CZ305479B6 - Lock barrel and cylinder lock - Google Patents

Abstract

In the present invention, there is disclosed a lock barrel (2) for a cylinder lock, which comprises a key channel (9) for inserting therein a flat key (14) with a code edge (20) on one side and a guide edge (21) on the other side, at least one radial channel (8) entering into the key channel (9) and at least one coding tumbler (10) mounted slidably in the radial channel (8). The lock barrel (2) is provided with on its outer circumference with at least one slot (22, 25) arranged at a certain distance from both the inlet and end of the key channel (9). In said slot (22, 25), there is removably arranged at least one guide stop (23, 26) having a bearing surface, which at least partially mates with cylindrical surface of the lock barrel (2), and a working area, a portion oc which reaches into the key channel (9) in its region for guiding the key (14) guide edge (21), whereby the guide stop (23, 26) has in the area, by which it reaches into the key channel (9), at least one cutout for guiding the key (14) guide edge, whereby said cutout is narrower in the radial cross section through the lock tumbler if compared with the key channel (9) in its region for guiding the key (14) guide edge.

Description

Technical field

The invention relates to a cylinder lock for a cylinder lock comprising a key channel for inserting a flat key with a code edge on one side and a guide edge on the other, at least one radial channel opening into the key channel and at least one coding tumbler mounted in the radial channel. The invention also relates to a lock with such a cylindrical insert and to a lock and flat key assembly.

BACKGROUND OF THE INVENTION

Locks with cylindrical inserts, which contain tumblers for lock coding, are known. The prior art cylinder lock comprises a housing in which a cylindrical insert with a key-receiving channel is received. Guide shafts are formed in the housing in which the locking tumblers are supported slidingly supported by the spring elements, while in the cylindrical insert radial channels are formed in which the coding tumblers are received. The length of each tumbler and its sequence creates a code that matches the depths of the notches / protrusions on the correct key. In the state of insertion of the correct key into the cylinder lock, one guide shaft and one radial channel are connected to each other and are coaxial. At the same time, the interlocking tumblers and the coding tumblers disposed therein are coaxially arranged, the contact surface between the interlocking tumbler and the coding tumbler being arranged in the separating cylindrical surface, i.e. the cylindrical surface of the outer surface of the insert, respectively. inner surface of the housing. Code edge of the key, resp. its slots and protrusions, when inserted into the key channel, come into contact with coding tumblers that push radially toward the respective guide shaft, the coding tumblers pushing the tumblers into the shaft so that the contact surface between each pair of coding tumblers and the tumbler tits with dividing cylindrical surface. Conversely, if no key is inserted into the lock, the locking tumblers are partially removed from the guide shaft due to the action of the spring elements, so that they interfere with said separating cylindrical surface and prevent rotation of the cylindrical insert in the housing. If a key with an incorrect code is inserted into the key channel, the coding tumblers on some guide shafts and the blocking tumblers interfere with some guide shafts.

In addition, the key insertion channel may have different longitudinal grooves and longitudinal ribs, the profile of the correct key for a given lock or key. its cross-sectional shape must then match that of the key channel. This creates an additional lock security element.

The goal is to create as many code variations as possible for a particular lock type. The number of tumblers and the number of longitudinal grooves is limited by the acceptable key length and width.

Further, keys are known which have a code edge on both sides and their respective lock has two sets of sliding tumblers, the coding tumblers of one set abutting on one code edge and the coding tumblers of the other set on the other code edge. In addition, keys with dimples in the side surface are known, in which coding tumblers movable in the lock in a radial direction perpendicular to the direction of the tumblers fit into the code edge of the key. Both of these solutions greatly increase the construction and assembly demands of the lock. Further, CZ 23209 discloses a cylindrical insert having a circumferential slot for receiving a stop member on which the key inserted into the lock rests with its flat perpendicular to the key axis and arranged on the upper edge of the key and defining the correct key insertion depth. However, this solution does not allow leading the upper key edge from the side or significantly increase the key shape variability.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to increase the number of security elements, respectively. possible variations of a particular lock without significantly increasing the assembly effort and the number of individual parts of the structure.

- 1 GB 305479 B6

SUMMARY OF THE INVENTION

This object is solved by a cylinder lock cylinder comprising a key channel for inserting a flat key with a code edge on one side and a guide edge on the other, at least one radial channel opening into the key channel and at least one coding tumbler mounted slidably in the radial channel. The cylindrical liner is provided on its outer periphery with at least one cut-out spaced from the inlet and the end of the key channel, the cut-out having at least one guide stop having a abutment surface at least partially flush with the cylindrical surface of the cylindrical liner. , a portion of which extends into the key channel in its region for guiding the leading edge of the key. The guiding stop has at least one key leading edge guiding region in the region that extends into the key channel, which in radial cross section is narrower than the key channel in its key leading edge region.

In a preferred embodiment, the cylindrical insert is provided with a first slot with a first guide stop and a second guide slot with a second guide stop, wherein the shapes of the first guide stop and the second guide stop in their region of engagement with the key channel may differ from each other.

It is also preferred that the at least one guide stop has an arcuate shape and is in the form of a sheet metal blank or blank, wherein the radius of the outer arc of said arcuate shape of the guide stop corresponds to the radius of the cylindrical insert. the radius of the inner arc of said arcuate shape of the guide stop.

The above object is also solved by a cylinder lock that includes

- a sleeve with a cylindrical cavity and at least one guide shaft arranged radially with respect to the cylindrical cavity of the sleeve,

at least one locking tumbler mounted slidingly in the guide shaft, and

- at least one spring mounted in the guide shaft for pushing the locking tumbler from the guide shaft to the cylindrical cavity, and

the above-described cylindrical insert rotatably arranged in the cylindrical cavity of the housing such that said at least one radial channel is adjustable to a position in which it is coaxial with a guide shaft in the housing.

Advantageously, a coding tumbler is provided in the radial channel having a support end for contact with the tumbler tumbler and a working end which includes a recess in which a contact element is provided, which is secured against sliding out of the recess in the longitudinal axis of the coding tumbler. and in at least one region it has a circular cross-section for rolling contact with the code edge of the cylinder lock key.

It is also preferred that the contact element is in the form of a ball or a roller or a barrel.

The radial channel may be provided with guiding recesses for guiding the coding tumbler, the guiding recesses being enlarged in the region of their opening into the radial channel to form abutment surfaces for the contact element.

The above object is also solved by a cylinder lock and a flat key assembly with a code edge and a guide edge, the assembly comprising the aforementioned cylinder lock and a key, the guide edge of which is provided with at least one guide recess extending parallel to the longitudinal axis of the key and which, when the key is inserted into the key channel, engages a portion of the guide stop extending into the key channel.

-2 CZ 305479 B6

Clarification of drawings

An exemplary embodiment of the invention is shown schematically in the drawings, wherein Fig. 1 is a partial cross-section of the cylinder lock according to the invention; Fig. 2 is a vertical longitudinal section through the lock of Fig. 1; Fig. 4 is a view of a key of an assembly according to the invention. For better clarity, the illustrations in the drawings are considerably enlarged.

DETAILED DESCRIPTION OF THE INVENTION

An exemplary embodiment of a lock according to the invention comprises a sleeve 1 with a cylindrical cavity in which a cylindrical insert 2 is received. In the drawings, the lock is shown with a pair of sleeves 1 and cylinders 2, i.e. with a cylindrical insert 2 for each side of the door. A pair of cylindrical inserts 2 are connected to each other via the clutch assembly 15 and a control panel 16 is provided between them for actuating the bolt. The housing parts 1 belonging to each of the pair of cylinders 2 are interconnected by a bridge 17 in which there is an anchor hole 18 for anchoring the lock in the door and which at the same time form an assembly closure 4 for both housings 1. snap pins.

The housing 1 comprises a plurality of guide shafts 3 which open into a cylindrical cavity and whose axes are perpendicular to the longitudinal axis of the cylindrical cavity. The guide shafts 3 are closed from the outside of the housing by a mounting cap 4 with a locking pin 5. A locking tumbler 6 is slidably inserted in each guide shaft 3 between the mounting cap 4 and the locking tumbler 6.

The cylindrical insert 2 comprises a plurality of radial channels 8 which, by rotating the cylindrical insert 2 in the housing 1, can be aligned with the guide shafts 3 so that a radial channel 8 is coaxially connected to each guide shaft 3. The key channel 9 has radial channels 8.

A coding tumbler 10 is slidably mounted in each radial channel 8, which has a support end 11 with a contact surface for contact with the tumbler 6 and, optionally, an inner surface of the cylindrical cavity of the housing 1, and a working end 12 for contact with the code edge 20 of the key 14 .

On the side opposite to the radial channels 8, a first cut-out 22 and a second cut-out 25 are formed in the cylindrical insert 2 and a first arcuate-shaped guiding stop 23 is inserted into the extent of the cut-out 22. the inner surface may extend at least partially into the key channel 9, being adapted to guide the sliding movement of the key 14 through the key channel 9, and may prevent complete insertion of the wrong key into the lock by forming a stop by which the wrong key stops if its guide the edge 21 is not provided with a respective first guide recess 24.

A second guide stop 26 is similarly inserted into the second slot 25 with a function similar to the first guide stop 23. The second guide stop 26 can extend into the key channel 9 so that the respective second guide recess 27 on the key 14 is on the other side of its guide edge 21, not on the same side but deeper.

It is also possible to design with only a first cut-out 22 and a first guide stop 23 which extends into the key channel 9 such that the key 14 has to be provided with a guide recess 24, 27 on both sides of its guide edge 21, or 14 must be provided with a guide recess 24 on only one side of its guide edge 21.

The above-described method provides a structurally and assemblyly simple element which makes it possible to realize a number of variants of the code of the respective key-lock pair. The code is thus given by a unique combination consisting not only of the number, spacing and length of the individual tumblers 10 and the profile of the key channel 9 with its longitudinal ribs and recesses extending over the entire length of the key channel 9, but also the shape of each guide stop 22 inserted. 25 in the area in which it extends into the key channel 9, by the number of guiding stops 22, 25 inserted and their distances from the entrance of the key channel 9.

If the key is not provided with the respective guide recess 24, 27, it is pivoted against the guide stop 23, 26 and cannot be fully inserted into the key channel 9 and thus the lock cannot be opened with it. The guide stops 23, 26 are not visible unlike the profile of the key 14 without disassembling the lock and thus unauthorized persons cannot estimate whether and possibly what or what guiding recesses 24, 27 should have the corresponding key 14.

In addition, the guide recess 24, 27 helps to correctly guide the key in the lock, so that its operation in the lock is smoother.

In this exemplary embodiment of the cylindrical insert 2, the coding tumblers 10 are provided such that the working end 12 comprises a recess in which a ball 13 is rotatably seated, which is adapted for rolling contact with the code edge 20 of the key 14, i.e. its protrusions and cutouts. engaging the key 14 in the key channel 9 and extending it.

Both the tumbler tumblers 10 and the tumbler tumblers 6 are thus mounted radially sliding relative to the cylindrical insert 2, i.e. sliding in a direction perpendicular to the longitudinal axis of the cylindrical cavity or key channel

9.

The radial ducts 8 comprise guide recesses (not shown) in the cylindrical insert 2 for guiding tumblers 10 in the radial direction. The guide recesses are widened in the area where they open into the key channel 9, thereby forming abutment surfaces for guiding the balls 13 when the coding tumbler 10 slides through the radial channel 8, preventing the ball 13 from sliding out of the recesses when the key 14 moves.

The recess for the ball 13 formed in the working end 12 of the tumbler 10 is in the form of a portion of a cylindrical surface that surrounds the ball 13 with clearance so that in cross section the center of the ball 13 has a circular segment of the circumferential circle of the ball 13 pertaining to the area in the recess in the working end 12 of the coding tumbler 10 has an angle in the range 190 ° to 330 °. In other words, the recess for the ball 13 is designed so that the ball 11 can freely rotate in the recess but cannot move relative to the coding tumbler 10 in the direction of its sliding movement in the radial channel 8. However, another embodiment of the recess shape is possible. Thus, the shape of the recess need not follow the shape of the ball 13, but must provide at least three support points fulfilling the above function.

Obviously, the balls 13 may be replaced by another contact element allowing rolling contact with the code edge 20 of the key 14. For example, such a contact element may have a spherical shape or even a cylindrical shape and the like. Generally, the contact element has a circular cross-section in a plane in which the direction of movement of the key 14 lies when inserted into the lock or retracted. And, as already mentioned, the recess in the working end 12 of the coding tumbler 10 must be adapted to the shape of the contact element so as to be able to rotate about an axis perpendicular to the plane of insertion of the key 14 into the key channel 9 Thus the rolling contact of the contact element with the code edge 20 of the key 14 is realized, that is, when the key 14 moves into or out of the key channel 9, it rotates about its axis in the direction of the key J4 movement. Preferably, the contact element extends beyond the working end 12 of the coding tumbler

10.

The construction of the coding tumbler 10 according to this exemplary embodiment, i.e. its working end 12 with the contact element for rolling contact with the key 14, both reduces the wear of the key 14 and the coding tumbler 10 in operation, and to / from the key channel 9 is significantly smoother

As is known in the art, the coding tumblers 10 may be split, i.e. include a first portion with a support end 11 and a second portion with a work end 12.

Claims (8)

PATENT CLAIMS A cylinder lock cylinder (2) comprising a key channel (9) for inserting a flat key (14) with a code edge (20) on one side and a guide edge (21) on the other, at least one radial channel (8) opening into the key channel (9) and at least one coding tumbler (10) mounted slidably in the radial channel (8), the cylindrical insert (2) having at least one slot (22, 25) spaced apart at its outer circumference from the inlet and the end of the key channel (9), characterized in that at least one guide stop (23, 26) having a abutment surface which is at least partially aligned with the cylindrical surface of the cylindrical insert (2) is detachably inserted in the cutout (22, 25). and a working area, part of which extends into the key channel (9) in its region for guiding the leading edge (21) of the key (14), the guide stop (23, 26) having in the area which extends into the key AC duct (9), at least one cut-out for guiding the edge line keys (14), said cut-away part in the radial cross-sectional profile cylinder is narrower than the key channel (9) in its region for guiding the edge of the guide key (14). Cylinder liner (2) according to claim 1, characterized in that it has a first cut-out (22) with a first guide stop (23) and a second cut-out (25) with a second guide stop (26), wherein the shapes of the first guide stop ( 23) and the second guide stops (26) differ in their region in which they extend into the key channel (9). Cylindrical insert (2) according to claim 1 or 2, characterized in that the at least one guide stop (23, 26) has an arcuate shape and is in the form of a sheet metal blank or blank, the radius of the outer arc of said arcuate shape of the guide stop (23). 26) corresponds to the radius of the cylindrical insert (2), and the inner surface of the slot (22, 25) outside the key channel (9) forms portions of the cylindrical surface whose radius corresponds to the radius of the inner arc of said arcuate shape of the guide stop (23, 26). 4. A cylinder lock that includes - a sleeve (1) with a cylindrical cavity and at least one guide shaft (3) arranged radially with respect to the cylindrical cavity of the sleeve (1), - at least one locking tumbler (6) mounted slidingly in the guide shaft (3), and - at least one spring (7) mounted in the guide shaft (3) for pushing the locking tumbler from the guide shaft (3) to the cylindrical cavity, characterized in that it further comprises a cylindrical insert (2) according to any one of claims 1 to 3 a cylindrical cavity of the housing (1) such that said at least one radial channel (8) is adjustable to a position in which it is coaxial with the guide shaft (3) in the housing (1). A cylinder lock according to claim 4, characterized in that a coding tumbler (10) is slidably mounted in the radial channel (8) and has a support end (11) for contact with the tumbler tumbler (6). ) and a working end (12) comprising a recess in which a play member is provided with a play, which is secured against sliding out of the recess in the direction of the longitudinal axis of the coding tumbler (10), and has at least one region of circular cross section for a code edge (20) of the cylinder lock key (14). -5GB 305479 B6 A cylinder lock according to claim 5, characterized in that the contact element is in the form of a ball (13) or a roller or a barrel. A cylinder lock according to claim 5 or 6, characterized in that the radial channel (8) is provided with guiding recesses for guiding the coding tumbler (10), the guiding recesses being enlarged in the region of their opening into the radial channel (8) to form supporting struts surfaces for the contact element. A cylinder lock and a flat key assembly with a code edge (20) and a guide edge (21), comprising a cylinder lock according to any one of claims 4 to 7 and a key (14) having a guide edge (21) provided with at least one guide recess (24, 27) which extends parallel to the longitudinal axis of the key (14) and into which, after the key (14) is inserted into the key channel (9), engages a portion of the guide stop (23, 26) ).