CN217655406U

CN217655406U - Anti-shake voice coil motor, camera and electronic product

Info

Publication number: CN217655406U
Application number: CN202221567506.7U
Authority: CN
Inventors: 潘涛; 叶建华; 张需要; 卓英吉; 欧阳建华
Original assignee: Heyuan Youhua Microelectromechanical Technology Co ltd
Current assignee: Heyuan Youhua Microelectromechanical Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-10-25
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses an anti-shake voice coil motor, camera and electronic product, including shell, base, shell and base form the cavity, are equipped with the camera lens carrier in the cavity, hang the camera lens carrier at last reed within the shell and lower reed, cover establish the power coil of focusing of camera lens carrier periphery, around focusing the magnet group that the power coil set up, a serial communication port, go up the reed and lower reed through the suspension wire with the upper surface of base is connected, the upper surface of base is equipped with OIS power coil, OIS power coil is on a parallel with focus power coil, OIS power coil establishes the below of magnet group. The utility model discloses utilize OIS power coil to carry out the electric current cutting in the magnetic field lower part to produce along magnet group length direction's ampere force, and magnet group itself includes mutually perpendicular's magnet board on the horizontal direction, drives the camera lens carrier with this and carries out the shake on two horizontal directions and correct.

Description

Anti-shake voice coil motor, camera and electronic product

Technical Field

The utility model relates to a voice coil motor's technical field, more specifically say, relate to an anti-shake voice coil motor, camera and electronic product.

Background

The Voice Coil Motor is also called as a VCM Motor (Voice Coil Motor), key components of the Voice Coil Motor are a housing, an upper spring, a lens carrier, a Coil wound around the lens carrier, a lower spring and a base, the housing and the base are immobile components, and a magnet is mounted around the housing and fixed. The coil is wound on the outer ring of the carrier and is integrated with the carrier. The carrier is suspended in the magnetic field space in the inner cavity of the shell by the upper and lower reeds, and when the coil is electrified, the carrier can move up and down under the action of ampere force to drive the lens to realize focusing action.

In the mobile phone industry, the camera function is the main development direction, the function requirement of the camera module is higher and higher, and the focusing motor with the Optical Image Stabilizer (OIS) is the current mainstream and the main development direction of the technology. Currently, the mainstream OIS structure is mainly classified into SMA (memory metal) and electromagnetic system according to power source, wherein SMA has the problems of high cost, complex process and monopoly of patents. The electromagnetic system is a thrust source which can be developed by most focusing manufacturers at present, but the structural architecture of the electromagnetic system is a stacked structure that OIS power coils are integrated and designed on an independent PCB of a multilayer combined board, and the PCB is fixed on a base of a motor. The PCB is integrated by adopting a plurality of layers of thin plates, annular copper circuits are designed in the same projection direction of each layer, and the copper circuits are connected in series between different layers to form a coil structure, so that the process is very complicated, and only a few foreign manufacturers can make the parts at present.

In view of this, it is necessary to provide a novel anti-shake structure, which simplifies the design of the multi-layer PCB board and makes the structure of the product simpler and the cost lower on the premise of realizing the same anti-shake function.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first-hand object is to the problem that prior art exists, provides an anti-shake voice coil motor, sets up OIS power coil through the assigned position at magnet group, and it is leading-in to be equipped with corresponding electric energy again, utilizes the produced ampere force of electric current cutting in magnetic field, realizes that the camera lens carrier is corrected in the shake of X axle or Y axle direction.

The utility model discloses the technological effect that will reach realizes through following technical scheme:

the utility model provides an anti-shake voice coil motor, includes shell, base, shell and base form the cavity, are equipped with the camera lens carrier in the cavity, hang the camera lens carrier in the shell go up reed and lower reed, cover the power coil that focuses that establishes at camera lens carrier periphery, around the magnet group that the power coil set up of focusing, go up the reed and lower reed through hanging the silk with the upper surface of base is connected, the upper surface of base is equipped with OIS power coil, OIS power coil is on a parallel with the power coil of focusing, OIS power coil establishes the below of magnet group.

The utility model arranges the focusing power coil around the magnet group, and utilizes the ampere force received by the focusing power coil when the coil is electrified to lead the lens carrier to move up and down along the direction of the optical axis, thereby driving the lens to realize focusing action; on this basis, the utility model discloses still set up OIS power coil in the below of magnet group, utilize OIS power coil to carry out the electric current cutting in the magnetic field lower part to produce along magnet group length direction's ampere force, and magnet group itself includes the magnet board of mutually perpendicular on the horizontal direction, and the shake that drives the camera lens carrier and carry out two horizontal directions is corrected with this.

Preferably, the magnet group includes four magnet plates arranged around an optical axis direction of the lens carrier, all the magnet plates are located at the same height, two opposing magnet plates have opposite polarities and are parallel to each other, and two adjacent magnet plates are perpendicular to each other. When the optical axis direction of the lens carrier is the Z-axis direction, two magnet plates are arranged along the X-axis direction and the other two magnet plates are arranged along the Y-axis direction in the same magnet group.

Preferably, the OIS power coil includes four OIS power coils, one OIS power coil is correspondingly disposed below each magnet plate, the OIS power coil is in an elongated annular structure, the OIS power coil is composed of two parallel straight sides and a connecting line between ends of the two straight sides, and the straight sides are parallel to the side surfaces of the magnet plates. That is to say, the conduction current of the sub-OIS power coil is along the X-axis or Y-axis direction, and the sub-OIS power coil is located below the magnet plate, and it can be known from the left-hand rule that the ampere force applied to the sub-OIS power coil acts on the Y-axis or X-axis direction, and the sub-OIS power coil transmits the movement action to the base, so as to drive the lens carrier to move along the Y-axis or X-axis direction, so as to counteract the shake of the lens carrier in the corresponding direction.

Preferably, the lens carrier comprises a middle frame, the lens carrier is suspended inside the middle frame by the upper spring and the lower spring, and the magnet group is clamped inside the middle frame; one end of the suspension wire is connected with the top surface of the middle frame, the other end of the suspension wire is connected with the upper surface of the base, and the middle frame is suspended above the base by the suspension wire. The base further transmits the ampere force transmitted by the sub-OIS power coil to the middle frame through the suspension wires, and the lens carrier in the middle frame moves along with the ampere force, so that the lens is shaken and corrected.

Preferably, the suspension wires are symmetrically arranged at four corner positions of the middle frame. Such a positional arrangement helps ensure stability in the shake correction.

Preferably, the suspension wire is made of a metal spring plate suspension wire.

Preferably, four groups of winding posts are arranged on the upper surface of the base, and each group of winding posts is correspondingly sleeved with one sub-OIS power coil. And the winding posts are connected with an external power supply and guide electric energy to the corresponding sub OIS power coils.

Preferably, the edge of the base is provided with a plurality of outward protruding terminal pins, and the terminal pins are used for connecting an external power supply. After entering from the terminal pin, the electric energy reaches the winding post through the base.

A second object of the present invention is to provide a camera, wherein the camera adopts the above-mentioned anti-shake voice coil motor, and is worn to locate the lens of the lens carrier. This is because voice coil motor mainly used realizes the auto focus of camera lens to become the key part of digital product cameras such as cell-phone, camera at present, consequently any has been used the utility model provides a voice coil motor reaches the camera of anti-shake correction effect, also belongs to the utility model discloses technical scheme's protection scope.

A third object of the present invention is to provide an electronic product, wherein the electronic product includes the camera, the electronic product can be a digital camera product such as a smart phone, a notebook computer, and a security system, which needs to realize the optical anti-shake function.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses utilize a plurality of roots to hang the center in the top of base, the sub-OIS power coil who fixes on the base receives the ampere force of X axle or Y axle direction (use the optical axis direction to be the condition of X axle) when the effect of magnetic field and electric current down, and the ampere force conducts to the center through the base and makes it remove at X axle or Y axle direction to drive the anti-shake correction motion of camera lens carrier realization X axle or Y axle direction.

Generally, the anti-shake voice coil motor that this technical scheme provided possesses advantages such as simple structure, easily preparation, low-cost, is favorable to promoting the market competitiveness of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an exploded schematic view of an anti-shake voice coil motor according to the present embodiment;

fig. 2 is a partial sectional view of the anti-shake voice coil motor according to the present embodiment;

FIG. 3 is a schematic structural view of the magnetic shield of the present embodiment;

in the figure, 1-housing; 2-a base; 3-a lens carrier; 4-upper reed; 5-lower reed; 6-focusing power coil; 7-a magnet group; 7 a-a magnet plate; 8-suspension wire; 9-OIS power coil; 9 a-sub OIS power coil; 10-a winding post; 11-terminal pin; 12-middle frame.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, the embodiment provides an anti-shake voice coil motor, including a housing 1 and a base 2, where the housing 1 and the base 2 are engaged to form a cavity, a lens carrier 3, an upper spring 4 and a lower spring 5 for suspending the lens carrier 3 within the housing 1, a focusing power coil 6 sleeved on the periphery of the lens carrier 3, and a magnet set 7 disposed around the focusing power coil 6 are disposed in the cavity, the upper spring 4 and the lower spring 5 are connected with the upper surface of the base 2 through a suspension wire 8, the upper surface of the base 2 is provided with an OIS power coil 9, the OIS power coil 9 is parallel to the focusing power coil 6, and the OIS power coil 9 is disposed below the magnet set 7.

Referring to fig. 2, in the present technical solution, an axial direction, that is, an optical axis direction, of the lens carrier 3 is set as a Z axis, the base 2 is disposed on a plane formed by an X axis and a Y axis, the base 2 is located below the magnet group 7, the magnet group 7 includes four magnet plates 7a arranged around the optical axis direction of the lens carrier 3, all the magnet plates 7a are located at the same height, two opposite magnet plates 7a have opposite polarities and are parallel to each other, and two adjacent magnet plates 7a are perpendicular to each other. That is, two of the magnet plates 7a are arranged along the X-axis direction, and the remaining two magnet plates 7a are arranged along the Y-axis direction.

Referring to fig. 3, the OIS power coil 9 includes four OIS power coils 9a, one OIS power coil 9 is correspondingly disposed below each magnet plate 7a, the OIS power coil 9 is in a slender annular structure and is formed by two parallel straight sides and a connecting line between two straight-side ends, four groups of winding posts 10 are disposed on the upper surface of the base 2, and the OIS power coils 9a are directly wound on the corresponding winding posts 10 for fixation. Two of the sub OIS power coils 9a are arranged in the X-axis direction, and the other two sub OIS power coils 9a are arranged in the Y-axis direction, and each of the sub OIS power coils 9a is parallel to the corresponding magnet plate and is located close to or directly below the magnet plate 7 a.

According to the swing arrangement of the sub-OIS power coil 9a, the conducting current of the sub-OIS power coil 9a will travel along the X-axis or Y-axis direction, and the sub-OIS power coil 9a is located below the magnet plate 7a, wherein the polarity of the magnet plate 7a is fixed, the opposite magnet plate 7a has opposite polarity to form a magnetic field, according to the arrangement of the four magnet plates 7a, the magnet group 7 forms two mutually perpendicular magnetic fields, according to the left-hand rule, the ampere force received by the sub-OIS power coil 9a acts on the Y-axis or X-axis direction, and the sub-OIS power coil 9a is itself fixed on the base 2, so that the moving action is transmitted to the base 2, and the lens carrier 3 is further driven to move along the Y-axis or X-axis direction. In the middle, the specific displacement motion of the sub OIS power coil 9a in the X-axis and Y-axis directions can be controlled by only adjusting the direction and magnitude of the induced current, so as to counteract the shake of the lens carrier 3 in the corresponding direction.

It is supplementary to explain, the border of base 2 is equipped with a plurality of protruding terminal pin 11 outward, terminal pin 11 is used for connecting external power source. After entering from the terminal pin 11, the electric energy reaches the winding post 10 through the base 2.

Referring to fig. 2, specifically, the anti-shake vcm includes a middle frame 12, wherein the lens carrier 3 is suspended inside the middle frame 12 by the upper spring 4 and the lower spring 5, the magnet assembly 7 is clamped inside the middle frame 12, an inner sidewall of the middle frame 12 abuts against an outer sidewall of the magnet plate 7a, and an inner top wall of the middle frame 12 abuts against an outer top wall of the magnet plate 7 a. One end of the suspension wire 8 is connected with the top surface of the middle frame 12, the other end of the suspension wire is connected with the upper surface of the base 2, and the middle frame 12, the upper reed 4, the lower reed 5, the lens carrier 3, the magnet group 7 and other lens components are all hung above the base 2 by means of the suspension wire 8. The suspension wires 8 are symmetrically arranged at four corner positions of the middle frame 12, the suspension wires 8 are made of metal elastic sheet suspension wires and have certain winding characteristics, after the sub-OIS power coil 9a conducts electric energy, the base 2 further transmits the ampere force transmitted by the sub-OIS power coil 9a to the middle frame 12 through the suspension wires 8, and the lens carrier 3 in the middle frame 12 moves along with the ampere force, so that the lens is shaken and corrected.

According to the technical scheme, four equal-length suspension wires 8 on the same plane are utilized to move the middle frame' 1 and the lens group assembly in the middle frame under the control of an electromagnetic field, and the suspension wires 8 do not contact any place except the base 2, so that the suspension wires are suspended in the magnetic field like silk threads, and the lens carrier 3 can slightly translate along the X-axis direction and the Y-axis direction on the plane parallel to the OIS power coil 9 to compensate the inclination shake of the voice coil motor during shooting.

Furthermore, this embodiment still provides a camera, the camera has adopted foretell anti-shake voice coil motor, has worn to locate the camera lens of camera lens carrier 3. This is because voice coil motor mainly used realizes the auto focus of camera lens to become the key part of digital product cameras such as cell-phone, camera at present, consequently any has been used the utility model provides a voice coil motor reaches the camera of anti-shake correction effect, also belongs to the utility model discloses technical scheme's protection scope.

Finally, the embodiment further provides an electronic product, wherein the electronic product comprises the camera, and the electronic product can be a digital camera product such as a smart phone, a notebook computer and a security system, which needs to realize an optical anti-shake function.

To sum up, the focusing power coil 6 is disposed around the magnet assembly 7, and the ampere force applied to the focusing power coil 6 when the focusing power coil is energized causes the lens carrier 3 to move up and down along the optical axis direction (also understood as the Z-axis direction), so as to drive the lens to realize focusing; on this basis, the utility model discloses still set up OIS power coil 9 in magnet group 7's below, utilize OIS power coil 9 to carry out the electric current cutting in the magnetic field lower part to produce along magnet group 7 length direction's ampere force, and magnet group 7 itself includes magnet plate 7a at X axle, the mutual perpendicular in Y axle direction, drives lens carrier 3 with this and carries out the shake correction in two directions, thereby accomplishes optics anti-shake and move.

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 described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. An anti-shake voice coil motor comprises a shell and a base, wherein the shell and the base form a cavity, a lens carrier, an upper reed and a lower reed which suspend the lens carrier in the shell, a focusing power coil which is sleeved on the periphery of the lens carrier and a magnet group which is arranged around the focusing power coil are arranged in the cavity, and the anti-shake voice coil motor is characterized in that the upper reed and the lower reed are connected with the upper surface of the base through suspension wires, an OIS power coil is arranged on the upper surface of the base, the OIS power coil is parallel to the focusing power coil, and the OIS power coil is arranged below the magnet group.

2. The anti-shake vcm according to claim 1, wherein the magnet assembly comprises four magnet plates disposed around the optical axis of the lens carrier, all of the magnet plates are located at the same height, each two opposite magnet plates have opposite polarities and are parallel to each other, and each two adjacent magnet plates are perpendicular to each other.

3. The anti-shake vcm according to claim 2, wherein the OIS power coil comprises four OIS power coils, one of the OIS power coils is disposed below each of the magnet plates, the OIS power coils are in an elongated ring configuration, and each OIS power coil comprises two parallel straight sides and a connecting line between ends of the two straight sides, and the straight sides are parallel to the lateral surfaces of the magnet plates.

4. The anti-shake voice coil motor according to claim 1, comprising a middle frame, wherein the lens carrier is suspended inside the middle frame by the upper spring and the lower spring, and the magnet assembly is clamped inside the middle frame; one end of the suspension wire is connected with the top surface of the middle frame, the other end of the suspension wire is connected with the upper surface of the base, and the middle frame is hung above the base by means of the suspension wire.

5. The anti-shake vcm according to claim 4, wherein the suspension wires are symmetrically disposed at four corner positions of the middle frame.

6. The anti-shake voice coil motor according to claim 1, wherein the suspension wires are spring suspension wires made of metal.

7. The anti-shake voice coil motor according to claim 3, wherein four sets of winding posts are provided on the upper surface of the base, and each set of winding posts is correspondingly sleeved with one of the sub-OIS power coils.

8. The anti-shake vcm according to claim 1, wherein a plurality of outwardly protruding pins are disposed on the edge of the base, and the pins are used for connecting an external power source.

9. A camera, characterized in that, it comprises the anti-shake voice coil motor according to any one of claims 1-8, a lens passing through the lens carrier.

10. An electronic product, characterized by comprising the camera head according to claim 9.