EP1884609A1 - Anti manipulation arrangement against impact technique - Google Patents

Abstract

The lock cylinder has a locking pin arranged in a mounting hole and moving in a rotational position in a profile channel from the mounting hole into another mounting hole. The locking pin is fixed on an interface level of the mounting holes. The locking pin is dumbbell-shaped, and each side of two mushroom-shaped pin ends is provided with manipulation attempts in the two mounting holes.

Description

The invention relates to a lock cylinder, they know for example for locks are used. Such lock cylinders have a housing with a substantially cylindrical receiving space in which a cylinder core secured by means of spring-loaded core and housing pins against radial movement, is rotatably mounted. The cylinder core has an axial profile channel into which a key can be inserted. Radially and axially parallel to the profile channel, first mounting bores extend up to the lateral surface of the cylinder core. In the secured rotational position are in the escape of the first mounting holes of the cylinder cores in the housing also second, to the receiving space open receiving bores formed.
In the secured rotational position of the cylinder core prevent housing locking pins a rotation of the cylinder core in that they are each with a defined share in both the first and second receiving bore. When inserted in the profile channel, proper key the core locking pins are moved radially so that their end is flush with the lateral surface of the core. The housing locking pins are thus with their entire length in the second receiving bore, so that the cylinder core can be rotated in the receiving space. Such lock cylinders have prevailed in practice and are relatively tamper-proof, since it is quite difficult without zughörigen key to align the core locking pins simultaneously on the lateral surface. However, an absolute protection against manipulation of the lock cylinder in question is not given, so that the industry's endeavor is to prevent twisting of the cylinder core without an associated key.

Out FR 2 312 630 A1 a lock cylinder is known according to this endeavor. However, the mechanism which is intended to prevent twisting during manipulation is externally reversible.

Out US 3,802,234 is also known a lock cylinder, which has features that prevent tampering. However, these require a variety of items, which adversely affects the manufacturing cost.

Out DE 199 34 883 C1 is a lock cylinder known, which indeed detects a manipulation, but ultimately not necessarily prevented.

The invention is therefore based on the object to develop a lock cylinder, the with economic manufacturability in the case of manipulation prevents twisting of the cylinder core. To solve this problem, a closure device according to claim 1 is proposed with the invention. The lock cylinder according to the invention has in its housing at least a third, smaller diameter receiving bore which is parallel to the second receiving holes also open to the receiving space. This third mounting hole is aligned with a defined twisted cylinder core (second rotational position) with one of the first mounting holes. In the third mounting hole is a dumbbell-shaped locking pin which is pressed spring-loaded in the direction of the cylinder core, and thus rests against the lateral surface of this. If the cylinder core now brought by manipulation, ie without the associated key in the second rotational position, the locking pin is transported by spring force from the third Aufnahmeborhung in the first receiving bore. At the end of this process is the waisted shape of the locking pin on the parting plane (lateral surface of the cylinder core) of the receiving bores one and three. Due to the different diameter of the mounting holes one and three and the dumbbell-shaped configuration of the locking pins, these can not be moved simultaneously from the mounting holes one. Thus, in a lock cylinder of such a shape, manipulative opening attempts are prevented insofar as the rotation of the cylinder core at the rotational position two is blocked.

• Fig. 1: eine Darstellung eines Schließzylinders im Längsschnitt im Verriegelungszustand ohne Schlüssel
• Fig. 2: den Schließzylinder wie in Fig. 1, jedoch mit eingeführtem Schlüssel,
• Fig. 3: einen Schnitt durch die Schließvorrichtung entlang der Linie III-III der Fig. 1 ohne eingeführten Schlüssel
• Fig. 4: einen Schnitt durch den Schließzylinder entlang der Linie V-V der Fig. 2 mit eingeführten Schlüssel
• Fig. 5. einen Schnitt durch den Schließzylinder entlang der Linie V-V der Fig. 2 mit eingeführten Schlüssel in Drehstellung 2
• Fig. 6: einen Schnitt durch den Schließzylinder entlang der Linie III-III der Fig. 1 im Moment der Manipulation,
• Fig. 7: die irreversible Drehblockierung des Zylinderkerns durch den Sperrstift nach erfolgreicher Manipulation.

The invention will be explained in more detail with reference to the drawings. In detail show:

• Fig. 1: an illustration of a lock cylinder in longitudinal section in the locked state without a key
• 2 shows the lock cylinder as in FIG. 1, but with inserted key,
• 3 shows a section through the locking device along the line III-III of FIG. 1 without inserted key
• 4 shows a section through the lock cylinder along the line VV of FIG. 2 with inserted key
• 5 shows a section through the lock cylinder along the line VV of FIG. 2 with inserted key in rotational position. 2
• 6 shows a section through the lock cylinder along the line III-III of Figure 1 at the moment of manipulation.
• Fig. 7: the irreversible rotational blocking of the cylinder core by the locking pin after successful manipulation.

Claims (4)

Lock cylinder with - a housing - a cylinder core - At least a first receiving bore - At least a second receiving bore - At least a third receiving bore a blocking pin which is arranged in the third receiving bore and, in the second rotational position, when the key is not in the profile channel, moves from the third receiving bore into the first receiving bore and is thereby fixed on the dividing plane of both receiving bores, characterized, - That the locking pin is designed dumbbell-shaped, whereby each one side of the two mushroom-shaped pin ends is in a tampering attempts both in the receiving bore one and the receiving bore two. Lock cylinder according to claim 1, characterized in that the third receiving bore in the transverse direction of the lock cylinder is aligned with the second receiving bore. Lock cylinder according to claim 1 or 2, characterized in that the housing has at least two third receiving bores, each with a spring-loaded locking pin, which are arranged mirrored to the receiving bore two. Lock cylinder according to one of claims 1 to 3, characterized in that the outlet of the receiving bore 2 to the receiving space forms a parabola.

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