CN2054728U - 省力剪 - Google Patents

省力剪 Download PDF

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Publication number
CN2054728U
CN2054728U CN 89215469 CN89215469U CN2054728U CN 2054728 U CN2054728 U CN 2054728U CN 89215469 CN89215469 CN 89215469 CN 89215469 U CN89215469 U CN 89215469U CN 2054728 U CN2054728 U CN 2054728U
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cutting
cut
opening
clip
angle
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CN 89215469
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王清仁
张兆坤
王宇
王亮
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Individual
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Priority to CN 89215469 priority Critical patent/CN2054728U/zh
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Abstract

一种省力剪,属五金工具类。
该剪由两瓣剪通过偏心铰链连接而成,偏心侧剪口相对其剪柄轴线呈α角度,还配有利于剪口张开的助开弹簧及锁紧装置。操作者用较小的力便能剪断较粗的枝条或钢丝,且不会“打滑”,方便实用,易于批量生产。

Description

本实用新型公开一种省力剪,属五金工具类。
现有的各种手剪,欲剪断被剪物时,往往要施很大的力,有时甚至剪不断,剪切过程中,被剪物易沿轴向滑动,产生“打滑”现象;且每剪一次物件,须用手将两钳口张开一次,颇为不便。
本实用新型提供一种使用者用较小的力便能剪断较硬物件,且不会“打滑”并能自动张开的省力剪。
任务是这样完成的:将两瓣剪连接为一体的铰链3偏心设置,靠偏心铰3一侧剪口相对于其剪柄轴线成α角,α角为5°~10°,偏心侧剪口稍长于另一侧剪口。离偏心铰3一侧介于剪口1与剪柄2间的剪腰部装有助开弹簧4、锁紧销5及保护件6。
其省力的依据如下:设施力者所施垂直于剪柄的力为F手,剪断被剪物所用力为F,F手至铰3中心的距离为D,平行于剪柄2过铰3中心作直线L,过被剪物中心作直线Q垂直于L,则F与Q成α角,设铰3中心至F延长线与L相交处距离为d,α角所对边为d′,则据力矩平衡原理得:F手·D=F·cosα(d-d′)
从而 F= (F手·D)/(cosα(d-d′))
分母为很小数值,分子为较大数值,故F力较大,即在剪口处产生了很大的剪切力,达到本实用新型的预期目的。
下面结合附图给出一个实施例。
图1本实用新型结构示意图
所用材料同一般五金工具用剪,弹簧4应保证剪子能自动张开,锁紧销5及保护件6可用45#钢,α角为5°。偏心侧剪口长于另一侧的长度为在剪口合拢时两者比齐为止。

Claims (3)

1、一种省力剪,包括剪口1、剪柄2,其特征在于:将两瓣剪连接为一体的铰链3偏心设置、靠偏心铰3一侧剪口1相对其剪柄轴线呈α角。
2、据权利要求1所述的省力剪,其特征在于:离偏心铰3一侧介于剪口1与剪柄2间的剪腰部装有助开弹簧4、锁紧销5及保护件6。
3、据权利要求1或2所述的省力剪,其特征在于:所述的α角为5°~10°,靠偏心侧剪口稍长于另一侧剪口。
CN 89215469 1989-08-15 1989-08-15 省力剪 Withdrawn CN2054728U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 89215469 CN2054728U (zh) 1989-08-15 1989-08-15 省力剪

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 89215469 CN2054728U (zh) 1989-08-15 1989-08-15 省力剪

Publications (1)

Publication Number Publication Date
CN2054728U true CN2054728U (zh) 1990-03-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 89215469 Withdrawn CN2054728U (zh) 1989-08-15 1989-08-15 省力剪

Country Status (1)

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CN (1) CN2054728U (zh)

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