Kabushiki Kaisha Kawai Gakki Seisakusho Patent applications |
Patent application number | Title | Published |
20150269922 | ELECTRONIC KEYBOARD MUSICAL INSTRUMENT - An electronic keyboard musical instrument includes a storage device, a musical tone generation unit, a resonating sound generation unit, and an adding unit. The musical tone generation unit reads out corresponding musical tone waveform data from the storage device according to key depression information to generate a musical tone waveform signal and a first register resonating sound waveform signal. The resonating sound generation unit receives the musical tone waveform signal to cause the resonating sound generation circuit to generate a second register resonating sound waveform signal according to damper pedal operator manipulation information and the key depression information, and outputs the second register resonating sound waveform signal. The adding unit is configured to add the musical tone waveform signal and the resonating sound waveform signal from the musical tone generation unit and the resonating sound generation unit respectively, and outputting a resulting signal. | 09-24-2015 |
20150128791 | ELECTRONIC KEYBOARD INSTRUMENT - When a key depression speed and a key release speed of a key is to be detected based on a value of a counter ( | 05-14-2015 |
20150068384 | HAMMER DEVICE AND KEYBOARD DEVICE FOR ELECTRONIC KEYBOARD INSTRUMENT - 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. | 03-12-2015 |
20140290464 | KEY FOR KEYBOARD INSTRUMENT - A key for a keyboard instrument, which makes it possible to easily attach a weight to a synthetic resin-made key body while securing a desired touch weight to be given during key depression, and can be manufactured at low costs. The key includes a pivotally movable key body made of a synthetic resin, extending in a front-rear direction, and having a recess open downward, and a weight made of a material whose main component has an elasticity, and attached to the key body in a state received in the recess. The recess has a locking portion formed at an opening edge portion in a manner projecting therefrom such that the locking portion allows the weight to be received into the recess while being elastically deformed when the weight is attached to the key body, and locks the received weight in a state prevented from falling out. | 10-02-2014 |
20140083277 | WHITE KEY FOR KEYBOARD INSTRUMENT - A white key for a keyboard instrument, which makes it possible to improve yield and marketability and reduce manufacturing costs. The white key for a keyboard instrument includes a wooden key body, a synthetic resin-made upper cover bonded to the key body, and a synthetic resin-made front cover bonded to a front end face of the key body. The upper cover has a protrusion protruding downward from a front end thereof, and the protrusion and an upper end of the front cover are in contact with each other via respective inclined surfaces formed on the protrusion and the upper end of the front cover. | 03-27-2014 |
20140083274 | BEARING MEMBER - A bearing member is to be used for an action mechanism in a keyboard instrument, the action mechanism provided with an action member that pivots in accordance with a key-depressing operation, and the bearing member includes: an inner layer having a through hole through which a shaft provided in the action member is inserted; and an outer layer formed in an outer side of the inner layer. The inner layer is formed of a first material having a higher stability against humidity than a stability against humidity of the outer layer. The outer layer is formed of a second material having a resilience greater than a resilience of the inner layer. | 03-27-2014 |
20130319204 | ANGLE ADJUSTER FOR MUSIC STAND AND KEYBOARD INSTRUMENT WITH ANGLE ADJUSTER - An angle adjuster for a music stand includes: a pair of thick portions having a thickness equivalent to a thickness of a two-fold hinge in a folded state and arranged to be mutually parallel; and an intermediate portion arranged between the pair of thick portions and recessed relative to upper surfaces of the thick portions perpendicular to a thickness direction thereof. The intermediate portion includes a plurality of catching portions provided mutually parallely along a longitudinal direction of the thick portions, each of the catching portions being configured to catch one end of a support bar to support the music stand. | 12-05-2013 |
20130298750 | AUTOMATIC ACCOMPANIMENT APPARATUS FOR ELECTRONIC KEYBOARD MUSICAL INSTRUMENT AND FRACTIONAL CHORD DETERMINATION APPARATUS USED IN THE SAME - The number of chords belonging to a first chord group is decreased to less than the number of chords belonging to a second chord group. In a first detection mode, when a first determining unit determines that a state of key depressed does not correspond to any chord in a first chord group, a previously selected chord is continuously determined. Accordingly, even if a chord detection is performed on a change of melody point by point, the number of chords substantially detected is decreased. This decreases the number of changes in accompaniment, thus stabilizing a playback of the accompaniment. | 11-14-2013 |
20130283998 | ELECTRONIC KEYBOARD INSTRUMENT - An electronic keyboard instrument capable of suppressing warpage of a keybed having a keyboard placed thereon and improving the appearance of the instrument by shared use of a backboard covering an instrument body and a speaker box. A piano body of an electronic piano has a keybed. A bottom board is disposed below the keybed in a manner spaced therefrom and extends further rearward than a rear end thereof. A front board is erected on a front end of the bottom board and connected to the keybed. The speaker box accommodates a speaker. A screen board is erected rearward of the front board in the speaker box on the bottom board, and connected to the keybed. A backboard is connected to the rear end of the bottom board in a manner covering the rear sides of the piano body and the speaker box. | 10-31-2013 |
20130283994 | FALLBOARD ARRANGEMENT FOR KEYBOARD INSTRUMENT - A fallboard arrangement for a keyboard instrument, including a slide-type fallboard and enabling enhancing the degree of freedom of design while ensuring good appearance and smooth opening and closing operation of the fallboard, to improve marketability. A fallboard opens and closes a performance section. Arms have respective guide grooves for guiding sliding of the fallboard in a front-rear direction. Left and right side plates are provided for left and right ends of a front portion of the fallboard, and have shield walls for shielding areas around left and right end faces of the fallboard, respectively. Left and right guide bushes protrude outward from the side plates, for engagement with the guide grooves of the respective arms. The guide bushes are guided by the guide grooves of the respective arms during sliding of the fallboard in the front-rear direction. | 10-31-2013 |
20130276619 | MUSICAL SCORE PLAYING DEVICE AND MUSICAL SCORE PLAYING PROGRAM - Preparation of playing information having correct note values is made possible even if tuplet symbols are not written in a musical score. A prescribed measure time calculating means a measure playing time calculating means a comparing means comparing the calculated prescribed measure time and the measure playing time, and a note value correcting means inferring that a tuplet is present within the measure if the prescribed measure time and the measure playing time are not matched and correcting the sound emission timings and the note value correcting means includes a measure note sequence recording means storing a note sequence, a grouping means grouping the notes within the measure according to each beat, and a tupleting process means performing a tupleting process of changing the note values of the grouped notes based on a relationship of the playing time of the grouped notes and the reference time of a single beat. | 10-24-2013 |
20130250613 | SWITCH, KEYBOARD INSTRUMENT PROVIDED WITH THE SAME, AND LIGHT EMISSION CONTROL CIRCUT - A switch according to the present invention includes: a substrate; a touch sensor; a light guide plate; a light emitting unit; and a control unit. The light guide plate has a surrounding side surface chamfered so that a light entering into the surrounding side surface of the light guide plate diffusely reflects inside the light guide plate. The light emitting unit is arranged at a position facing the surrounding side surface of the light guide plate. The light emitting unit is configured to emit the light to the surrounding side surface of the light guide plate. | 09-26-2013 |
20130180390 | KEYBOARD DEVICE FOR ELECTRONIC KEYBOARD INSTRUMENT - 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. | 07-18-2013 |
20130152769 | HAMMER DEVICE AND KEYBOARD DEVICE FOR ELECTRONIC KEYBOARD INSTRUMENT - 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. | 06-20-2013 |
20130081532 | HAMMER DEVICE FOR ELECTRONIC KEYBOARD INSTRUMENT - 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. | 04-04-2013 |
20130074684 | KEY SWITCH FOR ELECTRONIC PIANO - 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. | 03-28-2013 |
20130074683 | KEYBOARD DEVICE FOR ELECTRONIC KEYBOARD INSTRUMENT AND MOUNTING STRUCTURE OF LET-OFF IMPARTING MEMBER FOR ELECTRONIC KEYBOARD INSTRUMENT - 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. | 03-28-2013 |
20120160077 | MUSICAL SCORE RECOGNITION DEVICE AND COMPUTER-READABLE STORAGE MEDIUM - 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. | 06-28-2012 |
20100162873 | PEDAL DEVICE FOR KEYBOARD INSTRUMENT - A pedal device of a keyboard instrument which makes it possible to stably secure a required action of a pedal, facilitate assembly thereof, and reduce manufacturing costs. A pedal device for a keyboard instrument of the present invention comprises a chassis | 07-01-2010 |
20090145286 | ELECTRONIC KEYBOARD INSTRUMENT - An electronic keyboard instrument which is capable of easily carrying out an arpeggio performance rich in variety by a simple operation on a touch strip. The electronic keyboard instrument has a belt-like touch strip on which a player slides his finger while touching it to carry out an arpeggio performance. A CPU causes musical tones of respective pitch names included in respective designated component pitch names to be sounded, in a predetermined arpeggio pattern having a predetermined sounding order, according to detected touch positions on the touch strip, for the arpeggio performance. A musical tone generating circuit for generating musical tones for the arpeggio performance is switched between first and second tone generator circuits for generating musical tones based on key-on information detected on swingable keys and a third tone generator circuit dedicated to generation of musical tones for the arpeggio performance. | 06-11-2009 |
20090120265 | HAMMER SHANK OF PIANO AND METHOD OF MANUFACTURING THE SAME - There is provided a hammer shank for a piano which is capable of suppressing a change in the dimension between two arms due to dryness and wetness to thereby ensure smooth and stable operation of a hammer. A hammer shank is supported by a flange and pivotally moves in accordance with key depression. A shank body formed of wood has two bifurcated arms formed on one end thereof. These arms extend in facing and parallel relation to each other along respective opposite sides of the flange, and are pivotally supported by the flange. Phenol backers are attached on outer side surfaces of the respective two arms so as to prevent the two arms from being displaced in a direction in which they face each other. | 05-14-2009 |
20090100980 | UPRIGHT PIANO - [Problems to be solved]There is provided 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.
| 04-23-2009 |
20090019987 | KEY FOR KEYBOARD INSTRUMENT - A key for a keyboard instrument, which is capable of maintaining the excellent abrasion resistance and lubricity of bushing cloth for a long time period, thereby making it possible not only to stably ensure a smooth pivotal motion of the key but also to manufacture the key at lower costs. The key is mounted in a state engaged with a pin and is pivotally moved in accordance with depression thereof. The key has a key stick formed with a pin hole having left and right wall surfaces opposed to each other and opening downward, and is pivotally engaged with the pin via the pin hole. Bushing cloth sheets are made of fluorocarbon resin fibers, and are affixed to the left and right wall surfaces of the pin hole. | 01-22-2009 |
20090000462 | Electronic Musical Instrument - An electronic music instrument includes a musical-tone control that generates operation information of keys and a damper pedal to serve as musical-tone control information; a musical-tone generator simultaneously generating a plurality of musical tones according to the musical-tone control information; a resonance-tone generator that includes resonant circuits equal in number to harmonic signals of musical-tone signals that can be generated, for generating a resonance tone with the resonance circuits using a musical tone generated by the musical-tone generator as an input signal to each resonance circuit; and a resonance-tone mixer that multiplies the resonance tone generated by the resonance-tone generator by a predetermined degree according to the musical-tone control information, for adding the product to a musical tone input from the musical-tone generator, and outputting the sum. | 01-01-2009 |
20080295668 | ELECTRONIC KEYBOARD MUSICAL INSTRUMENT - An electronic keyboard musical instrument includes a body unit of the musical instrument and a stand attached to the body unit. The stand includes a pair of side boards disposed in a standing manner so as to interpose the body unit therebetween. The body unit includes a pair of lateral surfaces. Each of the pair of lateral surfaces faces one of the pair of side boards and includes a first engaging portion disposed thereon. Each of the pair of side boards includes a first engaged portion engaged by the first engaging portion and disposed on an inner lateral surface thereof, which faces one of the pair of lateral surfaces of the body unit. The first engaging portion and the first engaged portion are engaged with each other by at least one of the body unit and the stand being moved in a predetermined direction. | 12-04-2008 |
20080277992 | STOOL - 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. | 11-13-2008 |
20080257132 | BLACK KEY FOR KEYBOARD INSTRUMENT AND METHOD OF MANUFACTURING A BLACK KEY COVER - A black key for a keyboard instrument, in which a black key cover incorporating a weight can be manufactured at low costs, and the black key cover can be firmly mounted on a key body, in a state stably holding the weight in a black key cover body. A swingable key body extends in a front-rear direction. A black key cover body has a hollow shape opening downward, and is mounted on a front portion of the upper surface of the key body in a manner covering the front portion. A weight is received within the black key cover body. The black key cover body has at least one of lower walls protruding inward from lower portions of left and right side walls, for holding the weight from below. The lower surfaces of the lower walls are bonded to the key body. | 10-23-2008 |
20080210082 | AUTOMATIC MUSIC TRANSCRIPTION APPARATUS AND PROGRAM - An automatic music transcription apparatus that can automatically transcribe an acoustic signal produced by a single musical instrument, not only in monophonic music but also in polyphonic music, where a plurality of notes are sounded at the same time, is provided. The apparatus includes an input block for receiving an acoustic signal; an overtone-power-ratio detection block for detecting overtone-to-fundamental power ratios of an input sample acoustic signal of a musical instrument used in music to be transcribed automatically; a storage block for storing the overtone-to-fundamental power ratios; a chromatic-note-power detection block for detecting the power of each chromatic note from the acoustic signal input from the musical instrument; an overtone elimination block for subtracting, on the assumption that each chromatic note is a fundamental note, the product of the power of the fundamental note and the power ratio of each overtone corresponding to the chromatic note of the fundamental note from the power of the chromatic note of the overtone and adding the product to the power of the fundamental note, with respect to all the chromatic notes, one after another from the lowest chromatic note; a musical-notation-information detection block for detecting musical notation information by extracting a chromatic note having a power greater than or equal to a threshold level, after the overtone elimination block performs the processing; and a detection result output block for outputting the detected musical notation information to a file or the like. | 09-04-2008 |