CN2338179Y - Multi-functional curve ruler for teaching purpose - Google Patents

Abstract

The utility model discloses a ruler, especially a multifunctional ruler for teaching and drawing, comprising a base ruler which is provided with plane rectangular coordinate systems and spatial rectangular coordinate systems with superimposed origins and X axes. The inner of each coordinate system is provided with the plan figures of a regular triangle, a square, a regular pentagon and a regular hexagon and a spatial visual figure which is arranged horizontally. The intersection positions of the adjacent both sides of the figures are provided with pen inserting holes. The base ruler is also provided with a groove-shaped hole. Both boundary curves of the groove-shaped hole are respectively made into half ellipses. The utility model can be used for conveniently and quickly drawing the solid figures of various polyhedrons and rotators. The utility model has simple structure and artful design and is an ideal drawing tool for teaching in classrooms.

Description

The multifunction teaching drawing ruler

The utility model relates to a kind of ruler, particularly a kind of teaching drawing ruler.

The mapping of solid geometry mainly is to utilize construction with ruler and compasses at present, but this drawing method is complicated, making a secondary figure needs the time longer, and this problem is particularly outstanding during classroom instruction, and using more at teaching process is some regular figures, though teacher draws more skillfully, when using these figures at every turn, all draw also unavoidable a lot of times of waste by making rule map.

The purpose of this utility model is exactly that a kind of multifunction teaching drawing ruler that can make multiple plane and solid figure quickly and easily will be provided.

The utility model adopts technical scheme as described below for achieving the above object: the multifunction teaching drawing ruler at first has a basic chi, on the base chi all overlapping plane right-angle coordinate of initial point and X-axis and rectangular coordinate system in space are arranged, equilateral triangle is arranged in the plane right-angle coordinate, square, regular pentagon and regular hexagon, there is pen plughole at the intersection point place on these adjacent both sides of planar graph, the equilateral triangle that horizontal positioned is arranged in the rectangular coordinate system in space, square, regular pentagon and orthohexagonal space audio-visual picture, there is pen plughole at the intersection point place on these adjacent both sides of audio-visual picture, space, pen plughole allows chalk see through drawing ruler and draw some usefulness on blackboard, therefore the slightly larger in diameter of pen plughole is in the diameter of chalk, and can be designed to inversed taper platform shape, so that make the point that draws accurate as much as possible, on drawing ruler, find corresponding figure during mapping as required, and corresponding point in the pen plughole of its each limit intersection, putting, take down drawing ruler, with the straight line of drawing ruler the point of finishing on the blackboard is coupled together and promptly to obtain needed figure, when making stereogram, perform earlier the space audio-visual picture of upper bottom surface and bottom surface as stated above, and then get final product according to the corresponding relation incline that draws.Also be provided with slotted hole on the base chi, the two edges curve of slotted hole is respectively half ellipse, utilize its various rotary body that can draw easily, for example: circular cone, cylinder, the frustum of a cone and sphere etc., also has one group of concentric semicircular ring on the base chi, between adjacent two semicircular ring is slotted hole, also is carved with angle measuring calibration on the semicircular ring, utilizes it can make things convenient for picture circle and measuring angle.

Adopt the multifunction teaching drawing ruler of this structure to realize that plane right-angle coordinate and rectangular coordinate system in space are overlapping, the planar graph of the horizontal positioned of different size and space audio-visual picture overlaid, figure and drawing tool are overlapping, its design is ingenious, simple in structure, utilize it can make multiple plane and solid figure quickly and easily, in teaching, use and to save the classroom instruction time of a large amount of preciousnesses.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is that basic chi is the structural representation of 30 degree angle right angle triangles.

Fig. 2 is that basic chi is the structural representation of isosceles right angle triangle.

With reference to Fig. 1, Fig. 2.The multifunction teaching drawing ruler has a basic chi, and basic chi can be a pair of a pair of set square of being made up of isosceles right angle triangle 7 and 30 degree angle right angle triangles 1, also can be the strip chi, can certainly adopt the basic chi of other shape.On the 30 degree angle right angle triangles 1 all overlapping plane right-angle coordinate of initial point and X-axis and rectangular coordinate system in space are arranged, equilateral triangle, square, regular pentagon and regular hexagon are arranged in the plane right-angle coordinate, there is pen plughole 2 at the fulcrum place on these adjacent both sides of planar graph, with a kind of figure the different size of size two covers is arranged.Equilateral triangle, square, regular pentagon and orthohexagonal space audio-visual picture that horizontal positioned is arranged in the rectangular coordinate system in space, with a kind of figure two different covers of size are arranged, there is pen plughole 3 at the intersection point place on these adjacent both sides of audio-visual picture, space, pen plughole 2 and 3 slightly larger in diameter are in the diameter of chalk, preferably pen plughole is designed to inversed taper platform shape, the point that draws like this is just more accurate, and the most handy transparent material manufacturing of basic chi is so that can observe situation on the blackboard.On the multifunction teaching drawing ruler, find needed figure during mapping, and corresponding point in the pen plughole of its each limit intersection, putting, with the straight line of drawing ruler the point of finishing on the blackboard is coupled together again and get final product, when making stereogram, according to the height of solid figure two the overlapping plane right-angle coordinates of Y-axis that on blackboard, draw, again the coordinate system on the drawing ruler is overlapped the upper bottom surface and the bottom surface of the solid figure of drawing with two coordinate systems on the blackboard, and then get final product according to the corresponding relation incline that draws, utilize multifunctional drawing ruler can make multiple polyhedron figure rapidly, for example: triangular pyramid, three terrace with edges, square, cuboid ...

Because will be at the plane and the space audio-visual picture of a multiple figure of coordinate system inside-paint, figure is innumerable and disordered, in order to prevent that pen plughole from overlapping, primary plane rectangular coordinate system and rectangular coordinate system in space revolved simultaneously turn 90 degrees, these figures are separately positioned in this two covers coordinate system by kind, simultaneously in order more clearly to tell the various figures on the basic chi, figure is connected pen plughole with the line segment of different colours respectively by kind, kind is that the limit number with figure is a criteria for classification, with equilateral triangle and regular pentagon is example, two planar graphs of equilateral triangle and two space audio-visual pictures are in a cover coordinate system, and use line segment to connect pen plughole with a kind of color, two planar graphs of regular pentagon and two audio-visual pictures then are placed on and revolve in that cover coordinate that turn 90 degrees, and connect pen plughole with the line segment of another kind of color.

Also be provided with one group of concentric semicircular ring 6 on the 30 degree right angle triangles 1, be slotted hole between adjacent two semicircular ring, be carved with angle measuring calibration on the semicircular ring, utilize semicircular ring 6 can draw different semicircle of a plurality of diameters and circle, and utilize it can also measuring angle, also be provided with less circular hole 8 and elliptical aperture 9 on this set square, these holes can be used to the shape of drawing on the one hand, and finger puts in the drawing ruler of can conveniently taking when using in addition.

Isosceles right angle triangle 7 is provided with slotted hole 4 and 10, slotted hole 4 and 10 two edges curve are respectively half ellipses, the ratio of determined ellipse long and short shaft is identical in the slotted hole 4 or 10, but long axis length difference, slotted hole 4 is different with 10 determined ellipse long and short shaft ratios, to adapt to the mapping needs of multiple figure, utilize them can make multiple rotary body figure easily, for example: circular cone, cylinder, the frustum of a cone and sphere.

Also be provided with slotted hole 5 and 11 on the isosceles right angle triangle 7, the two edges curve of slotted hole 5 is respectively parabola and hyperbola, one side slotted hole 11 is straight line, another side is the bigger hyperbola of opening.

Claims (3)

1, a kind of multifunction teaching drawing ruler, it comprises basic chi (1), it is characterized in that: all overlapping plane right-angle coordinate of initial point and X-axis and rectangular coordinate system in space are arranged on the basic chi, equilateral triangle, square, regular pentagon and regular hexagon are arranged in the plane right-angle coordinate, and there is pen plughole (2) at the intersection point place on these adjacent both sides of planar graph; Equilateral triangle, square, regular pentagon and orthohexagonal space audio-visual picture that horizontal positioned is arranged in the rectangular coordinate system in space, there is pen plughole (3) at the intersection point place on these adjacent both sides of audio-visual picture, space, also be provided with slotted hole (4) on the base chi, the two edges curve of slotted hole is respectively half ellipse.

2, multifunction teaching drawing ruler according to claim 1 is characterized in that: also be provided with slotted hole (5) on the basic chi, the two edges curve of slotted hole (5) is respectively parabola and hyperbola.

3, multifunction teaching drawing ruler according to claim 1 is characterized in that: also having one group of concentric semicircular ring (6) on the basic chi, is slotted hole between adjacent two semicircular ring, is carved with angle measuring calibration on the semicircular ring.

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