CN219999489U - Camera module - Google Patents

Abstract

The utility model discloses a camera module, which comprises a circuit board, a photoelectric sensor, an infrared cut-off filter, a motor component and a lens, wherein the circuit board, the photoelectric sensor, the infrared cut-off filter, the motor component and the lens are sequentially arranged along the direction of an optical axis, a mounting groove is formed in the circuit board at a position corresponding to the photoelectric sensor, a first annular groove is formed in the circuit board around the mounting groove, the bottom surface of the first annular groove is higher than the bottom surface of the mounting groove, the photoelectric sensor is arranged in the mounting groove, the top surface of the photoelectric sensor is matched with the bottom surface of the first annular groove, the periphery of the photoelectric sensor is bonded with the bottom surface of the first annular groove through a gold wire, and the top end of the gold wire is matched with the top surface of the circuit board. Compared with the prior art, the camera module provided by the utility model can effectively reduce the height.

Description

Camera module

Technical Field

The utility model relates to the technical field of camera shooting, in particular to a camera module.

Background

In order to meet the demands of people for thinning electronic devices such as handheld communication devices, tablet type electronic devices, camera/camcorders, etc., manufacturers of these electronic devices have adopted various technical means so as to make the electronic devices thinner and thinner. Among these, thinning of the camera module is inevitably involved so as not to protrude too much when mounted to the electronic apparatus.

Fig. 1 is a schematic structural diagram of a camera module in the prior art. The camera module among the prior art includes circuit board A1, photoelectric sensor A2, infrared cut-off filter support A3, infrared cut-off filter A4, motor assembly A5 and camera A6 that set gradually by image space to object space, infrared cut-off filter support A3 towards one side of object space with motor assembly A5 is connected towards one side of image space, infrared cut-off filter support A3 towards one side of image space with circuit board A1 is connected, infrared cut-off filter A4 is arranged in the position department of just facing the camera lens on the infrared cut-off filter support A3. The camera module, the infrared cut-off filter support A3 occupies the height space of the camera module, so that the overall height of the camera module is higher, and thin electronic equipment cannot be matched better.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to solve the technical problems that: provided is a camera module capable of reducing the height.

In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a camera module, including circuit board, photoelectric sensor, infrared cut-off light filter, motor assembly and the camera lens that set gradually along the optical axis direction, correspond on the circuit board the position department of photoelectric sensor is provided with a mounting groove, wind on the circuit board the mounting groove a week is provided with a first annular, the bottom surface height of first annular is higher than the bottom surface height of mounting groove, photoelectric sensor set up in the mounting groove and the top surface height with the bottom surface height looks adaptation of first annular, photoelectric sensor's periphery pass through the gold thread with the bottom surface bonding of first annular, the top height of gold thread with the top surface height looks adaptation of circuit board.

Further, the circuit board is a soft-hard combined circuit board.

Further, a through groove penetrating in the optical axis direction is formed in the position, corresponding to the photoelectric sensor, of the flexible circuit board, the through groove is surrounded with a right-opposite area of the hard circuit board to form the mounting groove, and the right-opposite area of the hard circuit board to form the groove bottom surface of the mounting groove; the first annular groove is arranged on the flexible circuit board and distributed around the mounting groove in a circle.

Further, the motor assembly comprises a shell, wherein an assembly hole penetrating along the optical axis direction is formed in the shell, and the lens is installed in the assembly hole and fixedly connected with the hole wall; the one end towards the image side on the casing be provided with one with the first keep away empty groove that the coaxial intercommunication of mounting hole set up, the area of first keep away empty groove on the horizontal projection face perpendicular with the optical axis direction is greater than the area of mounting hole, just the size of first keep away empty groove is greater than the size of infrared cut-off light filter, supplies infrared cut-off light filter holds wherein.

Further, a plurality of inner concave ring grooves distributed along the optical axis direction are arranged on the outer peripheral surface of the lens, an outwards-protruding ring convex part is formed between every two adjacent inner concave ring grooves, and glue is filled between the inner concave ring grooves and the ring convex parts of the lens and the hole wall of the assembly hole.

Further, the dimension of the first clearance groove on the horizontal projection plane perpendicular to the optical axis direction is larger than the dimension of the corresponding surface of the first annular groove; the infrared cut-off filter is arranged in the first space-avoiding groove, and the infrared cut-off filter is arranged on the circuit board; the support comprises a flat supporting part and a vertical supporting part formed by extending the periphery of the flat supporting part towards the image space along the optical axis direction, the size of one side surface of the flat supporting part towards the circuit board along the optical axis direction is larger than that of the first annular groove, and one surface of the vertical supporting part, which is opposite to the circuit board, is adhered to the circuit board positioned outside the first annular groove.

Further, a light transmission area penetrating in the optical axis direction is formed at the position of the flat support part corresponding to the photoelectric sensor, a second annular groove is formed on the support around the light transmission area, the bottom surface of the second annular groove is higher than the bottom surface of the flat support part, and the bottom surface of the infrared cut-off filter is connected with the bottom surface of the second annular groove.

Further, the pins of the motor protrude from the edge of one side face of the motor, which faces the image side, and the protruding length of the pins is matched with the thickness of the circuit board along the optical axis direction; and the circuit board is provided with a clearance area corresponding to the edge of the pin, and the pin is arranged in the clearance area and welded with the circuit board.

Furthermore, the clearance area is a notch penetrating along the optical axis direction and penetrating outwards along the horizontal direction of the circuit board, and the pin is arranged in the notch and welded with the inner wall of the notch.

Further, a spot welding groove used for being welded with the pin is formed in the position, corresponding to the pin, of the inner wall of the notch, the spot welding groove is a semicircular groove with a semicircular cross section, and the semicircular groove penetrates through the circuit board along the optical axis direction.

According to the camera module, the height of the camera module can be reduced by the technical means of eliminating the bracket or accommodating the bracket in the first empty avoidance groove. In the scheme of accommodating the bracket in the first clearance groove, the size of the bracket is designed to be smaller than the cross-sectional size of the shell of the Yu Mada component, so that the bracket is completely accommodated in the shell, and the shoulder height of the module is not affected by the bracket. The size of the bracket on the horizontal projection plane perpendicular to the optical axis only needs to be enough to cover the photoelectric sensor and the gold thread, and each electronic component on the circuit board is placed outside the bracket and is accommodated in the first clearance groove together with the bracket. And a clearance space is arranged at the position of the circuit board corresponding to the shell of the motor assembly, so that the shell of the motor assembly does not occupy the height of the camera module. The height of the camera module can be reduced by more than about 1mm through the design.

Drawings

Fig. 1 is a schematic structural diagram of a camera module in the prior art.

Fig. 2 is a schematic structural diagram of an embodiment of a camera module according to the present utility model.

Fig. 3 is an exploded view of fig. 2.

Fig. 4 is a schematic structural diagram of a circuit board in an embodiment of the camera module of the present utility model.

Fig. 5 is a longitudinal sectional view of a camera module according to an embodiment of the present utility model.

Fig. 6 is an enlarged view of a portion a in fig. 5.

Fig. 7 is an enlarged view of a portion B in fig. 5.

Fig. 8 is a longitudinal sectional view of a camera module according to an embodiment of the present utility model.

Fig. 9 is an enlarged view of a portion C in fig. 8.

The meaning of the reference numerals in the drawings are:

a circuit board A1; a photoelectric sensor A2; an infrared cut-off filter support A3; an infrared cut filter A4; a motor assembly A5; a camera A6;

a wiring board 100; a mounting groove 110; a first ring groove 111; a flexible circuit board 120; a hard wiring board 130; a void region 140; a semicircular groove 141;

a photoelectric sensor 200; gold wire 210; an infrared cut filter 300;

a motor assembly 400; a first void-avoidance groove 410; a housing 420; a fitting hole 430; pins 440;

a lens 500; an inner concave ring groove 510; a ring protrusion 520;

a bracket 600; a flat stay 610; a stand portion 620; a light transmitting region 630; and a second ring groove 640.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 2 and 3, the camera module of the present utility model includes a circuit board 100, a photoelectric sensor 200, an ir cut filter 300, a motor assembly 400 and a lens 500, which are sequentially disposed along an optical axis direction. In the illustrated embodiment, the side facing the photographing object when photographing the camera module is referred to as an object side, the side of the imaging (the side far from the object side) is referred to as an image side, and the circuit board 100, the photoelectric sensor 200, the infrared cut filter 300, and the motor module 400 are sequentially disposed from the image side to the object side. In the illustrated figures, the direction in which the object side is located is the top direction, and the direction in which the image side is located is the bottom direction, and thus the object side and the image side may also be referred to as the top direction or the bottom direction, respectively.

The circuit board 100 is defined as a rigid-flex circuit board 100, which has both flexible and rigid board support advantages, and the rigid-flex circuit board 100 is taken as an example for illustration in the following description. It should be understood that the rigid-flex circuit 100 is presented as an example only for convenience of illustration and is not intended to limit the scope of the present utility model, i.e., other forms or materials of circuit board 100 are considered acceptable in other embodiments instead of the rigid-flex circuit 100.

Referring to fig. 4, 5 and 6, the circuit board 100 is provided with a plurality of electronic components and electrical signal connectors, which are known components and will not be described in detail. The circuit board 100 is provided with a mounting groove 110 at a position corresponding to the photoelectric sensor 200, a first annular groove 111 is arranged on the periphery of the mounting groove 110, the first annular groove 111 and the mounting groove 110 are coaxially arranged, and the bottom surface of the first annular groove 111 is higher than the bottom surface of the mounting groove 110. The mounting groove 110 is configured to provide a space for assembling and keeping away the photoelectric sensor 200, and compared with directly placing the photoelectric sensor 200 on a side (hereinafter referred to as a top surface) of the circuit board 100 facing the object, the height of the camera module can be effectively reduced, so that the internal layout of the camera module is more compact. The mounting groove 110 may be configured as follows in combination with the above-mentioned soft and hard combined circuit board 100: a through groove penetrating in the optical axis direction is formed on the flexible circuit board 120 at a position corresponding to the photoelectric sensor 200, and the first annular groove 111 is disposed on the flexible circuit board 120 and is distributed around the mounting groove 110. The through groove and the region of the hard circuit board 130 opposite to the through groove are surrounded to form the mounting groove 110, and the region of the hard circuit board 130 opposite to the through groove forms the bottom surface of the mounting groove 110.

The photoelectric sensor 200 is disposed in the mounting groove 110, and the top surface height is adapted to the bottom surface height of the first ring groove 111. The periphery of the photoelectric sensor 200 is bonded to the bottom surface of the first ring groove 111 through a plurality of gold wires 210, the gold wires 210 have an arc structure with an upward curved arc, one end of each gold wire 210 is bonded to the edge of the top surface of the photoelectric sensor 200, the other end of each gold wire is bonded to the bottom surface of the first ring groove 111, and the top height (arc top height) of each gold wire 210 is matched with the top height of the circuit board 100.

Based on the foregoing arrangement of the mounting groove 110 and the first ring groove 111, the top surface of the photoelectric sensor 200 is not higher than the top surface of the circuit board 100, so that the ir cut filter 300 can be directly attached to the circuit board 100. For example, the bottom surface of the ir cut filter 300 may be directly attached to the flexible circuit board 120 at a position close to the first ring groove 111 by means of glue drawing, so that the height of the camera module may be further reduced.

Referring to fig. 8 and 9, as an alternative embodiment, the ir cut filter 300 may be further connected to the circuit board 100 through a bracket 600, so as to stably support the ir cut filter 300. In this embodiment, in order to maintain the height of the camera module directly attached to the circuit board 100 by the infrared filter cut-off sheet 300, a first space-avoiding groove 410 is disposed at the bottom of the motor assembly 400, and the dimension of the first space-avoiding groove 410 on a horizontal projection plane perpendicular to the optical axis direction is larger than the dimension of the corresponding surface of the first ring groove 111. One end of the bracket 600 facing the image side is connected with a part of the circuit board 100 located at the periphery of the photoelectric sensor 200; the bracket 600 includes a flat supporting portion 610 and a stand portion 620 formed by extending the periphery of the flat supporting portion 610 toward the image side along the optical axis direction. The size of the flat supporting portion 610 facing one side of the circuit board 100 along the optical axis direction is greater than the size of the first annular groove 111, a light-transmitting region 630 penetrating along the optical axis direction is formed at a position of the flat supporting portion 610 corresponding to the photoelectric sensor 200, a second annular groove 640 is disposed on the bracket 600 around the light-transmitting region 630, the bottom surface of the second annular groove 640 is higher than the bottom surface of the flat supporting portion 610, and the bottom surface of the infrared cut filter 300 is connected with the bottom surface of the second annular groove 640. One surface of the stand portion 620 facing the circuit board 100 is adhered to the circuit board 100 located outside the first ring groove 111. As set up above, the support 600 is provided to stably support the infrared filter, so that the height of the camera module is not increased due to the support 600, and the internal layout of the camera module is more compact.

The motor assembly 400 includes a housing 420, an assembly hole 430 penetrating in the optical axis direction is formed in the housing 420, and the lens 500 is mounted in the assembly hole 430 and fixedly connected to a hole wall. The first space avoiding groove 410 is disposed at one end of the housing 420 facing the image space, and the first space avoiding groove 410 is disposed coaxially with the assembly hole 430. The area of the first space-avoiding groove 410 on the horizontal projection plane perpendicular to the optical axis direction is larger than the area of the assembly hole 430, and the size of the first space-avoiding groove 410 is larger than the size of the ir cut filter 300, so that the ir cut filter 300 can be accommodated therein.

Referring to fig. 7, the housing 420 includes an outer housing and an inner housing, which are coaxial but annular housings of different diameters, and the inner hole of the inner housing is defined as the above-mentioned assembly hole 430 for mounting the lens 500, and the hole wall of the assembly hole 430 is adhered and fixed to the outer periphery of the lens 500. In order to increase the adhesion effect, the lens 500 and the assembly hole 430 are more firmly fixed together, a plurality of inner concave ring grooves 510 distributed along the optical axis direction are provided on the outer circumferential surface of the lens 500, an outwardly protruding ring convex part 520 is formed between two adjacent inner concave ring grooves 510, and glue is filled between the inner concave ring grooves 510 and the ring convex parts 520 of the lens 500 and the hole wall of the assembly hole 430. A plurality of magnetic induction coils are distributed on the outer shell along the circumferential direction of the outer shell, magnets matched with the magnetic induction coils are distributed on the inner shell, and each group of magnetic induction coils are electrified to generate thrust with a magnetic field so as to push the inner shell to move back and forth along the optical axis direction, so that the functions of focal length adjustment and anti-shake are realized.

The pins 440 of the motor assembly 400 protrude from the edge of the side surface of the housing 420 facing the image side, and the protruding length of the pins 440 is adapted to the thickness of the circuit board 100 along the optical axis direction. Correspondingly, the circuit board 100 is provided with a clearance area 140 corresponding to the edge of the pin 440, and the pin 440 is placed in the clearance area 140 and soldered with the circuit board 100. The void region 140 may be defined as a notch penetrating in the optical axis direction and penetrating the circuit board 100 outward in the horizontal direction, and the lead 440 is disposed in the notch and soldered to the inner wall of the notch. A spot welding groove for welding with the pin 440 may be disposed on the inner wall of the notch at a position corresponding to the pin 440, the spot welding groove is a semicircular groove 141 with a semicircular cross section, and the semicircular groove 141 penetrates through the circuit board 100 along the optical axis direction. In this embodiment, the height of the camera module may be further reduced by providing the clearance area 140 for accommodating the pins 440 on the circuit board 100.

The assembly mode of the camera module of the embodiment is as follows: firstly, fixing the lens 500 and the motor assembly 400 by the fixture positioning and height limiting, and then preferentially painting glue, namely, adhering the outer peripheral surface of the lens 500 to the wall of the assembly hole 430; next, the ir cut filter 300 and the bracket 600 are preferably fixed by the picture adhesive, i.e. the bottom edge of the ir cut filter 300 is attached to the bottom surface of the second annular groove 640; thirdly, fixing the electronic component and the electric signal connector with the soft and hard combined circuit board through an SMT process; again, the photoelectric sensor 200 and the soft and hard combined circuit board are connected at two ends through a gold wire 210 bonding process to realize mutual transmission of electric signals, namely, the photoelectric sensor 200 is bonded with the bottom surface of the first ring groove 111 through the gold wire 210; and again, the assembly after the infrared cut-off filter 300 and the bracket 600 are fixed with the soft and hard combined circuit board through the LHA technology; and then, fixing the lens 500 motor assembly 400 with the soft and hard combined circuit board through an optical active calibration process; again, the pin 440 of the motor assembly 400 is connected with the circuit board through a spot welding process, so that the motor assembly 400 is normally electrified, and the AF focusing and OIS anti-shake functions of the motor assembly 400 and the lens 500 are completed; finally, short circuits are prevented by dispensing an insulating glue after the soldering is completed at the location of the pins 440 of the motor assembly 400.

According to the camera module, the height of the camera module can be reduced by the technical means of eliminating the bracket or accommodating the bracket in the first empty avoidance groove. In the scheme of accommodating the bracket in the first clearance groove, the size of the bracket is designed to be smaller than the cross-sectional size of the shell of the Yu Mada component, so that the bracket is completely accommodated in the shell, and the shoulder height of the module is not affected by the bracket. The size of the bracket on the horizontal projection plane perpendicular to the optical axis only needs to be enough to cover the photoelectric sensor and the gold thread, and each electronic component on the circuit board is placed outside the bracket and is accommodated in the first clearance groove together with the bracket. And a clearance space is arranged at the position of the circuit board corresponding to the shell of the motor assembly, so that the shell of the motor assembly does not occupy the height of the camera module. The height of the camera module can be reduced by more than about 1mm through the design.

The foregoing examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The utility model provides a camera module, includes circuit board, photoelectric sensor, infrared cut-off filter, motor assembly and the camera lens that sets gradually along the optical axis direction, its characterized in that: the circuit board is provided with a mounting groove at the position corresponding to the photoelectric sensor, a first annular groove is formed in the circuit board around the mounting groove in a circle, the bottom surface of the first annular groove is higher than the bottom surface of the mounting groove, the photoelectric sensor is arranged in the mounting groove, the top surface of the photoelectric sensor is matched with the bottom surface of the first annular groove in height, the periphery of the photoelectric sensor is bonded with the bottom surface of the first annular groove through gold wires, and the top end of the gold wires is matched with the top surface of the circuit board in height.

2. The camera module of claim 1, wherein: the circuit board is a soft-hard combined circuit board.

3. The camera module of claim 2, wherein: a through groove penetrating along the optical axis direction is formed in the soft circuit board at a position corresponding to the photoelectric sensor, the through groove and a region, which is opposite to the through groove, on the hard circuit board are surrounded to form the mounting groove, and the region, which is opposite to the through groove, on the hard circuit board forms the bottom surface of the mounting groove; the first annular groove is arranged on the flexible circuit board and distributed around the mounting groove in a circle.

4. The camera module of claim 1, wherein: the motor assembly comprises a shell, wherein an assembly hole penetrating along the optical axis direction is formed in the shell, and the lens is installed in the assembly hole and fixedly connected with the hole wall; the one end towards the image side on the casing be provided with one with the first keep away empty groove that the coaxial intercommunication of mounting hole set up, the area of first keep away empty groove on the horizontal projection face perpendicular with the optical axis direction is greater than the area of mounting hole, just the size of first keep away empty groove is greater than the size of infrared cut-off light filter, supplies infrared cut-off light filter holds wherein.

5. The camera module of claim 4, wherein: the lens is characterized in that a plurality of inner concave ring grooves distributed along the optical axis direction are formed on the outer peripheral surface of the lens, an outwards-protruding ring convex part is formed between every two adjacent inner concave ring grooves, and glue is filled between the inner concave ring grooves and the ring convex parts of the lens and the hole wall of the assembly hole.

6. The camera module of claim 4, wherein: the size of the first clearance groove on a horizontal projection plane perpendicular to the optical axis direction is larger than the size of the corresponding surface of the first annular groove; the infrared cut-off filter is arranged in the first space-avoiding groove, and the infrared cut-off filter is arranged on the circuit board; the support comprises a flat supporting part and a vertical supporting part formed by extending the periphery of the flat supporting part towards the image space along the optical axis direction, the size of one side surface of the flat supporting part towards the circuit board along the optical axis direction is larger than that of the first annular groove, and one surface of the vertical supporting part, which is opposite to the circuit board, is adhered to the circuit board positioned outside the first annular groove.

7. The camera module of claim 6, wherein: the position department that corresponds to on the flat support portion the photoelectric sensor is formed with the printing opacity district that link up along the optical axis direction, on the support around printing opacity district a week is provided with a second annular, the bottom surface height of second annular is higher than the bottom surface height of flat support portion, the bottom surface of infrared cut-off filter with the tank bottom surface of second annular is connected.

8. The camera module of any one of claims 1 to 7, wherein: the pins of the motor protrude from the edge of one side surface of the motor facing the image space, and the protruding length of the pins is matched with the thickness of the circuit board along the optical axis direction; and the circuit board is provided with a clearance area corresponding to the edge of the pin, and the pin is arranged in the clearance area and welded with the circuit board.

9. The camera module of claim 8, wherein: the clearance area is a notch penetrating along the optical axis direction and penetrating through the circuit board outwards along the horizontal direction, and the pins are arranged in the notch and welded with the inner wall of the notch.

10. The camera module of claim 9, wherein: the spot welding groove is formed in the inner wall of the notch and corresponds to the position of the pin, the spot welding groove is a semicircular groove with a semicircular cross section, and the semicircular groove penetrates through the circuit board along the optical axis direction.