JPH10190332A - On-vehicle antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily attachable FM broadcasting reception antenna for which TV broadcasting and VICS (road traffic information communication system) are multiplexed. SOLUTION: This device is composed of an antenna element 21 for receiving FM broadcasting for which the TV broadcasting and the VICS are multiplexed, the reception signal amplification part 23 and the GPS antenna unit 31 of an antenna for receiving a GPS(global positioning system) and the reception circuit part, etc. In this case, the reception signal amplification part 23 and the GPS antenna unit 31 are shielded and integrally incorporated inside an antenna unit 11. Then, the antenna element 21 is stuck to the glass surface of a rear window or the like and the antenna unit 11 is fixed on a rear parcel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle antenna device used in a vehicle or the like.
TV and VICS (Vehicle Information and Commun
ication System; road traffic information communication system) information,
The present invention relates to an in-vehicle integrated antenna device incorporating a car navigation system based on GPS (Global Positioning System) information.

[0002]

2. Description of the Related Art Conventionally, a vehicle-mounted antenna device having an antenna element for receiving a normal TV broadcast or FM broadcast is provided in a vehicle. Further, some vehicles are provided with a GPS receiving antenna device for car navigation. In such a case, the two antenna devices are separately installed. For example, a receiving antenna apparatus for receiving TV broadcasts and FM broadcasts includes an antenna element and an antenna unit having a built-in reception signal amplifying unit for amplifying a signal received by the antenna element. It is installed on the vehicle body by being attached to a glass surface such as. The GPS receiving antenna device is installed on a roof or a trunk,
It is installed near the window such as the upper surface of the dashboard or the upper surface of the rear parcel.

[0003]

However, in the above-mentioned conventional on-vehicle antenna device, an antenna unit including an antenna element for receiving a TV broadcast and an FM broadcast and a reception signal amplifying unit, and a GPS antenna unit for receiving a GPS. Are prepared separately, and each of these antenna units is individually mounted, so mounting work for the vehicle is troublesome and troublesome, and it is necessary to separately install many types of antennas like this. Had unfavorable problems such as poor appearance.

[0004] The present invention has been made to solve such a conventional problem, and is provided with an antenna device for receiving a TV broadcast and an FM broadcast and an antenna device for GPS reception that can be integrated. It is an object of the present invention to provide an antenna device for a vehicle.

[0005]

To achieve the above object, a vehicle-mounted antenna device according to the present invention amplifies a received signal received by an antenna element capable of receiving a TV broadcast and an FM broadcast including VICS information. The GPS unit is installed in the antenna unit in which the received signal
A GPS antenna unit including a receiving antenna and a receiving circuit unit is built in, a VICS signal is supplied from the received signal amplifying unit to at least a VICS information processing unit to obtain road traffic information, and a GPS signal from the GPS antenna unit is obtained. Is supplied to the GPS signal processing unit to detect the current position.

Further, in the above-mentioned antenna device for a vehicle,
Shield means comprising an upper shield part and a lower shield part is provided in the antenna unit, and the receiving circuit part of the GPS antenna unit is shielded by an upper shield part of the shield means. The reception signal amplification section is shielded by a lower shield section. Further, the antenna element may be a diversity antenna. Still further, the antenna element can be attached to a glass surface of a window of a vehicle body, and the antenna unit can be fixed near the window.

[0007] In such a vehicle-mounted antenna device of the present invention, a reception signal for amplifying a reception signal received by an antenna element capable of receiving FM broadcast in which TV broadcast and VICS are superimposed in one antenna unit. Since the amplifying unit and the GPS antenna unit are built in, the antenna device which has been conventionally separated can be integrated. Therefore, the mounting work of the antenna device can be easily performed. Also, VI
Since FM broadcast multiplexed with CS information can be received, accurate information for car navigation can be obtained from the received VICS information and GPS information.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A configuration example of an embodiment of a vehicle-mounted antenna device according to the present invention is shown in FIGS.
FIG. 1 is a diagram showing the entire vehicle-mounted antenna of the present invention, FIG. 2 is a cross-sectional view showing the configuration of an antenna unit in the vehicle-mounted antenna of the present invention, and FIG. FIG. 4 is an exploded perspective view of the antenna unit in FIG. 1, and FIG. 4 is a diagram showing an embodiment in which the vehicle-mounted antenna of the present invention is mounted on a vehicle.

The vehicle-mounted antenna according to the present invention comprises, as shown in FIG. 1, two antenna elements 21 and 21 constituting a diversity antenna, an antenna unit 11, and a power line and a signal line drawn from the antenna unit 11. It is configured. The antenna elements 21 and 21 are provided with an element holder 22 for holding the antenna elements 21 and 21 attached to a glass surface at a front end and an intermediate portion.
In addition, the antenna unit 11 includes a circuit board 2 of a reception signal amplifying unit that amplifies a TV / FM signal assembled on the circuit board.
3 and a GPS antenna unit 31. The power supply line drawn from the antenna unit 11 is connected to a 12V power supply and ground via a fuse. Further, the antenna unit 1
One of the signal lines drawn from 1 is a signal line for supplying a GPS signal, a connector 32 is provided at an end thereof, and the other two signal lines are terminals mounted on the diversity unit. 24a and 24b are provided.

[0010] In addition, the antenna elements 21 and 21 not only perform TV broadcasting and FM broadcasting, but also VICS.
It is possible to receive an FM broadcast in which (text information) is multiplexed. Further, a fixing means for detachably fixing the antenna unit 11, for example, a magic tape (registered trademark) is attached to the back surface of the antenna unit 11. FIG. 3 is an exploded perspective view showing a detailed configuration of the antenna unit 11 in which the circuit board 23 of the reception signal amplifier and the GPS antenna unit 31 are incorporated, and FIG. 2 is a sectional view of the antenna unit 11 after assembly. Antenna unit 11
A case base 12 provided with fixing means for detachably fixing to the back surface;
It is composed of a case cover 18 fixed by screws 19.

On the case base 12, a circuit board 23 of the received signal amplifying section is arranged by being screwed with four mounting screws 13, and a shield case 15 is provided so as to cover the circuit board 23. It is attached to the case base 12 by being engaged with fixed claws 14 formed so as to stand up at two places on both sides of the case 12. At this time, the fixing claws 14, 14 are located on both sides of the shield case 15.
It comes into engagement with the fixed claw receiving port 15a formed at the location.

The circuit board 23 is covered by a box-shaped lower shield portion formed below the shield case 15, and a box-shaped upper shield portion 16 is formed above the shield case 15. In the upper shield portion 16, a wave spring 17 is provided on the inner peripheral surface step 16a.
The GPS antenna unit 31 is elastically fitted via the. Further, when the case cover 18 is fitted from above so as to cover the entire GPS antenna unit 31, each corner of the GPS antenna unit 31 is formed by a downwardly projecting projection 18 a formed on the inner surface of the top of the case cover 18. Becomes pressed. As a result, the GPS antenna unit 31 has the wave spring 17 and the projection 18a.
Thereby, it is elastically held in the shield case 15.

Further, the case cover 18 is screwed down from below at each corner of the case base 12 with a mounting screw 19, whereby the entire antenna device is integrated.
Note that the shield case 15 is made of a conductive material such as a metal or a resin material in which metal plating is applied to the entire outer surface. A cutout portion 16b formed on the side surface of the upper shield portion 16 is a cutout for leading out a signal line for outputting a GPS signal. The notch 12a formed on the side surface of the case base 12 is GP
This is a cutout for extracting an S signal line and a TV / FM signal line.

As described above, the on-vehicle antenna according to the present invention includes:
A reception signal amplifying unit 23 that amplifies a reception signal received by the antenna element 21 and has a GPS signal antenna, which has an antenna element 21 capable of receiving FM broadcast multiplexed with TV broadcast and VICS information;
And a GPS antenna unit 31 provided with the received signal processing unit are stacked and accommodated in the antenna unit 11. Therefore, the entire vehicle-mounted antenna can be reduced in size, and traffic information can be extracted from the VICS information received by the antenna element 21. Further, the GPS antenna unit 31
The current position can be detected from the received GPS information. Thus, accurate car navigation can be performed. Further, the antenna unit 1
Since the reception signal amplifying unit 23 and the GPS antenna unit 31 are shielded and built in the unit 1, intrusion of noise and the like from the outside can be effectively prevented.

In the case of the vehicle-mounted antenna device having the above configuration, as shown in FIG.
As for the antenna element 21 for receiving the V / FM broadcast, the antenna element 21 is attached by attaching an element holder 22 to a glass surface or the like of a rear window a of the vehicle body. In addition, the TV / FM
The antenna unit 11 in which the reception signal amplifying unit 23 for amplifying the reception signal of the broadcast and the GPS antenna unit 31 are respectively shielded and built-in is attached to the rear parcel b by attaching or detachable fixing means. To This simplifies the mounting and mounting properties for the vehicle, and also has the effect of preventing theft and the like since the device is mounted in the vehicle.

[0016]

As described above, the present invention includes an antenna element for receiving FM broadcasting in which TV broadcasting and VICS information are multiplexed, and comprises a receiving signal amplifying unit, a GPS receiving antenna and its receiving circuit unit. Since the GPS antenna unit is incorporated in one antenna unit, it can be used as a composite antenna having both the VICS function and the GPS function. Therefore,
Accurate car navigation can be achieved. For TV and FM broadcast receiving antenna elements, the antenna element is attached to the glass surface of the rear window, etc.
Unlike the conventional antenna device, it is easy to mount on a vehicle, unlike the conventional antenna device, by fixing the antenna unit body, in which the V / FM broadcast reception signal amplification unit and the GPS antenna unit are shielded and built in, on the rear parcel. In addition, it is possible to provide an in-vehicle antenna device having various practically useful features such as good appearance.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory diagram showing a configuration of an embodiment of a vehicle-mounted antenna device of the present invention.

FIG. 2 is a cross-sectional view showing a state where the antenna unit in the vehicle-mounted antenna device of the present invention is assembled.

FIG. 3 is an exploded perspective view of an antenna unit in the vehicle-mounted antenna device of the present invention.

FIG. 4 is an explanatory view of a state in which the vehicle-mounted antenna device of the present invention is mounted in a vehicle cabin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Antenna unit 12 Case base 12a Notch 13 Mounting screw 14 Fixed claw 15 Shield case 15a Claw socket 16 GPS storage recess 16a Inner peripheral surface step 16b Notch 17 Wave spring 18 Case cover 18a Projection 19 Mounting screw 20 Power supply terminal DESCRIPTION OF SYMBOLS 21 Antenna element 22 Element holder 23 Received signal amplification part 24a, 24b Output terminal 31 GPS antenna unit 32 Output terminal a Rear window b Rear parcel

Claims (4)

[Claims] An antenna for receiving a GPS signal is provided in an antenna unit having a built-in reception signal amplifying unit for amplifying a reception signal received by an antenna element capable of receiving an FM broadcast in which TV broadcasting and VICS information are multiplexed. A GPS antenna unit including the receiving circuit unit is built in, and a signal is supplied from the received signal amplifying unit to at least the VICS information processing unit to obtain road traffic information.
A vehicle-mounted antenna device wherein a signal from an S antenna unit is supplied to a GPS signal processing unit to detect a current position. 2. A shield means comprising an upper shield part and a lower shield part is provided in the antenna unit, and the receiving circuit part of the GPS antenna unit is shielded by the upper shield means of the shield means. The on-vehicle antenna device according to claim 1, wherein the reception signal amplifying unit is shielded by the lower shield unit of the shield unit. 3. The antenna according to claim 1, wherein the antenna element is a diversity antenna.
The in-vehicle antenna device as described in the above. 4. The vehicle according to claim 1, wherein the antenna element is attached to a glass surface of a window of the vehicle body, and the antenna unit is fixed to the vicinity of the window. In-vehicle antenna device.