JPH0210496B2 - - Google Patents
Info
- Publication number
- JPH0210496B2 JPH0210496B2 JP56165455A JP16545581A JPH0210496B2 JP H0210496 B2 JPH0210496 B2 JP H0210496B2 JP 56165455 A JP56165455 A JP 56165455A JP 16545581 A JP16545581 A JP 16545581A JP H0210496 B2 JPH0210496 B2 JP H0210496B2
- Authority
- JP
- Japan
- Prior art keywords
- groove
- detection
- reel shaft
- cam
- tape
- 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
- 238000001514 detection method Methods 0.000 claims description 44
- 238000010586 diagram Methods 0.000 description 6
- 230000007257 malfunction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
- G11B15/093—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing driving condition of record carrier, e.g. travel, tape tension
Description
【発明の詳細な説明】
本発明はリール軸の回転停止を機械的に検出す
ることにより、テープ終端を検出するテープ終端
検出装置を具備し、テープ終端の検出で停止状態
に自動的に復帰するよう構成した磁気録音再生装
置に関し、特にテープ終端検出装置の誤動作を防
止したことを特徴とする磁気録音再生装置に関す
る。Detailed Description of the Invention The present invention is equipped with a tape end detection device that detects the end of the tape by mechanically detecting the stoppage of rotation of the reel shaft, and automatically returns to the stopped state upon detection of the end of the tape. The present invention relates to a magnetic recording/reproducing apparatus configured as described above, and particularly to a magnetic recording/reproducing apparatus characterized in that a tape end detection device is prevented from malfunctioning.
リール軸の回転停止を機械的に検出することに
より、テープ終端を検出するテープ終端検出装置
は、一般に第１図に示すように構成されている。 A tape end detection device that detects the end of a tape by mechanically detecting the stoppage of rotation of a reel shaft is generally constructed as shown in FIG.
即ち１は巻取りリール軸２に回動自在に枢着さ
れ、巻取りリール軸２の回転方向に偏移される検
知レバーで、先端に矢形溝３が形成されている。 That is, reference numeral 1 denotes a detection lever that is rotatably mounted on the take-up reel shaft 2 and is displaced in the rotational direction of the take-up reel shaft 2, and has an arrow-shaped groove 3 formed at its tip.
４は図示せぬモーターにより駆動されているカ
ムギアで、第２図に示すようにカム５，６が形成
されカム溝Ａ，Ｂ，Ｃが形成されている。７は解
除レバーで中央でシヤーシ軸８に枢支され、スプ
リング９により反時計方向に付勢されると共に、
第３図に示すように一端の上下に植設した突ピン
１０，１１を、前記検知レバー１の矢形溝３とカ
ム溝に係合し、他端は操作レバーを鎖錠する鎖錠
板１２と係合する位置に臨んでいる。 A cam gear 4 is driven by a motor (not shown), and as shown in FIG. 2, cams 5 and 6 are formed and cam grooves A, B, and C are formed. Reference numeral 7 denotes a release lever which is pivotally supported at the center by a chassis shaft 8 and biased counterclockwise by a spring 9.
As shown in FIG. 3, projecting pins 10 and 11 installed above and below one end are engaged with the arrow-shaped groove 3 and cam groove of the detection lever 1, and the other end is a locking plate 12 for locking the operating lever. It is facing the position where it engages with.
したがつて巻取リール軸２が回転されテープが
走行されている場合、検知レバー１は巻取リール
軸２の反時計方向の回転力を受け、反時計方向に
偏移されることにより、カムギア４の回転で解除
レバー７の上方の突ピン１０は、検知レバー１の
矢形溝３を斜辺に沿つて往復移動されることによ
り、下方の突出ピン１１はカムギア４のカム溝を
第４、第５図に示すようにＡ−Ｂ−Ａの経路で移
動される。 Therefore, when the take-up reel shaft 2 is rotated and the tape is running, the detection lever 1 receives the counterclockwise rotational force of the take-up reel shaft 2, and is shifted counterclockwise, thereby causing the detection lever 1 to act on the cam gear. 4, the upper protruding pin 10 of the release lever 7 is reciprocated along the oblique side of the arrow-shaped groove 3 of the detection lever 1, and the lower protruding pin 11 moves the cam groove of the cam gear 4 into the fourth and fourth cam grooves. As shown in Figure 5, it is moved along the route A-B-A.
したがつて解除レバー７の他端は、第４図及び
第５図に示すように第位置と第位置を往復移
動され、鎖錠板１２とは係合されない。 Therefore, the other end of the release lever 7 is moved back and forth between the first and second positions as shown in FIGS. 4 and 5, and is not engaged with the locking plate 12.
ところがテープ終端になり巻取リール軸２の回
転が停止されると、第６図に示すように検知レバ
ー１への回転力が付与されなくなり、解除レバー
７の上方の突ピン１０は検知レバー１の矢形溝３
の長溝に進入され、且つ下方の突ピン１１がカム
ギア４のカム溝Ｃに進入されることにより、解除
レバー７は反時計方向に大きく第位置まで回動
され、解除レバー７が鎖錠板１２と係合され鎖錠
板１２を右方向に移動させることにより、操作レ
バーの鎖錠が解除され停止状態に移行される。 However, when the tape reaches the end and the rotation of the take-up reel shaft 2 is stopped, the rotational force is no longer applied to the detection lever 1 as shown in FIG. arrow shaped groove 3
The release lever 7 is rotated largely counterclockwise to the first position by entering the long groove C of the cam gear 4 and the lower projecting pin 11 entering the cam groove C of the cam gear 4. By engaging with the lock plate 12 and moving the lock plate 12 to the right, the control lever is unlocked and shifted to the stopped state.
この様にしてテープ終端が検出され停止状態に
復帰されるが、動作モードによつてはテープ終端
でないにも拘らずテープ終端検出装置が誤動作し
停止状態に復帰してしまうという欠点があつた。 In this way, the end of the tape is detected and the tape is returned to the stopped state. However, depending on the operating mode, the tape end detection device may malfunction even though the tape is not at the end, and the tape may be returned to the stopped state.
即ちプレイモードからレビユーモードへあるい
は逆にレビユーモードからプレイモードに切換え
た場合、検知レバー１は巻取リール軸２の逆転に
伴ない偏移方向が第１図に示すＸ−Ｙの矢印方向
に切換えられるが、この時解除レバー７の上方の
突ピン１０が左方向に移動中であり、且つ検知レ
バー１の矢形溝３の長溝と対向した場合、突ピン
１０が矢形溝３の長溝内に進入され前述のように
停止状態に復帰させるものである。この状態は必
ず発生するものではないが、タイミングによつて
は発生しレビユー操作したつもりが停止状態にな
る等問題となつていた。 That is, when switching from play mode to review mode or vice versa, the detection lever 1 is shifted in the direction of the X-Y arrow shown in FIG. 1 as the take-up reel shaft 2 is reversed. However, at this time, if the protrusion pin 10 above the release lever 7 is moving to the left and faces the long groove of the arrow-shaped groove 3 of the detection lever 1, the protrusion pin 10 will be in the long groove of the arrow-shaped groove 3. The vehicle enters the vehicle and returns to the stopped state as described above. Although this state does not always occur, it does occur depending on the timing and has become a problem, such as when the review operation is intended to be in a stopped state.
従つて本発明はこの点に鑑みなされたもので、
検知レバーを二枚構成とすることにより、テープ
終端検出装置の誤動作を防止した磁気録音再生装
置を提供するものである。 Therefore, the present invention has been made in view of this point.
The present invention provides a magnetic recording/reproduction device in which malfunction of a tape end detection device is prevented by having a two-piece detection lever.
以下本発明の実施例を図面と共に説明する。第
７図が本発明により改良された検知レバーを示す
図で、二枚の検知レバー１３，１４で構成され、
互いに異なる位置に一ケ所のみ形成された係合溝
１３′，１４′と、長溝１３″，１４″が形成されて
おり、二枚を重ね合わせて第８図に示すようにリ
ール軸２に装着した時、長溝１３″，１４″と係合
溝１３′，１４′が線対称の関係を有する検出溝１
５を構成している。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 is a diagram showing a detection lever improved according to the present invention, which is composed of two detection levers 13 and 14,
Engagement grooves 13', 14' and long grooves 13'', 14'' are formed at different positions from each other, and the two are overlapped and attached to the reel shaft 2 as shown in Fig. 8. When the long grooves 13'', 14'' and the engagement grooves 13', 14' have a line-symmetrical relationship, the detection groove 1
5.
次に斯る構成よりなる本発明の動作につき説明
する。 Next, the operation of the present invention having such a configuration will be explained.
先ずリール軸２が反時計方向に回転されている
場合、検知レバー１３，１４は同方向に回転され
るが、下方の検知レバー１４は検出溝の一辺が突
ピン１０に当接し回動を規制されることにより、
第９図に示す状態となり突ピン１０は検知レバー
１３の係合溝１３′に係合される。一方リール軸
２が時計方向に回転されている場合には、第１０
図に示すように上方の検知レバー１３が回動規制
され下方の検知レバー１４の係合溝１４′に突ピ
ン１０が係合される。 First, when the reel shaft 2 is rotated counterclockwise, the detection levers 13 and 14 are rotated in the same direction, but one side of the detection groove of the lower detection lever 14 comes into contact with the protrusion pin 10 to restrict rotation. By being
The state shown in FIG. 9 is reached, and the projecting pin 10 is engaged with the engagement groove 13' of the detection lever 13. On the other hand, when the reel shaft 2 is rotated clockwise, the 10th
As shown in the figure, the rotation of the upper detection lever 13 is restricted, and the projecting pin 10 is engaged with the engagement groove 14' of the lower detection lever 14.
このようにしてテープが走行中でリール軸２が
回転されている間は、突ピン１０が係合溝１３′
あるいは１４′に係合されているけれども、テー
プ終端になりリール軸２の回転が停止すると、検
知レバー１３，１４への回転力が消失され検知レ
バー１３，１４が、第８図に示すように一致され
突ピン１０が長溝１３″，１４″内に進入されるこ
とにより前述と同様にして停止状態に復帰させる
ことができる。 In this way, while the tape is running and the reel shaft 2 is being rotated, the projecting pin 10 is in the engagement groove 13'.
14', but when the end of the tape is reached and the rotation of the reel shaft 2 stops, the rotational force to the detection levers 13 and 14 is lost and the detection levers 13 and 14 move as shown in FIG. When the projecting pins 10 are aligned and entered into the long grooves 13'' and 14'', it is possible to return to the stopped state in the same manner as described above.
次にプレイモードからレビユーモードへの切換
えあるいはレビユーモードからプレイモードに切
換えた時、リール軸２の回転が逆転されると同時
に検知レバー１３，１４が第９図と第１０図に示
す状態に切換えられるが、この時検知レバー１
３，１４は第９図、第１０図に示すように長溝１
３″，１４″への入口を塞いだ状態で移動される
為、検知レバー１３，１４の移動中に突ピン１０
が長溝１３″，１４″内に進入され停止状態に復帰
するのが完全に防止される。 Next, when switching from play mode to review mode or from review mode to play mode, the rotation of the reel shaft 2 is reversed and at the same time the detection levers 13 and 14 are switched to the states shown in FIGS. 9 and 10. However, at this time, the detection lever 1
3 and 14 are the long grooves 1 as shown in Figures 9 and 10.
Since the detection levers 13 and 14 are moved with the entrances to them blocked, the protrusion pin 10
is completely prevented from entering the long grooves 13'', 14'' and returning to the stopped state.
上述の如く本発明の磁気録音再生装置は、テー
プ終端を検出する検知レバーを二枚構成にし、検
出溝の構成を互いに異ならせることにより、リー
ル軸の逆転時に検出溝の長溝への入口を塞ぐよう
構成し、テープ終端以外で停止状態に復帰する誤
動作を完全に防止したもので、極めて実用的効果
大なるものである。 As described above, the magnetic recording/playback device of the present invention has two detection levers for detecting the end of the tape, and the detection grooves have different configurations, so that when the reel shaft is reversed, the entrance of the detection groove to the long groove is blocked. This structure completely prevents the malfunction of returning to the stopped state at a point other than the end of the tape, and has an extremely large practical effect.
第１図は磁気録音再生装置の従来例を示す図、
第２図は第１図要部の構成を示す図、第３図は第
１図要部の断面図、第４図、第５図、第６図は第
１図の動作状態を示す図、第７図は本発明による
テープ終端検出装置の検知レバーを示す図、第８
図は本発明によるテープ終端検出装置を示す図、
第９図、第１０図は第８図の動作状態を示す図で
ある。
２……リール軸、４……カムギア、７……解除
レバー、１２……鎖錠板、１３，１４……検知レ
バー、１５……検出溝。
FIG. 1 is a diagram showing a conventional example of a magnetic recording and reproducing device.
FIG. 2 is a diagram showing the configuration of the main part in FIG. 1, FIG. 3 is a sectional view of the main part in FIG. 1, and FIGS. 4, 5, and 6 are diagrams showing the operating state of FIG. 1. FIG. 7 is a diagram showing the detection lever of the tape end detection device according to the present invention;
The figure shows a tape end detection device according to the present invention;
9 and 10 are diagrams showing the operating state of FIG. 8. 2...Reel shaft, 4...Cam gear, 7...Release lever, 12...Lock plate, 13, 14...Detection lever, 15...Detection groove.
Claims (1)
転方向に偏移される二枚の検知レバーと、 一方の検知レバーの先端に、長溝と係合溝によ
つてト状に形成された溝と、 他方の検知レバーの先端に、前記溝と線対称の
関係で長溝と係合溝によつて逆ト状に形成された
溝と、 モーターによつて回転され、カム溝が形成され
たカムギアと、 前記二枚の検知レバーの各溝及び前記カムギア
のカム溝に挿入する突ピンが設けられた解除レバ
ーとを備え、 リール軸の回転中は、二枚の検知レバーの位置
に相対的なズレが生じて前記解除レバーの突ピン
がいずれかの検知レバーの係合溝に係合し、又、
リール軸の回転が停止した時、二枚の検知レバー
の位置が一致して前記解除レバーの突ピンが各長
溝内を進入しテープ終端を検出するように構成し
たことを特徴とする磁気録音再生装置。[Scope of Claims] 1. Two detection levers that are mounted on top of each other on a reel shaft and are shifted in the rotational direction of the reel shaft, and a trigger provided at the tip of one of the detection levers by a long groove and an engagement groove. a groove formed in the shape of a cam; a groove formed in the tip of the other detection lever in an inverted shape by a long groove and an engagement groove in line symmetry with the groove; and a cam rotated by a motor. A cam gear in which a groove is formed, and a release lever provided with a projecting pin that is inserted into each groove of the two detection levers and the cam groove of the cam gear, and when the reel shaft is rotating, the two detection levers A relative shift occurs in the position of the release lever, and the projecting pin of the release lever engages with the engagement groove of one of the detection levers, and
The magnetic recording and playback device is characterized in that when the rotation of the reel shaft stops, the positions of the two detection levers coincide and the protruding pins of the release lever move into the respective long grooves to detect the end of the tape. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56165455A JPS5868257A (en) | 1981-10-15 | 1981-10-15 | Magnetic sound recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56165455A JPS5868257A (en) | 1981-10-15 | 1981-10-15 | Magnetic sound recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5868257A JPS5868257A (en) | 1983-04-23 |
| JPH0210496B2 true JPH0210496B2 (en) | 1990-03-08 |
Family
ID=15812739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56165455A Granted JPS5868257A (en) | 1981-10-15 | 1981-10-15 | Magnetic sound recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5868257A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6378358A (en) * | 1986-09-20 | 1988-04-08 | Tanashin Denki Co | Actuation device |
-
1981
- 1981-10-15 JP JP56165455A patent/JPS5868257A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5868257A (en) | 1983-04-23 |
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