Frame pressure maintaining device and pressure maintaining method
By designing a frame pressure holding device with a wedge-shaped pressing surface and a pressure-receiving mechanism, the problem of poor pressure holding effect in the prior art is solved, and more precise lateral pressure application and normal force uniform distribution are achieved, thereby improving the pressure holding effect.
Patent Information
- Application Number
- CN202510134996.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2045-02-07
AI Technical Summary
The existing frame pressure holding device has insufficient requirements in ensuring initial accuracy and monitoring normal forces, resulting in poor pressure holding effect.
A mirror frame pressure-keeping device is designed, using a pressing block with a wedge-shaped pressing surface and a pressing mechanism. The control tool is driven through the linear module No. 1, and combined with the clamping component and the driving component, the lateral pressure on the pressing block is realized to ensure that the pressure is concentrated in the normal direction of the V-groove.
The device can apply lateral pressure more accurately, improve the pressure holding effect, and facilitate monitoring and calculation of the pressure holding value, ensuring uniform distribution of normal forces.
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Figure CN119572599B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of pressure-maintaining equipment, and in particular to a frame pressure-maintaining device and a pressure-maintaining method. Background Art
[0002] The frame of the electronic glasses is equipped with electronic devices and circuits. The frame is provided with a cavity for laying electronic devices and circuits. The cross section of the cavity is a V-shaped groove. During manufacturing, the soft row needs to be fixed on the V-shaped groove with double-sided tape, and then the soft row is pressure-maintained at the double-sided tape bonding position. The traditional pressure-maintaining method is to directly drive the pressure block from the top of the V-shaped groove downward into the V-shaped groove for pressure maintenance. However, this method is not conducive to achieving absolute accuracy in ensuring the initial accuracy of pressure maintenance, nor is it conducive to monitoring the normal force on the V-shaped groove surface, which reduces the effect of pressure maintenance.
[0003] In view of this, it is necessary to provide a frame pressure maintaining device and a pressure maintaining method. Summary of the invention
[0004] The present invention provides a spectacles frame pressure-maintaining device and a pressure-maintaining method, which effectively solve the problem that the existing pressure-maintaining device has a low pressure-maintaining effect on the spectacles frame.
[0005] The technical solution adopted by the present invention is:
[0006] The frame pressure-maintaining device comprises a frame, a fixture, a No. 1 linear module arranged on the frame along the Y-axis direction for driving the fixture to move, a pressure block with a wedge-shaped pressure surface, and a pressure mechanism for applying lateral pressure to the pressure block, wherein the pressure mechanism comprises a No. 1 support fixedly arranged on the frame, a driving component arranged on the No. 1 support along the X-axis direction, a lifting component arranged on the No. 1 support along the Z-axis direction, a lifting plate driven by the lifting component, a clamping component arranged on the lifting plate and capable of opening and closing along the X-axis direction, and an opening component arranged on the lifting plate for driving the clamping component to open; the clamping component comprises a No. 1 linear guide arranged on the lifting plate along the X-axis direction, a No. 1 clamping jaw and a No. 2 clamping jaw slidably arranged on the No. 1 linear guide, and a tension spring connecting the No. 1 clamping jaw and the No. 2 clamping jaw, and the No. 1 clamping jaw can be driven by the driving component.
[0007] Furthermore, the No. 1 clamp and the No. 2 clamp both include a No. 1 plate slidably connected to the No. 1 linear guide rail, a No. 1 claw toe arranged at the lower end of the No. 1 plate, and a roller assembly arranged at the upper end of the No. 1 plate and located on one side of the clamping surface, wherein the roller assembly is used to be slidably connected to the spreading assembly.
[0008] Furthermore, the No. 1 clamping jaw also includes a convex plate arranged on the No. 1 plate.
[0009] Furthermore, the convex plate is used for docking with the driving assembly.
[0010] Furthermore, the roller assembly includes a No. 1 shaft arranged on the No. 1 plate along the Y-axis direction, and a ball bearing whose inner ring is fixedly connected to the No. 1 shaft.
[0011] Furthermore, the spreading assembly includes a No. 1 cylinder fixedly arranged on the lifting plate along the Z-axis direction and a supporting block fixedly arranged at the output end of the No. 1 cylinder, and the supporting block is symmetrically provided with inclined surfaces for abutting against the opposite sides of the No. 1 clamping jaw and the No. 2 clamping jaw.
[0012] Furthermore, the driving assembly includes a pressure sensor, a mounting frame arranged on a No. 1 support, a No. 1 electric cylinder arranged on the mounting frame along the X-axis direction, an L-shaped mounting plate arranged at the output end of the No. 1 electric cylinder, and a pressure head. The two ends of the pressure sensor are fixedly connected to the L-shaped mounting plate and the pressure head respectively, and the pressure head is used to drive the No. 1 clamp.
[0013] Furthermore, the driving assembly also includes a No. 2 linear guide rail arranged on the cylinder body of the No. 1 electric cylinder, and the L-shaped mounting plate is slidably connected to the No. 2 linear guide rail.
[0014] Furthermore, a positioning hole is provided on the upper end surface of the fixture, and a clamping assembly is also provided on the lifting plate. The clamping assembly includes a No. 2 cylinder arranged on the lifting plate along the Z-axis direction, an L-shaped block fixedly arranged at the output end of the No. 2 cylinder, and a positioning column arranged on the lower end surface of the L-shaped block, and the positioning column can extend into the positioning hole.
[0015] The frame pressure-maintaining method adopts a frame pressure-maintaining device, places the frame on a jig, and then inserts a pressure block into the glue position of a groove of the frame, and then a No. 1 linear module drives the jig to move to the position to be pressure-maintained, firstly moves downward by the spreading component, so that the No. 1 clamp and the No. 2 clamp are spread open, and the tension spring is stretched and deformed; then the lifting component drives the lifting plate to drive the clamping component to move downward, so that the pressure block is located between the No. 1 clamp and the No. 2 clamp, and then the spreading component is separated from the clamping component, so that the No. 1 clamp and the No. 2 clamp are closed, and after closing, the No. 1 clamp and the No. 2 clamp automatically move along the No. 1 linear guide rail, so that the pressures of the No. 1 clamp and the No. 2 clamp on both sides of the pressure block are the same when not affected by the force of the driving component, and then the driving component applies pressure to the No. 1 clamp from the side, so that the No. 1 clamp applies lateral pressure to the frame by the No. 1 clamp to maintain pressure.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] The driving component is used to drive the pressure block laterally to ensure that the pressure block applies lateral pressure to the pressure holding point in the groove of the frame, which is convenient for monitoring the pressure holding time and pressure. By inserting the pressure block into the V-groove of the frame, and then clamping the pressure block after automatic centering by the clamping component, the clamping component and the pressure block can move synchronously, and finally the driving component is used to apply lateral pressure to the clamping component. Compared with directly applying vertical pressure to the pressure block, it is easier to calculate the pressure value of the pressure holding, and it is easier to apply pressure in the normal direction of the V-groove.
[0018] The driving assembly is not directly connected to the pressing block, but the pressure of the driving assembly is transmitted to the pressing block through the clamping assembly. The clamping assembly adopts an automatic centering design, so that the No. 1 clamping jaw and the No. 2 clamping jaw can move synchronously along the No. 1 linear guide rail, so that the clamping force on both sides of the pressing block is balanced, and the pressing block will not be deflected after being clamped by the clamping assembly.
[0019] The opening of the No. 1 clamp and the No. 2 clamp is achieved by lowering the opening assembly, and both the No. 1 clamp and the No. 2 clamp are provided with roller assemblies, which can ensure the convenience and stability of the opening and closing of the No. 1 clamp and the No. 2 clamp.
[0020] By clamping the fixture with the clamping assembly, it is possible to effectively prevent the fixture from tilting during the pressure holding process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is an overall schematic diagram of a frame pressure-maintaining device provided in an embodiment of the present application.
[0022] Figure 2 A schematic diagram of a driving assembly, a lifting assembly, a lifting plate, an opening assembly, a clamping assembly and a pressing assembly of a frame pressure-maintaining device provided in an embodiment of the present application.
[0023] Figure 3 A schematic diagram of a driving assembly, a lifting assembly, a lifting plate and a clamping assembly of a frame pressure-maintaining device provided in an embodiment of the present application.
[0024] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.
[0025] The markings in the figure are: 1. frame; 2. fixture; 3. No. 1 linear module; 4. pressure block; 5. No. 1 support; 6. drive assembly; 7. lifting assembly; 8. lifting plate; 9. clamping assembly; 10. opening assembly; 91. No. 1 linear guide; 92. No. 1 clamping jaw; 93. No. 2 clamping jaw; 94. tension spring; 921. No. 1 plate; 922. No. 1 claw toe; 923. roller assembly; 924. convex plate; 101. No. 1 cylinder; 102. support block; 61. pressure sensor; 62. mounting frame; 63. No. 1 electric cylinder; 64. L-shaped mounting plate; 65. pressure head; 66. No. 2 linear guide; 11. clamping assembly; 111. No. 2 cylinder; 112. L-shaped block; 113. positioning column; 100. mirror frame. DETAILED DESCRIPTION
[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0027] like Figure 1 As shown, the first embodiment provided by the present application is a frame pressure-maintaining device, the structure of which includes a frame 1, a fixture 2, a No. 1 linear module 3 arranged on the frame 1 along the Y-axis direction for driving the fixture 2 to move, and also includes a pressure block 4 with a wedge-shaped pressure surface and a pressure mechanism for applying lateral pressure to the pressure block 4, the pressure mechanism includes a No. 1 support 5 fixedly arranged on the frame 1, a driving component 6 arranged on the No. 1 support 5 along the X-axis direction, a lifting component 7 arranged on the No. 1 support 5 along the Z-axis direction, a lifting plate 8 driven by the lifting component 7, a clamping component 9 arranged on the lifting plate 8 and capable of opening and closing along the X-axis direction, and an opening component 10 arranged on the lifting plate 8 for driving the clamping component 9 to open. As shown Figure 2 As shown, the clamping assembly 9 includes a No. 1 linear guide rail 91 arranged on the lifting plate 8 along the X-axis direction, a No. 1 clamp 92 and a No. 2 clamp 93 slidingly arranged on the No. 1 linear guide rail 91, and a tension spring 94 connecting the No. 1 clamp 92 and the No. 2 clamp 93. The No. 1 clamp 92 can be driven by the driving assembly 6.
[0028] It should be noted that the position of the frame 100 that needs to maintain pressure is located on the groove surface of the V-shaped groove.
[0029] In actual use, the frame 100 is placed on the fixture 2, and then the pressure block 4 is inserted into the gluing position of the groove of the frame 100. Then the No. 1 linear module 3 drives the fixture 2 to move to the position to be pressurized, and then the pressure mechanism applies lateral pressure to the pressure block 4: first, the opening component 10 moves downward to open the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93, and the tension spring 94 is stretched and deformed; then the lifting component 7 drives the lifting plate 8 to drive the clamping component 9 to move downward, so that the pressure block 4 is located between the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93. The stretching assembly 10 is then disengaged from the clamping assembly 9, so that the No. 1 jaw 92 and the No. 2 jaw 93 are closed. After closing, the No. 1 jaw 92 and the No. 2 jaw 93 automatically move along the No. 1 linear guide rail 91, so that the pressures of the No. 1 jaw 92 and the No. 2 jaw 93 on both sides of the pressing block 4 are the same without the force of the driving assembly 6. Then, pressure is applied to the No. 1 jaw 92 from the side through the driving assembly 6, so that the No. 1 jaw 92 applies lateral pressure to the frame 100 to maintain the pressure.
[0030] In the above design, it is convenient to monitor the pressure applied to the No. 1 clamp 92 to ensure that the applied pressure acts more concentratedly in the normal direction of the V-groove. At the same time, the clamping assembly 9 transfers the pressure of the driving assembly 6 to the pressure block 4. The clamping assembly 9 adopts an automatic centering design, so that the No. 1 clamp 92 and the No. 2 clamp 93 can move synchronously along the No. 1 linear guide rail 91, so that the clamping forces on both sides of the pressure block 4 are balanced, ensuring that the pressure block 4 is accurately inserted into the V-groove, and will not cause the pressure block 4 to be deflected after being clamped by the clamping assembly 9.
[0031] Specifically: Figure 3 and Figure 4 As shown, the No. 1 clamp 92 and the No. 2 clamp 93 both include a No. 1 plate 921 slidably connected to the No. 1 linear guide rail 91, a No. 1 claw toe 922 arranged at the lower end of the No. 1 plate 921, and a roller assembly 923 arranged at the upper end of the No. 1 plate 921 and located on one side of the clamping surface, and the roller assembly 923 is used for sliding connection with the expansion assembly 10.
[0032] In actual use, when the spreading assembly 10 moves downward, it contacts the two roller assemblies 923, and the first clamping jaw 92 and the second clamping jaw 93 are spread apart as the spreading assembly 10 moves downward. When the pressing block 4 is located between the first clamping jaw 92 and the second clamping jaw 93, the spreading assembly 10 moves upward, so that the first clamping jaw 92 and the second clamping jaw 93 are reset and closed, and the two first claws 922 are used to clamp the pressing block 4.
[0033] In the above design, the structural design and specific implementation of the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93 facilitate the clamping of the pressure block 4 , and at the same time, the roller assembly 923 can be used to reduce the frictional force in contact with the expansion assembly 10 .
[0034] Specifically: Figure 4 As shown, the No. 1 clamping jaw 92 further includes a protruding plate 924 disposed on the No. 1 plate 921 .
[0035] In actual use, the driving assembly 6 drives the convex plate 924 to make the entire No. 1 clamping jaw 92 apply pressure to the pressing block 4.
[0036] In the above design, the structural design of the convex plate 924 facilitates the driving component 6 to apply pressure to the first clamping jaw 92 .
[0037] Specifically: the protruding plate 924 is used to dock with the driving assembly 6.
[0038] In the above design, the convex plate 924 is driven by the driving assembly 6 to drive the entire first clamping jaw 92 to move, thereby achieving lateral pressure on the pressing block 4.
[0039] Specifically, the roller assembly 923 includes a No. 1 shaft disposed on the No. 1 plate 921 along the Y-axis direction, and a ball bearing whose inner ring is fixedly connected to the No. 1 shaft.
[0040] In actual use, when the spreading assembly 10 moves downward to spread the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93 , the spreading assembly 10 is in rolling contact with the ball bearing.
[0041] In the above design, the structural design and specific implementation of the roller assembly 923 facilitate reducing the friction force during the action of the spreading assembly 10 on the clamping assembly 9, thereby reducing the wear of the spreading assembly 10 and the clamping assembly 9.
[0042] Specifically: Figure 2 As shown, the spreading assembly 10 includes a No. 1 cylinder 101 fixedly arranged on the lifting plate 8 along the Z-axis direction and a support block 102 fixedly arranged at the output end of the No. 1 cylinder 101, and the support block 102 is symmetrically provided with inclined surfaces for abutting against the opposite sides of the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93.
[0043] In actual use, when the clamping assembly 9 needs to be opened, the support block 102 is driven downward by the No. 1 cylinder 101, so that the two inclined surfaces of the support block 102 respectively generate sliding friction with the No. 1 clamp 92 and the No. 2 clamp 93, driving the No. 1 clamp 92 and the No. 2 clamp 93 to open.
[0044] In the above-mentioned design, the structural design and specific implementation method of the spreading assembly 10 facilitate the opening of the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93 .
[0045] Specifically: Figure 2As shown, the driving assembly 6 includes a pressure sensor 61, a mounting frame 62 arranged on the No. 1 support 5, a No. 1 electric cylinder 63 arranged on the mounting frame 62 along the X-axis direction, an L-shaped mounting plate 64 arranged at the output end of the No. 1 electric cylinder 63, and a pressure head 65. The two ends of the pressure sensor 61 are fixedly connected to the L-shaped mounting plate 64 and the pressure head 65 respectively, and the pressure head 65 is used to drive the No. 1 clamp 92.
[0046] In actual use, the No. 1 electric cylinder 63 drives the L-shaped mounting plate 64 to move toward the No. 1 clamp 92 , so that the pressure head 65 applies pressure to the No. 1 clamp 92 , and the pressure applied to the No. 1 clamp 92 is monitored in real time by the pressure sensor 61 .
[0047] In the above-mentioned design, the structural design and specific implementation of the driving assembly 6 facilitate the lateral pressure on the No. 1 clamping jaw 92 and timely monitoring of the pressure of the lateral pressure.
[0048] Specifically: Figure 2 As shown, the driving assembly 6 also includes a No. 2 linear guide rail 66 arranged on the cylinder body of the No. 1 electric cylinder 63, and the L-shaped mounting plate 64 is slidably connected to the No. 2 linear guide rail 66.
[0049] In actual use, when the L-shaped mounting plate 64 is driven by the No. 1 electric cylinder 63 , the L-shaped mounting plate 64 slides along the No. 2 linear guide rail 66 .
[0050] In the above design, the structural design and specific implementation method of the driving assembly 6 can effectively ensure the stability of the L-shaped mounting plate 64 during the movement.
[0051] Specifically: Figure 2 As shown, a positioning hole is provided on the upper end surface of the fixture 2, and a clamping assembly 11 is also provided on the lifting plate 8. The clamping assembly 11 includes a No. 2 cylinder 111 arranged on the lifting plate 8 along the Z-axis direction, an L-shaped block 112 fixedly arranged at the output end of the No. 2 cylinder 111, and a positioning column 113 arranged on the lower end surface of the L-shaped block 112, and the positioning column 113 can extend into the positioning hole.
[0052] In actual use, after the fixture 2 is moved into position, the No. 2 air cylinder 111 drives the L-shaped block 112 to move downward, so that the positioning column 113 extends into the positioning hole of the fixture 2.
[0053] In the above design, the structural design and specific implementation of the fixture 2 and the clamping assembly 11 facilitate the fixation of the fixture 2 to prevent the fixture 2 from being unstable during the pressure-maintaining process.
[0054] The second embodiment provided by the present application is a frame pressure-maintaining method, which adopts a frame pressure-maintaining device, places the frame 100 on the fixture 2, and then inserts the pressure block 4 into the gluing position of the groove of the frame 100, and then the No. 1 linear module 3 drives the fixture 2 to move to the position to be pressure-maintained, first moves down by the opening component 10, so that the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93 are opened, and the tension spring 94 is stretched and deformed; then the lifting component 7 drives the lifting plate 8 to drive the clamping component 9 to move down, so that the pressure block 4 is located at the No. 1 clamping jaw 92 The first and second jaws 92 and 93 are connected by the drive assembly 6, and the pressure on the two sides of the pressing block 4 is the same. Then, the drive assembly 6 applies pressure to the first jaw 92 from the side, so that the first jaw 92 can apply lateral pressure to the frame 100 to maintain the pressure.
[0055] In the above design, the clamping assembly 9 is conveniently designed to be automatically centered, so that the No. 1 clamping jaw 92 and the No. 2 clamping jaw 93 can move synchronously along the No. 1 linear guide rail 91, so that the clamping forces on both sides of the pressure block 4 are balanced, and the pressure block 4 will not be deflected after being clamped by the clamping assembly 9.
[0056] To further explain in detail, it should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A frame pressure-maintaining device, comprising a frame, a fixture, and a linear module No. 1 arranged on the frame along the Y-axis direction for driving the fixture to move, characterized in that: It also includes a pressure block with a wedge-shaped pressure surface and a pressure mechanism for applying lateral pressure to the pressure block, the pressure mechanism includes a No. 1 support fixedly arranged on the frame, a driving component arranged on the No. 1 support along the X-axis direction, a lifting component arranged on the No. 1 support along the Z-axis direction, a lifting plate driven by the lifting component, a clamping component arranged on the lifting plate and capable of opening and closing along the X-axis direction, and an opening component arranged on the lifting plate for driving the clamping component to open; the clamping component includes a No. 1 linear guide rail arranged on the lifting plate along the X-axis direction, a No. 1 clamping jaw and a No. 2 clamping jaw slidingly arranged on the No. 1 linear guide rail, and a tension spring connecting the No. 1 clamping jaw and the No. 2 clamping jaw, and the No. 1 clamping jaw can be driven by the driving component; when the frame is under pressure, the frame is placed on the fixture, and then Insert the pressure block into the glue position of the groove of the frame, and then the No. 1 linear module drives the fixture to move to the position to be maintained, first move downward by the expansion component, so that the No. 1 clamp and the No. 2 clamp are expanded, and the tension spring is stretched and deformed; then the lifting component drives the lifting plate to drive the clamping component to move downward, so that the pressure block is located between the No. 1 clamp and the No. 2 clamp, and then the expansion component is separated from the clamping component, so that the No. 1 clamp and the No. 2 clamp are closed. After closing, the No. 1 clamp and the No. 2 clamp automatically move along the No. 1 linear guide rail, so that the pressure of the No. 1 clamp and the No. 2 clamp on both sides of the pressure block is the same without the force of the driving component, and then the driving component applies pressure to the No. 1 clamp from the side, so that the No. 1 clamp applies lateral pressure to the frame by the No. 1 clamp to maintain the pressure.
2. The frame pressure-maintaining device according to claim 1, characterized in that: The No. 1 clamp and the No. 2 clamp both include a No. 1 plate slidably connected to the No. 1 linear guide rail, a No. 1 claw toe arranged at the lower end of the No. 1 plate, and a roller assembly arranged at the upper end of the No. 1 plate and located on one side of the clamping surface, wherein the roller assembly is used for sliding connection with the spreading assembly.
3. The frame pressure-maintaining device according to claim 2, characterized in that: The No. 1 clamping jaw also includes a convex plate arranged on the No. 1 plate.
4. The frame pressure-maintaining device according to claim 3, characterized in that: The convex plate is used for docking with the driving assembly.
5. The frame pressure-maintaining device according to claim 2, characterized in that: The roller assembly includes a No. 1 shaft arranged on a No. 1 plate along the Y-axis direction, and a ball bearing whose inner ring is fixedly connected to the No. 1 shaft.
6. The frame pressure-maintaining device according to claim 1, characterized in that: The support assembly includes a No. 1 cylinder fixedly arranged on the lifting plate along the Z-axis direction and a support block fixedly arranged at the output end of the No. 1 cylinder, and the support block is symmetrically provided with inclined surfaces for abutting against the opposite sides of the No. 1 clamping jaw and the No. 2 clamping jaw.
7. The frame pressure-maintaining device according to claim 1, characterized in that: The driving assembly includes a pressure sensor, a mounting frame arranged on a No. 1 support, a No. 1 electric cylinder arranged on the mounting frame along the X-axis direction, an L-shaped mounting plate arranged at the output end of the No. 1 electric cylinder, and a pressure head. The two ends of the pressure sensor are respectively fixedly connected to the L-shaped mounting plate and the pressure head, and the pressure head is used to drive the No. 1 clamp.
8. The frame pressure-maintaining device according to claim 7, characterized in that: The driving assembly also includes a No. 2 linear guide rail arranged on the cylinder body of the No. 1 electric cylinder, and the L-shaped mounting plate is slidably connected to the No. 2 linear guide rail.
9. The frame pressure-maintaining device according to claim 1, characterized in that: A positioning hole is provided on the upper end surface of the fixture, and a clamping assembly is also provided on the lifting plate. The clamping assembly includes a No. 2 cylinder arranged on the lifting plate along the Z-axis direction, an L-shaped block fixedly arranged at the output end of the No. 2 cylinder, and a positioning column arranged on the lower end surface of the L-shaped block, and the positioning column can extend into the positioning hole.
Citation Information
Patent Citations
Pressure maintaining jig and pressure maintaining method
CN116480666A
Automatic assembling equipment for automobile rearview mirror
CN118106903A