CN202826870U - Mathematical teaching aid for drawing ellipses on the blackboard - Google Patents
Mathematical teaching aid for drawing ellipses on the blackboard Download PDFInfo
- Publication number
- CN202826870U CN202826870U CN 201220529589 CN201220529589U CN202826870U CN 202826870 U CN202826870 U CN 202826870U CN 201220529589 CN201220529589 CN 201220529589 CN 201220529589 U CN201220529589 U CN 201220529589U CN 202826870 U CN202826870 U CN 202826870U
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Abstract
A mathematical teaching aid for drawing ellipses on the blackboard belongs to a mathematical teaching aid. The mathematical teaching aid for drawing ellipses comprises a first shaft (11), a second shaft (21), a first swivel (12) sheathed in the first shaft (11), a second swivel (22) sheathed in the second shaft (21), a focal line (3) connecting the first shaft (11) with the second shaft (21), a long shaft line (4) connecting the first swivel (12) with the second swivel (22), a first sucker (13) connected with the lower end of the first shaft (11) and a second sucker (23) connected with the lower end of the second shaft (21). The length of the focal line (3) is less than the length of the long shaft line (4). Mathematics teachers can according to need draw any shape and size of ellipses on the blackboard by using the teaching aid. The teaching aid has the advantages of small volume, light weight, convenient to use and carry.
Description
Technical field
A kind of for belonging to a kind of teaching apparatus for mathematics at the oval-shaped mathematics teaching aid of blackboard drafting.
Background technology
On the mathematics class, ellipse is the higher a kind of figure of the frequency of occurrences, and the teacher need to draw circular on the blackboard of being everlasting.Yet, circular and easy drafting unlike square and rectangle, even also larger than the drafting difficulty of circle, and Freehandhand-drawing result out often can not be satisfactory, even to the student understanding of figure is brought difficulty.Some teachers are in order to beautify figure, with an oval-shaped plank as model, yet this teaching aid not only carries inconvenience, and the image size and shape drawing out all be the same, can not satisfy the demand in the different exercise questions.
Summary of the invention
In order to address the above problem, the utility model has designed a kind of for drawing oval-shaped mathematics teaching aid at blackboard, utilize this mathematics teaching aid can draw as required the ellipse of arbitrary dimension and size at blackboard, and this teaching aid have advantages of that volume is little, lightweight, easy to use, easy to carry.
The purpose of this utility model is achieved in that
A kind of for drawing oval-shaped mathematics teaching aid at blackboard, comprise the first axis, the second axis, be socketed in the first change on the first axis, be socketed in the second change on the second axis, connect its focal lines of the first axis and the second axis, connect the long axis of the first change and the second change, be connected to the first sucker of the first axis bottom, be connected to the second sucker of the second axis bottom.
Above-mentioned is a kind of for drawing oval-shaped mathematics teaching aid at blackboard, and described its focal lines length is less than long axis length.
Above-mentioned is a kind of for drawing oval-shaped mathematics teaching aid at blackboard, and the external diameter of described the first axis is less than the internal diameter of the first change; The external diameter of described the second axis is less than the internal diameter of the second change.
Above-mentioned a kind of described the first axis bottom is provided with the first boss for drawing oval-shaped mathematics teaching aid at blackboard, and the top is provided with first grade of ring; Described the second axis bottom is provided with the second boss, and the top is provided with the second gear ring.
Be threaded between above-mentioned a kind ofly be threaded connection between described the first axis and first grade of ring for drawing oval-shaped mathematics teaching aid at blackboard, the second axis and second gear ring.
Above-mentioned a kind of described its focal lines is fixedly connected with the first axis, is connected by the axis single hole sling that is configured on the second axis with the second axis for drawing oval-shaped mathematics teaching aid at blackboard, and its focal lines is passed the hole of axis single hole sling; Described long axis is fixedly connected with the first change, is connected by the change single hole sling that is configured in the second change with the second change, and long axis passes the hole of change single hole sling.
Because the utility model is used for drawing oval-shaped mathematics teaching aid at blackboard, comprise the first axis, the second axis, be socketed in the first change on the first axis, be socketed in the second change on the second axis, connect its focal lines of the first axis and the second axis, connect the long axis of the first change and the second change, be connected to the first sucker of the first axis bottom, be connected to the second sucker of the second axis bottom; This design is so that the mathematics teacher can draw the ellipse of arbitrary dimension and size as required at blackboard, and this teaching aid has advantages of that volume is little, lightweight, easy to use, easy to carry.
Description of drawings
Fig. 1 is that the utility model is drawn oval-shaped mathematics teaching aid structural representation.
Schematic diagram when Fig. 2 is this teaching aid use.
Among the figure: 11 first axis, 12 first changes, 13 first suckers, 14 first boss, 15 first grades of rings, 21 second axis, 22 second changes, 23 second suckers, 24 second boss, 25 second gear rings, 3 its focal lines, 4 long axis, 5 axis single hole slings, 6 change single hole slings.
The specific embodiment
Below in conjunction with accompanying drawing the utility model specific embodiment is described in further detail.
Being used at the oval-shaped mathematics teaching aid of blackboard drafting of the present embodiment, comprise the first axis 11, the second axis 21, be socketed in the first change 12 on the first axis 11, be socketed in the second change 22 on the second axis 21, connect its focal lines 3 of the first axis 11 and the second axis 21, connect the long axis 4 of the first change 12 and the second change 22, be connected to the first sucker 13 of the first axis 11 bottoms, be connected to the second sucker 23 of the second axis 21 bottoms; Described its focal lines 3 length are less than long axis 4 length; The external diameter of described the first axis 11 is less than the internal diameter of the first change 12, and the external diameter of described the second axis 21 is less than the internal diameter of the second change 22.
Above-mentioned described the first axis 11 bottoms are provided with the first boss 14 for drawing oval-shaped mathematics teaching aid at blackboard, and the top is provided with first grade of ring 15, are threaded connection between described the first axis 11 and first grade of ring 15; Described the second axis 21 bottoms are provided with the second boss 24, and the top is provided with second gear ring 25, are threaded between described the second axis 21 and the second gear ring 25.
Above-mentioned described its focal lines 3 is fixedly connected with the first axis 11, is connected by the axis single hole sling 5 that is configured on the second axis 21 with the second axis 21 for drawing oval-shaped mathematics teaching aid at blackboard, and its focal lines 3 is passed the hole of axis single hole sling 5; Described long axis 4 is fixedly connected with the first change 12, is connected by the change single hole sling 6 that is configured in the second change 22 with the second change 22, and long axis 4 passes the hole of change single hole sling 6.
When in use, according to the oval focal length of draw, adjusting focal length line 3 passes the position of axis single hole sling 5, according to the oval major axis of draw, adjusts the position that long axis 4 passes change single hole sling 6, realizes oval drafting, as shown in Figure 2.This teaching aid is so that the mathematics teacher can draw the ellipse of arbitrary dimension and size as required at blackboard, and this teaching aid has advantages of that volume is little, lightweight, easy to use, easy to carry.
Claims (6)
1. one kind is used for drawing oval-shaped mathematics teaching aid at blackboard, it is characterized in that comprising the first axis (11), the second axis (21), be socketed in the first change (12) on the first axis (11), be socketed in the second change (22) on the second axis (21), the its focal lines (3) that connects the first axis (11) and the second axis (21), the long axis (4) that connects the first change (12) and the second change (22), be connected to first sucker (13) of the first axis (11) bottom, be connected to second sucker (23) of the second axis (21) bottom.
2. according to claim 1 a kind of for drawing oval-shaped mathematics teaching aid at blackboard, it is characterized in that described its focal lines (3) length is less than long axis (4) length.
3. according to claim 1 a kind of for drawing oval-shaped mathematics teaching aid at blackboard, it is characterized in that the external diameter of described the first axis (11) is less than the internal diameter of the first change (12); The external diameter of described the second axis (21) is less than the internal diameter of the second change (22).
4. according to claim 1ly a kind ofly it is characterized in that for drawing oval-shaped mathematics teaching aid at blackboard described the first axis (11) bottom is provided with the first boss (14), the top is provided with first grade of ring (15); Described the second axis (21) bottom is provided with the second boss (24), and the top is provided with second gear ring (25).
5. according to claim 4 a kind of for drawing oval-shaped mathematics teaching aid at blackboard, it is characterized in that being threaded connection between described the first axis (11) and the first grade of ring (15), be threaded between the second axis (21) and the second gear ring (25).
6. according to claim 1 a kind of for drawing oval-shaped mathematics teaching aid at blackboard, it is characterized in that described its focal lines (3) is fixedly connected with the first axis (11), be connected by the axis single hole sling (5) that is configured on the second axis (21) with the second axis (21), its focal lines (3) is passed the hole of axis single hole sling (5); Described long axis (4) is fixedly connected with the first change (12), is connected by the change single hole sling (6) that is configured in the second change (22) with the second change (22), and long axis (4) passes the hole of change single hole sling (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220529589 CN202826870U (en) | 2012-10-17 | 2012-10-17 | Mathematical teaching aid for drawing ellipses on the blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220529589 CN202826870U (en) | 2012-10-17 | 2012-10-17 | Mathematical teaching aid for drawing ellipses on the blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202826870U true CN202826870U (en) | 2013-03-27 |
Family
ID=47938644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220529589 Expired - Fee Related CN202826870U (en) | 2012-10-17 | 2012-10-17 | Mathematical teaching aid for drawing ellipses on the blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202826870U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107053910A (en) * | 2017-06-05 | 2017-08-18 | 深圳市凯旋创新品牌产品设计有限公司 | A kind of aid for having an X-rayed drawing |
| CN110654146A (en) * | 2019-09-29 | 2020-01-07 | 黑龙江科技大学 | A multi-functional teaching aid for mathematical education usefulness |
-
2012
- 2012-10-17 CN CN 201220529589 patent/CN202826870U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107053910A (en) * | 2017-06-05 | 2017-08-18 | 深圳市凯旋创新品牌产品设计有限公司 | A kind of aid for having an X-rayed drawing |
| CN110654146A (en) * | 2019-09-29 | 2020-01-07 | 黑龙江科技大学 | A multi-functional teaching aid for mathematical education usefulness |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20131017 |