CN114143436A

CN114143436A - Lens driving assembly

Info

Publication number: CN114143436A
Application number: CN202111524790.XA
Authority: CN
Inventors: 鲍和平; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Haoze Electronics Co ltd Kunshan Branch
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-03-04

Abstract

The invention discloses a lens driving assembly, which comprises a lens driving device, a motor module and a memory alloy driving device, wherein the lens driving device is used for mounting a lens and driving the lens to move, the motor module is arranged at the bottom of the lens driving device and supplies power to the lens driving device, and the memory alloy driving device is arranged at the bottom of the motor module and drives the motor module to move. According to the invention, the lens is driven to move by the lens driving device, and the motor module is driven to move by the memory alloy driving device, so that a better anti-shake effect can be realized, and higher imaging quality can be obtained.

Description

Lens driving assembly

Technical Field

The invention relates to the field of optics, in particular to a lens driving assembly.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have a function of taking pictures or recording videos. The use of these electronic devices is becoming more common and the design direction of these electronic devices is being developed to be more convenient and thinner to provide more choices for users. However, sometimes the photos shot in the current mobile phone shooting process are blurred, that is, the shot pictures are not clear enough, and even ghost images or blur occur. These causes, in addition to occasional defocus (i.e., the camera fails to focus properly), are largely due to slight jitter that occurs when the photographic scene is exposed.

Generally, such a slight shake often occurs in a handheld condition, and thus a lens deviation of the image pickup apparatus is caused, so that the quality of an image captured by the image sensor is deteriorated. Therefore, in recent years, the demand for developing the anti-shake function is relatively large.

However, most of the prior art implements the optical zoom and the optical anti-shake functions through the movement of the same component (carrier), and the movement range of the carrier is limited by weight, volume and the like, so that the trouble of taking blurred pictures due to hand shake in the shooting process cannot be effectively solved.

Disclosure of Invention

An object of the present invention is to provide a lens driving assembly to solve the above problems in the prior art.

In order to solve the above problems, according to an aspect of the present invention, there is provided a lens driving assembly, including a lens driving device, a motor module and a memory alloy driving device, wherein the lens driving device is used for mounting a lens and driving the lens to move, the motor module is disposed at the bottom of the lens driving device and supplies power to the lens driving device, and the memory alloy driving device is disposed at the bottom of the motor module and drives the motor module to move.

In one embodiment, the memory alloy driving device comprises a circuit board, a moving part and a memory alloy wire, the moving part comprises an outer frame and an inner plate, the outer frame and the inner plate are movably connected through an elastic piece, the outer frame is connected with the motor module and provided with an upper wire clamp, the circuit board is connected with the inner plate and provided with a lower wire clamp, and two ends of the memory alloy wire are fixedly connected with the upper wire clamp and the lower wire clamp respectively.

In one embodiment, the memory alloy driving device further comprises a support and a bottom plate, the bottom end of the support is connected with the upper surface of the bottom plate to form a moving space, and the circuit board, the moving part and the memory alloy wire are arranged in the moving space.

In one embodiment, the outer frame is provided with four upper wire clamps, the four upper wire clamps are arranged along one diagonal direction of the outer frame, the circuit board is provided with four lower wire clamps, the four lower wire clamps are arranged along the other diagonal direction of the outer frame, and the four upper wire clamps and the four lower wire clamps are connected through four memory alloy wires.

In one embodiment, the circuit board is provided with four independent input pins and one output pin, the four input pins are respectively connected with the four lower clips, and the one output pin is connected with an output mounting plate arranged in the middle of the circuit board.

In one embodiment, the four mutually independent output pins are arranged two by two on both sides of the one output pin.

In one embodiment, the memory alloy driving apparatus further includes an insulating plate disposed within the active space and disposed below the circuit board.

In one embodiment, the memory alloy driving device further includes a lower pad disposed in the active space and disposed between the inner plate of the movable member and the output mounting plate of the circuit board to connect the movable member with the circuit board.

In one embodiment, the memory alloy driving device further includes an upper pad frame disposed in the active space and disposed between the movable element and the motor module, wherein an outer frame of the movable element is connected to a bottom end of the upper pad frame, and a top end of the upper pad frame is connected to the motor module.

In one embodiment, the motor driving device comprises a carrier and a driving mechanism, wherein the carrier is used for mounting a lens, and the driving mechanism drives the carrier to move along the direction of an optical axis to realize optical zooming and drives the carrier to move on a plane vertical to the optical axis to realize optical anti-shake.

According to the invention, the lens is driven to move by the lens driving device, the motor module is driven by the memory alloy driving device and the imaging chip is driven to move, so that a better anti-shake effect can be realized and higher imaging quality can be obtained by combining the chip movement and the lens movement.

Drawings

Fig. 1 is an exploded perspective view of a lens driving assembly according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of a memory alloy actuator according to an embodiment of the present invention.

Fig. 3 is a perspective view of a memory alloy driving apparatus according to an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

The present disclosure generally relates to a lens driving assembly, which can be used in a terminal product such as a mobile phone and a tablet computer to cooperate with a lens to achieve functions of taking a picture and recording a video.

Fig. 1 is an exploded perspective view of a lens driving assembly 100 according to an embodiment of the present invention. As shown in fig. 1, the lens driving assembly 100 generally includes a lens driving device 10, a motor module 20 and a memory alloy driving device 30, wherein the motor module 20 is disposed below the lens driving device 10 and supplies power to the lens driving device 10, and the memory alloy driving device 30 is disposed below the motor module 20 and drives the motor module 20 to move.

The lens driving device 10 may be a general OIS motor, which generally includes a housing, a carrier, a base, a frame, a magnet and a coil, wherein the carrier is used for mounting a lens and is generally wound with a driving coil, the magnet is disposed on the housing or the frame, the base is generally provided with an anti-shake coil, the carrier is driven by the cooperation of the magnet and the driving coil to move along an optical axis direction to realize an optical zoom function, and the carrier is driven by the cooperation of the magnet and the anti-shake coil to move on a plane perpendicular to the optical axis to realize the optical anti-shake function.

Fig. 2 is an exploded perspective view of a memory alloy actuator 30 according to an embodiment of the present invention. As shown in fig. 2, in one embodiment, the memory alloy driving device 30 includes a circuit board 31, a movable element 32 and a memory alloy wire 33, the movable element 32 includes an outer frame 321 and an inner plate 322, the outer frame 321 is connected to the inner plate 322 through an elastic element 323, the outer frame 321 is connected to the motor module 20 and is provided with an upper clamp 324, the circuit board 31 is connected to the inner plate 322 and is provided with a lower clamp 311, and two ends of the memory alloy wire 33 are respectively fixedly connected to the upper clamp 324 and the lower clamp 311.

Optionally, the circuit board 31 is a flexible circuit board (FPC), and optionally, the elastic member 323 is a spring wire.

In one embodiment, the memory alloy driving device 30 further includes a support 34 and a bottom plate 35, a bottom end of the support 34 is connected with an upper surface of the bottom plate 35 to define a movable space 36, the circuit board 31, the movable element 32 and the memory alloy wire 33 are disposed in the movable space 36, and the motor module 20 rests on the support 34 and is located above the movable space 36, so that the circuit board 31, the movable element 32 and the memory alloy wire 33 are accommodated in the movable space 36 to perform a protection function. It should be noted that the movable space 36 is enclosed by the frame 34 and the bottom plate 35, and has a closed lower end and an open upper end for mounting the components.

Optionally, the outer frame 321 is provided with four upper clips 324, the four upper clips 324 are arranged along one diagonal direction of the outer frame 321, the circuit board 31 is provided with four lower clips 311, the four lower clips 311 are arranged along the other diagonal direction of the outer frame 321, and the four upper clips 324 and the four lower clips 311 are connected through four memory alloy wires 31.

One end of each memory alloy wire 33 is connected with the upper wire clamp 324, the other end of each memory alloy wire 33 is connected with the lower wire clamp 311, the four memory alloy wires 33 are arranged around the outer frame 321 to form a rectangle, the memory alloy wires 33 contract and deform after being electrified, the upper wire clamp 324 and the outer frame are pulled to move, so that the motor module 20 is driven to move, and after the memory alloy wires are powered off and return to the original state, the outer frame returns to the original state under the action of the elastic piece 323, and the motor module 20 is driven to return to the original state.

It should be noted that the concept of diagonal lines of the outer frame 321 is introduced herein for convenience of description, and is not intended to represent that the outer frame 321 has one line of entities.

In one embodiment, the circuit board 31 has an output mounting board 314 formed at the middle thereof and has four independent input pins 312 and an output pin 313, the four input pins 312 are respectively connected to the four clips 311, and the output pin 313 is connected to the output mounting board 314.

Alternatively, four mutually independent input pins 312 are arranged two by two on both sides of one output pin 313. The input pin 313 is used for connecting an external current to introduce the current, the output pin 313 is used for connecting the lower wire clamp 311 and transmitting the current to the memory alloy wire 33, when the input pin 313 is powered, the current sequentially passes through the input pin 312, the lower wire clamp 311, the memory alloy wire 33, the upper wire clamp 324, the elastic piece 323, the inner plate 322, the output mounting plate 314 and the output pin 313 to form a closed circuit, the memory alloy wire 33 contracts and deforms after being powered on, the upper wire clamp 324 and the outer frame 321 are pulled to move, the motor module 20 is driven to move, when the input pin is disconnected 312 and powered off, the memory alloy wire 33 returns to the original state, the outer frame 321 returns to the original state under the action of the elastic piece 323, and the motor module 20 is driven to return.

As shown in fig. 2, in one embodiment, the memory alloy driving device 30 further includes an insulating plate 37, and the insulating plate 37 is disposed in the active space 36 and disposed below the circuit board 31. The insulating plate 37 is connected to the middle of the upper surface of the bottom plate 35, the circuit board 31 is disposed above the insulating plate 37, and the movable member 32 is disposed above the circuit board 31 and connected by the memory alloy wire 33.

In one embodiment, the memory alloy driving device 30 further includes a lower pad 38, and the lower pad 38 is disposed in the movable space 36 and disposed between the inner plate 322 of the movable member 32 and the output mounting plate 315 of the circuit board 31 to connect the movable member 32 with the circuit board 31, so that the middle portion of the movable member 33 is connected with the circuit board 31 through the lower pad 38.

Alternatively, the output mounting plate 314 of the circuit board 31 and the inner plate 322 of the movable element 32 have matching shapes and sizes, and the lower pad 38 has matching shapes and sizes with the output mounting plate 314 of the circuit board 31 and the inner plate 322 of the movable element 32, so that the output mounting plate 314 of the circuit board 31 and the inner plate 322 of the movable element 32 can be conveniently connected through the lower pad.

In one embodiment, the memory alloy driving device 30 further includes an upper cushion frame 39, the upper cushion frame 39 is disposed in the movable space 36 and disposed between the movable element 32 and the motor module 20, wherein the outer frame 321 of the movable element 32 is connected to the bottom end of the upper cushion frame 39, and the top end of the upper cushion frame 39 is connected to the motor module 20. The edge of the movable element 32 is connected with the bottom end of the upper cushion frame 39, and the top end of the upper cushion frame 39 is connected with the motor module 20.

Alternatively, the upper gasket frame 39 has a shape and a size matched with the outer frame 321 of the movable piece 32, so that the outer frame 39 of the movable piece 32 can be conveniently connected with the motor module 20 through the upper gasket frame 39.

Fig. 3 is a perspective view of a memory alloy actuator 30 according to an embodiment of the present invention. As shown in fig. 1-3, when power is supplied to the input pin 312, current sequentially passes through the input pin 312, the lower clip 313, the memory alloy wire 33, the upper clip 324, the outer frame 321, the elastic member 323, the inner plate 323, the lower pad 38, the output mounting plate 314, and the output pin 313 to form a closed circuit, the memory alloy wire 33 contracts and deforms after being powered on, and pulls the upper clip 324 and the outer frame 321 to move, so as to drive the upper pad frame 39 and the motor module 20 to move, and when the input pin 312 is powered off, the memory alloy wire 33 returns to the original state, and the outer frame 321 returns to the original state under the action of the elastic member 323.

Through supplying power to different input pins 312, the power-on operation to different memory alloy wires 33 is realized, so that the motor module 20 rotates around the directions of the X axis and the Y axis, and simultaneously moves in cooperation with the X axis, the Y axis and the Z axis of the lens driving device 10, thereby having higher anti-shake effect and realizing higher imaging quality.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the invention can be effected therein by those skilled in the art after reading the above teachings of the invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. The lens driving assembly is characterized by comprising a lens driving device, a motor module and a memory alloy driving device, wherein the lens driving device is used for installing a lens and driving the lens to move, the motor module is arranged at the bottom of the lens driving device and supplies power to the lens driving device, and the memory alloy driving device is arranged at the bottom of the motor module and drives the motor module to move.

2. The lens driving assembly according to claim 1, wherein the memory alloy driving device includes a circuit board, a moving member, and a memory alloy wire, the moving member includes an outer frame and an inner plate, the outer frame and the inner plate are movably connected by an elastic member, the outer frame is connected to the motor module and provided with an upper wire clamp, the circuit board is connected to the inner plate and provided with a lower wire clamp, and two ends of the memory alloy wire are fixedly connected to the upper wire clamp and the lower wire clamp, respectively.

3. The lens driving assembly according to claim 2, wherein the memory alloy driving device further includes a support and a bottom plate, a bottom end of the support is connected to an upper surface of the bottom plate to define a movement space, and the circuit board, the movable member, and the memory alloy wire are disposed in the movement space.

4. The lens driving assembly according to claim 2, wherein the outer frame is provided with four upper clips arranged along one diagonal direction of the outer frame, and the circuit board is provided with four lower clips arranged along the other diagonal direction of the outer frame, the four upper clips and the four lower clips being connected by four memory alloy wires.

5. The lens driving assembly according to claim 2, wherein the circuit board is provided with four input pins independent from each other and one output pin, the four input pins are respectively connected with the four lower clips, and the one output pin is connected with an output mounting plate provided at a central portion of the circuit board.

6. The lens driving assembly according to claim 5, wherein the four mutually independent output pins are arranged two by two on both sides of the one of the output pins.

7. The lens driving assembly according to claim 3, wherein the memory alloy driving device further includes an insulating plate disposed within the active space and below the circuit board.

8. The lens driving assembly according to claim 5, wherein the memory alloy driving device further includes a lower pad plate disposed in the movable space and disposed between the inner plate of the movable member and the output mounting plate of the circuit board to connect the movable member with the circuit board.

9. The lens driving assembly according to claim 3, wherein the memory alloy driving device further includes an upper pad frame disposed in the movable space and disposed between the movable member and the motor module, wherein the outer frame of the movable member is connected to a bottom end of the upper pad frame, and a top end of the upper pad frame is connected to the motor module.

10. A lens driving assembly according to claim 1, wherein the motor driving device includes a carrier for mounting the lens and a driving mechanism for driving the carrier to move in the direction of the optical axis for optical zooming and in the plane perpendicular to the optical axis for optical anti-shake.