Reminding device for preventing key from being forgotten to be pulled

Abstract

A reminding device for preventing a key from being forgotten to be pulled is characterized by comprising a magnetic device arranged on the key and a delayed alarm circuit arranged on a lock. An alarm sounder L1 is connected between a collector electrode of an audion N1 and a positive pole of a power supply. The installing position of a magnetic control trigger switch K1 on the lock meets the conditions: when the key is inserted into a lock cylinder hole of the lock in place, the magnetic control trigger switch K1 can be in an attracted state under the magnetic effect of the magnetic device, and after the key is pulled out of the lock cylinder hole of the lock, the magnetic control trigger switch K1 is reset to be in a disconnected state. The reminding device for preventing the key from being forgotten to be pulled has the advantages that installation is simple and convenient without change of an existing lock structure; the magnetic device on the key and the magnetic control switch on the delayed alarm circuit are utilized to trigger and close the delayed alarm circuit, the sensitivity is high, the operation is practical and convenient; the delayed alarm design is flexible, and the reminding device does not influence normal unlocking and counter locking, can timely remind an owner within two or three seconds after the key is forgotten to be pulled and is suitable for production and popularization.

Description

technical field [0001] The invention relates to a lock design technology, in particular to a reminder device for preventing forgetting to pull out a key. Background technique [0002] In today's society, people's pace of life is getting faster and faster, and they are too busy to attend to one thing and lose another; the elderly have a bad memory and tend to forget things. They often go in and out of the room, and the key is inserted in the lockhole and left without pulling it out, which brings opportunities for criminals. Similar to forgetting to pull out the key and causing the theft of family property occurs frequently, and it is getting more and more serious. In order to better prevent theft cases, people are constantly designing some new types of locks that can prevent theft, such as the Chinese patent "Sound Keychain" (Patent No.: 201120350009.7), which involves a technology that can easily and quickly find To prevent the key from being lost, it has a decorative soun...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems existing in the prior art, especially in order to solve the problem of family safety hazard caused by forgetting to pull out the key, the present invention provides a reminder device for preventing forgetting to pull out the key (also known as: reminder treasure for forgetting to pull out the key). When people forget to pull out the key beyond the set time after unlocking with the key, an alarm sound can be issued in time to remind people to pull out the key in time to avoid theft.

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