A sliding rail type office chair backrest reclining endurance detection device

Abstract

The application discloses a sliding rail type office chair backrest backward tilting endurance detection device and belongs to the technical field of office chair detection. The sliding rail type office chair backrest backward tilting endurance detection device comprises a workbench, a mounting frame, a detection assembly and a limiting fixing assembly. The detection assembly is installed on the mounting frame and is used for detecting the sliding rail type office chair in cooperation with the limiting fixing assembly. The position of the pressing plate on the backrest surface can be adjusted according to the height of the human body through the sliding of the sliding block and the rotation of the rotating block. Then, the damping force is generated through the rotation of the connecting shaft, so that the stability of the sliding block and the rotating block during work is ensured. Finally, the air inside the connecting sleeve is extruded by the piston and is shunted by the shunting mechanism, so that the office chair can be detected by simulating the force applied on the chair surface and the backrest after the human body sits down. The method for detecting the office chair by extruding the air has the advantages of fast response speed, high-frequency operation and the like.

Description

Technical Field

[0001] This invention relates to the technical field of office chair testing, and in particular to a device for testing the durability of the backrest tilt of a sliding office chair. Background Technology

[0002] Sliding rail office chairs are a type of office chair with a unique design and function. They typically use sliding rails in the seat cushion, armrests, headrest, or leg rest to achieve more flexible adjustments and a comfortable user experience. The backrest is a key component that supports the human back and maintains a stable sitting posture. Its performance directly affects the user's comfort, health and safety, and product durability. Testing the backrest is an important step in ensuring the quality of office chairs.

[0003] When a person sits in an office chair and leans back, the force borne by the backrest is about 20% to 40% of their body weight.

[0004] Chinese patent CN117871072A, authorized and published on April 12, 2024, discloses a durability testing device for office chairs. It utilizes a base plate, a fixed column, a first compression component, and a fixed component in combination. The first compression component can perform compression testing on the armrests of the office chair, and it can slide on the outer wall of the fixed column to adjust its height and angle. However, this durability testing device cannot simulate the working posture of a person sitting down; instead, it applies force directly to the surface of the office chair, resulting in an insufficiently rigorous testing process. Summary of the Invention

[0005] The purpose of this invention is to provide a device for detecting the durability of the backrest tilt of a sliding office chair, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a durability testing device for the backrest tilt of a sliding office chair, comprising: a worktable, a mounting frame, mounted on the worktable, a fixing component, mounted on the mounting frame for limiting the movement of the sliding office chair, and a testing component, mounted on the mounting frame and used in conjunction with the fixing component to limit the movement of the sliding office chair.

[0007] Furthermore, the detection component includes a detection mechanism, a diversion mechanism, and an adjustment mechanism;

[0008] The detection mechanism includes a hydraulic cylinder fixed on the surface of the mounting frame and a sleeve mounted on the adjustment mechanism. A connecting sleeve adapted to the hydraulic cylinder is provided on the outer wall of the mounting frame. A chute is provided on the inner wall of the hydraulic cylinder, and a connecting column is slidably connected to the inner wall of the chute. A pressing block is fixedly connected to the outer wall of the bottom end of the connecting column. A second connecting rod is slidably connected to the inner wall of the connecting column. A force-bearing plate is fixedly connected to the outer wall of the bottom end of the second connecting rod. A return spring adapted to the second connecting rod is provided on the inner wall of the connecting column. An extrusion block is fixedly connected to the outer wall of the top end of the second connecting rod. A limiting block adapted to the extrusion block is provided on the inner wall of the connecting column. A first limiting spring adapted to the limiting block is provided on the inner wall of the connecting column. A limiting groove adapted to the limiting block is provided on the inner wall of the hydraulic cylinder. Multiple groups of push rods that are sleeved with each other and slide axially are provided on the inner wall of the sleeve. A pressing plate is fixedly connected to the outer wall of one end of the push rod. A piston for squeezing the air inside the connecting sleeve is provided on the outer wall of the hydraulic cylinder, and the gas is pushed into the chute and the inside of the sleeve in proportion through the shunt mechanism.

[0009] Further, a pressure relief groove is provided on the outer wall of the second connecting rod, and the pressure relief groove is in a "匚" shape. A pressure relief hole adapted to the pressure relief groove is provided on the outer wall of the connecting column.

[0010] Further, the shunt mechanism includes a pressure tank provided on the outer wall of the connecting sleeve and a ventilation passage opened on the inner wall of the connecting column and adapted to the chute. The pressure tank is connected to the connecting sleeve through a connecting hole. A first air outlet is provided on the outer wall of the pressure tank. A connecting passage adapted to the first air outlet is provided on the inner wall of the connecting sleeve. An air pipe adapted to the ventilation passage is provided on the outer wall of the connecting passage. A second air outlet is provided on the outer wall of the pressure tank. A third air outlet is provided on the outer wall of the pressure tank. A sliding rod is slidably connected to the inner wall of the pressure tank. A blocking block adapted to the third air outlet is provided on the outer wall of the sliding rod. An intake passage is opened on the inner wall of the pressure tank. An empty chamber adapted to the intake passage is provided on the inner wall of the pressure tank. A connecting spring adapted to the sliding rod is provided on the inner wall of the pressure tank. A connecting piece adapted to the second air outlet and the third air outlet is provided on the outer wall of the pressure tank. A connecting hose adapted to the sleeve is provided on the outer wall of the connecting piece.

[0011] Further, the ratio of the caliber sizes among the first air outlet, the second air outlet and the third air outlet is 5:1:1.

[0012] Furthermore, the adjustment mechanism includes a connecting groove formed on the outer wall of the connecting sleeve, a slider slidably connected to the outer wall of the connecting groove, a rotating block rotatably connected to the outer wall of the slider, a connecting shaft adapted to the rotating block on the outer wall of the slider, a rubber sleeve on the inner wall of the rotating block, a transmission rod slidably connected to the inner wall of the connecting shaft, a push plate adapted to the rubber sleeve on the outer wall of one end of the transmission rod, and a threaded groove adapted to the push plate on the inner wall of the rotating block.

[0013] Furthermore, the adjustment mechanism also includes an air chamber formed on the inner wall of the slider, and a connecting ring set on the outer wall of one end of the transmission rod. A piston ring is fixedly connected to the outer wall of the connecting ring, and an extrusion plate is fixedly connected to the outer wall of the piston ring. A force-bearing block adapted to the extrusion plate is provided on the inner wall of the slider, and a rubber block adapted to the rotating block is provided on the outer wall of the force-bearing block. An air injection channel adapted to the air chamber is provided on the inner wall of the slider, and a sliding column is slidably connected to the inner wall of the air injection channel. An extrusion strip adapted to the sliding groove is provided on the outer wall of the sliding column.

[0014] Furthermore, the adjustment mechanism also includes a connecting block slidably connected to the connecting shaft. A second limiting spring adapted to the connecting block is provided on the inner wall of the connecting shaft. A knob is fixedly connected to the outer wall of the connecting block. A locking block is slidably connected to the outer wall of the knob. A third limiting spring adapted to the locking block is provided on the inner wall of the knob. A locking groove adapted to the locking block is provided on the outer wall of the slider.

[0015] Furthermore, the fixing component includes a first fixing sleeve fixed to the outer wall of the mounting bracket, a first connecting rod rotatably connected to the outer wall of the mounting bracket, a second fixing sleeve fixedly connected to the bottom outer wall of the first connecting rod, a pin slidably connected to the top outer wall of the first connecting rod, and a pin-fitting insertion hole provided on the outer wall of the mounting bracket.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This sliding rail office chair backrest tilt durability detection device, through the sliding of the slider and the rotation of the rotating block, can adjust the position of the pressure plate applied to the backrest surface according to the height of the human body. Then, the rotation of the connecting shaft generates damping force, ensuring the stability of the slider and the rotating block during operation. Finally, by the piston compressing the air inside the connecting sleeve and cooperating with the air diversion mechanism to divert the air, the force applied to the seat and backrest when a human body sits down can be simulated to detect the office chair. The method of detecting the office chair by compressing air to realize the pressure block and pressure plate has the advantages of fast response speed and high-frequency operation. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the cooperative structure of the first connecting rod and the second fixing sleeve of the present invention;

[0019] Figure 3 This is a schematic diagram of the interlocking structure of the pin and the socket of the present invention;

[0020] Figure 4 This is a schematic diagram of the cooperation structure between the mounting bracket and the hydraulic cylinder of the present invention;

[0021] Figure 5 This is a schematic diagram of the interaction between the hydraulic cylinder and the connecting column of the present invention;

[0022] Figure 6 This is a schematic diagram of the interlocking structure of the pressure tank and the connecting hole of the present invention;

[0023] Figure 7 This is a schematic diagram of the interlocking structure of the pressure relief groove and pressure relief hole of the present invention;

[0024] Figure 8 This is a schematic diagram of the interaction between the air intake channel and the empty chamber of the present invention;

[0025] Figure 9 This is a schematic diagram of the structure in which the sleeve and push rod of the present invention cooperate with each other;

[0026] Figure 10 This is a schematic diagram of the interlocking structure of the connecting shaft and the rotating block of the present invention;

[0027] Figure 11 This is a schematic diagram of the interaction between the rotating block and the threaded groove of the present invention;

[0028] Figure 12 This is a schematic diagram of the interlocking structure of the card block and card slot of the present invention;

[0029] Figure 13 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0030] Figure 14 For the present invention Figure 10 Enlarged structural diagram at point B;

[0031] Figure 15 For the present invention Figure 10 Enlarged structural diagram at point C.

[0032] In the diagram: 1. Workbench; 2. Mounting bracket; 3. Fixing assembly; 301. First fixing sleeve; 302. First connecting rod; 303. Second fixing sleeve; 304. Pin; 305. Insertion hole; 4. Detection assembly; 401. Hydraulic cylinder; 402. Connecting sleeve; 403. Connecting column; 404. Pressing block; 405. Second connecting rod; 406. Force plate; 407. Return spring; 408. Pressing block; 409. Limiting block; 410. First limiting spring; 411. Limiting groove; 412. Piston; 413. Pressure tank; 414. Connecting hole; 415. First air outlet; 416. Connecting channel; 417. Vent pipe; 418. Vent channel; 419. Slide groove; 420. Second air outlet; 421. Third air outlet; 422. Slide rod; 423. Blocking 424. Intake passage; 425. Empty chamber; 426. Connecting spring; 427. Connector; 428. Connecting hose; 429. Sleeve; 430. Push rod; 431. Pressing plate; 432. Pressure relief groove; 433. Pressure relief hole; 434. Connecting groove; 435. Slider; 436. Connecting shaft; 437. Rotating block; 438. Rubber sleeve; 439. Transmission rod; 440. Push plate; 441. Threaded groove; 442. Air chamber; 443. Connecting ring; 444. Piston ring; 445. Extrusion plate; 446. Force-bearing block; 447. Rubber block; 448. Air injection passage; 449. Sliding column; 450. Extrusion strip; 451. Connecting block; 452. Second limit spring; 453. Knob; 454. Locking block; 455. Third limit spring; 456. Locking groove. Detailed Implementation

[0033] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Example 1: Please refer to Figures 1-12 The present invention provides a technical solution: a device for testing the backrest tilt durability of a sliding office chair, including a workbench 1, a mounting frame 2 mounted on the workbench 1, a fixing component 3 mounted on the mounting frame 2 for limiting the movement of the sliding office chair, and a testing component 4 mounted on the mounting frame 2, which works in conjunction with the fixing component 3 to test the sliding office chair.

[0036] The detection component 4 includes a detection mechanism, a diversion mechanism, and an adjustment mechanism. The detection mechanism includes a hydraulic cylinder 401 fixed to the surface of the mounting frame 2 and a sleeve 429 mounted on the adjustment mechanism. A connecting sleeve 402 adapted to the hydraulic cylinder 401 is provided on the outer wall of the mounting frame 2. A sliding groove 419 is provided on the inner wall of the hydraulic cylinder 401. A connecting column 403 is slidably connected to the inner wall of the sliding groove 419. A pressing block 404 is fixedly connected to the outer wall of the bottom end of the connecting column 403. A second connecting rod 405 is slidably connected to the inner wall of the connecting column 403. A force-bearing plate 406 is fixedly connected to the outer wall of the bottom end of the second connecting rod 405. A return spring 407 adapted to the second connecting rod 405 is provided on the inner wall of the connecting column 403. A pressing block 408 is fixedly connected to the outer wall of the top end of the second connecting rod 405. A limiting block 409 adapted to the pressing block 408 is provided on the inner wall of the connecting column 403. A first limiting spring 410 adapted to the limiting block 409 is provided on the inner wall of the connecting column 403. A limiting groove 411 adapted to the limiting block 409 is provided on the inner wall of the hydraulic cylinder 401. Multiple sets of push rods 430 that are interlocked and slide axially are provided on the inner wall of the sleeve 429. A pressing plate 431 is fixedly connected to the outer wall of one end of the push rod 430. A piston 412 for squeezing the air inside the connecting sleeve 402 is provided on the outer wall of the hydraulic cylinder 401, and the gas is pushed into the slide groove 419 and the sleeve 429 in proportion with the flow distribution mechanism.

[0037] During use, first start the hydraulic cylinder 401 to push the connecting column 403 to slide downward, so that the connecting column 403 slides out of the inside of the connecting sleeve 402. When the hydraulic cylinder 401 pushes the connecting column 403 to move downward, it can带动 the piston 412, the pressing block 404 and the force-bearing plate 406 to move downward synchronously. When the force-bearing plate 406 contacts the chair surface, continue to push the connecting column 403 to slide downward through the hydraulic cylinder 401, so that the chair surface pushes the second connecting rod 405 to slide upward along the inner wall of the connecting column 403 to squeeze and reset the spring 407. When the second connecting rod 405 slides upward, it can推动 the extrusion block 408 to move upward synchronously, so that the extrusion block 408 squeezes the limiting block 409. After being squeezed, the limiting block 409 will slide into the inside of the connecting column 403 and squeeze the first limiting spring 410, so that the limiting block 409 slides out of the inside of the limiting groove 411, thereby解除 the connection between the hydraulic cylinder 401 and the connecting column 403. At this time, when the hydraulic cylinder 401 continues to move downward, it will推动 the piston 412 to squeeze the air in the connecting sleeve 402 into the inside of the chute 419 and the sleeve 429 through the shunt mechanism. At this time, the air pressure in the chute 419 increases,从而推动 the connecting column 403 to slide outwards, so that the pressing block 404 simulates the action of a person sitting down to press the chair surface. At the same time, the air pressure in the sleeve 429 increases and推动 the push rod 430 to slide outwards, thereby推动 the pressing plate 431 to exert pressure on the backrest, so that the pressing plate 431 simulates the action of a person lying backward after sitting down to press the backrest. The method of detecting the office chair by挤压 air to实现 the pressing block 404 and the pressing plate 431 has the advantages of fast response speed and high-frequency operation.

[0038] A pressure relief groove 432 is provided on the outer wall of the second connecting rod 405, and the pressure relief groove 432 is in the shape of a "匚", and a pressure relief hole 433 adapted to the pressure relief groove 432 is provided on the outer wall of the connecting column 403.

[0039] During use, when the hydraulic cylinder 401 pushes the connecting column 403 and the piston 412 to slide downward synchronously, the air in the connecting sleeve 402 will be挤压 and enter the inside of the pressure relief groove 432 through the pressure relief hole 433 and be discharged. When the second connecting rod 405 slides upward along the inner wall of the connecting column 403, the pressure relief groove 432 will be separated from the pressure relief hole 433 and prevent the air in the connecting sleeve 402 from continuing to be discharged.

[0040] The diversion mechanism includes a pressure tank 413 disposed on the outer wall of the connecting sleeve 402, and a venting channel 418 formed on the inner wall of the connecting column 403 and adapted to the slide groove 419. The pressure tank 413 and the connecting sleeve 402 are connected through a connecting hole 414. A first vent 415 is provided on the outer wall of the pressure tank 413. A connecting channel 416 adapted to the first vent 415 is provided on the inner wall of the connecting sleeve 402. A vent pipe 417 adapted to the venting channel 418 is provided on the outer wall of the connecting channel 416. A second vent 420 and a third vent 421 are provided on the outer wall of the pressure tank 413. A sliding rod 422 is slidably connected to the inner wall of pressure tank 3. A sealing block 423 adapted to the third air outlet 421 is provided on the outer wall of the sliding rod 422. An air inlet channel 424 is provided on the inner wall of pressure tank 413. An empty chamber 425 adapted to the air inlet channel 424 is provided on the inner wall of pressure tank 413. A connecting spring 426 adapted to the sliding rod 422 is provided on the inner wall of pressure tank 413. A connecting piece 427 adapted to the second air outlet 420 and the third air outlet 421 is provided on the outer wall of pressure tank 413. A connecting hose 428 adapted to the sleeve 429 is provided on the outer wall of the connecting piece 427. The diameter ratio between the first air outlet 415, the second air outlet 420 and the third air outlet 421 is 5:1:1.

[0041] During use, the air inside the connecting sleeve 402 is compressed and enters the pressure tank 413 through the connecting hole 414. After entering the pressure tank 413, the air increases its internal pressure. Then, the air inside the pressure tank 413 splits into two streams. One stream exits from the first air outlet 415 and enters the vent pipe 417 through the connecting channel 416. Then, it exits from the vent pipe 417 and enters the vent channel 418, and finally exits into the slide groove 419. This increases the pressure inside the slide groove 419 and pushes the connecting column 403 to slide downward. It is worth noting that when the connecting column 403 slides downward, the vent pipe 417 slides into the vent channel 418 through the sliding connection between the vent channel 418 and the vent pipe 417. The other stream of air enters the connector 427 through the second air outlet 420 and then enters the connecting hose 428. Inside the sleeve 429, when the air entering the pressure tank 413 is greater than the air discharged from the first air outlet 415 and the second air outlet 420, the air inside the pressure tank 413 will enter the empty chamber 425 through the air inlet channel 424, increasing the air pressure inside the empty chamber 425. This will push the slide rod 422 upward and compress the connecting spring 426. When the slide rod 422 slides upward, it can push the sealing block 423 to move upward synchronously, thereby releasing the restriction on the third air outlet 421. This allows air to be discharged into the connector 427 through the third air outlet 421. By controlling the diameter ratio between the first air outlet 415, the second air outlet 420 and the third air outlet 421, the air entering the sleeve 429 is always controlled at 20% to 40% of the air entering the pressure tank 413, thereby simulating the pressure applied to the backrest when a person sits down.

[0042] The adjusting mechanism includes a connecting groove 434 formed on the outer wall of the connecting sleeve 402, a slider 435 slidably connected to the outer wall of the connecting groove 434, a rotating block 437 damped and rotatably connected to the outer wall of the slider 435, a connecting shaft 436 adapted to the rotating block 437 provided on the outer wall of the slider 435, a rubber sleeve 438 provided on the inner wall of the rotating block 437, a transmission rod 439 slidably connected to the inner wall of the connecting shaft 436, a push plate 440 adapted to the rubber sleeve 438 provided on the outer wall of one end of the transmission rod 439, and a threaded groove 441 adapted to the push plate 440 provided on the inner wall of the rotating block 437.

[0043] In use, first push the slider 435 to slide along the surface of the connecting groove 434, then move the sleeve 429 to push the rotating block 437 to rotate on the surface of the slider 435. The position of the pressure plate 431 applied to the backrest surface can be adjusted according to the height of the user. Then, through the connection between the transmission rod 439 and the push plate 440, when the connecting shaft 436 is rotated, the rotational motion of the push plate 440 and the connecting shaft 436 can be converted into the linear motion of the push plate 440 along the surface of the connecting shaft 436. This causes the push plate 440 to squeeze the rubber sleeve 438. After being squeezed, the rubber sleeve 438 deforms and bulges outward to squeeze the inner wall of the rotating block 437, thereby generating damping and completing the limiting of the rotating block 437.

[0044] The adjustment mechanism also includes an air chamber 442 formed on the inner wall of the slider 435, and a connecting ring 443 set on the outer wall of one end of the transmission rod 439. A piston ring 444 is fixedly connected to the outer wall of the connecting ring 443, and an extrusion plate 445 is fixedly connected to the outer wall of the piston ring 444. A force-bearing block 446 adapted to the extrusion plate 445 is set on the inner wall of the slider 435. A rubber block 447 adapted to the rotating block 437 is set on the outer wall of the force-bearing block 446. An air injection channel 448 adapted to the air chamber 442 is set on the inner wall of the slider 435. A sliding column 449 is slidably connected to the inner wall of the air injection channel 448. An extrusion strip 450 adapted to the sliding groove 419 is set on the outer wall of the sliding column 449.

[0045] In use, when the push plate 440 moves, it pulls the transmission rod 439 to move synchronously, causing the transmission rod 439 to pull the connecting ring 443 and piston ring 444 to slide inside the air chamber 442 and compress the air inside the air chamber 442. This compresses the air inside the air chamber 442 into the air injection channel 448, increasing the pressure inside the air injection channel 448 and pushing the sliding column 449 outward. The sliding column 449 pushes the extrusion strip 450 to press the surface of the connecting groove 434 and generate damping, ensuring the stability of the connection between the slider 435 and the connecting groove 434. At the same time, when the piston ring 444 moves, it can push the extrusion plate 445 to press the force block 446, thereby pushing the force block 446 and the rubber block 447 to press the inner wall of the rotating block 437 and generate damping, which can further limit the rotation block 437.

[0046] The adjustment mechanism also includes a connecting block 451 that is slidably connected to the connecting shaft 436. A second limiting spring 452 adapted to the connecting block 451 is provided on the inner wall of the connecting shaft 436. A knob 453 is fixedly connected to the outer wall of the connecting block 451. A locking block 454 is slidably connected to the outer wall of the knob 453. A third limiting spring 455 adapted to the locking block 454 is provided on the inner wall of the knob 453. A slot 456 adapted to the locking block 454 is provided on the outer wall of the slider 435.

[0047] In use, when rotating the connecting shaft 436, simply rotate the knob 453 to drive the connecting shaft 436 to rotate via the connecting block 451. At this time, the clamping block 454 is pushed into the groove 456 by the clamping slot 456, thereby squeezing the third limiting spring 455. Then, the engagement of the clamping block 454 with the groove 456 can limit the knob 453. When it is necessary to release the limit on the rotating block 437, simply pull the knob 453 to drive the connecting block 451 to slide inside the connecting shaft 436 and squeeze the second limiting spring 452, so that the clamping block 454 slides out of the groove 456, and then the knob 453 can be turned to rotate in the opposite direction.

[0048] The fixing component 3 includes a first fixing sleeve 301 fixed to the outer wall of the mounting bracket 2, a first connecting rod 302 rotatably connected to the outer wall of the mounting bracket 2, a second fixing sleeve 303 fixedly connected to the bottom outer wall of the first connecting rod 302, a pin 304 slidably connected to the top outer wall of the first connecting rod 302, and a socket 305 adapted to the pin 304 provided on the outer wall of the mounting bracket 2.

[0049] In use, after placing the sliding office chair on the surface of the workbench 1, the gas spring of the office chair is made to fit against the first fixing sleeve 301. Then, by pushing the pin 304, the first connecting rod 302 and the second fixing sleeve 303 are rotated, so that the second fixing sleeve 303 is closed with the first fixing sleeve 301. Then, the pin 304 is pushed to slide on the surface of the first connecting rod 302, so that one end of the pin 304 is inserted into the interior of the insertion hole 305, which can limit the second fixing sleeve 303, thereby completing the limitation of the office chair.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the durability of the backrest tilt of a sliding office chair, characterized in that, include: Workbench (1); mounting frame (2), mounted on workbench (1); fixing component (3), mounted on mounting frame (2), used to limit the movement of the slide rail office chair; detection component (4), mounted on mounting frame (2), and used in conjunction with the limiting of fixing component (3) to detect the slide rail office chair; the detection component (4) includes a detection mechanism, a diversion mechanism and an adjustment mechanism; the detection mechanism includes a hydraulic cylinder (401) fixed on the surface of mounting frame (2) and a sleeve (429) mounted on the adjustment mechanism, the outer wall of the mounting frame (2) is provided with a connecting sleeve (402) adapted to the hydraulic cylinder (401), and the inner wall of the hydraulic cylinder (401) is provided with a sliding groove (41). 9) A connecting column (403) is slidably connected to the inner wall of the slide (419). A pressing block (404) is fixedly connected to the outer wall of the bottom end of the connecting column (403). A second connecting rod (405) is slidably connected to the inner wall of the connecting column (403). A force-bearing plate (406) is fixedly connected to the outer wall of the bottom end of the second connecting rod (405). A return spring (407) adapted to the second connecting rod (405) is provided on the inner wall of the connecting column (403). A pressing block (408) is fixedly connected to the outer wall of the top end of the second connecting rod (405). A limiting block (409) adapted to the pressing block (408) is provided on the inner wall of the connecting column (403). The inner wall of the column (403) is provided with a first limiting spring (410) adapted to the limiting block (409), the inner wall of the hydraulic cylinder (401) is provided with a limiting groove (411) adapted to the limiting block (409), the inner wall of the sleeve (429) is provided with multiple sets of push rods (430) that are sleeved together and slide axially, a pressing plate (431) is fixedly connected to the outer wall of one end of the push rod (430), the outer wall of the hydraulic cylinder (401) is provided with a piston (412) for squeezing the air inside the connecting sleeve (402), and in conjunction with the flow distribution mechanism, pushes the gas proportionally into the slide groove (419) and the sleeve (429); the adjustment mechanism includes a spring (410) opened in the connecting sleeve (403). 2) A connecting groove (434) on the outer wall, a slider (435) is slidably connected to the outer wall of the connecting groove (434), a rotating block (437) is damped and rotatably connected to the outer wall of the slider (435), a connecting shaft (436) adapted to the rotating block (437) is provided on the outer wall of the slider (435), a rubber sleeve (438) is provided on the inner wall of the rotating block (437), a transmission rod (439) is slidably connected to the inner wall of the connecting shaft (436), a push plate (440) adapted to the rubber sleeve (438) is provided on the outer wall of one end of the transmission rod (439), and a threaded groove (441) adapted to the push plate (440) is provided on the inner wall of the rotating block (437).

2. The device for testing the backrest tilt durability of a sliding office chair according to claim 1, characterized in that: A pressure relief groove (432) is provided on the outer wall of the second connecting rod (405), and the pressure relief groove (432) is in a "C" shape. A pressure relief hole (433) adapted to the pressure relief groove (432) is provided on the outer wall of the connecting column (403).

3. The device for testing the backrest tilt durability of a sliding office chair according to claim 1, characterized in that: The flow splitting mechanism includes a pressure tank (413) provided on the outer wall of the connecting sleeve (402), and a ventilation channel (418) opened on the inner wall of the connecting column (403) and adapted to the sliding groove (419). The pressure tank (413) is connected to the connecting sleeve (402) through a connecting hole (414). A first air outlet (415) is provided on the outer wall of the pressure tank (413). A connecting channel (416) adapted to the first air outlet (415) is provided on the inner wall of the connecting sleeve (402). A ventilation pipe (417) adapted to the ventilation channel (418) is provided on the outer wall of the connecting channel (416). A second air outlet (420) is provided on the outer wall of the pressure tank (413). A third air outlet (421) is provided on the outer wall of the pressure tank (413). A slide rod (422) is slidably connected to the inner wall of the pressure tank (413). A blocking block (423) adapted to the third air outlet (421) is provided on the outer wall of the slide rod (422). An air inlet channel (424) is opened on the inner wall of the pressure tank (413). An empty chamber (425) adapted to the air inlet channel (424) is provided on the inner wall of the pressure tank (413). A connecting spring (426) adapted to the slide rod (422) is provided on the inner wall of the pressure tank (413). A connecting member (427) adapted to the second air outlet (420) and the third air outlet (421) is provided on the outer wall of the pressure tank (413). A connecting hose (428) adapted to the sleeve (429) is provided on the outer wall of the connecting member (427).

4. The device for detecting the backrest tilt durability of a sliding office chair according to claim 3, characterized in that: The ratio of the caliber sizes among the first air outlet (415), the second air outlet (420) and the third air outlet (421) is 5:1:

1.

5. The device for detecting the backrest tilt durability of a sliding office chair according to claim 1, characterized in that: The adjusting mechanism further includes an air chamber (442) opened on the inner wall of the slider (435), and a connecting ring (443) provided on the outer wall of one end of the transmission rod (439). A piston ring (444) is fixedly connected to the outer wall of the connecting ring (443). An extrusion plate (445) is fixedly connected to the outer wall of the piston ring (444). A force-receiving block (446) adapted to the extrusion plate (445) is provided on the inner wall of the slider (435). A rubber block (447) adapted to the rotating block (437) is provided on the outer wall of the force-receiving block (446). An air injection channel (448) adapted to the air chamber (442) is provided on the inner wall of the slider (435). A sliding column (449) is slidably connected to the inner wall of the air injection channel (448). An extrusion strip (450) adapted to the sliding groove (419) is provided on the outer wall of the sliding column (449).

6. The device for testing the backrest tilt durability of a sliding office chair according to claim 1, characterized in that: The adjustment mechanism further includes a connecting block (451) slidably connected to the connecting shaft (436). A second limiting spring (452) adapted to the connecting block (451) is provided on the inner wall of the connecting shaft (436). A knob (453) is fixedly connected to the outer wall of the connecting block (451). A locking block (454) is slidably connected to the outer wall of the knob (453). A third limiting spring (455) adapted to the locking block (454) is provided on the inner wall of the knob (453). A locking groove (456) adapted to the locking block (454) is provided on the outer wall of the slider (435).

7. The device for detecting the backrest tilt durability of a sliding office chair according to claim 1, characterized in that: The fixing component (3) includes a first fixing sleeve (301) fixed on the outer wall of the mounting frame (2), a first connecting rod (302) rotatably connected to the outer wall of the mounting frame (2), a second fixing sleeve (303) fixedly connected to the bottom outer wall of the first connecting rod (302), a pin (304) slidably connected to the top outer wall of the first connecting rod (302), and a socket (305) adapted to the pin (304) provided on the outer wall of the mounting frame (2).

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