KR860002472Y1 - Automatic selector of function key button in audio system - Google Patents

Abstract

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Description

Function key button automatic selection device of sound equipment

1 is a schematic diagram of the present invention.

2 is an embodiment circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

1: Automatic Switching Circuit 1-1: First Switch

1-2: 2nd switch part 1-3: Reverse stop part

1-4: control unit 1-5: third switch unit

The present invention is a sound system of a component system with or without a remote control function, and does not operate an amplifier function selection switch such as a tuner, a phono, a deck, or the like when a cassette deck is played (PLAY) or a record (REC). If not, the present invention relates to a function key button automatic selection device of a sound apparatus capable of operating a cassette player with only a single operation such as a PLAY key, a REC key, and the like.

For example, in a conventional general audio device, in order to play a tape by operating a cassette player, place an amplifier function selector switch such as a tuner, phono, or deck of the audio device on the deck, and then operate the cassette deck's play key. In the case of tape recording using a cassette player, the player had to operate the cassette deck's play key and the record key after placing the amplifier function selector switch on the deck. This was accompanied by inconvenience and hassle in using the product, which requires manual manual operation 2-3 times.

The present invention has been devised in view of the above, and when using a cassette player of an audio device, the cassette player can be operated by a single key operation (PLAY key, REC key, etc.) of the cassette deck without the amplifier function selection switch of the audio device. The purpose is to provide the user with convenience in using the product.

This will be described in detail below.

1 is a schematic configuration diagram of the present invention, wherein a function selection switch matrix section 4 and a remote control switch matrix section 5 for selectively connecting signals from a phono, tuner, auxiliary, and tape to an amplifier stage are provided in a deck section. (2) and the first switch unit (1) consisting of a key switch (S ₁ -S ₃ ) between the function selection switch matrix unit (4) and the deck unit (2) in interconnection with the remote control deck drive unit (3) -1) and the automatic switching circuit unit 1 are connected to each other.

FIG. 2 is a diagram illustrating a second phono (P), tuner (TR), and auxiliary (A) terminals of the selector switch matrix M ¹ through a first switch unit 1-1 including key switches S ₁ -S ₃ . It is connected to the collector terminals of the transistors T ₁ and T ₂ of the switch unit 1-2, and the tape signal terminal TP of the selection switch matrix M ₁ is connected to the transistors of the second switching unit 1-2. T ₃ and T ₄ are connected to the power supply terminal Vcc through the collector terminal and resistor R, and the base terminals of the transistors T ₂ and T ₃ are connected in parallel to the reverse stop unit 1-3. The output terminal of the AND gate A of the controller 1-4 is connected via the diodes D ₁ and D ₂ .

Further, the transistor (T ₁₎ of the base terminal, the control unit (1-4) connected to the output terminal of the NAND gate (N), and the transistor (T _4), one input terminal and the base of the deck is of the AND gate (A) portion of (2) commonly connected to a switch (S ₅₎ of the play signal input terminal (PL) and the third switch (1-5), the other input terminal of the aND gate (a) is the one and the input terminal of the NAND gate (N) of 3 Connect the switch (S ₄ ) of the switch unit (1-5) and the recording signal input terminal (REC) of the deck unit (2), and the type force terminal of the NAND gate (N) by connecting the power supply terminal (B ⁺ ). will be.

Reference numerals A _{1 to} A ₄ are analog switches, and Pi, TRi, PTi and Ai are output signals from the phono, tuner, tape deck and auxiliary signal stages, respectively.

Referring to the operation and effects of the present invention configured as described above are as follows.

The switch S _{5 of} FIG. 2 is a switch connected when the play key of the tape deck is pressed, and the switch S ₄ is a switch connected when the record key is pressed, and these switches S ₄ and S ₅ are simultaneously It cannot be connected.

On the other hand, in the initial state in which the cassette deck key is not operated, the switches S ₄ .S ₅ are turned off, respectively, so that the logic level of the two inputs of the AND gate A becomes "1", and the logic of the output end thereof is level "1" is a transistor (T _2, T ₃₎ is applied, so the transistor (T _2, T ₃₎ are each logic level "0" of the collector end of the base. Accordingly, the tape signal stage TP of the select switch matrix M ₁ that is operated in a high active state becomes low level and the cassette player is not operated, and the select switch matrix that is operated in a low active state. of (M ₁₎ phono (P), a tuner (TR) and secondary (a) only, each key switch (S _1, S ₃₎ by operating the main surface by applying a low level, the selection switch matrix (M ₁₎ of Each analog switch (A ₁ , A ₂ , A ₄ ) is activated by each output (O ₁ , O ₂ , O ₄ ) and the signal of each part selected, that is, phono (Pi), tuner (TRi) or demodulation (Ai). The output signal from the stage is applied to the amplifier input terminal of the sound equipment.

On the other hand, when the PLAY key of the cassette deck is pressed, the switch S ₅ is turned on so that the play signal input terminal PL of the deck unit 2 and the one input terminal of the transistor T ₄ and the AND gate A are turned on. Logic level "0" is applied. Therefore, a low level is input to the terminal PL of the deck portion 2 which is operated in the low active state, and the transistor T ₃ is applied to the tape signal terminal TP of the selection switch matrix M ₁ which is operated in the high active state. Since the high level by turning off T ₄ ) is input, the signal recorded on the cassette tape by the analog switch A ₃ operated at the high level output of the output terminal O ₃ of the selection switch matrix M ₁ . (TPi) is to be reproduced by the cassette player and the amplifier.

In addition, when the record (REC) key of the cassette deck is pressed, the switch S ₄ is turned on, and the input signal of the AND gate A and the NAND gate N and the recording signal input terminal REC of the deck unit 2 are turned on. Logic level "0" is applied. Accordingly, a low level is applied to the terminal REC of the deck portion 2 that is operated in a low active state, and the transistor T ₄ is turned on so that the tape signal terminal TP of the selection switch matrix M ₁ is low level. Therefore, tape recording is possible by the output of the selector switch matrix section 4 and the output of the deck section 2, and at this time, the output of the NAND gate N becomes the logic level “1” and the transistor T ₁ . Since is turned on, the level of the phono (P), tuner (TR) or auxiliary (A) stage of the selection switch matrix (M ₁ ) selected by each of the key switches (S ₁ -S ₃ ) is determined, and each terminal ( The phono stage output signal Pi, the tuner stage output signal TRi, or the auxiliary stage output signal Ai determined according to the levels of P, TR, and A are each analog switches A ₁ , A ₂ or A ₄ . By inputting into the recording signal of the deck part 2, these input signals are recorded on a tape.

When the cassette deck function in the audio device is used, the present invention can automatically select the amplifier of the audio player by a single operation (one-touch) such as the deck's play key or the record key. By playing and recording, there is an advantageous feature that the convenience of using the product is enhanced.

Claims (1)

(Correction) Recording and playback switches S ₄ and S at the input terminals of the AND gate A and the NAND gate N, the respective terminals REC and PL of the deck unit 2 and the base of the transistor T ₄ . ₅₎ the connection, and an output terminal of the NAND gate (N) output stage transistor (T _1), the aND gate (a) to the base of the transistor (T _2, and connected to the base of T _3), the gongjeop transistor (T ₁ , T ₂ ) is connected to each terminal P, TR, A of the switch matrix section 4 through each selector switch S _1- S ₃ , and the transistors T ₃ , T ₄ of the common transistor are connected. An automatic selection device of a functional button for a sound device, characterized in that the collector is connected to a power supply terminal (Vcc) and a terminal (TP) of the switch matrix unit (4).