JP2008287974A

JP2008287974A - Contact device, and glass antenna device

Info

Publication number: JP2008287974A
Application number: JP2007130678A
Authority: JP
Inventors: Yutaka Sumino; 裕角野
Original assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Current assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Priority date: 2007-05-16
Filing date: 2007-05-16
Publication date: 2008-11-27

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact device with cost of components suppressed, through reduction of resistance that causes a resistance loss, with due consideration of skin effect of a contact member. <P>SOLUTION: The contact device 2 is provided with a connecting member 9 made of rod-shaped conductive rubber electrically connected to first equipment 5a fixed, with one end face in contact with a contact 4 formed at second equipment (4) fixed for electrically connecting between the first equipment 5a and the second equipment (4), a fixing member 11 fixed to the first equipment 5a, and a biasing member 10 biasing the connecting member 9 from the fixing member 11 toward the contact 4. The connecting member 9 is so structured to have its outer periphery part with a higher conductivity than its center part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、車両用のガラスアンテナ装置に使用される接点装置、及びこの接点装置を使用するガラスアンテナ装置に関するものである。 The present invention relates to a contact device used in a glass antenna device for a vehicle and a glass antenna device using the contact device.

車両用のガラスアンテナ装置は、車両のリアウィンドウガラス又はフロントウィンドウガラス等の内部又は車室側表面に、埋込み、印刷又は貼付け等により、ラジオ及びテレビジョン等の電波を受信する為の複数のアンテナ素子が形成され、アンテナ素子により受信した信号を、処理回路で増幅等の処理を施してチューナへ送るように構成されている。
ガラスアンテナ装置では、アンテナ素子と処理回路との接続に、ガラスの車室側表面にアンテナ素子の接点を設け、この接点に処理回路側の接触子が当接する接点装置が多用されており、これにより、煩雑な結線作業を不要にし、部品寸法のばらつきにも対応し易いようになっている。 A glass antenna device for a vehicle is a plurality of antennas for receiving radio waves such as radio and television by embedding, printing or pasting the interior of the vehicle rear window glass or front window glass or the vehicle interior side surface. An element is formed, and a signal received by the antenna element is subjected to processing such as amplification by a processing circuit and sent to a tuner.
In the glass antenna device, a contact device in which a contact of the antenna element is provided on the surface of the glass cabin side for connection between the antenna element and the processing circuit, and a contact on the processing circuit side abuts on this contact, is often used. This eliminates the need for complicated wiring work and makes it easy to cope with variations in component dimensions.

特許文献１には、弾性部材によって付勢され被当接体に押付けられ、導電性フィラーを含有する導電性ゴムからなり、被当接体との当接面の端縁に角Ｒ（Ｒ≧０．１ｍｍ）が形成され、ＪＩＳＡ硬度を６０以上９５以下とされた当接部材、及びこの当接部材を備えた接点装置が開示されている。
特許文献２には、弾性部材に付勢されて被当接体に押付けられる導体からなる当接部と、当接部と弾性部材との間に介在する絶縁体と、当接部に接続され導通路の一部となる導線とを備え、弾性部材によらず導線及び当接部を介して被当接体との導通を確保し、寄生キャパシタンスを抑制する高周波回路用接点装置が開示されている。
特開２００５−１６６３０７号公報特開２００５−１６６３１１号公報 In Patent Document 1, an elastic member is pressed against the contacted body and is made of conductive rubber containing a conductive filler. An angle R (R ≧ R ≧) is formed on the edge of the contact surface with the contacted body. 0.1 mm) and a contact member having a JISA hardness of 60 or more and 95 or less, and a contact device provided with the contact member are disclosed.
In Patent Document 2, a contact portion made of a conductor urged by an elastic member and pressed against a contacted body, an insulator interposed between the contact portion and the elastic member, and a contact portion are connected. There is disclosed a high-frequency circuit contact device that includes a conducting wire that is a part of a conduction path, ensures conduction with a contacted body via a conducting wire and a contact portion without depending on an elastic member, and suppresses parasitic capacitance. Yes.
JP 2005-166307 A JP 2005-166111 A

特許文献１，２に開示された接点装置は、車両用ガラスアンテナへ給電する為の接点装置として提案されているが、アンテナの用途、つまり、ラジオ、テレビジョン等の無線高周波信号の導電経路としての課題、即ち、高周波信号が導電部材を通過する際に生じる表皮効果による抵抗値増加の問題が解決されているとは言えない。
ガラスアンテナとアンテナ用給電線との間の電気的接触抵抗は、限り無く小さい方が望ましい。図９は、アンテナ給電線（７５Ω同軸ケーブル）の途中に抵抗Ｒ（Ω）を挿入した場合の通過損失を、シミュレーションにより計算した結果の例を示す特性図である（（ｂ）は（ａ）の０付近の拡大図）。例えば、５Ωの抵抗値が存在すると、損失は、約０．３ｄＢ増加する。損失は、アンテナを通過する信号の減衰をもたらす為、小さい方が望ましく、即ち、線路途中の抵抗は小さい方が望ましい。 The contact device disclosed in Patent Documents 1 and 2 has been proposed as a contact device for supplying power to a glass antenna for a vehicle, but it is used as an antenna, that is, as a conductive path for radio high-frequency signals such as radio and television. That is, it cannot be said that the problem of the increase in resistance value due to the skin effect that occurs when a high-frequency signal passes through the conductive member is not solved.
It is desirable that the electrical contact resistance between the glass antenna and the antenna feed line is as small as possible. FIG. 9 is a characteristic diagram showing an example of a result of calculation by simulation of the passage loss when the resistor R (Ω) is inserted in the middle of the antenna feeding line (75Ω coaxial cable) ((b) is (a)). (Enlarged view around 0). For example, if a resistance value of 5Ω exists, the loss increases by about 0.3 dB. Since the loss causes attenuation of the signal passing through the antenna, it is desirable that the loss is small, that is, it is desirable that the resistance along the line is small.

特許文献１，２に開示された接点装置では、ガラスアンテナのアンテナ素子と給電線との接点部材（当接部材、当接部）として導電ゴムを使用している。導電ゴムは、フィラーと呼称される粉末状の導電材料をゴムと混合したもので、フィラーの粒子同士が接触し、導通することで導電性を得ている。
一般的なフィラー材には、カーボンブラックが用いられることが多い。カーボンブラックは、汎用に用いられている為、材料コストが安価であるが、カーボンブラックをフィラー材とした導電ゴムは、抵抗率が５Ω・ｃｍ程度であり、通常の金属導体（例えば、銅の抵抗率ρ＝１．７２×１０^-6Ω・ｃｍ）と比較して非常に大きい。 In the contact device disclosed in Patent Literatures 1 and 2, conductive rubber is used as a contact member (contact member, contact portion) between the antenna element of the glass antenna and the feeder line. The conductive rubber is obtained by mixing a powdery conductive material called a filler with rubber, and the particles of the filler are brought into contact with each other and become conductive, thereby obtaining conductivity.
Carbon black is often used as a general filler material. Since carbon black is used for general purposes, the material cost is low. However, conductive rubber using carbon black as a filler material has a resistivity of about 5 Ω · cm, and is an ordinary metal conductor (for example, copper Resistivity ρ = 1.72 × 10 ⁻⁶ Ω · cm) is very large.

抵抗率ρ＝５Ω・ｃｍの導体を接点部材として、接点部材の寸法を、断面積Ｓ＝８ｍｍ×６ｍｍ、長さＬ＝３ｍｍとすると、その抵抗値Ｒ_C は、
Ｒ_C ＝ρ・Ｌ／Ｓ＝５×（０．３／（０．８×０．６））
＝３．１（Ω）
であり、図９の特性図の例では、その通過損失の増加分は、約０．２ｄＢとなる。 When a conductor having a resistivity ρ = 5 Ω · cm is used as a contact member and the dimensions of the contact member are a cross-sectional area S = 8 mm × 6 mm and a length L = 3 mm, the resistance value _RC is
R _C = ρ · L / S = 5 × (0.3 / (0.8 × 0.6))
= 3.1 (Ω)
In the example of the characteristic diagram of FIG. 9, the increase in the passage loss is about 0.2 dB.

このような導電ゴム部材での損失増加を防止する為には、導電ゴム部材の抵抗率をより低くすれば良い。例えば、フィラー材として銀の粉末を混合した導電ゴムが入手可能であるが、銀フィラー混合導電ゴムの抵抗率ρは、ρ＝８×１０^-3Ω・ｃｍ程度である。上述したカーボンブラック混合導電ゴムの接点部材と同一寸法とした場合、その抵抗値Ｒ_Agは、
Ｒ_Ag＝ρ・Ｌ／Ｓ＝８×１０^-3（０．３／（０．８×０．６））
＝０．００５（Ω）
であり、図９の特性図の例では、その通過損失の増加分は、略０ｄＢである。 In order to prevent such an increase in loss in the conductive rubber member, the resistivity of the conductive rubber member may be lowered. For example, conductive rubber in which silver powder is mixed as a filler material is available. The resistivity ρ of the silver filler mixed conductive rubber is about ρ = 8 × 10 ⁻³ Ω · cm. When the same dimensions as the contact member of the carbon black mixed conductive rubber described above, the resistance value R _Ag is
R _Ag = ρ · L / S = 8 × 10 ⁻³ (0.3 / (0.8 × 0.6))
= 0.005 (Ω)
In the example of the characteristic diagram of FIG. 9, the increase in the passage loss is approximately 0 dB.

このように、抵抗率が小さい導電ゴム材を用いることで、ガラスアンテナ及びアンテナ給電線間の抵抗を無視できる程度に小さくし、通過損失の増加分を略０ｄＢとすることが、理論的には可能である。
しかし、抵抗率が小さい導電ゴム材を単に用いる方法では、あまり一般的でない銀フィラー等、抵抗率が低いフィラー材を用いた導電ゴムは高価であるという問題がある。また、上記抵抗値の計算式は、直流信号に対する計算式であり、アンテナの用途であるラジオ、テレビジョン等の高周波信号に伴う表皮効果を考慮していないという問題がある。 In this way, by using a conductive rubber material having a low resistivity, the resistance between the glass antenna and the antenna feeder line can be reduced to a negligible level, and the increase in the passage loss can be theoretically 0 dB. Is possible.
However, the method of simply using a conductive rubber material having a low resistivity has a problem that the conductive rubber using a filler material having a low resistivity, such as an uncommon silver filler, is expensive. Moreover, the calculation formula of the resistance value is a calculation formula for a DC signal, and there is a problem that the skin effect associated with a high-frequency signal such as radio or television that is an application of an antenna is not considered.

本発明は、上述したような事情に鑑みてなされたものであり、第１，２発明では、接点部材の表皮効果を考慮した上で、抵抗即ち抵抗損失を小さくし、部品コストを安価に止めることができる接点装置を提供することを目的とする。
第３，４発明では、接点部材の表皮効果を考慮した上で、抵抗即ち抵抗損失を小さくし、部品コストを安価に止めることができる接点装置を使用したガラスアンテナ装置を提供することを目的とする。 The present invention has been made in view of the above-described circumstances. In the first and second inventions, the resistance, that is, the resistance loss is reduced and the component cost is kept low in consideration of the skin effect of the contact member. It is an object of the present invention to provide a contact device that can be used.
In the third and fourth inventions, it is an object to provide a glass antenna device using a contact device that can reduce the resistance, that is, the resistance loss, and can keep the component cost low in consideration of the skin effect of the contact member. To do.

交流電流は、導体断面を均一に分布して流れるのではなく、表皮効果によりその表面付近に集中して流れる。
例えば、図７（ｂ）に示すように、断面が方形の導体を電流が流れる場合、その断面の電流密度は、図７（ａ）に示すように、表面付近が最大となり、導体内部へ向かうに連れて、指数関数的に減少する。 The alternating current does not flow evenly across the conductor cross section, but flows concentrated near the surface due to the skin effect.
For example, as shown in FIG. 7B, when a current flows through a conductor having a square cross section, the current density of the cross section becomes maximum near the surface as shown in FIG. Decreases exponentially with time.

表面の最大電流密度に対し、電流密度が１／ｅに減少する深さδを「表皮深さ」と称し、次式で表される。
δ＝１／（πｆμσ）^1/2 ［ｍ］
ここで、ｆ；交流電流の周波数［Ｈｚ］
μ；材料の透磁率（磁性体でなければ、
μ＝μ₀ ＝４π×１０^-7［Ｈ／ｍ］）
σ；材料の導電率［１／Ω・ｍ］ The depth δ at which the current density decreases to 1 / e with respect to the maximum current density on the surface is referred to as “skin depth” and is expressed by the following equation.
δ = 1 / (πfμσ) ^1/2 [m]
Where f: frequency of alternating current [Hz]
μ; permeability of the material (if not magnetic,
μ = μ ₀ = 4π × 10 ⁻⁷ [H / m])
σ: Conductivity of material [1 / Ω · m]

例えば、銀フィラーを混合した導電ゴムに、ｆ＝１００ＭＨｚ（ＦＭラジオ周波数付近）の交流電流を流すと、その表皮深さδ_Agは、σ_Ag＝１／ρ_Ag＝１００／８×１０^-3＝１２５００［１／Ω・ｍ］を用いて、
δ_Ag＝１／（πｆμσ）^1/2
＝１／（π×１００×１０⁶ ×４π×１０^-7×１２５００）^1/2
＝１／２π（１２５０００）^1/2
＝４．５×１０^-4［ｍ］
＝０．４５［ｍｍ］
となる。 For example, when an alternating current of f = 100 MHz (near FM radio frequency) is passed through a conductive rubber mixed with silver filler, the skin depth δ _Ag is σ _Ag = 1 / ρ _Ag = 100/8 × 10 ⁻³ = 12500 [1 / Ω · m]
δ _Ag = 1 / (πfμσ) ^1/2
= 1 / (π × 100 × 10 ⁶ × 4π × 10 ⁻⁷ × 12500) ^1/2
= 1 / 2π (125000) ^1/2
= 4.5 × 10 ⁻⁴ [m]
= 0.45 [mm]
It becomes.

同様に、カーボンブラックを混合した導電ゴムに、ｆ＝１００ＭＨｚの交流電流を流すと、その表皮深さδ_CBは、σ_CB＝１／ρ_CB＝１００／５＝２０［１／Ω・ｍ］を用いて、
δ_CB＝１／（πｆμσ）^1/2
＝１／（π×１００×１０⁶ ×４π×１０^-7×２０）^1/2
＝１／２π（２００）^1/2
＝０．０１１×１０^-4［ｍ］
＝１１［ｍｍ］
となる。 Similarly, when an alternating current of f = 100 MHz is passed through a conductive rubber mixed with carbon black, the skin depth δ _CB is σ _CB = 1 / ρ _CB = 100/5 = 20 [1 / Ω · m]. Using,
δ _CB = 1 / (πfμσ) ^1/2
= 1 / (π × 100 × 10 ⁶ × 4π × 10 ⁻⁷ × 20) ^1/2
= 1 / 2π (200) ^1/2
= 0.011 × 10 ⁻⁴ [m]
= 11 [mm]
It becomes.

このように、高周波電流で生じる表皮効果を考えると、周波数が高い程、また、材料の導電率が高い程、表皮深さは「浅い」、即ち、電流が材料の表面近傍に集中して流れる。
従って、表皮深さδよりも充分大きな断面積を有する形状の導電材料を通過する交流信号は、断面積全体に分布して流れるのではなく、表面近傍に集中して流れ、断面積の中央部分には殆ど電流が流れないことになる。 Thus, considering the skin effect caused by high-frequency current, the higher the frequency and the higher the electrical conductivity of the material, the shallower the skin depth, that is, the current flows concentrated near the surface of the material. .
Therefore, the AC signal passing through the conductive material having a cross-sectional area sufficiently larger than the skin depth δ does not flow distributed over the entire cross-sectional area, but concentrates near the surface, and the central portion of the cross-sectional area. Almost no current flows through.

これを大まかな近似を行って考え易くする。表皮効果のある導体中では、図８に示すように、電流の流れる方向に直交する断面の、表面から「表皮深さδ」迄の周辺領域のみを均一に電流が流れ、それより内側は、全く流れないとする。
このように簡略化したモデルで考えると、交流電流における抵抗値Ｒ_ACは、電流が流れている周辺部の幅δの部分の断面積Ｓ_d とその材料の低効率ρとで求めることができる。電流方向の導体材料の長さをＬとすると、抵抗値Ｒ_ACは、
Ｒ_AC＝ρＬ／Ｓ_d
である。 This is approximated by making a rough approximation. In the conductor having the skin effect, as shown in FIG. 8, the current flows uniformly only in the peripheral region from the surface to the “skin depth δ” in the cross section orthogonal to the current flow direction, Suppose that it doesn't flow at all.
Considering such a simplified model, the resistance value R _AC in the alternating current can be obtained from the cross-sectional area S _d of the width δ of the peripheral portion where the current flows and the low efficiency ρ of the material. . When the length of the conductor material in the current direction is L, the resistance value R _AC is
R _AC = ρL / S _d
It is.

一方、この導体材料の直流電流に対する抵抗値Ｒ_DCは、導体材料の電流方向と直交する全断面積Ｓ_DCを用いて、
Ｒ_DC＝ρＬ／Ｓ_DC
である。
交流時及び直流時の抵抗比を考えると、
Ｒ_AC／Ｒ_DC＝（ρＬ／Ｓ_d ）／（ρＬ／Ｓ_DC）＝Ｓ_DC／Ｓ_d
となり、電流が流れる部分の面積比に逆比例することが判る。 On the other hand, the resistance value R _{DC with} respect to the direct current of this conductor material is obtained by using the total cross-sectional area S _DC orthogonal to the current direction of the conductor material,
R _DC = ρL / S _DC
It is.
Considering the resistance ratio during alternating current and direct current,
R _AC / R _DC = (ρL / S _d ) / (ρL / S _DC ) = S _DC / S _d
Thus, it can be seen that it is inversely proportional to the area ratio of the portion through which the current flows.

具体例として、上述した導体材料の寸法、断面積Ｓ＝８ｍｍ×６ｍｍ、長さＬ＝３ｍｍで、銀フィラーを混合した導電ゴムを用いた場合、１００ＭＨｚの交流信号時及び直流信号時の抵抗比を計算すると、その表皮深さδ_Agは、上述した計算により、δ_Ag＝０．４５［ｍｍ］であり、
全断面積Ｓ_DCは、Ｓ_DC＝８×６＝４８［ｍｍ² ］
交流信号時に電流が流れている周辺部の幅δ_Agの部分の断面積Ｓ_ACは、
Ｓ_AC＝Ｓ_DC−（８−０．４５×２）×（６−０．４５×２）
＝１２．５［ｍｍ² ］
である。
故に、Ｒ_AC／Ｒ_DC＝Ｓ_DC／Ｓ_AC＝４８／１２．５＝３．８
となる。 As a specific example, when using conductive rubber mixed with silver filler with dimensions of the above-described conductor material, cross-sectional area S = 8 mm × 6 mm, length L = 3 mm, resistance ratio at the time of 100 MHz AC signal and DC signal , The skin depth δ _Ag is δ _Ag = 0.45 [mm] according to the calculation described above.
The total cross-sectional area S _DC is S _DC = 8 × 6 = 48 [mm ² ]
The cross-sectional area S _AC of the portion of the width δ _Ag of the peripheral portion where current flows at the time of the AC signal is
S _AC = S _DC − (8−0.45 × 2) × (6−0.45 × 2)
= 12.5 [mm ² ]
It is.
Therefore, R _AC / R _DC = S _DC / S _AC = 48 / 12.5 = 3.8
It becomes.

即ち、このモデルの例では、銀フィラー混合導電ゴムは、上述した計算による直流信号
時の抵抗値Ｒ_Ag＝０．００５Ωに対し、１００ＭＨｚの信号が流れる場合には、その３．８倍（約０．０１９Ω）の抵抗として作用していることになる。このとき、図９から、導電ゴム部分の抵抗により生じる通過損失は、充分小さく、この寸法の銀フィラー混合導電ゴムを１００ＭＨｚの信号に対して用いることは、問題がないことが判る。 That is, in the example of this model, the silver filler mixed conductive rubber is 3.8 times as large as the resistance value R _Ag = 0.005Ω at the time of the DC signal according to the above calculation when the signal of 100 MHz flows. 0.019Ω) as a resistance. At this time, it can be seen from FIG. 9 that the passage loss caused by the resistance of the conductive rubber portion is sufficiently small, and there is no problem in using a silver filler mixed conductive rubber of this size for a signal of 100 MHz.

従って、導電ゴム材として抵抗値は小さいが高価である銀フィラー混合導電ゴムは、ガラスアンテナへの給電線接続部の押当て構造部材として好適であるが、交流信号を流す用途から考えると、材料断面の中央部分には信号は流れないので、この部分に高価な材料を用いることは無駄である。
そこで、接点装置の押当て構造部材として、図６に示すように、交流信号が流れる外周部に低抵抗の導電ゴム（例えば、銀フィラー混合導電ゴム）を使用し、内部に通常の導電ゴム（カーボンブラック混合ゴム）を使用することにより、抵抗損失が小さく、部品コストを安価に止めることができる接点装置を実現する。 Therefore, the silver filler mixed conductive rubber, which has a small resistance value as a conductive rubber material but is expensive, is suitable as a pressing structure member for the feeder connection portion to the glass antenna. Since no signal flows in the central part of the cross section, it is useless to use an expensive material for this part.
Therefore, as shown in FIG. 6, a low-resistance conductive rubber (for example, a silver filler mixed conductive rubber) is used as the pressing structure member of the contact device on the outer peripheral portion where an AC signal flows, and a normal conductive rubber ( By using a carbon black mixed rubber), a contact device that realizes low resistance loss and can reduce the cost of components can be realized.

第１発明に係る接点装置は、固定された第１機器に電気的に接続され、固定された第２機器に形成された接点に一端面が接触して、前記第１機器及び第２機器間を電気的に接続する導電ゴム製棒形状の接続部材と、前記第１機器に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを備える接点装置において、前記接続部材は、外周部分が、中心部より導電率が高いことを特徴とする。 A contact device according to a first aspect of the present invention is electrically connected to a fixed first device, and one end surface is in contact with a contact formed on the fixed second device, so that the first device and the second device are connected. A contact device comprising: a conductive rubber rod-shaped connection member that electrically connects the two; a fixing member that is fixed to the first device; and a biasing member that biases the connection member from the fixing member to the contact. The connection member is characterized in that the outer peripheral portion has higher conductivity than the central portion.

この接点装置では、導電ゴム製棒形状の接続部材が、固定された第１機器に電気的に接続され、固定された第２機器に形成された接点に一端面が接触して、第１機器及び第２機器間を電気的に接続する。固定部材が第１機器に固定され、付勢部材が接続部材を固定部材から第２機器の接点へ付勢する。接続部材は、外周部分が、中心部より導電率が高くなっている。 In this contact device, the conductive rubber rod-shaped connecting member is electrically connected to the fixed first device, and one end surface is in contact with the contact formed on the fixed second device. And electrically connecting the second devices. The fixing member is fixed to the first device, and the biasing member biases the connection member from the fixing member to the contact point of the second device. The connecting member has a higher conductivity at the outer peripheral portion than at the central portion.

第２発明に係る接点装置は、固定された第１機器に電気的に接続され、固定された第２機器に形成された接点に一部分が接触して、前記第１機器及び第２機器間を電気的に接続する導電ゴム製の接続部材と、前記第１機器に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを備える接点装置において、前記接続部材は、筒形状であり、一端部が前記接点に接触するように構成してあることを特徴とする。 A contact device according to a second aspect of the present invention is electrically connected to a fixed first device, a part of which contacts a contact formed on the fixed second device, and connects between the first device and the second device. In a contact device comprising: a conductive rubber connecting member that is electrically connected; a fixing member that is fixed to the first device; and a biasing member that biases the connecting member from the fixing member to the contact. The connecting member has a cylindrical shape, and is configured so that one end thereof is in contact with the contact point.

この接点装置では、導電ゴム製の接続部材が、固定された第１機器に電気的に接続され、固定された第２機器に形成された接点に一部分が接触して、第１機器及び第２機器間を電気的に接続する。固定部材が第１機器に固定され、付勢部材が接続部材を固定部材から第２機器の接点へ付勢する。接続部材は、筒形状であり、一端部が第２機器に形成された接点に接触している。 In this contact device, the connecting member made of conductive rubber is electrically connected to the fixed first device, and a part of the contact member formed on the fixed second device comes into contact with the first device and the second device. Electrically connect between devices. The fixing member is fixed to the first device, and the biasing member biases the connection member from the fixing member to the contact point of the second device. The connecting member has a cylindrical shape, and one end thereof is in contact with a contact formed on the second device.

第３発明に係るガラスアンテナ装置は、車両の窓ガラスに形成されるアンテナ素子と、該アンテナ素子により受信した信号を処理する為の信号処理回路とを備え、該信号処理回路に電気的に接続され、前記アンテナ素子に形成された接点に一端面が接触して、前記信号処理回路及びアンテナ素子を電気的に接続する導電ゴム製棒形状の接続部材と、前記信号処理回路に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを有する接点装置を備えるガラスアンテナ装置において、前記接続部材は、外周部分が、中心部より導電率が高いことを特徴とする。 A glass antenna device according to a third aspect of the present invention includes an antenna element formed on a window glass of a vehicle and a signal processing circuit for processing a signal received by the antenna element, and is electrically connected to the signal processing circuit. One end face contacts the contact formed on the antenna element, and a conductive rubber rod-shaped connection member for electrically connecting the signal processing circuit and the antenna element, and a fixing fixed to the signal processing circuit In the glass antenna device comprising a contact device having a member and a biasing member that biases the connection member from the fixed member to the contact, the connection member has an outer peripheral portion having higher conductivity than the center portion. Features.

このガラスアンテナ装置では、アンテナ素子が、車両の窓ガラスに形成され、信号処理回路が、アンテナ素子により受信した信号を処理する。接点装置は、導電ゴム製棒形状の接続部材が、信号処理回路に電気的に接続され、アンテナ素子に形成された接点に一端面
が接触して、信号処理回路及びアンテナ素子を電気的に接続し、固定部材が信号処理回路に固定され、付勢部材が接続部材を固定部材からアンテナ素子の接点へ付勢する。接続部材は、外周部分が、中心部より導電率が高くなっている。 In this glass antenna device, an antenna element is formed on a window glass of a vehicle, and a signal processing circuit processes a signal received by the antenna element. In the contact device, a conductive rubber bar-shaped connecting member is electrically connected to the signal processing circuit, and one end surface is in contact with the contact formed on the antenna element, thereby electrically connecting the signal processing circuit and the antenna element. The fixing member is fixed to the signal processing circuit, and the biasing member biases the connection member from the fixing member to the contact of the antenna element. The connecting member has a higher conductivity at the outer peripheral portion than at the central portion.

第４発明に係るガラスアンテナ装置は、車両の窓ガラスに形成されるアンテナ素子と、該アンテナ素子により受信した信号を処理する為の信号処理回路とを備え、該信号処理回路に電気的に接続され、前記アンテナ素子に形成された接点に一部分が接触して、前記信号処理回路及びアンテナ素子を電気的に接続する導電ゴム製の接続部材と、前記信号処理回路に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを有する接点装置を備えるガラスアンテナ装置において、前記接続部材は、筒形状であり、一端部が前記接点に接触するように構成してあることを特徴とする。 A glass antenna device according to a fourth aspect of the present invention comprises an antenna element formed on a window glass of a vehicle and a signal processing circuit for processing a signal received by the antenna element, and is electrically connected to the signal processing circuit. A contact member made of a conductive rubber for electrically connecting the contact point formed on the antenna element and electrically connecting the signal processing circuit and the antenna element; and a fixing member fixed to the signal processing circuit; In a glass antenna device comprising a contact device having a biasing member that biases the connection member from the fixed member to the contact, the connection member has a cylindrical shape, and one end is configured to contact the contact It is characterized by being.

このガラスアンテナ装置では、アンテナ素子が、車両の窓ガラスに形成され、信号処理回路が、アンテナ素子により受信した信号を処理する。接点装置は、導電ゴム製の接続部材が、信号処理回路に電気的に接続され、アンテナ素子に形成された接点に一部分が接触して、信号処理回路及びアンテナ素子を電気的に接続し、固定部材が信号処理回路に固定され、付勢部材が接続部材を固定部材からアンテナ素子の接点へ付勢する。接続部材は、筒形状であり、一端部がアンテナ素子の接点に接触している。 In this glass antenna device, an antenna element is formed on a window glass of a vehicle, and a signal processing circuit processes a signal received by the antenna element. In the contact device, a conductive rubber connecting member is electrically connected to the signal processing circuit, a part of the contact is formed on the antenna element, and the signal processing circuit and the antenna element are electrically connected and fixed. The member is fixed to the signal processing circuit, and the biasing member biases the connection member from the fixing member to the contact of the antenna element. The connecting member has a cylindrical shape, and one end is in contact with the contact of the antenna element.

第１，２発明に係る接点装置によれば、接点部材の表皮効果を考慮した上で、抵抗即ち抵抗損失を小さくし、部品コストを安価に止めることができる接点装置を実現することができる。 According to the contact device according to the first and second inventions, it is possible to realize a contact device that can reduce resistance, that is, resistance loss, and can keep the component cost low, in consideration of the skin effect of the contact member.

第３，４発明に係るガラスアンテナ装置によれば、接点部材の表皮効果を考慮した上で、抵抗即ち抵抗損失を小さくし、部品コストを安価に止めることができる接点装置を使用したガラスアンテナ装置を実現することができる。 According to the glass antenna device according to the third and fourth inventions, the glass antenna device using the contact device which can reduce the resistance, that is, the resistance loss, and can keep the component cost low in consideration of the skin effect of the contact member. Can be realized.

以下に、本発明をその実施の形態を示す図面に基づき説明する。
（実施の形態）
図１は、本発明に係るガラスアンテナ装置及び接点装置の実施の形態の要部構成を示す説明図である。
このガラスアンテナ装置は、略同形状で対向配置されてダイバシティを構成する２つのアンテナ１，７を備えている。各アンテナ１，７は、例えば、車両のリアウィンドウガラス６の合わせガラスに、Ｌ字型の４本のアンテナ素子３が挟持され、各アンテナ素子３の一方の端部には、リアウィンドウガラス６と車両のルーフパネル８とが重なった領域Ａで、車室側に各接点４が露出形成されている。各接点４は、車幅方向に略等間隔に形成されている。 Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof.
(Embodiment)
FIG. 1 is an explanatory diagram showing the main configuration of an embodiment of a glass antenna device and a contact device according to the present invention.
This glass antenna device is provided with two antennas 1 and 7 which are arranged substantially opposite to each other and constitute diversity. Each of the antennas 1 and 7 includes, for example, four L-shaped antenna elements 3 sandwiched between laminated glasses of a rear window glass 6 of a vehicle, and the rear window glass 6 is disposed at one end of each antenna element 3. In the region A where the vehicle roof panel 8 overlaps, the respective contacts 4 are exposed on the vehicle compartment side. Each contact 4 is formed at substantially equal intervals in the vehicle width direction.

ルーフパネル８には、アンテナ素子３で受信した信号を処理する為のアンプ等の処理回路を支持するベース基板５がボルト等で固定されている。ベース基板５及び各接点４間には、接点装置２が挿設されている。尚、領域Ａは、図示しないカバー又は着色ガラス等により、ベース基板５及び接点４等が見えないようにされている。 A base substrate 5 that supports a processing circuit such as an amplifier for processing a signal received by the antenna element 3 is fixed to the roof panel 8 with a bolt or the like. A contact device 2 is inserted between the base substrate 5 and each contact 4. In the area A, the base substrate 5 and the contacts 4 are hidden from view by a cover or colored glass (not shown).

図２は、図１に示す接点装置２の要部構成例を示す断面図である。
接点装置２は、ベース基板５（図１）に固定され、断面が方形の有底筒形状の固定部材１１と、固定部材１１の一方の底部に開口された孔から突出して、接点４（図１）に当接し、断面が方形の導電ゴム製棒形状の接続部材９と、固定部材１１内で内底から接続部材９を接点４方向へ付勢する金属導体からなるスプリング（付勢部材）１０とを備えている
。 FIG. 2 is a cross-sectional view showing a configuration example of a main part of the contact device 2 shown in FIG.
The contact device 2 is fixed to the base substrate 5 (FIG. 1), protrudes from a fixing member 11 having a bottomed cylindrical shape having a square cross section, and a hole opened in one bottom portion of the fixing member 11, and contacts 4 (FIG. 1) Contact member 9 made of a conductive rubber bar having a square cross section and a metal conductor for urging the connection member 9 from the inner bottom toward the contact 4 in the fixing member 11 (biasing member) 10.

接続部材９は、断面の寸法が固定部材１１の内のりより僅かに小さい基部１４をスプリング１０側に有しており、接続部材９が固定部材１１の孔の縁に接触し、基部１４が固定部材１１の内壁に接触することにより、接続部材９が接点４に当接する角度が保持される。
固定部材１１は、他方の底部に突設されたピンが、ベース基板５（図１）を貫通してベース基板５の導体パターン５ａに半田付けされて固定され、スプリング１０は、固定部材１１内でこのピンに導通している。これにより、接点４、接続部材９、スプリング１０、固定部材１１のピン、導体パターン５ａの経路の導通状態が保持される。 The connecting member 9 has a base portion 14 on the spring 10 side whose cross-sectional dimension is slightly smaller than the inner diameter of the fixing member 11, the connecting member 9 contacts the edge of the hole of the fixing member 11, and the base portion 14 is the fixing member. The angle at which the connecting member 9 contacts the contact 4 is maintained by contacting the inner wall 11.
The fixing member 11 is fixed by a pin protruding from the other bottom portion passing through the base substrate 5 (FIG. 1) and soldered to the conductor pattern 5 a of the base substrate 5. Is connected to this pin. Thereby, the conduction | electrical_connection state of the path | route of the contact 4, the connection member 9, the spring 10, the pin of the fixing member 11, and the conductor pattern 5a is maintained.

図３は、接続部材９の構成例を示す斜視図である。
接続部材９は、上述したように、断面が方形の導電ゴム製棒形状であるが、基部１４を含めてその外周部１３に、銀フィラー混合導電ゴムを使用し、内部１２にカーボンブラック混合ゴムを使用している。
これにより、接続部材９は、交流信号が流れる外周部１３の導電率が、交流信号が流れない内部１２の導電率より高くなり、接続部材９全体として、従来のカーボンブラック混合ゴム製の接続部材より、抵抗損失を小さくすることができる。 FIG. 3 is a perspective view illustrating a configuration example of the connection member 9.
As described above, the connecting member 9 is in the shape of a bar made of conductive rubber having a square cross section, and silver filler mixed conductive rubber is used for the outer peripheral portion 13 including the base portion 14, and carbon black mixed rubber is used for the inner portion 12. Is used.
Thereby, the electrical conductivity of the outer peripheral part 13 through which an alternating current signal flows becomes higher than the electrical conductivity of the internal part 12 where an alternating current signal does not flow, and the connecting member 9 as a whole is a connecting member made of a conventional carbon black mixed rubber. Thus, the resistance loss can be reduced.

このガラスアンテナ装置は、アンテナ１，７の各アンテナ素子３が、ラジオ及びテレビジョン等の電波を受信し、受信した高周波信号は、アンテナ素子３の接点４、接続部材９、スプリング１０、固定部材１１のピン、導体パターン５ａの経路で、ベース基板５のアンプ等の処理回路へ伝送される。高周波信号が接続部材９を流れる際は、その殆どが外周部１３の銀フィラー混合導電ゴムを流れる。処理回路で処理された高周波信号は、車両内の図示しないチューナへ伝送される。 In this glass antenna device, the antenna elements 3 of the antennas 1 and 7 receive radio waves such as radio and television, and the received high frequency signals are the contact 4 of the antenna element 3, the connecting member 9, the spring 10, and the fixing member. The signal is transmitted to a processing circuit such as an amplifier of the base substrate 5 through a path of 11 pins and the conductor pattern 5a. When the high-frequency signal flows through the connecting member 9, most of the high-frequency signal flows through the silver filler mixed conductive rubber in the outer peripheral portion 13. The high frequency signal processed by the processing circuit is transmitted to a tuner (not shown) in the vehicle.

尚、接続部材９に代えて、図４に示すような接続部材９ａを使用しても同様の効果を得ることが可能である。接続部材９ａは、接続部材９同様、断面が方形の導電ゴム製棒形状であり、基部１４を含めてその外周部１３ａに、銀フィラー混合導電ゴムを使用しているが、内部１２ａを空洞に形成している。
これにより、接続部材９ａは、交流信号が流れる外周部１３ａの導電率が、外周部をカーボンブラック混合ゴム製とする場合より高くなり、接続部材９ａ全体として、従来のカーボンブラック混合ゴム製の接続部材より、抵抗損失を小さくすることができる。 Note that the same effect can be obtained by using a connecting member 9a as shown in FIG. 4 in place of the connecting member 9. Like the connection member 9, the connection member 9a is in the shape of a bar made of conductive rubber having a square cross section, and silver filler mixed conductive rubber is used for the outer peripheral portion 13a including the base portion 14, but the inside 12a is hollow. Forming.
As a result, in the connection member 9a, the conductivity of the outer peripheral portion 13a through which the AC signal flows is higher than that in the case where the outer peripheral portion is made of carbon black mixed rubber. Resistance loss can be made smaller than that of the member.

また、接続部材９に代えて、図５に示すような接続部材９ｂを使用しても同様の効果を得ることが可能である。接続部材９ｂは、断面が方形の銀フィラー混合導電ゴム製棒形状であり、高周波信号が流れる表皮深さ程度の太さである。基部１４においても、外周部は銀フィラー混合導電ゴムを使用し、内部にはカーボンブラック混合ゴムを使用する。
固定部材１１の一方の底部の孔は、接続部材９ｂの断面より僅かに大きく、接続部材９ｂが固定部材１１の孔の縁に接触し、基部１４が固定部材１１の内壁に接触することにより、接続部材９ｂが接点４に当接する角度が保持される。
尚、固定部材１１及び接続部材９，９ａ，９ｂの断面は、方形に限定されることはなく、円形、楕円形、多角形等であっても良い。 Further, even if a connecting member 9b as shown in FIG. 5 is used in place of the connecting member 9, the same effect can be obtained. The connecting member 9b is a silver filler mixed conductive rubber bar shape having a square cross section, and has a thickness of about the skin depth through which a high-frequency signal flows. Also in the base portion 14, silver filler mixed conductive rubber is used for the outer peripheral portion, and carbon black mixed rubber is used for the inside.
The hole at one bottom of the fixing member 11 is slightly larger than the cross section of the connecting member 9b, the connecting member 9b contacts the edge of the hole of the fixing member 11, and the base 14 contacts the inner wall of the fixing member 11. The angle at which the connecting member 9b contacts the contact 4 is maintained.
The cross sections of the fixing member 11 and the connecting members 9, 9a, 9b are not limited to a square, and may be a circle, an ellipse, a polygon, or the like.

本発明に係るガラスアンテナ装置及び接点装置の実施の形態の要部構成を示す説明図である。It is explanatory drawing which shows the principal part structure of embodiment of the glass antenna device and contact device which concern on this invention. 図１に示す接点装置の要部構成例を示す断面図である。It is sectional drawing which shows the principal part structural example of the contact apparatus shown in FIG. 接続部材の構成例を示す斜視図である。It is a perspective view which shows the structural example of a connection member. 接続部材の他の構成例を示す斜視図である。It is a perspective view which shows the other structural example of a connection member. 接続部材の他の構成例を示す斜視図である。It is a perspective view which shows the other structural example of a connection member. 本発明に係る接点装置の接続部材を説明する為の説明図である。It is explanatory drawing for demonstrating the connection member of the contact apparatus which concerns on this invention. 従来の接点装置の接続部材を説明する為の説明図である。It is explanatory drawing for demonstrating the connection member of the conventional contact apparatus. 本発明に係る接点装置の接続部材を説明する為の説明図である。It is explanatory drawing for demonstrating the connection member of the contact apparatus which concerns on this invention. アンテナ給電線の途中に抵抗を挿入した場合の通過損失を、シミュレーションにより計算した結果の例を示す特性図である。It is a characteristic view which shows the example of the result of having calculated the passage loss at the time of inserting resistance in the middle of an antenna feed line by simulation.

符号の説明Explanation of symbols

１，７アンテナ
２接点装置
３アンテナ素子
４接点
５ベース基板
５ａ導体パターン
６リアウィンドウガラス
８ルーフパネル
９，９ａ，９ｂ接続部材
１０スプリング（付勢部材）
１１固定部材
１２，１２ａ内部
１３，１３ａ外周部
１４基部 DESCRIPTION OF SYMBOLS 1,7 Antenna 2 Contact apparatus 3 Antenna element 4 Contact 5 Base board 5a Conductor pattern 6 Rear window glass 8 Roof panel 9, 9a, 9b Connection member 10 Spring (biasing member)
11 Fixing member 12, 12a Inside 13, 13a Outer peripheral part 14 Base

Claims

固定された第１機器に電気的に接続され、固定された第２機器に形成された接点に一端面が接触して、前記第１機器及び第２機器間を電気的に接続する導電ゴム製棒形状の接続部材と、前記第１機器に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを備える接点装置において、
前記接続部材は、外周部分が、中心部より導電率が高いことを特徴とする接点装置。 The conductive rubber is electrically connected to the fixed first device and has one end surface in contact with the contact formed on the fixed second device to electrically connect the first device and the second device. In a contact device comprising: a rod-shaped connection member; a fixing member fixed to the first device; and a biasing member that biases the connection member from the fixing member to the contact.
The contact member is characterized in that the outer peripheral portion of the connecting member has higher conductivity than the central portion.

固定された第１機器に電気的に接続され、固定された第２機器に形成された接点に一部分が接触して、前記第１機器及び第２機器間を電気的に接続する導電ゴム製の接続部材と、前記第１機器に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを備える接点装置において、
前記接続部材は、筒形状であり、一端部が前記接点に接触するように構成してあることを特徴とする接点装置。 A part made of conductive rubber is electrically connected to the fixed first device and partly contacts a contact formed on the fixed second device to electrically connect the first device and the second device. In a contact device comprising: a connection member; a fixing member fixed to the first device; and a biasing member that biases the connection member from the fixing member to the contact.
The contact member has a cylindrical shape, and is configured such that one end thereof is in contact with the contact.

車両の窓ガラスに形成されるアンテナ素子と、該アンテナ素子により受信した信号を処理する為の信号処理回路とを備え、該信号処理回路に電気的に接続され、前記アンテナ素子に形成された接点に一端面が接触して、前記信号処理回路及びアンテナ素子を電気的に接続する導電ゴム製棒形状の接続部材と、前記信号処理回路に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを有する接点装置を備えるガラスアンテナ装置において、
前記接続部材は、外周部分が、中心部より導電率が高いことを特徴とするガラスアンテナ装置。 An antenna element formed on a window glass of a vehicle and a signal processing circuit for processing a signal received by the antenna element, electrically connected to the signal processing circuit, and a contact formed on the antenna element One end face is in contact with a conductive rubber rod-shaped connection member that electrically connects the signal processing circuit and the antenna element, a fixing member that is fixed to the signal processing circuit, and the connection member that is the fixing member. In a glass antenna device comprising a contact device having a biasing member that biases the contact to the contact point,
The glass antenna device according to claim 1, wherein the connecting member has an outer peripheral portion having a higher conductivity than a central portion.

車両の窓ガラスに形成されるアンテナ素子と、該アンテナ素子により受信した信号を処理する為の信号処理回路とを備え、該信号処理回路に電気的に接続され、前記アンテナ素子に形成された接点に一部分が接触して、前記信号処理回路及びアンテナ素子を電気的に接続する導電ゴム製の接続部材と、前記信号処理回路に固定される固定部材と、前記接続部材を該固定部材から前記接点へ付勢する付勢部材とを有する接点装置を備えるガラスアンテナ装置において、
前記接続部材は、筒形状であり、一端部が前記接点に接触するように構成してあることを特徴とするガラスアンテナ装置。 An antenna element formed on a window glass of a vehicle and a signal processing circuit for processing a signal received by the antenna element, electrically connected to the signal processing circuit, and a contact formed on the antenna element A conductive rubber connecting member electrically connecting the signal processing circuit and the antenna element, a fixing member fixed to the signal processing circuit, and the connecting member from the fixing member to the contact point In a glass antenna device comprising a contact device having a biasing member biasing to
The glass antenna device according to claim 1, wherein the connection member has a cylindrical shape, and one end thereof is in contact with the contact.