EP2886754B1 - Lock cylinder with magnetic tumbler pin - Google Patents

Description

The invention relates to a closing device with a lock cylinder and a matching key with a cylinder core rotatably mounted in a bearing cavity of a cylinder housing in the keyway extending in the direction of the axis of rotation a one or more coding recesses and a shaft of the key having at least one magnetic zone insertable is, with at least one arranged in a plane passing through the axis of rotation radial plane first core and housing bore in which a displaceable in a direction transverse to the direction of the axis of rotation first core pin or an associated housing pin are mounted, wherein the first core pin by scanning a him associated coding recess can be brought from a blocking position into a release position, and with at least one second core bore, in which a magnetic, by magnetic interaction with the at least one magnetic zone of a blocking position i n a release position can be moved, second core pin is displaced.

Lock cylinder with magnetic pins are known from the DE 10 2006 059 599 A1 and DE 30 16 393 , The magnetic pins cooperate with magnetic zones of the key shaft and are brought by magnetic attraction or magnetic repulsion from a blocking position to a release position. In addition to the magnetic tumbler pins has a lock cylinder and mechanical coding key recesses of the key scanning core pins.

Lock cylinder with arranged in different levels tumbler pins are beyond the DE 43 01 705 A1 and DE 10 220 078 B3 previously known.

Lock cylinder with spring-loaded tumbler pins with beveled faces are from DE 698 18 428 T2 or DE 963 123 previously known.

The DE 698 18 428 T2 describes a locking device with a lock cylinder and a key. The key has an open to the key tip undercut longitudinal groove into which a pin-like end of a pull pin can enter, which can be pulled when inserting the key from a locked position to a release position, wherein the axis of movement of the pull pin passes by the axis of rotation of the cylinder core.

The FR 975 163 describes a lock cylinder with a matching key. The lock cylinder has a complementary magnetic locking, which is formed by a magnetic pin whose axis of movement intersects the axis of rotation of the cylinder core.

The invention has the object of providing a lock cylinder with both mechanical and magnetic tumbler pins useful advantage or manufacturing technology favorable.

The object is achieved by the invention specified in the claims.

The dependent claims form advantageous developments of the main claim. But they also form independent solutions to the task.

First and essentially, it is provided that the core bore, which supports the at least one magnetic core pin, is arranged in a secant plane extending transversely to the radial plane and offset with respect to the axis of rotation. While the mechanically acting core pins move in a direction of displacement that lies in a plane in which the axis of rotation is located, the magnetic tumbler pin moves in a plane of movement that is offset from the axis of rotation. This secant plane does not go through the center of the cylinder core. It is further contemplated that the magnetic tumbler pin has a non-circular cross-section. His face, which lies in the release position in the joint between the wall of the housing bore and the core, extends obliquely to the axis of the magnetic core pin or its core hole.

A locking device according to the invention may have the following advantageous design features. The magnetic core pin overlapping second core hole is closed to the key channel blind hole. The bottom of the second core bore is thus permeable to the magnetic field of the magnetic core pin or the magnetic zone of the key shaft. The bottom of the blind bore forms a thin layer of material that separates the core bore from the keyway. Furthermore, a spring element may be provided be, with the magnetic core pin is acted upon in the direction of its blocking position. In the blocking position, a blocking section adjoining the end face of the magnetic tumbler pin projects into a housing opening. The obliquely extending end face then lies completely in the housing opening. The magnetic core pin is acted upon by a magnetic attraction through the magnetic zone of the key shaft against the restoring force of the spring element in the direction of its release position. The magnetic force is stronger than the spring force, so that the core pin can be brought by magnetic attraction against the restoring force of the spring element in the release position. Furthermore, it can be provided that the magnetic core pin interacts with a second housing pin acted upon in the direction of its blocking position by a prestressed spring element, which can be brought into a release position by magnetic repulsion of the magnetic core pin through the magnet zone against the restoring force of the spring element. While in the variant described above, the two magnets that form the magnetic zone on the one hand and on the other hand, the magnetization of the core pin must be gleichpolpolt, the magnets in this embodiment must be oppositely poled so that the second core pin can be brought into its release position. Again, the magnetic force must be greater than the force of a return spring. The return spring acts in this variant, a second housing pin, which rests in a housing opening. The end face of the second housing pin is acted upon by the end face of the magnetic pin. The axis along which the magnetic tumbler pin can move, in the blocking position of the locking device has an obtuse angle to the axis of the second housing pin. While the axis of the magnetic core pin is in the secant plane, the axis of the cooperating with the magnetic pin housing pin lies in a radial plane. The axis of movement of the second housing pin thus passes through the axis of rotation of the cylinder core. The magnetic core pin may have a reduced diameter portion. This reduced diameter Section may point in the direction of the key channel and have a permanent magnet. The permanent magnet can be stuck with an oriented in the axial direction of the magnetic core pin polar direction in an opening of the core pin. The magnetic zone of the key shank is formed by a permanent magnet whose polar direction runs transversely to the key broadside plane, that is, lies in the plane normal. The magnetic core pin is arranged non-rotatably in its bearing bore. The bearing bore has a non-circular cross-section. A cross-sectional edge initially runs over more than 180 degrees on a circular arc. By forming kink points of the cross-sectional edge forms a bulge. The bulge forms a longitudinal recess, which merges to form an edge in a running on a circular cylinder inner surface wall portion of the second core hole. The core pin has a cross-section which also has an edge portion extending over more than 180 degrees, which runs on a circular arc line. From this edge portion protrudes from a projection which forms a longitudinal rib. The longitudinal rib lies in the longitudinal recess of the wall of the core bore. It is particularly advantageous if the longitudinal rib is flanked on both sides by bulges. The bulges are then opposite the above-mentioned edges, so that a rounded edge of an edge opposite. This avoids tilting of the core pin in the core pin hole. The bulges extend in the radial inward direction of an imaginary circle, in which extends over more than 180 ° extending edge portion. A cooperating with the magnetic pin second housing pin may have a circular interface and rotatably lie in its associated housing bore. A preferred locking device may comprise a plurality of magnetic pins. Each magnetic pin cooperates with a magnetic zone associated with the key shaft. It is provided in particular that the closing device has at least one magnetic pin, which is brought by magnetic repulsion of the magnetic zone in a release position, and at least one further magnetic pin, which can be brought by a magnetic attraction through the magnetic zone of the key shaft in its release position. The housing opening into which the magnetic pin dips in its blocking position or in which there is a second, cooperating with the magnetic pin housing pin can be formed by an insert plate. If the lock cylinder has a plurality of magnetic pins, the insert plate forms a plurality of openings. The openings can be realized as through-holes in the insert plate. The insert plate is preferably inserted in a recess of the wall of the bearing cavity of the cylinder housing, in which the cylinder core is rotatably mounted. The insert plate can be inserted from the end face of the cylinder housing in the recess. The longitudinal edge sides of the recess or the longitudinal edge sides of the insert plate, which extend in the axial direction of the cylinder housing, may extend in the transverse direction thereto in the radial direction, so that a total dovetail-like structure is formed, so that the insert plate is tied in the radial direction. The bottoms of the second housing openings are formed by the bottoms of the recess.

Fig. 1

in einer perspektivischen Darstellung ein erstes Ausführungsbeispiel der Erfindung in Form eines Doppelschließzylinders,

Fig. 2

einen passenden Schlüssel,

Fig. 3

einen Schnitt gemäß der Linie III - III in Figur 1 durch den Schließzylinder zur Verdeutlichung eines mechanischen Zuhaltungsstiftpaares 11, 12 und eines magnetischen Zuhaltungsstiftes 13,

Fig. 4

vergrößert den Abschnitt IV in Figur 3 bei nicht eingestecktem Schlüssel,

Fig. 5

eine Darstellung gemäß Figur 3 jedoch mit eingestecktem passenden Schlüssel,

Fig. 6

den vergrößerten Ausschnitt VI in Figur 6,

Fig. 7

eine Darstellung gemäß Figur 6 jedoch mit einem nicht schließenden Schlüssel,

Fig. 8

einen Schnitt gemäß der Linie VIII - VIII in Figur 5,

Fig. 9

eine Darstellung gemäß Figur 4 eines zweiten Ausführungsbeispiels,

Fig. 10

eine Darstellung gemäß Figur 6 des zweiten Ausführungsbeispiels,

Fig. 11

eine Darstellung gemäß Figur 7 des zweiten Ausführungsbeispiels,

Fig. 12

eine perspektivische Darstellung eines dritten Ausführungsbeispiels der Erfindung, wobei die Wandung der Lagerhöhlung, in der der Zylinderkern 4 angeordnet ist, aufgebrochen dargestellt ist,

Fig. 13

eine Seitenansicht auf den in der Figur 12 dargestellten Schließzylinder,

Fig. 14

den Schnitt gemäß der Linie XIV - XIV in Figur 13 und

Fig. 15

den Schnitt gemäß der Linie XV - XV in Figur 13.

Embodiments of the invention are explained below with reference to accompanying drawings. Show it:

Fig. 1

in a perspective view of a first embodiment of the invention in the form of a double-locking cylinder,

Fig. 2

a matching key,

Fig. 3

a section along the line III - III in FIG. 1 through the lock cylinder to illustrate a mechanical tumbler pin pair 11, 12 and a magnetic tumbler pin 13,

Fig. 4

enlarges section IV in FIG. 3 with not inserted key,

Fig. 5

a representation according to FIG. 3 but with the key inserted,

Fig. 6

the enlarged section VI in FIG. 6 .

Fig. 7

a representation according to FIG. 6 but with a non-closing key,

Fig. 8

a section along the line VIII - VIII in FIG. 5 .

Fig. 9

a representation according to FIG. 4 a second embodiment,

Fig. 10

a representation according to FIG. 6 of the second embodiment,

Fig. 11

a representation according to FIG. 7 of the second embodiment,

Fig. 12

a perspective view of a third embodiment of the invention, wherein the wall of the bearing cavity, in which the cylinder core 4 is arranged, broken away,

Fig. 13

a side view of the in the FIG. 12 illustrated lock cylinder,

Fig. 14

the section according to the line XIV - XIV in FIG. 13 and

Fig. 15

the section according to the line XV - XV in FIG. 13 ,

The drawings show a lock cylinder having a housing 1. The housing 1 has a flange portion in which a plurality of housing bores 10 are arranged. In each of the housing bores 10 is a housing pin 12 which is supported against the bottom of the housing bore 10 with a compression spring 29.

The cylinder housing 1 has a bearing portion which forms a circular cylindrical bearing cavity 3, in which a cylinder core 4 is arranged. The cylinder core is coupled to a closing element with which a lock can be actuated.

The cylinder core 4 is rotatable about a rotation axis D. The rotation axis D is the center axis of the bearing cavity 3.

The cylinder core 4 has a keyway 5 running in the direction of the axis of rotation D, which has coding ribs projecting into the channel. A key 2 has a key shank 7, which has coding recesses 8. With these Codierungsaussparungen 8 core pins 9 of the cylinder core 4 arranged in each case an individual length core pins 11 can be brought into a release position in which the interface between the core pin 11 and associated housing pin 12 is aligned with the parting line between the cylinder core 4 and bearing cavity 3, so that Cylinder core 4 can be rotated. the key shank 7 also has longitudinally extending grooves into which the ribs of the wall of the keyway 5 can engage.

The core holes 9 lie in a row behind each other and in a common radial plane R. The radial plane R is characterized in that the axis of rotation D runs in it. The radial plane R passes through the median plane of the keyway 5, which coincides with the median plane of the key shaft 7, when the key shaft 7 has been inserted into the keyway 5.

In a second core bore 14, a magnetic pin 13 is mounted. The magnetic pin 13 is displaceable in the direction of an axis A. The axis A is the center axis of the core bore 14, which receives the magnetic tumbler pin 13. The displacement axis of the magnetic tumbler pin 13 lies in a secant plane S. The secant plane S does not pass through the axis of rotation D, but intersects the radial plane R, in which the mechanical tumbler pins 11, 12 can move, at a distance from the axis of rotation D. Preferably lies the point of intersection between the secant plane S and the radial plane R is offset by approximately half the radius of the cylinder core 4 from the axis of rotation D, the offset being directed away from the mechanical tumbler pins 11, 12.

The offset can be in a range between ¼ of the radius of the cylinder core 4 and ¾ of the radius of the cylinder core 4.

The magnetic zone 6 in the key shaft 7 is formed by a permanent magnet 6, which rests with its polar axis in the direction of the surface normal of the key broadside in an opening of the key shank.

The core bore 14, in which the magnetic tumbler pin 13 is located, is a blind bore. The blind bore has a closed bottom 16, so that the core bore 14 is spatially separated from the keyway 5. The magnetic field lines of the magnet 6 and a magnet 22 associated with the tumbler pin 13 penetrate the bottom 16 of the core bore 14.

The core pin 13 has a reduced diameter portion which is inserted in a reduced diameter portion of the core hole 14. The front side of the reduced diameter portion has an opening in which the permanent magnet 22 is stuck, which is polarized in the direction of the axis A of the magnetic tumbler pin 13.

At one stage between a larger diameter and a smaller diameter portion of the core bore 14, one end of a helical gear spring is supported. The other end of the helical gear compression spring acts on a step which is formed by a larger diameter portion of the magnetic pin 13. The larger diameter portion of the magnetic core pin 13 has a non-circular cross-section and an end face 15 which extends obliquely. The inclined surface of the end face 15 may be a plane. The oblique face 15 can also be slightly curved.

Immediately to the end face 15 close locking portions 18, 18 ', which are formed by the peripheral wall of the core pin 13.

In the blocking position of the cylinder core 4, the opening of the core bore 14 is opposite a housing opening 19. The locking portion 18, 18 'engages in the locking position of the magnetic tumbler pin 13 in the housing bore 19, wherein one of the two locking portions 18, 18' is formed by a gradation.

The FIG. 8 shows a cross section through the core bore 14 and the magnetic tumbler pin 13 therein. The core bore 14 has a non-circular cross section, so that the core pin 13 can not rotate in the core bore 14. The core bore 14 has a cross section with a cross-sectional edge portion 28 which extends on a circular arc line. In an angular range, the core bore 14 forms a longitudinal recess 26. The longitudinal recess 26 merges with the formation of two edges 27 in the circular arc line 28.

The magnetic core pin 13 has a longitudinal rib 24 which dips into the longitudinal recess 26. The longitudinal rib 24 is flanked by two bulges 25, each of the bulges 25 an edge 27 opposite. The longitudinal rib 24 is free of kinks in the recess 25 on. The recess 25 forms a parallel to the longitudinal rib 24 extending groove with a concave rounded bottom, which merges into a convexly rounded longitudinal rib 24. As a result of this embodiment, an edge 27 faces a kink-free, rounded surface of the magnetic tumbler pin 13. The core pin 13 has a cross section with a rim portion 23 extending on a circular arc line. The recesses 25 extend radially inwardly with respect to this circular arc line. The longitudinal rib 24 extends radially outward relative to this circular arc line.

In the in the FIGS. 5 to 7 shown first embodiment, the magnetic tumbler pin 13 of the spring 17 in the in FIG. 4 shown blocked position, in which the locking portion 18, 18 'rests in the housing bore. The housing bore 19 extends here in the direction of the eccentric axis A. It aligns with the core bore 14, so to speak.

If a matching key inserted into the keyway 5, so that the magnetic zone 6 is opposite to the permanent magnet 22 in the correct polarity, the core pin 13 from the in FIG. 4 illustrated blocking position in the in FIG. 6 drawn release position shown, wherein the spring 17 is tensioned. If the key is pulled out of the keyway 5 again, the magnetic tumbler pin 13 by the relaxing spring 17 in the in FIG. 4 shown blocking position brought.

If a key with a magnetic zone 6, which has a false polarization, inserted into the key channel 5, the result is in FIG. 7 illustrated Operating position. The magnetic tumbler pin 13 is held by the spring 17 and optionally by the force of the repelling magnets 6, 22 in the blocking position.

That in the FIGS. 9 to 11 In the housing opening 19 but there is a housing pin 20. Between the housing pin 20 and the bottom 19 'of the housing opening 19 acts a helical compression spring 21 which acts on the housing pin 20 from the opening 19 in Radialeinwärtsrichtung. The axis B, in which the housing pin 20 can move, intersects the axis of rotation D of the cylinder core 4. The axis B is thus a radial line. The housing pin 20 has a circular cross-section. It is rotationally symmetrical and is rotatable in the housing bore 19 having a circular cross-section.

The magnetic tumbler pin 13 is not cushioned in this embodiment. It is completely displaced by the force of the spring, which acts on the housing pin 20 in the core bore 14 into it and is based on the bottom 16 of the core bore 14 from. The housing pin 20 protrudes partially into the core bore 14 in order to lock the rotatability of the cylinder core 4. He relies on the oblique face 15 of the core pin 13. From the FIG. 10 It can be seen that the displacement axis A of the core pin 13 and the displacement axis B of the associated housing pin 20 intersect at an angle between 30 degrees and 50 degrees.

Is based on the in FIG. 9 shown a correct key inserted into the keyway 5, the permanent magnet 6 of the key shank 7 opposite to the permanent magnet 22 oppositely poled to unfold a repellent effect through the partition 16 between the keyway 5 and core bore 14. By the magnetic force is the core pin 13 in the in FIG. 10 brought release position shown in the housing pin 22 is completely displaced in its housing 19, wherein the pressure spring 21 acting on it is tensioned. In this position, the cylinder core can be rotated. The FIG. 11 shows the effect of a non-closing, inserted in the keyway 5 key. The magnets 6, 22 are now poled in the same direction, so that they attract. The core pin 13 remains in its blocking position, in which the housing pin 20 partially enters the core bore 14.

The FIGS. 12 to 15 show a second embodiment of the invention. The cylinder lock cylinder 4 has a cylinder housing 1 with a bearing cavity for supporting a cylinder core 4. The cylinder core 4 has a plurality of substantially parallel to each other, in the axial direction one behind the other core holes 14, in each of which a magnetic tumbler pin 13 is inserted, as described above , The lock cylinder has at least one magnetic core pin 13, which can be brought into its release position by a repulsive magnetic effect with respect to the magnet zone 6. This magnetic pin 13 is in the FIG. 14 represented and corresponds to its design and its operation in the Her FIGS. 9 to 11 illustrated magnetic pin.

The lock cylinder moreover has at least one magnetic tumbler pin 13, which can be brought into its release position by magnetic attraction by the magnet zone 6. He is in the FIG. 15 represented and corresponds to the structure and its function forth the magnetic pin, the FIGS. 4 to 6 demonstrate.

Unlike the ones in the FIGS. 1 to 11 illustrated embodiments are in the in the FIGS. 12 to 15 illustrated embodiment, the housing openings 19 formed by an insert plate 30. It is about while a curved plate made of hard plastic or metal, which rests in a pocket 31 of the wall of the bearing cavity 3. The facing the axis of rotation wall of the insert plate 30 extends in cross section on a circular arc line and forms a portion of the bearing surface for supporting the cylinder core 4. The opposite side of the insert plate 30 is located at the bottom of the recess 31 at. The insert plate 30 has a plurality of through holes either to the entry of the locking portion of a magnetic attraction in the release position engageable tumbler pin 13 or for receiving a housing pin 20 which is acted upon by a spring element 21 in the reverse direction, wherein the spring element 21 on the bottom of the recess 31 is supported.

The longitudinal sides of the insert plate 30 and the recess 31, which extend in the axial direction of the cylinder core 4, have an extension plane, which is a radial plane. For this reason, the two longitudinal edge sides of the insert plate 30 and the recess 31 extend dovetail-shaped. As a result, the insert plate 30 is tied in the recess 31.

The insert plate 30 can be pushed into the recess 31 from the front end side. This can be done during assembly of the cylinder core 4. <B><u> REFERENCE LIST </ u></b> 1 Lock cylinder housing 24 longitudinal rib 2 key 25 bulge 3 bearing cavity 26 longitudinal recess 4 cylinder core 27 edge 5 keyway 28 wall section 6 magnetic zone 29 feather 7 shaft 30 insert plate 8th coding recess 31 recess 9 core drilling 10 housing bore 11 core pin A axis 12 housing pin B axis 13 magnetic tumbler pin D axis of rotation 14 core drilling R radial plane 15 face S secant 16 ground 17 spring element 18 blocking portion 18 ' blocking portion 19 housing opening 19 ' caseback 20 housing pin 21 spring element 22 permanent magnet 23 edge

Claims (12)

1. Locking device comprising a locking cylinder and a matching key, which device comprises a cylinder core (4) that is mounted in a bearing hole of a cylinder housing (1) so as to be able to rotate about an axis of rotation (D), into the key channel (5) of which core, which channel extends in the direction of the axis of rotation (D), a shaft (7) of the key (2) having one or more coding notches (8) and at least one magnetic zone (6) can be inserted, and comprising at least one first core bore (9) and housing bore (10) arranged in a radial plane (R) extending through the axis of rotation (D), in which bores a first core pin (11) and an associated housing pin (12) are respectively mounted, which pins can be moved in a direction that is transverse to the direction of the axis of rotation (D), it being possible to move the first core pin (11) from a locked position into a release position by making contact with one coding notches associated therewith, and comprising at least one second core bore (14) in which a second, magnetic core pin (13) can be moved, which pin can be moved from a locked position into a release position by means of magnetic interaction with the at least one magnetic zone (6), characterised in that the axis (A) of the second core bore (14) is arranged in a secant plane (S) which extends transversely to the radial plane (R) and is offset relative to the axis of rotation (D), the magnetic core pin (13), which has a non-circular cross section and is inserted in the core bore (14) associated therewith such that it cannot rotate, having an end face (15) that extends obliquely relative to the axis (A) of said pin.
2. Locking device according to claim 1, characterised in that the core bore (14) bearing the magnetic core pin (13) is a blind bore that is closed off from the key channel (5).
3. Locking device according to either of the preceding claims, characterised in that the secant plane (S) is offset, in the direction away from the first core pins (11), from the axis of rotation (D), in particular by approximately ¼ to ¾ of the radius of the cylinder core (4), preferably by half of the radius of the cylinder core (4).
4. Locking device according to any of the preceding claims, characterised by a spring element (17) that acts on the magnetic core pin (13) in the direction of its locked position, it being possible to move the magnetic core pin (13) into the release position, against the restoring force of the spring element (17), by magnetic attraction on account of the magnetic zone (6), and a locking portion (18, 18') of the magnetic core pin (13), which portion is adjacent to the end face (15), projecting into a housing opening (19) in the locked position.
5. Locking device according to any of claims 1 to 3, characterised in that the magnetic core pin (13) cooperates with a second housing pin (20) that is spring-preloaded in the direction of the locked position of said core pin, which housing pin can be moved into a release position, against the restoring force of a spring element (21), by magnetic repulsion on account of the magnetic zone (6).
6. Locking device according to claim 5, characterised in that the second housing pin (20) cooperating with the magnetic core pin (13) is mounted in a second housing bore (19) that extends in a radial direction with respect to the axis of rotation (D) such that the axis (A) of the core bore bearing the magnetic core pin and the axis (B) of the second housing bore (19) are at an obtuse angle to one another.
7. Locking device according to any of the preceding claims, characterised in that the magnetic core pin (13) has a portion of reduced diameter that faces the key channel (5), in which portion a permanent magnet (22) is inserted which is polarised in the direction of the axis of the magnetic core pin, and which cooperates with a permanent magnet that is arranged in the key shaft (7), is polarised transversely to the broad-side plane of the key, and forms the magnetic zone (6).
8. Locking device according to any of the preceding claims, characterised in that in particular one portion of the magnetic core pin (13) has a cross-sectional edge (23) extending over more than 180 degrees and on an arc-of-a-circle line, from which edge a longitudinal rib (24) protrudes.
9. Locking device according to claim 8, characterised in that the longitudinal rib (24) is flanked on both sides by bulges (25).
10. Locking device according to either claim 8 or claim 9, characterised in that the second core bore (14) has a longitudinal recess (26) in which the longitudinal rib (24) is located, the longitudinal recess (26) forming an edge (27) and transitioning into a wall portion (28) of the second core bore (14), which portion extends on a circular-cylinder inner surface.
11. Locking device according to any of claims 4 to 10, characterised by a plurality of magnetic core pins (13), it being possible to move at least one magnetic core pin (13) into the release position, against the restoring force of the spring element (17), by magnetic attraction on account of the magnetic zone (6), and at least one additional magnetic core pin (13) cooperating with a housing pin (20) that is spring-preloaded in the direction of the locked position of said core pin, it being possible to move said housing pin into the release position, against the restoring force of a spring element (21), by magnetic repulsion of the magnetic core pin (13) on account of the magnetic zone (6).
12. Locking device according to any of the preceding claims, characterised in that one or more second housing bores (19), in particular designed as through-bores in an insert plate (30), are arranged in a slot (31) in the wall of the bearing hole (3).

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