CN219247682U

CN219247682U - Voice coil motor and camera device

Info

Publication number: CN219247682U
Application number: CN202223398549.XU
Authority: CN
Inventors: 上官光贤; 吴承諹; 高一峰; 郭延春
Original assignee: Baotou Jiangxin Micro Motor Technology Co ltd
Current assignee: Baotou Jiangxin Micro Motor Technology Co ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-06-23
Anticipated expiration: 2032-12-15

Abstract

The utility model discloses a voice coil motor and an image pickup device, which comprise a Z-axis annular coil for controlling focusing of a lens and four XY-axis runway coils for anti-shake, and are characterized in that: the Z-axis annular coil and the XY-axis runway coils are formed on the annular FPC board, the Z-axis annular coil is arranged around each side surface of the FPC board, and the four XY-axis runway coils are respectively arranged on the front side, the back side, the left side and the right side of the FPC board; the coil is directly formed on the FPC board, so that various wiring is omitted, the production process is simplified, the production efficiency of the product is improved, the coil is more stable, and the reliability of the product is ensured.

Description

Voice coil motor and camera device

Technical Field

The utility model relates to the technical field of voice coil motors, in particular to a voice coil motor and an imaging device.

Background

The voice coil motor has the characteristics of high frequency response and high precision. The main principle is that in a permanent magnetic field, the stretching position of a spring piece is controlled by changing the direct current direction of a coil in a motor, so that a lens module is driven to move up and down to realize focusing. The mobile phone camera can realize an automatic focusing function by using the VCM widely, and the position of the lens can be adjusted by the VCM to present clear images. In order to further realize OIS anti-shake of the lens, the voice coil motor is provided with a plurality of groups of coils, and each group of coils needs to be powered, so that lead wiring is troublesome. The existing coil is generally attached to the bracket after being produced independently, the production process is complex and complicated, the production efficiency is low, and the coil which is attached and fixed independently can be loose and the like in the motor movement process, so that the reliability of the product is low.

Disclosure of Invention

The utility model aims to provide a voice coil motor and an imaging device, which can solve the defects of the prior art and have the advantages of good reliability and high production efficiency.

In order to achieve the above object, the solution of the present utility model is:

the utility model provides a voice coil motor, includes the Z axle ring coil that control lens focused and is used for four XY axle runway coils of anti-shake, Z axle ring coil and XY axle runway coil shaping are on annular FPC board, and Z axle ring coil encircles each side of FPC board and sets up, and four XY axle runway coils are located four sides around the FPC board respectively.

Further, the FPC board is a separate FPC board.

Further, the FPC board comprises an annular FPC sub board formed with the Z-axis annular coil and a planar FPC sub board formed with four XY-axis runway coils; bending the planar FPC sub-board to form a ring shape, and then combining the ring-shaped FPC sub-board with the ring-shaped FPC sub-board to form the FPC board.

Further, the device also comprises a shell, an upper spring plate, a magnet, a bracket, a lower spring plate and a base; the shell is fixed on the base, and a containing space is formed between the shell and the base; the upper elastic sheet is used for connecting the shell and the top surface of the bracket, the lower elastic sheet is used for connecting the base and the bottom surface of the bracket, and the bracket is suspended in the accommodating space; the magnets are respectively arranged on the front, the rear, the left and the right surfaces of the bracket; the FPC board is fixed in the inside wall of shell, and four XY axle runway coils correspond four magnetite respectively.

Furthermore, a connecting part is formed by downwards extending one side surface of the FPC board, and the connecting part penetrates through the base to be inserted into the circuit board for electric connection, so as to supply power to the Z-axis annular coil and the XY-axis runway coil.

Further, the device also comprises a Hall sensor; the Hall sensors are provided with at least two, are respectively arranged on FPC boards in the X-axis direction and the Y-axis direction, are electrically connected with the circuit board, and are respectively positioned on the magnets.

Further, the device also comprises a shell, an upper spring plate, a magnet, a bracket, a lower spring plate and a base; the shell is fixed on the base, and a containing space is formed between the shell and the base; the upper elastic sheet is used for connecting the shell and the top surface of the bracket, the lower elastic sheet is used for connecting the base and the bottom surface of the bracket, and the bracket is suspended in the accommodating space; the FPC board is fixed on the outer side wall of the bracket, and the four XY axis runway coils correspond to the front face, the rear face, the left face and the right face of the bracket respectively; the magnets are arranged on the inner side wall of the shell respectively, and correspond to the four XY axis runway coils respectively.

Further, the device also comprises a Hall sensor; the Hall sensors are provided with at least two, are respectively arranged on the FPC board in the X-axis direction and the Y-axis direction, are electrically connected with the FPC board, and are respectively positioned on the magnets.

The utility model also provides an imaging device, and the voice coil motor is applied.

After the technical scheme is adopted, the coil is directly formed on the FPC board, so that various wiring is omitted, the production process is simplified, the production efficiency of the product is improved, the coil has higher stability, and the reliability of the product is ensured.

Drawings

FIG. 1 is a perspective view of an embodiment of the present utility model;

FIG. 2 is an exploded view of an embodiment of the present utility model;

FIG. 3 is a plan cross-sectional view of an embodiment of the present utility model;

FIG. 4 is a perspective cross-sectional view of an embodiment of the present utility model;

fig. 5 is a perspective view of an FPC board according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of an image pickup apparatus to which an embodiment of the present utility model is applied.

Symbol description:

voice coil Motor 10 Mobile phone 20

The shell 1 is provided with an elastic sheet 2, an FPC board 3 and a magnet 4

Base 8 of lower spring 7 of bracket 6 of Hall sensor 5

Housing space 9Z shaft coil 31 XY shaft runway coil 32

A connection portion 33.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in place when the product of the application is used, or the orientation or positional relationship conventionally understood by those skilled in the art, is merely for convenience of describing the present application and simplifying the description, and is not indicative or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the embodiments of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed.

In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

As shown in fig. 1 to 5, a voice coil motor 10 of the present utility model includes a housing 1, an upper spring 2, an FPC board 3, a magnet 4, a hall sensor 5, a bracket 6, a lower spring 7, and a base 8.

The housing 1 is fixed on the base 8, and a containing space 9 is formed between the housing and the base.

The upper elastic sheet 2 is used for connecting the shell 1 and the top surface of the bracket 6, and the lower elastic sheet 7 is used for connecting the base 8 and the bottom surface of the bracket 6 so as to suspend the bracket 6 in the accommodating space 9.

The magnets 4 are respectively arranged on the front, back, left and right surfaces of the bracket 6.

The FPC board 3 is ring-shaped and fixed to the inner side wall of the housing 1, and five coils are formed thereon, including a Z-axis annular coil 31 located at the upper portion of the FPC board 3 around each side of the FPC, and four XY-axis racetrack coils 32 located on the front, rear, left, right, and four sides of the FPC board 3, respectively.

Each coil is integrally formed on the separate FPC board 3, and the specific structural configuration may be as follows:

1. the five coils are formed after the annular FPC board 3 is subjected to three-dimensional etching.

2. After four XY axis runway coils 32 and a plurality of layers of annular coil segments are etched and formed on a planar FPC board 3 at intervals, the FPC board 3 is bent to form an annular shape, and then the coil segments of the annular coils are welded to form a Z axis annular coil 31.

Each coil can also be a structure formed by two FPC sub-boards separately and then combined, and the specific structure can be formed by the following method:

and forming the Z-axis annular coil 31 on the annular FPC sub-board by three-dimensional etching, forming the remaining four XY-axis runway coils 32 on a planar FPC sub-board, bending the planar FPC sub-board to form an annular shape, and then combining the annular FPC sub-board with the annular FPC sub-board to form the FPC board 3.

After the power is on, the Z-axis annular coil 31 is matched with each magnet 4, so that the displacement of the bracket 6 in the Z-axis direction can be realized according to the left-hand rule, and the focusing operation of the lens is completed; the displacement of the bracket 6 on the X, Y axis can be realized by matching the four XY axis runway coils 32 with each magnet 4 according to the right hand rule, so that the OIS horizontal anti-shake function is achieved; the focusing principle and the anti-shake principle belong to the prior art, and are not described here again.

A connection part 33 is formed by extending downwards on one side of the FPC board 3, and the connection part 33 can directly penetrate through the base 8 to be plugged into a circuit board (not shown in the figure) for electric connection, so as to supply power to each coil respectively, and reduce the problem of difficult wiring.

The hall sensor 5 is provided with at least two hall sensors respectively arranged on the FPC boards 3 in the X-axis and Y-axis directions, and is electrically connected with the circuit board through the connection portion 33 of the FPC board 3, and is positioned on the magnet 4 to detect the displacement position of the bracket 6 and provide feedback to constitute the closed-loop voice coil motor 10.

Of course, the FPC board 3 and the magnet 4 may be also arranged in a replaceable manner, the FPC board 3 and the coil are fixed on the outer surface of the bracket 6, and the magnet 4 is fixed on the inner side surface of the housing 1, so that the effect of driving the bracket 6 to displace can be achieved.

As shown in fig. 6, the present utility model further provides an image pickup apparatus, which may be a mobile phone 20, using the closed-loop voice coil motor 10 with OIS function.

In summary, according to the closed-loop voice coil motor 10 of the present utility model, the coil is directly formed on the FPC board 3, so that various wiring is omitted, the production process is simplified, the production efficiency of the product is improved, the coil is more stable, and the reliability of the product is ensured.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that equivalent changes and modifications can be made by those skilled in the art without departing from the principles of the present utility model, which still falls within the scope of the present utility model.

Claims

1. A voice coil motor, includes the Z axle annular coil that control the camera lens is focused and is used for four XY axle runway coils of anti-shake, its characterized in that: the Z-axis annular coil and the XY-axis runway coils are formed on the annular FPC board, the Z-axis annular coil is arranged around each side face of the FPC board, and the four XY-axis runway coils are respectively arranged on the front side face, the rear side face, the left side face and the right side face of the FPC board.

2. A voice coil motor as claimed in claim 1, wherein: the FPC board is an independent FPC board.

3. A voice coil motor as claimed in claim 1, wherein: the FPC board comprises an annular FPC sub-board for forming the Z-axis annular coil and a planar FPC sub-board for forming four XY-axis runway coils; bending the planar FPC sub-board to form a ring shape, and then combining the ring-shaped FPC sub-board with the ring-shaped FPC sub-board to form the FPC board.

4. A voice coil motor as claimed in claim 1, wherein: the device also comprises a shell, an upper elastic piece, a magnet, a bracket, a lower elastic piece and a base; the shell is fixed on the base, and a containing space is formed between the shell and the base; the upper elastic sheet is used for connecting the shell and the top surface of the bracket, the lower elastic sheet is used for connecting the base and the bottom surface of the bracket, and the bracket is suspended in the accommodating space; the magnets are respectively arranged on the front, the rear, the left and the right surfaces of the bracket; the FPC board is fixed in the inside wall of shell, and four XY axle runway coils correspond four magnetite respectively.

5. A voice coil motor as claimed in claim 4, wherein: one side of the FPC board extends downwards to form a connecting part, and the connecting part penetrates through the base to be inserted into the circuit board for electric connection so as to supply power to the Z-axis annular coil and the XY-axis runway coil.

6. A voice coil motor as claimed in claim 5, wherein: the device also comprises a Hall sensor; the Hall sensors are provided with at least two, are respectively arranged on FPC boards in the X-axis direction and the Y-axis direction, are electrically connected with the circuit board, and are respectively positioned on the magnets.

7. A voice coil motor as claimed in claim 1, wherein: the device also comprises a shell, an upper elastic piece, a magnet, a bracket, a lower elastic piece and a base; the shell is fixed on the base, and a containing space is formed between the shell and the base; the upper elastic sheet is used for connecting the shell and the top surface of the bracket, the lower elastic sheet is used for connecting the base and the bottom surface of the bracket, and the bracket is suspended in the accommodating space; the FPC board is fixed on the outer side wall of the bracket, and the four XY axis runway coils correspond to the front face, the rear face, the left face and the right face of the bracket respectively; the magnets are arranged on the inner side wall of the shell respectively, and correspond to the four XY axis runway coils respectively.

8. A voice coil motor as claimed in claim 7, wherein: the device also comprises a Hall sensor; the Hall sensors are provided with at least two, are respectively arranged on the FPC board in the X-axis direction and the Y-axis direction, are electrically connected with the FPC board, and are respectively positioned on the magnets.

9. An image pickup apparatus, characterized in that: use of a voice coil motor according to any one of claims 1 to 8.