DE102013010199A1 - Lock and key system - Google Patents

Abstract

The invention relates to a lock and key system, comprising a lock cylinder, in the lock cylinder housing (10) of which a cylinder core (4) is rotatably mounted, which has a key channel for inserting a flat or reversible key (1), which has a longitudinal profile on the Side surfaces of the key shaft is provided. In the key shaft, a recess (13) is provided in the key back, in which a pearl-like control element (2), which is mounted on an axis (3) oriented in the longitudinal direction of the key shaft, is rotatably arranged and cooperates with a stylus, which in turn influences the movement of a blocking pin ,

Description

The invention relates to a lock and key system comprising a lock cylinder, in the lock cylinder housing a cylinder core is rotatably mounted, which has a keyway for inserting a flat or reversible key, which is provided with a longitudinal profiling on the side surfaces of the key shank.

In the conventional lock cylinders, with a cylinder core rotatably mounted in the cylinder housing, the tumblers are arranged to be displaced by the side profile of the key or the notches in the key-chest, this displacement to balance the housing and core tumblers at the parting plane between the cylinder core and the cylinder housing leads.

While the tumblers transgress this parting plane without an inserted key and thus prevent a rotation of the cylinder core, the cylinder core can be turned with a suitably coded key, thus triggering a closing process.

The prerequisite for this, however, is that the key can be inserted completely into the keyway so that all interacting notches, profile areas and tumblers are correctly aligned.

Manipulations of such a lock cylinder are possible with suitable tools, because this tool is generally completely inserted into the keyway.

The object of the invention is to secure a lock and key system of the type mentioned against tampering, taking into account the small existing in the cylinder core space. In addition, the copy protection should be increased.

• – dass im Schlüsselschaft eine vom Schlüsselrücken ausgehende Einfräsung vorgesehen ist,
• – dass in der Einfräsung, ein auf einer in Längsrichtung des Schlüsselschaftes ausgerichteten Achse gelagertes perlenartiges Steuerglied drehbar angeordnet ist,
• – dass die Bohrung des perlenartigen Steuerglieds, die die Achse aufnimmt, derart bemessen ist, dass sich das perlenartige Steuerglied um die Achse herum und radial zur Achse mit Spiel bewegen kann,
• – dass seitlich des Schlüsselkanals eine Bohrung, parallel zur Schlüsselschaftebene, im Zylinderkern vorgesehen ist, in der ein federbelasteter, hantelartiger Taststift durch Zusammenwirken mit dem perlenartigen Steuerglied verschiebbar ist,
• – dass der Taststift mit einem senkrecht dazu verschiebbaren Blockierstift zusammenwirkt, der von den hantelartigen Köpfen des Taststiftes bei dessen Verschiebung, in eine Sperrleistennut im Schließzylindergehäuse druckbar ist, um die Drehung des Zylinderkernes zu verhindern, während der Blockierstift aus der Sperrleistennut bei Drehung des Zylinderkernes druckbar ist, wenn dem Blockierstift der Steg zwischen den Hantelköpfen des Taststiftes zugewandt ist.

This object is achieved according to the invention with a lock and key system comprising a lock cylinder, in the lock cylinder housing a cylinder core is rotatably mounted, which has a keyway for inserting a flat or reversible key, which is provided with a longitudinal profiling on the side surfaces of the key shank, thereby,

• - That in the key shank outgoing from the key back milling is provided
• In that a bead-like control member supported on an axis oriented in the longitudinal direction of the key shank is rotatably arranged in the milling groove,
• - That the bore of the bead-like control member which receives the axis, is dimensioned such that the bead-like control member can move around the axis and radially to the axis with play,
• - That the side of the keyway a bore, parallel to the key shaft plane, is provided in the cylinder core, in which a spring-loaded, dumbbell-like stylus is displaceable by cooperation with the bead-like control member,
• - That the stylus cooperates with a vertically displaceable blocking pin which is printable by the dumbbell-like heads of the stylus during its displacement, in a Sperrleistennut in the lock cylinder housing to prevent the rotation of the cylinder core, while the blocking pin from the Sperrleistennut upon rotation of the cylinder core printable is when the blocking pin, the web faces between the dumbbell heads of the stylus.

Preferably further developments emerge from the subclaims.

The solution according to the invention has a number of advantages.

In particular, the bead-like control member can be introduced at different positions in the key (near the spine). This solution is largely independent of the profile and can therefore be used with reversible keys.

The system is also largely secured against manipulation and is of particular importance that reworkability is significantly more difficult, because it requires, for example, for the production of the control member assembly and function special tools and procedures that are not available in the usual reworking by milling.

The invention will be explained in more detail below using an exemplary embodiment.

Showing:

1 a schematic side view of a key with the bead-like control member,

1a a cross section along AA,

2 a key partially inserted into a lock cylinder,

2a and 2 B Cuts according to BB or CC,

3 and 3a a section according to DD in 3 ,

In the key 1 is located from the back of the key a milling 13 in which the pearly control member 2 on an axis arranged in the longitudinal direction of the key shank 3 located. The diameter in the bore of the bead-like control member is significantly larger than the axle diameter, so that the control member can rotate and move radially freely.

In the cylinder core 4 is a guideway from "above" 5 milled, on which the bead-like control member is guided during insertion of the key along.

The paracentric profile features direct the bead-like control element up to a - in the upper area - conical, dumbbell-like stylus 6 which is then pressed down by the bead-like control member upon insertion of the key.

Since the paracentric profile features are not completely milled away, results in a waveform of the guideway, as in the 2a can be seen.

2 to 2 B : The key is not fully inserted. The conical stylus 6 is by a spring 8th pressed "up" to the lock cylinder housing ( 2 B ).

In this position, the stylus blocks 6 , which is designed like a dumbbell - with dumbbell heads 17 and footbridge 16 - the blocking pin 7 who is in the Sperrleistennut 9 of the lock cylinder housing 10 prevents the core rotation.

Is the key fully inserted ( 3 and 3a ), then becomes the pearl-like control element 2 is through the milled track 5 so deflected that it's the stylus 6 pushes down over its conical end.

This will be the blocking pin 7 released, ie the blocking pin 7 can in between the dumbbell heads 17 existing footbridge 16 of the dumbbell-like stylus 6 and thus the cylinder core 4 immerse in the core rotation.

Through the slopes 11 . 12 between lower dumbbell head and bridge 16 becomes the locking pin 7 when pulling out the key 1 back to its blocking position ( 2 B ) brought.

In the illustrated embodiment, only a bead-like control member has been shown.

By a multiple arrangement with a corresponding plurality of styli and the course associated locking pins, the security can be further increased.

Claims (7)

Lock-key system comprising a lock cylinder, in the lock cylinder housing ( 10 ) a cylinder core ( 4 ) is rotatably mounted, the a keyway for inserting a flat or reversible key ( 1 ), which is provided with a longitudinal profiling on the side surfaces of the key shank, characterized in that - in the key shank an outgoing from the key back milling ( 13 ), - that in the milling ( 13 ), an axis oriented in the longitudinal direction of the key shank ( 3 ) stored bead-like control member ( 2 ) is rotatably arranged, - that the bore ( 14 ) of the bead-like control member ( 2 ), which is the axis ( 13 ) is dimensioned such that the bead-like control member ( 2 ) around the axis ( 13 ) around and radially to the axis can move with play, - that the side of the keyway a bore ( 15 ), parallel to the key level, in the cylinder core ( 4 ) is provided, in which a spring-loaded, dumbbell-like stylus ( 6 ) by interaction with the pearly control member ( 2 ) is displaceable, - that the stylus ( 6 ) with a vertically displaceable blocking pin ( 7 ), which is supported by the dumbbell-like heads ( 17 ) of the stylus ( 6 ), in its displacement, in a Sperrleistennut ( 9 ) in the lock cylinder housing ( 10 ) is pressed to the rotation of the cylinder core ( 4 ) while the blocking pin ( 7 ) from the Sperrleistennut ( 9 ) upon rotation of the cylinder core ( 4 ) can be pressed when the blocking pin ( 7 ) the bridge ( 16 ) between the dumbbell heads ( 17 ) of the stylus ( 6 ) is facing. Lock-key system according to claim 1, characterized in that the stylus is formed conically in its engageable with the bead-like control member region, forming a sliding surface. Lock-key system according to one of the preceding claims, characterized in that in the keyway of the cylinder core ( 4 ) a guideway ( 5 ) for the pearly control member ( 2 ) is provided Lock-key system according to one of the preceding claims, characterized in that the dumbbell-like stylus ( 6 ) by a spring ( 8th ) up against the lock cylinder housing ( 10 ) is depressible. Lock-key system according to one of the preceding claims, characterized that more than one bead-like control member and correspondingly a plurality of styli along the shaft length and cylinder core extension are provided. Lock-key system according to claim 5, characterized in that the bead-like control members have different dimensions. Lock-key system according to one of the preceding claims, characterized in that the guide track for the bead-like control member is formed in the lock cylinder housing.

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