CN204749649U - Mathematical teaching aid - Google Patents

Abstract

The utility model discloses a mathematical teaching aid, include semi -circular transparent scale board (1) and revolve chi (6), the semi -circular outer fringe of scale plate (1) is carved with the angle groove, engraved on semi -circular face (3) of scale plate (1) multiple geometric figure (8), the straight line of semi -circular transparent scale board (1) appears the outer fringe and is provided with chi groove (2) the centre of a circle department of semi -circular face (3) is provided with semi -circular protruding (4), it is fixed in through pivot (5) to revolve chi (6) on protruding (4). The utility model discloses convenient to use, flexibility.

Description

A kind of mathematics teaching aid

Technical field

The utility model belongs to art of mathematics, particularly a kind of mathematics teaching aid.

Background technology

Class hour in instructors, in order to the content of course can be told about more intuitively, all use some teaching aids, when especially carrying out several teaching or mathematical education, usually ruler will be used, set square and compasses, and at present, these teaching aids are independently individual, the different graphic needing teacher to draw as required during use takes different teaching aids repeatedly, such as when drawing specific angle, teacher needs the one side first drawing angle with ruler usually, the angle that utilization hornwork measures needs afterwards makes a mark, recycle ruler afterwards and complete mapping, complex steps, operation inconvenience, existing drawing tool does not possess measurement function simultaneously, can not the angle of measurement pattern, existing teaching aid uses extremely inconvenience in a word.

Utility model content

For the defect of prior art, the utility model provides a kind of mathematics teaching aid.

A kind of mathematics teaching aid, comprise semi-circle shaped transparent scale plate 1 and revolve chi 6, the semicircle outer rim of described scale plate 1 is carved with angle groove, multiple geometric figure 8 has been engraved in the semicircular plate face 3 of described scale plate 1, the linear outer rim of described semi-circle shaped transparent scale plate 1 is provided with chi groove 2, the circle centre position in described semicircular plate face 3 is provided with semi-cylindrical hill 4, described in revolve chi 6 and be fixed on described protruding 4 by rotating shaft 5.

Optionally, described in revolve chi 6 and comprise shrinkage-rule 7, described shrinkage-rule 7 with revolve chi 6 and be socketed.

Optionally, also comprise ruler 9, described ruler 9 card is put in described chi groove 2.

The beneficial effects of the utility model are: use this teaching aid can the angle of measurement plane figure easily, can also draw required angle easily, for mathematical education provides conveniently.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model mathematics teaching aid;

Fig. 2 is the utility model mathematics teaching aid using state figure.

Detailed description of the invention

For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail detailed description of the invention of the present utility model below in conjunction with accompanying drawing, make above-mentioned and other object of the present utility model, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing in proportion, focus on purport of the present utility model is shown.

As shown in Figure 1, mathematics teaching aid of the present utility model comprises semi-circle shaped transparent scale plate 1 and revolves chi 6, transparent scale plate 1 can be made of plastics, the semicircle outer rim of scale plate 1 is carved with angle groove, multiple geometric figure 8 has been engraved in the semi-circular plate face 3 of scale plate 1, the geometric figure engraved in Fig. 1 comprises equilateral triangle, circle and square, the linear outer rim of described semi-circle shaped transparent scale plate 1 is provided with chi groove 2, the circle centre position in described semi-circular plate face 3 is provided with semi-cylindrical hill 4, described in revolve chi 6 and be fixed on described semi-cylindrical hill 4 by rotating shaft 5.The described chi 6 that revolves comprises shrinkage-rule 7, shrinkage-rule 7 with revolve chi 6 and be socketed, thus shrinkage-rule 7 can be stretched out from revolving chi 6.Can the angle of measurement plane figure by mathematics teaching aid of the present utility model, such as a certain angle that blackboard draws, can by the linear outer rim of scale plate 1 and angle while align, revolve chi 6 to align revolving chi 6 with the another side of angle, then the angle groove revolved indicated by chi 6 is the reading of this angle.Conventional geometric figure can be drawn easily, convenient teaching by the geometric figure engraved.

Refer to Fig. 2, in order to draw the angle of needs, can ruler 9 card be put in chi groove 2, revolve the scale place corresponding to chi 6 to angle, revolve chi 6 like this, angle that ruler 9 just constitutes needs, by chalk along revolving chi 6 and ruler 9 sketches the contours the angle that just can obtain needing.Further, then shrinkage-rule 7 can be stretched out from revolving chi 6 to draw the longer angle of the length of side, thus extend the length of revolving chi 6, be convenient to draw the long angle of larger skirt, shrinkage-rule 7 can be regained to revolve in chi 6 when not using shrinkage-rule 7 or ruler 9 and ruler 9 is taken off, thus reduce the volume of teaching aid, be convenient to deposit.

Set forth a lot of detail in the above description so that fully understand the utility model.But above description is only preferred embodiment of the present utility model, the utility model can be much different from alternate manner described here to implement, and therefore the utility model is not by the disclosed concrete restriction implemented above.Any those skilled in the art are not departing under technical solutions of the utility model ambit simultaneously, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.

Claims (3)

1. a mathematics teaching aid, it is characterized in that comprising semi-circle shaped transparent scale plate (1) and revolving chi (6), the semicircle outer rim of described scale plate (1) is carved with angle groove, multiple geometric figure (8) has been engraved in the semicircular plate face (3) of described scale plate (1), the linear outer rim of described semi-circle shaped transparent scale plate (1) is provided with chi groove (2), the circle centre position of described semicircular plate face (3) is provided with semi-cylindrical hill (4), described in revolve chi (6) and be fixed in described projection (4) by rotating shaft (5).

2. teaching aid according to claim 1, revolves chi (6) and comprises shrinkage-rule (7) described in it is characterized in that, described shrinkage-rule (7) with revolve chi (6) and be socketed.

3. teaching aid according to claim 1, characterized by further comprising ruler (9), and described ruler (9) card is put in described chi groove (2).