Locking and pressing ring and lens

Abstract

The utility model provides a locking and pressing ring and a lens, the locking and pressing ring is used for locking and fixing a lens, the locking and pressing ring comprises an annular main body part and a plurality of extending bosses, the main body part comprises an inner side wall and an outer side wall, and the extending bosses are arranged on the inner side wall at intervals and extend towards the center of the locking and pressing ring. According to the locking and pressing ring and the lens structure provided by the utility model, the deformation of the optical effective part of the lens can be avoided, and in the axial direction, due to the fact that the high-temperature expansion amount of the lens is larger than the expansion amount of the lens cone or the low-temperature shrinkage amount of the lens is smaller than the shrinkage amount of the lens cone, extrusion deformation occurs in the axial direction; the lens is subjected to extrusion force in the axial direction and transmits the extrusion force to the extension boss of the locking and pressing ring, and the extension boss deforms so as to prevent the surface type and curvature radius change caused by extrusion of the internal lens. The extrusion force is unloaded through the deformation of the extension boss, thereby avoiding the deformation of the optical effective part of the lens, and improving the imaging quality of the lens.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging lenses, in particular to a locking ring and a lens. Background Art

[0002] Optical lenses have the function of light transmission and are widely used in various imaging fields such as automotive, security, and intelligent manufacturing. As a precision optical component, optical lenses have strict requirements on manufacturing and installation accuracy, and their imaging performance is sensitive to different temperatures. Optical lenses are usually installed in the lens barrel in a superimposed or interlocked manner. During assembly, they are circumferentially fixed by the inner wall of the lens barrel and axially fixed by locking rings, front rings, spacers, and lens barrels. However, under high or low temperature conditions, due to the different axial and radial expansion and contraction of the lenses, spacers, and lens barrels, extrusion occurs between the components, causing deformation of the optical effective diameter and thus affecting the optical performance; that is, at high temperatures, the traditional lens has a radial expansion greater than the radial expansion of the lens barrel, causing the effective diameter of the lens to be squeezed and deformed, resulting in changes in the surface shape and lens curvature radius (the optical effective area is squeezed and affects the imaging), which in turn causes changes in the position of the imaging surface and leads to a decrease in the resolution of the lens.

[0003] Therefore, it is necessary to provide an optical lens that does not affect the optical effective area under high and low temperature conditions to solve the above problems. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a locking ring and a lens, which can avoid deformation of the optically effective part of the lens and have the advantage of excellent imaging quality.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a locking ring for locking and fixing a lens, comprising an annular main body and a plurality of extending bosses, wherein the main body comprises an inner side wall and an outer side wall, and the extending bosses are arranged on the inner side wall at intervals and extend toward the center of the locking ring.

[0007] Further preferably, the number of the extension bosses is three, and the extension bosses are evenly arranged on the inner side wall of the main body.

[0008] Further preferably, the thickness of the extended boss in the axial direction is less than 2 mm.

[0009] Further preferably, a thread cooperating with the lens barrel is provided on the outer side wall of the locking ring, and the thread is used to cooperate with the lens barrel to achieve installation and fixation.

[0010] Further preferably, the locking ring further comprises a buffer groove, and the buffer groove is arranged at the connection between the extending boss and the main body.

[0011] A lens comprises the above-mentioned locking ring, a lens and a lens barrel, wherein the lens and the locking ring are arranged in the lens barrel, the lens rests on the extended boss of the locking ring, and the outer side wall of the main body of the locking ring abuts against the inner wall of the lens barrel.

[0012] The beneficial effects of the utility model are:

[0013] The locking ring and lens structure provided by the utility model can prevent the optical effective part of the lens from being deformed. In the axial direction, due to the high-temperature expansion of the lens being greater than the expansion of the lens barrel or the low-temperature contraction of the lens being less than the contraction of the lens barrel, there will be extrusion deformation in the axial direction. The lens is subjected to the extrusion force in the axial direction and the extrusion force is transmitted to the extended boss of the locking ring. The extended boss will be deformed to prevent the internal lens from being extruded and causing the surface shape and curvature radius to change. The extrusion force is unloaded by the deformation of the extended boss, so as to avoid the deformation of the optical effective part of the lens and improve the imaging quality of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 A schematic diagram of the structure of the locking ring provided by the utility model;

[0016] Figure 2 A front view of the lens provided by the utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of the assembly of the middle locking ring and the lens;

[0018] Figure 4 for Figure 3 Cross-sectional view of AA in the middle;

[0019] Illustrations: 1-locking ring, 11-main body, 101-inner wall, 102-outer wall, 12-extended boss, 2-lens, 3-lens barrel, 4-optical axis.

[0020] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0021] In order to better understand the utility model, a more detailed description of various aspects of the utility model will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of embodiments of the utility model, and do not limit the scope of the utility model in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0022] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0023] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present invention, "may" is used to mean "one or more embodiments of the present invention". And, the term "exemplary" is intended to refer to an example or illustration.

[0024] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which the utility model belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] like Figure 1As shown, the utility model provides a locking ring for locking and fixing a lens in a lens barrel. The locking ring 1 includes an annular main body 11 and a plurality of extension bosses 12. The main body 11 includes an inner side wall 101 and an outer side wall 102, and the extension bosses 12 are arranged on the inner side wall 101 at intervals and extend toward the center of the locking ring 1. During installation, the end of the lens abuts against the extension boss 12 of the locking ring 1 in the axial direction. In the axial direction, due to the high-temperature expansion of the lens being greater than the expansion of the lens barrel or the low-temperature contraction of the lens being less than the contraction of the lens barrel 3, there will be an extrusion deformation in the axial direction. The lens is subjected to an extrusion force in the axial direction and the extrusion force is transmitted to the extension boss 12 of the locking ring 1. The extension boss 12 will be deformed to prevent the internal lens from being extruded and causing changes in the surface shape and curvature radius. The extrusion force is unloaded by the deformation of the extension boss 12, so that the optical effective part of the lens is prevented from being deformed, thereby improving the imaging quality of the lens. It should be noted that the direction parallel to the optical axis 4 is defined as the axial direction, and the direction extending along the outer diameter of the lens is defined as the radial direction.

[0027] More specifically, there are three extension bosses 12, which are evenly arranged on the inner side wall 101 of the main body 11. The lens evenly transmits the extrusion force to the extension bosses 12, and the extrusion force in the axial direction on the extension bosses 12 can be evenly distributed.

[0028] The thickness of the extended boss 12 in the axial direction is less than 2 mm. By controlling the thickness of the extended boss 12, the deformation is concentrated on the structure of the extended boss 12 during extrusion, thereby preventing the lens from being subjected to excessive stress, causing the lens 2 surface shape to change and affecting the imaging of the lens.

[0029] The outer side wall 102 of the locking ring 1 is provided with threads that match the lens barrel, and the threads are used to match the lens barrel to achieve installation and fixation.

[0030] In order to enable the extension boss 12 to deform better when subjected to the extrusion force, the locking ring 1 further includes a buffer groove, which is provided at the connection between the extension boss 12 and the main body 11 .

[0031] like Figures 2 to 4 As shown, a lens comprises the above-mentioned locking ring 1, as well as a lens 2 and a lens barrel 3. The lens 2 and the locking ring 1 are arranged in the lens barrel 3, and the lens 2 bears on the extended boss 12 of the locking ring 1. It can be understood that the end of the lens 2 abuts against the extended boss 12 of the locking ring 1 in the axial direction, so that the extended boss 12 unloads the axial squeezing force of the lens 2 through deformation, thereby avoiding the change of the surface shape and curvature radius caused by the deformation of the lens 2. The outer wall 102 of the main body 11 of the locking ring 1 abuts against the inner wall of the lens barrel 3.

[0032] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A locking ring, characterized in that: It comprises an annular main body (11) and a plurality of extension bosses (12); the main body (11) comprises an inner wall (101) and an outer wall (102); the extension bosses (12) are arranged at intervals on the inner wall (101) and extend towards the center of the locking ring (1).

2. A locking ring according to claim 1, characterized in that: The number of the extending bosses (12) is three, and the extending bosses (12) are evenly arranged on the inner side wall (101) of the main body (11).

3. A locking ring according to claim 1, characterized in that: The thickness of the extended boss (12) in the axial direction is less than 2 mm.

4. A locking ring according to claim 1, characterized in that: The outer side wall (102) of the locking ring (1) is provided with threads.

5. A locking ring according to claim 1, characterized in that: The locking ring (1) further comprises a buffer groove, which is arranged at the connection between the extending boss (12) and the main body (11).

6. A lens, characterized in that: It comprises a locking ring as described in any one of claims 1 to 5, and a lens (2) and a lens barrel (3), wherein the lens (2) and the locking ring (1) are arranged in the lens barrel (3), the lens (2) rests on an extended boss (12) of the locking ring (1), and the outer wall (102) of the main body (11) of the locking ring (1) abuts against the inner wall of the lens barrel (3).

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