JP3444739B2 - Sounding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sounding device used for a music box, a chime, a mechanical clock, etc., and in particular, a predetermined sound color is generated by actually striking a sounding body forming a part of a percussion instrument with a hammer or the like. It relates to a sounding device.

[0002]

2. Description of the Related Art For example, a conventional sounding device disclosed in Japanese Patent Laid-Open No. 8-123423 will be described with reference to FIG. The conventional sounding device shown in FIG. 5 is provided with a plurality of hollow pipe-shaped sounding members 101 suspended in a substantially vertical direction and having different lengths, and corresponding to the sounding members 101. It is composed of a hammer mechanism 102 for generating a predetermined tone color. Each hammer mechanism 102 has a leaf spring 103 fixed at one end, and a hammer head 1 provided near the free end of the leaf spring 103.
04 and a solenoid type drive device for bending the leaf spring 103. In addition, the solenoid type drive device includes a fixed end of the leaf spring 104 and the hammer head 104.
A plunger 106 connected to an intermediate portion with a free end provided with a solenoid, a solenoid 107 for causing the plunger 106 to project substantially horizontally, a coil spring 108 for returning the projecting plunger 106, and the like. I have it.

The solenoid type drive device drives the solenoid 107 in response to a predetermined electric signal, and the plunger 10 is driven.
6 is projected to the leaf spring 103 side, and the hammer head 104 near the free end of the leaf spring 103 is made to collide with the sounding body 101. Further, in the coil spring 108, the hammer head 104 does not interfere with the vibration of the sounding body 101.
The plunger 106 is retracted almost at the same time when the vehicle collides with. In this way, a tone color unique to each sounding body 101 is sequentially generated, and a predetermined music piece is played.

[0004]

Generally, in one piece of music, by changing the strength of the sound, the music may be changed. In this case, the speed at which the hammer head 104 collides with the sounding body 101 is substantially proportional to the intensity (volume) of the sound generated by the collision. Therefore, in the above-described conventional example, the collision speed between the plunger 106 and the sounding body 101 can be changed by controlling the voltage applied to the solenoid 107.

However, in the above-mentioned conventional sounding device,
Coil spring 10 for retracting plunger 106
8, the tension of the coil spring 108 acts as a load, and the driving force of the solenoid 107 is applied to the coil spring 10.
The plunger 106 does not operate until the tension exceeds 8, and when the driving force of the solenoid 107 exceeds the tension of the coil spring 108, the plunger 106 starts operating. Further, since the plunger 106 moves in the direction of charging the coil spring 108, the load due to the tension of the coil spring 108 gradually increases, and even if the voltage applied to the solenoid 107 is constant, the operating speed of the plunger 106 is increased. Is not constant.

Further, since the solenoid 107 originally has a characteristic that its operation is not stable at a low voltage equal to or lower than the rated voltage, the solenoid 106 is driven while driving the plunger 106 while charging the coil spring 108. In the configuration, even if the voltage applied to the solenoid 107 is changed, the change in the speed of the plunger 106 is not proportional to the change in the voltage, and it is difficult to control the collision speed between the hammer head 104 and the sounding body 101. It was In particular, the impact speed of the hammer head 104 is slowed down, resulting in a weak sound (small sound).
It was practically impossible to stably generate.
As a result, the range of change in the strength of the sound becomes small, and the musical composition to be played becomes monotonous without the strength of the sound, and there is a problem that the listener feels unnatural.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a sounding device capable of expressing a variety of sounds by increasing the range of change in the strength and weakness of a sound with a simple structure. To provide.

[0008]

In order to achieve the above object, a sounding device of the present invention comprises a plurality of sounding bodies which generate different tone colors, and a plurality of sounding bodies which are provided corresponding to the plurality of sounding bodies. Arm, each of which is provided at one end of each of the plurality of arms, and which collides with the corresponding sounding body to generate a unique tone color of the sounding body; is fixed between the one end and the other end, depending on the polarity of the applied voltage, the corresponding said arm, retracting direction or the <br/> hammer head strikes the sound producing each said hammer head corresponding rotate the make direction, a plurality of rotary solenoids rotational speed varies depending on the state of application of the applied voltage, by adjusting the voltage applied to the row tally solenoid Wherein by changing the rotational speed of the rotary solenoid by changing the speed of colliding a hammerhead to the sounding body, and a volume control means for adjusting the volume of the tone in which the sounding body is emitted.

That is, according to the present invention, a rotary solenoid is used as a drive device for the volume control means, and the collision speed between the hammer head and the sounding body is controlled by changing the rotational speed of the rotary head. Therefore, it is possible to stabilize the speed of the hammer head at a low speed without using a member such as a coil spring in the conventional example that is a load on the motor.

In the above structure, the hammer head may be provided at one end of an arm substantially orthogonal to the axis of the rotary solenoid, and a balance weight may be provided at the other end of the arm. With such a configuration, the rotational moment of the rotary solenoid can be balanced and the operation can be stabilized.

[0011] In the above structure, it may be the vicinity of both ends of at least said arm in the elastic body, and the balance weight may be provided with a lingering stopper made of an elastic body. With such a configuration, it is possible to absorb the complicated movement of the hammer head due to the collision between the hammer head and the sounding body.

In each of the above configurations, a rectangular wave voltage may be applied to the rotary solenoid. In particular, the maximum voltage of the rectangular wave voltage is made higher than the rated voltage of the rotary solenoid, and the ratio of the time when the maximum voltage is applied and the time when no voltage is applied is changed, or the rectangle. The maximum voltage of the wave voltage is made higher than the rated voltage of the rotary solenoid, and the method of changing the maximum voltage value, or the maximum voltage of the rectangular wave voltage is made higher than the rated voltage of the rotary solenoid, It is preferable to control the effective voltage by any one of the methods of changing the maximum voltage value and the ratio of the time when the maximum voltage is applied and the time when the maximum voltage is not applied. As described above, the solenoid has such characteristics that when a voltage lower than the rated voltage is applied, variations in torque and the like are large and the operation stability is poor. However, since the effective voltage can be changed with the most stable voltage of the solenoid as the applied voltage by each of the above methods, the effective voltage should be lower than the rated voltage while the voltage applied to the rotary solenoid is higher than the rated voltage of the rotary solenoid. It is possible to stabilize the operation of the rotary solenoid at low speed. As a result, the sounding body can be stably sounded at a low (weak) volume, and the performance of the music by the sounding device can be varied.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a sounding device of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a configuration of an embodiment of a sounding device of the present invention, and FIGS. 2 (a) and 2 (b) are waveform diagrams showing an example of a voltage applied to a rotary solenoid.

As shown in FIG. 1, the sounding device of the present invention comprises:
A plurality of sounding bodies 1 each having a substantially cylindrical shape and having different lengths, and a hammer mechanism 2 provided as each sounding body 1 as a sound volume adjusting means for generating a unique tone color of each sounding body 1 at a predetermined sound volume. I have it. The hammer mechanism 2 includes a rotary solenoid 3 fixed to a frame (not shown) so that the rotary shaft 4 is substantially horizontal, and an elasticity fixed to the rotary shaft 4 so as to be substantially orthogonal to the rotary shaft 4. The arm 5 has a hammer head 6 fixed to one end of the arm 5, and a balance weight 7 fixed to the other end of the arm 5. The hammer mechanism 2 is positioned so that the arm 5 including the hammer head 6 and the balance weight 7 rotates in a plane passing through the central axis of the sounding body 1.

[0015] rotary solenoid 3 is stopped at a position where the arm 5 is substantially vertical state, rotating the arm 5 in a predetermined direction by applying a predetermined voltage. The hammer head 6 fixed to one end of the arm 5 is
The rotation of causes the side surface of the sounding body 1 to collide. Here, the output of the rotary solenoid 3, that is, the rotation speeds of the arm 5 and the hammer head 6 change according to the voltage applied to the rotary solenoid 3. The sounding body 1 generates a unique timbre at a volume corresponding to the collision speed or collision energy of the hammerhead 6. Since the arm 5 is a leaf spring-like elastic body, it is possible to absorb the complicated movement of the hammer head 6 when the hammer head 6 collides with the sounding body 1. Further, since the balance weight 7 is attached to the end of the arm 5 opposite to the hammer head 6, the moments can be balanced and the operation of the rotary solenoid 3 can be stabilized. Further, the balance weight may be provided with an afterglow stop made of an elastic body, whereby a better moving body can be realized.

Next, a control circuit including a volume adjusting system of the present sounding device will be described with reference to FIG. This control circuit 10 is, as shown in FIG.
1, a MIDI signal generator 12, a MIDI sound source 13, an amplifier 14, a speaker 15, a timer switch 16, and a drive circuit 17.

As a control signal for the sounding device of this embodiment,
For example, MIDI (Music Instrument)
MID of Digital Interface standard
I data is used. The MIDI data includes scale data and volume data. Which pronunciation body 1 is the scale data
The sound volume data is data relating to how loud the sounding body 1 is to be sounded, that is, data directly related to control of the sounding device.

This MIDI data is from 1 channel to 1
It has 6 channels and is stored in the MIDI signal generator 12. The MIDI signal generator 12 inputs the data of channels 1 to 15 to the MIDI sound source 13 ,
16 channels of data as channel data (channel number), sound body (Bosuzu) 1 of the scale data (node number) timing tone duration data (velocity), and has a function of inputting to the microcomputer 1 1.
The MIDI sound source 13 has a function of converting the data of channels 1 to 15 into an analog signal of background music.

In the sounding device of the present invention, the hammer head 6
The collision speed at the time of colliding with the sounding body 1 is changed, and the volume is changed according to the collision energy. Also,
As means for changing the collision speed of the hammer head 6,
The number of rotations of the rotary solenoid 3 is changed. Here, the relationship between the voltage applied to the rotary solenoid 3 in advance and the rotation speed of the rotary solenoid or the speed of the hammer head 6 can be obtained by experiments or the like.
Also, the relationship between the number of revolutions of the rotary solenoid 3 or the speed of the hammer head 6 and the volume of the sounding body 1 can be obtained by experiments or the like. Therefore, the relationship between the volume data included in the MIDI data and the voltage applied to the rotary solenoid 3 can be known in advance according to the type of motor used, the shape, size, and material of the sounding body 1.

However, the rotary solenoid 3
, When applied to a voltage less than the rated voltage, large variations in the torque, has a characteristic of poor operation stability. Therefore, when it is desired to reduce the volume of the sounding body 1 (make it weaker), the voltage applied to the rotary solenoid 3 is generally lowered. However, when the applied voltage is equal to or lower than the rated voltage, the hammer head 6 produces a sound. When the vehicle collides with the body 1 at a low speed, the variation in speed is large, and the sound volumes do not match.

Therefore, in order to stabilize the speed at which the hammer head 6 collides with the sounding body 1 at a low speed, in the present invention, for example, a rectangular wave voltage as shown in FIG. 2A or 2B is applied. . Effective voltage V of such rectangular wave voltage
_E is given by the following equation, where _E is the maximum voltage value of the rectangular wave voltage, T is the time of one pulse of the rectangular wave, and t is the time of application of the maximum voltage in one pulse of the rectangular wave.

[0022]

[Equation 1] V _E = E (t / T)

Therefore, assuming that the rated voltage of the rotary solenoid 3 is 12 V, for example, in the case shown in FIG. 2A, the maximum voltage E of the rectangular wave is 20 V, the time T of one pulse of the rectangular wave is T = 0.5 mS, and the pulse of the rectangular wave is 1 pulse. Since the time during which the maximum voltage is applied is t = 0.25 mS, V _E = 1
It becomes 0 (V). That is, a voltage lower than the rated voltage can be applied. In this case, the time T of one pulse of rectangular wave
The ratio of the time t during which the maximum voltage is applied, that is, the duty ratio is 0.25 / 0.5 = 50%.

On the other hand, when the hammer head 6 collides with the sounding body 1 at a high speed, a rectangular wave voltage may be similarly applied. In this case, the effective voltage can be changed by changing the duty ratio without changing the maximum voltage of the rectangular wave. For example, in the case shown in FIG. 2B, similarly, when the rated voltage of the rotary solenoid 3 is 12 V, the maximum voltage E of the rectangular wave E = 20 V, the time T of one pulse of the rectangular wave T = 0.5 mS, Since the time t = 0.4 mS during which the maximum voltage is applied, V _E = 16
(V). The duty ratio is 0.4 / 0.5
= 80%.

In this way, regardless of whether the voltage applied to the rotary solenoid 3 is higher or lower than the rated voltage, by applying the rectangular wave voltage, the collision speed between the hammer head 6 and the sounding body 1 is low. Not only is the collision speed stabilized, but the control circuit can be simplified. That is, for example, a constant voltage circuit that outputs the maximum voltage of a rectangular wave voltage is used as the power supply, and a microcomputer or the like is used as the control circuit. Then, the drive circuit is turned on / off at a high speed by using a clock built in the microcomputer. Further, a desired effective voltage can be obtained by arbitrarily setting the on / off time of the drive circuit, that is, the duty ratio.

The operation of one embodiment of the sounding device of the present invention configured as above will be described. For example, at a predetermined time, the switch 16 is set to the ON state, the device is set to the MIDI signal receiving mode, and the activation signal is input to the MIDI signal generator 12 from the output terminal t2 of the microcomputer 11. On the other hand, the MIDI signal generator 12 is activated by the activation signal from the microcomputer 11.
From MID over 1 to 16 channels
The I signal is output. And one of the MIDI signals
Data from channel 15 to channel 15 is MIDI sound source 1
3 and is converted into a music analog signal of the background music input by the MIDI sound source 13, and the converted music analog signal is amplified by the amplifier 13 and the speaker 14
And the background music is output from the speaker 14.

The 16-channel data output from the MIDI signal generator 12 is transferred to the microcomputer 11
Is input to the 16-channel MIDI data, the tone generator 1 of the scale to be generated is selected, and a clock signal for turning on / off the drive circuit 17 is output at a predetermined timing based on the volume data. Drive circuit 17
Then, a rectangular wave voltage having a predetermined duty ratio is output based on the clock signal. Then, the rotary solenoid 3 rotates at a speed according to the effective voltage of the applied rectangular wave voltage, and the hammer head 6 collides with the sounding body 1 at a speed according to the rotation speed of the rotary solenoid 3. The sounding body 1 emits a tone color of a predetermined scale at a volume corresponding to a collision speed or a collision energy with the hammerhead 6.

Since the time until the hammer head 6 collides with the sounding body 1 after the activation of the rotary solenoid 3 can be known in advance, the application time of the rectangular wave voltage to the rotary solenoid 3 can be set in advance. When the set time has elapsed, the energization of the rotary solenoid 3 is cut off, a voltage having a reverse polarity is applied to the rotary solenoid 3, and the hammer head 6 is moved away from the sounding body 1. In this case, since it is necessary to move the hammer head 6 backward at a high speed, the voltage applied to the rotary solenoid 3 does not have to be a rectangular wave voltage, and its voltage value may be constant.

FIG. 4 shows an experiment in which the duty ratio of the applied voltage was not changed using the four samples (FIG. 4A) and the duty ratio of the effective voltage was changed (FIG. 4B). It is a figure which shows a result. In FIG. 4A, the horizontal axis represents the applied voltage and the vertical axis represents the sound volume. In FIG. 4B, the horizontal axis represents the duty of the applied voltage (voltage duty).
And the vertical axis represents the volume. As you can see from Figure 4,
When the duty ratio of the applied voltage is not changed, the rated voltage is 12 V, but when the rated voltage is lower than the rated value, the volume fluctuation is large and the operation is weak and unstable. In addition, there is a large variation above the rating, but a stable voltage range (stable voltage 17V)
There is. When the effective voltage is controlled by the rectangular pulse of this voltage, there is little variation in volume as shown in FIG. 4 (b).

In the above embodiment, in order to change the effective voltage of the rotary solenoid 3, the maximum voltage value of the applied rectangular wave voltage is fixed and the duty ratio is changed. The effective voltage of the rotary solenoid 3 can be changed in the same manner by fixing the above and changing the maximum voltage value of the applied rectangular wave voltage. Further, both the maximum voltage value of the applied rectangular wave voltage and the duty ratio may be changed.

Further, in the above embodiment, the sounding body 1 has a substantially cylindrical shape. However, the sounding body 1 is not limited to this, and a plate-shaped body,
The same effect can be obtained even with a rod-shaped body or the like. Sounder 1
The material may be any material used for musical instruments such as metal and wood.

[0032]

As described above, according to the present invention, the sounding body can be sounded at an arbitrary volume, the musical composition to be played can be changed, and monotonousness can be eliminated. Also,
The maximum voltage value of the rectangular wave applied to the rotary solenoid is set higher than the rated voltage of the rotary solenoid, and the effective voltage below the rated voltage can be obtained by changing the duty ratio. The collision speed can be stabilized, and the volume of the sounding body can be stabilized at a small (weak) level.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a sounding device of the present invention.

FIG. 2A is a diagram showing a rectangular wave voltage for obtaining an effective voltage equal to or lower than a rated voltage of a rotary solenoid,
(B) is a diagram showing a rectangular wave voltage for obtaining an effective voltage equal to or higher than the rated voltage of the rotary solenoid.

FIG. 3 is a diagram showing a configuration example of a control circuit of a volume adjusting system of the present sounding device.

FIG. 4 is a diagram showing experimental results when four samples are used. (A) shows the case where the duty ratio of the applied voltage is not changed, and (b) shows the case where the duty ratio of the effective voltage is changed ( It is a figure which shows a result.

FIG. 5 is a perspective view showing a configuration of a conventional sounding device.

[Explanation of symbols]

1 ... Sound generator 2 ... Hammer mechanism 3 ... Rotary solenoid 4 ... Rotary axis 5 ... Arm 6 ... Hammerhead 7 ... Balance weight

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Claims (4)

(57) [Claims] 1. A plurality of sounding bodies that generate different tones, a plurality of arms respectively provided corresponding to the plurality of sounding bodies, and a plurality of arms respectively provided at one end of the plurality of arms and corresponding to each of the plurality of sounding bodies. A plurality of hammerheads that generate a unique tone color of the sounding body by colliding with the sounding body, and rotation axes of the hammerheads are fixed between one end and the other end of the plurality of arms, respectively, depending on the polarity of the applied voltage. Te, the arm corresponding retraction respectively the hammer direction or the hammer head strikes the sound producing head corresponding of
To rotate in a direction, a plurality of rotary solenoids rotational speed varies depending on the state of application of the applied voltage, by adjusting the voltage applied to the row tally solenoid,
A sound producing device comprising: a sound volume adjusting means for changing the speed at which the hammer head collides with the sounding body by changing the rotation speed of the rotary solenoid, and adjusting the sound volume of the tone color emitted by the sounding body. 2. The sounding device according to claim 1, wherein the hammer head is provided at one end of an arm substantially orthogonal to the axis of the rotary solenoid, and a balance weight is provided at the other end of the arm. 3. The sounding device according to claim 2, wherein at least the vicinity of both ends of the arm is elastic, and the balance weight is provided with a finish stop made of an elastic body. 4. The volume adjusting means applies a rectangular wave voltage having a maximum voltage higher than a rated voltage of the rotary solenoid to the rotary solenoid, and applies a time and voltage for applying the maximum voltage. 4. The sound producing device according to claim 1, wherein the effective voltage is controlled by changing the ratio of the non-operating time.