EP2410110B1 - Locking cylinder, in particular double locking cylinder with free-running locking element - Google Patents

Description

The invention relates to a lock cylinder, in particular a equipped with a free-running closing member double lock cylinder with a housing, a rotatably mounted in a bearing cavity of the housing cylinder core, which by means of a displaceable when inserting a key in a keyway of the cylinder core of the key tip in a coupling position coupling member the closure member can be coupled, in which coupling position engages a coupling projection of the coupling member in a coupling recess associated therewith of the closing member, wherein the coupling member exits when the key is removed by applying a torque to the closing member from the coupling position.

This is required, for example, emergency opening doors with Getriebeeinsteckschloss, which must be uncoupled under all conditions without tampering when occurring radial load on the closing member. Such lock cylinders are used in gear locks especially in escape route doors.

The lock cylinder according to the invention particularly relates to a double lock cylinder, as he from the DE 10 2009 038 229 A1 is already known. The lock cylinder described therein has a two-part housing, wherein each housing half forms a bearing cavity in which a cylinder core is rotatably mounted. If the key is not inserted, the cylinder core is locked in rotation by means of tumbler pins. These are displaced by insertion of a suitable key in a release position, so that the rotational lock of the cylinder core is released and the cylinder core can be rotated. At the slot of the key into the keyway of the cylinder core, the tip of the key acts on a coupling member having coupling projections which can enter into coupling recesses of the closure member by sliding the coupling member towards a closure member to rotationally couple the closure member to the cylinder core to engage in rotation of the cylinder core Cylinder core is dragged. To ensure that after deduction of the key, the coupling member emerges from its coupling position again, so that the closing member can rotate freely, the coupling member is spring-loaded in the direction of the cylinder core. In the event that the force of this spring is not sufficient to herausververlagern the coupling member from the coupling position, a control pin engages in a control recess with inclined edges. If a torque is applied to the coupling member via the closing member, then the control pin can slide along the inclined edge and controls the closing member from its coupling position.

The publication DE 36 30 602 A1 shows a cam and two gears. These teeth are formed with the slopes below 30 °, generating the tip of the teeth, so that the teeth come into the teeth regardless of the position of the gears and the beard. Between the forks of the gears, two springs with the left and right windings are placed one inside the other, so that each gear goes out of the toothing with the beard. And only under key pressure both gears come with the beard in the teeth or alternately comes every gear with the beard in the teeth.

The invention is based on the object to improve a lock cylinder with simple means closing technology.

The object is achieved by the invention specified in the claims. First and foremost, a helical flank control of the torque transmission flanks adjacent to one another in the coupling position is provided in order to displace the coupling member from the coupling position when the key is pressed against the torque when the key is removed. Either the coupling projection or the coupling recess or both have torque transmitting flanks forming an inclined surface. If a torque is applied to this inclined surface, then arises a force directed in the axial direction in the direction away from the closing member, which displaces the coupling member out of the coupling position.

A development of the invention, which has an independent character, provides that the coupling member is floatingly mounted in a bearing cavity of the cylinder core. According to this embodiment, it is possible to dispense with the return spring provided in the prior art, which displaces the coupling member from the coupling position.

Regardless of whether the coupling member is floating or urged by a spring force in the disengaged position, it is advantageous if the torque-transmitting flanks of torque transmission surfaces are formed. These are in the coupling position in area investment together. The torque transmission surfaces can form gradient surfaces. The pitch surfaces have a pitch angle that cause no self-locking of the axially displaceable coupling elements. The torque transmission surfaces are preferably formed by worm thread pitch surfaces. It can be provided from a facing the closing member end face of the coupling member projecting, extending on different circular arc sections coupling projections. These, eccentrically with respect to the axis of rotation of the cylinder core or the coupling member arranged coupling projections can dive only in a single rotational position in you individually associated coupling recesses of the closing member. The pointing in the circumferential direction side surfaces of the coupling projections then extend on worm thread pitch surfaces. The side surfaces of the arcuate coupling recesses also extend on Schneckengangsteigungsflächen. This results in a thread-like engagement of the two torque transmission edges, wherein the thread pitch is so large that a torque applied to the closing member torque can be converted via a slant edge control in an axial force that drives the coupling member from the coupling position out. The coupling member may be divided into two parts. It may have a first coupling element, which is coupled rotationally fixed and axially displaceable with the cylinder core. For this purpose, the first coupling element can have one or two radially projecting ribs which lie in corresponding axial slots of the cylinder core. The first coupling element may have a cup-like receiving cavity, the opening of which is directed towards the closing member. In this Aufnahmehöhlung a second coupling element is mounted, which has the coupling projection or preferably the two coupling projections. Between the first coupling element and the second coupling element, a compression spring is provided which unfolds a spring force, with which the two coupling element are spread apart in the axial direction. There are Fesselungselemente provided in the form of pins to tie the second coupling element in the Aufnahmehöhlung. The pins pass through holes in the pot wall of the first coupling element and engage in peripheral recesses of the second coupling element. The spring is supported on the one hand on the bottom of the pot and on the other hand in an end-side annular cavity of the second coupling element. From the bottom or the frontal cavity centering can go out, which protrude into the compression spring. Is the insertion of the key, the coupling recess of the closing member is not in an alignment with the coupling projection, the first coupling element can nevertheless be displaced axially from the key tip. Since the coupling projection of the second coupling element can not enter into its associated Kupplungsausnehmung, the second coupling element can not be mitverlagert. This leads to a compression of the Feather. If the key is completely inserted into the keyway and the tumbler pins are displaced into their release position, the cylinder core can be rotated until the coupling projection reaches its escape position to the coupling recess. The tensioned spring then displaces the second coupling element in the coupling position. In order to avoid that a torque transmission from the cylinder core leads to the closing member to a relative displacement of the second coupling element relative to the first coupling element blocking elements are provided which block each relative displacement to each other with a slight relative rotation of the two coupling elements. This has the consequence that in this relative displacement, the second coupling element can no longer move relative to the first coupling element.

The lock cylinder according to the invention has tumbler pins, which cooperates with mounted on the key broad side of the key Codungsmulden. The key is a reversible flat key. Furthermore, the manipulation of the closing member is made more difficult, since the bearing cavity of the cylinder core is filled with the diametrical wall slots through the closed surface of the first coupling member. The acted upon by the key tip end face of the lock cylinder is preferably a plane surface. It is designed so that the opening of the keyway is opened in the direction of the closing member of the coupling element.

Fig. 1

eine perspektivische Darstellung des Schließzylinders mit eingestecktem Schlüssel,

Fig. 2

eine Explosionsdarstellung der wesentlichen Elemente des Schließzylinders, wobei die Zuhaltungsstifte der Übersichtlichkeit weggelassen sind,

Fig. 3

eine perspektivische Darstellung des Schließgliedes,

Fig. 4

eine perspektivische Darstellung eines ersten Kupplungselementes,

Fig. 5

eine erste perspektivische Darstellung eines zweiten Kupplungselements,

Fig. 6

eine zweite perspektivische Darstellung des zweiten Kupplungselementes,

Fig. 7

einen Längsschnitt durch den in der Figur 1 dargestellten Schließzylinder jedoch ohne in den Schlüsselkanal eingesteckten Schlüssel,

Fig. 8

einen Schnitt gemäß der Linie VIII - VIII in Figur 7,

Fig. 9

einen Schnitt gemäß der Linie IX - IX in Figur 7,

Fig. 10

eine perspektivische Darstellung des aus den beiden Kupplungselementen 7, 8 ausgebildeten Kupplungsgliedes,

Fig. 11

eine Draufsicht auf das Kupplungsglied,

Fig. 12

eine perspektivische längsgeschnittene Darstellung der Kupplungsglieder und des Schließgliedes, wobei das zweite Kupplungselement des linken Kupplungsgliedes sich in Kupplungseingriff mit dem Schließglied befindet,

Fig. 13

eine Darstellung gemäß Figur 12, wobei zufolge eines auf das Schließglied 6 aufgebrachten Drehmomentes das zweite Kupplungselement 8 gegenüber dem ersten Kupplungselement 7 geringfügig verdreht ist, so dass die Blockierelemente 15, 17 in Wirkung getreten sind,

Fig. 14

einen Schnitt gemäß Figur 8 jedoch in der Verdrehtstellung der beiden Kupplungselemente 7, 8 gemäß Figur 13,

Fig. 15

eine Darstellung gemäß Figur 10 in der Verdrehtstellung der beiden Kupplungselemente 7, 8,

Fig. 16

eine Darstellung gemäß Figur 11 jedoch in der Verdrehtstellung der beiden Kupplungselemente 7, 8,

Fig. 17

eine Darstellung gemäß Figur 7 mit in den Schlüsselkanal 4 des linken Zylinderkernes 3 eingeschobenen Schlüssel 5 jedoch mit in Verdrehtstellung stehendem Schließglied 6, so dass die Kupplungsvorsprünge 9, 9' des zweiten Kupplungselementes 8 nicht in die ihnen zugeordneten Kupplungsausnehmungen 11, 11' des Schließgliedes eintreten können,

Fig. 18

eine perspektivische Darstellung der Kupplungsglieder und des Schließgliedes in der in Figur 17 dargestellten Betriebsstellung,

Fig. 19

ein zweites Ausführungsbeispiel der Erfindung in einer Darstellung gemäß Fig. 3,

Fig. 20

das zweite Ausführungsbeispiel in einer Darstellung gemäß Fig. 5,

Fig. 21

das zweite Ausführungsbeispiel in einer Darstellung gemäß Fig. 6,

Fig. 22

ein drittes Ausführungsbeispiel in einer Darstellung gemäß Fig. 3,

Fig. 23

das dritte Ausführungsbeispiel in einer Darstellung gemäß Fig. 5,

Fig. 24

das dritte Ausführungsbeispiel in einer Darstellung gemäß Fig. 6,

Fig. 25

ein viertes Ausführungsbeispiel in einer Darstellung gemäß Fig. 3,

Fig. 26

das vierte Ausführungsbeispiel in einer Darstellung gemäß Fig. 5,

Fig. 27

das vierte Ausführungsbeispiel in einer Darstellung gemäß Fig. 6,

Fig. 28

ein fünftes Ausführungsbeispiel in einer Darstellung gemäß Fig. 3,

Fig. 29

das fünfte Ausführungsbeispiel in einer Darstellung gemäß Fig. 5,

Fig. 30

das fünfte Ausführungsbeispiel in einer Darstellung gemäß Fig. 6

Embodiments of the invention are explained below with reference to accompanying drawings. Show it:

Fig. 1

a perspective view of the lock cylinder with inserted key,

Fig. 2

an exploded view of the essential elements of the lock cylinder, the tumbler pins are omitted for clarity,

Fig. 3

a perspective view of the closing member,

Fig. 4

a perspective view of a first coupling element,

Fig. 5

a first perspective view of a second coupling element,

Fig. 6

a second perspective view of the second coupling element,

Fig. 7

a longitudinal section through the in the FIG. 1 Lock cylinder shown, however, without key inserted in the keyway,

Fig. 8

a section along the line VIII - VIII in FIG. 7 .

Fig. 9

a section along the line IX - IX in FIG. 7 .

Fig. 10

a perspective view of the formed from the two coupling elements 7, 8 coupling member,

Fig. 11

a top view of the coupling member,

Fig. 12

a perspective longitudinal sectional view of the coupling members and the closing member, wherein the second coupling element of the left coupling member is in coupling engagement with the closing member,

Fig. 13

a representation according to FIG. 12 in which, according to a torque applied to the closure member 6, the second coupling element 8 is slightly rotated relative to the first coupling element 7, so that the blocking elements 15, 17 have come into effect,

Fig. 14

a section according to FIG. 8 However, in the twisted position of the two coupling elements 7, 8 according to FIG. 13 .

Fig. 15

a representation according to FIG. 10 in the rotated position of the two coupling elements 7, 8,

Fig. 16

a representation according to FIG. 11 However, in the twisted position of the two coupling elements 7, 8,

Fig. 17

a representation according to FIG. 7 with inserted into the keyway 4 of the left cylinder core 3 key 5, however, with in a turned position closing member 6, so that the coupling projections 9, 9 'of the second coupling element 8 can not enter their associated coupling recesses 11, 11' of the closing member,

Fig. 18

a perspective view of the coupling members and the closing member in the in FIG. 17 shown operating position,

Fig. 19

A second embodiment of the invention in a representation according to Fig. 3 .

Fig. 20

the second embodiment in a representation according to Fig. 5 .

Fig. 21

the second embodiment in a representation according to Fig. 6 .

Fig. 22

a third embodiment in a representation according to Fig. 3 .

Fig. 23

the third embodiment in a representation according to Fig. 5 .

Fig. 24

the third embodiment in a representation according to Fig. 6 .

Fig. 25

a fourth embodiment in a representation according to Fig. 3 .

Fig. 26

the fourth embodiment in a representation according to Fig. 5 .

Fig. 27

the fourth embodiment in a representation according to Fig. 6 .

Fig. 28

a fifth embodiment in a representation according to Fig. 3 .

Fig. 29

the fifth embodiment in a representation according to Fig. 5 .

Fig. 30

the fifth embodiment in a representation according to Fig. 6

The lock cylinder shown in the drawings consists of two cylinder housing halves 1, which are connected together by a connecting web 29 to a one-piece housing. The axial length of the housing can be changed by one or more extension pieces 27. The use of the individual housing elements 1, 27, 29 takes place by means of fastening screws 30.

Each of the two cylinder housing halves 1 forms a bearing cavity 2. The two storage cavities 2 are aligned. Between the bearing cavities 2 of the two cylinder housing halves 1 is a closing member 6, which is rotatable. In the two storage cavities 2 stuck cylinder cores 3, which are held there by retaining rings 28. This cylinder core 3 has a key channel 4 for inserting a key. 5

From the into the FIGS. 7 and 17 shown longitudinal sections are core holes and housing bores recognizable, in which not shown tumbler pins einliegen that can be sorted by Breitseitenausnehmungen of inserted into the keyway 4 Wendeflachschlüssels 5 in a release position, so that the cylinder core 3 can be rotated by the appropriate key. When the key is removed, the tumbler pins lock the rotatability of the cylinder core 3.

The cylinder core 3 has in the region of an end facing the closing member 6 a bearing cavity 26 for receiving a first coupling element 7. The bearing cavity 26 has diametral wall slots 25, engage in the radially projecting, different width ribs 24 of the first coupling member 7. The coupling element 7 is characterized rotationally fixed and radially bearing-oriented but axially displaceable tied to the cylinder core 3.

The first coupling element 7 forms together with a second coupling element 8, a coupling member to the cylinder core 3 against rotation of the To lock closing member 6 so that the closing member 6 can be dragged in a key-operated rotation of the cylinder core 3.

The first coupling element 7 has a cup-shaped receiving cavity, in which the second coupling element 8 is receiving. From the bottom of the receiving cavity 14 projects from a centering pin 20 which is a centering pin 23 of a Stirnseitenringausnehmung the second coupling element 8 opposite. On the two pins 22, 23 is inserted in each case one end of a compression spring 13, with which the two coupling elements 7, 8 are acted upon each other away.

In the region of the rib 24, the wall of the recess 14 has two opposing bores 21, in which tethering pins stuck 20 which enter into Fesselungsausnehmungen 19 of the outer edge of the second coupling element 8 to tie the two coupling elements 7, 8 to each other.

In the region of the wall of the receiving cavity 14 is a beveled blocking stage 15. The blocking stage 15 is flanked by two angular edges 16. In the in the FIGS. 8 to 12 shown operating positions extends a transition edge of a flat edge 18 to the end edge 17 of the second coupling element 8 parallel to the extension direction of the blocking stage 15. In this operating position, the two angular edges are spaced from the flat side edge 18. If an axial force is applied to the second coupling element 8 in the direction of the first coupling element 7 in this position, the second coupling element 8 can dip into the receiving cavity 14. The planar flank 18 slides along the blocking stage 15. The spring 13 is compressed. It can be in the Figures 17 and 18 left illustrated operating position of the two coupling elements 7, 8 formed coupling member can be achieved.

If, however, the second coupling element 8 is slightly rotated relative to the first coupling element 7, as in the FIGS. 13 to 16 A portion of the end edge 17 is now on the blocking stage 15, so that with permanent maintenance of a torque both coupling elements 7, 8 are tied together such that a Relative displacement of the two coupling elements 7, 8 is not possible.

The FIGS. 5 and 6 It can be seen that the second coupling element 8 has two from its facing the closing member 6 end face projecting coupling projections 9, 9 '.

Of the FIG. 11 It can be seen that the two coupling projections 9, 9 'each extend on a circular arc, wherein the radii of the two circular arcs differ from each other. The two mutually opposite coupling projections 9, 9 'have narrow side flanks 10,10' which point in the circumferential direction of rotation and correspond to pitch surfaces with a large thread pitch. These narrow side surfaces 10, 10 'form torque transmission edges. The exemplary embodiment involves area-like torque-transmitting flanks 10, 10 ', which rest in a coupling position on corresponding torque transmission surfaces 12, 12', which are formed by the narrow side surfaces of arcuate coupling recesses 11, 11 'of the closing member 6.

The torque transmitting surfaces 12, 12 ', 9, 9' are designed so that a torque which is exerted by the closing member 6 on the second coupling element 8, exerts an axial force on the second coupling element 8. When not keyed into the key channel 4 key floating in the bearing cavity 26 mounted, formed by the two coupling elements 7, 8 coupling member in the radial direction, so that the coupling projections 9, 9 'from their associated coupling recesses 11, 11' of the closing member. 6 escape. There is a decoupling instead.

On the other hand, if a key 5 is inserted in the key channel 4, the plane end face 7 'of the first coupling element 7 is acted on by the key tip 5'. If a torque is now exerted on the closing element 6, an axial force likewise acts on the second coupling element 8. The torque exerted simultaneously on the second coupling element 8, however, leads to the above with reference to FIG FIGS. 13 to 16 described relative rotation of the two coupling elements 7, 8 to each other and the concomitant blocking of the relative axial displaceability of the two coupling elements 7, 8th

However, this relative Axialverlagerbarkeit is possible if twisted closure member 6, as it FIG. 17 shows, the key 5 is inserted into the keyway. The coupling projections 9, 9 'can then not enter their associated coupling recesses 11, 11'. Rather, they encounter with their end faces against the central wall of the closing member 6, which forms the coupling recesses 11, 11 '. The peripheral edge of the end edge 17, which coincides with the edge of the planar edge 18, can now slide on the blocking stage 15, since no torque is exerted on the second coupling element 8. The second coupling element 8 can be rotate with respect to the first coupling element 7 from the blocking position. At the further insertion of the key 5 into the in FIG. 17 shown end position immerses the second coupling element 8 in the receiving cavity 14 of the first coupling element 7 a.

For the axial displacement and for the slight rotational displacement has the recess 19, in which the pin 20 enters a sufficient range of movement in the circumferential direction and in the axial direction.

The operation of the lock cylinder is the following: Starting from the in FIG. 7 shown operating position in which the coupling projections 9, 9 'of both coupling members 7, 8 are in alignment with the coupling recesses 11, 11' of the closing member 6 in the keyway 4 of the right cylinder core 3 inserted a matching key, so his key tip 5 'by attack on the flat surface 7 'of the first coupling element 8, the entire coupling member 7, 8 relocate such that the coupling projections 9, 9' in their associated coupling recesses 11, 11 'occur.

The left cylinder core associated coupling member 7, 8 has an arbitrary operating state. In the in FIG. 7 shown position engage the coupling projections 9, 9 'in the coupling recess 11, 11' of the closing member 6 a. Since no key is inserted into the left cylinder core 3, the floating in the bearing opening 26 mounted coupling member 7, 8 is axially displaceable. Now, if the inserted into the right cylinder core 3 key is rotated, the torque transmission surfaces 10, 10 ', 12, 12' of the left coupling member 7, 8 slide against each other. As a result of the helical course of the torque transmission surfaces 10, 10 ', 12, 12', an axial force is exerted on the left-hand coupling member 7, 8 away from the closing member 6, then in that the coupling projections 9, 9 'slide out of the coupling recesses 11, 11'.

The coupling projections 9, 9 'of the right coupling member 7, 8, however, can not escape from the coupling recesses 11, 11', because the key inserted there locks a Axialverlagerbarkeit the first coupling element 7 and the second coupling element 8 according to the applied torque with respect to the first coupling element. 7 is motion blocked.

Stand the coupling projections 9, 9 'when inserting the key 5 in the keyway 4 is not in alignment with their associated coupling recesses 11, 11', as shown in the FIG. 17 is shown, the coupling member 7, 8 is compressed, in which the second coupling element 8 is hineinverlagert into the first coupling element 7. In a subsequent rotation of the cylinder core 3 are the mutually associated coupling projections 9, 9 'and coupling recesses 11, 11'. The relaxing spring 13 then drives the coupling projections 9, 9 'in the coupling recesses 11, 11'.

In the in the FIGS. 19 to 21 illustrated second embodiment, the coupling projections 9 are formed by radially projecting from a central portion 17 of the second coupling element 8 pin. The torque transmission surfaces 10 are formed by the outer surface of the pins extending on a cylinder jacket surface.

The closing member 6 has a form-fitting coupling recess 11 with a central portion 28 into which the central portion 27 can enter. From This central section is a total of four coupling recesses 11, each forming torque transmitting surfaces 12. The torque transmission surfaces 12 are the well surfaces of a trough-shaped trough.

To ensure that the coupling element 8 can enter the coupling position only in a single rotational position, the individual coupling projections 9 have different diameters or lengths. The coupling recesses 11 also have different diameters and lengths.

In the in the FIGS. 22 to 24 illustrated embodiment, the coupling projection 9 also has a central portion 27. In this embodiment, the coupling projection 9 extends in a semicircle around the central portion 27 and forms two oblique torque transmitting surfaces 10 from.

The recess corresponding to the coupling projection 9 of the closing member 6 also forms a central portion 28, in which the central portion 27 can occur. The central portion 28 is flanked by an approximately semicircular coupling recess 11, the walls of which form oblique torque transmission surfaces 12.

In the in the FIGS. 25 to 27 illustrated fourth embodiment, a central portion 27 is also provided in the form of a cylinder pin on the second coupling element 8, projecting from the jacket wall cosmic coupling projections 9 in the radial direction. There are provided roof-like torque transmitting surfaces 10 to each other.

The roof-like torque transmission surfaces 10 of the coupling projections 9 enter into corresponding coupling recesses 11 of the closing member 6, which lie relative to a central portion 28 diametrically opposite.

Again, the coupling projections 9 have a different shape, so that the second coupling element 8 can couple only in a single rotational position with the closing member 6.

In the in the FIGS. 28 to 30 shown fifth embodiment projects from a cylindrical central portion 27 of the second coupling element 8 only a cylindrical extension radially from. This coupling projection 9 has a cylinder jacket surface 10 which forms the torque transmission surface.

The closing member 6 has a corresponding to the central portion 27 cavity. From this central portion 28 of the cavity goes from a coupling recess 11, the curved torque transmission surfaces 12 forms.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize in their optional sibling version independent inventive development of the prior art, in particular to make on the basis of these claims divisional applications.

LIST OF REFERENCE NUMBERS

1 Cylinder housing half 2 bearing cavity 3 cylinder core 4 keyway 5 key 5 ' key tip 6 closing member 7 first coupling element 7 ' face 8th second coupling element 9 coupling projection 9 ' coupling projection 10 Torque transmitting face 10 ' Torque transmitting face 11 coupling recess 11 ' coupling recess 12 Torque transmitting face 13 feather 14 receiving cavity 15 blocking stage 16 angle edge 17 end edge 18 plan flank 19 recess 20 pen 21 drilling 22 spigot 23 spigot 24 rib 25 slot 26 bearing cavity 27 extension 28 bracket 29 connecting web 30 mounting screws

Claims (10)

1. Lock cylinder, in particular a double lock cylinder equipped with a free-running lock element, having a housing (1), having a cylinder core (3) rotatably mounted in a bearing cavity (2) of the housing (1), which cylinder core is couplable to the lock element (6) by means of a coupling element which, when a key (5) is inserted into a key channel (4) of the cylinder core (3), is displaceable into a coupling position by the key tip (5'), in which coupling position a coupling projection (9) of the coupling element (7, 8) engages into a coupling recess (11), assigned thereto, of the lock element (6), wherein, when the key (5) has been pulled out, the coupling element (7, 8) moves out of the coupling position as a result of exertion of a torque on the lock element (6), characterized by oblique-flank drive of the torque transmission flanks (10, 12), which bear against one another in the coupling position, of coupling projection (9) and/or coupling recess (11) for the movement out of the coupling position.
2. Lock cylinder according to Claim 1, characterized in that the coupling element (7, 8) is mounted in floating fashion in a bearing cavity (26) of the cylinder core (3).
3. Lock cylinder according to one or more of the preceding claims, characterized in that the the torque transmission flanks (10, 12) which are in areal contact in the coupling position extend on a screw-flight sloping surface.
4. Lock cylinder according to one or more of the preceding claims, characterized by two coupling projections (9, 9') which project from a face surface, pointing toward the lock element (6), of the coupling element (7, 8) and which extend on different circular arc sections.
5. Lock cylinder according to one or more of the preceding claims, characterized in that the coupling element has a first coupling element (7), which is coupled rotationally conjointly and axially displaceably to the cylinder core (3), and a second coupling element (8), which has the coupling projection (9, 9') and which is displaceable relative to the first coupling element (7) counter to the restoring force of a spring (13).
6. Lock cylinder according to one or more of the preceding claims, characterized by blocking elements (15, 17) which, as a result of a relative rotation of the two coupling elements (7, 8) with respect to one another, block the displaceability of the second coupling element (8) relative to the first coupling element (7).
7. Lock cylinder according to one or more of the preceding claims, characterized in that the blocking elements are formed by an in particular oblique step (15) of a receiving cavity (14) of the first coupling element (7) and by a face edge section (17) of the second coupling element (8).
8. Lock cylinder according to one or more of the preceding claims, characterized in that that face surface (7') of the coupling element (7, 8) which can be acted on by the key tip (5') closes off the key channel (4) towards the closing element (6).
9. Lock cylinder according to one or more of the preceding claims, characterized in that the second coupling element (8) is constrained in the receiving cavity (14) of the first coupling element (7) by means of holding pins (20).
10. Lock cylinder according to one or more of the preceding claims, characterized in that the holding pins (20) each project into a recess (19) which permits limited rotational movement and an axial movement of the second coupling element (8) relative to the first coupling element (7).

Images