Lens structure

Abstract

The utility model belongs to the technical field of optical systems, and discloses a lens structure, which comprises a lens frame, a space ring, a front lens and a rear lens, the lens frame is provided with a through hole penetrating along the axis direction of the lens frame, the inner wall of the through hole is provided with an annular limiting part, and the space ring is arranged in the through hole and abuts against the annular limiting part. The space ring protrudes inwards from the inner wall of the annular limiting part along the radial direction of the mirror frame; the front lens is assembled into the through hole from the front end of the frame and abuts against the front end face of the space ring, and the rear lens is assembled into the through hole from the rear end of the frame and abuts against the rear end face of the space ring. According to the lens structure, the space ring is arranged in the through hole, and the front lens and the rear lens are arranged in the through hole and abut against the front end face and the rear end face of the space ring respectively, so that the bearing force of the front lens and the rear lens directly acts on the space ring, the relative inclination amount of the front lens and the rear lens is reduced, and deformation of the lens frame is effectively avoided; and the assembly yield is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical systems, in particular to a lens structure. Background Art

[0002] Due to the limitation of the optical system, the outer diameter of the lens in the middle of some lenses cannot be made larger (such as double convex glass spherical lenses and glass aspherical lenses), which means that the lenses of the lens need to be assembled from both ends of the frame to the through hole during assembly. Since the interval between the front lens group and the rear lens group is small, the thickness of the support part that supports the front lens group and the rear lens group is small. The support part is arranged on the inner wall of the through hole and is integrally formed with the frame. In this structure, the front lens group and the rear lens group are directly supported on the support part, which easily causes the frame to deform, and then causes the front lens group and the rear lens group to be relatively tilted, reducing the assembly yield. Utility Model Content

[0003] The utility model aims to provide a lens structure, which can prevent the lens frame from being deformed and improve the assembly yield.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] Lens structure, including:

[0006] A mirror frame, wherein the mirror frame is provided with a through hole penetrating along the axial direction thereof, and an annular limiting portion is provided on the inner wall of the through hole;

[0007] A spacer ring is disposed in the through hole and abuts against the annular limiting portion, and the spacer ring protrudes inwardly from the inner wall of the annular limiting portion along the radial direction of the lens frame;

[0008] A front lens, disposed in the through hole and abutting against the front end surface of the spacer;

[0009] The rear lens is arranged in the through hole and abuts against the rear end surface of the spacer.

[0010] As an optional solution, the rear end surface of the spacer is provided with an annular avoidance groove, and the edge of the rear lens is aligned with the annular avoidance groove.

[0011] As an optional solution, the depth b of the annular avoidance groove ranges from 0.05 mm to 0.1 mm; the width c of the annular avoidance groove ranges from 0.2 mm to 0.3 mm.

[0012] As an optional solution, the thickness a of the spacer is greater than or equal to 0.4 mm, and ab is greater than or equal to 0.35 mm.

[0013] As an optional solution, the rear lens includes a GM lens and a rear group lens both of which are arranged in the through hole, the outer peripheral surface of the GM lens abuts against the inner wall of the annular limiting portion and simultaneously abuts against the rear end surface of the spacer, and the edge of the GM lens is aligned with the annular avoidance groove, and the outer peripheral surface of the rear group lens abuts against the inner wall of the through hole and simultaneously abuts against the GM lens.

[0014] As an optional solution, a chamfer is provided on a side of the annular limiting portion facing the rear lens group.

[0015] As an optional solution, the spacer is a metal part.

[0016] As an optional solution, the front lens includes a front lens group and a first lens;

[0017] The frame includes a main body and a mounting portion that are connected to each other, the main body is provided with the through hole, the mounting portion is provided with a mounting groove that is connected to the through hole, the front group of lenses is arranged in the through hole and abuts against the front end surface of the spacer, the first lens is arranged in the mounting groove and is connected to the mounting portion through a pressure cover to fix the first lens.

[0018] As an optional solution, the pressing cover includes a connecting portion and an extending portion which are connected to each other, the connecting portion is connected to the mounting portion, and the extending portion is used to abut against the first lens to fix the first lens.

[0019] As an optional solution, a sealing ring is provided between the bottom of the mounting groove and the first lens.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a lens structure, in which a spacer is arranged in a through hole, and both a front lens and a rear lens are arranged in the through hole and respectively abut against the front end face and the rear end face of the spacer, so that the bearing force of the front lens and the rear lens directly acts on the spacer, thereby reducing the relative inclination of the front lens and the rear lens, effectively avoiding deformation of the lens frame, and improving the assembly yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the lens structure provided by an embodiment of the utility model;

[0023] Figure 2 yes Figure 1 A magnified view of the structure at center.

[0024] In the figure:

[0025] 1. Mirror frame; 11. Main body; 111. Annular limiting part; 12. Mounting part;

[0026] 2. Spacer ring; 21. Annular avoidance groove;

[0027] 3. front lens; 31. front lens group; 32. first lens;

[0028] 4. Rear lens; 41. GM lens; 42. Rear lens group;

[0029] 5. gland; 51. connection part; 52. extension part;

[0030] 6. Sealing ring. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0035] like Figure 1-Figure 2As shown, an embodiment of the utility model provides a lens structure, which includes a frame 1, a spacer 2, a front lens 3 and a rear lens 4. The frame 1 is provided with a through hole extending along its axial direction, and an annular limiting portion 111 is provided on the inner wall of the through hole. In order to prevent the front lens 3 and the rear lens 4 from directly abutting against the annular limiting portion 111, the spacer 2 is arranged in the through hole and abuts against the annular limiting portion 111, and the spacer 2 protrudes inwardly from the inner wall of the annular limiting portion 111 along the radial direction of the frame 1; the front lens 3 is assembled into the through hole from the front end of the frame 1 and abuts against the front end surface of the spacer 2, and the rear lens 4 is assembled into the through hole from the rear end of the frame 1 and abuts against the rear end surface of the spacer 2.

[0036] The lens structure is achieved by setting the spacer 2 in the through hole, and the front lens 3 and the rear lens 4 are both set in the through hole and respectively abut the front end face and the rear end face of the spacer 2, so that the bearing force of the front lens 3 and the rear lens 4 directly acts on the spacer 2, thereby reducing the relative inclination of the front lens 3 and the rear lens 4, effectively avoiding deformation of the frame 1, and improving the assembly yield.

[0037] In this embodiment, the rear lens 4 includes a GM lens 41 (molded glass aspherical lens) and a rear group lens 42, both of which are arranged in the through hole. The outer peripheral surface of the GM lens 41 abuts against the inner wall of the annular limiting portion 111 and abuts against the rear end surface of the spacer ring 2, and the outer peripheral surface of the rear group lens 42 abuts against the inner wall of the through hole and abuts against the GM lens 41.

[0038] In order to avoid the burrs of the GM lens 41, the rear end face of the spacer 2 is provided with an annular clearance groove. When the GM lens 41 in the rear lens 4 abuts against the rear end face of the spacer 2, the edge of the GM lens 41 is aligned with the annular clearance groove, and the annular clearance groove can avoid the burrs at the edge of the GM lens 41.

[0039] Specifically, Figure 2 As shown, in order to ensure the strength of the spacer 2 and the parallelism between the front end face and the rear end face of the spacer 2, the thickness a of the spacer 2 is greater than or equal to 0.4 mm.

[0040] Furthermore, the depth b of the annular avoidance groove 21 is in the range of 0.05 mm-0.1 mm, and ab is greater than or equal to 0.35 mm. This structure can ensure that the spacer ring 2 does not deform when being abutted.

[0041] Furthermore, the width c of the annular avoidance groove 21 is in the range of 0.2 mm-0.3 mm, so as to ensure that the spacer ring 2 has a sufficient supporting position and can effectively avoid the burrs of the GM lens 41 .

[0042] In order to facilitate the assembly of the GM lens 41 into the annular limiting portion 111 from the rear side of the frame 1, a chamfer is provided on the side of the annular limiting portion 111 facing the rear lens 4, and the GM lens 41 can be quickly embedded in the annular limiting portion 111 through the chamfer guidance.

[0043] Optionally, the spacer 2 is a metal part, and the spacer 2 made of metal material can effectively ensure strength.

[0044] Refer to Figure 1 In this embodiment, the front lens 3 includes a front lens group 31 and a first lens 32, the frame 1 includes a main body 11 and a mounting portion 12, the main body 11 is provided with a through hole, the mounting portion 12 is provided with a mounting groove connected to the connecting groove, the front lens group 31 is arranged in the through hole and abuts against the front end surface of the spacer 2, the first lens 32 is arranged in the mounting groove, and is connected to the mounting portion 12 through the pressure cover 5 to fix the first lens 32.

[0045] Furthermore, the pressure cover 5 includes a connecting portion 51 and an extending portion 52 that are connected to each other, the connecting portion 51 is connected to the mounting portion 12, the extending portion 52 extends inwardly along the radial direction of the frame 1, and a plane is provided at the end of the extending portion 52, and the plane is provided at an angle to the connecting portion 51, so that the extending portion 52 can abut against the first lens 32, so that the plane of the extending portion 52 forms a surface contact with the first lens 32, and the first lens 32 is fixed more firmly.

[0046] Furthermore, the inner wall of the connecting portion 51 is provided with an internal thread, and the outer peripheral surface of the mounting portion 12 is provided with an external thread matching the internal thread. The connecting portion 51 is threadedly connected to the mounting portion 12 to facilitate the installation of the pressure cover 5, and the pressing force of the extension portion 52 on the first lens 32 can also be adjusted by rotating the pressure cover 5.

[0047] In order to further improve the sealing performance, a sealing ring 6 is provided between the bottom of the mounting groove and the first lens 32. Specifically, an annular groove is provided at the bottom of the mounting groove. The sealing ring 6 is provided in the annular groove, and the first lens 32 is provided in the mounting groove and abuts against the sealing ring 6.

[0048] In this embodiment, when assembling the lens structure, the front lens group 31 is first assembled into the through hole and abutted against the front end surface of the spacer 2, and the front lens group 31 is glued, and then the rear lens group 42 is assembled into the through hole and abutted against the rear end surface of the spacer 2, and the rear lens group 42 is glued.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Lens structure, characterized in that: include: A spectacles frame (1), wherein the spectacles frame (1) is provided with a through hole extending through the spectacles frame along its axial direction, and an annular limiting portion (111) is provided on the inner wall of the through hole; A spacer (2) is arranged in the through hole and abuts against the annular limiting portion (111), and the spacer (2) protrudes inwardly from the inner wall of the annular limiting portion (111) along the radial direction of the lens frame (1); A front lens (3) is disposed in the through hole and abuts against the front end surface of the spacer (2); The rear lens (4) is arranged in the through hole and abuts against the rear end surface of the spacer (2).

2. The lens structure according to claim 1, characterized in that: The rear end surface of the spacer (2) is provided with an annular avoidance groove (21), and the edge of the rear lens (4) is aligned with the annular avoidance groove (21).

3. The lens structure according to claim 2, characterized in that: The depth b of the annular avoidance groove (21) is in the range of 0.05 mm to 0.1 mm; and the width c of the annular avoidance groove (21) is in the range of 0.2 mm to 0.3 mm.

4. The lens structure according to claim 3, characterized in that: The thickness a of the spacer (2) is greater than or equal to 0.4 mm, and ab is greater than or equal to 0.35 mm.

5. The lens structure according to claim 2, characterized in that: The rear lens (4) includes a GM lens (41) and a rear lens group (42) both of which are arranged in the through hole. The outer peripheral surface of the GM lens (41) abuts against the inner wall of the annular limiting portion (111) and simultaneously abuts against the rear end surface of the spacer (2), and the edge of the GM lens (41) is aligned with the annular avoidance groove (21), and the outer peripheral surface of the rear lens group (42) abuts against the inner wall of the through hole and simultaneously abuts against the GM lens (41).

6. The lens structure according to claim 5, characterized in that: A chamfer is provided on one side of the annular limiting portion (111) facing the rear lens group (42).

7. The lens structure according to claim 1, characterized in that: The spacer (2) is a metal part.

8. The lens structure according to claim 1, characterized in that: The front lens (3) comprises a front lens group (31) and a first lens (32); The eyeglass frame (1) comprises a main body (11) and a mounting portion (12) which are connected to each other, the main body (11) being provided with the through hole, the mounting portion (12) being provided with a mounting groove which is connected with the through hole, the front lens group (31) being arranged in the through hole and abutting against the front end surface of the spacer (2), the first lens group (32) being arranged in the mounting groove and being connected with the mounting portion (12) via a pressure cover (5) so as to fix the first lens group (32).

9. The lens structure according to claim 8, characterized in that: The pressure cover (5) comprises a connecting portion (51) and an extending portion (52) which are connected to each other, wherein the connecting portion (51) is connected to the mounting portion (12), and the extending portion (52) is used to abut against the first lens (32) to fix the first lens (32).

10. The lens structure according to claim 8, characterized in that: A sealing ring (6) is provided between the bottom of the installation groove and the first lens (32).

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