A stress-free pad structure

Abstract

The utility model discloses a stress-free pad structure, which belongs to the technical field of optical device adjustment. The utility model solves the problem that after the conventional pad is used to complete the angle adjustment between the optical device and the mounting platform, there are oblique angle gaps between the optical device fixing seat and the pad and the mounting platform respectively. The utility model includes a first block, a spherical groove and a through hole; the first block includes a symmetrically arranged raised end and a first plane end; the raised end includes a spherical protrusion, and the through hole passes through the first plane end, the spherical protrusion and the spherical groove. The utility model compensates for the oblique angle gap between the optical device fixing seat and the mounting platform by means of a stress-free pad structure that is arranged between the optical device fixing seat and the mounting platform and is tightly attached, the spherical protrusion slides on the inner wall of the spherical groove, and the first plane end extends out of the spherical groove, which not only simplifies the adjustment process, but also achieves stress-free adjustment, thereby improving the stability of the optical performance of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of optical device adjustment, in particular to a stress-free cushion block structure. Background Art

[0002] When assembling the optical device, the distance between the optical device fixing seat and the base plate reference plane is adjusted, and then the angle between the optical axis of the optical device and the base plate is adjusted to obtain the optical technical requirements that meet the design.

[0003] At present, conventional gaskets are used in the prior art to complete the angle adjustment between the optical device fixing seat and the base plate reference surface. Figure 1 For example, X1 represents the light output device holder, X2 represents the bottom plate, X4 represents the horizontal axis of the optical device holder before adjustment, X5 represents the horizontal axis of the light source holder after adjustment, and X6 represents the horizontal axis of the bottom plate. Line X4 is parallel to line X6, and there is an angle between line X5 and line X6. Figure 1 No gasket is provided at the middle left connection end (see Figure 2 ), by adding a conventional gasket X3 (see Figure 3 ) After the optical axis angle adjustment, there are bevel gaps between the left end of the optical device fixing part and the optical device mounting table, and between the right end and the optical device mounting table, see Figure 2 and Figure 3 The optical device fixing seat is fastened to the mounting platform by screws, which causes stress deformation of the optical device fixing seat, causing changes in the internal optical path of the optical device, so that the optical indicators of the optical device after installation are always in an unstable state. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a stress-free gasket structure to solve the problem that after the conventional gasket is used to complete the angle adjustment between the optical axis of the optical device and the mounting table, there is an oblique angle gap between the optical device fixing seat and the conventional gasket and the mounting table respectively, and after tightening, the optical device fixing seat has stress deformation, causing the internal optical path of the optical device to change, resulting in unstable optical indicators of the optical device after installation and adjustment.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] The utility model provides a stress-free pad structure, which is arranged between an optical device fixing seat and a mounting platform and is used to adjust the angle between the optical device fixing seat and the mounting platform, and comprises a first block, a spherical groove and a through hole;

[0007] The first block includes a convex end and a first plane end that are oppositely disposed; the convex end includes a spherical protrusion;

[0008] The spherical groove is arranged on the optical device fixing seat;

[0009] The spherical protrusion slides on the inner wall of the spherical groove, and the first plane end extends out of the spherical groove and is parallel to and closely attached to the mounting platform, thereby compensating for the oblique angle gap between the optical device fixing seat and the mounting platform;

[0010] The through hole passes through the first plane end, the spherical protrusion and the spherical groove.

[0011] Further, a second block is included;

[0012] The second block is provided with a spherical groove;

[0013] The second block includes a second plane end, and the second plane end is arranged opposite to the spherical groove.

[0014] Furthermore, the second plane end is parallel to and in close contact with the optical device fixing seat.

[0015] Further, the through hole passes through the second planar end.

[0016] Furthermore, a gasket is included.

[0017] Further, the gasket is arranged between the second plane end and the optical device fixing seat;

[0018] And / or a gasket is disposed between the first planar end and the mounting platform.

[0019] Further, the diameter of the through hole is larger than the diameter of the fastener;

[0020] The fastener passes through the through hole.

[0021] Furthermore, the contact area ratio between the spherical protrusion and the spherical groove is greater than or equal to 90%.

[0022] Further, the planar shape of the first planar end includes a first circle;

[0023] The planar shape of the planar end of the second segment includes a square or a second circle.

[0024] Further, the diameter of the first circle is set to be L, and the aperture of the through hole is set to be φ;

[0025] 2.5×φ≤L≤3.5×φ;

[0026] φ≥φ0+0.5mm, φ0 represents the diameter of the fastener that penetrates the through hole;

[0027] The units of L, φ and φ0 are all mm;

[0028] Set the radius of the spherical protrusion to SR;

[0029]

[0030] The unit of SR is mm;

[0031] The side length of the square is L or the diameter of the second circle is L.

[0032] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0033] 1. The stress-free pad structure of the utility model is arranged between the optical device fixing seat and the mounting platform. Through the sliding cooperation between the spherical protrusion and the spherical groove, during the angle adjustment process and fixation of the optical device fixing seat and the mounting platform, the stress-free pad structure is tightly attached to the two components respectively, and no oblique angle gap will appear. There will be no stress during the fixed connection due to the oblique angle gap, and the optical indicators of the optical device will not be caused to change. The stress-free pad structure of the utility model makes the optical indicator performance of the optical device stable after installation and adjustment.

[0034] 2. In the utility model, the spherical protrusion rotates around the through hole on the inner wall of the spherical groove to meet various angles and directions. There is no need to consider the angle and direction of the gasket, and the installation and adjustment process is simple.

[0035] 3. In the utility model, after the fastener penetrates the through hole, the optical device fixing seat and the stress-free pad structure are connected to the installation platform. During the angle adjustment process, the spherical protrusion slides on the inner wall of the spherical groove, so that the stress-free pad structure and the optical element fixing seat, and the stress-free pad structure and the installation platform are always kept in close contact, and no oblique angle gap will appear, making the adjustment process more stable. When fixed, no stress caused by the oblique angle gap will appear between the stress-free pad structure and the optical device fixing seat, and between the stress-free pad structure and the installation platform, thereby achieving stress-free installation and adjustment, ensuring that the technical indicators of the optical device do not change after fixation, and making the optical indicators of the optical device more stable.

[0036] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0038] Figure 1It is a schematic diagram of the structure after the angle adjustment between the optical device fixing seat and the reference surface of the mounting platform is completed by using a conventional gasket in the prior art;

[0039] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0040] Figure 3 for Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0041] Figure 4 It is a structural schematic diagram of a stress-free pad structure in the utility model;

[0042] Figure 5 for Figure 4 A schematic diagram of the longitudinal section structure after the first block and the second block are combined;

[0043] Figure 6 for Figure 5 A schematic diagram of the longitudinal section structure of the first sub-block;

[0044] Figure 7 for Figure 5 A schematic diagram of the longitudinal section structure of the second sub-block;

[0045] Figure 8 It is a schematic structural diagram of the stress-free pad structure of the utility model after being connected with the optical device fixing seat and the mounting platform when the spherical groove is arranged on the second block;

[0046] Fig. 9 It is a schematic structural diagram of the stress-free pad structure of the utility model after being connected with the optical device fixing seat and the mounting platform when the spherical groove is arranged on the optical device fixing seat.

[0047] Reference numerals:

[0048] X1-light output device fixing seat, X2-bottom plate, X3-conventional gasket, X4-axis of the optical device fixing seat along the horizontal direction before adjustment, X5-axis of the optical device fixing seat along the horizontal direction after adjustment, X6-axis of the mounting platform along the horizontal direction, X7-angle gap;

[0049] 1-optical device fixing seat, 2-mounting platform, 3-stress-free pad structure, 4-fastener;

[0050] 10-first block, 20-spherical groove, 30-through hole, 40-second block, 50-gasket;

[0051] 11-convex end, 12-first plane end;

[0052] 41-Second flat end. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0054] Example

[0055] A specific embodiment of the utility model discloses a stress-free pad structure 3, such as Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, between the optical device fixing seat 1 and the mounting platform 2, it is used to adjust the angle between the optical device fixing seat 1 and the mounting platform 2, including a first block 10, a spherical groove 20 and a through hole 30; the first block 10 includes a raised end 11 and a first plane end 12 arranged opposite to each other; the raised end 11 includes a spherical protrusion; the spherical groove 20 is arranged on the optical element fixing seat 1; the spherical protrusion slides on the inner wall of the spherical groove 20, and the first plane end 12 extends out of the spherical groove 20 and is parallel to and tightly attached to the mounting platform 2, thereby compensating for the oblique angle gap between the optical device fixing seat 1 and the mounting platform 2; the through hole 30 passes through the first plane end 12, the spherical protrusion and the spherical groove 20.

[0056] In this embodiment, the stress-free pad structure 3 is arranged between the optical device fixing seat 1 and the mounting platform 2. The fastener 4 passes through the through holes 30 on the optical device fixing seat 1 and the stress-free pad structure 3 in turn, and is pre-connected with the mounting platform 2. Then, the spherical protrusion and the spherical groove 20 are rotated and slidably matched to complete the angle adjustment between the optical axis of the optical device on the optical device fixing seat 1 and the mounting plane of the mounting platform 2. Finally, the optical device fixing seat 1 and the stress-free pad structure 3 are fixed to the mounting platform 2 through the fastener 4. During the angle adjustment process and the fixing process after the angle adjustment is completed, the stress-free pad structure 3 is tightly attached to the optical device fixing seat 1, the stress-free pad structure 3 is tightly attached to the mounting platform 2, the spherical protrusion slides on the inner wall of the spherical groove 20, and the first plane end 12 extends out of the spherical groove 20, so that no oblique angle gap will appear between the stress-free pad structure 3 and the optical device fixing seat 1 and the mounting platform 2 respectively, and no stress will be caused during the fixed connection due to the oblique angle gap, and the optical indicators of the optical device will not be caused to change. The stress-free pad structure of the utility model makes the optical performance of the optical device more stable after installation.

[0057] In this embodiment, the spherical protrusion rotates around the through hole on the inner wall of the spherical groove to meet various angles and directions. There is no need to consider the angle and direction of the gasket, and the installation and adjustment process is simple.

[0058] In this embodiment, the fastener 4 passes through the through hole 30 to connect the optical device fixing seat 1 and the stress-free pad structure 3 to the mounting platform 2. During the angle adjustment process, the spherical protrusion slides on the inner wall of the spherical groove 20, so that the stress-free pad structure 3 and the two components always remain in close contact, and no oblique angle gap will appear. When fixed, the optical device fixing seat 1 and the mounting platform 2 will not have stress caused by the oblique angle gap, thereby achieving stress-free installation and adjustment, ensuring that the technical indicators of the optical device do not change after fixation, and making the optical performance of the optical device more stable.

[0059] In this embodiment, the flatness of the first planar end 12 is below 0.01 mm, so that during the optical axis angle adjustment process, the first planar end 12 is parallel to the mounting platform 2 and tightly attached without gaps, so that after adjustment and fixation, the optical axis angle in the optical device does not shift, and the optical performance of the optical device is more stable.

[0060] Although the prior art uses angled gaskets to compensate for the bevel gap, the angle between the optical axis of the optical device and the reference plane of the optical device mounting platform is small, and the angled gasket is too thin, which makes it difficult to distinguish and is not conducive to installation and adjustment. In this embodiment, the spherical protrusion slides on the inner wall of the spherical groove 20, and the first plane end 12 extends out of the spherical groove 20 and is parallel to and closely attached to the mounting platform 2, ensuring that no bevel gap will appear during the adjustment and fixing process.

[0061] Furthermore, by grinding the first plane end 12, the height of the first block 10 can be controlled, thereby achieving angle adjustment between the optical device holder 1 and the mounting platform 2. Exemplarily, the spherical groove 20 is provided on the bottom surface of the optical device holder 1, and the first block 10 is arranged between the optical device holder 1 and the mounting platform 2. This arrangement achieves the goal of setting the height of the first block 10 to meet the spacing between the optical device holder 1 and the mounting platform 2 under the condition of limited installation and adjustment space. At the same time, by adjusting the cooperation between the spherical protrusion and the spherical groove 20, the angle adjustment is completed under the condition of ensuring that there is no oblique angle gap between the first block 10 and the optical device holder 1 and the mounting platform 2 respectively, and stress can be avoided when the optical device holder 1 and the mounting platform 2 are fastened.

[0062] Furthermore, in the case where there is sufficient adjustment space between the optical device fixing seat 1 and the mounting platform 2, the stress-free pad structure 3 of this embodiment further includes a second sub-block 40, such as Figure 5 and Figure 7 As shown; the spherical groove 20 is arranged on the second block 40, and the second block 40 includes a second planar end 41 arranged opposite to the spherical groove 20; the through hole 30 passes through the second planar end 41 and the spherical groove 20.

[0063] In this embodiment, the spherical protrusion can slide along the inner wall of the spherical groove 20, the first plane end 12 is parallel to and close to the mounting platform 2, and the second plane end 41 is parallel to and close to the optical device fixing seat 1. The stress-free pad structure is used to achieve angle adjustment without an angled gap between the optical device fixing seat 1 and the mounting platform 2. Compared with the existing angled gaskets, it does not involve any differentiation or selection of angle gaskets, and is simple to assemble.

[0064] In this embodiment, the flatness of the second planar end 41 is below 0.01 mm, so that during the optical axis angle adjustment process, the second planar end 41 is parallel to the optical device fixing seat 1 and is tightly attached without gaps, so that after adjustment and fixation, the optical axis angle of the optical device does not shift, and the optical performance of the optical device is more stable.

[0065] In this embodiment, when the first block 10 and the second block 40 are in an axial alignment state relative to the central axis of the through hole 30, the parallelism between the first planar end 12 and the second planar end 41 is less than 0.01 mm, thereby improving the angle accuracy between the optical device fixing seat 1 and the mounting platform 2 during the angle adjustment process, thereby ensuring the angle between the optical axis of the optical device and the reference plane of the mounting platform.

[0066] In this embodiment, the height of the second block 40 is adjusted by grinding the second planar end 41, so that the height of the stress-free pad structure 3 is consistent with the distance between the optical device fixing seat 1 and the mounting platform 2; it should be noted that when grinding the second planar end 41, the first planar end 12 can also be ground; or a conventional gasket can be added to the stress-free pad at the other end corresponding thereto.

[0067] Furthermore, two stress-free pad structures 3 are provided at a fixed connection end between the optical device fixing seat 1 and the mounting platform 2. Specifically, the two stress-free pad structures are symmetrically provided on both sides of the optical device fixing seat 1. Figure 8 As shown. Exemplarily, the two stress-free pad structures include a pad structure a and a pad structure b, and the pad structure a and the pad structure b are symmetrically arranged on both sides of the optical device fixing seat 1, as shown in FIG. Figure 8 As shown, specifically, a fastener 4 such as a bolt sequentially penetrates the pad structure b, the optical element fixing seat 1, and the pad structure a and is fixedly connected to the mounting platform 2, thereby realizing the fixed connection between the optical device fixing seat 1 and the mounting platform 2. The function of the pad structure b is that when adjusting a larger angle, the end face of the screw is no longer parallel to the optical device fixing seat, and stress is also generated during tightening, and is selected according to the optical index requirements and the influence size.

[0068] In this embodiment, two stress-free pad structures 3 are arranged at the connecting ends of the optical device fixing seat 1 and the mounting platform 2, so that no oblique angle gaps will appear between the fastener 4 and the optical device fixing seat 1, between the optical device fixing seat 1 and the stress-free pad structure 3, and between the stress-free pad structure 3 and the mounting platform 2, thereby avoiding stress during the connection process.

[0069] Furthermore, the stress-free pad structure 3 further includes a gasket 50, such as Figure 8 As shown, the gasket 50 is arranged between the second plane end 41 and the optical device holder 1, and the through hole 30 passes through the gasket 50, so that the height of the stress-free pad structure 3 conforms to the spacing between the optical device holder 1 and the mounting platform 2. In this embodiment, the first surface of the gasket 50 is parallel to and closely attached to the second plane end 41, and the second surface of the gasket 50 is parallel to and closely attached to the optical device holder 1, wherein the first surface of the gasket 50 and the second surface of the gasket 50 are symmetrically arranged.

[0070] Further, the gasket 50 is arranged between the first plane end 12 and the mounting platform 2, and the through hole 30 passes through the gasket 50, so that the height of the stress-free pad structure 3 matches the spacing between the optical device fixing seat 1 and the mounting platform 2. In this embodiment, the first surface of the gasket 50 is parallel to and in close contact with the first plane end 12, and the second surface of the gasket 50 is parallel to and in close contact with the mounting platform 2, wherein the first surface of the gasket 50 and the second surface of the gasket 50 are symmetrically arranged.

[0071] Furthermore, considering the smooth sliding of the spherical protrusion and the spherical groove 20, the diameter of the through hole 30 is larger than the diameter of the fastener 4; the fastener 4 passes through the through hole 30 to achieve the fastening connection between the optical device fixing seat 1, the stress-free pad structure 3 and the mounting platform 2, such as Figure 8 and Fig. 9 shown.

[0072] Furthermore, considering the smoothness of the fit between the spherical protrusion and the spherical groove 20, the contact area ratio between the spherical protrusion and the spherical groove 20 is greater than or equal to 90%. Specifically, the contact area ratio between the outer spherical surface of the spherical protrusion and the inner wall of the spherical groove 20 is greater than or equal to 90%.

[0073] Furthermore, considering the smoothness of the fit between the spherical protrusion and the spherical groove 20 , the roughness of the outer surface of the spherical protrusion and the inner wall of the spherical groove 20 are both greater than or equal to 1.0 micrometer and less than or equal to 1.6 micrometer.

[0074] Furthermore, the planar shape of the first planar end 12 includes a first circle, so that the force applied to the first planar end 12 when in contact with the optical device holder 1 or the mounting platform 2 is more uniform.

[0075] In this embodiment, the diameter of the first circle is set to L, and the aperture of the through hole 30 is set to φ;

[0076] 2.5×φ≤L≤3.5×φ;

[0077] φ≥φ0+0.5;

[0078] φ0 represents the diameter of the fastener; the units of L, φ and φ0 are all mm.

[0079] In this embodiment, the spherical radius of the spherical protrusion is set to SR, in mm;

[0080]

[0081] Further, the planar shape of the second planar end 41 includes a square, and the side length of the square is equal to the diameter of the first circle; the planar shape of the second planar end 41 includes a second circle with a diameter of L.

[0082] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A stress-free pad structure, arranged between an optical device fixing seat (1) and a mounting platform (2), for adjusting the angle between the optical device fixing seat (1) and the mounting platform (2), characterized in that: It comprises a first block (10), a spherical groove (20) and a through hole (30); The first block (10) comprises a protruding end (11) and a first plane end (12) which are arranged opposite to each other; the protruding end (11) comprises a spherical protrusion; The spherical groove (20) is arranged on the optical device fixing seat (1); The spherical protrusion slides on the inner wall of the spherical groove (20), and the first plane end (12) extends out of the spherical groove (20) and is parallel to and closely attached to the mounting platform (2), thereby compensating for the oblique angle gap between the optical device fixing seat (1) and the mounting platform (2); The through hole (30) passes through the first plane end (12), the spherical protrusion and the spherical groove (20).

2. The stress-free pad structure according to claim 1, characterized in that: Also comprising a second block (40); The spherical groove (20) is arranged on the second block (40); The second block (40) comprises a second plane end (41), and the second plane end (41) is arranged opposite to the spherical groove (20).

3. The stress-free pad structure according to claim 2, characterized in that: The second plane end (41) is parallel to and in close contact with the optical device fixing seat (1).

4. The stress-free pad structure according to claim 2, characterized in that: The through hole (30) passes through the second planar end (41).

5. The stress-free pad structure according to claim 2, characterized in that: Also included is a gasket (50).

6. The stress-free pad structure according to claim 5, characterized in that: The gasket (50) is arranged between the second plane end (41) and the optical device fixing seat (1); And / or the gasket (50) is arranged between the first planar end (12) and the mounting platform (2).

7. The stress-free pad structure according to claim 2, characterized in that: The planar shape of the first planar end (12) includes a first circle; The planar shape of the planar end (41) of the second segment includes a square or a second circle.

8. The stress-free pad structure according to claim 7, characterized in that: The diameter of the first circle is set to L, and the aperture of the through hole (30) is set to φ; 2.5×φ≤L≤3.5×φ; φ≥φ0+0.5mm, φ0 represents the diameter of the fastener penetrating the through hole (30); The units of L, φ and φ0 are all mm; The spherical radius of the spherical protrusion is set to SR; The unit of SR is mm; The side length of the square is L or the diameter of the second circle is L.

9. The stress-free pad structure according to claim 1, characterized in that: The diameter of the through hole (30) is greater than the diameter of the fastener; The fastener passes through the through hole (30).

10. The stress-free pad structure according to claim 1, characterized in that: The contact area ratio between the spherical protrusion and the spherical groove (20) is greater than or equal to 90%.

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