Strainer device

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.