A manually serviceable switch

Abstract

The application discloses a kind of manual maintenance switches, including plug assembly and socket assembly, handle is equipped on the plug assembly, plug assembly and socket assembly cooperate, plug assembly and socket assembly are connected by handle, and complete twice locking by handle, the socket assembly is equipped with latch structure.The socket bottom of the application is equipped with latch structure, latch structure is located in the force direction of socket contact female piece, latch structure is introduced by slide rail on socket shell, first fixed lug and second fixed lug on socket assembly lock up latch structure, and firmly limit it, at this time, power component is also stably fixed in socket shell due to baffle, latch structure can provide stable anti-retrograde jacking force for socket contact female piece, avoid the deformation caused by the lack of anti-retrograde jacking force of socket contact female piece, compared with improve the service life of socket contact female piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric passenger cars, in particular to a manual maintenance switch. BACKGROUND

[0002] The manual maintenance switch is used for disconnecting the high-voltage system connection of the electric vehicle in transportation, maintenance or emergency, opening and closing the control of the energy storage system, and ensuring the safety of the electric vehicle.

[0003] The Chinese patent with the publication number CN206574623U discloses a novel maintenance switch, which comprises a plug upper shell, a socket upper shell cover, and a plug handle for connecting the plug upper shell and the socket upper shell cover. The plug handle further comprises a plug secondary locking block and a plug upper shell buckle connection to form a secondary locking. The plug upper shell further comprises a plug upper shell delay spring sheet. When the plug upper shell delay spring sheet is pressed, the plug upper shell is separated from the socket upper shell cover. However, in the patent, one end of the socket contact female sheet end is connected with the sheet type fuse, and the other end of the socket contact female sheet end is bent by 90° and is screw-connected with the socket upper shell cover. When the socket contact female sheet end is connected with the sheet type fuse, a pushing force is generated for the socket contact female sheet end. The pushing force directly acts on the socket contact female sheet, and the socket contact female sheet has no support in the direction of the pushing force, so that the socket contact female sheet is easily deformed, and the service life of the socket contact female sheet is greatly reduced. SUMMARY

[0004] In view of the above problems, the present application provides a manual maintenance switch, which solves the technical problem that the socket contact female sheet lacks support in the direction of the pushing force, is easily deformed, and has a greatly reduced service life.

[0005] The technical scheme of the present application is as follows: a manual maintenance switch comprises a plug assembly and a socket assembly. A handle is arranged on the plug assembly. The plug assembly and the socket assembly are matched and connected through the handle. The plug assembly and the socket assembly are locked twice through the handle. A latch structure is arranged on the socket assembly.

[0006] The plug assembly comprises a plug shell. A fixing shaft and a primary locking protrusion are arranged on the plug shell. The socket assembly comprises a socket shell. A delay shaft is arranged on the socket shell. A delay hole, a handle pressing plate, and a rotating hole are arranged on the handle. A primary locking hook is arranged on the handle pressing plate. The fixing shaft is rotationally connected with the rotating hole. The delay hole is matched with the delay shaft. The primary locking protrusion and the primary locking hook are clamped to complete the first locking.

[0007] The handle is slidably connected with a secondary locking component, the secondary locking component comprises a secondary locking protrusion, the plug shell is provided with a secondary locking groove, the secondary locking protrusion and the secondary locking groove are matched to complete the second locking.

[0008] The secondary locking component comprises a secondary locking baffle, the secondary locking baffle is provided with a spring buckle; the handle is provided with a limiting groove, the side wall of the limiting groove is provided with a clamping groove, the secondary locking baffle and the limiting groove are inserted and matched, the spring buckle and the clamping groove are slidably matched, and the secondary locking protrusion is located on the secondary locking baffle.

[0009] One end of the secondary locking baffle is connected with a fixing plate, the other end of the secondary locking baffle is provided with a guide groove, the fixing plate is connected with a positioning plate, and the positioning plate is provided with an anti-skid pattern; the handle is provided with a guide rail, the guide rail is located in the middle of the bottom surface of the limiting groove, and the guide rail and the guide groove are slidably matched.

[0010] The plug assembly further comprises a power plug pin, a plug sealing ring, a plug cover plate and an interlocking plug pin component, the outer side of the plug cover plate is provided with a cover plate buckle, the plug shell is provided with a plug buckle in the inside, the cover plate buckle and the plug buckle are buckled to install the plug cover plate in the plug shell, the plug sealing ring and the power plug pin are located between the plug shell and the plug cover plate, the top surface of the plug cover plate is provided with a protrusion, the power plug pin is provided with a through hole, the protrusion penetrates through the through hole to fix the power plug pin, the plug part of the power plug pin extends out of the plug cover plate, the plug cover plate is provided with a fence, the plug cover plate in the fence is provided with a fixing shell, and the fixing shell is matched and buckled with the interlocking plug pin component.

[0011] The socket shell is provided with a socket contact female piece in the inside, the socket shell and the socket contact female piece are inserted and matched, the end of the socket contact female piece is inserted and matched with the power plug pin, and the socket contact female piece is buckled with the latch structure.

[0012] The latch structure comprises a middle plate and a baffle, the baffles are arranged on the two sides of the middle plate, the middle plate is provided with a sliding groove, the bottom of the socket shell is provided with a groove, the groove is provided with a sliding rail in the inside, the sliding groove and the sliding rail are slidably connected, an open groove is arranged between the middle plate and the baffle, the open groove is matched with the socket contact female piece, and the socket contact female piece is in contact with and abuts against the top of the baffle.

[0013] The baffle is provided with a first fixing protrusion, the bottom of the socket shell is provided with a second fixing protrusion, the first fixing protrusion is matched with the second fixing protrusion, and the connection between the latch structure and the socket shell is completed.

[0014] The socket assembly further comprises an interlocking jack component, an embedded nut and a square nut, the jack component is located in the inside of the socket shell, one end of the jack component is connected with a controller, the other end of the jack component is inserted and matched with the interlocking plug pin component, the shell of the jack component is inserted and matched with the fence; the bottom of the socket shell is provided with a countersunk hole, and the embedded nut and the square nut are arranged in the countersunk hole.

[0015] The socket assembly of the present application is provided with a latch structure, which is located in the force direction of the socket contact female piece, is introduced through the slide rail on the socket shell, is locked and firmly limited by the first and second fixed protrusions on the socket assembly, and at this time, the power component is also stably fixed in the socket shell due to the baffle. The latch structure can provide stable anti-backout tightening force for the socket contact female piece, avoids the deformation of the socket contact female piece caused by the lack of anti-backout tightening force, improves the service life of the socket contact female piece, and solves the technical problem that the socket contact female piece in the prior art lacks support in the push-out direction, is easily deformed, and greatly reduces the service life of the socket contact female piece. The present application has a segmented unlocking and two-stage separation structure form, and the two-stage separation structure can effectively prevent the power terminal from being pulled out too fast to form an arc, damage the device, and injure the operator. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is the exploded view of the present application.

[0018] Figure 2 is the perspective view of the present application.

[0019] Figure 3 is the schematic view of the secondary lock component of the present application.

[0020] Figure 4 is the schematic view of the handle of the present application.

[0021] Figure 5 is the connection schematic view of the secondary lock component and the handle of the present application Figure 1 .

[0022] Figure 6 is the connection schematic view of the secondary lock component and the handle of the present application Figure 2 .

[0023] Figure 7 is the connection cross-sectional view of the plug shell and the handle of the present application.

[0024] Figure 8 is the cross-sectional view of the plug assembly of the present application.

[0025] Figure 9 is the cross-sectional view of the socket assembly of the present application.

[0026] Figure 10 The socket assembly of the present application is connected with the plug structure Figure 1 .

[0027] Figure 11 The socket assembly of the present application is connected with the plug structure Figure 2 .

[0028] Figure 12 The bottom view of the present application.

[0029] Figure 13 The plug structure of the present application.

[0030] Figure 14 The locked state of the present application Figure 1 .

[0031] Figure 15 The locked state of the present application Figure 2 .

[0032] Figure 16 The primary unlocking and first separation state of the present application Figure 1 .

[0033] Figure 17 The primary unlocking and first separation state of the present application Figure 2 .

[0034] Figure 18 The secondary unlocking and second separation state of the present application Figure 1 .

[0035] Figure 19 The secondary unlocking and second separation state of the present application Figure 2 .

[0036] In the figure, 1 handle, 2 second locking component, 3 plug shell, 4 power pin, 5 plug sealing ring, 6 plug cover plate, 7 interlocking pin component, 8 jack component, 9 embedding nut, 10 socket sealing ring, 11 socket shell, 12 plug structure, 13 square nut, 14 socket contact female piece, 15 sliding rail, 16 second fixed lug, 17 first fixed lug, 18 baffle, 19 delay shaft, 20 groove, 21 sliding groove, 22 elastic buckle, 23 guide groove, 24 second locking lug, 25 second locking groove, 26 fixed shaft, 27 handle pressing plate, 28 delay hole, 29 first locking lug, 30 positioning plate, 31 guide rail, 32 clamping groove, 33 plug lug, 34 socket lug, 35 rotating hole, 36 fixed plate, 37 second locking baffle, 38 first locking hanging buckle, 39 limiting groove, 40 observation hole, 41 fence, 42 middle plate, 43 buckle, 44 lug. DETAILED DESCRIPTION

[0037] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the scope of the present application.

[0038] As Figure 1 , Figure 12 and Figure 13 shown, a manual maintenance switch includes a plug assembly and a socket assembly, the plug assembly is provided with a handle 1, the plug assembly and the socket assembly are matched, and the plug assembly and the socket assembly are connected through the handle 1, the plug assembly and the socket assembly complete twice locking through the handle 1, and the socket assembly is provided with a latch structure 12. The socket bottom of the present application is provided with the latch structure 12, the latch structure 12 is located in the force direction of the socket contact female piece, the latch structure 12 is introduced through the slide rail 15 on the socket shell 11, after the first fixed lug 17 and the second fixed lug 16 lock the latch structure 12, the latch structure 12 will be firmly limited, at this time, the power component is also stably fixed in the socket shell 11 due to the baffle, the latch structure 12 can provide stable anti-backout jacking force for the socket contact female piece 14, avoids the deformation of the socket contact female piece 14 caused by the lack of anti-backout jacking force, compared with, improves the service life of the socket contact female piece, solves the technical problem that the socket contact female piece in the prior art lacks support in the push-out direction, which causes the socket contact female piece to be easily deformed and greatly reduces the service life of the socket contact female piece. The present application has a segmented unlocking, two-stage separation structure form, and two-stage separation structure can effectively prevent the power terminal from being pulled out too fast to form an arc, damage the device, and injure the operator.

[0039] As Figure 2 , Figure 4 , Figure 7 and Figure 18As shown, the plug assembly comprises a plug housing 3, the plug housing 3 is provided with a fixed shaft 26 and a primary locking protrusion 29, the socket assembly comprises a socket housing 11, the socket housing 11 is provided with a delay shaft 19, the handle 1 is respectively provided with a delay hole 28, a handle pressing plate 27 and a rotating hole 35, the handle pressing plate 27 is provided with a primary locking hook 38, the fixed shaft 26 is rotationally connected with the rotating hole 35, the delay hole 28 is matched with the delay shaft 19, and the primary locking protrusion 29 and the primary locking hook 38 are clamped to complete the first locking. The plug assembly is provided with a plug protrusion 33, the socket assembly is provided with a socket protrusion 34, and the plug assembly and the socket assembly are connected through the clamping of the plug protrusion 33 and the socket protrusion 34. The plug protrusion 33 is arranged at the inner side of the bottom of the plug housing 3, the plug protrusion 33 is fixed on one side of the plug housing 3, the plug protrusion 33 and the side wall of the plug housing 3 form a secondary locking lever, the plug protrusion 33 on the secondary locking lever is clamped with the socket protrusion 34, the connection of the plug assembly and the socket assembly is completed, when the plug assembly and the socket assembly need to be separated, the end of the secondary locking lever away from the plug protrusion 33 is pressed, that is, the top of the side wall of the plug housing 3 is pressed, so that the side wall of one end of the plug protrusion 33 is slightly deformed, the plug protrusion 33 is separated from the socket protrusion 34, and then the plug assembly and the socket assembly are separated.

[0040] As Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 18As shown, the handle 1 is provided with a secondary locking component 2, which is a connector position assurance member; the secondary locking component 2 includes a secondary locking protrusion 24, and the plug housing 3 is provided with a secondary locking groove 25, and the secondary locking protrusion 24 and the secondary locking groove 25 cooperate to complete the second locking. The secondary locking component 2 includes a secondary locking baffle 37, and the secondary locking baffle 37 is provided with a spring buckle 22; the handle 1 is provided with a limiting groove 39, and the side wall of the limiting groove 39 is provided with a clamping groove 32, the secondary locking baffle 37 and the limiting groove 39 are inserted and matched, the spring buckle 22 and the clamping groove 32 are slidingly matched, and the secondary locking protrusion 24 is located on the secondary locking baffle 37. One end of the secondary locking baffle 37 is connected with a fixed plate 36, the other end of the secondary locking baffle 37 is provided with a guide groove 23, the fixed plate 36 is connected with a positioning plate 30, and the positioning plate 30 is provided with anti-skid patterns; the handle 1 is provided with a guide rail 31, and the guide rail 31 is located in the middle of the bottom surface of the limiting groove 39, and the guide rail 31 and the guide groove 23 are slidingly matched. The spring buckle 22 makes the locking and unlocking damping feeling and the obvious jerk feeling clear, and effectively distinguishes whether the lock is locked or not. The guide groove 23 guarantees the correct path of the secondary locking component 2. When the secondary locking component locks the handle 1, on the one hand, the secondary locking protrusion 24 on the secondary locking baffle 37 is clamped with the secondary locking groove 25 to complete the locking, so that the handle 1 is in the locked state, and the risk of transverse movement of the secondary locking component 2 is reduced, and on the other hand, the secondary locking baffle 37 is filled between the handle 1 and the handle pressing plate 27, so that the handle pressing plate 27 is downwardly deformed, further making the primary locking protrusion 29 and the primary locking hook 38 clamped more tightly, reducing the risk of transverse movement of the secondary locking component 2, and reducing the risk of separation of the primary locking protrusion 29 and the primary locking hook 38.

[0041] As Figure 1 and Figure 8As shown, the plug assembly further comprises a power pin 4, a plug sealing ring 5, a plug cover plate 6 and an interlocking pin component 7. The plug cover plate 6 is externally provided with a cover plate buckle 43, and the plug housing 3 is internally provided with a plug buckle 45. The cover plate buckle 43 and the plug buckle 45 are buckled to mount the plug cover plate 6 in the plug housing 3. The plug sealing ring 5 and the power pin 4 are both located between the plug housing 3 and the plug cover plate 6. The plug cover plate 6 is provided with a protrusion 44 on the top surface, and the power pin 4 is provided with a through hole. The protrusion 44 penetrates through the through hole to fix the power pin 4. The plug part of the power pin 4 extends out of the plug cover plate 6. The plug cover plate 6 is provided with a fence 41. The plug cover plate 6 in the fence 41 is provided with a fixing shell 46. The fixing shell 46 is buckled with the interlocking pin component 7. The plug sealing ring 5 can form an internal sealed cavity after the plug housing 3 and the socket housing 11 are matched. The socket housing 11 is provided with a socket sealing ring 10. The socket sealing ring 10 can form a sealing layer between the socket housing 11 and the installation interface. The mutual cooperation can prevent water and gas from entering to a certain extent and protect the powered devices. The fence 41 is arranged on the plug cover plate 6, and the interlocking pin component 7 is buckled in the fence 41. The small interlocking pin is protected from being damaged by external force, and the complete function of high-voltage interlocking can be further maintained.

[0042] As shown in Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 , the socket housing 11 is internally provided with a socket contact female piece 14. The socket housing 11 is buckled with the socket contact female piece 14. The end of the socket contact female piece 14 is buckled with the power pin 4. The socket contact female piece 14 is buckled with the latch structure 12. The latch structure 12 comprises a middle plate 42 and a baffle 18. The baffle 18 is arranged on both sides of the middle plate 42. The middle plate 42 is provided with a sliding groove 21. The bottom of the socket housing 11 is provided with a groove 20. The groove 20 is internally provided with a sliding rail 15. The sliding groove 21 is slidingly connected with the sliding rail 15. An open slot is arranged between the middle plate 42 and the baffle 18. The open slot is matched with the socket contact female piece 14. The socket contact female piece 14 is in contact with and abuts against the top of the baffle 18. The baffle 18 is provided with a first fixing protrusion 17. The bottom of the socket housing 11 is provided with a second fixing protrusion 16. The first fixing protrusion 17 is matched with the second fixing protrusion 16 to complete the connection of the latch structure 12 and the socket housing 11. The latch structure 12 is introduced through the sliding rail 15 on the socket housing 11. After the first fixing protrusion 17 and the second fixing protrusion 16 are locked, the latch structure 12 is firmly limited. At this time, the power component is stably fixed in the socket housing 11 due to the baffle. The latch structure 12 can provide stable anti-backout clamping force for the socket contact female piece 14.

[0043] As shown in Figure 1 and Figure 8As shown, the socket assembly further comprises interlocking jack part 8, embedded nut 9 and square nut 13. The interlocking jack part 8 is located inside the socket shell 11, one end of the interlocking jack part 8 is connected to the controller, the other end of the interlocking jack part 8 is in plug-in cooperation with the interlocking pin part 7, the housing of the interlocking jack part 8 is in plug-in cooperation with the fence 41; the bottom of the socket shell 11 is provided with a countersunk hole, the embedded nut 9 and the square nut 13 are arranged in the countersunk hole. The socket contact female blade 14 is provided with a through hole, the through hole is concentric with the countersunk hole, and the bolt is inserted from the countersunk hole to fix the socket contact female blade 14 on the socket shell 11. When the plug assembly and the socket assembly are plugged and locked, the socket contact female blade 14 first contacts and plugs with the power pin 4, and then the interlocking jack part 8 and the interlocking pin part 7 are plugged. When the plug assembly and the socket assembly are separated, the interlocking jack part 8 and the interlocking pin part 7 are separated first, and then the socket contact female blade 14 is separated from the power pin 4. When the interlocking jack part 8 and the interlocking pin part 7 are separated, the controller connected with the interlocking jack part 8 controls the entire circuit to be powered off, and then the socket contact female blade 14 is separated from the power pin 4, effectively preventing the power terminal from being pulled out too fast to form an arc, damage the device, and injure the operator. The tail of the interlocking jack part 8 is connected with two signal lines, and the two signal lines are connected with the controller to form a loop. When the pin part 7 is inserted into the interlocking jack part 8, the loop is conducted to transmit an electrical signal to the controller. When the pin part 7 is separated from the interlocking jack part 8, the loop is disconnected, and the controller controls the entire circuit to be powered off.

[0044] When the embodiment is implemented, first, the secondary locking part 2 is matched with the handle 1 to form a primary locking structure, then the plug assembly and the socket assembly are assembled in sequence to form a plug assembly and a socket assembly. When locking, first, the secondary locking part 2 is moved to its unlocked position, then the plug assembly and the socket assembly are plugged to form a secondary locking structure, and then the plug protrusion 33 and the socket protrusion 34 are clamped, the handle 1 is pressed down to rotate the handle 1 around the fixed shaft 26 until the primary locking protrusion 29 and the primary locking hook 38 are locked, the handle 1 is stopped, then the secondary locking part 2 is moved to the locked position, at this time, the secondary locking protrusion 24 is in contact with the secondary locking groove 25 on the plug shell 3 to be clamped. Figure 14 and Figure 15 As shown, first, the secondary locking part 2 is moved to its unlocked position, the primary locking structure is separated, at this time, the secondary locking protrusion 24 is separated from the secondary locking groove 25 on the plug shell 3, the secondary locking baffle 37 no longer presses the handle pressing plate 27, the handle pressing plate 27 is lifted up, the primary locking protrusion 29 and the primary locking hook 38 are separated, the handle 1 is lifted up and rotated to about 60° to complete the initial unlocking, the first separation. Figure 16 and Figure 17As shown; at this time, the high-voltage interlocking signal terminal is disconnected, that is, the jack component 8 is separated from the interlocking pin component 7, but the socket contact female piece 14 is still in contact with the power pin 4, the pressing of the plug housing 3 makes the plug lug 33 separated from the socket lug 34, that is, the secondary locking structure is separated, and the plug assembly is pulled out, that is, the secondary unlocking and secondary separation are completed. Figure 18 and Figure 19 As shown.

[0045] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A manual maintenance switch, comprising a plug assembly and a socket assembly, characterized in that, The plug assembly is provided with a handle (1). The plug assembly and the socket assembly cooperate with each other and are connected by the handle (1). The handle (1) is used to complete two locking operations. The socket assembly is provided with a pin structure (12). The plug assembly includes a plug housing (3). The plug housing (3) is provided with a fixed shaft (26) and a first locking protrusion (29). The socket assembly includes a socket housing (11). The socket housing (11) is provided with a delay shaft (19). The handle (1) is provided with a delay hole (28), a handle pressure plate (27), and a rotating hole (35). The handle pressure plate (27) is provided with a first locking hook (38). The fixed shaft (26) is rotatably connected to the rotating hole (35). The delay hole (28) cooperates with the delay shaft (19). The first locking protrusion (29) and the first locking hook (38) are locked together to complete the first locking operation. One-time locking; the pin structure (12) includes a middle plate (42) and a baffle (18). The baffle (18) is provided on both sides of the middle plate (42). The middle plate (42) is provided with a sliding groove (21). The bottom of the socket housing (11) is provided with a groove (20). The groove (20) is provided with a slide rail (15). The sliding groove (21) is slidably connected to the slide rail (15). An opening groove is provided between the middle plate (42) and the baffle (18). The opening groove cooperates with the socket contact mother plate (14). The socket contact mother plate (14) contacts and abuts against the top of the baffle (18). The baffle (18) is provided with a first fixing protrusion (17). The bottom of the socket housing (11) is provided with a second fixing protrusion (16). The first fixing protrusion (17) and the second fixing protrusion (16) cooperate to complete the connection between the pin structure (12) and the socket housing (11).

2. The manual maintenance switch according to claim 1, characterized in that, The handle (1) is slidably connected to a secondary locking component (2), which includes a secondary locking protrusion (24) and a secondary locking groove (25) on the plug housing (3). The secondary locking protrusion (24) and the secondary locking groove (25) cooperate to complete the second locking.

3. The manual maintenance switch according to claim 2, characterized in that, The secondary locking component (2) includes a secondary locking baffle (37), on which a spring buckle (22) is provided; the handle (1) is provided with a limiting groove (39), and a slot (32) is provided on the side wall of the limiting groove (39). The secondary locking baffle (37) and the limiting groove (39) are inserted into each other, and the spring buckle (22) and the slot (32) are slidably engaged. The secondary locking protrusion (24) is located on the secondary locking baffle (37).

4. The manual maintenance switch according to claim 3, characterized in that, One end of the secondary locking baffle (37) is connected to a fixing plate (36), and the other end of the secondary locking baffle (37) is provided with a guide groove (23). A positioning plate (30) is connected to the fixing plate (36), and the positioning plate (30) is provided with anti-slip patterns. The handle (1) is provided with a guide rail (31), which is located in the middle of the bottom surface of the limiting groove (39). The guide rail (31) and the guide groove (23) are slidably engaged.

5. The manual maintenance switch according to any one of claims 1 to 4, characterized in that, The plug assembly also includes a power pin (4), a plug sealing ring (5), a plug cover (6), and an interlocking pin component (7). The plug cover (6) has a cover buckle (43) on its outer side and a plug buckle (45) inside the plug housing (3). The cover buckle (43) and the plug buckle (45) are fastened together to install the plug cover (6) inside the plug housing (3). The plug sealing ring (5) and the power pin (4) are both located between the plug housing (3) and the plug cover (6). The top surface of the plug cover (6) has a protrusion (44). The power pin (4) has a through hole. The protrusion (44) passes through the through hole to fix the power pin (4). The plug part of the power pin (4) extends out of the plug cover (6). The plug cover (6) has a fence (41). The plug cover (6) inside the fence (41) has a fixing shell (46). The fixing shell (46) is engaged with the interlocking pin component (7).

6. The manual maintenance switch according to claim 5, characterized in that, The socket housing (11) is provided with a socket contact mother plate (14). The socket housing (11) and the socket contact mother plate (14) are plugged into each other. The end of the socket contact mother plate (14) is plugged into the power pin (4). The socket contact mother plate (14) is snapped into the pin structure (12).

7. The manual maintenance switch according to claim 6, characterized in that, The socket assembly also includes an interlocking socket component (8), an insert nut (9), and a square nut (13). The socket component (8) is located inside the socket housing (11). One end of the socket component (8) is connected to the controller, and the other end of the socket component (8) is inserted into the interlocking pin component (7). The housing of the socket component (8) is inserted into the fence (41). The bottom of the socket housing (11) is provided with a countersunk hole, and the insert nut (9) and the square nut (13) are both set in the countersunk hole.

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