阅读说明：本技术 致动盘式锁芯的钥匙坯件和钥匙及制造这种钥匙坯件和钥匙的方法 (Key blank and key for actuating a disc lock cylinder and method for manufacturing such a key blank and key ) 是由 不公告发明人 于 2021-06-07 设计创作，主要内容包括：用于制造用于具有可旋转盘式制动栓的盘式锁芯的钥匙的钥匙坯件,钥匙坯件具有沿着纵向轴线延伸的钥匙轴。钥匙轴还具有横向于纵向轴线延伸的多个凹口,这些凹口彼此间以相等的间隔延伸,并且具有相同的深度。在钥匙中,这些凹口可形成用于驱动盘式制动栓的驱动坡部的倒角。(Key blank for manufacturing a key for a disc cylinder with rotatable disc tumblers, the key blank having a key shaft extending along a longitudinal axis. The key shaft also has a plurality of recesses extending transversely to the longitudinal axis, which recesses extend at equal intervals from one another and have the same depth. In the key, these notches may form chamfers for driving ramps of the disc tumblers.)

1. A key blank (31) for manufacturing a key (33) for a disc lock cylinder (10) having rotatable disc tumblers (16),

the key blank (31) comprising a key shaft (35) extending along a longitudinal axis (L),

wherein the key shaft (35) has a plurality of recesses (37), the plurality of recesses (37) extending transversely to the longitudinal axis (L), at equal intervals from each other and having the same depth.

2. A key blank (31) as claimed in claim 1, wherein the plurality of notches (37) extend in a straight or curved manner relative to the longitudinal axis (L) of the key shaft (35) in a direction transverse to the longitudinal axis (L) of the key shaft (35).

3. A key blank (31) as claimed in claim 1, wherein each of said plurality of notches (37) extends in a plane normal to the longitudinal axis (L) of the key shaft (35).

4. A key blank (31) as claimed in claim 1, wherein said plurality of notches (37) is V-shaped in a cross-section extending parallel to the longitudinal axis (L) of the key shaft (35).

5. A key blank (31) as claimed in claim 1, wherein the plurality of notches (37) form two flanks (39, 41) in a cross-section extending parallel to the longitudinal axis (L) of the key shaft (35), the two flanks (39, 41) being oriented at an acute angle relative to the longitudinal axis (L) of the key shaft (35).

6. Key blank (31) according to claim 1, wherein the key shaft (35) has a vertical axis (H) extending perpendicular to the longitudinal axis (L) of the key shaft (35),

wherein the key shaft (35) has a height along the vertical axis (H), an

Wherein the depth of the plurality of recesses (37) along the vertical axis (H) of the key shaft (35) amounts to at most 15% of the height of the key shaft (35).

7. A key blank (31) as claimed in claim 1, wherein the key shaft (35) has two broad sides (43, 45) opposite each other and two narrow sides (47, 49) opposite each other, the two broad sides (43, 45) extending along the longitudinal axis (L) of the key shaft (35) and the two narrow sides (47, 49) extending along the longitudinal axis (L) of the key shaft (35),

wherein the plurality of recesses (37) are formed on at least one of the two narrow sides (47, 49) of the key shaft (35).

8. A key blank (31) as claimed in claim 7, wherein the at least one narrow side (47, 49) of the key shaft (35) merges at a first end (51) into one (43) of the two broad sides and at a second end (53) into the other (45) of the two broad sides, wherein the plurality of notches (37) extend transversely across the at least one narrow side (47, 49) from the first end (51) to the second end (53).

9. A key blank (31) as claimed in claim 7, wherein said plurality of notches (37) are formed on said two narrow sides (47, 49) of the key shaft (35),

wherein each of the plurality of notches (37) formed on one of the two narrow sides (47) has an associated notch (37) formed on the other of the two narrow sides (49).

10. A key blank (31) as claimed in claim 9, wherein mutually associated notches (37) are arranged on the same level along the longitudinal axis (L) of the key shaft (35).

11. A key (33) for actuating a disc lock cylinder (10) having a plurality of rotatable disc tumblers (16),

the key (33) comprising a key shaft (35), the key shaft (35) extending along a longitudinal axis (L) and having a vertical axis (H) oriented perpendicular to the longitudinal axis (L),

wherein the key shaft (35) has a plurality of drive ramps (55), which drive ramps (55) are arranged adjacent to one another along the longitudinal axis (L) for driving the plurality of disc tumblers (16), wherein the drive ramps (55) are aligned parallel to the longitudinal axis (L) of the key shaft (35) and are oriented at different angles of inclination to the vertical axis (H) of the key shaft (35),

wherein the plurality of driving ramps (55) form a recess with respect to a back (69, 69') of the key shaft (35), and wherein the back (69, 69') of the key shaft (35) has a chamfer (57) adjoining at least some of the plurality of driving ramps (55).

12. A key (33) as claimed in claim 11, wherein the chamfer (57) extends transversely to the longitudinal axis (L) of the key shaft (35) and is oriented obliquely to the longitudinal axis (L).

13. A key (33) as claimed in claim 11, wherein the chamfer (57) is oriented at an acute angle to the longitudinal axis (L) of the key shaft (35) in a cross-section extending parallel to the longitudinal axis (L) of the key shaft (35).

14. A key (33) as claimed in claim 11, wherein the chamfer (57) extends in a direction transverse to the longitudinal axis (L) of the key shaft (35), in a straight or curved manner with respect to the longitudinal axis (L) of the key shaft (35).

15. A key (33) as claimed in claim 11, wherein each of said chamfers (57) extends substantially in a plane normal to the longitudinal axis (L) of the key shaft (35).

16. A key (33) as claimed in claim 11, wherein the key shaft (35) has a height along the vertical axis (H) of the key shaft (35), and

wherein the depth of the chamfer (57) along the vertical axis (H) of the key shaft (35) amounts to at most 15% of the height of the key shaft (35).

17. The key (33) according to claim 11, wherein the key shaft (35) has two mutually opposite broad sides (43, 45) extending along the longitudinal axis (L) of the key shaft (35) and two mutually opposite narrow sides (47, 49) extending along the longitudinal axis (L) of the key shaft (35),

wherein the chamfer (57) is formed on at least one of the two narrow sides (47, 49) of the key shaft (35).

18. Cylinder lock comprising a disc lock cylinder (10) and a key (33) according to claim 11,

wherein the disc lock cylinder (10) has a plurality of disc tumblers (16) along a lock cylinder axis (Z) and a blocking pin (22), wherein the plurality of disc tumblers (16) are rotatable about the lock cylinder axis (Z), the blocking pin (22) is aligned parallel to the lock cylinder axis (Z) and is radially movable relative to the lock cylinder axis (Z), wherein each of the plurality of disc tumblers (16) has a central receiving opening (18) for receiving the key (33) and a peripheral cutout (20) for receiving the blocking pin (22).

19. A method of manufacturing a key blank (31), the key blank (31) being for manufacturing a key (33) for a disc lock cylinder (10) having a rotatable disc tumbler (16),

the method comprises the following steps:

-providing a key shaft (35) extending along a longitudinal axis (L); and

a plurality of recesses (37) are formed at the key shaft (35), the plurality of recesses (37) extending transversely to the longitudinal axis (L), at equal intervals from each other and having the same depth.

20. A method of manufacturing a key (33), the key (33) being for actuating a disc lock cylinder (10) having a plurality of rotatable disc tumblers (16),

the method comprises the following steps:

-providing a key shaft (35), said key shaft (35) extending along a longitudinal axis (L) and having a vertical axis (H) oriented perpendicular to said longitudinal axis (L);

-forming a plurality of notches (37) on said key shaft (35) extending transversely to said longitudinal axis (L) and having the same depth; and

-forming a plurality of drive ramps (55) at the key shaft (35), the plurality of drive ramps (55) being arranged adjacent to each other along the longitudinal axis (L), aligned parallel to the longitudinal axis (L), and oriented at different angles of inclination to the vertical axis (H) of the key shaft (35), wherein the position of the plurality of drive ramps (55) is selected such that at least some of the plurality of drive ramps (55) form cuts (61) in the notches (37), and such that at least some of the plurality of notches (37) form chamfers (57) abutting the plurality of drive ramps (55).

Technical Field

The present invention relates to a key for a cylinder of the disc cylinder type and a key blank for manufacturing such a key. A key blank is provided for manufacturing a key for a disc lock cylinder by forming a plurality of drive ramps or cuts axially offset from one another, as described below. The invention also relates to a method of manufacturing such a key blank and to a method of manufacturing such a key.

Background

The disc type lock cylinder comprises a lock cylinder shell; a cylinder core, which is rotatably mounted in the cylinder housing about a cylinder axis and is also referred to as a disk housing in this connection; and at least one blocking pin, arranged on the outer periphery of the disc housing, aligned parallel to the cylinder axis, radially movable with respect to the cylinder axis, the blocking pin blocking the rotational movement of the disc housing in a radially outer blocking position and releasing the disc housing for rotational movement in a radially inner releasing position. In addition, such a disc lock cylinder comprises a plurality of disc tumblers which are arranged in the disc housing along the lock cylinder axis and are rotatably supported between a locking position and an unlocking position, wherein each disc tumbler has a key receiving opening and at least one blocking cutout at the outer periphery, in which blocking cutout the blocking pin can be at least partially received. The blocking pin can then only be moved into the release position when all the disc tumblers are in their unlocking position, in which the blocking cutouts of the respective disc tumblers are oriented radially with respect to the blocking pin.

Such disk locks are known from DE102011015314a1 and EP0712979B 1.

Disclosure of Invention

According to fig. 1 and 2, the disc lock cylinder 10 can have a cylinder housing 12 and a cylinder core or disc housing 14 which is rotatably supported about a cylinder axis Z in the cylinder housing 12. The rotational movement of the disc housing 14 can be transmitted via a coupling portion 30 connected to the disc housing 14 to a locking mechanism of a lock, not shown, in order to unlock or lock the lock by means of the disc lock cylinder 10.

A plurality of rotatable disc tumblers 16, also referred to as adjuster discs or tumbler discs, are received one after the other in the disc housing 14 behind the fixed disc 15 along the cylinder axis Z. The disc tumblers 16 have respective central receiving openings 18, which central receiving openings 18 together form a key slot 28 for introducing the key 24 and have a rectangular cross section in the example shown. The disc tumbler 16 also has a corresponding peripheral cutout in the form of a blocking cutout 20 for receiving a blocking pin 22 aligned parallel to the cylinder axis Z.

The blocking pin 22 is radially movably received in a slot 32 provided in the wall of the disc housing 14. When the disc lock cylinder 10 is in its closed position and the disc tumblers 16 are thus rotated into their locking position, the blocking pin 22 assumes a radially outer blocking position. In this blocking position, portions of the blocking pin 22 engage into the blocking pin receiving recess 34 provided at the inner wall of the cylinder housing 12 such that the disc housing 14 is blocked (except for a slight rotational clearance) against rotational movement relative to the cylinder housing 12.

The disc tumblers 16 can be transferred from a locked position to an unlocked position by means of a key 24. When all the disc tumblers 16 are in a so-called end-sequencing position, which is situated between the locking position and the unlocking position, then, when viewed in the direction of the cylinder axis Z, the blocking cutouts 20 of all the disc tumblers 16 are aligned with one another and are oriented radially with respect to the blocking pin 22. Thus, the blocking pin 22 can be moved radially inwardly to its release position in which the blocking pin 22 is located outside the blocking pin receiving recess 34 of the cylinder housing 12. Thus, the disc housing 14 is released for rotational movement relative to the cylinder housing 12, and the disc housing 14 can be rotated further in an unlocking direction together with the disc tumblers 16 until an unlocked position is reached.

Fixing notches 44 for receiving core pins 46 may also be provided on the outer periphery of each disc tumbler 16. The core pins 46 are aligned parallel to the cylinder axis Z and are radially movably received in slots provided in the wall of the disc housing 14. In the closed position of the disc lock cylinder 10, the core pins 46 engage into the fixing cutouts 44 of the disc tumblers 16, thereby preventing the disc tumblers 16 from rotating relative to each other when the key 24 is not introduced.

The key 24 associated with the disc lock cylinder 10 has, starting from the corresponding key blank, a plurality of differently angled drive ramps 26 along the key axis S at the key shaft 25, wherein the drive ramps 26 correspond to different angular positions of the blocking cut 20 of the disc tumblers 16. After introduction into the key slot 28, the key 24 first adopts a so-called initial position, from which the key 24 can be rotated in an unlocking direction. By turning the key 24 in the unlocking direction from the initial position, the key 24 is first moved to a so-called zero position, in which the core pin 46 can be moved out of engagement with the fixing cut 44 of the disc tumbler 16 and thus the disc tumbler 16 is released for a rotational movement relative to the disc housing 14, so that the blocking cuts 20 of the disc tumbler 16 can be aligned one after the other (so-called sequencing).

The disc tumblers 16 have a specific rotational play relative to the respective associated actuation ramp 26 of the key 24, the size of which depends on the angular size of the respective actuation ramp 26; that is, during sequencing, the outer or side edge of the shaft 25 of the key 24 and the respective cam portion of the central receiving opening 18 of the associated respective disc tumbler 16 engage one another at different points in time or at different angular positions, depending on the angular size of the notch 26.

For example, starting from the zero position of the disc tumblers 16, the total rotational path of the key 24 up to reaching the end-ordered position of all disc tumblers 16 amounts to approximately 110 °, i.e. after approximately 110 ° of rotation of the key 24, all disc tumblers 16 are ordered and the blocking cut 20 is oriented in radial alignment with the blocking pin 22. The possible angular positions of the blocking slits 20 are usually provided with a pattern of six different angular positions at even intervals, wherein the angular interval between two adjacent blocking slits 20 in the pattern amounts to about 18 °. Thus, there are six possible codings for each disc tumbler 16, wherein the respective disc tumbler 16 must be rotated by a certain angle from its zero position in order to set one of these codings. In the exemplary disc lock cylinder 10, the code "1" corresponds to a rotation of the disc tumblers 16 of about 20 °, the adjacent code "2" corresponds to a rotation of about 38 °, etc., and finally the code "6" corresponds to a rotation of about 110 °, in any case measured from the zero position until the end-of-line position is reached. When the disc tumbler 16 is in the zero position, the blocking cut-out 20 is accordingly arranged at an angular spacing from the blocking reception recess 34 of the cylinder housing 12, which spacing corresponds to the respective coding.

At the code "6", a positive coupling can be provided between the respective disc tumbler 16 and the relevant part of the key 24, i.e. there is no driving ramp or a driving ramp with an angular dimension of 0 °, so that there is no rotational play between the key 24 and the disc tumbler 16.

In contrast, at code "1", there is the greatest possible rotational play between the key 24 and the disc tumbler 16, i.e. a drive ramp 26 having an angular dimension of approximately 90 ° is provided at the key 24. Thus, the disc tumblers 16 coded "1" are normally only employed at the end of the rotary actuation of the key 24, i.e. after a rotation of about 90 °, and the disc tumblers 16 coded "1" are brought into their end sequencing position by a further rotation of the key 24 of about 20 °.

The disk cylinder can also have one or more so-called lifting disks, which are usually disk tumblers. Each lifting disc has a code "6" and is arranged at a predetermined axial position in the disc housing, for example directly in front of, behind or in the centre of the lock cylinder 10 with respect to the key introduction direction. The disc tumbler, which serves as a lifting disc, has a positive coupling with the key 24. Upon key actuation in the unlocking direction, the lift disk is used to couple the key 24 to the disk housing 14 after completion of the sequencing (rotation 110 °), thereby enabling rotational entrainment of the disk housing 14. Starting from the release position of the blocking pin 22, the lifting disc, upon key actuation in the locking direction, ensures that the blocking pin 22 is lifted properly from the stop notch 20 of the disc tumbler 16 (i.e. pushed into the blocking pin receiving recess 34) and, for example, does not tilt.

In addition, an intermediate disk 36 is usually arranged between the disk tumblers 16, which intermediate disk 36 is coupled to the disk housing 14 in a rotationally fixed manner or with a rotational play. The intermediate disk 36 couples adjacent disc tumblers 16 apart from one another, so that a rotational movement of a respective disc tumbler 16 does not affect the co-rotation of its adjacent disc tumbler 16 due to friction. This entrapment may have the result that the disc tumblers 16 are in some cases rotated beyond their unlocked position and the lock cylinder 10 may no longer open.

The rotationally fixed coupling of the intermediate disk 36 to the disk housing 14 can take place by means of an abutment portion 40 of the intermediate disk 36, which abutment portion 40 extends at least partially in the radial direction (fig. 2) and contacts a corresponding projection 42 formed on the inner wall of the disk housing 14. Each intermediate disc 36 has a peripheral cut-out 38 radially aligned with the blocking pin 22. Each intermediate disk 36 therefore has a further peripheral cutout 38a, which is aligned radially with the core pin 46 and is preferably arranged diametrically opposite the peripheral cutout 38.

It has proven to be advantageous to prevent actuation with a disc lock cylinder of the type described above. Therefore, there is a need for a key for such a disc cylinder which is capable of comfortably actuating the disc cylinder.

It is therefore an object of the present invention to provide a key for a disc lock cylinder and a possibility of manufacturing such a key, in order to enable a comfortable key operation when actuating the disc lock cylinder.

This object is achieved by a key blank having the features of claim 1, which can be provided for manufacturing a key for a disc lock cylinder with disc tumblers. In particular, the object is achieved by: the key blank has a key shaft extending along a longitudinal axis and having a plurality of notches extending transversely to the longitudinal axis, the notches extending at equal intervals from each other and having the same depth.

Thus, the key blank has a plurality of notches along the key shaft, which notches may also be designated as grooves or cuts, and extend transverse to the longitudinal axis. In particular, the recesses may be arranged adjacent to each other and/or may be aligned parallel to each other. In particular, the notches may extend in respective planes normal to the longitudinal axis, such that the notches may extend perpendicular to the longitudinal axis.

In particular, by means of these notches, the key shaft of the key blank can be prepared for manufacturing a key for actuating the disc lock cylinder from the key blank by subsequently forming a drive ramp for coding the key and, if desired, by further manufacturing steps, for example by forming a grip portion. The recess can be produced, for example, by cutting into or into the key shaft, in particular by a pointed tool which extends transversely through the rear of the key shaft. Thus, in particular, the notch may be formed with flanks which are inclined with respect to the longitudinal axis, or may be formed converging to a point. Thus, the drive ramp can be formed on the key blank, for example by milling or cutting, wherein a plurality of drive ramps can be formed one after the other according to the mutual spacing of the notches along the longitudinal axis of the key shaft.

Thus, in order to manufacture a coded key on the basis of a key blank, a drive ramp can be selectively machined into the key shaft, wherein the drive ramp is not absolutely necessary at all possible positions along the key shaft, and wherein the drive ramp can have different orientations and depths corresponding to the desired respective coding. A regular arrangement of notches along the key shaft can be used as a pattern of driving ramps. At least some of the drive ramps, in particular those which extend to the rear of the key shaft, can in this connection form a cut in the recess, so that the recess or its flanks can form a chamfer for the edge, which chamfer appears at the back of the key shaft when the drive ramp is milled, or can form a chamfer.

Since the key blank is prepared with a notch introduced into the key shaft, instead of right-angled and usually sharp edges on the outside of the key shaft or on the back of the key shaft, inclined or longitudinally chamfered edges or bevels can be formed, which remain in the ordinary key blank after the formation of the driving ramp. On the one hand, a smooth and improved introduction of the key into the key slot of the disc lock cylinder can thereby be achieved, and on the other hand, during handling of the key manufactured from the key blank, contact with sharp edges on the outside of the key shaft can also be prevented, which can be unpleasant or painful for the user. In this way, any damage to parts of the garment, for example to the trousers pocket in which the key is stored or transported, due to such sharp edges on the outside of the key is also avoided.

In particular, the recesses may be manufactured or formed in the same manner and thus may have the same depth except for any manufacturing tolerances. Typically, such key blanks may have, in addition to the plurality of notches, further recesses, optionally extending transversely to the longitudinal axis.

Further embodiments of the invention can be seen from the dependent claims, the description and the drawings.

The recess may further extend in the circumferential direction of the key shaft, wherein the recess may be arranged along the longitudinal axis of the key shaft, in particular in the same circumferential region of the key shaft.

In addition, the recess may have the same length with respect to its extension transverse to the longitudinal axis and/or the recess may extend transversely across the back of the key shaft.

In some embodiments, the notch may extend in a straight or curved manner relative to the longitudinal axis, transverse to the longitudinal axis of the key shaft. Alternatively or additionally, in some embodiments it may be provided that each of the recesses extends in a direction plane with the longitudinal axis. In particular, the recesses may extend parallel to each other.

The cross section of the key shaft may be rectangular and/or may have two sides which are opposite one another and aligned parallel to one another, for example, so that the recess may extend on a straight line transverse to the longitudinal axis through one of these sides or through the back of the key shaft formed by this side.

The key shaft can further be at least sectionally curved, for example in cross section, and can in particular have the shape of a circular arc sectionally, wherein the recess can be formed on such a curved side or curved back of the key shaft. In this respect, the recesses can also be formed in a straight line, so that the depth of the individual recesses can vary in relation to the back of the key shaft in its direction of extension transversely to the longitudinal axis of the key shaft. For example, the recess may have a maximum depth in the central portion with respect to the direction of extension, wherein a plurality of recesses may have the same maximum depth. Alternatively, the recess can also extend in a curved manner, in particular corresponding to any curvature of the back of the key shaft, so that when the back of the key shaft is formed in a curved manner transversely to the longitudinal direction, the recess can also have a constant depth relative to the back along its direction of extension.

In some embodiments, the recess may be V-shaped in a cross-section extending parallel to the longitudinal axis of the key shaft. Alternatively, or in the case of a V-shaped configuration, the recess may have two flanks in a cross section extending parallel to the longitudinal axis of the key shaft, said flanks being oriented at an acute angle relative to the longitudinal axis of the key shaft, wherein the angle is in particular in the range of 30 ° to 60 °, and preferably amounts to 45 °. The flanks collide with each other in the lower part of the notch and may form a V-shaped notch in a cross section parallel to the longitudinal axis or may be connected to each other by the base of the notch, which may for example be aligned parallel to the longitudinal axis or may be curved.

The formation of such a recess with oblique flanks, in particular a V-shaped formation of the recess, can be produced in a simple manner by puncturing with a pointed tool. The flanks inclined with respect to the longitudinal axis can be used in particular to form a chamfer of the edge, which is produced as a result of the formation of the driving ramp at the key blank, in order to avoid the formation of a sharp edge at the rear of the key shaft as a result of such a bevel. The side flaps may also extend in a transverse direction, in particular perpendicular to the longitudinal axis, wherein the transverse direction may be straight or curved.

In some embodiments, the depth of the recess along a vertical axis of the key shaft perpendicular to the longitudinal axis may reach at most 15% of the height of the key shaft. Thus, the notch can form only a slight recess at the key shaft, so that the edge which is produced when the drive ramp is produced can be chamfered in the transverse direction without the formation of the drive ramp being impaired as a result. In addition, due to the shallow depth, in the case of a V-shaped construction and/or in the case of flanks oriented at an acute angle to the longitudinal axis, the recess can be formed in particular as a narrow recess along the longitudinal axis, so that the key shaft or the back of the key shaft undergoes only a slight change by the formation of the recess.

In some embodiments, the key shaft may have at least five recesses, in particular at least six recesses, at least seven recesses, or at least eight recesses. Additionally, in some embodiments, the key shaft may have exactly five notches, exactly six notches, exactly seven notches, or exactly eight notches. This may in particular enable a common number of drive ramps of a common width to be formed on the key blank, wherein it may in particular be provided that a drive ramp is formed between two notches of the plurality of notches, which are outer notches with respect to the longitudinal axis.

In some embodiments, the key shaft may have two mutually opposite broad sides extending along the longitudinal axis and two mutually opposite narrow sides extending along the longitudinal axis, wherein the recess may be formed on at least one of the narrow sides. The notches may in particular be formed on both narrow sides of the key shaft.

The narrow sides may be arranged opposite each other with respect to a vertical axis extending perpendicular to the longitudinal axis, and the wide sides may be arranged opposite each other with respect to a transverse direction extending perpendicular to the longitudinal axis and perpendicular to the vertical axis. The narrow side may be formed to have a width defined by an extent in the lateral direction, and may in particular be smaller than a height of the wide side defined by an extent along the vertical axis. In particular, the two narrow sides may merge into a wide side at the respective end. The key blank can thus be formed narrower in order to be able to introduce the key manufactured therefrom into the narrower key slot of the disc cylinder.

In some embodiments, the narrow side may be curved, and in particular may be formed as a circular arc shape in a cross section extending perpendicular to the longitudinal axis of the key shaft. Alternatively, the narrow side may be formed in a straight line. The broad side may extend substantially in a plane defined by the vertical axis and the longitudinal axis, and may for example have only a cut-out in the central portion, which cut-out extends along the longitudinal axis and can be used for guiding a key manufactured from a key blank in the key slot. In addition, different types of designs and/or orientations of the broad sides may also be provided in general. For example, the cross-section of the key blank may be kidney-shaped or Z-shaped, such that the broad sides may be concave or may be obliquely oriented with respect to a vertical axis.

In some embodiments, at least one narrow side may merge into one broad side at a first end and into another broad side at a second end, wherein the notch may extend across the narrow side from the first end to the second end. Thus, the notch may completely span the narrow side in the transverse direction. The recess formed in one narrow side may in particular be formed so as to converge into a point in the direction of the other, oppositely situated narrow side. This also makes it possible to use the flanks of the notches as chamfered edges or bevels on the outside, in particular on the narrow sides, of the key shaft in order to be able to smoothly introduce the key formed from the key blank into the key slot and to comfortably manipulate the key.

In particular, a key blank formed with two narrow sides and two wide sides may be suitable for manufacturing a key for a disc cylinder, for example, the orientation in which the key can be introduced into the keyway may be directly visible to the user due to this profile. In this respect, such a key particularly requires a possibility of comfortable handling, and therefore the invention also relates independently to a key blank for manufacturing a key for a disc cylinder with a disc tumbler, said key blank having two mutually opposite broad sides extending along a longitudinal axis and two mutually opposite narrow sides extending along the longitudinal axis, wherein a plurality of notches extending transversely to the longitudinal axis are formed on at least one of the narrow sides. In this respect, the recess may particularly have the features and characteristics explained here above and below.

In some embodiments, the recess may form an edge of a drive ramp to be formed and/or already formed for driving the disc tumbler. In this respect, one flank of each notch may in particular form a sloping edge of the drive ramp, while the other flank may be removed during or as a result of the formation of the drive ramp. For this purpose, the drive ramp may be formed, for example, as a cut-out cut into the recess, wherein the boundary of the drive chamfer is an axial (front or rear) boundary with respect to the longitudinal axis, which may extend centrally through the recess and/or through a lower point of the recess, in particular. The drive ramp can be formed in particular as a cut-out in a respective half of two mutually adjacent recesses.

In some embodiments, each of the plurality of recesses formed at one narrow side may have a respective recess formed respectively at the other narrow side associated therewith, wherein the respective mutually associated recesses may in particular be arranged on the same level along the longitudinal axis of the key shaft and/or may be arranged diametrically opposite each other with respect to the longitudinal axis. Thus, the key shaft can be provided with mutually associated notches on both sides or both narrow sides, so that an inclined edge forming or to be formed a driving ramp can be generated on both sides. A key manufactured from such a key blank can be formed in particular rotationally symmetrical with respect to a rotation of 180 °, due to the arrangement of the mutually associated recesses on one level with respect to the longitudinal axis, so that the key can in this respect be introduced into the key slot for actuating the disc lock cylinder in any desired direction.

The invention also relates to a key for actuating a disc lock cylinder having a plurality of rotatable disc tumblers. The key comprises a key shaft which extends along a longitudinal axis and has a vertical axis which is oriented perpendicularly to the longitudinal axis, wherein the key shaft has a plurality of drive ramps for driving disc tumblers which are arranged adjacent to one another along the longitudinal axis, which disc tumblers are aligned parallel to the longitudinal axis, and which disc tumblers are oriented obliquely at different angles relative to the vertical axis of the key shaft. In this respect, the driving ramp forms a recess relative to the back of the key shaft. The back of the key shaft has a chamfer adjoining at least some of the driving ramps.

The key may in particular be formed from a correspondingly machined key blank according to any one of the above embodiments.

The drive ramps can form a coding of the key with respectively different angular orientations, so that a sequencing of the correspondingly coded disc tumblers of the disc cylinder can be initiated by the key. In particular, the drive ramps may be formed between the notches of a key blank of the type described above, for example by milling or cutting. The chamfer may in particular be formed by flanks of the notch remaining after machining, and a chamfer may be formed at the back of the key shaft to chamfer the chamfered edge. This enables smooth introduction of the key into the key slot of the disc cylinder and comfortable operation.

However, not all driving ramps have to abut one chamfer or two chamfers of the key shaft. Depending on the respective coding required, the driving ramps can have different orientations and depths, and depending on the orientation and depth, the respective driving ramps can extend all the way to the back of the key shaft and can adjoin a ramp at the back of the key shaft.

In some embodiments, the chamfer may extend transversely to the longitudinal axis of the key shaft and may be oriented obliquely with respect to the longitudinal axis, in particular at an angle in the range of 30 ° to 60 °, and this angle is preferably equal to 45 °. In the direction of the key tip, through which the key can be introduced into the key introduction opening of the disc lock cylinder, in this connection the chamfer can in particular be formed deepened along the longitudinal axis or inclined with respect to the vertical axis in order to facilitate the introduction and alignment of the key in the key slot. Alternatively or additionally, the chamfer may be formed deepened along the longitudinal axis or inclined with respect to the vertical axis in a direction away from the key tip to facilitate removal of the key from the keyway.

In some embodiments, the chamfer may form a flank which, in a section extending parallel to the longitudinal axis of the key shaft, is oriented at an acute angle to the longitudinal axis of the key shaft. The angle may in particular be in the range of 30 ° to 60 °, and may for example reach 45 °.

Additionally, the chamfer may be oriented oblique to a normal plane of the longitudinal axis.

In some embodiments, the chamfer may extend in a straight or curved manner relative to the longitudinal axis, transverse to the longitudinal axis of the key shaft. Further, in some embodiments, each of the chamfers may extend substantially in a plane perpendicular to the longitudinal axis of the key shaft (and in this respect, as explained, may be oriented obliquely with respect to the longitudinal axis). In particular, the chamfers may be aligned parallel to each other and may be oriented perpendicular to a longitudinal axis of the key shaft.

In some embodiments, the depth of the chamfer along the vertical axis of the key shaft may reach at most 15% of the height of the key shaft. The chamfer can thus form an inclined edge of the driving ramp which extends transversely to the longitudinal axis, in particular transversely to the back of the key shaft, while the driving ramp can form a deeper extending groove of the key shaft.

In some embodiments, the key shaft may have two mutually opposite broad sides extending along the longitudinal axis and two mutually opposite narrow sides extending along the longitudinal axis, wherein a chamfer may be formed on at least one of the narrow sides. Chamfers may be formed on both narrow sides of the key shaft. Thus, the key shaft may be elongated in cross-section, e.g. rectangular or substantially rectangular with a curved narrow side and/or a curved wide side, in order to be able to be introduced into a narrow key slot. The narrow side may in particular extend along the longitudinal axis and may be formed in a curved manner, for example in the shape of a circular arc in a cutting surface oriented perpendicularly to the longitudinal axis. The back of the key shaft forming the chamfer may also extend in a curved manner and/or in the shape of a circular arc in a cross section oriented perpendicular to the longitudinal axis.

Additionally, in some embodiments, each of the drive ramps may have a planar drive region. However, the transition region of the driving ramp arranged in the peripheral direction of the key shaft can also be curved or rounded, so that the driving ramp can merge, for example, uniformly into the rounded back of the key shaft in the transition region. The drive region can be used in particular for moving or driving the disk tumblers during the sequencing.

In particular, the drive ramps may be formed between the notches of a key blank of the type described above, and the chamfers may be formed by the flanks of such notches. In this respect, the respective drive ramp may be provided between two notches of the key blank which are adjacent to each other along the longitudinal axis.

The present invention also relates to a cylinder lock comprising a disc lock cylinder and a key, wherein the disc lock cylinder has a plurality of disc tumblers rotatable about a cylinder axis along the cylinder axis and a blocking pin aligned parallel to the cylinder axis and radially movable with respect to the cylinder axis, wherein each disc tumbler has a central receiving opening for receiving the key and a peripheral cutout for receiving the blocking pin, as disclosed herein. In this respect, the receiving openings of the disc tumblers can be arranged in alignment with one another and form a key slot into which a key for actuating the disc cylinder can be introduced.

In some embodiments of the disc lock cylinder, it may be provided that the blocking pin blocks a rotational movement of the cylinder core in a radially outer blocking position and releases the cylinder core for a rotational movement in a radially inner releasing position. In this respect, the disc tumblers are rotatable between a locked position and an unlocked position, wherein the blocking pin can only be moved into the release position when all disc tumblers are in their unlocked position, in which the peripheral cut-out of the respective disc tumbler is radially oriented with respect to the blocking pin. The key can be configured such that the disc tumblers can be sequenced by actuating the ramps, so that the peripheral cuts of the disc tumblers can be arranged aligned with one another along the cylinder axis and radially with respect to the blocking pin in their respective unlocking positions.

The invention also relates to a method of manufacturing a key blank for manufacturing a key for a disc lock cylinder with rotatable disc tumblers, the method comprising the steps of:

-providing a key shaft extending along a longitudinal axis; and

-forming a plurality of notches at the key shaft extending transversely to the longitudinal axis, the notches extending at equal intervals from each other and having the same depth. In this regard, the key blank may be particularly configured as disclosed herein.

The notches may in particular be formed so as to be able to produce, when the drive ramp for the coding key is subsequently formed, a chamfered edge or chamfer which enables smooth introduction of the key made from the key blank and comfortable handling of said key. In a subsequent step of manufacturing the key blank, the drive ramp can be formed accordingly, in particular by milling.

The invention also relates to a method of manufacturing a key for actuating a disc lock cylinder having a plurality of rotatable disc tumblers. The method comprises the following steps:

-providing a key shaft extending along a longitudinal axis and having a vertical axis oriented perpendicular to the longitudinal axis;

-forming a plurality of notches at the key shaft extending transversely to the longitudinal axis and having the same depth, wherein the notches are particularly formed in a key blank of the type disclosed herein; and

-forming a plurality of drive ramps, which are arranged adjacent to each other along a longitudinal axis, which are aligned parallel to the longitudinal axis, and which are oriented at different angles of inclination to the vertical axis of the key shaft, wherein the positions of the drive ramps are selected such that at least some of the drive ramps form a cut in the recess, and such that at least some of the recesses thereby form a chamfer adjoining the drive ramp. In this regard, the drive ramps and/or chamfers may be particularly formed in keys of the type disclosed herein.

The drive ramp forming the cut into the notch may in particular be formed such that the boundary of the drive ramp, which is an axial boundary relative to the longitudinal axis of the key shaft, passes through the central portion of the respective notch, and the remaining flanks of the notch form said chamfer. Further, a grip portion may be formed at the key shaft, or the key shaft may be provided with and/or connected to the grip portion.

Drawings

The application will be explained below by way of example with reference to embodiments and the accompanying drawings.

In the drawings:

fig. 1 shows a longitudinal section through a disc lock cylinder with a key;

fig. 2 shows an exploded view of parts of the disc lock cylinder with key according to fig. 1;

3A-3D show a longitudinal view of a key blank of the type disclosed herein having a key shaft, a detailed view of a front portion of the key blank, a detailed view of a portion of the rear portion of the key shaft for showing a notch formed therein, and a front view of the key blank;

FIGS. 4A and 4B show a longitudinal view of a key blank formed with a drive ramp and a detailed view of the front of the key blank; and

fig. 5A to 5D show a longitudinal view of a key manufactured from a key blank, a perspective view of the key, a detailed perspective view of the front part of the key, and further detailed perspective views for illustrating chamfers adjoining the drive ramps.

Detailed Description

Fig. 3A shows a key blank 31 for manufacturing the key 33 shown in fig. 5A and 5B. This key 33 can be provided to actuate a disc lock cylinder 10 of the type shown in fig. 1 and explained in the introduction and to sequence its disc tumblers 16 so as to be able to arrange the blocking pins 22 in the peripheral cut-outs 20 of the disc tumblers 16 in the release position and to be able to transmit further rotation of the key 33 to the disc housing 14. The disc housing 14 may be coupled to a locking mechanism of a lock, not shown, by a coupling portion 30, such that the lock may be selectively opened or locked by a key 33.

Such key blanks 31 may have been machined with respect to some features (e.g., profile, key tip); however, there is no final coding of the key 33.

The key blank 31 shown in fig. 3A has a key shaft 35 extending from a connecting portion 63, the connecting portion 63 serving to attach a grip portion 67 for the key 33 (see fig. 5A and 5B) to a key tip 65 along the longitudinal axis L, by means of which key tip 65 the key 33 can be introduced into the key introduction opening 19 of the key slot 28 of the disc lock cylinder 10 (see fig. 1 and 2). In this respect, the key shaft 35 has a first narrow side 47 extending along the longitudinal axis L and a second narrow side 49 also extending along the longitudinal axis L, the second narrow side 49 being opposite the first narrow side 47 with respect to a vertical axis H of the key shaft 35 oriented perpendicularly to the longitudinal axis L. At the respective first end 51, the two narrow sides 47, 49 merge into a first wide side 43, which first wide side 43 extends along the longitudinal axis L and connects the two narrow sides 47, 49 along the vertical axis H. The second broad side 45 is opposite the first broad side 43 with respect to a transverse direction Q oriented perpendicular to the longitudinal axis L and the vertical axis H, wherein the first narrow side 47 and the second narrow side 49 merge into the second broad side 45 at respective second end portions 53 (see fig. 3D).

As shown in fig. 3D, the narrow sides 47 and 49 are formed in a shape of a circular arc in cross section or viewed from the key tip 65 along the longitudinal axis L. In contrast, the broad sides 43 and 45 extend substantially along the vertical axis H, or in a plane parallel to the vertical axis H, but have in a central region respective cut-outs 75, which cut-outs 75 extend along the longitudinal axis L as key guides 77 for orienting the key 33 during introduction into the key introduction channel 28 (see fig. 3A, 3B and 3D, 4A and 4B and 5A to 5D).

In addition, a plurality of notches 37 are formed at both narrow sides 47 and 49 of the key shaft 35, which notches form respective mutually opposing back portions 69 and 69' as the outer sides of the key shaft 35 (see fig. 3A to 3C). In particular, these notches 37 can be formed in the first step of manufacturing the key 33 at the provided key blank 31 and can be pierced, for example by a pointed tool, into the backs 69 and 69'. The notches 37 extend transversely to the longitudinal axis L and are arranged at equal intervals to each other with respect to the longitudinal axis L. In the embodiment shown, the notches 37 extend in respective planes normal to the longitudinal axis L and are parallel to each other along a transverse direction Q oriented perpendicular to the longitudinal axis. In addition, all of the plurality of notches 37 have the same depth with respect to the vertical axis H.

Since the back portions 69 and 69 'or the narrow sides 47 and 49 are formed in the shape of circular arcs, the recess 37 extending in a straight line has a varying depth in the transverse direction Q with respect to the respective back portion 69 or 69', wherein the depth is at a maximum in a central portion with respect to the transverse direction Q. In this regard, all of the plurality of notches 37 have the same maximum depth. Alternatively, the cross section of the recess 37 may also be curved and may in particular extend in the shape of a circular arc, so that the depth of the recess 37 relative to the respective back 69 or 69 'may also be constant along the transverse direction Q, irrespective of the curvature of the backs 69 and 69'.

In particular, as can be seen from the detailed view of fig. 3C, the notches 37 are V-shaped in a section extending parallel to the longitudinal axis L and have respective first flanks 39 and respective second flanks 41, the first flanks 39 and the second flanks 41 being oriented at an acute angle with respect to the longitudinal axis L. In particular, the angle is equal to 45 ° here, wherein a range of 30 ° to 60 ° can generally be provided. In addition, the same number of notches 37 is formed at both narrow sides 47 and 49, wherein each of the notches 37 at a first narrow side 47 has a correspondingly formed notch 37 at its associated second narrow side 49, which notches 37 are at the same level with respect to the longitudinal axis L (see in particular fig. 3B). This may enable, for example, the key 33 to be formed rotationally symmetrically with respect to a rotation of 180 ° (reversible key).

In addition, the recess 37 represents only a slight cut or incision, the depth of which relative to the extension of the key shaft 35 or the broad sides 43 and 45 along the vertical axis H is less than 15% of the total height of the key shaft 35 along the vertical axis H. The formation of the recess 37 at the key shaft 35 is therefore accompanied only by a slight adaptation of said key shaft 35, so that, in particular, by means of the key 33 produced from the key blank 31, the formation of the drive ramp 55 or the actuation of the disc lock cylinder 10 is not impaired (see also fig. 4A to 5D).

In the course of further processing of the key blank 31 to produce the key 33, in particular, a drive ramp 55 may then be formed on the key blank 31 to provide a coding of the key 33 for sequencing the disc tumblers 16. As shown in fig. 4A to 5D, these driving ramps 55 form recesses with respect to the back 69 or 69' of the key shaft 35 and between the notches 37 with respect to the longitudinal axis L. The drive ramp 55 has a flat drive region 59 in order to be able to drive the disc tumblers 16 of the disc lock cylinder 10. In the transition region to the respective narrow side 47 or 49, the drive ramp can conversely have a curved or rounded shape in order to enable a smooth transition into the narrow side 47 or 49. For example, the drive ramps 55 may be formed on the key blank 31 by milling.

Some of the drive ramps 55 extend up to the respective back 69 or 69 'relative to the vertical axis H, while the other drive ramps 55 are integrally recessed relative to the backs 69 and 69' (see fig. 4A to 5D). In this regard, the back portions 69 and 69 'have chamfers 57 that form edges or ramps that extend up to the drive ramps 55 of the back portions 69 and 69'.

The chamfer 57 is oriented obliquely at an angle of 45 ° with respect to the longitudinal axis L and increases in height from the key tip 65 along the longitudinal axis L with respect to the vertical axis H in the direction of the connecting portion 63 or the gripping portion 67. Thus, the chamfer 57 may assist in guiding the key 33 into the key slot 28 of the disc lock cylinder 10, so that a smooth actuation of the disc lock cylinder 10 may be achieved. In addition, due to these chamfers 57, the edges of the milling drive ramps 55 formed at right angles in a conventional key or key blank can be chamfered at the back surface 69 or 69' so that the operation of the key 33 can be made more comfortable and sharp edges can be avoided.

In particular, as can be seen from a comparison of fig. 3A to 3C and in fig. 4A to 5D, those drive ramps 55 which extend up to the backs 69 and 69' are designed to cut into the notches 37 previously formed at the key blank 31, so that the chamfers 57 are formed by the respective second flanks 41 of the respective notches 37. Thus, the chamfer 57 is automatically created upon formation of the drive ramp 55 due to the notch 37 that has been previously formed on the key blank 31.

In those cases where the drive ramp 55 does not extend to the respective back 69 or 69' or where the chamfer 57 is not formed, the notch 37 may remain on the outside (see in particular fig. 5D). Thus, the drive ramp 55 may have a range along the longitudinal axis L that is greater than the spacing between two consecutive notches 37. In addition, two successive drive ramps 55 may also terminate at the same height relative to the vertical axis H, so that the recess 37 can be retained. However, since such a notch 37 is held at the back of the key 33, there is no limitation in the use or operation of the key 33 due to the inclined formation of the flanks 39 and 41 and the small depth of the notch 37. Thus, the notches 37 do not oppose the variable coding of the key 33 by the differently oriented and formed drive ramps 55.

Thus, forming the notch 37 at the key blank 31 extending transversely to the longitudinal axis L makes it possible to form in a simple manner a chamfer 57 or a ramp at the key 33 manufactured or to be manufactured from the key blank 31 and to avoid sharp edges at the back 69 and 69' of the key shaft 35. Thereby, it is possible to make it comfortable to handle and use the key 33 for actuating the disc cylinder 10.

Description of reference numerals

10 disk type lock core

12 lock core shell

14 disc housing

15 fixed disk

16 disc type brake bolt

18 receiving opening

19 key introduction opening

20 blocking incision

22 blocking pin

24 key

24' key blank

25 key shaft

26 driving slope part

28 key groove

30 coupling part

31 Key blank

32 groove

33 Key

34 blocking the pin receiving recess

35 Key shaft

36 middle disc

37 recess

38. 38a peripheral incision

39 first side wing

40 abutting part

41 second side wing

42 projection

43 first broad side

44 fixation incision

45 second broad side

46 core pin

47 first narrow side

49 second narrow side

51 first end portion

53 second end portion

55 driving slope part

57 chamfer

59 drive region

61 cutting part

63 connection part

65 key tip

67 grip portion

69 Back part

69' back

H vertical axis

L longitudinal axis

Q transverse direction

S key axis

Z cylinder axis.