EP1470307B1 - Lock cylinder - Google Patents

Abstract

The invention relates to a lock cylinder comprising a cylinder housing (2) and a cylinder core (6), rotatably mounted in the latter, said core having a key channel (7) for inserting a key (9). Conventionally, the rotational motion of the cylinder core is locked by means of a tumbler element that traverses the rotating joint (F) between the cylinder core (6) and cylinder housing (2). According to the invention, the tumbler element is configured as a locking part that can be shifted from a lock position into a release position in the direction of insertion of the key, said locking part co-operating with a motion transfer member (17) that can be displaced transversally in relation to the direction of insertion of the key, during the shift from the lock position into the release position. The motion transfer member is a pin, which can be brought out of an inactive position that corresponds with the lock position of the locking part into an active position that permits the displacement of the locking part (33) into the release position by the insertion of the key (9).

Description

The invention relates to a lock cylinder with a rotatably mounted in a cylinder housing, a keyway for inserting a key having cylinder core whose rotation is normally locked by means of at least one of the fulcrum between cylinder core and cylinder housing intersecting tumbler, wherein the tumbler element in Schlüsseleinsteckrichtung of a blocking in forms a release position displaceable locking part, which cooperates with a displaceable transversely to the Schlüsseleinsteckrichtung motion transmission member in its displacement from the locking into the release position.

A lock cylinder of the specified type is known from EP 0 613 987 B1 wherein the cylinder core accommodates two diametrically located, slider-like locking parts, which constitute tumbler elements. The outer edges of the locking parts are formed like a fireplace. With their comb teeth are the locking parts in form-fitting locking openings of the cylinder housing, which connect locking holes parallel to each other extending annular grooves of the cylinder housing together. The inner edges of the locking parts form locking extensions, which cooperate with recesses key-controlled locking pins. The latter are guided on both sides of the keyway parallel to this and displaceable transversely to the longitudinal direction of the cylinder core. Then, the locking pins in the key channel projecting control extensions, which are controlled by schlüsselbreitseitigen grooves. After insertion of the key, the locking pins are displaced so that their recesses are aligned with the locking extensions of the tumblers or locking parts. In the then beginning closing rotation of the cylinder core by means of the key lying in the diametrical motion transmission members are radially inwardly controlled, which convert over a slanted edge system to the blocking elements from the blocking to the release position. The comb-like extensions of the locking elements enter the inner ring grooves and then allow the complete closing rotation of the cylinder core. To make this possible, a movement play for the comb-like extensions of the locking parts is necessary. If this movement does not exist, it can lead to closure problems.

The object of the invention is based on the object, a lock cylinder of the specified type in such a way that the locking part already passes through the insertion movement of the key in the release position by realizing a simple structure and while avoiding disruption.

According to the invention this object is achieved by a lock cylinder with a rotatably mounted in a cylinder housing, a keyway for inserting a key having cylinder core whose rotation is normally locked by means of at least one of the fulcrum between cylinder core and cylinder housing intersecting tumbler, wherein the tumbler element in Schlüsseleinsteckrichtung of a Blocking in a release position displaceable locking member forms, which cooperates with a transversely displaceable to Schlüsseleinsteckrichtung motion transmission member in its displacement from the locking to the release position, and wherein the motion transmission member by insertion of the key radially outward displaced and, consequently, the locking part of its the blocking position corresponding non-action position in its displacement in the release position enabling operative position can be brought.

Further embodiments of the invention are set forth in claims 2 to 10 and are explained below in relation to the subject matter of claim 1, but may also be independent of importance.

The lock cylinder according to the invention is characterized by high security by a consistently reliable closing. A movement between the locking part and the cylinder housing is not required. The corresponding displacement of the locking member is done in a simple manner already during insertion of the key on the motion transmission member. This is thereby displaced radially outward in the cylinder core and moves along the locking part of the blocking position corresponding to the non-operative position in the release position enabling operative position. Thus, therefore, no slight rotary displacement of the cylinder core is required, which rotary displacement serves to impart the locking part a running in Schlüsseleinsteckrichtung movement. Since you can now do without a backlash, an unauthorized breaking up of the lock cylinder is counteracted. Closing disturbances, which result, for example, in a small movement play, can not even occur. Also, the structure of the lock cylinder can be cost-saving and easy. This is also helped by the fact that the motion transmitting member is a pin. This can be cost-effectively finished as a turned part.

Furthermore, it is advantageous that the blocking part of the motion transmission member is inclined edge-controlled. For this purpose, the pin-shaped motion transmission member can form a conical surface at its corresponding end. To the rotary displacement prevent the cylinder core with the key removed, the locking part is partially on a level of a receiving chamber of the cylinder core for the locking part, which stage of the fulcrum has a smaller distance than the thickness of the locking part amounts. When plugged in, matching key, however, this has shifted over the motion transmission member, the locking member from the support portion of the stage, so that it can dodge radially when turning the cylinder core, in the cylinder core or in its receiving chamber. If the key is removed from the keyway, care is taken that the locking member always returns to its blocking position or its non-operative position. For this purpose, the locking member is spring-biased in the locked position and is pushed in particular by the force of the spring on the stage.

The safety value is further optimized by the fact that the blocking part lies in front of the head of complementary locking pins. These interact with the key broadside or recesses provided there. If these are missing, the complementary locking pins can not shift and lock the locking member against inward movement into the receiving chamber. Is brought by the insertion of the key, the locking member in its operative position, it is controlled radially inwardly upon rotation of the cylinder core of the wall of a locking groove formed by the cylinder housing. The wall can be rounded or truncated cone-shaped.

With regard to a simple production of the locking part, this may have the shape of a sharpened cylinder pin. At the pointed end preferably attacks the corresponding pointed head of the motion transmission member.

Another version of the locking member is characterized in that the motion transmission member attacks pin center and cooperates with a provided with oblique walls recess of the locking member. Variations in the position of recess and motion transmitting member are possible. It is always realized that when inserting the key in the Einschubendphase via the motion transmission member, the locking member enters the release position or operative position.

Also, variations in the control of the locking member by the key are possible. Thus, the locking member can be controlled by means of a key shank movably associated spacer. In the version in which the motion transmitting member acts like a pin, forming a conical tip of the motion transmitting member a sliding surface on which a particular oblique control edge of the locking member can slide when a radial force is exerted on the locking member during rotation. So that a proper control of the motion transmission member is always ensured by the key broadside, the motion transmission member is characterized by a stop-limited entry into the keyway. It is possible to provide two identical locking parts in a lock cylinder. However, differently designed locking parts can be assigned to the lock cylinder. Here, in particular, a lying approximately in the diametrical position of the locking parts offers.

Alternatively, the motion transmitting member may engage remotely from the locking member end at a sheet recess. When inserting the locking cylinder associated key from this, the motion transmission member is controlled so that it has an endeavor to get to the lowest point of the sheet recess. The blocking part moves concurrently into its release position. Because of this fact, one achieves the advantage that the position of the motion transmission member and also the arch recess is used for coding. It proves both manufacture and cost, if the motion transmission member is a ball. This idea can be continued by placing the locking part in front of the head of supplementary guard balls. Thus, during the insertion or withdrawal movement of the key, the supplementary tumbler balls can perform a corresponding, transverse to the direction of displacement of the key shank movement, the complementary Zuhaltungskugeln is opposite to a longitudinal recess of the locking part. A particularly protected arrangement of the motion transmission member is obtained in this version in that the arcuate recess of the locking member beyond the longitudinal recess at the inside end forms a segment-shaped trough whose diameter is greater than the ball diameter of the motion transmission member. This means that this motion transmission member is in the shadow of the complementary tumbler balls and is not accessible by means of picking tools. Finally, an advantageous embodiment according to the invention is that a substantially blunt end of the locking member rests on the step. This gives the locking part the necessary support. From its support position, the locking member is brought only by the motion transmission member at insertion of the regulatory key.

Figur 1

eine Ansicht eines Schließzylinders,

Figur 2

den Schnitt nach der Linie II-II in Figur 1,

Figur 3

den Schnitt nach der Linie III-III in Figur 2,

Figur 4

einen vergrößerten Ausschnitt IV-IV in Figur 3,

Figur 5

einen Querschnitt durch den Zylinderkern auf Höhe einer mit dem nadelförmigen Sperrteil zusammenwirkenden Ergänzungszuhaltung,

Figur 6

eine perspektivische Darstellung des Zylinderkerns mit Blick auf das nadelförmige Sperrteil,

Figur 7

den Schnitt nach der Linie VII-VII in Figur 2 unter Veranschaulichung des leistenförmigen Sperrteils,

Figur 8

einen vergrößerten Ausschnitt VIII-VIII in Figur 7,

Figur 9

einen vergrößerten Ausschnitt IX-IX in Figur 2,

Figur 10

in perspektivischer Darstellung den Schließzylinder, im Bereich des leistenförmigen Sperrteils, aufgebrochen dargestellt,

Figur 11

den entständigen Bereich des Schlüsselschaftes eines den Schließzylinder schließenden Schlüssels,

Figur 11a

einen Ausschnitt des Schlüsselschaftes im Querschnitt,

Figur 12

den Schließzylinder bei in den Schlüsselkanal eingestecktem Schlüssel und teilweise gedrehtem Zylinderkern,

Figur 13

eine Ansicht des Zylinderkerns mit eingestecktem Schlüssel, und zwar mit Blick auf das nadelförmige Sperrteil,

Figur 14

den Schnitt nach der Linie XIV-XIV in Figur 13,

Figur 15

einen vergrößerten Ausschnitt XV-XV in Figur 14,

Figur 16

einen Querschnitt durch den Zylinderkern auf Höhe des Bewegungsübertragungsgliedes bei eingestecktern Schlüssel,

Figur 17

einen der Figur 2 vergleichbaren Querschnitt, und zwar bei eingeschobenem Schlüssel,

Figur 18

einen Schnitt wie Figur 14, jedoch in der Anfangsphase der Schließdrehung bei radial einwärts verlagertem, nadelartigen Sperrteil,

Figur 19

einen vergrößerten Ausschnitt XIX-XIX in Figur 18,

Figur 20

eine der Figur 17 vergleichbare Darstellung, jedoch bei geringfügig gedrehtern Zylinderkern,

Figur 21

einen vergrößerten Ausschnitt XXI-XXI in Figur 20 und

Figur 22

eine perspektivische Darstellung des Schließzylinders gemäß einer Drehstellung des Zylinderkerns mittels eines Schlüssels, welcher eine Ausweichbohrung für das zugehörige Bewegungsübertragungsglied ausbildet und somit keine Verlagerung des leistenartigen Sperrteils in die seine Freigabestellung ermöglichende Wirkstellung erlaubt.

Figur 23

teils in Draufsicht, teils im Halbschnitt den Schließzylinder gemäß dem zweiten Ausführungsbeispiel mit in einsteckbereitem Zustand des Schlüssels,

Figur 24

eine perspektivische Darstellung der Figur 23,

Figur 25

eine der Figur 23 vergleichbare Darstellung, und zwar während der Einschubverlagerung des Schlüssels in der Endphase,

Figur 26

die Folgedarstellung der Figur 25, wobei der Schlüssel vollends eingeschoben ist und

Figur 27

die Folgedarstellung der Figur 26, wobei mittels des eingesteckten Schlüssels der Zylinderkern geringfügig gedreht ist unter Veranschaulichung des radial einwärts verlagerten Sperrteils.

Hereinafter, an embodiment of the invention will be explained with reference to the drawings. Show it:

FIG. 1

a view of a lock cylinder,

FIG. 2

the section along the line II-II in FIG. 1 .

FIG. 3

the section along the line III-III in FIG. 2 .

FIG. 4

an enlarged section IV-IV in FIG. 3 .

FIG. 5

a cross section through the cylinder core at the level of a cooperating with the needle-shaped locking member complementary tumbler,

FIG. 6

a perspective view of the cylinder core with a view of the needle-shaped locking part,

FIG. 7

the section along the line VII-VII in FIG. 2 illustrating the strip-shaped blocking part,

FIG. 8

an enlarged section VIII-VIII in FIG. 7 .

FIG. 9

an enlarged section IX-IX in FIG. 2 .

FIG. 10

in a perspective view of the lock cylinder, in the region of the strip-shaped locking part, broken away,

FIG. 11

the terminal area of the key shank of a key closing the lock cylinder,

FIG. 11a

a section of the key shank in cross section,

FIG. 12

the lock cylinder with key inserted into the keyway and partially turned cylinder core,

FIG. 13

a view of the cylinder core with inserted key, with a view of the needle-shaped locking part,

FIG. 14

the section along the line XIV-XIV in FIG. 13 .

FIG. 15

an enlarged section XV-XV in FIG. 14 .

FIG. 16

a cross section through the cylinder core at the height of the motion transmission member with inserted key,

FIG. 17

one of the FIG. 2 comparable cross-section, with the key inserted,

FIG. 18

a cut like FIG. 14 but in the initial phase of the closing rotation with a radially inwardly displaced, needle-like blocking part,

FIG. 19

an enlarged section XIX-XIX in FIG. 18 .

FIG. 20

one of the FIG. 17 comparable representation, but with slightly rotated cylinder core,

FIG. 21

an enlarged section XXI-XXI in FIG. 20 and

FIG. 22

a perspective view of the lock cylinder according to a rotational position of the cylinder core by means of a key which forms an alternative bore for the associated motion transmission member and thus no displacement of the strip-like locking member in its release position enabling operative position allowed.

FIG. 23

partly in plan view, partly in half section, the lock cylinder according to the second embodiment with in einsteckbereitem state of the key,

FIG. 24

a perspective view of FIG. 23 .

FIG. 25

one of the FIG. 23 comparable representation, during insertion of the key in the final phase,

FIG. 26

the following presentation of the FIG. 25 , with the key is fully inserted and

FIG. 27

the following presentation of the FIG. 26 , wherein by means of the inserted key, the cylinder core is rotated slightly, illustrating the radially inwardly displaced locking part.

The designated as a whole with the numeral 1 lock cylinder has according to the first embodiment of the FIGS. 1 to 22 a cylinder housing 2. The latter is composed of a circular cylindrical portion 3 and a radially projecting from this flange 4. 4

The section 3 has a central core hole 5 for receiving a diameter-matched cylinder core 6. In the middle of this is equipped with a cross-sectional profiled keyway 7, whose narrow edge extends to the fulcrum F of the cylinder core 6. A row of tumbler pins 8 extends on each side of the key channel longitudinal center plane, the one tumbler pins of one row being offset from the tumbler pins of the opposite row. The tumbler pins 8 are composed in a known manner from a respective core pin and a housing pin. When inserted into the key channel 7 key 9, the parting line between the housing pins and core pins of the tumblers 8 at the height of the fulcrum F of the cylinder core 6, so that the latter can be rotated. The tumblers 8 sit non-rotatably in cross-section matched guide holes of the cylinder core and the cylinder housing 3 and are loaded by pin springs 10 in the direction of the cylinder core.

To prevent rotation of the cylinder core 6 with removed key 9 are also used in Schlüsseleinsteckrichtung from a blocking in a release position movable locking parts 11, 12, which also constitute tumblers. These could also be used if only one row or no row of tumblers 8 were provided.

The one locking element 11 is designed needle-shaped and has the shape of a sharpened cylinder pin. With a part of its cross-section emerges with deducted Key 9, the locking member 11 in a locking groove 13 of the cylinder housing 2 a. The latter is equipped with roof-shaped flanks. With the other cross section, the blocking part 11 dips into a receiving chamber 14 of the cylinder core 6. A near the head 6 'of the cylinder core 6 arranged compression spring 15 loads the locking member 11 in the direction of the inner end of the cylinder core. As a result, the blocking part 11 is pushed over an end-side step 16 of the receiving chamber 14 via the sharpening 11 ', which step 16 prevents a radial inward displacement of the blocking part 11. This attacks penendendseitig at the Anspitzung 11 'of the locking member 11 and this forms a conical tip 18. The latter is located on a larger diameter head 19 of the motion transmission member 17. A Stepped offset transverse bore 20, which is open to the keyway 7, receives the pin-shaped motion transmission member 17 and allows a stop-limited entry thereof into the keyway 7, cf. Fig. 4 , This creates the stop limit for the spring-loaded locking part 11. As in particular Fig. 4 illustrated, the locking member 11 supporting step 16 is disposed at a distance from the rotary joint F, which is smaller than the thickness of the locking member 11 is.

Fig. 3 and 5 let recognize that the locking member 11 is located in front of head of Ergänzungszuhaltungsstiften 21. The latter are received by stepped guide bores 22 of the cylinder core 6. The guide holes 22 are open to the respective broad side of the key channel 7. The opposite end of the guide holes 22 penetrates the receiving chamber 14, so that the unspecified heads of Ergänzungszuhaltungsstifte 21 can slide to the outer surface of the locking member 11. The inner ends of the Ergänzungszuhaltungsstifte 21 cooperate with recesses 23 on the key broad side surfaces of the key shank 9 'together. The key shank 9 'is designed so that the use of the key 9 is given as a reversible key.

For controlling the motion transmitting member 17, the key shank 9 'has a movably shaped spacer 24. This is designed in the form of a role with movement play. The with movement play the roller bore 24 'by cross roller axis 25 is inclined to the longitudinal center plane of the key shank 9. The movable spacer 24, so the role is determined by the relevant wall of the Keyway 7 controlled so that the opposite roller circumference moves the motion transmission member 17 in the radial outward direction.

To classify the tumbler pins 8 go from the narrow sides of the key shank 9 'correspondingly deep cut recesses 26, which left on both sides of the key shank recesses provided on the key narrow side a bridge between them. As a result, a sawtooth-like structure of the key shank is avoided. In particular Fig. 11a shows the flanks a of the recesses 26 with the adjacent key broadside an angle α, which has a size of 105 ° - 110 °. These flanks a are adapted to the oblique course of the top surfaces of the tumbler pins 8, so that when inserting or removing the key 9 a reduction in wear is achieved.

In approximately diametrically opposite to the locking part 11 of the cylinder core 6 takes the sliding in Schlüsseleinsteckrichtung locking member 12. With a partial area protrudes this key removed 9 in a locking groove 27 of the cylinder housing 2 into it. This locking groove 27 has a trapezoidal shape in cross section. The locking member 12 is created in contrast to the locking member 11 in non-circular cross-section. Only the outer, projecting into the locking groove 27 area is designed semicircular. The semicircular arc merges into two parallel flanks 28 and 29, which are interconnected by a bottom section 30 extending in the key insertion direction. For receiving the thus configured locking member 12 is a cylinder core side receiving chamber 31, which excludes a rotation of the locking member 12. Also this locking member 12 is under the load of a near the head 6 'of the cylinder core 6 arranged compression spring 32. This loaded the locking member 12 in the axial inward direction. An end tipping 12 'causes the locking member 12 spring-loaded on a step 31' of the receiving chamber 31 slides and is thus supported against displacement in the radial inward direction with the key removed, in particular Fig. 8 ,

In contrast to the locking member 11 now engages the motion transmission member 33 centrally on the locking member 12 at. This motion transmission member 33 is mushroom-shaped and cooperates with a conical tip 34 with a recess provided with oblique walls 35 of the locking member 12 together. In particular Fig. 9 illustrated, the recess 35 is cut from the corner between edge 28 and bottom portion 30 to form an oblique control edge 36th

When the key 9 is removed, the locking member 12 urges the motion transmission member 33 in the region of its recess 35, which movement transmission member 33 rests limited in stop in a stepped stepped bore 37 of the cylinder core 6. The inner end of the motion transmission member 33 protrudes into the keyway 7, cf. Fig. 9 ,

With regard to the motion transmitting member 33 is basically a Ergänzungszuhaltungsstift. This lies with other Ergänzungszuhaltungsstiften 38 in a row, which Ergänzungszuhaltungsstifte 38 cooperate with recesses 39 on the key broadside surfaces.

The following mode of action occurs:

If the key 9 belonging to the lock cylinder 1 is not inserted into the keyway 7, the cylinder core 6 is locked by the tumbler elements 8, 11 and 12 against rotation within the cylinder housing 2.

A closing rotation of the cylinder core 6 requires the insertion of the key 9 in the keyway 7. By the recesses 26 of the key 9, the tumbler pins 8 are arranged so that the parting line between the core pins and housing pins is at the height of the rotary joint F. Furthermore, the motion-transmitting member 17 is acted upon via the roller-like spacer 24, which in turn via the inclined edge control the locking member 11 in the position according to Fig. 13 to 16 shifts. This means that the pressure spring 15 opposite end of the locking member 11 leaves the step 16 and accordingly enters the operative position from the non-operative position. Also, via the motion transmission member 33, which is controlled by the respective wide surface of the key shank 9 ', a displacement of the locking member 12 in the axial direction. Namely, the conical tip 34 tends to reach the deepest point of the recess 35. In this shift, the locking member 12 leaves its support on the step 31 ', whereby the locking member 12 enters the operative position. It can now be rotated by means of the key 9 of the cylinder core 6, cf. Fig. 12 . 17 to 21 , Along the walls of the locking grooves 13, 27, the locking members 11, 12 are moved radially inwardly. The locking member 11 displaces the Ergänzungszuhaltungsstifte 21 in the recesses 23 of the key shank 9 'into it, while the locking member 12 moves the associated Ergänzungszuhaltungsstifte 38, which in turn dive into the recesses 39 of the key shank 9'. Exclusively that Motion transfer member 33 can not dodge, so that the locking member 12 remains fixed in the axial direction. During the rotational displacement of the cylinder core 6, the conical tip 34 of the motion transmission member 33 forms a sliding surface on which the oblique control edge 36 of the locking member 12 can slide. It turns this position according to FIGS. 20 and 21 one.

If an incorrect key 40 is used, as in Fig. 22 Although it illustrates all the tumblers 8 and 11, but forms a bore 41 for the motion transmitting member 33 on its broad surface, the locking member 12 is not displaced. It retains its support at the stage 31 ', so that a radial deflection displacement of the locking member 12 is not possible. It remains accordingly in his the fulcrum between the cylinder core 6 and cylinder housing 2 crossing position. The lock cylinder is therefore not closable.

That in the FIGS. 23-27 illustrated second embodiment differs from the first substantially in that with the key removed 9, the keyway 7 of the cylinder core 6 extends transversely directed to the lock cylinder longitudinal center plane. That is, the recesses 26 are provided on the key shank 9 'in two rows on each key width surface. It is also a reversible key realized, so that in the turned positions of the key 9, the two rows of tumbler pins 8 of the lock cylinder 1 'can be arranged.

In the wide surface plane of the key channel 7 is the receiving chamber 31, in which a locking member 42 is housed. This corresponds in its construction and cross-section substantially the locking member 12. The compression spring 32 loads the locking member 42 in the inward direction, with its blunt end 42 'is supported on a transverse shoulder of the receiving chamber 31, compare Fig. 23 , At a short distance from this blunt end 42 ', the blocking part 42 forms a sheet recess 43. The latter is designed in the form of a segment-shaped trough. The arcuate recess 43 acts together with a motion transmission member 44. The latter is guided in a bore 45 open towards the narrow side of the key channel 7, which bore 45 connects the key channel 7 and the receiving chamber 31 with each other. How out Fig. 23 it can be seen, the diameter of the spherical motion transmission member 44 is greater than the respective wall thickness between the receiving chamber 31 and keyway 7. When not key 9 is inserted, there is a slight displacement of the motion transmitting member 44 with respect to the arcuate recess 43, wherein the offset to the plug-in end of the keyway 7 consists. When not inserted key 9, the substantially blunt end of the locking member 42 is located on the stage 31 'of the support chamber. In addition, in this position, the portion of the blocking part 42 lying opposite the step 31 'protrudes into the locking groove 27 of the cylinder housing 2. In this way, the locking member 42 counteracts a rotational displacement of the cylinder core 6.

At its front end is at the height of the narrow side of the key shank 9 'from a groove 46, which cooperates with the spherical motion transmission member 44. Due to the configuration of the key 9 as a reversible key, two such grooves 46 are diametrically opposed to the key shank 9 '.

In alignment facing the locking member 42 are arranged in the wall between receiving chamber 31 and key channel 7, the motion transfer member 44, three further holes 47. In these supplemental tumble balls 48 are present, which correspond in diameter to that of the motion transmitting member 44. This means that these Ergängzungs-Zuhaltungskugeln 48 extend partially narrow side in the keyway 7 and in the receiving chamber 31, as Fig. 23 illustrated. Opposite Zuhaltungskugeln 48 opposite a longitudinal recess 49 of the non-rotatably arranged in the receiving chamber 31 locking member 42. Beyond this longitudinal recess 49 is the arcuate recess 43, which is designed as a segmental trough. Due to the fact that the ball diameter of all balls is greater than the thickness of the keyway 7, the balls can not fall from their positionally correct position in the keyway 7.

Furthermore, not shown, also spherical shaped complementary tumblers may be provided on the lock cylinder, which are arranged by corresponding recesses of the key shank 9 '.

If the closing operation is to be performed by means of the key 9, then its key shank 9 'is first to be introduced into the key channel 7. In this process, the spherical motion transmission member 44 passes through the groove 46 extending from the key face Fig. 25 reached. The complementary tumblers 48 have been displaced out of the keyway 7 by the key edge. You can enter 42 in the longitudinal recess 49 of the locking member.

Upon further insertion of the key 9, the position according to Fig. 26 achieved. Then the supplementary tumbler balls 48 are aligned with their associated recesses 50 on the narrow side of the key shank 9 ', so that the supplementary tumbler balls 48 can leave the longitudinal recess 49 of the locking part. At the same time, the spherical motion transmitting member 44 is disengaged from the groove 46 and then rests on the key shank narrow edge, resulting in an outward radial displacement of the motion transmitting member 44. In this case, an axial displacement of the locking member 42 against the force of the compression spring 32 is effected via a sloping edge control by partial entry of the motion transmitting member 44 into the trough 43. As a result, the support of the blocking part 42 is placed on the stage 31 '. At the beginning then turning the key is in the initial phase, the position after Fig. 27 reached. The locking member is controlled from the locking groove 27 in the radially inward direction. Overlay experiences that blocking part 42 by the motion transmission member 44 a further axial displacement against the spring action. The radial inward displacement of the blocking part 42 is made possible by the longitudinal recess 49, in which the supplementary tumbler balls 48 enter with their projecting into the receiving chamber 31 area. The further closing rotation by means of the key can then be continued trouble-free.

Claims (21)

1. Lock cylinder with a cylinder core (6), held rotatably in a cylinder housing (2) and comprising a key channel (7) for insertion of a key (9), the rotatability of which is normally blocked by means of at least one tumbler element crossing the rotary joint (F) between cylinder core (6) and cylinder housing (2), the tumbler element forming a blocking part (11, 12, 42) which is displaceable in the key insertion direction from a blocking into a release position and cooperates with a movement transmission member (17, 33, 44) which is movable transversely to the key insertion direction when it is displaced from the blocking into the release position, characterised in that the movement transmission member (17, 33, 44) is displaceable radially outwards by inserting the key (9) and that accompanied thereby the blocking part (11, 12, 42) can be brought from its non-operational position corresponding to the blocking position into an operational position allowing its displacement into the release position.
2. Lock cylinder according to claim 1, characterised in that the movement transmission member (17, 33) is a pin.
3. Lock cylinder according to either one of the preceding claims, characterised in that the blocking part (11, 12) is steered on an oblique flank by the movement transmission member (17, 33).
4. Lock cylinder according to any one of the preceding claims, characterised in that when the key is removed the blocking part (11, 12, 42) partially rests on a step (16, 31, 31') of a receiving chamber (14, 31) of the cylinder core (6) for the blocking part (11, 12, 42), which is at a smaller distance from the rotary joint (F) than the thickness of the blocking part (11, 12, 42) amounts to and when the appropriate key (9) is inserted is displaced out of the support region of the step (16, 31, 31') in order to yield radially when the cylinder core (6) rotates.
5. Lock cylinder according to claim 4, characterised in that the blocking part (11, 12, 42) is spring-biased in the blocking position and is pushed onto the step (16, 31, 31') in particular by the force of the spring (15, 32).
6. Lock cylinder according to any one of the preceding claims, characterised in that the blocking part (11, 12) is located at the head of supplementary tumbler pins (21, 38).
7. Lock cylinder according to any one of the preceding claims, characterised in that the blocking part (11, 12, 42) is steered radially inwards by the wall of a blocking groove (13, 27) formed by the cylinder housing (2) when the cylinder core (6) rotates.
8. Lock cylinder according to any one of the preceding claims, characterised in that the blocking part (11) has the form of a sharpened cylinder pin.
9. Lock cylinder according to any one of the preceding claims, characterised in that the movement transmission member (17) engages on the end of the pin.
10. Lock cylinder according to any one of the preceding claims, characterised in that the movement transmission member (33) acts on the centre of the pin and cooperates with a recess (35) in the blocking part (12) provided with oblique walls.
11. Lock cylinder according to any one of the preceding claims, characterised in that the blocking part (11) can be steered by means of a spacer piece (24) movably allocated to the key shank (9).
12. Lock cylinder according to any one of the preceding claims, characterised in that a conical tip (34) of the movement transmission member (33) forms a sliding face on which an, in particular, oblique steering flank (36) of the blocking part (12) can slide down when a radial force is exerted onto the blocking part (12) during rotation.
13. Lock cylinder according to any one of the preceding claims, characterised by an entrance of the movement transmission member (17, 33) into the key channel (7) limited by a stop.
14. Lock cylinder according to any one of the preceding claims, characterised by two blocking parts (11, 12) located approximately diametrically opposite one another.
15. Lock cylinder according to any one of the preceding claims, characterised in that the key shank (9) forms indentations (26) issuing from its narrow edges, the flanks (a) of which enclose an angle α of 105° - 110° with the broad side of the key, which indentations (26) cooperate with chamfered head faces of the pin-shaped tumbler elements (8).
16. Lock cylinder according to any one of the preceding claims, characterised in that the movement transmission member (44) acts on an arched recess (43) at a minimal distance from the end of the blocking part.
17. Lock cylinder according to any one of the preceding claims, characterised in that the movement transmission member (44) is a ball.
18. Lock cylinder according to any one of the preceding claims, characterised in that the blocking part (42) is located at the head of supplementary tumbler balls (48).
19. Lock cylinder according to claim 18, characterised in that a longitudinal recess (49) of the blocking part (42) is located opposite the supplementary tumbler balls (48).
20. Lock cylinder according to any one of claims 16 to 19, characterised in that the arched recess (43) of the blocking part (42) forms a segment-shaped trough on the far side of the longitudinal recess (49) on the inside end, the diameter of which is larger than the ball diameter.
21. Lock cylinder according to any one of claims 4 to 20, characterised in that a blunt end (42') of the blocking part (42) rests on the step (31').

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