JP4682029B2 - Amplifying equipment installation structure - Google Patents

Description

  The present invention relates to a structure for installing an amplifying apparatus connected to an antenna formed on the surface of an automotive glass in an automobile.

  Conventionally, a film antenna attached to the surface of glass for automobiles is known (for example, refer to Patent Document 1). This film antenna is connected via a coaxial cable to a selector unit for selecting a signal to be transmitted to a receiver attached to an automobile. The selector unit is provided with an amplification amplifier.

Also known is a film antenna device in which a terminal portion at the end of a cable can be arbitrarily attached to and detached from a film antenna (for example, see Patent Document 2). The film antenna device includes a holder portion fixed to the film antenna, and a pickup portion that is detachably attached to the holder portion and incorporates a terminal portion at the end of the cable. A low noise amplifier is incorporated in the pickup unit as necessary. When a small amplifier is installed on the glass surface, it is difficult to stabilize the ground because it is desired to reduce the ground or the electrode for grounding in consideration of the beauty on the glass surface. Yes, it is difficult to stabilize the performance of the antenna.
JP 2005-137024 A JP 2005-110200 A

  In the above-described film antenna, the braided wire of the coaxial cable is attached to the pillar portion of the vehicle body with a conductive adhesive tape, and a capacitor is formed between the metal portion of the pillar portion and the conductive adhesive tape. Is grounded. This is preferable in that the grounding work is reduced while securing the antenna performance. However, unlike this, if sufficient ground is not obtained, not only grounding but also the installation position of the amplifying device connected to the antenna and the routing of the wiring connecting the antenna and the amplifying device, etc. The antenna performance is greatly affected.

  Then, an object of this invention is to provide the installation structure of the amplifier which can stabilize the performance of the antenna formed in the surface of the glass for motor vehicles.

  In order to solve the above problems, an amplification device installation structure according to an aspect of the present invention is an amplification device installation structure connected to an antenna element formed on a surface of an automotive glass, and the amplification device is an automobile. It is fixed to the body flange that holds the outer periphery of the glass.

  According to this aspect, the amplifying device is fixed to the body flange held by the outer peripheral portion of the automotive glass. For this reason, the amplifying device can be installed close to the antenna element formed on the glass for an automobile. If it does so, the wiring which connects an antenna element and an amplifier can be shortened. Therefore, the performance of the antenna formed on the surface of the glass for automobiles can be stabilized.

  In this case, the amplifying device may include an earth connection portion that is grounded to the body flange. In this way, since the ground of the amplification device can be taken by the body flange, the ground of the amplification device can be stabilized. Therefore, the performance of the antenna formed on the surface of the glass for automobiles can be further stabilized.

  The amplifying device may include an earth connection portion that is grounded to the vehicle body near the body flange. In this way, since the ground of the amplifying device can be taken on the vehicle body, the ground of the amplifying device can be stabilized. Therefore, the performance of the antenna formed on the surface of the glass for automobiles can be further stabilized.

  Further, the ground connection portion may be provided on a surface fixed to the body flange of the amplification device. If it does in this way, grounding of an amplification device can be taken to a body flange, fixing an amplification device to a body flange via a fixed surface. Since the means for fixing the amplifying device to the body flange also serves as a ground structure, it is possible to stabilize the ground of the amplifying device and reduce the work load when the amplifying device is attached.

  Further, the amplifying device may include an antenna connection portion provided on a surface different from a surface fixed to the body flange of the amplifying device. Alternatively, the amplifying device includes an antenna connecting portion provided inside the amplifying device, and an antenna element insertion port provided on a surface different from the surface fixed to the body flange, and the antenna element includes the antenna element insertion port. It may be connected to the antenna connection part. In this way, since the signal line from the antenna element can be connected to the amplifying device on a surface different from the surface fixed to the body flange, the antenna element and the amplifying device can be easily connected. This is preferable.

  Alternatively, the amplifying device may include an antenna connecting portion provided on a surface fixed to the body flange of the amplifying device, and an insulating layer may be interposed between the body flange and the antenna element. As described above, when the antenna connection portion is provided on the fixed surface of the amplification device, if an insulating layer is provided between the body flange and the antenna element, the antenna reception signal is attenuated due to a short circuit between the antenna element and the vehicle body. Can be suppressed.

  Further, the amplifying device may be fixed to the body flange by at least one means selected from screwing, adhesion, fixing by an adhesive tape, and fixing by a pressing structure. In this way, the amplifying device and the body flange can be easily fixed.

  In addition, the interior of the amplifying apparatus is further provided in the gap between the body flange and the interior material. It may be arranged. In this way, since the amplifying device is disposed in the gap between the body flange and the interior material and does not enter the field of view of the occupant of the automobile, the aesthetics inside the vehicle when the amplifying device is installed can be Can be maintained in a state.

  ADVANTAGE OF THE INVENTION According to this invention, the performance of the antenna formed in the surface of the glass for motor vehicles can be stabilized.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a main part of an installation structure 10 for an amplification device 16 according to the present embodiment. FIG. 2 is a side view showing a main part of the installation structure 10 of the amplification device 16 according to the present embodiment. 1 and 2, an amplifying device 16 for amplifying a received signal from an antenna element 18 formed on the surface of an automobile glass 12 is fixed to a body flange 14 of an automobile body. The situation is shown. In the following, for easy understanding, as shown in FIGS. 1 and 2, the direction from the amplifying device 16 toward the antenna element 18 is the x-axis direction, and the direction along the outer periphery of the glass 12 for automobiles. An xyz orthogonal coordinate system in which the y-axis direction and the direction perpendicular to the automobile glass 12 are the z-axis direction is appropriately used.

  The glass 12 for automobiles is a windshield glass used as a windshield for automobiles, for example. The automotive glass 12 is fixed to a glass mounting opening provided on the vehicle body. The opening is defined by the body flange 14 of the vehicle body, and the outer peripheral portion of the automotive glass 12 is in close contact with the body flange 14 by urethane 20 as an adhesive applied to one surface of the body flange 14. It is fixed. More specifically, the automotive glass 12 is bonded to the outer side surface of the outer panel 22 with the urethane 20, and the inner panel 24 has the outer peripheral portion on the inner surface of the outer panel 22. It is fixed.

  In the present embodiment, the body flange 14 is configured to include respective peripheral portions of an outer panel 22 that is an outer side of the vehicle body and an inner panel 24 that is an inner side of the vehicle body. The glass surface of the automotive glass 12 and the body flange 14 are fixed substantially in parallel. A black shielding layer is formed on the outer periphery of the glass 12 for automobiles, and the body flange 14 is used for automobiles so that the black shielding layer and the body flange 14 substantially overlap when viewed from the z-axis direction. The glass 12 is held.

  An antenna element 18 is formed on the surface of the automobile glass 12. The antenna element 18 is a film antenna in this embodiment, and has a structure in which, for example, an antenna pattern is printed with a silver paste on a polyester film base, and a protective film is formed on the antenna pattern. The antenna element 18 is not limited to a film antenna, and may be a printed antenna formed by printing and baking a conductive paste on a glass surface by a method such as screen printing, or functions as an antenna. The conductive wire may be directly attached to the glass surface with an adhesive.

  The antenna element 18 includes a U-shaped first antenna element 30 and a rectangular second antenna element 32 as an antenna pattern, a power feeding unit 28, and a leader line 34. Both the first antenna element 30 and the second antenna element 32 extend on the glass 12 for an automobile from the power feeding portion 28. The reception band is, for example, for digital television reception, that is, 470 MHz to 710 MHz. The front ends of the first antenna element 30 and the second antenna element 32 are close to each other with a gap on the automotive glass 12. One end of the lead wire section 34 is connected to the power feeding section 28, and the other end is connected to the antenna connection section 15 of the amplification device 16. In addition, the antenna pattern in this embodiment is an example, Comprising: It is not limited to this. An appropriate antenna pattern can be selected from the viewpoint of reception band, installation space, and the like.

  The amplifying device 16 is bonded and fixed to the surface of the body flange 14 to which the automobile glass 12 is not bonded by an adhesive 40. In other words, the amplifying device 16 is fixed to the inner surface of the inner panel 24 of the body flange 14. Hereinafter, the surface of the amplifying device 16 fixed to the inner panel 24 is appropriately referred to as a fixed surface.

  In this embodiment, the amplifying device 16 has a rectangular parallelepiped shape, for example, and is fixed on the body flange 14 so that each of the six surfaces is orthogonal to any of the x-axis, y-axis, and z-axis. ing. The above-described fixed surface is a surface perpendicular to the z-axis. It is desirable that the size of the amplifying device 16 is determined so that the amplifying device 16 can be installed also in a portion where the width of the body flange 14 is minimized. Since the minimum width of the body flange 14 is, for example, about 10 mm, it is desirable that the width of the amplifying device 16, that is, the dimension in the x-axis direction is, for example, 10 mm or less.

  In consideration of the width of the body flange 14 and the area required for mounting the amplification device 16 on the body flange 14, the length of the amplification device 16, that is, the dimension in the y-axis direction is preferably 20 mm or more. From the viewpoint of reducing the cost for downsizing the amplifying device 16, the length of the amplifying device 16 is preferably 40 mm or less.

  The height of the amplifying device 16, that is, the dimension in the z-axis direction is preferably determined so as not to exceed the height of the rising portion from the body flange 14 to the inner panel 24. Since the height of the rising portion from the body flange 14 to the inner panel 24 is, for example, about 10 mm at the minimum, the height of the amplifying device 16 is desirably 10 mm or less, for example.

  A ground connection portion 17 is provided on a surface perpendicular to the y-axis of the amplifying device 16, and the ground connection portion 17 is electrically connected to the body flange 14 by a conductive adhesive tape 38 such as a copper foil tape. When the surface of the body flange 14 is painted, since the coating film is generally an insulator, an insulating layer is interposed between the metal portion of the body flange 14 and the conductive adhesive tape 38. Become. In such a case, if the capacitance formed between the metal portion of the body flange 14 and the conductive adhesive tape 38 is about 10 pF, a DC signal is blocked, but an AC signal of, for example, 400 MHz or more may pass through. Therefore, it can function as a high-frequency capacitively coupled ground.

  The amplifying device 16 is provided with an antenna connection unit 15. The antenna connection portion 15 is provided on a surface that faces the fixed surface and is perpendicular to the z-axis. The antenna connecting portion 15 of the amplifying device 16 and the power feeding portion 28 of the antenna element 18 are connected by a lead wire 34. The lead wire 34 and the antenna connection portion 15 can be electrically connected by an appropriate method such as soldering, point contact, line contact, surface contact, pressure contact, or capacitive coupling. The lead wire 34 is a flexible conductor, and for example, a lead wire or a flexible substrate may be used, or an antenna wire may be extended.

  The lead wire 34 is fixed to the surface of the automotive glass 12 from the power supply portion 28 to the vicinity of the body flange 14, and rises substantially perpendicularly along the z-axis from the surface of the automotive glass 12 in the vicinity of the body flange 14. It extends. Furthermore, the lead wire 34 is bent toward the antenna connection portion 15 of the amplification device 16 and is connected to the antenna connection portion 15. The routing of the lead wire 34 is determined so that the length of the wiring from the vicinity of the body flange 14 inside the interior material 26 to the antenna connection portion 15 is substantially equal to the shortest length.

  An insulating protective film 36 is interposed between the portion where the lead line 34 extends along the z-axis and the body flange 14 and the amplifying device 16. The insulating protective film 36 cuts off the electrical connection between the body flange 14 and the housing of the amplification device 16 and the lead wire 34. In this way, it is possible to prevent the signal from the antenna element 18 from being attenuated due to a short circuit between the lead wire 34 and the body flange 14 or the like.

  With the above-described configuration, the signal received by the antenna element 18 is input to the amplifying device 16 via the lead line 34. Then, the reception signal amplified by the amplifying device 16 is transmitted to a receiver (not shown) installed in the vehicle. The amplification device 16 and the receiver are connected by, for example, a coaxial cable.

  In the present embodiment, a case where one amplifying device 16 is connected to one antenna pattern is described, but the present invention is not limited to this. The present invention can also be applied to an antenna device having a diversity function. When a plurality of antenna patterns are formed on the glass surface, it is desirable to provide an amplifying device 16 for each antenna pattern. In this way, since each amplifying device 16 can be reduced in size, it becomes easy to store the amplifying device 16 on the body flange 14.

  Further, an interior material 26 is provided so that the body flange 14 and the inner panel 24 are not exposed inside the automobile. The end of the interior material 26 on the side of the automotive glass 12 is fixed to the automotive glass 12 or is held with a slight gap between the end of the interior material 26 and the automotive glass 12. The interior material 26 extends along the inner panel 24 with a predetermined gap between the interior material 26. For this reason, a gap is formed between the interior material 26 and the body flange 14, and the amplification device 16 is disposed in this gap. In this way, the amplifying device 16 is hidden inside the interior material 26 and cannot be seen from inside the vehicle, so that the aesthetics in the vehicle after the amplifying device 16 is installed can be maintained in the same state as before the installation. This is preferable.

  In order to make the amplifying device 16 closer to the antenna element 18 and to shorten the length of the lead wire 34, it is preferable to dispose the amplifying device 16 at the tip of the body flange 14 in the x-axis direction. On the other hand, in order to avoid contact or interference between the amplifying device 16 and the interior material 26, it may be desirable to dispose the amplifying device 16 close to the base portion of the body flange 14.

  As described above, in the present embodiment, the amplifying device 16 is fixed to the body flange 14, so that the lead wire 34 for connecting the antenna element 18 formed on the automobile glass 12 to the amplifying device 16 is shortened. can do. Thereby, the fluctuation of the capacitive coupling between the leader line 34 and the vehicle body due to the fluctuation of the position of the leader line 34 is reduced, and the change in impedance is suppressed, so that the performance of the antenna can be stabilized. Further, since the lead wire 34 is shortened, the degree to which the routing of the lead wire 34 fluctuates due to vibration or impact during use of the antenna after the antenna element 18 and the amplifying device 16 are installed is also reduced. This also contributes to stabilization of the antenna performance. Furthermore, since the amplifying device 16 is grounded to the body flange 14, the ground of the amplifying device 16 is stabilized, which also contributes to the stabilization of the antenna performance.

  Moreover, in this embodiment, since the amplifier 16 is provided for every antenna pattern, the amplifier 16 can be reduced in size. Furthermore, since the reception band is set to a relatively high frequency of 470 MHz to 710 MHz for digital television reception, for example, it is possible to employ a relatively small amplifying device 16 also in this respect. Therefore, it becomes easy to store the amplifying device 16 on the body flange 14.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added to the embodiments based on the knowledge of those skilled in the art, and such modifications have been added. Embodiments may also be included within the scope of the present invention. Here are some examples.

  FIG. 3 is a perspective view showing a main part of a modification of the installation structure 10 of the amplification device 16 according to the present invention. In the following FIG. 3 to FIG. 11, explanation and illustration are omitted as appropriate for the same portions as the above-described embodiment. In the modification shown in FIG. 3, the amplifying device 16 is pressed against the body flange 14 by the presser fitting 42 and fixed. One end of the presser fitting 42 contacts the amplifying device 16 to press the amplifier device 16 against the body flange 14, and the other end of the presser fitting 42 is fixed to the inner panel 24 by a screw 44. The presser fitting 42 is fixed to the inner panel 24 with screws 44 so that a pressing force necessary to fix the amplifying device 16 to the body flange 14 is generated. Even in this case, the amplifying device 16 can be easily fixed to the body flange 14.

  FIG. 4 is a side view showing a main part of another modification of the installation structure 10 of the amplifying device 16 according to the present invention. In the modification shown in FIG. 4, a ground connection plate 46 as an earth connection portion is fixed to the fixed surface of the amplifying device 16. The amplifying device 16 is grounded to the body flange 14 via the ground connection plate 46. The ground connection plate 46 is a metal plate that is wider in at least one direction than the fixed surface of the amplifying device 16, and a portion exposed from the fixed surface is bonded to the body flange 14 by the conductive adhesive tape 38. In this way, since the ground connection of the amplifying device 16 is performed via a fixed surface to which the amplifying device 16 and the body flange 14 are fixed, the ground of the amplifying device can be further stabilized. This is preferable.

  In FIG. 4, the ground connection plates 46 extend on both sides of the amplifying device 16 and are bonded to the body flange 14 on both sides. However, if the amplifying device 16 can be sufficiently fixed to the body flange 14, only one side is provided. May be adhered. The ground connection plate 46 and the body flange 14 may be fixed by an adhesive or a resin tape.

  FIG. 5 is a side view showing a main part of still another modified example of the installation structure 10 of the amplification device 16 according to the present invention. In the modification shown in FIG. 5, a ground connection terminal 47 as an earth connection portion is fixed to the center portion of the fixed surface of the amplification device 16. The amplifying device 16 is grounded to the body flange 14 via the ground connection plate 46. The amplifying device 16 is fixed so that the adhesive 40 is applied around the ground connection terminal 47 and the ground connection terminal 47 is in contact with the body flange 14. Even in this case, the ground connection of the amplifying device 16 can be performed through the fixed surface.

  FIG. 6 is a side view showing a main part of still another modification of the installation structure 10 of the amplifying device 16 according to the present invention. In the modification shown in FIG. 6, the amplification device 16 is bonded to the body flange 14 by applying a conductive adhesive 49 to the fixed surface. Even in this case, the ground connection of the amplifying device 16 can be performed through the fixed surface. Instead of the conductive adhesive 49, a conductive wire adhesive tape may be used.

  FIG. 7 is a side view showing a main part of still another modification of the installation structure 10 of the amplification device 16 according to the present invention. In the modification shown in FIG. 7, a ground connection plate 46 extending from the periphery of the fixed surface of the amplifying device 16 to the same surface is fixed to the body flange 14 by a fixing screw 50. A through hole into which the fixing screw 50 is inserted is formed in the ground connection plate 46, and a through hole into which the fixing screw 50 is screwed is also formed in the body flange 14. The amplifying device 16 is grounded to the body flange 14 via the ground connection plate 46 and the fixing screw 50.

  FIG. 8 is a perspective view showing a main part of still another modification of the installation structure 10 of the amplification device 16 according to the present invention. In the modification shown in FIG. 8, the antenna connection portion 15 is provided on the fixed surface of the amplification device 16. At this time, an insulating protective film 36 is interposed between the lead wire 34 and the body flange 14, and electrical connection between the lead wire 34 and the body flange 14 is cut off. Therefore, attenuation of the signal from the antenna element 18 due to a short circuit between the lead wire 34 and the body flange 14 or the like is suppressed. The antenna connection unit 15 may be provided on a plane perpendicular to the y-axis of the amplification device 16.

  FIG. 9 is a side view showing the main part of yet another modification of the installation structure 10 of the amplifying device 16 according to the present invention. In the modification shown in FIG. 9, the antenna connection unit 15 is provided inside the amplifying device 16. The lead line 34 is connected to the antenna connection unit 15 via an antenna element insertion port 52 formed on a surface perpendicular to the x-axis of the amplification device 16. Even in this case, the antenna element and the amplifying apparatus can be easily connected. Moreover, since the leader line 34 is connected to the amplifying device 16 from a surface closer to the antenna element 18, the leader line 34 can be shortened.

  FIG. 10 is a side view showing a main part of still another modified example of the installation structure 10 of the amplification device 16 according to the present invention. In the modification shown in FIG. 10, the amplifying device 16 is grounded to the vehicle body in the vicinity of the body flange 14 by a conductive adhesive tape 38 such as a copper foil tape. A ground connection portion 17 is provided on the surface of the amplifying device 16 that is perpendicular to the x-axis and that faces the rising portion of the inner panel 24, and the conductive adhesive tape 38 connects the inner panel 24 and the ground connection portion 17. It is pasted so as to be electrically connected. In this way, the ground of the amplifying device 16 can be taken on the vehicle body.

  FIG. 11 is a perspective view showing a main part of still another modified example of the installation structure 10 of the amplification device 16 according to the present invention. In the modification shown in FIG. 11, the ground connection portion 17 and the antenna connection portion 15 are provided on the same surface of the amplifying device 16, and the ground connection portion 17 and the body flange 14 are electrically connected by the conductive adhesive tape 38. It is connected to the. Thus, the amplifying device 16 is installed on the body flange 14. The conductive adhesive tape 38 is attached so as to wrap around the fixed surface from the ground connection portion 17 along the side surface of the amplification device 16. Even in this way, the ground of the amplifying device 16 can be taken by the body flange 14.

It is a perspective view which shows the principal part of the installation structure of the amplifier which concerns on this embodiment. It is a side view which shows the principal part of the installation structure of the amplifier which concerns on this embodiment. It is a perspective view which shows the principal part of the modification of the installation structure of the amplifier which concerns on this invention. It is a side view which shows the principal part of the other modification of the installation structure of the amplifier which concerns on this invention. It is a side view which shows the principal part of the further another modification of the installation structure of the amplifier which concerns on this invention. It is a side view which shows the principal part of the further another modification of the installation structure of the amplifier which concerns on this invention. It is a side view which shows the principal part of the further another modification of the installation structure of the amplifier which concerns on this invention. It is a perspective view which shows the principal part of the further another modification of the installation structure of the amplifier which concerns on this invention. It is a side view which shows the principal part of the further another modification of the installation structure of the amplifier which concerns on this invention. It is a side view which shows the principal part of the further another modification of the installation structure of the amplifier which concerns on this invention. It is a perspective view which shows the principal part of the further another modification of the installation structure of the amplifier which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Installation structure, 12 Glass for motor vehicles, 14 Body flange, 15 Antenna connection part, 16 Amplifier, 17 Ground connection part, 18 Antenna element, 26 Interior material

Claims (9)

An amplifying device installation structure connected to an antenna element formed on the surface of an automotive glass, wherein the amplifying device includes a peripheral portion of an outer panel and a peripheral portion of an inner panel fixed to the inner surface of the outer panel. And is fixed so as to fit within the width of the body flange that holds the outer periphery of the automotive glass,
The fixed surface to the body flange of the amplification device is a vehicle inner surface of the inner panel of the body flange,
Installation structure of an amplification device, wherein an insulating layer is provided between the body flange and pre-Symbol solid Teimen to high frequency capacitive coupling to ground is formed of the amplifying device to the body flange .   The amplifying apparatus installation structure according to claim 1, wherein the amplifying apparatus includes an earth connection portion grounded to the body flange.   The amplification device installation structure according to claim 1, wherein the amplification device includes an earth connection portion that is grounded to a vehicle body near the body flange.   4. The amplification device installation structure according to claim 2, wherein the ground connection portion is provided on a surface fixed to the body flange of the amplification device. 5.   The amplification device installation structure according to any one of claims 1 to 4, wherein the amplification device includes an antenna connection portion provided on a surface different from a surface fixed to the body flange of the amplification device. .   The amplifying device includes an antenna connecting portion provided inside the amplifying device and an antenna element insertion port provided on a surface different from a surface fixed to the body flange, and the antenna element includes the antenna element The amplification device installation structure according to claim 1, wherein the amplification device is connected to the antenna connection portion via an insertion port.   The amplifying device includes an antenna connection portion provided on a surface fixed to the body flange of the amplifying device, and an insulating layer is interposed between the body flange and the antenna element. The installation structure of the amplifying device according to any one of claims 1 to 4.   The amplification device is fixed to the body flange by at least one means selected from screwing, adhesion, fixing by an adhesive tape, and fixing by a pressing structure. The installation structure of the amplifying device described in 1. An interior material further provided with a gap between the body flange and the body flange disposed so as not to be exposed inside the automobile;
The amplifying apparatus installation structure according to claim 1, wherein the amplifying apparatus is disposed in the gap between the body flange and the interior material.

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