JPS6032673Y2 - group learning device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improving the functions of a group learning device.

BACKGROUND ART Group learning devices, such as language practice devices and music practice devices, have been known in the past, in which a plurality of study tables for students are provided for one adjustment console for the teacher.

In conventional sterilization group learning devices, such as language practice devices for learning English conversation, a teaching material signal is supplied from a control console to each learning desk, and students can listen to this teaching material signal through headphones or by using a device installed at the learning desk. I try to learn English conversation by repeatedly recording and playing back on a tape recorder.

In such language practice devices, students are prohibited from taking out the cassette of the tape recorder installed in the study desk without permission from the teacher.

This is to prevent, for example, students from bringing in their own recorded cassettes (therefore the accidental erasure prevention tabs are broken) or from accidentally removing the cassettes.

There is also a language practice device that allows teaching materials to be pre-recorded and placed on a cassette of a tape recorder at each study table before students enter the classroom.

In this device, a recording command signal is sent from a control console to put the tape recorder into recording mode, and teaching material signals are supplied to record on each cassette tape.

In this case, if the tape recorder is in a state where recording is not possible, for example, if the reel stand does not rotate, if a cassette with a broken anti-erasing tab is inserted, or if there is no cassette, check this immediately. It is necessary to issue a tape recorder and avoid using the study desk with the tape recorder.

The present invention was developed in response to the above requirements, and embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, when the tape recorder of the study desk is in a state in which recording is not possible, and when receiving a recording command signal from the adjustment console,
The lock of the opening/closing lid of the cassette mounting part is released by a plunger to open the cassette mounting part.

The circuit shown in FIG. 1 is provided at each study desk.

If a cassette with a broken erase prevention tab is inserted into input terminal 1, '1. (high level) signal is added.

A signal r''1 is applied to the input terminal 2 when the reel stand is not rotating.

71 when no cassette is attached to input terminal 3.
J signal is added.

A recording command signal rIJ is applied to the input terminal 4 from the adjustment console.

Further, a signal rIJ is applied to the input terminal 6 of the AND gate 5 when power is supplied to the study book, and a signal 111 is applied to the input terminal 7 when power is applied to the adjustment console.

Assume that a recording command signal is applied to the input terminal 4 while the study book and the adjustment console are powered on and the rIJ signal is applied to the input terminals 6 and 7.

At this time, if the tape recorder is capable of recording, the outputs of AND gates 8, 9, and 10 will all be r()J.

Therefore, the output of OR gate 11 is ``OJ1 AND gate 5
The output becomes rOJ, and the plunger drive circuit 12 does not operate.

Therefore, the plunger 13 is not driven, and the tape recorder enters the recording mode, and the teaching material signal is recorded on the cassette.

In addition, if recording is not possible, a signal of 71J is applied to any one of input terminals 1, 2. is added.

As a result, the output of the AND gate 9 becomes rIJ, and therefore the output of the OR gate 11 becomes 11J1, and the output of the AND gate 5 becomes rIJ.

As a result, the plunger drive circuit 12 is operated to drive the plunger 13, thereby opening the cassette opening/closing lid.

Incidentally, the output of the AND gate 5 may be sent to the adjustment console to light up the display lamp of the corresponding study book on the adjustment console.

In order to detect the rotation of the reel stand, the output of an FC (frequency generator) provided in the reel stand drive motor may be used.

Further, if the motor is a brushless motor, a drive pulse obtained from a drive circuit 15 of the motor 14 and energized to an armature coil may be used as shown in FIG.

For example, by triggering the glue-trigger type monomulti 16 with a predetermined time constant using the drive pulse, a detection signal that changes from rOJ to rIJ can be obtained from the monomulti when the motor does not rotate.

As described above, the present invention opens the lid of the cassette loading section if the reel stand does not rotate when a recording command signal is applied, so that this type of collective learning device is prevented from recording. You can quickly find the tape recorder in your home.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an example of a rotation detection circuit. In addition, in the symbols used in the drawings, 2, 4... Input terminal, 9... AND gate, 15 - Music live circuit, 16... Retrigger type mono multi. be.

Claims (1)

[Scope of utility model registration request] In a group learning device in which a recording and reproducing device provided at a study table is set to a recording mode by a recording command signal applied from an adjustment console, a rotation detecting means of a reel stand of the recording and reproducing device is provided, When the rotation detecting means detects that the reel stand does not rotate when the reel stand is applied, the lid of the cassette mounting section of the recording and reproducing device is opened based on this detection signal. Group learning device.