Locks – Operating mechanism – Key
Reexamination Certificate
2001-08-24
2003-02-18
Barrett, Suzanne Dino (Department: 3626)
Locks
Operating mechanism
Key
Reexamination Certificate
active
06519988
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to a lockset, and in particular, to a lockset including a lock body having a lock body and a key having at least one end corner being a skew face, wherein a lock hole is formed at the latch of the lock body and is corresponding to the skew face.
(b) Description of the Prior Art
As shown in
FIG. 1
, a conventional lockset comprises a key
1
and a lock
2
, and is fitted to a door or the like to prevent unauthorized intruder from entering a locked compartment. The four corners of the key
1
are right angled and are flat structures, and the two sides of the flat structures are provided with a long slot
11
having recesses
12
of various sizes. The lock
2
includes a lock body
21
and a latch
22
, and the latch
22
is a cylindrical body for mounting into the cavity hole
211
of the lock body
21
. The center of the latch
22
is a lock hole
222
having a similar shape as that of the key
1
. The four corners of the lock hole
221
are right angled such that the key
1
can be inserted into the lock hole
221
corresponding to the recesses
12
of the key
1
. A plurality of bead holes
212
are provided on the lock body
21
. As shown in
FIG. 2
, at the external of the lock body
21
, corresponding to the bead hole
212
, a covering plate
213
is provided thereto, and the external of the bead hole
212
is covered. The bead hole
212
is then inserted with a spring
214
and a bead
215
, and the bead
215
is cylindrical shape or bead-like. A bead hole
222
is provided to the latch
22
, which is corresponding to the bead hole
212
. The bead hole
222
reaches the lock hole
221
, and a bead
223
is inserted into the bead hole
222
. The bead
223
is cylindrical shape or a bead body, and the exterior of the bead
215
is urged by the spring
214
. Thus the inner side of the bead
215
is protruded to the bead hole
222
of the latch
22
, such that the bead
223
urged by the bead
215
moves to the lock hole
221
. As the bead
215
is protruded into the bead hole
212
, the latch
22
is blocked by the bead
215
and therefore, the latch
22
is prevented from rotating.
As shown in
FIG. 3
, if the lockset is to be unlocked, the key
1
is inserted into the lock hole
221
. That is the recess
12
of the key
1
pushes the bead
223
and in turn, the bead
215
is pushed out, causing the spring
214
to retract. The retraction of the spring
214
causes the bead
215
to return to the bead hole
212
. The latch
22
will not be blocked by the bead
215
and the key
1
can rotate to unlock the lockset. If the key
1
is not matching with the lockset, the spring
214
will be compressed and this causes the bead
223
to protrude into the bead hole
212
, or the bead
215
into the bead hole
222
. This restricts the latch
22
. However, the drawback of the convention structure lockset is that only one precaution is provided by the lockset and if the bead can be kept in alignment with the bead hole, the lockset is unlocked. As a result if the conventional lockset is tampered with a specific device, the lockset can be unlocked. Therefore, it is an object of the present invention to provide a structure of a lockset which mitigates the above drawbacks.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a structure of a lockset, wherein by means of a key together with a latch formed with a lock hole having at least an end corner being a corresponding skew face, and the skew face of the key is provided with a recess, and the latch and the lock body at the corresponding end corner are provided with pegging beads to enhance the binding force of the rotation of the latch so that the locking effect of the lockset is obtained.
Yet another object of the present invention is to provide a structure of a lockset, wherein the positive face pegging bead interlaced with the skew face pegging bead, and the skew face pegging bead urges the rail wall of the recess to enhance the binding force of the rotation of the latch so that the locking effect of the lockset is obtained.
It is an object of the present invention to provide a structure of a lockset, wherein by means of a key together with a latch formed with a lock hole having at least an end corner being a corresponding skew face, any key with un-matching angle is prevented from inserting into the lock hole so as to avoid other parties to open the lockset with un-matching keys.
The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
REFERENCES:
patent: 4196604 (1980-04-01), Vorob
patent: 4343166 (1982-08-01), Hofmann
patent: 4612787 (1986-09-01), Prunbauer et al.
patent: 4667495 (1987-05-01), Girard et al.
patent: 5131249 (1992-07-01), Baden et al.
patent: 5485735 (1996-01-01), Laabs et al.
patent: 5493884 (1996-02-01), Hinz et al.
patent: 5533369 (1996-07-01), Valdajos-Gallego
patent: 5724841 (1998-03-01), Botteon
Barrett Suzanne Dino
One Lus International Co., Ltd.
Rosenberg , Klein & Lee
LandOfFree
Structure of a lockset does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure of a lockset, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure of a lockset will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3143125