JPS581591U

JPS581591U - Writing instrument lead fall prevention device

Info

Publication number: JPS581591U
Application number: JP9309281U
Authority: JP
Inventors: 清一小林
Original assignee: 三菱鉛筆株式会社
Priority date: 1981-06-24
Filing date: 1981-06-24
Publication date: 1983-01-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来例のシャープペンシルの後部縦断側面図、
第２図、第４図は本考案に係る筆記具の芯脱落防止装置
を適用したシャープペンシルの後部縦断側面図であり、
・第３図、第５図は回能実施例を適用したシャープペン
シルの後部縦断側面図である。２・・・・・・芯ケースパイプ、９・・・・・・芯規制
部材、１０・・・・・・芯ストッパ一部材、１１．　１
２．　１９・・・・・□・連通ＪＬ１５．１６・・・・
・・芯脱落防止材。Figure 1 is a rear vertical side view of a conventional mechanical pencil.
FIGS. 2 and 4 are rear vertical side views of a mechanical pencil to which the writing instrument lead fall-off prevention device according to the present invention is applied;
・Figures 3 and 5 are rear vertical side views of a mechanical pencil to which the mechanical pencil is applied. 2... Core case pipe, 9... Core regulating member, 10... Core stopper member, 11. 1
2. 19...□・Tsunshu JL15.16...
...Material to prevent core from falling off.

Claims

[Scope of utility model registration request]

(1) Inside the rear end of the core case pipe, a core regulating member and a core stopper member are fixed at a predetermined interval, and a communicating hole through which one or more cores can pass is provided in the center of both members, and these core regulating members are provided. A movable core fall-off prevention member is positioned between the member and the core stopper member, and when the rear end of the core case pipe is facing upward, the communication hole between the core regulating member and the core stopper member is inserted. A writing instrument lead fall prevention device, characterized in that when the rear end of the lead case pipe is directed downward, the lead fall prevention member is movable to prevent the lead from falling off backwards. −
′

(2) The material to prevent the core from falling off is shaped like a ball, and the size is such that it does not interfere with the insertion of the core when the rear end of the core case pipe is facing upward, and the rear end of the core case pipe is facing downward. 2. The device for preventing the lead from falling off for a writing instrument according to claim 1, wherein the device is large enough to close the communication hole of the lead stopper member when the lead stopper is turned on.

(3) A communication hole through which one or more cores can pass is provided in the core fall prevention material, and when the rear end of the core case pipe is facing upward, it communicates with the communication hole of the core regulation member and the core stopper member, and the core When the rear end of the case pipe is directed downward, the communicating hole of the core fall-off prevention member and the communicating holes of the core regulating member and the core stopper member are formed in a sliding piece that is aligned with each other. A writing instrument lead fall-off prevention device as set forth in claim 1 of the patent registration claim.