JPH0230902B2 - - Google Patents
Info
- Publication number
- JPH0230902B2 JPH0230902B2 JP59195460A JP19546084A JPH0230902B2 JP H0230902 B2 JPH0230902 B2 JP H0230902B2 JP 59195460 A JP59195460 A JP 59195460A JP 19546084 A JP19546084 A JP 19546084A JP H0230902 B2 JPH0230902 B2 JP H0230902B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- steering wheel
- optical transmission
- optical
- light receiving
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/027—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems between relatively movable parts of the vehicle, e.g. between steering wheel and column
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Steering Controls (AREA)
- Optical Communication System (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、車体固定側の発光部から投光した光
を、ステアリングホイールの中央部に配設された
固定パツツド内の光伝送路を介して車体固定側の
受光部へ伝送する車両の光伝送路に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention transmits light emitted from a light emitting unit on the fixed side of the vehicle body through an optical transmission path in a fixed pad disposed in the center of the steering wheel. The present invention relates to a vehicle optical transmission line that transmits light to a light receiving unit fixed to the vehicle body.
（従来の技術）
自動車内の各種電気的負荷を作動・制御するた
めの信号として光信号を利用して、電気的配線接
続箇所を減少させる技術が開発されている。(Prior Art) Technology has been developed to reduce the number of electrical wiring connections by using optical signals as signals for operating and controlling various electrical loads in a vehicle.
ステアリングホイールの中央部に固定されたパ
ツド内に光伝送路・光スイツチ等を備え、一方、
車体固定側に発光部、受光部、制御コンピユータ
等を備えて、発光部−パツド内の光伝送路・光ス
イツチ等−受光部のルートで光伝送路を形成させ
て、光スイツチのオン・オフ操作等を検出するよ
うにしたものは知られている。この場合は、パツ
ド側も車体側も非可動部であるため、送光部に対
向する箇所に光伝送路の一端を設け、受光部に対
向する箇所に光伝送路の他端を設けることができ
る。そして、このような光伝送路を複数組設け
て、種々の電気的負荷を制御することもできる。 The pad fixed to the center of the steering wheel is equipped with optical transmission lines, optical switches, etc.
A light emitting part, a light receiving part, a control computer, etc. are provided on the fixed side of the vehicle body, and an optical transmission path is formed between the light emitting part - the optical transmission line/optical switch in the pad - the light receiving part, and the light switch is turned on and off. Devices that detect operations, etc. are known. In this case, since both the pad side and the car body side are non-movable parts, it is possible to provide one end of the optical transmission path at a location facing the light transmitting section and the other end of the optical transmission path at a location facing the light receiving section. can. It is also possible to provide a plurality of sets of such optical transmission lines to control various electrical loads.
（発明が解決しようとする問題点）
しかし、パツド側と車体側との〓間をステアリ
ングホイールのスポーク部がよぎることになるの
で、光信号の伝達に支障が生ずる。そこで、各ス
ポーク部の所要の箇所に導光体を設け、光信号を
通過させる構成が考えられる。この場合、導光体
によつて光信号は所定の減衰を受ける。このた
め、ステアリングホイールの回動位置によつて、
光伝送路内に介在する導光体の数が変化し、送光
部側および受光部側の双方におのおの導光体が介
在する状態では光信号の減衰量が最大となる。(Problems to be Solved by the Invention) However, since the spokes of the steering wheel cross between the pad side and the vehicle body side, a problem occurs in the transmission of optical signals. Therefore, a configuration may be considered in which a light guide is provided at a required location of each spoke portion to allow the optical signal to pass through. In this case, the optical signal undergoes a predetermined attenuation by the light guide. Therefore, depending on the rotational position of the steering wheel,
The number of light guides interposed in the optical transmission path changes, and the amount of attenuation of the optical signal becomes maximum when each light guide is interposed on both the light transmitting section side and the light receiving section side.
このように、ステアリングホイールの回動によ
つて、光信号路の減衰量は、導光体による減衰を
受けない状態から導光体１箇所分の減衰、および
導光体２箇所分の減衰の３段階にわたつて変化す
る。したがつて、光伝送路の減衰量が大きく変化
しても、安定した信号伝送を可能にするために
は、投光信号の光量を増加させるとか、受光部側
の感度・増幅度を大きくする必要があり、消費電
力の増加となつたり、回路構成が複雑となつたり
して好ましくない。 In this way, as the steering wheel rotates, the amount of attenuation in the optical signal path changes from the state where there is no attenuation by the light guide to the attenuation of one light guide and the attenuation of two light guides. It changes over three stages. Therefore, in order to enable stable signal transmission even if the attenuation of the optical transmission path changes significantly, it is necessary to increase the light intensity of the light emitting signal, or increase the sensitivity and amplification of the light receiving section. However, this is not preferable because it increases power consumption and complicates the circuit configuration.
本発明はこのような課題を解決するためなされ
たもので、その目的はステアリングホイールを回
動させても、光伝送路の減衰量の変化が少ない車
両の光伝送路を提供するものである。 The present invention has been made to solve these problems, and its purpose is to provide an optical transmission path for a vehicle in which the amount of attenuation of the optical transmission path does not change much even when the steering wheel is rotated.
（課題を解決するための手段）
前記課題を解決するため本発明に係る車両の光
伝送路は、スポーク部の各々に導光体を設けると
ともに、各導光体の間隔に対して送光部と受光部
との配設間隔を異なえたことを特徴とする。(Means for Solving the Problems) In order to solve the above-mentioned problems, an optical transmission line for a vehicle according to the present invention includes a light guide provided in each of the spoke parts, and a light transmitting part arranged at intervals between each light guide. It is characterized in that the spacing between the light receiving section and the light receiving section is different.
（作用）
各導光体の間隔と送光・受光部の間隔は異なる
から、ステアリングホイールをいかなる位置へ回
動させても、送光部から受光部までの光伝送路内
に２以上の導光体が介在することはない。したが
つて、光伝送路の光信号減衰量は小さくなり、安
定した光信号の伝送が行なえる。(Function) Since the spacing between each light guide and the spacing between the light transmitting and receiving sections are different, no matter what position the steering wheel is rotated, two or more guides will remain in the optical transmission path from the light transmitting section to the light receiving section. There is no intervening light body. Therefore, the amount of optical signal attenuation in the optical transmission line is reduced, and stable optical signal transmission can be performed.
（実施例）
以下に本発明の好適一実施例を添付図面に基づ
いて説明する。(Embodiment) A preferred embodiment of the present invention will be described below based on the accompanying drawings.
第１図は本発明に係る光伝送路、ステアリング
スイツチ装置の構成を示す概略図、第２図は光伝
送路の配置状態を示す平面図である。 FIG. 1 is a schematic diagram showing the configuration of an optical transmission line and a steering switch device according to the present invention, and FIG. 2 is a plan view showing the arrangement of the optical transmission line.
第１図において、１は車両のステアリングホイ
ールであり、ステアリングホイール１は、ステア
リングシヤフト２の上部に固設されるボス部１ａ
と、周辺に形成されるリング状の把持部１ｂと、
ボス部１ａと把持部１ｂとをつなぐ複数のスポー
ク部１ｃとから形成される。スポーク部１ｃの数
は、本実施例では第２図で示す如く説明の便宜上
２本としている。 In FIG. 1, reference numeral 1 denotes a steering wheel of a vehicle, and the steering wheel 1 has a boss portion 1a fixed to the upper part of a steering shaft 2.
and a ring-shaped gripping portion 1b formed around the periphery.
It is formed from a plurality of spoke parts 1c that connect the boss part 1a and the grip part 1b. In this embodiment, the number of spoke portions 1c is two for convenience of explanation as shown in FIG. 2.
ステアリングホイール１の上側に配設される３
は、実際上ステアリングホイール１の運転者側に
設けられ中央に位置するパツドである。このパツ
ド３は固定式に設けられる。すなわち遊星歯車機
構等を利用してステアリングホイール１が操作に
よつて回転しても、パツド３自体は静止状態に保
持される。そしてパツド３の中には、光信号を案
内する導光路４と導光路４の途中に介設され且つ
導光路４で案内されてきた光を透光又は遮断等す
ることによつて信号を発生する光スイツチ装置５
とが配設される。 3 arranged above the steering wheel 1
is actually a pad located at the center of the steering wheel 1 on the driver's side. This pad 3 is provided in a fixed manner. That is, even if the steering wheel 1 is rotated by operation using a planetary gear mechanism or the like, the pad 3 itself is held stationary. In the pad 3, there is a light guide path 4 that guides the optical signal, and a light guide path 4 is interposed between the light guide paths 4 and generates a signal by transmitting or blocking the light guided by the light guide path 4. Optical switch device 5
and will be provided.
上記導光路４の各端面はパツド３の裏面、すな
わちステアリングホイール１の側の面に臨む如く
配設され、図中４ａは入光面、４ｂは出光面をな
している。 Each end surface of the light guide path 4 is arranged so as to face the back surface of the pad 3, that is, the surface on the side of the steering wheel 1, and in the figure, 4a is a light entrance surface, and 4b is a light exit surface.
一方６は車体固定側の端部を示し、例えばステ
アリングコラムの上端である。車体固定側の端部
６には例えばケース等を設け、その内部には発光
ダイオードの如き発光素子７及びフオトダイオー
ドの如き受光素子８を所定の位置に配設する。こ
れらの発光素子７、受光素子８の配設箇所は、軸
線ａからの距離が、それぞれ発光素子７と前記入
光面４ａとが半径方向について同一位置となり、
受光素子８と前記出光面４ｂとが半径方向につい
て同一位置となるように設定される。上記におい
て発光素子７に対しては電源部（不図示）より所
定の信号を発生させるための駆動電流が供給され
る。駆動電流はパルス的に生じ、発光素子７は点
滅を繰り返す。この光は発光素子７の出射面７ａ
から入光面４ａへ送られる。受光素子８は、その
入射面８ａで出光面４ｂから出射される光信号を
受け、これを電気信号に変換し、車体固定側に配
設される制御コンピユータ（不図示）へ信号を送
る。 On the other hand, reference numeral 6 indicates the end on the side fixed to the vehicle body, for example, the upper end of the steering column. For example, a case or the like is provided at the end 6 on the side fixed to the vehicle body, and a light emitting element 7 such as a light emitting diode and a light receiving element 8 such as a photodiode are arranged at predetermined positions inside the case. The light emitting element 7 and the light receiving element 8 are arranged so that the distance from the axis a is such that the light emitting element 7 and the light input surface 4a are at the same position in the radial direction, respectively.
The light receiving element 8 and the light emitting surface 4b are set to be at the same position in the radial direction. In the above, a drive current for generating a predetermined signal is supplied to the light emitting element 7 from a power supply section (not shown). The drive current is generated in a pulsed manner, and the light emitting element 7 repeatedly blinks. This light is emitted from the emission surface 7a of the light emitting element 7.
from there to the light incident surface 4a. The light-receiving element 8 receives the optical signal emitted from the light-emitting surface 4b at its entrance surface 8a, converts it into an electrical signal, and sends the signal to a control computer (not shown) disposed on the side fixed to the vehicle body.
上記において発光素子７と入光面４ａとで送光
部Ａを構成し、出光面４ｂと受光素子８とで受光
部Ｂを構成する。一対の送光部Ａと受光部Ｂは、
信号の伝送についてループを形成している。 In the above, the light emitting element 7 and the light incident surface 4a constitute the light transmitting section A, and the light emitting surface 4b and the light receiving element 8 constitute the light receiving section B. A pair of light transmitting section A and light receiving section B are
A loop is formed for signal transmission.
前記送光部Ａ、受光部Ｂの各間隙S1には、前述
の如く、ステアリングホイール１のスポーク部１
ｃが位置し、ステアリングホイール１が回転する
とき送光部Ａ、受光部Ｂの各間隙S1をスポーク部
１ｃがよぎることになる。 As described above, each gap S1 between the light transmitting section A and the light receiving section B includes the spoke section 1 of the steering wheel 1.
c is positioned, and when the steering wheel 1 rotates, the spoke portions 1c cross each gap S1 between the light transmitting section A and the light receiving section B.
そこでスポーク部１ｃの送光部Ａ、受光部Ｂの
間隙S1をよぎる部分には導光体９，９を設ける。
導光体９は発光素子７から入光面４ａへの光、出
光面４ｂから受光素子８への光を通過させる作用
を有する。 Therefore, light guides 9, 9 are provided in the portion of the spoke portion 1c that crosses the gap S1 between the light transmitting portion A and the light receiving portion B.
The light guide 9 has the function of passing light from the light emitting element 7 to the light incident surface 4a and light from the light emitting surface 4b to the light receiving element 8.
そして、第２図に示す如く平面上送光部Ａと受
光部Ｂが配置される位置間隔θ1は、スポーク部１
ｃ，１ｃが配置された間隔θ2と異ならせて設定さ
れている。これによつて導光体９，９の間隔はθ1
となり、送光部Ａと受光部Ｂは間隔はθ2であるか
ら導光体９，９のそれぞれが同時に送光部Ａ、受
光部Ｂをよぎることはない。 As shown in FIG.
c and 1c are set to be different from the interval θ 2 at which they are arranged. As a result, the distance between the light guides 9, 9 is θ 1
Since the distance between the light transmitting part A and the light receiving part B is θ 2 , the light guides 9 and 9 do not cross the light transmitting part A and the light receiving part B at the same time.
上記構成によれば、発光素子７→入光面４ａ→
導光路４→出光面４ｂ→受光素子８の光伝送路に
おいて、スポーク部１ｃ，１ｃの導光体９，９が
同時に光伝送路を通過することはなく、例えばい
ずれか一方の導光体が上記光伝送路中の送光部Ａ
に位置するとき、他の受光部Ｂは間隙S1を介して
光の伝送が行われるため、光信号の減衰を最少限
に抑えることができる。このように本発明に係る
光伝送路によれば安定した通信路を確保すること
ができる。 According to the above configuration, light emitting element 7→light entrance surface 4a→
In the optical transmission path from the light guide path 4 to the light output surface 4b to the light receiving element 8, the light guides 9 of the spoke parts 1c, 1c do not pass through the optical transmission path at the same time, and for example, when one of the light guides Light transmitting section A in the above optical transmission line
When the other light-receiving section B is located at , light is transmitted through the gap S1 , so that attenuation of the optical signal can be minimized. As described above, according to the optical transmission line according to the present invention, a stable communication path can be ensured.
上記実施例ではスポーク部の本数、送受光部等
の対数が増した場合にも前記実施例と同様に構成
される。 In the above embodiment, the structure is the same as in the above embodiment even when the number of spoke parts and the number of logarithms of light transmitting/receiving parts, etc. are increased.
（発明の効果）
以上の説明で明らかなように本発明によれば、
ステアリングホイールの各スポーク部にそれぞれ
設けられた導光体の間隔と、車体固定側に設けら
れた送光部・受光部の間隔を異なえたので、送光
部から受光部までの光伝送路内に２以上の導光体
が介在することはない。したがつて、光伝送路の
光信号減衰量の変化は、導光体が介在しない状態
と、導光体が１箇所介在した状態の損失量の変化
だけである。よつて、導光体が２箇所介在する場
合と比較して、光信号の減衰を大幅に改善でき、
受光部側の信号対雑音レベルを向上され、正確で
かつ安定した光信号の伝送を行なうことができ
る。(Effect of the invention) As is clear from the above explanation, according to the present invention,
The spacing between the light guides provided on each spoke of the steering wheel and the spacing between the light transmitting section and the light receiving section provided on the fixed side of the vehicle body were made different, so that the optical transmission path from the light transmitting section to the light receiving section was different. There are no intervening two or more light guides. Therefore, the only change in the amount of optical signal attenuation in the optical transmission line is the change in the amount of loss between the state where no light guide is present and the state where one light guide is present. Therefore, compared to the case where the light guide is interposed at two places, the attenuation of the optical signal can be significantly improved.
The signal-to-noise level on the light receiving section side is improved, and accurate and stable optical signal transmission can be performed.
第１図は本発明に係るステアリングスイツチ装
置、光伝送路の構成を概略的に示す図、第２図は
光伝送路における送光部、受光部の配置関係を示
す平面図である。
図面中、１はステアリングホイール、１ｃはス
ポーク部、２はステアリングシヤフト、３はパツ
ド、４は導光路、５は光スイツチ装置、６は車体
固定側の端部、７は発光素子、８は受光素子、９
は導光体、Ａは送光部、Ｂは受光部である。
FIG. 1 is a diagram schematically showing the configuration of a steering switch device and an optical transmission line according to the present invention, and FIG. 2 is a plan view showing the arrangement of a light transmitting section and a light receiving section in the optical transmission line. In the drawing, 1 is a steering wheel, 1c is a spoke part, 2 is a steering shaft, 3 is a pad, 4 is a light guide, 5 is an optical switch device, 6 is an end on the side fixed to the vehicle body, 7 is a light emitting element, and 8 is a light receiver Motoko, 9
is a light guide, A is a light transmitting part, and B is a light receiving part.
Claims (1)
れたパツド内に導光路および光スイツチ等を設
け、かつ、車体固定側に発光部および受光部を備
えて、発光部から投光した光をパツド内の導光路
を介して受光部へ伝送するよう構成するととも
に、前記パツドと前記発光部・受光部との間を前
記ステアリングホイールのスポーク部がよぎるよ
うに構成された車両の光伝送路において、前記ス
ポーク部の各々に導光体を設けて光を伝送できる
ようにするとともに、各導光体の間隔に対して送
光部と受光部との配設間隔をずらして、送光部か
ら受光部までの光経路内に２以上の導光体が介在
しないよう構成したことを特徴とする車両の光伝
送路。1 A light guide path, a light switch, etc. are provided in a pad fixed to the approximate center of the steering wheel, and a light emitting part and a light receiving part are provided on the side fixed to the vehicle body, so that the light emitted from the light emitting part is guided inside the pad. In the optical transmission path of the vehicle, the spoke part of the steering wheel is configured to transmit information to a light receiving part via an optical path, and the spoke part of the steering wheel is configured to cross between the pad and the light emitting part/light receiving part. A light guide is provided in each of the light guides to enable light transmission, and the spacing between the light transmitter and the light receiver is shifted relative to the interval between the light guides to increase the distance from the light transmitter to the receiver. 1. An optical transmission path for a vehicle, characterized in that the optical path is configured such that two or more light guides are not interposed in the optical path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59195460A JPS6181842A (en) | 1984-09-18 | 1984-09-18 | Vehicle optical transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59195460A JPS6181842A (en) | 1984-09-18 | 1984-09-18 | Vehicle optical transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6181842A JPS6181842A (en) | 1986-04-25 |
| JPH0230902B2 true JPH0230902B2 (en) | 1990-07-10 |
Family
ID=16341439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59195460A Granted JPS6181842A (en) | 1984-09-18 | 1984-09-18 | Vehicle optical transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6181842A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5869144A (en) * | 1981-10-20 | 1983-04-25 | Toyota Motor Corp | Optical transmission device |
-
1984
- 1984-09-18 JP JP59195460A patent/JPS6181842A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6181842A (en) | 1986-04-25 |
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