Patent ID: 6523377
Filing Date: 2003-02-25
Classification: E05B,H02K,Y10T

Abstract:
Blocking device for a cylinder lock (1) with a stator (9), a rotor (10) rotatable in this stator (9) by means of a key (2), an additional blocking element (13) engagable and disengagable linearly along a displacement axis in the rotor (10), and an electrically driven control means (14) for actuating this blocking element (13), with the control means (14) comprising a rotating driven end of a shaft (15), a helical drive unit (16) disposed between the control means (14) and the blocking element (13), as well as an electronic control device (17) for generating control signals for the control means (14), characterized in that the driven end of the shaft (15) of the control means (14), the rotational axis of helical drive unit (16) as well as the blocking element (13; 13â€²; 13â€³) and its linear guidance (20) are disposed on a common longitudinal axis (18), a first portion of the helical drive unit (16) is equipped with a helical groove (39; 61; 65), with this helical groove (39; 61; 65) being disposed on a shell surface about the common longitudinal axis (18), the helical groove (39; 61; 65) having in the direction of the longitudinal axis (18) a span of limited length and with predetermined positive pitch (52), with an end region (46, 45) of the groove (39; 61; 65) being assigned to the blocking position of the blocking element (13; 13â€²; 13â€³) and the other end region (45, 46) of the groove (39; 61; 65) to the opening position of blocking element (13; 13â€²; 13â€³) on at least the end region (46, 45) assigned to the blocking position, of the helical groove (39; 61; 65) a longitudinal element (47, 48) of the groove (39; 61; 65) is disposed which does not have a pitch, both ends of groove (39; 61; 65) are terminated with stop faces (40, 41), a second portion of the helical drive unit (16) has a slide element (43; 58; 68) extending into the helical groove (39) and a first portion (36; 59) or a second portion (66) of the helical drive unit (16) is fixedly connected with the blocking element (13; 13â€²; 13â€³).