JPS63134788U

JPS63134788U -

Info

Publication number: JPS63134788U
Application number: JP2762387U
Authority: JP
Priority date: 1987-02-26
Filing date: 1987-02-26
Publication date: 1988-09-05

Description

[Brief explanation of the drawing]

第１図〜第５図は本考案の第１実施例を示して
おり、第１図は筆記具の片半分を外形で示した縦
断面図、第２図は外筒たるキヤツプの縦断面図、
第３図は内筒たる筆記具の先端部の縦断面図、第
４図は第２図―線断面図、第５図は第３図
―線断面図、第６図は嵌合構造の断面説明図、
第７図ａ，ｂは嵌合力を示すグラフ、第８図ａ，
ｂは係合突起と被係合突起との嵌合関係を示す図
表、第９図〜第１１図は第２実施例を示しており
、第９図は筆記具の頭部の縦断面図、第１０図は
ノツクピンの詳細断面図、第１１図はノツクカバ
ーの縦断面図、第１２図ａ，ｂはさらに他の実施
例を示す縦断面図、第１３図ａ，ｂは従来例を示
す説明断面図である。１０…筆記具、２０…軸筒、２０ａ…ノツクピ
ン、２１…筆記体、２２…内挿筒部、２３…係合
突起、２４…間隙、２５…嵌合凹部、３０…キヤ
ツプ、３０ａ…ノツクカバー、３１…クリツプ、
３２…外嵌筒部、３３…被係合突起、３４…間隙
。 Figures 1 to 5 show a first embodiment of the present invention, in which Figure 1 is a vertical sectional view showing the outer shape of one half of the writing instrument, Figure 2 is a vertical sectional view of the cap as the outer cylinder,
Figure 3 is a longitudinal cross-sectional view of the tip of the writing instrument that is the inner cylinder, Figure 4 is a cross-sectional view taken along the line of Figure 2, Figure 5 is a cross-sectional view taken along the line of Figure 3, and Figure 6 is a cross-sectional view of the fitting structure. figure,
Figures 7a and b are graphs showing the fitting force; Figures 8a and 8b are graphs showing the fitting force;
b is a diagram showing the fitting relationship between the engaging protrusion and the engaged protrusion, FIGS. 9 to 11 show the second embodiment, and FIG. 9 is a longitudinal sectional view of the head of the writing instrument; Fig. 10 is a detailed sectional view of the knock pin, Fig. 11 is a longitudinal sectional view of the knock cover, Fig. 12 a and b are longitudinal sectional views showing still another embodiment, and Fig. 13 a and b are explanatory cross sections showing a conventional example It is a diagram. DESCRIPTION OF SYMBOLS 10... Writing implement, 20... Shaft tube, 20a... Knock pin, 21... Cursive body, 22... Insertion tube part, 23... Engagement protrusion, 24... Gap, 25... Fitting recessed part, 30... Cap, 30a... Knock cover, 31 …Clip,
32...Outer fitting cylinder part, 33...Engaged projection, 34...Gap.

Claims

[Claims for Utility Model Registration] In the fitting structure of a writing instrument having an inner tube and an outer tube that can be inserted and removed, an inner tube is formed at the end of the inner tube, and an outer tube is formed at the end of the outer tube. A fitting cylinder part is formed, and one cylinder part is provided with a ring-shaped engagement protrusion that protrudes from its general surface at a corresponding position when the outer fitting cylinder part of the outer cylinder is fitted into the inner cylinder part of the inner cylinder. A fitting recess is formed in the depths of the engaging protrusion, and the other cylindrical part has a height that protrudes from the general surface of the other cylindrical part and is high enough to climb over the engaging protrusion of the one cylindrical part. When the inner cylinder part and the outer cylinder part are fitted with each other by dividing the engaged protrusion into a ring shape and making the rotational positional relationship between the inner cylinder and the outer cylinder different and fitting the inner cylinder part and the outer cylinder part, A fitting structure for a writing instrument, characterized in that each protrusion is divided and arranged to the extent that the protrusion and the engaged protrusion can correspond to each other.