WO2003064795A1

WO2003064795A1 - Lock cylinder

Info

Publication number: WO2003064795A1
Application number: PCT/EP2003/000890
Authority: WO
Inventors: Peter Braun
Original assignee: Dom Sicherheitstechnik Gmbh & Co. Kg
Priority date: 2002-01-31
Filing date: 2003-01-29
Publication date: 2003-08-07
Also published as: EP1470307A1; DK1470307T3; EP1470307B1; DE50309199D1; ES2300584T3; ATE386860T1

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

lock cylinder

The invention relates to a lock cylinder with a cylinder core rotatably mounted in a cylinder housing and having a key channel for inserting a key, the rotatability of which is normally blocked by means of at least one tumbler element crossing the rotary joint between the cylinder core and the cylinder housing, the tumbler element being a lock in the key insertion direction - Forms a locking part which can be displaced into a release position and which interacts with a movement transmission element which can be displaced transversely to the key insertion direction during its displacement from the locking position into the release position.

A locking cylinder of the type specified is known from EP 0 613 987 B1, the cylinder core receiving two slide-like locking parts lying in the diametral, which represent tumbler elements. The outer flanks of the locking parts are designed like chimneys. With their comb teeth, the locking parts lie in form-fitting locking openings in the cylinder housing, which connect locking openings parallel to one another in the annular grooves of the cylinder housing. The inner flanks of the locking parts form locking projections, which interact with recesses in key-controlled locking pins. The latter are guided parallel to the key channel on both sides and displaceable transversely to the longitudinal direction of the cylinder core. The locking pins then have control projections projecting into the key channel, which are controlled by grooves on the key side. After insertion of the key, the locking pins are shifted so that their recesses are aligned with the locking extensions of the tumbler elements or locking parts. When the cylinder core then begins to rotate by means of the key, movement transmission members lying in the diametral are controlled radially inwards, which transfer them from the blocking position into the release position via an inclined flank system to the blocking elements. The comb-like extensions of the locking elements enter the inner ring grooves and then allow the complete closing rotation of the cylinder core. In order to make this possible, a movement play for the comb-like extensions of the locking parts is necessary. If this movement is not available, locking errors can occur.

The object of the invention is based on the object of designing a locking cylinder of the type specified in such a way that the locking part already reaches the release position by inserting the key while realizing a simple structure and avoiding locking faults. According to the invention, this object is achieved by a locking cylinder with a cylinder core rotatably mounted in a cylinder housing and having a key channel for inserting a key, the rotatability of which is normally blocked by means of at least one locking element crossing the rotary joint between the cylinder core and the cylinder housing, the locking element being inserted in the key insertion direction forms a locking part which can be displaced into a release position and which interacts with a movement transmission element which can be displaced transversely to the key insertion direction when it is shifted from the locking position into the release position, and wherein the movement transmission element moves from an inactive position corresponding to the locking position of the locking part an operative position enabling its shift into the release position can be brought.

Further refinements of the invention are specified in claims 2 to 10 and are explained below in relation to the subject matter of claim 1, but can also be of independent importance.

The locking cylinder according to the invention is characterized by a high level of security due to a reliable locking method. A play in movement between the locking part and the cylinder housing is not necessary. The corresponding displacement of the locking part takes place in a simple manner already when the key is inserted via the movement transmission element. This is shifted radially outward in the cylinder core and, along with it, shifts the locking part from the inactive position corresponding to the locked position into the active position which enables the release position. Thus, no slight rotational displacement of the cylinder core is required, which rotational displacement serves to impart a movement in the key insertion direction to the locking part. Since there is now no need for rotary play, unauthorized opening of the locking cylinder is also counteracted. Locking faults, which occur, for example, when there is little movement, cannot occur at all. The structure of the locking cylinder can also be designed to be cost-effective and simple. The fact that the movement transmission element is a pin also contributes to this. This can be manufactured cost-effectively as a turned part.

It is also advantageous that the blocking part is controlled by the motion transmission member with inclined flanks. For this purpose, the pin-shaped movement transmission member can form a conical surface at its corresponding end. To the rotary To prevent the cylinder core from being removed when the key is removed, the locking part lies in some areas on a step of a receiving chamber of the cylinder core for the locking part, which step has a smaller distance from the rotary joint than the thickness of the locking part. When the appropriate key is inserted, on the other hand, it has shifted the locking part out of the support area of the step via the movement transmission member, so that it can move radially when the cylinder core is rotated, namely into the cylinder core or into its receiving chamber. If the key is withdrawn from the key channel, care is taken to ensure that the locking part always returns to its locking position or its inactive position. For this purpose, the locking part is spring-biased in the locking position and is pushed onto the step in particular by the force of the spring.

The safety value is further optimized by the fact that the blocking part is located in front of the additional tumbler pins. These interact with the key broadside or the depressions provided there. If these are missing, the supplementary tumbler pins cannot shift and lock the locking part against inward movement into the receiving chamber. If the locking part is brought into its operative position by inserting the key, it is controlled radially inwards by the wall of a locking groove formed by the cylinder housing when the cylinder core is rotated. The wall can be rounded or frustoconical.

With regard to simple manufacture of the locking part, this can have the shape of a pointed cylindrical pin. The correspondingly tapered head of the movement transmission member preferably engages at the tapered end.

Another version of the locking part is characterized in that the movement transmission element engages in the middle of the pin and interacts with a recess in the locking part provided with inclined walls. Variations in the position of the recess and the movement transmission element are possible. It is always realized that when the key is inserted in the insertion end phase, the locking part comes into the release position or active position via the movement transmission element.

Variations regarding the control of the locking part by the key are also possible. The locking part can thus be controlled by means of a spacer movably assigned to the key shaft. In the version in which the motion transmission element engages in the center of the pin, a conical tip of the motion Transmission member a sliding surface on which a particularly oblique control flank of the locking part can slide when a radial force is exerted on the locking part during rotation. The movement transmission element is characterized by a stroke-limited entry into the key channel, so that the control of the movement transmission element is always guaranteed by the key broadside. It is possible to provide two locking parts of the same type in a locking cylinder. However, differently designed locking parts can also be assigned to the locking cylinder. Here, in particular, a position of the locking parts lying approximately in the diametrical position is appropriate.

Alternatively, the movement transmission member can act on an arch recess away from the locking part end. When the key belonging to the locking cylinder is inserted, the movement transmission element is controlled by the latter in such a way that it strives to reach the lowest point of the arch recess. At the same time, the locking part shifts to its release position. On the basis of this fact, the advantage is achieved that the position of the movement transmission element and also that of the arch recess are used for coding. It proves to be both manufacturing and inexpensive if the motion transmission member is a ball. This idea can be continued by the fact that the blocking part lies in front of the head of supplementary tumbler balls. So that the supplementary tumbler balls can execute a corresponding movement transverse to the direction of displacement of the key shaft during the insertion or withdrawal movement of the key, the supplementary tumbler balls have a longitudinal recess of the locking part opposite. A particularly protected arrangement of the movement transmission member is obtained in this version in that the arcuate recess of the locking part forms a segment-shaped depression beyond the longitudinal recess on the inside end, the diameter of which is larger than the ball diameter of the

Motion transmitting member. This means that this motion transmission link lies in the shadow of the supplementary tumbler balls and cannot be reached using picking tools. Finally, an advantageous embodiment according to the invention also consists in that an essentially blunt end of the locking part rests on the step. This provides the locking part with the necessary support. The locking part is brought out of its support position only by the movement transmission element when the prescribed key is inserted. An embodiment of the invention is explained below with reference to the drawings. Show it:

FIG. 1 shows a view of a locking cylinder designed according to the invention,

FIG. 2 shows the section along the line II-II in FIG. 1,

3 shows the section along the line III-III in FIG. 2,

FIG. 4 shows an enlarged section IV-IV in FIG. 3,

FIG. 5 shows a cross section through the cylinder core at the level of a supplementary tumbler interacting with the needle-shaped locking part,

FIG. 6 shows a perspective illustration of the cylinder core with a view of the needle-shaped locking part,

FIG. 7 shows the section along the line Vll-Vll in FIG. 2, illustrating the bar-shaped blocking part,

FIG. 8 shows an enlarged section VIII-VIII in FIG. 7,

FIG. 9 shows an enlarged section IX-IX in FIG. 2,

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

FIG. 11 shows the area of the key shaft of a key closing the locking cylinder,

FIG. 11 a shows a section of the key shaft in cross section,

FIG. 12 the locking cylinder with the key inserted in the key channel and the cylinder core partially rotated, FIG. 13 shows a view of the cylinder core with the key inserted, with a view of the needle-shaped locking part,

14 shows the section along the line XIV-XIV in FIG. 13,

FIG. 15 shows an enlarged section XV-XV in FIG. 14,

FIG. 16 shows a cross section through the cylinder core at the level of the movement transmission element with the key inserted,

FIG. 17 shows a cross section comparable to FIG. 2, specifically with the key inserted,

FIG. 18 shows a section like FIG. 14, but in the initial phase of the closing rotation with the needle-like locking part displaced radially inwards,

FIG. 19 shows an enlarged section XIX-XIX in FIG. 18,

FIG. 20 shows an illustration comparable to FIG. 17, but with the cylinder core rotated slightly,

Figure 21 is an enlarged detail XXI-XXI in Figure 20 and

Figure 22 is a perspective view of the lock cylinder according to a rotational position of the cylinder core by means of a key, which forms an escape hole for the associated motion transmission member and thus does not allow the strip-like locking part to be displaced into the operative position which enables its release position.

FIG. 23 partly in top view, partly in half section, the locking cylinder according to the second exemplary embodiment with the key ready for insertion,

FIG. 24 shows a perspective illustration of FIG. 23, FIG. 25 shows a representation comparable to FIG. 23, namely during the insertion of the key in the final phase,

FIG. 26 shows the follow-up view of FIG. 25, the key being fully inserted and

FIG. 27 shows the follow-up view of FIG. 26, the cylinder core being rotated slightly by means of the inserted key, illustrating the locking part displaced radially inwards.

According to the first embodiment according to FIGS. 1 to 22, the locking cylinder designated as a whole by the number 1 has a cylinder housing 2. The latter is composed of a circular-cylindrical section 3 and a flange section 4 projecting radially therefrom.

Section 3 has a central core bore 5 for receiving a diameter-adapted cylinder core 6. In the middle, this is equipped with a cross-sectional key channel 7, one narrow edge of which extends to the rotary joint F of the cylinder core 6. A row of tumbler pins 8 extends on both sides of the key channel longitudinal center plane, one tumbler pin of the one row being offset from the tumbler pins of the opposite row. The tumbler pins 8 are composed in a known manner from a core pin and a housing pin. When key 9 is inserted into key channel 7, the parting line between the housing pins and core pins of tumblers 8 is at the level of rotary joint F of cylinder core 6, so that the latter can be rotated. The tumblers 8 are non-rotatably seated in cross-sectional guide bores in the cylinder core and the cylinder housing 3 and are loaded by pin springs 10 in the direction of the cylinder core.

To secure the rotation of the cylinder core 6 when the key 9 is removed, locking parts 11, 12, which also represent tumbler elements, can also be moved in the key insertion direction from a locking position into a release position. These could also be used if only one row or no row of tumblers 8 were provided.

The one locking element 11 is needle-shaped and has the shape of a pointed cylindrical pin. With a part of its cross-section submerged when the Key 9, the locking part 11 in a locking groove 13 of the cylinder housing 2. The latter is equipped with roof-shaped flanks. With the other cross section, the locking part 11 dips into a receiving chamber 14 of the cylinder core 6. A compression spring 15 arranged near the head 6 'of the cylinder core 6 loads the locking part 11 in the direction of the inner end of the cylinder core. As a result, the locking part 11 is pushed over the tip 11 'over an end step 16 of the receiving chamber 14, which step 16 prevents a radial inward displacement of the locking part 11. The axial displacement of the locking part 11 is limited by a movement transmission member 17 which can be moved transversely to the key insertion direction. This engages at the end of the pin on the point 11 'of the locking part 11 and forms a conical tip 18 for this purpose. The latter is located on a head 19 of the movement transmission member 17 with a larger diameter A stepped transverse bore 20, which is open to the key channel 7, receives the pin-shaped movement transmission member 17 and allows it to be limited in its entry into the key channel 7, see FIG. 4. This results in the stop limitation for the spring-loaded locking part 11. As is particularly shown in FIG 4 illustrates, the step 16 supporting the locking part 11 is arranged at a distance from the rotary joint F which is smaller than the thickness of the locking part 11.

3 and 5 show that the locking part 11 is in front of the head of supplementary tumbler pins 21. The latter are received by stepped guide bores 22 in the cylinder core 6. The guide bores 22 are open to the relevant broad side of the key channel 7. The opposite end of the guide bores 22 penetrates the receiving chamber 14 so that the heads of the supplementary tumbler pins 21, which are not described in any more detail, can slide as far as the outer surface of the locking part 11. The inner ends of the supplementary tumbler pins 21 cooperate with recesses 23 on the key broad side surfaces of the key shaft 9 '. The key shaft 9 'is designed so that the key 9 is used as a reversible key.

To control the movement transmission member 17, the key shaft 9 'has a movably designed spacer 24. This is designed in the form of a role with movement play. The roller axis 25 which passes through the roller bore 24 'with movement is inclined to the longitudinal center plane of the key shaft 9. The movable spacer 24, that is to say the roller, is separated by the wall of the Key channel 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, correspondingly deep-cut recesses 26 start from the narrow sides of the key shaft 9 'and leave a web between them on both sides of the recesses provided on the key shaft. This avoids a sawtooth-like structure of the key shaft. As particularly shown in FIG. 11a, the flanks a of the recesses 26 form an angle α with the adjacent key broadside, which has a size of 105 ° to 110 °. These flanks a are adapted to the inclined course of the head surfaces of the tumbler pins 8, so that wear is reduced when the key 9 is inserted or removed.

The cylinder core 6 receives the locking part 12, which is displaceable in the key insertion direction, approximately diametrically opposite to the locking part 11. With a partial area this protrudes into a locking groove 27 of the cylinder housing 2 when the key 9 is removed. This locking groove 27 also has a trapezoidal shape in cross section. In contrast to the locking part 11, the locking part 12 is created in a non-circular cross section. Only the outer region protruding into the locking groove 27 is semicircular. The semicircular arch merges into two parallel flanks 28 and 29, which are connected to one another by a base section 30 running in the key insertion direction. A receiving chamber 31 on the cylinder core side, which prevents the locking part 12 from rotating, is used to receive the locking part 12 designed in this way. This locking part 12 is also under the load of a compression spring 32 arranged near the head 6 'of the cylinder core 6. This loads the locking part 12 in the axial inward direction. An end-sided tapering 12 'leads to the fact that the locking part 12 slides onto a step 31' of the receiving chamber 31 under spring action and is thus supported against displacement in the radial inward direction when the key is removed, compare in particular FIG. 8.

In contrast to the locking part 11, the movement transmission member 33 now acts centrally on the locking part 12. This movement transmission member 33 is shaped like a mushroom head and interacts with a conical tip 34 with a recess 35 of the locking part 12 provided with inclined walls. As particularly illustrated in FIG. 9, the recess 35 is cut from the corner between the flank 28 and the bottom section 30 to form an oblique control flank 36. When the key 9 is removed, the locking part 12 acts on the movement transmission element 33 in the region of its recess 35, which movement transmission element 33 rests in a step-like offset bore 37 of the cylinder core 6 in a step-like manner. The inner end of the motion transmission member 33 projects into the key channel 7, see FIG. 9.

With regard to the movement transmission element 33, it is basically a supplementary tumbler pin. This is in a row with further supplementary tumbler pins 38, which supplementary tumbler pins 38 interact with depressions 39 on the key broad side surfaces.

The following mode of action occurs:

If the key 9 belonging to the locking cylinder 1 is not inserted into the key channel 7, the cylinder core 6 is blocked 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 key 9 to be inserted into the key channel 7. The tumbler pins 8 are arranged through the recesses 26 of the key 9 such that the parting line between the core pins and housing pins lies at the level of the rotary joint F. Furthermore, the motion-transmitting member 17 is acted on via the roller-like spacer 24, which in turn shifts the locking part 11 into the position according to FIGS. 13 to 16 via the inclined edge control. This means that the end of the locking part 11 opposite the compression spring 15 leaves the step 16 and accordingly moves from the inactive position into the active position. Likewise, a movement of the locking part 12 in the axial direction takes place via the movement transmission member 33, which is controlled by the relevant broad surface of the key shaft 9 '. The conical tip 34 strives to get to the lowest point of the recess 35. During this displacement, the locking part 12 leaves its support on the step 31 ', whereby the locking part 12 comes into the active position. It can now be rotated by means of the key 9 of the cylinder core 6, compare FIGS. 12, 17 to 21. In parallel, the locking parts 11, 12 are moved radially inward via the walls of the locking grooves 13, 27. The locking part 11 shifts the additional tumbler pins 21 into the recesses 23 of the key shaft 9 ', while the locking part 12 shifts the associated supplementary tumbler pins 38, which in turn plunge into the recesses 39 of the key shaft 9'. Exclusively that Movement transmission member 33 is not able to avoid it, so that the locking part 12 remains fixed in the axial direction. During the rotational displacement of the cylinder core 6, the conical tip 34 of the movement transmission member 33 forms a sliding surface on which the oblique control flank 36 of the locking part 12 can slide. The position shown in FIGS. 20 and 21 is established.

If an incorrect key 40 is used, as illustrated in FIG. 22, which although it classifies all the tumbler elements 8 and 11, but forms a bore 41 for the movement transmission member 33 on its broad surface, the locking part 12 is not moved. It maintains its support at step 31 ', so that a radial alternative displacement of the locking part 12 is not possible. Accordingly, it remains in its position crossing the rotary joint between the cylinder core 6 and the cylinder housing 2. The lock cylinder is therefore not lockable.

The second exemplary embodiment illustrated in FIGS. 23-27 essentially differs from the first in that, when the key 9 is removed, the key channel 7 of the cylinder core 6 extends transversely to the central longitudinal plane of the lock cylinder. This means that the depressions 26 on the key shaft 9 'are provided in two rows on each key broad surface. A reversible key is also realized, so that the two rows of tumbler pins 8 of the locking cylinder 1 'can be arranged in the turned positions of the key 9.

The receiving chamber 31, in which a locking part 42 is accommodated, is located in the broad surface plane of the key channel 7. In terms of its structure and cross-section, this essentially corresponds to the locking part 12. The compression spring 32 loads the locking part 42 in the inward direction, its blunt end 42 'being supported on a transverse shoulder of the receiving chamber 31, see FIG. 23, at a short distance from this blunt end 42 ', the locking part 42 forms an arch recess 43. The latter is designed in the form of a segment-shaped trough. The arc recess 43 interacts with a movement transmission element 44. The latter is guided in a bore 45 which is open towards the narrow side of the key channel 7 and which bore 45 connects the key channel 7 and the receiving chamber 31 to one another. As can be seen from FIG. 23, the diameter of the spherical motion transmission member 44 is greater than the wall thickness in question between the receiving chamber 31 and the key channel 7. When the key 9 is not inserted, there is a slight offset of the motion transmission member 44 with respect to the arch recess 43, whereby there is an offset to the insertion end of the key channel 7. When the key 9 is not inserted, the essentially blunt end of the locking part 42 rests on the step 31 'of the support chamber. Furthermore, in this position, the part of the locking part 42 opposite the step 31 ′ projects into the locking groove 27 of the cylinder housing 2. In this way, the locking part 42 counteracts a rotational displacement of the cylinder core 6.

At its front end, at the level of the narrow side of the key shaft 9 ', there is a groove 46 which interacts with the spherical movement transmission element 44. Due to the design of the key 9 as a reversible key, two such grooves 46 are provided in diametrically opposed positions on the key shaft 9 '.

In alignment with the blocking part 42, three further bores 47 are provided in the wall between the receiving chamber 31 and the key channel 7, upstream of the movement transmission element 44. In these there are supplementary tumbler balls 48 which correspond in diameter to that of the movement transmission member 44. This means that these supplementary tumbler balls 48 also protrude partially on the narrow side into the key channel 7 and into the receiving chamber 31, as illustrated in FIG. 23. Opposite the supplementary tumbler balls 48 is a longitudinal recess 49 of the blocking part 42, which is non-rotatably arranged in the receiving chamber 31. Beyond this longitudinal recess 49 there is the arch recess 43, which is designed as a segment-shaped trough. The diameter of this segment-shaped trough 43 is larger than the ball diameter of the movement transmission member 43. Due to the fact that the ball diameter of all balls is larger than the thickness of the key channel 7, the balls cannot fall into the key channel 7 from their correct position.

Furthermore, spherical supplementary tumblers, which are not illustrated and which are arranged in the corresponding recesses of the key shaft 9 ', can also be provided on the locking cylinder.

If the locking process is to be carried out by means of the key 9, this is the key

Key shaft 9 'is first inserted into the key channel 7. In this process, the spherical motion transmission member 44 passes through the

Key 46 outgoing groove 46. It then becomes the position shown in FIG. 25 reached. The supplementary tumbler balls 48 have been displaced out of the key channel 7 by the narrow key edge. You can enter the longitudinal recess 49 of the locking member 42.

When the key 9 is inserted further, the position shown in FIG. 26 is achieved. Then the supplementary tumbler balls 48 are aligned with recesses 50 on the narrow side of the key shaft 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 transmission member 44 is driven out of the groove 46 and then lies on the key shaft narrow edge, which leads to an outward radial displacement of the motion transmission member 44. In this case, an axial displacement of the locking part 42 against the force of the compression spring 32 is brought about via an inclined edge control by partial entry of the movement transmission element 44 into the trough 43. As a result, the support of the locking part 42 is abandoned at the step 31 '. When the key begins to turn, the position shown in FIG. 27 is reached in the initial phase. The locking part is controlled from the locking groove 27 in the radial inward direction. Overlapping, the locking part 42 experiences a further axial displacement against the spring loading by the movement transmission member 44. The radial inward displacement of the locking part 42 is made possible by the longitudinal recess 49, into which the supplementary tumbler balls 48 enter with their area protruding into the receiving chamber 31. The further closing rotation by means of the key can then be continued without any problems.

Claims

EXPECTATIONS

1. Locking cylinder with a cylinder core (6) rotatably mounted in a cylinder housing (2) and having a key channel (7) for inserting a key (9), the rotatability of which is normally by means of at least one the rotary joint (F) between the cylinder core (6) and the cylinder housing (2) crossing locking element is locked, the locking element forming a locking part (11, 12, 42) which can be displaced in the key insertion direction from a locking position into a release position and which has a movement transmission element (17, 33, 44) which can be moved transversely to the key insertion direction its shift from the locking position to the release position cooperates, characterized in that the movement transmission member (11, 12, 42) by inserting the key (9) from an inactive position corresponding to the locking position of the locking part (17, 33) into its shifting position into the Release position enabling active position can be brought.

2. Lock cylinder according to claim 1, characterized in that the movement transmission member (17, 33) is a pin.

3. Lock cylinder according to one of the preceding claims, characterized in that the locking part (11, 12) of the movement transmission member (17, 33) is controlled by oblique flanks.

4. Lock cylinder according to one of the preceding claims, characterized in that the locking part (11, 12, 42) with the key (9) removed in regions on a step (16, 31) of a receiving chamber (14, 31) of the cylinder core (6 ) for the locking part (11, 12, 42), which has a smaller distance from the rotary joint (F) than the thickness of the locking part (11, 12, 42), and with the appropriate key (9) inserted from the support area of the Stage (16, 31) is shifted to avoid radially when turning the cylinder core (6).

5. Lock cylinder according to one of the preceding claims, characterized in that the locking part (11, 12, 42) is spring-biased in the locking position and in particular by the force of the spring (15, 32) is pushed onto the step (16, 31) ,

6. Lock cylinder according to one of the preceding claims, characterized in that the locking part (11, 12) lies in front of supplementary tumbler pins (21, 38).

7. Lock cylinder according to one of the preceding claims, characterized in that the locking part (11, 12) when the cylinder core (6) is rotated radially inwards by the wall of a locking groove (13, 27) formed by the cylinder housing (2).

8. Lock cylinder according to one of the preceding claims, characterized in that the locking part (11) has the shape of a pointed cylinder pin.

9. Lock cylinder according to one of the preceding claims, characterized in that the movement transmission member (17) engages the end of the pin.

10. Lock cylinder according to one of the preceding claims, characterized in that the movement transmission member (33) engages in the middle of the pin and cooperates with a recess (35) in the locking part (12) provided with inclined walls.

11. Locking cylinder according to one of the preceding claims, characterized in that the locking part (11) is controlled by means of a spacer (24) movably assigned to the key shaft (9).

12. Lock cylinder according to one of the preceding claims, characterized in that a conical tip (34) of the motion transmission member (33) forms a sliding surface on which a particularly oblique control flank (36) of the locking part (12) can slide when a radial force when turning is exerted on the locking part (12).

13. Lock cylinder according to one of the preceding claims, characterized by a stop-limited entry of the movement transmission member (17, 33) into the key channel (7).

14. Lock cylinder according to one of the preceding claims, characterized by two approximately diametrically opposite locking parts (11, 12).

15. Locking cylinder according to one of the preceding claims, characterized in that the key shaft (9) from its narrow edges forms recesses (26), the flanks (a) of which form an angle α of 105 ° - 110 ° with the key broadside

Interact recesses (26) with beveled head surfaces of the pin-shaped tumbler elements (8).

16. Lock cylinder according to one of the preceding claims, characterized in that the movement transmission member (44) is slightly removed from

The end of the locking part engages in an arch recess (43).

17. Lock cylinder according to one of the preceding claims, characterized in that the movement transmission member (44) is a ball.

18. Lock cylinder according to one of the preceding claims, characterized in that the locking part (42) is in front of the head of supplementary tumbler balls (48).

19 locking cylinder according to one of the preceding claims, characterized in that the supplementary tumbler balls (48) opposite a longitudinal recess (49) of the locking part (42).

20. Lock cylinder according to one of the preceding claims, characterized in that the arch recess (43) of the locking part (42) beyond the

Longitudinal recess (49) forms a segment-shaped trough at the inner end, the diameter of which is larger than the ball diameter.

21. Lock cylinder according to one of the preceding claims, characterized in that a blunt end (42 ') of the locking part (42) on the step

(31 ') rests.