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Patent Searching and Data


Title:
SEWING MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/169182
Kind Code:
A1
Abstract:
A sewing machine, comprising a presser foot connecting rod (32, 77) and a swing plate seat (10, 69), and further comprises a cam crank (3, 65) and a crank driving device (1, 61) used for driving the cam crank to rotate around a cam rotating center on the cam crank. The cam crank is connected to an output end of the crank driving device; the cam crank comprises a presser foot adjusting part and a plate seat adjusting part; in a presser foot mode, the cam crank rotates and drives the presser foot connecting rod to move by means of the presser foot adjusting part; in a needle pitch adjusting mode, the cam crank rotates and pushes the swing plate seat to move by means of the plate seat adjusting part. Different parts on the cam crank are adopted to drive the presser foot connecting rod and the swing plate seat respectively, the functions of automatic backstitch, automatic dense seam and automatic presser foot can be achieved only by providing one crank driving device, the needle pitch can be adjusted, a backstitch electromagnet, a dense seam electromagnet and a presser foot electromagnet can be omitted, and the occupied space of the sewing machine can be saved.

Inventors:
HUANG LINWEI (CN)
GUAN JIANPING (CN)
LIN XIAOXIAO (CN)
Application Number:
PCT/CN2020/107005
Publication Date:
September 02, 2021
Filing Date:
August 05, 2020
Export Citation:
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Assignee:
JACK SEWING MACHINE CO LTD (CN)
International Classes:
D05B29/02; D05B69/14; D05B69/20
Foreign References:
CN111118752A2020-05-08
CN105002663A2015-10-28
CN209428705U2019-09-24
CN109989186A2019-07-09
JPH0523465A1993-02-02
US4867082A1989-09-19
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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