CN106205296A - A kind of for verifying the instruments of inspection that oval latus rectum is the shortest - Google Patents
A kind of for verifying the instruments of inspection that oval latus rectum is the shortest Download PDFInfo
- Publication number
- CN106205296A CN106205296A CN201610577151.2A CN201610577151A CN106205296A CN 106205296 A CN106205296 A CN 106205296A CN 201610577151 A CN201610577151 A CN 201610577151A CN 106205296 A CN106205296 A CN 106205296A
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- CN
- China
- Prior art keywords
- base plate
- bar shaped
- oval
- shortest
- latus rectum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
- G09B23/04—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics for geometry, trigonometry, projection or perspective
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Geometry (AREA)
- Business, Economics & Management (AREA)
- Algebra (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention relates to a kind of for verifying the instruments of inspection that oval latus rectum is the shortest, belong to teaching aid technical field, including oval base plate, described oval bottom edge is provided with baffle plate, the two ends of described baffle plate lay respectively at two axis of symmetry place end on base plate, between described baffle plate and base plate, there is sliding tray, on described base plate, the focal point near baffle plate side is provided with positioning convex column, bar shaped chi is set on described base plate, offering in described bar shaped chi and limit the bar-shaped trough that positioning convex column is slided, described bar shaped chi one end is additionally provided with the end that is slidably connected that can slide along sliding tray.By fixing positioning convex column and the end that is slidably connected that can slide along sliding tray when this technical scheme uses, carry out the position adjustment of bar shaped chi, owing to positioning convex column can be slided by the constraint of sliding tray, it is possible to realize relatively rotating of bar shaped chi, thus simulate the arbitrary chord length through overfocus F, and then verify all in the string of overfocus F, latus rectum is the shortest.
Description
Technical field
The present invention relates to a kind of for verifying the instruments of inspection that oval latus rectum is the shortest, belong to teaching aid technical field.
Background technology
The focus that latus rectum was oval is perpendicular to the string of major axis, and in the string of oval all overfocus, latus rectum is the shortest,
During middle-school mathematics teaching, mostly prove that latus rectum is the shortest by mathematical formulae, but the derivation of mathematical formulae is to teaching
For the most uninteresting, therefore to improve the learning interest of Students in Teaching, devise a kind of for verifying ellipse targetedly
All overfocus string in the shortest instruments of inspection of latus rectum.
Summary of the invention
To this end, the invention provides a kind of for verifying the instruments of inspection that oval latus rectum is the shortest, concrete technical scheme is as follows:
A kind of for verifying the instruments of inspection that oval latus rectum is the shortest, including oval base plate, described oval bottom edge is arranged
There are baffle plate, the two ends of described baffle plate to lay respectively at two axis of symmetry place end on base plate, between described baffle plate and base plate, there is slip
Groove, on described base plate, the focal point near baffle plate side is provided with positioning convex column, and described base plate arranges bar shaped chi, described bar shaped
Offering in chi and limit the bar-shaped trough that positioning convex column is slided, described bar shaped chi one end is additionally provided with the slip can slided along sliding tray
Connect end.
As the improvement of technique scheme, described positioning convex column uses magnetic suck material to make, and described base plate uses
Iron plate is made.
As the improvement of technique scheme, described bar-shaped trough is additionally provided with sliding shoe.
By fixing positioning convex column and the end that is slidably connected that can slide along sliding tray when technique scheme uses, enter
The position adjustment of row bar shaped chi, owing to positioning convex column can be slided by the constraint of sliding tray, it is possible to realize the relative of bar shaped chi
Rotating, thus simulate the arbitrary chord length through overfocus F, and then verify all in the string of overfocus F, latus rectum is the shortest, has
Useful technique effect and significant practical value.
Accompanying drawing explanation
Fig. 1 be the present invention a kind of in time verifying that the shortest instruments of inspection of oval latus rectum uses bar shaped chi be positioned at latus rectum
Structural representation；
Fig. 2 be the present invention a kind of in time verifying that the shortest instruments of inspection of oval latus rectum uses bar shaped chi be positioned at the structure at major axis
Schematic diagram；
Fig. 3 is two axis of symmetry and the schematic diagram of focus position of base plate in the present invention.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the invention provides a kind of for verifying the instruments of inspection that oval latus rectum is the shortest, including ellipse
Shape base plate 10, described oval base plate 10 edge is provided with baffle plate 11, and the two ends of described baffle plate 11 lay respectively on base plate 10 two
Axis of symmetry place end, has sliding tray 12 between described baffle plate 11 and base plate 10, near baffle plate 11 side on described base plate 10
Focal point is provided with positioning convex column 31, and described base plate 10 arranges bar shaped chi 20, offers restriction location in described bar shaped chi 20
The bar-shaped trough 21 that projection 31 slides, described bar shaped chi 20 one end is additionally provided with the end 30 that is slidably connected that can slide along sliding tray 12.
X-axis that in such scheme, on base plate 10, two axis of symmetry are divided in Fig. 3 and Y-axis, and near baffle plate 11 1 on base plate 10
The focus of side is then focus F in Fig. 3.Pass through fixing positioning convex column 31 when such scheme uses and can slide along sliding tray 12
The end 30 that is slidably connected, carry out the position adjustment of bar shaped chi 20, owing to positioning convex column 31 can be slided by the constraint of sliding tray 12, institute
To be capable of relatively rotating of bar shaped chi 20, thus simulate the arbitrary chord length through overfocus F, and then verify all through overfocus
In the string of some F, latus rectum is the shortest.
Further, described positioning convex column 31 uses magnetic suck material to make, and described base plate 10 uses iron plate to make, its
Middle positioning convex column 31 can use Nd-Fe-B permanent magnet to make, and is connected with the absorption of iron base plate 10 by it, it is achieved the present invention
Base plate 10 and the sectional type structure of bar shaped chi 20, carry more convenient.
Further, described bar-shaped trough 21 is additionally provided with sliding shoe 32, during use, first bar shaped chi 20 is turned to Fig. 1
Shown latus rectum position, and sliding shoe 32 is slided into base plate 10 edge, path-length is marked, then rotation strip
Shape chi 20, the position of sliding shoe 32 is always positioned at inside base plate 10, and the most provable latus rectum is the shortest.
This set instruments of inspection, simple in construction, it is convenient for carrying, simple operation, demonstrating effect is preferable, imparts knowledge to students with this teaching aid, with
Learn interest the highest, inquiry part classmate after class, reaction experiment effect is preferable, memory and profound, enhances oval latus rectum character
Understanding.
Above embodiments of the invention are described in detail, but described content have been only presently preferred embodiments of the present invention,
Being not to be regarded as the practical range for limiting the present invention, all equalizations made according to the scope of the invention change and improvement etc., all should
Within still belonging to covering scope of the present invention.
Claims (3)
1. one kind is used for verifying the instruments of inspection that oval latus rectum is the shortest, it is characterised in that include oval base plate (10), described ellipse
Circular bottom plate (10) edge is provided with baffle plate (11), and the two ends of described baffle plate (11) lay respectively at the upper two axis of symmetry institutes of base plate (10)
At end, having sliding tray (12) between described baffle plate (11) and base plate (10), described base plate (10) is upper near baffle plate (11) side
Focal point be provided with positioning convex column (31), described base plate (10) arranges bar shaped chi (20), offers in described bar shaped chi (20)
The bar-shaped trough (21) that restricted positioning convex column (31) is slided, described bar shaped chi (20) one end is additionally provided with can be sliding along sliding tray (12)
The dynamic end (30) that is slidably connected.
A kind of for verifying the instruments of inspection that oval latus rectum is the shortest, it is characterised in that described location
Projection (31) uses magnetic suck material to make, and described base plate (10) uses iron plate to make.
A kind of for verifying the instruments of inspection that oval latus rectum is the shortest, it is characterised in that described bar shaped
Sliding shoe (32) it is additionally provided with on groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610577151.2A CN106205296A (en) | 2016-07-21 | 2016-07-21 | A kind of for verifying the instruments of inspection that oval latus rectum is the shortest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610577151.2A CN106205296A (en) | 2016-07-21 | 2016-07-21 | A kind of for verifying the instruments of inspection that oval latus rectum is the shortest |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106205296A true CN106205296A (en) | 2016-12-07 |
Family
ID=57491853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610577151.2A Pending CN106205296A (en) | 2016-07-21 | 2016-07-21 | A kind of for verifying the instruments of inspection that oval latus rectum is the shortest |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106205296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781886A (en) * | 2016-12-15 | 2017-05-31 | 顾登慧 | Oval perimeters law verifies instructional device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032147U (en) * | 1988-07-07 | 1989-02-08 | 王世武 | Simple ellipse compasses |
| CN2058518U (en) * | 1989-09-06 | 1990-06-20 | 陈大海 | Sucker combined type teaching aid for plane analytic geometry |
| CN2245245Y (en) * | 1995-08-08 | 1997-01-15 | 孟庆炎 | Plane and anylytical geometry curve demonstrator |
| CN201638421U (en) * | 2009-12-07 | 2010-11-17 | 崔翔 | Ellipse characteristic demonstration device |
| CN202053793U (en) * | 2011-04-06 | 2011-11-30 | 扬州大学 | Ellipse ruler |
| CN204066507U (en) * | 2014-08-29 | 2014-12-31 | 大连世佳自动化设备有限公司 | A kind of science popularization device of simulating ellipsograph |
| CN204496785U (en) * | 2015-04-05 | 2015-07-22 | 李德香 | A kind of sliding chord length apparatus for demonstrating |
-
2016
- 2016-07-21 CN CN201610577151.2A patent/CN106205296A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032147U (en) * | 1988-07-07 | 1989-02-08 | 王世武 | Simple ellipse compasses |
| CN2058518U (en) * | 1989-09-06 | 1990-06-20 | 陈大海 | Sucker combined type teaching aid for plane analytic geometry |
| CN2245245Y (en) * | 1995-08-08 | 1997-01-15 | 孟庆炎 | Plane and anylytical geometry curve demonstrator |
| CN201638421U (en) * | 2009-12-07 | 2010-11-17 | 崔翔 | Ellipse characteristic demonstration device |
| CN202053793U (en) * | 2011-04-06 | 2011-11-30 | 扬州大学 | Ellipse ruler |
| CN204066507U (en) * | 2014-08-29 | 2014-12-31 | 大连世佳自动化设备有限公司 | A kind of science popularization device of simulating ellipsograph |
| CN204496785U (en) * | 2015-04-05 | 2015-07-22 | 李德香 | A kind of sliding chord length apparatus for demonstrating |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781886A (en) * | 2016-12-15 | 2017-05-31 | 顾登慧 | Oval perimeters law verifies instructional device |
| CN106781886B (en) * | 2016-12-15 | 2019-05-28 | 顾登慧 | Oval perimeters law verifies instructional device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |