US 2007/0006623 A1Published application

Cylinder lock

OwnerGunter Barrenberg, Matthias Lowinventors

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Abstract

The cylinder lock is comprised of a cylinder housing (10.1) and of a cylinder core (20.1), which is mounted therein and which accommodates spring-loaded plate-shaped tumblers (31.1) that can be longitudinal placed therein. The plate longitudinal edges (30.1, 30.2) of the tumblers are then guided on guiding surfaces (21.1, 22.1) inside the cylinder core (20.1). The tumblers (31.1) have control edges (41.1) placed at defined heights (45). The aim of the invention is to render the cylinder lock not only burglar-proof, but to also ensure a reliable protection against the loss of tumblers. To this end, the invention firstly provides that a cam (36.1) having a least one pair of flanks (37.1, 38.1) is placed either on one plate longitudinal edge (30.1) of the tumblers (31.1) or on the guiding surface in the cylinder core facing said plate longitudinal edge. The invention also provides that a cutout (26.1) is made either on the cylinder core (20.1) next to its cavity (23.1) for tumbler (31.1) or the cutout is made on the tumbler itself on its plate longitudinal edge facing the cam. Said cutout has at least one pair of mating flanks (27.1, 28.1) and is opposite the cam-side flanks (37.1, 38.1). The flanks and mating flanks (27.1, 37.1) function as a stop and counter sop for concealing the actual position of the control edges. At the same time, at least one flank and mating flank (27.1, 37.1) provide for a protection against the loss of tumblers, which provides for a holding together of the modular unit, which consists of the spring-loaded (13.1) tumblers (31.1) and of the cylinder core (20.1), even when the modular unit is located outside of the cylinder housing (10.1).

Lock cylinder consisting of a cylinder housing (10.3;

10.4) and a cylinder core (20.3;
20.4), which is supported (11) rotatably in the housing,
a key with a defined longitudinal profile being assigned to the core,
with a group of diametric shafts (23.3;
23.4) arranged in a row in the axial direction of the cylinder core (20.3;
20.4),
which hold plate-shaped tumblers (31.3-34.3;
31.4-33.4), the longitudinal edges (30.1;
30.2) of which are free to slide longitudinally along guide surfaces (21;
21) of the shaft (23.3), the tumblers also being spring-loaded (13.3;
13.4) in one of the two directions of their movement;
where each tumbler (31.3-34.3;
31.4-34.4) has a control edge (41.3-44.3;
41.4-43.4) in correspondence with the longitudinal profile of the key, each control edge being located at a defined height;
with a radial opening (61.3;
61.4) in the cylinder core (20.3;
20.4) and an insert (62.3;
62.4), which can be inserted into the opening;
the outer end (63.3;
63.4) of which insert does not project beyond the external contour of the cylinder core (20.3;
20.4) after its insertion, whereas the inner end (64.3;
64.4) engages in a cutout (36.3;
36.4) in the facing edge of the longitudinal plate edge (30.2) of the tumbler (31.3-34.3;
31.4-34.4);
as a result of which the spring-loaded tumblers (31.3-34.3;
31.4-34.4) are secured in the cylinder core (20.3;
20.4) before the core is installed in the housing (10.3;
10.4) and thus a loss-prevention function is provided;
wherein
the insert consists of a comb-like body (comb 62.3;
62.4) with teeth (36.3, 36.3;
36.4, 36.4′), the inner ends (64.3;
64.4) of which have a profile with at least one pair of oppositely-facing flanks (flank pair 37.3a/38.3a, 37.31/38.3i;
37.4/38.4, 37.4′/38.4′);
whereas the cutouts (26.3;
26.4) in the tumblers (31.3-34.3;
31.4-34.4) have at least one pair of opposing flanks (opposing flank pair 27.3a/28.3a;
27.3i/28.3i;
27.4a/28.4a;
27.4i/28.4i), which are in different positions on the tumblers (31.3-34.3;
31.4-34.4) which have their control edges (41.3-44.3;
41.4-43.4) at different heights;
in that
the flank pairs (37.3a/38.3a, 37.3i/38.3i;
37.4/38.4, 37.4′/38.4′) and the opposing flank pairs (27.3a/28.3a, 27.3i/28.3i;
27.4a/28.4a, 27.4i/28.4i) are arranged in such a way that, after the comb (62.3;
62.4) has been inserted and the key has been withdrawn, the control edges (41.3-44.3;
41.4-43.4) of at least two tumblers (31.3-34.3;
31.4-34.4) are at the same height (50.4, 60.3, 60.4;
50.5, 60.5, 60.6), which thus conceals the actual position of the control edges (41.3-44.3;
41.4-43.4),
when, in the rest position of the spring-loaded (13.3;
13.4) tumblers (31.3-34.3;
31.4-34.4), one of the flanks (38.3i) rests against one of the opposing flanks (28.3i) and/or
when, in an actuated position, after maximum displacement (77) of the tumblers (31.3-34.3;
31.4-34.4) by a lock-picking tool, the other flank (37.3i) meets the other opposing flank (27.3i).

53 more elements

Abstract

Claims30