WO2021226795A1

WO2021226795A1 - Lens barrel, camera module, and electronic device

Info

Publication number: WO2021226795A1
Application number: PCT/CN2020/089629
Authority: WO
Inventors: 胡德忠; 吴俊甫; 邹海荣
Original assignee: 南昌欧菲精密光学制品有限公司
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-11-18

Abstract

A lens barrel (100), a camera module (20), and an electronic device (30). A chamber wall (1022) of the lens barrel (100) is provided with a plurality of light extinction grooves (110). The light extinction grooves (110) are used to reduce stray light. The plurality of light extinction grooves (110) are arranged at intervals along the circumferential direction of the lens barrel (100). The groove surfaces of the light extinction groove (110) comprise a first side surface (1101), a second side surface (1102) and a bottom surface (1100), the bottom surface (1100) facing towards a central axis (1002) of the lens barrel (100), one end of the bottom surface (1100) being connected to the first side surface (1101), the other opposite end being connected to the second side surface (1102), and the bottom surface (1100) having an inclined relationship with at least one of the first side surface (1101) and the second side surface (1102).

Description

Lens tube, camera module and electronic device

Technical field

The present invention relates to the field of photography, in particular to a lens barrel, a camera module and an electronic device.

Background technique

In recent years, with the rapid development of the mobile phone industry, consumers have special requirements for the stray light generated by mobile phones and the appearance of the lens barrel. The current method is generally to reduce the lens barrel through coating, sandblasting, and electric discharge. Reflectivity to eliminate the stray light generated by reflection on the surface of the lens barrel. But among them, the lens barrel is easy to cause the coating to wear out during the transportation and assembly process; for the lens barrel that adopts the sandblasting method, it is easy to cause the sand particles to fall off after the mold is processed; and for the lens barrel with higher discharge reflectivity, the lens barrel The surface matting effect is poor. The above methods are difficult to make the lens barrel have a good ability to eliminate stray light.

Summary of the invention

According to various embodiments of the present application, a lens barrel is provided.

A lens barrel, a cavity wall of the lens barrel is provided with a plurality of extinction grooves, the extinction grooves are used to reduce stray light, and the plurality of extinction grooves are arranged at intervals along the circumferential direction of the lens barrel. The groove surface of the matting groove includes a first side surface, a second side surface and a bottom surface, the bottom surface faces the central axis of the lens barrel, one end of the bottom surface is connected to the first side surface, and the opposite end is connected to the second side surface , The bottom surface has an oblique relationship with at least one of the first side surface and the second side surface.

A camera module includes a lens, a photosensitive element and the lens barrel, the lens is arranged on the lens barrel, and the photosensitive element is arranged on the image side of the lens barrel.

An electronic device includes a fixing part and the camera module, and the camera module is arranged on the fixing part.

The details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects and advantages of the present invention will become apparent from the description, drawings and claims.

Description of the drawings

In order to better describe and illustrate the embodiments and/or examples of the inventions disclosed herein, one or more drawings may be referred to. The additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the currently described embodiments and/or examples, and the best mode of these inventions currently understood.

FIG. 1 is a schematic diagram of the lens barrel provided by the first embodiment of the application;

2 is a cross-sectional view of the lens barrel provided by the first embodiment of the application;

FIG. 3 is a schematic diagram of the lens barrel in the first embodiment of the present application under a viewing angle from the image side to the object side;

4 is a schematic diagram of the structure of the extinction groove of the lens barrel in the first embodiment;

Figure 5 is a diagram of the incident light path when the A1 value of the extinction groove is too large;

FIG. 6 is a schematic diagram of the lens barrel in the second embodiment of the present application under a viewing angle from the image side to the object side;

7 is a schematic diagram of the structure of the extinction groove of the lens barrel in the second embodiment;

8 is a schematic diagram of the structure of the extinction groove of the lens barrel in the second embodiment;

FIG. 9 is a schematic diagram of the lens barrel in the third embodiment of the present application under a viewing angle from the image side to the object side;

10 is a schematic diagram of the structure of the extinction groove of the lens barrel in the third embodiment;

11 is a schematic diagram of the lens barrel in the fourth embodiment of the present application from the image side to the object side in a viewing angle;

12 is a schematic diagram of the structure of the extinction groove of the lens barrel in the fourth embodiment;

Figure 13 is a diagram of the incident light path when the W3 value of the extinction groove is too large;

FIG. 14 is a schematic diagram of the lens barrel in the fifth embodiment of the present application under a viewing angle from the image side to the object side;

15 is a schematic diagram of the structure of the extinction groove of the lens barrel in the fifth embodiment;

16 is a schematic diagram of the structure of the extinction groove of the lens barrel in the fifth embodiment;

FIG. 17 is a schematic diagram of the lens barrel in the sixth embodiment of the present application under a viewing angle from the object side to the image side;

18 is a cross-sectional view of the lens barrel provided by the sixth embodiment;

Figure 19 is an enlarged view of area K in Figure 18;

FIG. 20 is a schematic diagram of a camera module provided by an embodiment of the application;

FIG. 21 is a schematic diagram of an electronic device provided by an embodiment of the application.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or a central element may also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time. The terms "inner", "outer", "left", "right" and similar expressions used herein are for illustrative purposes only, and do not mean that they are the only embodiments.

The current method is generally to reduce the reflectivity of the lens barrel through coating, sandblasting, and electric discharge, so that the lens barrel achieves an ultra-black effect to eliminate stray light caused by surface reflection. However, the lens barrel is easy to wear during assembly and transportation, and the color of the coating is difficult to guarantee; for the sandblasted lens barrel, it is easy to cause the sand particles to fall off after the mold is processed; and for the lens barrel with higher discharge reflectivity, the lens barrel The surface matting effect is poor. In addition, the lens barrel using electric discharge or sandblasting process will have the problems of uneven surface particle distribution, uneven size and irregular arrangement, resulting in different degrees of stray light phenomenon at different angles and positions, and this type of structure The matting effect is limited, and it cannot completely prevent harmful light from reflecting on the surface. The above methods are difficult to take into account the design of the lens barrel and the ability to eliminate stray light.

1 and 2, in some embodiments of the present application, the lens barrel 100 is provided with a light-passing cavity 102, the light-passing cavity 102 communicates with the object end and the image end of the lens barrel 100, and is formed at the object end of the lens barrel 100 The object end opening 104 forms an image end opening 106 at the image end of the lens barrel 100. The light-passing cavity 102 is used for arranging a lens, and light incident from the object side can enter the light-passing cavity 102 from the object end opening 104, and exit from the image end opening 106 after being adjusted by the lens. A plurality of extinction grooves 110 are provided on the cavity wall 1022 of the light-passing cavity 102, and the extinction grooves 110 are used to eliminate stray light.

2 and 3 in combination, in the first embodiment of the present application, the image end opening 106 includes an image end inner edge surface 1061, the image end inner edge surface 1061 faces and is parallel to the central axis 1002 of the lens barrel 100, image The inner edge surface 1061 of the end is part of the cavity wall 1022 of the light-passing cavity 102. The inner edge surface 1061 of the image end is provided with a plurality of extinction grooves 110 for eliminating stray light. The lens barrel 100 is arranged at regular intervals in the circumferential direction (which can also be understood as around the central axis 1002 of the extinction groove 110). The extinction groove 110 faces the central axis 1002 of the lens barrel 100, and the top width of the extinction groove 110 is greater than the bottom width. In addition, the extinction groove 110 extends in the direction of the central axis 1002 of the lens barrel 100, and the extinction groove 1100 communicates with the image space of the lens barrel 100 in a direction parallel to the central axis 1002. The light irradiated to the extinction groove 110 will be reflected multiple times in the extinction groove 110, and each reflection will cause the light to be consumed, thereby ultimately reducing the intensity of the light reflected from the extinction groove 110, thereby reducing stray light The effect of intensity. Among them, the regular arrangement of the extinction groove 110 can improve the consistency of the lens barrel 100 in reducing stray light in all directions. On the other hand, the regular arrangement design is conducive to more densely arranging the extinction grooves 110 in the lens barrel 100, thereby effectively increasing the extinction area and improving the extinction effect, and at the same time, it is also beneficial to the extinction groove 110 on the lens barrel 100. Processing. In addition, by arranging the extinction groove 110 on the cavity wall 1022 of the light-passing cavity 102 near the image end opening 106, it is possible to prevent part of the stray light from being directly reflected by the cavity wall 1022 at the image end opening 106 to the photosensitive element after being emitted from the lens. It should be noted that when the lens is installed in the light-passing cavity 102 to be assembled into an imaging lens, the central axis 1002 of the lens barrel 100 can coincide with the optical axis of the lens system.

Further, the groove surface of the delustering groove 110 includes a bottom surface 1100 located at the bottom of the groove structure, a first side surface 1101 located on one side of the groove structure, and a second side surface 1102 located on the other side of the groove structure, the bottom surface 1100, the first side surface 1101, and the second side surface 1102. Both sides 1102 are flat. And in this embodiment, the bottom surface 1100 faces and is parallel to the central axis 1002 of the lens barrel 100. In this application, when the central axis 1002 of the lens barrel 100 can translate radially to the bottom surface 1100 without passing through the first side surface 1101 and When the second side surface 1102 is used, it can be said that the bottom surface 1100 faces the central axis 1002. One end of the bottom surface 1100 is connected to the first side surface 1101, and the opposite end is connected to the second side surface 1102, that is, the first side surface 1101 and the second side surface 1102 are disposed oppositely. The bottom surface 1100 is vertical or nearly vertical (at an angle of 85° to 95°) on the first side surface 1101, and the bottom surface 1100 is inclined to the second side surface 1102. Through the above design, the first side surface 1101 that is vertical or nearly vertical to the bottom surface 1100 will not directly reflect incident light out of the extinction groove 110, and the second side surface 1102, which is an inclined surface, can match the bottom surface 1100 and the first side surface 1101 to the incident light. Realize multiple reflections, thereby eliminating stray light, so as to achieve a good extinction effect. In some embodiments, the second side surface 1102 can also be perpendicular or nearly perpendicular to the bottom surface 1100, and the first side surface 1101 can be inclined to the bottom surface 1100, so that the same effect can be achieved. In addition to the vertical and inclined relationship, in some embodiments, the extinction groove 110 may be designed as an asymmetric structure, for example, the angle between the first side surface 1101 and the bottom surface 1100 is different from the angle between the second side surface 1102 and the bottom surface 1100, At this time, compared with a symmetric structure, the extinction groove 110 with an asymmetric structure can reflect the incident light more times, thereby effectively improving the extinction effect.

The above-mentioned lens barrel 100 can increase the number of reflections of the light incident into the extinction groove 110, and the incident light can be effectively lost after multiple reflections, so as to achieve the effect of reducing the intensity of stray light, without the need for coating, sandblasting or electric discharge, etc. Ways to reduce the reflection of stray light, so as to effectively avoid the adverse appearance caused by the above methods, and at the same time take into account the good effect of eliminating stray light. In addition, due to the presence of the bottom surface 1100 of the above-mentioned matting groove 110, it is possible to prevent the end of the mold from being too sharp and the strength of the mold end to be insufficient, thereby effectively avoiding the problem of poor processing.

3 and 4, in the first embodiment, the width of the bottom surface 1100 of the extinction groove 110 in the circumferential direction of the lens barrel 100 satisfies the relationship: 0.005mm≦W1≦0.05mm. In particular, in some embodiments, the bottom surface 1100 is an arc surface, and W1 is the arc length of the arc surface in the circumferential direction. Through the above design, it is possible to effectively avoid the problem that the end of the mold for processing the matting groove 110 is too sharp and cause poor processing, and at the same time, it can also prevent the problem of poor matting caused by excessively large direct reflection area of stray light. When it is lower than the lower limit, the processing mold is too sharp, resulting in insufficient strength at the end of the mold, which is prone to poor processing; when it is higher than the upper limit, refer to Figure 5, the area of the bottom surface 1100 is too large, resulting in direct reflection of stray light The area also increases simultaneously, causing poor matting effect.

In addition, in the first embodiment, the first side surface 1101 and the second side surface 1102 in the same extinction groove 110 satisfy the angle relationship: 20°≦A1≦60°. When meeting the above design, it can take into account the processing strength of the mold and the matting effect of the matting groove 110, ensuring that the mold is within the processing limit, and increasing the number of reflections of light after entering the matting groove 110, thereby improving the processing yield and matting effect of the matting groove 110 . When it is lower than the lower limit, the mold will exceed the processing limit, and the strength of the mold is insufficient, and it is difficult to accurately process the extinction groove 110; and when it is higher than the upper limit, refer to Figure 5, the number of reflections after the light enters the extinction groove 110 is insufficient, and it is difficult Achieve good matting effect.

Continuing to refer to FIG. 4, in the first embodiment, the depth of the extinction groove 110 satisfies the relationship: 0.03mm≦H1≦0.15mm. In this embodiment, H1 can also be understood as the depth of the extinction groove 110 in the radial direction of the lens barrel 100. When the above design is satisfied, the number of reflections of incident light in the extinction groove 110 can be effectively increased. At the same time, the structural characteristics satisfying the above relationship can prevent the mold from deforming the structure of the extinction groove 110 during demolding, and also take into account the processing strength of the mold. . When it is lower than the lower limit, the number of reflections of the incident light in the extinction groove 110 is insufficient, and the extinction effect is poor; and when it is higher than the upper limit, the strength of the mold used for processing is insufficient, and the mold tends to damage the extinction groove 110 during demolding. The structure is deformed, resulting in poor processing.

3, in the first embodiment, the cavity wall 1022 includes a ring-shaped matte surface symmetrical about the central axis 1002 of the lens barrel 100, the matting groove 110 is provided on the ring-shaped matte surface of the cavity wall 1022, and the ring-shaped matte surface is on the center axis 1002 of the lens barrel 100. The radial diameter satisfies: 1.3mm≤B≤14.5mm. In addition, the number of extinction grooves 110 arranged at the same place around the lens barrel 100 satisfies the relationship: 80≦N≦200. The lens barrel 100 meeting the above design has a good matting effect.

4 and 5, in the first embodiment, a convex structure 120 is formed between two adjacent dimming grooves 110, and the width of the top of the convex structure 120 in the circumferential direction of the lens barrel 100 satisfies the relationship: 0.001 mm≤W2≤0.02mm. The top of the protruding structure 120 is in a planar structure or a curved structure. Any two of the extinction grooves 110 arranged adjacently in the circumferential direction constitute the protruding structure 120. For two adjacent extinction grooves 110 forming a protruding structure 120 In other words, the first side surface 1101 of one extinction groove 110 and the second side surface 1102 of the other extinction groove 110 serve as two opposite side surfaces of the protrusion structure 120. Therefore, W2 can also be understood as: the minimum distance between the first side surface 1101 and the second side surface 1102 in a convex structure 120 in the circumferential direction. When the above design is satisfied, it can effectively prevent the top reflection area of the protruding structure 120 from being too large. When it is lower than the lower limit, the mold processing tool does not have a suitable minimum arc angle and cannot achieve accurate processing; when it is higher than the upper limit, the direct reflection area of the top of the convex structure 120 is too large, and the matting effect is poor.

In the first embodiment, the first side surfaces 1101 of two adjacent dimming grooves 110 satisfy the angle relationship in space: 1°≤A2≤10°. When the above design is satisfied, it can be ensured that the distribution of the extinction grooves 110 is not too sparse, and at the same time, the workability of the extinction grooves 110 can be ensured. When it is lower than the lower limit, it will be difficult to realize the processing design of the extinction feature; and when it is higher than the upper limit, the distribution of the extinction grooves 110 is too sparse, and the extinction effect is poor.

In the first embodiment, for the first side surface 1101 and the second side surface 1102 that are two opposite sides of the protrusion structure 120, there is an angle relationship between the first side surface 1101 and the second side surface 1102: 1°≤A6≤ 10°. By adopting the above design, it is possible to prevent the protruding structure 120 from being too sharp as a whole, that is, the angle between the two side surfaces of the protruding structure 120 will not be too small, thereby preventing the deformation of the protruding structure 120 during demolding, and at the same time. It is beneficial that when the matting structure is formed by injection molding, the injection molding material can reach the tip of the mold, so that a good convex structure 120 can be formed.

With reference to FIGS. 6 and 7, in the second embodiment, the light-passing cavity 102 is provided with a plurality of extinction grooves 110 for eliminating stray light on the cavity wall 1022 close to the image end opening 106, and the plurality of extinction grooves 110 Arranged at intervals along the circumferential direction of the lens barrel 100, the extinction grooves 110 also extend in the direction of the central axis 1002 of the lens barrel 100. The area provided with the extinction groove 110 on the cavity wall 1022 can be referred to as an annular extinction surface, and the diameter of the annular extinction surface in the radial direction of the lens barrel 100 satisfies: 1.3mm≤B≤14.5mm.

The groove surface of the extinction groove 110 also includes a third side surface 1103 and a fourth side surface 1104. The third side surface 1103 is connected between the first side surface 1101 and the bottom surface 1100. The other end intersects the bottom surface 1100 perpendicularly or obliquely; the fourth side surface 1104 is connected between the second side surface 1102 and the bottom surface 1100, one end of the fourth side surface 1104 intersects the second side surface 1102 obliquely, and the opposite end is perpendicular or oblique to the bottom surface 1100 intersect. The above structure can effectively increase the depth of the extinction groove 110, increase the number of reflections of incident light in the extinction groove 110, and improve the extinction effect.

8, in the second embodiment, the matting groove 110 can be divided into a first groove 111 and a second groove 112, the second groove 112 is opened at the bottom of the first groove 111, the first side surface 1101 and the second groove The two side surfaces 1102 are used as side walls of the first groove 111, and the third side surface 1103 and the fourth side surface 1104 are used as side walls of the second groove 112. Specifically, in this embodiment, the third side surface 1103 and the fourth side surface 1104 are both perpendicular to the bottom surface 1100. At this time, the first side surface 1101 and the second side surface 1102 form a first groove 111 in space. 111 is a trapezoidal groove; the bottom surface 1100, the third side surface 1103 and the fourth side surface 1104 form a second groove 112, the second groove 112 is a rectangular groove, and the first groove 111 is connected to the second groove 112.

In the second embodiment, the width of the bottom surface 1100 of the extinction groove 110 in the circumferential direction of the lens barrel 100 satisfies the relationship: 0.01 mm≦W1≦0.05 mm. With the structure of the first groove 111 and the second groove 112, the above design can effectively avoid the problem that the end of the mold used to process the matting groove 110 is too sharp and cause poor processing, and can also prevent stray light The direct reflection area is too large to cause the problem of poor matting. When it is lower than the lower limit, the processing mold is too sharp, resulting in insufficient strength at the end of the mold, which is prone to poor processing; when it is higher than the upper limit, the area of the bottom surface 1100 is too large, causing the direct reflection area of stray light to increase simultaneously , Which in turn causes poor matting effect.

The depth of the first groove 111 satisfies the relationship: 0.03mm≤H2≤0.08mm. In this embodiment, H2 can also be understood as the depth of the first groove 111 in the radial direction of the lens barrel 100. When the above design is satisfied, the number of reflections of incident light in the extinction groove 110 can be effectively increased. At the same time, the structural characteristics satisfying the above relationship can prevent the mold from deforming the structure of the extinction groove 110 during demolding, and also take into account the processing strength of the mold. . When it is lower than the lower limit, the number of times the incident light is reflected in the extinction groove 110 is insufficient, and the extinction effect is poor; and when it is higher than the upper limit, the angle formed by the side walls of the first groove 111 is too small, and the mold is falling off. The structure of the extinction groove 110 is easily stretched and deformed during the mold, resulting in poor processing.

In addition, a convex structure 120 is formed between two adjacent extinction grooves 110. In the following embodiments, the relationship between the convex structure 120 and the first side surface 1101 and the second side surface 1102 of the extinction groove 110 may refer to the first The description in the embodiment will not be repeated here. The end of the protruding structure 120 close to the central axis 1002 of the lens barrel 100 is a sharp end. The angle between the sharp ends of two adjacent protruding structures 120 and the central axis 1002 of the lens barrel 100 is still denoted by A2. (Refer to FIG. 8), although A2 in this embodiment is different from A2 in the above-mentioned first embodiment in terms of literal definition, A2 in both embodiments can reflect the periodic angles of the extinction groove 110 distributed in the circumferential direction. Therefore, they are all represented by A2.

In the second embodiment, in addition to satisfying the above relationship, the extinction groove 110 also satisfies the following relationship:

20°≤A1≤60°; 1°≤A2≤10°; 1°≤A6≤10°; 0.03mm≤H1≤0.15mm; 80≤N≤200. A1 is the angle between the first side surface 1101 and the second side surface 1102 in the same extinction groove 110, A2 reflects the periodic angle of the extinction groove 110 in the circumferential direction, and A6 is the angle between the two opposite sides of the convex structure 120 The included angle, H1 is the depth of the extinction groove 110 in the radial direction of the lens barrel 100, and N is the number of the extinction grooves 110 arranged around the lens barrel 100 at the same place. And when the second embodiment satisfies the above relationship, the second embodiment can also obtain the effect of the corresponding relationship range in the above embodiment.

With reference to FIGS. 9 and 10 in combination, in the third embodiment of the present application, a dimming groove 110 of another structure is provided. In the third embodiment, a plurality of dimming grooves 110 are optionally arranged at a position of the cavity wall 1022 close to the image end opening 106, and the plurality of dimming grooves 110 are arranged at regular intervals along the circumferential direction of the lens barrel 100. The area provided with the extinction groove 110 on the cavity wall 1022 can be referred to as an annular extinction surface, and the diameter of the annular extinction surface in the radial direction of the lens barrel 100 satisfies: 1.3mm≤B≤14.5mm.

In this embodiment, one end of the third side surface 1103 obliquely intersects the first side surface 1101, and the opposite end obliquely intersects the bottom surface 1100; and one end of the fourth side surface 1104 obliquely intersects with the second side surface 1102, and the opposite end obliquely intersects with the second side surface 1102. The bottom surfaces 1100 intersect obliquely. The matting groove 110 in the third embodiment can also be divided into a first groove 111 and a second groove 112. At this time, the first groove 111 and the second groove 112 are both trapezoidal grooves.

In the third embodiment, a convex structure 120 is formed between two adjacent dimming grooves 110. The end of the convex structure 120 close to the central axis 1002 of the lens barrel 100 is a sharp end, and two adjacent convex structures 120 are formed. The included angle of the line connecting the sharp end of the lens barrel 100 to the central axis 1002 of the lens barrel 100 is still represented by A2 (refer to FIG. 10). Although A2 in this embodiment is different from the A2 in the above-mentioned first embodiment, although the literal definition is different, However, A2 in the two embodiments can reflect the periodic angle of the extinction groove 110 in the circumferential direction.

In the third embodiment, the extinction groove 110 satisfies the following relationship:

0.01mm≤W1≤0.05mm; 20°≤A1≤60°; 1°≤A2≤10°; 1°≤A6≤10°; 0.03mm≤H1≤0.15mm; 0.03mm≤H2≤0.08mm; 80≤ N≤200. Wherein, the definitions of W1, A1, A2, H1, H2, and N are the same as those in the first embodiment and the second embodiment. W1 is the width of the bottom surface 1100 of the extinction groove 110 in the circumferential direction of the lens barrel 100, A1 is the angle between the first side surface 1101 and the second side surface 1102 in the same extinction groove 110, and A2 reflects the distribution of the extinction groove 110 in the circumferential direction A6 is the angle between the two opposite sides of the convex structure 120, H1 is the depth of the extinction groove 110 in the radial direction of the lens barrel 100, and H2 is the first groove 111 in the radial direction of the lens barrel 100 The depth of N is the number of extinction grooves 110 arranged around the lens barrel 100 at the same place. And when the third embodiment satisfies the above relationship, the third embodiment can also obtain the effect of the corresponding relationship range in the above embodiment.

In addition, in the third embodiment, the third side surface 1103 and the fourth side surface 1104 satisfy an included angle relationship in space: 20°≦A3≦50°. When the above design is satisfied, the extinction structure can have a higher intensity, and at the same time, the number of reflections of incident light in the extinction groove 110 can be increased to ensure the extinction effect. When it is lower than the lower limit, the intensity of the extinction structure is insufficient; and when it is higher than the upper limit, the number of reflections of incident light in the extinction groove 110 is insufficient, resulting in a poor extinction effect.

With reference to FIG. 11 and FIG. 12 in combination, in the fourth embodiment of the present application, another structure of the extinction groove 110 is provided. The light-passing cavity 102 is provided with a plurality of extinction grooves 110 on the cavity wall 1022 close to the image end opening 106 for eliminating stray light. The extinction grooves 110 also extend in the direction of the central axis 1002 of the lens barrel 100, and the plurality of extinction grooves 110 They are arranged at regular intervals along the circumferential direction of the lens barrel 100. The area provided with the extinction groove 110 on the cavity wall 1022 can be referred to as an annular extinction surface, and the diameter of the annular extinction surface in the radial direction of the lens barrel 100 satisfies: 1.3mm≤B≤14.5mm.

In the fourth embodiment, the first side surface 1101 and the second side surface 1102 of the extinction groove 110 are both curved surfaces, and the tangent lines of the first side surface 1101 and the second side surface 1102 at the connection with the bottom surface 1100 have an inclined angle with the bottom surface 1100. Therefore, it can still be considered that both the first side surface 1101 and the second side surface 1102 intersect the bottom surface 1100 obliquely. In addition, in one extinction groove 110, the end of the first side surface 1101 away from the bottom surface 1100 is connected to the second side surface 1102 of the adjacent extinction groove 110. In some embodiments, only any one of the first side surface 1101 and the second side surface 1102 may be designed as a curved surface. The above-mentioned arc surface design is beneficial to diverge the light incident on the arc surface, so that the reflected light can be further reflected in the light extinction groove at more angles, so as to effectively reduce the stray light.

In the fourth embodiment, a convex structure 120 is formed between two adjacent dimming grooves 110. The end of the convex structure 120 close to the central axis 1002 of the lens barrel 100 is a sharp end, and two adjacent convex structures 120 are formed. The angle of the line connecting the sharp end of the lens barrel 100 to the central axis 1002 of the lens barrel 100 is still represented by A2 (refer to FIG. 11). Although A2 in this embodiment is different from A2 in the above-mentioned first embodiment, although the literal definition is different, However, A2 in the two embodiments can reflect the periodic angle of the extinction groove 110 in the circumferential direction. In addition, it should be noted that, in the actual processing in the following embodiments involving sharp ends, the sharp ends of the protruding structure 120 generally present a straight line segment or a circular arc structure of 0.001 mm to 0.02 mm.

In the fourth embodiment, the extinction groove 110 satisfies the relationship: 0<W1≤0.05mm; 1°≤A2≤10°; 0.03mm≤H1≤0.15mm; 80≤N≤200. W1 is the width of the bottom surface 1100 of the extinction groove 110 in the circumferential direction of the lens barrel 100, A2 reflects the periodic angle of the extinction groove 110 in the circumferential direction, H1 is the depth of the extinction groove 110 in the radial direction of the lens barrel 100, and N is the surrounding mirror The number of the extinction grooves 110 arranged in the same place of the barrel 100. And when the fourth embodiment satisfies the above relationship, the fourth embodiment can also obtain the effect of the corresponding relationship range in the above embodiment.

In the fourth embodiment, the distance between the intersection of the bottom surface 1100 of the extinction groove 110 and the first side surface 1101 to the intersection of the bottom surface 1100 and the second side surface 1102 of the adjacent extinction groove 110 is W3, and the adjacent extinction groove The relationship between 110 is satisfied: 0.03mm≤W3≤0.15mm. When the above design is satisfied, it can be ensured that the distribution of the extinction grooves 110 is not too sparse, and at the same time, the workability of the extinction grooves 110 can be ensured. When it is lower than the lower limit, it will be difficult to realize the processing design of the extinction feature; and when it is higher than the upper limit, refer to FIG. The number of reflections in 110 is insufficient to effectively reduce the intensity of stray light, resulting in poor matting effect.

In addition, the fourth embodiment also satisfies the relationship: 1°≤A6≤10°; where A6 is the angle between the two opposite sides of the protruding structure 120. When the foregoing relationship is satisfied, the fourth embodiment can also have the effect of the corresponding relationship in the first embodiment.

With reference to FIG. 14, FIG. 15, and FIG. 16, in the fifth embodiment of the present application, another structure of the extinction groove 110 is provided. The light-passing cavity 102 is provided with a plurality of extinction grooves 110 on the cavity wall 1022 close to the image end opening 106 for eliminating stray light. The plurality of extinction grooves 110 are arranged at regular intervals along the circumferential direction of the lens barrel 100. 110 also extends in the direction of the central axis 1002 of the lens barrel 100. The area provided with the extinction groove 110 on the cavity wall 1022 can be referred to as an annular extinction surface, and the diameter of the annular extinction surface in the radial direction of the lens barrel 100 satisfies: 1.3mm≤B≤14.5mm.

In the fifth embodiment, the groove surface of the extinction groove 110 includes a first side surface 1101, a second side surface 1102, a third side surface 1103, a fourth side surface 1104, a first transition surface 1107 and a second transition surface 1108. The first transition surface 1107 is located between the first side surface 1101 and the third side surface 1103. One end of the first transition surface 1107 is connected to the first side surface 1101, and the opposite end is connected to the third side surface 1103; the second transition surface 1108 is located on the second side surface Between 1102 and the fourth side surface 1104, one end of the second transition surface 1108 is connected to the second side surface 1102, and the opposite end is connected to the fourth side surface 1104. The first transition surface 1107 and the second transition surface 1108 are parallel or nearly parallel (for example, there are -5°～5° inclination angle) on the bottom surface 1100. In some embodiments, the first transition surface 1107 is obliquely connected to the first side surface 1101 and the third side surface 1103, and the second transition surface 1108 is obliquely connected to the second side surface 1102 and the fourth side surface 1104, respectively. The first side surface 1101, the second side surface 1102, the first transition surface 1107, and the second transition surface 1108 together serve as the groove surfaces of the first groove 111, and the third side surface 1103, the fourth side surface 1104 and the bottom surface 1100 serve as the second groove 112 In this embodiment, the first groove 111 and the second groove 112 are both trapezoidal grooves.

In the fifth embodiment, a convex structure 120 is formed between two adjacent dimming grooves 110. The end of the convex structure 120 close to the central axis 1002 of the lens barrel 100 is a sharp end, and two adjacent convex structures 120 are formed. The included angle of the line connecting the sharp end of the A to the central axis 1002 is represented by A2. Although A2 in this embodiment and A2 in the first embodiment are different in literal definition, A2 in both embodiments can be Reflects the periodic angles of the extinction grooves 110 in the circumferential direction, so the same number is used.

In the fifth embodiment, the matting groove 110 satisfies the relationship: 0.01mm≤W1≤0.05mm; 20°≤A1≤60°; 1°≤A2≤10°; 20°≤A3≤50°; 1°≤A6≤ 10°; 0.03mm≤H1≤0.15mm; 0.03mm≤H2≤0.08mm; 80≤N≤200. W1 is the width of the bottom surface 1100 of the extinction groove 110 in the circumferential direction of the lens barrel 100, H1 is the depth of the extinction groove 110 in the radial direction of the lens barrel 100, and H2 is the depth of the first groove 111 in the radial direction of the lens barrel 100, A1 is the angle between the first side surface 1101 and the second side surface 1102 in the same extinction groove 110, A2 reflects the periodic angle of the extinction groove 110 in the circumferential direction, and A3 is the third side surface 1103 and the fourth side surface 1104 spatially A6 is the included angle between the two opposite sides of the convex structure 120, and N is the number of extinction grooves 110 arranged around the lens barrel 100 at the same place. And when the fifth embodiment satisfies the above relationship, the fifth embodiment can also obtain the effect of the corresponding relationship range in the above embodiment.

Referring to FIG. 17 and FIG. 18, the sixth embodiment of the present application provides another way of arranging the extinction groove 110. In the sixth embodiment, the object end opening 104 of the lens barrel 100 includes an object end inner edge surface 1041, and the object end inner edge surface 1041 is inclined toward the object side of the lens barrel 100, that is, the object end inner edge surface 1041 is spatially and The central axis 1002 of the lens barrel 100 has an inclination angle. The inner edge surface 1041 of the object end is used as the side wall of the object end opening 104. The object end opening 104 is part of the light-passing cavity 102, and the inner edge surface 1041 of the object end also belongs to the light-passing A portion of the cavity wall 1022 of the cavity 102.

Along the circumference of the lens barrel 100, a plurality of extinction grooves 110 are provided on the inner edge surface 1041 of the object end at intervals. Facing the object side of the lens barrel 100, and the bottom surface 1100 of the extinction groove 110 is inclined toward the central axis 1002 of the lens barrel 100. The plurality of extinction grooves 110 provided on the inner edge surface 1041 of the object end are arranged at regular intervals along the circumferential direction of the lens barrel 100. When the extinction groove 110 is opened on the inner edge surface 1041 of the object end, it can effectively eliminate the stray light reaching the inner edge surface 1041 of the object end and prevent the inner edge surface 1041 of the object end from reflecting light into the lens system.

In this embodiment, since the inner edge surface 1041 of the object end is an inclined surface, the extension direction of the extinction groove 110 provided on the inner edge surface 1041 of the object end is also inclined to the central axis 1002 of the lens barrel 100. Referring to FIG. 19, the groove surface of the matting groove 110 in the sixth embodiment includes a bottom surface 1100, a first side surface 1101, a second side surface 1102, a third side surface 1103, and a fourth side surface 1104. The bottom surface 1100, the first side surface 1101, the second side surface 1102, the third side surface 1103, and the fourth side surface 1104 are all flat surfaces. One end of the third side surface 1103 obliquely intersects the first side surface 1101, and the opposite end is perpendicular or nearly perpendicular to the bottom surface 1100 Intersect vertically (for example, the angle between the two surfaces is between 85° and 95°); one end of the fourth side surface 1104 intersects the second side surface 1102 obliquely, and the opposite end intersects the bottom surface 1100 perpendicularly or nearly perpendicularly. The number of extinction grooves 110 provided on the inner edge surface 1041 of the object end satisfies 80≦N≦200. 17 and 19 in combination, the end of the bottom surface 1100 that intersects the third side surface 1103 and the end of the bottom surface 1100 that intersect the fourth side surface 1104 have an angle of A4 in space, and the end of the first side surface 1101 away from the fourth side surface 1104 The spatial angle between the second side surface 1102 and the end of the third side surface 1103 away from the third side surface 1103 is A5. The extinction groove 110 in the sixth embodiment satisfies the relationship: 1°≤A4≤10°; 1°≤A5≤10°. When the above design is satisfied, it can be ensured that the distribution of the extinction grooves 110 is not too sparse, and at the same time, the workability of the extinction grooves 110 can be ensured. When it is lower than the lower limit, it will be difficult to realize the processing design of the extinction feature; and when it is higher than the upper limit, the distribution of the extinction grooves 110 is too sparse, and the extinction effect is poor.

The plurality of extinction grooves 110 arranged around the inner edge surface 1041 of the object end form a ring-shaped extinction structure that is symmetric about the center axis 1002 of the lens barrel 100. At this time, in the radial direction of the lens barrel 100, twice the distance from the farthest position of any extinction groove 110 from the central axis 1002 of the lens barrel 100 to the central axis 1002 is numerically equal to the outer diameter of the annular extinction structure. Two times the distance from the position of any extinction groove 110 closest to the central axis 1002 of the lens barrel 100 to the central axis 1002 is numerically equal to the inner diameter of the ring-shaped extinction structure. The outer diameter of the ring-shaped extinction structure in the radial direction of the lens barrel 100 satisfies: 1.5mm≦C≦15mm; the inner diameter of the ring-shaped extinction structure in the radial direction of the lens barrel 100 satisfies: 1mm≦D≦14.5mm.

In some embodiments, when the extinction groove 110 is disposed on the above-mentioned inclined inner edge surface 1041 of the object end, the specific structure of the extinction groove 110 includes but is not limited to the solution shown in the sixth embodiment.

In this embodiment, the relationship is 1°≤A4≤10°; and 1°≤A5≤10°; where A4 is the end of the bottom surface 1100 that intersects the third side surface 1103 and the end of the bottom surface 1100 that intersects the fourth side surface 1104 In terms of the spatial angle, A5 is the spatial angle between the end of the first side surface 1101 away from the fourth side surface 1104 and the end of the second side surface 1102 away from the third side surface 1103 in space. In this embodiment, the end where the bottom surface 1100 intersects the third side surface 1103 and the fourth side surface 1104 is a straight side, the end of the first side surface 1101 away from the fourth side surface 1104 is a straight side, and the second side surface 1102 is away from the third side surface 1103. One end is a straight edge. When any one of the above-mentioned A4 and A5 relationships is satisfied, it can be ensured that the distribution of the extinction grooves 110 is not too sparse, and at the same time, the workability of the extinction grooves 110 can be ensured.

On the basis of the sixth embodiment, in addition to satisfying the above relationship, the matting groove 110 in some embodiments also satisfies the following relationship: 0.01mm≤W1≤0.05mm; 20°≤A1≤60°; 0.03mm≤H1≤0.15 mm; 0.03mm≤H2≤0.08mm. W1 is the width of the bottom surface 1100 in the circumferential direction of the lens barrel 100, A1 is the angle between the first side surface 1101 and the second side surface 1102 in the same extinction groove 110, H1 is the depth of the extinction groove 110, and H2 is the first recess The depth of the groove 111. When the above relationship is satisfied, these embodiments can also obtain the effects of the corresponding relationship range in the above embodiments.

In some embodiments, the groove surface of the delustering groove 110 only includes a bottom surface 1100, a first side surface 1101, and a second side surface 1102. At this time, in some embodiments, the first side surface 1101 and the second side surface 1102 are both flat ( Refer to the case of the first embodiment), while in other embodiments, both the first side surface 1101 and the second side surface 1102 are curved surfaces (refer to the structure of the fourth embodiment).

In some embodiments, the extinction groove 110 can be disposed at least one of the cavity wall 1022 of the lens barrel 100 relative to the central axis 1002 of the lens barrel 100 at the object end surface 1042 of the lens barrel 100, and the image end surface 1062 of the lens barrel 100. Except for the different positions in the lens barrel 100, the specific structure of the extinction groove 110 in some embodiments may be any one of the structures of the extinction groove 110 shown in the above embodiments, which will not be repeated here.

As mentioned above, by opening the above-mentioned extinction groove 110 on the lens barrel 100, the adverse effects of the current structure for eliminating stray light can be effectively overcome, and it is also beneficial to improve the processing accuracy of the extinction groove 110 and improve the consistency between the extinction grooves 110. Performance, and then achieve a good matting effect.

Referring to FIG. 20, in some embodiments, the present application also provides a camera module 20. The camera module 20 includes a lens 210 (represented by a dashed frame in the figure), a photosensitive element 220, and a lens barrel 100. The lens 210 is disposed at The light-passing cavity 102 of the lens barrel 100 and the photosensitive element 220 are arranged on the image side of the lens barrel 100. The number of lenses 210 arranged in the light-passing cavity 102 can be one, two, three or more, and each lens 210 is arranged coaxially, and the lens 210 and the lens barrel 100 together constitute a lens structure in the module. Light incident from the object side can enter the light-passing cavity 102 from the object end opening 104, exit from the image end opening 106 after being adjusted by the lens 210, and finally image on the photosensitive surface of the photosensitive element 220. The photosensitive element 220 may be a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor). By adopting the above-mentioned lens barrel 100, the camera module 20 can effectively reduce the generation of stray light and reduce the intensity of the stray light reaching the photosensitive element 220, thereby improving the imaging quality of the module.

In some embodiments, the above-mentioned extinction groove 110 may be provided on the ineffective light-passing area of the object side or the image side of the lens 210, and the specific structure of the extinction groove 110 provided in the lens 210 is the extinction groove 110 provided in the above embodiments. Any one of them will not be repeated here. When the stray light is incident on the extinction groove 110 on the lens 210, it will be reflected multiple times in the groove, so as to be effectively dissipated, thereby reducing the intensity of the final emission from the extinction groove 110.

Generally, the adjacent lenses 210 provided in the lens barrel 100 need to be fixed by a pressing ring. In some embodiments, the above-mentioned delustering groove 110 may also be provided in the pressing ring, so that the pressing ring also has a delustering effect. The specific structure of the delustering groove 110 provided in the pressing ring is any of the delustering grooves 110 provided in the above embodiments. One is not repeated here. When the stray light is incident on the extinction groove 110 on the pressure ring, it will be reflected multiple times in the groove, thereby being effectively dissipated, thereby reducing the intensity of the final emission from the extinction groove 110.

Referring to FIG. 21, some embodiments of the present application also provide an electronic device 30. The electronic device 30 includes a fixing member (not shown in the figure) and the aforementioned camera module 20. The camera module 20 is disposed on the fixing member and fixed The parts can be middle frame, circuit board and other parts. The electronic device 30 includes, but is not limited to, smart phones, tablet computers, notebook computers, personal digital assistants, game consoles, e-book readers, portable multimedia players (PMP), mobile medical devices, smart wearable devices, and the like. Specifically, when the camera module is applied to a smart phone, the camera module can be installed in the middle frame, and the camera module can be used as the front camera module and the rear camera module of the smart phone. By using the above-mentioned camera module, the stray light intensity in the imaging system can be effectively reduced, so that the electronic device 30 has a good effect.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply the pointed device or element It must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.

In the present invention, unless expressly stipulated and defined otherwise, the “on” or “under” of the first feature on the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. touch. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than that of the second feature. The “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , Structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A lens barrel, a cavity wall of the lens barrel is provided with a plurality of extinction grooves, the extinction grooves are used to reduce stray light, and the plurality of extinction grooves are arranged at intervals along the circumferential direction of the lens barrel. The groove surface of the matting groove includes a first side surface, a second side surface and a bottom surface, the bottom surface faces the central axis of the lens barrel, one end of the bottom surface is connected to the first side surface, and the opposite end is connected to the second side surface , The bottom surface has an oblique relationship with at least one of the first side surface and the second side surface.
The lens barrel according to claim 1, wherein the width of the bottom surface of the extinction groove in the circumferential direction of the lens barrel satisfies the relationship: 0.005mm≤W1≤0.05mm.
The lens barrel according to claim 1, wherein in the same extinction groove, there is an angle relationship between the first side surface and the second side surface: 20°≤A1≤60°.
The lens barrel according to claim 1, wherein the depth of the extinction groove satisfies the relationship: 0.03mm≤H1≤0.15mm.
The lens barrel according to claim 1, wherein the number of the extinction grooves arranged around the lens barrel at the same place satisfies the relationship: 80≤N≤200.
The lens barrel according to claim 1, wherein a convex structure is formed between two adjacent dimming grooves, and the width of the top of the convex structure in the circumferential direction of the lens barrel satisfies the relationship: 0.001mm≤W2≤0.02mm.
The lens barrel according to claim 1, wherein a convex structure is formed between any two adjacently arranged extinction grooves, and for the two adjacent extinction grooves constituting the convex structure In other words, the first side surface of one extinction groove and the second side surface of the other extinction groove serve as two opposite side surfaces of the protruding structure, and the all of one of the extinction grooves There is an included angle relationship between the first side surface and the first side surface of the other extinction groove: 1°≤A2≤10°.
The lens barrel according to any one of claims 1 to 7, wherein the extinction groove includes a third side surface and a fourth side surface, and the third side surface is connected between the first side surface and the bottom surface , There is an oblique angle between the third side surface and the first side surface, and the third side surface intersects the bottom surface perpendicularly or obliquely; the fourth side surface is connected to the second side surface and the bottom surface In between, there is an oblique angle between the fourth side surface and the second side surface, and the fourth side surface intersects the bottom surface perpendicularly or obliquely;

The matting groove can be divided into a first groove and a second groove. The second groove is opened at the bottom of the first groove, and the first side surface and the second side surface serve as the first groove. The side walls of the groove, the third side surface and the fourth side surface are used as the side walls of the second groove.
8. The lens barrel according to claim 8, wherein the depth of the first groove satisfies the relationship: 0.03mm≤H2≤0.08mm.
8. The lens barrel according to claim 8, wherein in the same extinction groove, the third side surface and the fourth side surface satisfy an angle relationship: 20°≤A3≤50°.
8. The lens barrel according to claim 8, wherein the width of the bottom surface of the extinction groove in the circumferential direction of the lens barrel satisfies the relationship: 0.01mm≤W1≤0.05mm.
The lens barrel according to claim 8, wherein the space between the end of the bottom surface intersecting the third side surface and the end of the bottom surface intersecting the fourth side surface is A4, and the The extinction groove satisfies the relationship:

1°≤A4≤10°.
8. The lens barrel according to claim 8, wherein the spatial angle between the end of the first side surface away from the fourth side surface and the end of the second side surface away from the third side surface is A5, The extinction groove satisfies the relationship:

1°≤A5≤10°.
The lens barrel according to claim 1, wherein a convex structure is formed between any two adjacently arranged extinction grooves, and for the two adjacent extinction grooves constituting the convex structure In other words, the first side surface of one extinction groove and the second side surface of the other extinction groove serve as two opposite side surfaces of the protrusion structure;

For the first side surface and the second side surface as the two opposite side surfaces of the protruding structure, there is an angle relationship between the first side surface and the second side surface: 1°≤A6≤10° .
The lens barrel according to claim 1, wherein one of the first side surface and the second side surface is perpendicular to the bottom surface, and the other surface is inclined to the bottom surface.
The lens barrel according to claim 1, wherein at least one of the first side surface and the second side surface is a curved surface.
The lens barrel according to claim 1, wherein the lens barrel is provided with a light-passing cavity, the light-passing cavity communicates with the object end and the image end of the lens barrel, and the light-passing cavity is connected to the lens barrel. The object end of the barrel forms an object end opening, and an image end opening is formed at the image end of the lens barrel. The object end opening includes an object end inner edge surface, and the object end inner edge surface is inclined toward the object end On the other hand, in the circumferential direction of the lens barrel, a plurality of the extinction grooves are spaced apart on the inner edge surface of the object end, and the bottom surfaces of the plurality of the extinction grooves are inclined toward the object side of the lens barrel.
The lens barrel according to claim 1, wherein the lens barrel is provided with a light-passing cavity, the light-passing cavity communicates with the object end and the image end of the lens barrel, and the light-passing cavity is connected to the lens barrel. The object end of the barrel forms an object end opening, and an image end opening is formed at the image end of the lens barrel. The image end opening includes an inner edge surface of the image end. A plurality of the extinction grooves are spaced apart on the edge surface, and the bottom surface of the plurality of extinction grooves is parallel to the central axis of the lens barrel.
A camera module, comprising a lens, a photosensitive element, and the lens barrel according to any one of claims 1 to 18, the lens is arranged on the lens barrel, and the photosensitive element is arranged on the image side of the lens barrel.
An electronic device, comprising a fixing part and the camera module according to claim 19, the camera module being arranged on the fixing part.