TECHNICAL FIELD
[0001] The invention relates to a lock cylinder arrangement intended and arranged for being
fixed to a lock casing and for control of a lock mechanism arranged in the lock casing.
The invention also relates to a lock arrangement comprising such a lock cylinder arrangement.
BACKGROUND
[0002] Locks for doors, windows, gates and the like are often designed as mortise locks.
Such mortise locks comprise a lock case which forms a housing for a lock mechanism
and which, when mounted to the door or the like is recessed or mortised into a cavity
arranged in the door blade. The lock mechanism comprises movable parts such as cylinder
followers and link arrangements which are mechanically connected to one or several
bolts e.g. a latch bolt and/or a dead bolt, which bolts may be arranged inside or
outside of the lock case. In order to manoeuver the bolts, a lock cylinder may be
fixed to the lock case and connected to the lock mechanism. The lock cylinder comprises
a cylinder housing and a cylinder core, sometimes called cylinder plug, which is rotatably
accommodated in an axial bore of the cylinder housing. The cylinder housing may also
be referred to as a stator and the core may be referred to as a rotor. When the lock
cylinder is mounted to the lock case, the core is connected to the lock mechanism
such that the bolt or bolts may be manoeuvred by rotation of the core. The core may
e.g. be connected to a cylinder follower arranged in the lock case by means of a tailpiece
which is fixed to that axial end of cylinder core which lies proximal to the lock
case, when mounted. In some locks, movement of the bolts is achieved by manoeuvring
of a special manoeuvring device, such as a handle, a knob or an electrical arrangement.
In such cases the cylinder core is connected to blocking means comprised in the lock
mechanism. The blocking means is arranged to selectively allow and prevent manoeuvring
of the bolt and may be controlled by means of rotating the cylinder core.
[0003] In order to control access through the door or the like, the lock cylinder may be
arranged such that an authorisation is required for admitting manoeuvring of the bolts.
Such an authorization may be accomplished in many different ways, e.g. mechanically,
electrically or by a combination of electrical and mechanical means.
[0004] In a traditional key operated lock, authorisation is accomplished mechanically. The
lock cylinder is normally then provided with a set of pin tumblers which are displaceably
received in pin tumbler chambers arranged in the cylinder housing and in the core.
The cylinder core exhibits an axially arranged key channel into which a mechanical
key with a code surface may be inserted. Upon insertion of the key, the code surface
acts as a cam and displaces or lifts the pin tumblers. If a correct or authorized
key is inserted the pin tumblers are displaced to positions such that no pin tumbler
extends between the pin tumbler chambers arranged in the cylinder housing and the
cylinder core. Thereby the core is allowed to be rotated in order to manoeuver the
lock mechanism. If no key or an incorrect, unauthorized key is inserted into the key
channel, at least one pin tumbler will be simultaneously received in a respective
pin tumbler channel in both the housing and the core. Thereby rotation of the core
is prevented. Other examples of mechanical lock cylinders are the disc cylinders.
[0005] In electrical and electro-mechanical locks the lock cylinder may be provided with
electronic authorization control means, such as a key pad for entering a code or an
RFID reader for detecting a code transmitted from an RFID transmitter worn by the
user. Also such lock cylinders may be arranged to prevent rotation of the core relative
to the housing if no authorized code has been presented. The manoeuvring of the lock
mechanism by means of rotating the core, may however also be selectively allowed and
prevented by other means. For example, the core may be connected to the tail piece
by means of a coupling device which selectively connects and disconnects the core
with the tail piece in response to whether or not an authorized code has been presented.
If no authorized code has been presented the core is disconnected from the tail piece
such that rotation of the core is not transmitted to the tail piece or the loch mechanism,
whereby the lock mechanism may not be manoeuvred or controlled by rotating the core.
[0006] The cylinder core may comprise various different means for bringing about rotation.
Instead of being provided with a key channel for insertion of a key which is used
for rotating the core, it may comprise or be connected to a knob, a thumb turn, a
handle or any electrical means such as a motor or a solenoid for rotating the core.
[0007] The present invention is applicable to all the above mentioned exemplifying variations
and uses of a lock cylinder arrangement.
PRIOR ART
[0008] Fig. 0 illustrates a previously known door lock of the above described type which
comprises a lock cylinder arrangement. The known lock comprises a lock case 100 that
is recessed in a door leaf which has a high security outside 101 and an inside 102,
which forms a lower security or convenient side of the door. A first lock cylinder
103a is fixed to the inside of the lock case and a second cylinder 103b is fixed to
the outside of the lock case. The two lock cylinders each have a cylinder housing
and a core 104 which is rotatable in the cylinder housing. The core has a key channel.
When a correct key is inserted into the key channel, the core can be rotated relative
to the cylinder housing by turning the key. The core's rotational movement is transferred
to a cylinder follower in the lock case 100 by means of a tail piece 105 which is
fixed to the end portion of the core 104, which end faces the lock case 100. Rotation
of the cylinder follower in turn affects a locking mechanism in the lock case for
actuating a bolt 106 and a latch 107.
[0009] At the traditional lock cylinders, such as the above illustrated, the two cylinders
are fixed to the lock housing using screws 108 which are inserted from the inside
through the inner cylinder 103a and the lock housing 100 and which, from the inside,
are screwed into threaded holes arranged in the outer cylinder 103b.
EP 0 072 803 B1 describes another example of such an arrangement, according to the preamble of claim
1. These arrangements have the advantage of that the mounting screws are not accessible
from the outside of the door, which outside should exhibit a high degree of security.
The arrangements, however, have the serious disadvantage in that a specific cylinder
cannot be used both on the outside and on the inside. They are thus not, what in the
industry is known as reversible. Instead, the cylinders must be designed either as
outside cylinders with threaded non through holes or as internal cylinders with through
holes which are provided with internal stops for axial support of the mounting screw
heads.
[0010] There are also reversible cylinders which are designed as the above described interior
cylinder (103a). The exterior and the interior cylinders are then fixed to the lock
housing by means of the respective sets of mounting screws being inserted through
each cylinder from the end facing away from the lock case and screwed into threaded
holes arranged in the lock case. By this means the cylinder is made reversible whereby
one and the same cylinder can be used on both the outside and the inside of the door.
The arrangement has however the disadvantage that the mounting screws are accessible
from the outside of the door, which seriously reduces the security.
[0011] US 6,860,129 discloses another lock arrangement comprising an outer and an inner lock cylinder
and a lock core. The outer lock cylinder is secured to the lock core by means of an
outer sleeve, an outer collar provided with locking notches and a locking pin. A head
of the locking pin is received in the locking notches and the pin extends through
the lock core such that an end of the pin is in contact with an inner collar of the
lock arrangement.
[0012] At lock cylinders of the type illustrated in fig. 0, it is known to provide so-called
drill protection. Such drill protection normally consists of plates and / or rods
which are formed in a high strength material and which are introduced in various particularly
sensitive parts of the lock cylinder to prevent these parts, through drilling in the
lock cylinder, from being removed or destroyed in order to force the lock.
[0013] US 6,301,942 discloses a lock cylinder provided with drilling protection organs.
[0014] A problem with prior art drilling protection is that it is complicated and space-consuming
to obtain a good fixation of the drilling protection parts in the lock cylinder.
[0015] At the lock cylinders illustrated in fig 0, a decorative cylinder ring 109a, 109b
is arranged around the cylinder 103a, 103b on the outside of the door. The cylinder
ring 109 may be internally threaded and secured to the cylinder by being threaded
onto an external thread provided on the envelope surface of the lock cylinder. Alternatively,
and as indicated in fig. 1, the cylinder ring 109 may be fixed to the cylinder by
being slipped onto the outside and fixed in position with a radially disposed small
fixing screw which is screwed into contact with envelope surface of the lock cylinder.
The function of the cylinder ring 109 is to cover the hole in the door through which
the cylinder protrudes and thus to provide a neat installation.
[0016] To further enhance the appearance of the installed lock, a decorative cover or cap
110a, 110b can be applied around the cylinder, radially inside cylinder ring, so that
the entire lock cylinder, apart from the key channel mouth is concealed under cover.
The cap 110a, 110b can be fixed by means of the cylinder ring fixing screw extending
through a slot in the cap 110 or by a simple resilient snap element which is snapped
into a designated recess in the envelope surface of the lock cylinder. By choosing
different materials and designs for the cylinder ring 109a, 109b and the cap 110a,
110b, is it possible to give the entire lock different appearances to match various
other accessories and fittings on the door or interior decoration in general.
[0017] US 7,389,660 discloses another known arrangement for fixation of a cylinder ring to a lock cylinder
according to the preamble of claim 1.
[0018] In recent years it has proved to be a problem that the decorative details of the
lock are attractive to thieves, and that they are stolen, for example from lock installations
in public buildings.
[0019] At prior art lock cylinder arrangements it is also known to arrange so called screw
protection means. Such means are arranged for preventing unauthorized persons from
removing the lock cylinder from the lock casing and/or the door. The screw protection
means may comprise a plug or the like which covers at least one mounting screw by
which the lock cylinder is fixed to the lock casing. The plug is arranged at that
end of the screw which is used for inserting a screw driver or any other tool for
screwing the mounting screw when mounting and dismounting the lock cylinder. The lock
cylinder may further be provided with plug locking means which prevent removal of
the plug when the cylinder core is in a locked state and which allow removal of the
plug when the core has been rotated to an unlocked state. By this means, access to
the mounting screw is allowed only for person that are in the possession of a correct
key or any other authorization means that allow operation of the lock arrangement.
[0020] EP 0 072 803 B1 discloses a lock according to the preamble of claim 1, with a previously known screw
protection means comprising a plug of the above described type, which plug is provided
with a waist portion. A radially displaceable pin is arranged in a radial bore of
the lock housing. A corresponding radial bore is arranged in the lock core. An outward
end of the pin may be brought in and out of engagement with the waist portion of the
plug to thereby respectively prevent and allow removal of the plug. The pin is displaceable
out of engagement with the waist portion only when the cylinder core has been rotated,
by means of an authorized key, such that the two radial bores are in register with
each other.
[0021] This known screw protection arrangement thus provides for that only persons being
in possession of an authorized key are able to remove the plug and to dismount the
mounting screws. The known arrangement however exhibits some disadvantages in that
it is comparatively complicated to manufacture a cylinder housing and a core with
said radial bores. The pin and bores further requires comparatively large space within
the cylinder housing and the core and the arrangement requires a comparatively large
number of movable parts.
SUMMARY
[0022] It is therefore an object of the present invention to provide an enhanced lock cylinder
arrangement.
[0023] Another object to provide such a lock cylinder arrangement with an enhanced fixation
of a decorative cylinder ring and cylinder cap.
[0024] It is a further object to provide such a lock cylinder arrangement which prevents
unauthorized removal of the cylinder ring and the cap.
[0025] A still further object is to provide such a lock cylinder arrangement at which the
cylinder ring and cylinder cap being arranged at an outer lock cylinder can be removed
only after gaining access to the inside of the door.
[0026] Yet another object is to provide such a lock cylinder arrangement at which requires
dismounting of the lock cylinder from the lock casing for allowing removal of the
cylinder ring and the cap.
[0027] It is another object to provide such a lock cylinder arrangement at which the cylinder
ring and cap may be readily mounted to the lock cylinder.
[0028] According to the invention the lock cylinder arrangement is intended for fixation
to a lock casing and for control of a lock mechanism arranged in the lock casing.
The lock cylinder arrangement comprises a cylinder housing having a first axial end
arranged to be positioned distal to the lock casing and a second axial end being opposite
to the first axial end and arranged to be positioned proximal to the lock casing.
A cylinder core is rotatably accommodated in the cylinder housing. A cylinder ring
is mountable coaxially around the cylinder housing. A cylinder cap is mountable coaxially
around the cylinder housing, radially inside of the cylinder ring. The cylinder ring
comprises a radially inwardly projecting stop which, in cooperation with a locking
ring received in a locking grove arranged in the envelope surface of the cylinder
housing, limits axial displacement of the cylinder ring towards the first axial end
of the cylinder housing. The cylinder housing and the cylinder cap are provided with
interacting locking means which are arranged to limit axial displacement of the cylinder
cap toward the first axial end of the cylinder housing, when the cylinder ring surrounds
said locking means.
[0029] Hereby the cylinder ring and the cap may be easily mounted to the lock cylinder before
the lock cylinder has been fixed to a lock casing. Theft of the cylinder ring and
the cap is however prevented in an efficient manner, since removal of the cylinder
ring and cap requires that the lock cylinder is detached from the lock casing. Such
removal of the lock cylinder may only be accomplished after having gained access to
the inside of the door or the like.
[0030] The locking means may comprise a radially inwardly projecting snap hook and a radially
outwardly projecting locking tap arranged on the cylinder cap and a snap recess arranged
in the envelope surface of the cylinder housing, which snap recess is arranged to
receive the snap hook.
[0031] The snap hook and the locking tab may be arranged on a resilient tongue of the cylinder
cap.
[0032] An axial groove may be arranged in the envelope surface of the cylinder housing,
which groove extends from the first axial end surface of the cylinder housing and
opens to the snap recess.
[0033] The cylinder cap may be formed of a sheet metal or polymer material.
[0034] The cylinder ring may comprise a front axial portion arranged to lie proximal to
the first axial end of the cylinder housing, an intermediate portion and a rear axial
portion arranged to lie distal to the first axial end of the cylinder housing. The
front axial portion then exhibits a first inner diameter; the intermediate axial portion
exhibits a second inner diameter which is larger than the first diameter and the rear
axial portion exhibits a third inner diameter, which is smaller than the first and
the second diameters.
[0035] The locking ring may exhibit an outer diameter which is smaller than the first and
the second inner diameters and larger than the third inner diameter of the cylinder
ring, when the locking ring is received in the locking groove. The intermediate portion
may be arranged to abut the lock tab for pressing the snap hook into the snap recess
when the cylinder is positioned around the cylinder cap and cylinder housing.
[0036] The intermediate portion may be conical and exhibit the second inner diameter at
an axial end of said intermediate portion being distal to the front axial portion.
[0037] Alternatively, the intermediate portion may exhibit a circumferential recess which
defines the second inner diameter.
[0038] The locking ring may be resilient for allowing releasable snap fixation in the locking
groove.
[0039] Further objects and advantages of the invention will be apparent from the following
detailed description of embodiments and from the appended claims.
[0040] Generally, all terms used in the claims are to be interpreted according to their
ordinary meaning in the technical field, unless explicitly defined otherwise herein.
All references to "a/an/the element, apparatus, component, means, step, etc." are
to be interpreted openly as referring to at least one instance of the element, apparatus,
component, means, step, etc., unless explicitly stated otherwise. The steps of any
method disclosed herein do not have to be performed in the exact order disclosed,
unless explicitly stated.
BRIEF DESCRIPTION OF THE DRAWINGS
[0041] The invention is now described, by way of example, with reference to the accompanying
drawings, in which:
Fig. 0 is an exploded view in perspective illustrating a previously known lock arrangement
comprising two lock cylinders.
Fig 1a is an exploded view in perspective illustrating a lock cylinder arrangement
comprising two reversible lock cylinders.
Fig 1b is a partly exploded view in perspective illustrating an outer lock cylinder
of the arrangement shown in fig. 1a.
Fig. 2a is an exploded view in perspective illustrating a lock cylinder arrangement
comprising drill protection members.
Fig. 2b is a cross section of the lock cylinder arrangement shown in fig. 2a.
Fig. 2c is a en exploded view similar to the one in fig. 2a, illustrating the same
lock cylinder arrangement with some of the drilling protection members inserted into
the cylinder housing.
Figs. 3a-c are perspective views of a lock cylinder arrangement comprising a cylinder
ring and a decorative cylinder cap and shows the arrangement during different steps
of assembling.
Fig. 3d is a longitudinal section in enlarged scale of a portion of the lock cylinder
arrangement shown in figs 3a-c, when assembled.
Figs. 4a and 4b are perspective views illustrating a lock cylinder arrangement comprising
means for screw protection.
Fig. 4c is an exploded perspective view of a cover member forming part of the lock
cylinder arrangement shown in figs 4a and 4b.
Figs. 4d-4f are front elevation views of the lock cylinder arrangement shown in figs.
4a-4b and shows components thereof in different operational positions.
DETAILED DESCRIPTION OF EXAMPLIFING EMBODIMENTS
[0042] The invention will now be described more fully hereinafter with reference to the
accompanying drawings, in which certain embodiments of the invention are shown.
[0043] Figs. 1a and 1b illustrates a cylinder lock arrangement comprising two identical
reversible lock cylinders. Fig. 1a, shows an inner lock cylinder 1 and an outer lock
cylinder 2. The figure does not show the intermediate lock case arranged between the
cylinders, to which lock case the cylinders are fixed. The two cylinders 1, 2 are
identical. They exhibit a respective first axial end 1a, 2a which is intended to be
located distal to the lock case and a respective second end 1b, 2b arranged opposite
to the first end and intended to be arranged proximal to the lock case. Each lock
cylinder 1, 2 comprises a cylinder housing 1c, 2c and a core 1d, 2d, which is rotatably
accommodated in the cylinder housing 1c, 2c. For fixing of the two cylinders 1, 2,
to each other and to the lock case a set of fixation devices 3, 4 are provided. In
the example illustrated, four fixation devices are used. Each fixation device comprises
a first fixation member 3 being stationary and a second fixation member 4 being rotary.
The two fixation members of each fixation device have cooperating engagement parts
for fixing engagement. In the example shown, the first fixation member 3 consists
of a nut bushing with an internal thread and the second fixation member 4 consists
of a screw with external thread. It is also possible that the first fixation member
has an external thread and the second fixation member an internal thread. It is also
possible that the engagement between the first fixation member and the second fixation
member is achieved by means of a bayonet-engagement or the like.
[0044] The cylinders 1, 2, exhibit a number of axial through bores 5, 6 extending through
the respective cylinder housing 1c, 2c, which number corresponds to the number fixation
devices 3, 4. As seen in Figure 1b, each bore comprises a main portion 5 and a mouth
portion 6. The main portion 5 extends from the second cylinder end 1b, 2b to the mouth
portion 6 which is arranged adjacent the first cylinder end 1a, 2a. In the illustrated
example, the mouth portion 6 is axially divided into an inner mouth portion 6a, being
arranged proximal to the main portion 5 and an outer mouth portion 6b being arranged
adjacent the first end 2a och the cylinder housing 2. The outer mouth portion 6b extends
a small distance, approx. 5 mm, from the first cylinder end 1a, 2a to the inner mouth
portion 6a. The inner mouth portion extends approx. 20 mm from the outer mouth portion
6b to the main portion 5. The main portion 5 has a circular cross section with a first
diameter D1.
[0045] The outer mouth portion 6b has a polygonal cross section with a larger cross sectional
area than the inner mouth portion 6a and than the main portion 5. In this way, a first
axial stop 7 having a generally annular abutment surface is arranged at an inner bottom
of the outer mouth potion 6b. The first axial stop 7 is substantially parallel to
both cylinder end faces. The first axial stop 7 has a circular inner edge and a polygonal
outer edge. The outer mouth portion 6b is thus defined by the first axial stop 7 and
by a wall which is arranged perpendicular to the first axial stop 7 and which comprises
a number of planar wall segments 8.
[0046] The inner mouth portion 6a has a circular cross section with a second diameter D2
and a cross sectional area that is smaller than the cross sectional area of the outer
mouth portion 6b but larger than the main portion 5. In this way, a second axial stop
9a having a generally annular abutment surface is arranged at an inner bottom of the
inner mouth potion 6a. The second axial stop 9a is substantially parallel to both
cylinder end faces. The second axial stop 9a has a circular inner edge and a circular
outer edge. The inner mouth portion 6a is thus defined by the second axial stop 9a
and by a cylindrical wall 9b which is arranged perpendicular to the second axial stop
9a and which extends to the first axial stop 7.
[0047] Each first fixation member 3 comprises an internally threaded cylindrical sleeve
portion 3a and a first head portion 3b. The sleeve portion 3a has an outer diameter
which is slightly smaller than the inner mouth portion's 6a inner diameter D2, so
that the sleeve portion 3a can be inserted in the inner mouth portion 6a and therein
threadedly receive an externally threaded end 4a (see Figure 1a) of the second fixation
member 4. First head portion 3b has a cross sectional area which is larger than the
sleeve portion's 3a cross-sectional area and the cross sectional area of the inner
mouth portion 6a. The first head portion 3b can thus not be inserted into the inner
mouth portion 6a. The cross section of the first head portion 3b is further polygonal
with a shape corresponding to the outer mouth portion's 6b polygonal cross section,
so that the first fixation member 3 is prevented from rotating relative to the cylinder
1, 2, by means of form locking between the first head portion 3b and the wall segments
8 of the outer mouth portion 6b.
[0048] The rotatable second fixation members 4 each have a cylindrical second head portion
4b. The end surface of the second head portion 4b is provided with a groove (not shown)
for engagement by a screwdriver or the like. The second head portion 4b has a diameter
that is larger than the diameter D1 of the bore's main portion 5, but smaller than
the diameter D2 of the inner mouth portion 6a. When the second fixation member 4 is
inserted into the bore 5, 6 from the first cylinder end 1a, 2a, the second head portion
4b can therefore be inserted through outer mouth portion 6b and into the inner mouth
portion 6a, where it is allowed to rotate relative to the cylinders 1, 2. By contrast,
the second axial stop 9 of the inner mouth portion 6a prevents the second head portion
4b from passing into the main portion 5 of the bore.
[0049] During mounting to a lock case, a first cylinder 1 is placed at the inner convenient
side of the lock case and a second cylinder 2 at the high security outside of the
lock case. As shown in Figure 1a, the second fixation members 4 are inserted into
the first, inner cylinder 1 from the first side 1b. The second fixation members 4
are further pushed such that their threaded portions 4a are passed through corresponding
mounting holes (not shown) arranged in the lock casing (not shown) and into the main
portion 5 and the inner mouth portion 6a of the second cylinder 2. The first fixation
members 3 are introduced into the second, outer cylinder 2 from the first side 2a
so that the first head portions 3b are anti-rotationally engaged with the wall segments
8 of the outer mouth portions 6b. The second fixation members 4 are thereafter screwed
into threaded engagement with the first fixation members 3.
[0050] It will be appreciated that the first axial stops 7 of the second cylinder 2 prevents
the first fixation members 3 from being displaced towards the first cylinder 1. Correspondingly,
the second axial stops 9 of the first cylinder 1 will prevent the second fixation
members 4a from being displaced towards the second cylinder 2. When the second fixation
members 4 are tightened into engagement with the first fixation members 3, an axial
contractive force is thus achieved, which forces the first 1 and second 2 cylinder
to secure abutment against the intermediate lock case (not shown). At the same time,
the form locking between the wall segments 8 and the first fixation member's 3 first
head portions 3b prevents the first fixation members 3 from being unscrewed from the
outside of the door. The two identical and therefore reversible cylinders 1, 2 may
thus be dismounted only from the inside of the door.
[0051] The first head portion 3b of the first fixation members 3 are further provided with
an outwardly convex end surface, which renders it difficult to remove the first fixation
members 3 by drilling from the outside of the door.
[0052] The fixation devices and the bores may be varied in a number of different ways within
the scope of the appended claims. It is e.g. possible to arrange the mouth portion
as a single mouth portion having a constant cross section over its entire axial length.
In such a case, the arrangement comprises a single axial stop which is arranged at
the bottom of the mouth portion. The head portions of both the first and the second
fixation members then has a cross sectional area which is larger than the bore's main
portion but smaller or equal to the cross sectional area of the mouth portion. Thus,
the single axial stop then prevents the head portions of both the first and the second
fixation members from being axially displaced into the bore's main portion.
[0053] The first fixation members may be formed with a constant cross section over its entire
axial length. In such case the entire first fixation member constitutes a first head
portion.
[0054] Irrespective of whether or not the first head portion constitutes the entire first
fixation member or an axial portion thereof, relative rotation between the first fixation
member and the cylinder may be achieved by other means than by corresponding polygonal
cross sections. The mouth portions and the first head portions may e.g. exhibit corresponding
non-circular cross sections other than polygonal, such as oval, elliptic or other
rounded non-circular shapes.
[0055] The first head portion and the mouth portion may even be provided with corresponding
circular cross sections. In such a case, relative rotation between the first fixation
member and the cylinder may be provided by means of friction locking between the first
head portion and the mouth portion. Such a friction locking may be achieved by means
of press fitting, force fitting, tight fitting and the like of the first head portion
in the mouth portion. The friction between the first head portion and the mouth portion
may be increased by means of knurling or other friction increasing means being provided
to the first head portion and/or the walls of the mouth portion. Relative rotation
between the first head portion and the cylinder may also be achieved by means of interacting
form locking and/or friction locking means arranged at an axial end surface of the
first head portion and/or on the axial stop arranged at the bottom of the mouth portion.
[0056] Additionally, the second fixation members may comprise more than one component. For
example, at least one second fixation member may comprise a rod which at least at
its end portions exhibits an external thread and a sleeve or the like which is threaded
onto one end of the rod. The sleeve then may form the second head portion. A recess,
a protrusion or the like for engaging a tool may be provided, e.g. at an end surface
of the sleeve, such that the sleeve and the rod may be jointly screwed by means of
a screw driver or the like for bringing the other end of the rod into engagement with
a first fixation member. In a simple embodiment" the fixation device may thus comprise
an externally threaded rod and two internally threaded sleeves, ring nuts, nuts or
the like.
[0057] In the illustrated embodiments, the lock cylinder arrangement is provided with four
axial bores arranged in each lock cylinder and four fixation devices. It is however
possible to vary the number bores and corresponding fixation devices. At the type
of lock cylinder exhibiting an oval cross section it has been proven suitable to provide
each cylinder with only two bores and the lock arrangement with two corresponding
fixation devices.
[0058] Upon mounting two cylinders at a respective side of a lock case it may, at some applications,
be advantageous to insert some of the first fixation devices from a first side of
the lock case and some of the first fixation devices from a second side of the lock
case. A corresponding number second fixation devices are then inserted from the respective
opposite side of the lock case. At the so mounted lock arrangement, the mouth portions
of each lock cylinder will accommodate both first and second head portions.
[0059] Figs. 2a-c illustrate an exemplifying embodiment of a lock cylinder arrangement provided
with drill protection means. In the Figs 2a-c, an outer cylinder 2 of the type described
above is shown. As seen in fig. 2a, the lock cylinder 2 comprises four different types
of drilling protection means:
A first drill protection means is constituted by the first fixation members 3. As
described above the first fixation members 3 are provided with an outwardly convex
end surface which renders it difficult to position and maintain a drill or a drill
bit for damaging or removing the first fixation member through a drilling operation.
A second drill protection means is constituted by a drill protection plate 14, which
is disposed in an outwardly open recess 2d which is formed in the outer end face 2b
of the lock cylinder 2. A third drill protection means is formed by two pins 13 which
are inserted into channels 15 which extend from the lock cylinder's 2 envelope surface,
in a cross sectional plane near the outer end of the cylinder and parallel to the
pin tumbler chambers 12. A fourth drill protection means is formed of two cylindrical
rods 11 which are inserted into channels 16 running axially along and on both sides
of the lock cylinder's pin tumbler chambers 12.
[0060] The drilling protection plate 14 covers the channels 16 in which the rods 11 are
occupied and thus prevents removal of the rods 11. Drill protection plate 14 is further
configured and arranged so that it is secured to the lock cylinder by two 3' of the
first fixing members 3', 3" described above, which first fixing members 3', 3" constitute
fixing means for fixing the lock cylinder 2 to a lock case. For this purpose, the
recess 2c in which the drilling protection plate 14 is received, is arranged to extend
into the two central outer mouth portions 6'b of the bores in which the fixing members
3, 4 are occupied. When the plate 14 is positioned in the recess 2c, its outwardly
facing surface is arranged in the same plane as the first axial stop 7' defined by
the outer mouth portions 6'b. When the lock cylinder 2 is fixed by the fixing members
3, 4, the first head portions 3'b of the central first fixation members 3' will thus
abut the plate 14 and prevent removal of the plate 14.
[0061] The channels 15 in which the drill protection pins 13 are received extend partially
through the inner mouth portion 6"a of the outer two bores for the fixation members
3". Each pin 13 further comprises a narrowed waist portion 13a which, in the inserted
state is arranged in level with inner mouth portion 6"a. When the first fixation members
3" are inserted in the two outer mouth portions 6", the sleeve portions 3"a of the
stationary members 3", extend past the waist portions 13a and thereby secure, by form
locking, the pins 13 in their respective channels 15.
[0062] Thus the existing first fixation members 3', 3" on the one hand, per se form drill
protection members and, on the other hand, are used for fixing and securing of all
drill protection members 11, 13, 4.
[0063] Figs. 3a-d illustrate an exemplifying embodiment of a lock cylinder arrangement provided
with a cylinder ring and a decorative cylinder cap. Figs. 3a-d show a lock cylinder
2 which is intended to be mounted to the high security outside of a door. The cylinder
arrangement further comprises a cylinder ring 21, a cap 22 and a locking ring 23 of
a resilient material, such as steel. The cap 22 is provided for decorative purposes
and may be formed of a number of different materials and exhibiting different colours
and surface roughness depending on the field of application. The locking ring 23,
cylinder ring 21 and the cap 22 are mounted on the lock cylinder 2 before the lock
cylinder 2 is fixed to the lock case as described above. First, the locking ring 23
is applied to the lock cylinder 2, so that it snaps into a designated slot 24 which
is arranged in the envelope surface of the lock cylinder 2 and extends in the circumferential
direction.
[0064] A central bore of the cylinder ring 21 has a front cylindrical portion 21a, an intermediate
rearwardly radially flared portion 21b and a rear inwardly projecting stop 21c. The
front portion 21a has a constant inner diameter d1 which is slightly larger than the
outer diameter of the cap 22 and than the outer diameter of the locking ring 23, when
mounted in the slot 24. The diameter of the intermediate portion 21b increases gradually
backward from diameter d1 to a larger inner diameter d2, so that this portion is conical.
The inwardly projecting stop 21c is cylindrical with a diameter d3, that is smaller
than d1, and than the outer diameter of locking ring 23 when the locking ring is mounted.
The cylinder ring 21 can thus be threaded onto the lock cylinder in the forward direction
until the inwardly projecting stop 21c comes in contact with the locking ring 23.
[0065] The cap 22 is slipped onto the lock cylinder 2 in the direction from the front. The
cap 22 has on its circumferential surface, at the rear end, a resilient tongue 22a
with a radially inwardly projecting snap hook 22b and a radially outwardly projecting
locking tab 22c. The lock cylinder 2 has on its circumferential surface an axial groove
201 which, at its rear end opens into a snap recess 202, whose depth is larger than
that of the groove 201. At the illustrated embodiment the snap hook 22b is spoon shaped
such as to increase the rigidity of the snap hook 22b to thereby achieve a secure
snap engagement with the snap recess 202. The snap hook may however have any suitable
shape as long as it may be brought into snap engagement with a corresponding snap
recess.
[0066] When the cap 22 is slipped onto the lock cylinder 2, the snap hook 22b runs in the
slot 201 until the cap is fully slipped onto the cylinder, whereby snap hook 22b snaps
into the snap recess 202. Thereafter, the cylinder ring 21 is slipped onto the cylinder
2 from the rear end, in the forward direction. The front cylindrical portion 21 then
passes over the locking tab 22c. The cylinder ring 21 may now be positioned at any
desired axial position along the cylinder 2, as long as the locking tab 22c is arranged
along and radially inside the cylindrical portion 21a or the intermediate conical
portion 21b of the cylinder ring 21.
[0067] When the cylinder is thereafter mounted to the lock case, it is not possible to remove
the cylinder ring 21 thanks to the locking ring's 23 blocking interaction with the
inwardly projecting stop 21c of the cylinder ring 21. Nor is it possible to pull off
the cap 22 as the cylinder ring's 21 cylindrical portion 21a, in contact with locking
tab 22c presses the tab 22b to engage the snap recess 202.
[0068] In order to remove the cylinder ring and/or the cap , it is necessary to first remove
the lock cylinder from the lock case, which is possible only for those who have access
to the inside of the door, as described above.
[0069] The intermediate portion of the cylinder ring may, instead of being conical, comprise
a circumferential recess which defines the second inner diameter. Such a recess may
be formed such that the transition between the first inner diameter to the second
inner diameter forms a step. The recess may also be curved such that the transition
between the first inner diameter and the second inner diameter is continuous.
[0070] Figs. 1a and 4a-4f illustrates a lock cylinder arrangement comprising a screw protection
means for preventing access to the mounting screws by which the lock cylinder is fixed
to a lock case. The screw protection means is applied to a lock cylinder 1, which
is intended to be mounted to the inner convenient side of a door. The lock cylinder
1 comprises a cylinder housing 1c which has a first axial end 1a which is arranged
to be positioned distal to the lock case (not shown) and a second axial end 1b which
is arranged opposite to the first axial end 1a and intended to be positioned proximal
to the lock case. A cylinder core 1d is rotatably accommodated in the cylinder housing
1c.
[0071] The lock cylinder 1 exhibits four fixation bores 5, 6 which extends axially through
the cylinder housing 1c. Each fixation bore comprise a main portion 5 and a widened
mouth portion 6 arranged at the first axial end 1a. Each mouth portion 6 is axially
divided into an inner mouth portion 6a and an outer mouth portion 6b. The inner mouth
portion 6a defines an axial stop. A fixation member 4 is inserted in each fixation
bore 5, 6. Each fixation member 4 comprises a head portion 4b which is able to be
seated in the mouth portion 6 and to be axially supported by the axial stop. Each
fixation member 4 also comprise a threaded end portion 4a by means of which the lock
cylinder 1 may be fixed to a lock casing and/or a corresponding outer lock cylinder
as described above.
[0072] The first axial end 1a of the cylinder housing 1c is provided with a recess 1e. The
recess 1e is identical with the recess 2e described above with references to fig.
2a and when the cylinder 1 is used as an outer cylinder, the recess 1e may accommodate
a drill protection plate similar to the plate 14 described above. However, when the
cylinder 1 is used as an inner cylinder as illustrated in figs 1 and 4a-4f the recess
1e is arranged to receive a cover device 30. The cover device 30 comprises a base
member 31 which may be inserted into the recess 1e. A locking member 32 is attached
to the base member 31. The locking member 32 is formed as a disc which is rotatably
attached to the base member 31 and received in the recess 1e. The base member exhibits
31 an axially extending dowel 37 which is received in a central through opening 38
in the locking member and which defines a rotational axis for the locking member.
A spring biased snap pin 39a is arranged at the base member 31. The locking member
32 exhibits two corresponding snap holes 39b, 39c. The snap pin 39a is arranged to
snap engage the snap holes 39b, 39c at a respective rotational position of the locking
member, corresponding to a release position and a locking position respectively of
the locking member 32.
[0073] The cover device 30 further comprises two leg members 35 which are attached to the
base member 31. Each leg member 35 comprises two axially protruding plugs 36. Each
plug 36 comprises a first axial plug portion which is insertable into an inner mouth
portion 6a of the cylinder housing 1c and a second plug portion 36b which is insertable
in the outer mouth portion 6b.
[0074] When the cover device 30 is inserted into recess 1e, the plugs 36 are received in
a respective mouth portion 6 such as to cover a head portion 4b of a fixation member
4 received in each mouth portion 6.
[0075] The cylinder housing 1c is provided with a stop 33 which is formed as two under cut
portions of the recess 1e. The locking member 32 exhibits a peripheral edge 34 which
exhibits two indentations 34a. The indentations 34a are arranged at an angular distance
which corresponds to the distance between the two under cut portions 33 of the recess.
The locking member 32 may thus be rotated to a release position at which the two indentations
34a are aligned with the under cut portions 33, such that the locking member 32 and
the base member 31 may be axially inserted into and removed from the recess 1e. When
the locking member 32 and the base member 31 has been received in the recess 1e, the
locking member may be rotated to a locking position, wherein the first indentations
34a are brought out of alignment with the under cut portions 33. At the locking position,
a portion of the peripheral edge 34 not forming the first indentations engages the
under cut portions 33 such that removal of the locking member 32 and the base member
is prevented.
[0076] The cylinder core 1d is provided with a radial cut out 41 which is arranged in the
generally cylindrical outer envelope surface 40 of the core 1d. The peripheral edge
34 of the locking member further exhibits a first 34b and a second 34c concave cam
surface. The curvature of both concave cam surfaces 34b, 34c correspond to the radius
of the cylindrical outer envelope surface 40 of the core. Thus, when the locking member
32 has been rotated such that either of the concave cam surfaces 34b , 34c is enclosing
a portion of the cylindrical envelope surface 40 of the core 1d, it is possible to
rotate the core 1d, e.g. by means of a correct key being inserted into a key channel
of the core.
[0077] The first concave cam surface 34b is arranged such that it encloses the envelope
surface of the core 1d when the locking member 32 has been rotated to its locking
position as shown in fig. 4d. In fig 4d, the core 1d is in a first rotational position
at which it is required to insert an authorized key into the key channel in order
to be able to rotate the core 1d. The fist concave cam surface 34b encloses a portion
of the outer envelop envelope surface 40 of the core, such that it is not possible
to rotate the locking member 32. In this locking position the indentations 34a are
brought out of alignment with the under cut portions 33, such that it is not possible
to remove the locking member 32 or the base member 31 from the recess 1e. In this
position the head portions 4b of the fixation members 4 are thus covered by a respective
plug 36 inserted in the mouth portion 6 of the cylinder housing. Thereby the head
portions 4b are not accessible for dismounting of the lock cylinder 1.
[0078] In order to allow access to the head portions 4b, it is required to first insert
an authorized key into the key channel of the core 1d and to rotate the core 1d, to
a predetermined position in which the radial cut out 41 of the core 1d is arranged
in register with the locking member 32. This predetermined rotational position of
the core is shown in figs. 4e and 4f. At this predetermined rotational position of
the core 1d it is possible to rotate the locking member 32 toward its release position,
as shown in fig. 4e. During such rotation of the locking member 32, the entire edge
34 of the locking member 32, may pass the cylinder core 1d, since the radial cut out
41 allows also radially outmost portions of the edge 34 to pass through the cut out
portion 41. In fig 4e, the locking member 32 has been rotated counterclockwise about
half the way from the locking position shown in fig 4d, towards the release position
shown in fig. 4f. By completing the rotation of the locking member 32 to the release
position shown in fig. 4f, the two indentations are brought into alignment with a
respective under cut portion 33. It is thereby possible to remove the cover device
30 such that the mouth portions 6 and the fixation member's 4 head portions are made
accessible for removal. At the same time the second concave cam surface 34c has been
rotated such that it is arranged in proximity to the core 1d. The core 1d may thereby
be rotated back to the position shown in fig. 4d to thereby allow removal of the key.
[0079] At an embodiment which is not illustrated in the drawings, the locking member may
be linearly movable between a locking position and a release position. Additionally,
the stop arranged in the cylinder housing may be formed by other means than an under
cut portion of a recess. E.g. the stop may be formed as a stud which extends axially
from the first end of the cylinder housing. The stud may at the free end be provided
with an enlarge head portion. A linearly displaceable locking member may be provided
with a keyhole shaped through opening with a widened portion which may be brought
in register with the enlarged head portion for allowing removal of the locking member
and a narrower portion which in register with the head portion prevents removal of
the locking member. The cover device may comprise any number of plugs or other covering
means, which in register with at least one mouth portion for a fixation member prevents
access to at least one fixation member.
[0080] The invention has mainly been described above with reference to a few embodiments.
However, as is readily appreciated by a person skilled in the art, other embodiments
than the ones disclosed above are equally possible within the scope of the invention,
as defined by the appended patent claims.
1. A lock cylinder arrangement for fixation to a lock casing and for control of a lock
mechanism arranged in the lock casing, said arrangement comprising;
- a cylinder housing (2c) having a first axial end (2a) arranged to be positioned
distal to the lock casing and a second axial end (2b) being opposite to the first
axial end and arranged to be positioned proximal to the lock casing;
- a cylinder core (2d) which is rotatably accommodated in the cylinder housing;
- a cylinder ring (21) which is mountable coaxially around the cylinder housing and
- a cylinder cap (22) which is mountable coaxially around the cylinder housing, radially
inside of the cylinder ring, characterized in that
- the cylinder ring comprises a radially inwardly projecting stop (21c), which, in
cooperation with a locking ring (23) received in a locking grove (24) arranged in
the envelope surface of the cylinder housing, limits axial displacement of the cylinder
ring towards the first axial end of the cylinder housing; and in that
- the cylinder housing and the cylinder cap are provided with interacting locking
means (22a, 22b, 22c, 201, 202) which are arranged to limit axial displacement of
the cylinder cap toward the first axial end of the cylinder housing, when the cylinder
ring surrounds said locking means.
2. A lock cylinder arrangement according to claim 1, wherein the locking means comprises
a radially inwardly projecting snap hook (22b) and a radially outwardly projecting
locking tap (22c) arranged on the cylinder cap (22) and a snap recess (202) arranged
in the envelope surface of the cylinder housing (2c), which snap recess is arranged
to receive the snap hook.
3. A lock cylinder arrangement according to claim 2, wherein the snap hook (22b) and
the locking tab (22c) are arranged on a resilient tongue (22a) of the cylinder cap
(22).
4. A lock cylinder arrangement according to claim 2 or 3, wherein an axial groove (201)
is arranged in the envelope surface of the cylinder housing (2c), which groove extends
from the first axial end (2a) surface of the cylinder housing and opens to the snap
recess (202).
5. A lock cylinder arrangement according to any of claims 1-5, wherein the cylinder cap
(22) is formed of a sheet metal or polymer material.
6. A lock cylinder arrangement according to any of claims 1-5, wherein the cylinder ring
(21) comprises a front axial (21a) portion arranged to lie proximal to the first axial
end (2a) of the cylinder housing, an intermediate portion (21b) and a rear axial portion
(21c) arranged to lie distal to the first axial end of the cylinder housing and wherein
the front axial portion exhibits a first inner diameter, (d1); the intermediate axial
portion exhibits a second inner diameter (d2) which is larger than the first diameter
(d1) and the rear axial portion exhibits a third inner diameter (d3), which is smaller
than the first (d1) and the second (d2) diameters.
7. A lock cylinder arrangement according to claim 6, wherein the locking ring (23) exhibits
an outer diameter (d4), which is smaller than the first (d1) and the second (d2) inner
diameters and larger than the third inner diameter (d3) of the cylinder ring (21),
when the locking ring is received in the circumferential locking groove.
8. A lock cylinder arrangement according to claim 6 or 7, wherein the intermediate portion
(21b) is arranged to abut the lock tab (22c) for pressing the snap hook (22b) into
the snap recess (202) when the cylinder ring (21) is positioned around the cylinder
cap (22) and cylinder housing (2c).
9. A lock cylinder arrangement according to any of claims 6-8, wherein the intermediate
portion (21c) is conical and exhibits the second inner diameter (d2) at an axial end
of said intermediate portion being distal to the front axial portion.
10. A lock cylinder arrangement according to any of claims 6-8, wherein the intermediate
portion exhibits a circumferential recess which defines the second inner diameter.
11. A lock cylinder arrangement according to any of claims 1-10, wherein the locking ring
(23) is resilient for allowing releasable snap fixation in the locking groove (24).
1. Schließzylinderanordnung zur Befestigung an einem Schlossgehäuse und zum Steuern eines
im Schlossgehäuse angeordneten Schließmechanismus, wobei die Anordnung umfasst;
- ein Zylindergehäuse (2c) mit einem ersten axialen Ende (2a), das derart angeordnet
ist, dass es distal zum Schlossgehäuse positioniert ist, und ein zweites axiales Ende
(2b) gegenüber dem ersten axialen Ende, das derart angeordnet ist, dass es proximal
zum Schlossgehäuse positioniert ist;
- einen Zylinderkern (2d), der im Zylindergehäuse drehbar aufgenommen ist;
- einen Zylinderring (21), der um das Zylindergehäuse herum koaxial montierbar ist,
und
- eine Zylinderkappe (22), die um das Zylindergehäuse herum radial innerhalb des Zylinderrings
koaxial montierbar ist, dadurch gekennzeichnet, dass
- der Zylinderring einen radial nach innen hervorstehenden Anschlag (21c) umfasst,
welcher im Zusammenwirken mit einem Schließring (23), der in einer in der Mantelfläche
des Zylindergehäuses angeordneten Schließnut (24) aufgenommen ist, die Axialverschiebung
des Zylinderrings zum ersten axialen Ende des Zylindergehäuses begrenzt; und dadurch,
dass
- das Zylindergehäuse und die Zylinderkappe mit interagierenden Schließmitteln (22a,
22b, 22C, 201, 202) versehen sind, die derart angeordnet sind, dass sie die Axialverschiebung
der Zylinderkappe zum ersten axialen Ende des Zylindergehäuses begrenzen, wenn der
Zylinderring die Schließmittel umgibt.
2. Schließzylinderanordnung nach Anspruch 1, wobei die Schließmittel einen radial nach
innen hervorstehenden Rasthaken (22b) und eine radial nach außen hervorstehende Schließlasche
(22c), die an der Zylinderkappe (22) angeordnet ist, und eine Rastaussparung (202),
die in der Mantelfläche des Zylindergehäuses (2c) angeordnet ist, umfassen, wobei
die Rastaussparung derart angeordnet ist, dass sie den Rasthaken aufnimmt.
3. Schließzylinderanordnung nach Anspruch 2, wobei der Rasthaken (22b) und die Schließlasche
(22c) auf einer elastischen Zunge (22a) von der Zylinderkappe (22) angeordnet sind.
4. Schließzylinderanordnung nach Anspruch 2 oder 3, wobei eine Längsnut (201) in der
Mantelfläche des Zylindergehäuses (2c) angeordnet ist, und die Nut sich von der ersten
Fläche des axialen Endes (2a) des Zylindergehäuses erstreckt und sich zur Rastaussparung
(202) öffnet.
5. Schließzylinderanordnung nach einem der Ansprüche 1 bis 5, wobei die Zylinderkappe
(22) aus einem Metallblech oder aus Polymermaterial gebildet ist.
6. Schließzylinderanordnung nach einem der Ansprüche 1 bis 5, wobei der Zylinderring
(21) einen vorderen axialen (21a) Abschnitt, der derart angeordnet ist, dass er sich
proximal zum ersten axialen Ende (2a) vom Zylindergehäuse befindet, einen Zwischenabschnitt
(21b) und einen hinteren axialen Abschnitt (21c), der derart angeordnet ist, dass
er sich distal zum ersten axialen Ende des Zylindergehäuses befindet, umfasst, und
wobei der vordere axiale Abschnitt einen ersten Innendurchmesser, (d1) aufweist; der
Zwischenaxialabschnitt einen zweiten Innendurchmesser (d2) aufweist, der größer ist
als der erste Durchmesser (d1), und der hintere axiale Abschnitt einen dritten Innendurchmesser
(d3) aufweist, der kleiner ist als der erste (d1) und der zweite (d2) Durchmesser.
7. Schließzylinderanordnung nach Anspruch 6, wobei der Schließring (23) einen Außendurchmesser
(d4) aufweist, der kleiner ist als die ersten (d1) und die zweiten (d2) Innendurchmesser
und größer als der dritte Innendurchmesser (d3) des Zylinderrings (21), wenn der Schließring
in der umlaufenden Schließnut aufgenommen ist.
8. Schließzylinderanordnung nach Anspruch 6 oder 7, wobei der Zwischenabschnitt (21b)
derart angeordnet ist, dass er an der Schließlasche (22c) anliegt, um den Rasthaken
(22b) in die Rastaussparung (202) zu pressen, wenn der Zylinderring (21) um die Zylinderkappe
(22) und das Zylindergehäuse (2c) herum positioniert ist.
9. Schließzylinderanordnung nach einem der Ansprüche 6 bis 8, wobei der Zwischenabschnitt
(21c) konisch ist und den zweiten Innendurchmesser (d2) an einem axialen Ende des
Zwischenabschnitts aufweist, der zum vorderen axialen Abschnitt distal ist.
10. Schließzylinderanordnung nach einem der Ansprüche 6 bis 8, wobei der Zwischenabschnitt
eine umlaufende Aussparung aufweist, welche den zweiten Innendurchmesser definiert.
11. Schließzylinderanordnung nach einem der Ansprüche 1 bis 10, wobei der Schließring
(23) elastisch ist, um eine lösbare Rastbefestigung in der Schließnut (24) zu ermöglichen.
1. Agencement de barillet de serrure destiné à être fixé sur un boîtier de serrure et
à commander un mécanisme de serrure agencé dans le boîtier de serrure, ledit agencement
comprenant :
- un logement de cylindre (2c) ayant une première extrémité axiale (2a) agencée pour
être positionnée de façon distale au boîtier de serrure et une seconde extrémité axiale
(2b) opposée à la première extrémité axiale et agencée pour être positionnée de façon
proximale au boîtier de serrure ;
- un noyau de cylindre (2d) qui est logé de manière à pouvoir tourner dans le logement
de cylindre ;
- une bague de cylindre (21) qui peut être montée coaxialement autour du logement
de cylindre et
- un bouchon de cylindre (22) qui peut être monté coaxialement autour du logement
de cylindre, radialement à l'intérieur de la bague de cylindre, caractérisé en ce que
- la bague de cylindre comprend une butée radialement en saillie vers l'intérieur
(21c) qui, en coopération avec une bague de verrouillage (23) reçue dans une rainure
de verrouillage (24) agencée dans la surface d'enveloppe du logement de cylindre,
limite le déplacement axial de la bague de cylindre en direction de la première extrémité
axiale du logement de cylindre ; et en ce que
- le logement de cylindre et le bouchon de cylindre sont dotés de moyens de verrouillage
en interaction (22a, 22b, 22c, 201, 202) qui sont agencés pour limiter le déplacement
axial du bouchon de cylindre en direction de la première extrémité axiale du logement
de cylindre lorsque la bague de cylindre entoure ledit moyen de verrouillage.
2. Agencement de barillet de serrure selon la revendication 1, dans lequel le moyen de
verrouillage comprend un mousqueton radialement en saillie vers l'intérieur (22b)
et un onglet de verrouillage (22c) radialement en saillie vers l'extérieur agencée
sur le bouchon de cylindre (22) et un évidement de mousqueton (202) agencé dans la
surface d'enveloppe du logement de cylindre (2c), lequel évidement de mousqueton est
agencé pour recevoir le mousqueton.
3. Agencement de barillet de serrure selon la revendication 2, dans lequel le mousqueton
(22b) et l'onglet de verrouillage (22c) sont agencés sur une languette résiliente
(22a) du bouchon de cylindre (22) .
4. Agencement de barillet de serrure selon la revendication 2 ou 3, dans lequel une rainure
axiale (201) est agencée dans la surface d'enveloppe du logement de cylindre (2c),
laquelle rainure s'étend à partir de la surface de première extrémité axiale (2a)
du logement de cylindre et ouvre dans l'évidement de mousqueton (202).
5. Agencement de barillet de serrure selon l'une quelconque des revendications 1 - 5,
dans lequel le bouchon de cylindre (22) est formé d'un métal en feuille ou d'un matériau
polymère.
6. Agencement de barillet de serrure selon l'une quelconque des revendications 1 - 5,
dans lequel la bague de cylindre (21) comprend un partie axiale avant (21a) agencée
pour reposer de façon proximale à la première extrémité axiale (2a) du logement de
cylindre, une partie intermédiaire (21b) et une partie axiale arrière (21c) agencée
pour reposer de façon distale à la première extrémité axiale du logement de cylindre
et dans lequel la partie axiale avant présente un premier diamètre intérieur (dol)
; la partie axiale intermédiaire présente un deuxième diamètre intérieur (d2) qui
est plus grand que le premier diamètre (d1) et la partie axiale arrière présente un
troisième diamètre intérieur (d3) qui est plus petit que les premier (d1) et deuxième
(d2) diamètres.
7. Agencement de barillet de serrure selon la revendication 6, dans lequel la bague de
verrouillage (23) présente un diamètre extérieur (d4) qui est plus petit que les premier
(d1) et deuxième (d2) diamètres intérieurs et plus grand que le troisième diamètre
intérieur (d3) de la bague de cylindre (21) lorsque la bague de verrouillage est reçue
dans la rainure de verrouillage circonférentielle.
8. Agencement de barillet de serrure selon la revendication 6 ou 7, dans lequel la partie
intermédiaire (21b) est agencée pour venir buter contre l'onglet de verrouillage (22c)
pour appuyer le mousqueton (22b) dans l'évidement de mousqueton (202) lorsque la bague
de cylindre (21) est positionnée autour du bouchon de cylindre (22) et du logement
de cylindre (2c).
9. Agencement de barillet de serrure selon l'une quelconque des revendications 6 - 8,
dans lequel la partie intermédiaire (21c) est conique et présente le deuxième diamètre
intérieur (d2) à une extrémité axiale de ladite partie intermédiaire étant distale
de la partie axiale avant.
10. Agencement de barillet de serrure selon l'une quelconque des revendications 6 - 8,
dans lequel la partie intermédiaire présente un évidement circonférentiel qui définit
le deuxième diamètre intérieur.
11. Agencement de barillet de serrure selon l'une quelconque des revendications 1 - 10,
dans lequel la bague de verrouillage (23) est résiliente pour permettre une fixation
de mousqueton libérable dans la rainure de verrouillage (24).