WO2022176740A1 - 検出システムおよび鍵盤楽器 - Google Patents
検出システムおよび鍵盤楽器 Download PDFInfo
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- WO2022176740A1 WO2022176740A1 PCT/JP2022/005148 JP2022005148W WO2022176740A1 WO 2022176740 A1 WO2022176740 A1 WO 2022176740A1 JP 2022005148 W JP2022005148 W JP 2022005148W WO 2022176740 A1 WO2022176740 A1 WO 2022176740A1
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- detection
- board
- coil
- substrate
- detected
- Prior art date
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- 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
-
- 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
- G10H1/18—Selecting circuits
- G10H1/182—Key multiplexing
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- 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
-
- 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
Definitions
- the present disclosure relates to technology for detecting performance actions.
- Patent Literature 1 discloses a configuration in which a sensor for detecting displacement of keys of a keyboard instrument is installed on a circuit board.
- the circuit board is provided with an integrated circuit for processing detection signals from each sensor.
- one of the objects of one aspect of the present disclosure is to miniaturize a substrate on which an element for detecting displacement of a movable member is installed.
- a detection system is provided on a movable member that is displaced by a user's playing motion, and is formed of a magnetic material or a conductive material.
- a detection board having a detection coil facing a detected part and a detection circuit for generating a detection signal corresponding to a distance between the detection coil and the detected part, and a control board separate from the detection board.
- a control board having a control IC for generating displacement data representing the position of the movable member from the detection signal; and a wiring section including wiring for transmitting the detection signal from the detection board to the control board.
- a detection system corresponds to a first detected portion corresponding to a first movable member that is displaced by a user's playing motion, and a second movable member that is displaced by the user's playing motion.
- a plurality of detected parts made of a magnetic material or a conductor; a first detection coil facing the first detected part; and a second detected part facing the second detected part.
- 2 detection coils a first detection signal according to the distance between the first detected portion and the first detection coil, and a second detection according to the distance between the second detected portion and the second detection coil a detection circuit for generating a signal; and a control board separate from the detection board, the control board generating first displacement data representing the position of the first movable member from the first detection signal.
- a control board having a control IC for generating second displacement data representing the position of the second movable member from the second detection signal; and a control board for receiving the first detection signal and the second detection signal from the detection board. and a wiring section including wiring for transmitting to.
- a keyboard instrument includes a plurality of keys including a first key and a second key, a first detected part corresponding to the first key, and a second detection part corresponding to the second key. a plurality of detected portions formed of a magnetic material or a conductor; a first detection coil facing the first detected portion; and a second detecting portion facing the second detected portion.
- a coil a first detection signal according to the distance between the first detection part and the first detection coil, and a second detection signal according to the distance between the second detection part and the second detection coil, a detection circuit to generate a detection board on which a detection circuit is installed; and a control board separate from the detection board, wherein first displacement data representing the position of the first key is generated from the first detection signal, a control board installed with a control IC for generating second displacement data representing the position of the second key from the second detection signal; and a control board for receiving the first detection signal and the second detection signal from the detection board. and a reproduction control unit that causes a reproduction device to reproduce sound corresponding to the first displacement data and the second displacement data.
- FIG. 1 is a plan view of a keyboard instrument according to a first embodiment
- FIG. 2 is a plan view of the keyboard device viewed from above in the vertical direction
- FIG. 1 is a plan view of a keyboard instrument viewed from below in a vertical direction
- FIG. 4 is a side view of the keyboard unit
- FIG. 1 is a circuit diagram of a resonant circuit
- FIG. 1 is a block diagram illustrating an electrical configuration of a keyboard instrument
- FIG. 4 is a circuit diagram illustrating the configuration of an input-side filter
- FIG. 3 is a block diagram illustrating the configuration of a drive circuit
- FIG. 4 is a circuit diagram illustrating the configuration of an output-side filter
- FIG. 3 is a block diagram illustrating an internal configuration of a control IC
- FIG. 1 is a plan view of a keyboard instrument according to a first embodiment
- FIG. 2 is a plan view of the keyboard device viewed from above in the vertical direction
- FIG. 1 is a plan view of a keyboard
- FIG. 11 is a side view of the keyboard unit in the third embodiment.
- FIG. 5 is a schematic diagram of a string-striking mechanism according to a modification; It is a schematic diagram of the pedal mechanism which concerns on a modification.
- FIG. 1 is a plan view of a keyboard instrument 100 according to a first embodiment.
- a keyboard instrument 100 is an electronic musical instrument that includes a keyboard device 11 , a housing 12 , a tone generator device 13 and a playback device 14 .
- the housing 12 is a hollow structure that supports and houses the keyboard device 11, the sound source device 13, and the playback device .
- the keyboard device 11 comprises a plurality of keys 41 including a plurality of white keys and a plurality of black keys.
- Each of the plurality of keys 41 is an operator that is displaced in the vertical direction in accordance with a user's performance operation (for example, key depression and key release).
- a user's performance operation for example, key depression and key release.
- the X-axis and the Y-axis are orthogonal to each other in the horizontal plane.
- the X-axis extends in the left-right direction of the user, and the Y-axis extends in the front-back direction of the user.
- a plurality of keys 41 elongated in the Y-axis direction are arranged along the X-axis.
- a keyboard is configured by an arrangement of a plurality of keys 41 .
- the keyboard device 11 generates displacement data representing the position of each key 41 in the vertical direction for each of the plurality of keys 41 .
- the sound source device 13 generates an acoustic signal according to the displacement data. Specifically, the sound source device 13 generates an acoustic signal representing the sound of the pitch corresponding to the key 41 pressed by the user among the plurality of pitches corresponding to the different keys 41 .
- the reproducing device 14 is a speaker that reproduces the sound represented by the acoustic signal.
- a playback device 14 headphones or earphones, for example
- a playback device 14 configured separately from the keyboard instrument 100 may be connected to the keyboard instrument 100 by wire or wirelessly.
- FIG. 2 is a plan view of the keyboard device 11 viewed from above in the vertical direction
- FIG. 3 is a plan view of the keyboard device 11 viewed from below in the vertical direction.
- the keyboard device 11 includes a plurality of keyboard units U (UL, UM, UH), a control board 20, a wiring section 30, a relay section 31L and a relay section 31H.
- a plurality of keyboard units U are configured separately from each other.
- a plurality of keyboard units U are interconnected along the X axis.
- the keyboard unit UM is positioned between the keyboard unit UL and the keyboard unit UH.
- the keyboard unit UL has a plurality of keys 41 corresponding to the low range.
- the keyboard unit UM has a plurality of keys 41 corresponding to the middle range.
- the keyboard unit UH has a plurality of keys 41 corresponding to the upper register.
- FIG. 4 is a side view illustrating the configuration of the keyboard unit U.
- Each keyboard unit U has a common configuration.
- FIG. 4 shows the configuration of the keyboard unit UM for convenience.
- the keyboard unit U includes a plurality of operating mechanisms 40 , a detection board 50 and a support 60 .
- Each of the plurality of operating mechanisms 40 is a mechanism that operates according to the user's playing motion, and includes a key 41 (white key or black key), a weight member 42 and a substrate 43 to be detected.
- a weight member 42 and a substrate to be detected 43 are installed corresponding to each of the plurality of keys 41 . That is, the keyboard unit U includes a weight member 42 and a substrate 43 to be detected for each key 41 .
- the support 60 is a structure (frame) that supports the multiple operating mechanisms 40 and the detection substrate 50 .
- the key 41 is an elongated member including a front end portion 41a and a rear end portion 41b, and is supported by the support 60 with the connecting portion 61 as a fulcrum.
- the front end 41a is the end near the user playing the keyboard instrument 100
- the rear end 41b is the end opposite to the front end 41a.
- the connecting portion 61 is an elastically deformable portion that connects the rear end portion 41 b and the support body 60 .
- the displacement data is data representing the position of the front end portion 41a in the vertical direction.
- the key 41 is provided with a projecting portion 44 projecting downward in the vertical direction.
- the weight member 42 is an elongated member (counterweight) including a front end portion 42a and a rear end portion 42b.
- a weight member 42 corresponding to each key 41 is installed below the key 41 .
- the front end 42a is the end closer to the user, and the rear end 42b is the end opposite to the front end 42a.
- a portion of the weight member 42 between the front end portion 42 a and the rear end portion 42 b is pivotally supported by the support body 60 .
- the weight member 42 is rotatable around a rotation shaft 62 along the X axis.
- An adjustment weight 45 is installed at the rear end portion 42b of the weight member 42.
- the rear end portion 42b of the weight member 42 is urged downward in the vertical direction by the weight of the adjustment weight 45. As shown in FIG. Therefore, the rear end portion 42 b of the weight member 42 is maintained in a state where it is placed on the placement portion 63 (stopper) installed on the support 60 .
- the front end portion 41a of the key 41 is lowered by the user's key depression, the front end portion 42a of the weight member 42 is pressed by the protrusion 44, and as a result, the weight member 42 rotates against the bias of the adjustment weight 45. move. That is, the front end portion 42a of the weight member 42 moves downward.
- the weight member 42 corresponding to each key 41 is displaced according to the displacement of the key 41 concerned.
- the substrate to be detected 43 is installed on the weight member 42 . Specifically, the substrate to be detected 43 is installed on the lower surface of the front end portion 42 a of the weight member 42 . Therefore, the substrate to be detected 43 moves according to the performance operation by the user. For example, the substrate to be detected 43 moves downward in the vertical direction when the user presses the key, and moves upward in the vertical direction when the user releases the key.
- the displacement data can also be referred to as data representing the position of the front end portion 42a in the vertical direction.
- the substrate to be detected 43 is a circuit substrate on which a resonance circuit 71 is installed. A plurality of resonance circuits 71 (substrates to be detected 43) corresponding to different keys 41 are arranged in the X-axis direction.
- the detection board 50 is an elongated circuit board extending in the direction of the X-axis over the multiple keys 41 of the keyboard unit U. In other words, while the detection substrate 43 is installed individually for each key 41 , the detection substrate 50 is continuous over a plurality of keys 41 .
- the detection board 50 is fixed to the support 60 below the multiple keys 41 . That is, the detection board 50 overlaps the plurality of keys 41 in plan view from the vertical direction. Specifically, the detection board 50 overlaps the front end portion 41a of each key 41 in plan view. Further, the detection substrate 50 is fixed to the support 60 below the plurality of weight members 42 .
- the detection board 50 is fixed to the support 60 at a position closer to the front ends 41a than the rear ends 41b of the plurality of keys 41 . That is, the detection substrate 50 overlaps the plurality of weight members 42 in plan view from the vertical direction. Specifically, the detection substrate 50 overlaps the front end portion 42a of the weight member 42 on which the substrate to be detected 43 is installed in plan view. Therefore, the plurality of substrates to be detected 43 and the detection substrate 50 face each other with a gap in the vertical direction. As described above, in the first embodiment, the detection board 50 is installed below the plurality of weight members 42 , so the detection board 50 can be installed without hindering the displacement of each key 41 or each weight member 42 .
- the detection board 50 includes a plurality of resonance circuits 75, a detection circuit 51, and a wiring board 52.
- the wiring board 52 is a rigid board having a plurality of wirings formed on its surface or inside.
- a plurality of resonance circuits 75 and the detection circuit 51 are installed on the wiring board 52 .
- the detection board 50 is configured separately for each keyboard unit U.
- the wiring board 52 is configured by a separate board for each keyboard unit U.
- the detection board 50 of the keyboard unit UL is referred to as “detection board 50L”
- the detection board 50 of keyboard unit UM is referred to as “detection board 50M”
- the detection board 50 of keyboard unit UH is referred to as “detection board 50L”.
- 50H may be written.
- the detection substrate 50L, the detection substrate 50M, and the detection substrate 50H are separate elements that are manufactured independently of each other.
- the detection board 50 is configured as a single board, a very long detection board 50 covering all the keys 41 of the keyboard instrument 100 is required, and the manufacture or handling of the detection board 50 is difficult. Since the keyboard instrument 100 of the first embodiment comprises a plurality of detection boards 50 that are separate from each other, there is an advantage that each detection board 50 is easy to manufacture or handle.
- a resonance circuit 75 is installed for each key 41 . That is, a plurality of resonance circuits 75 corresponding to different keys 41 are arranged in the X-axis direction. As can be understood from the above description, a set of resonance circuit 71 and resonance circuit 75 is installed for each key 41 .
- FIG. 5 is a circuit diagram of the resonant circuit 71 and the resonant circuit 75.
- FIG. Resonant circuit 71 includes a coil 711 to be detected and a capacitive element 712 . Specifically, both ends of the coil 711 to be detected and both ends of the capacitive element 712 are connected to each other. That is, one end of the coil 711 to be detected is connected to one end of the capacitive element 712 , and the other end of the coil 711 to be detected is connected to the other end of the capacitive element 712 .
- the detected coil 711 is, for example, a coil configured by a conductor pattern formed on the surface of or inside the detected substrate 43 . However, coil to be detected 711 may be formed by winding a conducting wire.
- the detected coil 711 is installed on the weight member 42 .
- the detected coil 711 is an example of the "detected portion”.
- the coil 711 to be detected, the detection board 50, the control board 20, and the wiring section 30 constitute a “detection system” for detecting the playing motion of the user.
- the keyboard device 11 may be interpreted as a "detection system”.
- the resonance circuit 75 includes an input terminal T1, an output terminal T2, a resistive element 751, a detection coil 752, a capacitive element 753, and a capacitive element 754.
- One end of the resistive element 751 is connected to the input terminal T 1
- the other end of the resistive element 751 is connected to one end of the capacitive element 753 and one end of the detection coil 752 .
- the other end of the detection coil 752 is connected to the output terminal T 2 and one end of the capacitive element 754 .
- the other end of the capacitive element 753 and the other end of the capacitive element 754 are grounded (Gnd).
- the detection coil 752 is, for example, a coil configured by a conductor pattern formed on the detection substrate 50 .
- the resonance frequency of the resonance circuit 75 and the resonance frequency of the resonance circuit 75 are equivalent frequencies. However, the resonance frequency of the resonance circuit 75 and the resonance frequency of the resonance circuit 75 may be different. Also, the detection coil 752 may be configured by winding a
- the coil 711 to be detected and the detection coil 752 corresponding to one key 41 face each other with a gap in the vertical direction.
- the substrate to be detected 43 moves in the vertical direction in accordance with the playing motion of the user. Therefore, the distance between the coil 711 to be detected and the detection coil 752 changes according to the playing motion of the user. Specifically, the distance between the detected coil 711 and the detection coil 752 decreases when the user presses the key, and increases when the user releases the key.
- a reference signal R is supplied to the input terminal T1 of each resonance circuit 75.
- the reference signal R periodically fluctuates in signal level.
- a periodic signal having an arbitrary waveform such as a sine wave is used as the reference signal R, for example.
- the frequency Fr of the reference signal R is set to a frequency substantially equal to the resonance frequencies of the resonance circuits 71 and 75 .
- the reference signal R is supplied to the detection coil 752 via the input terminal T1 and the resistive element 751.
- a magnetic field is generated in the detection coil 752 by supplying the reference signal R.
- FIG. An induced current is generated in the detected coil 711 of the resonance circuit 71 by electromagnetic induction due to the magnetic field generated in the detection coil 752 . That is, a magnetic field is generated in the detected coil 711 in a direction that cancels out the change in the magnetic field of the detection coil 752 .
- the magnetic field generated in the detected coil 711 changes according to the distance between the detected coil 711 and the detection coil 752 . Accordingly, a detection signal d having an amplitude .delta.
- the detection signal d is a periodic signal whose level fluctuates at the same frequency Fr as the reference signal R.
- the control board 20 is installed on the support 60 of one keyboard unit UM among the plurality of keyboard units U corresponding to the middle range. That is, the support 60 of the keyboard unit UM supports the plurality of keys 41, the detection board 50, and the control board 20.
- FIG. As illustrated in FIGS. 2 and 3, the control board 20 is not installed in the keyboard unit UL and the keyboard unit UH. That is, the support 60 of each of the keyboard unit UL and keyboard unit UH supports the multiple keys 41 and the detection board 50 . Any method may be used to fix the control board 20 to the support 60 .
- the control board 20 is fixed to the support 60 by any structure such as screw, snap fit, slide or engagement.
- the control board 20 is fixed to the support 60 of the keyboard unit UM on the rear end portion 41b side of the plurality of keys 41 of the keyboard unit UM. That is, the control board 20 is fixed to the support 60 at a position closer to the rear end 41b of each key 41 than to the front end 41a. Specifically, the control board 20 is installed on the rear surface 60a located near the rear end 41b of each key 41 on the support 60 of the keyboard unit UM. As can be understood from the above description, the control board 20 does not overlap the detection board 50 in a plan view with respect to the detection board 50 .
- a fixed plate 65 is installed on the back surface 60 a of the support 60 , and the control board 20 is fixed to the surface of the fixed plate 65 . That is, the control board 20 is indirectly fixed to the support 60 via the fixing plate 65 .
- the fixed plate 65 is, for example, a plate-like member made of metal.
- the fixed plate 65 is formed into a specific shape by a known manufacturing method such as sheet metal processing.
- the control board 20 and the fixed plate 65 are electrically insulated.
- a fixing plate 65 is positioned between the detection board 50 and the control board 20 . According to the above configuration, since the fixed plate 65 functions as an electromagnetic shield, the influence of the control board 20 on the magnetic field around the detection coil 752 is reduced.
- FIG. 6 is a block diagram illustrating the electrical configuration of the keyboard instrument 100.
- the wiring portion 30, the relay portion 31L, and the relay portion 31H are shaded for convenience.
- the control board 20 includes a control IC 21 and a wiring board 22.
- the wiring board 22 is a rigid board having a plurality of wirings formed on its surface or inside.
- the wiring board 22 is fixed via a fixing plate 65 to the rear surface 60a of the support 60 of the keyboard unit UM.
- the control IC 21 is an integrated circuit (IC chip) mounted on the surface of the wiring board 22 .
- the control IC 21 is mounted on the surface of the wiring board 22 opposite to the support 60 of the keyboard unit UM.
- various mounted parts such as resistors, capacitive elements, diodes, coils, crystal oscillators, and connectors are mounted on the surface of the wiring board 22.
- control board 20 is configured separately from the detection board 50 of each keyboard unit U.
- the wiring board 22 of the control board 20 is formed of a board separate from the wiring board 52 of each detection board 50 .
- the wiring section 30 is a mounted component for electrically connecting the detection board 50M of the keyboard unit UM and the control board 20.
- a flexible cable such as FFC (Flexible Flat Cable) or FPC (Flexible Printed Circuit) is used as the wiring section 30 .
- the wiring portion 30 has a first end E1 and a second end E2.
- a first end E1 of the wiring portion 30 is connected to the detection substrate 50M (wiring substrate 52).
- the first end E1 of the wiring portion 30 is connected to the central portion of the detection substrate 50M in the X-axis direction.
- a second end E2 of the wiring portion 30 is connected to the wiring board 22 of the control board 20 .
- the wiring section 30 is positioned in a space below the plurality of keys 41 and the plurality of weight members 42 .
- the relay section 31L in FIG. 6 is a mounted component for electrically connecting the detection board 50L of the keyboard unit UL and the detection board 50M of the keyboard unit UM. Specifically, one end of the relay portion 31L is connected to the detection board 50L, and the other end of the relay portion 31L is connected to the detection board 50M.
- the relay section 31H is a mounting component for electrically connecting the detection board 50H of the keyboard unit UH and the detection board 50M of the keyboard unit UM. Specifically, one end of the relay portion 31H is connected to the detection board 50H, and the other end of the relay portion 31H is connected to the detection board 50M.
- the relay section 31L and the relay section 31H are flexible cables such as FFC or FPC.
- the detection circuit 51 On the detection board 50 (wiring board 22) of each keyboard unit U, the above-described resonance circuit 75 is installed for each key 41, and the detection circuit 51 is also installed.
- the detection circuit 51 generates a detection signal D corresponding to the distance between each detection coil 752 of the keyboard unit U and each coil 711 to be detected.
- the detection circuit 51 includes a drive circuit 53 , an input filter 54 and an output filter 55 .
- FIG. 7 is a circuit diagram illustrating the configuration of the input side filter 54.
- a reference signal Q is supplied from the control IC 21 to the input filter 54 .
- the reference signal Q is a periodic signal whose level fluctuates at the frequency Fr.
- the reference signal Q is a rectangular-wave digital signal whose signal level fluctuates from one of high level and low level to the other at frequency Fr.
- the input filter 54 is a circuit that generates a reference signal R from the reference signal Q, and includes an amplifier circuit 541 and a filter circuit 542 .
- the amplifier circuit 541 amplifies the reference signal Q.
- the filter circuit 542 is a low-pass filter that generates the reference signal R by suppressing the signal component on the high frequency side of the reference signal Q amplified by the amplifier circuit 541 .
- a ⁇ -type filter in which capacitive elements are connected to both ends of a coil is used as the filter circuit 542 .
- the reference signal R generated by the input filter 54 is an analog signal whose signal level changes continuously. Specifically, the reference signal R is a periodic signal with a waveform that approximates a sine wave.
- a reference signal R generated by the input filter 54 is supplied to the detection circuit 51 .
- FIG. 8 is a block diagram illustrating the configuration of the drive circuit 53. As shown in FIG. The configuration of the driving circuit 53 is common to a plurality of keyboard units U. As shown in FIG. The configuration shown in FIG. 8 is an example of the configuration of the drive circuit 53, and any circuit capable of outputting the detection signal d corresponding to the position of each key 41 is employed as the drive circuit 53.
- FIG. 8 is an example of the configuration of the drive circuit 53, and any circuit capable of outputting the detection signal d corresponding to the position of each key 41 is employed as the drive circuit 53.
- the drive circuit 53 may be composed of a single IC chip. Also, the number of resonance circuits 75 corresponding to each selection circuit S[n] may be different for each selection circuit S[n].
- a control signal A and a control signal B are supplied from the control IC 21 to each selection circuit S[n].
- the control signal A is a signal that designates one of the N selection circuits S[1] to S[N] of the drive circuit 53 in each keyboard unit U.
- FIG. Specifically, the control signal A sequentially designates each of the N selection circuits S[1] to S[N] for each period of a predetermined length (hereinafter referred to as "selection period").
- the control signal B is a signal that designates one of the plurality of resonance circuits 75 corresponding to one selection circuit S[n].
- each of the plurality of resonance circuits 75 corresponding to the selection circuit S[n] is sequentially designated by the control signal B during the selection period during which the selection circuit S[n] is selected.
- the selection circuit S[n] selected by the control signal A sequentially selects the plurality of resonance circuits 75 corresponding to the selection circuit S[n] in synchronization with the control signal B, and is in the selected state.
- a reference signal R is applied to the input terminal T1 of the resonant circuit 75; The cycle of the reference signal R is sufficiently short compared to the length of time during which one resonance circuit 75 is selected by the selection circuit S[n].
- the selection circuit S[n] also supplies the output filter 55 with the detection signal d output from the output terminal T2 of the resonance circuit 75 in the selected state.
- the detection signal d generated by each resonance circuit 75 is sequentially supplied to the output filter 55 in a time division manner for each resonance circuit 75 .
- the detection signal d is a periodic signal whose signal level fluctuates at the same frequency Fr as the reference signal R.
- FIG. 9 is a circuit diagram illustrating the configuration of the output filter 55.
- the output-side filter 55 is a filter circuit that generates the detection signal D from the detection signal d supplied from the drive circuit 53 .
- the output-side filter 55 includes a rectifying element 551 , a capacitive element 552 and a low-pass filter 553 .
- the rectifying element 551 is a diode element that rectifies (half-wave or full-wave rectifying) the detection signal d.
- the capacitive element 552 temporally smoothes the detection signal d after rectification by the rectifying element 551 .
- the low-pass filter 553 is composed of a combination of a capacitive element and a resistive element, and generates a detection signal D by suppressing signal components on the high frequency side of the smoothed detection signal d.
- detection signals D are generated whose signal levels fluctuate according to the amplitude ⁇ of each detection signal d.
- the amplitude ⁇ of the detection signal d depends on the distance between the coil 711 to be detected and the detection coil 752 .
- the detection signal D is a signal that is set to a signal level corresponding to the distance between the coil 711 to be detected and the detection coil 752 in a time division manner.
- a detection signal D is generated in parallel in the detection circuit 51 of each of the plurality of keyboard units U.
- FIG. 10 is a block diagram illustrating the internal configuration of the control IC 21.
- the control IC 21 includes a control device 23 , a memory device 24 , a signal generation circuit 25 and an A/D converter 26 .
- the control IC 21 may be configured by a single IC chip, or may be configured by a plurality of IC chips configured separately from each other.
- the control device 23 is composed of one or more processors that control each element of the keyboard instrument 100 .
- processors such as CPU (Central Processing Unit), SPU (Sound Processing Unit), DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), or ASIC (Application Specific Integrated Circuit)
- CPU Central Processing Unit
- SPU Sound Processing Unit
- DSP Digital Signal Processor
- FPGA Field Programmable Gate Array
- ASIC Application Specific Integrated Circuit
- the storage device 24 is a single or multiple memories that store programs executed by the control device 23 and data used by the control device 23 .
- the storage device 24 is composed of a known recording medium such as a semiconductor recording medium.
- the control device 23 may implement the functions of the tone generator device 13 by executing a program stored in the storage device 24 .
- the sound source device 13 and the control device 23 that implements the functions of the sound source device 13 function as a “playback control unit” that causes the playback device 14 to play back sounds according to the displacement data of each key 41 .
- the signal generation circuit 25 generates various signals under the control of the control device 23. Specifically, the signal generation circuit 25 generates a control signal A, a control signal B, and a reference signal Q. FIG. Note that the control device 23 may implement the function of the signal generation circuit 25 by executing a program stored in the storage device 24 .
- the A/D converter 26 converts the detection signal D supplied from the detection circuit 51 of each keyboard unit U from an analog signal to digital data (hereinafter referred to as "detection data"). Detection data is generated for each key 41 . That is, a time series of detection data is generated for each of the plurality of keys 41 . The control device 23 generates displacement data from the time series of detection data of each key 41 .
- the control signal A generated by the signal generation circuit 25 is transmitted from the control board 20 to the detection board 50M via the wiring section 30, and supplied to the detection circuit 51 (each selection circuit S[n]) of the detection board 50M. . Further, the control signal A transmitted from the control board 20 to the detection board 50M is transmitted from the detection board 50M to the detection board 50L via the relay section 31L, and the detection circuit 51 of the detection board 50L (each selection circuit S[n ]). Similarly, the control signal A transmitted from the control board 20 to the detection board 50M is transmitted from the detection board 50M to the detection board 50H via the relay section 31H, and the detection circuit 51 (each selection circuit S[ n]).
- control signal A is supplied in parallel to the detection circuits 51 of the keyboard units U, respectively.
- control signal B is supplied from the control board 20 through the wiring section 30 to the detection circuit 51 of the detection board 50M.
- the control signal B is supplied from the detection board 50M to the detection circuit 51 of the detection board 50L through the relay section 31L, and is supplied from the detection board 50M to the detection circuit 51 of the detection board 50H through the relay section 31H. That is, the control signal B is supplied in parallel to the detection circuits 51 of the plurality of keyboard units U.
- the reference signal Q generated by the signal generation circuit 25 is transmitted from the control board 20 to the detection board 50M via the wiring section 30 and supplied to the detection circuit 51 (input side filter 54) of the detection board 50M. Further, the reference signal Q transmitted from the control board 20 to the detection board 50M is transmitted from the detection board 50M to the detection board 50L via the relay section 31L and supplied to the detection circuit 51 of the detection board 50L. Similarly, the reference signal Q transmitted from the control board 20 to the detection board 50M is transmitted from the detection board 50M to the detection board 50H via the relay section 31H and supplied to the detection circuit 51 of the detection board 50H. That is, the reference signal Q is supplied in parallel to the detection circuit 51 (input side filter 54) of each of the plurality of keyboard units U. As shown in FIG.
- a detection signal D generated by the detection circuit 51 of the detection board 50M is transmitted from the detection board 50M to the control board 20 via the wiring section 30 and supplied to the A/D converter 26 of the control IC 21.
- the detection signal D generated by the detection circuit 51 of the detection board 50L is transmitted from the detection board 50L to the detection board 50M via the relay section 31L.
- the detection signal D transmitted from the detection board 50L to the detection board 50M is transmitted from the detection board 50M to the control board 20 via the wiring section 30 and supplied to the A/D converter 26 of the control IC 21.
- the detection signal D generated by the detection circuit 51 of the detection board 50H is transmitted to the control board 20 via the relay section 31H, the detection board 50M and the wiring section 30, and is sent to the A/D converter 26 of the control IC 21. supplied.
- the detection signal D generated by the detection circuit 51 of each keyboard unit U is supplied in parallel from the keyboard units U to the control board 20 .
- a detection signal D generated by each detection circuit 51 of the detection substrate 50L and the detection substrate 50H is supplied to the control substrate 20 via the detection substrate 50M and the wiring section 30.
- the relay section 31L transmits the detection signal D generated by the detection circuit 51 of the detection board 50L from the detection board 50L to the detection board 50M.
- the relay section 31H transmits the detection signal D generated by the detection circuit 51 of the detection board 50H from the detection board 50H to the detection board 50M.
- the wiring unit 30 transmits to the control board 20 the detection signal D generated by the detection circuit 51 of the detection board 50M and the detection signal D transmitted to the detection board 50M from each of the detection boards 50L and 50H.
- the detection board 50L and the detection board 50H are examples of the "first detection board", and the detection board 50M is an example of the "second detection board".
- the detection circuit 51 of each of the detection substrates 50L and 50H is an example of the "first detection circuit”
- the detection circuit 51 of the detection substrate 50M is an example of the "second detection circuit”.
- the control IC 21 that generates displacement data is installed on the control board 20 that is separate from the detection board 50 on which the detection coil 752 is installed. Therefore, it is easier to miniaturize the detection board 50 compared to a configuration in which the control IC 21 is installed on the control board 20, for example. In addition, since it is easier to secure the distance between the detection coil 752 and the control IC 21 compared to the configuration in which the control IC 21 is installed on the detection substrate 50, the influence of the control IC 21 on the magnetic field around the detection coil 752 is reduced. Therefore, displacement data can be generated with high accuracy.
- the detection coil 752 and the control IC 21 are separated from each other in comparison with the configuration in which the detection board 50 and the control board 20 overlap in a plan view. You can easily keep your distance. Therefore, the effect of reducing the influence of the control IC 21 on the magnetic field around the detection coil 752 is particularly remarkable.
- the detection signal D generated by the detection circuit 51 of each of the detection substrates 50L and 50H and the detection signal D generated by the detection circuit 51 of the detection substrate 50M are combined with the detection substrate 50M. It is supplied to the control board 20 via the wiring section 30 between the control board 20 and the control board 20 . According to the above configuration, it is not necessary to directly connect each of the detection board 50L and the detection board 50H and the control board 20 . Therefore, it is easier to reduce the size of the control board 20 compared to a configuration in which the detection board 50L, the detection board 50M, and the detection board 50H are individually connected to the control board 20. FIG. However, each of the plurality of detection boards 50 (50L, 50M, 50H) may be individually connected to the control board 20. FIG.
- the detection board 50 and the control board 20 are supported by the support 60 that supports the multiple keys 41 . Therefore, the structure of the keyboard instrument 100 is simplified compared to a structure in which each of the detection board 50 and the control board 20 is supported by a structure separate from the support 60 that supports the keys 41 . Particularly in the first embodiment, the detection board 50 is installed below the plurality of keys 41 , and the control board 20 is installed on the rear end side of the plurality of keys 41 . In the above configuration, although the detection board 50 and the control board 20 are supported by the common support 60, the distance between each detection coil 752 of the detection board 50 and the control IC 21 of the control board 20 is ensured. easy. Therefore, the influence of the control IC 21 on the magnetic field around the detection coil 752 can be effectively reduced. Note that the detection substrate 50 and the control substrate 20 may be supported by a structure separate from the support 60 .
- FIG. 11 is a plan view of the coil 78 in the second embodiment.
- the coil 78 of FIG. 11 is used as one or the other of the detection coil 752 and the coil 711 to be detected.
- Other configurations are the same as those of the first embodiment. Therefore, the same effects as in the first embodiment are realized in the second embodiment as well.
- the coil 78 includes a first portion 781 , a second portion 782 and a connection portion 783 .
- Each of the first portion 781 and the second portion 782 is formed in a rectangular spiral shape.
- Each of the first portion 781 and the second portion 782 is a conductor pattern spiraling counterclockwise from the center to the outside.
- the first portion 781 and the second portion 782 are adjacent to each other along the Y-axis.
- the connecting portion 783 is a conductor pattern formed in a layer separate from the first portion 781 and the second portion 782 .
- the connecting portion 783 electrically connects the center-side end of the first portion 781 and the center-side end of the second portion 782 .
- a magnetic field is generated in each of the first portion 781 and the second portion 782 due to the supply of current.
- the direction a1 of the current flowing through the first portion 781 and the direction a2 of the current flowing through the second portion 782 are opposite to each other. Therefore, magnetic fields in opposite directions are generated in the first portion 781 and the second portion 782 .
- a magnetic field directed from one of the first portion 781 and the second portion 782 to the other is formed, diffusion of the magnetic field across the keys 41 adjacent in the X-axis direction is reduced. That is, magnetic field interference between two coils 78 adjacent to each other is reduced. Therefore, it is possible to generate the detection signal d that reflects the position of each of the plurality of keys 41 with high precision.
- FIG. 12 is a side view illustrating the configuration of a keyboard unit U according to a third embodiment.
- a spacer 66 is installed on the detection board 50M of the keyboard unit UM in the third embodiment.
- the spacer 66 is a member that is interposed between the detection substrate 50M and the wiring portion 30 to secure a gap therebetween.
- the spacer 66 is positioned between the portion of the wiring portion 30 other than the first end E1 connected to the detection substrate 50M and the detection substrate 50M.
- the spacer 66 is made of an insulating material that is softer than the detection board 50 (wiring board 52), and can be deformed by being pressed by one or both of the detection board 50M and the wiring section 30.
- the same effects as in the first embodiment are also achieved in the third embodiment.
- the signal transmitted by the wiring section 30 may affect the magnetic field around the detection coil 752 .
- the spacer 66 is installed between the detection board 50M and the wiring section 30, a sufficient space is secured between the detection board 50M and the wiring section 30. FIG. Therefore, the influence of the wiring portion 30 on the magnetic field around the detection coil 752 can be effectively reduced.
- control IC 21 generates displacement data
- the function of the control IC 21 is not limited to the above examples.
- a part or all of the functions of the tone generator device 13 may be installed in the control IC 21 , and the control IC 21 may also be installed with a function of generating performance data in MIDI format from the displacement data of each key 41 .
- control board 20 is installed on the support 60 of the keyboard unit UM, but the place where the control board 20 is installed is not limited to the above example.
- the control board 20 is installed on various members that make up the keyboard instrument 100 .
- the housing 12 of the keyboard instrument 100, the lid portion that is rotatably supported by the housing 12 and covers the keyboard, or the shelf board of the keyboard instrument 100, or any other member of the keyboard instrument 100 has a control board. 20 is installed.
- the coil to be detected 711 (substrate to be detected 43) is installed on the weight member 42, but the member (movable member) on which the coil to be detected 711 is installed is not limited to the above examples.
- the substrate to be detected 43 may be installed on each key 41 .
- Another example of the member on which the detected coil 711 is installed will be described below.
- FIG. 13 is a schematic diagram illustrating the string-striking mechanism 91 of the keyboard instrument 100.
- the string-striking mechanism 91 is an action mechanism that strikes a string (not shown) in conjunction with displacement of each key 41, like an acoustic piano.
- the string-striking mechanism 91 includes a hammer 911 that can strike a string by rotation, and a transmission mechanism 912 (for example, a wippen, a jack, or a repetition lever) that rotates the hammer 911 in conjunction with the displacement of the key 41 . are provided for each key 41 .
- the substrate to be detected 43 is installed on a hammer 911 (for example, a hammer shank).
- the detection substrate 50 is installed on the support member 913 .
- the support member 913 is a structure that supports the string-striking mechanism 91, for example.
- the substrate to be detected 43 may be installed on a member other than the hammer 911 in the string-striking mechanism 91 .
- FIG. 14 is a schematic diagram illustrating the pedal mechanism 92 of the keyboard instrument 100.
- the pedal mechanism 92 includes a pedal 921 that is operated by the user's foot, a support member 922 that supports the pedal 921, and an elastic body 923 that biases the pedal 921 upward in the vertical direction.
- the substrate to be detected 43 is installed on the bottom surface of the pedal 921 .
- the detection substrate 50 is installed on the support member 922 so as to face the substrate 43 to be detected.
- the musical instrument using the pedal mechanism 92 is not limited to the keyboard musical instrument 100 .
- a similarly configured pedal mechanism 92 is utilized for any musical instrument such as, for example, a percussion instrument.
- FIG. 14 illustrates the pedal mechanism 92 of the keyboard instrument 100
- a pedal mechanism used in electric musical instruments such as electric stringed instruments (for example, electric guitar) also employs a configuration similar to that of FIG.
- a pedal mechanism used in electric musical instruments is an effect pedal that is operated by the user to adjust various sound effects, such as distortion or compressor.
- keyboard instrument 100 is exemplified in each of the above-described embodiments
- application target of the present disclosure is not limited to the above exemplification.
- configurations similar to those described above are used to detect the positions of operators operated by users when playing wind instruments such as woodwind instruments (e.g. clarinet or saxophone) and brass instruments (e.g. trumpet or trombone). be.
- the element on which the substrate to be detected 43 is installed is comprehensively expressed as a movable member that displaces according to the performance operation.
- Movable members include performance operators such as keys 41 or pedals 921 that are directly operated by the user, and structures such as weight members 42 or hammers 911 that are displaced in conjunction with operations on the performance operators.
- the movable member in the present disclosure is not limited to a member that displaces according to the performance action. In other words, the movable member is generically expressed as a member that can be displaced regardless of the trigger that causes the displacement.
- the configuration in which the coil 711 to be detected is installed on the weight member 42 is exemplified.
- Detector may be used.
- a plate-like member made of metal is exemplified as an object to be detected.
- the magnetic field formed around the detection coil 752 fluctuates according to the distance between the detection coil 752 and the object to be detected.
- a corresponding detection signal d is output from the resonance circuit 75 .
- a configuration in which the detected part is installed on the movable member is preferable, and the detected body such as the detected coil 711 and the metal plate described above is an example of the "detected part". .
- the configuration in which the keyboard instrument 100 includes a plurality of detection boards 50 (50L, 50M, and 50H) configured separately from each other has been exemplified.
- Embodiments with a substrate 50 are also envisioned.
- the detection board 50 corresponds to the "detection board”.
- any one of the set of the plurality of detection substrates 50 or the plurality of detection substrates 50 detects Equivalent to "substrate”.
- the keyboard instrument 100 includes the tone generator device 13, but in a configuration in which the keyboard instrument 100 includes a sound generating mechanism such as the string striking mechanism 91, the tone generator device 13 may be used. May be omitted.
- the present disclosure is also specified as a device (manipulation device) that controls musical tones by outputting manipulation signals corresponding to performance actions to the tone generator device 13 or the sound generating mechanism.
- a device manipulating device
- the tone generator device 13 or a musical instrument (keyboard instrument 100) having a sounding mechanism as exemplified in each of the above embodiments
- the tone generator device 13 or a device not having a 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.
- a detection system is provided on a movable member that is displaced by a user's playing motion, and is formed of a magnetic material or a conductor, and is opposed to the detected part. and a detection circuit for generating a detection signal corresponding to the distance between the detection coil and the detected portion; and a control substrate separate from the detection substrate, the movable member comprising: and a wiring section including wiring for transmitting the detection signal from the detection board to the control board.
- a control IC that generates displacement data is installed on a control board that is separate from the detection board on which the detection coil is installed. Therefore, it is easier to reduce the size of the detection board compared to the configuration in which the control IC is installed on the detection board. Moreover, since it is easier to secure the distance between the detection coil and the control IC compared to the configuration in which the control IC is installed on the detection substrate, the influence of the control IC on the magnetic field around the detection coil is reduced. Therefore, displacement data can be generated with high accuracy.
- the detection substrate includes one or more wiring substrates.
- the control board similarly includes one or more wiring boards.
- the control IC is composed of one or more integrated circuits (IC chips).
- mode 2 the control board does not overlap the detection board when viewed from above.
- the detected part includes a detected coil facing the detection coil.
- the magnetic field of the detection coil generates a current in the coil to be detected by electromagnetic induction. Therefore, it is possible to generate a detection signal that reflects the distance between the detection coil and the coil to be detected with high accuracy.
- a detection system includes a first detected portion corresponding to a first movable member that is displaced by a user's performance motion, and a second movable member that is displaced by the user's performance motion.
- a plurality of detected parts formed of a magnetic material or a conductor including a second detected part corresponding to a member, a first detection coil facing the first detected part, and the second detected part and a first detection signal corresponding to the distance between the first detection coil and the first detection coil, and the distance between the second detection coil and the second detection coil a detection circuit for generating a second detection signal; and a control board separate from the detection board, wherein the first displacement data representing the position of the first movable member is used for the first detection.
- a control board having a control IC for generating from the second detection signal second displacement data representing the position of the second movable member; and a control board for generating the first detection signal and the second detection signal from the detection board. and a wiring section including wiring for transmission from to the control board.
- the sensor further comprises a spacer installed on the detection substrate, a first end of the wiring portion is connected to the detection substrate, and a second end of the wiring portion is connected to the control substrate.
- the spacer is positioned between the detection substrate and a portion of the wiring portion other than the first end.
- the detection substrate includes a first detection substrate and a second detection substrate that are separate from each other, and the first detection coil is installed on the first detection substrate. , the second detection coil is installed on the second detection substrate, the detection circuit is installed on the first detection substrate to generate the first detection signal; and the second detection substrate. and a second detection circuit located in the second detection circuit for generating the second detection signal.
- the detection substrate includes the first detection substrate and the second detection substrate. Therefore, manufacturing or handling of the detection substrate is easier than in the case where the detection substrate is configured as a single substrate.
- the device further comprises a relay section for transmitting the first detection signal generated by the first detection circuit from the first detection board to the second detection board, wherein the wiring section , the first detection signal transmitted from the first detection board to the second detection board via the relay section and the second detection signal generated by the second detection circuit are transmitted to the control board; do.
- the detection signal generated by the first detection circuit and the detection signal generated by the second detection circuit are supplied to the control board through the wiring section between the second detection board and the control board. Therefore, it is not necessary to electrically connect the first detection board and the control board. Therefore, compared to a configuration in which each of the first detection board and the second detection board is individually connected to the control board, miniaturization of the control board is facilitated.
- a keyboard instrument includes: a plurality of keys including a first key and a second key; a first detected portion corresponding to the first key; A plurality of detected parts formed of a magnetic material or a conductor, including a corresponding second detected part, a first detection coil facing the first detected part, and a second detected part facing the second detected part a second detection coil, a first detection signal corresponding to the distance between the first detection part and the first detection coil, and a second detection signal corresponding to the distance between the second detection part and the second detection coil 2 a detection circuit for generating a detection signal; a detection board on which is installed; a control board installed with a control IC for generating second displacement data representing the position of the second key from the second detection signal; a wiring section including wiring for transmission from to the control board; and a reproduction control section for causing a reproduction device to reproduce sound corresponding to the first displacement data and the second displacement data.
- the first key is any one of two or more keys corresponding to a first sound range among the plurality of keys
- the second key is one of the plurality of keys. Any one of two or more keys corresponding to a second sound range different from the first sound range.
- the keyboard instrument according to the specific example of aspect 7 (aspect 10) further includes a support that supports the plurality of keys, the detection board, and the control board.
- the detection board and the control board are supported by the support supporting the plurality of keys. Therefore, the structure of the keyboard instrument is simplified as compared with a structure in which each of the detection board and the control board is supported by a structure separate from the support supporting the plurality of keys.
- the detection board is fixed to the support at a position below the first key that is closer to the front end than to the rear end of the first key
- the control board is: , is fixed to the support at a position closer to the rear end than to the front end of the second key.
- the detection board is installed below the plurality of keys
- the control board is installed on the rear end side of the plurality of keys. easy to secure. Therefore, the influence of the control IC on the magnetic field around the detection coil is reduced.
- the "rear end side" of the key means a position near the end (rear end) of the long key opposite to the end (front end) on the side of the player.
- a keyboard instrument according to a specific example of mode 10 or mode 11 (mode 12), further comprising a plurality of weight members respectively corresponding to the plurality of keys, wherein the plurality of weight members are installed below the plurality of keys. and each of the plurality of weight members moves according to the displacement of the key corresponding to the weight member, and the detection board is fixed to the support below the plurality of weight members.
- the detection board since the detection board is installed below the plurality of weight members, the detection board can be installed without hindering the displacement of each key or each weight member.
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Abstract
Description
図1は、第1実施形態に係る鍵盤楽器100の平面図である。鍵盤楽器100は、鍵盤装置11と筐体12と音源装置13と再生装置14とを具備する電子楽器である。筐体12は、鍵盤装置11と音源装置13と再生装置14とを支持および収容する中空の構造体である。
第2実施形態を以下に説明する。なお、以下に例示する各構成において機能が第1実施形態と同様である要素については、第1実施形態の説明で使用した符号を流用して各々の詳細な説明を適宜に省略する。
図12は、第3実施形態における鍵盤ユニットUの構成を例示する側面図である。第3実施形態における鍵盤ユニットUMの検出基板50Mにはスペーサ66が設置される。スペーサ66は、検出基板50Mと配線部30との間に介在することで両者間の間隔を確保する部材である。具体的には、スペーサ66は、配線部30のうち検出基板50Mに接続される第1端E1以外の部分と、当該検出基板50Mとの間に位置する。スペーサ66は、検出基板50(配線基板52)と比較して軟質な絶縁材料で形成され、検出基板50Mおよび配線部30の一方または双方により押圧されることで変形可能である。
以上に例示した各態様に付加される具体的な変形の態様を以下に例示する。以下の例示から任意に選択された2以上の態様を、相互に矛盾しない範囲で適宜に併合してもよい。
図13は、鍵盤楽器100の打弦機構91を例示する模式図である。打弦機構91は、アコースティックピアノと同様に、各鍵41の変位に連動して弦(図示略)を打撃するアクション機構である。具体的には、打弦機構91は、回動により打弦可能なハンマ911と、鍵41の変位に連動してハンマ911を回動させる伝達機構912(例えばウィペン,ジャックまたはレペティションレバー等)とを、鍵41毎に具備する。以上の構成において、被検出基板43はハンマ911(例えばハンマシャンク)に設置される。他方、検出基板50は支持部材913に設置される。支持部材913は、例えば打弦機構91を支持する構造体である。なお、打弦機構91におけるハンマ911以外の部材に被検出基板43を設置してもよい。
図14は、鍵盤楽器100のペダル機構92を例示する模式図である。ペダル機構92は、利用者が足で操作するペダル921と、ペダル921を支持する支持部材922と、鉛直方向の上方にペダル921を付勢する弾性体923とを具備する。以上の構成において、被検出基板43はペダル921の底面に設置される。他方、検出基板50は、被検出基板43に対向するように支持部材922に設置される。なお、ペダル機構92が利用される楽器は鍵盤楽器100に限定されない。例えば打楽器等の任意の楽器にも同様の構成のペダル機構92が利用される。
以上に例示した形態から、例えば以下の構成が把握される。
Claims (12)
- 利用者の演奏動作により変位する可動部材に設置され、磁性体または導電体で形成された被検出部と、
前記被検出部に対向する検出コイルと、前記検出コイルと前記被検出部との距離に応じた検出信号を生成する検出回路とを有する検出基板と、
前記検出基板とは別体の制御基板であって、前記可動部材の位置を表す変位データを前記検出信号から生成する制御ICを有する制御基板と、
前記検出信号を前記検出基板から前記制御基板に伝送する配線を含む配線部と
を具備する検出システム。 - 前記制御基板は、前記検出基板に対する平面視で当該検出基板に重ならない
請求項1の検出システム。 - 前記被検出部は、前記検出コイルに対向する被検出コイルを含む
請求項1または請求項2の検出システム。 - 利用者の演奏動作により変位する第1可動部材に対応する第1被検出部と、前記利用者の演奏動作により変位する第2可動部材に対応する第2被検出部とを含み、磁性体または導電体で形成された複数の被検出部と、
前記第1被検出部に対向する第1検出コイルと、前記第2被検出部に対向する第2検出コイルと、前記第1被検出部と前記第1検出コイルとの距離に応じた第1検出信号、および前記第2被検出部と前記第2検出コイルとの距離に応じた第2検出信号を生成する検出回路と、を有する検出基板と、
前記検出基板とは別体の制御基板であって、前記第1可動部材の位置を表す第1変位データを前記第1検出信号から生成し、前記第2可動部材の位置を表す第2変位データを前記第2検出信号から生成する制御ICを有する制御基板と、
前記第1検出信号および前記第2検出信号を前記検出基板から前記制御基板に伝送する配線を含む配線部と
を具備する検出システム。 - 前記検出基板に設置されたスペーサをさらに具備し、
前記配線部の第1端は前記検出基板に接続され、前記配線部の第2端は前記制御基板に接続され、
前記スペーサは、前記検出基板と、前記配線部のうち前記第1端以外の部分との間に位置する
請求項4の検出システム。 - 前記検出基板は、相互に別体である第1検出基板と第2検出基板とを含み、
前記第1検出コイルは、前記第1検出基板に設置され、
前記第2検出コイルは、前記第2検出基板に設置され、
前記検出回路は、前記第1検出基板に設置されて前記第1検出信号を生成する第1検出回路と、前記第2検出基板に設置されて前記第2検出信号を生成する第2検出回路とを含む
請求項4の検出システム。 - 前記第1検出回路が生成する前記第1検出信号を前記第1検出基板から前記第2検出基板に伝送する中継部をさらに具備し、
前記配線部は、前記第1検出基板から前記中継部を介して前記第2検出基板に伝送される前記第1検出信号と、前記第2検出回路が生成する前記第2検出信号とを、前記制御基板に伝送する
請求項6の検出システム。 - 第1鍵および第2鍵とを含む複数の鍵と、
前記第1鍵に対応する第1被検出部と、前記第2鍵に対応する第2被検出部とを含み、磁性体または導電体で形成された複数の被検出部と、
前記第1被検出部に対向する第1検出コイルと、前記第2被検出部に対向する第2検出コイルと、前記第1被検出部と前記第1検出コイルとの距離に応じた第1検出信号、および前記第2被検出部と前記第2検出コイルとの距離に応じた第2検出信号を生成する検出回路と、が設置された検出基板と、
前記検出基板とは別体の制御基板であって、前記第1鍵の位置を表す第1変位データを前記第1検出信号から生成し、前記第2鍵の位置を表す第2変位データを前記第2検出信号から生成する制御ICが設置された制御基板と、
前記第1検出信号および前記第2検出信号を前記検出基板から前記制御基板に伝送する配線を含む配線部と、
前記第1変位データおよび前記第2変位データに応じた音響を再生装置に再生させる再生制御部と
を具備する鍵盤楽器。 - 前記第1鍵は、前記複数の鍵のうち第1音域に対応する2以上の鍵の何れかであり、
前記第2鍵は、前記複数の鍵のうち前記第1音域とは相違する第2音域に対応する2以上の鍵の何れかである
請求項8の鍵盤楽器。 - 前記複数の鍵と前記検出基板と前記制御基板とを支持する支持体
をさらに具備する請求項8の鍵盤楽器。 - 前記検出基板は、前記第1鍵の下方において前記第1鍵の後端部よりも前端部に近い位置において前記支持体に固定され、
前記制御基板は、前記第2鍵の前端部よりも後端部に近い位置において前記支持体に固定される
請求項10の鍵盤楽器。 - 前記複数の鍵にそれぞれ対応する複数の錘部材をさらに具備し、
前記複数の錘部材は、前記複数の鍵の下方に設置され、
前記複数の錘部材の各々は、当該錘部材に対応する鍵の変位に応じて移動し、
前記検出基板は、前記複数の錘部材の下方において前記支持体に固定される
請求項10または請求項11の鍵盤楽器。
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EP22756061.2A EP4297015A4 (en) | 2021-02-22 | 2022-02-09 | DETECTION SYSTEM AND KEYBOARD INSTRUMENT |
CN202280013474.2A CN116888660A (zh) | 2021-02-22 | 2022-02-09 | 检测系统及键盘乐器 |
US18/359,471 US20230386442A1 (en) | 2021-02-22 | 2023-07-26 | Detection system and keyboard instrument |
US19/072,241 US20250201221A1 (en) | 2021-02-22 | 2025-03-06 | Detection system and keyboard device |
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JP2018180074A (ja) | 2017-04-04 | 2018-11-15 | ヤマハ株式会社 | 基板、複合基板及び鍵盤装置 |
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US12205569B2 (en) * | 2019-11-20 | 2025-01-21 | Yamaha Corporation | Instrument playing apparatus |
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US20250201221A1 (en) | 2025-06-19 |
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