JPH04275705A - Built-in antenna for automobile - Google Patents

Abstract

PURPOSE:To easily exchange an old hatch roof for a new one under simple constitution in the automobile of T-bar roof specification automobile by using a first feeding connector and a second feeding connector as a rod pin for fixing when an antenna hatch roof is fixed to a T-bar roof. CONSTITUTION:The antenna hatch roof 36 which is exchanged for the hatch roof 26 of the resin detachable hatch roof 22 of the automobile consists of a plane antenna element part 40, a coaxial cable 42, and the connector 38 used as the rod pin for fixing. Furthermore, a coaxial connector which is connected to the connector 38 and which can be used as the rod pin for fixing is provided for the resin detachable hatch roof 22 of the automobile. A feeding and connecting is finished easily only by mounting the antenna hatch roof 36 to the resin detachable hatch roof 22 by permitting the connector 38 and the coaxial connector to share the rod pin.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to an embedded antenna for a car used for a car phone etc. connected to a public line network, and in particular, an antenna element is embedded in the removable hatch roof of a car with a T-bar roof specification, and the antenna element is replaced. The present invention relates to an automotive embedded antenna in which a fixing rod pin is also used as a power supply connector.

0002

[Prior Art] In modern mobile communication, for example, as an antenna for a car phone on a public line network, a base is placed on the trunk lid at the rear of the vehicle body or on the roof side in front, and a multi-stage co-linear antenna is mounted on this base. There are many examples where elements are attached. Since this antenna is attached to the outside of the vehicle, damage may occur.

[0003] In order to avoid such damage and accidents, and in consideration of convenience and aesthetics during car washing, an automobile antenna that is embedded in the car body has been proposed.

[0004] As an example of this,
An example is the automobile window glass antenna described in Publication No. 0.

[0005] In this example, as shown in FIG. 4, an antenna element 4 is embedded in a window glass 2 of a roof, and a coaxial cable 6 is connected to this feeding point.

[0006]

By the way, when installing the above-mentioned automobile window glass antenna on the above-mentioned conventional roof window glass or rear window glass, it is necessary to replace the window glass itself. In this case, it takes time and effort to replace it, and the cost burden is also large.

[0007]Also, the antenna element 4 can be embedded in advance in the roof window glass or rear window glass of all car models during manufacturing, but in this case, the number of man-hours increases;
Additionally, there is a drawback that those who do not take advantage of this will incur extra costs.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an embedded antenna for a vehicle with a T-bar roof specification, which has a simple structure and can be easily replaced with a conventional hatch roof.

[0009]

[Means for Solving the Problems] In order to achieve this object, the present invention provides an antenna hatch roof that is replaced with at least one hatch roof of a T-bar roof of an automobile, and an antenna element portion attached to the antenna element portion. A power supply line to which one end is connected, and a first power supply connector which also serves as a fixing rod pin when replacing the one hatch roof and is connected to the other end of the power supply line, and , characterized in that a second power supply connector is provided on the body side of the automobile, which also serves as a fixing rod pin when replacing one of the hatch roofs, and is connected to the first power supply connector. be.

0010

According to the present invention, when replacing a conventional hatch roof with an antenna hatch roof, the first power feeding connector and the second power feeding connector are connected. At the same time, the first power supply connector and the second power supply connector are also used as fixing rod pins when fixing the antenna hatch roof to the T-bar roof, which simplifies the configuration and facilitates replacement. can.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows the configuration of one embodiment. The vehicle shown in this example is an automobile with a T-bar roof specification, and a resin-made removable hatch roof 22 (corresponding to the T-bar roof) is provided on the roof of the vehicle body 21 of this automobile. This removable resin hatch roof 22 is used to bring daylight into the interior of the vehicle and to provide a sense of openness inside the vehicle by removing the hatch roof.

This removable resin hatch roof 22 is composed of two hatch roofs 24 and 26 on the left and right, and these hatch roofs 24 and 26 are the same as the hatch roof 2 in the removed state.
As shown in 6, fixing rod pins 28a and 28b are provided at both ends. These fixing rod pins 28a, 28
b is fitted into a mounting part (not shown) of the vehicle body 21,
It has a structure in which the hatch roof 26 is fixed. The hatch roof 24 also has a similar configuration.

Here, this hatch roof 26 is an antenna hatch roof 3 that serves as a transmitting and receiving antenna for a car telephone.
It is constructed so that it can be inserted in place of 6. The antenna hatch roof 36 has a planar antenna element 40 embedded in an insulating member, for example, a plastic member 37 that transmits light.

Furthermore, one end of a coaxial cable (corresponding to a feed line) 42 is connected to a feed point (not shown) of the planar antenna element 40, and the other end is connected to a first coaxial connector (receptacle) fixed to an end of a plastic member 37. (corresponding to the power supply connector) 38.

After the planar antenna element 40, coaxial cable 42, and coaxial connector 38 are connected, when the plastic member 37 is manufactured by molding, if the plastic member 37 is arranged and fixed in one piece, strength and waterproofness can be improved. will improve. Alternatively, the plastic member 37 may be made of two sheets, and the planar antenna element 40, coaxial cable 42, and coaxial connector 38 may be fixed between the two sheets and bonded together.

A fixing rod pin 39 is fixed to the antenna hatch roof 36 at the opposite end of the plastic member 37 where the coaxial connector 38 is provided.

The antenna hatch roof 36 constructed as described above is replaced and placed in the position where the hatch roof 26 is fitted. In this case, as will be described in detail later, the coaxial connector 38 is connected to the coaxial connector (plug, corresponding to the second power supply connector) 50, and the fixing rod pin 39 is fitted into a fixing mechanism (not shown). The whole is fixed to the vehicle body 21.

FIG. 2 shows the coaxial connector 38 and the coaxial connector 5.
This figure shows the connection part of 0 in detail.

This coaxial connector 38 and coaxial connector 50
are designed to match the characteristic impedance of the feeding point of the planar antenna element 40, and are each constructed integrally with the coaxial cable. For coaxial cables, for example, a so-called semi-rigid coaxial cable structure is easily used, in which the outer sheath is a copper tube, the core wire (center conductor) is a copper wire, and the insulator (dielectric material) between them is Teflon.

In this case, a copper tube whose diameter is increased is connected to the distal end portion of the coaxial connector 50 so as to be fitted into the distal end portion 38a of the coaxial connector 38. Then, the core wire 50b is used as it is as a center contact.

The coaxial connector 38 has a copper tube whose tip end is a sheath of a semi-rigid coaxial cable 56, and the center contact 38b has a well-known slotted contact on the core wire so that the core wire 50b of the coaxial connector 50 can be inserted. Connected configuration. The end of this coaxial cable 56 is connected to a wireless telephone device for a car phone (not shown).

[0023] Note that the characteristic impedance of this coaxial connector and coaxial cable is matched regardless of the above configuration.
Any structure may be used as long as it can be used as a fixed rod pin.

FIG. 3 shows a state in which the coaxial connector 38 and the coaxial connector 50 configured as described above are connected, that is, the antenna hatch roof 36 is replaced with the hatch roof 26 and is fitted into the removable resin hatch roof 22. This shows the connection status when the connection is made.

Next, the operation of the above configuration will be explained.

As shown in FIG. 1, when using a car phone, the antenna hatch roof 36 is replaced with the conventional hatch roof 26.
Use it in exchange. In this case, it is less troublesome than, for example, replacing the window glass in which the antenna is embedded. In addition, it is no longer necessary to embed antenna elements in the roof window glass or rear window glass of all car models during manufacturing, and in this case,
The number of man-hours during manufacturing is reduced, resulting in lower costs. Further, as shown in FIG. 3, by sharing the rod pin with the coaxial connector 38 and the coaxial connector 50, the antenna hatch roof 36 can be replaced with the resin removable hatch roof 22.
The power supply connection can be easily completed by simply attaching the device to the device, which eliminates the hassle of running coaxial cables and other troublesome tasks.

Furthermore, the coaxial cable is no longer exposed and routed outside the vehicle body 21 or inside the vehicle interior, and the design is not adversely affected.

Although the above embodiment has been described as a transmitting/receiving antenna for a car telephone, it can also be used as an antenna for a global positioning system (GPS) or a satellite broadcasting (BS). In this case, the planar antenna element 40 may be configured in consideration of its frequency, wave surface, gain, etc.

[0029]

As explained above, according to the present invention, when replacing a conventional hatch roof with an antenna hatch roof, the first power feeding connector and the second power feeding connector are connected, and at the same time, the first power feeding connector and the second power feeding connector are connected. Since the first power feeding connector and the second power feeding connector are also used as fixing rod pins when fixing the antenna hatch roof to the T-bar roof, the configuration is simplified and the replacement is easy. have

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of an embodiment of an automotive embedded antenna of the present invention.

FIG. 2 is a perspective view showing in detail the configuration of a connecting portion of the coaxial connector in the embodiment shown in FIG. 1;

3(a), (b), and (c) are configuration diagrams for explaining the connection portion shown in FIG. 2; FIG.

FIG. 4 is a configuration diagram of an automobile window glass antenna used to explain a conventional example.

[Explanation of symbols]

21 Vehicle body 22 Resin removable hatch roof 26 Hatch roof 36 Antenna hatch roof 37 Plastic member 38 Coaxial connector (receptacle) 40 Planar antenna element 42 Coaxial cable 50 Coaxial connector (plug)

Claims (1)

[Claims] Claim 1: An antenna hatch roof to be replaced with at least one hatch roof of a T-bar roof of an automobile, an antenna element portion, a feed line having one end connected to the antenna element portion, and the antenna hatch roof replaced with the one hatch roof. A first power supply connector is provided which also serves as a fixing rod pin when the vehicle is installed, and is connected to the other end of the power supply line, and is provided on the vehicle body side of the vehicle to replace the one hatch roof. An embedded antenna for an automobile, characterized in that a second power feeding connector is provided which also serves as a fixing rod pin and is connected to the first power feeding connector.