JPS6310309Y2

JPS6310309Y2 -

Info

Publication number: JPS6310309Y2
Application number: JP16289383U
Authority: JP
Priority date: 1983-10-21
Filing date: 1983-10-21
Publication date: 1988-03-28
Also published as: JPS6069688U

Description

【考案の詳細な説明】本考案はインキ吸蔵体を内蔵した水性ボールペ
ン、フエルトペン等の筆記具に関する。[Detailed Description of the Invention] The present invention relates to a writing instrument, such as a water-based ballpoint pen or a felt-tip pen, which has an ink absorber built-in.

従来のこの種の筆記具は第３図に示すように軸
筒１の先端部に空気孔２が設けられており、この
近傍に露出した状態に位置した中継芯３からイン
キが蒸発し、インキの不揮発成分が中継芯で固定
してしまい、インキ吸蔵体４に十分にインキを残
存させながら筆記不能に陥る欠点があつた。この
欠点を解消するために空気孔を軸筒後端に移転す
る考案がなされたが、やはりインキ吸蔵体の後端
面からインキが蒸発する弊が生じる。更にこの欠
点を解消するためには空気孔の径を小さくしてそ
の長さも増大させ可能な限り空気の流動が押さえ
られる構造にすれば良いが軸筒後端にこのような
空気孔を設けることは加工上困難である。又、空
気孔には落下等の衝撃によつてインキ吸蔵体から
飛散するインキ滴が侵入して閉塞してしまう欠点
も存在している。 As shown in Fig. 3, this type of conventional writing instrument has an air hole 2 at the tip of the barrel 1, and the ink evaporates from the relay core 3 which is exposed near this hole. The non-volatile components are fixed at the relay core, making it impossible to write even though a sufficient amount of ink remains in the ink absorber 4. In order to solve this problem, an idea has been made to move the air hole to the rear end of the barrel, but this still results in the disadvantage that ink evaporates from the rear end surface of the ink storage body. Furthermore, in order to eliminate this drawback, it is possible to create a structure that suppresses the flow of air as much as possible by reducing the diameter of the air hole and increasing its length, but it is necessary to provide such an air hole at the rear end of the shaft cylinder. is difficult to process. In addition, there is a drawback that ink droplets scattered from the ink storage body due to an impact such as a drop enter the air holes and become clogged.

本考案は空気孔からのインキの蒸発が有効に防
止されると共に落下等の衝撃を受けてもインキが
飛散して空気孔を閉塞することのない筆記具の提
供を目的とする。 The object of the present invention is to provide a writing instrument which effectively prevents ink from evaporating from the air holes and which does not cause the ink to scatter and block the air holes even when subjected to impact such as being dropped.

本考案はインキ吸蔵体を内蔵する筆記具に於
て、軸筒の後端に嵌着する尾栓にその内部と外部
を連通する孔を設け、又、中空細管で先端部に曲
折部を有しその先端口が基端方向へ向いた空気パ
イプを尾栓内部に収納しその基端部を前記の尾栓
の孔内に密嵌したことを特徴として構成され前記
の目的を達成せんとする。 The present invention is a writing instrument with a built-in ink absorber, in which a tail plug that fits into the rear end of the barrel has a hole that communicates the inside and outside, and a hollow thin tube with a bent part at the tip. This object is achieved by having an air pipe whose tip end faces toward the proximal end housed inside the tail plug, and whose base end is tightly fitted into the hole of the tail plug.

第１図に示した実施例は、インキ吸蔵体５を内
蔵した軸筒６の後端に嵌着する尾栓７の中央部に
軸方向の孔８が設けられ、中空細管で先端部にＵ
状の曲折部９が設けられ且つその先端口１０が基
端方向へ向いた空気パイプ１１が尾栓内部に収納
されその基端部１２を前記孔８内に密嵌されたも
のである。 In the embodiment shown in FIG. 1, an axial hole 8 is provided in the center of a tail plug 7 that is fitted to the rear end of a shaft cylinder 6 containing an ink storage body 5, and a hollow tube is formed at the tip of the tail plug 7.
An air pipe 11 provided with a shaped bent portion 9 and with its distal end 10 facing toward the proximal end is housed inside the tail plug, and its proximal end 12 is tightly fitted into the hole 8.

又、第２図に示した別異の実施例は空気パイプ
１１′の形状を除き第１図の実施例と同一構造で
あり、ただ空気パイプ１１′はその先端部に螺旋
状の曲折部９′が設けられておりその先端口１
０′は第１図の実施例と同様基端方向へ向いてい
るものである。 The different embodiment shown in FIG. 2 has the same structure as the embodiment shown in FIG. 1 except for the shape of the air pipe 11', except that the air pipe 11' has a spiral bent part 9 at its tip. ' is provided and its tip opening 1
0' points toward the proximal end, similar to the embodiment shown in FIG.

本考案は以上の様に、空気パイプ即ち空気孔の
空気の流動が曲折部のために押さえられて然もそ
の全体長さも長くなり更にその口径も極めて小さ
くできるのでインキの蒸発防止に極めて有効であ
る。又、その製作も容易で加工上の困難さが解消
される効果がある。更に空気パイプの先端口はイ
ンキ吸蔵体の逆方向へ向いているので落下等の衝
撃によりインキが飛散しても先端口に侵入するこ
とは難しくなり空気パイプが閉塞して筆記不良に
なる欠点も改良される。 As described above, the present invention is extremely effective in preventing ink evaporation because the flow of air in the air pipe, that is, the air hole, is suppressed by the bent portion, and the overall length of the air pipe is lengthened, and its diameter can also be made extremely small. be. Moreover, it is easy to manufacture and has the effect of eliminating processing difficulties. Furthermore, the tip of the air pipe faces in the opposite direction of the ink storage body, so even if ink is scattered due to an impact such as a fall, it is difficult to enter the tip, which can block the air pipe and cause poor writing. Improved.

[Brief explanation of the drawing]

第１図は本考案実施例の縦断面図、第２図は本
考案の別異の実施例の縦断面図、第３図は従来品
の縦断面図である。１……軸筒、２……空気孔、３……中継芯、４
……インキ吸蔵体、５……インキ吸蔵体、６……
軸筒、７……尾栓、８……孔、９，９′………曲
折部、１０，１０′……先端口、１１，１１′……
空気パイプ、１２……基端部。 FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of another embodiment of the invention, and FIG. 3 is a longitudinal sectional view of a conventional product. 1...Shaft cylinder, 2...Air hole, 3...Relay core, 4
...Ink absorber, 5... Ink absorber, 6...
Shaft tube, 7... Tail plug, 8... Hole, 9, 9'... Bent part, 10, 10'... Tip opening, 11, 11'...
Air pipe, 12...base end.

Claims

[Scope of utility model registration request]

In a writing instrument with a built-in ink absorber, the tail plug fitted to the rear end of the barrel has a hole that communicates the inside and outside, and the tip is a hollow thin tube with a bent part at the tip. 1. A writing instrument, characterized in that an air pipe with an air pipe facing toward the proximal end is housed inside the tail plug, and the base end of the air pipe is tightly fitted into the hole of the tail plug.