A bending test device for heated seat cushions

Abstract

This utility model provides a bending test device for heated seat cushions, belonging to the field of testing tooling technology. It includes: a frame with a roller and a movable sliding seat; a linear drive element mounted on the frame and connected to the sliding seat; a tensioning element with a second connecting part for connecting to the other end of the heated seat cushion; a straight line A passing through the sliding seat and tangent to the roller and a straight line B passing through the tensioning element and tangent to the roller are not collinear; the sliding seat moves along straight line A, and the tensioning element moves along straight line B. The advantages of this utility model are: it provides a device capable of automatically testing the bending of heated seat cushions; the sliding seat and tensioning element can pull the heated seat cushion back and forth relative to the roller, thereby causing the heated seat cushion to be repeatedly squeezed by the roller to simulate a bending effect, achieving full automation and improving testing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of testing tooling technology and relates to a bending test device for a heated seat cushion. Background Technology

[0002] A heated seat cushion is a type of seat cushion placed on a chair that generates heat to warm the user's buttocks, lower back, and thighs when plugged in. Simply put, a heated seat cushion is a cushion with a built-in electric heating element. Heated seat cushions contain heating elements (carbon fiber / metal wires) and wires. Prolonged sitting pressure, curling, or folding during storage can cause material fatigue, potentially leading to breakage, short circuits, or even a fire hazard due to repeated bending of the wiring and heating element.

[0003] For the reasons mentioned above, international safety standards (such as IEC 60335-1 and GB 4706.1) clearly require that portable flexible electric heating appliances (heated seat cushions) must pass mechanical strength tests. If bending cycle tests are conducted manually, it is impossible to accurately simulate the combined vertical and shear forces under sitting pressure, and it is also impossible to complete more than 10,000 bending cycle tests manually, and the efficiency of manual testing is low. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a bending test device for heated seat cushions.

[0005] The objective of this utility model can be achieved through the following technical solution: a bending test device for a heated seat cushion, comprising:

[0006] The frame is provided with rollers and a movable sliding seat, the sliding seat being provided with a first connecting part for connecting to one end of the heated seat pad;

[0007] A linear drive element is mounted on the frame and connected to the sliding block. The linear drive element can drive the sliding block to perform linear reciprocating motion.

[0008] A tensioning element, wherein the tensioning element is provided with a second connecting portion for connecting to the other end of the heated seat cushion;

[0009] The sliding seat and the tensioning element are configured to apply tension to both ends of the heated seat, respectively. The straight line A passing through the sliding seat and tangent to the roller shaft is not collinear with the straight line B passing through the tensioning element and tangent to the roller shaft. The moving direction of the sliding seat is set to move along the straight line A, and the moving direction of the tensioning element is set to move along the straight line B.

[0010] Preferably, the sliding seat includes a connecting bracket and a crossbar, the connecting bracket is fixedly connected to the linear drive element, the first connecting part is disposed on the crossbar, the crossbar is connected to the connecting bracket, and the crossbar is parallel to the roller shaft.

[0011] Preferably, the linear drive element is configured as a cylinder, an electric lead screw, or a linear slide.

[0012] Preferably, the frame is provided with a movable adjustment seat, the roller is disposed on the adjustment seat, and the roller can be moved relative to the frame through the adjustment seat to adjust the angle between line A and line B.

[0013] Preferably, a heating element is provided inside the roller.

[0014] Preferably, it also includes a power supply module for powering the heated seat cushion.

[0015] Preferably, the frame is further provided with a pressure roller, which is arranged parallel to the roller shaft, and the pressure roller is close to the roller shaft with a gap reserved between them for the heated seat cushion to pass through.

[0016] Preferably, one of the pressure roller and the roller shaft is slidably connected to the frame and the other is fixedly connected to the frame, and one of the pressure roller and the roller shaft is movable relative to the other to adjust the gap between them.

[0017] Preferably, the tensioning element is configured as a cable and a counterweight, one end of the cable is connected to the counterweight, and the other end of the cable is configured as the second connecting part, and the extension direction of the straight line B is consistent with the vertical direction.

[0018] Preferably, the tensioning element is a tension spring, one end of which holds the other end fixed and the other end is configured as the second connecting part.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. A device is provided that can automatically perform bending tests on heated seat cushions. The sliding seat and tensioning element can pull the heated seat cushion to move back and forth relative to the roller, thereby causing the heated seat cushion to be repeatedly squeezed by the roller to simulate the bending effect, realizing the effect of full automation and improving testing efficiency.

[0021] 2. Moving the roller shaft changes the angle between straight line A (the direction of force applied by the sliding seat) and straight line B (the direction of force applied by the tensioning element), thereby changing the bending angle of the heated seat. In other words, the test bending angle of the heated seat can be changed by changing the position of the roller shaft. A single device can meet the simulation requirements of different degrees of bending.

[0022] 3. Since the heated seat cushion will generate heat when powered on in actual use, a heating element is specially set in the roller to simulate the bending process of the heated seat cushion under actual heating. The heating element can heat the heated seat cushion to be tested through the roller, simulating the state of the heated seat cushion under bending stress at real working temperature, making the bending fatigue test environment closer to the actual use conditions of the product, and the test results more reliable. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of straight lines A and B of the bending test device of this utility model.

[0025] Figure 3 This is a structural schematic diagram of Embodiment 5 of the present invention.

[0026] Figure 4 This is a schematic diagram of the principle of Embodiment 5 of this utility model.

[0027] Figure 5 This is a schematic diagram of the principle of Embodiment Six of this utility model.

[0028] Figure 6 This is a structural schematic diagram of Embodiment 4 of the present invention.

[0029] Figure 7 This is a schematic diagram illustrating the principle of Embodiment 4 of this utility model.

[0030] In the figure, 100 is the frame; 110 is the roller; 120 is the connecting bracket; 130 is the crossbar; 140 is the first connecting part; 150 is the adjusting seat; 160 is the pressure roller; 200 is the linear drive element; 310 is the cable; 320 is the counterweight; 330 is the tension spring; 340 is the second connecting part; and 500 is the heated seat. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] like Figures 1 to 7 As shown, a bending test device for a heated seat cushion includes:

[0033] The frame 100 is provided with a roller 110 and a movable sliding seat, the sliding seat being provided with a first connecting part 140 for connecting to one end of the heated seat 500.

[0034] Linear drive element 200 is mounted on frame 100 and connected to slide block. Linear drive element 200 can drive slide block to perform linear reciprocating motion.

[0035] A tensioning element is provided with a second connecting portion 340 for connecting to the other end of the heated seat cushion 500;

[0036] The sliding seat and the tensioning element are configured to apply tension to both ends of the heated seat 500 respectively. The straight line A that passes through the sliding seat and is tangent to the roller shaft 110 is not collinear with the straight line B that passes through the tensioning element and is tangent to the roller shaft 110. The moving direction of the sliding seat is set to move along the straight line A, and the moving direction of the tensioning element is set to move along the straight line B.

[0037] The roller 110 acts as a key bending fulcrum, and the heated seat 500 bends at the roller 110. The sliding seat and tensioning element enable the heated seat 500 to move back and forth on the roller 110. Line A is actually a straight line that passes through the first connecting part 140 and is tangent to the roller 110, and line B is actually a straight line that passes through the second connecting part 340 and is tangent to the roller 110.

[0038] Since the tension of the sliding seat is set along line A and the tension of the tensioning element is set along line B, and lines A and B are not collinear, this means that there is an angle between the tensions at both ends of the heated seat 500, thus putting the heated seat 500 in a bent posture (the bending point is at roller 110). When the linear drive element 200 slides back and forth through the sliding seat, the heated seat 500 moves back and forth on the roller, allowing all parts of the heated seat 500 to be bent. This reciprocating process accurately simulates the repeated bending stress on the key parts of the heated seat 500 caused by the cyclical action of a person sitting up-sitting down-sitting up.

[0039] The most outstanding feature of this device is its ability to automatically simulate the bending stress experienced by the heated seat cushion 500 during actual use, thereby improving the realism of the seat cushion bending test. Furthermore, by controlling the linear drive element 200, it can perform thousands or even tens of thousands of bending cycles, significantly improving the efficiency of the bending test. Compared to manual or simple bending tests, this device ensures a high degree of consistency and stability in each bending action. The bending point of the seat cushion is strictly controlled at the roller 110, avoiding unreliable test results due to random bending.

[0040] In principle, this device uses roller 110 as a fixed fulcrum, combined with two tensile forces applied in different directions, both acting on the heated seat cushion 500, to forcibly cause the heated seat cushion 500 to bend repeatedly at roller 110. This simulates bending conditions in actual use, enabling rapid, controllable, quantitative, and consistent fatigue testing with good repeatability. It effectively exposes the weaknesses and failure modes of the internal electrical components (wires, heating wires, solder joints) and external materials of the heated seat cushion 500 under repeated bending stress, thus providing important evaluation criteria for the quality and lifespan of flexible heating products.

[0041] A device is provided that can automatically perform bending tests on a heated seat 500. The sliding seat and the tensioning element can pull the heated seat 500 back and forth relative to the roller 110, thereby causing the heated seat 500 to be repeatedly squeezed by the roller 110 to simulate the bending effect, achieving full automation and improving testing efficiency.

[0042] Based on the above embodiments, the sliding seat includes a connecting bracket 120 and a crossbar 130. The connecting bracket 120 is fixedly connected to the linear drive element 200. The first connecting part 140 is disposed on the crossbar 130. The crossbar 130 is connected to the connecting bracket 120 and the crossbar 130 is parallel to the roller shaft 110.

[0043] The crossbar 130 can be fixedly connected to one end of the heated seat cushion 500 through the first connecting part 140. The linear drive element 200 can drive the crossbar 130 to slide through the connecting bracket 120, thereby causing the heated seat cushion 500 to move back and forth.

[0044] Based on the above embodiments, the linear drive element 200 is configured as a cylinder, an electric lead screw, or a linear slide.

[0045] Example 1:

[0046] like Figure 1 , Figure 3 As shown, the frame 100 is provided with a movable adjustment seat 150, and the roller 110 is provided on the adjustment seat 150. The roller 110 can move relative to the frame 100 through the adjustment seat 150 to adjust the angle between the straight line A and the straight line B.

[0047] The moving roller 110 changes the angle between straight line A (the direction of force applied by the sliding seat) and straight line B (the direction of force applied by the tensioning element), thereby changing the bending angle of the heated seat 500. In other words, the test bending angle of the heated seat 500 can be changed by changing the position of the roller 110. A single device can meet the simulation requirements of different degrees of bending.

[0048] Example 2:

[0049] A heating element is installed inside the roller 110.

[0050] Since the heated seat cushion 500 will generate heat when powered on in actual use, a heating element is specially set in the roller 110 to simulate the bending process of the heated seat cushion 500 under actual heating. The heating element can heat the heated seat cushion 500 to be tested through the roller 110, simulating the state of the heated seat cushion 500 under bending stress at real working temperature, making the bending fatigue test environment closer to the actual use conditions of the product, and the test results more reliable.

[0051] Example 3:

[0052] It also includes a power supply module for powering the heated seat cushion 500.

[0053] Both Example 3 and Example 2 aim to keep the heated seat cushion 500 in a heated state during the bending test. However, unlike Example 2, Example 3 provides power to the heated seat cushion 500 so that the bending test can be carried out when the heated seat cushion 500 is in a real powered and heated working state.

[0054] The heating cushion 500 is continuously powered during repeated bending, which can detect potential electrical faults caused by repeated bending. In addition, mechanical stress and thermal stress are applied to the heating cushion 500 during the bending test, simulating the real aging process of key parts of the heating cushion 500 under repeated bending in an electric heating working environment. This makes the bending fatigue test environment closer to the actual use conditions of the product, and the test results are more reliable.

[0055] Example 4:

[0056] like Figure 6 , Figure 7 As shown, based on the above embodiment, the frame 100 is also provided with a pressure roller 160, which is arranged parallel to the roller shaft 110. The pressure roller 160 is close to the roller shaft 110 and a gap is reserved between them for the heating cushion 500 to pass through.

[0057] The heated seat cushion 500 passes through the gap between the pressure roller 160 and the roller shaft 110. When the heated seat cushion 500 is repeatedly bent, the pressure roller 160 will also squeeze the heated seat cushion 500, thereby subjecting the heated seat cushion 500 to a more rigorous side view.

[0058] Based on Embodiment 4, one of the pressure roller 160 and the roller shaft 110 is slidably connected to the frame 100 and the other is fixedly connected to the frame 100, and one of the pressure roller 160 and the roller shaft 110 can move relative to the other to adjust the gap between them.

[0059] By adjusting the gap between the pressure roller 160 and the roller shaft 110, the pressure applied to the heated seat cushion 500 can be changed; in addition, different heated seat cushions 500 have different thicknesses, and by adjusting the gap, heated seat cushions 500 of different thicknesses can pass through the gap.

[0060] Example 5:

[0061] like Figures 1 to 4 As shown, the tensioning element is a cable 310 and a counterweight 320. One end of the cable 310 is connected to the counterweight 320, and the other end of the cable 310 is a second connecting part 340. The extension direction of the straight line B is consistent with the vertical direction.

[0062] In Embodiment 5, the counterweight 320 uses its own weight to apply a constant tension to the heated seat cushion 500 through the cable 310, so the end of the heated seat cushion 500 is always subjected to the gravity of the counterweight 320.

[0063] During the test, due to the gravity of the counterweight 320, the heated seat 500 is always subjected to a downward pulling force. When the linear drive element 200 drives the sliding seat to retract, the sliding seat pulls the heated seat 500 to overcome the gravity of the counterweight 320 and thus move. When the linear drive element 200 drives the sliding seat to extend, the heated seat 500 moves in the opposite direction under the gravity of the counterweight 320, thus realizing the back-and-forth movement of the heated seat 500.

[0064] Example 6:

[0065] like Figure 1 , Figure 2 , Figure 5 As shown, the tensioning element is a tension spring 330, one end of which is fixed to the other end, and the other end is configured as a second connecting part 340.

[0066] In Example 6, a constant tension is applied to the heated seat cushion 500 by the tension spring 330, so the end of the heated seat cushion 500 is always subjected to the tension of the tension spring 330.

[0067] During the test, the heated seat cushion 500 is always under the tension of the tension spring 330. When the linear drive element 200 drives the sliding seat to retract, the sliding seat pulls the heated seat cushion 500 to overcome the tension of the tension spring 330 and thus move. At this time, the tension spring 330 extends and deforms. When the linear drive element 200 drives the sliding seat to extend, the heated seat cushion 500 moves in the opposite direction under the tension of the tension spring 330, thus realizing the back-and-forth movement of the heated seat cushion 500.

[0068] like Figures 1 to 5As shown, it should be noted that Embodiment Six and Embodiment Five are two different implementations of the tensioning element. Compared with Embodiment Five, the direction of the tension in Embodiment Six can be adjusted according to the actual situation. In Embodiment Five, the tension applied to the heated seat cushion 500 by the counterweight 320 by its own weight is always in the direction of a plumb bob, and the direction of the tension cannot be changed. However, in Embodiment Six, the direction of the tension can be changed simply by changing the relative position of the tension spring 330 and the roller 110 (i.e., changing the position of the fixed end of the tension spring 330).

[0069] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0070] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A bending test device for a heated seat cushion, characterized in that, include: A frame (100) is provided with a roller (110) and a movable sliding seat, the sliding seat being provided with a first connecting part (140) for connecting to one end of a heated seat (500); A linear drive element (200) is mounted on the frame (100) and connected to the sliding seat. The linear drive element (200) can drive the sliding seat to perform linear reciprocating motion. A tensioning element, the tensioning element being provided with a second connecting portion (340) for connecting to the other end of the heated seat cushion (500); The sliding seat and the tensioning element are configured to apply tension to both ends of the heated seat (500), respectively. The straight line A passing through the sliding seat and tangent to the roller (110) is not collinear with the straight line B passing through the tensioning element and tangent to the roller (110). The moving direction of the sliding seat is set to move along the straight line A, and the moving direction of the tensioning element is set to move along the straight line B.

2. The bending test device for a heated seat cushion as described in claim 1, characterized in that: The sliding seat includes a connecting bracket (120) and a crossbar (130). The connecting bracket (120) is fixedly connected to the linear drive element (200). The first connecting part (140) is disposed on the crossbar (130). The crossbar (130) is connected to the connecting bracket (120), and the crossbar (130) is parallel to the roller shaft (110).

3. The bending test device for a heated seat cushion as described in claim 1 or 2, characterized in that: The linear drive element (200) is configured as a cylinder, an electric lead screw, or a linear slide.

4. The bending test device for a heated seat cushion as described in claim 1, characterized in that: The frame (100) is provided with a movable adjustment seat (150), and the roller (110) is disposed on the adjustment seat (150). The roller (110) can move relative to the frame (100) through the adjustment seat (150) to adjust the angle between the straight line A and the straight line B.

5. The bending test device for a heated seat cushion as described in claim 1, characterized in that: A heating element is provided inside the roller (110).

6. The bending test device for a heated seat cushion as described in claim 1, characterized in that: It also includes a power supply module for powering the heated seat cushion (500).

7. The bending test device for a heated seat cushion as described in claim 1, characterized in that: The frame (100) is also provided with a pressure roller (160), which is arranged parallel to the roller shaft (110). The pressure roller (160) is close to the roller shaft (110) and a gap is reserved between them for the heated seat cushion (500) to pass through.

8. The bending test device for a heated seat cushion as described in claim 7, characterized in that: One of the pressure roller (160) and the roller shaft (110) is slidably connected to the frame (100) and the other is fixedly connected to the frame (100), and one of the pressure roller (160) and the roller shaft (110) is movable relative to the other to adjust the gap between them.

9. The bending test device for a heated seat cushion as described in claim 1, characterized in that: The tensioning element is configured as a cable (310) and a counterweight (320). One end of the cable (310) is connected to the counterweight (320), and the other end of the cable (310) is configured as the second connecting part (340). The extension direction of the straight line B is consistent with the vertical direction.

10. The bending test device for a heated seat cushion as described in claim 1, characterized in that: The tensioning element is configured as a tension spring (330), one end of which holds the other end fixed and the other end is configured as the second connecting part (340).

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