WO2021100448A1 - 検出システム、演奏操作装置および鍵盤楽器 - Google Patents

検出システム、演奏操作装置および鍵盤楽器 Download PDF

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Publication number
WO2021100448A1
WO2021100448A1 PCT/JP2020/041035 JP2020041035W WO2021100448A1 WO 2021100448 A1 WO2021100448 A1 WO 2021100448A1 JP 2020041035 W JP2020041035 W JP 2020041035W WO 2021100448 A1 WO2021100448 A1 WO 2021100448A1
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WO
WIPO (PCT)
Prior art keywords
coil
detection system
detected
wiring board
magnetic material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/041035
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English (en)
French (fr)
Japanese (ja)
Inventor
俊允 三吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Corp
Original Assignee
Yamaha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Corp filed Critical Yamaha Corp
Priority to JP2021558263A priority Critical patent/JP7392736B2/ja
Priority to EP20890153.8A priority patent/EP4064272B1/en
Priority to CN202080078686.XA priority patent/CN114730555A/zh
Publication of WO2021100448A1 publication Critical patent/WO2021100448A1/ja
Priority to US17/746,207 priority patent/US20220277717A1/en
Anticipated expiration legal-status Critical
Priority to JP2023117415A priority patent/JP7544206B2/ja
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/32—Constructional details
    • G10H1/34—Switch arrangements, e.g. keyboards or mechanical switches specially adapted for electrophonic musical instruments
    • G10H1/344—Structural association with individual keys
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element
    • G01D5/2026—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element constituting a short-circuiting element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/0008—Associated control or indicating means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/053—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
    • G10H1/055—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements
    • G10H1/0555—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements using magnetic or electromagnetic means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/32—Constructional details
    • G10H1/34—Switch arrangements, e.g. keyboards or mechanical switches specially adapted for electrophonic musical instruments
    • G10H1/344—Structural association with individual keys
    • G10H1/346—Keys with an arrangement for simulating the feeling of a piano key, e.g. using counterweights, springs, cams
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H03K17/972—Switches controlled by moving an element forming part of the switch using a magnetic movable element having a plurality of control members, e.g. keyboard
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2220/00—Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155—User input interfaces for electrophonic musical instruments
    • G10H2220/221—Keyboards, i.e. configuration of several keys or key-like input devices relative to one another
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2220/00—Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155—User input interfaces for electrophonic musical instruments
    • G10H2220/265—Key design details; Special characteristics of individual keys of a keyboard; Key-like musical input devices, e.g. finger sensors, pedals, potentiometers, selectors
    • G10H2220/275—Switching mechanism or sensor details of individual keys, e.g. details of key contacts, hall effect or piezoelectric sensors used for key position or movement sensing purposes; Mounting thereof
    • G10H2220/281—Switching mechanism or sensor details of individual keys, e.g. details of key contacts, hall effect or piezoelectric sensors used for key position or movement sensing purposes; Mounting thereof with two contacts, switches or sensor triggering levels along the key kinematic path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H03K2017/9713—Multiposition, e.g. involving comparison with different thresholds

Definitions

  • the present disclosure relates to a technique for detecting the movement of a movable member.
  • Patent Document 1 has a configuration in which a displacement of a movable member is detected by using an exciting coil and a position detection coil installed on the fixed member and an excited coil installed on the movable member that moves with respect to the fixed member.
  • Each of the exciting coil, the position detection coil, and the magnetized coil is formed in an annular shape parallel to the direction in which the movable member moves.
  • one aspect of the present disclosure is to easily secure the range of displacement of the movable member capable of effectively changing the level of the detection signal.
  • the detection system is a detection system that detects the displacement of the movable member according to the playing motion, and is installed on the movable member to provide a first coil.
  • a signal generation unit including a detected unit including a second coil that generates a magnetic field by supplying an electric current and generating a detection signal at a level corresponding to the distance between the detected unit and the second coil, and the movable member.
  • a magnetic material installed in at least one of the signal generation units.
  • the performance operation device is a movable member that is displaced according to a performance operation, a detected portion that is installed on the movable member and includes a first coil, and a first that generates a magnetic field by supplying an electric current.
  • a signal generation unit that includes two coils and generates a detection signal at a level corresponding to the distance between the detected unit and the second coil, and a magnetic material installed on at least one of the movable member and the signal generation unit. Equipped with.
  • the keyboard instrument includes a key that is displaced according to a playing operation, a detected portion that is installed on the key and includes a first coil, and a second coil that generates a magnetic field by supplying an electric current.
  • a signal generation unit that includes and generates a detection signal at a level corresponding to the distance between the detection unit and the second coil, a magnetic material installed in at least one of the key and the signal generation unit, and the detection signal. It is provided with a sound generation unit that generates a sound according to the above.
  • FIG. 6 is a cross-sectional view taken along the line aa in FIG. It is explanatory drawing of the magnetic field generated in the 1st coil of the detected part. It is a top view which illustrates the specific structure of the signal generation part.
  • 9 is a cross-sectional view taken along the line bb in FIG.
  • FIG. 14 is a cross-sectional view taken along the line cc in FIG. It is a top view of the detected part in 3rd Embodiment. It is a top view of the detected part in 3rd Embodiment. It is a top view of the detected part in 4th Embodiment. It is a top view of the detected part in 5th Embodiment.
  • FIG. 14 is a cross-sectional view taken along the line cc in FIG. It is a top view of the detected part in 3rd Embodiment. It is a top view of the detected part in 3rd Embodiment. It is a top view of the detected part in 4th Embodiment. It is a top view of the detected part in 5th Embodiment.
  • FIG. 19 is a cross-sectional view taken along the line dd in FIG. It is a block diagram of the detection system in the modification. It is a block diagram of the detection system in the modification. It is a perspective view which illustrates the structure of the support and the fixing member in the modification. It is a top view of the detected part in the modification. It is a top view of the detected part in the modification. It is a top view of the detected part in the modification. It is a top view of the detected part in the modification. It is a top view of the detected part in the modification.
  • FIG. 1 is a block diagram illustrating the configuration of the keyboard instrument 100 according to the first embodiment of the present disclosure.
  • the keyboard instrument 100 is an electronic musical instrument including a keyboard 10, a detection system 20, an information processing device 30, and a sound emitting device 40.
  • the keyboard 10 is composed of a plurality of keys 12 including a plurality of white keys and a plurality of black keys.
  • Each of the plurality of keys 12 is a movable member that is displaced according to the performance operation by the user.
  • the detection system 20 detects the position of each key 12.
  • the information processing device 30 generates an acoustic signal V according to the result of detection by the detection system 20.
  • the acoustic signal V is a signal representing a musical tone having a pitch corresponding to the key 12 operated by the user.
  • the sound emitting device 40 emits the sound represented by the acoustic signal V.
  • a speaker or headphones are used as the sound emitting device 40.
  • FIG. 2 is a block diagram illustrating a specific configuration of the keyboard instrument 100 by focusing on one key 12 of the keyboard 10.
  • Each key 12 of the keyboard 10 is supported by the support member 14 with the fulcrum portion (balance pin) 13 as the fulcrum.
  • the support member 14 is a structure (frame) that supports each element of the keyboard instrument 100.
  • the end 121 of each key 12 is displaced in the vertical direction by the user pressing and releasing the key.
  • the detection system 20 generates a detection signal D at a level corresponding to the position Z of the end portion 121 in the vertical direction for each of the plurality of keys 12.
  • the position Z is represented by the amount of displacement of the end portion 121 with reference to the position of the end portion 121 in the released state in which no load acts on the key 12.
  • the detection system 20 includes a detected unit 50, a signal generation unit 60, and a signal processing circuit 21.
  • the detected unit 50 and the signal generation unit 60 are installed for each key 12.
  • the signal generation unit 60 is installed on the support member 14.
  • the detected unit 50 is installed on the key 12.
  • the detected unit 50 is installed on the bottom surface (hereinafter referred to as “installation surface”) 122 of the key 12.
  • the detected unit 50 includes the first coil 51.
  • the signal generation unit 60 includes a second coil 61.
  • the first coil 51 and the second coil 61 face each other in the vertical direction with a distance from each other.
  • the distance between the signal generation unit 60 and the detected unit 50 changes according to the position Z of the end portion 121 on the key 12.
  • FIG. 3 is a circuit diagram illustrating the electrical configuration of the signal generation unit 60.
  • the signal generation unit 60 includes a resonance circuit including an input terminal T1, an output terminal T2, a second coil 61, a capacitance element 62, and a capacitance element 63.
  • the second coil 61 is connected between the input terminal T1 and the output terminal T2.
  • the capacitance element 62 is connected between the input terminal T1 and the ground wire, and the capacitance element 63 is connected between the output terminal T2 and the ground wire.
  • the signal generation unit 60 functions as a low-frequency elimination filter that suppresses low-frequency components in the signal supplied to the input terminal T1.
  • FIG. 4 is a circuit diagram illustrating the electrical configuration of the detected unit 50.
  • the detected unit 50 includes a resonance circuit including a first coil 51 and a capacitive element 52. Both ends of the first coil 51 and both ends of the capacitance element 52 are connected to each other.
  • the resonance frequency of the detected unit 50 and the resonance frequency of the signal generation unit 60 are common. However, the resonance frequency of the detected unit 50 and the resonance frequency of the signal generation unit 60 may be different.
  • the signal processing circuit 21 of FIG. 2 generates a detection signal D at a level corresponding to the distance between the first coil 51 and the second coil 61.
  • FIG. 5 is a block diagram illustrating a specific configuration of the signal processing circuit 21.
  • the signal processing circuit 21 includes a supply circuit 22 and an output circuit 23.
  • the supply circuit 22 supplies the reference signal R to each of the plurality of signal generation units 60.
  • the reference signal R is a current signal or a voltage signal whose level fluctuates periodically. For example, a periodic signal having an arbitrary waveform such as a sine wave is used as the reference signal R.
  • the supply circuit 22 supplies the reference signal R to each signal generation unit 60 in a time-division manner.
  • the supply circuit 22 is a demultiplexer that sequentially selects each of the plurality of signal generation units 60 and supplies the reference signal R to the selected signal generation unit 60. That is, the reference signal R is supplied to each of the plurality of signal generation units 60 in a time-division manner.
  • the period of the reference signal R is sufficiently shorter than the time length of the period during which the supply circuit 22 selects one signal generation unit 60.
  • the frequency of the reference signal R is substantially the same as the resonance frequency of the signal generation unit 60 and the detected unit 50. However, the frequency of the reference signal R and the resonance frequencies of the signal generation unit 60 and the detected unit 50 may be different.
  • the reference signal R is supplied to the input terminal T1 of the signal generation unit 60.
  • a magnetic field is generated in the second coil 61 by supplying a current corresponding to the reference signal R to the second coil 61.
  • An induced current is generated in the first coil 51 by electromagnetic induction due to the magnetic field generated in the second coil 61. Therefore, a magnetic field in a direction that cancels the change in the magnetic field of the second coil 61 is generated in the first coil 51.
  • the magnetic field generated in the first coil 51 changes according to the distance between the first coil 51 and the second coil 61. Therefore, the detection signal d having an amplitude level ⁇ corresponding to the distance between the first coil 51 and the second coil 61 is output from the output terminal T2 of the signal generation unit 60.
  • the detection signal d is a periodic signal whose level fluctuates in the same period as the reference signal R.
  • the output circuit 23 of FIG. 5 generates a detection signal D by arranging the detection signals d sequentially output from each of the plurality of signal generation units 60 on the time axis. That is, the detection signal D is a voltage signal having an amplitude level ⁇ according to the distance between the first coil 51 and the second coil 61 in each key 12. As described above, since the distance between the first coil 51 and the second coil 61 is linked to the position Z of each key 12, the detection signal D is expressed as a signal corresponding to each position Z of the plurality of keys 12. The detection signal D generated by the output circuit 23 is supplied to the information processing device 30.
  • the information processing device 30 of FIG. 2 analyzes the position Z of each key 12 by analyzing the detection signal D supplied from the signal processing circuit 21.
  • the information processing device 30 is realized by a computer system including a control device 31, a storage device 32, an A / D converter 33, and a sound source circuit 34.
  • the A / D converter 33 converts the detection signal D supplied from the signal processing circuit 21 from analog to digital.
  • the control device 31 is composed of a single or a plurality of processors that control each element of the keyboard instrument 100.
  • the control device 31 is one or more types such as a CPU (Central Processing Unit), an SPU (Sound Processing Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or an ASIC (Application Specific Integrated Circuit). It consists of a processor.
  • the storage device 32 is a single or a plurality of memories for storing a program executed by the control device 31 and data used by the control device 31.
  • the storage device 32 is composed of a known recording medium such as a magnetic recording medium or a semiconductor recording medium.
  • the storage device 32 may be configured by combining a plurality of types of recording media.
  • a portable recording medium that can be attached to and detached from the keyboard instrument 100, or an external recording medium (for example, online storage) that the keyboard instrument 100 can communicate with may be used as the storage device 32.
  • the control device 31 analyzes the position Z of each key 12 by analyzing the detection signal D after conversion by the A / D converter 33. Further, the control device 31 instructs the sound source circuit 34 to pronounce a musical tone according to the position Z of each key 12.
  • the sound source circuit 34 generates an acoustic signal V representing a musical tone instructed by the control device 31. That is, the sound source circuit 34 generates the acoustic signal V corresponding to the amplitude level ⁇ of the detection signal D. For example, the volume of the acoustic signal V is controlled according to the amplitude level ⁇ .
  • the control device 31 may realize the function of the sound source circuit 34 by executing the program stored in the storage device 32.
  • FIG. 6 is a plan view illustrating a specific configuration of the detected unit 50.
  • FIG. 6 shows a plan view of the detected unit 50 as viewed from the signal generation unit 60 side.
  • FIG. 7 is a cross-sectional view taken along the line aa in FIG.
  • the detected portion 50 of the first embodiment is composed of a wiring board 54 including a base material 55 and a wiring pattern 56.
  • the base material 55 is a rectangular plate-shaped member including the surface F1 and the surface F2.
  • the surface F2 is a surface facing the installation surface 122 of the key 12.
  • the surface F1 is a surface opposite to the surface F2. Therefore, the surface F1 faces the signal generation unit 60.
  • the width of the base material 55 is less than the width of one key 12.
  • a plurality of through holes 57 are formed in the base material 55.
  • Each through hole 57 is a circular opening that penetrates the base material 55.
  • the wiring board 54 is fixed to the installation surface 122 of the key 12 by fixing members 71 (71a, 71b) penetrating each through hole 57.
  • Each fixing member 71 is a screw inserted into the installation surface 122. Specifically, the fixing member 71a is inserted into the through hole 57a, and the fixing member 71b is inserted into the through hole 57b.
  • Each fixing member 71 is a magnetic material formed of a magnetic material such as iron or ferrite.
  • the wiring pattern 56 is a conductive film formed on the surface (surface F1 and surface F2) of the base material 55. Specifically, the wiring pattern 56 is formed by patterning that selectively removes the conductive film that covers the entire surface of the base material 55.
  • the first coil 51 of the detected portion 50 is composed of a wiring pattern 56. Therefore, for example, as compared with a configuration in which the first coil 51 is formed by winding a conductive wire, there is an advantage that the first coil 51 can be easily manufactured and handled.
  • the first coil 51 includes a first portion 511 and a second portion 512.
  • the first portion 511 and the second portion 512 are formed on the surface F1.
  • the first portion 511 and the second portion 512 are formed in different regions in a plan view from a direction perpendicular to the surface F1. Specifically, the first portion 511 and the second portion 512 are adjacent to each other along the longitudinal direction of the key 12.
  • the first portion 511 is formed in a shape surrounding the through hole 57a. Specifically, the first portion 511 is a spiral portion that rotates clockwise from the inner peripheral side end portion Ea1 located around the through hole 57a to the outer peripheral side end portion Ea2.
  • the fixing member 71a overlaps the central axis of the first portion 511 in a plan view. That is, the first portion 511 surrounds the periphery of the fixing member 71a in a plan view. Therefore, the fixing member 71a functions as a core of the first portion 511.
  • the first portion 511 does not overlap the head of the fixing member 71a inserted into the through hole 57a in a plan view.
  • the second portion 512 is formed in a shape surrounding the through hole 57b. Specifically, the second portion 512 is a spiral portion that rotates clockwise from the inner peripheral side end portion Eb1 located around the through hole 57b to the outer peripheral side end portion Eb2.
  • the fixing member 71b overlaps the central axis of the second portion 512 in a plan view. That is, the second portion 512 surrounds the periphery of the fixing member 71b in a plan view. Therefore, the fixing member 71b functions as a core of the second portion 512.
  • the second portion 512 does not overlap the head of the fixing member 71b inserted into the through hole 57b in a plan view.
  • the wiring pattern 56 includes the connecting wiring 514 formed on the surface F2 of the base material 55.
  • the end portion Ea1 and the end portion Eb1 are connected to each other via the connecting wiring 514.
  • a capacitance element 52 mounted on the surface F1 is interposed between the end portion Ea2 and the end portion Eb2.
  • the direction of the current flowing through the first portion 511 and the direction of the current flowing through the second portion 512 are opposite. Specifically, in a state where the current in the direction Q1 flows in the first portion 511, the current in the direction Q2 opposite to the direction Q1 flows in the second portion 512. Therefore, as illustrated in FIG. 8, magnetic fields in opposite directions are generated in the first portion 511 and the second portion 512. That is, a magnetic field is formed from one of the first portion 511 and the second portion 512 toward the other. According to the above configuration, the diffusion of the magnetic field between the keys 12 adjacent to each other is reduced. Therefore, a detection signal D that accurately reflects each position Z of the plurality of keys 12 is generated.
  • the fixing member 71 formed of the magnetic material is installed in each key 12, the magnetic field generated in the first coil 51 is compared with the configuration in which the magnetic material is not installed. Is enhanced. That is, the range of displacement of the key 12 in which the magnetic field of the first coil 51 significantly affects the magnetic field of the second coil 61 is extended. Therefore, there is an advantage that it is easy to secure a displacement range (detection stroke) of the key 12 that can effectively change the amplitude level ⁇ of the detection signal D.
  • the fixing member 71 for fixing the wiring board 54 to the key 12 is formed of a magnetic material.
  • the configuration of the detection system 20 is simplified as compared with the configuration in which the wiring board 54 is fixed to the key 12 by a member separate from the magnetic material for enhancing the magnetic field of the first coil 51. .. Further, since the fixing member 71 is inserted into the through hole 57 of the wiring board 54, the wiring board 54 can be fixed to the key 12 with a simple configuration.
  • the fixing member 71 overlaps the central axis of the first coil 51. Specifically, the fixing member 71a overlaps the central axis of the first portion 511, and the fixing member 71b overlaps the central axis of the second portion 512. Therefore, the effect that the magnetic field generated in the first coil 51 is enhanced is remarkable as compared with the configuration in which the fixing member 71 is sufficiently separated from the first coil 51.
  • FIG. 9 is a plan view illustrating a specific configuration of the signal generation unit 60.
  • a plan view of the signal generation unit 60 as viewed from the detected unit 50 side is shown in FIG.
  • FIG. 10 is a cross-sectional view taken along the line bb in FIG.
  • the signal generation unit 60 is composed of a wiring board 64 including a base material 65 and a wiring pattern 66.
  • the base material 65 is a long plate-shaped member that is continuous over a plurality of keys 12.
  • the base material 65 is a plate-shaped member including the surface F3 and the surface F4.
  • the surface F4 faces the support member 14.
  • the surface F3 is a surface opposite to the surface F4. Therefore, the surface F3 faces the detected portion 50.
  • the wiring pattern 66 is a conductive film formed on the surface (surface F3 and surface F4) of the base material 65. Specifically, the wiring pattern 66 is formed by patterning that selectively removes the conductive film that covers the entire surface of the base material 65.
  • the second coil 61 of the signal generation unit 60 is configured by the wiring pattern 66. Therefore, for example, as compared with a configuration in which the second coil 61 is formed by winding a conductive wire, there is an advantage that the second coil 61 can be easily manufactured and handled.
  • the second coil 61 includes a third portion 611 and a fourth portion 612.
  • the third portion 611 and the fourth portion 612 are formed on the surface F3.
  • the third portion 611 and the fourth portion 612 are formed in different regions in a plan view from a direction perpendicular to the surface F3. Specifically, the third portion 611 and the fourth portion 612 are adjacent to each other along the longitudinal direction of the key 12.
  • the third portion 611 is a spiral portion that rotates counterclockwise from the end Ec1 on the inner peripheral side to the end Ec2 on the outer peripheral side.
  • the fourth portion 612 is a spiral portion that rotates counterclockwise from the end portion Ed1 on the inner peripheral side to the end portion Ed2 on the outer peripheral side.
  • the wiring pattern 66 includes the connecting wiring 614 formed on the surface F4 of the base material 65.
  • the end portion Ec1 and the end portion Ed1 are connected to each other via the connecting wiring 614.
  • an input terminal T1 and an output terminal T2 are formed on the surface F3.
  • a capacitive element 62 is connected between the input terminal T1 and the end Ec2 of the third portion 611.
  • a capacitive element 63 is connected between the output terminal T2 and the end Ed2 of the fourth portion 612.
  • the wiring that connects the capacitance element 62 and the capacitance element 63 to each other is connected to the ground point G set to the ground potential.
  • the direction of the current flowing through the third part 611 and the direction of the current flowing through the fourth part 612 are opposite. Specifically, in a state where the current in the direction Q3 flows in the third portion 611, the current in the direction Q4 opposite to the direction Q3 flows in the fourth portion 612. Therefore, as illustrated in FIG. 11, magnetic fields in opposite directions are generated in the third portion 611 and the fourth portion 612. That is, a magnetic field is formed from one of the third portion 611 and the fourth portion 612 toward the other. According to the above configuration, the diffusion of the magnetic field between the keys 12 adjacent to each other is reduced. Therefore, it is possible to generate a detection signal D that accurately reflects each position Z of the plurality of keys 12.
  • the distance between the first coil 51 and the second coil 61 in the direction of the central axis of the second coil 61 changes according to the displacement of the key 12. Therefore, for example, the level of the detection signal D with respect to the displacement of the key 12 is compared with the configuration in which the first coil 51 and the second coil 61 move relatively in a plane perpendicular to the central axis of the second coil 61. Can be changed significantly.
  • FIG. 12 is a perspective view illustrating the configuration of the detected portion 50 in the second embodiment.
  • the wiring board 54 constituting the detected portion 50 is directly fixed to the installation surface 122 by the fixing member 71.
  • the detected portion 50 of the second embodiment includes a wiring board 54 and a support 80.
  • the support 80 is fixed to the installation surface 122 of the key 12.
  • the wiring board 54 is supported by the support 80.
  • FIG. 13 is a plan view illustrating a state in which the wiring board 54 is removed from the support 80.
  • FIG. 14 is a plan view illustrating a state in which the wiring board 54 is supported by the support 80.
  • FIG. 15 is a cross-sectional view taken along the line cc in FIG.
  • the support 80 is a flat box-shaped structure that supports the wiring board 54.
  • the material and manufacturing method of the support 80 are arbitrary, but the support 80 is formed by, for example, injection molding of a resin material.
  • the support 80 includes a bottom surface portion 81, a side wall portion 82a, a side wall portion 82b, and a rear wall portion 83.
  • the bottom surface portion 81 is a flat plate-shaped portion including a holding surface Fa and a mounting surface Fb.
  • the bottom surface portion 81 is formed in a rectangular shape corresponding to the outer shape of the wiring board 54.
  • the mounting surface Fb is a surface facing the installation surface 122
  • the holding surface Fa is a surface opposite to the mounting surface Fb.
  • the side wall portion 82a, the side wall portion 82b, and the rear wall portion 83 are wall-shaped portions protruding from the holding surface Fa along the peripheral edge of the bottom surface portion 81.
  • the side wall portion 82a and the side wall portion 82b face each other, and the rear wall portion 83 extends over the side wall portion 82a and the side wall portion 82b.
  • the wiring board 54 is housed in a space surrounded on three sides by the side wall portion 82a, the side wall portion 82b, and the rear wall portion 83 with the holding surface Fa of the bottom surface portion 81 as the bottom surface. As illustrated in FIG. 15, when the wiring board 54 is housed in the support 80, the surface F2 faces the holding surface Fa.
  • a plurality of protrusions 84 are formed on each of the side wall portion 82a and the side wall portion 82b.
  • Each protrusion 84 is a portion that protrudes from the inner wall surface of the side wall portion 82a or the side wall portion 82b.
  • Each of the protrusions 84 faces the holding surface Fa of the bottom surface 81 at intervals slightly exceeding the thickness of the wiring board 54 (base material 55). As illustrated in FIG. 15, the wiring board 54 is held between each protrusion 84 and the holding surface Fa.
  • a holding protrusion 85 is formed on the peripheral edge of the bottom surface portion 81 opposite to the rear wall portion 83.
  • the holding protrusion 85 is a portion that protrudes from the holding surface Fa.
  • the wiring board 54 is inserted through the opening between the side wall portion 82a and the side wall portion 82b, and is moved until one end surface of the wiring board 54 reaches the inner wall surface of the rear wall portion 83.
  • the holding projection 85 faces the other end surface of the wiring board 54. That is, the wiring board 54 is held between the holding projection 85 and the rear wall portion 83.
  • the holding protrusion 85 is a claw-shaped portion that holds the wiring board 54 by being hooked on the end surface of the wiring board 54.
  • the wiring board 54 is removable from the support 80. Therefore, there is an advantage that the wiring board 54 can be easily replaced as compared with the configuration in which the wiring board 54 is directly fixed to the installation surface 122.
  • a plurality of through holes 87 are formed in the bottom surface portion 81 of the support 80.
  • Each through hole 87 is a circular opening that penetrates the bottom surface portion 81.
  • the support 80 is fixed to the installation surface 122 of the key 12 by the fixing members 71 (71a, 71b) penetrating each through hole 87.
  • Each fixing member 71 is a screw inserted into the installation surface 122.
  • the fixing member 71a is inserted into the through hole 87a
  • the fixing member 71b is inserted into the through hole 87b.
  • Each fixing member 71 is a magnetic material formed of a magnetic material such as iron or ferrite, as in the first embodiment.
  • the first coil 51 is formed on the wiring board 54 of the second embodiment.
  • the through hole 57 is not formed in the wiring board 54 of the second embodiment. Therefore, in the second embodiment, it is easier to secure the area of the region where the first coil 51 is formed as compared with the first embodiment in which the through hole 57 is formed in the wiring board 54. That is, the wiring width and the number of turns of the first coil 51 can be easily secured.
  • the first coil 51 includes a first portion 511 and a second portion 512, as in the first embodiment.
  • the fixing member 71a inserted into the through hole 87a overlaps the central axis of the first portion 511 of the first coil 51 in a plan view. Therefore, the fixing member 71a functions as a core of the first portion 511.
  • the fixing member 71b inserted into the through hole 87b overlaps the central axis of the second portion 512 in the first coil 51 in a plan view. Therefore, the fixing member 71b functions as a core of the second portion 512.
  • the fixing member 71 for fixing the support 80 that supports the wiring board 54 to the key 12 is formed of a magnetic material. Therefore, there is an advantage that the configuration of the detection system 20 is simplified as compared with the configuration in which the support 80 is fixed to the key 12 by a member separate from the magnetic material for enhancing the magnetic field of the first coil 51. .. Further, since the fixing member 71 is inserted into the through hole 87 of the support 80, the support 80 can be fixed to the key 12 by a simple configuration.
  • the configuration in which the first coil 51 is formed on the surface F1 of the base material 55 is exemplified.
  • the first coil 51 is composed of a stack of a plurality of wiring patterns 56.
  • FIG. 16 and 17 are plan views illustrating the configuration of the wiring board 54 in the third embodiment.
  • FIG. 16 shows the wiring formed on the surface F1
  • FIG. 17 shows the wiring formed on the surface F2.
  • the outer shape seen through from the surface F1 side is shown for convenience.
  • the first portion 511 of the first coil 51 is composed of a laminate of the first layer La1 and the second layer La2.
  • the first layer La1 is formed on the surface F1
  • the second layer La2 is formed on the surface F2.
  • the first layer La1 is a spiral portion that rotates from the end portion Ea1 on the inner peripheral side to the end portion Ea2 on the outer peripheral side.
  • the second layer La2 is a spiral portion that rotates from the end portion Ea3 on the inner peripheral side to the end portion Ea4 on the outer peripheral side.
  • the end portion Ea1 and the end portion Ea3 are connected to each other through a conduction hole formed in the base material 55.
  • the second portion 512 of the first coil 51 is composed of a laminate of the first layer Lb1 and the second layer Lb2.
  • the first layer Lb1 is formed on the surface F1, and the second layer Lb2 is formed on the surface F2.
  • the first layer Lb1 is a spiral portion that rotates from the end portion Eb1 on the inner peripheral side to the end portion Eb2 on the outer peripheral side.
  • the second layer Lb2 is a spiral portion that rotates from the end portion Eb3 on the inner peripheral side to the end portion Eb4 on the outer peripheral side.
  • the end portion Eb1 and the end portion Eb3 are connected to each other through a conduction hole formed in the base material 55.
  • the configuration in which the end portion Ea2 of the first layer La1 and the end portion Eb2 of the first layer Lb1 are connected to the capacitive element 52 is the same as that of the first embodiment.
  • a relay wiring 516 is formed on the surface F1.
  • the relay wiring 516 is a linear wiring extending from the end portion e1 to the end portion e2.
  • the end Ea4 of the second layer La2 in the first portion 511 is connected to the end e1 of the relay wiring 516, and the end Eb4 of the second layer Lb2 in the second portion 512 is connected to the end e2 of the relay wiring 516. ..
  • a current flows in the same direction in the first layer La1 and the second layer La2 of the first portion 511, and the same direction flows in the first layer Lb1 and the second layer Lb2 of the second portion 512.
  • Current flows.
  • the direction of the current flowing through the first portion 511 and the direction of the current flowing through the second portion 512 are opposite to each other.
  • FIGS. 16 and 17 exemplify a form based on the wiring board 54 of the first embodiment in which the through hole 57 is formed, the wiring board 54 of the second embodiment in which the through hole 57 is not formed is illustrated.
  • the same configuration applies to.
  • the first coil 51 is composed of two layers, but the number of layers of the first coil 51 may be three or more.
  • FIG. 18 is a plan view illustrating the configuration of the detected portion 50 in the fourth embodiment.
  • the detected unit 50 of the fourth embodiment is composed of the wiring board 54 as in the first embodiment.
  • the configuration in which the fixing member 71 overlaps the central axis of the first coil 51 is illustrated.
  • the fixing members 71 (71a, 71b) do not overlap the central axis of the first coil 51.
  • the structure in which the fixing member 71 is made of a magnetic material is the same as that in the first embodiment.
  • the through hole 57a and the fixing member 71a are located on the opposite side of the first portion 511 from the second portion 512.
  • the through hole 57b and the fixing member 71b are located on the side opposite to the first portion 511 with the second portion 512 interposed therebetween. That is, the fixing member 71a and the fixing member 71b are installed at each position sandwiching the first coil 51.
  • the fixing member 71 formed of the magnetic material since the fixing member 71 formed of the magnetic material is installed on the key 12, it is generated in the first coil 51 as compared with the configuration in which the magnetic material is not installed, as in the first embodiment.
  • the magnetic field is strengthened. Therefore, there is an advantage that it is easy to secure a displacement range (detection stroke) of the key 12 that can effectively change the amplitude level ⁇ of the detection signal D.
  • FIG. 19 is a plan view illustrating the configuration of the detected portion 50 in the fifth embodiment.
  • FIG. 20 is a cross-sectional view taken along the line dd in FIG.
  • a plurality of fixing members 72 72a, 72b are used for fixing the wiring board 54 to the installation surface 122.
  • the fixing member 72 is a fastener (staple) having a shape in which a linear member is bent in the same direction at two places.
  • the fixing member 72 includes a first needle portion 721, a second needle portion 722, and a connecting portion 723.
  • the first needle portion 721 and the second needle portion 722 extend in parallel with a distance from each other.
  • the connecting portion 723 connects the end portion of the first needle portion 721 and the end portion of the second needle portion 722 to each other.
  • the fixing member 72 is a magnetic material formed of a magnetic material such as iron or ferrite.
  • a plurality of mounting holes 58 are formed in the base material 55.
  • Each mounting hole 58 is an opening that penetrates the base material 55.
  • the mounting holes 58a1 and the mounting holes 58b1 are formed in a circular shape in a plan view, and the mounting holes 58a2 and the mounting holes 58b2 are semicircular notches formed on the peripheral edge of the base material 55.
  • the mounting holes 58a1 and the mounting holes 58a2 are located on opposite sides of the first portion 511 from the second portion 512.
  • the mounting holes 58b1 and the mounting holes 58b2 are located on the opposite sides of the second portion 512 from the first portion 511.
  • the wiring board 54 is fixed to the installation surface 122 by driving the fixing member 72 into the installation surface 122 through the mounting hole 58. Specifically, the first needle portion 721 of the fixing member 72a is driven into the installation surface 122 through the mounting hole 58a1, and the second needle portion 722 of the fixing member 72a is driven into the installation surface 122 through the mounting hole 58a2. Is driven into. Further, the first needle portion 721 of the fixing member 72b is driven into the installation surface 122 through the mounting hole 58b1, and the second needle portion 722 of the fixing member 72b is driven into the installation surface 122 through the mounting hole 58b2. Is done.
  • the fixing member 72 formed of the magnetic material since the fixing member 72 formed of the magnetic material is installed on the key 12, it is generated in the first coil 51 as compared with the configuration in which the magnetic material is not installed, as in the first embodiment.
  • the magnetic field is strengthened. Therefore, there is an advantage that it is easy to secure a displacement range (detection stroke) of the key 12 that can effectively change the amplitude level ⁇ of the detection signal D.
  • the first embodiment (FIG. 6), the second embodiment (FIG. 14), and the third embodiment (FIG. 16) are expressed as a form in which the fixing member 71 is located inside the first coil 51 in a plan view.
  • the inside of the first coil 51 is the inside of a closed region surrounded by the outer circumference of the first coil 51.
  • the fourth embodiment (FIG. 18) and the fifth embodiment (FIG. 19) are expressed as a form in which the fixing members (71, 72) are located outside the first coil 51 in a plan view.
  • the outside of the first coil 51 is the outside of the closed region surrounded by the outer circumference of the first coil 51.
  • FIG. 21 is a schematic diagram of a configuration in which the detection system 20 is applied to the string striking mechanism 91 of the keyboard instrument 100. Similar to an acoustic piano, the string striking mechanism 91 is an action mechanism that strikes a string (not shown) in conjunction with the displacement of each key 12 of the keyboard 10. Specifically, the string striking mechanism 91 includes a hammer 911 capable of striking a string by rotation and a transmission mechanism 912 (for example, a wipen, a jack, a repetition lever, etc.) that rotates the hammer 911 in conjunction with the displacement of the key 12. Is provided for each key 12. In the above configuration, the detection system 20 detects the displacement of the hammer 911.
  • a transmission mechanism 912 for example, a wipen, a jack, a repetition lever, etc.
  • the detected portion 50 is installed in the hammer 911 (for example, a hammer shank).
  • the wiring board 54 constituting the detected portion 50 is fixed to the hammer 911 by the fixing member 71 which is a magnetic material.
  • the signal generation unit 60 is installed on the support member 913.
  • the support member 913 is a structure that supports, for example, the string striking mechanism 91.
  • the wiring board 54 may be installed on the hammer 911 via the support 80.
  • the detected portion 50 may be installed on a member other than the hammer 911 in the string striking mechanism 91.
  • FIG. 22 is a schematic diagram of a configuration in which the detection system 20 is applied to the pedal mechanism 92 of the keyboard instrument 100.
  • the pedal mechanism 92 includes a pedal 921 operated by the user with his / her foot, a support member 922 that supports the pedal 921, and an elastic body 923 that urges the pedal 921 upward in the vertical direction.
  • the detection system 20 detects the displacement of the pedal 921.
  • the detected portion 50 is installed on the bottom surface of the pedal 921. That is, the wiring board 54 constituting the detected portion 50 is fixed to the pedal 921 by the fixing member 71 which is a magnetic material.
  • the signal generation unit 60 is installed on the support member 922 so as to face the detected unit 50.
  • the wiring board 54 may be installed on the pedal 921 via the support 80.
  • the musical instrument in which the pedal mechanism 92 is used is not limited to the keyboard instrument 100.
  • a pedal mechanism 92 having the same configuration is used for any musical instrument such as a percussion instrument.
  • the object of detection by the detection system 20 is comprehensively expressed as a movable member that is displaced according to the playing motion.
  • the movable member includes a performance operator such as a key 12 or a pedal 921 directly operated by the user, and a structure such as a hammer 911 that is displaced in conjunction with an operation on the performance operator.
  • the movable member in the present disclosure is not limited to the member that is displaced according to the playing motion. That is, the movable member is comprehensively expressed as a displaceable member regardless of the trigger for causing the displacement.
  • the screw is exemplified as the fixing member 71, but the form of the fixing member 71 is not limited to the above examples.
  • a nail, a bolt, or the like may be used as the fixing member 71.
  • the fixing member 71 (that is, staple) illustrated in FIG. 23 may be used for fixing the support 80.
  • the fixing member 71 of FIG. 23 includes an insertion portion 711, an insertion portion 712, and a connecting portion 713.
  • the connecting portion 713 connects the insertion portion 711 and the inserting portion 712.
  • the insertion portion 711 is inserted into the installation surface 122 of the key 12 through the through hole 87a.
  • the insertion portion 712 is inserted into the installation surface 122 through the through hole 87b.
  • the wiring board 54 may be directly fixed to the installation surface 122 by using the fixing member 71 illustrated in FIG. 23.
  • the fixing member 71 for fixing the detected portion 50 is used as a magnetic material for enhancing the magnetic field of the first coil 51, but the magnetism is separate from the fixing member 71. You may set up your body. That is, the function of fixing the detected portion 50 is not essential for the magnetic material for enhancing the magnetic field of the first coil 51.
  • the configuration in which the keyboard instrument 100 includes the sound source circuit 34 is illustrated.
  • the sound source circuit 34 is used. It may be omitted.
  • the detection system 20 is used to record the performance content of the keyboard instrument 100.
  • the sound generation mechanism and the sound source circuit 34 are comprehensively expressed as a sound generation unit that generates sound according to the result of detection by the detection system 20.
  • the present disclosure is also specified as a device (performance operation device) that controls a musical sound by outputting an operation signal according to a performance operation to the sound source circuit 34 or a sounding mechanism.
  • the device not having the sound source circuit 34 or the sounding mechanism for example, the MIDI controller or the pedal mechanism 92 described above
  • the performance operation device in the present disclosure is comprehensively expressed as a device operated by a performer (operator) for performance.
  • the first coil 51 includes the first portion 511 and the second portion 512
  • the configuration in which the first coil 51 is formed by two coils is indispensable.
  • the first coil 51 may be formed of one coil (eg, only one of the first portion 511 and the second portion 512).
  • the first coil 51 is formed so as to surround the fixing member 71 inserted into the through hole 57 in a plan view.
  • one long first coil 51 is provided along the longitudinal direction of the key 12 so as to surround the plurality of fixing members 71 for fixing the wiring board 54 in a plan view. May be installed. Further, as illustrated in FIG.
  • the fixing member 72 of the fifth embodiment may be installed inside the first coil 51 in a plan view.
  • the configuration in which the first coil 51 is one coil is similarly applied to the second to fourth embodiments.
  • a configuration formed by two coils is not essential.
  • the configuration in which the distance between the first coil 51 and the second coil 61 changes according to the playing operation is illustrated, but instead of the above configuration, the first coil 51 and the second coil 51 and the second coil are second. It is also assumed that the area where the coils 61 face each other (hereinafter referred to as “opposing area”) changes according to the playing operation.
  • the amplitude level ⁇ of the detection signal d output from the signal generation unit 60 changes according to the facing area.
  • the distance or the facing area between the first coil 51 and the second coil 61 may change according to the playing operation.
  • the magnetic material (fixing member 71) is installed on the key 12, which is an example of the movable member, but the magnetic material may be installed on the signal generation unit 60.
  • a fixing member such as a screw for fixing the signal generation unit 60 (particularly the base material 65) to the support member 14 is used as the magnetic material.
  • the magnetic material is installed in the signal generation unit 60, the magnetic field generated in the second coil 61 is enhanced. Therefore, the same effect as in each of the above-described forms is realized, that is, it is easy to secure the displacement range (detection stroke) of the key 12 that can effectively change the level of the detection signal D.
  • the above-described configuration for the magnetic material installed on the key 12 is similarly applied to the magnetic material installed on the signal generation unit 60.
  • the magnetic material may be installed in the signal generation unit 60, or the magnetic material may be installed in the signal generation unit 60 instead of the magnetic material of the key 12. .. That is, a magnetic material such as a fixing member is installed on at least one of the key 12 (movable member) and the signal generation unit 60.
  • the detection system is a detection system that detects the displacement of the movable member according to the playing operation, and is installed on the movable member and includes a detected portion including the first coil.
  • a signal generation unit that includes a second coil that generates a magnetic field by supplying an electric current and generates a detection signal at a level corresponding to the distance between the detected unit and the second coil, the movable member, and the signal generation unit. It is provided with a magnetic material installed on at least one of the above. According to the above configuration, since a current is generated in the first coil by electromagnetic induction by the magnetic field of the second coil, a magnetic field in a direction canceling the magnetic field of the second coil is generated in the first coil.
  • the signal generation unit generates a detection signal at a level corresponding to the distance between the detected unit and the second coil. That is, a detection signal is generated according to the displacement of the movable member. Since the magnetic material is installed in at least one of the movable member and the signal generation unit, the magnetic field generated in the first coil or the second coil is enhanced as compared with the configuration in which the magnetic material is not installed. Therefore, there is an advantage that it is easy to secure a displacement range (detection stroke) of the movable member capable of effectively changing the level of the detection signal.
  • the distance between the detected portion and the second coil in the direction of the central axis of the second coil changes according to the displacement of the movable member.
  • the detected portion and the second coil relatively move in a plane perpendicular to the central axis of the second coil (that is, the detected portion in the direction of the central axis of the second coil).
  • the level of the detection signal can be significantly changed with respect to the displacement of the movable member.
  • the detected portion includes a wiring board on which the first coil is formed, and the magnetic material is for fixing the wiring board to the movable member.
  • the fixing member for fixing the wiring board to the movable member is used as the magnetic material, compared with the configuration in which the wiring board is fixed to the movable member by a member separate from the magnetic material, It has the advantage of simplifying the configuration of the detection system.
  • the fixing member is inserted into the through hole formed in the wiring board.
  • the fixing member since the fixing member is inserted into the through hole of the wiring board, the wiring board can be fixed to the movable member by a simple configuration.
  • the detected portion includes a wiring board on which the first coil is formed and a support supporting the wiring board, and the magnetic material is the magnetic material.
  • the magnetic material is the magnetic material.
  • a fixing member for fixing the support to the movable member since the fixing member for fixing the support supporting the wiring board to the movable member is used as the magnetic body, the support is fixed to the movable member by a member separate from the magnetic body. Compared with, there is an advantage that the configuration of the detection system is simplified.
  • the fixing member is inserted into the through hole formed in the support.
  • the support can be fixed to the movable member by a simple configuration.
  • the first coil is a wiring pattern formed on the surface of the wiring board.
  • the wiring pattern constituting the first coil is formed on the wiring board, there is an advantage that the first coil can be easily manufactured and handled.
  • the first coil includes a first portion and a second portion, and flows in the direction of the current flowing in the first portion and in the second portion.
  • the direction is opposite to the direction of the electric current.
  • the second coil includes a third portion and a fourth portion, and flows in the direction of the current flowing in the third portion and in the fourth portion.
  • the direction is opposite to the direction of the electric current.
  • the magnetic material overlaps the central axis of the first coil. According to the above aspect, since the magnetic material is close to the first coil, the magnetic field generated in the first coil is effectively enhanced as compared with the configuration in which the magnetic material is sufficiently separated from the first coil.
  • the magnetic material is located outside the first coil when viewed in the direction of the central axis of the first coil (that is, in a plan view). According to the above aspect, since the magnetic material is located outside the first coil, the limitation on the shape of the first coil is relaxed.
  • the performance operation device includes a movable member that is displaced according to a performance operation, a detected portion that is installed on the movable member and includes a first coil, and a magnetic field due to the supply of an electric current. It is installed in at least one of the movable member and the signal generation unit, and a signal generation unit that includes a second coil that generates a detection signal and generates a detection signal at a level corresponding to the distance between the detected unit and the second coil. It is provided with a magnetic material.
  • the keyboard instrument is a key that is displaced according to a playing operation, a detected portion that is installed on the key and includes a first coil, and a magnetic field is generated by supplying an electric current.
  • a signal generation unit that includes a second coil and generates a detection signal at a level corresponding to the distance between the detected unit and the second coil, and a magnetic material installed in at least one of the key and the signal generation unit.
  • a sound generating unit that generates a sound corresponding to the detection signal is provided.
  • Second coil, 62, 63 ... Capacitive element, 64 ... Wiring board, 65 ... Base material, 66 ... Wiring pattern, 71 (71a, 71b), 72 (72a, 72b) ... Fixing member, 80 ... Support, 81 ... Bottom surface, 82a, 82b ... Side wall, 83 ... Rear wall, 84 ... Protrusion, 85 ... Holding protrusion, 87 (87a, 87b) ... Through hole, 91 ... String striking mechanism, 911 ... Hammer, 912 ... Transmission mechanism , 913 ... Support member, 92 ... Pedal mechanism, 921 ... Pedal, 922 ... Support member, 923 ... Elastic body.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
PCT/JP2020/041035 2019-11-20 2020-11-02 検出システム、演奏操作装置および鍵盤楽器 Ceased WO2021100448A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2021558263A JP7392736B2 (ja) 2019-11-20 2020-11-02 鍵盤楽器
EP20890153.8A EP4064272B1 (en) 2019-11-20 2020-11-02 Detection system, musical performance operating device, and keyboard instrument
CN202080078686.XA CN114730555A (zh) 2019-11-20 2020-11-02 检测系统、演奏操作装置及键盘乐器
US17/746,207 US20220277717A1 (en) 2019-11-20 2022-05-17 Detection system, musical instrument playing apparatus, and musical keyboard instrument
JP2023117415A JP7544206B2 (ja) 2019-11-20 2023-07-19 検出システムおよび鍵盤楽器

Applications Claiming Priority (2)

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JP2019209680 2019-11-20
JP2019-209680 2019-11-20

Related Child Applications (1)

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US17/746,207 Continuation US20220277717A1 (en) 2019-11-20 2022-05-17 Detection system, musical instrument playing apparatus, and musical keyboard instrument

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20200320966A1 (en) * 2017-12-20 2020-10-08 Sonuus Limited Keyboard sensor systems and methods
WO2023052409A1 (en) * 2021-10-01 2023-04-06 Stefek Palo Alternative current motion sensing systems for keyboard musical instruments

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021081615A (ja) * 2019-11-20 2021-05-27 ヤマハ株式会社 演奏操作装置
WO2021100868A1 (ja) * 2019-11-20 2021-05-27 ヤマハ株式会社 鍵盤装置の鍵操作の検出装置、鍵操作の検出方法、および鍵盤装置
JP7302739B2 (ja) * 2020-03-26 2023-07-04 ヤマハ株式会社 変位センサーおよび電子楽器
JP7571952B2 (ja) * 2020-06-27 2024-10-23 信之 竹本 リズム音発生装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58154909A (ja) * 1982-03-10 1983-09-14 Hitachi Ltd 可変利得制御可能な増幅回路
JPS6411300A (en) * 1987-07-03 1989-01-13 Mine Gomi Touch response apparatus for keyed instrument
JPH03223796A (ja) * 1989-12-29 1991-10-02 Yamaha Corp 電子楽器の鍵盤装置
JPH06323803A (ja) 1993-05-14 1994-11-25 K G S Kk 移動体の位置検出装置
US5449858A (en) * 1993-12-30 1995-09-12 Edward E. Haddock, Jr. Guitar feedback device and method
JP2008249852A (ja) * 2007-03-29 2008-10-16 Yamaha Corp 楽音発生装置及び鍵盤楽器
US20140245877A1 (en) * 2013-03-04 2014-09-04 William Gelvin Pickup for stringed instrument

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838139A (en) * 1986-03-18 1989-06-13 Sensor Technologies, Inc. Musical keyboard
JP2822442B2 (ja) * 1989-05-02 1998-11-11 ヤマハ株式会社 鍵盤装置
US6610917B2 (en) * 1998-05-15 2003-08-26 Lester F. Ludwig Activity indication, external source, and processing loop provisions for driven vibrating-element environments
JP2014169900A (ja) * 2013-03-01 2014-09-18 Aisan Ind Co Ltd 位置センサ
JP6146289B2 (ja) * 2013-12-11 2017-06-14 ヤマハ株式会社 加振器の取付構造
CN106165266B (zh) * 2014-10-10 2019-01-08 株式会社安川电机 电机和电机用编码器
GB2570533B (en) * 2017-12-20 2021-09-22 Sonuus Ltd Keyboard sensor systems and methods
JP2021081615A (ja) * 2019-11-20 2021-05-27 ヤマハ株式会社 演奏操作装置
WO2021100472A1 (ja) * 2019-11-20 2021-05-27 ヤマハ株式会社 演奏操作装置および鍵盤楽器
EP4064270A4 (en) * 2019-11-20 2023-12-20 Yamaha Corporation DETECTION SYSTEM, GAME OPERATION DEVICE, ELECTRONIC KEYBOARD INSTRUMENT AND DETECTION METHOD
JP7327646B2 (ja) * 2020-03-12 2023-08-16 ヤマハ株式会社 変位センサーおよび演奏操作装置
JP7302739B2 (ja) * 2020-03-26 2023-07-04 ヤマハ株式会社 変位センサーおよび電子楽器
JP2022060655A (ja) * 2020-10-05 2022-04-15 ヤマハ株式会社 回路基板および検出システム
JP7631877B2 (ja) * 2021-02-22 2025-02-19 ヤマハ株式会社 演奏検出システムおよび鍵盤楽器
CN117321677A (zh) * 2021-05-19 2023-12-29 雅马哈株式会社 乐器
JP7586308B2 (ja) * 2021-05-19 2024-11-19 ヤマハ株式会社 楽器
CN119173940A (zh) * 2022-05-24 2024-12-20 雅马哈株式会社 检测系统和乐器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58154909A (ja) * 1982-03-10 1983-09-14 Hitachi Ltd 可変利得制御可能な増幅回路
JPS6411300A (en) * 1987-07-03 1989-01-13 Mine Gomi Touch response apparatus for keyed instrument
JPH03223796A (ja) * 1989-12-29 1991-10-02 Yamaha Corp 電子楽器の鍵盤装置
JPH06323803A (ja) 1993-05-14 1994-11-25 K G S Kk 移動体の位置検出装置
US5449858A (en) * 1993-12-30 1995-09-12 Edward E. Haddock, Jr. Guitar feedback device and method
JP2008249852A (ja) * 2007-03-29 2008-10-16 Yamaha Corp 楽音発生装置及び鍵盤楽器
US20140245877A1 (en) * 2013-03-04 2014-09-04 William Gelvin Pickup for stringed instrument

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4064272A4

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200320966A1 (en) * 2017-12-20 2020-10-08 Sonuus Limited Keyboard sensor systems and methods
US20220246122A1 (en) * 2017-12-20 2022-08-04 Sonuus Limited Keyboard sensor systems and methods
US11657789B2 (en) * 2017-12-20 2023-05-23 Sonuus Limited Keyboard sensor systems and methods
US12112732B2 (en) * 2017-12-20 2024-10-08 Sonuus Limited Keyboard sensor systems and methods
WO2023052409A1 (en) * 2021-10-01 2023-04-06 Stefek Palo Alternative current motion sensing systems for keyboard musical instruments

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