CN2252420Y

CN2252420Y - Plug with safety device in it

Info

Publication number: CN2252420Y
Application number: CN 95246687
Authority: CN
Inventors: 黄浙川
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-19
Filing date: 1995-12-19
Publication date: 1997-04-16
Anticipated expiration: 2005-12-19

Abstract

The utility model relates to a plug with a safety device thereof, composed of an outer shell body, a conductive inserting slice, an insulated wire, the safety device, etc., wherein, the conductive inserting slice is inserted in a socket for obtaining current. The insulated wire is connected with the plug and an electrical appliance. Moreover, the conductive inserting slice and the insulated wire are connected in the outer shell body. The safety device is arranged between at least one conductive slice and an insulated wire. The interior of the safety device comprises a movable contact connected with two metal slices and the conductive inserting slice by heat movement, a fixed contact connected with the insulated wire and the insulated structure of a broken circuit. The insulated structure of the broken circuit is embedded with the broken circuit maintained between the two contacts.

Description

The plug of built-in protective device

The relevant a kind of plug of the utility model with insurance safeguard function; be meant a kind of plug of built-in protective device especially, be provided with protective device between conduction inserted sheet and the insulated conductor in its shell body, this protective device can auto-cutout when electric current is excessive; thereby protection electrical equipment, Electrical Safety.

Along with electricity usage is more prevalent, the improper unexpected storms that causes of electricity consumption is also said frequently, therefore improves the unscientific place in the existing power consumption equipment, and it is necessary strengthening safeguard procedures.Method commonly used at present is to install current-limiting apparatus on the main line of each power consumption equipment, as fuse, circuit breaker etc., can cut off circuit when electric current is excessive, but owing to must change again after the blowout, uses inconvenience, is progressively eliminated.Circuit breaker is then because complex structure, and the price comparison costliness was if every circuit all uses, not only uneconomical but also certain difficulty arranged.So general circuit breaker is all made big current specification, several line sharings, the sensitivity of circuit breaker just is difficult to satisfy the requirement of all kinds of electric appliance circuits like this.

In addition about the obtaining of electric power, except that fixing direct connection, simple and directly method be that plug is inserted in the socket.But general plug is to be provided with conduction inserted sheet (number of conduction inserted sheet is decided on power supply) at the header body front end, and there is the lead of similar number the rear end, lead and conduction inserted sheet corresponding one by one linking to each other in its body.During use, the conducting strip in conduction inserted sheet and the socket contacts just obtains electric power, provide protection but can't transship to the electrical equipment electricity consumption.Therefore, when current anomaly was not enough to drive the circuit breaker action but may makes electrical equipment impaired, common plug just was difficult to reach real Electrical Safety.

The utility model improves according to the shortcoming of above-mentioned plug, makes it safety and practicality.

The purpose of this utility model is to provide a kind of plug with protective device; be provided with protective device between its conduction inserted sheet and the insulated conductor; this protective device utilization heat action bimetal leaf or thermistor element are controlled contacting of its movable contact and fixed contact; but auto-cutout when making electric current excessive; insulating barrier is stuck between movable contact and the fixed contact to keep open-circuit condition, prevents that electrical equipment from damaging.And after fault was got rid of, available dividing plate driving lever was pushed insulating barrier open, the contacting of reactivate contact and fixed contact.

Further specify concrete structure of the present utility model below in conjunction with accompanying drawing and embodiment:

Fig. 1 is the utility model example structure schematic diagram;

Fig. 2, Fig. 3 are the utility model embodiment side cutaway views;

Fig. 4, Fig. 5 are the utility model embodiment top plan view;

Fig. 6, Fig. 7 are structure and the action schematic diagrames of another embodiment of the utility model.

Seeing also Fig. 1 to Fig. 5, is the primary structure schematic diagram of embodiment of the present utility model, and five figure can find out clearly that the utility model mainly comprises thus: parts such as shell body 1, conduction inserted sheet 2, insulated conductor 3 and protective device 4; The inserted sheet 2 that wherein conducts electricity matches in shell body 1 with insulated conductor 3 and is connected, and protective device 4 is located at least between the conduction inserted sheet 2 and insulated conductor 3 of one of them.Protective device 4 mainly is to be provided with the seat 41 that opens circuit in the protective device shell 47, and this seat 41 that opens circuit is provided with and conducts electricity the heat action bimetal leaf 43 that inserted sheet 2 is connected, after this heat action bimetal leaf 43 extends combination by two sides, with elasticity guide card 441 connection movable contacts 44; The fixed contact 42 that the opposite side setting is connected with insulated conductor 3 in the protective device shell 47 makes fixed contact 42 and movable contact 44 be the nature contact condition; Also be provided with bearing 452 in the protective device shell 47 in order to supporting clapboard driving lever 451, this dividing plate driving lever 451 stretches out protective device shell 47, and its other end then extends to the two point next door for insulating barrier 45, and insulating barrier 45 back are provided with driving lever spring 453.When normal operating condition, electric current flows to conduction inserted sheet 2, a tunnel by socket and directly flows in the electrical equipment through insulation lead 3, another Lu Jingre action bimetal leaf 43 and contacted movable contact 44, fixed contact 42, flow to electrical equipment by insulated conductor 3 again, thereby form normal current circuit.

When having super-high-current to flow through when using electrical equipment of the present utility model to be in abnormal operating state, heat action bimetal leaf 43 is crooked because of big electric current produces high heat, driving elasticity guide card 441 makes movable contact 44 break away from fixed contact 42 turn-off current loops, at this moment, insulating barrier 45 is stretched between the two point by 453 effects of driving lever spring, make movable contact 44 and fixed contact 42 keep open-circuit condition to guarantee safety, and dividing plate driving lever 451 protrudes from the surface of shell body 1, after undesired fault is got rid of, by dividing plate driving lever 451 insulating barrier 45 being skidded off between the two point restores to the original state, 441 of elasticity guide cards drive movable contact 44 and are returned to and fixed contact 42 state of contact, continue normal operating conditions.

Fig. 6 and Fig. 7 are the structures and action schematic diagram of another embodiment of the present utility model, two figure as can be known thus: the utility model is provided with the seat 41 that opens circuit at least between a conduction inserted sheet 2 and insulated conductor 3, protruding fixed contact 42 on this seat 41 that opens circuit, fixed contact 42 belows are provided with by the two other heat action bimetal leafs 43 that extend forward, this heat action bimetal leaf 43 binding site is in front established kink 431, and extend back elasticity guide card 441 in the middle of heat action bimetal leaf 43 by kink 431, these elasticity guide card 441 ends are provided with movable contact 44 and contact with fixed contact 42, when electric current is excessive, heat is moved bimetal leaf 43 bendings and is made movable contact 44 break away from fixed contacts 42, this moment, the shape of kink 431 made heat action bimetal leaf 43 be card folding state and keep open circuit, after fault is got rid of, available answer depression bar 46 makes the answer normal operating condition, and replys the elastic returning original position that depression bar 46 utilizes returning spring 461.

As from the foregoing, the utlity model has the prevention abnormal current flow through electrical equipment, guarantee the function of Electrical Safety, and improved plug in the past and can't take precautions against the shortcoming that big electric current causes contingency, reach not only safety but also economic purpose.

Claims

1. the plug of a built-in protective device, it comprise by shell body, conduction inserted sheet, insulated conductor, and institute such as protective device form; It is characterized in that: be provided with protective device between at least one pair of conduction inserted sheet and the insulated conductor; comprise the seat that opens circuit in the shell of this protective device; this seat that opens circuit is provided with fixed contact that is connected to insulated conductor and the movable contact that is connected with the conduction inserted sheet by heat action bimetal leaf; the binding site front end of aforesaid heat action bimetal leaf is provided with kink; also be provided with a bearing and stretch out shell body in order to the supporting clapboard driving lever in housing, this dividing plate driving lever can promote insulating barrier.

2. the plug of built-in protective device as claimed in claim 1 is characterized in that the dividing plate driving lever can establish one and reply depression bar, and this depression bar is to support to arrive in the shell of aforementioned protective device with flexible member.

3. the plug of built-in protective device as claimed in claim 1 is characterized in that the protective device shell outside left in the shell body can inject filler.

4. the plug of built-in protective device as claimed in claim 1 is characterized in that heat action bimetal leaf is to extend to terminal being returned by the centre with the flexible elasticity guide card of a tool in conjunction with the back by two sides to stretch the linking movable contact.

5. the plug of built-in protective device as claimed in claim 1 is characterized in that the opposite side of insulating barrier is provided with a driving lever spring, can withstand on insulating barrier between the two point when two point is thrown off.