Sewing machine

Abstract

A sewing machine of the invention comprises: a bed part, an oil pan arranged under the bed part, a rotary shuttle arranged in the interior of the bed part, an end part connected to the shuttle axis of the rotary shuttle, a shuttle axis supporting part arranged in the interior of the bed part capable of rotatablely supporting the shuttle axis, and a blower mechanism which is used to cool the shuttle axle. The blower is characterized by being provided with an opening part formed on the wall of the oil pan, and the blower is arranged on the oil pan and is formed to jam the opening part, a partitioning vertical wall projecting from the bottom wall of the oil pan to the bed part is formed around the opening part, the partitioning vertical wall includes a screening wall part arranged at the connection part of the rotary shuttle and the shuttle axis, the screening wall part is configured to block the air supply from the blower to the rotary shuttle, the blower is utilized to supply air to the shuttle axis supporting part of the bed part.

Description

technical field [0001] The present invention relates to a sewing machine that cools a hook shaft that drives a hook to rotate by using an air blowing mechanism provided on an oil pan under a bottom plate portion. Background technique [0002] Conventionally, in various sewing machines such as a zigzag sewing machine, a needle bar up and down driving mechanism is provided at the front end of the housing portion, and a hook mechanism composed of a hook and a hook shaft for driving the hook to rotate is provided inside the bottom plate. In this sewing machine, the hook tip of the rotary hook is used to hook the upper thread extending from the eyelet of the sewing needle installed at the lower end of the needle bar to form an upper thread loop, and the stitches are formed by twisting the upper thread and the lower thread. . [0003] The rotary hook has an inner shuttle for accommodating a bobbin case and an outer shuttle for rotatably supporting the inner shuttle. A shuttle oi...

AI Technical Summary

Problems solved by technology

Therefore, the cooling efficiency of the hook shaft is poor, and the bottom plate also generates heat.

The wind sent from the cooling fan goes over the drive motor and the hook shaft until it reaches the rotary hook, which will cause the upper and lower threads to swing when the stitches are formed, resulting in the formation of stitches that cannot be formed and so-called skipped stitches. Problems with adverse effects

Images