JPH0362886U

JPH0362886U -

Info

Publication number: JPH0362886U
Application number: JP12344789U
Authority: JP
Priority date: 1989-10-21
Filing date: 1989-10-21
Publication date: 1991-06-19

Description

[Brief explanation of the drawing]

第１図乃至第６図は第１実施例に係り、第１図
は中間部を省略した全体の断面図、第２図は第１
図Ａ−Ａ線断面図、第３図は第１図Ｂ−Ｂ線断面
図、第４図は第１図Ｃ−Ｃ線断面図、第５図は尾
栓の空隙室の前端を閉塞する前の状態を示す断面
図、第６図は尾栓の空隙室の前端を閉塞する工程
を示す断面図である。また第７図は第２実施例に
係る尾栓の断面図、第８図は第３実施例の要部断
面図、第９図は第４実施例の要部断面図である。１……インキ吸蔵体、２……軸、３……筆記部
、４……尾栓、４ｂ……内筒壁、５……内孔、６
……空隙室、７……周溝、８……通孔Ａ、９……
通孔Ｂ、１０……通気口、１１……縦溝。 1 to 6 relate to the first embodiment, FIG. 1 is a cross-sectional view of the whole with the intermediate part omitted, and FIG. 2 is a cross-sectional view of the first embodiment.
Figure 3 is a sectional view taken along the line B-B in Figure 1, Figure 4 is a sectional view taken along the line C-C in Figure 1, and Figure 5 shows the front end of the cavity chamber of the tail plug closed. FIG. 6 is a cross-sectional view showing the previous state, and FIG. 6 is a cross-sectional view showing the step of closing the front end of the cavity of the tail plug. 7 is a sectional view of the tail plug according to the second embodiment, FIG. 8 is a sectional view of the main part of the third embodiment, and FIG. 9 is a sectional view of the main part of the fourth embodiment. DESCRIPTION OF SYMBOLS 1... Ink absorber, 2... Shaft, 3... Writing part, 4... Tail plug, 4b... Inner cylinder wall, 5... Inner hole, 6
...Gap chamber, 7...Peripheral groove, 8...Through hole A, 9...
Through hole B, 10...Vent hole, 11...Vertical groove.

Claims

[Scope of utility model registration request]

A writing part 3 is disposed at the front end of a shaft 2 containing an ink absorber 1, and a tail plug 4 is fitted to the rear end of the shaft 3, so that the tail plug 4 faces the rear end surface of the ink absorber 1. an inner hole 5 which is opened, a cavity 6 located beside the inner hole 5 and partitioned from the inner hole 5, and a circumferential groove 7 that goes around the outer surface of the cylindrical portion 4a that fits into the shaft 2; Consists of a through hole A8 that communicates between the circumferential groove 7 and the cavity chamber 6, a through hole B9 that communicates between the cavity chamber 6 and the inner hole 5, and a vertical groove 11 that communicates between the circumferential groove 7 and the vent hole 10 that opens to the outside. A writing instrument characterized in that the void chamber 6 constitutes an air flow passage and is closed at a portion other than the through hole A8 and the through hole B9.