US Patent 9903407 Fastener

A fastener includes: a first leg part; a second leg part; a coupling part coupling one ends of the first leg part and the second leg part; a first head part and a second head part which are provided with a flange for engaging with a front-side edge of an attachment hole, and a pressing surface for a user to press, and which are provided to other ends of the first leg part and the second leg part; and a screw hole formed in the second head part, and into which a screw member is screwed. The first leg part includes a first engagement part capable of engaging with a rear-side edge of the attachment hole. The second leg part includes a second engagement part capable of engaging with the rear-side edge of the attachment hole.