A 3c product protection film strength testing device

Abstract

The utility model relates to protection film strength detection technical field, and disclose a kind of 3C product protection film strength testing device, including base, still including fixed installation in the upper surface of base lifting control module, fixed installation in the top of lifting control module mounting rail, fixed installation in the top of mounting rail air cylinder, fixedly connected in the output end of air cylinder detection seat and fixed installation in the bottom of detection seat multiple detection heads, the upper surface of base is provided with the positioning module of adaptation 3C product surface camber. The 3C product protection film strength testing device, when the 3C product to be measured is placed on base, its back is contacted with capsule bag, in the process of placing, capsule bag can produce self-adapting deformation, closely adhere to the curved surface profile of the back of product, the role of reinforcing rib is played by the several septa of linear array fixed installation in the top inner surface of capsule bag in the process of deformation, to provide a accurate and stable profiling support for the strength test of upper protection film.

Description

Technical Field

[0001] This utility model relates to the field of protective film strength testing technology, specifically a protective film strength testing device for 3C products. Background Technology

[0002] The 3C product protective film strength testing device is a specialized device for evaluating the performance of 3C product protective films. It can simulate various mechanical forces that the protective film may encounter during actual use, thereby accurately testing key performance indicators such as the strength, abrasion resistance, and impact resistance of the protective film. The strength testing device mainly simulates the squeezing, scratching, and other conditions that the protective film may suffer in actual use by applying external forces of different intensities, and accurately measures the mechanical performance indicators such as the compressive strength and bending strength of the protective film.

[0003] According to a public notice (Announcement No.: CN120314046A) of a 3C product protective film strength testing device, the above application, through the setting of structures such as a circular frame, an electric telescopic cylinder and a telescopic rod, can automatically change the testing head of different hardness and move the position of the testing head on the protective film after each round of testing, realizing a high degree of automation in the testing process, which not only significantly improves the testing efficiency but also reduces manual intervention.

[0004] However, in actual use, 3C products have diverse shapes, including 2.5D curved surfaces, 3D curved surfaces, and flat surfaces. The testing device needs to be equipped with a support fixture that perfectly matches the shape of the product under test. Changing the product model means changing the fixture, which increases the cost and storage complexity. In view of this, we propose a 3C product protective film strength testing device. Utility Model Content

[0005] The purpose of this invention is to provide a 3C product protective film strength testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a 3C product protective film strength testing device, comprising a base, a lifting control module fixedly installed on the upper surface of the base, a mounting rail fixedly installed on the top of the lifting control module, a cylinder fixedly installed on the top of the mounting rail, a detection seat fixedly connected to the output end of the cylinder, and multiple sets of detection heads fixedly installed at the bottom of the detection seat. The upper surface of the base is provided with a positioning module adapted to the surface curvature of the 3C product. The positioning module includes a fixing rod fixedly installed on the inner wall of the top of the base. A clamping plate is sleeved on the outer wall of the fixing rod. A large spring is fixedly connected between the lower surface of the clamping plate and the inner wall of the top of the base. A pouch is fixedly installed on the lower surface of the clamping plate. Several spacers are fixedly installed in a linear array on the inner surface of the top of the pouch.

[0007] Preferably, the bottom inner wall of the clamp has a receiving cavity adapted to the shape of the bag, and the bottom edge of the receiving cavity is rounded.

[0008] Preferably, the inside of the bag is filled with hydraulic oil, and the amount of hydraulic oil is 90% to 95% of the bag volume.

[0009] Preferably, a piston cylinder is installed through and fixedly mounted on the inner wall of the top of the pouch; a piston rod is installed through and slidably mounted on the inner wall of the top of the piston cylinder; a sliding rod is installed through and fixedly mounted on the inner wall of the top of the piston rod; a piston plate is fixedly mounted on the bottom end of the piston rod; a transmission rod is slidably mounted on the inner wall of the clamping plate; a small spring is fixedly connected between the end of the transmission rod and the inner wall of the clamping plate; a straight groove is formed on the inner wall of the transmission rod, and the straight groove slides in cooperation with the sliding rod; a nut is threadedly connected to the top outer wall of the fixing rod; an annular groove is formed on the lower surface of the nut; and a compression block is movably mounted on the inner surface of the annular groove.

[0010] Preferably, a right-angled trapezoidal block is provided on the upper surface of the end of the transmission rod near the fixed rod, and the lower surface of the extrusion block is provided in an inclined shape to match the right-angled trapezoidal block.

[0011] Preferably, the inner wall of the transmission rod near the straight groove has a rectangular groove with a width greater than the diameter of the piston rod, and the piston rod is disposed inside the rectangular groove.

[0012] Preferably, the straight groove is configured as an inclined shape, with the end away from the fixed rod being higher and the end closer to the fixed rod being lower.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When the 3C product to be tested is placed on the base, its back side contacts the bag. During the placement process, the clamp can be adjusted in position along the fixing rod, and the large spring provides buffering and stable support. The bag can produce adaptive deformation, closely conforming to the different curved contours of the back of the product. Several partitions fixedly installed in a linear array on the inner surface of the top of the bag act as reinforcing ribs during the deformation process, effectively limiting the disorderly expansion of the bag and ensuring that the deformation is controllable and stable, thereby providing a precise and stable conformal support for the strength test of the upper protective film. Secondly, when the nut at the top of the fixing rod is tightened, it presses down on the compression block, pushing the transmission rod to slide horizontally inward against the elastic force of the small spring. The inclined straight groove on the inner wall of the transmission rod slides and engages with the slide rod fixed at the top of the piston rod. The horizontal movement of the transmission rod is converted into the vertical downward movement of the piston rod. The piston rod then drives the piston plate at the bottom to move down in the piston cylinder, reducing the volume of the closed cavity inside the bag, thereby significantly increasing its internal hydraulic pressure. This pressure increase further compacts the flexible bag that has completed adaptive attachment, instantly transforming it into a near-rigid solid support, firmly locking the product. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the base structure of this utility model; Figure 3 This is a bottom view of the clamping plate structure of this utility model; Figure 4 This is a schematic cross-sectional view of the clamping plate of this utility model; Figure 5 This is a schematic cross-sectional view of the bag structure of this utility model.

[0015] In the diagram: 1. Base; 2. Lifting control module; 3. Mounting rail; 4. Cylinder; 5. Detection seat; 6. Detection head; 7. Fixing rod; 8. Large spring; 9. Clamping plate; 10. Bag; 11. Spacer; 12. Nut; 13. Extrusion block; 14. Transmission rod; 15. Small spring; 16. Straight groove; 17. Piston cylinder; 18. Piston rod; 19. Piston plate; 20. Slide rod; 21. Annular groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 This utility model provides a technical solution: a 3C product protective film strength testing device, including a base 1, a lifting control module 2 fixedly installed on the upper surface of the base 1, a mounting rail 3 fixedly installed on the top of the lifting control module 2, a cylinder 4 fixedly installed on the top of the mounting rail 3, a detection seat 5 fixedly connected to the output end of the cylinder 4, and multiple sets of detection heads 6 fixedly installed on the bottom of the detection seat 5.

[0018] The height of the mounting rail 3 is controlled by the lifting control module 2, which facilitates the adjustment of the device in both detection and replacement modes. This avoids damage to the detection head 6 when replacing the protective film to be tested, thus preventing any impact on the subsequent normal operation of the equipment. At the same time, the position of the detection seat 5 is controlled in the horizontal direction by the cylinder 4, which, together with several detection heads 6, enables the strength detection of various positions of the protective film.

[0019] The upper surface of the base 1 is provided with a positioning module adapted to the curvature of the 3C product surface. The positioning module includes a fixing rod 7 fixedly installed on the inner wall of the top of the base 1. A clamping plate 9 is sleeved on the outer wall of the fixing rod 7. A large spring 8 is fixedly connected between the lower surface of the clamping plate 9 and the inner wall of the top of the base 1. A pouch 10 is fixedly installed on the lower surface of the clamping plate 9. Several spacers 11 are fixedly installed in a linear array on the inner surface of the top of the pouch 10.

[0020] Please see Figures 3-5 The positioning module, through the fluid medium filled in the pouch 10, can actively conform to the different 2.5D curved surfaces, 3D curved surfaces, or flat surfaces on the back of different 3C products. This effectively solves the problems of high cost and complex warehousing management caused by the need for customized support fixtures for different product models in traditional testing devices. The pouch 10 is hollow inside, which makes it easy to fill and also allows the pouch 10 to deform slightly to adapt to the outer surface of the protective film.

[0021] The bottom inner wall of the clamp 9 has a receiving cavity that matches the shape of the bag 10, and the bottom edge of the receiving cavity is rounded.

[0022] The bag 10 is provided with precise installation positioning and a space to accommodate it, ensuring that the bag 10 is stable in position during the initial state and deformation process and will not shift. The rounded corner design at the bottom edge can effectively avoid stress concentration and cutting effect on the bag 10 material by the sharp edge of the clamping plate 9 during repeated deformation of the bag 10, thereby significantly extending the service life of the bag 10 and improving the reliability and durability of the device.

[0023] The inside of the bladder 10 is filled with hydraulic oil, and the amount of hydraulic oil is 90% to 95% of the volume of the bladder 10.

[0024] When the pouch 10 conforms to the product's shape and the system locks, the hydraulic oil instantly and evenly transmits pressure, making the entire pouch 10 a near-rigid solid support. This ensures the accuracy of test data for the rigid shell of 3C products during strength testing. In addition, the 90% to 95% filling volume ensures that the pouch 10 has sufficient redundancy in its free state to adapt to products with different curved surfaces. At the same time, it ensures that the amount of air remaining inside the pouch 10 is minimized after locking, thereby maximizing the support rigidity. Too little filling will result in insufficient support rigidity, while too much filling will cause the pouch 10 to lose its deformation ability and fail to conform.

[0025] A piston cylinder 17 is fixedly installed through the inner wall of the top of the pouch 10. A piston rod 18 is slidably installed through the inner wall of the top of the piston cylinder 17. A slide rod 20 is fixedly installed through the inner wall of the top of the piston rod 18. A piston plate 19 is fixedly installed at the bottom of the piston rod 18. A transmission rod 14 is slidably installed on the inner wall of the clamping plate 9. A small spring 15 is fixedly connected between the end of the transmission rod 14 and the inner wall of the clamping plate 9. A straight groove 16 is opened on the inner wall of the transmission rod 14. The straight groove 16 is slidably engaged with the slide rod 20. A nut 12 is threadedly connected to the outer wall of the top of the fixing rod 7. An annular groove 21 is opened on the lower surface of the nut 12. A compression block 13 is movably installed on the inner surface of the annular groove 21.

[0026] After the pouch 10 adapts to the product, it can be locked in its current state, transforming it from a flexible clamp into a rigid support. Tightening the nut 12 presses down the compression block 13, which pushes the transmission rod 14 to slide inward against the elastic force of the small spring 15. The inclined straight groove 16 on the transmission rod 14 slides into the sliding rod 20 at the top of the piston rod 18, converting the horizontal movement of the transmission rod 14 into the downward vertical movement of the piston rod 18. The piston rod 18 drives the piston plate 19 to move downward in the piston cylinder 17, which is equivalent to reducing the internal volume of the pouch 10, thereby increasing its internal hydraulic pressure. This increased pressure further compacts and rigidifies the pouch 10, ultimately firmly holding the product and providing stable support. This design supports stepless pressure fine-tuning, and the user can precisely control the final support rigidity by rotating the nut 12.

[0027] A right-angled trapezoidal block is provided on the upper surface of the transmission rod 14 near the fixed rod 7, and the lower surface of the extrusion block 13 is set in an inclined shape to match the right-angled trapezoidal block.

[0028] The cooperation between the right-angled trapezoidal block and the extrusion block 13 ensures the efficient and smooth transmission of force between the extrusion block 13 and the transmission rod 14. The inclined lower surface of the extrusion block 13 cooperates with the inclined surface of the right-angled trapezoidal block of the transmission rod 14, which can efficiently convert the downward pressure generated by the rotation of the nut 12 into a force that pushes the transmission rod 14 to move horizontally inward, and compress the small spring 15.

[0029] The inner wall of the transmission rod 14 near the straight groove 16 has a rectangular groove with a width greater than the diameter of the piston rod 18, and the piston rod 18 is located inside the rectangular groove.

[0030] The rectangular groove provides ample space for the piston rod 18 to move, avoiding motion interference. This ensures that when the transmission rod 14 slides horizontally, its straight groove 16 can always maintain contact with the slide rod 20 and drive its movement without interfering with the piston rod 18, thus guaranteeing the smooth operation and reliability of the entire force transmission mechanism.

[0031] The straight groove 16 is set in an inclined shape, with the end away from the fixed rod 7 being higher and the end close to the fixed rod 7 being lower.

[0032] When the transmission rod 14 moves horizontally towards the fixed rod 7, the straight groove 16, being lower on the inside and higher on the outside, forces the sliding rod 20 to slide downwards along the groove wall, thus precisely converting the horizontal motion into a downward vertical motion. This drives the piston rod 18 to press down, which in turn pressurizes the piston cylinder 17 with the piston plate 19, thereby pressurizing the internal cavity of the bag 10 to maintain the pressure balance within the bag 10. This allows the bag 10 to fit more tightly against the outer surface of the protective film, thus achieving its positioning and preventing vibration during the strength testing process from interfering with the positioning stability of the protective film.

[0033] Working principle: First, the operator places the 3C product to be tested on the positioning module above the base 1, so that its back side contacts the bag 10. When the product is placed, the hydraulic oil filled inside the bag 10 will flow under pressure, causing the bag 10 to undergo adaptive deformation, thus closely conforming to the different curved contours of the back of the product. It can effectively adapt to 2.5D curved surfaces, 3D curved surfaces or flat surfaces. Several spacers 11 linearly arrayed and fixedly installed on the inner surface of the top of the bag 10 act as reinforcing ribs during the deformation process, effectively limiting the disorderly expansion of the bag 10 and ensuring that the deformation is controllable and stable. Subsequently, the bladder 10 is locked and its rigidity is switched. The operator tightens the nut 12 threaded to the top outer wall of the fixing rod 7. The nut 12 moves downward, and the compression block 13, which is movably installed in the annular groove 21 on its lower surface, descends accordingly. The inclined design of the lower surface of the compression block 13 matches the right-angled trapezoidal block set on the upper surface of the transmission rod 14 near the fixing rod 7. The downward pressing motion of the compression block 13 is converted into a horizontal inward pushing force on the transmission rod 14. The transmission rod 14 overcomes the elastic force of the small spring 15 fixedly connected between its end and the inner wall of the clamping plate 9 and slides inward. The straight groove 16 interacts with the slide rod 20 fixedly installed at the top of the piston rod 18. With a sliding fit, the slide rod 20 is forced to move downwards along the groove wall, thus precisely converting the horizontal movement of the transmission rod 14 into the vertical downward movement of the piston rod 18. The piston plate 19, which is fixedly installed at the bottom end of the piston rod 18, moves downwards within the piston cylinder 17, which is fixedly installed on the inner wall of the top of the pouch 10. The downward movement of the piston plate 19 reduces the volume of the closed cavity inside the pouch 10, thereby significantly increasing its internal hydraulic pressure. This pressure increase further compacts the originally flexible pouch 10, transforming it into a near-rigid solid support, ultimately firmly holding and locking the 3C product, providing stable and reliable conformal support for the strength test of the protective film on it. After the workpiece is positioned and locked, the test program is started. The lifting control module 2, which is fixedly installed on the upper surface of the base 1, starts to work and adjusts the mounting rail 3 at its top to a suitable height. The cylinder 4, which is fixedly installed on the top of the mounting rail 3, is started, and its output end drives the test seat 5 to move horizontally. The multiple test heads 6, which are fixedly installed at the bottom of the test seat 5, then reach the predetermined test position and apply test force to the protective film on the surface of the 3C product to simulate the squeezing, scratching and other conditions in actual use, so as to complete the test of the strength, wear resistance and other performance indicators of the protective film.

Claims

1. A 3C product protective film strength testing device, comprising a base (1), and further comprising a lifting control module (2) fixedly installed on the upper surface of the base (1), a mounting rail (3) fixedly installed on the top of the lifting control module (2), a cylinder (4) fixedly installed on the top of the mounting rail (3), a detection seat (5) fixedly connected to the output end of the cylinder (4), and multiple sets of detection heads (6) fixedly installed on the bottom of the detection seat (5), characterized in that: The upper surface of the base (1) is provided with a positioning module adapted to the surface curvature of 3C products. The positioning module includes a fixing rod (7) fixedly installed on the inner wall of the top of the base (1). A clamping plate (9) is sleeved on the outer wall of the fixing rod (7). A large spring (8) is fixedly connected between the lower surface of the clamping plate (9) and the inner wall of the top of the base (1). A pouch (10) is fixedly installed on the lower surface of the clamping plate (9). Several spacers (11) are fixedly installed in a linear array on the inner surface of the top of the pouch (10).

2. The 3C product protective film strength testing device according to claim 1, characterized in that: The bottom inner wall of the clamp (9) is provided with a receiving cavity that matches the shape of the bag (10), and the bottom edge of the receiving cavity is rounded.

3. The 3C product protective film strength testing device according to claim 1, characterized in that: The inside of the bladder (10) is filled with hydraulic oil, and the amount of hydraulic oil is 90% to 95% of the volume of the bladder (10).

4. The 3C product protective film strength testing device according to claim 1, characterized in that: A piston cylinder (17) is fixedly installed through the inner wall of the top of the bag (10). A piston rod (18) is slidably installed through the inner wall of the top of the piston cylinder (17). A slide rod (20) is fixedly installed through the inner wall of the top of the piston rod (18). A piston plate (19) is fixedly installed at the bottom of the piston rod (18). A transmission rod (14) is slidably installed on the inner wall of the clamping plate (9). A small spring (15) is fixedly connected between the end of the transmission rod (14) and the inner wall of the clamping plate (9). A straight groove (16) is opened on the inner wall of the transmission rod (14). The straight groove (16) is slidably engaged with the slide rod (20). A nut (12) is threadedly connected to the outer wall of the top of the fixing rod (7). An annular groove (21) is opened on the lower surface of the nut (12). A compression block (13) is movably installed on the inner surface of the annular groove (21).

5. The 3C product protective film strength testing device according to claim 4, characterized in that: The transmission rod (14) has a right-angled trapezoidal block on the upper surface of the end near the fixed rod (7), and the lower surface of the extrusion block (13) is set in an inclined shape to match the right-angled trapezoidal block.

6. The 3C product protective film strength testing device according to claim 4, characterized in that: The transmission rod (14) has a rectangular groove with a width greater than the diameter of the piston rod (18) on the inner wall of the end near the straight groove (16), and the piston rod (18) is located inside the rectangular groove.

7. The 3C product protective film strength testing device according to claim 4, characterized in that: The straight groove (16) is set in an inclined shape with the end away from the fixed rod (7) being high and the end close to the fixed rod (7) being low.

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