SECURITY LOCK Russian patent published in 2008 - IPC G07F7/06 

FIELD: transport.

SUBSTANCE: invention relates to security lock (1) for a universal trolley to be jointed to another trolley, in particular to shopping trolley, incorporating a locking mechanism (2) to fix a jointing part (3) of the other trolley and coins bin (9) coin (50) or a counter to substitute for a coin. Note that, on dropping the coin (50), jointing part (3) gets disconnected from the other trolley jointing part and the coin is held on, while on leading the jointing part (3) in, coin (50) gets separated and jointing part (3) gets locked. Also, there is a spring-loaded two-shoulder (27) gadget (10) interacting with locking mechanism (2) and coins bin (9) to be moved by coin (5) against the spring force, while on leading the jointing part (3) supported by the spring in it moves in opposite direction. Note here that coins bins (31, 32) are arranged so that they do not identically act on the first coins bin (31). The spring force exceeds that acting on the second coins bin (32). The first coins bin (31) thrust on the second coins bin (32). Note also that on dropping coin (50), either only the first coins bin (31) moves, or the second coins bin (32) also moves, its travel being smaller than that of the first coins bin (31).

EFFECT: heightened efficiency of the device.

5 cl, 5 dwg