Locking mechanism for zoom collimator
By employing a locking device with a small gap fit, and using a locking elastic ring, locking ring, and locking knob design, the problem of inconvenient locking of the zoom collimator is solved, achieving a fast and stable locking effect and ensuring the stability of the optical system and the beam quality.
Patent Information
- Application Number
- CN202423160461.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The locking mechanism of existing zoom collimators is inconvenient to operate and can easily lead to lens misalignment, affecting beam quality and optical system stability.
The locking device, which employs a small clearance fit, includes a locking elastic ring, a locking ring, and a locking knob. It achieves rapid locking through axial compression, avoiding the influence of rotational torque, and combines mechanical self-locking with material friction to ensure stability.
It achieves a fast and efficient locking process, avoids lens misalignment, ensures the stability and beam quality of the optical system, and reduces interference with the optical system.
Smart Images
Figure CN223565970U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to optical collimator equipment technical field, especially a locking mechanism for zoom collimator. BACKGROUND
[0002] The collimator is an optical instrument for generating and adjusting the direction and shape of the light beam. It is usually composed of lenses, mirrors, lens barrels, adjustment knobs and other optical elements, which can focus the divergent light beam into a parallel light beam, making the light rays more concentrated and the direction more accurate, thereby improving the transmission efficiency of the light beam and the hitting accuracy of the target.
[0003] The zoom collimator, also known as the adjustable focus collimator, when in use, moves the two groups of independent lenses forward and backward by rotating the front and rear adjustment knobs to realize the collimation function of the zoom collimator. After the collimation of the input light is adjusted to the output, the relative position of the two groups of lenses needs to be kept unchanged, so the front and rear adjustment knobs need to be locked to ensure the stability of the light beam.
[0004] The existing locking mechanism sets radial screws on the front and rear adjustment knobs and uses glue head screws for locking. When locking, the hex wrench is used to tighten the screws to fix the front and rear adjustment knobs with the lens barrel (operation video: https: / / www.bilibili.com / video / BV1AjpMeyEUH / ). This locking mechanism has the disadvantages of inconvenient locking operation and unnecessary rotation of the corresponding adjustment knob when tightening the glue head screw, which may cause lens eccentricity and affect the quality of the light beam, thereby affecting the stability of the optical system.
[0005] Therefore, how to solve the locking problem of the zoom collimator in the actual application process and provide an efficient and stable locking mechanism is an urgent problem to be solved. UTILITY MODEL CONTENTS
[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a locking mechanism for a zoom collimator, which can not only realize rapid and effective locking action, but also minimize any interference to the optical system.
[0007] The utility model discloses a technical scheme that solves its technical problem is: a locking mechanism for zoom collimator, including lens barrel and the movable installation of front adjusting knob and rear adjusting knob in the lens barrel, the lens barrel is all through small clearance fit realizes axle hole connection with front adjusting knob, rear adjusting knob, the movable installation is used for locking front adjusting knob's front locking device and is used for locking rear adjusting knob's rear locking device on the barrel of the lens barrel between front adjusting knob and rear adjusting knob, front locking device and rear locking device respectively press from near to far including the locking elastic ring, locking ring and locking knob of mutual abutment according to the distance of front adjusting knob, rear adjusting knob, the locking elastic ring is abutted with the rear end of front adjusting knob, the front end of rear adjusting knob, and it is all set on the lens barrel with locking ring, the locking knob is movably connected on the lens barrel, and can move along the axial direction of lens barrel.
[0008] Further, the lens barrel sequentially includes a front barrel, an intermediate barrel and a rear barrel connected integrally from front to back, the front adjusting knob and the rear adjusting knob are connected to the outer circumferential wall of the front barrel and the rear barrel through small clearance fit to realize shaft hole connection, and the locking device is movably installed on the outer circumferential wall of the intermediate barrel.
[0009] Further, the outer surface of the intermediate barrel is sequentially provided with a first guide plane, a first thread, a second thread and a second guide plane from front to back, the locking ring for locking the front adjusting knob and the rear adjusting knob is sleeved on the first guide plane and the second guide plane respectively, and the locking knob for locking the front adjusting knob and the rear adjusting knob is threadedly connected to the outer circumferential wall of the intermediate barrel through the first thread and the second thread respectively.
[0010] Further, a plurality of guide grooves are uniformly arranged on the first guide plane and the second guide plane along the circumference, and a plurality of guide protrusions matched with the guide grooves are arranged on the locking ring.
[0011] Further, the inner part of the front barrel and the rear barrel is respectively provided with a small sliding sleeve and a large sliding sleeve, and the inner wall of the front barrel and the rear barrel is respectively matched with the outer wall of the small sliding sleeve and the large sliding sleeve through small clearance.
[0012] Further, the inner wall of the front adjusting knob and the rear adjusting knob is provided with a helical groove, the small sliding sleeve and the large sliding sleeve are respectively connected with a first threaded pin and a second threaded pin, the front barrel and the rear barrel are respectively provided with a strip-shaped groove parallel to the axis of the lens barrel, the first threaded pin is embedded in the helical groove of the inner wall of the front adjusting knob through the strip-shaped groove, and the second threaded pin is embedded in the helical groove of the inner wall of the rear adjusting knob through the strip-shaped groove, the first threaded pin and the second threaded pin are driven to slide in the strip-shaped groove along the axis of the lens barrel under the rotation of the helical groove and the guidance of the strip-shaped groove by rotating the front adjusting knob and the rear adjusting knob, and the small sliding sleeve and the large sliding sleeve are driven to move along the axis of the lens barrel.
[0013] Further, the locking knob is detachably installed on the locking device.
[0014] Further, the front end of the lens barrel is detachably connected with a front end cover, and the rear end of the lens barrel is detachably connected with a rear end cover, the front end cover covers the front end of the front adjusting knob, and the rear end cover covers the rear end of the rear adjusting knob.
[0015] Further, the front end of the front adjusting knob is provided with a first sunken groove, the front end cover is provided with a first boss extending towards the lens barrel and matched with the first sunken groove, the rear end of the rear adjusting knob is provided with a second sunken groove, and the rear end cover is provided with a second boss extending towards the lens barrel and matched with the second sunken groove.
[0016] Further, the locking elastic ring is an O-shaped ring.
[0017] The locking mechanism for the zoom collimator has the advantages that: the locking mechanism has simple structure and is convenient to use, after the front adjusting knob and the rear adjusting knob are rotated to drive the lens to realize focusing, the locking device composed of the locking elastic ring, the locking ring and the locking knob can quickly and efficiently realize the locking of the front locking knob and the rear locking knob, the adjusting knob is only subjected to axial extrusion force during the whole locking process, and is not affected by any rotation torque, the phenomenon that the adjusting knob is rotated to drive the lens to displace is avoided, the distance between the lenses previously set is not damaged, and then any interference on the optical system can be maximally reduced, and the stability of the optical system is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 Fig. 1 is a perspective structural schematic view of a locking mechanism for a zoom collimator;
[0019] Figure 2 Fig. 2 is an exploded schematic view of the locking mechanism for the zoom collimator; Figure 1
[0020] Figure 3 - is a schematic view of the perspective structure of the lens barrel;
[0021] Figure 4 - is a sectional view at the front locking device;
[0022] Figure 5 - is a sectional view at the rear locking device.
[0023] The above reference numerals: 1 - front end fixing screw, 2 - front end cover, 3 - front adjusting knob, 4 - front locking ring, 5 - first threaded pin, 6 - small sliding sleeve, 7 - lens barrel, 71 - front barrel, 72 - rear barrel, 73 - first guide plane, 74 - first thread, 75 - second thread, 76 - second guide plane, 77 - guide groove, 78 - front strip-shaped groove, 79 - rear strip-shaped groove, 8 - second threaded pin, 9 - large sliding sleeve, 10 - rear locking ring, 11 - rear end cover, 12 - rear end fixing screw, 13 - rear adjusting knob, 14 - rear locking elastic ring, 15 - rear locking knob, 16 - front locking knob, 17 - locking wrench, 18 - front locking elastic ring, 19 - first recess, 20 - first boss. DETAILED DESCRIPTION
[0024] The utility model will be further explained in connection with the drawings and examples, but these specific implementation schemes do not limit the protection scope of the utility model in any way.
[0025] Example 1
[0026] Referring to Figures 1-5 A locking mechanism for a zoom collimator, comprising a lens barrel 7, a front adjusting knob 3 and a rear adjusting knob 13, the lens barrel 7 comprises a front barrel 71, an intermediate barrel and a rear barrel 72 connected in one piece in sequence from front to back, the front adjusting knob 3 and the outer circumferential wall of the front barrel 71, and the rear adjusting knob 13 and the outer circumferential wall of the rear barrel 72 are connected through a small gap to realize shaft hole connection, so that the front adjusting knob 3 and the rear adjusting knob 13 can rotate on the front barrel 71 and the rear barrel 72 of the lens barrel 7.
[0027] The front end of the lens barrel 7 (i.e. the front end of the front barrel 71) is detachably connected with a front end cover 2 through a front end fixing screw 1, and the rear end (i.e. the rear end of the rear barrel 72) is detachably connected with a rear end cover 11 through a rear end fixing screw 12, the front end cover 2 is arranged at the front end of the front adjusting knob 3, and the rear end cover 11 is arranged at the rear end of the rear adjusting knob 13.
[0028] The front end of the front adjusting knob 3 is provided with a first recess 19, and the front end cover 2 is provided with a first boss 20 extending towards the lens barrel 7 and matched with the first recess 19. The front end cover 2 is covered on the front end of the front adjusting knob 3 through the matched connection of the first boss 20 and the first recess 19, and then the front end of the front cylinder body 71 inside the front adjusting knob 3 is connected with the front end cover 2 through the front end fixing screw 1, so that the axial movement of the front adjusting knob 3 is limited.
[0029] The rear end of the rear adjusting knob 13 is provided with a second recess, and the rear end cover 11 is provided with a second boss extending towards the lens barrel 7 and matched with the second recess. The rear end cover 11 is covered on the rear end of the rear adjusting knob 13 through the matched connection of the second boss and the second recess, and then the rear end of the rear cylinder body 72 inside the rear adjusting knob 13 is connected with the rear end cover 11 through the rear end fixing screw 12, so that the axial movement of the rear adjusting knob 13 is limited.
[0030] The lens barrel 7 is movably installed on the outer circumferential wall of the cylinder body (i.e. the outer circumferential wall of the intermediate cylinder body) between the front adjusting knob 3 and the rear adjusting knob 13, and is provided with a front locking device and a rear locking device. The front locking device is used for locking the front adjusting knob 3, and the rear locking device is used for locking the rear adjusting knob 13.
[0031] The outer surface of the intermediate cylinder body is sequentially provided with a first guide plane 73, a first thread 74, a second thread 75 and a second guide plane 76 from front to back.
[0032] The front locking device includes a front locking elastic ring 18, a front locking ring 4 and a front locking knob 16 abutting with each other from near to far according to the distance from the front adjusting knob 3. The front locking elastic ring 18 abuts with the rear end of the front adjusting knob 3 and is sleeved on the outer circumferential wall of the intermediate cylinder body. The front locking ring 4 is sleeved on the first guide plane 73 and forms a small gap with the intermediate cylinder body to realize the relative sliding between the front locking ring 4 and the intermediate cylinder body. The front locking knob 16 is movably connected on the outer circumferential wall of the intermediate cylinder body through the thread connection between the first thread 74 and the thread arranged on the inner wall of the front locking knob 16, and can move along the axial direction of the lens barrel 7. The front locking elastic ring 18 is an O-shaped ring. The front locking knob 16 is detachably provided with a locking wrench 17.
[0033] The rear locking device comprises, from near to far according to the distance from the rear adjusting knob 13, a rear locking elastic ring 14, a rear locking ring 10 and a rear locking knob 15 abutting with each other, the rear locking elastic ring 14 abuts with the front end of the rear adjusting knob 13 and is sleeved on the outer circumferential wall of the intermediate cylinder, the rear locking ring 10 is sleeved on the first guide plane 73 of the intermediate cylinder and is in small gap cooperation with the intermediate cylinder to realize the relative sliding between the rear locking ring 10 and the intermediate cylinder, and the rear locking knob 15 is movably connected to the outer circumferential wall of the intermediate cylinder in a threaded connection mode through the second thread 75 and the thread arranged on the inner wall thereof and can move along the axial direction of the lens barrel 7. The rear locking elastic ring 14 is an O-shaped ring. The rear locking knob 15 is detachably provided with a locking wrench 17.
[0034] In the above scheme, when the distance between the lenses mounted on the small sliding sleeve 6 and the large sliding sleeve 9 is adjusted to the position by rotating the front adjusting knob 3 and the rear adjusting knob 13, in order to realize the locking of the front adjusting knob 3 and the rear adjusting knob 13, the front locking knob 16 and the rear locking knob 15 are rotated to move the front locking knob 16 and the rear locking knob 15 to the front adjusting knob 3 and the rear adjusting knob 13 respectively, to synchronously push the front adjusting ring and the rear adjusting ring to translate to the front adjusting knob 3 and the rear adjusting knob 13 respectively, and to gradually extrude the front locking elastic ring 18 and the rear locking elastic ring 14, so that the front locking elastic ring 18 and the rear locking elastic ring 14 are extruded and deformed, the friction between the front locking elastic ring 18 and the front adjusting knob 3 and the friction between the rear locking elastic ring 14 and the rear adjusting knob 13 are gradually increased, and the locking effect of the front locking knob 16 and the rear locking knob 15 is realized. The front locking device and the rear locking device can quickly and efficiently realize the locking of the front locking knob 16 and the rear locking knob 15, and the locking efficiency is improved.
[0035] A plurality of guide grooves 77 (4 in the embodiment) are uniformly arranged on the first guide plane 73 and the second guide plane 76 along the circumference, and a plurality of (4 in the embodiment) guide protrusions matched with the guide grooves 77 are arranged on the front locking ring 4 and the rear locking ring 10.
[0036] When the locking process is realized, the front locking ring 4 and the rear locking ring 10 are subjected to the pushing force transmitted by the front locking knob 16 and the rear locking knob 15. In the above scheme, the guide grooves 77 and the guide protrusions matched with the guide grooves 77 are arranged to limit the movement direction of the front locking ring 4 and the rear locking ring 10, so that the front locking ring 4 and the rear locking ring 10 can only move along the axial direction of the lens barrel 7.
[0037] The front locking ring 4 and the rear locking ring 10 can only move along the axis direction of the lens barrel 7, on the one hand, the axial reaction force from the front locking ring 4 and the rear locking ring 10 is transmitted to the front locking knob 16 and the rear locking knob 15 through the threaded pair structure, a stable self-locking mechanism is formed between the threads, which effectively prevents the accidental release of the locking state; at the same time, the front locking elastic ring 18 and the rear locking elastic ring 14 generate friction force with the contact surfaces of the front locking ring 4 and the front adjusting knob 3 and the rear locking ring 10 and the rear adjusting knob 13 during the extrusion process, thereby realizing the stable locking effect of the front adjusting knob 3 and the rear adjusting knob 13. This method combines the dual advantages of mechanical self-locking and material friction, ensuring the stability and safety of the front adjusting knob 3 and the rear adjusting knob 13 in the locked state; on the other hand, it ensures that all reaction forces are transmitted along the axial direction, and only axial force is transmitted to the front adjusting knob 3 and the rear adjusting knob 13, so that the front adjusting knob 3 and the rear adjusting knob 13 are only subjected to axial extrusion from the front locking ring 4 and the rear locking ring 10, and are not affected by any rotational torque. Avoid unnecessary rotation of the front adjusting knob 3 and the rear adjusting knob 13 in the locked state, effectively prevent the phenomenon that the rotation of the adjusting knob drives the displacement of the lens, so that the previously set distance between the lenses is not destroyed, thereby minimizing any interference to the optical system and ensuring the stability of the optical system.
[0038] The inner part of the front barrel 71 and the rear barrel 72 is respectively provided with a small sliding sleeve 6 and a large sliding sleeve 9, and the inner wall of the front barrel 71 and the rear barrel 72 is matched with the outer wall of the small sliding sleeve 6 and the large sliding sleeve 9 with a small gap, so that the small sliding sleeve 6 and the large sliding sleeve 9 can move in the lens barrel 7. The small sliding sleeve 6 and the large sliding sleeve 9 can be installed with lenses (the installation method of the lenses directly uses the existing installation structure, such as clamping, screw connection, etc., which will not be described one by one), the movement of the small sliding sleeve 6 and the large sliding sleeve 9 drives the movement of the lenses, and the distance between the lenses is adjusted.
[0039] The inner wall of the front adjusting knob 3 and the rear adjusting knob 13 is provided with a helical groove, the small sliding sleeve 6 is symmetrically connected with a pair of first threaded pins 5, the large sliding sleeve 9 is symmetrically connected with a pair of second threaded pins 8, and the front barrel 71 is symmetrically provided with a pair of front strip grooves 78 which are parallel to the axis of the lens barrel 7 and penetrate the front barrel 71, and the rear barrel 72 is symmetrically provided with a pair of rear strip grooves 79 which are parallel to the axis of the lens barrel 7 and penetrate the rear barrel 72.
[0040] The first threaded pin 5 is embedded in the helical groove in the inner wall of the front adjusting knob 3 through the front strip-shaped groove 78 away from the small sliding sleeve 6, and the second threaded pin 8 is embedded in the helical groove in the inner wall of the rear adjusting knob 13 through the rear strip-shaped groove 79 away from the large sliding sleeve 9. By rotating the front adjusting knob 3 and the rear adjusting knob 13, the first threaded pin 5 and the second threaded pin 8 can move along the helical groove, and under the guidance of the front strip-shaped groove 78 and the rear strip-shaped groove 79, the rotating movement of the first threaded pin 5 and the second threaded pin 8 is eliminated, so that the first threaded pin 5 and the second threaded pin 8 only move along the axis direction of the lens barrel 7 in the front strip-shaped groove 78 and the rear strip-shaped groove 79, thereby driving the small sliding sleeve 6 and the large sliding sleeve 9 connected with the first threaded pin 5 and the second threaded pin 8 to move along the axis direction of the lens barrel 7 in the front barrel 71, so as to drive the front and rear translation of the lenses installed in the small sliding sleeve 6 and the large sliding sleeve 9, and realize the adjustment of the distance between the lenses to adjust the beam divergence angle.
[0041] The utility model relates to a working principle and use method of locking mechanism for zoom collimator,
[0042] When the utility model works, first drive the small sliding sleeve 6 and the large sliding sleeve 9 to move along the axis direction of the lens barrel 7 in the lens barrel 7 by rotating the front adjusting knob 3 and the rear adjusting knob 13, realize the adjustment of the distance between the lenses installed on the small sliding sleeve 6 and the large sliding sleeve 9, when the adjustment is in place, need to lock the front adjusting knob 3 and the rear adjusting knob 13, rotate the front locking knob 16 and the rear locking knob 15, make the front locking knob 16, the rear locking knob 15 respectively move to the direction of the front adjusting knob 3, the rear adjusting knob 13, under the joint action of the guide recess 77 and the guide protrusion, make the front adjusting ring, the rear adjusting ring respectively translate to the direction of the front adjusting knob 3, the rear adjusting knob 13 by the thrust of the front locking knob 16, the rear locking knob 15, and gradually extrude the front locking elastic ring 18, the rear locking elastic ring 14, make the front locking elastic ring 18, the rear locking elastic ring 14 be extruded and deformed, gradually increase the friction force between the front locking elastic ring 18 and the front adjusting knob 3, the rear locking elastic ring 14 and the rear adjusting knob 13, realize the locking effect of the front locking knob 16 and the rear locking knob 15.
[0043] It should be noted that the terms "first", "second" and the like are used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
[0044] The words "upper", "lower", "left", "right", "front", "back", "vertical", "inner", "outer" and the like that are used herein are used for convenience and are not intended to refer to the orientation of the device in actual use. Actual orientation can vary depending on the placement of the device and is merely used to facilitate the description of the present application and to simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0045] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the present application.
Claims
1. A locking mechanism for a zoom collimator, comprising a lens barrel, a front adjusting knob and a rear adjusting knob movably mounted outside the lens barrel, the lens barrel and the front adjusting knob and the rear adjusting knob are connected through a small gap fit to achieve shaft hole connection, the front locking device for locking the front adjusting knob and the rear locking device for locking the rear adjusting knob are movably mounted on the barrel body of the lens barrel between the front adjusting knob and the rear adjusting knob, characterized in that, The front locking device and the rear locking device respectively comprise, in order from the front to the rear, a locking elastic ring, a locking ring and a locking knob abutting with each other at a distance from the front adjusting knob and the rear adjusting knob, the locking elastic ring abutting with the rear end of the front adjusting knob and the front end of the rear adjusting knob, and both of them are sleeved on the lens barrel, the locking knob is movably connected to the lens barrel and can move along the axial direction of the lens barrel.
2. The locking mechanism for a zoom collimator of claim 1, wherein, The lens barrel comprises, in order from the front to the rear, a front barrel body, an intermediate barrel body and a rear barrel body connected integrally, the front adjusting knob and the rear adjusting knob are connected to the front barrel body and the rear barrel body respectively through a small gap fitting to realize the shaft hole connection, and the locking device is movably mounted on the outer circumferential wall of the intermediate barrel body.
3. The locking mechanism for a zoom collimator of claim 2, wherein, The outer surface of the intermediate barrel body is provided, in order from the front to the rear, with a first guide plane, a first thread, a second thread and a second guide plane, the locking ring for locking the front adjusting knob and the rear adjusting knob is sleeved on the first guide plane and the second guide plane respectively, and the locking knob for locking the front adjusting knob and the rear adjusting knob is threadedly connected to the outer circumferential wall of the intermediate barrel body through the first thread and the second thread respectively.
4. The locking mechanism for a zoom collimator of claim 3, wherein, A plurality of guide grooves are uniformly arranged on the first guide plane and the second guide plane along the circumference, and a plurality of guide protrusions matched with the guide grooves are arranged on the locking ring.
5. The locking mechanism for a zoom collimator of claim 2, wherein, The inner part of the front barrel body and the rear barrel body is respectively provided with a small sliding sleeve and a large sliding sleeve, and the inner wall of the front barrel body and the rear barrel body is respectively matched with the outer wall of the small sliding sleeve and the large sliding sleeve through a small gap.
6. The locking mechanism for a zoom collimator of claim 5, wherein, The inner wall of the front adjusting knob and the rear adjusting knob is respectively provided with a helical groove, the small sliding sleeve and the large sliding sleeve are respectively connected with a first threaded pin and a second threaded pin, a strip-shaped groove parallel to the axis of the lens barrel is arranged on the front barrel body and the rear barrel body, one end of the first threaded pin away from the small sliding sleeve is embedded in the helical groove of the inner wall of the front adjusting knob through the strip-shaped groove, and one end of the second threaded pin away from the large sliding sleeve is embedded in the helical groove of the inner wall of the rear adjusting knob through the strip-shaped groove, by rotating the front adjusting knob and the rear adjusting knob, the first threaded pin and the second threaded pin are driven to slide in the strip-shaped groove along the axial direction of the lens barrel under the rotation of the helical groove and the guidance of the strip-shaped groove, and then the small sliding sleeve and the large sliding sleeve are driven to move along the axial direction of the lens barrel.
7. The locking mechanism for a zoom collimator of claim 1, wherein, The locking knob is detachably mounted with a locking wrench.
8. The locking mechanism for a zoom collimator of claim 1, wherein, The front end of the lens barrel is detachably connected with a front end cover, and the rear end of the lens barrel is detachably connected with a rear end cover, the front end cover covers the front end of the front adjusting knob, and the rear end cover covers the rear end of the rear adjusting knob.
9. The locking mechanism for a zoom collimator of claim 8, wherein, The front end of the front adjusting knob is provided with a first sunken groove, the front end cover is provided with a first boss extending towards the lens barrel and matched with the first sunken groove, the rear end of the rear adjusting knob is provided with a second sunken groove, and the rear end cover is provided with a second boss extending towards the lens barrel and matched with the second sunken groove.
10. A locking mechanism for a zoom collimator according to any one of claims 1-9, characterized in that, The locking elastic ring is an O-shaped ring.