CN213023718U

CN213023718U - SMA actuator, camera module having the same, and electronic apparatus

Info

Publication number: CN213023718U
Application number: CN202021512485.XU
Authority: CN
Inventors: 刘述伦; 耿新龙; 蔡日新
Original assignee: Dongguan Yadeng Electronics Co Ltd
Current assignee: Guangdong haideya Technology Co.,Ltd.
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-04-20
Anticipated expiration: 2030-07-27

Abstract

The utility model discloses an SMA actuator and a camera module and an electronic device with the same, wherein the SMA actuator comprises an SMA wire which can be electrified and contracted; the rotating part comprises a rotating part and a connecting part which are connected with each other, the rotating part is provided with a rotating connecting structure, and the connecting part is used for connecting a driven part; and the fixing piece is connected with the rotating part through the SMA wire. The utility model discloses a SAM actuator simple structure is small and exquisite, can adapt to the miniaturization requirement to because it realizes driven through SMA line circular telegram shrink, consequently for electromagnetic motor, it can effectively avoid producing electromagnetic interference.

Description

SMA actuator, camera module having the same, and electronic apparatus

Technical Field

The utility model relates to an electron field, in particular to SMA actuator and have its camera module and electronic equipment.

Background

Actuators are often used in electronic devices to drive some components to move, so as to achieve a certain adjustment function, for example, an actuator is used in a camera module to drive a lens or a mirror to achieve anti-shake or focusing adjustment; at present, actuating devices which are commonly used in electronic equipment and drive components to rotate are generally electromagnetic motors, but the structures of the electromagnetic motors are generally complex, and the existing electromagnetic motors are more and more difficult to meet the requirement of miniaturization along with the thinner electronic equipment; in addition, the electromagnetic motor is easy to generate electromagnetic interference during operation, thereby affecting the normal operation of other electronic devices to a certain extent.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least, for this reason, the utility model provides a simple structure, can adapt to miniaturized requirement and be difficult for producing electromagnetic interference's SMA actuator.

The utility model also provides a camera module and electronic equipment of having above-mentioned SMA actuator.

An SMA actuator according to an embodiment of the first aspect of the invention comprises: SMA wire, can be electrified and contracted; the rotating part comprises a rotating part and a connecting part which are connected with each other, the rotating part is provided with a rotating connecting structure, and the connecting part is used for connecting a driven part; and the fixing piece is connected with the rotating part through the SMA wire.

An SMA actuator according to an embodiment of the first aspect of the invention has at least the following advantageous effects: when the SAM actuator is used for driving, firstly, the fixed piece is fixed with a shell or other parts of the electronic equipment, then the rotating piece is rotatably connected with the shell or other parts of the electronic equipment through the rotating connection structure, the driven piece is connected to the connecting part, then the SMA wire is electrified to contract, and the driven piece can be driven to rotate by the rotating piece; the SAM actuator has a simple and small structure, can meet the miniaturization requirement, and can effectively avoid generating electromagnetic interference compared with an electromagnetic motor because the SAM actuator is driven by electrifying and contracting the SMA wire.

According to some embodiments of the utility model, two the mounting is a set of, with two mounting symmetries in a set of set up in the portion both sides rotate, the mounting is provided with a set ofly at least.

According to some embodiments of the present invention, the SMA wire is connected at both ends thereof to the fixing member, and the rotation portion is connected to the fixing member.

According to some embodiments of the invention, the SMA wire is connected to the rotating part at one end and to the fixing part at the other end.

According to some embodiments of the invention, the rotating member comprises an elastic arm, one end of the elastic arm is fixed, and the other end of the elastic arm is connected to the rotating portion.

According to some embodiments of the invention, the elastic arm is provided with a fixing plate.

According to some embodiments of the utility model, the elastic arm is provided with two, and the symmetry sets up the rotation portion both sides.

According to some embodiments of the utility model, still including the ball, rotate connection structure be with ball complex spherical recess or connecting hole.

A camera module according to a second aspect of the present invention includes the SMA actuator of the first aspect of the present invention.

According to the utility model discloses a camera module of second aspect embodiment has following beneficial effect at least: by adopting the SMA actuator in the camera module, the structure of the camera module can be more suitable for the requirement of miniaturization, and the electromagnetic interference caused to an optical sensor and the like in the camera module can be avoided.

According to a third aspect embodiment of the present invention, an electronic device includes the SMA actuator described in the first aspect embodiment.

According to the utility model discloses a camera module of third aspect embodiment has following beneficial effect at least: by adopting the SMA actuator in the electronic equipment, the structure of the electronic equipment can be more easily miniaturized, and electromagnetic interference on other electronic elements in the electronic equipment can be avoided.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an SMA actuator according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an SMA actuator according to a second embodiment of the present invention;

fig. 3 is a schematic structural view of an SMA actuator according to a third embodiment of the present invention;

fig. 4 is a schematic structural view of an SMA actuator according to a fourth embodiment of the invention;

fig. 5 is a schematic structural diagram of an SMA actuator according to a fifth embodiment of the present invention.

Reference numerals:

SMA wire 10, rotating member 20, fixed member 30, ball 40;

a rotating part 210, a connecting hole 211, a connecting part 220, an elastic arm 230, and a fixing plate 240.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 5, an SMA actuator according to an embodiment of the first aspect of the invention comprises: the SMA wire 10, the rotating piece 20 and the fixed piece 30, wherein the SMA wire 10 can be electrified and contracted; the rotating member 20 comprises a rotating part 210 and a connecting part 220 which are connected with each other, the rotating part 210 is provided with a rotating connecting structure, and the connecting part 220 is used for connecting a driven member; the fixing member 30 is connected to the rotating part 210 through the SMA wire 10.

When the SAM actuator is used for driving, the fixed member 30 is first fixed to a housing or other parts of an electronic device, the rotating member 20 is then rotatably connected to the housing or other parts of the electronic device through the rotating connection structure, the driven member is connected to the connecting portion 220, and the SMA wire 10 is then energized to contract the SMA wire 10, so that the driven member can be driven to rotate by the rotating member 20.

In some embodiments of the present invention, two of the fixing members 30 are in a group, two fixing members 30 in the same group are symmetrically disposed on two sides of the rotating portion 210, and at least one group of the fixing members 30 is disposed; the fixing members 30 are disposed on two sides of the rotating portion 210, so that the rotating portion 210 can be driven to rotate in two opposite directions, and the two fixing members 30 in the same group are symmetrically disposed on two sides of the rotating portion 210, so that the control of the SMA actuator can be facilitated.

Specifically, as shown in fig. 1, the SMA actuator according to the first embodiment of the present invention is provided with a set of fixing members 30, and each fixing member 30 is connected to the rotating portion 210 through the SMA wire 10.

Of course, according to practical circumstances, when the driving torque required for the driven member is large, a form in which a plurality of fixing members 30 and SMA wires 10 are provided on both sides of the rotating portion 210 may be selected to increase the driving torque by contraction of the plurality of SMA wires 10; specifically, as shown in fig. 4, the SMA actuator according to the fourth embodiment of the present invention is provided with two sets of fixing members 30, and each fixing member 30 is connected to the rotating portion 210 through the SMA wire 10.

The fixing member 30 connected to the rotating part 210 through the SMA wire 10 may have various forms; in some embodiments of the present invention, as shown in fig. 2, two ends of the SMA wire 10 are respectively connected to two of the fixing members 30 in the same group, and the rotating portion 210 is connected in the middle; of course, according to practical circumstances, in other embodiments of the present invention, as shown in fig. 1, one end of the SMA wire 10 may be connected to the rotating portion 210, the other end of the SMA wire may be connected to the fixing member 30, and each fixing member 30 is connected to the rotating portion 210 through one SMA wire 10.

The method of connecting the SMA wire 10 to the fixing member 30 or the rotating portion 210 may be various, as long as it can ensure that the SMA wire 10 is firmly connected to the fixing member 30 or the rotating portion 210 without loosening, for example: as shown in fig. 1 or 2, in some embodiments of the present invention, the SMA wire 10 may be fixedly connected to the fixing member 30 or the rotating part 210 directly by welding; of course, as shown in fig. 3, in other embodiments, the fixing member 30 and the rotating portion 210 may be bent and the SMA wire 10 may be fixed by clamping.

In some embodiments of the present invention, as shown in fig. 2, the rotating member 20 includes an elastic arm 230, one end of the elastic arm 230 is fixed, and the other end of the elastic arm 230 is connected to the rotating portion 210, so that the rotating member 20 can be automatically restored to the initial position by the elastic arm 230 when the SMA wire 10 is not energized by the elastic restoring force of the elastic arm 230; in order to fix one end of the elastic member, a fixing piece 240 is disposed at one end of the elastic arm 230 away from the rotating portion 210. In order to better keep the rotating part 210 at the center position between two fixing members 30 of the same group, two elastic arms 230 are provided and symmetrically arranged at both sides of the rotating part 210. In order to further improve the elastic deformation capability of the elastic arm 230, at least one arch structure formed by bending is provided on the elastic arm 230.

The rotating connection structure of the rotating part 210 may be a connection hole 211 provided on the rotating part 210, or may be a connection shaft, or may be a spherical groove provided on the rotating part 210, or a spherical protrusion provided on the rotating part 210, which is only required to facilitate the rotating connection between the rotating part 210 and the housing of the electronic device or other components; in some embodiments of the present invention, as shown in fig. 5, the SMA actuator further includes a ball 40, the rotation connection structure is a connection hole 211 or a spherical groove disposed on the rotation portion 210, the ball 40 is used for being embedded in a housing or other components of the electronic device, and the connection hole 211 or the spherical groove is sleeved on an outer surface of the ball 40, so as to realize the rotation connection of the rotation portion 210 and the housing of the electronic device by the cooperation of the ball 40 and the connection hole 211/the spherical groove.

A camera module according to an embodiment of the second aspect of the present invention, including the SMA actuator according to the embodiment of the first aspect, is described below.

By adopting the SMA actuator in the camera module, the structure of the camera module can be more suitable for the requirement of miniaturization, and the electromagnetic interference caused to an optical sensor and the like in the camera module can be avoided.

An electronic device according to an embodiment of the third aspect of the present invention, including the SMA actuator according to the embodiment of the first aspect, is described below.

By adopting the SMA actuator in the electronic equipment, the electronic equipment structure can be more easily miniaturized, and electromagnetic interference on other electronic elements in the electronic equipment can be avoided.

An SMA actuator according to an embodiment of the first aspect of the invention is described in detail below with reference to fig. 1 to 4 in a specific embodiment. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

The SMA actuator of the embodiment comprises a rotating part 20, a fixed part 30 and an SMA wire 10; the SMA wire 10 may be electrically contracted; the rotating member 20 includes a rotating portion 210, a connecting portion 220 and elastic arms 230, the rotating portion 210 is provided with a connecting hole 211 for realizing rotating connection, the connecting portion 220 is connected to one end of the rotating portion 210, the two elastic arms 230 are symmetrically arranged on two sides of the rotating portion 210, one end of each elastic arm 230 is connected to the rotating portion 210, and the other end of each elastic arm 230 is provided with a fixing piece 240 for fixing; the fixing members 30 are provided with four and are symmetrically arranged on two sides of the rotating portion 210 in two groups, the number of the SMA wires 10 is 2, two ends of each SMA wire 10 are respectively connected to the two symmetrical fixing members 30, and the middle of each SMA wire 10 is connected with the rotating portion 210.

According to the utility model discloses SMA actuator, can reach some technological effects as follows at least: the SAM actuator has a simple and small structure, can meet the miniaturization requirement, and can effectively avoid electromagnetic interference compared with an electromagnetic motor because the SAM actuator is driven by electrifying and contracting the SMA wire 10.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.

Claims

An SMA actuator, comprising:

an SMA wire (10) that can be electrically contracted;

the rotating part (20) comprises a rotating part (210) and a connecting part (220) which are connected with each other, the rotating part (210) is provided with a rotating connecting structure, and the connecting part (220) is used for connecting a driven part;

and a fixing member (30) connected to the rotating portion (210) through the SMA wire (10).
2. The SMA actuator according to claim 1, wherein two of the fixing members (30) are provided in one group, two fixing members (30) in the same group are symmetrically provided on both sides of the rotating portion (210), and at least one group of the fixing members (30) is provided.
3. The SMA actuator according to claim 1, wherein the SMA wires (10) are connected at both ends to the two fixed members (30) of the same group, respectively, and at the middle thereof to the rotating portion (210).
4. The SMA actuator according to claim 1, wherein the SMA wire (10) is connected at one end to the rotating portion (210) and at the other end to the fixed member (30).
5. The SMA actuator according to any one of claims 1 to 4, wherein the rotating member (20) comprises a resilient arm (230), one end of the resilient arm (230) being fixed and the other end being connected to the rotating part (210).
6. The SMA actuator according to claim 5, wherein an end of the resilient arm (230) remote from the rotating portion (210) is provided with a fixing tab (240).
7. The SMA actuator according to claim 5, wherein the elastic arms (230) are provided in two, symmetrically disposed on both sides of the rotating part (210).
8. An SMA actuator according to any one of claims 1 to 4, further comprising a ball (40), wherein the rotational connection is a spherical recess or connection hole (211) cooperating with the ball (40).
9. A camera module, characterized by: an SMA actuator as claimed in any one of claims 1 to 8.
10. An electronic device comprising an SMA actuator according to any one of claims 1 to 8.