Relay terminal plugging structure

Abstract

The invention provides a relay terminal plugging structure, and belongs to the technical field of relay equipment, the relay terminal plugging structure comprises a relay body, the relay body is connected with a first wire, the first wire is connected with a front terminal assembly, the front terminal assembly is connected with a rear terminal assembly, the relay terminal plugging structure also comprises a cleaning assembly, and the cleaning assembly comprises a first magnetic ring and a first telescopic air bag; the plugging assembly comprises a push ring and a terminal head, and the terminal head is connected with a telescopic spring; the fire extinguishing assembly comprises a storage cylinder and a telescopic air bag II; the invention has the beneficial effects that the terminal head can be prevented from being accidentally loosened in the use process, the stable effect is ensured, dust attached to the surface of the terminal head can be reduced so as to ensure smooth passing of current, fire extinguishing dry powder in the storage cylinder can be sprayed out and quickly dispersed all around after meeting open fire, uniform spraying of the dry powder is ensured, and the fire extinguishing effect is improved. And therefore, the coverage area is effectively increased, the fire extinguishing effect is improved, and property loss and casualties are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of relay equipment, and in particular to a relay terminal plug-in structure. Background Art

[0002] A relay is an electrical control device. The control end of the relay can be connected to a control signal source, allowing an external circuit to manipulate the state of the relay by controlling the current signal, so that the relay can be used as a switch to switch circuits through remote or automatic control. At the same time, the presence of the relay can achieve isolation between circuits. When the control signal causes the relay to switch, the circuit at the load end is electrically isolated from the circuit at the control end, which helps prevent interference or faults from propagating between the two circuits. The presence of the relay terminals enables it to be used as a key component in electrical systems to achieve remote control, circuit isolation, protection and automation functions, and the plug-in structure of the relay terminals has a greater impact on the implementation of its functions.

[0003] When the relay terminals are plugged in, some dust will adhere to the terminal connection end. When dust adheres to the surface of the relay terminals, an extra layer of medium will be formed between the two contacting metal surfaces. According to the knowledge of physical electricity, this will cause the contact resistance to increase. Long-term use may have a certain impact on the electrical components. Secondly, when the relay passes a large current, a certain amount of heat will be generated at the terminal. If the heat dissipation performance of the plug-in structure is not good, the heat cannot be dissipated in time, which will cause the terminal temperature to be too high, accelerate the aging and oxidation of the terminal, and may even damage the surrounding insulating materials. When overloaded, abnormally connected or the relay fails, the relay terminals will heat up, and in severe cases, it may cause a fire hazard. If it is not discovered and extinguished in time, it may cause more serious losses. How to invent a relay terminal plug-in structure to solve these problems has become an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a relay terminal plug-in structure, which aims to solve the problem that dust adhering to the terminal connection end will cause the contact resistance to increase, and the overheating of the relay terminal will cause a fire hazard. If the fire cannot be extinguished in time, serious losses may be caused.

[0005] The present invention is achieved in that: The present invention provides a relay terminal plug-in structure, comprising a relay body, the relay body is connected to a wire 1, the wire 1 is connected to a front terminal assembly, the front terminal assembly is connected to a rear terminal assembly, and further comprising: A cleaning assembly, the cleaning assembly is connected to the rear terminal assembly, and the cleaning assembly includes a magnetic ring and a telescopic airbag; A plug-in assembly, the plug-in assembly is connected to the front terminal assembly, the plug-in assembly comprises a push ring and a terminal head, and the terminal head is connected to a telescopic spring; A fire extinguishing assembly is connected to the front terminal assembly, and the fire extinguishing assembly includes a storage cylinder and a telescopic airbag.

[0006] Preferably, the front terminal assembly includes a terminal seat and a boss, one end of the terminal seat is fixedly connected to a wire, and the other end of the terminal seat is fixedly connected to the boss, a placement cavity is provided inside the boss, and a plurality of limiting sliding holes distributed in a circular array are provided on the inner wall of the placement cavity.

[0007] Preferably, a plurality of movable holes distributed in a circumferential array are formed at one end of the boss away from the terminal seat, a through hole is formed on the side wall of the boss, the through hole is located on the inner side of the plurality of movable holes, and the movable hole and the through hole are both connected to the placement cavity.

[0008] Preferably, the second telescopic airbag is located inside the placement cavity, one end of the second telescopic airbag is fixedly connected to the inner wall of the placement cavity away from the through hole, the side wall of the second telescopic airbag is fixedly connected with a one-way air inlet pipe, and the one-way air inlet pipe is connected to the boss.

[0009] Preferably, a one-way exhaust hole is provided at one end of the telescopic airbag 2 away from the one-way air inlet pipe, one end of the telescopic airbag 2 is fixedly connected to a storage tube, the storage tube is located on one side of the one-way exhaust hole, a spray hole is provided at one end of the storage tube away from the telescopic airbag 2, and the outer wall of the storage tube is slidably connected to the inner wall of the through hole.

[0010] Preferably, the push ring is sleeved on the outer side of the boss, and one end of the push ring away from the terminal seat is fixedly connected to a magnetic ring 2, and the inner ring of the push ring is fixedly connected to a plurality of support plates corresponding to the limiting sliding holes, and the support plates are slidably connected to the limiting sliding holes.

[0011] Preferably, each of the support plates is fixedly connected to the corresponding terminal head, and the outer wall of the terminal head is provided with a plug-in slot. There are two groups of the plug-in slots, and the two groups of the plug-in slots are rotationally symmetrical about the central axis of the terminal head. The terminal head is located on the inner side of the movable hole.

[0012] Preferably, the telescopic spring is located inside the placement cavity, one end of the telescopic spring is fixedly connected to one end of the terminal head, and the other end of the telescopic spring is fixedly connected to the inner wall of one end of the placement cavity away from the movable hole.

[0013] Preferably, the rear terminal assembly includes a terminal block, a groove is provided at one end of the terminal block, a plurality of slots distributed in a circumferential array are provided on the side wall of the terminal block, each of the slots corresponds to a corresponding terminal head one by one, a conductive sheet is fixedly connected to the inner wall of each slot away from the opening, a limit block corresponding to the plug-in slot is fixedly connected to the inner wall of each slot, an air hole is provided between the side wall of the terminal block and the inner wall of the groove, a diffusion groove is provided on the side wall of the terminal block, and a wire 2 is fixedly connected to one end of the terminal block away from the groove.

[0014] Preferably, one end of the telescopic airbag is fixedly connected to an end of the groove away from the opening, the other end of the telescopic airbag is slidably connected to the inner wall of the groove, the end of the telescopic airbag close to the opening of the groove is fixedly connected to a magnetic ring, and the side wall of the telescopic airbag is fixedly connected with an exhaust pipe, which is located on the inner side of the blowing hole.

[0015] The beneficial effects of the present invention are: 1. During the connection between the terminal seat and the terminal block, the limit card block and the plug-in card slot are positioned to increase the surface friction to prevent the terminal head from accidentally loosening during use, so as to ensure the stability of the terminal head after insertion. At the same time, through the interaction between the magnetic ring 1 and the magnetic ring 2, the gas inside the telescopic airbag 1 can be discharged from the exhaust pipe and blown to the surface of the terminal head through the blowing hole, thereby reducing the adhesion of dust on its surface and reducing the increase of contact resistance to ensure the smooth passage of current.

[0016] 2. When the limit card block melts when encountering an open flame and loses its limit on the plug-in card slot, it can drive the terminal head to move inside the slot, thereby separating the terminal head from the conductive sheet to achieve the effect of automatic power off and prevent the continued expansion of the fire source. At the same time, the telescopic airbag 2 is driven to move by the telescopic spring, so that the compressed gas is discharged to the inside of the storage tube through the one-way exhaust hole. After the gas is transported to the storage tube, the fire extinguishing dry powder can be sprayed out from the spray hole with the flow of air flow, and the concave arc surface of the diffusion groove can promote the rapid dispersion of the dry powder to the surroundings, thereby ensuring the uniform spraying of the dry powder to achieve fire extinguishing treatment at the connection, effectively increase the coverage, improve the fire extinguishing effect, and reduce property losses and casualties. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1It is a schematic diagram of the overall structure of a relay terminal plug-in structure provided by an embodiment of the present invention; Figure 2 is a cross-sectional view of a terminal connection structure of a relay terminal plug-in structure provided in an embodiment of the present invention; Figure 3 It is a schematic diagram of a plug-in assembly structure of a relay terminal plug-in structure provided by an embodiment of the present invention; Figure 4 It is a partial structural cross-sectional view of a plug-in assembly of a relay terminal plug-in structure provided by an embodiment of the present invention; Figure 5 This is a schematic diagram of a terminal seat structure of a relay terminal plug-in structure provided by an embodiment of the present invention; Figure 6 It is a schematic diagram of the internal structure of a boss of a relay terminal plug-in structure provided by an embodiment of the present invention; Figure 7 This is a schematic diagram of the initial structure of a plug-in assembly of a relay terminal plug-in structure provided by an embodiment of the present invention; Figure 8 This is a schematic diagram of a terminal block structure of a relay terminal plug-in structure provided by an embodiment of the present invention; Fig. 9 It is a schematic structural diagram of a cleaning component of a relay terminal plug-in structure provided by an embodiment of the present invention; Fig.10 It is a schematic diagram of a half-section structure of a terminal block of a relay terminal plug-in structure provided by an embodiment of the present invention; Fig.11 It is a schematic diagram of a cross-sectional structure of a terminal block of a relay terminal plug-in structure provided in an embodiment of the present invention; Fig.12 A relay terminal plug-in structure provided by an embodiment of the present invention Figure 2 A schematic diagram of the enlarged structure in the middle.

[0019] In the figure: 1. relay; 2. wire one; 3. front terminal assembly; 31. terminal seat; 32. boss; 33. limit sliding hole; 34. movable hole; 35. through hole; 36. placement cavity; 4. rear terminal assembly; 41. terminal block; 42. slot; 421. limit card block; 43. blowing hole; 44. diffusion slot; 45. groove; 46. conductive sheet; 5. wire two; 6. cleaning assembly; 61. magnetic ring one; 62. telescopic airbag one; 63. exhaust pipe; 7. plug-in assembly; 71. push ring; 72. magnetic ring two; 73. terminal head; 731. plug-in card slot; 74. telescopic spring; 75. support plate; 8. fire extinguishing assembly; 81. storage cylinder; 82. spray hole; 83. telescopic airbag two; 831. one-way air inlet pipe; 832. one-way exhaust hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1, refer to Figure 1-Figure 12 A relay terminal plug-in structure includes a relay body 1, the relay body 1 is connected to a wire 2, the wire 2 is connected to a front terminal assembly 3, the front terminal assembly 3 is connected to a rear terminal assembly 4, and further includes: A cleaning assembly 6, the cleaning assembly 6 is connected to the rear terminal assembly 4, and the cleaning assembly 6 includes a magnetic ring 61 and a telescopic airbag 62; The plug assembly 7 is connected to the front terminal assembly 3, and the plug assembly 7 includes a push ring 71 and a terminal head 73, and the terminal head 73 is connected to a telescopic spring 74; The fire extinguishing assembly 8 is connected to the front terminal assembly 3 , and the fire extinguishing assembly 8 includes a storage cylinder 81 and a telescopic airbag 83 .

[0022] Furthermore, the front terminal assembly 3 includes a terminal seat 31 and a boss 32, one end of the terminal seat 31 is fixedly connected to the wire 2, and the other end of the terminal seat 31 is fixedly connected to the boss 32, a placement cavity 36 is provided inside the boss 32, and a plurality of limiting sliding holes 33 distributed in a circular array are provided on the inner wall of the placement cavity 36; a plurality of movable holes 34 distributed in a circular array are provided on one end of the boss 32 away from the terminal seat 31, and a through hole 35 is provided on the side wall of the boss 32, and the through hole 35 is located on the inner side of the plurality of movable holes 34, and both the movable holes 34 and the through hole 35 are connected to the placement cavity 36.

[0023] The boss 32 is used to place the fire extinguishing component 8: before use, the telescopic airbag 2 83 can be installed inside the placement cavity 36. In the initial state, the telescopic airbag 2 83 is in a normal state, and part of the terminal head 73 is located inside the placement cavity 36. When the terminal seat 31 and the terminal block 41 are docked, the end of the terminal head 73 located on the outside of the boss 32 can be inserted into the corresponding slot 42 first, and the magnetism of the end of the magnetic ring 61 away from the telescopic airbag 1 62 is the same polarity as the magnetism of the end of the magnetic ring 2 72 away from the push ring 71. Such a setting can better help for subsequent cleaning.

[0024] Furthermore, the push ring 71 is sleeved on the outer side of the boss 32, and the end of the push ring 71 away from the terminal seat 31 is fixedly connected with a magnetic ring 72, and the inner ring of the push ring 71 is fixedly connected with a plurality of support plates 75 corresponding to the limiting sliding holes 33, and the support plates 75 are slidably connected to the limiting sliding holes 33; each support plate 75 is fixedly connected to the corresponding terminal head 73, and the outer wall of the terminal head 73 is provided with a plug-in slot 731, and the plug-in slot 731 is provided with two groups, and the two groups of plug-in slots 731 are rotationally symmetrical about the central axis of the terminal head 73, and the terminal head 73 is located on the inner side of the movable hole 34; the telescopic spring 74 is located inside the placement cavity 36, and one end of the telescopic spring 74 is fixedly connected to one end of the terminal head 73, and the other end of the telescopic spring 74 is fixedly connected to the inner wall of the placement cavity 36 away from the movable hole 34.

[0025] The connection between the terminal head 73 and the slot 42: first, an external force is applied to the push ring 71 to gradually move it away from the terminal seat 31. During this process, the push ring 71 drives the support plate 75 to slide inside the limiting slide hole 33 to ensure the stability of the push ring 71 during the movement. At the same time, one end of the terminal head 73 gradually moves away from the boss 32, and the telescopic spring 74 is stretched, and the movement of the support plate 75 makes one end of the telescopic airbag 83 be stretched, thereby driving the storage tube 81 to move toward the end away from the terminal seat 31. At the same time, air is filled into the interior of the telescopic airbag 83 through the one-way air inlet pipe 831, and the gas is stored in the interior of the expanded telescopic airbag 83 for subsequent use. When the push ring 71 moves to the maximum limit, the terminal head 73 is docked with the corresponding slot 42, and then the push ring 71 and the terminal block 41 exert mutual force to ensure that the terminal head 73 is inserted into the slot while the telescopic airbag 83 is in the expanded state. The interior of the slot 42 is positioned by the card connection between the limit card block 421 and the plug-in card slot 731 in this process to increase the surface friction and prevent the terminal head 73 from accidentally loosening during use to ensure the stability of the terminal head 73 after insertion. Finally, one end of the terminal head 73 can be brought into contact with the conductive sheet 46 to complete the plug-in connection process, so that the terminal seat 31 and the terminal block 41 are connected and fixed to each other. The end of the terminal head 73 located in the placement cavity 36 is connected to the corresponding wire in the terminal seat 31 through a conductive wire, and the conductive wire can be stretched and contracted in conjunction with the movement of the telescopic spring 74. When the terminal head 73 and the slot 42 are connected, one end of the terminal block 41 can be sleeved on the outside of the boss 32 to effectively prevent dust, moisture, etc. from entering the interior of the terminal, to prevent dust accumulation from affecting the contact performance, and to effectively prevent the occurrence of problems such as short circuit and corrosion caused by moisture, thereby improving the reliability and service life of the terminal head 73. In addition, the contact surfaces of the terminal head 73 and the plug-in slot 731 can be hardened, such as by using electroplating, chemical plating and other methods to form a layer of metal coating with higher hardness on the surface, such as nickel plating, chrome plating, etc. This can not only improve the wear resistance of the surface and reduce the wear during the plug-in and pull-out process, but also increase the surface roughness to a certain extent, thereby increasing the friction and enhancing the plug-in and pull-out force.

[0026] Reference Figure 8-Figure 11 , further; the rear terminal assembly 4 includes a terminal block 41, one end of the terminal block 41 is provided with a groove 45, the side wall of the terminal block 41 is provided with a plurality of slots 42 distributed in a circumferential array, each slot 42 corresponds to a corresponding terminal head 73, each slot 42 is fixedly connected to a conductive sheet 46 on the inner wall away from the opening, and each slot 42 is fixedly connected to a limit card block 421 corresponding to the plug-in card slot 731 on the inner wall, and a blow-through is provided between the side wall of the terminal block 41 and the inner wall of the groove 45 The air hole 43 and the side wall of the terminal block 41 are provided with a diffusion groove 44, and the end of the terminal block 41 away from the groove 45 is fixedly connected with a wire 25; one end of the telescopic airbag 1 62 is fixedly connected to the end of the groove 45 away from the opening, and the other end of the telescopic airbag 1 62 is slidably connected to the inner wall of the groove 45, and the end of the telescopic airbag 1 62 close to the opening of the groove 45 is fixedly connected to the magnetic ring 1 61, and the side wall of the telescopic airbag 1 62 is fixedly connected with an exhaust pipe 63, and the exhaust pipe 63 is located on the inner side of the blowing hole 43.

[0027] Cleaning of dust on the surface of the terminal head 73 by the telescopic airbag 1 62: During the connection between the terminal head 73 and the slot 42, the interaction force between the magnetic ring 1 61 and the magnetic ring 2 72 can cause the magnetic ring 1 61 to apply pressure to one end of the telescopic airbag 1 62, thereby compressing the telescopic airbag 1 62. At this time, the gas inside the telescopic airbag 1 62 can be discharged from the exhaust pipe 63 due to the squeezing effect, and each blowing hole 43 is located between two adjacent slots 42. Therefore, during the exhaust process of the exhaust pipe 63, the gas can be blown from the blowing hole 43 to the surface of the terminal head 73, thereby reducing the adhesion of dust on its surface and reducing the increase of contact resistance to ensure the smooth passage of current; The limiting card block 421 is made of a material with high elasticity, good recovery performance and low melting point. In this way, during the plugging and unplugging process, the limiting card block 421 can better hold the plug-in card slot 731, provide a larger plug-in and unplugging force, and can still maintain good elasticity after multiple plug-ins and unplugging. The limiting card block 421 can melt itself after encountering an open flame, thereby losing the limit on the plug-in card slot 731. At this time, through the recovery of the telescopic airbag 1 62 and the interaction between the magnetic ring 1 61 and the magnetic ring 2 72, the terminal head 73 can be driven to move inside the slot 42, so that the terminal head 73 is separated from the conductive sheet 46 to achieve the effect of automatic power-off, thereby cutting off the current path in the circuit. The separation of the terminal head 73 can The part of the circuit where a fault may occur is isolated from other normal parts, preventing the fault current from spreading to other intact circuit components. Moreover, when the terminal head 73 is separated from the conductive sheet 46, the circuit is powered off, cutting off the energy source for generating heat. Without continuous current passing through, there will not be a large amount of heat generated by the thermal effect of the current, thereby preventing the fire from spreading further due to the continuous high temperature, avoiding excessive voltage or current from being transmitted to other connected devices through the line, thereby preventing the spread of this chain reaction, interrupting the electrical connection between the faulty circuit and other circuits, limiting the fire to the initial fault area, avoiding the continuous expansion of the fire source, and effectively reducing the spread of the fire and reducing damage to other surrounding components.

[0028] Example 2, refer to Figure 3-Figure 4 , further; the telescopic airbag 2 83 is located inside the placement cavity 36, one end of the telescopic airbag 2 83 is fixedly connected to the inner wall of the placement cavity 36 away from the through hole 35, and the side wall of the telescopic airbag 2 83 is fixedly connected with a one-way air inlet pipe 831, and the one-way air inlet pipe 831 is connected to the boss 32; the end of the telescopic airbag 2 83 away from the one-way air inlet pipe 831 is provided with a one-way exhaust hole 832, one end of the telescopic airbag 2 83 is fixedly connected to the storage tube 81, the storage tube 81 is located on one side of the one-way exhaust hole 832, and the end of the storage tube 81 away from the telescopic airbag 2 83 is provided with a spray hole 82, and the outer wall of the storage tube 81 is slidably connected to the inner wall of the through hole 35.

[0029] The fire extinguishing assembly 8 extinguishes the fire source of the terminal after the fire: when the limit card block 421 melts after encountering an open flame, it loses the limit on the plug-in card slot 731. At this time, the elastic recovery of the telescopic spring 74 can drive one end of the telescopic airbag 83 to move toward the side of the terminal seat 31. During the movement, the gas inside the telescopic airbag 83 is compressed. Due to the increase in its internal pressure, the compressed gas is discharged to the inside of the storage tube 81 through the one-way exhaust hole 832. The storage tube 81 stores fire extinguishing dry powder. When the gas is transported to the storage tube 8 1, the accumulated dry powder will be blown away first, and the gas will flow quickly by increasing the pressure, and the fire extinguishing dry powder will be uniformly sprayed out from the multiple spray holes 82. After being sprayed out, the fire extinguishing dry powder will quickly form a covering layer on the surface of the burning electrical equipment. This covering layer can effectively isolate the burning material from the surrounding oxygen, thereby preventing the combustion reaction from continuing. The covering effect of the dry powder is like a firewall, which limits the flame to the area where the fire started initially and prevents the fire from spreading to the entire electrical system, thereby achieving fire extinguishing treatment at the connection; Furthermore, after the dry powder is sprayed out from the spray hole 82, it can be ejected toward the inside of the diffusion groove 44. The concave arc surface of the diffusion groove 44 can promote the dry powder to be quickly dispersed to the surroundings, thereby ensuring uniform spraying of the dry powder, effectively increasing the coverage area, and further improving the fire extinguishing effect.

[0030] It should be noted that the specific model and specifications of each component need to be selected and determined based on the actual specifications of the device, and the specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A relay terminal plug-in structure, comprising a relay body (1), the relay body (1) being connected to a wire 1 (2), the wire 1 (2) being connected to a front terminal assembly (3), the front terminal assembly (3) being connected to a rear terminal assembly (4), characterized in that: Also includes: A cleaning assembly (6), the cleaning assembly (6) being connected to the rear terminal assembly (4), the cleaning assembly (6) comprising a magnetic ring (61) and a telescopic airbag (62); A plug-in assembly (7), the plug-in assembly (7) being connected to the front terminal assembly (3), the plug-in assembly (7) comprising a push ring (71) and a terminal head (73), the terminal head (73) being connected to a telescopic spring (74); A fire extinguishing assembly (8), the fire extinguishing assembly (8) being connected to the front terminal assembly (3), the fire extinguishing assembly (8) comprising a storage cylinder (81) and a second telescopic airbag (83).

2. A relay terminal plug-in structure according to claim 1, characterized in that: The front terminal assembly (3) comprises a terminal seat (31) and a boss (32); one end of the terminal seat (31) is fixedly connected to the wire 1 (2); the other end of the terminal seat (31) is fixedly connected to the boss (32); a placement cavity (36) is provided inside the boss (32); and a plurality of limiting sliding holes (33) distributed in a circumferential array are provided on the inner wall of the placement cavity (36).

3. A relay terminal plug-in structure according to claim 2, characterized in that: A plurality of movable holes (34) distributed in a circumferential array are formed at one end of the boss (32) away from the terminal seat (31), a through hole (35) is formed on the side wall of the boss (32), the through hole (35) is located inside the plurality of movable holes (34), and the movable holes (34) and the through hole (35) are both connected to the placement cavity (36).

4. A relay terminal plug-in structure according to claim 3, characterized in that: The second telescopic airbag (83) is located inside the placement cavity (36), one end of the second telescopic airbag (83) is fixedly connected to the inner wall of the placement cavity (36) at one end away from the through hole (35), and a one-way air inlet pipe (831) is fixedly connected to the side wall of the second telescopic airbag (83), and the one-way air inlet pipe (831) is connected to the boss (32).

5. A relay terminal plug-in structure according to claim 4, characterized in that: A one-way exhaust hole (832) is provided at one end of the second telescopic airbag (83) away from the one-way air inlet pipe (831); one end of the second telescopic airbag (83) is fixedly connected to a storage cylinder (81); the storage cylinder (81) is located on one side of the one-way exhaust hole (832); a spray hole (82) is provided at one end of the storage cylinder (81) away from the second telescopic airbag (83); and an outer wall of the storage cylinder (81) is slidably connected to an inner wall of the through hole (35).

6. A relay terminal plug-in structure according to claim 2, characterized in that: The push ring (71) is sleeved on the outer side of the boss (32); one end of the push ring (71) away from the terminal seat (31) is fixedly connected to the second magnetic ring (72); the inner ring of the push ring (71) is fixedly connected to a plurality of support plates (75) corresponding to the limiting sliding holes (33); and the support plates (75) are slidably connected to the limiting sliding holes (33).

7. A relay terminal plug-in structure according to claim 6, characterized in that: Each of the support plates (75) is fixedly connected to a corresponding terminal head (73), an outer wall of the terminal head (73) is provided with a plug-in slot (731), two groups of the plug-in slots (731) are provided, the two groups of the plug-in slots (731) are rotationally symmetrical about a central axis of the terminal head (73), and the terminal head (73) is located on the inner side of the movable hole (34).

8. A relay terminal plug-in structure according to claim 7, characterized in that: The telescopic spring (74) is located inside the placement cavity (36), one end of the telescopic spring (74) is fixedly connected to one end of the terminal head (73), and the other end of the telescopic spring (74) is fixedly connected to the inner wall of one end of the placement cavity (36) away from the movable hole (34).

9. A relay terminal plug-in structure according to claim 1, characterized in that: The rear terminal assembly (4) comprises a terminal block (41), one end of which is provided with a groove (45), a side wall of which is provided with a plurality of slots (42) distributed in a circumferential array, each of which corresponds to a corresponding terminal head (73) in a one-to-one manner, an inner wall of each of which is away from the opening is fixedly connected with a conductive sheet (46), an inner wall of each of which is fixedly connected with a limit card block (421) corresponding to the plug-in card slot (731), an air hole (43) is provided between the side wall of the terminal block (41) and the inner wall of the groove (45), a diffusion groove (44) is provided on the side wall of the terminal block (41), and one end of the terminal block (41) away from the groove (45) is fixedly connected with a second conductor (5).

10. A relay terminal plug-in structure according to claim 9, characterized in that: One end of the telescopic airbag 1 (62) is fixedly connected to an end of the groove (45) away from the opening, the other end of the telescopic airbag 1 (62) is slidably connected to the inner wall of the groove (45), the end of the telescopic airbag 1 (62) close to the opening of the groove (45) is fixedly connected to the magnetic ring 1 (61), and the side wall of the telescopic airbag 1 (62) is fixedly connected to an exhaust pipe (63), and the exhaust pipe (63) is located on the inner side of the blowing hole (43).

Images