DK1816288T3

DK1816288T3 - Cylinder lock and flat key

Info

Publication number: DK1816288T3
Application number: DK07000587.1T
Authority: DK
Inventors: Walter Baumhauer
Original assignee: Evva Sicherheitstechnologie
Priority date: 2006-02-02
Filing date: 2007-01-12
Publication date: 2017-02-06
Also published as: EP1816288A2; EP1816288A3; AU2007200425B2; AU2007200425A1; RU2404339C2; ES2611590T3; RU2007103932A; GB2475994B; HUE030316T2; DE202006005188U1; GB201102047D0; GB2434827A; FR2896817A3; FR2896817B3; GB0608453D0; PT1816288T; IES20060282A2; AT9157U1; PL1816288T3; LT1816288T

Description

The invention relates to a cylinder lock with a cylinder core and a housing, in which spring-loaded tumbler pins, comprising housing pins and cylinder core pins, are provided for querying milled cuts on the key, wherein the cylinder core pins are formed as scanning protrusions at the end protruding into the key channel, which are narrower than the diameter of the cylinder core pin and which are aligned in longitudinal direction of the key channel. Furthermore the invention relates to a flat key for a cylinder lock, wherein the flat key is preferably configured as a reversible key with two key flat sides and two key narrow sides, and wherein the flat key comprises milled cuts of different depths on at least one key narrow side, preferably on two key narrow sides and, as required, further control surfaces, notches or control tracks on the key flat sides .

Cylinder locks are known, which scan milled cuts or profile grooves. However, an increase of the possible variations of the milled cuts of the profile grooves on the key normally has the effect that construction of the locks becomes increasingly more complicated which is not only disadvantageous for functional safety, but also leads to higher production cost.

Also, as far as the keys are concerned, an increase in possible variations usually brings disadvantages with it, such as higher manufacturing expenditure due to the use of different milling machines / machining of the blank in several steps on different machines, which in turn leads to a substantial increase in cost for the individual key.

The AT 2535 U1 has disclosed a closing cylinder and an associated key according to the preamble of claims 1 respectively 4, in which spring-loaded tumbler pins comprising housing pins and cylinder core pins are provided for querying milled cuts on the key. The cylinder core pins are configured as scanning protrusions at their end protruding into the key channel and these are narrower than the diameter of the cylinder core pins. Exactly two such scanning protrusions are disclosed, which are arranged adjacently to each other on the left and the right of a longitudinal centre plane of the key channel. This has the effect of increasing the number of possible variations during coding of the keys.

It is thus the requirement of the invention to propose a lock which allows more possible variations during coding of the keys, wherein at the same time construction of the lock is kept simple, which leads to increased functional safety and keeps manufacturing cost at a low level. Further it is the requirement of the invention to propose a key, which also offers an increase in the number of possible variations, but at the same time can be manufactured in a simple and low-cost manner and which comprises high locking security.

With a cylinder lock according to the invention this is achieved in that at least two cylinder core pins comprise scanning protrusions which are arranged at different standard distances to a longitudinal centre plane of the key channel and which comprise different widths .

The scanning protrusions may be configured as webs. Due to the unequal arrangement of the scanning protrusions the number of variations of the lock is substantially increased, because it is possible not only to query milled cuts of varying depth, but also because several different standard distances to the longitudinal centre plane are possible. The construction of the lock remains simple because compared to conventional cylinder locks with divided tumbler pins, here only the cylinder core pins are modified.

Furthermore it is a characteristic of the invention for the cylinder core pins to have lateral protrusions which are arranged in respective grooves in the cylinder core, thus preventing the cylinder core pins from twisting.

Further the requirement when using a flat key according to the invention is met in that at least two milled cuts are arranged at different standard distances to a longitudinal centre plane, which have different widths.

At least one of the milled cuts may be laterally covered by two ribs of remaining key material, which makes copying the key more difficult. Another characteristics consists in that at least one milled cut is arranged at a rim of the key narrow side.

In order to ensure a high number of variations as well as high locking security, a further characteristic consists in that at least three, preferably five milled cuts possibly intersecting each other are provided, which differ from each other as regards their standard distance to the longitudinal centre plane.

The milled cuts may comprise a control surface in the form of a section of a circular arc, wherein a further characteristic may consist in that the circular arc sections of the milled cuts all have the same radius. It is thus possible to fabricate the key within a minimum of time and at low cost by using a circular milling cutter with consistent milling radius.

Furthermore longitudinal profile grooves may be provided along the key flat sides, wherein a further feature may consist in that at least two of the longitudinal profile grooves may be arranged so as to overlap each other on opposite key flat sides. This means that the longitudinal profile grooves, as regards their depth, extend at least up to the longitudinal centre plane of the key or even extend beyond the same.

Further features are revealed in the claims, the description as well as the attached drawings.

Fig. 1 shows a side view of a key according to the invention with cylinder core pins arranged thereon. Fig. 2 shows a schematic detail in cross-section through a cylinder core with inserted key. Fig. 3 shows a top view of possible embodiments of cylinder core pins of a cylinder lock according to the invention. Fig. 4 shows a perspective view of the cylinder core pins of fig. 3. Fig. 5 shows a detail cut-out of a flat key according to the invention in a side view. Fig. 6 shows a detail cut-out of the key of fig. 5 in a top view.

The flat key 1 shown in fig. 1 has a key grip 2 as well as a key shaft with two key flat sides 4 and two key narrow sides 3. Cylinder core pins 7 of the cylinder lock are shown arranged on the key 1, which with their scanning protrusions 9 scan the milled cuts 6 on the key narrow side 3. For simplicity's sake, the other components of the lock such as housing, cylinder core with key channel and core bores as well as housing pins and springs are not shown. In order to prevent that scanning protrusions 9 of the cylinder core pins 7, which are arranged- in parallel in longitudinal direction, cannot be twisted in the corresponding core bores, lateral protrusions 8 are provided, which are arranged in corresponding grooves in the cylinder core 10 .

Fig. 2 shows a cross-section through a flat key 1 as well as a schematic detail cross-section through a cylinder 10 of a cylinder lock according to the invention. The surrounding housing is not shown in order to simplify illustration. The milled cuts 6 arranged on the key narrow sides 3 comprise circular arc shaped control surfaces 11. The key flat sides 4 have longitudinal profile grooves 5 arranged on them, of which, as shown in fig. 2, at least two are shown to be overlapping.

Fig. 3 shows possible embodiments for cylinder core pins 7 of a cylinder lock according to the invention in a top view. As shown in this figure the scanning protrusions 9 may be configured as webs 12 of equal or unequal width. The scanning protrusions 9 configured here as webs 12 all have the same width, and the rim-side scanning protrusions 9 in this embodiment are arranged wider. The lateral protrusions 8 which are arranged in corresponding grooves in the cylinder core, prevent a possible twisting of the cylinder core pins 7 in the corresponding core bores. With the example shown three different cylinder core pins 7 are manufactured. They either comprise a web 12 centrally arranged along the longitudinal centre plane, a web laterally offset at a first standard distance to the longitudinal centre plane or a scanning protrusion 9 arranged on the rim-side. The pins with the laterally offset web 12 or with the rim-side scanning protrusion 9 can be inserted into the cylinder core bores in two different directions, thus giving rise to five different possibilities for scanning laterally offset milled cuts.

The widths of the webs 12 or of the scanning protrusions 9 are chosen to have different widths, thereby enabling the number of variations to be further increased. With the embodiment shown in figures 3 and 4 the rim-side scanning protrusion 9 is configured wider than the webs 12, which however is of no importance for the corresponding width of the milled cut 6 in this case, since the corresponding milled cuts 6 are also arranged on the rim of the key flat side 3 and are therefore open towards the respective key flat side 4.

Figures 5 and 6 show a detail view of a flat key according to the invention in a side view and a top view. As shown in fig. 5 the milled cuts 6 comprise a circular arc shaped control surface 11. The chain-dotted lines in the figures indicate other possible control surfaces 11 for the different depths of the milled cuts 6. All these control surfaces 11 show the same radius thus simplifying manufacture due to using the same circular milling cutter.

Fig. 6 shows the key of fig. 5 in a top view, revealing the different lateral arrangements of the milled cuts 6. The milled cuts 6 can either be covered on both sides by webs consisting of remaining key material, thereby making copying the key more difficult and reducing sharp edges on the key narrow sides which could lead to injuries, or they may be arranged on the rim of a key narrow side. Furthermore, individual milled cuts 6 can intersect at those positions not queried by the scanning protrusions 9, which also makes copying the key more difficult.

Claims

A cylinder lock with the cylinder core and housing, in which spring-loaded retaining pins, including housing pins and cylinder core pins, are provided for demand of cutouts located on the narrow side of a flat key, the cylinder core pins (7) being formed at the end projecting into the key channel, such as sensor projections (9), narrower than the diameter of the cylinder core pin (7) and oriented in the longitudinal direction of the key channel, wherein at least two cylinder core pins (7) have sensor projections (9) that are different from each other and are either located in the center along the longitudinal median plane of the key channel or parallel to the left or right thereof, characterized in that the sensor projections (9) are located at different normal distances from the longitudinal median plane and have different widths.

Cylinder lock according to claim 1, characterized in that the sensor projections (9) of the at least two cylinder core pins (7) are formed as ribs which can be placed at different normal distances parallel to the longitudinal median plane or in the middle along the longitudinal median plane.

Cylinder lock according to claim 1 or 2, characterized in that the cylinder core pins (7) have projections (8) on the side, which are arranged in appropriate grooves in the cylinder core, thereby preventing the cylinder core pins from turning.

A flat key for a cylinder lock according to any one of claims 1 to 3, wherein the flat key is preferably designed as a turn key with two key surface sides (4) and two key template sides (3), and wherein the flat key has cutouts (6) at different depths. on at least one key grinding side, preferably on two key grinding sides, and optionally additional guide surfaces, notches or guide rails on the key interface sides, where the notch cutters (6) are narrower than the key grind side (3) and at least two notch cutters (6) which are different from each other are located either in the middle along the longitudinal median plane of the key (1) or parallel to the left or right thereof, characterized in that the at least two notch cutters (6) are located at different normal distances from a longitudinal median plane of the key and have different widths.

Flat key according to claim 4, characterized in that at least one incision cutter (6) is covered in the sides by two ribs of remaining key material.

Flat key according to claim 4 or 5, characterized in that at least one cutter (6) is located on an edge of the key grinding side.

Flat key according to one of Claims 4 to 6, characterized in that at least 3, preferably 5, cut-outs (6) are provided which are different from each other in their normal distance from the longitudinal median plane and possibly intersect.

Flat key according to one of claims 4 to 7, characterized in that the cut-out cutters (6) have a guide surface (11) in the form of a circular arc section.

Flat key according to claim 8, characterized in that the circular arc sections of the incision cutters (6) all have the same radius.

Flat key according to one of claims 4 to 9, characterized in that longitudinal profile grooves (5) are provided along the key surface sides (4).

Flat key according to claim 10, characterized in that at least two of the longitudinal profile grooves (5) are arranged on the opposite key surface sides so that they overlap.