CN2038058U - Multi-function drawing board for plane geometry, solid geometry and axonometrical drawing - Google Patents

Abstract

The utility model discloses a multi-function drawing board for plane geometry, solid geometry and axonometrical drawing, which is a multi-function rapid drawing tool and is particular designed for the university student, the high school student, the pupil to learn the mathematics. The utility model organically combines a straightedge, a set square, a protractor, a compasses, a T-square, an axisymmetrical ruler and a central symmetry ruler, which can draw the common patterns of the plane geometry, the total patterns of the textbook of the solid geometry, the various symmetrical curves and the views of the analytic geometry and the triangle and the various axonometrical drawings and can solve the drawing of the basic drawing and the drawing with ruler and compasses of the plane geometry. The function of the drawing board is complete, the utility model can be used to do the drawing rapidly and accurately, and the performance is good. The utility model has the advantages of convenient operation, wide purpose and is an optimum friend of the university student, the high school student and the pupil, and the multi-function drawing board for plane geometry, solid geometry and axonometrical drawing is suitable for the designing, the drawing and the aspect of enlightening the abilities of the children recognizing and drawing the drawing.

Description

Multi-function drawing board for plane geometry, solid geometry and axonometrical drawing

The utility model is to aim at pupils and students' learning mathematics and the global function QuickDraw instrument that designs, is the improvement that belongs to existing drawing instrument.

Draw mathematic graph, generally need many tool sets, carry inconvenience, existing mathematics drawing board, function is limited, and application surface is narrow, solve the drafting of basic mapping, construction with ruler and compasses and the axonometric drawing of bad plane geometry, and the plate face is big, generally can not be contained in the writing case.

The purpose of this utility model is that the interaxial angle of ruler, protractor, compasses, various axonometric drawings, T-square, axial symmetry chi, center symmetric ruler are organically combined, for pupils and students provide a kind of can draw common figure in the plane geometry, and construction with ruler and compasses solid geometry in whole figures, analytic geometry and triangle in various symmetrical curves, view and various axonometric drawing, and can draw basic mapping in the plane geometry, multiple functional, easy to use, mapping quick and precisely, and plate face I is contained in the novel drawing instrument in the plastic writing case.

The utility model is to utilize the empty frame of multiple shape designed on the chart board and can determine the line chart frame, T-square, axial symmetry chi, center symmetric ruler on summit and one one end is that fine rule that a porose thin transparent is moulded sheet is finished all functions of mapping substantially in the mathematics teaching material, in fact its whole technical solutions and constituted mode are exactly the concrete structure shown in attached picture in picture one (vertical view of drawing board), describe structural design provided by the utility model and function in detail below in conjunction with figure one:

This drawing board be with thick be that 0.5 to 1.5mm transparent material is made, specification is that 15.6cm takes advantage of high 7.9cm to take advantage of the high 3.35cm in limit; The angle of two edge lines in top is 120 degree, and this bisector of angle also is the axis of chart board, and these three lines can be used as just to wait surveys the axle survey line, is used for drawing equal axes axonometric drawing.

Two edge line positions, chart board top, intersection point with them is a starting point, it is the symmetrical scale of least unit that mm is arranged respectively, has just constituted the axial symmetry chi of chart board together with the axis, can draw the symmetric points (figure) of known point (figure) about certain straight line symmetry.Also can be used to the perpendicular bisector (seeing figure three) making any bisector of angle (seeing figure two) and make any line segment, drawing the length of side is the positive triangle and the regular hexagon of sizing.

Axis in the chart board is vertical with chart board lower edge line, and these two lines constitute the T-square of chart board, can draw a bit vertical with the known straight line straight line that runs through; With the intersection point is starting point, having with mm at position, the chart board lower edge line left and right sides is the symmetrical scale of least unit, the lower edge line just constitutes the center symmetric ruler of chart board like this, can draw the center symmetric points (figure) of point (figure), but and the distance of measurement point that combine with T-square to straight line, draw rectangular coordinate system, cross straight line and make this PAR (seeing figure four) etc. more outward.

Free frame (9) is arranged at the interior top, axis of this drawing board is a rhombus; The middle part is free frame (1) to be made of a plurality of concentric semicircles, inner orthohexagonal three limits of the circle that differs in size and radius thereof are contained in inside, the circle centre position perforation, maximum half rounded edge place has from 0 to be spent to the protractor graduation mark of 180 degree, can draw the circle and concentric circles and the inscribed regular hexagon that differ in size, and can determine the equilateral triangle, the isosceles trapezoid that differ in size according to the wire frame of inside.The angle of surveying or drawing certain number of degrees with protractor.

It is that sideline by square and rectangle is constituted that free frame (8) is arranged on this chart board, and an empty frame of circle is arranged in the square, can draw rectangle and square etc.

Free frame (6), (7) are arranged on this chart board, they are made of the audio-visual picture of bottom surface vertical view on the audio-visual picture of the last bottom surface vertical view of positive truncated rectangular pyramids and positive six terrace with edges respectively, all bore a hole in the center, utilize they can draw plane and parallelogram and positive four and positive hexagonal pyramid, post, stage body (height can arbitrarily)).

Positive three the terrace with edges up and down audio-visual picture (4) of bottom surface vertical view and the audio-visual picture (5) of regular pentagon are arranged on this chart board, all bore a hole in their summit (removing 2 points on the horizontal line) and center, utilize them can draw positive triangular pyramid, post, stage body and positive pentagonal pyramid, cylinder, height can be decided arbitrarily.

It is to be made of a plurality of oval institutes of survey that just waiting with one heart that contain 240 degree that free frame (2) is arranged on this chart board, and conjugate value is arranged, and length axis and central point can be drawn the circular cone, post, the stage body that differ in size, and height can be decided arbitrarily.

Have oblique two to survey oval empty frame (11) on this chart board, can cooperate picture segment, spherical crown etc. with circle.

Free frame (3) is arranged on this chart board, and two the long edge line angles in its top are 135 degree, and wherein the vertical horizontal line that can be considered with the axis in the top is used for drawing oblique two and surveys axonometric drawing; Two long edge lines are positive two inclined shaft surveys line below the empty frame, and their angle is that 180 degree subtract arcsin 3/4ths, and wherein one of below is arcsin 1/8th with the horizontal line angle of cut, can be used to draw accurate positive two mappings.

Regular pentagon picture frame (10) is arranged on this chart board, the perforation of place, summit, an empty frame of concentric little regular pentagon is contained in inside, can draw regular pentagon and positive five-pointed star.

(12) to locate be that aperture is the perforation of 0.5mm on this chart board, can be into a fine rule (13), and the fine rule other end is that a thin transparent is moulded sheet (14), for a short time moulding has perforation in addition on the sheet, the aperture is 1mm, can insert nib, constitute simple and easy compasses, can solve the needs of construction with ruler and compasses.

In addition, according to said tens perforation on this chart board, also can draw a plurality of differ in size decide circle.

Attached picture in picture one is the vertical view of this drawing board, the position dimension of its size and each several part is all with in kind identical, draw oblique dotted portion among the figure and represent that control is empty, to bore a hole in the real point position, general aperture is 1mm, figure two makes any bisector of angle figure, and figure three is the perpendicular bisector figure that make any line segment, and figure four was that straight line is made this PAR (or vertical line) figure more outward.

According to figure one to figure four,, further specify advantage of the present utility model and good effect below to the analysis of the basic drawing method of several geometry:

Draw any bisector of angle (figure two): make axis in the chart board must cross the summit 2 at angle 2 as figure, swinging chart board then makes the both sides at angle 2 respectively by till the scale identical on the symmetric ruler, at place, chart board summit plotted point 1, ray 21 is the bisector at angle 2 so.

Draw the perpendicular bisector (figure three) of any line segment: as figure swing chart board, two end points 2 of line segment and 3 are in respectively on the symmetric ruler till the identical scale place, mark chart board summit 1 then and utilize empty frame to mark 1: 4 on the axis, straight line 14 is the perpendicular bisector of line segment 33 so.

Cross outer strokes and dots this PAR (four) of straight line: measure a little 3 distances that arrive straight line 12 as figure with chart board, determine the point 4 identical with last distance along straight line 12 translation chart boards, straight line 34 was a little 3 straight lines parallel with straight line 12 so.

By above explanation, be not difficult to find out that this drawing board is except that drawing function is complete, adopt concentric locking collar circule method principle to design empty frame in design and as often as possible and can determine the line chart frame on summit, given full play to the efficient of chart board unit are, the little drawing amount of plate face is many, and drawing various orthopyramids, post, can both easily determine the bottom center position during stage body figures, because accurate positioning has brought convenience to drawing, these all are to be better than other similar drawing board part, this drawing board is pupils and students' best beneficial friend still not, but also being suitable for technological innovation personnel design drawing and initiation children's intelligence picture aspect, purposes and application surface are extensive.

Claims (1)

1. Plane geometry, solid geometry, axonometric drawing multipotency drawing board are the drawing instruments made from transparent material hereinafter to be referred as the multipotency drawing board, it is characterized in that:

   Two the edge line angles in multipotency drawing board top are 120 °, with the angle summit is starting point, being carved with respectively with mm on these two edge lines is the symmetrical scale of least unit, the bisector of angle is perpendicular to the lower edge line, to be starting point with the intersection point be carved with respectively with mm about on the lower edge line is the symmetrical scale of least unit

   Free frame (1) is arranged on the multipotency drawing board, be made of a plurality of concentric semicircles, be carved with the protractor scale from 0 ° to 180 ° on its outer edges, orthohexagonal three sidelines of the inscribed that differs in size are contained in inside, the circle centre position perforation,

   Free frame (2) is arranged on the multipotency drawing board, is constituted by a plurality of survey concentration ellipses that just wait that contain 240 °, and can demonstrate conjugate value and length axis and center,

   Free frame (3) is arranged on the multipotency drawing board, and two the long edge line angles in top are 135 °, and two the long edge line angles in bottom are 180 °-arcsin3/4, and wherein the angle of lower-most edge line and topmost horizontal edge line is arcsin1/8,

   Free frame (6), (7) are arranged on the multipotency drawing board, they be respectively by go to the bottom on the positive truncated rectangular pyramids and positive six terrace with edges on the go to the bottom audio-visual picture sideline of vertical view constituted, the center perforation,

   Picture frame (4), (5) are arranged on the multipotency drawing board, and they are respectively the audio-visual picture of end vertical view about positive three terrace with edges and the audio-visual picture of regular pentagon vertical view, summit and center perforation,

   Free frame (8) is arranged on the multipotency drawing board, is constituted by square and rectangle sideline,

   Picture frame (10) is arranged on the multipotency drawing board, and it is made up of a regular pentagon and diagonal, the perforation of place, summit, and an empty frame of little square is contained in inside.