Apparatus for circuit break while door closing

Abstract

The invention discloses a door-locking power-off device, which comprises a normally closed electromagnetic relay, wherein a normally closed contact of the normally closed electromagnetic relay is connected in series to a circuit of a service power supply; a control circuit consists of a relay power supply and a control switch which are connected in series with an electromagnet of the normally closed electromagnetic relay; the control switch is a normally open contact switch; and a control point of the normally open contact switch is arranged in a lock catch box of a service door lock to correspond to the end part of a lock lever. The device adopts the control circuit consisting of the conventional 3V or 1.5V power supply and the normally closed relay; when a door is locked, the contact of the relay is disconnected to control the cut-off of the service power supply flexibly, save energy, and prevent occurrence of a fire disaster and other safety accidents; meanwhile, the device can eliminate personal fatalness, has a simple structure, flexible reaction and low cost.

Description

technical field [0001] The invention relates to a safety and energy-saving device, in particular to a door lock power-off device. Background technique [0002] Electricity is one of the indispensable energy sources for production and life, which brings great convenience to daily life and production. At the same time, electricity is also an extremely dangerous safety hazard, especially in places where there is no supervision for a long time, it is relatively easy to cause fires caused by aging lines, short circuits or electrical appliances. Especially in areas where items are piled up in factories, warehouses, etc., fires are extremely prone to occur. [0003] In order to prevent fires caused by electric facilities, an air switch is generally installed on the incoming line to automatically trip when a short circuit occurs in the line. Although it can prevent accidents to a certain extent, it cannot prevent accidents caused by overheating of lines or electrical appliances. ....

AI Technical Summary

Problems solved by technology

However, the door lock power-off device of the prior art directly controls the power supply of the household, and the existing locksets are all made of conductive metal, which is more dangerous to the person and is prone to serious safety accidents such as electric leakage.

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