WO2022116276A1

WO2022116276A1 - Lens module and image pick-up device

Info

Publication number: WO2022116276A1
Application number: PCT/CN2020/136958
Authority: WO
Inventors: 王海龙
Original assignee: 诚瑞光学(深圳)有限公司; 常州市瑞泰光电有限公司
Priority date: 2020-12-01
Filing date: 2020-12-16
Publication date: 2022-06-09
Also published as: CN212321949U

Abstract

A lens module (100) and an image pick-up device, the image pick-up device comprising the lens module (100). The lens module (100) comprises a lens barrel (20) and a lens set (10). The lens set (10) comprises a first lens (11), a second lens (12), a third lens (13) and a fourth lens (14) which are sequentially stacked from an object side to an image side. The lens barrel (20) comprises a barrel wall (21), a top wall (23) and a bending wall (22), wherein an accommodating space (201) is enclosed by the bending wall (22), and the first lens (11) is partially received in the accommodating space (201). The lens module (100) also comprises a first light shielding sheet (101) arranged on an object side of the fourth lens (14). The first light shielding sheet (101) comprises a first light shielding portion (1011) sandwiched between the third lens (13) and the fourth lens (14), and a second light shielding portion (1012) extending from the first light shielding portion (1011) to be sandwiched between the barrel wall (21) and the fourth lens (14). The lens module (100) further comprises second light shielding sheets (102) sandwiched between the second light shielding portion (1012) and the barrel wall (21), and the second light shielding sheets (102) are arranged on a peripheral side of the third lens (13) at intervals. The lens module (100) can effectively improve the assembly yield of the lens module (100).

Description

Lens module and camera device

technical field

The present application relates to the technical field of camera lenses, and in particular, to a lens module and a camera device.

Background technique

Optical lens is an indispensable component in machine vision system, which directly affects the quality of imaging and the realization and effect of algorithm.

In the existing ultra-small lens, the lens module includes a lens barrel and at least four lenses with different diameters. Among them, the fourth lens is easily deformed due to uneven force during the assembly process of the lens module due to structural limitations. , which will affect the assembly yield of the lens module.

Therefore, it is necessary to provide a new type of lens module to solve the above problems.

technical problem

In the existing lens, when the lens module includes a lens barrel and at least four lenses with different diameters, the fourth lens is easily deformed due to uneven force during the assembly process of the lens module due to structural limitations, reducing the lens's durability. Assembly yield.

technical solutions

The purpose of the present application is to provide a lens module and a camera device, which can solve the problem of deformation of the fourth lens during the assembly process of the lens module and improve the assembly yield of the lens module.

The purpose of the present application is achieved by the following technical solutions: the present application provides a lens module, including a lens barrel and a lens group, and the lens group is installed in the lens barrel; the lens group includes sequentially from the object side to the image side. Laminated first lens, second lens, third lens and fourth lens; the lens barrel includes a barrel wall fixed with the lens group, bent and extended from the barrel wall to be fixed on the first lens object A side top wall and a curved wall extending from the end of the top wall away from the cylinder wall to the object side and having a light-passing hole, the curved wall encloses a accommodating space, and the first lens is partially accommodated in the accommodation space;

Wherein, the barrel wall includes a first abutting surface abutting on the peripheral side of the third lens, a second abutting surface abutting on the peripheral side of the fourth lens, and connecting the first abutting surface and the peripheral side of the fourth lens. The third abutting surface of the second abutting surface is in contact with the object side of the fourth lens; the lens module further includes a A first shading sheet, the first shading sheet includes a first shading portion sandwiched between the third lens and the fourth lens, and extending from the first shading portion to sandwiched between the third lens a second shading part between the abutting surface and the fourth lens; the lens module further includes a second shading plate sandwiched between the second shading part and the third abutting surface, so The second light-shielding sheet is arranged on the peripheral side of the third lens at intervals.

In the lens module provided by the embodiment of the present application, the fourth lens includes an optical part for imaging and a carrying part surrounding the optical part, and the first light shielding part is sandwiched between the carrying part and the carrying part. between the third lenses.

In the lens module provided by the embodiment of the present application, the optical part includes a first optical part located in a middle position and a second optical part surrounding the first optical part, and the image side of the first optical part faces the image The side protrusion forms a convex portion, and the object side surface of the second optical portion is concave toward the image side to form a concave portion.

In the lens module provided by the embodiment of the present application, the first lens includes a first surface close to the object side, a second surface facing the bending wall, and a third surface abutting against the top wall, the Both the third side and the first side are connected to the second side.

In the lens module provided by the embodiment of the present application, the lens module includes a first pressure ring, and the bearing portion abuts with the first pressure ring to fix the fourth lens.

In the lens module provided by the embodiment of the present application, the lens group includes a fifth lens, the lens module includes a second pressure ring; the fifth lens is located on the image side of the fourth lens; the first lens The second pressing ring is in contact with the fifth lens to fix the fifth lens.

In the lens module provided by the embodiment of the present application, the lens barrel includes a first installation groove, a second installation groove, a third installation groove, a fourth installation groove, a fifth installation groove, and a sixth installation groove with gradually increasing inner diameters. a groove and a seventh installation groove, the light-passing hole communicates with the first installation groove, and the second abutting surface and the third abutting surface surround the fourth installation groove;

The first lens is installed in the first installation groove, the second lens is installed in the second installation groove, the third lens is installed in the third installation groove, and the first lens is installed in the third installation groove. Four lenses are installed in the fourth installation groove, the first pressure ring is installed in the fifth installation groove, the fifth lens is installed in the sixth installation groove, and the second pressure ring is installed in the seventh installation groove.

In the lens module provided by the embodiment of the present application, the lens module includes a third shading sheet, and both sides of the third shading sheet are respectively in contact with the first lens and the second lens;

And/or, the lens module includes a fourth shading sheet, and both sides of the fourth shading sheet are respectively abutted with the second lens and the third lens;

And/or, the lens module includes a fifth shading sheet, and two sides of the fifth shading sheet are respectively abutted with the second pressing ring and the fifth lens.

In the lens module provided by the embodiment of the present application, during the assembly process of the lens module, the deformation range of the second light-shielding plate is 1 μm to 2 μm.

The present application also provides a camera device including the above-mentioned lens module.

beneficial effect

Compared with the prior art, in the embodiment of the present application, two shading sheets are arranged between the fourth lens and the cylinder wall, that is, the second shading part and the second shading sheet of the first shading sheet are located between the fourth lens and the cylinder wall Between the fourth lens and the third lens, a shading sheet is arranged, that is, the first shading part of the first shading sheet is located between the fourth lens and the third lens. The first shading sheet is a component required for the normal assembly of the lens module. During the assembly process of the lens module, the setting of the second shading sheet fills the gap between the first shading sheet and the barrel wall, which can reduce the fourth lens. The amount of deformation caused by the force prevents the fourth lens from being deformed too much and affecting the assembly yield of the lens module.

Description of drawings

1 is a schematic cross-sectional view of a lens module provided by an embodiment of the present application;

Fig. 2 is the enlarged view of A place in Fig. 1;

3 is a schematic cross-sectional view of the fourth lens in FIG. 1;

4 is a schematic cross-sectional view of the lens barrel in FIG. 1;

5 is a schematic cross-sectional view of the assembly of the first lens and the lens barrel in FIG. 1;

FIG. 6 is an enlarged view of B in FIG. 1 .

The figure shows:

100. Lens module;

10, lens group; 11, first lens; 111, first surface; 112, second surface; 113, third surface; 12, second lens; 13, third lens; 14, fourth lens; 141, optics part; 1411, the first optical part; 1412, the second optical part; 1401, the convex part; 1402, the concave part; 142, the bearing part; 15, the fifth lens;

101, the first shading sheet; 1011, the first shading part; 1012, the second shading part; 102, the second shading sheet; 103, the third shading sheet; 104, the fourth shading sheet; 105, the fifth shading sheet; 106 , the first pressure ring; 107, the second pressure ring; 1071, the gap;

20, lens barrel; 21, barrel wall; 211, first installation slot; 212, second installation slot; 213, third installation slot; 214, fourth installation slot; 215, fifth installation slot; 216, sixth installation Slot; 217, seventh installation slot; 218, groove; 2101, first abutting surface; 2102, second abutting surface; 2103, third abutting surface; 22, bending wall; 221, light-passing hole; 2211 , reflecting part; 23, top wall;

201, accommodation space; 202, dispensing tank.

Embodiments of the present invention

The present application will be further described below with reference to the accompanying drawings and embodiments.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship described in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and features in the embodiments may be combined with each other without conflict.

As shown in FIGS. 1 to 5 , a first aspect of the embodiments of the present application provides a lens module 100 , which includes a lens barrel 20 and a lens group 10 , and the lens group 10 is installed in the lens barrel 20 . The lens group 10 includes a first lens 11 , a second lens 12 , a third lens 13 and a fourth lens 14 which are sequentially stacked from the object side to the image side. It can be understood that, among the four lenses, the first lens 11 has the smallest diameter and is installed on the object side of the lens module 100 . The lens barrel 20 includes a barrel wall 21 fixed with the lens group 10 , a top wall 23 bent and extended from the barrel wall 21 to the object side of the first lens 11 , and an end of the top wall 23 away from the barrel wall 21 bent to the object side. The bending wall 22 extends and has a light-passing hole 221 . The bending wall 22 surrounds and forms an accommodating space 201 , and the first lens 11 is partially accommodated in the accommodating space 201 .

1 and 2 , the cylindrical wall 21 includes a first abutting surface 2101 abutting on the peripheral side of the third lens 13 , a second abutting surface 2102 abutting on the peripheral side of the fourth lens 14 , and connecting the first abutting surface 2101 . The first abutting surface 2101 and the third abutting surface 2103 of the second abutting surface 2102 are in contact with the object side surface of the fourth lens 14 . The lens module 100 further includes a first shading sheet 101 disposed on the object side of the fourth lens 14 , and the first shading sheet 101 includes a first shading portion 1011 sandwiched between the third lens 13 and the fourth lens 14 and a A light-shielding portion 1011 extends to the second light-shielding portion 1012 sandwiched between the third abutting surface 2103 and the fourth lens 14 . The lens module 100 further includes a second light-shielding sheet 102 sandwiched between the second light-shielding portion 1012 and the third abutting surface 2103 .

It can be understood that, referring to FIG. 5 , the first lens 11 includes a first surface 111 close to the object side, a second surface 112 facing the bending wall 22 , and a third surface 113 abutting against the top wall 23 . The third surface 113 and the first surface 111 are connected to the second surface 112 . The contour of the first lens 11 matches the contour of the accommodating space 201 , and the existence of the bending wall 22 and the second surface 112 makes the thickness of the first lens 11 thicker than that of ordinary lenses, which meets the performance requirements of ultra-small lenses.

It can be understood that, among the four lenses in the lens group 10, the first lens 11, the second lens 12, the third lens 13 and the fourth lens 14 are sequentially stacked and installed in the lens barrel 20, so that the adjacent lenses are mutually The abutment enhances the stability of the lens module 100 . Due to the requirements of the structure and performance of the lens module 100 , the diameter of the fourth lens 14 and the diameter of the third lens 13 are quite different, resulting in an excessively small contact area between the fourth lens 14 and the third lens 13 , which is assembled in the lens module 100 During the process, the fourth lens 14 will be deformed too much after being stressed.

By adopting the above technical solution, two shading sheets are arranged between the fourth lens 14 and the cylinder wall 21 , that is, the second shading portion 1012 and the second shading sheet 102 are both located between the fourth lens 14 and the cylinder wall 21 . A shading sheet is disposed between the fourth mirror 14 and the third mirror 13 , that is, the first shading portion 1011 is located between the fourth mirror 14 and the third mirror 13 . The first shading sheet 101 is a component required for the normal assembly of the lens module 100. During the assembly process of the lens module 100, the setting of the second shading sheet 102 fills the gap between the first shading sheet 101 and the cylinder wall 21, The deformation amount caused by the force of the fourth lens 14 can be reduced, and the excessive deformation of the fourth lens 14 can be prevented from affecting the assembly yield of the lens module 100 .

It can be understood that, during the assembly process of the lens module 100 , the deformation range of the second light shielding sheet 102 is 1 μm to 2 μm.

Referring to FIG. 2 and FIG. 3 , in an optional embodiment, the fourth lens 14 includes an optical portion 141 and a bearing portion 142 . The first light shielding portion 1011 is sandwiched between the bearing portion 142 and the third lens 13 . Specifically, the optical part 141 is used for imaging, and includes a first optical part 1411 in the middle position and a second optical part 1412 surrounding the first optical part 1411. The image side of the first optical part 1411 protrudes toward the image side to form a convex part 1401 , the object side surface of the second optical portion 1412 is concave toward the image side to form a concave portion 1402 .

Referring to FIG. 1 , in an optional embodiment, the lens group 10 includes a fifth lens 15 , and the fifth lens 15 is located on the image side of the fourth lens 14 .

Exemplarily, in order to ensure the imaging quality of the lens module 100 , among the five lenses in the lens group 10 , the first lens 11 as a whole is convex toward the object side, the third lens 13 , the fourth lens 14 and the fifth lens 15 Both protrude toward the image side.

Referring to FIG. 1 , in an optional embodiment, the lens module 100 includes a first pressing ring 106 , and the bearing portion 142 abuts against the first pressing ring 106 to fix the fourth lens 14 . It can be understood that the convex heights of the third lens 13 , the fourth lens 14 and the fifth lens 15 increase in sequence, which results in that the fifth lens 15 cannot directly abut against the fourth lens 14 during the installation of the fourth lens 14 . A first pressure ring 106 is arranged between the fourth lens 14 and the fifth lens 15 to facilitate the fixing of the fourth lens 14 and improve the stability of the lens module 100 .

Referring to FIG. 1 , in an optional embodiment, the lens module 100 includes a second pressing ring 107 , and the second pressing ring 107 of the fifth lens 15 abuts to fix the fifth lens 15 . It can be understood that, the second pressing ring 107 is fixedly connected with the lens barrel 20 by dispensing glue. In order to make the bonding between the second pressing ring 107 and the lens barrel 20 more firm, a glue dispensing groove 202 for accommodating glue is provided between the second pressing ring 107 and the lens barrel 20 . Please refer to FIG. 6 , for example, the structure of a glue dispensing groove 202 is as follows: the edge of the second pressing ring 107 is provided with a notch 1071 , the inner surface of the lens barrel 20 is provided with a groove 218 , and the notch 1071 and the groove 218 form the above point Glue tank 202.

Referring to FIG. 4 , in an optional embodiment, the lens barrel 20 includes a first installation groove 211 , a second installation groove 212 , a third installation groove 213 , a fourth installation groove 214 , and a fifth installation groove 211 , a second installation groove 212 , a fourth installation groove 214 , and a fifth installation groove. Slot 215 , sixth installation slot 216 and seventh installation slot 217 . The fourth mounting groove 214 is formed by being surrounded by the second abutting surface 2102 and the third abutting surface 2103 .

It can be understood that due to the performance and structural requirements of the lens module 100 , the diameter of the fourth lens 14 is quite different from the diameter of the third lens 13 , and the inner diameter of the fourth installation groove 214 is different from the inner diameter of the third installation groove 213 . larger.

It can be understood that, in the lens module 100 provided in the embodiment of the present application, the first lens 11 is installed in the first installation groove 211, the second lens 12 is installed in the second installation groove 212, and the third lens 13 is installed in the second installation groove 212. In the third installation groove 213, the fourth lens 14 is installed in the fourth installation groove 214, the first pressure ring 106 is installed in the fifth installation groove 215, the fifth lens 15 is installed in the sixth installation groove 216, and the second pressure ring 106 is installed in the fifth installation groove 215. The ring 107 is installed in the seventh installation groove 217 .

It can be understood that the entire first lens 11 is convex, and the end of the lens barrel 20 facing the object side is further provided with a light-passing hole 221 communicating with the first installation groove 211 , and the first lens 11 is at least partially penetrated through the light-passing hole 221 . hole 221.

It can be understood that, the end of the light-transmitting hole 221 facing the object side is provided with a funnel-shaped reflecting portion 2211 to increase the light entering the first lens 11 .

Referring to FIG. 1 , in an optional embodiment, the lens module 100 includes a third shading sheet 103 , and two sides of the third shading sheet 103 are respectively abutted with the first lens 11 and the second lens 12 .

Referring to FIG. 1 , in an optional embodiment, the lens module 100 includes a fourth shading sheet 104, and both sides of the fourth shading sheet 104 are respectively abutted with the second lens 12 and the third lens 13;

Referring to FIG. 1 , in an optional embodiment, the lens module 100 includes a fifth shading sheet 105 , and two sides of the fifth shading sheet 105 are respectively abutted with the second pressing ring 107 and the fifth lens 15 .

It can be understood that the arrangement of the first shading sheet 101, the second shading sheet 102, the third shading sheet 103, the fourth shading sheet 104 and the fifth shading sheet 105 can, on the one hand, block and filter the light entering the lens, and on the other hand, can block and filter the light entering the lens. The aspect can also buffer the extrusion and impact between the lenses, between the lenses and the lens barrel 20, and between the lenses and the pressure ring.

In an optional embodiment, the first light-shielding sheet 101 and the second light-shielding sheet 102 are both hollow and annular, and the outer diameter of the first light-shielding sheet 101 is equal to the outer diameter of the second light-shielding sheet 102 . The inner diameter of the second shading sheet 102 is smaller than the inner diameter of the second shading sheet 102 , and the inner diameter of the second shading sheet 102 is larger than the outer diameter of the third lens 13 .

It can be understood that when the lens module 100 is accurately assembled, the distance between the fourth lens 14 and the third abutting surface 2103 is approximately equal to the sum of the thicknesses of the first shading sheet 101 and the second shading sheet 102, and the fourth lens The distance between 14 and the third lens 13 is approximately equal to the thickness of the first light shielding sheet 101 . At this time, the pressure of the bearing portion 142 in the fourth lens 14 is transmitted to the lens barrel 20 and the third lens 13 by the first shading plate 101 and the second shading plate 102, so as to prevent the deformation of the fourth lens 14 from being too large and reducing the assembling capacity of the lens module 100. Yield.

A second aspect of the embodiments of the present application provides a camera device, and the camera device may be a mobile phone, a digital camera, a tablet computer, or the like; specifically, the camera device includes the lens module 100 as described above.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The above disclosure provides many different implementations or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described above. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described or exemplified is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims

A lens module, comprising a lens barrel and a lens group, wherein the lens group is installed in the lens barrel, wherein the lens group includes a first lens and a second lens that are stacked in sequence from the object side to the image side , a third lens and a fourth lens; the lens barrel includes a barrel wall fixed with the lens group, a top wall bent and extended from the barrel wall to be fixed on the object side of the first lens, and a top wall from the top One end of the wall away from the cylindrical wall is bent and extended toward the object side and has a bent wall with a light-passing hole, the bent wall is formed to enclose a accommodating space, and the first lens part is accommodated in the accommodating space;

Wherein, the barrel wall includes a first abutting surface abutting on the peripheral side of the third lens, a second abutting surface abutting on the peripheral side of the fourth lens, and connecting the first abutting surface and the peripheral side of the fourth lens. The third abutting surface of the second abutting surface is in contact with the object side of the fourth lens; the lens module further includes a A first shading sheet, the first shading sheet includes a first shading portion sandwiched between the third lens and the fourth lens, and extending from the first shading portion to sandwiched between the third lens a second shading part between the abutting surface and the fourth lens; the lens module further includes a second shading plate sandwiched between the second shading part and the third abutting surface, so The second light-shielding sheet is arranged on the peripheral side of the third lens at intervals.
The lens module according to claim 1, wherein the fourth lens comprises an optical part for imaging and a carrying part surrounding the optical part, and the first light shielding part is sandwiched between the carrying part and the third lens.
The lens module according to claim 2, wherein the optical part comprises a first optical part located in a middle position and a second optical part surrounding the first optical part, the image of the first optical part is The side surface is convex toward the image side to form a convex portion, and the object side surface of the second optical portion is concave toward the image side to form a concave portion.
The lens module according to claim 1, wherein the first lens comprises a first surface close to the object side, a second surface facing the bending wall, and a third surface abutting against the top wall , the third surface and the first surface are both connected to the second surface.
The lens module according to claim 2, wherein the lens module comprises a first pressing ring, and the bearing portion abuts with the first pressing ring to fix the fourth lens.
The lens module according to claim 5, wherein the lens group comprises a fifth lens, the lens module comprises a second pressure ring; the fifth lens is located on the image side of the fourth lens; The second pressing ring is in contact with the fifth lens to fix the fifth lens.
The lens module according to claim 6, wherein the lens barrel comprises a first installation groove, a second installation groove, a third installation groove, a fourth installation groove, a fifth installation groove, a sixth installation groove and a seventh installation groove, the light-passing hole communicates with the first installation groove; the second abutting surface and the third abutting surface are surrounded to form the fourth installation groove;

The first lens is installed in the first installation groove, the second lens is installed in the second installation groove, the third lens is installed in the third installation groove, and the first lens is installed in the third installation groove. Four lenses are installed in the fourth installation groove, the first pressure ring is installed in the fifth installation groove, the fifth lens is installed in the sixth installation groove, and the second pressure ring is installed in the seventh installation groove.
The lens module according to claim 6, wherein the lens module comprises a third shading sheet, and two sides of the third shading sheet are respectively in contact with the first lens and the second lens;

And/or, the lens module includes a fourth shading sheet, and both sides of the fourth shading sheet are respectively abutted with the second lens and the third lens;

And/or, the lens module includes a fifth shading sheet, and two sides of the fifth shading sheet are respectively abutted with the second pressing ring and the fifth lens.
The lens module according to claim 1, wherein, during the assembly process of the lens module, the deformation range of the second light shielding plate is 1 micrometer to 2 micrometers.
A camera device, characterized by comprising the lens module according to any one of claims 1-9.