阅读说明：本技术 一种易拔的防短路插头插座 (Easy-to-pull short-circuit-proof plug and socket ) 是由 罗本龙 于 2020-08-12 设计创作，主要内容包括：本发明涉及插头插座相关领域,尤其是一种易拔的防短路插头插座,包括插座以及设置在所述插座内部向上开口且左右对称的触头槽,右侧的所述触头槽左侧壁上下对称设置有向所述插座内延伸的弹簧腔,所述弹簧腔内部滑动设置并通过弹簧连接有弹簧块,本发明提供的一种易拔的防短路插头插座,能够实现插头于插座之间的使用时牢固配合,并且在拔出时采用按钮式弹出,十分方便且省力,让一些力气小的使用者更容易拔出插头,同时该插座还具有可反复使用的防短路装置,利用短路造成的高电流将插头快速的弹出,来保护电器的安全,避免的电器烧坏甚至发生火灾的可能,极大的提高了使用的安全性。(The invention relates to the relevant field of plug and socket, in particular to an easy-to-pull short-circuit prevention plug and socket, which comprises a socket and contact slots which are arranged in the socket, are opened upwards and are symmetrical left and right, the left side wall of the contact slot on the right side is provided with spring cavities which extend into the socket in an up-and-down symmetrical manner, the inner parts of the spring cavities are arranged in a sliding manner and are connected with spring blocks through springs, the easy-to-pull short-circuit prevention plug and socket provided by the invention can realize the firm matching of a plug between the sockets during use, and the plug is popped out in a button type manner during pulling out, so that the socket is very convenient and labor-saving, a user with small strength can pull out the plug more easily, meanwhile, the socket is also provided with a reusable short-circuit prevention device, the high current caused by short circuit is used for popping out the plug quickly, the safety of use is greatly improved.)

1. The utility model provides an easy short circuit prevention plug and socket who pulls out, is in including socket and setting the inside upwards opening of socket and bilateral symmetry's contact groove, its characterized in that: the left side wall of the contact groove on the right side is provided with spring cavities extending into the socket in an up-and-down symmetrical manner, the inner part of each spring cavity is provided with a spring block in a sliding manner and is connected with the spring block through a spring, the left end face of each spring block is fixedly provided with a convex block, the contact groove on the left side is provided with the convex block which is the same as the right side, and the convex block can block a groove arranged on the contact, so that the plug is not easy to fall off after being plugged tightly, the inner part of the socket is provided with conductive cavities on the lower side of the contact groove in an bilateral symmetrical manner, the top of each conductive cavity is provided with a pressure rod extending into the contact groove in a sliding manner, the outer surface of each pressure rod is fixedly provided with spring plates which are positioned in the conductive cavities and are connected with the top walls of the conductive, the bottom of the conductive rod is connected with a connecting shaft positioned in the conductive cavity through a spring, a conductive sleeve is arranged on the outer surface of the connecting shaft in a sliding manner, a first connecting rod is fixedly arranged at the bottom of the connecting shaft, a support is fixedly arranged on the bottom wall of the conductive cavity, the first connecting rod and the pressure rod are hinged with each other through a second connecting rod which is rotatably arranged on the support, when the contact is pressed downwards, the connecting shaft drives the conductive rod to ascend and contact the contact to be electrified, parts arranged in the conductive cavity on the right side are the same as those arranged in the conductive cavity on the left side, the conductive sleeve on the left side is connected with a live wire leading to the outside of the socket, and the conductive sleeve on the right side is connected with a zero; the socket is internally provided with a bouncing device which is positioned on two sides of the contact grooves, the bouncing device enables the plug to be convenient to lift and pull out, the socket is internally provided with a protection device which is positioned between the contact grooves, and the protection device can timely bounce the plug out to protect the electrical appliance when the electrical appliance connected with the plug is in short circuit.

2. The easy-to-pull short-circuit prevention plug and socket as claimed in claim 1, wherein: the bouncing device comprises a button groove which is arranged on the top wall of the socket and extends inwards, a first piston cavity which is positioned on the lower side of the button groove is arranged in the socket, a first piston block is arranged in the first piston cavity in an up-and-down sliding manner, a first piston rod which extends into the button groove is fixedly arranged at the top of the first piston block, a button which is positioned in the button groove and connected with the bottom wall of the button groove through a spring is fixedly arranged at the top of the first piston rod, the bouncing device also comprises second piston cavities which are symmetrically arranged in the socket and positioned at two sides of the contact groove, the second piston cavities are communicated with the first piston cavity through a first air pipe, a second piston block is arranged in the second piston cavity in an up-and-down sliding manner, a second piston rod which extends to the top of the socket is fixedly arranged at the top of the second piston block, when a user needs to pull out the plug, the button is pressed down, so that the first piston rod drives the first piston block to move downwards in the first piston cavity, gas in the first piston cavity is pressed into the second piston cavity through the first air tube, the second piston block drives the second piston rod to move upwards, the second piston rods on two sides of the contact push the plug upwards, and the plug is pulled out more easily after the groove is separated from the protruding block.

3. The easy-to-pull short-circuit prevention plug and socket as claimed in claim 1, wherein: the protection device comprises a first transmission cavity which is arranged in the socket and is positioned on the lower side of the first piston cavity, a second transmission cavity which is positioned on the lower side of the first transmission cavity is arranged in the socket, the top of the first transmission cavity is rotationally provided with a first rotating shaft which extends into the second transmission cavity, the outer surface of the first rotating shaft is fixedly provided with a rotor which is communicated with the live wire and the zero line and is positioned in the first transmission cavity, the left side wall and the right side wall of the first transmission cavity are symmetrically and fixedly provided with fixed blocks, the fixed blocks are fixedly provided with stators which are used for sheathing the rotor, the outer surface of the rotor is fixedly provided with a first belt wheel which is positioned in the second transmission cavity, the top of the second transmission cavity is rotationally provided with a second rotating shaft which is positioned on the right side of the rotor, and the outer surface of the second rotating shaft is fixedly provided with a second belt wheel, the top of the second transmission cavity is fixedly provided with a resistance block which is in contact with the second belt wheel and can provide certain friction resistance to prevent the second belt wheel from rotating, the bottom of the second rotating shaft is connected with a sliding shaft in a matching way, limiting grooves are symmetrically arranged in the sliding shaft at the left and right sides, the side walls of the second transmission cavity at the left side and the right side of the sliding shaft are fixedly provided with limiting blocks, the end surfaces of the limiting blocks are fixedly provided with limiting rods extending into the limiting grooves, the limiting rods limit the sliding shaft to rotate, thereby driving the sliding shaft to move up and down when the second rotating shaft rotates, a third piston cavity positioned at the lower side of the second transmission cavity is arranged in the socket, the third piston block is arranged in the third piston cavity in a vertically sliding mode, and a third piston rod which extends into the second transmission cavity and is fixedly connected with the bottom of the sliding shaft is fixedly arranged at the top of the third piston block.

4. The easy-to-pull short-circuit prevention plug and socket as claimed in claim 1, wherein: the protection device also comprises an elastic block cavity which is arranged on the top wall of the socket and extends inwards and is positioned between the contact grooves, the bottom of the elastic block cavity is fixedly provided with a fixed seat, an elastic block which is connected with the fixed seat through a compression spring is arranged in the elastic block cavity in a sliding way, the bottom of the elastic block is symmetrically hinged with clamping jaws at two sides of the fixed seat in a left-right way, the clamping jaws are clamped by clamping grooves arranged at the left side and the right side of the fixed seat, a fourth piston cavity which is communicated with the third piston cavity through a second air pipe is arranged in the fixed seat, a fourth piston block is arranged in the fourth piston cavity in a vertical sliding way, a fourth piston rod is fixedly arranged at the top of the fourth piston block, the left side wall and the right side of the fixed seat are symmetrically provided with inwards extending ejector block grooves, an ejector block is arranged in the ejector block grooves in a sliding way, and an ejector rod which extends into the fourth piston cavity and is hinged, when the electrical appliance connected with the plug is normally powered on, the current in the live wire and the zero wire is normal, the force between the induction magnetic field in the rotor and the stator is small, the first rotating shaft cannot rotate under the resistance of the resistance block, when the electrical appliance connected with the plug is short-circuited, the current in the live wire and the zero wire is instantly increased, so that a large force is generated between the rotor and the stator, and a large enough torque is generated in the first rotating shaft to drive the first belt wheel and the second belt wheel to overcome the resistance of the resistance block to rotate, so that the second rotating shaft rotates, the sliding shaft is driven to move downwards, the third piston block is driven to move downwards, and the gas in the third piston cavity is pressed into the fourth piston cavity through the second gas tube, so that the fourth piston block moves upwards, therefore, the ejector rod drives the ejector block to move towards the elastic block cavity to push the clamping jaw to rotate, so that the elastic block is rapidly bounced upwards under the action of the compression spring, and the plug can be bounced out to protect an electric appliance.

Technical Field

The invention relates to the field of plug and socket correlation, in particular to an easily-pulled short-circuit-proof plug and socket.

Background

Along with the improvement of people's quality of life, domestic appliance's rate of utilization is improvement also by a wide margin, bring along therewith that the use quantity of socket is also more and more, there are a lot of various sockets on the market, but socket in the past has some inconveniences when using, do not save effort when we insert and extract, the plug is hardly pulled out, give people the experience that is not good, put in the past simultaneously and prevent that short circuit socket all is the mode that uses built-in fuse to protect electrical apparatus, need unpack apart and change the fuse after a short circuit, very inconvenient, so necessary design a novel short circuit prevention plug and socket that easily pulls out, solve the problem that above-mentioned exists.

Disclosure of Invention

The invention aims to provide an easily-pulled short-circuit-proof plug and socket, which can overcome the defects in the prior art, thereby improving the practicability of equipment.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an easy-to-pull short-circuit-proof plug socket, which comprises a socket and bilaterally symmetrical contact grooves which are arranged in the socket and have an upward opening, a contact of a plug can be inserted into the contact grooves, the left side wall of the right side contact groove is vertically and symmetrically provided with spring cavities which extend into the socket, the inner parts of the spring cavities are arranged in a sliding manner and are connected with spring blocks through springs, the left end surface of each spring block is fixedly provided with a convex block, the left side contact groove is provided with the convex block which is the same as the right side convex block, and the convex block can clamp a groove arranged on the contact, so that the plug is not easy to fall off after being tightly inserted, the inner parts of the socket are bilaterally symmetrical provided with conductive cavities which are positioned at the lower sides of the contact grooves, the top parts of the conductive cavities are provided with pressing rods which extend into the contact grooves in a sliding manner, the, the top wall of the conductive cavity is symmetrically provided with conductive rods which are positioned at two sides of the pressure lever and extend into the contact groove in a sliding manner, the bottom of the conducting rod is connected with a connecting shaft positioned in the conducting cavity through a spring, a conducting sleeve is arranged on the outer surface of the connecting shaft in a sliding manner, a first connecting rod is fixedly arranged at the bottom of the connecting shaft, a bracket is fixedly arranged on the bottom wall of the conductive cavity, the first connecting rod and the pressure rod are hinged with each other through a second connecting rod which is rotatably arranged on the bracket, when the contact is pressed downwards to enable the pressure lever to move downwards, the connecting shaft drives the conducting rod to ascend and contact the contact to be electrified, parts arranged in the conducting cavity on the right side are the same as those arranged in the conducting cavity on the left side, the conductive sleeve on the left side is connected with a live wire leading to the outside of the socket, and the conductive sleeve on the right side is connected with a zero wire leading to the outside of the socket; the socket is internally provided with a bouncing device which is positioned on two sides of the contact grooves, the bouncing device enables the plug to be convenient to lift and pull out, the socket is internally provided with a protection device which is positioned between the contact grooves, and the protection device can timely bounce the plug out to protect the electrical appliance when the electrical appliance connected with the plug is in short circuit.

Furthermore, the bouncing device comprises a button groove which is arranged on the top wall of the socket and extends inwards, a first piston cavity which is positioned on the lower side of the button groove is arranged in the socket, a first piston block is arranged in the first piston cavity in an up-and-down sliding manner, a first piston rod which extends into the button groove is fixedly arranged on the top of the first piston block, a button which is positioned in the button groove and connected with the bottom wall of the button groove through a spring is fixedly arranged on the top of the first piston rod, the bouncing device further comprises second piston cavities which are symmetrically arranged in the socket and positioned on two sides of the contact groove, the second piston cavities are communicated with the first piston cavity through a first air pipe, a second piston block is arranged in the second piston cavity in an up-and-down sliding manner, and a second piston rod which extends to the top of the socket is fixedly arranged on the top of the second piston block, when a user needs to pull out the plug, the button is pressed down, so that the first piston rod drives the first piston block to move downwards in the first piston cavity, gas in the first piston cavity is pressed into the second piston cavity through the first air tube, the second piston block drives the second piston rod to move upwards, the second piston rods on two sides of the contact push up the plug, and the plug is pulled out more easily after the groove is separated from the protruding block.

Further, the protection device comprises a first transmission cavity which is arranged inside the socket and is positioned on the lower side of the first piston cavity, a second transmission cavity which is positioned on the lower side of the first transmission cavity is arranged inside the socket, the top of the first transmission cavity is rotatably provided with a first rotating shaft which extends into the second transmission cavity, the outer surface of the first rotating shaft is fixedly provided with a rotor which is communicated with the live wire and the zero wire and is positioned in the first transmission cavity, the left side wall and the right side wall of the first transmission cavity are symmetrically and fixedly provided with fixed blocks, the fixed blocks are fixedly provided with stators which are sleeved on the rotors, the outer surface of the rotor is fixedly provided with a first belt wheel which is positioned in the second transmission cavity, the top of the second transmission cavity is rotatably provided with a second rotating shaft which is positioned on the right side of the rotor, and the outer surface of the second rotating shaft is fixedly provided with a second belt wheel which is connected, the top of the second transmission cavity is fixedly provided with a resistance block which is in contact with the second belt wheel and can provide certain friction resistance to prevent the second belt wheel from rotating, the bottom of the second rotating shaft is connected with a sliding shaft in a matching way, limiting grooves are symmetrically arranged in the sliding shaft at the left and right sides, the side walls of the second transmission cavity at the left side and the right side of the sliding shaft are fixedly provided with limiting blocks, the end surfaces of the limiting blocks are fixedly provided with limiting rods extending into the limiting grooves, the limiting rods limit the sliding shaft to rotate, thereby driving the sliding shaft to move up and down when the second rotating shaft rotates, a third piston cavity positioned at the lower side of the second transmission cavity is arranged in the socket, the third piston block is arranged in the third piston cavity in a vertically sliding mode, and a third piston rod which extends into the second transmission cavity and is fixedly connected with the bottom of the sliding shaft is fixedly arranged at the top of the third piston block.

Further, protection device is still including setting up socket roof inwards extends and is located bullet piece chamber between the contact groove, the fixed fixing base that is provided with in bullet piece chamber bottom, bullet piece intracavity slip be provided with through compression spring with the bullet piece that the fixing base is connected, bullet piece bottom bilateral symmetry is articulated to be provided with and is located the jack catch of fixing base both sides, the jack catch is set up the draw-in groove of fixing base left and right sides blocks, fixing base inside be provided with through the second trachea with the fourth piston chamber of third piston chamber intercommunication, fourth piston intracavity portion slides from top to bottom and is provided with fourth piston piece, the fixed fourth piston rod that is provided with in fourth piston piece top, fixing base left and right sides lateral wall symmetry is provided with the kicking block groove of inwards extending, the inside slip of kicking block inslot is provided with the kicking block, the fixed kicking block end wall be provided with extend to in the fourth piston intracavity and through the third connecting rod with fourth piston rod hinge The push rod is connected, when the electric appliance connected with the plug is normally powered on, the current in the live wire and the zero wire is normal, the force between the induction magnetic field in the rotor and the stator is small, the first rotating shaft cannot rotate under the resistance of the resistance block, when the electric appliance connected with the plug is short-circuited, the current in the live wire and the zero wire is instantly increased, so that a large force is generated between the rotor and the stator, and a large enough torque is generated in the first rotating shaft to drive the first belt wheel and the second belt wheel to rotate by overcoming the resistance of the resistance block, so that the second rotating shaft rotates, the sliding shaft is driven to move downwards, the third piston block is driven to move downwards, and the gas in the third piston cavity is pressed into the fourth piston cavity through the second gas tube, therefore, the fourth piston block moves upwards, the ejector rod drives the ejector block to move towards the elastic block cavity to push the clamping jaw to rotate, and the elastic block is rapidly bounced upwards under the action of the compression spring. Thereby enabling the plug to be ejected to protect the appliance.

The invention has the beneficial effects that: the easily-pulled short-circuit-proof plug and socket provided by the invention can realize firm matching of the plug and the socket in use, and adopts button-type popping when the plug is pulled out, so that the convenience and labor saving are realized, users with small strength can pull out the plug more easily, meanwhile, the socket is also provided with a repeatedly-used short-circuit-proof device, the plug is popped out quickly by utilizing high current caused by short circuit, the safety of an electric appliance is protected, the possibility of burning out the electric appliance and even fire disaster is avoided, and the use safety is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of an easily unplugged anti-short-circuit plug and socket of the present invention;

FIG. 2 is a schematic view of a portion of the enlarged structure of A in FIG. 1;

fig. 3 is a partially enlarged structural diagram of B in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-3, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

With reference to fig. 1-3, an easily-pulled short-circuit-proof plug and socket assembly includes a socket 10 and bilaterally symmetrical contact slots 41 disposed inside the socket 10, a contact 12 of a plug 11 can be inserted into the contact slots 41, spring cavities 46 extending into the socket 10 are disposed on left side walls of the contact slots 41 on the right side in an up-down symmetrical manner, the spring cavities 46 are slidably disposed inside and connected with spring blocks 45 through springs, a protrusion 44 is fixedly disposed on left end surfaces of the spring blocks 45, the protrusion 44 identical to the right side is disposed on the left side walls of the contact slots 41, and the protrusion 44 can block a groove 13 disposed on the contact 12, so that the plug 11 is not easily detached after being tightly inserted, conductive cavities 69 disposed on lower sides of the contact slots 41 are disposed inside the socket 10 in an bilaterally symmetrical manner, and a pressing rod 50 extending into the contact slots 41 is slidably disposed on top portions of the conductive cavities 69, the outer surface of the pressure lever 50 is fixedly provided with a spring plate 56 which is positioned in the conductive cavity 69 and is connected with the top wall of the conductive cavity 69 through a spring, the top wall of the conductive cavity 69 is bilaterally and symmetrically provided with conductive rods 51 which are positioned on two sides of the pressure lever 50 and extend into the contact groove 41, the bottom of the conductive rod 51 is spring-connected with a connecting shaft 52 positioned in the conductive cavity 69, the outer surface of the connecting shaft 52 is provided with a conductive sleeve 53 in a sliding manner, the bottom of the connecting shaft 52 is fixedly provided with a first connecting rod 54, the bottom wall of the conductive cavity 69 is fixedly provided with a bracket 55, the first connecting rod 54 and the pressure lever 50 are hinged with each other through a second connecting rod 57 which is rotatably arranged on the bracket 55, when the contact 12 is pressed downwards, the connecting shaft 52 drives the conductive rod 51 to ascend and contact the contact 12 to be electrified, and parts arranged in the cavity 69 on the right side are the same as those arranged, the conductive sleeve 53 on the left side is connected with a live wire 39 leading to the outside of the socket 10, and the conductive sleeve 53 on the right side is connected with a zero wire 40 leading to the outside of the socket 10; the socket 10 is internally provided with the bouncing devices 71 which are positioned on two sides of the contact grooves 41, the bouncing devices 71 enable the plug 11 to be conveniently lifted and pulled out, the socket 10 is internally provided with the protection devices 72 which are positioned between the contact grooves 41, and the protection devices 72 can timely bounce the plug 11 out to protect an electric appliance when the electric appliance connected with the plug 11 is in short circuit.

Advantageously, the bouncing device 71 comprises a button groove 15 extending inwards at the top wall of the socket 10, a first piston cavity 17 located at the lower side of the button groove 15 is arranged inside the socket 10, a first piston block 18 is arranged inside the first piston cavity 17 in a sliding manner up and down, a first piston rod 16 extending into the button groove 15 is fixedly arranged at the top of the first piston block 18, a button 14 located in the button groove 15 and connected with the bottom wall of the button groove 15 through a spring is fixedly arranged at the top of the first piston rod 16, the bouncing device 71 further comprises second piston cavities 47 symmetrically arranged inside the socket 10 and located at two sides of the contact groove 41, the second piston cavities 47 are communicated with the first piston cavity 17 through a first air pipe 19, a second piston block 49 is arranged inside the second piston cavities 47 in a sliding manner up and down, and a second piston rod 48 extending to the top of the socket 10 is fixedly arranged at the top of the second piston block 49, when a user needs to pull out the plug 11, the button 14 is pressed down, so that the first piston rod 16 drives the first piston block 18 to move downward in the first piston cavity 17, and thus, the gas in the first piston cavity 17 is pressed into the second piston cavity 47 through the first air tube 19, so that the second piston block 49 drives the second piston rod 48 to move upward, and thus, the second piston rods 48 on both sides of the contact 12 push up the plug 11, and the plug 11 is more easily pulled out after the groove 13 is separated from the bump 44.

Beneficially, the protection device 72 includes a first transmission cavity 20 disposed inside the socket 10 and located on the lower side of the first piston cavity 17, a second transmission cavity 25 located on the lower side of the first transmission cavity 20 is disposed inside the socket 10, a first rotating shaft 24 extending into the second transmission cavity 25 is rotatably disposed at the top of the first transmission cavity 20, a rotor 23 communicated with the live wire 39 and the neutral wire 40 and located in the first transmission cavity 20 is fixedly disposed on the outer surface of the first rotating shaft 24, fixed blocks 21 are symmetrically and fixedly disposed on the left and right side walls of the first transmission cavity 20, a stator 22 sheathing the rotor 23 is fixedly disposed on the fixed blocks 21, a first pulley 27 located in the second transmission cavity 25 is fixedly disposed on the outer surface of the rotor 23, a second rotating shaft 30 located on the right side of the rotor 23 is rotatably disposed at the top of the second transmission cavity 25, the outer surface of the second rotating shaft 30 is fixedly provided with a second belt wheel 29 which is connected with the first belt wheel 27 in a matching way through a belt 28, the top of the second transmission cavity 25 is fixedly provided with a resistance block 26 which is contacted with the second belt wheel 29, the resistance block 26 can provide certain friction resistance to prevent the second belt wheel 29 from rotating, the bottom of the second rotating shaft 30 is connected with a sliding shaft 31 in a matching way, the sliding shaft 31 is provided with a limit groove 33 in a bilateral symmetry way, the side walls of the second transmission cavity 25 at the left side and the right side of the sliding shaft 31 are fixedly provided with limit blocks 32, the end surfaces of the limit blocks 32 are fixedly provided with limit rods 34 which extend into the limit grooves 33, the limit rods 34 limit the sliding shaft 31 to rotate, so that the sliding shaft 31 is driven to move up and down when the second rotating shaft 30 rotates, the socket 10 is internally provided with a third piston cavity 35 which is positioned at the lower side of the second transmission, a third piston block 36 is arranged in the third piston cavity 35 in a vertically sliding manner, and a third piston rod 37 which extends into the second transmission cavity 25 and is fixedly connected with the bottom of the sliding shaft 31 is fixedly arranged at the top of the third piston block 36.

Beneficially, the protection device 72 further includes an elastic block cavity 42 disposed on the top wall of the socket 10 and extending inwards and located between the contact grooves 41, a fixed seat 63 is fixedly disposed at the bottom of the elastic block cavity 42, an elastic block 43 connected with the fixed seat 63 through a compression spring 68 is slidably disposed in the elastic block cavity 42, jaws 58 disposed on both sides of the fixed seat 63 are hinged at the bottom of the elastic block 43 in a bilateral symmetry manner, the jaws 58 are clamped by clamping grooves 59 disposed on both sides of the fixed seat 63, a fourth piston cavity 60 communicated with the third piston cavity 35 through a second air tube 38 is disposed inside the fixed seat 63, a fourth piston block 61 is slidably disposed inside the fourth piston cavity 60 up and down, a fourth piston rod 62 is fixedly disposed at the top of the fourth piston block 61, and inwardly extending top block grooves 64 are symmetrically disposed on both sides of the fixed seat 63, the top block groove 64 is internally provided with a top block 65 in a sliding manner, the end wall of the top block 65 is fixedly provided with a top rod 66 which extends into the fourth piston cavity 60 and is hinged with the fourth piston rod 62 through a third connecting rod 67, when an electric appliance connected with the plug 11 is normally powered on, the currents in the live wire 39 and the zero wire 40 are normal, the force between the induced magnetic field in the rotor 23 and the stator 22 is small, the first rotating shaft 24 cannot be rotated under the resistance of the resistance block 26, when the electric appliance connected with the plug 11 is short-circuited, the currents in the live wire 39 and the zero wire 40 are instantly increased, so that a large force is generated between the rotor 23 and the stator 22, and a large enough torque is generated in the first rotating shaft 24 to drive the first belt pulley 27 and the second belt pulley 29 to rotate against the resistance of the resistance block 26, so that the second rotating shaft 30 rotates to drive the sliding shaft 31 to move downwards, thereby driving the third piston block 36 to move downwards, so that the gas in the third piston chamber 35 is pressed into the fourth piston chamber 60 through the second gas pipe 38, thereby driving the fourth piston block 61 to move upwards, so that the ejector rod 66 drives the ejector block 65 to move inwards the elastic block chamber 42 to push the claw 58 to rotate, and thereby the elastic block 43 is rapidly sprung upwards under the action of the compression spring 68. So that the plug 11 can be ejected to protect the appliance.

The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.

Sequence of mechanical actions of the whole device: when the device works, the contact 12 of the plug 11 is inserted into the contact groove 41, so that the protrusion 44 clamps the groove 13, the plug 11 is not easy to fall off after being tightly inserted, and the pressure lever 50 moves downwards while the contact 12 is inserted, so that the connecting shaft 52 drives the conductive rod 51 to ascend and contact the contact 12 for electrifying; when a user needs to pull out the plug 11, the button 14 is pressed down, so that the first piston rod 16 drives the first piston block 18 to move downwards in the first piston cavity 17, and thus, the gas in the first piston cavity 17 is pressed into the second piston cavity 47 through the first air tube 19, so that the second piston block 49 drives the second piston rod 48 to move upwards, and thus, the second piston rods 48 on both sides of the contact 12 push up the plug 11, so that the plug 11 is more easily pulled out after the groove 13 is disengaged from the bump 44; when the electrical appliance connected to the plug 11 is normally powered on, the current in the live wire 39 and the zero wire 40 is normal, the force between the induced magnetic field in the rotor 23 and the stator 22 is small, the first rotating shaft 24 cannot be rotated under the resistance of the resistance block 26, when the electrical appliance connected to the plug 11 is short-circuited, the current in the live wire 39 and the zero wire 40 is instantaneously increased, so that a large force is generated between the rotor 23 and the stator 22, so that a large enough torque is generated in the first rotating shaft 24 to drive the first belt pulley 27 and the second belt pulley 29 to rotate against the resistance of the resistance block 26, so that the second rotating shaft 30 is rotated to drive the sliding shaft 31 to move downwards, so as to drive the third piston block 36 to move downwards, so that the gas in the third piston cavity 35 is pressed into the fourth piston cavity 60 through the second gas pipe 38, so that the fourth piston block 61 moves upwards, and the ram 66 drives the ram block 65 to move inwards the ram block cavity 42 to push the pawl 58 to rotate, so that the ram block 43 is rapidly sprung upwards by the compression spring 68. So that the plug 11 can be ejected to protect the appliance.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.