JPS62277650A - Tape recorder device - Google Patents

Abstract

PURPOSE:To contrive coincidence of the tape driving speeds between the tape recorder mechanism parts by dividing one of the 1st and 2nd pulleys into two parts centering on a groove, controlling the counter spaces of both divided parts and changing the belt hooking depth against said groove for control of the tape driving speed. CONSTITUTION:A pulley part 30 is divided into two parts centering on a groove 30a. A screw part 25a is formed to a pulley main body 25 and a control knob 31 is driven into the part 25a. Then the counter spaces of two divided parts can be controlled by turning the knob 31 to change the height of a pulley member 29. A belt 24 is also moved when the member 29 is moved with rotations of the knob 31. As a result, the center position of the section of the belt 24 is moved and the hooking depth of the belt 24 is changed against the groove 30a. Then the diameter of the part 30 is substantially changed. In such a way, the same tape driving speed is secured via control between the tape recorder mechanism parts.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) This invention provides a tape recorder in which one motor controls the tape running of a plurality of tape recorder mechanisms. The present invention relates to an apparatus, and particularly to an apparatus that allows tape running speed to be easily adjusted with a simple configuration.

(Prior Art) As is well known, in the case of cassette tape recorders, for example, there is a so-called double cassette tape recorder that has multiple (usually two) cassette tape recorder mechanisms built into the same cabinet. There is. In this case, conventionally, a plurality of independent cassette tape recorder housing sections are simply arranged in the same cabinet, which has the problem of being wasteful and economically disadvantageous.

Therefore, in recent years, it has been considered to simplify the configuration by controlling the tape running of two cassette tape recorder mechanisms using the rotational force of one motor. FIG. 3 shows the configuration of a double cassette tape recorder employing such a system. In other words, 11 in the figure is a main chassis constituting the first cassette tape recorder mechanism, which includes a pair of reels 12 and 13, and a flywheel 1.
4, a capstan 15, etc. are rotatably supported.

In addition, 16 in the figure is a main chassis constituting the second cassette tape recorder mechanism, and a pair of reels 17.1
8. A flywheel 19, a capstan 20, etc. are rotatably supported. Note that in the first and second cassette tape recorder mechanism parts, parts such as a pinch roller and a head are omitted for simplicity.

Here, a motor 21 is installed between the first and second cassette tape recorder mechanism sections.

A rotating shaft (not shown) of this motor 21 is fitted onto a pulley 22 . The pulley 22 is arranged as shown in FIG.
), as shown in (b), the two pulley parts 22a,
22b coaxially and integrally formed.

Of these, the pulley portion 22b is connected to the flywheel 14 of the first cassette tape recorder mechanism via the belt 23 so as to be able to transmit rotational force, and the pulley portion 22a is connected to the flywheel 14 of the first cassette tape recorder mechanism via the belt 23.
4 to the flywheel 19 of the second cassette tape recorder mechanism so that rotational force can be transmitted thereto.

Therefore, by rotating one motor 21, the flywheels 14 and 19 of the two cassette tape recorder mechanisms, that is, the capstans 15 and 20, can be rotated at a constant speed, and the first and second The tape can be run at a constant speed in the cassette tape recorder mechanism at the same time, and for example, a function such as recording a signal reproduced by the first cassette tape recorder mechanism by the second cassette tape recorder mechanism can be achieved with a simple configuration. It is something that can be realized.

Although not shown, motors for rotating the reels 12, 13 and 17, 18 are installed in each cassette tape recorder mechanism.

However, in the conventional cassette tape recorder as described above, each pulley portion 22a of the pulley 22.

Due to variations in the diameter of the flywheels 22b and variations in rotational force transmission accuracy due to differences in the length of the belts 23.24, the rotational speed of each flywheel 14.19 may vary even though they are driven by the same motor 21. This results in a difference, which in turn causes a problem in that the tape running speeds do not match between the first and second cassette tape recorder mechanisms.

(Problems to be Solved by the Invention) As described above, in the conventional tape recorder device in which one motor controls the tape running of a plurality of tape recorder mechanisms, the tape running speed between each tape recorder mechanism is The problem is that there are differences between the two.

Therefore, the present invention was made in consideration of the above circumstances, and an object of the present invention is to provide an extremely good tape recorder device that has a simple configuration and can easily match the tape running speed between each tape recorder mechanism section. shall be.

[Structure of the Invention] (Means for Solving the Problems) That is, the tape recorder device according to the present invention is provided with a tape recorder device that is rotatably driven by the rotational force of a motor, and has a concave groove for hanging a belt on its circumferential surface. first and second pulleys;
In a tape recorder device comprising first and second tape recorder mechanisms in which the rotational forces of the first and second pulleys are transmitted via belts to run the tape, the first and second pulleys One of the belts is divided into two parts with a groove as a boundary, and the opposing distance between the two divided parts can be adjusted by UA, so that the tape running speed can be adjusted by changing the depth of engagement of the belt with the groove. be.

(Function) According to the above configuration, the pulley is divided into two parts with the groove as a boundary, and the opposing distance between the two divided parts is adjusted to change the depth of engagement of the belt with the groove. As a result, it is equivalent to changing the diameter of the pulley,
The tape running speed can be adjusted.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 25 denotes a pulley body formed in a substantially cylindrical shape, into which a rotating shaft of a motor (not shown) is fitted. A pulley portion 26 having a substantially V-shaped groove 26a along the circumference is formed at the lower end of the pulley body 25 in the drawing. The pulley section 26 is connected via the belt 23 to the flywheel 14 of the first cassette tape recorder separate section so as to be able to transmit rotational force.

Further, a tapered portion 26b is formed on the circumferential side of the upper surface of the pulley portion 26 of the pulley body 25 so that its diameter increases from the top to the bottom in the drawing. Roughly speaking, a recess 2 is formed on the inner circumference of the upper surface of the pulley portion 26 of the pulley main body 25 in the drawing.
7 is formed, and a coiled spring 28 is loosely fitted into the recess 27.

Here, a substantially ring-shaped pulley member 29 is fitted from the upper part of the pulley main body 25 in the drawing. This pulley member 29 faces the upper surface of the pulley portion 26 in the drawing, and a tapered portion 29a is formed in the portion facing the tapered portion 26b so that the diameter increases from the bottom to the top in the drawing. .

By facing these tapered parts 26b and 29a, the pulley part 3 having a substantially V-shaped groove 308 is formed.
0 is formed. This pulley portion 30 is connected to the flywheel 19 of the second cassette tape recorder mechanism via the belt 24 so as to be able to transmit rotational force.

That is, the pulley portion 30 is divided into two parts with the groove 30a as a boundary.

In this case, the pulley member 29 is urged upward in the figure by the spring 28. Further, a threaded portion 25a is formed at the upper end of the pulley body 25 in the drawing, and an adjustment knob 31 formed in a substantially ring shape is screwed into this threaded portion 25a. And this adjustment knob 31
The lower part of the pulley member 29 in the figure is in contact with the upper part of the pulley member 29 in the figure. Therefore, by rotating the adjustment knob 31, the height of the pulley member 29 can be changed.

That is, it is possible to adjust the facing distance between the two portions that constitute the pulley portion 30.

Now, assume that the adjustment knob 31 is rotated to move the pulley member 29 from the position shown by the solid line in FIG. 2 to the position shown by the dashed line. Then, the belt 24 wound around the pulley portion 30 is moved from the position shown by the solid line in FIG. Only 2 pulley parts 3
0, that is, the depth of engagement of the belt 24 with the groove 30a has been changed.

This is equivalent to substantially reducing the diameter of the pulley section 30, and even if the pulley main body 25 is rotated at the same rotational speed, the This allows the rotation speed of the flywheel 19 to be slowed down.

Therefore, according to the configuration of the above embodiment, by rotating the adjustment knob 31, the belt on the pulley portion 30 is adjusted to the rotational speed of the flywheel 14 connected to the pulley portion 26 via the belt 23. The rotational speed of the flywheel 19 connected through the tape recorder mechanism 24 can be adjusted, and the tape running speed can be adjusted equally between each tape recorder mechanism section.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] Therefore, as detailed above, according to the present invention, an extremely good tape recorder device is provided which can easily match the tape running speed between each tape recorder mechanism section with a simple configuration. be able to.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an embodiment of a tape recorder device according to the present invention, Fig. 2 is a side view for explaining the operation of the same embodiment, and Fig. 3 is a power transmission system of a double cassette tape recorder. FIG. 4 is a configuration diagram for explaining a conventional power transmission means. 11... Main chassis, 12.13... Reel,
14... Flywheel, 15... Capstan,
16... Main chassis, 17.18... Reel,
19... flywheel, 20... capstan,
21...Motor, 22...Pulley, 23°24...
・Belt, 25... Pulley body, 26... Pulley part, 27... Recess, 28... Spring, 29...
Pulley member, 30...Pulley part, 31...Adjustment knob. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] First and second pulleys are both rotationally driven by the rotational force of the motor and have concave grooves for belt hanging on the circumferential side, and the rotational forces of these first and second pulleys are transmitted through the belts, respectively. In the tape recorder device, one of the first and second pulleys is divided into two parts with the groove as a boundary, and the divided part is divided into two parts. A tape recorder apparatus characterized in that the distance between the two parts facing each other is adjustable, and the depth of engagement of the belt with the groove is changed to adjust the tape running speed.