JP3648034B2 - Karakuri Clock Sounding Device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sound generating device used for music boxes, chimes, a clockwork clock, and the like, and more particularly to a sound generating device that generates a unique tone color by hitting a sound generator constituting a percussion instrument with a hammer or the like.
[0002]
[Prior art]
For example, a conventional sounding device disclosed in Japanese Patent Laid-Open No. 8-123423 will be described with reference to FIG. FIG. 9 is a perspective view showing a configuration of a conventional sounding device. The conventional sounding device shown in FIG. 9 is suspended substantially vertically, provided with a plurality of hollow pipe-like sounding bodies 101 each having a different length, and corresponding to the sounding body 101, and the sounding body 101 is actually hit. The hammer device 102 is configured to generate a unique tone color.
[0003]
The hammer device 102 includes a leaf spring 103 with one end fixed, a hammer head 104 provided in the vicinity of the free end of the leaf spring 103, and a solenoid type driving device for deflecting the leaf spring 103.
Further, the solenoid type driving device includes a plunger 106 connected in the vicinity of an intermediate portion between the fixed end of the leaf spring 103 and the free end provided with the hammer head 104, and a solenoid 107 for projecting the plunger 106 in a substantially horizontal direction. And a coil spring 108 for returning the protruded plunger 106 to its original position.
[0004]
When a predetermined electrical signal is input, the solenoid type driving device drives the solenoid 107 to cause the plunger 106 to protrude toward the leaf spring 103 side. When the plunger 106 is protruded, the hammer head 104 provided in the vicinity of the free end of the leaf spring 103 collides with the sounding body 101, and a sound unique to the sounding body 101 is generated. Immediately after the hammer head 104 collides with the sounding body, the plunger 106 is retracted by the coil spring 108 so that the vibration of the sounding body 101 is not hindered.
By repeating the operations described above, a predetermined music piece is played.
[0005]
Further, there is a case where expressive power is given to a piece of music by giving each musical scale a strength. For the sounding device described above, the fact that the collision speed of the hammer head 104 with the sounding body 101 and the volume (volume) of the sound generated by the collision of the hammer head 104 is approximately proportional to the sound intensity. Is attached. That is, if the voltage applied to the solenoid 107 is controlled, the operating speed of the plunger 106 changes, and the collision speed with the sounding body 101 changes accordingly.
[0006]
[Problems to be solved by the invention]
The solenoid 107 has a tendency that the value of the internal resistance in the solenoid 107 varies greatly depending on the ambient temperature. That is, the operation of the solenoid 107 is easily influenced by the ambient temperature. For example, in a cold state, the internal resistance of the solenoid 107 decreases, so that the solenoid 107 operates more than a predetermined operation. As a result, the plunger 106 can push the leaf spring 103 strongly, and the hammer head 104 strongly collides with the sounding body 101 accordingly. Therefore, a case where the middle sound changes to a strong sound can be considered.
[0007]
Further, for example, in a high temperature state, the internal resistance of the solenoid 107 increases, so that the solenoid 107 cannot perform a predetermined operation. Thereby, the plunger 106 cannot push out the leaf | plate spring 103 strongly, and the case where a weak sound is not sounded also arises.
[0008]
Therefore, in the conventional sound producing device, the place where it is used is limited to indoors, etc., and the current situation is that the sound cannot be changed in intensity.
In other words, the performance of the music became monotonous with little change in strength, and could not satisfy those who listened to the performance.
[0009]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sound producing device capable of producing a sound with a stable volume without being affected by a temperature change and having a rich expressive power. .
[0010]
[Means for solving problems]
In order to achieve the above object, the present invention Of the mechanical clock The sound generation device includes at least one sounding body that generates a predetermined timbre, a hammer head that is provided corresponding to the sounding body and generates a unique timbre of the sounding body by colliding with the sounding body, A rotary solenoid for driving the hammer head; temperature detecting means for detecting an ambient temperature of the rotary solenoid; and volume adjusting means for adjusting the volume of the sounding body, wherein the volume adjusting means After checking the scale, Volume Based on the detection result of the temperature detection means at each step of strength Selected from duty table A clock signal corresponding to each duty data is generated, and is higher than the rated voltage of the rotary solenoid based on the clock signal. Fixed The effective voltage of the rotary solenoid is controlled by applying a rectangular wave maximum voltage and changing the ratio of the application time and non-application time of the rectangular wave maximum voltage.
[0012]
According to the sound producing device of the present invention, the ambient temperature of the rotary solenoid is detected by the temperature detecting means. Based on the detection result of the temperature detection means, for example, a voltage that maintains a constant current flowing through the internal resistance of the rotary solenoid is applied to the rotary solenoid. Based on this applied voltage, the rotation speed of the rotary solenoid is changed by the volume adjusting means. Thereby, the collision speed between the hammer head and the sounding body is kept constant regardless of the state of the ambient temperature. As a result, a constant sound is generated regardless of the ambient temperature.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of a sound producing device of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a configuration of an embodiment of a sound producing device of the present invention, and FIGS. 2A and 2B are waveform diagrams showing examples of voltages applied to a rotary solenoid, respectively. 3 is a block diagram for explaining the configuration of the control circuit of the volume adjustment system using CD-MIDI. FIG. 4 shows the configuration of the control circuit of the volume adjustment system using a floppy disk containing MIDI data. It is a block diagram for demonstrating.
[0014]
As shown in FIG. 1, the sounding device of the present invention is provided with a plurality of sounding bodies 1 having a substantially cylindrical shape and different lengths, and each sounding body 1, and a specific tone color of each sounding body 1 is predetermined. A hammer mechanism 2 is provided as a volume control means for generating the sound at the volume.
[0015]
The hammer mechanism 2 has a rotary solenoid 3 fixed to the frame 50 so that the rotating shaft 4 is substantially horizontal, and is fixed to the rotating shaft 4 so as to be substantially orthogonal to the rotating shaft 4, and has a predetermined elasticity. The arm 5 is maintained as a balance weight with the hammer head 6 and the hammer head 6 is fixed to one end of the arm 5.
[0016]
The rotary solenoid 3 is stopped in a state where the longitudinal direction of the arm 5 is substantially vertical. When a predetermined voltage is applied, the rotary solenoid 3 rotates the arm 5 in the direction of the sounding body 1, and the hammer head 6 is moved to the sounding body. 1 is made to collide.
The rotary solenoid 3 is configured such that its rotational speed changes according to the value of the voltage applied to the rotary solenoid 3.
[0017]
The arm 5 is positioned by the hammer mechanism 2 so as to rotate in an in-plane direction passing through the central axis of the sounding body 1, and an elastic first arm 5a having a hammer head 6 disposed in the vicinity of a free end on one side. And a second arm 5b as a balance weight that is connected to the first arm 5a and optimally maintains the balance with the hammer head 6.
[0018]
The first arm 5a is a leaf spring-like elastic body, and is configured to absorb the complicated movement of the hammer head 6 when the hammer head 6 collides with the sounding body 1 with a predetermined elasticity.
The second arm 5 b is pivotally supported on the rotary shaft 4 of the rotary solenoid 3 so that the connecting portion with the first arm 5 a is located in a direction different from the mounting position of the hammer head 6. According to the rotation, both the first arm 5a and the second arm 5b are rotatable with respect to the rotation shaft 4.
[0019]
The second arm 5b is provided as a balance weight so that the operation of the rotary solenoid 3 can always maintain a stable rotational state.
Note that if the second arm 5b is provided with a lingering stop (not shown) made of an elastic body, a more favorable rotation operation of the rotary solenoid 3 can be realized.
[0020]
The hammer head 6 is fixed to one end of the first arm 5 a of the arm 5, and collides with the side surface of the sounding body 1 by the rotation of the rotary solenoid 3.
Note that the volume of the sounding body 1 is changed according to the collision speed or collision energy value of the hammer head 6 when it collides with the sounding body 1.
[0021]
The doll body 60 is configured such that the arm portion can be rotated in the vertical direction in accordance with the rotation of the rotary solenoid 3. The doll body 60 is made to appear as if it is performing a pseudo-belling operation by the rotation of the arm.
A thermistor 16 for detecting the temperature around the rotary solenoid 3 described later is embedded behind the head of the doll body 60.
[0022]
Next, a control device including a sound volume adjustment system of the sound producing device according to the present embodiment will be described with reference to FIGS.
In the sound producing device of the present embodiment, MIDI data of MIDI (Music Instrument Digital Interface) standard is used as a control signal.
[0023]
The MIDI data includes scale data and volume data. As for the scale data, data relating to which sound generator 1 is used to generate a sound from one piece of music is described. Data relating to how loud the body 1 is to be sounded is described.
In the sound generation device, volume data is particularly used for the control.
[0024]
As shown in FIGS. 3 and 4, the control device includes a microprocessor 11, a CD player 12 that reproduces a CD-MIDI, a D / A converter 13, an amplifier 14, a speaker 15, and temperature detection means that detects an external ambient temperature. Thermistor 16, the amplifier 17, the transistor 18 for amplifying the supply voltage, the MIDI sequencer 22 for reading MIDI data from the floppy disk, and the MIDI sound source 23.
[0025]
The CD player 12 is configured to reproduce the MIDI data stored in the CD-MIDI and generate a MIDI signal having data from 1 channel to 16 channels.
The MIDI sequencer 22 is configured to read the MIDI data stored on the floppy disk and generate a MIDI signal having data from 1 channel to 16 channels, like the CD player 12.
[0026]
The CD player 12 or the MIDI sequencer 22 outputs the data of 1 to 15 channels to the D / A converter 13 or the MIDI sound source 23, and the channel data (or “channel number”) and the scale data (or the sound generator 1). 16-channel data having “node number”) and timing / sound length data (or “velocity”) is input to the microprocessor 11.
[0027]
The D / A converter 13 or the MIDI sound source 23 converts 1 channel to 15 channel data into a music analog signal as background music, and the music analog signal is amplified by the amplifier 14 and generated from the speaker 15. Is done.
[0028]
The thermistor 16 is configured such that the resistance value decreases when the ambient temperature increases, and conversely, the resistance value increases when the ambient temperature decreases.
The thermistor 16 is embedded in the doll body 60 so that the temperature around the rotary solenoid 3 can be detected.
[0029]
The amplifier 17 amplifies a voltage value based on the resistance value detected by the thermistor 16 and outputs the amplified voltage value to the microprocessor 11.
The transistor 18 amplifies the voltage applied from the microprocessor 11 based on the detected temperature detected by the thermistor 16. The rotary solenoid 3 rotates at a predetermined speed in response to the amplified applied voltage.
[0030]
In the sound producing device of the present invention, the collision speed of the hammer head 6 with respect to the sound producing body 1 is changed, and the volume is changed according to the collision energy. The rotation speed of the solenoid 3 is changed.
[0031]
The relationship between the initial applied voltage of the rotary solenoid 3 and the rotational speed of the rotary solenoid or the impact speed of the hammer head 6 can be obtained by experiments. Also, the rotational speed of the rotary solenoid 3 or the impact speed of the hammer head 6 and The relationship with the sound volume of the sounding body 1 can also be obtained by experiments. Therefore, the relationship between the volume data included in the MIDI data and the initial applied voltage to the rotary solenoid 3 depends on the type of the rotary solenoid 3 to be used, the shape, size, thickness or material of the sounding body 1 in advance. Can be determined.
[0032]
However, when a voltage equal to or lower than the rated voltage is applied to the rotary solenoid 3, the torque of the rotary solenoid 3 varies greatly, and stable rotation operation cannot be expected. Therefore, even if the hammer head 6 collides with the sounding body 1 at a low speed, it is necessary that the collision speed does not vary.
[0033]
Therefore, in the sound producing device of this embodiment, in order to stabilize the collision speed when the hammer head 6 collides with the sound producing body 1 at a low speed, for example, a rectangular wave voltage as shown in FIG. Apply. The effective voltage V of such a 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 during which the maximum voltage in one pulse of the rectangular wave is applied.
[0034]
[Expression 1]
V _E = E (t / T)
[0035]
For example, as shown in FIG. 2 (a), when the rated voltage of the rotary solenoid 3 is 12V, the maximum voltage E of the rectangular wave E = 20V, the time T of one rectangular wave T = 0.5 mS, and one pulse of the rectangular wave Since the time t = 0.25 mS during which the maximum voltage is applied, V _E = 10 (V). That is, a voltage equal to or lower than the rated voltage can be applied. At this time, the ratio of the time t during which the maximum voltage is applied during the time T of one rectangular wave pulse, that is, the duty ratio is 0.25 / 0.5 = 50%.
[0036]
On the other hand, when the hammer head 6 is caused to collide with the sounding body 1 at a high speed, a rectangular wave voltage is similarly applied. In this case, the effective voltage is changed by changing the duty ratio without changing the maximum voltage of the rectangular wave.
For example, as shown in FIG. 2B, assuming that the rated voltage of the rotary solenoid 3 is 12V, the maximum voltage E of the rectangular wave E = 20V, the time T of one rectangular wave T = 0.5 mS, the maximum of one pulse of the rectangular wave Since the time when the voltage is applied is t = 0.4 mS, V _E = 16 (V). The duty ratio at this time is 0.4 / 0.5 = 80%.
[0037]
FIG. 5 shows experimental results when the duty ratio of the applied voltage is not changed using four samples (FIG. 5A) and when the effective voltage duty ratio is changed (FIG. 5B). FIG.
In FIG. 5A, the horizontal axis represents the applied voltage, and the vertical axis represents the volume.
In FIG. 5B, the horizontal axis represents the duty of the applied voltage (voltage duty), and the vertical axis represents the volume.
[0038]
As can be seen from FIG. 5, when the duty ratio of the applied voltage is not changed, the variation in volume is large below the rating with respect to the rated voltage of 12 V, and the operation is weak and unstable. In addition, there is a large voltage range even if it exceeds the rating, but there is a voltage region (stable voltage 17V) where the operation is stable.
It can be seen that when the effective voltage is controlled by a rectangular pulse of voltage, the variation in volume is reduced as shown in FIG.
[0039]
As described above, regardless of whether the voltage applied to the rotary solenoid 3 is equal to or higher than the rated voltage, by applying a rectangular wave voltage to the rotary solenoid 3, the impact speed of the hammer head 6 at low speed can be reduced. It can be stabilized.
[0040]
However, even though the collision speed of the hammer head 6 at low speed can be stabilized by applying a rectangular wave voltage to the rotary solenoid 3, the internal resistance of the rotary solenoid 3 is affected by the ambient temperature of the rotary solenoid 3. Since it fluctuates, the impact speed of the hammerhead 6 is still not stable.
For example, when the same voltage is applied to the rotary solenoid 3 and compared, normally, in the rotary solenoid 3 having a resistance of 33Ω at 20 ° C., the internal resistance is about 29Ω to a temperature change of −10 ° C. to 50 ° C. It varies up to about 37Ω.
[0041]
Therefore, in the sound producing device of the present embodiment, the value of the internal resistance of the rotary solenoid 3 is estimated based on the ambient temperature of the rotary solenoid 3, and further, the current flowing through the internal resistance of the rotary solenoid 3 is calculated based on the estimated value. Duty control is always made constant.
As described above, the ambient temperature of the rotary solenoid 3 is determined by the microprocessor 11 based on the change in the resistance value of the thermistor 16 embedded behind the head of the doll body 60.
[0042]
FIG. 6 is a diagram showing experimental results on the relationship between the change in ambient temperature and the impact value of the hammer head when the duty ratio based on the detected temperature of the rotary solenoid is controlled and when the duty ratio is fixed.
In FIG. 6, the horizontal axis indicates the ambient temperature, and the vertical axis indicates the impact value of the hammer head 6 on the sounding body 1. If the impact value of the hammer head 6 increases, the sound generated at the time of collision increases accordingly, so the vertical axis can be considered as the volume of the sounding device. The voltage applied to the rotary solenoid 3 was unified to 24V.
[0043]
As can be seen from FIG. 6, when the ambient temperature of the rotary solenoid 3 is increased in a state where the sound level is low, medium, or strong, the duty is fixed and the duty control based on the temperature change is not performed. Since the internal resistance of the rotary solenoid 3 increases as the ambient temperature increases, the rotational speed of the rotary solenoid 3 gradually decreases, as shown in (A1), (A2), (A3) of FIG. The impact value of the hammer head 6 on the sounding body 1 is also lowered.
[0044]
On the other hand, in the case of performing the duty control based on the change in the ambient temperature of the rotary solenoid 3 with respect to each of the sound levels of the weak sound, medium sound and strong sound, it is shown in (B1), (B2) and (B3) of FIG. Thus, the impact value of the hammer head 6 on the sounding body 1 is always in a stable state.
Therefore, regardless of the position of the volume, if duty control based on the change in the ambient temperature of the rotary solenoid 3 is performed, a stable and constant sound can be obtained regardless of the change in the ambient temperature.
[0045]
The operation of the embodiment of the sounding device of the present invention configured as described above will be described with reference to FIGS. 3, 4, 7 and 8. FIG.
FIG. 7 is a flowchart showing an operation of duty control based on a change in temperature of the sounding device shown in FIG. 1, and FIG. 8 is a duty data table for performing duty control of the sounding device.
[0046]
For example, at a predetermined time, the MIDI signal reception mode is set in the microprocessor 11, and the CD player 12 or the MIDI sequencer 22 is activated in response thereto.
The activated CD player 12 or MIDI sequencer 22 reads MIDI data from CD-MIDI or MIDI data FD (floppy disk), and outputs MIDI signals ranging from 1 channel to 16 channels.
[0047]
Of the MIDI signals output from the CD player 12 or the MIDI sequencer 22, data of 1 to 15 channels is input to the D / A converter 13 or the MIDI sound source 13 and converted into a music analog signal for background music.
The music analog signal converted by the D / A converter 13 or the MIDI sound source 13 is amplified by the amplifier 13 and input to the speaker 14, whereby the background music is output from the speaker 14.
[0048]
The 16-channel data output from the CD player 12 or the MIDI sequencer 22 is input to the microprocessor 11, and the sounding body 1 having a scale to be generated by the 16-channel MIDI data is selected.
At this time, the ambient temperature of the rotary solenoid 3 is measured by the microprocessor 11 based on the change in the resistance value of the thermistor 16 embedded behind the head of the doll body 60 (S1).
[0049]
After measuring the ambient temperature, the microprocessor 11 determines whether or not to start playing (S2). When the performance is not started ("NO" is selected in S2), the control circuit 10 enters an infinite loop state in which the ambient temperature is always measured until the performance start is OK. If the performance is OK ("YES" is selected in S2), the scale of the sound generator 1 selected by the microprocessor 11 is confirmed by the 16-channel MIDI data (S3).
[0050]
After confirming the scale of the sounding body 1, the microprocessor 11 determines whether or not the sound to be sounded by the sounding body 1 is a strong sound based on the volume data of the MIDI data (S4). If it is determined that the sound is a strong sound ("YES" is selected in S4), data suitable for the ambient temperature is extracted from the duty data for strong sound shown in FIG. 8 (S6). At this time, for example, if the ambient temperature is 10 ° C., the data S is extracted.
[0051]
When it is determined that the sound to be generated by the sound generator 1 is not a strong sound ("NO" is selected in S4), the microprocessor 11 determines whether it is a medium sound (S5). If it is determined that the sound is medium (“YES” is selected in S5), data suitable for the ambient temperature is extracted from the medium sound duty data shown in FIG. 8 (S7). At this time, for example, if the ambient temperature is 10 ° C., the data L is extracted.
[0052]
If it is determined that the sound produced by the sound generator 1 is not a medium sound ("NO" is selected in S5), the sound volume is inevitably weak because the sound volume is switched in three steps. As a result, data suitable for the ambient temperature is extracted from the low-frequency duty data shown in FIG. 8 (S8). At this time, for example, if the ambient temperature is 10 ° C., the data E is extracted.
[0053]
In accordance with the duty data extracted based on the above-described flow, the microprocessor 11 generates a clock signal for turning on / off a driving circuit (not shown) at a predetermined timing based on the volume data. Upon receiving this clock signal, a drive circuit (not shown) outputs a rectangular wave voltage having a predetermined duty ratio based on the clock signal, and the rectangular wave voltage is amplified by the transistor 18 and output to the rotary solenoid 3. Is done.
[0054]
The rotary solenoid 3 is driven at a speed corresponding to the effective voltage of the applied rectangular wave voltage (S9), and the hammer head 6 collides with the sounding body 1 at a speed corresponding to the rotational speed of the rotary solenoid 3. As a result, the sound generator 1 generates the tone of the scale according to the scale data at the volume according to the volume data corresponding to the collision speed or collision energy with the hammer head 6.
[0055]
Note that the time until the hammer head 6 collides with the sounding body 1 after the rotary solenoid 3 is activated can be known in advance by experiments or the like. For this reason, the application time of the rectangular wave voltage to the rotary solenoid 3 is also set in advance.
The energization of the rotary solenoid 3 is interrupted when the set time elapses after activation. Further, 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 retract the hammer head 6 at a high speed, the voltage applied to the rotary solenoid 3 does not need to be a rectangular wave voltage, and the voltage value may be constant.
[0056]
After the rotary solenoid 3 is moved away, it is determined by the microprocessor 1 whether or not the performance is finished (S10). If it is determined that the performance has ended ("YES" is selected in S10), the measurement of the ambient temperature is continued until the performance is started (S1). If the performance is not finished ("NO" is selected in S10), the scale of the sounding body 1 selected by the microprocessor 11 is confirmed by the 16-channel MIDI data (S3), the volume is judged and the performance is performed. To continue.
By repeating the above-described flow, it is possible to perform according to the MIDI data.
[0057]
In the present embodiment, the duty control based on the ambient temperature is performed in three stages of strong sound, medium sound, and weak sound, but the volume level is not limited to this. In other words, if the timbre has various changes, it is desirable to further set the volume.
[0058]
In the present 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. However, the duty ratio is fixed, Even if the maximum voltage value of the applied rectangular wave voltage is changed, the effective voltage of the rotary solenoid 3 can be changed similarly. Moreover, you may comprise so that both the highest voltage value and duty ratio of the square wave voltage to apply may be changed.
[0059]
In the present embodiment, a substantially cylindrical member is used as the sounding body 1. However, the present invention is not limited to this, and the same effect can be obtained even with a plate-like body, a rod-like body, or the like. The material of the sound generator 1 may be any material that can be used as a material for musical instruments such as metal and wood.
[0060]
According to the sound producing device of the present embodiment, the thermistor 16 is provided as temperature detecting means for detecting the ambient temperature of the rotary solenoid 3. Since it is configured to be rotationally driven by the controlled applied voltage, a stable sound can be generated in the sound generator 1 even if the ambient temperature fluctuates. As a result, for example, it is possible to realize a sounding device that can be used even in an environment with a large temperature difference such as outdoors.
[0061]
Further, according to the sounding device of the present embodiment, the maximum voltage value of the rectangular wave applied to the rotary solenoid 3 is made higher than the rated voltage of the rotary solenoid 3, and the effective voltage below the rated voltage is changed by changing the duty ratio. Can be obtained. Thereby, the collision speed between the hammer head 6 and the sounding body 1 in the low speed state can be always stabilized. As a result, it is possible to generate a desired stable sound even when the volume of the sounding body 1 is low.
[0062]
【The invention's effect】
As described above, according to the present invention, the set sound volume can always be kept constant even if the ambient temperature of the sounding device fluctuates. Thereby, a desired sound volume can be obtained without being influenced by the ambient temperature. Therefore, it is possible to realize a sounding device that can be used even in an environment where the temperature difference is severe.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of an embodiment of a sound producing device of the present invention.
2A is a diagram showing a rectangular wave voltage for obtaining an effective voltage equal to or lower than the rated voltage of the rotary solenoid; FIG. 2B is a rectangular wave voltage for obtaining an effective voltage equal to or higher than the rated voltage of the rotary solenoid; FIG.
FIG. 3 is a block diagram for explaining the configuration of a volume adjustment control device using CD-MIDI.
FIG. 4 is a block diagram for explaining the configuration of a volume control system control device using a floppy disk containing MIDI data;
FIGS. 5A and 5B are diagrams showing experimental results when four samples are used, where FIG. 5A shows a case where the duty ratio of the applied voltage is not changed, and FIG. 5B shows a case where the duty ratio of the effective voltage is changed (experiment). It is a figure which shows a result.
FIG. 6 is a diagram showing experimental results on the relationship between the change in ambient temperature and the impact value of the hammerhead when the duty ratio based on the detected temperature of the rotary solenoid is controlled and when the duty ratio is fixed.
7 is a flowchart showing an operation of duty control based on a change in temperature of the sounding device shown in FIG. 1;
FIG. 8 is a duty data table for performing duty control of the sound generation device.
FIG. 9 is a perspective view showing a configuration of a conventional sounding device.
[Explanation of symbols]
1,101 ... Sound generator
2,102 ... Hammer mechanism
3 ... Rotary solenoid
4 ... Rotating shaft
5 ... Arm
5a ... 1st arm
5b ... second arm
6,104 ... Hammerhead
11 ... Microprocessor
12 ... CD player
13 ... D / A converter
14, 17 ... Amplifier
15 ... Speaker
16 ... Thermistor
18 ... transistor
22 ... MIDI sequencer
23 ... MIDI sound source
50 ... Frame
60 ... doll body
103 ... leaf spring
106 ... plunger
107 ... Solenoid
108: Coil spring

Claims (1)

At least one sounding body that generates a predetermined tone;
A hammer head that is provided corresponding to the sounding body and generates a unique tone of the sounding body by colliding with the sounding body;
A rotary solenoid that drives the hammerhead;
Temperature detecting means for detecting the ambient temperature of the rotary solenoid; and volume control means for adjusting the volume of the sounding body,
The volume control means, after confirming the scale of the sounding body, outputs a clock signal corresponding to each duty data selected from the duty table based on the detection result of the temperature detection means at each stage of the volume intensity of the scale. By generating a fixed rectangular wave maximum voltage higher than the rated voltage of the rotary solenoid on the basis of the clock signal and changing the ratio between the application time and the non-application time of the rectangular wave maximum voltage. Control the effective voltage of the solenoid
Karakuri clock sound generator.

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