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实用新型
CN209395474U 一种可画任意圆心角圆弧的圆规 失效 - 权利终止

一种可画任意圆心角圆弧的圆规
摘要：
本实用新型公开了一种可画任意圆心角圆弧的圆规，其包括第一圆规脚和第二圆规脚，第一圆规脚与第二圆规脚活动连接，第一圆规脚上设置有旋转圆球，旋转圆球上套设有与其间隙配合的圆球套，圆球套上连接有的支撑杆上设置有吸盘；圆球套的端面上设置有刻度线，连接杆与套设在支撑杆上的环形套连接；第一圆规脚上设置有滑块，滑块与度量尺之间活动连接有伸缩杆；第二圆规脚上固定设置有画笔。本实用新型设计合理，结构简单，画图者在实现画圆弧的同时，可通过刻度尺来度量所画圆弧的圆心角，进而可实现画任意圆心角的圆弧，有效减少了画图者的工作难度和减少画图时间，增加画圆弧的精确度。
摘要（英）：

The utility model discloses a pair of compasses capable of drawing any central angle arc, which comprises a first compasses leg and a second compasses leg, the first compasses leg is movably connected with the second compasses leg, a rotary ball is arranged on the first compasses leg, a ball sleeve in clearance fit with the rotary ball is sleeved on the rotary ball, and a sucker is arranged on a support rod connected onto the ball sleeve; scale marks are arranged on the end face of the ball sleeve, and the connecting rod is connected with an annular sleeve arranged on the supporting rod in a sleeving mode. A sliding block is arranged on the first compass leg, and a telescopic rod is movably connected between the sliding block and the measuring ruler; and a painting brush is fixedly arranged on the second compass leg. The circular arc drawing ruler is reasonable in design and simple in structure, a drawing person can measure the central angle of a drawn circular arc through the dividing ruler while drawing the circular arc, then the circular arc with any central angle can be drawn, the working difficulty of the drawing person is effectively reduced, the drawing time is shortened, and the circular arc drawing accuracy is improved.

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