An electric seat wiring harness assembly with overload protection

Abstract

The application discloses a kind of electric seat harness assembly with overload protection, including harness body and detachable harness shell;Protection slider and conducting rack are slidably arranged in harness shell, and terminal group connected to harness power circuit is also provided, and conducting rack is electrically contacted with terminal group;Elastic sliding top block and safety seat, which are perpendicular to each other in sliding direction, are arranged on protection slider, and safety seat is provided with overcurrent protection device, and wedge-shaped platform matched with top block is arranged in harness shell;Conducting rack is provided with bimetallic strip, and bimetallic strip is deformed by heat to push protection slider to slide when overload, and overcurrent protection device is connected to circuit by cooperation of top block and wedge-shaped platform, and conducting rack is disconnected from main circuit subsequently, to realize graded overcurrent protection, and overload state can be directly prompted by mechanical displacement, to provide clear maintenance prompt for maintenance personnel, to facilitate timely cleaning and maintenance of seat slide rail, to reduce the risk of further wear of parts.

Description

Technical Field

[0001] This invention relates to the field of wiring harness technology, and in particular to an electric seat wiring harness assembly with overload protection. Background Technology

[0002] The power supply harness of existing electric seats usually only has a fuse connected in series as an overcurrent protection device. Relying on the thermal breaking principle of the fuse, the circuit is automatically disconnected when the circuit current exceeds the rated breaking threshold, so as to prevent the drive motor from burning out due to long-term overload operation, thus achieving the most basic circuit overcurrent protection function.

[0003] However, relying solely on fuses for protection has significant technical drawbacks: First, fuses are typical passive, post-fault protection devices. They can only cut off the circuit once the current reaches the melting threshold, serving as a remedial measure after a fault occurs. They cannot provide a clear status indication when the circuit current is at the critical overload state but has not yet reached the melting value. During routine maintenance, maintenance personnel cannot predict the wear and jamming of the slide rails based on the external condition of the wiring harness, making it difficult to carry out preventative cleaning and lubrication maintenance. Often, repairs are only carried out after the motor jams and the fuse blows, affecting the normal use of the seat and irreversibly accelerating the wear of the slide rails and motor, shortening the overall lifespan of the components. Second, the existing wiring harness protection structure has a single function, only achieving final overcurrent cutoff. It cannot provide graded protection for different levels of overload conditions as the slide rail resistance gradually increases. It is difficult to meet the protection needs of different operating conditions such as normal conduction operation, critical overload warning, and severe overload power-off protection, resulting in insufficient flexibility and reliability of the protection. Summary of the Invention

[0004] The purpose of this invention is to overcome the aforementioned shortcomings and provide an electric seat wiring harness assembly with overload protection. To achieve the above objective, the specific solution of this invention is as follows: An electric seat wiring harness assembly with overload protection includes a wiring harness body and a wiring harness housing detachably connected to the wiring harness body. The wire harness housing is equipped with a protective slider and a conductive frame that slide inside. The wire harness housing is also equipped with a terminal group that is connected to the wire harness power circuit. The protective slider and the conductive frame are movably connected, and the conductive frame can be detached from the ground and make electrical contact with the terminal group. The protective slider is elastically slidably fitted with a top block and a safety seat with mutually perpendicular sliding directions. The safety seat is detachably equipped with an overcurrent protection device, which is configured to disconnect the wire harness energizing circuit when the current in the wire harness energizing circuit exceeds a preset threshold. The wire harness housing is also equipped with a wedge-shaped platform for cooperating with the top block. The conductive frame is provided with a bimetallic strip that can be detached from the protective slider. The bimetallic strip is configured to push the protective slider to slide when its temperature reaches the deformation threshold. With the cooperation of the top block and the wedge stage, the conductive frame is de-energized from the terminal group after the overcurrent protection device slides to make electrical contact with the terminal group.

[0005] Furthermore, the protective slider has a guide hole, and a first spring is provided in the guide hole. One end of the top block slides into the guide hole and abuts against one end of the first spring. The first spring keeps the other end of the top block extended until it contacts the surface of the wedge.

[0006] Furthermore, the wedge platform is provided with a first wedge surface, the first wedge surface having a vertex position, and the other end of the top block is provided with a second wedge surface that is adapted to the first wedge surface.

[0007] Furthermore, the protective slider is also provided with a guide block, the safety seat slides through the guide block, and a second spring is provided between the guide block and the safety seat, the stiffness of the second spring being less than the stiffness of the first spring.

[0008] Furthermore, guide posts are provided at both ends of the safety seat, and guide holes are provided at both ends of the guide block, with the guide posts movably passing through the corresponding guide holes.

[0009] Furthermore, the protective slider is provided with a sliding pin, and the conductive frame is provided with a strip-shaped sliding hole. The strip-shaped sliding hole extends along the sliding direction of the protective slider, and the sliding pin is movably embedded in the strip-shaped sliding hole.

[0010] Furthermore, a push rod is slidably inserted inside the wire harness housing on the side away from the conductive frame. When the bimetallic strip pushes the protective slider to slide, the protective slider can contact the push rod and push the push rod to slide, so that one end of the push rod passes out of the wire harness housing.

[0011] Furthermore, friction blocks are respectively provided on both sides of the push rod inside the wire harness housing, and the friction blocks are in frictional contact with the push rod.

[0012] Further, the terminal group includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal; the first terminal and the third terminal are disposed at the end of the wire harness housing away from the wire harness body, one end of the third terminal is electrically connected to the first terminal, one end of the second terminal passes through the end of the wire harness housing away from the wire harness body, and the other end passes through the wire harness body, the fourth terminal and the fifth terminal are disposed on the wire harness body, one end of the fifth terminal is electrically connected to the fourth terminal, one end of the first terminal and one end of the fourth terminal are on the same horizontal line, and the other end of the fifth terminal and the other end of the third terminal are on the same horizontal line; The two ends of the conductive frame are in active electrical contact with one end of the first terminal and one end of the fourth terminal, respectively. When the bimetallic strip pushes the protective slider to slide, the protective slider causes the overcurrent protection device to slide until the overcurrent protection device is in electrical contact with the other end of the fifth terminal and the other end of the third terminal, and the conductive frame is disconnected from the electrical contact with one end of the first terminal and one end of the fourth terminal.

[0013] Furthermore, the ends of the wire harness body are provided with hooks at intervals, and both sides of the wire harness housing are provided with locking holes for the hooks to engage.

[0014] The beneficial effects of this invention are as follows: This invention uses a detachable wire harness body and wire harness housing as an assembly carrier. A sliding protective slider, a conductive frame, and a terminal group connected to the wire harness power circuit are integrated within the wire harness housing. Combined with the temperature-sensitive deformation characteristics of the bimetallic strip and the inclined surface transmission of the wedge-shaped platform and top block, the overload state of the wire harness power circuit can be automatically identified and the circuit can be switched in stages through a purely mechanical structure. When the circuit current rises to the critical overload state, the bimetallic strip on the conductive frame deforms due to heat and pushes the protective slider to slide. With the cooperation of the top block and the wedge-shaped platform, the overcurrent protection device on the fuse holder is first connected to the terminal group to form a protective circuit. Subsequently, the conductive frame is driven to disengage from the terminal group, achieving a smooth transition from the main power supply circuit to the fuse protection circuit. This not only limits the motor from continuing to operate under high load, but also visually reflects the overload state of the circuit through the mechanical displacement of the protective slider, providing maintenance personnel with clear inspection prompts, facilitating timely cleaning and maintenance of the seat slide rail, and reducing the risk of further wear on components. Meanwhile, the overcurrent protection device can automatically disconnect the circuit when the circuit current further increases to the fusing threshold, forming a two-level protection mechanism of critical overload switching protection and severe overcurrent cut-off protection, which effectively improves the protection reliability of the wiring harness assembly. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the electric seat wiring harness assembly provided in an embodiment of the present invention at its initial state; Figure 2 This is a cross-sectional schematic diagram of the electric seat wiring harness assembly provided in an embodiment of the present invention from another perspective at the initial stage; Figure 3 This is a cross-sectional schematic diagram of the electric seat wiring harness assembly provided in the embodiment when the protection circuit is connected; Figure 4 This is a schematic diagram of the electric seat wiring harness assembly provided in this embodiment of the invention after the wiring harness housing is initially hidden; Figure 5 This is a schematic diagram of the structure of the conductive frame, bimetallic strip, protective slider, guide block and safety seat provided in the embodiment of the present invention; Figure 6 This is a structural schematic diagram from another perspective of the cooperation between the conductive frame, bimetallic strip, protective slider, guide block and safety seat provided in the embodiment of the present invention; Explanation of reference numerals in the attached drawings: 1. Wire harness body; 11. Hook; 2. Wire harness housing; 21. Wedge-shaped platform; 211. First wedge-shaped surface; 212. Vertex position; 22. Snap hole; 3. Protective slider; 31. First spring; 32. Sliding pin; 4. Conductive frame; 41. Bimetallic strip; 42. Strip-shaped sliding hole; 5. Top block; 51. Second wedge-shaped surface; 6. Safety seat; 61. Overcurrent protection device; 62. Guide post; 7. Guide block; 71. Second spring; 72. Guide hole; 8. Push rod; 81. Friction block; 91. First terminal; 92. Second terminal; 93. Third terminal; 94. Fourth terminal; 95. Fifth terminal. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the invention to this.

[0017] like Figures 1 to 6 As shown, the electric seat wiring harness assembly with overload protection described in this embodiment includes a wiring harness body 1 and a wiring harness housing 2 detachably connected to the wiring harness body 1. The wire harness housing 2 is equipped with a protective slider 3 and a conductive frame 4. The wire harness housing 2 is provided with a terminal group connected to the wire harness power circuit. The protective slider 3 is movably connected to the conductive frame 4, and the conductive frame 4 can be detached from the ground and electrically contact the terminal group. The protective slider 3 is elastically slidably provided with a top block 5 and a safety seat 6 with mutually perpendicular sliding directions. The safety seat 6 is detachably provided with an overcurrent protection device 61. The overcurrent protection device 61 is preferably a fuse. The overcurrent protection device 61 is configured to disconnect the wire harness power supply circuit when the current in the wire harness power supply circuit is greater than a preset threshold. The wire harness housing 2 is also provided with a wedge-shaped platform 21 for cooperating with the top block 5. The conductive frame 4 is provided with a bimetallic strip 41 that can be detached from the protective slider 3. The bimetallic strip 41 is configured to push the protective slider 3 to slide when its temperature reaches the deformation threshold. With the cooperation of the top block 5 and the wedge stage 21, the conductive frame 4 is de-energized from the terminal group after the overcurrent protection device 61 slides to make electrical contact with the terminal group.

[0018] Specifically, in the initial state of the electric seat wiring harness assembly with overload protection in this embodiment, the conductive frame 4 and the terminal group maintain electrical contact, and the wiring harness power circuit is normally connected through the conductive frame 4. At this time, the overcurrent protection device 61 is not connected to the circuit, the temperature of the bimetallic strip 41 is lower than the deformation threshold, and it maintains its initial shape. The top block 5 abuts against the corresponding position of the wedge platform 21 under the elastic action, and the protective slider 3 and the conductive frame 4 maintain a relative initial position.

[0019] It should be noted that, for ease of explanation, the wiring harness energized circuit when the overcurrent protection device 61 is connected to the circuit is defined as the protection circuit, and the wiring harness energized circuit when the overcurrent protection device 61 is not connected to the circuit is defined as the main circuit.

[0020] When the main circuit current increases due to the increased resistance of the slide rail, the bimetallic strip 41 connected in series in the main circuit generates more heat as the current increases, and the temperature gradually rises. When the current reaches the first preset threshold, the temperature of the bimetallic strip 41 reaches the deformation threshold and undergoes bending deformation. During the deformation process, a pushing force is applied to the protective slider 3, which pushes the protective slider 3 to move relative to the conductive frame 4 along the sliding direction. During the movement of the protective slider 3, the top block 5 elastically inserted on it moves synchronously. The top block 5 slides along the surface of the wedge-shaped platform 21. Under the guidance of the inclined surface of the wedge-shaped platform 21, the top block 5 undergoes elastic contraction perpendicular to the sliding direction relative to the protective slider 3. At the same time, the protective slider 3 drives the fuse seat 6 and the overcurrent protection device 61 to move synchronously. When the overcurrent protection device 61 moves to the position corresponding to the terminal group and forms a reliable electrical contact, the overcurrent protection device 61 is officially connected to the wiring harness energizing circuit. As the bimetallic strip 41 continues to deform and push the protection slider 3 to move, under the cooperation of the top block 5 and the wedge platform 21, the protection slider 3 drives the conductive frame 4 to move synchronously, causing the conductive frame 4 to lose electrical contact with the terminal group, the main circuit is disconnected, and the wiring harness energizing circuit is completely switched to the protection circuit energized by the overcurrent protection device 61. When the circuit current in the protection circuit further increases to the second preset threshold, which is the melting threshold of the overcurrent protection device 61, the overcurrent protection device 61 will activate and disconnect the protection circuit, achieving the final overcurrent cut-off protection. After the fault is cleared, the protection slider 3 can be pushed in reverse to reset, so that the conductive frame 4 re-contacts the terminal group and conducts, the overcurrent protection device 61 loses electrical contact with the terminal group, and the initial normal conduction state is restored.

[0021] This embodiment uses the temperature-sensitive deformation of the bimetallic strip 41 as a purely mechanical drive source, combined with the transmission cooperation of the protective slider 3, the conductive frame 4, the wedge platform 21, and the top block 5, to achieve automatic switching from the main circuit to the protective circuit. It can respond to the circuit overload state without additional electronic control components, has high structural reliability, and is suitable for the complex temperature and vibration environment of the vehicle. By first connecting the protective circuit and then disconnecting the main circuit, the timing design avoids the instantaneous power outage during the circuit switching process, ensuring the continuity of the seat adjustment process. At the same time, the overload state is converted into the mechanical displacement of the protective slider 3, which can intuitively reflect the overload condition of the circuit, making it easy for maintenance personnel to quickly identify the wear state of the slide rail and carry out preventive cleaning and maintenance. The overcurrent protection device 61 is detachable for easy replacement and maintenance in the future. The wiring harness housing 2 and the wiring harness body 1 are detachably connected, which facilitates overall assembly and maintenance.

[0022] In this embodiment, as Figure 5and Figure 6 As shown, the conductive frame 4 has hinge holes at both ends, and the bimetallic strip 41 has hinge pins at both ends. The hinge pins are movably embedded in the corresponding hinge holes, so that when the bimetallic strip 41 deforms, the hinge pins move in the hinge holes.

[0023] The electric seat wiring harness assembly in this embodiment, such as Figures 1 to 3 As shown, the protective slider 3 has a guide hole, and a first spring 31 is installed inside the guide hole. One end of the top block 5 slides into the guide hole and abuts against one end of the first spring 31. The first spring 31 keeps the other end of the top block 5 extended to contact the surface of the wedge platform 21. In the initial state, the first spring 31 is in a pre-compressed state, continuously applying an outward elastic force to the top block 5, so that the outer end of the top block 5 always abuts against the surface of the wedge platform 21. When the protective slider 3 is pushed and slid by the bimetallic strip 41, the top block 5 moves synchronously with the protective slider 3. The inclined surface of the wedge platform 21 squeezes the outer end of the top block 5, causing the top block 5 to overcome the elastic force of the first spring 31 and slide inward along the guide hole. The first spring 31 is further compressed and accumulates elastic potential energy. When the top block 5 moves past the apex position 212 of the wedge platform 21, the first spring 31 releases its elastic force, pushing the top block 5 to extend outward along the guide hole and reset, providing a reverse sliding driving force for the protective slider 3, and driving the conductive frame 4 to complete the action of disengaging from the terminal group. During the reset process, the protective slider 3 slides in the opposite direction, and the top block 5 is squeezed and contracted by the wedge platform 21 again. After passing the apex, it extends and resets again, eventually returning to the initial position.

[0024] In this embodiment, the elastic force of the first spring 31 is used to ensure that the top block 5 and the wedge platform 21 are always in contact, thus ensuring the stability and reliability of the inclined plane transmission. At the same time, the energy storage and release process of the first spring 31 provides driving force for the displacement of the protective slider 3 after it crosses the apex of the wedge platform 21, ensuring that the conductive frame 4 can reliably disengage from the terminal group and achieve stable switching of the circuit.

[0025] The electric seat wiring harness assembly in this embodiment, such as Figures 1 to 3As shown, the wedge platform 21 has a first wedge surface 211 with a vertex position 212. The other end of the top block 5 has a second wedge surface 51 that matches the first wedge surface 211. Specifically, the first wedge surface 211 of the wedge platform 21 extends obliquely along the sliding direction of the protective slider 3 and forms a vertex position 212 in the middle. The vertex divides the first wedge surface 211 into an ascending slope section and a descending slope section. The second wedge surface 51 at the end of the top block 5 matches the slope angle of the first wedge surface 211, and the two maintain surface contact. When the protective slider 3 slides in the overload switching direction, the second wedge-shaped surface 51 of the top block 5 slides along the rising slope section of the first wedge-shaped surface 211. The slope gradually compresses the top block 5 inward, accumulating elastic potential energy. When the top block 5 moves to the vertex position 212, the contraction of the top block 5 reaches its maximum value. After passing the vertex, the top block 5 enters the descending slope section of the first wedge-shaped surface 211, the elastic potential energy is released, and the top block 5 extends outward. At the same time, the component force of the slope pushes the protective slider 3 to continue sliding forward, causing the conductive frame 4 to disengage from the terminal group. During the reset process, the top block 5 slides in the opposite direction along the descending slope section to the vertex, and then returns to the initial position along the rising slope section, completing the reset action.

[0026] This embodiment utilizes the travel inflection point formed by the vertex position 212 of the first wedge surface 211 to realize the action sequence of first contracting and storing energy and then releasing and driving, ensuring the switching sequence of the overcurrent protection device 61 first connecting to the circuit and the conductive frame 4 then disconnecting from the circuit, thus avoiding power outages during circuit switching.

[0027] The electric seat wiring harness assembly in this embodiment, such as Figures 1 to 6 As shown, a guide block 7 is also provided on the protective slider 3. The fuse seat 6 slides through the guide block 7. A second spring 71 is provided between the guide block 7 and the fuse seat 6. The stiffness of the second spring 71 is less than that of the first spring 31. In this embodiment, there are two second springs 71, which are spaced apart. In this embodiment, the guide block 7 is used to guide the sliding of the fuse seat 6, ensuring the accurate movement direction of the overcurrent protection device 61 and ensuring the accuracy of the alignment with the terminal group. The second spring 71, which has a smaller stiffness, provides buffering and clamping force after the overcurrent protection device 61 contacts the terminal. This ensures the contact pressure between the overcurrent protection device 61 and the terminal, avoiding poor contact, overheating and arcing. It also achieves precise control of the action timing, ensuring the switching logic of "connecting the protection device first and then disconnecting the main circuit", preventing circuit power failure or device damage caused by incorrect switching timing.

[0028] Specifically, the safety seat 6 is slidably mounted on the guide block 7 of the protective slider 3, and the second spring 71 is disposed between the guide block 7 and the safety seat 6 to provide elastic support for the safety seat 6. In the initial state, the second spring 71 maintains its initial length, the safety seat 6 and the guide block 7 maintain their relative initial positions, and the overcurrent protection device 61 moves synchronously with the safety seat 6. When the protective slider 3 moves the guide block 7 towards the terminal group, the fuse holder 6 moves the overcurrent protection device 61 towards the terminal group simultaneously. When both ends of the overcurrent protection device 61 contact the corresponding contact positions of the terminal group, the overcurrent protection device 61 and the fuse holder 6 are stopped by the terminal group, while the guide block 7 continues to slide with the protective slider 3. At this time, the second spring 71 is compressed, and the elastic force of the second spring 71 presses the overcurrent protection device 61 firmly onto the terminal group, ensuring the reliability of electrical contact. Since the stiffness of the second spring 71 is less than that of the first spring 31, the second spring 71 will be compressed first after the overcurrent protection device 61 contacts the terminal group. At this time, the top block 5 still maintains contact with the wedge platform 21 and will not prematurely trigger the disengagement action of the conductive frame 4, ensuring that the overcurrent protection device 61 is reliably connected to the circuit first. During the reset process, the guide block 7 moves in the opposite direction with the protective slider 3, the second spring 71 gradually returns to its original length, and then moves the fuse holder 6 and the overcurrent protection device 61 synchronously, disengaging from the electrical contact with the terminal group.

[0029] The electric seat wiring harness assembly in this embodiment, such as Figure 5 and Figure 6 As shown, guide posts 62 are provided at both ends of the fuse holder 6, and guide holes 72 are provided at both ends of the guide block 7. The guide posts 62 move through the corresponding guide holes 72. In this embodiment, the guide posts 62 and guide holes 72 arranged symmetrically at both ends cooperate to provide dual-point guiding support for the fuse holder 6, which effectively improves the smoothness of the sliding of the fuse holder 6, prevents the fuse holder 6 from deflecting or getting stuck during the sliding process, and ensures that the two ends of the overcurrent protection device 61 can contact the terminal group synchronously and in alignment, avoiding problems such as one-sided contact or poor contact.

[0030] The electric seat wiring harness assembly in this embodiment, such as Figure 6As shown, the protective slider 3 is provided with a sliding pin 32, and the conductive frame 4 has a strip-shaped sliding hole 42. The strip-shaped sliding hole 42 extends along the sliding direction of the protective slider 3, and the sliding pin 32 is movably embedded in the strip-shaped sliding hole 42. Specifically, the sliding pin 32 on the protective slider 3 is embedded in the strip-shaped sliding hole 42 of the conductive frame 4. The sliding pin 32 can slide freely along the length direction of the strip-shaped sliding hole 42. The effective stroke length of the strip-shaped sliding hole 42 is adapted to the moving distance of the overcurrent protection device 61 from the initial position to the connected terminal group. The two ends of the strip-shaped sliding hole 42 limit the relative sliding stroke between the protective slider 3 and the conductive frame 4. In the initial state, the sliding pin 32 is located at one end of the strip-shaped sliding hole 42 near the bimetallic strip 41. When the bimetallic strip 41 pushes the protective slider 3 to begin sliding, the sliding pin 32 slides along the strip-shaped sliding hole 42 to the other end. At this time, the protective slider 3 moves relative to the conductive frame 4, while the conductive frame 4 remains temporarily stationary. The overcurrent protection device 61 gradually approaches the terminal group. When the sliding pin 32 slides to the other end of the strip-shaped sliding hole 42, the relative travel between the protective slider 3 and the conductive frame 4 ends. The protective slider 3 continues to move under the drive of the bimetallic strip 41, and the sliding pin 32 pushes the conductive frame 4 to slide synchronously, causing the conductive frame 4 to disengage from the terminal group. During the reset process, the protective slider 3 moves in the opposite direction, and the sliding pin 32 first slides in the opposite direction along the strip-shaped sliding hole 42 until it reaches the initial end of the strip-shaped sliding hole 42. Then, it drives the conductive frame 4 to reset synchronously and re-establish contact with the terminal group for conduction.

[0031] In this embodiment, the sliding pin 32 and the strip-shaped sliding hole 42 cooperate to realize the movable connection between the protective slider 3 and the conductive frame 4. This allows for a certain relative sliding between the two, providing an independent operating stroke for the overcurrent protection device 61 to enter the circuit. It can also stably transmit thrust after the relative stroke ends, driving the conductive frame 4 to complete the disengagement action. This precisely controls the timing of the circuit switching action, ensuring the logic that the overcurrent protection device 61 is connected first and the main circuit is disconnected later.

[0032] The electric seat wiring harness assembly in this embodiment, such as Figures 2 to 4 As shown, a push rod 8 is slidably inserted into the wire harness housing 2 on the side away from the conductive frame 4. When the bimetallic strip 41 pushes the protective slider 3 to slide, the protective slider 3 can contact the push rod 8 and push the push rod 8 to slide, so that one end of the push rod 8 protrudes out of the wire harness housing 2. Specifically, the push rod 8 is slidably inserted into the side wall of the wire harness housing 2 on the side away from the conductive frame 4, with its inner end located inside the wire harness housing 2 and corresponding to the end of the protective slider 3, and its outer end extending out of the wire harness housing 2. In the initial state, the inner end of the push rod 8 maintains a distance or slight contact with the protective slider 3, and the entire push rod 8 is housed inside the wire harness housing 2, with its outer end not protruding from the outer surface of the wire harness housing 2.

[0033] When the bimetallic strip 41 pushes the protective slider 3 to slide in the overload direction, the end of the protective slider 3 abuts against the inner end of the push rod 8 and pushes the push rod 8 to slide outward synchronously, so that the outer end of the push rod 8 extends outside the wire harness housing 2; when the protective slider 3 needs to be reset, the outer end of the push rod 8 can be pushed inward, and the inner end of the push rod 8 pushes the protective slider 3 to slide in the opposite direction. The protective slider 3 drives the top block 5 to move in the opposite direction, the first spring 31 is compressed again, and the end of the top block 5 moves in the opposite direction along the trajectory of the first wedge surface 211. At this time, the overcurrent protection device 61 still maintains electrical contact with the third terminal 93 and the fifth terminal 95 under the elastic force of the second spring 71, and the sliding pin 32 moves along the strip The sliding hole 42 moves in the opposite direction until the protective slider 3 pushes the conductive frame 4 to reset through the sliding pin 32, so that the conductive frame 4 is reset to make electrical contact with the first terminal 91 and the fourth terminal 94. At this time, the end of the top block 5 gradually passes the apex position 212 of the first wedge surface 211, and the first spring 31 reaches the maximum compression state. As the protective slider 3 continues to move, the first spring 31 pushes the top block 5 to reset outward, thereby continuing to push the protective slider 3 to reset. At this time, the protective slider 3 drives the safety seat 6 to reset through the guide block 7 and the second spring 71, so that the overcurrent protection device is disconnected from the electrical contact with the third terminal 93 and the fifth terminal 95, thereby completing the reset action of the entire mechanism.

[0034] This embodiment uses a retractable push rod 8 to convert the internal displacement of the protective slider 3 into an externally visible extension action, serving as a direct mechanical indication of overload conditions. Maintenance personnel can quickly determine if an overload has occurred in the circuit by observing the extension state of the push rod 8 without disassembling the wiring harness housing 2, facilitating timely cleaning of the slide rails and maintenance of the circuit. On the other hand, the push rod 8 can also serve as a reset mechanism. After troubleshooting, the entire mechanism can be reset directly by pressing the push rod 8 without disassembling the housing, making the reset operation simple and convenient and improving the ease of subsequent maintenance.

[0035] The electric seat wiring harness assembly in this embodiment, such as Figure 4 As shown, friction blocks 81 are respectively provided on both sides of the push rod 8 inside the wiring harness housing 2, and the friction blocks 81 are in frictional contact with the push rod 8. In this embodiment, by providing friction blocks 81 on both sides of the push rod 8, a stable frictional positioning force is provided for the push rod 8, so that the push rod 8 can stably maintain the extended state after being triggered by overload, avoiding the push rod 8 from retracting itself due to vehicle vibration, ensuring the stability and reliability of the overload warning state, and preventing maintenance personnel from misjudging the working condition.

[0036] The electric seat wiring harness assembly in this embodiment, such as Figures 1 to 4As shown, the terminal group includes a first terminal 91, a second terminal 92, a third terminal 93, a fourth terminal 94, and a fifth terminal 95; the first terminal 91 and the third terminal 93 are disposed at the end of the wire harness housing 2 away from the wire harness body 1, one end of the third terminal 93 is electrically connected to the first terminal 91, one end of the second terminal 92 passes through the end of the wire harness housing 2 away from the wire harness body 1, and the other end passes through the wire harness body 1, the fourth terminal 94 and the fifth terminal 95 are disposed on the wire harness body 1, one end of the fifth terminal 95 is electrically connected to the fourth terminal 94, one end of the first terminal 91 and one end of the fourth terminal 94 are on the same horizontal line, and the other end of the fifth terminal 95 and the other end of the third terminal 93 are on the same horizontal line; The two ends of the conductive frame 4 are in active electrical contact with one end of the first terminal 91 and one end of the fourth terminal 94, respectively. When the bimetallic strip 41 pushes the protective slider 3 to slide, the protective slider 3 drives the overcurrent protection device 61 to slide until the overcurrent protection device 61 is in electrical contact with the other end of the fifth terminal 95 and the other end of the third terminal 93, and the conductive frame 4 is disconnected from the electrical contact with one end of the first terminal 91 and one end of the fourth terminal 94.

[0037] Specifically, the first terminal 91 and the third terminal 93 are fixed to the end of the harness housing 2 away from the harness body 1, and are internally electrically connected, forming a terminal pair on the first side; the fourth terminal 94 and the fifth terminal 95 are fixed to the harness body 1, and are internally electrically connected, forming a terminal pair on the second side; the second terminal 92 serves as the circuit output terminal connected to the seat drive motor circuit. In the initial state, the two ends of the conductive frame 4 are respectively connected to the ends of the first terminal 91 and the fourth terminal 94, thereby connecting the main circuit through the first terminal 91, the conductive frame 4, and the fourth terminal 94; when the overload trigger protection slider 3 slides, the protection slider 3 drives the overcurrent protection device 61 to move, so that the two ends of the overcurrent protection device 61 are respectively connected to the ends of the third terminal 93 and the fifth terminal 95. At this time, the protection circuit is connected through the third terminal 93, the overcurrent protection device 61, and the fifth terminal 95. When the circuit current further exceeds the melting threshold of the overcurrent protection device 61, the overcurrent protection device 61 disconnects, the entire circuit is cut off, and the motor stops running.

[0038] The electric seat wiring harness assembly in this embodiment, such as Figures 1 to 4As shown, the ends of the wire harness body 1 are provided with hooks 11 at intervals, and both sides of the wire harness housing 2 are provided with locking holes 22 for the hooks 11 to engage. Specifically, during assembly, the wire harness housing 2 is inserted into the end of the wire harness body 1. The hooks 11 are elastically deformed by the pressure of the inner wall of the housing. When the housing is in place, the hooks 11 align with the locking holes 22, elastically reset, and lock into the locking holes 22, thus achieving the locking and fixing of the wire harness housing 2 and the wire harness body 1, completing the assembly. During disassembly, the ends of the hooks 11 locked in the locking holes 22 are pressed inward to disengage the hooks 11 from the locking holes 22, allowing the wire harness housing 2 to be pulled out of the wire harness body 1, achieving quick separation. This design facilitates subsequent disassembly and maintenance.

[0039] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included within the protection scope of this patent application.

Claims

1. An electric seat wiring harness assembly with overload protection, characterized in that, Includes a wire harness body and a wire harness housing detachably connected to the wire harness body; The wire harness housing is equipped with a protective slider and a conductive frame that slide inside. The wire harness housing is also equipped with a terminal group that is connected to the wire harness power circuit. The protective slider and the conductive frame are movably connected, and the conductive frame can be detached from the ground and make electrical contact with the terminal group. The protective slider is elastically slidably fitted with a top block and a safety seat with mutually perpendicular sliding directions. The safety seat is detachably equipped with an overcurrent protection device, which is configured to disconnect the wire harness energizing circuit when the current in the wire harness energizing circuit exceeds a preset threshold. The wire harness housing is also equipped with a wedge-shaped platform for cooperating with the top block. The conductive frame is provided with a bimetallic strip that can be detached from the protective slider. The bimetallic strip is configured to push the protective slider to slide when its temperature reaches the deformation threshold. With the cooperation of the top block and the wedge stage, the conductive frame is de-energized from the terminal group after the overcurrent protection device slides to make electrical contact with the terminal group.

2. The electric seat wiring harness assembly with overload protection according to claim 1, characterized in that, The protective slider has a guide hole, and a first spring is provided in the guide hole. One end of the top block slides into the guide hole and abuts against one end of the first spring. The first spring keeps the other end of the top block extended until it contacts the surface of the wedge.

3. The electric seat wiring harness assembly with overload protection according to claim 2, characterized in that, The wedge-shaped platform is provided with a first wedge-shaped surface, the first wedge-shaped surface having a vertex position, and the other end of the top block is provided with a second wedge-shaped surface that matches the first wedge-shaped surface.

4. The electric seat wiring harness assembly with overload protection according to claim 2, characterized in that, The protective slider is also provided with a guide block, the safety seat slides through the guide block, and a second spring is provided between the guide block and the safety seat. The stiffness of the second spring is less than that of the first spring.

5. The electric seat wiring harness assembly with overload protection according to claim 4, characterized in that, The safety seat is provided with guide posts at both ends, and the guide block is provided with guide holes at both ends respectively, with the guide posts moving through the corresponding guide holes.

6. The electric seat wiring harness assembly with overload protection according to claim 2, characterized in that, The protective slider is provided with a sliding pin, and the conductive frame is provided with a strip-shaped sliding hole. The strip-shaped sliding hole extends along the sliding direction of the protective slider, and the sliding pin is movably embedded in the strip-shaped sliding hole.

7. The electric seat wiring harness assembly with overload protection according to claim 1, characterized in that, The wire harness housing has a push rod slidably inserted on the side away from the conductive frame. When the bimetallic strip pushes the protective slider to slide, the protective slider can contact the push rod and push the push rod to slide, so that one end of the push rod passes out of the wire harness housing.

8. The electric seat wiring harness assembly with overload protection according to claim 7, characterized in that, The wire harness housing has friction blocks on both sides of the push rod, and the friction blocks are in frictional contact with the push rod.

9. The electric seat wiring harness assembly with overload protection according to claim 1, characterized in that, The terminal group includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal; the first terminal and the third terminal are disposed at the end of the wire harness housing away from the wire harness body, one end of the third terminal is electrically connected to the first terminal, one end of the second terminal passes through the end of the wire harness housing away from the wire harness body, and the other end passes through the wire harness body, the fourth terminal and the fifth terminal are disposed on the wire harness body, one end of the fifth terminal is electrically connected to the fourth terminal, one end of the first terminal and one end of the fourth terminal are on the same horizontal line, and the other end of the fifth terminal and the other end of the third terminal are on the same horizontal line; The two ends of the conductive frame are in active electrical contact with one end of the first terminal and one end of the fourth terminal, respectively; When the bimetallic strip pushes the protective slider to slide, the protective slider causes the overcurrent protection device to slide until the overcurrent protection device makes electrical contact with the other end of the fifth terminal and the other end of the third terminal, and causes the conductive frame to lose electrical contact with one end of the first terminal and one end of the fourth terminal.

10. An electric seat wiring harness assembly with overload protection according to any one of claims 1 to 9, characterized in that, The ends of the wire harness body are provided with hooks at intervals, and both sides of the wire harness housing are provided with locking holes for the hooks to engage.

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