Needle plate detachable mechanism and sewing machine having needle plate detachable mechanism
AssigneeJanome Sewing Machine Co., Ltd.
InventorsSaki Ishikawa, Koji Maeda
Life of this patent
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Abstract
In order to improve detachability of a needle plate, a needle plate detachable mechanism has a needle plate which is provided on a bed part of the sewing machine and made of a magnetic body; a magnet which is provided below the needle plate for fixing the needle plate by magnetic force; and a magnetic force changing mechanism which is connected with the magnet for changing the magnetic force acting on the needle plate by relatively moving the magnet with respect to the needle plate.
Claims5
A needle plate detachable mechanism of a sewing machine which forms a seam by vertically driving a needle by a driving force of a sewing machine motor, the needle plate detachable mechanism comprising:
- a needle plate which is provided on a bed part of the sewing machine and made of a magnetic body;
- a magnet which is provided below the needle plate for fixing the needle plate by magnetic force;
- and
- a magnetic force changing mechanism which is connected with the magnet for changing the magnetic force acting on the needle plate by relatively moving the magnet with respect to the needle plate, wherein
- the magnetic force changing mechanism has a rotary body which is arranged below the needle plate and rotatable around an axis parallel with the needle plate, and
- the magnet is provided on the rotary body to be rotatable integrally with the rotary body.
Dependencies are inferred from the claim text.