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Patent Searching and Data


Title:
SEWING MACHINE AND UPPER THREAD TENSION ADJUSTMENT AND BIRD NEST REDUCTION DEVICE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/189749
Kind Code:
A1
Abstract:
A sewing machine and an upper thread tension adjustment and bird nest reduction device (2) thereof. The upper thread tension adjustment and bird nest reduction device (2) comprises a driving part (4). The driving part (4) is connected to an upper thread tension transmission assembly and a bird nest reduction transmission assembly. The upper thread tension transmission assembly is connected to an upper thread tension adjustment assembly for changing the size of the upper thread tension. The driving part (4) drives the upper thread tension transmission assembly to move, so that the upper thread tension adjustment assembly adjusts the size of the upper thread tension. The bird nest reduction transmission assembly is connected to a thread hooking assembly (7) for implementing thread hooking. The driving part (4) drives the bird nest reduction transmission assembly to move, so that the thread hooking assembly (7) performs thread hooking. According to the upper thread tension adjustment and bird nest reduction device (2), the two functions, i.e., upper thread tension adjustment and bird nest reduction control, are achieved separately by using the driving part (4), thereby simplifying the structural space to a certain extent and achieving the effect of saving electric energy.

Inventors:
HUANG MINGXUE (CN)
LIN XIAOXIAO (CN)
WAN YIMING (CN)
HONG ZHIMIN (CN)
Application Number:
PCT/CN2020/107008
Publication Date:
September 30, 2021
Filing Date:
August 05, 2020
Export Citation:
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Assignee:
JACK SEWING MACHINE CO LTD (CN)
International Classes:
D05B47/04; D05B47/00
Foreign References:
CN111235773A2020-06-05
CN204738119U2015-11-04
JP2003326063A2003-11-18
CN110219101A2019-09-10
CN1439758A2003-09-03
CN107574590A2018-01-12
CN105568575A2016-05-11
JPH09302571A1997-11-25
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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