Magnetic switch for starting automobile

Abstract

The invention relates to a magnetic switch for starting an automobile, which relates to the technical field of new energy automobile manufacturing and comprises a switch body and two binding posts fixedly arranged at one end of the switch body. Two opposite protective shells are arranged outside the end face, facing the binding post, of the switch body, and protective cavities are formed in the side faces, close to each other, of the two protective shells. A mounting opening is formed in the side face, facing the switch body, of the protective shell, a locking piece is arranged, a wiring notch is formed in the edge of an opening of the mounting opening, and a positioning protruding block is fixedly arranged on the inner wall of the opening; a limiting groove is formed in the switch body; the side edges, away from the switch body, of the two protective shells are rotationally connected through a rotating shaft. According to the invention, after the binding post and the connecting cable are in butt joint, the two protective shells are rotated oppositely to a protection state that the two protective shells are close to each other, and muddy water, dust and other impurities splashed on a muddy road surface are effectively prevented from making contact with the joint of the binding post and the cable.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicle manufacturing, and in particular to a magnetic switch for vehicle starting. Background Art

[0002] Currently, new energy vehicles have formed a diversified drive system, covering mainstream forms such as plug-in hybrid, pure electric, and fuel cell drive. Among them, plug-in new energy vehicles still carry a collaborative starting system of a combustion engine and a starter to ensure power reliability under complex working conditions. As the core starting component, the starter has clear stage characteristics in its operation: it only intervenes at the moment of vehicle start,带动 the stationary combustion engine to运转 through mechanical transmission. After the engine completes its self-combustion cycle and enters a stable working state, the starter immediately stops working and no longer participates in subsequent power output, only playing the key role of "starting energization" throughout the process. In related technologies, the magnetic switch supporting the starter of plug-in new energy vehicles mainly consists of a switch body and two terminal posts fixed at one end. The switch body adopts a split structure design of an upper shell and a lower shell. A moving contact piece is slidably assembled inside the upper shell, and a driving component is fixedly arranged; a static contact piece is fixedly installed at the corresponding position of the lower shell to form the core conductive mating structure. The driving component includes key components such as an attracting coil, a holding coil, a movable iron core, and a return spring. Its working logic is as follows: when the ignition switch is turned on during vehicle start, the attracting coil and the holding coil are simultaneously energized to generate a collaborative electromagnetic attraction force, pushing the moving contact piece and the static contact piece into close contact,实现 circuit conduction, and then triggering the starter to start; when the engine starts successfully, the coil is de-energized, the electromagnetic attraction force disappears, the return spring returns to pull the movable iron core back to its initial position, the moving contact piece and the static contact piece are separated, the circuit is disconnected, and the starter stops running, completing a complete start cycle. During the actual assembly and use process, the magnetic switch adopts an external installation method: first, fix the side of the switch body far from the terminal post to the outside of the starter with screws, then connect the two groups of connecting cables of the starter to the two terminal posts of the magnetic switch correspondingly, and finally install the whole with the starter near the connection part of the engine and the transmission. When the vehicle is driving on a muddy road surface, the wheels will pick up a large amount of mud and water. Since this installation position is close to the bottom of the vehicle, these mud and water are easily splashed directly to the connection part through the bottom clearance of the vehicle, resulting in problems such as mud adhesion and metal contact oxidation and corrosion at the connection of the connecting cable and the terminal post,进而 affecting the stability of the conductive performance. Seriously, it will cause poor contact of the starting circuit and lead to the failure of the starter to start, and there is room for improvement. Summary of the Invention

[0003] The purpose of this application is to provide a magnetic switch for vehicle starting, which solves the problem that oxidation, corrosion, and conductive failure are likely to occur at the connection of the connecting cable and the terminal post due to the splashing of mud and water on a muddy road surface in the above related technologies.

[0004] The magnetic switch for automobile starting provided in this application adopts the following technical solution: A magnetic switch for starting an automobile includes a switch body and two terminals fixed to one end of the switch body. The switch body has two opposing protective shells on its outer surface facing the terminals. Protective cavities for inserting the terminals are formed on the sides of the two protective shells that are close to each other. Each protective shell has a mounting opening communicating with the protective cavity on its side facing the switch body, and a locking element on its side away from the switch body. A wiring notch is formed on the edge of the mounting opening, and a positioning protrusion is fixed on the inner wall of the opening. A limiting groove is formed on the outer edge of the end face of the switch body facing the terminals. The two protective shells are rotatably connected by a rotating shaft on their sides away from the switch body. The two protective shells can rotate towards each other to a protective state where they are close to each other and are fixed by the locking element. When the protective shells are in the protective state, the positioning protrusion can engage with the limiting groove, and the two protective shells together cover the outside of the switch body to protect the two terminals.

[0005] By adopting the above technical solution, after the terminal block and connecting cable are connected, the two protective shells are rotated towards each other to a protective state where they are close to each other. The positioning protrusions are used to lock into the limiting grooves to achieve stable positioning, and then the locking parts are used to further fix them, so that the protective shells are together fitted on the outside of the switch body and precisely wrap around the terminal block area. This effectively prevents mud, water, dust and other impurities splashed from muddy roads from contacting the terminal block and cable connection, avoiding problems such as oxidation and corrosion of metal contacts and wear of cable insulation from the source. This ensures the stability of the conductivity of the starting circuit and reduces the risk of starting failure due to poor contact of the starter motor. At the same time, the rotating connection design of the protective shell, combined with the wiring notch, does not affect the normal lead-out and assembly operation of the connecting cable, and can adapt to the usage requirements of external installation scenarios. The overall structure is simple, reliable and easy to operate, which significantly improves the protection performance and service life of the magnetic switch under complex working conditions.

[0006] Optionally, a sealing plate is rotatably installed on the inner wall of the wiring notch away from the positioning protrusion. When the two protective shells are in the protected state and the magnetic switch is being transported, the two sealing plates can rotate towards each other to a sealing state within the wiring notch. When the two protective shells are in the protected state and the magnetic switch is being wired, the two sealing plates can rotate away from each other to a coaxial clearance state.

[0007] By adopting the above technical solution, the sealing plates can be rotated to the sealing state in opposite directions during transportation, which can seal the wiring gap and effectively prevent dust, impurities and other contaminants from entering the protective cavity during transportation, thus avoiding contamination or damage to the terminals; when wiring, the sealing plates can be rotated to the coaxial clearance state in opposite directions, which can smoothly avoid the connection cable and not affect the normal outgoing of the cable from the wiring gap, ensuring smooth wiring operation.

[0008] Optionally, the locking element includes a locking rod rotatably mounted on the side of the protective housing away from the positioning protrusion. The rotating surface of the locking rod is parallel to the side of the protective housing away from the positioning protrusion. The locking rod can be rotated to a locked state that is perpendicular to the rotation axis and abuts against the outer side of the adjacent protective housing, and rotated to an unlocked state that is parallel to the rotation axis and fixed.

[0009] By adopting the above technical solution, when locking, the locking lever is rotated to the vertical rotation axis position, abutting against the outer side of the adjacent protective shell to form a stable limit, ensuring that the protective shell remains in a protective state without loosening under conditions such as vehicle vibration and transportation bumps, and guaranteeing continuous protection of the terminal block; when unlocking, rotating it to the position parallel to the rotation axis releases the protective shell, facilitating subsequent opening and closing operations. The design of its rotating surface being parallel to the side of the protective shell means that the locking lever does not occupy extra space when stored, resulting in a compact overall structure. This improves the reliability of the protective shell's fixation without affecting the ease of assembly and use of the magnetic switch.

[0010] Optionally, a storage groove is provided on the side of the protective shell away from the positioning protrusion; when both locking rods are in the unlocked state, the two protective shells can rotate in opposite directions to a coaxial state, and the locking rod on one of the protective shells rotates into the storage groove on the other protective shell.

[0011] By adopting the above technical solution, the protective shells can be rotated to a coaxial state after unlocking. At this time, the locking rod of one protective shell can be rotated into the storage slot of the other protective shell, avoiding the locking rod from being exposed and interfering with operation or being damaged. At the same time, the coaxial state makes the protective shell layout compact, which does not affect the subsequent use of the magnetic switch, improves the convenience of structural storage, and optimizes the operating experience and space utilization.

[0012] Optionally, a guide slope is provided on the opening edge of the storage slot.

[0013] By adopting the above technical solution, the guide slope at the edge of the storage slot opening can guide the locking rod to rotate in, so that when the protective shell rotates to a coaxial state, the locking rod can smoothly slide into the storage slot along the guide slope, and storage can be completed without precise alignment.

[0014] Optionally, the sealing plate has receiving grooves on opposite sides facing the wiring notch, and flexible protective curtains are provided in the receiving grooves. Connecting rods are rotatably connected to the inner wall of the receiving grooves. The two connecting rods on the same sealing plate can rotate back to back to a coaxial support state. One edge of the flexible protective curtain is fixedly connected to the outer circumference of the connecting rod, and several hooks are fixed on the other edge of the flexible protective curtain. The flexible protective curtain is folded and stored in the receiving groove simultaneously when the connecting rod rotates into the receiving groove. When the two protective shells rotate back to back to a coaxial state and the sealing plate rotates to a yielding state, the connecting rod rotates to a support state. At this time, the sides of the two protective shells away from the sealing plate are placed on the ground, and the hooks on the two flexible protective curtains on the same side are engaged with each other. The switch body is placed horizontally between the two sealing plates, and the four flexible protective curtains provide temporary support for the switch body.

[0015] By adopting the above technical solution, when temporarily placed in special environments such as dampness, the protective shells are rotated back to back to coaxial, the sealing plates are rotated to the yielding state, and the connecting rods are rotated out to the supporting state. After the flexible protective curtain is unfolded, it is interlocked by the hooks, the protective shells touch the ground on the side, and the switch body is placed horizontally between the two sealing plates and supported by the flexible protective curtain, so as to avoid direct contact with the damp ground and damage. When not in the supporting state, the connecting rods are rotated into the receiving groove, and the flexible protective curtain is folded and stored at the same time without occupying extra space.

[0016] Optionally, a traction groove is provided on the opening edge of the receiving groove.

[0017] By adopting the above technical solution, the traction groove on the edge of the receiving slot provides a convenient force application point for the connecting rod to be rotated out. The connecting rod can be easily pulled out from the receiving slot to the support state without additional tools, simplifying the operation process. At the same time, it avoids the problem of the connecting rod being difficult to remove due to being too tightly fitted after storage, improves the ease of use of the temporary support function, and further optimizes the overall operating experience.

[0018] Optionally, an elastic protrusion is fixed on the outer periphery of the connecting rod, and a positioning groove is provided on the inner wall of the receiving groove for the elastic protrusion to be engaged.

[0019] By adopting the above technical solution, when the connecting rod is rotated into the receiving groove, the elastic protrusion can be locked into the positioning groove to form a stable limit, effectively preventing the connecting rod from accidentally rotating out due to vibration during transportation and use, and ensuring the stability of the flexible protective curtain when folded and stored; at the same time, the locking structure does not affect the connecting rod from rotating out as needed, which not only improves the reliability of the structural assembly, but also does not interfere with the normal use of the temporary support function, thus optimizing the overall practicality.

[0020] Optionally, a guide slope is provided on the outer periphery of the positioning protrusion.

[0021] By adopting the above technical solution, the guide slope on the outer periphery of the positioning protrusion plays a guiding role. When the two protective shells rotate and close in opposite directions, the positioning protrusion can smoothly slide into the limiting groove without precise alignment, simplifying the closing and positioning operation of the protective shell. At the same time, the guide slope can reduce the collision and wear between the positioning protrusion and the limiting groove, improve the smoothness of assembly and the service life of the structure, and further ensure the stability of the protective shell's protective state.

[0022] Optionally, an elastic pad is fixed on the inner wall of the wiring notch.

[0023] By adopting the above technical solution, the elastic pad on the inner wall of the wiring notch can fit against the outer circumference of the connecting cable during wiring, avoiding long-term contact between the cable and the inner wall of the notch, which would cause wear on the insulation layer and reduce the risk of leakage and short circuit. During transportation, the elastic pad presses against the sealing plate, enhancing the sealing effect of the notch and reducing the intrusion of external impurities. Its elastic characteristics are adaptable to different specifications of cables, balancing protection and compatibility, and improving reliability in use.

[0024] In summary, this application includes the following beneficial technical effects: After the terminals and connecting cables are connected, rotate the two protective shells towards each other until they are close together in a protective state. Use the positioning protrusions to engage with the limiting grooves to achieve a stable positioning, and then use the locking parts to further fix them so that the protective shells are together fitted over the outside of the switch body and precisely wrap around the terminal area. This effectively prevents mud, water, dust and other impurities splashed from muddy roads from contacting the connection between the terminals and the cables, avoiding problems such as oxidation and corrosion of metal contacts and wear of cable insulation from the source. This ensures the stability of the conductivity of the starting circuit and reduces the risk of starting failure due to poor contact of the starter motor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the overall structure of the mounting and assembly of the terminal block and the switch body in an embodiment of this application; Figure 2 This is a schematic diagram illustrating the installation and assembly of the protective shell according to an embodiment of this application; Figure 3 This is a schematic diagram illustrating the structure of the two protective shells after they are rotated in opposite directions according to an embodiment of this application; Figure 4 This is a schematic diagram illustrating the installation and mating of the elastic pad in an embodiment of this application; Figure 5 This is a schematic diagram illustrating the installation and assembly of the sealing plate and the protective shell in an embodiment of this application; Figure 6 This is a partial structural diagram illustrating the installation and mating of the locking component in an embodiment of this application; Figure 7 This is a schematic diagram illustrating the installation and fit of the connecting rod in an embodiment of this application; Figure 8This is a partial structural diagram illustrating the installation and coordination of the flexible protective curtain in an embodiment of this application; Figure 9 yes Figure 8 An enlarged schematic diagram of part A in the middle; Figure 10 This is a partial cross-sectional structural diagram illustrating the installation and cooperation of the sealing plate and the connecting rod in an embodiment of this application.

[0026] In the diagram, 1. Switch body; 11. Terminal block; 12. Limiting groove; 2. Protective shell; 21. Protective cavity; 22. Mounting port; 23. Wiring notch; 231. Elastic pad; 24. Positioning protrusion; 241. Guide slope; 25. Storage groove; 251. Guide slope; 3. Locking element; 31. Locking rod; 4. Sealing plate; 41. Receiving groove; 411. Traction groove; 412. Positioning groove; 42. Flexible protective curtain; 421. Hook; 43. Connecting rod; 431. Elastic protrusion. Detailed Implementation

[0027] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0028] Reference Figure 1 , Figure 2 and Figure 3 A magnetic switch for starting a car includes a switch body 1 and two terminals 11 fixed to one end of the switch body 1; the switch body 1 has two opposing protective shells 2 on the outer side of the end face facing the terminals 11, and protective cavities 21 for the terminals 11 to be inserted are opened on the side of the two protective shells 2 that are close to each other; the protective shell 2 has a mounting port 22 that communicates with the protective cavity 21 on the side facing the switch body 1, and a locking member 3 is provided on the side away from the switch body 1; The mounting port 22 has a wiring notch 23 on the edge of the opening, a positioning protrusion 24 fixed on the inner wall of the opening, and a guide slope 241 on the outer periphery of the positioning protrusion 24; a limiting groove 12 is provided on the outer edge of the end face of the switch body 1 facing the terminal 11; the two protective shells 2 are rotatably connected by a rotating shaft on the side edges away from the switch body 1, and the two protective shells 2 can rotate towards each other to a protective state that is close to each other and are fixed by a locking member 3; After the magnetic switch and starter are wired, the two protective shells 2 are adjusted to the protective state. At the same time, the positioning protrusion 24 can be inserted into the corresponding limiting groove 12 along the guide slope 241. At this time, the two protective shells 2 are together sleeved on the outside of the switch body 1 to protect the two terminals 11. The two connecting cables can be led out from the wiring notch 23 respectively.

[0029] Reference Figure 4 and Figure 5A sealing plate 4 is rotatably mounted on the inner wall of the wiring notch 23 away from the positioning protrusion 24, and an elastic pad 231 made of rubber is fixed on the inner wall of the wiring notch 23. When the two protective shells 2 are in the protective state and the magnetic switch is being transported, the two sealing plates 4 can rotate towards each other to the sealing state within the wiring notch 23, at which time the elastic pad 231 presses against the sealing plate 4. When the two protective shells 2 are in the protective state and the magnetic switch is being wired, the two sealing plates 4 can rotate away from each other to the coaxial clearance state, and the elastic pad 231 is used to prevent the connecting cable from being worn due to long-term contact with the inner wall of the wiring notch 23.

[0030] Reference Figure 6 and Figure 7 The locking component 3 includes a locking rod 31 rotatably mounted on the side of the protective shell 2 away from the positioning protrusion 24. The rotating surface of the locking rod 31 is parallel to the side of the protective shell 2 away from the positioning protrusion 24. A storage groove 25 is provided on the side of the protective shell 2 away from the positioning protrusion 24, and a guide slope 251 is provided on the opening edge of the storage groove 25. The locking lever 31 can be rotated to a locked state where it is perpendicular to the rotation axis and abuts against the outer side of the adjacent protective shell 2, and rotated to an unlocked state parallel to the rotation axis and fixed. When both locking levers 31 are in the unlocked state, the two protective shells 2 can rotate in opposite directions to a coaxial state, and the locking lever 31 on one of the protective shells 2 rotates into the storage groove 25 on the other protective shell 2 along the guide slope 241.

[0031] Reference Figure 7 , Figure 8 and Figure 9 The sealing plate 4 has a receiving groove 41 on its opposite sides facing the wiring notch 23, and a flexible protective curtain 42 is provided in the receiving groove 41. A connecting rod 43 is rotatably connected to the inner wall of the receiving groove 41. The two connecting rods 43 on the same sealing plate 4 can rotate back to back to a coaxial support state. One side edge of the flexible protective curtain 42 is fixedly connected to the outer circumference of the connecting rod 43, and two hooks 421 are fixedly provided on the other side edge of the flexible protective curtain 42. When the connecting rod 43 rotates into the receiving groove 41, the flexible protective curtain 42 is simultaneously folded and stored in the receiving groove 41. Before the magnetic switch is installed on the starter motor, it needs to be temporarily placed on a damp ground. First, rotate the two protective shells 2 back to back to a coaxial state and rotate the sealing plate 4 to a clearance state. Then, rotate the connecting rod 43 to a support state. At this time, the sides of the two protective shells 2 away from the sealing plate 4 are placed on the ground. The hooks 421 on the two flexible protective curtains 42 on the same side are engaged with each other. Finally, the switch body 1 is placed horizontally between the two sealing plates 4. The four flexible protective curtains 42 provide temporary support for the switch body 1.

[0032] Reference Figure 8 and Figure 10The receiving groove 41 has a traction groove 411 on the opening edge to facilitate the rotation of the connecting rod 43; the connecting rod 43 has a rubber elastic protrusion 431 fixed on its outer periphery, and the receiving groove 41 has a positioning groove 412 on its inner wall; the elastic protrusion 431 is inserted into the positioning groove 412 when the connecting rod 43 is rotated into the receiving groove 41, thereby enhancing the installation stability of the connecting rod 43 in the receiving groove 41.

[0033] The implementation principle of this application embodiment is as follows: Transportation status: The protective shell 2 remains in a protective state, the connecting rod 43 is rotated into the receiving groove 41, the elastic protrusion 431 is snapped into position, the flexible protective curtain 42 is folded and stored, and the locking rod 31 is rotated into the storage groove 25 for easy carrying and transportation; the sealing plate 4 is rotated to the wiring notch 23, and the elastic pad 231 presses against the sealing plate 4 to prevent external impurities from entering.

[0034] Wiring protection status: After wiring is completed, the two protective shells 2 rotate and fit together in opposite directions. The positioning protrusion 24 is fixed by being inserted into the limiting groove 12 along the guide slope 241. The wiring notch 23 allows the cable to be led out. The sealing plate 4 rotates in opposite directions to make room. The elastic pad 231 prevents cable wear and achieves protection for the terminal 11.

[0035] Temporary support state: When temporarily placed in a humid environment, the protective shell 2 is rotated to the coaxial state, the sealing plate 4 is rotated into the wiring notch 23 to the clearance state, and the connecting rod 43 is rotated out to the support state. After the two flexible protective curtains 42 on the same side are unfolded, they are interlocked by the hook 421. At this time, the bottom surface of the protective shell 2 is on the ground, and the switch body 1 is placed between the two sealing plates 4. The flexible protective curtain 42 supports the switch body 1 to keep it horizontal, which facilitates the temporary placement of the switch body 1.

[0036] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A magnetic switch for starting an automobile, comprising a switch body (1) and two terminals (11) fixed to one end of the switch body (1); characterized in that, The switch body (1) has two opposing protective shells (2) on the outer side of the end face facing the terminal (11), and a protective cavity (21) for the terminal (11) to be inserted is provided on the side of the two protective shells (2) that are close to each other. The protective shell (2) has an installation port (22) communicating with the protective cavity (21) on the side facing the switch body (1), and a locking member (3) on the side away from the switch body (1). A wiring notch (23) is provided on the edge of the opening of the installation port (22), and a positioning protrusion (24) is fixed on the inner wall of the opening. A limiting groove (12) is provided on the outer edge of the end face of the switch body (1) facing the terminal (11). The two protective shells (2) are rotatably connected by a rotating shaft on the side edges away from the switch body (1). The two protective shells (2) can rotate towards each other to a protective state that is close to each other and are fixed by a locking member (3). The positioning protrusion (24) can be inserted into the limiting groove (12) when the protective shell (2) is in the protective state. At this time, the two protective shells (2) are together sleeved on the outside of the switch body (1) to protect the two terminals (11).

2. A magnetic switch for starting an automobile according to claim 1, characterized in that, A sealing plate (4) is rotatably installed on the inner wall of the wiring notch (23) away from the positioning protrusion (24). When the two protective shells (2) are in the protective state and the magnetic switch is being transported, the two sealing plates (4) can rotate towards each other to the sealing state within the wiring notch (23). When the two protective shells (2) are in the protective state and the magnetic switch is being wired, the two sealing plates (4) can rotate away from each other to the coaxial clearance state.

3. A magnetic switch for starting an automobile according to claim 2, characterized in that, The locking element (3) includes a locking rod (31) rotatably mounted on the side of the protective shell (2) away from the positioning protrusion (24). The rotating surface of the locking rod (31) is parallel to the side of the protective shell (2) away from the positioning protrusion (24). The locking rod (31) can be rotated to a locked state that is perpendicular to the rotation axis and abuts against the outer side of the adjacent protective shell (2), and rotated to an unlocked state that is parallel to the rotation axis and fixed.

4. A magnetic switch for starting an automobile according to claim 3, characterized in that, The protective shell (2) has a storage groove (25) on the side away from the positioning protrusion (24); when both locking rods (31) are in the unlocked state, the two protective shells (2) can rotate in opposite directions to the coaxial state, and the locking rod (31) on one of the protective shells (2) will then rotate into the storage groove (25) on the other protective shell (2).

5. A magnetic switch for starting an automobile according to claim 4, characterized in that, The storage slot (25) has a guide slope (251) on the opening edge.

6. A magnetic switch for starting an automobile according to claim 4, characterized in that, The sealing plate (4) has a receiving groove (41) on its opposite sides facing the wiring notch (23), and a flexible protective curtain (42) is provided in the receiving groove (41). A connecting rod (43) is rotatably connected to the inner wall of the receiving groove (41). The two connecting rods (43) on the same sealing plate (4) can rotate back to back to a coaxial support state. One side edge of the flexible protective curtain (42) is fixedly connected to the outer circumference of the connecting rod (43). Several hooks (421) are fixed on the other side edge of the flexible protective curtain (42). The flexible protective curtain (42) is folded and stored in the receiving groove (41) at the same time when the connecting rod (43) rotates into the receiving groove (41). When the two protective shells (2) are rotated to a coaxial state and the sealing plate (4) is rotated to a yielding state, the connecting rod (43) is rotated to a supporting state. At this time, the two protective shells (2) are placed on the ground away from the sealing plate (4), and the hooks (421) on the two flexible protective curtains (42) on the same side are engaged with each other. At this time, the switch body (1) is placed horizontally between the two sealing plates (4), and the four flexible protective curtains (42) provide temporary support for the switch body (1).

7. A magnetic switch for starting an automobile according to claim 6, characterized in that, The accommodating groove (41) has a traction groove (411) on the opening edge.

8. A magnetic switch for starting an automobile according to claim 6, characterized in that, An elastic protrusion (431) is fixed on the outer periphery of the connecting rod (43), and a positioning groove (412) is provided on the inner wall of the receiving groove (41) for the elastic protrusion (431) to be inserted.

9. A magnetic switch for starting an automobile according to claim 1, characterized in that, The positioning protrusion (24) has a guide slope (241) on its outer periphery.

10. A magnetic switch for starting an automobile according to claim 1, characterized in that, An elastic pad (231) is fixed on the inner wall of the wiring notch (23).

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