Separated household plug

Abstract

The invention belongs to the technical field of plugs, and discloses a separated household plug, which comprises a direct insertion end assembly and a wiring end assembly, the wire connecting end assembly is arranged on the direct insertion end assembly; the direct insertion end assembly comprises a first end sleeve, a metal sheet is arranged on the lower portion in the first end sleeve, one end of the metal sheet extends to the outside of the first end sleeve, clamping blocks are movably connected to the two sides in the first end sleeve in a sleeved mode, one end of each clamping block is connected with a first spring, and the other end of each first spring is connected with the first end sleeve. A push ring abuts against the upper portion of the first end sleeve, one side of the push ring is connected with a second spring located in the first end sleeve, and the other end of the second spring is connected with an inner cavity of the first end sleeve. Therefore, the wire and the metal sheet are disconnected, the direct insertion end assembly and the connection end assembly of the plug are smoothly separated, the electric wire is not subjected to pulling force any more, meanwhile, a user does not fall down due to resistance of the electric wire any more, and damage to connection between the metal sheet and the socket is further avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of plugs, in particular to a detachable household plug. Background Art

[0002] Existing household plugs are basically all one-piece and most of the exterior is made of rubber material, which can provide good protection.

[0003] Existing plugs usually come with wires that are plugged into wall sockets. During actual use, users are prone to accidentally tripping over the wires. If the force of the trip is too great, the user's feet will be bound by the wires, which can easily cause the user to lose balance and fall. At the same time, the connection between the socket and the plug may bend or even break, causing damage to both the socket and the plug, and there is also a risk of electric shock to the user.

[0004] Therefore, a separate household plug is proposed to solve the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a detachable household plug.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detachable household plug, comprising a straight plug end assembly and a connection end assembly; The connection terminal assembly is arranged on the straight plug terminal assembly; The straight plug end assembly includes an end sleeve 1, a metal sheet is provided at the lower part of the end sleeve 1, one end of the metal sheet extends to the outside of the end sleeve 1, both sides of the end sleeve 1 are movably sleeved with clamping blocks, one end of the clamping block is connected to a spring 1, the other end of the spring 1 is connected to the end sleeve 1, a push ring is abutted on the top of the end sleeve 1, one side of the push ring is connected to a spring 2 located inside the end sleeve 1, and the other end of the spring 2 is connected to the inner cavity of the end sleeve 1; The connecting end assembly includes an end sleeve 2, which is abutted against the top of the push ring, and a hemispherical block is abutted against the top of the interior of the end sleeve 2, and an electric wire is sleeved inside the hemispherical block. One end of the electric wire passes through the end sleeve 2 and is connected to the rubber round block inside the end sleeve 1, and the other end of the clamping block is hemispherically clamped inside the rubber round block, and a ring is connected to the bottom of the hemispherical block, and a spring 3 is connected to the bottom of the ring, and the other end of the spring 3 is connected to the end sleeve 2. A conductive wire is arranged inside the electric wire, and one end of the conductive wire extends to the inside of the rubber round block and is sleeved on the metal sheet, and a spring 5 sleeved on the outside of the electric wire is connected between the end sleeve 2 and the rubber round block.

[0007] Preferably, both sides of the bottom of the push ring are connected with connecting rods, the inner side of the connecting rod is connected with a limit block slidably installed inside the end sleeve, and the upper side of the limit block is connected with a connecting plate.

[0008] Preferably, a movable plate sleeved in the end sleeve 1 and the limit block is connected above the clamping block, and a clamping rod capable of being clamped in the connecting plate is connected to the side of the movable plate facing the connecting plate.

[0009] Preferably, a fixing rod is connected below the clamping block, and a fixing plate is connected outside the fixing rod.

[0010] Preferably, it also includes a locking assembly, which includes a movable plate, and the movable plate is movably sleeved inside the end sleeve one and located below the spring one. Limit rods are movably sleeved on both sides of the movable plate, and the limit rods are installed inside the end sleeve one. The bottom of the movable plate is connected to a pressure block located inside the end sleeve one, and the bottom of the pressure block extends to below the end sleeve one.

[0011] Preferably, a spring four is provided on the outer sleeve of the limiting rod, one end of the spring four is connected to the movable plate, and the other end of the spring four is connected to the end sleeve one.

[0012] Preferably, the other side of the fixed plate extends to the interior of the movable plate, a round rod is connected below the interior of the fixed plate, and the bottom end of the round rod is clamped in the interior of the fixed plate.

[0013] Preferably, it also includes a shielding component, which includes three connecting frames, which are respectively installed inside the end sleeve and can correspond to the metal sheet. A shielding plate is movably installed inside the connecting frame, and one side of the shielding plate abuts against the rubber round block.

[0014] Preferably, the other side of the baffle plate is connected to an arc block, the external movable sleeve of the arc block is provided with an arc sleeve, the arc sleeve is connected to the connecting frame, the other side of the arc block is connected to an arc spring located inside the connecting frame, and the other end of the arc spring is connected to the connecting frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a card block and a rubber ball. When a user trips over an electric wire, the electric wire is subjected to an oblique pulling force, and then the hemispherical block is driven to move in the pulling direction inside the end sleeve 2. At the same time, due to the pulling force of the electric wire, the rubber ball is driven to move toward the end sleeve 2. At the same time, the movement of the rubber ball compresses the spring 5 and squeezes the card block to move toward the inside of the end sleeve 1. At this time, the spring 1 is compressed. At the same time, when the pulling force of the rubber ball is greater than the elastic force of the spring 1 and the spring 5, the card block will be squeezed out of the inside by the rubber ball, so that the rubber ball and the card block are separated, and the fixing effect of the straight plug end assembly and the connecting end assembly is released. When the block is completely retracted to the inside of both sides of the end sleeve one, it will drive the movable plate and the card rod to move at the same time and disengage from the inside of the connecting plate, thereby releasing the fixing effect of the connecting plate, the limit block, the connecting rod and the push ring. At this time, the spring two, which is in a compressed state, will push the push ring to pop out due to the recovery effect of the elastic force. Due to the popping out of the push ring, the end sleeve two and the rubber round block will be pushed away from the end sleeve one, thereby disconnecting the wire and the metal sheet, and smoothly separating the straight plug-in end component and the connecting end component of the plug, so that the wire is no longer subjected to pulling force, and the user will no longer fall due to the resistance of the wire, thereby avoiding damage to the connection between the metal sheet and the socket.

[0016] By providing a pressure block and a round rod, the user inserts the plug into the socket and turns on the power. At this time, the pressure block is squeezed by the socket, pushing the movable plate to move upward along the limit rod, and compressing the limit rod. At the same time, the round rod is disengaged from the inside of the fixed plate, thereby releasing the fixation of the fixed plate, the fixed rod and the card block, making the card block movable so that the straight plug-in end assembly and the connecting end assembly can be disengaged. This design can keep the straight plug-in end assembly and the connecting end assembly in a stable fixed state when not plugged into the socket, thereby avoiding accidental loosening of the card block and causing accidental separation of the straight plug-in end assembly and the connecting end assembly.

[0017] By providing a shielding plate and an arc spring, when the rubber ball is detached from the interior of the end sleeve, the rubber ball will release the contact with the shielding plate, so that the arc spring in the compressed state will push the arc block and the shielding plate to rotate under the recovery effect of the elastic force. Finally, after the shielding plate rotates ninety degrees, the metal sheet can be shielded, thereby preventing the user from accidentally touching the metal sheet and getting an electric shock, thereby ensuring the user's safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Figure 4 It is a schematic cross-sectional structural diagram of the movable plate of the present invention; Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at B in the middle; Figure 6 It is a schematic diagram of the structure of the connection between the wire and the metal sheet of the present invention; Figure 7 It is a schematic diagram of the structure of the shielding assembly of the present invention; Figure 8 It is a cross-sectional structural schematic diagram of the connecting frame of the present invention; Fig. 9 for Figure 8 Schematic diagram of the local enlarged structure at point C in the middle.

[0019] In the figure: 1. straight plug-in terminal assembly; 11. end sleeve one; 12. metal sheet; 13. clamping block; 14. spring one; 15. connecting rod; 16. limit block; 17. connecting plate; 18. movable plate; 19. clamping rod; 110. spring two; 111. push ring; 112. fixing rod; 113. fixing plate; 2. connection terminal assembly; 21. end sleeve two; 22. hemispherical block; 23. electric wire; 24. butt ring; 25. spring three; 26. rubber round block; 27. wire; 28. spring five; 3. locking assembly; 31. limit rod; 32. movable plate; 33. spring four; 34. round rod; 35. pressure block; 4. shielding assembly; 41. connecting frame; 42. shielding plate; 43. arc sleeve; 44. arc block; 45. arc spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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] like Figures 1 to 9 As shown, the present invention provides a detachable household plug, comprising a straight plug end assembly 1 and a connection end assembly 2; The connection terminal component 2 is arranged on the plug-in terminal component 1; The straight plug terminal assembly 1 includes an end sleeve 11, a metal sheet 12 is provided at the lower part of the end sleeve 11, one end of the metal sheet 12 extends to the outside of the end sleeve 11, and both sides of the end sleeve 11 are movably sleeved with a clamping block 13, one end of the clamping block 13 is connected to a spring 14, and the other end of the spring 14 is connected to the end sleeve 11, and a push ring 111 is abutted on the top of the end sleeve 11, and one side of the push ring 111 is connected to a spring 2 110 located inside the end sleeve 11, and the other end of the spring 2 110 is connected to the inner cavity of the end sleeve 11; The connecting terminal assembly 2 includes an end sleeve 21, which is abutted against the top of the push ring 111, and a hemispherical block 22 is abutted against the top of the end sleeve 21. A wire 23 is sleeved inside the hemispherical block 22. One end of the wire 23 passes through the end sleeve 21 and is connected to a rubber round block 26 inside the end sleeve 11. The other end of the clamping block 13 is hemispherically clamped inside the rubber round block 26. A ring 24 is connected to the bottom of the hemispherical block 22. A spring three 25 is connected to the bottom of the ring 24. The other end of the spring three 25 is connected to the end sleeve 21. A conductor 27 is provided inside the wire 23. One end of the conductor 27 extends to the inside of the rubber round block 26 and is sleeved on the metal sheet 12. A spring five 28 sleeved on the outside of the wire 23 is connected between the end sleeve 21 and the rubber round block 26.

[0022] According to the above scheme, when a user trips over the wire 23, the wire 23 is subjected to an oblique pulling force, which then drives the hemispherical block 22 to move in the pulling direction inside the end sleeve 21. At the same time, due to the pulling force of the wire 23, the rubber round block 26 is driven to move toward the end sleeve 21. At the same time, the movement of the rubber round block 26 compresses the spring 5 28 and squeezes the card block 13 to move toward the inside of the end sleeve 11. At this time, the spring 14 is compressed. At the same time, when the pulling force of the rubber round block 26 is greater than the elastic force of the spring 14 and the spring 5 28, The block 13 will be squeezed out of the inside by the rubber round block 26, so that the rubber round block 26 and the block 13 will be separated, and the fixing effect of the straight plug end component 1 and the connecting end component 2 will be released. At this time, the spring 2 110 in the compressed state will push the push ring 111 to pop out due to the recovery effect of the elastic force. Due to the popping out of the push ring 111, the end sleeve 21 and the rubber round block 26 will be pushed away from the end sleeve 1 11, thereby disconnecting the wire 27 and the metal sheet 12, and smoothly separating the straight plug end component 1 and the connecting end component 2 of the plug.

[0023] like Figure 2 As shown, both sides of the bottom of the push ring 111 are connected with connecting rods 15, the inner side of the connecting rod 15 is connected with a limit block 16 slidably installed inside the end sleeve 11, and the upper side of the limit block 16 is connected with a connecting plate 17.

[0024] With the above solution, when the push ring 111 moves, the connecting rod 15 , the limiting block 16 and the connecting plate 17 move together, and under the action of the limiting block 16 , the movement of the push ring 111 is limited.

[0025] like Figure 2 As shown, a movable plate 18 sleeved in the end sleeve 11 and the limit block 16 is connected to the upper side of the clamping block 13 , and a clamping rod 19 that can be clamped in the connecting plate 17 is connected to the side of the movable plate 18 facing the connecting plate 17 .

[0026] The above scheme is adopted: when the clamping block 13 is completely retracted to the inside of both sides of the end sleeve 11, it will drive the movable plate 18 and the clamping rod 19 to move simultaneously and disengage from the inside of the connecting plate 17, thereby releasing the fixing effect of the connecting plate 17, the limit block 16, the connecting rod 15 and the push ring 111, so that the elastic force of the compressed spring 2 110 is released.

[0027] like Figure 2 As shown, a fixing rod 112 is connected to the lower part of the block 13 , and a fixing plate 113 is connected to the outer side of the fixing rod 112 .

[0028] With the above solution, when the block 13 moves outward, the fixed rod 112 , the fixed plate 113 , the movable plate 18 and the block 19 will move simultaneously, and the movable plate 18 and the fixed rod 112 can limit the movement of the block 13 .

[0029] like Figures 2 to 5 As shown, it also includes a locking component 3, which includes a movable plate 32. The movable plate 32 is movably sleeved inside the end sleeve 11 and is located below the spring 14. Limit rods 31 are movably sleeved on both sides of the movable plate 32. The limit rods 31 are installed inside the end sleeve 11. The bottom of the movable plate 32 is connected to a pressure block 35 located inside the end sleeve 11, and the bottom of the pressure block 35 extends to below the end sleeve 11.

[0030] With the above solution, the user inserts the plug into the socket to turn on the power. At this time, the pressure block 35 is squeezed by the socket, pushing the movable plate 32 to move upward along the limiting rod 31, so that the limiting rod 31 has a good limiting effect on the movable plate 32.

[0031] like Figures 2 to 5 As shown, a spring four 33 is sleeved on the outer side of the limiting rod 31, one end of the spring four 33 is connected to the moving plate 32, and the other end of the spring four 33 is connected to the end sleeve one 11.

[0032] With the above solution, the upward movement of the movable plate 32 can compress the limiting rod 31 , and the movable plate 32 is pushed downward by the elastic force recovery of the limiting rod 31 , so that the movable plate 32 can be subsequently reset.

[0033] like Figures 2 to 5 As shown, the other side of the fixed plate 113 extends to the inside of the movable plate 32 , and a round rod 34 is connected to the lower part of the inside of the fixed plate 113 , and the bottom end of the round rod 34 is clamped in the inside of the fixed plate 113 .

[0034] By adopting the above scheme, due to the upward movement of the movable plate 32, the round rod 34 can be disengaged from the inside of the fixed plate 113, thereby releasing the fixation of the fixed plate 113, the fixed rod 112 and the block 13, and making the block 13 movable so that the straight plug-in terminal assembly 1 and the connecting terminal assembly 2 can be disengaged.

[0035] like Figures 7 to 9 As shown, it also includes a shielding component 4, which includes three connecting frames 41. The three connecting frames 41 are respectively installed inside the end sleeve 11 and can correspond to the metal sheet 12. A shielding plate 42 is movably installed inside the connecting frame 41, and one side of the shielding plate 42 is in contact with the rubber round block 26.

[0036] With the above solution, when the shielding plate 42 rotates ninety degrees, the metal sheet 12 can be shielded, thereby preventing the user from accidentally touching the metal sheet 12 and getting an electric shock, thereby ensuring the safety of the user.

[0037] like Figures 7 to 9 As shown, the other side of the baffle plate 42 is connected to an arc block 44, the outer movable sleeve of the arc block 44 is provided with an arc sleeve 43, the arc sleeve 43 is connected to the connecting frame 41, and the other side of the arc block 44 is connected to an arc spring 45 located inside the connecting frame 41, and the other end of the arc spring 45 is connected to the connecting frame 41.

[0038] The above scheme is adopted: when the rubber round block 26 is detached from the inside of the end sleeve 11, the rubber round block 26 will release the contact with the baffle plate 42, so that the arc spring 45 in the compressed state, under the restoring action of the elastic force, pushes the arc block 44 and the baffle plate 42 to rotate, and finally rotates the baffle plate 42 ninety degrees.

[0039] The working principle and use process of the present invention: When in use, the user inserts the plug into the socket to turn on the power. At this time, the pressure block 35 is squeezed by the socket, pushing the movable plate 32 to move upward along the limit rod 31, and compressing the limit rod 31. At the same time, the round rod 34 is disengaged from the inside of the fixed plate 113, releasing the fixation of the fixed plate 113, the fixed rod 112 and the block 13, making the block 13 movable so that the straight plug-in end assembly 1 and the connecting end assembly 2 can be disengaged.

[0040] When the user trips over the wire 23, the wire 23 is subjected to an oblique pulling force, which then drives the hemispherical block 22 to move in the pulling direction inside the end sleeve 21. At the same time, due to the pulling force of the wire 23, the rubber round block 26 is driven to move toward the end sleeve 21. At the same time, the movement of the rubber round block 26 compresses the spring five 28 and squeezes the card block 13 to move toward the inside of the end sleeve 11. At this time, the spring 14 is compressed. At the same time, when the pulling force of the rubber round block 26 is greater than the elastic force of the spring 14 and the spring five 28, the card block 13 will be squeezed out of the inside by the rubber round block 26, so that the rubber round block 26 and the card block 13 are separated, and the straight plug end assembly is released. 1 and the fixing effect of the connecting terminal assembly 2. When the clamping block 13 is completely retracted to the inside of both sides of the end sleeve 11, it will drive the movable plate 18 and the clamping rod 19 to move simultaneously and disengage from the inside of the connecting plate 17, thereby releasing the fixing effect of the connecting plate 17, the limit block 16, the connecting rod 15 and the push ring 111. At this time, the spring 2 110 in the compressed state will push the push ring 111 to pop out due to the recovery effect of the elastic force. Due to the popping out of the push ring 111, the end sleeve 21 and the rubber round block 26 will be pushed away from the end sleeve 11, thereby disconnecting the wire 27 and the metal sheet 12, and smoothly separating the straight plug end assembly 1 and the connecting terminal assembly 2 of the plug.

[0041] When the rubber round block 26 is detached from the end sleeve 11, the rubber round block 26 will release the contact with the shielding plate 42, so that the arc spring 45 in the compressed state will push the arc block 44 and the shielding plate 42 to rotate under the recovery effect of the elastic force. Finally, after the shielding plate 42 rotates ninety degrees, the metal sheet 12 can be shielded, thereby preventing the user from accidentally touching the metal sheet 12 and getting an electric shock, thereby ensuring the user's safety.

[0042] During resetting, the user inserts the rubber round block 26 into the interior of the end sleeve 11. At this time, the rubber round block 26 squeezes the baffle plate 42 to flip over, and at the same time, the end sleeve 21 pushes the push ring 111, the connecting rod 15, the limit block 16 and the connecting plate 17 to move downward. At this time, the spring 2 110 is squeezed. When the push ring 111 is reset, the rubber round block 26 and the connecting plate 17 are also reset at the same time, and the wire 27 and the metal sheet 12 are connected. Due to the elastic recovery effect of the spring 14, the block 13, the movable plate 18 and the clamping rod 19 are pushed to move inward, so that the clamping rod 19 is clamped into the interior of the connecting plate 17 and reset, and the block 13 is clamped into the interior of the rubber round block 26 and reset, and the straight plug end assembly 1 and the connecting end assembly 2 are fixed again.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable household plug, characterized in that: It comprises a plug-in terminal component (1) and a connection terminal component (2); The connection terminal component (2) is arranged on the plug-in terminal component (1); The straight plug end assembly (1) comprises an end sleeve (11), a metal sheet (12) is provided at the lower part of the end sleeve (11), one end of the metal sheet (12) extends to the outside of the end sleeve (11), both sides of the end sleeve (11) are movably sleeved with clamping blocks (13), one end of the clamping block (13) is connected to a spring (14), the other end of the spring (14) is connected to the end sleeve (11), a push ring (111) is abutted on the top of the end sleeve (11), one side of the push ring (111) is connected to a spring (110) located inside the end sleeve (11), and the other end of the spring (110) is connected to the inner cavity of the end sleeve (11); The connection end assembly (2) comprises an end sleeve (21), the end sleeve (21) being abutted against the top of the push ring (111), a hemispherical block (22) being abutted against the top of the interior of the end sleeve (21), an electric wire (23) being sleeved inside the hemispherical block (22), one end of the electric wire (23) passing through the end sleeve (21) and connected to a rubber round block (26) inside the end sleeve (11), the other end of the clamping block (13) being clamped in a hemispherical manner inside the rubber round block (26), The bottom of the hemispherical block (22) is connected to a collar (24), the bottom of the collar (24) is connected to a spring three (25), the other end of the spring three (25) is connected to the end sleeve two (21), a conductor (27) is provided inside the electric wire (23), one end of the conductor (27) extends to the inside of the rubber round block (26) and is sleeved on the metal sheet (12), and a spring five (28) sleeved on the outside of the electric wire (23) is connected between the end sleeve two (21) and the rubber round block (26).

2. A detachable household plug according to claim 1, characterized in that: Both sides of the bottom of the push ring (111) are connected to connecting rods (15), the inner side of the connecting rods (15) is connected to a limit block (16) slidably mounted inside the end sleeve (11), and the upper side of the limit block (16) is connected to a connecting plate (17).

3. A detachable household plug according to claim 2, characterized in that: A movable plate (18) sleeved in the end sleeve (11) and the limit block (16) is connected above the clamping block (13); a clamping rod (19) capable of being clamped in the connecting plate (17) is connected on one side of the movable plate (18) facing the connecting plate (17).

4. A detachable household plug according to claim 1, characterized in that: A fixing rod (112) is connected below the clamping block (13), and a fixing plate (113) is connected outside the fixing rod (112).

5. A detachable household plug according to claim 4, characterized in that: The invention also comprises a locking assembly (3), wherein the locking assembly (3) comprises a movable plate (32), wherein the movable plate (32) is movably sleeved inside the end sleeve (11) and is located below the spring (14), and both sides inside the movable plate (32) are movably sleeved with limit rods (31), and the limit rods (31) are installed inside the end sleeve (11), and the bottom of the movable plate (32) is connected to a pressure block (35) located inside the end sleeve (11), and the bottom of the pressure block (35) extends to below the end sleeve (11).

6. A detachable household plug according to claim 5, characterized in that: A spring four (33) is sleeved on the outside of the limiting rod (31), one end of the spring four (33) is connected to the moving plate (32), and the other end of the spring four (33) is connected to the end sleeve one (11).

7. A detachable household plug according to claim 6, characterized in that: The other side of the fixed plate (113) extends to the interior of the movable plate (32), and a round rod (34) is connected to the lower part of the interior of the fixed plate (113), and the bottom end of the round rod (34) is clamped in the interior of the fixed plate (113).

8. A detachable household plug according to claim 1, characterized in that: It also comprises a shielding assembly (4), the shielding assembly (4) comprising three connecting frames (41), the three connecting frames (41) being respectively mounted inside the end sleeve (11) and being able to correspond to the metal sheet (12), a shielding plate (42) being movably mounted inside the connecting frame (41), one side of the shielding plate (42) being in contact with the rubber round block (26).

9. A detachable household plug according to claim 8, characterized in that: The other side of the shielding plate (42) is connected to an arc block (44), an outer movable sleeve of the arc block (44) is provided with an arc sleeve (43), the arc sleeve (43) is connected to the connecting frame (41), the other side of the arc block (44) is connected to an arc spring (45) located inside the connecting frame (41), and the other end of the arc spring (45) is connected to the connecting frame (41).

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