Transmission mechanism
AssigneeSankyo Seisakusho Co.
InventorsTakeshi Saito, Naoyuki Takahashi
Life of this patent
Estimating the term…
Abstract
The present invention provides a transmission mechanism which is suited to miniaturization and can reduce motion transmission errors. This transmission mechanism includes: a cam; a plurality of pins arrayed along a side surface of the cam; guide plates provided with a plurality of guide holes; and a pair of gears disposed so as to sandwich the cam. Each pin contacts only one of the pair of gears, and is guided to the corresponding guide hole in conjunction with the rotation of the cam and moves along the cam and the corresponding gear, thereby causing the guide plates or the pair of gears to rotate with respect to the cam.
Claims10
A transmission mechanism comprising:
- a first shaft rotatable about a first rotational axis, the first shaft comprising a cam concentric with the first shaft and fixed to the first shaft, the side surface of the cam having a positive curvature when viewed from the first rotational axis;
- a plurality of pins arranged along the side surface of the cam;
- a second shaft rotatable about a second rotational axis;
- a guide plate concentric with the second shaft, a plurality of guide holes being provided in the guide plate along a rotational direction of the second shaft, each pin being accommodated in a corresponding guide hole;
- and
- a pair of gears concentric with the second shaft, the pair of gears being arranged so as to sandwich the cam;
- wherein
- each pin comes into contact with only any one of the pair of gears;
- and
- in conjunction with rotation of one of the first shaft and the second shaft, each pin is guided by the corresponding guide hole so as to move along the cam and a corresponding gear, thereby causing the other of the first shaft and the second shaft to rotate relative to the one of the first shaft and the second shaft.
Dependencies are inferred from the claim text.