CN203799527U - Device for demonstrating positional relation between straight line and circle - Google Patents
Device for demonstrating positional relation between straight line and circle Download PDFInfo
- Publication number
- CN203799527U CN203799527U CN201420113658.9U CN201420113658U CN203799527U CN 203799527 U CN203799527 U CN 203799527U CN 201420113658 U CN201420113658 U CN 201420113658U CN 203799527 U CN203799527 U CN 203799527U
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- China
- Prior art keywords
- connecting plate
- rotating shaft
- straight line
- circle
- disk
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- 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.)
- Expired - Fee Related
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Abstract
The utility model belongs to the field of education, and particularly relates to improvements on the structure of a device for demonstrating the positional relation between a straight line and a circle. The device provided by the utility model for demonstrating the positional relation between the straight line and the circle can change the positional relation between the straight line and the circle so as to enable students to understand the positional relation between the straight line and the circle quickly. The device for demonstrating the positional relation between the straight line and the circle comprises a circular plate, a first connecting plate and a second connecting plate, and is structurally characterized in that a central part of one side of the circular plate is provided with a first rotating shaft whose axis is vertical with the circular plate, one end of the first connecting plate is fixedly connected to the first rotating shaft, and the length of the first connecting plate is greater than the radius of the circular plate; the first connecting plate is provided with a sliding slot, the sliding slot is internally provided with a sliding block which can slide in the sliding slot, the sliding block is provided with a second rotating shaft, and one end of the connecting plate is fixedly connected to the second rotating shaft.
Description
Technical field
The utility model belongs to education sector, especially relates to the improvement of the position relationship demonstration device structure of a kind of straight line and circle.
Background technology
Junior Mathematics relates to the course of the position relationship of straight line and circle, general teacher is the explanation of drawing on blackboard at school time, but the explanation of drawing exists and cannot change flexibly straight line and cause the low and student of efficiency of teaching to understand difficult problem with the problem of the position relationship of circle.
Summary of the invention
The utility model is exactly for the problems referred to above, provides a kind of energy the position relationship demonstration device that can change straight line and the position relationship of circle and make a kind of straight line that student can fast understanding and circle much of that.
For achieving the above object, the utility model adopts following technical scheme, the utility model comprises disk, the first connecting plate and the second connecting plate, its structural feature is: be provided with the first perpendicular rotating shaft of axle center and disk in the center of disk one side, one end of the first connecting plate is fixed in the first rotating shaft, and the length of the first connecting plate is greater than the radius of disk; The first connecting plate with on be provided with chute, in chute, be provided with the slide block that can slide in chute, the second rotating shaft is set on slide block, one end of the second connecting plate is fixed in the second rotating shaft.
Further, can with one end that the second rotating shaft is connected, protractor be set at the second connecting plate, on the first connecting plate and the second connecting plate, scale be set; Scale on throughput hornwork and the first connecting plate, the second connecting plate is arranged exercise to student, can increase students ' interest of study.
As a kind of preferred version, the both sides of the one end being connected with the second rotating shaft at the second connecting plate are provided with protractor.
As another kind of preferred version, the first described connecting plate length is disk diameter 1.5 times.
As another preferred version, described chute and slide block are magnet and make; Chute and slide block that magnet is made attract each other, the convenient position of fixing slide block in the time demonstrating, or after demonstration finishes, can take off easily slide block and the second rotating shaft and the second connecting plate.
The utility model beneficial effect.
1, can demonstrate flexibly the position relationship of straight line and circle.
The utility model is provided with axle center first rotating shaft vertical with disc centre in the center of disk one side, one end of the first connecting plate is fixed in the first rotating shaft, and the length of the first connecting plate is greater than the radius of disk; The first connecting plate with on be provided with chute, in chute, be provided with the slide block that can slide in chute, the second rotating shaft is set on slide block, one end of the second connecting plate is fixed in the second rotating shaft, the second connecting plate is provided with protractor with one end that the second rotating shaft is connected; When use, driving the second rotating shaft and the second connecting plate to move by sliding slider coordinates the second connecting plate to rotate around the second rotating shaft, can demonstrate easily straight line and crossing, the tangent and straight line of circle and circular diameter to vertical isoline the position relationship with circle, very intuitively, flexible, facilitate student to understand.
2, simple in structure, be convenient to produce.
The utility model comprises disk, and the first connecting plate and the second connecting plate are provided with axle center first rotating shaft vertical with disc centre in the center of disk one side, and one end of the first connecting plate is fixed in the first rotating shaft, and the length of the first connecting plate is greater than the radius of disk; The first connecting plate with on be provided with chute, in chute, be provided with the slide block that can slide in chute, the second rotating shaft is set on slide block, one end of the second connecting plate is fixed in the second rotating shaft, the second connecting plate is provided with protractor with one end that the second rotating shaft is connected; Member is few, simple in structure, and institute is so that produce.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model A-A view.
In figure, 1 is that disk, 2 is that the first rotating shaft, 3 is that the second connecting plate, 4 was that the first connecting plate, 5 is that chute, 6 is that protractor, 7 is that the second rotating shaft, 8 is slide block.
Embodiment
As shown in Figure 1, the utility model comprises disk 1, the first connecting plate 4 and the second connecting plate 3, is provided with the first perpendicular rotating shaft 2 of axle center and disk 1 in the center of disk 1 one sides, one end of the first connecting plate 4 is fixed in the first rotating shaft 2, and the length of the first connecting plate 4 is greater than the radius of disk 1; The first connecting plate 4 with on be provided with chute 5, in chute 5, being provided with can be at the slide block 8 of chute 5 interior slips, one end that the second rotating shaft 7, the second connecting plates 3 are set on slide block 8 is fixed in the second rotating shaft 7, and the second connecting plate 3 is provided with protractor 6 with one end that the second rotating shaft 7 is connected.
Can with one end that the second rotating shaft 7 is connected, protractor 6 be set at the second connecting plate 3, on the first connecting plate 4 and the second connecting plate 3, scale be set; Scale on throughput hornwork 6 and the first connecting plate 4, the second connecting plate 3 is arranged exercise to student, can increase students ' interest of study.
The both sides of the one end being connected with the second rotating shaft 7 at the second connecting plate 3 are provided with protractor 6.
The first described connecting plate 4 length are 1.5 times of disk 1 diameter.
Described chute 5 and slide block 8 are magnet and make; Chute 5 and slide block 8 that magnet is made attract each other, the convenient position of fixing slide block 8 in the time demonstrating, or after demonstration finishes, can take off easily slide block 8 and the second rotating shaft 7 and the second connecting plate 3.
Described disk 1 diameter is 30cm, and the first connecting plate 4 width are 2.5cm.
Below in conjunction with brief description of the drawings one-off process of the present utility model.
When demonstration straight line is tangent with circle, first moving slider 8, to appropriate location, turns 7 by the second connecting plate 3 around the second rotating shaft and moves the position tangent with disk 1.Demonstration straight line with justify when crossing, first, the second connecting plate 3 is turned to the position crossing with disk 1.When demonstration straight line vertical circular diameter, as long as the first connecting plate 4 is turned to and points to disk 1 center.
Claims (5)
1. the position relationship demonstration device of straight line and circle, comprise disk (1), the first connecting plate (4) and the second connecting plate (3), it is characterized in that: be provided with perpendicular the first rotating shaft (2) of axle center and disk (1) in the center of disk (1) one side, it is upper that one end of the first connecting plate (4) is fixed in the first rotating shaft (2), and the length of the first connecting plate (4) is greater than the radius of disk (1); The first connecting plate (4) with on be provided with chute (5), in chute (5), be provided with the slide block (8) that can slide in chute (5), the second rotating shaft (7) is set on slide block (8), it is upper that one end of the second connecting plate (3) is fixed in the second rotating shaft (7), and one end that the second connecting plate (3) is connected with the second rotating shaft (7) is provided with protractor (6).
2. the position relationship demonstration device of straight line according to claim 1 and circle, it is characterized in that: the one end being connected with the second rotating shaft (7) at the second connecting plate (3) arranges protractor (6), on the first connecting plate (4) and the second connecting plate (3), scale is set.
3. the position relationship demonstration device of straight line according to claim 2 and circle, is characterized in that: the both sides of the one end being connected with the second rotating shaft (7) at the second connecting plate (3) are provided with protractor (6).
4. the position relationship demonstration device of straight line according to claim 1 and circle, is characterized in that: described the first connecting plate (4) length is 1.5 times of disk 1 diameter.
5. the position relationship demonstration device of straight line according to claim 1 and circle, is characterized in that: described chute (5) and slide block (8) are magnet and make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113658.9U CN203799527U (en) | 2014-03-10 | 2014-03-10 | Device for demonstrating positional relation between straight line and circle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113658.9U CN203799527U (en) | 2014-03-10 | 2014-03-10 | Device for demonstrating positional relation between straight line and circle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203799527U true CN203799527U (en) | 2014-08-27 |
Family
ID=51381724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420113658.9U Expired - Fee Related CN203799527U (en) | 2014-03-10 | 2014-03-10 | Device for demonstrating positional relation between straight line and circle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203799527U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205343A (en) * | 2015-05-05 | 2016-12-07 | 南京农业大学 | Magnetic four-bar mechanism experiment instrument |
| CN107393376A (en) * | 2017-07-28 | 2017-11-24 | 孟海华 | A kind of pushing type teaching aid for being used to solve oval problem of values determination |
-
2014
- 2014-03-10 CN CN201420113658.9U patent/CN203799527U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205343A (en) * | 2015-05-05 | 2016-12-07 | 南京农业大学 | Magnetic four-bar mechanism experiment instrument |
| CN106205343B (en) * | 2015-05-05 | 2020-02-04 | 南京农业大学 | Magnetic four-bar mechanism experimental instrument |
| CN107393376A (en) * | 2017-07-28 | 2017-11-24 | 孟海华 | A kind of pushing type teaching aid for being used to solve oval problem of values determination |
| CN107393376B (en) * | 2017-07-28 | 2024-04-05 | 孟海华 | A push away formula teaching aid for solving oval definite value problem |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20150310 |
|
| EXPY | Termination of patent right or utility model |