Horology: time measuring systems or devices – Cases – Wrist worn
Patent
1996-03-01
1997-05-20
Roskoski, Bernard
Horology: time measuring systems or devices
Cases
Wrist worn
368281, 24176, A44C 500, G04B 3700
Patent
active
056318790
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a wrist watch with an interchangeable strap.
The invention can be applied to particular advantage in the watch-making industry.
DESCRIPTION OF RELATED ART
Various types of wrist watches with interchangeable straps have been proposed in the past. In particular, there is a known watch whose strap, in two parts, can be mounted and taken off by the flipping over of a tip providing access to an attachment rod, fixedly joined to the watch, along which each of the parts of the strap can slide in either direction. This mode of interchangeability of the strap has, however, the drawback of being delicate and not very practical in its use. This results, in the long term, in wear and tear and in a deterioration of the tips and the attachment rods.
There also is a known wrist watch whose strap, which is a single unit, is provided with a central slot designed to be fitted about a body on the middle supporting element of the watch.
While such a configuration enables speedy and easy changing of the strap, this type of watch has, however, the drawback wherein the strap can easily slip away from the body and get detached from the middle supporting element once it is no longer clasped against the user's wrist.
SUMMARY OF THE INVENTION
Thus, the technical problem to be resolved by the object of the present invention is that of proposing a wrist watch with interchangeable strap, comprising a middle supporting element comprising a body, and a strap, forming a single unit, provided with a central slot designed to be fitted about said body that makes it possible, in all circumstances, to ensure that the strap is held positively to the middle supporting element of the watch, without, furthermore, any detrimental effect on the general aesthetic quality of the watch.
The solution to the technical problem raised consists, according to the present invention, in the fact that said wrist watch comprises a cover that can be folded down over the strap by rotation about a hinge made on the middle supporting element, said cover and said middle supporting element bearing clasp means and means for opening the cover on the middle supporting element.
In order to improve the holding of the strap to the watch, it is also provided according to the invention that the body will be surmounted by a gouged feature, said central slot of the strap being capable of being fitted about said body by flexible deformation at the passage of said gouged feature, and inversely.
Thus, the bracelet is held in the middle supporting element of the watch by the gouged feature which prevents any involuntary motion withdrawing the strap. However, a relatively slight force is sufficient to engage or disengage the strap when there is encountered the resistance set up by the gouged feature whose size is slightly greater than that of the slot of the strap. This method of interchangeability is therefore very simple to use and does not require any complex mechanical part. This ensures its reliability. This reliability is further increased owing to the fact that, in order to limit the wear and tear undergone by the slot during the passage of the gouged feature, the invention provides that the slot will made through a central stiffening web prepared in said strap. In particular, said central stiffening web is made of Kevlar (registered mark).
It will be noted that the design of the wrist watch that is an object of the invention is such that it complete integrates the strap into the aesthetics of the watch which, apart from its nominal function, becomes an essential element of decoration that warrants its interchangeability.
In one particular embodiment of the invention, the clasp means are formed by a notch made in the cover, working together with a catch-spring positioned on the middle supporting element, while said opening means are formed by a button of said catch-spring. Advantageously, said button is integrated with a ring of the watch winding mechanism.
In this way, the clasping of the cover is done by simple
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patent: 1484420 (1924-02-01), Suderov
patent: 1760689 (1930-05-01), Domler
patent: 2189096 (1940-02-01), Alonge
patent: 3492809 (1970-02-01), Gisiger-Lusa
patent: 4167850 (1979-09-01), Schneider
patent: 4964092 (1990-10-01), Brida
patent: 5065376 (1991-11-01), Choulat
patent: 5206841 (1993-04-01), Boucheron
Kondracki Edward J.
Montres Pequignet
Roskoski Bernard
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