Office chair back pulling fatigue testing machine
By designing an office chair back fatigue testing machine with an adjustable and quickly detachable curved push plate and protective pad, the problems of non-removable push blocks and easy damage to seats in existing technologies have been solved, achieving applicability to chairs of different shapes and seat stability.
Patent Information
- Application Number
- CN202423307064.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing backrest fatigue testing machine has a non-removable push block and lacks a protective mechanism, which makes the chair back easy to be damaged during testing. It is not suitable for non-rectangular chairs, and the seat is prone to shifting during the test.
An office chair back fatigue testing machine was designed, comprising an electric slide rail, a load-bearing plate, an electric telescopic rod, and an arc-shaped push plate. The electric slide rail and electric telescopic rod work together to achieve height adjustment and quick assembly/disassembly of the arc-shaped push plate. It is also equipped with protective pads and limit plates to ensure stable clamping of the chair and prevent wear.
It improves the applicability of the testing machine and the stability of the seat, enabling it to adapt to chairs of different shapes and sizes, reducing wear, preventing the seat from shifting during testing, and extending the service life of the seat.
Smart Images
Figure CN223856729U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to office chair test technical field, concretely relates to a kind of office chair back fatigue testing machine. BACKGROUND
[0002] Office chair refers to the various chairs equipped for the convenience of work in daily work and social activities, and office chair is divided into narrow sense and broad sense by office partner, and the backrest chair sat by person in sitting posture state carries out desktop work, and the office chair for all chairs used in office, including large class chair, middle class chair, guest chair, staff chair, meeting chair, visitor chair and training chair etc., office chair needs to be tested by back fatigue testing machine in the process of production.
[0003] The existing back fatigue testing machine is repeatedly pushed and pressed to the chair back by driving mechanism and push block during work, to test the chair back fatigue degree, but the push block cannot be disassembled, and the push block is generally rectangular, so only the chair suitable for rectangular push block can be tested, and secondly, the surface of push block lacks protection mechanism, so it is easy to cause damage to the pressing surface of chair back during repeated pushing and pressing, so that subsequent use is impossible, therefore, we provide a kind of office chair back fatigue testing machine. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a kind of office chair back fatigue testing machine to solve the problems raised in the above background.
[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of office chair back fatigue testing machine, including base and arc push plate, the left side of the top of base is fixedly connected with vertical plate, the left side of vertical plate is fixedly connected with electric slide rail, the inner wall of electric slide rail is slidably connected with sliding table, and the one end of sliding table is fixedly connected with bearing plate, the left side of bearing plate bottom is fixedly connected with fixed plate, the side of fixed plate is fixedly connected with electric telescopic rod, the one end of electric telescopic rod is fixedly connected with clamping block, the one end of arc push plate is fixedly connected with clamping column, clamping column and clamping block are fixedly connected by bolt, and the right side of arc push plate is bonded with protection pad.
[0006] Using the above scheme, the electric slide rail moves the slide table with the cooperation of various components. The slide table raises and lowers the load-bearing plate, which in turn raises and lowers the fixed plate and the electric telescopic rod. The electric telescopic rod, with the cooperation of various components, moves the arc-shaped push plate until it is at the center of the chair back, at which point the movement stops. The height of the arc-shaped push plate can be adjusted, improving the applicability of the device. (Since the locking column and locking block are fixedly connected by bolts, the arc-shaped push plate can be quickly disassembled and assembled on the locking block, allowing for the replacement of arc-shaped push plates of different shapes and specifications, thus expanding the range of applications of the device.)
[0007] In a preferred embodiment of an office chair back fatigue testing machine, a limiting plate is fixedly connected to the right side of the top of the base, and the limiting plate is rectangular in shape.
[0008] By using the above solution, the seat in the test is blocked by the setting of the limiting plate to prevent excessive thrust from causing the seat to shift position.
[0009] In a preferred embodiment of an office chair back fatigue testing machine, a forward and reverse threaded rod is rotatably connected to the right side of the inner cavity of the base. Threaded sleeves are threaded to both sides of the surface of the forward and reverse threaded rod. A fixing post is fixedly connected to the top of the threaded sleeve. An L-shaped clamp is fixedly connected to the top of the fixing post. A turntable is fixedly connected to one end of the forward and reverse threaded rod, located outside the base.
[0010] Using the above method, the seat to be tested is placed inside the two L-shaped clamps. Then, the handle on the turntable is held and rotated. The handle drives the turntable to rotate, which in turn drives the forward and reverse threaded rods to rotate. Because the surface of the forward and reverse threaded rods has threads at both ends opposite, when the forward and reverse threaded rods are rotating, they can drive the two threaded sleeves to move towards each other. The threaded sleeves drive the fixed column to move, and the fixed column drives the L-shaped clamps to move until the inner side of the L-shaped clamps is in contact with the seat and the movement stops. This achieves the purpose of clamping and prevents the seat from shifting during the test, greatly improving the stability of the seat during the test.
[0011] In a preferred embodiment of an office chair back fatigue testing machine, one end of the forward and reverse threaded rod is movably connected to a bearing, and one side of the bearing is fixedly connected to one side of the base cavity.
[0012] By adopting the above solution and setting the bearing, one end of the forward and reverse threaded rod is prevented from being suspended in the air, thus preventing vibration.
[0013] In a preferred embodiment of an office chair back fatigue testing machine, a groove is provided at the bottom of the inner cavity of the base, and a slider is fixedly connected to the bottom of the threaded sleeve, with the bottom of the slider slidably connected to the inner wall of the groove.
[0014] By adopting the above scheme, the slider is limited by the setting of the slide groove, which assists the threaded sleeve in moving and improves the stability of the threaded sleeve when moving.
[0015] In a preferred embodiment of an office chair back fatigue testing machine, a power supply box is fixedly connected to the left side of the top of the base, and the inner cavity of the power supply box is equipped with a storage battery.
[0016] By adopting the above solution, the electrical equipment is powered by a storage battery to maintain its normal operation.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. This utility model uses an electric slide rail to move a sliding table in coordination with various components. The sliding table then moves a load-bearing plate up and down, which in turn moves a fixed plate and an electric telescopic rod up and down. The electric telescopic rod, in coordination with various components, moves an arc-shaped push plate until it is at the center of the chair back, at which point the movement stops. The height of the arc-shaped push plate can be adjusted, improving the applicability of the device. (Because the locking column and locking block are fixedly connected by bolts, the arc-shaped push plate can be quickly disassembled and assembled on the locking block, allowing for the replacement of arc-shaped push plates of different shapes and specifications, thus expanding the range of applications of the device.)
[0019] 2. Due to the characteristics of the protective pad, this utility model can reduce the direct contact between the arc-shaped push plate and the seat pressing surface, thereby reducing wear and preventing damage to the seat contact surface during long-term testing. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a second-view schematic diagram of the electric telescopic pole of this utility model;
[0022] Figure 3 This is a cross-sectional view of the base of this utility model.
[0023] In the diagram: 1. Base; 2. Vertical plate; 3. Electric slide rail; 4. Load-bearing plate; 5. Fixing plate; 6. Electric telescopic rod; 7. Clip-on block; 8. Arc-shaped push plate; 9. Protective pad; 10. Bolt; 11. Forward and reverse threaded rod; 12. Turntable; 13. Threaded sleeve; 14. L-shaped clamp; 15. Limiting plate; 16. Fixing column; 17. Clip-on column. Detailed Implementation
[0024] Please see Figures 1-3 An office chair back fatigue testing machine includes a base 1 and an arc-shaped push plate 8, see Figure 3 As shown, a reversible threaded rod 11 is rotatably connected to the right side of the inner cavity of the base 1. Threaded sleeves 13 are threaded onto both sides of the surface of the reversible threaded rod 11. A fixing post 16 is fixedly connected to the top of the threaded sleeve 13, and an L-shaped clamping plate 14 is fixedly connected to the top of the fixing post 16. A turntable 12 is fixedly connected to one end of the reversible threaded rod 11, located outside the base 1. The seat to be tested is placed inside the two L-shaped clamping plates 14. Then, the handle on the turntable 12 is gripped and rotated. The handle drives the turntable 12 to rotate, which in turn drives the reversible threaded rod 11 to rotate. Because the surface of the reversible threaded rod 11 has threads with opposite ends, when the reversible threaded rod 11 is rotating, it drives the two threaded sleeves 13 to move towards each other. The threaded sleeves 13 then drive the fixing post 16 to rotate. The movement is achieved by moving the L-shaped clamping plate 14 via the fixed column 16 until the inner side of the L-shaped clamping plate 14 is in contact with the seat, thus stopping the movement and achieving the purpose of clamping, preventing the seat from shifting during the test, and greatly improving the stability of the seat during the test. A vertical plate 2 is fixedly connected to the top left side of the base 1, and an electric slide rail 3 is fixedly connected to the left side of the vertical plate 2. A slide table is slidably connected to the inner wall of the electric slide rail 3, and a load-bearing plate 4 is fixedly connected to one end of the slide table. A fixed plate 5 is fixedly connected to the bottom left side of the load-bearing plate 4, and an electric telescopic rod 6 is fixedly connected to one side of the fixed plate 5. A locking block 7 is fixedly connected to one end of the electric telescopic rod 6, and a locking column 17 is fixedly connected to one end of the arc-shaped push plate 8. The locking column 17 and the locking block 7 are fixedly connected by bolts 10. A protective pad 9 is adhered to the right side of the arc-shaped push plate 8. See Figure 1 As shown, a power supply box is fixedly connected to the top left side of the base 1, and the inner cavity of the power supply box is equipped with a battery. The battery supplies power to the electrical equipment to maintain its normal operation. The electric slide rail 3 moves the slide table with the cooperation of various components. The slide table moves the load-bearing plate 4 up and down. The load-bearing plate 4 moves the fixed plate 5 and the electric telescopic rod 6 up and down. The electric telescopic rod 6 moves the arc-shaped push plate 8 with the cooperation of various components until the arc-shaped push plate 8 is in the center of the chair back and then stops. The height of the arc-shaped push plate 8 can be adjusted, which improves the applicability of the device. Since the snap-fit column 17 and the snap-fit block 7 are fixedly connected by bolts 10, the arc-shaped push plate 8 can be quickly installed and removed from the snap-fit block 7, so that arc-shaped push plates 8 of different shapes and specifications can be replaced, thus expanding the application range of the device.
[0025] See Figure 1As shown, a limiting plate 15 is fixedly connected to the top right side of the base 1. The limiting plate 15 is rectangular in shape. By setting the limiting plate 15, the seat under test is shielded to prevent excessive thrust from causing the seat to shift position. Figure 3 As shown, a bearing is movably connected to one end of the reversible threaded rod 11, and one side of the bearing is fixedly connected to one side of the inner cavity of the base 1. The bearing prevents one end of the reversible threaded rod 11 from being suspended in the air, thus preventing vibration. Figure 3 As shown, a sliding groove is provided at the bottom of the inner cavity of the base 1, and a slider is fixedly connected to the bottom of the threaded sleeve 13. The bottom of the slider is slidably connected to the inner wall of the sliding groove. The sliding groove limits the slider and assists the threaded sleeve 13 in moving, thereby improving the stability of the threaded sleeve 13 when it moves.
[0026] In use, first place the seat to be tested inside the two L-shaped clamps 14. Then, grasp the handle on the turntable 12 and rotate it. The handle drives the turntable 12 to rotate, which in turn drives the forward and reverse threaded rod 11 to rotate. Because the surface of the forward and reverse threaded rod 11 has threads with opposite ends, when the forward and reverse threaded rod 11 is rotating, it drives the two threaded sleeves 13 to move towards each other. The threaded sleeves 13 drive the fixed post 16 to move, and the fixed post 16 drives the L-shaped clamps 14 to move until the inner side of the L-shaped clamps 14 is in contact with the seat and the movement stops. This achieves the purpose of clamping and prevents the seat from shifting during the test, greatly improving the stability of the seat during the test. Next, start the electric slide rail 3. The drive mechanism inside the electric slide rail 3 drives the lead screw to rotate, which drives the slide table to rise and fall. The slide table drives the load-bearing plate 4 to rise and fall, and the load-bearing plate 4 drives the fixed plate 5 and the electric telescopic rod 6 to rise and fall. With the cooperation of various components, the electric telescopic rod 6 drives the arc-shaped push plate 8 to move until it is at the center of the chair back, at which point the movement stops. The height of the arc-shaped push plate 8 can be adjusted, improving the applicability of the device (since the locking post 17 and the locking block 7 are fixedly connected by bolts 10, the arc-shaped push plate 8 can be quickly disassembled and assembled on the locking block 7, allowing for the replacement of arc-shaped push plates 8 of different shapes and specifications, thus expanding the range of applications of the device). In subsequent experiments, the electric telescopic rod 6 drives the locking block 7 to move laterally, which in turn drives the locking post 17 to move laterally, which in turn drives the arc-shaped push plate 8 to move laterally. The arc-shaped push plate 8 then pushes the chair back. After each push, the arc-shaped push plate 8 is reset. This process is repeated to achieve the purpose of backrest fatigue testing. At the same time, due to the characteristics of the protective pad 9, the direct contact between the arc-shaped push plate 8 and the seat pressing surface can be reduced, thereby reducing wear and preventing damage to the seat contact surface during long-term testing.
Claims
1. An office chair pullback fatigue tester characterized by: The utility model relates to a kind of arc-shaped push plate and base, the base (1) top left side is fixedly connected with vertical plate (2), the left side of vertical plate (2) is fixedly connected with electric slide rail (3), the inner wall of electric slide rail (3) is slidably connected with slide table, and the one end of slide table is fixedly connected with bearing plate (4), the left side of bearing plate (4) bottom is fixedly connected with fixed plate (5), the side of fixed plate (5) is fixedly connected with electric telescopic rod (6), the one end of electric telescopic rod (6) is fixedly connected with clamping block (7), the one end of arc-shaped push plate (8) is fixedly connected with clamping column (17), clamping column (17) and clamping block (7) are fixedly connected by bolt (10), the right side of arc-shaped push plate (8) is bonded with protective pad (9).
2. The office chair pullback fatigue tester of claim 1, wherein: The right side of the top of the base (1) is fixedly connected with a limiting plate (15), which is rectangular in shape.
3. The office chair pullback fatigue tester of claim 1, wherein: The right side of the inner cavity of the base (1) is rotatably connected with a forward-reverse threaded rod (11), both sides of the surface of the forward-reverse threaded rod (11) are threadedly connected with a threaded sleeve (13), the top of the threaded sleeve (13) is fixedly connected with a fixed column (16), the top of the fixed column (16) is fixedly connected with an L-shaped clamping plate (14), and one end of the forward-reverse threaded rod (11) and outside the base (1) is fixedly connected with a turntable (12).
4. The office chair pullback fatigue tester of claim 3, wherein: One end of the forward-reverse threaded rod (11) is movably connected with a bearing, and one side of the bearing is fixedly connected to one side of the inner cavity of the base (1).
5. The office chair pullback fatigue tester of claim 3, wherein: The bottom of the inner cavity of the base (1) is provided with a sliding groove, the bottom of the threaded sleeve (13) is fixedly connected with a sliding block, and the bottom of the sliding block is slidably connected with the inner wall of the sliding groove.
6. The office chair pullback fatigue tester of claim 1, wherein: The left side of the top of the base (1) is fixedly connected with a power supply box, and the inner cavity of the power supply box is provided with a storage battery.