Cylinder lock system and method for adjusting a cylinder lock subassembly

Abstract

Cylinder lock system comprising a cylinder lock subassembly, wherein the cylinder lock subassembly comprises a housing, a cylinder accommodated in the housing, and at least one cylinder locking device, wherein the cylinder locking device is configured in one or more locking positions to prevent a rotation of the cylinder relative to the housing about a cylinder axis of the cylinder, and is configured in a release position to allow the rotation, wherein the cylinder lock subassembly is configured to normally maintain the cylinder locking device in one of the locking positions, and to receive a matching operating key into a key opening of the cylinder from a front end of the cylinder to thereby allow the cylinder locking device to move to the release position, characterized in that the cylinder lock system comprises an adjustment key configured to be inserted into the key opening from a rear end of the cylinder opposite the front end and to thereby move the at least one cylinder locking device to the release position.

Description

[0001] Title: Cylinder lock system and method for adjusting a cylinder lock subassembly

[0002] FIELD

[0003] The invention relates to a cylinder lock system comprising a cylinder lock subassembly, as well as to a method for adjusting the cylinder lock subassembly.

[0004] BACKGROUND

[0005] Adjustable cylinder lock subassemblies comprising a housing, a cylinder accommodated in the housing, and cylinder locking devices are known per se. Known adjustable cylinder lock subassemblies can be adjusted to allow a cylinder lock assembly, of which the cylinder lock subassembly can be a part, to cooperate with more, fewer, or different keys for operating the cylinder lock assembly. Thus, a so-called master key system can be implemented, whereby some keys can unlock only one or some doors of a building or building section, while one or some other keys can unlock, for example, all doors of the respective building or building section, and whereby some doors can be unlocked with only one or some keys, while one or some doors can be unlocked by all keys from the master key system, for example. Thus, access to different spaces in a building or building section can be set substantially as desired by adjusting cylinder lock subassemblies, particularly without users needing a large number of keys for extensive access. To further facilitate the implementation of master key systems, there is a need for simplification of such adjustments of cylinder lock subassemblies.

[0006] SUMMARY

[0007] An objective of the invention is to facilitate adjustment of cylinder lock subassemblies, particularly to thereby facilitate the implementation of master key systems. An aspect of the invention provides a cylinder lock system comprising a cylinder lock subassembly. The cylinder lock subassembly comprises a housing, a cylinder accommodated in the housing, and at least one cylinder locking device. The at least one cylinder locking device is configured in one or more locking positions to prevent a rotation of the cylinder relative to the housing about a cylinder axis of the cylinder, and is configured in a release position to allow the rotation. The cylinder lock subassembly is configured to normally maintain the at least one cylinder locking device in one of the locking positions, and to receive a matching operating key into a key opening of the cylinder from a front end of the cylinder to thereby allow the at least one cylinder locking device to move to the release position.

[0008] The cylinder lock system comprises an adjustment key configured to be inserted into the key opening from a rear end of the cylinder opposite the front end and to thereby move the at least one cylinder locking device to the release position.

[0009] A further aspect provides a method for adjusting a cylinder lock subassembly. The method comprises: providing a cylinder lock system as described herein; inserting the adjustment key into the key opening from the rear end of the cylinder and thereby moving the at least one cylinder locking device to the release position; adjusting the cylinder lock subassembly after the at least one cylinder locking device has been moved to the release position by inserting the adjustment key; and preferably removing the adjustment key from the key opening after the adjusting.

[0010] By using such an adjustment key, the cylinder lock subassembly can advantageously be adjusted without using any operating key when the rear end of the cylinder is accessible, such as prior to coupling the cylinder to a cam. This can particularly facilitate adjustment of the cylinder lock subassembly near the front end of the cylinder. In known cylinder lock systems, adjusting a cylinder lock subassembly at the front end of the cylinder typically first requires inserting a matching operating key from the front end into the cylinder to release the cylinder relative to the housing. Since the presence of the operating key can then obstruct adjustments at the front end of the cylinder, the operating key must be removed after releasing, which in turn typically requires the cylinder to be largely removed from the housing due to a blocking action of the at least one cylinder locking device. The at least one cylinder locking device, for example, includes a respective at least one combination of key pin, driver pin, and spring, particularly one or more series of such combinations arranged along the cylinder axis, as is customary for cylinder lock subassemblies as such. To remove the operating key from the cylinder, the key pins must be able to extend partially outside the cylinder, which is typically not possible if the cylinder is within the housing at the location of the respective key pin without being aligned with the openings in the housing where the driver pins are located. When the cylinder is largely or entirely removed from the housing, the key pins and driver pins can typically become so easily dislodged that great care is required, and even with great care, the risk of unintended dislodging remains real, which then forces further efforts to restore the cylinder lock subassembly to a properly working condition.

[0011] Such difficulties are advantageously removed by use of the adjustment key. By being insertable from the rear end of the cylinder, the cylinder can be substantially left free at the front end for making adjustments, such as in the context of implementing a master key system. Thus, the adjustment key can remain in the cylinder during such an adjustment, allowing in turn the cylinder to remain largely in the housing so that the key pins and driver pins, or more generally the at least one cylinder locking device, have little or no risk of unintended dislodging. More generally, use of the adjustment key offers the advantage of providing an alternative method for adjusting a cyhnder lock subassembly, thereby increasing design and usage possibilities.

[0012] Optional further embodiments of the mentioned aspects are provided by the content of the dependent claims, as explained in the following detailed description.

[0013] DETAILED DESCRIPTION

[0014] The invention is further explained below using descriptions of embodiments and drawings. The drawings are schematic and merely show examples of embodiments. The descriptions of embodiments can also be understood without the drawings, and the described embodiments can be combined with each other except where the contrary is evident. In the drawings, corresponding elements are indicated with corresponding reference signs.

[0015] In the drawings, shows:

[0016] Figs. 1A, 2A, and 3A respectively a perspective view, a further perspective view, and a top view of a cylinder lock system with a cylinder in a first cylinder position;

[0017] Figs. IB, 2B, and 3B respectively a perspective view, a further perspective view, and a side view of the cylinder lock system with the cylinder in a second cylinder position;

[0018] Figs. 4A and 4B a front view of the cylinder lock system, with the adjustment key respectively not shown and shown;

[0019] Figs. 5 and 6 respectively a front view and a top view of a distal portion of the adjustment key;

[0020] Figs. 7 and 8 respectively a perspective view and a side view of the adjustment key;

[0021] Figs. 9, 10, and 11 respectively a perspective view, a further perspective view, and a top view of the cylinder; Figs. 12 and 13 respectively a perspective view and a further perspective view of a set of constriction elements for the cylinder lock subassembly;

[0022] Figs. 14 and 15 respectively a top view and a perspective view of the cylinder, with one of the constriction elements shown outside the cylinder in a position from which the constriction element can be slid into a constriction element receiving space of the cylinder;

[0023] Figs. 16 a perspective view of a combination of the cylinder and the constriction element, with the constriction element received in the constriction element receiving space, wherein the combination is sectioned along a longitudinal plane, transparently showing parts of cylinder locking devices of the cylinder lock subassembly; and

[0024] Fig. 17 a perspective view of a cylinder lock assembly, comprising two instances of the cylinder lock subassembly with a cam and a bridge in between.

[0025] The figures illustrate an example of a cylinder lock system 1 comprising a cylinder lock subassembly 2. The cylinder lock subassembly 2 comprises a housing 3, a cylinder 4 accommodated in the housing 3, and at least one cylinder locking device 5. The cylinder lock subassembly 2 can be of a type that is known as such.

[0026] The at least one cylinder locking device 5 is configured in one or more possible locking positions to prevent a rotation of the cylinder 4 relative to the housing 3 about a cylinder axis C of the cylinder 4, and is configured in a release position to allow the rotation. The cylinder lock subassembly 2 is configured to normally maintain the at least one cylinder locking device 5 in one of the locking positions, particularly under a bias. The cylinder lock subassembly 2 is configured to receive a matching operating key into a key opening 7 of the cylinder 4 from a front end 6 of the cylinder 4 to thereby allow the at least one cylinder locking device 5 to move to the release position, particularly against the bias. The cylinder lock system 1 comprises an adjustment key 8 configured to be inserted into the key opening 7 from a rear end 9 of the cylinder 4 opposite the front end 6 and to thereby move the at least one cylinder locking device 5 to the release position.

[0027] The figures further illustrate a method for adjusting a cylinder lock subassembly 2, comprising: providing a cylinder lock system 1 as described herein; inserting the adjustment key 8 into the key opening 7 from the rear end 9 of the cylinder 4, and thereby moving the at least one cylinder locking device 5 to the release position; adjusting the cylinder lock subassembly 2 after the at least one cylinder locking device 5 has been moved to the release position by inserting the adjustment key 8; and removing the adjustment key 8 from the key opening 7 after the adjusting.

[0028] The at least one cylinder locking device 5 can be of a type known as such and in embodiments, including in the example of Fig. 16, comprises for each cylinder locking device 5 a respective key pin 5a and a respective driver pin 5b, and preferably a respective biasing element (not shown), as is as such customary for cylinder lock subassemblies. In Fig. 16, for clarity of the figure, for only one of the six cylinder locking devices 5 shown the key pin 5a and the driver pin 5b are provided with a reference sign. In Fig. 16, the key pins 5a and driver pins 5b for different cylinder locking devices 5 are shown with a same length in the radial direction relative to the shown axis C. However, it should be clear that such lengths can typically differ for different ones of the cylinder locking devices 5, so that a relatively specific combination can be provided for relatively specific cooperation with a corresponding longitudinal bitting 18 (also known as ‘key cutting’) of matching keys. In Fig. 8, such a longitudinal bitting 18 for the adjustment key 8 is indicated with a dashed line that can be considered as a possible cut line. In other figures, the adjustment key 8 is shown without such longitudinal bitting for simplicity of the drawings, although it should nevertheless be clear that many different bittings can be applied, essentially as is as such customary for operating keys to make the respective key suitable for cooperation with the cylinder locking devices 5. As an addition or alternative to cylinder locking devices 5 positioned along one or both narrow sides of the key opening 7, cylinder locking devices can optionally be positioned along one or both wide sides of the key opening 7, in which case a corresponding bitting can be formed on a corresponding wide side of a matching key, which is also known as such for cylinder lock systems. The operating key can be of a type that is known as such.

[0029] In embodiments, including in the shown examples, the adjusting of the cylinder lock subassembly 2 concerns an accessibility of the key opening 7 for the operating key via the front end 6. Thus, a master key system can effectively be implemented by configuring different cylinder lock subassemblies 2 differently regarding such accessibility.

[0030] In embodiments, including in the shown examples, a constriction element receiving space 12 is formed in the cylinder 4 for receiving a constriction element 13 therein in a transverse direction T relative to the cylinder axis C, wherein the constriction element receiving space 12 at least partially intersects the key opening 7, wherein the constriction element 13 is at least selectively configured, when received, to locally constrict the key opening 7, particularly to limit possible shapes such as possible transverse profiles of the matching operating key. In embodiments, including in the shown examples, the adjustment comprises inserting the constriction element 13 into the constriction element receiving space 12, or removing the constriction element 13 from the constriction element receiving space 12. In embodiments, including in the shown examples, the cylinder lock system 1 further comprises the constriction element 13. In embodiments, including in the shown examples, the constriction element 13 is part of a set 19 of mutually different constriction elements 13 that can selectively be used as the constriction element 13, wherein the cylinder lock system 1 comprises the set 19 of constriction elements 13. Thus, the accessibility of the key opening 7 can effectively be adjusted, particularly in a relatively easy manner using a constriction element 13 that can, for example, be chosen from a set 19, and moreover without necessarily requiring an adjustment of the at least one cylinder locking device 5.

[0031] A passage formed in the constriction element 13 can, for example, either or not together with a passage formed in the key opening 7 itself, determine a transverse profile passage shape within which a transverse profile of the operating key must fit to be effectively received in the key opening 7. In relation thereto, the thus determined transverse profile passage shape can be narrowed in one or more areas relative to a passage profile of the key opening 7 itself. Nevertheless, the set 19 of constriction elements 13 can optionally include one or more selectable constriction elements that, when received, do not constrict the key opening 7 relative to an own passage profile of the key opening 7 itself. A passage profile of such a constriction element can, for example, correspond to the own passage profile of the key opening 7, and thus continue the mentioned own passage profile in the constriction element receiving space 12, particularly to counteract misuse of an empty constriction element receiving space 12. In this sense, the constriction elements 13 of the set 19 are at least selectively, that is, depending on the chosen constriction element 13, configured to, when received, locally constrict the key opening 7.

[0032] Regardless of its precise shape, the constriction element 13, when received, can advantageously form a barrier against misuse such as drilling out the cylinder 4, for example when the constriction element 13 is made of hardened steel.

[0033] In embodiments, including in the shown examples, along the cylinder axis C, the constriction element receiving space 12 is between the front end 6 and the at least one cylinder locking device 5. Thus, the constriction element 13 can effectively limit access to the at least one cylinder locking device 5 for operating keys. Moreover, a second cylinder position II, further explained elsewhere herein, can thus be obtained in which the constriction element 13 can be moved into or out of the constriction element receiving space 12 substantially without risk of disengagement of the at least one cylinder locking device 5.

[0034] In embodiments, including in the shown examples, the constriction element 13 is substantially U-shaped with legs 14 configured to extend along lateral opposite sides of the key opening 7. Here, lateral opposite sides refer to the long sides of an elongated transverse shape of the key opening 7, as will be clear from the figures as examples. With such a U-shape, the constriction can be particularly effectively realized, particularly with a single constriction element 13 and for a key opening 7 that opens outwardly from a radial outer side of the cylinder 4.

[0035] In embodiments, including in the shown examples, the cylinder lock system is configured to allow the cylinder 4 to be movable relative to the housing 3 along the cylinder axis C from a first cylinder position I to a second cylinder position II to move the front end 6 away from the housing 3 when the at least one cylinder locking device 5 has been moved to the release position by inserting the adjustment key 8. Thus, the cylinder 4 can be made easily accessible along an axial end section at the front end 6 of the cylinder 4 for adjustment, particularly to move the constriction element 13 into or out of the constriction element receiving space 12. In the figures, as example, such a first cylinder position I is shown in Figs. 1A, 2A, 3A, while such a second cylinder position II is shown in Figs. IB, 2B, and 3B. After the adjustment, the cylinder 4 can be moved back to the first cylinder position I. In embodiments, including in the shown examples, the method thus comprises moving the cylinder 4 relative to the housing 3 from the first cylinder position I to the second cylinder position II, wherein the adjustment is performed while the cylinder 4 is in the second cylinder position II, wherein the cylinder 4 is preferably moved back to the first cylinder position I after the adjustment. In embodiments, including in the shown examples, the constriction element receiving space 12 is closed by the housing 3 in the first cylinder position I, wherein the constriction element receiving space 12 is released by the housing 3 in the second cylinder position II to allow the constriction element 13 to be moved into or out of the constriction element receiving space 12. Thus, in the second position II, the cylinder lock subassembly 2 can be adjusted using the constriction element 13 and the adjustment key 8, while during normal use, the constriction element 13 is locked in.

[0036] In embodiments, including in the shown examples, the adjustment key 8 comprises a first stop 10 configured for cooperation with the cylinder 4 to limit an insertion distance of the adjustment key 8 into the cylinder 4. Thus, it can be prevented that the adjustment key 8, by being inserted too far, could complicate an exchange of the constriction element 13. Moreover, the cylinder 4 can advantageously be partially moved out of the housing 3 by manually pushing the adjustment key 8 while the housing 3 is held, for example, with another hand.

[0037] In embodiments, including in the shown examples, the cylinder lock system 1 is configured to limit the said movability of the cylinder 4 relative to the housing 3, particularly to the second cylinder position II from the first cylinder position I and / or via one or more predetermined intermediate positions, to prevent disengagement and / or jamming of the at least one cylinder locking device 5. Thus, ease of use in adjusting the cylinder lock subassembly 2 can be further promoted. It should be clear that the cylinder 4 can still be completely removed from the housing 3 if desired using a matching operating key, as is as such customary for cylinder lock systems.

[0038] In embodiments, including in the shown examples, the adjustment key 8 comprises a second stop 11 configured for cooperation with the housing 3, particularly in the second cylinder position II, to limit the movability. Thus, the limitation of the movability can be realized in a relatively simple yet effective manner.

[0039] In embodiments, including in the shown examples, the cylinder 4 in the second cylinder position II compared to the first cylinder position I is rotated about the cylinder axis C relative to the housing 3, preferably by an angle in the range of 30 to 150 degrees, more preferably by an angle in the range of 60 to 120 degrees, for example, about 90 degrees. In embodiments, including in the shown examples, the housing 3 is configured to limit, in cooperation with the second stop 11, an insertion distance of the adjustment key 8 into the housing 3 in dependence of a rotational position of the adjustment key 8 relative to the housing 3 about the cylinder axis C. In embodiments, including in the shown examples, the housing 3 at its rear end 9 comprises an axial recess 21 (see Figs. 2A-B) at a circumferential position corresponding to a rotational position of the adjustment key 8 in the second cylinder position II, particularly to determine a predetermined intermediate position in which the cylinder 4 is rotated but not yet shifted relative to the housing 3 from the first cylinder position I, wherein the second cylinder position II is only reachable from the first cylinder position I via that intermediate position. Thus, from the first cylinder position I, a shift of the cylinder 4 relative to the housing 3 can be limited when the rotational position of the adjustment key 8 does not correspond to the second cylinder position II, particularly to prevent jamming of the at least one cylinder locking device 5 by mere shifting from the first cylinder position I.

[0040] In embodiments, including in the shown examples, the cylinder 4 can thus be moved from the first cylinder position I to the second cylinder position II by successively: inserting the adjustment key 8 from the rear end 9 into the key opening 7 to thereby move the at least one cylinder locking device 5 to the release position, wherein the second stop 11 initially prevents shifting of the cylinder 4 relative to the housing 3; rotating the inserted adjustment key 8, and thereby the cylinder 4, relative to the housing 3 about the cylinder axis C to an intermediate position in which the rotational position of the adjustment key 8 corresponds to the second cylinder position II and in which the second stop 11 is aligned with the axial recess 21; shifting the inserted adjustment key 8, and thereby the cylinder

[0041] 4, relative to the housing 3 along the cylinder axis C from the intermediate position to the second cylinder position II, wherein the second stop 11 is received in the axial recess 21 and there prevents both shifting beyond the second cylinder position II and rotation about the cylinder axis C, and wherein the first stop 10 allows the shifting of the adjustment key 8 to be transferred to the cylinder 4. To subsequently move the cylinder 4 from the second cylinder position II back to the first cylinder position I, the above method can essentially be reversed. The cylinder 4 is preferably configured at its front end 6 to limit the backward shifting of the cylinder 4 relative to the housing 3 from the second cylinder position II to the first cylinder position I, for example, because the cylinder 4 is widened at its front end 6, as is as such customary.

[0042] In embodiments, including in the shown examples, the adjustment key 8 is shaped to be able to extend through the local constriction of the constriction element 13 in the key opening 7. To this end, the adjustment key is, for example, narrowed along a distal end section 20 thereof, particularly to a transverse profile that fits within the passages of all constriction elements 13 from the set 19. Thus, the constriction element 13 can be moved into or out of the constriction element receiving space 12 from at least one side while the adjustment key 8 is inserted into the cylinder 4. Alternatively, the adjustment key 8 can optionally be shortened compared to the shown example, to overlap less or not axially with the constriction element receiving space 12. It is then important that the adjustment key 8 is still long enough for cooperation with each of the cylinder locking devices

[0043] 5. In embodiments, including in the shown examples, the adjustment key 8 is configured to be unusable as the operating key for the cylinder lock subassembly 2. Thus, the adjustment key 8 can be provided relatively safely, without requiring special additional measures to prevent unauthorized access to locked spaces.

[0044] In embodiments, including in the shown examples, the key opening 7 has an asymmetric transverse profile at at least one position along the cylinder axis C. In embodiments, including in the shown examples, the cylinder lock subassembly 2 has an asymmetric configuration along the cylinder axis C with respect to the at least one cylinder locking device 5. Such asymmetry can promote that the adjustment key 8 is not usable as an operating key.

[0045] In embodiments, including in the shown examples (see e.g. Fig. 17), the cylinder 4 is configured to be coupled at its rear end 9 with a cam 15 for operating a bolt via the cylinder lock subassembly 2 using the operating key. Thus, one or two instances of the cylinder lock subassembly 2 can be incorporated as part of a cylinder lock assembly 17 in an as such customary manner, wherein advantageously the rear end 9 is made inaccessible and the cylinder 4 is held in the first cylinder position I, so that unauthorized adjustments to the cylinder lock subassembly 2 are prevented from then onward and the cylinder lock assembly 17 can thus be used for access security, particularly in the context of a master key system depending on the included constriction element 13 and / or any other adjustments prior to coupling the cam 15.

[0046] Although the invention is explained herein with reference to descriptions of embodiments and drawings, these do not limit the scope of the invention as determined by the claims. Within said scope, many variations are possible. For example, a cylinder lock subassembly compared to the shown example can comprise a different number and / or a different type of cylinder locking devices. More generally, known variations of cylinder lock subassemblies in principle remain applicable in combination with the features described herein regarding the adjustment key, the constriction element receiving space, and the constriction element.

[0047] LIST OF REFERENCE SIGNS

[0048] 1. Cylinder lock system

[0049] 2. Cylinder lock subassembly

[0050] 3. Housing

[0051] 4. Cylinder

[0052] 5. Cylinder locking device

[0053] 5a. Key pin

[0054] 5b. Driver pin

[0055] 6. Front end

[0056] 7. Key opening

[0057] 8. Adjustment key

[0058] 9. Rear end

[0059] 10. First stop

[0060] 11. Second stop

[0061] 12. Constriction element receiving space

[0062] 13. Constriction element

[0063] 14. Leg

[0064] 15. Cam

[0065] 16. Bridge

[0066] 17. Cylinder lock assembly

[0067] 18. Longitudinal bitting

[0068] 19. Set of constriction elements

[0069] 20. Distal end section

[0070] 21. Axial recess

[0071] C. Cylinder axis

[0072] T. Transverse direction

[0073] I. First cylinder position

[0074] II. Second cylinder position

Claims

CLAIMS1. Cylinder lock system (1) comprising a cylinder lock subassembly (2), wherein the cylinder lock subassembly (2) comprises a housing (3), a cylinder (4) accommodated in the housing (3), and at least one cylinder locking device (5), wherein the at least one cylinder locking device (5) is configured in one or more locking positions to prevent a rotation of the cylinder (4) relative to the housing (3) about a cylinder axis (C) of the cylinder (4), and is configured in a release position to allow the rotation, wherein the cylinder lock subassembly (2) is configured to normally maintain the at least one cylinder locking device (5) in one of the locking positions, and to receive a matching operating key into a key opening (7) of the cylinder (4) from a front end (6) of the cylinder (4) to thereby allow the at least one cylinder locking device (5) to move to the release position, characterized in that the cylinder lock system (1) comprises an adjustment key (8) configured to be inserted into the key opening (7) from a rear end (9) of the cylinder (4) opposite the front end (6) and to thereby move the at least one cylinder locking device (5) to the release position.

2. Cylinder lock system according to claim 1, configured to allow the cylinder (4) to be movable relative to the housing (3) along the cylinder axis (C) from a first cylinder position (I) to a second cylinder position (II) to move the front end (6) away from the housing (3) when the at least one cylinder locking device (5) has been moved to the release position by inserting the adjustment key (8).

3. Cylinder lock system according to claim 2, wherein the adjustment key (8) comprises a first stop (10) configured for cooperation with the cylinder (4) to limit an insertion distance of the adjustment key (8) into the cylinder (4).

4. Cylinder lock system according to claim 2 or 3, wherein the cylinder lock system (1) is configured to limit the said movability to prevent disengagement and / or jamming of the at least one cylinder locking device (5).

5. Cylinder lock system according to claim 4, wherein, for limiting the movability, the adjustment key (8) comprises a second stop (11) configured to cooperate with the housing (3).

6. Cylinder lock system according to claim 5, wherein the housing (3) is configured to limit, in cooperation with the second stop (11), an insertion distance of the adjustment key (8) into the housing (3) in dependence of a rotational position of the adjustment key (8) relative to the housing (3) about the cylinder axis (C).

7. Cylinder lock system according to any of claims 2 - 6, wherein, in the second cylinder position (II) compared to the first cylinder position (I), the cylinder (4) is rotated about the cylinder axis (C) relative to the housing(3), preferably by an angle in the range of 30 to 150 degrees, more preferably by an angle in the range of 60 to 120 degrees, for example about 90 degrees.

8. Cylinder lock system according to any of the preceding claims, wherein a constriction element receiving space (12) is formed in the cylinder(4) for receiving therein a constriction element (13) in a transverse direction (T) relative to the cylinder axis (C), wherein the constriction element receiving space (12) at least partially intersects the key opening (7), whereinthe constriction element (13) is at least selectively configured, when received, to locally constrict the key opening (7), in particular to hmit possible shapes of the matching operating key.

9. Cylinder lock system according to claims 2 and 8, wherein the constriction element receiving space (12) is closed by the housing (3) in the first cylinder position (I), wherein the constriction element receiving space (12) is released by the housing (3) in the second cylinder position (II) to allow the constriction element (13) to be moved into or out of the constriction element receiving space (12).

10. Cylinder lock system according to claim 8 or 9, wherein, along the cylinder axis (C), the constriction element receiving space (12) is between the front end (6) and the at least one cylinder locking device (5).

11. Cylinder lock system according to any of claims 8 - 10, wherein the constriction element (13) is substantially U-shaped with legs (14) configured to extend along lateral opposite sides of the key opening (7).

12. Cylinder lock system according to any of claims 8 - 11, wherein the adjustment key (8) is shaped to be able to extend through the local constriction of the constriction element (13) in the key opening (7).

13. Cylinder lock system according to any of claims 8 - 12, further comprising the constriction element (13).

14. Cylinder lock system according to any of claims 8 - 13, wherein the constriction element (13) is part of a set of mutually different constriction elements (13) that can selectively be used as the constriction element (13),wherein the cylinder lock system (1) comprises the set of constriction elements (13).

15. Cylinder lock system according to any of the preceding claims, wherein the key opening (7) has an asymmetric transverse profile at at least one position along the cylinder axis (C).

16. Cylinder lock system according to any of the preceding claims, wherein, with respect to the at least one cylinder locking device (5), the cylinder lock subassembly (2) has an asymmetric configuration along the cylinder axis (C).

17. Cylinder lock system according to any of the preceding claims, wherein the adjustment key (8) is configured to be unusable as the operating key for the cylinder lock subassembly (2).

18. Cylinder lock system according to any of the preceding claims, wherein the cylinder (4) is configured to be coupled at its rear end (9) with a cam (15) for operating a bolt via the cylinder lock subassembly (2) using the operating key.

19. Method for adjusting a cylinder lock subassembly (2), comprising: providing a cylinder lock system (1) according to any of the preceding claims; inserting the adjustment key (8) into the key opening (7) from the rear end (9) of the cylinder (4), and thereby moving the at least one cylinder locking device (5) to the release position; adjusting the cylinder lock subassembly (2) after the at least one cylinder locking device (5) has been moved to the release position by inserting the adjustment key (8); andremoving the adjustment key (8) from the key opening (7) after the adjusting.

20. Method according to claim 19, wherein the cylinder lock subassembly (2) is configured according to claim 2, wherein the method comprises moving the cylinder (4) relative to the housing (3) from the first cylinder position (I) to the second cylinder position (II), wherein the adjusting is performed while the cylinder (4) is in the second cylinder position (II), wherein the cylinder (4) is preferably moved back to the first cylinder position (I) after the adjusting.

21. Method according to claim 19 or 20, wherein the adjustment concerns the accessibility of the key opening (7) for the operating key via the front end (6).

22. Method according to any of claims 19 - 21, wherein the cylinder lock subassembly (2) is configured according to claim 8, wherein the adjusting comprises inserting the constriction element (13) into the constriction element receiving space (12), or removing the constriction element (13) from the constriction element receiving space (12).

23. Cylinder lock subassembly (2) evidently configured for use as the cylinder lock subassembly (2) in the cylinder lock system (1) according to any of claims 1-18.

24. Adjustment key (8) evidently configured for use as the adjustment key (8) in the cylinder lock system (1) according to any of claims 1-18.

Images