JPH0373920B2 - - Google Patents
Info
- Publication number
- JPH0373920B2 JPH0373920B2 JP58063959A JP6395983A JPH0373920B2 JP H0373920 B2 JPH0373920 B2 JP H0373920B2 JP 58063959 A JP58063959 A JP 58063959A JP 6395983 A JP6395983 A JP 6395983A JP H0373920 B2 JPH0373920 B2 JP H0373920B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- ring
- light emitting
- wiring board
- emitting elements
- 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
- 230000003287 optical effect Effects 0.000 description 24
- 230000008054 signal transmission Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Steering Controls (AREA)
- Selective Calling Equipment (AREA)
- Optical Communication System (AREA)
Description
【発明の詳細な説明】
この発明は車両内のステアリングハンドル上に
設けられた複数のスイツチよりの入力信号を多重
化し、その信号を光信号に変換した後、車両内の
固定部に送信し、その固定部に設けられた受光素
子により多重信号を受光して更にその受光素子よ
りの多重信号を多重分離するようにした車両用多
重信号伝送装置に関する。DETAILED DESCRIPTION OF THE INVENTION This invention multiplexes input signals from a plurality of switches provided on a steering wheel in a vehicle, converts the signals into optical signals, and then transmits them to a fixed part in the vehicle. The present invention relates to a multiplex signal transmission device for a vehicle, which receives multiplexed signals by a light receiving element provided on a fixed part thereof and further demultiplexes the multiplexed signals from the light receiving element.
<従来技術>
従来のこの種の多重信号伝送装置は第1図及び
第2図に示すようにステアリングハンドル11に
例えば各種表示灯やエアコンデイシヨニング、ラ
ジオセツトなどに対する複数のスイツチ12が設
けられており、この複数のスイツチ12により入
力された信号はエンコーダ13により多重化さ
れ、その多重信号は駆動回路14を通じて発光素
子15を発光する。発光素子15は例えばアクリ
ル樹脂の光導リング16内に設けられており、こ
の発光素子15よりの光は光導リング16内を伝
搬する。第2図に示すように光導リング16の外
周面と近接対向して固定部、即ち車体側に受光素
子17が設けられ、受光素子17で受光された光
導リング16よりの光は伝送路18を通じて増幅
素子19へ供給され、その増幅出力は波形整形回
路21にて波形整形され、更にデコーダ22にて
多重分離され、スイツチ12のそれぞれと対応し
た負荷23の一つ又は複数が制御される。<Prior art> As shown in FIGS. 1 and 2, a conventional multiplex signal transmission device of this type has a steering handle 11 provided with a plurality of switches 12 for various indicator lights, air conditioning, radio settings, etc. The signals input by the plurality of switches 12 are multiplexed by the encoder 13, and the multiplexed signal passes through the drive circuit 14 and causes the light emitting element 15 to emit light. The light emitting element 15 is provided within a light guide ring 16 made of acrylic resin, for example, and light from the light emitting element 15 propagates within the light guide ring 16. As shown in FIG. 2, a light receiving element 17 is provided on a fixed part, that is, on the vehicle body side, close to and facing the outer peripheral surface of the light guide ring 16, and the light from the light guide ring 16 received by the light receiving element 17 is transmitted through a transmission path 18. The amplified output is supplied to the amplification element 19, whose amplified output is waveform-shaped by a waveform shaping circuit 21, and further demultiplexed by a decoder 22, and one or more of the loads 23 corresponding to each of the switches 12 are controlled.
光導リング16はステアリングハンドル11の
操作によつて同時に回動し、その直径は例えば60
ミリ程度の大きさとなつている。従つて発光素子
15が受光素子17の近くにある場合は充分強い
光信号を光導リング16から受けることができる
が、発光素子15と受光素子17とが光導リング
16の軸心に対して約180度離れた場合には受光
素子17に受光させる光信号のレベルがかなり低
下する。つまりこの従来の装置においては光導リ
ング16の全周面にわたつて一様な光信号を出力
することは困難であつた。 The light guide ring 16 is rotated simultaneously by the operation of the steering handle 11, and has a diameter of, for example, 60 mm.
It has a size of about a millimeter. Therefore, if the light emitting element 15 is located near the light receiving element 17, a sufficiently strong optical signal can be received from the light guide ring 16, but the distance between the light emitting element 15 and the light receiving element 17 is approximately 180 degrees with respect to the axis of the light guide ring 16. If they are far apart, the level of the optical signal received by the light receiving element 17 will drop considerably. In other words, in this conventional device, it was difficult to output a uniform optical signal over the entire circumferential surface of the light guide ring 16.
光信号の出力を光導リング16の周面の各部に
おいてほぼ均一にするために光導リング16の内
側に切込みなどを入れることが考えられるが、光
導リング16が複雑な形状となり、更にこの光導
リング16の各部の光のレベルが比較的弱くな
り、光信号をも検知するには増幅器19の感度を
上げる必要があり、このため暗電流の増加や外来
光による影響を受け易く、従つて増幅器19の感
度を上げることは不安定となり易く好ましくな
い。また受光素子17と増幅器19との間のケー
ブル18に外来雑音が誘導するおそれもあつた。 It is conceivable to make cuts or the like inside the light guide ring 16 in order to make the output of the optical signal almost uniform on each part of the circumferential surface of the light guide ring 16, but the light guide ring 16 would have a complicated shape, and the light guide ring 16 would have a complicated shape. The light level in each part of the amplifier 19 becomes relatively weak, and it is necessary to increase the sensitivity of the amplifier 19 in order to detect optical signals. Increasing the sensitivity is not preferable because it tends to become unstable. Additionally, there was a risk that external noise would be induced into the cable 18 between the light receiving element 17 and the amplifier 19.
<発明の概要>
この発明の目的は比較的簡単な構造でステアリ
ングホイールの回動角の位置に拘らずほぼ均一な
光信号を安定に得ることができる車両多重信号伝
送装置を提供することにある。<Summary of the Invention> An object of the present invention is to provide a vehicle multiplex signal transmission device that has a relatively simple structure and can stably obtain a substantially uniform optical signal regardless of the rotational angle position of the steering wheel. .
この発明によればステアリングハンドル上に設
けられた複数のスイツチによつて入力される信号
は多重化され、その多重化信号によつて複数の発
光素子が同時に駆動される。その複数の発光素子
はステアリング軸を中心とした円周上にほぼ等角
間隔で位置して設けられており、各発光素子のチ
ツプが配線基板に直接取付けられ、配線基板はス
テアリング軸(シヤフト)と一体に回転する回転
部に取付けられる。この配線基板から遠ざかるに
従つて各発光素子を中心として漸次開くような反
射面とされそれぞれの各発光素子からの光をその
反射面によつて方向付けて全体として一様な一つ
のリング状光照射面を形成する光リング形成ハウ
ジングが設けられる。この光リング形成ハウジン
グは配線基板側に設けられる。一方前記リング状
光照射面と近接対向して受光素子が車体側の固定
部に設けられる。この受光素子に受光されて電気
信号に変換され、更に多重分離回路で多重分離さ
れ、その出力により各負荷を駆動するようにされ
る。 According to this invention, signals inputted by a plurality of switches provided on a steering wheel are multiplexed, and a plurality of light emitting elements are simultaneously driven by the multiplexed signals. The plurality of light emitting elements are arranged at approximately equal angular intervals on the circumference around the steering shaft, and the chips of each light emitting element are directly attached to the wiring board, and the wiring board is connected to the steering shaft (shaft). It is attached to the rotating part that rotates together with the The reflecting surface gradually opens around each light emitting element as it moves away from the wiring board, and the light from each light emitting element is directed by the reflecting surface to form a uniform ring-shaped light as a whole. A light ring-forming housing is provided that forms an illumination surface. This optical ring forming housing is provided on the wiring board side. On the other hand, a light receiving element is provided on a fixed part on the vehicle body side in close opposition to the ring-shaped light irradiation surface. The light is received by this light-receiving element and converted into an electric signal, which is further demultiplexed by a demultiplexing circuit, and its output drives each load.
<実施例>
電気系統
第3図はこの発明による多重化信号装置におけ
る電気系統を示し、車両のステアリングホイール
上に設けられた複数の操作スイツチ12は、例え
ばラジオ受信機、エアコンデイシヨン機器、その
他各種表示灯などのためのものであり、これらス
イツチ12によつて入力された信号は多重化回路
24によつて多重化される。この多重化回路24
は例えばマイクロプロセツサやゲートアレイで構
成され、この多重化信号出力は駆動回路25を通
じて複数の発光素子D1乃至Doを駆動する。これ
ら発光素子D1乃至Dnは並列に接続され、その一
端は駆動回路25の出力側に、他端は電源端子2
6に接続される。<Embodiment> Electrical system FIG. 3 shows an electrical system in a multiplexed signal device according to the present invention, in which a plurality of operation switches 12 provided on the steering wheel of a vehicle are used for, for example, a radio receiver, air conditioning equipment, etc. These are for various indicator lights, etc., and the signals inputted by these switches 12 are multiplexed by a multiplexing circuit 24. This multiplexing circuit 24
is composed of, for example, a microprocessor or a gate array, and this multiplexed signal output drives a plurality of light emitting elements D1 to D0 through a drive circuit 25. These light emitting elements D1 to Dn are connected in parallel, one end of which is connected to the output side of the drive circuit 25, and the other end connected to the power supply terminal 2.
Connected to 6.
これら発光素子D1……Doより発光した光信号
は受光素子27で受光される。受光素子27は車
体側の固定部に設けられており、受光素子27に
より変換された電気信号は増幅器28で増幅さ
れ、更にこの例においては光変換回路29によつ
て再び光信号に変換されて光フアイバ或はフオト
カプラなどによつて負荷側の光受信回路31に受
信される。この光信号は光受信回路31によつて
電気信号に変換され、その電気信号は多重分離回
路32によつて各スイツチ12と対応した電気信
号に分離され、対応する負荷33に対する駆動が
行われる。 Optical signals emitted from these light emitting elements D 1 . . . D o are received by the light receiving element 27. The light receiving element 27 is provided on a fixed part on the vehicle body side, and the electrical signal converted by the light receiving element 27 is amplified by an amplifier 28, and further converted into an optical signal by an optical conversion circuit 29 in this example. The signal is received by the optical receiving circuit 31 on the load side via an optical fiber or a photocoupler. This optical signal is converted into an electrical signal by the optical receiving circuit 31, and the electrical signal is separated into electrical signals corresponding to each switch 12 by the demultiplexing circuit 32, and the corresponding load 33 is driven.
構 造
第3図中の多重化回路24及び駆動回路25を
含む電子回路部34は第4図に示すようにステア
リングシヤフト35と共に回動するステアリング
ホイル部36上に取付けられ、その電子回路34
上に各操作スイツチ12が取付けられている。こ
のステアリングシヤフト35を中心として発光リ
ング37が配され、第5図に示すように発光リン
グ37には発光素子D1乃至Doが取付けられてお
り、更に警報(ホーン)の電源用スリツプリング
用接点38と、電子回路部34に対する電源用ス
リツプリング用接点39を含む発光リングアツシ
ー41が設けられている。Structure The electronic circuit section 34 including the multiplexing circuit 24 and the drive circuit 25 shown in FIG.
Each operation switch 12 is attached to the top. A light emitting ring 37 is arranged around the steering shaft 35, and as shown in FIG . A light emitting ring assembly 41 is provided which includes a contact 38 and a power supply slip ring contact 39 for the electronic circuit section 34.
車体側の固定部であるステアリングポスト側に
おいて発光リング37と対向する位置にフオトダ
イオード或はフオトトランジスタなどの受光素子
27及び増幅器28を含む受光モジユール部42
(第3図)及び光変換回路29よりなる変換部4
3が発光リングアツシー41と対向して設けられ
る。変換部43はシヤフト35と同軸心的に設け
られているがシヤフト35と接することなく車体
側に固定されている。更にこの変換部43上には
第6図にも示すようにホーン用スリツプリング用
接点38と摺動接触するスリツプリング44が設
けられ、またこれと同軸心的に電子回路用のスリ
ツプリング45が設けられる。即ちこれらスリツ
プリング44,45はスリツプリング用接点3
8,39とそれぞれ摺動接触する。この変換部4
3には光フアイバ伝送用光コネクタ、或はフオト
カプラ駆動信号を含むコネクタ46が接続されて
いる。 A light receiving module section 42 including a light receiving element 27 such as a photodiode or a phototransistor and an amplifier 28 is located at a position facing the light emitting ring 37 on the steering post side, which is a fixed part on the vehicle body side.
(Fig. 3) and a conversion section 4 consisting of an optical conversion circuit 29
3 is provided facing the light emitting ring assembly 41. The conversion portion 43 is provided coaxially with the shaft 35, but is fixed to the vehicle body without contacting the shaft 35. Furthermore, as shown in FIG. 6, a slip ring 44 is provided on this converting portion 43 to make sliding contact with the horn slip ring contact 38, and a slip ring 45 for an electronic circuit is provided coaxially with this slip ring 44. provided. That is, these slip rings 44 and 45 are the slip ring contacts 3.
8 and 39, respectively. This converter 4
3 is connected to an optical connector for optical fiber transmission or a connector 46 containing a photocoupler drive signal.
発光リング
発光リング37は第7図乃至第10図に示すよ
うに板リング状配線基板47と光リング形成ハウ
ジング48とより構成される。配線基板47はそ
の中心を中心として等角間隔に発光素子D1乃至
D4が取付けられており、発光素子D1乃至D8はケ
ースやモールド樹脂などのパツケージが省略さ
れ、発光素子自体を構成するPN接合を有する半
導体、いわゆるチツプがその電極と配線基板47
の上の配線と直接接触して取付けられる。Light-emitting ring The light-emitting ring 37 is composed of a plate ring-shaped wiring board 47 and a light ring forming housing 48, as shown in FIGS. 7 to 10. The wiring board 47 has light emitting elements D 1 to D1 arranged at equal angular intervals around its center.
The light-emitting elements D 1 to D 8 do not require packages such as cases or molded resin, and the semiconductors, so-called chips, having a PN junction that constitute the light-emitting elements themselves are connected to the electrodes and the wiring board 47.
installed in direct contact with the wiring above the
配線基板47に対して、リング状のハウジング
48がその一端面で対接され、他端面はリング状
開口49とされ、この例においてはリング状開口
49は板リング状の導光板51で塞さがれてい
る。この導光板51の外面がリング状光照射面5
2を構成している。 A ring-shaped housing 48 is in contact with the wiring board 47 at one end surface, and the other end surface is a ring-shaped opening 49. In this example, the ring-shaped opening 49 is closed with a plate-ring-shaped light guide plate 51. It's broken. The outer surface of this light guide plate 51 is a ring-shaped light irradiation surface 5.
2.
発光素子D1乃至Doよりの光が光リング形成ハ
ウジング48によつて方向ずけられてほぼ一様な
一つのリング状の光照射面52を形成するように
光リング形成ハウジング48が形成されている。
即ち光リング形成ハウジング48は第8図に示す
ようにそのリングに沿う方向と直角な方向の断面
において、つまりハウジング48の対向内周面4
9a,49bは発光素子Di(i=1,2,……8)
側より照射面52に近ずくに従つて、漸次互に開
くような斜面とされている。この対向内周面は第
9図に示すように互に外側に凸な曲面であつても
よく、つまり第9図の断面においてほぼ半楕円形
の内面の長軸方向の奥に発光素子Diが位置するよ
うにしてもよい。 The light ring forming housing 48 is formed so that the light from the light emitting elements D 1 to D o is directed by the light ring forming housing 48 to form one substantially uniform ring-shaped light irradiation surface 52. ing.
That is, as shown in FIG. 8, the optical ring forming housing 48 is viewed in a cross section perpendicular to the direction along the ring, that is, the opposite inner circumferential surface 4 of the housing 48.
9a and 49b are light emitting elements D i (i=1, 2,...8)
The slopes gradually open to each other as they approach the irradiation surface 52 from the side. These opposing inner circumferential surfaces may be curved surfaces that are convex outward from each other as shown in FIG. 9. In other words, in the cross section of FIG. 9, the light emitting element D i may be located.
更に第10図に示すように光リング形成ハウジ
ング48はそのリングに沿う方向の断面に示すよ
うに、配線基板47側の面は発光素子Diの隣接間
においてリング状光照射面52に漸次近ずくよう
な斜面49c,49dが形成される。つまり第1
0図の断面において半楕円状内面の短軸方向の奥
に発光素子Diが配される。つまり各発光素子Diは
半回転楕円状内面の奥に位置されている。このよ
うに対向内周面49a,49b、斜面49c,4
9dにより各発光素子Diよりの光は方向付けられ
てリング状照射面52が形成される。必要に応じ
てこれら対向内周面49a,49b、斜面49
c,49dには白色塗料或はアルミニウムの蒸着
などの表面処理が施されて発光素子Diよりの光が
有効に反射されている。 Further, as shown in FIG. 10, the surface of the light ring forming housing 48 on the wiring board 47 side gradually approaches the ring-shaped light irradiation surface 52 between adjacent light emitting elements D i , as shown in the cross section along the ring. Sloping slopes 49c and 49d are formed. In other words, the first
In the cross section shown in Figure 0, the light emitting element D i is arranged deep in the short axis direction of the semi-elliptical inner surface. In other words, each light emitting element D i is located deep inside the semi-spheroidal inner surface. In this way, the opposing inner circumferential surfaces 49a, 49b, slopes 49c, 4
9d directs the light from each light emitting element D i to form a ring-shaped irradiation surface 52. These opposing inner circumferential surfaces 49a, 49b and slope 49 as necessary.
The surfaces c and 49d are subjected to surface treatment such as white paint or aluminum vapor deposition, so that the light from the light emitting element D i is effectively reflected.
この実施例においては発光素子Diを8個設けて
45°間隔で取付けたが、発光リング37の必要と
する大きさに応じ、また必要とする光信号の強弱
において発光素子の数を増減することができる。
光リング形成ハウジング48は例えば合成樹脂材
のモールド品として作られ、配線基板47側には
その外周縁及び内周縁の適当な位置に爪53が一
体に突出され、これら爪53を配線基板47の外
周面及び内周面に設けた凹部54を通じて配線基
板47の反対側に突出させ、爪53は配線基板4
7と係合させて配線基板47と光リング形成ハウ
ジング48とを互に固定する。 In this example, eight light emitting elements D i are provided.
Although they are installed at 45° intervals, the number of light emitting elements can be increased or decreased depending on the required size of the light emitting ring 37 and the required strength of the optical signal.
The light ring forming housing 48 is made, for example, as a molded product of synthetic resin material, and claws 53 are integrally protruded from the wiring board 47 side at appropriate positions on the outer peripheral edge and inner peripheral edge of the housing. The claws 53 are made to protrude to the opposite side of the wiring board 47 through recesses 54 provided on the outer peripheral surface and the inner peripheral surface.
7 to fix the wiring board 47 and the optical ring forming housing 48 to each other.
受光部
第4図及び第10図に示すように発光リング3
7のリング状光照射面52と近接対向して受光素
子27が設けられる。受光素子27はリング状光
照射面52からの光を集束するような光集束内
面、例えば半回転楕円状内面55の最も引つ込ん
だ部分に位置される。この光集束内面55の発光
リング37のリングに沿う方向の開口の長さd1は
発光素子Diの隣接間隔d2と同一または僅か大とさ
れる。更に必要に応じて第11図に示すように光
集束内面55の開口部に集束用レンズ56を取付
けることもできる。この光集束内面55にも白色
塗料或はアルミニウム蒸着により表面処理を施す
ことが好ましい。なお受光部モジユール42は先
に述べたように受光素子27とその出力を増幅す
る増幅器28、更に必要に応じて光変換モジユー
ル29がチツプ化され、つまり1個の半導体チツ
プとして構成されており、必要に応じてこの外周
面に対してアルミニウムで雑音に対して遮蔽する
ことができる。Light receiving part Light emitting ring 3 as shown in Fig. 4 and Fig. 10
A light receiving element 27 is provided closely facing the ring-shaped light irradiation surface 52 of No. 7. The light-receiving element 27 is located at the most retracted portion of the light-converging inner surface that focuses the light from the ring-shaped light irradiation surface 52, for example, the semi-spheroidal inner surface 55. The length d 1 of the opening of the light focusing inner surface 55 in the direction along the ring of the light emitting ring 37 is set to be the same as or slightly larger than the interval d 2 between adjacent light emitting elements D i . Further, if necessary, a focusing lens 56 can be attached to the opening of the light focusing inner surface 55 as shown in FIG. It is preferable that this light converging inner surface 55 is also subjected to surface treatment using white paint or aluminum vapor deposition. As mentioned above, the light receiving module 42 includes the light receiving element 27, the amplifier 28 for amplifying its output, and the optical conversion module 29 as needed, that is, it is configured as a single semiconductor chip. If necessary, this outer peripheral surface can be shielded from noise with aluminum.
<他の実施例>
第12図に示すようにシヤフト35の外周に同
軸心的に発光リング37を設け、その端面ではな
く周面にリング状光照射面52を形成し、このリ
ング状光照射面52と対向して変換部43をその
外周に設けてもよい。この場合発光リング37の
配線基板47としては可撓性基板が用いられるこ
とになる。その配線基板47はリング状取付部5
7により軸35に固定される。<Other Examples> As shown in FIG. 12, a light emitting ring 37 is provided coaxially around the outer periphery of the shaft 35, and a ring-shaped light irradiation surface 52 is formed on the circumferential surface instead of the end surface. The conversion portion 43 may be provided on the outer periphery of the surface 52, facing the surface 52. In this case, a flexible substrate is used as the wiring board 47 of the light emitting ring 37. The wiring board 47 has a ring-shaped mounting portion 5
7 is fixed to the shaft 35.
<効果>
以上述べたようにこの考案による車両用多重信
号伝送装置によれば複数の発光素子Diを用い、こ
れらによりほぼ一様のリング状光照射面52を形
成しており、そのリング状光照射面52に対して
受光素子を設けているためステアリングホイール
の回動角位置に拘らず、ほぼ一様な光信号を受信
することができる。このリング状光照射面52を
形成するには例えば樹脂材の成形品によつて対向
内周面49a,49b、斜面49c,49dを所
望の形状に容易に作ることができる。またこれら
面に表面処理を行うことによつて強い光信号を得
ることが可能である。先の例のように負荷側への
伝送を光信号に変換して行う場合は雑音に影響さ
れない特徴が得られる。更に先の例のように受光
素子側に光集光内面55を形成することによつて
受光素子27が隣接発光素子間に位置した場合に
おいても充分強い光信号を受信することが可能で
ある。<Effects> As described above, the multiplex signal transmission device for a vehicle according to this invention uses a plurality of light emitting elements D i , which form a substantially uniform ring-shaped light irradiation surface 52; Since the light receiving element is provided on the light irradiation surface 52, a substantially uniform optical signal can be received regardless of the rotation angle position of the steering wheel. In order to form the ring-shaped light irradiation surface 52, the opposing inner circumferential surfaces 49a, 49b and slopes 49c, 49d can be easily formed into a desired shape using, for example, a resin molded product. Moreover, by performing surface treatment on these surfaces, it is possible to obtain strong optical signals. As in the previous example, when transmission to the load side is performed by converting it into an optical signal, a feature that is not affected by noise can be obtained. Furthermore, by forming the light condensing inner surface 55 on the light receiving element side as in the previous example, it is possible to receive a sufficiently strong optical signal even when the light receiving element 27 is located between adjacent light emitting elements.
第1図は従来の車両用多重信号伝送装置を示す
ブロツク図、第2図はその光導リングと受光素子
の関係を示す図、第3図にこの発明による車両用
多重信号伝送装置の一例における電気系統を示す
ブロツク図、第4図はこの発明による車両用多重
信号伝送装置の構造を示す断面図、第5図は第4
図のAA線断面図、第6図は第4図のBB線断面
図、第7図は発光リング37の分解斜視図、第8
図は発光リングに対して直角な断面図、第9図は
その他の例を示す断面図、第10図は発光リング
及び受光モジユールのリングに沿う断面図、第1
1図は受光部の他の例を示す断面図、第12図は
この発明による車両用多重信号伝送装置の他の例
の構造を示す断面図である。
12:スイツチ、24:多重化回路、25:駆
動回路、27:受光素子、32:多重分離回路、
37:発光リング、47:配線基板、48:光リ
ング形成ハウジング、52:リング状光照射面、
49a乃至49d:光方向付け用内面、55:集
束用曲面、D1乃至Do:発光素子。
FIG. 1 is a block diagram showing a conventional vehicle multiplex signal transmission device, FIG. 2 is a diagram showing the relationship between the light guide ring and the light receiving element, and FIG. 3 is an electrical diagram of an example of the vehicle multiplex signal transmission device according to the present invention. A block diagram showing the system, FIG. 4 is a sectional view showing the structure of the vehicle multiplex signal transmission device according to the present invention, and FIG.
6 is a sectional view taken along line BB in FIG. 4, FIG. 7 is an exploded perspective view of the light emitting ring 37, and FIG.
The figure is a sectional view perpendicular to the light emitting ring, FIG. 9 is a sectional view showing another example, FIG. 10 is a sectional view along the ring of the light emitting ring and the light receiving module, and the first
FIG. 1 is a sectional view showing another example of the light receiving section, and FIG. 12 is a sectional view showing the structure of another example of the vehicle multiplex signal transmission device according to the present invention. 12: switch, 24: multiplexing circuit, 25: drive circuit, 27: light receiving element, 32: multiplexing/demultiplexing circuit,
37: light emitting ring, 47: wiring board, 48: light ring forming housing, 52: ring-shaped light irradiation surface,
49a to 49d: inner surface for directing light, 55: curved surface for focusing, D 1 to D o : light emitting element.
Claims (1)
のスイツチ入力に応じた信号を多重化し、その多
重化信号を発生する多重化回路と、その多重化信
号により同時に駆動される複数の発光素子と、上
記ステアリングハンドルのシヤフトを中心とした
円周上に上記複数の発光素子のチツプがほぼ等角
間隔で取付けられ、かつステアリングシヤフトと
一体に回転する回転部に設けられた配線基板と、
上記配線基板に設けられ、上記配線基板から遠ざ
かるに従つて上記各発光素子を中心として漸次開
くような反射面とされ、それぞれの各発光素子か
らの光をその反射面によつて方向づけて全体とし
てほぼ一様な一つのリング状光照射面を形成する
光リング形成用ハウジングと、上記リング状照射
面と近接対向して車体側の固定部に設けられた受
光素子と、その受光素子により受信された信号を
増幅整形し、上記多重化信号を多重分離する多重
分離回路とを具備する車両用多重信号伝送装置。1. A multiplexing circuit that multiplexes signals corresponding to inputs from a plurality of switches mounted on the steering wheel and generates the multiplexed signal, a plurality of light emitting elements simultaneously driven by the multiplexed signal, and the steering wheel. a wiring board provided on a rotating part that rotates together with the steering shaft, on which chips of the plurality of light emitting elements are mounted at approximately equal angular intervals on a circumference around the shaft;
A reflecting surface is provided on the wiring board and gradually opens around each of the light emitting elements as it moves away from the wiring board, and the light from each light emitting element is directed by the reflecting surface to reflect the light as a whole. A housing for forming a light ring forming a substantially uniform ring-shaped light irradiation surface, a light receiving element provided on a fixed part on the vehicle body side in close opposition to the ring-shaped light irradiation surface, and light received by the light receiving element. and a demultiplexing circuit that amplifies and shapes the multiplexed signal and demultiplexes the multiplexed signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58063959A JPS59188799A (en) | 1983-04-11 | 1983-04-11 | Multiplex signal transmitter for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58063959A JPS59188799A (en) | 1983-04-11 | 1983-04-11 | Multiplex signal transmitter for vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59188799A JPS59188799A (en) | 1984-10-26 |
JPH0373920B2 true JPH0373920B2 (en) | 1991-11-25 |
Family
ID=13244355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58063959A Granted JPS59188799A (en) | 1983-04-11 | 1983-04-11 | Multiplex signal transmitter for vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59188799A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01185798A (en) * | 1988-01-20 | 1989-07-25 | Toshiba Corp | Optical slip ring device |
JP2512732Y2 (en) * | 1990-11-16 | 1996-10-02 | 株式会社豊田中央研究所 | Optical telemeter device |
EP2073407B1 (en) * | 2007-12-17 | 2012-06-06 | Siemens Aktiengesellschaft | Machine with data transmission from one machine component to another machine component which is pivotable in relation to the first machine component |
JP6684671B2 (en) | 2016-07-11 | 2020-04-22 | 株式会社東海理化電機製作所 | Rotating connector |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56149288A (en) * | 1980-04-23 | 1981-11-19 | Mitsubishi Heavy Ind Ltd | Semisubmerged catamaran having propeller shaft capable of tilting |
-
1983
- 1983-04-11 JP JP58063959A patent/JPS59188799A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56149288A (en) * | 1980-04-23 | 1981-11-19 | Mitsubishi Heavy Ind Ltd | Semisubmerged catamaran having propeller shaft capable of tilting |
Also Published As
Publication number | Publication date |
---|---|
JPS59188799A (en) | 1984-10-26 |
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