Input device having magnetic sensor
An input device includes a fixing member, a rotatable movable member supported by the fixing member rotatably about a first direction as a center of rotation, an annular magnetic member comprising a body, a first extended portion, and a second extended portion, and having a divided space formed between the first extended portion and the second extended portion facing along a second direction orthogonal to the first direction, the annular magnetic member being configured to generate a magnetic field, and a magnetic sensor attached to the fixing member and being attached to the rotatable movable member, the magnetic sensor being configured to detect the direction of a magnetic field to detect a rotation of the rotatable movable member, in which the body extends in a third direction orthogonal to the first direction and the second direction.
1 . An input device comprising:
a fixing member;
a rotatable movable member supported by the fixing member rotatably about a first direction as a center of rotation;
an annular magnetic member attached to the rotatable movable member, the annular magnetic member including:
a body;
a first extended portion extended from one end of the body;
a second extended portion extended from the other end of the body, wherein a divided space is formed between a first tip portion of the first extended portion and a second tip portion of the second extended portion facing along a second direction orthogonal to the first direction, and the annular magnetic member is configured to generate a magnetic field going from the first extended portion toward the second extended portion;
a permanent magnet;
a first yoke having the first tip portion and a first base portion connected to one pole of the permanent magnet; and
a second yoke having the second tip portion and a second base portion connected to the other pole of the permanent magnet; and
a magnetic sensor attached to the fixing member, the magnetic sensor being configured to detect a direction of the magnetic field emitted from one of the first extended portion and the second extended portion toward the other of the first extended portion and the second extended portion to detect the rotation of the rotatable movable member,
wherein the body extends in a third direction orthogonal to the first direction and the second direction,
the first yoke has a first middle portion extending along a surface parallel to the second direction and the third direction and a first bent piece bent from the first middle portion along the first direction,
the second yoke has a second middle portion extending along the surface parallel to the second direction and the third direction and a second bent piece bent from the second middle portion along the first direction, and
the one pole of the permanent magnet is connected to the first bent piece and the other pole is connected to the second bent piece.
2 . The input device according to claim 1 , further comprising:
a control stick supported by the fixing member together with the rotatable movable member rotatably about the first direction as the center of rotation, wherein
the annular magnetic member is disposed at a position away from the control stick in the first direction,
the first bent piece is bent from the first middle portion along the first direction toward the control stick,
the second bent piece is bent from the second middle portion along the first direction toward the control stick, and
the first bent piece and the second bent piece are disposed at positions closer to the control stick than the first middle portion and the second middle portion.
3 . The input device according to claim 1 , wherein
the rotatable movable member includes a rotary shaft member and a rotating disk configured to rotate in conjunction with the rotary shaft member,
the fixing member includes:
a housing rotatably supporting the rotary shaft member; and
a sensing block attached to the housing and rotatably supporting the rotating disk, and the magnetic sensor is attached to the sensing block, and
the rotating disk is a cylindrical component to which the annular magnetic member is attached and rotatably inserted into a cylindrical recessed portion formed in the sensing block.