Equipment for detecting strength of double-sided PET (Polyethylene Terephthalate) hardened film

Abstract

The invention relates to the technical field of hardened film detection, in particular to double-sided PET hardened film strength detection equipment. Comprising a baseplate; two supporting plates are arranged at the upper end of the bottom plate in a bilateral symmetry mode, and a detection mechanism located between the two supporting plates is arranged on the bottom plate; the detection mechanism provided by the invention covers two basic shape friction modes of an arc-shaped surface and a plane, and a supported state and a non-supported state are respectively considered under each shape, so that more friction scenes in actual use can be simulated, the wear resistance of the hard coating film under different working conditions can be evaluated, and the wear resistance of the hard coating film under different working conditions can be evaluated. And the applicability and the accuracy of the test are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hardened film detection, and in particular to a double-sided PET hardened film strength detection device. Background Art

[0002] Double-sided PET hardened film is a specially treated polyester film. It is made by coating a layer of special material on both sides of a flexible substrate to increase its surface hardness and wear resistance. While maintaining good protection performance, the double-sided PET hardened film can also adapt to a certain degree of bending deformation; this hardened film is often used to protect the screens of electronic devices, such as touch screen protection, optical lenses, folding screens, etc., to prevent them from being scratched or damaged during daily use; and the double-sided PET hardened film needs to be tested for wear resistance after production. The wear resistance test of the double-sided PET hardened film is an important step in evaluating its surface treatment quality and durability.

[0003] Wear resistance testing is usually aimed at determining whether the surface of a hardened film can withstand the friction and wear of daily use without losing transparency and without scratches or damage. In the existing wear resistance testing of hardened films, the hardened film is placed on a platform and then rubbed back and forth with a friction block, and then the hardened film is checked to see if it loses transparency or has obvious scratches and damage.

[0004] The following problems exist in the current test process of the wear resistance of hardened films: the application position of the hardened film is different, it may be used in a horizontal position or in a curved position, and the use position with or without support is also not exactly the same. The specific method of only placing the hardened film on the platform for friction testing cannot fully reflect the wear resistance of the hardened film in different usage scenarios, resulting in the test results lacking sufficient reference value in practical applications. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides a double-sided PET hardened film strength detection device to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: The embodiment of the present application provides a double-sided PET hardened film strength detection device, including a base plate; two support plates are symmetrically arranged on the upper end of the base plate, and a detection mechanism is arranged on the base plate and located between the two support plates.

[0007] The detection mechanism includes a fixed plate, a fixed plate is installed on the upper end of the base plate, and the fixed plate has an inverted D-shaped structure, a slide plate is installed on the upper end of the fixed plate so as to slide evenly from front to back, a base is installed on the upper end of the slide plate through a roller shaft, the rear end surface of the base is an arc surface, a friction block is arranged on the rear side of the base, and the friction block has a D-shaped structure.

[0008] As a preferred solution, the support plate is provided with a fixing mechanism corresponding one to one with the base.

[0009] As a preferred embodiment, the base plate is provided with a swinging part for driving the friction block to reciprocate for friction detection, the swinging part is provided with a conversion part for adjusting the horizontal surface and the curved surface of the friction block to sequentially fit the friction with the hardened film, the base plate is provided with a guide part, and the slide plate is provided with a limit part for limiting the rotation of the base and adjusting the position of the curved surface and the horizontal surface of the base.

[0010] As a preferred embodiment, the swinging part includes a shaft column, and the middle part of the lower end of the friction block is equipped with a shaft column, and the upper end of the fixed plate is rotatably equipped with a rotating shaft corresponding to the base one by one, and the rotating shaft is concentric with the arc surface of the corresponding base, and a square tube located above the fixed plate is rotatably equipped on the rotating shaft, and a sliding rod is slidably equipped in the square tube, and the front end of the sliding rod slides through the corresponding square tube and is rotatably connected to the corresponding shaft column, and an actuator for driving the rotating shaft to rotate is arranged on the fixed plate.

[0011] As a preferred embodiment, the actuator includes a spur gear, and the lower end of the rotating shaft is installed with a spur gear after rotating through the fixed plate, and a rack corresponding to the spur gear is slidably installed at the lower end of the horizontal section of the fixed plate, and the rack is meshed with the corresponding spur gear, and a connecting plate is installed between two adjacent racks, a slider is installed at the front end of the rack located at the front, and a push-pull assembly for reciprocatingly pushing and pulling the slider is provided on the fixed plate.

[0012] As a preferred solution, the push-pull assembly includes a stepper motor, and the stepper motor is installed on the upper end of the fixed plate. A cam is installed after the output shaft of the stepper motor rotates and passes through the fixed plate, and a connecting rod is hinged between the cam and the slider.

[0013] As a preferred embodiment, the conversion part includes a limit plate, a limit plate located above the corresponding square tube is fixedly mounted on the shaft column, two No. 1 limit columns are slidably mounted on the limit plate, a No. 1 connecting plate is commonly mounted on the upper ends of the two No. 1 limit columns on the same limit plate, a No. 1 tension spring is arranged between the No. 1 connecting plate and the corresponding limit plate, and a No. 1 limit hole cooperating with the corresponding two No. 1 limit columns is opened on the square tube and the sliding rod.

[0014] As a preferred embodiment, the limiting part includes a No. 2 limiting column, and two No. 2 limiting columns are symmetrically arranged on the upper end of the base. A No. 2 connecting plate is commonly installed on the upper ends of the two limiting columns on the same base, and a No. 2 tension spring is installed between the No. 2 connecting plate and the corresponding base. The slide plate is provided with No. 2 limiting holes corresponding to the corresponding No. 2 limiting columns one by one. The upper end of the No. 2 limiting column slides through the corresponding base and cooperates with the corresponding No. 2 limiting hole. A driving component for driving the slide plate to move is arranged on the fixed plate.

[0015] As a preferred solution, the guide portion includes a guide groove, and the upper end of the fixed plate is provided with a guide groove which corresponds one-to-one with the No. 1 limiting column and is located in front of the corresponding friction block.

[0016] As a preferred solution, the fixing mechanism includes a T-shaped column, and two T-shaped columns symmetrically arranged on the back sides of the two support plates, a compression spring is installed between the vertical section of the T-shaped column and the corresponding support plate, and the horizontal sections of the two symmetrical T-shaped columns slide through the corresponding support plates and are jointly installed with a support plate, which has an inverted L-shaped structure and is provided with a clamping portion for clamping and fixing the end of the hardened film.

[0017] As a preferred embodiment, the clamping portion includes a support plate, a support plate is fixedly installed on the side of the longitudinal section of the support plate away from the corresponding support plate, a cylinder is installed at the rear end of the support plate, and a pressure plate located on the rear side of the corresponding support plate is installed after the telescopic section of the cylinder slides through the transverse section of the corresponding support plate, and the pressure plate is slidably connected to the corresponding support plate.

[0018] As a preferred solution, the driving assembly includes a shaft seat, and a screw rod is rotatably mounted on the left end of the left vertical section of the fixed plate through the shaft seat, and the screw rod is threadedly connected to the slide plate.

[0019] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. The detection mechanism provided in the present invention covers two basic friction modes of curved surface and plane surface, and each shape considers two states, supported and unsupported, respectively, so as to simulate more friction scenarios in actual use, and ensure that the wear resistance of the hardened film under different working conditions can be evaluated, thereby improving the applicability and accuracy of the test.

[0020] 2. The conversion part provided in the present invention limits the sliding of the slide bar in the square cylinder through the cooperation of the No. 1 limit column and the No. 1 limit hole, so that the square cylinder rotates, and the friction block rotates while its horizontal plane is kept perpendicular to the slide bar, so as to rub the hardened film through its arc surface, and the rotating limit plate drives the friction block to rotate so that its horizontal plane fits with the hardened film. At this time, the No. 1 limit column cooperates with the guide groove, so that the slide bar can slide in the square cylinder when the square cylinder rotates, thereby pushing the friction block to maintain horizontal reciprocating movement, so as to rub the hardened film through the horizontal surface of the friction block.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure when testing the hardened film in this application.

[0024] Figure 2 It is a schematic structural diagram of the clamping part of the present application.

[0025] Figure 3 for Figure 2 A magnified view of the structure in the middle.

[0026] Figure 4 This is a schematic diagram of the structure of the limiting part of the present application.

[0027] Figure 5 This is a schematic diagram of the structure of the conversion unit of this application.

[0028] Figure 6 This is a schematic diagram of the structure of the executive component of this application.

[0029] Figure numerals: 10, bottom plate; 11, support plate; 2, detection mechanism; 20, fixed plate; 21, slide plate; 22, roller shaft; 23, base; 24, friction block; 25, swing part; 250, shaft column; 251, rotating shaft; 252, square tube; 253, slide rod; 4, actuator; 40, spur gear; 41, rack; 42, connecting plate; 43, slide block; 44, stepping motor; 45, cam; 46, connecting rod; 26, conversion 1. Part; 260. Limiting plate; 261. Limiting column No. 1; 262. Connecting plate No. 1; 263. Tension spring No. 1; 27. Guide part; 270. Guide groove; 28. Limiting part; 280. Limiting column No. 2; 281. Connecting plate No. 2; 282. Tension spring No. 2; 283. Screw rod; 3. Fixing mechanism; 30. T-column; 31. Compression spring; 32. Support plate; 33. Clamping part; 330. Support plate; 331. Cylinder; 332. Pressure plate. DETAILED DESCRIPTION

[0030] 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 in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] like Figure 1 As shown, a double-sided PET hardened film strength testing device includes a base plate 10; two support plates 11 are symmetrically arranged at the upper end of the base plate 10, and a testing mechanism 2 is arranged on the base plate 10 and located between the two support plates 11.

[0032] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the detection mechanism 2 includes a fixed plate 20, the upper end of the base plate 10 is installed with the fixed plate 20, and the fixed plate 20 is an inverted D-shaped structure, the upper end of the fixed plate 20 is evenly slidably installed with a slide plate 21 from front to back, the upper end of the slide plate 21 is rotatably installed with a base 23 through a roller shaft 22, the rear end surface of the base 23 is an arc surface, and the rear side of the base 23 is provided with a friction block 24, and the friction block 24 is a D-shaped structure.

[0033] like Figure 1 As shown, the support plate 11 is provided with a fixing mechanism 3 corresponding to the base 23 one by one.

[0034] like Figure 1 and Figure 2 As shown, the base plate 10 is provided with a swinging portion 25 for driving the friction block 24 to reciprocate for friction detection, the swinging portion 25 is provided with a conversion portion 26 for adjusting the horizontal surface and the arc surface of the friction block 24 to sequentially fit the friction with the hardened film, the base plate 10 is provided with a guide portion 27, and the slide plate 21 is provided with a limit portion 28 for limiting the rotation of the base 23 and adjusting the position of the arc surface and the horizontal surface of the base 23.

[0035] During specific operation, the hardened film is manually placed between two left and right opposite fixing mechanisms 3, and the hardened film is fixed by the fixing mechanisms 3. Then, the conversion part 26 adjusts the arc surface or horizontal surface of the friction block 24 to be close to the hardened film, and the position of the horizontal surface and the arc surface of the base 23 are adjusted according to the position of the horizontal surface and the arc surface of the friction block 24 by the limiting part 28. Then, the swinging part 25 drives the friction block 24 to reciprocate to rub the hardened film, and observes whether the hardened film loses its transparency after friction and whether there are scratches and damages.

[0036] like Figure 1 and Figure 2 As shown, the fixing mechanism 3 includes a T-shaped column 30, and two T-shaped columns 30 are symmetrically arranged on the back sides of the two support plates 11. A compression spring 31 is installed between the vertical section of the T-shaped column 30 and the corresponding support plate 11. The horizontal sections of the two symmetrical T-shaped columns 30 slide through the corresponding support plates 11 and are jointly installed with a support plate 32. The support plate 32 is an inverted L-shaped structure, and a clamping portion 33 for clamping and fixing the end of the hardened film is provided on the support plate 32.

[0037] like Figure 1 and Figure 2 As shown, the clamping portion 33 includes a support plate 330, and the support plate 330 is fixedly installed on the side of the longitudinal section of the support plate 32 away from the corresponding support plate 11, and a cylinder 331 is installed at the rear end of the support plate 32. After the telescopic section of the cylinder 331 slides through the corresponding transverse section of the support plate 32, a pressure plate 332 located on the rear side of the corresponding support plate 330 is installed, and the pressure plate 332 is slidably connected to the corresponding support plate 32.

[0038] During specific operation, the hardened film is manually placed between two left and right opposite fixing mechanisms 3, and the end of the hardened film is placed between the corresponding pressure plate 332 and the support plate 330, and then the cylinder 331 pushes the corresponding pressure plate 332 to move toward the corresponding support plate 330 to squeeze and fix the hardened film. After that, the detection mechanism 2 rubs the hardened film, and during the friction process, the friction block 24 will press the hardened film, and when pressing the hardened film, it will pull the corresponding T-shaped column 30 and compress the corresponding compression spring 31 to prevent the hardened film from being stretched and causing a change in size, so that the hardened film can be bent and rubbed at the original size during the pressing process.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the swinging part 25 includes a shaft column 250, and the middle part of the lower end of the friction block 24 is installed with a shaft column 250. The upper end of the fixed plate 20 is rotatably installed with a rotating shaft 251 corresponding to the base 23, and the rotating shaft 251 is concentric with the arc surface of the corresponding base 23. A square tube 252 located above the fixed plate 20 is rotatably installed on the rotating shaft 251, and a sliding rod 253 is slidably installed in the square tube 252. The front end of the sliding rod 253 slides through the corresponding square tube 252 and is rotatably connected to the corresponding shaft column 250. The fixed plate 20 is provided with an actuator 4 for driving the rotating shaft 251 to rotate.

[0040] like Figure 2 , Figure 3 and Figure 5 As shown, the conversion part 26 includes a limit plate 260, and the shaft column 250 is fixedly mounted with a limit plate 260 located above the corresponding square tube 252, and two No. 1 limit columns 261 are slidably mounted on the limit plate 260, and a No. 1 connecting plate 262 is commonly mounted on the upper ends of the two No. 1 limit columns 261 on the same limit plate 260, and a No. 1 tension spring 263 is arranged between the No. 1 connecting plate 262 and the corresponding limit plate 260, and a No. 1 limit hole cooperating with the corresponding two No. 1 limit columns 261 is opened on the square tube 252 and the sliding rod 253.

[0041] like Figure 1 , Figure 4 and Figure 5 As shown, the guide portion 27 includes a guide groove 270 , and the upper end of the fixing plate 20 is provided with a guide groove 270 which corresponds to the first limiting column 261 and is located in front of the corresponding friction block 24 .

[0042] like Figure 2 , Figure 4 and Figure 5 As shown, the limiting portion 28 includes a No. 2 limiting column 280, and two No. 2 limiting columns 280 are symmetrically arranged on the upper end of the base 23. A No. 2 connecting plate 281 is commonly installed on the upper ends of the two limiting columns on the same base 23, and a No. 2 tension spring 282 is installed between the No. 2 connecting plate 281 and the corresponding base 23. A No. 2 limiting hole corresponding to the corresponding No. 2 limiting column 280 is opened on the slide plate 21, and the lower end of the No. 2 limiting column 280 slides through the corresponding base 23 and cooperates with the corresponding No. 2 limiting hole, and a driving component for driving the slide plate 21 to move is arranged on the fixed plate 20.

[0043] like Figure 2 and Figure 4 As shown, the driving assembly includes a shaft seat, and a screw rod 283 is rotatably mounted on the left end of the left vertical section of the fixed plate 20 through the shaft seat, and the screw rod 283 is threadedly connected to the slide plate 21.

[0044] During specific operation, the swing part 25 drives the square tube 252 to rotate, and the square tube 252 drives the friction block 24 to reciprocate through the slide bar 253. Since the No. 1 limit column 261 is inserted into the No. 1 limit hole, the slide bar 253 is restricted from sliding in the square tube 252, so that the friction block 24 can rotate in an arc with the slide bar 253 to push and bend the hardened film and press it against the arc surface of the base 23, and the arc surface of the friction block 24 rubs the hardened film under the support and resistance of the base 23. After rubbing for a certain period of time, the external motor installed on the fixed plate 20 drives the screw rod 283 to rotate, and the screw rod 283 drives the slide plate 21 to move forward, and the slide plate 21 drives the corresponding base 23 away from the corresponding hardened film, so that the base 23 does not support and resist the hardened film, and then the swing part 25 drives the friction block 24 to reciprocate again, so that the friction block 24 presses and rubs the hardened film without the support and resistance of the base 23.

[0045] After the arc surface of the friction block 24 rubs against the hardened film, the No. 1 connecting plate 262 is pulled to move upward, and the No. 1 connecting plate 262 drives the No. 1 limiting column 261 to disengage from the limiting hole, and at the same time stretches the No. 1 tension spring 263, and then the limiting plate 260 is rotated 180 degrees, so that the No. 1 limiting column 261 moves to the corresponding guide groove 270 position, and then the No. 1 connecting plate 262 is released, and the No. 1 connecting plate 262 is pulled to move toward the bottom plate 10 under the action of the No. 1 tension spring 263, so that the No. 1 limiting column 261 is inserted into the corresponding guide groove 270. At the same time, the friction block 24 will rotate with the limiting plate 260 so that its horizontal surface contacts the hardened film, and then the No. 2 connecting plate 281 is pulled upward, and the No. 2 connecting plate 281 drives the No. 2 limiting column 280 to disengage from the No. 2 limiting hole, and then the base 23 is rotated 180 degrees so that the horizontal surface of the base 23 faces the corresponding hardened film, and the external motor drives the screw rod 283 to rotate The square cylinder 252 and the slide bar 253 rotate to move the base 23 toward the corresponding hardened film until the horizontal surface of the base 23 fits with the hardened film, and then the square cylinder 252 and the slide bar 253 rotate. Since the slide bar 253 is not blocked by the No. 1 limit column 261, it can slide in the square cylinder 252. At the same time, the No. 1 limit column 261 slides in the corresponding guide groove 270 to limit the rotation of the friction block 24. As the square cylinder 252 and the slide bar 253 rotate, and the slide bar 253 slides in the square cylinder 252, the friction block 24 is pushed to move back and forth left and right, and with the support of the base 23, the hardened film is subjected to planar supported friction. After that, the external motor drives the base 23 away from the corresponding hardened film through the screw 283, and then the friction block 24 performs a planar unsupported friction test on the hardened film. After each friction mode is tested, it is necessary to observe whether the hardened film loses its transparency and whether there are scratches and damage.

[0046] like Figure 1 and Figure 6 As shown, the actuator 4 includes a spur gear 40, and the lower end of the rotating shaft 251 is rotated to penetrate the fixed plate 20 and then installed with the spur gear 40, and the lower end of the horizontal section of the fixed plate 20 is slidably installed with a rack 41 corresponding to the spur gear 40 one by one, and the rack 41 is meshed with the corresponding spur gear 40, and a connecting plate 42 is installed between two adjacent racks 41, and a slider 43 is installed at the front end of the rack 41 located at the front, and a push-pull component for reciprocatingly pushing and pulling the slider 43 is provided on the fixed plate 20.

[0047] like Figure 1 , Figure 2 and Figure 6 As shown, the push-pull assembly includes a stepper motor 44 , and the stepper motor 44 is installed on the upper end of the fixed plate 20 . The output shaft of the stepper motor 44 rotates and passes through the fixed plate 20 , and then a cam 45 is installed. A connecting rod 46 is hinged between the cam 45 and the slider 43 .

[0048] During specific operation, the stepper motor 44 drives the cam 45 to rotate, and the cam 45 pushes and pulls the slider 43 back and forth through the connecting rod 46. The slider 43 will drive the corresponding rack 41 to move during the reciprocating movement, and the other racks 41 will move synchronously through the connecting plate 42. During the movement of the rack 41, the spur gear 40 will be driven to reciprocate, and the spur gear 40 will drive the rotating shaft 251 to reciprocate. The rotating shaft 251 drives the corresponding friction block 24 to reciprocate through the square tube 252, the sliding rod 253 and the shaft column 250 to perform friction detection on the hardened film.

[0049] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0050] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sided PET hardened film strength testing device, comprising a bottom plate; characterized in that: Two support plates are symmetrically arranged at the upper end of the bottom plate, and a detection mechanism is arranged on the bottom plate and located between the two support plates; wherein: The detection mechanism comprises a fixed plate, the upper end of the bottom plate is provided with a fixed plate, and the fixed plate is in an inverted D-shaped structure, the upper end of the fixed plate is provided with a slide plate which is evenly slidably installed from front to back, the upper end of the slide plate is provided with a base which is rotatably installed through a roller shaft, the rear end surface of the base is an arc surface, and a friction block is provided on the rear side of the base, and the friction block is in a D-shaped structure; The support plate is provided with a fixing mechanism corresponding to the base one by one; The base plate is provided with a swinging part for driving the friction block to reciprocate for friction detection, the swinging part is provided with a conversion part for adjusting the horizontal surface and the arc surface of the friction block to sequentially fit the friction with the hardened film, the base plate is provided with a guide part, and the slide plate is provided with a limit part for limiting the rotation of the base and adjusting the position of the arc surface and horizontal surface of the base.

2. A double-sided PET hardened film strength testing device according to claim 1, characterized in that: The swinging part includes a shaft column, and the middle part of the lower end of the friction block is equipped with a shaft column. The upper end of the fixed plate is rotatably equipped with a rotating shaft corresponding to the base one by one, and the rotating shaft is concentric with the arc surface of the corresponding base. A square tube located above the fixed plate is rotatably equipped on the rotating shaft, and a sliding rod is slidably installed in the square tube. The front end of the sliding rod slides through the corresponding square tube and is rotatably connected to the corresponding shaft column. An actuator for driving the rotating shaft to rotate is arranged on the fixed plate.

3. A double-sided PET hardened film strength testing device according to claim 2, characterized in that: The actuator includes a spur gear, and the lower end of the rotating shaft is installed with a spur gear after rotating through the fixed plate. A rack corresponding to the spur gear is slidably installed at the lower end of the horizontal section of the fixed plate, and the rack is meshed with the corresponding spur gear. A connecting plate is installed between two adjacent racks, and a slider is installed at the front end of the rack located at the front, and a push-pull assembly for reciprocatingly pushing and pulling the slider is provided on the fixed plate.

4. A double-sided PET hardened film strength testing device according to claim 3, characterized in that: The push-pull assembly comprises a stepper motor, and the upper end of the fixed plate is provided with the stepper motor. The output shaft of the stepper motor rotates and passes through the fixed plate, and a cam is provided thereafter. A connecting rod is hinged between the cam and the slider.

5. A double-sided PET hardened film strength testing device according to claim 2, characterized in that: The conversion part includes a limit plate, a limit plate located above the corresponding square tube is fixedly mounted on the shaft column, two No. 1 limit columns are slidably mounted on the limit plate, a No. 1 connecting plate is commonly mounted on the upper ends of the two No. 1 limit columns on the same limit plate, a No. 1 tension spring is arranged between the No. 1 connecting plate and the corresponding limit plate, and a No. 1 limit hole cooperating with the corresponding two No. 1 limit columns is opened on the square tube and the sliding rod.

6. A double-sided PET hardened film strength testing device according to claim 1, characterized in that: The limiting part includes a No. 2 limiting column, and two No. 2 limiting columns are symmetrically arranged on the upper end of the base. A No. 2 connecting plate is commonly installed on the upper ends of the two limiting columns on the same base, and a No. 2 tension spring is installed between the No. 2 connecting plate and the corresponding base. The slide plate is provided with No. 2 limiting holes corresponding to the corresponding No. 2 limiting columns one by one. The upper end of the No. 2 limiting column slides through the corresponding base and then cooperates with the corresponding No. 2 limiting hole. A driving component for driving the slide plate to move is arranged on the fixed plate.

7. A double-sided PET hardened film strength testing device according to claim 5, characterized in that: The guide portion comprises a guide groove, and the upper end of the fixing plate is provided with a guide groove which corresponds one-to-one with the first limiting column and is located at the front side of the corresponding friction block.

8. The double-sided PET hardened film strength testing device according to claim 1, characterized in that: The fixing mechanism includes a T-shaped column. Two T-shaped columns symmetrically arranged on the back sides of the two support plates, a compression spring is installed between the vertical section of the T-shaped column and the corresponding support plate, and the horizontal sections of the two symmetrical T-shaped columns slide through the corresponding support plates and are jointly installed with a support plate. The support plate is an inverted L-shaped structure, and a clamping portion for clamping and fixing the end of the hardened film is arranged on the support plate.

9. A double-sided PET hardened film strength testing device according to claim 8, characterized in that: The clamping part includes a support plate, a support plate is fixedly installed on the side of the longitudinal section of the support plate away from the corresponding support plate, a cylinder is installed at the rear end of the support plate, and a pressure plate located on the rear side of the corresponding support plate is installed after the telescopic section of the cylinder slides through the transverse section of the corresponding support plate, and the pressure plate is slidably connected to the corresponding support plate.

10. The double-sided PET hardened film strength testing device according to claim 6, characterized in that: The driving assembly comprises an axle seat, and a screw rod is rotatably mounted on the left end of the left vertical section of the fixed plate through the axle seat, and the screw rod is threadedly connected to the slide plate.

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