CN210323538U

CN210323538U - Lens driving device and camera device

Info

Publication number: CN210323538U
Application number: CN201921302694.9U
Authority: CN
Inventors: 余林涛; 张志伟
Original assignee: Ruien Photoelectric Co Ltd
Current assignee: Ruien Photoelectric Co Ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-04-14
Anticipated expiration: 2029-08-09

Abstract

The present disclosure provides a lens driving device including: a lens holding barrel holding at least one lens; a frame body disposed outside the lens support cylinder; the first fixing parts are four in number, and each first fixing part is fixed to one of the four outer side faces of the frame body; and four shape memory alloy wires, wherein each shape memory alloy wire bypasses a first fixing part, and the current input/output end of each shape memory alloy wire is fixed on a second fixing part of the side wall part of the base of the lens driving device. The present disclosure also provides a camera device.

Description

Lens driving device and camera device

Technical Field

The present disclosure relates to a lens driving device and a camera device.

Background

At present, a camera function is provided in each of electronic devices such as mobile phones or personal mobile terminals, and in order to realize functions such as auto zoom, optical zoom, or optical image stabilization for cameras, it is necessary to use a lens driving apparatus capable of driving a lens.

The lens driving apparatus drives the lens using a driving force generated by the actuator, thereby changing a distance of the lens, thereby achieving a function of zooming or focusing, etc.

However, in the manufacturing process of the lens driving device, a plurality of parts are required, and the manufacturing cost is high and the manufacturing process is complicated, so that the manufacturing is difficult.

In addition, in the method of using the shape memory alloy to realize the anti-shake of the lens, interference signals are generated between the shape memory alloys, thereby affecting the control of the lens driving device, and the prior art also has some problems in the installation process of the shape memory alloy.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, the present disclosure provides a lens driving device and a camera device.

According to an aspect of the present disclosure, a lens driving apparatus includes:

a lens support barrel for holding at least one lens;

a frame body provided outside the lens support cylinder;

the first fixing parts are four in number, and each first fixing part is fixed to one of the four outer side faces of the frame body; and

four shape memory alloy wires each of which passes around one of the first fixing portions and of which a current input/output terminal is fixed to a second fixing portion of a side wall portion of the base of the lens driving device,

when the shape memory alloy wire is electrified, the frame body moves in the horizontal direction perpendicular to the optical axis direction of the lens driving device, and the frame body drives the lens supporting barrel to move in the horizontal direction, so that optical anti-shake of the lens is realized.

According to at least one embodiment of the present disclosure, two extension lines of the shape memory alloy wire that bypass the first fixing portion are parallel to each other.

According to at least one embodiment of the present disclosure, two of the four first fixing portions fixed to the adjacent two outer side surfaces of the frame body are disposed adjacent to each other, and the other two fixing portions are disposed adjacent to each other, and the two fixing portions and the other two fixing portions are disposed in a diagonal line with respect to the frame body.

According to at least one embodiment of the present disclosure, the current input and output ends of the four shape memory alloy wires are arranged adjacent to each other in pairs and arranged in a diagonal manner.

According to at least one embodiment of the present disclosure, further comprising:

an actuator that applies a driving force to the lens holding cylinder to move the lens holding cylinder in the optical axis direction; and

a guide support ball member including a first ball member and a second ball member, the first ball member and the second ball member being in contact with an outer sidewall of the lens support barrel and an inner sidewall of the frame body, the first ball member and the second ball member rolling when the lens support barrel moves relative to the frame body,

wherein the actuator is located in one quadrant of a planar rectangular coordinate system, and the guide support ball member is located in another quadrant of the planar rectangular coordinate system, which is a quadrant at a diagonal position of the one quadrant, as viewed from a top surface of the lens support barrel.

According to at least one embodiment of the present disclosure, the actuator is a piezoceramic actuator.

According to at least one embodiment of the present disclosure, the first ball member and the second ball member include three balls, respectively, which are arranged in the optical axis direction, and the upper ball and the lower ball have the same diameter and are greater than or equal to the diameter of the middle ball.

According to at least one embodiment of the present disclosure, the optical lens driving device further includes a lens support barrel position detecting device including a hall magnet and a hall sensor, the hall magnet being located on the lens support barrel, the hall sensor being located below the hall magnet in an optical axis direction,

the lens support cylinder position detection devices are two in number and arranged in a diagonal manner, and are used for respectively detecting the movement of the lens support cylinder in the X direction and the Y direction in the horizontal direction.

According to at least one embodiment of the present disclosure, the upper and lower balls of the first ball member are in close fitting contact with the outer sidewall of the lens support cylinder and the inner sidewall of the sidewall portion of the base to prevent rotation of the lens support cylinder, and the upper and lower balls of the second ball member are in redundant fitting contact with the outer sidewall of the lens support cylinder and the inner sidewall of the sidewall portion of the base to provide a mounting redundancy.

According to still another aspect of the present disclosure, a camera apparatus includes:

the lens driving device as described above;

at least one lens secured within the lens support barrel; and

an image sensor to receive light passing through the at least one lens.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is an external schematic view of a lens driving apparatus according to one embodiment of the present disclosure.

Fig. 2 is a schematic view of a lens driving apparatus according to one embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a lens driving apparatus according to one embodiment of the present disclosure.

Fig. 4 is a schematic diagram of the energization of an actuator of a lens driving apparatus according to one embodiment of the present disclosure.

Fig. 5 is a schematic view of a lens driving apparatus according to one embodiment of the present disclosure.

Fig. 6 is a schematic diagram of a lens driving apparatus according to one embodiment of the present disclosure.

Fig. 7 is a schematic view of energization of a shape memory alloy wire of a lens driving apparatus according to an embodiment of the present disclosure.

Fig. 8 is a schematic view of a shape memory alloy wire mounting of a lens driving apparatus according to one embodiment of the present disclosure.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," "below … …," "below … …," "below," "above … …," "above," "… …," "higher," and "side (e.g., as in" side walls ") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Fig. 1 shows an external schematic view of a lens driving apparatus according to one embodiment of the present disclosure.

As shown in fig. 1, the lens driving apparatus may include a lens holding cylinder 100, a frame 101, a housing 200, and a base 300. Wherein the lens holding cylinder 100 and the frame 101 are located between the housing 200 and the base 300.

Fig. 2 shows a schematic view of a lens driving device with a housing removed according to an embodiment of the present disclosure.

As shown in fig. 2, the lens driving apparatus may include a lens support barrel 100, a base 300, an actuator 400, and a guide support ball member 500.

The base 300 may include a bottom portion 301 and sidewall portions 302. The side wall portion 302 is surrounded along the bottom portion 301 and may extend in an upward direction shown in fig. 2 from a peripheral position of the bottom portion 301, thereby forming a space that accommodates the lens holding barrel 100 and the frame body 101.

The housing 200 may cover the lens holding cylinder 100 and the upper side of the frame body 101 and the outer peripheral wall of the side wall portion 302.

The actuator 400 may be located at the inner side of the frame 101 and the outer side of the lens holding cylinder 100.

The guide support ball member 500 may be in the form of a ball, and ball grooves are respectively formed on the lens support cylinder 100 and the frame body 101 so as to accommodate the guide support ball member 500.

The lens driving apparatus may further include a lens holding cylinder position detecting apparatus 600. As shown in fig. 3, the lens holder position detecting device 600 may include a hall magnet 601 and a hall sensor 602, the hall magnet 601 and the hall sensor 602 are disposed opposite to each other, the hall magnet 601 is located on the lens holder 100, and the hall sensor 602 may be located at a corresponding position on the lower side of the hall magnet 601.

Hereinafter, a lens driving device according to an embodiment of the present disclosure, which may be a device that drives a lens for a camera mounted on a mobile phone or the like, will be described with reference to fig. 1 to 3 (frame removed in fig. 3). The lens driving apparatus may include a lens support cylinder 100, a base 300, an actuator 400, and a guide support ball member 500.

The lens holding barrel 100 may be used to hold at least one lens, which may be mounted to the inside of the lens holding barrel 100, to perform an optical function by adjusting the position of the lens.

The base 300 may accommodate therein the lens holding cylinder 100, the frame 101, the actuator 400, the guide support ball member 500, and the like.

The base 300 may include a bottom portion 301 and a sidewall portion 302 upstanding from the bottom portion. The side wall portions 302 may be provided over four sides of the bottom portion 301, and are formed integrally with the bottom portion 301. The bottom portion 301 and the side wall portion 302 form a space for accommodating the lens holding cylinder 100 and the frame body 101. The sidewall portion 302 extends parallel to the optical axis direction of the lens.

The lens holding cylinder 100 may have a cylindrical body portion, and the lens holding cylinder 100 and the frame body 101 are disposed in a space formed by the bottom portion 301 and the side wall portion 302, that is, inside the body portion, and a lens cylinder including a lens is attached. The lens holding cylinder 100 can be moved in the formed space by the driving force.

The actuator 400 applies a driving force to the lens holding cylinder 100 to move the lens holding cylinder 100 in the optical axis direction. Wherein the actuator 400 may comprise a first part located on the frame 101 and a second part located on the lens holding cylinder 100, and the relative movement (up and down movement) of the lens holding cylinder 100 with respect to the frame 101 is achieved by the interaction of the first part and the second part.

According to one embodiment of the present disclosure, actuator 400 may be a piezoceramic actuator. The actuator 400 mainly includes a substrate 401, a piezoelectric element 402, and a silicon rubber 403.

Substrate 401 may be a ceramic substrate, for example, may be supported by SiC or zirconia, and substrate 401 may be integrally formed with lens-holding cylinder 100.

The silicone rubber 403 may be provided on the frame body 101.

As shown in fig. 4, the ceramic substrate 401 on the lens holding cylinder 100 can be pushed by the silicone rubber 403 behind the piezoelectric element 402. The piezoelectric element 402 may be divided into four regions, and when energized in the direction of energization a, the upper and lower two charge pumps 404 perform the actions indicated by the two dotted arrows according to the displacement of d31 (lateral displacement), thereby interacting with the ceramic substrate to move the lens holding cylinder 100 upward, and when energized in the direction of energization B, the upper and lower two charge pumps 404 perform the actions indicated by the two implementation arrows, thereby interacting with the ceramic substrate to move the lens holding cylinder 100 downward.

As shown in fig. 3, the guide support ball member 500 includes a first ball member 501 and a second ball member 502.

The first ball member 501 may include an upper ball 5011, a middle ball 5012, and a lower ball 5013. The upper ball 5011 and the lower ball 5013 may have the same diameter and be larger than the diameter of the middle ball 5012.

The second ball member 502 may include an upper ball 5021, a middle ball 5022, and a lower ball 5023. The upper ball 5021 and the lower ball 5023 may be the same diameter and larger than the diameter of the middle ball 5022.

As shown in fig. 2, ball grooves may be formed on the outer side of the lens holding cylinder 100 and the inner side of the frame 101 to accommodate the balls. The first ball member 501 and the second ball member 502 are in contact with the outer wall of the lens support cylinder 100 and the inner wall of the frame 101, and when the lens support cylinder 100 moves relative to the frame 101, the first ball member 501 and the second ball member 502 roll,

in this way, the lens support cylinder 100 is moved in the optical axis direction by the positioning support of the balls by the action of the actuator.

As shown in fig. 3, the actuator 400 is located in one quadrant of the plane orthogonal coordinate system XY and the guide support ball member 500 is located in the other quadrant of the plane orthogonal coordinate system XY, which is a quadrant at a diagonal position of the one quadrant, as viewed from the top surface of the lens support barrel 100.

As shown in fig. 2, the guide support ball member 500 is located in the second quadrant, and the actuator 400 is located in the fourth quadrant. Wherein the guide support ball members 500 and the actuators 400 are located at the corners of the respective quadrants, i.e., at the positions where the lens support barrel 100 of the respective quadrants is adjacent to the frame body 101. Although the guide support ball member 500 is shown in the second quadrant and the actuator 400 is shown in the fourth quadrant, the technical solution of the present disclosure is not limited thereto as long as they are located in two quadrants at a diagonal line.

According to an alternative embodiment of the present disclosure, the center position of the actuator 400 and the center position between the first ball member 501 and the second ball member 502 are located on a straight line passing through the center point of the lens support barrel 100.

The upper ball 5011 and the lower ball 5013 of the first ball member 501 are in close fitting contact with the outer sidewall of the lens holding cylinder 100 and the inner sidewall of the frame 101 to prevent the lens holding cylinder 100 from rotating.

The upper balls 5021 and the lower balls 5023 of the second ball member 502 are in redundant fitting mating contact with the outer sidewall of the lens support cylinder 100 and the inner sidewall of the frame 101 to provide a fitting redundancy.

The upper ball 5011 and the lower ball 5013 of the first ball member 501 have at least two contact points with the outer sidewall of the lens holding cylinder 100 and at least two contact points with the inner sidewall of the frame 101.

For example, as shown in fig. 3, the cross-sectional shape of the ball groove of the first ball member 501 is a square, and the upper ball 5011 and the lower ball 5013 located in the square ball groove have two contact points with the frame body 101 and two contact points with the outer sidewall of the lens support cylinder 100. It will be understood by those skilled in the art that other shapes may be provided, for example, the ball grooves of the outer side wall of the lens holding cylinder 100 or the ball grooves of the inner side wall of the frame 101 may be provided in a semicircular shape, etc., the shape provided being required to prevent the lens holding cylinder 100 from shaking in a direction perpendicular to the optical axis direction.

The upper ball 5021 and the lower ball 5022 of the second ball member 502 have at least one or two contact points with the outer sidewall of the lens support barrel 100 and at least one or two contact points with the inner sidewall of the frame 101.

For example, as shown in fig. 2, the ball groove of the second ball member 502 has a shape in which both surfaces are in contact with the upper ball 5021 and the lower ball 5022 on one side of the lens support cylinder 100, and the ball groove on the inner sidewall of the frame 101 has a shape in which only one surface is in contact with the upper ball 5021 and the lower ball 5022, that is, only one contact point.

By the arrangement of the first ball member 501 and the second ball member 502 and the corresponding ball grooves, it is possible to place the second ball member 502 after the first ball member 501 is placed (the first ball member 501 is closely fitted to the ball grooves thereof), and to provide a large installation margin when the second ball member 502 is placed in the ball grooves, so that it is possible to prevent a problem that the second ball member 502 cannot be placed due to machining accuracy.

In addition, the smaller diameter

middle balls

5012, 5022 in the first ball member 501 and the second ball member 502 can be used to assist the rotation of the upper and lower balls.

According to a further embodiment of the present disclosure, the lens driving device according to the present disclosure may further include a lens supporting cylinder position detecting device 600. As shown in fig. 3, the lens holder position detecting device 600 may include a hall magnet 601 and a hall sensor 602, the hall magnet 601 and the hall sensor 602 are disposed opposite to each other, the hall magnet 601 is located on the lens holder 100, and the hall sensor 602 may be located below the hall magnet 601.

The lens support cylinder position detecting device 600 is located in a quadrant other than the quadrant in which the actuator 400 is located and the guide support ball member 500 is located. Although not shown in the drawings, a set of hall magnet and hall sensor is provided at a diagonal position of hall magnet 601 and hall sensor 602 shown in fig. 3.

In the present disclosure, the hall magnet 601 may be integrally formed on the lens support barrel 100.

Furthermore, as shown in fig. 3, the signal communication of the hall sensor and the actuator to the external circuit can be realized through the flexible circuit board 700, for example, the signal communication can be realized through the interface terminal 701 shown in fig. 3.

In this way, the lens driving device can be moved up and down (up and down in the Z direction in fig. 1) by the stopper and the balls.

To achieve the optical anti-shake function, according to one embodiment of the present disclosure, the movement of the frame 101 in the horizontal direction (XY direction as shown in fig. 1) is achieved using a Shape Memory Alloy (SMA) wire.

It should be noted that the use of Shape Memory Alloy (SMA) wires to achieve the optical anti-shake function can be applied to the above-described structure in which the actuator is engaged with the ball, and can also be applied to other structures in which the lens is moved up and down.

In addition, the frame 101 is not fixed to the base, and can be moved in the horizontal direction by the memory alloy wire. For convenience of understanding, it can be understood by those skilled in the art that during the movement process in the horizontal direction, the frame 101 and the lens support barrel 100 are of an integral structure, and the movement of the frame 101 in the horizontal direction drives the movement of the lens support barrel 100 in the horizontal direction, thereby implementing the optical anti-shake function.

Referring to fig. 5 and 6, the optical anti-shake apparatus may include a shape memory alloy wire 801, a first fixing portion 802, and a second fixing portion 803.

The first fixing portion 802 is fixedly connected to one end of the outer side surface of the frame body 101, and according to an embodiment of the present disclosure, may include four first fixing portions respectively fixed to one end of the outer side of the four side surfaces of the frame body 101. In the present disclosure, preferably, two first fixing portions 802 are fixed to the frame body 101 at the adjacent of two adjacent side surfaces, and two first fixing portions 802 on the other two adjacent side surfaces are diagonally disposed from the other two first fixing portions 802.

The shape memory alloy wires 801 may include four wires, and each wire 801 extends along the side of the frame 101 around the corresponding first fixing portion 802. And the extended upper and lower portions of each shape memory alloy wire 801 may be arranged in parallel. On the first fixing portion 802, a groove for accommodating and surrounding the shape memory alloy wire 801 may be provided.

The current input/output terminal 804 of the shape memory alloy wire 801 extends to the other end of the outer surface of the frame 101. The four shape memory alloy wires may all be in the same manner. Due to the arrangement mode of the first fixing part, every two of the current input and output ends of the four shape memory alloy wires are arranged at the position of a diagonal line. As shown in fig. 5, the current input/output end 804 may include a reinforcing portion (diameter-increased portion).

The current input/output terminal 804 of the shape memory alloy wire 801 may be fixed to the second fixing portion 803, and the second fixing portion 803 may be fixed to the sidewall portion 302 of the base 300. As shown in fig. 6, the second fixing portion 803 may include an embedded portion embedded into the side wall portion 302 and a protruding portion protruding from the embedded portion. The protruding portion may clamp the current input/output terminal 804 of the shape memory alloy wire 801, and the current input/output terminal 804 is connected to an external circuit at the position of the second fixing portion 803, thereby allowing current to flow in and out of the shape memory alloy wire 801. With the above arrangement, the upper and lower portions of each shape memory alloy wire 801 can be made substantially parallel to the outer side surface of the frame 101.

When the shape memory alloy wire 801 is energized (one of them is taken as an example), the shape memory alloy wire 801 will form an electromagnetic field. As schematically shown in fig. 7, the left side is a current input terminal, the right side is a current output terminal, and the magnetic field formed by the shape memory alloy wire 801 on the current inflow side is opposite to the magnetic field formed by the shape memory alloy wire 801 on the current outflow side, so that the electromagnetic fields formed by the two parts of the shape memory alloy wire 801 can cancel each other, thereby eliminating the generated electromagnetic noise, and thus performing control and the like more accurately.

When the shape memory alloy wire 801 is energized, the frame 101 is moved in the horizontal direction. In the present disclosure, two lens holding cylinder position detecting devices 600 are provided, for example, one lens holding cylinder position detecting device 600 is provided at the upper right of fig. 1, and one lens holding cylinder position detecting device 600 is provided at the lower left of fig. 1. The detailed description of the lens holding cylinder position detecting apparatus 600 can be referred to above. When the frame body 101 moves in the horizontal direction, the lens holding cylinder 100 is driven to move in the horizontal direction, the movement in the X direction can be controlled by detecting a feedback signal by the lens holding cylinder position detecting device 600 disposed at the upper right, and the movement in the Y direction can be controlled by detecting a feedback signal by the lens holding cylinder position detecting device 600 disposed at the lower left.

According to an embodiment of the present disclosure, there is also provided a method of installing the shape memory alloy wire, as an example.

Conventionally, in order to install a shape memory alloy wire by drawing, the memory alloy wire is generally drawn by applying a current and then installed. For example, a current of 42mA is applied in advance, and the shape memory alloy wire is stretched by the current, which causes a loss of power or the like.

According to the mounting method disclosed by the present disclosure, the shape memory alloy wire is firstly sleeved on the first fixing portion 802(180 ° bypass), then the two strip-shaped memory alloy wires are respectively made to bypass the stretching column 901 by 90 °, and the shape memory alloy wire is stretched by the weight arranged at the end of the two strip-shaped memory alloy wires. The weight of the weight can be selected according to the actual design, and for example, a 10g weight can be used.

After the shape memory alloy wire is completely stretched, the shape memory alloy wire 801 is fixed to the second fixing portion 803 in the vicinity of the stretching column 901. The weight 902 and/or excess shape memory alloy wire is then removed.

According to another embodiment of the present disclosure, there is provided a camera apparatus including the lens driving apparatus described above; at least one lens secured within the lens support barrel; and an image sensor receiving light passing through the at least one lens.

According to still another embodiment of the present disclosure, there is also provided an electronic apparatus, which may include the above-described camera device.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Description of the reference numerals

100 lens holding cylinder

101 frame body

200 shell

300 base

301 bottom

302 side wall part

400 actuator

401 substrate

402 piezoelectric element

403 silicon rubber

404 charge pump

500 guide support ball member

501 first ball member

502 second ball member

600 position detection device

601 Hall magnet

602 hall sensor

700 flexible circuit board

701 interface end

801 shape memory alloy wire

802 first fixed part

803 second fixing part

804 current input/output terminal

901 stretching column

902 weight

5011 Upper ball

5012 middle ball

5013 lower ball

5021 Upper ball

5022 middle ball

5023 lower ball

Claims

1. A lens driving device, comprising:

a lens support barrel for holding at least one lens;

a frame body provided outside the lens support cylinder;

2. The lens driving device according to claim 1, wherein two extension lines of the shape memory alloy wire that bypass the first fixing portion are parallel to each other.

3. The lens driving device according to claim 2, wherein two of the four first fixing portions fixed to the adjacent two outer side surfaces of the frame are disposed adjacent to each other, and the other two fixing portions are disposed adjacent to each other, and the two fixing portions and the other two fixing portions are disposed in a diagonal line with respect to the frame.

4. The lens driving device according to claim 3, wherein the current input and output terminals of the four shape memory alloy wires are arranged adjacent to each other in pairs and arranged in a diagonal manner.

5. The lens driving apparatus according to any one of claims 1 to 4, further comprising:

6. The lens driving apparatus as claimed in claim 5, wherein the actuator is a piezoceramic actuator.

7. The lens driving apparatus as claimed in claim 5, wherein the first ball member and the second ball member respectively include three balls arranged in the optical axis direction, and the upper ball and the lower ball have the same diameter and are larger than or equal to the diameter of the middle ball.

8. The lens driving device according to claim 1, further comprising a lens support barrel position detecting device including a Hall magnet and a Hall sensor, the Hall magnet being located on the lens support barrel, the Hall sensor being located below the Hall magnet in the optical axis direction,

9. The lens driving apparatus as claimed in claim 7, wherein the upper and lower balls of the first ball member are in close fitting contact with the outer sidewall of the lens holding cylinder and the inner sidewall of the sidewall portion of the base to prevent rotation of the lens holding cylinder, and the upper and lower balls of the second ball member are in redundant fitting contact with the outer sidewall of the lens holding cylinder and the inner sidewall of the sidewall portion of the base to provide a mounting margin.

10. A camera apparatus, comprising:

the lens driving device according to any one of claims 1 to 9;

at least one lens secured within the lens support barrel; and

an image sensor to receive light passing through the at least one lens.