WO2008056601A1 - Unité d'antenne - Google Patents

Unité d'antenne Download PDF

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Publication number
WO2008056601A1
WO2008056601A1 PCT/JP2007/071372 JP2007071372W WO2008056601A1 WO 2008056601 A1 WO2008056601 A1 WO 2008056601A1 JP 2007071372 W JP2007071372 W JP 2007071372W WO 2008056601 A1 WO2008056601 A1 WO 2008056601A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
antenna
electrode
winding
bobbin
Prior art date
Application number
PCT/JP2007/071372
Other languages
English (en)
Japanese (ja)
Inventor
Hozumi Ueda
Koji Henmi
Norihiko Aida
Original Assignee
Sumida Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumida Corporation filed Critical Sumida Corporation
Priority to JP2008543051A priority Critical patent/JPWO2008056601A1/ja
Priority to EP07831106.5A priority patent/EP2093833B1/fr
Priority to CN200780039013.8A priority patent/CN101529654B/zh
Publication of WO2008056601A1 publication Critical patent/WO2008056601A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/54—Electrical circuits
    • E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
    • E05B81/76—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
    • E05B81/78—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles as part of a hands-free locking or unlocking operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/54—Electrical circuits
    • E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
    • E05B81/76—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
    • E05B81/77—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles comprising sensors detecting the presence of the hand of a user
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H01F2005/027—Coils wound on non-magnetic supports, e.g. formers wound on formers for receiving several coils with perpendicular winding axes, e.g. for antennae or inductive power transfer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • H01Q1/3241—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems particular used in keyless entry systems

Definitions

  • the present invention relates to an antenna device that receives and / or transmits electromagnetic signals.
  • an electronic key system that locks and unlocks a door for a vehicle in response to a portable device carried by a user has been widely used in automobiles.
  • an electronic key system (a so-called keyless entry one system) equipped with an antenna device that is arranged inside a door handle and communicates with a portable device is known!
  • the antenna devices described in Patent Documents 1 and 2 include a sensor electrode for detecting that the user's hand has touched the door handle based on a change in capacitance.
  • the antenna device described in Patent Document 1 is configured by stacking an antenna coil for transmitting and receiving signals and a plurality of thin core sheets, and around which an antenna coil is wound. And.
  • one of the plurality of core sheets is a sensor electrode connected to the capacitance detection device.
  • the antenna device described in Patent Document 2 includes a first coil constituting the first antenna, a core around which the first coil is wound, a bobbin disposed outside the core, and a bobbin. And a second coil wound around.
  • the core is formed in an elongated rectangular parallelepiped shape, and the first coil is disposed on the outer peripheral side of the core with the short direction of the core as the winding direction. The coil is wound around the core in the winding direction. It is arrange
  • the second coil wound around the bobbin is a sensor electrode connected to the sensor detection unit.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2006-96104
  • Patent Document 2 JP 2003-166369 Koyuki
  • the second coil constituting the electrode sensor is arranged on the outer peripheral side of the core with the longitudinal direction of the core as the winding direction. Therefore, in this antenna device, there is a possibility that a malfunction may occur in that the door is unlocked even when the user does not intend to unlock the door, but accidentally touches the outside of the door handle.
  • an object of the present invention is to provide an antenna device having a configuration capable of transmitting and receiving appropriate signals and preventing malfunction of a predetermined operation object. .
  • an antenna device of the present invention includes an antenna coil for performing at least one of reception and transmission of electromagnetic signals, a bobbin around which the antenna coil is wound, and a bobbin.
  • the core to be housed includes a sensor electrode coil wound around the bobbin.
  • the antenna device includes a sensor electrode coil for detecting a predetermined state change based on a change in capacitance. That is, in the antenna device of the present invention, a predetermined state change is detected using the sensor electrode coil. For this reason, even when the sensor electrode coil is wound around the bobbin around which the antenna coil is wound, it is affected by the eddy current loss that hinders the transmission and reception of appropriate signals for the antenna device force. An appropriate signal can be transmitted and received without causing a problem.
  • the bobbin includes an electrode coil winding portion that protrudes in one direction from the antenna coil winding portion and can be wound with the sensor electrode coil. That is, in the antenna device of the present invention, the sensor electrode coil can be wound around one direction with the bobbin. Therefore, it is possible to detect only the state change in one direction by arranging the portion where the coil for the sensor electrode is wound in the detection direction for detecting the predetermined state change. In other words, even if a state change occurs in the other direction, it is possible not to detect the state change. Therefore, it is possible to prevent the movement of the predetermined moving object when the state change occurs in the other direction. As a result, it is possible to prevent malfunction of a predetermined operation object.
  • the bobbin preferably includes a plurality of winding protrusions in which a plurality of electrode coil winding portions are formed.
  • one end of the antenna coil is always grounded! /.
  • a wound and grounded antenna coil can prevent changes in electrostatic capacity in the sensor electrode coil.
  • the antenna device that is effective in the present invention can transmit and receive an appropriate signal and can prevent a predetermined operation target from malfunctioning.
  • FIG. 1 is a perspective view showing an antenna device according to an embodiment of the present invention from one direction.
  • FIG. 2 is a perspective view showing the antenna device shown in FIG. 1 from the other direction.
  • FIG. 3 is a perspective view showing the bobbin shown in FIG. 1.
  • FIG. 4 is a diagram for explaining a schematic configuration of an electronic key system using the antenna device shown in FIG. 1.
  • FIG. 5 is a diagram showing a part of the circuit configuration of an electronic key system using the antenna device shown in FIG. 1.
  • FIG. 6 is a diagram for explaining the effect of the antenna device shown in FIG. 1.
  • FIG. 7 is a circuit diagram showing an antenna drive unit that is effective in another embodiment of the present invention.
  • FIG. 8 is a diagram for explaining an outline of a winding pattern of an electrode coil in a sensor sensitivity verification experiment.
  • FIG. 9 is a perspective view showing a specific example of the winding pattern of the electrode coil shown in FIG. 8, (A) shows a specific example of the No. 1 and No. 2 winding patterns of FIG. B) shows specific examples of winding patterns No. 3 and No. 4 in Fig. 8.
  • FIG. 10 is a conceptual diagram for explaining a method of a sensor sensitivity verification experiment.
  • FIG. 11 is a diagram for explaining the arrangement direction of the copper plate in the sensor sensitivity verification experiment.
  • FIG. 12 is a graph showing the results of a sensor sensitivity verification experiment, (A) shows the result when one end of the antenna coil is grounded, and (B) shows the result when one end of the antenna coil is not grounded. Results are shown.
  • FIG. 1 is a perspective view showing an antenna device 1 that exerts force on an embodiment of the present invention from one direction.
  • FIG. 2 is a perspective view showing the antenna device 1 shown in FIG. 1 from the other direction.
  • FIG. 3 is a perspective view showing the bobbin 3 shown in FIG.
  • the antenna device 1 of the present embodiment is an antenna device used in, for example, an electronic key system for automobiles. As shown in FIGS. 1 and 2, the antenna device 1 is housed in an antenna coil 2 for receiving and / or transmitting electromagnetic signals, a bobbin 3 around which the antenna coil 2 is wound, and a bobbin 3. And a sensor electrode coil 5 (hereinafter referred to as “electrode coil 5”) wound around the bobbin 3 in order to detect a predetermined state change based on a change in capacitance. I have.
  • the antenna device 1 includes two terminals 6 and 7 to which both ends of the electrode coil 5 are fixed, two terminals 8 and 9 to which both ends of the antenna coil 2 are fixed, A fixed base 10 to which the terminals 8 and 9 are fixed, and a terminal 11 fixed to the fixed base 10 are provided.
  • the diagonally downward direction in FIG. 1 is the X direction
  • the diagonally upward direction orthogonal to the X direction is the Y direction
  • the vertical direction in FIG. 1 is orthogonal to the X direction and the Y direction.
  • the directional force on the lower right side of Fig. 1 is the XI direction
  • the opposite direction is the X2 direction
  • the directional force is the lower left side of Fig. 1
  • the Y direction is the Y1 direction
  • the opposite direction is the Y2 direction
  • the upward direction in Fig. 1 is the Z1 direction
  • the downward direction in Fig. 1 is the Z2 direction
  • a plane formed by the Y direction and the Z direction is a YZ plane
  • a plane formed by the Z direction and the X direction is a ZX plane.
  • the antenna coil 2 is formed by covering the surface of a conductive wire with an insulating film.
  • one antenna coil 2 is wound around a later-described antenna coil winding portion 3a formed on the bobbin 3, and a later-described coil winding portion 10 formed on the fixed base 10. It is wound around c. Further, for example, in this embodiment, the front end side (end side on the winding start side) of the antenna coil 2 is fixed to the terminal 8, and the rear end side (end end side on the winding end side) of the antenna coil 2 is connected to the terminal 9. It is fixed to.
  • the fixed base 10 is formed of a nonmagnetic and insulating member (for example, a resin member).
  • the fixed base 10 has a substantially rectangular parallelepiped base-side mounting portion 10a attached to a base mounting portion 3e, which will be described later, formed at the end of the bobbin 3 in the X2 direction, and the terminals 8, 9, and 11 are fixed.
  • a rectangular parallelepiped terminal fixing portion 1 Ob and a substantially rectangular parallelepiped coil winding portion 10c disposed between the base side mounting portion 1 Oa and the terminal fixing portion 1 Ob are configured.
  • the base side mounting portion 10a is disposed at the end in the XI direction
  • the terminal fixing portion 10b is disposed at the end in the X2 direction.
  • the fixed base 10 may be formed integrally with the bobbin 3.
  • the base side mounting portion 10a is formed with an engaging projection 10d that engages with an engaging recess 3k formed in a base mounting portion 3e described later. Further, the terminals 8, 9, and 11 are fixed to the terminal fixing portion 10b so as to protrude from the end of the fixed base 10 in the X2 direction toward the X2 direction.
  • the core 4 is formed of a magnetic material such as Mn—Zn ferrite or Ni—Zn ferrite, for example.
  • the core 4 is formed in a flat and elongated rectangular parallelepiped shape. This core 4 is disposed between two flat plate portions 3g forming an antenna coil winding portion 3a described later.
  • the electrode coil 5 is formed by covering the surface of a conductive wire with an insulating coating.
  • one electrode coil 5 is wound around a later-described electrode coil winding portion 3 b formed on the bobbin 3. Further, in this embodiment, for example, the front end side (the end side on the winding start side) of the electrode coil 5 is fixed to the terminal 6, and the rear end side (the end side on the winding end side) of the electrode coil 5 is the terminal. Fixed to 7! /
  • the bobbin 3 is formed of a non-magnetic and insulating member (for example, a resin member or the like), and is formed in a substantially hollow substantially rectangular parallelepiped shape as a whole. As shown in FIG. 3 and the like, the bobbin 3 includes a winding projection having an antenna coil winding portion 3a around which the antenna coil 2 is wound and an electrode coil winding portion 3b around which the electrode coil 5 can be wound. 3c, terminal fixing portion 3d to which the terminals 6 and 7 are fixed, base mounting portion 3e to which the fixing base 10 is attached, and a positioning protrusion for positioning the winding position of the antenna coil 2 in the X direction Has 3f.
  • a non-magnetic and insulating member for example, a resin member or the like
  • the terminal fixing portion 3d, the antenna coil winding portion 3a, and the base mounting portion 3e are arranged adjacently in this order from the XI direction toward the X2 direction.
  • the winding protrusion 3c and the positioning protrusion 3f are formed so as to protrude from the antenna coil winding portion 3a in a predetermined direction. Note that the winding protrusion 3c and the base mounting portion 3e, together with the positioning protrusion 3f, serve to position the winding position of the antenna coil 2 in the X direction, as will be described later.
  • the bobbin 3 of this embodiment includes a plurality of winding protrusions 3c. Specifically, the bobbin 3 includes four winding protrusions 3c formed at predetermined intervals in the X direction. Further, the bobbin 3 of this embodiment includes a plurality of positioning protrusions 3f. Specifically, the bobbin 3 is formed on each of two flat plate portions 3g described later that form the antenna coil winding portion 3a, and the total formed between the four winding projections 3c. Six positioning protrusions 3f are provided.
  • the antenna coil winding portion 3a is formed by two elongated flat plate portions 3g parallel to the ZX plane. Specifically, the antenna coil winding portion 3a is formed by connecting two flat plate portions 3g via a terminal fixing portion 3d and a winding projection 3c. The flat plate portions 3g are disposed on both ends of the bobbin 3 in the Y direction.
  • the terminal fixing portion 3d is formed in a substantially rectangular parallelepiped shape.
  • the terminal fixing portion 3d is formed so that an arrangement hole 3h in which the end portion on the XI direction side of the core 4 is disposed penetrates in the X direction, and the lead-in / out groove 3i of the electrode coil 5 is an end surface in the Z1 direction. Is formed.
  • a fixing hole for fixing the terminals 6 and 7 is formed on the end surface in the XI direction of the terminal fixing portion 3d, and the terminal fixing portion 3d protrudes from the XI direction end of the bobbin 3 in the XI direction. And terminals 6 and 7 are fixed.
  • the base attachment portion 3e is formed in a block shape and is disposed at the X2 direction end of the two flat plate portions 3g.
  • the base mounting portion 3e is formed with an engaging recess 3k that engages with the engaging protrusion 10d of the fixed base 10.
  • the end surface 3m in the XI direction of the base mounting portion 3e parallel to the YZ plane fulfills the function of positioning the winding position of the antenna coil 2 in the X direction together with the positioning projection 3f as described above.
  • the winding projection 3c is formed such that a flat plate-like portion parallel to the YZ plane protrudes outward in the Y direction and outward in the Z direction from the flat plate portion 3g.
  • the winding protrusion 3c slightly protrudes outward in the Y direction and slightly in the Z2 direction in order to position the winding position of the antenna coil 2 in the X direction.
  • it is formed so as to protrude greatly from the flat plate portion 3 g in the Z1 direction and to connect the two flat plate portions 3 g. .
  • the portion of the winding protrusion 3c that slightly protrudes in the Z2 direction connects the two flat plate portions 3g. Connected to.
  • the shape of the winding protrusion 3c arranged closest to the XI direction is substantially rectangular when viewed from the X direction, and the other winding protrusion 3c is viewed from the X direction.
  • a groove 3n is formed in a predetermined range in the Y direction in the portion protruding in the Z1 direction of the winding projection 3c, and a double-sided force electrode coil 5 can be wound around the groove 3n.
  • This is a coil winding part 3b.
  • the winding protrusion 3c of the present embodiment is formed with two electrode coil winding portions 3b arranged with a predetermined interval in the Y direction.
  • the end face of the winding protrusion 3c in the XI direction fulfills the function of determining the position of the winding position of the antenna coil 2 in the X direction.
  • the positioning protrusion 3f is formed so as to protrude from the two flat plate portions 3g to the Y direction outer side and the Z direction outer side from the flat plate-like partial force S parallel to the YZ plane. Specifically, the positioning protrusion 3f is positioned so that the force of the two flat plate portions 3g slightly protrudes outward in the Y direction and outward in the Z direction in order to position the winding position of the antenna coil 2 in the X direction. Is formed.
  • the antenna coil 2 is formed by each of the XI-direction end surface of the positioning projection 3f, the XI-direction end surface of the winding projection 3c, and the XI-direction end surface 3m of the base mounting portion 3e.
  • the antenna coil is wound around the coil coil winding portion 3a in a state of being positioned in the X direction. That is, in this embodiment, the antenna coil portion 20 is formed at seven locations by the antenna coil 2 wound around the bobbin 3 in the short direction (periphery formed from the Y direction and the Z direction). [0037] As shown in FIG.
  • the electrode coil 5 includes an electrode coil winding portion 3b disposed closest to the XI direction side and an electrode coil disposed closest to the X2 direction.
  • the coil winding portion 3b is wound so as to be in contact with the end surface in the X2 direction and to be in contact with both ends of the electrode coil winding portion 3b in the Y direction.
  • the electrode coil 5 is wound, for example, on the electrode coil winding portion 3b disposed on the Y1 direction side and then on the electrode coil winding portion disposed on the Y2 direction side. It is wound around 3b, and on the Z1 direction side of the bobbin 3, two electrode coil portions 21 are formed.
  • the electrode coil 5 is wound around the electrode coil winding portion 3b protruding in the Z1 direction, and is arranged on the Z1 direction side of the bobbin 3.
  • FIG. 4 is a diagram for explaining a schematic configuration of an electronic key system using the antenna device 1 shown in FIG.
  • FIG. 5 is a diagram showing a part of a circuit configuration of an electronic key system using the antenna device 1 shown in FIG.
  • the antenna device 1 configured as described above is used, for example, in an electronic key system for automobiles (so-called keyless entry system).
  • This electronic key system is composed of an in-vehicle device mounted on both sides of the vehicle and a portable device carried by a user who operates the vehicle.
  • the in-vehicle device includes an antenna drive unit 26 that energizes the antenna coil 2 to drive the antenna device 1, a drive control unit 27 that controls the antenna drive unit 26, and an electrode coil 5.
  • a detection unit 28 that detects a change in electrostatic capacity such as between the electrode coil 5 and the ground (ground).
  • the antenna device 1 is arranged inside a hand knob (door handle) 31 of the door 30 of the automobile. Specifically, the Z1 direction side of the antenna device 1 (that is, the side on which the electrode coil 5 is disposed) is directed to the door 30 side (that is, the state toward the back side of the paper in FIG. 4).
  • the antenna device 1 is arranged inside the door handle 31.
  • the detection unit 28 is disposed inside the door handle 31 so as to be adjacent to the antenna device 1.
  • the antenna drive unit 26 and the drive control unit 27 are arranged in a main body portion of an automobile (not shown).
  • the antenna drive unit 26 is configured, for example, by connecting an n-channel FET (Field Effect Transistor) 32 and a p-channel FET 33 in series as shown in FIG. It is. As shown in FIG. 5, the gates of the n-channel FET 32 and the p-channel FET 33 are connected to the drive control unit 27. The drains of the n-channel FET 32 and the p-channel FET 33 are connected via a capacitor 34 to, for example, the terminal 8 to which the end of the antenna coil 2 is fixed. In addition, the source of the n-channel FET 32 is connected to an in-vehicle battery (not shown) for energizing the antenna coil 2, and the source of the p-channel FET 33 is grounded!
  • n-channel FET Field Effect Transistor
  • one end of the antenna coil 2 is always grounded.
  • the terminal 9 to which the end of the antenna coil 2 is fixed is directly grounded via a predetermined wiring.
  • the detection unit 28 is connected to terminal portions 6 and 7 to which both end portions of the electrode coil 5 are fixed via a predetermined wiring.
  • the detection unit 28 detects, for example, a change in electrostatic capacitance between the electrode coil 5 and the ground, which changes when the user's hand comes into contact with the inside of the door handle 31 (the back side in FIG. 4). . Then, it outputs a detection signal of a change in capacitance to the drive control unit 27.
  • the electronic key system having the above-described configuration operates as follows. First, when the user touches the inside of the door handle 31 in order to unlock the locked door 30 and get into the automobile, the capacitance between the electrode coil 5 and the ground changes. Based on the change in capacitance, the detection unit 28 outputs a detection signal of change in capacitance to the drive control unit 27.
  • the drive control unit 27 drives the antenna drive unit 26 to energize the antenna coil 2 based on the input detection signal of the change in capacitance.
  • the antenna device 1 transmits a predetermined detection signal wirelessly to a portable device (not shown).
  • the portable device that has received the signal transmitted from the antenna coil 2 transmits an unlock signal for the door 30 toward a predetermined door opening / closing control unit (not shown) of the in-vehicle device.
  • the door opening / closing control unit unlocks the door 30 by driving an opening / closing device (not shown) of the door 30 based on the unlocking signal.
  • the electronic key system may operate in the same manner as the electronic key system described in Patent Document 1 and Patent Document 2 described above, for example.
  • the electronic key system It may operate as follows. That is, when unlocking the locked door 30, first, the drive control unit 27 drives the antenna drive unit 26 to turn on the antenna coil 2 between the portable device and the antenna device 1. A predetermined signal is transmitted and received. If the portable device registration code stored on the vehicle-mounted device side is confirmed by transmission / reception of this signal, the detection unit 28 is in a state where it can detect a change in capacitance between the electrode coil 5 and the ground. In this state, when the user's hand touches the inside of the door handle 31 and the capacitance between the electrode coil 5 and the ground changes, the door 30 is opened by opening the door 30 opening / closing device.
  • the antenna device 1 is used for an electrode for detecting a predetermined state change such as a user's hand contacting the inside of the door handle 31 based on a change in capacitance.
  • a coil 5 is provided. That is, in the antenna device 1 of the present embodiment, a predetermined state change is detected using the electrode coil 5. Therefore, even when the electrode coil 5 is wound around the bobbin 3 around which the antenna coil 2 is wound, the transmission and reception of appropriate signals from the antenna device 1 is hindered by the influence of eddy current loss. There is no risk of such problems. As a result, in this embodiment, it is possible to transmit and receive appropriate signals from the antenna device 1.
  • the electrode coil winding portion 3b around which the electrode coil 5 can be wound is formed so as to protrude from the antenna coil winding portion 3a in the Z1 direction. That is, in this embodiment, the electrode coil 5 is wound around the bobbin 3 on the Z1 direction side.
  • one end of the antenna coil 2 is always grounded. Therefore, for example, when the antenna device 1 is used in an automobile electronic key system having the configuration shown in FIGS. 4 and 5, when the user touches the door handle 31 from the inside of the door handle 31, the coil for electrode is used. When the user touches the door handle 31 from the outside of the door handle 31 (the front side of the paper in FIG. 4), one end of the antenna coil 2 is grounded. The capacitance between the coil 5 and the ground does not change.
  • the bobbin 3 includes four winding protrusions 3c formed at predetermined intervals in the X direction.
  • Each winding projection 3c includes two electrode coil winding portions 3b formed at a predetermined interval in the Y direction. That is, the bobbin 3 includes a total of eight coil winding portions 3b for electrodes. Therefore, the electrode coil winding portion 3b around which the electrode coil 5 is wound is arbitrarily selected from the eight electrode coil winding portions 3b, and the electrode coil 5 is wound at an arbitrary position. By turning, it becomes possible to arrange the coil 5 for electrodes at an arbitrary position. That is, in addition to the arrangement of the electrode coil 5 shown in FIG. 1, for example, as shown in FIG.
  • two winding projections 3c arranged inside the X direction are used. It is possible to wind the electrode coil 5 around the electrode coil winding portion 3b formed in the above and arrange it. In addition to FIG. 6, various electrode coils 5 can be arranged. As a result, the detection range by the electrode coil 5 can be easily changed.
  • the electrode coil 5 constitutes a sensor electrode that detects a predetermined state change
  • the number of turns of the electrode coil 5 wound around the electrode coil winding portion 3b (turn-off)
  • the inductance value of the sensor electrode can be easily and arbitrarily set according to the number.
  • the bobbin 3 since the bobbin 3 includes eight electrode coil winding portions 3b, the electrode coil portion formed by the electrode coil 5 wound around the electrode coil winding portion 3b. It is possible to arbitrarily set the inductance value of 21 and the inductance value of the electrode coil portion 21 formed by the electrode coil 5 wound around the other electrode coil winding portion 3b. .
  • FIG. 8 is a diagram for explaining the outline of the winding pattern of the electrode coil 5 in the sensor sensitivity verification experiment.
  • FIG. 9 is a perspective view showing a specific example of the winding pattern of the electrode coil 5 shown in FIG. 8, and (A) shows a specific example of the No. 1 and No. 2 winding patterns in FIG. (B) shows specific examples of winding patterns No. 3 and No. 4 in FIG.
  • FIG. 10 is a conceptual diagram for explaining the method of the sensor sensitivity verification experiment.
  • FIG. 11 is a diagram for explaining the arrangement direction of the copper plate 40 in the sensor sensitivity verification experiment.
  • Fig. 12 is a graph showing the results of a sensor sensitivity verification experiment. (A) shows the result when one end of antenna coil 2 is grounded, and (B) shows that one end of antenna coil 2 is not grounded. Show the results when
  • the electrode coil 5 is wound to constitute the sensor electrode.
  • the sensor electrode, the detection unit 28, and the like constitute a sensor for detecting a predetermined state change.
  • the relationship between the winding pattern of the electrode coil 5 and the sensitivity of the sensor (sensor sensitivity) will be described using experimental results.
  • the antenna device 1 shown in FIGS. 8, 9, and 11 is slightly different from the antenna device 1 shown in FIGS. 1 to 3, but is almost the same as the antenna device 1 shown in FIGS. It is configured similarly and has similar functions.
  • FIG. 8, FIG. 9, and FIG. 11 components having the same functions as those of the antenna device 1 shown in FIGS. 1 to 3 are denoted by the same reference numerals.
  • an antenna device 1 having a sensor electrode composed of an electrode coil 5 wound in four winding patterns No. 1 force, et al. No. 4 was used.
  • the sensor electrode (No. 1, No. 2) composed of the coil 5 for the electrode wound so as to surround the entire circumference of the surface on the Z1 direction side as the reaction surface
  • An antenna device 1 having sensor electrodes (No. 3, No. 4) composed of electrode coils 5 wound separately on both sides (both sides in the Y direction) on the reaction surface was used.
  • Fig. 9 (A) it is composed of the electrode coil 5 wound in a winding pattern of No. 1 in which one electrode coil 5 is wound once.
  • Sensor electrode composed of an electrode coil 5 wound in No. 2 winding pattern in which one electrode coil 5 is wound four times in FIG. 9A.
  • 9B a sensor electrode composed of the electrode coil 5 wound in No. 3 winding pattern in which one electrode coil 5 is wound once
  • one electrode coil 5 is An antenna device 1 having a sensor electrode composed of an electrode coil 5 wound with a No. 4 winding pattern in a wound state was used in a verification experiment.
  • an antenna device having a sensor electrode composed of a sheet core 55 made of a thin magnetic member instead of the electrode coil 5 was also tested in a verification experiment. Using.
  • the antenna device 1 having the sensor electrode was fixed at a position 30 mm away from a metal plate (a steel plate corresponding to the metal plate of the door 30 described above) 41.
  • the copper plate 40 viewed as an object to be detected is gradually brought closer to the antenna device 1 and the antenna device 1 and the copper plate 40 when the copper plate 40 is detected by the sensor constituted by the electrode coil 5 and the like Distance (detection distance) was measured.
  • the width of the antenna device 1 used in this experiment in the longitudinal direction (X direction in FIG. 1) is 55 mm, and the width in the short direction (Y direction in FIG. 1). ) was 16mm wide.
  • the copper plate 40 used in the experiment was formed in a rectangular shape, and the width in the short direction was 25 mm.
  • the end portions (or the sheet core 55) of the antenna coil 2 and the electrode coil 5 are connected to the experimental substrate 42.
  • the longitudinal direction of the copper plate 40 and the longitudinal direction of the antenna device 1 are orthogonal to each other, and a part of the sensor electrode and the copper plate 40 are in the Z direction.
  • the pattern in which the copper plate 40 gradually approaches the antenna device 1 (A pattern) and the longitudinal direction of the copper plate 40 and the longitudinal direction of the antenna device 1 as shown in FIG.
  • the copper plate 40 is connected to the antenna device 1 in two patterns (B pattern). The detection distance was measured close to the device 1.
  • one end of the antenna coil 2 is grounded (the state shown in FIG. 5), and one end of the antenna coil 2 is not grounded (for example, in FIG.
  • the detection distance was measured with a capacitor placed between the ground and the ground.
  • FIG. 12 (A) in a state where one end of the antenna coil 2 is grounded, it has a sensor electrode composed of an electrode coil 5 wound in a pattern of No. 4. It was found that the antenna device 1 has the largest detection distance and the antenna device 1 has the best sensor sensitivity. Further, as shown in FIG. 12 (B), even if the end of the antenna coil 2 is not grounded, the sensor electrode composed of the electrode coil 5 wound in the pattern of No. 4 is used.
  • the detection distance of the antenna device 1 having the largest was the largest, and the sensor sensitivity of the antenna device 1 was the best.
  • the sensor sensitivity of the antenna device 1 is the best when the sensor electrode is constituted by the electrode coil 5 that is wound a plurality of times on both sides of the reaction surface.
  • “A” and “B” in FIG. 12 are detection distances when the copper plate 40 is brought close to the antenna device 1 in the A pattern and the B pattern, respectively.
  • the detection distance did not change in the patterns No. 1 to No. 4 regardless of whether one end of the antenna coil 2 was grounded or not. In other words, it was found that when the sensor electrode is constituted by the electrode coil 5, the grounding state of the antenna coil 2 hardly affects the sensor sensitivity of the antenna device 1. On the other hand, in the pattern No. 5 using the seat core 55, the detection distance fluctuated depending on whether one end of the antenna coil 2 was grounded or not grounded. In other words, it was found that when the sensor electrode is composed of the seat core 55, the grounding state of the antenna coil 2 affects the sensor sensitivity of the antenna device. From the above, when the sensor electrode is configured with the electrode coil 5, the sensor sensitivity of the antenna device 1 is less affected by the state of the antenna coil 2 than when the sensor electrode is configured with the seat core 55. It can be said that it is very stable.
  • the reason why the distance is longer than the detection distance is that the effect of the stray capacitance component between the seat core 55 and the antenna coil 2 generated when the seat core 55 is used is suppressed.
  • one electrode coil 5 is provided.
  • the force wound separately on both sides on the reaction surface Each of the two electrode coils 5 may be wound on one side or the other side on the reaction surface. That is, a two-channel sensor electrode may be constituted by the two electrode coils 5. Further, the front end side and the rear end side of the electrode coil 5 may be fixed by being entangled with the same terminal 6 (or terminal 7). That is, the front end and the rear end of the electrode coil 5 may be short-circuited.
  • the number of turns of the electrode coil 5 in ⁇ ⁇ 2, No. 4 does not necessarily have to be 4 (4 turns).
  • the number of turns of the electrode coil 5 in No. 2 and No. 4 may be two or three, or may be five or more.
  • the bobbin 3 includes four winding protrusions 3c formed at predetermined intervals in the X direction.
  • the number of the winding protrusions 3c included in the bobbin 3 may be two, three, or five or more.
  • one winding protrusion 3c having a wide width in the X direction may be formed, and the electrode coil 5 may be wound around this one winding protrusion 3c.
  • each winding projection 3c includes two electrode coil winding portions 3b formed at a predetermined interval in the Y direction.
  • each winding projection 3c may include three or more electrode coil winding portions 3b formed at a predetermined interval in the Y direction, or one electrode coil winding. It is equipped with only the turning part 3b!
  • the antenna coil 2 is energized using the antenna driving unit 26 configured by connecting the n-channel FET 32 and the p-channel FET 33 in series.
  • the antenna driving unit 26 configured by connecting the n-channel FET 32 and the p-channel FET 33 in series.
  • an antenna drive unit 36 which is a so-called full bridge circuit used with two n-channel type FETs 32 and two p-channel type FETs 33 is provided. It may be used to energize the antenna coil 2.
  • the gates of the n-channel FET 32 and the p-channel FET 33 are connected to the drive control unit 27, and the drains of the n-channel FET 32 and the P-channel FET 33 are connected to the end of the antenna coil 2. Yes.
  • the source of the n-channel FET 32 is connected to an in-vehicle battery (not shown), and the source of the p-channel FET 33 is grounded!
  • the antenna drive unit 36 When the antenna drive unit 36 is used, at least one of the two p-channel FETs 33 is used. If either one is turned on and the antenna coil 2 is grounded, the door 30 or the like can be changed based on only the change in the state of the Z1 direction around which the electrode coil 5 is wound. A predetermined operation target can be operated. On the other hand, if the two p-channel FET33s are both turned off and the antenna coil 2 is not grounded, the state change on the Z1 direction side where the electrode coil 5 is wound and the electrode coil 5 is wound. Based on the state change on the Z2 direction side that has not been performed, it becomes possible to operate a predetermined operation object.
  • one end side of the electrode coil 5 is fixed to the terminal 6 and the other end side is fixed to the terminal 7.
  • a resin terminal protrusion
  • one end side of the electrode coil 5 may be fixed to the resin terminal
  • the other end side may be fixed to the terminal 11.
  • the terminals 6 and 7 can be omitted, and the configuration of the antenna device 1 can be simplified.
  • the detection unit 28 can be disposed on the terminal 11 side.
  • a plurality of resin terminals are formed so as to protrude outward from the two flat plate portions 3g of the bobbin 3 in the Y direction.
  • the use example of the antenna device 1 is described by taking an electronic key system for automobiles as an example.
  • the antenna device 1 may be used for an electronic key system for homes other than automobiles. good.
  • the approach of a user from the front side of a residential door may be detected by the electrode coiner 5, and the door may be opened and closed using the antenna device 1.
  • the antenna device 1 can be used for systems other than the electronic key system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Aerials (AREA)
  • Lock And Its Accessories (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Support Of Aerials (AREA)

Abstract

La présente invention concerne une unité d'antenne (1) comprenant une bobine d'antenne (2) pour réaliser au moins la réception et la transmission d'un signal électromagnétique, une bobine (3) autour de laquelle la bobine d'antenne (2) est enroulée, un noyau (4) intégré dans la bobine (3), et une bobine (5) pour l'électrode de détection enroulée autour de la bobine (3) afin de détecter un changement d'état prédéterminé sur la base d'une variation de capacité. La bobine (3) comprend une partie d'enroulement de la bobine d'antenne (3a) pour l'enroulement de la bobine d'antenne (2), et une partie d'enroulement de la bobine de l'électrode de détection (3b) faisant saillie dans une direction depuis la partie d'enroulement de la bobine d'antenne (3a) pour l'enroulement de la bobine de l'électrode de détection (5).
PCT/JP2007/071372 2006-11-08 2007-11-02 Unité d'antenne WO2008056601A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2008543051A JPWO2008056601A1 (ja) 2006-11-08 2007-11-02 アンテナ装置
EP07831106.5A EP2093833B1 (fr) 2006-11-08 2007-11-02 Unité d'antenne
CN200780039013.8A CN101529654B (zh) 2006-11-08 2007-11-02 天线装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-302322 2006-11-08
JP2006302322 2006-11-08

Publications (1)

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WO2008056601A1 true WO2008056601A1 (fr) 2008-05-15

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EP (1) EP2093833B1 (fr)
JP (1) JPWO2008056601A1 (fr)
CN (1) CN101529654B (fr)
WO (1) WO2008056601A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010016549A (ja) * 2008-07-02 2010-01-21 Sumida Corporation アンテナ装置
JP2012080159A (ja) * 2010-09-30 2012-04-19 Hitachi Metals Ltd アンテナ部材及び低周波アンテナ
JP2015025798A (ja) * 2013-07-29 2015-02-05 國立臺北科技大學 ドアハンドル用検出装置
WO2015107834A1 (fr) * 2014-01-20 2015-07-23 株式会社村田製作所 Composant d'antenne
JP2016066728A (ja) * 2014-09-25 2016-04-28 アイシン精機株式会社 バーアンテナ用のボビン、及び、このボビンを備えるバーアンテナ
JP2016197802A (ja) * 2015-04-03 2016-11-24 東京パーツ工業株式会社 Ｒｆタグ用アンテナ及びｒｆタグ
JP2017192042A (ja) * 2016-04-13 2017-10-19 スミダコーポレーション株式会社 アンテナ装置およびアンテナ装置の製造方法

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JP5161901B2 (ja) * 2010-02-15 2013-03-13 スミダコーポレーション株式会社 アンテナコイル
JP2014107691A (ja) * 2012-11-27 2014-06-09 Tokai Rika Co Ltd アンテナ装置
JP2014107692A (ja) * 2012-11-27 2014-06-09 Tokai Rika Co Ltd アンテナ装置
JP6229305B2 (ja) * 2013-05-17 2017-11-15 スミダコーポレーション株式会社 アンテナ装置およびアンテナ装置の製造方法
US9768509B2 (en) * 2013-08-09 2017-09-19 Sumida Corporation Antenna coil component, antenna unit, and method of manufacturing the antenna coil component
DE102016010561A1 (de) * 2016-08-31 2018-03-01 Huf Hülsbeck & Fürst Gmbh & Co. Kg Kraftfahrzeugtürgriffanordnung mit Antenne
CN106711592A (zh) * 2017-03-17 2017-05-24 吉林省亿丰无线电技术股份有限公司 一种无线电信号转换装置

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JP2001297918A (ja) * 2000-04-11 2001-10-26 Mitsubishi Electric Corp コイルアンテナおよび携帯通信機
JP2003092509A (ja) * 2001-07-13 2003-03-28 Sumida Corporation アンテナコイル
JP2003166369A (ja) 2001-11-29 2003-06-13 Aisin Seiki Co Ltd ドア開閉装置
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010016549A (ja) * 2008-07-02 2010-01-21 Sumida Corporation アンテナ装置
JP2012080159A (ja) * 2010-09-30 2012-04-19 Hitachi Metals Ltd アンテナ部材及び低周波アンテナ
JP2015025798A (ja) * 2013-07-29 2015-02-05 國立臺北科技大學 ドアハンドル用検出装置
WO2015107834A1 (fr) * 2014-01-20 2015-07-23 株式会社村田製作所 Composant d'antenne
JPWO2015107834A1 (ja) * 2014-01-20 2017-03-23 株式会社村田製作所 アンテナ部品
US10038242B2 (en) 2014-01-20 2018-07-31 Murata Manufacturing Co., Ltd. Antenna component
JP2016066728A (ja) * 2014-09-25 2016-04-28 アイシン精機株式会社 バーアンテナ用のボビン、及び、このボビンを備えるバーアンテナ
JP2016197802A (ja) * 2015-04-03 2016-11-24 東京パーツ工業株式会社 Ｒｆタグ用アンテナ及びｒｆタグ
JP2017192042A (ja) * 2016-04-13 2017-10-19 スミダコーポレーション株式会社 アンテナ装置およびアンテナ装置の製造方法

Also Published As

Publication number Publication date
CN101529654A (zh) 2009-09-09
EP2093833A1 (fr) 2009-08-26
EP2093833A4 (fr) 2013-07-10
EP2093833B1 (fr) 2014-05-07
JPWO2008056601A1 (ja) 2010-02-25
CN101529654B (zh) 2013-03-20

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