阅读说明：本技术 镜筒、相机模组、电子装置及镜筒制造方法 (Lens barrel, camera module, electronic device and lens barrel manufacturing method ) 是由 冯雅兰 柯骏程 于 2019-03-29 设计创作，主要内容包括：本发明提出一种镜筒,所述镜筒设有容纳腔及透光孔,所述容纳腔用于收容镜片,所述镜筒在所述透光孔的孔壁上设有环状的凸出部,所述凸出部的内侧面为粗糙表面。本发明的镜筒能够提高成像质量。本发明还提出一种相机模组。本发明还提出一种电子装置,所述电子装置包括如上所述的相机模组。本发明还提出一种上述镜筒制造方法。(The invention provides a lens barrel which is provided with an accommodating cavity and a light transmission hole, wherein the accommodating cavity is used for accommodating lenses, an annular protruding part is arranged on the wall of the light transmission hole of the lens barrel, and the inner side surface of the protruding part is a rough surface. The lens barrel can improve the imaging quality. The invention also provides a camera module. The invention further provides an electronic device, which comprises the camera module. The invention also provides a manufacturing method of the lens barrel.)

1. The utility model provides a lens cone, the lens cone is equipped with and holds chamber and light trap, it is used for acceping the lens to hold the chamber, its characterized in that: the lens cone is provided with an annular protruding part on the hole wall of the light hole, and the inner side surface of the protruding part facing the accommodating cavity is a rough surface.

2. The lens barrel according to claim 1, wherein: the wall of the accommodating cavity is a rough surface.

3. The lens barrel according to claim 1, wherein: the surface roughness of the inner side surface of the convex part is more than 6 microns.

4. The utility model provides a camera module, camera module includes lens cone and lens, its characterized in that: the lens barrel according to any one of claims 1 to 3.

5. The camera module of claim 4, wherein: the camera module further comprises a plurality of light shielding sheets, and the light shielding sheets are respectively clamped between two adjacent lenses.

6. An electronic device, characterized in that: the electronic device comprises a camera module according to claim 4 or 5.

7. A lens barrel manufacturing method, comprising:

the lens barrel is formed by injection molding, and is provided with an accommodating cavity and a light hole, and the wall of the light hole of the lens barrel is provided with an annular protruding part; and

and the sand blasting forms a rough surface on the inner side surface of the convex part facing the accommodating cavity.

8. The lens barrel manufacturing method according to claim 7, wherein: in the step of forming the inner side surfaces of the projections into rough surfaces by sandblasting, at least two kinds of particles of different sizes are mixed to be sandblasted.

9. The lens barrel manufacturing method according to claim 7, wherein: in the step of forming the inner side surfaces of the protrusions into rough surfaces by sand blasting, sand blasting is performed using particles mixed with 180 mesh and 100 mesh.

10. The lens barrel manufacturing method according to claim 7, wherein: in the step of forming the inner side surface of the projecting portion into a rough surface by sandblasting, the wall of the accommodating chamber is sandblasted at the same time.

Technical Field

The invention relates to a lens barrel, a camera module, an electronic device and a lens barrel manufacturing method.

Background

With the continuous development of science and technology, electronic products are widely used, and the camera module is used as an important component of the electronic products, and the use frequency of the camera module is increasing, so that higher requirements are provided for the quality of the camera module. However, when the camera module shoots under strong light, light rays with specific angles can be incident to the inner wall of the lens barrel and then incident to the image sensor after being reflected and refracted for multiple times by the lens barrel, and further glare is formed on the image sensor, so that the imaging quality is influenced.

Disclosure of Invention

In view of the above, it is desirable to provide a lens barrel, a camera module, an electronic device and a method for manufacturing the lens barrel.

A lens cone is provided with a containing cavity and a light hole, wherein the containing cavity is used for containing a lens, an annular protruding part is arranged on the hole wall of the light hole of the lens cone, and the inner side surface of the protruding part is a rough surface.

A camera module comprises a lens barrel and a lens, wherein the lens barrel is the lens barrel.

An electronic device comprises the camera module.

A lens barrel manufacturing method, comprising: the lens barrel is formed by injection molding, and is provided with an accommodating cavity and a light hole, and the wall of the light hole of the lens barrel is provided with an annular protruding part; and sandblasting to form a rough surface on the inner side surface of the convex part.

The inner side surface is sandblasted to form a rough surface, so that light irradiated on the inner side surface is scattered, glare is reduced, and imaging quality is improved.

Drawings

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

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

Fig. 3 is a sectional view of the camera module shown in fig. 1 taken along the line III-III.

Fig. 4 is a flowchart of a lens barrel manufacturing method according to an embodiment of the present invention.

Fig. 5A is a scanning electron micrograph of the inside surface after sandblasting using 100-mesh particles.

Fig. 5B is a photograph of the inner side surface after sandblasting using 100 mesh particles, actually taken after being applied to a camera module.

Fig. 6A is a scanning electron micrograph of the inside surface after sandblasting using 180 mesh particles.

Fig. 6B is a photograph of the inner side of a 180 mesh grit blasted camera module actually taken after application to a camera module.

Fig. 7A is a scanning electron micrograph of the inside surface after sandblasting using 100 mesh and 180 mesh mixed particles.

Fig. 7B is a photograph actually taken after the inner side surface after sand blasting using the particles mixed with 100 mesh and 180 mesh was applied to the camera module.

Description of the main elements

Camera module 100

Lens barrel 10

Accommodating chamber 101

Light hole 103

Projection 11

Medial side 110

Lens 21

First lens 211

Second lens 212

Third lens 213

Fourth lens 214

Light shielding sheet 22

Spacer ring 23

Clamping ring 24

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, an embodiment of the invention provides an electronic device. The electronic device includes a camera module 100. In this embodiment, the electronic device is a mobile phone, but is not limited thereto, and in other embodiments, the electronic device may also be a tablet computer, a notebook computer, and the like.

Referring to fig. 2 and 3, the camera module 100 includes a lens barrel 10, and a plurality of lenses 21, a light shielding sheet (soma)22, a spacer (spacer)23, a pressure ring (retainer)24, a filter 25 and an image sensor 26 disposed in the lens barrel 10.

The lens barrel 10 is provided with an accommodating cavity 101 and a light hole 103. The accommodating chamber 101 is used for accommodating a plurality of elements such as the lens 21, the light shielding sheet 22, the spacer 23, the filter 25, the image sensor 26 and the like. The light transmission hole 103 is located at the top of the lens barrel 10 and communicates with the accommodating chamber 101.

Referring to fig. 7A, the lens barrel 10 is provided with a ring-shaped protrusion 11 on a wall of the hole adjacent to the light hole 103 for blocking light. The inner side 110 of the protruding part 11 facing the accommodating cavity is a rough surface. The inner side surface 110 is a side facing the plurality of lenses 21. The inner side 110 is an irradiation point of the incident light reflected by the first lens. The inner side 110 is a rough surface capable of scattering light, thereby reducing glare and improving image quality.

In this embodiment, the surface roughness Ra of the inner side surface 110 is 6.963 micrometers.

It is understood that in other embodiments, the surface roughness Ra of the inner side surface 110 may be greater than 6 microns.

It is understood that, in other embodiments, the wall of the accommodating chamber 101 may also be a rough surface.

The plurality of lenses 21 include a first lens 211, a second lens 212, a third lens 213 and a fourth lens 214 sequentially stacked from an object side to an image side of the camera module 100. The plurality of light shielding sheets 22 are respectively interposed between two adjacent lenses 21.

It is understood that in other embodiments, the number of the plurality of lenses 21 is not limited to four.

The spacer 23 is disposed at two ends of the edge portion supporting the third lens 213 and the fourth lens 214, respectively, for maintaining a predetermined interval between the third lens 213 and the fourth lens 214.

The press ring 24 is attached to an end of the fourth lens 214 facing the image side and is used for supporting and fixing the plurality of lenses 21 and blocking light.

Please refer to fig. 7B, fig. 7B is a photograph actually taken by the camera module. It can be seen that the camera module 100 of the electronic device can effectively scatter light by setting the inner side 110 as a rough surface to reduce the glare phenomenon.

Referring to fig. 4, an embodiment of the present invention provides a method for manufacturing a lens barrel, including the following steps:

s201: a lens barrel 10 is formed through injection molding, the lens barrel 10 is provided with an accommodating cavity 101 and a light hole 103, and an annular protruding part 11 is arranged on the wall of the lens barrel 10, which is close to the light hole 103, so as to shield light.

S202: the inner side 110 of the projection 11 facing the receiving chamber is roughened by sandblasting.

The thicker surface can increase the reflection range of light, thereby reducing stray light entering the image sensor. Thus, larger diameter grit particles are required for blasting. However, when the diameter of the particles is too large, the density of the particles is low, so that the surface to be blasted has a flat surface that is not blasted. In particular, the area of the inner side surface 110 of the projection 11 is small, and the region is likely to be leaked through in the blasting.

Referring to fig. 5A to 7B, in the present embodiment, the length of the inner side surface 110 parallel to the optical axis is 0.16 mm. When the sand blasting is performed using 180 mesh particles, the surface roughness of the inner side 110 is low and the glare phenomenon still occurs. When blasting with 100 mesh particles, there are areas of the inner side 110 that are not covered by the particles. In the embodiment, the 180-mesh particles and the 100-mesh particles are mixed and then subjected to sand blasting to achieve high surface roughness and high sand blasting density, so that a good light scattering effect is achieved.

Referring to fig. 5A, 6A and 7A, the surface roughness Ra of the inner side 110 after sandblasting using 180 mesh particles was 2.526 μm; the surface roughness Ra of the inside 110 after blasting with 100 mesh particles was 4.782 microns; the surface roughness Ra of the inside 110 after sandblasting using 180 mesh and 100 mesh mixed particles was 6.963 microns.

Referring to fig. 5B, fig. 6B and fig. 7B, the actual taken picture of fig. 7B after the inner side surface of the camera module 100 is sandblasted by using the particles mixed with 100 mesh and 180 mesh is better than the other two pictures. In fig. 6B, there is also a glare phenomenon in the middle of the actually photographed picture after the inner side surface subjected to sand blasting by using 180 mesh particles is applied to a camera module.

It will be appreciated that in other embodiments, the blasting may be performed with a mixture of particles of other sizes, and that a plurality of different sizes may be mixed to perform the blasting.

It is understood that in other embodiments, the walls of the containment chamber 101 may be blasted together with the blasting.

The inner side surface 110 is sandblasted to form a rough surface, so that light irradiated on the inner side surface is scattered, glare is reduced, and imaging quality is improved.

Furthermore, in the sand blasting step, at least two kinds of particles with different sizes are mixed for sand blasting, so that the surface roughness and the sand blasting density are provided simultaneously, and a better sand blasting effect is achieved.

Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.