Key pullout reminding device

A reminding device and key technology, applied in windows/doors, building components, special equipment for doors/windows, etc., can solve the problem of not remembering, and achieve the effects of reasonable structure, good market prospects, and easy realization.
CN103741997AInactive Publication Date: 2014-04-23张敬敏
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
张敬敏
Publication Date
2014-04-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a key pullout reminding device, and belongs to electronic detection and reminding devices. The device comprises a time relay, a power supply, a sounding device, an alarming lamp, a lock cylinder ejector rod, and a travel switch arranged at the front end of a lock hole of a security door, wherein the time relay adopts an electrifying delay type time relay, and is provided with a first normally open contact and a second normally open contact; a coil of the time relay is connected with the power supply through the travel switch; the sounding device is connected with the power supply through the first normally open contact of the time relay; the alarming lamp is connected with the power supply through the second normally open contact of the time relay. The key pullout reminding device can detect keys inserted in the lock hole, and reminds users when the users forget to pull out the keys to avoid chance for criminals. The key pullout prompt device also has a doorbell function, so that the stronger practicability is achieved.
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Description

technical field

[0001] The invention relates to a reminder device for extracting a key, belonging to electronic detection and reminder devices. Background technique

[0002] Along with the raising of people's living standard, every household has installed anti-theft door, and this has brought guarantee to the property of the resident and personal safety undoubtedly. However, in daily life, due to haste, some people entered the door without pulling out the key after opening the door, and did not think of pulling out the key left in the lockhole afterwards, which brought opportunities for lawbreakers. . Contents of the invention

[0003] Aiming at the problems in the background technology, the present invention proposes a key extraction reminding device, which can remind the user when he forgets to remove the key, so as to avoid opportunities for lawbreakers.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions: [...

Claims

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