CN210053464U

CN210053464U - SMA anti-shake actuator structure

Info

Publication number: CN210053464U
Application number: CN201920698495.8U
Authority: CN
Inventors: 沈文振; 吴承諹; 陈周聪
Original assignee: Xiamen Xinhongzhou Precision Technology Co Ltd
Current assignee: Xiamen Xinhongzhou Precision Technology Co Ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-02-11
Anticipated expiration: 2029-05-15

Abstract

The utility model discloses a SMA anti-shake actuator structure, its characterized in that: comprises a movable plate, a fixed plate and a plurality of memory alloy wires; the movable plate is movably erected on the fixed plate, and the fixed plate is provided with at least two supporting parts for supporting the movable plate; the fixing plate is coated with a LDS coating, the upper end and the lower end of each memory alloy wire are arranged in a staggered mode, and the upper end and the lower end of each memory alloy wire are respectively connected with the movable plate and the movable plate; an input contact electrically connected with the lower end of the memory alloy wire is formed on the LDS coating; and the movable plate is provided with an output contact electrically connected with the upper end of the memory alloy wire. The utility model has the advantage of low production cost.

Description

SMA anti-shake actuator structure

Technical Field

The utility model relates to an optics anti-shake field especially indicates a SMA anti-shake actuator structure.

Background

The miniature automatic focusing camera is widely applied to products such as mobile phones, automobiles, unmanned planes, security monitoring, smart homes and the like. The common micro automatic focusing camera is driven by a voice coil motor to move along the optical axis; the general voice coil motor mainly comprises a shell, a lens support movably matched in the shell, a driving coil matched on the lens support and at least two driving magnets fixed in the shell, wherein a lens is fixed on the lens support, the shell is provided with a light through hole opposite to the lens, and when the voice coil motor is used, the current input to the driving coil is controlled through a control chip so as to drive the driving magnet and the driving coil to interact to drive the lens support to move, so that the function of automatic focusing is realized.

However, when the camera is used for photographing and shooting, the lens cannot be kept absolutely stable due to human shake or other reasons, a certain offset is generated, and at the moment, the focusing and the light incoming amount of the camera are affected, so that the quality of the image acquired by the camera is affected.

For this reason, anti-shake actuators have been developed, which can drive a voice coil motor to move in a direction perpendicular to the optical axis of a lens, thereby compensating for the deviation of the lens caused by human shake or other causes. The existing SMA anti-shake actuator utilizes the heat-shrinkage and cold-expansion characteristics of a memory alloy wire to drive a voice coil motor to move along the direction vertical to the optical axis of a lens; the conventional SMA anti-shake actuator comprises a movable plate, a fixed plate, a flexible circuit board and a plurality of memory alloy wires; the movable plate is used for fixing the voice coil motor, the movable plate is movably erected on the fixed plate, and at least two supporting parts for supporting the movable plate are arranged on the fixed plate; the flexible circuit board is bonded on the fixed plate, the upper end and the lower end of each memory alloy wire are arranged in a staggered mode, and the upper end and the lower end of each memory alloy wire are respectively connected with the movable plate and the flexible circuit board; an input contact electrically connected with the lower end of the memory alloy wire is formed on the flexible circuit board; and the movable plate is provided with an output contact electrically connected with the upper end of the memory alloy wire. The control chip is used for electrifying each memory alloy wire through the output contact and the output contact, and the memory alloy wires can be contracted when heated, so that the movable plate can be pulled to move relative to the fixed plate when the memory alloy is contracted, the control chip can control the electrifying time of each memory alloy wire by the power supply circuit to change the temperature of the memory alloy wire, the length of the memory alloy wire is changed, and then the voice coil motor fixed on the movable plate is controlled to move, so that the voice coil motor moves to a specified position to compensate offset generated by shaking. However, the manufacturing process of the flexible circuit board is complex, so that the production cost of the flexible circuit board is high, and the overall production cost of the existing SMA anti-shake actuator is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a SMA anti-shake actuator structure, it has low in production cost's advantage.

In order to achieve the above purpose, the solution of the present invention is:

an SMA anti-shake actuator structure comprises a movable plate, a fixed plate and a plurality of memory alloy wires; the movable plate is movably erected on the fixed plate, and the fixed plate is provided with at least two supporting parts for supporting the movable plate; the fixing plate is coated with a LDS coating, the upper end and the lower end of each memory alloy wire are arranged in a staggered mode, and the upper end and the lower end of each memory alloy wire are respectively connected with the movable plate and the movable plate; an input contact electrically connected with the lower end of the memory alloy wire is formed on the LDS coating; and the movable plate is provided with an output contact electrically connected with the upper end of the memory alloy wire.

A first elastic arm and a second elastic arm are respectively formed on two opposite side edges of the movable plate, and a first connecting part and a second connecting part are respectively formed on two opposite diagonal angles of the movable plate; the two output contacts are divided into a first output contact arranged on the first elastic arm and a second output contact arranged on the second elastic arm; a first fixing part and a second fixing part are respectively formed at two opposite corners of the fixing plate, and the first fixing part and the second fixing part are arranged in a staggered manner with the first connecting part and the second connecting part; the LDS coating comprises four input contacts, wherein the four input contacts are divided into a first input contact and a second input contact which are positioned on a first fixing part, and a third input contact and a fourth input contact which are positioned on a second fixing part; a first common contact and a second common contact which correspond to the first output contact and the second output contact respectively are also formed on the LDS coating, and the first output contact and the second output contact are fixed on the first common contact and the second common contact respectively and are electrically connected with the first common contact and the second common contact respectively; the number of the memory alloy wires is four, and the four memory alloy wires are divided into a first memory alloy wire, a second memory alloy wire, a third memory alloy wire and a fourth memory alloy wire; the upper end of the first memory alloy wire and the upper end of the third memory alloy wire are fixed on the first connecting part, the upper end of the first memory alloy wire and the upper end of the third memory alloy wire are electrically connected with the first output contact, the lower end of the first memory alloy wire and the lower end of the third memory alloy wire are respectively fixed on the first fixing part and the second fixing part, and the lower end of the first memory alloy wire and the lower end of the third memory alloy wire are respectively electrically connected with the first input contact and the third input contact; the upper end of the second memory alloy wire and the upper end of the fourth memory alloy wire are fixed on the second connecting portion, the upper end of the second memory alloy wire and the upper end of the fourth memory alloy wire are electrically connected with the second output contact, the lower end of the second memory alloy wire and the lower end of the fourth memory alloy wire are respectively fixed on the first fixing portion and the second fixing portion, and the lower end of the second memory alloy wire and the lower end of the fourth memory alloy wire are respectively electrically connected with the second input contact and the fourth input contact.

One side of the fixing plate is bent to form a wiring board, a first input terminal, a second input terminal, a third input terminal, a fourth input terminal and a common terminal which are positioned on the wiring board are formed on the LDS coating, and the first input terminal, the second input terminal, the third input terminal and the fourth input terminal are respectively and electrically connected with a first input contact, a second input contact, a third input contact and a fourth input contact through four input circuits formed on the LDS coating; the common terminal is electrically connected to the first and second common contacts through a common line formed on the LDS coating layer.

The movable plate is also provided with a positive input conductive part and a negative input conductive part; a positive input contact electrically connected with the positive input conducting part and a negative input contact electrically connected with the negative input conducting part are respectively arranged on the first elastic arm and the second elastic arm; the LDS coating is provided with a positive input end and a negative input end which respectively correspond to the positive input contact and the negative input contact, and the positive input contact and the negative input contact are respectively fixed on the positive input end and the negative input end and are respectively electrically connected with the positive input end and the negative input end;

the LDS coating is also provided with a positive input terminal and a negative input terminal which are positioned on the wiring board, and the positive input terminal and the negative input terminal are respectively and electrically connected with the positive input end and the negative input end through two wires formed on the LDS coating.

The fixing plate is fixed on a bottom plate in a matching manner.

After the scheme of the adoption, the utility model discloses an adopt the LDS coating to replace the flexible circuit board that current SMA actuator adopted, and LDS coating accessible LDS technology forms the conducting wire on its surface, because LDS simple process, production efficiency are high, make the utility model discloses can effective reduction in production cost.

Drawings

Fig. 1 is an exploded view of the present invention;

fig. 2 is a schematic structural view of a movable plate of the present invention;

description of reference numerals:

a movable plate 1 is provided,

a first resilient arm 11, a first output contact 111, a positive input contact 112,

a second resilient arm 12, a second output contact 121, a negative input contact 122,

the first connection portion 13 is provided at a position,

the second connecting portion 14 is provided at a position,

a positive input conductive portion 15 is provided,

the negative input conductive part 16 is provided with,

a fixing plate 2, a support portion 21, a first fixing portion 22, a second fixing portion 23, a wiring board 24,

the coating layer 3 of the LDS is coated,

a first input contact 311, a second input contact 312,

a third input contact 313, a fourth input contact 314,

the first common contact 321 is provided on the first common contact,

the second common contact 322 is provided on the second common contact,

a first input terminal 331, a second input terminal 332, a third input terminal 332, a fourth input terminal 334, a common terminal 335, a positive input terminal 336, a negative input terminal 337, a positive input terminal 341, a negative input terminal 342,

a memory alloy wire 4, a first memory alloy wire 41, a second memory alloy wire 42, a third memory alloy wire 43, a fourth memory alloy wire 44,

a bottom plate 5.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

As shown in fig. 1 and 2, the present invention discloses an SMA anti-shake actuator structure, which includes a movable plate 1, a fixed plate 2 and a plurality of memory alloy wires 4; the movable plate 2 is movably erected on the fixed plate 2, the fixed plate 2 is provided with at least two supporting parts 21 for supporting the movable plate, the supporting parts 21 are cylinders bonded on the fixed plate 2 through glue, and the fixed plate 2 can be fixed on a bottom plate 5 in a matching manner; the surface of the fixing plate 2 is coated with a layer of LDS coating 3, the LDS coating 3 is a coating capable of forming a conductive circuit on the surface thereof through an LDS process, the LDS process is a laser direct forming process, the laser direct forming process is the prior art, and no specific description is provided here, and the LDS coating 3 can be formed by curing an LPKFProtopaint LDS coating of the Germany LPKF company; the upper end and the lower end of each memory alloy wire 4 are arranged in a staggered manner, and the upper end and the lower end of each memory alloy wire 4 are respectively connected with the movable plate 1 and the fixed plate 2; an input contact electrically connected with the lower end of the memory alloy wire 4 is formed on the LDS coating 3 through an LDS process, an output contact electrically connected with the upper end of the memory alloy wire 4 is arranged on the movable plate 1, and a power supply circuit controlled by an external controller can supply power to each memory alloy wire 4 through the input contact and the output contact so as to control each memory alloy wire 4 to stretch and retract, so that the movable plate 1 moves relative to the fixed plate 2.

Specifically, a first elastic arm 11 and a second elastic arm 12 are respectively formed on two opposite sides of the movable plate 1, and a first connecting portion 13 and a second connecting portion 14 are respectively formed on two opposite corners of the movable plate 1; the number of the output contacts is two, and the two output contacts are divided into a first output contact 111 arranged on the first elastic arm 11 and a second output contact 121 arranged on the second elastic arm 12. Two opposite corners of the fixing plate 2 are respectively provided with a first fixing part 22 and a second fixing part 23, the first fixing part 22 and the second fixing part 23 are arranged in a staggered manner with the first connecting part 13 and the second connecting part 14, the number of the input contacts of the LDS coating 3 is four, and the four input contacts are divided into a first input contact 311 and a second input contact 312 which are formed on the first fixing part 22 through an LDS process and a third input contact 313 and a fourth input contact 314 which are formed on the second fixing part 23 through the LDS process; the LDS coating is further formed with a first common contact 321 and a second common contact 322 corresponding to the first output contact 111 and the second output contact 121, respectively, through an LDS process, and the first output contact 111 and the second output contact 121 are fixed on the first common contact 321 and the second common contact 322, respectively, through welding or conductive adhesive bonding, and are electrically connected to the first common contact 321 and the second common contact 322, respectively. Four memory alloy wires 4 are provided, and the four memory alloy wires 4 are divided into a first memory alloy wire 41, a second memory alloy wire 42, a third memory alloy wire 43 and a fourth memory alloy wire 44; the upper end of the first memory alloy wire 41 and the upper end of the third memory alloy wire 43 are fixed on the first connecting part 13, the upper end of the first memory alloy wire 41 and the upper end of the third memory alloy wire 43 are electrically connected with the first output contact 111 through a connecting circuit, the lower end of the first memory alloy wire 41 and the lower end of the third memory alloy wire 43 are respectively fixed on the first fixing part 22 and the second fixing part 23, and the lower end of the first memory alloy wire 41 and the lower end of the third memory alloy wire 43 are respectively electrically connected with the first input contact 311 and the third input contact 313 through welding or conductive adhesive bonding; the upper end of the second memory alloy wire 42 and the upper end of the fourth memory alloy wire 44 are fixed on the second connecting portion 14, the upper end of the second memory alloy wire 42 and the upper end of the fourth memory alloy wire 44 are electrically connected with the second output contact 121 through a connecting circuit, the lower end of the second memory alloy wire 42 and the lower end of the fourth memory alloy wire 44 are respectively fixed on the first fixing portion 22 and the second fixing portion 23 and are respectively electrically connected with the second input contact 312 and the fourth input contact 314 through welding or conductive adhesive bonding, so that the first memory alloy wire 41 can be energized through the first input contact 311 and the first common contact 321, the second memory alloy wire 42 can be energized through the second input contact 311 and the second common contact 322, the third memory alloy wire 43 can be energized through the third input contact 313 and the first common contact 321, the fourth memory alloy wire 44 may be energized through the fourth input contact 314 and the second common contact 322. The first connecting portion 13 can fix the upper end of the first memory alloy wire 41 and the upper end of the third memory alloy wire 43 in a clamping manner, the second connecting portion 14 can fix the upper end of the second memory alloy wire 42 and the upper end of the fourth memory alloy wire 44 in a clamping manner, the first fixing portion 22 can fix the lower end of the first memory alloy wire 41 and the lower end of the second memory alloy wire 42 in a clamping manner, and the second fixing portion 23 can fix the lower end of the third memory alloy wire 43 and the lower end of the fourth memory alloy wire 44 in a clamping manner.

Further, one side of the fixing plate 3 is bent to form a wiring board 24, a first input terminal 331, a second input terminal 332, a third input terminal 332, a fourth input terminal 334 and a common terminal 335 on the wiring board 24 are formed on the LDS coating 3 through the LDS process, and the first input terminal 331, the second input terminal 332, the third input terminal 333 and the fourth input terminal 334 are respectively electrically connected with the first input contact 311, the second input contact 312, the third input contact 313 and the fourth input contact 314 through four input lines formed on the LDS coating 3 through the LDS process; the common terminal 335 is electrically connected to the first common contact 321 and the second common contact 322 through a common line formed on the LDS coating 3 by using the LDS process, such that the first memory alloy wire 41 can be energized through the first input terminal 331 and the common terminal 335, the second memory alloy wire 42 can be energized through the second input terminal 332 and the common terminal 335, the third memory alloy wire 43 can be energized through the third input terminal 332 and the common terminal 335, and the fourth memory alloy wire 44 can be energized through the fourth input terminal 334 and the common terminal 335; the first input terminal 331, the second input terminal 332, the third input terminal 332, the fourth input terminal 334 and the common terminal 335 are all located on the wiring board 24, so that an external power supply line can be connected with the first input terminal 331, the second input terminal 332, the third input terminal 332, the fourth input terminal 334 and the common terminal 335 conveniently.

Further, the movable plate 1 is further provided with a positive input conductive part 15 and a negative input conductive part 16, and the positive input conductive part 15 and the negative input conductive part 16 are used for supplying power to the voice coil motor matched on the movable plate 1; a positive input contact 112 electrically connected with the positive input conductive part 15 and a negative input contact 122 electrically connected with the negative input conductive part 16 are respectively arranged on the first elastic arm 11 and the second elastic arm 12; a positive input end 341 and a negative input end 342 which correspond to the positive input contact 112 and the negative input contact 122 respectively are formed on the LDS coating 3 through an LDS process, and the positive input contact 112 and the negative input contact 122 are fixed on the positive input end 341 and the negative input end 342 respectively through welding or conductive adhesive bonding and are electrically connected with the positive input end 341 and the negative input end 342 respectively; the wiring board 24 is further formed with a positive input terminal 336 and a negative input terminal 337, and the positive input terminal 336 and the negative input terminal 337 are electrically connected to the positive input end 341 and the negative input end 342, respectively, through two traces formed on the LDS coating 3 by using the LDS process.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.

Claims

1. An SMA anti-shake actuator structure, characterized by: comprises a movable plate, a fixed plate and a plurality of memory alloy wires; wherein

The movable plate is movably erected on the fixed plate, and the fixed plate is provided with at least two supporting parts for supporting the movable plate;

the fixing plate is coated with a LDS coating, the upper end and the lower end of each memory alloy wire are arranged in a staggered mode, and the upper end and the lower end of each memory alloy wire are respectively connected with the movable plate and the movable plate; an input contact electrically connected with the lower end of the memory alloy wire is formed on the LDS coating; and the movable plate is provided with an output contact electrically connected with the upper end of the memory alloy wire.

2. An SMA anti-shake actuator arrangement according to claim 1, wherein: a first elastic arm and a second elastic arm are respectively formed on two opposite side edges of the movable plate, and a first connecting part and a second connecting part are respectively formed on two opposite diagonal angles of the movable plate; the two output contacts are divided into a first output contact arranged on the first elastic arm and a second output contact arranged on the second elastic arm;

a first fixing part and a second fixing part are respectively formed at two opposite corners of the fixing plate, and the first fixing part and the second fixing part are arranged in a staggered manner with the first connecting part and the second connecting part; the LDS coating comprises four input contacts, wherein the four input contacts are divided into a first input contact and a second input contact which are positioned on a first fixing part, and a third input contact and a fourth input contact which are positioned on a second fixing part; a first common contact and a second common contact which correspond to the first output contact and the second output contact respectively are also formed on the LDS coating, and the first output contact and the second output contact are fixed on the first common contact and the second common contact respectively and are electrically connected with the first common contact and the second common contact respectively;

the number of the memory alloy wires is four, and the four memory alloy wires are divided into a first memory alloy wire, a second memory alloy wire, a third memory alloy wire and a fourth memory alloy wire; the upper end of the first memory alloy wire and the upper end of the third memory alloy wire are fixed on the first connecting part, the upper end of the first memory alloy wire and the upper end of the third memory alloy wire are electrically connected with the first output contact, the lower end of the first memory alloy wire and the lower end of the third memory alloy wire are respectively fixed on the first fixing part and the second fixing part, and the lower end of the first memory alloy wire and the lower end of the third memory alloy wire are respectively electrically connected with the first input contact and the third input contact; the upper end of the second memory alloy wire and the upper end of the fourth memory alloy wire are fixed on the second connecting portion, the upper end of the second memory alloy wire and the upper end of the fourth memory alloy wire are electrically connected with the second output contact, the lower end of the second memory alloy wire and the lower end of the fourth memory alloy wire are respectively fixed on the first fixing portion and the second fixing portion, and the lower end of the second memory alloy wire and the lower end of the fourth memory alloy wire are respectively electrically connected with the second input contact and the fourth input contact.

3. An SMA anti-shake actuator arrangement according to claim 2, wherein: one side of the fixing plate is bent to form a wiring board, a first input terminal, a second input terminal, a third input terminal, a fourth input terminal and a common terminal which are positioned on the wiring board are formed on the LDS coating, and the first input terminal, the second input terminal, the third input terminal and the fourth input terminal are respectively and electrically connected with a first input contact, a second input contact, a third input contact and a fourth input contact through four input circuits formed on the LDS coating; the common terminal is electrically connected to the first and second common contacts through a common line formed on the LDS coating layer.

4. An SMA anti-shake actuator arrangement according to claim 3, wherein: the movable plate is also provided with a positive input conductive part and a negative input conductive part; a positive input contact electrically connected with the positive input conducting part and a negative input contact electrically connected with the negative input conducting part are respectively arranged on the first elastic arm and the second elastic arm; the LDS coating is provided with a positive input end and a negative input end which respectively correspond to the positive input contact and the negative input contact, and the positive input contact and the negative input contact are respectively fixed on the positive input end and the negative input end and are respectively electrically connected with the positive input end and the negative input end;

5. An SMA anti-shake actuator arrangement according to claim 1, wherein: the fixing plate is fixed on a bottom plate in a matching manner.