Remote-controlled door lock

Abstract
A remote-controlled door lock includes a lock shell provided inside with a battery base, a circuit board, a deadbolt and two electromagnetic valves. The deadbolt has a through hole connected sidewise to a slide slot with a smaller breadth than the diameter of the through hole. The two electromagnetic valves are respectively positioned on and under the door bolt. The two electromagnetic valves are controlled to operate by a remote controller and actuate the deadbolt to move to a limited position. The deadbolt cannot be unlocked with a key only before it is released by a remote controller, thus obtaining the best effect of anti-theft.
Description




BACKGROUND OF THE INVENTION




1. Field of the Invention




This invention relates to a remote-controlled door lock, particularly to one provided in a lock shell with two electromagnetic valves able to be controlled by a remote controller to operate relatively and actuate a deadbolt to move to a limited position, with a door lock impossible to be unlocked only by a key before it is relieved by a remote controller, thus achieving a best effect of anti-theft.




2. Description of the Prior Art




A conventional door lock, as shown in

FIG. 1

, includes a lock shell


10


installed with a lock base


11


inside. The lock base


11


is provided at one side with lock rods


110


able to extend out of the through hole


100


on the sidewall of the lock shell


10


. The lock base


11


is further provided with a lock core


111


with a keyhole respectively at the inner and the outer side. Then, a pull plate


12


is fitted in the inner side surface of the lock shell


10


, having a fixing plate


120


inserted in the slide hole


101


of the lock shell


10


and facing the fixing plate


102


of the lock shell


10


. The lock shell


10


is further installed inside with a deadbolt


13


having one end inserted through the fixing plate


102


of the lock shell


10


and secured with the fixing plate


120


of the pull plate


12


, with a spring fitted around one end of the door bolt


13


near the pull plate


12


. The deadbolt


13


has the other end fixed with a stopper


131


able to extend out of the through hole


103


in the sidewall of the lock shell


10


. Thus, when a key is inserted in the keyhole


112


of the lock core


111


and turned around to force the lock rods


110


and the stopper


131


to move inward toward the lock shell


10


, the door lock can be unlocked.




However, a conventional door lock is to have its lock rods


110


locked only by a key so it can easily be pried unlocked with some unlocking tools, having bad effect of anti-theft.




SUMMARY OF THE INVENTION




The objective of the invention is to offer a remote-controlled door lock having good effect of anti-theft.




The feature of the invention is that a lock shell is installed inside with a battery base, a circuit board, a deadbolt and two electromagnetic valves. The deadbolt is bored with a through hole connected sidewise to a slide slot with a smaller breadth than the diameter of the through hole. The two electromagnetic valves are respectively positioned on and under the deadbolt, and the electromagnetic valve on the deadbolt is provided with a downward valve rod having a stopper on the end, with the valve rod and the stopper inserted through the through hole of the deadbolt, while the electromagnetic valve under the deadbolt is provided with a lateral valve rod having a blocking plate at the outer end for stopping and holding the stopper of the electromagnetic valve on the door bolt.











BRIEF DESCRIPTION OF DRAWINGS




This invention will be better understood by referring to the accompanying drawings, wherein:





FIG. 1

is a cross-sectional view of a conventional door lock;





FIG. 2

is an exploded perspective view of a remote-controlled door lock in the present invention;





FIG. 3

is a perspective view of the remote-controlled door lock in the present invention;





FIG. 4

is another perspective view of the remote-controlled door lock in the present invention;





FIG. 5

is a cross-sectional view of the remote-controlled door lock locked by a remote controller in the present invention;





FIG. 6

is a cross-sectional view of the remote-controlled door lock in the process of being unlocked by a remote controller in the present invention; and,





FIG. 7

is a cross-sectional view of the remote-controlled door lock unlocked in the present invention.











DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT




A preferred embodiment of a remote-controlled door lock in the present invention, as shown in

FIGS. 2

,


3


and


4


, includes a lock shell


2


, a lock base


3


, a pull plate


4


, a battery base


5


, a circuit board


6


, a deadbolt


7


, and two electromagnetic valves


8


and


9


as main components combined together.




The lock shell


2


has the lock base


3


installed in the interior, a slide hole


22


bored in a rear wall, a fixing plate


23


fixed at a side of the slide hole


22


, a projection


24


fixed on an inner surface of a left side wall, an opening


25


bored in the rear wall and a cover plate


26


provided to close up the opening


2


, and a warning lamp


27


fixed on an outer surface of the rear wall




The lock base


3


is installed inside the lock shell


2


and provided with lock rods


30


able to extend out of the through holes


20


on the right side wall of the lock shell


2


, with another through hole


21


bored on the right side wall of the lock shell


2


above the through holes


20


.




The pull plate


4


is formed with a vertical connect plate


40


to be inserted in the slide hole


22


of the lock shell


2


, with a spring


41


having one end fitted around the projection


24


in the lock shell


2


and the other end pushing against the connect plate


40


of the pull plate


4


.




The battery base


5


and the circuit board


6


are installed inside the lock shell


2


, the former located at the opening


25


of the lock shell


2


and closed up by a cover plate


26


.




The deadbolt


7


is positioned horizontally inside the lock shell


2


, having one end fixed with a block


70


extending in the through hole


21


of the lock shell


2


and the other end inserted through the fixing plate


23


of the lock shell


2


and fixedly combined with the connect plate


40


of the pull plate


4


. Besides, the deadbolt


7


is bored with a through hole


71


connected sidewise to a slide slot


72


with a comparatively smaller breadth than the diameter of the through hole


71


.




The two electromagnetic valves


8


and


9


are respectively provided on and under the deadbolt


7


. The upper electromagnetic valve


8


has a valve rod


80


protruding downward and a stopper


81


at the lower end. The valve rod


80


together with the stopper


81


is inserted movably through the through hole


71


of the deadbolt


7


. The lower electromagnetic valve


9


has on one side with a lateral valve rod


90


provided with a blocking plate


91


for stopping and supporting the stopper


81


of the upper electromagnetic valve


8


.




In using, as shown in

FIGS. 5

,


6


and


7


, to lock the door lock, simply insert a key in the keyhole and turn it around to let the lock rods


30


of the lock base


3


extend outward and get into the lock hole in a door jamb. Then, press the locking button of a remote controller to let the two electromagnetic valves


8


and


9


operate. At this time, the upper electromagnetic valve


8


will begin exciting magnetism and its valve rod


80


will shrink upward and cut off electricity, while the lower electromagnetic valve


9


will also begin exciting magnetism and cutting off electricity to let its valve rod


90


protrude out. Meanwhile, the stopper


81


of the upper electromagnetic valve


8


moves up together with the valve rod


80


to locate in the through hole


71


of the door bolt


7


, having its bottom side stopped and held by the blocking plate


91


of the lower electromagnetic valve


9


to prevent the stopper


81


from moving down. Since the breadth of the slide slot


72


of the deadbolt


7


is smaller than the diameter of the stopper


81


, the stopper


81


can stop the deadbolt


7


immovable, and as a consequence the block


70


of the deadbolt


7


cannot move inward. Thus the door lock is locked completely. In this case, even though the lock rods


30


of the lock base


3


are unlocked, the door lock still cannot be unlocked unless a remote controller is employed to release the deadbolt


7


first, thus acquiring the best effect of anti-theft.




On the contrary, to unlock the door lock, as shown in

FIGS. 6 and 7

, only press the unlocking button of the remote controller to let the two electromagnetic valves


8


and


9


operate. Then the electromagnetic valve


8


begins exciting magnetism and cuts off electricity, and its valve rod


80


will protrude downward, and when the electromagnetic valve


9


begins exciting magnetism, its valve rod


90


will shrink inward and cut off electricity. At this time, the blocking plate


91


of the lower electromagnetic valve


9


no longer stops or supports the bottom side of the stopper


81


of the upper electromagnetic valve


8


, and therefore the stopper


81


will move downward together with the valve rod


80


and get away from the through hole


71


of the door bolt


7


, while the valve rod


80


will still remain in the through hole


71


. As the diameter of the valve rod


80


is smaller than the breadth of the slide slot


72


of the deadbolt


7


, the valve rod


80


can slide in the slide slot


72


, and hence the deadbolt


7


together with its block


70


can be moved inward. Then a key is inserted in the keyhole and turned around to let the lock rods


30


of the lock base


3


moved inward to get away from the lock hole of a door jamb, and then the door lock is easily unlocked.




In addition, when the electricity in the battery in the battery base


5


is used up, the two electromagnetic valves


8


and


9


will repeat the unlocking motion as described above to unlock the deadbolt


7


, and the warning lamp


27


will give out light to remind a user to renew the battery, with a beeper available to take the place of the warning lamp


27


.




The principle of controlling and actuating of the two electromagnetic valves


8


and


9


is applicable to the lock rods of various locks. When the lock rods are position-limited by the two electromagnetic valves


8


and


9


, the lock cannot be unlocked by means of a key only before it is relieved with a remote controller, equally having the best effect of anti-theft.




While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.



Claims
  • 1. A remote-controlled door lock comprising a lock shell, said lock shell provided with a lock base in the interior and a through hole bored in a right side wall and a slide hole bored in an upper portion of a rear wall, said slide hole provided inside with a fixing plate, said lock shell further having a projection on an inner surface of a left side wall, a pull plate provided to have a vertical connect plate, said vertical connect plate of said pull plate inserted in said slide hole of said lock shell, a spring having one end fitted around said projection of said lock shell and the other end pushing against said connect plate of said pull plate, a deadbolt installed horizontally in the interior of said lock shell, said deadbolt having one end fixed with a block, said block able to be inserted in said through hole of said lock shell, said deadbolt having the other end inserted through said fixing plate of said lock shell and fixedly combined with said connect plate of said pull plate; and,wherein a battery base and a circuit board installed in said lock shell, said deadbolt bored with a through hole, a slide slot connected sidewise to said through hole and having a smaller breadth than the diameter of said through hole, an upper electromagnetic valve on said deadbolt provided with a valve rod having a stopper at an end, said valve rod and said stopper inserted through said through hole of said deadbolt, a lower electromagnetic valve under said door bolt provided with a valve rod having a blocking plate at an outer end, said blocking plate stopping and supporting said stopper of said upper electromagnetic valve on said deadbolt, said upper and lower electromagnetic valves controlled by a remote controller to operate, said upper and lower electromagnetic valves allow the deadbolt to be actuated to move to a limited position by said pull plate when said upper and lower electromagnetic valves are in an unlock position said deadbolt impossible to be unlocked by a key only before it is released by a remote controller, having the best effect of anti-theft.
  • 2. The remote-controlled door lock as claimed in claim 1, wherein a warning lamp is fixed on an outer surface of said lock shell for checking the electricity of the battery in said battery base.
US Referenced Citations (6)
Number Name Date Kind
2765648 Hatcher Oct 1956 A
4784415 Malaval Nov 1988 A
5216909 Armoogam Jun 1993 A
5588318 Osborne Dec 1996 A
5943888 Lawson Aug 1999 A
6462431 Woo Oct 2002 B1