Abstract: A keyboard device for an electronic musical instrument includes a frame, a plurality of keys, a plurality of biasing members, a plurality of weight members, and a position-adjusting unit. The keys are mounted to the frame. Each of the keys has a front operating portion and a rear weight-mounting portion, and is tiltable from a normal rest position to a lower stop position in response to a stroking action at the front operating portion. The biasing members bias the keys toward the normal rest position. The weight members are mounted on the rear weight-mounting portions of the keys, and are movable relative to the front operating portions of the keys. The position-adjusting unit is operable so as to adjust concurrently positions of the weight members relative to the front operating portions of the keys.

Abstract: A keyboard device for an electronic musical instrument includes a frame, a key mounted to the frame, and a circuit board. The key has a front operating portion and a rear actuating portion, and is tiltable from a normal rest position to a lower stop position in response to a stroking action at the front operating portion. The rear actuating portion has a topside that is provided with an actuator. The circuit board is mounted to the frame, is disposed above the rear actuating portion of the key, and has a lower surface provided with a contact. The actuator actuates the contact when the key is tilted to the lower stop position.

Abstract: A collapsible keyboard includes a middle subframe, and right and left subframes respectively disposed at and connected to two sides of the middle subframe by two levers, each of which is pivotally mounted on each pair of the adjacent subframes. Thus, the right and left subframes are swingable relative to the middle subframe between a deployed position, where the subframes are aligned with each other in a row, and a collapsed position, where the left and right subframes are superimposed upon and abut against the middle subframe.

Abstract: A foldable keyboard includes a keyboard body and a linkage unit. The keyboard body includes a central section and left and right sections respectively disposed at left and right sides of the central section. The linkage unit includes two opposing pairs of first parallel linkages that are respectively pivoted to front and rear sides of the left and central sections, and two opposing pairs of second parallel linkages that are respectively pivoted to the front and rear sides of the right and central sections so as to permit folding of the keyboard body.

Abstract: A keyboard assembly is to be connected to a keyboard port of a host computer and includes a keyboard housing having opposite first and second horizontal faces and opposite vertical side walls at opposite longitudinal ends of the horizontal faces. An array of organ keys is disposed resiliently on the first horizontal face. An organ circuit array is disposed in the keyboard housing and is associated operably with the organ keys. An array of computer keys is disposed resiliently on the second horizontal face. A computer circuit array is disposed in the keyboard housing and is associated operably with the computer keys. A pair of upright support panels is mounted respectively on the side walls of the keyboard housing. Each of the support panels has two opposed distal ends which project respectively past the organ keys and the computer keys. A processor unit is connected electrically to the organ circuit array and the computer circuit array and is to be connected to the keyboard port of the host computer.