The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 2020
Filed:
Dec. 09, 2015
Mitsubishi Pencil Company, Limited, Tokyo, JP;
Yoshiharu Namiki, Yokohama, JP;
Kazuhiko Furukawa, Yokohama, JP;
Yusuke Nakamura, Yokohama, JP;
Kazuhiko Takanashi, Tokyo, JP;
Atsushi Nakashima, Yokohama, JP;
Yoshihiro Manta, Yokohama, JP;
Mitsubishi Pencil Company, Limited, Tokyo, JP;
Abstract
Provided is a knock type writing instrument provided with a simple mechanism allowing a stable fretting operation or the like. A knock type writing instrumentis provided with: a shaft cylinder; a refillarranged inside the shaft cylinder; a springbiasing the refillbackward; an operation partpressed forward against a biasing force of the springin a knocking operation; and a main rotor, and is switchable between a writing state and a non-writing state with the knocking operation. The knock type writing instrumentis further provided with: a knock locking membermovable forward and backward inside the shaft cylinderdue to gravity; and a locking partprovided on a side of the shaft cylinderand capable of being locked with the knock locking member. When a front end of the shaft cylinderis directed upward, the knock locking membermoves backward to be locked with the locking partto prevent forward movement of the operation part