EP3155191A1

EP3155191A1 - Cylinder lock

Info

Publication number: EP3155191A1
Application number: EP15728530.5A
Authority: EP
Inventors: Ernst PANKRATIUS; Gerhard Meckbach
Original assignee: ABUS August Bremicker Soehne KG
Current assignee: ABUS August Bremicker Soehne KG
Priority date: 2014-06-13
Filing date: 2015-06-12
Publication date: 2017-04-19
Anticipated expiration: 2035-06-12
Also published as: US10087655B2; TW201615948A; CN106574467B; EP3155191B1; US20170254113A1; CN106574467A; WO2015189367A1; ES2768750T3; DE102014108355A1; DK3155191T3; TWI654360B

Abstract

A cylinder lock comprises a cylinder housing (11) and a cylinder core (13) which is rotatably mounted in the cylinder housing. A plurality of plate tumblers (21) are provided in the cylinder core, wherein each of the plurality of plate tumblers is movable between a locking position and an unlocking position. At least one of the plurality of plate tumblers has a bolt-receiving depression (47). The cylinder lock further comprises at least one bolt element (27) which has a bolt tip (35), wherein the bolt element is movable between a blocking position and a release position. In the release position, the bolt tip engages in the bolt-receiving depression of the plate tumbler. The plate tumbler has, adjacent to the bolt-receiving depression, at least one bolt latch-in depression (45) in which the bolt tip of the bolt element engages in a latching manner when the at least one plate tumbler is moved out of the unlocking position, wherein the bolt latch-in depression is less deep than the bolt-receiving depression.

Description

cylinder lock

The invention relates to a cylinder lock with a cylinder housing and a cylinder housing rotatably mounted in the cylinder housing, wherein the cylinder housing has at least one Zuhaltungsblockiervertiefung and a Biegelblockiervertiefung. A plurality of die tumblers are provided in the cylinder core, each of the plurality of die tumblers having an engagement portion and movable between a lock position and an unlock position. In the locking position, the engagement portion of the respective blade maintenance engages the tumbler locking recess of the cylinder housing. In the unlocked position, the engagement portion is disengaged from the tumbler locking recess. At least one of the plurality of platelet retainers has a latch receiving recess. The cylinder lock further comprises at least one latch member having a latch tip and a blocking portion, the latch member being movable between a blocking position and a release position and biased to the release position. In the blocking position, the blocking portion of the locking element engages in the locking block recess of the cylinder housing. In the release position, the latch tip engages in the latch receiving recess of the at least one die assembly, and the blocking portion is disengaged from the latch locking recess of the cylinder housing. In such a cylinder lock, the plate tumblers and the locking element serve to lock the cylinder core against rotational movement relative to the cylinder housing in their respective basic position (locking position or blocking position in the locked state of the cylinder lock). Only when an associated (ie correctly coded) key is inserted into the cylinder core through the key insertion openings of the platelet tumblers, the cylinder core can be rotated by means of the key in an opening direction of rotation. A problem with such a cylinder lock is the so-called lock picking. This is an attempt to manipulate a cylinder lock, ie to open it non-violently without the assigned key. For this purpose, special opening tools are used with which the platelet tumblers are displaced from their respective locking position against their biasing direction into their respective unlocking position, while at the same time a torque is exerted on the cylinder core in an opening direction of rotation. According to one method ("setting" of the platelet tumblers), the platelet tumblers are displaced one after the other, so that ultimately all the platelet tumblers catch on the edge of the tumbler locking recess of the cylinder housing and the cylinder core can finally be rotated further in the opening direction of rotation. According to another method (sensing the codes), the respective unlocking position is identified by an altered resistance in displacing the plate tumbler counter to the respective biasing direction, wherein the changed resistance by means of a suitable tool manually palpated and / or can be detected acoustically. Due to the thus determined offset paths covering the platelet tumblers between the respective locking position and unlocking position, a correspondingly coded key can be reworked, which is then able to open the cylinder lock without damage.

Cylinder locks of the type described above are disclosed in the patents US 1965336, US 4185482 and US 6978647 B2. In the patent

US Pat. No. 6,978,647 B2 additionally discloses a lock-picking tool which can be used for the follow-up described above. The patent US 8695390 B2 discloses a cylinder lock with a pivotable belt. gel element which engages adjacent to a latch receiving recess in a toothed zone of the respective plate tumbler to lock the platelet lock against movement when a torque in the opening direction of rotation is exerted on the cylinder core. While such cylinder locks have been proven in practice and already a high degree of protection against manipulation is achieved, there is a need to further increase the Nachschließsicher- in cylinder locks with platelet tumblers.

It is therefore an object of the invention to provide a cylinder lock, which has an improved security against manipulation, in particular with respect to the described Nachschließen the method of sensing the coding of the platelet tumblers.

This object is achieved by a cylinder lock with the features of claim 1, and in particular in that said at least one platelet lock having a latch receiving recess adjacent to the latch receiving recess has at least one latch engagement recess in which the latch tip of the latch member is latchingly engaged; when the at least one wafer tumbler is offset from the unlocked position by a first path length, the latch detent groove being less deep than the latch receiving recess of the platelet tumbler.

In the cylinder lock according to the invention, a rotation of the cylinder core is prevented in the closed state by two locking mechanisms explained below. On the one hand, plate tumblers in their locking position engage with a respective engagement section in a tumbler blocking recess of the cylinder housing, wherein the platelet tumblers are preferably biased into the locking position along a respective first biasing direction. On the other hand, at least one locking element in its blocking position engages with its blocking section in a locking blocking recess. tion of the cylinder housing, wherein the locking element is preferably biased along a second biasing direction in a release position. Only when all platelet tumblers are in the respective unlocked position, ie out of engagement with the Zuhaltungsblockiervertiefung, and the locking element in the release position, that is out of engagement with the latch locking recess, the cylinder core in the cylinder housing is freely rotatable. In this state, the locking element engages in a latch receiving recess of the respective plate tumbler, which is preferably provided on a longitudinal side of the plate tumbler.

When decoding according to the method of sensing the codes, as explained, the respective unlocking position of the plate tumbler is identified by an altered resistance in displacing the plate tumbler. Such a changed resistance to movement occurs in particular when the respective platelet locking arrives in the unlocking position and the locking element thus engages in the latch receiving recess of the platelet cage due to its bias (completely or only partially, the latter if not all of the locking element associated Platelet tumblers in their Entriegelungspositon are located). This changed resistance in displacing the plate tumbler is referred to hereinafter as the first change in resistance.

In the closed state of the cylinder lock according to the invention, the described Nachschließen is now complicated by the fact that a second change of resistance is realized by a latching (ie springback) engagement of a locking tip of the locking element in a Riegeleinrastvertiefung the associated platelet locking when moving the platelet locking, which in addition to the explained first change of resistance occurs. Thus, in attempting to sense the encodings, there is the ambiguity of what change in resistance (first or second change) in the manipulative Activation of the plate tumbler is currently palpated, that is, whether the currently sensed change in the resistance to movement is actually caused by the achievement of the unlocking position of the plate tumbler. Thus, in the closed state of the cylinder lock, the respective plate tumbler can be displaced from the locking position in the direction of the unlocking position (even if at the same time a torque is exerted on the cylinder core in the direction of opening rotation). However, several latching connections between the locking element and the plate tumbler and thus several changes in the movement resistance must be overcome along the offset path of the plate locking device, since the locking tip slides along the respective longitudinal side of the platelet cage and engages in the latch engagement recess and in the latch receiving recess. As a result, the palpation of the unlocking position of the plate tumbler by means of a lock-picking tool is made more difficult.

The latch engagement recess is provided adjacent to the latch receiving recess into which the latch tip of the latch member engages when all of the latch tumblers associated with the latch member are in their unlocked position and the latch member can thus assume the release position. As "adjacent" in this context, an arrangement is to be understood in which the locking latch recess (although necessarily) by an intermediate elevation of the latch receiving recess is separated and thus spaced from the latch receiving recess. However, the distance between the latch engagement recess and the latch receiving recess is less than the displacement of the respective platelet locking (distance between the locking position and the unlocking position), so that when it detects an altered resistance to movement the explained uncertainty exists as to whether the respective platelet locking actually in the unlocking position is located. In particular, the at least one latch engagement recess may be arranged adjacent to the latch receiving recess of the respective latch plate be that the width of a intermediate elevation provided between the latch engagement recess and the belt receiving recess is less than the clear width of the bolt receiving recess, and preferably also less than the inside width of the latch latch recess.

Thus, the latching engagement of the latch tip of the latch member with the latch latch recess of the plate tumbler is directly established when the at least one platelet latch is offset relative to the unlock position, at the platelet lock the latch latch recess is less deep than the latch receiving recess (relative to the direction of movement of the biased latch member). , The length of the locking element is chosen so that, if the at least one platelet locking is at least partially in the locking position, on the one hand, the locking tip of the locking element latching in the locking latch recess of the platelet lock can engage and on the other the blocking portion of the locking element nonetheless in the locking latch recess of Cylinder housing engages. Thus, by making the latch detent recess less deep than the latch receiving recess of the blade tumbler, it is achieved that the latch member maintains its blocking function even when the latch tip engages the latch latch recess (and not the latch receiving recess). Preferably, the inside width of the locking latch recess (ie the opening width along the direction of displacement of the plate tumbler) is also smaller than the clear width of the latch receiving recess. Of course, according to the desired embodiment and required safety aspects, in addition to the one tumbler locking recess and one latch locking recess, a plurality of tumbler blocking recesses and latch blocking recesses may be provided, and correspondingly, multiple latch members are possible. For a better understanding, it should be mentioned that the invention is described in large part with reference to at least one plate tumbler, since the invention can in principle already be realized by cooperation of the latch element with a single plate tumbler. Preferably, however, a respective locking element is assigned to a group of a few platelet tumblers. In this case, the interaction of the locking element, in particular the described engagement of the locking tip in the locking receiving recess or the engagement of the locking tip in the locking latch recess, at least with one of the platelet tumblers from the associated group, in particular with that platelet locking, which is brought last in the unlocked position , For example, it may be that the locking tip of the locking element, which bears against a plurality of platelet tumblers, only partially engages in the latch engagement recess of a particular platelet locking, namely, when the other platelet tumblers are offset by a certain path length relative to a certain platelet locking.

Advantageous embodiments of the invention are mentioned below and in the dependent claims. According to an advantageous embodiment, the at least one platelet cage adjacent to the latch receiving recess has a plurality of juxtaposed latch engagement recesses. This ensures that during a manipulative displacement of the platelet locking along a wide displacement range a plurality of changes in resistance - that is, not only the explained first and second change of the movement resistance - caused by the latching engagement of the locking tip of the locking element in the respective latch locking recess. This makes it even harder to feel the unlocking position of the plate tumbler. Advantageously, just as many latch engagement recesses can be provided next to one another adjacent to the latch receptacle recess, such that the latch tip of the latch element is provided for each latch possible position of the Plattchenzuhaltung outside the unlocking position always latching engages in a latch engagement recess of the Plattchenzuhaltung.

According to a further advantageous embodiment, the plate tumbler comprises on each side of the latch receiving recess at least one latch engagement recess, i. not just on a single side of the latch receiving recess. This is particularly advantageous when the platelets tumble against each other in opposite directions, i. are biased in two opposite directions, or if the plate tumbler is so displaceable that the locking tip of the locking element can be located on both sides of the latch receiving recess of the plate tumbler and can act on the platelet tumbler. Above all, this results in a further change in the resistance to movement when the respective plate tumbler is moved beyond the unlocking position in the attempt to feel the unlocking position.

According to a further advantageous embodiment, the plate tumbler on both sides of the latch receiving recess each have a plurality of juxtaposed latch locking recesses. This makes it possible to ensure that the above-described resistance changes during the displacement of the wafer holders along a wide offset region on both sides of the bolt receiving recess are realized by a latching engagement of the bolt tip in the respective bolt locking recess, whereby the security against theft is increased. The latch receiving recess is advantageously provided with respect to the direction of movement of the plate tumbler on a side edge of the plate tumbler, which preferably runs parallel to the direction of displacement of the plate tumbler. As a result, a low-friction and thus reliable displacement of the plate tumbler is accomplished when the locking tip of the locking element on the side edge. Furthermore, several juxtaposed nete Plattchenzuhaltungen in a space-saving manner abut the bolt tip, whereby a compact size for the cylinder core can be achieved.

According to a further advantageous embodiment, the latch receiving recess and the latch engagement recess are (at least) substantially triangular in shape. A substantially triangular depression is in particular still present if the outline of the depression is formed as a blunt tip and / or with curved flanks. Due to the substantially triangular design of the recesses, on the one hand, a stable positive connection between the respective recess and the locking element engaging in the respective recess is achieved; on the other hand, the stable positive locking can be achieved simply by displacing the plate tumblers with a suitable force (for example by means of the associated key). be lifted, whereby the locking element is urged against its bias from the respective recess.

According to a further advantageous embodiment, an intermediate elevation is provided between the latch receiving recess and the locking latch recess of the platelet locking device, wherein the intermediate elevation of the platelet locking device is adapted to engage in the intermediate recess of the locking point when the platelet locking device is in the unlocking position is offset by a second path length which is less than the first path length (which corresponds to the engagement of the latch tip in the latch latch recess). This feature ensures in a simple manner that the locking element with its locking tip receives a further latching form-locking connection with the plate tumbler, namely already immediately after the locking element has been forced out of the latch receiving recess by displacing the platelet cage by the relatively small second path length. Due to the temporary detent caused thereby, a further (ie third) change in the resistance to movement of the plate causes chenzuhaltung in their displacement, namely already when the platelet locking is just not in the unlocking position. By this feature, the desired Nachschließsicherheit is therefore particularly well guaranteed.

According to a particularly simple embodiment, the intermediate recess of the locking tip may be formed as a groove, which preferably extends parallel to the axis of rotation of the cylinder core, in particular if the locking element is elongated and associated along the axis of rotation of the cylinder core of a group of some platelet tumblers. Such a groove may be rectilinear. Alternatively, however, the groove can not be rectilinear, but for example arcuate. Alternatively or additionally, such a groove can also run obliquely to the axis of rotation of the cylinder core. By means of such modifications, a greater variance of the possibilities of engagement between the groove and the latch engagement recess or the intermediate collection of the plate locking mechanism can be achieved, which increases the picking safety.

According to a further advantageous embodiment, the locking element between the locking tip and the blocking section has a connecting section, which is narrower than the blocking section of the locking element, viewed along a tangential direction about the axis of rotation of the cylinder core. the connecting portion is tapered like a neck. This results in the possibility of a targeted torsional backlash of the cylinder core relative to the cylinder housing, which can advantageously increase the Nachschließsicherheit, as will be explained in more detail below.

According to an advantageous embodiment, the connecting portion of the locking element on one side, which points in an opening direction of rotation of the cylinder core, with respect to the blocking portion of the locking element is not or no niger far set back than at another (opposite) side, which points against the opening direction of rotation of the cylinder core. In particular, the side of the connecting portion pointing in the opening direction of rotation of the cylinder core can be flat and flush with the blocking portion of the belt member, the other side of the connecting portion being obliquely formed and / or set back relative to the blocking portion. As a result, the rotational play of the cylinder core to be explained below is favored. Specifically, the connecting portion of the latch member on one side facing in the opening rotational direction of the cylinder core, flush with the locking portion of the locking element and on the other side facing the opening direction of rotation of the cylinder core, be set back relative to the blocking portion of the locking element, so that the blocking section only forms a lateral projection on the said other side. Such a lateral projection can, in a tampering attempt, in which the cylinder core is acted upon in the opening direction by a torque effect that the locking element remains in its blocking position and thus prevents manipulative rotation of the cylinder core, since the lateral projection in this case over the outer circumferential surface of the cylinder core is urged. Since no such lateral projection and accordingly no return is provided on said one side, which points in the opening direction of rotation of the cylinder core, the manipulative rotational movement in the opening direction causes the desired displacement of the lateral projection over the outer circumferential surface of the cylinder core.

According to a preferred embodiment, the locking element is associated with a retaining plate, which has a bearing opening, which is penetrated by the connecting portion of the locking element when the locking element is in the blocking position. If the at least one platelet tumbler itself is located in the bail position and the locking element is in the blocking position, there is, based on a rotational actuation of the cylinder core relative to the cylinder housing, a first torsional backlash between the locking portion of the locking element and the latch locking recess of the cylinder housing. Further, in the above state, there is a second torsional backlash between the connecting portion of the locking member and the bearing hole of the associated retaining plate. A third torsional backlash exists between the engaging portion of the at least one plate tumbler and the tumbler locking recess of the cylinder housing. In this embodiment, the first backlash is less than the second backlash, and the second backlash is again lower than the third backlash.

By thus established quantitative differences in the Verdrehspielen is achieved that the locking element between the latch receiving recess and the holding plate can easily tilt or tilt when the

Blocking portion of the locking element engages in the latch locking recess of the cylinder housing and on the cylinder core torque in an opening direction of rotation is applied (especially in the case of a manipulation attempt). Nevertheless, the latching engagement of the locking tip of the locking element with the Latch detent recess of the platelet locking remains, whereby the explained second change of resistance in the displacement of the platelet locking despite a tilting of the locking element remains and assigning the sensed resistance to movement is made difficult to a fixed position of the platelet. Due to the fact that the first and second torsional backlashes are smaller than the third torsional backlash, it is also prevented that the boundaries of the

Tumble blocking depression can be exploited to successively bring the platelet retainers into the unlocking position according to the "setting" method explained above, whereby the security against theft is even further increased. The locking element is preferably mounted linearly (ie rectilinear) displaceable. With respect to the axis of rotation of the cylinder core, the locking element is preferably mounted displaceably in the radial direction. According to an advantageous embodiment, a holding plate, in particular the holding plate already mentioned above, is arranged between the cylinder core and the cylinder housing, wherein a locking element associated with the locking element is supported between the holding plate and the locking element. Preferably, the retaining plate is positively received in a recess on the outside of the cylinder core and flush outside. By arranging the latch pretensioning device between the holding plate and the locking element, the locking element can be biased particularly easily in the direction of the platelet stops, in particular in the radially inward direction, thereby ensuring that the locking tip of the locking element always bears against the respective platelet locking device and acting on this, so that a stable positive engagement is ensured upon engagement of the locking tip in the bolt receiving recess or the latch locking recess. The retaining plate is preferably curved, wherein a bearing opening of the retaining plate, in particular the above-mentioned bearing opening, can be designed so that the blocking portion of the locking element engages positively in the release position in the bearing opening and forms an externally flush termination with the retaining plate. The retaining plate can be freely floating inserted into the recess on the outside of the cylinder core (in particular with game), resulting in an improved picking safety by a greater torsional backlash of the cylinder core. Alternatively, the retaining plate can be pressed into the recess on the outside of the cylinder core. By such a press fit results in a simpler installation, and a hooking of the holding plate in the Zuhaltungsblo- ckiervertiefung the cylinder housing with a rotational movement of the cylinder core (in the direction of the closed position) is reliably avoided. According to a further advantageous embodiment, each platelet holder of a group comprising some or all of the plurality of platelet tumblers comprises a latch receiving recess and at least one latch engagement recess, the latch member extending along the axis of rotation of the cylinder core, and wherein in the release position of the latch member the latch tip engages the latch receiving wells of the group of platelet tumblers. For example, a single locking element may be associated with all the platelet tumblers of the cylinder lock in order to interact with them, or a single locking element is associated with a subset of the platelet tumblers (eg, every other one). Alternatively, a plurality of locking elements may be provided which are arranged axially one behind the other and are effective independently. Furthermore, two locking elements may be provided, which may be arranged diametrically opposite with respect to the axis of rotation of the cylinder core. The respective locking element may extend parallel or obliquely to the axis of rotation of the cylinder core, and it may be rectilinear or non-rectilinear (for example, arcuate). Depending on which safety requirements to meet the cylinder lock, a suitable complexity of the cylinder lock in the sense of the above-explained alternatives can be selected.

In a preferred embodiment, the plurality of die tumblers are biased to the respective lock position along a first biasing direction, the latch member being biased to the release position along a second biasing direction, and wherein the first biasing direction and the second biasing direction are perpendicular or oblique. In this case, the first biasing direction can be directed radially outward with respect to the axis of rotation of the cylinder core, whereby the platelet tumblers basically, ie in their basic position, engage with their respective engagement portion in the tumbler locking recess of the cylinder housing and lock the cylinder core with respect to rotation. In contrast, the second prestressing direction tion, ie the biasing direction of the locking element, directed radially inward, whereby a dual functionality of the locking element is ensured. On the one hand, as already explained, the locking element should undergo a latching positive engagement with the latch engagement recess of the plate tumbler in order to realize a second resistance when the platelet tumbler is displaced. On the other hand, the radially inwardly directed second biasing direction serves to automatically engage the latch member in the latch receiving recess of the die tumbler when the platelet tumbler is in its unlocked position, thereby disengaging the blocking portion of the latch member from the latch blocking recess and the cylinder core in the cylinder housing can be turned. As already mentioned above, the platelet tumblers can be biased towards one another in opposite directions, ie in two opposite directions. Alternatively or additionally, the plurality of die tumblers are biased into the locking position by a respective tumbler biasing means, the latch member being biased to the release position by a latch biasing means, and wherein the tumbler biasing means and the latch receiving recess of the at least one platelet tumbler and the latch biassing means and the latching tip of the latch member are tuned thereto in that in a closed position of the cylinder core the platelet tumblers assume their respective locking position and the platelet tumbler or platelet tumblers, which comprise a latch engagement recess, thereby urge the locking element into the blocking position. In other words, in a home position of the cylinder lock, the tumbler biasing devices cause the platelet tumblers to assume their respective latching positions, due to the biasing action and the shape of the latch receiving recess of the respective platelet tumblers or platelet tumblers, contrary to its bias in FIG The blocking position is urged, Thus, in the basic position of the cylinder core is locked against rotation.

According to a further advantageous embodiment, each of the plurality of die tumblers has a key insertion opening, the outline of which has a first and a second coding portion. Tuned thereto, a key associated with the cylinder lock (in particular on a first side of a center plane) has a sequence of first cuts corresponding to the first coding sections of the plurality of die tumblers. Likewise, the key (especially on a second side of the midplane) has a series of second cuts corresponding to the second coding portions of the plurality of die tumblers. By this embodiment, the movement space in the keyway formed by the key insertion openings of the die tumblers is reduced for possible manipulation attempts against a simple, substantially rectangular execution of the keychain, i. the touching of the codings of the platelet tumblers is thereby made more difficult. Furthermore, from the above-explained Zweistufig speed of the key more locking variants, whereby the Nachschließsicherheit is increased in relation to a wrong key, since for each platelet locking the two coding sections would have to be queried correctly. Furthermore, there is a reduced likelihood that a key that is not associated with the cylinder lock can even be inserted into the keyway.

The invention will now be described by way of example only with reference to the drawings. shows a cylinder lock in an exploded view. shows the cylinder lock from the rear, wherein the cylinder core (Fig. 2b) from the cylinder housing (Fig. 2a) is removed. Fig. 3 shows the cylinder lock from the rear, wherein the cylinder core is inserted into the cylinder housing.

4 shows a perspective view of a group of wafer holders and a belt element guided by a holding plate.

Fig. 5 shows the holding plate and the locking element in another

Exploded view. FIGS. 6a and 6b show the cylinder lock in a locked state (FIG.

6a) and in an unlocked state (FIG. 6b), both of which represent a cross-sectional view of the cylinder lock. The structure of the cylinder lock shown will first be described with reference to FIG. 1. The lock has a cylinder housing 1 1 and a cylinder core 13 rotatable therein, wherein the cylinder housing 1 1 comprises tumbler blocking recesses 15, 15 'and a latch blocking recess 17. The cylinder core 13 has tumbler openings 19 for receiving platelet tumblers 21 on an upper side and a lower side (not shown). Further, on the cylinder core 13 laterally a bolt receiving opening 25 for receiving a locking element 27 and a holding plate receiving recess 29 for receiving a retaining plate 31 are provided. The cylinder lock can be opened and closed by means of an associated key 33, wherein the cylinder core 13 is rotatable about a rotation axis A. In Fig. 2b, the cylinder core 13 is shown with the inserted therein key 33, wherein the platelet tumblers 21, the holding plate 31 and the locking element 27 are received in the cylinder core 13. In Fig. 2a, the Zylinderge- housing 1 1 is shown, wherein the substantially circular cross-section of the inner circumferential surface of the cylinder housing 1 1 is interrupted by diametrically opposed Zuhaltungsblockiervertiefungen 15, 15 'and the offset by 90 ° arranged Riegelblockiervertiefung 17. In Fig. 3, the cylinder housing 1 1 is shown with the cylinder core 13 received therein, wherein the locking element 27 engages with a blocking portion 37 in the latch locking recess 17.

The die tumblers 21 are movable in the cylinder core 13 along a biasing direction Y shown in FIGS. 1 and 4 between a locking position and an unlocking position, with the platelet tumblers 21 being biased along the biasing direction Y by means of platelet tumblers 55, 55 'as shown in FIG , Groups of platelet tumblers 21 are biased in opposite directions in the embodiment shown, i. a group of platelet tumblers 21 is biased by means of platelet tumblers 55 in the biasing direction Y, so that in the locking position, the respective engaging portion 23 engages the tumbler locking recess 15 of the cylinder housing 11; another group of die tumblers 21 is biased against the biasing direction Y by means of die tumblers 55 'so that the respective engagement portion 23' engages the tumbler blocking recess 15 'of the cylinder housing 11. Each plate tumbler 21 is integrally formed and has a key insertion opening 63 (FIG. 4).

As shown in FIG. 4, the plate tumblers 21 have on an outer longitudinal side a respective latch receiving recess 47 provided for receiving a latch tip 35 of the latch member 27. Adjacent to the latch receiving recess 47 on both sides are latch engagement recesses 49a, 49a ', 49b and 49b', wherein the latch engagement recesses 49a and 49a 'are disposed in the biasing direction Y above the latch receiving recess 47, and the latch engagement recesses 49b and 49b' are disposed below the latch receiving recess 47 (opposite to the biasing direction Y shown). Further, an intermediate survey 51 a is provided between the latch receiving recess 47 and the latch latching recess 49a. In the same way, a intermediate elevation 51 b between the latch receiving recess 47 and the locking latch recess 49 b is provided. The latch engagement recesses 49a, 49a ', 49b and 49b' are designed for a latching engagement of the locking tip 35 of the locking element 27 when the respective plate tumbler 21 is offset relative to its unlocking position (FIG. 6b). The latch engagement recesses 49a, 49a ', 49b and 49b' are less deep than the latch receiving recess 47.

As shown in Fig. 5, the locking tip 35 of the locking element 27 and the blocking portion 37 of the locking element 27 are connected to each other by means of a connecting portion 39. The locking tip 35 has on its front side a groove 41, which fulfills the function of an intermediate recess 43. The locking element 27 is pretensioned in a prestressing direction X of the locking element 27 by means of a locking pretensioning device consisting of locking element springs 45, 45 '(FIG. 4), wherein the locking element springs 45, 45' extend between the locking tip 35 and the retaining plate 31 on both sides Connecting portion 39 are located (Fig. 5 and Fig. 1). The biasing direction X of the locking element 27 extends in the embodiment shown here perpendicular to the biasing direction Y of the platelet tumblers 21st Alternatively, however, the respective directions of movement and, correspondingly, the two pretensioning directions X, Y can also run obliquely relative to one another.

As shown in FIG. 4, the locking element 27 is guided through a bearing opening 53 of the retaining plate 31, wherein the blocking section 37 is located in the region of the retaining plate 31 lying radially outwards; the locking tip 35 of the locking element 27 is located at the other end in the radially inner region, ie within the cylinder core 13, wherein the outlines of the cylinder core 13, for the purpose of better visibility of the cylinder core 13 located in the parts are not shown in Fig. 4. Further, it is shown in FIG. 4 that the connecting portion 39 of the belt member 27 on one side 46a facing in an opening rotational direction O of the cylinder core 13 is not set back or less with respect to the blocking portion 37 of the latch member 27 than on another side 46b, which faces counter to the opening direction of rotation O of the cylinder core 13. In the exemplary embodiment shown here, the surface 46b is bevelled with respect to the planar surface 46a. The blocking portion 37 of the locking element 27 thus forms on the side 46b a lateral projection 65 which projects beyond the side 46b or bevelled surface 46b.

In a manipulation attempt in the form of picking, in which the cylinder core 13 is biased in the opening direction O (that is, when the cylinder core 13 with respect to the representation of FIG. 6a counterclockwise beyond the rotational position shown is moved), causes the lateral projection 65, that the locking element 27 remains in its blocking position, even if due to a successively "setting" all Platelet tumblers 21 in their unlocked position (corresponding to Fig. 6b) are located and thus the locking tip 35 of the locking element 27 is able to engage in the latch receiving recesses 47 of all platelet tumblers 21. Namely, in this state, the lateral projection 65 of the blocking portion 37 overlaps the outer circumference of the cylinder core 13 and the retaining plate 31, whereby the blocking portion 37 of the locking element 27 continues to engage the locking block recess 17 of the cylinder housing 11 and rotation of the cylinder core 13 about the rotational axis A. (Fig. 1) prevented.

Hereinafter, the operation of the cylinder lock shown will be explained mainly with reference to Figs. 6a and 6b. The cylinder core 13 is rotatable in the cylinder housing 1 1 only between a closed position and an open position. Fig. 6a shows the lock in a locked condition, which is first characterized in that at least one of the die tumblers 21 (in the home position of the cylinder lock: each of the platelet tumblers 21) is in the locking position. In the cross-sectional view shown in FIG. 6a, the plate tumbler 21 shown above engages with the engaging portion 23 in the tumbler locking recess 15, locking the cylinder core 13 with respect to rotation about the rotation axis A (FIG. 1) except for a small backlash is. Characterized in that the plate tumbler 21 is at least partially in the Verrieglungsposition, the locking element 27 is offset against the biasing direction X so that the blocking portion 37 of the locking element 27 engages the latch blocking recess 17 and the cylinder core 13, apart from an even smaller backlash, respect a rotation of the cylinder core 13 about the rotation axis A (Fig. 1) additionally blocked.

In order to better illustrate the particular mode of operation of the cylinder lock shown with regard to making it easier to detect the codes of the platelet tumblers 21, in the illustration according to FIG. 6a, the engaging portion 23 of the plate tumbler 21 shown above is not completely inserted into the tumbler blocking recess 15, ie this platelet tumbler 21 is located not completely in their locked position. The locking element 27, on the other hand, is in the illustration according to FIG. 6a in its blocking position. In the state shown, the locking tip 35 engages latching partially in the latch receiving recess 47 and partially in the locking latch recess 49b, and the intermediate elevation 51 b of the plate tumbler 21 engages in the intermediate recess 43 of the locking tip 35 a. On the other hand, when the engaging portion 23 of the respective plate tumbler 21 completely in the Zuhaltungsblockiervertiefung 15 is inserted, that is, if this plate tumbler 21 is completely in its Verrieglungsposition, then engages the locking tip 35 deviating from the representation of FIG. 6a only in the latch notches 49b, 49b ', but no longer in the latch receiving recess 47th

In Fig. 6b, the cylinder lock is shown in the open state. The opened state is initially characterized in that all platelet retainers 21 are in the unlocked position, i. None of the platelet tumblers 21 engages with the engagement sections 23, 23 'in the tumbler blocking recesses 15, 15' of the cylinder housing 11. In this complete unlocking position of the platelet tumblers 21, the locking tip 35 of the locking element 27 is completely received in the latch receiving recess 47 of the respective plate tumbler 21, whereby the blocking portion 37 of the locking element 27 no longer engages in the latch locking recess 17 of the cylinder housing 1 1, but in the bearing opening 53 of Holding plate 31 is received. The locking element 27 is accordingly in its release position. If, therefore, all platelet tumblers 21 are in their unlocking position and, as a result, the locking element 27 is also in its release position, the cylinder core 13 can be rotated freely about the axis of rotation A (FIG. 1).

In order to move all platelet tumblers 21 into their unlocking position, the key 33 is inserted into the keyway of the cylinder lock, which is formed by the key insertion openings 63 (FIGS. 1 and 4) of the platelet tumblers 21 which are in alignment with one another. The outline of the respective key insertion opening 63 has a first coding section 59a and a second coding section 59b (FIG. 4). Accordingly, the key 33 on a first side of a central plane has a series of first cuts 61 a, 61 a '(FIG. 1) which correspond to the first coding sections 59 a of the die tumblers 21. On a second side of the middle plane has the key 33 a sequence of second cuts 61 b, 61 b ', which correspond to the second coding sections 59 b of the plate tumblers 21. During insertion of the key 33 into the keyway, the notches 61a, 61a ', 61b, 61b' slide along the coding portions 59a, 59b of the platelet tumblers 21, thereby displacing the platelet tumblers 21 out of the locking position against their respective bias. In this case, the locking tip 35 of the locking element 27 slides along the longitudinal side of the respective plate tumbler 21 and engages in a latching manner successively only in the latch engagement depressions 49b, 49b '(or 49a, 49a') and finally in the latch receiving recess 47.

If, in the cylinder lock shown, it is attempted to feel the offset path traveled by the respective die tumbler 21 between the locking position and the unlocking position according to the method of detecting the codes, a considerable difficulty is that due to the latching engagement between the locking tip 35 (Including the intermediate recess 42) and the latch locking recesses 49 a, 49 a ', 49 b, 49 b' and the intermediate elevations 51 a, 51 b along a wide displacement range several noticeable changes in the resistance to movement can occur. Thus, it can not or only with great difficulty be determined in which position of the manipulatively offset plate tumbler 21 the unlocking position is actually reached, in which the latch tip 35 engages in the latch receiving recess 47. Thus, a high security against a Nachschließen is achieved. In total, based on a rotational actuation of the cylinder core 13, in Fig. 6a three specific Verdrehspiele: A first torsional backlash exists between the blocking portion 37 of the locking element 27 and the latch locking recess 17 of the cylinder housing 1 1, a second torsional backlash exists between the connecting portion 39 of the locking element 27th and the bearing opening 53 of the holding plate 31, and a third torsional backlash exists between the engagement abutment 23 of the at least one plate tumbler 21 and the Zuhaltungsblokierieriefiefung 15 of the cylinder housing 1 first The first backlash is chosen lower than the second backlash, and the second backlash is chosen lower than the third backlash. As a result, the locking element 27 can easily tilt or tilt when a torque in the opening direction of rotation is exerted on the cylinder core 13, while the blocking portion 37 of the locking element 27 in the latch locking recess 17 of the cylinder housing

1 l engages. Thus, associating the sensed resistance to movement to a particular position of the plate tumbler 21 becomes even more difficult.

LIST OF REFERENCE NUMBERS

1 1 cylinder housing

13 cylinder core

15, 15 'tumbler blocking recesses

17 latch blocking recess

19 tumbler openings

21 platelet tumblers

23, 23 'engaging portion

25 bolt receiving opening

27 locking element

29 holding plate receiving recess

31 retaining plate

33 keys

35 bar top

37 blocking section

39 connecting section

41 groove

43 Intermediate pit

45, 45 'locking element springs

46a, 46b pages

47 Bolt receiving recess

49a, 49a ', 49b, 49b' latch engagement recesses

51 a, 51 b Intermediate surveys

53 bearing opening

55, 55 'plate tumbler springs

59a first coding section

59b second coding section

61 a, 61 a 'first cuts

61 b, 61 b 'second cuts 63 key insertion opening

65 lateral projection

A rotation axis

Y biasing direction of the platelet tumblers X biasing direction of the locking element

O Opening direction of the cylinder core

Claims

claims

Cylinder lock, with a cylinder housing (1 1) and a cylindrical housing (1 1) rotatably mounted in the cylinder core (13);

wherein the cylinder housing (11) has at least one tumbler blocking recess (15, 15 ') and one bolt locking recess (17);

wherein a plurality of die tumblers (21) are provided in the cylinder core (13), each of the plurality of die tumblers (21) having an engaging portion (23, 23 ') and movable between a locking position and an unlocking position, the engaging portion (23, 23') being movable engages the tumbler blocking recess (15, 15 ') of the cylinder housing (11) in the locking position and is disengaged from the tumbler locking recess (15, 15') in the unlocking position, and at least one of the plurality of platelet tumblers (21) comprises a latch receiving recess (15). 47);

the cylinder lock further comprising a latch member (27) having a latch tip (35) and a blocking portion (37), the latch member (27) being movable between a blocking position and a release position and biased to the release position, wherein in the blocking position the blocking portion (37) engages with the latch locking recess (17) of the cylinder housing (11), and wherein in the release position the latch tip (35) engages the latch receiving recess (47) of the at least one latch tumbler (21) and the blocking portion (37) except Engaged with the latch locking recess (17) of the cylinder housing (1 1) is brought;

characterized , in that the at least one plate tumbler (21) adjacent to the latch receiving recess (47) has at least one latch engagement recess (49a, 49a ', 49b, 49b') in which the latch tip (35) of the latch element (27) engages in a latching manner at least one plate tumbler (21) is offset from the unlocked position by a first path length, wherein the latch latch recess (49a, 49a ', 49b, 49b') is less deep than the latch receiving recess (47) of the plate tumbler (21).

Cylinder lock according to claim 1,

wherein the at least one plate tumbler (21) adjacent to the latch receiving recess (47) comprises a plurality of juxtaposed latch engagement recesses (49a, 49a ', 49b, 49b').

Cylinder lock according to claim 1 or 2,

wherein the at least one plate tumbler (21) has on both sides of the latch receiving recess (47) at least one latch engagement recess (49a, 49a ', 49b, 49b').

Cylinder lock according to one of the preceding claims,

wherein the at least one plate tumbler (21) on both sides of the latch receiving recess (47) each have a plurality of juxtaposed latch engagement recesses (49a, 49a ', 49b, 49b').

Cylinder lock according to one of the preceding claims,

wherein the latch receiving recess (47) is provided with respect to the direction of movement of the at least one plate tumbler (21) at a side edge of the at least one plate tumbler (21).

6. Cylinder lock according to one of the preceding claims,

wherein the latch receiving recess (47) and the at least one latch engagement recess (49a, 49a ', 49b, 49b') are substantially triangular in shape.

7. Cylinder lock according to one of the preceding claims,

wherein the at least one plate tumbler (21) between the latch receiving recess (47) and the at least one latch notch (49a, 49a ', 49b, 49b') has an intermediate elevation (51a, 51b), wherein the latch tip (35) has an intermediate recess (47). 43), and wherein the intermediate elevation (51 a, 51 b) of the at least one plate tumbler (21) is adapted to engage in the intermediate recess (43) of the locking tip (35) when the at least one plate tumbler (21) from the unlocked position is offset by a second path length which is less than the first path length.

8. Cylinder lock according to claim 7,

wherein the intermediate recess (43) of the locking tip (35) is formed as a groove (41) extending parallel to the axis of rotation (A) of the cylinder core (13).

9. Cylinder lock according to one of the preceding claims,

wherein the latch member (27) between the latch tip (35) and the blocking portion (37) has a connection portion (39) narrower than the blocking portion (37) of the cylinder core (13) with respect to a tangential direction about the rotation axis (A) of the cylinder core (13) Locking element (27).

10. cylinder lock according to claim 9,

wherein the connecting portion (39) of the locking member (27) on a side (46a) which in an opening rotational direction (O) of the cylinder core (13) has, with respect to the blocking portion (37) of the locking element (27) is not set back or less far than on another side (46 b), which faces against the opening direction (O) of the cylinder core (13).

Cylinder lock according to claim 10,

wherein the connecting portion (39) of the locking element (27) on one side (46a) is flush with the blocking portion (37) of the locking element (27) and on the other side (46b) with respect to the blocking portion (37) of the locking element (27) is set back so that a lateral projection (65) is formed.

Cylinder lock according to one of claims 9 to 11,

wherein the latch member (27) is associated with a support plate (31) having a bearing hole (53), wherein the connecting portion (39) of the latch member (27) penetrates the bearing hole (53) when the latch member (27) is in the lock position is,

wherein, when the at least one blade tumbler (21) is in the locking position and the latch member (27) is in the blocking position, a first backlash between the blocking portion (37) of the latch member (27) relative to a rotational operation of the cylinder core (13) and the bolt locking recess (17) of the cylinder housing (1 1), a second torsional backlash between the connecting portion (39) of the locking element (27) and the bearing opening (53) of the associated holding plate (31) and a third torsional backlash between the engaging portion (23 , 23 ') which comprises at least one plate tumbler (21) and the tumbler blocking recess (15, 15') of the cylinder housing (11), and

wherein the first backlash is less than the second backlash, and the second backlash is less than the third backlash.

13. Cylinder lock according to one of the preceding claims, wherein between the cylinder core (13) and the cylinder housing (1 1) a holding plate (31) is arranged, wherein a said locking element (27) associated latch biasing means (45, 45 ') between the holding plate (31) and the locking element (27) is supported.

14. Cylinder lock according to one of the preceding claims,

wherein each platelet cage (21) of a group comprising some or all of the plurality of platelet tumblers (21) comprises a latch receiving recess (47) and at least one latch engagement recess (49a, 49a ', 49b, 49b'), the latch member (27) extending along the axis of rotation (A) of the cylinder core (13), and wherein in the release position of the locking element (27) engages the locking tip (35) in the latch receiving recesses (47) of the group of Flättzezuhaltungen (21).

15. Cylinder lock according to one of the preceding claims,

wherein the plurality of die tumblers (21) are biased to the latching position along a first biasing direction (Y), wherein the latch member (27) is biased to the release position along a second biasing direction (X), and wherein the first biasing direction (Y) and the second biasing direction (Y) Biasing direction (X) obliquely or perpendicular to each other.

16. Cylinder lock according to one of the preceding claims,

wherein the plurality of die tumblers (21) are biased into the latching position by means of respective latch biasing means (55, 55 '), wherein the latch member (27) is biased to the release position by latch biasing means (45, 45'), and wherein the latch - holding biasing means (55, 55 ') and the latch receiving recess (47) of the at least one plate tumbler (21) and the bolt Vor- tensioning means (45, 45 ') and the locking tip (35) of the locking element (27) are adapted to the fact that in a closed position of the cylinder core (13), the plurality of platelet tumblers (21) occupy the locking position and the at least one platelet lock (21) thereby Locking element (27) urges in the blocking position.

17. Cylinder lock according to one of the preceding claims,

wherein each of the plurality of plate tumblers (21) has a key insertion opening (63) whose outline has a first (59a) and a second coding section (59b), a key (33) associated with the cylinder lock being a series of first cuts (61a, 61st) a ') corresponding to the first coding portions (59a) of the plurality of plate tumblers (21), and a series of second cuts (61b, 61b') corresponding to the second coding portions (59b) of the plurality of plate tumblers (21) ,