Remote-controlled door lock

Details Remote-controlled door lock Remote-controlled door lock

2002-07-18

2003-12-09

Knight, Anthony (Department: 3676)

Locks

Operating mechanism

Using a powered device

C070S256000, C070S107000, C070S280000

Reexamination Certificate

active

06658905

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a remote-controlled door lock, particularly to one provided with a bolt-locking device capable of being controlled by a remote controller to extend a bolt rod of the bolt-locking device to be inserted into and engaged with an engagement hole of a strike base installed in a doorframe, thereby locking a doorplate in a limited position. When the door plate is locked with the bolt rod of the bolt-locking device still engaged with the engagement hole of the strike base, the door plate is unable to be completely unlocked only by a key without using the remote controller to actuate the bolt rod of the bolt-locking device to be disengaged from the engagement hole of the strike base, thus achieving a best effect of anti-theft.
2. Description of the Prior Art
A conventional key-operated door lock, as shown in
FIG. 1
, includes a case body
10
provided with a lock base
11
, a pull plate
12
and a latch-bolt assembly
13
disposed therein. The lock base
11
has deadbolts
110
provided at one side thereof and capable of extending out of through holes
100
formed in a sidewall of the case body
10
to be inserted into and engaged with an elongated opening
141
formed in sidewall of a strike base
140
installed in a door frame
14
. The lock base
11
further has two lock cores
111
respectively disposed in an inner and an outer sides thereof and each provided with a keyhole
112
. The pull plate
12
is disposed in the inner side of the case body
10
and has a fixing plate
120
extending into a slide groove
101
of the case body
10
and attached relatively to a fixing plate
102
of the case body
10
. One end of the latch-bolt assembly
13
extends through the fixing plate
102
of the case body
10
to be secured to the fixing plate
120
of the pull plate
12
. A spring
130
is sleeved on the latch-bolt assembly
13
adjacent to the end thereof. The other end of the latch-bolt assembly
13
is provided with a stop member
131
capable of extending out of a through hole
103
formed in a sidewall of the case body
10
to be inserted into and engaged with the elongated opening
141
of the strike base
140
. When a key is inserted in the keyhole
112
of one of the lock cores
111
to turn, the deadbolts
110
and the stop member
131
can be disengaged from the elongated opening
141
of the strike base
140
, thus unlocking the conventional key-operated door lock.
However, such a conventional key-operated door lock only using a key to force the deadbolts
110
to be engaged with the elongated opening
141
the strike base
140
can be easily pried unlocked by thefts with simple picking tools or special tools, thus losing the anti-theft function.
SUMMARY OF THE INVENTION
The main purpose of the invention is to offer a remote-controlled door lock having a best effect of anti-theft.
The main feature of the invention is to provide a case body having a battery base, a circuit board and a bolt-locking device disposed therein, the bolt-locking device having a motor, a driving gear disposed at an upper end of the motor, a driven gear meshed with the driving gear, a transmission gear coaxially disposed below the driven gear, a gear rack meshed with the transmission gear, and a bolt rod disposed at a front portion of the gear rack and capable of extending out of a through hole formed in a sidewall of the case body; and, a strike base installed in a doorframe having an engagement hole formed in a sidewall thereof for corresponding in location to be aligned with the bolt rod of the bolt-locking device.


REFERENCES:
patent: 1358445 (1920-11-01), Hermanowich
patent: 4833465 (1989-05-01), Abend et al.
patent: 4840050 (1989-06-01), Gotanda
patent: 4929003 (1990-05-01), McConnell
patent: 5626039 (1997-05-01), Solari et al.
patent: 5636880 (1997-06-01), Miller et al.
patent: 5790034 (1998-08-01), Khoury
patent: 5852944 (1998-12-01), Collard et al.
patent: 5987818 (1999-11-01), Dabideen
patent: 6012310 (2000-01-01), Hsiao
patent: 6112563 (2000-09-01), Ramos
patent: 6381999 (2002-05-01), Doong
patent: 2196382 (1988-04-01), None

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