Adjustable optical lens bracket

Abstract

The utility model relates to the field of laser equipment parts, in particular to an adjustable optical mirror bracket. An adjustable optical mirror bracket comprises a mirror frame and a mounting base which are arranged at an interval, an adjusting screw is assembled on one of the mirror frame and the mounting base in a threaded mode, the other one of the mirror frame and the mounting base abuts against and makes contact with the end of the adjusting screw, a screw penetrating hole is formed in one of the mirror frame and the mounting base, and a first threaded hole is formed in the other one of the mirror frame and the mounting base. The adjustable optical mirror bracket further comprises a limiting screw which penetrates through the screw penetrating hole and is connected with the first threaded hole in a matched mode. The limiting screw provides a pulling force between the mounting base and the mirror frame, and the adjusting screw provides a pushing force between the mounting base and the mirror frame, so that the mounting base and the mirror frame are connected together; the problem that in the prior art, a tension spring is used for keeping the connection between the mirror frame and the mounting base in an optical mirror bracket, so that the direction of light rays is changed when external vibration occurs in a test is solved.

Description

Technical Field

[0001] The utility model relates to the field of laser equipment parts and components, in particular to an adjustable optical mirror frame. Background Art

[0002] Optical devices need to refract or reflect light to form a complete optical path. In the process of refraction and reflection, lenses and frames for mounting lenses are required. Usually, the frame includes a mounting base for fixed connection to the device body and a frame for mounting lenses. The position and angle of the frame relative to the mounting base are adjustable, so that the lenses can be adjusted relative to the device body.

[0003] The publication specification of the Chinese invention patent application with the publication date of July 1, 2009 and the publication number of CN 101470236 A discloses an optical adjustment mirror frame suitable for mobile processing of all-solid-state high-power lasers. The mirror frame includes a bracket (i.e., a mounting base) and a mirror frame arranged at intervals. In order to adjust the angle, three mounting holes are arranged on the mounting base, and each mounting hole is equipped with a fine adjustment thread pair (i.e., an adjustment screw). A ball is arranged at the front end of the adjustment screw, and the ball and the mirror frame push and cooperate. In order to achieve an adjustable connection between the mounting base and the mirror frame, a tension spring is arranged between the mounting base and the mirror frame, that is, the connection between the mirror frame and the mounting base is completed under the pushing action of the adjustment screw and the pulling action of the tension spring.

[0004] In the above technical solution, the position between the mounting base and the lens frame is maintained by the push of the adjusting screw and the pulling of the tension spring. During the adjustment of the adjusting screw, the tension of the tension spring needs to be overcome. Therefore, the tension of the tension spring is usually not set too large to avoid difficulty in adjustment. However, when the optical device is tested, the stability of the device itself is required to be high. If vibration occurs during the test, the spring itself has the possibility of continuing to expand, so only one-sided limit can be generated on the lens frame. If the spring is stretched, the lens frame may be displaced, thereby changing the direction of the laser. Utility Model Content

[0005] The utility model aims to provide an adjustable optical frame, which is used to solve the problem in the prior art that the optical frame uses a tension spring to maintain the connection between the frame and the mounting base, which causes the direction of the light to be changed when external vibration occurs during testing.

[0006] In order to achieve the above-mentioned purpose, the adjustable optical frame in the utility model adopts the following technical solutions:

[0007] An adjustable optical frame comprises a frame and a mounting base arranged at intervals, one of the frame and the mounting base being threadedly assembled with an adjusting screw, and the other being in abutment with the end of the adjusting screw, one of the frame and the mounting base being provided with a screw through-hole, and the other being provided with a first threaded hole, the adjustable optical frame further comprising a limit screw passing through the screw through-hole and being connected to the first threaded hole, the limit screw having a screw head for press-fitting with the frame or the mounting base provided with the screw through-hole, or the limit screw being sleeved with a pressing piece for press-fitting with the frame or the mounting base provided with the screw through-hole under pressure of the screw head of the limit screw.

[0008] Furthermore, a limiting portion is arranged in the screw through hole, and a compressible elastic member is also arranged in the screw through hole, which is pressed between the screw head and the limiting portion or between the pressing member and the limiting portion to make the mounting base and the frame have a tendency to move towards each other.

[0009] Furthermore, the screw through hole includes a large-diameter hole and a small-diameter hole, the large-diameter hole is used to accommodate the compression elastic member, and the step surface between the large-diameter hole and the small-diameter hole constitutes the limiting portion.

[0010] Further, when a pressing piece is sleeved on the limit screw, the pressing piece is a gasket sleeved on the screw rod of the limit screw.

[0011] Furthermore, three adjusting screws are provided, and the three adjusting screws form a right triangle on the projection of the mounting base. At least two limiting screws are provided, and the plurality of limiting screws are respectively located on the right angle sides of the right triangle.

[0012] Furthermore, the compression elastic member is a compression spring.

[0013] Furthermore, a hexagonal screw hole is provided on the screw head of the limit screw for easy screwing.

[0014] Furthermore, a spherical abutment portion is provided at the end of the adjusting screw, and a spherical surface for accommodating the abutment portion is provided on one of the lens frame and the mounting base for abutting against the adjusting screw.

[0015] Furthermore, one of the lens frame and the mounting base for threadedly assembling the adjusting screw is provided with a second threaded hole threadedly assembled with the adjusting screw, and the pitch of the second threaded hole is smaller than the pitch of the first threaded hole.

[0016] Furthermore, the screw head of the limit screw and the screw head of the adjusting screw are located on the same side of the mirror frame and the mounting base.

[0017] The beneficial effects of the adjustable optical frame of the utility model are as follows: the utility model improves the adjustable optical frame in the prior art, and facilitates the installation of the adjustable optical frame on the equipment by providing a mounting base and a frame arranged at intervals; facilitates the adjustment of the position and angle between the mounting base and the frame by providing an adjusting screw, thereby achieving the adjustment between the lens and the equipment; the limiting screw can be installed on one of the mounting base and the frame and fixed relatively to the one by providing a first threaded hole and a screw through hole, and in addition, a screw through hole is provided on the other part, and when the limiting screw is screwed When tightened, the screw head of the limit screw will directly or indirectly press the other part through the top pressure piece, that is to say, the limit screw provides a pulling force between the mounting base and the frame, and the adjusting screw provides a thrust between the mounting base and the frame, thereby connecting the mounting base and the frame together; since the pulling force between the mounting base and the frame is provided by the limit screw, the vibration of the spring caused by the vibration of the external environment during use is avoided, thereby solving the problem in the prior art that the tension spring is used to maintain the connection between the frame and the mounting base in the optical frame, which causes the direction of the light to change when external vibration occurs during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the adjustable optical frame in the utility model;

[0019] Figure 2 A cross-sectional view of an embodiment of the adjustable optical frame of the utility model;

[0020] Figure 3 It is a cross-sectional view of another embodiment of the adjustable optical frame in the utility model.

[0021] In the figure: 1. mounting base; 11. small diameter hole; 12. large diameter hole; 2. frame; 21. lens; 22. first threaded hole; 23. accommodating spherical surface; 24. lens mounting hole; 3. limit screw; 31. gasket; 32. screw; 33. screw head; 4. adjusting screw; 41. abutment portion; 5. counter spring. DETAILED DESCRIPTION

[0022] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0023] In this embodiment, by using a limit screw between the mounting base and the frame to generate a pulling force, the problem of the lens being easily vibrated due to vibration of the external environment during use, which causes the light direction to change, is avoided.

[0024] In the embodiment 1 of the adjustable optical frame (hereinafter referred to as the frame) of the present utility model:

[0025] like Figure 1 and Figure 2 As shown, in this embodiment, the frame includes a mounting base 1 and a frame 2 arranged at intervals. The frame 2 is provided with a lens mounting hole 24 for mounting a lens 21, and the lens 21 is fixedly mounted in the lens mounting hole 24. The mounting base 1 is provided with a avoidance hole arranged corresponding to the lens mounting hole 24 to avoid blocking the light. In order to adjust the lens 21 relative to the device to adjust the optical path, the frame 2 can be moved relative to the base. Specifically, an adjustment screw 4 is threadedly assembled on the mounting base 1, and the end of the adjustment screw 4 abuts against the frame 2. The adjustment screw 4 provides a thrust between the mounting base 1 and the frame 2.

[0026] Specifically, the adjusting screw 4 includes a threaded section for installation on the mounting base 1, and a screwing section and an abutting portion 41 for abutting on the lens frame 2 are respectively provided at both ends of the threaded section. The abutting portion 41 is a spherical structure provided at the end of the adjusting screw 4. Accordingly, a spherical surface 23 for accommodating the abutting portion 41 is provided on the lens frame 2. The spherical surface 23 is a spherical surface with a radius larger than the spherical structure, thereby better accommodating the abutting portion 41. When the angle between the mounting base 1 and the lens frame 2 is different, the contact position can also be automatically found through the contact between the spherical structure and the spherical surface. In order to realize the installation of the adjusting screw 4, a second threaded hole for threadedly matching with the threaded section of the adjusting screw 4 is also provided on the mounting base 1. A screwing section is provided at one end of the adjusting screw 4 away from the abutting portion 41 to facilitate adjustment of the spacing between the mounting base 1 and the lens frame 2. Specifically, an inner hexagonal hole is provided on the screwing section, and screwing holes arranged along the radial direction of the screwing section and penetrating the inner hexagonal hole are also provided on the screwing section, so that the adjusting screw 4 can be screwed and adjusted conveniently through the screwing holes. Of course, in other embodiments, the installation method of the adjusting screw 4 can also be adjusted, specifically, a second threaded hole is provided on the lens frame 2, and the adjusting screw 4 is installed on the lens frame 2 through the second threaded hole, and a spherical surface for abutting and contacting with the abutting portion 41 is provided on the mounting base 1.

[0027] The setting of the adjusting screw 4 can only generate thrust between the mounting base 1 and the lens frame 2. In order to generate tension between the mounting base 1 and the lens frame 2, the lens frame also includes a limit screw 3 mounted on one of the lens frame 2 or the mounting base 1. In this embodiment, a first threaded hole 22 is provided on the lens frame 2, and a screw through hole for the screw rod 32 of the limit screw 3 to pass through is provided on the mounting base 1. When in use, the limit screw 3 can be pressed on the end face of the mounting base 1 away from the lens frame 2 through the screw head 33. In order to increase the diameter that the screw head 33 can be pressed and expand the contact area, a gasket 31 is also sleeved on the limit screw 3. The gasket 31 is used to abut against the screw head 33 and the mounting base 1 respectively. At this time, the limit screw 3 is indirectly pressed on the mounting base 1. In order to facilitate the application of force to the limit screw 3, a hexagonal screw hole is provided on the screw head 33 of the limit screw 3 for easy screwing. Since the adjustment screw 4 requires a high adjustment accuracy, and the limit screw 3 only needs to provide a pulling force to tighten the mounting base 1 and the lens frame 2, the pitch of the second threaded hole is smaller than the pitch of the first threaded hole 22, so that the limit screw 3 can prevent loosening to adjust the adjustment screw 4. Of course, in other embodiments, the limit screw 3 can also be directly pressed on the end face of the mounting base 1 away from the lens frame 2, that is, the gasket 31 is no longer provided at this time. Alternatively, in other embodiments, the screw head 33 can also be set as an outer hexagonal hexagonal prism. Alternatively, in other embodiments, the pitch of the second threaded hole can also be greater than or equal to the pitch of the first threaded hole.

[0028] In order to better adjust the angle and position of the lens frame 2, three adjusting screws 4 are provided, and the three adjusting screws 4 are arranged at intervals around the lens mounting hole 24, and the projections of the three adjusting screws 4 on the mounting base 1 form a right triangle. At this time, any adjustment of one will cause the angle of the lens frame 2 to change. When the three adjusting screws 4 are adjusted at the same time, and the displacement of the three adjusting screws 4 is the same, the position of the lens frame 2 relative to the mounting base 1 will be translated. In order to tighten the mounting base 1 and the lens frame 2, two limit screws 3 are provided, and the two limit screws 3 are respectively arranged between the two adjustment screws 4 that constitute the right angles of the right triangle. Alternatively, in other embodiments, the adjustment screws 4 can also be set to four, and the four adjustment screws 4 form a square. Alternatively, in other embodiments, the limit screws 3 can also be set to four or six. Of course, in other embodiments, the limit screw 3 can also be located within the triangular area surrounded by the three adjusting screws 4. At this time, the limit screw 3 can also be set to one. It should be noted that in order to better apply force, the limit screw 3 needs to be set at a position close to the center of the triangular area.

[0029] During the adjustment process, the limit screw 3 needs to be loosened first, and then the adjustment screw 4 can be adjusted. During the loosening of the limit screw 3, no tension is generated between the mounting base 1 and the lens frame 2. At this time, the abutment portion 41 of the adjustment screw 4 may be out of contact with the accommodating spherical surface 23 of the lens frame 2, and the abutment position after the installation is completed cannot be guaranteed. In order to facilitate the real-time understanding of the position of the limit screw 3 after the installation is completed during the screwing process, the frame also includes an elastic member arranged between the limit screw 3 and the mounting base 1 for generating a thrust force on the mounting base 1 toward the lens frame 2. Specifically, the screw perforation includes a large diameter hole 12 and a small diameter hole 11, the large diameter hole 12 is used to accommodate the elastic member, and the small diameter hole 11 is used to be arranged toward one side of the lens frame 2. The step surface between the large diameter hole 12 and the small diameter hole 11 constitutes a limiting portion for limiting the elastic member, and the two ends of the elastic member are respectively abutted between the limiting portion and the gasket 31. The elastic member is a top spring 5, which is in a pre-compressed state, and can generate tension between the mounting base 1 and the frame 2 during the process of loosening the screw. Of course, in other embodiments, the elastic member may no longer be provided, and when adjustment is required, quantitative adjustment is performed according to the number of adjustment turns. Alternatively, in other embodiments, the elastic member may also be provided as a coil spring or a compressible rubber. Alternatively, the elastic member may also be provided as a tension spring connected between the mounting base and the frame. Alternatively, in other embodiments, the screw hole may also be a through hole, and finally a limiting bump is additionally provided in the screw hole.

[0030] When adjustment is required, first loosen the limit screw 3. At this time, the adjustment screw 4 is no longer compressed and there is adjustment space. Then, the adjustment screw 4 is screwed. The relative relationship between the three adjustment screws 4 changes the position of the adjustment screw 4 relative to the mounting base 1. Under the action of the elastic member, the abutment portion 41 and the accommodating spherical surface 23 are in close contact, which is convenient for displaying the final state of the lens 21 at all times. Finally, tighten the limit screw 3. At this time, the limit screw 3 will drive the gasket 31 to compress the elastic member, so that the elastic member is completely accommodated in the screw perforation. The gasket 31 is in close contact with the end face of the mounting base 1. At this time, there is no elastic force between the mounting base 1 and the frame 2. The mounting base 1 and the frame 2 are connected by the pulling force of the limit screw 3 and the pushing force between the adjustment screws 4.

[0031] In Embodiment 2 of the adjustable optical frame (hereinafter referred to as the frame) of the present utility model:

[0032] This embodiment is improved on the basis of embodiment 1. Specifically, Figure 3As shown, in this embodiment, a screw through hole is provided on the lens frame 2, and a first threaded hole 22 is provided on the mounting base 1, and at this time, the screw rod 32 of the limit screw 3 is installed on the mounting base 1. Correspondingly, the form of the screw through hole is the same as the structure of the screw through hole in embodiment 1, and the other structures are the same as those in embodiment 1, which will not be repeated here.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable optical frame, comprising a frame and a mounting base arranged at intervals, one of the frame and the mounting base being threadedly assembled with an adjusting screw, and the other being in abutment with an end of the adjusting screw, characterized in that: A screw through hole is provided on one of the frame and the mounting base, and a first threaded hole is provided on the other. The adjustable optical frame also includes a limit screw that passes through the screw through hole and is connected to the first threaded hole. The limit screw has a screw head for press-fitting with the frame or mounting base provided with the screw through hole, or the limit screw is sleeved with a pressing piece for press-fitting with the frame or mounting base provided with the screw through hole when the screw head of the limit screw is pressed.

2. The adjustable optical frame according to claim 1, characterized in that: A limiting portion is arranged in the screw through hole, and a compression elastic member is also arranged in the screw through hole, which is pressed between the screw head and the limiting portion or between the pressing member and the limiting portion to make the mounting base and the mirror frame have a tendency to move toward each other.

3. The adjustable optical frame according to claim 2, characterized in that: The screw through hole comprises a large-diameter hole and a small-diameter hole, the large-diameter hole is used to accommodate the compression elastic member, and the step surface between the large-diameter hole and the small-diameter hole constitutes the limiting portion.

4. The adjustable optical frame according to any one of claims 1 to 3, characterized in that: When a pressing piece is sleeved on the limit screw, the pressing piece is a gasket sleeved on the screw rod of the limit screw.

5. The adjustable optical frame according to any one of claims 1 to 3, characterized in that: There are three adjusting screws, which form a right triangle on the projection of the mounting base. There are at least two limiting screws, which are respectively located on the right angle sides of the right triangle.

6. The adjustable optical frame according to claim 2 or 3, characterized in that: The compression elastic member is a compression spring.

7. The adjustable optical frame according to any one of claims 1 to 3, characterized in that: The screw head of the limit screw is provided with a hexagonal screw hole for easy screwing.

8. The adjustable optical frame according to any one of claims 1 to 3, characterized in that: The end of the adjusting screw is provided with a spherical abutting portion, and one of the lens frame and the mounting base used for abutting contact with the adjusting screw is provided with a spherical surface for accommodating the abutting portion.

9. The adjustable optical frame according to claim 8, characterized in that: A second threaded hole for threading the adjusting screw is arranged on one of the lens frame and the mounting base. The second threaded hole has a smaller thread pitch than the first threaded hole.

10. The adjustable optical frame according to any one of claims 1 to 3, characterized in that: The screw heads of the limit screws are located on the same side of the frame and mounting base as the screw heads of the adjustment screws.

Images