CN202210672U

CN202210672U - Circuit protector

Info

Publication number: CN202210672U
Application number: CN2011203494842U
Authority: CN
Inventors: 周云福
Original assignee: BrightKing Shenzhen Co Ltd
Current assignee: BrightKing Shenzhen Co Ltd
Priority date: 2011-09-19
Filing date: 2011-09-19
Publication date: 2012-05-02
Anticipated expiration: 2021-09-19

Abstract

A circuit protector comprises a first protection unit and a second protection unit which are connected with each other, wherein the first protection unit is connected in parallel with the circuit and adopts a short-circuit or low-resistance failure mode, whereas, the second protection unit adopts an open-circuit or high-resistance failure mode; and the other end of the first protection unit is the first pin of the circuit protector, and the other end of the second protection unit is the second pin of the circuit protector. The circuit protector avoids the ignition, burning or explosion and other failure problems caused by the short-circuit or low-resistance failure, allows the circuit to be in a high-resistance or open-circuit state, and can serve an alarm indicating function for reminding of replacing the protector to some extent.

Description

A kind of circuit brake

Technical field

The utility model relates to the device that circuit is protected, and other reason causes having in the circuit the harmful protection devices of possibility render electrical path loss such as surge owing to being struck by lightning perhaps in particularly a kind of circuit.

Background technology

It all is to be parallel in the circuit that resistor that traditional over-voltage protector changes like metal zinc oxide piezo-resistance/non-line or silicon snowslide diode or crystalline substance are explained body TVS or the discharge tube (MOV/VARISTOR/TVS DIODE/ABD/HYPERFIX) etc.; Surge is absorbed; Circuit is protected, but unavoidable because extraneous energy is excessive or there is constantly aging decay in element self, and lose original electricity function index; Become and cause existing the phenomenon generation of the problem of inefficacy; But these component failure patterns generally can exist for short circuit or low resistive state, can have influence on the operate as normal of product circuit unavoidably, even can be because the fault that is occurred can be guided to the whole fail safe of product; Like phenomenons such as fire burns, blasts, thereby have influence on human personal property and life security.

In order to remedy the existing inefficacy in the surge protection process of single over-voltage protection element or material is the potential safety hazard that short circuit or low resistive state are brought; When we must or select protection component for use at the design circuit protection scheme, must consider corresponding electronic component or material existing failure mode and the influence of the unfavorable factor that caused in circuit design.Therefore be important for a kind of such protective device of design is excellent on existing rank, to become the eager key issue that solves of each surge protection industry field.

Summary of the invention

Because inefficacy own possibly cause dangerous deficiency, the utility model provides a kind of protector to behind the protection component failure circuit being continued to protect in order to overcome present circuit brake.

The technical scheme that the utility model goal of the invention adopts is: a kind of circuit brake; Comprise that the failure mode that is parallel in the circuit is short circuit or is first protected location of low-resistance; Comprise that also failure mode is open circuit or is second protected location of high resistant; Described first protected location is connected with second protected location, and the other end of described first protected location is first pin of this circuit brake, and the other end of described second protected location is second pin of this circuit brake.

Further, in above-mentioned a kind of circuit brake: described first protected location is that resistor that the metal zinc oxide piezo-resistance/non-line changes or silicon snowslide diode or crystalline substance are explained body TVS or discharge tube.

Further, in above-mentioned a kind of circuit brake: described second protected location is fuse or thermistor or metal fuse.

Further, in above-mentioned a kind of circuit brake: described first protected location adopts electric conducting material to be connected with second protected location, connects described first protected location and second protected location the 3rd pin for this circuit brake.

Further, in above-mentioned a kind of circuit brake: also comprise the state display lamp that shows this protector state, described state display lamp is the LED lamp that is connected between first pin and the 3rd pin.

Further, in above-mentioned a kind of circuit brake: also comprise the LED protective resistance of connecting with the LED lamp.

The utility model design protection device has avoided losing efficacy because the failure problems such as right burning or blast of catching fire that short circuit or low resistive state cause; And let circuit continue to maintain high resistant or open-circuit condition; And also can design to a certain extent from having the warning directive function; Inform the replacing protective device, below be elaborated as follows.

Below in conjunction with accompanying drawing the utility model is described in detail.

Description of drawings

Accompanying drawing 1 is the utility model embodiment 1 structural representation.

Accompanying drawing 2 is that the utility model embodiment 1 uses sketch map.

Accompanying drawing 3 is the utility model embodiment 2 structural representations.

Accompanying drawing 4 is that the utility model embodiment 2 uses sketch map.

Accompanying drawing 5 is that the utility model embodiment 3 uses sketch map.

Accompanying drawing 6 is that the utility model embodiment 3 uses sketch map.

Among the figure: 1, first pin, 2, second pin, the 3, the 3rd pin, 4, first protected location, 5, second protected location.

Embodiment

Embodiment 1 is as shown in Figure 1; Present embodiment is a kind of a kind of circuit brake that is parallel in the protected circuit; Structure is as shown in the figure; Adopt first protected location 4 of MOV or TVS or HYPERFIX or VARISTOR or ABD or TSS to be connected, have only two to be pin first pin 1 and second pin 2 with second protected location 5 that uses fuse or thermistor or metal fuse.As shown in Figure 2 is this protector user mode circuit theory diagrams, and as finding out among the figure, the device of the device of first protected location 4 such as MOV and second protected location 5 such as fuse series connection back are parallel in the protected circuit through first pin 1 and second pin 2.When extraneous overvoltage surge energy too big; When making first protected location, 4 devices such as MOV resistance even short circuit; The electric current of protection branch road will strengthen, and second protected location, 5 devices such as fuse are fused or be high resistant here, this protective circuit are in time protected to avoid danger.

Embodiment 2 is as shown in Figure 3, and the difference of present embodiment and embodiment 1 is that one the 3rd pin 3 is arranged, and through introducing the 3rd pin 3 the multiple method that connects can be arranged, and as shown in Figure 4 is exactly a kind of circuit theory diagrams to being protected by protective circuit.At first will connect with device such as fuse then in the circuit brake of this embodiment as the device of first protected location 4 such as MOV with parallelly connected by protective circuit as second protected location 5.When extraneous surge voltage energy is too big, in the time of can making first protected location 4 like MOV resistance even short circuit, protect the electric current of branch road to strengthen, fuse is fused here, this protection outlet is in time protected to avoid danger.

Embodiment 3 is like Fig. 5, shown in 6; This embodiment compares with the 2nd embodiment with the 1st, has increased indicator light exactly, is in normal guard mode through bright can the indicating as the protection device of first protected location 4 such as MOV etc. of indicator light; When MOV damages; When resistance even short circuit, the voltage in the parallel circuits reduces, and indicator light will extinguish.

Claims

1. circuit brake; Comprise that the failure mode that is parallel in the circuit is short circuit or is first protected location of low-resistance; It is characterized in that: comprise that also failure mode is open circuit or is second protected location (5) of high resistant; Described first protected location (4) is connected with second protected location (5), and the other end of described first protected location (4) is first pin (1) of this circuit brake, and the other end of described second protected location (5) is second pin (2) of this circuit brake.

2. a kind of circuit brake according to claim 1 is characterized in that: described first protected location (4) is that the resistor that changes of metal zinc oxide piezo-resistance/non-line or silicon snowslide diode or crystalline substance are explained body TVS or discharge tube.

3. a kind of circuit brake according to claim 1 is characterized in that: described second protected location (5) is fuse or thermistor or metal fuse.

4. a kind of circuit brake according to claim 1; It is characterized in that: described first protected location (4) adopts electric conducting material to be connected with second protected location (5), connects described first protected location (4) and is the 3rd pin (3) of this circuit brake with second protected location (5).

5. a kind of circuit brake according to claim 4 is characterized in that: also comprise the state display lamp that shows this protector state, described state display lamp is for being connected to the LED lamp between first pin (1) and the 3rd pin (3).

6. a kind of circuit brake according to claim 5 is characterized in that: also comprise the LED protective resistance of connecting with the LED lamp.