Lens module

Abstract

The lens module provided by the present invention includes a lens barrel and a lens. The lens barrel includes a first barrel wall formed with a light passing hole circumferentially, and a second barrel wall bent and extending from the first barrel wall. The first barrel wall includes a first wall surface surrounding the light passing hole and a second wall surface connecting the first wall surface and the second barrel wall. The first wall surface and the lens form a first gap communicating with the light passing hole at an interval along the optical axis direction. The supporting portion of the lens is abutted against the second wall surface. The first barrel wall is provided with a concave groove formed by recessing in a direction away from the lens from the second wall surface. One end of the concave groove extends to the connection portion between the second wall surface and the second barrel wall, and the other end extends to communicate with the first gap. The lens module provided by the present invention has good exhaust performance and stable optical performance.

Description

Technical Field

[0001] The present invention relates to the technical field of imaging devices, and particularly to a lens module.

Background Art

[0002] A lens module is an important optical component in portable electronic devices. A general lens module includes a lens barrel and a plurality of lenses housed in the lens barrel.

[0003] In the related art, in a high-temperature and high-humidity environment, the gas in the lens module cannot be exhausted, which causes a change in the air gap between the lenses, resulting in instability of the image plane curvature and peak value of the lens module, frequent occurrence of performance NG, significantly reducing the optical performance when applied in a high-temperature and high-humidity environment, and affecting the user experience.

[0004] Therefore, it is necessary to propose a new lens module to solve the above problems.

Summary of the Invention

[0005] An object of the present invention is to solve the above technical problems and provide a lens module having good exhaust performance and stable optical performance.

[0006] To achieve the above object, the present invention provides a lens module. The lens module includes a lens barrel having an accommodation cavity and a lens accommodated in the accommodation cavity. The lens barrel includes a first barrel wall formed with a light passing hole circumferentially and a second barrel wall bent and extending from the first barrel wall. The accommodation cavity is provided so as to be surrounded by the first barrel wall and the second barrel wall. The first barrel wall includes a first wall surface surrounding the light passing hole and a second wall surface connecting the first wall surface and the second barrel wall. The first wall surface and the lens form a first gap communicating with the light passing hole at an interval along the optical axis direction. The lens includes an optical portion located at an intermediate position and a support portion surrounding the optical portion. The support portion is in contact with the second wall surface. The first barrel wall is provided with a concave groove formed to be recessed in a direction away from the lens from the second wall surface. One end of the concave groove extends to a connection portion between the second wall surface and the second barrel wall, and the other end extends to communicate with the first gap. The lens module is characterized by the above.

[0007] Preferably, the support portion includes a first surface in contact with the second wall surface, a second surface in contact with the second barrel wall, and a third surface connecting the first surface and the second surface. The third surface forms a second gap at an interval from the lens barrel, and the concave groove communicates with the second gap.

[0008] Preferably, at least two of the concave grooves are provided on the first barrel wall, and at least two of the concave grooves are provided at equal intervals along the circumferential direction of the second wall surface.

[0009] Preferably, the concave groove has a trapezoidal cross section along the optical axis direction.

[0010] Preferably, the concave groove includes a groove bottom surface and groove side surfaces respectively arranged on both sides of the groove bottom surface, and the width of the concave groove gradually decreases from the groove bottom surface toward the second wall surface.

[0011] Preferably, the groove side surface includes a first connection point connected to the groove bottom surface and a second connection point connected to the second wall surface, and the distance between two of the first connection points located in the same cross section is smaller than the distance between two of the second connection points located in the same cross section.

[0012] Preferably, the first cylindrical wall is annular, the angle between two of the first connection points located in the same cross section is 10°, and the angle between two of the second connection points located in the same cross section is 20°.

[0013] Preferably, the recess depth of the concave groove is 3 to 5 micrometers.

[0014] Preferably, the lens module includes at least one of the lenses, and the lens closest to the object side along the optical axis direction is supported by the first cylindrical wall.

[0015] Compared with the related art, the lens module provided by the present invention includes a lens barrel and a lens. The lens barrel includes a first cylindrical wall formed with a light passing hole circumferentially provided, and a second cylindrical wall bent and extending from the first cylindrical wall. The first cylindrical wall includes a first wall surface surrounding the light passing hole, and a second wall surface connecting the first wall surface and the second cylindrical wall. A first gap is formed between the first wall surface and the lens with a space therebetween along the optical axis direction and communicating with the light passing hole. The support portion of the lens is abutted against the second wall surface. A concave groove is provided on the first cylindrical wall, recessed in a direction away from the lens from the second wall surface. One end of the concave groove extends to a connection portion between the second wall surface and the second cylindrical wall, and the other end extends to communicate with the first gap. By providing such a concave groove, it is possible to promote the gas discharge inside the lens module in a high temperature and high humidity environment, prevent the change of the air interval between the lenses, ensure the stable optical performance of the lens module, and the installation of this concave groove does not affect the flatness of the second wall surface, and can ensure the yield rate during the production of the lens module.

Brief Description of the Drawings

[0016] To more clearly explain the technical solutions in the embodiments of the present invention, the drawings necessary for explaining the embodiments will be briefly described below. Note that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without creative work.

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0018] Hereinafter, in relation to the drawings in the embodiments of the present invention, the technical aspects in the embodiments of the present invention will be clearly and completely described. It is obvious that the embodiments described here are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0019] As shown in FIG. 1, the present invention provides a lens module 100. This lens module 100 includes a lens barrel 120 having a housing cavity 110 and a lens 130 housed in the housing cavity 110.

[0020] Hereinafter, the specific structure of the lens module 100 in the present invention will be described in conjunction with FIGS. 2 to 6. Specifically, the lens barrel 120 includes a first barrel wall 122 that surrounds to form a light passage hole 121, and a second barrel wall 123 that extends curvedly from the first barrel wall 122. The first barrel wall 122 and the second barrel wall 123 surround to form the accommodation cavity 110.

[0021] Further, the first barrel wall 122 includes a first wall surface 1221 that surrounds the light passage hole 121, and a second wall surface 1222 that connects the first wall surface 1221 and the second barrel wall 123. A first gap 124 that communicates with the light passage hole 121 at an interval along the optical axis direction OO' is formed between the first wall surface 1221 and the lens 130.

[0022] The lens 130 includes an optical part 131 located at an intermediate position, and a support part 132 that surrounds the optical part 131. The support part 132 is in contact with the second wall surface 1222. The surface of the support part 132 facing the object side is in contact with the second wall surface 1222. A concave groove 1223 that is recessed in a direction away from the lens 130 from the second wall surface 123 is provided on the first barrel wall 122. One end of the concave groove 1223 extends to the connection point of the second wall surface 1222 and the second barrel wall 123, and the other end extends until it communicates with the first gap 124.

[0023] The support portion 132 includes a first surface 1321 that abuts against the second wall surface 1222, a second surface 1322 that abuts against the second cylindrical wall 123, and a third surface 1323 that connects the first surface 1321 and the second surface 1322. The third surface 1323 forms a second gap 125 at a distance from the lens barrel 120, and the concave groove 1223 communicates with the second gap 125. That is, one end of the concave groove 1223 communicates with the second gap 125, and the other end communicates with the first gap 124. In this way, when the lens module 100 is in a high-temperature and high-humidity environment, the internal gas can be transmitted through the concave groove 1223 to the first gap 124 and the light-passing hole 121 and discharged, preventing the air gap between the lenses 130 from changing and ensuring that the lens module 100 has good performance.

[0024] Furthermore, at least two of the concave grooves 1223 are provided on the first cylindrical wall 122, and at least two of each of the concave grooves 1223 are provided at equal interval distances along the circumferential direction of the second wall surface 1222. In this embodiment, four of the concave grooves 1223 are provided on the first cylindrical wall 122.

[0025] The concave groove 1223 has a trapezoidal cross-section along the optical axis direction OO'. Specifically, the concave groove 1223 includes a groove bottom surface 1224 and groove side surfaces 1225 disposed on both sides of the groove bottom surface 1224. The width of the concave groove 1223 gradually decreases from the groove bottom surface 1224 toward the second wall surface 1222. That is, the groove side surface 1225 includes a first connection point 1226 connected to the groove bottom surface 1224 and a second connection point 1227 connected to the second wall surface 1222, and the distance between two of the first connection points 1226 located in the same cross-section is smaller than the distance between two of the second connection points 1227 located in the same cross-section.

[0026] In this embodiment, as shown in FIG. 5, the lens barrel 120 is cylindrical, and correspondingly, the first cylindrical wall 122 is annular. The angle between two of the first connection points 1226 located in the same cross-section is 10°, and the angle between two of the second connection points 1227 located in the same cross-section is 20°.

[0027] In order to endow the lens module 100 with sufficiently good air exhaust performance, the concave groove 1223 has a concave depth of 3 to 5 micrometers. As shown in FIG. 4, the concave depth can be understood as the vertical distance h from the second connection point 1227 to the groove bottom surface 1224 along the optical axis direction. By setting it in this way, the first cylindrical wall 122 can still maintain good flatness, and the lens module 100 can ensure a high yield during production. In addition, the number, concave depth and cross-sectional shape of the concave groove 1223 can be adjusted according to actual needs.

[0028] Note that the lens module 100 includes at least one of the lenses 130. The lens 130 closest to the object side along the optical axis direction is supported by the first cylindrical wall 122. In this embodiment, one lens 130 will be described by way of example.

[0029] Compared with related technologies, the lens module provided by the present invention includes a lens barrel and a lens. The lens barrel includes a first barrel wall formed with a light passing hole peripherally, and a second barrel wall bent and extending from the first barrel wall. The first barrel wall includes a first wall surface surrounding the light passing hole and a second wall surface connecting the first wall surface and the second barrel wall. The first wall surface and the lens form a first gap communicating with the light passing hole at an interval along the optical axis direction. The support portion of the lens abuts against the second wall surface. A concave groove is provided on the first barrel wall, which is recessed in a direction away from the lens from the second wall surface. One end of the concave groove extends to the connection location between the second wall surface and the second barrel wall, and the other end extends to communicate with the first gap. This is the feature. By providing such a concave groove, it is possible to promote the gas discharge inside the lens module in a high-temperature and high-humidity environment, prevent the change of the air interval between the lenses, ensure the stable optical performance of the lens module, and the installation of this concave groove does not affect the flatness of the second wall surface, and can ensure the yield rate during the production of the lens module.

[0030] It should be noted that the above are only embodiments of the present invention. For those skilled in the art, it is possible to make improvements without departing from the creative idea of the present invention, but it should be noted that these are within the protection scope of the present invention.

Claims

1. A lens module comprising: a lens barrel having an accommodation cavity, and a lens accommodated in the accommodation cavity; the lens barrel includes a first barrel wall formed with a light passing hole circumferentially, and a second barrel wall extending by bending from the first barrel wall; the accommodation cavity is provided so as to be surrounded by the first barrel wall and the second barrel wall; the first barrel wall includes a first wall surface surrounding the light passing hole, and a second wall surface connecting the first wall surface and the second barrel wall; a first gap is formed between the first wall surface and the lens with a space therebetween along the optical axis direction and communicating with the light passing hole; the lens includes an optical portion located at an intermediate position and a support portion surrounding the optical portion; the support portion is in contact with the second wall surface; a concave groove is provided in the first barrel wall, recessed in a direction away from the lens from the second wall surface; one end of the concave groove extends to a connection portion between the second wall surface and the second barrel wall, and the other end extends to communicate with the first gap. A lens module characterized by the above.

2. The support portion includes a first surface in contact with the second wall surface, a second surface in contact with the second barrel wall, and a third surface connecting the first surface and the second surface; the third surface forms a second gap with a space from the lens barrel; the concave groove communicates with the second gap. The lens module according to claim 1, characterized by the above.

3. At least two of the concave grooves are provided in the first barrel wall, and at least two of the concave grooves are provided at equal intervals along the circumferential direction of the second wall surface. The lens module according to claim 1, characterized by the above.

4. The concave groove has a trapezoidal cross-section along the optical axis direction. The lens module according to claim 1, characterized by the above.

5. The concave groove includes a groove bottom surface, and groove side surfaces respectively arranged on both sides of the groove bottom surface; the width of the concave groove gradually decreases from the groove bottom surface toward the second wall surface. The lens module according to claim 4, characterized by the above.

6. The groove side surface includes a first connection point connected to the groove bottom surface and a second connection point connected to the second wall surface; the distance between two of the first connection points located in the same cross-section is smaller than the distance between two of the second connection points located in the same cross-section. The lens module according to claim 5, characterized by the above.

7. The first cylindrical wall is annular, the angle between the two first connection points located in the same cross section is 10°, and the angle between the two second connection points located in the same cross section is 20°. The lens module according to claim 6, characterized in that.

8. The depth of the recess of the concave groove is 3 to 5 micrometers. The lens module according to claim 1, characterized in that.

9. The lens module includes at least one of the lenses, and the lens closest to the object side along the optical axis direction is supported by the first cylindrical wall. The lens module according to claim 1, characterized in that.

Images