JP7280102B2 - vehicle antenna - Google Patents

Description

The present invention relates to a vehicle antenna.

In recent years, AM, FM radio broadcasting, global positioning system (GPS), automatic toll collection system (ETC), road traffic information communication system (VICS (registered trademark)), terrestrial digital television broadcasting, inter-vehicle communication, etc. 2. Description of the Related Art Various sheet-shaped antennas that are attached to and arranged on the front and rear window glass of a vehicle have been developed to support wireless communication systems and devices (for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2010-130050

By the way, as shown in FIG. 10, for example, a conventional vehicle antenna is attached to a front or rear window glass W1 (W2) of a vehicle. Patterns 501 and 502 are formed of an opaque metal thin film or the like.
Therefore, there is a problem that the forward and rearward visibility of the positions where the antenna patterns 501 and 502 are present is obstructed.

On the other hand, there is a demand for affixing a sheet bearing a logo such as a company name or service name, a character, or the like to the front or rear window glass of a vehicle for the purpose of advertisement or decoration.

However, there are restrictions on the area of the front and rear window glass, and there is a problem that it is difficult to attach a sheet bearing a logo or the like separately from the sheet-shaped vehicle antenna.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicular antenna capable of displaying a desired logo or the like and having an antenna function without interfering with the forward or rearward field of vision. be.

In order to achieve the object, a vehicle antenna according to claim 1 is a vehicle antenna mounted on a vehicle, comprising: a sheet-like dielectric base material attached to a glass surface of the vehicle; An antenna section formed on the dielectric base material, and a conductor electrically connected to the antenna section for power supply and reception, wherein the antenna section is formed of a conductive transparent material on the dielectric base material. It is characterized by being composed of predetermined letters or characters that are formed.

As a result, the use of a transparent material does not interfere with the forward or rearward field of view, and the desired characters or characters can be displayed. A vehicle antenna can be provided.

In the vehicle antenna according to claim 2, in the invention according to claim 1, the predetermined character forming the antenna section is composed of one character or a plurality of characters selected from a character string composed of a plurality of characters. , the one or more characters are made of the conductive transparent material, and the other characters are made of a non-conductive transparent material.
As a result, a desired logo or the like can be configured with a character string that also functions as an antenna.
A vehicle antenna according to claim 3 is characterized in that, in the invention according to claim 2, the one character or the plurality of characters has a straight line part in a constituent element of each character.
Thereby, antenna characteristics can be improved.

In the vehicle antenna according to claim 4, in the invention according to claim 1, the character constituting the antenna part has an outline part of the character or a predetermined constituent part formed of the conductive transparent material, Other portions are characterized by being formed of a non-conductive transparent material.
As a result, a desired logo or the like can be configured using a character that also has an antenna function.

The vehicle antenna according to claim 5 is the invention according to any one of claims 1 to 4, wherein the conductive transparent material is ITO, zinc oxide, aluminum zinc oxide, fluorine-doped tin oxide, It is characterized by being at least one selected from the group consisting of titanium oxide, zinc sulfide, bismuth oxide, magnesium oxide and a conductive organic material.

As a result, a vehicle antenna can be realized which has an antenna function by forming a desired character or character from a conductive transparent material without interfering with the forward or rearward field of vision. can do.

In the vehicle antenna according to claim 6, in the invention according to any one of claims 1 to 5, the conducting wire is connected to a core wire of a coaxial cable wired to the vehicle, and the coaxial The jacket wire of the cable is grounded to the conductive portion of the vehicle body.
As a result, a vehicle antenna having a desired logo or the like and having an antenna function can be easily configured.

According to a seventh aspect of the invention, there is provided a vehicle antenna according to the sixth aspect, wherein the conducting wire is connected to the antenna section via a connector provided at one end of the coaxial cable.
As a result, a vehicle antenna having a desired logo or the like and having an antenna function can be easily configured.

According to the present invention, it is possible to provide a vehicular antenna that does not block the forward or rearward field of view, displays a desired logo or the like, and has an antenna function.

1 is a side view showing a vehicle equipped with a vehicle antenna according to a first embodiment; FIG. 1 is a top view showing a vehicle equipped with a vehicle antenna according to the first embodiment; FIG. It is a schematic diagram showing a windshield to which the vehicle antenna according to the first embodiment is applied. It is a schematic diagram showing a rear window to which the vehicle antenna according to the first embodiment is applied. 1 is a schematic configuration diagram showing a configuration example of a vehicle antenna according to a first embodiment; FIG. 1 is a schematic configuration diagram showing a configuration example of a connector applied to a vehicle antenna according to the first embodiment; FIG. It is a schematic diagram showing a windshield to which a vehicle antenna according to a second embodiment is applied. It is a schematic diagram showing a rear window to which a vehicle antenna according to a second embodiment is applied. FIG. 5 is a schematic configuration diagram showing a configuration example of a vehicle antenna according to a second embodiment; 1 is a schematic diagram showing a configuration example of a conventional vehicle antenna; FIG.

[First embodiment]
(Schematic configuration of vehicle antenna, etc.)
A vehicle antenna A1 (A1a, A1b) according to a first embodiment will be described with reference to FIGS. 1 to 5. FIG.

Here, FIG. 1 is a side view showing a vehicle V equipped with the vehicle antenna A1 (A1a, A1b) according to the first embodiment, and FIG. 2 is a vehicle equipped with the vehicle antenna A1 (A1a, A1b). 3 is a schematic diagram showing a windshield W1 to which a vehicle antenna A1a is applied; FIG. 4 is a schematic diagram showing a rear glass W2 to which a vehicle antenna A1b is applied; FIG. 5 is a schematic diagram showing a vehicle antenna 2 is a schematic configuration diagram showing a configuration example of A1 (A1a, A1b); FIG.
As shown in FIG. 3 and the like, for example, a vehicle antenna A1a according to the present embodiment is attached to the upper left corner of a windshield W1 of a vehicle V. As shown in FIG.

Further, as shown in FIG. 4 and the like, for example, a vehicle antenna A1b according to the present embodiment is affixed to the substantially central upper portion of the rear window W2 of the vehicle V. As shown in FIG. In the vehicle antenna A1b, the character string is reversed so that it can be read when viewed from the rear outside the vehicle.

Here, the vehicle antennas A1 (A1a, A1b) shown in FIGS. 3 and 4 have the same specifications. Alternatively, only one of the vehicle antennas A1a and A1b may be attached.

In the examples shown in FIGS. 3 and 4, etc., a logo consisting of three alphabetic characters "R", "P", and "I" is shown, but the logo is not limited to this, and a desired character type (hiragana, katakana, other country's characters, etc.), the logo can have a desired number of characters.

As shown in FIG. 5, the vehicle antenna A1 (A1a, A1b) according to the present embodiment is a transparent antenna made of polyester or the like attached to the glass surfaces of the vehicle V (the windshield W1, the rear glass W2, etc.). a sheet-like dielectric substrate F, an antenna portion A formed on the dielectric substrate F, and a lead wire 101 electrically connected to the antenna portion A for power supply and reception.
Further, the antenna portion A is composed of "I" as a predetermined character C3 formed on the dielectric base material F from a conductive transparent material.

As described above, in the present embodiment, the predetermined character "I" forming the antenna part A is selected from "R", "P", and "I" which are character strings composed of a plurality of characters. It is one character. It should be noted that the antenna section A may be composed of a plurality of characters.

In this embodiment, only the letter C3 of "I" is made of a conductive transparent material, and the other two letters C1 and C2, "R" and "P", are made of a non-conductive transparent material. .
In order to improve the antenna characteristics, it is desirable to have a linear portion in the constituent element of the letter, and the letter "I" satisfies this requirement.

Here, the conductive transparent material is at least one selected from the group consisting of ITO, zinc oxide, zinc aluminum oxide, fluorine-doped tin oxide, titanium oxide, zinc sulfide, bismuth oxide, magnesium oxide, and conductive organic materials. can do.
More specifically, transparent conductive ink “RK#183 (trade name)” manufactured by Jujo Chemical Co., Ltd., etc. can be used as the conductive transparent material.

The character strings "R", "P", and "I" are printed by screen printing, inkjet printers, etc., using paints and inks composed of the above-described conductive transparent material or non-conductive transparent material. is formed on the dielectric substrate F by

A conducting wire 101 connected to a predetermined letter “I” constituting the antenna portion A can be a core wire of a coaxial cable 100 routed inside the vehicle V. As shown in FIG. In addition, the jacket wire 102 of the coaxial cable 100 is grounded to a predetermined conductive portion of the vehicle body B by means of a fixture 250 and a screw 251 .
The other end of the core wire (conductor) 101 of the coaxial cable 100 is connected to the signal processing device 300 and the like.
If it is desired to improve the visibility of the character strings "R", "P", and "I", the peripheries of the characters may be outlined using opaque ink or the like.

According to the vehicle antenna A1 (A1a, A1b) according to the present embodiment, it is possible to mark a desired character and to form a predetermined character with a conductive transparent material without obstructing the front field of view or the rear field of view. Thus, a vehicle antenna having an antenna function can be realized.

When the vehicle body B of the vehicle V is made of an insulating material such as resin, as shown in FIG. You may make it stick the provided vehicle antenna A3. Further, when members such as a bumper are made of an insulating material such as resin, the vehicle antenna A1 may be attached to those members.
The vehicle antennas A1 (A1a, A1b) and A3 can be attached using a transparent double-sided tape, an adhesive, or the like.

(Example of connector configuration)
A configuration example of connector 200 applied to vehicle antenna A1 (A1a, A1b) according to the present embodiment will be described with reference to FIG.
As shown in FIG. 6, the character C3 constituting the antenna portion A is electrically connected to the core wire (conductor) 101 of the coaxial cable 100 via a connector 200. As shown in FIG.
The connector 200 includes a resin casing 201 with an open bottom and leaf spring-like terminals 202 fixed to the ceiling of the casing 201 with screws or the like.
One end of the terminal 202 is fixed by crimping the core wire (conductor) 101 .

A lower end portion of the terminal 202 is configured to be pressed against the surface of the character C3 when the casing 201 is placed on a predetermined position of the character C3. This establishes electrical continuity between the terminal 202 and the character C3.
A double-sided tape 204 is provided at the lower end of the casing 201 , and the connector 200 is fixed onto the dielectric substrate F with this double-sided tape 204 .

It should be noted that the gap in the casing 201 may be filled with resin or the like for molding. As a result, it is possible to avoid poor contact between the terminal 202 and the character C3 due to vibration or the like.

[Second embodiment]
A vehicle antenna A2 (A2a, A2b) according to a second embodiment will be described with reference to FIGS. 7 to 9. FIG.
Here, FIG. 7 is a schematic diagram showing the windshield W1 to which the vehicle antenna A2a according to the second embodiment is applied, and FIG. 8 is a schematic diagram showing the rear glass W2 to which the vehicle antenna A2b according to the second embodiment is applied. FIG. 9 is a schematic diagram showing a configuration example A2 (A2a, A2b) of the vehicle antenna according to the second embodiment.
As shown in FIG. 7 and the like, for example, a vehicle antenna A2a according to the present embodiment is attached to the upper left corner of the windshield W1 of the vehicle V. As shown in FIG.
Further, as shown in FIG. 8 and the like, a vehicle antenna A2b according to the present embodiment is attached to the upper right corner of the rear window W2 of the vehicle V, for example.

Here, the vehicle antennas A2 (A2a, A2b) shown in FIGS. 7 and 8 have the same specifications. Alternatively, only one of the vehicle antennas A2a and A2b may be attached.

The face-like character C4 that constitutes the antenna portion A has an outline portion C4a of the character C4 made of a conductive transparent material, and the other portions made of a non-conductive transparent material.
As the conductive transparent material, the materials mentioned in the first embodiment can be applied.

Then, the character C4 is formed on the dielectric base material F by screen printing, printing by an inkjet printer, or the like, using paint or ink composed of the above-described conductive transparent material or non-conductive transparent material. .

The lead wire 101 connected to the outline portion C4a of the character C4 forming the antenna portion A can be a core wire of the coaxial cable 100 routed inside the vehicle V. As shown in FIG. In addition, the jacket wire 102 of the coaxial cable 100 is grounded to a predetermined conductive portion of the vehicle body B by means of a fixture 250 and a screw 251 .
The other end of the core wire (conductor) 101 of the coaxial cable 100 is connected to the signal processing device 300 and the like.
If it is desired to improve the visibility of the character C4, part of the constituent elements may be bordered using opaque ink or the like.

Note that the face-like character C4 is merely an example, and characters of various types and shapes can be used. Considering the characteristics of the antenna, for example, if there is a beard or hair having a straight portion, it is preferable to form the straight portion as the antenna portion A with a conductive transparent material.

According to the vehicle antenna A2 (A2a, A2b) according to the present embodiment, it is possible to mark a desired character without hindering the forward or rearward field of view, and to form a predetermined portion with a conductive transparent material. Thus, a vehicle antenna having an antenna function can be realized.

Although the vehicle antenna and the like of the present invention have been described above based on the illustrated embodiments, the present invention is not limited to this, and the configuration of each section can be replaced with any configuration having similar functions. be able to.

A1 (A1a, A1b), A2 (A2a, A2b), A3...Vehicle antenna A...Antenna part V...Vehicle B...Car body W1...Windshield W2...Rear glass C1 to C3...Character string F...Dielectric base material 100... Coaxial cable 101 ... conducting wire (core wire)
102... Outer wire 300... Signal processing device

Claims (7)

A vehicle antenna mounted on a vehicle,
a sheet-shaped dielectric substrate attached to the glass surface of at least one of the windshield and rear glass of the vehicle;
an antenna section formed on the dielectric substrate;
a conductor electrically connected to the antenna unit for feeding and receiving power,
A vehicular antenna, wherein the antenna section is composed of predetermined letters or characters formed of a conductive transparent material on the dielectric substrate. The predetermined characters constituting the antenna part are composed of one or more characters selected from a character string composed of a plurality of characters, and the one or more characters are formed of the conductive transparent material, and 2. The vehicle antenna according to claim 1, wherein the characters other than the characters are made of a non-conductive transparent material. 3. The vehicle antenna according to claim 2, wherein the one or more characters have a linear portion in each character component. 3. The character constituting the antenna section is formed of the conductive transparent material in the contour portion or the predetermined constituent portion of the character, and the other portions are formed of the non-conductive transparent material. 2. The vehicle antenna according to 1. The conductive transparent material is at least one selected from the group consisting of ITO, zinc oxide, zinc aluminum oxide, fluorine-doped tin oxide, titanium oxide, zinc sulfide, bismuth oxide and magnesium oxide, and conductive organic materials. The vehicle antenna according to any one of claims 1 to 4, characterized in that: The conducting wire is connected to a core wire of a coaxial cable that is routed to the vehicle, and a jacket wire of the coaxial cable is grounded to a conductive portion of a vehicle body of the vehicle. Item 6. The vehicle antenna according to any one of Item 5. 7. The vehicle antenna according to claim 6, wherein the conducting wire is connected to the antenna section via a connector provided at one end of the coaxial cable.

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