CN2309657Y - Sheet circuit breaker - Google Patents

Abstract

The utility model relates to a protection device for an electronic circuit, particularly an overload circuit breaker of a motor vehicle circuit. The utility model aims to solve the problem that the closed circuit can not automatically recover after the circuit is broken due to the current overload existing in the existing circuit breaker. The breaker comprises an insulating casing 1, two electrode connecting and inserting pieces 2, 3 connected with the casing, and a sheet-like polymerizing switch 6 electrically connected with the electrode connecting and inserting pieces 2, 3. The polymerizing switch 6 is provided with a bare heat radiation portion 9. The casing presents a cylindrical shape, and the shape presents an insert structure matched with a socket of the breaker; the casing is sheathed on the connection portion of the electrode connecting and inserting piece and the polymerizing switch. The breaker is used as the circuit protection of the automobile and the motorcycle.

Description

Sheet shape self-recovering type circuit breaker

The utility model relates to the release of the protective device of electronic circuit, particularly motor circuit.

Along with the development of automobile, motorcycle industry, require vehicle to develop to operating flexibility, safety in utilization, operational feasibility, servicing ease, driving comfort direction.The development of automotive electronics and electronic product has become weighs the beautiful of auto industry level and car mass class.The cost of its electronic product has reached more than 20% of integral vehicle cost in the at present external car.It is predicted that China will accelerate the development of auto electronics industry, to adapt to the needs of automobile industry development, the cost of automobile electronics will progressively reach the 10-20% that accounts for the car total cost.This just has higher requirement to the protection of automobile circuit, and common disposable insurance is difficult to satisfy this demand for development.

The circuit-breakers of present a large amount of uses on automobile, motorcycle, be disposable fuse, the structure of disposable fuse, be between two metal insert-connecting plates, to connect a very thin meltability wire, be commonly referred to fuse,, play the usefulness of insulation and stable metal inserted sheet at its outer cover envelope plastic casing, shell is exposed in the metal insert lower portion, so that peg graft with the electrode in the fuse sockets.Its operating principle is: when having served as live stream and flowing through wire, make wire heating fusing, its course of action is a physical process.This fuse fuses when circuit is short-circuited or transship.This blown fuse cannot recover later on, must change.This brings great inconvenience for driver and maintenance personal, and the reliability of vehicle operating is low.Sometimes when not having suitable fuse just to change, driver who has or maintainer adopt the way reparation of the common direct short circuit of plain conductor in order to follow the line of least resistance, and will stay the hidden danger of major accident like this, bring bigger loss.The lighter damages vehicle part, serious plays the baked wheaten cake car because of short circuit.

Given this, the purpose of this utility model be to provide a kind of at current overload to after opening circuit, can recover the circuit breaker of path voluntarily.

The utility model adopts to patch at two electrodes and connects polymeric switch between sheet and realize its purpose.

Of the present utility model shape self-recovering type circuit breaker (referring to accompanying drawing), comprise the housing (1) of insulation, two electrodes that link to each other with housing patch sheet (2,3), have with two electrodes and patch the polymeric switch (6) that sheet is electrically connected shape, above-mentioned housing is tubular, its profile is the dongle configuration that matches with the circuit breaker socket, be sleeved on electrode and patch the connection part of sheet and polymeric switch, there is the radiating part (9) of the polymeric switch that is exposed shape in the outside of housing one end.

Above-mentioned polymeric switch can have two to patch the electrode inserted link (7,8) that the socket (4) of sheet matches separately with two electrodes respectively.

Above-mentioned polymeric switch is a semistor.

The outboard end that above-mentioned electrode patches sheet can have lock hole (5).

Operating principle of the present utility model is: because polymeric switch (PolySwitch) is semistor (PTC); when having served as live stream and having flow through polymeric switch; its inner heat; macromolecular material generation microcosmic expands; make the disconnected row of molecule chain link of its inner conducting medium, polymeric switch resistance suddenly increases, and presents high-impedance state; stop overload current to pass through, reach the purpose of protective circuit.Have only after fault is got rid of, the polymeric switch heat radiation reduces temperature, and the molecule chain link of conducting medium reconnects, and polymeric switch returns to low resistive state again, and circuit just can recover conducting.This shows that the course of action of this film shape self-recovering type circuit breaker is a kind of chemical process.

Said structure of the present utility model makes it have following advantage and effect.

One, uses the utility model, particularly use the utility model on the motor vehicle such as automobile, motorcycle, when circuit is short-circuited or during overload fault, can opens circuit and protective circuit immediately.And after fault is got rid of, in the extremely short time, can recover path automatically, must not change.Improve the reliability and the fail safe of motor circuit, improved the quality quality of car load simultaneously.Also bring convenience, effectively avoid taking place, reduce the vehicle use cost greatly because of all kinds of driving accidents that fault causes to driver and maintenance personal.

Two, the insulation shell with plug-in unit contour structures of the present utility model had both played the usefulness that insulation and stabilized electrodes patch sheet, worked the usefulness that supports polymeric switch simultaneously again.The slab organization of polymeric switch makes the surface area of its unit volume bigger, and promptly the cooling surface area that contacts with air is bigger, the radiating part structure that it is exposed, also be convenient to the heat radiation of polymeric switch, make it after fault is got rid of, in extremely short time such as tens of second, can recover path automatically.

Three, the electrode inserted link of polymeric switch of the present utility model and electrode patch the structure that the socket of sheet matches, and make things convenient for the assembling of the two, the good manufacturability of its assembling.

Four, electrode of the present utility model patches the exposed Plug Division structure of sheet, so that plug with electrode in the circuit breaker socket.Also be convenient to match, have interchangeability, make it can not only be used for newly-designed circuit structure, also can on existing In-Use Motor Vehicles, directly replace original disposable fuse with existing automobile, motorcycle circuit structure.Electrode patches the lock hole structure of the outboard end of sheet, can match with the stop pin in the circuit breaker socket, and the salient point of stop pin is snapped in the lock hole, prevents to peg graft to come off.

Below, the utility model is further described to use embodiment and accompanying drawing thereof again.

Brief description of drawings.

Fig. 1 is the structural representation of a kind of shape self-recovering type circuit breaker of the present utility model.

Fig. 2 is the left cutaway view of Fig. 1.

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

Embodiment 1

A kind of shape self-recovering type circuit breaker of the present utility model, as shown in drawings.By housing, two electrodes patch sheet, polymeric switch constitutes.

Above-mentioned housing 1 is made with common insulating material, is similar rectangular cylindrical shell, and profile is the dongle configuration that matches with common circuit breaker socket (not shown).

Above-mentioned two electrodes patch sheet 2,3, and with the metal material manufacturing of common good conductivity, being an end has socket 4, the other end that the long square shape sheet of circular lock hole 5 is arranged.Two electrodes patch sheet 2,3, will have an end of socket 4 to be inlaid in the housing and link to each other with housing, become the Plug Division and there is an end of lock hole 5 to expose outside housing.

Above-mentioned polymeric switch 6, the semistor that adopts common macromolecular material to make is long square shape sheet, and the two sides of polymeric switch respectively have one to plug the electrode inserted link 7,8 that cooperates separately with the socket 4 that two electrodes patch sheet 2,3 respectively.Polymeric switch has an end of electrode inserted link 7,8 to be inlaid in the housing and links to each other with housing, and the other end exposes the radiating part 9 that becomes polymeric switch in the outside of housing one end.Thereby, constitute housing and be sleeved on the structure that electrode patches the connection part of sheet and polymeric switch.

This film shape self-recovering type circuit breaker is mainly as the circuit protection of automobile, motorcycle.

Claims (4)

1, sheet shape self-recovering type circuit breaker, comprise the housing (1) of insulation, two electrodes that link to each other with housing patch sheet (2,3), it is characterized in that having with two electrodes and patch the polymeric switch (6) that sheet is electrically connected shape, above-mentioned housing is tubular, its profile is the dongle configuration that matches with the circuit breaker socket, be sleeved on electrode and patch the connection part of sheet and polymeric switch, there is the radiating part (9) of the polymeric switch that is exposed shape in the outside of housing one end.

2, as claimed in claim 1 shape self-recovering type circuit breaker is characterized in that said polymeric switch has two to patch the electrode inserted link (7,8) that the socket (4) of sheet matches separately with two electrodes respectively.

3, as claimed in claim 1 or 2 shape self-recovering type circuit breaker is characterized in that said polymeric switch is a semistor.

4, as claimed in claim 3 shape self-recovering type circuit breaker is characterized in that the outboard end that said electrode patches sheet has lock hole (5).

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