An office chair comprehensive testing machine

Abstract

The utility model discloses a kind of office chair comprehensive testing machines in the field of testing machine, the testing machine is base platform as base body, one end is equipped with support frame, the other end is configured with the office chair mounting plate of fixture assembly, for firm fixing office chair.Support frame part, upper panel and lower panel are stably connected by four columns, between two first columns, fixed first movable wheel is arranged, first movable plate is sleeved to the cylinder drive outside, and plate bottom is connected first test connector through fatigue sensor;Another two second columns are equipped with fixed support base plate, and second and third movable wheels are arranged below, second movable plate is sleeved to the motor screw drive outside of support base plate, and plate side is connected second test connector through strength sensor.Adjustable height fourth movable wheel is arranged between upper panel and support base plate, fifth movable wheel is embedded in base platform, and located between office chair mounting plate and support frame.The testing machine can flexibly switch test mode, respectively implement fatigue and strength test to office chair back and armrest part, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of testing machine technology, specifically to a comprehensive testing machine for office chairs. Background Technology

[0002] With the diversification of modern office environments, office chairs, as frequently used furniture, directly impact user health and safety through their structural safety and durability. Office chairs endure dynamic loads from leaning, changing postures, and frequent sitting and standing, especially the backrest and armrests, which are prone to deformation or fatigue damage due to repeated stress. Substandard product quality can lead to safety hazards such as chair breakage and tipping over, potentially causing injury to the user. Therefore, systematic testing of key office chair components (such as the backrest and armrests) to verify their fatigue life and ultimate load-bearing capacity under simulated real-world usage scenarios has become a necessary part of quality control in the furniture industry.

[0003] However, existing office chair testing equipment generally suffers from technical bottlenecks such as limited functionality and low testing efficiency. Traditional testing machines can typically only perform single-performance (such as fatigue or strength) tests on a single component (such as the chair back or armrest). This isolated testing mode not only leads to lengthy testing cycles and low testing efficiency, but also keeps the equipment utilization rate at a low level for a long time. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a comprehensive testing machine for office chairs, which can effectively solve the technical problems of single function and low efficiency of current testing machines used for testing office chairs.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An office chair comprehensive testing machine includes a base platform and a support frame vertically fixed to one end of the base platform. An office chair mounting plate is provided at the end of the base platform away from the support frame, and the office chair mounting plate is equipped with clamping components for fixing the office chair.

[0007] The support frame is provided with a fixed upper panel and a lower panel at the top and bottom, respectively, and two first columns and two second columns are connected between the upper panel and the lower panel.

[0008] A fixed first movable wheel is provided between the two first columns, and a first movable plate is sleeved on the outside of the two first columns and located above the first movable wheel. The first movable plate is driven by a cylinder to move along the axial direction of the first column, and a first test connector is connected to the bottom of the first movable plate through a fatigue sensor.

[0009] A fixed support base plate is fitted on the outer side of the two second columns. A fixed second movable wheel and a third movable wheel are arranged between the two second columns. The second movable wheel and the third movable wheel are located below the support base plate. A second movable plate is fitted on the outer side of the two second columns and is located above the second movable wheel. The second movable plate is controlled by a ball screw driven by a top motor, so that the second movable plate moves along the axis of the second column. A second test connector is connected to one side of the second movable plate through a strength sensor.

[0010] Both the first and second test connectors are connected to detachable traction straps.

[0011] Two third columns are connected between the upper panel and the supporting base plate. An adjustable fourth movable wheel is provided between the two third columns, and the fourth movable wheel is located above the third movable wheel.

[0012] The base platform is equipped with a fifth movable wheel, which is located between the office chair mounting plate and the support frame.

[0013] Furthermore, the clamping assembly consists of a first clamping plate, a second clamping plate, and a blocking plate. The first clamping plate is used to fix the bottom of the office chair to the office chair mounting plate. The second clamping plate is used to clamp the back of the office chair. A third test connector is provided on the second clamping plate. The blocking plate is fixed to the office chair mounting plate to prevent the office chair from sliding towards one end of the support frame.

[0014] Furthermore, the first column is connected to the end of the base plate away from the office chair mounting plate, and the third column is connected to the end of the support base plate close to the office chair mounting plate.

[0015] Furthermore, the second movable plate is provided with a protruding connecting part, and the connecting part is provided with a nut that passes through and cooperates with the ball screw. The second movable plate is also provided with several protruding guide parts that are sleeved on the outside of the second column for movement.

[0016] Furthermore, the first, second, and third movable wheels are horizontally aligned, and the fifth movable wheel is positioned below the first and second movable wheels.

[0017] Furthermore, a human-machine interface is provided on one side of the support frame.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The office chair comprehensive testing machine provided by this utility model, through reasonable structural design, can flexibly switch testing modes to conduct fatigue tests and strength tests on the back and armrests of the office chair, which not only improves the performance of the testing machine, but also increases the efficiency of the test. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model embodiment from the left side;

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model embodiment from the right side.

[0022] Figure 3 This is a schematic diagram of the connection of the traction belt for fatigue testing of the back of an office chair, according to an embodiment of this utility model.

[0023] Figure 4 This is a schematic diagram of the traction belt connection for testing the backrest strength of an office chair according to an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the horizontal connection of the traction belt for fatigue testing of the armrest of an office chair according to an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the vertical connection of the traction belt for fatigue testing of the armrest of an office chair according to an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the horizontal connection of the traction belt for strength testing of the armrest of an office chair according to an embodiment of this utility model;

[0027] Figure 8 This is a schematic diagram of the vertical connection of the traction belt for strength testing of the armrest of an office chair according to an embodiment of this utility model;

[0028] Numbering on the map:

[0029] 1-Base platform, 2-Support frame, 3-Office chair mounting plate, 4-Clamping assembly, 5-Top panel, 6-Lower panel, 7-First column, 8-Second column, 9-First movable wheel, 10-Cylinder, 11-Fatigue sensor, 12-First test connector, 13-Support base plate, 14-Second movable wheel, 15-Third movable wheel, 16-Second movable plate, 17-Top motor, 18-Ball screw, 19-Strength sensor, 20-Second test connector, 21-Traction belt, 22-Third column, 23-Fourth movable wheel, 24-Fifth movable wheel, 25-Third test connector, 26-First movable plate;

[0030] 401 - First clamping plate, 402 - Second clamping plate, 403 - Blocking plate;

[0031] 1601 - Connecting part, 1602 - Nut, 1603 - Guide part. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figure 1-2 As shown, this utility model provides an office chair comprehensive testing machine. The office chair comprehensive testing machine mainly consists of a base platform 1 and a support frame 2 vertically fixed to one end of the base platform 1, forming a basic frame. An office chair mounting plate 3 is provided at the end of the base platform 1 away from the support frame 2. The office chair mounting plate 3 is equipped with a clamp assembly 4 for firmly fixing the office chair to the testing machine.

[0034] The clamp assembly 4 consists of a first clamping plate 401, a second clamping plate 402, and a blocking plate 403. The first clamping plate 401 is used to fix the bottom of the office chair to the office chair mounting plate 3 to ensure the stability of the office chair during the test; the second clamping plate 402 is used to clamp the back of the office chair, and a third test connector 25 is provided on the second clamping plate 402 to connect the traction strap 21 during the back test; the blocking plate 403 is fixed to the office chair mounting plate 3 to prevent the office chair from sliding towards the support frame 2 during the test, ensuring the accuracy of the test.

[0035] The support frame 2 is provided with an upper panel 5 and a lower panel 6 at its top and bottom, respectively. The upper panel 5 and the lower panel 6 are connected by two first columns 7 and two second columns 8 to provide support and guidance for subsequent moving parts.

[0036] A fixed first movable wheel 9 is provided between the two first columns 7, and a first movable plate 26 that can move above the first movable wheel 9 is sleeved on the outer side of the two first columns 7. The first movable plate 26 is driven by a cylinder 10 and can repeatedly move up and down along the axial direction of the first column 7. The bottom of the first movable plate 26 is connected to a first test connector 12 through a fatigue sensor 11 for measuring and recording relevant data during fatigue testing.

[0037] A fixed support base plate 13 is fitted around the outer sides of the two second columns 8. A fixed second movable wheel 14 and a third movable wheel 15 are positioned between the two second columns 8, and the second movable wheel 14 and the third movable wheel 15 are located below the support base plate 13. A second movable plate 16, movable above the second movable wheel 14, is also fitted around the outer sides of the two second columns 8. A second test connector 20 is connected to one side of the second movable plate 16 via a strength sensor 19. The second movable plate 16 is controlled by a ball screw 18 driven by a top motor 17, allowing the second movable plate 16 to move upwards or downwards along the axial direction of the second columns 8.

[0038] Two third columns 22 connect the upper panel 5 to the supporting base plate 13. An adjustable fourth movable wheel 23 is positioned between the two third columns 22. The fourth movable wheel 23 can be adjusted and fixed using screws or other locking devices. The fourth movable wheel 23 is located above the third movable wheel 15. By adjusting the height of the fourth movable wheel 23, the testing needs of office chair armrests of different sizes and shapes can be accommodated.

[0039] The base platform 1 is equipped with a fifth movable wheel 24, which is located between the office chair mounting plate 3 and the support frame 2. It is used to change the direction of the traction belt 21 so that the test process is more in line with the actual stress conditions.

[0040] To better support the test, the first column 7 is connected to the end of the base plate 6 away from the office chair mounting plate 3, and the third column 22 is connected to the end of the support base plate 13 close to the office chair mounting plate 3. This layout makes the structure of the entire testing machine more reasonable, the force between the components more even, and improves the stability and reliability of the testing machine.

[0041] The second movable plate 16 is provided with a protruding connecting part 1601. The connecting part 1601 has a nut 1602 that passes through and cooperates with the ball screw 18. Through the cooperation of the ball screw 18 and the nut 1602, the top motor 17 drives and controls the second movable plate 16. At the same time, the second movable plate 16 is also provided with several protruding guide parts 1603 that are sleeved on the outside of the second column 8 for movement. The guide parts 1603 can ensure the straightness and stability of the second movable plate 16 during movement, reduce movement deviation, and improve test accuracy.

[0042] The first movable wheel 9, the second movable wheel 14, and the third movable wheel 15 are horizontally aligned. This alignment ensures that the traction belt 21 maintains a relatively stable running state when passing through these wheels, reducing additional friction and stress concentration caused by belt misalignment and ensuring the accuracy of test data. The fifth movable wheel 24 is positioned below the first and second movable wheels 14. By appropriately adjusting the distance of the fifth movable wheel 24, the force angle and direction of the office chair armrests during actual use can be better simulated.

[0043] In addition, a human-machine interface 26 is provided on one side of the support frame 2. Operators can easily set test parameters, such as the magnitude of the test force, the number of applications, and the test speed, and monitor various data and statuses during the test in real time through the human-machine interface 26. The human-machine interface 26 also has data storage and analysis functions, which can record and organize test data, generate detailed test reports, and provide strong support for the quality assessment and improvement of the office chair.

[0044] This office chair comprehensive testing machine can perform tests in the following ways:

[0045] Back fatigue test: such as Figure 3 As shown, when fatigue testing of the office chair back is required, the position of the office chair is adjusted so that the back is close to the support frame 2. One end of the traction belt 21 is connected to the third test connector 25 on the second clamping plate 402, and the other end passes through the fifth movable wheel 24 and the first movable wheel 9 in sequence before connecting to the first test connector 12 on the fatigue sensor 11. The cylinder 10 is activated to control the first movable plate 26 to repeatedly rise and fall, so that the traction belt 21 applies periodic tension to the office chair back, simulating the repeated forces exerted on the back of the office chair during daily use. The fatigue sensor 11 records data in real time during the test, such as the magnitude of the tension and the number of applications, for subsequent analysis of the fatigue performance of the office chair back.

[0046] Back strength test: such as Figure 4 As shown, when a strength test is required on the back of the office chair, the chair is adjusted so that the back is close to the support frame 2. One end of the traction belt 21 is connected to the third test connector 25, and the other end passes through the fifth movable wheel 24 and the second movable wheel 14 before connecting to the second test connector 20 on the strength sensor 19. The top motor 17 is started, and the ball screw 18 is rotated to raise the second movable plate 16, causing the traction belt 21 to apply an upward pulling force to the back of the office chair. The pulling force is gradually increased until the back of the office chair is damaged or the predetermined strength test standard is reached. The strength sensor 19 records the maximum pulling force value during the test to evaluate the strength performance of the office chair back.

[0047] Handrail fatigue test: such as Figure 5-6As shown, when fatigue testing of the office chair armrests is required, adjust the position of the office chair so that the armrests are close to the support frame 2, and tie one end of the traction strap 21 to the armrests of the office chair. Specifically, the fatigue test includes two methods: horizontal direction testing and vertical direction testing. When using... Figure 5 The structure shown for the horizontal test involves the traction belt 21 passing sequentially through the fourth movable wheel 23, the third movable wheel 15, and the first movable wheel 9 before connecting to the first test connector 12 on the fatigue sensor 11; when using... Figure 6 The structure shown for the vertical test involves adjusting the position of the fifth movable wheel 24. The other end of the traction belt 21 passes sequentially through the fifth movable wheel 24 and the first movable wheel 9 before connecting to the first test connector 12 on the fatigue sensor 11. Similarly, the cylinder 10 is activated to control the first movable plate 26 to repeatedly rise and fall, causing the traction belt 21 to apply a periodic pulling force to the handrail, simulating the repetitive forces experienced by the handrail during daily use. The fatigue sensor 11 records the test data and analyzes the fatigue performance of the handrail.

[0048] Handrail strength test: such as Figure 7-8 As shown, when a strength test is required on the armrests of the office chair, adjust the position of the office chair so that the armrests are close to the support frame 2, and tie one end of the traction strap 21 to the armrests. Specifically, the strength test includes two methods: horizontal direction testing and vertical direction testing. When using... Figure 7 The structure shown for the horizontal test has the other end of the traction belt connected to the second test connector 20 on the strength sensor 19 after passing through the fourth movable wheel 23, the third movable wheel 15, and the second movable wheel 14 in sequence; when using... Figure 8 The structure for the vertical test is shown. The position of the fifth movable wheel 24 is adjusted, and the other end of the traction belt 21 passes sequentially through the fifth movable wheel 24 and the second movable wheel 14 before connecting to the second test connector 20 on the strength sensor 19. The top motor 17 is started, and the ball screw 18 is rotated, causing the second movable plate 16 to rise. An upward pulling force is applied to the handrail via the traction belt 21, gradually increasing the force until damage occurs or the predetermined strength test standard is reached. The strength sensor 19 records the maximum pulling force value to evaluate the strength performance of the handrail.

[0049] Compared with traditional technologies, the office chair comprehensive testing machine provided by this technical solution, through reasonable structural design, can flexibly switch testing modes to conduct fatigue tests and strength tests on the back and armrests of the office chair respectively, thereby improving the performance of the testing machine and increasing testing efficiency.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An office chair comprehensive testing machine, comprising a base platform and a support frame vertically fixed to one end of the base platform, characterized in that: The base platform is provided with an office chair mounting plate at one end away from the support frame, and the office chair mounting plate is equipped with a clamp assembly for fixing the office chair. The support frame is provided with a fixed upper panel and a lower panel at the top and bottom, respectively, and two first columns and two second columns are connected between the upper panel and the lower panel. A fixed first movable wheel is provided between the two first columns, and a first movable plate is sleeved on the outside of the two first columns and located above the first movable wheel. The first movable plate is driven by a cylinder to move along the axial direction of the first column, and a first test connector is connected to the bottom of the first movable plate through a fatigue sensor. A fixed support base plate is fitted on the outer side of the two second columns. A fixed second movable wheel and a third movable wheel are arranged between the two second columns. The second movable wheel and the third movable wheel are located below the support base plate. A second movable plate is fitted on the outer side of the two second columns and is located above the second movable wheel. The second movable plate is controlled by a ball screw driven by a top motor, so that the second movable plate moves along the axis of the second column. A second test connector is connected to one side of the second movable plate through a strength sensor. Both the first test connector and the second test connector are connected to a detachable traction strap; Two third columns are connected between the upper panel and the supporting base plate, and an adjustable fourth movable wheel is provided between the two third columns, with the fourth movable wheel located above the third movable wheel; The base platform is equipped with a fifth movable wheel, which is located between the office chair mounting plate and the support frame.

2. The office chair comprehensive testing machine according to claim 1, characterized in that: The clamping assembly consists of a first clamping plate, a second clamping plate, and a blocking plate. The first clamping plate is used to fix the bottom of the office chair to the office chair mounting plate. The second clamping plate is used to clamp the back of the office chair. A third test connector is provided on the second clamping plate. The blocking plate is fixed to the office chair mounting plate to prevent the office chair from sliding towards one end of the support frame.

3. The office chair comprehensive testing machine according to claim 1, characterized in that: The first column is connected to the end of the base plate away from the office chair mounting plate, and the third column is connected to the end of the support base plate close to the office chair mounting plate.

4. The office chair comprehensive testing machine according to claim 1, characterized in that: The second movable plate is provided with a protruding connecting part, and the connecting part is provided with a nut that passes through and cooperates with the ball screw. The second movable plate is also provided with several protruding guide parts that are sleeved on the outside of the second column and move.

5. The office chair comprehensive testing machine according to claim 1, characterized in that: The first, second, and third movable wheels are horizontally aligned, and the fifth movable wheel is positioned below the first and second movable wheels.

6. An office chair comprehensive testing machine according to any one of claims 1-5, characterized in that: A human-machine interface is provided on one side of the support frame.

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