CN210327745U

CN210327745U - Camera module

Info

Publication number: CN210327745U
Application number: CN201921601072.6U
Authority: CN
Inventors: 邓彬全; 熊鑫煜
Original assignee: Jiangxi Lianyi Optics Co Ltd
Current assignee: Jiangxi Lianyi Optics Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-04-14
Anticipated expiration: 2029-09-25

Abstract

The utility model provides a camera module, which comprises a lens, the microscope base, the image sensor subassembly, the microscope base is equipped with the first pilot hole of installation camera lens and the second pilot hole of installation image sensor subassembly, first pilot hole is from the first surface, the second pilot hole is from the second surface, first pilot hole and second pilot hole are linked together and coaxial in microscope base inside, first pilot hole is including following location guide cylinder and the internal thread that first surface set up to the direction on second surface in proper order, the camera lens is including the internal screw thread of cooperation, the location guide step of cooperation location guide cylinder, the spacing ring of cooperation first surface, the image sensor subassembly pastes in the second surface. Can guarantee through twice focusing that camera module can not receive the bonding medium because of toasting the solidification and produce the influence that warp, improve camera module image quality.

Description

Camera module

Technical Field

The utility model relates to a camera technical field especially relates to a camera module.

Background

The camera module in the market generally includes a lens, a lens holder and an image sensor assembly, and it is always the direction of research of related technicians how to combine the above components well and ensure the requirements of optical performance and the position relationship of mechanical assembly. The related art is assembled by connecting the lens base and the image sensor assembly through a bonding medium (such as glue), connecting the lens and the lens base through the bonding medium, finely adjusting the position of the lens through an automatic focusing technology to enable the focus of the lens to fall on the center of the image sensor, and enabling the optical axis of the lens to coincide with the normal line of the center of the image sensor through an automatic aligning technology.

However, the above-described assembly method has many disadvantages. Because the lens base, the image sensor assembly, the lens base and the lens are fixed in a bonding medium mode, the bonding medium is easy to deform due to baking and curing, and the focus of the lens deviates.

Therefore the utility model provides a camera module, assembly structure including camera lens, microscope base and image sensor subassembly still through interior external screw thread connection, exposed core and the position relation design in excessive gluey hole, can guarantee through twice focusing that camera module can not receive the bonding medium because of toasting the influence that the solidification produced the deformation, improves camera module image quality.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a camera module, which solves the problem of deformation caused by baking glue between the lens and the lens holder and between the lens holder and the image sensor module, and improves the yield of finished products.

In order to achieve the above purpose, the present invention adopts the following technical solution.

The embodiment of the utility model provides a camera module, camera module include microscope base, camera lens and image sensor subassembly.

The microscope base comprises a first surface and a second surface, the first surface is opposite to the second surface, and the microscope base is provided with a first assembling hole, a second assembling hole, a positioning hole and a screw hole; the first assembling hole is communicated with the second assembling hole in the lens base and is coaxial with the second assembling hole, the first assembling hole is used for assembling the lens, and the second assembling hole is used for accommodating the image sensor; the first assembling hole comprises a positioning guide cylinder and an internal thread, and the positioning guide cylinder and the internal thread are sequentially arranged along the direction from the first surface to the second surface; the positioning holes and the screw holes are through holes and are used for positioning and mounting finished equipment respectively.

The camera lens includes external screw thread, location direction step and spacing ring, and external screw thread and interior screw-thread fit, location direction step are installed in location guide cylinder, and the spacing ring is installed in the first surface.

The image sensor assembly comprises an image sensor and a circuit board, and the image sensor assembly is attached to the second surface.

Providing another lens, wherein the lens comprises an external thread, a positioning guide step and a limiting ring; the positioning guide step is positioned between the external thread and the limiting ring; the limiting ring comprises a third surface and a fourth surface, the third surface faces the positioning and orienting step, and the third surface is opposite to the fourth surface; the lens is screwed into the first assembling hole through the positioning guide cylinder part, and the external thread and the internal thread are matched with each other, so that the optical axis of the lens is superposed with the central line of the first assembling hole.

Providing another image sensor and a circuit board, and attaching the image sensor to the surface of the circuit board to realize the installation of an image sensor assembly; and arranging the image sensor assembly on the second surface of the lens base, filling the bonding medium, accommodating the image sensor in the second assembling hole, and adjusting the position of the image sensor assembly to enable the optical axis of the lens to coincide with the central normal of the image sensor.

And baking and curing the bonding medium between the lens base and the image sensor assembly.

And filling an adhesive medium between the third surface of the limiting ring and the first surface of the lens base, screwing the lens, and adjusting the distance between the lens and the image sensor to enable the focus of the lens to coincide with the center of the image sensor.

And baking and curing the bonding medium between the lens and the lens base to complete the assembly of the camera module.

As the utility model discloses preferably, the ring design has the clamping part that is used for making things convenient for the focusing before the camera lens.

As the utility model discloses it is preferred, adopt inside and outside screw thread to add the bonding medium fixed between camera lens and the microscope base.

As the utility model discloses preferred, the side of second pilot hole is equipped with a plurality of glue overflow holes.

The utility model provides a camera module has following advantage at least:

(1) the utility model provides a camera module, through twice focusing guarantee the optical axis of camera lens and the coincidence of image sensor's central normal, and the focus of camera lens falls on image sensor's center, improved camera module's image quality, improved product finished product yield;

(2) the utility model provides a camera module, through location direction step and location guide cylinder, internal thread and external screw thread connection not only guaranteed the optical axis of camera lens and the coincidence of the central line of first pilot hole, guaranteed moreover that the focus of camera lens can not toast the solidification and produce and warp and lead to the skew owing to the bonding medium between camera lens and microscope base, microscope base and the image sensor subassembly.

Drawings

Fig. 1 is an exploded view of a camera module according to an embodiment of the present invention.

Fig. 2 is a structural diagram of a camera module provided in an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a camera module provided in an embodiment of the present invention.

Fig. 4 is a lens structure diagram of a camera module according to an embodiment of the present invention.

Fig. 5 is a view of a lens holder structure of a camera module according to an embodiment of the present invention.

Fig. 6 is a view of an image sensor assembly structure of a camera module according to an embodiment of the present invention.

Description of the main element symbols: the lens module 10, the lens 100, the limiting ring 101, the positioning guide step 102, the external thread 103, the third surface 104, the fourth surface 105, the lens holder 200, the first surface 201, the second surface 202, the first assembly hole 203, the second assembly hole 204, the positioning guide cylinder 205, the internal thread 206, the positioning hole 207, the screw hole 208, the image sensor assembly 300, the image sensor 301, and the circuit board 302.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

It will be understood by those skilled in the art that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships that are based on those shown in the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.

Specifically, in this embodiment, please refer to fig. 1, which shows an exploded view of a camera module according to an embodiment of the present invention, for a camera module with a special positioning reference requirement, the optical axis of the lens in the module needs to coincide with the normal of the image sensor, and the size requirement relative to the positioning reference needs to be satisfied.

Specifically, in the embodiment, please refer to fig. 2, which shows a structure diagram of a camera module according to an embodiment of the present invention, wherein the lens holder 200 is used for assembling the lens 100. The image sensor assembly 300 is attached to the lens holder 200.

Specifically, in the embodiment, please refer to fig. 4, which shows a lens structure diagram of a camera module according to an embodiment of the present invention, a lens 100; a plurality of groups of lenses are arranged in the lens 100, and can focus light rays emitted by a shot object, generally, the periphery of the lens is wrapped by a lens shell to form assembly of the plurality of groups of lenses, and a structure formed by the lens and the lens shell is called the lens 100 in a combined manner; in order to increase the convenience and stability of the lens 100 when assembled, the lens 100 includes a retainer ring 101, a positioning guide step 102, and an external thread 103.

Specifically, in the embodiment, please refer to fig. 5, which shows a lens base structure diagram of a camera module according to an embodiment of the present invention, a lens base 200; the lens holder 200 is used for assembling the lens 100; when the lens holder 200 is assembled, the lens 100 is sleeved in the first assembling hole 203, the positioning guide step 102 ensures that the lens 100 is coaxial with the first assembling hole 203 under the constraint of the positioning guide cylinder 205, the external thread 103 ensures the stability of the lens 100 under the constraint of the internal thread 206, the third surface 104 of the limit ring 101 is connected with the first surface 201 of the lens holder 200 through the bonding medium, and the stability between the lens 100 and the lens holder 200 is ensured;

the lens holder 200 includes a second mounting hole 204 for receiving the image sensor assembly 300; when assembling, the image sensor 300 is fixed with the lens holder 200 by using an adhesive medium, and the second surface 202 of the lens holder 200 is connected with the circuit board 302 of the image sensor assembly 300 by the adhesive medium;

the lens base 200 comprises positioning holes 207 and screw holes 208, the positioning holes 207 are circular holes and elliptical holes, the number of the positioning holes 207 is two, the two positioning holes are respectively positioned on two sides of the first assembling hole 203, and the positioning holes 207 are used for positioning when being installed with finished equipment; the screw holes 208 are circular holes, the number of the screw holes 208 is two, the two screw holes 208 are respectively positioned on two sides of the first assembling hole 203, and the screw holes 208 are used for being installed with finished equipment; the finished product device may be a communication device such as a mobile phone and a tablet, or a shooting device such as a digital camera and a single lens reflex, and the camera module 10 is installed in the finished product device through the screw hole 208 to realize the shooting function of the finished product device.

Specifically, in the embodiment, please refer to fig. 6, which shows an image sensor structure diagram of a camera module according to an embodiment of the present invention, an image sensor assembly 300; the image sensor 301 is attached to the circuit board 302 by surface mount technology.

Specifically, in the present embodiment, the lens holder 200 is made of a metal material, and it can be understood that, in the material selection process, a material with light weight, moderate price, and good elastic strain and plastic strain capability, such as an aluminum alloy, can be selected.

Specifically, in this embodiment, the bonding medium is an AA adhesive, a UV adhesive, a thermosetting adhesive, a UV thermosetting adhesive, an epoxy adhesive, a pressure-sensitive adhesive, a moisture-curable adhesive, or a light-curable adhesive, which may be a combination of one or more of the foregoing adhesives.

Referring to fig. 3, an assembly process of the camera module 10 according to an embodiment of the present invention includes the following steps:

(1) providing a mirror base 200 (fig. 5), wherein the mirror base 200 comprises a first surface 201 and a second surface 202, and the first surface 201 and the second surface 202 are opposite; the microscope base 200 is provided with a first assembling hole 203, a second assembling hole 204, a positioning hole 207 and a screw hole 208, the first assembling hole 203 starts from a first surface 201, the second assembling hole 204 starts from a second surface 202, and the first assembling hole 203 and the second assembling hole 204 are communicated and coaxial in the interior of the microscope base 200; the first assembly hole 203 comprises a positioning guide cylinder 205 and an internal thread 206, and the positioning guide cylinder 205 and the internal thread 206 are sequentially arranged along the first surface 201 towards the second surface 202;

(2) providing a lens 100 (fig. 4), wherein the lens 100 comprises a limit ring 101, a positioning guide step 102 and an external thread 103, and the positioning guide step 102 is positioned between the limit ring 101 and the external thread 103; the stop collar 101 comprises a third surface 104 and a fourth surface 105, the third surface 104 faces the positioning and orienting step 102, and the third surface 104 is opposite to the fourth surface 105;

(3) partially screwing the lens 100 into the first assembly hole 203 through the positioning guide cylinder 205, and enabling the optical axis of the lens 100 to be coincident with the central line of the first assembly hole 203 through the mutual matching of the external thread 103 and the internal thread 206;

(4) providing an image sensor 301 (fig. 6) and a circuit board 302, and attaching the image sensor 301 to the surface of the circuit board 302 to realize the installation of the image sensor assembly 300;

(5) arranging the image sensor assembly 300 on the second surface 202 of the lens base 200, filling an adhesive medium, accommodating the image sensor 301 in the second assembly hole 204, adjusting the position of the image sensor assembly 300 by using an automatic centering technology, so that the focus of the lens 100 is coincided with the center of the image sensor 301, and the optical axis of the lens 100 is coincided with the central normal of the image sensor 301;

(6) baking and curing the bonding medium between the lens base 200 and the image sensor assembly 300;

(7) filling an adhesive medium between the third surface 104 of the limit ring 101 and the first surface 201 of the lens holder 200, screwing the lens 200, and adjusting the distance between the lens 200 and the image sensor 301 to make the focus of the lens 200 coincide with the center of the image sensor 301;

(8) and baking and curing the bonding medium between the lens 100 and the lens holder 200 to complete the assembly of the camera module 10.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a camera module which characterized in that includes: the lens base, the lens and the image sensor assembly;

the lens base comprises a first surface and a second surface, and the first surface is opposite to the second surface; the lens base is provided with a first assembling hole, a second assembling hole, a positioning hole and a screw hole; the first assembly hole is from the first surface, the second assembly hole is from the second surface, the first assembly hole and the second assembly hole are communicated and coaxial in the lens base, the first assembly hole is used for assembling the lens, and the second assembly hole is used for accommodating the image sensor; the first assembling hole comprises a positioning guide cylinder and an internal thread, and the positioning guide cylinder and the internal thread are sequentially arranged along the first surface towards the second surface; the positioning holes and the screw holes are through holes and are respectively used for positioning and mounting a finished product;

the lens comprises an external thread, a positioning guide step and a limiting ring, the external thread is matched with the internal thread, the positioning guide step is installed on the positioning guide cylinder, and the limiting ring is installed on the first surface; the image sensor assembly comprises an image sensor and a circuit board, and the image sensor assembly is attached to the second surface.

2. The camera module of claim 1, wherein the lens is designed with a clamping portion for facilitating focusing.

3. The camera module of claim 1, wherein the positioning guide step and the positioning guide cylinder are transition fit.

4. The camera module of claim 1, wherein the external threads are a clearance fit with the internal threads.

5. The camera module according to claim 1, wherein the second assembling hole has a glue overflow hole on a side surface thereof.

6. The camera module according to claim 1, wherein bonding media are filled between the lens and the lens holder and between the lens holder and the image sensor assembly.

7. The camera module according to claim 6, wherein the bonding medium is one or a combination of AA adhesive, UV adhesive, thermosetting adhesive, UV thermosetting adhesive, epoxy adhesive, pressure-sensitive adhesive and photo-curing adhesive.