Seat testing device

Abstract

The utility model belongs to the technical field of quality detection, and particularly relates to a seat testing device which comprises a base, an adjusting seat in sliding connection with the base, a first testing unit which is in sliding connection with the base and is used for testing a seat surface, and a second testing unit which is in sliding connection with the adjusting seat and is used for testing a seat back, the inclination angle of the second test unit can be changed by adjusting the relative position between the adjusting seat and the base. The beneficial effects of the utility model are that the adjusting seat and the second slide block which slide relative to each other are arranged, so that the moving route of the second pressurizing plate is arc-shaped, the seat is more suitable for actual use, and the accuracy and reliability of a test result are further ensured; by controlling the pressure values and speeds of the two pressurizing plates, data statistics and analysis can be tested and recorded; through mutual cooperation of the two groups of guide rails, the first slide block can be rapidly moved to a test position.

Description

Technical Field

[0001] This utility model belongs to the field of quality inspection technology, and in particular relates to a seat testing device. Background Technology

[0002] To ensure that the seats manufactured by the company meet national standards, it is usually necessary to conduct durability and stability tests on the finished seats. These tests mainly include fatigue and strength tests on the seat surface, backrest, and armrests. The performance of the seats is required not only in static load tests but also in dynamic load tests, where they must withstand multiple back-and-forth impacts without loosening or deforming. This is to assess the durability and stability of the seats during long-term use, better meet the requirements for the lifespan and safety factor of the seats, and provide important data and guidance for product design, improvement, and quality control.

[0003] In the medical field, healthcare professionals frequently need to adjust the backrest angle and seat height of chairs to improve patient comfort and thus increase diagnostic and treatment efficiency. Therefore, during testing, it's necessary to simulate different patient postures and movements in the chair to assess whether any loosening or damage may occur during use, ensuring safe operation.

[0004] Existing seat testing devices mostly perform static load tests, applying pressure to the seat surface and backrest separately through test units mounted on a frame. Typically, the seat surface test unit is vertically mounted on the top of the frame, while the backrest test unit is rotatably mounted on the side of the frame. When testing backrests at different angles, the backrest test unit needs to be rotated to align with the backrest. However, the movement paths of the two devices are not matched. After rotating the backrest test unit at the same angle, it is difficult to make it completely fit against the test surface of the backrest, resulting in low test accuracy and failing to meet practical needs. Therefore, a new seat testing device is needed to solve the above technical problems. Utility Model Content

[0005] The problem this invention aims to solve is to provide a seat testing device that has the advantages of simple and effective structure, convenient and quick testing operation, and accurate and reliable test results, which can ensure the quality of seats before they leave the factory and thus improve the pass rate of seat delivery.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a seat testing device, which can be used to test the backrest and seat surface of a seat, characterized in that: it includes a base, an adjustment seat slidably connected to the base, a first testing unit slidably connected to the base and used for testing the seat surface, and a second testing unit slidably connected to the adjustment seat and used for testing the backrest. Adjusting the relative position between the adjustment seat and the base can change the tilt angle of the second testing unit.

[0007] Furthermore, the two ends of the adjustment seat are slidably connected to the base through a set of second sliders. The two sets of second sliders are provided with arc-shaped grooves on their opposite sides. The adjustment seat can move along the arc-shaped grooves, thereby changing the tilt angle of the second test unit.

[0008] Furthermore, the end of the adjustment seat is provided with a protrusion, and the protrusion is provided with a first through hole that matches the arc-shaped groove. The lever passes through the first through hole and is inserted into the arc-shaped groove. Driving the lever can move the adjustment seat along the arc-shaped groove, thereby changing the tilt angle of the second test unit.

[0009] Furthermore, the second slider is connected to a lead screw, the two ends of which are connected to the base. Driving the lead screw can cause the second slider to move along the third slide rail on the base.

[0010] Furthermore, the slide rod passes through the second through hole on the second slider and its two ends are connected to the base, and the slide rod is arranged parallel to the lead screw.

[0011] Furthermore, the second test unit includes a second pressure plate that contacts the chair back, a second adjustment member that provides power for the movement of the second pressure plate, and a second fixed seat that connects the second adjustment member to the adjustment seat, wherein the second fixed seat is slidably connected to the adjustment seat.

[0012] Furthermore, the second fixed seat is slidably connected to the adjusting seat via a second slide rail.

[0013] Furthermore, the second adjusting component is a second cylinder, the output end of which is connected to the second pressure plate so that the second pressure plate contacts the chair back for testing.

[0014] Furthermore, the first test unit includes a first pressure plate that contacts the chair surface, a first slider that connects to the base, and a first adjusting member that connects the first slider to the first pressure plate. Driving the first slider can move the first pressure plate, and the first adjusting member provides power for the movement of the first pressure plate.

[0015] Furthermore, the base is equipped with a controller for controlling the first test unit and the second test unit to perform tests and to perform data statistics and analysis.

[0016] By adopting the above technical solution, the adjustable seat and the second slider are set to slide against each other, so that the movement path of the second pressure plate is arc-shaped, which is more in line with the actual use of the seat and further ensures the accuracy and reliability of the test results. By controlling the pressure value and speed of the two pressure plates, data can be tested, recorded, statistically analyzed, and processed. Through the cooperation of the two sets of guide rails, the first slider can be moved quickly to the top of the seat surface test surface. The device can be flexibly adjusted according to the use position of the seat, and the adjustment range is more precise, and the degree of automation is improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0018] Figure 1 This is a front view of an embodiment provided by this utility model;

[0019] Figure 2 This is a left view of the second slider in an embodiment provided by this utility model;

[0020] Figure 3 This is a top view of an embodiment provided by this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the second test unit in the embodiment provided by this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the tilted second test unit in the embodiment provided by this utility model;

[0023] Figure 6 This refers to the relative position between the protrusion and the second slider when the lever moves in the embodiment provided by this utility model.

[0024] Figure 7 This is a top view of the second slider in an embodiment of this utility model.

[0025] The markings in the image are as follows:

[0026] 2. Base; 21. First test unit; 22. Second test unit; 23. Third slide rail; 24. First slide rail; 25. U-shaped support frame; 26. Support column; 27. Fifth slide rail; 211. First pressure plate; 212. First adjusting component; 213. First slider; 221. Second pressure plate; 222. Second adjusting component; 223. Second fixed seat; 3. Adjusting seat; 31. Protrusion; 32. First through hole; 33. Second slide rail; 4. Second slider; 41. Arc groove; 42. Lead screw; 43. Slide rod; 44. Second through hole; 45. Ear plate; 46. Upper fixed plate; 47. Lower fixed plate; 5. Lever. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only partial structures relevant to the present invention, not the complete structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection of the internal structures of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] This application does not limit the specific structure of the base 2, as long as it can stably support the movement of the entire device. Static fatigue testing here refers to the fatigue performance of the material under static load, while dynamic fatigue testing refers to the fatigue performance of the material under cyclic load.

[0032] like Figure 1 As shown, this embodiment provides a seat testing device that can be used to contact and test the backrest, seat surface, and armrests of a seat, including not only dynamic fatigue testing but also static fatigue testing.

[0033] The aforementioned testing device includes a base 2, an adjusting seat 3 movably connected to the base, a first testing unit 21 movably connected to the base 2 for testing the chair surface, and a second testing unit 22 slidably connected to the adjusting seat 3 for testing the chair back 12. Adjusting the relative position of the adjusting seat 3 and the base 2 changes the tilt angle of the second testing unit 22. In the technical solution of this application, it is no longer necessary to rotate the second testing unit 22 separately to align it with the testing surface on the chair back. Instead, the adjusting seat 3 drives the second testing unit 22 to move, ensuring that it always fits the testing surface, thereby guaranteeing the accuracy of the test results.

[0034] Preferably, the tilt angle matches the adjustment path of the chair back. In this embodiment, such as... Figure 6 As shown, the lever 5 drives the protrusion 31 to make a curved motion, which in turn drives the adjustment seat 3 to make a curved motion. This curved motion matches the structure of the arc groove 41, which is more in line with the actual adjustment path of the chair back. This allows the second pressure plate 221 of the second test unit 22 to quickly fit into the test surface of the chair back for testing, thus improving testing efficiency.

[0035] Preferably, the two ends of the adjusting seat 3 are slidably connected to the base 2 via a set of second sliders 4. The sides of the two sets of second sliders 4 are provided with arc-shaped grooves 41, and the adjusting seat 3 can move along the arc-shaped grooves 41, thereby changing the tilt angle of the second test unit 22. In use, the moving path of the adjusting seat 3 is arc-shaped, so that the relative position between the adjusting seat 3 and the base 2 changes. Specifically, the adjusting seat 3 is misaligned and tilted relative to the base 2 to a certain extent, which drives the movement and tilting of the second test unit 22 set on the adjusting seat 3, making it more in line with the actual adjustment angle of the chair back. This ensures that the second test unit 22 can quickly fit the test surface during testing, making it more efficient and accurate.

[0036] Since different types of seats have different angles between the backrest and the seat surface, their adjustable range of backrest also varies. The technical solution of this application only requires matching the curvature of the arc groove with the actual adjustment path of the backrest, making it applicable to testing more types of seats. In actual operation, it can be achieved simply by replacing the second slider 4 with different arc grooves, making it more widely applicable and easier to maintain and repair later.

[0037] Preferably, the end of the adjusting seat 3 is provided with a protrusion 31, and the protrusion 31 is provided with a first through hole 32 that matches the arc-shaped groove 41. The lever 5 passes through the first through hole 32 and is inserted into the arc-shaped groove 41. Driving the lever 5 can drive the adjusting seat 3 to move along the arc-shaped groove 41, thereby changing the tilt angle of the second test unit 22. In this embodiment, both sides of the adjusting seat 3 are connected to the second slider 4 through the protrusion 31. The lever 5 and the protrusion 31 are fixed to each other by a limiting block so that they can move simultaneously. That is, driving the lever 5 will drive the protrusion 31 to move together, thereby driving the adjusting seat 3 connected to the protrusion 31 to move. The arc-shaped groove 41 here can be as follows: Figure 2 The angle of the arc shown can be flexibly changed according to the actual adjustment angle, without specific limitations, as long as the same function can be achieved.

[0038] Preferred, such as Figure 2 As shown, the second slider 4 is connected to the lead screw 42, and the two ends of the lead screw 42 are connected to the base 2. The drive lead screw 43 can drive the second slider 4 to move along the third slide rail 23 on the base 2.

[0039] Preferably, the slide rod 43 passes through the second through hole 44 on the second slider 4 and its two ends are connected to the base 2. The slide rod 43 is arranged parallel to the lead screw 42. In this embodiment, as shown... Figure 2 and Figure 7 As shown, the second slider 4 is located near the side of the seat. Figure 2 The left side (shown in the diagram) is provided with an ear plate 45. A lead screw 43 passes through the ear plate 45 and is threadedly connected to it. Driving the lead screw 43 to rotate causes the ear plate 45 and the second slider 4 to move together along the length of the slide rod 43. Simultaneously, the second slider 4 is also slidably connected to the third slide rail 23. The cooperation between the third slide rail 23 and the slide rod 43 makes the up-and-down movement of the second slider 4 more stable and reliable, ensuring the maximum tight fit between the second test unit 22 and the test surface, preventing displacement and thus affecting the accuracy of the measurement results. The bottom of the lead screw 43 and the bottom of the slide rod 43 are connected to the same lower fixing plate 47, and the top is connected to the same upper fixing plate 46. Both the upper fixing plate 46 and the lower fixing plate 47 are connected to the support column 26.

[0040] Preferably, the lead screw 43, the slide bar 43, and the third slide rail 23 are all arranged in parallel.

[0041] Preferred, such as Figure 4As shown, the second testing unit 22 includes a second pressure plate 221 that contacts the chair back, a second adjusting member 222 that provides power for the movement of the second pressure plate 221, and a second fixed seat 223 that connects the second adjusting member 222 and the adjusting seat 3. The second fixed seat 223 is slidably connected to the adjusting seat 3. In this embodiment, the tilt angle of the second pressure plate 221 is changed by the mutual sliding of the adjusting seat 3 and the second slider 4, which is more in line with the actual use of the seat and ensures the stability of the second pressure plate 221 during the pressurization process. It always fits the test surface and does not shift, which helps to improve the accuracy of the measurement results.

[0042] Preferably, the second fixed seat 223 is slidably connected to the adjusting seat 3 via the second slide rail 33. In this embodiment, the top of the adjusting seat 3 is provided with the second slide rail 33. Driving the second fixed seat 223 allows it to move laterally along the second slide rail 33. The vertical movement of the second slider 4 adjusts the height of the second fixed seat 223 longitudinally. The two work together to quickly adjust the second test unit 22 to the test position.

[0043] Preferably, the second adjusting member 222 is a second cylinder, the output end of which is connected to the second pressure plate 222 so that the second pressure plate 222 contacts the chair back for testing. In use, the relative positions of the second slider 4 and the third slide rail 23, and the relative positions of the second fixed seat 223 and the second slide rail 33 are adjusted to achieve rough adjustment of the lateral and longitudinal positions of the second pressure plate 222, so that it approximately matches the direction of the chair back. Figure 4 and Figure 5 As shown, the lever 5 is then driven, causing the adjusting seat 3 to move along the arc groove 41 in a curved motion, thereby changing the relative position of the adjusting seat 3 and the support column 26. At the same time, the second pressure plate 222 is also driven to move in a curved motion, which can better fit the direction of the chair back. The second cylinder is driven to make the second pressure plate 222 contact the chair back for testing. The operation is convenient and quick, and the accuracy of the test results is improved.

[0044] Preferred, such as Figure 1 As shown, the first test unit 21 includes a first pressure plate 211 that contacts the seat surface, a first adjustment member 212 connected to the first pressure plate 211, and a first slider 213 connecting the first adjustment member 212 and the base 2. Driving the first slider 213 can move the first pressure plate 211, and the first adjustment member 212 provides power for the movement of the first pressure plate 211.

[0045] Preferably, the first adjusting member 212 is a first cylinder, and its output end is connected to the first slider 213.

[0046] Preferably, the first slider 213 is slidably connected to the fifth slide rail 27 via the first slide rail 24, and both the first slide rail 24 and the fifth slide rail 27 are connected to the base 2. In this embodiment, as... Figure 3 As shown, the base 2 includes a U-shaped support frame 25 at the top and multiple sets of support columns 26 arranged circumferentially along the bottom of the U-shaped support frame 25. The inner side of the U-shaped support frame 25 is provided with two sets of parallel fifth slide rails 27. The two ends of the first slide rail 24 symmetrically arranged at the bottom of the first slider 213 are respectively connected to a set of fifth slide rails 27, so that the first slide rail 24 can move along the length direction of the fifth slide rail 27, and the first slider 213 can be displaced along the length direction of the first slide rail 24. Through the cooperation of the two sets of slide rails, the lateral and longitudinal displacement of the first slider 213 is realized, so that the first pressure plate 211 is moved above the seat surface, driving the first cylinder 212 to extend the first pressure plate 211 and contact the test surface of the seat surface for testing.

[0047] Preferably, a first pressure sensor is provided on the first pressure plate 211 and a second pressure sensor is provided on the second pressure plate 221. The pressure value is detected by the pressure sensor, and the seat surface and backrest are repeatedly pressed a preset number of times to check whether the material properties are damaged, thereby completing the static fatigue test.

[0048] In another embodiment, the first pressure plate 211 is provided with a first pressure sensor and a first speed sensor, and the second pressure plate 221 is provided with a second pressure sensor and a second speed sensor. The pressure sensor detects the pressure value, and the speed sensor detects the movement speed. After repeatedly pressing the seat surface and backrest a preset number of times, the material properties are checked for damage, thereby completing the dynamic fatigue test.

[0049] The method using the seat testing device described above includes the following steps:

[0050] Connect the base 2 to the first test unit 21;

[0051] The base 2 is connected to the second test unit 22 via the adjusting seat 3;

[0052] The lever 5 passes through the first through hole 32 on the protrusion 31 and is inserted into the arc groove 41. Driving the lever 5 can move the adjusting seat 3 along the arc groove 41, thereby changing the tilt angle of the second test piece 22.

[0053] In use, first fix the seat position, then conduct a seat surface test. Adjust the horizontal and vertical positions of the first slider 213 and the height of the first pressure plate 211 so that the first pressure plate 211 covers the test surface of the seat. Then drive the first cylinder 212 to perform static and dynamic pressure tests at a certain frequency and pressure, and record multiple sets of test results and corresponding material changes.

[0054] Next, a backrest test is conducted. The height of the second slider 4, the position of the lever 5, and the position of the second fixing seat 223 are adjusted so that the second pressure plate 221 covers the test surface of the backrest. Then, the second cylinder is driven to perform static and dynamic pressure tests at a certain frequency and pressure, and multiple sets of test results and corresponding material changes are recorded. This simulated pressure action further ensures the accuracy and reliability of the test results. Here, it is necessary to control parameters such as the pressure and speed of the two pressure plates, and record, count, and analyze the number of pressure applications to detect the service life of the seat and complete the test.

[0055] Finally, the handrail test was conducted. After selecting the appropriate pressure plate, its position was adjusted and a pressure test was performed. This will not be repeated here.

[0056] Based on the above technical solution, the seat testing device disclosed in this application also includes a controller that is communicatively connected to both the first testing unit 21 and the second testing unit 22. This controller can control the testing units to perform tests and record, statistically analyze, and perform data collection. Specifically, the controller controls the extension and retraction of the first and second cylinders, thereby controlling the extension and retraction of the first pressure plate 211 and the second pressure plate 221. This allows the pressure plates to conform to the test surface and applies pressure at a certain frequency for dynamic testing. It also controls the pressure values ​​of the first and second pressure plates 211 and 221 pressing against the test surface for dynamic fatigue testing. By controlling the movement of the first slider 213, the second slider 4, and the second fixed seat 223, the positions of the first and second pressure plates 211 and 221 are precisely controlled. The controller enables automation of the entire device, providing flexible and efficient testing. It also allows for timely testing of newly manufactured or developed products, ensuring the quality of the seat products before they leave the factory.

[0057] In use, a PLC controls the solenoid valves to execute the parameters set by the operator for each test area and test content, sequentially testing the chair seat, backrest, and armrests, including both dynamic and static tests. The PLC central controller sends commands to two cylinders, which perform a squeezing action. When squeezing the product surface, the surface is compressed. Pressure sensors detect this compression within a set pressure range. After completing one action, the cylinders repeat the action according to the commands from the PLC central controller, or perform other prescribed actions. If the product is not damaged and its material properties are not compromised after a certain number of repetitions, the quality of the tested product meets the requirements.

[0058] The beneficial effects of this invention are as follows: the mutually sliding adjustment seat and the second slider make the movement path of the second pressure plate arc-shaped, which is more in line with the actual use of the chair and further ensures the accuracy and reliability of the test results; by controlling the pressure value and speed of the two pressure plates, data can be tested, recorded, statistically analyzed, and processed; through the cooperation of the two sets of guide rails, the first slider can be quickly moved above the test surface of the chair surface; the device can be flexibly adjusted according to the use position of the chair, and the adjustment range is more precise, and the degree of automation is improved.

[0059] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A seat testing device for testing the backrest and seat surface of a seat, characterized in that: It includes a base, an adjustment seat slidably connected to the base, a first test unit slidably connected to the base and used for testing the seat surface, and a second test unit slidably connected to the adjustment seat and used for testing the backrest. Adjusting the relative position between the adjustment seat and the base can change the tilt angle of the second test unit.

2. The seat testing device according to claim 1, characterized in that: The two ends of the adjustment seat are slidably connected to the base through a set of second sliders. The two sets of second sliders are provided with arc-shaped grooves on their opposite sides. The adjustment seat can move along the arc-shaped grooves, thereby changing the tilt angle of the second test unit.

3. The seat testing device according to claim 2, characterized in that: The end of the adjustment seat is provided with a protrusion, and the protrusion is provided with a first through hole that matches the arc-shaped groove. The lever passes through the first through hole and is inserted into the arc-shaped groove. Driving the lever can move the adjustment seat along the arc-shaped groove, thereby changing the tilt angle of the second test unit.

4. The seat testing device according to claim 2 or 3, characterized in that: The second slider is connected to a lead screw, the two ends of which are connected to the base. Driving the lead screw can cause the second slider to move along the third slide rail on the base.

5. The seat testing device according to claim 4, characterized in that: The slide rod passes through the second through hole on the second slider and its two ends are connected to the base. The slide rod is arranged parallel to the lead screw.

6. The seat testing device according to claim 5, characterized in that: The second test unit includes a second pressure plate that contacts the chair back, a second adjustment member that provides power for the movement of the second pressure plate, and a second fixed seat that connects the second adjustment member to the adjustment seat, wherein the second fixed seat is slidably connected to the adjustment seat.

7. The seat testing device according to claim 6, characterized in that: The second fixed seat is slidably connected to the adjusting seat via a second slide rail.

8. The seat testing apparatus according to claim 6 or 7, characterized in that: The second adjusting component is a second cylinder, the output end of which is connected to the second pressure plate so that the second pressure plate contacts the chair back for testing.

9. The seat testing device according to claim 8, characterized in that: The first test unit includes a first pressure plate that contacts the chair surface, a first slider that connects to the base, and a first adjustment member that connects the first slider to the first pressure plate. Driving the first slider can move the first pressure plate, and the first adjustment member provides power for the movement of the first pressure plate.

10. The seat testing apparatus according to any one of claims 1 to 3, 5 to 7, and 9, characterized in that: The base is equipped with a controller for controlling the first test unit and the second test unit to perform tests and to perform data statistics and analysis.

Images