JP2000341020A - On-vehicle film antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle film antenna that can easily be mounted on a vehicle without losing the outward appearance of the vehicle. SOLUTION: A belt-like transparent film 14 has a wide part 11 and a narrow part 10 and the narrow part 10 is connected to one side of the broad part 11 in its cross direction. An adhesive layer to be adhered to a front glass plate 3 is formed on one face of the film 14, and an antenna conductor 15 is formed on the other face through pattern print. The antenna conductor 15 is extended linearly in the narrow part and placed in zigzag in the wide part. The film antenna 1 is adhered from the interior of the vehicle to a side of the front glass plate 3. In this case, a side edge 23 at the other side of the wide part 11 in its width direction is placed and adhered in parallel with a front pillar 17 with a very smaller clearance. Thus, the side edge of the narrow part 10 is placed at a position apart from the front pillar 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted film antenna used by being attached to a window glass of an automobile.

[0002]

2. Description of the Related Art A vehicle-mounted film antenna is used by attaching an antenna conductor wire to a strip-shaped transparent film and attaching the film to, for example, a windshield of an automobile.
In the film antenna, a band-shaped film is attached along the periphery of the window glass so as not to hinder the view.

[0003]

Although the strip-shaped film is transparent, when it is attached to a window glass, the peripheral edge of the film appears in a linear shape and is visually recognized. Since the strip-shaped film is stuck along the periphery of the window glass, the line of the periphery of the film is parallel to the periphery of the window glass. At this time, if the film is shifted and attached, the periphery of the film and the periphery of the window glass are not parallel, and the appearance is poor.

Usually, the interval between the film and the periphery of the window glass is a small interval of about several mm. As described above, the smaller the interval, the more clearly it is recognized whether or not the parallelism is made. Therefore, the work of attaching the antenna must be carefully performed so that the film is not shifted and attached, and the working efficiency is deteriorated.

Further, since the windshield is not a flat surface but a curved surface, it is very difficult to accurately attach a film to such a curved glass at a predetermined position.

Conventional techniques similar to such a vehicle-mounted film antenna are disclosed in JP-A-61-82502, JP-A-7-122919, JP-A-7-122920 and JP-A-1
Although it is disclosed in Japanese Patent Application Laid-Open No. 0-308620 or Japanese Patent Application Laid-Open No. H11-17595, there is no description about a method for solving the above-mentioned problem.

[0007] It is an object of the present invention to provide a vehicle-mounted film antenna capable of easily attaching the film antenna to a window glass without deteriorating aesthetic appearance.

[0008]

According to a first aspect of the present invention, there is provided a transparent strip-shaped film having electrical insulation, and an antenna conductor linearly disposed on the film. In a vehicle-mounted film antenna attached along the periphery of a window glass of an automobile, the band-shaped film includes a wide portion and a width detail, and the width detail continues to one side in the width direction of the wide portion, and the width of the wide portion. The vehicle-mounted film antenna is characterized in that the other side in the direction is arranged close to the periphery of the window glass, and one side in the width direction of the wide portion and the details of the width are arranged away from the window glass.

According to the present invention, the strip-shaped transparent film is composed of a wide portion and a width detail, and the width detail continues to one side in the width direction of the wide portion. This film is the width direction end side of the wide part,
That is, it is affixed to the window glass such that the side where the width details are not provided is close to the periphery of the window glass. Thus, the width details are arranged parallel to the periphery of the windowpane at a position away from the periphery of the windowpane. Therefore, the entire length of the band-shaped film is not arranged at a position close to the periphery of the window glass, but only the periphery on one side in the width direction of the wide portion is arranged at a position close to the periphery of the window glass, and the remaining width details are not changed. Is arranged away from the periphery of the window glass, so that even if the film is stuck off, it is difficult for a viewer to recognize it and the appearance is prevented from being degraded. Therefore, the pasting operation may be performed with care being taken so that only the periphery of the wide portion is parallel to the periphery of the window glass, and the working efficiency is improved. Further, since the antenna is attached to the window glass, the antenna can be attached later.

The antenna conductor according to the second aspect of the present invention is characterized in that the antenna conductor extends in the longitudinal direction when the width of the film is small, and is bent plural times in the width direction at the wide portion, and is arranged in a zigzag shape. I do.

According to the present invention, since the antenna conductor is folded back in a zigzag shape at the wide portion, the length of the film can be shortened. Can be arranged.

According to a third aspect of the present invention, an adhesive layer for attaching to a window glass is formed on one surface of the film, and an antenna conductor is provided on the other surface, and a transparent layer covering the antenna conductor is provided. Is formed by printing.

According to the present invention, since an adhesive layer is formed on one surface side of the film, it can be easily attached to a window glass. Further, an antenna conductor is provided on the other surface side of the film, and a transparent layer is formed by printing so as to cover the antenna conductor, thereby protecting the antenna conductor and improving rust prevention. Further, since this transparent layer is formed by printing, it can be easily and accurately formed.

According to a fourth aspect of the present invention, the printing of the transparent layer is performed only on the antenna conductor and its peripheral portion.

According to the present invention, since the transparent layer is formed only on the antenna conductor and its peripheral portion, it is possible to suppress a decrease in the transparency of the film as much as possible.

According to a fifth aspect of the present invention, an adhesive layer for attaching to a window glass is formed on one surface of the film, and an antenna conductor is provided on the other surface. The film is stuck.

According to the present invention, a transparent cover film is adhered over the antenna conductor, thereby protecting the antenna conductor, improving the strength of the film antenna, and preventing rust and breakage of the antenna conductor. .

The film of the present invention according to claim 6 is:
It is characterized in that it is attached to the indoor side of window glass.

According to the present invention, since the film antenna is provided on the indoor side, it is not necessary to perform a weathering treatment, and the production cost can be suppressed. Further, it is easy to draw the end of the antenna film between the vehicle body and the interior material.

According to a seventh aspect of the present invention, one end in the longitudinal direction of the film is drawn between the vehicle body and the interior material,
A power supply terminal for supplying power is formed in the drawn-in portion.

According to the present invention, since the feed portion of the antenna is provided on the vehicle body side and only the transparent film and the linear antenna conductor are provided in the opening of the window glass, the feed portion is provided in the opening. And the appearance is prevented from deteriorating.

The adhesive layer formed on the film of the present invention according to claim 8 is provided only on a portion to be attached to a window glass.

According to the present invention, since the film is provided from the window glass to the vehicle body, when the adhesive layer is formed on the entire surface of the film, the film is attached to both the window glass and the vehicle body, and the film is attached. Although the work becomes difficult, in the present invention, since the adhesive layer is provided only on the portion to be attached to the window glass, the work of attaching the film becomes easy.

The adhesive layer formed on the film of the present invention according to claim 9 is formed on one entire surface of the film,
In order to protect the adhesive layer of the film before being attached to the window glass, a release sheet covering the adhesive layer is provided, and this release sheet is at least at the boundary between the portion attached to the window glass and the portion drawn into the vehicle body. It is characterized by being divided.

According to the present invention, a release sheet is provided in advance on the adhesive layer of the film, and the release sheet is divided at a boundary between a portion to be attached to the window glass and a portion to be drawn into the vehicle body. Therefore, first peel off the release sheet on the part to be attached to the window glass, paste the film on the window glass while leaving the release sheet on the part pulled into the vehicle body, and then peel off the remaining release sheet and paste the film on the vehicle body . By dividing the release sheet in this way and dividing the sticking operation into two stages, the film sticking operation becomes easy.

According to a tenth aspect of the present invention, the power supply terminal is formed in a planar shape and is continuous with an end of the antenna conductor. The power supply coaxial cable connected to the power supply terminal includes an internal conductor of the power supply coaxial cable. A power supply connector to which the terminal is connected is attached, and the terminal of the power supply connector and the power supply terminal are connected by pressure contact.

According to the present invention, since the terminal of the power supply connector of the power supply coaxial cable and the power supply terminal of the antenna conductor are pressed and connected, the connection can be made well without soldering.

The eleventh aspect of the present invention is characterized in that an outer conductor of the power supply coaxial cable is screwed to a vehicle body and grounded.

According to the present invention, the outer conductor of the coaxial cable is screwed to the vehicle body so that the metal portion of the vehicle body and the outer conductor of the coaxial cable can be connected to each other even if the vehicle body is painted. Can be electrically connected and grounded reliably. Even if an external force acts, it cannot be easily removed.

A grounding connector to which a terminal is connected to an outer conductor of the power supply coaxial cable of the present invention according to claim 12, wherein the grounding connector is mounted on a metal part of the vehicle body which is exposed by removing the paint on the vehicle body. Are grounded by pressing the terminals.

According to the present invention, by connecting the portion of the vehicle body from which the paint has been removed to the terminal of the grounding connector by pressing, the grounding can be performed well without soldering or the like.

In the power supply coaxial cable according to the present invention, a grounding connector to which a terminal is connected to an outer conductor of the power supply coaxial cable is attached, and a conductor sheet is adhered from a painted body. The terminal of the grounding connector is pressed into contact with the conductor sheet to be grounded.

According to the present invention, a capacity is formed between the conductor sheet and the vehicle body by attaching the conductor sheet to the painted vehicle body. Therefore, the terminal can be grounded by pressing the terminal to the conductor sheet and attaching the connector. In this way, it is possible to ground without removing the paint, and the mounting work of the film antenna becomes very simple.

According to a fourteenth aspect of the present invention, the antenna conductor is formed by printing a conductive paste.

According to the present invention, by forming the antenna conductor by printing, it is possible to form the antenna pattern accurately and quickly even in a zigzag pattern.

According to a fifteenth aspect of the present invention, the antenna conductor comprises a conductor wire.

According to the present invention, the DC resistance can be reduced and the antenna sensitivity can be improved by forming the antenna conductor by a conductor wire.

[0038] The window glass of the present invention according to claim 16 is a windshield.

According to the present invention, for example, a defogger (anti-fog) conductor is provided on the rear glass, and this conductor may interfere with the antenna wire. In the present invention, a film antenna is provided on the windshield. Thus, such interference can be prevented and good reception can be achieved.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing a use state of a film antenna 1 for a vehicle which is an embodiment of the present invention, and FIG. 2 is a VICS using the film antenna 1.
FIG. 2 is a block diagram showing a configuration of a (Vehicle Information and Communication System) device 2. The film antenna 1 is a quarter-wave monopole antenna, is attached to the left side of the windshield 3 from the interior side of the automobile, and the end is pulled into the interior material of the front pillar 17 and is pulled in. Power is supplied from the end. This antenna 1 has a center frequency of 83 MHz and 76 to 90 MHz.
, And is used as an antenna of the VICS device 2 in the present embodiment.

As shown in FIG. 2, the VICS device 2 comprises a film antenna 1, an antenna amplifier 4, a VICS tuner 5, a navigation unit 6, and a display 7, and converts a signal received by the film antenna 1 into an antenna amplifier 4. , And demodulated by VICS tuner 5,
The display unit 7 displays the received traffic information such as traffic information together with the map information stored in the navigation unit 6.

FIG. 3 is a front view showing the film antenna 1. The film antenna 1 includes a strip-shaped transparent film 14 and an antenna conductor 15 linearly disposed on the film 14. The film 14 includes a band-shaped antenna unit 12 attached to an opening of the windshield 3,
One end in the longitudinal direction of the antenna unit 12 (the upper end in FIG. 3)
12a, which extends vertically from 12a and is drawn into the vehicle body.

The antenna section 12 is provided at the other end in the longitudinal direction (FIG. 3).
The lower portion 12b includes a wide portion 11b and a narrow portion 10 on one end portion 12a side. The narrow portion 10 is connected to one side (right side in FIG. 3) 11a of the wide portion 11 in the width direction. That is, the side edge 21 of the width direction one side 11a of the wide part 11 and the side edge 22 of the width direction one side 10a of the width detail 10 are linearly connected, and the side edge 23 of the width direction other side 11b of the wide part 11 is , Width detail 1
0 and the side edge 24 of the other side 10b in the width direction via a step 25.

The lead-in portion 13 extends from the end of the narrow portion 10 to the other side in the width direction, and a feed terminal 20 connected to the antenna conductor 25 is formed at the tip of the lead-in portion 13.
A power supply coaxial cable is connected to the power supply terminal 20 as described later.

FIG. 4 is a sectional view taken along line IV-IV of FIG. The film 14 is made of a synthetic resin having a light transmitting property and an electrical insulating property, in this embodiment, polyester, and has a thickness of 0.075 mm. This film 1
An adhesive layer 30 to be attached to the windshield 3 is formed on one surface 14 a of the front glass 4. The adhesive layer 30 is formed by applying an adhesive to the entire surface 14 a of the film 14. The adhesive layer 30 is covered with a release sheet 31 to protect the adhesive layer 30 before the film 14 is attached to the windshield 3.

The antenna conductor 15 is provided on the other surface 14b of the film 14. The antenna conductor 15 is formed by pattern-printing a conductive paste made of silver on the other surface 14b of the film 14. As shown in FIG. 3, the antenna conductor 15 extends linearly along the longitudinal direction in the lead-in portion 13 and the narrow portion 10, and is bent a plurality of times in the width direction in the wide portion 11 and arranged in a zigzag shape. By arranging the antenna conductors 15 in a zigzag shape in this way, a predetermined length of the antenna conductors 15 necessary for receiving the frequency in the FM band is secured.
The length of the film antenna 1 can be reduced, so that the film antenna can be arranged in the longitudinal direction of the windshield 3.

The power supply terminal 20 formed on the surface at the end of the lead-in portion 13 is also formed by pattern printing at the same time when the antenna conductor 15 is formed.

After forming the antenna conductor 15 and the power supply terminal 20, a transparent layer 32 is formed to cover the antenna conductor 15 as shown in FIG. The transparent layer 32 is formed only on the antenna conductor 15 and the film 14 around the antenna conductor 15 by printing a pattern of transparent ink. This prevents the transparency of the transparent film 14 from being reduced. Covering the antenna conductor 15 with such a transparent layer 32 prevents the antenna conductor 15 from rusting. The transparent layer 32
Is not formed on the power supply terminal 20, but exposes the power supply terminal 20. Therefore, before the film antenna 1 is mounted on the automobile, the exposed power supply terminal 20 is not rusted.
A rust prevention seal 33 covering the entire surface of the power supply terminal 20 is pasted. The thickness of the antenna conductor 15 and the feed terminal 20 is set to 0.25 mm.

The release sheet 31 covering the film 14 is divided at a boundary 35 between the antenna section 12 and the drawing section 13 of the film 14. The antenna section 12 of the film 14 is attached to the windshield 3, and the retracting section 13 is attached to the front pillar 17 of the vehicle body. It is difficult to attach the film 14 at one time from the windshield 3 to the pillar 17, but as described above, the release sheet 3
1 is divided at the boundary 35, so that the antenna 12
After peeling off the release sheet 31 on the side and affixing it to the windshield 3, the peeling sheet 31 of the pull-in section 13 is peeled off, and the pull-in section 13 of the film 14 is pasted on the pillar 17, whereby the film can be easily attached. The release sheet 31 on the antenna unit 12 side and the release sheet 31 on the pull-in unit 13 side are provided with peeling auxiliary pieces 36 and 37 for peeling, respectively. The peeling auxiliary pieces 36 and 37 are
For example, it is made of a piece of paper, and is attached to each release sheet 31 so as to protrude outward. At least one of the pieces in the present embodiment, the auxiliary release piece 37 on the side of the drawing-in portion 13 is attached near the boundary portion 35.

Although the release sheet 31 may be completely divided into two, in this embodiment, a cut is formed at the boundary 35 of the release sheet 31 by half cutting. Therefore,
By peeling the release sheet 31 from the film 14 with the release auxiliary piece 37 near the boundary 35, the release sheet 31 is reliably divided at the boundary 35.

The length L1 of the antenna section 12 of the film 14 is 414 mm in the present embodiment, of which the length L2 of the wide section 11 is 134 mm, the length L3 of the narrow section 10 is 180 mm, The length of the wide portion 11 is about 1/3 of the whole. The width W1 of the wide portion 11 is 38 m.
m, and the width W2 of the width detail 10 is 23 mm. Further, the length L4 of the retracting portion 13 is 57 mm. The antenna conductor 15 extends along the longitudinal direction at the central portion in the width direction in the lead-in portion 13, but extends along the longitudinal direction on the one side 10a in the width direction, that is, on the side away from the front pillar 17, in the narrow width portion 10. ing. In the wide portion 11, the antenna conductor 15 has a width of 30 mm and a width of 10 mm.
It is folded back in zigzag at intervals.

FIG. 5 is a diagram showing a method of attaching the feeder of the film antenna 1. When mounting the film antenna 1, the interior material is removed from the front pillar 17 of the vehicle body in advance. Then, as described above, the antenna unit 12 of the film 14 is first attached to the windshield 3, and then the retracting unit 13 is attached to the front pillar 17. Next, the pillar 1 below the attached pull-in portion 13
7. A conductive sheet 50 is attached on 7. The conductor sheet 50
The conductor sheet 50 is made of aluminum foil and adhered on the painted front pillar 17 of the vehicle body.
And the metal part of the vehicle body form a capacity. Therefore, it is possible to ground the conductor sheet 50 without removing the paint.

Next, the feeding coaxial cable 40 connected to the antenna amplifier 4 of the VICS device 2 is connected to the feeding portion 20 and the conductive sheet 50 of the film antenna 1. A power supply connector 43 is connected to an end of the power supply coaxial cable 40 via a covered electric wire 41 connected to an inner conductor of the power supply coaxial cable 40. Insulated wire 4 connected to conductor
2, a ground connector 44 is attached.

FIG. 6 is a side view showing the power supply connector 43. Note that the grounding connector 44 is also the power supply connector 43.
Since the configuration is the same as that described above, corresponding components are denoted by the same reference numerals and description thereof will be omitted.

The power supply connector 43 has a hollow rectangular parallelepiped connector body 51, a double-sided adhesive tape 52 attached to the bottom wall 54 of the connector body 51, and a terminal 53 attached to the center of the double-sided adhesive tape 52. The double-sided adhesive tape 52 is made of urethane having a thickness of about 1 mm, has elasticity, and is attached to the bottom wall 54 of the connector main body 51. The terminal 53 is made of a thin metal plate, is electrically connected to the insulated wire 41 in the connector main body 51, and is electrically connected to the inner conductor of the coaxial cable for power supply 40. As shown in FIG. 5, an insertion hole 55 is formed in the double-sided adhesive tape 52, the terminal 53 is inserted through the insertion hole 55, pulled out, bent, and attached to the center of the double-sided adhesive tape 52. In addition, on this double-sided adhesive tape 52,
A release sheet (not shown) is attached so as to cover the terminals 53.

The terminal 53 exposed to the outside in this manner is substantially the same size as the power supply terminal 20 of the film antenna 1, and the double-sided adhesive tape 52 and the bottom wall 54 are connected to the terminal 5
3, the adhesive tape 52 is exposed so as to surround the terminal 53. In addition, since the terminals are attached to the surface of the double-sided adhesive tape 52, the terminals 53 project from the double-sided adhesive tape 52 as shown in FIG.

As described above, since the double-sided adhesive tape 52 has elasticity, the rust-proof seal 33 is peeled off from the power supply terminal 20 of the film antenna 1, the release sheet is peeled off from the power supply connector 43, and the terminal 53 and the power supply terminal 20 are peeled off. The terminal 53 of the power supply connector 43 is pressed against the power supply terminal 20 by the resilient force of the double-sided adhesive tape 52 by sticking the power supply connector 43 such that the power supply terminal 43 contacts the power supply terminal 20 of the film antenna 1. Are pressed against each other in a state where they are in surface contact, and are reliably connected. Further, the outside of the power supply terminal 20 and the terminal 53 is a double-sided adhesive tape 52 on the film 1.
4, the terminals 20 and 53 are not exposed to the outside when the connector 43 is attached, so that rusting is prevented. In this manner, the feeding coaxial cable 40 and the film antenna can be reliably connected without soldering.

Similarly, the grounding connector 44 has the terminal 53 exposed at the center of the double-sided adhesive tape 52 at the bottom, so that the double-sided adhesive tape 52 of the grounding connector 44 is attached to the center of the conductor sheet 50. Terminal 5
3 comes into surface contact with the conductor sheet 50 and is pressed by the elastic force of the double-sided adhesive tape 52. In this way, the grounding connector 44 can be easily attached without soldering. Also, as described above, the conductor sheet 50
Since the capacitor forms a capacitance with the metal part of the vehicle body, the outer conductor of the power supply coaxial cable 40 can be electrically connected to the conductor sheet 50 to be grounded without removing the paint on the vehicle body. Also, this conductor seal 50
High corrosion resistance due to aluminum foil. The area of the conductor sheet 50 is, for example, about 15 cm ² .

Next, a method of attaching the film antenna 1 will be described. First, the interior material is removed from the front pillar 17 to which the retracting portion 13 of the film antenna 1 is pasted in advance. Next, water containing a detergent is sprayed on the portion where the film antenna 1 is to be attached. Then, the release sheet 31 of the antenna section 12 of the film antenna 1 is peeled off, and the other width direction 11b of the wide section 11 of the antenna section 12 is removed.
The side edges 23 are aligned so as to be parallel to the side edge of the windshield 3, that is, the front pillar 17 at a predetermined interval, about 5 mm in this embodiment, and are attached so as to drive out moisture. Subsequently, the width detail 10 is also applied while driving out moisture.

As described above, according to the present invention, the front pillar 1
Only a side edge 23 of the wide portion 11 having a length slightly less than 1/3 of the entire length of the band-shaped antenna portion 12 becomes parallel to the antenna portion 7 at a slight interval. Since the peripheral edge 24 of the width detail 10 having a length of three or more is arranged away from the front pillar 17, even if it is not accurately pasted parallel to the front pillar 17, it is not noticeable and has an aesthetic appearance. It can be prevented from lowering. Further, since the width detail 10 has a width of about 20 mm as described above, it can be easily and beautifully stuck without forming wrinkles or the like when sticking.

Next, the release sheet 31 b of the pull-in portion 13 is peeled off, and the pull-in portion 13 is attached to the front pillar 17. Then, as described above, the conductor sheet 50 is attached to the front pillar 17, the power supply connector 43 of the power supply coaxial cable 40 is attached to the power supply terminal 20, and the grounding connector 44 is attached to the conductor sheet 50. Then, the interior material is attached to the front pillar 17 again, and the retracted portion 13, the connectors 43 and 44, and the power supply coaxial cable 40 of the film antenna 1 are hidden under the interior material, and the mounting work of the film antenna 1 is completed. As described above, in the film antenna 1, the retractable portion 13 is retracted into the front pillar 17, so that only the pillar portion needs to be removed from the interior material. For example, in the case of being pulled into the roof side, the number of interior materials to be removed is very large, but the mounting work is much easier than this.

In the present embodiment, the film antenna 1 is attached to the windshield, but the window to be attached may be any window that is fitted to a vehicle, and may be attached to, for example, a rear glass.

In this embodiment, the film antenna is attached from the indoor side, but may be attached from the outdoor side. Further, although the retracting portion is on the pillar side, the retracting portion may be retracted on the roof side, and the sticking position is on the left side of the windshield, but may be on the right side, or on the upper or lower side.

In the film antenna 1 of this embodiment, the antenna conductor 15 is formed by pattern printing. However, as another embodiment of the present invention, the antenna conductor may be formed of a conductor wire. Thereby, the sensitivity of the antenna can be improved. Although the transparent layer 32 covering the antenna conductor 15 is formed by printing transparent ink, a transparent cover film may be attached so as to cover the entire surface of the antenna conductor from above the antenna conductor as another embodiment. As a result, the antenna conductor is less likely to be damaged, and can be attached, for example, to the outdoor side of a window glass.

In the present embodiment, the outer conductor of the power supply coaxial cable 40 is grounded using the conductor sheet 50 and the grounding connector 44. However, the present invention is not limited to such a form. By attaching a Y-shaped fitting to the insulated wire 42 connected to the outer conductor of the coaxial cable 40 and screwing this fitting to the front pillar 17,
The external conductor of the power supply coaxial cable and the metal part of the vehicle body may be electrically connected and grounded. As a result, it does not easily come off due to external force or the like. Still further, instead of such screwing, the front pillar 17
Partially peel off the paint to expose the metal part of the car body,
The grounding connector 44 used in the present embodiment may be attached to the exposed metal portion to ground. Also in this case, the terminal 53 of the grounding connector 44 is
Due to the resilience of 2, the metal part is pressed against the exposed metal part, so that it can be easily grounded without soldering or the like.

In this embodiment, the film antenna 1
Is used for the VICS device, but may be used as an FM radio antenna.

[0067]

According to the first aspect of the present invention, even when the film is staggered and is not exactly parallel to the periphery of the window glass, it is difficult for a viewer to recognize it,
The appearance can be prevented from deteriorating. Therefore, the attaching operation is facilitated, and the working efficiency is improved.

According to the second aspect of the present invention, since the antenna conductor is disposed in a zigzag manner at the wide portion, the length of the film can be shortened. It can be arranged vertically on the side.

According to the third aspect of the present invention, since the adhesive layer is formed on one surface side of the film, it can be easily attached to the window glass. Further, an antenna conductor is provided on the other surface side of the film, and a transparent layer is formed by printing over the antenna conductor, thereby protecting the antenna conductor and improving rust prevention. In addition, since this transparent layer is formed by printing, it can be formed quickly and accurately.

According to the fourth aspect of the present invention, since the printing of the transparent layer is formed only on the antenna conductor and its peripheral portion, the transparency of the film is prevented from being lowered.

According to the fifth aspect of the present invention, since the transparent cover film is adhered from above the antenna conductor, the antenna conductor is protected, thereby preventing rust and breakage of the antenna conductor.

According to the sixth aspect of the present invention, since the film antenna is provided on the indoor side, it is not necessary to perform a weathering treatment, and the manufacturing cost can be reduced.

According to the present invention, since the feeding portion of the antenna is provided on the vehicle body side and only the transparent film and the linear antenna conductor are provided at the opening of the window glass, the appearance is improved. It is prevented from lowering.

According to the present invention, since the adhesive layer is provided only on the portion to be attached to the window glass, the operation of attaching the film becomes very easy.

According to the ninth aspect of the present invention, since the release sheet is divided at the boundary between the portion to be attached to the window glass and the portion to be drawn into the vehicle body, the film attaching operation can be easily performed. it can.

According to the tenth aspect of the present invention, since the terminal of the power supply connector of the power supply coaxial cable and the power supply terminal of the antenna conductor are pressed and connected, the connection is good without soldering. be able to.

According to the eleventh aspect of the present invention, the outer conductor of the power supply coaxial cable is screwed to the vehicle body, so that it does not easily come off even when an external force acts.

According to the twelfth aspect of the present invention, the portion of the vehicle body from which the paint is removed and the terminal of the grounding connector are pressed and connected to each other, so that good grounding can be performed without soldering or the like. It becomes possible.

According to the thirteenth aspect of the present invention, the terminals exposed on the conductor sheet attached to the painted vehicle body are pressed against each other, and the grounding connector is attached to the conductor sheet.
The grounding can be performed without removing the paint, and the mounting work of the film antenna becomes very simple.

According to the fourteenth aspect of the present invention, by forming the antenna conductor by printing, it is possible to form the antenna pattern accurately and quickly even in a zigzag pattern.

According to the fifteenth aspect of the present invention, since the antenna conductor is formed of the conductor wire, the sensitivity of the antenna is improved.

According to the sixteenth aspect of the present invention, by providing the film antenna on the windshield, it is possible to receive signals satisfactorily without interference with the defogger.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a use state of a vehicle-mounted film antenna 1 according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a VICS device 2 using a vehicle-mounted film antenna 1;

FIG. 3 is a plan view of the film antenna 1. FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1;

FIG. 5 is a diagram illustrating a method of attaching a power supply unit of the film antenna 1.

6 is a side view of the power supply connector 43. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film antenna 3 Windshield 10 Width detail 11 Wide part 14 Film 15 Antenna conductor 20 Power supply terminal 30 Adhesive layer 31 Release sheet 32 Transparent layer 40 Power supply coaxial cable 50 Conductor sheet 53 Terminal

Continued on the front page (72) Inventor Naoki Hisashima 1-2-28 Goshodori, Hyogo-ku, Kobe-shi, Hyogo F-term in Fujitsu Ten Limited (Reference) 5J046 AA00 AA09 AB17 LA19 LA20 PA04

Claims (16)

[Claims] 1. An in-vehicle vehicle, comprising: a transparent strip-shaped film having electrical insulation; and an antenna conductor linearly disposed on the film, wherein the film is adhered along a periphery of a window glass of an automobile. In the film antenna, the band-shaped film is composed of a wide portion and a width detail, and the width detail is connected to one side in the width direction of the wide portion, and the other side in the width direction of the wide portion is disposed close to the periphery of the window glass. A film antenna for mounting on a vehicle, wherein one side in the width direction of the wide portion and details of the width are arranged away from the window glass. 2. The antenna conductor according to claim 1, wherein the antenna conductor extends along the longitudinal direction in a narrow portion of the film, and is bent plural times in the width direction in a wide portion, and is arranged in a zigzag shape. Automotive film antenna. 3. An adhesive layer for attaching to a window glass is formed on one surface of the film, and an antenna conductor is provided on another surface, and a transparent layer is formed by printing over the antenna conductor. The film antenna for a vehicle according to claim 1 or 2, wherein: 4. The on-vehicle film antenna according to claim 3, wherein the printing of the transparent layer is performed only on the antenna conductor and a peripheral portion thereof. 5. An adhesive layer for attaching to a window glass is formed on one surface of the film, an antenna conductor is provided on the other surface, and a transparent cover film is attached on the antenna conductor. The vehicle-mounted film antenna according to claim 1 or 2, wherein 6. The film according to claim 3, wherein the film is affixed to an indoor side of a window glass.
3. The film antenna for vehicles according to any one of the above. 7. The film according to claim 6, wherein one end in the longitudinal direction of the film is drawn between the vehicle body and the interior material, and a feeding terminal for feeding power is formed in the drawn portion. The film antenna for in-vehicle use as described. 8. The in-vehicle film antenna according to claim 7, wherein the adhesive layer formed on the film is provided only on a portion to be attached to a window glass. 9. The adhesive layer formed on the film is formed on one entire surface of the film, and a release sheet covering the adhesive layer is provided to protect the adhesive layer of the film before attaching to the window glass. The vehicle-mounted film antenna according to claim 7, wherein the release sheet is divided at least at a boundary between a portion to be attached to the window glass and a portion to be drawn into the vehicle body. 10. The power supply terminal is formed in a planar shape, is connected to an end of an antenna conductor, and a power supply coaxial cable connected to the power supply terminal has a terminal connected to an internal conductor of the power supply coaxial cable. The vehicle-mounted film antenna according to any one of claims 7 to 9, wherein a connector for the power supply is attached, and a terminal of the power supply connector and the power supply terminal are connected by pressure contact. 11. The in-vehicle film antenna according to claim 10, wherein an outer conductor of the coaxial cable for feeding is screwed to a vehicle body and grounded. 12. A grounding connector to which a terminal is connected to an outer conductor of the coaxial cable for power supply is attached, and the terminal of the grounding connector is pressed into contact with a metal part of the vehicle body which is exposed by removing the paint of the vehicle body. The vehicle-mounted film antenna according to claim 10, wherein the film antenna is grounded. 13. A grounding connector for connecting a terminal to an outer conductor of the power supply coaxial cable is attached to the power supply coaxial cable, and a conductor sheet is pasted on a vehicle body paint, and the grounding connector is attached to the conductor sheet. The vehicle-mounted film antenna according to claim 10, wherein the terminals of the connector are press-contacted and grounded. 14. The antenna conductor according to claim 1, wherein the antenna conductor is formed by printing a conductive paste.
14. The on-vehicle film antenna according to any one of 13. 15. The on-vehicle film antenna according to claim 1, wherein the antenna conductor comprises a conductor wire. 16. The in-vehicle film antenna according to claim 1, wherein the window glass is a windshield.