Patent ID: 8297144

Claim:
An operating device for a manual transmission apparatus, comprising: a plurality of operation shafts supported at a housing so as to move in an axial direction of the operation shafts and selectively engaging one of a plurality of shift gear sets by one of the plurality of the operation shafts being moved in the axial direction thereof; a shift-and-select shaft having an engagement groove extending in a circumferential direction thereof, supported at the housing, selecting one of the plurality of the operation shafts by rotating in the circumferential direction and moving the selected operation shaft in the axial direction thereof by moving in an axial direction of the shift-and-select shaft; an operating portion for manually operating the shift-and-select shaft; an inertia unit including an engagement pin, which is positioned within the engagement groove of the shift-and-select shaft, at an end portion of the inertia unit, pivotably supported at the housing, and pivoting in response to a movement of the shift-and-select shaft in the axial direction thereof; a swing-and-contact member swingably provided at the engagement pin of the inertia unit, swinging by being pressed by one of first and second inner surfaces of the engagement groove in accordance with the movement of the shift-and-select shaft and contacting the first and second inner surfaces of the engagement groove; wherein the swing-and-contact member swings around a center of the engagement pin as a swing center axis, the engagement pin being provided within the engagement groove so that a clearance exists between the swing-and-contact member, having a width, and the engagement groove, having a groove width larger than the width of the swing-and-contact member, the first and second inner surfaces being at positions farther from a pivot axis of the inertia unit than the swing center axis; the engagement pin being fixed to an engagement arm which is connected to an inertia mass of the inertia unit so that rotation of the engagement pin about the swing center pivots the inertia mass about the pivot axis; and the swing-and-contact member having contact surfaces parallel to and facing the first and second inner surfaces of the engagement groove of the shift-and-select shaft, respectively.