Importance

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Abstract

A presser foot device comprises a presser foot shank ?2! which has clamp member through holes ?2d! for guiding clamp members in moving forward and backward formed at the lower portion thereof and a groove for receiving the hinge pin ?3b! of a presser foot plate ?3! formed on the lower surface of the front side thereof and a groove ?2a! for receiving the hinge pin ?3b! of a presser foot plate ?3! therein formed on the lower surface of the front side thereof, and which is detachably attached to a presser bar ?5,! an elastic ?9! member which is fixed to the rear portion of the presser foot shank ?2! at one end portion thereof, and the clamp members ?7! each having a hook portion ?7a! for retaining the hinge pin ?3b! of the presser foot plate ?3! at the tip end portion thereof, wherein the hinge pin ?3b! of the presser foot plate ?3! is elastically clamped by the hook portions ?7a! of the clamp members ?7! and the rear wall ?2c! of the groove ?2a!. As a result, it is possible to provide a presser foot device simple in structure, superior in reliability with regard to the essential function of a presser foot plate, and superior in durability.

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First Claim