EP2840204A2 - Lock cylinder - Google Patents

Abstract

In a lock cylinder with a housing (1), a driver (9) with a locking lug (9 ') and with an outer side and an inner side on both sides of the driver (9), a cylinder core (3) is at least on the outside. provided with tumblers (15, 16, 17). In the housing (1), a predetermined breaking point (19) is provided on the outer side between the driver (9) and the next held tumbler, and a sleeper (12, 13; 13 ') is provided on the inside, which upon breaking away the Outside as well as when pulling the cylinder core (3) a permanently non-rotatably connected to the driver (9), but axially displaceable part (20, 34) blocked or with an inner cylinder core (2) connects. For this purpose, the axially displaceable part (20, 34) in the axial direction spring-loaded on the end face (4 ') of the cylinder core (3) of the outside directly or indirectly. The driver is axially immovable.

Description

Technical area

The present invention relates to a lock cylinder with a housing, a rotatable driver in the housing with locking lug and with an outside and inside on both sides of the driver, wherein at least on the outside of a cylinder core is provided with tumblers and on the inside of a biased by spring force sleepers which is locked by an axially displaceable by spring force part and at least partially retained in the housing and blocks the lock cylinder when the outer side breaks away due to omission of the lock.

State of the art

There are various methods known how to open lock cylinder forcibly. One method is to "pull" the cylinder core: turn a screw into the keyway and tighten vigorously. As a result, the tumbler pins are sheared off and the cylinder core can be removed.

Another method is to break out the entire outer part of the lock cylinder. As a result of the locking lug, the housing of the lock cylinder is greatly weakened in the middle; In addition, there is also the threaded hole for the fastening screw in this area. Now, if no high-quality fitting is used, it is relatively easy to break the outer part of the lock cylinder by bending back and forth.

Against the latter breaking method, breaking points are sometimes provided, so that the outer part only partially breaks away and thus the driver and the locking lug are not directly accessible.

• innerer Zylinderkern eingekuppelt und äußerer Zylinderkern ausgekuppelt
• äußerer Zylinderkern eingekuppelt und innerer Zylinderkern ausgekuppelt

In the WO 2009/156731 A is described a double lock cylinder, which is provided in principle with a conventional clutch. As stated on page 2, Z 14-18 of this document is correct, would - if both cylinder cores with the locking lug would always be rotatably connected - always a key on the inside and on the outside infected so that the locking lug (together with both cylinder cores) can be turned. This would of course make the lock unusable. For this reason a coupling is necessary. The clutch connects only the cylinder core with the locking nose, in which a key is inserted, and disengages the other cylinder core. A conventional clutch has two positions:

• inner cylinder core coupled and disengaged outer cylinder core
• outer cylinder core engaged and disengaged inner cylinder core

The clutch is usually moved by the key; when a key is inserted inside, it is moved towards the outside of the lock cylinder and thereby couples the inner cylinder core with the locking lug. Often the coupling is biased by a spring in one direction, so that - if no key is plugged - occupies a defined position.

According to the WO 2009/156731 A it is now provided that the clutch can assume a third position when the outer cylinder core or the entire outer lock cylinder half is forcibly removed. The clutch is then moved by a spring even further towards the outside of the lock cylinder and blocked in this position by a sleeper. Thus, the inner cylinder is constantly rotatably connected to the locking lug, and the locking lug can only be rotated when a matching key is inserted on the inside.

As has been found in the context of the present invention, this solution is only a small advantage over conventional lock cylinders, where the coupling is biased towards the outside. With the latter locks you can simply push back the clutch and then move the locking lug; in the lock cylinder according to the WO 2009/156731 A If this is not so easy because of the sleeper, but if you hit the clutch with force, the sleeper is sheared off (analogous to the tumblers when "pulling" the cylinder core) and the clutch can be disengaged. Thereafter, the locking nose is movable again.

This is indicated by the in Fig. 9a of WO 2009/156731 A provided pin 4052, which is to complicate the drilling, even easier, because this pin passes through the driver and projects beyond this. With a strong blow on this pin, the clutch can be solved.

A lock cylinder of the type mentioned is from the EP 2466039 A known. There, a double lock cylinder is described with sleepers, which are activated when canceling the outer part and should prevent rotation of the driver with the locking lug. For this purpose, the driver is arranged axially displaceable against spring force. When breaking the driver together with the locking lug should slide axially outwards, so that the sleeve-like elongated driver fitting spring-loaded sleeper engages in a recess for permanent, ie irreversible locking of the driver. This double lock cylinder will break in force application for lack of a defined breaking point at the threaded hole for the mounting bolt in Einstemmschloss so that the driver can be broken out.

The idea of EP 2466039 A lies in the displacement of the driver. The idea is understandable, as long as the double cylinder is not installed in a one-punch lock. As a result of the standard tolerances between the locking lug and the housing bottom or the ceiling of the Einstemmschlosses the locking lug hardly move axially in the Einstemmschloss. However, since the locking lug is formed integrally with the driver, the Einstemmschloss impeded the safe operation and possibly prevents the engagement of the sleeper.

Another disadvantage of this double-lock cylinder is that the sleeper is not activated when pulling the outer cylinder core, it must be broken off the entire outer part of the double lock cylinder, so that the sleeper is activated.

Brief description of the invention

It is an object of the present invention to improve the two described lock cylinder so that the locking lug after the Breaking out of the outer part can not be easily moved or removed; the locking lug should not only be blocked after breaking out of the outer part, but also after pulling the outer cylinder core; and finally, a secure function should also be ensured if the lock cylinder - as usual - is installed in a one-punch lock.

This is achieved by a lock cylinder of the type mentioned according to the invention that in the housing on the outside between the immovable in the axial direction driver and the nearest tumbler a predetermined breaking point is provided and that the axially displaceable part relative to the driver slidably and constantly rotatably mounted in this is spring-loaded in the axial direction on the front side of the cylinder core of the outside directly or indirectly.

According to the WO 2009/156731 A the sleeper is provided in the coupling part, and he engages - when it is activated - in an opening in the driver. In contrast, the sleeper according to the invention is not provided in the region of the driver or the closing nose, but further inside, so that it is less accessible from the outside. There is also more space available. The main advantage, however, is that not the clutch (which can be disengaged by moving) is blocked, but a part that is permanently connected to the driver rotation. Characterized in that the blocking according to the invention acts on a part which is permanently connected in rotation with the driver, a repelling of this part in the starting position is ineffective. In a double lock cylinder, this part may be the hub, which is often present anyway, in a rotary knob cylinder, this may be the shaft of the knob, or of course also a hub.

As mentioned above, in the double-lock cylinder according to the EP 2466039 A In the absence of a defined predetermined breaking point of this forceful use in the threaded hole for the mounting bolts in the mortise lock break, so that the driver can be broken out. In contrast, in the subject invention is a defined breaking point provided in the outer cylinder, so that the cancel takes place outside the coupling area and the driver remains protected. As also mentioned above, must be in accordance with EP 2466039 A Move the driver together with the locking lug axially, so that the blocking is triggered, so that it is possible that the axial displacement is hindered by the lock case of the Einstemmschlosses. In contrast, according to the invention, the driver together with the locking nose axially immovable, and it is located in the interior of an axially displaceable (but constantly rotatably connected to the driver) part, which bears against the cylinder core of the outside. When breaking away the entire outside, but also if only the cylinder core of the outside is pulled, this part shifts, causing the sleeper engages. The constantly rotatably connected to the driver part (which is blocked in the event of a violent departure by the sleeper) thus acts as a "feeler" at the same time to determine whether the outer cylinder core is still present.

It is particularly advantageous if the axial displaceability of the constantly rotatably connected to the driver part is at most as large as the diameter of the sleeper, preferably at most half as large. In this way, a shearing of the sleeper is impossible. Since according to the invention the sleeper does not act on the coupling (which inevitably requires a larger displacement), the axial displaceability of the part to be blocked can be optimized for the present purpose; Normally, this part never moves axially, but only when a violent attempt at break-up takes place. Slightly less than half the sleeper's diameter is currently considered optimal; then the sleeper can be bent at most, but never sheared off.

It is advantageous if the part permanently connected to the driver is non-rotatably a hub of the driver and guided on both sides of the carrier in the housing. Since the lock cylinder does not break exactly in the middle as a result of the predetermined breaking point, but just before the driver, this results in a good guidance of the driver even after the break, which makes a violent "tipping out" of the locking lug from the plane in which it normally rotates, difficult.

If the lock cylinder is designed as a double lock cylinder, it is expedient if the sleeper - when breaking away the outside or pulling the outer cylinder core - the cylinder core of the inside with the permanently rotatably connected to the driver part couples. In this way, the lock cylinder can be locked from the inside even when the sleeper was active, so that an emergency opening is guaranteed after a break-in attempt. However, as long as no key is attached to the inside, the driver is blocked.

To realize this concretely, it can be provided that the cylinder core of the inside is extended sleeve-shaped in the direction of the driver, that in the region of this sleeve-shaped extension, the hub is axially displaceable, that for the sleeper in the region of this sleeve-shaped extension a housing bore is provided which continues in the sleeve-shaped extension and in the hub - after axial displacement of the same - in a blind hole, and that the sleeper is in two parts, wherein the hub-facing part has a height corresponding to the thickness of the sleeve-shaped extension. By this embodiment, it is so - in contrast to WO 2009/156731 A - not necessary, inside (at the WO 2009/156731 A in the coupling, here in the hub) to provide pin and spring; This is expensive because there is very little space available. It can be a housing bore with spring and pin - as in tumblers - be provided. "Small" is just the upper part of the sleeper, basically a cylindrical plate, and making a cylindrical plate is easy. In addition, the cylindrical plate in the blind hole is protected against violent attacks after the activation of the sleeper.

So that in this solution but not the inner cylinder core is blocked by the lower part of the sleeper, it is expedient that the hub facing away from the part of the sleeper is formed on the side facing the hub cone-shaped. Due to the cone, the lower part of the sleeper is pushed back when the cylinder core is rotated.

If the lock cylinder is designed as a rotary knob cylinder and the rotary knob provided on the inside is constantly in rotary connection with the driver via a shaft, it is expedient if the sleeper - when the outer side or the outer cylinder core pulls away - blocks the shaft, if necessary a rotation of the shaft by a maximum of 30 °. In this case, so no separate component is necessary, it is blocked the shaft of the knob.

So that the lock cylinder can still be dismantled after activation of the sleeper from the inside, it is expedient if the sleeper is releasable after its activation from the inside, so that an emergency opening is ensured after a break-up attempt.

This can be realized in an expedient manner so that a ring of U-shaped recesses is provided in the shaft at a gradation, the recesses with the open side of the U starting from this gradation that the sleeper - when breaking away the outside or pulling of the outer cylinder core - engages in one of these recesses, and that the rotary knob together with the shaft against spring force is axially pulled out of the lock cylinder until the sleeper disengaged from a recess. In this way you can open the lock after a violent escape attempt simply by pulling the knob and then turn as usual.

Finally, it is expedient if the distance of the predetermined breaking point from the center of the closing nose is 7-12 mm. This leaves - seen from the middle of the locking nose - 7-12 mm, when the outer part of the lock cylinder is broken away. Locking cylinder and associated cylinder locks are standardized. If such a lock cylinder is installed in a standard cylinder lock and is then broken at the predetermined breaking point, it breaks in the immediate vicinity of the lock box, but not so close to the lock box that the remaining lock cylinder can be tilted into the opening of the lock box.

Finally, it is also advantageous if the two parts of the housing connected to each other on both sides of the predetermined breaking point by a web are, which extends obliquely to the longitudinal center plane of the housing. In this design, the housing breaks at the predetermined breaking point regardless of whether the outer part of the housing is bent left-right or top-bottom back and forth.

Short description of the drawing figures

• Fig. 1 einen Längsschnitt durch eine erste Ausführungsform eines erfindungsgemäßen Schließzylinders mit links eingestecktem Schlüssel;
• Fig. 1a denselben ohne Schlüssel;
• Fig. 2 das Detail II von Fig. 1 in vergrößertem Maßstab;
• Fig. 2a dasselbe ohne eingesteckten Schlüssel;
• Fig. 2b einen Schnitt entlang der Linie IIb-IIb von Fig. 1a;
• Fig. 3a bis 3c den inneren Kupplungsteil;
• Fig. 4a und 4b den äußeren Kupplungsteil;
• Fig. 5 einen Längsschnitt durch eine zweite Ausführungsform der vorliegenden Erfindung;
• Fig. 6 dasselbe, jedoch mit weggebrochenem äußeren Teil, wobei außerdem die Welle des Drehknopfs nicht geschnitten, sondern in Ansicht dargestellt ist;
• Fig. 7 einen Längsschnitt durch eine dritte Ausführungsform der vorliegenden Erfindung; und
• Fig. 8 den Drehknopf samt Welle gemäß der dritten Ausführungsform in perspektivischer Ansicht.

With reference to the accompanying drawings, the present invention will be explained in more detail. It shows:

• Fig. 1 a longitudinal section through a first embodiment of a lock cylinder according to the invention with left inserted key;
• Fig. 1a the same without a key;
• Fig. 2 the detail II of Fig. 1 on an enlarged scale;
• Fig. 2a the same without the key inserted;
• Fig. 2b a section along the line IIb-IIb of Fig. 1a ;
• Fig. 3a to 3c the inner coupling part;
• Fig. 4a and 4b the outer coupling part;
• Fig. 5 a longitudinal section through a second embodiment of the present invention;
• Fig. 6 the same, but with the outer part broken away, and in addition the shaft of the rotary knob is not cut but shown in view;
• Fig. 7 a longitudinal section through a third embodiment of the present invention; and
• Fig. 8 the knob with shaft according to the third embodiment in a perspective view.

Description of the embodiments

The lock cylinder according to the invention (see Fig. 1 ) In the usual way, a housing 1, in which inside and outside a respective cylinder core 2 and 3 is rotatably inserted. The housing 1 and the cylinder cores 2 and 3 are shown in 6-pin (ie there are six tumblers both inside and outside), but this is of course not mandatory. Each tumbler consists in the usual way of a core pin 15 and a housing pin 16, which are both pressed by a tumbler spring 17 in the direction of key channel or an inserted key 14. The measures provided for the housing pins 16 and the tumbler springs 17 corresponding holes in the housing 1 are each closed by a plug 18. With a matching key 14, the toothing is formed so that the dividing line between the core pin 15 and housing pin 16 at all tumblers coincides exactly with the dividing line between the cylinder core 2 and 3 and housing 1, so that the cylinder core 2 and 3 can be rotated, such as this in Fig. 1 can be seen on the left. Without a key, the cylinder core 2 or 3 is blocked by the housing pins 16, as can be seen on the right in FIG. With a mismatched key, the cylinder core 2 or 3 is blocked by at least one core pin 15 or by at least one housing pin 16, depending on whether the teeth are milled too low or too deep at the appropriate location.

Thus, the cylinder core 2 and 3 is fixed axially, it has a groove in each of which a locking ring 10 and 10 'is inserted. The housing 1 has for this purpose at the appropriate locations on a slot, so that the locking ring 10 and 10 'can be used and can then be supported on the flanks of the slot.

In order for the cylinder core 2 or 3 to be able to actuate the associated cylinder lock, the lock cylinder has a hollow-cylindrical driver 9 with a closing nose (in which Fig. 1 and 2 not visible). The driver 9 is driven by a hub 20. For this purpose, the hub 20 has externally a stepped toothing 20 "(see Fig. 2 ), and the driver 9 has inside a complementary toothing on. The hub 20 is thus connected to the driver 9 in a permanent rotationally fixed connection.

As a rule, only either inside or outside a suitable key 14 (s. Fig. 1 ) is inserted, so only one cylinder core 2 or 3 is always rotatable (and the other is blocked), the hub 20 each with the cylinder core 2 or 3, in which a key is inserted, coupled and disconnected from the other cylinder core. The hub 20 forms part of the coupling. In Fig. 1 and 2 the hub is coupled on the left, in Fig. 1a and 2a she is coupled on the right.

The hub 20 (see Fig. 2, 2a ) acts with an inner coupling part 21 and an outer coupling part 22 together. These two coupling parts 21 and 22 are connected to each other via a coupling pin 23, which ensures a predetermined distance between the two coupling parts 21 and 22. As inner coupling part 21, a conventional Kupplungsflügerl is used (see Fig. 3a, 3b and 3c ). The protruding wings 21 'and 21 "engage in corresponding recesses of the hub 20 (see Fig. 2 ), when the coupling part 21 by the key 14 (see Fig. 1 ) is engaged (shifted to the right), as in Fig. 1 and 2 is shown. (Note: the wings 21 'and 21 "are according to the view Fig. 1 . Fig. 2 and Fig. 3a normal to the drawing plane, so they are not visible; this also applies to the corresponding recesses of the hub 20, which in the Fig. 1 and 2 are not visible.) Since the key 14 (see Fig. 1 ) is not long enough, an extension pin 6 is provided for this purpose, which is slidably disposed in a sleeve-shaped extension 5 of the cylinder core 2. When the key 14 is inserted, this shifts the extension pin 6 to the right, and this in turn shifts the coupling part 21 (see Fig. 2 ) also to the right. The wings 21 'and 21 "(see Fig. 3a-3c ) slide in corresponding recesses in the cylinder core 2 (see Fig. 1 ), more precisely in the sleeve-shaped extension 5, when the coupling part 21 (see Fig. 2 ), that is, the coupling part 21 is connected to the cylinder core 2 (see Fig. 1 ) always rotatably connected. The coupling and decoupling takes place between the coupling part 21 (see Fig. 2, 2a ) and the hub 20. As a result of the coupling pin 23, the coupling part 22 is also to the right (see Fig. 2 ) (ie, in the disengaged position, as will be described below) when the coupling member 21 is displaced to the right in the engaged position.

On the outside is not enough space available for a Kupplungsflügerl, for this reason, as a coupling part 22, a cylindrical coupling body 22 '(see Fig. 4a and 4b ) with a coupling pin 22 "and a projection 22 '" used. The projection 22 '"slides in a corresponding recess 3' (see Fig. 2, 2a ) in the cylinder core 3 (please refer Fig. 1 . 1a ), more precisely in the sleeve-shaped extension 4, when the coupling part 22 (see Fig. 2, 2a ) is moved. Also, the coupling member 22 is thus always rotationally fixed to the cylinder core 3 (see Fig. 1 . 1a ) connected. If a key is inserted from the right, this presses on an extension pin 7, which in turn the coupling part 22 (see Fig. 2a ) moves to the left. As a result, the coupling pin 22 "comes into engagement with a corresponding bore 20 'in the hub 20. At the same time, the coupling part 21 is displaced to the left as a result of the coupling pin 23, that is disengaged.

The dimensions are chosen so that at the time of displacement of the clutch both sides are engaged; This ensures that the driver 9 can not turn unintentionally, whereby a coupling would be impossible.

As far as corresponds to this lock cylinder - with the exception of the asymmetrical coupling - largely the prior art.

Furthermore, a predetermined breaking point 19 (see Fig. 1 and 2 ) intended. If you try to break out the lock cylinder, break the entire outer part (in Fig. 1 and 2 the right part), including the entire cylinder core 3.

This predetermined breaking point 19 is realized by two cuts in the housing 1, between which a web 19 '(see Fig. 2b ) remains. This web 19 'extends obliquely to the longitudinal center plane of the housing. This causes the housing to break at the predetermined breaking point, regardless of whether the outer part of the housing is bent to the left-right or top-to-bottom.

This too is state of the art.

In order now to lock the cylinder even when breaking the outer cylinder half (in Fig. 1 . 1a . 2 and 2a right) against unauthorized opening, the following features according to the invention are provided:

The hub 20 (see Fig. 1 . 1a ) is arranged axially displaceably in the housing 1. The sleeve-shaped extension 4 of the cylinder core 3 extends to the hub 20, so that the end face 4 '(see Fig. 2, 2a ) of the sleeve-shaped extension 4 forms a stop surface for the hub 20. The hub 20 is pressed with a spring 24 against this end face 4 '.

This has the toothing 20 "of the hub 20 a distance 25. If after breaking away the outer lock cylinder half acting as a stop surface end face 4 'disappears, the hub 20 moves due to the spring 24 from the Normal position (as shown) by the distance 25 to the right in the activation position until the teeth 20 "rests against the sleeve 8. In Fig. 2b the sleeve 8 and the hub 20 can be seen at the top in the region of the keyway.

In the inner lock cylinder half is an additional guard locking (see Fig. 2, 2a ), which is not actuated by the key and is hereinafter referred to as "sleeper". This sleeper is in two parts: it has a lower part 13 and an upper part 12. In the housing 1, a housing bore 11 "is provided, into which the lower part 13, essentially a tumbler pin, is inserted, which in the usual way by a spring 11 ' (please refer Fig. 1 ) is biased. The spring 11 'is supported on a threaded pin 11. The housing bore 11 "continues in the sleeve-shaped extension 5 of the cylinder core 2, provided that it is in the starting position (which is always the case when the key is removed.) In the bore of the sleeve-shaped extension 5 is the upper part 12 of the sleeper, essentially a cylindrical plate, which is also biased upward as a result of the spring 11 'and the lower part 13. In the hub 20 is a blind hole 12' (see Fig. 2 ), which is offset in the normal position of the hub with respect to the bore in the cylinder core or in the housing, but in the activation position is aligned. The depth of the blind hole 12 'is less than the thickness of the upper part 12 (of the cylindrical plate).

The features of the invention function as follows:

As long as the lock cylinder is intact, the hub 20 is supported on the end face 4 'of the cylinder core 3 (see Fig. 1 . 1a ), and the blind hole 12 '(see Fig. 2, 2a ) is opposite the upper part 12 of the sleeper, so opposite the cylindrical plate, offset. This keeps the sleeper permanently disabled during normal operation (hence the name).

However, if the outer part of the lock cylinder is broken away at the predetermined breaking point 19, and the entire cylinder core 3 (see Fig. 1 . 1a ) away. Thus, the abutment surface for the hub 20 is removed, and the hub 20 by the spring 24 (see Fig. 2, 2a ) to the right into the activation position. Thus, the blind hole 12 'is aligned with the upper part 12 of the sleeper (ie with the cylindrical plate), and this partially (because it is thicker than the blind hole 12' deep) in the blind hole 12 ', partially he remains in the hole the sleeper-shaped extension 5. Thus, the sleeper is activated and the cylinder core 2 because of the upper part 12 of the sleeper permanently coupled to the hub 20 - even without inserted key 14. This makes it impossible to rotate from outside the driver 9 together with the locking lug, because this is about the hub 20 with the cylinder core 2 (see Fig. 1 ), and the cylinder core 2 (on the inside) is still intact even after the outer part has broken away and can not be turned without a suitable key.

In order to remove the lock cylinder after activation of the sleeper, one must reach the inside of the lock cylinder. With the appropriate key 14, the lock cylinder can be locked, because the lower part 13 of the sleeper has a conical taper at the top, so that it is pressed upon rotation of the cylinder core 2 back into the bore in the housing 1 and does not hinder the rotation of the cylinder core 2. Thus, from the inside an emergency opening after a break-up attempt and thus an expansion of the lock cylinder is possible.

Based on FIGS. 5 and 6 Now, the invention will be described in a rotary knob cylinder. A rotary knob cylinder has only on the outside of a conventional cylinder core 3 (see Fig. 5 ), which can be locked with a key 14; on the inside he has a knob 31, which can be turned by hand without a key. The cylinder core 3 according to this embodiment is designed very similar to the cylinder core 3 according to Fig. 1 ; in Fig. 5 are however the Core pins, housing pins, tumbler springs and plugs (items 15-18 in Fig. 1 ) not shown, you can see the housing bores 16 'and the core holes 15'. In the area of the key channel 14 ', the core bores 15' appear narrower.

For rotary knob cylinder you choose in mass production for cost reasons usually the same housing 1 as in double cylinders, instead of the inner cylinder core of the knob 31 is used with a shaft 34. Therefore, housing holes 16 "are also present in the area of the inner side, but normally they are not used, but according to the present invention they are used, as will be explained below: The front part of the shaft 34 is rotatably connected to the driver 9 So the hub 20 of Fig. 1 and 2 , The rotary connection can be done as usual with hubs on a stepped toothing. The knob 31 is thus permanently connected to the driver 9 and thus also with the locking lug 9 'in rotary connection. The shaft 34 rests with its free end on the end face 4 'of the cylinder core 3.

The outer part of the lock cylinder is according to the embodiment Fig. 5 slightly shorter than in the embodiment according to Fig. 1 so that the extension pin 7 of Fig. 1 can be omitted. However, the clutch must offer a search function, because the knob can stand anywhere so that can not be engaged directly in every situation.

For this reason, a first coupling part 41 and a second coupling part 42 are provided. The second coupling part 42 engages with wings 42 '(s. Fig. 6 ) in slots 42 "of the hollow shaft 34 in this area, the second coupling part 42 is thus non-rotatably but axially displaceably connected to the shaft 34. It is connected by a spring 43 (see FIG. Fig. 5 ) in the direction of cylinder core 3 (to the left) biased.

The first coupling part 41 engages with a projection 41 'in a slot 41 "of the cylinder core 3. The first coupling part 41 is thus rotatably but axially displaceably connected to the cylinder core 3. Between the first coupling part 41 and the second coupling part 42 there is a Spring 44. Also, the first coupling part 41 is thus in the direction Cylinder core 3 (to the left) biased.

In the illustrated position, when the key 14 presses against the first coupling part 41, this is rotatably connected to the second coupling part 42 because a wing 45 of the first coupling part 41 engages in a corresponding slot of the second coupling part 42.

When the key 14 is plugged in, however, the wing 45 and the corresponding slot are normally not facing each other. In this case, the key 14 presses both coupling parts 41 and 42 to the right (against the force of the spring 43). Now, if the key 14 is rotated, come the wing 45 and the corresponding slot sometime to face each other; since the spring 43 is stronger than the spring 44, now the second coupling part 42 is to the left (as in Fig. 5 shown), and the clutch engages.

Furthermore, a predetermined breaking point 19 is provided in the housing 1. If you try to break out the lock cylinder, break the entire outer part (in Fig. 5 the left part), including the entire cylinder core 3, as shown in FIG Fig. 6 is shown.

As far as the rotary knob cylinder largely corresponds to the prior art.

According to the invention are in two housing bores 16 "(s. FIGS. 5 and 6 ) Housing pins 16 are inserted, each by a (in Fig. 6 not shown) spring against a ball 32 are pressed, which are each inserted slightly off-center in a V-shaped recess 33 of the shaft 34. As a result, the shaft 34 together with the rotary knob 31 in the direction of the driver 9 with locking lug 9 '(to the left, as in FIGS. 5 and 6 shown biased), so that the shaft 34 against the end face 4 '(see Fig. 5 ) is pressed.

Furthermore, a sleeper 13 'is provided in the form of a stepped tumbler pin, which is also provided by a (in Fig. 6 not shown) spring is pushed upwards. A removable lock pin 38 (eg a threaded pin) forms the support for the springs. The shaft 34 has a groove 35 (s. Fig. 6 ), which is stepped at the closing nose 9 'side facing, so has a step 36. At Nutengrund are over the Circumference distributed holes 37 provided. The diameter of these holes 37 corresponds to the width of the groove 35 (without the gradation) and the diameter of the stepped end of the sleeper 13 '. In the normal case, the sleeper 13 'is supported on the step 36. As a result, the shaft 34 together with the rotary knob 31 is axially fixed.

The rotary knob cylinder according to the invention works as follows:

As long as the lock cylinder is intact, the sleeper 13 'is supported on the step 36, the shaft 34 together with the rotary knob 31 can rotate freely and takes the driver 9 together with the locking lug 9' with.

If the outer part of the rotary knob cylinder is broken, this breaks at the predetermined breaking point 19 (see Fig. 5 ), and it is the outer part of the rotary knob cylinder, together with its cylinder core 3 removed. Thus, the abutment surface for the shaft 34 falls away, and the shaft 34 shifts in the direction of the locking lug 9 ', ie to the left, as in Fig. 5 seen. This results in the in Fig. 6 illustrated state: The sleeper 13 'slips into the groove 35, and when trying to rotate the driver 9 together with the locking lug 9', it snaps into one of the holes 37 and thus prevents further rotation of the driver 9. There should be enough holes 37 distributed on the circumference be arranged, that in any case a rotation by a maximum of 30 ° is sufficient for the sleeper 13 'engages.

The provision of the holes 37 in the groove 35 (and not on the outer periphery of the shaft 34) has the advantage that the interface between the sleeper 13 'and the shaft 34 is not accessible. It is therefore not possible to insert a thin leaflet between the shaft 34 and the housing 1 as far as the holes 37 in order to prevent the sleeper 13 'from locking into one of the holes 37.

In order to disassemble the lock cylinder after a break-up attempt (ie after activation of the sleeper 13 '), one must also get to the inside of the lock cylinder here. Then you can take out the lock pin 38: As a result, the springs lose their abutment, the sleeper 13 'falls out of the hole 37 and the knob 31 can be rotated again. Thus, even here after an attempt to break up an emergency opening and thus disassembly of

Locking cylinder possible.

The in the Fig. 7 and 8th illustrated third embodiment shows a similar knob cylinder, but in which the operation after a break-open attempt is even easier.

For this purpose, the driver 9 with the locking lug 9 'is not driven directly by the shaft 34 of the rotary knob 31, but by a hub 20. This hub 20 is fixedly connected by means of a pin 62 with a connecting piece 61, which in turn via another pin 63 is fixedly connected to a sleeve-shaped hub extension 64. The hub 20 and the hub extension 64 can therefore be considered as a solid part. In the hub extension 64 is the shaft 34. This is secured therein by means of a pin 65, wherein the pin 65 is guided in the hub extension 64 but in slots 66. Therefore, the shaft 34 is axially slidably mounted in the hub extension 64, but non-rotatably connected thereto. By a spring 67 which is supported on the one hand on the pin 65 (ie indirectly on the shaft 34) and on the other hand on the hub extension 64, the shaft 34 is biased in the direction of the outer cylinder core 3.

As already mentioned in the second embodiment, one chooses for rotary knob cylinder in mass production for cost reasons usually the same housing 1 as in double cylinders. As a result, housing bores 16 "are also present in the region of the inner side, and a sleeper 13 ', which normally slides at the end of the hub extension 64, is again inserted in one of these housing bores 16". However, as the hub extension 64 translates toward the outer cylinder core three, it locks into one of the recesses 37 'of the shaft 34. As in Fig. 8 clearly seen, these recesses 37 'are U-shaped in plan view, starting from a step 59 of the shaft 34 and in the direction of this gradation 59 are open.

Furthermore, in another housing bore 16 "a housing pin 16 is inserted, which is pressed by a spring against a ball 32, which is inserted slightly off-center in a V-shaped recess 33 of the hub extension 64. Thus, the Hub extension 64 together with hub 20 in the direction of the driver 9 with locking lug 9 '(to the left, as in Fig. 7 shown) biased so that the hub 20 against a ring 70 (which has a flange above) is pressed, which in turn is supported on the outer cylinder core 3.

Finally, a fixing pin 69 is inserted in a third housing bore 16 ", which is pressed by a spring into a rectangular groove 68 of the hub extension 64. The diameter of the end of the fixing pin 69 is less than the width of the rectangular groove 68, so that the fixing pin 69 is the hub extension 64 As a result of the fixing pin 69, it is impossible to extract the rotary knob 31 together with the hub 20 and hub extension 64 from the lock cylinder, but the fixing pin 69 allows a displacement of the hub extension 64 including the hub 20 from the normal position towards the outer cylinder core 3 to some extent.

The illustrated on the left (outer) cylinder core 3, which is axially fixed by a circlip 10 as usual, can be in the usual way by a key 14 which is inserted into a keyway 14 'actuated because the key 14, the core pins 15 and the Housing pins 16 arranges so that their separation surfaces are exactly at the interface of the cylinder core 3.

The coupling is realized here as follows: A first coupling part 51 is axially displaceable in the cylinder core 3, but rotatably guided. This first coupling part 51 is also guided on a pin 51 'inserted centrally in the hub 20. (This pin 51 'has a slot which lies in the plane of the drawing, recognizable by the absence of hatching in this area.) A spring 54, which is mounted around the pin 51', pushes the first coupling part into the cylinder core 3. The second coupling part is realized in the form of a pin 52 which protrudes from the hub 20, but can be pressed against the force of a spring 53 in the hub 20. This pin 52 protrudes in the engaged state in a corresponding hole 55 of the first coupling part 51st

If no key 14 is inserted, the first coupling part 51 by the spring 54 is pressed into the cylinder core 3, so that the pin 52 is outside the hole 55 and the clutch is disengaged. If a key 14 is inserted, the first coupling part 51 is pressed in the direction of the hub 20. Since, in general, the hole 55 and the pin 52 will not be aligned, the pin 52 is pressed against the force of the spring 53 in the hub 20. Turning now the key 14, eventually the pin 52 and the hole 55 are aligned, and due to the spring 53, the pin 52 is pressed into the hole 55. Thus, the cylinder core 3 and the hub 20 are rotatably connected to each other, the clutch is engaged.

In addition to the driver 9 is located on the side of the outer cylinder core 3, a sleeve 8, on the one hand leads the driver 9 and on the other hand serves as a stop for the hub 20 in the event of a Aufbruchtruchs. On the side of the knob 31 is located next to the driver 9, a ring 10 ", which carries the driver 9 on this page.

Normally all parts are in the in Fig. 7 shown location. As a result of the ball 32, which presses against an edge of the V-shaped recess 33, the hub extension 64 together with the hub 20 is biased toward the outer cylinder core 3. However, the hub 20 can not move in this direction because it rests against the ring 70, which in turn is supported on the outer cylinder core 3.

However, if the outer cylinder core 3 is removed during a break-up attempt (be it by core pulling, be it by breaking away the entire outer part at the predetermined breaking point 19), the ring 70 can move until it rests with its flange against the sleeve 8. By the bias of the hub extension 64, the hub 20, the hub extension 64 and the ring 70 move to this stop. As a result, the sleeper 13 'is no longer at the end of the hub extension 64 and locked - at least after a rotation of the hub 20 and thus the shaft 34 - in one of the recesses 37' a.

To open the lock from the inside, you only need to turn the knob 31 inward, because as a result of the open in the direction of gradation 59 holes 37 of the sleeper 13 'thereby disengaged, and the Knob 31 can be rotated as usual and the lock thus be opened.

List of reference numbers

1

casing

2

Cylinder core, inside

3

Cylinder core, outside

3 '

recess

4

Sleeve-shaped extension

4 '

front

5

Sleeve-shaped extension

6

extension pin

7

extension pin

8th

shell

9

takeaway

9 '

Cam

10, 10 '

circlip

10 "

ring

11

Set screw

11 '

feather

11 "

housing bore

12

Upper part of the sleeper

12 '

blind

13

Lower part of the sleeper

13 '

sleeper

14

key

14 '

keyway

15

core pin

15 '

core drilling

16

housing pin

16 '

housing bore

16 "

housing bore

17

tumbler

18

Plug

19

Breaking point

19 '

web

20

hub

20 '

Bore in 20

20 "

gearing

21

inner coupling part

21 ', 21 "

Wing of 21

22

outer coupling part

22 '

Coupling body of 22

22 "

Coupling pin of 22

22 ''

Advantage of 22

23

coupling pin

24

feather

25

distance

31

knob

32

Bullet

33

V-shaped recess

34

Wave of the knob

35

groove

36

Step of the groove 35

37

holes

37 '

recess

38

locking pin

41

first coupling part

41 '

Advantage of 41

41 "

slot

42

second coupling part

42 '

wing

42 "

slot

43

feather

44

feather

45

wing

51

first coupling part

51 '

pen

52

pen

53

feather

54

feather

55

hole

59

gradation

61

joint

62

pen

63

pen

64

hub extension

65

pen

66

Long holes in 64

67

feather

68

rectangular groove

69

locating pin

70

ring

Claims (11)

Lock cylinder with a housing (1), a rotatable in the housing driver (9) with locking lug (9 ') and with an outer side and an inner side on both sides of the driver (9), wherein at least on the outside of a cylinder core (3) with tumblers (15, 16, 17) and on the inside of a biased by spring force sleepers (12, 13, 13 ') is provided which is locked by an axially displaceable by spring force part and at least partially retained in the housing (1) and the lock cylinder blocked on breaking away the outer side due to omission of the lock, characterized in that in the housing (1) on the outer side between the immovable in the axial direction driver (9) and the nearest tumbler a predetermined breaking point (19) is provided and that the axially displaceable part ( 20, 34) relative to the driver (9) displaceable and permanently rotatably mounted in this and spring-loaded in the axial direction on the front side e (4 ') of the cylinder core (3) of the outside directly or indirectly. A lock cylinder according to claim 1, characterized in that the axial displaceability of the part (20, 34) which is permanently connected to the driver so as to be non-rotatable is at most as large as the diameter of the sleeper (12, 13; 13 '), preferably at most half as large. Lock cylinder according to claims 1 or 2, characterized in that the permanently non-rotatably connected to the driver (9) part is a hub (20) of the driver (9) and is guided on both sides of the driver (9) in the housing (1). Lock cylinder according to one of claims 1 to 3, characterized in that it is designed as a double lock cylinder and the sleeper (12, 13) - at breaking away the outside or pulling the outer cylinder core (3) - the cylinder core (2) of the inside with the constantly rotatably coupled to the driver (9) connected part (20). Lock cylinder according to claim 4, characterized in that the cylinder core (2) of the inner side sleeve-shaped in the direction of the driver (9) is extended, that in the region of this sleeve-shaped extension (5), the hub (20) is axially displaceable that for the sleeper (12, 13) in A housing bore (11 ") is provided in the sleeve-shaped extension (5) and continues in the sleeve-shaped extension (5) and in the hub (20) - after axial displacement thereof - in a blind hole (12 '), and in that Sleeper (12, 13) is in two parts, wherein the hub (20) facing part (12) has a height corresponding to the thickness of the sleeve-shaped extension (5). Lock cylinder according to claim 5, characterized in that the hub (20) facing away from the part (13) of the sleeper on the hub (20) facing side is formed cone-shaped. Lock cylinder according to one of claims 1 to 3, characterized in that this is designed as a rotary knob cylinder, wherein the provided on the inside knob (31) via a shaft (34) is constantly in rotation with the driver (9), and that the sleeper (13 ') - in case of breaking away the outer side or pulling the outer cylinder core (3) - the shaft (34) blocked, possibly after a rotation of the shaft (34) by a maximum of 30 °. Lock cylinder according to claim 7, characterized in that the sleeper (13 ') after its activation from the inside is detachable. Lock cylinder according to claim 8, characterized in that in the shaft (34) at a step (59) a ring of U-shaped recesses (37 ') is provided, wherein the recesses (37') with the open side of the U of this gradation (59) assume that the sleeper (13 ') - when breaking away the outer side or pulling the outer cylinder core (3) - into one of these recesses (37') engages, and that the rotary knob (31) together with shaft (34) against Spring force is axially pulled out of the lock cylinder until the sleeper (13 ') out of engagement from the one recess (37') comes. Lock cylinder according to one of claims 1 to 9, characterized in that the distance (x) of the predetermined breaking point (19) from the center of the locking lug (9 ') is 7-12 mm. Lock cylinder according to one of claims 1 to 10, characterized in that the two parts of the housing (1) on both sides of the predetermined breaking point (19) by a web (19 ') are interconnected, which extends obliquely to the longitudinal center plane of the housing (1) ,

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