WO2009157293A1 - 自動車用窓ガラス - Google Patents

自動車用窓ガラス Download PDF

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Publication number
WO2009157293A1
WO2009157293A1 PCT/JP2009/060372 JP2009060372W WO2009157293A1 WO 2009157293 A1 WO2009157293 A1 WO 2009157293A1 JP 2009060372 W JP2009060372 W JP 2009060372W WO 2009157293 A1 WO2009157293 A1 WO 2009157293A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
heat
window glass
dtv
automobile
Prior art date
Application number
PCT/JP2009/060372
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
浩成 森下
均 柿沢
Original Assignee
日本板硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本板硝子株式会社 filed Critical 日本板硝子株式会社
Priority to EP09770003A priority Critical patent/EP2299538A1/de
Priority to CN2009801232681A priority patent/CN102067379A/zh
Publication of WO2009157293A1 publication Critical patent/WO2009157293A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H01Q1/1278—Supports; Mounting means for mounting on windscreens in association with heating wires or layers

Definitions

  • the present invention relates to an automotive window glass, and more particularly to an automotive window glass provided with an anti-fogging defogger and an antenna.
  • the antenna When the antenna is provided on the rear glass provided with the defogger, the antenna is provided in a narrow space between the defogger and the metal part of the vehicle body roof.
  • an antenna provided there are an AM antenna and an FM antenna (for example, refer to Patent Document 1).
  • DTV terrestrial digital television
  • the AM antenna approaches the DTV antenna and decreases the sensitivity of the DTV antenna. This causes a problem.
  • the sensitivity of the DTV antenna decreases. This is because the directivity in the elevation angle direction of the DTV antenna with respect to the horizontally polarized wave is changed from the horizontal direction to the zenith direction due to the influence of the horizontal antenna element, which is disadvantageous for reception of terrestrial waves and lowering the sensitivity.
  • the AM antenna cannot be provided close to the lower side of the DTV antenna, the installation area of the antenna element cannot be secured, and as a result, the sensitivity of the AM antenna cannot be sufficiently secured. .
  • an object of the present invention is to provide a window glass for automobiles that can provide a highly sensitive DTV antenna even when an AM antenna and FM antenna are installed below the DTV antenna, and that can secure the sensitivity of the AM antenna and FM antenna. There is.
  • the shape of the heat ray pattern of the defogger is a shape having a convex heat ray pattern portion in which the upper center portion is convex when the window glass is attached to an automobile. Both sides of the convex heat ray pattern part are receding, and a non-heat generating area is secured between the DTV antenna and the heat ray pattern part receding downward.
  • the AM antenna has a plurality of first elements facing the convex heat ray pattern portion and parallel to the heat rays forming the convex heat ray pattern portion, and a second element arranged in the non-heat generating region.
  • the pattern of the second element of the AM antenna disposed below the DTV antenna is in a meander shape or a comb shape. Thereby, the influence of the AM antenna on the DTV reception of the horizontally polarized wave can be further reduced.
  • the AM antenna requires an installation area
  • the second element of the AM antenna can be arranged in the non-heat generation region, so that the installation area can be ensured, and the sensitivity of the AM antenna can be ensured.
  • the FM antenna element disposed below the second element of the AM antenna is formed in a pattern along the convex heat ray pattern portion.
  • the feeding terminals of the AM antenna and FM antenna are provided on the side of the rear glass.
  • FIG. 1 is a view showing an embodiment of an automotive window glass according to the present invention.
  • FIG. 2 is a view showing a comparative example of an automobile window glass.
  • FIG. 3 is a view showing another embodiment of the automotive window glass of the present invention.
  • FIG. 4 is a partially enlarged view of the left side portion including the convex hot wire pattern portion of the defogger.
  • FIG. 1 is a view showing an embodiment of an automotive window glass according to the present invention.
  • the automotive window glass 10 of the present embodiment includes a defogger 14 formed on the inner surface of the rear glass 12.
  • the defogger 14 is composed of a plurality of heat wires 18 connected laterally between bus bars 16 a and 16 b provided on both sides of the rear glass 12.
  • These hot-wire patterns are convex hot-wire patterns in which the upper central portion when the automobile window glass 10 is attached to the automobile is raised upward in a convex shape, and both sides receded downward.
  • the convex portion (convex heat ray pattern portion) 30 includes five transverse heat wires 18, and the longitudinal heat wires 20 a to which the five transverse heat wires 18 are connected on both sides of the convex heat ray pattern portion. , 20b are provided.
  • the lower end portions of the vertical heat wires 20a and 20b are connected to the upper end portions of the bus bars 16a and 16b via the horizontal heat wires 22a and 22b, respectively.
  • a non-heat generating region where an antenna can be provided is expanded between the defogger 14 having such a convex heat ray pattern shape and the upper side 24 of the glass adjacent to the metal part of the vehicle body roof.
  • a wide non-heat-generating region extends from the upper side portion 24 of the glass.
  • a DTV antenna, an AM antenna, and an FM antenna, each formed by a conductive wire are disposed.
  • the DTV antenna is formed of U-shaped DTV antenna elements 32a and 32b provided on both sides of the upper portion of the rear glass 12 on the inner surface side of the vehicle and disposed near the upper side 24 of the glass. These DTV antenna elements are arranged in an upper part of a wide non-heat generating area extending on both sides of the convex heat ray pattern part 30. These DTV antenna elements are connected to feeding terminals 34a and 34b, respectively.
  • the FM antenna is provided on both sides along the defogger convex heat ray pattern portion 30 and is composed of L-shaped antenna elements 26a and 26b. These FM antenna elements are connected to feeding terminals 28a and 28b, respectively.
  • the DTV antenna and the FM antenna are arranged symmetrically so that diversity can be configured.
  • the AM antenna is disposed above the defogger 14 and the FM antenna and below the DTV antenna.
  • the AM antenna is a rectangular antenna element (first antenna) arranged above a convex hot wire pattern portion 30 of the defogger 14 and having a plurality of conductive wires arranged in parallel in the horizontal direction.
  • the second elements 38a and 38b meander in a rectangular shape in the vertical and horizontal directions, one end of each being connected to the first element 36, and the other end of the second element 38a connected to the power supply terminal 40.
  • the other end of the second element 38b is open.
  • the second elements 38 a and 38 b of the AM antenna are disposed below the DTV antenna elements 32 a and 32 b and in a non-heat generating region formed on both sides of the convex hot wire pattern portion 30. .
  • the second element located below the DTV antenna elements 32a and 32b meanders, the influence on the sensitivity of the DTV antenna is reduced.
  • the DTV antenna elements 32a and 32b and the second AM antenna are provided.
  • the distance between the elements 38a and 38b can be taken, and the influence on the sensitivity of the second element of the AM antenna to the DTV antenna is further reduced.
  • the meander shape of the second element of the AM antenna is not limited to the rectangular meandering as shown, but may be a sinusoidal meandering. Further, the width of the meandering in the vertical direction does not need to be constant, and can be varied for each meandering.
  • the shape of the second element located below the DTV antenna element is not limited to the meander shape, and may be, for example, a comb shape. Even if the shape is not a meander shape, a predetermined distance can be secured between the AM antenna and the DTV antenna, so that the influence of the sensitivity of the AM antenna on the DTV antenna is reduced.
  • the AM antennas 36, 38a, An automotive window glass provided with 38b and DTV antennas 32a and 32b was produced as a comparative example, and the average sensitivity of the AM antenna and the DTV antenna was measured for Example 1 and the comparative example, respectively.
  • Table 1 shows measured values of average sensitivity of the AM antenna.
  • Table 2 shows the measured values of the average sensitivity of the DTV antenna.
  • FIG. 3 shows another embodiment of the window glass for an automobile in which the shape of the second element of the AM antenna located below the DTV antenna element is a comb shape.
  • the comb-shaped second elements are indicated by 42a and 42b.
  • the second element has a shape in which comb teeth are directed upward. Since other configurations are the same as those of the embodiment of FIG. 1, the same components as those of FIG. 1 are denoted by the same reference numerals.
  • the five horizontal heat wires 18 of the convex hot wire pattern portion are formed at both ends with the hot wires 20a and 22a and the hot wires 20b, 22b.
  • the line width of the horizontal heat wire 18 is 1 mm
  • abnormal heat generation occurs when the wire width of each of the heat wires 20a and 22a and the heat wires 20b and 22b is 8 mm. Therefore, the line width is set to 15.5 mm. In this case, the line width becomes large, so that design is lacking.
  • FIG. 4 is a partially enlarged view of the left portion including the convex hot wire pattern portion 50 of the defogger. Since the defogger is symmetric, only the left part will be described.
  • the five horizontal heat wires 18 constituting the convex hot wire pattern portion 50 are divided into three upper and two lower heat wires, and the upper three horizontal heat wires are vertical heat wires having a large line width.
  • the vertical heat wire 20a is connected to the horizontal heat wire 22a.
  • the lower two horizontal heat wires are connected to a large horizontal heat wire 46a.
  • the horizontal heat wires 22a and 46a having a large line width are connected to the bus bar 16a, respectively.
  • the width of the horizontal heat wire 18 is 1 mm
  • the width of each of the heat wires 20a and 22a that does not generate abnormal heat is 7.7 mm
  • the width of the heat wire 46a that does not generate abnormal heat is 6.5 mm.
  • the line width can be reduced as compared with the case where the five transverse heat wires 18 are connected to one heat wire having a large line width, so that the design is improved.
  • the five transverse heat rays are divided into the upper three and the lower two, but may be divided into the upper two and the lower three. Moreover, what is necessary is just to divide into two upper sides and two lower sides, when the horizontal direction heat rays which comprise a convex-shaped heat ray pattern part are four. Moreover, what is necessary is just to divide into three upper sides and three lower sides, when the horizontal direction heat rays which comprise a convex-shaped heat ray pattern part are six.

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  • Details Of Aerials (AREA)
PCT/JP2009/060372 2008-06-26 2009-06-05 自動車用窓ガラス WO2009157293A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09770003A EP2299538A1 (de) 2008-06-26 2009-06-05 Fensterglas für ein auto
CN2009801232681A CN102067379A (zh) 2008-06-26 2009-06-05 车辆用窗玻璃

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-167102 2008-06-26
JP2008167102A JP5213544B2 (ja) 2008-06-26 2008-06-26 自動車用窓ガラス

Publications (1)

Publication Number Publication Date
WO2009157293A1 true WO2009157293A1 (ja) 2009-12-30

Family

ID=41444362

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/060372 WO2009157293A1 (ja) 2008-06-26 2009-06-05 自動車用窓ガラス

Country Status (4)

Country Link
EP (1) EP2299538A1 (de)
JP (1) JP5213544B2 (de)
CN (1) CN102067379A (de)
WO (1) WO2009157293A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014065383A1 (ja) * 2012-10-25 2014-05-01 旭硝子株式会社 車両用窓ガラスおよびその取付構造
JP2017175290A (ja) * 2016-03-22 2017-09-28 旭硝子株式会社 バックドア、及びガラスアンテナ
JP6847944B2 (ja) * 2016-07-01 2021-03-24 日本板硝子株式会社 車両用窓ガラス
JP6926721B2 (ja) * 2017-06-27 2021-08-25 Ａｇｃ株式会社 ガラスアンテナ及び車両用窓ガラス

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005101809A (ja) * 2003-09-24 2005-04-14 Central Glass Co Ltd 車両用後部窓ガラス
JP2006197184A (ja) * 2005-01-13 2006-07-27 Asahi Glass Co Ltd 車両用ガラスアンテナ
JP2008067300A (ja) * 2006-09-11 2008-03-21 Nippon Sheet Glass Co Ltd 車両用後部窓ガラス

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005101809A (ja) * 2003-09-24 2005-04-14 Central Glass Co Ltd 車両用後部窓ガラス
JP2006197184A (ja) * 2005-01-13 2006-07-27 Asahi Glass Co Ltd 車両用ガラスアンテナ
JP2008067300A (ja) * 2006-09-11 2008-03-21 Nippon Sheet Glass Co Ltd 車両用後部窓ガラス

Also Published As

Publication number Publication date
JP5213544B2 (ja) 2013-06-19
EP2299538A1 (de) 2011-03-23
CN102067379A (zh) 2011-05-18
JP2010011005A (ja) 2010-01-14

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