Keyboard device and performance operation device

Abstract

To simplify a manufacturing process of an operation device using a magnetic induction sensor.SOLUTION: A keyboard device includes: a distance sensor which has first and second substrates respectively including conductors and which measures the distance between the first substrate and the second substrate; keys operable by an operator; and a holding part holding the first substrate between the keys and the second substrate and having an elastically deformable part whose deformation displaces the first substrate.SELECTED DRAWING: Figure 27

Description

[Technical field]

[0001] The present invention relates to a musical performance operation device. [Background technology]

[0002] In electronic keyboard instruments, key depression is detected and a sound signal is generated based on the detection result. The detection of key depression is realized by a contact sensor or a non-contact sensor. Some of these non-contact sensors can be used as distance sensors, so that the amount of key depression can be measured continuously. This allows the movement of the key to be reflected in the sound with high accuracy, and can also be used to detect aftertouch.

[0003] Non-contact sensors include, for example, optical sensors. Compared to magnetic induction sensors, optical sensors are more susceptible to the effects of light entering from the outside and to dirt. For example, grease is used in the moving parts of electronic keyboard instruments. If this grease scatters, the optical sensor may become dirty. Such sensors may also be used in acoustic pianos equipped with a sound source. In the case of an acoustic piano, part of the casing (for example, the roof panel) may be open when playing, and the sensor may be affected by external light.

[0004] As a non-contact sensor that is not affected in this way, for example, there is a magnetic induction type sensor (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] U.S. Pat. No. 4,580,478 Summary of the Invention [Problem to be solved by the invention]

[0006] Since magnetic induction sensors are non-contact, one side of the board on which the coil is located must be attached to a part that moves when a key is pressed, so it is attached to each key. Because keyboard instruments use many keys, there is a need to make the process of attaching the board to each key more efficient during the manufacturing process of keyboard instruments.

[0007] An object of the present invention is to simplify the manufacturing process of a performance operation device that uses a magnetic induction sensor. [Means for solving the problem]

[0008] According to one embodiment of the present invention, a musical performance operation device is provided that includes a distance sensor, an operator, and a holding unit. The distance sensor includes a first substrate and a second substrate, each of which has a conductor arranged thereon, and measures the distance between the first substrate and the second substrate. The operator is operable by an operator. The holding unit holds the first substrate between the operator and the second substrate, and moves together with the operator.

[0009] According to one embodiment of the present invention, there is provided a musical performance operation device comprising a distance sensor, a manipulator, and a holding section. The distance sensor includes a first board and a second board, each of which has a conductor arranged thereon, and measures the distance between the first board and the second board. The manipulator is operable by an operator. The first member is linked to the manipulator. The holding section holds the first board between the first member and the second board, and moves integrally with the first member. .

[0010] The operating element and the holding portion may be made of the same material.

[0011] The first member and the holding portion may be made of the same material.

[0012] The first member may include an elastically deformable portion, and the distance between the first substrate and the second substrate may change as the first member elastically deforms upon receiving a force from the operator. In this case, the first member may receive the force from the operator directly or indirectly via another member.

[0013] The holding portion may detachably hold the first substrate.

[0014] The holding portion may include an elastic body, and the holding portion may hold the first substrate when the elastic body is in a first state, and the holding of the first substrate by the holding portion may be released when the elastic body is in a second state in which it is elastically deformed more than in the first state.

[0015] The holding portion may include a first plate portion and a second plate portion, the positional relationship between the first plate portion and the second plate portion may be changeable, and the holding portion may hold the first substrate when the first plate portion and the second plate portion are in a first state in which the first substrate is sandwiched between the first plate portion and the second plate portion, and the holding of the first substrate by the holding portion may be released when the first plate portion and the second plate portion are in a second state in which the first plate portion and the second plate portion are further apart than in the first state. Effect of the Invention

[0016] According to one embodiment of the present invention, the manufacturing process of a performance operation device using a magnetic induction sensor can be simplified. [Brief description of the drawings]

[0017] [Figure 1] 1 is a diagram illustrating a keyboard device according to a first embodiment of the present invention. FIG. [Diagram 2] FIG. 1 is a diagram illustrating the internal structure of a keyboard device according to a first embodiment of the present invention (when a key is released). [Diagram 3] FIG. 1 is a diagram illustrating the internal structure of a keyboard device according to a first embodiment of the present invention (when a white key is pressed). [Figure 4] FIG. 1 is a diagram illustrating an active circuit board according to a first embodiment of the present invention. [Diagram 5] FIG. 2 is a diagram illustrating a passive circuit board according to the first embodiment of the present invention. [Figure 6] FIG. 2 is a diagram illustrating the board holder from which the passive circuit board has been removed in the first embodiment of the present invention. [Figure 7] FIG. 2 is a diagram illustrating a board holder to which a passive circuit board is attached in the first embodiment of the present invention. [Figure 8] FIG. 2 is a bottom view of the substrate holder from which a fixing member has been removed in the first embodiment of the present invention. [Figure 9] FIG. 2 is a diagram illustrating a cross section (cutting line Ac1-Ac2) of the substrate holder in the first embodiment of the present invention. [Figure 10] FIG. 2 is a diagram illustrating a cross section (cutting line Bc1-Bc2) of the substrate holder in the first embodiment of the present invention. [Figure 11] FIG. 2 is a diagram illustrating a cross section (cutting line Bc1-Bc2) of a substrate holder to which a fixing member is attached in the first embodiment of the present invention. [Figure 12] 13 is a diagram illustrating a board holder from which a passive circuit board has been removed in a second embodiment of the present invention. FIG. [Figure 13] 13 is a diagram illustrating a board holder to which a passive circuit board is attached in a second embodiment of the present invention. FIG. [Figure 14] 13 is a diagram illustrating a board holder from which a passive circuit board has been removed in a third embodiment of the present invention. FIG. [Figure 15] 13A and 13B are diagrams illustrating a state in which a passive circuit board is arranged on a board holder in a third embodiment of the present invention. [Figure 16] 13 is a diagram illustrating a cross section (cutting line Cc1-Cc2) in a state in which a passive circuit board is placed on a board holder in a third embodiment of the present invention. FIG. [Figure 17] 17 is a diagram illustrating a cross section in a state in which the passive circuit board is attached to the board holder by closing the lid portion in FIG. 16. FIG. [Figure 18] 13 is a diagram illustrating a board holder from which a passive circuit board has been removed in a fourth embodiment of the present invention. FIG. [Figure 19] 13 is a diagram illustrating a cross section (cutting line Dc1-Dc2) of a substrate holder in a fourth embodiment of the present invention. FIG. [Figure 20] 13A to 13C are diagrams illustrating a passive circuit board according to a fourth embodiment of the present invention. [Figure 21] 13 is a diagram illustrating a board holder to which a passive circuit board is attached in a fourth embodiment of the present invention. FIG. [Figure 22] 13A to 13C are diagrams illustrating a passive circuit board according to a fifth embodiment of the present invention. [Figure 23] 19 is a view for explaining a cross section of a substrate holder in a fifth embodiment of the present invention. FIG. [Figure 24] FIG. 13 is a diagram illustrating the internal structure of a keyboard device according to a sixth embodiment of the present invention (when a key is released). [Diagram 25] FIG. 13 is a diagram illustrating the internal structure of a keyboard device according to a sixth embodiment of the present invention (when a white key is pressed). [Figure 26] 13 is a diagram illustrating a board holder to which a passive circuit board is attached in a sixth embodiment of the present invention. FIG. [Figure 27] FIG. 13 is a diagram illustrating the internal structure of a keyboard device according to a seventh embodiment of the present invention (when a key is released). [Figure 28] FIG. 13 is a diagram illustrating the internal structure of a keyboard device according to a seventh embodiment of the present invention (when a white key is pressed). [Figure 29] 13 is a diagram illustrating a board holder to which a passive circuit board is attached in a seventh embodiment of the present invention. FIG. [Diagram 30] FIG. 13 is a diagram for explaining the inside of a board holder to which a passive circuit board is attached in a seventh embodiment of the present invention (a diagram of the board holder as viewed from below). [Diagram 31] FIG. 13 is a view for explaining a cross section (cutting line Ec1-Ec2) of a substrate holder in a seventh embodiment of the present invention. [Diagram 32] FIG. 13 is a diagram for explaining the inside of a board holder to which a passive circuit board is attached in an eighth embodiment of the present invention (a diagram of the board holder as viewed from below). [Diagram 33]FIG. 13 is a view illustrating a cross section (cutting line Fc1-Fc2) of a substrate holder in an eighth embodiment of the present invention. [Diagram 34] 13 is a diagram illustrating a board holder to which a passive circuit board is attached in a ninth embodiment of the present invention. FIG. [Diagram 35] FIG. 23 is a diagram illustrating the internal structure of a keyboard device according to a tenth embodiment of the present invention (when a key is released). [Diagram 36] 23A and 23B are diagrams illustrating the mounting position of a substrate holder in a tenth embodiment of the present invention. [Figure 37] 23A to 23C are views for explaining another example of the mounting position of the substrate holder in the tenth embodiment of the present invention. [Figure 38] FIG. 23 is a diagram illustrating the internal structure of a keyboard device according to an eleventh embodiment of the present invention (when a key is released). [Figure 39] FIG. 23 is a diagram for explaining the mounting position of a substrate holder in an eleventh embodiment of the present invention. [Diagram 40] FIG. 23 is a view for explaining an example in which the substrate holder is attached in a different form in the eleventh embodiment of the present invention. [Diagram 41] FIG. 23 is a diagram illustrating a board holder to which a passive circuit board is attached in a twelfth embodiment of the present invention. [Diagram 42] FIG. 23 is a view illustrating a cross section (cutting line Gc1-Gc2) of a substrate holder in a twelfth embodiment of the present invention. [Diagram 43] FIG. 23 is a diagram illustrating a board holder to which a passive circuit board is attached in a thirteenth embodiment of the present invention. [Diagram 44] FIG. 23 is a view for explaining a cross section (cutting line Hc1-Hc2) of a substrate holder in a thirteenth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A keyboard device according to one embodiment of the present invention will be described in detail below with reference to the drawings. The embodiment described below is one example of the present invention, and the present invention is not to be interpreted as being limited to these embodiments. In the drawings referred to in this embodiment, the same parts or parts having similar functions are given the same or similar symbols (symbols consisting of only A, B, etc. added after a number), and repeated explanations may be omitted. Also, for convenience of explanation, the dimensional ratios in the drawings may differ from the actual ratios, and some components may be omitted from the drawings.

[0019] First Embodiment In the first embodiment, a keyboard device used as an electronic keyboard instrument will be described. With this keyboard device, a magnetic induction sensor can detect key depression. The key depression is detected as, for example, the position or posture of the key that moves when the key is depressed. The keyboard device will be described in detail below.

[0020] [1. Overview of the keyboard device] FIG. 1 is a diagram illustrating a keyboard device according to a first embodiment of the present invention. The keyboard device 1 is an electronic keyboard instrument, and in this example, an electronic piano. The keyboard device 1 includes keys 10, a housing 50, a speaker 60, a sound source unit 80, and an operation unit 90. In the following explanation, for the sake of convenience, the side of the keyboard device 1 where the performer is present (the side where the keys 10 are present relative to the housing 50) is defined as the front side, and the side opposite the performer is defined as the rear side. Furthermore, left and right, and up and down are also defined as directions as seen from the performer's perspective.

[0021] The keys 10 are arranged in one direction. Here, the scale direction in which the keys 10 are arranged is called the left-right direction D1. In the following description, when distinguishing between left and right, the left direction is called D1a and the right direction is called D1b. A direction perpendicular to the left-right direction D1 is called the front-rear direction D2. When the keyboard device 1 is viewed from above, the longitudinal direction of the keys 10 is the same as the front-rear direction D2. In the following description, when distinguishing between front and rear, the front direction is called D2a and the rear direction is called D2b. A direction perpendicular to both the left-right direction D1 and the front-rear direction D2 is called the up-down direction D3 (see FIG. 2). The up-down direction D3 corresponds to the approximately vertical direction when the keyboard device 1 is placed flat. In other words, when the keyboard device 1 is placed flat horizontally, the left-right direction D1 and the front-rear direction D2 are directions within a horizontal plane. In the following description, when distinguishing between up and down, the up direction is called D3a and the down direction is called D3b.

[0022] The key 10 can rotate relative to the housing 50. The rotation range of the key 10 includes a state in which the longitudinal direction of the key 10 coincides with the front-rear direction D2. A speaker 60, a key depression amount measurement unit 70, a sound source unit 80, and an operation unit 90 are arranged in the housing 50. When a player (operator) operates the key 10, a sound is generated from the speaker 60 by the sound generation function of the keyboard device 1. The operation unit 90 is a device such as an operation button, a touch sensor, and a slider, and receives instructions for changing the type (tone) and volume of the sound to be generated, and outputs a signal according to the input operation to the sound source unit 80. The keyboard device 1 may include an interface for inputting and outputting signals to and from an external device. The interface may be, for example, a terminal for outputting sound signals to an external device, or a cable connection terminal for transmitting and receiving MIDI data.

[0023] The key press amount measuring unit 70 includes a magnetic induction type sensor arranged for each of the multiple keys 10. The sensor corresponding to each key 10 detects the position (pressing amount) of the key 10 in the rotation range. The key press amount measuring unit 70 outputs key information that identifies one of the multiple keys 10 and pressing amount information that corresponds to the pressing amount of the identified key 10 to the sound source unit 80. The pressing amount information may indicate the pressing amount of the key 10 itself, or may be a value calculated from the pressing amount, such as a speed calculated from the change in the pressing amount, or may be a combination of these. The combination of the key press amount measuring unit 70 and the keys 10 is an example of an input device. The detailed configuration of the key press amount measuring unit 70 will be described later.

[0024] The sound source unit 80 is a signal processing circuit that generates sound signals in response to playing operations on the keys 10. Specifically, the sound source unit 80 generates sound signals based on the information output from the key depression amount measurement unit 70, and outputs the generated sound signals to the speaker 60. The speaker 60 amplifies and outputs the sound signals output from the sound source unit 80, thereby generating sounds corresponding to the sound signals.

[0025] [2. Internal structure of keyboard device 1] Next, the internal structure of the keyboard device 1 will be described with reference to Figures 2 and 3, which show schematic cross sections of the keyboard device 1 cut along a plane having a normal in the left-right direction D1 (a plane including the front-rear direction D2 and the up-down direction D3).

[0026] Fig. 2 is a diagram illustrating the internal structure of the keyboard device according to the first embodiment of the present invention (when a key is released). Fig. 3 is a diagram illustrating the internal structure of the keyboard device according to the first embodiment of the present invention (when a white key is pressed). Of the keys 10, the configuration corresponding to the white key 10w is shown, and the configuration corresponding to the black key 10b is the same as the configuration corresponding to the white key 10w, so only the position of the black key 10b is shown and other configurations are omitted.

[0027] The frame 20 is fixed to the housing 50 and supports a plurality of keys 10 arranged in the left-right direction D1. In this example, the frame 20 is made of a resin material. The frame 20 includes a key guide portion 201, a key support portion 203, a rib portion 205, and a board holding portion 207.

[0028] The key guide portion 201 restricts the movement of the key 10 in the left-right direction D1 by a member that slides with the key 10 under the front end of the key 10. The key support portion 203 supports the elastic portion 105 arranged at the rear end portion of the key 10. When the elastic portion 105 deforms in the up-down direction, the free end side of the key 10 rotates around the key support portion 203. At this time, the key 10 rotates around the axis of the left-right direction D1 because the movement of the key 10 in the left-right direction D1 is restricted by the key guide portion 201. The rib portion 205 is a plate-shaped member having a surface (a surface having the left-right direction D1 as a normal line) including the front-rear direction D2 and the up-down direction D3. A plurality of rib portions 205 are arranged side by side in the left-right direction D1. Each of the plurality of rib portions 205 is connected to the key guide portion 201, the key support portion 203, and the board holding portion 207, respectively.

[0029] The board holding part 207 is a plate-like member that holds the active circuit board 700. In this example, the active circuit board 700 is disposed on the upper surface side (key 10 side) of the board holding part 207. A board holder 170 is fixed to the lower surface side (board holding part 207 side) of the key 10. The board holder 170 (holding part) holds the passive circuit board 750 as described below.

[0030] As described below, the active circuit board 700 and the passive circuit board 750 are elements that make up a magnetic induction sensor, and are components included in the key depression amount measurement unit 70. The passive circuit board 750 is provided corresponding to each key 10. In this example, the active circuit board 700 is provided corresponding to a plurality of keys 10, but it may be provided corresponding to each key 10.

[0031] The load unit 30 (first member) is disposed corresponding to each key 10. The load unit 30 and the key 10 are interlocked by being connected to each other through the key connection unit 301 (sliding unit 307) of the load unit 30. The load unit 30 includes the key connection unit 301, a bearing 303, and a weight unit 305. The bearing 303 is provided corresponding to the shaft unit provided on the frame 20. The key connection unit 301 is disposed on the opposite side of the bearing 303 from the weight unit 305. The sliding unit 307 provided at one end of the key connection unit 301 slides against the load connection unit 103 provided below the key 10. The load unit 30 has a center of gravity that is located on the weight unit 305 side of the bearing 303. Therefore, when the key 10 is not pressed, the weight unit 305 is placed on the lower stopper 351 of the load unit 30, and the load unit 30 holds the key 10 in a rest position (corresponding to when the key is released). The lower stopper 351 and the upper stopper 353 are supported by the frame 20 .

[0032] When the key 10 is pressed in the state shown in FIG. 2, as shown in FIG. 3, the load section 30 rotates around the bearing 303 in conjunction with the rotation of the key 10, causing the weight section 305 to move upward and collide with the upper stopper 353, restricting further movement. At this time, the active circuit board 700 and the passive circuit board 750 approach each other, as shown in FIG. 3. The key press amount information output by the key press amount measurement section 70 described above is information corresponding to the distance between the active circuit board 700 and the passive circuit board 750 (i.e., the relative positional relationship between the active circuit board 700 and the passive circuit board 750). Note that the keyboard device 1 does not necessarily need to be provided with the load section 30. In this case, it is sufficient to provide a configuration that restricts the depression range of the key 10.

[0033] [3. Structure of key depression amount measurement unit 70] As described above, the key press amount measuring section 70 includes the active circuit board 700 and the passive circuit board 750. The active circuit board 700 includes a coil (hereinafter referred to as an active coil) for forming a magnetic field by the supplied power. When the passive circuit board 750 including the coil (hereinafter referred to as a passive coil) moves in this magnetic field, the active circuit 770 (see FIG. 4) anti-resonates according to the position of the passive coil due to magnetic coupling, that is, the circuit characteristics of the active circuit 770 change, and the output of the signal obtained from the active circuit board 700 changes. Therefore, according to the signal obtained from the active circuit board 700, the distance between the active circuit board 700 and the passive circuit board 750 can be measured. Thus, the key press amount measuring section 70 includes a distance sensor. Hereinafter, each component of the key press amount measuring section 70 will be described in detail.

[0034] [3-1. Structure of the active circuit board 700] 4 is a diagram illustrating an active circuit board in the first embodiment of the present invention. The active circuit board 700 is a printed circuit board including a plurality of active circuits 770, a multiplexer 709, and various wiring (a clock signal line, a selection signal line, an input signal line, an output signal line, etc., in addition to a ground wiring 708). The active circuit board 700 also includes a signal processing circuit (not shown). Each of the plurality of active circuits 770 is provided corresponding to each key 10. The two wirings connecting the active circuit 770 and the multiplexer 709 correspond to a signal input unit 703a and a signal output unit 703b.

[0035] The active circuit 770 includes an active coil 701 (conductor), capacitors 706a and 706b, and resistors 707a and 707b. The active coil 701 is formed on a substrate. The wiring 701a is formed on the upper surface side (key 10 side) of the substrate, and wiring 701b is provided on the lower surface side (substrate holding part 207 side) of the substrate. In Fig. 4, the configuration arranged on the lower surface side of the substrate is shown by dashed lines. The wiring 701a and wiring 701b connected to each other form an active coil 701 in which two coils (a first coil 701x and a second coil 701y) are connected in series.

[0036] The first coil 701x and the second coil 701y are arranged side by side along the front-rear direction D2, and are wound in opposite directions. The opposite winding directions do not mean that the wires are wound in opposite directions in terms of structure, but that the coils are wound so that currents flow in opposite directions when current is applied to the circuits. This is the same in the other embodiments and modified examples described below. Therefore, the magnetic flux formed by the active coil 701 is formed so that it passes through the second coil 701y immediately after leaving the first coil 701x.

[0037] Capacitors 706a and 706b are connected in series between both ends of the active coil 701. A ground wiring 708 is connected between the capacitors 706a and 706b. The ground wiring 708 is provided in common for each active circuit 770. A resistor 707a is connected between the capacitor 706a and the signal input section 703a, and a resistor 707b is connected between the capacitor 706b and the signal output section 703b.

[0038] When an AC signal is input to the signal input unit 703a via the multiplexer 709, the active coil 701 forms a magnetic field corresponding to the input signal, and the active coil 701 and the passive coil 751 are magnetically coupled to modulate the signal output from the signal output unit 703b. The modulated signal is output to a signal processing circuit (not shown) via the multiplexer 709 and converted into depression amount information. The signal processing circuit outputs key information and depression amount information of the key 10 corresponding to the signal acquired by the multiplexer 709.

[0039] [3-2. Structure of the passive circuit board 750] FIG. 5 is a diagram for explaining a passive circuit board in the first embodiment of the present invention. A surface 750a of the passive circuit board 750 shown in FIG. 5 is a surface facing the downward direction D3b in FIG. 2, and a surface 750b is a surface facing the upward direction D3a. The passive circuit board 750 is a printed circuit board including a passive coil 751 (conductor) and a capacitor 756. The passive coil 751 is formed on a board, and includes two coils 751x and 751y that are wound in opposite directions to each other, similar to the active coil 701. The coils 751x and 751y are connected via holes 751xt1, 751xt2, 751yt1, and 751yt2 that penetrate the surfaces 750a and 750b. The opposite winding directions here do not mean that the wiring is wound in opposite directions in terms of structure, but that the currents are wound in opposite directions when an induced current occurs in the circuit. This also applies to the other embodiments and modified examples described below. A capacitor 756 is connected in series between both ends of the passive coil 751 (between coil 751x and coil 751y). In this example, the surface of the passive circuit board 750 (the surface on which the passive coil 751 is formed) is generally parallel to the upper surface (operation surface) of the key 10. The capacitor 756 is disposed on surface 750a. Unless otherwise specified, the passive circuit boards in the embodiments described below have the same configuration as the passive circuit board 750 described above.

[0040] [4. Structure of the substrate holder 170] Next, the structure of the board holder 170 that is fixed to the key 10 and holds the passive circuit board 750 will be described with reference to FIGS.

[0041] FIG. 6 is a diagram for explaining the board holder from which the passive circuit board in the first embodiment of the present invention has been removed. FIG. 7 is a diagram for explaining the board holder to which the passive circuit board in the first embodiment of the present invention has been attached. FIG. 8 is a diagram for explaining the board holder from which the fixing member in the first embodiment of the present invention has been removed, viewed from below. FIG. 9 is a diagram for explaining a cross section (cutting line Ac1-Ac2) of the board holder in the first embodiment of the present invention. FIG. 10 is a diagram for explaining a cross section (cutting line Bc1-Bc2) of the board holder in the first embodiment of the present invention. FIG. 11 is a diagram for explaining a cross section (cutting line Bc1-Bc2) of the board holder to which the fixing member in the first embodiment of the present invention has been attached. The key 10 is disposed on the upward direction D3a of the board holder 170 shown in each figure. In other words, the board holder 170 is connected to the downward direction D3b surface of the key 10.

[0042] The key 10 and the substrate holder 170 are fixed by a fixing member 190. The fixing member 190 is made of metal. The fixing member 190 is not limited to metal, and may be made of other materials such as resin. This also applies to the other embodiments and modified examples described below.

[0043] In this example, the substrate holder 170 is made of resin and manufactured by injection molding. The substrate holder 170 has a generally rectangular parallelepiped shape with a portion open. The portion is open due to limitations in the injection molding process and also to achieve the functions of the configuration described below. The method of manufacturing the substrate holder 170 is not limited to injection molding, and may be other methods such as cutting. This also applies to the other embodiments and modified examples described below.

[0044] A plate-shaped bottom surface portion 179 is disposed on the upper side D3a (key 10 side) of the substrate holder 170. A groove portion 1795c is disposed in the center of the bottom surface portion 179. The groove portion 1795c is a portion of the bottom surface portion 179 that is thinner along the front-rear direction D2. Through holes 1795a, 1795b penetrating the bottom surface portion 179 are disposed on both ends of the groove portion 1795c in the front-rear direction D2. As shown in FIG. 6 and FIG. 11, the fixing member 190 includes a plate-shaped member 190c having a longitudinal side, and key embedding portions 190a, 190b bent in the same direction and substantially perpendicularly at both longitudinal ends of the plate-shaped member 190c. The plate-shaped member 190c is disposed along the groove portion 1795c, and the key embedding portions 190a, 190b pass through the through holes 1795a, 1795b, respectively, and are embedded in and fixed to the key 10. The thinned portion of the bottom surface portion 179 in the groove portion 1795c is sandwiched between the plate-shaped member 190c and the key 10, thereby fixing the key 10 and the substrate holder 170. By fixing the positional relationship between the key 10 and the substrate holder 170, the substrate holder 170 moves integrally with the key 10.

[0045] A protruding portion 177a is disposed to the left of the bottom surface portion 179 in the D1a direction via an elastic portion 1775a. The elastic portion 1775a functions as an elastic body by being supported by the bottom surface portion 179 in a cantilever manner. The protruding portion 177a protrudes in a downward direction D3b relative to the bottom surface portion 179. The protruding portion 177a can move in the up-down direction D3 by the elastic portion 1775a being elastically deformed. A protruding portion 177b is disposed to the right of the bottom surface portion 179 in the D1b direction via an elastic portion 1775b. The elastic portion 1775b functions as an elastic body by being supported by the bottom surface portion 179 in a cantilever manner. The protruding portion 177b protrudes in a downward direction D3b relative to the bottom surface portion 179. The protruding portion 177b can move in the up-down direction D3 by the elastic portion 1775b being elastically deformed. In this example, the raised portion 177a and the raised portion 177b are disposed so as to sandwich the groove portion 1795c.

[0046] A side surface portion 171a extending in the downward direction D3b is disposed at an end portion in the left direction D1a of the bottom surface portion 179. A side surface portion 171b extending in the downward direction D3b is disposed at an end portion in the right direction D1b of the bottom surface portion 179. A side surface portion 171b extending in the downward direction D3b is disposed at an end portion in the rear direction D2b of the bottom surface portion 179. The side surface portion 178 extends in the direction D3b. The side surface portions 171a, 171b, and 178 are plate-shaped members that include a portion that is approximately perpendicular to the bottom surface portion 179.

[0047] Lid portions 172a and 173a extending toward the right direction D1b are disposed at the end of the side surface portion 171a in the downward direction D3b and both ends in the front-rear direction. The lid portions 172a and 173a are plate-shaped members substantially parallel to the bottom surface portion 179. The lid portion 172a has a linear protrusion 1725a disposed on a surface on the upward direction D3a side (surface on the inner side of the substrate holder 170). The linear protrusion 1725a is disposed along the front-rear direction D2. The lid portion 173a has a linear protrusion 1735a disposed on a surface on the upward direction D3a side (surface on the inner side of the substrate holder 170). The linear protrusion 1735a is disposed along the front-rear direction D2.

[0048] Lid portions 172b, 173b extending toward the left direction D1a are disposed at the end of the side portion 171b in the downward direction D3b and both ends in the front-rear direction. The lid portions 172b, 173b are plate-shaped members substantially parallel to the bottom surface portion 179. The lid portion 172b has a linear protrusion 1725b disposed on a surface on the upward direction D3a side (surface on the inner side of the substrate holder 170). The linear protrusion 1725b is disposed along the front-rear direction D2. The lid portion 173b has a linear protrusion 1735b disposed on a surface on the upward direction D3a side (surface on the inner side of the substrate holder 170). The linear protrusion 1735b is disposed along the front-rear direction D2.

[0049] A protuberance 175 is disposed at an end of the bottom surface portion 179 in the forward direction D2a via an elastic portion 1755. The elastic portion 1755 functions as an elastic body by being supported by the bottom surface portion 179 in a cantilever manner. The protuberance 175 protubers in the downward direction D3b relative to the bottom surface portion 179, and the length of the protuberance in the forward and backward direction D2 becomes shorter as it approaches the downward direction D3b. The protuberance 175 includes a portion that is approximately perpendicular to the bottom surface portion 179 on the surface on the rear direction D2b side (the surface on the inner side of the substrate holder 170). When a force F is applied to the protuberance 175 in the upward direction D3a, the elastic portion 1755 is elastically deformed, and the protuberance 175 moves in the upward direction D3a. An opening 170a is formed in the forward direction D2a of the substrate holder 170. As the raised portion 175 moves in the upward direction D3a, an opening 170a large enough to insert the passive circuit board 750 into the board holder 170 is secured.

[0050] When the passive circuit board 750 is inserted into the board holder 170 through the opening 170a, the passive circuit board 750 moves the raised portions 177a and 177b in the upward direction D3a, and finally, the passive circuit board 750 comes into contact with the side portion 178. When this state is reached, the raised portion 175 returns to its original position. In this process, the capacitor 756 disposed on the passive circuit board 750 passes between the lid portion 172a and the lid portion 172b. Therefore, even if the capacitor 756 protrudes from the surface 750a, it does not hinder the insertion of the passive circuit board 750. Note that the raised portion 175 does not have to return completely to its original position because it is in contact with the end face or edge of the passive circuit board 750. That is, the elastic portion 1755 may continue to be subjected to force F in the upward direction D3a by the passive circuit board 750, but the position of the protrusion 175 returns to at least an extent that the passive circuit board 750 cannot pass through the opening 170a.

[0051] When the passive circuit board 750 is housed in the board holder 170, its position in the left-right direction D1 is determined by its side surface portions 171a and 171b, and its position in the front-rear direction D2 is determined by its side surface portion 178 and the raised portion 175. The raised portions 177a and 177b that have been moved to the passive circuit board 750 attempt to return to their original positions due to the restoring forces of the elastic portions 1775a and 1775b, respectively. As a result, the raised portions 177a and 177b apply a force in the downward direction D3b to the passive circuit board 750, and the passive circuit board 750 is pressed against the linear protrusions 1725a, 1725b, 1735a, and 1735b. As a result, the position of the passive circuit board 750 in the up-down direction D3 is determined. In this manner, The flexible circuit board 750 is held in a board holder 170 .

[0052] Even if there is a certain tolerance for the position of the passive circuit board 750 in the left-right direction D1 and the front-back direction D2, the passive circuit board 750 is sandwiched in the up-down direction D3 by the board holder 170. Therefore, the passive circuit board 750 hardly moves while being held inside the board holder 170.

[0053] On the other hand, in a state where the passive circuit board 750 is held by the board holder 170, a force F is applied to elastically deform the elastic portion 1755, and the protruding portion 175 is moved in the upward direction D3a, thereby widening the opening 170a. This releases the passive circuit board 750 from being held by the board holder 170. In this manner, the passive circuit board 750 is released from being held in a state (second state) where the elastic portion 1755 is further elastically deformed than in a state (first state) where the elastic portion 1755 is held by the board holder 170. In this state, the passive circuit board 750 can be removed from the board holder 170 by sliding the passive circuit board 750 toward the opening 170a.

[0054] As described above, according to the keyboard device 1 of the first embodiment of the present invention, the key depression amount measuring unit 70 can measure the depression amount of the key 10 using a magnetic induction sensor. A passive circuit board 750 needs to be provided for each key 10. In this example, the board holder 170 fixed to the key 10 can hold or release the passive circuit board 750 by elastically deforming the elastic portion 1755, that is, the passive circuit board 750 is detachably held. Therefore, the passive circuit board 750 can be easily attached and detached to the board holder 170, which results in the manufacturing process of the keyboard device 1 being simplified and the maintainability being improved.

[0055] <Second embodiment> In the first embodiment, the key 10 and the substrate holder 170 are separate structures, and their positional relationship is fixed relative to each other via a fixing member 190. In the second embodiment, the substrate holder 170A formed integrally with the key 10 will be described with reference to Figures 12 and 13. In this example, the key 10 and the substrate holder 170A are formed integrally by injection molding, and are made of the same material.

[0056] FIG. 12 is a diagram illustrating a board holder from which a passive circuit board in the second embodiment of the present invention has been removed. FIG. 13 is a diagram illustrating a board holder to which a passive circuit board in the second embodiment of the present invention has been attached. The board holder 170A is configured to be continuous with the key 10 and includes a configuration similar to that of the board holder 170. The side portions 171Aa, 171Ab, and 178A and the cover portions 172Aa and 172Ab are similar to the corresponding configurations in the board holder 170, and therefore their description will be omitted. In the board holder 170A, the configuration of the opening 170Aa is different from that of the opening 170a in the board holder 170.

[0057] A protruding portion 175Aa is disposed at an end of the side surface portion 171Aa in the forward direction D2a and at an end of the side surface portion 171Aa in the upward direction D3a via an elastic portion 1755Aa extending in the rightward direction D1b. The elastic portion 1755Aa functions as an elastic body by being supported by the side surface portion 171Aa in a cantilever manner. The protruding portion 175Aa protrudes in the upward direction D3a relative to the elastic portion 1755Aa. The protruding portion 175Aa includes a portion that is approximately perpendicular to the bottom surface portion 179A on the surface on the rearward direction D2b side (the surface on the inner side of the substrate holder 170A). When a force F is applied to the protruding portion 175Aa in the downward direction D3b, the elastic portion 1755Aa elastically deforms, and the protruding portion 175Aa moves in the downward direction D3b.

[0058] A protruding portion 175Ab is disposed on an end portion of the side surface portion 171Ab in the forward direction D2a and on an end portion in the upward direction D3a via an elastic portion 1755Ab extending in the leftward direction D1a. The protruding portion 175Ab functions as an elastic body by being supported by the side surface portion 171Ab in a cantilever manner. The protruding portion 175Ab protrudes in the upward direction D3a with respect to the elastic portion 1755Ab. The protruding portion 175Ab includes a portion that is approximately perpendicular to the bottom surface portion 179A on the surface on the rear direction D2b side (the surface on the inner side of the substrate holder 170A). When a force F is applied to the protruding portion 175Ab in the downward direction D3b, the elastic portion 1755Ab undergoes elastic deformation, and the protruding portion 175Ab moves in the downward direction D3b.

[0059] An opening 170Aa is formed in the front direction D2a of the substrate holder 170A. The raised portions 175Aa and 175Ab move in the downward direction D3b, thereby securing an opening 170Aa large enough to insert the passive circuit board 750 into the substrate holder 170A. When the passive circuit board 750 is inserted into the substrate holder 170A from the opening 170Aa, the passive circuit board 750 comes into contact with the side portion 178A. In this state, the raised portions 175Aa and 175Ab return to their original positions. In this process, the capacitor 756 disposed on the passive circuit board 750 passes between the raised portions 175Aa and 175Ab. The raised portions 175Aa and 175Ab do not have to return completely to their original positions because they are in contact with the end face or edge of the passive circuit board 750. In other words, the elastic portions 1755Aa, 1755Ab may continue to be subjected to force F in the upward direction D3a by the passive circuit board 750, but the positions of the raised portions 175Aa, 175Ab return to the original positions at least to the extent that the passive circuit board 750 cannot pass through the opening 170Aa.

[0060] When the passive circuit board 750 is accommodated in the board holder 170A, its position in the left-right direction D1 is determined by the side surface portion 171Aa and the side surface portion 171Ab, its position in the front-rear direction D2 is determined by the side surface portion 178A and the raised portions 175Aa and 175Ab, and its position in the up-down direction D3 is determined by the bottom surface portion 179A and the lid portions 172Aa and 172Ab. In this manner, the passive circuit board 750 is held by the board holder 170A. Note that, as in the first embodiment, a configuration equivalent to the elastic portion 1775a and the raised portion 177a may be provided in the board holder 170A. Also, a protrusion may be provided on the surface of the lid portions 172Aa and 172Ab in the upward direction D3a, so that a force in the upward direction D3a is applied to the passive circuit board 750 from the protrusion. In this case, this configuration can be realized if the cover portions 172Aa, 172Ab are elastically deformed in the downward direction D3b when the passive circuit board 750 is held.

[0061] With the raised portions 175Aa and 175Ab moved downward in the D3b direction, the passive circuit board 750 can be slid toward the opening 170Aa to remove the passive circuit board 750 from the board holder 170A. In this manner, the board holder 170A removably holds the passive circuit board 750.

[0062] In this way, the substrate holder 170A is formed integrally with the key 10, and particularly when the key 10 and the substrate holder 170A are formed integrally by injection molding, the fixing member 190 in the first embodiment may not be present, although some shapes are restricted due to manufacturing limitations.

[0063] <Third embodiment> In the third embodiment, a board holder 170B that detachably holds a passive circuit board 750 by opening and closing a lid will be described with reference to FIGS.

[0064] FIG. 14 is a diagram illustrating a board holder from which a passive circuit board has been removed in the third embodiment of the present invention. FIG. 15 is a diagram illustrating a state in which a passive circuit board is disposed on the board holder in the third embodiment of the present invention. FIG. 16 is a cross section (cutting line Cc1-Cc2) in a state in which a passive circuit board is disposed on the board holder in the third embodiment of the present invention. 17 is a diagram illustrating a cross section of the passive circuit board attached to the board holder by closing the cover 172B in FIG. 16. In this example, the board holder 170B is made of resin and manufactured by injection molding. The board holder 170B has a substantially rectangular parallelepiped shape with a portion open, and one side has a cover structure that can be opened and closed.

[0065] A plate-shaped bottom surface portion 179B is disposed on the upward direction D3a (key 10 side) of the substrate holder 170B. A bottom surface portion 179Ba is disposed on the forward direction D2a of the bottom surface portion 179B, and a bottom surface portion 179Bb is disposed on the rear direction D2b. The bottom surface portion 179Ba includes a through hole 1795Ba, and the bottom surface portion 179Bb includes a through hole 1795Bb. These through holes 1795Ba, 1795Bb may be used to place a fixing member for fixing the substrate holder 170B to the key 10, and may have the same function as the through holes 1795a, 1795b in the first embodiment, for example.

[0066] A side surface portion 171Ba is disposed at an end portion in the left direction D1a of the bottom surface portion 179B. A side surface portion 171Bb is disposed at an end portion in the right direction D1b of the bottom surface portion 179B. A side surface portion 174B is disposed at an end portion in the front direction D2a of the bottom surface portion 179B. A side surface portion 178B is disposed at an end portion in the rear direction D2b of the bottom surface portion 179B. The side surface portions 171Ba, 171Bb, 174B, and 178B are plate-shaped members including a portion that is substantially perpendicular to the bottom surface portion 179. A protruding portion 175Ba is disposed at the side surface portion 174B. The protruding portion 175Ba protrudes in the front direction D2a relative to the side surface portion 174B. A plate-shaped lid portion 172B is disposed at an end portion in the downward direction D3b of the side surface portion 178B via a hinge portion 1725B. A notch 172Ba is formed in the approximate center of the lid portion 172B. An engagement portion 175Bb is disposed at the end of the lid portion 172B opposite the hinge portion 1725B.

[0067] The lid 172B can rotate with respect to the bottom 179B about the hinge 1725B. That is, the positional relationship between the lid 172B and the bottom 179B can be changed. With the lid 172B open, the passive circuit board 750 is placed on the bottom 179B, and the lid 172B is moved in the closing direction C. At this time, a force F is applied to the engagement portion 175Bb in a direction away from the lid 172B, so that the engagement portion 175Bb passes through the protruding portion 175Ba and moves upward D3a of the protruding portion 175Ba. This closes the lid 172B, so that the passive circuit board 750 is sandwiched between two plate-like members, that is, between the lid 172B and the bottom 179B (first state). In this state, the passive circuit board 750 is held by the board holder 170B. At this time, the capacitor 756 in the passive circuit board 750 is prevented from coming into contact with the lid portion 172B by the cutout portion 172Ba.

[0068] When the passive circuit board 750 is accommodated in the board holder 170B, the position in the left-right direction D1 is determined by the side portion 171Ba and the side portion 171Bb, the position in the front-rear direction D2 is determined by the side portion 178B and the side portion 174B, and the position in the up-down direction D3 is determined by the bottom portion 179B and the lid portion 172B. In this manner, the passive circuit board 750 is held by the board holder 170B. As in the first embodiment, a configuration corresponding to the elastic portion 1775a and the protruding portion 177a may be provided on the board holder 170B. An elastic body or nonwoven fabric may be sandwiched between the lid portion 172B and the passive circuit board 750, and the lid portion 172B may apply a force in the upward direction D3a to the passive circuit board 750, so that the board holder 170B holds the passive circuit board 750 more firmly.

[0069] When the cover 172B is opened with the engaging portion 175Bb receiving the force F and the cover 172B and the bottom portion 179B are separated (second state), the passive circuit board 750 is released from the holding state. In this manner, the board holder 170B removably holds the passive circuit board 750.

[0070] <Fourth embodiment> In the fourth embodiment, a board holder 170C that detachably holds a passive circuit board 750 by snap-fitting will be described with reference to FIGS.

[0071] Fig. 18 is a diagram illustrating a substrate holder from which a passive circuit board has been removed in a fourth embodiment of the present invention. Fig. 19 is a diagram illustrating a cross section (cutting line Dc1-Dc2) of a substrate holder in a fourth embodiment of the present invention. Fig. 20 is a diagram illustrating a passive circuit board in a fourth embodiment of the present invention. Fig. 21 is a diagram illustrating a substrate holder to which a passive circuit board in a fourth embodiment of the present invention has been attached. In this example, the substrate holder 170C is made of resin and manufactured by injection molding.

[0072] A plate-shaped bottom surface portion 179C is disposed in the upward direction D3a (key 10 side) of the substrate holder 170C. A bottom surface portion 179Ca is disposed in the forward direction D2a of the bottom surface portion 179C, and a bottom surface portion 179Cb is disposed in the rear direction D2b. The bottom surface portion 179Ca has a through hole 1795Ca, and the bottom surface portion 179Cb has a through hole 1795Cb. These through holes 1795Ca and 1795Cb may be used to place a fixing member for fixing the substrate holder 170C to the key 10, and may have the same function as the through holes 1795a and 1795b in the first embodiment, for example. A protuberance portion 177C is disposed in the approximate center of the bottom surface portion 179C via an elastic portion 1775C. The elastic portion 1775C functions as an elastic body by being supported in a cantilever manner by the bottom surface portion 179C. The raised portion 177C is raised in the downward direction D3b relative to the bottom surface portion 179C. The bottom surface portion 179C has grooves 179Cc and 179Cd that are thinned at an end portion in the rear direction D3b.

[0073] At the end of the bottom surface portion 179C in the forward direction D2a, the side surface portion 174Ca, the elastic portion 1755C, and the side surface portion 174Cb extending toward the downward direction D3b are arranged in this order along the left-right direction D1. The side surface portions 174Ca, 174Cb, and the elastic portion 1755C are plate-like members including a portion that is approximately perpendicular to the bottom surface portion 179C. At the end of the elastic portion 1755C in the downward direction D3b, the protruding portion 175C is arranged. The elastic portion 1755C functions as an elastic body by being supported by the bottom surface portion 179C in a cantilever manner. The protruding portion 175C protrudes in the rear direction D2b from the elastic portion 1755C. The protruding portion 175 includes a portion that is approximately parallel to the bottom surface portion 179 on the surface on the upward direction D1a side.

[0074] A side surface portion 178C extending in the downward direction D3b is disposed at an end portion in the rear direction D2b of the bottom surface portion 179C. A guide portion 178Ca protruding in the forward direction D2a is disposed on the side surface portion 178C. The guide portion 178Ca is a plate-like member extending in the up-down direction D3 and the front-rear direction D2. A lid portion 173C extending in the forward direction D2a is disposed at an end portion in the downward direction D3b of the side surface portion 178C. The lid portion 173C is a plate-like member substantially parallel to the bottom surface portion 179C.

[0075] As shown in FIG. 20, the passive circuit board 750C has a cutout portion 7508C formed therein. The cutout portion 7508C and the guide portion 178Ca have a corresponding shape. When the passive circuit board 750C is attached to the board holder 170C, first, as shown in FIG. 19, the passive circuit board 750C is placed on the board holder 170C so that the guide portion 178Ca is inserted into the cutout portion 7508C. Thereafter, when a force F is applied to the protruding portion 175C in the forward direction D2a, the elastic portion 1755C is elastically deformed, and the protruding portion 175C moves in the forward direction D2a. Then, the passive circuit board 750C is pressed toward the bottom surface portion 179C by a force Fc, so that the passive circuit board 750C is attached to the board holder 170C. Fits into 170C.

[0076] The position of the passive circuit board 750C in the left-right direction D1 is determined by the fitting of the guide portion 178Ca of the board holder 170C with the notch portion 7508C (particularly the contact between the guide portion 178Ca and the notch portion 7508C in the left-right direction D1), and the position of the passive circuit board 750C in the front-rear direction D2 is determined by the guide portion 178Ca (or the side portion 178C) and the side portions 174Ca and 174Cb. The protuberances 177C moved in the upward direction D3a by the passive circuit board 750C try to return to their original positions by the restoring forces of the elastic portions 1775C. Therefore, the protuberances 177C apply a force in the downward direction D3b to the passive circuit board 750C, and the passive circuit board 750C is pressed against the cover portion 173C and the protuberances 177C. This determines the position of the passive circuit board 750C in the up-down direction D3. In this manner, the passive circuit board 750C is held by the board holder 170C.

[0077] On the other hand, in a state where the passive circuit board 750C is held by the board holder 170C, the force F is applied to elastically deform the elastic portion 1755C and move the protruding portion 175C in the forward direction D2a, thereby releasing the holding of the passive circuit board 750C by the board holder 170C. In this manner, in a state where the elastic portion 1755C is more elastically deformed than when the passive circuit board 750C is held by the board holder 170C, the holding of the passive circuit board 750C is released.

[0078] <Fifth embodiment> In the fifth embodiment, a passive circuit board 750D in which two cutout portions 7505D and 7508D are formed and a board holder 170D that holds the passive circuit board 750D will be described with reference to FIGS.

[0079] 22 is a diagram illustrating a passive circuit board according to the fifth embodiment of the present invention. A cutout portion 7508D in a passive circuit board 750D is the same as the cutout portion 7508C in the fourth embodiment. A cutout portion 7505D is formed at a position opposite to the cutout portion 7508D.

[0080] 23 is a diagram for explaining a cross section (corresponding to FIG. 19) of a substrate holder in the fifth embodiment of the present invention. Substrate holder 170D has almost the same configuration as substrate holder 170C, but does not have side portions 174Ca and 174Cb in substrate holder 170C, and a guide portion 1758D protruding from elastic portion 1755C is disposed on the bottom surface portion 179C side of protruding portion 175C. The same components are denoted by the same reference numerals as substrate holder 170C in the fourth embodiment. Guide portion 1758D has a shape corresponding to cutout portion 7505D, and when passive circuit substrate 750D is held by substrate holder 170D, guide portion 1758D is fitted into cutout portion 7505D.

[0081] In this example, in a state where the passive circuit board 750D is held by the board holder 170D, the position of the passive circuit board 750D in the left-right direction D1 is determined by the fitting of the guide portion 178Ca with the notch portion 7508D (particularly, the contact between the guide portion 178Ca and the notch portion 7508D in the left-right direction D1) and the fitting of the guide portion 1758D with the notch portion 7505D (particularly, the contact between the guide portion 1758D and the notch portion 7505D in the left-right direction D1), and the position of the passive circuit board 750D in the front-rear direction D2 is determined by the guide portion 178Ca (or the side portion 178C) and the guide portion 1758D (or the elastic portion 1755C). The position of the passive circuit board 750D in the up-down direction D3 is determined in the same manner as in the fourth embodiment. In this manner, the passive circuit board 750D is held by the board holder 170D.

[0082] On the other hand, in a state where the passive circuit board 750D is held by the board holder 170D, the force F is applied to elastically deform the elastic portion 1755D and move the protruding portion 175D in the forward direction D2a, thereby releasing the holding of the passive circuit board 750D by the board holder 170D. In this manner, in a state where the elastic portion 1755C is more elastically deformed than when the passive circuit board 750D is held by the board holder 170D, the holding of the passive circuit board 750D is released.

[0083] Sixth embodiment In the sixth embodiment, a keyboard device 1E including a substrate holder 170E that is fixed not to the key 10 but to a member that interlocks with the key 10 will be described with reference to Figures 24 to 26. Here, the key connection part 301 of the load section 30 is exemplified as the member that interlocks with the key 10.

[0084] FIG. 24 is a diagram for explaining the internal structure (when a key is released) of a keyboard device according to a sixth embodiment of the present invention. FIG. 25 is a diagram for explaining the internal structure (when a white key is pressed) of a keyboard device according to a sixth embodiment of the present invention. In the keyboard device 1E, the board holder 170E is fixed to the lower surface side of the key connection part 301. Therefore, the board holding part 207E on which the active circuit board 700 is arranged is arranged below the key connection part 301. When the key 10 is pressed in the state of FIG. 24, as shown in FIG. 25, the load part 30 rotates in conjunction with the rotation of the key 10, so that the weight part 305 moves upward and collides with the upper stopper 353, so that further movement is restricted. At this time, as shown in FIG. 25, the key connection part 301 moves downward, and the active circuit board 700 and the passive circuit board 750D approach each other. Here, substrate holder 170E is positioned close to the center of rotation so that the amount of movement during rotation is small; however, substrate holder 170E may be positioned away from the center of rotation depending on the application.

[0085] The difference in angle between the passive circuit board 750D and the active circuit board 700 when the key is released and when it is pressed is greater than in the first embodiment in which the passive circuit board 750D is attached to the key 10. Even if the change in angle is large, the amount of magnetic flux passing through the passive coil 751 changes, so there is no problem even if the positional relationship between the passive coil 751 and the active coil 701 is as in the sixth embodiment.

[0086] FIG. 26 is a diagram for explaining a board holder to which a passive circuit board according to the sixth embodiment of the present invention is attached. In this example, the board holder 170E is applied with a configuration corresponding to the board holder 170D according to the fifth embodiment as it is. Here, the board holder 170E and the key connection part 301 are integrally formed by injection molding and are formed of the same material. Since the board holder 170E and the board holder 170D have the same configuration, the passive circuit board 750D shown in the fifth embodiment is attached to the board holder 170E. The bottom surface part 179E, the side surface part 178E, the cover part 173E, the guide part 178Ea, the elastic part 1755E, and the raised part 175E of the board holder 170E correspond to the bottom surface part 179C, the side surface part 178C, the cover part 173C, the guide part 178Ca, the elastic part 1755C, and the raised part 175D of the board holder 170D, respectively.

[0087] Seventh embodiment In the seventh embodiment, a keyboard device 1F including a substrate holder 170F attached to a portion other than the key 10 and the load portion 30 will be described with reference to Figs. 27 to 31.

[0088] Fig. 27 is a diagram illustrating the internal structure of a keyboard device according to a seventh embodiment of the present invention (when a key is released). Fig. 28 is a diagram illustrating the internal structure of a keyboard device according to a seventh embodiment of the present invention (when a white key is pressed). In the keyboard device 1F, the board holder 170F is disposed in the board holding part 207E below the key connection part 301 so as to cover the active circuit board 700. The board holder 170F is a dome-shaped structure made of an elastic body such as rubber, A mechanism for holding a passive circuit board 750F is provided in a part of the key holder 170. When the key 10 is pressed in the state shown in Fig. 27, the load unit 30 rotates in conjunction with the rotation of the key 10, causing the weight unit 305 to move upward and collide with the upper stopper 353, restricting further movement, as shown in Fig. 28. At this time, the key connecting unit 301 comes into contact with the board holder 170F as it moves downward.

[0089] The key connection part 301 further moves downward, thereby deforming the board holder 170F. By deforming the board holder 170F, the passive circuit board 750F held by the board holder 170F approaches the active circuit board 700. When the key 10 returns to its original position and assumes the state shown in FIG. 27, the board holder 170F returns to its original shape due to its own restoring force, and the passive circuit board 750F moves away from the active circuit board 700. In this way, the shape of the board holder 170F changes in accordance with the movement of the key 10 in a part of the key pressing range. Therefore, the board holder 170F can be said to be a member that moves in conjunction with the key 10. Next, the board holder 170F will be described.

[0090] FIG. 29 is a diagram for explaining a board holder to which a passive circuit board is attached in the seventh embodiment of the present invention. FIG. 30 is a diagram for explaining the inside of a board holder to which a passive circuit board is attached in the seventh embodiment of the present invention (a diagram of the board holder seen from below). FIG. 31 is a diagram for explaining a cross section (cutting line Ec1-Ec2) of the board holder in the seventh embodiment of the present invention. The board holder 170F includes a base portion 170Fz and a portion forming a dome shape expanding in the upward direction D3a from the base portion 170Fz. The portion forming the dome shape includes a lower side portion 170Fy, an upper side portion 170Fx, and a top surface portion 170Ft. The upper side portion 170Fx is provided with lid portions 172Fa and 172Fb protruding toward the inner surface side.

[0091] The base portion 170Fz has protrusions 1705Fz that protrude in the downward direction D3b, which correspond to the four corners of the base portion 170Fz. The protrusions 1705Fz are fitted into holes TH provided in the active circuit board 700. This determines the position of the board holder 170F (passive circuit board 750F) relative to the active circuit board 700.

[0092] The passive circuit board 750F has an outer periphery that conforms to the shape of the upper side surface portion 170Fx, and unlike the passive circuit board 750 in the above-mentioned embodiment, the portions corresponding to the corners of the rectangle are formed in an arc shape. The passive circuit board 750F is held by the board holder 170F by being sandwiched between the top surface portion 170Ft and the lid portions 172Fa and 172Fb. Since the passive circuit board 750F is a rigid structure, the shape of the board holder 170F is maintained by the influence of the passive circuit board 750F even though it is an elastic body on the top surface portion 170Ft side from the lid portions 172Fa and 172Fb, and it hardly deforms. Therefore, when the key connection portion 301 deforms the board holder 170F, mainly the lower side surface portion 170Fy deforms, and the top surface portion 170Ft approaches the active circuit board 700.

[0093] When the passive circuit board 750F is attached to or detached from the board holder 170F, a force F is applied to spread the lid portions 172Fa and 172Fb outward, thereby deforming the board holder 170F and expanding the opening 170Fa to an extent that the passive circuit board 750F can pass through. In other words, the passive circuit board 750F passes through the gap between the lid portions 172Fa and 172Fb, thereby allowing the passive circuit board 750F to be attached to or detached from the board holder 170F.

[0094] It should be noted that the substrate holder 170F is provided corresponding to each key 10. The base portions 170Fz of adjacent substrate holders 170F may be connected to each other.

[0095] Eighth embodiment In the eighth embodiment, a substrate holder 170G formed by injection molding a substrate holder 170F like that of the seventh embodiment, with a passive circuit substrate 750F also placed in the injection molding die will be described with reference to Figures 32 and 33.

[0096] FIG. 32 is a diagram illustrating the inside of a substrate holder to which a passive circuit board is attached in the eighth embodiment of the present invention. FIG. 33 is a diagram illustrating a cross section (cutting line Fc1-Fc2) of a substrate holder in the eighth embodiment of the present invention. The substrate holder 170G is an elastic body formed by injection molding, similar to the substrate holder 170F. In this example, the passive circuit board 750F is taken into the elastic body during injection molding, so the substrate holder 170G does not allow the passive circuit board 750F to be detached. The top surface portion 170Gt, the upper side surface portion 170Gx, the lower side surface portion 170Gy, the base portion 170Gz, and the protrusion portion 1705Gz of the substrate holder 170G correspond to the top surface portion 170Ft, the upper side surface portion 170Fx, the lower side surface portion 170Fy, the base portion 170Fz, and the protrusion portion 1705Fz of the substrate holder 170F, respectively.

[0097] On the other hand, in the substrate holder 170G, the configuration of the lid 172G arranged on the inner side of the upper side surface portion 170Gx is different from that of the lid 172Fa of the substrate holder 170F. The lid 172G has a through hole 172Gp. Although the through hole 172Gp does not necessarily have to be formed, in this example, the capacitor 756 of the passive circuit board 750F is exposed. Depending on the conditions of the injection molding, the resin may apply stress to the capacitor 756 due to the expansion and contraction of the material. As in this example, the influence of such stress can be avoided by forming the through hole 172Gp that exposes the capacitor 756 in the lid 172G. On the other hand, it is desirable for the through hole 172Gp to be as small as possible in order to hold the passive circuit board 750F. Note that, during injection molding, it is desirable to support the passive circuit board 750F from the outside with a plurality of pins or the like in order to prevent the position of the passive circuit board 750F from changing. In this case, for example, through holes of a shape corresponding to the portion where the pins are arranged remain in the top surface portion 170Ft and the upper side surface portion 170Fx. However, it is preferable that all the through holes, including the above-mentioned through hole 172Gp, are of a size that does not allow the passive circuit board 750F to pass through.

[0098] In this way, by forming the substrate holder 170G and the passive circuit board 750F integrally, the substrate holder 170G cannot be configured to detachably mount the passive circuit board 750F, but this is effective in cases where it is efficient to replace the entire substrate holder 170G.

[0099] <Ninth embodiment> In the ninth embodiment, a substrate holder 170H in which the substrate holder 170G in the eighth embodiment is applied instead of the substrate holder 170E in the sixth embodiment will be described with reference to FIG.

[0100] FIG. 34 is a diagram for explaining a board holder to which a passive circuit board is attached in the ninth embodiment of the present invention. In this example, the board holder 170H is disposed on the lower surface side of the key connection part 301. The board holder 170H and the key connection part 301 are integrally formed by injection molding. At this time, the passive circuit board 750 is also placed in a mold and formed together with the board holder 170H. As with the board holder 170G of the eighth embodiment, a through hole 1705Ha is formed in the lower surface part 170Ha of the board holder 170H. The capacitor 756 of the passive circuit board 750 is exposed from the board holder 170H through the through hole 1705Ha. In addition, the side parts 170Hb and 170Hc are formed with through holes 1705Hb and 1705Hc. The through holes 1705Hb and 1705Hc are holes formed because pins supporting the passive circuit board 750 were disposed during injection molding.

[0101] Tenth embodiment The magnetic induction sensor can also be used in an acoustic piano. In the tenth embodiment, a grand piano 1J using a substrate holder 170 will be described with reference to Figs.

[0102] FIG. 35 is a diagram for explaining the internal structure (when a key is released) of a keyboard device according to the tenth embodiment of the present invention. FIG. 36 is a diagram for explaining the mounting position of the board holder according to the tenth embodiment of the present invention. In this example, the board holder 170 is attached to the hammer shank 305J of the grand piano 1J by a fixing member 190J. The fixing member 190J has a shape that surrounds the axis of the hammer shank 305J. When the outer edge of the hammer shank 305J is not a circle in its cross section (cross section perpendicular to the longitudinal direction) as in the case of the hammer shank 305J shown in FIG. 36, rotation around the axis can be avoided by using a fixing member 190J having an inner surface shape that matches the outer edge shape. The fixing member 190J may be bonded to the hammer shank 305J. The fixing member 190 described in the first embodiment may be inserted into the hammer shank 305J to fix the board holder 170 to the hammer shank 305J.

[0103] The active circuit board 700 is disposed on a board holding portion 207J fixed to the frame 20J. In this example, the active circuit board 700 is disposed on the lower surface side of the board holding portion 207J, but if the board holding portion 207J is a resin structure, it may be disposed on the upper surface side of the board holding portion 207J. Furthermore, the board holder 170 may be attached to another position on the hammer shank 305J.

[0104] Fig. 37 is a diagram illustrating another example of the mounting position of the substrate holder in the tenth embodiment of the present invention. In the example shown in Fig. 37, the substrate holder 170 is mounted on the surface of the hammer shank 305J opposite to the portion where the hammer roller 309J is mounted. This surface is a portion of the hammer shank 305J that has a relatively wide flat surface. This makes it easy to position the substrate holder 170.

[0105] The board holder 170 may be attached to the jack 307J other than the hammer shank 305J, or may be attached to the key 10J. When the board holder 170 is attached to the jack 307J, the active circuit board 700 may be placed on the frame 20J. In this case, the active circuit board 700 may be placed upright so that the normal line of its surface faces the jack 307J. Also, when the board holder 170 is attached to the key 10J, the active circuit board 700 may be placed on the shelf 50J.

[0106] <Eleventh embodiment> In the eleventh embodiment, an upright piano 1K using a substrate holder 170 will be described with reference to FIGS.

[0107] FIG. 38 is a diagram for explaining the internal structure (when a key is released) of a keyboard device according to an eleventh embodiment of the present invention. FIG. 39 is a diagram for explaining the mounting position of the board holder according to the eleventh embodiment of the present invention. In this example, the board holder 170 is attached to the hammer shank 305K of the upright piano 1K by a fixing member 190K. The fixing member 190K has a shape that surrounds the axis of the hammer shank 305K. The hammer shank 305K has a cylindrical shape. Therefore, in order to prevent the board holder 170 from rotating around the hammer shank 305K as a central axis, a part of the butt 311K that supports the hammer shank 305K and the board holder 170 are brought into contact with each other in the area CA. The fixing member 190J may be bonded to the hammer shank 305J. The fixing member 190 described in the first embodiment may be inserted into the butt 311K in the area CA and fixed.

[0108] The active circuit board 700 is disposed on a board holding portion 207K that is fixed to a frame (not shown). Also, the board holder 170 may be attached to the hammer shank 305K in a different manner.

[0109] 40 is a diagram illustrating an example in which the substrate holder in the eleventh embodiment of the present invention is attached in a different form. In this example, the fixing member 190 described in the first embodiment is inserted into the hammer shank 305K to fix the substrate holder 170 to the hammer shank 305K. At this time, an auxiliary member 195M may be disposed to fill the gap between the substrate holder 170 and the hammer shank 305K.

[0110] <Twelfth embodiment> In the twelfth embodiment, a board holder 170N that holds a passive circuit board 750N by a different configuration from the board holder 170E formed integrally with the key connection portion 301 as in the sixth embodiment will be described with reference to Figures 41 and 42.

[0111] Fig. 41 is a diagram illustrating a board holder to which a passive circuit board is attached in the twelfth embodiment of the present invention. Fig. 42 is a diagram illustrating a cross section (cutting line Gc1-Gc2) of the board holder in the twelfth embodiment of the present invention. Fig. 41 is a diagram of the board holder 170N as viewed from below. The board holder 170N is disposed below the key connection part 301.

[0112] The bottom surface portion 179N, the side surface portion 178N, the lid portion 173N, and the guide portion 178Na of the substrate holder 170N correspond to the bottom surface portion 179E, the side surface portion 178E, the lid portion 173E, and the guide portion 178Ea of the substrate holder 170E shown in Fig. 26. The cutout portion 7508N of the passive circuit board 750N attached to the substrate holder 170N corresponds to the cutout portion 7508D of the passive circuit board 750D shown in Fig. 22.

[0113] On the other hand, the board holder 170N includes a male screw 175N and a female screw 1795N, instead of the board holder 170E including the elastic portion 1755E and the raised portion 175E. The female screw 1795N is formed on the bottom surface portion 179N. The passive circuit board 750N includes an opening 7505N, instead of the passive circuit board 750D including the notch portion 7505D. When the male screw 175N is fastened to the female screw 1795N, the male screw 175N passes through the opening 7505N, and the head of the male screw 175N contacts the surface 750Na of the passive circuit board 750N.

[0114] In this state, the passive circuit board 750N is sandwiched between the head and bottom surface portion 179N of the male screw 175N to determine its position in the up-down direction D3, its position in the front-rear direction D2 is determined by the side surface portion 178E and the shaft portion of the male screw 175N, and its position in the left-right direction D1 is determined by the engagement between the guide portion 178Na and the cutout portion 7508N (particularly, the contact between the guide portion 178Na and the cutout portion 7508N in the left-right direction D1). When the male screw 175N is removed from the female screw 1795N, the passive circuit board 750N is released from the board holder 170N.

[0115] <Thirteenth embodiment> In the twelfth embodiment, a board holder 170P that holds a passive circuit board 750P by a different configuration from the board holder 170N in the twelfth embodiment will be described with reference to FIGS.

[0116] Fig. 43 is a diagram for explaining a substrate holder to which a passive circuit substrate is attached in the thirteenth embodiment of the present invention. Fig. 44 is a cross-sectional view of the substrate holder in the thirteenth embodiment of the present invention. 1 is a diagram illustrating a cutting line Hc1-Hc2. The substrate holder 170P is disposed below the key connecting portion 301. FIG.

[0117] The male threads 175Pb and the female threads 1795Pb in the substrate holder 170P correspond to the male threads 175N and the female threads 1795N in the substrate holder 170N, respectively. The openings 7505Pb in the passive circuit board 750P attached to the substrate holder 170P correspond to the openings 7505N in the passive circuit board 750N.

[0118] The board holder 170P includes male screws 175Pa and female screws 1795Pa, instead of the board holder 170N including the side portion 178N, the cover portion 173N, and the guide portion 178Na. The passive circuit board 750P includes an opening 7505Pa, instead of the passive circuit board 750N including the notch portion 7508N. In this example, the board holder 170P includes protrusions 1755Pa, 1755Pb protruding downward from the bottom surface portion 179P. The passive circuit board 750P includes openings 7555Pa, 7555Pb into which the protrusions 1755Pa, 1755Pb are inserted.

[0119] In this example, the opening 7505Pa is configured such that a portion of the opening 7505Pa reaches an end of the passive circuit board 750P and a portion of the opening 7505Pa is not surrounded by the passive circuit board 750P, but the opening 7505Pa may be formed in a position where it is entirely surrounded. When a portion of the opening 7505Pa is not surrounded by the passive circuit board 750P, it is preferable that the size of the unsurrounded portion is smaller than the diameter of the shaft of the male screw 175Pa, that is, that the shaft of the male screw 175Pa cannot pass from the inside to the outside of the opening 7505Pa.

[0120] In a state where the male screw 175Pa is fastened to the female screw 1795Pa and the male screw 175Pb is fastened to the female screw 1795Pb, the male screws 175Pa, 175Pb penetrate the openings 7505Pa, 7505Pb, respectively, and the heads of the male screws 175Pa, 175Pb contact the surface 750Pb of the passive circuit board 750P. The protrusions 1755Pa, 1755Pb penetrate the openings 7555Pa, 7555Pb, respectively. The protrusions 1755Pa do not have to penetrate the openings 7555Pa as long as they enter the inside of the openings 7555Pa. The same applies to the protrusions 1755Pb.

[0121] In this state, the position of the passive circuit board 750P in the up-down direction D3 is determined by being sandwiched between the heads of the male screws 175Pa and 175Pb and the bottom surface portion 179P, and the position of the passive circuit board 750P in the left-right direction D1 and the front-rear direction D2 is determined by the protrusions 1755Pa and 1755Pb. In the absence of the protrusions 1755Pa and 1755Pb, the position of the passive circuit board 750P in the left-right direction D1 and the front-rear direction D2 may be determined by the shafts of the male screws 175Pa and 175Pb. The position of the passive circuit board 750P in the left-right direction D1 and the front-rear direction D2 may be determined by two of the protrusions 1755Pa and 1755Pb and the male screws 175Pa and 175Pb. In order to determine the position in the up-down direction D3, at least one of the male screws 175Pa and 175Pb needs to be present.

[0122] The male screw 175Pa is removed from the female screw 1795Pa, and the male screw 175Pb is removed from the female screw 1795Pb, whereby the passive circuit board 750P is released from the board holder 170P.

[0123] In this example, a recess 1756P is further formed in the bottom surface portion 179P. The recess 1756P is formed at a position corresponding to the capacitor 756P of the passive circuit board 750P. Therefore, even if the passive circuit board 750P is arranged so that the capacitor 756P faces the bottom surface portion 179P side, the capacitor 756P can be contained within the area of ​​the recess 1756P. This prevents physical interference with the capacitor 756P from other structures. This can be prevented.

[0124] <Modification> Although one embodiment of the present invention has been described above, this embodiment can also be modified in various forms as described below. The above-mentioned embodiment and the modified examples described below can also be applied in combination with each other. Furthermore, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration. In the following description, unless otherwise specified, the first embodiment will be described as a modified example, but it can also be applied as a modified example of other embodiments.

[0125] (1) Although the passive coil 751 is provided on the passive circuit board 750, a metal plate may be provided instead of the passive coil 751. Even with this configuration, it is possible to modulate the output signal of the active circuit 770 by eddy currents generated in the metal plate, similar to the passive coil 751. That is, in the passive circuit board 750, a conductor capable of absorbing energy via a magnetic field, such as a metal plate, may be disposed instead of a coil.

[0126] (2) In the first embodiment, the active coil 701 was arranged on the frame 20 side, and the passive coil 751 was held by the substrate holder 170 and arranged on the key 10 side. Since the passive coil 751 does not require a power supply, it is easy in design to provide it on the structure having a moving part, but the reverse arrangement is also possible. That is, the active coil 701 may be arranged on the key 10 side, and the passive coil 751 may be arranged on the frame 20 side. In this case, a configuration for supplying power, etc. may be provided in the substrate holder 170.

[0127] (3) The distance between the active coil 701 and the passive coil 751 is closer when the key is pressed than when it is released, but it may be closer when the key is released. This configuration may be realized via a member that is linked to the key 10, or the active circuit board 700 may be disposed on the top side of the key 10.

[0128] (4) Although one pair of an active circuit 770 and a passive circuit board 750 is provided for each key 10, multiple pairs may be provided for each key 10. For example, the movement amounts of multiple components may be measured by using a sensor that measures the amount of depression of the key 10 as in the first embodiment and a sensor that measures the movement amount of a component linked to the key 10 as in the sixth embodiment. Furthermore, multiple sensors may be provided on the key 10. In this case, the range in which each sensor can measure the amount of depression may be different. Furthermore, information regarding the sound generation timing and key depression speed may be generated based on a sensor provided on the load section 30, and information regarding the sound suppression timing may be generated based on a sensor provided on the key 10.

[0129] (5) The coil shape of the active coil 701 may take various forms other than those described above. The active coil 701 may be realized using a plurality of coils. The same applies to the passive coil 751. Various forms can be adopted for the active coil 701 and the passive coil 751 as long as the active coil 701 forms a magnetic field and the passive coil 751 is configured to cause anti-resonance in the active circuit 770 via the magnetic field.

[0130] (6) The active circuit board 700 is disposed on the frame 20 (board holding portion 207) that is not linked to the key 10. However, if the positional relationship between the active circuit board 700 and the passive circuit board 750 changes between when the key is released and when it is pressed, the active circuit board 700 may be disposed on a component that is linked to the key 10.

[0131] (7) The fixing member 190 for fixing the board holder 170 to the key 10 or a member interlocking with the key 10 may be a screw, a combination of bolts and nuts, double-sided tape, adhesive, tack, nailer, or hot bond, and may be of various materials and forms, but is preferably a material with a relative permeability close to 1 or an insulating material such as resin in order to reduce the effect on the magnetic field. In addition, if the key 10 is made of wood or an elastic material such as a specific resin, the board holder 170 and the key 10 may be fixed by pressing in using a dowel or the like. In addition, the passive circuit board 750 may be directly fixed to the key 10 or a member interlocking with the key 10 with a fixing member without using the board holder 170. Even in this case, the fixing member may be a double-sided tape, adhesive, tack, nailer, or hot bond, and may be of various materials and forms, but is preferably a material with a relative permeability close to 1 or an insulating material such as resin in order to reduce the effect on the magnetic field.

[0132] (8) The passive circuit board 750 and the active circuit board 700 are positioned so that their surfaces are substantially opposed to each other, and the coils provided on both surfaces move closer to or farther from each other in the substantially vertical direction D3 when the key 10 is operated, thereby changing the distance between them. The key press amount measuring unit 70 functions as a distance sensor by outputting a signal according to this distance. On the other hand, even if both surfaces are disposed substantially perpendicular to the operating surface of the key 10, the key press amount measuring unit 70 can function as a distance sensor in the same way. For example, assume that both surfaces of the passive circuit board 75 and the active circuit board 700 are disposed so as to have a normal line along the left-right direction D1. In this case, when viewed along the left-right direction D1, as the key 10 is pressed, the distance between the passive circuit board 750 and the active circuit board 700 changes, and the area where the two surfaces overlap changes. Such a change in area also changes the output signal from the active circuit board 700, so the key press amount measuring unit 70 can function as a distance sensor.

[0133] (9) In the above-mentioned embodiment, the electronic keyboard instrument is described as having the speaker 60 and the sound source unit 80, or as having a sound generating mechanism such as strings as an acoustic piano such as a grand piano or an upright piano, but the electronic keyboard instrument may be configured to omit the speaker 60 and the sound source unit 80. In this case, the key depression amount measurement unit 70 is used to record the performance of the keyboard or to output the performance signal to the outside.

[0134] As can be understood from the above description, the present invention is also specified as a device (music performance operation device) that controls sound generation by outputting an operation signal corresponding to a performance action to a sound source unit 80 or a sound generation mechanism. As exemplified in each of the above-mentioned embodiments, the musical performance operation device includes a musical instrument (keyboard device 1) that has a sound source unit 80 and outputs a sound signal, and a musical instrument that has a sound generation mechanism and generates sound. In addition to these musical instruments, the musical performance operation device may also include a device that does not output a sound signal (e.g., a MIDI controller) and a device that does not generate sound by itself (e.g., a pedal mechanism). In this case, the keys and pedals are specified as operators for musical performance operation. In this way, the musical performance operation device includes a device that controls the generation of sound and changes the generation mode of the sound, or outputs a sound signal, in response to the player (operator) operating the operators with his / her hands or feet.

[0135] When applied to a pedal mechanism, a structure is provided in which a board holder 170 is fixed to a pedal serving as an operator, a passive circuit board 750 held by the board holder 170 faces an active circuit board 700 provided on a support part that supports the pedal so that it can be operated, and the operation can be detected by changing the distance (positional relationship) between the passive circuit board 750 and the active circuit board 700 when the pedal is operated. [Explanation of symbols]

[0136] 1,1E,1F...keyboard device, 1J...grand piano, 1K...upright piano, 10,10J...key, 10b...black key, 10w...white key, 20,20J...frame, 30...load section, 5 0...housing, 50J...shelf, 60...speaker, 70...key press amount measurement section, 80...sound source section, 90...operation section, 103...load connection section, 105...elastic section, 170, 170A, 170B, 170C, 170D, 170E, 170F, 170G, 170H, 170N, 170P...circuit board holder, 170a, 170Aa, 170Fa, 7505N, 7505Pa, 7505Pb, 7555Pa, 7555Pb...opening, 170Ft, 170Gt...top surface, 170Fx, 170Gx...upper side section, 170Fy, 1 70Gy...lower side part, 170Fz,170Gz...base part, 170Ha...bottom part, 170Hb,170Hc,171a,171Aa,171Ab,171b,171Ba,171Bb,174B,174Ca,174Cb,178,178A ,178B,178C,178E,178N...Side part, 172a,172Aa,172Ab,172b,172B,172Fa,172Fb,172G,173a,173b,173C,173E,173N...Lid part, 172Ba,7505D,7 508C, 7508D, 7508N...notch portion, 172Gp, 1705Ha, 1705Hb, 1705Hc, 1795a, 1795b...through hole, 175, 175Aa, 175Ab, 175Ba, 175C, 175E, 177a, 177b, 177C...raised portion, 175Bb...engagement portion, 175N, 175Pa, 175Pb...male screw, 1755Pa, 1755Pb...projection portion, 178Ca, 178Ea, 1758D, 178Na...guide portion, 179, 179A, 179B, 179Ba, 179 Bb, 179C, 179Ca, 179Cb, 179E, 179N, 179P... bottom surface portion, 179Cc, 179Cd, 1795c... groove portion, 1795N, 1795Pa, 1795Pb... female screw, 190, 190J, 190K... fixing member, 190a, 190b... key embedding portion, 190c... plate-shaped member, 195M... auxiliary member, 201... key guide portion, 203... key support portion, 205... rib portion, 207, 207E, 207J, 207K... board holding portion, 301... key connection portion, 303... bearing, 305... weight portion, 305J,305K...hammer shank, 307J...jack, 309J...hammer roller, 311K...butt, 351...lower stopper, 353...upper stopper, 700...active circuit board, 701...active coil, 701a...wiring, 701b...wiring, 701x...first coil, 701y...second coil, 703a...signal input section, 703b...signal output section, 706a, 706b...capacitor, 707a, 707b...resistor, 708...ground wiring, 709...multiplexer, 750, 750C, 750 D, 750F, 750N, 750P... Passive circuit board, 750a, 750b, 750Na... Surface, 751... Passive coil, 751x, 751y... Coil, 751xt1, 751xt2, 751yt1, 751yt2... Hole, 756... Capacitor, 770... Active circuit, 1725a, 1725b, 1735a, 1735b... Linear protrusion, 1725B... Hinge part, 1755, 1755Aa, 1755Ab, 1755C, 1755E, 1775a, 1775b, 1775C... Elastic part,

Claims

1. A magnetic induction sensor including a first substrate and a second substrate, each of which has a conductor disposed thereon; An operator that can be operated by an operator; a holding section for holding the first substrate between the operator and the second substrate, the holding section including: an elastically deformable portion that presses the first substrate in a first direction by a restoring force; and a member that is provided on a side of the first substrate in the first direction and determines a position in the first direction of the first substrate pressed by the elastically deformable portion; Equipped with At least one of the conductors disposed on the first substrate and the second substrate includes a coil; A keyboard device in which the first substrate is displaced relative to the second substrate in response to the movement of the operator.

2. A magnetic induction sensor including a first substrate and a second substrate, each of which has a conductor disposed thereon; An operator that can be operated by an operator; A first member that is linked to the operator; a holding portion for holding the first substrate between the first member and the second substrate, the holding portion having an elastically deformable portion for pressing the first substrate in a first direction by a restoring force, and a member provided on a side of the first substrate in the first direction for determining a position in the first direction of the first substrate pressed by the elastically deformable portion; Equipped with At least one of the conductors disposed on the first substrate and the second substrate includes a coil; A keyboard device in which the first substrate is displaced relative to the second substrate in response to the movement of the operator.

3. A magnetic induction sensor including a first substrate and a second substrate, each of which has a conductor disposed thereon; An operator that can be operated by an operator; a holding section for holding the first substrate between the operation element and the second substrate, the holding section having a deformable opening and capable of holding and releasing the first substrate in response to deformation of the opening; Equipped with At least one of the conductors disposed on the first substrate and the second substrate includes a coil; The holding portion has an elastically deformable portion, A keyboard device in which the first substrate is displaced relative to the second substrate by the elastically deformable portion deforming in response to the movement of the manipulator.

4. A magnetic induction sensor including a first substrate and a second substrate, each of which has a conductor disposed thereon; An operator that can be operated by an operator; A first member that is linked to the operator; a holding portion for holding the first substrate between the first member and the second substrate, the holding portion having a deformable opening and capable of holding and releasing the first substrate in response to deformation of the opening; Equipped with At least one of the conductors disposed on the first substrate and the second substrate includes a coil; The holding portion has an elastically deformable portion, A keyboard device in which the first substrate is displaced relative to the second substrate by the elastically deformable portion deforming in response to the movement of the manipulator.

5. 5. The keyboard device according to claim 3, wherein the first substrate is displaced relative to the second substrate when the elastically deformable portion is deformed by receiving a force from the manipulator.

6. 5. The keyboard device according to claim 3, wherein the elastically deformable portion is deformed in response to operation of the manipulator.

7. The elastically deformable portion is The actuator is deformed when the operator presses the actuator, 5. The keyboard device according to claim 3, wherein the keyboard device returns to its original shape by a restoring force when the operator releases the operating element.

8. The holding portion includes a top surface portion and a base portion, the base portion includes a protruding portion protruding from the base portion to an opposite side to the top surface portion, the second substrate includes a hole; The keyboard device according to claim 3 or 4, wherein the protrusion is fitted into the hole.

9. the holding portion includes a top surface portion, a base portion, and a lid portion between the top surface portion and the base portion; The keyboard device according to claim 3 or 4, wherein the first substrate is held between the top surface portion and the lid portion.

10. A magnetic induction sensor including a first substrate and a second substrate, each of which has a conductor disposed thereon; A movable member that can be moved by an operation of an operator; a holding section for holding the first substrate between the moving member and the second substrate, the holding section including: an elastically deformable portion for pressing the first substrate in a first direction by a restoring force; and a member provided on a side of the first substrate in the first direction for determining a position in the first direction of the first substrate pressed by the elastically deformable portion; Equipped with At least one of the conductors disposed on the first substrate and the second substrate includes a coil; A musical performance operation device in which the first base plate is displaced relative to the second base plate in response to the movement of the movable member.

11. A magnetic induction sensor including a first substrate and a second substrate, each of which has a conductor disposed thereon; A movable member that can be moved by an operation of an operator; a holding section for holding the first substrate between the moving member and the second substrate, the holding section having a deformable opening and capable of holding and releasing the first substrate in response to deformation of the opening; Equipped with At least one of the conductors disposed on the first substrate and the second substrate includes a coil; The holding portion has an elastically deformable portion, A musical performance operation device in which the first base plate is displaced relative to the second base plate in response to the movement of the movable member.

12. A magnetic induction sensor including a conductor and a substrate on which a coil is disposed; An operator that can be operated by an operator; a holding section for holding one of the conductor and the substrate between the operator and the substrate, the holding section having an elastically deformable portion for pressing one of the conductor and the substrate in a first direction by a restoring force, and a member provided on one of the conductor and the substrate on the first direction side, the member determining a position in the first direction of the one of the conductor and the substrate pressed by the elastically deformable portion; Equipped with A keyboard device in which one of the substrate and the conductor is displaced relative to the other in response to the movement of the operator.

13. A magnetic induction sensor including a conductor and a substrate on which a coil is disposed; An operator that can be operated by an operator; A first member that is linked to the operator; a holding portion for holding one of the conductor and the substrate between the first member and the substrate, the holding portion having an elastically deformable portion that presses one of the conductor and the substrate in a first direction by a restoring force, and a member that is provided on one of the conductor and the substrate on the first direction side and determines a position in the first direction of the one of the conductor and the substrate pressed by the elastically deformable portion; Equipped with A keyboard device in which one of the substrate and the conductor is displaced relative to the other in response to the movement of the operator.

14. A magnetic induction sensor including a conductor and a substrate on which a coil is disposed; An operator that can be operated by an operator; a holding section for holding one of the conductor and the substrate between the operator and the substrate, the holding section having a deformable opening and enabling the holding state of one of the conductor and the substrate to be released in response to deformation of the opening; Equipped with The holding portion has an elastically deformable portion, A keyboard device in which the elastically deformable portion deforms in response to movement of the operator, thereby displacing one of the substrate and the conductor relative to the other.

15. A magnetic induction sensor including a conductor and a substrate on which a coil is disposed; An operator that can be operated by an operator; A first member that is linked to the operator; a holding portion for holding one of the conductor and the substrate between the first member and the substrate, the holding portion having a deformable opening and capable of holding and releasing one of the conductor and the substrate in response to deformation of the opening; Equipped with The holding portion has an elastically deformable portion, A keyboard device in which the elastically deformable portion deforms in response to movement of the operator, thereby displacing one of the substrate and the conductor relative to the other.

16. A magnetic induction sensor including a conductor and a substrate on which a coil is disposed; A movable member that is movable in response to an operation by an operator; a holding section for holding one of the conductor and the substrate between the moving member and the substrate, the holding section having an elastically deformable section for pressing one of the conductor and the substrate in a first direction by a restoring force, and a member provided on one of the conductor and the substrate on the first direction side, the member determining a position in the first direction of the one of the conductor and the substrate pressed by the elastically deformable section; Equipped with A musical performance operation device in which the elastically deformable portion deforms in response to movement of the moving member, thereby displacing one of the substrate and the conductor relative to the other.

17. A magnetic induction sensor including a conductor and a substrate on which a coil is disposed; A movable member that is movable in response to an operation by an operator; a holding section for holding one of the conductor and the substrate between the moving member and the substrate, the holding section having a deformable opening and enabling the holding state of one of the conductor and the substrate and the release of the holding state in response to the deformation of the opening; Equipped with The holding portion has an elastically deformable portion, A musical performance operation device in which the elastically deformable portion deforms in response to movement of the moving member, thereby displacing one of the substrate and the conductor relative to the other.

Images