Abstract: A key structure which is free from separation between a wood part thereof and a key base body to which the wood part is secured and has enhanced vertical rigidity in the vicinity of a clearance between the base end of the key base body and the wood part. In the key structure, the key base body has an extended part formed integrally with the base end and extended forward therefrom. The wood part is fixedly bonded to the upper surface of the extended part. A clearance is formed transversely of the key base body between the wood part and the base end. An upper plate body is fixedly bonded to both the upper surface of the wood part and the upper surface of the base end, and the rear part of the upper plate body extends in a manner spanning the base end and the wood part above the clearance.

Abstract: There is provided a keyboard apparatus which has a high durability, portability, and operability, and facilitates adaptation to a wide range of musical scenes and to multi-model production. Each adjacent pair of four main cases are pivotally connected to each other via connecting portions, whereby the main cases are allowed to assume a folded position which enables the keyboard apparatus to be carried with ease, and a flat unfolded position in which the keyboard can be played. Each main case has a keyboard unit arranged therein. Three main cases for lower tone ranges each have four white keys arranged therein, and a main case for a highest tone range has three white keys arranged therein, and a total of 25 keys are arranged on the keyboard apparatus. The main case for the highest tone range also has a group of operating elements arranged therein.

Abstract: A clamp is supported on the side of a drum for mounting the drum on a support rod. The clamp is mounted so as to avoid concentration of the load on a single part of the drum body. The clamp is cushioned at opposite vertical ends of the clamp where it is attached to the drum body to minimize the transmission of vibration of the drum to the support rod.

Abstract: In construction of a keyboard unit accommodable upright piano, a vertically turnable keyboard is held by a holder unit so that the keyboard unit can be stably held in a horizontal position at one state of the holder unit and easily be accommodated in the main casing at the other state of the holder unit.

Abstract: In construction of a piano plate for an upright piano, connectors partly embedded in one body therewith serve for direct mounting of the keyboard assembly, the side boards and the action assemblies so that three closely related elements of the upright piano, i.e. the action and keyboard assemblies and the strings, should collectively relate in construction to the piano plate for their easy and accurate relative setting and adjustment in position. Undesirable influence by warp of the conventionally used back posts and hard and troublesome mechanical work in production are both totally removed.

Abstract: In the construction of a housing for upright pianos, as a substitute for the conventional hard, thick and heavy wooden boards associated with back posts vulnerable to circumstantial changes, soft, thin and light wooden boards are attached to a metallic skelton of a substantially rectangular construction suited for supporting a keyboard assembly. Weight of the housing is greatly reduced without impairing strength and no use of back posts makes the housing well durable against changes in environmental factors.

Abstract: A portable keyboard-type musical instrument includes detachable end support frames which can be attached to the musical instrument in either an extended supporting position or a retracted storage position, a support for the keyboard of the instrument being rigidly supported by members which are in turn rigidly attached to the frame of the musical instrument.

Abstract: A support device for supporting first and second units has an instrument platform having first and second spaced opposite parallel planar surfaces. The instrument platform is rotatably supported for rotation about an axis of rotation. A first joining subassembly pivotally mounts the first unit on the first surface of the instrument platform for rotation about an axis spaced from and parallel to the axis of rotation. A first pair of locking devices lock the first unit in abutting relation to the first surface in locked position and release the first unit to hang freely at various angles with the first surface in unlocked position whereby the first unit is in playing position when the instrument platform is horizontal with the first surface up and in stored position, hanging from the first surface, when the instrument platform is horizontal with the first surface down.

Abstract: A portable folding piano is disclosed which incorporates in the preferred and illustrated embodiment, a keyboard and associated keys which disengage from the hammer pickup fingers. The keyboard is pivotally attached to the piano body and may be swung to a stored position for transportation purposes. A positioning rail aligns the hammer pickup fingers for reengagement with the piano keys which are provided with a forked extension to enable repeated and accurate engagement.