KNOB FOR AN ELECTRONIC LOCKING CYLINDER

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a knob for a locking cylinder, particularly a knob for an electronic locking cylinder as well as an electronic locking cylinder with such a knob. More specifically, the present invention preferably provides a novel knob for a locking cylinder which provides additional security in specific situations.

BACKGROUND OF THE INVENTION

[0002] Typically, mortise locks according to DIN 18251 for doors are provided with mechanical locking cylinders according to DIN 18252. Such locking cylinders comprise a cylinder housing and a cylinder core inserted therein which can be rotated within the cylinder housing. With a matching key a lock bit extending from the cylinder housing is rotatable in order to lock or unlock the lock. There are different designs like profile cylinders, round cylinders, oval cylinder (see also DIN EN 1303). Nowadays, the locking cylinder is the core part of the security of lock and door.

[0003] The known mechanical locking cylinders leave open several desires in respect of security, design of locking structures and flexibility, since mechanical keys can be copied. In order to avoid the problems associated with mechanical locking cylinder, it is often suggested to use electronic locking cylinders.

[0004] Electronic locking cylinders are known in the state of the art. Electronic locking cylinders are generally characterized in that they comprise an electronic coding, e.g., in form of electronic signals, instead of a mechanical coding of the keys. Instead of a mechanical key, here an "electronic key" in form of a transmitter or a transponder is typically used, which transmits the electronic signals from the transponder to the locking cylinder by means of electromagnetic waves. The signals are verified by means of an electronic means wherein said electronic means is typically integrated in one or two knobs which are provided at the locking cylinder (profile cylinder). The knob or the knobs serve(s) beside the accommodation of electronic components also as handle for operating the locking cylinder and its lock bit.

[0005] For instance, DE 198 51 308 discloses a locking cylinder having a cylinder housing which can be inserted into a door lock, a lock bit being rotatable relative to the housing for operating the locking means of the door lock, a handle at the inner side of the door for operating the lock bit from inside and a handle at the outer side of the door for operating the lock bit provided that access permission has been determined.

[0006] Electronic locking cylinders are available in form of a single knob cylinder (half cylinder) or double knob cylinder. For mounting or dismounting an electronic single knob cylinder it is often necessary to rotate the knob by some degrees so that the lock bit does not extend transversally from the cylinder housing such that the locking cylinder can be inserted into the lock housing. The locking cylinder is fixed at the lock housing by a relatively long screw, the fastening screw, fixing screw or forend screw (in German: Stulpschraube). When mounting double knob cylinders, additionally at least one of the two knobs has to be removed in order to be able to insert the locking cylinder into the lock housing.

[0007] Typically, the outer knob is coupleable via an actuator to the lock bit. Without successful authentication, the actuator is in a decoupled state such that a rotation of the outer knob does not result in a rotating action of the lock bit, i.e., no torque or not enough torquq is transmitted from the outside knob to the lock bit. It is preferred that only after successful authentication, a coupling between the respective knob and the locking bit is provided, typically for a limited time, e.g. more than 1 and less than 10 seconds. This is typically achieved in that the actuator moves from a decoupled state into a coupled state, preferably only for a short time, such that a rotation of the outer knob results in a rotation of the lock bit and the lock can be locked or unlocked.

[0008] The inner know is often fixedly coupled to the locking bit such that locking and unlocking from the inner side is always possible, i.e, locking and unlocking is possible without authentication. Such locking cylinders with a permanently fixed coupling between the locking bit and the knob are often used for cellar doors such that persons inside the cellar can always unlock the lock in case sombody accidentally closed the lock from outside. Such a fixed coupling, however, also allows any person locking the lock from the inner side.

[0009] EP 0 588 209 A1, for example, discloses a lock with electrical activation which can be inserted in the place of a conventional cylinder lock. The lock includes an electromagnet accommodated in the internal handgrip and activable from outside to operate an engagement system which produces the rotary coupling of the external handgrip to the bit. The internal handgrip is always rigidly associated in rotation with the bit for actuating a spring latch and/or a bolt.

[0010] In specific situations, however, it is undesirable that the lock is lockable from inside by an unauthorized person. Such an unauthorized locking from the inside might be avoided by the omission of the inner knob. Omitting any means at the inner side of the lock is, however, a security risk, e.g., in case of emergency. For instance, a person inside the room could be locked unintentionally such that this person wound have no chance to open the lock from inside.

SUMMARY

[0011] It is the object of the present invention to overcome said security risk and still avoiding that the lock is locked from inside.

[0012] The object of the present invention is solved by the features of the independent claims. The dependent claims describe further preferred embodiments and modifications of the present invention.

[0013] In the following the terms "locking cylinder" and "lock cylinder" are used synonymously. Moreover, also the terms "ratchet", "ratchet mechanism", "freewheel", "freewheel clutch", "one-way clutch" are used synonymously.

[0014] In particular, the present invention relates to a rotatable knob for a locking cylinder, preferably an electronic locking cylinder, the rotatable knob having a one-way clutch mechanism which provides torque transfer from the knob to a rotatable shaft of the locking cylinder depending on the rotation direction of the knob. The shaft is fixedly connected with a locking bit of the locking cylinder, wherein rotation of the knob in a first direction transfers sufficient torque to the shaft such that the locking bit rotates with the knob. If the locking cylinder is mounted in a locking environment, e.g. mounted in a mortise lock, the transferred torque to the locking bit is large enough to lock or unlock a locking mechanism/unlocking mechanism of the mortise lock. On the other hand, rotation of the knob in the opposite "torque-free" direction does not transfer enough torque to the shaft such that the locking bit does not rotate with the knob in the lock environment, e.g., unlocking is not possible. A person skilled in the art appreciates that "torque-free" should be understood as no torque or only a small amount of torque is transmitted which is too small to actuate the locking/unlocking mechanism in a lock environment, e.g., when the locking cylinder is mounted in a mortise lock.

[0015] Preferably, the one-way clutch mechanism comprises at least two pawls, one pawl for the torque-free direction clockwise and the other pawl for the torque-free direction counterclockwise.

[0016] Preferably, the torque-free direction of the one-way clutch mechanism is switchable between clockwise and counterclockwise.

[0017] It is further preferred to provide an access channel, preferably at a back side of the knob which is configured to insert a tool for rotating a control disc of the one-way clutch mechanism to activate or deactivate a pawl of the clutch mechanism.

[0018] The knob may comprise a first knob part and a second knob part, wherein the first knob part is preferably fixedly connected to an outer surface of the knob and the second knob part is preferably fixedly connected to the shaft and one of the pawls engages with the first knob part and second knob part in case the knob is rotated against the torque-free direction.

[0019] The first knob part may comprise radially oriented protrusions and radially oriented depressions. The second knob part may comprise radially oriented protrusions and radially oriented depressions, wherein the one pawl preferably engages with shoulders between the depressions and the protrusion in case the knob is rotated against the torque-free direction.

[0020] Preferably one of the pawls is configured to slide at least over the protrusions in case the knob is rotated in the torque-free direction.

[0021] The present invention also relates to a locking cylinder with a knob according to the present invention, with the knob mounted on one end of the locking cylinder.

[0022] Preferably, the knob is a room inside knob and undetachable mounted to the locking cylinder, or detachable mounted to the locking cylinder.

[0023] The locking cylinder is preferably an electronic locking cylinder which comprises a second knob which is a room outside knob.

[0024] From mechanical or automotive engineering, a freewheel, ratchet or one-way clutch is known. The same principles are used for the knob of the present invention. Thus, rotating the knob in one direction (e.g. clockwise) does not rotate the rotatable shaft of the locking cylinder such that locking/unlocking the door is impossible. Rotating the knob in the other direction (e.g., counterclockwise) provides a torque transmitting coupling between the knob and the rotatable shaft of the locking cylinder such that, for example, a locked door may be unlocked.

[0025] The present invention is not limited to any particular embodiment of a freewheel or one-way clutch mechanism. Nevertheless, a non limiting examples for freewheel mechanisms will be discussed in the following for a further understanding of the present invention. Preferably, the free rotation direction of the one-way clutch is switchable between clockwise and counterclockwise which is preferred in case the cylinder should be mountable to right side and left side doors.

[0026] In general, the "one-way clutch" comprises two main parts:

i) the shaft of the lock cylinder which is fixedly coupled/connected to the lock bit, i.e., rotation of the shaft results in rotation of the locking bit and therefore in locking and unlocking a lock in case the lock cylinder is mounted in mortise lock, and

ii) the knob, which transfers torque to the shaft if rotated in one direction and does not transfer torque or not enough torque to the shaft sufficient to rotate the shaft if rotated in the other direction. In particular, if the knob is rotated in the other direction, there might be small frictional forces such that the shaft is also rotated in the other direction. Such small frictional forces are, however, not large enough to actuate a locking mechanism when the locking cylinder is mounted in a locking environment, e.g., mounted in a mortise lock.

[0027] For instance, a simple one-way clutch comprises two saw-toothed, spring-loaded discs pressing against each other with the toothed sides together, somewhat like a ratchet. Rotating in one direction, the saw teeth of the drive disc lock with the teeth of the driven disc, making it rotate at the same speed and same direction. If the drive disc rotates in the other direction, the teeth of the drive disc slip over the driven disc teeth such that the driven disc does not rotate while the drive disc rotates, producing a characteristic clicking sound.

[0028] Another example of a one-way clutch comprises an internally step-toothed cylinder, wherein said cylinder forms the knob. At least one, preferably two or more spring-loaded, preferably hardened steel pawls transmit the load between the outer cylinder and an inner shaft. More pawls help spread the wear and give greater reliability although, simultaneous engagement of more than two pawls is rarely achieved.

[0029] According to a further preferred embodiment, the inside knob, i.e., the knob which should be mounted to the mortise lock in the direction of the "inner room", of the present invention may comprise an one-way clutch, which allows transmitting torque to the shaft of the lock cylinder when rotated in one direction while preventing transmission of enough torque when rotated in the opposite direction. In other words, in case of rotating in the opposite direction a very small amount of torque might be transmitted which is, however, so small that the shaft will not rotate in the opposite direction or will only slightly rotate but not transmit sufficient amount of torque to actuate the locking or unlocking mechanism of the lock.

[0030] The invention preferably relates to an electronic locking cylinder having at least one inner/inside knob of the above described kind, i.e., a single knob cylinder. The present invention also refers to double knob electronic cylinder which comprises the knob of the present invention at the inner side and another outside knob, preferably a knob which is couplable and decoupleable to/from the shaft of the lock cylinder by means of an actuator. The electronic double knob cylinder according to the present invention preferably comprises an inner knob which can be removed from the locking cylinder.

[0031] In the following, a preferred embodiment of the present invention will be described in detail by referring to the Figures:

BRIEF DESCRIPTION OF THE DRAWING

[0032] 

Fig. 1

shows a perspective view of an electronic locking cylinder according to the present invention with an outer knob and an inner knob with a one-way clutch mechanism;

Fig. 2

shows a side cross-sectional side view through the inner knob according to the present invention;

Fig. 3

shows front cross-sectional view along line A-A of Fig. 2; and

Fig. 4

shows an enlarged view of section B of Fig. 3.

DETAILED DESCRIPTION OF EMBODIMENTS

[0033] Figure 1 is a perspective view of a double knob locking cylinder 42 having an inner doorknob 1 (inside or inner knob) and an outer doorknob 2 (outside or outer knob). The locking cylinder 42 comprises a lock bit 3 which is at least partially rotatable around the rotational or longitudinal axis of the locking cylinder, i.e., around the longitudinal axis extending through the locking cylinder and the doorknobs 1 and 2.

[0034] Electronic components may be arranged solely in the outer knob 2, solely in the inner knob 1 or in the inner knob 1 and the outer knob 2. Electronics may also be located in the housing of the locking cylinder.

[0035] A receiving antenna and optionally additional electronic components may be arranged in the inner knob 1. In such an embodiment it is preferred to use an active transponder which transmits the electromagnetic signals from outside through the door to the inner knob 1. According to a preferred embodiment, a receiving antenna and optionally additional electronic components may be arranged in the outside knob 2. In such an embodiment, passive transponders can be used, and no electronic components are necessary in the inner knob 1.

[0036] An actuator for coupling and decoupling a knob, preferably the outer knob 2, with the shaft and therefore with the locking bit 3 may be arranged in the outer knob or within the body part or housing of the cylinder, which is illustrated as profile cylinder. For instance, in a deactivated actuator state there is no (torque transmitting) coupling between the outer knob 2 and the locking bit 3, such that the outer knob 2 is free rotatable (in both directions) without transmitting any (sufficient) forces/torque to the locking bit 3. A lock cannot be locked or unlocked. For locking or unlocking the lock, a transponder is located next to the outer knob 2 such that a signal is transmitted from the transponder to the electronics in the outer knob 2. The signals are verified by means of the electronics and in case of successful verification or authentication is detected, the actuator is activated to couple the outer knob 2 with the locking bit 3 such that a rotational movement of the outer knob 3 results in a rotational movement of the locking bit 3; torque is transmitted and the lock can be locked and unlocked.

[0037] In this embodiment, the inner knob 1 is comprises the one-way clutch mechanism of the present invention such that rotation of the inner knob 1 in the counterclockwise direction results in a rotation of the locking bit 3, i.e., the locking bit 3 also rotates counterclockwise (see arrow in Fig. 1).

[0038] Figure 2 shows a side cross-sectional view of an inside (room inside) knob 1 of the present invention with a one-way clutch, ratchet or freewheel mechanism. The knob 1 comprises an outer surface layer 16, preferably formed from a thin sheet of metal, providing an outer surface which is tangible by a user for rotating the knob 1. The knob 1 comprises inside the outer surface layer 16 a first knob part 11 and a second knob part 12, wherein the outer surface layer 16 is preferably fixedly mounted to the first knob part 11. The first knob part 11 is preferably arranged rotatable with respect to the second knob part 12. The second knob part 12 is preferably fixedly connected to the cylinder shaft or cylinder core 15 which is fixedly mounted to the locking bit 3 (see Fig. 1). Thus, the one-way clutch mechanism is provided between the first knob part 11 and the second knob part 12, as shown in further detail in Figs. 3 and 4, which are cross-sectional view along line A-A of Fig. 2.

[0039] Fig. 3 shows the inner cylinder shaft 15 with the second knob part 12 fixedly mounted on the inner shaft 15. The one-way clutch mechanism is switchable between clockwise and counterclockwise free rotation, wherein the switching is achieved by means of a control disc 20. In particular, the control disc 20 is arranged rotatable between a first and second position within the knob 1, wherein the first position deactivates a first locking element 31 and activates a second locking element 32. In case the control disc 20 is rotated to the second position, the first locking element 31 is activated but the second locking element 32 is deactivated. This embodiment shows one locking element for free rotating clockwise and one control element for free rotating counterclockwise. The present invention is, however, not limited to one locking element for each direction.

[0040] The control disc comprises a cam part 21 which gets into contact with the first locking element 31 in a first position. As shown in Figs. 3 and 4, the locking elements are preferably provided as pawls 31 and 32.

[0041] In case the control disc 20 is rotated to the second position, the cam part 21 gets into contact with the second locking element (pawl) 32 such that the locking element 32 in contact with the cam part 21 is deactivated. Fig. 3 shows cam part 21 on the "right side" in contact with the right locking element, which is the second locking element 32. Rotation of the control disc 20 is achieved by rotating adjusting gear 25, which is preferably an external gear. Said adjustment gear 25 engages with the control disc 20, which provides a recess with internal gears 26. A person skilled in the art will appreciate that the engagement between gear 25 and disc 20 could also be achieved by other arrangements, e.g., by providing also an external gear part at disc 20. By rotating the adjustment gear 25, the control disc 20 can be rotated between the two positions for activating/deactivating the respective locking elements 31, 32.

[0042] As shown in Fig. 2, there is preferably a small access channel 14 at the back side of the knob 1, i.e., the side of the knob which is directed to the door in the mounted state. Said access channel 14 is configured to insert a suitable tool, e.g., in form of a hexagon shaft (e.g., Allen key^®), to rotate gear 25 and therefore switching the free running direction of the one-way clutch. Providing the access channel 14 at the back side of the knob 1 allows adjustment of the one-wheel clutch mechanism before the lock cylinder 42 is installed in the mortise lock but prevents that the mechanism is manipulated when the locking cylinder is installed in the mortise lock.

[0043] The second knob part 12, which is fixedly mounted to the inner shaft 15 of the locking cylinder comprises at the outer circumferential surface radially oriented protrusions and radially oriented depressions, which may be formed as asymmetric teeth of a ratchet or may be formed in any other appropriate way. For instance, Figs. 3 and 4 show half circle depressions 121 and protrusions 122 which provide engaging shoulders for one end of each pawl 31 and 32. The radial inner surface of the first knob part 11 provides similar geometries, e.g., radial depressions 111 and radial protrusions 112 with shoulders for engaging with the other end of the respective pawl 31, 32.

[0044] For instance, when the knob of Fig. 3 is rotated by a user in the clockwise direction (see arrow), the first (radial outer) knob part 11 rotates clockwise in the unrestricted (i.e., forward) direction. The control disc 20 preferably rotates together with the first knob part 11 such that pawl 32 is deactivated, e.g., pressed radially outward such that a first end of the pawl 32 will not get in contact with the protrusion 122 of the second (radial inner) knob part 12, even in case the knob part 11 rotates.

[0045] On the other hand, the pawl 31 is activated and allowed to move radially in and out, e.g., allowed to get into engaging contact with a protrusion 122 of the second knob part 12 such that rotation the first knob part 11 in the counterclockwise direction transfers torque to the second knob part 12. In particular, a first end of pawl 31 is in engaging contact with a protrusion 112 of the first knob part 11 and the opposite end of pawl 31 is in engaging contact with a protrusion 122 of the second knob part 12. Preferably, spring element 33 biases the pawl 31 in such a position that the pawl 31 engages with the corresponding protrusions of the first and second knob parts.

[0046] However, in case the knob 1 of Figs. 3 and 4 is rotated in the clockwise direction, the biased pawl 31 easily slides up and over the gently edges of the depressions and protrusions, wherein spring element 33 forcing it (often with an audible 'click') into the depression between the protrusions 122 as it passes each protrusion. When the first knob part 11 rotates again in the opposite direction (here: counterclockwise), however, the pawl 31 will catch against an edge of the protrusion 122, such that the applied force to the knob 1 is transferred to the central shaft 15 and consequently transferred to the locking bit 3. Preferably the free running direction is the "locking" direction such that the lock cannot be locked by rotating knob 1. On the other hand, turning the knob 1 in the unlocking direction, the rotational forces are always transferred to the locking bit 3 such that unlocking is always possible.

[0047] The term "essentially" is to be understood in the present application in such a manner that two embodiments are covered at a time, namely the equivalent and the exact. For example, the term "essentially cylindrical" covers approximately cylindrical shapes as well as exactly cylindrical shapes.

Claims

1. Rotatable knob (1) for a locking cylinder (42), the rotatable knob (1) having a one-way clutch mechanism which provides torque transfer from the knob (1) to a rotatable shaft (15) of the locking cylinder (42) depending on the rotation direction of the knob (1),

said shaft (15) being fixedly connected with a locking bit (3) of the locking cylinder,

wherein rotation of the knob (1) in a first direction transfers torque to the shaft (15) such that the locking bit (3) rotates with the knob (1), and

rotation of the knob (1) in the opposite torque-free direction does not transfer enough torque to the shaft (15) such that the locking bit (3) does not rotate with the knob (1) in a lock environment.

2. The knob (1) according to claim 1, wherein the one-way clutch mechanism comprises at least two pawls (31, 32), one pawl for the torque-free direction clockwise and the other pawl for the torque-free direction counterclockwise.

3. The knob according to claim 1 or 2, wherein the torque-free direction of the one-way clutch mechanism is switchable between clockwise and counterclockwise.

4. The knob according to claim 3, wherein an access channel (14), preferably at a back side of the knob (1), is configured to insert a tool for rotating a control disc (20) of the one-way clutch mechanism to activate or deactivate a pawl (31, 32) of the clutch mechanism.

5. The knob according to any of claims 2 to 4, wherein the knob (1) comprises a first knob part (11) and a second knob part (12),
wherein the first knob part (11) is fixedly connected to an outer surface of the knob (1) and the second knob part is fixedly connected to the shaft (15) and one of the pawls (31, 32) engages with the first knob part (11) and second knob part (12) in case the knob (1) is rotated against the torque-free direction.

6. The knob according to claim 5, wherein the first knob part (11) comprises radially oriented protrusions (112) and radially oriented depressions (111); and

the second knob part (12) comprises radially oriented protrusions (122) and radially oriented depressions (121);

wherein the one pawl (31, 32) engages with shoulders between the depressions (111, 121) and the protrusion (112, 122) in case the knob (1) is rotated against the torque-free direction.

7. The knob according to claim 6, wherein the one of the pawls (31, 32) slides at least over the protrusions (122) in case the knob (1) is rotated in the torque-free direction.

8. A locking cylinder with a knob (1) according to any of the preceding claims mounted on one end of the locking cylinder (42).

9. The locking cylinder of claim 8, wherein the knob (1) is a room inside knob and

i) undetachable mounted to the locking cylinder (42), or

ii) detachable mounted to the locking cylinder (42).

10. The locking cylinder of claim 9, wherein the locking cylinder (42) is electronic locking cylinder comprising a second knob (2) which is a room outside knob.

Ansprüche

1. Drehknauf (1) für einen Schließzylinder (42), wobei der Drehknauf (1) einen Einwegkupplungsmechanismus aufweist, der eine Drehmomentübertragung vom Knauf (1) auf eine Drehwelle (15) des Schließzylinders (42) in Abhängigkeit von der Drehrichtung des Knaufs (1) bereitstellt,

wobei die Welle (15) fest mit einem Schließbart (3) des Schließzylinders verbunden ist,

wobei die Drehung des Knaufs (1) in einer ersten Richtung ein Drehmoment auf die Welle (15) überträgt, so dass sich der Schließbart (3) mit dem Knauf (1) dreht, und

die Drehung des Knaufs (1) in die entgegengesetzte, drehmomentfreie Richtung nicht genügend Drehmoment auf die Welle (15) überträgt, so dass sich der Schließbart (3) nicht mit dem Knauf (1) in einer Verriegelungsumgebung dreht.

2. Knauf (1) nach Anspruch 1, wobei der Einwegkupplungsmechanismus mindestens zwei Sperrklinken (31, 32) aufweist, eine Sperrklinke für die drehmomentfreie Richtung im Uhrzeigersinn und die andere Sperrklinke für die drehmomentfreie Richtung gegen den Uhrzeigersinn.

3. Knauf nach Anspruch 1 oder 2, wobei die drehmomentfreie Richtung des Einwegkupplungsmechanismus zwischen Uhrzeigersinn und gegen Uhrzeigersinn umschaltbar ist.

4. Knauf nach Anspruch 3, wobei ein Zugangskanal (14), vorzugsweise an einer Rückseite des Knaufs (1), so konfiguriert ist, dass ein Werkzeug zum Drehen einer Steuerscheibe (20) des Einwegkupplungsmechanismus eingeführt werden kann, um eine Sperrklinke (31, 32) des Kupplungsmechanismus zu aktivieren oder zu deaktivieren.

5. Knauf nach einem der Ansprüche 2 bis 4, wobei der Knauf (1) einen ersten Knaufteil (11) und einen zweiten Knaufteil (12) aufweist, wobei der erste Knaufteil (11) fest mit einer Außenfläche des Knaufs (1) und der zweite Knaufteil fest mit der Welle (15) verbunden ist und eine der Sperrklinken (31, 32) mit dem ersten Knaufteil (11) und dem zweiten Knaufteil (12) in Eingriff steht, wenn der Knauf (1) entgegen der drehmomentfreien Richtung gedreht wird.

6. Knauf nach Anspruch 5, wobei der erste Knaufteil (11) radial ausgerichtete Vorsprünge (112) und radial ausgerichtete Vertiefungen (111) aufweist;
und

der zweite Knaufteil (12) radial ausgerichtete Vorsprünge (122) und radial ausgerichtete Vertiefungen (121) aufweist;

wobei die eine Sperrklinke (31, 32) mit Ansätzen zwischen den Vertiefungen (111, 121) und dem Vorsprung (112, 122) in Eingriff steht, wenn der Knauf (1) entgegen der drehmomentfreien Richtung gedreht wird.

7. Knauf nach Anspruch 6, wobei die eine der Sperrklinken (31, 32) mindestens über die Vorsprünge (122) gleitet, wenn der Knauf (1) in die drehmomentfreie Richtung gedreht wird.

8. Schließzylinder mit einem Knauf (1) nach einem der vorhergehenden Ansprüche, der an einem Ende des Schließzylinders (42) montiert ist.

9. Schließzylinder nach Anspruch 8, wobei der Knauf (1) ein Rauminnenknauf ist,
und

i) unlösbar am Schließzylinder (42) montiert oder

ii) lösbar am Schließzylinder (42) montiert ist.

10. Schließzylinder nach Anspruch 9, wobei der Schließzylinder (42) ein elektronischer Schließzylinder ist, der einen zweiten Knauf (2) aufweist, der ein Raumaußenknauf ist.

Revendications

1. Bouton rotatif (1) pour un cylindre de verrouillage (42), le bouton rotatif (1) ayant un mécanisme d'embrayage unidirectionnel qui fournit un transfert de couple du bouton (1) à une tige rotative (15) du cylindre de verrouillage (42) selon le sens de rotation du bouton (1),

ladite tige (15) étant reliée de manière fixe à une dent de verrouillage (3) du cylindre de verrouillage,

dans lequel la rotation du bouton (1) dans un premier sens transfère le couple à la tige (15) de sorte que la dent de verrouillage (3) tourne avec le bouton (1), et

la rotation du bouton (1) dans le sens sans couple opposé ne transfère pas suffisamment de couple à la tige (15) de sorte que la dent de verrouillage (3) ne tourne pas avec le bouton (1) dans un environnement de verrouillage.

2. Bouton (1) selon la revendication 1, dans lequel le mécanisme d'embrayage comprend au moins deux cliquets (31, 32), un cliquet pour le sens horaire sans couple et l'autre cliquet pour le sens antihoraire sans couple.

3. Bouton selon la revendication 1 ou 2, dans lequel le sens sans couple du mécanisme d'embrayage unidirectionnel est commutable entre le sens horaire et le sens antihoraire.

4. Bouton selon la revendication 3, dans lequel un canal d'accès (14), de préférence sur un côté arrière du bouton (1), est configuré pour insérer un outil pour faire tourner un disque de commande (20) du mécanisme d'embrayage unidirectionnel pour activer ou désactiver un cliquet (31, 32) du mécanisme d'embrayage.

5. Bouton selon l'une quelconque des revendications 2 à 4, dans lequel le bouton (1) comprend une première partie de bouton (11) et une seconde partie de bouton (12),
dans lequel la première partie de bouton (11) est reliée de manière fixe à une surface externe du bouton (1) et la seconde partie de bouton est reliée de manière fixe à la tige (15) et l'un des cliquets (31, 32) s'engage avec la première partie de bouton (11) et la seconde partie de bouton (12) dans le cas où le bouton (1) est tourné en sens inverse du sens sans couple.

6. Bouton selon la revendication 5, dans lequel la première partie de bouton (11) comprend des protubérances orientées radialement (112) et des dépressions orientées radialement (111); et

la seconde partie de bouton (12) comprend des protubérances orientées radialement (122) et des dépressions orientées radialement (121);

dans lequel le premier cliquet (31, 32) s'engage avec des épaulements entre les dépressions (111, 121) et la protubérance (112, 122) dans le cas où le bouton (1) est tourné en sens inverse du sens sans couple.

7. Bouton selon la revendication 6, dans lequel l'un des cliquets (31, 32) glisse au moins sur les protubérances (122) dans le cas où le bouton (1) est tourné dans le sens sans couple.

8. Cylindre de verrouillage avec un bouton (1) selon l'une quelconque des revendications précédentes monté sur une extrémité du cylindre de verrouillage (42).

9. Cylindre de verrouillage selon la revendication 8, dans lequel le bouton (1) est un bouton à l'intérieur d'une pièce et

i) monté de manière non amovible sur le cylindre de verrouillage (42), ou

ii) monté de manière amovible sur le cylindre de verrouillage (42).

10. Cylindre de verrouillage selon la revendication 9, dans lequel le cylindre de verrouillage (42) est un cylindre de verrouillage électronique comprenant un deuxième bouton (2) qui est un bouton à l'extérieur d'une pièce.

Drawing