A quick positioning fixture for touch screen switch detection

Abstract

This utility model relates to the field of touch screen switch testing, specifically disclosing a quick positioning fixture for touch screen switch testing, including a bracket, a guide rail, and a clamping assembly. The guide rail includes four vertically fixed guide rods, forming a cross shape. When it is necessary to clamp and position the touch screen switch, the touch screen switch is placed between the four positioning mechanisms. This utility model uses the rapid retraction of the piston rod of the cylinder to drive the traction seat to move downward at a uniform speed. Utilizing the traction of the traction rod, the traction block moves inward rapidly. As the angle between the traction rod and the traction block increases, the speed of the traction block gradually decreases, causing the clamping wheel to gradually slow down as it approaches the touch screen switch. At the same time, the tension spring between the traction block and the moving block provides a buffer when the clamping wheel clamps the touch screen switch, thereby achieving rapid clamping and positioning of the touch screen switch while avoiding damage to the touch screen switch due to excessive impact force from the clamping assembly.

Description

Technical Field

[0001] This utility model relates to the field of touch screen switch testing, specifically a quick positioning fixture for touch screen switch testing. Background Technology

[0002] As a core input component of smart home appliances, the performance and quality of touch screen switches are of paramount importance. During the manufacturing process of touch screen switches, various functions (such as touch sensitivity, linearity, response speed, durability, etc.) need to be rigorously tested. During testing, the touch screen switch is usually fixed on a fixture, and the output end of the touch screen switch is connected to an external testing device. A robotic arm touches the button position on the touch screen switch, and the testing device detects whether the corresponding function signal is output after the button is touched.

[0003] Currently, most fixtures used for positioning touchscreen switches employ manual positioning or simple pneumatic / mechanical clamping structures. Manual positioning is inefficient and inconsistent, making it difficult to meet the demands of rapid testing. While existing pneumatic or mechanical clamping fixtures improve efficiency to some extent, in pursuit of positioning speed, the clamping components of the fixtures (especially pneumatic fixtures) often move relatively quickly. This high-speed movement generates significant impact forces at the moment of clamping, which can easily damage the delicate surface or internal structure of the touchscreen switch. Utility Model Content

[0004] The purpose of this invention is to provide a quick positioning fixture for touch screen switch detection, which overcomes the above-mentioned defects in the prior art.

[0005] A quick positioning fixture for touch screen switch detection according to the present invention includes:

[0006] support;

[0007] The guide rail includes four vertically fixed guide rods, and the guide rail is in a cross shape;

[0008] The clamping assembly includes four positioning mechanisms that are slidably connected to four guide rods. Each positioning mechanism includes a traction block, a moving block, a moving rod, and a clamping wheel. The traction block and the moving block are slidably connected inside the guide rods. The traction block is located inside the moving block. A tension spring is fixed between the traction block and the moving block. The moving rod is fixed to the upper end face of the moving block. The clamping wheel is rotatably connected to the moving rod. The four positioning mechanisms move inward synchronously to clamp and position the touch screen switch.

[0009] A traction assembly is disposed below the clamping assembly. The traction assembly includes a cylinder, a traction seat, and four traction rods. The lower ends of the four traction rods are rotatably connected to the traction seat, and the upper ends of the four traction rods are rotatably connected to four traction blocks respectively. The traction seat is fixed to the upper end of the piston rod of the cylinder.

[0010] Preferably, the guide rod has a guide groove, and two symmetrically arranged support bars parallel to the length direction of the guide rod are fixed on the upper end surface of the guide rod. An upper through groove communicating with the guide groove is formed between the two support bars. The moving block and the traction block are slidably connected in the guide groove. The moving rod passes through the upper through groove, and the clamping wheel is located on the upper side of the support bar and abuts against the support bar.

[0011] Preferably, a vertically penetrating lower groove is formed on the bottom wall of the guide groove, and the upper end of the traction rod passes through the lower groove and can slide along it.

[0012] Preferably, a sliding rod is fixed to the side of the traction block near the moving block, and the sliding rod passes horizontally through the moving block and is slidably connected to it.

[0013] Preferably, a working plate is fixed between adjacent guide rods, and the upper surface of the working plate is flush with the upper surface of the guide groove.

[0014] Preferably, the bracket includes a base and a frame, the cylinder is fixed on the base, and the guide rod is fixed on the frame.

[0015] The beneficial effects of this utility model are as follows: When it is necessary to clamp and position the touch screen switch, the touch screen switch is placed between four positioning mechanisms. This utility model uses the rapid retraction of the piston rod of the cylinder to drive the traction seat to move downward at a constant speed. With the traction of the traction rod, the traction block moves inward quickly. As the angle between the traction rod and the traction block increases, the speed of the traction block gradually decreases, so that the clamping wheel gradually slows down when it approaches the touch screen switch. At the same time, the tension spring between the traction block and the moving block makes the clamping wheel form a buffer when clamping the touch screen switch, thereby achieving rapid clamping and positioning of the touch screen switch while avoiding damage to the touch screen switch due to excessive impact force of the clamping components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a utility model Figure 1 Enlarged view of point B in the middle;

[0019] Figure 4This is a cross-sectional view of the present invention;

[0020] Figure 5 This is a utility model Figure 1 Enlarged view of point C in the middle;

[0021] Figure 6 This is a utility model Figure 1 Enlarged view of point D;

[0022] Figure 7 This is a utility model Figure 1 Enlarged diagram of point E in the middle.

[0023] In the picture:

[0024] 10. Base; 11. Frame; 20. Guide rod; 21. Working plate; 22. Guide groove; 23. Support bar; 24. Upper through groove; 25. Lower through groove; 30. Clamping wheel; 31. Moving rod; 32. Moving block; 33. Traction block; 34. Tension spring; 35. Slide rod; 40. Cylinder; 41. Traction rod; 42. Traction seat. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are merely simplified descriptions for the convenience of describing this utility model, and are not intended to 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 this utility model.

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. As used herein, the terms up and down and left and right are not limited to their strict geometric definitions, but include tolerances for reasonable and inconsistent machining or human errors. The specific features of a quick positioning fixture for touch screen switch detection are described in detail below:

[0027] One embodiment of this utility model:

[0028] Reference Figures 1-7 This utility model provides a quick positioning fixture for touch screen switch detection, comprising:

[0029] support;

[0030] The guide rail includes four vertically fixed guide rods 20, and the guide rail is in a cross shape;

[0031] The clamping assembly includes four positioning mechanisms that are slidably connected to four guide rods 20. Each positioning mechanism includes a traction block 33, a moving block 32, a moving rod 31, and a clamping wheel 30. The traction block 33 and the moving block 32 are slidably connected inside the guide rods 20. The traction block 33 is located inside the moving block 32. A tension spring 34 is fixed between the traction block 33 and the moving block 32. The moving rod 31 is fixed to the upper end face of the moving block 32. The clamping wheel 30 is rotatably connected to the moving rod 31. The clamping wheel 30 is made of rubber to further improve the buffer when the clamping wheel 30 clamps the touch screen switch. The touch screen switch is clamped and positioned by the four positioning mechanisms moving inward synchronously.

[0032] The traction assembly is located below the clamping assembly. The traction assembly includes a cylinder 40, a traction seat 42, and four traction rods 41. The lower ends of the four traction rods 41 are rotatably connected to the traction seat 42, and the upper ends of the four traction rods 41 are rotatably connected to four traction blocks 33 respectively. The traction seat 42 is fixed to the upper end of the piston rod of the cylinder 40.

[0033] A guide groove 22 is provided inside the guide rod 20. Two symmetrically arranged support bars 23 are fixed on the upper end surface of the guide rod 20 and are parallel to the length direction of the guide rod 20. An upper through groove 24 communicating with the guide groove 22 is formed between the two support bars 23. The moving block 32 and the traction block 33 are slidably connected in the guide groove 22. The moving rod 31 passes through the upper through groove 24. The clamping wheel 30 is located on the upper side of the support bar 23 and abuts against the support bar 23.

[0034] A vertically penetrating lower through groove 25 is opened on the bottom wall of the guide groove 22, and the upper end of the traction rod 41 passes through the lower through groove 25 and can slide along it.

[0035] A slide rod 35 is fixed to the side of the traction block 33 near the moving block 32. The slide rod 35 passes horizontally through the moving block 32 and is slidably connected to it.

[0036] A working plate 21 is fixed between adjacent guide rods 20, and the upper surface of the working plate 21 is flush with the upper surface of the guide groove 22.

[0037] The bracket includes a base 10 and a frame 11. The cylinder 40 is fixed on the base 10, and the guide rod 20 is fixed on the frame 11.

[0038] In use, the four positioning mechanisms are at their furthest positions. The touch screen switch is placed on the clamping assembly, with the touch screen switch positioned between the four positioning mechanisms. In this embodiment, the cylinder 40 can be a Festo ADN series cylinder (e.g., Festo ADN-50-60-A-PPS-A cylinder). By incorporating a PPS pneumatic terminal position buffer, the exhaust rate of the buffer air cushion can be dynamically adjusted according to the load and speed, reducing end impact and improving overall speed stability. This allows the piston rod of the cylinder 40 to maintain a stable speed extension and retraction even when the load changes little. Therefore, after starting the cylinder 40, the piston rod on the cylinder 40 shortens at a relatively constant speed, thereby driving the traction seat 42 to move downward. Through the traction of the traction rod 41, the four traction blocks 33 move synchronously towards the touch screen switch.

[0039] The inward movement of the traction block 33 causes the moving block 32 to move inward, which in turn drives the moving rod 31 to move inward, thereby causing the clamping wheel 30 to move inward until the four clamping wheels 30 clamp the touch screen switch.

[0040] During this process, as the angle between the traction rod 41 and the traction block 33 gradually increases, the speed at which the traction block 33 moves inward gradually changes from large to small, thereby reducing the impact force when the clamping wheel 30 clamps the touch screen switch, while ensuring that the clamping wheel 30 can quickly clamp the touch screen switch.

[0041] When the clamping wheel 30 contacts the touch screen switch, the tension of the stretching spring 34 further reduces the impact force of the clamping wheel 30 when it touches the touch screen switch. When all four clamping wheels 30 clamp the touch screen switch, the cylinder 40 closes.

[0042] Thanks to the four tension springs 34, even if the four clamping wheels 30 cannot clamp the touch screen switch synchronously, as the traction block 33 continues to move inward, the four clamping wheels 30 will eventually clamp the touch screen switch.

[0043] After the test is completed, cylinder 40 restarts, and its piston rod extends, thereby driving the four positioning mechanisms to move outward to their maximum positions.

[0044] Those skilled in the art will appreciate that various modifications to the above embodiments can be made without departing from the overall spirit and concept of this utility model. All such modifications fall within the protection scope of this utility model. The protection scheme of this utility model is defined by the appended claims.

Claims

1. A quick positioning fixture for touch screen switch detection, characterized in that, include: support; The guide rail includes four vertically fixed guide rods (20), and the guide rail is in the shape of a cross. The clamping assembly includes four positioning mechanisms that are slidably connected to four guide rods (20). Each positioning mechanism includes a traction block (33), a moving block (32), a moving rod (31), and a clamping wheel (30). The traction block (33) and the moving block (32) are slidably connected inside the guide rods (20). The traction block (33) is located inside the moving block (32). A tension spring (34) is fixed between the traction block (33) and the moving block (32). The moving rod (31) is fixed to the upper end face of the moving block (32). The clamping wheel (30) is rotatably connected to the moving rod (31). The four positioning mechanisms move inward synchronously to clamp and position the touch screen switch. A traction assembly is disposed on the lower side of the clamping assembly. The traction assembly includes a cylinder (40), a traction seat (42), and four traction rods (41). The lower ends of the four traction rods (41) are rotatably connected to the traction seat (42), and the upper ends of the four traction rods (41) are rotatably connected to four traction blocks (33) respectively. The traction seat (42) is fixed to the upper end of the piston rod of the cylinder (40).

2. The quick positioning fixture for touch screen switch detection according to claim 1, characterized in that, The guide rod (20) has a guide groove (22) inside. Two symmetrically arranged support bars (23) are fixed on the upper end face of the guide rod (20) and parallel to the length direction of the guide rod (20). An upper through groove (24) is formed between the two support bars (23) and communicates with the guide groove (22). The moving block (32) and the traction block (33) are slidably connected in the guide groove (22). The moving rod (31) passes through the upper through groove (24). The clamping wheel (30) is located on the upper side of the support bar (23) and abuts against the support bar (23).

3. The quick positioning fixture for touch screen switch detection according to claim 2, characterized in that, A vertically penetrating lower groove (25) is provided on the bottom wall of the guide groove (22), and the upper end of the traction rod (41) passes through the lower groove (25) and can slide along it.

4. The quick positioning fixture for touch screen switch detection according to claim 1, characterized in that, The traction block (33) has a slide rod (35) fixed on the side near the moving block (32), and the slide rod (35) passes horizontally through the moving block (32) and is slidably connected to it.

5. A quick positioning fixture for touchscreen switch detection according to claim 2, characterized in that, A working plate (21) is fixed between adjacent guide rods (20), and the upper surface of the working plate (21) is flush with the upper surface of the guide groove (22).

6. A quick positioning fixture for touchscreen switch detection according to claim 1, characterized in that, The bracket includes a base (10) and a frame (11), the cylinder (40) is fixed on the base (10), and the guide rod (20) is fixed on the frame (11).

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