Operation input device

An operation input device comprising:

• an input member to which a rotational operation force is input;
• a linearly moving member disposed on a reference axis;
• a linear motion conversion mechanism that mutually converts rotational motion of the input member and linear motion of the linearly moving member along the reference axis;
• a reaction force generating mechanism that generates a reaction force against the rotational operation force input to the input member and causes the reaction force to act on the linearly moving member;
• and
• a support member that supports the input member, the linearly moving member, and the linear motion conversion mechanism, wherein
• defining a direction along the reference axis as an axial direction, a direction orthogonal to the reference axis as a radial direction, and a direction around the reference axis as a circumferential direction,
• the support member includes a support tubular portion formed in a tubular shape and disposed on the reference axis,
• the linearly moving member is disposed inward in the radial direction of the support tubular portion,
• the linear motion conversion mechanism includes:
• a tubular rotating member that is disposed outward in the radial direction of the support tubular portion on the reference axis and rotates in conjunction with rotation of the input member;
• a cam groove formed in the rotating member so as to extend along a direction inclined with respect to both the axial direction and the circumferential direction;
• a driven member that moves along the cam groove;
• and
• a connecting member that connects the driven member and the linearly moving member in the radial direction,
• a long hole-shaped guide groove that penetrates the support tubular portion in the radial direction and extends along the axial direction is formed in the support tubular portion, and
• the connecting member is fixed to one end portion in the axial direction of the linearly moving member in a state of penetrating the guide groove in the radial direction so that the rotation in the circumferential direction is restricted by an inner surface of the guide groove.