JPS6020185Y2 - Tape recorder remote control device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a remote control device for a tape recorder, and more particularly to a simple remote control device that can be remote-controlled without using a plug-in jack for connecting a remote control switch.

Conventional simple remote control devices for telecos have a plug-in jack for connecting a remote control switch in addition to the microphone input jack on the teleco side, and when the microphone plug is inserted into the microphone input jack, the remote control switch plug is inserted into another jack at the same time. In many cases, a switch on the microphone side is used to turn on and off the motor of the tape recorder, thereby remotely controlling the running of the tape.

However, these conventional examples require two jacks and two plugs, have a large number of parts, and have drawbacks such as poor operability of the plug joint.

Therefore, this invention was devised to eliminate the drawbacks of the above-mentioned conventional example, and its details will now be explained with reference to the illustrated embodiment.

1 is an electric microphone with an internal impedance element 2 such as a moving coil or matching transformer of 600Ω.
~IQKΩ and a DC resistance value of 80~kuΩ are used.

2 is a remote control switch connected in series to the impedance element Z in the microphone 1 and connected to the hot side 3a of the two-pole plug 3, and the other side of the impedance element 2 is connected to the ground value 3b of the plug 3.

On the other hand, one plug-in jack 5 is provided on the tape recorder 4 side, and its earth ring 5a is grounded, and the microphone input tongue 5b is connected to the input end of a microphone amplifier 7 via a capacitor 6. .

Further, the intermediate tongue piece 5c, which is always in contact with the tongue piece 5b of the jack 5, is connected to an electret microphone 9 inside the teleco via a capacitor 8, and the tongue piece 5C is grounded through a resistor 10.

Further, the tongue piece 5b is connected to the power supply 1B through a bias resistor 11 with a value as large as possible, and is connected to the base of a transistor 13 whose collector is grounded through a resistor 12, and its emitter is connected to the power supply 1B through a resistor 14. Also, resistor 15
are connected to the bases of other common collector transistors 16 through the respective terminals.

The emitter of the master transistor 16 is connected via a resistor 17 to the base of a driving transistor 18 for the motor M, this base is connected via a resistor 19 to the power supply 1B, the emitter of the transistor 18 is connected to the 1B, and the collector is connected to the motor M. It is connected via.

The configuration of this invention is as described above, with three microphone plugs.
In the illustrated state in which the transistor 13 is not inserted into the jack 5, the base of the transistor 13 is connected to the resistor 12, the tongues 5b and 5c, and the resistor 1.
0 are grounded in series, and the base current flows and turns on, and as the collector potential drops, transistor 16 and transistor 18 are also turned on, and the motor M rotates normally and the tape recorder plays. ,
It is possible to selectively perform any mode of fast forwarding or rewinding.

Next, when the microphone plug 3 is inserted into the jack 5, the tongues 5b and 5c are separated, and when the switch 2 is open, the base current of the transistor 13 is cut off by the switch 2, and the transistor 13 is turned off. 16 and 18
is off and the remoter M automatically enters the stop mode.

In this state, when the remote control switch 2 is closed, the microphone output is input to the microphone amplifier 7 via the switch 2 and the capacitor 6, where it is amplified. A base Sumi current (of the μA order, so there is no problem in using the microphone) flows, turning on the transistor 13.
The transistors 16 and 18 in the next stage are also turned on, and the motor M
starts and continues to rotate to obtain the recording mode of the tape recorder, etc., and can be controlled arbitrarily by opening and closing the remote control switch 2 from fast-acting.

Note that the motor M may be kept rotating at all times, and the plunger for displacing the pinch roller or the like may be controlled by the transistor 18 instead of the motor M.

As mentioned above, this invention connects a remote control switch in series to the internal impedance element of the microphone, and uses this switch to control switching elements such as transistors to remotely control tape recorder drive control members such as motors and plungers. As a result, this invention eliminates the need for a remote control plug and jack, which were required in the past, and is therefore advantageous in terms of cost and space. The set of devices of the present invention has many advantages over the other devices.

[Brief explanation of drawings]

The drawing is a circuit diagram showing an embodiment of this invention. Explanation of symbols, 1...Microphone, 2...
...Remote control switch, 3...Plug, 4...
...Tape recorder, 5...Plug-in jack, 13,16°18...Transistor,
2...Internal impedance element of the microphone.

Claims (1)

[Scope of utility model registration request] A remote control switch is connected in series to the audio signal output line of the microphone, and when the microphone is connected to the microphone jack of the tape recorder, the DC signal transmission line including the audio signal output line and the microphone jack is connected via the switch. By using the transmission line as a control signal transmission line for an operation switching circuit provided in a tape recorder, operation of the switch controls the supply of audio signals from the microphone, and also controls the operation of the tape recorder. A remote control device for a tape recorder that controls its operation.