WO2020258340A1

WO2020258340A1 - Lens module and electronic device

Info

Publication number: WO2020258340A1
Application number: PCT/CN2019/093931
Authority: WO
Inventors: 韦传冬
Original assignee: 常州市瑞泰光电有限公司
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-30
Also published as: CN210109447U

Abstract

A lens module (10) and an electronic device (1). The lens module (10) comprises a lens barrel (100), a lens group (200), and a pressing ring (300). The lens barrel (100) is provided with a cavity (110); both the lens group (200) and the pressing ring (300) are located in the cavity (110); and the pressing ring (300) is connected to the lens barrel (100). The pressing ring (300) comprises a body (310) and protrusions (320). The body (310) comprises an object side surface (311); the object side surface (311) comprises an abutting surface (3111) and a non-abutting surface (3112); the abutting surface (3111) is far away from an optical axis (400) with respect to the non-abutting surface (3112); the abutting surface (3111) abuts against the lens group (200); and the non-abutting surface (3112) is provided with protrusions (320), and the protrusions (320) are round protrusions (320). The provision of the protrusions (320) can reduce the stray light exiting from the lens barrel (100) because multiple reflections by the surface of the protrusions (320) would cause energy loss to the light irradiated on the pressing ring (300), so that the imaging quality of the lens module (10) and the electronic device (1) using the lens module (10) is improved.

Description

Lens module and electronic equipment

Technical field

This application relates to the field of optical imaging technology, and specifically refers to a lens module and electronic equipment.

Background technique

With the continuous development of technology, portable electronic devices continue to develop in the direction of intelligence and miniaturization. In addition to digital cameras, portable electronic devices, such as tablet computers and mobile phones, are also equipped with lens modules with shooting functions.

technical problem

Existing lens modules generally include a lens barrel, a lens group arranged in the lens barrel, and a pressing ring for fixing the lens group in the lens barrel. Light can enter the lens barrel from the object side of the lens module. And shoot out from the lens barrel through the lens group. During the imaging process, a part of the light emitted by the lens group illuminates the pressure ring, and is reflected by the pressure ring and then emitted from the lens barrel to form stray light, which affects the imaging quality of the lens module.

Therefore, it is necessary to provide a lens module and electronic equipment.

Technical solutions

The purpose of the present application is to provide a lens module and electronic equipment, aiming to reduce the stray light of the lens module, so as to improve the imaging quality of the lens module and the electronic device using the lens module.

The technical solution of this application is as follows:

A lens module is provided, which includes a lens barrel, a lens group, and a pressure ring, the lens barrel is provided with a cavity, the lens group and the pressure ring are both located in the cavity, and the pressure ring and the pressure ring The lens barrel is connected, the pressing ring includes a body and a protrusion, the body includes a side surface, the side surface includes a bearing surface and a non-bearing surface, and the bearing surface is far away from the light relative to the non-bearing surface. Shaft, the bearing surface abuts against the lens group, the non-bearing surface is provided with the protrusion, and the protrusion is an annular protrusion.

Optionally, there are a plurality of said protrusions, a plurality of said protrusions are arranged coaxially, and a groove is formed between two adjacent protrusions.

Optionally, the non-bearing surface is perpendicular to the optical axis.

Optionally, the height of the protrusion along a direction parallel to the optical axis is 10-30 μm.

Optionally, the protrusion includes a first surface and a second surface disposed oppositely, and an included angle between the first surface and the second surface is 0-90°.

Optionally, the width of the end of the protrusion connected with the non-bearing surface along the radial direction of the lens module is 20-40 μm.

Optionally, the size of the opening of the groove along the radial direction of the lens module is 20-100 μm.

Optionally, the protrusion includes a first surface, a top surface, and a second surface, the first surface and the second surface are disposed opposite to each other, and the top surface connects the first surface and the second surface , And the top surface is a curved surface.

Application

Optionally, the protrusion and the lens group are spaced apart.

In addition, the present application also provides an electronic device including the above-mentioned lens module.

Beneficial effect

The beneficial effect of the present application is that the pressure ring of the above lens module includes a body and a protrusion, the object side of the body includes a supporting surface and a non-supporting surface, and the non-supporting surface is provided with a protrusion. By providing protrusions, the light irradiated on the pressure ring will lose energy after being reflected multiple times by the convex surface, so as to reduce the stray light emitted from the lens barrel, thereby improving the performance of the lens module and the electronic equipment using the lens module. Image quality.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of an electronic device in an embodiment of the application;

FIG. 2 is a cross-sectional view of the lens module in FIG. 1;

Figure 3 is a partial enlarged view of Ⅰ in Figure 2

Figure 4 is a cross-sectional view of the pressure ring in Figure 2;

Figure 5 is a partial enlarged view at Ⅱ in Figure 4;

Fig. 6 is a partial enlarged view of Ⅱ in Fig. 4 in another embodiment;

FIG. 7 is a cross-sectional view of a lens module in another embodiment of the application;

Figure 8 is a partial enlarged view at Ⅲ in Figure 7;

FIG. 9 is a schematic diagram of the structure of the pressure ring in FIG. 7.

The reference signs in the specification are as follows:

1. Electronic equipment; 10. Lens module; 100, lens barrel; 110, cavity; 120, light entrance; 200, lens group; 300, pressure ring; 310, body; 311, side of object; 3111, bearing Surface; 3112, non-supporting surface; 320, protrusion; 321, first surface; 322, second surface; 323, top surface; 330, groove; 400, optical axis.

Embodiments of the invention

The application will be further described below in conjunction with the drawings and implementations.

As shown in FIG. 1, an embodiment of the present application provides an electronic device 1 with a lens module 10. The electronic device 1 may be a mobile phone, a tablet computer, or a notebook.

As shown in FIG. 2, the lens module 10 includes a lens barrel 100, a lens group 200 and a pressure ring 300. The lens barrel 100 is provided with a cavity 110, and the lens group 200 and the pressing ring 300 are both located in the cavity 110. The pressing ring 300 is connected to the lens barrel 100, and the pressing ring 300 abuts against the lens group 200, thereby confining the lens group 200 in the cavity 110. Moreover, the lens barrel 100 is also provided with a light entrance hole 120 communicating with the cavity 110 for light to enter the cavity 110 from the object side of the lens module 10.

As shown in Figures 3 and 4, the pressure ring 300 includes a body 310 and a protrusion 320. The body 310 includes an object side surface 311. The object side surface 311 includes a bearing surface 3111 and a non-bearing surface 3112. The bearing surface 3111 is relatively non-bearing The supporting surface 3112 is far away from the optical axis 400. The supporting surface 3111 abuts against the lens group 200, the non-supporting surface 3112 is provided with a protrusion 320, and the protrusion 320 is an annular protrusion 320.

It should be noted that, in this embodiment, the body 310 and the protrusion 320 are integrally connected. For ease of understanding, the non-supporting surface 3112 is indicated by a dotted line in the figure. In other embodiments, the body 310 and the protrusion 320 can also be manufactured separately and then assembled into the pressing ring 300.

During the imaging process, a part of the light emitted by the lens assembly 200 irradiates the pressure ring 300 and is reflected multiple times by the surface of the protrusion 320. After multiple reflections, the light will lose energy to reduce the stray light emitted from the lens barrel 100, thereby improving the imaging quality of the lens module 10 and the electronic device 1 using the lens module 10.

In this embodiment, there are a plurality of protrusions 320, the plurality of protrusions 320 are arranged coaxially, a groove 330 is formed between two adjacent protrusions 320, and the groove 330 is an annular groove. By providing a plurality of protrusions 320, when light is emitted from the lens assembly 200 at multiple angles, it can all be irradiated onto the protrusions 320, so as to minimize the stray light emitted from the lens barrel 100.

As shown in FIG. 5, the cross-sectional shape of the protrusion 320 is approximately triangular, and the cross-sectional shape of the groove 330 formed between two adjacent protrusions 320 is also approximately triangular. It is understandable that, as shown in FIG. 5, in the actual processing process, due to the size of the protrusion 320 itself, and the distance between two adjacent protrusions 320, the two adjacent protrusions 320 and There may be a gap between the connected ends of the non-supporting surface 3112, so that the shape of the groove 330 is roughly trapezoidal. Of course, in other embodiments, the cross-sectional shape of the groove 330 formed between two adjacent protrusions 320 may also be an arc or other shapes.

In this embodiment, the pressing ring 300 has a circular ring shape, and the non-bearing surface 3112 is perpendicular to the optical axis 400. A plurality of protrusions 320 are arranged at intervals along the radial direction of the pressing ring 300, and each protrusion 320 includes oppositely arranged protrusions. The first surface 321 and the second surface 322. As shown in FIGS. 5 and 6, the height A of the protrusion 320 along the direction parallel to the optical axis 400 is 10-30 μm, the angle B between the first surface 321 and the second surface 322 is 0-90°, and the protrusion 320 is The width C of the connecting end of the non-bearing surface 3112 along the radial direction of the pressure ring 300 is 20-40 μm, and the dimension D of the opening of the groove 330 along the radial direction of the pressure ring 300 is 20-100 μm.

In this way, when light is emitted from the lens assembly 200 at multiple angles, it can all be irradiated onto the protrusion 320, so as to minimize the stray light emitted from the lens barrel 100 and facilitate processing. Moreover, due to the size limitation of the lens module 10 and the lens barrel 100, the area of the non-supporting surface 3112 is limited. Limiting the sizes of the protrusions 320 within the above range makes it possible to accommodate as many protrusions as possible in the limited space. 320, and enable each protrusion 320 to receive light from multiple angles as much as possible, so as to minimize the stray light emitted from the lens barrel 100.

It is worth mentioning that in this embodiment, the non-supporting surface 3112 is perpendicular to the optical axis 400, and in other embodiments, the included angle between the non-supporting surface 3112 and the optical axis 400 may also be less than 90°.

As shown in FIGS. 5 and 6, the protrusion 320 further includes a top surface 323, which connects the first surface 321 and the second surface 322, and the top surface 323 is a curved surface. After the light hits the arc-shaped top surface 323, it is reflected and diffused by the arc-shaped top surface 323, which can avoid the concentration of light and lose energy after being reflected multiple times by the surface of the protrusion 320 to further reduce the emission from the lens barrel 100 Stray light.

In this embodiment, as shown in FIG. 2, when the pressing ring 300 and the lens group 200 are installed in the lens barrel 100, the protrusion 320 is spaced from the lens group 200, and the lens group 200 only abuts against the bearing surface 3111. In this way, it is only necessary to ensure the processing accuracy of the bearing surface 3111 and the installation position of the pressure ring 300 to ensure the position accuracy of the lens group 200. Of course, in other embodiments, the protrusion 320 may also abut the lens group 200.

It should be noted that in other embodiments, as shown in FIGS. 7 to 9, the pressing ring 300 may also include only one protrusion 320, and a groove 330 is formed between the protrusion 320 and the body 310. When light is irradiated on the main body 310, the light is reflected on the surface of the protrusion 320 and the inner wall of the groove 330 and loses energy, thereby reducing the stray light emitted from the lens barrel 100. Moreover, the size of the protrusion 320 can also be set for the light irradiated to the pressure ring 300 within a specific angle range to reduce stray light within the specific angle range.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these all belong to this application. The scope of protection.

Claims

A lens module, characterized in that it comprises a lens barrel, a lens group and a pressure ring, the lens barrel is provided with a cavity, the lens group and the pressure ring are both located in the cavity, and the pressure ring Connected to the lens barrel, the pressure ring includes a body and a protrusion, the body includes a side surface, the side surface includes a bearing surface and a non-bearing surface, and the bearing surface is opposite to the non-bearing surface The surface is far away from the optical axis, the bearing surface abuts against the lens group, the non-bearing surface is provided with the protrusion, and the protrusion is an annular protrusion.
The lens module according to claim 1, wherein there are a plurality of the protrusions, and the plurality of protrusions are arranged coaxially, and a groove is formed between two adjacent protrusions.
3. The lens module of claim 2, wherein the non-supporting surface is perpendicular to the optical axis.
The lens module of claim 3, wherein the height of the protrusion along a direction parallel to the optical axis is 10-30 μm.
4. The lens module of claim 3, wherein the protrusion comprises a first surface and a second surface that are oppositely disposed, and an included angle between the first surface and the second surface is 0-90.
The lens module according to claim 3, wherein the width of the end of the protrusion connected to the non-supporting surface along the radial direction of the lens module is 20-40 μm.
The lens module according to claim 3, wherein the size of the opening of the groove along the radial direction of the lens module is 20-100 μm.
The lens module according to claim 2, wherein the protrusion comprises a first surface, a top surface, and a second surface, the first surface and the second surface are disposed oppositely, and the top surface is connected The first surface and the second surface, and the top surface is a curved surface.
The lens module according to claim 1, wherein the protrusion and the lens group are spaced apart.
An electronic device, characterized by comprising the lens module according to any one of claims 1-9.