BALLPOINT PEN - MITSUBISHI PENCIL CO

Title:

BALLPOINT PEN

Document Type and Number:

WIPO Patent Application WO/2018/097243

Kind Code:

A1

Abstract:

The present invention changes the thickness of a drawn line by increasing ink flow in association with writing load without using a member other than the tip of a ballpoint pen that can contact a writing surface and achieves a soft writing feel with the cushioning effect of a connector. A connector 20 for connecting a ballpoint pen tip 60 with an ink-holding tube 16 is provided with a back member 30 that is installed on the leading end of the ink-holding tube 16, a front member 40 on which the back end of the ballpoint pen tip 60 is installed, and an intermediate member 50 for connecting same. The intermediate member 50 has a structure with greater elasticity than the back member 30 and the front member 40. The back member 30 is provided with: a cylindrical back connecting part 31 that is press-fitted inside the leading end of the ink-holding tube 16; a flange part 33 that expands radially in front of the back connecting part 31 by means of a step 32; and a front connecting part 34, the outer diameter of which decreases in front of the flange part 33 and to which the intermediate member 50 connects. Additionally, the leading end of the ink-holding tube 16 abuts against the step 32.

Inventors:

NAKAJIMA TOORU (JP)
FURUKAWA KAZUHIKO (JP)
FUKUMOTO TAKEO (JP)

Application Number:

PCT/JP2017/042200

Publication Date:

May 31, 2018

Filing Date:

November 24, 2017

Export Citation:

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Assignee:

MITSUBISHI PENCIL CO (JP)

International Classes:

B43K7/10; B43K7/08

Foreign References:

JP2015199303A	2015-11-12
JP2007030375A	2007-02-08
JP2009034877A	2009-02-19