Bracelet clasp

1. A bracelet clasp with a deployant buckle including a substantially rectangular base element whose first and second long sides are respectively formed of first and second side bars, and first and second pivoting folding parts hinged respectively on first and second small sides of said base element, said folding parts being arranged to be folded down onto said base element and held there in response to an elastic device associated with a locking and unlocking mechanism acting on said base element and said folding parts to respectively allow said first and second folding parts to be locked onto said base element and then disengaged therefrom, wherein the first and second side bars are each formed of at least two leaf springs which form said elastic device, a pressure simultaneously exerted on each of the side bars causing the unlocking of said folding parts from said base element.

2. The clasp according to claim 1 , wherein the locking and unlocking mechanism is formed of first and second hooks carried by the free end of the first folding part and third and fourth hooks carried by the free end of the second folding part, said first and third hooks being arranged to be respectively locked by first and second locks carried by said first side bar and said second and fourth hooks being arranged to be respectively locked by third and fourth locks carried by said second side bar.

3. The clasp according to claim 1 , wherein the first and second side bars respectively carry first and second push-pieces.

4. The clasp according to claim 1 , wherein said leaf springs each forming said first and second side bars are contiguously mounted.

5. The clasp according to claim 1 , wherein said leaf springs each forming said first and second side bars are separated by solid spacers.

6. The clasp according to claim 1 , wherein a first bracelet strand is fixed to the free end of said first folding part and a second bracelet strand is fixed to the free end of said second folding part.

7. A bracelet clasp with a deployant buckle including a substantially rectangular base element whose first and second long sides are respectively formed of first and second rigid arms, and a pivoting folding part hinged on one of first and second small sides of said base element, said folding part including first and second side bars, said folding part being arranged to be folded down onto said base element and held there in response to an elastic device associated with a locking and unlocking mechanism acting on said base element and said folding part to respectively allow said folding part to be locked onto said base element and then disengaged therefrom, wherein the first and second side bars are each formed of at least two leaf springs which form said elastic device, a pressure simultaneously exerted on each of the side bars causing the unlocking of said folding part from said base element.

8. The clasp according to claim 7 , wherein the locking and unlocking mechanism is formed of first and second hooks respectively carried towards the free end of said first and second rigid arms, said first and second hooks being arranged to be locked respectively by first and second locks carried respectively by said first and second side bars.

9. The clasp according to claim 7 , wherein the first and second side bars respectively carry first and second push-pieces.

10. The clasp according to claim 7 , wherein the leaf springs each forming the first and second side bars are contiguously mounted.

11. The clasp according to claim 7 , wherein the leaf springs each forming the first and second side bars are separated by solid spacers.

12. The clasp according to claim 7 , wherein a first bracelet strand is fixed to the free end of the folding part and a second bracelet strand is fixed to the free end of the base element.