WRITING INSTRUMENT

• Main Authors: SUZUKI HITOSHI, SAWA YUKINORI, KAMIYA TOSHIFUMI, HIRANO KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 08.03.2018
• Subjects: BUREAU ACCESSORIES; IMPLEMENTS FOR WRITING OR DRAWING; PERFORMING OPERATIONS; TRANSPORTING; WRITING OR DRAWING IMPLEMENTS

PROBLEM TO BE SOLVED: To provide a writing instrument that can further increase durability of a writing core without impairing writing performance even when writing with a strong writing load.SOLUTION: In a writing instrument A, a writing part is constituted of at least a writing core 30 formed of a porous body and a support body 40 formed of a rigid material. A protrusion amount on a tip side of the writing core 30 from the support body 40 is 0.65 mm or more and 1.05 mm or less and/or 40% or more and 65% or less of a thickness of the writing core 30.SELECTED DRAWING: Figure 2 【課題】強い筆記荷重で筆記しても筆記性能を損なうことなく、筆記芯の耐久性を更に向上させることができる筆記具を提供する。【解決手段】少なくとも、多孔体からなる筆記芯３０と硬質材料からなる保持体４０とから筆記部が構成される筆記具Ａであって、保持体４０からの筆記芯３０の先端側の突出量が０．６５ｍｍ以上、１．０５ｍｍ以下及び／又は筆記芯３０の厚さの４０％以上、６５％以下であることを特徴とする筆記具。【選択図】図２