JPS6040981Y2 - Tape running device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape running device for a dual capstan type tape recorder.

The dual capstan system has two capstans as shown in Figure 1.
A flywheel 16.16a coaxially connected to each capstan 17.17a is rotated by rotating a pulley 15 with a closed loop belt 19, and the magnetic tape 20 is pinched by a pinch roller 18°. 18a is in contact with the capstan 17.17a to run the tape 20, and it is a high-quality product with features such as less uneven back tension, stable tape running, good head touch, and less modulation noise. This is what is used in the machine.

Conventionally, the pulley 15 was directly rotated forward (indicated by the arrow) or reversely by the DC motor or the AC motor 14 to cause the tape to run in the forward direction (indicated by the arrow) or in the reverse direction.

However, when using a DC motor, there is a drawback that the same high performance cannot be achieved in forward and reverse rotation.Also, when using an AC motor, it is necessary to switch the frequency when used in areas with different power supply frequencies. , high vibration and heat generation,
There were disadvantages such as magnetic flux leakage, poor efficiency, and the need for symmetrical starting coils, which made them expensive.

The present invention improves on these drawbacks by taking advantage of the features of the dual capstan system and using two DC motors that rotate in opposite directions to run the tape in the forward or reverse direction. , when one motor runs the tape, the other motor winds the tape.

This will be explained in detail according to FIG.

Two flywheels 6.6a having capstans 7.7a coaxially integrated are arranged, and a pulley (a coaxially integrated idler pulley) is placed at the apex of an isosceles triangle whose base is the line connecting both capstans 7.7a. 4 and a belt pulley 5), a closed loop belt 11 is installed around the belt pulley 5 and two flywheels 6.6a, and a direct current motor 1 for forward rotation and a direct current motor 1a for reverse rotation are symmetrically arranged. Set up

When the tape 12 is run in the forward direction (arrow), the idler 3 is operated so as to come into contact with the motor pulley 2 of the motor 1 and the idler pulley 4, and the rotation of the motor 1 is transmitted to the belt pulley 5 so that the belt 11 Rotate the flywheel 6.6a in the direction of the arrow and rotate the capstan 7.6a.
Pinch rollers 8, 8a are brought into pressure contact with the tape 12 between them, and the tape 12 is moved in the direction of the arrow.

At the same time, the idler block 9a is brought into contact with the motor pulley 2a of the motor 1a and the reel shaft pulley 10a on the tape winding side.
0a, and the tape 12 is wound up.

In this case, the idler 3a and idler block 9 do not operate.

FIG. 2 shows the above state, where 10 is a tape supply side reel shaft pulley, and 13 is a magnetic head.

Next, when the tape 12 is run in the opposite direction, the idler 3a is operated so as to come into contact with the motor pulley 2a and the idler pulley 4 of the motor 1a, and the rotation of the motor 1a is transmitted to the belt pulley 5 and the tape 12 is fried by the belt 11. Rotate the wheel 6.6a in the opposite direction and remove the capstan 7.
The tape 12 is sandwiched between the tape 7a and the pinch rollers 8, 8a are brought into pressure contact with the tape 12 to run the tape 12 in the feeding direction.

At the same time, the idler block 9a is brought into contact with the motor pulley 2 of the motor 1 and the reel shaft pulley 10 on the tape supply side, and the rotation of the motor 1 is transmitted to the reel shaft pulley 10 to wind up the tape 12.

In this case, the idler 3 and idler block 9a do not operate.

Incidentally, instead of using the idler blocks 9, 9a, the rotation of the motors 1, 1a can be electrically controlled and decelerated.

Since the present invention is constructed as described above, the conventional drawbacks are improved, the motor pulleys 2, 2a, the idler blocks 9, 9a are arranged symmetrically, and the motor for winding the tape can be used in common. is not required separately, the dual capstan system can be constructed at low cost, and motor 1,
Since 1a uses a device exclusively for forward and reverse directions, the difference in performance between forward and reverse directions can be reduced, making it extremely useful in terms of performance and practicality.

[Brief explanation of the drawing]

FIG. 1 is a mechanical diagram of a conventional tape running device, and FIG. 2 is a mechanical diagram of the device of the present invention. 1.1a is a DC motor, 2, 2a are motor pulleys, 3,
3a is an idler, 4 is an idler pulley, 5 is a belt pulley, 6.6a is a flywheel, 7.7a is a capstan, 9.9a is an idler block, 10.10a is a reel shaft pulley, 11 is a belt, 12 is a tape It is.

Claims (1)

[Scope of utility model registration request] A belt 11 is installed on two flywheels 6.6a having a capstan 7.7a integrally coaxially with the belt pulley 5. A DC motor 1 for forward rotation and a DC motor 1a for reverse rotation.
11 pairs of idlers 3, 3a, 1 pair of idler blocks 9
, 9a are arranged symmetrically, and the idler 3 or 3a is brought into contact with the idler pulley 4 coaxially integrated with the belt pulley 5 and the motor boot 2 or 2a of one of the motors 1 or 1a to run the tape 12, A tape running device configured to wind a tape 12 by bringing an idler block 9a or 9 into contact with the motor pulley 2a or 2 of the other motor 1a or 1 and the reel shaft pulley 10a or 10.