Abstract: A vibration plate for a musical instrument includes: a plate-shaped vibration plate main body that has a deformation anisotropy property; a first elongated reinforcing member disposed on a first face of the vibration plate main body, and that projects outwardly from the first face and extends along the first face in a direction that prevents the vibration plate main body from deforming; and a second elongated reinforcing member disposed on a second face of the vibration plate main body, and that projects outwardly from the second face and extends along the second face in the direction that prevents the vibration plate main body from deforming. As viewed from a thickness direction of the vibration plate main body, at least part of the first elongated reinforcing member overlaps with at least part of the second elongated reinforcing member.

Abstract: A sound bar includes an elongated member having a striking surface having an elongated shape. A weight of a striking surface side area of the elongated member, per unit volume of the striking surface side area of the elongated member, changes along a longitudinal direction of the striking surface. The striking surface side area is defined in a range of a uniform thickness from the striking surface.

Abstract: An object of the present invention is to provide a tone plate that can be increased in strength and that can produce the original sound of the material. A tone plate 10 according to an aspect of the present invention includes: a surface layer 1 having a striking surface 1a; and a base layer 2 that is laminated directly or indirectly onto a face of the surface layer 1 on the side opposite to the striking surface 1a, wherein the surface layer 1 is a layer of wood impregnated with resin, and the base layer 2 is not impregnated with resin.

Abstract: A musical instrument includes an exterior member comprising an isotropic fiberboard. The isotropic fiberboard includes a base surface that has a first region and a second region. A surface roughness of the first region differs from a surface roughness of the second region; and a degree of reflection of the first region differs from a degree of reflection of the second region.

Abstract: A keyboard instrument includes keys containing a woody material and including natural note keys and accidental note keys. Each natural note key includes a first playing surface played to produce a natural note. Each accidental note key includes a second playing surface played to produce an accidental note. The first playing surface has a first colorimetric value representing a first color, and the second playing surface color has a second colorimetric value representing a second color. Each of the first and second colorimetric values is derived in accordance with an SCI method in an L*a*b* color space. The first and second colorimetric values satisfy at least one of: a first condition: ?E*ab?17, or a second condition: ?H*<15 and ?1.7<L*/c*<1.7. The first and second playing surfaces differ from each other in at least one of optical reflectance or surface roughness.

Abstract: A vibration plate for a musical instrument includes: a plate-shaped vibration plate main body that has a deformation anisotropy property; a first elongated reinforcing member disposed on a first face of the vibration plate main body, and that projects outwardly from the first face and extends along the first face in a direction that prevents the vibration plate main body from deforming; and a second elongated reinforcing member disposed on a second face of the vibration plate main body, and that projects outwardly from the second face and extends along the second face in the direction that prevents the vibration plate main body from deforming. As viewed from a thickness direction of the vibration plate main body, at least part of the first elongated reinforcing member overlaps with at least part of the second elongated reinforcing member.

Abstract: A vibration plate for a musical instrument includes: a plate-shaped vibration plate main body that has a deformation anisotropy property; a first elongated reinforcing member disposed on a first face of the vibration plate main body, and that projects outwardly from the first face and extends along the first face in a direction that prevents the vibration plate main body from deforming; and a second elongated reinforcing member disposed on a second face of the vibration plate main body, and that projects outwardly from the second face and extends along the second face in the direction that prevents the vibration plate main body from deforming. As viewed from a thickness direction of the vibration plate main body, at least part of the first elongated reinforcing member overlaps with at least part of the second elongated reinforcing member.

Abstract: A sound bar has a striking surface. The sound bar includes: a surface layer having a first surface constituting at least a part of the striking surface and a second surface opposite across a thickness of the surface layer from the first surface; and a base fixed to the second surface of the surface layer. A cutout surface is provided on a peripheral edge portion of the striking surface. The first surface of the surface layer is smaller than the base in a plan view.

Abstract: A sound bar includes an elongated member having a striking surface having an elongated shape. A weight of a striking surface side area of the elongated member, per unit volume of the striking surface side area of the elongated member, changes along a longitudinal direction of the striking surface. The striking surface side area is defined in a range of a uniform thickness from the striking surface.

Abstract: An object of the present invention is to provide a tone plate that can be increased in strength and that can produce the original sound of the material. A tone plate 10 according to an aspect of the present invention includes: a surface layer 1 having a striking surface 1a; and a base layer 2 that is laminated directly or indirectly onto a face of the surface layer 1 on the side opposite to the striking surface 1a, wherein the surface layer 1 is a layer of wood impregnated with resin, and the base layer 2 is not impregnated with resin.

Abstract: A fastening structure for fastening a to-be-fastened component to a wooden component by using a screw, wherein the wooden component is made of wood having a specific gravity of 0.08 g/cm3 to 0.85 g/cm3 inclusive, the screw has a nominal diameter of 0.8 mm to 3.5 mm inclusive, and the distance between a neutral position in a longitudinal direction of an effective screw part, which is the portion where the wooden component and a male screw part formed in a shaft part of the screw mesh together, and the surface of the wooden component that comes into contact with the to-be-fastened component is 1 mm to 15 mm inclusive.

Abstract: A fastening structure for fastening a to-be-fastened component to a wooden component by using a screw, wherein the wooden component is made of wood having a specific gravity of 0.08 g/cm3 to 0.85 g/cm3 inclusive, the screw has a nominal diameter of 0.8 mm to 3.5 mm inclusive, and the distance between a neutral position in a longitudinal direction of an effective screw part, which is the portion where the wooden component and a male screw part formed in a shaft part of the screw mesh together, and the surface of the wooden component that comes into contact with the to-be-fastened component is 1 mm to 15 mm inclusive.

Abstract: A vibration plate for a musical instrument includes: a plate-shaped vibration plate main body that has a deformation anisotropy property; a first elongated reinforcing member disposed on a first face of the vibration plate main body, and that projects outwardly from the first face and extends along the first face in a direction that prevents the vibration plate main body from deforming; and a second elongated reinforcing member disposed on a second face of the vibration plate main body, and that projects outwardly from the second face and extends along the second face in the direction that prevents the vibration plate main body from deforming. As viewed from a thickness direction of the vibration plate main body, at least part of the first elongated reinforcing member overlaps with at least part of the second elongated reinforcing member.

Abstract: A reaction force generation unit includes an opposing member and a pressed body, which includes a base and domes, including a first dome, a second dome, and a third dome, bulging from the base. A leading end of each dome faces an opposing surface of the opposing member. When the pressing member presses the base, the leading ends of the domes move in a direction relatively close to the opposing member, where the domes become elastically deformed and cause an appropriate reaction force with respect to the handle. In a natural state where the pressed body is not subjected to any pressing force, axes of the domes are substantially parallel to each other, and acute angles formed by the axes and a normal line of the opposing surface are substantially similar to each other at a predetermined angle larger than zero degree.

Abstract: A keyboard includes a frame and a plurality of mass bodies. The mass bodies are arranged in parallel to each other. Each of the mass bodies is pivotally supported to pivot about a pivot fulcrum with respect to the frame. The mass bodies are at least one of a plurality of keys configured to be directly operated, a plurality of interlocking members configured to pivot in conjunction with a corresponding one of the plurality of keys, embedded members in the plurality of keys or embedded members in the plurality of interlocking members. At least some of the mass bodies include notched portions being arranged in order from a pitch, which is equal to or greater than a lowest pitch, to a highest pitch. The notched portions are different from each other in at least one of size, position, or distance from the pivot fulcrum.

Abstract: Provided is a musical instrument including a vibratable body; and a vibrator. The vibrator includes a vibrating body that vibrates in a predetermined direction; and a coupling member coupling the vibrating body and the vibratable body and that transmits vibration of the vibrating body to the vibratable body. The coupling member includes a shaft extending between the vibrating body and the vibratable body; a first wire rod coupling one end portion of the shaft and the vibrating body; and a second wire rod coupling another end portion of the shaft and the vibratable body. A resonance frequency of each of the shaft, the first wire rod, and the second wire rod is at least 10 kHz.

Abstract: A key assembly includes a capstan and a key. The key includes an upper surface, a hole part having a first inner side surface supporting the capstan, and an opening part arranged between the upper surface and the hole part, the opening part having a second inner side surface surrounding the capstan.

Abstract: A keyboard includes a frame and a plurality of mass bodies. The mass bodies are arranged in parallel to each other. Each of the mass bodies is pivotally supported to pivot about a pivot fulcrum with respect to the frame. The mass bodies are at least one of a plurality of keys configured to be directly operated, a plurality of interlocking members configured to pivot in conjunction with a corresponding one of the plurality of keys, embedded members in the plurality of keys or embedded members in the plurality of interlocking members. At least some of the mass bodies include notched portions being arranged in order from a pitch, which is equal to or greater than a lowest pitch, to a highest pitch. The notched portions are different from each other in at least one of size, position, or distance from the pivot fulcrum.

Abstract: A vibrator includes: a movable portion connected to a vibratable member; a driver configured to drive the movable portion to cause vibration of the movable portion to vibrate the vibratable member; and a driver supporter secured to a support member and configured to support the driver such that the driver is pivotable about an axis extending in a direction intersecting a movable direction of the movable portion.

Abstract: A key assembly includes a capstan and a key. The key includes an upper surface, a hole part having a first inner side surface supporting the capstan, and an opening part arranged between the upper surface and the hole part, the opening part having a second inner side surface surrounding the capstan.