Patent ID: 6418816
Filing Date: 2002-07-16
Classification: F16H,G03B,Y10T

Abstract:
A power transmission device, comprising:a motor; a driven member having an internal gear part; a first internal gear which is smaller in diameter than the internal gear part of said driven member, said first internal gear being engaged with an output gear of said motor; another gear, wherein said first internal gear and said another gear transmit a rotational force of said motor to the internal gear part of said driven member, and wherein said first internal gear is disposed inside the internal gear part of said driven member as viewed in a direction of an axis of said first internal gear, and at least a part of said first internal gear is disposed in such a way as to be located inside the internal gear part of said driven member as viewed in a direction perpendicular to the direction of the axis of said first internal gear and; wherein said first internal gear has an external gear, and wherein the external gear of said first internal gear is engaged with said another gear, and said another gear is engaged with the internal gear part of said driven member.