Endoscope lens fixing seat bevel hole turning clamping jig

Abstract

A turning and clamping fixture for the inclined inner hole of an endoscope lens holder belongs to the field of precision machining technology. It includes a clamping mechanism and an elastic guiding mechanism. The clamping mechanism includes a fixture body, a limiting rod, and a locking bolt. The elastic guiding mechanism includes a guide rod, a spring, and a plug. The fixture body has a guide hole with an offset angle consistent with the inclined surface of the endoscope lens holder. The spring and guide rod are placed sequentially from bottom to top within the guide hole. The lower end of the spring is connected to a limiting plug. The upper part of the guide rod is connected to a clamping hole for holding the endoscope lens holder. The center lines of the clamping hole and the guide hole coincide. This utility model has a compact structure and reasonable design, solving the clamping and positioning problem of the endoscope lens holder during turning to meet machining accuracy requirements. For batch processing, it can effectively improve product quality, pass rate, and processing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of precision machining technology, and specifically relates to a turning and clamping fixture for the inclined inner hole of an endoscope lens holder. Background Technology

[0002] Endoscope lens holders, serving as the tip of an endoscope, are widely used in medical and industrial fields. They are small in size and require high precision; their manufacturing accuracy directly affects the assembly accuracy of the lens, and consequently, the imaging performance of the endoscope's optical system. Furthermore, the design of these lens holders often features similar structural characteristics, typically including countersunk holes on their beveled surfaces for lens placement. However, during manufacturing, the short clamping portion and thin-walled structure make effective machining and clamping positioning impossible to meet production requirements. Utility Model Content

[0003] The purpose of this invention is to solve the clamping and positioning problems of the inclined inner hole of the endoscope lens holder during the turning process. A turning clamping fixture for the inclined inner hole of the endoscope lens holder is designed to solve the clamping and positioning problems in the turning process. This can effectively improve the quality level, pass rate and processing efficiency of such products.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A machining fixture for the inner hole of an endoscope lens holder's inclined surface includes a clamping mechanism and an elastic guiding mechanism. The clamping mechanism includes a fixture body, a limiting rod, and a locking bolt. The elastic guiding mechanism includes a guide rod, a spring, and a plug. The fixture body has a guide hole with an offset angle consistent with the inclined surface of the endoscope lens holder. A spring and a guide rod are placed sequentially from bottom to top within the guide hole. The upper end of the spring applies a spring force to the guide rod, causing the guide rod to reciprocate linearly within the guide hole. The lower end of the spring is connected to a plug for limiting the movement. A plug for limiting the movement is connected to the upper end of the guide rod. The clamping hole for holding the endoscope lens holder coincides with the center line of the guide hole. The clamping hole is larger than the guide hole. A limiting step is provided at the connection between the two to abut against and limit the endoscope lens holder. The clamp body has a bolt mounting surface parallel to the guide hole along the lower part of the axis. A locking bolt is connected to the bolt mounting surface. The clamp body has a slot that can achieve elastic deformation at the clamping hole. The limiting rod is coaxially connected to the limiting hole on the clamp body. The limiting rod passes through the limiting groove inside the guide rod to limit the rotational movement of the guide rod.

[0006] The clamping hole serves as the machined inner hole of the endoscope lens holder, and is used to position its cavity structure and as an internal support structure.

[0007] Two threaded holes for connecting locking bolts are symmetrically distributed on the bolt mounting surface, and the plug is connected to the plug mounting threaded hole opened on the fixture body.

[0008] The single-sided gap between the clamping surface of the endoscope lens holder and the clamping hole is less than the deformation amount applied to the endoscope lens holder by the slot.

[0009] The clamp body is a cylindrical structure with sufficient equipment clamping allowance on one side in the length direction for easy clamping. During equipment clamping, the clamp body will not undergo elastic deformation caused by the equipment clamping force on the slot.

[0010] After the endoscope lens holder is installed, the guide rod still provides elastic support to it, the spring is in a non-limit state that can achieve elastic deformation, and the limiting rod is in a non-limit position within the limiting groove.

[0011] After installation, the rotation axis of the machined hole of the endoscope lens holder coincides with the axis of the fixture body.

[0012] This utility model has a compact structure and reasonable design, which solves the problem of clamping and positioning of the endoscope lens holder during the turning process to meet the processing accuracy requirements. When processing batch products, it can effectively improve the product quality level, pass rate and processing efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembly structure of a clamping fixture for turning inclined inner holes;

[0014] Figure 2 This is an exploded view of the fixture for turning inclined inner holes;

[0015] Figure 3 This is a schematic diagram of the fixture body structure;

[0016] Figure 4 This is a cross-sectional schematic diagram of a clamping fixture for turning inclined inner holes.

[0017] Figure 5 A schematic diagram of the endoscope lens holder;

[0018] Figure 6 This is a schematic diagram of the endoscope lens holder and guide rod.

[0019] In the diagram: 1-Clamp body; 2-Guide rod; 3-Spring; 4-Plug; 5-Locking bolt; 6-Limit rod; 7-Endoscope lens holder; 8-Bolt mounting surface; 9-Threaded hole; 10-Clamping hole; 11-Slotted groove; 12-Limit hole; 13-Plug mounting threaded hole; 14-Guide hole; 15-Limit step; 16-Limit groove; 17-Internal support structure. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are...

[0021] Some embodiments of this utility model, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0022] Example 1

[0023] like Figures 1 to 2 The diagram shows a machining fixture for the inclined inner hole of an endoscope lens holder. The fixture consists of two parts: a clamping mechanism and an elastic guiding mechanism. The clamping mechanism includes a fixture body 1, a limiting rod 6, and a locking bolt 5. The elastic guiding mechanism includes a guide rod 2, a spring 3, and a plug 4.

[0024] like Figures 3 to 4 As shown, the clamp body 1 is a cylindrical structure with a guide hole 14 inside, which has an offset angle consistent with the inclined surface of the endoscope lens holder 7. A spring 3 and a guide rod 2 are placed sequentially from bottom to top inside the guide hole 14. One end of the spring 3 applies elastic force to the guide rod 2, and the other end is fixed and limited by a plug 4 and a plug mounting threaded hole 13. A clamping hole 10 is connected above the guide hole 14 for clamping the endoscope lens holder 7. The center line of the clamping hole 10 coincides with that of the guide hole 14. The clamping hole 10 is larger than the guide hole 14, and the endoscope lens holder 7 can be limited by the limiting step 15 at the connection between the clamping hole 10 and the guide hole 14.

[0025] like Figure 4 , Figure 6 As shown, the guide rod 2 has a limiting groove 16 that cooperates with the limiting rod 6. The limiting rod 6 is coaxially connected with the limiting hole 12 of the fixture body 1. The limiting rod 6 passes through the limiting hole 1 and the limiting groove 16 to limit the rotation and guiding movement of the guide rod 2. On this basis, one end of the guide rod 2 contacts the spring 3 and can achieve linear reciprocating motion within the guide hole 14 under the action of elastic force. The other end serves as the endoscope lens holder 7, which is machined into an inner hole to position its cavity structure. As its internal structure 22, the internal support structure 22 has a clearance corresponding to the machined hole of the endoscope lens holder 7, so as not to interfere with the turning tool during the machining process.

[0026] like Figure 3 , Figure 4As shown, the fixture body 1 has a bolt mounting surface 8 parallel to the guide hole 14 along its lower axis. Two threaded holes 9 are symmetrically distributed on the bolt mounting surface 8, which are connected to the locking bolt 5. The fixture body 1 has a slotted groove 11 at the clamping hole 10 of the endoscope lens holder 7, allowing for elastic deformation. Before turning, the fixture body 1 is mounted on a lathe fixture and fixed. The endoscope lens holder 7 is mounted on the guide rod 2 and pressed into the fixture body 1. The endoscope lens holder 7 is held in place by a limiting step 15. Tightening the locking bolt 5 causes the clamping hole 10 to undergo elastic deformation, thus locking and fixing the endoscope lens holder 7.

[0027] The single-sided gap between the clamping surface of the endoscope lens holder 7 and the clamping hole 10 is less than the deformation amount applied to the endoscope lens holder 7 by the slot 11.

[0028] The clamp body 1 has sufficient clamping allowance on one side in the length direction to facilitate clamping, and during the clamping process, the clamp body 1 will not produce elastic deformation caused by the clamping force of the equipment on the slot 11.

[0029] After installation, the guide rod 2 still provides elastic support to the endoscope lens holder 7, the spring 3 is in a non-limited state that allows for elastic deformation, and the limiting rod 6 is in a non-limited position in the limiting groove 16. After installation, the rotation axis of the machined hole of the endoscope lens holder 7 coincides with the axis of the fixture body 1.

[0030] The working process of this utility model:

[0031] Before turning, the endoscope lens holder 7 is fitted onto the guide rod 2 to achieve the structural positioning and internal support of the machined hole relative to its cavity. Limiting is achieved through the limiting step 15 and the limiting rod 6. Tightening the locking bolt 5 causes the clamping hole 10 to elastically deform and lock the endoscope lens holder 7 in place. After installation, the machined hole of the endoscope lens holder 7 coincides with the rotation axis of the fixture body 1. Once installation is complete, the inner hole is turned.

[0032] The embodiments described above are merely preferred embodiments of the present invention and are not intended to be exhaustive.

[0033] The scope of this invention is defined. Without departing from the spirit of this invention, all modifications and improvements made by those skilled in the art to the technical solution of this invention shall fall within the protection scope defined by the claims of this invention.

Claims

1. A fixture for machining the inner hole of the inclined surface of an endoscope lens holder, characterized in that, The device includes a clamping mechanism and an elastic guiding mechanism. The clamping mechanism comprises a clamping body, a limiting rod, and a locking bolt. The elastic guiding mechanism comprises a guide rod, a spring, and a plug. The clamping body has a guide hole with an offset angle consistent with the inclined surface of the endoscope lens holder. A spring and a guide rod are placed sequentially from bottom to top within the guide hole. The upper end of the spring applies a spring force to the guide rod, causing it to reciprocate linearly within the guide hole. The lower end of the spring is connected to a plug for limiting the movement. A locking bolt for clamping the endoscope lens holder is connected above the guide rod. The clamping hole coincides with the center line of the guide hole, and the size of the clamping hole is larger than that of the guide hole. A limiting step is provided at the connection between the two to abut against the limiting endoscope lens fixing seat. A bolt mounting surface parallel to the guide hole is opened along the lower part of the clamp body. A locking bolt is connected to the bolt mounting surface. The clamp body has a slot that can achieve elastic deformation at the clamping hole. The limiting rod is coaxially connected with the limiting hole opened on the clamp body. The limiting rod passes through the limiting groove opened inside the guide rod to limit the rotational movement of the guide rod.

2. The endoscope lens holder inclined inner hole turning clamping fixture according to claim 1, characterized in that, The clamping hole serves as the machined inner hole of the endoscope lens holder, and is used to position its cavity structure and as an internal support structure.

3. The endoscope lens holder inclined inner hole turning clamping fixture according to claim 1, characterized in that, Two threaded holes for connecting locking bolts are symmetrically distributed on the bolt mounting surface, and the plug is connected to the plug mounting threaded hole opened on the fixture body.

4. The endoscope lens holder inclined inner hole turning clamping fixture according to claim 1, characterized in that, The single-sided gap between the clamping surface of the endoscope lens holder and the clamping hole is less than the deformation amount applied to the endoscope lens holder by the slot.

5. The endoscope lens holder inclined inner hole turning clamping fixture according to claim 1, characterized in that, The clamp body is a cylindrical structure with sufficient equipment clamping allowance on one side in the length direction for easy clamping. During equipment clamping, the clamp body will not undergo elastic deformation caused by the equipment clamping force on the slot.

6. The endoscope lens holder inclined inner hole turning clamping fixture according to claim 1, characterized in that, After the endoscope lens holder is installed, the guide rod still provides elastic support to it, the spring is in a non-limit state that can achieve elastic deformation, and the limiting rod is in a non-limit position within the limiting groove.

7. A machining fixture for the inclined inner hole of an endoscope lens holder according to any one of claims 1 to 6, characterized in that, After installation, the rotation axis of the machined hole of the endoscope lens holder coincides with the axis of the fixture body.

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