CN2237292Y

CN2237292Y - Safety plug

Info

Publication number: CN2237292Y
Application number: CN 95227918
Authority: CN
Inventors: 陈根清
Original assignee: HENGJI CO Ltd
Current assignee: HENGJI CO Ltd
Priority date: 1995-11-24
Filing date: 1995-11-24
Publication date: 1996-10-09
Anticipated expiration: 2005-11-24

Abstract

The utility model relates to a safety plug. A bimetal sheet is fixed at one end of an electric plug sheet of the plug. The other end of the bimetal sheet is contacted with a conducting strip. An insulating motion lever with a vertical extending guard sheet is arranged below the bimetal sheet. A spring is arranged on the end of the motion lever, and the end of the motion lever is provided with the guard sheet. When the plug accepts an unexpected current which is unstable, the bimetallic sheet can cause the contacts of the bimetallic sheet to be raised upward since the thermal expansion coefficients of two layers of metal are different, at this time, the spring can push the motion lever to cause the guard sheet to move between the bimetal sheet and the conducting strip, so that the plug is switched off to prevent an electric appliance from being damaged.

Description

Safety plug

The utility model relates to a kind of safety plug, relates to especially a kind ofly can cutting off the power supply immediately when flowing through big burst current, with the safety plug of the unlikely damage of protection electrical equipment.

Electricity is indispensable a kind of energy during the contemporary mankind lives, and household electrical appliance all must make electricity consumption can bring into play its due function, and as refrigerator, television set, washing machine, electric light etc., if there is not electricity, our life will be difficult to the imagination; And these electrical equipment all are to come energized by plug, plug commonly used, as shown in Figure 5, only be in two plug-in sheets 52 of plug 50 internal fixation, side in plug-in sheet 52 is connected with electric wire 40, when plug-in sheet 52 is inserted socket, can conduct electrical currents to electrical equipment through plug-in sheet 52 and electric wire 40, make it to bring into play function.

Plug 50 commonly used only is the media as the electrical equipment energized, but when having big electric current to produce suddenly, the electrical equipment that plug 50 connected tends to therefore damage when electric current is unstable, and this is for losses such as expensive instrument, computer particularly heaviness; Plug 50 commonly used can't provide this kind protective effect to electrical equipment, must install other safety devices separately additional, just can prevent the damage that the electric current shakiness is caused, yet this measure can cause the increase of expense again, increases the weight of user's burden economically.

The purpose of this utility model provides a kind of safety plug; it is provided with carriage release lever and spring by the made bimetal leaf of double-level-metal, insulation material in plug; when plug receives a burst current; the bimetallic sector-meeting is because of the thermal coefficient of expansion difference of double layer of metal; its contact can upwards be lifted, and again because of the thrust of spring, makes catch on the carriage release lever move to the below of bimetal leaf contact; and make the plug outage, do not cause damage with protection electrical equipment because of electric current is unstable.

Another purpose of the present utility model provides a kind of safety plug, and it installs a safety device additional in plug, the effect of electric prospection can be provided, and not need to buy more separately other equipment, to alleviate user's burden economically.

Safety plug provided by the utility model, it is provided with two plug-in sheets between the bottom of plug and loam cake, and a utmost point of electric wire is to be connected on the plug-in sheet, it is characterized in that:

End in another plug-in sheet is formed with a connecting piece, on brace, be fixed with the made bimetal leaf of pair of lamina metal, end in bimetal leaf then forms a contact, its below contacts with a conducting strip, and conducting strip is to be fixed on the bottom, and an end of conducting strip is equipped with a wiring hole, to be connected with another utmost point of electric wire; Again, be provided with the carriage release lever of an insulation material in bimetal leaf below, be formed with a catch, have between end of catch and bottom sidewall in carriage release lever and be provided with a spring in a transverse plane vertical extent of carriage release lever;

In addition, also can form a contact on the above-mentioned conducting strip, to contact with the contact of bimetal leaf; The contact of catch and bimetal leaf can be positioned at the same side simultaneously.

Advantage of the present utility model and good effect are very obvious; by above technical scheme as can be known; the utility model integrates and connects power supply and electric prospection; simple in structure, cost is low, volume is little; it substantially only relies on a bimetal leaf; just can cut off the electricity supply automatically when receiving bigger burst current, play the effect of protection electrical equipment, effect such as this instrument to the protective price costliness, computer is more remarkable.

Further specify specific structural features of the present utility model and purpose below in conjunction with accompanying drawing:

Brief Description Of Drawings:

Fig. 1 is an element exploded perspective view of the present utility model.

Fig. 2 is the vertical view of the utility model elements combination.

Fig. 3 is the vertical view of the utility model operation embodiment.

Fig. 4 is the main cutaway view of the utility model operation embodiment.

Fig. 5 is the schematic diagram of plug commonly used.

Please referring to element three-dimensional exploded view of the present utility model shown in Figure 1, by seeing among the figure, plug 10 is made up of bottom 11 and loam cake (not shown), outer side edges in a longer sides of bottom 11 is provided with a perforate 112, be provided with a wire hole 114 in one than minor face, two plug-in sheets 12 are set on bottom 11 in addition, 13, in plug-in sheet 12, a distolateral inserted sheet 122 that respectively extends vertically downward of 13,132, in plug-in

sheet

12,13 central appropriate positions are provided with a fixing hole 124,134, can make plug-in sheet 12 by

screw

30,13 are fixed in the screwing togather on the post 118 of bottom 11, in addition on bottom 11 with respect to inserted sheet 122,132 position is provided with two perforation 116, can make inserted sheet 122,132 by passing in the perforation 116, be provided with two columns 119 again in the appropriate location of bottom 11, can supply bottom 11 and loam cake the fashionable screw that is used for; The other end in plug-in sheet 13 is provided with a wiring hole 136, the other end in plug-in sheet 12 is formed with a connecting piece 126, on brace 126, wear a connecting hole 128, its connecting hole 128 is connected with the made bimetal leaf 14 of a gim peg 144 and pair of lamina metal, the other end in bimetal leaf 14 then forms contact 142,142 below is provided with a conducting strip 16 in the contact, conducting strip 16 is to be fixed on the bottom 11, end in conducting strip 16 also is formed with a contact 162, contact 142 bottom connections of itself and bimetal leaf 14 touch, and then are provided with a wiring hole 164 in the other end of conducting strip 16.

Again, be provided with the carriage release lever 20 that an insulating material is made in the below of bimetal leaf 14, its length may extend to the outside of bottom 11, and in a side plane vertical extent one catch 22 of carriage release lever 20 in the contact 142 of bimetal leaf 14, an end that has catch 22 in carriage release lever 20 is provided with a spring 24 in addition.

Shown in Figure 2 is the vertical view of the utility model combination, by seeing among the figure, plug-in sheet the 12, the 13rd is fixed on the bottom 11 with screw 30, wiring hole 136 on the plug-in sheet 13 is connected with a utmost point of an electric wire 40, wiring hole 164 on conducting strip 16 also is connected with another utmost point of electric wire 40 in addition, and electric wire 40 is then by passing in the wire hole on the bottom 11 114; Again, carriage release lever 20 does not have an end of catch 22 by passing in the perforate on the bottom 11 112, and carriage release lever 20 is the belows that place bimetal leaf 14, and its end with catch 22 then contacts with spring 24, the other end of spring 24 then is placed in the side of bottom 11, and the other end of carriage release lever 20 then passes the perforate 112 of bottom 11; This moment, catch 22 was to be positioned at the contact 142 of bimetal leaf 14 and the outside of conducting strip 16 contacts 162 contact points, and plug 10 then is channel status.

Shown in Figure 3 is the vertical view of the utility model operation embodiment; by seeing among the figure; when plug 10 receives the electric current of an increase suddenly; because of bimetal leaf 14 is that double-level-metal is made; when electric current big and produce when hot; can be because of the thermal coefficient of expansion difference of double layer of metal; and contact 142 can upwards be lifted; itself and contact 162 on the conducting strip 16 are separated; this moment, spring 24 meetings promoted carriage release lever 20, and its catch 22 is moved between bimetal leaf 14 contacts 142 and the conducting strip 16, because of catch 22 is an insulation material; therefore can make plug 10 be off state, so the electrical equipment that can protect plug 10 to be connected is not subjected to the damage of erratic current.

Please be simultaneously referring to Fig. 4, this is the main cutaway view of the utility model operation embodiment, by being more clearly visible among the figure, when plug 10 receives bigger burst current, the contact 142 of bimetal leaf 14 can upwards be lifted, and catch 22 is placed between bimetal leaf 14 contacts 142 and conducting strip 16 upper contacts 162, and make plug 10 be off state.

And as need make plug 10 recover energising the time, then only need carriage release lever 20 is pushed downwards, catch 22 is removed from

bimetal leaf

14 and 16 of conducting strips, the contact 142 of bimetal leaf 14 is contacted with the contact 162 of conducting strip 16 again, just can make plug 10 recover channel status.

The utility model can rely on a bimetal leaf 14, make plug 10 when receiving bigger burst current, bimetal leaf 14 contacts 142 and contact 162 on the conducting strip 16 are separated, promote a carriage release lever 20 via spring again, make its catch 22 move to 16 of bimetal leaf 14 and conducting strips, and make plug 10 be off-position, use the damage that the electrical equipment of protecting plug 10 to be connected is not subjected to the electric current shakiness; In addition, can directly on plug 10, directly install a safety device, not need to install separately other expensive safety devices, can reduce user's burden economically.

Claims

1. safety plug is provided with two plug-in sheets between the bottom of plug and loam cake, a utmost point of electric wire is to be connected on the plug-in sheet, it is characterized in that:

End in another plug-in sheet is formed with a connecting piece, on brace, be fixed with the made bimetal leaf of pair of lamina metal, end in bimetal leaf then forms a contact, its below contacts with a conducting strip, and conducting strip is to be fixed on the bottom, and an end of conducting strip is equipped with a wiring hole, to be connected with another utmost point of electric wire; Again, be provided with the carriage release lever of an insulation material in bimetal leaf below, be formed with a catch, have between end of catch and bottom sidewall in carriage release lever and be provided with a spring in a transverse plane vertical extent of carriage release lever.

2. safety plug according to claim 1 is characterized in that: wherein be formed with a contact on the conducting strip, conducting strip contacts with the contact of bimetal leaf with the contact.

3. safety plug according to claim 1 is characterized in that: wherein the contact of catch and bimetal leaf is to be positioned at the same side.