CN2471557Y

CN2471557Y - Multifunctional drawing instrument for teaching

Info

Publication number: CN2471557Y
Application number: CN 01214317
Authority: CN
Inventors: 马兴乾
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-26
Filing date: 2001-02-26
Publication date: 2002-01-16
Anticipated expiration: 2011-02-26

Abstract

The utility model relates to a geometrical plotting device, comprising two long rulers, which is characterized in that one end of a ruler is hinged with one end of the other ruler while a rotary pivot or a point is arranged on the other end; a protractor adopts the first long ruler as the hemline and an off ellipse is arranged on the panel of the protractor; a ruler chain is hinged near the lengthways middle of the hemline, wherein the ruler chain is formed by at least two shorter rulers which are hinged with each other end to end; symmetrically a ruler chain is hinged near the end of the other long ruler where a rotary pivot or a point is arranged, wherein the ruler chain is formed by at least two shorter rulers which are hinged with each other end to end. Compared with the prior art, the utility model has the advantages that the device can effectively draw different perplexing figures on the blackboard.

Description

The multipurpose educational plotter

The utility model relates to the Geometric figure drawing instrument, particularly a kind of Foldable cellular multipurpose educational plotter.

The teacher draws on blackboard, existing single ruler, T shape chi, set square, compasses, the protractor etc. of using mostly, and inconvenience is carried and is hung, inefficiency when particularly drawing than complex geometry, the teacher bears heavy and delays the valuable classroom instruction time.Notification number is that the Chinese patent file of CN_2216930Y has been announced a kind of " collapsible geometric ruler " that supplies mathematical education to use, by three have U-shaped or L shaped cross section, the straight-bar of edge cover is hinged in twos each other constitutes, claim to have the function of set square, ruler, compasses, protractor and teacher's pointer by adjusting its relative position.But if install comparatively complicated figure such as picture ellipse, rectangle, polygon with this, it is low that efficient still shows.

The purpose of this utility model provides a kind ofly not only can be used as set square, ruler, compasses, protractor, and the multiple multipurpose educational plotters than complex figure such as ellipse, rectangle, polygon that can draw on blackboard to quickness and high efficiency.

Structure of the present utility model is: two ends than long ruler are hinged and the other end is respectively established a pivot point or nib, one protractor is its base with article one than long ruler, have on the panel of this protractor be hinged with near the longitudinal middle part of cutting empty oval and its base one by 2 joints or 2 joints above than short ruler be hinged from beginning to end the ruler chain that forms, in also being hinged with one near another another side that is provided with a pivot point or a written end than long ruler by 2 joints or the ruler chain that is hinged from beginning to end and forms than short ruler more than 2 joints.

For square, rectangle, rectangle, rhombus, regular pentagon, the regular hexagon etc. of on blackboard, drawing to quickness and high efficiency, preferably near the longitudinal middle part of protractor base hinged ruler chain by 5 joints than short ruler constitute, another ruler chain is made of than short ruler 3 joints, and each ruler equal in length in each ruler chain.

For ease of using, in the said ruler one, many or all preferably be provided with scale.

Said pivot point can be thimble, rubber small sucker or small magnet piece (being used for steel blackboard or blank) or the like.

Said nib can be chalk, pastel pencil etc.

Cut the empty ellipse except that having on the protractor panel, also can have and cut other empty figures, but oval for guaranteeing oval area, preferably only have to cut sky.

Can make compasses than long ruler for two that an end is hinged in the utility model and use, protractor can be measured the angle of 0 degree-180 degree.Ellipse on the protractor panel can be drawn ellipse, and said two ruler chains can fold as required and are combined into various states, thereby can draw on blackboard to quickness and high efficiency ellipse, rectangle, polygon etc. are multiple than complex figure.Especially, if near the longitudinal middle part of protractor base hinged ruler chain constitute than short ruler by 5 joints, and another ruler chain is made of than short ruler 3 joints, then can draw triangle, square, regular pentagon, rhombus, rectangle, parallelogram etc. fast.Compasses itself cooperate ruler, protractor can draw fan-shaped.The utility model also can be worked as T shape chi and be used.

The utlity model has the function of compasses, protractor, ruler, set square, T shape chi, can draw various polygons as square, rectangle, triangle, rectangle, rhombus, regular pentagon, regular hexagon and ellipse, circle etc., heavy mutually after the two ruler chain foldings with compass shaft, the compasses diaxon closes up and can be convenient for carrying and use, its one-object-many-purposes, particularly can draw multiple on blackboard to quickness and high efficiency be the unexistent remarkable advantage of prior art than complex figure.

Fig. 1 closes up view for embodiment is folding.

Fig. 2 is the deployed condition schematic diagram of embodiment.

User mode schematic diagram when Fig. 3 draws square for embodiment.

Fig. 4 is the user mode schematic diagram when rectangular for embodiment draws.

Fig. 5 draws the time user mode schematic diagram of right angled triangle for embodiment.

User mode schematic diagram when Fig. 6 draws rhombus for embodiment.

User mode schematic diagram when Fig. 7 draws quadrangle for embodiment.

User mode schematic diagram when Fig. 8 draws regular pentagon for embodiment.

User mode schematic diagram when Fig. 9 draws regular hexagon for embodiment.

User mode schematic diagram when Figure 10 draws equilateral triangle for embodiment.

Embodiment: see Fig. 1-10.End than long ruler 1 and 2 is hinged by bolt 9, the fastening thimble 3 of ruler 1 other end, the fastening chalk head 4 of ruler 2 other ends.Protractor 5 is its base with ruler 1.Have on the panel of protractor 5 cut empty oval 6 and the longitudinal middle part on its base be hinged with one by short and isometric mutually ruler 7 head and the tail of 5 joints be hinged the ruler chain that forms, be hinged with a ruler chain that is hinged and forms by short and isometric mutually ruler 8 head and the tail of 3 joints in another side near ruler 2 fastening chalk head 4 one ends.Whole scales that are equipped with in the said ruler.10 is rivet among the figure.Protractor 5 and each ruler are made by multi-layer sheet.Ruler 1 and 2 length are 48 centimetres, and the length of ruler 7 is 23 centimetres, and the length of ruler 8 is 32.5 centimetres.

The utility model is not limited thereto embodiment.

Claims

1, a kind of multipurpose educational plotter, it is characterized in that: two ends than long ruler are hinged and the other end is respectively established a pivot point or nib, one protractor is its base with article one than long ruler, have on the panel of this protractor be hinged with near the longitudinal middle part of cutting empty oval and its base one by 2 joints or 2 joints above than short ruler be hinged from beginning to end the ruler chain that forms, in also being hinged with one near another another side that is provided with a pivot point or a written end than long ruler by 2 joints or the ruler chain that is hinged from beginning to end and forms than short ruler more than 2 joints.

2, as the said multipurpose educational plotter of claim 1, it is characterized in that: near the longitudinal middle part of protractor base hinged ruler chain by 5 joints than short ruler constitute, another ruler chain is made of than short ruler 3 joints, and each ruler equal in length in each ruler chain.

3, as the said multipurpose educational plotter of claim 2, it is characterized in that: the end than long ruler (1) and (2) is hinged by bolt (9), the fastening thimble of ruler (1) other end (3), the fastening chalk head (4) of ruler (2) other end, the whole scales that are equipped with in the said ruler.