Title:
KNOCK TYPE WRITING INSTRUMENT
Document Type and Number:
WIPO Patent Application WO/2010/010825
Kind Code:
A1
Abstract:
A knock type writing instrument configured such that a refill can be easily replaced by simple operation and also such that deformation of a slit and a crack in a shaft tube are suppressed during the replacement of the refill.
A knock type writing instrument is provided with a shaft tube (1) having a long hole (1b), a refill (2) inserted in the shaft tube (1), an urging member (3) for urging the refill (2) rearward, a knock member (4) inserted in the rear of the shaft tube (1), an elastic section (4e) connected to the front end of the knock member (4) so as to extend rearward and elastically deformable in the radial direction of the shaft tube (1), an engaging projection (4f) formed at the rear end of the elastic section (4e), and a clip (5) having a clip leg section (5a) which is connected to the elastic section (4e) and is slidably fitted in the long hole (1b) and also having a front part which is caused to make pressure contact with or become close to the outer periphery of the shaft tube (1). In a rear peripheral wall of the shaft tube (1), there are formed an engaging hole (1d) and a rear slit (1e) so as extend in the direction in which the rear end of the long hole (1b) extends. The engaging hole (1d) connects to the rear end of the long hole (1b) through an intermediate slit (1c), and the rear slit (1e) connects to the rear end of the engaging hole (1d) and extends to the rear end of the shaft tube (1). At the rear end of the clip leg section (5a) is formed a rear end ridge section (5c) for pushing out the clip (5) toward the rear end of the shaft tube (1) by a pressing force greater than an urging force of an urging member (3) to sequentially expand the intermediate slit (1c) and the rear slit (1e) in the width direction of the slits.
Inventors:
KAGEYAMA HIDEHEI (JP)
Application Number:
PCT/JP2009/062660
Publication Date:
January 28, 2010
Filing Date:
July 13, 2009
Export Citation:
Assignee:
KOTOBUKI & CO LTD (JP)
KAGEYAMA HIDEHEI (JP)
KAGEYAMA HIDEHEI (JP)
International Classes:
B43K24/08; B43K25/02
Foreign References:
| JP3139755U | 2008-02-28 | |||
| JPH0370996U | 1991-07-17 | |||
| JPH04221700A | 1992-08-12 |
Other References:
See also references of EP 2327564A4
None
None
Attorney, Agent or Firm:
KATO Masanobu et al. (JP)
Koen Kato (JP)
Koen Kato (JP)
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