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Compasses special for teachers

A compass and teacher's technology, which is applied to circular curve plotters, printing, writing utensils, etc., can solve problems such as affecting the efficiency of class, slow circle drawing, inconvenient erasing, etc., and achieve good practical application value and promotion value. The effect of high efficiency and fast circle drawing speed

Inactive Publication Date: 2015-03-25
张敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the teacher writes and draws circles on the blackboard with the existing compasses, since the fixed end of the compass is a tip, when it is positioned and rotated around the axis, the tip will always be a little unstable, and even slip a certain distance, which is easy to make the circle The drawing is not standard or beautiful, and the speed of drawing circles is slow, which affects the efficiency of class; in addition, when the circles drawn do not meet the requirements or are drawn incorrectly, it is not easy to erase and modify them in time, which brings a lot of inconvenience to teachers.

Method used

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  • Compasses special for teachers

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0017] Such as figure 1 As shown, this teacher-specific compass includes

[0018] Compasses 5, its tip is connected with the suction cup 6 that is used to suck compasses 5 on the blackboard;

[0019] The connecting rod 2 is connected to the compasses 5 through a universal connector, and a groove is formed on its outer side;

[0020] The wiper block 1 is arranged on the upper end of the connecting rod 2;

[0021] The chalk fixed bin 3 is arranged at the lower end of the connecting rod 2; and

[0022] Ruler 4 is stuck in the groove of connecting rod 2.

[0023] Connecting rod 2 is rectangular parallelepiped.

[0024] The above-mentioned specific embodiments are only specific cases of the present invention. The scope of patent protection of the presen...

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Abstract

The invention relates to compasses special for teachers. Circles which are drawn by the existing compasses are not standard and beautiful, and the circle drawing speed is relatively slow, and the teaching efficiency is effected; moreover when the drawn circles do not comply with the requirements or are wrong, the circles are not convenient to timely erase and modify and thus a lot of inconvenience is brought to teacher's teaching. The compasses special for teachers comprise a compass with a tip connected with a suction disk which can suck the compasses on a blackboard; a connection rod which is connected with the compass by an universal connection piece, wherein a groove is formed on the outer side of the connection rod; an eraser block which is arranged on the upper end of the connection rod; a chalk fixation bin which is arranged on the lower end of the connection rod; and a ruler which is chucked in the groove of the connection rod. The connection rod is cylindrical or rectangular shape. The compasses are scientifically designed and convenient to use, the circles drawn by the compasses are standard and beautiful, the circle drawing speed is relatively quick, the teaching efficiency is high; moreover the drawn circles which do not comply with the requirements or are wrong can be convenient to timely erase and modify, and a lot of convenience is brought to teacher's teaching.

Description

technical field [0001] The invention relates to a compass, in particular to a special compass for teachers. Background technique [0002] When the teacher writes and draws circles on the blackboard with the existing compasses, since the fixed end of the compass is a tip, when it is positioned and rotated around the axis, the tip will always be a little unstable, and even slip a certain distance, which is easy to make the circle The drawing is not standard or beautiful, and the speed of drawing circles is slow, which affects the efficiency of class. In addition, when the drawn circles do not meet the requirements or are drawn incorrectly, it is not easy to erase and modify them in time, which brings a lot of inconvenience to teachers. Contents of the invention [0003] The technical problem to be solved by the present invention is how to overcome the above-mentioned defects of the prior art, and provide a special compass for teachers. Erase and timely modify circles that a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L9/04
CPCB43L9/04
Inventor 张敏
Owner 张敏
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