Electromagnetic lock locked state anti-spoofing structure

Abstract

The invention discloses a locking state cheat-proofing structure of an electromagnetic lock. The structure comprises a door frame, a door body, a locking indication lamp, a current limiting resistor, a power switch, a magnetic induction locking contact, an electromagnet coil, an RFID tag and a control switch; the locking indication lamp is in series connection with the current limiting resistor and then is in parallel connection to the two ends of the electromagnet coil, an RFID card reader is arranged on the door frame, the RFID tag is arranged on the door body, the RFID card reader corresponds to the RFID tag in position, the electromagnet coil, the power switch, the magnetic induction locking contact and the control switch are in sequential series connection and then are connected with the two ends of a power source, when the RFID tag installed on the door is close to the RFID card reader on the door frame along with door closing, the RFID card reader receives the RFID tag information and enables the control switch to be closed. According to the structure, the defect that a traditional electromagnetic lock locking state is easily cheated is overcome, the correct locking state is ensured, the loophole of a safety protection system is avoided, and the safety of an entrance guard is ensured.

Description

technical field [0001] The invention relates to an anti-fraud structure of an electromagnetic lock in a locked state. Background technique [0002] Electromagnetic locks are widely used in various access control systems. It is an electromechanical interlocking device, which generally includes an electrical control part and a mechanical execution part. The electrical control part is as follows: figure 1 As shown, the electrical control part generally has a locking indicator light H, a power switch S, a magnetic induction locking contact KA and an electromagnet coil L. The lamp H is connected in series with the resistor R and then connected in parallel to both ends of the electromagnet coil L; the mechanical execution part generally includes a casing, a lock bolt, a return spring, and an electromagnet mechanism. When the power button and the magnetic induction locking contact are connected, the electromagnet coil is energized, and the electromagnet mechanism drives the lock b...

AI Technical Summary

Problems solved by technology

[0003] But above-mentioned electromagnetic lock also has certain defect, and promptly the locked state of door is deceived easily, and when the door is in non-closed position, only need take another magnetic bead close to magnetic induction switch, turn on power switch at the same time, electromagnet coil is the same. Electricity, so that the electromagnetic lock performs the locking action and sends the door locked signal to the background control system, but at this time the door is actually in the unlocked state, that is, the locked state is deceived

Since the magnetic induction switch cannot distinguish the real identity of the magnetic bead, the locked state is deceived, resulting in a large loophole in the application of the electromagnetic lock to the security system.

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