EP1861569A2

EP1861569A2 - Lock cylinder

Info

Publication number: EP1861569A2
Application number: EP05850161A
Authority: EP
Inventors: Thomas Pechmann
Original assignee: Schliessanlagen Pfaffenhain GmbH
Current assignee: ABUS Pfaffenhain GmbH
Priority date: 2004-12-23
Filing date: 2005-12-16
Publication date: 2007-12-05
Anticipated expiration: 2025-12-16
Also published as: ES2340944T3; WO2006066549A2; DE102004063395A1; WO2006066549A3; PL1861569T3; EP1861569B1; ATE457399T1; DE502005009016D1

Abstract

The invention relates to a lock cylinder which comprises a cylinder housing with a rotatably mounted cylinder core through which a plurality of locking bores radially extend. The aim of the invention is to provide a durable and reliable lock cylinder that can effectively withstand impact striking and yet is hardly susceptible to wear. For this purpose, at least the longest core pin (66) has a conical projection (10) and is arranged, together with a housing pin (86), in a common locking bore (56). Said housing pin (86) does not correspond to the shortest housing pin (83) that is present in one of the other locking bores (51 to 56) and has a projection (11) with a smaller diameter.

Description

lock cylinder

The invention relates to a lock cylinder consisting of a cylinder housing with a rotatably mounted cylinder core, which include a plurality of radially extending tumbler holes, in which for optional rotational release or

Drehblockierung of Zyiinderkerns relative to the cylinder housing in each case a core pin and a housing pin loaded by a spring are guided displaceably, wherein the

Core pin is designed engageable in a keyway of the cylinder core and at least one of the core pins and one of the housing pins at its end facing the other pin has a smaller diameter approach.

Such a solution is known from DE 103 16 327 A1. In this case, both the core pins and the housing pins are provided at their mutually facing end with a smaller diameter approach in all of the tumbler holes. This is to ensure that misalignment and / or burr at the edges between the tumbler bores located in the cylinder core and in the cylinder housing can not interfere with rotational blocking of the Zyiinderkerns. Although this document does not contain any reference to the more detail below Schlagpicken, it is generally conceivable to use this solution also to suppress this usually used by unauthorized break-open method.

For example, lock cylinders based on pin tumblers without special precautions can be opened without locking key. For this a special impact key is used. The impact wrench is positioned so that it can transmit to the pin tumblers upon application of a pulse which is axially parallel to the cylinder core axis of rotation. Before executing the opening attempt, the escape of the tumbler bores between cylinder core and cylinder housing is largely eliminated. If the aforementioned impulse acts on the components of the lock cylinder, the core and housing pins are displaced against the force of the spring. The generated slight misalignment of the tumbler bores of the core and housing pins causes the core pins to catch on the projecting edge of the tumbler bore of the housing pin, and thus in the closing plane, as the housing pins continue to move. As soon as all the core pins have reached the closing plane (core rotary joint), the cylinder core can be rotated relative to the cylinder housing and the locking cylinder can be subsequently reconnected. Since with lock cylinders the housing pins guided in the respective tumbler bores - if necessary also the core pins - have a different length to ensure a high locking security, it is disadvantageous in the case of the abovementioned solution that the shorter core and housing pins also have a smaller diameter approach must be provided. Regularly and objectively conditioned, however, the ratio between the guide length, diameter and clearance in these areas is anyway in a range which can not be further shifted without adversely affecting the wear behavior and thus the service life and reliability of the lock cylinder would.

The object of the invention is to propose a lock cylinder, which can effectively resist an impact pick, but still has a low susceptibility to wear and thus a long life and reliability.

This object is achieved in a generic lock cylinder with the features specified in the characterizing part of claim 1.

The advantages of the invention are that a punching of the lock cylinder can be effectively prevented without the ratio between the guide length, diameter and clearance of the core and housing pins is significantly impaired, creating a secured against picking, a low susceptibility to wear and thus a high durability and reliability locking cylinder is provided.

Advantageous developments of the invention are apparent from claims 2 to 5.

The invention will be explained in more detail below using an exemplary embodiment and associated drawings. Show it:

Fig. 1 is a partially sectioned side view of a lock cylinder according to the invention without a key

Fig. 2 is a partially sectioned side view of a lock cylinder according to the invention in a position in which the impact wrench for Introduction of a shock pulse has been prepared

Fig. 3 is a sectional view of the lock cylinder according to the invention along the line A - A of Fig. 2, but the core pin 6 ⁶ and the housing pin 8 ⁶ in the tumbler bore 5 ⁶ have been moved radially from the percussion key

Fig. 4 is a sectional view of the lock cylinder according to the invention along the line B - B of Fig. 2, but the core pin 6 ¹ and the housing pin 8 ¹ in the tumbler bore 5 ¹ have been moved radially from the percussion key

Fig. 5 is a sectional view of the lock cylinder according to the invention along the line C - C of Fig. 2, but the Kemstift 6 ³ and the housing pin 8 ³ have been moved radially in the tumbler hole 5 ³ from the beating key

In Fig. 1, an inventive lock cylinder 1 is shown in the form of a double cylinder. This has two interconnected via a profiled web 2 cylinder housing 3, which serve for the rotatable mounting of a cylinder core 4. To simplify the drawing, only the left side of the lock cylinder 1 is shown in section and will be described below. In the cylinder housing 3 and cylinder core 4 are a plurality of radially extending tumbler bores 5 ¹ to 5 ⁶ located in which the optional rotational release (in conjunction with the authorized key) or rotation blocking (after removing this key) of the cylinder core 4 relative to the cylinder housing 3 each have a core pin. 6 ¹ to 6 ⁶ and one of a spring 7 loaded housing pin 8 ¹ to 8 ^{6 are} guided displaceably, each of these core pins 6 ¹ to 6 ⁶ in a key channel 9 of the cylinder core 4 is designed engageable. The two longest and in the tumbler bores 5 ⁴ , 5 ⁶ located core pins 6 ⁴ , 6 ⁶ are provided at their the respective housing pin 8 ⁴ , 8 ⁶ facing the end with a frustoconical design approach 10. These core pins 6 ⁴ , 6 ⁶ cooperate with housing pins 8 ⁴ , 8 ⁶ , which are cylindrical in shape thus have no projections or recesses. The other, in the tumbler holes 5 \ 5 ² , 5 ^{5 out} and compared to the core pins 6 ⁴ , 6 ⁶ shorter designed core pins 6 \ 6 ² , 6 ⁵ are in turn Housing pins 8 ¹ , 8 ² , 8 associated with ⁵ , which also have a continuous cylindrical shape.

In addition, the provided in the tumbler hole 5 ³ core pin 6 ³ , which is not the longest of the core pins and thus also does not have a frustoconical projection 10, a housing pin 8 ³ assigned, in which at least the Kemstift 6 ³ facing end has a smaller diameter approach 11 , The other end of this housing pin 8 ³ may carry a similar smaller diameter approach 11 and further include an annular recess 12. This ensures that these pins are suitable for automated assembly without additional expense. The central annular recess is deceptive when using other, known

Picking methods a closing level by tilting before.

Below, the operation of the lock cylinder according to the invention will be explained:

Is introduced starting from Fig. 1 in the bowl channel 9 of the cylinder core 4, not shown authorized key, the touching core pins 6 ¹ to 6 ⁶ and housing pins 8 ¹ to 8 ⁶ , at this point a common parting plane 13 ¹ to 13 ⁶ , from the notches of the key in the tumbler bores 5 ¹ to 5 ⁶ shifted so far, until each of these parting planes 13 ¹ to 13 ⁶ in the area between the cylinder housing 3 and cylinder core 4 Kemdrehfuge 14 comes to rest, so that now the cylinder core 4 can be rotated relative to the cylinder housing 3.

If, on the other hand, a so-called impact key 15 is positioned in the keyway 9 of the cylinder core 4, as mentioned above, then the components of the lock cylinder 1 are in a still rotationally blocked position, as shown in FIG. After by appropriate measures the given escape of Zuhaltungsbohrungen 5 ¹ to 5 ^{6 is} lifted in the cylinder core 4 to those in the cylinder housing 3, now protrudes an edge of each tumbler for the housing pin 8 ¹ to 8 ⁶ in the trajectory of the core pin 6 ¹ to 6 ⁶ , A parallel to the cylinder core axis of rotation (arrow A) on the complete system of the core pins 6 ¹ to 6 ⁶ , springs 7 and housing pins 8 ¹ to 8 ⁶ acting pulse causes a radial, against the force of Springs 7 directed displacement of all core pins 6 ¹ to 6 ⁶ and housing pins 8 ¹ to 8 ⁶ . In this case, the parting planes 13 ⁴ , 13 ⁶ between the longest core pins 6 ⁴ , 6 ⁶ and the associated housing pins 5 ⁴ , 5 ^{6 reach} the region of the core rotary joint 14 (FIG. 3) located between the cylinder housing 3 and cylinder core 4, before the shorter core pins 6 ¹ to 6 ³ , 6 ⁵ penetration of the tumbler holes 5 ¹ to 5 ³ , 5 ^{5 of} the cylinder housing 3 is thereby prevented by the caused by the component play in conjunction with the imposed bias slight offset of the tumbler holes 8 ¹ to 8 ³ , 8 ⁵ causes the core pins 6 ¹ to 6 ^3, 6 ⁵ hanging on the protruding edge of the respective Zuhaltungsbohrung 5 ¹ to 5 ^3, 5, ⁵ of the housing pin 8 ¹ to 8 ^3, 8 ^5, and thus in the Kemdrehfuge 14 remain (Fig A). At this time, the longest core pins 6 ⁴ , 6 ⁶ have already crossed the Kerndrehfuge 14 and therefore could not be intercepted at the protruding edge of the respective tumbler bore 5 ⁴ , 5 ^{6 of} the housing pins 8 ⁴ , 8 ⁶ , because these core pins 6 ⁴ , 6 ⁶ when passing through the core rotary joint 14 by their frustoconical projection 10 initially could not come into contact with the edge of the tumbler bore 5 ⁴ , 5 ⁶ . This contact is only made when the core pins 6 ⁴ , 6 ^{6 have} already moved partially in the corresponding tumbler bores 5 ⁴ , 5 ^{6 of} the cylinder housing 3 (FIG. 3). In this position, the core pins 6 ⁴ , 6 ⁶ and housing pins 8 ⁴ , 8 ⁶ Although the cylinder core ⁴ can be turned as far as a piece until the longer core pins 6 ⁴ , 6 ⁶ jam at its frustoconical projection 10. A self-locking rotation blocking is made possible by the fact that the cone angle α is 10 ° to 40 °, preferably 20 ° to 30 °. In order to prevent be through further manipulation by gently reducing the applied bias voltage between cylinder core 4 and the cylinder housing 3, the longer the core pins 6 ⁴ 6 ⁶ again pushed back by the loaded by the spring 7 housing pins 8 ^4, 8 ⁶ in the Zyiinderkern 4 , a housing pin 8 ^{3 is} used in at least one of the tumbler bores 5 ³ , in which at least the end facing the core pin 6 ^{3 has} a smaller-diameter projection 11 (FIG. 5). The condition for this is that the core pin 6 ³ cooperating with this housing pin 8 ³ must not contain a cone-shaped or diameter-reduced shoulder 10. For an advantageous symmetrical design of this housing pin 8 ³ and the other end can wear just such a smaller diameter approach 11 and continue to be provided an annular recess 12.

In the abovementioned preload reduction, the smaller-diameter projection 11 of the housing pin 8 ³ as shown in FIG. 5 already then back into the tumbler bore 5 ^third penetrate the core pin 6 ^{3 of} the cylinder core 4, while the longer core pin 6 ⁴ , 6 ⁶ still holds the lock cylinder in a jammed position.

To achieve the effect intended by the invention, it is sufficient if only the longest of the core pins (eg 6 ⁶ ) includes the neck 10.

LIST OF REFERENCE NUMBERS

1 lock cylinder

2 footbridge

3 cylinder housing

4 cylinder core

5 ¹ - 5 ⁶ tumbler hole

6 ¹ - 6 ⁶ Core pin

7 spring

8 ¹ - 8 ⁶ Housing pin

9 key channel

10 cone-shaped approach

11 smaller diameter approach

12 recess

13 ¹ - 13 ⁶ Dividing plane

14 core turning joint

15 impact wrench α cone angle

Claims

claims

1. Lock cylinder consisting of a cylinder housing with a rotatably mounted cylinder core, which include a plurality of radially extending tumbler holes in which for selective rotational release or rotational blocking of the cylinder core relative to the cylinder housing each have a core pin and a spring loaded housing pin are guided, wherein the core pin in a keyway of the cylinder core is designed engageable and thereby at least one of the core pins and one of the housing pins at its end facing the other pin has a smaller diameter approach, characterized in that at least the longest core pin (6 ⁶ ) has a conical projection (10) and with a housing pin (8 ⁶ ) in a common tumbler hole (5 ^δ ) is arranged, said housing pin (8 ⁶ ) not in one of the other tumbler bores (5 ¹ to 5 ⁵ ) located and with the smaller diameter approach (11) a allowed, shortest housing pin (8 ³ ) corresponds.

2. Lock cylinder according to claim 1, characterized in that the conical projection (10) is designed as a truncated cone.

3. Lock cylinder according to claim 1 or 2, characterized in that the projection (10) has a cone angle (α) of 10 ° to 40 °.

4. lock cylinder according to claim 1, characterized in that the housing pin (8 ³ ) at its core pin (6 ³ ) facing away from the end also has a smaller diameter approach (11).

5. Lock cylinder according to claim 4, characterized in that the housing pin (8 ³ ) includes an annular recess (12).