JPH07192348A - Tape end detecting device - Google Patents
Tape end detecting deviceInfo
- Publication number
- JPH07192348A JPH07192348A JP5347393A JP34739393A JPH07192348A JP H07192348 A JPH07192348 A JP H07192348A JP 5347393 A JP5347393 A JP 5347393A JP 34739393 A JP34739393 A JP 34739393A JP H07192348 A JPH07192348 A JP H07192348A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- hub
- take
- supply
- capstan
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、テープデッキのテープ
エンド検出に関する装置である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a tape end of a tape deck.
【０００２】[0002]
【従来の技術】従来のテープレコーダ技術では、テープ
エンドを検出するために、図１に示すごときテイクアッ
プ側のハブ７の回転停止をテイクアップ側のエンコーダ
ー４とテイクアップ側リールセンサー６により、マイコ
ン１０に検出し図示せずもモータで駆動する回転を制御
していた。2. Description of the Related Art In the conventional tape recorder technique, in order to detect the tape end, the rotation stop of the hub 7 on the take-up side as shown in FIG. 1 is detected by an encoder 4 on the take-up side and a reel-up sensor 6 on the take-up side. The rotation detected by the microcomputer 10 and driven by a motor (not shown) was controlled.
【０００３】[0003]
【発明が解決しようとする課題】従来の技術では、テー
プエンドをテイクアップ側のリールの回転停止、すなわ
ち、テープの走行停止を検出して判断していた。このた
めテープの駆動停止はテープの走行停止後に行われる事
になるので、その間、キャプスタンとピンチローラーに
よる強力なテープ駆動力が働き強い張力がサプライ側の
停止したテープに無理に加わる事になり、テープの伸び
等のダメージをテープに与えてしまう欠点があった。本
発明は、テープエンドでテープが走行を停止する直前に
テープエンドを検出できるように成すもので、テープの
停止張力が加わる前に駆動力を停止する事により、テー
プにダメージを与える事を防止する装置を提供する事が
できる。In the prior art, the tape end is judged by detecting the rotation stop of the reel on the take-up side, that is, the tape running stop. For this reason, the tape drive will be stopped after the tape has stopped running, and during that time, a strong tape drive force will be applied by the capstan and pinch roller, and a strong tension will be forcibly applied to the stopped tape on the supply side. However, there is a drawback that damage such as stretching of the tape is given to the tape. The present invention is designed so that the tape end can be detected immediately before the tape stops traveling at the tape end. By stopping the drive force before the tape stop tension is applied, damage to the tape is prevented. It is possible to provide a device that does.
【０００４】[0004]
【課題を解決するための手段】本発明は、サプライ側ハ
ブの回転角の速度を検出する検出手段と、回転速度変化
を判別して所定以上の回転速度上昇を検出手段が検出し
たときテープの駆動を停止させる手段を有するものであ
る。DISCLOSURE OF THE INVENTION The present invention is directed to a detecting means for detecting the rotational speed of a supply hub and a tape for a tape when the detecting means detects an increase in the rotational speed by discriminating a change in the rotational speed. It has means for stopping the driving.
【０００５】[0005]
【実施例】図１に本発明のテープトランスポート部の一
例を示す。サプライ側のハブ２とこれの回転角速度を検
出するためのエンコーダーパターン３を設けこの回転を
検出し回転角速度を求めるサプライ側のリールセンサー
５により検出した信号がマイコン１０に入力されるサプ
ライ側リールの角速度ωがマイコン１０で計算され、図
２に示す値となり通常の状態ではキャプスタン８とピン
チローラー９によりテープ１が定速ｖでローラ１１，１
１’を介しトランスポートされ、テイクアップ側のハブ
７にテープ１は巻き取られる。ところが最後の約１／４
回転に入る期間ｔでは、図３に示すテープエンド近辺の
テープの動作を示すごとく、通常のテープ１の巻回の位
置は(ａ)であり、テープ終了直前での１／４回転の位置
では(ｂ)から(ｃ)となり、完全にテープが終了した状態
での位置を示す。(ａ)の位置ではハブ２の角速度ωは、
ハブ２の半径をＲ１，テープ１の速度をｖとするとω＝
ｖ／Ｒ１で表されるが、(ｂ)の位置では、ω＝ｖ／Ｒ２
となり、２の位置から、完全にテープが終了する(ｃ)の
位置(テープエンド)まで、角速度ωは、図２に示す様に
上昇する。このωが所定の値Ａ以上になった時、マイコ
ン１０はそれをテープエンドとして判別しピンチローラ
ー９及びテイクアップ側ハブ７を駆動する巻き取りモー
タ（図示せずも）をただちに停止させる。FIG. 1 shows an example of the tape transport section of the present invention. A supply side hub 2 and an encoder pattern 3 for detecting the rotation angular velocity thereof are provided, and a signal detected by a supply side reel sensor 5 that detects the rotation and obtains the rotation angular velocity is input to a microcomputer 10. The angular velocity ω is calculated by the microcomputer 10 and becomes the value shown in FIG. 2, and in a normal state, the tape 1 is rotated at a constant velocity v by the capstan 8 and the pinch roller 9 so that the rollers 11, 1
1 ', and the tape 1 is wound around the hub 7 on the take-up side. But about the last quarter
In the period t to start the rotation, as shown in the operation of the tape near the tape end shown in FIG. 3, the normal winding position of the tape 1 is (a), and at the 1/4 rotation position immediately before the end of the tape. From (b) to (c), it shows the position when the tape is completely finished. At the position (a), the angular velocity ω of the hub 2 is
If the radius of the hub 2 is R1 and the speed of the tape 1 is v, then ω =
It is represented by v / R1, but at the position of (b), ω = v / R2
Then, from the position 2 to the position (tape end) (c) where the tape is completely finished, the angular velocity ω increases as shown in FIG. When this ω becomes equal to or larger than the predetermined value A, the microcomputer 10 discriminates it as a tape end and immediately stops the winding motor (not shown) that drives the pinch roller 9 and the take-up side hub 7.
【０００６】[0006]
【発明の効果】本発明により、テープがその終端で完全
に停止する前にピンチローラー９、キャプスタン８から
テープを外しテープの駆動を停止する事ができ、テープ
に過大な張力が加わらないので、テープに伸び等のダメ
ージを与えない。また、停止時のテープ巻き締め時のキ
シミ音も防止でき、次の動作に移る時間も短縮する事が
できる。According to the present invention, the tape can be removed from the pinch roller 9 and the capstan 8 before the tape is completely stopped at the end of the tape, and the tape drive can be stopped, so that an excessive tension is not applied to the tape. , Does not give damage such as stretching to the tape. Further, it is possible to prevent squeaking noise when the tape is fastened when the tape is stopped, and it is possible to shorten the time to move to the next operation.
【図１】テープレコーダのテープ移動構成を示す。FIG. 1 shows a tape moving structure of a tape recorder.
【図２】角速度の変化を示す図。FIG. 2 is a diagram showing a change in angular velocity.
【図３】角速度の変化を説明する図。FIG. 3 is a diagram illustrating a change in angular velocity.
１ テープ ２，７ ハブ ３，４ エンコーダ ５，６ リールセンサー ８ キャプスタン ９ ピンチローラ １０ マイコン １１，１１’ ローラ 1 Tape 2, 7 Hub 3, 4, Encoder 5, 6 Reel Sensor 8 Capstan 9 Pinch Roller 10 Microcomputer 11, 11 'Roller
Claims (1)
プ側ハブへトランスポートし記録再生するテープレコー
ダに於いて、テープをサプライする側に設けた検出手段
でテープ供給が終了する直前に、一定速度で送られてい
るテープがサプライ側ハブの最後の約１／４回転の間で
のサプライ側リールの回転角速度変化する事を検出して
テープの巻き取りを停止せしめる手段を有する事を特徴
とするテープエンド検出装置。1. A tape recorder that transports a tape from a supply-side hub to a take-up-side hub and records / reproduces the tape at a constant speed immediately before the tape supply is completed by a detection means provided on the tape supply side. A tape characterized by having a means for stopping the winding of the tape by detecting that the tape being fed changes the rotational angular velocity of the supply reel during the last approximately 1/4 rotation of the supply hub. End detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5347393A JPH07192348A (en) | 1993-12-25 | 1993-12-25 | Tape end detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5347393A JPH07192348A (en) | 1993-12-25 | 1993-12-25 | Tape end detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07192348A true JPH07192348A (en) | 1995-07-28 |
Family
ID=18389925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5347393A Withdrawn JPH07192348A (en) | 1993-12-25 | 1993-12-25 | Tape end detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07192348A (en) |
-
1993
- 1993-12-25 JP JP5347393A patent/JPH07192348A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010306 |