Fixture unit and cover fixing method

A cover fixing method that is used for a seat comprising a seat body and a cover that covers the seat body, the cover fixing method being used for fixing the cover to the seat body, the method comprising:

• an attaching step for attaching an attachment member of a fixing unit to the seat body and engaging the cover with a string member connected to the attachment member;
• and
• an engaging step for engaging an engaging member to an opening provided to the seat body, the engaging member being provided on a side opposite the attachment member with the string member being interposed therebetween, wherein
• in the engaging step a contact portion provided on the engaging member is brought into contact with a first periphery of the opening,
• the engaging member is rotated around the contact portion to insert an insert portion into the opening, and
• a part of the insert portion is brought into contact with a second periphery of the opening opposite the first periphery to retain the insert portion in the opening.

A fixing unit that is configured to fix a cover to a seat, the fixing unit comprising:

• an attachment member having a hook;
• a string member that connects the attachment member and an engaging member;
• the engaging member comprising:
• a body to which the string member is attached;
• an insert portion provided to the body, wherein the insert portion comprises:
• a first extension extending in a direction perpendicular to a central axis of the body;
• a bent portion that is bent from an end of the first extension away from an end of the body attached to the string member;
• a second extension extending from the bent portion towards the body;
• and
• a first restricting portion provided at an end of the second extension;
• and
• a first contact portion, a second contact portion, and a third contact portion, wherein the first contact portion, the second contact portion, and the third contact portion are provided to the body and are spaced apart from the insert portion.