Combined type primary school mathematics teaching ruler

组合式小学数学教学尺

  • Inventors: QI JUNHONG
  • Assignees: 亓俊红
  • Publication Date: September 21, 2011
  • Publication Number: CN-201979927-U

Abstract

本实用新型公开了一种组合式小学数学教学尺,由量角器(1)构成,其特征在于:在量角器(1)的圆心部位设有转轴(2),在转轴(2)上设有角度指示旋转针(3),在角度指示旋转针(3)的前端设有红光发射装置,在量角器(1)的左边角部通过销轴(4)固定上旋转直尺(5)。该组合式小学数学教学尺,由于在角度指示旋转针的前端部设置有红光发射装置,所以可使测量角度清楚、醒目,便于学生观看、学习,提高了学生的学习效率,同时还可以利用其画直线等,避免老师在绘图时不停地更换教具,能够提高作图速度和教学效率,便于教师教学使用。
The utility model discloses a combined type primary school mathematics teaching ruler, which comprises a protractor (1) and is characterized in that the position of the centre of a circle of the protractor (1) is provided with a rotating shaft (2); the rotating shaft (2) is provided with an angle display rotary needle (3); the front end of the angle display rotary needle (3) is provided with a red light emission device; and an upper rotary ruler (5) is fixed at the corner at the left side of the protractor (1) through a pin shaft (4). In the combined type primary school mathematics teaching ruler, as the front end of the angle display rotary needle is provided with the red light emission device, a measurement angle can be clear and striking, so that students can conveniently watch and learn, and the learning efficiency of the students is improved; and simultaneously, the combined type primary school mathematics teaching ruler can also be utilized to describe straight lines and the like so as to avoid the phenomenon that training aids are replaced without stop when a teacher draws. The combined type primary school mathematics teaching ruler is capable of improving the drawing speed and the teaching efficiency and is convenient for the teacher in teaching.

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