An antibacterial film tensile tester

Abstract

The application is suitable for the technical field of film tensile test, and provides an antibacterial film tensile tester, which comprises an instrument rack, a test platform, a vertical tensile test mechanism and a reciprocating bending test mechanism. The vertical tensile test mechanism is composed of a vertical driving mechanism, a lifting platform and an up-down clamping mechanism. The reciprocating bending test mechanism is composed of a reciprocating swing mechanism and a bending compression roller. The reciprocating swing mechanism is composed of a linkage assembly, a fixing seat, a swing assembly, a swing shaft and a bending meter assembly. The vertical tensile test mechanism and the reciprocating bending test mechanism are linked and matched, can truly simulate the combined stress state of stretching and bending of the antibacterial film in actual use, make the sample synchronously bear the reciprocating bending load in the process of continuous axial stretching, realize the synchronous combined loading of axial stretching and reciprocating bending, and the test result directly reflects the fatigue resistance and fracture characteristics of the film in the real use state, and the matching degree of the quality inspection data and the actual use performance is significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of thin film tensile testing technology, and particularly relates to an antibacterial thin film tensile testing instrument. Background Technology

[0002] Antibacterial films are functional flexible film materials prepared by introducing antibacterial components into polymer substrates such as polyethylene, polypropylene, polyvinyl chloride, or medical polyurethane. They can effectively inhibit the growth of bacteria on the contact surface and are widely used in many fields such as food contact packaging, medical wound dressings, disposable hygiene protective products, and antibacterial interior decoration of home appliances. Before large-scale production, antibacterial films need to undergo tensile testing to determine whether they meet production quality requirements.

[0003] Existing antibacterial film tensile testing instruments consist of a frame, a vertical drive mechanism, a lifting platform, upper and lower clamps, and a tensile testing unit. The film sample is clamped and fixed at its upper and lower ends to the clamps. The vertical drive mechanism drives the lifting platform to rise at a constant speed, applying a continuous axial tensile load to the sample. The tensile testing unit collects data and calculates the film's tensile strength and elongation at break, among other basic mechanical parameters. Alternatively, an independent motor drives a bending mechanism to reciprocate, applying a reciprocating bending load to a fixed film sample to test its bending fatigue life. However, existing testing instruments still have certain limitations in practical applications.

[0004] Firstly, existing testing instruments can only complete single axial tension or single reciprocating bending tests, which cannot simulate the combined stress state of tension and bending acting simultaneously in the actual service of antibacterial films. The strength and elongation data obtained by uniaxial tension alone cannot reflect the true fracture characteristics and fatigue resistance of the film under combined loads, resulting in a low degree of matching between quality inspection data and the actual performance of the product.

[0005] Secondly, even if existing testing instruments want to achieve synchronous tension and bending, they still need two independent drive systems to control the tension and bending actions respectively, relying on electronic control programs to achieve timing coordination. This not only results in complex equipment structure and high manufacturing costs, but also suffers from insufficient synchronous stability of tension and bending actions due to factors such as signal delay, parameter fluctuations, or load changes. The composite loading conditions deviate significantly from the actual stress state.

[0006] Therefore, in view of the above situation, there is an urgent need to develop an antibacterial film tensile tester to overcome the shortcomings in current practical applications. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an antibacterial film tensile tester to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] An antibacterial film tensile testing instrument includes an instrument frame, on which horizontally placed testing platforms are respectively provided, and further includes:

[0010] A vertical tensile testing mechanism is provided, comprising a vertical drive mechanism, a lifting platform, and upper and lower clamping mechanisms. The vertical drive mechanism is mounted on an instrument frame, and the lifting platform is located directly above the testing platform. The lifting platform is connected to the power output end of the vertical drive mechanism. The upper and lower clamping mechanisms are respectively mounted on the lifting platform and the testing platform and are used to clamp and fix the upper and lower ends of the vertically positioned film sample. A mechanical tensile gauge is provided inside the upper and lower clamping mechanisms.

[0011] A reciprocating bending test mechanism is provided, comprising a reciprocating swing mechanism and a bending pressure roller. The bending pressure roller is disposed on one side of the upper and lower clamping mechanism and located on the sample tension path of the upper and lower clamping mechanism. The reciprocating swing mechanism comprises a linkage component, a fixed base, a swing component, a swing shaft, and a bending counting component. The linkage component is mounted on one side of the instrument frame, and its power input end is drivenly connected to the power output end of the vertical drive mechanism. The fixed base is fixed to the side wall of the instrument frame. The swing component is rotatably mounted on the fixed base. One end of the swing component is drivenly connected to the power output end of the linkage component, and the other end of the swing component is fixed with a swing shaft. The swing shaft is coaxially fixed to the bending pressure roller, and both the swing shaft and the bending pressure roller are parallel to the width direction of the film sample. One end of the bending counting component is rotatably mounted on one side of the fixed base, and the other end of the bending counting component is coaxially mounted on the swing shaft.

[0012] As a further technical solution of the present invention, the linkage assembly includes a worm, a worm wheel, a linkage shaft, a second transmission component, and a rotating shaft. The worm is coaxially disposed at the power output end of the vertical drive mechanism. A worm wheel meshes with one side of the worm. The worm wheel is coaxially mounted on the linkage shaft. The linkage shaft is rotatably mounted on one side of the instrument frame. The end of the linkage shaft is connected to one end of the rotating shaft via the second transmission component. The rotating shaft is rotatably mounted on a fixed base and parallel to the linkage shaft. A swing component is coaxially fixed to one end of the rotating shaft.

[0013] As a further technical solution of the present invention, the swing assembly includes an eccentric cam, a reciprocating slide column, a lifting seat, a reciprocating spring, a lever, a swing arm, and a U-shaped rod. The eccentric cam is eccentrically fixed on a rotating shaft. A reciprocating slide column is provided above the eccentric cam and slides vertically with the fixed seat. The bottom of the reciprocating slide column is fixed with a lifting seat that abuts against the outer edge of the eccentric cam. A reciprocating spring is sleeved on the outer side of the reciprocating slide column. The two ends of the reciprocating spring abut against the bottom of the lifting seat and the fixed seat, respectively. A lever is horizontally fixed at the top of the reciprocating slide column. The lever slides and drives a U-shaped rod fixed on one side of the swing arm. One end of the swing arm is rotatably mounted on one side of the fixed seat, and the other end of the swing arm is fixed with a swing shaft.

[0014] As a further technical solution of the present invention, the bending counting assembly includes a ratchet, a counting dial, scale lines, a pawl, and a torsion spring. The ratchet is rotatably mounted on a fixed base and coaxially arranged with the hinged rotating end of the swing arm. A counting dial is coaxially fixed to one side of the ratchet. Scale lines are circumferentially equidistantly opened on the outer edge end face of the counting dial. A pawl is engaged on one side of the ratchet. The pawl is rotatably mounted on the swing shaft. One side of the pawl is connected to the outer wall of the swing shaft through a torsion spring.

[0015] As a further technical solution of the present invention, scale rods are symmetrically arranged on both sides of the fixed base. The extension direction of the scale rod is parallel to the outer edge contour of the counting dial. A scale window is opened on the scale rod at the reference reading position corresponding to the scale line. A counting camera is arranged at the scale window, and the acquisition end of the counting camera is aligned with the scale line area inside the scale window.

[0016] As a further technical solution of the present invention, the vertical drive mechanism includes a vertical guide column, a transmission screw, a transmission seat, a drive motor, and a transmission component. The transmission screw is vertically rotatably mounted on the instrument frame. Vertical guide columns fixed on the instrument frame are symmetrically arranged on both sides of the transmission screw. The vertical guide columns are vertically slidably connected to the lifting platform. The transmission screw is threadedly driven by the transmission seat fixed on the lifting platform. A worm gear is coaxially fixed to the outer wall of the transmission screw. One end of the transmission screw is driven by the output end of the drive motor fixed in the instrument frame through the transmission component.

[0017] As a further technical solution of the present invention, the upper and lower clamping mechanism includes an adjustment component and a clamping component. The adjustment component is respectively installed on the lifting platform and the test platform, and six sets of clamping components are symmetrically arranged in the upper and lower parts of the adjustment component.

[0018] As a further technical solution of the present invention, the adjustment assembly includes a main clamping seat, a side clamping seat, a lateral telescopic kit, a vertical telescopic kit, and a locking telescopic kit. The main clamping seat is symmetrically installed in the middle of the lifting platform and the test platform. Two side clamping seats are symmetrically arranged on both sides of the main clamping seat. The main clamping seat and the side clamping seats at the same horizontal height are connected by the lateral telescopic kit. The two side clamping seats located on the same side of the main clamping seat are connected by the vertical telescopic kit. A locking telescopic kit is installed between the main clamping seat and the side clamping seats on the test platform. Clamping assemblies are installed on both the main clamping seat and the side clamping seats.

[0019] As a further technical solution of the present invention, the clamping assembly includes a clamping block, a guide rod, a return spring, and an adjusting bolt. The clamping block is symmetrically arranged on the main clamping seat and the side clamping seat. A guide rod is fixed to the outside of the clamping block. The guide rod is horizontally slidably installed on the main clamping seat and the side clamping seat. A return spring is sleeved on the outside of the guide rod. The two ends of the return spring abut against the end of the guide rod and the outer wall of the clamping seat, respectively. The adjusting bolt is threaded onto the main clamping seat and the side clamping seat. The end of the adjusting bolt abuts against the outer wall of the clamping block.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] After the upper and lower clamping mechanisms clamp and fix the upper and lower ends of the film sample, the vertical drive mechanism can simultaneously drive the lifting platform and the linkage component to work. The lifting platform moves vertically away from the test platform and, in conjunction with the upper and lower clamping mechanisms, applies a continuous vertical tensile force to the film sample to complete the vertical tensile test. The mechanical tensile gauge provides real-time feedback on the current tensile force value. After the film sample breaks, the maximum tensile force value during the test is automatically stored and displayed. The linkage component transmits the rotational torque to the swing component, which drives the swing shaft to swing back and forth. The swing shaft drives the bending pressure roller to swing back and forth, continuously applying an alternating bending load to the film sample in the tensile state to complete the synchronous bending test. During the swinging process, the swing shaft can drive the bending counting component, which automatically counts the number of swinging cycles of the swing shaft and the bending pressure roller.

[0022] As the stretching stroke increases, the elongation and bending cycle count of the film sample accumulate simultaneously, which can realistically simulate the combined stress state of the antibacterial film under the combined action of stretching and bending in actual use. This allows the film sample to simultaneously bear reciprocating bending loads during continuous axial stretching, achieving synchronous combined loading of axial stretching and reciprocating bending. The test results can directly reflect the fatigue resistance and fracture characteristics of the film under actual use conditions, significantly improving the matching degree between quality inspection data and actual use performance.

[0023] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a front view of the structure of the antibacterial film tensile tester provided in an embodiment of the present invention.

[0025] Figure 2 This is a first-view structural schematic diagram of the antibacterial film tensile testing instrument provided in an embodiment of the present invention.

[0026] Figure 3 This is a structural schematic diagram of the antibacterial film tensile tester provided in an embodiment of the present invention from a second perspective.

[0027] Figure 4 This is a third-view structural schematic diagram of the antibacterial film tensile testing instrument provided in an embodiment of the present invention.

[0028] Figure 5 for Figure 2 A schematic diagram of the structure of the adjustment component and the clamping component.

[0029] Figure 6 for Figure 5 Enlarged view of the structure of a single clamping component.

[0030] Figure 7 for Figure 2 A schematic diagram of the reciprocating oscillating mechanism and the bending pressure roller.

[0031] Figure 8 for Figure 7 A side view of the reciprocating swing mechanism.

[0032] Figure 9 for Figure 8 A schematic diagram of the structure of the swing component and the bending counting component.

[0033] Figure 10 for Figure 9 A structural side view of the swing component and the bending counting component.

[0034] Reference numerals: 100-Instrument rack, 110-Test platform, 200-Vertical drive mechanism, 210-Vertical guide column, 220-Transmission screw, 230-Transmission seat, 240-Drive motor, 250-Transmission component one, 300-Lifting platform, 400-Upper and lower clamping mechanism, 410-Adjustment assembly, 411-Main clamping seat, 412-Side clamping seat, 413-Horizontal telescopic assembly, 414-Vertical telescopic assembly, 415-Locking telescopic assembly, 420-Clamping assembly, 421-Clamping block, 422-Guide rod, 423-Reset spring, 424-Adjusting bolt, 500-Reciprocating pendulum Drive mechanism, 510-Linkage assembly, 511-Worm gear, 512-Worm wheel, 513-Linkage shaft, 514-Transmission component two, 515-Rotation shaft, 520-Fixed seat, 521-Scale rod, 522-Scale window, 530-Oscillating assembly, 531-Eccentric cam, 532-Reciprocating slide column, 533-Lifting seat, 534-Reciprocating spring, 535-Tuning lever, 536-Swing rod, 537-U-shaped rod, 540-Swing shaft, 550-Bending counting assembly, 551-Ratchet, 552-Counting dial, 553-Scale line, 554-Pawl, 555-Torsion spring, 600-Bending pressure roller. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0037] like Figures 1 to 10 As shown, an antibacterial film tensile testing instrument provided as an embodiment of the present invention includes an instrument frame 100, on which horizontally placed testing platforms 110 are respectively provided, and further includes:

[0038] A vertical tensile testing mechanism is provided, comprising a vertical drive mechanism 200, a lifting platform 300, and an upper and lower clamping mechanism 400. The vertical drive mechanism 200 is mounted on an instrument frame 100, and the lifting platform 300 is located directly above the testing platform 110. The lifting platform 300 is connected to the power output end of the vertical drive mechanism 200. The upper and lower clamping mechanisms 400 are respectively mounted on the lifting platform 300 and the testing platform 110 and are used to clamp and fix the upper and lower ends of the vertically set film sample. The upper and lower clamping mechanisms 400 are equipped with a mechanical tensile gauge for automatically recording the maximum tensile force value during the vertical tensile test of the film sample.

[0039] A reciprocating bending test mechanism is provided, comprising a reciprocating swing mechanism 500 and a bending pressure roller 600. The bending pressure roller 600 is disposed on one side of the upper and lower clamping mechanism 400 and located on the sample tension path of the upper and lower clamping mechanism 400. The reciprocating swing mechanism 500 comprises a linkage component 510, a fixed base 520, a swing component 530, a swing shaft 540, and a bending counting component 550. The linkage component 510 is mounted on one side of the instrument frame 100, and its power input end is connected to the power output end of the vertical drive mechanism 200. The fixed base 520... The oscillating component 530 is rotatably mounted on the fixed base 520. One end of the oscillating component 530 is connected to the power output end of the linkage component 510. The other end of the oscillating component 530 is fixed with a swing shaft 540. The swing shaft 540 is coaxially fixed to the bending pressure roller 600. Both the swing shaft 540 and the bending pressure roller 600 are parallel to the width direction of the film sample. One end of the bending counting component 550 is rotatably mounted on one side of the fixed base 520. The other end of the bending counting component 550 is coaxially mounted on the swing shaft 540.

[0040] After the upper and lower clamping mechanisms 400 clamp and fix the upper and lower ends of the film sample, the vertical drive mechanism 200 can simultaneously drive the lifting platform 300 and the linkage component 510 to work. The lifting platform 300 moves vertically away from the test platform 110 and, in conjunction with the upper and lower clamping mechanisms 400, applies a continuous vertical tensile force to the film sample to complete the vertical tensile test. The mechanical tensile gauge provides real-time feedback on the current tensile force value. After the film sample breaks, the maximum tensile force value during the test is automatically stored and displayed. The linkage component 510 transmits the rotational torque to the swing component 530. The swing component 530 can drive the swing shaft 540 to swing back and forth. The swing shaft 540 drives the bending pressure roller 600 to swing back and forth, continuously applying an alternating bending load to the film sample in a tensile state to complete the synchronous bending test. During the back-and-forth swinging process, the swing shaft 540 can drive the bending counting component 550. The bending counting component 550 automatically counts the number of back-and-forth swing cycles of the swing shaft 540 and the bending pressure roller 600.

[0041] As the stretching stroke increases, the elongation and bending cycle count of the film sample accumulate simultaneously, which can realistically simulate the combined stress state of the antibacterial film under the combined action of stretching and bending in actual use. This allows the film sample to simultaneously bear reciprocating bending loads during continuous axial stretching, achieving synchronous combined loading of axial stretching and reciprocating bending. The test results can directly reflect the fatigue resistance and fracture characteristics of the film under actual use conditions, significantly improving the matching degree between quality inspection data and actual use performance.

[0042] In a preferred embodiment, the bending roller 600 is interchangeable and its swing amplitude is adjustable, which can adapt to test standards with different bending radii and different deformation amounts, and is compatible with test specifications for multiple types of film samples, thus having a wide range of applications.

[0043] like Figures 2 to 10 As shown, in a preferred embodiment of the present invention, the linkage component 510 includes a worm 511, a worm wheel 512, a linkage shaft 513, a transmission component 514, and a rotating shaft 515. The worm 511 is coaxially disposed at the power output end of the vertical drive mechanism 200. The worm wheel 512 is meshed on one side of the worm 511. The worm wheel 512 is coaxially mounted on the linkage shaft 513. The linkage shaft 513 is rotatably mounted on one side of the instrument frame 100. The end of the linkage shaft 513 is connected to one end of the rotating shaft 515 through the transmission component 514. The rotating shaft 515 is rotatably mounted on the fixed base 520 and parallel to the linkage shaft 513. A swing component 530 is coaxially fixed to one end of the rotating shaft 515.

[0044] The vertical drive mechanism 200 can drive the worm gear 511 to rotate synchronously. The worm gear 511 drives the linkage shaft 513 to rotate via the worm wheel 512. The linkage shaft 513 drives the rotating shaft 515 to rotate via the transmission component 514. The rotating shaft 515 drives the swing assembly 530 to convert the continuous rotary motion into the reciprocating swing of the swing shaft 540. The swing shaft 540 drives the bending pressure roller 600 to swing back and forth, continuously applying alternating bending loads to the film sample in a tensile state, completing the synchronous bending test. Furthermore, during the reciprocating swing, the swing shaft 540 can drive the bending counting assembly 550, which counts the bending... The counting component 550 automatically counts the number of reciprocating oscillation cycles of the swing shaft 540 and the bending pressure roller 600. As the stretching stroke increases, the elongation and bending cycle count of the film sample accumulate synchronously, which can realistically simulate the combined stress state of the antibacterial film under the simultaneous action of stretching and bending in actual use. This allows the film sample to simultaneously bear the reciprocating bending load during continuous axial stretching, achieving synchronous composite loading of axial stretching and reciprocating bending. The test results can directly reflect the fatigue resistance and fracture characteristics of the film under actual use conditions, significantly improving the matching degree between quality inspection data and actual use performance.

[0045] In a preferred embodiment, the transmission component 514 preferably adopts a belt drive structure consisting of a synchronous belt and a synchronous pulley.

[0046] like Figures 2 to 10As shown, in a preferred embodiment of the present invention, the swing assembly 530 includes an eccentric cam 531, a reciprocating slide column 532, a lifting seat 533, a reciprocating spring 534, a lever 535, a swing rod 536, and a U-shaped rod 537. The eccentric cam 531 is eccentrically fixed on the rotating shaft 515. The upper part of the eccentric cam 531 is provided with a reciprocating slide column 532 that slides vertically with the fixed seat 520. The bottom of the reciprocating slide column 532 is fixed with a part that abuts against the outer edge of the eccentric cam 531. The lifting seat 533 has a reciprocating spring 534 sleeved on the outside of the reciprocating slide column 532. The two ends of the reciprocating spring 534 abut against the bottom of the lifting seat 533 and the fixed seat 520 respectively. The top of the reciprocating slide column 532 is horizontally fixed with a lever 535. The lever 535 is in sliding transmission cooperation with a U-shaped rod 537 fixed on one side of the swing rod 536. One end of the swing rod 536 is rotatably installed on one side of the fixed seat 520, and the other end of the swing rod 536 is fixed with a swing shaft 540.

[0047] The rotating shaft 515 of the linkage component 510 outputs continuous uniform rotational motion, driving the eccentric cam 531 to rotate eccentrically around the axis of the rotating shaft 515. During the rotation of the eccentric cam 531, the radial lift of its outer edge profile continuously changes: in the lift-increasing phase, the outer edge pushes the lifting seat 533 to overcome the preload of the reciprocating spring 534 and move upward, driving the reciprocating slide column 532 to move smoothly upward; in the lift-out phase, the reciprocating spring 534 releases elastic potential energy to push the lifting seat 533 downward to reset, driving the reciprocating slide column 532 to move downward synchronously; the lever 5 at the top of the reciprocating slide column 532... 35 moves up and down, and through sliding transmission with U-shaped rod 537, converts the vertical reciprocating thrust into a rotational torque around the hinge fulcrum of swing rod 536, driving swing rod 536 to reciprocate at a certain angle. Swing rod 536 drives swing shaft 540 to reciprocate synchronously, thereby driving coaxial bending roller 600 to perform reciprocating bending action, applying a stable frequency of alternating bending load to the sample in a continuous axial tension state, so that the film sample can simultaneously bear reciprocating bending load during continuous axial tension, realizing synchronous composite loading of axial tension and reciprocating bending.

[0048] like Figure 2 and Figure 10As shown, in a preferred embodiment of the present invention, the bending counting assembly 550 includes a ratchet 551, a counting dial 552, scale lines 553, a pawl 554, and a torsion spring 555. The ratchet 551 is rotatably mounted on the fixed base 520 and coaxially arranged with the hinged rotating end of the swing arm 536. The counting dial 552 is coaxially fixed to one side of the ratchet 551. Scale lines 553 are circumferentially equidistantly opened on the outer edge end face of the counting dial 552. The pawl 554 is engaged on one side of the ratchet 551. The pawl 554 is rotatably mounted on the swing shaft 540. One side of the pawl 554 is connected to the outer wall of the swing shaft 540 through the torsion spring 555.

[0049] The fixed base 520 has symmetrically arranged scale rods 521 on both sides. The extension direction of the scale rods 521 is parallel to the outer edge contour of the counting dial 552. A scale window 522 is opened on the scale rods 521 at the reference reading position corresponding to the scale line 553. A counting camera is arranged at the scale window 522. The acquisition end of the counting camera is aimed at the scale line 553 area in the scale window 522 to collect the scale change image of the counting dial 552 in real time. The cumulative number of bending times of the bending pressure roller 600 is automatically counted through image recognition, realizing the automatic acquisition, real-time monitoring and numerical output of counting data.

[0050] When the swing shaft 540 swings forward with the swing rod 536 and drives the bending pressure roller 600 to complete one bending action, the swing shaft 540 synchronously drives the pawl 554 to move around its own hinge point. Under the clamping force of the torsion spring 555, the pawl 554 is engaged in the tooth groove of the ratchet wheel 551, and with the swing of the swing shaft 540, it pushes the ratchet wheel 551 to rotate one tooth pitch in the counting direction. The counting dial 552 deflects one scale unit synchronously with the ratchet wheel 551, corresponding to one accumulated bending cycle, and the scale reading in the scale window 522 is updated synchronously. When the swing shaft 540 swings in the opposite direction to reset, the pawl 554 moves in the opposite direction synchronously with the swing shaft 540, along the ratchet wheel 551. The inclined surface of the tooth surface of wheel 551 slides over the tooth tip and enters the corresponding preparation position of the next tooth groove; each time the swing shaft 540 completes one reciprocating swing, it completes one round of tooth shifting cycle, and the counting dial 552 advances one counting unit to realize the accumulation of the number of bends; during the test, the operator can directly read the value of the scale line 553 on the counting dial 552 through the scale window 522 to obtain the current cumulative number of bends; when a counting camera is configured, the counting camera can capture the scale image in the scale window 522 in real time, automatically identify scale changes and output the cumulative number of times data, realizing unattended automated counting and data retention.

[0051] In a preferred embodiment, a frictional resistance structure is provided at the rotational connection between the ratchet 551 and the fixed seat 520. This structure applies constant rotational damping to the ratchet 551 during the return stroke of the pawl 554 when no force is applied to the ratchet 551. This limits the autonomous deflection of the ratchet 551 caused by its own inertia, equipment vibration, or return stroke impact, ensuring that it can stably remain at the current counting position and avoiding over-counting or under-counting errors. Furthermore, the scale line 553 corresponds to the cumulative values ​​of different gradient bending cycles.

[0052] like Figures 2 to 8 As shown, in a preferred embodiment of the present invention, the vertical drive mechanism 200 includes a vertical guide column 210, a transmission screw 220, a transmission seat 230, a drive motor 240, and a transmission component 250. The transmission screw 220 is vertically rotatably mounted on the instrument rack 100. The vertical guide columns 210 are symmetrically arranged on both sides of the transmission screw 220 and fixed on the instrument rack 100. The vertical guide columns 210 are vertically slidably connected to the lifting platform 300. The transmission screw 220 is threadedly engaged with the transmission seat 230 fixed on the lifting platform 300. A worm gear 511 is coaxially fixed to the outer wall of the transmission screw 220. One end of the transmission screw 220 is connected to the output end of the drive motor 240 fixed in the instrument rack 100 through the transmission component 250.

[0053] After the drive motor 240 starts, it outputs a constant rotational power, which is transmitted to the transmission screw 220 via the transmission component 250. This causes the transmission screw 220 to rotate at a constant speed around its vertical axis. During this rotation, the transmission screw 220, through its threaded engagement with the transmission seat 230, converts the rotational motion into vertical linear displacement, thereby causing the lifting platform 300 to rise or fall smoothly along the two vertical guide columns 210. The double vertical guide columns 210 provide rigid guiding constraints, ensuring that the lifting platform 300 remains horizontal at all times, without lateral offset or torsional sway, and ensuring axial tension. The force is uniformly applied along the axis of the sample, providing a fundamental guarantee for the stability and coaxiality of the tensile test. While the transmission screw 220 rotates, the worm gear 511, which is coaxially fixed to its outer wall, rotates synchronously at the same speed, transmitting power synchronously to the worm wheel 512. This provides continuous power input for the reciprocating oscillation of the bending pressure roller 600, enabling the film sample to simultaneously bear the reciprocating bending load during continuous axial tension. This achieves synchronous composite loading of axial tension and reciprocating bending, and the test results can directly reflect the fatigue resistance and fracture characteristics of the film under actual use conditions, significantly improving the matching degree between quality inspection data and actual use performance.

[0054] In a preferred embodiment, the transmission component 250 preferably adopts a belt drive structure consisting of a synchronous belt and a synchronous pulley.

[0055] like Figures 1 to 6 As shown, in a preferred embodiment of the present invention, the upper and lower clamping mechanism 400 includes an adjustment component 410 and a clamping component 420. The adjustment component 410 is respectively installed on the lifting platform 300 and the testing platform 110, and six sets of clamping components 420 are symmetrically arranged in the upper and lower parts of the adjustment component 410.

[0056] The adjustment assembly 410 includes a main clamping seat 411, a side clamping seat 412, a horizontal telescopic assembly 413, a vertical telescopic assembly 414, and a locking telescopic assembly 415. The main clamping seat 411 is symmetrically installed in the middle of the lifting platform 300 and the test platform 110. Two side clamping seats 412 are symmetrically arranged on both sides of the main clamping seat 411. The main clamping seat 411 and the side clamping seat 412 at the same horizontal height are connected by the horizontal telescopic assembly 413. The two side clamping seats 412 located on the same side of the main clamping seat 411 are connected by the vertical telescopic assembly 414. A locking telescopic assembly 415 is installed between the main clamping seat 411 and the side clamping seat 412 on the test platform 110. A clamping assembly 420 is installed on both the main clamping seat 411 and the side clamping seat 412.

[0057] The clamping assembly 420 includes a clamping block 421, a guide rod 422, a return spring 423, and an adjusting bolt 424. The clamping block 421 is symmetrically arranged on the main clamping seat 411 and the side clamping seat 412. The guide rod 422 is fixed to the outside of the clamping block 421. The guide rod 422 is horizontally slidably installed on the main clamping seat 411 and the side clamping seat 412. The return spring 423 is sleeved on the outside of the guide rod 422. The two ends of the return spring 423 abut against the end of the guide rod 422 and the outer wall of the clamping seat, respectively. The adjusting bolt 424 is threadedly assembled on the main clamping seat 411 and the side clamping seat 412. The end of the adjusting bolt 424 abuts against the outer wall of the clamping block 421.

[0058] According to the width specifications of the antibacterial film sample to be tested, first unlock and lock the telescopic assembly 415. Adjust the lateral distance between the main clamping seat 411 and the side clamping seat 412 through the lateral telescopic assembly 413 to make the overall clamping width match the sample width and the gauge length layout of the sample. After the adjustment is completed, lock the lateral telescopic travel of the lateral telescopic assembly 413 and cooperate with the vertical telescopic assembly 414 to fix the overall clamping width and point layout. Place the lower end of the film sample into the clamping assembly 420 on the test platform 110, place its upper end into the clamping assembly 420 on the lifting platform 300, and then screw each clamping assembly in sequence. The adjusting bolt 424 within component 420 pushes the clamping block 421 to move in opposite directions against the elastic force of the return spring 423. Guided by the guide rod 422, it smoothly clamps the upper and lower ends of the film sample, ensuring that both ends are evenly clamped by the six clamping components 420. The multi-point clamping surface formed by the six clamping components 420 evenly distributes the clamping force across the entire width of the film sample end, preventing stress concentration at single points and edge slippage. After testing, the adjusting bolt 424 is turned in the opposite direction, causing the return spring 423 to automatically open and reset the clamping block 421, allowing the film sample fragment to be removed. In a preferred embodiment, both the vertical telescopic assembly 414 and the horizontal telescopic assembly 413 employ a telescopic sleeve structure. The locking telescopic assembly 415 uses a telescopic sleeve combined with an elastic locking pin to lock the horizontal telescopic stroke after width adjustment, maintaining the clamping width of the clamping components 420 throughout the test and preventing lateral movement of the clamping points during testing.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antibacterial film tensile testing instrument, comprising an instrument frame, wherein horizontally placed testing platforms are respectively provided on the instrument frame, characterized in that, Also includes: A vertical tensile testing mechanism is provided, comprising a vertical drive mechanism, a lifting platform, and upper and lower clamping mechanisms. The vertical drive mechanism is mounted on an instrument frame, and the lifting platform is located directly above the testing platform. The lifting platform is connected to the power output end of the vertical drive mechanism. The upper and lower clamping mechanisms are respectively mounted on the lifting platform and the testing platform and are used to clamp and fix the upper and lower ends of the vertically positioned film sample. A mechanical tensile gauge is provided inside the upper and lower clamping mechanisms. A reciprocating bending test mechanism is provided, comprising a reciprocating swing mechanism and a bending pressure roller. The bending pressure roller is disposed on one side of the upper and lower clamping mechanism and located on the sample tension path of the upper and lower clamping mechanism. The reciprocating swing mechanism comprises a linkage component, a fixed base, a swing component, a swing shaft, and a bending counting component. The linkage component is mounted on one side of the instrument frame, and its power input end is drivenly connected to the power output end of the vertical drive mechanism. The fixed base is fixed to the side wall of the instrument frame. The swing component is rotatably mounted on the fixed base. One end of the swing component is drivenly connected to the power output end of the linkage component, and the other end of the swing component is fixed with a swing shaft. The swing shaft is coaxially fixed to the bending pressure roller, and both the swing shaft and the bending pressure roller are parallel to the width direction of the film sample. One end of the bending counting component is rotatably mounted on one side of the fixed base, and the other end of the bending counting component is coaxially mounted on the swing shaft.

2. The antibacterial film tensile tester according to claim 1, characterized in that, The linkage assembly includes a worm gear, a worm wheel, a linkage shaft, a second transmission component, and a rotating shaft. The worm gear is coaxially disposed at the power output end of the vertical drive mechanism. A worm wheel meshes with one side of the worm gear. The worm wheel is coaxially mounted on the linkage shaft. The linkage shaft is rotatably mounted on one side of the instrument frame. The end of the linkage shaft is connected to one end of the rotating shaft via the second transmission component. The rotating shaft is rotatably mounted on a fixed base and parallel to the linkage shaft. A swing component is coaxially fixed to one end of the rotating shaft.

3. The antibacterial film tensile tester according to claim 2, characterized in that, The swing assembly includes an eccentric cam, a reciprocating slide column, a lifting seat, a reciprocating spring, a lever, a swing arm, and a U-shaped rod. The eccentric cam is eccentrically fixed on a rotating shaft. Above the eccentric cam is a reciprocating slide column that slides vertically with the fixed seat. The bottom of the reciprocating slide column is fixed with a lifting seat that abuts against the outer edge of the eccentric cam. A reciprocating spring is sleeved on the outer side of the reciprocating slide column. The two ends of the reciprocating spring abut against the bottom of the lifting seat and the fixed seat, respectively. A lever is horizontally fixed at the top of the reciprocating slide column. The lever slides and is connected to a U-shaped rod fixed on one side of the swing arm. One end of the swing arm is rotatably mounted on one side of the fixed seat, and the other end of the swing arm is fixed with a swing shaft.

4. The antibacterial film tensile tester according to claim 1, characterized in that, The bending counting assembly includes a ratchet, a counting dial, scale lines, a pawl, and a torsion spring. The ratchet is rotatably mounted on a fixed base and coaxially arranged with the hinged rotating end of the swing arm. The counting dial is coaxially fixed to one side of the ratchet. Scale lines are circumferentially equidistantly opened on the outer edge end face of the counting dial. A pawl is engaged on one side of the ratchet. The pawl is rotatably mounted on the swing shaft. One side of the pawl is connected to the outer wall of the swing shaft through a torsion spring.

5. The antibacterial film tensile tester according to claim 4, characterized in that, The fixed base is symmetrically provided with scale rods on both sides. The extension direction of the scale rod is parallel to the outer edge contour of the counting dial. A scale window is opened on the scale rod at the reference reading position corresponding to the scale line. A counting camera is provided at the scale window, and the acquisition end of the counting camera is aligned with the scale line area inside the scale window.

6. The antibacterial film tensile tester according to claim 2, characterized in that, The vertical drive mechanism includes a vertical guide column, a transmission screw, a transmission seat, a drive motor, and a transmission component. The transmission screw is vertically rotatably mounted on the instrument frame. Vertical guide columns fixed on the instrument frame are symmetrically arranged on both sides of the transmission screw. The vertical guide columns are vertically slidably connected to the lifting platform. The transmission screw is threadedly engaged with the transmission seat fixed on the lifting platform. A worm gear is coaxially fixed to the outer wall of the transmission screw. One end of the transmission screw is connected to the output end of the drive motor fixed inside the instrument frame through the transmission component.

7. The antibacterial film tensile tester according to claim 1, characterized in that, The upper and lower clamping mechanism includes an adjustment component and a clamping component. The adjustment component is installed on the lifting platform and the test platform respectively. Six sets of clamping components are symmetrically arranged inside the adjustment component.

8. The antibacterial film tensile tester according to claim 7, characterized in that, The adjustment assembly includes a main clamping seat, side clamping seats, a lateral telescopic assembly, a vertical telescopic assembly, and a locking telescopic assembly. The main clamping seat is symmetrically installed in the middle of the lifting platform and the test platform. Two side clamping seats are symmetrically arranged on both sides of the main clamping seat. The main clamping seat and the side clamping seats at the same horizontal height are connected by the lateral telescopic assembly. The two side clamping seats on the same side of the main clamping seat are connected by the vertical telescopic assembly. A locking telescopic assembly is installed between the main clamping seat and the side clamping seats on the test platform. Clamping components are installed on both the main clamping seat and the side clamping seats.

9. The antibacterial film tensile tester according to claim 8, characterized in that, The clamping assembly includes a clamping block, a guide rod, a return spring, and an adjusting bolt. The clamping block is symmetrically arranged on the main clamping seat and the side clamping seat. A guide rod is fixed to the outside of the clamping block. The guide rod is horizontally slidably installed on the main clamping seat and the side clamping seat. A return spring is sleeved on the outside of the guide rod. The two ends of the return spring abut against the end of the guide rod and the outer wall of the clamping seat, respectively. The adjusting bolt is threaded onto the main clamping seat and the side clamping seat. The end of the adjusting bolt abuts against the outer wall of the clamping block.

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