EP0067388B1 - Cylinder lock - Google Patents

Abstract

1. Rotary cylinder lock comprising an associated key (2), especially a flat key with longitudinal slots made in its rectangular basic profile, a housing (1) especially in the form of a cock profile, an a cylindrical core (4), in which there are, transversely relative to the plane or planes passing through the tumber pins (18, 19), detent pin bores (15) of the same diameter for receiving springless detent pins (7) which are provided with heads (13) facing away from the key and which are received in counter-sinks (16) of the same depth made in the periphery (14) of the core, a cup (11) or the like being assigned in the inner wall of the housing to each of the detent-pin bores (15), and a cup (12) or the like being assigned, in the wide side of the flat key, to at least one of these detent-pin bores for the respective detent pins (7), characterised in that the detent-pin bores (15) each lie, at least on the outer periphery (14) of the core (4), in the transverse plane of a tumbler pin (18) in relation to the rotary cylinder lock, the diameters (D) of the countersinks (16) are equal to or greater than the diameters (d) of the tumbler pins (18), and there are arranged in the detent-pin bore or bores (15), to which no cups (12) are assigned in the wide side (5) of the key (2), dummy pins (24) which, when they come up against the wide side (5) of the key (2), are flush with the periphery (14) of the core (4), the heads (25) of the dummy pins (24) being made lower (h) than the heads (13) of the detent pins (7).

Description

The invention relates to a rotary cylinder lock according to the preamble of claim 1.

A rotary cylinder lock of this type is described and shown in DE-A-20 03 059.

In addition to the possibilities of creating a multitude of locking variations through different notch incisions for the tumbler pins and different key cross-sectional profiles, this rotary cylinder lock offers the possibility of creating further locking variations by differently fitting locking pin holes with locking pins, depending on the actual occupation, the calottes have to be provided in the key.

Rotary cylinder locks of this known type have been introduced on the market and have proven themselves. A disadvantage, however - as with most rotary cylinder lock types - can still be seen in the fact that the security of the lock can be reduced by manipulation of the key - although with considerable effort - but still possible.

Rotary cylinder lock designs have already become known (DE-A-2411362, DE-A-29 10 886), in which so-called additional locking pins are provided to solve the above-described disadvantage, which align with the periphery of the core when applied to the broad side of the inserted key. If the key is wrong, e.g. the additional locking pin hits a recess in the key, the core is blocked after the core has initially rotated, because the tumbler pin lying in the same plane of rotation can press into the additional locking pin bore. These known solutions are disadvantageous for several reasons: Due to the fact that the locking pins described above (additional locking pins, locking pins) are of different dimensions, not only is the number of possible locking variations due to different locking holes being equipped with locking pins, but a different one is required Occupation of a variety of different cores and housings (different spherical shapes in the inner wall due to the different locking pin tips), which leads to an extraordinarily extensive inventory. In addition, due to the fact that the locking pin bores are dimensioned smaller in diameter than the tumbler pins, the blocking is not guaranteed, which is evident, for. B. from Fig. DE-A-29 10 886 can be seen. The latching of the tumbler pin in question into the bore receiving the locking pin designated in that publication with 7 should indeed be guaranteed, but this requires an additional recess on the periphery of the core. In contrast, the engagement of a housing pin 15 in the bore 30 receiving the locking pin does not seem to be guaranteed because of the larger diameter of the housing pin 15.

From EP-A-0 029 498, namely FIGS. 8, 9 and 10 and the associated parts of the description, a rotary cylinder lock is known in which the tumbler pins 8 cooperate with the broad side of the flat key 43. In this case, a locking pin 53 parallel to the tumbler pins 8 is arranged in a transverse plane offset along the axis of the cylinder lock relative to the transverse plane offset from the tumbler pins 8 receiving the tumbler pins. This locking pin 53 is slidably guided with its shaft in a bore of the core and has a hemispherical head 53 'which is received by a countersink 54 in the outer peripheral surface of the core. The flat key 43 is provided at the point in contact with the locking pin 53 after the complete insertion into the key channel 10 ″ with a through-going bore 49 from broadside to broadside. This bore 49 receives a ball 19 which is transverse to the broad sides of the flat key 43 in the bore On the side of the key channel 10 ″ remote from the locking pin 53, a control pin 45 is inserted into the core, which protrudes with its end 45 ′ into the key channel 10 ″. When the flat key 43 is inserted into the key channel 10 ″, is the ball 19 between the facing ends of the stationary control pin 45 and the movable locking pin 53. Then and only then is the apex of the hemispherical head 53 'in the cylindrical peripheral surface of the cylinder core or - in other words - in the joint between the cylinder core and the cylinder housing . An additional spring-loaded housing pin 55 works together with the head 53 'of the locking pin 53, which locks the rotation of the core relative to the housing 1 "when the locking pin 53, for example as a result of the ball 19 being missing or as a result of the ball 19 being undersized immersed in the depression 54 that the parting line between the head 53 'of the locking pin 53 and the associated end of the additional housing pin 55 is no longer in the joint between the outer peripheral surface of the core and the inner peripheral surface of the housing bore, but within the recess 54.

Furthermore, a solution is known from FIGS. 14 and 15 of EP-A-0 029 498, which essentially corresponds to that according to FIGS. 8 to 10 there, but instead of the stationary control pin 45 a movable control pin has been taken, which also is under spring preload.

From CH-A-449 457, specifically from FIGS. 9 to 11, a rotary cylinder lock is known in which, in addition to the usual tumbler pin pairs 3, 5, two control pins 16, 17 are arranged in an axis-normal plane defined by such a tumbler pin pair, which interact with the side surfaces of the flat key and are matched to the target profile 14 of the flat key in such a way that when a profile-reduced flat key 15 is introduced, at least one tumbler pin 5 of the core 2 in the core bore of one or the other control pin 16 or 17 can fall in and thus prevent the core from rotating further. However, there is no interaction of the control pins with domes in the inner circumferential surface of the cylinder housing bore.

19 to 23 of the same patent, it is known to provide in addition to the usual tumbler pin pairs 3, 5 a cooperating with a side surface of the flat key control pin 11, 12, the housing pin 3 of the respective tumbler pin pair space for falling in when the cross section of the flat key 14 is reduced a milling 30, 31 granted on the outer peripheral surface of the core 2. This cutout is designed in such a way that, after the housing pin 3 has fallen into the cutout 31, 32, and then the core 2 has been turned back into the key insertion and removal position, it pushes the tumbler pin 3 on the housing side back into its housing bore.

The invention has for its object to increase the security of a rotary cylinder lock of the type described above with simple and inexpensive means, without the number of achievable locking variations being significantly reduced.

This object is achieved according to the teaching of claim 1. In the case of a rotary cylinder lock designed according to the invention, manipulation of the key is made considerably more difficult because the actually existing arrangement of the locking pins can hardly be ascertained without the disassembly of the rotary cylinder lock. A manipulation that e.g. to provide a complete wrench with the full number of calottes is therefore not suitable for opening the rotary cylinder lock, because with such manipulation the rotary cylinder lock is blocked after an initial rotation. This blocking occurs because after the initial rotation, tumbler pins inevitably dip into the locking pin bores due to the spring tension present and thereby displace the blind pins. If such a wrong key is used, the rotary cylinder lock is blocked.

In the embodiment according to the invention, the number of closure variations achievable by differently fitting the locking pin bores with locking pins or blind pins is only reduced in the case in which the complete number of locking pins is less than one. In such a case, this one locking pin bore is filled with a blind pin.

It is a very special advantage of the design according to the invention that a rotary cylinder lock of the generic type can be modified by a design according to the invention with only comparatively little processing effort, with the design according to the invention actually increasing the number of different parts by only one, namely the blind pins. The locking variations that can be achieved can therefore still be achieved by differently fitting locking pin bores with locking pins or blind pins.

In the case of a cylinder lock in which a multiplicity of locking pin bores lying next to one another is possible, it is of course advisable to always provide the locking pin bores in their entirety. In the case of so-called individually secured locks, in which a smaller number of locking variations are sufficient, this can lead to additional expenditure because not necessarily used locking pin holes have to be drilled and to be provided with blind pins, but the advantage of simplified storage outweighs them.

The embodiment according to claim 3 leads to the advantage that the blind pins protrude as far as the locking pins into the key channel. This further makes it more difficult to distinguish from the outside whether it is a locking or blind pin.

The rotary cylinder locks known from DE-A-20 03 059, according to the statements in DE-A-20 03 059, in particular page 12, last paragraph and page 13, have already been used in the context of locking systems with superordinate master keys, whereby To differentiate individual rotary cylinder locks within the locking system, the locking pins were varied in numbers and position.

The present invention is also based on the object of designing the rotary cylinder locks of the generic type in such a way that an additional possibility for obtaining locking variations is created. A rotary cylinder lock that complies with this requirement results from claim 4. Various arrangements of one or more modified blind pins result in a large number of locking variations in which the assignment of a higher-level key for at least two rotary cylinder locks is possible.

It is advisable to give the modified blind pin the shape of a locking pin head according to claim 5. Such a locking pin head is subject to the same conditions as the modified dummy pin.

It is advantageous to provide the same depth countersinks and the same locking pin heads, so that the same modified dummy pins can be used.

To secure the position of the modified blind pin or pins, it is expedient, in accordance with claim 7, to provide the modified blind pins with a shaft which dips into the locking pin bore. As a result, the modified blind pins are secured against tilting or tipping over.

The embodiment according to claim 8 leads to the advantage that when the rotary cylinder lock is closed with a wrong key, the rotary cylinder lock is blocked, but this blocking is to be removed again, ie the core has to be turned back again. This is made possible by cutouts according to the invention, which When turning the core back, ensure that the tumbler pins immersed in the locking pin holes or countersinks are lifted out.

The subsidiary claim 9 also solves the problem underlying the invention. An embodiment according to this claim differs from the embodiment according to claim 1 in that the locking pin bores and the tumbler pin bores are not in the same transverse plane, that is to say the tumbler pins cannot dip into the locking pin bores or counterbores if an incorrect key is present. The blocking takes place here by the presence of at least one recess according to the invention, into which the tumbler pin in question is able to dip. The tumbler pin in question can also be automatically lifted out of this recess when the core is turned back.

Claim 4 is to be given independent inventive significance, since a corresponding configuration is also advantageous independently of the main claim. This is illustrated by the word in particular in the preamble of claim 4.

The invention also relates to a locking system which is constructed from rotary cylinder locks according to claim 4, with possibilities of the locking variation between individual locks of such a locking system being specified in claim 10.

Finally, the invention relates, according to claim 11, to a key for a rotary cylinder lock, the profile of which is selected such that the blind pins align with the periphery of the core.

• Fig. 1 ein erfindungsgemäss ausgestaltetes Drehzylinderschloss im Querschnitt,
• Fig. 2 eine Gegenüberstellung der vorhandenen Sperr- und Blindstifte eines Drehzylinderschlosses, das zu einer Schliessanlage gehört (zweites Ausführungsbeispiel) und
• Fig. 3 eine beispielhafte Anordnung der vorhandenen Sperr- und Blindstifte eines Drehzylinderschlosses, das zu einer Schliessanlage gehört.

Two exemplary embodiments of the invention are described in more detail below on the basis of a simplified drawing. Show it:

• 1 shows a rotary cylinder lock designed according to the invention in cross section,
• Fig. 2 is a comparison of the existing locking and blind pins of a rotary cylinder lock that belongs to a locking system (second embodiment) and
• Fig. 3 shows an exemplary arrangement of the existing locking and blind pins of a rotary cylinder lock that belongs to a locking system.

1, a rotary cylinder lock is shown, the housing 1 has a so-called Hahn profile. The associated key is designated by 2 and is received in a key channel 3 in the core 4, the key channel 3 being profiled in the sense of the longitudinal grooves 6 introduced into the broad sides 5 of the key 2. The thickness of the key 2 is scanned by conventional locking pins 7, which can be arranged along the axis of rotation 8 of the core 4 in a row or also offset from one another. So-called domes 12 and 11 are provided in the key 2 and in the inner wall 9 of the housing 1. The calotte 11 has the purpose, on the one hand, of receiving the head 13 of the locking pin 7 when the key 2 is inserted, as shown in FIG. 1. On the other hand, it is the purpose of the calotte 11 to insert the locking pin 7 into the calotte 12 when the core 4 is rotated. A locking pin 7 pushed into the calotte 12 closes on the outside with the periphery 14 of the core 3, so that its rotation is ensured.

In the exemplary embodiment to be described, a row of locking pin bores 15 is provided on each side of the key 2, which on the outside merge into depressions 16 for possibly accommodating a plurality of locking pin heads 13.

In the same transverse plane there are usual incisions 17 in the key 2 scanning tumbler pins 18, 19 which are longitudinally displaceable in tumbler pin bores 21, 22 and, with a suitable key 2, align with the periphery 14 of the core 4 or with the inner wall 9 of the housing 1. The tumbler pins 18 are under a spring tension 23, which she tries to insert into the incisions 17. A plurality of tumbler pin bores 21, 22 are arranged along the axis of rotation 8 in a row or offset from one another. The tumbler pin bores 21, 22 and the locking pin bores 15, however, each lie in a transverse plane.

The diameter D of the countersinks 16 is dimensioned equal to or larger than the diameter d of the tumbler pins 18, 19 or the tumbler pin bores 21, 22.

In the cross pin bores 15, which are not assigned to a dome 12 in the key 2 and no locking pin 7, blind pins 24 are inserted, the heads 25 of which terminate at the periphery 14 of the core when they rest on the broad side 5 of the key 2. As can best be seen from FIG. 2, the height h of the head 25 of a blind pin 24 is dimensioned less than the height H of the locking pin head 13. Since the depth t of the depressions 16 is the same, a blind pin head 25 can consequently dive deeper so that e.g. in the presence of a spherical cap in front of a blind pin 24 (wrong key) when the core is turned in the direction of arrow 26, the tumbler pin 18 is immersed in the depression 16 receiving the blind pin 24 and blocks further turning. The turning back of the core 4, on the other hand, is ensured by recesses 27 which are arranged at the outlet of the depressions 16, run secantially towards the tumbler pins 18 and lift the tumbler pins 18 in question out of the immersion position. A recess 27 is therefore dimensioned at least as wide as the diameter d of the tumbler pin 18. Each recess 16 is assigned such a recess 27.

As can be clearly seen from FIG. 2, the shaft 29 of the blind pin 24 and the shaft 28 of the locking pin 7 are of the same length (L).

Rotary cylinder locks designed according to the invention can also be used advantageously for locking systems. A locking system is shown by way of example in the figure, which comprises two rotary cylinder locks 31, 32 with associated individual keys 33, 34 and a superordinate key 35 which fits both rotary cylinder locks 31, 32. To the desired To achieve ten locking variations when the superordinate key 35 is present, the individual key 33 does not have a cap 12 at 36 and the key 34 at the position designated 37, while the key 35 has caps 12 at these points.

In order to prevent the tumbler pins 18 from engaging in the recesses 16 corresponding to the positions 36 and 37 after an initial rotation of the rotary cylinder lock 31 or 32 with the superordinate key 35, the modified blind pins 38 are arranged in these recesses 16, the heads 39 of which are like 2 clearly shows - have the same height H as the locking pin heads 13, but the length of which is not greater than the corresponding distance a between the broad side 5 of the key and the periphery of the core. In the exemplary embodiment, the total length of the modified dummy pins 38 corresponds to the total length of the dummy pins 24. Consequently, the shaft 41 of each modified dummy pin 38 is shorter than the length L of the shafts 28, 29.

In the above-described exemplary embodiments, four locking pin bores 15 or counterbores 16 are arranged one behind the other. Within the scope of the invention, however, the advantages which can be achieved by the invention can already be achieved if two locking pin bores 15 or counterbores 16 are arranged one behind the other.

Claims (11)

1. Rotary cylinder lock comprising an associated key (2), especially a flat key with longitudinal slots made in its rectangular basic profile, a housing (1) especially in the form of a cock profile, an a cylindrical core (4), in which there are, transversely relative to the plane or planes passing through the tumbler pins (18, 19), detentpin bores (15) of the same diameter for receiving springless detent pins (7) wihich are provided with heads (13) facing away from the key and which are received in counter-sinks (16) of the same depth made in the periphery (14) of the core, a cup (11) or the like being assigned in the inner wall of the housing to each of the detent-pin bores (15), and a cup (12) or the like being assigned, in the wide side of the flat key, to at least one of these detent-pin bores for the respective detent pins (7), characterised in that the detent-pin bores (15) each lie, at least on the outer periphery (14) of the core (4), in the transverse plane of a tumbler pin (18) in relation to the rotary cylinder lock, the diameters (D) of the countersinks (16) are equal to or greater than the diameters (d) of the tumbler pins (18), and there are arranged in the detent-pin bore or bores (15), to which no cups (12) are assigned in the wide side (5) of the key (2), dummy pins (24) which, when they come up against the wide side (5) of the key (2), are flush with the periphery (14) of the core (4), the heads (25) of the dummy pins (24) being made lower (h) than the heads (13) of the detent pins (7).

2. Rotary cylinder lock according to Claim 1, characterised in that, in a rotary cylinder lock with more than two possible detent-pin bores (15), there is a full complement of detent-pin bores (15).

3. Rotary cylinder lock according to Claim 1 or 2, characterised in that the shank length (1) of the dummy pins (24) is equal to the shank length (1) of the detent pins (7).

4. Rotary cylinder lock, especially according to one or more of the preceding claims, comprising an associated key (2), especially a flat key with longitudinal slots made in its rectangular basic profile, a housing (1) especially in the form of a cock profile, and a cylindrical core (4), in which there are, transversely to the plane or planes passing through the tumbler pins, detent-pin bores (15) of the same diameter for receiving springless detent pins (7) which are provided with heads (13) facing away from the key and which are received in countersinks (16) of the same depth made in the periphery (14) of the core, a cup (11) or the like being assigned in the inner wall of the housing to each of the detent-pin bores (15), and a cup (12) or the like being assigned, in the wide side of the flat key, to at least one of these detent- pin bores for the respective detent pins (7), characterised in that the detent-pin bores (15) each lie, at least on the outer periphery (14) of the core (4), in the transverse plane of a tumbler pin (18) in relation to the rotary cylinder lock, and the diameters (D) of the countersinks (16) are equal to or greater than the diameters (d) of the tumbler pins (18), and in that, to make it possible to obtain different detent-pin arrangements (Figure 3) when a master key (35) is assigned, there is, if appropriate, in at least one detent-pin bore (15) or detent- pin countersink (16) a modified dummy pin (38) which is flush with the periphery (14) of the core (4) and which is prevented from penetrating further into the core (4).

5. Rotary cylinder lock according to Claim 4, characterised in that the modified dummy pin (38) has the form of a detent-pin head (13).

6. Rotary cylinder lock according to Claim 4 or 5, characterised in that the countersinks (16) are made with the same depth, and when several modified dummy pins (38) are provided these are of identical design.

7. Rotary cylinder lock according to one or more of Claims 4 to 6, characterised in that the modified dummy pin (38) penetrates by means of a shank (41) into the detent-pin bore (15) an amount which is equal to or less than the distance (k) between the wide side (5) of the key (2) and the countersink (16).

8. Rotary cylinder lock according to one or more of the preceding claims, characterised in that assigned to the countersinks (16) are recesses (27) on one side, which lie in the transverse plane of the tumbler-pin bores (21) and taper out approximately in the form of a secant towards the tumbler-pin bores (21), and the width of which is equal to or greater than the diameter (d) of the tumbler pins (18).

9. Rotary cylinder lock according to the precharacterising clause of Claim 1, characterised in that the detent-pin bores (15) and the tumbler-pin bores (21) are arranged in such a way that they intersect at least partially in the plane of rotation of the rotary cylinder lock, there are arranged in the detent-pin bores (15), to which no cups (12) are assigned in the wide side (5) of the key (2), dummy pins (24) which, when they come up against the wide side (5) of the key (2), are flush with the periphery (14) of the core (4), and assigned to the detent-pin bores (15) or detent-pin countersinks (16) on the periphery (14) are recesses (27) on one side, which are arranged in the transverse plane of the tumbler pins (18) and are each at least as wide as the diameter (d) of the latter and which taper out approximately in the form of a secant towards the tumbler-pin bores (21).

10. Closing system with rotary cylinder locks according to Claim 4, characterised in that a first rotary cylinder lock (31) in a first detent-pin position has a modified dummy pin (38) and the individual key (33) of the first rotary cylinder lock (31) es made without a cup at the location (36) corresponding to the first detent-pin position, and the second rotary cylinder lock (32) in a second detent-pin position has a modified dummy pin (38) and the individual key (34) of the second rotary cylinder lock (32) is made without a cup at the location (37) corresponding to the second detent- pin position, and in that a master key (35) common to the two rotary cylinder locks (31, 32) is made with a cup (12) at each of the locations corresponding to the two detent-pin positions.

11. Flat key for a rotary cylinder lock according to one of Claims 1 to 10, with longitudinal slots made in its rectangular basic profile, at least one wide side (5) being intended for receiving cups (12), characterised in that the level of this wide side is set so that the dummy pins, when they come up against intact regions of this wide side (5), are flush with the periphery (14) of the core (4).

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