Device for testing shock resistance of screen protection film

Abstract

The invention relates to the technical field of protective film testing, and discloses a screen protective film shock resistance testing device which comprises a bottom plate and a connecting frame arranged on the upper surface of the bottom plate, a protective film is fixed through adsorption holes of an adsorption plate, and the use state of the protective film attached to a real screen is simulated. The device can drive the rotating shaft and the hollow shaft to adjust the included angle between the impact head and the protective film to realize multi-angle impact test; the position of the impact head is adjusted by means of the first and second threaded rods, different point positions of the protective film are tested, and test data are enriched. The impact head supports rapid replacement, the impact resistance of the protective film under the impact heads in different shapes can be tested, and the test reduction degree and the data accuracy are improved. During replacement, the push ring is pushed along the adjusting groove, extrusion on the balls is relieved, clamping between the balls and the clamping grooves can be relieved, and the insertion rod is pulled out to complete disassembly. And after a new impact head insertion rod is installed, the push ring is loosened, the reset spring pushes the push ring to extrude the balls to be clamped into the clamping grooves, rapid locking is achieved, and replacement convenience is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of protective film testing technology, specifically to a device for testing the impact resistance of screen protectors. Background Technology

[0002] With the widespread use of electronic products such as smartphones, tablets, and smart wearable devices, the vulnerability of screens, as a core component of human-computer interaction, has become increasingly prominent. Screen protectors, as a key accessory protecting screens from scratches and impact damage, are experiencing a continuous rise in market demand, while users' requirements for their impact resistance are also constantly increasing. Impact resistance, as a core technical indicator of screen protectors, directly determines their protective effect on electronic product screens. Therefore, accurate and efficient testing of the impact resistance of screen protectors has become a crucial step in the manufacturing and quality inspection processes of screen protectors.

[0003] Existing testing devices typically use standard spherical or cylindrical impact heads. However, in real-world applications, screen protectors are subjected to a variety of impact objects. Testing with only circular or spherical impact heads cannot simulate the actual impact of different shaped objects on the screen protector, resulting in test results that do not accurately reflect the screen protector's impact resistance in actual use. Furthermore, existing testing devices often have a fixed vertical impact angle. In actual use, when electronic products are dropped or collided, the impact angle on the screen protector is often random, not just a vertical impact. A fixed vertical impact angle cannot reproduce multi-angle impact conditions, leading to a disconnect between the test scenario and actual working conditions, thus limiting the reference value of the test results. Existing devices often connect impact heads using bolts or complex snap-fit ​​structures, requiring specialized tools for replacement. This cumbersome disassembly and installation process reduces testing efficiency and increases the operational difficulty for testers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a screen protector impact resistance testing device, which solves the problems of limited test results and cumbersome impact head replacement in existing testing devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a screen protector impact resistance performance testing device, comprising a base plate and a connecting frame disposed on the upper surface of the base plate. The connecting frame has a lifting groove, and a lifting block is slidably connected within the lifting groove. A fixing plate is fixedly connected to the end of the lifting block away from the lifting groove. A mounting frame is fixedly connected to the end of the fixing plate near the base plate. A hollow shaft is rotatably connected to the mounting frame. A rotating frame is fixedly connected to the end of the hollow shaft away from the fixing plate. A shaft is rotatably connected within the rotating frame. A swing rod is fixedly connected to the outer wall of the shaft. A connecting cylinder is fixedly connected to the end of the swing rod away from the rotating frame. An insert rod is inserted into the connecting cylinder. Multiple rolling grooves are evenly distributed around the circumference of the connecting cylinder. Ball bearings are installed in the rolling grooves. An adjusting groove is formed on the outer wall of the connecting cylinder. An adjusting block is slidably connected within the adjusting groove. A push ring is slidably connected to the outer wall of the connecting cylinder and is fixedly connected to the adjusting block. A slot is formed on the insert rod, and the ball bearing engages with the slot.

[0006] Preferably, a rotating shaft is rotatably connected inside the rotating frame, and the rotating shaft is sleeved with a hollow shaft. A first bevel gear is fixedly connected to one end of the rotating shaft inside the rotating frame, and a second bevel gear is fixedly connected to the outer wall of the shaft, and the teeth of the first bevel gear mesh with the teeth of the second bevel gear.

[0007] Preferably, a return spring is sleeved on the outer wall of the connecting cylinder, and a retaining ring is fixedly connected to the outer wall of the connecting cylinder, with the return spring located between the retaining ring and the push ring.

[0008] Preferably, an adsorption plate and a vertical plate are fixedly connected to the upper surface of the base plate, and a first slide rail is fixedly connected to the end of the vertical plate near the adsorption plate.

[0009] Preferably, a first slide block is slidably connected inside the first slide rail, and a first threaded rod is rotatably connected inside the first slide rail, with the first threaded rod being threadedly connected to the first slide block.

[0010] Preferably, a second slide rail is fixedly connected to one end of the first slide block near the base plate, and a second slide block is slidably connected within the second slide rail.

[0011] Preferably, a second threaded rod is rotatably connected inside the second slide rail, and the second threaded rod is threadedly connected to the second slide block, and the connecting frame is fixedly connected to the second slide block.

[0012] Preferably, a hydraulic push rod is fixedly connected inside the connecting frame, and the output end of the hydraulic push rod is fixedly connected to the fixed plate.

[0013] Preferably, the insertion rod has an installation cavity, an acceleration sensor is fixedly connected in the installation cavity, and multiple adsorption holes are evenly distributed on the adsorption plate.

[0014] Preferably, an impact plate is slidably connected inside the mounting cavity, and an impact head is fixedly connected to the end of the impact plate away from the acceleration sensor, and the impact plate is adapted to the acceleration sensor.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses multiple adsorption holes on an adsorption plate to adsorb the protective film onto the plate, simulating the composite use of the protective film attached to a real screen. The angle between the impact head and the protective film is adjusted by driving a rotating shaft and a hollow shaft, enabling multi-angle impact testing of the protective film. The position of the impact head is adjusted by rotating the first and second threaded rods, allowing the impact head to test different positions on the protective film, resulting in richer test data. Furthermore, the impact head can be quickly replaced, testing the protective film's impact resistance under impact from impact heads of different shapes, improving the realism of the device's tests and the accuracy of the test data.

[0016] 2. In this invention, the push ring is pushed along the adjusting groove to release the pressure on the ball bearing, allowing the ball bearing to roll within the rolling groove. This automatically releases the engagement between the ball bearing and the slot. The insertion rod can then be pulled out of the connecting cylinder to disassemble the impact head. The insertion rod of the desired impact head is fully inserted into the connecting cylinder, the push ring is released, and the return spring pushes the push ring to compress the ball bearing, forcing it into the slot and engaging it with the slot. Under the pressure of the push ring, the impact head is locked, improving the convenience of impact head replacement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a screen protector impact resistance testing device according to the present invention; Figure 2 This is a cross-sectional view of the first slide rail of the screen protector impact resistance testing device of the present invention; Figure 3 This is a cross-sectional view of the connecting frame of the screen protector impact resistance performance testing device of the present invention; Figure 4 This is a cross-sectional view of the hollow shaft of the screen protector impact resistance testing device of the present invention; Figure 5 This is a cross-sectional view of the connecting cylinder of the screen protector impact resistance performance testing device of the present invention; Figure 6 This is a cross-sectional view of the insertion rod of a screen protector impact resistance testing device according to the present invention.

[0018] In the diagram: 1. Base plate; 2. Adsorption plate; 3. Vertical plate; 4. First slide rail; 5. Second slide rail; 6. Connecting frame; 7. First slide block; 8. First threaded rod; 9. Second slide block; 10. Second threaded rod; 11. Hydraulic push rod; 12. Lifting groove; 13. Lifting block; 14. Fixing plate; 15. Mounting frame; 16. Connecting cylinder; 17. Hollow shaft; 18. Rotating shaft; 19. Rotating frame; 20. Shaft; 21. Swing rod; 22. First bevel gear; 23. Second bevel gear; 24. Insert rod; 25. Push ring; 26. Retaining ring; 27. Return spring; 28. Adjusting groove; 29. ​​Adjusting block; 30. Rolling groove; 31. Ball bearing; 32. Slot; 33. Mounting cavity; 34. Acceleration sensor; 35. Impact plate; 36. Impact head; 37. Adsorption hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] refer to Figures 1-6 The screen protector impact resistance testing device shown includes a base plate 1 and a connecting frame 6 disposed on the upper surface of the base plate 1. A specific embodiment is shown below: Example 1 A hydraulic push rod 11 is fixedly connected inside the connecting frame 6. The output end of the hydraulic push rod 11 is fixedly connected to the fixed plate 14. A lifting groove 12 is provided on the connecting frame 6. A lifting block 13 is slidably connected inside the lifting groove 12. The end of the lifting block 13 away from the lifting groove 12 is fixedly connected to the fixed plate 14.

[0021] By integrating a proportional valve and a pressure sensor into the hydraulic control system that is matched with the hydraulic push rod 11, the hydraulic oil flow and pressure can be precisely adjusted, thereby controlling the extension and retraction speed and output force of the hydraulic push rod 11. The hydraulic push rod 11 pushes the fixed plate 14 to move along the lifting groove 12, preventing the fixed plate 14 from shifting during the movement.

[0022] A mounting bracket 15 is fixedly connected to one end of the fixed plate 14 near the base plate 1. A hollow shaft 17 is rotatably connected to the mounting bracket 15. A rotating frame 19 is fixedly connected to one end of the hollow shaft 17 away from the fixed plate 14. A shaft 20 is rotatably connected inside the rotating frame 19. A swing rod 21 is fixedly connected to the outer wall of the shaft 20. A connecting cylinder 16 is fixedly connected to one end of the swing rod 21 away from the rotating frame 19. A rotating shaft 18 is rotatably connected inside the rotating frame 19, and the rotating shaft 18 is sleeved and connected to the hollow shaft 17. A first bevel gear 22 is fixedly connected to one end of the rotating shaft 18 inside the rotating frame 19. A second bevel gear 23 is fixedly connected to the outer wall of the shaft 20, and the teeth of the first bevel gear 22 mesh with the teeth of the second bevel gear 23.

[0023] The hollow shaft 17 and the rotating shaft 18 are driven to rotate by drive motors that are matched with them. The rotation of the rotating shaft 18 drives the first bevel gear 22 to rotate, and the rotation of the first bevel gear 22 drives the second bevel gear 23 and the shaft 20 to rotate simultaneously, thereby adjusting the vertical angle of the swing rod 21. The rotation of the hollow shaft 17 adjusts the horizontal angle of the rotating frame 19 and the swing rod 21. Both the hollow shaft 17 and the rotating shaft 18 can operate independently, and can simultaneously adjust in different directions.

[0024] Example 2 A rod 24 is inserted into the connecting cylinder 16. Multiple rolling grooves 30 are evenly distributed around the connecting cylinder 16, and ball bearings 31 are installed in the rolling grooves 30. An adjustment groove 28 is formed on the outer wall of the connecting cylinder 16, and an adjustment block 29 is slidably connected in the adjustment groove 28. A push ring 25 is slidably connected to the outer wall of the connecting cylinder 16, and the push ring 25 is fixedly connected to the adjustment block 29. A slot 32 is formed on the rod 24, and the ball bearings 31 are engaged with the slot 32. A return spring 27 is sleeved on the outer wall of the connecting cylinder 16. A retaining ring 26 is fixedly connected to the outer wall of the connecting cylinder 16. The return spring 27 is located between the retaining ring 26 and the push ring 25. An installation cavity 33 is formed inside the rod 24, and an acceleration sensor 34 is fixedly connected in the installation cavity 33. An impact plate 35 is slidably connected in the installation cavity 33. An impact head 36 is fixedly connected to the end of the impact plate 35 away from the acceleration sensor 34, and the impact plate 35 is adapted to the acceleration sensor 34.

[0025] When the impact head 36 needs to be replaced, push the push ring 25 along the adjusting groove 28 towards the retaining ring 26. During the movement of the push ring 25, it compresses the return spring 27. When the push ring 25 moves away from the rolling groove 30, the ball 31 is released from the compression state with the push ring 25. At this time, the ball 31 can move freely in the rolling groove 30. As the ball 31 moves freely, the engagement between the ball 31 and the slot 32 is also released simultaneously. Pull the insert rod 24 out of the connecting cylinder 16 to complete the disassembly of the impact head 36. The impact angle of the impact head 36 can be adjusted synchronously by adjusting the angle of the swing rod 21. When the impact head 36 needs to be installed, keep the push ring 25 in the state of compressing the return spring 27 and fully insert the insert rod 24 into the connecting cylinder 16. At this time, the slot 32 on the insert rod 24 is located in the rolling groove 30. Below, the push ring 25 is released. Under the return force of the return spring 27, the push ring 25 moves in the opposite direction along the adjustment groove 28, and pushes multiple balls 31 into the slot 32 together, so that the balls 31 are engaged with the slot 32. Under the pressure of the push ring 25, the insertion rod 24 is locked. Under the push of the hydraulic push rod 11, the impact head 36 collides with the protective film. During the impact, the impact head 36 pushes the impact plate 35 in the opposite direction to move along the mounting cavity 33, so that the impact plate 35 squeezes the acceleration sensor 34, and collects data such as the peak contact force, impact duration, and energy absorption value at the moment of impact, and transmits them to the computer at the same time. By adjusting the impact angle of the impact head 36 and quickly replacing different impact heads 36, the impact resistance performance of the protective film under different impact angles and different types of impact heads 36 is tested.

[0026] Example 3 An adsorption plate 2 and a vertical plate 3 are fixedly connected to the upper surface of the base plate 1. A first slide rail 4 is fixedly connected to one end of the vertical plate 3 near the adsorption plate 2. A first slide block 7 is slidably connected inside the first slide rail 4. A first threaded rod 8 is rotatably connected inside the first slide rail 4 and is threadedly connected to the first slide block 7. A second slide rail 5 is fixedly connected to one end of the first slide block 7 near the base plate 1. A second slide block 9 is slidably connected inside the second slide rail 5. A second threaded rod 10 is rotatably connected inside the second slide rail 5 and is threadedly connected to the second slide block 9. A connecting frame 6 is fixedly connected to the second slide block 9. Multiple adsorption holes 37 are evenly opened on the adsorption plate 2.

[0027] The protective film placed on the adsorption plate 2 is adsorbed and fixed by the suction pump of the adsorption plate 2 to avoid displacement due to impact during the test, simulating the composite use state of the protective film attached to the real screen. The first slide 7 and the second slide rail 5 are moved by the rotation of the drive motor matched with the first threaded rod 8. The second slide 9 and the connecting frame 6 are moved by the rotation of the drive motor matched with the second threaded rod 10. The position of the impact head 36 is adjusted by the coordinated rotation of the first threaded rod 8 and the second threaded rod 10, so as to realize the test of the protective film at different positions. Moreover, the first threaded rod 8 and the second threaded rod 10 can be operated independently to adjust the position of the impact head 36 separately.

[0028] The working principle of this invention is as follows: The protective film placed on the adsorption plate 2 is adsorbed and fixed by the suction pump matched with the adsorption plate 2. The position of the impact head 36 is adjusted by the rotation of the first threaded rod 8 and the second threaded rod 10. The rotation of the rotating shaft 18 drives the first bevel gear 22 to rotate. The rotation of the first bevel gear 22 synchronously drives the second bevel gear 23 and the shaft 20 to rotate, thereby adjusting the vertical angle of the swing rod 21. The horizontal angle of the rotating frame 19 and the swing rod 21 is adjusted by the rotation of the hollow shaft 17. Since the connecting cylinder 16 is fixedly connected to the swing rod 21, the impact angle of the impact head 36 is adjusted synchronously. The hydraulic control system matched with the hydraulic push rod 11 integrates a proportional valve and a pressure sensor, which can accurately adjust the hydraulic oil flow and pressure, thereby controlling the extension speed and output force of the hydraulic push rod 11. The hydraulic push rod 11 pushes the fixed plate 14 to move along the lifting groove 12. The impact head 36 collides with the protective film. During the impact, the impact head 36 pushes the impact plate 35 to move along the mounting cavity 33 in the opposite direction. The impact plate 35 presses against the acceleration sensor 34, collecting data such as the peak contact force, impact duration, and energy absorption value at the moment of impact. When the impact head 36 needs to be replaced, the push ring 25 is pushed along the adjustment groove 28 towards the retaining ring 26. During the movement of the push ring 25, it presses against the return spring 27. When the push ring 25 moves away from the rolling groove 30, the ball 31 is released from the pressing state with the push ring 25. At this time, the ball 31 can move freely in the rolling groove 30. With the free movement of the ball 31, the ball 31 and the slot... The engagement between 32 is also released simultaneously. The insertion rod 24 is pulled out from the connecting cylinder 16, thus completing the disassembly of the impact head 36. When it is necessary to install the impact head 36, keep the push ring 25 in the state of squeezing the return spring 27, fully insert the insertion rod 24 into the connecting cylinder 16, release the push ring 25, and the push ring 25 is pushed by the return force of the return spring 27 to move in the opposite direction along the adjusting groove 28, and push the multiple balls 31 into the slot 32 together, so that the balls 31 are engaged with the slot 32, thus locking the insertion rod 24.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A screen protector impact resistance testing device, comprising a base plate (1) and a connecting frame (6) disposed on the upper surface of the base plate (1), characterized in that: The connecting frame (6) is provided with a lifting groove (12), and a lifting block (13) is slidably connected in the lifting groove (12). A fixing plate (14) is fixedly connected to the end of the lifting block (13) away from the lifting groove (12). A mounting frame (15) is fixedly connected to the end of the fixing plate (14) near the bottom plate (1). A hollow shaft (17) is rotatably connected to the mounting frame (15). A rotating frame (19) is fixedly connected to the end of the hollow shaft (17) away from the fixing plate (14). A shaft (20) is rotatably connected in the rotating frame (19). A swing rod (21) is fixedly connected to the outer wall of the shaft (20). A connecting cylinder (16) is fixedly connected to one end away from the rotating frame (19). A plug rod (24) is inserted into the connecting cylinder (16). Multiple rolling grooves (30) are evenly opened along the circumference of the connecting cylinder (16). Ball bearings (31) are installed in the rolling grooves (30). An adjustment groove (28) is opened on the outer wall of the connecting cylinder (16). An adjustment block (29) is slidably connected in the adjustment groove (28). A push ring (25) is slidably connected on the outer wall of the connecting cylinder (16). The push ring (25) is fixedly connected to the adjustment block (29). A slot (32) is opened on the plug rod (24). The ball bearings (31) are engaged with the slot (32).

2. The screen protector impact resistance testing device according to claim 1, characterized in that: The rotating frame (19) is rotatably connected to a rotating shaft (18), and the rotating shaft (18) is sleeved and connected to a hollow shaft (17). One end of the rotating shaft (18) located inside the rotating frame (19) is fixedly connected to a first bevel gear (22), and the outer wall of the shaft (20) is fixedly connected to a second bevel gear (23), and the teeth of the first bevel gear (22) mesh with the teeth of the second bevel gear (23).

3. The screen protector impact resistance testing device according to claim 1, characterized in that: The outer wall of the connecting cylinder (16) is fitted with a return spring (27), and a retaining ring (26) is fixedly connected to the outer wall of the connecting cylinder (16). The return spring (27) is located between the retaining ring (26) and the push ring (25).

4. The screen protector impact resistance testing device according to claim 1, characterized in that: An adsorption plate (2) and a vertical plate (3) are fixedly connected to the upper surface of the base plate (1), and a first slide rail (4) is fixedly connected to one end of the vertical plate (3) near the adsorption plate (2).

5. The screen protector impact resistance testing device according to claim 4, characterized in that: The first slide rail (4) is slidably connected to the first slide block (7), and the first threaded rod (8) is rotatably connected to the first slide rail (4), and the first threaded rod (8) is threadedly connected to the first slide block (7).

6. The screen protector impact resistance testing device according to claim 5, characterized in that: The first slide block (7) is fixedly connected to a second slide rail (5) at one end near the base plate (1), and a second slide block (9) is slidably connected inside the second slide rail (5).

7. The screen protector impact resistance testing device according to claim 6, characterized in that: The second slide rail (5) is rotatably connected to the second threaded rod (10), and the second threaded rod (10) is threadedly connected to the second slide block (9), and the connecting frame (6) is fixedly connected to the second slide block (9).

8. The screen protector impact resistance testing device according to claim 1, characterized in that: A hydraulic push rod (11) is fixedly connected inside the connecting frame (6), and the output end of the hydraulic push rod (11) is fixedly connected to the fixing plate (14).

9. The screen protector impact resistance testing device according to claim 4, characterized in that: An installation cavity (33) is provided inside the insertion rod (24), and an acceleration sensor (34) is fixedly connected inside the installation cavity (33). Multiple adsorption holes (37) are evenly provided on the adsorption plate (2).

10. The screen protector impact resistance testing device according to claim 9, characterized in that: An impact plate (35) is slidably connected inside the mounting cavity (33). An impact head (36) is fixedly connected to one end of the impact plate (35) away from the acceleration sensor (34), and the impact plate (35) is compatible with the acceleration sensor (34).

Images