EP3095931B1 - Lock cylinder and lock system with such a lock cylinder - Google Patents

Description

The present invention relates to a lock cylinder comprising a rotatable cylinder core with a symmetrical key channel, which is suitable for receiving a reversible key. In addition, the present invention relates to a locking system with such a lock cylinder and with a key.

Conventional lock cylinders and keys as well as conventional locking systems are known from the prior art, for example from US Pat DE 34 10 462 A1 , In addition, turning key and corresponding lock cylinder and Wendeschließsystem ² e are known, the keys are symmetrical, so that they can be inserted in several orientations in the lock cylinder. This is for example from the DE 34 25 872 A1 known.

In conventional keys and lock cylinders is disadvantageous that the key can be inserted only in one position in the lock cylinder, whereby the handling is impaired. Turnkey and corresponding lock cylinder have the disadvantage that the Variant variety is limited to closing features due to the symmetrical design. For the production of the respective key and lock cylinder high storage is required.

EP 0 065 813 A1 . WO 98/19031 A1 and US 3,736,780 A show a lock cylinder with features of the preamble of claim 1.

The invention has for its object to enable a high variety of variants with reduced storage.

This object is achieved by a lock cylinder with the features of claim 1. Adjacent to and in Schlüsseleinsteckrichtung before the cylinder core an attachment element is arranged with an adjoining the key channel passage and the passage is formed such that the keyway is partially covered by the attachment element.

In this way, a high variety of variants can be provided, while at the same time the number of locking cylinder types to be kept low can be kept. Thus, with only one type of locking cylinders to be kept and cylinder cores different types of locks can be realized, namely conventional lock cylinder on the one hand and lock cylinder for reversible key on the other.

Thereafter, the lock cylinder is characterized in that the keyway is suitable for receiving a reversible key and that the keyway is formed point-symmetrical with respect to its longitudinal axis with the period 180 °.

By the attachment element, which can also be referred to as a profile attachment, the lock cylinder with a keyway for turning key to a lock cylinder without turning function. The attachment element arranged in the axial direction or key insertion direction in front of the cylinder core has a passage adjoining the key channel and formed in such a way that the keyway is partially covered by the attachment element. This allows insertion of a key corresponding to the passage. A reversible key that fits without attachment element in the cylinder core, can not be inserted due to the attachment element.

The attachment element is rotatably coupled to the cylinder core. Attachment element and cylinder core can, for example, be welded or pressed together.

In the following, we talk about a trapezoidal section. This can be designed as a substantially cuboidal section.

Specifically, the passage may have an asymmetrical cross section. Thus, the symmetrical key channel is partially covered by the attachment element. A symmetrical reversible key can thus no longer be inserted into the key channel.

Alternatively or additionally, the passage may have a smaller cross-sectional area than the keyway. Also in this way, insertion of a symmetrical reversible key into the keyway is prevented by the attachment element.

In order to increase the variety of variants, the passage may have projections oriented in the key insertion direction at its edge regions, in particular at its edge regions which are located in the installed position. These prevent that Inserting a key in the keyway, if the key with its cross section does not correspond to the projections, so does not correspond to the projections of the passage.

Specifically, the attachment element may be formed as a profile disk. Thus, a flat design is realized, so that the overall length of the lock cylinder does not increase or only slightly.

Concretely, the passage may be adapted in its cross section to one of several possible key base profiles. This can increase the security against manipulation, since at most keys of a similar key base profile can be introduced into the lock cylinder. Already by providing several, in particular at least two, key base profiles, the security against manipulation can be increased.

Together with the protrusions formed in the edge regions of the passage, the manipulation safety can be increased again, since keys with the same profile base cross section can no longer be inserted into the lock cylinder, depending on the protrusions.

In concrete terms, the keyway can have a cross-sectionally round-cylindrical section and a substantially trapezoidal section which adjoins the round-cylindrical section with a narrow side. This allows a high key stability can be achieved. In addition, this embodiment provides space for a variety of tumblers.

In addition, the keyway can have a further or second circular cylindrical section, which is partially covered by the attachment element. An asymmetrical section of a key can be received in this further or second cross-sectionally cylindrical section. In addition, further tumblers can be arranged here.

Concretely, tumblers may be arranged in the cylinder core, which protrude into the - first - round-cylindrical section. These tumblers can be designed as Stiftzuhaltungsreihen with circumferentially more tumblers, the Stiftzuhaltungsreihen can be arranged on a circular arc, for example, a circular arc of about 300 °.

To increase the variety of variants further or second tumblers may be arranged in the cylinder core, which protrude into the further or second round cylindrical section. Manipulation is thus further complicated.

The object mentioned above is also achieved with a locking system with the features of claim 10. With regard to the inventive step, reference is made to what has been said for claim 1.

Conveniently, the key shank may have a round cylindrical portion and a trapezoidal section in cross section, which is connected at a narrow side with the round cylindrical portion. This creates a stable key profile. A variety of security features may be appropriate.

Specifically, in the trapezoidal section in the key longitudinal direction oriented recesses may be formed, which correspond with projections formed on the passage. These recesses, which may also be referred to as longitudinal grooves, may be formed on broad sides of the trapezoidal section. Thus, profile cascades can be formed that match a corresponding shape of the passage of the attachment element.

Advantageously, incisions for further tumblers can be formed in the trapezoidal section at a narrow side facing away from the round cylindrical section. This makes it possible to increase variant diversity and manipulation security.

To further increase the security, an active closing element can be arranged in the round cylindrical section. The active closing element can be designed as a ball, as a pin, as a magnet or as a roller.

Advantageously, broad sides of the trapezoidal section may have an angled course with mutually parallel sections, a straight parallel course, a course with respective concave sections or a cross shape with laterally projecting struts.

Fig.1

in schematischer Darstellung eine Ausführungsform des Schließzylinders;

Fig.2

in schematischer Darstellung eine Ausführungsform eines Schlüssels des Schließsystems;

Fig.3

einen ersten Schlüsselgrundquerschnitt des Schlüssels aus Fig.2;

Fig.4

einen weiteren Schlüsselgrundquerschnitt des Schlüssels aus Fig.2;

Fig.5

einen weiteren Schlüsselgrundquerschnitt des Schlüssels aus Fig.2;und

Fig.6

einen weiteren Schlüsselgrundquerschnitt des Schlüssels aus Fig.2.

The invention will be explained below with reference to the figures. Show it:

Fig.1

a schematic representation of an embodiment of the lock cylinder;

Fig.2

a schematic representation of an embodiment of a key of the locking system;

Figure 3

a first key base cross-section of the key Fig.2 ;

Figure 4

another key base cross-section of the key Fig.2 ;

Figure 5

another key base cross-section of the key Fig.2 ;and

Figure 6

another key base cross-section of the key Fig.2 ,

FIG. 1 shows a lock cylinder, which is designated by the reference numeral 10. The lock cylinder 10 comprises a rotatable cylinder core 12 with a symmetrical key channel 14. The key channel 14 is suitable for receiving a reversible key.

Adjacent to and in Schlüsseleinsteckrichtung 16 (pointing in the plane of the drawing) in front of the cylinder core 12, an attachment element 18 is arranged with a subsequent to the keyway 14 of the cylinder core 12 passage 20. The passage 20 is formed such that the keyway 14 is partially covered by the attachment element 18.

The attachment element 18 is designed as a profile disk 22. This allows a flat configuration, so that the length of the lock cylinder is not or only slightly extended.

The passage 20 has an asymmetrical cross section. In addition, the passage 20 has a smaller cross-sectional area than the keyway 14.

The passage 20 has at its edge portions in Schlüsseleinsteckrichtung 16 oriented projections 24 (only indicated here). The projections 24 prevent insertion of a key into the keyway 14 when the key is formed with its cross section not corresponding to the projections 24.

The keyway 14 has a cross-sectionally circular cylindrical portion 26 and a substantially trapezoidal portion 28 which connects with a narrow side of the circular cylindrical portion 26. In addition, the keyway 14 has a further or second circular cylindrical section 30, which is partially covered by the attachment element 18.

In the cylinder core 12 tumblers 32 are arranged, which protrude into the - first - circular cylindrical portion 26 (only indicated here). The tumblers 32 are Stiftzuhaltungsreihen, which are arranged on a circular arc, for example, a circular arc of about three hundred degrees.

In the cylinder core 12 further tumblers 34 are arranged, which protrude into the further or second round cylindrical portion 30. The further tumblers 34 may be a pin tumbler row whose pins are arranged in the key insertion direction 16 on a straight line section.

FIG. 2 shows a key 36 of a locking system 11. The key 36 has a key shaft 38 which is adapted in its cross section to the passage 20 so that the key shaft 38 is inserted through the passage 20 in the keyway 14. In particular, the key shank 38 is formed complementary to the passage 20.

The key shank 38 has a round cylindrical portion 40 and a trapezoidal cross-section portion 42 which is connected at a narrow side with the round cylindrical portion 40.

In the trapezoidal portion 42 oriented depressions 46 are formed in the key longitudinal direction 44, which correspond to projections 20 formed on the passage 20. In particular, the recesses 46 are formed complementary to the projections 24 formed on the passage 20.

In the trapezoidal section 42, cuts 50 for the further tumblers 34 are formed on a narrow side 48 facing away from the round cylindrical section 40 (see FIG FIG. 1 ).

In addition, in the round cylindrical portion 40 recesses 52 for the tumblers 32 (see FIG. 1 ) educated.

Concretely, an active closing element 54 in the form of a ball 56 is arranged in the round cylindrical section 40.

In FIG. 3 is a first possible key base profile shown with a view in key longitudinal direction 44 seen from the key tip. To recognize are the Key shank 38 or profile shaft 38 and the round cylindrical portion 40 and the substantially trapezoidal portion 42nd

The partial position (a) shows the position of the possible depressions 46 oriented in the key longitudinal direction 44. The broad sides 58 of the trapezoidal section 42 have an angled course with mutually parallel sections 60 and 62. This form refers to the key base cross section in the raw state, that is with not yet formed wells.

A partial arrangement (b) shows a possible arrangement of recesses 46 oriented in the key longitudinal direction.

FIG. 4 shows another key base cross section of the key 36 FIG. 2 ,

The broad sides 58 of the substantially trapezoidal section 42 have a course with rectilinear parallel sections 64 and 66. Here, too, an arrangement of possible recesses 46 oriented in the longitudinal direction of the key is shown (see partial illustration (a)).

In partial representation (b), an arrangement of the possible recesses 46 is shown by way of example.

FIG. 5 shows another key base cross section of the key 36 FIG. 2 , Partial view (a) shows an arrangement of possible depressions 46 oriented in the key longitudinal direction. The broad sides 58 of the trapezoidal section 42 have a profile with respective concave sections 68, 70.

In partial representation (b), an arrangement of possible depressions 46 oriented in the longitudinal direction of the key is shown.

FIG. 6 shows another key base cross section of the key 36 FIG. 2 , In partial view (a), this key base cross section is shown only in cross section. The trapezoidal portion 42 has a substantially cross shape with lateral struts 72. The partial position (b) shows the position of possible recesses 46 oriented in the longitudinal direction of the key.

Claims (15)

1. Lock cylinder (10) comprising a rotatable cylinder core (12) which has a symmetric key channel (14), an attachment element (18) which has a passage (20) connected to the key channel (14) being arranged adjacent to and before the cylinder core (12) in the key insertion direction (16), and the passage (20) being designed such that the key channel (14) is partially covered by the attachment element (18), characterized in that the key channel (14) is suitable for receiving a reversible key, and in that the key channel (14) is designed to be point-symmetric with the period of 180° with respect to the longitudinal axis thereof.
2. Lock cylinder (10) according to claim 1, characterized in that the passage (20) has an asymmetric cross section.
3. Lock cylinder (10) according to claim 1 or claim 2, characterized in that the passage (20) has a smaller cross-sectional area than the key channel (14).
4. Lock cylinder (10) according to any of the preceding claims, characterized in that the passage (20) has projections (24) at its edge regions that are oriented in the key insertion direction (16).
5. Lock cylinder (10) according to any of the preceding claims, characterized in that the attachment element (18) is designed as a profile disc (22).
6. Lock cylinder (10) according to any of the preceding claims, characterized in that the key channel (14) has a cross-sectionally circular-cylindrical portion (26) and a substantially trapezoidal portion (28) which connects to the circular-cylindrical portion (26) by means of a short side.
7. Lock cylinder (10) according to claim 6, characterized in that the key channel (14) has a further cross-sectionally circular-cylindrical portion (30) which is partially covered by the attachment element (18).
8. Lock cylinder (10) according to claim 6, characterized in that tumblers (32) which protrude into the circular-cylindrical portion (26) are arranged in the cylinder core (12).
9. Lock cylinder (10) according to claim 7, characterized in that further tumblers (34) which protrude into the further circular-cylindrical portion (30) are arranged in the cylinder core (12).
10. Locking system comprising a lock cylinder (10) according to one of the preceding claims and comprising a key (36), the key (36) having a key shaft (38), the cross section of which is adapted to the passage (20) in such a way that the key shaft (38) can be introduced into the key channel (14) through the passage (20).
11. Locking system according to claim 10, characterized in that the key shaft (38) has a circular-cylindrical portion (40) and a portion (42) which has a trapezoidal cross section and is connected on a short side to the circular-cylindrical portion (40).
12. Locking system according to claim 11, characterized in that in the trapezoidal portion (42), recesses (46) oriented in the longitudinal direction (44) of the key are formed which correspond to projections (24) formed on the passage (20).
13. Locking system according to claim 11 or claim 12, characterized in that notches (50) for further tumblers (34) are formed in the trapezoidal portion (42), on a short side (48) which faces away from the circular-cylindrical portion (40).
14. Locking system according to any of claims 11 to 13, characterized in that an active closing element (54), in particular a ball, a pin, a magnet or a roller, is arranged in the circular-cylindrical portion (40).
15. Locking system according to any of claims 11 to 14, characterized in that long sides (58) of the trapezoidal portion (42) have an angled shape comprising mutually parallel portions, a shape comprising rectilinear parallel portions, a shape comprising respective concave portions or a cross shape.

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