Key-pad operating mechanism of saxophone
AssigneeNonaka Boeki Co., Ltd.
InventorHideki Nonaka
Life of this patent
Estimating the term…
Abstract
A key-pad operating mechanism of the saxophone for forcibly separating a normally closed key-pad from the tone hole seat via an arm using the leverage principle by pressing the operating lever for the normally closed key-pad even if the normally closed key-pad is stuck to the tone hole seat. The mechanism can easily open the normally closed key-pad without affecting any traditional maneuverability of the instrument and prevents key-pads from becoming inoperable during a play.
Claims8
A key-pad operating mechanism for an instrument with a plurality of tone holes, including normally closed and normally open key-pads provided on the tone holes, and operating levers that allow a player to selectively open or close desired tone holes by pressing the key-pads, the mechanism comprising:
- an actuating lever that moves up and down by operating the operating lever for the normally closed key-pad;
- an actuating lever that is provided adjacent to the normally closed key-pad and that moves up and down by operating said operating lever for the normally open key-pads;
- and
- an arm having an abutting point that abuts said actuating lever of the normally open key-pads, said arm including a driven point that moves up and down by operating said actuating lever for the normally closed key-pad, and a connecting part that is connected to the normally closed key-pad and positioned between the abutting point and the driven point,
- wherein said arm opens the normally closed key-pad that closes the tone hole using the abutting point as a fulcrum when the operating lever for the normally closed key-pad is pressed.
A key-pad operating mechanism for an instrument with a plurality of tone holes, said instrument including normally closed and normally open key-pads provided on said tone holes, and operating levers that allow a player to selectively open or close desired tone holes by pressing the key-pads, the mechanism comprising:
- an actuating lever that moves up and down by operating the operating lever for the normally closed key-pad;
- an actuating lever that is provided adjacent to the normally closed key-pad and which moves up and down by operating said operating lever for the normally open key-pads;
- and,
- an arm having a driven point that moves up and down by operating said actuating lever for the normally closed key-pad, a connecting part that is connected to said normally closed key-pad so as to pivot freely, and an abutting point that abuts said actuating lever of said normally open key-pads,
- wherein said driven point, said connecting part and said abutting point respectively corresponding to a power point, a first fulcrum and a second fulcrum, and wherein the distance from the power point to the second fulcrum is larger than the distance from the power point to said first fulcrum.
Dependencies are inferred from the claim text.