JPH0695435B2 - Magnetic recording / reproducing device - Google Patents
Magnetic recording / reproducing deviceInfo
- Publication number
- JPH0695435B2 JPH0695435B2 JP61238323A JP23832386A JPH0695435B2 JP H0695435 B2 JPH0695435 B2 JP H0695435B2 JP 61238323 A JP61238323 A JP 61238323A JP 23832386 A JP23832386 A JP 23832386A JP H0695435 B2 JPH0695435 B2 JP H0695435B2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- magnetic
- magnetic tape
- length
- measuring
- 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 - Fee Related
Links
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、磁気テープの残量計測を正確に行ない得る磁
気記録再生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 magnetic recording / reproducing apparatus capable of accurately measuring the remaining amount of a magnetic tape.
従来の技術 従来、磁気記録再生装置ではテープ残量を計算で求めて
いる。この計算する方法は、たとえば特開昭61−71440
号公報にも示されているように、 T2＝T0−T1 ……（１） から求めている。2. Description of the Related Art Conventionally, in a magnetic recording / reproducing apparatus, the remaining tape amount is calculated. This calculation method is disclosed in, for example, JP-A-61-71440.
As shown in the publication, T 2 = T 0 −T 1 (1) Seeking from.
ここで、T0は録再可能な全テープ時間（これはテープ走
行速度に依存する）、T1は巻き取り側リールに巻かれて
いるテープ残量時間、T2は供給側リールに巻かれている
テープ残量時間、P1は現時点の巻き取り側リールの回転
周期、P2は供給側リールの回転周期、r0は最大テープ巻
き径、およびＲはリールのハブ径をそれぞれ示してい
る。したがって従来の磁気記録再生装置では、テープの
種類（r0,R）、テープ速度（T0）、および巻き取り側，
供給側リールの回転周期（P1,P2）を計測し、これらの
計測値を上記計算式を用いて、テープ残量時間T2を求め
ていた。Where T 0 is the total rewritable tape time (this depends on the tape running speed), T 1 is the time remaining on the take-up reel, and T 2 is the take-up reel. Tape remaining time, P 1 is the current rotation cycle of the winding reel, P 2 is the rotation cycle of the supply reel, r 0 is the maximum tape winding diameter, and R is the reel hub diameter. . Therefore, in the conventional magnetic recording / reproducing apparatus, the tape type (r 0 , R), the tape speed (T 0 ), the winding side,
The rotation period (P 1 , P 2 ) of the supply-side reel was measured, and the remaining time T 2 of the tape was calculated by using the above-mentioned calculation formulas for these measured values.
発明が解決しようとする問題点 しかしながら上記のような構成では、テープ厚みや、リ
ールのハブ径のバラツキもしくはテープロールへのエア
ーフィルムの出来具合による最大テープ巻き径がバラツ
クためテープ残量時間を正確に計測することはできなか
った。Problems to be Solved by the Invention However, in the above configuration, the tape remaining time is accurate because the maximum tape winding diameter varies due to variations in tape thickness, reel hub diameter, or the quality of air film on the tape roll. I couldn't measure it.
本発明は上記問題点に鑑み、テープ残量時間を正確に計
測し得る磁気記録再生装置を提供するものである。In view of the above problems, the present invention provides a magnetic recording / reproducing apparatus capable of accurately measuring the remaining tape time.
問題点を解決するための手段 上記問題点を解決するために、本発明の磁気記録再生装
置は、磁気テープと当接し、前記磁気テープによって回
転駆動されることにより前記磁気テープの移送長さを計
測するテープ長計測手段と、カセット内から前記磁気テ
ープを前記テープ長計測手段に当接するように引き出す
テープ引き出し手段と、前記テープ引き出し手段で引き
出された磁気テープを高速で走行させる第一のテープ駆
動手段と、前記テープ引き出し手段で引き出された磁気
テープを定速で走行させる第二のテープ駆動手段と、前
記第一のテープ駆動手段によって前記磁気テープを高速
で終端まで走行させた後、元の位置までまきもどし動作
をさせ、前記テープ長計測手段によって終端までのテー
プ長を計測し、前記テープ長と前記第二のテープ駆動手
段のテープ駆動速度とからテープ残量時間を計測するテ
ープ残量計測手段という構成を備えたものである。Means for Solving the Problems In order to solve the above problems, the magnetic recording / reproducing apparatus of the present invention contacts a magnetic tape and is rotationally driven by the magnetic tape to reduce the transfer length of the magnetic tape. Tape length measuring means for measuring, tape pulling means for pulling out the magnetic tape from the cassette so as to abut against the tape length measuring means, and first tape for running the magnetic tape pulled out by the tape pulling means at high speed After the driving means, the second tape driving means for causing the magnetic tape drawn out by the tape drawing means to run at a constant speed, and the first tape driving means for running the magnetic tape to the end at high speed, And the tape length to the end is measured by the tape length measuring means, and the tape length and the second tape are measured. The tape remaining amount measuring means for measuring the tape remaining time from the tape driving speed of the loop driving means is provided.
作用 本発明は上記した構成によって、磁気テープの走行した
長さ（所定位置からテープ終端までのテープ長）をテー
プ長計測手段によって直接計測し、前記テープ長とテー
プの定速駆動速度とからテープ残量時間を計測するので
テープ厚みや、ハブ径や、最大テープ巻き径のバラツキ
の影響を受けず正確なテープ残量時間を計測できるもの
である。With the above-described structure, the present invention directly measures the running length of the magnetic tape (the tape length from the predetermined position to the end of the tape) by the tape length measuring means, and determines the tape from the tape length and the constant drive speed of the tape. Since the remaining time is measured, the tape remaining time can be accurately measured without being affected by variations in tape thickness, hub diameter, and maximum tape winding diameter.
実施例 以下本発明の一実施例の磁気記録再生装置について画面
を参照しながら説明する。Embodiment A magnetic recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to screens.
第１図は本発明の一実施例の磁気記録再生装置の要部平
面図である。第１図において、カセット１内の供給リー
ル2,巻取りリール３に巻回された磁気テープ４は、テー
プ引き出し手段5,6,7によってカセット外部に引き出さ
れ、回転ローラ8,回転ヘッドシリンダ９に添接される。
回転ローラ８は磁気テープ４の走行によって回転させら
れ、その回転数は周知の光や磁気を利用したエンコーダ
によって計測できるようにしてあるので結局磁気テープ
の走行長さを計測できる。FIG. 1 is a plan view of an essential part of a magnetic recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, the magnetic tape 4 wound around the supply reel 2 and the take-up reel 3 in the cassette 1 is pulled out of the cassette by the tape pull-out means 5, 6, and 7, and the rotary roller 8 and the rotary head cylinder 9 are provided. Will be inscribed on.
The rotating roller 8 is rotated by the running of the magnetic tape 4, and the number of rotations thereof can be measured by a known encoder utilizing light or magnetism, so that the running length of the magnetic tape can be measured.
キャプスタン10,ピンチローラ11は磁気テープ４を挾持
した時、定速で駆動する。駆動車12は転接アイドラ13を
介して供給リール台２もしくは巻取りリール台３を駆動
する。The capstan 10 and the pinch roller 11 are driven at a constant speed when the magnetic tape 4 is held. The drive wheel 12 drives the supply reel base 2 or the take-up reel base 3 via the rolling contact idler 13.
以上のように構成された磁気記録再生装置について、第
２図の動作フローチャートに基づいて動作を説明する。The operation of the magnetic recording / reproducing apparatus configured as described above will be described based on the operation flowchart of FIG.
残量計測釦（図示せず）を押圧すると駆動車12が時計回
転するので、転接アイドラ13を介して巻取りリール台３
が回転し磁気テープ４を右方へ移送する。したがって回
転ローラ８も回転をしはじめ、前記したエンコーダによ
り回転ローラ８の回転数を計測しはじめる。磁気テープ
が終端までいくと周知の終端検出手段によって駆動車12
が反転し、今度は転接アイドラ13が供給リール台側に当
接し、供給リール台２が磁気テープ４を逆方向に転送す
るので回転ローラ８も逆回転し、先程エンコーダで計測
した回転数が０になると駆動車13の回転を止め元のテー
プ位置にもどるようにしてある。巻取りリール台３が磁
気テープ４を駆動しはじめてからテープ終端に至るまで
の回転ローラ８の回転数が計測でき、回転ローラ８の径
は既知であるので結局終端までのテープ長が計測でき
る。したがってキャプスタン10とピンチローラ11とによ
る磁気テープ移送速度も既知であるのでテープ残量が正
確に計測できる。When the remaining amount measurement button (not shown) is pressed, the drive wheel 12 rotates clockwise, so the take-up reel stand 3
Rotates to transfer the magnetic tape 4 to the right. Therefore, the rotary roller 8 also starts to rotate, and the encoder described above starts measuring the number of rotations of the rotary roller 8. When the magnetic tape reaches the end, it is driven by a well-known end detection means 12
Is reversed, and this time the rolling contact idler 13 comes into contact with the supply reel base side, and the supply reel base 2 transfers the magnetic tape 4 in the opposite direction, so the rotating roller 8 also rotates in the reverse direction, and the number of rotations measured by the encoder is When it becomes 0, the rotation of the drive wheel 13 is stopped and the tape position is returned to the original position. The number of rotations of the rotating roller 8 from when the take-up reel stand 3 starts to drive the magnetic tape 4 to the end of the tape can be measured. Since the diameter of the rotating roller 8 is known, the tape length up to the end can be measured. Therefore, since the magnetic tape transfer speed by the capstan 10 and the pinch roller 11 is also known, the remaining tape amount can be accurately measured.
以上のように本実施例によれば、磁気テープと当接し、
前記磁気テープによって回転駆動されることにより前記
磁気テープの移送長さを計測するテープ長計測手段と、
カセット内から前記磁気テープを前記テープ長計測手段
に当接するように引き出すテープ引き出し手段と、前記
テープ引き出し手段で引き出された磁気テープを高速で
走行させる第一のテープ駆動手段と、前記テープ引き出
し手段で引き出された磁気テープを定速で走行させる第
二のテープ駆動手段と、前記第一のテープ駆動手段によ
って前記磁気テープを高速で終端まで走行させた後、元
の位置までまきもどし動作をさせ、前記テープ長計測手
段によって終端までのテープ長を計測し、前記テープ長
と前記第二のテープ駆動手段のテープ駆動速度とからテ
ープ残量時間を計測するテープ残量計測手段とを設ける
ことにより、テープ残量を正確に計測することができ
る。As described above, according to this embodiment, the magnetic tape is brought into contact with the magnetic tape,
Tape length measuring means for measuring the transfer length of the magnetic tape by being driven to rotate by the magnetic tape;
Tape pull-out means for pulling out the magnetic tape from inside the cassette so as to contact the tape length measuring means, first tape drive means for running the magnetic tape pulled out by the tape pull-out means at high speed, and the tape pull-out means Second tape drive means for running the magnetic tape pulled out at a constant speed and the first tape drive means for running the magnetic tape at a high speed to the end, and then rewinding operation to the original position. By providing a tape remaining amount measuring means for measuring the tape length to the end by the tape length measuring means and measuring the tape remaining time from the tape length and the tape drive speed of the second tape driving means. The tape remaining amount can be accurately measured.
発明の効果 以上のように本発明は、磁気テープと当接し、前記磁気
テープによって回転駆動されることにより前記磁気テー
プの移送長さを計測するテープ長計測手段と、カセット
内から前記磁気テープを前記テープ長計測手段に当接す
るように引き出すテープ引き出し手段と、前記テープ引
き出し手段で引き出された磁気テープを高速で走行させ
る第一のテープ駆動手段と、前記テープ引き出し手段で
引き出された磁気テープを定速で走行させる第二のテー
プ駆動手段と、前記第一のテープ駆動手段によって前記
磁気テープを高速で終端まで走行させた後、元の位置ま
でまきもどし動作をさせ、前記テープ長計測手段によっ
て終端までのテープ長を計測し、前記テープ長と前記第
二のテープ駆動手段のテープ駆動速度とからテープ残量
時間を計測するテープ残量計測手段とを設けることによ
り、磁気テープの厚みや、リールハブ径や、テープロー
ル径が変化しても全く影響を受けないで常に正確なテー
プ残量を計測できるものである。EFFECTS OF THE INVENTION As described above, according to the present invention, tape length measuring means for measuring the transfer length of the magnetic tape by being brought into contact with the magnetic tape and being rotationally driven by the magnetic tape, and the magnetic tape from inside the cassette. A tape pull-out means for pulling out the tape so as to come into contact with the tape length measuring means; a first tape drive means for running the magnetic tape pulled out by the tape pull-out means at high speed; and a magnetic tape pulled out by the tape pull-out means. The second tape drive means for running at a constant speed and the first tape drive means for running the magnetic tape at a high speed to the end, and then rewinding operation to the original position, and by the tape length measuring means. The tape length to the end is measured, and the remaining tape time is calculated from the tape length and the tape drive speed of the second tape drive means. By providing a tape remaining amount measuring means for measuring, even if the thickness of the magnetic tape, the reel hub diameter, or the tape roll diameter is changed, the tape remaining amount can be measured accurately without being affected at all.
第１図は本発明の一実施例における要部平面図、第２図
は動作フローチャートである。 １……カセット、４……磁気テープ、８……回転ロー
ラ。FIG. 1 is a plan view of an essential part of an embodiment of the present invention, and FIG. 2 is an operation flowchart. 1 ... Cassette, 4 ... Magnetic tape, 8 ... Rotating roller.
Claims (1)
って回転駆動されることにより前記磁気テープの移送長
さを計測するテープ長計測手段と、カセット内から前記
磁気テープを前記テープ長計測手段に当接するように引
き出すテープ引き出し手段と、前記テープ引き出し手段
で引き出された磁気テープを高速で走行させる第一のテ
ープ駆動手段と、前記テープ引き出し手段で引き出され
た磁気テープを定速で走行させる第二のテープ駆動手段
と、前記第一のテープ駆動手段によって前記磁気テープ
を高速で終端まで走行させた後、元の位置までまきもど
し動作をさせ、前記テープ長計測手段によって終端まで
のテープ長を計測し、前記テープ長と前記第二のテープ
駆動手段のテープ駆動速度とからテープ残量時間を計測
するテープ残量計測手段とを具備した磁気記録再生装
置。1. A tape length measuring means for measuring a transfer length of the magnetic tape when the magnetic tape is brought into contact with the magnetic tape and rotationally driven by the magnetic tape, and the magnetic tape is used as the tape length measuring means from inside a cassette. A tape pulling means for pulling the tape out so as to abut, a first tape driving means for running the magnetic tape pulled out by the tape pulling means at a high speed, and a magnetic tape running for pulling the magnetic tape pulled out by the tape pulling means at a constant speed. After the magnetic tape is run to the end at high speed by the second tape drive means and the first tape drive means, the tape is measured to return to the original position, and the tape length to the end is measured by the tape length measuring means. A tape remaining amount meter for measuring and measuring the tape remaining time from the tape length and the tape driving speed of the second tape driving means. Magnetic recording and reproducing apparatus and means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238323A JPH0695435B2 (en) | 1986-10-07 | 1986-10-07 | Magnetic recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238323A JPH0695435B2 (en) | 1986-10-07 | 1986-10-07 | Magnetic recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6391889A JPS6391889A (en) | 1988-04-22 |
| JPH0695435B2 true JPH0695435B2 (en) | 1994-11-24 |
Family
ID=17028503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61238323A Expired - Fee Related JPH0695435B2 (en) | 1986-10-07 | 1986-10-07 | Magnetic recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0695435B2 (en) |
-
1986
- 1986-10-07 JP JP61238323A patent/JPH0695435B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6391889A (en) | 1988-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |