Title:
SEWING MACHINE SHUTTLE STRUCTURE AND SEWING MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/053507
Kind Code:
A1
Abstract:
The present invention addresses the problem of avoiding formation of a hitch stitch caused by a bobbin thread. A shuttle (3) includes: a bobbin case (40) for storing a bobbin-thread bobbin; an inner shuttle (50); and an outer shuttle (60). A needle location hole (51) is provided in the front surface of the upper part of the inner shuttle. A recess (52) is formed at a position (e.g., position to the left of the vertical motion line of a sewing needle) offset in the rotation direction of the outer shuttle from the needle location hole in the front surface of the upper part of the inner shuttle. The recess (52) is open at the front side and above and below, and the back side thereof forms a wall surface. The bobbin case is provided with a thread take-up member (41) for directing the bobbin thread delivered from the bobbin-thread bobbin toward the recess. The bobbin thread delivered from the bobbin-thread bobbin passes through the recess via the thread take-up member, and is directed toward a needle hole in a needle plate above the recess. Since the recess is at a position to the left of the vertical motion line of the sewing needle, the path of the bobbin thread from the shuttle to the needle hole is to the left of the vertical motion line of the sewing needle, and hitch stitch formation caused by the bobbin thread can be structurally avoided.
Inventors:
EGAMI SHINKO (JP)
YOSHIDA TAKAHIRO (JP)
YAMASHITA TATSUYA (JP)
YOSHIDA TAKAHIRO (JP)
YAMASHITA TATSUYA (JP)
Application Number:
PCT/JP2022/011963
Publication Date:
April 06, 2023
Filing Date:
March 16, 2022
Export Citation:
Assignee:
TISM CO LTD (JP)
International Classes:
D05B57/14; D05B57/26
Foreign References:
| JPH0268096A | 1990-03-07 | |||
| JP2008086391A | 2008-04-17 | |||
| JP2006239389A | 2006-09-14 | |||
| JPH06343780A | 1994-12-20 | |||
| JP2515400B2 | 1996-07-10 | |||
| JPH06343780A | 1994-12-20 | |||
| JP2008023261A | 2008-02-07 | |||
| JP2012213603A | 2012-11-08 | |||
| JP2540051B2 | 1996-10-02 |
Attorney, Agent or Firm:
IIZUKA Yoshihito (JP)
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