CN2748593Y - Automatic alarming theftproof door lock - Google Patents

Abstract

The utility model provides an automatic alarming theft-proof door lock, comprising a force-limiting switch composed of an alarm reed 5 and a lock catch 2, and the force-limiting switch is arranged in the lock catch 2 of a present door lock. Under the normal lock-up state, the switch can not be conducted. When the force used for prying the door is greater than the tightening force of a fastening screw, the relative displacement is produced between the lock catch 2 and the fastening spot of the lock catch 2, or a plastic support stand 8 deforms, and thus the force-limiting switch can be conducted. As a result, an alarm 9 sends out the alarm signal to prevent the door from prying, decreasing the rate of the false alarm.

Description

The automatic alarm anti-theft door lock

Technical field

The utility model relates to a kind of safe-guard door lock, especially the safe-guard door lock that can report to the police automatically.

Technical background

Existing safe-guard door lock partly is made up of tapered end, lock body and snap close etc., is installed in respectively on door leaf and the doorframe, and dead bolt enters in the snap close automatically or by the tapered end driving, stops door leaf to be opened, to reach antitheft purpose.Because social security sternness at present, most thieves utilize people's work of going out daytime, and the chance that there is no one at home by the mode of forcing open the door by force, is gone into the room theft, makes many families suffer serious loss.Because the opening direction of door is covered in having, cover outward and mode such as push-and-pull, cover in wherein timber mostly is; Iron gate mostly is outer and covers; The iron of push-pull fashion, timber has.When the thief forces open the door, weak if cover mode in the door because of the fastening force of snap close, be snap close comes off in the time of most; When covering the iron gate of mode outside lock body is contained in,, often cut off during installation, changed on the front fastening with screw because of the bad collection of the mounting plate of stretching under the lock body.Because the iron sheet of door is very thin, number of threads is limited, makes its fastening force weak, falls lock body often; Both are stressed similar for sliding door, and the possibility that comes off is also similar.The family in city generally all is the existing outer iron gate of covering for safety, the timber of covering in also having.When violence was forced open the door, no matter fall snap close or fall lock body, Men Douhui was pried open.

The someone copies spherical door lock that the principle of additional dead bolt is set for this reason, has designed a warning tongue on dead bolt, and under normal locking state, the warning tongue can only support the outside of snap close, can not be overhanging.In case door is pried open, and is not supporting because of there being snap close, the warning tongue stretches out under the promotion of spring force, makes the warning circuit conducting and reports to the police.Because door is just can report to the police after being opened, if at this moment there is no one at home, the thief is easy to follow sound and finds alarm, and it is destroyed, and the effect of its burglar alarm will disappear.The chimes of doom of short time is difficult for attracting much attention, and can think false alarm.And the thief can sound out in the room whether the people is arranged earlier usually before forcing open the door, and therefore the protection effect of this type of alarm is limited.In addition, owing to must have crack between a door and its frame to exist between door and the doorframe, and, make the difference in size of crack between a door and its frame very big because be subjected to the quality of door itself and the influence of installation quality quality, therefore exist the warning tongue how to adapt to this big-difference, and the problem that how to prevent to produce false alarm.

Summary of the invention

In order to overcome the above-mentioned deficiency of existing theftproof lock, the utility model provides a kind of new type auto alarm burglar-proof door lock, and it can not only be reported to the police automatically, also is difficult for producing false alarm, and is just can report to the police in just beginning to force open the door, and the thief is refused in outdoors.

The purpose of this utility model is achieved in that and should sets about from two aspects: should increase on the one hand the overhang of lock body and snap close mounting plate, it is more to make snap close sting the wood of doorframe; Or the quantity of the diameter of increase screw and increase screw thread.The difficulty of forcing open the door with increase and need time of usefulness makes door be unlikely to moment and is promptly pried open; On this basis, cooperate autoalarm again, just can refuse the thief in outdoors.Method is the inside at snap close, and the contact of alarm switch is set along the direction of opening the door.For making the automatic alarm anti-theft door lock can adapt to the various directions of opening the door, a warning reed can be set all on the various directions of forcing open the door.Bearing surface one side at snap close is provided with a plastic stent, and it highly is higher than the warning reed, and the warning reed is higher than the dead bolt through port of snap close; Make the warning reed above the dead bolt place the position higher slightly than the dead bolt through port of snap close; The warning reed and the snap close that are provided with in the snap close rear end have suitable distance; And these several warning reeds are together in parallel, be connected to an end of power supply again, constitute a contact of limit power switch.The other end of power supply is connected on the conductive reed, makes this conductive reed become Elastic Contact with snap close, snap close is communicated with into another contact of switch.Like this, under normal locking state, because snap close or plastic stent make warning reed and dead bolt, snap close remain certain distance to the iris action of dead bolt, each other can conducting.Only the violence when the thief forces open the door has surpassed the intensity of the fastening force or the doorframe of screw, makes snap close produce along the displacement of the direction of opening the door; Or plastic stent produces when being out of shape, and because of the function served as bridge of dead bolt they is linked together; Perhaps both directly couple together themselves.This time limit power switch just can be the alarm conducting.Because this fastening strength on door leaf or doorframe of snap close and lock body is strengthened, make them separate certain process of needs and time with fastening point, and when they produced some displacements or distortion, snap close was by dead bolt and the conducting of warning reed, and alarm is reported to the police with regard to conducting at once.Alarm can be self-sustaining after can being arranged to of short duration conducting; Can also set up a plurality of alarms separately in different places, also not be opened with side door, just four sides chimes of doom is given strong shock of thief; Have a guilty conscience after all, have to lose no time escape.Thereby reach automatic alarm anti-theft of the present utility model, refuse the thief in outdoors, and the purpose that can reduce false alarm.

Description of drawings

Below in conjunction with drawings and Examples, the utility model is further described: Fig. 1 is circuit theory diagrams of the present utility model, and Fig. 2 is the structural representation of first embodiment of the utility model, and Fig. 3 is the sectional view of Fig. 2; Fig. 4 is the structural representation of second embodiment of the utility model, and Fig. 5 is the sectional view of Fig. 4.

Among the figure: the 1-lock body, the 2-snap close, 3-power supply A end, 4-power supply B end,

5-warning reed, 6-conductive reed, 7-dead bolt, 8-plastic stent

The 9-alarm, the 10-radiating circuit, 11-receives and warning circuit.

The specific embodiment

Fig. 2 embodiment is a kind of automatic alarm anti-theft door lock of external, and its warning circuit is except limit power switch, all the other all place outside the lock, and the limit power switch of this circuit is set in snap close.Power supply A end 3 is electrically connected with alarm 9 and warning reed 5 orders, and warning reed 5 is composed in parallel by the reed of 3 different directions settings, a contact of the power switch that becomes to exceed; Power supply B end 4 is electrically connected with conductive reed 6 and snap close 2, and conductive reed 6 and snap close 2 are Elastic Contact, makes exceed another contact of power switch of 2 one-tenth of snap closes.Wherein two warning reeds 5 are arranged at the both sides up and down of dead bolt 7 in opposite directions, and a slice above the order places high slightly position on dead bolt 7 through ports of snap close 2, and following a slice then places lower slightly than the supported end of plastic stent 8, than the high slightly position of dead bolt 7 through ports.Make the 3rd to place apart from about 1 mm distance in snap close 2 rear ends.Like this, under the situation of normally locking, dead bolt 7 can only contact with snap close 2 or plastic stent 8, can not touch warning reed 5, therefore can not trigger alarm signal.When the robber forces open the door, because strength is very big, the fastening strength that exceeds screw, or the intensity of doorframe, make snap close 2 begin to produce displacement or make plastic stent 8 begin to produce and be out of shape, which direction no matter force open the door is on, contacts with snap close 2 by dead bolt 7 always have a slice warning reed 5, perhaps directly contacts with snap close 2.That is to say that alarm 9 is switched on, thereby be triggered warning.Reach alarming anti-theft, refuse the thief in purpose outdoors.Owing to be difficult for making snap close 2 to produce displacements or make plastic stent 8 distortion, the possibility that therefore false alarm take place seldom.

The embodiment of Fig. 4 is half built-in wireless automatic alarming safe-guard door lock, and it resolves into two parts of radiating circuit 10 and reception and warning circuit 11 to alarm 9, and two parts are battery-powered respectively.Battery and radiating circuit 10 are arranged within the snap close 2, and the positive pole of battery is a power supply B end 4, and it is connected to snap close 2 by conductive reed 6 elasticity, make an exceed contact of power switch of 2 one-tenth of snap closes; The negative pole of battery is power supply A end 3, directly connects radiating circuit 10 and warning reed 5.Identical with the embodiment of Fig. 2,3 warning reeds 5 that compose in parallel also are set, make its become another contact of the power switch that exceeds; Its set-up mode is also identical.Different is, because the volume of battery and integrated package is bigger, the position that makes warning reed 5 be provided with has change slightly.When the thief forces open the door, can make limit power switch conduction equally, but not be alarm signal to be derived outside the lock after the conducting by lead, reach alarm 9; But go out by radio wave transmission by radiating circuit 10, receive and warning circuit 11 becomes pulse signal to the electric wave signal that receives again, outwards report to the police.Can realize equally that various directions are forced open the door and all report to the police, reach burglar alarm, refuse the thief in purpose outdoors, also can make false alarm takes place possibility seldom.

Make in this way to be provided with, can remove the power line that exposes from, receive and warning circuit 11 also can be provided with at a distance, also can be provided with a plurality ofly, and can be covered up, also do not influence the attractive in appearance of doorframe.

Claims (6)

1. automatic alarm anti-theft door lock, by lock body 1, snap close 2, power supply A end 3, power supply B end 4, warning reed 5, conductive reed 6, dead bolt 7, plastic stent 8 and alarm 9 are formed; Power supply A end 3 is electrically connected with alarm 9, warning reed 5 orders, power supply B end 4 electrically connects with conductive reed 6 and snap close 2, and place in the snap close 2, it is characterized in that: snap close 2 is provided with along the direction of opening the door in proper order with warning reed 5, both enough distances of being separated by, the fastening force that has only surpassed screw in the violence of forcing open the door, both just understand electric connection when making snap close 2 produce displacement along the direction of opening the door.

2. automatic alarm anti-theft door lock according to claim 1 is characterized in that: plastic stent 8, warning reed 5 and snap close 2 are provided with in proper order along the direction of opening the door, when certain deformation takes place in plastic stent 8, and snap close 2 and warning reed 5 electric connections.

3. automatic alarm anti-theft door lock according to claim 1 and 2 is characterized in that: warning reed 5 is composed in parallel by a plurality of reeds.

4. according to claim 1 or 2 and 3 described automatic alarm anti-theft door locks, it is characterized in that: alarm 9 adopts battery powered mode, is placed in the snap close 2.

5. automatic alarm anti-theft door lock according to claim 4, it is characterized in that: alarm 9 adopts wireless remote control, split mode, be made up of radiating circuit 10 and reception and warning circuit 11, radiating circuit 10 is arranged in the snap close 2, receives and warning circuit 11 can be hidden at a distance.

6. automatic alarm anti-theft door lock according to claim 5 is characterized in that: reception and warning circuit 11 have a plurality of, are hidden in different places.

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