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Title:
SEWING MACHINE NEEDLE CLAMPING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/149793
Kind Code:
A1
Abstract:
[Problem] To reliably and easily mount and fix a sewing machine needle to a needle stopper or replace the sewing machine needle. [Solution] In the present invention, a needle stopper (5) for clamping a sewing machine needle (3) is provided with: an accommodation recess (7) for accommodating a needle stem (15) of the sewing machine needle (3); a clamping lever (19) which has a clamping arm (21) for engaging the needle stem (15), can be opened and closed with respect to the accommodation recess (7), and is fixed to a clamping lever shaft (17) which is mounted loosely through an elongated hole (13b) formed in the needle stopper (5); and a needle fixing spring (23) which elastically presses the clamping lever (19) toward the outside of a line connecting the center point (N) of the needle stem (15) and the center point (P) of the clamping lever shaft (17). The clamping arm (21) comprises a force application locking part (22) which, when the clamping lever (19) is swung in a clamping direction (a), slides on the needle stem (15) of the sewing machine needle (3) against the elastic force of the needle fixing spring (23), passes through a branch point position (tp) at which the elastic force of the needle fixing spring (23) is maximum on the line connecting the center point (N) of the needle stem (15) of the sewing machine needle (3) and the center point (P) of the clamping lever shaft (17), and maintains a stable clamping state by the elastic force of the needle fixing spring (23).

Inventors:
SAKUMA, Tohru (1-12-7, Shimaminami, Yamagata-sh, Yamagata 86, 〒9900886, JP)
Application Number:
JP2016/069417
Publication Date:
September 08, 2017
Filing Date:
June 30, 2016
Export Citation:
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Assignee:
SUZUKI MANUFACTURING, LTD. (1-12-7, Shimaminami Yamagata-sh, Yamagata 86, 〒9900886, JP)
International Classes:
D05B55/02
Attorney, Agent or Firm:
MORIYA, Kazuo (Daiichi Teikei Bldg, 1-13-4 Nihonbashi-Kakigaracho Chuo-ku Tokyo, 14, 〒1030014, JP)
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