Patent ID: 11929050
Assignee: YAMAHA CORPORATION
Field: Other consumer goods (Other fields)
Classification: CPC G | IPC G

Claim 12:
13. A strainer device for a drum, the strainer device comprising:
a fixing portion attachable to a shell of the drum;
an operation portion configured to be rotatable with respect to the fixing portion;
a movable portion configured to be moved with respect to the fixing portion in accordance with a rotation in a one direction of the operation portion to change a snare wire between an ON state where the snare wire is in contact with a drum head of the drum and an OFF state where the snare wire is separated from the drum head;
a cam portion including a cam surface provided on one of the movable portion or the operation portion;
a follower provided on the other of the movable portion or the operation portion, and configured to move along the cam surface; and
a pressing member configured to press the follower against the cam surface,
wherein the cam surface includes:
a first region that generates a first component of power in a direction opposite to the one direction, the first component of power being added to a counterforce of a first pressed power on the first region of the cam surface received from the follower; and
a second region that generates a second component of power in the one direction, the second component of power being added to a counterforce of a second pressed power on the second region of the cam surface received from the follower.