JPS5847536Y2 - Power switch device for voice activation device of tape recorder - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a power switch device in a voice activation device for a tape recorder.

The voice activation device of a tape recorder is activated by the output signal of the microphone every time a voice enters the microphone of the tape recorder, and activates the tape recorder each time, and the magnetic tape is fed in a non-recording state. This has the advantage of eliminating energy consumption and reducing power consumption.

By the way, in the conventional type of voice activation device that requires the power supply from the built-in power supply of the tape recorder, if this voice activation device is connected to the tape recorder, even when the voice activation device is not in use, the voice activation device was connected to the power source and turned on, and was in a so-called standby state, which caused the problem that the power supply was consumed.

The present invention provides a power switch device for a voice activation device of a tape recorder, which eliminates the above-mentioned problems of the conventional device by providing a power switch at the connection part of the voice activation device with the built-in power source of the tape recorder. With the goal.

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in the drawings.

In this embodiment, a voice activation device is detachably connected to a well-known ultra-small cassette tape recorder that uses a microcassette tape, and a recording microphone built into the tape recorder is used to drive the voice activation device. Although this is an example of a case where a tape recorder is activated by voice, the present invention can of course be applied to a case where a voice activation device is built into the tape recorder.

As shown in FIGS. 1 and 2, the ultra-small cassette tape recorder t is provided with a cassette loading chamber lid 3 having a viewing window 3a for the cassette tape at the top of its top surface 1a.
This lid 3 is opened and closed by a hinge 4.

A speaker 5 is disposed below the hinge 4.

On the front 1b, there are operation buttons 7 for fast forwarding and rewinding the tape.
, built-in microphone window 8, and pause button 9 are arranged, and furthermore, on the right side 1c, a tape recorder recording,
A group of operation buttons 10 for performing playback and stop operations, and an eject button 11 for opening the lid 3 and ejecting the cassette tape are provided on the left side 1d.

A display member 6 for displaying the recording status and battery check is disposed near the lid 3 on the top surface 1a of the housing.

The back surface 1e of this tape recorder t serves as a coupling surface for the voice activation device 2.

This coupling surface has a screw hole 12 (see FIG. 2) into which the coupling screw 22 (see FIG. 3) of the voice activation device 2 is screwed, and a positioning groove 13a for connecting the voice activation device 2.
, 13b, electrical circuit connection terminals 14a to 14d,
An external power supply jack 15 is provided respectively.

The voice activation device 2, which is detachably connected to the ultra-small cassette tape recorder 1, is formed as shown in FIG. has a coupling screw 22 in its center.
protrudes, and on the left and right side there are positioning protrusions 23a,
23b, and further below it is a terminal 24 for connecting an electric circuit.
a to 24d and a control signal output plug 24e are provided, respectively.

The coupling screw 22 is rotatably attached through the housing of the voice activation device 2, and its head 22a (see Figures 1 and 2) is arranged to protrude from the back surface 2e of the housing. There is.

Furthermore, this coupling screw 22 serves as an electrical circuit grounding terminal for the audio activation device 2, and when the tape recorder any audio activation device 2 is connected with the screw 22, the electrical circuits of both are grounded. The body is commonly grounded by a screw 22.

On the top surface of the voice activation device 2, an operation button 16A of a power switch device 16 (described later) is provided for connecting an internal circuit, which will be described later, to a built-in power source on the tape recorder.

As shown in FIG. 4, the electric circuit of this voice activation device 2 is composed of an amplifier circuit 25, a rectifier circuit 26, a constant voltage circuit 27, and a transistor switching circuit 29 equipped with a Schmitt circuit. Each of these consists of an electric circuit of a well-known configuration.

Both ends of these circuits are connected to the power switch device 1.
The connection terminal 24a is connected to the connection terminal 24a by the double-throw switches 16a and 16b.

It is connected to the built-in power supply 30 of the tape recorder 1 via the power supply 14a.

The width amplifying circuit 25 is the connection terminal 14d.

It serves to amplify the output of the microphone coming in through 24d and add it to the rectifier circuit 26 at the next stage.

The rectifier circuit 26 rectifies the output from the amplifier circuit 25 and applies it to the transistor switching circuit 29 via the Schmitt circuit.

The constant voltage circuit 27 is the connection terminal 14a.

24a and one switch 16a of the power switch device 16, when the power supply in the tape recorder 1 is connected to the voice activation circuit, the operating voltage from this power supply is stabilized, and the stabilized constant voltage is is connected to the connection terminal 24b through a decoupling circuit consisting of a resistor R9 and a capacitor C6.

It serves to supply this constant voltage to the built-in microphone of the tape recorder 1 via 14b, and directly to each of the circuits 25 and 26.

Note that the capacitor C6 is grounded through the connection terminal 24c.

The transistor switching circuit 29 is
The rectifier circuit 2 is supplied with voltage from the switch 16a.
Switching operation is performed by the output of 6.

When this circuit 29 performs a switching operation, the operating voltage is supplied to the electric circuit on the tape recorder 1 through the control signal output plug 24e and the movable contact piece 15a of the external power jack 15 of the tape recorder 1. It's happening.

The control signal output lug 24e is composed of an insulating inner cylinder 24e2 inside a conductive outer cylinder 24e1, and the external power jack 15 has the movable contact piece 15a in contact with the movable contact piece 15a. When the two are connected, the negative pin terminal 15c fits into the insulating inner cylinder 24e2, and the movable contact piece 15a fits into the conductive outer cylinder 15a. The contact piece 15b comes into contact with the fixed contact piece 15b and is separated from the fixed contact piece 15b.

In addition, the connection terminal 24b is connected to the connection point between the capacitor C6 and the resistor R9 of the decoupling circuit, and when the voice activation device 2 is coupled to the tape recorder 1, the connection terminal 24b and the recorder 1 are connected to each other. An operating voltage is applied to the built-in microphone on the tape recorder through the connection terminal 14b (see FIG. 2) of the tape recorder.

In addition, the built-in microphone on the tape recorder mentioned above is
Normally, that is, when outside the voice activation circuit, the operating voltage is supplied from a microphone power supply terminal (not shown) inside the tape recorder.

The voice activation device 2 configured as described above has a first
, 2, the coupling surface 2b of the voice activation device 2 is brought into contact with the back surface 1e of the tape recorder 1, and the protrusions 23a and 23b are fitted into the positioning grooves 13a and 13b, and then the coupling is performed. When screw 22 is tightened, screw 2
2 is screwed into the screw hole 12, and the voice activation device 2 is coupled on the tape recorder as shown in FIG.

When these are combined, the connection terminal 24 of the voice activation device 2
a to 24d and the control signal output plug 24e are connected to the connection terminals 14a to 14d of the recorder 1 and the external power jack 15, respectively, so that the voice activation device 2
The electric circuit is connected to the electric circuit of the recorder 1.

In this state, operate chief recorder 1 to the operating state,
When the operation button 16A of the power switch device 16 is turned on,
When the connection terminal 24a comes into contact with the connection terminal 14a and the switches 16a and 16b conduct the voice activation circuit, the built-in power supply 30 of the tape recorder 1 is connected to the electric circuit of the voice activation device 2, and the circuit is activated. Put it on standby.

Further, when the connection terminal 24d contacts the connection terminal 14d, the output end of the built-in microphone of the tape recorder 1 is connected to the input end of the amplification circuit 25 of the voice activation circuit, and furthermore, the control signal plug 24d conductive outer cylinder 24e 1 is the movable contact piece 15a of the external power jack 15
The output terminal of the transistor switching circuit 29 of the audio activation circuit is connected to the tape recorder 1
Connected to the operating voltage supply terminal.

The output voltage of the constant voltage circuit 27 of the voice activation circuit is
When the connection terminals 24b and 14b come into contact, a voltage is applied to the built-in microphone, and the microphone becomes activated.
The operation of the tape recorder 1 is completely controlled by the voice activation device 2.

Therefore, in this state, when a voice enters the microphone, the output of the microphone is transferred to the amplifier circuit 2 of the voice activation circuit.
5, the voice activation circuit is activated and the connection terminals 14a, 24a□ switching circuit 29
The voltage of the power supply 30 is applied to the tape recorder through the path of the conductive outer cylinder 24ei and the movable contact piece 15a, so that the tape recorder is operated, the motor is driven, and the magnetic tape is fed.

Moreover, since this series of operations takes place in an instant,
The motor is driven almost simultaneously when audio enters the microphone.

Therefore, there is no delay in the operation of the motor, and the recording operation of the tape recorder is effectively automatically controlled by voice activation.

As described above, the microphone operating circuit of the present invention operates by obtaining an operating signal voltage from a voice activation device connected to a tape recorder, and puts the built-in microphone into an operating state.

Therefore, voice activation can be performed using the tape recorder's built-in power supply and built-in microphone.

As described above, according to the present invention, the built-in microphone can be operated using the built-in power supply of the tape recorder without supplying the operating voltage for the built-in microphone from the outside, and moreover, the built-in microphone can be operated by using the built-in power supply of the tape recorder, and the voice activation device 2 is connected to the built-in microphone. When the operation button 16A is turned OFF with X, the double throw switch 16a,
16b disconnects both ends of the voice activation circuit from the built-in power supply 30, so that consumption of the power supply can be easily prevented.

At that time, the switch 16a is connected to the conductive outer cylinder 24e.
The built-in power supply 30 is connected to 1, and therefore,
Even if the voice activation device 2 is turned off in the connected state, the operation of the tape recorder 1 will not be hindered.

Note that the present invention can be fully applied to voice activation devices having circuit configurations other than those shown in the drawings.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a tape recorder and a voice activation device connected to the tape recorder to which the present invention is applied, and FIG. 2 is a perspective view showing the tape recorder and voice activation device in FIG. 1 separated. Figure 3 is the same as above.
, 2 is a perspective view of the voice activation device seen from another direction, and FIG. 4 is an electrical circuit diagram of the voice activation device embodying the present invention. 1...Tape recorder, 2...Voice activation device, 1
5... Power switch device, 16A... Operation button, 16
a. 16b...Double-throw switch that connects both ends of the circuit of the voice activation device, 30...Built-in power supply of the tape recorder.

Claims (1)

[Scope of utility model registration request] A voice activation device for a tape recorder that is detachably connected to a tape recorder, powered by the built-in power supply of the tape recorder, and activated by the output of the built-in microphone of the recorder, in which the voice activation device is connected to the tape recorder. , a power switch for switching between a state in which the built-in power supply is connected to a voice activation circuit in the voice activation device and a state in which the built-in power supply is connected directly to an electric circuit in the tape recorder without going through the voice activation circuit. A power switch device in a voice activation device, characterized by comprising: