| 摘要 |
For sports footwear, a rack element connected to one side of the vamp of an article of footwear and engagable by a ring connected to a pull lever connected to the other side of the vamp, characterised by comprising:
- a substantially rectangular base (2) connected to one side of the vamp, its lower surface being provided with toothing (26) with a pitch of 2-3 mm,
- a fork (14) which embraces said base from below and having its arms (12) provided with holes (16) for engagement by a pivot pin (18) on which there is also pivoted a rack element (22) provided with at least one tooth (24) for engagement by the ring, the axis of the hole (20) of the rack element (22) having a distance (a) from its rear edge which is less than the distance (b) from its lower surface, the base (28) of the fork (14) being provided with a pawl (30) selectively engagable in one of the teeth of the toothing (26) of the base (2), said pawl having a depth not greater than the difference between the distances (a) and (b), the lateral surfaces of the arms (12) of the fork (14) being provided with pegs (32) interacting with the upper surface of the base (2) and forming pivotal axles for the fork (14) during the operation of the rack element (22),
- a spring (34) disposed about said pin (18) and which, in the absence of external stresses, maintains said tooth (24) engaged in the toothing (26) and maintains said rack element (22) urged against said base (2). |
