| 摘要 |
PCT No. PCT/CH81/00098 Sec. 371 Date Apr. 22, 1982 Sec. 102(e) Date Apr. 22, 1982 PCT Filed Aug. 28, 1981 PCT Pub. No. WO82/00751 PCT Pub. Date Mar. 18, 1982.A U-shaped part (1) of which the two parallel branches (1a, 1b) may slide in corresponding grooves (9a, 9b) of a casing, forms a key receiver ring. In a chamber (13) of the casing (2) there is provided a mechanism comprising an oscillating part (3) provided with a spring blade (11) and having a series of notches (14) forming latch locks. The free end of the longer branch (1b) of the U-shaped part (11) is provided with a bolt (4). A maneuver button (10) allows to oscillate the oscillating part (3) against the action of its spring (11) to disengage the bolt (4) of the latch lock (14) where the spring was keeping it engaged, thereby allowing to disengage from the casing (2) the shorter branch (1a) of the U and to bring the bolt (4) selectively facing one of the latch locks (14) so that the length of the portion of the ring (1) being outside the casing corresponds to the number of the keys engaged on that portion. By releasing the button (10), the spring (11) produces the cooperation between the bolt (4) and the latch lock (14) thereby locking the ring (1) on the casing (2).
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