EP4139545A1

EP4139545A1 - Lock system comprising a cylinder lock and a flat key

Info

Publication number: EP4139545A1
Application number: EP21719556.9A
Authority: EP
Inventors: Michael Riesel; Christian Wittmann
Original assignee: EVVA Sicherheitstechnologie GmbH
Current assignee: EVVA Sicherheitstechnologie GmbH
Priority date: 2020-04-20
Filing date: 2021-04-13
Publication date: 2023-03-01
Also published as: WO2021213838A1; AT523793A1; IL297420A

Abstract

The invention relates to a lock system with: a cylinder lock, comprising a cylindrical core (2) rotatably mounted in a housing (12) and having a keyway (20) and core pins (4) that can be moved into the keyway (20), wherein at least one core pin (4) has a engagement extension (5) at the end pointing in the direction of the keyway (20) and extending in the direction of the keyway (20); as well as a flat key (1) for locking the cylinder lock, comprising at least one encoded lateral surface (23) running along a longitudinal extension of the flat key (1) and with control points arranged along the longitudinal extension, wherein at least one milled notch (6) is provided at at least one control point, which is designed for receiving the engagement extension (5) when introducing the flat key (1) into the keyway (20).

Description

Locking system with a cylinder lock and a flat key

The invention relates to a locking system with a cylinder lock and a flat key for locking the cylinder lock.

Locking systems with a cylinder lock and a flat key for locking the cylinder lock are known from the prior art. These systems include cylinder locks with a key channel for receiving a flat key and core pins that can be moved into the key channel. In particular, it is known to shape the core pins of the cylinder lock in such a way that they have a scanning extension at their end pointing in the direction of the key channel, which extends from a base body of the core pin in the direction of the key channel. It is also known to design the scanning extensions of the core pins in such a way that they are narrower than the base body of the core pin and, in particular, are aligned in the longitudinal direction of the key channel.

Matching flat keys comprise a coded side surface running along its longitudinal extent with control points arranged along the longitudinal extent, with an incision milling which also runs in the longitudinal direction being provided at at least one control point.

When the flat key is inserted into the keyway, the scanning extension of the core pin is pressed or pulled in such a way that the core pin releases the parting plane between the cylinder housing and the cylinder core and the key locks the lock. In addition to the depth of the incision milling, it is also known to vary the position of the incision milling transversely to the longitudinal extension of the key channel. As a result, scanning extensions can be provided which are arranged offset to the left or right of the central longitudinal plane of the key channel, so that a further possibility of variation is created. However, there is a need for further possible variations of such locking systems. It is important to ensure that the additional coding on the key is difficult to recognize, especially from the broad side of the key, i.e. that side of the key that is larger, as it can be photographed and thus copied particularly easily.

It is therefore an object of the invention, inter alia, to create a locking system which increases the possibilities for variation of the conventional locking systems and offers increased functional reliability compared to conventional locking systems.

These and other objects are achieved according to the invention by a locking system according to claim 1.

A locking system according to the invention comprises a cylinder lock and at least one flat key for locking the cylinder lock. The cylinder lock comprises a cylinder core rotatably mounted in a housing with a key channel and core pins movable in the key channel. At least one core pin has at its end pointing in the direction of the key channel a scanning extension which extends in the direction of the key channel. The flat key has at least one coded side surface running along the longitudinal extension of the flat key with control points arranged along the longitudinal extension. At least one incision is provided at at least one control point, which is designed to accommodate the scanning extension when the flat key is inserted into the key channel.

According to the invention, the flat key has a recess which is designed to receive a projection of the core pin when the flat key is inserted into the key channel. The features of the locking system are designed according to the invention in such a way that when the flat key is withdrawn from the key channel, the projection is completely removed from the recess. According to the invention it can be provided that the recess is arranged along the transverse extent of the flat key offset to the incision milling. The recess can be designed to receive the projection of the core pin, in particular in a form-fitting manner, the projection extending from the base body of the core pin in the direction of the key channel.

The incision milling of the flat key and the scanning extension of the corresponding core pin can be designed according to the invention in such a way that when the flat key is withdrawn from the key channel, the projection is completely removed from the recess.

According to the invention it can be provided for this purpose that the incision has a guide surface which interacts with a control surface on the scanning extension of the core pin in such a way that when the flat key is removed, the projection is completely moved out of the keyway.

Furthermore, the projection can be designed in such a way that it strikes against a stop of the flat key when the flat key is withdrawn if the projection is not completely moved out of the recess.

The longitudinal extension of the incision, that is, its extension in the longitudinal direction of the flat key, can be greater than the longitudinal extension of the scanning extension, that is, its extension in the longitudinal direction of the key channel.

The shape of the scanning extension can correspond, at least in the area of a control surface, to the shape of the guide surface of the incision milling, so that the scanning extension can be guided along the guide surface. For example, the scanning extension can have a slightly curved or rounded shape in the area of a control surface.

The shape of the projection can essentially correspond to the shape of the recess, so that in the position in which the scanning extension engages completely in the cutout, the projection engages in a form-fitting manner in the recess. The main body of the core pin can preferably be cylindrical, while the scanning extension can in principle be shaped as desired. If necessary, the core pin not only has the scanning extension for engaging in an incision, but also a projection on the base body of the core pin which, however, is set back with respect to the scanning extension.

A special recess can be provided on the key, offset from the incision, for the positive-locking reception of the projection. In order to lock the lock, both the scanning extension and the protrusion of the core pin have to penetrate precisely into the notch or into this special recess, so that the core pin is moved correctly and releases the parting plane of the cylinder lock.

When the key is removed, the scanning extension is lifted out of the notch. In order to prevent blocking in the process, it can be provided that the incision milling has a circular arc-shaped cross section - this often results automatically when the incision milling is made by the milling tool.

The scanning extension of the core pin can protrude beyond the projection by at least that distance by which the projection extends with respect to the base body of the core pin. This ensures that when the key is removed, the core pin is lifted by a sufficient distance so that it is ensured that the projection can leave the recess entirely.

As a result, it is not necessary to also provide the recess with an arcuate cross-section in order to lift the projection out - the recess can therefore also be provided with a right-angled stop. The mutually coordinated shapes of the incision, the scanning extension and the projection on the core pin ensure that the projection is lifted out of the recess via this stop when the key is removed and thus cannot block. If necessary, it can be provided that the base body of the core pin is essentially cylindrical, the scanning extension being narrower than the diameter of the base body and extending therefrom essentially in the axial direction of the base body. As a result, the scanning extension can scan a narrow incision on the key. It can also be provided that the scanning extensions of different core pins are offset from one another in order to scan incision millings which are arranged offset relative to a central longitudinal plane of the key.

The scanning extension can in particular have an essentially rectangular cross section and be oriented in the longitudinal direction of the key channel. The scanning extension can preferably have side surfaces which extend in the axial direction from the base body. In this case, the scanning extension can essentially have the shape of a rectangular web which extends from a cylindrical base body in its axial direction.

The projection can be arranged directly adjacent to the scanning extension in the transverse direction of the key channel. In this case, the transverse direction of the key channel denotes a direction oriented essentially at right angles to the longitudinal extension of the key channel. In this case, the projection is therefore located directly next to the scanning extension at the tip of the base body of the core pin.

However, a groove can also be provided between the scanning extension and the projection. The width of the groove can preferably be greater than or equal to the thickness of the scanning extension. The thickness denotes the extent of the scanning extension in the transverse direction of the key channel.

If necessary, it can be provided that the core pin is pressed into the key channel by a spring force, for example via a spiral spring arranged in the cylinder housing. However, it can also be provided that a ferromagnetic element is provided in the core pin, preferably in the scanning extension. In this case, the core pin can be pulled in the direction of the keyway by a magnetic element in the key. Alternatively, a magnetic element can of course also be arranged in the core pin and a ferromagnetic element in the key.

If necessary, it can be provided that the scanning extension tapers in the direction of the key channel. In particular, it can be provided that the scanning extension has the shape of a claw circle, a flattened isosceles triangle, or an isosceles trapezoid. The scanning extension can have a flattened tip and leg surfaces extending towards the tip.

This ensures that when the key is removed, the scanning extension can slide undisturbed along a correspondingly shaped incision, which has the shape of a segment of a circle, a flattened triangle or a trapezoid, and thus does not block the key's removal movement.

For this purpose, a dedicated control surface can also be arranged on the scanning extension, which is preferably arranged at that point on the scanning extension that is closest to the key channel. The control surface can have an outer rounding which corresponds to the inner rounding of the notch milling.

The projection according to the invention, which is preferably arranged next to the scanning extension, can have an engagement surface. The engagement surface of the projection can be shaped for engagement in the recess of the key. The engagement surface can be arranged essentially parallel to the control surface at the tip of the scanning extension and preferably enclose a right angle with the side surface of the scanning extension. Furthermore, it can be provided that the projection of the core pin has a retaining surface extending obliquely to the key channel, and the stop has a corresponding side wall extending obliquely to the longitudinal insertion of the flat key.

The retaining surface and the side wall can be designed in such a way that the retaining surface strikes the side wall when the flat key is removed if the projection is not completely removed from the recess. The retaining surface and the side wall can be undercut in such a way that the core pin cannot be moved in its axial direction when the flat key is inserted.

The retaining surface can form an angle greater than 0 °, preferably 5 ° to 30 °, particularly preferably 15 °, with the side surface of the scanning extension, and an angle less than 90 °, preferably 60 ° to 85 °, particularly preferably 75 °, with the engagement surface. lock in.

A bevel can be arranged between the retaining surface and the engagement surface in order to facilitate the introduction of the key. When viewed in the axial direction of the base body, the retaining surface can form a flint cut. In conjunction with an undercut flank of the recess on the key, this ensures that the core pin is guided along the retaining surface when the key is inserted and removed and, when the key is inserted, cannot be moved in the recess. This forms another security feature. In particular, this undercut has the advantage that it can only be detected on the key with great effort and effectively prevents the introduction of a key without an undercut. A flat key for such a locking system comprises at least one coded side surface running along the longitudinal extension of the flat key, with control points arranged along the longitudinal extension. At least one incision is provided at at least one control point. The incision milling can have a first depth essentially normal to the side surface. At this control point of the flat key, a recess with a second depth essentially normal to the side surface can be provided, with the notch and the recess being offset from one another, in particular next to one another, transversely to the longitudinal extension of the flat key. If necessary, the second depth is at most half as great as the first depth.

For coding at a control point, such a key therefore not only has an incision milling with a defined depth, but also a recess which is arranged offset in the transverse direction of the key with respect to the incision milling. This results in several possible variations at this control point.

In addition, the recess can be shallower than the incision milling, and not more than half as deep. The core pin, which engages positively in the notch and recess to lock the lock, must leave the notch completely when the key is removed. Since the incision milling is at least twice as deep as the recess, it inevitably results that the core pin leaves the recess when it is completely removed from the incision milling. Since the core pin is completely lifted out of the recess via the notch, the recess can be provided with a steep flank or another form of a stop on which unauthorized keys would get stuck.

The side surface can be a key narrow side of the flat key. However, the side surface can also be a broad side of the flat key. The incision milling can be narrower than the side surface. In particular, it can have an extension of preferably one third of the extension of the side surface transversely to the longitudinal extension of the flat key. Two or more milled incisions can be provided transversely to the longitudinal extension of the flat key.

The incision milling can be curved and preferably designed essentially in the shape of a circular arc and also form an internal circular arc-shaped guide surface. This design allows the core pin to be guided as smoothly as possible along the guide surface when the key is inserted and removed.

The recess does not have to be curved or in the shape of a circular arc, but can have a base area which runs essentially parallel to the side surface. This allows a particularly good form-fitting engagement of an authorized core pin in the recess. A stop can preferably be formed between the side surface and the recess so that an unauthorized core pin blocks when the key is removed. The side surface can also merge into the recess via a stop.

The stop can have a side wall which is arranged at an angle of 60 ° to 90 °, preferably 75 ° to 90 °, particularly preferably 90 °, to the side surface. If the angle is less than 90 °, this offers the advantage according to the invention that an undercut is formed so that a core pin formed with a correspondingly matching undercut can no longer be moved in the axial direction in the inserted state.

If necessary, it can also be provided that at least one ferromagnetic element is provided on the flat key at at least one control point for exerting an attractive force on at least one core pin of the cylinder lock. For this purpose it can be provided that a magnetic element is provided in the core pin. Alternatively, it can be provided that a magnetic element is provided at the control point in the key and a ferromagnetic element is provided in the core pin. This eliminates the need to use a spring element, for example a spiral spring, to pretension the core pin. Further magnetic coding is also possible.

It can be provided that the recess is formed immediately following the cut-out. Alternatively, however, it can also be provided that a web for guiding a core pin of the cylinder lock is provided between the incision and the recess.

Further features according to the invention emerge from the claims, the exemplary embodiments and the figures.

The invention is explained in more detail below using non-limiting exemplary embodiments in Fland.

Fig. 1 shows a schematic three-dimensional representation of a key-lock combination from the prior art.

2 shows a schematic cross-sectional view of a combination of a cylinder lock according to the invention with a conventional flat key.

3 shows a schematic three-dimensional representation of a key-lock combination according to the invention, only the core pin and a detail of the key being shown.

4 shows a schematic three-dimensional representation of a key according to the invention.

5 shows a schematic sectional illustration of a key-lock combination according to the invention.

6a-6e show views of a core pin of a cylinder lock according to the invention.

7a-7c show a schematic three-dimensional representation of a key-lock combination according to the invention, FIG. 7b showing a schematic three-dimensional representation of a key according to the invention and FIGS. 7a and 7c showing the core pin and details of the key. Fig. 8 shows a schematic three-dimensional representation of a further key-lock combination according to the invention.

9 shows a schematic three-dimensional representation of a core pin of a cylinder lock according to the invention.

Fig. 1 initially shows a schematic three-dimensional representation of a key-lock combination from the prior art. The flat key 1 is inserted into the key channel 20 of the cylinder core 2 of a cylinder lock. The cylinder lock comprises, in a known manner, a housing 12 with spring-loaded housing pins 3 and a rotatable cylinder core 2 with core pins 4. Housing pins 3 and core pins 4 are arranged in correspondingly aligned bores in housing 12 and cylinder core 2. The core pins 4 are constructed in such a way that they have a cylindrical base body 19 and then have a web-shaped scanning extension 5 thereon. The scanning extensions 5 are narrower than the diameter of the base body 19 and aligned in the longitudinal direction of the key channel 20.

The flat key 1 has, on its narrow side of the key, at defined control points, milled incisions 6 with different depths. The scanning extensions 5 are designed to scan the milled incisions 6. So that the scanning extensions 5 do not block when the flat key 1 is inserted and withdrawn, the milled incisions 6 have an essentially circular arc-shaped cross section, so that the core pins 4 are guided along the curved base of the respective milled incision 6 to their respective end positions. In the state shown, all housing pins 3 are located on the dividing plane between housing 12 and cylinder core 2, so that cylinder core 2 can be rotated in housing 12 and the lock locks.

2 shows a schematic cross-sectional view of a cylinder lock according to the invention with a conventional flat key 1. The flat key 1 is inserted into the key channel 20 of the cylinder core 2 of a cylinder lock. The cylinder lock comprises, in a known manner, a housing 12 with spring-loaded housing pins 3 and a rotatable cylinder core 2 with core pins 4. The housing pins 3 and core pins 4 are arranged in correspondingly aligned bores in the housing 12 and cylinder core 2. The core pins 4 are constructed in such a way that they have a cylindrical base body 19 and then have a web-shaped scanning extension 5 thereon. The scanning extensions 5 are narrower than the diameter of the base body 19 and aligned in the longitudinal direction of the key channel 20. In addition, one of the core pins 4 has, at its end pointing in the direction of the key channel 20, a projection 9 which extends from the base body 19 of the core pin 4 in the direction of the key channel 20. The scanning extension 5 projects beyond the projection 9 by approximately twice the distance by which the projection 9 extends with respect to the base body 19.

Again, the flat key 1 has on its narrow side of the key at defined control points via cut-outs 6 with different depths, analogous to the flat key 1 from the exemplary embodiment shown in FIG. 1. In the situation shown, however, the core pin 4 with the projection 9 remains hanging on the notch 6 of the flat key 1, since the flat key 1 does not have a correspondingly shaped recess (7) for positively receiving the projection 9. The corresponding housing pin 3 does not release the plane of division and the lock blocks.

3 shows a schematic three-dimensional representation of a key-lock combination according to the invention, only the core pin 4 and a detail of the flat key 1 being shown at a control point. On its narrow side of the key, the flat key 1 has a side surface 23 in which an incision 6 is formed. The notch 6 serves to receive a scanning extension 5 of the core pin 4. The core pin 4 has a cylindrical base body 19 from which the scanning extension 5 extends. A projection 9, which in this exemplary embodiment directly adjoins the scanning extension 5, also extends from the cylindrical base body 19. The projection 9 extends from the base body 19 by approximately one third of the length of the scanning extension 5. A recess 7 is formed on the flat key 1 for the form-fitting reception of the projection 9. The recess 7 is located in the longitudinal extension of the key essentially in the central position relative to the milled incision 6.

The recess 7 merges into the side surface 23 of the flat key 1 via a stop 8 with a steep flank. The notch 6 and the scanning extension 5 are designed in such a way that when the flat key 1 is withdrawn, the projection 9 is completely lifted out of the recess 7.

In particular, the notch 6 has a circular arc-shaped guide surface 11, which interacts with a slightly curved control surface 13 on the scanning extension 5 in such a way that when the flat key 1 is removed, the projection 9 is completely moved out of the recess 7. In the case of unauthorized keys, however, the projection 9 remains hanging on the abrupt flank of the stop 8, so that the key cannot be removed.

FIG. 4 shows a further schematic three-dimensional representation of a key according to the invention, the core pin 4 not being shown this time. The side surface 23 of the narrow side of the key on which the notch 6 is located can be seen.

The width of the notch 6 is approximately 1 the width of the key narrow side. The incision milling 6 has a curved, essentially circular arc-shaped guide surface 11. Immediately adjacent to the incision milling 6 is the recess 7, which merges into the side surface 23 via a specially shaped stop 8. The side wall 24 of the stop 8 is arranged at an angle of approximately 90 ° to the side surface 23.

The recess 7 has a significantly smaller depth x compared to the incision 6. In the present exemplary embodiment, the depth of the recess (7) is approximately 1/3 the depth of the cut-out 6. 5 shows a schematic sectional illustration of a key-lock combination according to the invention, two control points A and B being shown. The cylinder lock comprises a cylinder core 2 rotatable in a housing 12. Housing pins 3 and core pins 4 are provided in aligned bores at defined control points.

A conventional system is shown at the control point B, the housing pin 3 being pressed into the keyway 20 via a spiral spring.

At the control point A, however, no spiral spring is provided. In the flat key 1, a ferromagnetic element 10 is provided at this control point, which interacts with a magnetic element (not shown) in the core pin 4 at this control point. At this control point, the core pin 4 is therefore not pressed into the incision 6 by a spring force, but rather is drawn into the incision 6 by a magnetic force. This results in further possible variations.

At the control point A, the notch 6 has in turn an arcuate guide surface 11 for guiding the scanning extension 5 of the core pin 4.

The core pin 4 in turn has a cylindrical base body 19 from which a projection 9 and the scanning extension 5 extend. It can again be seen that the length of the projection 9 is approximately 1/3 of the length of the scanning extension 5.

6a-6e show views of a core pin 4 of a cylinder lock according to the invention in a three-dimensional representation and in two-dimensional views from four sides. In the views, the cylindrical base body 19 can be seen, from which the scanning extension 5 and the projection 9 extend in the axial direction. The scanning extension 5 has the shape of a web 17 with a rectangular cross-section. As can be seen in FIGS. 6c and 6e, the scanning extension 5 is not located in the middle, but is arranged slightly offset relative to the longitudinal axis of the base body 19. The scanning extension 5 has two side surfaces 22 which extend therefrom in the axial direction of the base body 19. Immediately next to the scanning extension 5 is a projection 9 which also extends from the base body 19 in the axial direction. The scanning extension 5 is, however, much longer, as can be seen in FIG. 6d. Specifically, the scanning extension 5 extends from the base body 19 by a distance y + z, while the projection 9 only extends from the base body 19 by a distance y.

The value of z is about twice as large as the value of y.

In the exemplary embodiment shown, the scanning extension 5 tapers in the direction of the key channel 20, that is to say towards its tip. Specifically, the scanning extension 5 has the shape of an isosceles triangle, flattened at its tip, with side surfaces 14 which enclose an angle of approximately 45 ° with the end surface of the cylindrical base body 19.

At the tip of the scanning extension 5, a control surface 13 is provided which is slightly curved in order to enable the guide surface 11 of the cut 6 to be scanned without blocking. For this purpose, the control surface 13 is also provided with beveled side edges.

For positive engagement in the recess 7 on the key, the projection 9 has a specially shaped engagement surface 21 which is arranged essentially parallel to the control surface 13 and essentially parallel to the end face of the cylindrical base body 19. The engagement surface 21 forms a substantially right angle with the side surface 22 of the scanning extension 5.

Subsequent to the engagement surface 21, a retaining surface 16 is provided which forms an angle a of approximately 15 ° with the side surface 22 of the scanning extension 5 and an angle of approximately 75 ° with the engagement surface 21. A bevel 15 is formed between the retaining surface 16 and the engagement surface 21. In the axial direction of the base body 19, the inclined retaining surface 16 forms a flint cut so that the inserted core pin 4 cannot be removed from the recess 7 in the axial direction. FIGS. 7a and 7c show a schematic three-dimensional representation of a key-lock combination according to the invention, only the core pin 4 and details of the flat key 1 being shown at a control point. On its broad side of the key, the flat key 1 has a side surface 23 in which an incision 6 is formed. The notch 6 serves to receive a scanning extension 5 of the core pin 4.

The core pin 4 has a cylindrical base body 19 from which the scanning extension 5 extends. A projection 9, which in this exemplary embodiment directly adjoins the scanning extension 5, also extends from the cylindrical base body 19.

A recess 7 is formed on the flat key 1 for the form-fitting reception of the projection 9.

FIG. 7b shows a schematic three-dimensional representation of the key from FIG. 7a, the core pin 4 not being shown this time. The side surface 23 of the broad side of the key on which the notch 6 is located can be seen.

The width of the notch 6 is approximately 1/10 of the width of the broad side of the key. The incision milling 6 has a curved, essentially circular arc-shaped guide surface 11. Immediately adjacent to the incision milling 6 is the recess 7, which merges into the side surface 23 via a specially shaped stop 8. The side wall 24 of the stop 8 is arranged at an angle of approximately 90 ° to the side surface 23.

The recess 7 has a significantly smaller depth x compared to the incision 6. In the exemplary embodiment in question, the depth of the recess 7 is approximately 1/3 the depth of the cut-out 6.

Fig. 8 shows a schematic three-dimensional representation of a further key-lock combination according to the invention, again only the core pin 4 of the lock being shown according to the invention. In this exemplary embodiment, the milled incision 6 with the guide surface 11 and the recess 7 on the key are not arranged directly next to one another, but rather a web 17 lying between them is provided. The web 17 serves in particular to guide the core pin 4 of the cylinder lock.

FIG. 9 shows a schematic three-dimensional illustration of the core pin 4 of a cylinder lock according to the invention according to the embodiment of FIG. 7.

On the core pin 4, a groove 18 is provided between the scanning extension 5 and the projection 9, which groove serves to engage in the web 17 described above.

The invention is not limited to the exemplary embodiments shown here, but rather includes all locking systems according to the following patent claims.

The term “incision milling” is not intended to be restricted to recesses in the key that have been produced by a milling tool, but rather includes incisions in the key side that have been produced in any desired way. In particular, the invention is not limited to circular arc-shaped incisions, but includes all incisions that are suitable for moving the corresponding core pin in such a way that a projection located on the core pin is moved over a stop located on the key.

The recess according to the invention can run partially or completely along a side surface of the flat key. An embodiment can therefore also be provided in which the recess runs partially or completely along a side surface of the flat key. In the event that the recess runs completely along a side surface of the flat key, the recess thus forms the side surface of the key.

The first depth of the notch and the second depth of the recess are measured in this embodiment relative to another reference surface, preferably relative to the opposite side surface of the flat key. In the absence of a common reference surface, the feature according to which “the second depth is smaller, preferably a maximum of half as large as the first depth”, is to be understood in this embodiment as meaning that the extension of the recess relative to the other reference surface is greater than the extension of the Notch milling relative to the other reference surface.

If necessary, several recesses can be provided, the second depth of the respective recess determining whether the corresponding core pin can penetrate deeply enough into the cutout of the flat key. The second depth of the recess is preferably adapted to the geometry of the core pin. If, for example, the second depth of a recess is not large enough, the case may arise that the projection of the core pin prevents the scanning attachment from completely penetrating the cutout. List of reference symbols

1 flat key

2 cylinder core

3 housing pin

4 core pin

5 scanning process

6 notch milling

7 recess

8 stop

9 head start

10 Ferromagnetic element

11 guide surface

12 housing

13 Control surface of the scanning extension

14 thigh surface of the scanning process

15 bevel

16 retention surface of the projection

17 bridge

18 groove

19 base body

20 key channel

21 engagement surface of the projection

22 Lateral surface of the scanning extension

23 Side surface of the flat key

24 Side wall of the stop

Claims

1. Locking system with a cylinder lock, comprising a. a cylinder core (2) rotatably mounted in a housing (12) with a key channel (20) and core pins (4) movable into the key channel (20), wherein b. at least one core pin (4) at its end pointing in the direction of the key channel (20) has a scanning extension (5) which extends in the direction of the key channel (20), as well as a flat key (1) for locking the cylinder lock, comprising c. at least one coded side surface (23) running along a longitudinal extension of the flat key (1) with control points arranged along the longitudinal extension, d. At least one notch (6) is provided at at least one control point, which is designed to accommodate the scanning extension (5) when the flat key (1) is inserted into the key channel (20), characterized in that the flat key (1) has a recess (7 ), which is designed to receive a projection (9) of the core pin (4) when the flat key (1) is inserted into the key channel (20), the locking system being designed in such a way that when the flat key (1) is removed from the key channel (20) the projection (9) is completely removed from the recess (7).

2. Locking system according to claim 1, characterized in that the recess (7) is arranged along the transverse extension of the flat key (1) offset to the incision (6).

3. Locking system according to claim 1 or 2, characterized in that the recess (7) of the flat key (1) is designed to, in particular form-fitting, receiving the projection (9), the projection (9) from the base body (19) of the Core pin (4) extends in the direction of the key channel (20).

4. Locking system according to one of claims 1 to 3, characterized in that the incision (6) of the flat key (1) and the scanning extension (5) of the core pin (4) are designed such that when removing the flat key (1) from the Key channel (20) the projection (9) is completely removed from the recess (7).

5. Locking system according to one of claims 1 to 4, characterized in that the notch (6) of the flat key (1) has a guide surface (11) which with a control surface (13) on the scanning extension (5) of the core pin (4) in such a way cooperates that when the flat key (1) is withdrawn, the projection (9) is completely moved out of the recess (7).

6. Locking system according to one of claims 1 to 5, characterized in that the projection (9) of the core pin (4) is designed such that the projection (9) when the flat key (1) is removed against a stop (8) of the flat key (1) strikes when the projection (9) is not completely removed from the recess (7).

7. Locking system according to one of claims 1 to 6, characterized in that the longitudinal extent of the incision milling (6) is greater than the longitudinal extent of the scanning extension (5).

8. Locking system according to one of claims 5 to 7, characterized in that the shape of the scanning extension (5) corresponds to the shape of the guide surface (11) of the incision (6) so that the scanning extension (5) can be guided along the guide surface (11) .

9. Locking system according to one of claims 1 to 8, characterized in that the shape of the projection (9) essentially corresponds to the shape of the recess (7), so that in that position in which the scanning extension (5) is completely in the cutout ( 6) engages, the projection (9) engages positively in the recess (7).

10. Locking system according to one of claims 1 to 9, characterized in that the projection (9) has a retaining surface (16) extending obliquely to the key channel (20) and the stop (8) has a corresponding oblique to the longitudinal insertion of the flat key (1 ) has extending side wall (24).

11. Locking system according to claim 10, characterized in that the retaining surface (16) and the side wall (24) are designed such that the retaining surface (16) strikes the side wall (24) when the flat key (1) is removed when the projection (9) is not completely removed from the recess (7).

12. Locking system according to one of claims 10 or 11, characterized in that the retaining surface (16) and the side wall (24) are undercut in such a way that the core pin (4) cannot be moved in its axial direction in the inserted state of the flat key (1) is.