CN101051723A

CN101051723A - Self locking protective structure for dry burning

Info

Publication number: CN101051723A
Application number: CNA2007100673355A
Authority: CN
Inventors: 张巨登
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-13
Filing date: 2007-02-13
Publication date: 2007-10-10

Abstract

The protection architecture includes two pieces of heated spring pieces, and a push rod below the spring pieces. Characters are that groove is made at middle of the push rod; one end of a spring steel wire is fixed on a side of the push rod; being withstood by a wedge-shaped stopper, the spring steel is attached to surface of the push rod. When spring pieces is heated to be bent downward so as to oppress the push rod to move downwards; thus, the spring steel is clipped to groove in the push rod so as to lock the push rod. The self-locking protection state prevents electro- apparatus from dry baking and overheating phenomena. The invention raises safe reliability.

Description

A kind of dry burning self-lock protection structure

Technical field

The present invention relates to a kind of dry burning self-lock protection structure, particularly a kind of dry burning self-lock protection structure that is applicable to electric connector.

Background technology

The existing electric connector that is used for cordless electric appliance, general all by a plug with its mutually the socket of fit form, socket usually and consuming device make one, plug is connected with power line, when making electrical appliance, power line on the plug connects power supply and as pedestal, the socket of making one with consuming device places on the plug, the work of promptly switching on, so just can be so that consuming device is broken away from the puzzlement of power line, very convenient, and it is safe and reliable, the patent No. is that the Chinese utility model patent " electrical cnnector " of CN00233024.5 discloses so a kind of electrical cnnector by socket and the mutual fit of plug, the binding post that annular is arranged in the socket, the elasticity electric contact point that combines with annular binding post in the described socket is arranged on the plug, the binding post of annular is by the inwall of conduction in the described socket, outer wall and intermediate insulation material layer are formed, each elasticity electric contact point on the plug has dead ring isolated, when plug combines with socket, each annulus wall in each elasticity electric contact point on the plug and the socket combines, avoid the generation of electric arc, each is organized all has dead ring isolated between the contact, and the contact of zero potential is between the phase line, connector insulation shielding performance is further improved, guaranteed the safe and reliable of use.

When this class electricity connector is used to add the electric cup of hot water, each elasticity electric contact point on the plug connects power supply, a metal derby is put in the socket upper surface, the electric cup body is promptly placed on it, between electric cup body and horizontal metal piece, have two shell fragments that independently are heated, be heated shell fragment below is two to thoroughly do away with the edge push rods, when this shell fragment that is heated generates heat under the situation of the dry combustion method of electric cup body, burning, be bent downwardly, and depress push rod, contacting of push rod and then disconnection elasticity electric contact point and power supply, thus outage prevents dry combustion method, burning.But a period of time after disconnecting, the shell fragment temperature descends owing to be heated, can recover original state again, push rod can rebound again after losing the pressure of the shell fragment that is heated, thereby makes the elasticity electric contact point contact energising again with power supply, the dry combustion method electric cup, so again and again, not only electric heater itself is brought influence useful life, and under unserviced situation, be easy to take place security incident, require further improvement its structure thus, with reliability and the fail safe that guarantees that such long term device is used.

Summary of the invention

Technical problem to be solved by this invention provides a kind of dry burning self-lock protection structure, when auto power off under the situation of consuming device dry combustion method and lock this off-position, guarantees the fail safe of consuming device.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this dry burning self-lock protection structure; it includes two shell fragments that are heated; place the push rod under the shell fragment that is heated; it is characterized in that: have groove in the middle of at least one described push rod; be provided with the fixing elastic wire of an end in push rod one side, described steel wire is held out against by a wedge-shaped catch and is affixed on the push rod surface, and being heated at the shell fragment that is heated is bent downwardly under the state that the compressing push rod moves downward; elastic wire snaps in the push rod groove, the locking push rod.

In order to guarantee push rod when pressing down, elastic wire can accurately snap in the push rod intermediate groove, and described push rod is preferably cylindric, and its groove is and the suitable annular groove of elastic wire external diameter.

For making elastic wire after snapping in the push rod annular groove; be easy to return to the state of being close to the push rod outer peripheral face; a groove can be offered in described wedge-shaped catch upper surface; be provided with in the groove end fixing compress steel wire; this compresses steel wire and has a downward power, impels people when mentioning socket, wedge-shaped catch to pressing down; elastic wire is ejected, cancellation self-lock protection state from annular groove.

Compared with prior art, the invention has the advantages that setting by push rod intermediate annular groove, and the design of the elastic wire that cooperates with it, make and be heated shell fragment, when the compressing push rod moves downward at heated bending, allow elastic wire snap in annular groove, keep this self-lock protection state, mention socket, because wedge-shaped catch moves downward under the effect that compresses steel wire up to people, thereby elastic wire is ejected, cancellation self-lock protection state from annular groove; So just can avoid not having the generation of self-lock protection structure dry combustion method repeatedly, burn-off phenomenon, improve the safety and reliability of consuming device greatly.

Description of drawings

Fig. 1 is a kind of schematic perspective view with socket of dry burning self-lock protection structure of the embodiment of the invention;

Fig. 2 removes upper surface metal derby structural representation for socket among Fig. 1;

Fig. 3 snaps in structural representation behind the annular groove for elastic wire among Fig. 2;

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Shown in Fig. 1～3, have the socket of dry burning self-lock protection structure for the embodiment of the invention is a kind of, such socket is used with corresponding plug, can be applicable to the electric connector of wireless electric heating vessel; As shown in Figure 1, dry burning self-lock protection structure places socket inside, and the socket upper surface is a metal derby 1, two shell fragment 2 one sides of independently being heated mutually are fixed on the metal derby 1, opposite side is by the sky of opening on the metal derby 1, and can be heated is bent downwardly, and compressing push rod 4 moves downward; Have two in a side of socket and stretch into socket inside,, be used to be connected to consuming device with movable contact spring 5 contacted lug plates 3;

Right side push rod 4 is cylindrical, has an annular groove 41 in the middle of it, is the fixing elastic wire 8 of one one end on its right side, and this elastic wire 8 is held out against by a wedge-shaped catch 7 and is affixed on the surface of push rod 4; These wedge-shaped catch 7 upper surfaces have a groove 71, be provided with in the groove 71 end fixing compress steel wire 6, this compresses steel wire 6 and gives wedge-shaped catch 7 with certain power, thereby guarantees that elastic wire 8 is close to the surface of push rod 4, shown in Fig. 2,3;

Operation principle when this dry burning self-lock protection structure is applied to wireless electric water-heating cup is such: this wireless electric water-heating cup has an electric cup body, and merge the electric connector of can counterrotating plug and socket forming by a pair of mutual cover, the electric cup body is fixed on the metal derby 1 of socket upper surface, dry burning self-lock protection structure just is arranged on socket inside, during operate as normal, plug connects power supply, plug and socket plug together, and give heat cup intrinsic heating wire power supply heating electric cup intrinsic water by two lug plates 3 of socket again; When dry combustion method or burning, because heating-up temperature is too high, can impel shell fragment 2 temperature of being heated between the metal derby 1 of electric cup body and socket upper surface to raise, be heated and be bent downwardly, thereby compressing push rod 4 moves downward, push rod 4 moves downward a movable contact spring 5 toward pressing down, movable contact spring 5 and lug plate 3 are broken away from, thereby make the intrinsic heating wire cut-off of electric cup, prevent dry combustion method or burning, when push rod 4 moves downward, the bullet shape steel wire 8 of being close to push rod 4 surfaces can snap in the annular groove 41 at push rod 4 middle parts, thereby locks this guard mode, prevents to be heated shell fragment 2 when temperature reduces bounce-back, push rod 4 rebounds thereupon, causes dry combustion method repeatedly, the generation of burn-off phenomenon; Simultaneously; when it is found that dry combustion method or burn-off phenomenon; mention the electric cup body; socket breaks away from plug thereupon; wedge-shaped catch 7 in the dry combustion method protection structure can move downward under the pressure that compresses steel wire 6, snaps in elastic wire 8 in push rod 4 annular grooves 41 along with the release of pressure under the compressing of wedge-shaped catch 7, can eject from groove; thereby push rod 4 moves upward again, returns to normal.

Claims

1, a kind of dry burning self-lock protection structure; it includes two shell fragments that are heated; place the push rod under the shell fragment that is heated; it is characterized in that: have groove in the middle of at least one described push rod; be provided with the fixing elastic wire of an end in push rod one side, described steel wire is held out against by a wedge-shaped catch and is affixed on the push rod surface, and being heated at the shell fragment that is heated is bent downwardly under the state that the compressing push rod moves downward; elastic wire snaps in the push rod groove, the locking push rod.

2, dry burning self-lock protection structure according to claim 1 is characterized in that: described push rod is cylindric, and its groove is and the suitable annular groove of elastic wire external diameter.

3, dry burning self-lock protection structure according to claim 1 is characterized in that: described wedge-shaped catch upper surface has a groove, be provided with in the groove end fixing compress steel wire.