JPH0333960Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tape recorder speed adjustment mechanism that drives two tape recorders with one drive motor.

[Prior art]

Conventionally, there is a tape recorder in which a drive motor is arranged and fixed between two tape recorders arranged side by side, and the flywheels of the two tape recorders are connected to each other by a drive belt. In these tape recorders, the rotation speed of the drive motor is selected so that the tape feed speed is a specified constant speed, and the outer diameter dimensions of the belt circumferential groove of the output shaft pulley and flywheel are designed, and the length of the belt is The diameter and outer diameter dimensions are selected and used.

However, unlike the case of independent individual tape recorders, the disadvantage is that when the tape recorded on one tape recorder installed side by side is played back on the other tape recorder, it will feel strange if the tape speed differs even slightly. be.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention provides a tape recorder in which the drive motor is movable in directions opposite to the tension of the drive belt so that the tape feeding speeds of tape recorders arranged in parallel can be adjusted to be approximately the same. The purpose is to propose a speed adjustment mechanism.

[Structure of the idea]

In the present invention, drive motors connected to the flywheels of the two tape recorders by drive belts are placed between two parallel tape recorders, and are movable in directions opposite to the tension of the drive belts. This is because it was established in

〔Example〕

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. The speed adjustment mechanism of a tape recorder is shown in FIGS. 1 to 3, in which two capstan shafts 2 and 3 are rotatably supported at intervals on a substrate 1, and flywheels 4 and 5 are fixed to the capstan shafts 2 and 3, respectively. ing. A drive motor 6 is fixed to a mounting plate 7 between the flywheels 4 and 5, and the pulley 8 of the drive motor 6 and the circumferential groove 4 of the flywheels 4 and 5 are connected to each other.
Drive belts 9 and 10 are stretched between a and 5a, respectively.

The mounting plate 7 is formed with a bent part 7b having an L-shaped hook part 7a on one side, and has a round through hole 1 in the board 1.
a, the bent portion 7d is rotatably inserted into the portion a and is latched by the hook portion 7a, and has a screw hole 7c on the other side.
An arcuate long hole 1 is formed and bored in the substrate 1.
The screw 11 inserted into the screw hole 7c is screwed into the screw hole 7c.

When the rotational speeds of both flywheels 4 and 5 are adjusted, loosen the screw 11 and, for example, hang a tape on which a signal of a certain frequency has been recorded on both tape recorders and send it in the reproducing state. The mounting plate 7 is moved left and right around the bent portion 7b so that the rotational speeds of the flywheels 4 and 5 are approximately the same, and the screws 11 are fixed at a position where reproduction outputs of approximately the same frequency are produced.

When the speed adjustment mechanism of the tape recorder is configured as described above, the pulley 8, the flywheel 4,
The difference in tape feeding speed due to variations in the dimensions of the circumferential grooves 4a, 5a of No. 5 and the drive belts 9, 10 has been corrected, and the tape feeding speeds of the two tape recorders installed side by side are now approximately the same, and one tape recorder When a recorded tape is played back by the other tape recorder, the discomfort caused by the difference in tape feeding speed is eliminated.

The mounting plate 7 has a bent portion 7 as shown in FIG.
An adjustment bent portion 7e is provided on an extension piece extending from d, and protrudes upward from the elongated hole 1c of the substrate 1, and a screw 1 is attached to the bent walls 1d, 1d bent at both ends of the elongated hole 1c.
2 and 12 may be screwed together and the position of the mounting plate 7 may be finely adjusted by sandwiching both ends of the adjustment bent portion 7e.

In the above description, the mounting plate 7 was described as being rotatable, but it may also be moved in parallel.

[Effect of idea]

Since the present invention is constructed as described above, it is possible to make the tape speeds of two tape recorders installed in parallel almost the same, correcting the difference in tape feeding speed due to variation in dimensions, and with a simple construction, it is possible to It is possible to provide a speed adjustment mechanism for a tape recorder that has excellent practical effects such as eliminating the problem.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view of the main part of the speed adjustment mechanism of a tape recorder, FIG. 2 is a partially sectional side view of the main part, and FIG. 3 is an exploded perspective view of the main part. FIG. 4 is a perspective view of essential parts of a modified example. 4, 5... Flywheel, 6... Drive motor, 9, 10... Drive belt.

Claims (1)

[Scope of utility model registration request] Drive motors connected to the flywheels of the two tape recorders by drive belts are provided between the two parallel tape recorders so as to be movable in directions opposite to the tension of the drive belts. A tape recorder speed adjustment mechanism featuring: