JP2564708B2 - Movable body drive control circuit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control circuit for controlling the movement of a movable body attached to a timepiece or the like.

[0002]

2. Description of the Related Art Heretofore, there has been a system in which a synthetic sound representing a voice of an animal is generated and a movable body such as a model of an animal is moved in response to the synthesized sound so as to appeal to the sight as well as the hearing. For example, it is like a clock in which a model of a bird is made to move according to the sound of a synthesized bird.

[0003]

However, the conventional device has a problem that the circuit scale increases because the signal source of the synthetic sound and the signal source of the movable body are separate.

An object of the present invention is to reduce the circuit scale by sharing a signal source for acoustic output and a signal source for a movable body.

[0005]

Means for Solving the Problems of the movable body in the present invention
The drive control circuit is an acoustic signal generation circuit that generates an acoustic signal.
And the first drive for driving the speaker based on the above acoustic signal
Circuit and the supply amount of the acoustic signal to the first drive circuit
First control circuit for controlling, and output signal of the first drive circuit
To the amplification signal from the amplification circuit and the above amplification circuit
A second drive circuit for driving a movable body based on the above, and the first control
Circuit supplies the acoustic signal to the first drive circuit
Increase the amplification factor of the above amplification circuit when
By increasing the output signal of the second drive circuit
And a second control circuit.

[0006]

FIG. 1 is an electric circuit diagram showing an embodiment.
The present embodiment relates to a clock, in which a bird model (movable body) moves in accordance with a synthetic sound that represents the sound of a bird.

The acoustic signal generation circuit SS is a storage circuit (ROM or the like) for storing digital data corresponding to the sound of birds,
It is composed of a D / A conversion circuit for D / A converting this digital data, and outputs an acoustic signal corresponding to the sound of birds. The speaker SP produces a synthetic sound of a bird's sound based on the acoustic signal output from the acoustic signal generation circuit SS. The movable body MV is configured such that the bird model moves by the attraction / repulsion action that acts between the movable body MV and the electromagnet MG. R1 to R7 are resistors, C1 to C3 are capacitors, and D1 is a diode. T1 to T3 are transistors. The transistor T1 constitutes a first drive circuit and the transistor T3 constitutes a second drive circuit. S1 and S2 are manual interlocking switches.

Next, the operation of the embodiment shown in FIG. 1 will be described.

Time is hour (1:00, 2:00, ..., 12:00)
Then, a signal to that effect is input to the acoustic signal generation circuit SS. In the acoustic signal generation circuit SS, digital data corresponding to the sound of birds is D / A converted and output as an acoustic signal. Then, the speaker SP outputs a synthetic sound representing the sound of a bird, and the movable body M is operated by the action of the electromagnet MG.
V moves. At this time, when the positions of the interlocking switches S1 and S2 are a1 and a2, respectively (hereinafter referred to as "loud volume mode"), the volume output from the speaker SP is high, and the interlocking switches S1 and S2 are The positions of S2 are b1 and b, respectively.
When it is 2 (hereinafter, referred to as "small volume mode"), the volume output from the speaker SP is low. On the other hand, the magnitude of the movement of the movable body MV is substantially constant regardless of the positions of the interlocking switches S1 and S2.

The operation will be described below in detail in the case of the high volume mode and the case of the low volume mode.

The operation in the high volume mode is as follows. The acoustic signal output from the acoustic signal generation circuit SS is input to the base of the transistor T1 through the parallel circuit of the resistors R1 and R2. Therefore, a relatively large current flows through the base of the transistor T1 as compared with the low volume mode, and a relatively large current flows through the speaker SP through the transistor T1. As a result, Speaker S
A relatively loud sound output is generated from P. A part of the speaker drive current (speaker drive signal) flowing through the speaker SP becomes the base current of the transistor T2 through the resistor R3. This speaker drive signal is amplified by the Darlington-connected transistors T2 and T3, and finally becomes a movable body drive current (movable body drive signal) flowing through the electromagnet MG. Then, the movable body MV mechanically operates by the attraction / repulsion action of the electromagnet MG based on the movable body drive current.

The operation in the low volume mode is as follows. The acoustic signal output from the acoustic signal generation circuit SS is input to the base of the transistor T1 through the resistor R1. Therefore, a relatively small current flows through the base of the transistor T1 as compared with the loud sound mode, and a relatively small current flows through the speaker SP through the transistor T1. As a result, a relatively low volume sound output is produced from the speaker SP. Part of the speaker drive current (speaker drive signal) flowing through the speaker SP becomes the base current of the transistor T2 through the parallel circuit of the resistors R3 and R4. Therefore, a relatively larger amount of current flows through the base of the transistor T2 than when the resistor R4 is not connected. Therefore, the resistors R1, R2, R3 and R
By appropriately selecting the value of 4, the transistor T2
It is possible to apply the same current to the bass as in the case of high volume mode. The operation after the transistor T2 is the same as in the case of the large volume mode.

As is clear from the above description, the magnitude of movement of the movable body MV can be made equal in both the high volume mode and the low volume mode. Of course, the magnitude of the movement of the movable body MV in both modes does not necessarily have to be constant, and for example, the movement in the low volume mode may be larger than in the high volume mode. May be.

[0014]

According to the present invention, the first drive for driving the speaker
When the amount of acoustic signals supplied to the dynamic circuit is limited
Is an amplifier circuit for amplifying the output signal of the first drive circuit.
By increasing the frequency,
Increase the output signal of the second drive circuit that drives the movable body based on
I decided to do it. Therefore, for example, to the first drive circuit
Output of the second drive circuit regardless of the amount of audio signal supplied.
First drive circuit capable of holding force signal constant
To the output of the second drive circuit compared to the fluctuation of the supply amount of the acoustic signal to
It is possible to suppress the fluctuation of the force signal.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of the present invention.

[Explanation of Codes] SS ... Acoustic signal generating circuit SP ... Speaker T1 ... First driving circuit MV ... Movable body T3 ... Second driving circuit

Claims (1)

(57) [Claims] 1. A sound signal generation circuit for generating a sound signal, and a first drive circuit for driving a speaker based on the sound signal.
And controlling the supply amount of the acoustic signal to the first drive circuit.
A first control circuit, an amplifier circuit that amplifies the output signal of the first drive circuit, and a movable body is driven based on the amplified signal from the amplifier circuit.
The second drive circuit and the first control circuit cause the first drive time of the acoustic signal.
If the amount of supply to the road is limited, increase the amplification circuit above.
The output signal of the second drive circuit is increased by increasing the width.
Drive control of a movable body comprising a second control circuit for increasing the number of signals
Your circuit.