Presser-foot lifting and lowering device for sewing machine
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United States of America Patent
Stats
-
Mar 29, 2016
Grant Date -
Aug 20, 2015
app pub date -
Jun 5, 2013
filing date -
Oct 31, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
When lifting and lowering the presser-foot by either of the manual operation lever and the knee operation lifter, the composition of the lifting and lowering mechanism can be simplified, the number of parts can be reduced and the production can be performed easily. The present invention is provided with a presser bar lifting and lowering mechanism (30) which has: a lifter operating plate which is disposed upon a pedestal (2a) which supports an arm (2) upon a bed (3) and which is vertically movable depending on a vertical movement operation of a manual operation lever (31); a pivot rod in which one end is joined to the lifter operating plate via a first joining link; and a presser-foot bar lifting and lowering plate which is joined to a second joining link which is joined to the other end of the pivot rod, and which is joined to the presser-foot bar via a presser bar holder which is fixed to the presser-foot bar. The present invention is provided with a knee lifter mechanism (50) which is disposed upon a right lower end (3a) of the bed, which is equipped with a knee operation lifter (51), and which has a knee lifter drive arm which rotates by a swing of the knee operation lifter, wherein the knee lifter drive arm is joined to the lifter operating plate.
First Claim
Family
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Cited Art Landscape
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