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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/043785
Kind Code:
[Problem] To easily and reliably attach or secure a sewing machine needle to a needle clamp or replace the sewing machine needle. [Solution] A needle clamp (5) that clamps a sewing machine needle (3) includes: a clamp lever (19) which has a housing recess (7) that houses a sewing machine needle shank (15) and a clamp arm (21) that engages with the needle shank, and which is secured to a clamp lever shaft (17) that loosely fits in a long hole (13b) bored through the needle clamp in a manner that is openably closable relative to the housing recess; and a needle clamp spring (23) that causes the clamp lever to spring out beyond a straight line that connects a center point (N) of the needle shank to a center point of the clamp lever shaft. The needle clamp has a cam (71) and the clamp arm has a cam follower (70) that engages with the cam. As a path of movement for the clamp lever shaft, which constitutes the center of rotation (P) of the clamp lever, the long hole has three surfaces along which the cam follower moves over the cam.

SAKUMA, Tohru (1-12-7, Shimaminami, Yamagata-sh, Yamagata 86, 〒9900886, JP)
SUZUKI, Mitsuharu (1-12-7, Shimaminami, Yamagata-sh, Yamagata 86, 〒9900886, JP)
Application Number:
Publication Date:
March 07, 2019
Filing Date:
August 29, 2017
Export Citation:
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SUZUKI MANUFACTURING, LTD. (1-12-7, Shimaminami Yamagata-sh, Yamagata 86, 〒9900886, JP)
International Classes:
Attorney, Agent or Firm:
MORIYA, Kazuo (Toshin Bldg, 1-7-8 Nihonbashi-Honcho Chuo-ku Tokyo, 23, 〒1030023, JP)
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