A collimating mirror fixing tool

Abstract

This invention belongs to the field of laser processing technology and discloses a collimating lens fixing fixture, including a lens barrel assembly and a lens mount assembly. The lens barrel assembly includes an arc-shaped positioning surface, and the lens mount assembly has a receiving cavity with two opposing positioning cavity walls. The lens barrel assembly can be inserted into the receiving cavity along a first direction, so that the arc-shaped positioning surface is tangent to the two positioning cavity walls, ensuring that the center of the collimating lens in the lens barrel assembly is on the same central axis as the center of other collimating lenses on the laser processing head. One of the lens barrel assembly and the lens mount assembly is provided with an elastic snap-fit ​​element, and the other is provided with a slot. The elastic snap-fit ​​element can be engaged into the slot along a second direction under its own elastic force, thereby achieving a firm fixation of the lens barrel assembly and the lens mount assembly, improving the efficiency of installing and removing the lens barrel assembly on the lens mount assembly, and thus increasing the speed when replacing the collimating lens, avoiding secondary contamination of the collimating lens and the core cavity of the laser processing head.

Description

Technical Field

[0001] This invention relates to the field of laser processing technology, and in particular to a collimating lens fixing fixture. Background Technology

[0002] Laser cutting, as a non-contact, direct forming processing method, is superior to traditional mechanical cutting. The cut parts will not deform or be damaged due to stress. It produces less dust, has precise positioning, and the finished products are free of burrs and rough edges, resulting in excellent quality.

[0003] In laser processing, the cutting of metal sheets relies on optical energy and gas purging or the supply of cutting reaction gas. Among these, optical collimation and focusing are the core components of the entire laser processing head. During the cutting process, the collimating lens is constantly moving to adjust the laser's focal point, thus adapting to the cutting requirements of different materials. Therefore, the positional accuracy of the collimating lens is an extremely important factor affecting processing quality.

[0004] Even slight displacement of the collimating lens during assembly or movement can significantly impact cutting accuracy and finished product quality, resulting in unnecessary losses. Existing collimating lenses suffer from low positioning accuracy during assembly and are prone to positional shifts during movement. Furthermore, collimating lenses require periodic replacement. When a collimating lens becomes contaminated or damaged, manual replacement is necessary. For existing collimating lens fixtures, the disassembly and assembly process is cumbersome, time-consuming, and leads to secondary contamination of the new lens and the core cavity. Summary of the Invention

[0005] The purpose of this invention is to provide a collimating lens fixing fixture, which improves the positioning accuracy of the collimating lens, ensures that the collimating lens does not shift position during movement, simplifies the disassembly and assembly process, increases the speed when replacing the lens, and avoids secondary contamination of the collimating lens and the core cavity of the laser processing head.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A collimating lens fixing fixture, comprising:

[0008] A lens barrel assembly, the inner cavity of which is fixed with a collimating lens, the lens barrel assembly including an arc-shaped positioning surface;

[0009] The lens mount assembly has a receiving cavity with two opposing positioning cavity walls. The lens barrel assembly can be inserted into the receiving cavity along a first direction so that the arc positioning surface is tangent to the two positioning cavity walls.

[0010] One of the lens barrel assembly and the lens mount assembly is provided with an elastic snap-fit ​​element, and the other is provided with a slot. The elastic snap-fit ​​element can be snapped into the slot along a second direction under its own elastic force. The first direction and the second direction are perpendicular.

[0011] As a preferred embodiment of the collimating lens fixing fixture provided by the present invention, one of the lens barrel assembly and the lens mount assembly is provided with a guide groove, and the other of the lens barrel assembly and the lens mount assembly is provided with a guide plunger, the guide plunger being able to slide and engage with the guide groove along the first direction.

[0012] As a preferred embodiment of the collimator fixing fixture provided by the present invention, the guide groove is connected to a first enlarged channel, the width of the first enlarged channel gradually increases in the direction away from the guide groove, and the guide plunger can enter the guide groove along the first enlarged channel.

[0013] As a preferred embodiment of the collimator fixing fixture provided by the present invention, a spherical head is provided at one end of the guide plunger facing the bottom wall of the guide groove.

[0014] As a preferred embodiment of the collimating lens fixing fixture provided by the present invention, positioning grooves are provided on the two opposite cavity walls of the receiving cavity, and positioning protrusions are provided on the opposite sides of the lens barrel assembly. The positioning protrusions can press against the groove wall of the positioning groove along a third direction, which is perpendicular to the first direction and the second direction.

[0015] As a preferred embodiment of the collimator fixing fixture provided by the present invention, the guide groove is connected to the limiting inclined groove, the limiting inclined groove has a first pushing wall, and the guide plunger can enter the limiting inclined groove along the guide groove and abut against the first pushing wall so that the positioning protrusion is pressed against the groove wall of the positioning groove.

[0016] The guide groove is disposed on the lens barrel assembly, and the limiting inclined groove is inclined in a direction close to the positioning protrusion; or...

[0017] The guide groove is disposed on the mirror mount assembly, and the limiting groove is inclined in a direction away from the positioning protrusion.

[0018] As a preferred embodiment of the collimator fixing fixture provided by the present invention, it further includes a disassembly and assembly component. The lens barrel assembly has an installation cavity along the second direction. The elastic snap-fit ​​member is movably inserted into the installation cavity. The disassembly and assembly component includes a cam portion. The end of the elastic snap-fit ​​member away from the slot is slidably in contact with the cam portion. The elastic snap-fit ​​member is disengaged from the slot by rotating the cam portion.

[0019] As a preferred embodiment of the collimator fixing fixture provided by the present invention, the disassembly and assembly assembly further includes a rotating disk with a curved groove to form the cam portion. The end of the elastic snap-fit ​​member away from the snap-fit ​​groove is provided with a guide protrusion, which is inserted into the curved groove and slides in cooperation with the cam portion.

[0020] As a preferred embodiment of the collimator fixing fixture provided by the present invention, the elastic snap-fit ​​component includes a frustum, and the snap-fit ​​groove has a second push wall. The second push wall can abut against the inclined surface of the frustum so that the arc positioning surface is pressed against the positioning cavity wall.

[0021] As a preferred embodiment of the collimator fixing fixture provided by the present invention, the cavity wall of the receiving cavity is provided with a limiting pin, and the lens barrel assembly is provided with a communicating pin hole and a second enlarged channel, and the limiting pin can enter the pin hole along the second enlarged channel.

[0022] The beneficial effects of this invention are:

[0023] This invention provides a collimating lens fixing fixture, including a lens barrel assembly and a lens mount assembly. A collimating lens is installed inside the cavity of the lens barrel assembly. The lens barrel assembly provides positioning and fixing for the collimating lens inside. The lens barrel assembly and the lens mount assembly cooperate to form a whole fixed on a moving base, capable of moving within a certain range to adjust the laser focus. The lens barrel assembly includes an arc-shaped positioning surface, and the lens mount assembly has a receiving cavity with two opposing positioning cavity walls. The lens barrel assembly can be inserted into the receiving cavity along a first direction, such that the arc-shaped positioning surface is tangent to the two positioning cavity walls. The tangency between the arc-shaped positioning surface on the lens barrel assembly and the two positioning cavity walls on the lens mount assembly ensures positioning accuracy, that is, ensures that the center of the collimating lens inside the lens barrel assembly is on the same central axis as the centers of other collimating lenses on the laser processing head. Furthermore, one of the lens barrel assembly and the lens mount assembly is provided with a flexible snap-fit ​​element, and the other is provided with a slot. The flexible snap-fit ​​element can engage with the slot along a second direction under its own elastic force, thereby achieving a firm fixation between the lens barrel assembly and the lens mount assembly. The first and second directions are perpendicular, so that the cooperation between the flexible snap-fit ​​element and the slot can prevent the lens barrel assembly from detaching from the lens mount assembly along the first direction. Moreover, the flexible snap-fit ​​element can engage with the slot under its own elastic force, improving the efficiency of installing and removing the lens barrel assembly from the lens mount assembly, thereby increasing the speed when replacing the collimating lens and avoiding secondary contamination of the collimating lens and the core cavity of the laser processing head. Attached Figure Description

[0024] Figure 1 This is an overall schematic diagram of the collimating lens fixing fixture provided in a specific embodiment of the present invention;

[0025] Figure 2 yes Figure 1 Top view;

[0026] Figure 3 This is an exploded view of the collimating lens fixing fixture provided in a specific embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the lens barrel assembly provided in a specific embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the lens mount assembly of the lens barrel assembly provided in a specific embodiment of the present invention;

[0029] Figure 6 yes Figure 2 Cross-sectional view along the AA direction;

[0030] Figure 7 This is a cross-sectional view of the collimating lens fixing fixture provided in a specific embodiment of the present invention, along the direction perpendicular to the second direction;

[0031] Figure 8 This is a schematic diagram of the connection between the elastic snap-fit ​​component and the cam portion provided in a specific embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the cooperation between the elastic snap-fit ​​component and the slot provided in a specific embodiment of the present invention;

[0033] Figure 10 This is a structural schematic diagram (hidden spring) of the elastic snap-fit ​​component provided in a specific embodiment of the present invention;

[0034] Figure 11 This is a first view of the rotating disk provided in a specific embodiment of the present invention;

[0035] Figure 12 This is a second view of the rotating disk provided in a specific embodiment of the present invention.

[0036] In the picture:

[0037] 1- Lens tube assembly; 2- Lens mount assembly; 3- Assembly / disassembly assembly;

[0038] 11-Arc positioning surface; 12-Elastic snap-fit ​​component; 13-Guide groove; 14-First enlarged channel; 15-Positioning protrusion; 16-Limiting inclined groove; 17-Mounting cavity; 18-Pin hole; 19-Second enlarged channel;

[0039] 121-Guide protrusion; 122-Frustum; 123-Snap pin; 124-Spring;

[0040] 161 - First jacking wall; 162 - First trench wall;

[0041] 21-Receiving cavity; 22-Slot; 23-Guide plunger; 231-Spherical head; 24-Positioning groove; 25-Limiting pin;

[0042] 211 - Positioning cavity wall; 221 - Second push wall; 222 - Second groove wall;

[0043] 31-Rotating disk; 32-Screwing part; 33-Cap;

[0044] 311 - Cam section; 312 - Curved groove;

[0045] 100-collimating lens. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0047] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0050] like Figures 1 to 3 As shown, this embodiment provides a collimating lens fixing fixture, including a lens barrel assembly 1 and a lens mount assembly 2. A collimating lens 100 is installed inside the cavity of the lens barrel assembly 1, which provides positioning and fixing for the collimating lens 100. The lens barrel assembly 1 and the lens mount assembly 2 cooperate to form a whole fixed on a moving base, capable of moving within a certain range to adjust the laser focus.

[0051] See Figure 3 The lens barrel assembly 1 includes an arc-shaped positioning surface 11, and the lens mount assembly 2 has a receiving cavity 21. The receiving cavity 21 has two opposing positioning cavity walls 211. The lens barrel assembly 1 can be inserted into the receiving cavity 21 along a first direction, such that the arc-shaped positioning surface 11 is tangent to the two positioning cavity walls 211. Figure 2 The state shown is as follows. The tangency of the arc-shaped positioning surface 11 on the lens barrel assembly 1 with the two positioning cavity walls 211 on the lens mount assembly 2 ensures positioning accuracy; that is, it ensures that the center of the collimating lens 100 inside the lens barrel assembly 1 is on the same central axis as the centers of the other collimating lenses 100 on the laser processing head. Furthermore, one of the lens barrel assembly 1 and the lens mount assembly 2 is provided with an elastic locking member 12, and the other with a locking groove 22. The elastic locking member 12 can engage with the locking groove 22 along the second direction under its own elastic force, thereby achieving a firm fixation between the lens barrel assembly 1 and the lens mount assembly 2. The first and second directions are perpendicular, so that the cooperation between the elastic locking member 12 and the locking groove 22 prevents the lens barrel assembly 1 from detaching from the lens mount assembly 2 along the first direction. Moreover, the elastic snap-fit ​​12 can be snapped into the slot 22 under its own elastic force, which improves the efficiency of installing and removing the lens barrel assembly 1 on the lens mount assembly 2, thereby increasing the speed when replacing the collimating lens 100 and avoiding secondary contamination of the collimating lens 100 and the core cavity of the laser processing head.

[0052] In this embodiment, see Figure 2 The elastic snap-fit ​​element 12 is disposed on the lens barrel assembly 1, and the slot 22 is formed on the lens base assembly 2 by the inward recess of the cavity wall of the receiving cavity 21. In other embodiments, the elastic snap-fit ​​element 12 may also be disposed on the lens base assembly 2, and the aforementioned slot 22 may be formed on the lens barrel assembly 1 accordingly.

[0053] See Figure 1 In this embodiment, for ease of description, the first direction is defined as direction a, the second direction as direction b, and the third direction as direction c. Directions a, b, and c are perpendicular to each other.

[0054] Optionally, see Figure 3 and Figure 4The lens barrel assembly 1 has a guide groove 13 along the first direction (direction a), and the lens mount assembly 2 has a guide plunger 23, which protrudes relative to the cavity wall of the receiving cavity 21. When the lens barrel assembly 1 is inserted into the receiving cavity 21 of the lens mount assembly 2 along the first direction, the guide plunger 23 can slide and engage with the guide groove 13 along the first direction to provide guidance and prevent displacement.

[0055] In this embodiment, the lens barrel assembly 1 has guide grooves 13 on both opposite sides along the second direction (b direction), and two guide grooves 13 are spaced apart on each side along the third direction (c direction). Accordingly, see Figure 3 and Figure 5 The receiving cavity 21 of the lens mount assembly 2 has two guide plungers 23 protruding from its two opposite cavity walls along the second direction (b direction). The four guide plungers 23 correspond one-to-one with the four guide grooves 13 mentioned above and can slide together, which can effectively improve the guiding accuracy and thus improve the positioning accuracy of the lens barrel assembly 1 relative to the lens mount assembly 2.

[0056] Of course, in other embodiments, the guide groove 13 can also be disposed on the lens mount assembly 2, and the guide plunger 23 can be disposed on the lens barrel assembly 1, which can also play a guiding role.

[0057] Optionally, see Figure 3 and Figure 4 Each guide groove 13 is connected to a first enlarged channel 14. That is, the first enlarged channel 14 is disposed on the lens barrel assembly 1 and communicates with the guide groove 13. The width of the first enlarged channel 14 gradually increases in the direction away from the guide groove 13, forming a trumpet shape, so that the guide plunger 23 can enter the guide groove 13 along the first enlarged channel 14. By setting the first enlarged channel 14, when the lens barrel assembly 1 is inserted into the receiving cavity 21, the guide plunger 23 on the lens mount assembly 2 can quickly and easily enter the guide groove 13, speeding up and simplifying the operation process.

[0058] Optionally, see Figure 5 Each of the two opposing cavity walls of the receiving cavity 21 is provided with a positioning groove 24, which extends along the first direction. See also Figure 4 The lens barrel assembly 1 has positioning protrusions 15 on both opposite sides. The positioning protrusions 15 protrude outward from the two side walls of the lens barrel assembly 1 and extend in a strip shape along a first direction. (See also...) Figure 6 and Figure 8 The positioning protrusion 15 can press against the groove wall of the positioning groove 24 in the third direction (direction c) to achieve positioning of the lens barrel assembly 1 and the lens mount assembly 2 in the third direction, and prevent unnecessary displacement of the lens barrel assembly 1 relative to the lens mount assembly 2 in the third direction.

[0059] Optionally, in this embodiment, see Figure 4The end of the guide groove 13 furthest from the first enlarged channel 14 is connected to a limiting groove 16, and the limiting groove 16 is inclined toward the positioning protrusion 15. (Refer to...) Figure 4 In the orientation, the limiting groove 16 slopes upwards from the guide groove 13. See also Figure 6 and Figure 7 The two opposite walls of the limiting groove 16 are the first pushing wall 161 and the first groove wall 162, respectively. The guide plunger 23 can enter the limiting groove 16 along the guide groove 13 and abut against the first pushing wall 161, so that the positioning protrusion 15 presses against the groove wall of the positioning groove 24. Specifically, after the lens barrel assembly 1 is installed in place, the guide plunger 23 is located in the limiting groove 16 and abuts against the first pushing wall 161 of the limiting groove 16, but does not contact the first groove wall 162 of the limiting groove 16. The purpose is to ensure that after the lens barrel assembly 1 and the lens mount assembly 2 are locked, the guide plunger 23 will exert a force on the first pushing wall 161 in a third direction, as shown in the figure. Figure 6 In the orientation, that is, the guide plunger 23 will give the first push wall 161 a downward force so that the positioning protrusion 15 presses against the groove wall of the positioning groove 24.

[0060] In other embodiments, if the guide groove 13 is disposed on the lens mount assembly 2 and the guide plunger 23 is disposed on the lens barrel assembly 1, then the limiting inclined groove 16 communicating with the guide groove 13 is inclined in a direction away from the positioning protrusion 15, so that after the lens barrel assembly 1 and the lens mount assembly 2 are locked, the guide plunger 23 can give the first push wall 161 a force in a third direction, thereby pressing the positioning protrusion 15 against the groove wall of the positioning groove 24.

[0061] Preferably, see Figure 3 and Figure 5 In this embodiment, a spherical head 231 is provided at one end of the guide plunger 23 facing the bottom wall of the guide groove 13. During the insertion of the lens barrel assembly 1 into the receiving cavity 21, the guide plunger 23 sequentially enters the first enlarged channel 14, the guide groove 13, and the limiting inclined groove 16. During this process, only the spherical head 231 of the guide plunger 23 makes tangential contact with the inner walls of the first enlarged channel 14, the guide groove 13, and the limiting inclined groove 16, and the contact mode is point-to-surface contact, so as to minimize the contact area when the lens barrel assembly 1 is installed on the lens mount assembly 2. When disassembling the lens barrel assembly 1, the spherical head 231 of the guide plunger 23 sequentially makes tangential contact with the inner walls of the limiting inclined groove 16, the guide groove 13, and the first enlarged channel 14, and the contact mode is also point-to-surface contact, so as to minimize the contact area when disassembling the lens barrel assembly 1, so as to minimize the generation of dust during the installation and disassembly of the lens barrel assembly 1, prevent secondary contamination of the collimating lens 100 or the core cavity of the laser processing head, and avoid unnecessary losses.

[0062] In this embodiment, see Figure 4 and Figure 8 The lens barrel assembly 1 has a mounting cavity 17 along the second direction, and the elastic snap-fit ​​member 12 is movably inserted into the mounting cavity 17. The elastic snap-fit ​​member 12 is connected to a disassembly and assembly assembly 3, which allows the elastic snap-fit ​​member 12 to be inserted into or disengaged from the slot 22. Specifically, the disassembly and assembly assembly 3 includes a cam portion 311, and the end of the elastic snap-fit ​​member 12 away from the slot 22 is slidably in contact with the cam portion 311. When it is necessary to remove the lens barrel assembly 1 from the lens mount assembly 2 to replace the collimating lens 100, the elastic snap-fit ​​member 12 can be moved away from the slot 22 by rotating the cam portion 311 until it disengages from the slot 22. Subsequently, the lens barrel assembly 1 can be removed, which is simple and easy to operate, improving the efficiency of disassembly and replacement.

[0063] Furthermore, the assembly / disassembly component 3 includes a rotating disk 31. A curved groove 312 is formed on the rotating disk 31 to create a cam portion 311. A guide protrusion 121 is provided at the end of the elastic locking member 12 away from the locking groove 22. The guide protrusion 121 is inserted into the curved groove 312 and slides in engagement with the cam portion 311. That is, after the curved groove 312 is formed on the rotating disk 31, the groove wall of the curved groove 312 becomes the top surface of the cam portion 311. The guide protrusion 121 of the elastic locking member 12 is confined within the curved groove 312 and slides in engagement with the top surface of the cam portion 311. This arrangement is structurally reasonable and compact, saving space.

[0064] See Figure 10 The elastic snap-fit ​​component 12 includes a snap-fit ​​pin 123, one end of which is provided with a semi-cylinder, and the semi-cylinder is coaxially arranged with the snap-fit ​​pin 123. A guide protrusion 121 protrudes from the cross-section of the semi-cylinder, resulting in a compact and reasonable structure.

[0065] Optionally, see Figure 9 A cone 122 is provided at the end of the locking pin 123 away from the guide protrusion 121. The two opposite walls of the slot 22 along the first direction (direction a) are the second push wall 221 and the second slot wall 222, respectively. When the cone 122 of the elastic locking member 12 is engaged in the slot 22 to lock the lens barrel assembly 1 and the lens mount assembly 2, the inclined surface of the cone 122 abuts against the second push wall 221 of the slot 22, while the cone 122 does not contact the second slot wall 222 of the slot 22, so that the second push wall 221 can provide a pushing force to the cone 122 along the first direction. (Refer to...) Figure 9 The direction of the thrust is upward, so that the arc positioning surface 11 of the lens barrel assembly 1 is pressed against the positioning cavity wall 211 of the lens mount assembly 2, ensuring that the lens barrel assembly 1 will not have unnecessary displacement in the first direction during the movement.

[0066] See Figure 8 and Figure 9Two elastic locking elements 12 are provided. A slot 22 is formed on each of the two opposite cavity walls of the receiving cavity 21 on the lens mount assembly 2. Each elastic locking element 12 is correspondingly locked into one slot 22 to ensure locking strength and reliability, and to improve the uniformity of force distribution on the lens barrel assembly 1. See [link / reference] Figure 8 and Figure 11 Correspondingly, two curved grooves 312 are formed on the rotating disk 31 to create two cam portions 311. The guide protrusion 121 of each elastic locking member 12 is correspondingly locked in one curved groove 312 and slides in cooperation with the corresponding cam portion 311. When it is necessary to remove the lens barrel assembly 1 from the lens mount assembly 2 to replace the collimating lens 100, the two elastic locking members 12 can be disengaged from the corresponding slots 22 by rotating the rotating disk 31. The operation is convenient and quick, improving the speed of lens replacement.

[0067] See Figure 8 and Figure 9 A spring 124 is fitted onto the locking pin 123. The spring 124 is a compression spring. The spring 124 can provide a certain elastic force and support force to the locking pin 123, so that the cone 122 at the end of the locking pin 123 can automatically lock into the slot 22 under the elastic force of the spring 124, and ensure that the lens barrel assembly 1 will not have unnecessary displacement in the second direction (b direction) during use.

[0068] Further, see Figure 1 and Figure 12 A screwing part 32 is provided on the side of the rotating disk 31 facing away from the cam part 311. The rotating disk 31 can be rotated by the screwing part 32 to disengage the elastic snap-fit ​​12 from the slot 22, thereby allowing the lens barrel assembly 1 to be disassembled and assembled. In this embodiment, the screwing part 32 is a recessed hexagon countersunk hole. The rotating disk 31 can be rotated by inserting a matching wrench head into the hexagon countersunk hole.

[0069] Optionally, the lens barrel assembly 1 is also provided with a mounting hole communicating with the mounting cavity 17. The rotating disk 31 passes through the mounting hole and cooperates with the elastic snap-fit ​​member 12 through the cam part 311 on it. A cover 33 is provided at the opening of the mounting hole, which can seal the opening of the mounting hole to ensure the cleanliness of the inside of the lens barrel assembly 1.

[0070] See Figure 5 The cavity wall of the receiving cavity 21 is provided with a limiting pin 25. See also Figure 4The lens barrel assembly 1 is provided with a communicating pin hole 18 and a second enlarged channel 19, and the limiting pin 25 can enter the pin hole 18 along the second enlarged channel 19. By providing the second enlarged channel 19, the limiting pin 25 can be easily and quickly entered into the pin hole 18. The cooperation between the limiting pin 25 and the pin hole 18 can further prevent the lens barrel assembly 1 from shifting relative to the lens mount assembly 2, ensuring the stability of the collimating lens 100 during operation.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A collimating lens fixing fixture, characterized in that, include: The lens barrel assembly (1) has a collimating lens (100) fixed in its inner cavity. The lens barrel assembly (1) includes an arc positioning surface (11). The lens mount assembly (2) has a receiving cavity (21) with two opposing positioning cavity walls (211). The lens barrel assembly (1) can be inserted into the receiving cavity (21) along a first direction so that the arc positioning surface (11) is tangent to the two positioning cavity walls (211). One of the lens barrel assembly (1) and the lens mount assembly (2) is provided with an elastic snap-fit ​​member (12), and the other is provided with a slot (22). The elastic snap-fit ​​member (12) can be snapped into the slot (22) along the second direction under its own elastic force. The first direction and the second direction are perpendicular. One of the lens barrel assembly (1) and the lens mount assembly (2) is provided with a guide groove (13), and the other of the lens barrel assembly (1) and the lens mount assembly (2) is provided with a guide plunger (23). The guide plunger (23) can slide and engage with the guide groove (13) along the first direction. The two opposite walls of the receiving cavity (21) are provided with positioning grooves (24), and the two opposite sides of the lens tube assembly (1) are provided with positioning protrusions (15). The positioning protrusions (15) can press against the groove wall of the positioning groove (24) in a third direction, which is perpendicular to the first direction and the second direction. The guide groove (13) is connected to the limiting inclined groove (16), the limiting inclined groove (16) has a first push wall (161), the guide plunger (23) can enter the limiting inclined groove (16) along the guide groove (13) and abut against the first push wall (161) so that the positioning protrusion (15) presses against the groove wall of the positioning groove (24); The guide groove (13) is disposed on the lens barrel assembly (1), and the limiting inclined groove (16) is inclined toward the positioning protrusion (15); or, The guide groove (13) is disposed on the mirror mount assembly (2), and the limiting groove (16) is inclined in a direction away from the positioning protrusion (15).

2. The collimating lens fixing fixture according to claim 1, characterized in that, The guide groove (13) is connected to a first enlarged channel (14), the width of which gradually increases in the direction away from the guide groove (13), and the guide plunger (23) can enter the guide groove (13) along the first enlarged channel (14).

3. The collimating lens fixing fixture according to claim 1, characterized in that, The guide plunger (23) has a spherical head (231) at one end facing the bottom wall of the guide groove (13).

4. The collimating lens fixing fixture according to claim 1, characterized in that, It also includes a disassembly and assembly component (3), wherein the lens barrel assembly (1) has an installation cavity (17) along the second direction, and the elastic snap-fit ​​component (12) is movably inserted into the installation cavity (17). The disassembly and assembly component (3) includes a cam portion (311), and one end of the elastic snap-fit ​​component (12) away from the slot (22) is slidably in contact with the cam portion (311). By rotating the cam portion (311), the elastic snap-fit ​​component (12) is disengaged from the slot (22).

5. The collimating lens fixing fixture according to claim 4, characterized in that, The assembly / disassembly assembly (3) also includes a rotating disk (31), on which a curved groove (312) is provided to form the cam portion (311). The elastic snap-fit ​​member (12) has a guide protrusion (121) at one end away from the snap-fit ​​groove (22). The guide protrusion (121) is inserted into the curved groove (312) and slides in cooperation with the cam portion (311).

6. The collimating lens fixing fixture according to claim 1, characterized in that, The elastic snap-fit ​​member (12) includes a truncated cone (122), and the slot (22) has a second push wall (221) that can abut against the inclined surface of the truncated cone (122) so that the arc positioning surface (11) is pressed against the positioning cavity wall (211).

7. The collimating lens fixing fixture according to claim 1, characterized in that, The cavity wall of the receiving cavity (21) is provided with a limiting pin (25), and the lens tube assembly (1) is provided with a connecting pin hole (18) and a second enlarged channel (19). The limiting pin (25) can enter the pin hole (18) along the second enlarged channel (19).

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