SK500392011A3 - Lock and key - Google Patents

Abstract

Disclosed is a lock and a key where the lock has at least one locking cylinder lock (1) rotatably mounted in its casing (2), and being provided at its inner end with an outer radial groove (10) with a securing member placed therein for axial securing the position of the cylinder lock (1) in the lock casing (2) body wherein a flat key (7) shaft (4) intended for the control of the lock is provided on its one edge with cutouts for bearing and adjusting lock key guards while on its opposite back side it is provided with at least one shaped cutout. In the region between the outer radial groove (10) and face of the cylinder lock (1) the cylinder lock (1) is provided with another radial groove (9) for inserting therein a ring-shaped segment of a stop member (3) secured in its position by at least one bent end, which is fastened in the cylinder lock (1) body. The stop member (3) cooperates with the lock key (7), the flat shaft (4) of which has on its opposite back side an upward open notch with a stop surface (11) arranged substantially perpendicular relative to longitudinal axis of the key (7) and formed by the rear side of the notch wherein the front side of the shaped notch opens obliquely in the direction towards the tip of the key (7) shaft (4) and wherein in functional position of the inserted key (7) the stop surface (11) of the key (7) shaft (4) bears on the stop member (3) in order to secure a required position of a closure on the key (7) bottom side counter the key guards and the lock locking pins, whereby the lock casing (2) is provided opposite to the stop member with a recess (14) the shape and depth of which correspond to the shape and thickness of the stop member (3) ring-shaped segment.

Description

Technical field

It is an object of the invention to provide a lock with at least one locking cylinder and a key for operating the lock.

BACKGROUND OF THE INVENTION

Known embodiments of the cylinder lock key are supported by a protrusion in the lower or side edge of the key shank in its transition portion facing the key head on the face of the lock cylinder, thereby defining the position of the closure formed at the lower edge of the key shank and tumbler bores pins in the cylinder and lock body. This arrangement requires relatively precise machining of the insert face, which may affect the function of the lock. In other embodiments, the protrusion in the region of the flat key tip rests on a fixed stop that is secured in the recess of the lock slide at its inner end, see, for example, US Patents 3298211, 5176015, 5507163 and 6079240, British Patents 181429, 2361505 and 2413152 or European patent These constructions do not allow the stop member to be positioned at any point along the length of the lock insert and thus to operate the lock with a different number of tumblers with a key in which the distance of the stop surface of its stem from the tip of the key is constant for different numbers of tumbler slots. This means that the keys with the same groove depth for tumblers can be used to operate locks with a different number of tumblers.

The weakened portion of the key shank in its end region may also result in inaccurate guidance of the key in the insert, which, in prolonged use, may result in a lock malfunction because the key does not have the desired vertical position. Another disadvantage is the reduced key lifetime, as the locking pins of the lock extend over the separation plane and mechanically abrade the insert, which may be the reason that these flat key designs and locks have not found wider application in the market.

It is an object of the present invention to improve the operation of the lock and to enable the operation of the locks

- a single key in cases where the cylindrical inserts have different numbers of tumblers, for example five or six, etc., provided that the respective number of closures from the stop surface for the key stop means towards the key head coincide therein. This can increase the level of security, distribution and combination capabilities of individual keys.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a lock and key, wherein the lock has at least one lock cylinder rotatably mounted in its housing, which is provided at its inner end with an outer radial groove with an interlocking member inserted therein to axially secure the position of the insert in the housing. The flat key shank for operating this lock has at its one edge cut-outs for engaging and adjusting the lock tumblers and at its opposite back edge at least one shaped cut-out. SUMMARY OF THE INVENTION In the region between an outer radial groove with an interlocking member and a liner face, the liner is provided with a further radial groove for receiving an annular segment of a stop member secured in position by at least one curved end fastened in the liner body. The lock member cooperates with a lock key, the flat shaft of which has an upwardly open notch on its opposite back edge substantially with a perpendicular stop surface disposed relative to the longitudinal axis of the key and formed by the rear of the notch and where the front of the shaped notch opens obliquely towards the tip key. The key surface of the key shank is supported on the stop member in the operative position of the inserted key to secure the desired position of the lock on the lower side of the key against the tumblers and lock locking pins, the lock housing being provided with a recess against the stop member with shape and depth corresponding to shape and thickness an annular segment of the stop member. The stop member may have a circular or rectangular cross-section, the radial groove for receiving the stop member may have a rounded or flat bottom.

The insert face may be provided with a pin under the key channel that extends as far as the first locking pin in the lock insert. This increases the mechanical resistance of the lock to its misuse, thus to its drilling and use

-3 unauthorized key with conventional shaped stop as a bumping applicator.

It is a further object of the present invention to provide a key for operating a lock as described above, the flat shaft of which has slots at one of its edges to engage and adjust the lock tumblers. On its opposite back edge, it has an upwardly open notch with a substantially perpendicular stop surface disposed relative to the longitudinal axis of the key, which is formed by the rear of the notch, the front side of this shaped notch opening obliquely towards the tip of the key shank.

The advantage is the possibility of variable positioning of the stop in the longitudinal axis of the insert and corresponding cut-out in the upper back edge of the shank to achieve a higher level of control of the production of keys. Furthermore, the advantage is the accurate guiding of the flat key in the lock cylinder and the increased service life of the lock and flat key combination, whereby mechanical abrasion of the lock cylinder by the locking pins is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings show exemplary embodiments of the present invention. In FIG. 1 shows an embodiment of a flat key for a cylinder with a cylinder lock, wherein the key shank has slots at one of its edges for locating and adjusting the lock tumblers and has an upwardly open slot on its opposite back edge with a substantially perpendicular stop surface disposed relative to the longitudinal axis of the key; which is formed by the rear side of the notch, wherein the front side of the shaped notch opens obliquely towards the tip of the key shank.

In FIG. 2 is an axonometric view of a cylindrical insert assembly with a flat key inserted according to the invention, wherein the stop surface of the key at the upper edge of its shaft is supported by a stop member formed by an annular segment inserted into a radial groove in the insert facing the end outer radial groove inserts for inserting the axial securing ring of the cylinder in the lock housing body.

The ring-shaped annular segment has a circular cross-section and its bent ends are fixed in the insert body to secure its position.

In FIG. 3 is a detail of the annular segment of the stop member of FIG. 2. The stop surface in the upper back edge of the flat key shank is supported on the annular segment of the stop member in the functional retracted key position. In FIG. 4A is a front view of an annular segment of a stop member that is in the form of a ring with two curved ends, and FIG. 4B is a front view of an annular segment of a stop member of another embodiment, which is in the form of a quadrant with one curved end.

In FIG. 5 is a front view of the inner end side of the liner where a retaining ring is inserted and secured to the outer radial groove of the liner to support the inner end wall of the housing and to axially secure the position of the cylinder in the lock housing body. In FIG. 6 and 7 is an axonometric and cross-sectional view of the inner end side of the insert with an interlocking ring and radial groove with a rounded bottom for receiving an annular segment of the stop member. In FIG. 7 also shows a lock housing region with a recess against a stop member whose shape and depth correspond to the shape and thickness of the annular segment of the stop member; FIG. 8 is a detail of this recess.

In FIG. 9 shows an embodiment of a shank of a flat key with a different location of the shaped notch of the upper back edge along the length of the key shank defining the desired position of the closure on the key against the tumblers and locking pins in the cylinder liner.

In FIG. 10 to 12 are axonometric views of a cylinder lock cylinder with an outer radial groove of the insert for inserting the circlip and a radial groove with a rounded or flat bottom for insertion of the annular segment of the stop member. The location of the radial groove for receiving the stop member in the axial axis of the insert substantially corresponds to the individual embodiments of the key shank of FIG. 9th

FIG. 13 shows three embodiments of a flat key with a shaped notch in the upper back edge of the key shank of FIG. 1 and FIG. 9, which allows a combination of four, five and six-bar systems. The key in the embodiment on the left side of FIG. 13, it is possible to control the cylinder locks with a lower number of tumblers (the key on the right side of FIG. 13 is to control four tumblers, the key in the middle in FIG. 13 to control five tumblers and the key on the right side of FIG. 13 to control six tumblers) provided that the corresponding number of closures from the stop surface to the stop member in the direction of the key head coincides.

In FIG. 14 shows the outer face of a cylinder lock cylinder with a partially inserted flat key according to the present invention. The space at the front of the insert, which has been released after the original conventional key of the flat key has been moved inside the insert, is used here to strengthen the front of the insert. A pin is pressed into the face of the insert with some play, which, when an unauthorized key hits a conventional key stop, the so-called dynamic bumping method, locks the first locking pin of the lock and disables the lock function.

DETAILED DESCRIPTION OF THE INVENTION

The lock according to the invention has two coaxial locking cylinders I with a key channel for a flat key 7, each of which is rotatably mounted in its housing 2, both of which are connected to each other at the bottom by a bridge (not shown). Moreover, the two cylindrical inserts 1 are held together by the locking rings 8 and are fitted with a clutch which is slidably but non-rotatably relative to the lock operating tooth, mounted in the axis of rotation of the control tooth body situated in the gap between the two inserts 1. In the key channel of each insert 1 the upper ends of the radial manholes of the lock are arranged in a row, in which the setting pins are slidably mounted, the upper ends of which cooperate with the coding formed at the lower narrow edge of the flat key 7 and locking pins that are spring-loaded in the bores of the sleeve 2, coaxial with the respective shafts in the insert J. in the functional locked position of the insert L

Each liner 1 is provided on its end inner side with an outer radial groove 10 into which a locking ring 8 (Figs. 5, 6,7) is inserted and secured against sliding, serving to axially secure the position of the liner also in the housing 2 of the lock. The protrusions 6 at both ends of the locking ring 8 engage, after insertion into the outer radial groove 10, into the transverse groove 5 in the inner end region of the insert 1. Each insert 1 is further provided with a radial groove 9 with a rounded or flat bottom for receiving a stop member 3, which is formed by a steel annular segment, for example a semicircle or quadrant, whose bent ends or ends are fixed in the insert body 1 (e.g. or an opening in the insert 1 (FIG. 4) and locks the stop member 3 in its position.

The radial groove 9 with a rounded or flat bottom, for insertion of the annular segment of the stop member 3, can be directly connected to the outer radial groove 10 of the insert also for inserting the locking ring 8 (Fig. 10). the axial position of the outer radial groove 9 (FIG. 11), or it may also be further away from it (FIG. 12).

A flat key 7 according to the invention cooperates with the lock thus arranged, the shaft 4 of which has a shaped notch at its upper back edge with a stop surface 11. The stop surface 11 of the flat key 7, which defines the desired position of the closure on the key 7 against the tumblers and locking pins in both the cylinder lock and the lock, rests on the stop member 3 which is inserted into the radial grooves 9 in liner i. The key shank 4 has slots on one of its edges for locating and adjusting the tumbler tumblers and, on its other, opposite back edge, has a substantially perpendicular stop surface 11 which is formed in the direction of the tip of the key 7 by a rearwardly shaped recess embedded in The shaped shank with a relatively small width is rounded in its bottom and its front side opens obliquely towards the tip of the shank 4 of the key 7. Unlike the documents cited in the prior art paragraph, the key shank is not in its end region attenuated and more precisely guided in the key channel of the lock cylinder.

In this case, there is no extension of the locking pins of the lock over the separation plane with subsequent mechanical abrasion of the lock insert I, which increases the service life of the key and the lock. When inserting the key 7 into the lock insert 1, its inclined lead-in surface on the tip slides along the bottom surface of the spring ring of the stop member 3, lifts it and then pushes it into the recess 14 in the housing 2. in which under the ring of the stop member 3 there is a notch in the shank 4 of the key 7, the ring of the stop member 3 engages in this notch and the stop surface 11 abuts against this ring of the stop member 3. The shank 4 acts to push the ring of the stop member 3 into the recess in the housing 2 and then the key 2 slides on the bottom surface of the stop member 3 until the key is removed from the insert.

In FIG. 9 shows an intermediate embodiment of the key shank 4 of FIG. 1, with a different location of the shaped notch of its upper back side along the key 7. In FIG.

to 12 are axonometric views of a cylinder 1 of a lock having an outer radial groove 10 for receiving a circlip 8 and a radial groove 9 with a rounded bottom for receiving a stop member 3. The position of the radial groove 9 for receiving a stop member 3 in the axial axis of the insert 1 essentially corresponds of individual embodiments of the key shank 4 of FIG. 9. The advantage is the possibility of variable positioning of the stop in the longitudinal axis of the insert I and corresponding notch in the upper back edge of the shank 4 for a higher level of control of the production of the keys. In FIG. 13 shows three different embodiments of a key 7 that allows a combination of a four, five and six-pin system where the key 7 in the solution on the left side of FIG. 13, it is possible to control cylinder locks X with a lower number of tumblers (the key on the right side of FIG. 13 is for controlling four tumblers, the key in the middle of FIG. 13 for controlling five tumblers and the key on the right side of FIG. 13 for controlling six tumblers) provided that the corresponding number of closures from the stop surface for the stop member 3 in the direction of the key head 7 coincides. In this way, it is possible in a simple manner to create systems with a slave and master key and insert and to control, for example, five-key systems with a six-key key and the like. In FIG. 14 shows the outer face of the cylinder lock cylinder X with a partially inserted flat key 7 according to the present invention. The space in the face of the insert X, which has been released after the original conventional stop of the flat key inside the insert, is used here to reinforce the insert face 12. A pin 13 is pressed into the insert 1 with some play, which extends beyond the face 12 of the insert X and which, when impacted by a conventional key stop by a dynamic bumping method, locks the first lock pin and thus disables the lock function. This increases the mechanical resistance of the lock to its misuse, i.e. to its drilling and to the use of an unauthorized key with a conventional shaped stop as a bumping applicator.

Industrial usability

The present invention is applicable to locks with a cylindrical insert and a flat key.

Claims (4)

PATENT CLAIMS Lock and key, wherein the lock has at least one locking cylinder (1) rotatably mounted in its housing (2), which is provided at its inner end with an outer radial groove (10) with an interlocking member for axially locking the insert ( 1) in a lock body (2) of the lock and wherein the shank (4) of the flat key (7) for operating the lock has cut-outs for engaging and adjusting the lock tumblers on one of its edges and at least one shaped cut-out on its opposite back edge that in the region between the outer radial groove (10) and the face of the insert (1), the insert (1) is provided with another radial groove (9) for inserting an annular segment of the stop member (3) secured in its position by at least one curved end fastened in the body of the insert (1), whereby the lock key (7) cooperates with this stop member (3), the flat shaft (4) of which has an upwardly opposed ridge on its back edge formed by a notch with a stop surface (11) arranged substantially perpendicular to the longitudinal axis of the key (7) and formed by the rear side of the notch, the front side of this shaped notch opening obliquely towards the tip of the key (4) of the key (7); the surface (11) of the key (7) of the key (7) rests on the stop member (3) in the operative position of the inserted key (7) to secure the desired position of the closure on the underside of the key (7) against the tumblers and lock pins. the lock housing (2) is provided with a recess (14) opposite the stop member (3), the shape and depth of which correspond to the shape and thickness of the annular segment of the stop member (3). Lock and key according to claim 1, characterized in that the stop member (3) has a circular or rectangular cross-section. Lock and key according to claim 2, characterized in that the radial groove (9) for receiving the stop member (3) has a rounded or flat bottom. Lock and key according to one of Claims 1 to 3, characterized in that the face of the insert (1) is provided below the key channel with a pin (13) which extends up to the first locking pin in the lock insert (1). -11- 12.5. A lock control key according to any one of claims 1 to 4, wherein its flat shaft (4) has cut-outs on one of its edges for engaging and setting lock tumblers, characterized in that it has an upwardly open slot substantially upwardly open at its opposite back edge. a perpendicular stop surface (11) disposed relative to the longitudinal axis of the key (7), which is formed by the rear side of the notch, the front side of the shaped notch opening obliquely towards the tip of the key (4) of the key (7).