Yamaha Corporation

Akito Ohba

Shunsuke Ichiki

Hiroshi Harimoto

Ichiro Osuga

Nariyasu Yaguchi

A keyboard apparatus includes a plurality of keys each rotatable with a predetermined stroke, a support assembly which includes a support with one side rotatably arranged with a support rail and a jack with the one side rotatably supported by the support, and rotates with depression of any of the plurality of keys, a hammer unit which is operated by receiving an action of the jack, a shank rail which rotatably supports the hammer unit, and a jack stopper which makes contact with the jack which rotates with the depression of any of the plurality of keys, the jack stopper being placed on a rotation path of the jack and provided to a fixing portion which does not rotate with the depression any of the plurality of keys.

Keyboard apparatus

A keyboard apparatus includes a key, a frame, a flexible section configured to rotate the key with respect to the frame, the flexible section having a longitudinal direction, and including a region where a length of the flexible section in a first direction continuously increases toward a first end and a second end of the flexible section in a cross section perpendicular to the longitudinal direction of the flexible section, and a first supporting section supporting side closer to the first end than the region, the first supporting section including a bonding section bonded to the first end, the bonding section including a first section and a second section, the first section and the second section keeping continuity with the flexible section, and a recessed section being arranged at a position, in a scale direction and sandwiched between the first section and the second section, of the bonding section.

A support assembly according to one embodiment of the present invention is provided, the support assembly including a jack rotatably supported by a support; a repetition lever rotatably supported with respect to the support; a protrusion disposed at an intersecting portion of the jack and the repetition lever; and a protrusion receiving portion for receiving the protrusion; wherein the protrusion receiving portion defines a movable range of the protrusion and limits a rotation range of the jack.

Support assembly and keyboard apparatus

A support assembly according to one embodiment of the present invention includes a support rotatably disposed with respect to a frame, a repetition lever rotatably connected to the support, an spring element supported by a support portion fixed to the support, the spring element which provides a rotational force to the repetition lever, and a contact portion between the repetition lever and the spring element, wherein a rotating portion of the repetition lever is provided with respect to the support portion on a side opposite to the contact portion between the repetition lever and the spring element.

A support assembly includes a support rotatable with respect to a frame, a repetition lever rotatable with respect to the support, and a first extension portion disposed to the repetition lever on a jack side with respect to the center of rotation of the repetition lever, the first extension portion being in contact with a stopper from below the stopper.

A support assembly includes a support rotatable along a first surface with respect to a support rail, a repetition lever rotatable on the support, and a jack rotatable on the support and disposed to at least partially overlaps the repetition lever. The repetition lever includes a first contact portion which makes contact with a regulating portion which regulates rotation, the jack includes a second contact portion which makes contact with the regulating portion which regulates rotation, and the repetition lever and the jack are provided so that the first contact portion and the second contact portion overlap each other.

A support assembly in one embodiment of the present invention includes a support rotatable along a first surface with respect to a frame; a repetition lever rotatable with respect to the support; and an extension portion coupled to the repetition lever, the extension portion being slidable contact with a first guide portion, the first guide portion moving along the first surface.

A support assembly according to an embodiment of the present invention includes a support rotatably disposed with respect to a frame, a jack rotatably connected with respect to the support on a side opposite to a rotation center of the support, and a support heel disposed on a lower surface side of the support to make contact with a member connected to a key, wherein the support is configured of a first main body portion, a bent portion, a second main body portion, and a jack support portion from the rotation center side of the support toward a rotation center side of the jack, and the second main body portion is disposed on a side closer to the key than the first main body portion by the bent portion which couples the first main body portion and the second main body portion.

A support assembly including a support rotatably disposed with respect to a frame, a repetition lever hinge mounted to the support, and a repetition lever supported by the repetition lever hinge and rotatably disposed with respect to the support, wherein the repetition lever has a contact surface and the contact surface contacts a hammer shank roller provided to a hammer shank for rotating a hammer, and the repetition lever hinge is mounted to the support in a mounting direction that crosses with a tangent-line direction of a line tangent to the hammer shank roller at the contact between the hammer shank roller and the contact surface.

A support assembly includes a support rotatably disposed with respect to a frame; a jack support portion connected to the support; a jack having a recessed portion in a lower portion of the jack, the jack having the jack support portion inside the recessed portion and being rotatably disposed to the support; and an acting portion fixed to the jack and receiving a downward action. The recessed portion has an open end with a width larger than a width of the jack support portion. The recessed portion may have an open end with a width larger than a width of the jack support portion.

A support assembly of a keyboard apparatus activated in accordance with pressing of a key to rotate a hammer provided at one end of a hammer shank, the support assembly includes a support rotatably disposed with respect to a frame, a jack having one side rotatably connected to the support and another side including a contact surface which makes contact with a hammer shank roller provided to the hammer shank, and a rib provided to the other side of the jack and projecting to a hammer shank roller side of the contact surface.

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Hamamatsu, Japan

Akito Ohba