JPH0452096U

JPH0452096U -

Info

Publication number: JPH0452096U
Application number: JP9360290U
Authority: JP
Priority date: 1990-09-07
Filing date: 1990-09-07
Publication date: 1992-05-01

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す断面図、第
２図は第１図の下部芯導入管の上方部分の構造を
示す斜視図、第３図は従来の構造を示す断面図、
第４図は従来の構造の問題点を説明する図。２……切り欠き部、３……実体部、４……上部
平面、５……下部平面、１１……ノツク機構、１
２……芯チヤツク機構、１３……鉛筆芯変位機構
、１５……鉛筆芯、１２３……芯チヤツク部材、
１２４……上部芯導入管、１３１……ゴム環、１
３２……係合スプリング、１３３……下部芯導入
管。なお、各図中同一符号は同一または相当部分
を示すものとする。 FIG. 1 is a sectional view showing an embodiment of this invention, FIG. 2 is a perspective view showing the structure of the upper part of the lower core introducing tube in FIG. 1, and FIG. 3 is a sectional view showing the conventional structure.
FIG. 4 is a diagram explaining the problems of the conventional structure. 2... Notch portion, 3... Real portion, 4... Upper plane, 5... Lower plane, 11... Knock mechanism, 1
2... Lead chuck mechanism, 13... Pencil lead displacement mechanism, 15... Pencil lead, 123... Lead chuck member,
124... Upper core introduction pipe, 131... Rubber ring, 1
32... Engagement spring, 133... Lower core introduction pipe. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of claim for utility model registration] A lead chuck mechanism that grips the upper part of the pencil lead;
A lead tank is provided at the top of this lead chuck mechanism and stores the pencil lead in a state where the pencil lead can fall into the lead chuck mechanism due to its own weight; a pencil lead displacement mechanism that holds the lower part of the pencil lead with a rubber ring; an engagement spring that connects the pencil lead displacement mechanism to the lead chuck mechanism; a knob mechanism that temporarily releases the grip of the pencil lead of the lead chuck mechanism; A first engagement operation in which the engagement spring stretches and pulls out the pencil lead from the lead chuck mechanism by the amount of extension; a direction in which the lower end of the pencil lead displacement mechanism is supported by a stopper and the lead chuck mechanism is pressed toward the stopper; a second engaging action for compressing the engaging spring and pushing the pencil lead downward against the rubber ring; an upper lead introduction tube that holds the pencil lead with an inner tube and has an axis in the same direction as the axis of the pencil lead held by the lead chuck mechanism; configured as an upward extension of the pencil lead displacement mechanism; a lower lead introduction tube having an axis in the same direction as the axis of the upper lead introduction tube and holding a pencil lead by an inner cylinder; a notch provided in the upper part of the lower core introduction tube and formed so as to allow insertion of the opposing portion of the upper core introduction tube; part, set the dimensions of the notch part of the upper core introduction tube and the notch part of the lower core introduction tube, and set the dimensions of the upper core introduction tube and the lower core introduction tube with the engagement spring fully extended. An overlapping portion remains between them, and means for preventing the notch from coming into contact with the opposing portion of the core introduction tube when the engagement spring is in its most compressed state. Pencil pen for recording device.