Locks – Special application – For closures
Reexamination Certificate
2001-04-09
2003-03-04
Knight, Anthony (Department: 3676)
Locks
Special application
For closures
C070S110000, C070S279100, C070S278700, C070S283000
Reexamination Certificate
active
06526787
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a door lock device, and more particularly to a door lock device which is provided with means to drive a lock bolt and a lock tongue coaxially.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a door is provided with a lock
1
which has a lock core for connecting a doorknob
2
so as to control the action of a lock tongue
11
. An auxiliary lock
3
has a lock core which is connected with a key insertion seat
4
to facilitate the control of the lock bolt
31
by a key. The lock
1
and the auxiliary lock
3
are independent of each other and must be purchased and mounted at an extra cost. In addition, the doorknob and the key insertion seat
4
undermine the esthetic effect of the door.
As shown in
FIG. 2
, a linking structure comprises a shell
5
which is provided with an upper lock tongue hole
51
, a lower lock tongue hole
52
to facilitate the action of the upper lock tongue
61
and the lower lock tongue
62
. A linking mechanism
7
is disposed in the shell
5
for linking the lock tongues
61
and
62
. A retaining block
71
is used to join the door knob
81
for driving the upper lock tongue
61
. A lock core
72
has one end into which a key is inserted, and other end which is connected with a rotary knob
82
. Both ends can actuate the lock tongues
61
and
62
by means of the linking mechanism
7
. The lock tool has a considerably large volume. The door body must be provided with two through holes for use in connecting the lock core and the retaining block with the door knob or key. The door knob and the key insertion seat undermine the external appearance of the door body.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a door lock device capable of driving coaxially the lock bolt and the lock tongue. The device comprises a main body, a lock bolt, a lock tongue, a spindle and a moving collar. The main body is provided with a lock bolt, a lock tongue, and a spindle which is provided at both ends with a retaining portion. A lock bolt transmission mechanism connects the lock bolt. The retaining portion is connected with a lock control mechanism. The spindle is provided at both ends with a moving collar having a retaining portion which is externally connected with a rotating mechanism. The door lock is capable of driving the lock bolt and the lock tongue by means of the spindle and the moving collar, or the lock control mechanism and the rotating mechanism, thereby resulting in a substantial reduction in volume of the lock tool. In addition, the door lock can be easily installed at low cost.
It is another objective of the present invention to provide the spindle with a dragging portion which is connected with the insertion portion of the lock bolt. The insertion portion of the lock bolt is provided with an insertion slot in which the dragging portion of the spindle is confined, thereby preventing the lock bolt from withdrawing.
REFERENCES:
patent: 3672714 (1972-06-01), Schultz
patent: 4838053 (1989-06-01), Shen
patent: 5027625 (1991-07-01), Krachten
patent: 5421178 (1995-06-01), Hamel et al.
patent: 5495731 (1996-03-01), Riznik
patent: 5657653 (1997-08-01), Hensley et al.
patent: 5857365 (1999-01-01), Armstrong
patent: 6131966 (2000-10-01), Hensley et al.
patent: 6223567 (2001-05-01), Fadul
patent: 6374653 (2002-04-01), Gokcebay et al.
patent: 2122244 (1984-01-01), None
Knight Anthony
Kyle Michael J.
Liauh W. Wayne
Summit Automation Co. Ltd.
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