CN87204750U

CN87204750U - Combined demonstration device of space geometry

Info

Publication number: CN87204750U
Application number: CN 87204750
Authority: CN
Inventors: 李富昌; 蒋凤仪
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-11-09
Filing date: 1987-11-09
Publication date: 1988-08-10

Abstract

The utility model relates to a combined demonstration device of space geometry. The well known products exist the problems that the figure of the demonstration is difficult to see clear, the function of the demonstration is limited, etc. The combined demonstration device of space geometry of the utility model is composed of a soleplate, pull rods and joints of the pull rods. The space figures are demonstrated through the mutual split joint of the pull rods and the insertion and the installation of the pull rods on the bottom plate. The utility model can demonstrate the space states of the figures, such as space points, lines, surfaces, curved faces, spherical surfaces, convolution bodies, etc., the projections of the figures can be demonstrated by the utility model being cooperated with the projection screen and the light. The combined demonstration device of space geometry can be used for the teaching demonstration of the space geometry.

Description

Combined demonstration device of space geometry

The utility model relates to a kind of combined type space geometry apparatus for demonstrating, and it belongs to the several teaching model class.

The teaching demonstration of solid geometry, how much of space analysis, spherical geometry and descriptive geometry, usual way are to utilize fixed model, because the form of fixed model fixes, so quantity is many, carry and take care of very bothersome, and the while buying expenses is big.The disclosed a kind of solid geometry demonstrating models of using of CN85200559 more, though than fixed model for well, but still there is the problem of following several respects: the one, figure is demonstrated in the cube capsule, even being colourless transparent material, makes box body, so clear not as directly seeing after all, particularly cube capsule box body by stained situation under, the dysopia that causes to the people is just more serious, the figure of demonstration is difficult to see clearly, says nothing of with light, projection screen to have cooperated the projection of Presentation Graphics; The 2nd, the line segment of demonstration must be limited to the demo function of model by the hole on the cube capsule, such as the situation of two line segments that are difficult to that one is long and the other is short on the same straight line of presentation space; Three inserted sheets that are to use can't break away from the bottom of the box, thus can not optional position, presentation space plane, and with positive triangular pyramid box demonstration polyhedron, the face angle that demonstration is come out is fixed, and not have the situation of variation, and can not demonstrate recessed polyhedral angle simultaneously; The 4th, can only demonstrate two kinds of regular hexahedron and regular octahedrons in the regular polygon, also can't demonstrate space curved surface in addition.

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of novel combined type space geometry apparatus for demonstrating is provided.

Main points of the present utility model are that combined type space geometry apparatus for demonstrating of the present utility model is made of base plate 1 and some pull bars, rod head.The utility model comes the presentation space figure by the mutual splicing between pull bar, thereby has overcome problems of the prior art effectively.The mutual splicing of pull bar described in the utility model and with being connected of base plate 1, can adopt the mode of plug-in mounting.Also can adopt the mode that is threaded.In the previous case, as long as on rod head and base plate 1, be provided with and the corresponding to plug-in opening of pull bar.Under latter event, screw thread is set at the pull bar two ends, on rod head and base plate 1, the respective threads hole is set simultaneously.Plug-in opening or threaded hole on the described base plate 1 can be by unit head in length and breadth uniformly at intervals on base plates 1, described rod head comprise be used for pull bar in the same way with fixture splice 2 connected vertically and be used for pull bar non-in the same way with articulation 3 connected vertically.Described fixture splice 2 can be the cubic block that has plug-in opening or threaded hole on six, described articulation 3 is made of a strand 4 of living, the strand of living 5 and pole 6, a described strand 4 of living, the strand of living 5 respectively by the cardan axle hinge joint at pole 6 two ends, can swing around cardan axle, and described strand alive is propped up on 4 and is had suit hole 7, and the described strand of living is propped up plug-in opening or the threaded hole 8 that has on 5 for the pull bar connection.Pull bar of the present utility model is a kind of telescopic lever 9 of vary in length preferably, and this telescopic lever 9 can be socketed to form by big sleeve pipe 10 and small casing 11, and when employing was threaded, the non-socket end of big sleeve pipe 10 and small casing 11 should be provided with screw thread.Use for convenience in addition, the steady brace that some have regular length can also be set, be provided with at the pull bar two ends under the situation of screw thread, for the needs that connect, thread rotary orientation that should some steady brace two ends is different, at this moment, the fixture splice 2 that to have four threaded holes on the face at least on a part of six be left-hand thread also should be set.

The utility model generally can the presentation space arbitrfary point and the position of line segment arbitrarily, can also demonstrate the situation that the prolongation of line segment and it and line are intersected, be used with gelatin foil (or scraps of paper) simultaneously, but the situation of presentation space arbitrary plane and Plane intersects, also can demonstrate for basic revolution in some space geometries and space curved surface commonly used, in addition, the utility model is equipped with all right presentation space curve of soft metal silk, be equipped with hemisphere face again, then can both demonstrate for Xiang Guandian that asks solid of revolution with the sphere method and spherical trigonometry etc.

Accompanying drawing 1 is the utility model embodiment user mode figure.

Accompanying drawing 2 is the utility model articulation 3 structural representations.

Accompanying drawing 3 is the utility model embodiment telescopic lever 9 structural drawing.

Accompanying drawing 4 is the utility model embodiment hemisphere face 16 vertical views.

Accompanying drawing 5 is the utility model embodiment hemisphere face 16A-A cut-open views.

The utility model is described in further detail below with reference to embodiment and accompanying drawing thereof.

Embodiment:

As shown in Figure 1, the combined type space geometry apparatus for demonstrating of present embodiment is made of base plate 1, fixture splice 2, articulation 3, telescopic lever 9.Described base plate 1 can be used the transparent material manufacturing, and outward appearance is a square, by unit head threaded hole 13 is arranged uniformly at intervals in length and breadth on it; Described fixture splice 2 is a cubic block, has threaded hole on its six; Described articulation 3 as shown in Figure 2, it is made of a strand 4 of living, the strand of living 5 and pole 6, and a described strand 4 of living, the strand of living 5 respectively by the cardan axle hinge joint at pole 6 two ends, can swing around cardan axle.Strand alive is in addition propped up on 4 and is had suit hole 7, and the strand of living is propped up on 5 and had threaded hole 8; Described telescopic lever 9 as shown in Figure 3, it is socketed to form by big sleeve pipe 10 and small casing 11, small casing 11 can stretch in big sleeve pipe 10 and rotate, the mutual alignment of big in case of necessity sleeve pipe 10 and small casing 11 can be fixing by screw 19, and the non-socket end of in addition big sleeve pipe 10 and small casing 11 is connected with threaded

joint

14 and 15 respectively.Described

joint

14 and 15 diameter are consistent with the diameter of big sleeve pipe 10; What accompanying drawing 4, accompanying drawing 5 were showed is the hemisphere face 16 that present embodiment sets, it is made by transparent material, be evenly equipped with three threaded holes that are connected with pull bar 17 on the sphere, use the fashionable dress upper connecting rod hemisphere face 16 can be fixed in a certain position, certainly, when whole device adopts plug-in mounting to connect, offer plug-in opening on the sphere and got final product.

Mutual splicing between the present embodiment pull bar can be carried out with reference to accompanying drawing 1.Wherein being connected of live strand 4 and the pull bar of articulation 3, pull bar can be penetrated the suit hole 7 on it, also can use screw 18 to be fixed on some of fixture splice 2.

Press the combined type space geometry apparatus for demonstrating that the utility model is made, simple in structure, easy to use, it not only can presentation space point, line, surface, be equipped with projection screen and light and can also demonstrate their projection, can be used for the teaching demonstration of solid geometry, how much of space analysis, spherical geometry and descriptive geometry.

Claims

1, a kind of combined type space geometry apparatus for demonstrating, it is characterized in that it is by base plate 1, some pull bars and some rod heads constitute, described rod head is for being cube, have the fixture splice 2 of threaded hole or plug-in opening on six and prop up 4 by the strand of living, the strand of living props up 5, the articulation 3 that pole 6 is constituted, described pull bar can be the telescopic lever 9 that is socketed to form by big sleeve pipe 10 and small casing 11, by unit head screw thread or plug-in opening 13 are arranged uniformly at intervals in length and breadth on the described base plate 1, described pull bar is connected with base plate 1 by screw thread or plug-in opening 13, and described pull bar splices by fixture splice 2 and articulation 3 each other.

2, according to the described combined type space geometry of claim 1 apparatus for demonstrating, it is characterized in that containing the plurality of fixed pull bar.

3, according to claim 1 or 2 described combined type space geometry apparatus for demonstrating, it is characterized in that containing several hemisphere faces 16, and be evenly equipped with several screw threads or plug-in opening 17 on the described hemisphere face 16.