Lens module

Abstract

The invention relates to the technical field of camera shooting, and discloses a lens module which comprises a protection lens assembly and a lens assembly. The protective lens assembly comprises a rotary cover, an elastic sheet and a protective lens, the rotary cover is of an annular structure and comprises an inner side wall, a bearing table protrudes out of the lower end of the inner side wall, and the elastic sheet is fixed to the bearing table and protrudes out of the bearing table in the optical axis direction. The lens assembly comprises a lens barrel and an optical lens arranged in the lens barrel, first bosses and second bosses which are arranged in parallel protrude from the outer wall surface of the lens barrel, mounting gaps are formed between the second bosses and the first bosses in the optical axis direction, and limiting grooves extending in the radial direction are formed in the outer wall surfaces of the second bosses. Wherein the bearing table is arranged in the mounting gap and abuts against the first boss, and at least part of the elastic piece is located in the limiting groove and abuts against the second boss, so that the protection lens is detachably connected to the lens assembly through the screw cap, the protection lens is more convenient to disassemble, and the protection lens cannot be abraded.

Description

Technical Field

[0001] This invention relates to the field of camera technology, specifically to a lens module. Background Technology

[0002] With the continuous development and progress of technology and people's growing demand for recording their rich lives, the demand for panoramic cameras, action cameras and drones is increasing, and the requirements for lenses used in these products are becoming more and more stringent.

[0003] The outermost protective lens of such lenses is usually exposed to the environment. During use, it is unavoidable that the protective lens will be bumped and scratched, and the worn protective lens needs to be replaced in time. The existing protective lens is usually pressed directly onto the lens barrel by a screw cap. The screw cap and the lens barrel are connected by threads. The following problems will occur when replacing the protective lens: (1) When replacing the protective lens, the user needs to adjust the position of the protective lens and the lens barrel. The user will touch the side of the protective lens many times. After the screw cap is closed, it is impossible to wipe away the fingerprints, sweat or dust on the side. In severe cases, it will affect the lens image. (2) The screw cap and the lens barrel are connected by threads. After repeated replacements, the threads will wear out, which will lead to unstable installation or poor precision of the protective lens. (3) Since the protective lens is pressed directly onto the lens barrel by the screw cap, the user cannot ensure that the tightening force is appropriate when replacing it. There will be cases where excessive force is used and the protective lens is damaged. Summary of the Invention

[0004] This invention discloses a lens module, the purpose of which is to at least solve one of the technical problems existing in the prior art.

[0005] This invention provides a lens module having an optical axis, including a protective lens assembly and a lens assembly. The protective lens assembly is rotatably mounted on the lens assembly around the optical axis. The protective lens assembly includes a screw cap, an elastic sheet, and a protective lens. The screw cap has an annular structure and includes an inner sidewall. A support platform protrudes from the lower end of the inner sidewall. The elastic sheet is fixed to the support platform and protrudes from the support platform in the optical axis direction. The protective lens is fixed to the inner sidewall and located above the elastic sheet. The lens assembly includes a lens barrel and a lens disposed within the lens barrel. The optical lens has a first protrusion and a second protrusion arranged in parallel on the outer wall surface of the lens barrel. There are multiple second protrusions, and the multiple second protrusions are spaced apart in the direction around the optical axis. The multiple second protrusions and the first protrusion have an installation gap in the direction of the optical axis. The outer wall surface of the second protrusion is provided with a limiting groove extending radially, where radial means perpendicular to the optical axis. The support platform is disposed in the installation gap and abuts against the first protrusion. The elastic sheet is at least partially located in the limiting groove and abuts against the second protrusion.

[0006] Furthermore, the surface of the support platform facing the second protrusion has a placement groove extending along the optical axis, and the elastic sheet has a protrusion in the middle. The elastic sheet is disposed in the placement groove and the protrusion protrudes out of the placement groove, wherein the protrusion extends into the limiting groove.

[0007] Furthermore, in the direction around the optical axis, the length of the limiting groove is the same as the length of the protrusion, and the two wall surfaces opposite to the limiting groove of the protrusion abut against each other.

[0008] Furthermore, a limiting post is provided within the installation gap, and the limiting post is located on the side of the second protrusion away from the limiting groove, with the end face of the bearing platform abutting against the limiting post.

[0009] Furthermore, in the direction around the optical axis, the length of the limiting groove is greater than the length of the protrusion, and the protrusion abuts against one wall of the limiting groove.

[0010] Furthermore, the end face of the second protrusion away from the limiting post is a first inclined surface, and the first inclined surface faces the screw cap.

[0011] Furthermore, the protective lens assembly also includes a baffle, one end of which is glued to the support platform, and the other end of which abuts against both sides of the protrusion along the optical axis.

[0012] Furthermore, there are multiple support platforms, and each of the multiple support platforms and the multiple second protrusions is arranged in a one-to-one correspondence along the optical axis direction.

[0013] Furthermore, the protective lens assembly also includes an annular spacer, which is threadedly connected to the inner wall of the screw cap, and the protective lens is adhered to the annular spacer.

[0014] Furthermore, the lens barrel includes a first barrel and a second barrel distributed along the optical axis, the first barrel and the second barrel being connected by threads, and the optical lens being disposed inside both the first barrel and the second barrel.

[0015] Furthermore, the outer wall of the screw cap is provided with a first colored marking point, and the outer wall of the lens barrel is provided with a second colored marking point. The first marking point and the second marking point are used for the alignment and assembly of the screw cap and the lens barrel. Attached Figure Description

[0016] Figure 1 An exploded view of the lens module provided in the embodiments of this application;

[0017] Figure 2 This is an assembly cross-sectional view of the lens module provided in an embodiment of this application;

[0018] Figure 3 A schematic diagram of the screw cap, elastic sheet, and baffle provided in an embodiment of this application;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0020] Figure 5 This is a schematic diagram of the lens assembly provided in an embodiment of this application;

[0021] Figure 6 This is a top view of the screw cap, elastic sheet, and lens barrel assembled according to an embodiment of this application. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The lens module provided in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 and Figure 2 As shown, this invention provides a lens module with an optical axis o. The lens module includes a protective lens assembly 10 and a lens assembly 20. The protective lens assembly 10 is rotatably mounted on the lens assembly 20 around the optical axis o, allowing the protective lens assembly 10 to be detachably connected to the lens assembly 20. The protective lens assembly 10 protects the lens assembly 20 and can be replaced when it becomes worn. The lens module is a rotating structure that rotates around the optical axis o, and the protective lens assembly 10 is mounted on the lens assembly 20 along the optical axis o, ensuring precise alignment of the two on the optical axis o.

[0027] For details, please refer to Figures 1 to 4As shown, the protective lens assembly 10 includes a screw cap 1, an elastic piece 2, and a protective lens 3. The screw cap 1 has an annular structure and includes an inner wall 11, which encloses a receiving through hole (not shown in the figure). The protective lens 3 and the elastic piece 2 are both disposed within the receiving through hole. A support platform 12 protrudes from the lower end of the inner wall 11. The elastic piece 2 is fixed to the support platform 12 and protrudes from the support platform 12 in the optical axis o direction. The protective lens 3 is fixed to the inner wall 11 and is located above the elastic piece 2. That is, by providing a support platform 12 at the bottom of the inner wall 11 of the lens barrel 6 for mounting and fixing the elastic piece 2, the installation stability of the elastic piece 2 is ensured, and it also facilitates alignment and assembly with the lens assembly 20 using the support platform 12. The protective lens 3 is positioned above the elastic piece 2 along the optical axis o, so that the protective lens 3 and the elastic piece 2 are misaligned in the optical axis o direction, preventing the elastic piece 2 from affecting the installation of the protective lens 3 in the optical axis o direction. The support platform 12 is a flat plate structure protruding from the inner wall 11, which ensures the stable installation of the elastic sheet 2 and makes the screw cap 1 easy to rotate on the lens barrel 6. The elastic sheet 2 is a sheet-like structure that can deform in the direction of the optical axis o, and its material can be plastic or metal.

[0028] Furthermore, combined with Figure 5 and Figure 6 As shown, the lens assembly 20 includes a lens barrel 6 and an optical lens 7 disposed within the lens barrel 6. The optical lens 7 is used to adjust the light from the protective lens 3 to ensure that the lens module can achieve high-definition imaging. The outer wall surface of the lens barrel 6 has parallel first protrusions 61 and second protrusions 62. There are multiple second protrusions 62, and these protrusions are spaced apart in the direction around the optical axis o. The multiple second protrusions 62 and the first protrusions 61 have a mounting gap 63 in the direction of the optical axis o. That is, the first protrusions 61 and the second protrusions 62 are arranged parallel in the direction of the optical axis o to ensure that the support platform 12 can rotate within the mounting gap 63 between the first protrusions 61 and the second protrusions 62. The lens barrel 6 is an annular structure that rotates around the optical axis o. The outer wall surface of the lens barrel 6 refers to the annular outer surface of the lens barrel 6 away from the optical axis o. Preferably, the first protrusion 61 is a complete annular structure, and both the first protrusion 61 and the second protrusion 62 are flat plate structures. Multiple second protrusions 62 are arranged at intervals in the direction around the optical axis o, ensuring that the support platform 12 on the protective lens assembly 10 can contact and abut against the first protrusion 61 through the gap between adjacent second protrusions 62, that is, ensuring that the protective lens assembly 10 can be aligned and assembled onto the first protrusion 61 of the lens assembly 20 in the direction of the optical axis o. Preferably, along the optical axis o, the second protrusions 62 are closer to the protective lens 3 than the first protrusions 61.

[0029] The outer wall of the second protrusion 62 is provided with a radially extending limiting groove 621, that is, the limiting groove 621 is a groove extending radially. It should be noted that radial refers to the direction perpendicular to the optical axis o, which is the diameter direction of the protective lens 3. The support platform 12 is disposed within the mounting gap 63 and abuts against the first protrusion 61. The elastic piece 2 is at least partially located within the limiting groove 621 and abuts against the second protrusion 62, that is, the elastic piece 2 extends into the limiting groove 621 and abuts against the second protrusion 62. In this design, by rotating the support platform 12 into the mounting gap 63 between the first protrusion 61 and the second protrusion 62, the first protrusion 61 abuts against and locks the support platform 12 to move in the optical axis o direction, thereby limiting the protective lens assembly 10 in the optical axis o direction. Furthermore, by abutting the elastic piece 2 on the protective lens assembly 10 against the limiting groove 621 on the lens barrel 6, and by using the elastic piece 2 to restrict the rotation of the second protrusion 62 and the support platform 12, the rotation of the protective lens assembly 10 around the optical axis o is restricted. It can be understood that after the protective lens assembly 10 and the lens assembly 20 are assembled, if it is necessary to replace the protective lens 3, simply increase the force in the opposite direction to tighten the protective lens assembly 10. Applying a certain force will cause the elastic piece 2 to deform and disengage from the limiting groove 621, and further tightening will cause the support platform 12 to misalign with the second protrusion 62 in the optical axis o direction, thus allowing the protective lens assembly 10 to detach from the lens assembly 20, thereby enabling the replacement of the protective lens 3. In other words, the detachable connection of the protective lens 3 of the lens module is achieved through the support platform 12 in conjunction with the first protrusion 61 and the second protrusion 62, and the elastic piece 2 in conjunction with the limiting groove 621. The protective lens 3 is mounted on the screw cap 1 and detachably connected to the lens barrel 6 via the screw cap 1. This prevents the user from touching the protective lens 3 when replacing it, thus avoiding contamination. Simultaneously, mounting the protective lens 3 on the screw cap 1 increases the gripping points for the protective lens 3, facilitating manual replacement and improving ease of use. The limiting mechanism between the protective lens assembly 10 and the lens assembly 20 is achieved through the contact between the support platform 12 and the first protrusion 61 and the second protrusion 62 along the optical axis o, and the limiting mechanism of the elastic sheet 2 and the limiting groove 621 along the rotational direction around the optical axis o. This avoids using threaded connections, improving the installation stability and replacement lifespan of the protective lens 3, making the detachable lens module more durable. Furthermore, mounting the protective lens 3 on the screw cap 1 prevents pressure on the protective lens 3 along the optical axis o during replacement, thus avoiding damage. It is understandable that the support platform 12 is set in the installation gap 63, the support platform 12 is supported by the first boss 61, and the second boss 63 or the elastic sheet 2 can be used to abut the surface of the support platform 12 away from the first boss 61, thereby realizing the upper limit of the support platform 12 in the optical axis o direction.

[0030] In one embodiment, such as Figure 3 , Figure 4 and Figure 6 As shown, the surface of the support platform 12 facing the second protrusion 62 has a placement groove 121 extending along the optical axis o. The elastic piece 2 includes a protrusion 21 in the middle. The elastic piece 2 is disposed in the placement groove 121, and the protrusion 21 protrudes from the placement groove 121 in the optical axis o direction and extends into the limiting groove 621. It can be understood that the elastic piece 2 includes a body and a protrusion 21 disposed in the middle of the body. The protrusion 21 protrudes from the body in the optical axis o direction and can protrude from the placement groove 121 and extend into the limiting groove 621 to limit the rotation between the second protrusion 62 and the support platform 12. By providing the placement groove 121 on the support platform 12, it is convenient to position and assemble the elastic piece 2 onto the support platform 12, and at the same time, the placement groove 121 can play a limiting role for the elastic piece 2. Preferably, the projection of the elastic sheet 2 along the optical axis o is a U-shaped structure, wherein the protrusion 21 is a structure that protrudes from the middle position of the elastic sheet 2, so that the protrusion 21 that cooperates with the limiting groove 621 only needs to be set in the middle of the elastic sheet 2, saving the material of the elastic sheet 2, and also making it easier to set the protrusion 21 in the limiting groove 621 and form a limiting abutment with the second boss 62.

[0031] In one embodiment, the length of the limiting groove 621 is the same as the length of the protrusion 21 in the direction around the optical axis o. The two opposing walls of the protrusion 21 abut against the limiting groove 621, thus limiting the protrusion 21 by the two walls of the limiting groove 621. The two walls of the protrusion 21 abut against the limiting groove 621 in the direction around the optical axis o, thereby limiting the rotation of the protective lens assembly 10. It should be noted that both the screw cap 1 and the lens barrel 6 are annular structures, which is the circumferential direction of the screw cap 1 and the lens barrel 6 in the direction around the optical axis o.

[0032] In one embodiment, such as Figure 5 As shown, a limiting post 64 is provided within the mounting gap 63, and the limiting post 64 is located on the side of the second protrusion 62 away from the limiting groove 621. The end face of the support platform 12 abuts against the limiting post 64. By providing the limiting post 64 within the mounting gap 63, the movement of the support platform 12 within the mounting gap 63 can be prevented, that is, the rotation of the protective lens assembly 10 relative to the lens assembly 20 in the direction about the optical axis o is restricted. It should be noted that when assembling the protective lens assembly 10 into the lens assembly 20, the support platform 12 rotates into the mounting gap 63 from the side of the second protrusion 62 near the limiting groove 621. In order to better restrict the rotation path of the support platform 12 and prevent the user from using excessive force to unscrew the protrusion 21 that has just entered the limiting groove 621 out of the limiting groove 621, the limiting post 64 is provided on the side of the second protrusion 62 away from the limiting groove 621 to abut and restrict the rotation of the support platform 12.

[0033] Furthermore, such as Figure 6 As shown, in the direction around the optical axis o, the length of the limiting groove 621 is greater than the length of the protrusion 21, and the protrusion 21 abuts against one wall of the limiting groove 621. Since the limiting post 64 can limit one side of the support platform 12, in order to restrict the movement of the elastic piece 2 in the direction around the optical axis o, it is only necessary to ensure that the protrusion 21 enters the limiting groove 621 and abuts against one wall of the limiting groove 621 away from the limiting post 64, which can achieve the rotational limitation of the elastic piece 2. By designing the length of the limiting groove 621 to be greater than the length of the protrusion 21, the protrusion 21 can deform within the limiting groove 621 when the compressive force is too large, avoiding excessive compression of the elastic piece 2 and affecting its service life.

[0034] In one embodiment, such as Figure 5 As shown, the end face of the second protrusion 62 away from the limiting post 64 is a first inclined surface 622, which faces the cap 1. By setting the end face of the second protrusion 62 facing the cap 1 as the first inclined surface 622, the rotation of the cap 1 on the lens barrel 6 is guided, making it easier for the elastic sheet 2 to be squeezed and deformed by the second protrusion 62 when the support platform 12 just enters the installation gap 63.

[0035] In one embodiment, such as Figure 4 As shown, the protective lens assembly 10 also includes a baffle 4. One end of the baffle 4 is glued to the support platform 12, and the other end of the baffle 4 abuts against both sides of the protrusion 21 along the optical axis o. That is, the baffle 4 limits and fixes the elastic sheet 2 in the optical axis o direction, preventing the elastic sheet 2 from falling off the placement groove 121 of the support platform 12 during installation and after deformation.

[0036] In one embodiment, there are multiple support platforms 12, and the multiple support platforms 12 and multiple second protrusions 62 are arranged one-to-one in the optical axis o direction to ensure that the protective lens assembly 10 and the lens assembly 20 are subjected to more uniform force and to prevent the protective lens assembly 10 and the lens assembly 20 from tilting. Preferably, there can be two support platforms 12 and two second protrusions 62, and of course, there can also be two elastic sheets 2.

[0037] In one embodiment, such as Figure 1As shown, the protective lens assembly 10 also includes an annular spacer 5, which is threadedly connected to the inner wall 11 of the cap 1. The protective lens 3 is adhered to the annular spacer 5. To improve the installation stability and convenience of the protective lens 3 and the cap 1, an annular spacer 5 is added between them. The protective lens 3 is fixed to the annular spacer 5 by adhesive, which reduces the installation difficulty of the protective lens 3. At the same time, the annular spacer 5 is fixed to the spacer by a threaded connection, allowing the protective lens 3 to be flexibly removed from the spacer, so that users can replace different types of protective lenses 3 as needed. In addition, considering that the cap 1 is mainly made of metal, the precision of assembling the protective lens 3 in a metal cap 1 is insufficient. Therefore, an annular spacer 5, which can be integrally molded from plastic, is provided for assembling the protective lens 3.

[0038] In one embodiment, such as Figure 2 As shown, the lens barrel 6 includes a first barrel 66 and a second barrel 67 distributed along the optical axis o. The first barrel 66 and the second barrel 67 are connected by threads, and optical lenses 7 are disposed inside both the first barrel 66 and the second barrel 67. The lens barrel 6 adopts a split structure, which allows the position of the optical lenses 7 inside the lens barrel 6 to be slightly adjusted along the optical axis o, thereby realizing the focusing of the lens module.

[0039] In one embodiment, please refer to Figure 3 and Figure 5 As shown, the outer wall of the screw cap 1 is provided with a colored first marking point 13, and the outer wall of the lens barrel 6 is provided with a colored second marking point 65. The first marking point 13 and the second marking point 65 are used for the alignment and assembly of the screw cap 1 and the lens barrel 6. By providing the first marking point 13 on the screw cap 1 and the second marking point 65 on the lens barrel 6, when assembling the protective lens assembly 10 with the lens assembly 20, the first marking point 13 and the second marking point 65 are aligned along the optical axis o, so that the support platform 12 can be better aligned with the gap between the adjacent second protrusions 62. Then, the support platform 12 is placed on the first protrusion 61, and finally the screw cap 1 is rotated in the direction around the optical axis o, thereby completing the assembly of the lens assembly 10 and the lens assembly 20 in the rotation direction around the optical axis o.

[0040] To facilitate understanding of this application, the assembly and disassembly of the protective lens assembly and lens assembly will be explained below.

[0041] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A lens module having an optical axis, characterized in that, include: A protective lens assembly and a lens assembly, wherein the protective lens assembly is rotatably mounted on the lens assembly about the optical axis; The protective lens assembly includes a screw cap, an elastic sheet, and a protective lens. The screw cap has an annular structure and includes an inner sidewall. A support platform protrudes from the lower end of the inner sidewall. The elastic sheet is fixed to the support platform and protrudes from the support platform in the optical axis direction. The protective lens is fixed to the inner sidewall and located above the elastic sheet. The lens assembly includes a lens barrel and an optical lens disposed within the lens barrel. The outer wall surface of the lens barrel has parallel first and second protrusions. There are multiple second protrusions, and the multiple second protrusions are spaced apart in the direction around the optical axis. The multiple second protrusions and the first protrusion have an installation gap in the direction of the optical axis. The outer wall surface of the second protrusion is provided with a limiting groove extending radially, where radial means perpendicular to the optical axis. The support platform is disposed within the installation gap and abuts against the first boss, and the elastic sheet is at least partially located within the limiting groove and abuts against the second boss.

2. The lens module according to claim 1, characterized in that, The surface of the support platform facing the second protrusion has a placement groove extending along the optical axis. The elastic sheet has a protrusion in the middle. The elastic sheet is disposed in the placement groove and the protrusion protrudes from the placement groove in the optical axis direction. The protrusion extends into the limiting groove.

3. The lens module according to claim 2, characterized in that, In the direction around the optical axis, the length of the limiting groove is the same as the length of the protrusion, and the two opposite walls of the protrusion and the limiting groove abut against each other.

4. The lens module according to claim 2, characterized in that, A limiting post is provided within the installation gap, and the limiting post is located on the side of the second protrusion away from the limiting groove, with the end face of the bearing platform abutting against the limiting post.

5. The lens module according to claim 4, characterized in that, In the direction about the optical axis, the length of the limiting groove is greater than the length of the protrusion, and the protrusion abuts against one wall of the limiting groove.

6. The lens module according to claim 4, characterized in that, The end face of the second protrusion away from the limiting post is a first inclined surface, which faces the screw cap.

7. The lens module according to claim 2, characterized in that, The protective lens assembly also includes a baffle, one end of which is glued to the support platform, and the other end of which abuts against both sides of the protrusion along the optical axis.

8. The lens module according to claim 1, characterized in that, The number of the support platforms is multiple, and the multiple support platforms and the multiple second protrusions are arranged one-to-one in the optical axis direction.

9. The lens module according to claim 1, characterized in that, The protective lens assembly also includes an annular spacer, which is threadedly connected to the inner wall of the screw cap, and the protective lens is adhered to the annular spacer.

10. The lens module according to claim 1, characterized in that, The lens barrel includes a first barrel and a second barrel distributed along the optical axis. The first barrel and the second barrel are connected by threads, and the optical lens is disposed inside both the first barrel and the second barrel.

11. The lens module according to claim 1, characterized in that, The outer wall of the screw cap is provided with a first colored mark, and the outer wall of the lens barrel is provided with a second colored mark. The first mark and the second mark are used for the alignment and assembly of the screw cap and the lens barrel.

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