Patent ID: 7954212

Claim:
A sheet attaching instrument ( 10 ) having: an instrument body ( 12 ) attached to a front surface of a sheet ( 1 ); and a fixing member ( 14 ) arranged on a back surface of the sheet ( 1 ) to fix the instrument body ( 12 ) to the sheet ( 1 ), wherein the instrument body ( 12 ) includes: a first projection ( 20 ); and a second projection ( 30 ) penetrating the sheet ( 1 ), the first projection ( 20 ) and the second projection ( 30 ) provided on a surface contacting the sheet ( 1 ) to be apart from each other, the fixing member ( 14 ) includes: a first engaging portion ( 40 ) adapted to be engaged with the first projection ( 20 ); and a second engaging portion ( 50 ) adapted to be engaged with the second projection ( 30 ), the first engaging portion ( 40 ) allowing one of the instrument body ( 12 ) and the fixing member ( 14 ) to be rotated with the first projection ( 20 ) being a support point in a direction of approaching the other, the second engaging portion ( 50 ) being engageable with the second projection ( 30 ) when the instrument body ( 12 ) and the fixing member ( 14 ) approach each other, and the second engaging portion ( 50 ) includes: a second insertion hole ( 51 ) into which the second projection ( 30 ) is inserted, the second insertion hole ( 51 ) being engaged with the second projection ( 30 ); and an elastically deformable portion ( 53 ) that is elastically deformed in a direction in which at least a part of the second insertion hole ( 51 ) is expanded, the elastically deformable portion ( 53 ) being provided at a position at which a tip end of the second projection ( 30 ) abuts on the elastically deformable portion ( 53 ) when the instrument body ( 12 ) and the fixing member ( 14 ) are rotated, the elastically deformable portion ( 53 ) including a deformable operation portion ( 58 ) that is applied with a force in the insertion direction of the second projection ( 30 ) and deforms the elastically deformable portion ( 53 ) to expand the second insertion hole ( 51 ) on a surface of the elastically deformable portion ( 53 ) facing the sheet ( 1 ), the elastically deformable portion ( 53 ) being abutted by the tip end of the second projection ( 30 ) or the second projection ( 30 ), and in the state where the first projection ( 20 ) and the second projection ( 30 ) of the instrument body ( 12 ) are engaged with first engaging portion ( 40 ) and the second engaging portion ( 50 ) of the fixing member ( 14 ), the sliding of the instrument body ( 12 ) is restricted.