US 2016/0083885 A1 · CUTTING DEVICE FOR A SEWING MACHINE

Abstract

A cutting device for a sewing machine includes an upper-blade positioning device and a lower-blade positioning device. The upper-blade positioning device includes an upper blade upper blade fixed at a head portion of the upper-blade holder, and a spring and a restricting member sleeved on a body portion of the upper-blade holder. A restricting pin is engaged between an upper-blade drive member and the restricting member. A guide member includes a guide hole for insertion of a rod portion of the upper-blade drive member and is fixed to the base. The upper-blade drive member is inserted through a guide member of the base and moved by a connecting rod. The lower-blade positioning device includes a lower-blade holder, an adjustment member. A lower-blade shaft has one end fixed to the base and another end extended out of the base, rotating the adjustment member can adjust the position of the lower-blade holder.

Claims5

Dependent claims

A cutting device for a sewing machine , the sewing machine including a driven shaft and using an upper-blade drive device to move an upper blade mounted on a base of the cutting device, on the base being further disposed a lower-blade positioning device;

the lower-blade positioning device including a lower-blade holder and a lower blade mounted on the lower-blade holder;
the cutting device being characterized in that:
the lower-blade holder is formed with a threaded hole;
the adjustment member is formed with an axial hole and a threaded adjustment portion to be screwed in the axial hole;
a lower-blade shaft has one end fixed to the base and has another end extended out of the base, rotating the adjustment member adjusts the position of the lower-blade holder.

2 more elements

Dependencies are inferred from the claim text.

Cutting device for a sewing machine

Life of this patent

Cutting device for a sewing machine

Life of this patent

Abstract

Claims5