Testing instrument for testing overturning track of chair leg support

Abstract

A test instrument for realizing a chair leg support overturning track test comprises a test platform used for bearing a seat, the test platform is provided with an overturning mechanism used for driving a leg support to overturn and driving mechanisms used for controlling the overturning mechanism to overturn, and the driving mechanisms are installed on two opposite sides of the test platform. The driving mechanism is connected with two opposite ends of the turnover mechanism; the turnover mechanism comprises a pressing piece for pressing the leg support and a turnover frame for driving the pressing piece to turn over, and the end part of the turnover frame is connected with the driving mechanism; compared with the prior art, deformation of the connecting rod assembly is driven under the action of the driving piece, so that the relative position of the pressing piece is adjusted, the overturning track of the pressing piece is set according to the needed overturning track of the leg support, the overturning situation of the leg support is observed in the overturning process of the pressing piece, testing of the overturning track of the leg support is achieved, and the testing efficiency is improved. The reliability of the leg support is ensured, and the stability of the leg support in the actual use process is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of seat detection, and in particular to a test instrument for realizing a flipping trajectory test of a leg rest of a chair. Background Art

[0002] With the continuous innovation and iteration of chair products, the concept of lunch break chair has been innovated based on the design of ordinary office chairs, that is, a leg rest is designed under the seat cushion of the office chair. Most of the leg rests in the industry are retractable structures. The purpose is to effectively support the legs of consumers during their lunch break in the chair so that they can reach a relaxed state. In the field of testing of such products, standards and methods for leg rests are currently missing. With the development of daily testing work, the original equipment for leg rest extension and retraction testing cannot meet the requirements of leg rests with special structures, such as leg rests with flip tracks.

[0003] The Chinese patent application number 202410506094.3 discloses a test device suitable for functional testing of chair components. The test device disclosed above includes different types of actuators and different "chair" component fixtures detachably connected to the actuators. Different types of actuators can drive the corresponding fixtures to perform linear motion or rotational motion in all directions. The Chinese patent application number 202211726287.7 discloses a car seat leg support detection device. The chair leg support detection device disclosed above includes an electric cylinder adjustment frame, a loading component, a detection component and an unlocking component; the electric cylinder adjustment frame includes a frame and a lifting plate, and the lifting plate can be lifted and lowered along the frame; the loading component includes an angle adjustment component and an electric cylinder, the angle adjustment component is hinged to the electric cylinder, and the angle adjustment component and the electric cylinder are respectively hinged to the lifting plate; one end of the detection component is connected to the piston end of the electric cylinder, and the other end of the detection component is connected to the unlocking component, and the detection component includes a force sensor; the unlocking component is used to unlock the leg support of the car seat.

[0004] The above-disclosed prior art is provided with different types of actuators to test the linear motion or rotational motion of the seat in various directions, and the above-disclosed automobile seat leg rest detection device also detects the durability, safety and reliability of the leg rest by adjusting the frame and loading components through an electric cylinder, but does not test the flipping trajectory of the leg rest. Summary of the invention

[0005] The present invention aims to overcome the defects in the above-mentioned prior art and provides a test instrument capable of testing the flipping trajectory of a seat leg rest and realizing the flipping trajectory test of a chair leg rest.

[0006] In order to achieve the above-mentioned invention objectives, the present invention adopts the following technical solutions: a test instrument for realizing the flip trajectory test of the leg rest of a chair, comprising a test platform for carrying a seat, the test platform is provided with a flip mechanism for driving the leg rest to flip and a driving mechanism for controlling the flipping of the flip mechanism, the driving mechanism is installed on opposite sides of the test platform, and the driving mechanism is connected to opposite ends of the flip mechanism; the flip mechanism comprises a pressing piece for pressing the leg rest and a flip frame for driving the pressing piece to flip, and the end of the flip frame is connected to the driving mechanism; the driving mechanism comprises a driving piece and a connecting rod assembly connected to the flip frame; the test platform is also provided with a fixing mechanism for preventing the seat from rotating.

[0007] As a preferred solution of the present invention, the pressing member includes a driving cylinder and a pressing block connected to the output end of the driving cylinder, the driving cylinder is installed on the turning frame, and the driving cylinder drives the pressing block to press on the leg rest.

[0008] As a preferred solution of the present invention, the flip frame is provided with a guide rod connected to the pressing block for guiding the pressing block.

[0009] As a preferred solution of the present invention, the driving mechanism further comprises a mounting member disposed on the test platform and a connecting member disposed on the mounting member, the driving member is fixedly mounted on the mounting member, and the connecting rod assembly is rotatably connected to the connecting member.

[0010] As a preferred solution of the present invention, the connecting rod assembly includes a first connecting rod and a second connecting rod which are hinged to each other, the two ends of the first connecting rod are respectively hinged to the output end of the driving member and the second connecting rod, and the middle part of the first connecting rod is rotatably connected to the connecting member.

[0011] As a preferred solution of the present invention, the connecting rod assembly also includes a third connecting rod and a fourth connecting rod for supporting the second connecting rod, the two ends of the third connecting rod are respectively hinged to the connecting member and the fourth connecting rod, the end of the fourth connecting rod is provided with a connecting seat for connecting to the flip frame, and the second connecting rod is hinged to the connecting seat.

[0012] As a preferred solution of the present invention, the mounting member is provided with an adjusting member for adjusting the height of the driving member and the connecting rod assembly, and the test platform is provided with a fastener for fastening the height of the adjusting member.

[0013] As a preferred solution of the present invention, the fixing mechanism includes an adjustment block arranged on the test platform and a fixing rod slidably connected to the adjustment block, and a positioning block for fixing the seat is provided at the end of the fixing rod.

[0014] As a preferred solution of the present invention, the fixing rod is provided with a limiter for preventing the seat from rotating, and the limiter is provided with a locking knob for locking the limiter.

[0015] As a preferred solution of the present invention, the test platform includes a test frame for installing a flipping mechanism, a driving mechanism and a fixing mechanism, and a bearing seat for placing a seat, and a positioning member for positioning the seat moving wheels is movably provided on the bearing seat.

[0016] As a preferred solution of the present invention, at least two fixing mechanisms are provided on the test platform, and the two fixing mechanisms are synchronously abutted against the seat.

[0017] As a preferred solution of the present invention, at least two pressing members are provided on the flip frame, the two pressing members rise and fall synchronously, and the two pressing members abut against opposite ends of the leg support.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. By placing the seat on the test platform, the fixing mechanism fixes the seat to prevent the seat from rotating during the test. At the same time, the flipping mechanism presses on the leg rest through the pressing piece, and the deformation of the connecting rod assembly is driven under the action of the driving member, so as to adjust the relative position of the pressing piece. The flipping trajectory of the pressing piece is set according to the required flipping trajectory of the leg rest, so as to observe the flipping of the leg rest during the flipping process of the pressing piece, realize the test of the flipping trajectory of the leg rest, ensure the reliability of the leg rest, and ensure the stability of the leg rest during actual use; 2. Furthermore, the height of the driving mechanism is adjusted by an adjusting member arranged on the mounting member, so that it is suitable for leg rests of different heights and different turning trajectories, thereby improving the practicality of the test device and the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the test platform of the present invention; Figure 3 It is a structural schematic diagram of the driving mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the regulating member; Figure 5 It is a structural schematic diagram of the flipping mechanism; Figure 6 It is a structural diagram of the fixed mechanism Figure markings: test platform 1, test frame 101, locking groove 1011, bearing seat 102, positioning member 1021, moving member 1022, tightening knob 1023, fixing mechanism 2, adjusting block 201, fixing rod 202, positioning block 2021, limiting member 203, limiting member 203, locking knob 2031, driving mechanism 3, driving member 301, driving shaft 3011, connecting rod assembly 302, first connecting rod 3021, second connecting rod 3022, third connecting rod 3023, fourth connecting rod 3024, connecting seat 3025, connecting member 303, adjusting member 304, fastener 3041, mounting member 305, flipping mechanism 4, flipping frame 401, pressing member 402, driving cylinder 4021, pressing block 4022, guide rod 403, control cabinet 5. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-Figure 6 As shown, a test instrument for realizing a flip trajectory test of a leg rest of a chair comprises a test platform 1 for carrying a seat, a flip mechanism 4 for driving the leg rest to flip and a driving mechanism 3 for controlling the flipping of the flip mechanism 4 are provided on the test platform 1, the driving mechanism 3 is installed on opposite sides of the test platform 1, and the driving mechanism 3 is connected to opposite ends of the flip mechanism 4; the flip mechanism 4 comprises a pressing member 402 for pressing the leg rest and a flip frame 401 for driving the pressing member 402 to flip, and an end of the flip frame 401 is connected to the driving mechanism 3; the driving mechanism 3 comprises a driving member 301 and a connecting rod assembly 302 connected to the flip frame 401; the test platform 1 is also provided with a fixing mechanism 2 for preventing the seat from rotating.

[0022] Furthermore, the seat is fixed on the test platform 1 by a fixing mechanism 2, and the flipping mechanism 4 is overhead on the test platform 1. The pressing piece 402 presses on the leg rest of the seat, and the pressing piece 402 and the leg rest are driven to flip synchronously under the action of the flipping frame 401. In addition, the driving mechanism 3 is arranged on both sides of the test platform 1, and the driving mechanism 3 is connected to the end of the flipping frame 401 to drive the flipping frame 401 to flip, thereby realizing the test of the flipping trajectory of the leg rest, ensuring the reliability of the leg rest, and ensuring the stability of the leg rest during actual use.

[0023] In addition, specifically, the connecting rod assembly 302 is connected to the end of the flip frame 401 , and the driving member 301 controls the connecting rod assembly 302 to operate, thereby driving the flip frame 401 to flip.

[0024] The pressing member 402 includes a driving cylinder 4021 and a pressing block 4022 connected to the output end of the driving cylinder 4021. The driving cylinder 4021 drives the pressing block 4022 to press on the leg rest. Furthermore, the lower surface of the pressing block 4022 is an arc-shaped structure. The driving cylinder 4021 controls the lifting and lowering of the pressing block 4022, so that the lower surface of the pressing block 4022 abuts against the leg rest. At the same time, since the lower surface of the pressing block 4022 is set to an arc-shaped structure, the pressing block 4022 is prevented from damaging the leg rest when it contacts the leg rest.

[0025] In addition, at least two pressing members 402 are provided on the flip frame 401, and the two pressing members 402 are raised and lowered synchronously, and the two pressing members 402 are abutted against the opposite ends of the leg rest. Furthermore, in the present embodiment, two pressing members 402 are provided, and the two pressing members 402 respectively correspond to the opposite ends of the leg rest on the seat. When the pressing blocks 4022 on the two pressing members 402 are abutted against the relative positions of the leg rest, the leg rest is driven to flip under the action of the flip frame 401, thereby ensuring that the leg rest is subjected to planar force and that the leg rest is subjected to uniform force during the flipping process, and at the same time ensuring that the leg rest will not tilt during flipping, thereby ensuring the stability and accuracy of the leg rest when testing its flipping trajectory.

[0026] The driving cylinder 4021 is arranged on the flip frame 401, and the flip frame 401 is provided with a guide rod 403 connected to the pressing block 4022 for guiding the pressing block 4022. Furthermore, the driving cylinder 4021 is vertically arranged on the flip frame 401, and a guide rod 403 is also arranged on one side of the driving cylinder 4021. The bottom end of the guide rod 403 is fixedly connected to the pressing block 4022. The guide rod 403 is vertically arranged, and the guide rod 403 is slidably connected to the flip frame 401. By setting the guide rod 403, the pressing block 4022 can always maintain a straight line movement during the lifting process, thereby ensuring that the pressing blocks 4022 pressed on the two leg rests are located at the same position of the leg rests, thereby ensuring that the two leg rests have the same flipping trajectory during the flipping process.

[0027] The driving mechanism 3 also includes a mounting member 305 arranged on the test platform 1 and a connecting member 303 arranged on the mounting member 305. The driving member 301 is fixedly mounted on the mounting member 305, and the connecting rod assembly 302 is rotatably connected to the connecting member 303. Furthermore, the mounting member 305 is vertically arranged, and the connecting member 303 is horizontally arranged. The mounting member 305 is fixedly arranged on the test platform 1. The driving member 301 can use a cylinder as a driving member. The driving member 301 is mounted on the mounting member 305, and the driving member 301 is rotatably connected to the mounting member 305. In addition, the connecting member 303 is arranged on the inner side of the mounting member 305, that is, the side facing the seat, and the connecting rod assembly 302 is rotatably connected to the end of the connecting rod assembly 303, which is used to support the connecting rod assembly 302 and serve as the rotation center of the connecting rod assembly 302.

[0028] The connecting rod assembly 302 includes a first connecting rod 3021 and a second connecting rod 3022 which are hinged to each other. The two ends of the first connecting rod 3021 are respectively hinged to the output end of the driving member 301 and the second connecting rod 3022, and the first connecting rod 3021 is rotatably set on the connecting member 303. Furthermore, the first connecting rod 3021 is a bending structure, and the bending part of the first connecting rod 3021 is set at the end of the connecting member 303, and the first connecting rod 3021 rotates around the bending part as the rotation center. The end of the first connecting rod 3021 is connected to the driving shaft 3011 at the output end of the driving member 301, and the other end of the first connecting rod 3021 is connected to the end of the second connecting rod 3022. The driving member 301 controls the driving shaft 3011 to extend and retract, thereby driving the first connecting rod 3021 to rotate, and then driving the second connecting rod 3022 to move.

[0029] At the same time, the connecting rod assembly 302 also includes a third connecting rod 3023 and a fourth connecting rod 3024 for supporting the second connecting rod 3022. The two ends of the third connecting rod 3023 are respectively hinged to the connecting piece 303 and the fourth connecting rod 3024. The end of the fourth connecting rod 3024 is provided with a connecting seat 3025 for connecting to the flip frame 401. The second connecting rod 3022 is hinged to the connecting seat 3025. Further, one end of the third connecting rod 3023 is connected to the end of the connecting piece 303, and the third connecting rod 3023 is hinged to the connecting piece 303. The connection between the rod 3023 and the connecting member 303 and the connection between the first connecting rod 3021 and the connecting member 303 are at the same position. The other end of the third connecting rod 3023 is hinged to the end of the fourth connecting rod 3024, and a connecting seat 3025 is provided on the other end of the fourth connecting rod 3024. The other end of the second connecting rod 3022 is also connected to the connecting seat 3025. The end of the flip frame 401 is fixedly connected to the connecting seat 3025, thereby realizing that the connecting rod assembly 302 drives the flip frame 401 to flip under the action of the driving member 301.

[0030] The mounting member 305 is provided with an adjusting member 304 for adjusting the height of the driving member 301 and the connecting rod assembly 302, and the test platform 1 is provided with a fastener 3041 for fastening the height of the adjusting member 304. Further, the adjusting member 304 is an L-shaped structure, one side of the adjusting member 304 is arranged on the mounting member 305, and the other side is used to install the driving member 301, and the driving member 301 is rotatably connected to the adjusting member 304, and the adjusting member 304 is connected to the mounting member 305 by bolts. At the same time, a fastener 3041 is provided at the end of the adjusting member 304. A fastener 3041 is provided, and the fastener 3041 is connected to the test platform 1 for locking and fixing the adjusting member 304. When the height of the driving member 301 needs to be adjusted, the bolts for connecting the mounting member 305 on the fastener 3041 and the adjusting member 304 are loosened, and the adjusting member 304 is moved up and down to make the height of the driving member 301 appropriate. Then, the bolts are tightened to fix the adjusting member 304 on the mounting member 305, and at the same time, the fastener 3041 is tightened to fasten the fastener 3041 to the test platform 1.

[0031] The fixing mechanism 2 includes an adjustment block 201 arranged on the test platform 1 and a fixing rod 202 slidably connected to the adjustment block 201. The end of the fixing rod 202 is provided with a positioning block 2021 for fixing the seat. Further, the fixing mechanism 2 is suspended above the seat. At least two fixing mechanisms 2 are provided on the test platform 1, and the two fixing mechanisms 2 are synchronously abutted against the seat. The fixing mechanism 2 is provided with two for fixing the seat and preventing the seat from rotating during the test. Specifically, the adjustment block 201 is fixedly arranged on the top of the test platform 1, the fixing rod 202 is vertically arranged, and the fixing rod 202 is connected to the adjustment block 201. In block 201, the fixing rod 202 can be adjusted up and down, and the fixing rod 202 is fixed by the adjusting block 201 at the same time. A positioning block 2021 is provided at the bottom end of the fixing rod 202. By adjusting the height of the fixing rod 202, the positioning block 2021 is abutted against the seat cushion of the seat, and the fixing rod 202 is locked and fixed under the action of the adjusting block 201, so as to fix the seat. The positioning blocks 2021 on the two fixing mechanisms 2 abut against the opposite ends of the seat cushion, which ensures the force balance of the seat, thereby ensuring the stability of the seat during the leg rest test and improving the test effect of the leg rest flipping trajectory.

[0032] In addition, the fixing rod 202 is provided with a limit piece 203 for preventing the seat from rotating, and the limit piece 203 is provided with a locking knob 2031 for locking the limit piece 203. Furthermore, the limit piece 203 is slidably connected to the fixing rod 202. When the positioning block 2021 fixes the seat, the limit piece 203 is adjusted so that the limit piece 203 abuts against the seat armrest. At the same time, the limit pieces 203 on the two fixing rods 202 are both located in front of the armrest. Then, the locking knob 2031 is turned to fix the limit piece 203 on the fixing rod 202, and then the seat is fixed in the circumferential direction under the action of the limit piece 203, thereby preventing the seat from rotating during the test.

[0033] The test platform 1 includes a test frame 101 for installing a flip mechanism 4, a driving mechanism 3 and a fixing mechanism 2, and a bearing seat 102 for placing a seat. A positioning member 1021 for positioning the moving wheels of the seat is movably provided on the bearing seat 102. Further, the positioning member 1021 is a cylindrical structure, and a fixing groove is provided in the positioning member 1021. The moving wheels of the seat are placed in the positioning groove, thereby realizing the positioning of the seat. In addition, the positioning member 1021 is movably provided on the bearing seat 102. Specifically, a moving member 1022 is provided on the bearing seat 102. The moving member 1022 can move on the bearing seat 102. The positioning member 1021 is fixedly arranged at the end of the movable member 1022, and at the same time a slide groove is arranged on the movable member 1022 along the length direction of the movable member 1022, and a fastening knob 1023 is arranged in the slide groove, and the fastening knob 1023 is connected to the bearing seat 102. By moving the movable member 1022, the fastening knob 1023 slides in the slide groove, so as to adjust the position of the positioning member 1021. When the position of the positioning member 1021 is appropriate, the fastening knob 1023 is turned to fix the movable member 1022 on the bearing seat 102, thereby realizing the fixation of the positioning member 1021, ensuring that the functions of different sizes can be positioned and fixed.

[0034] In addition, the mounting member 305 is fixedly mounted on the test frame 101, and a locking groove 1011 matching with the fastener 3041 is arranged on the side of the test frame 101. The locking groove 1011 is arranged along the height direction of the test frame 101, and the fastener 3041 is connected in the locking groove 1011. The locking of the adjusting member 304 is achieved by the cooperation between the fastener 3041 and the locking groove 1011.

[0035] Meanwhile, the fixing mechanism 2 is also disposed on the test frame 101 . Specifically, the fixing mechanism 2 is located at the top of the test frame 101 , and the adjustment block 201 is connected to the top of the test frame 101 .

[0036] In addition, a control cabinet 5 is provided on one side of the test platform 1 for controlling the operation of the entire device and adjusting the test parameters.

[0037] Specific test methods: Place the seat on the supporting base 102 of the test platform 1, adjust the placement position of the chair base, fix the seat by the positioning block 2021 of the fixing mechanism 2, and then adjust the limit member 203 so that the limit member 203 abuts against the front end of the seat armrest, so that the seat will not rotate during the test; then, adjust the various components and functions of the chair according to the requirements of the corresponding test items to a state that meets the corresponding standard requirements, set the initial position, control the pressing block 4022 to be applied to the leg rest, adjust the movement trajectory, and control the leg rest to flip through the driving mechanism 3 until it is compressed to the chair leg rest locking position and stops, then the flip frame 401 is returned to the initial position through the driving mechanism 3, the equipment unlocking device is opened, the chair leg rest opening device is opened again, and the leg rest is opened and extended, and the test trajectory is set according to this method to conduct the test.

[0038] Adjust to the folded position, unfold to the maximum position, return to the original position, and repeat once. Test 10,000 times and check every 500 times.

[0039] Test requirements: 1. The leg rest is unfolded to the maximum position, the front load is 30kg, and the height deviation before and after the test is no more than 7cm 2. It should not lose usability, should be able to be unfolded without interference, and should not have marks or damage after being subjected to force 3. Record the force trend chart before and after the test.

[0040] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although this article uses more of the figure markings: test platform 1, test frame 101, locking groove 1011, bearing seat 102, positioning member 1021, moving member 1022, tightening knob 1023, fixing mechanism 2, adjusting block 201, fixing rod 202, positioning block 2021, limiting member 203, limiting member 203, locking knob 2031, driving mechanism 3, driving member 301, driving shaft 3011, connecting rod assembly 302, first connecting rod 3021, second connecting rod 3022, third connecting rod 3023, fourth connecting rod 3024, connecting seat 3025, connecting member 303, adjusting member 304, fastener 3041, mounting member 305, flipping mechanism 4, flipping frame 401, pressing member 402, driving cylinder 4021, pressing block 4022, guide rod 403, control cabinet 5 and other terms, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitations interpreted as them are contrary to the spirit of the present invention.

Claims

1. A test instrument for realizing the flip trajectory test of the leg rest of a chair, characterized in that: The invention comprises a test platform (1) for carrying a seat, wherein the test platform (1) is provided with a flipping mechanism (4) for driving a leg rest to flip and a driving mechanism (3) for controlling the flipping of the flipping mechanism (4), wherein the driving mechanism (3) is installed on opposite sides of the test platform (1), and the driving mechanism (3) is connected to opposite ends of the flipping mechanism (4); the flipping mechanism (4) comprises a pressing member (402) for pressing the leg rest and a flipping frame (401) for driving the pressing member (402) to flip, wherein the end of the flipping frame (401) is connected to the driving mechanism (3); the driving mechanism (3) comprises a driving member (301) and a connecting rod assembly (302) connected to the flipping frame (401); and the test platform (1) is also provided with a fixing mechanism (2) for preventing the seat from rotating.

2. A test instrument for realizing a chair leg rest flip trajectory test according to claim 1, characterized in that: The pressing member (402) comprises a driving cylinder (4021) and a pressing block (4022) connected to the output end of the driving cylinder (4021); the driving cylinder (4021) is mounted on the turning frame (401); the driving cylinder (4021) drives the pressing block (4022) to press on the leg support.

3. A test instrument for realizing a chair leg rest flip trajectory test according to claim 2, characterized in that: The turning frame (401) is provided with a guide rod (403) connected to the pressing block (4022) for guiding the pressing block (4022).

4. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 1, characterized in that: The driving mechanism (3) further comprises a mounting member (305) arranged on the test platform (1) and a connecting member (303) arranged on the mounting member (305); the driving member (301) is fixedly mounted on the mounting member (305), and the connecting rod assembly (302) is rotatably connected to the connecting member (303).

5. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 4, characterized in that: The connecting rod assembly (302) comprises a first connecting rod (3021) and a second connecting rod (3022) which are hinged to each other, wherein two ends of the first connecting rod (3021) are respectively hinged to the output end of the driving member (301) and the second connecting rod (3022), and the middle part of the first connecting rod (3021) is rotatably connected to the connecting member (303).

6. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 5, characterized in that: The connecting rod assembly (302) further comprises a third connecting rod (3023) and a fourth connecting rod (3024) for supporting the second connecting rod (3022); the two ends of the third connecting rod (3023) are respectively hinged to the connecting member (303) and the fourth connecting rod (3024); the end of the fourth connecting rod (3024) is provided with a connecting seat (3025) for connecting to the flip frame (401); and the second connecting rod (3022) is hinged to the connecting seat (3025).

7. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 4, characterized in that: The mounting member (305) is provided with an adjusting member (304) for adjusting the height of the driving member (301) and the connecting rod assembly (302), and the test platform (1) is provided with a fastener (3041) for fastening the height of the adjusting member (304).

8. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 1, characterized in that: The fixing mechanism (2) comprises an adjustment block (201) arranged on the test platform (1) and a fixing rod (202) slidably connected to the adjustment block (201), and a positioning block (2021) for fixing the seat is provided at the end of the fixing rod (202).

9. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 8, characterized in that: The fixing rod (202) is provided with a limiting member (203) for preventing the seat from rotating, and the limiting member (203) is provided with a locking knob (2031) for locking the limiting member (203).

10. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 1, characterized in that: The test platform (1) comprises a test frame (101) for installing a turning mechanism (4), a driving mechanism (3) and a fixing mechanism (2), and a bearing seat (102) for placing a seat, wherein a positioning member (1021) for positioning a movable wheel of the seat is movably provided on the bearing seat (102).

11. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 1, characterized in that: At least two fixing mechanisms (2) are provided on the test platform (1), and the two fixing mechanisms (2) are synchronously abutted against the seat.

12. The test instrument for realizing the flip trajectory test of the chair leg rest according to claim 1, characterized in that: At least two pressing members (402) are arranged on the turning frame (401), the two pressing members (402) are raised and lowered synchronously, and the two pressing members (402) are in contact with opposite ends of the leg support.

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