JPH06290507A - Method and device for eliminating slack in tape - Google Patents

Abstract

PURPOSE:To reduce dislocation of a tape by using a position mechanism for instructing a position of a head base, giving rotational force to individual reel bases in the opposite directions to each other respectively in order to eliminate the slack in the tape mounted on the individual reel bases and releasing the rotational force given to the individual reel bases when a play position is effective. CONSTITUTION:The rotational driving force is given to flywheels 3 and 4 in the opposite directions to each other at a constant speed by driving force from a capstan motor, which is not shown in the figure, using a crosswise stretched belt 14. The individual wheels 3 and 4 are forcibly combined with wheel bases 5 and 6 opposite to each other by the position mechanism 11 in a shape of protrusions provided underneath the head base 10 when the head base 10 is retreated to situate in a tape ejecting position by idler means 12 and 13, and then the wheels 3 and 4 are simultaneously rotated in the directions of eliminating the slack in the tape to each other. When the head base is advanced, the mechanism 11 is moved, and the means 12 and 13 are forcibly released from engagement, normal tape rewinding and fast forwarding are performed according to an instruction of tape rewinding and fast forwarding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape deck, and more particularly to a tape slack removing device and method for removing slack of a tape inserted in a deck immediately after mounting a cassette tape or the like.

[0002]

2. Description of the Related Art A conventional tape deck automatically rewinds (REW) immediately after a cassette tape or the like is loaded.
When the tape is rewound for a certain period of time, or the tension of the rewound tape is detected and the rewinding is stopped, the slack of the tape when the tape is inserted is removed. Removing this slack in the tape is also necessary for the tape deck to detect tape breaks.

FIG. 6 diagrammatically shows an example of a tape slack eliminating mechanism in a conventional tape deck. In the figure, a belt 44 for transmitting a driving force of a capstan motor (not shown) is indicated by a capstan shaft 31,3.
Two flywheels 33 and 34, which provide a constant rotation speed around 2, are plowed, whereby the respective flywheels 33 and 34 rotate at a constant speed in opposite directions as indicated by arrows in the figure. Each reel stand 35, 36
A tape take-up reel (not shown) is attached to each. It should be noted that the reel bases 35 and 36 are equipped with a slip mechanism for applying a constant back tension in the direction opposite to the rotation direction in order to keep the tension of the tape constant during running. Recording / playback gears 47, 48 indicated by double lines on the inner circumferences of the flywheels 33, 34.
And the idlers for recording / playback (see idlers 23 and 24 in FIG. 1) that mesh with both gears 51 and 52 shown by double lines on the outer circumferences of the reel stands 35 and 36 are forward play during recording / playback. The rotational force of the flywheels 33 and 34 is applied to the reel stand 3 by selecting reverse play or the like.
Tell either 5, 36.

Further, during tape rewinding (REW) or fast forward (FF), for FF / REW, one of the reel stands 35 and 36 is rotated at a high speed at a speed of, for example, about 3 times that at the time of recording / playback described above. Idler 42 of
It meshes with both the FF / REW gears 49 and 50 indicated by double lines on the outer peripheral portions of the flywheels 33 and 34, and the gears 51 and 52 of the reel stands 35 and 36.
In the figure, the FF / REW idler 42 transmits the rotation of the right flyhole 34 to the reel base 36,
When the idler 42 for FF / REW is on the side indicated by the dotted line in the figure, the rotation of the left flyhole 33 is transmitted to the reel stand 35.

A hatched portion in the drawing shows a head base 40 made of a thin steel plate formed into a predetermined shape, and a tape head 3 for recording / reproducing / erasing a tape therein.
9 is attached. In addition, pinch rollers 37 and 38 for pressing the tape to either one of the capstan shafts 31 and 32 in a forward play or reverse play state are provided with a mechanism that operates in association with the movement of the head base 40. It is mounted on the head base 40.
A protrusion 41 for indicating the position of the head base 40 is provided below the head base 40.
Support pin 4 provided on the pillar of idler 42 for EW
5 controls the operation.

Here, when the cassette tape or the like is inserted into the tape deck, the head deck 40 is in the tape eject state, and therefore the head base 40 is retracted (in the figure, it is located above). In this case, since the protrusion 41 is also present on the upper side of the figure, as shown in the figure, the FF / REW
The support pin 45 provided on the support column of the idler 42 for the forcibly pushed outward (right side in the figure), and as a result, F
The idler 42 for F / REW is the flywheel 34.
The gear 50 is engaged with the gear 52 of the reel stand 36 to rewind the tape deck. Whether the idler 42 for FF / REW is selected in the direction shown by the solid line or the direction shown by the dotted line in the figure is determined by the rewinding direction in the forward play or reverse play state of the tape deck.

Next, when the control circuit inside the tape deck (not shown) detects the insertion of the tape, it instructs the capstan motor to rotate, and the idler 42 for FF / REW is in the direction of the solid line in the figure. The reel stand 36
Is rewound and rotated in the direction of the arrow in the figure to remove the slack of the tape 46. The rewinding operation is completed after a certain time has elapsed from the start of the rewinding or when the operation of the slip mechanism of the opposing reel stand 35 due to the tension of the tape is detected and the rotation of the capstan motor is stopped.

Thereafter, the head base 40 moves forward (moves downward in the figure) when shifting to a play state such as tape recording / playback. In that case, the protrusion 41 of the head base 40
Moves toward the bottom of the figure, so that the support pin 45 provided on the column of the idler 42 for FF / REW is released from the operation restriction by the protrusion 41. in this way,
After removing the slack of the tape, the idler 42 for FF / REW is operated in accordance with a rewinding command or a fast-forwarding command instructed by the control circuit of the tape deck.
Transmits the rotation of each flywheel 33, 34 to one of the corresponding reel stands 35, 36 by a predetermined mechanism.

[0009]

However, in the above-mentioned conventional tape slack removing mechanism, only the tape rewinding operation is automatically performed once when the tape is loaded, and even when it is forcibly rewound for a predetermined time. Therefore, when recording or playing a tape, the tape recording / playback position may deviate greatly from the tape position at the time of tape eject or the desired recording / playback position, and recording / playback that requires highly accurate positioning. There was a problem in the case.

Therefore, the object of the present invention is to solve the above problems.
When the tape is attached, fast rewind is performed at the same time as the conventional rewind,
A tape slack removing device for a tape deck in which the deviation of the tape position during recording and reproduction is reduced as much as possible by simultaneously rotating the two reel stands in opposite directions to remove the slack of the tape. It is intended to provide a method. Further, the object of the present invention is to achieve the above-mentioned object only by adding a simple mechanism to the conventional tape slack removing mechanism, whereby the tape slack removing device can be easily incorporated into the conventional tape deck. Is intended to be provided.

[0011]

According to the present invention, as shown in FIG. 1, a capstan shaft 1, driven by a motor,
Flywheels 3 and 4 that rotate in opposite directions to keep the tape running speed constant around 2, reel stands 5 and 6 for mounting take-up reels, tape recording / playback,
1. A tape running mechanism including a head base 10 on which a tape head 9 for erasing is mounted, and a position mechanism 11 for indicating the position of the head base 10 at the tape eject position immediately after mounting the tape, by means of the flywheels 3, 3. The rotation force of 4 corresponds to each of the reel stands 5,
6 are simultaneously transmitted as rotational forces in opposite directions to remove the slack of the loaded tape, and by the position mechanism 11 in the play position, the reel stands 5, 6
There is provided a tape slack eliminating device having idler means 12 and 13 for canceling simultaneous transmission of rotational force applied to the tape.

[0012]

A driving force from a capstan motor (not shown) causes the flywheels 3 and 4 to rotate at a constant speed in the opposite direction via the belt 14 plowed. The idler means 12 and 13 are formed in a convex shape in the figure provided at the bottom of the head stand 10 when the tape eject position, that is, when the head stand 10 (shown by diagonal lines in the figure) is retracted (positioned to the left in the figure). The position mechanism 11 forcibly engages the flywheels 3, 4 and their corresponding reel stands 5, 6 and simultaneously rotates the reel stands 5, 6 in opposite directions to remove tape slack.

When the head base 10 moves forward (moves to the right in the figure), the convex position mechanism 11 also moves accordingly, and the forced engagement of the idler means 12, 13 is released. After this, a predetermined control mechanism follows the instructions of tape rewind (REW) and fast forward (FF).
Only one of the idler means 12, 13 corresponds to each flywheel 3, 4 and each reel stand 5,
Normal tape rewinding operation (R
EW) or fast-forward operation (FF).

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing an embodiment of the present invention. Each of the constituent elements 1 to 11 and 14 of FIG.
Are 31 to 41 and 4 of the conventional example (FIG. 6) described above.
4 respectively, which will not be described again here. In the figure, the idler means 12,
13 is an idler 4 for FF / REW of the conventional example (Fig. 6).
Two idlers are used, and an idler for FF and an idler for REW, which are determined by the forward play and reverse play states, respectively, are individually used, and they are moved toward the center by a spring mechanism (not shown). I have been drawn. For the sake of simplicity, the left idler 12 will be described as a fast-forward idler (FF idler), and the right idler 13 will be described as a rewind idler (REW idler).

When the head base 10 is retracted as described above, the convex-shaped position mechanism 11 is located on the left side in the drawing, and the shape edge portion of the convex position mechanism 11 is placed on the respective columns of the FF idler 12 and the REW idler 13. Support pin 1 provided
5 and 16 are spread apart against the spring mechanism. As a result, the FF idler 12 and the REW idler 13 are engaged with the corresponding flywheels 3, 4 and the reel stands 5, 6 and the rotational force from the flywheels 3, 4 is transmitted to the reel stands 5, 6. . Therefore, the reel base 5 rotates in the fast-forward direction and the reel base 6 rotates in the rewinding direction to remove the slack of the tape.

2 to 5 show the above-mentioned convex position mechanism 11 of the head base 10 of FIG. 1, the FF idler 12 and the REW idler 1 after removing the slack of the tape.
3 schematically shows the relationship with the mechanism of the slide lever 17 for controlling the operation of No. 3 in FIG. 2 to 5, the slide lever 17 is shaded in order to clarify the operation of the slide lever 17, and the same parts as those in FIG. 1 are designated by the same reference numerals. .

FIG. 2 shows the head base 10 of FIG. 1 described above.
2 is a diagram schematically showing an example in which the slide lever 17 not shown in FIG. 1 is added to the tape slack removing mechanism at the time of retreating. Slide lever 1
In this example, 7 has a shape indicated by diagonal lines in the figure. As will be described later with reference to FIGS. 3 to 5, the slack of the tape is removed according to the present invention, and the shape is used for the FF. The operations of the idler 12 and the REW idler 13 are controlled. However, in the state of FIG.
Since the support pins 15 and 16 provided on the columns of the F idler 12 and the REW idler 13 are forcibly expanded, the slide lever 17 is moved to the F direction.
It does not participate in the operations of the F idler 12 and the REW idler 13.

FIG. 3 is a schematic diagram showing a case where the head base 10 is moved forward and the tape is rewound (REW) by the slide lever 17 after the slack of the tape is removed according to the present invention. The forward movement of the head base 10 causes the convex-shaped position mechanism 11 to move downward, whereby the FF idler 12 due to its edge portion shown in FIG.
The pressing of the REW idler 13 against the support pins 15 and 16 is released. At this time, FF idler 12 and REW
Since the work idler 13 is pulled toward the center side by the above-mentioned spring mechanism, the operation control thereof is shifted from the control by the edge portion of the position mechanism 11 to the control by the shape of the slide lever 17. In the example of FIG. 3, the support pin 1 of the FF idler 12 is moved by the movement of the slide lever 17.
5 is located in the recess 18 of the slide lever 17, and the support pin 16 of the REW idler 13 is located in the projection 19 of the slide lever 17, so that only the REW idler 13 is effective and the flywheel 4 The tape rewinding operation is performed by using the reel base 6.

FIG. 4 is a diagrammatic drawing of the case where the tape is fast forwarded (FF) by the slide lever 17 in the state where the head base 10 is advanced as in FIG. In the figure, by moving the slide lever 17, F
The support pin 15 of the idler 12 for F is the slide lever 17.
The support pin 16 of the REW idler 13 is located in the recess 21 of the slide lever 17, so that only the FF idler 12 is effective and the flywheel 3 and the reel stand 5 are Use to fast forward the tape.

Furthermore, FIG. 5 is similar to FIG.
2 schematically illustrates a play state by the slide lever 17 in a state in which is moved forward. In the figure, the FF idler 1 is moved by moving the slide lever 17.
2 support pin 15 in the recess 22 of the slide lever 17,
Then, the support pin 16 of the REW idler 13 is arranged in the recess 21 of the slide lever 17, and as a result, both the FF idler 12 and the REW idler 13 become invalid. In this case, for example, one of the idlers 23 and 24 for recording / playback shown in FIG. 1 is engaged with one of the corresponding flywheels 3 and 4 and the reel stands 5 and 6 for normal forward play or Performs recording or playback operation in reverse play.

[0021]

As described above, according to the present invention, when the slack of the tape is removed when the tape is mounted, the reel bases simultaneously rotate in the opposite directions at the same speed, so that the tape position during recording and reproduction can be changed. The shift can be reduced as much as possible. In addition, according to the present invention, by adding a simple mechanism to the conventional tape slack removing mechanism, it is possible to remarkably reduce the positional deviation, and therefore the present invention can be easily incorporated into a conventional tape deck. As a result, the performance can be improved without changing the product cost and size of the tape deck.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an embodiment of a tape sag removing device according to the present invention.

FIG. 2 schematically shows an example in which a slide lever is added to FIG.

FIG. 3 is a diagram schematically showing an example of tape rewinding by a slide lever.

FIG. 4 is a diagram schematically showing an example of fast-forwarding a tape by a slide lever.

FIG. 5 is a diagram schematically showing an example of a play state by a slide lever.

FIG. 6 is a diagram schematically showing an example of a tape slack removing mechanism in a conventional tape deck.

[Explanation of symbols]

 1, 2 ... Capstan shaft 3, 4 ... Flywheel 5, 6 ... Reel stand 7, 8 ... Pinch roller 9 ... Tape head 10 ... Head stand 11 ... Positioning mechanism 12, 13 ... Idler means 14 ... Belt 17 ... Slide lever 23, 24 ... Idler

Claims (2)

[Claims] 1. Flywheels (3, 4) driven by a motor and rotating in opposite directions around a capstan shaft (1, 2) to keep the tape running speed constant.
A tape running mechanism comprising a reel stand (5, 6) for mounting a take-up reel, and a head stand (10) equipped with a tape head (9) for recording / reproducing / erasing a tape. Position mechanism (11) for indicating the position of the head base (10) at the tape eject position immediately after.
Simultaneously transmitting the rotational force of each of the flywheels (3, 4) to the respective corresponding reel bases (5, 6) as rotational forces in opposite directions to remove the slack of the loaded tape, and A tape slack removing device comprising idler means (12, 13) for canceling simultaneous transmission of a rotational force given to each reel stand (5, 6) by the position mechanism (11) in a play position. 2. A first step of detecting mounting of a tape in a tape ejecting state, a second step of simultaneously rotating two reel stands on which the tape is mounted by the detection in mutually opposite directions for removing slack of the tape. A tape slack removal method comprising: a step; and a third step of stopping the rotation when the tension of the tape reaches a predetermined value.