Sewing machine with needle thread cassette and needle thread cassette
AssigneeBrother Kogyo Kabushiki Kaisha
InventorHiroshi Kitazawa
Life of this patent
Estimating the term…
Abstract
A sewing machine with a needle thread cassette, wherein a cassette mount (3) is reduced in size. The cassette mount (3) including a thread take-up lever travel region is formed in the form of a vertical groove in the arm head of the sewing machine. A needle thread cassette (2) having a thread bobbin (62) vertically received therein is removably mounted on the cassette mount (3) vertically from above. With a thread take-up lever (25) stopped in a position corresponding to a needle top stop position, the needle thread cassette (2) is mounted on the cassette mount (3), whereby the thread is engaged with the thread guard of the thread take-up lever (25) and a thread tension regulator (9).
Claims18
A sewing machine with a needle thread cassette, in which a needle thread cassette housing a thread bobbin is removably mounted in an arm, characterized:
- by comprising a cassette mount disposed near a thread take-up lever travel region, in which a thread guard of a thread take-up lever reciprocally travels, for removably mounting said needle thread cassette;
- in that said needle thread cassette includes a cassette case, and a thread bobbin retaining portion for retaining a thread bobbin disposed in said cassette case;
- and
- in that said needle thread cassette is mounted in said cassette mount such that at least one of the axial direction of the thread bobbin retained in said thread bobbin retaining portion and the direction to feed out the thread from said thread bobbin is made generally parallel to the reciprocal traveling direction of the thread guard of the thread take-up lever.
A sewing machine with a needle thread cassette, in which a needle thread cassette housing a thread bobbin is removably mounted in an arm, characterized:
- by comprising:
- a cassette mount disposed on the front face of the leading end portion of said arm for removably mounting said needle thread cassette;
- a thread take-up lever travel region disposed in said arm near said cassette mount and closer to the portion of the base side, for allowing the thread guard of the thread take-up lever to reciprocally travel therein;
- and
- a thread tension regulator disposed to protrude at the lower end side of said cassette mount;
- in that said needle thread cassette includes a cassette case;
- and
- in that said cassette case includes:
- a thread bobbin retaining portion for retaining said thread bobbin with a vertical axis;
- a thread exit for feeding the thread fed out from said thread bobbin, to the outside of said cassette case;
- a thread passage for guiding the thread fed out from said thread bobbin, to said thread exit;
- a slit for protruding the thread guard of the thread take-up lever into the cassette case;
- and
- a notch for protruding the thread tension regulator into the cassette case.
A needle thread cassette to be removably mounted on the arm of a sewing machine, characterized:
- by comprising:
- a cassette case;
- a thread bobbin;
- a thread bobbin retaining portion disposed in said cassette case for retaining said thread bobbin in the cassette case;
- and
- a thread passage disposed in said cassette case for guiding the thread fed out from said thread bobbin, to said thread exit;
- and
- in that said thread bobbin or said thread passage is so arranged that when the needle thread cassette is mounted in the sewing machine, at least one of the axial direction of the thread bobbin retained in said thread bobbin retaining portion and the direction to feed out the thread from said thread bobbin is made generally parallel to the reciprocal traveling direction of the thread guard of the thread take-up lever.
Dependencies are inferred from the claim text.