Abstract: A hammer device for an electronic keyboard instrument, enabling prevention of grease or the like from adhering to an actuator portion during mounting of the hammer, to thereby enable speedy hammer mounting work and improve the work efficiency. The hammer device includes a hammer support and hammers arranged side by side in a left-right direction and each pivotally supported by the hammer support to pivotally move in accordance with depression of an associated key. When mounting the hammer to the hammer support, before a shaft hole is engaged with a fulcrum shaft portion, left and right protrusions of the hammer are brought into abutment with respective left and right stopper walls provided close to the respective left and right ends of the fulcrum shaft portion, to thereby prevent the actuator portion from being brought into contact with the fulcrum shaft portion.

Abstract: A keyboard device for an electronic keyboard instrument, including several keys arranged side by side in a left-right direction, a hammer support disposed rearward of the keys, a plurality of hammers pivotally supported by the hammer support to be pivotally moved in accordance with key depression, and a key switch having a plurality of switch bodies provided in association with the respective hammers and a switch board mounted to the hammer support. The hammer support has a hammer supporting part for supporting the hammers and a switch mounting part to which the key switch is mounted, and is formed by an injection molded article of a predetermined kind of synthetic resin.

Abstract: A musical tone control system for an electronic keyboard instrument, which is capable of calculating a key depression velocity of a key with high accuracy without being adversely affected by a large rotational resistance of the key during a let-off, and stopping sounding of a musical tone in appropriate timing. The system detects first key depression information on a key at a first position corresponding to a key depression depth obtained before start of a let-off, second key depression information on the key at a second position which corresponds to a larger key depression depth than the first position does, and third key depression information, obtained after termination of the let-off, on the key at a third position which corresponds to a larger key depression depth than the second position does. The tone volume of a musical tone is set based on a key depression velocity of the key.

Abstract: A hammer device of an electronic piano with keys which swing in accordance with key depression, includes a hammer support that is made of a synthetic resin and has a fulcrum shaft, and a hammer having a shaft hole part for being fitted on the fulcrum shaft and configured to pivotally move about the fulcrum shaft in a manner interlocked with the swinging key. The fulcrum shaft has an outer peripheral surface formed by a pair of arcuately-curved surface portions opposite to each other and a pair of planar surface portions each extending between the pair of arcuately-curved surface portions and parallel to each other.

Abstract: A wood member for a musical instrument, which is capable of preventing occurrence of damage, such as cracking, to thereby ensure smooth and stable operation of the musical instrument and maintain excellent appearance of the same over a long time period. The wood member has compressive internal stress remaining at least in an outer peripheral portion thereof by being subjected to heating processing, cooling processing, and moisture conditioning processing, in advance. A wood workpiece as a workpiece for the wood member is heated at a predetermined temperature, and the heated wood workpiece is cooled. The cooled wood workpiece is subjected to moisture conditioning such that compressive internal stress is generated at least in an outer peripheral portion of the wood workpiece.

Abstract: A hammer device for an electronic keyboard instrument, enabling prevention of grease or the like from adhering to an actuator portion during mounting of the hammer, to thereby enable speedy hammer mounting work and improve the work efficiency. The hammer device includes a hammer support and hammers arranged side by side in a left-right direction and each pivotally supported by the hammer support to pivotally move in accordance with depression of an associated key. When mounting the hammer to the hammer support, before a shaft hole is engaged with a fulcrum shaft portion, left and right protrusions of the hammer are brought into abutment with respective left and right stopper walls provided close to the respective left and right ends of the fulcrum shaft portion, to thereby prevent the actuator portion from being brought into contact with the fulcrum shaft portion.

Abstract: A key switch for an electronic piano, which makes it possible to increase an allowable range for shift of a movable contact without increasing the size of the key switch of the three-contact type. The key switch includes a substrate having first to third stationary contacts arranged thereon side by side in the lengthwise direction of a pivotal member as one of a key and a hammer. Each stationary contact has a common contact and a non-common contact. The common contact has an extended portion extending between two non-common contacts. The key switch has first to third movable contacts arranged side by side on an elastic switch body, for being sequentially brought into contact with the common contacts and non-common contacts of the stationary contacts as the switch body is pressed by the pivotal member, to thereby output signals indicative of key depression information.

Abstract: A keyboard device for an electronic keyboard instrument, which enables facilitation of work for mounting and dismounting a key switch and install hammers and the key switch with high accuracy, and provision of a touch feeling similar to one provided by an acoustic grand piano while keeping the device compact in depth. The device comprises swingable keys, a hammer support formed by a synthetic resin molded article, hammers pivotally supported by the hammer support, and a key switch including switch bodies provided in association with the hammers and a switch board. The hammer support has a switch mounting part formed with an opening vertically extending therethrough. The key switch is removably mounted to the switch mounting part, with the switch bodies facing the hammers from above via the opening and the switch board placed on the upper surface of the switch mounting part.

Abstract: A piano with an electronic tone generator capable of outputting musical sound signals of a reverberation and/or a resonance, in accordance with whether an external output is performed or not.

Abstract: A resonance generation device of an electronic musical instrument, including: a key depression state detecting means detecting whether a key which is in a specific relation with a played key is already depressed or not when a key playing operation is performed; a specific relation detecting means detecting the relation between the played key and the depressed key when the key depression state detecting means detects that the key in the specific relation with the played key is already depressed; and a musical sound generation means sound generating a musical sound of the played key when the specific relation detecting means detects that the played key and the depressed key are in the specific relation set in advance, and generating a predetermined musical sound based on the relation between the played key and the depressed key so that a position of the depressed key is to be a sound generation source.

Abstract: There are provided an image acquisition unit acquiring an image containing information of a paper-based musical score from an image reading-out unit, and a musical character recognition unit recognizing a musical character contained in the image acquired by the image acquisition unit by using a plurality of musical character recognition methods, and outputting a plurality of musical character recognition results.

Abstract: A keyboard device for an electronic keyboard instrument, ensuring stable pivotal motion of each key and improved in each of assembly and disassembly. Each key extends in a front-rear direction and has a pivot shaft extending at a rear end in a left-right direction. A keyboard chassis has a mounting portion and key-separating support portions each for supporting the pivot shaft. A pivot shaft bearing member has a pivot shaft support portion cooperating with each key-separating support portion to form a bearing for the pivot shaft, supporting each key pivotally movable, and is removably mounted to the mounting portion. During assembly, with each key engaged with the key-separating support portion via the pivot shaft and held on the keyboard chassis, the mounting portion remains exposed, enabling the bearing member to be mounted from above or rear.

Abstract: A keyboard device for an electronic keyboard instrument, which has a simple construction and can be manufactured at relatively low costs, and is capable of providing let-off feeling closely analogous to the let-off feeling of an acoustic piano. The keyboard device comprises keys, hammers each of which has an engaging part and pivotally moves in accordance with pivotal motion of an associated key, an unmovable holder, and let-off members each formed of an elastic material, for temporary engagement with the engaging part of an associated hammer during each of key depression and key release, to impart let-off feeling to touch feeling of an associated key during key depression. Each let-off member extends from the holder to a pivotal path along which the associated hammer performs pivotal motion, and is compressed during key depression and deflected during key release by engagement with the engaging part.

Abstract: A hammer for an electronic keyboard instrument, constructed to ensure secure mounting of a weight to a hammer body and enable both assembly and disassembly of the hammer to be easily performed. The hammer includes a hammer body having a weight mounting portion that is open on one side in a left-right direction and a weight removably mounted to the hammer body via a mounting portion. The weight mounting portion has a housing portion that has an opening having a shape complementary to the mounting portion, and houses the mounting portion in a manner slidable between a fit-in position and a fixed position, latching portions for latching the mounting portion incapable of falling off from the opening when in the fixed position, and holding portions for holding the mounting portion non-slidable to the fit-in position.

Abstract: The ROM 101 stores a chord scale note table composed of a plurality of scale by 12 notes starting from a chord tone in which C note is given as a root note and arranging a chord scale note as an inverted form of a chord in which the note is given as the lowest note. Where there is any change in chord at a beginning note of a phrase, or while phrase is played, notes are replaced to suppress note jump by using the chord scale note table. Where time from the previous key-on to the current key-on is in excess of a predetermined time, the note jump will not be suppressed.

Abstract: A musical tone control system for a grand-type piano, which not only enables a shutter to be mounted on a hammer without any inconvenience even when a space above the hammer is small, but also is capable of properly controlling musical tones to be sounded. In this system, first to third optical sensors are disposed along the length of a hammer shank. Depression or non-depress of a key and a pivoting direction of an associated hammer are determined based on signals from the first and second optical sensors, respectively. Further, the pivoting speed of the hammer is calculated based on a signal from the third optical sensor. A musical tone to be sounded is controlled based on the determined depression or non-depression of the key and pivoting direction and the calculated speed of the hammer.

Abstract: There is provided a touch detecting device of a keyboard instrument, which makes it possible not only to enhance the mounting density of a plurality of optical sensors, but also to detect touch information of a key with high accuracy without being affected by light from the other optical sensors.

Abstract: A stool includes a seat board, a plurality of legs, and a connecting board. The plurality of legs is attached to the seat board so as to protrude from the seat board in a downward direction, and to support the seat board such that the seat board is horizontally held. The connecting board is disposed such that one surface thereof faces a bottom surface of the seat board. The connecting board is surrounded by and secured to the plurality of legs.

Abstract: An electronic musical sound generator prevents a sound production sequence to be stopped from continuing to be produced even through the key is released. Even if an erroneous instruction is sent to prevent identification data from being compared, in other words, if a sound production sequence which should be stopped, continues to be produced because of failure to find the sound production sequence to be stopped, the production of the musical sound can be stopped due to the key release because a second decision block searches data in a storage block, regards a key having identification data different from the one sent as the released key, according to the sequence being produced and the key is number, and determines the sound production sequence to be stopped.

Abstract: An upright piano which is capable of providing a soft pedal effect in a first playing mode for performing acoustic playing, and an excellent performance in a second playing mode, without being affected by step-on of a soft pedal, while properly detecting the rotational position of each hammer, is disclosed. The upright piano includes sensors for detecting the rotational position of a hammer in the second playing mode, a hammer rest rail with which the hammer is in contact in a key-off state of a key, a soft pedal, a pedal rod for pushing up the hammer rest rail as the soft pedal is stepped on, a stopper movable between a permitting position and a blocking position, and a stopper drive mechanism for driving the stopper to the permitting position in the first playing mode and to the blocking position in the second playing mode.