CZ302949B6 - Coding mechanism for cylinder lock with rotating key and half-finished product of such key - Google Patents

Abstract

In the present invention, there is disclosed a coding mechanism for cylinder lock with a rotating key (12) consisting of a guide element (13) for guiding a shank (14) of the rotating key (12) inside the cylinder lock with rotating key (12) and a rotating key (12), where the guide element (13) is formed by two guide strips (15) arranged parallel to and at a certain distance from each other. The guide strips (15) being at their ends connected by a stop bridge (16) are provided with all over their length with guide surfaces (18). The shank (14) of the rotating key (12), being provided with common coding projections (21) for interaction with common key guards in said cylinder lock, continuously widens in its full cross section from its central region in the direction to at least one of its longitudinal edges (36, 37) and its at least one functional surface of the pair of functional surfaces (38, 39 and 40, 41) opens in the form of ôVö letters. Further, in the central region of its cross section, the rotating key (12) shank (14) is provided with two corresponding longitudinal grooves (22, 23). The invention is characterized in that said longitudinal grooves (22, 23) of the rotating key (12) shank (14) are provided with flat bottoms (24, 25) and the guide surface (18) of at least one of the guide strips (15) of the guide element (13) and the corresponding flat bottom (24, 25) of the longitudinal groove (22, 23) on the rotating key (12) shank (14) adapted in their shape in order to form a locking code of the cylinder lock.

Description

Technical field

BACKGROUND OF THE INVENTION The invention relates to a coding device for a rotary key cylinder lock comprising a guide element for guiding a rotary key shaft within a rotary key cylinder and a rotary key, wherein the guide element is formed by two guide rails spaced from one another. and provided with guide surfaces along its entire length, and the rotary key shaft is provided with conventional coding projections to interact with conventional tumblers in said cylindrical lock and is continuously expanded in its full cross-section from its central region towards at least one of its longitudinal edges and at least one of the pair of functional surfaces it is branched in the shape of the letter "V" and furthermore it has two corresponding longitudinal grooves in the central region of its cross-section.

BACKGROUND OF THE INVENTION

In current cylinder locks, it is desirable to be able to produce as many locking combinations as possible for a particular type and size of lock.

The number of combinations of a particular cylinder lock, which is controlled by a respective rotary key, hereinafter referred to as the key, is usually determined by both the number of possible combinations on the tumblers and thus the number of possible combinations of tumbler elements on the key shaft and the number of possible cross-sectional shapes.

A special subset of cylindrical locks operated by a key are the so-called cylindrical locks with rotary keys operating the tumbler tumblers perpendicular to the key, in which tumbler tumblers are used as tumbler tumblers. Such is, for example, a cylinder lock according to patent CZ 293 659.

In this type of cylinder locks, the number of possible cross-sectional shapes of the key shank is greatly limited in that part of the shank must be adapted to interact with a guide for guiding the key shank within the cylinder lock to prevent unwanted contact between the key, tumblers and other discs. sliding movement of the key shank inside the cylinder lock.

The guide element I (FIG. 1) according to said patent consists of two guide rails 2 arranged in parallel and spaced apart, which are interconnected at the ends by a stop bridge 3. The guide element 1 is fixedly connected to the control cylinder 4, the guide rails 2 being arranged along the through hole The guide rails 2 are provided with guide surfaces 7.

According to the prior art, the guide elements 1 are manufactured as thin bent parts and therefore usually have a rectangular cross section with smooth guide surfaces 7 (Fig. 2).

Even a guide with smooth guide surfaces, in part, affects a key profile compatible with the lock as set forth in the aforementioned patent, but in fact it would be very difficult to use it to form combination rows in one particular type of lock. The profile of the key is influenced by the distance, width and shape of the lateral surfaces of the guide rails, and these parameters cannot be changed without limitations given the strength of the individual components. Also, the fact that the smaller moldings of the moldings fit seamlessly into the larger key grooves and the narrower key easily crosses the larger gap between the moldings makes this coding generally quite limited.

Thus, a conventional modification of the key shank for interacting with the guiding element of the prior art is to provide two opposing grooves 8 in the central cross-sectional area of the shank 9 of the key 6, which correspond to interacting shapes on the guide rails and thus have predominantly flat bottoms 10 without any additional shaped elements. , which would be involved in forming locking combinations 55 of the respective cylinder lock (FIG. 2). If two additional grooves 11 are made in flat bottoms, then they serve only for technological purposes to facilitate the production of the key, but not to create locking combinations.

Thus, the guide surfaces 7 on the guide element 1 and the flat bottoms 10 of the respective grooves 8 on the key 6 are not used in the prior art to form the elements to form locking combinations, resulting in a considerable reduction in the possibilities for increasing the number of locking combinations in a given type of cylinder lock.

For cylindrical locks of other types, keys have already been developed whose cross-sections potentially comprise opposite grooves with other shaped elements on the bottom of these grooves. However, these keys are not suitable for use with the aforementioned cylinder lock type.

An example of such a wrench is, for example, one of the variants of the wrench disclosed in the prior art in EP 0 123 192. The said variant has two opposing grooves in the central part having bottoms formed by surfaces circularly concentric to the central line passing through the shaft cross section. keys and groove walls are formed by surfaces radially extending from said center line. Said key variant according to EP 0 123 192 would be completely unsuitable for a given type of cylinder lock, since the circularly convex bottom of the grooves would require circularly concave shapes of corresponding surfaces on the guide rails and such an embodiment would lead to undesirable weakening of the cross-section of the guide rails.

It is also to be understood that the remainder of the cross-section of the key shank must be such that it can be formed thereon to interact with the tumblers of said type of cylinder lock.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to overcome these disadvantages of existing solutions and to provide a coding device for a rotary key cylinder lock that would increase the potential number of locking combinations for a given cylinder lock type.

It is also an object of the present invention to provide such a rotary key blank for a cylinder lock with said coding device that would make the final key from the blank as simple and cost-effective as possible.

This object accomplishes and obviates the disadvantages of a coding device for a rotary key cylinder lock consisting of a guide element for guiding a rotary key shank within a rotary key cylinder and a rotary key, the guide element being formed by two parallel and spaced guide rails which are at the ends interconnected by a stop bridge and provided with guide surfaces along the entire length, and the rotary key shank is provided with conventional coding lugs to interact with conventional tumblers in said cylinder lock and is continuously expanded in its full cross section from at least one of its longitudinal edges and its at least one of the pair of functional surfaces is open in a "V" shape and further has two corresponding longitudinal grooves in the central region of its cross-section, according to the invention, which is the longitudinal grooves have a bottom surface, a guide surface of at least one of the guide rails, and the corresponding flat bottom of the longitudinal groove on the shaft of the rotary key is shaped to form a lock code of the cylinder lock.

Preferably, the guide surface of at least one of the guide rails is provided with one longitudinal rib and the corresponding flat bottom of the longitudinal groove on the shaft of the rotary key is provided with a co-operating additional groove.

It is also advantageous if the guide surface of at least one of the guide rails is convex and the corresponding flat bottom of the longitudinal groove on the shaft of the rotary key is concave in shape.

. 9 GB 302949 B6

According to the invention, a rotary key blank according to the invention is also advantageous, comprising a shaft which is continuously extended from its central region towards at least one of its longitudinal edges in full cross-section and at least one double functional surface is open in a "V" shape. and is provided with two opposing longitudinal grooves in the central cross-sectional area of its shank, the longitudinal grooves having flat bottoms, the flat bottom of at least one longitudinal groove on the shaft of the rotary key blank having one additional groove to interact with the corresponding longitudinal rib on the guide surface on the guide bar in the cylinder lock.

It is also preferred that the longitudinal grooves have flat bottoms, wherein the flat bottom of the at least one longitudinal groove on the shaft of the rotary key blank is concave to interact with a corresponding convex guide surface on the guide bar in the cylinder lock.

An advantage of the invention is that it makes it possible to create additional locking combinations in rotary key cylinders operating the tumbler tumblers perpendicular to the rotary key, thereby reducing the risk of unlocking a particular cylinder lock with a key similar to that of the lock.

An advantage of the inventive rotary key blank is the simplification of manufacturing the final rotary key by simply removing excess material to form a conventional set of coding lugs for interaction with tumblers.

The shape-guided element according to the invention can be relatively easily manufactured in a known manner by casting a steel powder substrate at temperatures for bonding the crystals by surface tension - the so-called MIM method.

Overview of the drawings

The accompanying drawings show, on the one hand, a known embodiment of a guiding element and a rotary key for a cylinder lock with a rotary key operating the tumbler tumblers perpendicular to the key, and an exemplary embodiment of the invention. FIG. 2 shows a front view of a rotary key inserted into a guide element according to the prior art; FIG. 3 shows a sectional view of a guide element with a rotary key inserted according to the state of the art, taken along a plane; Fig. 111 - III in Fig. 2 on a larger scale, Fig. 4 a side view of a guide element according to a first exemplary embodiment of the invention; Fig. 5 a sectional view of a guide element according to a first exemplary embodiment taken along the plane V-V in Fig. 4; 6 is a front view of a rotary wrench according to a first exemplary embodiment; FIG 6, FIG. 8 shows a front view of a rotary wrench inserted in the guide element according to the first embodiment, FIG. 9 shows a sectional view along the plane of the coding device according to the first embodiment; Fig. IX-IX in Fig. 8 on an enlarged scale, Fig. 10 a front view of a rotary wrench inserted in a guide element according to a second exemplary embodiment; Fig. 11 a section through a coding device according to a second exemplary embodiment; Fig. 12 is an enlarged front view of a rotary wrench inserted in a guiding element according to a third exemplary embodiment; Fig. 13 is a sectional view of the coding device according to a third exemplary embodiment taken along line XIII-XIII in Fig. 12 on an enlarged scale; 14 is a front view of a rotary key blank according to a first exemplary embodiment; FIG. 15 is a cross-sectional view of the shaft of the blank Fig. 16 is a front elevational view of the rotary key blank of the second exemplary embodiment; Fig. 17 is a cross-sectional view of the rotary key blank of the second exemplary embodiment; according to the plane XVII - XVII in FIG. 16 on an enlarged scale, FIG. 18 a front view of a rotary wrench blank according to a third exemplary embodiment

And FIG. 19 is an enlarged cross-sectional view of a shank of a rotary key blank of the third exemplary embodiment taken along the XIX-XIX plane of FIG. 18.

DETAILED DESCRIPTION OF THE INVENTION

A coding device for a cylinder lock with a rotary key 12, hereinafter the key 12, according to a first exemplary embodiment of the invention (Fig. 4), comprises a guide element 13 for guiding the key shank 14 inside the cylinder lock and a key shank 14 adapted to each other. for forming locking combinations of said cylinder lock by the methods described below in each exemplary embodiment.

The guide element 13 (FIG. 4) is formed in a known manner by two guide rails 15 which are spaced apart and spaced apart and which are interconnected at the ends by a stop bridge 16. This guide rail 15 strengthens and at the same time forms a stop for the tip of the key shank 14.

The guide rails 15 extend perpendicularly along a conventional keyhole through hole 12 in the control cylinder 17 to which the guide element 13 in the cylinder lock assembly is rigidly connected but which does not form part of the coding device.

The guide rails 15 are provided on their inner sides with guide surfaces 18 (FIG. 5) which, when the key 12 is inserted into the cylindrical lock, guide the shank 14 of the key 12 and hold it against turning in a horizontal direction.

According to a first exemplary embodiment, the guide surfaces 18 on both guide rails 15 are provided with shape-identical mirror-inverted longitudinal ribs 19, 20 which are equally spaced from the edges of the guide surfaces T8 (FIG. 5).

The shank 14 of the rotary key 12 (FIG. 6) is provided with a conventional set of coding lugs 21 to interact with conventional tumblers (not shown) in a cylindrical key lock 12.

The shank 14 is also provided on both sides in its central region with conventional longitudinal, mirrored longitudinal grooves 22, 23 (FIG. 7) for guide rails 15. These longitudinal grooves 22, 23 are defined by their flat bottoms 24, 25 and side walls 26. , 27 and 28, 29.

The flat bottoms 24, 25 in the longitudinal grooves 22, 23 of the shank 14 are, according to the first exemplary embodiment, provided with corresponding additional grooves 30, 31 which correspond in shape and size and also to their respective longitudinal ribs 19, 20 formed on the guide surfaces 18. .

The central region of the shank 14 is terminated by side protrusions 32, 33, 34, 35 which form said side walls 26, 27 and 28, 29.

From the central region of the shank 14 towards its longitudinal edges 36, 37, the shank 14 is continuously expanded in its full profile so that its functional surfaces 38, 39 and 40, 41 are open in a V-shape. It is also possible for some types of cylinder locks to extend the stem 14 continuously from the central region in only one direction, for example towards one longitudinal edge 36, so that the respective functional surfaces 40, 41 would in this case be parallel.

The shaft 42 of the blank 12 for manufacturing the rotary key 12 (FIG. 14) for the coding device of the first exemplary embodiment is provided with identical elements to the shaft 14 of the key 12 of the first exemplary embodiment. It is therefore also provided with longitudinal grooves 22, 23 with flat bottoms 24, 25 and side walls 26, 27 and 28, 29.

-4GB 302949 B6

Also, the flat bottoms 24, 25 in the longitudinal grooves 22, 23 of the shank 42 of the blank 43 are, according to the first exemplary embodiment, provided with corresponding additional grooves 30, 31 which correspond in shape and dimension and also to their respective longitudinal ribs 19, 20 formed on the guide surfaces 18. guide rails 15.

The shank 42 of the key blank 12 of the first exemplary embodiment is also provided with identical side protrusions 32, 33, 34, 35, longitudinal edges 36, 37, and functional surfaces 38, 39, and 40. 41 and is also, like the shank 14 of the key 12, from its central region towards its longitudinal passages 36, 37 in its full profile, so that its functional surfaces 38, 39 and 40, 41, in accordance with the shaft 14 of the key 12, are open in a V-shape.

In other words, the shank 42 of the key blank 43 of the first exemplary embodiment is identical in shape and dimension to the shank 14 of the key 12 of the first exemplary embodiment to be made therefrom, and differs from the shank 14 of the key 12 only in that It does not include coding projections 21 for interacting with conventional tumblers in a cylinder lock.

From the shank 42 of the key blank 43, a key shank 14 can be made by removing excess material to form a conventional set of coding lugs 21.

The coding device according to the second exemplary embodiment of the invention (Fig. 11) differs from the first exemplary embodiment only in that the guide surfaces 18 on both guide rails 15 are provided with identical, mirror-inverted longitudinal ribs 44, 45 which are located at the edges of the guide surfaces 18. The flat bottoms 24, 25 in the longitudinal grooves 22, 23 of the shank 14 of the key 12 are, according to the second exemplary embodiment, provided with corresponding additional grooves 46, 47 which correspond in shape and dimension and also to their respective longitudinal ribs 44, 45. guide rails. Also, the flat bottoms 24, 25 in the longitudinal grooves 22, 23 of the shaft 42 of the blank 43 for producing the key 12 for the coding device according to the second exemplary embodiment are provided with corresponding additional grooves 46, 47 which correspond to their respective longitudinal ribs 44. 45 provided on the guide surfaces 18 of the guide rails 15 (FIGS. 16, 17).

The coding device according to the third exemplary embodiment (FIG. 13) differs from the first and second exemplary embodiments only in that the guide surfaces 18 on both guide rails 15 are convex in shape.

The flat bottoms 24, 25 in the longitudinal grooves 22, 23 of the key shank 14 of the key 12 are concave according to a third exemplary embodiment, with the shape and dimension corresponding to the shape of the guide surfaces 18 on both guide rails 15.

Also, the flat bottoms 24, 25 in the longitudinal grooves 22, 23 of the shank 42 of the blank 43 for producing the key 12 for the coding device according to the third exemplary embodiment are concave, having a shape and dimension corresponding to the shape of the guide surfaces 18 on both guide rails 15 (FIG. 19).

The coding device according to the invention operates in such a way that when the key shank 14 is inserted into the cylinder lock and the respective longitudinal grooves 22, 23 in the shank 14 of the key 12 approach the respective guide rails 15, at the same time the additional grooves 30, 31, 46. The longitudinal ribs 24, 25 of the longitudinal grooves 22, 23 approach the respective longitudinal ribs 19, 20, 44. 45 on the guide surfaces 18 of the guide rails 15 or the shaped concavities on the flat bottoms 24, 25 of the longitudinal grooves 22, 23 run on the convex guide surfaces 18. If the corresponding longitudinal groove is not formed on the shank 14 of the key 12, which corresponds in shape, dimension and location to the respective longitudinal rib on the guide surface 18, then this longitudinal rib prevents the wrong key shank from entering the cylinder lock. Similarly, if the concave flat bottom 24, 25 does not produce a bulge that is identical in shape and dimension to the convex guide surface 18, then this guide surface 18 will prevent the wrong key shaft from entering the cylinder lock.

-5GB 302949 B6

This shape coding can potentially be overcome by deepening the longitudinal grooves 22, 23. This, however, leads to a weakening of the shank 14 of the key 12, especially in the case of cylindrical small locks, such that the wrong shank of the wrong key in the lock is easily broken. This weakening also leads to an overall shape instability of the key.

Industrial applicability

The rotary key coding device according to the invention can be used in the manufacture of cylindrical locks with rotary keys operating the tumbler tumblers perpendicular to the key with an increased number of locking combinations.

The rotary key blank of the invention can be used to produce a final rotary key for a cylinder lock.

Claims (5)

PATENT CLAIMS Coding device for a cylinder lock with a rotary key (12), comprising a guide element (13) for guiding a shaft (14) of a rotary key (12) inside a cylinder lock with a rotary key (12) and a rotary key (12), the element (13) is formed by two guide bars (15) arranged in parallel and spaced apart, which are interconnected at their ends by a stop bridge (16) and provided with guide surfaces (18) along their entire length, and the shaft (14) of the rotary wrench (12) is provided the conventional coding projections (21) for interacting with the conventional tumblers in said cylinder lock and from its central region towards at least one of its longitudinal edges (36, 37) is continuously expanded in its full cross-section and at least one of the pair of functional surfaces (38, 39 and 40, 41) is open in the shape of a letter "V" and is further provided with two corresponding longitudinal grooves (22, 2) in the central region of its cross-section. 3) characterized in that the longitudinal grooves (22, 23) have flat bottoms (24, 25), a guide surface (18) of at least one of the guide rails (15) and a corresponding flat bottom (24, 25) of the longitudinal groove (22). 23) on the shank (14) of the rotary key (12) are shaped to form the lock code of the cylinder lock. Coding device according to claim 1, characterized in that the guide surface (18) of at least one of the guide bars (15) is provided with one longitudinal rib (19, 20) and a corresponding flat bottom (24, 25) of the longitudinal groove (22). 23) is provided on the shank (14) of the rotary key (12) with one co-operating additional groove (30, 31). Coding device according to claim 1, characterized in that the guide surface (18) of at least one of the guide bars (15) is convex and the corresponding flat bottom (24, 25) of the longitudinal groove (22, 23) on the shaft (14) of the rotatable the key (12) is concave in shape. A rotary key blank (43) for a coding device according to claim 1, comprising a shank (42) which is continuously extended from its central region towards at least one of its longitudinal edges (36, 37) and at least one of the pair of functional surfaces (38, 39 and 40, 41) is open in a V-shape and has two opposing longitudinal grooves (22, 23), (24, 25) in the central region of the foam cross-section of its shaft (42), characterized in that the longitudinal grooves (22, 23) have flat bottoms (24, 25), the flat bottoms (24, 25) of at least one longitudinal groove (22, 23) on the shank (42) of the rotary key blank (43) 1) is provided with one additional groove (30, 31) for interaction with a corresponding longitudinal rib (19, 20) on the guide surface (18) on the guide bar (15) in the cylinder lock. -6GB 302949 B6 A rotary key blank (43) for a coding device according to claim 1, comprising a shaft (42) that is continuously extended from its central region towards at least one of its longitudinal edges (36, 37) and its at least one of a pair of functional surfaces (38, 39 and 40, 41) 5 is open in the shape of a "V" and has two opposing longitudinal grooves (22, 23) in the central cross-sectional area of its shank (42), characterized in that the longitudinal grooves (22, 23) have flat bottoms (24, 23). 25), wherein the flat bottom (24, 25) of the at least one longitudinal groove (22, 23) on the shank (42) of the rotary key blank (43) is concave to interact with a corresponding convex guide surface (18) on the guide polish (24). 15) in a cylinder lock.