CN2122441U - Safety plug - Google Patents

Abstract

The utility model relates to a safety plug capable of stretching, shrinking and changing distances, which is formed by connecting a safety cover, a spring, a main body of the plug, a self-locking device, an upper cover and a pull resisting ring mechanically, wherein a current carrying piece is injected into the plug main body. A power supply can be inserted or pulled by continuously pressing the upper cover by hand. When the upper cover is pressed, the current carrying piece extends from the safety cover following the main body of the plug, and distances are changed for tightly clamping contact pieces in a socket to achieve firm contact. When the current carrying piece reaches to certain motion to tightly clamp the contact pieces in the socket, the self-locking mechanism and the safety cover are locked by self, a circuit power supply is switched on, the upper cover is pressed again, and the self locking mechanism is unblocked. The current carrying piece of the main body of the plug is carried back into the safety cover under the action of spring force, and changed distances are restored to an original state by the own elasticity of the current carrying piece.

Description

Safety plug

The utility model belongs to circuit connector, is a kind of reliable attaching plug of flexible displacement functional safety that has.

At present; commercially available attaching plug; when needs are switched on or switched off power supply, plug must be inserted or extracts in the seat; long so frequent Plug Action causes the fatigue deformation of current carrying lug on the plug, makes plug current carrying lug and socket loose contact, has had a strong impact on the reliability of plug connector; make the electric current instability; so that damage power consumption equipment, in addition, because of commercially available plug not to the safety precautions of current carrying lug, electric shock accidents very easily takes place.China's utility model patent communique is disclosed on September 21st, 1988, notification number is that the advantage of GG37206605's " safe electrical appliance connector " described utility model is: " be provided with indicating member on socket, and can judge the do not work outage or the power outage of instrument by the demonstration of unit ".But its existing problems are: necessary supporting use, can't be supporting with commercially available common socket, and the cost height, complex structure.

The purpose of this utility model is: a kind of " safety plug " is provided, to reach the purpose of easy to use, safe and reliable connection power supply, fundamentally eliminate the disadvantage of plug and socket loose contact, and changed traditional plug using method, only need press loam cake of the present utility model continuously just can finish the function that is switched on or switched off power supply.The current carrying lug of the utility model plug is foolproofly under safety guard protection to carry out work; " being tired of " thereby of having changed ordinary plug (refers to insert continuously or extract especially to active socket; with the hands execution when extracting), " fearness " (is afraid of to get an electric shock; because of the action of plug is live line working), the drawback of " worrying " (plug loose contact), the utility model is novel in sum, effect is brand-new.

The purpose of this utility model is achieved in that safety guard, spring, plug body, current carrying lug, self-locking device, retaining nut, loam cake, Fang Laquan become extended spread vertically; be switched on or switched off circuit power; only need the utility model plug is placed on above the general socket; press the plug loam cake with hand; continuous action can be finished; so it is very convenient; and when above action; the current carrying lug of plug carries out under the protection of safety guard all the time; eliminated human electric shock's possibility fully, so as safe as a house.Current carrying lug insert socket simultaneously it also have displacement and in to socket contact chip carry out the function that clamps, guaranteed the reliability of the attaching plug of power consumption equipment.The utility model plug also has self-locking device, under the situation of plug insertion socket, and main plug and safety guard self-locking, guarantee the insertion state, when need are extracted, as long as press the plug loam cake, self-locking device is just thrown off automatically, and under the spring force effect, the plug current carrying lug is got back in the safety guard.Load onto Fang Laquan, can prevent to draw bad power line.

Owing to adopted such scheme, make more convenient, safe, the connection line power supply reliably of plug.It is simple in structure, cost is low, elegant in appearance, this shows that the design of this utility model is creative.

Further specify this use is novel below in conjunction with drawings and Examples.

Fig. 1 is circuit theory diagrams of the present utility model.

Fig. 2 is a front view of the present utility model.

Fig. 3 is the A-A cutaway view of Fig. 2.

Fig. 4 is that the K of Fig. 2 is to view.

Among the figure: 1, safety guard 2, spring 3, plug body 4, retaining nut 5, current carrying lug 6, loam cake 7, latch nook 8, Fang Laquan

In Fig. 2, plug body 3 is that interior current carrying lug is parallel injection molded, and the current carrying lug 5 wiring screws that curve 90 ° are arranged above the plug body, when the current carrying lug middle and lower part curves a boss current carrying lug and stretches out downwards below the plug body and then two current carrying lug displacements.The plug body upper surface is provided with a supported hole, be used for placing a usefulness that goes up of latch nook 7, at upper surface projection one screw thread step, to connect loam cake 6, there is a cannelure plug body lower surface, be stuck in the inside when placing spring 2, the plug body center left has a rectangular through hole, self-locking wall energy when plug body glides on the safety guard 1 is passed through wherein, one symmetrical channels is arranged on the plug body maximum gauge, and the symmetrical raised line on it and the safety guard 1 matches, and the opening part of safety guard 1 has screw thread and retaining nut 4 mutually in succession, its inwall has 2 raised line symmetry energies to make plug body slide up and down the location, in case its rotation.In the left side of safety guard 1 bottom centre's line one self-locking wall is arranged, self-locking grooves is arranged on it, the bottom also has the rectangular through hole that current carrying lug passes through simultaneously, and a bulge loop is arranged on the inner face of bottom, makes the spring location.The top of loam cake 6 has a side opening to be used for passing power line, the lower end has internal thread to tighten with plug body to be connected, latch nook is one and goes up axle and a lower shaft, the centre has a steel disc to connect, in the supported hole on it above axle plug body 3, lower shaft then installs in the self-locking wall groove of safety guard 1, the anti-circle 8 that draws is for preventing that lead is pulled out plug body to be designed outward, plug assemble sequence of the present utility model is such, earlier spring 2 is put into safety guard 1, again latch nook 7 is packed in the supported hole of plug body 3, plug body 3 and latch nook are put into safety guard along the slip of safety guard 1 inwall symmetrical channels, then with retaining nut 4: be screwed to the screw thread place on the safety guard 1, tighten, this moment, spring 2 had the thrust of 0.5Kg to get final product, power lead is passed the side opening of loam cake 6, and put the anti-circle 8 that draws, and lead is connected on the screw thread of 90 ° of turn of bilges of current carrying lug, loam cake 6 and boss rank, plug body upper surface screw thread are tightened can be finished whole assembly works then.Holding function of the present utility model is so in proper order: press loam cake 6 with hand; just promoting plug body 3 inserts in the hole of commercially available socket by being threaded downwards with current carrying lug 5; when current carrying lug moves downward; safety guard 1 just forces its displacement by the rectangular through hole of current carrying lug 5 because current carrying lug 5 has certain angle; so just, make current carrying lug 5 clamp the interior contact chip of socket; and latch nook 7 rotates an angle and just hooks following step in the self-locking grooves on the safety guard 1 to a certain degree the time when plug body 3 operation downwards; this moment, plug was in self-locking state; then need click loam cake 6 again if pull the plug out of the socket makes latch nook 7 rotate an angle again; it is another side channel of self-locking grooves on the self-locking wall just; plug body just automatically resets under the effect of spring 2; overall process all is that this new type of plug is being placed on the socket, and current carrying lug is finished under airtight safeguard protection.

Annotate: above narration be the design structure basically identical of the safety plug of two-phase power supply lead, have only and will open three rectangular through holes on the safety guard 1, so that by the three-phase current carrying lug.

The utility model is more safer, more reliable, more convenient than existing common plug, and can support the use with general socket, and is practical, be convenient to promote.

Claims (3)

1, a kind of Power supply safety plug, by safety guard, plug body, current carrying lug, spring, self-locking device, loam cake, retaining nut, the anti-circle mechanical connection that draws form, and it is characterized in that Power supply safety plug has a safety guard, and there is a self-locking wall in the left side of its bottom centre's line, self-locking grooves is arranged on it, the bottom also has the rectangular through hole that current carrying lug passes through simultaneously, and a bulge loop is arranged on the inner face of bottom, makes the spring location; The opening part of safety guard has screw thread and retaining nut 4 mutually in succession, the plug body upper surface is provided with the axle of going up of placing latch nook 7 in the supported hole hole, end face has a projection and establishes the screw thread step thereon, to connect loam cake 6, there is a cannelure plug body lower surface, spring 2 is stuck in the inside, the plug body center left has a rectangular through hole, the self-locking wall energy is passed through wherein, one symmetrical channels is arranged on the plug body maximum gauge, symmetrical raised line on it and the safety guard 1 matches, there is a side opening top of loam cake 6 wearing power line, and the lower end has internal thread to tighten with plug body to be connected, and latch nook is one and goes up axle and a lower shaft, the centre has a steel disc to connect, and lower shaft then installs in the self-locking wall self-locking grooves of safety guard 1 in the supported hole on it above axle insertion main body 3.

2, safety plug according to claim 1, it is characterized in that: when the current carrying lug of plug stretches out safety guard insertion socket, change the distance between the current carrying lug, curve a contact chip in the boss clamping socket in the middle and lower part thereby the top of current carrying lug curves 90 ° of right angles.

3, safety plug according to claim 1 is characterized in that: self-locking device is made up of latch nook, supported hole and self-locking grooves.

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