Importance

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Abstract

A transmission includes a first shaft rotatable in a circumferential direction about a central axis extending in one direction, a second shaft rotatable in the circumferential direction and in series with the first shaft in an axial direction in which the central axis extends, an internal gear including an internal tooth portion, a housing that houses the internal gear therein, an annular external gear connected to the second shaft and including an external tooth portion that partially meshes with the internal tooth portion, a cam that is rotatable together with the first shaft and includes a connection hole that houses an end portion of the first shaft on a first side in the axial direction, and a bearing between an inner circumferential surface of the external gear and an outer circumferential surface of the cam. The connection hole includes a bottom surface at an end on the first side in the axial direction, and is open at an end on a second side in the axial direction.

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First Claim