Replacement lead case

A replacement lead case, comprising:

• a case body, in which an inner space enclosed by a back plate and right and left leg plates is used as a replacement lead accommodation room, and a lid body is formed on a tip side and a case part is on a rear side via a bendable thin-walled portion placed near the tip of the back plate in a longitudinal direction, and
• a cover member, which is formed in a U-shaped cross-section perpendicular to the longitudinal direction by a front face plate and right and left outer leg plates, and in which the replacement lead accommodation room on the case body is covered by the front face plate, and which is slidably supported in the longitudinal direction by positioning the leg plates of the case body inside the outer leg plates,
• wherein
• a guide is formed along the longitudinal direction either on at least one of the leg plates in the lid body or on the outer leg plates on the cover member covering the leg plates, and also a sliding body in contact with the guide is formed on either one or the other, and
• with the sliding action of advancing the lid body of the case body from the tip of the cover member, the sliding contact of the sliding body against the guide causes the lid body to pivot to warp the lid body toward the rear plate through the thin-walled portion.