Buckles – buttons – clasps – etc. – Strap tighteners – Strap-attached folding lever
Patent
1998-11-18
2000-02-15
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Strap tighteners
Strap-attached folding lever
24 68J, 24265WS, 24 583, A43C 1100
Patent
active
06023816&
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a lock device for a buckle of a personal adornment band such as a watch band, bracelet and others, and more particularly to a double lock device for a buckle such as a double-folded buckle, triple-folded buckle, opposed buckle which opens like the casement window.
BACKGROUND ART
The triple-folded buckle, for example, has three plates which are pivotally connected with each other. The three plates comprise a lower plate as a base, a middle plate, and a surface cover as a rotating portion.
Japanese Utility Model Laid Open 6-19527 discloses a lock device for the triple-folded buckle. The device has an engaging portion, a pair of push buttons slidably mounted on the underside of a cover so as to be moved in the lateral direction with respect to the longitudinal direction of a band, and a lock pin projected from a lower plate. The buckle is locked by engaging an engaging portion of each push button with the lock pin, and the lock is released by pushing the push button at the same time.
However, there may occur that the push buttons are pushed by a foreign thing so that the buckle is removed. As means for preventing such a trouble, Registered Utility Model 3001890 discloses a double lock device for the triple-folded buckle. The device has a lock cover pivotally mounted on a lower plate. The lock cover is adapted to be engaged with a pin of a spring-loaded pin attached to a surface cover.
Such a device has disadvantages that the number of parts increases due to the spring-loaded pin, which causes the manufacturing cost to increase. There must provide a space necessary for attaching the spring-loaded pin, resulting in enlargement of the buckle and in complication of construction.
An object of the present invention is to provide a lock device resolving the above described problems.
DISCLOSURE OF THE INVENTION
The lock device according to the present invention is characterized by the buckle having a first middle plate operatively connected to an end of a first band, and a lower plate rotatably connected to the first middle plate and operatively connected to a second band, the lock device comprising,a first lock device and a second lock device,wherein the first lock device comprises a guide housing provided in the buckle, at least one push button having an engaging portion and slidably mounted in the guide housing, a spring for outwardly urging the push button, and lock means adapted to be engaged with the push button, and the second lock device comprises a lock cover operatively connected to the lower plate at an end thereof, and engaging means for engaging the lock cover with the push button to hold the lock cover at a closing position.
In an aspect of the present invention, the first middle plate is connected to the first band through a surface cover.
The engaging portion is a hook formed in the push button, and the lock means is a lock pin to be engaged with the hook.
It is preferable to provide a torsion spring provided for urging the lock cover to an open direction.
The engaging portion has an engaging projection, and the lock means is an opening formed in the lower plate so as to be engaged with the engaging projection.
The engaging means comprises an engaging projection formed in the push button and provided to be projected from an opening formed in a side wall of the surface cover, and an engaging hole formed in the lock cover so as to be engaged with the engaging projection.
The engaging projection is provided to be further engaged with an engaging hole formed in the lock cover.
The lock cover may be provided to be released by opening thereof.
The push button may comprise a first push button and a second push button, the engaging projection is formed in the first push button, the lock cover is provided to be released by pushing the first push button.
The push plate may comprise a first push button and a second push button, the engaging projection is formed in the first push button, an engaging plate is formed in the second push button so as to extend i
REFERENCES:
patent: 2532840 (1950-12-01), Gaun
patent: 4928359 (1990-05-01), Gagnebin
patent: 5305503 (1994-04-01), Yamagata
patent: 5313691 (1994-05-01), Hashimoto
patent: 5485659 (1996-01-01), Kashikie et al.
Hashimoto Norio
Okada Kimio
Citizen Watch Co. Ltd.
Sakran Victor N.
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