Closure fasteners – Operators with knobs or handles
Reexamination Certificate
2002-04-10
2003-09-23
Estremsky, Gary (Department: 3677)
Closure fasteners
Operators with knobs or handles
C070S467000
Reexamination Certificate
active
06623053
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an inside locking device of a flat handle lock, and more particularly to an inside locking device of a flat handle lock, wherein the flat handle lock at the inside of the door plate may be locked in a pressing manner, and has a simpler construction.
2. Description of the Related Art
A conventional handle lock structure in accordance with the prior art is disclosed in U.S. Pat. No. 5,284,372, which is shown in FIG.
1
. The conventional handle lock structure comprises an outer handle
81
, and an inner handle
82
. The inner handle
82
is combined with a sleeve
83
which receives a push button
84
, a drive tube
85
, and an elastic member
86
therein. The push button
84
may be protruded outward from the hole
821
of the inner handle
82
, and may be pressed. The push button
84
is formed with a breach
841
for insertion of the protruding bar
831
of the sleeve
83
, so that the push button
84
is limited to move linearly. The push button
84
is formed with an annular groove
842
for hooking the hook
851
of one end of the drive tube
85
whose other end is provided with a rectangular slot
852
and a lug
853
. The outer handle
81
has a plate
811
locked in the rectangular slot
852
. The lug
853
of the drive tube
85
is locked in the guide channel
832
of the sleeve
83
to perform the linear and rotational operations. When the conventional handle lock structure needs to be locked, the push button
84
is pressed, the lug
853
of the drive tube
85
may be moved in the guide channel
832
of the sleeve
83
linearly, and may be rotated, so that the plate
811
may be rotated, thereby locking the conventional handle lock structure.
In the conventional handle lock structure as shown in
FIG. 1
, the outer handle
81
is a conventional tubular lock structure, and the inner handle
82
is made by improving the conventional tubular lock, whereby it can be locked by the key, so that the inner handle
82
can be locked by pressing the push button
84
. In the conventional handle lock structure as shown in
FIG. 1
, each of the outer handle
81
and the inner handle
82
has a cylindrical shape, so that the conventional handle lock structure is inconvenient to the handicap. In addition, the shapes of the parts of the push button
84
and the drive tube
85
are more complicated, thereby increasing cost of fabrication. Further, the positioning effect of the push button
84
is not good.
A conventional flat handle lock structure in accordance with the prior art is disclosed in U.S. Pat. No. 5,809,815, which is shown in FIG.
2
. The conventional flat handle lock structure comprises an inner handle unit
91
, an outer handle unit
92
, an unlocking unit
93
, and a control unit
94
. When the conventional flat handle lock structure is used in the inside of the door plate, the push button
95
may be pressed, so that the hook
952
on the safety bar
951
is locked in the slotted wall
932
of the retractor
931
provided by the unlocking unit
93
, thereby forming a locking state. When the conventional flat handle lock structure is used in the outside of the door plate, the correct key
96
may drive the lock core of the lock core unit
97
to rotate, thereby controlling the locking and unlocking actions.
The conventional flat handle lock structure as shown in
FIG. 2
is made by improving the tubular lock structure of the conventional flat handle lock. Each of the inner handle unit
91
and the outer handle unit
92
uses the shank-shaped handle, and the unlocking unit
93
adopts the design of the retractor. Thus, The conventional flat handle lock structure as shown in
FIG. 2
has a complicated structure.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide an inside locking device of a flat handle lock, wherein the handle lock is available for a flat handle, and the handle lock at the inside of the door plate may be locked in a pressing manner.
A secondary objective of the present invention is to provide an inside locking device of a flat handle lock, wherein the flat handle lock has a simpler construction.
In accordance with the present invention, there is provided an inside locking device of a flat handle lock, comprising:
an outer handle unit, having a fixing disk provided with a rotatably outer handle having an elongated shank, the outer handle capable of driving a drive tube to rotate, the outer handle unit having a lock core set that may drive a lock control plate to rotate; and
an inner handle unit, having a fixing disk provided with a sleeve, the sleeve having an inside provided with a bottom plate, the outer handle having an elongated shank being combined on the sleeve, the inside of the sleeve receiving an unlocking plate, a first elastic member, a control cylinder, and a push button, one end of the push button protruding outward from a hole provided in the inner handle, the unlocking plate being received in the control cylinder from one end of the control cylinder, the unlocking plate having a drive hole for passage of one end of the lock control plate, the unlocking plate being provided with at least one ear plate locked in at least one guide slot of the control cylinder, the guide groove having two ends each having an annular groove parallel with the end of the control cylinder, the control cylinder being provided with a protruding plate that is locked in a straight slot formed in the sleeve, the other end of the control cylinder being combined with the push button, one end of the first elastic member being rested on the unlocking plate, and the other end of the first elastic member pushing a wall of an inner end of the control cylinder.
REFERENCES:
patent: 2814194 (1957-11-01), North
patent: 2950615 (1960-08-01), Schlage
patent: 3105712 (1963-10-01), Duvall
patent: 3916656 (1975-11-01), Schlage
patent: 5941108 (1999-08-01), Shen
Bacon & Thomas PLLC
Estremsky Gary
Taiwan Fu Hsing Industrial Co., Ltd.
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