WO1981000157A1

WO1981000157A1 - Watch with molded dome adapted to the works

Info

Publication number: WO1981000157A1
Application number: PCT/FR1980/000107
Authority: WO
Inventors: F Zangiacomi; P Morata; D Huotmarchand
Original assignee: Ebauches Sa; F Zangiacomi; P Morata; D Huotmarchand
Priority date: 1979-07-04
Filing date: 1980-07-03
Publication date: 1981-01-22
Also published as: FR2460499A2; FR2460499B2; JPS56500973A; GB2065340A

Abstract

Watch and more particularly wrist-watch of small size. This watch comprises a dome (101) which is fixed onto the plate (112) by means of a metal ring (116) concentric with the screw (105) which allows to secure the holding strap (104) of the electrical battery (103) on the post (113) driven on the plate (112). This securing system provides for a good stability of the dome and is particularly appropriate to small sizes.

Description

WATCH WITH MOLDED CAP SUITABLE FOR MOVEMENT.

The present invention relates to a watch and in particular a small wristwatch comprising a movement made up of a set of components mounted on a plate and covered with a protective cap.

In the assembly described, the cap has a peripheral rim and shoulders serving as support for the plate driven out inside the rim. For certain sizes, it is preferable to mount the cap on the plate by different means, this in order to reduce the external dimensions of the cap.

This is why the watch according to the invention is carac¬ terized in that it comprises means associated with the battery fixing flange, for fixing the cap on the plate.

According to a preferred embodiment, these means comprise a pillar secured to the plate, a screw which passes through the free end of the flange and the head of which bears on it to fix it on said pillar, and a metal ring concentric with said screws and whose lower and upper edges are respectively in contact with the printed circuit and the battery fixing flange. This ring has a peripheral groove, in which the conical flange provided around an opening of the cap is driven, concentric with said ring.

The present invention will be better understood with reference to the description of an embodiment and the accompanying drawing, in which: FIG. 1 represents a top view of the block fixed by the retaining screw of the flange which maintains the stack, and Figure 2 shows an enlarged sectional view of the fixing means of the cap.

With reference to the figures, the cap 101 shown seen from above in FIG. 1, has a slightly oblong opening 102 which allows the easy replacement of the electric battery 103. This battery is held in position by a flange 104 whose free end has an opening for the passage of a fixing screw 105. The other end is curved in the shape of an S and engages in a recess (not shown) arranged in the thickness of the side wall of the cap. The cap also comprises a central opening 106 which allows access to the frequency corrector (not shown) and two openings for the passage of the screws 107 and 108 intended to make the watch face integral and platinum. Guide flanges 109, 110 and 111 facilitate the positioning of the cap on the plate.

Referring more particularly to FIG. 2, the means for fixing the cap 101 on the plate 112 essentially comprise a pillar 113 whose end 114 of reduced diameter is chased in a bore 115 of the plate, a ring 116 and the screw 105. The pliers 113 includes a shoulder 117 on which the substrate 11 of the printed circuit rests, and a second shoulder 119 intended to center the substrate 118. The upper annular face of the ring 116 is in contact with the flange 104 on which the flat head of the screw 105 rests engaged with a tapping 120 arranged in the pillar 113. The cap 101 has a circular opening concentric with the ring 116 and whose edge 121 has a conical shape which cooperates with a peripheral groove 122 of the ring 116 for retaining the cap 101 in position.

The ring 116 has a double function. On the one hand, it is in contact with the metallized track 123 of the printed circuit carried by the substrate 118, which makes it possible to ensure passage _; of the current from this metallized track to the flange 104 and, consequently, to the battery 103. On the other hand, it ensures, thanks to its peripheral groove 122, the maintenance of the monkfish 101 on the plate 112.

This. method of attachment ensures very good stability of the cap and adapts well to small sizes for which it is advantageous to have a cap whose overall dimensions are as small as possible.

O PI / ,, WIPO

Claims

1. Watch comprising a movement consisting of a set of components mounted on a plate and covered with a protective cap, characterized in that it comprises means associated with the battery fixing flange, for fixing the cap on the plate.

2. Watch according to claim 1, characterized in that said means comprise a pillar integral with the plate, a screw for fixing the free end of said flange on said pillar and a metal ring, concentric with said screw.

3. Watch according to claim 2, characterized in that the ring has a cylindrical bore whose diameter corresponds to the outside diameter of the fixing screw, a lower planar annular bearing surface which allows the ring to '' press on the upper surface of the substrate and ensure electrical contact with at least one metallized track of the printed circuit, an upper planar annular bearing surface which allows the ring to establish electrical contact with the fixing flange resting on it , and a peripheral surface comprising an annular groove, arranged to accommodate the conical edge provided around an opening of the cap, concentric with said ring.