Abstract: An eraser case includes a cylindrical container in which an eraser with a cylindrical hole is stored to be extendable and retractable. A twist-up base is slidable in an axial direction inside the cylindrical container, and an end part of an eraser stored in the cylindrical container is fixed to the twist-up base. A screw shaft body can be inserted into the cylindrical hole of the eraser and can push the twist-up base out by being inserted into and threadedly engaged with a screw hole piercing through the twist-up base to convert an axial rotational motion into an axial motion of the twist-up base. The twist-up base includes a convex locking portion protruding toward the eraser. The convex locking portion fixes the eraser to the twist-up base by being locked to a concave locking portion provided on an inner wall surface of the cylindrical hole of the eraser.

Abstract: To provide a double clip that can reduce a force for an opening operation while maintaining a length of lever members as long as conventional ones, a double clip 1 includes a clip main body 10 and a pair of lever members 30. The clip main body has two plate-shaped portions 11, 12 and a bottom plate portion 13 connecting thereto. An opening portion 14 is formed by the plate-shaped portions abutting with each other by virtue of elasticity thereof. The lever members are formed long and connect to the plate-shaped portions. First fulcrum portions 11a, 12a are formed between the plate-shaped portions and the lever members to constitute fulcrums of the lever members when they perform an opening operation. The first fulcrum portions are disposed closer to a bottom plate portion side than a central position of a distance from the bottom plate portion to the opening portion.

Abstract: To provide a double clip that can reduce a force for an opening operation while maintaining a length of lever members as long as conventional ones, a double clip 1 includes a clip main body 10 and a pair of lever members 30. The clip main body has two plate-shaped portions 11, 12 and a bottom plate portion 13 connecting thereto. An opening portion 14 is formed by the plate-shaped portions abutting with each other by virtue of elasticity thereof. The lever members are formed long and connect to the plate-shaped portions. First fulcrum portions 11a, 12a are formed between the plate-shaped portions and the lever members to constitute fulcrums of the lever members when they perform an opening operation. The first fulcrum portions are disposed closer to a bottom plate portion side than a central position of a distance from the bottom plate portion to the opening portion.