CN212303597U

CN212303597U - Circuit breaker

Info

Publication number: CN212303597U
Application number: CN202021392307.8U
Authority: CN
Inventors: 杨延航
Original assignee: Shenzhen Yulong Hongtian Technology Co ltd
Current assignee: Shenzhen Yulong Hongtian Technology Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-01-05
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a circuit breaker, include: the resistance device and the deformation device are arranged between the arm end and the base end, and the arm end is movably connected with the base end. The utility model provides a circuit breaker detects the temperature under the abnormal conditions and surpasss the management and control temperature, and the circuit is cut off at once, and up to the temperature recovery to safe temperature, automatic recovery when confirming for the safe state, in case confirm safety, just can reuse.

Description

Circuit breaker

Technical Field

The utility model relates to a data transmission technical field, in particular to circuit breaker.

Background

The conventional data line is internally provided with a TYPE C module, and the overheat and overcurrent protection generally adopts the following mode, namely, the mode 1) is that a polymer self-recovery TYPE PTC is connected in series on a VBUS circuit, the heat is generated due to the rise of temperature or the overlarge current, the PTC internal resistance is increased, and the circuit is cut off; however, the circuit is not disconnected in time, generally 0.2 second or several seconds, and the danger of overcurrent is often not timely, so that the circuit is burnt out or a fire is caused, and the protection purpose cannot be achieved; and after the circuit is cut off due to overcurrent or overheat of the PTC, the heat dissipation temperature gradually drops, and once the heat dissipation temperature is lower than the connection point, the PTC can immediately recover to connect the line. Mode 2) is to use the NTC to sense the temperature change, trigger the control chip, and cut off the power supply by controlling the MOS transistor. However, the reaction speed is not timely enough, if the circuit is not powered, the NTC, the control chip and the MOS tube do not work, once the circuit is powered on, if the circuit has a fault, the current is directly added to the faulty circuit, and the problem of circuit fault is aggravated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a circuit breaker solves the technical problem that the reaction rate of breaking is insensitive, untimely and the security performance is low. Through the PTC (thermistor) and the bimetallic strip structure, when the ambient temperature rises to a certain degree, even when no current passes, the circuit can be automatically disconnected physically by utilizing the characteristics of the bimetallic strip, the PTC in contact with the bimetallic strip can generate heat under the action of weak current, the bimetallic strip is kept in a disconnected state, and the bimetallic strip is recovered to be connected until the line fault is eliminated. The bimetallic strip is in physical contact, so that the value of a passing circuit is large; when the switch is in the off state, the safety performance is high due to the fact that the switch is physically disconnected.

In order to achieve the above object, the present invention provides the following technical solutions:

a circuit breaker, comprising: arm end 6, resistance device 9, deformation device 8 and base end 1, resistance device 9 with deformation device 8 all sets up arm end 6 with between the base end 1, arm end 6 with base end 1 swing joint.

Preferably, the resistance device 9 is a ceramic PTC, and the deformation device 8 is a bimetallic strip.

Preferably, the arm end 6 is movably connected with the base end 1 through a contact 2.

Preferably, the resistance device 9 is arranged below the deformation device 8.

Preferably, the resistance device 9 is arranged above the deformation device 8.

Preferably, the arm end 6 and the base end 1 are both copper alloy.

Preferably, the device further comprises a housing, wherein the housing comprises an upper cover 4 and a base 7, and the upper cover 4 is provided with a metal device 5.

Through implementing above technical scheme, have following technological effect: the utility model provides a circuit breaker detects the temperature under the abnormal conditions and surpasss the management and control temperature, and the circuit is cut off at once, and about the temperature recovered the safe temperature, safe temperature need nimble adjustment according to circuit itself, automatic recovery when confirming for the safe state, in case confirm safety, just can reuse. When the temperature rises to the protection temperature, the miniature circuit breaker can be started instantly, and the resistance rises to play a role in protection; when the temperature drops to the recovery temperature, the miniature circuit breaker can be quickly recovered to a normal working state, the response is quick, and the safety performance is high.

Drawings

Fig. 1 is a schematic structural diagram of a circuit breaker provided by the present invention in a normal operating state;

fig. 2 is the schematic structural diagram of the circuit breaker in the protection state provided by the present invention.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed description of the embodiments provided in the present invention is provided with reference to the accompanying drawings.

A circuit breaker, as shown in fig. 1, comprising: arm end 6, resistance device 9, deformation device 8 and base end 1, resistance device 9 with deformation device 8 all sets up arm end 6 with between the base end 1, arm end 6 with base end 1 swing joint. As shown in fig. 2, when the ambient temperature exceeds the control temperature or when the ambient temperature exceeds the control temperature due to heat generation by the current, the strain gauge 8 is warped to lift the arm end 6, so that the arm end 6 and the base end 1 are disconnected from each other, and the current is turned Off (Off state).

At this time, the current flows into the resistance device 9, and the resistance of the resistance device through which the current passes is about ten or more ohms, so that the current flowing through the resistance device is very weak. The weak current can enable the resistance device to be in a micro-heating state, so that the state that the deformation device is warped to break the circuit is maintained. The circuit remains open until the ambient temperature drops.

On the basis of the above embodiment, in other embodiments, further, the resistance device 9 is a ceramic PTC, and the deformation device 8 is a bimetal. In this embodiment, preferably, the arm end 6 is movably connected with the base end 1 through a contact 2. The arm end 6 and the base end 1 are both made of copper alloy. Both ends are made of copper alloy material with low impedance, so the impedance in the electrified state can be controlled within a few milli-ohms (m omega). Due to the difference of the temperature expansion coefficients of the two metals of the bimetallic strip, when the temperature is controlled by the ambient temperature and the heat generated by current, the upper surface and the lower surface of the bimetallic strip are bent to different degrees, so that the bimetallic strip is buckled and bounced, and the technical effect of separating the arm end 6 from the base end 1 is achieved.

On the basis of the above embodiment, in other embodiments, further, the resistance device 9 is disposed below the deformation device 8. In other embodiments, the resistance means 9 are arranged above the deformation means 8. The shell is made of insulating materials and comprises an upper cover 4 and a base 7, and a metal device 5 is arranged on the upper cover 4. The metal device 5 can resist the external pressure of the shell, and the technical effect of protecting the internal structure of the circuit breaking device is achieved.

The above is to the detailed introduction of the circuit breaker that the embodiment of the present invention provided, to the general technical personnel in this field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and application scope, to sum up, this description content should not be understood as right the utility model discloses a restriction.

Claims

1. A circuit breaker, comprising: arm end (6), resistance device (9), deformation device (8) and base end (1), resistance device (9) with deformation device (8) all set up arm end (6) with between base end (1), arm end (6) with base end (1) swing joint.

2. Circuit breaker according to claim 1, characterized in that said resistive means (9) are ceramic PTC and said deformation means (8) are bimetallic strips.

3. The circuit breaker according to claim 1, characterized in that said arm end (6) is movably connected with said base end (1) by means of a contact (2).

4. The circuit breaker according to claim 1, characterized in that said resistance means (9) are arranged below said deformation means (8).

5. The circuit breaker according to claim 1, characterized in that said resistance means (9) are arranged above said deformation means (8).

6. The circuit breaker according to claim 1, characterized in that said arm end (6) and said base end (1) are both of copper alloy.

7. The circuit breaker according to claim 1, characterized in that it further comprises a housing comprising an upper cover (4) and a base (7), said upper cover (4) being provided with a metal means (5).