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Title:
SEWING MACHINE
Document Type and Number:
Japanese Patent JP2007244721
Kind Code:
A
Abstract:

To provide a sewing machine in which a feed dog can be silently changed to a descent position by a feed dog action changing means and the changing of the feed dog to the descent position can be conducted under the necessary minimum under the conditions that a needle thread and a bobbin thread cut.

An up/down feed cam part 17 integrally formed with an eccentric cam part 17a and a concentric cam part 17b is fixed to a lower shaft 20. A cam contact piece 19a of an up/down feed contact piece 19 is able to shift to the eccentric cam part 17a and to the concentric cam part 17b. At a timing of the feed dog 6 in the descent position, a feed dog lowering motor 31 is clockwise rotated. Rotations of a driven gear 36, a leftward shift of a first slide lever 33 through an engagement pin 42 engaging with a screw groove cam 36a, a swing of a swing lever 34 and a rightward shift of a second slide lever 35 shifts the up/down feed contact piece 19 to the concentric cam part 17b through a contact piece shifting member 32, changing the feed dog 6 to an inactive state.

COPYRIGHT: (C)2007,JPO&INPIT


Inventors:
HIROSE HIROKAZU
Application Number:
JP2006074267A
Publication Date:
September 27, 2007
Filing Date:
March 17, 2006
Export Citation:
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Assignee:
BROTHER IND LTD
International Classes:
D05B27/24
Domestic Patent References:
JP2006034561A2006-02-09
JP2000024353A2000-01-25
JPH02142595A1990-05-31
JPH07313767A1995-12-05
JPH06190177A1994-07-12
JP2000279671A2000-10-10
Attorney, Agent or Firm:
Toshio Okamura