EP1526233A2 - Lock cylinder, in particular for a door lock - Google Patents

Abstract

The lock cylinder, in particular for a door lock, has a housing (12) which has a receiving space (16) and at least one receiving bore (28) opening into the receiving space (16), in which direction a first spring (33) opens on the receiving space (16) biased housing pin (32) is arranged. Furthermore, the lock cylinder has a core (14) which is rotatably arranged in the receiving space (16) and has a closing channel (18) for a key and at least one receiving bore (24) for a core pin (30) which extends between the closing channel (18) and the outer side of the core (14) and in a predetermined rotational position of the core (14) with the at least one receiving bore (28) of the housing (12) is aligned. The at least one housing pin (32) has a first pin part (34) and a second pin part (36). The two pin parts (34,36) are coupled together with radial play. The first pin part (34) bears against the first spring (33). Between the first pin member (34) and the second pin member (36) acts a second spring (38) biasing the second pin member (36) toward the core (14). The one pin part (34) has a sleeve (40) closed on one side, from which the second spring (38) and the other pin part (36) can be received.

Description

The invention relates to a lock cylinder, in particular profile cylinder and Although preferably for a door lock, the lock cylinder against tampering secured using the so-called striking technique.

Locking cylinders have a housing in which a receiving space for receiving a core is formed. The core is rotatable in the receiving space the housing stored. There are several first ones in the core Receiving bores, which extend in particular radially, starting from from the key receiving lock channel to the outside of the core. In the housing are also several second mounting holes trained, which are open to the receiving space and also themselves extend radially to the core. In a certain rotational position of the core The first and second mounting holes are aligned with each other in pairs. In the first receiving holes of the core are closing or Core pins, while in the second mounting holes of the housing Lock or housing pins are located, which are usually by spring force against the core pins are pressed. By inserting a key into the closing channel become the core pins according to the configuration of the key bit radially disengaged. The lock cylinder is open when the contact surfaces all pairs of core and housing pins with the outer surface of the core.

Locking cylinders of the aforementioned type are known e.g. from DE-C-199 34 883, FR-A-2 312,630 and US-A-3,802,234.

Lock cylinders are generally considered burglar resistant, but are available Unfortunately, all types of manipulation are not always protected. Especially it is disadvantageous, if one at a not with the regulatory Key open lock cylinder can not detect that he is manipulating was opened in an inadmissible way. In addition to the related namely with a theft inconvenience has the injured then the problem, not to be able to prove that the lock cylinder was opened by unauthorized manipulation.

In the lock cylinders described in the aforementioned publications The manipulation attempt leads to the unusability of the lock cylinder.

From US 2002/0189309 A1 discloses a lock cylinder is known in which one of Housing pins is formed in two parts and a sleeve-shaped first pin part and a second pin part with mushroom head received by the latter. The sleeve abuts against the housing pin spring while the mushroom head end points to the core of the lock cylinder.

From US 6 966 971 a lock cylinder is known which has a plurality of core pins, one of which is in two parts.

In recent times burglary or burglary attempts have become known at where the so-called striking technique was used. This is a prepared Key, whose key bit profile is equal to the profile of the closing channel is jerked into the core with a percussion tool. Through the motion impulse on the key also receive all housing and core pins a movement impulse. With skillful handling of the striking technique It is possible that the ends facing away from the key bit all Align core pins with the outside of the core so that they rotate can. With practiced application of the striking technique leaves this no Traces of manipulation on the lock cylinder, leaving the top described situation regarding the burden of proof.

An object of the invention is to provide a lock cylinder, in particular profile cylinder, to create, against manipulation attempts after the striking technique or other attempted manipulation, with which an escape of all Core and housing pins with the outer surface of the core or inner surface of the Housing receiving space for the core can be achieved, is protected.

• einem Gehäuse, das einen Aufnahmeraum und mindestens eine in den Aufnahmeraum mündende Aufnahmebohrung aufweist, in welcher ein mit einer ersten Feder in Richtung auf den Aufnahmeraumvorgespannter Gehäusestift angeordnet ist, und
• einem Kern, der drehbar in dem Aufnahmeraum angeordnet ist und einen Schließkanal für einen Schlüssel und mindestens eine Aufnahmebohrung für einen Kernstift aufweist, welche sich zwischen dem Schließkanal und der Außenseite des Kerns erstreckt und in einer vorgegebenen Drehstellung des Kerns mit der mindestens eine Aufnahmebohrung des Gehäuses fluchtet.

To solve this problem, a lock cylinder is proposed with the invention, which is provided with

• a housing having a receiving space and at least one opening into the receiving space receiving bore, in which a with a first spring in the direction of the receiving space prestressed housing pin is arranged, and
• a core which is rotatably disposed in the receiving space and has a closing channel for a key and at least one receiving bore for a core pin, which extends between the closing channel and the outside of the core and in a predetermined rotational position of the core with the at least one receiving bore of the housing flees.

• dass der mindestens eine Gehäusestift einen ersten Stiftteil und einen zweiten Stiftteil aufweist,
• dass die beiden Stiftteile mit radialem Spiel miteinander gekoppelt sind,
• dass der erste Stiftteil an der ersten Feder anliegt,
• dass zwischen dem ersten Stiftteil und dem zweiten Stiftteil eine zweite Feder wirkt, die den zweiten Stiftteil in Richtung auf den Kern vorspannt, und
• dass der eine Stiftteil eine einseitig geschlossene Hülse aufweist, von der die zweite Feder und der andere Stiftteil aufnehmbar sind.

In this lock cylinder is provided according to a first variant of the invention,

• the at least one housing pin has a first pin part and a second pin part,
• that the two pin parts are coupled together with radial play,
• that the first pin part rests against the first spring,
• that between the first pin part and the second pin part, a second spring acts, which biases the second pin part in the direction of the core, and
• the one pin part has a sleeve closed on one side, from which the second spring and the other pin part can be received.

Accordingly, according to the invention, at least one of the housing pins formed in two parts, with a spring acting between the two pin parts, which pretensions the one pin part in the direction of the core. Preferably comprises this at least one two-part housing pin one-sided closed sleeve whose closed end bears against the first spring and whose open end faces the core. The sleeve serves to guide the second pin part and for receiving the spring and the second pin part. Further it is advantageous if the lock cylinder according to the invention more Housing pins and a plurality of core pins, wherein at least one, preferably several of the housing pins are formed in two parts.

The two-part design of at least one of the housing pins has the advantage that it is at a bias of the core, as is the case with today's Manipulation attempts by the impact technique, by electro-picking devices or also by the single inching in of the housing pins takes place, too then comes to a discharge of the core, when the separation level or the gap between the two housing pin parts at the level of the separation plane of housing and core is located. But then the core does not work Continue to turn. Since it is not clear to the manipulator that the discharge of the prestressed core not due to the fully inserted Case pin enters, he can this kind of "core relief" too do not counteract. Thus, it is an effective protection against manipulation taking advantage of dynamic processes in the housing and core receiving bores given.

The spring coupling of the at least one two-part housing pin is also then beneficial if the most unlikely event should occur that the two pin parts are moved apart and one plane between the two apart moving pin parts with the separation plane of housing and core coincides. Then the core can be twisted or this can not be prevented by the two-part housing pin. But if it comes to a twist, so pulls the spring wire of the spring the gap between the housing and the core, as a result of which it becomes wedged both are coming. This blocking mechanism is basically in DE-C-199 34 883, but with the difference that there is the wire in an additional housing bore (without housing pin) is located while according to the invention described herein, the wire in a housing pin bore, So there is a housing bore with housing pin, an additional hole for the wire therefore is not required. The same wedging mechanism is also given if a part of the two-piece housing pin sheared due to a strong bias of the core in the housing becomes.

Shearing off the two-piece housing pin could be prevented by the parts or at least a part of this housing pin from an extreme resistant material, e.g. Ceramics, consist / consist.

You can also housing pins and core pins of different materials to influence the kinematic behavior of the pins / pin pairs, which is a further improvement in impact technology or electro-pick manipulation protection means.

According to an advantageous development of the invention, it is provided that the other pin part received by the sleeve has a shaft and a widened one End has. The one pin part is received with one of the sleeve Shank and arranged outside the sleeve widened End provided. By appropriate diameter dimensions of the shaft part and the sleeve can be the desired radial clearance and thus the realize radial offset of the two-part housing pin.

Preferably, the shaft has a greater axial length than the sleeve.

In a further advantageous embodiment of the invention, it is provided that the first pin part has a one-sided closed sleeve, at the closed Front side, the first spring is present and which is open to the core, and that the second spring and the second pin part are receivable by the sleeve.

The essence of the invention can be seen in the realization that the two-part Formation of at least one of the housing pins with compression spring coupling both Pin parts to a completely uncontrollable movement apart of both pin parts leads, because of the extremely low inertial mass immediately after the application of an axial pulse, as for example when applied the striking technique, an electric pick or the like on the two-piece Pen leads. This movement apart leads to an increase in length of the pin (dimension between the opposite end faces both pin parts). This excludes that this pin at impulsartiger mechanical excitation is not aligned with the outer surface of the core, but immersed in the respective opposite receiving bore as soon as the Pulse has subsided. The radial play of both pin parts relieves the housing pin, if this due to a bias of the core of a tilted Position is moved out into the housing into it. This case pin relief leads to a relief of the preloaded core within of the housing, without this can continue to turn.

According to the invention it is provided that a two-part housing pin a one-piece trained core pin opposite.

Fig. 1

eine Darstellung eines Profilzylinders im Längsschnitt im Verriegelungszustand ohne Schlüssel,

Fig. 2

eine Darstellung des Profilzylinders im Längsschnitt im Öffnungszustand mit Schlüssel,

Fig. 3

eine vergrößerte Darstellung des in den Fign. 1 und 2 mit III gekennzeichneten Bereichs zur Verdeutlichung des erfindungsgemäßen zweiteiligen Gehäusestifts und

Fig. 4

eine Querschnittsansicht in der Ebene IV-IV der Fig. 3.

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

Fig. 1

a representation of a profile cylinder in longitudinal section in the locked state without a key,

Fig. 2

a representation of the profile cylinder in longitudinal section in the open state with a key,

Fig. 3

an enlarged view of the in Figs. 1 and 2 marked with III area to illustrate the two-part housing pin according to the invention and

Fig. 4

a cross-sectional view in the plane IV-IV of Fig. 3rd

In the Fign. 1 to 3 is an inventive embodiment of a profile cylinder 10. The profile cylinder 10 has a housing 12 and a Cylinder core 14 which rotatably in a receiving space 16 of the housing 12 is arranged. The cylinder core 14 is with an off-center axial Locking channel 18 provided, in which the key 20 can be inserted. By doing Cylinder core 14 are several rows arranged core pins (in Embodiment five pins in a row), located in (first) receiving holes 24 of the cylinder core 14 are located. These receiving bores 24 extend radially through the cylinder core 14 between the closing channel 18 and the outside 26 of the cylinder core 14th

In the housing 12 are a plurality of second receiving holes 28, whose Number and arrangement of the number and arrangement of the first mounting holes 24 same. The second mounting holes 28 extend relative on the receiving space 16 of the housing 12 radially and are in the rotational position of the cylinder core 14 according to FIGS. 1 to 3 in flight with the first Receiving holes 24 arranged. In the first receiving holes 24 are the differently long core pins 30, while in the second Receiving holes 28 housing pins 32 are housed, which means Helical compression springs 33 are biased in the direction of the core pins 30. The helical compression springs 33 press on the housing pins 32, the core pins 30 against the arranged in the closing channel 18 ends of the first mounting holes 24. In this situation, the housing pins 32 both extend within the first and the second receiving bores 24,28, so that prevents rotation of the cylinder core 14 by the housing pins 32 becomes (Fig. 1). When inserted key 20, the core pins 30 are radially outward moved, by the key 20. The tuning of the width of the key 20 is tuned to the length of the core pins 30 such that this with inserted key 20 with the outside 26 of the cylinder core 14 are aligned. In this situation, the housing pins 32 are completely in the second receiving holes 28 pressed so that now the cylinder core 14 can be rotated (Fig. 2).

As can be seen in particular with reference to FIG. 3, at least one the housing pins 32 formed in two parts. This two-part housing pin 32nd has a first pin part 34 and a second pin part 36. Between two pin parts acts a spring 38, which, with appropriate freedom of movement at least to one side of this housing pin 32, for a movement apart, both pin parts provides (helical compression spring). The first pin part 34 is formed in the manner of a sleeve 40, at the bottom of which the housing pin 32 biasing spring of the receiving bore 28 is present. The open end of the sleeve-shaped first pin part 34 faces the core 14. Located in the sleeve 40 at least partially the second pin member 36 and the spring 38th Das second pin member 36 itself has a shaft 42 and a widened end 44th on, wherein the shaft 42 is received by the sleeve 40. The shaft 42 has an axial extent that is greater or less than the axial extent the sleeve 40 may be.

Will now over the two-piece housing pin 32 associated core pin 30th impulsively exerted a force, the housing pin 32 moves into the receiving bore 28 of the housing 12 inside. As soon as the forward movement of Core pin 30 is completed, the second pin member 36 is opposite moved to the direction of movement of the housing pin 32 back to the core 14, where he dips into the receiving bore 24. This is done directly and immediately. The pin member 36 thus each leads to the pin member 34 opposite movement out, so that it is never guaranteed that the pin member 36 with the outside of the core 14 is aligned. With impulsive excitation of all core pins 30 can not be the case that all pairs of contact surfaces of Housing and core pin with the outer surface of the core 14 are aligned, so that the Profile cylinder is reliably protected against such manipulation.

In addition to the spring coupling of the two pin parts 34 and 36 also provides their Two-piece with radial clearance for reliable protection against manipulation. Namely, starting from the closing situation shown in FIG. 3, the core 14th biased against the housing 12, so there is a tilt the housing pin 34 within the transition between the housing-receiving bore 28 and the opposite core-receiving bore 24th In other words, therefore, the sleeve 40 of the first pin part 34 is tilted. Will now, as with the manipulation experiments of interest here, on the two-piece housing pin 32 a force for moving the housing pin 32nd further exerted in the housing-receiving bore 28, so this is Movement ends at the moment in which the sleeve-shaped first pin part 34 is moved into the housing receiving bore 28 in. This situation is shown in Fig. 4. The separation level or separation area between the two pin parts 34 and 36 now aligned with the separation plane between the housing 12 and the core 14. Since the core 14 is biased, Now he lets himself to the radial clearance between the two pin parts 34 and 36 twist, but at the same time with the movement of the second pin part 36 is prevented in the housing-receiving bore 28, since the second pin part 36 strikes against the housing 12 with its widened end 44. For the manipulator, the relief of the housing pin 32 is so, as whether the contact plane between the housing pin 32 and core pin 30 in Height of the separation plane between the housing 12 and core 14 is located.

Claims (6)

Lock cylinder, in particular for a door lock, with a housing (12), which has a receiving space (16) and at least one receiving bore (28) opening into the receiving space (16), in which a housing pin (32), which is prestressed with a first spring (33) in the direction of the receiving space (16) ), and a core (14) rotatably disposed in the receiving space (16) and having a key closing channel (18) and at least one core pin receiving bore (24) extending between the closing channel (18) and the keyway Extending outside of the core (14) and in a predetermined rotational position of the core (14) with the at least one receiving bore (28) of the housing (12) is aligned, characterized, that the at least has a housing pin (32) has a first pin portion (34) and a second pin portion (36) are coupled to each other that the two pin portions (34,36) with radial clearance, that the first pin part (34) bears against the first spring (33), that acts between the first pin part (34) and the second pin member (36) includes a second spring (38) biasing the second pin part (36) toward the core (14), and that the one pin part (34) has a closed-end sleeve (40) from which the second spring (38) and the other pin part (36) can be accommodated. Lock cylinder according to Claim 1, characterized in that the other pin part (36) received by the sleeve (40) has a shank (42) and a widened end (44). Lock cylinder according to claim 2, characterized in that the shaft (42) has a greater axial length than the sleeve (40). Lock cylinder according to claim 2, characterized in that the shaft (42) has a smaller axial length than the sleeve. Locking cylinder according to one of claims 1 to 4, characterized in that the first pin part (34) has a sleeve (40) closed on one side, on the closed end side of which the first spring (33) rests and which is open towards the core (14), and that the second spring (38) and the second pin part (36) of the sleeve (40) are receivable. Lock cylinder according to one of claims 1 to 5, characterized in that the housing (12) and the core (14) each have a plurality of housing or core pins (32,30) provided receiving bores (24,28) and that at least one of Housing pins (32) has a first pin member (34) and a spring-loaded second pin member (36).

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