Electromagnetic lock and opening and closing method

By integrating a sliding plate and an electromagnet, the design solves the problem of miniaturization of existing electromagnetic locks, achieving miniaturization and reduced failure rate, making it suitable for subway platform door systems.

CN116146048BActive Publication Date: 2026-05-26BEIJING VOCATIONAL COLLEGE OF TRANSPORTATION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING VOCATIONAL COLLEGE OF TRANSPORTATION
Filing Date
2021-11-22
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing electromagnetic locks in subway platform door systems require separate limit switches for the closing position of the left and right sliding doors, which prevents the structure from being miniaturized and increases the failure rate.

Method used

An electromagnetic lock is designed by integrating the limit switches and electromagnets of the left and right sliding doors onto a sliding plate. The movement of the sliding plate is used to lock and unlock the left and right sliding doors, reducing the space requirement of the limit switches and realizing the miniaturization of the electromagnetic lock.

Benefits of technology

This technology enables the miniaturization of electromagnetic locks, reduces the failure rate, and makes them suitable for applications with limited installation space.

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Abstract

This invention discloses an electromagnetic lock, comprising a base plate, an electromagnet mounting plate, a front mounting plate, a rear mounting plate, an electromagnet, a guide post, a right electromagnetic lock limit switch, a right sliding door limit switch, a slide plate, a left electromagnetic lock limit switch, a left sliding door limit switch, a right swing arm, a right rotating shaft, a right stop pin, a left swing arm, a left rotating shaft, a left stop pin, and a manual transmission rod. The slide plate can move up and down. The sliding door limit switch can send an open-to-close signal, and the electromagnetic lock limit switch can send a closed-to-close signal. When the slide plate moves to the upper position, the electromagnetic lock can unlock both sliding doors to allow them to open. When the slide plate moves to the lower position, the electromagnetic lock can lock both sliding doors. The lower part of the slide plate is provided with a locking tongue adapted to the square hole of the sliding door. The electromagnetic lock of this invention has a simple structure, reliable operation, and can reduce the product failure rate in limited installation situations.
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