JP2015064586A - Music box device and music box system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a music box device capable of performing any musical composition even when a rotary member such as a cylinder or disc is not replaced.SOLUTION: The music box device includes: a diaphragm including a plurality of vibration valves 56; a pawl mechanism 52 for flipping a vibration valve 56; receiving means for receiving performance information; controlling means for performing control so as to convert the performance information into a driving signal; and a drive unit 50 for driving the pawl mechanism 52 on the basis of the converted driving signal. The receiving means and controlling means are achieved by a control program operating on the music box device.

Description

  The present invention relates to a music box device.

  In general, a music box device emits a sound corresponding to a vibration valve by flipping the vibration valve with a protrusion provided on a rotated cylinder, for example. This type of music box device is provided with a plurality of vibration valves. Therefore, a melody is produced by sequentially playing these vibration valves at a predetermined timing. Further, in a music box device, it is well known that a vibration valve is repelled at a predetermined timing by driving a disk (also referred to as a claw wheel) provided with a nail for repelling the vibration valve with a drive device such as a solenoid. .

In Patent Document 1, there is little mechanical noise, no abnormal contact between rotating bodies, no mechanical interference, no abnormal stop, and electronic control with a short delay time from signal input for sound generation until the vibration valve emits sound A method music box is disclosed.
Patent Document 2 discloses a music box that can play a music piece at an appropriate timing by reducing unnecessary friction in a mechanism for flipping a vibration valve.
Patent Document 3 discloses a music box control device that can reduce mechanical operation sound.

JP 2003-241746 A JP 2005-250198 A JP 2007-65279 A

  However, the music box devices disclosed in Patent Documents 1 to 3 can only play a predetermined song.

  An object of the present invention is to provide a music box device capable of playing an arbitrary piece of music even when a rotating member such as a cylinder or a disk is not replaced.

  The present invention according to claim 1 includes a music box unit that performs by playing a vibration valve with a claw mechanism, a control unit that controls the music box unit, and a receiving unit that receives an output signal from an external sensor. The control means is a music box device that controls the music box unit to start playing and stop playing based on an output signal from the external sensor.

In the present invention according to claim 2, the accepting means accepts an output signal from a human sensor,
The control means causes the music box unit to perform when the accepting means accepts an output signal indicating that a human is present from the human sensor, and the accepting means has no human being from the human sensor. The music box device according to claim 1, wherein when the output signal is received, the music box unit stops playing.

  The present invention according to claim 3 includes a music box unit that performs by playing a vibration valve with a claw mechanism, a control unit that controls the music box unit, and an external sensor, and the control means includes the external unit. The music box system controls the music box unit to start and stop the performance based on the output signal from the sensor.

  According to a fourth aspect of the present invention, the external sensor is a human sensor, and the control means causes the music box unit to perform when the human sensor detects that a human is present, and the human sensor. 4. The music box system according to claim 3, wherein when the sensor detects that no human is present, the music box unit stops playing.

  According to the music box apparatus according to the present invention, it is possible to play an arbitrary piece of music even when a rotating member such as a cylinder or a disk is not replaced.

1 is a diagram showing a music box system 1 including a music box device 10 according to an embodiment of the present invention. It is a figure which shows the structure of the music box apparatus 10 which concerns on embodiment of this invention. It is a side view which shows the structure of a drive part and a nail | claw mechanism. It is the schematic which shows the edge part of a sunwheel axis | shaft, and its surrounding structure. It is a perspective view which shows a star wheel and its periphery structure. It is explanatory drawing explaining operation | movement of a drive part and a nail | claw mechanism. It is the control program 100 which implement | achieves the control method of the music box apparatus 10 which concerns on embodiment of this invention. The flowchart of the control process (S10) in the case of converting the drive signal by the control program 100 into ON is shown. The flowchart of the control process (S20) in the case of converting the drive signal by the control program 100 into OFF is shown. The flowchart of the whole operation | movement (S30) of the music box apparatus 10 which concerns on embodiment of this invention is shown. It is a side view which shows the structure of the drive part and claw mechanism which concern on 2nd Embodiment. It is a top view which shows the structure of the drive part and claw mechanism which concern on 2nd Embodiment.

[First Embodiment]
FIG. 1 is a diagram showing a music box system 1 including a music box device 10 according to an embodiment of the present invention.
As shown in FIG. 1, the music box system 1 is connected to the music box device 10 through a music box device 10, a keyboard 12 and a terminal device 14 connected to the music box device 10, an external recording device 16, and a network 20. And a server device 18.

  The music box device 10 performs by receiving performance information from the keyboard 12 or the terminal device 14 and converting the performance information into a drive signal. Further, the music box device 10 reads performance information from the external recording device 16 or acquires performance information from the server device 18. The music box device 10 will be described in detail later.

  The keyboard 12 outputs performance information to the music box device 10. The keyboard 12 has a plurality of white keys and black keys. When a white key or a black key is pressed, the keyboard 12 outputs performance information including information related to the scale corresponding to the pressed white key or black key to the music box device 10. The keyboard 12 is also called a keyboard.

  The terminal device 14 is a general-purpose personal computer, for example, and includes a CPU, a memory, a communication device, a keyboard, a mouse, and the like (not shown). The terminal device 14 stores performance information. The terminal device 14 outputs the stored performance information to the music box device 10. Further, the terminal device 14 may output performance information including information related to the scale designated by the keyboard or the mouse to the music box device 10.

  The external recording device 16 is, for example, a CD, a DVD, a card type recording device, or the like. Performance information is recorded in the external recording device 16. When the external recording device 16 is attached to the music box device 10, the stored performance information can be read from the music box device 10.

  The network 20 is a network configured by, for example, a LAN, a WAN, or the like. The network 20 may be a wired network or a wireless network.

  The server device 18 is a web server, for example, and has a configuration equivalent to that of the terminal device 14. The server device 18 stores performance information. Upon receiving a download request from the music box device 10, the server device 18 transmits the stored performance information to the music box device 10.

  The performance information is, for example, MIDI (Musical Instruments Digital Interface) data. The performance information includes the scale corresponding to the pressed key, the strength at which the key is pressed, the timing at which the key was pressed, and the like.

FIG. 2 is a diagram showing a configuration of the music box device 10 according to the embodiment of the present invention.
As shown in FIG. 2, the music box device 10 includes a control unit 22, a music box unit 24, an AC adapter 26, and a display device 28. The control unit 22 includes a CPU 30, a memory 32, a clock device 34, a FET (Field Effect Transistor) switch 36, a power switch 38, an amplifier device 40, a MIDI-interface (IF) 42, an external recording device IF 44, a communication IF 45, and an external sensor. IF 46 is included. The music box unit 24 includes a motor 48, a drive unit 50, a claw mechanism 52, a diaphragm 54 and a pickup 58.

  In the control unit 22, the CPU 30 executes a later-described control program 100 stored in the memory 32. Further, the CPU 30 inputs and outputs signals to and from other components included in the control unit 22.

  The display device 28 is, for example, a liquid crystal display or LED (Light Emitting Diode), and displays a musical score corresponding to performance information, a performance status, and the like.

  Based on the time set by the operator, the clock device 34 outputs a signal to the CPU 30 at the set time and controls the CPU 30 to operate at a desired time.

  The FET switch 36 controls a current flowing in the drive unit 50 described later based on a drive signal output from the CPU 30. More specifically, when the FET switch 36 receives an on signal (also referred to as a high signal) from the CPU 30, the FET switch 36 controls the current to flow through the driving unit 50 and receives an off signal (also referred to as a low signal) from the CPU 30. In such a case, control is performed so that no current flows through the drive unit 50.

  The FET switch 36 includes n FET switching circuits (not shown). Here, n is the number of vibration valves 56 described later, for example, n = 33. Therefore, the FET switch 36 controls the current flowing through the drive unit 50 so that the vibration valve 56 corresponding to the FET switching circuit is repelled based on the drive signal for each FET switching circuit.

When the power switch 38 is in the ON state, the power switch 38 supplies a predetermined voltage supplied from the AC adapter 26 to other components included in the control unit 22 and components included in the music box unit 24 described later.
Instead of the AC adapter 26, a predetermined voltage may be supplied from the battery 27 to the power switch 38.

  The amplifier device 40 receives an output signal from a pickup 58 that is disposed below the diaphragm 54 and converts resonance sound into an electrical signal, and amplifies this signal. The amplifier device 40 is connected to a line-out terminal 60 for taking out a signal.

  The MIDI-IF 42 receives performance information output from the keyboard 12 or the terminal device 14 and outputs it to the CPU 30. The external recording device IF 44 outputs the performance information read from the external recording device 16 to the CPU 30. The communication IF 45 receives performance information transmitted from the server device 18 via the network 20 and outputs the performance information to the CPU 30.

The external sensor IF 46 receives an output signal from an external sensor 47 provided outside the music box device 10, outputs this output signal to the CPU 30, and controls the operation of the CPU 30. As the external sensor 47, for example, a microphone, a human sensor, a temperature sensor, a humidity sensor, an illuminance sensor, an atmospheric pressure sensor, an acceleration sensor, a gyro sensor, or the like can be used.
Therefore, the start and stop of the performance can be controlled based on the output signal of the external sensor 47.

  When the performance is set to be controlled based on the external sensor 47, for example, when a human sensor is used as the external sensor 47, the music box device 10 performs a predetermined operation while the external sensor 47 determines that a human is present. While the song is played and it is determined that there is no human being, control such as stopping the performance is possible.

  In the music box unit 24, the motor 48 drives the claw mechanism 52 described later to rotate. The vibration plate 54 includes a plurality of vibration valves 56-1 to 56-n formed in a comb shape. The lengths of the vibration valves 56-1 to 56-n are different from each other, and when the vibration valves 56-1 to 56-n are played, the sound of the corresponding scale is emitted.

  The drive unit 50 controls a claw mechanism 52 described later based on a drive signal output from the CPU 30 via the FET switch 36. Specifically, the drive unit 50 controls the claw mechanism 52 to flip the vibration valve 56 when a current is passed through the FET switch 36, and the claw mechanism 52 vibrates when the current is interrupted by the FET switch 36. Control is performed so as not to play the valve 52.

Next, the drive unit 50 and the claw mechanism 52 will be described in detail.
3 to 6 show detailed configurations of the driving unit 50 and the claw mechanism 52. FIG.
As shown in FIG. 3, the drive unit 50 includes a solenoid 62. The solenoid 62 moves in the longitudinal direction a stop member 64 that penetrates the stop member receiver 66 and is disposed so as to be capable of moving forward and backward. The stop member 64 is biased to the side opposite to the solenoid 62 (right side in FIG. 3) by the elastic member 63 of the solenoid 62.
By using a conical spring as the elastic member 63, the space can be used effectively (compacted).
In addition, noise absorbing members 68 and 69 are provided before and after the stop member in the forward and backward movement direction, respectively. The noise absorbing members 68 and 69 absorb the noise generated with the movement of the stop member 64.

  Such a combination of the solenoid 62 and the stop member 64 is provided so as to correspond to the vibration valve 56 and a star wheel 92 described later. This combination corresponds to each FET switching circuit included in the FET switch 36. When a current flows from the FET switching circuit, the solenoid 62 moves the stop member 64 to the solenoid 62 side (left side in FIG. 3) against the urging force of the elastic member 63. In this way, the stop member 64 of the drive unit 50 moves forward and backward. As a result, the stop of the rotation of the star wheel 92 is released as will be described later, and the star wheel 92 rotates (counterclockwise in FIG. 3).

  The rotating unit 70 includes a sun wheel 72 and a sun wheel shaft 74. The sun wheel 72 is installed so as to rotate integrally with the sun wheel shaft 74 (clockwise in FIG. 3) around the sun wheel shaft 74 driven by the motor 48. A plurality of (for example, nine) engaging teeth 76 are provided on the outer periphery of the sun wheel 72 at equal intervals. The sun wheel 72 is configured to engage the engaging tooth 76 with a claw 96 of the star wheel 92 described later and rotate the star wheel 92.

The sun wheel 72 is made of, for example, an elastomer. By providing the sun wheel 72 with a predetermined flexibility, the locking teeth 76 of the sun wheel 72 and the claw 96 of the star wheel 92 collide with each other without engaging (meshing), and the sun wheel 72 and the star wheel 92 It is possible to prevent the rotation from being stopped.
When the elastomer constituting the sun wheel 72 has a hardness of 60 to 90 (A60 / S to A90 / S), the sun wheel 72 and the star wheel 92 are effectively compared with the case where the hardness is outside the range of the hardness 60 to 90. Can be prevented from stopping. The hardness of the elastomer represents a numerical value measured by JIS K6253, durometer, type A, spring type.
Moreover, when the elastomer which comprises the sunwheel 72 is hardness 70-80 (A70 / S-A80 / S), compared with the case where it is out of the range of hardness 70-80, the sunwheel 72 and more effectively It is possible to prevent the rotation of the star wheel 92 from being stopped.

  As shown in FIG. 4, the sun wheel shaft 74 is provided with a detection unit 77 for detecting the rotational position of the sun wheel 72. FIG. 4A shows a side view of the end of the sun wheel shaft 74, and FIG. 4B shows a schematic view of the rotating disk 80 included in the detection unit 77. The detection unit 77 includes a photo sensor 78 and a rotating disk 80 that rotates according to the rotation of the sun wheel shaft 74.

  The photo sensor 78 is a transmissive sensor, and has a structure that faces the light detection element 78b so that the detection light 82 emitted from the light emitting element 78a is received by the light receiving element 78b. When the detection light 82 from the light emitting element 78a of the photosensor 78 is blocked, the output of the light receiving element 78b changes. The photosensor 78 is disposed at a position where the detection light 82 is blocked by the rotating disk 80, that is, sandwiching the rotating disk 80. The photosensor 78 is detected in a plurality of (for example, nine) holes 84 provided in the rotating disk 80. 82 is transmitted, and the detection light 82 enters the light receiving element 78b.

  The hole 84 is provided at a predetermined position in the circumferential direction of the turntable 80. For this reason, the output of the light receiving element 78b changes as the detection light 82 is blocked and transmitted in synchronization with the rotation of the turntable 80. By this change in output, the rotation of the rotating disk 80, that is, the position of the sun wheel 72 and the rotation position (the position of the engaging tooth 76) can be detected. The hole 84 may be a slit.

  As shown in FIG. 5, the claw mechanism 52 includes n star wheels 92 and a star wheel shaft 94. The star wheel 92 is installed so as to rotate about the star wheel shaft 94 driven by the motor 48 (counterclockwise in FIG. 3). On the outer periphery of the star wheel 92, a plurality of (for example, four) claws 96 (96a to 96d) are provided at equal intervals. A sound is generated when the claw 96 plays the vibration valve 56.

  Each star wheel 92 is provided so as to rotate according to the rotation of the star wheel shaft 94, but when the stop member 64 moves to the star wheel 92 side and comes into contact with the claw 96, the star wheel shaft 94 rotates. In this state, the rotation of the star wheel 92 is stopped (idling).

  The star wheel 92 is configured not to contact the sun wheel 72 when the star wheel 92 is in a position where the rotation of the star wheel 92 is stopped. That is, when the rotation of the star wheel 92 is stopped by the stop member 64, the claw 96 of the star wheel 92 is at a position away from the rotation track of the engagement tooth 76 of the sun wheel 72 (see FIG. 3). . Thus, the star wheel 92 whose rotation is stopped by the stop member 64 is configured to maintain the rotation stopped state without following the rotation of the sun wheel 72.

Next, operations of the drive unit 50 and the claw mechanism 52 will be described.
As shown in FIG. 6, when the stop member 64 moves to the solenoid 62 side, the stop member 64 and the claw 96a do not contact each other. For this reason, the stop of the rotation of the star wheel 92 is released, and the star wheel 92 rotates. When the star wheel 92 rotates, the claw 96c facing the claw 96a that has been in contact with the stop member 64 moves to a position where it engages with the engagement teeth 76 of the sun wheel 72. The claw 96 c engages with the engagement teeth 76, and the star wheel 92 rotates according to the rotation of the sun wheel 72, so that the claw 96 b repels the vibration valve 56. On the other hand, the rotation of the star wheel 92 is stopped when the stop member 64 moves toward the star wheel 92 and comes into contact with the claw 96d.

  In the present embodiment, for example, the sun wheel shaft 74 is controlled to rotate faster than the star wheel shaft 94. By doing so, the claw 96c is engaged with the engaging teeth 76 before the claw 96b contacts the vibration valve 56, and a sound is generated in synchronization with the rotation of the sun wheel 72 via the star wheel 92. It has a configuration that can emit.

  The number of engaging teeth 76 of the sun wheel 72, the number of claws 96 of the star wheel 92, the rotational speeds and the installation positions of the sun wheel shaft 74 and the star wheel shaft 94 are not limited to the above embodiment. It can be changed as appropriate according to the situation.

FIG. 7 is a control program 100 that realizes a control method of the music box apparatus 10 according to the embodiment of the present invention.
As shown in FIG. 7, the control program 100 includes a drive signal control unit 102, a data reception unit 104, a data storage unit 106, a drive signal output unit 108, a timer 110, and a duration determination unit 112.

  In the control program 100, the data reception unit 104 receives performance information input to the CPU 30 and stores it in the data storage unit 106. For example, when performance information is input via the MIDI-IF 38, the data reception unit 104 stores the performance information in the data storage unit 106 by interrupt processing.

  The data storage unit 106 stores performance information received by the data receiving unit 104. The data storage unit 106 is realized by a storage area taken in the memory 32. The data storage unit 106 is, for example, a ring buffer.

  The drive signal control unit 102 reads performance information stored in the data storage unit 106 and converts this performance information into a drive signal. Specifically, the drive signal control unit 102 performs control so that the drive signal corresponding to the scale becomes an ON signal based on the information regarding the scale included in the performance information. In this way, the drive signal control unit 102 performs control so that the performance information received by the data receiving unit 104 is converted into a drive signal. Further, the drive signal control unit 102 starts timing of a timer 110 described later at a timing when the drive signal is turned on.

The drive signal output unit 108 outputs a drive signal converted from performance information to the FET switch 36 under the control of the drive signal control unit 102. For example, the drive signal output unit 108 outputs an ON signal to the FET switching circuit corresponding to the scale included in the FET switch 36.
The timer 110 starts measuring time at a timing controlled by the drive signal control unit 102.

  The duration determination unit 112 determines whether or not the value measured by the timer 110 exceeds a predetermined threshold value T1, and if the measured value exceeds the threshold value T1, the drive signal control unit 102 for output. The threshold value T1 is a value at which the state where the drive signal is an ON signal can be continued. For example, the threshold value T1 is determined by the nail 96 (same nail 96a) adjacent to the nail 96 (same nail 96b) after the nail 96 (nail 96b in FIG. 3) of the star wheel 92 repels the vibration valve 56. It is a value smaller than the time until 56 is played.

Next, control processing by the control program 100 will be described in more detail.
FIG. 8 shows a flowchart of the control process (S10) when the drive signal by the control program 100 is turned on.
As shown in FIG. 8, in step 100 (S100), the drive signal control unit 102 determines whether or not the performance information is to be played in the music box device 10. For example, the drive signal control unit 102 determines whether or not a MIDI data reception channel matches a preset reception channel of the music box device 10. The drive signal control unit 102 proceeds to the process of S102 if the performance information is to be played on the music box device 10, and ends the control process otherwise.

  In step 102 (S102), the drive signal control unit 102 determines whether or not the performance information is information for making a sound. For example, the drive signal control unit 102 determines whether or not the MIDI data event is “note on”. The drive signal control unit 102 proceeds to the process of S104 when the performance information is information for sounding, and ends the control process otherwise.

  In step 104 (S104), the drive signal control unit 102 determines whether or not the sound to be played can be generated by the music box device 10. For example, the drive signal control unit 102 determines whether or not the scale data is included in a range that can be generated by the music box device 10. The drive signal control unit 102 proceeds to the process of S106 when the sound to be played can be generated by the music box apparatus 10, and ends the control process otherwise.

  In step 106 (S106), the drive signal control unit 102 determines whether or not the drive signal corresponding to the scale is already an ON signal. The drive signal control unit 102 proceeds to the process of S108 when the drive signal corresponding to the scale is already on, and proceeds to the process of S110 when the drive signal corresponding to the scale is off.

  In step 108 (S108), the drive signal control unit 102 increases the threshold value T1. That is, the drive signal control unit 102 performs control so that the state in which the drive signal is an on signal continues for a longer time. For example, the drive signal control unit 102 adds a sufficient time for the claw 96 of the star wheel 92 to flip the vibration valve 56 once to the threshold value T1. For this reason, the time for which the star wheel 92 rotates is extended, and the claw 96 of the star wheel 92 repels the vibration valve 56.

  In step 110 (S110), the drive signal control unit 102 controls the drive signal output unit 108 so that the drive signal corresponding to the scale becomes an ON signal. The drive signal output unit 108 converts the drive signal corresponding to the scale output to the FET switch 36 into an ON signal.

  When the drive signal is converted to ON, a current flows through the solenoid 62 of the drive unit 50, and the star wheel 92 is controlled to rotate. When the star wheel 92 rotates, the claws 96 of the star wheel 92 play the vibration valve 56 of the scale corresponding to the drive signal converted to ON.

  In step 112 (S112), the drive signal control unit 102 controls the timer 110 to start timing. The timer 110 starts measuring the time that has elapsed since the drive signal corresponding to this scale was turned on.

FIG. 9 shows a flowchart of the control process (S20) when the drive signal by the control program 100 is converted to OFF.
As shown in FIG. 9, in step 200 (S200), the drive signal control unit 102 determines whether or not the state in which the drive signal is an on signal continues for a time T1. More specifically, the drive signal control unit 102 determines whether or not a signal indicating that the state in which the drive signal is an ON signal has exceeded the T1 time has been received from the duration determination unit 112. The drive signal control unit 102 proceeds to the process of S202 when the state in which the drive signal is the on signal continues for the time T1, and ends the control process otherwise. The drive signal control unit 102 performs this determination process on the drive signals corresponding to all the scales.

  In step 202 (S202), the drive signal control unit 102 controls the drive signal output unit 108 so that the drive signal corresponding to the scale becomes an off signal. The drive signal output unit 108 converts the drive signal corresponding to the scale output to the FET switch 36 into an off signal. Thereby, the rotation of the star wheel 92 corresponding to this musical scale is stopped.

FIG. 10 shows a flowchart of the overall operation (S30) of the music box apparatus 10 according to the embodiment of the present invention.
When the user presses the white key or black key on the keyboard 12, performance information is output from the keyboard 12 to the music box device 10. When the performance information is input to the music box device 10 and received by the data receiving unit 104 of the control program 100, the performance information is stored in the data storage unit 106 by, for example, interrupt processing. The performance information may be transmitted from the terminal device 14 or acquired from the external recording device 16 or the server device 18.

  As shown in FIG. 10, in step 300 (S300), the drive signal control unit 102 of the control program 100 determines whether or not the received performance information is stored in the data storage unit 106. When the performance information is stored in the data storage unit 106, the drive signal control unit 102 proceeds to the process of S302. On the other hand, when the performance information is not stored in the data storage unit 106, the control program 100 proceeds to a control process (S20) for converting the drive signal to OFF.

  In step 302 (S302), the drive signal control unit 102 reads performance information stored in the data storage unit 106. Thereafter, the control program 100 executes a control process (S10) for converting the drive signal to ON.

  In addition, the control program 100 executes a control process (S20) when the drive signal is converted to OFF. In this way, the music box device 10 receives performance information and emits a sound based on the performance information.

[Second Embodiment]
11 and 12 show the driving unit 50 and the claw mechanism 52 used in the second embodiment. FIG. 11 shows a schematic view of the drive unit 50 and the claw mechanism 52 from the side surface direction, and FIG. 12 shows a schematic view of the drive unit 50 and the claw mechanism 52 from the top surface direction.
In the present embodiment, the solenoid 62 is provided forward and backward with respect to the vertical direction and the moving direction of the stop member 64. In addition, although each solenoid 62 is the same structure, each is set as solenoid 62a-62d for description.

  Specifically, the solenoid 62b is disposed above the solenoid 62a at a position shifted in the width direction (arrangement direction of the vibration valves 56). A solenoid 62c is disposed behind the solenoid 62a at a position shifted in the width direction from the solenoid 62b. Further, a solenoid 62d is disposed at a position shifted in the width direction above the solenoid 62c.

  As described above, the solenoids 62 are not arranged at the adjacent positions corresponding to the vibration valve 56, and thus are less susceptible to the influence of the size of the solenoid 62 in the width direction. For this reason, each solenoid 62 can be arranged corresponding to the pitch of the vibration valves 56.

1 Music Box System 10 Music Box Device 12 Keyboard 14 Terminal Device 16 External Recording Device 18 Server Device 20 Network 22 Control Unit 24 Music Box Unit 26 Adapter 28 Display Device 32 Memory 34 Clock Device 36 FET Switch 38 Power Switch 40 Amplifier Device 42 MIDI-IF
44 External recording device IF
45 Communication IF
46 External sensor IF
47 External sensor 48 Motor 50 Drive unit 52 Claw mechanism 70 Rotation unit 76 Detection unit 100 Control program 102 Drive signal control unit 104 Data reception unit 106 Data storage unit 106 Data storage unit 108 Drive signal output unit 110 Timer 112 Duration determination unit

Claims (4)

A music box unit that plays by playing a vibration valve with a claw mechanism;
A control unit for controlling the music box unit;
Receiving means for receiving an output signal from an external sensor;
Have
The music control device controls the music box unit so as to start performance and stop performance based on an output signal from the external sensor. The accepting means accepts an output signal from a human sensor,
The control means causes the music box unit to perform when the accepting means accepts an output signal indicating that a human is present from the human sensor, and the accepting means has no human being from the human sensor. The music box device according to claim 1, wherein the music box unit stops playing when an output signal is received. A music box unit that plays by playing a vibration valve with a claw mechanism;
A control unit for controlling the music box unit;
An external sensor,
Have
The music control system controls the music box unit so that the control means starts and stops the performance based on an output signal from the external sensor. The external sensor is a human sensor,
The control means causes the music box unit to perform when the human sensor detects that a human is present, and causes the music box unit to stop playing when the human sensor detects that a human is not present. 3. Music box system according to 3.

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