CN2143016Y

CN2143016Y - Multi-function fuse box

Info

Publication number: CN2143016Y
Application number: CN 93200382
Authority: CN
Inventors: 杨季民
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-14
Filing date: 1993-01-14
Publication date: 1993-09-29
Anticipated expiration: 2003-01-14

Abstract

The utility model provides a novel multi-function fuse box, which is provided with two forms of a plug-in structure and a safe structure. The plug-in structure is composed of a socket and a plug. A fuse tube and an over voltage protection element are installed on the plug, when the power supply and the power use are not normal, (over current and over voltage), the fuse box can timely fuse the fuse to cut off the circuit and protect an electric appliance. The safe structure is that a fuse tube and a voltage protection element are connected with a knife fuse, and the safe structure is used for the rebuilding of the present knife fuse. The utility model has the function of over current and over voltage protection, the replacement of the fuse is convenient, and the utility model is used for the power use fuse of AC/DC users, such as residential buildings, offices, etc.

Description

Multi-function fuse box

The utility model has related to the security personnel's device in a kind of electrical field, and specifically a kind of multi-functional safety box is specially adapted to the security insurance of residential building electricity consumption power supply, also can be used for enterprise, the power safety of unit.

The safety box that existing resident resident family and general power consumption equipment use mostly is the guillotine type insurance, leave behind by closing of a plug-in strip and to be switched on or switched off power supply, though this safety box usefulness is comparatively general, structure is clumsy, style is outmoded, the waste copper material, and is also inconvenient when changing insurance.In order to upgrade this outmoded guillotine type insurance, the patent No. 88.215673.Release a kind of simple in structure, have attractive appearance, easy to use, can carry out the multi-functional safety box of overcurrent, overvoltage protection to indoor all electrical appliances, be subjected to the user and welcome.But the employed over-voltage protection element of this safety box is a Zinc-oxide piezoresistor.In case can not recover its primary characteristic after the Zinc-oxide piezoresistor high-voltage breakdown conducting, need change the function that element could recover safety box again.And the Zinc-oxide piezoresistor volt-ampere characteristic is not steep causes misoperation easily.The Zinc-oxide piezoresistor through-current capacity is little in addition, and price is expensive.Directly influenced popularizing, promote and using of multi-functional safety box.

Be to release order of the present utility model a kind of simple in structure, have attractive appearance, cheap, need not change over-voltage protection element, easy to use, can carry out the multi-functional safety box of overcurrent, overvoltage protection to indoor all electrical equipment.Design of the present utility model is by being contained in an electric current protective tube, a bidirectional triode thyristor, a resistor group on the plug-in type safety box and realizing.

The utility model can be made inserter structure, also can make a multifunctional protecting box and be fitted on the existing guillotine type safety box.Inserter structure is mainly used in the update of guillotine type safety box, form by plug, socket two parts, four jacks of two rows are arranged on socket, two jacks of last row connect power line, two jacks of following row connect load line in order to prevent that with power end and load end wrong, the pitch-row of two supply hubs and two load jacks does not wait.Plug is similar with existing attaching plug external form; there are four not equidistant pins of two rows in the plug front; the top is two power end pins; bottom is two load end pins; series connection is connected to an electric current protective tube between the load pin of each power pin of plug inside and correspondence; in order to energized and overcurrent insurance, between two load pins, be parallel with the over-voltage protection element that bidirectional triode thyristor and resistance are formed.Receive respectively on the gate pole and anode of bidirectional triode thyristor at the two ends of resistance.When supply voltage just often by the very for a short time trigger current value that do not reach of the trigger current of resistance, bidirectional triode thyristor is off state, the power supply circuits operate as normal.When supply voltage raise for some reason and reach the voltage protection value, trigger current reached setting, and the bidirectional triode thyristor conducting forms short circuit, and short circuit current fusing overcurrent protective tube is cut off the electricity supply and protected electrical appliance.The optional as required 2A of overcurrent fuse in the utility model, different amperage such as 5A, 10A, the bidirectional triode thyristor through-current capacity is greater than 2 times of electric current value of risk.The resistance of resistance can determine different protection voltage, as exchanges 250 volts, 24 volts of direct currents etc.

The utility model can be developed into the alternating current-direct current series of products with different overcurrent protection values and different overvoltage protection values, and the plug of safety box, socket can be used insulating material manufacturings such as bakelite, plastics.Security personnel's box structure is mainly used in existing guillotine type safety box is transformed, and specific practice is that insurance and the protective cover with original guillotine type safety box Lower Half removes, and replaces with security personnel's box that contains above-mentioned overcurrent, over-voltage protection element.Security personnel's box can be made a square flat box, protective tube, bidirectional triode thyristor, resistance etc. correctly are fastened in the box, security personnel's box is up and down respectively drawn two lead-in wires in two ends, and the lead-in wire of the box of will ensure public security during use is corresponding respectively to be attached on four terminal screws that former guillotine type insures and to get final product.

Characteristics of the present utility model are can realize overcurrent, over-voltage protecting function with a safety box.And after overvoltage protection occurring, needn't change the overvoltage element.Simple in structure, cheap, saving copper material, easy to install, thereby can extensively replace old-fashioned guillotine type safety box.

Embodiment of the present utility model is provided by following accompanying drawing:

Embodiment 1:

Embodiment 1 is used for replacing fully the guillotine type safety box.

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

Fig. 2 is a structural representation of the present utility model.

Fig. 2 a is the plug interior structure schematic diagram.

Fig. 2 b is the end view of plug.

Fig. 2 c is the internal structure schematic diagram of socket.

Fig. 2 d is the outline drawing of socket.

As Fig. 1, socket (1), plug (2), two protective tubes (3), through plug, socket be serially connected in supply terminals and load wiring end between, two anodes of bidirectional triode thyristor (4) are connected in parallel between two load ends of plug inside, gate pole is connected on load one end by resistance (5).

Shown in figure (2), (6) are the power end pin of plug, and (7) are the load end pin of plug, and (8) are the insulator of plug.Protective tube (3) is contained on the chuck reed (9) and (10) that power pin and load pin do not hold, and two anodes of bidirectional triode thyristor (4) are connected on the brace (10) that two load end pins (7) do not hold.The gate pole of one termination bidirectional triode thyristor (4) of resistance (5), the other end are connected on the brace (10) that the load pin do not hold.(11) be the insulating base of socket; (12) be socket power end Spring clip; (13) be socket load end Spring clip, circuit is connected, the power supply normal power supply; when supply voltage raises trigger current by resistance (5) when reaching the trigger current value for some reason; bidirectional triode thyristor (4) conducting causes short circuit, protective tube (3) fusing; cut off circuit, protected electrical appliance.

Embodiment 2:

Embodiment 2 is used to transform the guillotine type insurance.

Fig. 3 is a structural representation of the present utility model.Be security personnel's boxes as figure (14), (9), (10) are the fixing reed clamp of protective tube, and (3) are protective tube, and (4) are bidirectional triode thyristor, and (5) are resistance.

Claims

A kind of plug-in type safety box and guillotine type security personnel box that contains overcurrent protection; it is characterized in that on the plug of this plug-in type safety box an over-voltage protection element of being made up of bidirectional triode thyristor (4) and resistance (5) being housed also; the protective tube (3) of guillotine type security personnel box is assembled in security personnel's boxes (14) by a bidirectional triode thyristor (4), a resistance (5).