EP0230807A1 - Cylinder lock with identical tumblers - Google Patents

Abstract

1. A cylinde lock with tumblers, comprising a plurality of tumblers (1) sliding radially in a rotor (2) under the action of a toothed key (5), the teeth co-operating with the edge of a cut-out on each tumbler to return the tumblers to the inside of the rotor, said tumblers each being subjected to the action of a spring (3), returning them towards the exterior of the rotor, characterised in that the tumblers are identical, and that in each tumbler a cut-out is provided on each lateral edge parallel to the direction of sliding, in such a way that each tumbler comprises two lateral cut-outs, each providing two edges (8, 8', 8", 8"') for co-operating with the teeth (7) of the key (5), at least some of the four edges (8, 8', 8", 8"') formed in this way being at different distances from the transverse axis (Z-Z') of the tumbler (1), but at the same distance from the longitudinal axis (X-Y) of the tumbler (1).

Description

The flanged cylinder lock with a flat key control is probably the dominant lock on the world market.

Compared to the so-called piston lock, it has many advantages: cheaper, easy to manufacture, it has fewer parts and lends itself easily to automatic assembly.

By cons, it is quite easy to crochet due to the poor guiding of the flakes, and the offset of the spring relative to the axis of the barrel.

On the other hand, the management of different flakes poses problems in terms of necessarily diversified tools.

Avoid any risk of mixing between the different flakes during storage and handling. Automatic assembly machines are complicated by the fact that as many different elements are required as there are different flakes per barrel.

The present invention aims to improve glitter locks by using a unique type of glitter which, depending on its position, allows different combinations to be obtained.

To this end, the subject of the invention is a cylindrical glitter lock, comprising a plurality of glitters sliding radially in a rotor under the action of a notched key cooperating by its notching with an edge of a notch in each glitter for return the flakes inside the rotor, said flakes each being subjected to the action of a spring bringing them back towards the outside of the rotor, characterized in that the flakes are of a single type and comprise two lateral notches each providing two edges intended to cooperate with the notching of the key, the four edges thus formed being for at least some at different distances from the transverse axis of the straw but at the same distance from the longitudinal axis of the glitter.

Thus, when the distances of the four notch edges to the transverse axis are different, it is possible to obtain four different notch depths for the combination, by making the spangle occupy four angular positions offset successively by 90 °.

Advantageously, the return spring of the straw is coaxial with the longitudinal axis and the straw comprises two axial longitudinal notches opposite to receive said spring.

• - la figure 1 est une vue schématique en coupe transversale d'un rotor de serrure selon un exemple de réalisation de l'invention, et
• - la figure 2 est une vue schématique en plan du rotor de la figure 1.

The invention will be clearly understood on reading the following description made with reference to the appended drawing in which:

• FIG. 1 is a schematic view in cross section of a lock rotor according to an exemplary embodiment of the invention, and
• - Figure 2 is a schematic plan view of the rotor of Figure 1.

The universal flakes 1 are slidably mounted radially in a slot 9 of a rotor 2. The flakes 1 being put in place, are held in the rotor 2 by means of an axial stop 6. The locking of the flakes 1 is obtained by the thrust of the springs 3 which bear on the straw 1 on the one hand, and on a retaining slide 4 on the other hand, and are housed in passages 10.

Unlike the conventional solution, the key 5 is located not in the axis of the barrel, but on one side.

This arrangement allows on the one hand, to use a straw with a constant width A (better guidance). On the other hand, it also allows a symmetrical design of the straw, which can rotate 180 ° relative to the axis X - Y, or 180 ° relative to the axis Z - Zʹ.

The sides 8, 8ʹ, 8ʺ, 8 ‴ are variable so that by turning the flake along the axis X - Y or Z - Zʹ or according to both, the notch of the key 7 is brought into contact with the notch 8, 8ʹ, 8ʺ, 8 ‴ corresponding to the glitter.

Thus, a single glitter is equivalent to 4 glitters.

The device for automatic assembly of a barrel is much simplified: a single vibrating bowl (instead of 4) feeds a clamp, where the glitter appears, always in the same way. The programmed rotation of 180 ° along the X - Y axis positions the notch chosen along this axis.

On the other hand, the barrel is programmed to move this according to the determined pitch and undergoes a rotation (if necessary) of 180 ° along the axis Z - Zʹ.

Claims (2)

1. - Cylindrical glitter lock, comprising a plurality of flakes sliding radially in a rotor under the action of a notched key cooperating by its notching with an edge of a notch in each flake to bring the flakes inside the rotor, said flakes being each subjected to the action of a spring bringing them back towards the outside of the rotor, characterized in that the flakes (1) are of a single type and comprise two lateral notches each providing two edges ( 8, 8ʹ, 8ʺ, 8 ‴) intended to cooperate with the notch (7) of the key (5), the four edges (8, 8ʹ, 8ʺ, 8 ‴) thus formed being for at least some at distances different from the transverse axis (Z-Zʹ) of the straw (1) but at the same distance from the longitudinal axis (XY) of the straw (1). 2. - Lock according to claim 1, characterized in that the return spring (3) of the straw (1) is coaxial with the longitudinal axis (XY) and the straw (1) comprises two axial longitudinal notches (10 ) opposite to receive said spring (3).

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