Device for attaching an interchangeable bracelet for a timepiece

1. A rapid attachment device of an interchangeable watch bracelet for wrist watches, the device comprising a body used as a push button and being adapted to be housed slidingly in a watch case, the body bearing a retaining stem arranged parallel to the plane of the watch case and in the direction of sliding of said body, such that the body is displaceable parallel to a longitudinal axis of said retaining stem, wherein the body cooperates with a spring arranged substantially parallel to said retaining stem and exerting as pretension force biasing the body used as a push button in a rest position, said retaining stem having a particular shape having in at least one predefined location along its longitudinal axis a reduced thickness in relationship to a reference thickness that presents the rest of the retaining stem the device comprising at least one attachment element adapted to be mounted at one end of said interchangeable watch bracelet and comprising a slot of a shape complementary to that of the retaining stem, the latter being adapted, depending on its position along said longitudinal axis, to cooperate with the attachment element or elements so as to allow said interchangeable watch bracelet to be attached to or to be removed from the watch case.

2. The device according to claim 1 , wherein said retaining stem comprises guiding flats in at least one predefined location, preferably in two predefined locations, such that the guiding flats are aligned with the slots of said attachment elements when the body used as a push button is activated and such that the guiding flats are at least partially offset from these slots when the body used as a push button is in its rest position.

3. The device according to claim 1 , wherein said retaining stem comprises a terminal element mounted on a free end, opposite to its end fixed to the body used as a push button, and enabling the body to be secured against any detachment from the watch case.

4. The device according to claim 1 , wherein said spring arranged substantially parallel to said retaining stem is fixed to a free end of a pin mounted on the body used as a push button and arranged parallel to said retaining stem.

5. The device according to claim 1 , wherein said spring arranged substantially parallel to said retaining stem is a helical spring.

6. The device according to claim 1 , wherein the slot of complementary shape on each attachment element is formed by a channel with a height corresponding to the reduced thickness of said retaining stem, this channel being adapted to allow said retaining stem, in the activated position of said body used as a push button, to pass through and opening to a through housing with a diameter corresponding to the reference thickness of said retaining stem, this through housing being adapted to receive said retaining stem in the rest position of said body used as a push button.

7. The device according to claim 1 , wherein each attachment element is arranged so as to receive a fastener of a watch bracelet, this fastener being mounted on the end of the attachment element opposite to its end comprising said slot.

8. The device according to claim 7 , wherein the fastening means is chosen from the group of fastening elements comprising a screwed bar, a spring bar, a screw.

9. The device according to claim 1 , wherein the attachment element is made of a substantially rectangular parallelepiped stud adapted to receive on its end, opposite from the end comprising a slot, a screwed bar.

10. The device according to claim 1 , wherein the attachment element is made by a single piece substantially in a T shape, the leg of the T forming the end of attachment element comprising the slot and the cross of the T forming the opposite end comprising a recess adapted to receive a spring bar.

11. The device according to claim 1 , wherein said body used as a push button is arranged so as to present, in its rest position, an external surface that is aligned and homogeneous with relation to the external surface of the watch case in which it is supposed to be integrated.

12. A watch case for wrist watches comprising a middle part, the two opposed lateral sides of which are arranged to receive an interchangeable watch bracelet, wherein the middle part comprises, on each of said two opposed lateral sides, a housing adapted to receive the body, the retaining stem, and the spring of a rapid attachment device according to claim 1 and at least one recess adapted to receive the attachment element or elements of said rapid attachment device.

13. The watch case according to claim 12 , wherein said housing adapted to receive the body, the retaining stem and the spring are oriented substantially perpendicularly with relation to the recesses adapted to receive the attachment element or elements.

14. An interchangeable watch bracelet, wherein it is arranged so as to be mounted onto a rapid attachment device according to claim 1 .

15. The watch bracelet according to claim 14 , wherein it is fabricated in a material chosen from the group comprising metals, such as steel, gold, titanium or aluminium, leather, rubber, synthetic materials, such as plastic.