JPS6019063B2 - Cartridge tape recording/playback device stop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording and reproducing device for an endless magnetic tape housed in a cartridge, that is, a cartridge tape. The purpose is to

In conventional devices of this kind, the tape is brought to a stop state simply by turning off the power to the drive motor, so the tape runs several times after the stop operation due to the inertia of the motor and flywheel. Therefore, when the automatic stop device is operated to expose the tape, the first few parts of the tape cannot be used, and when recording or playback is interrupted and then restarted, the number of parts of the tape cannot be used. There is a drawback that the skin tape is not recorded or played back. In order to eliminate such drawbacks, the present invention is designed so that the cartridge tape is separated from the capstan when the cartridge is stopped, and this will be explained below with reference to illustrated embodiments.

Reference numeral 1 denotes a cartridge, and as is well known, an endless magnetic tape 24 is housed in the cartridge, and it runs in the direction of the arrow via a guide roller 25 and a pinch roller 2. .

4 is an insertion slot for the cartridge 1;
is inserted along the roller 5 provided on the left wall 4' of this insertion opening 4.

Reference numeral 10 denotes a pressure lever, which is pivotally supported by a shaft 9, and has a pressure rotatably supported at its tip.

The roller 6 is made to protrude from a window 26 provided in the right wall of the insertion slot 4 by the biasing force of the spring 12. A V-shaped recess or notch 7 is provided in the green right side of the cartridge 1, and the pressure roller 6 squeezes into this, thereby applying a force in the direction of arrow A to the cartridge 1. Due to this force, the left green side of the cartridge 1 is brought into contact with the roller 5, and the cartridge 1 is pushed toward the back of the cartridge insertion opening 4. Pushed cartridge 1
pushes the extrusion village 27 against the biasing force of the spring 28 with its front surface, and the pinch roller 2 pushes the capstan 3
Stops by pressing against. At that time, magnetic tape 2
4 contacts the head 29 and the sensor 30 and is sandwiched between the pinch roller 2 and the capstan 3. The operating shaft 31 of the plunger 11 is attached to the pressure lever 10 on the shaft 3.
The lotus position is determined by 2.

Further, a bent portion 10a is provided near the bent portion 10a, and a tip 16a of the stop punch 16 is disposed opposite to the bent portion 10a.
The stopper 16 is connected to two pins 20' that are hammered into the chassis 22.
It is supported so that it can move forward and backward in the direction of the arrow.
Moreover, it is biased in the opposite direction of arrow B by the spring 17. A pin 21 is provided in a shield on the upper surface of the pressure lever 10, and this pin 21 engages with a heart-shaped cam groove 13a provided on the lower surface of the lock lever 13 (see FIGS. 2 to 4).

This lock lever 13 is connected to a shaft 14 that is connected to the chassis 22.
The pin 15 is mounted on the chassis 22 and passes through an elongated hole 33 formed on the lock lever 13.
A spring 8 attached thereto and a spring 18 attached to the shaft 14 press down on the lock lever 13. When the cartridge 1 is loaded as shown in FIG. 1, the pressure roller 6 engages with the notch 7 of the cartridge 1 due to the urging force of the spring 12, so the cartridge 1 receives a force in the direction of arrow A, and the pinch roller 2 presses the magnetic tape 24 against the capstan 3, so the magnetic tape 24 is driven in the direction of the arrow.

At the same time, the magnetic tape 24 comes into contact with the sensor 30 and the head 29, so that recording or reproduction is performed. When the magnetic tape 24 rotates once, the conductive foil at the seam shorts the sensor 30 and generates a pulse.

When this pulse reaches the predetermined number, that is, the magnetic tape 2
4 rotates a predetermined number of times, the plunger 11 is temporarily energized. As a result, as shown in FIG. 5, the pressure lever 10 rotates in the direction of arrow D against the spring 12, and the pressure roller 6 retreats from the /ch 7.

Thereupon, the cartridge 1' is released from the restraint of the pressure roller 6 and is pushed back by the extrusion punch 27. Therefore, the pinch roller 2 releases its pressure contact with the capstan 3, and the drive of the magnetic tape 24 is stopped. Since this operation is performed immediately after the plunger 11 is energized, the running of the magnetic tape 24 is immediately stopped. The pressure lever 10 rotates in the direction of the arrow ○ due to the bias of the plunger 11, and the pin 2
and the cam groove 13a provided in the lock lever 13, the lock lever 13 is locked in the rotational position shown in FIG.

Then, when restarting, the plunger 11 is temporarily energized again and the lock is released. In order to perform such an operation, the cam groove 13a has a shape as shown in detail in FIG. 4.

That is, although the outer wall 13b of the cam groove 13a is heart-shaped, its center line b is offset, and the inner wall 13c
Although it is heart-shaped, its center line c is offset in the opposite direction to the center line b. When the pressure lever 10 is in the operating position shown in FIG. 1, its pin 21 is in the position indicated by 21a. When the pressure lever 10 rotates from that position, for example in the direction of arrow D, the pin 21 moves to the position 21.
a and presses against the inner wall 13c of the cam groove 13a, but since the center line b of the outer wall 13b and the center line c of the inner wall 13c are misaligned, the lower part of the inner wall 13c (in FIG. ) and move while pushing it away. As a result, the lock lever 13 rotates about the shaft 14 in the opposite direction of the arrow c. Therefore, the pin 21 moves in the direction of the arrow within the cam groove 13a and reaches position 21b. plunger
When the biasing force 11 is cut off, the pressure lever 10 is rotated back in the opposite direction of the arrow D by the force of the spring 12.

As a result, the pin 21 moves toward the inner wall 13c of the cam groove 13a, while the lock lever 13 moves toward the inner wall 13c of the cam groove 13a.
Since the pin 21 rotates in the direction of the arrow c by the force, the pin 21 does not return to its original path, but moves to a position 21c and stops there. Therefore, the pressure lever 10 is prevented from returning further and is locked in the state shown in FIG. 5. When the plunger 11 is biased again in this state, the pin 21 moves from the position 21c toward the outer wall 13b of the cam groove 13a and contacts above the center line b of the outer wall 13b, so it moves to the position 21d. do.

When the bias of the plunger 11 is cut off, the pin 21 returns from the position 21d to the position 21a while contacting the upper side of the outer wall 13b, and stops there.

Therefore, the pressure lever -10 returns to the state shown in FIG. 1 and engages with the cartridge 1 again, so that the cartridge 1 is placed in the set state again and recording or recording is resumed.
This resumption is based on the sensor 30 as described above.
Since the process is carried out immediately after the detection of the stop position by 1, the process is carried out immediately from the joint of the suction tape 24.

When stopping manually, use the plow 1 provided on the stop punch 16.
By pressing 9, the stopper 16 is slid in the direction of arrow B. As a result, the tip 16a of the stop village 16 presses the bent portion 10a of the pressure lever 10 and rotates the pressure lever 10 in the direction of arrow D, so that the plunger 1
The result is the same as if 1 were activated, and recording or playback is stopped. When the pressure of the nail 19 is released, the stop punch 16 is returned to its original position by the force of the spring 17, but the pressure lever 10 is locked by the lock lever 13 and kept in an inoperative state. When the button 19 is pressed again, the result is the same as that of the top plunger 11 being energized again, and the pressure lever 10 is unlocked and becomes operational, and recording or resuming occurs.

As described above, the present invention provides a cartridge tape recording and reproducing apparatus in which the pressure lever, which is biased by a spring so as to bring the pinch roller into pressure contact with the capstan, is moved in the direction of poor production and counterfeiting by the operation lever, and , the lock lever for locking the pressure lever in the working position and the non-working position is provided with a cam groove in the shape in which two locking positions are set;
On the other hand, the pressure lever has a lock that moves back and forth between two locking positions so that it is alternately locked at two locking positions while the cam goes around the cam premises while engaged with the cam groove. In addition, a spring is provided to move the pin while keeping it in relative pressure contact with the wall of the cam groove while the pin reciprocates as the pressure lever moves. The relative movement of the pressure lever allows the pressure lever to alternate between an active position and a non-active position, thereby temporarily separating the pinch roller from the capstan, thereby preventing wasted magnetic tape due to the inertia of the motor and flywheel. It will not be sent and will stop immediately.

Therefore, the beginning of the magnetic tape can be accurately located, and even if recording or playback is interrupted, it can be resumed from the state immediately before it was stopped. In addition, a pin is provided on the pressure lever, and a cam groove that engages with this pin is provided on the lock lever, so that the pressure lever is deactivated and directly locked depending on the position of the pin that moves inside the cam, making it extremely easy to use. For example, it is easier to press the front of the cartridge without disengaging the notch and pressure lever, and since it uses a pin and cam groove, it can be manufactured in large numbers. The pressure lever can be moved from the inactive position to the activated position again without using the lever.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a surface view of the lock lever, FIG. 3 is a side view of the lock lever portion, and FIG. 4 is an enlarged view of the cam groove. FIG. 5 is a plan view when the vehicle is stopped. 1... Cartridge, 7... Notch, 10... Pressure lever, NI... Plunger, 16...
Stop Village, 27... Oshide Village. Shigeru' prisoner scales 2 figures, fins 3 figures, building diagrams 5 figures

Claims (1)

[Claims] 1 Cartridge tape that engages with a notch provided on the cartridge to hold the cartridge in a pushed-in state, and uses a pressure lever to press a pinch roller provided on the cartridge against the capstan against the pushing force. In the recording/playback device, a first spring biases the pressure lever in the direction of the operating position where the pinch roller is in pressure contact with the capstan, and the pressure lever is moved to the operating position against the first spring. an operating lever for moving the pinch roller from the capstan toward a non-operating position where the pinch roller is separated from the capstan; and a lock lever for locking the pressure lever in the operating position and the non-operating position when the operating lever is operated. A cam groove is provided on the lock lever and has a shape in which two locking positions are set, and a cam groove is provided on the pressure lever to engage with the cam groove, and the pressure lever is moved. A locking pin that reciprocates between the two locking positions so that it is alternately locked at the two locking positions during one round of the cam groove, and the reciprocating movement of the pin. A second spring is provided therein for moving the pin while being pressed against the wall of the cam groove, and the pressure lever is moved by the relative movement between the cam groove and the pin. 1. A stop device for a cartridge tape recording and reproducing device, characterized in that the pinch roller is temporarily separated from the capstan by allowing the pinch roller to alternately take the above-mentioned operating position and the above-mentioned non-working position.