CN2739307Y

CN2739307Y - Acousto-optic warning safety door lock

Info

Publication number: CN2739307Y
Application number: CN 200420062563
Authority: CN
Inventors: 吕九春
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-09
Filing date: 2004-07-09
Publication date: 2005-11-09
Anticipated expiration: 2014-07-09

Abstract

The utility model relates to an acoustic-optic warning safety door lock having the function of preventing people from forgetting to take off a key, belonging to the technical field of the hardware tool. The door lock comprises a lock body and a lock core, also comprising a warning circuit which comprises a battery, a warning device and an on-off control device. The on-off control device is arranged on the front and the back two ends of the lock core, when the key is inserted to the door lock, the circuit is communicated, and when the key is pulled out, the circuit is cut off. So when a householder inserts the key to the door lock in order to open a door, the warning circuit is conducted, if the householder forgets to take out the key, the warning device can warn and remind the householder, and when the key is pulled out after the door is opened, the warning circuit is cut off. Therefore, the acoustic-optic warning safety door lock can prevent the serious consequence cause by the householder forgetting to pull out the key due to some reasons after the door is opened and can also avoid the trouble that because the key is inserted from the inner part of the room and is not pulled out, and the householder is out, the door can not be opened. The utility model mode can also prevent lawless persons using stealing tools to prize the door lock.

Description

The watchful safety door latch of acousto-optic

Technical field

The utility model relates to a kind of door lock, especially a kind of have prevent to forget the watchful safety door latch of the acousto-optic that takes off the key function.

Background technology

Need safety guarantee be provided for people's life with key operated door lock.But, if after door lock opens, forget and take off key, then might make it lose the due safe effect of guaranteeing, as a result the have to door lock that in time more renews of householder.Otherwise as meeting with the unprincipled fellow unfortunately, consequence is hardly imaginable.In addition, many security doors can't open the door from outdoor insertion key when from indoor insertion key, if forget when going out and pull up indoor key, then will very bother.

Summary of the invention

The technical problem that will solve of the present utility model is: at the shortcoming that above prior art exists, proposes a kind of behind the insertion key watchful householder do not forget the watchful safety door latch of the acousto-optic that takes off.

In order to solve above technical problem, the watchful safety door latch of acousto-optic of the present utility model comprises lock body, lock core, also comprise watchful circuit, described watchful circuit comprises battery, alarm appliance, and switch control device, described switch control device is placed in the lock core rear and front end, connects circuit when key inserts, and cuts off circuit when key is extracted.

Like this, when the householder opens the door the insertion key, watchful circuit turn-on, if forget taking-up, alarm appliance is with the warning reminding householder; After after opening the door, extracting key, watchful circuitry cuts.Its beneficial effect has:

1, can prevent that the householder from opening the door after, forget for a certain reason and pull up key, cause hardly imaginable consequence;

2, can avoid not pulling out and going out, cause the trouble that to open the door from the key of indoor insertion;

3, can prevent that the unprincipled fellow from using stealing tool pirate of the open door lock.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the structural representation of the utility model embodiment one.

The specific embodiment

Embodiment one

The watchful safety door latch of the acousto-optic of present embodiment is formed mainly due to lock body 1, lock core 2 and watchful circuit as shown in Figure 1.Watchful circuit comprises battery E, light emitting diode D, Tip Sound B, and switch control device K2, K3, K4.Wherein, battery E, light emitting diode D, Tip Sound B, master switch K2 connect mutually.Resilient contact K switch 3 and K4 are housed respectively inside and outside the lock core 2, and when key inserted, resilient contact was connected circuit, and resilient contact flicks the cut-out circuit when key is extracted.Two contact switch K3, K4 are connected in parallel in the watchful circuit.In addition, battery E connects with doorbell button switch K1, doorbell F, forms the independent doorbell circuit with watchful circuit common source.

This shows that the watchful safety door latch of the acousto-optic of present embodiment not only can forgotten the taking-up key, sound and light alarm when perhaps improper thing is inserted as lock core, and with doorbell utility power, operation separately, so organically combine.Because use for reference and used existing electronic warning control technology, so technology is simple, cost is low, the reliability height is easy to promote.

In addition to the implementation, the utility model can also have other embodiments.For example, sound and light alarm device has independently change-over switch, therefore can select as required to use; For another example, switch control device adopts Hall switch or photoelectric switching device; Or the like.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims

1. watchful safety door latch of acousto-optic, comprise lock body, lock core, it is characterized in that: also comprise watchful circuit, described watchful circuit comprises battery, alarm appliance, and switch control device, described switch control device is placed in the lock core rear and front end, connects circuit when key inserts, and cuts off circuit when key is extracted.

2. according to the watchful safety door latch of the described acousto-optic of claim 1, it is characterized in that: described switch control device is Hall switch or optoelectronic switch.

3. according to the watchful safety door latch of the described acousto-optic of claim 1, it is characterized in that: the resilient contact switch that is connected in parallel in the watchful circuit is housed respectively inside and outside the described lock core.

4. according to the watchful safety door latch of the described acousto-optic of claim 3, it is characterized in that: also comprise doorbell circuit with described watchful circuit common source.

5. according to the watchful safety door latch of the described acousto-optic of claim 4, it is characterized in that: described alarm appliance is a sound and light alarm device---light emitting diode and Tip Sound.

6. according to the watchful safety door latch of the described acousto-optic of claim 5, it is characterized in that: described sound and light alarm device has independently change-over switch.