CN112054342B

CN112054342B - Outdoor waterproof electric shock protection wiring board

Info

Publication number: CN112054342B
Application number: CN202010964055.XA
Authority: CN
Inventors: 吴万艳
Original assignee: Taizhou Weiye Molding Co ltd
Current assignee: Taizhou Weiye Molding Co.,Ltd.
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-09-03
Anticipated expiration: 2040-09-15
Also published as: CN112054342A

Abstract

An outdoor waterproof electric shock-proof patch board comprises a power connection and disconnection mechanism, an insulating square cover mechanism, a special plug mechanism, a lifting power connection mechanism and a power connection and clamping mechanism; insert socket with electrically conductive copper sheet B and push away the socket baffle, then get into the electrically conductive copper sheet of Y type, the inclined plane that withstands U type fixture block promotes the buckle of U type fixture block outwards, and then make insulating bottom plate and U type fixture block break away from, spring A promotes insulating bottom plate upwards, the electrically conductive copper sheet of Y type and the electrically conductive copper sheet contact circular telegram of U type, and then make electro-magnet B circular fixture block promote in the round hole B thereby will electrically conductive copper sheet B card die, prevent that the plug from dropping the outage when insulating drain pan inside intaking, the breakpoint of one side connecting wire is put through by the water, and then make electro-magnet A circular telegram, produce the suction through electro-magnet A and move down the iron sheet, connect copper sheet and insulation board, make and connect copper sheet and electrically conductive copper sheet A to break away from, and then make whole socket outage avoid the harm that the continuous electricity produced.

Description

Outdoor waterproof electric shock protection wiring board

Technical Field

The invention relates to the technical field of patch board equipment, in particular to an outdoor waterproof electric shock-proof patch board.

Background

The patch board is the essential electrical apparatus connecting piece in people's production, the life, traditional patch board all is with inside metal contact and power cord lug connection, the plug of electrical apparatus is direct and the metal contact switch on power when using, the metal contact in the socket directly exposes in the jack, the leakproofness is very poor, it also can even connect the electricity to advance a little water, extremely dangerous, the probability of electrocute is very big, consequently, need a equipment, can not contact the copper sheet from inserting to connect the electricity, the leakproofness is also very good, it also can auto-power-off to connect the electricity, great reduction the probability of electrocute, user of service's safety has been ensured.

Disclosure of Invention

Aiming at the problems, the invention provides an outdoor waterproof electric shock prevention patch board, when the patch board is required to be used, a conductive copper sheet B is inserted into a jack to jack a jack baffle, then the jack baffle enters a Y-shaped conductive copper sheet to jack an inclined plane of a U-shaped fixture block to push a buckle of the U-shaped fixture block outwards, so that an insulating base plate is separated from the U-shaped fixture block, a spring A pushes the insulating base plate upwards, the Y-shaped conductive copper sheet is in contact with the U-shaped conductive copper sheet to be electrified, and an electromagnet B is electrified to push a round fixture block into a round hole B to clamp the conductive copper sheet B, so that the plug is prevented from falling off and being powered off.

The technical scheme adopted by the invention is as follows: an outdoor waterproof electric shock-proof patch board comprises a power connection and disconnection mechanism, an insulating square cover mechanism, a special plug mechanism, a lifting power connection mechanism and a power connection and clamping mechanism; the insulating square cover mechanism is arranged above the power connection and disconnection mechanism, so that the function of sealing the socket is realized; the lifting power connection mechanism is arranged in the power connection and disconnection mechanism and is positioned below the power connection and disconnection mechanism, and the power connection and disconnection function is realized by the up-and-down movement of the lifting power connection mechanism; the power-on clamping mechanism is arranged in the insulating square cover mechanism and positioned above the lifting power-on mechanism, and the special plug mechanism is clamped on the insulating square cover mechanism by powering on the power-on clamping mechanism; the special plug mechanism is movably inserted into the jack on the insulating square cover mechanism.

Further, the power connection and disconnection mechanism comprises an insulating bottom shell, a plug with a wire, a seal box, a conducting wire, a water guide hole, a groove lug, an insulating baffle A, a clamping block, an electromagnet A, an insulating baffle B, an iron sheet, a connecting copper sheet, a conducting copper sheet A, an insulating plate and a connecting wire; the insulating bottom shell is an insulating shell; the rear end of the plug with the wire penetrates through a hole in the insulating square cover to be connected with the sealing box; the sealing box is fixedly arranged inside the insulating square cover; the electric lead is arranged in the insulating bottom shell, the front end of the electric lead is communicated with the conductive copper sheet A in the sealing box, and the electric lead is communicated with the U-shaped conductive copper sheet; the water guide hole is formed in the bottom of the insulating bottom shell; the groove lug is fixedly arranged at the bottom of the insulating bottom shell; the insulating baffle A is arranged at the bottom of the insulating bottom shell; the clamping block is arranged at the bottom of the insulating bottom shell; the electromagnet A is fixedly arranged in the sealing box; the four insulating baffles B are fixedly arranged at the upper end in the sealing box; the iron sheet is fixedly arranged on the spring on the electromagnet A; the insulating plate is fixedly arranged on the iron sheet; the two connecting copper sheets are fixedly arranged on the insulating plate; the four conductive copper sheets A are respectively and fixedly arranged on the four insulating baffle plates B; the connecting wire has two, and connecting wire one end is connected with U type conductive copper sheet, and the other end is connected with electro-magnet A, and the intermediate position of one of them connecting wire is equipped with the breakpoint.

Further, the insulating square cover mechanism comprises: the insulation square cover, the round hole A and the socket are arranged; the four jacks are arranged on the upper end face of the insulating square cover, and magnets are arranged inside the jacks; two round holes A set up at insulating side cover up end.

Further, the tailored plug mechanism comprises: the plug, the conductive copper sheet B and the round hole B; the two conductive copper sheets B are fixedly arranged at the bottom of the plug, and are provided with round holes B which are movably matched with the round clamping blocks.

Further, the power connection mechanism that goes up and down includes: the insulation base plate, the insulation round rod, the spring A, U type clamping block, the spring B, the insulation shell and the Y-shaped conductive copper sheet; the insulating bottom plate is slidably arranged on the sliding groove in the groove bump; the insulating round rod is fixedly arranged on the insulating bottom plate; the upper ends of the four springs A are fixedly arranged at the bottom of the insulating bottom plate, and the lower ends of the four springs A are fixedly arranged on the lower panel of the insulating bottom shell; the two U-shaped clamping blocks are slidably arranged in the sliding grooves on the clamping blocks, and the upper ends of the U-shaped clamping blocks are movably clamped with the insulating bottom plate; the spring B is fixedly arranged at one end of the U-shaped clamping block, and the outer end of the spring B is connected with the insulating baffle A; the insulating shell is fixedly arranged on the insulating bottom plate; the lower end of the Y-shaped conductive copper sheet is fixedly arranged on the insulating bottom plate.

Further, the power-on locking mechanism includes: the device comprises a U-shaped conductive copper sheet, screws, a socket baffle, a circular clamping block, a spring C, an electromagnet B and U-shaped insulating plastic; the U-shaped conductive copper sheet is fixedly arranged inside the insulating square cover; the screw is rotatably arranged on the U-shaped conductive copper sheet; the small cylinders at the two ends of the socket baffle are rotatably arranged in the circular grooves in the socket; the upper end surface of the rear panel of the circular fixture block is slidably arranged in a chute inside the socket; one end of a spring C is connected with the rear panel of the circular fixture block, and the other end of the spring C is connected with the electromagnet B; the electromagnet B is fixedly arranged in a square groove in the insulating square cover; u-shaped conductive copper sheets are wrapped by U-shaped insulating plastics.

Due to the adoption of the technical scheme, the invention has the following advantages:

1. when needs use, insert socket with electrically conductive copper sheet B and back up the socket baffle, then get into the electrically conductive copper sheet of Y type, the inclined plane that withstands U type fixture block outwards promotes the buckle of U type fixture block, and then makes insulating bottom plate and U type fixture block break away from, and spring A upwards promotes insulating bottom plate, and the electrically conductive copper sheet of Y type and the electrically conductive copper sheet contact circular telegram of U type, thereby it dies electrically conductive copper sheet B card to make electro-magnet B circular fixture block promote in the round hole B to the circular fixture block, prevents that the plug from droing the outage.

2. When the use is finished, the insulating round rod needs to be pressed downwards to enable the insulating bottom plate to move downwards, and then the Y-shaped conductive copper sheet is separated from the U-shaped conductive copper sheet to be powered off, the round fixture block is pulled back to be separated from the round hole B through the spring C, then the spring B pushes the U-shaped fixture block to slide inwards to enable the conductive copper sheet B to jack upwards, the insulating bottom plate is clamped by the U-shaped fixture block, then the special plug mechanism is pulled out, the spring inside the socket ejects the socket baffle to block the socket, the magnet on the socket baffle and the magnet on the socket attract each other to enable the socket to be closed, foreign matters are prevented from falling into the socket, and the inside of the socket is kept clean.

3. When water enters the insulating bottom shell, the breakpoint of the connecting wire on one side is connected with the water, the electromagnet A is powered on, the iron sheet, the connecting copper sheet and the insulating plate are moved downwards by the attraction generated by the electromagnet A, the connecting copper sheet is separated from the conductive copper sheet A, and the damage caused by power connection is avoided by the power failure of the whole socket.

4. This equipment can be put outdoor use because the leakproofness is good, and the electricity copper sheet that connects of the inside also separates each other, even entered water also has the water guide hole and discharges water, if intake more, also has automatic outage mechanism, prevents that the user from electrocuting.

Drawings

Fig. 1-2 are schematic diagrams of the overall structure of the present invention.

Fig. 3-4 are partial structural schematic diagrams of the power connection and disconnection mechanism of the invention.

FIG. 5 is a schematic view of a part of the insulating square cover mechanism of the present invention.

Fig. 6 is a partial structural schematic view of the special plug mechanism of the present invention.

Fig. 7-8 are schematic structural views of a part of the lifting power connection mechanism of the present invention.

Fig. 9-10 are partial structural schematic views of the power-on locking mechanism of the present invention.

Reference numerals: 1-a power connection and disconnection mechanism; 2-insulating square cover mechanism; 3, specially manufacturing a plug mechanism; 4, a lifting power connection mechanism; 5-electrifying a clamping mechanism; 101-an insulating bottom case; 102-strip line plug; 103-sealing box; 104-a conductive line; 105-a water guiding hole; 106-groove bumps; 107-insulating barrier a; 108-a cartridge; 109-electromagnet a; 110-insulating barrier B; 111-iron sheet; 112-connecting copper sheets; 113-conductive copper sheet a; 114-an insulating plate; 115-connecting lines; 201-insulating square cover; 202-round hole A; 203-a socket; 301-a plug; 302-conductive copper sheet B; 303-round hole B; 401-insulating base plate; 402-insulating round bar; 403-spring a; 404-U-shaped fixture blocks; 405-spring B; 406-an insulating shell; 407-Y type conductive copper sheet; 501-U-shaped conductive copper sheets; 502-screws; 503-a socket baffle; 504-circular fixture block; 505-spring C; 506-electromagnet B; 507-U type insulating plastic.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Embodiment is as shown in fig. 1-10, an outdoor waterproof and electric shock-proof patch board comprises a power connection and disconnection mechanism 1, an insulating square cover mechanism 2, a special plug mechanism 3, a lifting power connection mechanism 4 and a power-on clamping mechanism 5; the insulating square cover mechanism 2 is arranged above the power-on and power-off mechanism 1, so that the function of sealing the socket is realized; the lifting power connection mechanism 4 is arranged in the power connection and disconnection mechanism 1 and is positioned below the power connection and disconnection mechanism 5, and the power connection and disconnection functions are realized by the up-and-down movement of the lifting power connection mechanism 4; the power-on clamping mechanism 5 is arranged in the insulating square cover mechanism 2 and is positioned above the lifting power-on mechanism 4, and the special plug mechanism 3 is clamped on the insulating square cover mechanism 2 by powering on the power-on clamping mechanism 5; the special plug mechanism 3 is movably inserted into the jack on the insulating square cover mechanism 2.

In an optional implementation manner of the embodiment of the invention, except for the same parts as those in the previous embodiment, the power connection and disconnection mechanism 1 comprises an insulating bottom shell 101, a wired plug 102, a sealing box 103, a conductive wire 104, a water guide hole 105, a groove bump 106, an insulating baffle A107, a fixture block 108, an electromagnet A109, an insulating baffle B110, an iron sheet 111, a connecting copper sheet 112, a conductive copper sheet A113, an insulating plate 114 and a connecting wire 115; the insulating bottom case 101 is an insulating shell; the rear end of the plug with wire 102 passes through the hole on the insulating square cover 201 to be connected with the sealing box 103; the sealing box 103 is fixedly arranged inside the insulating square cover 201; the conductive wire 104 is arranged inside the insulating bottom shell 101, the front end of the conductive wire 104 is communicated with the conductive copper sheet A113 in the sealing box 103, and the conductive wire 104 is communicated with the U-shaped conductive copper sheet 501; the water guide hole 105 is arranged at the bottom of the insulating bottom case 101; the groove bump 106 is fixedly arranged at the bottom of the insulating bottom shell 101; the insulation baffle A107 is arranged at the bottom of the insulation bottom shell 101; the fixture block 108 is arranged at the bottom of the insulating bottom shell 101; the electromagnet A109 is fixedly arranged in the sealing box 103; four insulation baffles B110 are fixedly arranged at the upper end inside the seal box 103; the iron sheet 111 is fixedly arranged on the spring of the electromagnet A109; the insulating plate 114 is fixedly arranged on the iron sheet 111; two connecting copper sheets 112 are fixedly arranged on the insulating plate 114; the four conductive copper sheets A113 are respectively and fixedly arranged on the four insulating baffle plates B110; two connecting wires 115 are provided, one end of each connecting wire 115 is connected with the U-shaped conductive copper sheet 501, the other end of each connecting wire 115 is connected with the electromagnet A109, and a breakpoint is arranged in the middle of one connecting wire 115.

In an alternative embodiment of the present invention, the insulating square cover mechanism 2 includes, in addition to the same components as in the previous embodiment: an insulating square cover 201, a round hole A202 and a socket 203; the four jacks 203 are arranged on the upper end face of the insulating square cover 201, and magnets are arranged inside the jacks 203; two round holes a202 are provided in the upper end face of the insulating square cover 201.

In an alternative embodiment of the present embodiment, the specially-made plug mechanism 3 includes, in addition to the same components as the previous embodiment: the plug 301, the conductive copper sheet B302 and the round hole B303; the two conductive copper sheets B302 are fixedly arranged at the bottom of the plug 301, round holes B303 are formed in the conductive copper sheets B302, and the round holes B303 are movably matched with the round fixture blocks 504.

In an alternative implementation manner of the embodiment of the present invention, the lifting power connection mechanism 4 includes, in addition to the same components as those in the previous embodiment: the insulation base plate 401, the insulation round rod 402, the spring A403, the U-shaped fixture block 404, the spring B405, the insulation shell 406 and the Y-shaped conductive copper sheet 407; the insulating bottom plate 401 is slidably mounted on a sliding groove in the groove bump 106; the insulating round rod 402 is fixedly arranged on the insulating bottom plate 401; the upper ends of the four springs A403 are fixedly arranged at the bottom of the insulating bottom plate 401, and the lower ends of the four springs A403 are fixedly arranged on the lower panel of the insulating bottom shell 101; the two U-shaped clamping blocks 404 are slidably mounted in the sliding grooves of the clamping blocks 108, and the upper ends of the U-shaped clamping blocks 404 are movably clamped with the insulating bottom plate 401; the spring B405 is fixedly arranged at one end of the U-shaped fixture block 404, and the outer end of the spring B405 is connected with the insulating baffle A107; the insulating shell 406 is fixedly arranged on the insulating bottom plate 401; the lower end of the Y-shaped conductive copper sheet 407 is fixedly arranged on the insulating bottom plate 401.

In an alternative embodiment of the present invention, the electric locking mechanism 5 includes, in addition to the same components as in the previous embodiment: the device comprises a U-shaped conductive copper sheet 501, a screw 502, a socket baffle 503, a circular fixture block 504, a spring C505, an electromagnet B506 and U-shaped insulating plastic 507; the U-shaped conductive copper sheet 501 is fixedly arranged inside the insulating square cover 201; the screw 502 is rotatably arranged on the U-shaped conductive copper sheet 501; the small cylinders at the two ends of the socket baffle 503 are rotatably arranged in the circular grooves in the socket 203; the upper end surface of the rear panel of the circular fixture block 504 is slidably arranged in a chute in the socket 203; one end of a spring C505 is connected with the rear panel of the circular fixture block 504, and the other end of the spring C505 is connected with an electromagnet B506; the electromagnet B506 is fixedly arranged in a square groove in the insulating square cover 201; u-shaped conductive copper sheet 501 is wrapped by U-shaped insulating plastic 507.

The working principle is as follows: when the plug is required to be used, the conductive copper sheet B302 is inserted into the socket 203 to prop open the socket baffle 503, then the conductive copper sheet B enters the Y-shaped conductive copper sheet 407, the inclined surface of the U-shaped fixture block 404 is propped against to push the buckle of the U-shaped fixture block 404 outwards, the insulating base plate 401 is separated from the U-shaped fixture block 404, the spring A403 pushes the insulating base plate 401 upwards, the Y-shaped conductive copper sheet 407 is in contact with the U-shaped conductive copper sheet 501 to be electrified, the electromagnet B506 is electrified to push the circular fixture block 504 into the circular hole B303, and therefore the conductive copper sheet B302 is clamped, and the plug 301 is prevented from falling off and being powered off.

When the use is finished, the insulating round rod 402 needs to be pressed downwards to enable the insulating bottom plate 401 to move downwards, then the Y-shaped conductive copper sheet 407 is separated from the U-shaped conductive copper sheet 501, the power is cut off, the round fixture block 504 is pulled back to be separated from the round hole B303 through the spring C505, then the spring B405 pushes the U-shaped fixture block 404 to slide inwards to enable the conductive copper sheet B302 to jack upwards, the insulating bottom plate 401 is clamped by the U-shaped fixture block 404, then the specially-made plug mechanism 3 is pulled out, the spring in the socket 203 ejects the socket baffle 503 to block the socket 203, the magnet on the socket baffle 503 is attracted with the magnet on the socket 203 to close the socket 203, foreign matters are prevented from falling in, and the interior of the socket is kept clean.

When water enters the insulating bottom case 101, the break point of the connecting wire 115 on one side is connected by water, so that the electromagnet a109 is electrified, the electromagnet a109 generates suction to move the iron sheet 111, the connecting copper sheet 112 and the insulating plate 114 downwards, the connecting copper sheet 112 is separated from the conductive copper sheet a113, and the whole socket is powered off to avoid damage caused by power connection.

Claims

1. An outdoor waterproof anti-electric shock patch board is characterized by comprising a power connection and disconnection mechanism (1), an insulating square cover mechanism (2), a special plug mechanism (3), a lifting power connection mechanism (4) and a power connection and clamping mechanism (5); the insulating square cover mechanism (2) is arranged above the power connection and disconnection mechanism (1), so that the function of sealing the socket is realized; the lifting power connection mechanism (4) is arranged in the power connection and disconnection mechanism (1) and is positioned below the power connection and disconnection mechanism (5), and the power connection and disconnection functions are realized by the up-and-down movement of the lifting power connection mechanism (4); the power-on clamping mechanism (5) is arranged in the insulating square cover mechanism (2) and is positioned above the lifting power-on mechanism (4), and the special plug mechanism (2) is clamped on the insulating square cover mechanism (2) by electrifying the power-on clamping mechanism (5); the special plug mechanism (3) is movably inserted into the jack on the insulating square cover mechanism (2);

the power connection and disconnection mechanism (1) comprises an insulating bottom shell (101), a wired plug (102), a sealing box (103), a conducting wire (104), a water guide hole (105), a groove bump (106), an insulating baffle A (107), a clamping block (108), an electromagnet A (109), an insulating baffle B (110), an iron sheet (111), a connecting copper sheet (112), a conducting copper sheet A (113), an insulating plate (114) and a connecting wire (115); the insulating bottom shell (101) is an insulating shell; the rear end of the plug (102) with the wire passes through a hole on the insulating square cover (201) to be connected with the sealing box (103); the sealing box (103) is fixedly arranged inside the insulating square cover (201); the conductive wire (104) is arranged inside the insulating bottom shell (101), the front end of the conductive wire (104) is communicated with a conductive copper sheet A (113) in the sealing box (103), and the conductive wire (104) is communicated with a U-shaped conductive copper sheet (501); the water guide hole (105) is formed in the bottom of the insulating bottom shell (101); the groove convex block (106) is fixedly arranged at the bottom of the insulating bottom shell (101); the insulating baffle A (107) is arranged at the bottom of the insulating bottom shell (101); the fixture block (108) is arranged at the bottom of the insulating bottom shell (101); the electromagnet A (109) is fixedly arranged in the sealing box (103); four insulation baffles B (110) are fixedly arranged at the upper end inside the seal box (103); the iron sheet (111) is fixedly arranged on a spring on the electromagnet A (109); the insulating plate (114) is fixedly arranged on the iron sheet (111); the two connecting copper sheets (112) are fixedly arranged on the insulating plate (114); the four conductive copper sheets A (113) are respectively and fixedly arranged on the four insulating baffle plates B (110); two connecting wires (115) are provided, one end of each connecting wire (115) is connected with the U-shaped conductive copper sheet (501), the other end of each connecting wire is connected with the electromagnet A (109), and a break point is arranged in the middle of one connecting wire (115).

2. Outdoor waterproof and electrocution-proof patch board according to claim 1, characterized in that the insulating square cover mechanism (2) comprises: the insulation square cover (201), the round hole A (202) and the socket (203); the four jacks (203) are arranged on the upper end face of the insulating square cover (201), and magnets are arranged inside the jacks (203); two round holes A (202) are arranged on the upper end surface of the insulating square cover (201).

3. Outdoor waterproof and electrocution-proof patch board according to claim 1, characterized in that the purpose-built plug mechanism (3) comprises: the plug (301), the conductive copper sheet B (302) and the round hole B (303); the two conductive copper sheets B (302) are fixedly arranged at the bottom of the plug (301), round holes B (303) are formed in the conductive copper sheets B (302), and the round holes B (303) are movably matched with the round fixture blocks (504).

4. Outdoor waterproof and electric shock-proof patch board according to claim 1, characterized in that the lifting power connection mechanism (4) comprises: the device comprises an insulating bottom plate (401), an insulating round rod (402), a spring A (403), a U-shaped fixture block (404), a spring B (405), an insulating shell (406) and a Y-shaped conductive copper sheet (407); the insulating bottom plate (401) is slidably arranged on a sliding groove in the groove bump (106); the insulating round rod (402) is fixedly arranged on the insulating bottom plate (401); the upper ends of the four springs A (403) are fixedly arranged at the bottom of the insulating bottom plate (401), and the lower ends of the four springs A (403) are fixedly arranged on the lower panel of the insulating bottom shell (101); the two U-shaped fixture blocks (404) are slidably arranged in the chutes on the fixture blocks (108), and the upper ends of the U-shaped fixture blocks (404) are movably clamped with the insulating bottom plate (401); the spring B (405) is fixedly arranged at one end of the U-shaped fixture block (404), and the outer end of the spring B (405) is connected with the insulating baffle A (107); the insulating shell (406) is fixedly arranged on the insulating bottom plate (401); the lower end of the Y-shaped conductive copper sheet (407) is fixedly arranged on the insulating bottom plate (401).

5. Outdoor waterproof and electric shock proof patch board according to claim 1, characterized in that said power-on locking mechanism (5) comprises: the device comprises a U-shaped conductive copper sheet (501), screws (502), a socket baffle (503), a circular fixture block (504), a spring C (505), an electromagnet B (506) and U-shaped insulating plastic (507); the U-shaped conductive copper sheet (501) is fixedly arranged inside the insulating square cover (201); the screw (502) is rotatably arranged on the U-shaped conductive copper sheet (501); small cylinders at two ends of the socket baffle (503) are rotatably arranged in circular grooves in the socket (203); the upper end surface of the rear panel of the circular fixture block (504) is slidably arranged in a sliding groove in the socket (203); one end of a spring C (505) is connected with the rear panel of the circular fixture block (504), and the other end of the spring C (505) is connected with an electromagnet B (506); the electromagnet B (506) is fixedly arranged in a square groove in the insulating square cover (201); u-shaped conductive copper sheets (501) are wrapped by U-shaped insulating plastics (507).