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Telescopic compasses

A compass and compass head technology, applied in the field of office supplies, can solve problems such as difficult operation, crooked drawing, uneven force, etc., and achieve the effect of convenient operation

Inactive Publication Date: 2016-03-30
SUZHOU QIYANG IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when using ordinary compasses to draw a circle, you need to hold the head of the compass to rotate and drive the head of the compass to draw a small circle. It is not easy to operate, and it is easy to cause uneven force and crooked drawing.

Method used

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  • Telescopic compasses

Examples

Experimental program
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Effect test

Embodiment

[0016] Such as figure 1 As shown, the telescopic compass of the present embodiment comprises a compass head 1, a fixed foot 2 and a rotating foot 3, one end of the fixed foot 2 is fixed on the compass head 1, and one end of the rotating foot 3 is hinged on the compass head 1, and the rotating foot 3 is retractable and provided with a limit device, the other end of the rotating foot 3 is provided with a lead core 31, and the other end of the fixed foot 2 is provided with a rubber pad 21.

[0017] Rotating pin 3 is divided into upper part and lower part two parts, and upper part is hollow, and one end of lower part is inserted in the upper part and the other end is provided with lead core 31, and upper part lower end is provided with limit nut 33. The other end of the rotating foot 3 is provided with a clamp, one side of the clamp is provided with a clamping nut 32, and the lead core 31 is clamped on the clamp. The compass head 1 and the fixed foot 2 are located on the same st...

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Abstract

The invention relates to a pair of telescopic compasses. The telescopic compasses comprise a compasses head, a fixed leg and a rotating leg, wherein one end of the fixed leg is fixed to the compasses head, one end of the rotating leg is hinged to the compasses head, the rotating leg is telescopic and is provided with a limit device, a pencil lead is arranged at the other end of the rotating leg, and a rubber pad is arranged at the other end of the fixed leg. The compasses are easy to operate.

Description

technical field [0001] The invention relates to a compass and belongs to the technical field of office supplies. Background technique [0002] In mathematics and drawing, a compass is a tool used to draw a circle or a chord, and is often used for drawing with a ruler. The compass is usually made of metal, with two feet, the upper end is hinged, and the lower end can be separated or closed at will to adjust the radius of the arc drawn. The end of one foot is a needle point, and the end of the other foot can be Load pencil or ink lines. [0003] But when using ordinary compasses to draw a circle, you need to hold the compass head to rotate and drive the compass head to draw a small circle, which is not easy to operate, and it is easy to cause uneven force and crooked drawing. Contents of the invention [0004] The technical problem to be solved by the invention is to propose an easy-to-operate compass aiming at the deficiencies of the prior art. [0005] The technical sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L9/02
CPCB43L9/02
Inventor 姚多妹林燕
Owner SUZHOU QIYANG IND & TRADE
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