Presser foot vertical drive device and sewing machine including the same
AssigneeJanome Corporation
InventorsTakeshi Oie, Mizuki Okada, Yukitaka Omata
Life of this patent
Estimating the term…
Abstract
A presser foot vertical drive device includes an upper shaft configured to vertically drive a needle, a presser foot drive cam fixed to the upper shaft, a presser foot urged downward over a needle plate, a cam follower configured to be vertically driven in contact with the presser foot drive cam, and a link configured to transmit the vertical drive of the cam follower to the presser foot. The presser foot drive cam includes a plurality of drive cams having cam surfaces for different presser foot vertical drive patterns. The cam follower includes a switching unit for selection of one drive cam from the presser foot drive cam.
Claims18
A presser foot vertical drive device comprising:
- an upper shaft configured to vertically drive a needle;
- a presser foot drive cam fixed to the upper shaft;
- a presser foot urged downward over a needle plate;
- a cam follower configured to be in contact with the presser foot drive cam;
- and
- a link configured to transmit drive of the cam follower to the presser foot,
- wherein the presser foot drive cam includes a plurality of drive cams having cam surfaces for different presser foot vertical drive patterns, and
- wherein the cam follower includes a cam contact portion configured to be vertically driven and capable of contacting, at a leading end of the cam contact portion, any of the plurality of drive cams, and a switching unit configured to select one of the plurality of drive cams via the cam contact portion.
A sewing machine comprising a presser foot vertical drive device,
- wherein the presser foot vertical drive device comprises:
- an upper shaft configured to vertically drive a needle;
- a presser foot drive cam fixed to the upper shaft;
- a presser foot urged downward over a needle plate;
- a cam follower configured to be in contact with the presser foot drive cam;
- and
- a link configured to transmit drive of the cam follower to the presser foot,
- wherein the presser foot drive cam includes a plurality of drive cams having cam surfaces for different presser foot vertical drive patterns, and
- wherein the cam follower includes a cam contact portion configured to be vertically driven and capable of contacting, at a leading end of the cam contact portion, any of the plurality of drive cams, and a switching unit configured to select one of the plurality of drive cams via the cam contact portion.
Dependencies are inferred from the claim text.