CN2182068Y - 一种防断活动铅笔 - Google Patents

一种防断活动铅笔 Download PDF

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Publication number
CN2182068Y
CN2182068Y CN 93246228 CN93246228U CN2182068Y CN 2182068 Y CN2182068 Y CN 2182068Y CN 93246228 CN93246228 CN 93246228 CN 93246228 U CN93246228 U CN 93246228U CN 2182068 Y CN2182068 Y CN 2182068Y
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China
Prior art keywords
lead
pencil
metal tube
breaking
propelling pencil
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Expired - Fee Related
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CN 93246228
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English (en)
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杨保和
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Individual
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Priority to CN 93246228 priority Critical patent/CN2182068Y/zh
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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

防断活动铅笔是一种实用新型的书写、绘图工 具。它的主要技术特片是:在护芯管内装有具有阻尼 功能的金属管。揿动笔冒时铅芯不会伸出铅体,能有 效地防止断铅,而且书写方便。

Description

本实用新型涉及一种改进的活动铅笔,特别是一种能够有效地防止断铅的活动铅笔。适合于使用细铅芯。
现有的脉动式活动铅笔端部主要由护芯管、阻尼圈和尖冒组成。市场上出售的活动铅笔就是这种形式。它的主要缺陷是:使用时需多次揿动笔冒,使铅芯露出一定长度才能书写且稍用力不均就会折断。
本实用新型的目的是这样实现的,在活动铅笔的活动护芯管内装一具有阻尼功能的金属管,用金属管的阻尼作用来控制出铅长度,达到防止断铅的目的。
本实用新型的具体结构,由以下的实施例及其附图给出。
图1是本实用新型一种具体结构的纵向剖面图。
图2是图1的A-A剖面图。
参照图1,揿动揿头[5],压缩弹簧[6],使卡头[7]张开,铅芯[3]靠自重落入金属管[1]中。由于金属管[1]前端有三个爪,具有阻尼作用,因此铅芯[3]降至金属管[1]的端部。去掉揿头[5]上的揿动力,在弹簧[6]的作用下使卡头[7]恢复原位并夹紧铅芯[3]。书写时,护芯管[2]在纸面反作用力的作用下,在尖冒[4]内向上滑动。铅芯[3]接触纸面。随着铅芯[3]的磨损,护芯管[2]和金属管[1]逐渐上升,这样铅芯[3]不会因露出过长而折断。

Claims (2)

1、一种由金属管[1]、护芯管[2]、卡头[7]、揿头[5]、弹簧[6]、尖冒[4]和铅芯[3]组成的防断铅笔,其特征是护芯管[2]内装有金属管[1],使用时揿动揿头[5],压缩弹簧[6],卡头[7]张开,铅芯[3]落入金属管[1]中。
2、按权利要求1规定的防断活动铅笔,其特征是在金属管[1]一端有能对铅芯[3]起阻尼作用的三个爪。
CN 93246228 1993-11-22 1993-11-22 一种防断活动铅笔 Expired - Fee Related CN2182068Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 93246228 CN2182068Y (zh) 1993-11-22 1993-11-22 一种防断活动铅笔

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 93246228 CN2182068Y (zh) 1993-11-22 1993-11-22 一种防断活动铅笔

Publications (1)

Publication Number Publication Date
CN2182068Y true CN2182068Y (zh) 1994-11-09

Family

ID=33818977

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 93246228 Expired - Fee Related CN2182068Y (zh) 1993-11-22 1993-11-22 一种防断活动铅笔

Country Status (1)

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CN (1) CN2182068Y (zh)

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