Scientific instrument based on new material test

Abstract

The invention provides a scientific instrument based on new material testing, and relates to the field of new material testing. The scientific instrument based on the new material test comprises a shell, a support is fixedly installed on the shell, a wheel body used for rotation is rotatably installed in the shell, the wheel body and a rolling wheel cooperate to tighten a film material to be tested, a ratchet wheel is fixedly connected to one side of the wheel body, a pawl is rotatably installed on the shell, and a guide wheel is rotatably installed at one end of the pawl. According to the scientific instrument based on new material testing, full-mechanical manual driving is adopted, no electric control part exists, the instrument is compact in size and light in weight, temporary sampling inspection and incoming material verification are rapidly completed, and the problems that a traditional special instrument is large in size, needs an external power source and is poor in portability are solved; the synchronous visualization of the tension and the stretching distance in the stretching process is realized, the ratchet wheel and the pawl automatically lock data after the film is broken, and an additional measuring tool is not needed.

Description

Technical Field

[0001] This invention relates to the field of new material testing, specifically to a scientific instrument based on new material testing. Background Technology

[0002] In the production quality inspection of new material films (such as graphene films and polymer functional films), tensile properties (breaking force and elongation) are the core indicators for judging quality. Traditional testing relies on special clamp-type tensile instruments, which use hard clamps to hold the film and electric drive to complete the test. Not only are the equipment bulky and require an external power supply, making them extremely unportable, but they are also difficult to adapt to the needs of temporary spot checks in the production workshop and rapid on-site verification of incoming materials. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a scientific instrument based on new material testing, which solves the problems that not only are the devices bulky and require external power supplies, resulting in poor portability, but they are also difficult to adapt to the needs of temporary spot checks in production workshops and rapid on-site verification of incoming materials.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a scientific instrument based on new material testing, comprising a housing, a bracket fixedly installed on the housing, and a wheel rotatably installed inside the housing for rotation, the wheel and the roller working together to tighten the thin film material to be tested.

[0005] A ratchet is fixedly connected to one side of the wheel body, a pawl is rotatably mounted on the housing, and a guide wheel is rotatably mounted on one end of the pawl. The guide wheel rests on the film material to be tested, and the taut film material to be tested is used to support the guide wheel and disengage the pawl from the ratchet. The wheel body has a vortex-shaped groove inside, and a force-bearing rod is slidably installed inside the groove. A pointer is fixedly installed at the head of the force-bearing rod. A scale is fixedly installed at the end of the bracket near the force-bearing rod. A Z-shaped crank is rotatably connected inside the housing. One end of the crank is fixed to the wheel body. When the wheel body rotates, the pointer moves along the length of the scale with the force-bearing rod. The wheel body and the winding wheel work together to tighten the film. With manual drive by the crank, no external power supply is required, making it highly portable and suitable for temporary sampling inspections in production workshops and on-site verification of incoming materials. The ratchet and pawl cooperate with the guide wheel. When the film is tightened, the wheel body automatically unlocks and rotates. After breakage, the pawl locks the ratchet, making it easy to read data. The combination of the vortex-shaped groove, the force-bearing rod, the scale, and the pointer enables real-time visualization of the tensile force during the stretching process, simultaneously meeting the needs of fracture force measurement and solving the problems of large size and dependence on power supply of traditional equipment.

[0006] Preferably, the wheel body is provided with a groove, and a locking block is inserted into the groove. The locking block and the groove are used to clamp and fix the film material to be tested.

[0007] Preferably, the card block has a socket into which a detachable pin is inserted. The pin passes through the ratchet and is slidably connected to the ratchet.

[0008] Preferably, one end of the bracket is provided with a sliding groove, and the head of the force-bearing rod is slidably connected to the sliding groove.

[0009] Preferably, the roller includes two clamping rods, two connecting members, and two rotating shafts. The two clamping rods are used to clamp one end of the film material to be tested, the two clamping rods are fixed between the two connecting members, and the two rotating shafts are rotatably mounted on the bracket.

[0010] Preferably, the bracket is provided with a plurality of circumferentially arranged limiting holes, a limiting shaft is inserted into one of the limiting holes, and a limiting plate for sliding along a rotation axis close to it is fixedly connected to one end of the limiting shaft.

[0011] Preferably, the roller further includes two baffles, both of which are fixed to two clamping rods, and the distance between the two baffles on their adjacent sides is equal to the width of the film to be tested.

[0012] Preferably, the outer surface of the guide wheel is provided with an annular groove, the length of which is equal to the width of the film to be tested.

[0013] Preferably, the direction of movement of the force-bearing rod is consistent with the direction of tension of the material to be tested.

[0014] Preferably, the head of the force-bearing rod is fixedly connected to a hook.

[0015] Compared with existing technologies, this invention has the following advantages: It adopts a fully mechanical manual drive without any electronic control components. The instrument is compact and lightweight, and can be carried to the production workshop and incoming material warehouse to quickly complete temporary sampling inspections and incoming material verification. It solves the problems of traditional dedicated instruments being large, requiring external power supplies, and having poor portability. Through the coordinated cooperation of the vortex-shaped slot, scale, and pointer, it achieves synchronous visualization of tensile force and tensile distance during the stretching process. After the film breaks, the ratchet pawl automatically locks the data. No additional measuring tools are required. Two core indicators, breaking force and tensile rate, can be obtained in one test, which solves the limitation of traditional portable solutions that can only measure a single indicator and greatly improves the quality inspection efficiency on the production site. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention when the wheel and the winding wheel work together to tighten the film to be tested; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a sectional view of the front view of the housing and wheel body of the present invention; Figure 4 This is a sectional view of the side view of the housing and wheel body of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the structure of the housing of the present invention; Figure 7 This is a schematic diagram of the structure of the bracket of the present invention; Figure 8 This is a schematic diagram of the pawl and guide wheel of the present invention; Figure 9 This is a schematic diagram of the force-bearing rod of the present invention; Figure 10 This is a cross-sectional view of the clamping rod of the present invention; Figure 11 This is a schematic diagram of the wheel body of the present invention; Figure 12 This is a schematic diagram of the structure of the reel of the present invention; Figure 13 This is a schematic diagram of the rotating shaft and limiting plate of the present invention.

[0017] The components are as follows: 1. Housing; 2. Bracket; 3. Wheel; 4. Roller; 401. Clamping rod; 402. Connector; 403. Rotating shaft; 5. Ratchet; 6. Pawl; 7. Guide wheel; 8. Groove; 9. Force rod; 10. Pointer; 11. Scale; 12. Groove; 13. Locking block; 14. Pin; 15. Pinhole; 16. Needle; 17. Slide groove; 18. Limiting hole; 19. Limiting shaft; 20. Limiting plate; 21. Baffle; 22. Annular groove; 23. Hook. Detailed Implementation

[0018] like Figures 1-13As shown, a scientific instrument for testing new materials includes a housing 1, a support 2 fixedly mounted on the housing 1, and a rotating wheel 3 rotatably mounted inside the housing 1. One end of the thin film material to be tested is wound around a winding wheel 4 on the support 2. The wheel 3 and the winding wheel 4 work together to tighten the thin film material. A groove 12 is provided inside the wheel 3, and a locking block 13 is inserted into the groove 12. The locking block 13 and the groove 12 are used to clamp and fix the thin film material to be tested. The clamping structure of the locking block 13 and the groove 12 can form a uniform wrapping fixation of the film. Compared with traditional rigid clamps, this avoids edge damage to the film caused by local pressure concentration and also... To prevent the film from slipping during stretching and ensure stability during testing, the clamping block 13 has an insertion hole into which a detachable pin 14 is inserted. The pin 14 passes through the ratchet 5 and is slidably connected to the ratchet 5, which facilitates the disassembly of the clamping block 13 and improves the stability of the clamping block 13 within the groove 12. The groove 12 has a pinhole 15, and the clamping block 13 has a needle 16 that matches the pinhole 15. When the clamping block 13 is inserted into the groove 12, the needle 16 also penetrates the film and inserts into the pinhole 15. The cooperation between the needle 16 and the pinhole 15 ensures that the film is accurately positioned and penetrated and fixed during clamping, further enhancing clamping stability.

[0019] The winding wheel 4 includes two clamping rods 401, two connecting pieces 402, and two rotating shafts 403. The two clamping rods 401 are used to clamp one end of the film material to be tested. The two clamping rods 401 are fixed between the two connecting pieces 402. The two rotating shafts 403 are rotatably mounted on the bracket 2. One of the rotating shafts 403 is equipped with a handle. By rotating the handle, the film material to be tested is wound around the two connecting pieces 402. The clamping rods 401 and the connecting pieces 402 cooperate to quickly clamp one end of the film. The handle drives the rotating shaft 403 to rotate and wind the film around the two clamping rods 401. The film can be tightened without complicated operation, which is suitable for the needs of rapid testing without power supply on site. The bracket 2 is provided with several circumferentially arranged limiting holes 18. A limiting hole 18 is inserted into one of the limiting holes. Positioning shaft 19, one end of which is fixedly connected to a limiting plate 20 for sliding along a rotating shaft 403 close to it. The rotating shaft 403 has a limiting groove, and the limiting plate 20 can move along the limiting groove. The cooperation between the limiting shaft 19, the limiting hole 18, and the limiting plate 20 can lock the rotation state of the winding wheel 4, preventing the winding wheel 4 from loosening during the stretching process and causing film tension fluctuations, thus ensuring stable test conditions. The initial position of the winding wheel 4 can be adjusted by selecting different limiting holes 18 to adapt to the initial length requirements of films of different specifications. The winding wheel 4 also includes two baffles 21, both of which are fixed to two clamping rods 401. The distance between the sides of the two baffles 21 that are close to each other is equal to the width of the film to be tested. The two baffles 21 match the width of the film, limiting the film offset.

[0020] A ratchet 5 is fixedly connected to one side of the wheel body 3, and a pawl 6 is rotatably mounted on the housing 1. A guide wheel 7 is rotatably mounted on one end of the pawl 6. The guide wheel 7 rests on the film material to be tested. The taut film material to be tested supports the guide wheel 7 and disengages the pawl 6 from the ratchet 5. The outer surface of the guide wheel 7 is provided with an annular groove 22. The length of the annular groove 22 is equal to the width of the film to be tested. The annular groove 22 of the guide wheel 7 is adapted to the width of the film, so that the guide wheel 7 fits the film and further restricts the film offset.

[0021] The wheel body 3 has a vortex-shaped groove 8 inside, and a force-bearing rod 9 is slidably installed inside the vortex-shaped groove 8. A pointer 10 is fixedly installed at the head of the force-bearing rod 9. A scale 11 is fixedly installed at one end of the bracket 2 near the force-bearing rod 9. One end of the bracket 2 has a sliding groove 17, and the head of the force-bearing rod 9 is slidably connected to the sliding groove 17. The head of the force-bearing rod 9 is used to move linearly along the sliding groove 17. The sliding groove 17 provides guidance for the force-bearing rod 9, ensuring that the force-bearing rod 9 drives the pointer 10 to move linearly along the scale 11, and preventing the force-bearing rod 9 from deviating from the guide. To reduce tensile force measurement deviation, the moving direction of the force rod 9 is aligned with the tensile direction of the material under test, ensuring that the tensile force on the film is directly and without loss transmitted to the force rod 9. This guarantees that the tensile force value displayed by the pointer 10 matches the actual force on the film, reducing measurement errors caused by force transmission deviation and improving the accuracy of the fracture force test. A hook 23 is fixedly connected to the head of the force rod 9. The hook 23 is used to connect to an external tensile tester before testing the film material. One end of the tensile tester is fixed, and the other end is connected to the hook 23. By rotating the handle, the force rod 9 is moved. The pointer 10 moves, pre-testing the tension represented by each mark on the scale 11 that the pointer 10 points to. This test only needs to be performed once and can be repeated subsequently. In subsequent tests, the mark that the pointer 10 points to not only represents the tension required for the film to break, but also the distance the film stretches from a taut state to breakage. A Z-shaped rocker handle is rotatably connected inside the housing 1. One end of the rocker handle is fixed to the wheel 3. When the wheel 3 rotates, the pointer 10 moves along the length of the scale 11 with the force rod 9, passing through the wheel... The film is stretched in conjunction with the roller 4 and driven manually with a crank handle. It requires no external power supply, making it highly portable and suitable for temporary spot checks in production workshops and on-site verification of incoming materials. The ratchet 5 and pawl 6 work together with the guide wheel 7. When the film is stretched, the wheel 3 is automatically unlocked to rotate. After breakage, the pawl 6 locks the ratchet 5 into a locked state, which is convenient for reading data. The combination of the vortex-shaped slot 8, the force rod 9, the scale 11, and the pointer 10 realizes real-time visualization of the tensile force during the stretching process, and simultaneously meets the requirements for fracture force measurement, solving the problems of large size and dependence on power supply of traditional equipment.

[0022] It should be noted that the wheel 3 rotates, while the force rod 9 needs to move in a straight line to drive the pointer 10 to read the scale 11. The vortex-shaped groove 8 directly converts the rotational motion of the wheel 3 into the linear motion of the force rod 9 through its own gradually changing spiral profile, eliminating the need for complex transmission structures such as additional gears and lead screws. The vortex-shaped groove 8 is integrated inside the wheel 3, without occupying additional external space of the instrument. Compared with the transmission structure of external connecting rods and cams, it greatly reduces the size of the instrument, meeting the needs of portable testing in production sites. At the same time, the sliding contact between the groove 8 and the force rod 9 is a surface contact, with low force transmission loss, which can efficiently convert the rotational force of the wheel 3 into the tensile force of the membrane, reducing mechanical errors. It works in synergy with the ratchet 5, pawl 6, and scale 11. When the wheel 3 rotates, the vortex-shaped groove 8 pushes the force rod 9 to move in a straight line, synchronously driving the pointer 10 to read the value. After the membrane breaks, the pawl 6 locks the ratchet 5 and locks the wheel 3. At this time, the position of the force rod 9 is fixed, and the pointer 10 can stably display the maximum tensile value.

[0023] It should be noted that traditional clamping for linear stretching relies on rigid clamping and pulling. Point or line contact between the clamp and the film can cause localized pressure concentration, which can easily lead to edge tearing or premature breakage of ultra-thin, low-strength films, resulting in distorted test data. In contrast, the winding action of wheel 3 in this instrument replaces rigid clamping with "wrap-around fixation." The film is wrapped around wheel 3 and winding wheel 4, with surface contact, and the force is evenly distributed along the width of the film, without localized high-pressure areas. Combined with the penetrating positioning of the clamp block 13 and needle 16, it avoids slippage and clamp damage, ensuring that the film is only subjected to tensile force. The fracture under action allows the test data to truly reflect the material's performance. Traditional linear stretching fixtures require long-stroke guide rails (to meet the film stretching distance requirements), resulting in bulky and heavy instruments that cannot meet the need for portability on the production site. The winding action of wheel 3 converts the linear stretching stroke into the number of rotations of wheel 3: the stretching distance is determined by the circumference of wheel 3 and the number of rotations, so sufficient stretching stroke can be achieved through multiple rotations. The rotating structure can be integrated into the housing 1, eliminating the need for additional long guide rails, which greatly reduces the overall size of the instrument and makes it suitable for portable needs such as temporary spot checks in the workshop and on-site verification of incoming materials.

[0024] When using, such as Figure 1 and Figure 3As shown, one end of the film to be tested is placed into the groove 12 of the wheel body 3. After the locking block 13 is inserted into the groove 12, the position of the locking block 13 is locked by the pin 14 passing through the ratchet 5. The needle 16 on the locking block 13 penetrates the film and inserts into the needle hole 15 of the groove 12, realizing the through-fixation of one end of the film. The other end of the film is clamped between the two clamping rods 401 of the winding wheel 4. The two baffles 21 of the winding wheel 4 match the width of the film. The annular groove 22 of the guide wheel 7 fits against the surface of the film, which together restricts the lateral displacement of the film and ensures that the stretching direction is consistent along the axis. The handle of the winding wheel 4 is rotated. The rotating shaft 403 and the connecting piece 402 rotate, winding the film around the clamping rod 401, gradually tightening the film. According to the initial length requirement of the film, the corresponding limiting hole 18 on the bracket 2 is inserted into the limiting shaft 19. The limiting shaft 19 drives the limiting plate 20 to move along the limiting groove of the rotating shaft 403, locking the rotation state of the winding wheel 4 to prevent loosening during the stretching process. After the film is tightened, its surface support guide wheel 7 is lifted upward, driving the pawl 6 to rotate around the housing 1 and disengage from the ratchet 5, unlocking the rotation restriction of the wheel body 3. At this time, the instrument is in the state of waiting to be stretched.

[0025] Next, the Z-shaped crank is rotated, driving the wheel 3 to rotate slowly. The vortex-shaped groove 8 inside the wheel 3 rotates with the wheel 3. Through the sliding engagement between the inner wall of the groove 8 and the force rod 9, the rotational motion is converted into the linear motion of the force rod 9 (the force rod 9 moves directionally along the slide groove 17 of the support 2, and the direction of movement is consistent with the direction of film stretching). The pointer 10 at the head of the force rod 9 slides synchronously along the scale 11, providing real-time feedback on the tension. At the same time, the film is continuously stretched during the rotation of the wheel 3. The scale of the scale 11 synchronously reflects the stretching distance of the film from the taut state to the current position. When the tension on the film reaches the breaking threshold, the film breaks instantly. The guide wheel 7 loses the support of the film and moves downward under its own gravity, driving the pawl 6 to reset and engage in the tooth groove of the ratchet 5, locking the position of the wheel 3 and the force rod 9. At this time, the scale on the scale 11 where the pointer 10 stops corresponds to the film. The maximum tensile force at break (pre-calibrated by connecting an external tensile gauge via hook 23; one calibration allows for repeated use) is measured. The maximum tensile amount of the film is determined by the difference between the initial tension position and the locked position. The instrument is fully mechanically driven, without any electronic components. Its compact size and lightweight design allow for easy portability to production workshops and incoming material warehouses, enabling rapid temporary sampling and incoming material verification. This solves the problems of traditional dedicated instruments being bulky, requiring external power supplies, and lacking portability. Through the coordinated operation of the vortex-shaped slot 8, scale 11, and pointer 10, the tensile force and stretching distance are simultaneously visualized during the stretching process. After the film breaks, the ratchet 5 and pawl 6 automatically lock the data. No additional measuring tools are needed; a single test can obtain both the breaking force and the elongation rate, overcoming the limitation of traditional portable solutions that can only measure a single indicator, significantly improving the quality inspection efficiency on the production floor.

[0026] It should be noted that before testing, the fixed end of the standard tensile tester should be bolted to the instrument housing 1 or the external reference plane to ensure that the tensile tester is fixed without displacement or shaking. Connect the force hook of the tensile tester to the pull hook 23 at the head of the force rod 9 of the instrument (it can be fixed with buckles or bolts to prevent it from falling off during the stretching process). Adjust the height and angle of the tensile tester so that the force direction of the tensile tester is completely aligned with the sliding direction of the force rod 9 (along the straight line of the slide groove 17) and consistent with the subsequent film stretching direction to avoid calibration errors caused by lateral force components. Then rotate Z at a uniform speed. A U-shaped crank drives the wheel 3 to rotate within the housing 1. The vortex-shaped groove 8 inside the wheel 3 rotates synchronously with the wheel 3. The inner wall of the groove 8 slides in contact with the circular end of the force-bearing rod 9. Through the gradual thrust of the vortex-shaped profile, the rotational motion of the wheel 3 is converted into the linear motion of the force-bearing rod 9 along the slide groove 17 (the force-bearing rod 9 only moves along the length of the scale 11 without offset). During the movement of the force-bearing rod 9, the pointer 10 at its head slides uniformly along the scale 11, synchronously reading and recording the current scale value (denoted as L, unit: mm) pointed to by the pointer 10. Simultaneously, the real-time display value (denoted as F, unit: N) of the standard tension gauge is read, ensuring that each scale value corresponds to a unique tension value. The recording interval can be set according to accuracy requirements (e.g., recording a set of data every 0.5 mm, or ... (Record the force change point); continuously rotate the crank at a constant speed until the force rod 9 moves to the maximum range scale of the ruler 11, completing the recording of the force value and scale correspondence across the entire range; if the force rod 9 gets stuck, the pointer 10 jumps, or the tension gauge reading is abnormal during the calibration process, the calibration must be stopped, and the vortex groove 8 and slide groove 17 must be checked for impurities or wear. After troubleshooting, recalibrate; after completing the forward calibration, rotate the crank in the reverse direction to gradually reset the force rod 9 to the 0 scale, and simultaneously record the tension gauge readings corresponding to each scale during the reset process to verify the consistency of the forward and reverse calibration data (the deviation must be ≤0.1N); take the average of multiple recorded values ​​for the same scale to eliminate speed fluctuations from manually rotating the crank and random errors from tension gauge response delay; finally, organize all recorded data to form a calibration table of scale L and tension value F for the ruler 11 (e.g., L=0mm, F=0N; L=2mm, F=1.5N; L=5mm, F=4.2N); Since the linear movement distance of the force rod 9 is directly equivalent to the scale of the ruler 11 (the scale interval of the ruler 11 is a fixed physical length, such as 1mm / division), the scale value L pointed to by the pointer 10 is the stretching distance of the film from the taut state (initial 0 scale) to the current position (no additional conversion is required). For example, when the film is taut, the pointer 10 is at L0=1mm (initial taut position), and when it breaks, the pointer 10 is locked at L1=6mm. Then the stretching distance ΔL=L1-L0=5mm. Combined with the initial length, the stretching rate can be calculated. By connecting a standard tension gauge to the hook 23, a fixed correspondence between the physical scale of the ruler 11 and the actual tension value and stretching distance is established, realizing "single scale double reading" (breaking force and stretching distance) in subsequent tests. No recalibration is required, and only one calibration is needed for long-term use.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A scientific instrument for testing new materials, characterized in that: Includes a housing (1), on which a bracket (2) is fixedly installed, and a wheel (3) for rotation is rotatably installed on the housing (1). The wheel (3) and the roller (4) work together to stretch the film material to be tested. A ratchet (5) is fixedly connected to one side of the wheel body (3), a pawl (6) is rotatably mounted on the housing (1), a guide wheel (7) is rotatably mounted on one end of the pawl (6), the guide wheel (7) rests on the film material to be tested, the taut film material to be tested is used to support the guide wheel (7) and to disengage the pawl (6) from the ratchet (5); The wheel body (3) has a vortex-shaped groove (8) inside, and a force rod (9) is slidably installed inside the vortex-shaped groove (8). A pointer (10) is fixedly installed at the head of the force rod (9) relative to it. A scale (11) is fixedly installed at one end of the bracket (2). When the wheel body (3) rotates, the pointer (10) moves along the length direction of the scale (11) with the force rod (9).

2. The scientific instrument based on new material testing according to claim 1, characterized in that: The wheel body (3) has a groove (12) inside, and a locking block (13) is inserted into the groove (12). The locking block (13) and the groove (12) are used to clamp and fix the film material to be tested.

3. The scientific instrument based on new material testing according to claim 2, characterized in that: The card block (13) has a socket, into which a pin (14) is inserted. The pin (14) passes through the ratchet (5) and is slidably connected to the ratchet (5).

4. The scientific instrument based on new material testing according to claim 1, characterized in that: One end of the bracket (2) is provided with a sliding groove (17), and the head of the force rod (9) is slidably connected to the sliding groove (17).

5. A scientific instrument for testing new materials according to claim 1, characterized in that: The reel (4) includes two clamping rods (401), two connecting pieces (402), and two rotating shafts (403). The two clamping rods (401) are used to clamp one end of the film material to be tested. The two clamping rods (401) are fixed between the two connecting pieces (402), and the two rotating shafts (403) are rotatably mounted on the bracket (2).

6. A scientific instrument for testing new materials according to claim 5, characterized in that: The bracket (2) is provided with a number of circumferentially arranged limiting holes (18), and a limiting shaft (19) is inserted into one of the limiting holes (18). One end of the limiting shaft (19) is fixedly connected to a limiting plate (20) for sliding along the rotating shaft (403) close to it.

7. A scientific instrument based on new material testing according to claim 5, characterized in that: The reel (4) also includes two baffles (21), both baffles (21) are fixed to two clamping rods (401), and the distance between the two baffles (21) on their adjacent sides is equal to the width of the film to be tested.

8. A scientific instrument for testing new materials according to claim 1, characterized in that: The outer surface of the guide wheel (7) is provided with an annular groove (22), the length of which is equal to the width of the film to be tested.

9. A scientific instrument for testing new materials according to claim 1, characterized in that: The direction of movement of the force-bearing rod (9) is consistent with the direction of tension of the material to be tested.

10. A scientific instrument for testing new materials according to claim 1, characterized in that: The head of the force-bearing rod (9) is fixedly connected to a hook (23).

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