JP2015133605A - antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device having stable connection between a coil wire and a circuit board capable of locking/unlocking a door of a vehicle in a manner of remote control, easy-to-manufacture at low cost.SOLUTION: Ends 17A and 17B of a coil wire 17 is crimped to a crimp member 12 attached to a circuit board 11 by applying voltage to generate heat while pressing a crimping part 12C with upper and lower electrodes 18A and 18B. Coating on an inner core wire is broken and the ends 17A and 17B of the coil wire 17 are crimped and joined to the crimp member 12. With this, stable connection is achieved between the coil wire 17 and the circuit board 11 while coat removal process is eliminated. The antenna device easy-to-manufacture is achieved at low cost.

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.

  FIG. 6 is a perspective view of a conventional antenna device, and FIG. 7 is an exploded perspective view thereof. In FIG. 6, the antenna device 1 includes a coil unit 2, a substrate unit 3 to which the coil unit 2 is fixed, and a coil. A case unit 4 for housing the unit 2 and the substrate unit 3 is provided.

  The coil unit 2 is configured by winding a magnetic body 5 and a coil wire 6 made of a coated metal wire around the magnetic body 5.

  The board unit 3 includes a board 7 of a rigid board, a capacitor 8 mounted on the upper surface, and a resistor 9.

  Both end portions of the coil wire 6 wound around the magnetic body 5 are wound or soldered to a coil locking portion 7A that is formed to protrude on both sides of the substrate 7, and are connected to a wiring pattern (not shown) on the upper surface of the substrate 7. It is connected.

  At this time, the wound portions of both ends of the coil wire 6 are wound in a state where the coating made of an insulating synthetic resin covering the metal wire is removed in advance and the metal wire is exposed.

  Further, the board terminal part 4C extending into the housing part 4B of the case 4A is inserted into the through hole 7B of the board 7 and connected to the wiring pattern of the board 7, and the board unit 3 and the coil unit 2 are housed in the housing part. 4B.

  The antenna unit 1 is configured by covering and sealing the coil unit 2 and the substrate unit 3 with a sealing material (not shown) such as epoxy resin.

  The antenna device 1 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.

  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 1, and the vehicle door is unlocked by the control device, or vice versa. They were locked when they left.

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

JP 2013-102316 A

  However, in the conventional antenna device, since both ends of the coil wire 6 wound around the magnetic body 5 are wound or soldered to the coil locking portions 7A formed to protrude on both sides of the substrate 7, the coil There is a possibility that the contact between the wire 6 and the wiring pattern on the upper surface of the coil locking portion 7A becomes unstable.

  Moreover, after removing the film of the winding part of the both ends of the coil wire 6 previously, it was necessary to wind or solder, and production was complicated and time-consuming.

  An object of the present invention is to solve such problems, and an object of the present invention is to provide an antenna device in which the connection between a coil wire and a substrate is more stable, production is simple, and inexpensive.

  In order to achieve the above object, according to the present invention, an antenna device is configured by mounting a crimping member made of a conductive metal on a substrate and crimping an end of a coil wire to the crimping member.

  According to the present invention, by crimping the end of the coil wire to the conductive metal crimping member mounted on the substrate, the coating of the end of the coil wire is broken and the inner metal wire is crimped to the crimping member. Therefore, the connection between the coil wire and the substrate becomes more stable, and the film removal process is not required, so that an antenna device that can be produced easily and inexpensively can be obtained.

Sectional drawing of the antenna apparatus by one embodiment of this invention Exploded perspective view Perspective view of the antenna unit and case Main part enlarged perspective view of the antenna unit Sectional drawing which shows the crimping process of the crimping | compression-bonding member and coil wire A perspective view of a conventional antenna device Exploded perspective view

  Embodiments of the present invention will be described below with reference to FIGS.

(Embodiment)
FIG. 1 is a sectional view of an antenna device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the antenna device, and FIG. 3 is a perspective view of the antenna unit and case. A substrate made of an insulating resin such as resin, glass epoxy resin, Teflon (registered trademark) substrate, a plurality of wiring patterns (not shown) are formed on the upper surface, and a joint portion 11A is formed on the front portion. A substantially rectangular cutout portion 11B is formed on the front side which is one side of the center.

  Reference numeral 12 denotes a crimping member made of a conductive metal such as a copper alloy. A plurality of leg portions 12B project downward on the left side of the flat base portion 12A, and a substantially columnar crimping portion 12C projects upward on the right side. Yes.

  Reference numeral 13 denotes a connection terminal made of a conductive metal such as a copper alloy. A plurality of leg portions 13B protrude downward from the base portion 13A, and a terminal portion 13C extends from the rear portion.

  Further, the leg portions 12B of the crimping member 12 and the leg portions 13B of the connection terminal 13 are inserted into predetermined mounting holes 11C of the substrate 11 and soldered, respectively, so that the plurality of crimp members 12 and the plurality of connection terminals 13 are connected to the wiring pattern. It is connected to the.

  The crimping member 12 is arranged on the upper surface of the substrate 11 side by side in the longitudinal direction of the cutout portion 11B, and an end including the crimping portion 12C extends into the cutout portion 11B by a predetermined length so that the tip of the crimping member 12 Is arranged inward from the space formed by the notch 11B.

  The board unit 30 is formed by solder mounting electronic components such as a chip-like capacitor 14 and a resistor 15 on the upper surface of the board 11.

  The crimping member 12, the connection terminal 13, the capacitor 14, the resistor 15 and the like are simultaneously soldered by surface mounting and mounted on the substrate 11, so that the substrate unit 30 can be easily manufactured.

  Reference numeral 16 denotes a substantially rectangular parallelepiped magnetic body made of a magnetic material such as ferrite, iron, and permalloy. A stepped portion 16A that is recessed more than the thickness of the substrate 11 on the lower surface of the rear portion, and a part of the lower surface of the stepped portion 16A downward. A protruding projection 16B having a substantially rectangular shape, for example, is formed.

  The joining portion 11A of the substrate 11 is adhered to the step portion 16A with an epoxy adhesive or the like, and the magnetic body 16 and the substrate 11 are fixed.

  At this time, since the holding projection 16B on the lower surface of the stepped portion 16A is inserted into the holding hole 11D formed in the joint portion 11A of the substrate 11 and slightly larger than the outer shape of the holding projection 16B, the substrate 11 and the magnetic body 16 Is more firmly fixed.

  Further, in the vicinity of the rear portion of the magnetic body 16, the crimping members 12 are sequentially arranged in the front-rear direction, and the terminal portion 13 </ b> C is parallel to the longitudinal direction of the magnetic body 16 behind the notch portion 11 </ b> B. The connection terminals 13 are arranged side by side in the left-right direction.

  Reference numeral 17 denotes a coil wire made of a coated metal wire such as an enameled wire having a diameter of 0.1 mm to 0.7 mm and a core wire coated with an insulating synthetic resin such as polyurethane, and is wound around the magnetic body 16. Yes.

  In FIG. 2, the coil wire 17 is illustrated in a cylindrical form in which the state wound around the magnetic body 16 is separated.

  Further, both ends of the coil wire 17 wound around the magnetic body 16 are respectively crimped and connected to the crimping portions 12C of the plurality of crimping members 12.

  Here, the joining method of the coil wire 17 and the crimping | compression-bonding member 12 is demonstrated using the fragmentary enlarged perspective view of FIG. 4, and sectional drawing which shows the crimping | compression-bonding process of FIG.

  An end portion 17A of one end of the coil wire 17 wound around the magnetic body 16 extends from the lower right side of the magnetic body 16, for example, and this end portion 17A is wound around the base portion 12A of the front crimping member 12 a predetermined number of times. Then, as shown to Fig.5 (a), it mounts in the inner side of the crimping | compression-bonding part 12C.

  Next, as shown in FIG. 5B, the lower electrode 18 </ b> B rising from below the notch 11 </ b> B supports the lower surface of the base 12 </ b> A including the crimping part 12 </ b> C.

  Further, the upper electrode 18A descends from above the crimping portion 12C, bends the crimping portion 12C downward, and the crimping portion 12C crushes the end portion 17A of the coil wire 17.

  At this time, a predetermined energization current is passed between the upper electrode 18A and the lower electrode 18B, and the film 17C is melted by Joule heat between the upper and lower electrodes 18A and 18B generated by the energization current as shown in FIG. At the same time, the core wires of the crimping portion 12C and the end portion 17A are thermocompression bonded to join them.

  Further, the end 17B at the other end of the coil wire 17 extends from, for example, the upper left side of the magnetic body 16, and the end 17B is wound around the base 12A of the rear crimping member 12 a predetermined number of times. Similar to the crimping step of the portion 17A, the core wires of the crimping portion 12C and the end portion 17B are thermocompression bonded to join them.

  That is, the end portions 17A and 17B of the coil wire 17 remain covered with the film 17C, and after being placed on the crimping member 12, the upper and lower electrodes 18A and 18B are energized while being crushed by the crimping portion 12C. Since the end portions 17A and 17B are bonded by thermocompression bonding to the crimping portion 12C, it is not necessary to remove the coating as described in the background section, and the coil wire 17 and the substrate unit Connection with 30 can be made simple and reliable.

  As described above, the coil wire 17 is wound around the magnetic body 16 fixed to the substrate unit 30, and the coil wire 17 is connected to the substrate unit 30 via the crimping member 12 to form the antenna unit 31.

  In addition, by extending one end of the crimping member 12 into the planar space in the notch portion 11B, the coil wire 17 and the crimping portion 12C can be crimped and joined in the notch portion 11B and orthogonal to the longitudinal direction of the magnetic body 16. Since the width of the substrate 11 can be made equal to or smaller than the width in the direction, the antenna unit 31 can be made small.

  If the length of the notch 11B in the width direction of the substrate 11 cannot be secured sufficiently, one end of the crimping member 12 projects outward from the notch 11B, and the width of the substrate 11 including the crimping member 12 is magnetic. It may be slightly larger than the width of the body 16.

  Reference numeral 19 denotes a rear case made of an insulating resin such as polybutylene resin (hereinafter referred to as PBT). As shown in FIG. 1, the terminals of the connection terminals 13 attached to the board unit 30 in the through holes 19B of the side walls 19A. The portion 13C is inserted and extends into the space of the left connector connecting portion 19C.

  Further, 20 is a box-shaped front case made of an insulating resin such as PBT and having one front portion opened and the other rear portion closed, and each locking portion 19D formed to protrude from the upper and lower surfaces of the rear case 19, The hole-like engaging portions 20 </ b> A on the upper and lower surfaces of the front case 20 are engaged, and the antenna unit 31 is covered with and stored in the front case 20 and the rear case 19.

  A sealing material 21 made of insulating resin such as epoxy resin is injected into the front and rear cases 19 and 20 through one or more injection holes 19E formed in the side wall 19A, and the antenna unit 31 is sealed. The antenna device 32 is configured by being covered with a stopper 21, fixed in the front and rear cases 19, 20 and sealed.

  For example, if the sealing material 21 is injected from above with the front end of the front case 20 of the antenna device 32 facing downward and the rear portion of the rear case 19 facing upward, the sealing material 21 is conveyed while maintaining that state. During the drying operation, the sealing material 21 hardly overflows or leaks, and handling after the sealing material 21 is filled becomes easy.

  The antenna device 32 configured as described above is arranged inside the door handle of the vehicle and connected to a control device (not shown) arranged in the instrument panel of the vehicle.

  Further, by inserting a vehicle-side connector (not shown) provided at the end of the cable extended from the control device into the connector connection portion 19C of the antenna device 32, the control device and the antenna are connected via the connection terminal 13. Device 32 is connected.

  For example, when a driver carrying a portable device (not shown) approaches the vehicle, communication is performed between the portable device and the antenna device 32, and the vehicle door is unlocked by the control device, or vice versa. When you leave, it locks.

  As described above, according to the present embodiment, heat is generated by energizing the ends 17A and 17B of the coil wire 17 to the crimping member 12 mounted on the substrate 11 while pressing the crimping portion 12C with the upper and lower electrodes 18A and 18B. By crimping and crimping, the ends 17A and 17B of the coil wire 17 are broken and the inner core wire is crimped and joined to the crimping member 12, so that the connection between the coil wire 17 and the substrate 11 is stable. In addition, the removal of the coating is not necessary, and an antenna device that is simple and inexpensive to produce can be realized.

  Further, by forming a notch portion 11B in the substrate 11 and projecting one end of the crimping member 12 into the notch portion 11B, the width of the substrate 11 is set to a width perpendicular to the longitudinal direction of the magnetic body 16. Since it can be within 16 widths or near the width, the antenna device can be made small.

  Further, the injection hole 19E is provided in the side wall 19A of the rear case 19, and the sealing material 21 is filled through the injection hole 19E in a state where the antenna unit 31 is housed in the rear case 19 and the front case 20. When the antenna device 32 is moved after filling, it is difficult for the sealing material 21 to overflow or leak from the front and rear cases 19 and 20, so that the antenna device can be easily handled and transported after filling with the sealing material. Can be a thing.

  The antenna device according to the present invention has an advantageous effect that the connection between the coil wire and the substrate is more stable, the production of the antenna device is simple and inexpensive, and the vehicle door can be locked and unlocked. Useful for communication.

11 Substrate 11A Joint 11B Notch 11C Mounting Hole 11D Holding Hole 12 Crimp Member 12A, 13A Base 12B, 13B Leg 12C Crimp 13 Connection Terminal 13C Terminal 14 Capacitor 15 Resistance 16 Magnetic 16A Step 16B Holding Projection 17 Coil Wire 17A, 17B End portion 17C Film 18A Upper electrode 18B Lower electrode 19 Rear case 19A Side wall 19B Through hole 19C Connector connection portion 19D Locking portion 19E Injection hole 20 Front case 20A Engaging portion 21 Sealing material 30 Substrate unit 31 Antenna unit 32 Antenna device

Claims (3)

A board unit, an antenna unit in which a magnetic body is disposed adjacent to the board unit, a coil wire is wound around the magnetic body and connected to a board of the board unit, and the antenna unit is covered with a case, and the antenna An antenna device in which a connection terminal provided on the unit extends outward from a side wall of the case, wherein a conductive metal crimp member is attached to the substrate, and an end of the coil wire is crimped to the crimp member Antenna device. The antenna device according to claim 1, wherein a notch is formed in the substrate, and the crimping member protrudes into the notch. The antenna device according to claim 1, wherein an injection hole is provided in the side wall of the case, and the case is filled with a sealing material.

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