JPH0264992U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing the main parts of a keyboard device of an electronic keyboard instrument according to an embodiment of the invention, FIG. 2 is a sectional view taken along line C-C in FIG. 1, and FIGS. The figure is a longitudinal sectional side view for explaining the operation of this keyboard device, and FIGS. 6 to 10 are longitudinal sectional side views of essential parts showing other embodiments of this invention. 1... Keyboard chassis, 2... Key, 22... Slide member, 23... Leaf spring (transmission member), 32...
...Action arm, 45 ... Weight, 46, 53
, 57... tension coil spring, 51, 54, 55...
...Compression coil spring, 56...stopper.

Claims (1)

[Claims for Utility Model Registration] (1) A keyboard chassis, a key provided on the keyboard chassis so as to be freely rotatable in the vertical direction, and a slide member provided slidably below the key on the keyboard chassis. a transmission member that linearly moves and transmits the key press displacement of the key to the slide member; a seesaw-shaped action arm provided on the slide member so as to be vertically rotatable; and the action arm. is normally positioned at a predetermined initial position, and when the action arm rotates in a predetermined direction from the initial position, a load applying means applies a load to the action arm corresponding to the amount of rotation; and a lower surface of the key. an arm pressing protrusion that is vertically disposed on and presses one end of the action arm, and when the key is pressed and reaches a first lowered position, the arm pressing protrusion presses the one end of the action arm. When the key is pressed further, the action arm whose one end is pressed by the arm pressing protrusion rotates in a predetermined direction from the initial position, and the load applying means causes the action arm to rotate in a predetermined direction. A load corresponding to the amount of rotation is applied to the action arm, and when the key is further pressed and reaches the second lowered position, the pressing displacement of the key is transmitted via the transmission member and a predetermined value is applied. The slide member sliding in the direction reaches a predetermined slide position, and accordingly, one end of the action arm separates from the arm pressing protrusion, and the action arm returns to its original initial position by the action of the load applying means. Return to , A keyboard device for an electronic keyboard instrument characterized by being configured as follows. (2) The keyboard device for an electronic keyboard instrument according to claim 1, wherein the transmission member is made of a leaf spring. (3) The load applying means includes a weight provided at the other end of the action arm, and a weight of the weight to normally position the action arm at a predetermined initial position against the weight of the weight. 3. The keyboard device for an electronic keyboard instrument according to claim 1, further comprising a coil spring having a spring force in balance with the coil spring. (4) The load applying means includes a first coil spring that biases the action arm in one direction, and a first coil spring that biases the action arm in the other direction and normally biases the action arm in a predetermined direction. 3. The keyboard device for an electronic keyboard instrument according to claim 1, further comprising a second coil spring having a spring force that balances the spring force of the first coil spring to position the keyboard device at the initial position. (5) The load applying means includes a coil spring that biases the action arm in a direction opposite to the direction in which it rotates when a key is pressed, and a coil spring that normally biases the action arm against the spring force of the coil spring. 1. A keyboard device for an electronic keyboard instrument, comprising: a stopper that locks at a predetermined initial position.