JPS6020344A - Twin cassette tape recorder - Google Patents

Abstract

PURPOSE:To obtain a lightweight, thin device which saves battery power by arranging cassette tapes on both front and rear surfaces of the device, allowing recording and reproduction, and dubbing simultaneously, and performing mechanical driving with one motor. CONSTITUTION:The 1st and the 2nd cassette tapes are loaded on the chassis 1 and 1' of cassette tape recorder parts I and II. Gears 2 and 2' of the chassis 1 and 1' are coupled directly with the motor, which is fitted to one of the chassis. Further, the chassis, 1 and 1' are fitted with reversible movable gears 3 and 3', idle gears 4 and 4', and take-up payoff reels 5 and 5', and 6 and 6' with which gears 7 and 8, and 7' and 8' are coupled directly. The chassis 1 and 1' are coupled together by fitting plates 9 and 10, and 9' and 10'. The gears 3 and 3' move to the sides of the reels 5 and 5' in the beginning of winding operation and move to the sides of the reels 6 and 6' in rewinding operation. Thus, the twin cassette tape recorder which saves battery power is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable cassette tape recorder.

Conventional portable cassette tape recorders are devices that have a single recording/playback function, and therefore it is impossible to play and record between two tapes with a single device, and a separate device with cassette tape recorder functions is required. do. Therefore, the connection between the two devices is troublesome, and electric circuit sections such as a power supply and an amplifier are required at two locations, which requires more than twice the space, and the cost also doubles. In addition, there are two drive motors, which are particularly heavy in the mechanical part, which reduces the ease of use as a portable device by half, and doubles the energy consumption of the power supply battery.

The present invention solves the above-mentioned drawbacks, and provides a twin cassette tape recorder that is lightweight, thin, inexpensive, and particularly energy efficient for batteries, with a simple configuration as a device capable of reproducing and recording between two tapes. It is.

Of course, it is also possible to install a radio circuit on the same printed circuit board as a radio.

Some embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of the mechanical part of the first embodiment, and FIG. 2 enlarges the relationship between the gears to facilitate the explanation of FIG. 1.

(1) shows the chassis of the first cassette tape recorder (surface of the device) to which the first cassette tape is attached;
) indicates the chassis of the second cassette tape recorder (back side of the device) to which the second cassette tape is attached. (2) is (
In 1), (2') is a gear directly connected to the motor in (1'). The structure allows only one motor to be installed at the bottom of either chassis. It is also possible to use a chassis with a structure that allows the use of motors on both shafts. (3) is the forward/reverse movable gear in (1), and (3') is in (1'). (4) is (1), (4') is (1'
) idle gear. (5) (6) is (1), (5
') (6') is the reel for driving the cassette tape in (1'), which is directly connected to gears (7), (8), (7') and (8'), and winds (5) and (5'). (6) and (6') are called unwinding and are located on the left and right sides of each chassis. (9)(
10), (9') and (10') are mounting plates for each chassis.Although not shown in the figure, there are also mounting plates on the lower side of the chassis. These can be directly connected to each other, or the chassis can be installed back to back to the mounting parts inside the case.

Thus, at the start of tape winding, the reel (5) on the front side of each chassis is rotated to the left by the left rotation of the motor gear (2) and the right rotation of the forward and reverse movable gear (3). (5') is rotated to the left by the clockwise rotation of (2') and the left rotation of the forward/reverse rotation gear (3') via the idle gear (4'). During rewinding, the reel (6) is rotated clockwise by counterclockwise rotation of the motor gear (2) and clockwise rotation of the forward/reverse gear (3) via the idle gear (4). (6') becomes (3') by clockwise rotation of (2')
Rotates to the right by rotating to the left. That is, (3) (3') moves to the (5) (5') side at the beginning of winding, and moves to the (6) (6') side at the time of rewinding.
) side.

Also, the motors commonly used have a residual torque that is two to three times the required torque, and even if you use the best coreless motor with no iron loss, the maximum efficiency is around 60% and the no-load loss is quite large, but it is As a result, sufficient energy savings can be achieved by using one motor. As an example, the load current for a torque of 5 g-cm is 65 mA, and for a torque of 10 g-cm it is 95 mA.

The required torque for one cassette tape recorder is 5 g-c.
m, two motors require 130 mA, but if one motor is shared, 95 mA is sufficient for 10 g-cm. Therefore, the difference is 35 mA, resulting in an energy saving of about 27%.

Other electric circuit parts can be mounted on a printed circuit board and inserted between the chassis (1) (1') to reduce space and cost by adopting circuits that can be shared.

In addition, since the same case can be used for both the front and back sides of the device, the usual bottom cover is not required, further reducing the cost.

As a second embodiment, although not shown in the drawings, a belt drive mechanism was used instead of gears.

FIG. 3 is a configuration diagram of the present invention, in which the front side shows the first cassette tape recorder section (I) and the rear side shows the second cassette tape recorder section (I).
II) is indicated by dotted line divisions. It has an operation section and input/output terminals similar to those of ordinary cassette tape recorders. In this way, it is possible to provide a portable twin cassette tape recorder that is simple in construction, lightweight, thin, energy saving, capable of dubbing between two tapes at the same time, and inexpensive.

[Brief explanation of the drawing]

Fig. 1 shows the gear relationship in the chassis, and Fig. 2 shows the gear relationship enlarged to make it easier to understand. FIG. 3 shows an outline drawing of the twin configuration of the present invention. (1) (1')...The recorder etc. 1, the chassis for the 2nd (2
) (2')...1st and 2nd gears directly connected to the motor (3) (3
')...First and second forward/reverse movable gears (4) (4')
...Idle gear (5) (5') for first and second...first,
Second cassette tape take-up reel (6) (6')...First and second cassette tape rewind reel (7) (7'), (8) (8')...Cool (5 )(5'
), (6) (6') are directly connected to gears (9) (10), (
9') (10')...Mounting plate (I) of chassis (1), (1')...First cassette tape recorder section (II)...Second
Cassette tape recorder section patent applicant Yoshio Urushibara

Claims (1)

[Claims] Cassette tapes can be placed on both the front and back sides of the device, and recording and playback can be performed simultaneously (or one side can only be played back and the other side can be recorded and played back), or dubbing (copying) from a recorded cassette tape to another cassette tape. ) A portable twin cassette tape recorder (including a case with a built-in radio) that is mechanically driven by a single motor.