JP2000208223A - Transmission device between rotary body and fixed body - Google Patents
Transmission device between rotary body and fixed bodyInfo
- Publication number
- JP2000208223A JP2000208223A JP2000018377A JP2000018377A JP2000208223A JP 2000208223 A JP2000208223 A JP 2000208223A JP 2000018377 A JP2000018377 A JP 2000018377A JP 2000018377 A JP2000018377 A JP 2000018377A JP 2000208223 A JP2000208223 A JP 2000208223A
- Authority
- JP
- Japan
- Prior art keywords
- flat cable
- case
- winding
- fixed
- transmission device
- 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.)
- Granted
Links
Landscapes
- Steering Controls (AREA)
- Electric Cable Arrangement Between Relatively Moving Parts (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、回転体と固定体間で電
気信号、光信号あるいは電力などを伝送するのに用いる
伝送装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission device used for transmitting an electric signal, an optical signal or electric power between a rotating body and a fixed body.
【0002】[0002]
【従来の技術】従来、例えば自動車のステアリング軸側
(回転体)とコラム側(固定体)との間で信号の伝送を
行う場合には、図2および図3に示すような伝送装置が
用いられている(実開昭62-168581 号公報)。2. Description of the Related Art Conventionally, when a signal is transmitted between a steering shaft side (rotating body) and a column side (fixed body) of an automobile, a transmission device as shown in FIGS. 2 and 3 is used. (Japanese Unexamined Utility Model Publication No. Sho 62-168581).
【0003】この伝送装置は、ゼンマイ状に巻かれたフ
ラットケーブル11と、それを収納する内側ケース13およ
び外側ケース15とを備えている。フラットケーブル11の
内端は内側ケース13の胴部13aに固定され、そこで一方
のリード線17に接続されており、かつフラットケーブル
11の外端は外側ケース15の外筒部15aに固定され、そこ
で他方のリード線19に接続されている。内側ケース13と
外側ケース15は相対的に回転可能に組み合わされてい
る。[0003] This transmission device includes a flat cable 11 wound in a spiral shape, and an inner case 13 and an outer case 15 for housing the flat cable 11. The inner end of the flat cable 11 is fixed to the body 13a of the inner case 13, where it is connected to one lead wire 17, and
The outer end of 11 is fixed to the outer cylindrical portion 15a of the outer case 15, where it is connected to the other lead wire 19. The inner case 13 and the outer case 15 are combined so as to be relatively rotatable.
【0004】したがって例えば内側ケース13を回転体に
取り付け、外側ケース15を固定体に取り付ければ、ゼン
マイ巻きされたフラットケーブル11の巻き締まり、巻き
広がりが可能な範囲で、回転体と固定体間で信号伝送が
行える。このタイプの伝送装置は回転体が往復回転する
場合に用途が限られるが、摺動接触部を有しないため信
頼性の高い伝送線路を構成できる。このような伝送装置
は例えば自動車の車体側から、回転体であるステアリン
グ軸上に設置されたエアバッグシステムへの電気信号の
伝達等に使用される。Therefore, for example, if the inner case 13 is mounted on a rotating body and the outer case 15 is mounted on a fixed body, the flat cable 11 wound by the mainspring can be tightened and spread between the rotating body and the fixed body as far as possible. Signal transmission can be performed. The use of this type of transmission device is limited when the rotating body reciprocates, but since it does not have a sliding contact portion, a highly reliable transmission line can be configured. Such a transmission device is used, for example, for transmitting an electric signal from an automobile body side to an airbag system installed on a steering shaft which is a rotating body.
【0005】[0005]
【発明が解決しようとする課題】このような伝送装置で
は、内側ケースと外側ケースが相対的に回転可能な回数
は、フラットケーブルの巻回数によって定まるので、回
転可能回数を多くしようとすれば、フラットケーブルの
巻回数を多く(長さを長く)しなければならない。しか
しフラットケーブルの巻回数を多くすると、回転体側の
回転力がフラットケーブル全体に伝わり難くなるため、
例えばフラットケーブルの反転屈曲などのトラブルが発
生しやすくなる。またフラットケーブルの長さが長くな
れば、導体の電気抵抗が大きくなるとか、信号の伝達時
間が長くなる等の問題もある。In such a transmission device, the number of relative rotations of the inner case and the outer case is determined by the number of turns of the flat cable. The number of turns of the flat cable must be increased (length must be longer). However, if the number of turns of the flat cable is increased, the rotational force on the rotating body side will not be easily transmitted to the entire flat cable.
For example, troubles such as inversion and bending of the flat cable are likely to occur. In addition, if the length of the flat cable is increased, there are also problems such as an increase in electric resistance of the conductor and an increase in signal transmission time.
【0006】このためフラットケーブルの巻回数を少な
くできるものとして図4のような伝送装置も提案されて
いる。この伝送装置は、内側ケース13の胴部13aにフラ
ットケーブル11の内端を固定すると共に外側ケース15の
外筒部15aにフラットケーブル11の外端を固定し、かつ
フラットケーブル11の内端側を胴部13aに一方向に巻き
付けると共に、フラットケーブル11の外端側を内端側と
は巻き方向が逆になるように外筒部15aの内側に巻き込
み、これによってフラットケーブル11の中間部に巻き方
向反転部11aを設けたものである。For this reason, a transmission device as shown in FIG. 4 has been proposed as a device capable of reducing the number of turns of a flat cable. This transmission device fixes the inner end of the flat cable 11 to the body 13a of the inner case 13 and the outer end of the flat cable 11 to the outer cylindrical portion 15a of the outer case 15; Is wound around the body 13a in one direction, and the outer end side of the flat cable 11 is wound inside the outer cylindrical portion 15a so that the winding direction is opposite to that of the inner end side. This is provided with a winding direction reversing part 11a.
【0007】この装置では、例えば外側ケース15を固定
して内側ケース13を反時計方向に回転させると、フラッ
トケーブル11の反転部11aも反時計まわりに移動して、
両ケース13、15間の相対的な回転が半ば打ち消されるよ
うになるので、フラットケーブル11の巻回数を少なく
(長さを短く)することが可能となる。In this device, for example, when the outer case 15 is fixed and the inner case 13 is rotated in a counterclockwise direction, the reversing portion 11a of the flat cable 11 also moves counterclockwise,
Since the relative rotation between the two cases 13 and 15 is canceled halfway, the number of turns of the flat cable 11 can be reduced (the length thereof can be reduced).
【0008】しかしこの装置は、上記とは逆に、内側ケ
ース13を時計方向に回転させようとすると、内側ケース
13に巻かれているフラットケーブル11にたるみが生じ、
反転部11aが時計方向に移動しない状態が発生しやすく
なるため、結果的に正常な回転動作ができないという問
題がある。このためこの方式の伝送装置は実用化されて
いないのが実情である。[0008] However, this device, on the contrary, attempts to rotate the inner case 13 in the clockwise direction.
The flat cable 11 wound around 13 has slack,
Since the state in which the reversing portion 11a does not move in the clockwise direction is likely to occur, there is a problem that a normal rotation operation cannot be performed as a result. For this reason, the transmission apparatus of this system has not been put to practical use.
【0009】本発明の目的は、上記のような問題点に鑑
み、フラットケーブルの中間部に巻き方向反転部を設け
る方式で、フラットケーブルのたるみによるトラブルの
発生を確実に防止できる伝送装置を提供することにあ
る。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a transmission apparatus which can reliably prevent occurrence of a trouble due to slack of a flat cable by providing a winding direction reversing section at an intermediate portion of the flat cable. Is to do.
【0010】[0010]
【課題を解決するための手段】この目的を達成するため
本発明は、胴部を有する内側ケースと、前記胴部の外周
に位置する外筒部を有する外側ケースとを相対的に回転
できるように組み合わせ、前記胴部にフラットケーブル
の内端を固定すると共に前記外筒部にフラットケーブル
の外端を固定し、かつフラットケーブルの内端側を前記
胴部に一方向に巻き付けると共に、フラットケーブルの
外端側を内端側とは巻き方向が逆になるように前記外筒
部の内側に巻き込み、これによりフラットケーブルの中
間部に内側ケースまたは外側ケースの回転によって移動
する巻き方向反転部を設けてなる回転体と固定体間の伝
送装置において、前記フラットケーブルを複数枚巻き重
ね、各フラットケーブルの巻き方向反転部を周方向に間
隔をあけて複数箇所に配置したことを特徴とするもので
ある。SUMMARY OF THE INVENTION In order to achieve this object, the present invention provides an inner case having a body and an outer case having an outer cylinder located on the outer periphery of the body. And fixing the inner end of the flat cable to the body, fixing the outer end of the flat cable to the outer cylinder, and wrapping the inner end of the flat cable around the body in one direction. The outer end side of the flat cable is wound inside the outer cylindrical portion so that the winding direction is opposite to that of the inner end side, thereby forming a winding direction reversing portion that is moved by rotation of the inner case or the outer case in the middle portion of the flat cable. In the transmission device between the rotating body and the fixed body provided, a plurality of the flat cables are wound, and a plurality of the winding direction reversing portions of each flat cable are circumferentially spaced. It is characterized in that it has disposed.
【0011】[0011]
【作用】フラットケーブルの巻き方向反転部は弾性変形
させられているため弾性反発力を有しており、このよう
な巻き方向反転部が周方向の複数箇所に分布している
と、それぞれの箇所でフラットケーブルの内端側が胴部
に、外端側が外筒部に押し付けられるため、内側ケース
または外側ケースを回転させたときのフラットケーブル
のたるみが抑制され、内側ケースまたは外側ケースの回
転によってフラットケーブルの巻き方向反転部が確実に
移動するようになる。The winding direction reversing portion of the flat cable has an elastic repulsive force because it is elastically deformed. If such winding direction reversing portions are distributed at a plurality of positions in the circumferential direction, the respective positions are changed. Because the inner end of the flat cable is pressed against the body and the outer end against the outer cylinder, the slack of the flat cable when the inner case or outer case is rotated is suppressed, and the flat cable is rotated by rotating the inner case or outer case. The winding direction reversing part of the cable is reliably moved.
【0012】[0012]
【実施例】以下、本発明の実施例を図面を参照して詳細
に説明する。図1は本発明の一実施例を示す。この伝送
装置は、4枚のフラットケーブル11A、11B、11C、11
Dを巻き重ねたものである。11a、11b、11c、11dは
フラットケーブル11A、11B、11C、11Dの巻き方向反
転部である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. This transmission device has four flat cables 11A, 11B, 11C, 11
D is wound. 11a, 11b, 11c and 11d are winding direction reversing parts of the flat cables 11A, 11B, 11C and 11D.
【0013】各フラットケーブル11A〜11Dは、内端が
内側ケースの胴部13aに固定され、外端が外側ケースの
外筒部15aに固定され、かつ内端側を胴部13aに一方向
に巻き付けると共に、外端側を内端側とは巻き方向が逆
になるように外筒部15aの内側に巻き込んで、中間部に
巻き方向反転部11a〜11dが設けられている。フラット
ケーブル11A〜11Dの巻き方向反転部11a〜11dは周方
向にほぼ等しい間隔をあけて配置されている。Each of the flat cables 11A to 11D has an inner end fixed to the body 13a of the inner case, an outer end fixed to the outer cylinder 15a of the outer case, and an inner end in one direction to the body 13a. At the same time as winding, the outer end side is wound inside the outer cylindrical portion 15a so that the winding direction is opposite to that of the inner end side, and winding direction reversing portions 11a to 11d are provided at the intermediate portion. The winding direction reversing portions 11a to 11d of the flat cables 11A to 11D are arranged at substantially equal intervals in the circumferential direction.
【0014】これにより各フラットケーブル11A〜11D
は周方向の4箇所で各巻き方向反転部11a〜11dの弾性
反発力により胴部13aおよび外筒部15aに押し付けられ
るため、内側ケース13または外側ケース15を往復回転さ
せても、たるみが発生することがなくなり、フラットケ
ーブルのたるみによるトラブルの発生をなくすことがで
きる。Thus, each of the flat cables 11A to 11D
Is pressed against the body portion 13a and the outer cylindrical portion 15a by the elastic repulsive force of the winding direction reversing portions 11a to 11d at four positions in the circumferential direction. And the occurrence of trouble due to slackness of the flat cable can be eliminated.
【0015】[0015]
【発明の効果】以上説明したように本発明によれば、各
フラットケーブルの巻き方向反転部の弾性反発力により
各フラットケーブルが周方向の複数箇所で胴部および外
筒部に押し付けられるため、内側ケースまたは外側ケー
スを回転させたときにフラットケーブルのたるみが抑制
され、巻き方向反転部が内側ケースまたは外側ケースの
回転に応じて確実に移動するようになる。このためフラ
ットケーブルの中間部に巻き方向反転部を有する方式の
伝送装置においてフラットケーブルのたるみによるトラ
ブルを確実に防止できるので、フラットケーブルの長さ
の短い、動作の安定した(あるいはフラットケーブルの
長さの割に回転体の可能回転回数の大きい)伝送装置を
得ることができる。As described above, according to the present invention, each flat cable is pressed against the body and the outer cylindrical portion at a plurality of positions in the circumferential direction by the elastic repulsive force of the winding direction reversing portion of each flat cable. When the inner case or the outer case is rotated, the slack of the flat cable is suppressed, and the winding direction reversing portion is reliably moved according to the rotation of the inner case or the outer case. For this reason, in a transmission device having a winding direction reversing portion in the middle portion of the flat cable, trouble due to slack of the flat cable can be reliably prevented, so that the flat cable has a short length and stable operation (or a flat cable length). Therefore, a transmission device having a large number of possible rotations of the rotating body can be obtained.
【図1】 本発明に係る伝送装置の一実施例を示す横断
面図。FIG. 1 is a cross-sectional view showing one embodiment of a transmission device according to the present invention.
【図2】 従来の伝送装置の横断面図。FIG. 2 is a cross-sectional view of a conventional transmission device.
【図3】 図2の伝送装置の縦断面図。FIG. 3 is a longitudinal sectional view of the transmission device of FIG. 2;
【図4】 フラットケーブルの中間部に巻き方向反転部
を有する方式の伝送装置の横断面図。FIG. 4 is a cross-sectional view of a transmission device of a system having a winding direction reversing portion at an intermediate portion of a flat cable.
11A、11B、11C、11D:フラットケーブル 11a、11b、11c、11d:巻き方向反転部 13:内側ケース 13a:胴部 15:外側ケース 15a:外筒部 11A, 11B, 11C, 11D: flat cable 11a, 11b, 11c, 11d: winding direction reversing part 13: inner case 13a: trunk 15: outer case 15a: outer cylinder
Claims (1)
周に位置する外筒部を有する外側ケースとを相対的に回
転できるように組み合わせ、前記胴部にフラットケーブ
ルの内端を固定すると共に前記外筒部にフラットケーブ
ルの外端を固定し、かつフラットケーブルの内端側を前
記胴部に一方向に巻き付けると共に、フラットケーブル
の外端側を内端側とは巻き方向が逆になるように前記外
筒部の内側に巻き込み、これによりフラットケーブルの
中間部に内側ケースまたは外側ケースの回転によって移
動する巻き方向反転部を設けてなる回転体と固定体間の
伝送装置において、前記フラットケーブルを複数枚巻き
重ね、各フラットケーブルの巻き方向反転部を周方向に
間隔をあけて複数箇所に配置したことを特徴とする回転
体と固定体間の伝送装置。An inner case having a body portion and an outer case having an outer cylindrical portion located on the outer periphery of the body portion are combined so as to be relatively rotatable, and an inner end of a flat cable is fixed to the body portion. At the same time, the outer end of the flat cable is fixed to the outer tube, and the inner end of the flat cable is wound around the body in one direction, and the outer end of the flat cable is wound in the opposite direction to the inner end. In the transmission device between the rotating body and the fixed body, which is provided with a winding direction reversing part which is wound around the inside of the outer cylindrical part so as to be moved by the rotation of the inner case or the outer case in the middle part of the flat cable, A plurality of the flat cables are wound, and a winding direction reversing part of each flat cable is arranged at a plurality of positions at intervals in a circumferential direction, wherein a transmission between the rotating body and the fixed body is provided. Apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000018377A JP3374113B2 (en) | 1992-02-20 | 2000-01-27 | Transmission device between rotating body and fixed body |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4069385A JP3050688B2 (en) | 1992-02-20 | 1992-02-20 | Transmission device between rotating body and fixed body |
JP2000018377A JP3374113B2 (en) | 1992-02-20 | 2000-01-27 | Transmission device between rotating body and fixed body |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4069385A Division JP3050688B2 (en) | 1992-02-20 | 1992-02-20 | Transmission device between rotating body and fixed body |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000208223A true JP2000208223A (en) | 2000-07-28 |
JP3374113B2 JP3374113B2 (en) | 2003-02-04 |
Family
ID=26410587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000018377A Expired - Lifetime JP3374113B2 (en) | 1992-02-20 | 2000-01-27 | Transmission device between rotating body and fixed body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3374113B2 (en) |
-
2000
- 2000-01-27 JP JP2000018377A patent/JP3374113B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP3374113B2 (en) | 2003-02-04 |
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