WO2019053135A1

WO2019053135A1 - Locking device

Info

Publication number: WO2019053135A1
Application number: PCT/EP2018/074764
Authority: WO
Original assignee: Abus Pfaffenhain Gmbh
Priority date: 2017-09-13
Filing date: 2018-09-13
Publication date: 2019-03-21
Also published as: JP2020533501A; AU2018332493A1; CN111133163B; DE102017121226A1; JP7278265B2; AU2018332493B2; EP3658725A1; CN111133163A

Abstract

A locking device, in particular a lock cylinder, comprises a basic body which has a core receptacle; a cylinder core which is accommodated in the core receptacle of the basic body so as to be rotatable about an axis of rotation and which has a keyway for a key assigned to the locking device; and a plurality of tumblers which project partially into the keyway and are designed to block the cylinder core in a normal position of the cylinder core against a rotation from the normal position if they are not arranged, in particular by the assigned key, in a configuration in which they free the cylinder core. The cylinder core has a movably mounted blocking element which is prestressed radially outwards with respect to the axis of rotation and which is designed to be held in a neutral position by the assigned key counter to the prestress. On an inner lateral surface of the core receptacle there is formed a stop portion which defines a limit position of the cylinder core that is different from the normal position and up to which the cylinder core, in the freeing configuration of the tumblers, is freely rotatable starting from the normal position, and in which the blocking element, if it is not situated in the neutral position, butts against the stop portion in order to block a rotation of the cylinder core over and beyond the limit position.

Description

closing device

The present invention relates to a locking device having a base body, which has a core receptacle, with a cylinder core which is rotatably received about an axis of rotation in the core receptacle of the main body and has a key channel for a closure device associated key, and with a plurality of tumblers, partially in The keyway protrude and are designed to lock the cylinder core in a normal position of the cylinder core against rotation out of the normal position, unless they are arranged, in particular by the associated key, in a cylinder core releasing configuration. Such a closing device can in particular be designed as a lock cylinder, for instance for use in doors, wherein it may then be a cylinder housing for the cylinder core in the base body. However, the main body can also be formed, for example, by the lock body of a lock, for example a mobile lock such as a padlock. The locking device can in principle be designed in any other way, but in each case according to the same principle, a rotation of the cylinder core only by means of the correct key is possible and otherwise locked by the tumblers. The cylinder core does not necessarily have an exact cylindrical shape. Advantageously, however, it is at least substantially cylindrical, with the core receptacle provided for it in the main body having a corresponding shape, so that the cylinder core can be reliably rotated in the core receptacle. is gert. The axis of rotation of the rotatability can then correspond in particular at the same time to a cylinder axis and / or an axis of symmetry of the cylinder core or the core receptacle. The keyway advantageously extends parallel to the axis of rotation, and in particular the axis of rotation passes through the keyway, so that the associated key, when inserted into the keyway, can be rotated together with the cylinder core about its own axis.

Said normal position of the cylinder core of the closing device is a rotational position in which the cylinder core can be locked by the tumblers against rotation, namely in particular if not the associated key inserted in the keyway. In principle, there can be several such rotational positions. In particular, the cylinder core starting from said normal position after a full rotation about the axis of rotation again occupy such a rotational position, but this rotational position is not considered as a further normal position, but as the same normal position. Since one locking state of the locking device can change as a result of one or more full revolutions of the cylinder core, the normal position is therefore not set to a specific locking state. For example, the respective object on which the locking device is provided, e.g. a door to be locked in the normal position of the cylinder core by the locking device initially and unlocked after one or more complete revolutions of the cylinder core in the then resumed normal position. Thus, there is not necessarily a clear relationship between the normal position and the locking state of the locking device.

Although the cylinder core is basically rotatable relative to the main body. However, in the normal position this rotation can be prevented by the tumblers initially. The tumblers can be used, for or be designed as platelet tumblers and are expediently biased into a position in which they extend over the interface between the base body and the cylinder core such that they thereby lock the cylinder core against rotation relative to the base body.

To release this lock, the tumblers must then be placed in a cylinder core releasing configuration, i. each of the plurality of tumblers is moved to just that position in which it no longer locks the cylinder core with respect to the main body, this position being different for different tumblers. For unlocking it is therefore necessary to know the enabling configuration, i. to know which tumbler must be positioned and how. This information is coded in the key associated with the locking device insofar as the key, in particular a profile provided on a key shank of the key, optionally forces the tumblers into their respective releasing position counter to a bias when the key is correctly inserted in the keyway of the cylinder core ,

The safety of the respective closing device therefore depends, among other things, on how easily the tumblers are held in a manner other than by the key associated with the closing device - e.g. by so-called setting the tumblers by means of lock picking tools or by means of a simulated

Key - can be put into the releasing configuration. In order to prevent such irregular unlocking of the cylinder core, it is therefore advantageous to provide additional securing mechanisms which, however, should not complicate the operation of the locking device as far as possible.

It is an object of the invention, a locking device of the type mentioned, a key for such a locking device, a locking system comprising such a locking device and such a key, or to provide a key blank for making such a key which provides improved protection against irregular unlocking while allowing for easy and comfortable operation. The object is achieved by a locking device having the features of claim 1, by a key having the features of claim 14, by a locking system having the features of claim 18 and by a key blank having the features of claim 19. Advantageous embodiments of the invention result from the dependent claims, the description and the figures.

In the case of the closing device according to the invention, the cylinder core has a movably mounted locking element which is radially outwardly biased relative to the axis of rotation and which is designed to be held in a neutral position by the associated key against this pretensioning. In particular, the blocking element and the cylinder core on which it is mounted may be connected to each other for common rotation about the rotation axis, so that the blocking element can not be rotated without the blocking element without the cylinder core and the cylinder core. Thus, the cylinder core can be locked against rotation by the movement path which passes through the locking element upon rotation of the cylinder core is blocked. Since the blocking element is movably mounted on the cylinder core, the respectively traversed trajectory depends on the respective position of the blocking element, so that the rotation of the cylinder core can be blocked in dependence on the position of the blocking element.

The blocking element is biased radially outwardly, ie in a position in which it extends as far as possible within its mobility currently possible radially away from the axis of rotation away. The blocking element is preferably mounted at least substantially linearly displaceable on the cylinder core, wherein the direction of the mobility is aligned in particular at least substantially radially to the axis of rotation, ie the axis of rotation intersects. In principle, however, the blocking element can also be oriented differently from it and / or be movably mounted on the cylinder core, for example pivotally or rotatably, wherein the blocking element is then biased radially outwards insofar as it is biased in the direction of a position a point of the blocking element which is farthest from the axis of rotation is as far as possible from the axis of rotation. Contrary to this bias, the blocking element can be kept in a neutral position. In the neutral position, the blocking element thus extends radially with respect to the axis of rotation not so far outward as in positions in which the blocking element is biased contrast and therefore occupies it, if it is not held in the neutral position, ie in particular when the cylinder core is operated without a key or with a wrong key.

In the neutral position, the blocking element may in particular be arranged such that it does not protrude beyond the cylinder core in the radial direction, but in particular terminates flush with a lateral surface of the cylinder core. If it is not held in this neutral position, the blocking element is then displaced as a result of the bias in a position in which it projects beyond the cylinder core. The neutral position need not necessarily designate a single radial position of the blocking element, but may also include all those positions of the blocking element in which the blocking element radially outward no further than up to a certain edge position, for example, that position in which it flush closes with a lateral surface of the cylinder core is arranged.

The blocking element is specially designed, in particular by the associated key, to be held in this neutral position. The interaction kung between the bowl and the blocking element, by which the holding is achieved, can in principle be done in various ways, for example mechanically or preferably magnetically (as will be explained below). Preferably, the interaction is such that as far as possible or only with possible lent great effort in other ways than with the associated key holding the locking element in the neutral position against the bias can be achieved and that copying of the key with respect to this function also possible not or only with the greatest possible effort to accomplish is. In this way, additional locking against irregular rotation of the cylinder core can be realized by the blocking element in addition to the blocking of the cylinder core by the tumblers, whereby the safety of the locking device is improved. Since the same bowl can be used for arranging the tumblers in the releasing configuration as for holding the blocking element in the neutral position, advantageously no additional effort is required for a user of the closing device in spite of the additional securing in the operation of the locking device.

The additional locking of the cylinder core by said blocking element takes place in cooperation of the blocking element with a formed on an inner circumferential surface of the core receiving stop portion and depending on whether the locking element is held in the neutral position or due to the bias beyond the neutral position also radially is offset externally. The inner lateral surface of the core receptacle can be formed, in particular, by a, preferably cylinder-jacket-shaped, inner wall of the core receptacle, against which the cylinder core rests with an outer circumferential surface or slides along during rotation. The abutment portion can be formed, for example, by a step in said lateral surface at which the radius of the lateral surface changes abruptly. The lateral surface may, for example, have a depression which is limited in the circumferential direction on at least one side by such a step. By the said abutment portion while a limit position of the cylinder core is defined up to which the cylinder core is freely rotatable in the releasing configuration of the tumblers starting from the normal position and in which the blocking element, if it is not in the neutral position, but in particular on the neutral position projecting radially outwardly abuts against the abutment portion to block rotation of the cylinder core beyond the limit position. The limit position is therefore a further rotational position of the cylinder core which differs from the normal position. The limit position can be assumed starting from the normal position, for example by a rotation of the cylinder core about the rotation axis by at least about 5 °, preferably by at least about 10 °, in particular by at least about 20 °. From the normal position to the limit position, the cylinder core is freely rotatable in the releasing configuration of the tumblers. In other words, it is a prerequisite for rotation of the cylinder core from the normal position that the tumblers are arranged in the releasing configuration; but if this is the case, the cylinder core can be rotated in at least one direction of rotation to the limit position and regardless of whether the locking element is held in the neutral position or not. In the limit position, however, it depends on the position of the blocking element, whether the blocking element can be moved past the stop section and thus the cylinder core can be rotated beyond the limit position or whether the blocking element abuts against the stop section and thereby causes the cylinder core to rotate is prevented beyond the limit position. Only when the blocking element is in the neutral position despite the bias, it can be guided past the stopper portion. Otherwise, so if it extends beyond the neutral position radially outward, the blocking element abuts against the stopper portion. Thus, even if one should succeed in arranging the tumblers in the releasing configuration, the cylinder core is at least secured against turning beyond said limit position. In this case, the cylinder core is not locked by the blocking element but not in the starting position, namely the normal position, but is freely rotatable up to the limit position. This has, for example, the advantage that in this way a copied key can be recognized, which indeed has a suitable for displacing the tumblers in the releasing configuration profiling, in contrast to the original, the locking device associated key but not on the required

Features required for holding the locking element in the neutral position. Because while the cylinder core with the correct key beyond the limit position can be rotated and without or with a total wrong key can not be rotated from the normal position, by means of such a copied key turning from the normal position is possible, but only to the limit position.

According to a preferred embodiment, the blocking element is adapted to be held by the associated key by magnetic attraction in the neutral position. In particular, the blocking element or at least a part thereof may comprise a soft magnetic material that can be attracted by a provided in the key at a suitable location, in particular on a key shank of the key, permanent magnet. Due to this magnetic interaction, the blocking element can then be held in the neutral position as long as the key is inserted in the key channel. Otherwise, however, the blocking element is not held in the neutral position, so that it can not be passed in the limit position on the stopper portion. In such an embodiment, therefore, a magnetic attraction acting on the blocking element and defined with respect to the location and the direction is a prerequisite for being able to turn the cylinder core beyond the limiting position. Such magnetic attraction of the locking element can not be easily adjusted by means of lock picking tools. In addition, key blanks used to copy keys typically do not have magnetic elements to create a defined magnetic attraction. In principle, even copied keys can be provided with permanent magnets. However, this increases the cost of producing the copy considerably. Therefore, by this embodiment, the safety of the locking device according to the invention against irregular operation can be further increased.

According to a further advantageous embodiment, a holding portion is formed on the inner Mantelflä- surface of the core receptacle, which holds the locking element in the normal position of the cylinder core against the biasing force acting on the locking element in the neutral position. In such an embodiment, the blocking element is thus not only in the neutral position when the key of the locking device is inserted key is inserted into the keyway and holds the locking element, in particular by magnetic attraction, in the neutral position, but regardless of the key also then, when the cylinder core is in the normal position, in which it is then held by the said holding portion of the core holder in the neutral position.

This has the advantage that when inserting the associated key in the key channel, the blocking element is already in the neutral position and therefore not first, for example, must be moved from the key to the neutral position, then held by the inserted key in the neutral position become. Especially when the blocking element is designed to Thus, it is not necessary for a permanent magnet provided on the key to be held in the neutral position by the associated key to be held in the neutral position by magnetic attraction in such a way that it displaces the blocking element over a certain distance from a position further radially away from the axis of rotation can move closer to the neutral position. Rather, it is sufficient if the permanent magnet is just strong enough to hold the already located in the neutral position blocking element in the neutral position. Preferably, the blocking element is further arranged so that it is at least substantially immediately adjacent to the inserted in the keyway key in the neutral position, so that there provided a permanent magnet only has to have a relatively short range in order to reliably cooperate magnetically with the blocking element.

According to an advantageous development of the above embodiment, a transition section is formed on the inner circumferential surface of the core receptacle between the stopper portion and the holding portion along which increases the radius of the core receptacle with respect to the axis of rotation from the holding portion to a adjacent to the abutment portion recessed portion. If the blocking element is not held by the associated key in the neutral position, the blocking element, which is urged in the normal position by its bias against the holding portion, thus guided when turning the cylinder core from the normal position in the direction of the limit position along the transition section along become. In this case, the blocking element assumes due to the bias in each case that radial position in which it rests at the respective rotational position at a corresponding point of the transition section.

The radial height profile of the transition section in the circumferential direction defines the radial position of the locking element in dependence on the respective rotational position of the cylinder core on its way from the normal position in the Limit position or vice versa from the limit position to the normal position. In the normal position, the blocking element is held by the holding portion in the neutral position, whereas the blocking element in the limit position abuts against the abutment portion adjacent recess portion having a larger radius compared to the holding portion, so that the blocking element in the limit position of the cylinder core on the neutral position protrudes radially outward. Between the holding section and the recessed section, the radius of the core receptacle changes, ie the radial height profile of the transition section, preferably continuously, thus has no abrupt transitions, so that the blocking element along the entire course of the transition section can be passed unhindered. Preferably, the radius increases from the holding section to the recess section in a monotone, although not necessarily strictly monotone, although this increase does not necessarily have to be uniform, but, for example, a curved course is also possible.

Such a transition section can act as a kind of ramp by which the blocking element is automatically urged against its bias in its neutral position when the cylinder core is rotated from the limit position to the normal position. This has the advantage that when the cylinder core is actuated by means of a key or tool which is not suitable for holding the blocking element in the neutral position, the cylinder core can nevertheless be returned from the limit position to the normal position, although this presupposes due to the holding section. that the blocking element is in its neutral position. If, on the other hand, no such transition section, but approximately one step, was provided between a recess section adjoining the abutment section and the retaining section, the blocking element could not be moved past this step, so that the cylinder core would be caught in the limit position or an angular range of angles adjacent thereto. Since such a case does not only apply to irregular operation of the locking device, but could occur even if the magnetization of the locking device associated key subsides, it is expedient to lock such a barely re-solving blockage of the cylinder core in a deviating from the normal position rotational position in the manner described constructively.

According to a further advantageous embodiment, a further abutment portion is formed on the inner circumferential surface of the core receptacle, which is arranged in the opposite direction from the normal position of the cylinder core in comparison to said abutment portion and by which a further different from the normal position limit position of the cylinder core is defined up to which the cylinder core in the releasing configuration of the tumblers, starting from the normal position in the opposite direction of rotation is freely rotatable and in which the blocking element, if it is not in the neutral position, but in particular projects radially outward on the neutral position, at the other Stop section abuts to lock rotation of the cylinder core in the opposite direction beyond the further limit position addition. By means of such a further stop section, the functions and advantages mentioned with respect to the other stop section can be achieved not only in one direction of rotation starting from the normal position, but also in the opposite direction of rotation in a corresponding manner.

In particular, while the inner circumferential surface of the core receptacle - at least in an axial axis relative to the axis of rotation, in which the locking element is arranged - starting from a point to which the locking element in the normal position of the cylinder core, at least up to the one stop section and on the other further stop portion be formed symmetrically symmetrical direction. In this way, the operation of the closing device is the same regardless of the direction of rotation. The named point with respect to which the inner circumferential surface of the core receptacle is designed to be rotationally symmetrical, in particular, it may correspond to the midpoint of the mentioned holding section in the circumferential direction. According to a further advantageous embodiment, the closing device comprises a guide element which is inserted into a recess of the base body provided on the inner lateral surface of the core receptacle and has the stopper section. If a further stop section, a holding section and / or a transition section are also provided, the guide element preferably also has one or more of these elements. In other words, the stopper portion is formed in this embodiment, not directly in the body, but in a separate guide member, which is, however, attached to the body. By appropriate arrangement of the guide element, this can thus at least partially form itself a part of the inner circumferential surface of the core receptacle. Such an embodiment has the advantage, for example, that the guide element, which cooperates with the blocking element, can be formed from a different material than the base body, in particular a material which may be suitable especially for the function of the guide element. Furthermore, by introducing a corresponding recess and inserting the guide element into the recess, the basic body of a conventional closing device can thus be retrofitted in accordance with the invention.

In such an embodiment, it is further preferred that the said recess in a direction tangential to the axis of rotation has a continuous uniform cross section, ie that the cross section is at least substantially constant in the said tangential direction. In particular, the recess may extend tangentially to the axis of rotation from outside the main body into the main body, so that the guide element, which advantageously has a corresponding cross section, can long this extension can be used in the recess. The recess then extends from an outside of the main body at least to the inner lateral surface of the core receptacle or along it, so that the inserted guide element can interact with the blocking element of the cylinder core inserted into the core receptacle. Preferably, the recess extends completely through the base body, so that the guide element can be selectively inserted into the recess at one of two opposite ends of the recess from outside the base body. The provision of a tangential recess with consistently uniform cross-section has not only advantages in assembling the locking device, but also in the manufacture of the body, since the recess can be introduced in this way by a broaching operation from outside the body in the body. In principle, however, another alternative embodiment of the recess comes into consideration as an alternative. For example, the recess can also be introduced from inside the core receptacle, for example as pocket milling, into the base body.

According to a further advantageous embodiment, the blocking element has a pin shape which extends along a pin axis which is radially aligned with respect to the axis of rotation, wherein the pin shape can be designed in particular symmetrically with respect to the pin axis. Advantageously, the pin axis is aligned radially to the axis of rotation and thus intersects the axis of rotation. Furthermore, it is preferred that the blocking element is mounted linearly along its pin axis movable on the cylinder core.

According to an advantageous development of this embodiment, the blocking element has a diameter enlargement set back relative to an end face, in particular with respect to two end faces opposite the pin axis. The respective end face is in particular perpendicular to said Aligned pin axis. The increase in diameter preferably has a diameter which is stepped in relation to an adjacent section of the blocking element, thereby creating a shoulder, in particular a peripheral one. On the side of the diameter enlargement pointing towards the axis of rotation, such a shoulder can serve as a point of application for a pretensioning device, for example a helical spring, which pretensions the blocking element radially outward from the neutral position. On the side of the increase in diameter facing away from the axis of rotation, such a shoulder can cooperate with the abutment portion so that the shoulder with a concave edge meets a convex edge of the abutment portion when the cylinder core is turned to the limit position and the locking element is not in the neutral position is held. As a result, a particularly stable interaction of the blocking element with the stop section can be achieved. According to a further advantageous embodiment, the blocking element and the tumblers are arranged such that they are angled, in particular perpendicular, mutually movable. The directions of movement of the tumblers on the one hand and of the blocking element on the other hand preferably have an angle of at least about 30 °, preferably of at least about 45 °, more preferably about 90 °. Such an angled, in particular vertical, arrangement complicates the locking of the locking device by means of lock picking tools, since the blocking element and the tumblers must be actuated in different directions. According to a further advantageous embodiment, the keyway substantially in the form of a flat parallelepiped with two mutually opposite and parallel to the axis of rotation broad sides and two mutually opposite and parallel to the axis of rotation narrow sides, wherein the blocking element is movable perpendicular to the narrow sides. It is understood that while the narrow sides have a smaller width than the broadsides. at Such an arrangement of the blocking element, this can cooperate in particular with a corresponding narrow side of a corresponding cuboid key shaft of the associated key. It is further preferred that the blocking element in the neutral position adjacent to one of the narrow sides of the keyway. For example, the blocking element in the neutral position with an end face, in particular one of the aforementioned end faces, substantially flush with the narrow side. Generally, it is advantageous if the blocking element in the neutral position, as directly as possible, adjacent to the key channel and thus can adjoin a key inserted into the key channel, thereby forming a locking element in the neutral position holding the associated key with the locking element is simplified. In particular, the blocking element over such a short distance in a reliable manner by the key by magnetic attraction in the neutral position can be maintained without the need for a particularly strong permanent magnet should be provided on the key. A reduction of the magnetization can also be less problematic at short distances. The key according to the invention is designed for use with a locking device according to the invention, in particular a locking device according to one of the embodiments described above, and further, when it is inserted into the keyway of the cylinder core of the locking device, on the one hand the tumblers in a cylinder core for a rotation to arrange the normal position releasing configuration and on the other hand to hold the blocking element against its bias in its neutral position.

According to an advantageous embodiment, the key has a key shaft extending along a key insertion direction, which has a Permanent magnet has to hold the locking element of the cylinder core of the closing device by magnetic attraction in the neutral position. The key may in particular have two diametrically opposed permanent magnets, so that the key can be inserted as a reversible key in two by 180 ° about the rotation axis different Drehausrichtungen in the keyway and can cooperate with the locking element of the cylinder core. In particular, if the locking device has a plurality of locking elements, the key may also have permanent magnets at different locations along the key insertion direction, whereby preferably two are respectively arranged at the corresponding location but diametrically opposite.

According to an advantageous development of this embodiment, the key shank substantially has the shape of a flat cuboid with two mutually opposite and parallel to Schlüsseleinsteckrichtung broadsides and two mutually opposite and parallel to Schlüsseleinsteckrichtung narrow sides, wherein the permanent magnet is disposed on one of the narrow sides. In the case of two or more permanent magnets, these are preferably arranged in pairs on one side and on the other narrow side.

According to a further advantageous embodiment, the key has a key shaft extending along a key insertion direction, which essentially has the shape of a flat cuboid with two broad sides parallel to each other and parallel to the key insertion direction and two narrow sides parallel to each other and to the key insertion direction, wherein the key shaft at least one of its broad sides has a cooperating with the tumblers profile through which the tumblers are arranged in the releasing configuration. For example, as the profile cooperating with the tumblers, the key shaft can Have notches, wells or shafts whose different depths of the releasing configuration of the tumblers correspond so that they put the leads in this configuration and then hold in it when the key is inserted into the key channel of the cylinder core.

The locking system according to the invention comprises a locking device according to the invention, in particular a locking device according to one of the embodiments described above, and a key according to the invention, in particular a key according to one of the embodiments described above, wherein the key is associated with the locking device, so that the locking device by means of the key can be operated regularly.

The key blank according to the invention is for producing a key according to the invention, in particular a key according to one of the embodiments described above, formed and has a key shank, which has the shape of a flat parallelepiped with two mutually opposite and parallel to Schlüsseleinsteckrichtung broadsides and two mutually opposite and Key insertion has parallel narrow sides and is preferably adapted to be provided by mechanical processing with a profile for cooperation with the tumblers of a locking device according to the invention, wherein in at least one of the narrow sides, a permanent magnet is inserted.

The invention will be further explained by way of example only with reference to the figures.

1 a and 1 b each show a perspective sectional view of an embodiment of the locking system according to the invention, which has a locking device according to the invention and an inventive key according to the invention, in two different rotational positions of the cylinder core. shows an embodiment of the key according to the invention in a perspective view. shows a part of the embodiment of the locking system according to the invention shown in Fig. 1 in a perspective sectional view. each show a part of a further embodiment of the closing device according to the invention in a perspective sectional view. Fig. 5 shows the main body of the embodiment shown in Fig. 4a and 4b in a view from above.

Fig. 6 shows a guide element of those shown in Fig. 4a and 4b

Embodiment in perspective view.

The embodiment of the closing device 11 according to the invention which is at least partially illustrated in FIGS. 1 a, 1 b, 2 and 3 is designed as a lock cylinder, namely as a profile cylinder. The cylinder housing of this lock cylinder forms a base body 13 of the closing device 11 which comprises a substantially hollow-cylindrical section and a web section extending radially with respect to the cylinder axis thereof (downward in FIGS. 1 a and 1 b).

The interior of the hollow cylindrical section forms a core receptacle 15 into which a substantially cylindrical cylinder core 17 is accommodated. there is the cylinder core 17 with an outer circumferential surface flush with an inner circumferential surface of the core receptacle 15 and is about his own cylinder axis, which coincides with the cylinder axis of the hollow cylindrical portion of the base body 13 and the cylinder axis of the core receptacle 15, in the core Aufnah 15 rotatable , The aforementioned cylinder axes therefore form a rotation axis R of the rotatability of the cylinder core 17.

In the cylinder core 17, a keyway 19 is formed, which is substantially the shape of a flat cuboid with two mutually opposite and parallel to the rotation axis R broad sides (in Fig. 1 a and 1 b facing up or down) and two mutually opposite and Rotation axis R parallel narrow sides (in Fig. 1 a and 1 b pointing to the left or right). The keyway 19 is arranged eccentrically with respect to the axis of rotation R insofar as one of the narrow sides is further away from the axis of rotation R than the other, whereas the two broad sides are preferably equidistant from the axis of rotation R. In particular, one of the narrow sides, as in the embodiment shown, adjoin the outer lateral surface of the cylinder core 17. The locking device 1 1 comprises a plurality of tumblers 21, of which in the

Sectional view of Fig. 1 a and 1 b only one can be seen. The tumbler 21, which is partially accommodated in the cylinder core 17 and partially in the web section of the base body 13 and is movable radially to the axis of rotation R, comprises a core pin 23 and a housing pin 25. In the illustrated position of the tumbler 21 is the core pin 23 completely in the cylinder core 17 and the housing pin 25 completely in the base body 13, so that the interface between the core pin 23 and the housing pin 25 coincides with the interface between the outer circumferential surface of the cylinder core 17 and the inner circumferential surface of the core receptacle 15 and the cylinder core 17th therefore not caused by the tumbler 21 to rotate out of the nor shown in Fig. 1 a. malstellung of the cylinder core 17 is prevented, as well as the comparison with Fig. 1 b shows, in which the cylinder core 17 is rotated relative to the normal position in a limit position. In this respect, the position of the tumbler 21 shown in FIG. 1a represents a position releasing the cylinder core 17 for rotation. The releasing position of a tumbler 21 depends on the length of the core pin 23, which may be different for different tumblers 21. Are all tumblers 21 of the locking device 1 1 in their respective releasing position, the releasing configuration of the tumblers 21 is present. Only if this is the case, the cylinder core 17 can be rotated from the normal position in which he is otherwise locked against rotation.

In the releasing configuration, the tumblers 21 can be displaced by a key 27 assigned to the closing device 11, which is shown separately in FIG. 2 and has a substantially parallelepiped-shaped key shank 29 extending along a key insertion direction. The key shank has a profile 30 at the broad sides of the cuboid shape parallel to the key insertion direction, which pushes the tumblers 21 into their respective releasing position against a respective tumbler spring 31 when the key 27 is completely inserted into the keyway 19 (cf. 1 a). In this way, when the key 27 is inserted, the cylinder core is rotated from the normal position shown in FIG. 1 a to the position shown in FIG. 1 b

Limit position possible.

On the cylinder core 17, a pin-shaped blocking element 33 is movably mounted, whose pin axis is aligned radially with respect to the axis of rotation R and which is displaceable along the pin axis radially to the axis of rotation R. By means of a coil spring formed as biasing device 35, the blocking element 33 is biased radially outward. As in particular in the enlarged 3, the blocking element has a diameter enlargement 37, which is set back relative to the radially opposite end faces of the blocking element 33, so that two shoulders 39, 39 'are formed. At the radially inner shoulder 39, the biasing device 35 engages.

The blocking element 33 is surrounded by a sleeve 41, which is at least substantially hollow cylindrical and like the blocking element 33 is aligned radially to the axis of rotation R. The sleeve 41 has at its radially inner end an inner diameter reduction 43, by which a further shoulder 45 is formed (see Fig. 3), on which the biasing device 35 is supported to bias the locking element 33 radially outward. The blocking element 33 is inserted together with the sleeve 41 in a bore 47 in the cylinder core 17 which extends radially from the outer circumferential surface of the cylinder core 17 to a narrow side of the key channel 19. Due to the sleeve 41, on which the shoulder 45 is formed for the biasing device 35, the bore 47 need not have a shoulder for supporting the biasing device 35 so that they have a constant, in particular circular, cross-section and thus manufacturing technology particularly simple in the cylinder core 17th can be provided. At two to the Schlüsseleinsteckrichtung parallel and mutually opposite narrow sides of the key shank 29 each have a permanent magnet 49 is provided, which is inserted into a magnetic receptacle in the respective narrow side, so that the permanent magnet is flush with the narrow side. The permanent magnet 49 and the magnetic receptacle are each shaped correspondingly and preferably, as indicated in FIG. 2 for one of the two permanent magnets 49, have a semicircular shape which, as illustrated, may be formed as a flat half-cylinder.

Along the Schlüsseleinsteckrichtung the permanent magnets 49 are arranged such that, when the key 27 with its key shank 29 in the Key channel 19 is inserted (see Fig. 1 a, 1 b and 3), with respect to the axis of rotation R are arranged axially at the level of the locking element 33. In this way, one of the two permanent magnets 49 - depending on which of the two possible Drehausrichtungen the bowl 27 was inserted into the keyway 19 - cooperate with the blocking element 33 insofar as it magnetically attracts the blocking element 33 and thereby against its bias in holding the shown in Figs. 1 a and 3 neutral position of the locking element.

If, on the other hand, no or a wrong key is inserted into the keyway 19, which in particular does not have a permanent magnet 49 at the required location, the blocking element 33 can be displaced radially outwardly into a position due to its biasing relative to the neutral position, in which it passes over the outer circumferential surface of the cylinder core 17 protrudes. In this position, the blocking element 33 abuts in the circumferential direction against a stop section 51 formed on the inner circumferential surface of the core receptacle 15 when the cylinder core 17 is rotated out of the normal position (compare FIG. 1 b). In this respect, the stopper section 51 defines the limit position of the cylinder core 17 shown in FIG. 1 b, beyond which the cylinder core 17 can not be rotated starting from the normal position in a first direction of rotation (clockwise in the example shown), as long as the blocking element 33 is not is held in its neutral position and thereby can be guided past the stopper portion 51.

When the blocking element 33 abuts against the abutment portion 51, the radially outer shoulder 37, 39 'formed by the increase in diameter 37 lies straight against the inner circumferential surface of the core receptacle 15. As a result, the blocking element 33 is supported particularly reliably on the abutment portion 51, so that the blocking of the cylinder core 17 beyond the limit position can not be overcome. On the inner circumferential surface of the Kernaufnahnne 15 is another stop portion 51 'is formed, which defines in a similar manner as said stopper portion 51 a further limit position of the cylinder core 17, beyond which the cylinder core, starting from the Nornnalstellung in a second, the first rotational direction opposite Direction of rotation (in the example shown in the counterclockwise direction) can not be rotated as long as the locking element 33 is not held in its neutral position and thereby can be passed to the stop portion 51 '. The stopper portions 51, 51 'are at least substantially symmetrical to each other.

The provided on the key shank 29 of the associated key 27 permanent magnets 49 may be sufficiently strong to pull the locking element 33 from a relative to the neutral position radially outwardly offset position in the neutral position. However, this is advantageously not necessary because the blocking element in the normal position shown in Fig. 1 a of the cylinder core 17, in which the key 27 can be inserted into the key shank 29, anyway by a formed on the inner circumferential surface of the core holder 15 holding portion 53 in the neutral position is held. The two abutment portions 51, 51 'are arranged equidistant from the holding portion 53 in the circumferential direction, so that the two limit positions relative to the normal position of the cylinder core 17 have the same angle of rotation, albeit in the opposite direction of rotation.

Between the abutment portion 51 and the holding portion 53, as well as between the further abutment portion 51 'and the holding portion 53 each have a transition portion 55, 55' along which the radius of the core receptacle 15 with respect to the axis of rotation R starting from the holding portion 53 to a the respective stop portion 55, 55 'adjacent respective recess portion 57, 57' increases. This creates a continuous, albeit not necessarily uniform, as in the example shown, but, for example, curved, transition between the radius of the holding portion 53 and the contrast enlarged radius of the respective recess portion 57, 57 '. The transition section 55, 55 'acts insofar as a ramp on which the blocking element 33 slides along with its radially outer end side due to the bias, so that the locking element 33 is forced back into its neutral position upon rotation of the cylinder core 17 from one of the two limit positions into the normal position. In particular, a rotation of the cylinder core 17 is thus not blocked from a limit position to the normal position, as would be the case if between the respective recess portion 57, 57 'and the holding portion 53, a step would be formed.

The holding section 53, the transition sections 55, 55 ', the recessed sections 57, 57' and the abutment sections 51, 51 'are each not formed directly in the main body 13, but in a separate guide element 59, which is in one on the inner Cloak surface of the core receptacle 15 provided recess 61 of the base body 13 is inserted. In the embodiment shown in FIGS. 1 a and 1 b, the recess 61 has been introduced into the main body 13 as pocket milling. FIGS. 4a, 4b, 5 and 6 show an alternative embodiment in which the recess 61 'has been introduced into the main body 13 by a broaching operation from outside the main body 13.

As can be seen in particular in Fig. 5, the recess 61 'in this embodiment has a continuous uniform cross-section, because the recess 61' can be thought of as a geometric body with respect to a longitudinal axis constant cross-section, with the axis of rotation R tangential arrangement the longitudinal axis of the main body 13 is subtracted. In this way, the guide element 59 ', which advantageously has a corresponding cross section (cf., FIG. 6), can simply be pushed into the recess 61' from outside the main body 13, instead of from the core seat 15. The recess 61 'may, for example, have the cross-section shown in FIG. 5, which has at least substantially the shape of an isosceles trapezium. In this case, a rectangle connects to the shorter base side of the trapezoid, so that the recess 61 'is open to the outside of the main body 13 throughout. In principle, however, the recess 61 'can also be closed like a channel, so that it is open to the outside of the main body 13 only at two ends or only at one end of its longitudinal extent. In contrast to the core receptacle 15, the recess 61 'is in any case open in such a way that the guide element 59' can be placed in the recess 61 'such that at least the stop section 51 and possibly also the further stop section 51', the holding section 53, the transition sections 55 , 55 'and / or the recessed portions 57, 57' are arranged on the inner circumferential surface of the core receptacle 15 in order to be able to interact with the blocking element 33 of the cylinder core 17.

reference numeral

1 1 Closure

13 basic body

15 core recording

17 cylinder core

19 key channel

21 tumbler

23 core pin

25 housing pin

27 keys

29 key shaft

30 profile

31 tumbler spring

33 blocking element

35 biasing device

37 Diameter enlargement

39, 39 'shoulder

41 sleeve

43 Inner diameter reduction

45 shoulder

47 bore

49 permanent magnet

51, 51 'stop section

53 holding section

55, 55 'transition section

57, 57 'deepening section

59, 59 'guide element

61, 61 'recess

R rotation axis

Claims

claims

Locking device (1 1), in particular lock cylinder, with a base body (13) having a core receptacle (15), with a cylinder core (17) rotatable about a rotation axis (R) in the core receptacle (15) of the base body (13) is received and a key channel (19) for one of the closing device (1 1) associated key (27), and with a plurality of tumblers (21) which protrude partially into the keyway (19) and are adapted to the cylinder core (17) in a normal position of the cylinder core (17) to lock against rotation from the normal position, unless they are arranged, in particular by the associated key (27) in a cylinder core (17) releasing configuration,

wherein the cylinder core (17) has a movably mounted and with respect to the rotation axis (R) radially outwardly biased locking element (33) which is adapted to be held by the associated key (27) against the bias in a neutral position, wherein an inner circumferential surface of the core receptacle (15) is formed a stop portion (51) by which a limit of the normal position of the cylinder core (17) is defined, up to which the cylinder core (17) in the releasing configuration of the tumblers (21) starting is freely rotatable from the normal position and in which the blocking element (33), if it is not in the neutral position, abuts against the abutment portion (51) to block rotation of the cylinder core (17) beyond the limit position.

2. Locking device according to claim 1,

wherein the blocking element (33) is adapted to be held by the associated key (27) by magnetic attraction in the neutral position.

Locking device according to claim 1 or 2,

wherein on the inner circumferential surface of the core receptacle (15) has a holding portion (53) is formed, which holds the locking element (33) in the normal position of the cylinder core (17) against the bias in the neutral position.

Locking device according to claim 3,

wherein on the inner circumferential surface of the core receptacle (15) between the abutment portion (51) and the holding portion (53) a transition portion (55) is formed, along which the radius of the core receptacle (15) with respect to the rotation axis (R) starting from the holding portion ( 53) is enlarged up to a recess portion (57) adjoining the abutment portion (51).

Locking device according to at least one of the preceding claims, wherein on the inner lateral surface of the core receptacle (15), a further stop portion (51 ') is formed, in comparison to said stopper portion (51) starting from the normal position of the cylinder core (17) in the opposite direction of rotation is arranged and by which a further different from the normal position limit position of the cylinder core (17) is defined, to which the cylinder core (17) in the releasing configuration of the tumblers (21) starting from the normal position in the opposite direction of rotation is freely rotatable and in which the blocking element (33), if it is not in the neutral position takes place at the further abutment portion (51 ') abuts to lock rotation of the cylinder core (17) in the opposite direction beyond the further limit position addition.

Locking device according to claim 5,

wherein the inner circumferential surface of the core receptacle (15) at least in an axis relative to the axis of rotation (R) axial portion in which the locking element (33) is arranged, starting from a point to which the locking element (33) in the normal position of the cylinder core (17 ), at least up to the one hand, the stopper portion (51) and on the other hand, the further stopper portion (51 ') formed in the direction of rotation symmetrical.

Locking device according to at least one of the preceding claims, wherein the closing device comprises a guide element (59) which is inserted into a recess (61) of the base body (13) provided on the inner circumferential surface of the core receptacle (15) and has the abutment portion (51).

Locking device according to claim 7,

wherein the recess (61) has a continuous uniform cross-section in a direction tangential to the axis of rotation (R).

Locking device according to at least one of the preceding claims, wherein the blocking element (33) has a pin shape which extends along a pin axis radially aligned with respect to the rotation axis (R).

Locking device according to claim 9,

wherein the locking element (33) has a relative to an end face, in particular with respect to two opposite with respect to the pin axis end faces, recessed diameter increase (37).

Locking device according to at least one of the preceding claims, wherein the blocking element (33) and the tumblers (21) are arranged such that they are angled, in particular perpendicular, to each other.

Locking device according to at least one of the preceding claims, wherein the keyway (19) has substantially the shape of a flat cuboid with two opposite to each other and to the rotation axis (R) broad sides and two mutually opposite and to the rotation axis (R) parallel narrow sides,

and wherein the blocking element (33) is movable perpendicular to the narrow sides.

Locking device according to claim 12,

wherein the blocking element (33) in the neutral position adjacent to one of the narrow sides of the key channel (19).

A key (27) for use with a locking device according to at least one of the preceding claims,

wherein the key (27) is adapted, when it is inserted into the keyway (19) of the cylinder core (17) of the locking device (1 1), the tumblers (21) in a cylinder core (17) for a rotation from the normal position to arrange releasing configuration and to hold the locking element (33) against its bias in its neutral position.

15. key according to claim 14,

wherein the key (27) has a key shaft (29) extending along a key insertion direction, which has a permanent magnet (49), in particular two diametrically opposed permanent magnets (49), in order to keep the blocking element (33) of the cylinder core (17) of the closing device (1 1) by magnetic attraction in the neutral position.

16. Key according to claim 15,

wherein the key shank (29) substantially in the form of a flat parallelepiped with two mutually opposite and parallel to Schlüsseleinsteckrichtung broadsides and two mutually opposite and parallel to Schlüsseleinsteckrichtung narrow sides, and wherein the permanent magnet (49) is arranged on one of the narrow sides.

17. A key according to at least one of claims 14 to 16,

wherein the key (27) has a key shaft (29) extending along a key insertion direction, which essentially has the shape of a flat cuboid with two broad sides parallel to each other and parallel to the key insertion direction and two narrow sides opposite to each other and parallel to the key insertion direction,

and wherein the key shank (29) has on at least one of its broad sides a profile (30) cooperating with the tumblers (21) through which the tumblers (21) are placed in the releasing configuration.

18. Locking system comprising a locking device (1 1) according to at least one of claims 1 to 13 and a key (27) according to one of claims 14 to 17.

19. key blank for producing a key (27) according to at least one of claims 14 to 17,

with a key shank (29), which essentially has the shape of a flat cuboid with two broad sides which are opposite each other and parallel to the key insertion direction, and two narrow sides which are opposite to one another and parallel to the key insertion direction and which are designed to be machined by a profile (30). for cooperation with the tumblers (21) of a closing device (1 1) to be provided according to at least one of claims 1 to 13, wherein in at least one of the narrow sides, a permanent magnet (49) is inserted.