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Anti-slipping compasses

A compass and circle center technology, applied in the field of anti-skid compasses, can solve the problems of high probability of danger, poor self-protection awareness, and lack of protection at the needle tip.

Inactive Publication Date: 2013-03-20
张承运
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Compass is a tool used to draw circles and arcs in mathematics and drawing. When using a compass, you must first determine the center and radius of the circle in the process of drawing a circle, and then align the end of the leg with the sharp needle on the compass, that is, the needle point, with the center of the circle. , using the pen tip on the other leg as the radius, rotate the compass to draw a complete circle, but the traditional compass is easy to slip during the rotation process. In addition, because the needle point is too sharp and lacks protection, it is often used when storing and carrying the compass. There will be accidents of cutting other objects or stabbing people, and there are certain potential safety hazards, especially for low-grade students, who have poor self-protection awareness and a high probability of danger

Method used

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  • Anti-slipping compasses

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Embodiment Construction

[0008] Such as figure 1 shown. A kind of anti-slip compasses, comprising compasses body, described compasses body is made up of handle 1, left radius outrigger 2, right side radius outrigger 3, pin shaft 4, circle center outrigger 5, fixed post 6, stay cord 7, sliding Ring 8, pen clip 9 and pen 10, the handle 1 is located at the top of the intersection of the left radial leg 2 and the right radial leg 3, and the top of the left radial leg 1 half-wraps the top of the right radial leg 3 , the handle 1 in the center of the junction of the two legs is flat, the joint is provided with a pin 4 connecting the three, the bottom of the handle 1 is connected to the vertically downward center leg 5, and the center leg 5 is located on the left radius leg 2 and the middle of the radius support leg 3 on the right side, the center support leg 5 is a telescopic rod, and the bottom end of the center support leg 5 has a needle, and a sliding ring 8 is movable on the center support leg 5, the r...

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Abstract

The invention relates to a pair of anti-slipping compasses, belonging to the field of school supplies, aiming at solving the problems that the traditional compasses are apt to slip during use, the drawing speed is slow and the type of pens is single. The anti-slipping compasses comprise a compass body. The compass body consists of a handle, a left radius supporting leg, a right radius supporting leg, a pin roll, a circle center supporting leg, fixed columns, pulling ropes, a sliding ring, pen clamps and pens, wherein the circle center supporting leg is arranged in the middle between the left radius supporting leg and the right radius supporting leg, the circle center supporting leg is a retractable rod, the bottom end of the circle center supporting leg is provided with a needle, the pen clamps are respectively installed at the ends of the left radius supporting leg and the right radius supporting leg, and the pens are clamped on the pen clamps. The anti-slipping compasses have the advantages that various pens can be changed to meet drawing demands, the anti-slipping compasses are flexible and convenient to use and the situation of slippery does not occur during drawing.

Description

technical field [0001] The invention relates to a school article, in particular to an anti-slip compasses. Background technique [0002] Compasses are tools used to draw circles and arcs in mathematics and graphics. When using a compass, you must first determine the center and radius of the circle in the process of drawing a circle, and then align the end of the leg with the sharp needle on the compass to the center of the circle. , with the pen tip on the other leg as the radius, rotate the compass to draw a complete circle, but the traditional compass is easy to slip during the rotation process. In addition, because the needle point is too sharp and lacks protection, it is often used when storing and carrying the compass. There will be accidents of cutting other objects or stabbing people, and there are certain safety hazards, especially for low-grade students, who have poor self-protection awareness and a high probability of danger. Contents of the invention [0003] T...

Claims

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Application Information

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IPC IPC(8): B43L9/02
Inventor 张承运
Owner 张承运
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