KR900002118B1 - Melody control circuit for the doll - Google Patents

Abstract

The controller detects a baby cry and then transmits lullaby which is iterated and gradually diminished. The controller includes a sound signal breaker (6) preventing the re-detection of sound signal when controller is operated by an initial sound signal, a volumn control signal generator (9) generating a falling stepwave form signal so that the current flowing to a speaker through a current amplifier (10) is gradually diminished during a set time, and a reset signal generator (11) comprising an one shot circuit (17) resetting a first switch driver (8) and the volumn control signal generator (9) when an initial power is applied, and a fourth flip flop (18) for adjusting the melody time.

Description

Toy melody control circuit

1 is a schematic diagram of the present invention.

2 is a circuit diagram of one preferred embodiment in accordance with the inventive arrangements.

3 is a time waveform diagram of each part of FIG.

4 is a view showing an embodiment in which the present invention is applied to a stuffed bear doll.

* Explanation of symbols for main parts of the drawings

1: power supply part 2: first switch part

3: melody IC 4: first amplifier

5: Condenser microphone 6: Voice signal cutoff part

7: second amplifier

8: first switch driver (first flip-flop)

9: Volume control signal generator 10: Current amplifier

11: reset signal generator 12: second switch

13: second switch driver 14: clock generator

15, 16, 18: 2nd, 3rd, 4th flip-flop 17: One shot circuit

a, b, c, d: connection point SP: speaker

The present invention relates to a melody control circuit for toys, and more particularly, to a melody control circuit for toys that can be controlled so that the melody is gradually output as the lullabie melody is repeatedly output in response to the cry of the infant.

In the past, melodic ICs were operated in response to various switching methods, and the lullabie melodies were repeatedly output. However, they are repeatedly outputted with the same accent for a predetermined time. Not only was it awakening noise, it was boring to the listeners around it, causing fear of rejection. In addition, when the infant was asleep by the early lullabie melody, because the output is repeatedly output in the same stress until the set time has passed, there was a lot of power consumption, there was a need to replace the battery frequently.

An object of the present invention is to provide a current amplifier, a volume control signal generator, a reset signal generator and a voice signal cut-off unit to solve the problems of the prior art by the magnetic field melody is repeatedly outputted but gradually weakened as the repeated output. To provide a toy melody control circuit that can be controlled to be output.

Another object of the present invention is to provide a toy melody circuit with low power consumption.

In order to achieve the object of the present invention as described above, the configuration of the present invention is a toy melody circuit including a power supply unit, a first switch unit, a melody IC, a first amplifier and a speaker, wherein the first switch unit is sensitive to a voice signal. The condenser microphone, the audio signal blocking unit, the second amplifier, and the first switch driving unit are sequentially connected to the control signal input terminal of the first switch unit so as to be switched, and the control signal input terminal of the audio signal blocking unit is connected to the output terminal of the first switch unit.

In addition, a volume control signal generator is connected to an output terminal of the first switch unit, and an output terminal of the volume control signal generator is connected to a current amplifier, and the current amplifier is interposed between the power supply unit and a speaker to connect the first switch driver and the volume control signal. Each input terminal of the reset signal generator connected to the reset input terminal of the generator is connected to the output terminals of the power supply unit and the volume control signal generator.

One preferred embodiment according to the configuration of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic diagram of the present invention, and FIG. 2 is a circuit diagram of one preferred embodiment of the present invention.

With a power supply 1 consisting of a battery (B ⁺ ), a power switch (SW), a diode (D ₃ ) (D ₄ ) and a capacitor (C ₅ ), and a transistor (TR ₃ ) (TR ₄ ) connected in a Darlington pair a first switch (2), and a melody IC (3), a resistance (R ₁₆₎ and a transistor according to a melody circuit having a first amplifier (4) to (TR _7), and a speaker (SP) In order to turn on / off the transistors TR ₃ (TR ₄ ) connected to the Darlington pair of the first switch unit 2 in response to the voice signal, the voice signal is received by the condenser microphone 5 and the transistor ( TR ₁ ) A second amplifier 7 of (TR ₂ ) outputs amplified by two stages and waveform shaping, and according to the output signal, the first switch driver 8 of the first flip-flop (FF ₁ ) is set. The transistor TR ₃ (TR ₄ ) is controlled to be controlled by the output signal of the positive output terminal Q of the first flip-flop FF ₁ . In addition, after a signal appears at the output terminal (b) of the first switch (2), a transistor having an emitter grounded at the output terminal (a) of the condenser microphone (5) to prevent the sound insulation signal from being input as described above. 2 but connected to the second switch unit 12, the collector connection of the TR ₈₎ with a condenser (C ₁₀₎ connected via a diode (D ₁₎ to an output (b) of the first switch (2) The switch driver 13 is connected to the base of the transistor TR ₈ via a resistor 18.

The speaker SP is connected to receive current from the power supply unit 1 through a current amplifier 10 including transistors TR ₅ and TR ₆ , which are Darlington pairs, and the current amplifier 10 is connected to a speaker SP. The output stage (d) of the volume control signal generator 9 to be described later to control the amount of current supplied from the power supply unit 1 to the speaker SP so that the melody output through the repeating output is gradually weakened output It is connected to the base end of the transistor TR ₅ .

The volume control signal generator 9 includes a force generator 14, a second flip-flop FF ₂ , a third flip-flop FF ₃ , a diode D ₂ , and a resistor R ₁₂ -R ₁₅ . And outputs the falling staircase wave signal to the output terminal d for the set time.

The reset signal generator 11 for resetting the volume control signal generator 9 and the first switch driver 8 when the initial power is applied and when the repetitive performance of the set melody is completed is a resistance (R _8). ) And a one shot circuit 17 made of a capacitor C ₄ , a capacitor C ₆ , and a fourth flip-flop 18.

As shown in FIG. 4, a printed circuit board having the same circuit as that of FIG. 2 and a case 20 having a battery B ⁺ and a speaker SP are inserted into the face of a bear doll, and the power switch SW is turned on. A switch strap 21 for turning on / off extends out through the neck. Unmarked TR ₁ -TR ₈ are transistors, FF ₁ -FF4 are flip-flops, D ₁ -D ₄ are diodes, C ₁ -C ₁₀ are capacitors, and R ₁ -R ₁₀ are resistors.

The operation and effect of the configuration according to the present invention will be described with reference to FIGS. 3 and 4. Turn on the teddy bear's melody device, like the 4th tile, and place it near the infant. At the same time as the power switch SW is turned on, the same pulse as that at the time t ₀ of FIG. 3b is output from the win-shot circuit so that the first, second, third and fourth flip-flops FF ₁ -FF ₄ are returned. Is set.

In this way, letting the bear the melody device while power is embedded near the infant an infant in a condenser microphone (5) described above in the case teoteurineun crying receiving a call of infants, and the third the time t ₁ of d The received voice signal as in A is amplified and shaped in a second amplifier 7 of transistors TR ₁ (TR ₂ ) through a coupling capacitor C ₂ , and then the pulse signal coupling capacitor C of FIG. 3 e. ₃ ) is applied to the set terminal S of the first flip-flop FF ₁ . The positive output terminal Q of the first flip-flop FF ₁ is switched to a high level state, and this high level signal is transmitted to the base terminal of the transistor TR ₃ of the first switch unit 2 through the resistor R ₇ . The first switch unit 2 is switched on and the emitter stage b of the transistor TR ₄ is turned into a high level state.

As soon as the emitter stage b becomes high, this high level signal charges the capacitor C ₁₀ via the diode D ₁ , and the voltage across the capacitor C ₁₀ passes through the resistor R ₁₈ . Turn on (TR ₈ ). Therefore, the connection point a, which is the collector end of the transistor TR ₈ , becomes a ground state after time t _{1 in} FIG. 3C, thereby bypassing the subsequent audio signal received through the condenser microphone 5. As shown in FIG. In addition, the high level signal of the emitter stage b is input to the base stage d of the transistor TR ₅ of the current amplifier 10 through the diode D ₂ and the resistor R ₁₂ . 14). The clock generator 14 outputs a square wave of FIG. 3 ｈ determined by the resistors R ₁₀ (R ₁₁ ) and the capacitor C ₇ .

The frequency f of the square wave is

Is determined.

가 데이타단자(D)에 접속되어 그 정출력단자(Q)에서는 클럭단자(CK)에 입력되는 주파수의 1/2주파수인 제 3 도 자의 구형파를 출력하고 이 구형파는 저항(R₁₄)를 통하여 상기 베이스단(d)에 입력되고 또한 제 3 플립플롭(FF₃)의 클럭단자(CK)에도 입력된다. 마찬가지로 제 2 플립플롭(FF₂)에서는 상기 클럭발생기(14)의 구형파주파수 f의 1/4주파수인 제 3 도차의 구형파를 출력하며, 이 구형파는 저항(R₁₅)을 통하여 상기 베이스단(d)에 입력되고 또한 리세트신호발생부(11)의 제 4 플립플롭(FF₄)의 클럭단자(CK)에 입력된다.The square wave output having such a frequency is input to the base terminal d through the resistor R ₁₃ and also to the clock terminal CK of the second flip-flop FF ₂ . The second flip-flop FF ₂ is a negative output terminal

Is connected to the data terminal (D), and the constant output terminal (Q) outputs a square wave of a third conductor, which is 1/2 frequency of the frequency input to the clock terminal (CK), and the square wave is transmitted through a resistor (R ₁₄ ). It is input to the base terminal d and also to the clock terminal CK of the third flip-flop FF ₃ . Similarly, the second flip-flop FF ₂ outputs a square wave of the third order, which is a quarter frequency of the square wave frequency f of the clock generator 14, and the square wave is the base end d through the resistor R ₁₅ . ) Is input to the clock terminal CK of the fourth flip-flop FF ₄ of the reset signal generator 11.

In the base stage (d), the output of the output terminal (b) of the first switch unit 2, the output of the output terminal (3) of the clock generator 14, the positive output of the second flip-flop (FF ₂ ) and the first The output Vd in which the positive output of 3 flip-flops (FF ₃ ) is synthesized

V _d = V _b + V ₃ + VQ ₂ + VQ ₃

Is determined. For example, if V _b = 5V, V ₃ = 4V, VQ ₂ = 2V, VQ ₃ = 1V

V _d = 5 + 4 + 2 + 1 = 12 in period P ₁

V _d = 5 + 4 + 2 + 0 = 11 in period P ₂

V _d = 5 + 4 + 0 + 1 = 10 in period P ₃

V _d = 5 + 4 + 0 + 0 = 9 in period P ₄

V _d = 5 + 0 + 2 + 1 = 8 in period P ₅

V _d = 5 + 0 + 2 + 0 = 7 in period P ₆

V _d = 5 + 0 + 0 + 1 = 6 in period P ₇

V _d = 5 + 0 + 0 + 0 = 5 in period P ₈

In this manner, during the period T, the falling staging wave of FIG. 3d is applied to the base terminal d of the transistor TR ₅ of the current amplifier 10. Therefore, the current amplifier 10 gradually reduces the amount of current supplied to the speaker SP.

At the time t ₁ described above, the melody IC 3 is excited by the high level signal of the emitter stage b of the transistor TR ₄ of the first switch section 2 and is output from the output stage 3. The melody of FIG. M is applied to the transistor TR ₇ through the resistor R ₁₆ , amplified according to the current amplifier 10 described above, and output through the speaker SP. For example, if the signal duration (T) of the staircase waveform is about 7 minutes, when one melody is played for 30 seconds, pauses for 5 seconds, and repeats again, 12 songs are gradually weakened and repeated.

에 하이레벨신호가 상기 클럭발생기(14)의 주파수F의 1/8주파수로 출력된다. 상기 부출력단

의 하이레벨신호는 콘덴서(C₆)를 통해서 제 1, 제 2, 제 3 및 제 4 플립플롭(FF₁- FF₄)의 리세트 단자에 인가되어 리세트시키므로 제 1 플립플롭(FF₁)에 의하여 제 1 스위치부(2)가 도통상태에서 차단상태로 되어 그 출력단(b)에 접속된 멜로디IC(3), 음량제어신호발생부(9) 및 음성신호차단부(6)에는 전원인가가 차단된다. 음성신호차단부(6)의 콘덴서(C₁₀)는 저항(R₁₈)을 통하여 방전되어 트랜지스터(TR₈)는 차단상태로 되고 접속점(a)은 제 3 도 c의 시간t₂에서 하이레벨상태로 전환되어 음성신호를 감응할 수 있는 상태로 유지된다.As described above, the repetitive performance becomes gradually weakened gradually during the set time (t ₁ -t ₂ ), and then the negative output terminal of the fourth flip-flop FF ₄ at time t ₂ .

A high level signal is output at a frequency of 1 / 8th of the frequency F of the clock generator 14. The negative output stage

The high level signal of is applied to the reset terminals of the first, second, third and fourth flip-flops FF ₁ -FF ₄ through the capacitor C ₆ to reset the first flip-flop FF ₁ . The first switch unit 2 is cut off in the conduction state, and power is supplied to the melody IC 3, the volume control signal generator 9, and the audio signal cutoff unit 6 connected to the output terminal b. Is blocked. The capacitor C ₁₀ of the voice signal interrupting unit 6 is discharged through the resistor R ₁₈ so that the transistor TR ₈ is turned off and the connection point a is at a high level at time t ₂ in FIG. Is switched to and remains in a state capable of responding to a voice signal.

Therefore, in response to a subsequent voice signal, the same operation as described above is repeated while gradually weakening the melody.

As described above, in the present invention, the lullabie starts to play the melody in response to the crying of the infant and gradually weakens it over and over again for a set time, thereby remarkably increasing the effect of soothe and calm the crying infant. Power consumption is greatly reduced compared to the melody device in which the accent is constantly repeated, so that the inconvenience and waste of frequent replacement of the battery (B ⁺ ) can be obtained.

Although only specific embodiments of the invention have been described, various other changes and modifications can be made without departing from the scope of the invention as defined by the claims.

Claims (4)

In a toy melody circuit comprising a power supply unit 1, a first switch unit 2, a melody IC 3, a first amplifier 4, and a speaker SP, the first switch unit 2 is a voice. The condenser microphone 5, the audio signal interrupting unit 6, the second amplifier 7 and the first switch driver 8 are sequentially connected to the bare signal input terminal of the first switch unit 2 so as to be switched in response to a signal. The control signal input terminal of the voice signal blocking unit 6 is connected to the output terminal b of the first switch unit 2, and the volume control signal generation unit is connected to the output terminal b of the first switch unit 2. (9) is connected, and the connection point (d), which is an output terminal of the volume control signal generator (9), is connected to the current amplifier (10), but the current amplifier (10) is connected between the power supply unit (1) and the speaker (SP). Of the reset signal generator 11 connected via a reset input terminal of the first switch driver 8 and the volume control signal generator 9; Input, the melody control circuit for a toy, characterized in that in association with each connected to an output terminal of the power source unit 1 and the volume control signal generator (9). 2. The condenser microphone (5) and the second amplifier (7) according to claim 1, wherein the audio signal blocking unit (6) is adapted to respond to the first audio signal so as to prevent the melody control circuit operating in response to the sound insulating signal again. The second switch unit 12 is connected to each other, and the control signal input terminal of the second switch unit 12 is connected to the output terminal b of the first switch 2 through the second switch driver 13. Toy melody control circuit, characterized in that the. The volume control signal generator 9 generates a falling staircase waveform so that the current supplied from the power supply unit 1 through the current amplifier 10 to the speaker SP is gradually decreased during the set time. The clock generator 14, the second flip-flop 15, and the third flip-flop 16 are sequentially connected to the output terminal b of the first switch unit 2 to control the current amplifier 10 to be supplied. an output terminal (b) of the first switch (2), the connection point (d) of the control signal input terminal of the current amplifier (10) via a diode (D ₂₎ and a resistor (R _12), resistor (R _13), and Through the output terminal of the clock generator 14, the positive output terminal of the second flip-flop 15 through the resistor (R ₁₄ ), the constant output terminal of the third flip-flop 16 through the resistor (R ₁₅ ) Are connected in common, and the reset end of the second and third flip-flops 15 and 16 is connected to the output end of the reset signal generator 11. Melody control circuit for toys, characterized in that. The reset signal generator (11) according to claim 1, wherein the reset signal generator (11) includes a one shot circuit (17) for resetting the first switch driver (8) and the volume control signal generator (9) when initial power is applied; The fourth flip-flop 18 resets the first switch driver 8 and the volume control signal generator 9 in order to be able to respond to a subsequent voice signal at the same time that the melody is played for a set time. Toy melody control circuit characterized in that the configuration.

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