FR2460499A2 - - Google Patents

Abstract

The present invention relates to a watch and in particular to a small wristwatch. This watch comprises a cap 101 which is fixed on the plate 112 by means of a metal ring 116 concentric with the screw 105 which makes it possible to fix the flange 104 for retaining the electric battery 103 on a pillar 113 driven on the plate 112. This method of attachment ensures good stability of the shell and adapts well to small calibers.

Description

1.

  The present invention relates to a watch and in particular to a watch

  a small bracelet, as defined in the main provisions.

  In the exemplary embodiment described in the main patent, the

  monkfish has a peripheral rim and shoulders serving as a support for the platen driven inside the rim. For certain calibres, it is preferable to mount the cap on the plate by different means, this

  to reduce the outer dimensions of the cap.

  The present invention proposes to provide another means of fixing

  of the cap, particularly well suited to small caliber.

  This is why the watch according to the invention is characterized in that it comprises means associated with the fixing flange of the battery, for

fix the cap on the plate.

  According to a preferred embodiment, these means comprise a pillar integral with the plate, a screw which passes through the free end of the flange and whose head rests on it to fix it on said pillar, and a metal ring. concentric to said screw and whose lower and upper edges are respectively in contact with the printed circuit and the flange

  fixing the battery. This ring has a peripheral groove, in the-

  what is chased the conical rim provided around an opening of the cap,

concentric to said ring.

  The present invention will be better understood with reference to the description

  an embodiment and the appended drawing, in which FIG. 1 shows a top view of the cap fixed by the retaining screw of the flange which holds the battery, and FIG. 2 shows an enlarged sectional view of the fastening means

of the cap.

  With reference to the figures, the cap 101 shown on top of

  fig. 1, has a slightly oblong opening 102 which allows the replacement

  easy stacking of the electric battery 103. This battery is held in position

  by a flange 104 whose free end has an opening for the pass-

  The other end is bent S-shaped and engages in a recess (not shown) arranged in the thickness of the side wall of the cap. The cap also has a central opening

  106 which allows access to the frequency corrector (not shown) and two

  vertices for the passage of the screws 107 and 108 intended to make the

  dran of the watch and platinum. Guide flanges 109, 110 and 111 facilitate

  try setting up the cap on the plate.

  Referring more particularly to FIG. 2, the means for

  the cap 101 on the plate 112 essentially comprise a pillar 113 whose end 114 of reduced diameter is driven into a bore 115 of the plate, a ring 116 etila screw 105. The pillar 113 has a shoulder 117 on which bears the substrate 118 of the printed circuit, and a second shoulder

  119 in the present embodiment for centering the substrate 118. The annular face

  upper ring of the ring 116 is in contact with the flange 104 on which rests the flat head of the screw 105 engaged in a tapping 120 formed in the pillar 113. The cap 101 has a circular opening concentric to the

  ring 116 and whose edge 121 has a conical shape which cooperates with a peripheral groove

  122 of the ring 116 to retain the cap 101 in position.

  The ring 116 has a dual 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 the passage of the current of this metallized track to the flange 104 and, consequently, to the battery 103. On the other hand, it ensures, thanks

  its peripheral groove 122, the maintenance of the cap 101 on the plate 112.

  This method of attachment ensures a very good stability of the cap and adapts well to the small sizes for which it is advantageous

  to have a cap whose overall dimensions are as small as possible.

- 2 - - 3.-

Claims (3)

  1. Watch according to the claims of the main patent,   characterized in that it comprises means associated with the fastening flange   of the battery, to fix 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, centric to said screw.   3. Watch according to claim 2, characterized in that the ring comprises a cylindrical bore whose diameter corresponds to the outer diameter of the fastening screw, a lower flat annular bearing surface.   which allows the ring to rest on the upper surface of the substrate and   on the electrical contact with at least one metallized track of the printed circuit, an upper planar annular support surface which allows the ring to establish the   electrical contact with the fastening flange resting on it, and a perished surface.   phérique comprising an annular groove, arranged to house the conical edge provided   around an opening of the cap, concentric with said ring.