JP2013102316A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device having a simple structure.SOLUTION: An antenna device 60 includes: an insertion part 41D which is inserted into a coil unit 21, having a magnetic material 31 and a coil 32 wound around the magnetic material 31, and fixes the coil unit 21; and a printed board where through holes 41C electrically connecting with the coil unit 21 are placed. This structure allows the coil unit 21 to be fixed with the printed board 41 and thus provides the antenna device 60 having a simple structure.

Description

  The present invention relates to an antenna device that remotely locks and unlocks a door of a vehicle.

  In recent years, an increasing number of vehicles perform remote control of door locking / unlocking of vehicle doors via an antenna device mounted on the vehicle, and such an antenna device can be disposed inside the door handle of the vehicle. ing.

  Such a conventional antenna device will be described with reference to FIGS. 4 and 5. FIG.

  FIG. 4 is a cross-sectional view of a conventional antenna device, and FIG. 5 is an exploded perspective view. In FIG. 4, a coil 2 formed of enameled wire or the like is wound around a magnetic body 1 such as ferrite.

  In addition, the magnetic body 1 is inserted and held in the recess 3A at the right end of the terminal block 3 made of insulating resin, and the antenna body 10 is formed from the magnetic body 1, the coil 2, and the terminal block 3, and the right end is closed. The rectangular parallelepiped is inserted into the hollow case 11 from the opening 11A.

  Here, a plate-like connection terminal 12 made of conductive metal is insert-molded in the terminal block 3, and the right end of the connection terminal 12 protrudes from two places on the side surface of the terminal block 3 and both ends of the coil 2 are engaged. Stopped. The left end of the connection terminal 12 extends from the terminal block 3 in the form of two lines.

  Then, the extended connection terminal 12 is passed, and a waterproof ring 13 made of rubber and formed in a ring shape is fitted to the outer periphery of the left end of the terminal block 3, and a cylindrical connector 14 is inserted into the case 11 from the left side. Thus, the antenna device 20 is configured.

  The antenna device 20 configured in this manner is disposed inside the door handle of the vehicle and connected to a control device (not shown) disposed in the instrument panel of the vehicle.

  Here, a vehicle-side connector (not shown) provided at the end of the cable extended from the control device is inserted into the connector 14 of the antenna device 20, whereby the control device and the antenna are connected via the connection terminal 12. A device 20 is connected.

  For example, when a driver or the like carrying a portable device (not shown) approaches the vehicle, communication is performed between the portable device and the antenna device 20, and the vehicle door is unlocked by the control device, or vice versa. When the vehicle is separated from the vehicle, the vehicle door is locked.

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

JP 2008-042237 A

  However, in the conventional antenna device, the terminal block on which the magnetic body is inserted and held needs to be insert-molded with a connection terminal and provided with a recess corresponding to the size of the magnetic body, and the structure is complicated.

  The present invention solves such a conventional problem, and an object thereof is to provide an antenna device having a simple structure.

  In order to achieve the above object, the present invention is particularly electrically connected to a coil unit and an insertion portion for fixing the coil unit by inserting it into a coil unit having a magnetic body and a coil wound around the magnetic body. The antenna device is configured to include a printed circuit board on which the connecting portions are arranged.

  According to the present invention, the insertion part for fixing the coil unit by being inserted into the coil unit having the magnetic body and the coil wound around the magnetic body, and the connection part electrically connected to the coil unit are arranged. An antenna device is configured with a printed circuit board.

  With such a configuration, the coil unit can be fixed using a printed circuit board without a complicated component such as a terminal block in which connection terminals are insert-molded, so that an antenna device having a simple structure can be provided. .

The perspective view of the antenna apparatus by one embodiment of this invention Exploded perspective view of the antenna device Sectional drawing of the coil unit and board unit used for the antenna device Sectional view of a conventional antenna device Exploded perspective view of a conventional antenna device

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

(Embodiment)
1 is a perspective view of an antenna device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a sectional view of a coil unit and a substrate unit.

  In the figure, an antenna device 60 includes a coil unit 21, a substrate unit 22 to which the coil unit 21 is fixed, and a case unit 23 that houses the coil unit 21 and the substrate unit 22.

  Further, the coil unit 21 includes a magnetic body 31 and a coil 32 wound around the magnetic body 31.

  Here, the magnetic body 31 is made of a magnetic material such as ferrite, iron, permalloy or the like and has a substantially rectangular parallelepiped shape, and includes a groove 31A on the lower surface.

  The coil 32 is configured by winding a coated metal wire such as an enameled wire having a diameter of 0.1 mm to 0.7 mm around the magnetic body 31.

  The board unit 22 includes a printed board 41, a capacitor 42, and a resistor 43.

  Here, the printed circuit board 41 is configured by providing a predetermined wiring pattern (not shown) on the upper surface of a rigid substrate such as a glass epoxy substrate, a paper phenol substrate, or a Teflon (registered trademark) substrate. This wiring pattern is provided in a substantially square circuit arrangement portion 41A and a coil locking portion 41B that protrudes squarely in the front-rear direction from the circuit arrangement portion 41A, and is provided with two through holes as an example of a connection portion provided in the circuit arrangement portion 41A. It is electrically connected to the hole 41C. Further, an insertion portion 41D extending from the circuit arrangement portion 41A with a width narrower than that of the circuit arrangement portion 41A is provided on the left side, and the width from the circuit arrangement portion 41A to the insertion portion 41D is reduced to form a step portion 41E. .

  The capacitor 42 is, for example, a chip capacitor having a predetermined electric capacity, and the resistor 43 is, for example, a chip resistor having a predetermined resistance value. And the capacitor | condenser 42 and the resistor 43 are fixed to the upper surface of the circuit arrangement | positioning part 41A by soldering etc., and are electrically connected to the wiring pattern of the upper surface of the circuit arrangement | positioning part 41A.

  Further, the insertion portion 41D is inserted into the groove portion 31A, and both ends of the coil 32 are locked to the coil locking portion 41B. As a result, the right end of the coil unit 21 is in contact with the step portion 41 </ b> E and is fixed to the board unit 22. And the coil 32 latched by the coil latching | locking part 41B is electrically connected to the wiring pattern of the coil latching | locking part 41B upper surface.

  As a result, the coil 32, the capacitor 42, and the resistor 43 constitute a series resonant circuit having two through holes 41C as terminals.

  That is, when the coil unit 21 and the board unit 22 are combined, the resonance frequency can be measured through the two through holes 41C. Therefore, the dimensional variation of the magnetic body 31 of the coil unit 21 and the capacitance variation of the capacitor 42 can be measured. Adjustment or the like can be performed so that the variation of the resonance frequency due to is within a desired range.

  It is also possible to eliminate at least one of the capacitor 42 and the resistor 43 from the upper surface of the circuit arrangement portion 41A, and arrange the eliminated capacitor 42 or resistor 43, for example, in an electronic circuit (not shown) to which the antenna device 60 is connected. However, from the viewpoint of suppressing the frequency variation of the antenna device 60, it is desirable to dispose at least the capacitor 42 in the antenna device 60.

  Next, the case unit 23 will be described. Here, the case unit 23 includes a case 51 and a connection terminal 52.

  The case 51 is made of an insulating resin and includes a connector part 51A and a casing part 51B. The connector portion 51A is substantially cylindrical and extends rightward, and has a protrusion 51C on the upper surface. The casing 51B has a rectangular box shape with an open top surface, includes a recessed storage portion 51F having four side walls 51D and a bottom surface 51E, and is coupled to the left end of the connector portion 51A.

  The connection terminal 52 is made of a conductive metal and is integrally formed with the case 51 by insert molding or the like. Here, the connection terminal 52 includes a connector terminal portion 52A exposed in the inner peripheral wall of the connector portion 51A configured in a cylindrical shape, a flexible portion 52B and a substrate terminal portion 52C exposed in the storage portion 51F. Further, the flexible portion 52B extends from the connector terminal portion 52A and is exposed in the storage portion 51F. Here, the flexible part 52B is exposed from the side wall 51D and is bent downward and leftward. The substrate terminal portion 52C is configured to be bent upward from the flexible portion 52B.

  And while the coil unit 21 is being fixed to the board | substrate unit 22, while being accommodated in the accommodating part 51F, the upper end of the board | substrate terminal part 52C is inserted in the through hole 41C of the printed circuit board 41. FIG. Thereby, the connection terminal 52 is electrically connected to the wiring pattern of the circuit arrangement portion 41A via the through hole 41C.

  Here, the two coil locking portions 41B protruding from the circuit arrangement portion 41A are arranged so as to contact the opposing side walls 51D, respectively, and suppress the swing of the printed circuit board 41.

  Further, since the flexible portion 52B can bend in the longitudinal direction of the storage portion 51F and the width direction perpendicular thereto, the connection terminal 52 can be made through the through hole 41C even if there is a manufacturing variation in the position of the through hole 41C. In contrast, the substrate terminal portion 52C can maintain a stable electrical connection.

  Then, the antenna unit 60 is configured by covering the coil unit 21 and the substrate unit 22 with a sealant (not shown) such as an epoxy resin and sealing the storage unit 51F.

  Here, the antenna device 60 is configured to perform communication at a predetermined resonance frequency. However, the antenna device 60 can cope with a case where the electrical characteristics of the antenna device 60 are changed. Specifically, the change of the electrical characteristics is, for example, changing the resonance frequency or changing the inductance value of the coil unit 21 and the capacitance value of the capacitor 42. The antenna device 60 can cope with changing the electrical characteristics without changing the design of the case unit 23 or the printed circuit board 41.

  For example, when changing the resonance frequency, the inductance value of the coil unit 21 can be changed by changing the dimensions of the magnetic body 31 constituting the coil unit 21 and the number of turns around which the coil 32 is wound around the magnetic body 31. Even in such a case, a gap having a width of 10% or more as compared with the width of the coil unit 21 exists between the coil unit 21 and the side wall 51D. It is possible to cope with changes in the physical characteristics.

  Further, since the insertion portion 41D is inserted into the groove portion 31A, even if the dimensions of the magnetic body 31 are changed, the design of the printed circuit board 41 is not particularly changed unless the width of the groove portion 31A is changed. The coil unit 21 can be fixed to the substrate unit 22.

  The antenna device 60 configured as described above is disposed inside the door handle of the vehicle and is connected to a control device (not shown) disposed in the instrument panel of the vehicle.

  Here, for example, a vehicle-side connector (not shown) provided at an end portion of a cable extended from the control device is inserted into the connector portion 51A of the antenna device 60, whereby the control device is connected via the connection terminal 52. And the antenna device 60 are electrically connected. Note that the vehicle-side connector is locked by the protrusion 51C of the antenna device 60, and the fitting of the vehicle-side connector and the connector portion 51A is maintained even when the antenna device 60 is shaken by vibration or the like during vehicle travel.

  When the antenna device 60 is used, for example, when a driver or the like carrying a portable device (not shown) approaches the vehicle, communication is performed between the portable device and the antenna device 60. The control device connected to 60 unlocks the door of the vehicle. On the other hand, when the driver leaves the vehicle, the door of the vehicle is locked.

  In the above description, the through hole 41C has been described as an example of the connection portion. However, the connection portion only needs to be electrically connectable to the connection terminal 52. For example, a connector or the like may be used.

  If the through hole 41C is used, the connection with the connection terminal 52 may be fixed by soldering, or if the electrical connection can be maintained, the connection terminal 52 is simply inserted into the through hole 41C. But it ’s okay. The inner side surface of the through hole 41C is preferably plated with a conductive metal.

  As a method of locking both ends of the coil 32 to the coil locking portion 41B, the coil 32 may be wound around the coil locking portion 41B, or may be locked by soldering or the like. Moreover, you may provide a dent etc. in the side surface so that the coil 32 may be wound easily.

  As described above, according to the present embodiment, the magnetic unit 31 and the insertion unit 41D that is inserted into the coil unit 21 including the coil 32 wound around the magnetic body 31 and fixes the coil unit 21, and the coil unit 21 are electrically connected. The antenna device 60 is configured by including a printed circuit board on which a connecting portion connected to the antenna is disposed.

  With such a configuration, since the coil unit 21 can be fixed using the printed circuit board 41, the antenna device 60 having a simple structure can be provided.

  Moreover, it becomes possible to comprise a connection part simply by comprising a connection part as a through hole.

  Further, the printed circuit board 41 includes a circuit arrangement portion 41A provided with a connection portion, a coil locking portion 41B protruding from the circuit arrangement portion 41A and locking the coil 32, and protruding from the circuit arrangement portion 41A and inserted into the coil unit 21. An insertion portion 41D is provided, and a step portion 41E is formed at a connection position between the circuit arrangement portion 41A and the insertion portion 41D.

  Thereby, it becomes possible to receive the coil unit 21 by the step part 41E, and it becomes possible to fix the coil unit 21 more stably. Furthermore, since the width of the coil unit 21 can be adjusted by a width corresponding to the width of the step portion 41E, the degree of freedom in designing the width of the magnetic body 31 can be improved.

  In addition, since the groove 31A is provided in the magnetic body 31 and the groove 31A and the insertion portion 41D are fitted, the arrangement of the coil unit 21 is stabilized, and the antenna device 60 that is more resistant to vibration and the like can be provided.

  Further, the storage portion 51F includes a bottom surface 51E and a plurality of side walls 51D, the coil locking portion 41B protrudes in at least two directions across the circuit arrangement portion 41A, and the protruding ends of the coil locking portions 41B abut against different side walls 51D. Therefore, it is possible to provide the antenna device 60 in which the printed circuit board 41 is stably arranged in the storage portion 51F and is more resistant to vibration and the like.

  The connection terminal 52 includes a connector terminal portion 52A exposed in the inner peripheral wall of the connector portion 51A, a flexible portion 52B and a substrate terminal portion 52C exposed in the storage portion 51F, and the substrate terminal portion 52C is formed in the through hole 41C. Since the flexible portion 52B is inserted and configured to be able to bend in the longitudinal direction of the storage portion 51F and the direction orthogonal to the longitudinal direction, the through-hole is provided even if manufacturing variations occur in the position of the through-hole 41C. The board terminal portion 52C can maintain a stable electrical connection to 41C.

  The antenna device according to the present invention has an advantageous effect that an antenna device having a simple configuration can be obtained, and is useful for communication for locking and unlocking a door of a vehicle.

DESCRIPTION OF SYMBOLS 21 Coil unit 22 Board | substrate unit 23 Case unit 31 Magnetic body 31A Groove part 32 Coil 41 Printed circuit board 41A Circuit arrangement part 41B Coil latching part 41C Through hole 41D Insertion part 41E Step part 42 Capacitor 43 Resistance 51 Case 51A Connector part 51B Case part 51C Protrusion 51D Side wall 51E Bottom surface 51F Storage part 52 Connection terminal 52A Connector terminal part 52B Flexible part 52C Substrate terminal part 60 Antenna device

Claims (6)

A coil unit; a substrate unit on which the coil unit is fixed; and a case unit provided with a storage unit in which the coil unit and the substrate unit are stored. The coil unit is attached to the magnetic body and the magnetic body. The substrate unit has a printed circuit board having an insertion portion inserted into the coil unit and fixed to the coil unit, and a connection portion electrically connected to the coil unit; The case unit is an antenna device having a housing part having the housing part, a case having a connector part joined to the housing part, and a connection terminal that is electrically connected to the connection part and configured integrally with the case. The antenna device according to claim 1, wherein the connection portion is a through hole. The printed circuit board includes a circuit arrangement portion provided with the connection portion, a coil locking portion protruding from the circuit arrangement portion and locking the coil, and an insertion portion protruding from the circuit arrangement portion and inserted into the coil unit. The antenna device according to claim 2, further comprising a step portion at a connection position between the circuit arrangement portion and the insertion portion. The antenna device according to claim 3, wherein the magnetic body is provided with a groove portion, and the groove portion and the insertion portion are engaged with each other. The said accommodating part is equipped with a bottom face and several side wall, The said coil latching | locking part protrudes in at least two directions on both sides of the said circuit arrangement | positioning part, The protrusion end of the said coil latching | locking part each contact | abuts a different side wall. Antenna device. The connection terminal includes a connector terminal portion exposed in an inner peripheral wall of the connector portion, a flexible portion and a substrate terminal portion exposed in the storage portion, and the substrate terminal portion is inserted into the through hole, The antenna device according to claim 5, wherein the bending portion is configured to be able to bend in a longitudinal direction of the storage portion and a direction orthogonal to the longitudinal direction.

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