Lens barrel and lens module

Abstract

A lens barrel and a lens module. The lens barrel comprises a lens barrel body, which is hollow and has two open ends, and a bearing wall, which is bent and extends inwards from an object-side end of the lens barrel body and encloses a light through hole, characterized in that a plurality of extinction areas protruding in the direction of an optical axis of the lens barrel are provided on an image-side surface of the bearing wall, and the plurality of extinction areas are distributed at intervals in the circumferential direction of the bearing wall; and each extinction area comprises a plurality of straight extinction strips protruding from the image-side surface, each of the straight extinction strips extends from the end of the image-side surface of the bearing wall that is close to the lens barrel body to the end thereof that is close to the optical axis, and every two adjacent straight extinction strips are spaced from each other to form a ventilation groove for ventilation. Compared with the prior art, the lens barrel and the lens module in the present utility model have better reliability.

Description

Lens barrel and lens module

Technical field

[0001] The utility model relates to the field of optical imaging, in particular to a lens barrel and a lens module used in the field of photographic and video products. [Background Technology]

[0002] With the continuous development of science and technology, optical lens modules are widely used in consumer digital products such as mobile phones, laptops, toys, industrial detection, automotive cameras and medical fields. With the development of imaging technology and the widespread use of electronic products with camera functions, optical lens module components are widely used in various fields of life.

[0003] The lens module of the related technology includes a lens barrel with a receiving space and a lens group installed in the lens barrel body. The lens barrel includes a lens barrel body with a receiving space and a supporting wall that bends inward and extends from the object side end of the lens barrel body to form a light hole.

[0004] However, in the related art, since the image side surface of the supporting wall is planar and the object side surface of the lens group is also planar, when the object side surface of the lens group abuts the image side surface of the supporting wall, the two are fitted together to form a sealing effect, so that the gas inside the lens barrel cannot be discharged after the high temperature and high humidity test, which causes the air gap of the lens group to change, that is, the on-axis spacing between adjacent lenses of the lens group changes, which leads to unstable field curvature and peak value of the lens module imaging, resulting in performance failure and poor reliability.

[0005] Therefore, it is necessary to provide a new lens barrel and lens module to solve the above technical problems.

[0006] [Utility Model Content]

[0007] The purpose of the utility model is to provide a lens module to solve the problem that the internal gas of the lens cannot be discharged in a high temperature and high humidity environment, causing the air gap to change and resulting in performance failure.

[0008] In the first aspect, an embodiment of the utility model provides a lens module, comprising a lens barrel body which is hollow and open at both ends, and a supporting wall which is bent inward and extended from the object side end of the lens barrel body to form a light-through hole, the image side surface of the supporting wall is provided with a plurality of extinction areas protruding along the optical axis direction of the lens barrel, and the plurality of extinction areas are arranged at intervals along the circumference of the supporting wall; the extinction area comprises a plurality of straight extinction strips protruding from the image side surface, and the straight extinction strips are evenly distributed in the extinction area, and each of the straight extinction strips extends from one end of the image side surface of the supporting wall close to the lens barrel body to its end close to the optical axis, and two adjacent straight extinction strips are spaced apart from each other to form a ventilation groove for ventilation.

[0009] Preferably, the width of the ventilation groove is 10-30 microns.

[0010] Preferably, the vent groove has a depth of 2-10 microns.

[0011] Preferably, the linear scanning extinction roughness Rt of the extinction area is 1-10 microns.

[0012] Preferably, the extinction regions include four and are arranged at equal intervals.

[0013] Preferably, the number of the linear extinction strips in each extinction region is 70, and the size of the interval between two adjacent extinction regions is half the size of a single extinction region.

[0014] In a second aspect, an embodiment of the present invention further provides a lens module, which includes the lens barrel described in any one of the above embodiments and a lens group installed in the lens barrel, and the object side of the lens group abuts against the extinction area.

[0015] Compared with the related art, the lens barrel and lens module of the present invention are provided with a plurality of extinction areas formed by protruding along the optical axis direction of the lens barrel on the image side surface of the supporting wall, and the plurality of extinction areas are arranged at intervals along the circumference of the supporting wall; the extinction area includes a plurality of linear extinction strips protruding from the image side surface, and each linear extinction strip extends from one end of the image side surface of the supporting wall close to the lens barrel body to its end close to the optical axis, and two adjacent linear extinction strips are spaced apart from each other to form ventilation grooves for ventilation. The design of the above structure enables the lens barrel to be used in the lens module, and the internal gas of the lens module can be discharged along the ventilation grooves of the extinction area when the lens module is in a high temperature and high humidity environment. At the same time, because the extinction area adopts a mature linear extinction process, it effectively prevents external moisture from entering the interior of the lens barrel, thereby effectively improving the reliability of the lens barrel and the lens module.

Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] FIG1 is a schematic diagram of the three-dimensional structure of a lens barrel provided by an embodiment of the present utility model;

[0018] FIG2 is a bottom view of the lens barrel provided by an embodiment of the present utility model;

[0019] FIG3 is a partial enlarged view of the portion shown in A in FIG3 ;

[0020] FIG4 is a cross-sectional view along line BB in FIG1 ;

[0021] FIG5 is a partial enlarged view of the portion indicated by C in FIG4 . [Specific implementation method]

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] (Example 1)

[0024] 1-5 , the present invention provides a lens barrel 100 , comprising a lens barrel body 11 that is hollow and open at both ends, and a supporting wall 12 that bends inwardly and extends from the object-side end of the lens barrel body 11 to form a light-through hole 13 .

[0025] The image side surface of the supporting wall 12 is provided with a plurality of extinction areas 121 protruding along the optical axis direction of the lens barrel 100 . The plurality of extinction areas 121 are arranged at intervals along the circumference of the supporting wall 12 .

[0026] An un-extinct area is formed between two adjacent extinction areas. The extinction area 121 includes a plurality of linear extinction bars 1212 protruding from the image side surface. The linear extinction bars 1212 are evenly distributed in the extinction area 121. Each linear extinction bar 1212 extends from one end of the image side surface of the supporting wall 12 close to the lens barrel body 11 to one end close to the optical axis 13. Two adjacent linear extinction bars 1212 are spaced apart from each other to form ventilation grooves 1211 for ventilation. That is, each ventilation groove 1211 connects the outer periphery of the image side of the supporting wall 12 with its inner periphery for ventilation. The arrangement of the linear extinction bars 1212 ensures that their starting and ending positions pass through the image side surface of the supporting wall, thereby ensuring that the gas is discharged smoothly.

[0027] After the lens module is assembled within the lens barrel 100, when tested under high temperature and high humidity conditions, the air within the lens barrel 100 flows along the vent grooves 1211 to the light aperture 13 and is released to the outside, thereby improving the reliability of the lens module in high temperature and high humidity environments. Furthermore, the matte area utilizes a mature linear matte strip treatment, effectively preventing external moisture from entering the lens barrel, further improving reliability.

[0028] The number of the straight matte strips 1212, the size of the matte range and the matte roughness value can be adjusted according to the actual size of the supporting wall 12, and the larger the matte area 121, the higher the flatness of the support obtained, the less likely the matte protrusion will be crushed after assembly, and the greater the stability.

[0029] In this embodiment, the width of the vent groove 1211 is 10-30 microns. Of course, the width of the vent groove 1211 can be adjusted according to actual conditions. Preferably, the width of the vent groove 1211 is 20 microns. In this embodiment, the depth of the vent groove 1211 is 2-10 microns. Of course, the depth of the vent groove 1211 can be adjusted according to actual conditions. Preferably, the depth of the vent groove 1211 is 3.56 microns.

[0030] In this embodiment, the linear scan extinction roughness Rt of the extinction region 121 is 1-10 microns. Roughness Rt refers to the maximum peak-to-valley height of the roughness within the profile evaluation length. Specifically, the roughness Rt can range from 1 micron to 10 microns. This configuration effectively ensures the flatness of the extinction region 121 and improves reliability. Preferably, the linear scan extinction roughness Rt of the extinction region 121 is 6 microns.

[0031] In this embodiment, the extinction regions 121 include four and are arranged at equal intervals. Of course, the number of the extinction regions 121 is not limited to four. Other numbers such as two, three, and five are also feasible. It is also feasible for the extinction regions 121 to completely cover the supporting wall 12. The number can be adjusted arbitrarily according to actual conditions.

[0032] In this embodiment, the number of linear extinction strips 1212 in each extinction region 121 is 70, and the size of a single non-extinction region is half the size of a single extinction region. Of course, the number of linear extinction strips 1212 in each extinction region 121 is not limited to 70, and the ratio of the extinction region to the non-extinction region is not limited to 2:1. The number can be adjusted arbitrarily based on actual conditions.

[0033] (Example 2)

[0034] The present invention further provides a lens module, which includes the lens barrel as described in Example 1 and a lens group installed in the lens barrel, wherein the object side of the lens group abuts against the extinction area 121 .

[0035] Table 1 shows the test results of the air gap change of the lens barrel and lens module before and after the high temperature and high humidity test without the extinction area design in the prior art.

[0036]

Table 1

[0037] Where P represents the lens and AIR represents the air gap change.

[0038] As can be seen from Table 1, under high temperature and high humidity environments, the air gap variation of the lens barrel and lens module that do not adopt the extinction area design increases significantly, exceeding the normal range, resulting in performance problems of the lens barrel and lens module.

[0039] The air gap changes of Examples 1 and 2 of the present invention before and after the high temperature and high humidity test are shown in the following figures:

[0040] Table 2 shows the results of the air gap changes of Examples 1 and 2 before and after the high temperature and high humidity test.

[0041]

Table 2

[0042] Tables 1 and 2 show that the air gap changes before and after the high-temperature, high-humidity test were small and within the normal range. This effectively solves the problem of air remaining inside the lens barrel and lens module in high-temperature, high-humidity environments, improving the reliability of the lens barrel and lens module.

[0043] Compared with the related art, the lens barrel and lens module of the present invention are provided with a plurality of extinction areas formed by protruding along the optical axis direction of the lens barrel on the image side surface of the supporting wall, and the plurality of extinction areas are arranged at intervals along the circumference of the supporting wall; the extinction area includes a plurality of linear extinction strips protruding from the image side surface, and each linear extinction strip extends from one end of the image side surface of the supporting wall close to the lens barrel body to its end close to the optical axis, and two adjacent linear extinction strips are spaced apart from each other to form ventilation grooves for ventilation. The design of the above structure enables the lens barrel to be used in the lens module, and the internal gas of the lens module can be discharged along the ventilation grooves of the extinction area when the lens module is in a high temperature and high humidity environment. At the same time, because the extinction area adopts a mature linear extinction process, it effectively prevents external moisture from entering the interior of the lens barrel, thereby effectively improving the reliability of the lens barrel and the lens module.

[0044] The above is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the scope of protection of the present invention.

Claims

1. A lens barrel, comprising a lens barrel body which is hollow and has openings at both ends, and a supporting wall which is bent inwardly and extends from the object side end of the lens barrel body to form a light-through hole, characterized in that: The image side surface of the supporting wall is provided with a plurality of extinction areas protruding along the optical axis direction of the lens barrel, and the plurality of extinction areas are arranged at intervals along the circumference of the supporting wall; the extinction area includes a plurality of linear extinction strips protruding from the image side surface, and the linear extinction strips are evenly distributed in the extinction area, and each of the linear extinction strips extends from one end of the image side surface of the supporting wall close to the lens barrel body to its end close to the optical axis, and two adjacent linear extinction strips are spaced apart from each other to form a ventilation groove for ventilation.

2. The lens barrel according to claim 1, characterized in that: The width of the ventilation groove is 10-30 microns.

3. The lens barrel according to claim 2, characterized in that: The depth of the ventilation groove is 2-10 microns.

4. The lens barrel according to claim 1, characterized in that: The linear scanning extinction roughness Rt of the extinction area is 1-10 microns.

5. The lens barrel according to claim 1, characterized in that: The extinction regions include four regions which are arranged at equal intervals.

6. The lens barrel according to claim 5, characterized in that: The number of the straight extinction strips in each extinction region is 70, and the size of the interval between two adjacent extinction regions is half the size of a single extinction region.

7. A lens module, comprising a lens barrel as described in any one of claims 1 to 6 and a lens group installed in the lens barrel, wherein the object side of the lens group abuts against the extinction area.

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