CN2094777U - Point line plane projection demonstration teaching aid - Google Patents
Point line plane projection demonstration teaching aid Download PDFInfo
- Publication number
- CN2094777U CN2094777U CN 91209900 CN91209900U CN2094777U CN 2094777 U CN2094777 U CN 2094777U CN 91209900 CN91209900 CN 91209900 CN 91209900 U CN91209900 U CN 91209900U CN 2094777 U CN2094777 U CN 2094777U
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- CN
- China
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- projection
- line
- teaching aid
- face
- planes
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- Expired - Lifetime
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Abstract
The utility model discloses a points, lines and planes projection demonstration teaching aid, belonging to the teaching aid of the descriptive geometry. The projection demonstration teaching aid comprises a projection box composed of three projection planes W, H and V. The inner surface is provided with a sheet iron layer and simultaneous is provided with a supporting seat and small spheres for delegating points. Two ends of a rod are provided with wires formed by small spheres. Three terminal points of a T-shaped rod rack are provided with planes formed by small spheres. The supporting seat comprises a magnetic ring and a telescopic rod which are matched with points, wires and planes to be put in the projection box. The utility model can demonstrate projections of points, wires and planes in optional angles and positions. The utility model is simple in structure, low in cost, convenient in operation and visual in demonstration and is an ideal teaching aid of the descriptive geometry.
Description
The utility model belongs to the descriptive geometry teaching aid, is a kind of point, line, surface projection demonstration tool.
Universities especially generally adopt the cage steel wire rack to the demonstration explanation that point, line, surface projection and line line are intersected, the line face intersects, the face face intersects projection in the middle school descriptive geometry course at present,, steel wire rack is set as can be shelved the point, line, surface that are projected demonstration and intersect two wires, line face, face face.System demonstrates much steel wire racks of projection relation all sidedly, and cost height, operation of teacher also quite bother, and this steel wire rack complex structure, and demonstration is got up not directly perceived, and when particularly demonstrating the projection angle variation, the student accepts than indigestibility.
The purpose of this utility model provide a kind of simple in structure, cost is low, the point, line, surface projection of easy to operate, demonstrating visual demonstration tool.
The utility model is that three projecting plane W, H at the projection case, the inside surface of V are provided with the iron sheet layer, set the little ball of bearing, representative point simultaneously, respectively establish the line of roundlet ball formation at the two ends of bar, respectively establish the face of roundlet ball formation at three end points of T shape bridge, rest base is a magnet ring, be provided with steel ball in the magnet ring, the fixedly connected telescopic lever of steel ball.But little ball is put projection in telescopic lever top presentation site; Line is put the projection that to demonstrate line on the telescopic lever top; Face is put the projection of the face of can demonstrating on the telescopic lever top.
Providing embodiment below in conjunction with accompanying drawing makes the utility model and further specifying.
Fig. 1 is the topology view of present embodiment projection case;
Fig. 2 is the assembly structure view of the utility model bearing and point, line, surface.
Present embodiment is provided with a projection case that is made of W, H, three projecting planes of V, and the inside surface of W, H, V is provided with iron sheet layer (1), and skin can adopt three-ply board to make, simultaneously on inside surface is retouched graticule so that determine the projection coordinate position.Present embodiment also sets the little ball of bearing, representative point, respectively establishes the line of roundlet ball formation at the two ends of bar, respectively establishes the face that the roundlet ball constitutes at three end points of T shape bridge, rest base is magnet ring (2), be provided with steel ball (3) in the magnet ring (2), the fixedly connected telescopic lever of steel ball (3) (4), telescopic lever (4) top is provided with endoporus, but little ball, constitute on the bar of line, constitute the bearing pin (5) that is equipped with close-fitting pull bar top endoporus on the T shape bridge of face, represent the horizon bar of the T shape bridge of face can rotate relative to vertical bar.
The bearing pin of point (little ball), line, face is assemblied in the top endoporus of telescopic lever, bearing places in the projection case, bearing holds projection case baseplane by magnet ring, pull bar can be done arbitrarily towards adjusting by the activity of steel ball in magnet ring, and horizon bar the rotating of passing through T shape bridge relative to vertical bar, can projection arbitrarily angled to point, line, surface, the optional position demonstrate, can also reach best projection demonstration effect by mobile support saddle in case of necessity.
If will demonstrate line line, line face, crossing projection and the projection of point, line, surface relative position relation of face face, can adopt a plurality of bearings to finish.
As seen this practical from above-mentioned, simple in structure, cost is low, easy to operate, demonstrating visual, is a kind of desirable descriptive geometry teaching aid.
Claims (2)
1, a kind of point, line, surface projection demonstration tool with projection case, the projection case is made of W, H, three projecting planes of V, it is characterized in that the inside surface of W, H, V is provided with iron sheet layer (1); Set the little ball of bearing, representative point simultaneously, respectively establish the line that the roundlet ball constitutes at the two ends of bar, respectively establish the face that the roundlet ball constitutes at three end points of T shape bridge, rest base is magnet ring (2), be provided with steel ball (3), the fixedly connected telescopic lever of steel ball (3) (4) in the magnet ring (2), little ball, line, face all can be put on telescopic lever (4) top.
2, point, line, surface projection demonstration tool according to claim 1, it is characterized in that telescopic lever (4) top is provided with endoporus, but be equipped with the bearing pin (5) of close-fitting endoporus on little ball, line, the face, represent the horizon bar of the T shape bridge of face can rotate relative to vertical bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91209900 CN2094777U (en) | 1991-06-11 | 1991-06-11 | Point line plane projection demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91209900 CN2094777U (en) | 1991-06-11 | 1991-06-11 | Point line plane projection demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2094777U true CN2094777U (en) | 1992-01-29 |
Family
ID=4918770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91209900 Expired - Lifetime CN2094777U (en) | 1991-06-11 | 1991-06-11 | Point line plane projection demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2094777U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708732A (en) * | 2012-05-07 | 2012-10-03 | 山东科技大学 | Multifunctional three-side projection box and projection display method |
| CN103489350A (en) * | 2013-10-14 | 2014-01-01 | 上海电力学院 | Presentation device for point, line and plane projection teaching during auxiliary drawing |
| CN106297496A (en) * | 2016-08-31 | 2017-01-04 | 赵邦国 | Rectangular coordinate system in space model teaching aid |
| CN110930832A (en) * | 2019-12-11 | 2020-03-27 | 中国矿业大学 | Free vibration experimental device |
-
1991
- 1991-06-11 CN CN 91209900 patent/CN2094777U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708732A (en) * | 2012-05-07 | 2012-10-03 | 山东科技大学 | Multifunctional three-side projection box and projection display method |
| CN103489350A (en) * | 2013-10-14 | 2014-01-01 | 上海电力学院 | Presentation device for point, line and plane projection teaching during auxiliary drawing |
| CN106297496A (en) * | 2016-08-31 | 2017-01-04 | 赵邦国 | Rectangular coordinate system in space model teaching aid |
| CN110930832A (en) * | 2019-12-11 | 2020-03-27 | 中国矿业大学 | Free vibration experimental device |
| CN110930832B (en) * | 2019-12-11 | 2022-04-01 | 中国矿业大学 | Free vibration experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |