Thread-removed large-diameter objective lens base

Abstract

The invention relates to the technical field of objective lens bases, in particular to a thread-removed large-diameter objective lens base which comprises a lens and further comprises a lens base body, an external thread face is arranged on the outer ring face of the lens base body, and end face grooves are formed in the two end faces of the lens base body in a circumferential array mode. According to the thread-removed large-diameter objective lens base provided by the invention, the external thread surface of the lens base body can be assembled on a specific clamping tool in a threaded manner, and after the lens base body is mounted on the threaded inner hole of the clamping tool in a threaded manner to process one end surface of the lens base body, the lens base body is rotationally taken down and reversely screwed into the clamping tool; therefore, the parallelism machining precision of the two end faces of the mirror base body is improved, and the assembling precision of the mirror base body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of objective lens seats, and in particular to a threaded large-diameter objective lens seat. Background Art

[0002] In the assembly process of precision microscopes, multiple sets of objective lens mounts need to support each other. The objective lens mounts also contain various lenses, diaphragms and other optical components. The one-size-fits-all process is gradually unable to meet the needs. In order to ensure the accuracy of the lenses, fixtures are usually used to ensure the accuracy, but the processing operators are required to have high skills and experience. The repeated use of fixtures has a great impact on production efficiency.

[0003] According to the publication number CN207534031U, the publication (announcement) date: 2018.06.26, a turntable type clip fine milling machine is disclosed, which relates to the technical field of milling processing equipment, including a bed, two bearing seats are installed on the bed, and a spindle is installed on the bearing seat; a turntable mechanism for mounting a workpiece is provided on the spindle, and the turntable mechanism is arranged between the two bearing seats; an adjustable positioner for adjusting the axial position of the workpiece is provided on one side of the turntable mechanism, and a turntable damping mechanism for preventing the turntable mechanism from reversing is provided on the other side of the turntable mechanism; a first milling cutter assembly and a second milling cutter assembly are respectively provided on both sides of the turntable mechanism; a transmission is installed at one end of the spindle. The technical problem of poor stability of the fine milling machine existing in the prior art is alleviated.

[0004] In the prior art including the above-mentioned patent, an adjustable positioner is arranged on the turntable mechanism, and a damping mechanism is arranged on the other side to prevent the turntable from reversing, so as to ensure that the clip is tightened and improve the end face accuracy of fine milling. However, this clip mechanism is relatively complicated, and the precision processing efficiency for small workpieces is not high, and the precision of processing precision microscopes still does not meet the requirements. It is necessary to process the objective lens holder with high flatness at both ends to facilitate assembly and ensure the effectiveness of precision microscopes. In order to achieve this goal, a turning clip and a thread-twisting center-turning clip structure are usually used. When the clip is used for turning processing, there is an error in the coaxiality of the processed workpiece and the supported clip. After processing, it is not easy to ensure the parallelism of the two ends, which brings difficulties to the subsequent assembly. Summary of the invention

[0005] The purpose of the present invention is to provide a thread-removed large-diameter objective lens holder to solve the above-mentioned problem.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a threaded large-diameter objective lens holder, comprising a lens and a holder body, whose outer annular surface is provided with an external threaded surface, and end face grooves are provided on both end faces of the holder body in a circumferential array.

[0007] Preferably, threaded holes for locking the lens in the inner ring of the lens base body are arranged in a circumferential array on the lens base body, the threaded holes penetrate the external threaded surface and the threaded holes and the end face grooves are arranged circumferentially at intervals.

[0008] Preferably, an annular supporting portion is coaxially arranged on the inner annular surface of the lens holder body, and a concave arc groove that fits the surface of the lens is formed on the supporting portion.

[0009] Preferably, a matching seat is further included, which can be divided into a contact ring portion, a limiting ring portion and an end face ring portion, and a contact ring groove and a limiting ring groove are provided on the lens seat body, the contact ring portion pushes the stepped position of the lens into the lens seat body so that the limiting ring portion coaxially contacts the limiting ring groove, and the end face ring portion contacts the contact ring groove so that the height of the end face ring portion is lower than the end face of the lens seat body.

[0010] Preferably, a connecting hole is provided on the lens holder body, one end of the connecting hole is connected to between the contact ring portion and the limiting ring portion, and the other end of the connecting hole is connected to the surface of the end face ring portion.

[0011] Preferably, it also includes a flexible insertion member, which is arranged in the installation groove of the matching seat, and the lens seat body is provided with an insertion groove connecting the threaded hole and the limiting ring groove, and the contact ring portion pushes the lens into the lens seat body so that the flexible insertion member follows the matching seat through the insertion groove and extends into the threaded hole, and the locking screw is rotated into the threaded hole to cut off the first end of the flexible insertion member so as to be located between the locking screw and the lens.

[0012] Preferably, the flexible insertion member is movably arranged in the installation groove, and a through hole and a blocking portion are provided on the flexible insertion member. In the default state of the flexible insertion member, the through hole is coaxial with the connecting hole, and the flexible insertion member is squeezed and moved by the set screw so that the blocking portion moves to block the connecting hole.

[0013] Preferably, the lens holder is made of metal.

[0014] Preferably, the mating seat is a metal part.

[0015] Preferably, the flexible extending member is made of rubber.

[0016] In the above technical scheme, the present invention provides a thread-removed large-diameter objective lens holder, which has the following beneficial effects: the outer thread surface of the lens holder body can be used for threaded assembly on a specific clamping tool, that is, the clamping tool is provided with a threaded inner hole matching the outer thread surface, and after the lens holder body is threadedly installed on the threaded inner hole of the clamping tool to process one end face of the lens holder body, the lens holder body is rotated and removed and reversely screwed into the clamping tool to turn around and process the other end face of the lens holder body, thereby improving the parallelism processing accuracy of the two end faces of the lens holder body, thereby improving the assembly accuracy of the lens holder body. When the lens holder body is assembled and placed in the lens barrel, it can be used as a normal objective lens holder, and after the outer thread surface of the lens holder body is partially removed, the parallelism accuracy of the two end faces of the lens holder body is about 100%, and the error between multiple groups of objective lens holders is smaller, thereby ensuring that the overall accuracy of the precision microscope reaches the effect, and the lens holder body and the lens barrel are more loosely matched under the same dimensional tolerance conditions, and it is also convenient to take out the lens holder body inside the lens barrel for actual assembly and use. Secondly, an end face groove is provided on the end face of the lens base body. When the lens base body needs to be disassembled, tweezers are used to align the end face groove of the lens base body to rotate the lens base body for disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of an overall explosion structure provided for an embodiment of the present invention;

[0020] Figure 3 A schematic structural diagram of a mirror base provided by an embodiment of the present invention;

[0021] Figure 4 A schematic cross-sectional view of the overall structure provided for an embodiment of the present invention;

[0022] Figure 5 A schematic cross-sectional view of the structure of the lens and the overall assembly provided by an embodiment of the present invention;

[0023] Figure 6 The embodiment of the present invention provides Figure 4 A local enlarged schematic diagram of the middle A;

[0024] Figure 7 The embodiment of the present invention provides Figure 5 A local enlarged schematic diagram of point B in the middle.

[0025] Description of reference numerals:

[0026] 1. Lens base body; 11. External threaded surface; 12. End face groove; 13. Threaded hole; 131. Insertion groove; 2. Matching seat; 14. Supporting part; 15. Contact ring groove; 16. Limiting ring groove; 21. Contact ring part; 22. Limiting ring part; 221. Mounting groove; 222. Connecting hole; 23. End face ring part; 3. Flexible insertion member; 31. Insertion part; 32. Through hole; 33. Blocking part; 9. Lens. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0028] like Figure 1-7 As shown, a threaded large-diameter objective lens holder includes a lens 9 and a holder body 1, whose outer annular surface is provided with an outer threaded surface 11, and end surface grooves 12 are provided on both end surfaces of the holder body 1 in a circumferential array.

[0029] Specifically, Figure 1 As shown, the outer ring surface of the lens base body 1 is provided with an external threaded surface 11, and the two end surfaces of the lens base body 1 are provided with end surface grooves 12 in a circumferential array, and the outer thread surface 11 is partially cut off so that the outer diameter of the lens base body 1 is larger than the outer diameter after the outer thread surface 11 is partially cut off. The external threaded surface 11 of the lens base body 1 can be used for threaded assembly on a specific clamping tool, that is, the clamping tool is provided with a threaded inner hole matching the external threaded surface 11. After the lens base body 1 is threadedly installed on the threaded inner hole of the clamping tool to process one end surface of the lens base body 1, the lens base body 1 is rotated and removed and screwed into the clamping tool in the opposite direction, so that the other end surface of the lens base body 1 can be processed in a reverse direction, thereby improving the parallelism processing accuracy of the two end surfaces of the lens base body 1, thereby improving the assembly accuracy of the lens base body 1. When the lens base body 1 is assembled and placed in the lens barrel, it can be used as a normal objective lens base. After partially removing the outer thread surface 11 of the lens base body 1, the parallelism accuracy of the two end faces of the lens base body 1 is about 1 thread, and the error between multiple groups of objective lens bases is smaller, thereby ensuring the overall accuracy of the precision microscope to achieve effectiveness, and the lens base body 1 and the lens barrel are more loosely matched under the same dimensional tolerance conditions, and it is also convenient to remove the lens base body 1 inside the lens barrel for actual assembly and use. Secondly, the end face of the lens base body 1 is provided with an end face groove 12. When the lens base body 1 needs to be disassembled, use tweezers to align the end face groove 12 of the lens base body 1 to rotate the lens base body 1 for disassembly.

[0030] In the above technical solution, the outer thread surface 11 of the lens base body 1 can be used for threaded assembly on a specific clamping tool, that is, the clamping tool is provided with a threaded inner hole matched with the outer thread surface 11, and after the lens base body 1 is threadedly installed on the threaded inner hole of the clamping tool to process one end face of the lens base body 1, the lens base body 1 is rotated and removed and reversely screwed into the clamping tool to turn around and process the other end face of the lens base body 1, thereby improving the parallelism processing accuracy of the two end faces of the lens base body 1, thereby improving the assembly accuracy of the lens base body 1. When the lens base body 1 is assembled and placed in the lens barrel, it can be used as a normal objective lens base, and after the outer thread surface 11 of the lens base body 1 is partially removed, the parallelism accuracy of the two end faces of the lens base body 1 is about 1 thread, and the error between multiple groups of objective lens bases is smaller, thereby ensuring that the overall accuracy of the precision microscope reaches the effect, and the lens base body 1 and the lens barrel are more loosely matched under the same dimensional tolerance conditions, and it is also convenient to take out the lens base body 1 inside the lens barrel for actual assembly and use. Secondly, an end surface groove 12 is formed on the end surface of the lens base body 1. When the lens base body 1 needs to be disassembled, tweezers are used to align the end surface groove 12 of the lens base body 1 to rotate the lens base body 1 for disassembly.

[0031] As another embodiment provided by the present invention, threaded holes 13 for locking the lens 9 in the inner ring of the lens base body 1 are arranged in a circumferential array on the lens base body 1. The threaded holes 13 penetrate the external threaded surface 11 and are circumferentially spaced from the end surface grooves 12.

[0032] Specifically, Figure 1 As shown, a plurality of threaded holes 13 are arranged in a circular array on the lens base body 1, and the threaded holes 13 penetrate the external threaded surface 11. When the lens 9 needs to be assembled with the lens base body 1, the lens 9 can be placed into the lens base body 1 first, and then the fixing screws are rotated into the threaded holes 13. Different fixing screws are rotated and adjusted to push the lens 9 to the center of the lens base body 1. After the center is calibrated by a digital centering instrument, the lens 9 and the lens base body 1 are assembled. The plurality of threaded holes 13 are used to complete the fastening and adjustment of the lens 9, thereby improving the assembly efficiency.

[0033] As another embodiment provided by the present invention, a ring-shaped supporting portion 14 is coaxially arranged on the inner annular surface of the lens holder body 1 , and a concave arc groove is formed on the supporting portion 14 to fit the surface of the lens 9 .

[0034] Specifically, the inner ring surface of the lens holder body 1 is coaxially provided with an annular supporting portion 14, and a concave arc groove that fits the surface of the lens 9 is formed on the supporting portion 14. When the lens 9 is coaxially placed into the inner ring side of the lens holder body 1, the lens 9 moves axially forward so that the surface of the lens 9 contacts the concave arc groove of the supporting portion 14, thereby limiting the movement of the lens 9 and avoiding excessive movement of the lens 9 during assembly. Secondly, the concave arc groove that fits the surface of the lens 9 on the supporting portion 14 and fits with the surface of the lens 9 can further improve the coaxiality of the lens 9 and the lens holder body 1 when assembled, thereby further improving the assembly efficiency.

[0035] As another embodiment provided by the present invention, it also includes a matching seat 2, which can be divided into a contact ring portion 21, a limiting ring portion 22 and an end face ring portion 23. A contact ring groove 15 and a limiting ring groove 16 are opened on the lens base body 1. The contact ring portion 21 pushes the stepped position of the lens 9 into the lens base body 1 so that the limiting ring portion 22 coaxially contacts the limiting ring groove 16, and the end face ring portion 23 contacts the contact ring groove 15 so that the height of the end face ring portion 23 is lower than the end face of the lens base body 1.

[0036] Specifically, Figure 2 As shown, the matching seat 2 can be divided into a contact ring portion 21, a limiting ring portion 22 and an end face ring portion 23, and the lens base body 1 is provided with a contact ring groove 15 and a limiting ring groove 16. When the lens 9 and the lens base body 1 need to be assembled, the matching seat 2 can be first set on the rear side of the lens 9, so that the end of the contact ring portion 21 is in contact with the stepped portion of the lens 9, and then the matching seat 2 is pressed to axially move the lens 9 into the lens base body 1, thereby avoiding the wear of the lens 9 caused by pressing the light-transmitting surface of the lens 9 during assembly, and improving the protection of the lens 9. Secondly, after the matching seat 2 moves into the lens base body 1, the limiting ring portion 22 coaxially contacts the limiting ring groove 16, so that the limiting ring portion 22 and the limiting ring groove 16 are used to achieve coaxial correction of the matching seat 2 and the lens base body 1, further improving the coaxial alignment of the lens 9 on the matching seat 2 and the lens base body 1, and improving the assembly accuracy. When the lens 9 is completely pushed into the assembled position, the end face ring portion 23 of the matching seat 2 abuts against the contact ring groove 15 so that the height of the end face ring portion 23 is lower than the end face of the lens seat body 1, thereby improving the installation stability of the matching seat 2 and the lens seat body 1, and the end face of the matching seat 2 will not extend out of the end face of the lens seat body 1 to interfere with the assembly accuracy between multiple groups of lens seat bodies 1, which is convenient for actual assembly and use.

[0037] As another embodiment provided by the present invention, a connecting hole 222 is opened on the lens holder body 1 , one end of the connecting hole 222 is connected to between the contact ring portion 21 and the limit ring portion 22 , and the other end of the connecting hole 222 is connected to the surface of the end face ring portion 23 .

[0038] Specifically, Figure 5As shown, a connecting hole 222 is provided on the lens base body 1, one end of the connecting hole 222 is connected to between the contact ring portion 21 and the limit ring portion 22, and the other end of the connecting hole 222 is connected to the surface of the end face ring portion 23. When the lens 9 is installed to the assembly position in the lens base body 1 by the matching seat 2, one end of the connecting hole 222 is connected to the gap between the lens 9 and the lens base body 1, and the other end of the connecting hole 222 is connected to the end surface of the lens base body 1. Then, the opening where the connecting hole 222 is connected to the surface of the end face ring portion 23 can be sucked and cleaned by a cleaning device with suction negative pressure, so as to suck out and clean the dust or impurities stored in the gap between the lens 9 and the lens base body 1, so as to avoid the problem that the dust between the lens 9 and the lens base body 1 falls to the surface of the lens 9 after the assembly is completed, causing the lens 9 to be dirty, thereby improving the service life of the lens 9.

[0039] As another embodiment provided by the present invention, it also includes a flexible insertion member 3, which is arranged in the installation groove 221 of the matching seat 2, and the lens seat body 1 is provided with an insertion groove 131 connecting the threaded hole 13 and the limiting ring groove 16. The contact ring portion 21 pushes the lens 9 into the lens seat body 1 so that the flexible insertion member 3 follows the matching seat 2 and extends into the threaded hole 13 through the insertion groove 131, and the fixing screw is rotated into the threaded hole 13 to cut off the first end of the flexible insertion member 3 to be located between the fixing screw and the lens 9.

[0040] Specifically, Figure 2 As shown, the left end of the flexible insertion member 3 is the first end, the first end of the flexible insertion member 3 is the insertion portion 31, and the flexible insertion member 3 is arranged in the installation groove 221, and the insertion groove 131 connects the threaded hole 13 and the limiting ring groove 16. When the matching seat 2 is used to push the lens 9 into the lens seat body 1, the flexible insertion member 3 follows the matching seat 2 to move into the lens seat body 1, and the insertion portion 31 of the flexible insertion member 3 is inserted into the threaded hole 13 along the insertion groove 131. When the lens 9 is moved to the assembly position in the lens seat body 1, the fixing screw is used to rotate into the threaded hole 13. At this time, the fixing screw cuts off the insertion portion 31 of the flexible insertion member 3, and the insertion portion 31 falls into the threaded hole 13 so that the fragments of the insertion portion 31 are located between the fixing screw and the lens 9 to form a buffer, thereby avoiding the problem of the lens 9 being broken due to excessive pressure on the lens 9 caused by the fixing screw when rotating to fix the lens 9, thereby improving the protection of the lens 9. Secondly, since the flexible insertion member 3 will break in the threaded hole 13 after the set screw is rotated to tighten the lens 9, the flexible insertion member 3 can be used as a disposable consumable part and can be used as a judgment component for whether the lens assembly should be disassembled for the second time.

[0041] As another embodiment provided by the present invention, the flexible insertion member 3 is movably arranged in the installation groove 221, and a through hole 32 and a blocking portion 33 are arranged on the flexible insertion member 3. In the default state of the flexible insertion member 3, the through hole 32 is coaxial with the connecting hole 222, and the flexible insertion member 3 is squeezed and moved by the set screw so that the blocking portion 33 moves to block the connecting hole 222.

[0042] Specifically, Figure 6 As shown, the flexible insertion member 3 is provided with a through hole 32 and a blocking portion 33. When the matching seat 2 is used to push the lens 9 into the lens seat body 1, the flexible insertion member 3 follows the matching seat 2 to move into the lens seat body 1, and the insertion portion 31 of the flexible insertion member 3 is inserted into the threaded hole 13 along the insertion groove 131. At this time, the flexible insertion member 3 is in a default state, and the through hole 32 is coaxial with the connecting hole 222, so that the two ends of the connecting hole 222 are also connected to each other. The negative pressure suction component can be used to clean the dust in the lens seat body 1, and the set screw is used to rotate into the threaded hole 13. At this time, the set screw is The insertion portion 31 of the flexible insertion member 3 is cut off, and the insertion portion 31 falls into the threaded hole 13 so that the fragments of the insertion portion 31 are located between the fixing screw and the lens 9 to form a buffer. While the insertion portion 31 of the flexible insertion member 3 is squeezed, broken and cut off, the flexible insertion member 3 is also squeezed and pulled by the fixing screw so that the blocking portion 33 moves to block the connecting hole 222, thereby making the two ends of the connecting hole 222 no longer connected to each other. At this time, it is difficult for external dust to enter the lens base body 1 through the connecting hole 222, thereby completing the dust protection inside the lens base body 1 and further improving the protection of the lens 9.

[0043] Working principle:

[0044] First, the lens base body 1 is threadedly mounted on the threaded inner hole of the clamping tool, and after processing one end surface of the lens base body 1, the lens base body 1 is rotated and removed and reversely screwed into the clamping tool to reversely process the other end surface of the lens base body 1;

[0045] First, the matching seat 2 is set on the rear side of the lens 9, so that the end of the contact ring portion 21 is in contact with the stepped portion of the lens 9, and then the matching seat 2 is pressed to axially move the lens 9 into the lens seat body 1, and the flexible insertion member 3 follows the matching seat 2 to move into the lens seat body 1, and the insertion portion 31 of the flexible insertion member 3 is inserted into the threaded hole 13 along the insertion groove 131. At this time, the flexible insertion member 3 is in a default state, and the through hole 32 is coaxial with the connecting hole 222, so that the two ends of the connecting hole 222 are also connected to each other, and the negative pressure suction component can be used. To clean the dust in the lens base body 1, use a set screw to rotate into the threaded hole 13. At this time, the set screw cuts off the insertion portion 31 of the flexible insertion member 3, and the insertion portion 31 falls into the threaded hole 13 so that the fragments of the insertion portion 31 are located between the set screw and the lens 9 to form a buffer. While the insertion portion 31 of the flexible insertion member 3 is squeezed, broken and cut off, the flexible insertion member 3 is also squeezed and pulled by the set screw so that the blocking portion 33 moves to block the connecting hole 222, thereby making the two ends of the connecting hole 222 no longer connected to each other.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A threaded large-diameter objective lens holder, comprising a lens (9), characterized in that: It also comprises a lens base body (1), the outer annular surface of which is provided with an external threaded surface (11), and both end surfaces of the lens base body (1) are provided with end surface grooves (12) in a circumferential array.

2. A threaded large-diameter objective lens holder according to claim 1, characterized in that: The lens base body (1) is provided with a circumferential array of threaded holes (13) for locking the lens (9) in the inner ring of the lens base body (1); the threaded holes (13) penetrate the outer threaded surface (11), and the threaded holes (13) and the end surface grooves (12) are arranged at intervals in the circumferential direction.

3. A threaded large-diameter objective lens holder according to claim 2, characterized in that: An annular supporting portion (14) is coaxially arranged on the inner annular surface of the lens seat body (1), and a concave arc groove is provided on the supporting portion (14) for fitting the surface of the lens (9).

4. A threaded large-diameter objective lens holder according to claim 3, characterized in that: The invention also comprises a matching seat (2), which can be divided into a contact ring portion (21), a limiting ring portion (22) and an end face ring portion (23). The lens seat body (1) is provided with a contact ring groove (15) and a limiting ring groove (16). The contact ring portion (21) pushes the stepped position of the lens (9) into the lens seat body (1) so that the limiting ring portion (22) coaxially contacts the limiting ring groove (16), and the end face ring portion (23) contacts the contact ring groove (15) so that the height of the end face ring portion (23) is lower than the end face of the lens seat body (1).

5. The threaded large-diameter objective lens holder according to claim 4, characterized in that: The lens base body (1) is provided with a connecting hole (222), one end of the connecting hole (222) is connected to between the contact ring portion (21) and the limit ring portion (22), and the other end of the connecting hole (222) is connected to the surface of the end face ring portion (23).

6. A threaded large-diameter objective lens holder according to claim 5, characterized in that: The invention also comprises a flexible insertion member (3) which is arranged in the mounting groove (221) of the matching seat (2); the lens seat body (1) is provided with an insertion groove (131) which is connected with the threaded hole (13) and the limiting ring groove (16); the contact ring portion (21) pushes the lens (9) into the lens seat body (1) so that the flexible insertion member (3) follows the matching seat (2) and extends into the threaded hole (13) through the insertion groove (131); and the fixing screw is rotated into the threaded hole (13) so that the first end of the flexible insertion member (3) is cut off so as to be located between the fixing screw and the lens (9).

7. The threaded large-diameter objective lens holder according to claim 6, characterized in that: The flexible insertion member (3) is movably arranged in the installation groove (221); a through hole (32) and a blocking portion (33) are arranged on the flexible insertion member (3); in a default state of the flexible insertion member (3), the through hole (32) and the connecting hole (222) are coaxial; the flexible insertion member (3) is squeezed and moved by the set screw so that the blocking portion (33) moves to block the connecting hole (222).

8. The threaded large-diameter objective lens holder according to claim 1, characterized in that: The mirror base body (1) is a metal part.

9. The threaded large-diameter objective lens holder according to claim 4, characterized in that: The matching seat (2) is a metal part.

10. The threaded large-diameter objective lens holder according to claim 6, characterized in that: The flexible extending member (3) is a rubber member.

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