ON-VEHICLE ANTENNA DEVICE

• Main Authors: SONE TAKAYUKI, HAYAKAWA KENJI, ONO SADAO
• Format: Patent
• Language: English; Japanese
• Published: 07.03.2016
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

PROBLEM TO BE SOLVED: To provide an on-vehicle antenna device capable of preventing deterioration of antenna gain by unnecessary resonance between a metal base and a vehicle.SOLUTION: Two conductor plates 90 are fitted to a surface (lower surface) in an opposite side to an arrangement surface (upper surface) of a metal base 60 of a plate-like part 71 of a resin base 70 by eight screws 103. The screw 103 fits the conductor plate 90 on the lower surface of the resin base 70, and fits the metal base 60 on the upper surface of the resin base 70. The metal base 60 and the conductor plate 90 are electrically connected to each other by the screw 103. The conductor plate 90 has four plate spring parts 92 extending so as to be folded obliquely downward from a plate-like part 91 and be closer to a vehicle side. A tip of the plate spring part 92 faces a cylindrical part 62 for power supply, and comes in contact with a vehicle roof (compressed by vehicle roof).SELECTED DRAWING: Figure 4 【課題】金属製ベースと車体との間の不要な共振によるアンテナ利得の低下を防止することの可能な車載用アンテナ装置を提供する。【解決手段】樹脂ベース７０の平板状部７１の、金属製ベース６０の配置面（上面）とは反対側の面（下面）には、２つの導体板９０が８本のネジ１０３により取り付けられる。ネジ１０３は、導体板９０を樹脂ベース７０の下面に取り付けると共に、金属製ベース６０を樹脂ベース７０の上面に取り付ける。ネジ１０３により、金属製ベース６０と導体板９０とが電気的に接続される。導体板９０は、平板状部９１から斜め下方に折り曲げられて車体側に近づくように延びる４つの板バネ部９２を有する。板バネ部９２の先端部は、給電用筒状部６２側に臨み、車体ルーフと接触する（車体ルーフにより圧縮される）。【選択図】図４