Mirror frame structure convenient for turning and optical lens group

Abstract

The utility model relates to the technical field of optical part structures, and provides a lens frame structure convenient to turn and an optical lens group, the lens frame structure comprises a lens frame body, and a middle hole is formed in the lens frame body along the axial direction in a penetrating manner; the middle hole comprises a lens mounting hole and a threaded connection hole, and the lens mounting hole and the threaded connection hole are respectively positioned at two axial ends in the lens frame body; the threaded connection hole is used for being in threaded connection with a turning tool so that a machining gap can be formed between the end face, away from one side of the lens mounting hole, of the lens frame body and the turning tool. The problems that in the prior art, the production efficiency is low and the machining precision is affected due to the fact that a machine needs to be stopped to change the machining position in the machining process of the mirror frame are solved.

Description

Technical Field

[0001] The present application relates to the technical field of optical component structures, and more specifically, to a lens frame structure and an optical lens assembly that are convenient for turning processing. Background Art

[0002] The optical lenses in the prior art usually include a frame. When processing the frame, the front and rear faces of the frame need to be bonded to a centering lathe for positioning and processing, so as to process the front and rear faces and the outer cylindrical side of the frame. The specific process is: bond the front face of the frame to a turning tool, and turn the rear face and the outer cylindrical side dimensions; after turning the rear face and the outer cylindrical side into place, disassemble the frame and change the direction, bond the processed rear face to the turning tool, and turn the front face of the frame to meet the size requirements. Thus, the turning process is completed.

[0003] In the existing processing, turning tooling is used for two bonding and fixing processes, which results in the need to stop the machine and change the placement of the frame on the centering car, thus reducing production efficiency. Moreover, because the placement of the frame is changed, the positioning reference is changed, which affects the processing accuracy of the frame assembly and reduces the product yield.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] The purpose of the present application is to provide a frame structure and an optical lens set that are easy to turn, thereby solving the problem in the prior art that the frame needs to be stopped to change the processing position during the processing, resulting in low production efficiency and affecting the processing accuracy.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] On the one hand, the present application provides a spectacles frame structure that is convenient for turning processing, comprising a spectacles frame body, wherein a central hole is provided in the axial direction through the spectacles frame body;

[0008] The middle hole includes: a lens mounting hole and a threaded connection hole, and the lens mounting hole and the threaded connection hole are respectively located at two axial ends in the lens frame body;

[0009] The threaded connection hole is used for threaded connection with a turning tool, so that a processing gap is provided between the end surface of the lens frame body on the side away from the lens mounting hole and the turning tool.

[0010] In an optional embodiment, a threaded positioning portion is provided on the lens frame, and the threaded positioning portion limits the position where the turning tool is connected to the threaded connection hole by abutting against the turning tool.

[0011] In an optional embodiment, the threaded positioning portion is located in the middle hole;

[0012] The threaded positioning portion comprises an inner positioning surface, and the inner positioning surface is located at one end of the threaded connection hole facing the lens mounting hole.

[0013] In an optional embodiment, a backing groove is provided on a side of the inner positioning surface facing the threaded connection hole.

[0014] In an optional embodiment, the threaded positioning portion includes an outer positioning surface, and the outer positioning surface is arranged on an end surface of the lens frame body on a side away from the lens mounting hole;

[0015] An end face countersunk hole is provided on the end face of the lens frame body away from the lens mounting hole, a threaded connection hole is arranged on the bottom face of the end face countersunk hole, and an external positioning surface is located on the bottom face of the end face countersunk hole.

[0016] In an optional embodiment, a lens bearing portion is provided at one end of the lens mounting hole facing the threaded connection hole, and the lens bearing portion is used to abut against the end surface of the optical lens;

[0017] The contact position between the lens bearing portion and the optical lens is spaced a predetermined distance from the outer edge of the optical lens.

[0018] In an optional embodiment, the lens bearing portion includes: a retaining ring disposed between the threaded connection hole and the lens mounting hole,

[0019] The inner circular edge of the retaining ring on the side facing the lens mounting hole forms a contact position for abutting against the convex surface of the optical lens.

[0020] In an optional embodiment, the lens bearing portion includes a retaining ring disposed between the threaded connection hole and the lens mounting hole, and a boss disposed on a side of the retaining ring facing the lens mounting hole, wherein the boss is spaced from the inner wall of the lens mounting hole to form a space-avoiding groove;

[0021] The boss protrudes from the surface of the retaining ring to form a contact position for abutting against the concave surface of the optical lens.

[0022] In an optional embodiment, bevels are provided at the edges of the end faces on both axial sides of the frame body.

[0023] On the other hand, the present application provides an optical lens set, comprising an optical lens and a lens frame structure that is easy to turn as described above;

[0024] An adhesive layer is provided on the inner wall of the lens mounting hole of the lens frame structure, and the optical lens is fixed in the lens mounting hole through the adhesive layer.

[0025] The beneficial effects of a frame structure and an optical lens set that are convenient for turning processing provided by the present application are at least that: by setting a threaded connection hole and a turning tool for threaded connection, a processing gap is provided between the end face of the frame body that is away from the lens mounting hole and the turning tool. When turning, the turning tool can not only perform normal processing on the other side end face and the outer cylindrical side face of the axial direction without interference; but also because the turning tool can penetrate into the processing gap, the end face on this side can be processed. After being installed on the centering car once, the axial end faces and the outer cylindrical side faces of the frame body can be processed, and there is no need to perform reversing clamping, which greatly reduces the downtime adjustment time, thereby improving the processing efficiency. Moreover, the same positioning reference is used when processing the end faces and the outer cylindrical side faces on the front and rear sides, and the same reference can reduce the processing error and improve the processing accuracy. Therefore, compared with the prior art, this solution improves the product yield while reducing the time of stopping to replace the bonding position of the frame, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A cross-sectional view of a frame structure that is convenient for turning processing provided in an embodiment of the present application;

[0028] Figure 2 A cross-sectional view of an optical lens assembly provided in an embodiment of the present application during processing;

[0029] Figure 3 A cross-sectional view of an optical lens assembly provided by an embodiment of the present application at an isometric perspective;

[0030] Figure 4 A cross-sectional view of an optical lens assembly provided in an embodiment of the present application;

[0031] Figure 5 A partial cross-sectional view of another structure of an optical lens assembly provided in an embodiment of the present application.

[0032] Among them, the reference numerals in the figure are:

[0033] 100, lens frame; 110, center hole; 111, lens mounting hole; 112, threaded connection hole; 120, threaded positioning part; 121, inner positioning surface; 122, outer positioning surface; 123, tool withdrawal groove; 130, end face countersunk hole; 140, lens bearing part; 141, retaining ring; 142, boss; 143, air avoidance groove; 150, bevel; 200, optical lens; 300, turning tool; 310, connecting screw; 320, support rod; 330, processing gap. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0036] Embodiment 1

[0037] See also Figure 1 , Figure 2The present embodiment proposes a frame structure that is easy to turn, which is used to install an optical lens 200 to form an optical mirror. The frame structure that is easy to turn in the present embodiment mainly includes: a frame body 100, and a middle hole 110 is provided in the frame body 100 along the axial direction, and the axial direction is the front and rear direction of the frame body 100. The middle hole 110 includes: a lens mounting hole 111 and a threaded connection hole 112, and the lens mounting hole 111 and the threaded connection hole 112 are respectively located at the axial ends of the frame body 100; specifically, the lens mounting hole 111 is located at the front end of the frame body 100, and the threaded connection hole 112 is located at the rear end of the frame body 100. The lens mounting hole 111 is structurally designed according to the installation requirements of the specific lens to adapt to the installation of the lens. The threaded connection hole 112 located at the rear end is used for threaded connection with the turning tool 300, so that there is a processing gap 330 between the end face (rear end face) of the frame body 100 facing away from the lens mounting hole 111 and the turning tool 300, and the processing gap 330 can allow the processing turning tool to enter and process the rear end face.

[0038] The working principle of a mirror frame structure that is convenient for turning processing provided by this embodiment is as follows: by setting a threaded connection hole 112 and threading the turning tool 300, a processing gap 330 is provided between the rear end face of the mirror frame body 100 and the turning tool 300. Due to the existence of the processing gap 330, the turning tool can be allowed to enter one side of the rear end face, and the turning tool 300 will not interfere with the processing of the rear end face. When turning, the turning tool can not only perform normal processing on the front end face and the outer cylindrical side face of the mirror frame body 100 without interference; and because the turning tool can penetrate into the processing gap 330, the rear end face of the mirror frame body 100 can be processed. After being installed on the centering car once, the axial front and rear end faces and the outer cylindrical side face of the mirror frame body 100 can be processed, and there is no need to perform reversing clamping, which greatly reduces the downtime adjustment time, thereby improving the processing efficiency. In addition, the same positioning reference is used when processing the front and rear end faces and the outer cylindrical side face, and the same reference can reduce the processing error and improve the processing accuracy. Therefore, compared with the prior art, this solution improves the product yield while reducing the time of stopping the machine to replace the bonding position of the frame, thereby improving production efficiency.

[0039] See also Figure 1 , Figure 2Furthermore, in order to facilitate the installation of the lens frame 100 and the turning tool 300, a threaded positioning portion 120 is provided on the lens frame 100 in this embodiment, and the threaded positioning portion 120 limits the position of the turning tool 300 connected to the threaded connection hole 112 by abutting against the turning tool 300. The turning tool 300 has a connecting screw 310, and the turning tool 300 can also be provided with a support rod 320 connected to the connecting screw 310, the support rod 320 extends in the axial direction, and the connecting screw 310 is arranged at the end of the support rod 320. The processing gap 330 formed by such a structure can effectively avoid interference when the turning tool processes the rear end face. When the threaded connection hole 112 is connected to the connecting screw 310, the threaded positioning portion 120 can be abutted against the turning tool 300 to limit the position of the connecting screw 310 in the threaded connection hole 112. Not only can the lens frame 100 be stably fixed on the connecting screw 310 through the threaded connection hole 112, but the threaded positioning portion 120 can also realize the axial reference during the turning process, thereby ensuring the dimensional stability of the axial length of the lens frame 100 during the turning process.

[0040] According to the different thicknesses of the lens frame 100, different structures of the threaded positioning portion 120 may be used. The details are as follows:

[0041] See also Figure 1 , Figure 2 In the first structure of the threaded positioning part 120, which is suitable for the frame body 100 with a larger axial thickness, the threaded positioning part 120 can be arranged in the middle hole 110 and located between the lens mounting hole 111 and the threaded connection hole 112. Thus, the frame body 100 has sufficient thickness to ensure that the threaded positioning part 120 is located in the middle hole 110. When this structure is adopted, the diameter of the connecting screw 310 in the turning tool 300 is larger than the diameter of the support rod 320, so that the range of the processing gap 330 can be larger, thereby making the processing range of the rear end face larger, and will not interfere with the processing of the rear end face by the turning tool.

[0042] The threaded positioning portion 120 specifically includes an inner positioning surface 121, which is located at one end of the threaded connection hole 112 facing the lens mounting hole 111. A retaining ring 141 is arranged in the middle hole 110, and the retaining ring 141 is located between the lens mounting hole 111 and the threaded connection hole 112. The inner diameter of the retaining ring 141 is smaller than the inner diameter of the threaded connection hole 112, so the rearward end surface of the retaining ring 141 forms the inner positioning surface 121. When the connecting screw 310 of the turning tool 300 spirally enters the threaded connection hole 112, it is blocked by the inner positioning surface 121 in front of the threaded connection hole 112 and cannot continue to move forward, thereby indicating that the turning tool 300 is connected to the lens frame 100 in place through the threaded connection hole 112. Since the retaining ring 141 needs to be arranged in the middle hole 110 of the lens frame 100, the internal space of the middle hole 110 is occupied, resulting in the need for the lens frame 100 to have a larger thickness.

[0043] On the basis of the first structure of the threaded positioning portion 120, a back-cut groove 123 is provided on the side of the inner positioning surface 121 facing the threaded connection hole 112. By providing a deeper back-cut groove 123, firstly, it is convenient to process the inner thread of the threaded connection hole 112. After the back-cut groove 123 is processed, the inner thread is processed to make the inner thread complete. Secondly, it is convenient to process the inner positioning surface 121. The area of ​​the inner positioning surface 121 with the limiting function becomes larger and extends all the way into the back-cut groove 123. In this way, the inner positioning surface 121 can be completely pressed against the end face of the connecting screw 310 to achieve stable limiting.

[0044] See also Figure 5 In the second structure of the threaded positioning portion 120, the threaded positioning portion 120 includes an external positioning surface 122, and the external positioning surface 122 is arranged on the end surface of the lens frame 100 away from the lens mounting hole 111. It is suitable for a lens frame 100 with a smaller axial thickness, especially a thinner lens frame 100 with a diameter not greater than 20 mm. Since the thickness of the lens frame 100 is small, there is not enough space to provide the required design length of the tool backing groove 123. If the tool backing groove 123 is not provided, the connection between the turning tool 300 and the lens frame 100 will be unstable. Therefore, the structure of the external positioning surface 122 is proposed. When this structure is adopted, the diameter of the connecting screw 310 in the turning tool 300 is smaller than the diameter of the support rod 320, so that the front end of the support rod 320 can be abutted by the external positioning surface 122.

[0045] See also Figure 5In the specific structure, an end face countersunk hole 130 is provided on the rear end face of the lens frame 100, and the end face countersunk hole 130 is provided coaxially with the threaded connection hole 112, and the threaded connection hole 112 is provided on the bottom face (rear end face) of the end face countersunk hole 130, and the external positioning surface 122 is located on the bottom face (rear end face) of the end face countersunk hole 130. For a lens frame with a small thickness, it is not necessary to provide a backing groove 123 inside the middle hole 110, and the position is limited by the external positioning surface 122, so that it is not necessary to provide a retaining ring 141 in the middle hole 110 in the lens frame 100. When the connecting screw 310 of the turning tool 300 is screwed into the threaded connection hole 112, the front end surface of the support rod 320 of the turning tool 300 is blocked by the outer positioning surface 122 at the rear opening of the threaded connection hole 112, and the turning tool 300 cannot move forward, which means that the turning tool 300 is connected to the lens frame 100 through the threaded connection hole 112. Since it is not necessary to set the back cut groove 123 in the middle hole 110, sufficient axial length is left to design the size of the threaded connection hole 112. Therefore, this structure optimizes the internal space of the lens frame 100 and is suitable for processing and positioning of small-sized lens frames 100. This solves the problem of unstable connection caused by the insufficient design length of the thread back cut groove 123 due to the small thickness of the lens frame 100 and insufficient space.

[0046] See also Figure 3 , Figure 4 Furthermore, a lens bearing portion 140 is provided at one end of the lens mounting hole 111 facing the threaded connection hole 112. The lens bearing portion 140 is provided in the middle hole 110 and is mainly used to limit the axial installation position of the optical lens 200. The lens bearing portion 140 is used to abut against the end surface of the optical lens 200, so that the optical lens 200 can be installed at a predetermined position in the middle hole 110. The contact position between the lens bearing portion 140 and the optical lens 200 is spaced a predetermined distance from the outer edge of the optical lens 200. In this way, the force point of the lens bearing portion 140 is at a position inside the edge of the optical lens 200, so that the edge of the optical lens 200 will not be directly abutted and force will be applied, thereby avoiding the edge from being crushed by force. The edge of the optical lens 200 is effectively protected during the installation process to ensure the quality of the optical lens.

[0047] Since the optical lens 200 is divided into a convex lens and a concave lens, different lens bearing parts 140 are used for installation according to different situations in which the abutting surface is a convex surface or a concave surface, as follows:

[0048] See also Figure 3Furthermore, when the lens bearing part 140 abuts against the convex surface of the optical lens 200, the first lens bearing part 140 structure specifically includes: a retaining ring 141 disposed between the threaded connection hole 112 and the lens mounting hole 111, and the inner circle edge of the retaining ring 141 on the side facing the lens mounting hole 111 forms a contact position for abutting against the convex surface of the optical lens 200. The inner diameter of the retaining ring 141 is smaller than the inner diameter of the lens mounting hole 111, so when the optical lens 200 is installed in the lens mounting hole 111, the outer circle of the retaining ring 141 is located to avoid the outer circle edge of the optical lens 200, and the inner circle edge of the retaining ring 141 forms a contact position (stress point), and abuts against the convex surface of the optical lens 200 through the contact position, thereby achieving stable fixation while effectively avoiding the outer edge of the optical lens 200 to prevent edge collapse. It should be noted that the stress point (inner circle edge) of the retaining ring 141 is not chamfered and needs to be cleaned of burrs because the positioning accuracy of the chamfer is not high, which affects the positioning.

[0049] See also Figure 4 Furthermore, when the lens bearing part 140 abuts against the concave surface of the optical lens 200, the second lens bearing part 140 structure specifically includes: a retaining ring 141 disposed between the threaded connection hole 112 and the lens mounting hole 111, and a boss 142 disposed on the side of the retaining ring 141 facing the lens mounting hole 111. The inner diameter of the retaining ring 141 is smaller than the inner diameter of the lens mounting hole 111, and the boss 142 can be disposed at the inner circle edge and protrude toward one side of the lens mounting hole 111. The boss 142 of the retaining ring 141 is spaced apart from the inner wall of the lens mounting hole 111 to form a clearance groove 143. The protruding surface edge of the boss 142 forms a contact position for abutting against the concave surface of the optical lens 200. Therefore, when the optical lens 200 is installed in the lens mounting hole 111, the air avoidance groove 143 between the boss 142 and the lens mounting hole 111 avoids the outer circular edge of the optical lens 200, and a contact position (force point) is formed at the inner circular edge or the outer circular edge of the boss 142, which rests on the concave surface of the optical lens 200 through the contact position, thereby achieving stable fixation while effectively avoiding the outer edge of the optical lens 200 to prevent edge breakage.

[0050] It should be noted that the stress points (inner circle edge and / or outer circle edge) of the boss 142 are not chamfered and need to be cleaned of burrs because the positioning accuracy of the chamfer is not high, which affects the positioning.

[0051] See also Figure 1 , Figure 2Furthermore, in this embodiment, the edges of the end faces on both sides of the axial direction of the lens frame 100 are provided with bevel angles 150. The bevel angle 150 can be a large bevel angle 150 with a large axial resection length. The large bevel angles 150 are respectively provided on the front and rear end faces of the lens frame 100. There is an obtuse angle between the end face of the lens frame 100 and the outer circular side face, thereby greatly avoiding the generation of turning burrs, facilitating the lens frame 100 to be loaded into the lens barrel without the generation of burrs, and greatly improving the positioning accuracy of the lens frame 100 in the lens barrel. When the centering car is turned, burrs will be generated at the first feed. With the large bevel angle 150, even if burrs are generated at the chamfer of the end face of the lens frame 100, it will not affect the assembly accuracy of the outer circular side face and the lens frame 100.

[0052] Embodiment 2

[0053] See also Figure 3 , Figure 4 This embodiment proposes an optical lens set, including an optical lens 200 and a frame structure that is easy to turn as described above. An adhesive layer is provided on the inner wall of a lens mounting hole 111 of the frame structure, and the optical lens 200 is fixed in the lens mounting hole 111 through the adhesive layer.

[0054] In summary, the present application proposes a frame structure and optical lens set that are easy to turn, which can complete the processing of the front end face, rear end face and outer cylindrical side face of the frame body after clamping and positioning on the centering lathe once. Not only does the positioning reference remain the same when processing the front and rear end faces and outer cylindrical side face, which ensures the processing accuracy and improves the product yield; at the same time, it reduces the time of stopping the machine to replace the bonding position of the frame body, thereby improving production efficiency.

[0055] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A mirror frame structure that is convenient for turning, characterized in that: It comprises a lens frame body, wherein a central hole is provided in the lens frame body along the axial direction; The middle hole comprises: a lens mounting hole and a threaded connection hole, wherein the lens mounting hole and the threaded connection hole are respectively located at two axial ends of the lens frame body; The threaded connection hole is used for threaded connection with a turning tool, so that a processing gap exists between the end surface of the lens frame body which is away from the lens mounting hole and the turning tool.

2. The spectacles frame structure that is easy to turn as claimed in claim 1, characterized in that: The lens frame body is provided with a threaded positioning portion, and the threaded positioning portion limits the position where the turning tool is connected to the threaded connection hole by abutting against the turning tool.

3. The spectacles frame structure that is easy to turn as claimed in claim 2, characterized in that: The threaded positioning portion is located in the middle hole; The threaded positioning portion comprises an inner positioning surface, and the inner positioning surface is located at one end of the threaded connection hole facing the lens mounting hole.

4. The spectacles frame structure that is easy to turn as claimed in claim 3, characterized in that: A tool retreat groove is arranged on one side of the inner positioning surface facing the threaded connection hole.

5. The spectacles frame structure that is easy to turn as claimed in claim 2, characterized in that: The threaded positioning portion comprises an outer positioning surface, and the outer positioning surface is arranged on the end surface of the lens frame body on the side away from the lens mounting hole; An end face countersunk hole is provided on the end face of the lens frame body away from the lens mounting hole, the threaded connection hole is arranged on the bottom face of the end face countersunk hole, and the external positioning surface is located on the bottom face of the end face countersunk hole.

6. The spectacles frame structure that is convenient for turning processing as claimed in any one of claims 1 to 5, characterized in that: A lens bearing portion is provided at one end of the lens mounting hole facing the threaded connection hole, and the lens bearing portion is used to abut against the end surface of the optical lens; The contact position between the lens bearing portion and the optical lens is spaced a predetermined distance from the outer edge of the optical lens.

7. The spectacles frame structure that is easy to turn as claimed in claim 6, characterized in that: The lens bearing portion comprises: a retaining ring arranged between the threaded connection hole and the lens mounting hole, The inner circular edge of the retaining ring facing the lens mounting hole forms the contact position for abutting against the convex surface of the optical lens.

8. The spectacles frame structure that is convenient for turning processing as claimed in claim 6, characterized in that: The lens bearing portion includes a retaining ring disposed between the threaded connection hole and the lens mounting hole, and a boss disposed on a side of the retaining ring facing the lens mounting hole, wherein the boss is spaced from the inner wall of the lens mounting hole to form a clearance groove; The boss protrudes from the surface of the retaining ring to form the contact position for abutting against the concave surface of the optical lens.

9. The spectacles frame structure that is convenient for turning processing as claimed in any one of claims 1 to 5, characterized in that: The edges of the end faces on both axial sides of the lens frame are both provided with bevels.

10. An optical lens assembly, characterized in that: It comprises an optical lens and a frame structure that is easy to turn as described in any one of claims 1 to 9; An adhesive layer is provided on the inner wall of the lens mounting hole of the frame structure, and the optical lens is fixed in the lens mounting hole through the adhesive layer.

Images