A tensile test device and test method for a child safety seat

Abstract

The application relates to the technical field of testing devices, and discloses a tension testing device for a child safety seat and a testing method, which comprises a fixing frame, the top of the fixing frame is fixedly connected with a supporting plate, the inner wall of the supporting plate is fixedly connected with a first fixing rod, the inner wall of the fixing frame is slidably connected with a U-shaped frame, and the inner wall of the fixing frame is fixedly connected with a motor. When the seat is detected, pressure is applied to the right side of the detection chair, so that whether the seat frame, the backrest and other components will be deformed, broken and the like under certain pressure can be judged, the structure can withstand normal use and pressure under possible unexpected situations, the safety of children during riding is ensured, the U-shaped frame is above the cushion of the detection chair, and the U-shaped frame can protect the detection chair and prevent the detection chair from collapsing when the connection of the detection chair is damaged and the safety seat collapses.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a tensile testing device and method for a child safety seat. Background Technology

[0002] As people pay increasing attention to children's car safety, child safety seats, as an important piece of equipment to ensure children's safety in cars, have received much attention for their quality and safety. During the vehicle's operation, child safety seats need to withstand various forces, including the impact and pulling forces generated by sudden braking and collisions, to ensure the safety of children during the car ride.

[0003] Patent CN117848850B discloses a tensile testing device and method for a child safety seat, including a main fixing frame, a height support frame, a hoist tensioner, a tensile tester, an infrared laser detection mechanism, and a locking mechanism for locking the main fixing frame and the height support frame. The main fixing frame includes a first vertical support frame, a second vertical support frame, and a base frame. A lifting ring is provided on the first vertical support frame. The advantage of this application is that the safety seat to be deployed is placed on the seat support frame, and the tensile tester is used in conjunction with the hoist tensioner to perform a tensile test on the safety seat. The applied force simulates a collision test. This device applies tension to test the maximum force and deformation strength of the child safety seat, obtaining measurement results. It can also clearly identify the point at which the child safety seat is damaged, reducing the damage rate, increasing the pass rate, and saving costs. However, during the process of applying pressure to the child safety seat, the tension at the connection between the child safety seat and the device can be too great, which may cause the child safety seat to fly out during the test due to the large tension, potentially causing injury to the test personnel. Therefore, a child safety seat tension testing device and testing method are proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a tensile testing device and testing method for a child safety seat, addressing the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a tensile testing device for a child safety seat, comprising a fixed frame, a support plate fixedly connected to the top of the fixed frame, a fixing rod fixedly connected to the inner wall of the support plate, a U-shaped frame slidably connected to the inner wall of the fixed frame, a motor fixedly connected to the inner wall of the fixed frame, a threaded rod fixedly connected to the output end of the motor, an L-shaped frame fixedly connected to the bottom of the inner wall of the U-shaped frame, a sliding plate slidably connected to the inner wall of the L-shaped frame, a fixing plate fixedly connected to the bottom of the L-shaped frame, a fixing block fixedly connected to the top of the fixing plate, a quick-release device for facilitating seat assembly and disassembly provided on the left side of the U-shaped frame, an anti-jamming device to prevent jamming during testing provided at the bottom of the sliding plate, a rotating rod rotatably connected to the inner wall of the fixing block, a pull plate rotatably connected to the circumferential surface of the fixing rod, and a rotating rod rotatably connected to the side of the pull plate away from the fixing rod. The device includes a pull rod, a testing chair mounted on top of the sliding plate, a fixed frame whose inner wall is rotatably connected to the circumferential surface of the threaded rod, a fixed plate whose inner wall is threadedly connected to the circumferential surface of the threaded rod, a rotating rod whose right side is fixedly connected to the circumferential surface of the pull rod, and a testing chair whose right side is in contact with the circumferential surface of the pull rod. During seat testing, the seat to be tested is installed on the device. As the testing chair moves, it contacts the pull rod and applies pressure to the right side of the testing chair. This allows the device to determine whether components such as the seat frame and backrest will deform or crack under pressure, ensuring the structure can withstand normal use and potential unexpected situations, thus protecting children's safety. Simultaneously, the U-shaped frame moves to the right, positioning itself above the seat cushion of the testing chair. If damage occurs at the connection point of the testing chair, the U-shaped frame will protect the testing chair, preventing it from flying off.

[0006] Preferably, the quick-release device includes a locking block, which is fixedly connected to the bottom of the testing chair. A partition is fixedly connected to the inner wall of the locking block. A spring is fixedly connected to the right side of the partition. An inclined block is fixedly connected to the right side of the spring. A U-shaped plate is fixedly connected to the right side of the fixed plate. A spring is fixedly connected to the top of the U-shaped plate. An L-shaped baffle is fixedly connected to the top of the spring. A straight plate is fixedly connected to the left side of the L-shaped plate. A sliding rod is fixedly connected to the inner wall of the straight plate via a spring. The inner wall of the locking block is in contact with the inclined block. The top of the L-shaped baffle is in contact with the bottom of the sliding plate. The sliding rod and the inner wall of the sliding plate are in contact with each other. During testing, the second spring will return to its original position, causing the angle of the L-shaped baffle to contact the right side of the sliding plate, thus fixing the sliding plate and ensuring that the testing chair is at the bottom of the U-shaped frame. This prevents the testing chair from flying off and improves the safety of the testing chair during the testing process. At the same time, the inclined block will return to its original position via the first spring, allowing for quick fixing of the testing chair. This facilitates the installation and disassembly of the testing chair and improves the testing efficiency when testing in batches.

[0007] Preferably, the anti-jamming device includes an oil box, which is fixedly connected to the left side of a fixed plate. A transmission wheel is rotatably connected to the inner wall of the oil box. A bucket plate is fixedly connected to the rear of the oil box. A rotating plate is rotatably connected to the front of the transmission wheel. An opening and closing plate is rotatably connected to the inner wall of the rotating plate. A second fixed rod is rotatably connected to the front of the rotating plate. A stirring plate is fixedly connected to the circumferential surface of the second fixed rod. A pressure plate is fixedly connected to the bottom of the stirring plate. The circumferential surface of the transmission wheel is in contact with the bottom of a sliding plate. The inner wall of the oil box is slidably connected to the left and right sides of the opening and closing plate. The bottom of the pressure plate is in contact with the inner wall of the oil box. During the testing process of the testing chair, the rotating plate moves up and down, driving the opening and closing plate to move. This controls the discharge of lubricating oil, preventing excessive waste and avoiding rusting and jamming of the threaded rod during long-term use, which could prevent the device from performing tests properly. At the same time, the movement of the fixed rod drives the stirring plate to move, which agitates the lubricating oil and prevents it from solidifying and preventing it from flowing out during winter testing. The movement of the stirring plate also drives the pressure plate to move up and down, allowing the pressure plate to accelerate the discharge of lubricating oil during oil discharge, thereby improving the performance of the threaded rod.

[0008] A method for testing a child safety seat's tensile strength testing device includes the following steps:

[0009] Step 1: When performing seat testing, install the seat to be tested on the device and start the motor. The motor starts and drives the threaded rod to rotate. The rotation of the threaded rod drives the fixed plate to move to the right through the threads inside the fixed plate.

[0010] Step 2: The fixed plate moves, causing the L-shaped frame to move, which in turn causes the U-shaped frame to move, which in turn causes the sliding plate to move, which in turn causes the testing chair to move. During the movement, the testing chair will come into contact with the pull rod and apply pressure to the right side of the testing chair to perform the test.

[0011] Step 3: During the movement of the L-shaped frame, the testing chair will be limited by the pull rod so that the sliding plate will not move temporarily. When the sliding plate stops moving, the U-shaped frame moves to the right, so that the U-shaped frame is above the seat cushion of the testing chair.

[0012] Step 4: If damage occurs at the connection point of the testing chair, the U-shaped frame will protect the testing chair and prevent it from flying off.

[0013] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0014] 1. The tensile testing device and method for this child safety seat utilizes the coordinated operation of a fixed frame, support plate, fixed rod, U-shaped frame, motor, threaded rod, L-shaped frame, sliding plate, fixed plate, fixed block, rotating rod, pull plate, pull rod, and testing chair. During seat testing, the seat to be tested is installed on the device. As the testing chair moves, it comes into contact with the pull rod, applying pressure to the right side of the testing chair. This allows the device to determine whether components such as the seat frame and backrest will deform or crack under certain pressure, ensuring that the structure can withstand the pressure of normal use and potential accidents, thus guaranteeing the safety of children when riding. Simultaneously, the U-shaped frame moves to the right, positioning itself above the seat cushion of the testing chair. In the event of damage at the connection point of the testing chair, the U-shaped frame will protect the testing chair, preventing it from flying off.

[0015] 2. The tensile testing device and method for this child safety seat utilizes the coordinated operation of a locking block, partition, spring one, inclined block, U-shaped plate, spring two, L-shaped baffle, straight plate, and sliding rod. During testing, spring two resets, causing the angle of the L-shaped baffle to contact the right side of the sliding plate, thus fixing the sliding plate and ensuring the testing chair is at the bottom of the U-shaped frame. This prevents the testing chair from flying off, improving the safety of the testing chair during the testing process. Simultaneously, the inclined block resets via spring one, allowing for quick fixing of the testing chair, facilitating its installation and disassembly. This improves the testing efficiency when testing multiple testing chairs in batches.

[0016] 3. The tensile testing device and method for this child safety seat utilize the coordinated operation of the oil box, transmission wheel, bucket plate, rotating plate, opening and closing plate, fixed rod two, stirring plate, and pressure plate. During the testing process, the rotating plate reciprocates up and down, driving the opening and closing plate to move, thereby controlling the discharge of lubricating oil and preventing excessive waste. It also prevents the threaded rod from rusting and jamming during long-term use, which could prevent the device from performing tests properly. Simultaneously, the movement of fixed rod two drives the stirring plate to move, thus agitating the lubricating oil and preventing it from solidifying and preventing it from flowing out during winter testing. The movement of the stirring plate drives the pressure plate to move up and down, allowing the pressure plate to accelerate the discharge of lubricating oil during oil discharge, thereby improving the performance of the threaded rod. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the U-shaped frame structure of the present invention;

[0019] Figure 3 This is a half-sectional view of the quick-release device of the present invention;

[0020] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle;

[0021] Figure 5 This is a half-sectional view of the straight plate structure of the present invention;

[0022] Figure 6 This is a half-sectional view of the anti-jamming device of the present invention;

[0023] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B in the middle.

[0024] In the diagram: 1. Fixed frame; 2. Support plate; 3. Fixed rod one; 4. U-shaped frame; 5. Motor; 6. Threaded rod; 7. L-shaped frame; 8. Sliding plate; 9. Fixed plate; 10. Fixed block; 11. Rotating rod; 12. Pull plate; 13. Pull rod; 14. Testing chair; 15. Quick release device; 151. Locking block; 152. Partition; 153. Spring one; 154. Inclined block; 155. U-shaped plate; 156. Spring two; 157. L-shaped baffle; 158. Straight plate; 159. Sliding rod; 16. Anti-jamming device; 161. Oil box; 162. Transmission wheel; 163. Bucket plate; 164. Rotating plate; 165. Opening and closing plate; 166. Fixed rod two; 167. Stirring plate; 168. Pressure plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-7 One embodiment of the present invention is: a tensile testing device and method for a child safety seat, comprising a fixed frame 1, a support plate 2 fixedly connected to the top of the fixed frame 1, a fixed rod 3 fixedly connected to the inner wall of the support plate 2, a U-shaped frame 4 slidably connected to the inner wall of the fixed frame 1, a motor 5 fixedly connected to the inner wall of the fixed frame 1, a threaded rod 6 fixedly connected to the output end of the motor 5, an L-shaped frame 7 fixedly connected to the bottom of the inner wall of the U-shaped frame 4, and a sliding plate 8 slidably connected to the inner wall of the L-shaped frame 7. When testing the seat, the seat to be tested is installed on the device, and the motor 5 is started, causing the motor 5 to drive... The threaded rod 6 rotates, and through the threads inside the fixed plate 9, it moves the fixed plate 9 to the right. The movement of the fixed plate 9 moves the L-shaped frame 7, which in turn moves the U-shaped frame 4. The movement of the L-shaped frame 7 moves the sliding plate 8, which in turn moves the testing chair 14. During this movement, the testing chair 14 comes into contact with the pull rod 13, applying pressure to its right side. This allows the system to determine whether components such as the seat frame and backrest will deform or crack under pressure, ensuring that the structure can withstand normal use and potential unexpected situations. To ensure the safety of children while riding, the L-shaped frame 7 is fixedly connected to a fixing plate 9 at its bottom, and a fixing block 10 is fixedly connected to the top of the fixing plate 9. A quick-release device 15 for easy seat assembly and disassembly is provided on the left side of the U-shaped frame 4. An anti-jamming device 16 is provided at the bottom of the sliding plate 8 to prevent jamming during testing. A rotating rod 11 is rotatably connected to the inner wall of the fixing block 10. A pull plate 12 is rotatably connected to the circumferential surface of the fixing rod 10. A pull rod 13 is rotatably connected to the side of the pull plate 12 away from the fixing rod 10. A testing chair 14 is provided at the top of the sliding plate 8. The inner wall of the fixing frame 1 rotates with the circumferential surface of the threaded rod 6. The moving connection is as follows: the inner wall of the fixed plate 9 is threadedly connected to the circumferential surface of the threaded rod 6; the right side of the rotating rod 11 is fixedly connected to the circumferential surface of the pull rod 13; and the right side of the testing chair 14 is in contact with the circumferential surface of the pull rod 13. At the same time, during the movement of the L-shaped frame 7, the testing chair 14 is limited by the pull rod 13 so that the sliding plate 8 will not move temporarily. When the sliding plate 8 stops moving, the U-shaped frame 4 moves to the right, so that the U-shaped frame 4 is above the seat cushion of the testing chair 14. If the connection of the testing chair 14 is damaged, the U-shaped frame 4 will protect the testing chair 14 and prevent the testing chair 14 from flying off.

[0027] The quick-release device 15 includes a locking block 151, which is fixedly connected to the bottom of the testing chair 14. A partition 152 is fixedly connected to the inner wall of the locking block 151. A spring 153 is fixedly connected to the right side of the partition 152, and a wedge 154 is fixedly connected to the right side of the spring 153. When the testing chair 14 is installed on top of the sliding plate 8, the locking block 151 contacts the inner wall of the sliding plate 8 and moves the partition 152. The movement of the partition 152 moves the spring 153, and the movement of the spring 153 moves the wedge 154. When the inclined block 154 contacts the sliding plate 8, the inclined block 154 is subjected to the squeezing force from the sliding plate 8, causing the inclined block 154 to move to the left. When the locking block 151 moves to the bottom of the sliding plate 8, the inclined block 154 will be reset by the spring 153, thereby quickly fixing the inspection chair 14, which facilitates the installation and disassembly of the inspection chair 14. This improves the inspection efficiency of the inspection chair 14 when performing batch inspections. A U-shaped plate 155 is fixedly connected to the right side of the fixing plate 9. A spring 156 is fixedly connected to the top of U-shaped plate 7. An L-shaped baffle 157 is fixedly connected to the top of spring 156. A straight plate 158 is fixedly connected to the left side of L-shaped plate 7. A sliding rod 159 is fixedly connected to the inner wall of straight plate 158 via a spring. The inner wall of locking block 151 is in contact with inclined block 154. The top of L-shaped baffle 157 is in contact with the bottom of sliding plate 8. The circumferential surface of sliding rod 159 is slidably connected to the inner wall of sliding plate 8. During testing, fixed plate 9 moves to the right, causing U-shaped plate 155 to move towards... The U-shaped plate 155 moves to the right, causing the second spring 156 to move. The movement of the second spring 156 causes the L-shaped baffle 157 to move. When the L-shaped baffle 157 moves a certain distance to the right, the second spring 156 will reset, so that the included angle of the L-shaped baffle 157 will come into contact with the right side of the sliding plate 8, thereby fixing the sliding plate 8 and ensuring that the testing chair 14 is at the bottom of the U-shaped frame 4. This prevents the testing chair 14 from flying off and improves the safety of the testing chair 14 during the testing process.

[0028] Working principle: During seat inspection, the seat to be inspected is installed on the device, and motor 5 is started. Motor 5 drives the threaded rod 6 to rotate. The rotation of the threaded rod 6, through the threads inside the fixed plate 9, causes the fixed plate 9 to move to the right. The movement of the fixed plate 9 causes the L-shaped frame 7 to move, which in turn causes the U-shaped frame 4 to move. The movement of the L-shaped frame 7 causes the sliding plate 8 to move, which in turn causes the inspection chair 14 to move. During the movement, the inspection chair 14 comes into contact with the pull rod 13, applying pressure to the right side of the inspection chair 14, thereby allowing for the assessment of the seat frame, backrest, etc. The system checks whether components deform or crack under pressure to ensure their structure can withstand pressure during normal use and in case of accidents, thus guaranteeing the safety of children. During movement, the L-shaped frame 7 limits the movement of the testing chair 14 by the pull rod 13, preventing the sliding plate 8 from moving temporarily. When the sliding plate 8 stops moving, the U-shaped frame 4 moves to the right, positioning itself above the seat cushion of the testing chair 14. In the event of damage to the connection point of the testing chair 14, the U-shaped frame 4 protects the testing chair 14, preventing it from flying off.

[0029] During testing, the fixed plate 9 moves to the right, causing the U-shaped plate 155 to move to the right. The U-shaped plate 155's movement to the right causes the spring 156 to move, which in turn causes the L-shaped baffle 157 to move. When the L-shaped baffle 157 has moved a certain distance to the right, the spring 156 returns to its original position, causing the included angle of the L-shaped baffle 157 to contact the right side of the sliding plate 8. This fixes the sliding plate 8, ensuring that the testing chair 14 is at the bottom of the U-shaped frame 4, preventing the testing chair 14 from flying off and improving its safety during testing. This also ensures that the testing chair 14 is properly installed on the sliding plate 8. When at the top, the locking block 151 contacts the inner wall of the sliding plate 8 and drives the partition 152 to move. The movement of the partition 152 drives the spring 153 to move, and the movement of the spring 153 drives the inclined block 154 to move. When the inclined block 154 contacts the sliding plate 8, the inclined block 154 will be subjected to the squeezing force from the sliding plate 8, causing the inclined block 154 to move to the left. When the locking block 151 moves to the bottom of the sliding plate 8, the inclined block 154 will be reset by the spring 153, thereby quickly fixing the inspection chair 14, which facilitates the installation and disassembly of the inspection chair 14 and improves the inspection efficiency of the inspection chair 14 when performing batch inspections.

[0030] Please see Figures 1-7Based on the above embodiments, in another embodiment of the present invention, the anti-jamming device 16 includes an oil box 161, which is fixedly connected to the left side of the fixed plate 9. A transmission wheel 162 is rotatably connected to the inner wall of the oil box 161, a bucket plate 163 is fixedly connected to the rear of the oil box 161, and a rotating plate 164 is rotatably connected to the front of the transmission wheel 162. An opening and closing plate 165 is rotatably connected to the inner wall of the rotating plate 164. During the testing process of the testing chair 14, the fixed plate 9 moves, causing the oil box 161 to move. The movement of the oil box 161 causes the transmission wheel 162 to move. During the movement of the transmission wheel 162, it will come into contact with the sliding plate 8, and then drive the transmission wheel 162 to rotate through friction. The rotation of the transmission wheel 162 causes the rotating plate 164 to move up and down repeatedly. The up and down reciprocating movement of the rotating plate 164 causes the opening and closing plate 165 to move, thereby controlling the discharge of lubricating oil, avoiding excessive waste of lubricating oil, and also preventing the threaded rod 6 from rusting and jamming during long-term use. In this situation, the device cannot perform normal testing. The front part of the rotating plate 164 is rotatably connected to the fixed rod 166. The circumferential surface of the fixed rod 166 is fixedly connected to the stirring plate 167. The bottom of the stirring plate 167 is fixedly connected to the pressure plate 168. The circumferential surface of the transmission wheel 162 is in contact with the bottom of the sliding plate 8. The inner wall of the oil box 161 is slidably connected to the left and right sides of the opening and closing plate 165. The bottom of the pressure plate 168 is in contact with the inner wall of the oil box 161. At the same time, during the rotation of the rotating plate 164, the rotating plate 164 will drive the fixed rod 166 to move. The movement of the fixed rod 166 will drive the stirring plate 167 to move, thereby agitating the lubricating oil to a certain extent. This will prevent the lubricating oil from solidifying during testing in winter, thus preventing the lubricating oil from flowing out. The movement of the stirring plate 167 will drive the pressure plate 168 to move up and down, so that the pressure plate 168 can accelerate the discharge of lubricating oil when oil is discharged, thereby improving the performance of the threaded rod 6.

[0031] A method for testing a child safety seat's tensile strength testing device includes the following steps:

[0032] Step 1: When performing seat testing, install the seat to be tested on the device and start motor 5. The start of motor 5 drives the threaded rod 6 to rotate. The rotation of threaded rod 6 drives the fixed plate 9 to move to the right through the threads inside the fixed plate 9.

[0033] Step 2: The movement of the fixed plate 9 causes the L-shaped frame 7 to move, the movement of the L-shaped frame 7 causes the U-shaped frame 4 to move, the movement of the L-shaped frame 7 causes the sliding plate 8 to move, the movement of the sliding plate 8 causes the testing chair 14 to move, and the testing chair 14 will contact the pull rod 13 during the movement, and apply pressure to the right side of the testing chair 14 to perform the test;

[0034] Step 3: During the movement of the L-shaped frame 7, the testing chair 14 will be limited by the pull rod 13 so that the sliding plate 8 will not move temporarily. When the sliding plate 8 stops moving, the U-shaped frame 4 moves to the right, so that the U-shaped frame 4 is above the seat cushion of the testing chair 14.

[0035] Step 4: If damage occurs at the connection of the testing chair 14, the U-shaped frame 4 will protect the testing chair 14 to prevent it from flying off.

[0036] Working principle: During the testing process of the testing chair 14, the fixed plate 9 moves, causing the oil box 161 to move. The movement of the oil box 161 causes the transmission wheel 162 to move. During the movement of the transmission wheel 162, it comes into contact with the sliding plate 8, and thus the friction causes the transmission wheel 162 to rotate. The rotation of the transmission wheel 162 causes the rotating plate 164 to move up and down reciprocally. The up and down reciprocating movement of the rotating plate 164 causes the opening and closing plate 165 to move, thereby controlling the discharge of lubricating oil, avoiding excessive waste of lubricating oil, and also preventing the threaded rod 6 from rusting during long-term use. The jamming situation prevents the device from performing normal testing. During the rotation of the rotating plate 164, the rotating plate 164 will drive the fixed rod 166 to move. The movement of the fixed rod 166 will drive the stirring plate 167 to move, thereby agitating the lubricating oil to a certain extent. This will prevent the lubricating oil from solidifying and preventing it from flowing out during testing in winter. The movement of the stirring plate 167 will drive the pressure plate 168 to move up and down, so that the pressure plate 168 can accelerate the discharge of lubricating oil when it is discharged, thereby improving the performance of the threaded rod 6.

[0037] This invention provides a tensile testing device and method for child safety seats. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A pull test device for a child safety seat comprising a fixture (1), characterised in that: The top of the fixed frame (1) is fixedly connected with a supporting plate (2), the inner wall of the supporting plate (2) is fixedly connected with a fixed rod one (3), the inner wall of the fixed frame (1) is slidably connected with a U-shaped frame (4), the inner wall of the fixed frame (1) is fixedly connected with a motor (5), the output end of the motor (5) is fixedly connected with a threaded rod (6), the bottom of the inner wall of the U-shaped frame (4) is fixedly connected with an L-shaped frame (7), the inner wall of the L-shaped frame (7) is slidably connected with a sliding plate (8), the bottom of the L-shaped frame (7) is fixedly connected with a fixed plate (9), the top of the fixed plate (9) is fixedly connected with a fixed block (10), the left side of the U-shaped frame (4) is provided with a quick release device (15) for facilitating the disassembly of the seat, the bottom of the sliding plate (8) is provided with an anti-blocking device (16) for preventing blocking during detection, the inner wall of the fixed block (10) is rotatably connected with a rotating rod (11), the circumferential surface of the fixed rod one (3) is rotatably connected with a pull plate (12), the side, away from the fixed rod one (3), of the pull plate (12) is rotatably connected with a pull rod (13), and the top of the sliding plate (8) is provided with a detection chair (14).

2. A pull test device for a child safety seat according to claim 1, wherein: The inner wall of the fixed frame (1) is rotatably connected with the circumferential surface of the threaded rod (6), the inner wall of the fixed plate (9) is threadedly connected with the circumferential surface of the threaded rod (6), the right side of the rotating rod (11) is fixedly connected with the circumferential surface of the pull rod (13), and the right side of the detection chair (14) is in contact with the circumferential surface of the pull rod (13).

3. A pull test device for a child safety seat according to claim 2, wherein: The quick release device (15) comprises a clamping block (151), the clamping block (151) is fixedly connected to the bottom of the detection chair (14), the inner wall of the clamping block (151) is fixedly connected with a partition plate (152), the right side of the partition plate (152) is fixedly connected with a spring one (153), the right side of the spring one (153) is fixedly connected with an inclined block (154), and the right side of the fixed plate (9) is fixedly connected with a U-shaped plate (155).

4. A pull test device for a child safety seat according to claim 3, wherein: The top of the U-shaped plate (155) is fixedly connected with a spring two (156), the top of the spring two (156) is fixedly connected with an L-shaped baffle (157), the left side of the L-shaped frame (7) is fixedly connected with a straight plate (158), and the inner wall of the straight plate (158) is fixedly connected with a sliding rod (159) through a spring.

5. A pull test device for a child safety seat according to claim 4, wherein: The inner wall of the clamping block (151) is in contact with the inclined block (154), the top of the L-shaped baffle (157) is in contact with the bottom of the sliding plate (8), and the circumferential surface of the sliding rod (159) is slidably connected with the inner wall of the sliding plate (8).

6. A pull test device for a child safety seat according to claim 5, wherein: The anti-blocking device (16) comprises an oil box (161), the oil box (161) is fixedly connected to the left side of the fixed plate (9), the inner wall of the oil box (161) is rotatably connected with a transmission wheel (162), the rear portion of the oil box (161) is fixedly connected with a hopper plate (163), and the front portion of the transmission wheel (162) is rotatably connected with a rotating plate (164).

7. A pull test device for a child safety seat according to claim 6, wherein: The inner wall of the rotating plate (164) is rotationally connected with an opening and closing plate (165), the front part of the rotating plate (164) is rotationally connected with a second fixed rod (166), the circumferential surface of the second fixed rod (166) is fixedly connected with an agitating plate (167), and the bottom of the agitating plate (167) is fixedly connected with a pressing plate (168).

8. A pull test device for a child safety seat according to claim 7, wherein: The circumferential surface of the transmission wheel (162) is in contact with the bottom of the sliding plate (8), the inner wall of the oil box (161) is in sliding connection with the left and right sides of the opening and closing plate (165), and the bottom of the pressing plate (168) is in contact with the inner wall of the oil box (161).

9. A test method of a tension test device for a child safety seat, using the tension test device for a child safety seat according to claim 8, characterized by: The method comprises the following steps: Step one: when the seat is detected, the seat to be detected is installed on the device, and the motor (5) is started, the motor (5) is started to drive the threaded rod (6) to rotate, the threaded rod (6) rotates to drive the fixed plate (9) to move to the right through the thread in the fixed plate (9); Step two: the fixed plate (9) moves to drive the L-shaped frame (7) to move, the L-shaped frame (7) moves to drive the U-shaped frame (4) to move, the L-shaped frame (7) moves to drive the sliding plate (8) to move, the sliding plate (8) moves to drive the detection chair (14) to move, the detection chair (14) will contact the pull rod (13) in the moving process, and the right side of the detection chair (14) is pressed, and detection is carried out; Step three: in the moving process of the L-shaped frame (7), the detection chair (14) is limited by the pull rod (13) to make the sliding plate (8) temporarily not move, when the sliding plate (8) stops moving, the U-shaped frame (4) moves to the right, so that the U-shaped frame (4) is above the cushion of the detection chair (14); Step four: when the connection of the detection chair (14) is damaged, the U-shaped frame (4) protects the detection chair (14) to avoid the detection chair (14) from flying.

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