JP2011120129A - Antenna and antenna device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simply and inexpensively exchangeable antenna for use in locking and releasing of a vehicle door or the like and an antenna device using the antenna. <P>SOLUTION: The antenna 20 includes a magnetic body 11, a coil 12 wound on the magnetic body 11, a pedestal 13 having a fixed capacitive element 14 connected in series with the coil 12, and external terminals 16A, 16B extending from the pedestal 13. The antenna device 30 includes the antenna 20 and a vehicle door handle 21 for fixing the antenna 20. External terminals 16A, 16B of the antenna 20 have locking parts, are held by a holding part provided in the vehicle door handle 21 so that the locking parts can be inserted into or removed from the holding part. Accordingly, the antenna 20 can be easily removed from the vehicle door handle 21 of the antenna device 30. Thus, the antenna which is simply and inexpensively exchangeable, as well as the antenna device using the antenna can be obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an antenna for remotely controlling and unlocking a door of a vehicle by remote control and an antenna device using the antenna.

  In recent years, there are an increasing number of vehicles that remotely control locking and unlocking of vehicle doors via an antenna mounted on the vehicle and an antenna device using the antenna.

  Such a conventional antenna device will be described with reference to FIG.

  FIG. 9 is a perspective view of a conventional antenna device. In FIG. 9, reference numeral 1 denotes a substantially rectangular parallelepiped ferrite magnetic body, and a conductive wire having an insulated surface such as an enamel wire is wound around the outer periphery of the magnetic body 1. Thus, the coil 2 is formed.

  Reference numeral 3 denotes a substrate on which wiring patterns are arranged on the front surface and the back surface. The magnetic body 1 around which the coil 2 is wound is fixed on the front surface of the substrate 3, and both ends of the conductive wire constituting the coil 2 are It is fixed on the substrate 3 by soldering or the like, and the coil 2 is connected to the wiring pattern.

  The capacitor 4 is fixed to a land provided on the substrate by soldering or the like and connected to the wiring pattern, and a series resonance circuit is formed together with the coil 2 similarly connected to the wiring pattern. It is configured.

  The antenna 5 is housed between the vehicle handle 6 and a cover (not shown), and wiring cables 7A and 7B soldered to lands provided on the board are provided on the vehicle handle 6. The antenna device 10 is configured to extend from the back surface of the vehicle handle 6 through the through hole 6A.

  Then, the antenna device 10 configured as described above has a vehicle handle mounted at a predetermined position on the front surface of the vehicle door, is fixed to the vehicle door, and is an electronic circuit (see FIG. (Not shown).

  In the above configuration, when a driver who has a portable device as an external communication means touches the vehicle handle, the electronic circuit transmits a confirmation signal for confirming the presence or absence of the portable device via the antenna device. The portable device that received the signal determines that it is a legitimate signal, transmits an unlock signal for unlocking the door, etc., and unlocks the door.

  In such an antenna device 10, when it is necessary to replace the antenna 5 due to a failure of the antenna 5, for example, the vehicle handle 6 is removed from the vehicle door, and the antenna including the vehicle handle 6 is removed. The entire apparatus 10 was exchanged.

  In other words, not only the antenna 5 is replaced, but the entire antenna device 10 is replaced. Therefore, not only is it necessary to remove the vehicle handle 6 from the vehicle door, but also the replacement parts include the antenna device. The entire 10 was expensive.

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

JP 2002-030844 A

  As described above, in the antenna and the antenna device using the antenna, it is necessary to remove and replace the entire antenna device 10 together with the vehicle handle 6 when a failure occurs in the antenna 5. The parts were expensive.

  The present invention solves such a conventional problem, and an object of the present invention is to provide an antenna that can be replaced easily and inexpensively and an antenna device using the antenna.

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

  The invention according to claim 1 of the present invention includes a magnetic body, a coil wound around the magnetic body, a pedestal to which a capacitor element connected in series with the coil is fixed, and an external terminal extending from the pedestal. One end of the external terminal is directly connected to the coil or the capacitor via the inside of the pedestal, and the other end of the external terminal is provided with a ring terminal portion, so that the replacement work is facilitated and the replacement is easy. It has an effect that an antenna suitable for the antenna device can be obtained.

  The invention according to claim 2 includes a magnetic body, a coil wound around the magnetic body, a pedestal to which a capacitor element connected in series with the coil is fixed, and an external terminal extending from the pedestal. It is equipped with an antenna and a vehicle handle for fixing the antenna, a locking portion is provided on the external terminal of the antenna, and the locking portion is removably held by a holding portion provided on the vehicle door handle so that the antenna can be replaced. However, it has the effect that a simple antenna device can be obtained.

  According to a third aspect of the present invention, in the antenna device according to the second aspect, the locking portion of the antenna is formed by a vertical pin portion extending perpendicularly to the upper surface of the vehicle door handle, and is provided on the vehicle door handle. The holding part is composed of a slit part for holding the vertical pin part, and since it is easier to insert and remove the engaging part and the holding part, an antenna device that can be easily exchanged can be obtained. .

  According to a fourth aspect of the present invention, in the antenna device according to the second aspect, the locking portion of the antenna is formed by a parallel pin portion extending in parallel to the upper surface of the vehicle door handle, and is provided on the vehicle door handle. The holding part is composed of a plate-like holding part provided with a slit for holding the parallel pin part, and the position of the parallel pin part fixed to the slit can be adjusted. In addition to being able to adjust the displacement in the left-right direction and being easy to replace, it has the effect of obtaining an antenna device that can easily manage manufacturing variations in dimensions.

  As described above, according to the present invention, it is possible to obtain an advantageous effect that an antenna that can be exchanged simply and inexpensively and an antenna device using the antenna can be realized.

1 is an exploded perspective view of an antenna according to an embodiment of the present invention. Cross section of the antenna Exploded perspective view of the antenna device Bottom view of the antenna device An exploded perspective view of an antenna device according to another embodiment Enlarged view of the main part of the antenna An exploded perspective view of an antenna device according to another embodiment Enlarged view of the main part of the antenna A perspective view of a conventional antenna device

  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.

  In these drawings, the cross-sectional views are shown by enlarging the dimension in the thickness direction for easy understanding of the configuration.

(Embodiment)
The invention according to claims 1 to 4 of the present invention will be described using the embodiment.

  1 is an exploded perspective view of an antenna according to an embodiment of the present invention. FIG. 2 is a sectional view of the antenna. In FIG. 1, reference numeral 11 denotes a substantially rectangular parallelepiped ferrite magnetic body. A coil 12 is formed by winding a conductive wire whose surface is insulated.

  Reference numeral 13 denotes a pedestal having a substantially U-shaped cross section formed of a heat-resistant insulating resin such as polybutylene terephthalate to which glass fiber is added or a liquid crystal polymer. The magnetic body 11 is formed in a slightly shallow concave portion 13A on the left end surface. And the capacitor element 14 is fixed to the bottom surface of the recess 13B formed deeper than the recess 13A on the top surface.

  Further, conductive metal linear terminals 15A and 15B are extended from the pedestal 13 on both side surfaces which are the front and rear surfaces of the pedestal 13, and both ends of the conductive wire forming the coil 12 are linear terminals 15A and 15B. After being wound around each, it is fixed by soldering.

  Furthermore, external terminals 16A and 16B extend from the right side surface of the pedestal 13, and the external terminals 16A and 16B are provided with two bent portions 161A and 161B that are bent substantially at right angles in a staircase shape, respectively, at the right end. As a locking portion, ring terminal portions 162A and 162B each having a hole in the center are provided.

  Here, the external terminal 16A is electrically connected to one end of the capacitor element 14 through the pedestal 13, and the other end of the capacitor element 14 is electrically connected to the linear terminal 15A through the pedestal 13 so that the coil 12 , The linear terminal 15B passes through the pedestal 13 and connects to the external terminal 16B.

  That is, the coil 12 and the capacitor element 14 are connected in series to form a resonance circuit having a resonance frequency of, for example, 120 kHz or more and 140 kHz or less, and both ends of the resonance circuit are the external terminals 16A and 16B.

  Furthermore, cylindrical terminal covers 17A and 17B made of rubber or insulating resin are attached to the external terminals 16A and 16B.

  An antenna cover 18 made of an insulating resin having an open right side is covered from the left side of the magnetic body 11 and the antenna cover 18 is filled with a thermosetting resin such as an epoxy resin, so that the antenna 20 Is configured.

  Next, FIG. 3 is an exploded perspective view of the antenna device, FIG. 4 is a bottom view thereof, 21 is a substantially box-shaped vehicular door handle with an open top surface, and a plate-like antenna protruding at four locations on the left side of the inner bottom surface. A support portion 21A is provided, and a terminal holding portion 21B surrounded by a plate-like partition wall is provided on the right side of the inner bottom surface.

  In addition, in the terminal holding portion 21B, two cylindrical terminals 22A and 22B having a substantially circular cross section are provided which protrude from the upper surface of the vehicle door handle 21 and serve as a holding portion.

  As shown in the bottom view of FIG. 4, the other ends of the cylindrical terminals 22A and 22B are provided on the lower surface of the vehicle door handle 21 in a connector portion 21C having a substantially square partition wall provided on the lower surface of the vehicle door handle 21. Protrude from.

  Here, the antenna 20 is supported by being sandwiched from the side by the antenna support portion 21A at four locations on the side surface of the antenna cover 18, and the cylindrical terminals 22A and 22B pass through the holes of the ring terminal portions 162A and 162B of the antenna 20. Thus, the ring terminal portions 162A and 162B are press-fitted into the cylindrical terminals 22A and 22B so as to be insertable / removable, and the antenna 20 is fixed to the upper surface of the vehicle door handle 21.

  The relationship between the outer diameter of the cylindrical terminals 22A and 22B and the diameter of the holes of the ring terminal portions 162A and 162B is such that the outer diameter of the cylindrical terminals 22A and 22B is larger than the diameter of the holes in the range of 0 μm to 200 μm. Is more desirable.

  The antenna device 30 is configured by covering a vehicular door handle 21 with a substantially box-shaped handle cover 23 that is open from the lower side and fixed on the upper surface of the vehicle door handle 21 to the antenna 20.

  The antenna device 30 configured in this manner is electrically connected to an electronic circuit (not shown) as internal communication means in the vehicle, and the antenna device 30 is mounted on the door of the vehicle as a door handle. .

  In the above configuration, when the driver who has the portable device as the external communication means approaches or touches the door handle, the electronic circuit transmits a confirmation signal for confirming the presence of the portable device via the antenna device 30 of high frequency. Send by signal.

  Then, the portable device that has received the confirmation signal determines that it is a legitimate signal, transmits an unlock signal for unlocking the door, etc., and unlocks the door.

  Further, when the antenna 20 of the antenna device 30 needs to be replaced due to failure or the like, the operator removes the handle cover 23 on the upper surface of the vehicle door handle 21 to expose the antenna 20.

  Next, the ring terminal portions 162A and 162B are pulled out from the cylindrical terminals 22A and 22B, the antenna support portions 21A at the four side surfaces of the antenna cover 18 are removed, and the antenna 20 is removed from the upper surface of the vehicle door handle 21.

  Further, the operator fixes the new antenna 20 on the upper surface of the vehicle door handle 21 in the reverse procedure, covers the antenna cover 18 on the upper surface of the vehicle door handle 21 from above the antenna 20, and completes the replacement work.

  That is, the operator does not need to replace the antenna device 30 as a whole, and only the antenna 20 needs to be replaced. Therefore, the troublesome work of removing the vehicle door handle from the vehicle door is eliminated, and the antenna 20 can be easily replaced. In addition, the antenna 20 is less expensive than the antenna device 30 as a whole, and can provide inexpensive replacement parts.

  As described above, according to the present embodiment, the magnetic body 11, the coil 12 wound around the magnetic body 11, the pedestal 13 to which the capacitor element 14 connected in series with the coil 12 is fixed, and the pedestal 13 are extended. The external terminals 16A and 16B are provided, and the external terminals 16A and 16B are directly connected to the coil 12 or the capacitor element 14 via the inside of the base 13 and have ring terminal portions 162A and 162B at the other end. Therefore, it is suitable for simple replacement, and an antenna suitable for simple and inexpensive antenna replacement can be provided.

  In addition, a magnetic body 11, a coil 12 wound around the magnetic body 11, a pedestal 13 to which a capacitor element 14 connected in series with the coil 12 is fixed, and external terminals 16A and 16B extending from the pedestal 13 are provided. The antenna 20 and the vehicle handle 21 for fixing the antenna 20 are provided. The external terminals 16A and 16B of the antenna 20 are provided with locking portions, and the locking portions are provided with respect to the holding portion provided on the vehicle door handle 21. Since the antenna unit 30 can be easily removed from the vehicle door handle 21 of the antenna device 30 because it is held by the holding portion so that it can be inserted and removed, an antenna device suitable for exchanging the antenna at a low cost is provided. It can be.

  In the above description, the ring terminal portions 162A and 162B are used as the locking portions of the antenna 20, and the cylindrical terminals 22A and 22B are used as the holding portions on the upper surface of the vehicle door handle 21, but the present invention is not limited thereto. As shown in the exploded perspective view of FIG. 5, as a locking portion of the antenna 31, the L-shaped plate-like vertical pin portions 32 </ b> A and 32 </ b> B whose front ends are bent downward are used as holding portions. A slit portion 331A provided in the terminal holding portion 33A on the upper surface of the vehicle door handle 33 may be used.

  Thereby, since a latching | locking part can be comprised by the vertical pin parts 32A and 32B of a simple structure, an antenna can be comprised more cheaply.

  Further, as shown in the enlarged view of the main part of FIG. 6, for example, if the vertical pin portion 32A is gradually reduced downward to form a narrow end portion 321A, it can be easily inserted into and removed from the slit portion 331A. Furthermore, by providing the convex portion 322A on the surface of the vertical pin portion 32A, the holding in the slit portion 331A can be strengthened.

  In addition, you may provide the narrow end part 321B and the convex part 322B of the shape similar to the narrow end part 321A and convex part 322A which were provided in the plate-like part 32B in the plate-like part 32B.

  Further, as shown in the exploded perspective view of FIG. 7, as another configuration of the locking portion and the holding portion, the locking portion is formed as parallel pin portions 35A and 35B of the antenna 34 extending linearly to the right. The part may project vertically from the terminal holding part 36A on the upper surface of the vehicle door handle 36, and may be configured as plate-like holding parts 37A and 37B provided with slits.

  This makes it possible to adjust the position of the parallel pin portion fixed to the slit, so that the deviation of the antenna fixing position in the left-right direction can be adjusted, and in addition to easy replacement, management of manufacturing variations in dimensions is easy. An antenna device can be obtained.

  Here, the right wall 36B, which is the partition wall of the terminal holding portion 36A on the upper surface of the vehicle door handle, has a parallel pin portion 35A held by the plate-like holding portions 37A and 37B when the antenna is fixed to the vehicle door handle. The upper end of the right wall 36B is provided to be higher than the position of 35B, and even if the ends of the parallel pin portions 35A and 35B move to the left and right when the antenna 34 is fixed to the vehicle door handle 36, It is regulated not to go to the right side of the right wall 36B, and the fixed position of the antenna 34 with respect to the vehicle door handle 36 is ensured.

  In addition, the shape of the slit provided in the vertical terminal portion 37A or 37B is an enlarged view of a main part of FIG. 8, and as shown in FIG. 8A, a circular slit portion 41B is provided below the vertical slit portion 41A. The parallel pin portion 35A or 35B may be held by the circular slit portion 41B via the vertical slit portion 41A.

  Further, as shown in FIG. 8B, a serrated slit portion 42B bent into a V-shape or a W-shape is provided below the vertical slit portion 42A, and the parallel pin portion 35A or 35B is provided at the serrated slit portion 42B. 8C, as shown in FIG. 8C, a circular slit portion 43B is provided below the V-shaped slit 43A that is open upward, and the parallel pin portion 35A or 35B is a circular slit portion 43B. It can also be a structure held by

  Further, in the above description, the resonance frequency of the antenna 20 has been described as an example from 125 kHz to 145 kHz, but it is considered that the resonance frequency of the antenna 20 is desirably 10 kHz to 1 MHz.

  This is because when the resonance frequency of the antenna 20 is less than 10 kHz, it is difficult to reduce the size of the antenna 20 so that the antenna 20 can be disposed on the upper surface of the vehicle door handle 21, and when it exceeds 1 MHz, a high-frequency signal is transmitted. This is because power loss between the holding portion of the vehicle door handle and the locking portion of the antenna is likely to increase.

  An antenna according to the present invention and an antenna device using the antenna have an advantageous effect that a simple and inexpensive exchangeable device can be obtained, and are useful for communication for locking and unlocking a door of a vehicle. is there.

DESCRIPTION OF SYMBOLS 11 Magnetic body 12 Coil 13 Base 13A, 13B Recessed part 14 Capacitor element 15A, 15B Linear terminal 16A, 16B External terminal 161A, 161B Bending part 162A, 162B Ring terminal part 17A, 17B Terminal cover 18 Antenna cover 20 Antenna 21 Vehicle door Handle 21A Antenna support portion 21B Terminal holding portion 21C Connector portion 22A, 22B Cylindrical terminal 23 Handle cover 30 Antenna device

Claims (4)

A magnetic body; a coil wound around the magnetic body; a pedestal to which a capacitor element connected in series with the coil is fixed; and an external terminal extending from the pedestal. An antenna that is directly connected to the coil or the capacitor via the inside of the pedestal and has a ring terminal portion at the other end. An antenna comprising: a magnetic body; a coil wound around the magnetic body; a pedestal to which a capacitor element connected in series with the coil is fixed; and an external terminal extending from the pedestal; and An antenna device comprising: a vehicle handle to be fixed; a locking portion provided on the external terminal of the antenna; and the locking portion held by a holding portion provided on the door handle for the vehicle. The locking portion of the antenna is formed by a vertical pin portion extending perpendicularly to the upper surface of the vehicle door handle, and the holding portion provided on the vehicle door handle is constituted by a slit portion for holding the vertical pin portion. Item 3. The antenna device according to Item 2. The locking portion of the antenna is formed by a parallel pin portion extending parallel to the upper surface of the vehicle door handle, and the holding portion provided on the vehicle door handle is a plate provided with a slit for holding the parallel pin portion. The antenna device according to claim 2, comprising a shape holding portion.

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