Manual maintenance switch

Abstract

The utility model provides a manual maintenance switch, which is used for controlling a switch of a controlled circuit and comprises a socket and a plug, the plug comprises a cover body, a clamping seat and a smoke and fire switch assembly, the smoke and fire switch assembly comprises a smoke and fire switch device and a first current-carrying piece, and a trigger pin is arranged on the smoke and fire switch device; the socket comprises a base and a limiting seat, two opposite side parts of the limiting seat are respectively provided with a second current-carrying member in a penetrating manner, and the middle part of the limiting seat is provided with a trigger plug in a penetrating manner; when the plug is completely inserted into the socket, the cover body covers the base, the first current-carrying piece is electrically connected with the second current-carrying piece, one end, far away from the first current-carrying piece, of the second current-carrying piece can be electrically connected with a conductor in a controlled circuit through a bolt, and the trigger pin is inserted into the trigger plug and electrically connected with the trigger plug. And one end, far away from the trigger pin, of the trigger plug is used for accessing a control system of a controlled circuit. The manual maintenance switch provided by the utility model has the advantages of smaller heat productivity in the use process, smaller temperature rise of the plug and capability of effectively preventing the plug from being damaged due to high temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a manual maintenance switch. Background Art

[0002] At present, manual maintenance switches are widely used in battery packs such as battery packs for new energy vehicles and battery packs for energy storage. They are usually installed on the high-voltage current-carrying circuit of the battery pack.

[0003] A manual maintenance switch generally includes a plug and a socket. A fuse is provided in the plug, and a conductive structure electrically connected to the fuse is correspondingly provided in the socket. During actual use, the fuse in the plug is electrically connected to the current-carrying circuit of the battery pack, and the conductive structure in the socket is connected to the system equipped with the battery pack. When an abnormal condition occurs in the system equipped with the battery pack, such as a short circuit, the fuse will blow to disconnect the current-carrying circuit of the battery pack, thereby protecting the battery pack. Subsequently, only the plug needs to be replaced to complete the quick replacement of the fuse. When the system equipped with the battery pack needs to be repaired, the current-carrying circuit of the battery pack can be disconnected by removing the plug to avoid electric shock accidents caused by improper operation of the maintenance personnel, thereby ensuring the safety of the maintenance work.

[0004] However, the internal resistance of the fuse used in the existing manual maintenance switch is relatively large, at tens of milliohms, and the heat generated during actual use is relatively large, and the temperature rise is relatively large. The existing plugs are mostly made of plastic, which will soften and deform at high temperatures, and then be damaged by high temperatures, resulting in poor contact between the plug and the socket, and even causing a safety accident of spontaneous combustion of the system equipped with the battery pack. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a manual maintenance switch, which aims to solve the technical problem that during the use of the existing manual maintenance switch, the temperature rise of the fuse is large, causing high-temperature damage to the plug, resulting in poor contact between the plug and the socket, and even causing a safety accident of spontaneous combustion of the system equipped with a battery pack.

[0006] The utility model aims to provide a manual maintenance switch for controlling the switch of a controlled circuit, the manual maintenance switch comprising a plug and a socket detachably connected to the plug, the plug comprising a cover body, a card holder located inside the cover body and connected to the cover body, and a pyrotechnic switch assembly arranged in the card holder, the pyrotechnic switch assembly comprising a pyrotechnic switch and first current-carrying members respectively fixed on two opposite sides of the pyrotechnic switch, and a trigger pin is arranged on the side of the pyrotechnic switch away from the cover body;

[0007] The socket comprises a base, and a limit seat located inside the base and connected to the base, two opposite side portions of the limit seat are respectively provided with second current-carrying parts, the second current-carrying parts are adapted to the first current-carrying parts, and a trigger plug is provided in the middle portion of the limit seat, the trigger plug is adapted to the trigger pin;

[0008] When the plug is fully inserted into the socket, the cover body is placed on the base, the second current-carrying member is inserted into the first current-carrying member and is electrically connected to the first current-carrying member, an end of the second current-carrying member away from the first current-carrying member can be electrically connected to a conductor in the controlled circuit through a bolt, the trigger pin is inserted into the trigger plug and is electrically connected to the trigger plug, and an end of the trigger plug away from the trigger pin is used to access the control system of the controlled circuit.

[0009] Compared with the existing manual maintenance switch, the beneficial effect of the manual maintenance switch of the utility model is that: by arranging a pyrotechnic switch component in the plug as a disconnector of the controlled circuit, compared with the fuse, its internal resistance is smaller, only tens of micro-ohms, and the heat generated during actual use is smaller, and the temperature rise is smaller, which can effectively avoid the situation where the plug is damaged by high temperature, thereby greatly improving the safety of the manual maintenance switch during use. The pyrotechnic switch component can disconnect the controlled circuit within tens of milliseconds, has a fast response speed, and can also realize the active control of the controlled circuit by the control system, and the use performance is significantly improved.

[0010] In addition, the manual maintenance switch according to the utility model may also have the following additional technical features:

[0011] Further, the pyrotechnic switch comprises a mounting shell, a gas source disposed at one end of the mounting shell, and a piston located at the gas outlet of the gas source, the gas source is provided with the trigger pin, a conductive plate is provided on the side of the piston away from the gas source, the conductive plate penetrates the mounting shell, and the first current-carrying member is fixedly provided at both ends of the conductive plate located outside the mounting shell;

[0012] When the electrical signal of the controlled circuit changes beyond a threshold value, the control system triggers the gas emission source through the trigger pin, and the gas emission source generates a propulsion gas, which pushes the piston to move in a direction away from the gas emission source and cuts off the portion of the conductive plate located inside the mounting shell, thereby disconnecting the controlled circuit.

[0013] Furthermore, the trigger plug includes a fixing portion and a plug terminal passing through the fixing portion, the fixing portion is fixed inside the base, and the plug terminal is adapted to the trigger pin.

[0014] Further, the conductive plate includes a first conductive part and a second conductive part, the first conductive part passes through the mounting shell, the first conductive part is located at two ends outside the mounting shell and vertically extends away from the gas emission source with the second conductive part, and the first current-carrying part is fixedly provided on a side of the second conductive part away from the mounting shell.

[0015] Furthermore, a clamping plate portion is extended from the inner top wall of the cover body toward the opening direction of the cover body;

[0016] The card base includes a buckle portion, and two first mounting portions and two first limiting portions arranged on the same side of the buckle portion, and the connection between the card base and the cover body is achieved by the buckle portion and the card plate portion being engaged with each other;

[0017] The two first mounting parts and the two first limiting parts together form a limiting hole, the limiting hole is adapted to the pyrotechnic switch, the first mounting part is penetrated by the first current-carrying part, the first limiting part is provided with a first limiting groove, and the first limiting groove is penetrated by a high-voltage interlocking pin.

[0018] Furthermore, the plug further comprises a first sealing ring, which is sleeved on a circumferential surface of one end of the clamping plate portion that is clamped with the buckle portion.

[0019] Furthermore, two opposite side walls located inside the base are respectively provided with plug-in parts;

[0020] The limiting seat includes a connecting portion and second limiting portions respectively arranged at two ends of one side of the connecting portion, and slots are respectively arranged at two ends of a side of the connecting portion away from the second limiting portion, and the connection between the limiting seat and the base is realized by inserting the plug-in portion into the slots; a second limiting groove is arranged on the second limiting portion, and the second limiting groove is adapted to the first mounting portion, and the second current-carrying member is penetrated through the second limiting groove.

[0021] Furthermore, two second mounting parts are provided inside the base, the trigger plug is provided between the two second mounting parts, the second mounting part is adapted to the first limiting groove, and a high-voltage interlocking socket terminal is passed through the second mounting part, and the high-voltage interlocking socket terminal is adapted to the high-voltage interlocking pin.

[0022] Furthermore, the socket also includes a second sealing ring, which is arranged on the bottom outer wall of the base.

[0023] Furthermore, the manual maintenance switch also includes a handle, which is a U-shaped structure. The two vertical parts of the handle are rotatably connected to the outer walls of both sides of the cover body respectively, and the ends of the two vertical parts connected to the cover body are also respectively provided with locking grooves. The outer walls of the two opposite sides of the base are respectively provided with locking columns adapted to the locking grooves, and the connection between the cover body and the base is achieved by limiting the locking columns in the locking grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural diagram of the manual maintenance switch of the utility model;

[0025] Figure 2 It is a schematic cross-sectional structure diagram of the manual maintenance switch of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a plug in a manual maintenance switch of the utility model;

[0027] Figure 4 This is a diagram of the internal structure of the plug in the manual maintenance switch of the utility model;

[0028] Figure 5 It is an exploded schematic diagram of the plug in the manual maintenance switch of the utility model;

[0029] Figure 6 It is a structural schematic diagram of the socket in the manual maintenance switch of the utility model;

[0030] Figure 7 This is a diagram of the internal structure of the socket in the manual maintenance switch of the utility model;

[0031] Figure 8 It is an exploded schematic diagram of the socket in the manual maintenance switch of the utility model;

[0032] Fig. 9 This is a diagram of the internal structure of the manual maintenance switch of the utility model when the pyrotechnic switch is not triggered;

[0033] Fig.10 The utility model is a diagram of the internal structure of the pyrotechnic switch after the manual maintenance switch is triggered.

[0034] The above drawings include the following reference numerals: 1-plug; 11-cover; 111-card plate; 12-card seat; 121-buckle portion; 122-first mounting portion; 123-first limit portion; 13-firework switch; 131-mounting housing; 132-gas source; 133-piston; 134-conductive plate; 135-trigger pin; 14-first current-carrying member; 15-high-voltage interlocking pin; 16-first sealing ring; 2-socket; 21-base; 211-plug-in part; 22-limiting seat; 221-connecting part; 222-second limiting part; 23-second current-carrying part; 24-trigger plug; 241-fixing part; 242-plug terminal; 251-second mounting part; 252-high-voltage interlocking socket terminal; 26-second sealing ring; 27-bolt; 3-handle; 31-locking groove; 32-locking column; 33-buckle block; 34-buckle groove.

[0035] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] See also Figures 1 to 10The utility model is a manual maintenance switch used to control the switch of a controlled circuit, which includes a plug 1 and a socket 2 detachably connected to the plug 1, the plug 1 includes a cover 11, a card holder 12 located inside the cover 11 and connected to the cover 11, and a pyrotechnic switch assembly arranged in the card holder 12, the pyrotechnic switch assembly includes a pyrotechnic switch 13 and first current-carrying members 14 respectively fixed on two opposite sides of the pyrotechnic switch 13, and a trigger pin 135 is provided on the side of the pyrotechnic switch 13 away from the cover 11;

[0040] The socket 2 includes a base 21, and a limiting seat 22 located inside the base 21 and connected to the base 21, two opposite sides of the limiting seat 22 are respectively penetrated with a second current-carrying member 23, the second current-carrying member 23 is adapted to the first current-carrying member 14, and a trigger plug 24 is penetrated in the middle of the limiting seat 22, and the trigger plug 24 is adapted to the trigger pin 135;

[0041] When the plug 1 is fully inserted into the socket 2, the cover body 11 is covered on the base 21, the second current-carrying member 23 is inserted into the first current-carrying member 14 and electrically connected to the first current-carrying member 14, and the end of the second current-carrying member 23 away from the first current-carrying member 14 can be electrically connected to the conductor in the controlled circuit through the bolt 27, the trigger pin 135 is inserted into the trigger plug 24 and electrically connected to the trigger plug 24, and the end of the trigger plug 24 away from the trigger pin 135 is used to access the control system of the controlled circuit.

[0042] As an example, the pyrotechnic switch 13 includes a mounting shell 131, a gas source 132 disposed at one end of the mounting shell 131, and a piston 133 located at the gas outlet of the gas source 132. The gas source 132 is provided with a trigger pin 135. The piston 133 is provided with a conductive plate 134 on the side away from the gas source 132. The conductive plate 134 penetrates the mounting shell 131. The first current-carrying member 14 is fixedly disposed at both ends of the conductive plate 134 located outside the mounting shell 131. Specifically, the conductive plate 134 includes a first conductive portion and a second conductive portion. The first conductive portion penetrates the mounting shell 131. The first conductive portion is located outside the mounting shell 131. The second conductive portion is vertically extended in a direction away from the gas source 132 at both ends. The first current-carrying member 14 is fixedly disposed on the side of the second conductive portion away from the mounting shell 131.

[0043] As an example, the inner top wall of the cover body 11 extends toward the opening direction of the cover body 11 with a clamping plate portion 111, and the clamping seat 12 includes a buckle portion 121, and two first mounting portions 122 and two first limiting portions 123 arranged on the same side of the buckle portion 121. The connection between the clamping seat 12 and the cover body 11 is achieved by the buckle portion 121 and the clamping plate portion 111. The two first mounting portions 122 and the two first limiting portions 123 are enclosed to form a limiting hole, and the limiting hole is adapted to the pyrotechnic switch 13. In the actual assembly process, the pyrotechnic switch 13 is limited and fixed through the limiting hole, and the pyrotechnic switch 13 can be installed in the clamping seat 12 without fasteners, which greatly improves the convenience of assembly. When the pyrotechnic switch 13 is limited in the limiting hole, the first current-carrying member 14 is respectively penetrated in the first mounting portions 122 located on both sides of the limiting hole. A first limiting groove is formed on a side of the first limiting portion 123 away from the buckle portion 121 , and a high-voltage interlocking pin 15 is inserted into the first limiting groove.

[0044] Furthermore, the plug 1 further comprises a first sealing ring 16 , which is sleeved on a circumferential surface of one end of the clamping plate portion 111 that is clamped with the buckle portion 121 .

[0045] As an example, a trigger plug 24 is provided at the bottom of the base 21. Specifically, the trigger plug 24 includes a fixing portion 241 and a plug terminal 242 inserted into the fixing portion 241. The fixing portion 241 is fixed inside the base 21, and the plug terminal 242 is adapted to the trigger pin 135. Further, two opposite side walls located inside the base 21 are respectively provided with plug-in portions 211. Two opposite side portions of the limit seat 22 are respectively connected with the second current-carrying member 23 through fasteners. In this embodiment, the limit seat 22 includes a connecting portion 221 and second limiting portions 222 respectively provided at two ends of one side of the connecting portion 221. Two ends of the connecting portion 221 on a side away from the second limiting portion 222 are respectively provided with slots, and the connection between the limit seat 22 and the base 21 is realized by inserting the plug-in portion 211 into the slot. A second limiting groove is formed on a side of the second limiting portion 222 away from the connecting portion 221 . The second limiting groove is adapted to the first mounting portion 122 , and one end of the second current-carrying member 23 is passed through the second limiting groove.

[0046] Furthermore, two second mounting portions 251 are provided inside the base 21, and a trigger plug 24 is provided between the two second mounting portions 251. The two second mounting portions 251 and the trigger plug 24 both pass through the middle of the connecting portion 221 and are located between the two second limiting portions 222. The second mounting portion 251 is adapted to the first limiting groove, and a high-voltage interlocking socket terminal 252 is passed through the second mounting portion 251, and the high-voltage interlocking socket terminal 252 is adapted to the high-voltage interlocking pin 15.

[0047] As a specific example, in this embodiment, the first current-carrying member 14 is a current-carrying spring sheet, and the second current-carrying member 23 is a current-carrying plug adapted to the current-carrying spring sheet. In actual use, the electrical connection between the two is achieved by inserting the current-carrying plug into the current-carrying spring sheet. In some embodiments, the first current-carrying member 14 may also be a current-carrying plug sheet, and the second current-carrying member 23 may also be a current-carrying spring sheet. It should be noted that the first current-carrying member and the second current-carrying member in the utility model are not limited to the structural design in the above-mentioned embodiment, and may also be other structural designs that can achieve the purpose of the utility model.

[0048] During the actual assembly process, when the plug 1 is fully inserted into the socket 2, the first mounting portion 122 is inserted into the second limiting groove, and the second current-carrying member 23 located in the second limiting groove is inserted into the first current-carrying member 14 located in the first mounting portion 122 to achieve electrical connection between the second current-carrying member 23 and the first current-carrying member 14; the second mounting portion 251 is inserted into the first limiting groove, and the high-voltage interlocking pin 15 located in the first limiting groove is inserted into the high-voltage interlocking socket terminal 252, and the trigger pin 135 provided on the pyrotechnic switch 13 is correspondingly inserted into the plug terminal 242 of the trigger plug 24 to achieve electrical connection between the trigger pin 135 and the trigger plug 24.

[0049] Furthermore, the socket 2 also includes a second sealing ring 26 , which is disposed on the bottom outer wall of the base 21 .

[0050] Furthermore, the manual maintenance switch of the utility model further comprises a handle 3. As a specific example, in the present embodiment, the handle 3 is a U-shaped structure. The two vertical parts of the handle 3 are respectively rotatably connected to the outer walls of the cover 11. The ends of the two vertical parts connected to the cover 11 are also provided with locking grooves 31. The outer walls of the two opposite sides of the base 21 are respectively provided with locking columns 32 adapted to the locking grooves 31. By rotating the handle 3, the locking columns 32 can be limited in the locking grooves 31, thereby preliminarily locking the cover 11 on the base 21. Furthermore, a buckle block 33 is also provided on one side of the horizontal part of the handle 3 close to the vertical part. A buckle groove 34 adapted to the buckle block 33 is correspondingly provided on one side of the outer wall of the cover 11. When the handle 3 is rotated to the side where the buckle groove 34 is located, the buckle block 33 is snapped into the inside of the buckle groove 34, and the cover 11 is firmly locked on the base 21. When it is necessary to release the locking state between the cover body 11 and the base 21, the buckle block 33 can be manually pushed in the direction of disengaging from the buckle groove 34, and the handle 3 can be rotated toward the top wall of the cover body 11, and finally the locking column 32 is disengaged from the locking groove 31. At this time, the plug 1 can be removed from the socket 2.

[0051] In actual use, the use principle of the manual maintenance switch of the utility model can be: insert the plug 1 into the socket 2, and rotate the handle 3 in the direction of the socket 2 to lock the cover 11 of the plug 1 on the base 21 of the socket 2 to avoid relative displacement between the plug 1 and the socket 2, effectively ensuring the safety of the manual maintenance switch. At this time, the second current-carrying member 23 is inserted into the first current-carrying member 14 and electrically connected to the first current-carrying member 14, the trigger pin 135 is inserted into the trigger plug 24 and electrically connected to the trigger plug 24, and the control system connects the controlled circuit.

[0052] When the controlled circuit is in a normal state, the pyrotechnic switch 13 is not triggered and is in a standby state. Since the internal resistance of the pyrotechnic switch 13 is very small, only tens of micro-ohms, the entire manual maintenance switch can be regarded as a low-resistance conductor. Compared with the manual maintenance switch equipped with a fuse, it generates less heat and has a smaller temperature rise, which can effectively avoid high-temperature damage to the plug 1, thereby ensuring the usability and installability of the manual maintenance switch.

[0053] When an abnormal state occurs in the controlled circuit, that is, when the change of the electrical signal of the controlled circuit exceeds a threshold value, the control system triggers the gas source 132 in the pyrotechnic switch 13 through the trigger pin 135. The gas source 132 generates a propulsion gas to push the piston 133 to move away from the gas source 132 and cut off the first conductive portion on the conductive plate 134 located inside the mounting shell 131 to disconnect the controlled circuit, thereby achieving the purpose of protecting the control system and the battery pack of the controlled circuit.

[0054] When the manual maintenance switch needs to be repaired, the handle 3 can be rotated in the reverse direction to release the locking state of the plug 1 on the socket 2, and then the plug 1 can be pulled out from the socket 2, so that the second current-carrying component 23 is separated from the first current-carrying component 14, and the trigger pin 135 is separated from the trigger plug 24, so that the controlled circuit and the control system are both in a disconnected state, so as to carry out maintenance work, effectively ensuring the safety of maintenance personnel in performing maintenance work.

[0055] In summary, the beneficial effect of the manual maintenance switch of the utility model is that by setting the pyrotechnic switch assembly in the plug as the disconnector of the controlled circuit, compared with the fuse, its internal resistance is smaller, only tens of micro-ohms, and the heat generated in the actual use process is smaller, and the temperature rise is smaller, which can effectively avoid the plug from being damaged by high temperature, thereby greatly improving the safety of the manual maintenance switch in the use process, and the pyrotechnic switch assembly can realize the disconnection of the controlled circuit within tens of milliseconds, with a fast response speed, and can also realize the active control of the controlled circuit by the control system, and the use performance is significantly improved. In addition, in the manual maintenance switch of the utility model, the limit fixation of the pyrotechnic switch assembly on the card seat is realized by the limit hole, the fixation of the card seat in the cover body is realized by the clamping between the clamping plate part and the buckle part, the fixation of the limit seat in the base is realized by inserting the plug part into the slot, and the locking or release of the plug on the socket is realized by rotating the handle. In the whole assembly and fixing process, only the fixation of the second current-carrying part on the limit seat is realized by the fastener, and the assembly is very convenient and easy to disassemble and replace.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A manual maintenance switch for controlling the switch of a controlled circuit, the manual maintenance switch comprising a plug and a socket detachably connected to the plug, characterized in that: The plug includes a cover body, a socket located inside the cover body and connected to the cover body, and a pyrotechnic switch assembly arranged in the socket, the pyrotechnic switch assembly includes a pyrotechnic switch and first current-carrying members respectively fixed on two opposite sides of the pyrotechnic switch, and a trigger pin is provided on the side of the pyrotechnic switch away from the cover body; The socket comprises a base, and a limit seat located inside the base and connected to the base, two opposite side portions of the limit seat are respectively provided with second current-carrying parts, the second current-carrying parts are adapted to the first current-carrying parts, and a trigger plug is provided in the middle portion of the limit seat, the trigger plug is adapted to the trigger pin; When the plug is fully inserted into the socket, the cover body is disposed on the base, the first current-carrying member is electrically connected to the second current-carrying member, an end of the second current-carrying member away from the first current-carrying member can be electrically connected to a conductor in the controlled circuit through a bolt, the trigger pin is inserted into the trigger plug and electrically connected to the trigger plug, and an end of the trigger plug away from the trigger pin is used to access the control system of the controlled circuit.

2. The manual maintenance switch according to claim 1, characterized in that: The pyrotechnic switch comprises a mounting shell, a gas source disposed at one end of the mounting shell, and a piston located at the gas outlet of the gas source, the gas source being provided with the trigger pin, a conductive plate being provided on the side of the piston away from the gas source, the conductive plate penetrating the mounting shell, and the first current-carrying member being fixedly disposed at both ends of the conductive plate located outside the mounting shell; When the electrical signal of the controlled circuit changes beyond a threshold value, the control system triggers the gas emission source through the trigger pin, and the gas emission source generates a propulsion gas, which pushes the piston to move in a direction away from the gas emission source and cuts off the portion of the conductive plate located inside the mounting shell, thereby disconnecting the controlled circuit.

3. The manual maintenance switch according to claim 1, characterized in that: The trigger plug comprises a fixing portion and a plug terminal passing through the fixing portion, the fixing portion is fixed inside the base, and the plug terminal is adapted to the trigger pin.

4. The manual maintenance switch according to claim 2, characterized in that: The conductive plate includes a first conductive part and a second conductive part, the first conductive part passes through the mounting shell, the first conductive part is located at two ends outside the mounting shell and vertically extends away from the gas emission source with the second conductive part, and the first current-carrying part is fixedly provided on a side of the second conductive part away from the mounting shell.

5. The manual maintenance switch according to claim 1, characterized in that: The inner top wall of the cover body is provided with a clamping plate portion extending toward the opening direction of the cover body; The card base includes a buckle portion, and two first mounting portions and two first limiting portions arranged on the same side of the buckle portion, and the connection between the card base and the cover body is achieved by the buckle portion and the card plate portion being engaged with each other; The two first mounting parts and the two first limiting parts together form a limiting hole, the limiting hole is adapted to the pyrotechnic switch, the first mounting part is penetrated by the first current-carrying part, the first limiting part is provided with a first limiting groove, and the first limiting groove is penetrated by a high-voltage interlocking pin.

6. The manual maintenance switch according to claim 5, characterized in that: The plug further comprises a first sealing ring, which is sleeved on a circumferential surface of one end of the clamping plate portion and clamped with the buckle portion.

7. The manual maintenance switch according to claim 5, characterized in that: Two opposite side walls located inside the base are respectively provided with plug-in parts; The limiting seat includes a connecting portion and second limiting portions respectively arranged at two ends of one side of the connecting portion, and slots are respectively arranged at two ends of a side of the connecting portion away from the second limiting portion, and the connection between the limiting seat and the base is realized by inserting the plug-in portion into the slots; a second limiting groove is arranged on the second limiting portion, and the second limiting groove is adapted to the first mounting portion, and the second current-carrying member is penetrated through the second limiting groove.

8. The manual maintenance switch according to claim 7, characterized in that: Two second mounting parts are also provided inside the base, the trigger plug is provided between the two second mounting parts, the second mounting part is adapted to the first limiting groove, and a high-voltage interlocking socket terminal is passed through the second mounting part, and the high-voltage interlocking socket terminal is adapted to the high-voltage interlocking pin.

9. The manual maintenance switch according to claim 7, characterized in that: The socket also includes a second sealing ring, which is arranged on the bottom outer wall of the base.

10. The manual maintenance switch according to claim 1, characterized in that: The manual maintenance switch also includes a handle, which is a U-shaped structure. The two vertical parts of the handle are rotatably connected to the outer walls of the cover body on both sides, and the ends of the two vertical parts connected to the cover body are also respectively provided with locking grooves. The outer walls of the two opposite sides of the base are respectively provided with locking columns adapted to the locking grooves, and the connection between the cover body and the base is achieved by limiting the locking columns in the locking grooves.

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