring plate.

In addition, the movable side end of the 1 st pin or the SMA drive section slides with respect to the base.

Further, portions of the two arm portions fixed to the base may be exposed to the outside.

Further, a fixed-side end portion of the SMA drive unit may be provided on a 2 nd pin provided on the base, and the 2 nd pin may be exposed to the outside.

The optical component may have an optical component body and a rim provided around the optical component body, and the rim may slide with respect to a fixed-side end portion of the SMA drive unit.

The SMA wire of the SMA drive unit may be provided at the same height as the spring plate in a normal direction of the plate surface of the spring plate.

In addition, the SMA cables of the SMA drive unit may be provided on both sides of the spring plate in a normal direction of the plate surface of the spring plate.

The fixed portion may further include a housing, and the movable portion or the optical component on the movable portion may slide with respect to a slide portion provided on a rear surface of a front wall of the housing.

The camera device according to another preferred embodiment of the present invention is characterized by comprising the optical member driving device; a lens assembly as the optical component; an AF lens assembly that passes light from an object; and an image sensor that receives light passing through the AF lens assembly, the lens assembly being disposed between the subject and the AF lens assembly.

An optical path refraction element may be disposed between the lens assembly and the AF lens assembly.

The camera device according to another preferred embodiment of the present invention is characterized by comprising the optical member driving device; a lens assembly as the optical component; an AF lens assembly that passes light from an object; and an image sensor receiving light passing through the AF lens assembly, the lens assembly being disposed between the AF lens assembly and the image sensor.

The camera device according to another preferred embodiment of the present invention is characterized by comprising the optical member driving device; an AF lens body through which light from an object passes; and an image sensor as the optical member that receives light passing through the AF lens body.

An electronic device according to another aspect of the present invention is provided with the camera device.

The optical component driving device of the utility model comprises a fixed part provided with a plate-shaped base with a through hole; a movable portion having a spring plate for mounting an optical component; and an SMA drive section having an SMA cable to drive the movable section. Therefore, the spring plate is provided with a spring plate body and two wrist parts which extend out of the spring plate body and are fixed on the plate surface of the base, and the spring plate body is integrally positioned at the inner side of the through hole when being observed from the normal direction of the plate surface. Thus, the optical component drive device can be made thinner by only the thickness of the base, the spring plate, and the SMA drive section. Thus, according to the present invention, it is possible to provide an optical component driving device, a camera device, and an electronic apparatus in which the width in the optical axis direction is small.

Drawings

In fig. 1, (a) is a front view of a smartphone 70, and (B) is a side view of the smartphone 70, the smartphone 70 is an electronic device on which a camera apparatus 1 is mounted, and the camera apparatus 1 includes an OIS lens driving apparatus 10 as an optical component driving apparatus according to an embodiment of the present invention.

Fig. 2 is a perspective view of the camera device 1 of fig. 1.

Fig. 3 is a perspective view of the OIS lens driving apparatus 10 of fig. 2.

Fig. 4 is a sectional view taken along line a-a' of fig. 3.

Fig. 5 is a perspective view illustrating the OIS lens driving apparatus 10 of fig. 1 in an exploded view.

Fig. 6 is an exploded perspective view of the OIS lens driving apparatus 10 of fig. 1 viewed from another perspective.

Fig. 7 is a view of fig. 3 with the housing 2 removed.

Fig. 8 is a view of fig. 7 with the OIS lens assembly 3 removed.

Fig. 9 is a view of fig. 8 as viewed from the + Z side.

Description of the reference numerals

1. A camera device; 2. a housing; 3. an OIS lens assembly; 4. an SMA drive section; 5. a spring plate; 6. a base; 8. an AF lens assembly; 10. a lens driving device; 23. a front wall; 24. a side wall; 25. 26, a recess; 27. 57, 67, a through hole; 30. an OIS lens body; 31. a rim portion; 41. an SMA cable; 42. a fixed-side end portion; 43. an active-side end portion; 51. a body portion; 53. a 1 st pin; 55. a wrist portion; 56. connecting sheets; 62. a 2 nd pin; 70. a smart phone; 81. a prism; 83. an image sensor; 91. a prism device; 92. an AF lens driving device; 520. 530, a notch.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in fig. 1, the camera device 1 is housed in a housing of a smartphone 70. The camera device 1 includes an OIS lens assembly 3 and an AF lens assembly 8 as optical components; a prism 81 as an optical path refractive element; an image sensor 83 as a photoelectric conversion element; an OIS lens driving device 10 for driving the OIS lens assembly 3; a prism device 91 that houses the prism 81; and an AF lens driving device 92 for driving the AF lens assembly 8. OIS is an abbreviation for Optical Image Stabilization. AF is an abbreviation for Auto focus.

Hereinafter, the optical axis direction of the OIS lens assembly 3 along the optical axis of the OIS lens body 30 is appropriately referred to as the Z direction, one direction orthogonal to the Z direction is appropriately referred to as the X direction, and a direction orthogonal to both the Z direction and the X direction is appropriately referred to as the Y direction. The + Z side, which is the side of the OIS lens 30 on the optical axis of the object, may be referred to as the front side, and the-Z side, which is the side opposite to the object on which the prism 81 is provided, may be referred to as the rear side. The + Y side is sometimes referred to as the upper side, the-Y side as the lower side, the + X side as the left side, and the-X side as the right side.

As shown in fig. 1 (a), 1 (B), and 2, in the camera device 1, the prism device 91 is disposed behind the OIS lens driving device 10, and the AF lens driving device 92 is disposed below the prism device 91. The OIS lens drive 10 supports the OIS lens assembly 3. In the prism device 91, a prism 81 is disposed, and an incident surface thereof faces the OIS lens assembly 3 and an emission surface thereof faces the AF lens assembly 8. In the AF lens driving device 92, the AF lens assembly 8 is arranged so that the direction along the optical axis of the AF lens body is the Y direction. On the lower side of the AF lens driving device 92, an image sensor 83 is disposed. Light from the object passes through the OIS lens assembly 3 and is reflected downward by the prism 81. The light reflected by the prism 81 passes through the AF lens assembly 8 and is collected on the image sensor 83. The image sensor 83 photoelectrically converts the light and outputs the converted light as an image signal. In order to reduce the size of the smartphone 70 in the Z direction, i.e., the thickness direction, the camera device 1 is required to reduce the size in the Z direction, and therefore, the size in the Z direction, i.e., the thickness, of the OIS lens driving device 10 is required to be reduced.

As shown in fig. 3 to 6, the OIS lens driving apparatus 10 includes a housing 2, an SMA drive unit 4, a spring plate 5, and a base 6. The details of the structure of each part will be described below. The housing 2 and the base 6 form a housing space for housing the SMA drive unit 4, the spring plate 5, and the OIS lens assembly 3.

The housing 2 has a square front wall 23 and a side wall 24 slightly protruding rearward from the periphery of the front wall 23, and forms a box-like body, and a through hole 27 is provided in the center of the front wall 23. The through hole 27 has a shape obtained by chamfering four corners of a square. A plurality of

recesses

25, 26 recessed to the front side are provided at the rear end of the side wall 24. The OIS lens assembly 3 is a main body thereof, and includes an OIS lens body 30 as an optical component main body and a rim portion 31 provided around the OIS lens body. The edge portion 31 is a square plate having a circular hole at the center, and the OIS lens body 30 is fixed to the inner periphery of the hole.

The SMA drive section 4 has an SMA cable 41 extending in one direction and a fixed side end portion 42 and a movable side end portion 43 at both ends thereof. One end and the other end of the SMA cable 41 are firmly fixed to the fixed-side end portion 42 and the movable-side end portion 43, respectively. The fixed-side end portion 42 and the movable-side end portion 43 are formed of a conductive material, and function as electrical connection portions when current is passed to the SMA cable 41.

The spring plate 5 has a main body 51 having a substantially rectangular outer shape and 2 arm portions 55 extending outward from 2 parallel end edges of the main body 51. A through hole 57 is provided in the center of the main body 51. The four corners of the main body 51 are cut out at the respective diagonal portions to form cut-out

portions

520 and 530.

The arm 55 protrudes from the base end of the main body 51 at a position where the edge in the X direction is close to the notch 530, extends along the edge in the X direction to the notch 520, bends around the outside of the notch 520 to the side of the edge in the Y direction, and extends in a direction away from the edge to the outside. A connection piece 56 is provided at the front end of the wrist portion 55.

The notch 530 is provided with a 1 st pin 53 so as to protrude diagonally outward from the main body 51. The 1 st pin 53 has a pentagonal shape. The 1 st pin 53 is formed integrally with the body portion 51 of the spring plate 5.

The base 6 has a rectangular plate shape. A through hole 67 is provided in the center of the base 6. The through hole 67 has a shape obtained by chamfering four corners of a square. At the upper right and lower left corners of the front of the base 6, there are 2 nd pins 62, respectively. The 2 nd pin 62 is formed in a rectangular plate shape, and one end surface thereof is substantially the same surface as the end surface of the outer shape of the base 6.

In each of the above-described portions, the housing 2 and the base 6 form a fixed portion, the spring plate 5 and the OIS lens assembly 3 form a movable portion that moves relative to the fixed portion, and the fixed portion and the movable portion are coupled by 4 SMA drive portions 4.

This will be explained in more detail. The rear end of the side wall 24 of the housing 2 engages with the front peripheral edge of the base 6. The spring plate 5 is disposed on the front surface of the base 6 in a space having a small width surrounded by the housing 2 and the base 6. As shown in fig. 9, the main body 51 of the spring plate 5 is located entirely inside the through hole 67 of the base 6 as viewed from the normal direction of the plate surface. The 2 1 st pins 53 of the spring plate 5 project outward from the chamfered portions in the through holes 67 of the base 6, and the projecting portions overlap the base 6, but do not contact with each other in the present embodiment. The OIS lens assembly 3 is supported by the body 51 with the edge 31 placed thereon.

The arm portion 55 of the spring plate 5 extends outward of the through hole 67 of the base 6, and the connecting piece 56 at the front end of the arm portion 55 is joined to the front surface of the base 6. The outer end surface of the connecting piece 56 is fixed to be substantially flush with the outer end surface of the base 6, and is exposed to the outside through the recess 25 of the housing 2. The outer end surface of the 2 nd pin 62 is also exposed to the outside through the recess 26 of the housing 2. The elastic force of the 2 arm portions 55 of the spring plate 5 is balanced at the center of the through hole 57 of the main body 51. This position is referred to as the initial position. Since the arm portions 55 extend substantially in the X direction and the Y direction, the main body 51 is movable in the XY in-plane direction. Since the through hole 67 is smaller, the movable body does not contact the base 6 and can be moved with a small driving force.

The 4 SMA drive units 4 are arranged on the front surface side of the base 6 along each end side of the base 6. The fixed-side end 42 of the SMA drive unit 4 is provided on the 2 nd pin 62. The movable side end 43 of the SMA drive unit 4 is provided on the 1 st pin 53. As shown in fig. 4, the SMA wire 41 of the SMA drive unit 4 is positioned on the front side of the main body 51 and the arm 55 of the spring plate 5 in the normal direction of the plate surface of the spring plate 5.

The 4 nd pins 62 and the 2 nd tabs 56 are connected to an external power source. Thus, a current path such as the external power supply → the 2 nd pin 62 → the fixed side end portion 42 → the SMA cable 41 → the movable side end portion 43 → the 1 st pin 53 → the body portion 51 → the wrist portion 55 → the connecting piece 56 → the external power supply is formed, and the current is supplied to the SMA cable 41. The 4 SMA drive units 4 contract the SMA cables 41 by heat generation caused by energization to drive the movable units. In the movable portion, the main body of the spring plate 5 on which the OIS lens assembly 3 is mounted moves in the XY in-plane direction.

The above is the details of the configuration of the present embodiment. The OIS lens driving device 10 as the optical component driving device of the present embodiment includes a fixing portion having a plate-shaped base 6 having a through hole 67; a movable portion having a spring plate 5 for mounting an optical component; and an SMA drive section 4 having an SMA cable 41 to drive the movable section. Accordingly, the spring plate 5 includes the main body 51 of the spring plate 5 and the two arm portions 55 extending from the main body 51 of the spring plate 5 and fixed to the plate surface of the base 6, and the main body 51 of the spring plate 5 is entirely located inside the through hole 67 as viewed in the normal direction of the plate surface. Accordingly, the OIS lens driving device 10 except for the case 2 has a thickness in the optical axis direction of the base 6, the spring plate 5, and the SMA drive section 4, and can be made thin. Therefore, according to the present embodiment, it is possible to provide an optical member driving device, a camera device, and an electronic apparatus, which are small in width in the optical axis direction.

In the above embodiment, the SMA wires 41 of the 4 SMA drive units 4 may be provided at the same height as the spring plate 5 in the normal direction of the plate surface of the spring plate 5. For example, if the SMA cable 41 of the SMA drive unit 4 is laid between the main body 51 and the arm portion 55 on the side where the connecting piece 56 exists, the arm portion 55 and the SMA cable 41 do not interfere with each other, and the SMA cable 41 can be arranged at the same height as the spring plate 5. With this configuration, the width of the optical member driving device in the optical axis direction can be further reduced. In addition, the floating of the spring plate 5 can be suppressed.

In the above embodiment, the number of the SMA wires 41 of the 4 SMA drive units 4 may be 2, and the 2 SMA wires 41 may be provided on both the front side and the rear side of the spring plate 5 in the normal direction of the plate surface of the spring plate 5. The force pulling the spring plate 5 to the front side and the force pulling to the rear side are cancelled by the SMA wire 41. Therefore, the floating of the spring plate 5 can be suppressed.

In the above embodiment, the movable portion or the OIS lens assembly 3 on the movable portion may slide with respect to the sliding portion provided on the rear surface of the front wall 23 of the housing 2. The edge portion 31 may slide with respect to the fixed-side end portion 42 of the SMA drive unit 4 or another fixed portion. The 1 st pin 53 or the movable-side end 43 of the SMA drive unit 4 may slide with respect to the base 6.

In the above embodiment, the OIS lens assembly 3 is disposed between the subject and the AF lens assembly 8. In this embodiment, a prism 81 is also disposed between the OIS lens assembly 3 and the AF lens assembly 8. The OIS lens assembly 3 may be arranged between the AF lens assembly 8 and the image sensor 83.

In the above embodiment, the OIS lens body 30 is used as the optical component and the optical component driving device drives the OIS lens assembly 3, but the image sensor 83 may be used as the optical component and the optical component driving device may drive the image sensor 83. That is, the OIS lens assembly 3 may be eliminated, and the AF lens assembly 8 for focus adjustment, the AF lens driving device 92, the image sensor 83 for shake correction, and the optical component driving device may be assembled.

Claims

1. An optical component driving device is characterized by comprising:

a fixing portion having a plate-like base having a through hole;

a movable portion having a spring plate on which an optical component is placed; and

an SMA drive section having an SMA wire that drives the movable section,

the spring plate is provided with a spring plate body and two wrist parts which extend out of the spring plate body and are fixed on the surface of the base,

the spring plate body is integrally positioned on the inner side of the through hole from the normal direction of the plate surface.

2. Optical component driving device according to claim 1,

the spring plate is provided with a 1 st pin protruding outwards from the spring plate body, and the movable side end of the SMA driving part is arranged on the 1 st pin.

3. Optical component driving device according to claim 2,

the 1 st pin is integrally formed with the spring plate.

4. Optical component driving device according to claim 2,

the 1 st pin or the movable side end of the SMA drive section slides with respect to the base.

5. Optical component driving device according to claim 1,

the portions of the two arms fixed to the base are exposed to the outside.

6. Optical component driving device according to claim 1,

the fixed side end of the SMA drive unit is provided on a 2 nd pin provided on the base, and the 2 nd pin is exposed to the outside.

7. Optical component driving device according to claim 1,

the optical component has an optical component body and a rim portion provided around the optical component body, the rim portion being slidable with respect to a fixed-side end portion of the SMA drive portion.

8. Optical component driving device according to claim 1,

the SMA cables of the SMA driving part are arranged in the normal direction of the surface of the spring plate to be at the same height as the spring plate.

9. Optical component driving device according to claim 1,

the SMA cables of the SMA driving part are arranged on two sides of the spring plate in the normal direction of the surface of the spring plate.

10. Optical component driving device according to claim 1,

the fixed part is also provided with a shell body,

the movable portion or the optical member on the movable portion slides with respect to a slide portion provided on a rear surface of a front wall of the housing.

11. A camera device is characterized by comprising:

the optical component driving device according to claim 1;

a lens assembly as the optical component;

an AF lens assembly that passes light from an object; and

an image sensor that receives light passing through the AF lens assembly,

the lens assembly is disposed between the object and the AF lens assembly.

12. The camera device according to claim 11,

an optical path refraction element is disposed between the lens assembly and the AF lens assembly.

13. A camera device is characterized by comprising:

the optical component driving device according to claim 1;

a lens assembly as the optical component;

an AF lens assembly that passes light from an object; and

an image sensor that receives light passing through the AF lens assembly,

the lens assembly is disposed between the AF lens assembly and the image sensor.

14. A camera device is characterized by comprising:

the optical component driving device according to claim 1;

an AF lens body through which light from an object passes; and

an image sensor as the optical member that receives light passing through the AF lens body.

15. An electronic device comprising the camera device according to any one of claims 11 to 14.