CN209767675U - Camera module - Google Patents
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- CN209767675U CN209767675U CN201921205131.8U CN201921205131U CN209767675U CN 209767675 U CN209767675 U CN 209767675U CN 201921205131 U CN201921205131 U CN 201921205131U CN 209767675 U CN209767675 U CN 209767675U
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- lens
- image sensor
- camera module
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- sensor assembly
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Abstract
The utility model provides a camera module, which comprises a lens, a lens base, an image sensor assembly and a fixing device; the bottom of the lens is provided with an external thread; a limiting ring is arranged in the middle of the lens, and a positioning guide step is arranged between the external thread at the bottom of the lens and the limiting ring; the microscope base comprises a lens assembly hole, the lens assembly hole penetrates through the microscope base, and the upper end part of the lens assembly hole sinks to form a bearing platform; an annular boss with internal threads is formed at the bottom of the lens assembling hole; a positioning guide cylinder is arranged between the bearing table and the annular boss; the fixing device is used for fixedly mounting the lens and the image sensor assembly on the lens base, and the stability of the connection between the lens and the lens base and the connection between the lens base and the image sensor assembly are ensured, so that the focus of the lens coincides with the center of the image sensor and the optical axis of the lens coincides with the center normal of the image sensor.
Description
Technical Field
The utility model belongs to the technical field of the camera module, a assembly structure of camera lens, microscope base and image sensor subassembly is related to, especially, relate to a camera module.
Background
The camera module in the market generally includes lens, microscope base and image sensor subassembly. In the process of assembling the camera module, how to combine the components well and ensure the requirements of optical performance and the position relation of mechanical assembly are always the research direction of related technicians.
The common assembly method is to attach the image sensor to the circuit board by SMT (surface mount technology), then connect the lens holder to the image sensor assembly by screws, connect the lens and the lens holder by gluing, fine-tune the position of the lens by an automatic focusing technology, make the focus of the lens fall on the center of the image sensor, and make the optical axis of the lens coincide with the normal of the center of the image sensor by an automatic aligning technology.
Because the lens base and the image sensor assembly, and the lens base are fixed in a gluing mode, the mode completely depends on the strength of the adhesive force of glue, and the hidden trouble that the image sensor assembly falls off easily occurs. And the friction can drop the residue during the assembly to can cause the pollution to devices such as image sensor, influence formation of image quality. In addition, there is the degree of difficulty in some glue, and the volume of glue is also difficult to control.
Therefore, a camera module structure is needed to be designed, which enables the lens, the lens holder and the image sensor assembly to have high bonding strength, is convenient to install, is not easy to fall off, and can not pollute devices such as the image sensor and the like and influence the imaging quality.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a camera module, which can solve the problem of risk of loosing between the lens and the lens holder and between the lens holder and the image sensor module, and facilitate assembly of the camera module.
In order to realize the purpose, the utility model discloses a technical scheme be:
A camera module includes: the lens, the lens base, the image sensor assembly and the fixing device; the lens is fixedly arranged on the microscope base, and the image sensor assembly is attached to and arranged below the microscope base;
The bottom of the lens is provided with an external thread; a limiting ring is arranged in the middle of the lens, and a positioning guide step is arranged between the external thread at the bottom of the lens and the limiting ring;
The microscope base comprises a lens assembly hole, the lens assembly hole penetrates through the microscope base, and the upper end part of the lens assembly hole sinks to form a bearing platform; an annular boss with internal threads is formed at the bottom of the lens assembling hole; a positioning guide cylinder is arranged between the bearing table and the annular boss; the lens base also comprises a screw hole for mounting the anti-loosening screw;
The image sensor assembly comprises an image sensor and a circuit board; the image sensor assembly is formed by attaching the image sensor to the surface of the circuit board; the image sensor is accommodated at the bottom of the lens assembling hole;
The fixing device is used for fixing the lens and the lens base, and the lens base and the image sensor assembly.
Furthermore, the positioning guide step and the positioning guide cylinder are in transition fit, the lens and the lens base can be more conveniently installed due to the positioning guide step and the positioning guide cylinder, and the accurate installation positioning is effectively guaranteed.
Further, the external thread and the internal thread are in clearance fit.
further, the microscope base also comprises a positioning column for mounting finished equipment.
Furthermore, the anti-loosening screw is divided into a first anti-loosening screw and a second anti-loosening screw, the first anti-loosening screw is used for fixing the lens and the lens base, and the second anti-loosening screw is used for fixing the lens base and the image sensor assembly.
Furthermore, first locking screw sets up to two at least, first locking screw and the screw hole cooperation on the microscope base is fixed, just first locking screw supports and leans on the upper end of spacing ring. The setting of first locking screw that takes off can guarantee the space that the camera lens does not have axial displacement to improve the steadiness that camera lens and microscope base are connected, and made things convenient for processes such as later stage reworking, maintenance.
Furthermore, at least one second anti-loosening screw is arranged, and the second anti-loosening screw penetrates through the image sensor assembly to be matched and fixed with the screw hole in the lens base. The setting of the second anti-loosening screw can effectively avoid the problem that the glue of the mirror base and the image sensor assembly fails due to vibration, high temperature and other reasons, so that the stability of the connection of the mirror base and the image sensor assembly is improved.
Furthermore, an adhesive medium is filled between the second anti-loosening screw and the image sensor assembly to form elastic connection.
Further, the bonding medium may be one or a combination of AA glue, UV glue, thermosetting glue, UV thermosetting glue, epoxy glue, pressure sensitive glue and photo-curing glue.
The utility model provides an advantage that camera module has: the utility model can effectively avoid the problem of glue failure caused by vibration, high temperature and the like by using the anti-loosening screw, ensure the connection stability of the lens and the lens base and the image sensor assembly, and facilitate the working procedures of rework, maintenance and the like at the later stage; so that the focus of the lens coincides with the center of the image sensor and the optical axis of the lens coincides with the center normal of the image sensor.
drawings
Fig. 1 is an exploded view of a camera module according to an embodiment of the present invention.
fig. 2 is a lens structure diagram of a camera module according to an embodiment of the present invention.
Fig. 3 is a sectional view of a lens holder of a camera module according to an embodiment of the present invention.
Fig. 4 is a view of an image sensor assembly structure of a camera module according to an embodiment of the present invention.
Fig. 5 is a cross-sectional view of a camera module according to an embodiment of the present invention.
Fig. 6 is a structural diagram of a camera module according to an embodiment of the present invention.
Description of the main element symbols: 10. a camera module; 100. a lens; 101. a limiting ring; 102. positioning a guide step; 103. an external thread; 200. a lens base; 201. a positioning column; 202. a first screw hole; 203. a bearing table; 204. positioning a guide cylinder; 205. an internal thread; 206. a second screw hole; 300. an image sensor assembly; 301. an image sensor; 302. a through hole; 303. a circuit board; 400. a first anti-loosening screw; 500. a second anti-loosening screw.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, an exploded view of a camera module 10 according to an embodiment of the present invention is shown, for a camera module with a special positioning reference requirement, in which a lens optical axis needs to coincide with a normal of an image sensor, and a size requirement for the positioning reference is to be satisfied.
Specifically, in the present embodiment, the camera module 10 includes a lens 100, a lens holder 200 for assembling the lens 100, a first anti-loose screw 400 for pressing and fixing the lens 100 and the lens holder 200, an image sensor assembly 300, a second anti-loose screw 500 for fastening the image sensor assembly 300 and the lens holder 200, and a positioning post 201 for mounting a finished device.
Specifically, in this embodiment, please refer to fig. 2, which shows a structural diagram of a lens 100 according to an embodiment of the present invention, wherein an external thread 103 is designed at the bottom of the lens 100, and a positioning guiding step 102 is designed at the upper portion of the external thread 103 to ensure that the lens is smoothly screwed into a lens assembling hole of a lens holder 200; the upper part of the positioning guide step 102 is provided with a limiting ring 101 protruding outwards to ensure that the lens 100 stops to a proper position after being screwed into the lens base 200, so as to avoid the inconsistent size of the back focal length of the lenses of batch products.
Specifically, in this embodiment, please refer to fig. 3, which shows a cross-sectional view of a lens mount 200 provided in an embodiment of the present invention, the lens mount 200 is provided with a lens assembling hole, the lens assembling hole is disposed in the lens mount 200 in a penetrating manner, two first screw holes 202 are disposed at an upper opening of the lens assembling hole of the lens mount 200, an upper end portion of the lens assembling hole sinks to form a bearing platform 203, and the limiting ring 101 abuts against the bearing platform 203 to ensure that the lens 100 stops to a proper position after being screwed into the lens mount 200. The lower part of the bearing table 203 is provided with a positioning guide cylinder 204, and the positioning guide step 102 and the positioning guide cylinder 204 are in transition fit to smoothly guide the lens 100 to be screwed in. The lower part of the positioning guide cylinder 204 is designed with an internal thread 205, and after the external thread 103 of the lens 100 is screwed in, the external thread 103 and the internal thread 205 are in clearance fit to achieve the purpose of tight connection. The lower surface of the lens holder 200 is provided with three second screw holes 206.
specifically, in the present embodiment, in order to make the connection between the lens 100 and the lens holder 200 more stable, two first anti-loosening screws 400 are symmetrically arranged; it is understood that in other embodiments, the first anti-loose screw 400 may be provided in a plurality of, but at least two. The first anti-loose screw 400 has a screw thread designed with a glue dropping resistance, and a larger top nut, which is engaged with the first screw hole 202 to compress the lens 100. Set up first locking screw 400 here and can guarantee that camera lens 100 does not have the space of axial displacement to improve the steadiness that camera lens 100 is connected with microscope base 200, and made things convenient for processes such as later stage reworking, maintenance.
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, please refer to fig. 4, which shows a structure diagram of an image sensor assembly 300 according to an embodiment of the present invention, wherein the image sensor assembly 300 is formed by attaching an image sensor 301 and a circuit board 303, and is provided with a through hole 302, and the through hole 302 is disposed corresponding to the second screw hole 206. In order to better fix the lens holder 200 and the image sensor assembly 300, three second anti-loose screws 500 may be provided; it is understood that in other embodiments, at least one second anti-loosening screw 500 may be provided. The second screw hole 206 and the through hole 302 are disposed corresponding to the second anti-loose screw 500, so that the second anti-loose screw 500 passes through the through hole 302 of the image sensor assembly 300 and is fixed to the second screw hole 206 of the lens holder 200. The second anti-loose screw 500 is arranged at the position, so that the problem of glue failure caused by vibration, high temperature and other reasons when the microscope base 200 is attached to the image sensor assembly 300 can be effectively solved, and the connection stability of the microscope base 200 and the image sensor assembly 300 is improved.
the embodiment of the utility model provides a camera module 10's equipment technology step as follows:
(1) The lens 100 is screwed into the lens assembling hole through the positioning guide cylinder 204, the external thread 103 and the internal thread 205 are matched and screwed, and when the limiting ring 101 abuts against the bearing platform 203, the lens 100 and the lens base 200 are axially clamped;
(2) Screwing the first anti-loose screw 400 into the first screw hole 202 of the lens holder 200, and when the first anti-loose screw 400 abuts against the upper end of the limiting ring 101, realizing the fixed connection between the lens 100 and the lens holder 200;
(3) attaching the image sensor 301 to the surface of the circuit board 303 to realize the installation of the image sensor assembly 300;
(4) arranging the image sensor assembly 300 below the lens base 200, filling glue, accommodating the image sensor 301 at the bottom of the lens assembly hole, and adjusting the position of the image sensor assembly 300 by an automatic focusing technology and an automatic aligning technology to ensure 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;
(5) Curing the glue between the lens base 200 and the image sensor assembly 300;
(6) The second anti-loose screw 500 is screwed into the second screw hole 206 of the lens holder 200, the bonding medium is filled between the second anti-loose screw 500 and the image sensor assembly 300 to form an elastic connection, and the image sensor assembly 300 is locked on the lens holder 200 by the second anti-loose screw 500, thereby completing the assembly of the camera module 10.
Specifically, please refer to fig. 5, which shows a cross-sectional view of the camera module 10 according to an embodiment of the present invention after assembly, when assembling, the lens base 200 is first placed in the positioning fixture to position the lens base 200, the lens 100 is screwed into the lens assembling hole of the lens base 200, then the first anti-loosening screw 400 is screwed into the first screw hole 202 of the lens base 200 by the screwdriver, and the lens 100 is fixed in the lens base 200 by the tightening force of the first anti-loosening screw 400, so as to achieve the stable connection between the lens 100 and the lens base 200.
after the lens 100 and the lens holder 200 are assembled, the optical axis center of the lens 100 is opposite to the positioning columns 201 on both sides, which is the positioning reference, so as to meet the size requirement. The image sensor assembly 300 is arranged below the lens base 200 and filled with glue, the image sensor assembly 300 is adjusted to a proper position through an automatic focusing technology and an automatic aligning technology, the focus of the lens 100 is coincided with the center of the image sensor 301, the optical axis of the lens 100 is coincided with the center normal of the image sensor 301, and then the glue is solidified, so that the image sensor assembly 300 is attached and installed below the lens base 200. In consideration of the failure of the thermosetting glue, the second anti-loose screw 500 is added to firmly lock the image sensor assembly 300 below the lens holder 200, and the bonding medium between the second anti-loose screw 500 and the image sensor assembly 300 is filled to form an elastic connection, so as to achieve the purpose of assembling the camera module 10 with special positioning requirements. The bonding medium is AA glue, UV glue, thermosetting glue, UV thermosetting glue, epoxy resin glue, pressure-sensitive glue and light-cured glue, and can be one or a combination of more of the above.
specifically, please refer to fig. 6, it is shown that the embodiment of the utility model provides an effect picture after camera module 10 installs, adopt above-mentioned technology to carry out the camera module 10 of assembling, through earlier with camera lens and the fixed unification of optical axis for microscope base reference column reference position of having guaranteed the camera lens of microscope base assembly, then use the microscope base as the benchmark, adjust the image sensor subassembly to suitable position and fix the microscope base below, thereby the coincidence of camera lens optical axis and image sensor normal has been guaranteed, can satisfy the dimensional requirement for the location benchmark, uniformity when guaranteeing the module and being used for the installation of finished product equipment.
the above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. The utility model provides a camera module which characterized in that includes: the lens, the lens base, the image sensor assembly and the fixing device;
The bottom of the lens is provided with an external thread; a limiting ring is arranged in the middle of the lens, and a positioning guide step is arranged between the external thread and the limiting ring;
The microscope base comprises a lens assembly hole, the lens assembly hole penetrates through the microscope base, and the upper end part of the lens assembly hole sinks to form a bearing platform; an annular boss with internal threads is formed at the bottom of the lens assembling hole; a positioning guide cylinder is arranged between the bearing table and the annular boss;
The fixing device is used for fixedly mounting the lens and the image sensor assembly on the lens base.
2. the camera module of claim 1, wherein the positioning guide step and the positioning guide cylinder are transition fit.
3. The camera module of claim 1, wherein the external threads are a clearance fit with the internal threads.
4. The camera module of claim 1, wherein the lens mount further comprises a positioning post for finished equipment installation.
5. The camera module according to claim 1, wherein the fixing device comprises a first anti-loose screw and a second anti-loose screw, the first anti-loose screw is used for fixing the lens and the lens holder, and the second anti-loose screw is used for fixing the lens holder and the image sensor assembly.
6. The camera module according to claim 5, wherein the number of the first anti-loose screws is at least two, the first anti-loose screws are fixed to the screw holes of the lens holder in a matching manner, and the first anti-loose screws abut against the upper end of the limiting ring.
7. The camera module according to claim 5, wherein at least one second anti-loose screw is provided, and the second anti-loose screw passes through the image sensor assembly and is fixed in cooperation with a screw hole on the lens holder.
8. The camera module of claim 5, wherein the second anti-loosening screw is elastically connected to the image sensor assembly by filling an adhesive medium therebetween.
9. The camera module of claim 8, wherein the bonding medium is one or more of an AA adhesive, a UV adhesive, a thermosetting adhesive, a UV thermosetting adhesive, an epoxy adhesive, a pressure sensitive adhesive, and a photo-curing adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205131.8U CN209767675U (en) | 2019-07-29 | 2019-07-29 | Camera module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205131.8U CN209767675U (en) | 2019-07-29 | 2019-07-29 | Camera module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209767675U true CN209767675U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921205131.8U Active CN209767675U (en) | 2019-07-29 | 2019-07-29 | Camera module |
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| CN (1) | CN209767675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709337A (en) * | 2021-08-17 | 2021-11-26 | 信利光电股份有限公司 | Camera module and active focusing process |
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2019
- 2019-07-29 CN CN201921205131.8U patent/CN209767675U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709337A (en) * | 2021-08-17 | 2021-11-26 | 信利光电股份有限公司 | Camera module and active focusing process |
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