CONNECTION STRUCTURE OF BALL-POINT PEN REFILL COMPONENT AND WRITING INSTRUMENT HAVING THE CONNECTION STRUCTURE

• Main Authors: KUDO NAOTO, NAKADA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 22.08.2016
• Subjects: BUREAU ACCESSORIES; IMPLEMENTS FOR WRITING OR DRAWING; PERFORMING OPERATIONS; TRANSPORTING; WRITING OR DRAWING IMPLEMENTS

PROBLEM TO BE SOLVED: To prevent ink from penetrating and spreading into a connection part of a ball-point pen refill component.SOLUTION: The peripheral surface of one of the rear end side outer peripheral surface of a chip side tubular component 20 and the front end side inner peripheral surface of an ink storage tube side tubular component 10 is provided with a first annular projection 22a kept in contact with the other peripheral surface over the whole surface and a second annular projection 22b kept in contact with the other peripheral surface over the whole surface at a position away rearward from the annular projection 22a, thereby forming an annular recess 22c covering the whole surface between the first annular projection 22a and the second annular projection 22b, and making the diameter of the projected end of the second annular projection 22b larger than the projected end of the first annular projection 22a.SELECTED DRAWING: Figure 6 【課題】 ボールペンリフィール用部品の接続箇所にインクが浸み込んで拡がるのを阻む。【解決手段】 チップ側管状部品２０の後端側外周面と、インク収容管側管状部品１０の前端側内周面とのうち、その一方の周面に、全周にわたって他方の周面に圧接される第１の環状突出部２２ａと、第１の環状突出部２２ａに対し後方へ離れた位置で全周にわたって他方の周面に圧接される第２の環状突出部２２ｂとを設けて、これら第１の環状突出部２２ａと第２の環状突出部２２ｂとの間に全周にわたる環状凹部２２ｃを形成するとともに、第２の環状突出部２２ｂの突端部の径を第１の環状突出部２２ａの突端部の径よりも大きくした。【選択図】 図６