JPH021700Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette type recording and reproducing device, and more specifically, in a device having an auto-shut-off mechanism, it is possible to prevent the auto-shut-off operation from occurring accidentally in the review mode or cue mode. related to the equipment used.

The gist of the present invention is a center gear on a fixed base plate that rotates in response to the rotational torque of a motor, a take-up reel stand on a take-up gear arranged with the center gear inside, and a rewind gear on a rewind gear. It has a reel table rotation mechanism consisting of a rewind reel table and an intermediate gear for transmitting the rotation of the center gear to the take-up gear; a movable substrate that slides back and forth on the fixed substrate; Composed of a head and a friction roller, by pressing the regeneration button, the friction roller is brought into contact with the shaft of the center gear and the take-up reel stand, and at the same time, the restriction of the pinch roller arm is released and the pinch roller is tilted. The roller is connected to the capstan shaft, and conversely, when a stop button is pressed, the friction roller is separated from the center gear shaft and take-up reel stand, and the pinch roller arm is separated from the capstan shaft. Has; a connecting means for moving the center gear to the rewinding gear or the intermediate gear side of the winding side gear by pressing the rewind button or the fast forward button; Slide and
In a cassette type recording and reproducing device having a rewinding and fast forwarding mechanism consisting of a sliding plate for slightly retracting the movable substrate, a slip lever having a slip means pivotally supported on the shaft of the take-up reel stand; A shutter-off lever that tilts together with the slit lever and slides up and down independently of the slit lever, a guide cam that cam-guides the pin on the end of the above-mentioned shutter-off lever, and a stopper for retracting the shutter-off lever. A camshaft driven by a motor having a camshaft and a pin of the above-mentioned shaft-off lever are biased toward the guide cam side, and during playback, rewinding, and fast forwarding, the bias is released and the stopper of the camshaft allows the shaft-off lever to retreat. It has a shut-off mechanism consisting of a spring that enables the slip-off mechanism; it is pivotally supported by a support body that supports the spring, which is disposed opposite to one end of the slip lever, and a sliding plate that slides during rewinding or fast-forwarding operations. A shut-off prevention mechanism is provided, which comprises an interlocking lever that is located at a position where it abuts the support body according to the movement of the pinch roller arm only during playback operation, and presses the spring support body during review mode or cue mode. This is a cassette type recording and reproducing device whose purpose is to:
It is an object of the present invention to provide a means for preventing malfunction of shut-off in review mode or queue mode.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a center gear on a fixed board that rotates in response to rotational torque of a motor; 2 and 3 are winding gears and unwinding gears arranged with center gear 1 in the center; 4 and 5 are winding gears 2 and winding gears. The take-up reel stand and the unwind reel stand 6 on the return gear 3 are intermediate gears for transmitting the rotation of the center gear 1 to the take-up gear 2, and the above shows only the rotation mechanism.

Next, 7 is a movable board that slides on the fixed board, and a head 8 and a friction roller 9 are attached to it.

The movement of the movable substrate 7 is linked to the pinch roller arm 11 that pivotally supports the pinch roller 10. When the playback button 12 is pressed and the movable substrate 7 is moved to the playback position, the pinch roller arm 11 is moved. When the regulation is lifted, the pinch roller 10 becomes the capstan shaft 1.
2', and conversely, when the stop button 13 is pressed to move the movable board 7 to the stop position, the pinch roller arm 11 is moved backward and the pinch roller 10 is separated from the capstan shaft 12'. It is something. The above shows the parts related to playback and stop operations.

Next, 14 is a rewind button, and 15 is a fast forward button, and when the rewind button 14 or the fast forward button 15 is pressed, the center gear 1 meshes with the rewind gear 3 or the intermediate gear 6 by a connecting means (not shown). At the same time, the sliding plate 16 is retracted via a connecting means (not shown), and the retracting of the sliding plate 16 causes the movable base plate 7 to move slightly away from the operating position through the movement of the interlocking lever 17. . The above is a rewind and fast forward mechanism.

The present invention is a cassette type recording/reproducing apparatus comprising the above-mentioned mechanisms, and is provided with the following mechanisms.

That is, a slip lever 18 having a slip means is pivotally supported on the shaft of the take-up reel stand 4, and projections 19a and 19 provided on the back surface of the slip lever 18 are provided.
A shutter-off lever 20 is arranged between
1. As a result, although the shutter-off lever 20 tilts together with the slip lever 18, it also moves back and forth (left and right in the figure) independently of the slip lever 18.

The pin 22 of the above-mentioned shaft-off lever 20 is guided by a guide cam 24 of a camshaft 23 driven by a motor, and when stopped,
The spring 26 supported by the support 25 is always biased toward the cam 24, but during playback, rewinding, or fast forwarding, the support 25 is moved upward by an interlocking means (not shown). (Moves to the left in the figure) Since the spring 26 separates from the pin 22 of the shutter-off lever 20, the stopper 27 of the camshaft 23 allows the shutter-off lever 20 to move backward (moves to the right in the figure). That is, reproduction,
During rewinding or fast-forwarding, when the tape runs to the end, the slip lever 18 is tilted by the slip means in the opposite direction to the running direction of the tape, and the shaft-off lever 20 is tilted to a position where it contacts the stopper 27 of the camshaft 23. As a result of the rotation, the shut-off lever 20 is pressed through the stopper 27. The above shows the shut-off mechanism.

Next, 28 is a spring 3 arranged so as to face one end 29 of the slip lever 18.
It is a support body that supports the spring 30 at one end 2 only in the review mode or queue mode.
Move to a position that will assist the 9th side. That is, 3
1 is pivotally supported by a sliding plate 16 that slides when a rewind button 14 or a fast forward button 15 is pressed, and is normally biased counterclockwise in the figure by a spring 32. It is an interlocking pin that displaces clockwise in accordance with the movement of the pinch roller arm 11 which is displaced in the playback state, and is located at a position where it is pushed by the pinch roller arm 11 and comes into contact with the support 28 in the playback state, Then, the rewinding or fast forwarding operation is performed while maintaining the reproducing operation.The sliding plate 1
6 is slid, it presses the support 28 and brings the spring 30 into contact with one end 29 of the slip lever 18, causing the slip lever 18 to press against the spring 3.
As a result of being biased in the counterclockwise direction by
4, and there is no malfunction of the shut-off in queue mode or review mode. The above is a mechanism for preventing malfunction of the shut-off.

Next, a series of operations will be explained.

FIG. 1 shows the state at a stop, FIG. 2 shows the playback operation, FIG. 3 shows the rewind operation during shut-off, and FIG. 4 shows the review operation.

First, the playback operation will be explained.

Press the play button 12. Then, the movable base plate 7 moves to the left as shown in FIG. 1 to FIG. 2, the friction roller 9 comes into contact with the shaft of the center gear 1 and the take-up reel holder, and the tape is wound onto the take-up reel side. . Then, the tape is held between the capstan shaft 12' and the pinch roller 10, and the head 8 is brought into contact with the tape.
will be played. At this time, as the movable substrate 7 moves to the left, the pinch roller arm 11 is rotated clockwise by the spring. Along with this, pinch roller arm 1
1, the interlocking lever 31 tilts slightly clockwise against the spring 32 and comes to face the spring support 28. However, at this time, the sliding plate 16 remains as it was, and the interlocking lever 31 has not moved to the left, so the spring support 28 does not move to the left, and the spring 30 causes the slip lever 1 to move to the left.
It does not hit the edge 29 of 8. Therefore, when the tape reaches its end during the playback operation, the slip lever 18 rotates in the opposite direction to the tape winding direction, that is, in the clockwise direction, due to the slip of the slip means. lever 20
also rotates clockwise to release the shutter-off lever 20.
The pin 22 is the stopper 27 of the camshaft 23.
The rotation of the camshaft 23 presses the stopper 27, and the shutter-off lever 20 is pushed and moved to the right in the figure, operating the unlocking means (not shown) and pressing the playback button 12.
to end the playback operation.

Next, the rewinding operation will be explained.

Press the rewind button 14. Then, the center gear 1 moves via an interlocking means (not shown), and the center gear 1 meshes with the rewind gear 3. As a result, the tape is rewound. At this time, sliding plate 1
6 moves to the left as shown in FIG. 3, and the interlocking lever 31 moves to the left.
8, so the spring support 28
is not pressed, and as in the previous playback operation state, when the tape reaches the end, the shut-off operation is performed in the same manner as described above. This also applies to fast-forwarding operations.

Next, a review operation in which a rewind operation is performed while maintaining a playback operation will be explained.

The playback operation is the same as described above. When the rewind button 14 is pressed during this playback operation, the sliding plate 16 moves to the left, causing the movable board 7 to move slightly backward through the movement of the interlocking lever 17 (moves to the right in the figure).
let Therefore, the pinch roller 10 separates from the capstan shaft 12', and the friction roller 9 separates from the capstan shaft 12'. Then, the center gear 1 meshes with the rewind gear 3. As a result, rewinding is performed while the reproducing operation is maintained, and when the rewind button is stopped being pressed, the rewinding operation is immediately switched to the reproducing operation. By the way,
The previous movement of the sliding plate 16 to the left caused the interlocking pin 31 to move to the left, and at this time the interlocking lever 31 remained in the regenerating state and was facing the spring support 28, so as shown in FIG. The spring support 28 is pressed, and the leftward movement of the support 28 causes the spring 30 to forcibly bias the end 29 of the slip lever 18. Therefore, the slip lever 18 and the shutter-off lever 20 are tilted counterclockwise, and the shutter-off lever 20 is tilted counterclockwise.
The pin 22 is the guide cam 24 of the camshaft 23.
This means that this is always the case.

Therefore, even when the tape reaches its end, the stopper 27 of the camshaft 23 will not hit the pin 22 of the shutter-off lever 20.
This ensures that a shut-off operation will never occur accidentally. This is the same in the case of a queue operation in which the playback operation state is maintained and the playback operation is switched to the fast-forward operation, and the playback operation is returned immediately after the fast-forward operation is completed.

As described in detail above, the present invention displaces the spring support 28 to bias the spring 30 against the one end 29 of the slip lever 18 when rewinding or fast forwarding is performed while maintaining the reproducing operation state. , the shaft-off lever 20, which tilts together with the slip lever 18, is moved to one side so that its pin 22 always remains in contact with the cam 24 of the camshaft 23, and even when the tape reaches its end, the shaft-off lever 20 is kept on the shaft. 23 so that it does not move to the position where it hits the stopper 27, thereby preventing an erroneous shut-off operation.

As described above, the present invention can provide a mechanism for preventing a shut-off operation in review mode and queue mode with a simple mechanism.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a plan view when stopped, Fig. 2 is a plan view of the main part during playback operation, and Fig. 3 is a plan view during rewinding operation and in the middle of shut-off operation. FIG. 4 is a plan view of the main part during review operation.

Claims (1)

[Scope of utility model registration request] A center gear 1 on a fixed base plate that rotates in response to rotational torque of a motor, and a take-up reel stand 4 on a take-up gear 2 arranged with the center gear 1 inside.
It has a reel stand rotation mechanism consisting of a rewind reel stand 5 on the rewind gear 3, and an intermediate gear 6 for transmitting the rotation of the center gear 1 to the take-up gear 2;
a movable substrate 7 that slides back and forth on the fixed substrate;
It consists of a head 8 on a movable base plate 7 and a friction roller 9. When the regeneration button 12 is pressed, the friction roller 9 is brought into contact with the shaft of the center gear 1 and the take-up reel stand, and the pinch roller arm 11
release the restriction and tilt the pinch roller 10,
The pinch roller 10 is connected to the capstan shaft 12', and conversely, by pressing the stop button 13, the friction roller 9 is separated from the shaft of the center gear 1 and the take-up reel stand, and the pinch roller arm 11 is connected to the capstan shaft. 12'; a connection that moves the center gear 1 to the rewind gear 3 or the intermediate gear 6 side of the winding side gear 2 by pressing the rewind button 14 or the fast forward button 15. A cassette type recording and reproducing device having a rewinding and fast forwarding mechanism consisting of a means and a sliding plate 16 for slightly retracting the movable substrate 7 by sliding when a rewind button or a fast forward button is pressed. A slip lever 18 having a slip means pivotally supported on the shaft of the take-up reel stand 4; and a shutter-off lever 20 that tilts together with the slip lever 18 and slides up and down independently of the slip lever 18. , a guide cam 24 that cam-guides the pin 22 on the end of the above-mentioned shutter-off lever 20, and the shutter-off lever 2.
A camshaft 23 driven by a motor having a stopper 27 for retracting the camshaft 23 and the pin 22 of the above-mentioned shutter-off lever 20 are biased toward the guide cam 24, and the bias is applied during playback, rewinding, and fast forwarding. It has a shutter-off mechanism consisting of a spring 26 that releases the slip lever 20 and allows the stopper 27 of the camshaft 23 to move the shutter-off lever 20 backward; It is pivotally supported by the body 28 and a sliding plate 16 that slides during rewinding or fast forwarding operations, and is located at a position where it comes into contact with the support 28 according to the movement of the pinch roller arm 11 only during playback operations, and is in a review mode. Or when in queue mode, use the spring support 2 above.
A cassette type recording/reproducing device equipped with a shut-off prevention mechanism consisting of an interlocking lever 31 that presses a shutter.