A lens module

Abstract

The present invention relates to the technical field of optical lenses, and discloses a lens module. The lens module includes a main lens frame assembly and an adjustment lens frame assembly. The main lens frame assembly includes a main lens frame body, and a first lens and a lens group are disposed in the main lens frame body at intervals along the axial direction of the main lens frame body. The adjustment lens frame assembly is disposed in the main lens frame assembly and includes an adjustment lens frame body and an adjustment lens. The adjustment lens frame body includes an adjustment plane and at least three adjustment claws disposed circumferentially on the adjustment plane. The adjustment plane is disposed between the first lens and the lens group, and the adjustment lens is disposed on the adjustment plane. The at least three adjustment claws are configured to be able to adjust the position of the adjustment lens relative to the lens group. The structure of the adjustment lens frame assembly of the present invention is simple, easy to process, and convenient to adjust, effectively ensuring that the adjusted lens module can meet the design tolerances, and at the same time having good imaging quality and qualification rate.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and particularly to a lens module. Background Art

[0002] With the increasing development of the social security system, the replacement speed of security products has gradually accelerated, and the design requirements for optical lenses have become increasingly strict. Ordinary high-definition image-quality lenses are gradually replaced by lenses with high image quality and large light apertures.

[0003] Due to the high requirements for the optical system of lenses with large light apertures, the assembly tolerances such as lens spacing, eccentricity, and tilt are sensitive, and general processing capabilities cannot meet their design requirements, resulting in many problems such as poor quality of lens products, low qualification rate, and high cost. Therefore, how to adjust the internal structure of the lens to meet the requirements of high-quality optical systems has become an urgent task in lens structure design.

[0004] Therefore, there is an urgent need for a lens module to solve the above problems. Summary of the Invention

[0005] Based on the above, the purpose of the present invention is to provide a lens module with good quality, easy processing, and high qualification rate.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A lens module, comprising:

[0008] A main frame assembly, including a main frame body, a first lens and a lens group disposed in the main frame body and spaced along the axial direction of the main frame body;

[0009] An adjustment frame assembly, disposed in the main frame assembly, including an adjustment frame body and an adjustment lens. The adjustment frame body includes an adjustment plane and at least three adjustment claws disposed circumferentially on the adjustment plane. The adjustment plane is disposed between the first lens and the lens group, the adjustment lens is disposed on the adjustment plane, and at least three of the adjustment claws are configured to be able to adjust the position of the adjustment lens relative to the lens group.

[0010] As a preferred solution of the lens module, an adjustment groove is provided on the outer side of the main frame body, and at least part of the adjustment claws are disposed in the adjustment groove.

[0011] As a preferred solution of the lens module, an adjustment end is provided at one end of the adjustment claw away from the adjustment plane, and the adjustment end protrudes outward in the radial direction of the adjustment lens in the adjustment groove.

[0012] As a preferred solution of the lens module, an adjustment gap is provided between the outer wall of the adjustment claw and the inner wall of the main frame body.

[0013] As a preferred solution of the lens module, a first installation groove is provided between adjacent adjusting claws, and a first installation protrusion is provided on the inner wall of the main lens frame body. The first installation protrusion can be placed in the first installation groove.

[0014] As a preferred solution of the lens module, the adjusting lens and the adjusting claw are connected by a cured glue.

[0015] As a preferred solution of the lens module, a glue receiving groove is provided between the adjusting claw and the adjusting lens.

[0016] As a preferred solution of the lens module, a first installation step is provided on the inner side wall of the main lens frame body. The first lens is placed on the first installation step, and the first lens and the adjusting lens are arranged with a gap.

[0017] As a preferred solution of the lens module, a second installation step is provided at one end of the main lens frame body away from the first lens. The lens group is placed on the second installation step;

[0018] A third installation step is provided between the first installation step and the second installation step. The adjusting lens frame assembly is placed on the third installation step.

[0019] As a preferred solution of the lens module, an adjusting positioning groove extending along the radial direction is provided on the outer periphery of the main lens frame body.

[0020] The beneficial effects of the present invention are as follows:

[0021] In the present invention, an adjusting lens frame assembly is provided in the main lens frame assembly. The adjusting lens frame assembly includes an adjusting plane provided between the first lens and the lens group. The adjusting lens is placed on the adjusting plane. At least three adjusting claws in the circumferential direction of the adjusting plane are used to adjust the position of the adjusting lens relative to the adjusting plane, so as to realize the adjustment of the position of the adjusting lens relative to the lens group. By adjusting the position of the adjusting lens relative to the lens group, the best imaging state of the lens group is realized; the structure of the adjusting lens frame assembly is simple, easy to process, and convenient to adjust, effectively ensuring that the adjusted lens module can meet the design tolerances, and at the same time having good imaging quality and qualification rate. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the content of the embodiments of the present invention and these drawings without creative efforts.

[0023] Figure 1 It is a schematic diagram of the lens module provided by the specific embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the main frame body of the lens module provided by the specific embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the adjustment frame body of the lens module provided by the specific embodiment of the present invention;

[0026] Figure 4 It is a cross-sectional view of the lens module provided by the specific embodiment of the present invention.

[0027] In the figure:

[0028] 1. Main frame assembly; 11. Main frame body; 111. Adjustment groove; 112. First mounting protrusion; 113. First mounting step; 114. Second mounting step; 115. Third mounting step; 116. Adjustment positioning groove; 117. Female head interface; 12. First lens; 13. Lens group;

[0029] 2. Adjustment frame assembly; 21. Adjustment frame body; 211. Adjustment plane; 212. Adjustment claw; 2121. Adjustment end; 2122. Adjustment gap; 2123. First mounting groove; 2124. Glue storage groove; 22. Adjustment lens. Specific embodiment

[0030] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0031] As Figures 1 - 4 shown, this embodiment provides a lens module, which includes a main frame assembly 1 and an adjustment frame assembly 2. The main frame assembly 1 includes a main frame body 11, and a first lens 12 and a lens group 13 are arranged in the main frame body 11 at intervals along the axial direction of the main frame body 11; the adjustment frame assembly 2 is arranged in the main frame assembly 1 and includes an adjustment frame body 21 and an adjustment lens 22. The adjustment frame body 21 includes an adjustment plane 211 and at least three adjustment claws 212 arranged circumferentially on the adjustment plane 211. The adjustment plane 211 is placed between the first lens 12 and the lens group 13, the adjustment lens 22 is placed on the adjustment plane 211, and at least three adjustment claws 212 are configured to be able to adjust the position of the adjustment lens 22 relative to the lens group 13.

[0032] By arranging an adjustable lens frame assembly 2 inside the main lens frame assembly 1, where the adjustable lens frame assembly 2 includes an adjustment plane 211 disposed between the first lens 12 and the lens group 13, an adjustable lens 22 is placed on the adjustment plane 211, and at least three adjustment claws 212 circumferentially arranged on the adjustment plane 211 are used to adjust the position of the adjustable lens 22 relative to the adjustment plane 211, thereby realizing the adjustment of the position of the adjustable lens 22 relative to the lens group 13. By adjusting the position of the adjustable lens 22 relative to the lens group 13, the optimal imaging state of the lens group 13 is achieved; the structure of the adjustable lens frame assembly 2 is simple, easy to process, and convenient to adjust, effectively ensuring that the adjusted lens module can meet the design tolerances, and at the same time having good imaging quality and qualification rate.

[0033] It should be noted that at least three adjustment claws 212 can adjust the eccentric position, tilt angle, and relative position along the optical axis direction of the lens group 13 of the adjustable lens 22, thereby realizing the optimal imaging state of the lens group 13. Here, an example of setting three adjustment claws 212 will be used for illustration.

[0034] Specifically, to enable the adjustable lens frame assembly 2 to be placed inside the main lens frame assembly 1, a first installation groove 2123 is provided between adjacent adjustment claws 212, and a first installation protrusion 112 is provided on the inner wall of the main lens frame body 11. When the adjustable lens frame body 21 is placed inside the main lens frame body 11, the first installation protrusion 112 is placed inside the first installation groove 2123. By providing the first installation protrusion 112 and the first installation groove 2123, positioning and guiding are provided for the installation of the adjustable lens frame assembly 2.

[0035] Furthermore, to realize the connection between the adjustable lens 22 and the adjustment claws 212, a glue-containing groove 2124 is provided between the adjustment claws 212 and the adjustable lens 22. The glue-containing groove 2124 is used to contain an adhesive for bonding the adjustable lens 22 and the adjustment claws 212.

[0036] In this embodiment, the adjustable lens 22 and the adjustment claws 212 are connected by a cured glue. First, a liquid cured glue is injected into the glue-containing groove 2124, then the position of the adjustable lens 22 is adjusted. After the adjustment is completed, the liquid cured glue is cured, and the adjustable lens 22 is connected to the adjustment claws 212 at the adjusted position.

[0037] As an optional solution for a lens module, to facilitate the operator to adjust the adjustable lens frame assembly 2 placed in the main lens frame body 11, an adjustment groove 111 is provided on the outer side of the main lens frame body 11, and at least a part of the adjustment claws 212 is placed inside the adjustment groove 111. The operator realizes the adjustment of the adjustable lens 22 by operating the part of the adjustment claws 212 placed inside the adjustment groove 111.

[0038] In this embodiment, an adjustment end 2121 is provided at one end of the adjustment claw 212 away from the adjustment plane 211. The adjustment end 2121 protrudes outward in the radial direction of the adjustment lens 22 and is disposed in the adjustment groove 111. By means of the adjustment end 2121 and placing the operation end in the adjustment groove 111 at the same time, an operator can press the adjustment end 2121 through the adjustment groove 111, thereby realizing the adjustment operation of the adjustment lens 22. Optionally, the adjustment ends 2121 of the three adjustment claws 212 are concentrically arranged with the main frame body 11 and have the same diameter as the outer side of the main frame body 11, so as to ensure that the outer side of the main frame body 11 is a complete circumferential surface and improve the overall aesthetics of the lens module.

[0039] Specifically, to avoid interference between the adjustment claw 212 and the inner wall of the main frame body 11 during the adjustment of the adjustment claw 212, an adjustment gap 2122 is provided between the outer wall of the adjustment claw 212 and the inner wall of the main frame body 11. Exemplarily, the adjustment gap 2122 is greater than 0.05 mm. In addition, the setting of the adjustment gap 2122 can not only avoid the interference between the adjustment claw 212 and the inner wall of the main frame body 11, but also facilitate the injection of liquid curing glue into the glue containing groove 2124.

[0040] Further, to avoid interference between the adjustment lens 22 and the first lens 12 during the adjustment of the adjustment claw 212, a first installation step 113 is provided on the inner side wall of the main frame body 11. The first lens 12 is placed on the first installation step 113 to ensure that there is a gap between the first lens 12 and the adjustment lens 22. Exemplarily, this gap can be 0.25 mm. The setting of the gap should also ensure that there is no interference between the adjustment lens 22 and the first lens 12 during the adjustment process.

[0041] In this embodiment, to realize the axial positioning of the lens group 13 and the adjustment frame assembly 2 in the main frame body 11, a second installation step 114 is provided at one end of the main frame body 11 away from the first lens 12. The lens group 13 is placed on the second installation step 114. The lens group 13 includes multiple optical lenses. Each optical lens is sequentially assembled into the main frame body 11 according to the requirements of the optical system and abuts against the second installation step 114. The second installation step 114 is used to support each optical lens of the lens group 13. One optical lens of the lens group 13 away from the second installation step 114 is fixed to the main frame body 11 by circumferential dotting. A third installation step 115 is provided between the first installation step 113 and the second installation step 114. The adjustment frame assembly 2 is placed on the third installation step 115.

[0042] Optionally, an adjustment positioning groove 116 extending along the radial direction is provided on the outer periphery of the main lens frame body 11. The adjustment positioning groove 116 is used to position the direction of the lens module, facilitating that during the adjustment of the lens module, the lens group 13, the adjustment lens frame assembly 2, and the first lens 12 are always at the same angle relative to the main lens frame body 11 during the picking and placing process, so that the adjustment process is more precise and efficient. Exemplarily, three adjustment positioning grooves 116 are provided, and the three adjustment positioning grooves 116 are evenly spaced along the outer periphery of the main lens frame body 11.

[0043] Further, a female head interface 117 is further provided at one end of the main lens frame body 11 away from the adjustment lens frame assembly 2. The female head interface 117 can be a threaded structure, a CS interface, or a non-standard interface. The setting of the female head interface 117 facilitates the installation of the lens module. The lens module can be installed on a security product, a camera, a video camera, or an optical detector through the female head interface 117. Correspondingly, a male head interface matching with the adjustment positioning groove 116 can also be provided at the position connected to the lens module.

[0044] The assembly and adjustment process of the above lens module is as follows: Place the lens group 13 on the second installation step 114 and fix it by dispensing glue; place the adjustment lens 22 on the adjustment plane 211, and place the adjustment lens frame assembly 2 on the first installation step 113; place the first lens 12 on the first installation step 113; inject liquid curing glue into the glue receiving groove 2124 and the first installation step 113; adjust the position of the adjustment lens 22 by pressing the adjustment end 2121 until the best imaging state of the lens group 13 is achieved; cure the liquid curing glue through a UV curing device to fix the adjustment lens 22 and the first lens 12.

[0045] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed 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. Among them, the terms "first position" and "second position" are two different positions.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; 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 communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A lens module, characterized in that, Comprising: A main frame assembly (1), including a main frame body (11), and a first lens (12) and a lens group (13) which are arranged inside the main frame body (11) and spaced along the axial direction of the main frame body (11); An adjustment frame assembly (2), arranged inside the main frame assembly (1), including an adjustment frame body (21) and an adjustment lens (22). The adjustment frame body (21) includes an adjustment plane (211) and at least three adjustment claws (212) arranged circumferentially on the adjustment plane (211). The adjustment plane (211) is placed between the first lens (12) and the lens group (13), and the adjustment lens (22) is placed on the adjustment plane (211). At least three of the adjustment claws (212) are configured to be able to adjust the position of the adjustment lens (22) relative to the lens group (13); An adjustment groove (111) is arranged on the outer side of the main frame body (11), and at least part of the adjustment claw (212) is placed in the adjustment groove (111); One end of the adjustment claw (212) away from the adjustment plane (211) is provided with an adjustment end (2121), and the adjustment end (2121) protrudes outward in the radial direction of the adjustment lens (22) in the adjustment groove (111); pressing the adjustment end (2121) through the adjustment groove (111) to realize the adjustment operation of the adjustment lens (22); An adjustment gap (2122) is arranged between the outer wall of the adjustment claw (212) and the inner wall of the main frame body (11).

2. The lens module according to claim 1, wherein A first installation groove (2123) is arranged between adjacent adjustment claws (212), and a first installation protrusion (112) is arranged on the inner wall of the main frame body (11), and the first installation protrusion (112) can be placed in the first installation groove (2123).

3. The lens module according to claim 1, wherein The adjustment lens (22) and the adjustment claw (212) are connected by curing glue.

4. The lens module according to claim 3, wherein A glue receiving groove (2124) is arranged between the adjustment claw (212) and the adjustment lens (22).

5. The lens module according to claim 1, wherein A first installation step (113) is arranged on the inner side wall of the main frame body (11), the first lens (12) is placed on the first installation step (113), and the first lens (12) and the adjustment lens (22) are arranged with a gap.

6. The lens module according to claim 5, wherein One end of the main frame body (11) away from the first lens (12) is provided with a second installation step (114), and the lens group (13) is placed on the second installation step (114); A third installation step (115) is arranged between the first installation step (113) and the second installation step (114), and the adjustment frame assembly (2) is placed on the third installation step (115).

7. The lens module according to claim 1, wherein An adjustment positioning groove (116) extending radially is arranged on the outer circumference of the main frame body (11).

Images