An OIS anti-shake camera module

Abstract

The invention provides an OIS anti-shake camera module, comprising a camera module, wherein the camera module comprises a VCM motor and an FPC, and also comprises an anti-shake component, wherein the anti-shake component comprises a shell provided with an inner cavity, wherein the shell can be fixedly connected to a main board of an electronic device, wherein an anti-shake bracket is fixedly connected in the inner cavity, wherein the anti-shake bracket is used for limiting the movement of the camera module in the vertical direction and allowing the camera module to move horizontally, wherein the outer shell of the VCM motor is made of a magnetic conductive material containing at least one element of iron, cobalt and nickel; wherein a plurality of groups of induction components are evenly distributed on the circumferential inner side wall of the shell, wherein the plurality of groups of induction components are arranged around the camera module, wherein each group of induction components comprises a Hall sensor and at least one electromagnet, wherein the Hall sensor is electrically connected to the electromagnet, wherein the Hall sensor is electrically connected to the FPC, and wherein one end of the FPC extends out of the shell; wherein the invention has a simple structure, a small size, a low cost, and can effectively prevent the camera from shaking.

Description

Technical Field

[0001] The present invention relates to the field of cameras, and in particular to an OIS anti-shake camera module. Background Art

[0002] With the rapid development of the smartphone industry, people's requirements for the imaging effects of mobile phone cameras are gradually increasing. At present, the main factor affecting the imaging effect is jitter; conventional anti-shake camera modules usually achieve anti-shake by moving the lens or moving the image sensor, but this anti-shake method is less effective and prone to problems such as dark corners and image quality loss at the edge of the picture due to serious misalignment between the lens and the image sensor. At the same time, there are also problems such as complex structure, large size, and high cost, which are contrary to the current development direction of thin and light mobile devices.

[0003] The patent document with patent application number CN202011642510.0 discloses an anti-shake structure, an anti-shake system and a camera device. In the patent document, a plurality of ball bearings are arranged between the lens support body and the frame, so when the lens support body moves relative to the frame along the Z direction, the ball bearings can be used to ensure that the lens support body can move more flexibly, and the friction between the lens support body and the frame can also be reduced. Since a guide column is also arranged on the lens support body, during the movement of the lens support body relative to the frame, the ball bearings are in contact with the guide column and the frame at the same time, thereby ensuring the stability of the ball bearing movement, and then ensuring the stability of the movement of the lens support body. The technical solution in the patent document has a complex structure, large size and high cost. Summary of the invention

[0004] The problem solved by the present invention is to provide an OIS anti-shake camera module, which has a simple structure, a small size, a low cost and can effectively prevent the camera from shaking.

[0005] To solve the above problems, the present invention provides an OIS anti-shake camera module, including a camera module, the camera module including a VCM motor and an FPC, and also including an anti-shake component, the anti-shake component including a shell provided with an inner cavity, the shell is used to be fixedly connected to the main board of an external electronic device, an anti-shake bracket is fixedly connected in the inner cavity, the camera module is movably connected to the anti-shake bracket, the anti-shake bracket is used to limit the movement of the camera module in the vertical direction and allow the camera module to move horizontally, the shell of the VCM motor is made of a magnetic conductive material containing at least one element of iron, cobalt and nickel; a plurality of groups of sensing components are evenly distributed on the circumferential inner wall of the shell, the plurality of groups of sensing components are arranged around the camera module, each group of sensing components includes a Hall sensor and at least one electromagnet, the Hall sensor is electrically connected to the electromagnet, the Hall sensor is electrically connected to the FPC, and one end of the FPC extends out of the shell for power supply access of the external electronic device.

[0006] The beneficial effect of the present invention is that, due to the presence of the anti-shake bracket, the camera module can be limited up and down as a whole so that it does not move in the vertical direction. Once the camera module moves in the lateral direction, the Hall sensor senses the displacement of the camera module and sends an electrical signal to control the strength of the magnetic field of the electromagnet in the opposite direction, thereby finally forming a magnetic field force to attract the outer shell of the VCM motor and pull it back to its original position to offset the impact of lateral shaking.

[0007] Furthermore, the anti-shake bracket includes a plurality of vertically arranged limit columns, each of which is connected to a limit block at both ends, which is arranged horizontally and protrudes from the circumferential side wall of the limit column, and all the limit columns are distributed at intervals on the outer peripheral side of the camera module, and the two limit blocks on each limit column are respectively located above and below the camera module, and are slidably matched with the camera module. The beneficial effect is that the camera module is limited by the upper and lower limit blocks, and the limiting effect is better.

[0008] Furthermore, both the upper and lower ends of the camera module are provided with horizontal planes, and the mating surfaces of the two limit blocks on each limit column and the upper and lower ends of the camera module are both set as horizontal planes, so that the two limit blocks on each limit column can slide with the camera module while limiting the movement of the camera module in the vertical direction. The beneficial effect is that the horizontal plane can effectively fit tightly with the camera module, and better limit the movement of the camera module in the vertical direction.

[0009] Furthermore, the housing includes a box body with an inner cavity and an upper cover connected to the box body; each limit block is provided with a first screw hole, and the upper cover and the bottom wall of the box body are provided with second screw holes corresponding to the positions of the limit columns, and the limit block at the upper end of each limit column is fixed to the upper cover by bolts, and the limit block at the lower end of each limit column is fixed to the box body by bolts. The beneficial effect is that the installation of the four limit columns is more secure and the anti-shake effect is better.

[0010] Furthermore, the inner cavity of the box body is a cubic structure, the camera module is a cubic structure as a whole, and there are four limit posts, which are respectively arranged at the four corners of the inner cavity of the box body. The beneficial effect is that since the camera module is a cubic structure as a whole, the limit posts arranged at the four corners of the camera module can be very stable.

[0011] Furthermore, the sensing components are four groups, each group has two electromagnets; the four groups of Hall sensors and electromagnets are respectively arranged on the four inner walls of the shell; each Hall sensor is respectively arranged in the middle of each inner wall, and each group of electromagnets is arranged on the left and right sides of each Hall sensor. The beneficial effect is that the movement of the camera module can be effectively captured from all directions, and the electrical signal is transmitted to the electromagnet, so that the electromagnet generates an effective magnetic field from all directions to attract the camera module.

[0012] Furthermore, an opening is provided on the housing for the FPC to extend out. The beneficial effect is that in order to save the housing space and make the housing limit function better, a special opening is required for the FPC to extend out. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall exploded view of the present invention;

[0014] Figure 2 An exploded view of the anti-shake component of the present invention;

[0015] Figure 3 An exploded view of the camera module of the present invention;

[0016] Figure 4 It is a three-dimensional schematic diagram of the limiting column in the present invention;

[0017] Figure 5 A cross-sectional view of the present invention as a whole;

[0018] Figure 6 A schematic diagram of the housing of the present invention;

[0019] Description of reference numerals:

[0020] 1-lens, 2-VCM motor, 3-image sensor, 4-lens holder, 5-first PCB board, 5.1-second PCB board, 6-connector, 7-FPC, 7.1-adapter FPC, 10-camera module, 100-anti-shake module, 101-upper cover, 101.1-second screw hole, 200-shell, 200a-box body, 201-opening, 300-Hall sensor, 400-electromagnet, 500-anti-shake bracket, 501-limit column, 501.1-limit block, 501.2-first screw hole. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the inventive product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. The vertical direction, lateral direction, and horizontal direction described in the following embodiments are all based on the directions in the accompanying drawings. Figure 1 To Attachment Figure 5The vertical direction refers to the up-down direction, and the horizontal direction refers to the left-right direction.

[0023] It should be noted that the present invention allows the camera module 10 to move horizontally. Since the camera module 10 relies on the VCM motor 2 to push the lens for focusing in the vertical direction, the jitter caused by the movement of the camera module 10 in the vertical direction is the main problem. The jitter caused by the lateral movement of the camera module 10 is solved by the present invention through the magnetic field force generated by the Hall sensor 300 and the electromagnet 400 described below.

[0024] The present invention provides an OIS anti-shake camera module, including a camera module 10, the camera module 10 includes a lens 1, a VCM motor 2, an image sensor 3, a lens holder 4, a first PCB board 5, a connector 6 and an FPC 7 connected in sequence from top to bottom, the FPC 7 is electrically connected to a transfer FPC 7.1, the end of the FPC 7 is electrically connected to a second PCB board 5.1, and also includes an anti-shake component 100, and also includes an anti-shake component 100, the anti-shake component 100 includes a shell 200 provided with an inner cavity, the shell 200 is used to be fixedly connected to a main board of an external electronic device, an anti-shake bracket 500 is fixedly connected in the inner cavity, and the camera module 10 and the anti-shake bracket 500 are connected in sequence. 00 is movably connected, the anti-shake bracket 500 is used to limit the movement of the camera module 10 in the vertical direction, and can allow the camera module 10 to move horizontally. The shell of the VCM motor 2 is made of a magnetic conductive material containing at least one element of iron, cobalt, and nickel; a plurality of groups of sensing components are evenly distributed on the circumferential inner wall of the shell 200, and the plurality of groups of sensing components are arranged around the camera module 10. Each group of sensing components includes a Hall sensor 300 and at least one electromagnet 400. The Hall sensor 300 is electrically connected to the electromagnet 400, and the Hall sensor 300 is electrically connected to the FPC7. One end of the FPC7 extends out of the shell 200 for power supply access to external electronic equipment. The Hall sensor 300 senses the displacement of the camera module 10 and sends an electrical signal to control the magnetic field strength of the electromagnet 400 in the opposite direction, and finally forms a magnetic field force to attract the shell of the VCM motor 2 to offset the influence of lateral shaking.

[0025] Specifically, the present invention is applied to the field of electronic products such as mobile phones and tablet computers, so the motherboard of the corresponding electronic products needs to be powered. For example, when the present invention is applied to a mobile phone, the connector 6 is used to electrically connect to the interface on the mobile phone motherboard. The current of the mobile phone motherboard is input into the second PCB board 5.1 through the connector 6, and then into FPC7. Since the adapter FPC7.1 is electrically connected to FPC7, and the adapter FPC7.1 is connected to the shell 200, and the shell 200 is made of iron, cobalt and nickel materials, the current will flow into the adapter FPC7.1 and spread throughout the shell 200, so that the Hall sensor 300 and the electromagnet 400 arranged on the inner wall of the shell 200 are powered. The current on FPC7 will further flow into the first PCB board 5. The mirror base 4 is electrically connected to the first PCB board 5 by pins. The current enters the mirror base 4 and further flows into the image sensor 3 and the VCM motor 2 to complete the power supply to the image sensor 3 and the VCM motor 2. The same is true when applied to other electronic products, which will not be repeated; each Hall sensor 300 performs logical control on all electromagnets 400 through the adapter FPC7.1; as shown in the attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 5 As shown, the camera module 10 is used to adjust the light of natural light and convert the adjusted light into an electrical signal to transmit to an external device; the Hall sensor 300 is based on the Hall effect. When the camera module 10 moves, the magnetic field of the VCM motor 2 shell will change, so the Hall sensor 300 can sense the moving distance of the camera module 10 and transmit the corresponding electrical signal to the electromagnet 400 in the opposite direction of the moving direction of the camera module 10. The strength of the electrical signal changes according to the lateral moving distance of the camera module 10. The greater the lateral moving distance, the stronger the electrical signal strength, and the stronger the magnetic field of the electromagnet 400. Since the material of the shell of the VCM motor 2 can be attracted by a magnet, the shell of the VCM motor 2 in the camera module 10 will be strongly attracted by the magnetic field in the opposite direction, offsetting the moving distance caused by the jitter, and vice versa. The smaller the lateral movement distance, the weaker the electrical signal strength, and the weaker the magnetic field of the electromagnet 400, so that the outer shell of the VCM motor 2 is weakly attracted by the magnetic field force in the opposite direction, offsetting the movement distance caused by the jitter; the technical personnel in this field can make corresponding adjustments to the specific conversion of current intensity and magnetic field intensity according to the number of Hall sensors 300, the size of the camera module 10, the number of electromagnets 400, and the iron, cobalt and nickel content of the shell 200, in order to offset the movement distance caused by the jitter; the Hall sensor 300 and the electromagnet 400 are evenly distributed and bonded to the inner wall of the shell 200; and when the camera module 10 is placed in the anti-shake bracket 500, it is limited in the vertical direction by the anti-shake bracket 500 and cannot move in the vertical direction, so the vertical jitter does not need to be processed, and when the upper cover 101 is connected to the shell 200, it is further limited.

[0026] In a preferred embodiment of the present invention, as shown in the attached Figure 4 As shown, the anti-shake bracket 500 includes a plurality of vertically arranged limit columns 501, each of which is connected to a limit block 501.1 at both ends, and the limit block 501.1 is arranged horizontally and protrudes from the circumferential side wall of the limit column 501. All the limit columns 501 are distributed at intervals on the outer peripheral side of the camera module 10, and the two limit blocks 501.1 on each limit column 501 are respectively located above and below the camera module 10, and slide with the camera module 10. As shown in the attached figure Figure 4 As shown, attached Figure 4 A pair of limit blocks 501.2 are connected to the upper and lower ends of the limit column 501.

[0027] Preferably, as attached Figure 4 As shown, the two limiting blocks 501.2 of each limiting column 501 are integrally formed with the vertical rod 501.1, which has better firmness and better anti-shake effect.

[0028] Preferably, horizontal planes are provided at the upper and lower ends of the camera module 10, and the mating surfaces of the two limit blocks 501.1 on each limit column 501 and the upper and lower ends of the camera module 10 are set as horizontal planes, so that the two limit blocks 501.1 on each limit column 501 can slide with the camera module 10 while limiting the movement of the camera module 10 in the vertical direction.

[0029] In a preferred embodiment of the present invention, the shell 200 includes a box body 200a provided with an inner cavity and an upper cover 101 connected to the box body 200a; a first screw hole 501.2 is provided on each limit block 501.1, and second screw holes 201.1 corresponding to the positions of each limit column 501 are provided on the upper cover 101 and the bottom wall of the box body 200a, and the limit block 501.1 at the upper end of each limit column 501 is fixed to the upper cover 101 by bolts, and the limit block 501.1 at the lower end of each limit column 501 is fixed in the box body 200a by bolts.

[0030] Preferably, the inner cavity of the box body 200a is a cubic structure, the camera module 10 is a cubic structure as a whole, and there are four limit posts 501, which are respectively arranged at the four corners of the inner cavity of the box body 200a. Since the camera module 10 is a rectangular structure as a whole, the limit posts 501 are arranged at the four corners of the camera module 10 to be more stable.

[0031] Preferably, each limiting column 501 can be welded to the upper cover 101 and the shell 200, which makes the whole more solid and has a better limiting effect, but this method is not suitable for disassembly.

[0032] In a preferred embodiment of the present invention, the sensing components are divided into four groups, and the number of electromagnets 400 in each group is two; the four groups of Hall sensors 300 and electromagnets 400 are respectively arranged on the four inner walls of the shell 200; each Hall sensor 300 is respectively arranged in the middle of each inner wall, and each group of electromagnets 400 is arranged on the left and right sides of each Hall sensor 300.

[0033] Specifically, two electromagnets 400 and a Hall sensor 300 are provided on each inner side wall, so that the Hall sensor 300 can effectively capture the movement of the camera module 10. Two electromagnets 400 are provided on each inner side wall to effectively respond to the movement in each lateral direction. The Hall sensor 300 transmits the electrical signal to the electromagnet 400, so that the electromagnets 400 in each direction generate effective magnetic field forces in the corresponding opposite directions to attract the camera module 10 to offset the lateral jitter.

[0034] In a preferred embodiment of the present invention, an opening 201 for the FPC 7 to extend out is provided on the housing 200. In order to save space in the housing 200 and make the housing 200 have a better limiting effect, a special opening 201 is provided for the FPC 7 to extend out.

[0035] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An OIS anti-shake camera module, comprising a camera module (10), wherein the camera module (10) comprises a VCM motor (2) and an FPC (7), characterized in that: The device also includes an anti-shake component (100), the anti-shake component (100) including a shell (200) provided with an inner cavity, the shell (200) being used for being fixedly connected to a mainboard of an external electronic device, the inner cavity being fixedly connected to an anti-shake bracket (500), the camera module (10) being movably connected to the anti-shake bracket (500), the anti-shake bracket (500) being used for limiting the movement of the camera module (10) in the vertical direction and allowing the camera module (10) to move horizontally, the outer shell of the VCM motor (2) being made of a magnetic conductive material containing at least one element of iron, cobalt and nickel; a plurality of groups of induction groups are evenly distributed on the circumferential inner wall of the shell (200); A plurality of groups of sensing components are arranged around the camera module (10), each group of sensing components comprises a Hall sensor (300) and at least one electromagnet (400), the Hall sensor (300) is electrically connected to the electromagnet (400), the Hall sensor (300) is electrically connected to the FPC (7), one end of the FPC (7) extends outside the housing (200) to provide power supply for external electronic equipment; the anti-shake bracket (500) comprises a plurality of vertically arranged limit columns (501), each of the limit columns (501) is connected to a limit block (501.1) at both upper and lower ends, the limit block (501.1) being arranged horizontally and protruding On the circumferential side wall of the limiting column (501), all the limiting columns (501) are spaced apart and distributed on the outer peripheral side of the camera module (10); the two limiting blocks (501.1) on each limiting column (501) are respectively located above and below the camera module (10) and are slidably matched with the camera module (10); the upper and lower ends of the camera module (10) are both provided with horizontal planes, and the matching surfaces of the two limiting blocks (501.1) on each limiting column (501) and the upper and lower ends of the camera module (10) are both set as horizontal planes, so that the two limiting blocks (501.1) on each limiting column (501) and the camera module (10) are slidably matched with each other. 0) while limiting the movement of the camera module (10) in the vertical direction in a sliding fit; the housing (200) comprises a box body (200a) provided with an inner cavity and an upper cover (101) connected to the box body (200a); a first screw hole (501.2) is provided on each of the limit blocks (501.1); the upper cover (101) and the bottom wall of the box body (200a) are provided with second screw holes (201.1) corresponding to the positions of the limit columns (501); the limit blocks (501.1) at the upper end of each limit column (501) are fixed to the upper cover (101) by bolts; and the limit blocks (501.2) at the lower end of each limit column (501) are fixed to the upper cover (101) by bolts.1) fixed in the box body (200a) by bolts; the inner cavity of the box body (200a) is a cubic structure, the camera module (10) is an entire cubic structure, the number of the limiting pillars (501) is four, and they are respectively arranged at the four corners of the inner cavity of the box body (200a); the number of the sensing components is four groups, and the number of the electromagnets (400) in each group is two; the four groups of Hall sensors (300) and the electromagnets (400) are respectively arranged on the four inner side walls of the housing (200); each of the Hall sensors (300) is respectively arranged in the middle of each inner side wall, and each group of the electromagnets (400) is arranged on the left and right sides of each Hall sensor (300). .

2. The OIS anti-shake camera module according to claim 1, characterized in that: The housing (200) is provided with an opening (201) through which the FPC (7) is extended.

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