Switch device and assembly method

1. A switch device comprising:

an operation knob on which a sliding operation can be performed in a horizontal direction;

a holder member configured to hold the operation knob and move in the horizontal direction integrally with the operation knob;

a drive member configured to tilt as the holder member moves in the horizontal direction;

a switch that is pressed down by the drive member as the drive member tilts; and

a support member configured to support the holder member such that the holder member can move in the horizontal direction,

wherein the holder member has a base that is provided at a center of the holder member in the horizontal direction and a flange that extends outward from the base in the horizontal direction, and

wherein the support member has an upper wall that restricts a movement of the holder member in a vertical direction by contacting an upper surface of the flange, and a slit that is provided between the upper wall and a middle wall lower than the upper wall and that has a fixed vertical width.

2. The switch device as claimed in claim 1 ,

wherein the support member has a recess where the holder member can be mounted from above, an upper surface of the middle wall being an inner bottom surface of the recess, and

wherein the upper wall and the slit are provided at positions corresponding to where the flange is located when the holder member mounted in the recess is rotated by a predetermined angle.

3. The switch device as claimed in claim 2 , wherein the upper wall has an upper side contact surface that is provided at a position where the upper wall projects downward from a lower surface of the upper wall and that is in contact with the upper surface of the flange.

4. The switch device as claimed in claim 2 ,

wherein the holder member has a sliding contact surface formed, on a lower surface side, to continue from a lower surface of the flange, and

wherein the middle wall has a lower side contact surface that is provided at a position where the middle wall projects from the upper surface of the middle wall upward and that is in contact with the sliding contact surface.

5. The switch device as claimed in claim 2 ,

wherein the flange is a first flange and the slit is a first slit,

wherein the switch device further includes a second flange and a second slit,

wherein the first slit is provided at a first position corresponding to where the first flange is provided and the second slit is provided at a second position corresponding to where the second flange is provided when the holder member mounted in the recess is rotated by a predetermined angle.

6. The switch device as claimed in claim 2 ,

wherein the flange is a first flange and the slit is a first slit,

wherein the switch device further includes a second flange, a third flange, and a fourth flange,

wherein the first flange, the second flange, the third flange, and the fourth flange respectively extend in four directions from the base in a horizontal plane,

wherein the switch device further includes a second slit, a third slit, and a fourth slit,

wherein the first slit is provided at a first position corresponding to where the first flange is provided, the second slit is provided at a second position corresponding to where the second flange is provided, the third slit is provided at a third position corresponding to where the third flange is provided, and the fourth slit is provided at a fourth position corresponding to where the fourth flange is provided when the holder member mounted in the recess is rotated by a predetermined angle.

7. The switch device as claimed in claim 2 ,

wherein the operation knob has a rotation restricting section that restricts a rotation of the holder member in a state in which the holder member is rotated by the predetermined angle and the flange is inserted into the slit.

8. The switch device as claimed in claim 1 , wherein the flange is inserted into the slit, so that the movement of the holder member in the vertical direction is restricted while the holder member can move in the horizontal direction.

9. A method of assembling the switch device as claimed in claim 1 , the method comprising:

accommodating the drive member in the support member from a lower side of the support member;

mounting the holder member on the support member from an upper side of the support member, and combining the holder member to the drive member with the support member being interposed between the holder member and the drive member; and

inserting the flange of the holder member into the slit of the support member by rotating the holder member mounted in the support member by a predetermined angle.