Lock-key system with rib interrogation

Abstract

A lock-key system (1) comprising a lock cylinder (2) and a key (3) is proposed, wherein the lock cylinder (2) comprises a cylinder core (22) rotatably mounted in the lock cylinder housing (21) and at least one core pin (221, 222) for scanning a rib (33) of a key (3), and wherein the key (3) has a key profile (31) with a lateral rib (33), and at least one core pin (221) radially movable in the cylinder core (22) is provided to scan the rib (33) and to enable and / or lock rotation of the cylinder core (22).In order to achieve high functional reliability and high copy protection of the key (3), the lateral rib (33) is provided to have an end wall (331) inclined towards the key tip (35), which forms an inclined guide surface and, when the key is inserted, moves the first core pin (221) outwards along this guide surface in order to enable a position query of the core pin (221) via a housing pin (211) in order to finally enable a rotation of the cylinder core (22) and / or to lock it.

Description

[0001] The invention relates to a lock-key system comprising a lock cylinder and a key according to the features of the preamble of claim 1.

[0002] Corresponding locking cylinders are known from practice and are operated by means of keys that have a wedge groove. Corresponding keys or key systems are known from EP 3 872 282 B1.

[0003] The production of such key profiles or blanks with a keyway places high demands on dimensional accuracy and is therefore correspondingly expensive.

[0004] The invention is based on the objective of creating a lock-key system wherein the key is suitable for a locking cylinder which has a device for scanning a keyway. The key should offer a high level of copy protection and yet be cost-effective to manufacture. In particular, the key should be backward compatible with existing lock-key systems.

[0005] This problem is solved according to the invention with a key according to the features of claim 1.

[0006] According to the invention, a lock-key system comprising a lock cylinder and a key is proposed. The lock cylinder has a lock cylinder housing with a cylinder core rotatably mounted therein, wherein the cylinder core comprises a keyway for inserting a key with at least one lateral rib and / or groove and at least one core pin for scanning a rib of the key, and wherein at least one movable housing pin for scanning the key profile and the at least one core pin is arranged in the lock cylinder housing, and the at least one core pin and / or the at least one housing pin allow or prevent rotation of the cylinder core, wherein the key profile forms the at least one lateral rib by having a base surface with a lateral rib rising from it.and wherein at least one first radially movable core pin is arranged in the cylinder core in the area of ​​the key bow in order to scan the lateral rib, such that this first core pin is moved radially outwards when the key is inserted, and wherein the at least one housing pin queries a position of the first core pin (221) at a separating plane (T) between the cylinder core and the lock cylinder housing in order to enable or lock a rotation of the cylinder core (22).

[0007] The essential feature is that the lateral rib has an end wall inclined towards the key tip, which forms an inclined guide surface, so that when the key is inserted the first core pin comes into contact with the end wall of the lateral rib and, as the key is further inserted, slides along the end wall and is moved radially outwards.

[0008] One advantage in manufacturing compared to a conventional keyway is that only one lateral rib is required. Surprisingly, practical experience has shown that this single lateral rib is sufficient to reliably implement the security feature of the interrogation by the core pins in the lock cylinder, just as if the key had a keyway.

[0009] Surprisingly, it has been shown that the key according to the invention is backward compatible and can also be used for locking cylinders with a scanning device for a wedge groove.

[0010] Preferably, the term "base surface" refers to the surface of the key or key blank from which at least one lateral rib rises. In particular, the height of the lateral rib is understood to be the distance from the base surface to the upper surface of the rib. Specifically, the upper surface of the rib runs parallel to the base surface.

[0011] Preferably, a radially movable core pin is understood to be a core pin movably mounted in the cylindrical core and movable in a radial direction of the cylindrical core. In particular, the radially movable core pin is received in a through-bore of the cylindrical core.

[0012] Preferably, the end wall has at least one longitudinal edge that runs at an angle to the longitudinal extent of the lateral rib.

[0013] This improves the guidance of the radially movable core pin, as it is guided outwards over a longer distance. The end wall can also have several longitudinal edges angled relative to the longitudinal extent of the lateral rib. In the case of a single angled longitudinal edge, the end of the end wall can terminate at an acute angle. If there are multiple angled longitudinal edges, the end wall can have sections of variable width and / or sections of constant width.

[0014] Preferably, the at least one angled longitudinal edge can be bent such that the longitudinal edge has at least two sections which form an obtuse angle at their junction. This allows the guide profile of the core pin to be ideally adapted.

[0015] The end wall can form a guide rib that runs at an angle to the lateral rib; in particular, the end wall, when viewed from the key tip, can cover a greater width than the width of the lateral rib. This allows the core pin to be guided over a larger area even with a relatively narrow lateral rib.

[0016] The lateral rib can encompass the end face. Alternatively, the lateral rib can terminate in the end face. During key manufacturing, the end face can be formed by milling away the profile, particularly the profile of the lateral rib.

[0017] Preferably, the lateral rib has an end wall that rests on the base surface across its entire width. This end wall allows a scanning device of a locking cylinder, in the form of a core pin, to be actuated, in particular, pushed radially outwards. The slope of the end wall, or the height of the step formed by the end wall, determines the radial path by which such a core pin is actuated. Because the end wall rests on the base surface across its entire width, the risk of the core pin jamming is reduced.

[0018] Preferably, the end wall, viewed from the direction of the key tip, can form an ascending ramp starting from the flat base. The ascending ramp can serve as a guide surface for the radially movable core pin. In particular, the inclined guide surface of the end wall can have at least two different slopes, especially such that the magnitude of the different slopes increases when viewed from the key tip.

[0019] In particular, the base can be designed to extend over a greater length than the lateral rib and project beyond it towards the key tip. This allows for the creation of an insertion aid for the radially movable core pin and / or an additional safety feature for a second core pin in the area of ​​the key tip.

[0020] In particular, the lateral rib can comprise two areas: the end wall with the chamfered guide surface and the rib with its surface. Preferably, when the key is inserted into the locking channel, the radially movable core pin first slides along the guide surface of the end wall and then along the surface of the lateral rib.

[0021] In particular, the cylinder core can have a second core pin in the area of ​​the key tip to enable the insertion of the key and / or the turning of the cylinder core and / or to lock it. Specifically, the second core pin can be designed to scan the base surface. A free space located in front of the lateral rib can be scanned via the second core pin. This allows for verification of the correct formation of the lateral rib or the end face of the lateral rib.

[0022] In particular, the base surface in the area of ​​the key tip can interact with the first core pin to guide it towards the angled end face. Furthermore, the base surface in the area of ​​the key tip can interact with another core pin to probe the depth of the base surface. This prevents the lock cylinder from being operated by a key with an incorrectly formed lateral rib and end face. This increases the copy protection of the lock-key system. A particular advantage is that the lateral rib does not extend along the entire base surface, but rather has a wide opening in the front area, i.e., in the area of ​​the key tip, to initially come into contact with the first movable core pin, which is then actuated radially outwards by the lateral rib as the key is further inserted.This front section of the base acts as an insertion aid. As the key is inserted further, the base then interacts with the second core pin.

[0023] In one embodiment, the thickness of the key's lateral rib can widen from the key tip to the key bow. Preferably, the thickness of the lateral rib is understood to be the dimension of the rib transverse to the insertion direction. Furthermore, the lateral rib can have a constant height. Preferably, the constant height of the lateral rib keeps the radial position of the movable core pin constant during key insertion. This ensures reliable operation of the cylinder even with tight tolerances. It can also be provided that the lateral rib is inclined relative to the insertion direction of the key, and / or that an edge of the lateral rib and / or an edge of the end face is inclined relative to the insertion direction of the key. This inclination allows for angled guidance of the movable core pin.

[0024] Preferably, the first core pin can have a conical tip. The conical tip enables particularly sensitive rib detection. In particular, when the key is inserted, the first core pin can initially come into contact with the base surface. The conical tip of the first core pin improves functionality by reducing the risk of jamming between the core pin and the key. Together with the inclined end face of the key, the conical tip forms a gently rising sliding surface for the first core pin.

[0025] Preferably, the second core pin can be designed as a radially immovable blocking pin. In particular, radially immovable means that the second core pin is not movable in the radial direction except for a predetermined amount of play. This play of the second core pin allows the key to be inserted into the locking channel without jamming. In particular, it can be ensured that the second core pin does not come into contact with the lateral rib when the key is inserted.

[0026] It may be provided that the radial position of the first core pin is determined by the height of the lateral rib.

[0027] Furthermore, it can be provided that the height of the lateral rib is constant along its length. Preferably, the length of the lateral rib is understood to be the length from the beginning of the lateral rib in the region of the key ring to the beginning of the end facet.

[0028] The key can be manufactured by machining a blank. Preferably, the end face can be produced by milling off the lateral rib. Alternatively, the key can also be manufactured by 3D printing.

[0029] The first core pin is forced radially outwards by the lateral rib. The extent of this displacement depends on the height of the lateral rib. The purpose of this displacement is to ensure that, when the cylinder core rotates, the core pin aligns precisely with the parting line between the cylinder core and the cylinder housing. As the cylinder core rotates, the core pin comes into contact with a housing pin of the cylinder housing to detect the parting line. Only when the first core pin aligns directly with the parting line between the cylinder core and the cylinder housing is it possible to rotate the cylinder core beyond this detection point. If the first core pin is not displaced radially far enough, the housing pin of the cylinder housing will enter the space created by the first core pin, thus preventing rotation of the cylinder core.If the first core pin is displaced too far, it will extend beyond the separating plane, thus preventing the cylinder core from rotating beyond the scanning point.

[0030] The key or lock-key system according to the invention is intended for use in locking systems in buildings with a high security standard.

[0031] Further embodiments of the invention are illustrated in the figures and described below. The figures show: Figs. 1a and 1b: a schematic representation of a key according to the invention; Figs. 2a and 2b: a schematic representation of a further embodiment of a key according to the invention; Fig. 3: a schematic representation of a lock-key system according to the invention; Fig. 4: the scanning principle of the lateral rib; Fig. 5: a section along line AA from Fig. 2Fig. 6: a section through the lock cylinder with the key inserted to illustrate the separation plane when the key is correctly inserted; Fig. 7: an illustration of the separation plane when the key is not correctly inserted.

[0032] The embodiments shown in the figures are merely examples and do not constitute a limitation of the invention. Components with the same function are designated with the same reference symbols in the figures. It is clear to a person skilled in the art that, within the scope defined by the claims, the embodiments shown in the figures can be combined without departing from the inventive concept.

[0033] In the Figures 1a and 1b Figure 1 shows an embodiment of a key 3 for the lock-key system according to the invention, featuring a narrow profile. Figure 1a shows key 3 in a schematic side view. Figure 1bFigure 3 shows the key in a schematic front view. The key 3 has a key bow 34 and a key shaft that terminates in a key tip 35. A key profile 31 is formed on the key shaft. The key profile 31 can be scanned by corresponding housing pins of a locking cylinder.

[0034] As an additional security feature, the key profile 31 includes a rib 33 molded laterally onto the key shaft. A free area of ​​a base surface 32 is arranged in front of the lateral rib 33. The base surface 32 extends beyond the length of the lateral rib 33. The lateral rib 33 can have a wall thickness that widens towards the key bow 34, or, as in the example shown, a constant width. In the area facing the key tip 35, the lateral rib 33 has an inclined end wall 331, or terminates in an inclined end wall 331. The inclined end wall 331 forms an obliquely rising sliding surface or guide surface 332, which interacts with a first core pin 221 of a locking cylinder 2. The end of the end wall 331 facing the key tip 35 tapers at an acute angle.

[0035] The Figures 2a and 2bFigure 1 shows a further embodiment of a key 3 for the lock-key system according to the invention, in which the key profile is designed differently. Figure 2a shows key 3 in a schematic side view. Figure 2b shows the key in a schematic front view. Key 3 corresponds to the one in the Figures 1a and 1b The profile shown includes a key bow 34 and a key shaft that terminates in a key tip 35. A key profile 31 is formed on the key shaft. The key profile 31 can be scanned by corresponding housing pins 211 of a locking cylinder.

[0036] As an additional security feature, the key profile 31 includes a rib 33 molded laterally onto the key shaft. A free area of ​​a base surface 32 is arranged in front of the lateral rib 33. The base surface 32 extends beyond the length of the lateral rib 33. In the area facing the key tip 35, the lateral rib 33 has an inclined end wall 331, or terminates in an inclined end wall 331. The inclined end wall 331 forms a sloping sliding surface or guide surface 332, which interacts with a first core pin 221 of a locking cylinder 2. The longitudinal edge 333 of the guide surface 332 closest to the key tip is inclined relative to the longitudinal extent of the lateral rib. The longitudinal edge 333 has two sections that form an obtuse angle at their abutment. The end wall 331 forms a guide rib that runs at an angle to the lateral rib 33.Viewed from a projection taken from the key tip 35, the end wall or guide rib has a greater width than the width of the lateral rib 33. The end of the end wall 331 facing the key tip 35 terminates in a web. The web is easier to manufacture than the one shown in . Figures 1a and 1b The pointed end shown.

[0037] In the Figure 3 The lock-key system 1 according to the invention is shown. This comprises a locking cylinder 2 and a key 3. The key 3 is inserted into the locking cylinder 2 in order to operate it.

[0038] The locking cylinder 2 has a locking cylinder housing 21 and a rotatable locking cylinder core 22, which can be operated by means of the matching key 3. The locking cylinder 2 has a scanning device for scanning a lateral rib 33 of the key 3. The scanning device comprises a first core pin 221 and a second core pin 222, as shown in Figure 4 depicted.

[0039] In the Figure 4The principle for scanning the lateral rib 33 is illustrated. The lock cylinder 2 has a first core pin 221 and a second core pin 222 in its cylinder core 22. The first core pin 221 interacts with the lateral rib 33. When the key 3 is inserted into the lock cylinder 2, the first core pin 221 initially comes into contact with the end wall 331 of the lateral rib 33. As the key 3 is further inserted, the first core pin 221 is forced radially outwards by the lateral rib 33 and its end wall 331. If the key 3 is inserted further into the lock cylinder 2, the second core pin 222 comes into contact with the base surface 32. With the correct design and dimensions of the lateral rib 33 and the base surface 32, the key 3 can be fully inserted into the lock cylinder 2, and the lock cylinder 2 can be operated by the key 3.If the lateral rib 33 is not correctly dimensioned, for example, if it is too small, rotation of the cylinder core is prevented by a housing pin 211, which is spring-loaded and mounted in the lock cylinder 2. If the depth of the base surface 32 is incorrect, for example, if it is too small, the second core pin 222 acts as a blocking pin and prevents the key 3 from being fully inserted into the lock cylinder 2.

[0040] In the Figure 5 is a sectional view along the section line AA from Figure 2 The section view clearly shows the lock cylinder 2 with lock cylinder housing 21 and rotatable lock cylinder core 22. The correctly locking key 3 is fully inserted into the keyway of the lock cylinder 2, so that its tip 35 has completely passed through the locking channel of the lock cylinder 2. The scanning device of the lock cylinder is shown in the illustration. Fig. 4shown in the lower area and includes the first core pin 221 and the second core pin 222.

[0041] In the presentation of the Figure 5 The first core pin 221 was radially displaced by the lateral rib 33 and is precisely aligned with the separating plane T between the cylinder core 22 and the cylinder housing 21. The separating plane T runs along the boundary between the cylinder core 22 and the cylinder housing 21 and is cylindrical in shape. The base surface 32 was scanned via the second core pin 222 and was found to be correctly dimensioned, allowing the key 3 to be fully inserted into the cylinder 2.

[0042] In the Figure 6Another sectional view shows the key 3 correctly inserted into the lock cylinder 2. The key 3 has a correctly dimensioned lateral rib 33. The sectional view shows that the rib 33 actuates the radially movable first core pin 221 outwards by such an amount that its other end is flush with the dividing plane T between the lock cylinder core 22 and the lock cylinder housing 21. A movable housing pin 211, biased towards the lock cylinder core by a spring 212, is arranged in the lock cylinder housing 21. In the Figure 6 At the scan position shown, the housing pin 211 scans the first core pin 221. Because the first core pin 221 is exactly flush with the parting line T, the housing pin 211 is also exactly at the parting line T, so that rotation of the cylindrical core 22 is possible.

[0043] In the Figure 7A key 3 that does not close correctly is shown. This key 3 lacks the corresponding lateral rib 33. This means that the first core pin 221 is not moved radially, or not sufficiently, so that it does not close flush with the separating plane T. The housing pin 211, which is loaded via the spring 212, therefore extends beyond the separating plane T and thus prevents the rotation of the lock cylinder core 22.

[0044] It is also the one in the Figure 7 An unillustrated case of incorrect locking is conceivable, in which the lateral rib 33 is present but too large, so that the housing pin 211 does not engage in the lock cylinder core, but rather the core pin 221 is displaced too far and extends beyond the parting line into the space of the housing pin 211. This also blocks rotation of the lock cylinder core 22 relative to the lock cylinder housing 21.

[0045] The key according to the invention makes it possible to implement the security feature of a lateral rib scanning in a cost-effective manner, so that a key with a high security standard can be realized at relatively low manufacturing costs. Reference symbol list

[0046] 1 lock and key system 2 Lock cylinder 21 Lock cylinder housing 211 Housing pin 212 Spring 22 Cylinder core 221 First core pin 222 Second core pin 3 Key 31 Key profile 32 Base surface 33 Rib 331 End wall 332 Guide surface 333 Longitudinal edge 34 Key bow 35 Key tip Separation plane

Claims

1. Lock-key system (1) comprising a lock cylinder (2) and a key (3), wherein the lock cylinder (2) has a lock cylinder housing (21) with a cylinder core (22) rotatably mounted therein, wherein the cylinder core (22) comprises a keyway for inserting the key (3) with at least one lateral rib (33) and at least one core pin (221, 222) for scanning the lateral rib (33) of the key (3), and wherein at least one movable housing pin (211) for scanning the key profile (31) and the at least one core pin (221) is arranged in the lock cylinder housing (21), and the at least one core pin (221) and / or the at least one housing pin (211) permit or prevent rotation of the cylinder core (22), wherein the key profile (31) forms the at least one lateral rib (33) by having a base surface (32) with which exhibits an elevating lateral rib (33),and wherein in the cylinder core (22) at least one first radially movable core pin (221) is arranged in the area of ​​the key bow in order to scan the lateral rib (33) such that this first core pin (221) is moved radially outwards when the key (3) is inserted, and wherein the at least one housing pin (211) queries a position of the first core pin (221) at a separating plane (T) between the cylinder core and the lock cylinder housing in order to enable or lock a rotation of the cylinder core (22), , characterized by thatthe lateral rib (33) has an end wall (331) inclined towards the key tip (35), which forms an inclined guide surface, so that when the key (3) is inserted the first core pin (221) first comes into contact with the end wall (331) of the lateral rib (33) and when the key (3) is further inserted the first core pin (221) slides along the end wall (331) and is moved radially outwards, and that the end wall (331) has at least one longitudinal edge (333) which is angled relative to the longitudinal extension of the lateral rib (33).

2. Lock-key system according to claim 1, characterized by that the at least one angled longitudinal edge (333) runs such that the longitudinal edge (333) has at least two sections which form an obtuse angle at their connection.

3. Lock-key system according to one of claims 1 or 2, characterized by thatthe end wall (331) forms a guide rib that runs at an angle to the lateral rib (33), in particular that the end wall (331) covers a greater width in a projection from the key tip (35) than the width of the lateral rib (33).

4. Lock-key system according to one of the preceding claims, characterized by that the end wall (331) forms an ascending ramp from the direction of the key tip (35) on the flat base (32), in particular that the inclined guide surface (332) of the end wall (331) has at least two different slopes, in particular such that the magnitude of the different slopes increases from the key tip (35).

5. Lock-key system according to one of the preceding claims, characterized by thatthe base (32) extends over a greater length than the lateral rib (33) and projects beyond it in the direction of the key tip (35).

6. Lock-key system according to one of the preceding claims, characterized by that the cylinder core (22) in the area of ​​the key tip (35) has a second core pin (222) to enable the insertion of the key (3) and / or the turning of the cylinder core (22) and / or to lock it.

7. Lock-key system according to one of the preceding claims, characterized by that the base surface (32) in the area of ​​the key tip (35) interacts with the first core pin (221) to guide the first core pin (221) in the direction of the inclined end face, and / or that the base surface (32) in the area of ​​the key tip (35) interacts with a further core pin (222) to probe the depth of the base surface (32).

8. Lock-key system according to one of the preceding claims, characterized by that the front wall (331) rests on the base (32) with its entire width.

9. Lock-key system according to one of the preceding claims, characterized by that the thickness of the lateral rib (33) of the key (3) widens from the key tip (35) to the key bow (34), and / or that the lateral rib (33) has a constant height, and / or that the lateral rib (33) is inclined relative to the insertion direction of the key (3), and / or that an edge of the lateral rib (33) and / or that an edge of the end wall (331) is inclined relative to the insertion direction of the key (3).

10. Lock-key system according to one of the preceding claims, characterized by thatthe first core pin (221) has a conical tip, and / or that the first core pin (221) initially comes into contact with the base surface (32) when the key (3) is inserted, in particular that the conical tip of the first core pin (221) initially comes into contact with the base surface (32) when the key (3) is inserted.

11. Lock-key system according to one of claims 6 to 10, characterized by that the second core pin (222) is designed as a radially immovable locking pin, and / or that the second core pin (222) does not come into contact with the lateral rib (33) when the key (3) is inserted.

12. Lock-key system according to one of the preceding claims, characterized by that the radial position of the first core pin (221) is determined by the height of the lateral rib (33).

13. Lock-key system according to one of the preceding claims, characterized by that the height of the lateral rib (33) is constant along its extent.

14. Lock-key system according to one of the preceding claims, characterized by that the end wall (331) is produced by milling off the lateral rib (33).

15. Lock-key system according to one of the preceding claims, characterized by that the upper surface of the rib (33) runs parallel to the base surface.

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