JP2000295017A - Antenna for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna for a automobile provided with a configuration capable of simplifying connecting work due to the reduction of connection work man-hour and preventing a connection failure. SOLUTION: In a helical coil antenna 10 including a circuit board 12 mounted on a base plate 11 in a base casing 13, a BNC connector 16 to which a feeding cord C is connected from the outside of the plate 11 is connected to the plate 11, and a connection terminal 17 which extends in the direction of the connector 16 when the board 12 is located at an attachment position to the plate 11 and whose end part is also connected to the connector 16 in a freely attachable and detachable way is attached to the board 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle antenna, and more particularly, to a structure for feeding power from an antenna element.

[0002]

2. Description of the Related Art Generally, a power supply section is provided between an antenna element and a transmission / reception section, and a transmission / reception signal is transmitted / received via the power supply section. A signal is transmitted from the transmission / reception unit to an output device such as a speaker or a television via a transmission line using a coaxial line or the like. On the other hand, antennas include pole-shaped antennas installed on the roof, A-pillar, or trunk lid of an automobile. In such an antenna, a power supply member for an antenna element is disposed in a case body attached to a vehicle body panel of a vehicle body. ,
It is connected to a transmission / reception circuit on an electrical board provided in the case body. An output device is connected to the transmission / reception circuit via a relay cable using a coaxial cable or the like. The terminal portion of the relay cable is fixed to a bottom plate of the case main body or the like, and the core wire is connected to the output terminal of the electrical board by extending the core wire, and is wired in the so-called case main body.

FIG. 4 is a diagram showing a wiring structure of a helical coil antenna for a vehicle, which is an example of an antenna for a vehicle. In FIG. 4, the helical coil antenna includes a base plate 1, an electric board 2 supported above the base plate 1 with a space therebetween, and a base casing 3 mounted on the base plate 1 to accommodate the electric board 2. And an antenna element 4 whose base end is supported by the base casing 3. The antenna element 4 includes a helical coil 4A and an antenna casing 4B that covers the helical coil 4A.
The mounting bracket 4C attached to the base end of the antenna casing 4B
Is fixed to the base casing 3 by being connected to the power supply fitting 5 mounted on the ceiling of the base casing 3. The connection between the helical coil 4A connected to the mounting bracket 4C and the electrical board 2 connected to the power mounting bracket 5 is performed by the connection between the mounting bracket 4C and the power supply bracket 5 so that power supply is connected. Has become. As shown in the figure, the helical coil antenna has a base plate 1 in a state in which a power supply cord 6 for supplying power to the electrical board 2 is drawn into a vehicle body from a through hole formed in the vehicle body panel BP.
Is fixed on the vehicle body panel BP by being screwed through the packing sheet 7. Here, in the above-mentioned conventional helical coil antenna, the connection between the electric board 2 and the power supply cord 6 is performed by a lead wire 8 wired between the base plate 1 and the electric board 2.

[0004]

However, the structure using the relay cable has the following problems. In other words, the wiring work requires not only manual labor but also work such as soldering and work such as removal of excess solder after soldering, which requires a large amount of work time. In addition, if a soldering failure occurs, it may cause a connection failure, which may impair the reliability of the wiring connection.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automobile antenna having a structure capable of simplifying the connection work by reducing the number of connection work steps and preventing poor connection in view of the above-mentioned problems in the conventional automobile antenna. .

[0006]

In order to achieve this object, an invention according to claim 1 is directed to an automobile antenna having a built-in electrical board mounted on a board of the casing body in the casing body. A connector member to which a power supply cord is connected from the outside of the board is attached to the board of the casing main body, and the electric board extends in the direction of the connector member when the electric board is at a mounting position with respect to the board, and a tip thereof A connection terminal whose part is detachably connected to the connector member is attached in a state where one end is caulked in advance on the side of the electric board.

According to a second aspect of the present invention, there is provided an automotive vehicle having a power supply line mounting portion connected from an electrical board provided in a casing body mounted and fixed to a vehicle body panel of an automobile to an output device. In the antenna, a conductive base member fitted to the bottom of the casing main body and supporting the electrical board, a receptacle member integrated with a signal output portion of the electrical board, and a center line of the receptacle member. A cable insertion portion formed on the base member on an extension line, and an insulator arranged in the cable insertion portion and having a terminal insertion portion formed at the center thereof is provided at a terminal portion of the cable. Inserting and holding a plug member in the receptacle member by inserting the plug member into the terminal insertion portion of the insulator It is characterized.

According to a third aspect of the present invention, in the automobile antenna according to the first aspect, the terminal portion of the cord is provided with an elastic member having a conductive portion on an outer surface, and extends a conductive wire of the cable at a central portion. A plug member connected to the base member, and a ground circuit is formed by inserting the elastic member into a cable insertion portion of the base member.

The invention described in claim 3 is the first or second invention.
In the above-described vehicle antenna, the cable insertion portion is formed in a direction perpendicular to the electrical component board.

[0010] The invention according to claim 5 is the invention according to claim 1 or 2.
In the automobile antenna described above, the cable insertion portion is formed so as to be bent with respect to the electrical board so that the middle thereof is parallel to the electrical board.

[0011]

According to the first aspect of the present invention, since the connection terminal whose one end is caulked in advance is provided on the electric board, when the electric board is attached to the board of the casing body, the connector member attached to the board is used. A connection state can be obtained simply by inserting the connection terminal into the connector.

According to the second and third aspects of the present invention, the plug member provided at the end of the cable is fitted to the receptacle member provided on the electrical board by protruding from the terminal insertion portion of the insulator. Thus, a transmission line to the output device can be provided. This allows
The connection can be made without using the wiring between the electrical board and the cable. In particular, according to the second aspect of the present invention, since the elastic member provided at the end of the cable can be pressed against the inner surface of the cable insertion portion of the base member, it can be prevented from being accidentally dropped, and the grounding circuit can be secured. Can be.

According to the fourth and fifth aspects of the present invention, the cable insertion portion has a structure extending in a direction perpendicular to the electric board or a bent structure in the middle thereof parallel to the electric board. By setting the insertion state of the cable in the cable insertion portion in accordance with the size of the space in the desired direction, the transmission line can be reliably connected to the electrical board.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view for explaining an embodiment of the invention described in claim 1. In FIG. 1, a helical coil antenna 10 includes a metal base plate 1.
1, an electric board 12 fixed above the base plate 11 at a predetermined interval to form a circuit board, and a base plate 11 for accommodating the electric board 12 inside.
And an antenna element 14 whose base end is supported by the base casing 13. The antenna element 14 includes a helical coil 14A and an antenna casing 14B that covers the helical coil 14A. By being connected to the supplied power supply fitting 15, the power supply fitting 15 is fixed to the base casing 3.

The above configuration is the same as that of the conventional helical coil antenna described with reference to FIG. The helical coil antenna 10 has a base plate 11
A BNC connector 16 is attached to the center of the lower surface of the BNC. After the helical coil antenna 10 is attached to the vehicle body panel BP, the power supply cord C is connected to the BNC connector 16 from the inside of the vehicle body panel BP, as described later. At a portion of the electrical board 12 facing the BNC connector 16, an upper end portion is caulked and fixed in advance to the electrical board 12 and connected to each electronic circuit such as an amplifier circuit and a matching circuit formed on the electrical board 12. Are mounted so as to extend downward toward the BNC connector 16. The connection terminal 17 is B
A state in which the tip (the lower end in FIG. 1) of the NC connector 16 penetrates the BNC connector 16 from above along the axial direction from above and protrudes from the distal end face (the lower end face in FIG. 1) of the BNC connector 16. And are linked. The connection terminal 17 is located inside the BNC connector 16.
The insulating layer 18 incorporated in the BNC connector 16 insulates the base plate 11 made of metal and the connection surface of the outer wall of the BNC connector 16 from each other. The electrical board 12 and the power supply fitting 15 are electrically connected to each other by connecting the contact terminal plate 19 erected on the electrical board 12 to the connection terminal 15A formed integrally with the power supply fitting 15. It is connected.

Since the present embodiment has the above configuration,
Assembly of the helical coil antenna 10 is performed as follows. That is, when assembling the electric board 12 to the base plate 11, the connection terminals 17 whose upper ends are fixed to the electric board 12 in advance are fixed to the base plate 1.
The electrical board 12 is inserted into the base plate 1 with screws 20 while the distal end of the electrical board 12 is inserted into the connector 16 from above and the distal end of the electrical board 12 is projected from the distal end surface of the BNC connector 16.
Fix to 1. Thereafter, the base casing 13 is mounted on the base plate 11, and the mounting bracket 14 </ b> C is screwed into the power supply fitting 15 to connect the antenna element 14 to the base casing 13, thereby completing the assembly of the helical coil antenna 10.

In the helical coil antenna 10 assembled as described above, the BNC connector 16 is fitted into a through hole formed in the vehicle body panel BP, and its tip surface protrudes from the inner wall surface of the vehicle body panel BP. Then, the base plate 11 is fixed on the vehicle body panel BP by being screwed through the packing sheet 21. Then, to the BNC connector 16 of the helical coil antenna 10 attached to the vehicle body panel BP as described above,
When the power supply cord C, which is a coaxial cable, is connected from the inside of the vehicle body panel BP, the electrical board 12 and the power supply cord C are electrically connected via the connection terminals 17.

Next, an embodiment of the present invention will be described. FIG. 2 is a view for explaining an embodiment of the invention described in claim 2, and shows the state of attachment of a casing used for an automobile antenna. FIG.
1, a casing body 1 having a bottom surface opened is placed on the surface of a vehicle body panel P of the vehicle body. A waterproof sealing member 2 mounted on the surface of the vehicle body panel P is fitted around a bottom surface of the casing body (indicated by a reference numeral 21 for convenience).
The base member 24 for supporting the third member 3 is disposed.
The base member 24 includes the seal member 22 and the casing body 2.
The electronic component board 23 is fastened and held by supporting columns 24A provided on the upper surface. In FIG. 1, reference numeral 21A is
An antenna element is shown. In the antenna element 21A, a power supply unit is wired to an input / output terminal on an electric board side in a support unit (not shown) in the casing main body 21.

A receptacle member 25 is provided integrally with a terminal portion serving as a signal output portion of the electrical board 23. The receptacle member 25 is integrated with an output terminal formed on the electric board 23 by a method such as caulking, and has an end that extends downward through the electric board 23.

The base member 24 is formed with a cable insertion portion 24B having a center on an extension of the center line of the receptacle member 25 integrated with the electrical board 23.
The cable insertion portion 24 </ b> B is formed of a cylindrical portion that protrudes downward from the bottom surface of the base member 24 in a direction perpendicular to the electrical component board 23, and a part of the cylindrical portion protrudes through the seal member 22. The cable insertion portion 24B has an inner diameter into which a terminal portion of a relay cable 26 described later can be inserted, and an insulator 27 surrounding the peripheral surface of the receptacle member 25 is inserted into an upper portion of an inner surface thereof. The insulator 27 has a plug terminal 2 which is connected to the insertion hole of the receptacle member 25 and has a plug terminal 2 provided in a relay cable 26 described later.
A terminal insertion portion 27A formed of a hole through which 6A can be inserted is formed, and the receptacle member 25 can be inserted when the electrical board 23 is assembled by being press-fitted in the cable insertion portion 24A in advance. I have.

The relay cable 26 has a plug terminal 26A at its terminal. The terminal section is a plug terminal 26A
In addition to the above, a metal terminal portion 26B which is in contact with the inner surface of the cable insertion portion 24B to form a part of the ground circuit is provided.
A plurality of bulging portions 26B1 formed along the circumferential direction of B
It is possible to make pressure contact using the elastic deformation restoring force.

Since the present embodiment has the above configuration,
The connection between the electrical board 23 supported by the base member 24 and the relay cable 6 is performed by inserting the terminal portion of the relay cable 26 into the cable insertion portion 24B and inserting the plug terminal 26
This is made possible by fitting A to the receptacle member 25. As a result, the wiring work between the relay cable 26 and the electrical board 23 becomes unnecessary.

Next, another embodiment will be described. FIG. 3 is a schematic diagram showing only a main part of another embodiment. The embodiment shown in FIG. 3 is characterized in that a cable insertion portion (indicated by 24B 'for convenience) has a bent shape. I have. That is, the cable insertion portion 24B 'is bent in a direction parallel to the electrical component board 23 halfway in the protruding direction. In the cable insertion portion 24B ', an insulator 27 is embedded in a portion protruding in a direction perpendicular to the electrical board 23.

Inside the insulator 27, a receptacle member (shown by reference numeral 25 'for convenience) and a terminal plate 28 for connecting the receptacle member 25' to a terminal portion on the electric board 3 side are arranged. The receptacle member 25 'has an opening in a direction parallel to the electrical board 23 so that the plug terminal 26A on the relay cable 6 side can be inserted and removed, and the terminal plate 28 is connected to the electrical board 23.
One end in the extending direction is integrated with the outer peripheral surface of the receptacle member 25 ', and the other end in the extending direction is integrated with the output terminal on the electrical board 23 by soldering or caulking.

Since the present embodiment has the above configuration,
By bending in the middle of the projecting direction, the body panel P
The space occupied by the inside can be reduced. In other words, the cable insertion portion 24B 'protruding toward the inside of the vehicle body panel P is configured such that the insertion direction of the relay cable 26 is parallel to the electrical component board 23, and therefore, the reference symbol H in FIG.
Can be reduced from the surface of the vehicle body panel P.
Thereby, only by changing the format of the base member 24,
The area occupied by the relay cable 26 connected to the casing main body 21 can be changed according to the vehicle type.

[0026]

According to the first aspect of the present invention, since the electrical board is provided with the connection terminal whose one end is caulked in advance, when the electrical board is attached to the board of the casing body, it is attached to the board. A connection state can be obtained simply by inserting the connection terminal into the connector member provided, which eliminates the need for complicated wiring work as in the related art, thereby efficiently assembling the antenna and causing wiring defects and the like. It can be done without.

According to the second and third aspects of the present invention, the plug member provided at the end of the cable is fitted to the receptacle member provided on the electrical board by protruding from the terminal insertion portion of the insulator. By doing so, a transmission line to the output device can be installed. Thus, the connection can be made without using the wiring between the electrical board and the cable. In particular, according to claim 2,
Since the elastic member provided at the end of the cable can be pressed against the inner surface of the cable insertion portion of the base member, it can be prevented from being accidentally dropped, and the ground circuit can be secured.

According to the fourth and fifth aspects of the present invention, since the cable insertion portion has a structure extending in a direction perpendicular to the electric board or a bent structure in the middle thereof parallel to the electric board. By setting the insertion state of the cable in the cable insertion portion according to the size of the space in a direction perpendicular to the direction, the transmission line can be reliably connected to the electrical board.

[Brief description of the drawings]

FIG. 1 is a side sectional view for explaining a wiring structure in a vehicle antenna according to an embodiment of the present invention.

FIG. 2 is a side sectional view for explaining an internal structure of a casing in an automobile antenna according to an embodiment of the present invention.

FIG. 3 is a side sectional view showing another embodiment relating to a part of the inside of the casing shown in FIG. 2;

FIG. 4 is a side sectional view illustrating an internal structure of a conventional automobile antenna.

[Explanation of symbols]

Reference Signs List 10 Helical coil antenna (vehicle antenna) 11, 24 Base plate (base member) 12, 23 Electrical board 13, 21 Base casing (casing body) 14, 21A Antenna element 14A Helical coil 14B Antenna casing 14C Mounting bracket 15 Power supply 15A Connection Terminal 16 BNC connector (connector member) 17 Connection terminal 18 Insulation layer C Power supply cord BP, P Body panel 24B Cable insertion part 25 Receptacle member 26 Relay cable 26A Plug terminal 26B Metal terminal part 26B1 Swelling part 27 Insulator

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masanori Hasegawa 1112 Shinnohara, Tomioka-shi, Gunma F-term in the Yokoo Tomioka Plant (reference) 5J046 AA02 AA09 AB06 AB12 DA00 MA09 MA10 MA16 5J047 AA02 AA09 AB06 AB12 EA02 EA03 EA05

Claims (5)

[Claims] 1. An automobile antenna having a built-in electrical board mounted on a board of the casing body in the casing body, wherein a connector cord is connected to the board of the casing body from outside the board. A connection terminal extending in the direction of the connector member and having a distal end portion detachably connected to the connector member when the electric board is at the mounting position with respect to the substrate is attached to the electric board in advance. An on-vehicle antenna, wherein one end of the antenna is mounted on the substrate side with a caulked state. 2. An antenna for a vehicle, comprising: a feeder line connecting part from an electrical board provided in a case body mounted and fixed to a vehicle body panel of the vehicle to an output device. A conductive base member fitted to the bottom of the electronic board to support the electrical board; a receptacle member integrated with a signal output portion of the electrical board; and a base member extending from a center line of the receptacle member. A cable insertion portion, and an insulator disposed in the cable insertion portion and having a terminal insertion portion formed at a center portion, wherein a plug member provided at a terminal portion of the cable is connected to the insulator. An antenna for an automobile, wherein a plug member is fitted and held in the receptacle member by being inserted into a terminal insertion portion. . 3. An automobile antenna according to claim 2, wherein the end portion of the cord is provided with an elastic member having a conductive portion on an outer surface, and a plug in which a conductive wire of a cable is extended and connected to a center portion. A vehicle antenna, comprising: a member; and a ground circuit formed by inserting the elastic member into the cable insertion portion of the base member. 4. The vehicle antenna according to claim 2, wherein the cable insertion portion is formed in a direction perpendicular to the electrical component board. 5. The vehicle antenna according to claim 2, wherein the cable insertion portion is formed so as to be bent with respect to the electrical board so that a partway thereof is parallel to the electrical board. Antenna.