CN201165796Y - Anti-theft door lock with lock door push rod contacts - Google Patents

Abstract

The utility model relates to an anti-theft lock head of the door lock in buildings which comprises a lock gate, a pushing bar and an electric contact. The lock gate 5 hindering the toggling from a foreign body is arranged in the key inserting hole of the lock core, and an electric contact switch in the lock is controlled by the opening and the closing of the lock gate. Normally, the lock gate is pressed by a torsion spring 6 and presents a closing state. When an unlocking tool is inserted from the key inserting hole, the lock gate is opened, to push the pushing bar 8 to move outward and to press the electric contact piece 10, and thus the contact point is switched on. The contact point is separated when the key and the lock core are revolved. An alarming lock can be formed when the electric contact is connected with a time delay alarming apparatus. When the lock is normally unlocked, the lock core is revolved after the key is inserted into for one or two seconds, the time delay circuit is put off before the toggling of the time delay circuit, and the alarming apparatus can not warn. If a wrong key or foreign body is used to unlock and the lock core can not be rotated after the preset delaying time, the alarming apparatus warns.

Description

Door push rod with lock contact security door tapered end

Technical field

The utility model relates to a kind of building door lock anti-theft lock end of locking a door with the electrical contact switch device that has.

Background technology

Existing building door lock, all be that the lock core end face is open, keyhole runs through two ends, and the thief can utilize the instrument of master key or iron wire and so on to insert in the hole smoothly and choose, dial pellet shot from a slingshot, or with the slowly runin of unreserved seating key, the structure of tapered end is preventing to lack better guarantees aspect the aforesaid operations.

Summary of the invention

The purpose of this utility model provides a kind of anti-theft lock end, increases at the slotting keyhole of tapered end lock core and hinders foreign matter and insert the obstacle of stirring, and the interlock contact switch, and can realize the overtime warning of unblanking after the delayed alarm device links to each other.

The purpose of this utility model is achieved in that to be provided with in the slotting key aperture of lock core and locks a door that there is a push rod back of locking a door, and there is electric contact point the push rod outside, locks a door to be subjected to the pressure of torsion spring and to be in normally off.When key or other unlocking tools insert lockhole, lock a door and open, and the push rod of the back that promotes to lock a door, push rod promotes to be located at the electric contact point of lock core periphery again, makes contact and engage contacts.When lock is opened, push rod rotates together in company with lock core and leaves electric contact point, and electric contact point is by self elastic reset, circuitry cuts.

Description of drawings

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is the A-A section of Fig. 1.

Fig. 3 is circuit theory diagrams of the present utility model.

Among Fig. 1: 1. ball lock head 2. joint bolts 3. lock core a set of cups 4. tapered end seats 5. 6. torsion springs, 7. ram seat, 8. push rods, 9. push rod stage clips, 10. electric contact points, 11. attachment pegs, 12. outer covers, 13. keys of locking a door

Among Fig. 2: 10. electric contact point 14. solder joints

Among Fig. 3: 15. tapered ends, 16. electric contact points, 17. hand switches, 18. lock bodies, 19. batteries, 20. time relays, 21. alarms

The specific embodiment

In Fig. 1, the front end of ball lock head 1 connects tapered end seat 4 with joint bolt 2, tapered end seat internal cylinder a set of cups 3 usefulness attachment pegs 11 connect with lock pin coaxial, and lock core a set of cups end face has slotting keyhole over against the lock core hole place, and the axial inboard in hole establishes one can lock a door 5 to what the key direction of insertion rotarily opened.At ordinary times, lock a door and pushed down, become closed condition by torsion spring 6.When key or other unlocking tools insert from keyhole, lock a door around self axle center rotation, open towards 90 ° of directions, promote to be contained in the push rod 8 on lock core a set of cups and the ram seat 7, and make it to move to circumference along the tapered end radial direction.Be fixed with a pair of electric contact point 10 at tapered end seat circumferential inner wall.When push rod compressing electric contact point, make it to engage, circuit is connected.Turn lock core rotation in lock as key, push rod rotates and leaves electric contact point, circuitry cuts together in company with lock core.Normally unblank, key insert the back one, two second internal cylinder promptly rotate, power supply had broken before the delay circuit action.Unreserved seating key or foreign matter insert and unblank, and its uncaging time is longer than the check mark key unlocking time certainly.Give the time-delay of setting earlier when surpassing, lock core does not rotate as yet, and the alarm that links to each other with electric contact point is sounding alarm then.When extracting key or unlocking tool, lock a door and under the torsion spring effect, close.Electric contact point and push rod are by the elastic reset of electric contact point.In the initial orientation that lock core hole rotates, the position when promptly key inserts and extracts, electric contact point all has engaging process.Because very short in this place's time of staying when key is extracted, it only is moment that circuit engages, normal condition can not reach the time-delay time limit, therefore can not start warning circuit.In order to increase the reliability that push rod resets, on push rod, increased stage clip 9 among the figure.The connecting line of electric contact point is drawn by the rear end face of tapered end.Outer cover 13 plays the linking intensity that increases ball lock head and tapered end seat and effect attractive in appearance is arranged.Make for convenience, it is assembled that the lock core a set of cups also can be divided into 2,3 parts.

Fig. 3 is a kind of alarming lock embodiment of circuit.Wherein battery 19, the time relay 20, alarm 21 all are contained in the lock body 18.When unlocking tools such as key insert or extract lockhole, the joint or the disconnection of the open and close controlling electric contact point 16 of locking a door.The time relay 20 has been set the length that key inserts delayed alarm time behind the lockhole.Alarming lock just is in stand-by state behind the hand switch 17 that closes.

Claims (4)

1. a door push rod with lock contact safe-guard door lock tapered end is characterized in that having and can rotating lock a door (5) of opening towards the key direction of insertion in the slotting key aperture of lock core, torsion spring (6), and there is a push rod (8) back of locking a door, and there is electric contact point (10) the push rod outside.

2. according to the described door push rod with lock of claim 1 contact safe-guard door lock tapered end, it is characterized in that locking a door (5), torsion spring (6), push rod (8) all are contained on the lock core a set of cups (3), and after lock core connected, ball lock head (1) and tapered end seat (4) connected with screw (2).

3. according to the described door with lock push rod of claim 2 contact safe-guard door lock tapered end, it is characterized in that the lock core a set of cups can make with the method for assembly unit.

4. according to the described door push rod with lock of claim 1 contact safe-guard door lock tapered end, it is characterized in that and to form alarming lock with alarm.