Compass suitable for blackboard

A compass and blackboard technology, applied in the field of drawing tools, can solve the problems of inconvenient operation and poor drawing aesthetics.

Inactive Publication Date: 2019-01-04
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Circle drawing is often indispensable in teaching. Teachers basically use rough drawing without tools in the teaching process, which will make the drawing less beautiful
The current circle drawing tools used in classrooms on the market are inconvenient to operate and cannot meet the needs of the actual situation

Method used

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  • Compass suitable for blackboard

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Embodiment Construction

[0020] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0021] In the present invention, in the absence of a contrary statement, the orientation words included in the term, such as "upper, lower, top, bottom", etc., only represent the orientation of the term in the normal use state, or are understood by those skilled in the art colloquial term and should not be construed as a limitation of the term.

[0022] see figure 1 , the present invention provides a compass suitable for blackboards, comprising a suction cup 1 and a knob 2 installed in the center of the suction cup 1, one end of a telescopic rod 3 is installed on the top of the knob 2, and the other end of the telescopic rod 3 extends outward and is set There ...

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Abstract

The invention discloses a compass suitable for a blackboard. The compass comprises a sucker (1) and a rotary knob (2) installed at the center of the sucker (1), wherein one end of a telescopic rod (3)is installed at the top end of the rotary knob (2), and the other end of the telescopic rod (3) extends outwards and is provided with a chalk sleeve (4) used for installing chalk. The compass suitable for the blackboard is simple in structure and convenient to use, a user can be efficiently assisted in stably and standardly drawing out a circle on the blackboard, and the time and labor are saved.

Description

technical field [0001] The invention relates to the field of drawing tools, in particular to a compasses suitable for blackboards. Background technique [0002] Circle drawing is often indispensable in teaching. Teachers basically use rough drawing without tools in the teaching process, which will make the drawing less beautiful. The circle-drawing tools used in classrooms on the market are inconvenient to operate and cannot meet the needs of actual conditions. [0003] Therefore, be badly in need of providing a kind of compasses that is simple in structure, easy to use and is applicable to blackboard. Contents of the invention [0004] The object of the present invention is to provide a compass suitable for blackboards, which has a simple structure and is easy to use, and can efficiently assist users to draw circles stably and standardly on the blackboard, saving time and effort. [0005] In order to achieve the above object, the present invention provides a compasses s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L9/02B43L12/00
CPCB43L9/02B43L12/00
Inventor 苗思忠余欢欢韩海东李小亮王淼昕孙奇慧
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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