| Patent application number | Description | Published |
|---|
| 20080210079 | KEY STRUCTURE AND KEYBOARD APPARATUS - A key structure which is capable of giving a woody appearance to the key, and increasing the freedom of mounting at least one functional part formed as a separate part from the key structure, while maintaining excellent machinability. An upper plate has an increased width part corresponding to an end of a white key toward a player. In the key structure, a wood part is secured to the lower surface of at least the increased width part of the upper plate, and has an increased width part having substantially the same width as the increased width part of the upper plate. The key structure is mountable in a keyboard apparatus, for functioning as a white key pivotally moved by key-depressing operation. A recess is formed in a part of the wood part including the increased width part, which opens downward and has a width (W | 09-04-2008 |
| 20080236362 | Keyboard Apparatus for Electronic Musical Instrument - A keyboard apparatus for an electronic musical instrument, in which hammers each have increased rigidity without being excessively increased in the mass thereof. The hammers are provided to respectively correspond to keys, and each comprised of a resin hammer base and a metal pipe member which has a circular outer cross-sectional shape and has a fixed end thereof formed at its tip with a flat modified cross-sectional portion which closes an opening at the tip of the fixed end. When the hammer base is injection molded, the fixed end of the pipe member is fixed to a pipe-fixing portion of the hammer base by means of outsert molding. The modified cross-sectional portion of the fixed end achieves a whirl-stop function relative to the pipe-fixing portion. | 10-02-2008 |
| 20080295671 | Electronic Musical Instrument Keyboard Apparatus - Mass body unit includes a base section, an elongated member, and a mass concentrating section. The elongated member is formed by a thin sheet metal plate being bent, along its length, into a hollow cross-sectional shape such that an opening portion is defined between left and right longitudinal edges. In a section of the elongated member near a rear end of the member, the left and right longitudinal edges extend in parallel to define an outer wall portion of a U cross-sectional shape. In a section of the elongated member near a boundary position adjacent to the rear end of the member, the opening portion between the left and right longitudinal edges gradually decreases in width. Further, in a section from the boundary position to a front end, the elongated member has a hollow circular cross-sectional shape with the opening portion closed. | 12-04-2008 |
| 20090007756 | Electronic Musical Instrument Keyboard Apparatus - Keyboard apparatus includes: a plurality of white and black keys: a plurality of mass body units each pivotable in response to operation of a corresponding one of the keys; a frame having mounted thereon the plurality of keys and mass body units; and upper- and lower-limit stoppers provided on the frame for limiting a pivotable range of each of the mass body units by the mass body unit colliding against the stoppers. Each of the mass body units includes a cavity portion provided in a section thereof that pivots against a gravitational force as the corresponding key is depressed, and a plurality of particles are accommodated in the cavity portion with some vacant space left in the cavity portion. | 01-08-2009 |
| 20090078107 | Keyboard Apparatus of Electronic Musical Instrument | 03-26-2009 |
| 20090205478 | Key and Keyboard Apparatus - A key having a key-depression surface with a woody characteristic and durability without the need of a surface treatment and capable of being formed from a simple-shaped uncompressed wood. A key for use as a black key includes a resin part and a compressed wood part secured at its lower surface to an upper surface of the resin part. The compressed wood part is used to constitute a portion of a key top including an upper surface and positioned above an upper surface of white keys which are in a non-key-depression state. The compressed wood part is obtained by compression molding of unprocessed wood. The compressed density in the vertical direction in the compressed wood part is higher toward rearward from a front end of the compressed wood part. | 08-20-2009 |
| 20100071534 | Keyboard Apparatus - A keyboard apparatus configured that heavy loads to support keys and hammers are perpendicularly applied to front-side and rear-side contact portions and the area of a front part of a frame as seen from side can be reduced, thereby suppressing an amount of use of resin. The keyboard apparatus includes a frame integrally formed by resin and mounted with a stopper mounting portion to which an initial stopper is mounted. The frame is supported on a keybed only by front-side and rear-side supporting portions respectively contacting the keybed at locations beneath hammer pivot shafts and beneath key supports. In a longitudinal region between the stopper mounting portion and the front-side supporting portion, the height position of a lowermost part of the frame become higher at a position closer to the stopper mounting portion. | 03-25-2010 |
| 20110100196 | KEY AND KEYBOARD APPARATUS - A key having a key-depression surface with a woody characteristic and durability without the need of a surface treatment and capable of being formed from a simple-shaped uncompressed wood. A key for use as a black key includes a resin part and a compressed wood part secured at its lower surface to an upper surface of the resin part. The compressed wood part is used to constitute a portion of a key top including an upper surface and positioned above an upper surface of white keys which are in a non-key-depression state. The compressed wood part is obtained by compression molding of unprocessed wood. The compressed density in the vertical direction in the compressed wood part is higher toward rearward from a front end of the compressed wood part. | 05-05-2011 |
