JPS60260205A - On-vehicle antenna system - Google Patents

Abstract

PURPOSE:To attain the safety of driving by inhibiting the driving of a vehicle except the state that an antenna for receiving satellite broadcast freely turnably possible for raising and falling provided on a roof of the vehicle such as an automobile is made brought down. CONSTITUTION:The parabolic antenna 1 for receiving satellite broadcast is contained in a storage cover 3 provided on a roof of the automobile. When a shutter 28 is closed completely, a switch 36 driven by the tip of the shutter is fitted to the cover 3 and the switch 36 is connected in series with an engine key switch. Thus, the engine of the automobile is not started except the state that the antenna 1 is stored in the cover 3 and the shutter 28 is closed. Then the possibility of the automobile is precluded from being driven in the state that the antenna 1 is raised in error and the safety of drive is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vehicle-mounted antenna device that allows a vehicle such as an automobile to receive satellite broadcasting.

Conventional configuration and its problems Conventionally, as a device for receiving all television broadcasts in a car, a diversity antenna composed of a combination of monopole antennas is attached to the roof side of the car. The device that receives the information is used.

However, with such conventional devices, there is a lot of ghost interference in sub-district areas and mountainous areas, making it difficult to obtain good reception images, and in areas far from the broadcasting antenna or with mountains etc. on the way, the electric field strength is weak. However, there were many limitations, such as poor reception conditions.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional technology, and allows a vehicle such as a car to always receive television broadcasts satisfactorily without being restricted by the reception location. It can improve performance and appearance, and L7
It is an object of the present invention to provide an on-vehicle antenna device that can ensure the safety of running a vehicle.

'Structure of the Invention In the present invention, in consideration of the characteristic of vehicles such as automobiles that the receiving location always changes, a satellite broadcasting signal that can receive direct waves satisfactorily regardless of the receiving location is received by a vehicle. The receiving antenna is installed so that it can be raised and rotated freely, and the antenna is stored in a folded state in a storage cover provided on the roof of the vehicle so as not to interfere with the running of the vehicle. In addition, the vehicle is prohibited from driving unless the antenna is folded down, to prevent accidents caused by accidentally driving with the antenna up, and to ensure safety. It is characterized by the fact that

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention for receiving satellite television broadcasting will be described below with reference to the accompanying drawings.

1 and 2 show a state in which a parabolic antenna 1 for receiving satellite television broadcasting is housed and installed in a housing cover 3 provided on the roof of an automobile 2. In this device, as shown in FIG. 3, a pair of bearings 4 are provided on the roof inside the storage cover 3, and a support member 5 for raising and lowering is rotatably supported between them. A bolt 6 is rotatably provided. 7 is a motor for driving the support member 5 up and down; 8
is a motor for driving the bolt 6 times. A pair of support plates 5afI are provided on the support member 6, and a somewhat vertically elongated through hole is provided at the tip of the support plate 5afI, through which the support shaft 9 is inserted, and supports the pole 10& in a rotatable manner. The base of the pole ICJa is rotatably attached to a napto 11 fitted with a bolt 6.

Further, a pair of guide rails 12 are attached to the upper surface of the roof of the automobile 2, as shown in FIG. Rotatably attached to the back. This guide member 13 is made up of two metal rods 13a and 13b, and threads are cut in opposite directions at the abutting portions in the center, and these are fitted onto adjustment bolts 14, so that the overall length can be adjusted. .

On the other hand, a pole 101) i to which a coupling box 15 is fixed is rotatably attached to the tip of the pole 10a, and a frame 17 of a parabolic antenna 10 and a reflector 16 is attached to the coupling box 15 on a support shaft 1.
8 to attach it so that it can rotate freely. Frame 17 has a vertical
A weight 19 for indicating the corner and a mark 20 are provided. The pole 10'aK fixes the support plate 21, attaches the motor 22 for rotating the antenna, and connects the gears 23&, 23bf, H.
The parabolic antenna 1 can be rotated through the antenna. A motor 24 for adjusting the elevation angle is installed in the coupling box 15, and the elevation angle of the parabolic antenna 1 is adjusted and suspended via gears 25a and 25bi. 26 is a primary radiator and SHF converter attached to the parabolic antenna by an arm 27.

Next, the operation of the receiving apparatus configured as described above will be explained.

When driving the secondary vehicle 2, if the parabolic antenna 1 is raised, excessive wind pressure will be applied, which is dangerous, so please lower the parabolic antenna 1 as shown in Figures 1 and 2. and place it face down on the roof and store it inside the storage cover 3. And shutter 2 of storage cover 3
Close 8. In this way, the running of the automobile 2 is not affected at all, and the appearance is also good.

In this device, a switch 36 is attached to the housing cover 3 and is switched by the tip when the shutter 28 is completely closed.
6 is connected in series with the engine key switch of the automobile 2. With this configuration, parabolic antenna 1
is completely collapsed and stored in the storage cover 3, and the shutter 2
Since the engine of the automobile 2 is not started unless the parabolic antenna 8 is closed, the risk of driving with the parabolic antenna 1 erroneously raised can be eliminated, and driving safety can be ensured.・In addition to the switch 29 described above, other means for detecting the falling of the parabolic antenna 1 and controlling the running of the vehicle 2 include a switch that is switched by the parabolic antenna 1 itself, and a switch that is switched by the parabolic antenna 1 itself. A switch or the like that is switched by the motor 7 for driving the antenna 1 up and down can be used.

Next, when the car 2 is stopped to receive satellite television broadcasting, the shutter 28 of the storage cover 3 is first opened as shown in FIG. Next, the support member 5 is raised by the motor 7, one end of the guide member 13 is slid along the guide rail 12, and the laboratory antenna 1 is raised as shown in FIG.

Furthermore, in this state, the motor 8 is operated to
f: Adjust the base of the υ pole 10 left and right by rotating it. By controlling these two motors 7.8, the poles 10a, 10b are adjusted to be vertical.

6 and 7 show means for detecting whether or not the pole 1ON, 10b is vertical. This is pole 10a
A weight 3o is inserted through the universal joint 29 inside the
is suspended, and pressure sensors 31a to 31 are mounted in four directions around it.
d, and as shown in FIG.
The outputs of 1a to 31d are applied to two sets of differential amplifiers 32.33, and depending on the balance state of those outputs, meters 34.
At 36, the inclination state of the pole 10a is displayed. For example, the meter 34 indicates the horizontal inclination of the pole 10a, and the meter 36 indicates the longitudinal inclination. Therefore, I adjusted the motor 7.8 so that the indications on the meters 34 and 35 were both at the center, and the pole 10iL,
1 Make ob vertical.

Next, in this vertical state, reflector 1 of parabolic antenna 1
6 to a predetermined elevation angle, the motor 24 is operated to rotate the frame 17 relative to the coupling box 15. Since the angle at which the broadcasting satellite is viewed differs depending on the area in the country, the angle of elevation is checked using a manual or the like, and the angle of elevation is read using the weight 18 hanging vertically and the scale 19, and the angle of elevation is adjusted to the predetermined angle.

Finally, by operating the motor 22, the pole 10b1 coupling box 15 is rotated relative to the pole 10a, and the parabolic antenna 1 is rotated to find the direction in which the television signal of ゛ can be received from the broadcasting satellite, and the maximum sensitivity is point in the direction At this time, it is important that the poles 10a and 10b are vertical; if they are not vertical, the angle of elevation will change depending on the direction, and it will be difficult to capture the signal well. Engineering 1. □、、、Measure, stop at 3 degrees□、
) The vehicle body is often tilted depending on the location, so the tilt of the pole 10a is detected by the above-mentioned vertical detection means, and the poles 10e, 10 are detected regardless of the tilt of the vehicle body.
b'(i7) It is effective to be able to adjust it vertically.

In this way, the parabolic antenna 1 can be easily and accurately adjusted towards the broadcasting satellite, and can directly receive television signals from the broadcasting satellite from anywhere in the country, as long as there is no direct obstruction in front of it. be able to. Therefore, even if the user travels by car to a place where normal television broadcast radio waves cannot reach, such as in a mountainous area, the television broadcast can be viewed. Furthermore, even in a community area, it is possible to see a good television image that is not affected by ghosts caused by buildings or the like.

When viewing is finished, the parabolic antenna 1f is brought down again by the motor 7 to the roof as shown in FIG.

Although the above embodiments have been described using a parabolic antenna, various other antennas such as a planar microwave antenna applying the theory of a crank-type microstrip antenna may also be used. In addition to television broadcasting, broadcast signals from broadcasting satellites are based on PGM. Audio broadcasts etc. can also be received.

Effects of the Invention As described above, according to the present invention, an antenna for receiving satellite broadcasting is installed in a vehicle such as a car so that the antenna can be raised and lowered and rotated once.
In addition, since the vehicle is configured to be able to drive only when the antenna is folded down, the antenna can be rotated upright and pointed in the direction of the broadcasting satellite when the vehicle is stopped, making it possible for vehicles etc. No matter where you go, you can easily receive high-quality television broadcasts from broadcasting satellites.

Furthermore, since the vehicle is not allowed to run unless the antenna is folded down, there is no risk of the vehicle accidentally running with the antenna raised, and safety can be ensured.

-4゛-〈'Brief explanation of the drawings Fig. 1 is a cross-sectional side view of a vehicle-mounted antenna device according to an embodiment of the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is a view with the storage cover removed. FIG. 4 is a perspective view of the antenna in its raised state; FIG. 5 is a cross-sectional side view of its main parts; FIG. 6a.

7b is a partially cutaway perspective view and a sectional front view of an example of a tilt detection device used in the device, and FIG. 7 is a circuit diagram thereof.

1...Parabola antenna, 2...Car, 3...Storage cover, 5゛...Support member, 6...Bolt, 7.8... ...Motor, 10
&, 10b...Pounope 11...Natsuto, 16...Combining box, 16... -Reflector, 17
...Frame, 19...Weight, 20...
- Scale, 21...Support plate, 22...Motor, 23a.

23b... Gear, 24... Motor,
26&.

25b...Gear, 26...-Next radiator and converter, 28...Shutter, 29.
·····switch.

Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure 7 (α) (t))

Claims (1)

[Claims] A travel control system that includes a satellite broadcast receiving antenna installed on the roof of a vehicle so as to be tiltable and rotatable, detect the tilted state of the antenna, and prohibit the vehicle from running unless the antenna is tilted down. An in-vehicle antenna device equipped with a device.