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A muffler member is coated with oil and serves the dual function of sealing in keyboard noise while sealing out and collecting dust in the keyboard environment.
English (United States)
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100% of the total text.
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Keyboard Acoustical And Contamination Prevention Device
A muffler member is coated with oil and serves the dual function of sealing in
keyboard noise while sealing out and collecting dust in the keyboard
A keyboard assembly 11 includes a unit frame 13 having plural chimneys 15
formed integrally therewith. Keybuttons 17 fit into the chimneys 15, depression
of a keybutton 17 causing spring 19 to buckle effecting movement of plate 21
relative to capacitive sensing card 23. Muffler 25 fits over frame 13, sealing in
noise of plate 21 striking frame 13. Additionally, muffler 25 is impregnated with
oil to collect and trap dust located adjacent chimneys 15 thereby preventing the
dust from entering chimneys 15 upon downward depression of keybuttons 17
which create air currents adjacent to the chimney 15.
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