Horology: time measuring systems or devices – Cases – Wrist worn
Patent
1994-08-11
1996-01-09
Miska, Vit W.
Horology: time measuring systems or devices
Cases
Wrist worn
224164, G04B 3700
Patent
active
054835054
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a quick-fixing device for a watchband and more particularly to a fixing device comprising an elastic bar one element of which is firmly connected to an operating button disposed under the watchband whose operation permits the introduction or removal of the bar, corresponding openings being formed in one of the cusps of a watchcase.
Fixing devices for watchbands are intended to permit easy replacement of watchbands. Up to now watchbands were replaced for reasons of wear or aging and these replacements were not very frequent so that the use of a quick-fixing device was not required. For several years manufacturers have proposed several types of watchbands for the same watch and replacements are becoming much more frequent to adapt different watchbands as one pleases depending on the use, the color or the fashion. It has thus become necessary for users to be able to effect a practical and quick replacement of the watchbands themselves.
Numerous forms of fixing devices for watchbands are known but they all present disadvantages. The best known and most widespread forms consist of a simple elastic bar, but these forms present the essential disadvantages of being impractical because the removal or introduction of the bar generally necessitates the use of a tool. With these known forms it is possible to remove or introduce the bar using a fingernail but the small dimension of the elements makes this very impractical and therefore inadequate for frequent replacements. Examples are known, which do not include introduction openings or positioning openings and the fixing of the bars often requires several attempts.
The objective of the present invention is thus to remedy the disadvantages of the known forms.
The objectives are reached by the principle of the invention as described by claim 1.
According to the principle of the invention, the quick-fixing device for a watchband comprises an elastic bar which includes two elements sliding in one another and subject to the action of an elastic compression member. The ends of the bar are intended to cooperate, in the service position, with holes formed in the cusps of the watchcase. This form presents numerous advantages, the most important one being the fact that the easy action of the button enables an introduction and an easy and practical disengagement of the bar which, consequently, leads to a very handsome replacement operation of the watchband elements for every user, which is especially important for frequent replacements. Another important advantage is the fact that the operating button is disposed on the underside of the watchband, i.e. between the watchband and the wrist of the user, eliminating any risk of unintentional action. According to the invention, the cusps comprise openings with forms facilitating the positioning and the introduction of the bar. The principle of the invention further present the advantage that due to the easiness of the introduction and the disengagement of the bar the device can be used as a lock by simply modifying the case.
The adjoined drawings illustrate the principle of the invention schematically and by way of example.
FIG. 1 is a sectional view of the quick-fixing device for a watchband, in a closed position.
FIG. 2 is a bottom view of the fixing device in a closed position.
FIG. 3 is a sectional view of the fixing device in a positioning position.
FIG. 4 is a sectional view of the fixing device in an intermediate introduction position.
FIG. 5 is a side detail of one of the cusps constituting the fixing device.
Referring first to FIGS. 1 and 2, an elastic bar comprises two main elements, shaft 1 and rod 2 which is slidingly mounted in cylindrical hole 3 formed in shaft 1. Elastic member 4 is mounted in cylindrical hole 3 and acts when compressed against the bottom of the cylindrical hole and against the inside end of rod 2. Elastic member 4 can comprise a spring. Shaft 1 is mounted in one of the ends of one of watchband elements 5. Shaft 1 includes rod 10 whose end has a semispherical shape. Ro
REFERENCES:
patent: 4564308 (1986-01-01), Ikegami et al.
patent: 5373484 (1994-12-01), Rappo et al.
Cavanagh O'Connor
Mauboussin, S.A.
Miska Vit W.
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