JP2009194796A - Portable machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable an engine to be activated through simple handling even when the battery of a portable machine runs out, regarding portable machines used for door locking/unlocking systems and immobilizers of vehicles. <P>SOLUTION: The portable machine is characterized in that two antenna coils having center shafts around which coils are wound in two orthogonal axial directions, are integrally formed and mounted on a printed circuit board constituting the portable machine and one of the antenna coils is wound around a holder holding the substrate. The portable machine can be provided which is easily handled by facilitating operation for activating an engine when a driver places the portable machine close to the vehicle for activating the engine, when capacitance of a battery does not sufficiently remain. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable device used for a vehicle door locking / unlocking system and an immobilizer.

  2. Description of the Related Art In recent years, vehicle door locking / unlocking systems that unlock or lock a vehicle door simply by approaching or moving away from the vehicle while the driver is carrying the portable device have been rapidly spreading.

  In addition, a dedicated small communication circuit is embedded in the dedicated key, and when the driver tries to start the engine by inserting the dedicated key into the key cylinder, this communication circuit wirelessly communicates, so that the communication circuit becomes There is a system called a so-called immobilizer that allows the engine to be started by collating a unique authentication code with a vehicle authentication code.

  Here, it is convenient if the engine can be started without using the key even after boarding the vehicle, so the engine is started in the car using a portable device instead of the dedicated key used for the immobilizer. A system that integrates an immobilizer and a vehicle door locking and unlocking system that allows the engine to be activated by checking the portable device authentication code against the vehicle authentication code when the push switch is pressed Is appearing.

  A portable device used in such a vehicle door locking / unlocking system integrated with such a conventional immobilizer will be described with reference to FIGS.

  FIG. 7 is an exploded perspective view of a conventional portable device, in which 4 is a circuit cover made of insulating resin, and 5 is a mounting substrate on which a plurality of wiring patterns (not shown) are formed on the upper and lower surfaces. The circuit cover 4 and the mounting substrate 5 are combined so that the switch 11 mounted on the upper surface of the substrate 5 protrudes from the hole 4 </ b> A provided in the circuit cover 4.

  Further, a transmitting antenna 12 for outputting a transmission signal is provided on the upper surface of the mounting substrate 5, and a triaxial antenna element 14 in which three sets of wound coils are sealed with resin on the lower surface; An electrode 13 for holding the battery is provided.

  The internal structure of the triaxial antenna element 14 will be described with reference to FIG.

  Here, 15A is a rectangular parallelepiped made of a magnetic material, and a copper wire coated with an insulating film of 15B is wound around this to form an antenna coil 14A, and the coil of the antenna coil 14A is wound. The central axis is in the X-axis direction which is the front-rear direction in the drawing.

  14B is an antenna coil formed by winding a metal wire 15D such as copper covered with an insulating film around a rectangular parallelepiped 15C made of a magnetic material, like 14A, and a central axis around which the antenna coil is wound. Is the Y-axis direction in the left-right direction in the drawing orthogonal to the X-axis.

  Further, 14C is an antenna coil in which a rectangular parallelepiped 15E made of a magnetic material is wound with a metal wire 15F such as copper coated with an insulating film, and the central axis around which the antenna coil is wound is the X axis. The Z-axis direction in the vertical direction in the drawing is orthogonal to the Y-axis.

  Both ends of the wound metal wires of the antenna coils 14A, 14B, 14C are connected to terminals 14D, 14E, 14F, 14G, 14H, 14I exposed to the outside of the triaxial antenna coil 14, respectively. Further, the triaxial antenna element 14 is formed by being integrally sealed with resin.

  In FIG. 7, 6 is an insulating resin holder, 7 is a battery, the mounting substrate 5 is sandwiched between the circuit cover 4 and the holder 6, and the triaxial antenna element 14 is inserted into the hole 6 </ b> A provided in the holder 6. After the combination, the battery 7 is inserted from below through the hole 6B provided in the holder 6, and the circuit unit 9 is configured.

  Reference numeral 8 denotes a bottom case made of an insulating resin, in which a circuit unit 9 is combined with a recess 8A provided inside, and the circuit unit 9 is covered from above with a protective cover 3 made of silicone or the like.

  Further, the push button indicated by 2 is placed on the protective cover 3 above the switch 11 mounted on the mounting substrate 5, and the upper surface thereof is exposed from the button hole 1A of the upper case made of insulating resin indicated by 1. The portable device 20 is configured by being combined between the upper case 1 and the lower case 8.

  In the above configuration, when the driver carrying the portable device 20 approaches the vehicle, the control device for the vehicle door locking / unlocking system installed in the vehicle intermittently receives a signal for confirming the presence of the portable device. The portable device that has received the transmission signal via the triaxial antenna element 14 determines whether or not the received signal is a normal signal, and then transmits a signal for unlocking the vehicle door. The vehicle is unlocked after determining whether or not the received signal is a legitimate signal by the control device for the vehicle door locking and unlocking system that has transmitted and received this signal.

  Next, the control when starting the engine when the driver carrying the portable device 20 gets on the vehicle will be described with reference to FIG.

  First, FIG. 9A is a diagram showing the system operation when the battery of the portable device has a sufficient capacity and the battery 7 can supply a voltage sufficient to drive the circuit in the portable device. is there.

  When the driver depresses the push switch on the driver's seat of the vehicle indicated by 16, the control device for the vehicle door locking / unlocking system indicated by 17 disposed in the vehicle is the same as when approaching the vehicle described above. Transmits a signal for confirming the presence of the portable device via the transmission antenna indicated by 18A, and the portable device 20 that has received the signal transmits a signal for allowing the engine to be activated via the transmission antenna 12.

  The signal from the portable device is received by the control device 17 for the vehicle door locking / unlocking system via the receiving antenna 18B, and is connected to the control device 17 for the vehicle door locking / unlocking system. When the control device 17 for the vehicle door locking / unlocking system sends a signal permitting engine start to the control device 19, the engine is started.

  On the other hand, FIG. 9B is a diagram showing the system operation when the battery of the portable device does not have sufficient capacity and the battery 7 cannot drive the circuit in the portable device.

  First, when the driver depresses the push switch 16 provided on the instrument panel of the vehicle, the control device 17 for the vehicle door locking / unlocking system disposed in the vehicle is the same as when approaching the vehicle described above. The signal for confirming the presence of the portable device is transmitted through the transmission antenna indicated by 18A as in FIG. 9A, but at this time, the portable device 20 does not have sufficient battery capacity, A signal cannot be output via the antenna 12.

  Here, the control device 17 for the vehicle door locking / unlocking system that has determined that there is no response signal from the portable device is that there is no response from the portable device to the connected control device 19 for engine control. Send a signal indicating.

  Next, the control device 19 for engine control tries to communicate with the portable device 20 via the coil 16 </ b> A on the outer periphery of the push switch 16.

  Here, when the portable device 20 is brought close to the push switch 16 so that the Z-axis direction of the portable device is directed, the coil 16A on the outer periphery of the push switch 16 and the Z-axis direction of the three-axis antenna element of the portable device 20 An electromotive force is generated in the portable device 20 by electromagnetic coupling with an antenna coil having a central axis around which the coil is wound.

  Since the circuit of the portable device is configured such that an antenna having a central axis in which a coil is wound in the Z-axis direction can supply power to the power supply circuit, the portable device 20 is connected in parallel to the pressing surface of the push switch 16. When installed, the circuit of the portable device is activated with the received power received from the antenna coil, receives the signal TI transmitted via the coil 16A on the outer periphery of the push switch, and permits the engine to be activated from the same antenna coil. The signal TK can be transmitted.

  And the control apparatus 19 for engine control which received the signal via the coil 16A of the outer periphery of the push switch 16 performs control which starts an engine.

  The communicable distance between the outer peripheral coil 16 </ b> A of the push switch 16 and the portable device 20 is about 20 mm, and the driver supports the Z-axis direction of the portable device 20 in the direction of the push switch 16. It is necessary to perform an operation of pressing the push switch 16.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2004-308166 A

  However, in the above-described conventional portable device, when the battery capacity does not remain sufficiently, the engine is started, and when the driver tries to press the push switch for starting the engine, the outer periphery of the push switch in the vehicle Since the communicable distance between the coil and the portable device is as short as about 20 mm, there is a problem that an erroneous operation is likely to occur and is complicated.

  The present invention solves such a conventional problem, and widens the space for moving a finger by setting the communicable distance between the coil around the push switch in the vehicle and the portable device to be 50 to 70 mm. An object of the present invention is to provide a portable device that can start an engine without an erroneous operation when a portable device is brought close to a coil around an outer periphery of a push switch in a vehicle and the push switch is pressed.

  In order to achieve the above object, the present invention has the following configuration.

  The invention according to claim 1 of the present invention holds three antenna coils having three axial directions in which the central axes around which the coils are wound are orthogonal, a mounting board on which the antenna coil is mounted, and the board. A portable device that has a holder, receives a signal from a control device mounted on a vehicle, and returns a response signal, and has two antenna coils in which the central axes around which the coils are wound are perpendicular to each other. The portable device is characterized in that it is integrally molded and mounted on a printed circuit board constituting the portable device, and one antenna coil is wound around a holder for holding the substrate. .

  As a result, even when the battery capacity is not sufficiently remaining, even when trying to start the engine, it is possible to extend the communicable distance between the coil around the push switch and the portable device. When the portable device is brought closer, the engine can be started without erroneous operation without adjusting the position and direction of the portable device, and it is possible to provide a portable device that is easy to handle.

  As described above, according to the present invention, even when attempting to start the engine when the battery capacity is not sufficient, the engine is started without erroneous operation when the portable device is brought close to the vehicle antenna. The advantageous effect that it becomes possible is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

(Embodiment)
FIG. 1 is an exploded perspective view of a portable device according to an embodiment of the present invention. In FIG. On the mounting board, the circuit cover 4 and the mounting board 25 are combined so that the switch 11 mounted on the upper surface of the mounting board 25 protrudes from the hole 4 </ b> A provided in the circuit cover 4.

  Further, on the upper surface of the mounting substrate 25, there is provided a control unit 28 configured by a semiconductor element such as a transmitting antenna 12 for outputting a transmission signal and an IC (Integrated Circuit) for determining the content of the reception signal, and the lower surface. Is similar to the prior art in that the battery holding electrode 13 is provided, but a two-axis antenna element 27 in which two sets of wound coils are sealed with resin, a through hole 25A, The difference is that 25B is provided.

  The internal structure of the biaxial antenna element 27 will be described with reference to FIG.

  Here, a metal wire 31B in which a film made of an insulating material such as polyurethane or polyester is coated on the surface of a conductive material such as copper is wound around a rectangular parallelepiped 31A made of a magnetic material such as ferrite. The central axis around which the coil is wound in the antenna coil 31 is the X-axis direction which is the front-rear direction in the drawing.

  In addition, the antenna coil 32 is configured by winding a metal wire 32B in which an insulating material is coated on the surface of a conductive material such as copper around a rectangular parallelepiped 32A made of a magnetic material such as ferrite. The central axis around which the coil is wound is the Y-axis direction in the horizontal direction in the drawing orthogonal to the X-axis.

  Both ends of the wound copper wires of the antenna coils 31 and 32 are connected to terminals 27A, 27B, or 27C, 27D exposed to the outside of the biaxial antenna element 27, respectively, and further integrated with resin. The biaxial antenna element 27 is formed by being sealed.

  Here, the antenna coil 31 and the antenna coil 32 constituting the biaxial antenna element 27 are configured such that the central axis in the winding direction is orthogonal in the XY plane.

  Therefore, even if the biaxial antenna element 27 is mounted with a slight inclination, the relationship of complementing the direction of the XY axis plane that cannot be received by the antenna coil 31 with the antenna coil 32 does not change. Radio waves can be received with uniform sensitivity in any direction.

  The biaxial antenna element 27 is mounted near the right end of the lower surface of the mounting substrate 25 in the side view of the mounting substrate 25 shown in FIG. 3, and the battery electrode 13 is mounted on the lower surface. 11 and a control unit 28 are provided.

  In the top view of the mounting board shown in FIG. 4, the wirings 25 </ b> C and 25 </ b> D have one end connected to the through holes 25 </ b> A and 25 </ b> B provided on the mounting board 25 and the other end connected to the control unit 28. The capacitor element 35 and the resistance element 36 are mounted so as to bridge the wirings 25C and 25D.

  Next, other components constituting the circuit unit 30 will be described. In the perspective view of the holder 29 shown in FIG. 5A, the holder 29 is substantially rectangular in a top view and has a wall surface on the outer edge, and has a hole 29D. 29E is provided on the bottom surface of the holder 29 in the same manner as in the prior art, but has a metal conductor terminal 29A, 29B made of copper or the like, and a groove 29C provided around the outer wall. This is different from the prior art.

  As shown in FIG. 5B, a metal wire in which a film made of an insulating material such as polyurethane or polyester is coated on the surface of a wire material of a conductive material such as copper is wound around the holder 29 as shown in FIG. Both ends of the metal wire of the antenna coil 37 are connected to terminals 29A and 29B provided on the holder 29.

  When the holder 29 is combined with the mounting board 25, the terminals 29A are press-fitted into the through holes 26A and the terminals 29B are press-fitted into the through holes 26B, so that the wirings 26C and 26D provided on the upper surface of the mounting board 25 and the holder 29 The antenna coil 37 wound around 29 is electrically connected.

  Therefore, an antenna is formed in which the central axis of the spiral formed by winding the coil in the Z-axis direction by the antenna coil 37, the capacitor element 35 mounted on the mounting substrate, and the resistance element 36 is in the Z-axis direction. The

  That is, since the antenna coils 31 and 32 having a central axis around which the coil is wound in the X-axis direction and the Y-axis direction are integrally formed inside the biaxial antenna element 27, the coil diameter cannot be secured sufficiently large. On the other hand, since the antenna coil 37 having the central axis around which the coil is wound in the Z-axis direction is wound in the groove 29C provided in the holder 29, the coil diameter can be secured large. This is advantageous in receiving radio waves from the Z-axis direction.

  1, the circuit cover 4 is made of an insulating resin, and has two switch holes 4A on the inside and a total of five claws 4B in three directions on the outer periphery. This is the same as the conventional technology.

  In this circuit cover 4, the upper surface of the switch 11 of the mounting board 25 protrudes from the switch hole 4 </ b> A of the circuit cover 4, and the claw 4 </ b> B of the circuit cover 4 is inserted into the hole 29 </ b> F provided on the wall surface of the outer edge of the holder 29. The circuit unit 30 is configured by inserting and combining the biaxial antenna element 27 into the hole 29D provided in the holder 29 and then inserting the battery 7 from below through the hole 29E provided in the holder 29. Is done.

  This circuit unit 30 is combined with a recess 8A provided inside the bottom case 8 made of insulating resin, as in the prior art, and further, the circuit unit 30 is mounted from the top with a protective cover 3 made of silicone or the like. Covered.

  And the portable device 40 is comprised combining the upper surface case 1 and the lower surface case 8 so that the upper surface of the button 2 may be exposed from the button hole 1A of the upper surface case 1 made of insulating resin.

  Here, since the lower surface of the protective cover 3 is in close contact with the lower surface case 8 and waterproofs the circuit unit 30, an antenna in which water droplets that have entered from the button hole 1 A are wound around the outer periphery of the holder 29 of the circuit unit 30. It does not adhere to the coil 37, and the entire circuit unit 30 can be waterproofed.

  In the above configuration, when the driver carrying the portable device 40 approaches the vehicle, the control device for the vehicle door locking / unlocking system installed in the vehicle is intermittently a signal for confirming the presence of the portable device. Is transmitted with radio waves having a frequency of 125 kHz, and the portable device that has received this transmission signal via the biaxial antenna element 27 or the antenna coil 37 provided in the holder, is the received signal a legitimate signal? After determining whether or not the control unit 28 determines, a signal for unlocking the vehicle door is transmitted via the transmitting antenna 12 by a radio wave having a frequency of 315 MHz, and the signal for the vehicle door unlocking system that has received this signal is transmitted. When the control device determines that the received signal is a regular signal, the vehicle door is unlocked.

  At this time, since the portable device carried by the driver must be able to unlock the door regardless of the direction in which the portable device is carried, the portable device has the X axis, the Y axis, and the Z axis. The antenna coil having the central axis of the coil winding is provided as the biaxial antenna element 27 or the antenna coil 37 provided on the holder, and can receive any wave from any direction. .

  Next, the control when starting the engine when the driver carrying the portable device 40 gets on the vehicle will be described with reference to FIG.

  FIG. 6A is a diagram showing the system operation when the battery of the portable device has a sufficient capacity and the battery can supply a voltage sufficient to drive a circuit in the portable device.

  First, when the driver depresses a push switch provided on the instrument panel of the vehicle indicated by 16, the control device for the vehicle door locking / unlocking system disposed in the vehicle is the same as when approaching the vehicle described above. 17 transmits a signal for confirming the presence of the portable device via a transmission antenna 18A as a radio wave of 125 kHz, and the portable device 40 that receives the signal transmits the signal via the biaxial antenna element 27 or the antenna coil 37 provided in the holder. After determining whether or not the received signal is a regular signal, a signal for permitting the engine to start is transmitted via a transmission antenna 12 by a radio wave of 315 MHz.

  The signal from the portable device is received by the control device 17 for the vehicle door locking / unlocking system via the receiving antenna 18B, and after determining whether or not it is a legitimate signal, the vehicle door locking / unlocking system When the control device 17 for the vehicle door locking / unlocking system sends a signal for permitting the engine to start to the control device 19 for engine control connected to the control device 17 for the engine, the engine is started.

  Next, FIG. 6B is a diagram showing a system operation when the battery 7 of the portable device does not have sufficient capacity and the battery 7 cannot drive the circuit in the portable device.

  First, when the driver depresses the push switch 16 provided on the instrument panel of the vehicle, the control device 17 for the vehicle door locking / unlocking system disposed in the vehicle is the same as when approaching the vehicle described above. The signal for confirming the presence of the portable device is transmitted by the radio wave of 125 kHz via the transmitting antenna indicated by 18A, as in FIG. 6A. At this time, the portable device 40 has a sufficient battery capacity. Therefore, it cannot be determined whether or not the received signal is a regular signal, and the signal cannot be output via the transmission antenna 12.

  Here, the control device 17 for the vehicle door locking / unlocking system determines that there is no response signal from the portable device, and controls the engine control connected to the control device 17 for the vehicle door locking / unlocking system. A signal indicating that there is no response from the portable device is sent to the control device 19.

  Next, the control device 19 for engine control transmits a signal TI with a radio wave having a frequency of 125 kHz via the coil 16A on the outer periphery of the push switch 16, and tries to communicate with the portable device 40.

  Here, when the Z axis direction of the portable device 40 is arranged with respect to the pressing surface of the push switch 16, the control unit 28 controls only when receiving power from the antenna coil 37 corresponding to the Z axis direction. Since the unit 28 can be activated, an electromotive force is generated in the portable device 40 by electromagnetically coupling the coil 16A on the outer periphery of the push switch 16 and the antenna coil 37 provided in the holder of the portable device 40. To do.

  Further, since the antenna coil 37 is configured to have a larger diameter than the antenna coil in the conventional triaxial antenna element, the electromotive force is increased, that is, the communication distance between the coil 16A on the outer periphery of the push switch 16 and the portable device 40 is increased. I can do it.

  Then, the control unit 28 activated by the received power determines whether or not the received signal is a regular signal, and if it is a regular signal, transmits a signal permitting engine activation from the same antenna coil 37 using radio waves having a frequency of 125 kHz. can do.

  And the control apparatus 19 for engine control which received the signal via the coil 16A of the outer periphery of the push switch 16 performs control which starts an engine.

  That is, when the signal TI transmitted from the coil 16A on the outer periphery of the push switch 16 is received, the received power generated by the received signal in the antenna coil 37 is 2 of the area formed inside the coil if the radio wave environment is the same. Since it is proportional to the power, for example, an antenna coil having a diameter of 10 mm is conventionally formed on the substrate inside the triaxial antenna element, and if the antenna coil 37 of the present invention is approximately elliptical of 54 mm × 24 mm, reception is possible. Since electric power is proportional to the square of the area, it is about 200 times.

  This corresponds to about 13 times the reception intensity caused by the received signal. When converted to an increase in communication distance, the communication distance is proportional to the 1/3 power of the reception intensity, so it increases by about 2.5 times. It corresponds to.

  Thus, according to the present embodiment, when the battery capacity does not remain sufficiently, when trying to start the engine, it is possible to lengthen the communicable distance between the portable device and the vehicle-side antenna, As a result, even when the battery capacity of the portable device is lost, when the driver brings the portable device close to the antenna on the vehicle side, the engine can be started without erroneous operation, and a portable device that is easy to handle is provided. It can be.

  The portable device according to the present invention can start the engine with simple handling even when the capacity of the battery runs out, and is useful for a vehicle door locking / unlocking system, an immobilizer, and the like.

The exploded perspective view of the portable machine by an embodiment of the invention The perspective view which shows the internal structure of a biaxial antenna element Side view of mounting board Top view of mounting board Perspective view of holder Diagram showing system operation at engine startup Exploded perspective view of a conventional portable device The perspective view which shows the internal structure of a triaxial antenna element Diagram showing system operation at engine startup

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper surface case 2 Button 3 Protection cover 4 Circuit cover 4A Hole 4B Claw 7 Battery 8 Lower surface case 8A Depression 11 Switch 12 Transmission antenna 13 Battery electrode 25 Mounting board 25A, 25B Through-hole 25C, 25D Wiring 27 Biaxial antenna element 27A, 27B , 27C, 27D terminal 28 control unit 29 holder 29A, 29B terminal 29C groove 29D, 29E, 29F hole 30 circuit unit 31, 32 antenna coil 31A, 32A rectangular parallelepiped 31B, 32B metal wire 35 capacitor element 36 resistor element 37 antenna coil 40 portable Machine

Claims (1)

A control device mounted on a vehicle having three antenna coils in which three central axes around which the coil is wound are orthogonal, a mounting board on which the antenna coil is mounted, and a holder for holding the board A portable device that receives a signal from the mobile phone and returns a response signal, wherein two antenna coils having a biaxial direction perpendicular to the central axis around which the coil is wound are integrally formed on the printed circuit board constituting the portable device. A portable device, wherein the portable device is mounted and one antenna coil is wound around a holder that holds the substrate.

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