EP0780529A1 - Lock system - Google Patents
Lock system Download PDFInfo
- Publication number
- EP0780529A1 EP0780529A1 EP96119594A EP96119594A EP0780529A1 EP 0780529 A1 EP0780529 A1 EP 0780529A1 EP 96119594 A EP96119594 A EP 96119594A EP 96119594 A EP96119594 A EP 96119594A EP 0780529 A1 EP0780529 A1 EP 0780529A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lock
- induction coil
- side induction
- key
- lock body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 239000004020 conductor Substances 0.000 claims abstract 2
- 230000006698 induction Effects 0.000 claims description 50
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000005291 magnetic effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 description 4
- 238000013475 authorization Methods 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 3
- 230000036039 immunity Effects 0.000 description 3
- 230000002500 effect on skin Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/22—Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
- G07C2009/00777—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by induction
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00944—Details of construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7051—Using a powered device [e.g., motor]
- Y10T70/7057—Permanent magnet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7051—Using a powered device [e.g., motor]
- Y10T70/7062—Electrical type [e.g., solenoid]
- Y10T70/7068—Actuated after correct combination recognized [e.g., numerical, alphabetical, or magnet[s] pattern]
- Y10T70/7073—Including use of a key
- Y10T70/7079—Key rotated [e.g., Eurocylinder]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/778—Operating elements
- Y10T70/7791—Keys
- Y10T70/7876—Bow or head
Definitions
- the invention relates to a locking system according to the preamble of claim 1.
- Such a locking system is known from DE 42 07 161 A1.
- the locking system described there has a key unit with an induction coil on the key side and a lock unit with an induction coil on the lock side.
- Data can be transmitted as encryption information between the induction coils, the data being transmitted with regard to the activation of a locking device provided in the lock unit.
- the lock-side induction coil is placed on a lock body of the lock unit by means of a coil carrier and, when the key unit is inserted in the lock unit, is in close proximity to the key-side induction coil attached in a key bit of the key unit.
- the area of the lock-side induction coil oriented in the direction of the key-side induction coil is open.
- the interference immunity of the data transmission can consequently be significantly impaired by environmental influences, for example by moisture penetrating to the lock-side induction coil. Due to the induction coils arranged in the immediate vicinity of one another, the outlay and the costs for producing the lock unit are high.
- the quality of the lock-side induction coil and, consequently, the interference immunity of the data transmission after installation of the lock-side Induction coil reduced to the lock body by the material properties of the lock body.
- the reason for this reduction is a ring current which is induced in the lock body by a magnetic field that arises during data transmission. Since the magnetic field is a high-frequency alternating field, this ring current can only flow through a thin layer on the surface of the lock body due to the so-called skin effect.
- the resistance of this layer the thickness of which depends on the depth of penetration of the magnetic field into the lock body, depends on the conductivity and the magnetic permeability of the lock body.
- the thin layer and the lock-side induction coil represent a transformer with the lock-side induction coil as the primary coil and the thin layer as the short-circuited secondary coil, the resistance of this thin layer carrying the ring current to the primary coil, i.e. to the lock-side induction coil, is highly transformed and thus causes an increase in resistance the lock-side induction coil. As a result, the quality of the lock-side induction coil is reduced by mounting the lock-side induction coil on the lock body.
- the invention has for its object to provide a locking system according to the preamble of claim 1, which can be produced inexpensively and with little effort and which enables interference-free data transmission that is not significantly affected by environmental influences.
- the lock unit has a shielding body shielding magnetic fields, which is arranged between the lock-side induction coil and the lock body.
- the lock body is magnetically shielded by the shielding body from the induction coils provided for energy and data transmission, so that a magnetic field arising during data and energy transmission cannot penetrate into the lock body.
- the quality of the lock-side induction coil is independent of the material of the lock body.
- the inductance of the lock-side induction coil is independent of the distance between the lock body and the induction coil on the lock side and consequently regardless of the assembly tolerances that arise when the coil carrier is placed on the lock body.
- the energy transfer and the interference immunity of the data transfer which are dependent on the quality and the inductance of the induction coils, are accordingly improved by the shielding body.
- the shielding body is preferably made of a material with good electrical conductivity, advantageously of a non-ferromagnetic material, for example of copper.
- the locking system can be used wherever, in addition to a mechanical lock, the use of an additional electrical security system or identification system for access authorization or access authorization control is necessary or recommended.
- the invention is described below with reference to an application example from the automotive field. It shows a locking system for operating an ignition device and an electronic immobilizer of a motor vehicle.
- the lock body 1 is designed in a known manner as a lock cylinder with a cylinder core rotatably mounted in a housing and lockable via mechanical tumblers. In order to ensure an inexpensive and difficult to destroy lock, it is made of a ferromagnetic material, for example of steel.
- the lock-side induction coil 11 is placed on the lock body 10 by means of the coil carrier 12 made of a plastic.
- the bobbin 12 has a key opening 14 through which the key bit 20 of the key unit 2 can be inserted into the lock body 10 to unlock the lock unit 1.
- the key-side induction coil 21 of the transponder 23 arranged in the handle part 22 of the key unit 2 is brought near the lock-side induction coil 11.
- An inductive energy and data transmission then takes place between the induction coils 11 and 21.
- the transponder 23 is supplied with energy by the energy transmission and is thereby activated for the transmission of data.
- the transponder 23 can also be activated by data that is transmitted from the lock-side induction coil 11 to the key-side induction coil 21 to send out data.
- the key unit 2 On the basis of the data transmitted from the key-side induction coil 21 to the lock-side induction coil 11, the key unit 2 is identified and, if there is an access authorization for the vehicle, the immobilizer of the vehicle is deactivated.
- the key unit 2 can therefore also be designed as a reversible key.
- the shielding body 13 is arranged between the lock-side induction coil 11 and the lock body 10. It is made of copper, ie of a non-ferromagnetic material with high conductivity. It is provided for shielding the lock body 10 from the lock-side induction coil 11 and thus prevents the magnetic field arising during the energy and data transmission from penetrating into the lock body 10.
- the shielding body 13 is made at least so thick that the magnetic field cannot penetrate it. Since the magnetic field in the present example is an alternating field with a frequency of 125 kHz, and since the depth of penetration of this magnetic field in copper is approximately 0.2 mm, it is therefore thicker than this 0.2 mm.
- a ring current is induced by the magnetic field generated during the energy and data transmission, but because of the skin effect, it flows only through a thin layer on the side of the shielding body 13 facing the lock-side induction coil 11. In the absence of the shielding body 13, this ring current would flow through a thin layer on the surface of the lock body 10.
- the ring current brings about a reduction in the quality of the lock-side induction coil 11, this reduction being greater the greater the resistance of the layer carrying the ring current.
- the magnetic field can penetrate deeper into the shielding body 13 than into the lock body 10 and since the electrical conductivity of the shielding body 13 is also greater than that of the lock body 10, the layer of the shielding body 13 carrying the ring current is lower-ohmic than the corresponding layer of the lock body 10 through which the ring current would flow in the absence of the shielding body 13. Therefore, the quality of the lock-side induction coil is reduced by the ring current that flows in the shielding body 13 to a much lesser extent than by the ring current that would flow in the lock body 10 if there were no shielding body 13. With the shielding body 13, the quality of the lock-side induction coil 11 is accordingly reduced, but this reduction is substantially less than the reduction that is obtained when the coil carrier 12 is mounted on the lock body 10 without the shielding body 13.
- the lock-side induction coil 11 and the shielding body 13 are firmly connected to one another during the manufacture of the coil support 12, advantageously in one work step, for example by injection molding.
- a predeterminable distance for example a distance of approximately 1 mm, can consequently be maintained with high accuracy between the induction coil 11 on the lock side and the shielding body 13. Since the inductance of the lock-side induction coil 11 depends on this distance, the inductances of the induction coils connected in this way to shielding bodies depend only slightly on one another.
- the shielding also reduces the influence of the lock body 10 on the inductance of the lock-side induction coil 11, so that when the coil support 12 is mounted on the lock body 10, no high demands are made on maintaining a certain distance between the lock body 10 and the lock-side induction coil 11 are placed.
- Vehicles with conventional ignition locks can therefore be retrofitted with a lock-side induction coil to control an immobilizer with little design effort and at low cost.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lock And Its Accessories (AREA)
Abstract
Description
Die Erfindung betrifft ein Schließsystem gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a locking system according to the preamble of
Ein derartiges Schließsystem ist aus der DE 42 07 161 A1 bekannt. Das dort beschriebene Schließsystem weist eine Schlüsseleinheit mit einer schlüsselseitigen Induktionsspule und eine Schloßeinheit mit einer schloßseitigen Induktionsspule auf. Zwischen den Induktionsspulen sind Daten als Verschlüsselungsinformationen übertragbar, wobei die Datenübertragung hinsichtlich der Ansteuerung einer in der Schloßeinheit vorgesehenen Verriegelungseinrichtung erfolgt. Die schloßseitige Induktionsspule ist mittels eines Spulenträgers auf einen Schloßkörper der Schloßeinheit aufgesetzt und befindet sich bei in der Schloßeinheit steckender Schlüsseleinheit in unmittelbarer Nähe zu der, in einem Schlüsselbart der Schlüsseleinheit angebrachten, schlüsselseitigen Induktionsspule.Such a locking system is known from DE 42 07 161 A1. The locking system described there has a key unit with an induction coil on the key side and a lock unit with an induction coil on the lock side. Data can be transmitted as encryption information between the induction coils, the data being transmitted with regard to the activation of a locking device provided in the lock unit. The lock-side induction coil is placed on a lock body of the lock unit by means of a coil carrier and, when the key unit is inserted in the lock unit, is in close proximity to the key-side induction coil attached in a key bit of the key unit.
Um die Induktionsspulen einander eng annähern zu können, ist der in Richtung der schlüsselseitigen Induktionsspule ausgerichtete Bereich der schloßseitigen Induktionsspule offen. Die Störsicherheit der Datenübertragung kann demzufolge durch Umwelteinflüsse, beispielsweise durch zur schloßseitigen Induktionsspule eindringende Feuchtigkeit, wesentlich beeinträchtigt werden. Aufgrund der in unmittelbarer Nähe zueinander angeordneten Induktionsspulen sind des weiteren der Aufwand und die Kosten zur Herstellung der Schloßeinheit hoch.In order to be able to bring the induction coils closer together, the area of the lock-side induction coil oriented in the direction of the key-side induction coil is open. The interference immunity of the data transmission can consequently be significantly impaired by environmental influences, for example by moisture penetrating to the lock-side induction coil. Due to the induction coils arranged in the immediate vicinity of one another, the outlay and the costs for producing the lock unit are high.
Außerdem wird die Güte der schloßseitigen Induktionsspule und demzufolge die Störsicherheit der Datenübertragung nach der Montage der schloßseitigen Induktionsspule auf den Schloßkörper durch die Materialeigenschaften des Schloßkörpers reduziert. Ursache dieser Reduzierung ist ein Ringstrom, der durch ein bei der Datenübertragung entstehendes Magnetfeld im Schloßkörper induziert wird. Dieser Ringstrom kann, da das Magnetfeld ein hochfrequentes Wechselfeld ist, aufgrund des sogenannten Skineffekts nur durch eine dünne Schicht an der Oberfläche des Schloßkörpers fließen. Der Widerstand dieser Schicht, deren Dicke von der Eindringtiefe des Magnetfeldes in den Schloßkörper abhängt, ist von der Leitfähigkeit und der magnetischen Permeabilität des Schloßkörpers abhängig. Da die dünne Schicht und die schloßseitige Induktionsspule einen Transformator mit der schloßseitigen Induktionsspule als Primärspule und der dünnen Schicht als kurzgeschlossene Sekundärspule darstellen, wird der Widerstand dieser den Ringstrom führenden dünnen Schicht zur Primärspule, d.h. zur schloßseitigen Induktionsspule, hochtransformiert und bewirkt somit eine Erhöhung des Widerstandes der schloßseitigen Induktionsspule. Demzufolge wird die Güte der schloßseitigen Induktionsspule durch die Montage der schloßseitigen Induktionsspule auf den Schloßkörper reduziert.In addition, the quality of the lock-side induction coil and, consequently, the interference immunity of the data transmission after installation of the lock-side Induction coil reduced to the lock body by the material properties of the lock body. The reason for this reduction is a ring current which is induced in the lock body by a magnetic field that arises during data transmission. Since the magnetic field is a high-frequency alternating field, this ring current can only flow through a thin layer on the surface of the lock body due to the so-called skin effect. The resistance of this layer, the thickness of which depends on the depth of penetration of the magnetic field into the lock body, depends on the conductivity and the magnetic permeability of the lock body. Since the thin layer and the lock-side induction coil represent a transformer with the lock-side induction coil as the primary coil and the thin layer as the short-circuited secondary coil, the resistance of this thin layer carrying the ring current to the primary coil, i.e. to the lock-side induction coil, is highly transformed and thus causes an increase in resistance the lock-side induction coil. As a result, the quality of the lock-side induction coil is reduced by mounting the lock-side induction coil on the lock body.
Der Erfindung liegt die Aufgabe zugrunde, ein Schließsystem gemäß dem Oberbegriff des Patentanspruchs 1 anzugeben, das kostengünstig und mit geringem Aufwand herstellbar ist und das eine störfeste und von Umwelteinflüssen wenig beeinträchtigte Datenübertragung ermöglicht.The invention has for its object to provide a locking system according to the preamble of
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen ergeben sich aus den Unteransprüchen.This object is achieved by the characterizing features of
Erfindungsgemäß weist die Schloßeinheit einen Magnetfelder abschirmenden Abschirmkörper auf, der zwischen der schloßseitigen Induktionsspule und dem Schloßkörper angeordnet ist. Der Schloßkörper wird dabei durch den Abschirmkörper von den zur Energie- und Datenübertragung vorgesehenen Induktionsspulen magnetisch abgeschirmt, so daß ein bei der Daten- und Energieübertragung entstehendes Magnetfeld nicht in den Schloßkörper eindringen kann. Demzufolge ist die Güte der schloßseitigen Induktionsspule unabhängig vom Material des Schloßkörpers. Aus dem gleichen Grunde ist die Induktivität der schloßseitigen Induktionsspule unabhängig vom Abstand zwischen Schloßkörper und schloßseitigen Induktionsspule und demzufolge unabhängig von Montagetoleranzen, die sich beim Aufsetzen des Spulenträgers auf den Schloßkörper ergeben. Die Energieübertragung und die Störfestigkeit der Datenübertragung, die von der Güte und der Induktivität der Induktionsspulen abhängig sind, werden demnach durch den Abschirmkörper verbessert.According to the invention, the lock unit has a shielding body shielding magnetic fields, which is arranged between the lock-side induction coil and the lock body. The lock body is magnetically shielded by the shielding body from the induction coils provided for energy and data transmission, so that a magnetic field arising during data and energy transmission cannot penetrate into the lock body. As a result, the quality of the lock-side induction coil is independent of the material of the lock body. For the same reason, the inductance of the lock-side induction coil is independent of the distance between the lock body and the induction coil on the lock side and consequently regardless of the assembly tolerances that arise when the coil carrier is placed on the lock body. The energy transfer and the interference immunity of the data transfer, which are dependent on the quality and the inductance of the induction coils, are accordingly improved by the shielding body.
Der Abschirmkörper ist vorzugsweise aus einem Material mit guter elektrischer Leitfähigkeit, vorteilhafterweise aus einem nicht-ferromagnetischen Material, beispielsweise aus Kupfer, gefertigt.The shielding body is preferably made of a material with good electrical conductivity, advantageously of a non-ferromagnetic material, for example of copper.
Das Schließsystem läßt sich überall dort einsetzen, wo neben einem mechanischen Schloß der Einsatz eines zusätzlichen elektrischen Sicherungssystems oder Identifikationssystems zur Zugangsberechtigungs- oder Zugriffsberechtigungskontrolle erforderlich oder empfehlenswert ist.The locking system can be used wherever, in addition to a mechanical lock, the use of an additional electrical security system or identification system for access authorization or access authorization control is necessary or recommended.
Die Erfindung wird im folgenden anhand eines Anwendungsbeispiels aus dem Kraftfahrzeugbereich näher beschrieben. Sie zeigt ein Schließsystem zur Bedienung einer Zündeinrichtung und einer elektronischen Wegfahrsperre eines Kraftfahrzeuges.The invention is described below with reference to an application example from the automotive field. It shows a locking system for operating an ignition device and an electronic immobilizer of a motor vehicle.
Der Schloßkörper 1 ist in bekannter Weise als Schließzylinder mit einem in einem Gehäuse drehbar gelagerten und über mechanische Zuhaltungen sperrbaren Zylinderkern ausgeführt. Er ist, um eine kostengünstige und schwer zerstörbare Verriegelung zu gewährleisten, aus einem ferromagnetischen Material, beispielsweise aus Stahl, gefertigt.The
Die schloßseitige Induktionsspule 11 ist mittels des aus einem Kunststoff gefertigten Spulenträgers 12 auf dem Schloßkörper 10 aufgesetzt. Der Spulenträger 12 weist eine Schlüsselöffnung 14 auf, durch die der Schlüsselbart 20 der Schlüsseleinheit 2 zur Entriegelung der Schloßeinheit 1 in den Schloßkörper 10 einführbar ist.The lock-
Durch das Einführen des Schlüsselbartes 20 in den Schloßkörper 10 wird die im Griffteil 22 der Schlüsseleinheit 2 angeordnete schlüsselseitige Induktionsspule 21 des Transponders 23 in die Nähe der schloßseitigen Induktionsspule 11 gebracht. Zwischen den Induktionsspulen 11 und 21 findet dann eine induktive Energie- und Datenübertragung statt. Dabei wird durch die Energleübertragung der Transponder 23 mit Energie versorgt und hierdurch zum Aussenden von Daten aktiviert. Der Transponder 23 kann auch durch Daten, die von der schloßseitigen Induktionsspule 11 zur schlüsselseitigen Induktionsspule 21 übertragen werden, zum Aussenden von Daten aktiviert werden. Anhand der von der schlüsselseitigen Induktionsspule 21 zur schloßseitigen Induktionsspule 11 übertragenen Daten wird die Schlüsseleinheit 2 indentifiziert und, sofern für diese eine Zufgriffsberechtigung für das Fahrzeug existiert, die Wegfahrsperre des Fahrzeuges deaktiviert.By inserting the
Die schloßseitige Induktionsspule 11, die keinen Ferritkern als feldführendes Element aufweist, ist um die Schlüsselöffnung 14 des Spulenträgers 12, d.h. um die Drehachse 15 des Schloßkörpers 10 und der Schlüsseleinheit 2 gewickelt. Daher ist eine Datenübertragung unabhängig von der Position der im Schloßkörper 10 steckenden Schlüsseleinheit 2 möglich. Das heißt die Datenübertragung findet auch dann statt, wenn die Schlüsseleinheit 2 im Schloßkörper 10 gedreht wird. Die Schlüsseleinheit 2 kann demzufolge auch als Wendeschlüssel ausgeführt sein.The lock-
Der Abschirmkörper 13 ist zwischen der schloßseitigen Induktionsspule 11 und dem Schloßkörper 10 angeordnet. Er ist aus Kupfer, d. h. aus einem nicht-ferromagnetischen Material mit hoher Leitfähigkeit gefertigt. Er ist zur Abschirmung des Schloßkörpers 10 gegenüber der schloßseitigen Induktionsspule 11 vorgesehen und verhindert somit, daß das bei der Energie- und Datenübertragung entstehende Magnetfeld in den Schloßkörper 10 eindringt. Der Abschirmkörper 13 ist mindestens so dick ausgeführt, daß das Magnetfeld Ihn nicht durchdringen kann. Er ist, da das Magnetfeld im vorliegenden Beispiel ein Wechselfeld der Frequenz 125 kHz, und da die Eindringtiefe dieses Magnetfeldes in Kupfer ca. 0,2 mm beträgt, demnach dicker als diese 0,2 mm ausgeführt. Er ist außerdem großflächig ausgeführt und bedeckt einen möglichst großen Teil der der schloßseitigen Induktionsspule 11 zugewandten Seite des Schloßkörpers 10. Im vorliegenden Beispiel ist er, um die Abmessungen der Schloßeinheit 1, insbesondere den Abstand zwischen der der Schlüsseleinheit 2 zugewandten Seite des Spulenträgers 12 und des Schloßkörpers 10 möglichst gering zu halten, als ca. 0,5 mm dicke Scheibe 13 ausgeführt. Diese Scheibe 13 weist eine Öffnung auf, durch die der Schlüsselbart 20 der Schlüsseleinheit 2 in den Schloßkörper 10 einführbar ist.The
Im Abschirmkörper 13 wird durch das bei der Energie- und Datenübertragung entstehende Magnetfeld ein Ringstrom induziert, der aufgrund des Skineffekts jedoch nur durch eine dünne Schicht an der der schloßseitigen Induktionsspule 11 zugewandten Seite des Abschirmkörpers 13 fließt. Bei fehlendem Abschirmkörper 13 würde dieser Ringstrom durch eine dünne Schicht an der Oberfläche des Schloßkörpers 10 fließen. Der Ringstrom bewirkt eine Reduzierung der Güte der schloßseitigen Induktionsspule 11, wobei diese Reduzierung um so größer ist, je größer der Widerstand der den Ringstrom führenden Schicht ist. Da aufgrund der verwendeten Materialien das Magnetfeld in den Abschirmkörper 13 tiefer als in den Schloßkörper 10 eindringen kann und da die elektrische Leitfähigkeit des Abschirmkörpers 13 zudem größer als jene des Schloßkörpers 10 ist, ist die den Ringsstrom führende Schicht des Abschirmkörpers 13 niederohmiger als die entsprechende Schicht des Schloßkörpers 10, durch die der Ringstrom bei fehlendem Abschirmkörper 13 fließen würde. Daher wird die Güte der schloßseitigen Induktionsspule durch den Ringstrom, der im Abschirmkörper 13 fließt, in wesentlich geringerem Maße als durch den Ringstrom, der bei fehlendem Abschirmkörper 13 im Schloßkörper 10 fließen würde, reduziert. Mit dem Abschirmkörper 13 wird demnach die Güte der schloßseitigen Induktionsspule 11 reduziert, diese Reduzierung ist jedoch wesentlich geringer als die Reduzierung, die man dann erhält, wenn der Spulenträger 12 ohne Abschirmkörper 13 auf den Schloßkörper 10 montiert wird.In the
Die schloßseitige Induktionsspule 11 und der Abschirmkörper 13 werden während der Herstellung des Spulenträgers 12, vorteilhafterweise in einem Arbeitsschritt, beispielsweise durch Spritzgießen, miteinander fest verbunden. Zwischen der schloßseitigen Induktionsspule 11 und dem Abschirmkörper 13 kann demzufolge ein vorgebbarer Abstand, beispielsweise ein Abstand von etwa 1 mm, mit hoher Genauigkeit eingehalten werden. Da die Induktivität der schloßseitigen Induktionsspule 11 von diesem Abstand abhängt, welchen die Induktivitäten von derartig mit Abschirmkörpern verbundenen Induktionsspulen voneinander nur wenig ab.The lock-
Des weiteren erreicht man durch die Abschirmung auch eine Reduzierung des Einflusses des Schloßkörpers 10 auf die Induktivität der schloßseitigen Induktionsspule 11, so daß bei der Montage des Spulenträgers 12 auf den Schloßkörper 10 keine hohen Anforderungen an die Einhaltung eines bestimmten Abstandes zwischen dem Schloßkörper 10 und der schloßseitigen Induktionsspule 11 gestellt werden.Furthermore, the shielding also reduces the influence of the
Fahrzeuge mit herkömmlichen Zündschlössern lassen sich demnach mit geringem konstruktivem Aufwand und mit geringem Kostenaufwand mit einer schloßseitigen Induktionsspule zur Ansteuerung einer Wegfahrsperre nachrüsten.Vehicles with conventional ignition locks can therefore be retrofitted with a lock-side induction coil to control an immobilizer with little design effort and at low cost.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19548268A DE19548268C2 (en) | 1995-12-22 | 1995-12-22 | Locking system |
| DE19548268 | 1995-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0780529A1 true EP0780529A1 (en) | 1997-06-25 |
Family
ID=7781102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96119594A Withdrawn EP0780529A1 (en) | 1995-12-22 | 1996-12-06 | Lock system |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5735152A (en) |
| EP (1) | EP0780529A1 (en) |
| CN (1) | CN1105221C (en) |
| DE (1) | DE19548268C2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19644308C2 (en) * | 1996-10-24 | 1998-11-12 | Keso Gmbh | Flat key |
| DE19703593A1 (en) * | 1997-01-31 | 1998-08-06 | Gerth Helmut | Device to secure objects with electrical lock esp. for vehicles |
| DE19755093B4 (en) * | 1997-12-11 | 2013-03-28 | Continental Teves Ag & Co. Ohg | Energy receiving connection and release procedure |
| US6374653B1 (en) * | 1997-12-22 | 2002-04-23 | Security People, Inc. | Mechanical/electronic lock and key therefor |
| DE19832516A1 (en) * | 1998-07-20 | 2000-01-27 | Schulte Schlagbaum Ag | Lock, especially for a locking system |
| US6363759B1 (en) * | 1999-10-04 | 2002-04-02 | Apple Computer, Inc. | Rotatable door lock with integrated security feature |
| DE10323402B3 (en) * | 2003-05-23 | 2005-01-05 | Siemens Ag | Access and use authorization system, in particular of a motor vehicle |
| US7181939B2 (en) * | 2004-08-11 | 2007-02-27 | Andersen Michael T | Key assembly |
| FR2909952B1 (en) * | 2006-12-19 | 2009-03-20 | Valeo Securite Habitacle Sas | VEHICLE ANTI-THEFT COMPRISING A EQUIPPED HOUSING AND METHOD OF MAKING SAID HOUSING. |
| DE102008035243B4 (en) * | 2008-07-29 | 2016-12-22 | Continental Automotive Gmbh | Switchgear for a vehicle with an electronic immobilizer and method for actuating an electronic immobilizer |
| CA2922400C (en) | 2013-05-15 | 2019-11-05 | William Denison | Lock |
| CN110084944A (en) * | 2019-05-10 | 2019-08-02 | 怀化学院 | A kind of optic communication intelligent door lock |
| CN112610077A (en) * | 2019-09-18 | 2021-04-06 | 南京南瑞继保电气有限公司 | Wireless radio frequency identification mechanical lock |
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| US3686421A (en) * | 1971-08-30 | 1972-08-22 | Edgar Wunsche | Unitized electride holder and arm for electric arc furnace electrodes or the like |
| US4439699A (en) * | 1982-01-18 | 1984-03-27 | International Business Machines Corporation | Linear moving coil actuator |
| US4453269A (en) * | 1982-09-22 | 1984-06-05 | Chamberlain Manufacturing Corporation | Apparatus for improving the frequency stability of a transmitter oscillator circuit |
| WO1992020091A1 (en) * | 1991-05-02 | 1992-11-12 | Handy & Harman | Electromagnetic interference shielding material |
| DE4207161A1 (en) | 1992-03-06 | 1993-09-09 | Winkhaus Fa August | ELECTRONIC LOCKING CYLINDER |
| EP0628684A1 (en) * | 1993-06-08 | 1994-12-14 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Key operated cylinder device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3118712A1 (en) * | 1981-05-12 | 1982-12-02 | Cyklop International Emil Hoffmann KG, 5000 Köln | DEVICE FOR PUTING AND STRAPPING A STRAP around a PACKAGE |
| JPS5991274A (en) * | 1982-11-16 | 1984-05-25 | 日産自動車株式会社 | Sampling apparatus of cylinder lock |
| JPH0714120B2 (en) * | 1988-02-09 | 1995-02-15 | 大阪府 | Superconducting magnetic shield |
| DE69205750T2 (en) * | 1991-08-02 | 1996-04-04 | Tokai Rika Co Ltd | Lock cylinder and key. |
| JP3282274B2 (en) * | 1993-03-09 | 2002-05-13 | 日産自動車株式会社 | Control device using transceiver |
| DE4317119C2 (en) * | 1993-05-21 | 1996-04-04 | Audi Ag | Anti-theft device as immobilization device on a motor vehicle |
| DE4329315C1 (en) * | 1993-08-31 | 1994-12-08 | Siemens Ag | System for the contactless transmission of data or energy |
| US5551267A (en) * | 1994-04-15 | 1996-09-03 | Briggs & Stratton Corporation | Anti-magnetic tampering system for automobile ignition lock |
| JP2624187B2 (en) * | 1994-08-24 | 1997-06-25 | 日産自動車株式会社 | Key cylinder device for automobile |
-
1995
- 1995-12-22 DE DE19548268A patent/DE19548268C2/en not_active Expired - Fee Related
-
1996
- 1996-11-19 CN CN96121023.0A patent/CN1105221C/en not_active Expired - Fee Related
- 1996-12-06 EP EP96119594A patent/EP0780529A1/en not_active Withdrawn
- 1996-12-20 US US08/770,906 patent/US5735152A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686421A (en) * | 1971-08-30 | 1972-08-22 | Edgar Wunsche | Unitized electride holder and arm for electric arc furnace electrodes or the like |
| US4439699A (en) * | 1982-01-18 | 1984-03-27 | International Business Machines Corporation | Linear moving coil actuator |
| US4453269A (en) * | 1982-09-22 | 1984-06-05 | Chamberlain Manufacturing Corporation | Apparatus for improving the frequency stability of a transmitter oscillator circuit |
| WO1992020091A1 (en) * | 1991-05-02 | 1992-11-12 | Handy & Harman | Electromagnetic interference shielding material |
| DE4207161A1 (en) | 1992-03-06 | 1993-09-09 | Winkhaus Fa August | ELECTRONIC LOCKING CYLINDER |
| EP0628684A1 (en) * | 1993-06-08 | 1994-12-14 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Key operated cylinder device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19548268C2 (en) | 2000-02-17 |
| US5735152A (en) | 1998-04-07 |
| DE19548268A1 (en) | 1997-06-26 |
| CN1105221C (en) | 2003-04-09 |
| CN1153860A (en) | 1997-07-09 |
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