JP7278265B2 - locking device - Google Patents

Description

The present invention comprises a base body having a core housing, a cylinder core rotatably housed in the core housing of the base body about a rotation axis and having a keyway for a key associated with a locking device, a key Projects partially into the groove to block the cylinder core in its normal position against rotation out of its normal position, especially if not arranged in a configuration to release the cylinder core by an associated key. A locking device comprising a plurality of tumblers.

Such a locking device can be configured in particular as a locking cylinder, for example for use on doors, in which case the base body can be the cylinder housing for the cylinder core. However, the base body can also be formed by the lock body of a portable lock, for example a padlock. In general, the locking device can also be constructed in different ways, but in each case the rotation of the cylinder core is only possible according to the same principle with the correct key, otherwise it is blocked by the tumbler. .

The cylinder core does not necessarily have to have an exact cylindrical shape. Advantageously, however, the core receptacle provided therefor in the base body, which is at least substantially cylindrical, has a corresponding shape, so that the cylinder core is reliably rotatable in the core receptacle. supported by In that case, the rotatable axis of rotation can, in particular, simultaneously correspond to the cylinder axis and/or the symmetry axis of the cylinder core or core receiving part. Advantageously, the keyway extends parallel to the axis of rotation, in particular the axis of rotation extends through the keyway, so that the associated key, when inserted into the keyway, has its own It can rotate together with the cylinder core around the axis.

The normal position of the cylinder core of the locking device is the rotational position in which the cylinder core can be blocked against rotation by the tumbler, ie especially when the associated key is in the keyway. Generally, there may be multiple such rotational positions. Although the cylinder core may in particular start from a normal position and after a complete rotation about its axis of rotation adopt such a rotational position again, this rotational position is not regarded as a further normal position and the same Regarded as the normal position. The locking state of the locking device can be changed by one or more complete revolutions of the cylinder core, so that the normal position is not fixed to a particular locking state. Each article provided with a locking device, e.g. a door, is first locked by the locking device, e.g. Unlocked in position. Therefore, there is not necessarily an ambiguity between the normal position and the locked state of the locking device.

The cylinder core is obviously generally rotatable with respect to the base body. However, this rotatability can first be blocked by the tumbler in the normal position. The tumbler, which can be configured, for example, as a pin tumbler or a disk tumbler, is expediently preloaded at a location extending beyond the interface between the base body and the cylinder core, thereby compressing the cylinder core. Block against rotation relative to the base body.

To unlock this block, the tumblers must be placed in a configuration that releases the cylinder core, i.e. each of the plurality of tumblers must be moved precisely to a position that does not block the cylinder core relative to the base body. and this position may vary from tumbler to tumbler. Therefore, in order to unblock, we need to know the release configuration, i.e. which tumblers need to be arranged and how. This information indicates that when the key is properly inserted into the keyway of the cylinder core, the profile provided on the key, and in particular on the key shank of the key, will cause the tumbler to move into its respective release position and optionally resist the preload. and to the extent that it is energized, it is encoded into the key associated with the locking device.

Therefore, the security of each locking device depends, inter alia, on the tumbler being set in a manner different from the key associated with the locking device, e.g. It depends on how easily it can be moved to the release configuration. Therefore, to prevent such unauthorized unblocking of the cylinder core, it would be advantageous, if possible, to provide an additional safety mechanism that would not make the operation of the locking device more complicated.

The object of the invention is to provide a locking device of the first named type, a key for such a locking device, a locking system comprising such a locking device and such a key, or a key blank for manufacturing such a key. Yes, it all offers improved protection against unauthorized unblocking and in doing so allows easy and comfortable operation.

This object is achieved by a locking device with the features of claim 1, by a key with the features of claim 14, by a locking system with the features of claim 19 and with the features of claim 19. is filled by a key blank with Advantageous embodiments of the invention result from the dependent claims, from the description and from the drawing.

In the locking device according to the invention, the cylinder core is movably supported and preloaded radially outwardly with respect to the axis of rotation and held in a neutral position against this preload by the associated key. has a blocking element configured to The blocking element and the cylinder core on which it is supported are in particular about the axis of rotation such that the blocking element cannot rotate without the cylinder core and the cylinder core cannot rotate without the blocking element. They can be connected together for common rotation. Thus, the cylinder core can be blocked against rotation since the travel path through the blocking element is blocked when the cylinder core rotates. Since the blocking elements are movably supported on the cylinder core, their respective paths of movement through are dependent on the respective positions of the blocking elements, and therefore rotation of the cylinder core is blocked according to the positions of the blocking elements. obtain.

The blocking elements are preloaded radially outwards, ie they are now in a position where they extend as far as possible within their mobility radially away from the axis of rotation. Here, the blocking element is preferably at least substantially linearly displaceably supported in the cylinder core, in particular the direction of movement is at least substantially radially aligned with respect to the axis of rotation, i.e. the axis of rotation intersect with However, the blocking elements may generally be aligned differently and/or may be movably supported in different ways, e.g. pivotable or rotatable, in the cylinder core, in which case the blocking The elements are preloaded radially outwardly to the extent that the point of the blocking element furthest radially from the axis of rotation is preloaded in the direction of the location furthest possible from the axis of rotation. has been added.

The blocking element can be held in a neutral position against this preload. Therefore, in the neutral position, the blocking element is preloaded against it and thus the blocking element is not held in the neutral position, i.e. in particular if the cylinder core is keyless or incorrect. It does not extend radially outwardly as far with respect to the axis of rotation as it does when actuated by a large key.

The blocking element can in particular be arranged in a neutral position so that it does not project radially beyond the cylinder core, but rather ends flush with the jacket surface of the cylinder core. If the blocking element is not held in this neutral position, it will be moved to a position where it protrudes beyond the cylinder as a result of the preload. A neutral position here does not necessarily specify a single radial position of the blocking element, but rather up to a certain limit position, for example, until the blocking element ends flush with the jacket surface of the cylinder core. It can also include all positions of the blocking element that are not positioned further radially outward than the .

The blocking element is specifically configured to be held in this neutral position by the associated key. Retention achieved by interaction between the key and the blocking element can generally be done in different ways, for example mechanically or preferably magnetically (as further explained below). Holding the blocking element in a neutral position against the preload in a manner different from the associated key is also, if possible, not achievable or by exerting the greatest possible effort. and likewise the duplication of keys, where possible, either cannot be done, or can only be done with the greatest possible effort for this function, is preferred. . Additional security against incorrect rotation of the cylinder core can thus be implemented by a blocking element in addition to blocking the cylinder core with the tumbler, thereby increasing the security of the locking device. Advantageously, the same key can be used to place the tumbler in the open configuration and to hold the blocking element in the neutral position, thus providing additional security, albeit locking when the locking device is actuated. No additional effort is required for the user of the device.

Additional blocking of the cylinder core by the blocking element takes place in the interaction of the blocking element with an abutment formed on the inner jacket surface of the core housing, in practice the blocking element is held in a neutral position. or is moved radially outward beyond the neutral position as a result of the preload. The inner jacket surface of the core housing can in particular be formed by the inner wall of the core housing, preferably in the form of a cylinder jacket, along which the outer jacket surface of the cylinder core contacts or slides during rotation. move. The contact portion can be formed, for example, by a step on the jacket surface where the radius of the jacket surface changes abruptly. The jacket surface can, for example, have recesses bordering such steps on at least one side in the circumferential direction.

wherein the limit position of the cylinder core is defined by the abutment, up to which limit position the cylinder core is freely rotatable starting from the normal position in the open configuration of the tumbler, at which limit position: When the blocking element is not in the neutral position, but rather projects radially outward beyond the neutral position, it abuts against the abutment and blocks rotation of the cylinder core beyond the limit position. A limit position is therefore a further rotational position of the cylinder core that differs from the normal position. The limit position can be adopted, for example, by rotation of the cylinder core about the axis of rotation by at least about 5°, preferably at least about 10°, in particular at least about 20°, starting from the normal position.

The cylinder core is freely rotatable from the normal position to the limit position in the open configuration of the tumbler. In other words, it is clear that it is a requirement for the cylinder core to rotate out of its normal position for the tumbler to be placed in the open configuration, but in this case, the cylinder core will extend to the limit position and to the limit position. It can rotate in at least one direction of rotation into position, and in fact can rotate whether or not the blocking element is held in a neutral position. However, whether the blocking element passes the abutment and thus allows the cylinder core to rotate beyond the limit position, or the blocking element abuts the abutment, thereby causing the cylinder core to move beyond the limit position. Rotation prevention depends on the position of the blocking element in the limit position. The abutment can only be passed if the blocking element is in the neutral position despite the preload. Otherwise, i.e. extending radially outward beyond the neutral position, the blocking element abuts the abutment.

Therefore, if someone attempts to place the tumbler in the open configuration, the cylinder core is also at least secured against rotation beyond the limit position. In this respect, however, the cylinder core is not blocked by the blocking element in the starting or normal position, but rather is freely rotatable to the limit position. This is because, for example, a duplicate key apparently having a profile suitable for moving the tumbler to the open configuration can be recognized in this way, but unlike the original key associated with the locking device, the blocking element is neutral. It has the advantage of not having the required features needed to hold it in place. With the correct key the cylinder core can be rotated beyond the limit position, without the key or with the wrong key at all it is not possible to rotate it out of the normal position, but out of the normal position. Rotation is clearly possible with such duplicate keys, albeit up to the limit positions.

According to a preferred embodiment, the blocking element is arranged to be held in a neutral position by magnetic force by an associated key. The blocking element, or at least part of it, may especially comprise a soft magnetic material that can be attracted by a permanent magnet provided at a suitable point on the key, in particular on the key shank of the key. This magnetic interaction can then hold the blocking element in a neutral position as long as the key is inserted in the keyway. However, otherwise the blocking element is not held in the neutral position and therefore cannot pass the abutment in the limit position.

Therefore, in such an embodiment the magnetic force acting on the blocking element and defined with respect to position and direction is a requirement to be able to rotate the cylinder core beyond the limit position. Such magnetic forces of blocking elements cannot be easily simulated using lock picking tools. Also, in principle, the key blanks used for duplicating keys do not have magnetic elements for generating a defined magnetic force. In general, duplicate keys can obviously also be provided with permanent magnets. However, the effort for the production of duplicates is thereby greatly increased. This embodiment therefore makes it possible to further increase the security of the locking device according to the invention against unauthorized actuation.

According to a further advantageous embodiment, a holding portion is formed on the inner jacket surface of the core receptacle which, in the normal position of the cylinder core, holds the locking element in a neutral position against a preload acting on the locking element. there is Thus, in such an embodiment the locking device is not only in a neutral position, but rather in any Also, when the cylinder core is in the normal position and the blocking element is held in the neutral position by the retainer of the core housing, it is in the neutral position independently of the key.

This is because, upon insertion of the associated key into the keyway, the blocking element is already in a neutral position and is therefore, for example, first moved into the neutral position by the key and then held in the neutral position by the inserted key. It has the advantage that it does not need to be In particular, if the blocking element is configured to be held in a neutral position by magnetic forces by the associated key, the permanent magnets provided on the key for this purpose move the blocking element radially from the axis of rotation. It need not be so powerful that it can be attracted from further away to closer to itself over a particular distance. It is sufficient if the permanent magnet is strong enough to hold the blocking element already in neutral position in neutral position. The blocking element is preferably arranged at least substantially directly adjacent to the key inserted in the keyway, thus ensuring that the permanent magnets provided therein magnetically interact with the blocking element. It is only necessary to have a relatively short distance so that

According to an advantageous embodiment of the above embodiment, the radius of the core receiving portion, relative to the axis of rotation, begins at the holding portion and increases in size along the recess to the recess adjacent to the abutment. It is formed on the inner jacket surface of the core containing portion between the contact portion and the holding portion. If the blocking element is not held in the neutral position by the associated key, the blocking element is urged against the holding part by its preload in the normal position and upon rotation of the cylinder core in the direction of the limit position away from the normal position. Guided along the transition. Here, the blocking element each adopts its radial position, as a result of the preload, in contact with the corresponding point of the transition in each rotational position.

Here, the course of the radial extent of the transition along the circumferential direction is, depending on the respective rotational position of the cylinder core on the way from the normal position to the limit position or vice versa, from the limit position to the normal position: Defines the radial position of the blocking element. The blocking element is here held in the neutral position by the holding part in the normal position, but in the limit position the blocking element contacts a recess adjacent to the abutment part which has a larger radius compared to the holding part. and thus the blocking elements project radially outwardly beyond the neutral position at the limit positions of the cylinder core. The radius of the core receiving portion, i.e. the path of the radial extent of the transition portion, between the holding portion and the recess, preferably changes continuously, i.e. has no abrupt transitions, so that the blocking element can be It can be guided along the entire extent of the transition. Here, the radius preferably increases monotonically, but not strictly monotonicly, from the retaining portion to the recess, and this increase need not necessarily be uniform, but rather a curved range, for example, is also possible. be.

Such a transition can act as a kind of ramp whereby the blocking element automatically assumes a neutral position against its preload when the cylinder core rotates out of the limit position and into the normal position. is energized by This includes that upon actuation of the cylinder core with a key or tool not suitable for holding the blocking element in the neutral position, the cylinder core nevertheless rotates out of the limit position and back into the normal position. but even this requires the blocking element to be in a neutral position due to the retention. On the other hand, if there is no such transition between the recess and the holding part adjacent to the abutment, but rather a step, the blocking element cannot pass this step and therefore the cylinder core is captured at or within a range of rotation angles adjacent to the limit position. Since such a case can occur not only during unauthorized actuation of the locking device, but can also occur, for example, when the magnetization of the key associated with the locking device is reduced, the described configuration method does not actually allow the release again. It is advantageous to prevent blocking of the cylinder core in rotational positions different from the normal position, where this is not possible.

According to a further advantageous embodiment, a further abutment is formed on the inner jacket surface of the core receiving part, the further abutment being, compared to the abutment, opposite to the rotation starting from the normal position of the cylinder core. A further limit position of the cylinder core arranged in a direction and different from the normal position is defined by a further abutment, up to which further limit position the cylinder core is rotated starting from the normal position in the release configuration of the tumbler. freely rotatable in the opposite direction and, in its further limit position, the blocking element abuts the further abutment if it is not in the neutral portion, but rather projects radially outwards beyond the neutral position, and the further Blocks rotation in the direction opposite to the rotation of the cylinder core beyond the limit position. The functions and advantages mentioned with respect to the other abutment can not only be achieved with such a further abutment in one direction of rotation starting from the normal position, but also in a corresponding manner in the opposite direction of rotation. be able to.

In this respect, the inner jacket surface of the core housing begins--at least in an axial cross-section with respect to the axis of rotation, where the blocking elements are arranged--from where the blocking elements face each other in the normal position of the cylinder core, while at least Up to the abutment and on the other hand up to the further abutment can be formed symmetrically in the direction of rotation. The operation of the locking device is thus the same in each case regardless of the direction of rotation. The point, to which the inner jacket surface of the core receiving part is formed symmetrically in the direction of rotation, can in particular coincide with the center of the holding part in the circumferential direction.

According to a further advantageous embodiment, the locking device comprises a guide element which is inserted into a cutout of the base body provided on the inner jacket surface of the core receiving part and which has an abutment. If further abutments, retentions and/or transitions are provided, the guide element preferably also comprises one or more of these elements. In other words, the abutment in this embodiment is not formed directly on the base body, but rather on a guide element which is formed separately but fixed to the base body. A corresponding arrangement of the guide elements can thus at least partially themselves form part of the inner jacket surface of the core housing. Such an embodiment has the advantage, for example, that the guide element interacting with the blocking element can be made of a different material than the base body, in particular a material that may be particularly suitable for the function of the guide element. Thus, the base body of a conventional locking device can be retrofitted in the method according to the invention by introducing corresponding cutouts and inserting guide elements into the cutouts.

In such embodiments, it is further preferred that the notch has a continuously uniform cross-section tangential to the axis of rotation, ie the cross-section is at least substantially constant when viewed tangentially. The cutout can in particular extend from the outside of the base body into the base body tangentially to the axis of rotation, so that a guide element with a corresponding cross-section is advantageously inserted into the cutout along this extent. can do. In that case, the cutout extends from the outside of the base body at least to or along the inner jacket surface of the core housing, so that the inserted guide element is a blocking element of the cylinder core inserted into the core housing. can interact with The notch preferably extends completely through the base body, so that the guide element selectively extends into the notch from outside the base body at one of the two opposite ends of the notch. can be inserted into

In this way, the provision of tangential cutouts with a continuously uniform cross-section is advantageous for the assembly of the locking device, since the cutouts can be introduced into the base body by a reaming procedure from the outside of the base body. It also has advantages in the manufacturing of the base body. However, in general and alternatively also different types of formation of the cutouts can be considered. For example, notches can be introduced into the base body from within the core housing, eg as pocket milling.

According to a further advantageous embodiment, the blocking element has a pin shape extending along a pin axis radially aligned with respect to the axis of rotation, the pin shape being configured in particular symmetrically to the pin axis. can do. The pin axis is advantageously radially aligned with the axis of rotation so that it intersects the axis of rotation. More preferably, the blocking element is supported on the cylinder core so as to be linearly movable along its pin axis.

According to an advantageous further development of this embodiment, the blocking element has an enlarged diameter recessed with respect to the end faces, in particular with respect to two opposite end faces with respect to the pin axis. Each end face is in particular aligned perpendicular to the pin axis. The enlarged diameter portion preferably has a stepwise increasing diameter with respect to the adjoining portion of the blocking element, thus creating a shoulder, in particular a circumferential shoulder. On the side of the enlarged diameter portion facing the axis of rotation, such a shoulder serves as an engagement point for a preloading device, e.g. a helical spring, which preloads the blocking element radially outwards out of the neutral position. can do. On the side of the enlarged diameter portion facing away from the axis of rotation, such a shoulder abuts against the concave end of the shoulder when the cylinder core is rotated into the limit position and the blocking element is not held in a neutral position. It can interact with the abutment portion such that it fits into the convex end of the portion. A particularly stable interaction between the blocking element and the abutment can thereby be achieved.

According to a further advantageous embodiment, the blocking element and the tumbler are arranged such that they are movable at an angle to each other, in particular vertically. In this respect, the direction of movement of the tumbler on the one hand and the direction of movement of the blocking element on the other hand preferably has an angle of at least 30°, preferably of at least 45° and particularly preferably of about 90°. Such an angular, particularly vertical, arrangement makes picking of the lock device more difficult with a lock picking tool, as the blocking element and tumbler must be actuated in different directions.

According to a further advantageous embodiment, the keyway is substantially flat with two wide sides facing each other and parallel to the axis of rotation and two narrow sides facing each other and parallel to the axis of rotation. Having the shape of a parallelepiped, the blocking elements are movable perpendicular to the narrow sides. It is understood here that the narrow sides have a smaller width than the wide sides. Such an arrangement of the blocking elements allows inter alia interaction with corresponding narrow sides of the corresponding parallelepiped key shank of the associated key.

Here, it is further preferred that the blocking element adjoins one of the narrow sides of the keyway in the neutral position. An end face of the blocking element, in particular one of the end faces mentioned above, can for example adjoin a substantially flush narrow side in the neutral position. It is generally advantageous if the blocking element can, in its neutral position, possibly directly abut the keyway, and thus abut a key inserted into the keyway; The interaction of the associated key and blocking element holding in place is thereby simplified. The blocking element, in particular, can be held in a neutral position by means of magnetic force over such a short distance in a positive manner by means of the key without the need for particularly strong permanent magnets on the key for this purpose. Magnetization degradation is also less likely to be a problem at short distances.

A key according to the invention is adapted for use with a locking device according to the invention, in particular a locking device according to one of the embodiments described above, and when inserted into a keyway of a cylinder core of the locking device, On the one hand, the tumbler is arranged in a configuration that releases the cylinder core for rotation out of its normal position, and on the other hand it is further configured to hold the blocking element in a neutral position against its preload.

According to an advantageous embodiment, the key has a key shank extending along the key insertion direction and having a permanent magnet for holding the blocking element of the cylinder core of the locking device in a neutral position by magnetic force. The key can in particular have two permanent magnets arranged diametrically opposite each other, so that the key can be reversible in two directions of rotation 180° apart from each other about the axis of rotation. It can be inserted into the groove and can cooperate with the blocking element of the cylinder core. The key can also have permanent magnets at different points along the key insertion direction, in particular if the locking device has a plurality of blocking elements, each two permanent magnets are preferably arranged diametrically at corresponding points. be done.

According to an advantageous further development of this embodiment, the key shank has substantially two wide sides facing each other and parallel to the key insertion direction and two narrow sides facing each other and parallel to the key insertion direction. It has the shape of a flat parallelepiped with a permanent magnet arranged on one of the narrow sides. In the case of two or more permanent magnets, they are each preferably arranged in pairs on one narrow side and the other narrow side.

According to a further advantageous embodiment, the key has two wide sides extending along the key insertion direction and substantially opposite each other and parallel to the key insertion direction and a key shank having the shape of a flat parallelepiped with two narrow sides parallel to the key shank having a profile on at least one of its wide sides, the profile interacting with the tumbler , thereby placing the tumbler in the open configuration. The key shank can have, for example, notches, dimples, or corrugations as profiles that interact with the tumbler, the different depths of which correspond to the release configuration of the tumbler, so that the tumbler is set in this configuration and then , holds the tumbler in its configuration when the key is inserted into the keyway of the cylinder core.

A locking system according to the invention comprises a locking device according to the invention, in particular a locking device according to one of the above embodiments, and a key according to the invention, in particular a key according to one of the above embodiments, wherein the key is , is associated with the locking device in such a way that the locking device can always be actuated with the key.

A key blank according to the invention is configured for the manufacture of a key according to the invention, in particular a key according to one of the embodiments described above, and substantially comprises two wide openings facing each other and parallel to the key insertion direction. having the shape of a flat parallelepiped with sides and two narrow sides facing each other and parallel to the direction of key insertion, preferably profiled for interaction with the tumbler of the locking device according to the invention. A key shank configured to be provided by machining and having a permanent magnet inserted into at least one of the narrow sides.

The invention is further described below, by way of example only, with reference to the drawings.

1 shows an embodiment of a locking device according to the invention and a locking system according to the invention comprising a key according to the invention in two different rotational positions of the cylinder core, in perspective sectional view; FIG. 1 shows an embodiment of a locking device according to the invention and a locking system according to the invention comprising a key according to the invention in two different rotational positions of the cylinder core, in perspective sectional view; FIG. 1 shows in perspective view an embodiment of a key according to the invention; FIG. 2 shows in a perspective sectional view a part of the embodiment of the locking system according to the invention shown in FIG. 1; FIG. Fig. 3 shows a part of another embodiment of a locking device according to the invention in a perspective sectional view; Fig. 3 shows a part of another embodiment of a locking device according to the invention in a perspective sectional view; Figure 5 shows a top view of the base body of the embodiment shown in Figures 4a and 4b; Figure 5 shows a perspective view of the guide element of the embodiment shown in Figures 4a and 4b;

The embodiments of the locking device 11 according to the invention, shown at least partially in FIGS. 1a, 1b, 2 and 3 respectively, are configured as locking cylinders, ie profile cylinders. The cylinder housing of this lock cylinder comprises a substantially hollow cylindrical portion and a web portion extending radially therefrom (downwardly in FIGS. 1a and 1b) relative to the cylindrical axis of the locking device 11. A base body 13 is formed.

The inner space of the hollow cylindrical portion forms a core accommodating portion 15 in which a substantially cylindrical cylinder core 17 is accommodated. In this regard, the outer jacket surface of the cylinder core 17 is in flush contact with the inner jacket surface of the core receiving portion 15, where at the core receiving portion 15 the cylindrical axis of the hollow cylindrical portion of the base body 13 and the core receiving surface are aligned. It is rotatable about its own cylindrical axis coinciding with the cylindrical axis of part 15 . The cylindrical axis thus forms the axis of rotation R with which the cylinder core 17 can rotate.

A keyway 19 is formed in the cylinder core 17 and substantially has two wide sides facing each other and parallel to the axis of rotation R (facing upwards and downwards respectively in FIGS. 1a and 1b), and and has the shape of a flat parallelepiped with two narrow sides parallel to the axis of rotation R (facing left and right respectively in FIGS. 1a and 1b). The keyway 19 is aligned with the axis of rotation R such that one of the narrow sides is further from the axis of rotation R than the other, while the two wide sides are preferably equally far from the axis of rotation R. It is arranged so as to be eccentric. One of the narrow sides may in particular adjoin the outer jacket surface of the cylinder core 17 as in the embodiment shown.

The locking device 11 comprises a plurality of tumblers 21, only one of which is visible in cross-section in Figures Ia and Ib. The tumbler 21 is partially housed in the cylinder core 17 and partially in the web portion of the base body 13 , is radially movable with respect to the axis of rotation R, and includes a core pin 23 and a housing pin 25 . In the illustrated position of the tumbler 21, the core pin 23 is completely within the cylinder core 17 and the housing pin 25 is completely within the base body 13, so the interface between the core pin 23 and the housing pin 25 is , coincides with the interface between the outer jacket surface of the cylinder core 17 and the inner jacket surface of the core housing 15, thus also comparing to FIG. As shown, the cylinder core 17 is not prevented by the tumbler 21 from rotating out of the normal position of the cylinder core 17 shown in FIG. 1a.

In this regard, the position of the tumbler 21 shown in FIG. 1a represents a position that releases the cylinder core 17 for rotation. In this regard, the release position of the tumbler 21 depends respectively on the length of the core pin 23, which can be different for different tumblers 21. A release configuration of tumblers 21 exists when all tumblers 21 of locking device 11 are in their respective release positions. In this case, the cylinder core 17 can only rotate when out of the normal position, in which it is blocked against rotation.

The tumbler 21 can be moved to the open configuration by means of a key 27 associated with the locking device 11, shown separately in FIG. It has a facepiece key shank 29 . The key shank has a profile 30 on the wide side of the parallelepiped parallel to the key insertion direction, which pulls the tumbler 21 against the respective tumbler spring 31 when the key 27 is fully inserted into the keyway 19. Biasing to their respective release positions (see FIG. 1a). Thus, the inserted key 27 allows rotation of the cylinder core out of the limit position shown in FIG. 1a and into the limit position shown in FIG. 1b.

A pin-like blocking element 33 is movably supported on the cylinder core 17, the pin axis of which is radially aligned with the axis of rotation R and radially with respect to the axis of rotation R along the pin axis. can move. In this respect, the blocking element 33 is preloaded radially outwards by means of a preloading device 35 formed as a helical spring. As can be discerned particularly in the enlarged view of FIG. 3, the blocking element has an enlarged diameter portion 37 recessed with respect to the radially opposed end faces of the blocking element 33, thus two shoulders 39, 39' is formed. The preload device 35 engages at a radially inner shoulder 39 .

The blocking element 33 is surrounded by a sleeve 41 , which is of at least substantially hollow cylindrical shape and, like the blocking element 33 , radially aligned with the axis of rotation R. At its radially inner end, the sleeve 41 has a reduced inner diameter 43 whereby a further shoulder 45 is formed (see FIG. 3), where the preload device 35 is applied to the blocking element 33 radially outwardly. Orientationally supported to preload. The blocking element 33 is inserted with the sleeve 41 into a hole 47 in the cylinder core 17 that extends radially from the outer jacket surface of the cylinder core 17 to the narrow side of the keyway 19 . Due to the sleeve 41 in which the shoulder 45 for the preload device 35 is formed, the hole 47 need not have a shoulder to support the preload device 35 and thus can have a constant cross-section, especially a circular cross-section. and therefore can be provided on the cylinder core 17 particularly easily from a technical production point of view.

Each permanent magnet 49 is inserted into a respective narrow side magnet receiver and is provided on two narrow sides of the key shank 29 parallel to the key insertion direction and facing each other, thus the permanent magnets are , ending flush with the narrow side. The permanent magnets 49 and the magnet receivers are each of a shape corresponding to each other, preferably as flat half-cylinders, as shown for one of the two permanent magnets 49 in FIG. It has a semi-circular shape that can be formed.

The permanent magnet 49 is arranged along the key insertion direction such that when the key shank 29 of the key 27 is inserted into the keyway 19 it is axially arranged at the level of the blocking element 33 with respect to the axis of rotation R. (see Figures 1a, 1b and 3). In this way, one of the two permanent magnets 49 is positioned so as to magnetically attract the blocking element 33 depending on which of the two possible directions of rotation the key 27 is inserted into the keyway 19 . 33, thereby holding the blocking element in its neutral position shown in FIGS. 1a and 3 against its preload.

On the other hand, if no key is inserted, or in particular if an unauthorized key without a permanent magnet 49 where required, is inserted into the keyway 19, the blocking element 33 will remain in its neutral position due to its preload. In contrast, it can be moved radially outwards into a position where it projects above the outer jacket surface of the cylinder core 17 . In this position, the blocking element 33 abuts circumferentially against an abutment 51 formed on the inner jacket surface of the core receiving portion 15 when the cylinder core 17 is rotated out of the normal position (see FIG. 1b). In this respect, the limit position of the cylinder core 17 shown in FIG. Starting from the normal position, in the first direction of rotation (clockwise in the example shown), it is not possible to rotate beyond the limit position as long as it can be passed.

When the blocking element 33 abuts the abutment 51 , the radial one of the shoulders 39 , 39 ′ formed by the enlarged diameter portion 37 just contacts the inner jacket surface of the core receiving portion 15 . The blocking element 33 is hereby particularly reliably supported at the abutment 51 and therefore cannot overcome blocking of the cylinder core 17 beyond the limit position.

A further abutment 51 ′ is formed on the inner jacket surface of the core receiving part 15 and defines, in a corresponding manner to the abutment 51 , a further limit position of the cylinder core 17 , which blocks the blocking element 33 . is not held in a neutral position and thereby can pass the abutment 51', starting from the normal position, a second direction of rotation opposite to the first direction of rotation (example shown counterclockwise) cannot be rotated beyond the limit position. The abutments 51, 51' are at least substantially symmetrical to each other.

A permanent magnet 49 provided on the key shank 29 of the associated key 27 is strong enough to attract the blocking element 33 to the neutral position out of its position set radially outwardly with respect to the neutral position. can be However, this is because in the normal position of the cylinder core 17 shown in FIG. Advantageously, this is not absolutely necessary, since it is held in the neutral position by the holding part 53 . The two abutments 51 , 51 ′ are each here arranged at an equal distance in the circumferential direction from the retaining part 53 , so that the two limit positions are of opposite rotation relative to the normal position of the cylinder core 17 . direction, but with the same rotation angle.

As well as between the further abutment 51' and the retaining portion 53, the radius of the core receiving portion 15 relative to the axis of rotation R, starting from the retaining portion 53 and adjoining the respective abutment 55, 55'. A respective transition 55, 55', which increases to a respective recess 57, 57', is formed between the abutment portion 51 and the retaining portion 53. As shown in FIG. Thereby, a continuous, but not necessarily uniform, e.g. occurs between In this respect, the transitions 55, 55' act as ramps along which the radially outer end faces of the blocking elements 33 slide due to the preload, so that the blocking elements 33, when the cylinder core 17 rotates, It is biased out of one of the two limit positions to the normal position and back to its neutral position. Therefore, rotation of the cylinder core 17 out of its limit position into the normal position is not particularly blocked, as for example if a step were formed between the respective recess 57, 57' and the retaining part 53.

The retaining portion 53, the transition portions 55, 55', the recesses 57, 57' and the abutment portions 51, 51' are each not formed directly on the base body 13, but rather on the guide element 59, It is separate from the base body and is inserted into a notch 61 of the base body 13 provided on the inner jacket surface of the core housing portion 15 . In the embodiment shown in Figures 1a and 1b, the notch 61 was introduced into the base body 13 as pocket milling. Figures 4a, 4b, 5 and 6 show an alternative embodiment in which a notch 61' is introduced into the base body 13 from outside the base body 13 by means of a reaming procedure.

As can be appreciated in particular in FIG. 5, the notch 61' of this embodiment has a constant cross-section with respect to the longitudinal axis and the arrangement of the longitudinal axis tangent to the axis of rotation R can be thought of as a geometric body that is removed from the base body 13 at , and thus has a continuously uniform cross-section. In this way, a guide element 59 ′ (see FIG. 6 ) with a corresponding cross-section can advantageously be pushed into the cutout 61 ′ only from outside the base body 13 and not from the core receiving portion 15 .

The notch 61' can, for example, have the cross-section shown in Figure 5 having the shape of an at least substantially isosceles trapezoid. The notch 61 ′ is continuously open towards the outside of the base body 13 , since here the rectangle adjoins the shorter base side of the trapezoid. However, the notch 61' can also generally be closed like a passage, opening only at two ends of its longitudinal extent, or only at one end, towards the outside of the base body 13. . On the other hand, since the notch 61 ′ is at least so open towards the core receiving portion 51 , the guide element 59 ′ can be positioned within the notch 61 ′, thereby allowing at least the abutment portion 51 , and optionally also further abutments 51 ′, retaining portions 54 , transitions 55 , 55 ′ and/or recesses 57 , 57 ′, so that they can interact with the blocking element 33 of the cylinder core 17 , It is arranged on the inner jacket surface of the core housing portion 15 .

11 locking device 13 base body 15 core housing 17 cylinder core 19 keyway 21 tumbler 23 core pin 25 housing pin 27 key 29 key shank 30 profile 31 tumbler spring 33 blocking element 35 preload device 37 enlarged diameter 39, 39' shoulder 41 sleeve 43 reduced inner diameter portion 45 shoulder portion 47 hole 49 permanent magnets 51, 51' contact portion 53 holding portions 55, 55' transition portions 57, 57' recesses 59, 59' guide elements 61, 61' notch R rotation shaft

Claims (15)

A locking device (11) comprising: a base body (13) having a core housing (15); a cylinder core (17) having a keyway (19) for a key (27) received and associated with said locking device (11); (17) is configured to block said cylinder core (17) in its normal position against rotation out of said normal position. a plurality of tumblers (21),
Said cylinder core (17) is movably supported and preloaded radially outwardly with respect to said axis of rotation (R), said preload being actuated by said associated key (27). having a blocking element (33) configured to be held in a neutral position against
A contact portion (51) is formed on the inner jacket surface of the core housing portion (15), and the limit position of the cylinder core (17) different from the normal position is defined by the contact portion (51). , up to said limit position said cylinder core (17) is freely rotatable starting from said normal position in said open configuration of said tumbler (21) and in said limit position said blocking element (33) contacts the contact portion (51) to block rotation of the cylinder core (17) beyond the limit position when the cylinder core (17) is not in the neutral position;
said blocking element (33) has a pin shape extending along a pin axis radially aligned with said axis of rotation (R);
The blocking element (33) is provided between a first portion and a second portion forming both end portions of the pin shape and between the first portion and the second portion in the axial direction of the pin axis. a located enlarged portion (37);
the diameter of said enlarged diameter portion (37) is greater than both the diameter of said first portion and the diameter of said second portion;
a locking device (11); 2. Locking device according to claim 1, wherein said blocking element (33) is arranged to be held in said neutral position by magnetic force by said associated key (27). In said normal position of said cylinder core (17), a retaining portion (53), which retains said blocking element (33) in said neutral position against said preload, is attached to said inner jacket of said core receiving portion (15). 3. A locking device according to claim 1 or 2, formed on a surface. A transition (55) is formed on the inner jacket surface of the core receiving portion (15) between the abutment portion (51) and the retaining portion (53), the radius of the core receiving portion (15) increases with respect to the axis of rotation (R) along said transition (55) starting from said retaining portion (53) to a recess (57) adjacent to said abutment portion (51). Locking device as described. A further abutment (51') is formed on the inner jacket surface of the core receiving part (15), the further abutment (51') being greater than the abutment (51) , a further limit position of the cylinder core (17) arranged in the opposite direction of rotation starting from the normal position of the cylinder core (17) and different from the normal position is defined by the further abutment (51'). and up to said further limit position said cylinder core (17) is freely rotatable in said released configuration of said tumbler (21) starting from said normal position in the opposite direction of said rotation and said limit position In, said blocking element (33), when not in said neutral position, abuts against said further abutment (51') to prevent the movement of said cylinder core (17) in the opposite direction of said rotation beyond said further limit position. Locking device according to any one of claims 1 to 4, which blocks rotation. Said inner jacket surface of said core housing (15) is such that, at least in axial cross-section with respect to the axis of rotation (R) on which blocking elements (33) are arranged, said blocking elements (33) symmetrically formed in the direction of rotation starting from opposite points in the normal position, at least up to the abutment (51) on the one hand and to the further abutment (51′) on the other hand; 6. Locking device according to 5. said locking device includes a guide element (59) inserted into a notch (61) provided in said inner jacket surface of said core housing (15) and having said abutment (51); Locking device according to any one of claims 1-6. 8. Locking device according to claim 7, wherein the notch (61) has a continuously uniform cross-section in the tangential direction of the rotation axis (R). Locking device according to any one of the preceding claims, wherein said blocking element (33) and said tumbler (21) are arranged to be movable at an angle relative to each other. Said keyway (19) has substantially two wide sides facing each other and parallel to said rotation axis (R) and two narrow sides facing each other and parallel to said rotation axis (R). has the shape of a flat parallelepiped with
Locking device according to any one of the preceding claims, wherein said blocking element (33) is movable perpendicular to said narrow side. 11. Locking device according to claim 10, wherein the blocking element (33) abuts one of the narrow sides of the keyway (19) in the neutral position. a locking device (11) according to at least any one of claims 1 to 11;
A key (27) for use with said locking device (11), said key (27) being inserted into said keyway (19) of said cylinder core (17) of said locking device (11). If present, said tumbler (21) is arranged in a configuration that releases said cylinder core (17) for rotation out of said normal position, and said blocking element (33) against its preload to its neutral position. a key (27) configured to be held in
comprising
lock system. The key (27) extends along the key insertion direction and is a permanent magnet for holding the blocking element (33) of the cylinder core (17) of the locking device (11) in the neutral position by magnetic force. 13. Locking system according to claim 12, comprising a key shank (29) with (49). The key shank (29) is substantially flat with two wide sides facing each other and parallel to the key insertion direction and two narrow sides facing each other and parallel to the key insertion direction. has the shape of a parallelepiped,
14. Locking system according to claim 13, wherein the permanent magnet (49) is arranged on one of the narrow sides. The key (27) extends along the key insertion direction and has substantially two wide sides facing each other and parallel to the key insertion direction, and two wide sides facing each other and parallel to the key insertion direction. a key shank (29) having the shape of a flat parallelepiped with two narrow sides;
said key shank (29) has a profile (30) that interacts with said tumbler (21) on at least one of its wide sides whereby said tumbler (21) is placed in said open configuration; Locking system according to any one of claims 12-14.

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