Patent ID: 8342053

Claim:
An operating device for a manual transmission apparatus, comprising: a plurality of axially movable operation shafts supported at a housing and selectively engageable with one of a plurality of shift gear sets; a shift-and-select shaft supported at the housing, selecting one of the plurality of operation shafts by rotating in a circumferential direction of the shift-and-select shaft and moving the selected operation shaft in an axial direction of the selected operation shaft by moving in an axial direction of the shift-and-select shaft; an engagement groove extending in the circumferential direction of the shift-and-select shaft at an outer circumference of the shift-and-select shaft, the engagement groove including a first inner surface and a second inner surface; an operating portion for manually operating the shift-and-select shaft; an inertia unit possessing a first end portion at which is located a pivotably supported portion which is pivotably supported at the housing so that the inertia unit is pivotable in response to movement of the shift-and-select shaft in the axial direction of the shift-and-select shaft, the inertia unit also including a second end portion at which is located an engagement portion; the engagement portion including a projecting pin and a ring idly pivotably mounted on the projecting pin, the projecting pin and the ring being positioned in the engagement groove, and the ring being selectively contactable with the first inner surface or the second inner surface of the engagement groove; and the engagement groove being movable relative to the engagement portion along the engagement portion in response to rotation of the shift-and-select shaft in the circumferential direction, and the engagement portion being movable in a manner in which the ring engages one of the first and second inner surfaces of the engagement groove in response to axial movement of the shift-and-select shaft.