Replacement lead case

Patent metadata

Field	Value
Publication number	US-12358685-B2
Application number	US-202118257784-A
Country	US
Kind code	B2
Filing date	Dec 16, 2021
Priority date	Dec 17, 2020
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A replacement lead case includes a case body that forms an inner space surrounded by a rear surface plate and right and left leg plates as a replacement lead accommodation room and has a lid body on the tip end thereof and a case part on a rear part thereof via a bendable thin part provided on the rear surface plate, and a cover member that has a U-shaped cross-section orthogonal to a longitudinal direction molded by a front surface plate and right and left outer leg plates covers the replacement lead accommodation room on a case body with the front surface plate and slidably supports the case body in the longitudinal direction with the leg plates positioned on the inside of the outer leg plates. A rail-shaped guide is formed on the lid body along the longitudinal direction, and the cover member includes a slider that contacts the guide.

First claim

The invention claimed is:

1. 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.

2. The replacement lead case recited in claim 1 , further comprising:
an inner lid body, attached to the right and left leg plates of the case body and covering the replacement lead accommodation room at the front face side,
wherein protrusions to prevent accommodated replacement leads from surface contacting are formed on an inner surface of the replacement lead accommodation room side of the rear plate of the case body and an inner surface of the replacement lead accommodation room side of the inner lid body.

3. The replacement lead case recited in claim 1 ,
wherein the guides are formed protruding in a rail form extending along the longitudinal direction outside the leg plates of the lid body, and
also, the sliding body is formed protruding to be in contact with the guide at the tip portion of the cover member from which the sliding action advances the lid body, and the sliding action causes the lid body to pivot to warp the lid body toward the rear plate through the thin-walled portion by forming an inclined region on the guide leaving from the rear plate as toward the thin-walled portion from the tip portion.

4. The replacement lead case recited in claim 1 , wherein
at the tip end side of the lid body, a blocking plate is formed to close the tip end by connecting the right and left leg plates, and the blocking plate is visibly recognizably disposed at the tip end of the cover member, in a state where the lid body is accommodated in the cover member and the front face plate of the cover member is viewed from the front.

5. The replacement lead case recited in claim 1 , wherein
the case body and the cover member are both made of a resin material, a group of a large number of line protrusions is formed in a direction orthogonal to the longitudinal direction on the backside of the rear plate of the case body, and a circular-shaped recess is formed on the surface of the front face plate of the cover member.

6. The replacement lead case recited in claim 2 , wherein
a rib for sliding is formed along the longitudinal direction of the inner lid body on the outer surface of the inner lid body, and the inner bottom face of the cover member has a matte-finished surface.

7. The replacement lead case recited in claim 1 , wherein
the case body is provided with an operation part protruding outwardly from the leg plate; moving the operation part relative to the longitudinal direction of the cover member achieves a sliding motion to advance the lid body of the case body from the tip end of the cover member.

8. The replacement lead case recited in claim 1 , wherein the cover member, which is integrally formed of the right and left outer leg plates which are provided on both sides of the front face plate to form the U-shaped cross-section perpendicular to the longitudinal direction, is integrally formed with an inward protrusions which face inwardly toward the right and left outer leg plates, and wherein on an inner bottom face of the front face plate which is located between the right and left outer leg plates of the cover member, a first step portion having a step against the inner bottom face is formed along the right and left outer leg plates except for a central portion of the longitudinal direction of the inner bottom face.

9. The replacement lead case recited in claim 8 , wherein
a second step portion with a step against the inner surface is formed continuously from the first step portion on the opposing inner surfaces of the right and left outer leg plates.

10. The replacement lead case recited in claim 9 , wherein
a third step portion, which has a different concavo-convex direction from the first step portion, is formed at a displaced position from the first step portion on the inner bottom face of the front face plate which is located between the right and left outer leg plates.

11. The replacement lead case recited in claim 10 , wherein
the first step portion protrudes from the inner bottom face, and the third step portion is recessed to the inner bottom face.

Assignees

• Mitsubishi Pencil Co

Inventors

• Kawabata Mitsuhiro
• Nakamura Kyoichiro
• Fujisawa Kiyoshi

Classifications

• B65D2543/00388

  Bent or angled, i.e. central part presents two main planes · CPC title

• B65D85/24

  for needles, nails or like elongate small articles · CPC title

• B65D43/20

  linearly slidable · CPC title

• B65D1/34

  Trays or like shallow containers {(B65D81/3813 takes precedence)} · CPC title

• B65D85/20

  for incompressible or rigid rod-shaped or tubular articles · CPC title