CN212572680U

CN212572680U - Camera module

Info

Publication number: CN212572680U
Application number: CN202020570601.7U
Authority: CN
Inventors: 谭建华
Original assignee: Kunshan Q Technology Co Ltd
Current assignee: Kunshan Q Technology Co Ltd
Priority date: 2020-01-14
Filing date: 2020-04-16
Publication date: 2021-02-19
Anticipated expiration: 2030-04-16

Abstract

The utility model provides a camera module, which comprises a circuit board, a photosensitive element, a base, a first lens component, a second lens component and a driving device, wherein the photosensitive element and the base are arranged on the circuit board; the outer side wall of the second lens component is provided with a first groove, and the inner side wall of the driving device is provided with a second groove. The camera module provided by the utility model can realize the micro-focus shooting and obtain good imaging effect by arranging two lens components and matching with the light guide piece and the light source component for light filling; and, through setting up first recess and the second recess that supplies glue to fill, can improve the bonding strength of second lens subassembly and drive arrangement.

Description

Camera module

Technical Field

The utility model relates to an imaging technology field especially relates to a camera module.

Background

With the progress of science and technology, the application of the camera is more and more extensive, and at present, except cameras, mobile phones, computers and other electronic products are equipped with the camera, so that people can take pictures at any time and any place conveniently, and convenience and fun are brought to the life of people.

Under the condition that the cameras are more and more popular, people have more and more requirements on the functions of the cameras, and the ultra-micro distance camera is a development direction at present. Such an ultra-fine distance camera is required in order to be able to capture the detailed features of an object at a close distance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a camera module of super microspur.

The utility model provides a camera module, which comprises a circuit board, a photosensitive element, a base, a first lens component, a second lens component and a driving device, wherein the photosensitive element and the base are arranged on the circuit board;

the outer side wall of the second lens component is provided with a first groove, and the inner side wall of the driving device is provided with a second groove.

In one embodiment, a portion of the second lens assembly provided with the first groove corresponds to a portion of the driving device provided with the second groove.

In one embodiment, the outer side wall of the second lens assembly is further provided with a notch, the notch is arranged at the position of the second lens assembly, where the first groove is arranged, the notch is communicated with the first groove and the second groove and is in an open shape towards the side far away from the circuit board.

In one embodiment, the plurality of notches are uniformly arranged on the second lens assembly along the circumferential direction.

In one embodiment, the second lens assembly includes a second lens group and a second lens barrel, the second lens group is assembled in the second lens barrel, and the first groove is opened on the second lens barrel; the driving device can be a voice coil motor, the voice coil motor comprises a shell, a magnet, a carrier and a coil, the magnet is arranged on the shell, the coil is arranged on the carrier, the second lens component is fixed on the carrier, and the second groove is formed in the carrier.

In one embodiment, an extension portion protrudes downward from the bottom edge of the second barrel, and the extension portion is matched with the driving device.

In one embodiment, an end of the first lens assembly, which is away from the circuit board, protrudes into a space defined by the extension portion of the second lens assembly, and a relief portion is formed corresponding to the extension portion.

In one embodiment, the first groove is formed on the outer circumferential surface of the extension portion.

In one embodiment, the camera module further includes a light guide member and a light source assembly, the light guide member is disposed outside the second lens assembly, and the light source assembly is disposed at the bottom of the light guide member.

In one embodiment, the light guide is annular and surrounds the entire outer side of the second lens assembly; or, the light guide part comprises an upper part and a lower part, a step surface is formed at the joint of the upper part and the lower part, and the step surface is tightly attached to the top surface of the driving device.

In one embodiment, the light source assembly includes a plurality of light sources and a bottom plate, the plurality of light sources are circumferentially disposed at the bottom of the light guide, the plurality of light sources are fixed on the bottom plate, and the bottom plate is fixed relative to the base.

In one embodiment, the camera module further includes a cover plate, and the cover plate is covered on the top of the light guide and located on a side of the second lens assembly away from the photosensitive element; the camera module further comprises an optical filter, an inward protruding fixing table is formed on the inner wall of the base, the optical filter is fixed on the fixing table, and the optical filter is located between the photosensitive element and the first lens assembly and between the second lens assembly.

In one embodiment, the first groove is recessed inwards along the outer peripheral surface of the second lens assembly to form a ring shape, and the second groove is recessed inwards from the inner side wall surface of the driving device to form a ring shape.

In one embodiment, in a direction of an optical axis of the second lens assembly, a width of the first groove is greater than a width of the second groove, and/or the first groove and the second groove are staggered.

The camera module provided by the utility model can realize the micro-focus shooting and obtain good imaging effect by arranging two lens components and matching with the light guide piece and the light source component for light filling; and, through setting up first recess and the second recess that supplies glue to fill, can improve the bonding strength of second lens subassembly and drive arrangement.

Drawings

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

Fig. 2 is an exploded perspective view of the camera module shown in fig. 1.

Fig. 3 is a sectional view of the camera module shown in fig. 1.

Fig. 4 is a schematic structural diagram of a second lens assembly of the camera module shown in fig. 1.

Fig. 5 is a flowchart of a method for manufacturing a camera module according to an embodiment of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.

As shown in fig. 1 to fig. 3, the camera module according to an embodiment of the present invention includes a circuit board 11, a photosensitive element 13, a base 15, a filter 17, a first lens assembly 19, a second lens assembly 21, a driving device 23, a light guide 25, a light source assembly 27, and a cover plate 29.

In this embodiment, the photosensitive element 13 and the base 15 are both disposed on the circuit board 11, the base 15 forms a cavity 152, and the photosensitive element 13 is accommodated in the cavity 152. Specifically, the wiring board 11 may be a flexible circuit board. The photosensitive element 13 may be a photosensitive chip, such as a CCD (Charge Coupled Device) photosensitive chip or a CMOS (Complementary Metal Oxide Semiconductor) photosensitive chip. The photosensitive element 13 is electrically connected to the circuit board 11 to transmit the electrical signal to the circuit board 11. The inner wall of the base 15 is formed with a fixing stand 154 protruded inward.

In this embodiment, the filter 17 is disposed on the fixing stage 154, and the filter 17 is located between the photosensitive element 13 and the first and

second lens assemblies

19 and 21. In this embodiment, the filter 17 is provided below the fixing stage 154. It is understood that the filter 17 may also be positioned above the fixed stage 154. The filter 1 may be fixed on the fixing stage 154 by glue.

In this embodiment, the first lens assembly 19 is disposed on the base 15. Specifically, the first lens assembly 19 includes a first lens group and a first lens barrel, the first lens group is assembled in the first lens barrel, an external thread is disposed on an outer side of the first lens barrel, an internal thread is disposed on an inner wall of the base 15, and the first lens assembly 19 is fixed in the base 15. The first lens assembly 19 is a fixed focus lens.

In this embodiment, the second lens assembly 21 is disposed on the driving device 23, and the driving device 23 is disposed on the base 15, so that the second lens assembly 21 is located on a side of the first lens assembly 19 away from the photosensitive element 13. Specifically, the driving device 23 is provided on a side of the base 15 away from the wiring board 11. The second lens assembly 21 is a zoom lens.

The second lens assembly 21 includes a second lens group and a second lens barrel, and the second lens group is assembled in the second lens barrel. An extension 212 protrudes downward from the bottom edge of the second barrel, and the extension 212 is engaged with the driving device 23. Since the bottom of the second barrel is provided with the extension portion 212, the height of the second lens assembly 21 combined with the driving device 23 is increased, and the combination strength of the second lens assembly 21 and the driving device 23 is improved. Correspondingly, one end of the first lens assembly 19, which is far away from the circuit board 11, protrudes into the space surrounded by the extension 212 of the second lens assembly 21, and a relief portion is formed corresponding to the position of the extension 212.

Referring to fig. 4, the outer sidewall of the second lens assembly 21 is formed with a first groove 214, the inner sidewall of the driving device 23 is formed with a second groove 232, and the portion of the second lens assembly 21 formed with the first groove 214 corresponds to the portion of the driving device 23 formed with the second groove 232. Due to the arrangement of the first groove 214 and the second groove 232, when the second lens assembly 21 is connected to the driving device 23 by glue, the glue flows into the first groove 214 and the second groove 232, and the solidified glue is toothed, so that the bonding strength between the second lens assembly 21 and the driving device 23 can be improved. Specifically, the first groove 214 is opened on the second barrel.

Specifically, the first groove 214 is recessed inward along the outer peripheral surface of the second lens assembly 21 in an annular shape, and the second groove 232 is recessed inward in an annular shape from the inner side wall surface of the driving device 23 in the circumferential direction. The width of the first groove 214 is larger than that of the second groove 232 along the direction of the optical axis of the second lens assembly 21, and/or the first groove 214 and the second groove 232 are staggered.

In one embodiment, the first groove 214 may also be formed on the outer peripheral surface of the extension 212 of the second lens assembly 21.

The outer side wall of the second lens assembly 21 is further provided with a notch 216. At the location of the cut-out 216, the gap between the outer sidewall of the second lens assembly 21 and the inner sidewall of the drive device 23 increases, facilitating the glue to flow down, thereby substantially filling the gap between the second lens assembly 21 and the drive device 23. Specifically, the second lens assembly 21 has a plurality of notches 216 disposed at intervals. Specifically, the notch 216 is opened at a position where the second lens assembly 21 is opened with the first groove 214, and the notch 216 communicates the first groove 214 and the second groove 232 and forms an opening shape toward a side away from the circuit board 11. More specifically, the plurality of cutouts 216 are evenly provided on the second lens assembly 21 in the circumferential direction.

The outer side wall of the second lens assembly 21 is provided with a gate 218, and the gate 218 and the notch 216 are arranged in a staggered manner in the circumferential direction of the second lens assembly 21.

In this embodiment, the driving device 23 may be a voice coil motor. Of course, the driving device 23 can also be a driving device made of memory alloy, as long as it can move the second lens assembly 21 up and down for zooming. Specifically, voice coil motor includes casing, magnet, carrier and coil, and on the casing was located to the magnet, the coil was located on the carrier, and second camera lens subassembly 21 was fixed in on the carrier, through to the coil circular telegram, under the effect of magnet, can produce magnetic force and promote the relative casing rectilinear movement of carrier, realizes the focusing to second camera lens subassembly 21. Specifically, the housing is fixed to the base 15. The second recess 232 opens onto the carrier.

In this embodiment, the light guide 25 is disposed outside the second lens assembly 21, and the light guide 25 is annular and surrounds the entire outside of the second lens assembly 21. The light guide piece 25 guides light rays to the optical axis of the second lens assembly 21, so that light can be supplemented to the camera module, and the imaging effect of the camera module is improved; in addition, the light guide member 25 annularly surrounds the second lens assembly 21, so that the uniformity of light supplement is good, and the imaging effect of the camera module is further improved. Specifically, the light guide 25 is fixed outside the driving device 23 and partially exposed at the top of the driving device 23, and the second lens assembly 21 is partially exposed at the top of the driving device 23.

The light guide 25 includes an upper portion 250 and a lower portion 251, a step surface 253 is formed at a junction of the upper portion 250 and the lower portion 251, and the step surface 253 is closely attached to the top surface of the driving device 23. Specifically, the upper portion 250 is located above the driving device 23, and the lower portion 251 is located outside the driving device 23. Because step surface 253 closely laminates with drive arrangement 23's top surface, consequently steerable whole camera module's height is favorable to the frivolous, the miniaturization of camera module.

The top inner side of the light guide 25 is provided with an inclined side surface 252, and the side surface 252 faces the light-emitting side of the second lens assembly 21. The angled side surfaces 252 may better direct light rays toward the optical axis of the second lens assembly 21. Specifically, in the present embodiment, the side surface 252 is a conical surface.

The top of the light guide 25, remote from the circuit board 11, is provided with a top surface 254. The light guide 25 also includes a protrusion 256 that protrudes out of the top surface 254 to form a receiving groove at the top of the light guide 25. The top of the second lens assembly 21 is closer to the circuit board 11 than the top surface 254, that is, the second lens assembly 21 is not higher than the top surface 254 of the light guide 25. Specifically, the top surface 254 is perpendicular to the optical axis of the lens assembly. In other embodiments, the protrusion 256 may be disposed on the housing of the electronic product; alternatively, the protrusion 256 may be provided separately. Specifically, the boss 256 may be a fixing ring to mount the cover plate 29.

In this embodiment, the light source assembly 27 is disposed at the bottom of the light guide 25. Like this, the light of light source subassembly 27 can get into leaded light spare 25 better, realizes better light supplementation effect to improve the formation of image effect of camera module. Specifically, the light source assembly 27 includes a plurality of light sources 272 and a bottom plate 274, the plurality of light sources 272 are circumferentially disposed at the bottom of the light guide 25, the plurality of light sources 272 are fixed on the bottom plate 274, and the bottom plate 274 is fixed relative to the base 15. More specifically, the plurality of light sources 272 are uniformly provided in the bottom of the light guide 25 in the circumferential direction. The light source 272 is located outside the driving device 23 and the base 15. Specifically, the light source 272 may be an LED or other types of light sources, the bottom plate 274 is a circuit board, and the light source 272 is electrically connected to the bottom plate 274 and supplies power and controls on and off through the bottom plate 274.

In this embodiment, the cover plate 29 covers the top of the light guide 25 and is located on a side of the second lens assembly 21 away from the light sensing element 13 to protect the first lens assembly 19 and the second lens assembly 21 and prevent the lens assemblies from being contaminated or damaged. Specifically, the cover plate 29 is closely attached to the top surface 254 of the light guide 25 and is received in the receiving groove. First, since the cover plate 29 for protecting the first lens assembly 19 and the second lens assembly 21 can be pre-installed on the camera module as a part of the camera module, the distance between the cover plate 29 and the first lens assembly 19 and the second lens assembly 21 in this embodiment can be controlled during the manufacture of the camera module, compared to the case where the camera module is installed on a mobile phone or the like during the assembly of the camera module. The cover plate 29 is tightly attached to the top surface 254, so that the gap h between the top of the second lens assembly 21 and the cover plate 29 is small enough, the height of the whole camera module is reduced, and the camera module is light, thin and small. Specifically, the cover plate 29 is a glass cover plate.

It can be understood that the light guide 25 can be applied to only one lens assembly or a camera module with three or more lens assemblies, except for the camera module with two lens assemblies applied to the embodiment, and the light guide 25 can play a role of light supplement without limitation. The first lens assembly 19 and the second lens assembly 21 may also be both fixed focus lenses or both zoom lenses. For example, when the second lens assembly 21 is a fixed focus lens, the driving device 23 can be replaced by the base 15, that is, the second lens assembly 21 is also mounted on the base 15, and then the light guide 25 is fixed outside the base 15 and partially exposed on the top of the base 15, and the step surface 253 of the light guide 25 is closely attached to the top surface of the base 15. That is, the light guide 25 may be mounted on a mount such as a drive device or a chassis so as to correspond to the lens unit.

The utility model also provides a camera module manufacturing method for make above-mentioned camera module. Referring to fig. 5, the method for manufacturing the camera module includes the following steps:

and S11, providing the circuit board 11 and the photosensitive element 13, arranging the photosensitive element 13 on the circuit board 11, and electrically connecting the photosensitive element 13 to the circuit board 11 to transmit the electric signal to the circuit board 11. Specifically, the wiring board 11 may be a flexible circuit board. The photosensitive element 13 may be a photosensitive chip, such as a CCD (Charge Coupled Device) photosensitive chip or a CMOS (Complementary Metal Oxide Semiconductor) photosensitive chip. When the photosensitive element 13 is electrically connected to the circuit board 11, the bonding can be performed by gold wire bonding. When the circuit board 11 is provided, a circuit substrate is formed by SMT (surface mount technology) mounting technology, and then the circuit substrate is cut and typeset to form the circuit board 11.

S13, providing the base 15 and the filter 17, disposing the filter 17 on the base 15, disposing the base 15 on the circuit board 11, and mounting the first lens assembly 19 on the base 15. Specifically, a fixing stage 154 protruding inward is formed on the inner wall of the base 15, and the filter 17 is disposed on the fixing stage 154, such that the filter 17 is located on the side of the photosensitive element 13 away from the circuit board 11. The first lens assembly 19 may be a fixed focus lens. The first lens assembly 19 can be screwed into the fixing base 15 and fixed by dispensing. In step S13, the mounted component is also baked to quickly cure the glue.

S15, the first lens assembly 19 is debugged. Specifically, the first lens assembly 19 is focused. Step S15 also includes cleaning the assembled components.

S17, providing the second lens assembly 21 and the driving device 23, and mounting the second lens assembly 21 on the driving device 23. Specifically, the second lens assembly 21 may be a zoom lens. Specifically, the second lens assembly 21 is fixed to the driving device 23 by glue. The driving device 23 may be a voice coil motor, and specifically, the voice coil motor includes a housing, a magnet, a carrier, and a coil, the magnet is disposed on the housing, the coil is disposed on the carrier, and the second lens assembly 21 is fixed on the carrier. In step S17, the method further includes cleaning the driving device 23 before mounting the second lens assembly 21 on the driving device 23, baking the assembled driving device 23 and the second lens assembly 21 after mounting the second lens assembly 21 on the driving device 23, and cleaning the second lens assembly 23 after baking.

Specifically, the outer side wall of the second lens assembly 21 is provided with a first groove 214, the inner side wall of the driving device 23 is provided with a second groove 232, and the portion of the second lens assembly 21 provided with the first groove 214 corresponds to the portion of the driving device 23 provided with the second groove 232. The outer side wall of the second lens assembly 21 is further provided with a notch 216. The second lens assembly 21 has a plurality of notches 216 disposed at intervals, and more specifically, the plurality of notches 216 are uniformly disposed on the second lens assembly 21 along the circumferential direction. The notch 216 is formed at a position of the second lens module 21 where the first groove 214 is formed. In step S17, glue is injected from the cut 216 and flows into the first groove 214 and the second groove 232, so as to sufficiently fill the gap between the second lens assembly 21 and the driving device 23.

S19, the driving device 23 with the second lens assembly 21 is mounted on the base 15. Specifically, the driving device 23 is provided on a side of the base 15 away from the wiring board 11. In step S19, baking is performed after the driving device 23 is mounted on the base 15 to dry the glue.

S21, performing a function test on the first lens assembly 19 and the second lens assembly 21. Specifically, the focal lengths of the first lens assembly 19 and the second lens assembly 21 are tested to determine whether they meet requirements.

S23, providing the light guide 25 and the light source module 27, and installing the light guide 25 on the outer side of the second lens module 21. Specifically, the light guide 25 is ring-shaped, surrounds the entire outside of the second lens assembly 21, and the light source assembly 27 is disposed at the bottom of the light guide 25.

Specifically, the light guide 25 includes an upper portion 250 and a lower portion 251, a step surface 253 is formed at a junction of the upper portion 250 and the lower portion 251, and the step surface 253 is closely attached to the top surface of the driving device 23. Specifically, the upper portion 250 is located above the driving device 23, and the lower portion 251 is located outside the driving device 23.

S25, providing a cover plate 29, and covering the cover plate 29 on the top of the light guide 25 and on the side of the second lens assembly 21 away from the light sensing element 13, thereby assembling the camera module. Specifically, the cover plate 29 is closely attached to the top surface 254 of the light guide 25. Specifically, the cover plate 29 is a glass cover plate.

And S27, performing function test on the camera module. Specifically, the camera module after the light guide 25 is assembled is tested to test the performance of the light guide 25. In step S27, the method further includes performing appearance inspection and packaging and warehousing on the camera module.

The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the above preferred embodiments, but the present invention is not limited to the above embodiments, and any skilled person in the art can make some changes or modifications to equivalent embodiments without departing from the technical scope of the present invention, but all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the technical scope of the present invention.

Claims

1. The camera module comprises a circuit board (11) and a photosensitive element (13), and is characterized by further comprising a base (15), a first lens assembly (19), a second lens assembly (21) and a driving device (23), wherein the photosensitive element (13) and the base (15) are arranged on the circuit board (11), the photosensitive element (13) is electrically connected with the circuit board (11), the driving device (23) is arranged on the base (15), the first lens assembly (19) is arranged on the base (15), and the second lens assembly (21) is arranged on the driving device (23);

the outer side wall of the second lens assembly (21) is provided with a first groove (214), and the inner side wall of the driving device (23) is provided with a second groove (232).

2. The camera module according to claim 1, wherein the second lens assembly (21) is provided with the first recess (214) at a position corresponding to a position of the driving device (23) provided with the second recess (232).

3. The camera module according to claim 1, wherein a notch (216) is further formed on an outer side wall of the second lens assembly (21), the notch (216) is formed at a position where the first groove (214) is formed in the second lens assembly (21), and the notch (216) communicates the first groove (214) and the second groove (232) and is open towards a side away from the circuit board (11).

4. The camera module of claim 3, wherein a plurality of the cutouts (216) are uniformly arranged on the second lens assembly (21) along the circumferential direction.

5. The camera module according to claim 1, wherein the second lens assembly (21) comprises a second lens group and a second lens barrel, the second lens group is assembled in the second lens barrel, and the first groove (214) is opened on the second lens barrel; drive arrangement (23) can be voice coil motor, voice coil motor includes casing, magnet, carrier and coil, the magnet is located on the casing, the coil is located on the carrier, second camera lens subassembly (21) are fixed in on the carrier, second recess (232) are seted up in on the carrier.

6. The camera module according to claim 5, wherein an extension portion (212) protrudes downward from a bottom edge of the second barrel, and the extension portion (212) is engaged with the driving device (23).

7. The camera module according to claim 6, wherein an end of the first lens assembly (19) away from the circuit board (11) protrudes into a space defined by the extension (212) of the second lens assembly (21), and a relief portion is formed corresponding to a position of the extension (212).

8. The camera module according to claim 6, wherein the first groove (214) is formed on an outer circumferential surface of the extension portion (212).

9. The camera module of claim 1, further comprising a light guide (25) and a light source assembly (27), wherein the light guide (25) is disposed outside the second lens assembly (21), and the light source assembly (27) is disposed at a bottom of the light guide (25).

10. The camera module according to claim 9, wherein the light guide (25) is ring-shaped and surrounds the entire outside of the second lens assembly (21); or, the light guide member (25) comprises an upper part (250) and a lower part (251), a step surface (253) is formed at the joint of the upper part (250) and the lower part (251), and the step surface (253) is tightly attached to the top surface of the driving device (23).

11. The camera module according to claim 9, wherein the light source assembly (27) comprises a plurality of light sources (272) and a base plate (274), the plurality of light sources (272) are circumferentially disposed at the bottom of the light guide (25), the plurality of light sources (272) are fixed on the base plate (274), and the base plate (274) is fixed relative to the base (15).

12. The camera module according to claim 9, further comprising a cover plate (29), wherein the cover plate (29) is disposed on the top of the light guide (25) and located on a side of the second lens assembly (21) away from the photosensitive element (13); the camera module further comprises an optical filter (17), a fixed platform (154) which is arranged in an inward protruding mode is formed on the inner wall of the base (15), the optical filter (17) is fixed on the fixed platform (154), and the optical filter (17) is located between the photosensitive element (13) and the first lens assembly (19) and the second lens assembly (21).

13. The camera module according to claim 1, wherein the first groove (214) is recessed inwardly along an outer circumferential surface of the second lens assembly (21) in a ring shape, and the second groove (232) is recessed inwardly in a ring shape from an inner side wall surface of the driving device (23) in a circumferential direction.

14. The camera module according to claim 1, wherein the width of the first groove (214) is larger than the width of the second groove (232) along the direction of the optical axis of the second lens assembly (21), and/or the first groove (214) and the second groove (232) are staggered.