JP2004104696A - Film antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film antenna which is excellent in adaptability to various use conditions and in convenience. <P>SOLUTION: In a film antenna A wherein a plurality of antenna parts B1 and B2 composed of foil-like receiving patterns are additionally located on a film body 1 which is stuck on car window glass, so that terminals B3 and B4 of the antenna parts are positioned at a peripheral edge 1a on one terminal side of the film body 1, between one antenna part adding area A1 added with at least one antenna part B1 and another antenna part adding area A2 added with the other antenna part B2, a film cutting area C for separating the areas is provided. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a film antenna used by being attached to a vehicle window glass.
[0002]
[Prior art]
This type of film antenna is attached to the car window glass such as the rear window and side window, and the antenna part formed on the film body is connected to a receiving device to enable reception of radio waves such as radio broadcasts and television broadcasts. Is what you do.
In the conventional film antenna, as shown in FIG. 9, a plurality of film antennas 120 each having an antenna portion 130 formed thereon and attached to a sheet-like kit film 110 are independent from the kit film 110 when used. There is one that can be peeled off in a state and attached to a vehicle window glass.
As another film antenna 200, as shown in FIG. 10, a plurality of antenna portions 210 are attached to one sheet-like film 220, and a release sheet 230 attached to the back surface is peeled off. There are some which are used by sticking to the window glass in the state of sheets.
[0003]
[Problems to be solved by the invention]
However, in the case of the former film antennas 120, although a plurality of film antennas 120 can be freely attached to appropriate positions selected for each of them, the film antennas 120 must be attached to the vehicle window glass a plurality of times. The installation time was required.
Also, in the case of the latter film antenna 200, the antenna having a plurality of antenna sections 210 can be attached to the vehicle window glass at a time and the installation time is not required, but the plurality of antenna sections 210 are individually formed on the vehicle window glass. Could not be placed in the free selection position.
[0004]
The present invention has been made in view of the above situation, and a main problem thereof is to provide a film antenna excellent in compatibility with various use conditions and excellent convenience.
[0005]
[Means for Solving the Problems]
The film antenna according to the first aspect of the present invention is characterized in that a film main body to be attached to a vehicle window glass is provided with a plurality of antenna portions each having a reception pattern in the form of a foil wire, and each terminal portion of the antenna portions is connected to one end of the film main body. In a configuration in which the antenna unit is disposed and attached in a state of being located at the side peripheral portion, the antenna unit is provided between one of the antenna unit attachment regions provided with at least one antenna unit and the other antenna unit attachment region provided with another antenna unit. The point is that a film cutting area for separating the areas is provided.
[0006]
According to the above-mentioned characteristic configuration, even if the film main body is cut in the film cutting area, since the terminal portion of each antenna portion is located at the peripheral edge on one end side of the cut film main body, regardless of whether the terminal is cut in the film cutting area. It is possible to adopt a form in which the terminal portion of each antenna portion is positioned at the peripheral portion of the vehicle window glass and a cable is connected to the terminal portion from the vehicle window glass frame portion, whereby one antenna portion provided with at least one antenna portion is provided. An attachment form in which a film antenna which is not separated from the attachment area and the other antenna section attachment area provided with the other antenna section in the cutting area is attached to the vehicle window glass, and one antenna section attachment area and the other Separate the antenna mounting area from the area where the antenna is installed at the cutting area to make them independent film antennas and attach them to the corresponding vehicle window glass And attaching form that can be chosen freely depending on the use conditions.
[0007]
Therefore, when it is not necessary to disperse and arrange a plurality of antenna units at appropriate positions on the vehicle window glass, a sticking form that does not separate in the cutting area can be adopted to save installation time, and Conversely, when it is necessary to disperse and dispose each of the antenna sections at an appropriate position on the vehicle window glass, it is possible to adopt a sticking form in which the antenna section is cut off in the cutting area and meet the need. In this respect, the responsiveness and convenience corresponding to various use conditions can be enhanced as compared with the above-described conventional film antenna.
[0008]
A characteristic configuration of the film antenna according to the second aspect of the present invention is that the film cutting region is arranged and formed so as to linearly traverse the film main body.
[0009]
According to the above-mentioned characteristic configuration, the film main body can be cut linearly, so that the cutting operation is simple, and the film is hardly damaged.
[0010]
A feature of the film antenna according to the third aspect of the present invention is that the film cutting area is provided with mark means for indicating a cut-off portion.
[0011]
According to the above-mentioned characteristic configuration, the mark means can be reliably recognized without being lost as the index, and the film body can be quickly separated in the cutting area using the mark means as the index. Easy to use.
[0012]
Here, the mark means means a line such as a straight line, a broken line, various dotted lines, various chain lines, various wavy lines, etc., which are printed on the film surface, for guiding and guiding the cut-off portion of the cutting area, the end of the film. Notches or cutouts formed on the edges, cutouts formed on opposing film edges and formed in a positional relationship facing each other, small holes perforated on the film surface, marking tape adhered to the cutting area, etc. Point to.
[0013]
A feature of the film antenna according to a fourth aspect of the present invention is that the film cutting region is provided with a linear film weak portion over the entire length thereof.
[0014]
According to the above-mentioned characteristic configuration, it is possible to cut the film main body (that is, to separate the one antenna portion-attached region from the other antenna portion-attached region) in a state where the cutting region is induced to break by the fragile portion.
[0015]
In the case of attaching the film antenna to the vehicle window glass as it is, the entire surface of the film main body is attached to the vehicle window glass, and the induced breaking action of the fragile portion is disabled. So that it does not hinder use.
[0016]
Here, the film weak portion is a perforation in which a large number of small through holes are continuously formed in the film main body along a line, or a half in which a large number of small holes which do not penetrate the thickness of the film main body are continuously formed along the line. It refers to a configuration in which the film main body is easily broken and fragile, such as a cut line, a groove in which a groove that does not penetrate the thickness of the film main body is continuously formed along a line.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
[Embodiment]
Hereinafter, a film antenna A to which the present invention is applied will be described with reference to FIGS.
As shown in FIG. 1, the film antenna A is arranged in parallel with a transparent rectangular sheet-shaped film body 1 made of a resin such as polyester, acrylic, polyimide, or polycarbonate along the longitudinal direction of the film body 1. First and second antenna portions B1 and B2, which are two antenna portions each having a foil-line reception pattern, are additionally provided. The film antenna A has first and second antenna portions B1 and B2 attached to the surface of a film body 1 and an adhesive layer 2 provided with an adhesive on the back surface of the film body 1. ing. On the pressure-sensitive adhesive layer 2, a release sheet 3 that is surface-bonded over the entire surface is attached.
[0018]
The film main body 1 has a first antenna portion attachment region A1 which is a long one antenna portion attachment region where the first antenna portion B1 is attached, and a short other antenna portion attachment region where the second antenna portion B2 is attached. It is divided into a certain second antenna part attaching area A2, and a film cutting area C for separating these areas is provided between the first antenna part attaching area A1 and the second antenna part attaching area A2. It is.
[0019]
In the first and second antenna portions B1 and B2, terminal portions B3 and B4 to be connected to an antenna coaxial cord 10 described later are respectively arranged in a state of being located at one end side peripheral portion 1a of the film main body 1. Specifically, first and second antenna portions B1 and B2 are provided along the longitudinal direction of the film main body 1, and one end side peripheral edge of the film main body 1 extending in one direction orthogonal to the longitudinal direction of the film main body 1. The terminal portions B3, B4 of the antenna portions B1, B2 are arranged on the extending portions A3, A4, which are the portions 1a.
[0020]
The film main body 1 has, for example, an elongated rectangular shape with a long side of 374 mm and a short side of 39 mm. The extension length of each extension A3, A4 is about 20 mm, and the film thickness is about 0.1 mm. It has a dimensional shape. With respect to the vehicle window glass G, extension portions A3 and A4 of the film main body 1 are attached to an area of about 20 mm near the window edge, and an antenna coaxial cable 10 described later is attached to these extension portions A3 and A4. It is configured to be. In a recent automobile such as a passenger car, a masking area G1 is provided at a peripheral portion of a vehicle window glass G at a portion near a window edge of about 20 mm in order to hide a portion attached to a window glass frame from being exposed. As a result, the extension portions A3 and A4 of the film antenna A are positioned and adhered to the masking area G1 on the driver's cab side. Generally, a makeup interior (not shown) is provided in the masking area G1 on the inside of the driver's cab, and the extensions A3 and A4 can be hidden and invisible.
[0021]
The first antenna section attaching area A1 is, for example, formed in a rectangular shape having a long side of 266 mm and a short side of 39 mm, and the second antenna section attaching area A2 is, for example, a rectangle having a long side of 108 mm and a short side of 39 mm. It is formed in a shape.
[0022]
The first and second antenna units B1 and B2 are each made of a known conductive ink such as a mixture of an ink medium and a metal powder such as copper, aluminum, or silver, for example, VHF: 1 to VHF: 1. 12ch, UHF: 13 to 62ch, FM: An antenna element pattern capable of receiving a wavelength component in a frequency band of 76 to 90 MHz or the like is applied to the film main body 1 by printing such as silk printing so as to form a 1 mm-wide band-like line. I have.
[0023]
Here, the first and second antenna sections B1 and B2 attached to the film main body 1 have an antenna configuration capable of receiving any one of frequency bands such as VHF, UHF, FM, and GPS, or VHF and UHF. , FM, GPS, and other frequency bands.
[0024]
As shown in FIGS. 1 and 2, the first antenna portion B1 in the first antenna portion attachment area A1 has a rectangular loop-shaped antenna element portion a in which a loop start end and a loop end are connected to a terminal portion B3. A parallel antenna element part b straddling the rectangular loop antenna element part a is connected in parallel to one side of the terminal part side of the antenna element part a, and a small rectangular one-sidedly provided at the center of the rectangular loop antenna element part a The loop-shaped antenna element portion c is connected in a tangential state to the center portions of the two loops a and c on the terminal side, and standing waves of different lengths in a plurality of set frequency bands are provided by antenna grounding by a ground plate 12 described later. A ground-type antenna such as a portable antenna is configured.
[0025]
In the second antenna portion B2 in the second antenna portion attachment area A2, the loop start end and the loop end of the rectangular loop-shaped antenna element portion d are connected to the terminal portion B4. A parallel antenna element part e straddling a rectangular loop-shaped antenna element part d is connected in parallel to one side, and a grounding type antenna in which standing waves of different lengths in a set frequency band are superimposed by grounding by a ground plate 12 described later. Is configured.
[0026]
As shown in FIG. 3, the first and second antenna portions B1 and B2 are coated with a coating layer 4 of acrylic or polyester resin except for the terminal portions B3 and B4, and the antenna portions B1 and B2 are formed. Are not oxidized or corroded by the external environment.
[0027]
The pressure-sensitive adhesive layer 2 is coated with an acrylic pressure-sensitive adhesive by printing such as roll printing or roll coater printing. The release sheet 3 is formed from resin-coated paper or a resin sheet that has been subjected to a hard coat treatment or a surface smoothing treatment.
[0028]
The film cutting area C is formed at the boundary between the adjacent first antenna section attaching area A1 and the second antenna section attaching area A2 so as to linearly longitudinally traverse the film main body 1. In the region C, a linear film fragile portion D is provided over the entire length.
[0029]
The film weak portion D of this embodiment is constituted by perforations D1 that continuously form a large number of small through holes in the film main body 1 along the film cutting region C along the line shape. In this embodiment, a perforation D1 is also formed on the release sheet 3 provided on the back surface of the film main body 1 so as to continuously form a large number of small through holes in a linear manner.
[0030]
The film cutting area C is provided with a mark means E for indicating a cut-off portion.
[0031]
The marking means E of this embodiment is formed by V-shaped notches 1b, 1b in plan view, which are formed on the film edge 1a, which is the peripheral edge of the one end side of the film main body 1, and are formed so as to face each other. By separating the cutting area C following the opening of the film main body 1 from one notch 1b, the cutting area C is induced and broken through the perforation forming the film weak part D, The separation sheets 3 can be easily separated from each other in a state where the release sheets 3 are attached to the back surfaces of the first antenna portion attachment region A1 and the second antenna portion attachment region A2.
[0032]
In the film antenna A in this embodiment, for example, as shown in FIGS. 4 to 8, the center conductor 10 </ b> A of the pair of antenna coaxial cables 10, 10 is connected to the pair of terminal portions B <b> 3, B <b> 4 of the film main body 1. , 10A are connectable via connecting portions 10B, 10B, and are connected to signal input terminals F1, F1 of an amplifier F connected to a receiving device K such as a tuner in a radio R, a television T, or the like. The other ends of the central conductor wires 10A, 10A of the pair of antenna coaxial cables 10, 10 are connectable via pin plugs 10C, 10C.
[0033]
In the pair of antenna coaxial cables 10, 10, only the center conductor wires 10A, 10A are grouped via an insulator 10D at an intermediate portion, and shield wires (outer shell conductors) 10E, 10E are formed at the intermediate portion. An earth plate 12 is connected to the divided shield wire 10Ea on the pin plug side via an earth wire 11, and a heat-shrinkable tube 10F is sheathed on the outermost shell portion of the intermediate portion so as to straddle the split portion. I have. The connection parts 10B, 10B are provided with a connection piece 10b at the center of the mounting surface of the capsule-shaped case 10G, and a double-sided tape 10c is adhered around the connection piece 10b to form a terminal. In a state where the connection portions 10B, 10B are adhered to the portions B3, B4, the terminal portions B3, B4 and the connection pieces 10b, 10b are in a contact state. Although not shown, a double-sided tape 12a is attached to one side of the ground plate 12, and a release paper is attached when not in use. Similarly, a release paper is also attached to the connection piece 10b of the connection portion 10B before the attachment.
[0034]
With such a configuration, the first antenna portion attachment region A1 having the first antenna portion attached thereto and the second antenna portion attachment region A2 having the second antenna portion attached thereto are not separated by the cutting region C as they are. In this state, the film antenna A is attached to the vehicle window glass G, and the first and second antenna sections A1 and A2 are separated by a cutting area C to form independent first antenna sections. The attachment mode in which the attachment area A1 and the second antenna section attachment area A2 are attached to the vehicle window glass G can be selectively used.
[0035]
Next, a procedure for attaching the film antenna A having the above-described configuration to, for example, a vehicle window glass G inside a front window of a wagon vehicle, an RV vehicle, and a wagon vehicle will be described.
[0036]
First, as an example, regarding a bonding mode in which the film antenna A in a state where the first antenna unit attaching region A1 and the second antenna unit attaching region A2 are not separated at the cutting region C is attached to the vehicle window glass G, As shown in FIGS. 4, 5 (a), and 6, a case will be described in which the film antenna A is stuck on one of the left and right sides of the upper side of the front window which is the vehicle window glass G.
[0037]
One glass surface (the left side in the drawing) on the upper left and right sides of the front window G is made wet by spraying or the like, the release sheet 3 is peeled off from the film antenna A, and the film antenna A is moved along the upper window frame H1. Attach the film antenna A with the terminal portions B3 and B4 facing the window frame H1 side. In this state, the adhesion position is adjusted using sliding by water, and the glass surface and the film antenna A are attached with a cloth or the like. After the water in the gap is wiped out to extrude, the water in the gap is naturally evaporated, whereby the film antenna A can be adhered to the glass surface via the adhesive layer 2. When the glass surface of the adhered portion is dirty, the glass surface can be cleanly adhered by previously washing the glass surface with washing water diluted with a neutral detergent.
[0038]
Then, the antenna F is connected to the amplifier F via the respective antenna coaxial cords 10.10, and the grounding plate 12 is attached to the window vertical frame H2, thereby completing the mounting operation.
[0039]
On the other hand, the first and second antenna-attached areas A1 which are cut film bodies configured as independent film antennas by separating the first and second antenna-attached areas A1 and A2 at the cutting area C, respectively. As an example, the first antenna unit attachment area A1 is attached to one of the upper left and right sides of the front window G as shown in FIGS. The case where the second antenna unit attachment area A2 is attached to the glass surface on the upper end side of the vertical frame of the front window G will be described.
[0040]
One of the glass surfaces (the left side in the drawing) on the upper left and right sides of the front window G and the glass window surface G on the upper side of the vertical side of the front window G are previously wetted by spraying or the like. I do.
[0041]
The first antenna section attaching area A1 and the second antenna section attaching area A2 are cut in the cutting area C along the film weak part D together with the release sheet 3 in a divided state.
[0042]
Next, the release sheet 3 is peeled off from the first antenna portion attaching area A1, and is made substantially parallel to the vicinity of the window upper frame H1 with respect to any one of the glass surfaces on the upper left and right sides of the wet front window G. At the same time, the first antenna unit attaching area A1 is attached to the upper window frame H1 side with the terminal portion B3 facing, and in this state, the attaching position is adjusted using sliding by water, and a glass surface is attached with a cloth or the like. The water in the gap between the first antenna unit attaching area A1 and the first antenna unit attaching area A1 is wiped so as to be extruded, and the first antenna unit attaching area A1 is adhered to the glass surface via the adhesive layer 2.
[0043]
Next, the release sheet 3 is peeled off from the second antenna portion attaching area A2, and the glass sheet on the upper end side of the vertical side of the front window G in a wet state is arranged substantially parallel to the vicinity of the window vertical frame H2, The second antenna section attachment area A2 is adhered with the terminal portion B4 facing the frame H2 side, and in this state, the adhesion position is adjusted using sliding by water, and the glass surface and the attachment area A2 are adjusted with a cloth or the like. Then, the water in the gap is wiped out so as to be pushed out, and the second antenna portion attaching area A2 is adhered to the glass surface via the adhesive layer 2.
[0044]
Then, the antenna F is connected to the amplifier F via the respective antenna coaxial cords 10.10, and the grounding plate 12 is attached to the window vertical frame H2, thereby completing the mounting operation.
[0045]
Although FIGS. 4 and 5 have been described up to the point where the film antenna A is attached to the upper left corner or the upper left corner of the front window G, the front window is often symmetrical. Another film antenna A (shown by a two-dot chain line) having the same configuration is attached to the upper right corner or the upper left corner of the antenna, and although not shown, the pin plugs 10C, 10C of the antenna coaxial cord 10.10 are similarly formed. Is connected to an amplifier F, so that the left or right film antenna A having a better reception state is always selected and used as a diversity antenna capable of improving reception quality.
[0046]
[Other embodiments]
1) In the above-described embodiment, the first antenna unit attaching region A1 which is one of the antenna unit attaching regions provided with one first antenna unit B1, and the one second antenna unit B2 corresponding to the first antenna unit attaching region A1 are provided. The example in which the film main body 1 is divided into the two divided film main bodies by providing the film cutting area C between the second antenna part mounting area A2 which is the other attached antenna part mounting area has been described. However, the present invention is not limited to this. By using the configuration of the present invention, there is two or more correspondences between one antenna attachment area and the other antenna attachment area, and each one of the antenna attachment areas has a corresponding relationship. The film body may be divided into three or more divided film bodies by separating the film cutting area provided between the area and the other antenna section attaching area.
In this case, the divided antenna unit attachment area may be one in which one antenna unit is attached as in the above embodiment, or one in which one or more antenna units are attached. Good.
[0047]
2) In the above-described embodiment, one of the antenna-attached regions (first antenna-attached region A1) and the other antenna-attached region (second antenna-attached region A2) of the above-described embodiment are formed by the longitudinal direction of the film body 1. The present invention is not limited to this. For example, even if they are provided along a direction orthogonal to the longitudinal direction of the film main body 1, the present invention is not limited thereto. 1 and the attachment along a direction orthogonal to the longitudinal direction of the film body 1 may be mixed.
[0048]
3) In the above embodiment, the terminal portions B3, B4 of the antenna portions B1, B2 are arranged on the extension portions A3, A4, which are peripheral edges 1a on one end side extending in a direction orthogonal to the longitudinal direction of the film main body 1. However, the present invention is not limited to this, and they may be arranged at an extension portion which is a peripheral edge on one end side extending along the longitudinal direction of the film main body 1.
[0049]
4) In the above-described embodiment, an example in which the film main body 1 can be adhered to the vehicle window glass G via the adhesive layer 2 provided in advance on the back surface of the film main body 1 is not limited thereto. Instead of providing the layer 2, when attaching to the vehicle window glass G, it may be attached to the vehicle window glass via an adhesive.
[0050]
5) In the embodiment described above, the perforation D1 which is the film weak portion D is formed on the film main body 1 and the perforation D1 is also formed on the release sheet 3. However, the present invention is not limited to this. The perforation D1 which is a film weak part D may be formed, and the peeling sheet 3 may not have the perforation D1.
In this case, the peeling sheet 3 can induce and break the antenna-attached areas through the film weak part D as it is.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a film antenna of the present invention, (a) is a front view of the film antenna, (b) is a rear view of the film antenna, FIG. 2 is a perspective view showing the entire film antenna, and FIG. FIG. 4 is an explanatory view showing a state in which the film antenna is attached to the vehicle window glass. FIG. 5 is an explanatory view showing a state in which the film antenna is attached to the vehicle window glass. Explanatory drawing showing a state in which a film antenna in a state where it is not separated from a second antenna section attaching area by a cutting area is attached to a vehicle window glass. (B) First antenna section attaching area and second antenna section attaching area FIG. 6 is an explanatory diagram showing a bonding mode in which the film antenna and the antenna coaxial cord are separated from each other at a cutting area to be formed into independent film antennas and attached to the corresponding vehicle window glass. FIG. 7 is an explanatory view showing a relationship between a film antenna and an antenna coaxial cord. FIG. 8 is a sectional view of a main part of an antenna coaxial cord. FIG. 9 is a simplified perspective view showing a conventional film antenna. FIG. 10 is a simplified perspective view showing a conventional film antenna.
A film antenna A1 first antenna attachment area (one antenna attachment area where at least one antenna is attached)
A2 Second antenna attachment area (the other antenna attachment area where another antenna is attached)
B1 First antenna unit (antenna unit)
B2 2nd antenna part (antenna part)
C Film cutting area D Film fragile portion E Marking means 1 Film main body 1a Film edge (peripheral edge of one end of film main body)

Claims (4)

A film in which a plurality of antenna portions each having a foil-shaped reception pattern are arranged and attached to a film main body to be attached to a vehicle window glass in such a manner that terminal portions of the antenna portions are located on one end side peripheral portion of the film main body. An antenna, wherein at least one antenna unit is provided with one antenna unit provided region and another antenna unit provided with another antenna unit is provided with a film cutting region for separating the regions from each other. Film antenna provided. 2. The film antenna according to claim 1, wherein the film cutting area is arranged and formed so as to linearly traverse the film body. 3. The film antenna according to claim 1, wherein a mark means for indicating a cut-off portion is provided in the film cutting area. The film antenna according to claim 1, wherein the film cutting region is provided with a linear film weak portion over the entire length thereof.

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