Plug

Abstract

The invention provides a plug, comprising a shell body (1), terminals (2, 3, 4) extending into the shell body, and electric output wires (5, 6, 7). The invention has the characteristics that the shell body is also provided with a temperature and electric current protector (100), wherein the temperature and electric current protector (100) comprises a bimetallic strip (40) and a thermal resistor (50) which is arranged in parallel at the two ends of the bimetallic strip (40); the temperature and electric current protector is arranged in series between the live wire terminal and the live wire ofthe electric output wire. The invention is capable of preventing the automatic resetting of the bimetallic strip after breaking off to shut off the circuit, which enhances the safety of the use, as the electric supply of the plug needs to be cut off and the power supply needs to be connected to reset the power source after the temperature falls. Therefore, the safety is enhanced; and the plug is more sensitive to the protection of overcurrent.

Description

technical field [0001] The invention relates to a power plug, in particular to a power plug with temperature protection function. Background technique [0002] The traditional power plug includes the plug shell, the terminals extending into the shell, and the power output line. The plug itself has no temperature and current protection function. These reasons cause heat generation or excessive current in the circuit, thereby burning out electrical equipment or even causing a fire accident. When the ambient temperature rises and overheats, such a plug cannot automatically disconnect the power supply and cannot provide protection. [0003] In order to prevent overheating damage, a temperature protection plug has appeared in the prior art, which is a plug with a bimetallic strip. When the plug is overheated, the dynamic and static contacts of the bimetallic strip jump away, causing the power to be cut off in the plug, and related electrical equipment power outage without damage...

AI Technical Summary

Problems solved by technology

If it is disconnected due to overheating of the circuit or the plug, the circuit and the plug will no longer heat up, and the temperature will drop. After reaching the normal range, the bimetal will be closed again, the power in the plug will be turned on again, and the electrical equipment of the load will be powered on again. Damage to electrical equipment, and if the user does not leave the electrical equipment while troubleshooting or other reasons, the sudden reset of the circuit may cause personal accidents to the user

It can be seen that the temperature protection plug with a bimetallic sheet can play a role in overheating protection, but there are potential safety hazards

In addition, the protection of bimetal strips is not sensitive enough to the situation of excessive current in the circuit

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