EP3664047B1 - Vehicle door handle with sensor device and wireless communication device - Google Patents

Vehicle door handle with sensor device and wireless communication device Download PDF

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Publication number
EP3664047B1
EP3664047B1 EP19210074.1A EP19210074A EP3664047B1 EP 3664047 B1 EP3664047 B1 EP 3664047B1 EP 19210074 A EP19210074 A EP 19210074A EP 3664047 B1 EP3664047 B1 EP 3664047B1
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EP
European Patent Office
Prior art keywords
handle
vehicle door
antenna coil
door handle
inductive sensor
Prior art date
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EP19210074.1A
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German (de)
French (fr)
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EP3664047A1 (en
Inventor
Herr Andreas PESCHL
Herr Hubert BEXTERMÖLLER
Christian Chabrowski
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Huf Huelsbeck and Fuerst GmbH and Co KG
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Huf Huelsbeck and Fuerst GmbH and Co KG
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Publication of EP3664047A1 publication Critical patent/EP3664047A1/en
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Classifications

    • 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
    • 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
    • G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
    • G07C9/00714—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with passive electrical components, e.g. resistor, capacitor, inductor
    • 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
    • G07C2009/00793—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 Hertzian waves
    • 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
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
    • G07C2209/65—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle using means for sensing the user's hand

Definitions

  • the invention relates to a vehicle door handle with sensor electronics, which has at least one inductive sensor. Also accommodated in the vehicle door handle is a transceiver with an antenna coil, which is designed for near-field communication, the antenna coil being designed as an elongated structure.
  • a section of the vehicle door handle is designed as an elongated handle that can be gripped around and in which the sensor electronics and the antenna coil are accommodated.
  • the antenna coil is aligned with its longest extent in the longitudinal direction of the handle.
  • Vehicle door handles that have both sensors and communication devices are known in particular from the field of keyless access systems (keyless entry).
  • the document discloses WO 2015/180942 A1 a sensor device for motor vehicles, in which a multi-layer circuit board is accommodated in a handle of a vehicle door handle. Electrode areas, which are coupled to a control circuit, are formed on different levels of the multi-layer circuit board. In order to be able to realize different detection directions and sensitivities of the detection, the electrodes are controlled with changing functions in time-division multiplex operation, for example at times as a sensor electrode, at times as a reference electrode and at times as a shielding electrode. In this way, a capacitive detection system for approaches by users of the motor vehicle is formed with the sensor device.
  • Another vehicle door handle with sensor electronics according to the prior art is in EP1384844A2 disclosed.
  • the transmitter/receiver devices contained in vehicle door handles with their antenna structures are often designed to emit wake-up and recognition signals for keyless entry systems.
  • antenna systems for the transmission of signals in the range around 125 kHz are known.
  • Transmitting/receiving devices with their antenna structures for near-field communication are also known.
  • the object of the invention is to provide a vehicle door handle with a compact design and inductive sensors for detecting operations and near-field communication devices.
  • the vehicle door handle according to the invention has a conductive shielding electrode in the handle, in the area of the at least one inductive sensor of the sensor electrode, which shielding electrode is assigned to the inductive sensor.
  • This shielding electrode is placed adjacent to the inductive sensor and can be placed as a passive shielding electrode without any potential control at all or permanently coupled to a fixed potential (e.g. vehicle ground).
  • the shielding electrode can also be operated as an active shielding electrode. When the shielding electrode is in active operation, it is coupled to a variable preset potential, for example by connection to a control device which adjusts the preset potential as a function of time or situation.
  • the shielding electrode can be dimensioned to completely cover the be formed inductive sensor, wherein the coverage denotes a projection of the surface of the shielding electrode on the sensor.
  • the inductive sensor detects mechanical actuation of the handle.
  • Inductive sensors detect changes in the position of neighboring conductive components very sensitively and react with changing inductance to changes in the position of the sensor relative to the surrounding metal components. If, for example, the housing of the handle is deformed when the handle is actuated, the position of the surrounding components of the inductive sensor changes, including the shielding electrode, so that the deformation can be detected by the inductive sensor.
  • Commercially available inductive sensors can be used as inductive sensors, and inductive conductor structures can also be formed on printed circuit boards, for example coil-shaped or spiral-shaped conductor structures that form an inductance.
  • the antenna coil of the transceiver is placed according to the invention in such a way that the inductive sensor with the shielding electrode on the one hand and the antenna coil on the other hand completely overlap in a direction in the longitudinal extent of the handle and in a direction transverse to the longitudinal extent of the handle without overlapping are arranged one above the other.
  • the inductive sensor and associated shielding electrode on the one hand and the elongated antenna coil on the other hand are extended over a portion of the longitudinal extension of the handle, but are placed one above the other so that their electromagnetic fields mutually influence each other as little as possible.
  • the components are arranged in overlapping installation spaces in the longitudinal direction of the handle, the installation spaces do not overlap or intersect in a direction transverse thereto.
  • the antenna coil can extend over a wide area of the handle, so that a mobile communication device, for example a smartphone or a key card, can be coupled to the antenna coil located therein for near-field communication in a wide area of the handle when establishing near-field communication.
  • the antenna coil is so narrow that the inductive sensor with the shielding electrode is placed below or above the antenna coil.
  • the inductive sensor with the shielding electrode is therefore arranged outside the area enclosed by the antenna coil. If the inner coil space of the antenna coil is lengthened on both sides, this space includes neither the inductive sensor nor the shielding electrode assigned to the inductive sensor. Accordingly, the field lines of the antenna coil for near-field communication do not run directly through the inductive sensor or the shielding electrode.
  • this can mean an arrangement without overlapping in a direction that runs vertically when finally mounted on the vehicle, provided that the vehicle door handle is mounted with its handle on the vehicle in a horizontal direction.
  • the antenna coil can then be placed in the upper half of the handle and oriented to the outside of the handle, i.e. away from the vehicle, or oriented obliquely upwards to allow easy interaction for a user with a near-field communication device (for example his smartphone).
  • the at least one inductive sensor with the associated shielding electrode is then located in the lower section of the handle, for example in its lower half, in order to detect deformations of the handle when the handle is pulled.
  • the advantage of this configuration is that a large area of the handle can be used as an active area both for near-field communication and for actuation detection by the inductive sensor.
  • the extension along the longitudinal axis of the handle with the simultaneous arrangement of the various inductive functional components one above the other increases comfort and increases operating safety, since a large handle area is available for interaction with the user. At the same time, the mutual influence of the components is minimized as far as possible.
  • the dimension of the cross section of the antenna coil in a direction transverse to its longitudinal extent can take up the entire area which is unaffected by the inductive sensor and the associated shielding electrode.
  • the shielding electrode with the inductive sensor completely overlaps the extension of the antenna coil in the direction of the longitudinal extent of the handle.
  • This design is preferred because a large extension of the antenna coil over the largest possible section of the handle offers a gain in comfort for a user, since he does not have to look for a section of the handle suitable for near-field communication, but rather a means of communication in a larger section of the handle for coupling can arrange. Since at the same time the shielding electrode with the inductive sensor is arranged completely in the area of the longitudinal extent of the antenna coil, a compact design is favored at the same time as the antenna extent can be maximized at the same time.
  • the shielding electrode which is assigned to the at least one inductive sensor, is formed from a flat metal material and is arranged between the inductive sensor and a housing section of the handle.
  • the metallic flat material can be a metal sheet or a metallic foil, which, for example, during assembly is attached to the inside of the housing and follows movements of the housing when a user accesses it, thereby making it detectable for the inductive sensor.
  • the metallic flat material can be mounted potential-free or subjected to a potential control, which may also allow time-varying potentials to influence the function.
  • the shielding electrode is designed as a metallic coating on the inside or outside of the housing of the handle.
  • a metallic coating of the handle for example chrome plating or a partial or complete metallic paint finish, can serve as a shielding electrode and also allow a durable and aesthetic design that is easy to produce.
  • the antenna coil is at least 6 cm, preferably at least 10 cm, in the longitudinal direction of the handle.
  • a vehicle door handle 1 having a handle portion 2 between two attachment portions 3a and 3b.
  • the fastening sections 3a and 3b serve to fix the vehicle door handle on the vehicle, where it is mounted with associated fastening means.
  • such a vehicle door handle can also be fixed on one side or designed as a fixed or retractable vehicle door handle.
  • Figures 2a, 2b and 2c show the vehicle door handle from the Figures 1a and 1b in schematic views to show the components incorporated therein and their location.
  • FIG 2a shows the vehicle door handle in a schematic sectional view from above.
  • Figure 2b the components inside the vehicle door handle 1 are shown in broken lines, while the vehicle door handle is shown from the front.
  • Figure 2c is the representation compared to the Figure 2b changed so that the vehicle door handle is shown in broken lines, while the interior front components are shown in solid lines.
  • circuit board 5 which can also be designed as a multi-layer circuit board, for example, is in this example on the outside (in Figure 2a on the lower side) an antenna coil 6 is formed, which is designed as a printed conductor coil on the circuit board.
  • antenna coil 6 is formed on the back of circuit board 5, i.e. on the side of the circuit board facing the vehicle (in Figure 2a above)
  • a sensor arrangement 7 with inductive sensors (7a, 7b, 7c) is placed on the side of the circuit board facing the vehicle (in Figure 2a above.
  • a shielding electrode 8 made of a flat metal material is placed adjacent to the inductive sensors of the sensor arrangement 7 .
  • the antenna coil 6 spans almost the entire longitudinal section of the handle 2 in order to provide the widest possible coupling range for near-field communication. Nevertheless, it is possible to also accommodate the inductive sensor technology in a cramped space without the electromagnetic fields of the inductive components directly intervening and influencing each other.
  • Figure 3a shows schematically and by way of example how a user 20 with a device 21 for near-field communication, for example a mobile phone capable of NFC communication, reaches the coupling distance from the vehicle door handle 1 and that Device 21 approaches the vehicle door handle and, for example, places it on the vehicle door handle 1 (in the upper area of the handle in the Figures 2b and 2c ).
  • a coupling 22 can be set up and data exchange can be established via the antenna coil 6 .
  • the Figures 3b and 3c show mechanical effects of a user on the vehicle door handle in an exaggerated form, with the deformation of the vehicle door handle 1, in particular of the handle section 2, being shown under mechanical action.
  • a mechanical effect on the vehicle door handle would lead to a change in the position of the shielding electrode 8 relative to the sensor arrangement 7 with the inductive sensors, and thus to a detectable effect on the vehicle door handle.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Lock And Its Accessories (AREA)

Description

Die Erfindung betrifft einen Fahrzeugtürgriff mit einer Sensorelektronik, welche wenigstens einen induktiven Sensor aufweist. Außerdem ist im Fahrzeugtürgriff eine Sende-/Empfangseinrichtung mit einer Antennenspule aufgenommen, die für eine Nahfeldkommunikation ausgebildet ist, wobei die Antennenspule als langgestreckte Struktur ausgebildet ist.The invention relates to a vehicle door handle with sensor electronics, which has at least one inductive sensor. Also accommodated in the vehicle door handle is a transceiver with an antenna coil, which is designed for near-field communication, the antenna coil being designed as an elongated structure.

Ein Abschnitt des Fahrzeugtürgriffes ist als langgestreckte, umgreifbare Handhabe ausgebildet, in welcher die Sensorelektronik und die Antennenspule aufgenommen sind. Dabei ist die Antennenspule mit ihrer längsten Erstreckung in Längsrichtung der Handhabe ausgerichtet.A section of the vehicle door handle is designed as an elongated handle that can be gripped around and in which the sensor electronics and the antenna coil are accommodated. The antenna coil is aligned with its longest extent in the longitudinal direction of the handle.

Fahrzeugtürgriffe, die sowohl Sensoren als auch Kommunikationseinrichtungen aufweisen sind insbesondere aus dem Bereich der schlüssellosen Zugangssysteme (Keyless-Entry) bekannt. So offenbart beispielsweise das Dokument WO 2015/180942 A1 eine Sensoreinrichtung für Kraftfahrzeuge, bei der eine Mehrlagenplatine in einer Handhabe eines Fahrzeugtürgriffes untergebracht ist. Auf verschiedenen Ebenen der Mehrlagenplatine sind Elektrodenbereiche ausgebildet, die mit einer Steuerschaltung gekoppelt sind. Um unterschiedliche Erfassungsrichtungen und Sensitivitäten der Erfassung realisieren zu können, werden die Elektroden mit wechselnden Funktionen im zeitlichen Multiplexbetrieb angesteuert, beispielsweise zeitweise als Sensorelektrode, zeitweise als Referenzelektrode und zeitweise als Schirmelektrode. Auf diese Weise wird mit der Sensoreinrichtung ein kapazitives Erfassungssystem für Annäherungen durch Benutzer des Kraftfahrzeuges gebildet. Ein weiterer Fahrzeugtürgriff mit einer Sensorelektronik nach dem Stand der Technik ist in EP1384844A2 offenbart.Vehicle door handles that have both sensors and communication devices are known in particular from the field of keyless access systems (keyless entry). For example, the document discloses WO 2015/180942 A1 a sensor device for motor vehicles, in which a multi-layer circuit board is accommodated in a handle of a vehicle door handle. Electrode areas, which are coupled to a control circuit, are formed on different levels of the multi-layer circuit board. In order to be able to realize different detection directions and sensitivities of the detection, the electrodes are controlled with changing functions in time-division multiplex operation, for example at times as a sensor electrode, at times as a reference electrode and at times as a shielding electrode. In this way, a capacitive detection system for approaches by users of the motor vehicle is formed with the sensor device. Another vehicle door handle with sensor electronics according to the prior art is in EP1384844A2 disclosed.

Die in Fahrzeugtürgriffen enthaltenen Sende-/Empfangseinrichtungen mit ihren Antennenstrukturen sind häufig zur Aussendung von Weck- und Erkennungssignalen für schlüssellose Zugangssysteme ausgebildet. Beispielsweise sind Antennensysteme für die Aussendungen von Signalen im Bereich um 125 kHz bekannt. Auch Sende-/Empfangseinrichtungen mit ihren Antennenstrukturen für Nahfeldkommunikation sind bekannt.The transmitter/receiver devices contained in vehicle door handles with their antenna structures are often designed to emit wake-up and recognition signals for keyless entry systems. For example, antenna systems for the transmission of signals in the range around 125 kHz are known. Transmitting/receiving devices with their antenna structures for near-field communication are also known.

Die Anordnung mehrerer Funktionskomponenten, insbesondere solcher Funktionskomponenten mit die elektrische und elektromagnetische Felder erzeugen, sind in den engen Bauräumen von Fahrzeugtürgriffen problematisch. Häufig beeinflussen sich die Felder der Funktionskomponenten gegenseitig. Dies kann deren Funktion beeinträchtigen und einer gewünschten kompakten Bauform der Fahrzeugtürgriffe entgegenstehen.The arrangement of several functional components, in particular those functional components that generate electrical and electromagnetic fields, are problematic in the tight installation spaces of vehicle door handles. The fields of the functional components often influence each other. This can impair their function and counteract a desired compact design of the vehicle door handles.

Aufgabe der Erfindung ist es, einen Fahrzeugtürgriff mit kompakter Bauweise und induktiver Sensorik zur Erfassung von Betätigungen sowie Nahfeldkommunikationseinrichtungen bereitzustellen.The object of the invention is to provide a vehicle door handle with a compact design and inductive sensors for detecting operations and near-field communication devices.

Diese Aufgabe wird durch einen Fahrzeugtürgriff mit den Merkmalen des Patentanspruches 1 gelöst.This problem is solved by a vehicle door handle with the features of patent claim 1 .

Der erfindungsgemäße Fahrzeugtürgriff weist in der Handhabe, im Bereich des wenigstens einen induktiven Sensors der Sensorelektrode eine leitfähige Schirmelektrode auf, welche dem induktiven Sensor zugeordnet ist. Diese Schirmelektrode ist benachbart zu dem induktiven Sensor platziert und kann als passive Schirmelektrode gänzlich ohne Potenzialkontrolle platziert sein oder dauerhaft mit einem festen Potenzial gekoppelt sein (z.B. Fahrzeugmasse). Die Schirmelektrode kann auch als aktive Schirmelektrode betrieben werden. Im aktiven Betrieb der Schirmelektrode ist diese mit einer veränderlichen Potenzialvorgabe gekoppelt, beispielsweise durch Verbindung mit einem Steuergerät, welches die Potenzialvorgabe zeitlich oder situationsabhängig veränderlich einstellt. Die Schirmelektrode kann in ihren Abmessungen zur vollständigen Überdeckung des induktiven Sensors ausgebildet sein, wobei die Überdeckung eine Projektion der Fläche der Schirmelektrode auf den Sensor bezeichnet.The vehicle door handle according to the invention has a conductive shielding electrode in the handle, in the area of the at least one inductive sensor of the sensor electrode, which shielding electrode is assigned to the inductive sensor. This shielding electrode is placed adjacent to the inductive sensor and can be placed as a passive shielding electrode without any potential control at all or permanently coupled to a fixed potential (e.g. vehicle ground). The shielding electrode can also be operated as an active shielding electrode. When the shielding electrode is in active operation, it is coupled to a variable preset potential, for example by connection to a control device which adjusts the preset potential as a function of time or situation. The shielding electrode can be dimensioned to completely cover the be formed inductive sensor, wherein the coverage denotes a projection of the surface of the shielding electrode on the sensor.

Der induktive Sensor erfasst mechanische Betätigungen der Handhabe. Induktive Sensoren erfassen Lageveränderungen von benachbarten leitfähigen Komponenten sehr empfindlich und reagieren mit veränderlicher Induktivität auf relative Lageveränderungen des Sensors gegenüber den umgebenden metallischen Komponenten. Wird beispielsweise bei einer Betätigung der Handhabe das Gehäuse der Handhabe verformt, so tritt eine Lageänderung der umgebenen Komponenten des induktiven Sensors auf, damit auch der Schirmelektrode, so dass die Verformung durch den induktiven Sensor erfasst werden kann. Als induktive Sensoren können dabei handelsübliche induktive Sensoren verwendet werden, außerdem können induktive Leiterstrukturen auf Platinen ausgebildet werden, beispielsweise spulenförmige oder spiralförmige Leiterstrukturen, die eine Induktivität bilden.The inductive sensor detects mechanical actuation of the handle. Inductive sensors detect changes in the position of neighboring conductive components very sensitively and react with changing inductance to changes in the position of the sensor relative to the surrounding metal components. If, for example, the housing of the handle is deformed when the handle is actuated, the position of the surrounding components of the inductive sensor changes, including the shielding electrode, so that the deformation can be detected by the inductive sensor. Commercially available inductive sensors can be used as inductive sensors, and inductive conductor structures can also be formed on printed circuit boards, for example coil-shaped or spiral-shaped conductor structures that form an inductance.

Neben dem wenigstens einen induktiven Sensor ist erfindungsgemäß die Antennenspule der Sende-/Empfangseinrichtung so platziert, dass der induktive Sensor mit der Schirmelektrode einerseits und die Antennenspule andererseits in eine Richtung in Längserstreckung der Handhabe vollständig überlappen und in eine Richtung quer zu der Längserstreckung der Handhabe überlappungsfrei übereinander angeordnet sind.In addition to the at least one inductive sensor, the antenna coil of the transceiver is placed according to the invention in such a way that the inductive sensor with the shielding electrode on the one hand and the antenna coil on the other hand completely overlap in a direction in the longitudinal extent of the handle and in a direction transverse to the longitudinal extent of the handle without overlapping are arranged one above the other.

Dies bedeutet, dass der induktive Sensor und die zugeordnete Schirmelektrode einerseits und die langgestreckte Antennenspule andererseits über einen Bereich der Längserstreckung der Handhabe ausgedehnt sind, wobei sie jedoch übereinander platziert sind, so dass sich ihre elektromagnetischen Felder geringstmöglich gegenseitig beeinflussen. Die Komponenten sind zwar in überlappenden Bauräumen in Längsrichtung der Handhabe angeordnet, jedoch ohne, dass sich die Bauräume in einer Richtung quer dazu überlappen oder schneiden. Beispielsweise kann die Antennenspule sich über einen weiten Bereich der Handhabe erstrecken, so dass ein mobiles Kommunikationsgerät, beispielsweise ein Smartphone oder eine Schlüsselkarte, bei Aufbau einer Nahfeldkommunikation in einem weiten Bereich der Handhabe mit der darin befindlichen Antennenspule zur Nahfeldkommunikation gekoppelt werden kann. Die Antennenspule ist dabei jedoch so schmal ausgeführt, dass unter oder über der Antennenspule der induktive Sensor mit der Schirmelektrode platziert ist. Der induktive Sensor mit der Schirmelektrode ist also außerhalb des Bereichs angeordnet, der von der Antennenspule umschlossenen ist. Wird der innere Spulenraum der Antennenspule beidseitig verlängert, so umfasst dieser Raum weder den induktiven Sensor noch die dem induktiven Sensor zugeordnete Schirmelektrode. Entsprechend verlaufen die Feldlinien der Antennenspule für die Nahfeldkommunikation nicht unmittelbar durch den induktiven Sensor oder die Schirmelektrode.This means that the inductive sensor and associated shielding electrode on the one hand and the elongated antenna coil on the other hand are extended over a portion of the longitudinal extension of the handle, but are placed one above the other so that their electromagnetic fields mutually influence each other as little as possible. Although the components are arranged in overlapping installation spaces in the longitudinal direction of the handle, the installation spaces do not overlap or intersect in a direction transverse thereto. For example the antenna coil can extend over a wide area of the handle, so that a mobile communication device, for example a smartphone or a key card, can be coupled to the antenna coil located therein for near-field communication in a wide area of the handle when establishing near-field communication. However, the antenna coil is so narrow that the inductive sensor with the shielding electrode is placed below or above the antenna coil. The inductive sensor with the shielding electrode is therefore arranged outside the area enclosed by the antenna coil. If the inner coil space of the antenna coil is lengthened on both sides, this space includes neither the inductive sensor nor the shielding electrode assigned to the inductive sensor. Accordingly, the field lines of the antenna coil for near-field communication do not run directly through the inductive sensor or the shielding electrode.

Wenn in diesem Kontext von einer Anordnung der Komponenten übereinander die Rede ist, so ist dabei eine Stapelung in einer Richtung quer zur Längserstreckung der Handhabe gemeint. Dies kann insbesondere eine überlappungsfreie Anordnung in einer Richtung bedeuten, die bei endgültiger Montage am Fahrzeug vertikal verläuft, sofern der Fahrzeugtürgriff mit seiner Handhabe am Fahrzeug in horizontaler Richtung montiert ist. Beispielsweise kann die Antennenspule dann in der oberen Hälfte der Handhabe platziert und zur Außenseite der Handhabe, also vom Fahrzeug abgewandt orientiert sein oder schräg nach oben orientiert sein, um eine einfache Wechselwirkung für einen Benutzer mit einem Nahfeldkommunikationsgerät (zum Beispiel seinem Smartphone) zu erlauben. Im unteren Abschnitt der Handhabe, beispielsweise in deren unteren Hälfte, befindet sich dann der wenigstens eine induktive Sensor mit der zugeordneten Schirmelektrode, um Verformungen der Handhabe beim Zug an der Handhabe zu erfassen.If in this context there is talk of an arrangement of the components one above the other, this means stacking in a direction transverse to the longitudinal extension of the handle. In particular, this can mean an arrangement without overlapping in a direction that runs vertically when finally mounted on the vehicle, provided that the vehicle door handle is mounted with its handle on the vehicle in a horizontal direction. For example, the antenna coil can then be placed in the upper half of the handle and oriented to the outside of the handle, i.e. away from the vehicle, or oriented obliquely upwards to allow easy interaction for a user with a near-field communication device (for example his smartphone). The at least one inductive sensor with the associated shielding electrode is then located in the lower section of the handle, for example in its lower half, in order to detect deformations of the handle when the handle is pulled.

Der Vorteil dieser Ausgestaltung liegt darin, dass ein großer Bereich der Handhabe als aktiver Bereich sowohl für die Nahfeldkommunikation als auch für die Betätigungserkennung durch den induktiven Sensor genutzt werden kann. Die Erstreckung entlang der Längsachse der Handhabe bei gleichzeitiger Anordnung der verschiedenen induktiven Funktionskomponenten übereinander erhöht den Komfort und vergrößert die Bediensicherheit, da ein großer Handhabenbereich zur Wechselwirkung mit dem Benutzer zur Verfügung steht. Gleichzeitig wird die gegenseitige Beeinflussung der Komponenten weitestgehend minimiert.The advantage of this configuration is that a large area of the handle can be used as an active area both for near-field communication and for actuation detection by the inductive sensor. The extension along the longitudinal axis of the handle with the simultaneous arrangement of the various inductive functional components one above the other increases comfort and increases operating safety, since a large handle area is available for interaction with the user. At the same time, the mutual influence of the components is minimized as far as possible.

Die Abmessung des Querschnitts der Antennenspule in einer Richtung quer zu ihrer Längserstreckung kann den gesamten Bereich einnehmen, welcher von dem induktiven Sensor und der zugeordneten Schirmelektrode unbeeinflusst ist.The dimension of the cross section of the antenna coil in a direction transverse to its longitudinal extent can take up the entire area which is unaffected by the inductive sensor and the associated shielding electrode.

Erfindungsgemäß überlappt die Schirmelektrode mit induktivem Sensor in der Richtung der Längserstreckung der Handhabe vollständig mit der Erstreckung der Antennenspule.According to the invention, the shielding electrode with the inductive sensor completely overlaps the extension of the antenna coil in the direction of the longitudinal extent of the handle.

Diese Gestaltung ist bevorzugt, da eine große Ausdehnung der Antennenspule über einen möglichst großen Abschnitt der Handhabe einen Komfortgewinn für einen Benutzer bietet, da dieser nicht nach einem zur Nahfeldkommunikation geeigneten Abschnitt der Handhabe suchen muss, sondern ein Kommunikationsmittel in einem größeren Abschnitt der Handhabe zur Kopplung anordnen kann. Da gleichzeitig die Schirmelektrode mit dem induktiven Sensor vollständig im Bereich der Längserstreckung der Antennenspule angeordnet ist, begünstigt gleichzeitig eine kompakte Bauform bei gleichzeitig möglicher Maximierung der Antennenerstreckung.This design is preferred because a large extension of the antenna coil over the largest possible section of the handle offers a gain in comfort for a user, since he does not have to look for a section of the handle suitable for near-field communication, but rather a means of communication in a larger section of the handle for coupling can arrange. Since at the same time the shielding electrode with the inductive sensor is arranged completely in the area of the longitudinal extent of the antenna coil, a compact design is favored at the same time as the antenna extent can be maximized at the same time.

In einer weiter bevorzugten Ausführungsform ist die Schirmelektrode, welche dem wenigstens einen induktiven Sensor zugeordnet ist, aus einem metallischen Flachmaterial gebildet und zwischen dem induktiven Sensor und einem Gehäuseabschnitt der Handhabe angeordnet.In a further preferred embodiment, the shielding electrode, which is assigned to the at least one inductive sensor, is formed from a flat metal material and is arranged between the inductive sensor and a housing section of the handle.

Das metallische Flachmaterial kann ein Blech oder eine metallische Folie sein, welche bei der Montage beispielsweise an der Innenseite des Gehäuses befestigt wird und Bewegungen des Gehäuses bei Zugriff eines Benutzers mitvollzieht und dadurch für den induktiven Sensor detektierbar macht. Wie oben bereits ausgeführt, kann das metallische Flachmaterial potenzialfrei montiert werden oder einer Potenzialkontrolle unterworfen werden, die ggf. auch zeitveränderliche Potenziale zur Funktionsbeeinflussung erlaubt.The metallic flat material can be a metal sheet or a metallic foil, which, for example, during assembly is attached to the inside of the housing and follows movements of the housing when a user accesses it, thereby making it detectable for the inductive sensor. As already explained above, the metallic flat material can be mounted potential-free or subjected to a potential control, which may also allow time-varying potentials to influence the function.

In einer alternativen Gestaltung der Erfindung ist die Schirmelektrode als metallische Beschichtung innen oder außen an dem Gehäuse der Handhabe ausgebildet.In an alternative embodiment of the invention, the shielding electrode is designed as a metallic coating on the inside or outside of the housing of the handle.

Eine metallische Beschichtung der Handhabe, beispielsweise eine Verchromung oder teilweise oder vollständige metallische Lackierung kann als Schirmelektrode dienen und außerdem eine beständige und ästhetische sowie leicht herstellbare Gestaltung erlauben.A metallic coating of the handle, for example chrome plating or a partial or complete metallic paint finish, can serve as a shielding electrode and also allow a durable and aesthetic design that is easy to produce.

Während die konkreten Abmessungen der Anordnung abhängig von den baulichen Anforderungen bei Fahrzeugen sind, ist die Antennenspule in einer bevorzugten Gestaltung der Erfindung in Längsrichtung der Handhabe wenigstens mit einer Größe von 6 cm, vorzugsweise mit einer Größe von wenigstens 10 cm ausgebildet.While the actual dimensions of the arrangement depend on the structural requirements of vehicles, in a preferred embodiment of the invention the antenna coil is at least 6 cm, preferably at least 10 cm, in the longitudinal direction of the handle.

Während es grundsätzlich angestrebt werden sollte, die Antennenspule über einen möglichst großen Abschnitt der Handhabe zu erstrecken, um den Bedienkomfort zu verbessern, ist dies keineswegs zwingend erforderlich. Die Erfindung wird nun anhand der beiliegenden Zeichnungen näher erläutert.

  • Figur 1a zeigt einen erfindungsgemäßen Fahrzeugtürgriff in einer Außenansicht von oben;
  • Figur 1b zeigt den Fahrzeugtürgriff aus Figur 1a von vorne;
  • Figur 2a zeigt eine schematische Schnittansicht des erfindungsgemäßen Fahrzeugtürgriffes von oben;
  • Figur 2b zeigt eine erste schematische teildurchsichtige Ansicht des erfindungsgemäßen Fahrzeugtürgriffes von vorne;
  • Figur 2c zeigt eine zweite schematische teildurchsichtige Darstellung des Fahrzeugtürgriffes von vorne;
  • Figur 3a zeigt das Prinzip einer Nahfeldkommunikation mit dem erfindungsgemäßen Fahrzeugtürgriff;
  • Figur 3b zeigt das Prinzip einer rückseitigen Betätigung zur induktiven Detektion durch einen Benutzer an dem erfindungsgemäßen Fahrzeugtürgriff;
  • Figur 3c zeigt das Prinzip einer frontseitigen Betätigung zur induktiven Detektion durch einen Benutzer an dem erfindungsgemäßen Fahrzeugtürgriff.
While the aim should always be to extend the antenna coil over as large a section of the handle as possible in order to improve ease of use, this is by no means absolutely necessary. The invention will now be explained in more detail with reference to the accompanying drawings.
  • Figure 1a shows a vehicle door handle according to the invention in an external view from above;
  • Figure 1b shows the vehicle door handle Figure 1a from the front;
  • Figure 2a shows a schematic sectional view of the vehicle door handle according to the invention from above;
  • Figure 2b shows a first schematic partially transparent view of the vehicle door handle according to the invention from the front;
  • Figure 2c shows a second schematic, partially transparent representation of the vehicle door handle from the front;
  • Figure 3a shows the principle of near-field communication with the vehicle door handle according to the invention;
  • Figure 3b shows the principle of rear actuation for inductive detection by a user on the vehicle door handle according to the invention;
  • Figure 3c shows the principle of a front actuation for inductive detection by a user on the vehicle door handle according to the invention.

In Figur 1a ist ein Fahrzeugtürgriff 1 gezeigt, der einen Handhabenabschnitt 2 zwischen zwei Befestigungsabschnitten 3a und 3b aufweist. Die Befestigungsabschnitte 3a und 3b dienen zur Festlegung des Fahrzeugtürgriffes am Fahrzeug, wo eine Montage mit zugehörigen Befestigungsmitteln erfolgt. In anderen Ausführungsformen kann ein solcher Fahrzeugtürgriff auch einseitig festgelegt oder als feststehender oder versenkbarer Fahrzeugtürgriff ausgebildet sein.In Figure 1a a vehicle door handle 1 is shown having a handle portion 2 between two attachment portions 3a and 3b. The fastening sections 3a and 3b serve to fix the vehicle door handle on the vehicle, where it is mounted with associated fastening means. In other embodiments, such a vehicle door handle can also be fixed on one side or designed as a fixed or retractable vehicle door handle.

Die Figuren 2a, 2b und 2c zeigen den Fahrzeugtürgriff aus den Figuren 1a und 1b in schematischen Ansichten, um die darin aufgenommenen Komponenten und deren Lage darzustellen.the Figures 2a, 2b and 2c show the vehicle door handle from the Figures 1a and 1b in schematic views to show the components incorporated therein and their location.

Fig. 2a zeigt den Fahrzeugtürgriff in einer schematischen Schnittansicht von oben. In Fig. 2b sind die Komponenten im Innern des Fahrzeugtürgriffs 1 mit gebrochenen Linien dargestellt, währen der Fahrzeugtürgriff von vorne gezeigt ist. In Figur 2c ist die Darstellung gegenüber der Fig. 2b geändert, so dass der Fahrzeugtürgriff mit gebrochenen Linien dargestellt ist, währen die vorderseitigen Komponenten im Innern mit durchgezogenen Linien dargestellt sind. Im Inneren des Fahrzeugtürgriffes 1, nämlich im Bereich der Handhabe 2, also dem Mittelabschnitt des Fahrzeugtürgriffes 1 ist eine Platine 5 angeordnet. Die Platine 5 ist im Gehäuse des Fahrzeugtürgriffes 1 beispielsweise mit entsprechenden Befestigungsmitteln (nicht gezeigt) verklipst oder darin vergossen. Figure 2a shows the vehicle door handle in a schematic sectional view from above. In Figure 2b the components inside the vehicle door handle 1 are shown in broken lines, while the vehicle door handle is shown from the front. In Figure 2c is the representation compared to the Figure 2b changed so that the vehicle door handle is shown in broken lines, while the interior front components are shown in solid lines. Inside the vehicle door handle 1, namely in the area of the handle 2, ie the middle section of the vehicle door handle 1, a circuit board 5 is arranged. The circuit board 5 is clipped or encapsulated in the housing of the vehicle door handle 1, for example with appropriate fastening means (not shown).

Auf der Platine 5, die beispielsweise auch als Mehrlagenplatine ausgebildet sein kann, ist in diesem Beispiel auf der Außenseite (in Figur 2a auf der unteren Seite) eine Antennenspule 6 ausgebildet, die als gedruckte Leiterspule auf der Platine ausgeführt ist. Auf der Rückseite der Platine 5, also auf der dem Fahrzeug zugewandten Seite der Platine (in Figur 2a oben) ist eine Sensoranordnung 7 mit induktiven Sensoren (7a, 7b, 7c) platziert. An der Innenseite des Gehäuses des Fahrzeugtürgriffes im Abschnitt der Handhabe 2 ist eine Schirmelektrode 8 aus einem metallischen Flachmaterial benachbart zu den induktiven Sensoren der Sensoranordnung 7 platziert.On the circuit board 5, which can also be designed as a multi-layer circuit board, for example, is in this example on the outside (in Figure 2a on the lower side) an antenna coil 6 is formed, which is designed as a printed conductor coil on the circuit board. On the back of circuit board 5, i.e. on the side of the circuit board facing the vehicle (in Figure 2a above) a sensor arrangement 7 with inductive sensors (7a, 7b, 7c) is placed. On the inside of the housing of the vehicle door handle in the handle 2 section, a shielding electrode 8 made of a flat metal material is placed adjacent to the inductive sensors of the sensor arrangement 7 .

Wie in Figur 2a, 2b und 2c erkennbar, überlappen die Längserstreckungen der Sensoranordnung 7 mit den induktiven Sensoren und der Schirmelektrode 8 sowie die Antennenspule 6 in Längsrichtung 10 des Fahrzeugtürgriffes 1. Wie die Figuren 2b und 2c zeigen, sind die Komponenten, also die Antennenspule 6 einerseits und die Sensoreinrichtung 7 mit den induktiven Sensoren sowie die Schirmelektrode 8 in einer Richtung quer zur Längserstreckung der Handhabe 2 überlappungsfrei, nämlich übereinander angeordnet. In diesem Ausführungsbeispiel liegt die Antennenspule 6 in Figuren 2b und 2c, also bei einer Frontansicht des Fahrzeugtürgriffes 1 oberhalb der Sensoreinrichtung 7 mit den induktiven Sensoren sowie der zugeordneten Schirmelektrode 8. Es ist deutlich, dass die Antennenspule 6 den nahezu gesamten Längsabschnitt der Handhabe 2 überspannt, um einen möglichst weiten Kopplungsbereich für eine Nahfeldkommunikation bereitzustellen. Dennoch ist es möglich, bei beengtem Bauraum auch die induktive Sensorik unterzubringen, ohne dass sich die elektromagnetischen Felder der induktiven Komponenten unmittelbar gegenseitig durchgreifen und beeinflussen.As in Figure 2a, 2b and 2c recognizable, overlap the longitudinal extensions of the sensor arrangement 7 with the inductive sensors and the shielding electrode 8 and the antenna coil 6 in the longitudinal direction 10 of the vehicle door handle 1. Like the Figures 2b and 2c show, the components, ie the antenna coil 6 on the one hand and the sensor device 7 with the inductive sensors and the shielding electrode 8 in a direction transverse to the longitudinal extent of the handle 2 without overlapping, namely arranged one above the other. In this embodiment, the antenna coil is 6 in Figures 2b and 2c , i.e. in a front view of the vehicle door handle 1 above the sensor device 7 with the inductive sensors and the associated shielding electrode 8. It is clear that the antenna coil 6 spans almost the entire longitudinal section of the handle 2 in order to provide the widest possible coupling range for near-field communication. Nevertheless, it is possible to also accommodate the inductive sensor technology in a cramped space without the electromagnetic fields of the inductive components directly intervening and influencing each other.

Figur 3a zeigt schematisch und beispielhaft, wie ein Benutzer 20 mit einem Gerät 21 zur Nahfeldkommunikation, beispielsweise einem NFC-kommunikationsfähigen Handy, in Kopplungsdistanz zu dem Fahrzeugtürgriff 1 gelangt und das Gerät 21 den Fahrzeugtürgriff annähert und beispielsweise auf den Fahrzeugtürgriff 1 auflegt (im oberen Bereich der Handhabe in den Figuren 2b und 2c). Auf diese Weise kann eine Kopplung 22 eingerichtet werden und ein Datenaustausch über die Antennenspule 6 etabliert werden. Figure 3a shows schematically and by way of example how a user 20 with a device 21 for near-field communication, for example a mobile phone capable of NFC communication, reaches the coupling distance from the vehicle door handle 1 and that Device 21 approaches the vehicle door handle and, for example, places it on the vehicle door handle 1 (in the upper area of the handle in the Figures 2b and 2c ). In this way, a coupling 22 can be set up and data exchange can be established via the antenna coil 6 .

Die Figuren 3b und 3c zeigen mechanische Einwirkungen eines Benutzers auf den Fahrzeugtürgriff in übertriebener Form, wobei die Verformung des Fahrzeugtürgriffes 1, insbesondere des Handhabenabschnittes 2 bei mechanischer Einwirkung gezeigt ist. Eine solche mechanische Einwirkung auf den Fahrzeugtürgriff würde in dem Ausführungsbeispiel zu einer Lageveränderung der Schirmelektrode 8 gegenüber der Sensoranordnung 7 mit den induktiven Sensoren führen und damit eine detektierbare Einwirkung auf den Fahrzeugtürgriff.the Figures 3b and 3c show mechanical effects of a user on the vehicle door handle in an exaggerated form, with the deformation of the vehicle door handle 1, in particular of the handle section 2, being shown under mechanical action. In the exemplary embodiment, such a mechanical effect on the vehicle door handle would lead to a change in the position of the shielding electrode 8 relative to the sensor arrangement 7 with the inductive sensors, and thus to a detectable effect on the vehicle door handle.

Claims (5)

  1. Vehicle door handle (1) with sensor electronics (7) which have at least one inductive sensor (7a, 7b, 7c), with
    a transmitting/receiving device having an antenna coil (6) which is designed for near-field communication, the antenna coil being designed as an elongate structure
    wherein a section of the vehicle door handle (1) is formed as an elongated, graspable handle (2) in which the sensor electronics (7) and the antenna coil (6) are accommodated, wherein the antenna coil is aligned with its longest extension in the longitudinal direction of the handle (2),
    wherein the at least one inductive sensor in the handle (2) is associated with at least one screen electrode (8) formed from a conductive material, which is placed adjacent to the inductive sensor (7a, 7b, 7c),
    wherein the at least one inductive sensor (7a, 7b, 7c) and the associated shield electrode (8) are arranged adjacent to the antenna coil (6) in such a way that the shield electrode with inductive sensor on the one hand and the antenna coil on the other hand
    - completely overlap in a direction in the longitudinal extension (10) of the handle (2) and
    - are arranged one above the other without overlapping in a direction transverse to the longitudinal extent (10) of the handle.
  2. Vehicle door handle according to one of the preceding claims, wherein the antenna coil is designed for near field communication according to the NFC standard.
  3. Vehicle door handle according to any one of the preceding claims, wherein the shield electrode is formed of a metallic flat material and is arranged between the inductive sensor and a housing portion of the handle.
  4. Vehicle door handle according to any one of the preceding claims, wherein the shielding electrode is formed as a metallic coating inside or outside the housing of the handle.
  5. Vehicle door handle according to any one of the preceding claims, wherein the antenna coil extends at least 6 cm, preferably at least 10 cm, in the longitudinal direction of the handle.
EP19210074.1A 2018-12-04 2019-11-19 Vehicle door handle with sensor device and wireless communication device Active EP3664047B1 (en)

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Application Number Priority Date Filing Date Title
DE102018130791.8A DE102018130791A1 (en) 2018-12-04 2018-12-04 Vehicle door handle with sensor device and wireless communication device

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EP3664047B1 true EP3664047B1 (en) 2023-01-11

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004060191A (en) * 2002-07-25 2004-02-26 Aisin Seiki Co Ltd Door handle for car
DE102009002566A1 (en) * 2009-04-22 2010-10-28 Huf Hülsbeck & Fürst Gmbh & Co. Kg Sensor electronics in a motor vehicle door handle
DE102014107559A1 (en) 2014-05-28 2015-12-03 Huf Hülsbeck & Fürst Gmbh & Co. Kg Sensor device for a motor vehicle
DE102015100074A1 (en) * 2014-09-08 2016-03-10 Huf Hülsbeck & Fürst Gmbh & Co. Kg Door handle assembly for a motor vehicle
FR3038642B1 (en) * 2015-07-08 2017-07-14 Continental Automotive France DEVICE FOR DETECTING THE INTENTION TO LOCK OR UNLOCK A VEHICLE OF A MOTOR VEHICLE BY A USER
DE102015119096A1 (en) * 2015-11-06 2017-05-11 Huf Hülsbeck & Fürst Gmbh & Co. Kg Door handle assembly for a motor vehicle

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