EP3061893B1 - Key for a lock cylinder and locking device - Google Patents

Description

The present invention relates to a key for a lock cylinder, the key having a key shaft extending along a longitudinal direction with two opposing wrench broad side surfaces, the key shaft having a recess through the wrench broad side surfaces, a shaft extending through the recess transverse to the longitudinal direction, and wherein the shaft is rotatably mounted in the key shaft. Furthermore, the present invention relates to a locking device with a key and a lock cylinder.

Such key and lock cylinder are for example from the document DE 100 58 590 C1 known.

This document shows a key for a lock cylinder with a co-operating with the core pins of the lock cylinder keyhole shank, in which a spacer is movably mounted, the direction of movement is inclined by an angle of about 45 ° to the key broadside. In this case, the spacer is a arranged in a slanted slot of the key bit ring, which is interspersed with a stuck in an oblique bore of the key broadside side pin with movement play.

Such keys with movable elements are basically known in the art. They serve to increase the counterfeit security of the key. Furthermore, they serve to increase the security of an existing from the key and an associated lock cylinder locking device. The movable elements increase the possibility of safety-related queries in the lock cylinder and thus increase the security against unauthorized unlocking of the lock cylinder.

For example, further shows the document EP 1 662 077 A1 a key with a movably arranged ring rotatably mounted on a pin.

Furthermore, the documents show DE 699 16 570 T2 and DE 699 20 530 T2 a key in which also a ring is rotatably mounted on a shaft.

In addition, the document shows EP 2 754 792 A1 another key with a recess, wherein a plurality of waves extend transversely through the recess and the key shank, and wherein on each shaft exactly one ring is rotatably mounted without play.

Furthermore, the document shows FR 2 762 345 A1 a key with two recesses, wherein each of the recesses is penetrated by a respective shaft and in each of the recesses a single movable element is arranged.

The publication WO 2009/012541 A1 shows another cylinder lock and an associated key and a key blank for it.

The publication EP 2 930 290 A1 shows a lock-key system and is post-published prior art according to Article 54 (3) EPC.

Based on this prior art, it is an object of the present invention to provide an improved key and an improved locking device, which allow a higher security of the locking device against unauthorized unlocking and increase the security of the key against unauthorized duplication.

According to a first aspect of the invention, therefore, a key is provided for a lock cylinder, the key having a keyway extending along a longitudinal direction with two key broadside faces, the key shank having a recess through the key broadside faces, with a shaft, in particular transverse to the longitudinal direction , Through the recess extends, and wherein the shaft is rotatably mounted or mounted in the key shaft, and wherein in the recess two rings are arranged on the shaft side by side. In particular, an inner diameter of each ring is greater than an outer diameter of the shaft, in particular a largest outer diameter of the shaft. Furthermore, the key has exactly two rings, and the rings are symmetrical in each case to a rotational symmetry axis, and formed asymmetrically relative to a ring center plane perpendicular to the rotational axis of symmetry.

The term "ring" refers to a rotationally symmetric element with a constant annular cross-section, an outer diameter and an inner diameter. The inner diameter indicates the diameter of the opening through the ring. The ring cross-section can in principle be configured arbitrarily, for example, also asymmetrically to a so-called ring center plane. In this case, the ring center plane denotes a plane running perpendicular to a rotational symmetry axis at half the width of the ring. The inner diameter of the ring is larger than an outer diameter of the shaft. The shaft - which can also be referred to as a pin or bolt - does not necessarily have to be rotationally symmetrical. For example, an outer circumference of the shaft may have a circular cross section. For example, an outer circumference of the shaft can also have an elliptical cross section. The term "outer diameter" thus indicates the largest outer diameter of the outer circumference of the shaft. In other words, it is the diameter of an outer circle around the outer circumference of the shaft. If the outer peripheral contour of the shaft is circular, the outer diameter is constant and thus corresponds to the largest outer diameter of the shaft. Consequently, the ring can rotate about the shaft and is supported by a play on the shaft, which allows a movement of the ring also translational relative to the shaft.

There are at least two rings arranged side by side on the shaft. In particular, the rings are each arranged directly next to one another. "Side by side" means that the rings are adjacent, in particular immediately adjacent to each other. There are thus no sleeve elements, spacers or other elements between the rings. The rings can in particular rest against each other. It goes without saying that a certain amount of play is maintained in order to allow rotation of the rings relative to one another or a translational movement of the rings relative to one another. The at least two rings are on the common Wave arranged side by side. The inventive design, the rings can rotate independently of one another on the shaft. Furthermore, the rings can be moved independently of each other perpendicular to a longitudinal axis of the shaft. This is made possible because its inner diameter is larger than the outer diameter of the shaft. The extent to which a ring can be moved perpendicular to the longitudinal axis of the shaft is measured by how much larger the inner diameter of the ring is than the outer diameter of the shaft. In particular, the inner diameter of the ring can be 1.25 times the outer diameter of the shaft, in particular 1.5 times, in particular 2 times, more preferably 2.5 times.

In particular, the shaft extends "transversely" to the longitudinal direction through the recess. The shaft can thus extend perpendicular to the longitudinal axis or at an angle α with 0 <α <90 to the longitudinal direction, for example, an angle α = 45 ° is possible.

The arrangement of two rings next to each other on the same shaft makes it possible to interrogate the two rings separately in locking fuses, in particular pin tumblers. Only if both rings are successfully interrogated and deflected separately, can each of the assigned locking fuses be unlocked. To provide two rings directly adjacent or side by side, on the one hand can increase the safety of the locking device, on the other hand, as will be explained in more detail below, the property as a reversible key can be maintained. The possibility of duplicating the key without authorization also increases security. By means of conventional machines for reworking key profiles and key incisions, scanning of the key is first carried out, for example, in the context of 3D printing methods, in order to be able to capture and emulate the features of the key. Although movable elements can be detected statically, they can not be read with regard to their mobility. The proposed key complicates this by the arrangement of two rings next to each other on the same shaft in addition, since the two rings can not be easily detected as separate movement elements that can move independently. However, the proposed key makes it possible to separate the at least two rings separately and in particular also in different ways, that is, for example in different directions, to deflect relative to each other and query safety relevant.

According to a further aspect of the invention there is provided a locking device with a key according to the first aspect of the invention or one of its embodiments and with a lock cylinder, the lock cylinder having a housing and a cylinder core, the lock cylinder having a plurality of at least the number of rings Locking devices, in particular pin tumblers, wherein each locking device, in particular pin tumbler, is movable between a locked state and a release state and locks a rotational movement of the cylinder core relative to the housing in the locked state and releases in the release state, each ring one of the locking fuses, in particular pin tumblers, is assigned, and wherein the lock cylinder is converted by fully inserting the key into a keyway of the cylinder core from the lock state to the release state, wherein the cylinder core for each Ring has one of the respective locking device, in particular Stiftzuhaltung, associated support pin, and wherein by inserting each of the rings between the respective associated support pin and the respective associated locking device, in particular Stiftzuhaltung, the respective associated locking device, in particular Stiftzuhaltung, is movable into the release state.

Furthermore, it is provided that the key has exactly one first ring and one second ring, wherein the lock cylinder has at least one first locking device associated with the first ring, in particular pin tumbler, and a second locking catch, in particular pin tumbler, assigned to the second ring, wherein the cylinder core one of the first locking device, in particular pin tumbler, associated first support pin and one of the second locking device, in particular Stiftzuhaltung, associated second support pin, wherein the first support pin in the release state, the first ring against the first locking device, in particular Stiftzuhaltung supported, and wherein the second Support pin in the release state, the second ring against the second locking device, in particular Stiftzuhaltung supported.

By means of the proposed locking device, it is possible, due to the at least the number of rings corresponding plurality of locking fuses, each of the rings individually or interrogate the rings separately from each other. The majority of locking fuses equal at least the number of rings. This means that a blocking fuse is assigned for each of the rings. In particular, however, further locking devices or pin tumblers can be provided for interrogating other features of the key in the locking device. A "support pin" refers to a pin which is fixedly arranged in the cylinder core, for example by pressing. The pin is thus not movable and deflects the respective associated ring in the fully inserted position of the key. He then supports the ring against the respective associated locking device or pin tumbler, so that the locking device or pin tumbler is moved by means of the supported via the support pin ring in the release state. Instead of the term "support pin", for example, the term "deflection pin" can be used. The locking device is thus movable from the locked state to the release state only when the key actually has a corresponding number of separate rings on the shaft which can be deflected independently by the support pins. The safety of the locking device is thus further increased.

In this case, the embodiment with exactly two rings thus at least two locking devices are provided. The first blocking fuse is assigned to the first ring, the second blocking fuse is assigned to the second ring. The locking devices can each be a pin tumbler. Furthermore, one of the first locking fuse assigned first support pin is arranged on one of the first locking fuse opposite side of the key channel. Correspondingly, a second support pin is arranged on a side of the key channel opposite the second locking fuse. In the fully inserted position of the key in the keyway supports a respective support pin from the corresponding ring and deflects it in the direction of the opposite locking fuse. In this way, the locking fuse is moved and goes into the release state.

The object initially posed is thus completely solved.

In this embodiment, exactly two rings are thus provided, which are arranged adjacent to each other on the shaft. Except for a common game, the rings are directly adjacent to each other. The rings can rotate relative to each other on the shaft and be translationally moved relative to the shaft. The two ring design provides the advantages of the present invention and moreover provides a simple structure which, due to the even number of rings, simplifies a symmetrical arrangement on the shaft and provides the key as a reversible key.

In a further embodiment of the key can be provided that the rings are identical. In particular, the rings can have an identical shape and dimensions.

In principle, it is possible that the rings are formed differently from each other. However, to simplify the manufacture of the individual elements of the key and to provide the key as a reversible key, it may be provided that the rings are identical. The ring cross sections are formed asymmetrically to a ring center plane.

According to the invention, the rings are symmetrical in each case to a rotational symmetry axis, and formed asymmetrically relative to a ring center plane extending perpendicular to the rotational axis of symmetry. In this case, in particular, an outer peripheral surface of the ring may be formed asymmetrically to the ring center plane.

The asymmetrical configuration may, for example, make it possible to use the ring cross-section as an additional means of interrogation. For example, such an asymmetric ring cross-section, in particular the outer peripheral surface, correspond with a corresponding recess in a key channel, so that only appropriately designed asymmetric rings allow the insertion of the key into the key channel.

In a further embodiment of the key can be provided that the recess is arranged symmetrically to a perpendicular to the key broadside surfaces and parallel to a longitudinally extending median plane of the key shaft.

The key shank has the opposing key broadside faces and two key side faces also opposite each other connecting the key broadside faces. The key shank is substantially rectangular in cross-section. The two longer sides of the rectangle are the "key broadside faces". The two shorter sides are the "key narrow side surfaces". Consequently, the center plane runs exactly in the middle between the key narrow side surfaces and parallel to them. It follows that the median plane extends parallel to the longitudinal direction. The recess is arranged symmetrically to this center plane. This means that the recess has a cross section which is symmetrical to the median plane. It is therefore exactly one half of the recess on each side of the median plane. Such a configuration allows the arrangement of the at least two rings described below symmetrical to the median plane.

In a further embodiment of the key can be provided that the rings are arranged symmetrically to a perpendicular to the key broad side surfaces and parallel to the longitudinal direction extending median plane of the key shaft.

With regard to the position of the median plane, the above applies. The rings are in this case symmetrically aligned with the median plane. Exactly two rings are present, with one ring arranged on each side of the median plane.

In a further embodiment of the key can be provided that in each case one of the rings is arranged on each side of a perpendicular to the Schlüsselbreitseitenflächen and parallel to the longitudinal direction extending median plane of the key shaft.

This designates the case according to the invention that exactly two rings are provided. One of the rings is then arranged on each side of the median plane. In this way, the key can be designed as a reversible key. Regardless of its orientation in the key channel each one of the rings is arranged on each side of the median plane and can actuate a corresponding locking fuse.

In a further embodiment of the key can be provided that the rings are arranged in mirror image to each other on the shaft. In particular, the rings can be arranged in mirror image to the median plane.

As described above, the rings each have an asymmetric ring cross section. If the rings are of identical design, however, they may, despite everything, be arranged symmetrically with respect to the median plane. Their ring cross-sections are then arranged symmetrically or mirror-inverted with respect to the median plane. The two rings are then arranged so to speak "back to back" on the shaft.

In one embodiment of the key can be provided that the recess is dimensioned such that the rings are guided perpendicular to the Schlüsselbreitseitenflächen and rotatable on the shaft.

In other words, the recess surrounds the rings with some play that allows rotation and movement of the rings perpendicular to the key wide side surfaces but prevents movement parallel to the key wide side surfaces beyond play. The usual clearance may be, for example, 0.05 mm, 0.1 mm or 0.2 mm on each side.

Thus, it can be provided in one embodiment of the key that a width of the recess is slightly larger than a total width of juxtaposed rings, so that a guided through the recess and the respective other ring movement of each ring is made possible perpendicular to the Schlüsselbreitseitenflächen. Further, a length of the recess parallel to the longitudinal direction may be slightly larger than a respective outer diameter of the rings.

In each case stated above, for example, the length of the recess by 0.05 mm or 0.1 mm or 0.2 mm or 0.3 mm or 0.4 mm be greater than a respective outer diameter of the rings. In other words, the length of the recess may be formed by 0.05 mm to 0.4 mm larger than the respective outer diameter of a ring. Accordingly, the width of the recess may be 0.05 mm to 0.4 mm, in particular 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm or 0.4 mm, larger than a total width of the juxtaposed Rings are formed. This total width thus denotes the sum of the widths of the individual rings. For example, if exactly two rings are provided, which are identical, then the total width is exactly twice the width of a single ring.

In a further embodiment of the key can be provided that the shaft is arranged parallel to the key broadside surfaces in the key shank.

In other words, in this case, the shaft is not inclined in the key shank but a longitudinal axis of the shaft extends parallel to the key broadside side surface. It then follows that the rings are arranged perpendicular to the Schlüsselbreitseitenflächen. In this way, a symmetrical arrangement of the rings is simplified to a median plane of the key shaft and the provision as a reversible key.

In a further embodiment of the key, provision may be made for the key shank to have at least one longitudinal groove extending parallel to the longitudinal direction in at least one of the key-width-side faces.

In principle, of course, at least one longitudinal groove can be provided in each of the broad side surfaces. In the case of a reversible key, for example, this must be provided. By means of the longitudinal grooves, the cross-sectional profile of the key bit can be adjusted and further queries are made possible, for example, by appropriate embodiments of a cross-sectional profile of a key channel in a cylinder core of the lock cylinder.

In a further embodiment of the key, it can be provided that the key shank has at least one recess for interrogating a profile pin in at least one of the key broadside side surfaces.

In this way, by means of the indentation and another security feature in the key can be implemented to further increase the security of the key.

In a further embodiment, it can be provided that the recess is arranged in a front third, in particular a front quarter, of the key shaft facing away from a key head.

In this way, it is achieved that the rings must be inserted deep into the keyway to fully insert the key in a cylinder core of a lock cylinder. As a result, for example, the mobility of the rings queried be by passing the rings each have a labyrinth during insertion of the key in the lock cylinder. In this way, the safety of the locking device provided by the key can be further increased.

In a further embodiment it can be provided that the key is designed as a reversible key.

The training as a reversible key is characterized in that the orientation in which the key is inserted into the key channel, does not matter. It can be provided, for example, by a symmetrical, in particular a point-symmetrical, embodiment of the safety-relevant features of the key shaft relative to a median plane of the key shaft. Of course, the key can also be designed as Nlchtwendschlüssel.

In a further embodiment of the key can be provided that the shaft extends through the entire key shaft, and wherein the key shank has two opposite key narrow side surfaces, and wherein each key narrow side surface has an opening for pressing the shaft.

In this way, a mounting of the shaft and the rings is significantly simplified. The rings can be held in the recess and then mounted by pressing the shaft from the outside. Alternatively, it can also be provided that the key has an opening only on one of the key narrow side surfaces. In particular, this opening can then be designed as a blind hole.

In a further embodiment of the key can be provided that an outer diameter of each ring is greater than a distance between the key broadside faces.

In this way, each ring protrudes in each case from the cross-sectional profile of the key shaft. In this way, for example, it can be ensured that an outer cross-sectional contour of each ring must be queried when inserted into a key channel.

In a further embodiment of the key, it can be provided that the key shank has at least one tip depression in at least one of the key broadside side surfaces, and wherein the at least one tip depression adjoins the recess.

In this way, further safety-relevant features can be provided and, moreover, the deflection of the rings can be simplified by means of corresponding support pins without these colliding with the key broadside side surface. Also, the apertures provided by the at least one tip recess serve the edges of the recess to simplify, for example, a better sliding of provided in the lock cylinder profiled pins.

In a further embodiment of the locking device can be provided that the first support pin and the second support pin are arranged on opposite sides of the keyway.

In this way, it follows that upon movement into the release state, the two rings are deflected in the opposite direction. This causes the relative mobility of the rings to each other and increases the safety of the locking device.

In a further embodiment of the closure device can be provided that the first support pin and the second support pin are arranged on the same side of the keyway.

In this case, the first support pin and the second support pin in particular may protrude differently far into the keyway. In particular, the first support pin and the second support pin arranged on the same side of the key channel can be designed such that they effect a deflection of the first ring, which is different from a deflection of the second ring. In particular, the distances by which the first ring and the second ring are deflected can be of different lengths.

In a further embodiment of the closing device can be provided that the first support pin and the second support pin are arranged obliquely to the keyway. In particular, it may be provided that the first support pin and the second support pin are each arranged at an angle of 45 ° relative to the keyway. In this way, another security feature can be provided. In order to deflect a ring accordingly, this has to have an outer peripheral surface which can not catch on a support pin or a profile pin. For example, at an angle of the support pin of 45 ° to the keyway, an outer circumferential contour of also 45 ° or a semicircular outer peripheral contour may be provided on a respective ring to be deflected along the corresponding support pin without jamming.

According to a further embodiment of the locking device, the keyway has a plurality of longitudinal grooves corresponding at least to the number of rings, wherein each ring is assigned a longitudinal groove whose cross-sectional contour is complementary to an outer cross-sectional contour of the respective ring.

In this way, the outer cross-sectional contour of the ring serve as a further security feature, which is queried by means of the key channel. The respective ring then rolls during the insertion of the key in the respective complementary cross-sectional contour of the keyway and is deflected or deflected at the end by the respective support pin. In this way, a labyrinth can be formed, which serves as another security feature.

In a further embodiment it can be provided that the first ring is associated with a first longitudinal groove and the second ring is associated with a second longitudinal groove, and wherein the first longitudinal groove and the second longitudinal groove are formed in opposite surfaces of the keyway.

In this way, oppositely extending labyrinths for the first ring and the second ring are formed. Upon insertion of the key into the lock channel, the rings are deflected in different directions to release the advance of the key into the key channel. At the end they are then deflected by the opposing support pins in opposite directions. In this way, the mobility of the two rings is queried opposite each other and in both directions based on an undeflected position, which further increases security. It can also be provided that the first ring is associated with a first longitudinal groove and the second ring is associated with a second longitudinal groove, and wherein the first longitudinal groove and the second longitudinal groove are formed in the same surface of the keyway. This embodiment can be provided in particular if both support pins are arranged on the same side of the key channel.

Fig. 1

eine isometrische Ansicht auf eine Ausführungsform eines Schlüssels,

Fig. 2

eine entgegengesetzt isometrische Ansicht des Schlüssels in Fig. 1,

Fig. 3

eine Draufsicht auf den Schlüssel in der Fig. 2,

Fig. 4

eine Querschnittsansicht entlang einer Linie IV-IV in Fig. 3,

Fig. 5

eine Querschnittsansicht entlang einer Linie V-V in Fig. 3,

Fig. 6

eine Seitenansicht eines einzelnen Rings,

Fig. 7

eine Querschnittsansicht, in der der Ring in einer Ringmittelebene geschnitten ist,

Fig. 8

eine isometrische Ansicht eines Rings,

Fig. 9

eine geschnittene isometrische Ansicht eines Rings,

Fig. 10

eine Baugruppendarstellung zweier Ringe auf einer Welle, wobei in gestrichelten Linien eine Aussparung in der Draufsicht dargestellt ist,

Fig. 11

eine isometrische Ansicht der entgegengesetzt zueinander ausgelenkten Ringe, wenn sie senkrecht zu der in Fig. 10 dargestellten Zeichnungsebene ausgelenkt sind,

Fig. 12

eine Explosionsdarstellung zur Erläuterung einzelner Elemente des Schlüssels und der Schließvorrichtung,

Fig. 13

eine isometrische Darstellung einer zusammengebauten Schließvorrichtung,

Fig. 14

eine Seitenansicht der Schließvorrichtung in Fig. 13,

Fig. 15

eine Querschnittsansicht der Schließvorrichtung entlang einer Linie XV-XV in Fig. 14,

Fig. 16a

eine Draufsicht in Richtung des Pfeils XVI in Fig. 13, wobei kein Schlüssel im Schlüsselkanal angeordnet ist, um dessen Profilquerschnitt zu verdeutlichen, die

Fig. 16b

Ringe befinden sich in einem in den Schlüsselkanal eingeführten Zustand am Beginn des Schlüsselkanals, eine Draufsicht in Richtung des Pfeils XVI in Fig. 13, wobei kein Schlüssel im Schlüsselkanal angeordnet ist, um dessen Profilquerschnitt zu verdeutlichen, die Ringe befinden sich hier in einem aus- bzw. umgelenkten Zustand,

Fig. 17

freigeschnittene Elemente der Schließvorrichtung, um eine Auslenkung der Ringe zur Bereitstellung des Freigabezustands zu verdeutlichen, und

Fig. 18

eine isometrische Darstellung der Anordnung in Fig. 17.

Embodiments of the invention are illustrated in the drawings and will be explained in more detail in the following description. Show it:

Fig. 1

an isometric view of an embodiment of a key,

Fig. 2

an opposite isometric view of the key in Fig. 1 .

Fig. 3

a top view of the key in the Fig. 2 .

Fig. 4

a cross-sectional view taken along a line IV-IV in Fig. 3 .

Fig. 5

a cross-sectional view along a line VV in Fig. 3 .

Fig. 6

a side view of a single ring,

Fig. 7

a cross-sectional view in which the ring is cut in a ring center plane,

Fig. 8

an isometric view of a ring,

Fig. 9

a cutaway isometric view of a ring,

Fig. 10

an assembly representation of two rings on a shaft, wherein in dashed lines a recess in the plan view is shown,

Fig. 11

an isometric view of the oppositely deflected rings when perpendicular to the in Fig. 10 are deflected illustrated drawing plane,

Fig. 12

an exploded view for explaining individual elements of the key and the locking device,

Fig. 13

an isometric view of an assembled closure device,

Fig. 14

a side view of the locking device in Fig. 13 .

Fig. 15

a cross-sectional view of the closure device along a line XV-XV in Fig. 14 .

Fig. 16a

a plan view in the direction of arrow XVI in Fig. 13 , wherein no key is arranged in the keyway to illustrate its profile cross-section, the

Fig. 16b

Rings are in an inserted into the keyway state at the beginning of the keyway, a plan view in the direction of arrow XVI in Fig. 13 , where no key is arranged in the key channel, in order to make clear its profile cross-section, the rings are here in an off or deflected state,

Fig. 17

cut elements of the closure device to illustrate a deflection of the rings to provide the release state, and

Fig. 18

an isometric view of the arrangement in Fig. 17 ,

The Fig. 1 shows an isometric view of an embodiment of a key 10. The key has a key head 12, which is also called key grain. The key head 12 is used for manual gripping of the key 10. Starting from the key head 12, a key shank 14 extends to the key shaft 14 different security features are arranged, which are queried upon insertion of the key 10 in a corresponding locking device. If the query is positive, it is possible to move the locking device from a blocking state into a release state.

The key shank 14 extends along a longitudinal direction 16. The key shank 14 has a rectangular or substantially rectangular cross-sectional profile. The two longer sides of this rectangle are called key broadside faces 18, 18 '. The two shorter sides of the rectangle in cross section are referred to below as key narrow side surfaces 20, 20 '. The key wide side surfaces 18, 18 'and the key narrow side surfaces 20, 20' are thus arranged opposite to each other. Each of the key broadside surfaces 18, 18 'may have at least one elevation 22, furthermore, at least one longitudinal groove 24 may be provided. Both the at least one elevation 22 and the at least one longitudinal groove 24 serve as further security features of the key shaft 14, which with a corresponding complementary configuration of a cross-sectional profile of a key channel the locking device cooperates to allow insertion of the key 10 only with appropriate cross-sectional profiles.

Transverse to the longitudinal direction 16 extends a shaft 26. This is pressed into the key shank 14 and thus fixed, in particular rotationally fixed, arranged in the key shank 14. On the shaft 26, two rings 28, 30 and a first ring 30 and a second ring 28 are arranged. The dimensioning of the rings 28, 30 will be explained in more detail below. An inner diameter of each of the rings 28, 30 is greater than an outer diameter of the shaft 26. This allowed play of the rings 28, 30 on the shaft 26 and thus movement of each of the rings 28, 30 relative to the shaft 26.

Consequently, a recess 32 is provided which extends through the entire key shank 14 and the key broadside surfaces 18, 18 '. The shaft 26 extends through the recess 32. In the illustrated embodiment, the recess 32 has an elongate shape and extends parallel to the longitudinal direction 16. On the shaft 26 and in the recess 32, the rings 28, 30 are arranged. With regard to the dimensioning of the recess 32 relative to the rings 28, 30 will also be explained in detail below. The recess 32 is made slightly larger than a combined width of the two rings 28, 30 and has a longitudinal extent parallel to the longitudinal direction 16, which is slightly larger than the outer diameter of the rings. In this way, the rings 28, 30 are guided with a small clearance through the recess 32. The rings, apart from the play, can not move longitudinally 16 nor move transversely to the longitudinal direction 16 on the shaft 26, except for a provided clearance. The play allows the rings 28, 30 to rotate on the shaft 26. As a result, in particular a frictional resistance is reduced by the rings 28, 30 when the key 10 is inserted. Furthermore, however, a movement perpendicular to the key broadside faces 18, 18 'or the longitudinal direction 16 and parallel to the key narrow side faces 20 is made possible. The rings 28, 30 can thus be guided separately from each other guided by the recess 32 relative to the shaft 26 and the key shank 14.

According to the invention exactly two rings 28, 30 are provided. The rings 28, 30 are arranged side by side on the shaft. That is, they do not have any spacers, sleeve members, or the like for spacing between them. The rings 28, 30 are thus directly next to each other. In the illustrated embodiment, the first ring 28 and the second ring 30 are disposed adjacent each other on the shaft 26.

The recess with the rings 28, 30 is arranged in a front third 15 of the key shaft 14. As the front third 15 hereby a key head 12 facing away from third 15 of the projecting from the key head 12 key shaft 14 is understood.

The Fig. 2 shows the key 10 in the Fig. 1 in an isometric view from the opposite perspective. Shown is thus the Schlüsselbreitseitenfläche 18 opposite Schlüsselbreitseitenfläche 18 '. Like elements are identified by like reference numerals and will not be explained again. As can be seen, each of the key narrow side surfaces 20, 20 'has an opening 42 through which the shaft 26 can be pressed into the key shank. Furthermore, in the illustrated embodiment, the key broadside surface 18 'on a plurality of recesses 34 which can be queried by profile pins of a lock cylinder and serve as further security features.

The Fig. 3 shows a plan view of the in the Fig. 2 illustrated key. Like elements are again identified with the same reference numerals and will not be explained again. In this plan view, the geometry of the recess 32 and the position of the rings 28, 30 are shown. The key 10 or the key shank 14 has a median plane 36. The center plane 36 is halfway between the key narrow side surfaces 20, 20 '. The recess 32 is arranged symmetrically to the median plane 36. In each case one of the rings 28, 30 is arranged on each side of the median plane 36. In this way, by the symmetrical arrangement of the rings 28, 30 in particular a function of the key 10 as a reversible key possible. Such a reversible key can regardless of its orientation in the key channel a Locking cause a shipment in the release state. This is provided by the corresponding configuration of the features, in particular the key broadside surfaces 18, 18 '. In this respect, corresponding features, such as depressions 34, can also be arranged opposite the key broadside face 20 in the key broadside face 20 ', even if, for illustrative reasons, they are not implemented in the illustrated embodiment in order to provide functionality as a reversible key.

Furthermore, the key broadside side surface 18 'may have at least one tip recess 38, in the illustrated embodiment, two tip recesses 38. In this case, a tip recess 38 merges into the recess 32. This makes it possible, for example, to facilitate sliding of a profile pin on an edge of the recess 32 during the insertion of the key 10.

The Fig. 4 shows a cross-sectional view taken along a line IV-IV in the Fig. 3 , Shown is a cross section along the longitudinal direction 16 in the median plane 36 through the key 10. Shown in cross section is the recess 32 and the recess 26 disposed in the recess 32, the longitudinal direction transverse to the longitudinal direction 16 and perpendicular to the median plane 36 in the illustrated embodiment extends. A distance between the key broadside faces 18 'and 18 is designated by the reference numeral 41. As can be seen, the ring 28, and also the ring 30 of identical design in the illustrated embodiment, has an outer diameter which is greater than this distance 41. Consequently, the ring 28 extends beyond the key broadside surface 18 in the in the Fig. 4 shown deflected position. The ring 28 is in the position shown in the direction of the arrow 40, which extends within the plane 36 perpendicular to the longitudinal direction 16, deflected. This movement is guided by the recess 32, which is only slightly larger, for example, 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, greater in their extension in parallel to the longitudinal direction 16 as an outer diameter of the ring 28. In this way, a deflection of the ring 28 parallel to the direction 40 is possible. The same applies to the ring 30. The two rings 28, 30 can be deflected independently of each other.

The Fig. 5 shows a cross-sectional view along a line VV in the Fig. 3 , It can be seen that the shaft 26 extends through the entire key shank 14. As already mentioned, each of the key narrow side surfaces 20 has an opening 42. In this way, the shaft 26 can be pressed transversely through the key shank 14. The remaining elements are identified by the same reference numerals and will not be explained again.

Shown further is the deflection of the rings 28, 30 in opposite directions. The ring 28 thus protrudes beyond the key broadside surface 18. The ring 30 protrudes beyond the key broadside surface 18 '. Thus, not only a rectified movement of the rings 28, 30 is possible, but movements in opposite directions. This further increases the security of a locking device that can be provided by means of the key 10.

In the Fig. 6 to 9 a single ring 28 is shown. The Fig. 6 shows a side view of the ring. The Fig. 7 shows a cross-sectional view of the ring. The Fig. 8 shows an isometric view of the ring 28 of the Fig. 6 , The Fig. 9 shows an isometric view of a cut half of the ring 28th

The ring has an inner diameter 50 and an outer diameter 52. The ring 28 is rotationally symmetrical about a rotational symmetry axis 62. At an outer periphery, the ring has an outer peripheral surface 56. A width of the ring in the Fig. 7 is designated by the reference numeral 51. On the half width of the ring is the so-called ring center plane 64. The ring 28 is formed asymmetrically with respect to the ring center plane 64. In particular, an outer peripheral surface 56 of the ring 28 is formed asymmetrically. The outer peripheral surface 56 has a portion 58. This is inclined in the illustrated embodiment, approximately at 45 ° to the annular center plane 64. In principle, this section 58 should be designed such that it can not catch on a profiled pin or support pin of the lock cylinder. Furthermore, the outer peripheral surface 56 has a concave portion 60. Such a concave portion 60 may, for example, be provided to allow the advance of the ring 28 in the keyway by means of the clearance provided by it. Due to the lower provided by the concave portion 60 Cross-sectional area of the ring 28 can thus avoid collisions or be provided more space for other security features of a locking device.

The Fig. 10 shows the shaft 26 and arranged thereon, identically formed rings 28 and 30. It is shown a plan view, this direction corresponds to that of Fig. 3 , The shaft 26 extends, as indicated by the arrow 66, transverse to the longitudinal direction 16 of the key and perpendicular to the median plane 36. An outer diameter of the shaft is designated by the reference numeral 54. As already described, the inner diameter 50 of the rings 28, 30 is greater than the outer diameter 54 of the shaft 26. A length of the recess parallel to the longitudinal direction 16 is designated by the reference numeral 74. A width of the recess 32 is designated by the reference numeral 76. As already mentioned, the width 76 of the recess 32 is slightly larger than a total width 72 of the rings 28, 30. By total width is meant the combined width of the rings 28, 30. In the case of the illustrated embodiment of two identically formed rings 28, 30, the total width 72 is thus two times the width 51. The length 74 of the recess 32 is slightly larger than the outer diameter 52 of the rings 28, 30. In particular, a function as a reversible key permit, the rings 28, 30 are arranged symmetrically with respect to the median plane 36. The rings 28, 30 are thus identical, but arranged in opposite orientations on the shaft 26. Thus, a situation results quasi "back to back". That is, the concave portions 60 face each other. In this way, despite the asymmetrical design of each of the rings with respect to its annular center plane 74 results in a total symmetrical arrangement with respect to the median plane 36th

The Fig. 11 again shows an isometric view of the representation of Fig. 10 , From the in the Fig. 10 shown "neutral position" in which the rings 28, 30 are not deflected, shows the Fig. 11 a deflected state in which the ring 30 is deflected in the direction 68 and the ring 28 in the opposite direction 70. As will be explained below, this design state is particularly relevant to safety for a locking device in order to spend it in the release state.

The Fig. 12 shows an exploded view of a locking device 80. The locking device 80 has the key 10, as described above in connection with the Fig. 1 to 11 has been described. The same elements are therefore identified by the same reference numerals and will not be explained again. In addition, the closing device 80 has a lock cylinder 81. In the illustrated embodiment, the lock cylinder 81 is a profile cylinder. However, it may also be another form, for example a round cylinder or oval cylinder.

The lock cylinder 81 has a housing 82 and a cylinder core 84. The cylinder core 84 is mounted in the housing 82 by means of a snap ring 86. The housing 83 is otherwise provided, for example, with a mounting hole 87 or threaded hole in order to screw the lock cylinder 81 in a door can. Furthermore, the housing 82 and also the cylinder core 84 can have a multiplicity of bores, in each of which locking devices, in particular pin tumblers, are guided in order to interrogate various security features of a key 10. Shown and explained below are only standing in connection with the rings 28 and 30 locking devices, in particular pin tumblers, which interact with the rings 28, 30.

The cylinder core 84 has a keyway 88. The key 10 is inserted into this key channel 88. After the key 10 has been fully inserted and all the security features of the key 10 have been polled positively, all of the locking fuses are moved to a position that permits rotation of the cylinder core relative to the housing 82. This is the release state. If the key 10 is not fully inserted or fully withdrawn from the keyway 88, rotation of the cylinder core 81 relative to the housing 82 is not possible. This is called a lock state.

In the lock cylinder 80, as already described above, a plurality of profile pins 90 are provided which can serve to interrogate recesses 34 in the key shank 14. However, these are not important in terms of the functionality of the rings 28, 30. With the rings 28, 30 cooperate a first support pin 92 and a second support pin 94. The support pins 92, 94 are in the cylinder core 84 pressed. They are not movable. The support pins 92, 94 direct a respective ring 28, 30 in the in the Fig. 11 indicated position and support this against a respective locking fuse or Stiftzuhaltung 104, 106 from. A first locking device or pin tumbler is designated by reference numeral 104. This cooperates with the first support pin 92. The first locking device is indicated schematically and usually has a core pin 96. A housing pin 98 is supported by a spring element 100 or support spring against a support member 102. In the locked state, protruding the housing pin 98 into the cylinder core 84 prevents rotation of the cylinder core 84. In the release state, a contact surface between the core pin 96 and the housing pin 98 is located such that the housing pin 98 does not protrude into the cylinder core 84, including the Core pin 96 does not protrude into the housing 82. In this way, the rotation of the cylinder core 84 relative to the housing 82 is made possible. In addition, only schematically indicated is the second locking device or pin tumbler 106 on the basis of a core pin 98. The remaining elements of this locking device are not shown for reasons of clarity. This second locking device 106 cooperates with the second support pin 94.

The Fig. 13 shows an isometric assembled view of the locking device 80. The key 10 is completely inserted into the cylinder core 84. The cylinder core is mounted in the housing mouth 82 by means of the snap ring 86.

The Fig. 14 shows a corresponding side view of the assembly view of Fig. 13 , The same elements are identified by the same reference numerals.

The Fig. 15 shows a cross-sectional view taken along a line XV-XV of Fig. 14 , Same elements as in the exploded view of Fig. 12 are marked with the same reference numerals and will not be explained again. In the illustrated view, the closure device 80 is in a release state. The key 10 is fully inserted in the keyway 88. In this position, the first support pin 92 deflects the ring 30 and thereby moves the core pin 96. This in turn moves the housing pin 98 against the force of the spring 100, which is supported on the support member 102. As can be seen, therefore, a contact surface between the core pin 96 and the housing pin 98 directly on a peripheral surface of the cylinder core 84, so that this can be rotated in the housing 82. A corresponding deflection results from a deflection of the ring 28 on the second support pin 94, so that the core pin 99 is deflected. As already stated, the other side of the locking device or pin tumbler 106 is merely indicated schematically. Each of the support pins 92 and 94 is arranged at an angle of approximately 45 ° to the keyway. Each of the support pins 92 and 94 has a conical tip which slides along the respective outer peripheral surface 56 of each ring 28, 30 to deflect it as the key 10 is inserted. The support pins 92 and 94 are disposed on opposite sides of the keyway 88. Accordingly, the first pin tumbler 104 and the second pin tumbler 106 are also disposed on opposite sides of the keyway 88.

The Fig. 16a shows a view of the keyway 88. The viewing direction is in the Fig. 13 shown. However, the key 10 is cut out here except for the shaft 26 and the rings 28, 30. It has already been explained that the outer circumferential surface 56 is asymmetrical with respect to a respective annular middle plane 64. As can be seen, each keyway 88 in opposing surfaces has a complementary cross-sectional profile to interrogate this asymmetric outer peripheral cross-section of each ring 28,30. It can thus be seen that the ring 28 initially at a neutral position in the Fig. 16a "up" offset in the keyway 88 is guided. The ring 30 is correspondingly "down" offset guided by the keyway 88. The respective asymmetrical outer peripheral cross sections fit into the complementary profile cross sections 109 and 110. The complementary profile cross sections 109, 110 extend as longitudinal grooves completely through the keyway 88 and guide the rings during insertion of the key 10 to a rear end of the keyway 88, in the rings 28, 30 are deflected by the support pins 92 and 94.

The Fig. 16b shows a view of the key channel 88. In the in the Fig. 16b illustrated position, the locking device 80 is in a release state. Like in the Fig. 16b can be seen, the rings are then deflected here in corresponding opposite directions away from their respective complementary profile cross sections 109, 110. In this way, a labyrinth is provided, through which the rings 28, 30 must be performed as movable elements to reach the release state. It is thus imperative that the rings 28, 30 can be moved separately or independently on the shaft 26. In this way, the safety of the illustrated locking device 80 can be significantly increased. Furthermore, a security of the key 10 against unauthorized reworking or copies is significantly increased, because the rings 28, 30 must be known and reproduced as separately movable elements.

Furthermore, further longitudinal grooves 112, 112 ', 113, 113' are shown, which cooperate with corresponding elevations 22 of the key and also serve as a security-relevant query. It can be seen that the keyway 88 is formed point-symmetrical in its cross-section to support the function of the key 10 as a helical key. The complementary profile cross sections 109, 110 are correspondingly arranged on an opposite side 115, 117 of the keyway 88.

The FIGS. 17 and 18 once again show a clear view of the involved in the release state and in cooperation with the rings 28 and 30 elements of the lock cylinder 81. Clearly recognizable is again the deflection of the rings 28 and 30 in the opposite direction. These are deflected by the about the angle 108, in particular an angle of 45 °, relative to the keyway 88 and a longitudinal extension of the shaft 26 inclined support pins 92 and 94. These deflect each one of the rings 28, 30 and support it against a respective Kernstift 96, 99 from. By inserting the key 10, each of the rings 28, 30 is thus pushed between an associated support pin and core pin. The ring 30 is slid between the support pin 92 and the core pin 96. The ring 28 is pushed between the support pin 94 and the core pin 99. Due to the fixed arrangement of the support pins 92, 94 while a respective ring 29, 30 is deflected and moves a corresponding core pin 96, 99, so that an associated locking fuse 104, 106 is moved to the release state. As already stated above, in particular the movement of the rings 28, 30 takes place in mutually opposite directions.

Claims (24)

1. Key (10) for a lock cylinder (81), wherein the key (10) comprises a key shank (14) which extends along a longitudinal direction (16) and which has two key broad side faces (18, 18'), wherein the key shank (14) has a cutout (32) through the key broad side faces (18, 18'), wherein a shaft (26) extends through the cutout (32), and wherein the shaft (26) is arranged in the key shank (14) in a rotationally fixed manner, and wherein at least two rings (28, 30) are arranged next to one another on the shaft (26) in the cutout (32), wherein an inside diameter (50) of each ring (28, 30) is larger than an outside diameter (54) of the shaft (26), characterized in that the key (10) has exactly two rings (28, 30), and in that the rings (28, 30) are each formed symmetrically to a rotational symmetry axis (62), and are formed asymmetrically relative to a ring centre plane (64) extending perpendicularly to the rotational symmetry axis (62).
2. Key (10) according to Claim 1, characterized in that the rings (28, 30) are arranged adjacently to one another on the shaft (26).
3. Key (10) according to Claim 1 or 2, characterized in that the rings (28, 30) are of identical design.
4. Key (10) according to Claim 2 or 3, characterized in that a respective outer circumferential face (56) of the rings (28, 30) is formed asymmetrically with respect to the ring centre plane (64).
5. Key (10) according to one of Claims 1 to 4, characterized in that the cutout (32) is arranged symmetrically and parallel to a centre plane (36) of the key shank (14) that extends perpendicularly to the key broad side faces (18, 18') and in the longitudinal direction (16).
6. Key (10) according to one of Claims 1 to 5, characterized in that the rings (28, 30) are arranged symmetrically to a centre plane (36) of the key shank (14) that extends perpendicularly to the key broad side faces (18, 18') and parallel to the longitudinal direction (16).
7. Key (10) according to one of Claims 2 to 6, characterized in that in each case one of the two rings (28, 30) is arranged on each side of a centre plane (36) of the key shank (14) that extends perpendicularly to the key broad side faces (18, 18') and parallel to the longitudinal direction (16).
8. Key (10) according to one of Claims 2 to 7, characterized in that the rings (28, 30) are arranged on the shaft (26) in mirror-image fashion with respect to one another.
9. Key (10) according to one of Claims 1 to 8, characterized in that the cutout (32) is dimensioned in such a way that the rings (28, 30) are guided perpendicularly to the key broad side faces (18, 18') and can be rotated on the shaft (26).
10. Key (10) according to one of Claims 1 to 9, characterized in that a width (76) of the cutout (32) is somewhat larger than a total width (72) of the rings (28, 30) which are arranged next to one another, thereby allowing a movement (68, 70) of each ring (28, 30), guided by the cutout (32) and the respective other ring (30, 28), perpendicularly to the key broad side faces (18, 18').
11. Key (10) according to one of Claims 1 to 10, characterized in that the shaft (26) is arranged parallel to the key broad side faces (18, 18') in the key shank (14).
12. Key (10) according to one of Claims 1 to 11, characterized in that the key shank (14) has at least one longitudinal groove (24) in at least one of the key broad side faces (18, 18'), said longitudinal groove extending parallel to the longitudinal direction (16).
13. Key (10) according to one of Claims 1 to 12, characterized in that the key shank (14) has, in at least one of the key broad side faces (18, 18'), at least one depression (34) to be sensed by a profiled pin (90).
14. Key (10) according to one of Claims 1 to 13, characterized in that the cutout (32) is arranged in a front third (15) of the key shank (14) that is directed away from a key head (12).
15. Key (1 according to one of Claims 1 to 14, characterized in that the key (10) is designed as a reversible key.
16. Key (10) according to one of Claims 1 to 15, characterized in that the shaft (26) extends through the entire key shank (14), and wherein the key shank (14) has two mutually opposite key narrow side faces (20, 20'), and wherein each key narrow side face has an opening (42) for pressing in the shaft (26).
17. Key (10) according to one of Claims 1 to 16, characterized in that an outside diameter (52) of each ring (28, 30) is larger than a distance (41) between the key broad side faces (18, 18').
18. Key (10) according to one of Claims 1 to 17, characterized in that the key shank (14) has at least one tip depression (38) in at least one of the key broad side faces (18, 18'), and wherein the at least one tip depression (38) adjoins the cutout (32).
19. Locking device (80) having a key (10) according to one of Claims 1 to 18 and a lock cylinder (81), wherein the lock cylinder (81) has a housing (82) and a cylinder core (84) wherein the lock cylinder (81) has a plurality of blocking means (104, 106) corresponding to the number of rings (28, 30), wherein each blocking means (104, 106) is movable between a blocking state and a release state and blocks a rotary movement of the cylinder core (84) with respect to the housing (82) in the blocking state and releases it in the release state, wherein each ring (28, 30) is assigned one of the blocking means (104, 106), and wherein the lock cylinder can be transferred from the blocking state into the release state by completely inserting the key (10) into a key channel (88) of the cylinder core, wherein the cylinder core (84) has, for each ring (28, 30), a supporting pin (92, 94) assigned to the respective blocking means (104, 106), and wherein the respective assigned blocking means (104, 106) can be moved into the release state by inserting each of the rings (28, 30) between the respective assigned supporting pin (92, 94) and the respective assigned blocking means (104, 106), wherein the key (10) has exactly a first ring (30) and a second ring (28), wherein the lock cylinder (81) has at least a first blocking means (104) assigned to the first ring (30) and a second blocking means (106) assigned to the second ring (28), wherein the cylinder core (84) has a first supporting pin (92) assigned to the first blocking means (104) and has a second supporting pin (94) assigned to the second blocking means (106), wherein the first supporting pin (92) supports the first ring (30) against the first blocking means (104) in the release state, and wherein the second supporting pin (94) supports the second ring (28) against the second blocking means (106) in the release state.
20. Locking device according to Claim 19, characterized in that the first supporting pin (92) and the second supporting pin (94) are arranged on opposite sides of the key channel (88).
21. Locking device according to Claim 19, characterized in that the first supporting pin (92) and the second supporting pin (94) are arranged on the same side of the key channel (88).
22. Locking device according to one of Claims 19 to 21, characterized in that the first supporting pin (92) and the second supporting pin (94) are arranged obliquely with respect to the key channel (88).
23. Locking device according to one of Claims 19 to 22, characterized in that the key channel (88) has a plurality of longitudinal grooves (109, 110) corresponding at least to the number of rings (28, 30), wherein each ring (28, 30) is assigned a longitudinal groove (109, 110) whose cross-sectional contour is designed to be complementary with an outer circumferential face (56) of the respective ring (28, 30).
24. Locking device according to Claims 20 and 23, characterized in that the first ring (30) is assigned a first longitudinal groove (109) and the second ring (28) is assigned a second longitudinal groove (110), and wherein the first longitudinal groove (109) and the second longitudinal groove (110) are formed in mutually opposite faces (115, 117) of the key channel (88).

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