NZ713965B - Locking system, key and key blank - Google Patents
Locking system, key and key blankInfo
- Publication number
- NZ713965B NZ713965B NZ713965A NZ71396515A NZ713965B NZ 713965 B NZ713965 B NZ 713965B NZ 713965 A NZ713965 A NZ 713965A NZ 71396515 A NZ71396515 A NZ 71396515A NZ 713965 B NZ713965 B NZ 713965B
- Authority
- NZ
- New Zealand
- Prior art keywords
- abutment
- key
- profile
- counter
- keyway
- Prior art date
Links
- 230000000295 complement Effects 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000000875 corresponding Effects 0.000 description 6
- 230000000903 blocking Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral Effects 0.000 description 2
- 230000003068 static Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000002441 reversible Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/0017—Key profiles
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/0017—Key profiles
- E05B19/0023—Key profiles characterized by variation of the contact surface between the key and the tumbler pins or plates
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/0017—Key profiles
- E05B19/0035—Key profiles characterized by longitudinal bit variations
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/0094—Keys; Accessories therefor protruding elements on the key preventing unauthorized insertion into the keyhole
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/04—Construction of the bow or head of the key; Attaching the bow to the shank
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
- E05B27/0003—Details
- E05B27/0017—Tumblers or pins
- E05B27/0021—Tumblers or pins having movable parts
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
- E05B27/0032—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with both axially and radially arranged tumbler pins or balls
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
- E05B27/02—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in operated by the edge of the key
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
- E05B35/001—Locks for use with special keys or a plurality of keys ; keys therefor with key identifying function
Abstract
locking system comprises a lock cylinder which has a cylinder housing, a cylinder core rotatably supported in the cylinder housing and having a keyway, and has a plurality of tumblers which partly project into the keyway, and which furthermore comprises a key which has a key bow and a key shaft which has a shaft profile for acting on the tumblers. An abutment section is formed at the key shaft between the key bow and the shaft profile, said abutment section having an abutment profile having at least one projection and an undercut formed between the projection and the shaft profile. The lock cylinder furthermore comprises a movable counter-abutment. In this respect, the abutment section of the key and the movable counter-abutment of the lock cylinder are arranged and configured such that, on an introduction of the key into the keyway, the abutment section abuts the movable counter-abutment with at least one abutment surface within the keyway and in so doing forms the only active abutment formed at the key for limiting the introduction of the key into the keyway to a correct axial introduction depth. ich has a shaft profile for acting on the tumblers. An abutment section is formed at the key shaft between the key bow and the shaft profile, said abutment section having an abutment profile having at least one projection and an undercut formed between the projection and the shaft profile. The lock cylinder furthermore comprises a movable counter-abutment. In this respect, the abutment section of the key and the movable counter-abutment of the lock cylinder are arranged and configured such that, on an introduction of the key into the keyway, the abutment section abuts the movable counter-abutment with at least one abutment surface within the keyway and in so doing forms the only active abutment formed at the key for limiting the introduction of the key into the keyway to a correct axial introduction depth.
Description
Locking system, key and key blank
The present invention relates to a locking system having a lock cylinder and a key;
to a key for use in such a locking system; and to a key blank for manufacturing
such a key.
A locking system can comprise a lock cylinder and a key. The lock cylinder can
have a cylinder housing, a cylinder core rotatably supported in the cylinder
housing and having a keyway, and a plurality of tumblers which partly project into
the keyway of the cylinder core. The key can have a key bow (also called a key
head) and a key shaft which extends, starting from the key bow, along a key axis
in a key introduction direction and which has a shaft profile to act on the tumblers
of the lock cylinder. Such a locking system can in particular comprise a plurality of
keys and/or a plurality of lock cylinders, wherein provision can be made, on the
one hand, that a respective key is suitable to open a plurality of different lock
cylinders and wherein provision can be made, on the other hand, that a plurality of
different keys can be suitable to open the same lock cylinder.
So that a respective key can open a respective lock cylinder, the key must first be
configured with such an exact fit to the keyway of the cylinder core that at least an
introduction region of its key shaft can be introduced into the keyway. The rotation
of the cylinder core in the cylinder housing for opening the lock cylinder is,
however, initially prevented by the tumblers which are as a rule preloaded into a
position blocking the cylinder core with respect to the cylinder housing. Only when
the shaft profile of the key acts on the tumblers and thus displaces them into a
releasing position can the cylinder core be rotated in the cylinder housing so that
the lock cylinder can be opened.
In this respect, the dimension by which a respective tumbler has to be displaced to
achieve the releasing position can vary from tumbler to tumbler. For this purpose,
different tumblers which differ, for example, in their lengths or in the size of a cut-
out or in another manner and thus have respective different release positions can
be inserted into the tumbler receivers which are provided in the cylinder core and
in the cylinder housing. In this manner, different lock cylinders can be encoded
differently with an otherwise like configuration by the fitting with different
combinations of different tumblers.
Whether a respective key is suitable to open a lock cylinder then depends on
whether the shaft profile has a suitable configuration to act on the tumblers of the
lock cylinder exactly such that all the tumblers are displaced into a respective
release position. The key can thus be encoded for one lock cylinder (or also for a
plurality of lock cylinders) by the specific configuration of the shaft profile. The so-
called secret code is therefore encoded in the shaft profile of the key in such keys.
The shaft profile alone is, however, not sufficient to ensure that all the tumblers are
displaced into the respective releasing position. For this purpose, the shaft profile
also has to be correctly aligned relative to the tumblers, in particular along the key
axis or key introduction direction. A key fitting into the keyway can generally be
introduced into the keyway at different depths within the keyway. The tumblers
are, however, only displaced into the respective release position and thus only
release the cylinder core for a rotation when the key is introduced into the keyway
to the correct axial introduction depth and is thus aligned exactly relative to the
tumblers such that regions of the shaft profile corresponding to a respective
tumbler act on this respective tumbler.
It is therefore necessary to fix the correct axial introduction depth by the
cooperation of the key and of the lock cylinder. The key bow, which projects out of
the keyway on a completely introduced key and which is typically widened with
respect to the key shaft for a better gripping of the key, can for this purpose
typically form one or more abutments which abut the lock cylinder, for example, an
end side of the cylinder core and/or of the cylinder housing, from the outside.
Alternatively or additionally, the key tip, i.e. the end of the key shaft opposite the
key bow, can also abut the end of the keyway opposite the key introduction
opening. Such abutments are particularly easy to produce since only one or more
simple edges have to be provided at the key bow or the key shaft only has to have
a specific length.
However, this is accompanied by the fact that such keys can be copied relatively
simply. Key blanks adapted for a respective lock system, for instance, can thus
already have the required abutments at the key bow and/or a key shaft of the
required length. Only the shaft profile then has to be transferred onto an initially
non-profiled encoding section of the key shaft of a key blank for a key copy. This
can take place in a largely automated manner in a copying machine. For this
purpose, the original keys to be copied and a key blank matching it are clamped
into the machine which then traces the vertical extent of the shaft profile of the
original key and synchronously to this cuts the same vertical extent as a shaft
profile into the encoding section of the key shaft of the key blank or drills it for
dimple keys in which the shaft profile is located at the broad side or broad sides of
the key shaft.
So that the copied shaft profile is applied axially correctly to the key blank, such a
copying machine can have respective abutment surfaces at which the abutments
of both the original key and of the key blank are aligned. It is achieved in this
manner that the key copy produced from the key blank as a result has the same
alignment of the shaft profile to the abutments as the original key. The simple
copying ability of such keys reduces the security of the locking system.
It is therefore an object of the invention to provide a locking system, a key and a
key blank which offer increased security and whose copying ability is made more
difficult.
The object is satisfied by a locking system having the features of claim 1. In
particular, an abutment section is formed at the key shaft between the key bow
and the shaft profile, said abutment section having an abutment profile i.e. a
dimension difference, in the axial direction. The abutment profile comprises at
least one projection aligned in the key introduction direction and an undercut
formed between the projection and the shaft profile. The lock cylinder furthermore
comprises a movable counter-abutment, wherein the abutment section of the key
and the movable counter-abutment of the lock cylinder are advantageously
arranged and configured such that, on the introduction of the key into the keyway,
at least one abutment surface of the abutment section (e.g. an abutment surface
of the projection and/or of the undercut) abuts the movable counter-abutment of
the lock cylinder and in so doing forms the only active abutment formed at the key
for limiting the introduction of the key into the keyway to a correct axial introduction
depth. In this respect, the projection or the undercut or both can be active as an
abutment or as abutments.
In addition to the shaft profile, a further profile is therefore provided, namely said
abutment profile at the key, which, unlike the shaft profile, does not serve to act on
the tumblers in accordance with the secret code, but rather to fix the introduction
depth of the key in the keyway. The fact that a section of the key shaft has a
profile means in this respect that the surface contour of this section varies in its
height along the extent of the respective profiled section in a direction
perpendicular to the extent and in so doing increases in size at least once and
decreases in size at least once. Since the shaft profile extends along the key axis,
its vertical extent therefore varies in the radial direction. This can be the case, for
example, in the manner of notches or dimples. The vertical extent thus varies in
the axial direction in the abutment profile which is preferably aligned radially or
substantially radially to the key axis. The abutment profile consequently has at
least one axially aligned projection and one undercut. The vertical extent of a
respective profile can be configured in different manners, for example at least
sectionally constant, stepped, linear or increasing or decreasing in a different
manner. The profile can be produced by simple cutting out, for example. Different
means are, however, also conceivable. The projection of the abutment profile can
thus, for instance, be formed as a pin or as tongue which is connected to the key
shaft.
The provision of an abutment profile makes the copying of such a key using
conventional cutting machines substantially more difficult. Since the projection is
aligned in the key introduction direction and consequently the undercut is also
aligned substantially axially to the key axis, the abutment profile cannot be cut out
of the same direction as the shaft profile which extends axially and whose vertical
extent therefore varies radially. The forming of the undercut is thus in particular not
possible in a simple manner.
It is furthermore a major aspect of the invention that the explained abutment
section does not abut an outer surface of the lock cylinder, but rather cooperates
with the movable counter-abutment within the keyway. In this manner, the
reference point for the axial position of the shaft profile is displaced into the
cylinder core. The copying of such key using conventional copying machines
which are designed for a reference point at the end side of the cylinder core is also
hereby made difficult.
Furthermore, in accordance with the invention, it is not only the reference point
which is made deeper with respect to the end side of the cylinder core, is namely
displaced into the interior of the cylinder core, but a special counter-abutment is
rather also provided. Instead of a static counter-abutment provided at the cylinder
core itself and/or at the cylinder housing, the counter-abutment is namely
configured as movable in accordance with the invention. This movability
advantageously makes it possible that the introduction depth of the key can be
dependent on the position of the movable counter-abutment. This can be utilized
for a further increase in the security of the locking system as will be explained
further below. In addition, the copying of the key is made even more difficult by
such a variable reference point. Due to its movability, the counter-abutment
furthermore does not hinder the sliding along of the shaft profile of the key shaft
disposed upstream of the abutment section.
So that the cooperation of the abutment section with the movable counter-
abutment can have an advantageous effect in the explained manner, it is
important that the key also does not abut the lock cylinder outside the keyway and
also does not abut a static element within the keyway. For otherwise at least one
further reference point would be present for the axial position of the shaft profile
which would again simplify the more difficult copying of the key.
It is therefore advantageous that the abutment section or one or more abutment
surfaces of the abutment section forms the only effective abutment formed at the
key for limiting the introduction of the key into the keyway to a correct axial
introduction depth in order hereby to ensure the correct interaction of the shaft
profile with the tumblers. However, this does not preclude the fact that in general
further abutments are provided at the key, for instance in the form of exposed
features which may e.g. be necessary or useful in the manufacture of the key, but
which are not active as abutments when the key is introduced into the keyway.
The key can additionally - for example with a so-called reversible key whose key
shaft is radially symmetrical to allow an introduction of the key into the keyway in
two different rotational orientations of the key - generally have further abutment
sections which can equally abut the movable counter-abutment within the keyway.
However, only a respective one of these abutment sections forms the active
abutment, i.e. the abutment actually abutting the movable counter-abutment of the
lock cylinder on the introduction of the key into the keyway.
In accordance with an advantageous embodiment, the movable counter-abutment
is supported in the cylinder core displaceable radially to the keyway. The abutment
is consequently supported displaceable radially to the key axis with a key
introduced into the keyway. In this manner, the forces acting on the movable
counter-abutment on the abutment of the abutment section at the movable
counter-abutment are directed in a different direction (namely axially) than the
direction of movability of the counter-abutment (namely radially) so that the
counter-abutment is not unintentionally displaced by the abutment itself.
The movable counter-abutment is preferably preloaded along said radial direction
toward the keyway, for example by means of a compression spring likewise
received in the cylinder core.
The movable counter-abutment is preferably formed as one of the tumblers of the
lock cylinder, in particular as the tumbler arranged closest to the key introduction
opening of the keyway. No separate movable counter-abutment thus has to be
provided in addition to the tumblers provided for the locking function so that the
lock cylinder can be particularly simple and/or compact. The tumblers can be pin
tumblers which have a respective core pin and a housing pin which are arranged
in the releasing position of the respective pin tumbler just completely in the
cylinder core or in the cylinder housing so that their common boundary surface
coincides with the common boundary surface of the cylinder core and the cylinder
housing and the tumbler therefore releases the cylinder core for a rotation with
respect to the cylinder housing. The tumblers can, however, also be disk tumblers
or other types of tumblers.
The movable counter-abutment can, however, alternatively also only be formed
(similar to the core pin of a pin tumbler) as a cylindrical pin or the like which is
displaceable radially to the keyway and is preferably preloaded in a radial
direction, but without cooperating with a housing pin or otherwise having the
blocking function of a pin tumbler.
The abutment section is preferably aligned radially, i.e. perpendicular, to the key
axis. It is, however, not absolutely necessary that the abutment section or the at
least one abutment surface is aligned exactly perpendicular to the key axis. It is
rather sufficient that the abutment section is aligned at least sectionally
substantially radial to the key axis such that it can absorb the axial forces
occurring on the abutment at the movable counter-abutment without substantial
radial force actions occurring by which, for instance, the preferably radially
movable counter-abutment could be displaced.
In a preferred embodiment, the shaft profile and the abutment section are aligned
at least regionally radially in the same direction relative to the key axis. The shaft
profile and the abutment section can in particular substantially form an L-shape
aligned in a common radial direction in a side view. When the movable counter-
abutment is configured as a tumbler, such a design in particular simplifies the
cooperation of both the shaft profile and of the abutment section with this tumbler.
This in particular applies to keys whose shaft profile is formed as notches at a
narrow side of the key shaft. In contrast, it can be advantageous with dimple keys
whose shaft profile is formed as dimples at a broad side of the key shaft if the
abutment section is formed at a narrow side of the key shaft, that is if the shaft
profile and the abutment section are aligned radially in respective directions
perpendicular to one another with respect to the key axis.
The key can have an introduction region which can be introduced into the keyway
of the lock cylinder and has an outer region adjacent thereto, wherein the
abutment section is formed completely within the introduction region of the key.
The introduction region is consequently defined such that it - unlike said outer
region of the key - is located within the keyway when the key is completely
introduced into the keyway, i.e. when the key is introduced into the keyway to the
correct axial introduction depth to displace all the tumblers into the respective
releasing position. The introduction region of the key can, for example, have a
special cross-section which corresponds to the cross-section of the keyway
perpendicular to the key introduction direction. The axial extent of the introduction
region with respect to the key axis in particular exactly corresponds to the correct
axial introduction depth of the key which is predetermined by the cooperation of
the abutment section with the movable counter-abutment.
It is furthermore advantageous if the abutment section of the key and the movable
counter-abutment of the lock cylinder are arranged such that the key bow is
spaced apart from the lock cylinder (in particular from an end side of the cylinder
housing or of the cylinder core) when the key is introduced into the keyway up to
the correct axial introduction depth (as is predetermined by the cooperation of the
abutment section with the movable counter-abutment). The key bow is therefore in
particular located completely in said outer region of the key. The key bow, which is
typically radially widened with respect to the key shaft to be able to be gripped
better, furthermore does not form an abutment in this manner, for instance for an
end side of the lock cylinder. It is thus ensured that the key bow cannot represent
any reference point for the axial position of the shaft profile which simplifies the
copying of the key.
In accordance with an advantageous embodiment, the shaft profile is formed as an
arrangement of a plurality of notches. With such notches, the vertical extent of the
profile increases or decreases continuously section-wise, with all increases and/or
all decreases optionally being able to take place at the same pitch angle. The
tumblers can advantageously be urged into a respective position in the radial
direction due to the notches with their angled flanks despite the axial introduction
movement of the key with respect to the key axis. Alternatively or additionally to
this, the shaft profile can also comprise an arrangement of a plurality of dimples.
The abutment profile is in contrast preferably formed as a step or as an
arrangement of a plurality of steps (in particular two steps) in which the vertical
extent of the profile is stepped, that it is sectionally constant, and changes abruptly
between these sections. The steps of constant height are then in particular aligned
exactly perpendicular to the axial introduction movement of the key and are
therefore particularly suitable as abutment surfaces. For example, said projection
can have an end side extending perpendicular to the key axis, with the base of
said undercut being able to form a further end side in the sense of a bottom of the
corresponding step which in particular likewise extends perpendicular to the key
axis. Provided that said projection has a plurality of steps, the abutment profile can
have a plurality of end sides extending perpendicular to the key axis, but offset
from one another in the axial direction, with said undercut being provided between
the projection and the key shaft or the shaft profile. The profile of this undercut can
likewise be stepped in accordance with the plurality of steps. In general, each of
these plurality of end sides of the abutment section can serve as an abutment
surface for abutting the movable counter-abutment. This is, however, not
absolutely necessary. It is rather sufficient - and can also be of advantage - if only
a single one of a plurality of end sides of the abutment section is active as an
abutment surface.
Said abutment surface of the abutment section can generally be provided at the
projection or at the undercut, or both at the projection and at the undercut of the
abutment profile. In the last-named case, in particular two or more abutment
surfaces offset relative to one another are provided and are active together as the
abutment.
The abutment profile can in particular have at least one end side which is aligned
perpendicular to the key axis and which forms said abutment surface or one of a
plurality of abutment surfaces for abutting the movable counter-abutment of the
lock cylinder. Such an end side or abutment surface can be provided at the
projection of the abutment profile, for example. Provision can alternatively or
additionally be made that the undercut has at least one end side which is aligned
perpendicular to the key axis (for example at the base of the undercut) and which
forms an abutment surface for abutting the movable counter-abutment of the lock
cylinder.
In accordance with a further embodiment, the abutment profile can have at least
two projections. These projections can be arranged next to one another and/or
aligned in parallel with one another. The projections can furthermore be of equal
length or of different length. Alternatively or additionally to the at least two
projections, the abutment profile can have at least two undercuts. In such an
embodiment, the complexity of the abutment profile is increased. The copying of
the key is thereby advantageously made more difficult.
In a preferred embodiment, the movable counter-abutment of the lock cylinder has
a counter-profile for cooperating with the abutment profile of the key. The counter-
profile is in particular configured such that it is aligned in parallel with the abutment
profile with a key introduced into the keyway. A stable abutment effect is achieved
in this manner. The movable counter-abutment, which is configured as a pin
tumbler, for example, is preferably aligned perpendicular to the key introduction
direction in this respect. The counter-profile then preferably has an extent varying
in the key introduction direction.
The counter-profile can in particular have an annular groove or a plurality of
annular grooves whose respective cross-sections can differ in their size, depth and
shape when the movable counter-abutment is a pin tumbler. Such annular grooves
can be produced in a constructively simple manner.
The counter-profile of the movable counter-abutment is preferably configured
completely or only regionally (i.e. only in a part region of the projection and
undercut) complementary to the abutment profile of the key. The abutment profile
and the counter-profile therefore have a vertical extent in the respective region
which corresponds to the inverse of the respective other one. The counter-profile
has a projection, for example, where the abutment profile has an undercut, and
vice versa. When the abutment profile and the counter-profile are configured
completely complementary, that is can come to lie substantially seamlessly at one
another, a particularly large common contact area can thereby advantageously be
formed.
However, the profiles are not necessarily completely complementary with one
another. In accordance with an advantageous embodiment, the abutment profile of
the key can only be configured regionally complementary to the counter-profile of
the movable counter-abutment. This can be realized, for example, in that the
respective extents of the profiles correspond in quality, but not necessary also in
quantity everywhere. This is the case, for example, when the position of an
elevated portion in the one profile corresponds to the position of a recess in the
other profile, but the height of this elevated portion does not correspond to the
depth of this recess. In such an embodiment, the abutment profile does not
contact the counter-profile completely flush, but only sectionally, with a key
introduced into the keyway to the correct axial introduction depth. The abutment
profile can, for example, only contact the counter-profile with the projection, but not
with the base of the undercut, or only with the base of the undercut, but not with
the projection. This has the advantage that it cannot be seen from the key alone
which sections of the abutment profile actually abut the counter-profile and thus
represent a reference point for the correct axial position of the shaft profile. The
actual reference point can thus be masked to make a copying of the key even
more difficult. Different abutment profiles and in particular different abutment
surfaces at the different keys can furthermore still be used in different lock
cylinders within a locking system in order thus to increase the system versatility.
It is in particular preferred with such an embodiment if the abutment profile is only
configured regionally complementary to the counter-profile such that when the
abutment section abuts the movable counter-abutment, only an end side of the
projection, but not a base of the undercut set back with respect to the end side,
contacts the movable counter-abutment as an abutment surface and hereby forms
said only active abutment for limiting the introduction of the key to the correct axial
introduction depth. The projection of the abutment section can, for example,
engage into said annular groove of the movable counter-abutment and can abut a
peripheral surface of the base of the annular groove, with a collar of the movable
counter-abutment bounding the annular groove admittedly engaging into the
undercut of the abutment section, but not contacting the base of the undercut. In
other words, with such an embodiment, the projection projects further with respect
to the base of the undercut than the collar of the movable counter-abutment with
respect to the base of the annular groove. It is hereby particularly difficult
subsequently to reproduce the abutment profile by means of manual reworking
after an automatic copying of the key by means of a cutting machine since, for
example, the reference point for the correct removal depth is missing when the
projection is filed off.
It is, however, conversely possible that the abutment profile is configured only
regionally complementary to the counter-profile such that when the abutment
section abuts the movable counter-abutment, only a base of the undercut set back
with respect to the projection, but not an end side of the projection, contacts the
movable counter-abutment as an abutment surface so that only the base of the
undercut of the abutment section forms said only active abutment which defines
the correct axial introduction depth on the introduction of the key into the keyway.
Since a counter-profile is provided with which the abutment profile cooperates on
the abutment of the abutment section at the movable counter-abutment, an
extended secret code can be encoded. For the abutment profile and the counter-
profile can be configured such that the introduction of the key is limited exactly to
the correct axial introduction depth in which the key opens the lock cylinder only
when the abutment profile and the counter-profile cooperate in a suitable manner -
which depends on the presence of a key with the correct abutment profile for a
respective lock cylinder.
It is preferred in this connection if the abutment profile and the counter-profile are
configured such that they interlock on an abutment of the abutment section at the
movable counter-abutment at least regionally (i.e. completely or only regionally).
The actual interlocking in this respect depends on whether the key has the
abutment profile matching the counter-profile of the movable counter-abutment.
Only if this is the case is it ensured that the abutment profile and the counter-
profile interlock in a correct manner. Otherwise the key abuts on the introduction
into the keyway at an introduction depth in which it - despite a possible correct
shaft profile - cannot open the lock cylinder due to the incorrect axial alignment of
the shaft profile relative to the tumblers. This advantageously also applies to a
copied key whose abutment profile does not exactly coincide with the abutment
profile of the original key.
In accordance with an advantageous embodiment, the shaft profile is formed such
that, on an introduction of the key into the keyway, the movable counter-abutment
is aligned for an interlocking of the counter-profile and of the abutment profile, in
particular in a direction radial to the key axis. Even if the abutment profile formed
at a key and the counter-profile of the movable counter-abutment are configured to
match one another, it will depend on the position of the movable abutment, for
example displaceable within the cylinder core, whether the abutment profile and
the counter-profile are aligned relative to one another such that they can actually
interlock. On an introduction of the key into the keyway, the movable counter-
abutment can be acted on, for example, by the shaft profile and can thereby
change its position. If the movable counter-abutment is configured as one of the
tumblers, the shaft profile can, for instance, advantageously be configured exactly
with respect to the abutment profile and to the counter-profile such that the
movable counter-abutment adopts that position, at the latest just before the
abutment profile reaches the counter-profile, in which the abutment profile and the
counter-profile can interlock with an exact fit. The security of the locking system is
increased due to this complex interplay of the shaft profile, abutment profile and
counter-profile and the copying of the key is made more difficult, in particular when
copying without knowledge of the counter-profile of the movable counter abutment.
Described herein is a key for use with a lock cylinder in a locking system in
accordance with one of the described embodiments. In this respect, the key can
have a key bow and a key shaft which extends, starting from the key bow, along a
key axis in a key introduction direction and has a shaft profile for acting on
tumblers received in the lock cylinder. An abutment section can furthermore be
formed between the key bow and the shaft profile, said abutment section having
an abutment profile having at least one projection aligned in the key introduction
direction and having an undercut formed between the projection and the shaft
profile. The abutment section in particular forms the only active abutment formed
at the key for limiting the introduction of the key into a keyway of the lock cylinder
to a correct axial introduction depth. The advantages of such a key named above
in connection with the locking system in accordance with the invention, in
particular the key's more difficult copying ability, also result independently of the
respective associated lock cylinder.
The abutment section of the key can be aligned radially to the key axis. The shaft
profile and the abutment section can furthermore be aligned radially in the same
direction or in respective directions perpendicular to one another relative to the key
axis. It is furthermore preferred if the key has an introduction region which can be
introduced into the keyway of the lock cylinder and an outer region which is
adjacent thereto and the abutment section is formed completely within the
introduction region. The abutment section of the key can have at least one
abutment surface for abutting a counter-abutment of the associated lock cylinder,
with the abutment surface being provided at the projection and/or at the undercut
of the abutment profile.
Also described herein is a key blank for manufacturing such a key. In this respect,
the key blank has a key bow and a key shaft which extends, starting from the key
bow, along a key axis in a key introduction direction and the key blank has an
encoding section for forming a shaft profile for acting on tumblers received in the
lock cylinder. An abutment section is furthermore formed at the key shaft between
the key bow and the encoding section, said abutment section having an abutment
profile having at least one projection aligned in the key introduction direction and
having an undercut formed between the projection and the encoding section. This
abutment section forms the only active abutment present at the key blank for
limiting the introduction of a key produced from the key blank into a keyway of the
lock cylinder to a correct axial introduction depth.
The key blank therefore substantially differs from the previously described key in
that instead of the shaft profile an encoding section is provided from which the
shaft profile is only formed, for example by cutting or drilling, on the manufacture
of a key from the key blank. The abutment profile can in this respect have one or
more of the features (singly or in combination) which were described above in
connection with the abutment profile of a key in accordance with the invention or of
the key of a locking system in accordance with the invention, from which the
advantages named there result.
The abutment section of the key blank can be aligned radially to the key axis. The
encoding section and the abutment section can furthermore be aligned radially in
the same direction or in respective directions perpendicular to one another relative
to the key axis. It is furthermore preferred if the key blank has an introduction
region provided for introduction into the keyway of the lock cylinder and an outer
region which is adjacent thereto and the abutment section is formed completely
within the introduction region. The abutment section of the key blank can have at
least one abutment surface for abutting a counter-abutment of the associated lock
cylinder, with the abutment surface being provided at the projection and/or at the
undercut of the abutment profile.
The invention will be described in more detail in the following only by way of
example with reference to the drawings.
Fig. 1 shows an embodiment of a part of a locking system in accordance
with the invention in a schematic cross-sectional view;
Fig. 2 shows the key of the locking system shown in Fig. 1;
Fig. 3 shows an embodiment of the core pin of the movable counter-
abutment formed as a tumbler of the lock cylinder of a locking
system in accordance with the invention;
Figs. 4 to 6 show the key shaft, the movable counter-abutment formed as a
tumbler and a further tumbler of a respective embodiment of a
locking system in accordance with the invention;
Fig. 7 shows the key shaft of an embodiment of a key in accordance with
the invention with a detailed view of the abutment section of this
embodiment and with corresponding detail views of further
embodiments;
Fig. 8 shows detailed views of a respective abutment section and of a
respective movable counter-abutment configured as a tumbler of
further embodiments; and
Fig. 9 shows an embodiment of a key blank in accordance with the
invention.
Fig. 1 shows a substantially cylindrical cylinder core 13 and a movable counter-
abutment 15 of a lock cylinder 11 of a locking system in accordance with the
invention. The movable counter-abutment 15 is configured as a pin tumbler, with
only the core pin thereof, but not the associated housing pin being shown. The
movable counter-abutment 15 could, however, also be configured without a
housing pin or also completely differently in the embodiments shown. The locking
system furthermore comprises a key 17 which is shown introduced into the
cylinder core 13. The tumbler 15 is displaceably supported in the one of a plurality
of tumbler receivers 21 in the cylinder core 13 closest to a key introduction
opening 19 of the cylinder core 13, and is displaceable radially to the cylinder axis
Z of the cylinder core 13. The movable counter-abutment is in this respect the first
tumbler 15 of the lock cylinder 11. Further tumblers 23 (not shown here, cf. Figs. 4
to 6) are received in the remaining tumbler receivers 21. In this respect, the first
tumbler 15 and the further tumblers 23 can be formed substantially the same, that
is can have approximately the same diameter. Optionally, the movable counter-
abutment 15 configured as a tumbler can, however, also differ, for instance, in its
dimensions from the further tumblers 23 and can, for example, be smaller in
diameter.
The key 17 is introduced into a keyway 25 of the cylinder core 13. In this
introduced state, the key 17 acts on the first tumbler 15 which is preloaded radially
toward the keyway 25 such that the first tumbler 15 is urged radially against the
preload radially outwardly into a position in which the core pin 17 terminates flush
with the cylinder core 13 and thus releases it for a rotation about its cylinder axis Z
with respect to the cylinder housing, not shown, of the lock cylinder 11.
As can be more clearly recognized in the individual representation of the key 17 in
Fig. 2, the key 17 comprises a key bow 27 from where a key shaft 29 extends
along the key axis S in a key introduction direction (arrow to the right). The key
shaft 29 has a shaft profile 31, which extends in parallel with the key axis S, in the
form of a plurality of notches 33 in which the secret code of the key 17 is encoded
and which are suitable to act on the first and the further tumblers 15, 23 on an
introduction of the key 17 into the keyway 25 and thereby to displace them radially.
An abutment section 35 is formed at the key shaft 29 between the key bow 27 and
the shaft profile 31. The abutment section 35 has an abutment profile 37 in the
form of a projection 39 aligned in the key introduction direction (arrow) and in the
form of an undercut 41 formed between the projection 39 and the shaft profile 31
so that the abutment profile 37 is stepped (cf. in particular Fig. 7). Both the end
side of the projection 39 preferably aligned perpendicular to the key axis S and the
base of the undercut 41 preferably aligned perpendicular to the key axis S face in
the key introduction direction and can thus serve (individually or together) as a
respective abutment surface for abutting the first tumbler 15. The abutment section
extends, starting from the shaft profile 31, radially to the key axis S away from it
in the same radial direction in which the shaft profile 31 is also aligned
(downwardly in the Figures). In this manner, the shaft profile 31 and the abutment
section 35 substantially form an L shape.
As is shown in Fig. 1, on an introduction of the key 17 into the keyway 25, the
abutment section 35 abuts the first tumbler 15 within the keyway 25 so that the
introduction of the key 17 is thereby limited to the shown correct axial introduction
depth at which the tumblers 15, 23 release the cylinder core 13 for a rotation with
respect to the cylinder housing. The abutment element 35 in this respect
represents an abutment of the key 17 at which otherwise no abutments are
provided for abutting elements of the lock cylinder 11 and for limiting the
introduction of the key 17.
The key 17 has an introduction region 43 and adjacent thereto an outer region 45
which are delineated from one another by a chain-dotted line in Fig. 2 for
illustration purposes. The introduction region 43 can be introduced into the keyway
of the lock cylinder 11. In contrast, the outer region 45 remains outside the
keyway 25, as can be seen in Fig. 1, even with a key 17 introduced into the
keyway 25 to the correct axial introduction depth. In this respect, the abutment
section 35 is formed completely within the introduction region 43 to be able to abut
the first tumbler 15 within the keyway 25. The key bow 27 is, in contrast, part of
the outer region 45 and is moreover arranged such that it is spaced apart from the
lock cylinder 11 with a key 17 introduced into the keyway 25 up to the correct axial
introduction depth.
An embodiment of a movable counter-abutment 15 is shown in Fig. 3 which is
configured as a core pin of the first tumbler and which substantially corresponds to
the embodiment shown in Fig. 1, but is a little longer. The core pin 15 is
substantially cylindrical with an obtusely angled conical tip 47. Separated from the
tip 47 by a collar 49, the core pin 15 has a peripheral constriction in the form of an
annular groove 51. The core pin 15 thus always has the same vertical extent
independently of its rotational position within its tumbler receiver 21 (cf. Fig. 1)
toward the key introduction opening 19 of the keyway 25 and can in this manner
form a counter-profile 53 for cooperating with the abutment profile 37 of the key
In this respect, the annular groove 51 and the collar 49 of the first tumbler 15 are
formed to this extent complementary to the projection 39 and to the undercut 41 of
the abutment profile 37 shown in Figs. 1 and 2 in that the widths of the projection
39 and of the annular groove 51 coincide and the widths of the undercut 41 and of
the collar 49 coincide such that the projection 39 exactly fits into the annular
groove 51 and the collar 49 exactly fits into the undercut 41. In this manner, the
abutment profile 37 and the counter-profile 53 interlock on an abutment of the
abutment section 35 at the first tumbler 15. However, this is only possible when
the first tumbler 15 adopts the position in its tumbler receiver 21 which is correct
and which is radial with respect to the cylinder axis Z, in which position the core
pin 15 does not block the cylinder core 13 (cf. Fig. 1). This is achieved in that the
shaft profile 31 is configured accordingly and urges the core pin 15 into the shown
releasing position within its tumbler receiver 21 on an introduction of the key 17
into the keyway 25, at the latest directly before the abutment profile 37 reaches the
counter-profile 53.
The key shaft 29 of a key 17 in accordance with the invention and the movable
counter-abutment 15 configured as a core pin of the first tumbler as well as the
core pin of a further tumbler 23 are each shown in different embodiments in Figs. 4
to 6. In this respect, the embodiments substantially differ by the different
configuration of the abutment profile 37 and of the counter-profile 53. The key 17
and the core pins 15, 23 are each shown in the position in which they are arranged
when the key 17 is introduced into the keyway 25 up to the abutment of the
abutment section 35 at the first tumbler 15.
The abutment profile 37 of the embodiment shown in Fig. 4 has two projections 39
and two undercuts 41 (cf. also Fig. 7, second detailed view from the left). The
counter-profile 53 at the core pin of the first tumbler 15 is configured as two
annular grooves 51 of a corresponding width with adjacent collars 49. The two
profiles 37, 53 are thus formed complementary to one another and can interlock.
The introduction of the key 17 into the keyway 25 is thereby exactly limited to the
correct axial introduction depth in which the shaft profile 31 is aligned relative to
the tumblers 15, 23 such that it urges all the tumblers 15, 23 (of which only two are
shown by way of example) into their releasing position. This releasing position can
be recognized in Figs. 4 to 6 in that the end of the respective core pin 15, 23
opposite the tip 47 terminates exactly flush with the jacket surface 55 of the
cylinder core 13 (which is only indicated by a line marking the jacket surface 55 in
Figs. 4 to 6).
In contrast, in Figs. 5a and 6a, not all of the tumblers 15, 23 are urged into their
respective releasing positions. This is due to the fact that the abutment profiles 37
of the embodiments shown in Figs. 5a and 6a are not configured in a suitable
manner for cooperating with the counter-profile 53 of the first tumbler 15 which
corresponds to the first tumbler 15 shown in Fig. 1. This can have the
consequence, as shown, that the abutment section 35 abuts the first tumbler 15
before the key 17 has been introduced so far into the keyway 25 that the shaft
profile 31 urges all the tumblers 15, 23 into their respective release positions. In
Figs. 5a and 6a, the further tumbler 23 therefore projects beyond the jacket
surface 55 of the cylinder core 13 and thus prevents an opening of the lock
cylinder 11. It can be recognized from this that a part of the secret code of the
locking system can also be encoded in the abutment profile 37 (or in the counter-
profile 53) in addition to the shaft profile 31 (or the length of the core pins of the
tumblers 15, 23).
The embodiments shown in Figs. 5b and 6b differ from those in Figs. 5a and 6a in
that the respective counter-profile 53 of the core pin of the first tumbler 15 does
not correspond to the counter-profile of the core pin 15 in Fig. 4, but only has an
annular groove 51. The annular groove 51 is in this respect formed in its
respective axial position and width such that it exactly corresponds to the
projection 39 of the respective abutment profile 37. In other words, the respective
abutment profile 37 of the key 17 in Figs. 5b and 6b (as already in Fig. 4) matches
the respective counter-abutment 53 of the first tumbler 15 of the lock cylinder 11
and can therefore open the lock cylinder 11.
Further embodiments of the abutment profile 37 in a plurality of detail views are
shown by way of example in Fig. 7. In this respect, the region of the key shaft 29
which is marked by the circle (top) and which comprises the abutment section 35
is shown magnified in each case. It can be recognized from the examples that the
abutment profile 37 can differ with respect to the number of projections 39 and
undercuts 41 as well as with respect to their respective positions and widths. The
abutment profiles 37 are admittedly each formed as steps (with the exception of
the undercut 41 of the second detailed view from the right) in Fig. 7. The abutment
profiles 37 can, however, generally also differ with respect to their shapes.
A further embodiment is shown in the left hand detail view of Fig. 8 in which the
abutment profile 37 of the key 17 and the counter-profile 53 of the movable
counter-abutment 15 are admittedly complementary with respect to the sequence
of elevated portions and recesses along the extent of the abutment element 35
radial to the key axis S (cf. Fig. 2) or along the core pin axis K, but not with respect
to the respective dimension of the elevated portions and recesses. For the
projection 39 of the abutment profile 37 extends further forward than the annular
groove 51 of the counter-profile 53 is deep. Nevertheless, the abutment profile 37
and the counter-profile 53 can interlock and can limit as an abutment the
introduction of the key 17 into the keyway 25 (cf. Fig. 1) to a correct axial
introduction depth. Such differences from an also quantitatively exact
complementary design of the abutment profile 37 and of the counter-abutment
profile 53 can be used directly to mask the actual reference point active as an
abutment for the correct alignment of the shaft profile 31 and thus to make a
copying of the key 17 more difficult.
The two other detailed views of Fig. 8 (middle and right) show two further
embodiments in which, as in the embodiment shown at the left, no completely
complementary configuration of the abutment profile 37 and of the counter-profile
53 is provided, but the projection 39 rather projects further than the annular groove
51 is deep so that the collar 49 does not abut the base of the undercut 41.
However, in these embodiments, the respective profiles 37, 53 of the abutment
section 35 and of the movable counter-abutment 15 are more complex in this
respect since the projection 39 does not have a constant height, but is rather of a
two-step design, since a section of the projection 39 (the lower in the middle
representation and the upper in the right hand representation) extends further in
the key introduction direction (cf. Fig. 2) than the other projection 39. The
projection 39 thus has two end sides which extend perpendicular to the key axis,
but are mutually offset in the axial direction. In a corresponding manner, the
annular groove 51 of the counter-profile 53 is likewise configured in two steps at
the movable counter-abutment 15 in a matching manner thereto. These
embodiments further illustrate the variation possibilities in the design of the
abutment profile 37 and of the counter-profile 53.
An embodiment of a key blank 57 in accordance with the invention for
manufacturing a key 17 for use with a lock cylinder 11 in a locking system is
shown in Fig. 9. The key blank 57 substantially differs from the key 17 shown in
Fig. 2 in that it does not have any shaft profile 31 at the key shaft 29, but rather
has an encoding section 59 in its place. This encoding section 59 is provided to be
provided with a shaft profile 31 in the manufacture of a key 17 from the key blank
The key blank 57 also has an abutment section 35 which is suitable for forming an
abutment profile 37. In the embodiment of the key blank 57 shown in Fig. 9, the
abutment section 35 already has an abutment profile 37 with a projection 39 and
an undercut 41 formed between the projection 39 and the encoding section 59.
The abutment section 35 of the key blank 57 could, however, also be blank
initially, that is without an abutment profile 37 which is only formed on the
manufacture of a key 17 from the key blank 57. Provision can additionally be made
that the already present abutment profile 37 has to be changed or supplemented
in the manufacture of a key 17 from the key blank 57 in order to match a specific
counter-profile 53 in a lock cylinder 11. Further projections 39 and/or undercuts 41
may, for example, have to be added in the abutment section 35.
Like the key 17 shown in Fig. 2, the key blank 57 also has an introduction region
43 which is provided for introduction into the keyway 25 of the lock cylinder 11 and
it has an outer region 45 adjacent thereto. The introduction region 43 and the outer
region 45 are separated from one another by a chain-dotted line in Fig. 9. The
abutment section 35 is in this respect located in the introduction region 43. In the
introduction region 43, and preferably only in this region and not also in the outer
region 45, the key shaft 29 of the key blank 57 can have a cross-section which
differs form a simple rectangle due, for example, to longitudinal recesses formed
therein, said cross-section being able to be matched to a corresponding cross-
section of the keyway 25 of a lock cylinder 11 which a key 17 produced from the
key blank 57 should be able to open.
Reference numeral list
11 lock cylinder
13 cylinder core
15 movable counter-abutment, core pin of the first tumbler
17 key
19 key introduction opening
21 tumbler receiver
23 core pin of a further tumbler
25 keyway
27 key bow
29 key shaft
31 shaft profile
33 notch
35 abutment section
37 abutment profile
39 projection
41 undercut
43 introduction region
45 outer region
47 tip
49 collar
51 annular groove
53 counter-profile
55 jacket surface
57 key blank
59 encoding section
K core pin axis
S key axis
Z cylinder axis
Claims (21)
1. A locking system comprising: - a lock cylinder which has a cylinder housing, a cylinder core rotatably supported in the cylinder housing and having a keyway, and has a plurality of tumblers which partly project into the keyway; and further 10 comprising - a key which has a key bow and a key shaft which extends, starting from the key bow, along a key axis in a key introduction direction and has a shaft profile for acting on the tumblers; wherein an abutment section is formed at the key shaft between the key 15 bow and the shaft profile and has an abutment profile having at least one projection aligned in the key introduction direction and having an undercut formed between the projection and the shaft profile; wherein the lock cylinder comprises a movable counter-abutment; and wherein the abutment section of the key and the movable counter-abutment 20 of the lock cylinder are arranged and configured such that, on an introduction of the key into the keyway, the abutment section abuts the movable counter-abutment with at least one abutment surface within the keyway and in so doing forms the only active abutment formed at the key for limiting the introduction of the key into the keyway to a correct axial 25 introduction depth.
2. A locking system in accordance with claim 1, wherein the movable counter-abutment is supported in the cylinder core radially displaceable to the keyway. 5
3. A locking system in accordance with claim 1 or claim 2, wherein the movable counter-abutment is configured as one of the tumblers of the lock cylinder.
4. A locking system in accordance with any one of claims 1 to 3, 10 wherein the movable counter-abutment is configured as the tumbler arranged closest to a key introduction opening of the keyway.
5. A locking system in accordance with any one of claims 1 to 4, wherein the abutment section is at least substantially aligned radially to the 15 key axis.
6. A locking system in accordance with any one of claims 1 to 5, wherein the shaft profile and the abutment section are aligned radially in the same direction or in mutually perpendicular directions with respect to the 20 key axis.
7. A locking system in accordance with any one of claims 1 to 6, wherein the key has an introduction region which can be introduced into the keyway of the lock cylinder and an outer region adjacent thereto; 25 and wherein the abutment section is formed completely within the introduction region.
8. A locking system in accordance with any one of claims 1 to 7, wherein the abutment section and the movable counter-abutment are 30 arranged such that the key bow is spaced apart from the lock cylinder when the key is introduced into the keyway up to the correct axial introduction depth.
9. A locking system in accordance with any one of claims 1 to 8, 5 wherein the shaft profile is formed as at least one of a plurality of notches and a plurality of dimples.
10. A locking system in accordance with any one of claims 1 to 9, wherein the abutment profile is formed as a step or as a plurality of steps.
11. A locking system in accordance with any one of claims 1 to 10, wherein said at least one abutment surface of the abutment section is provided at at least one of the projection and the undercut of the abutment profile.
12. A locking system in accordance with any one of claims 1 to 11, wherein the projection has at least one end side which extends perpendicular to the key axis and which forms said at least one abutment surface of the abutment section.
13. A locking system in accordance with any one of claims 1 to 12, wherein the undercut has at least one end side which is aligned perpendicular to the key axis and which forms said at least one abutment surface of the abutment section.
14. A locking system in accordance with any one of claims 1 to 13, wherein the abutment profile has at least two projections, or at least two undercuts, or both at least two projections and at least two undercuts.
15. A locking system in accordance with any one of claims 1 to 14, wherein the movable counter-abutment of the lock cylinder has a counter- profile adapted to cooperate with the abutment profile of the key. 5
16. A locking system in accordance with claim 15, wherein the counter-profile comprises one or more annular grooves.
17. A locking system in accordance with claim 15 or claim 16, wherein the counter-profile is formed completely or only regionally 10 complementary to the abutment profile.
18. A locking system in accordance with any one of claims 15 to 17, wherein the abutment profile is configured only regionally complementary to the counter-profile such that when the abutment section abuts the movable 15 counter-abutment, only an end side of the projection, but not a base of the undercut set back with respect to the end side of the projection, contacts the movable counter-abutment as said at least one abutment surface and hereby forms said only active abutment for limiting the introduction of the key to the correct axial introduction depth.
19. A locking system in accordance with any one of claims 15 to 18, wherein the abutment profile and the counter-profile are configured such that they interlock completely or only regionally when the abutment section abuts the movable counter-abutment.
20. A locking system in accordance with any one of claims 15 to 19, wherein the shaft profile is configured such that, when the key is introduced into the keyway , the movable counter-abutment is aligned for an interlocking of the counter-profile and of the abutment profile.
21. A locking system in accordance with claim 1, substantially as herein described with reference to any embodiment disclosed.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014116376.1 | 2014-11-10 | ||
DE102014116376.1A DE102014116376A1 (en) | 2014-11-10 | 2014-11-10 | Locking system, keys and key blank |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ713965A NZ713965A (en) | 2020-07-31 |
NZ713965B true NZ713965B (en) | 2020-11-03 |
Family
ID=
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