CN204423758U - A kind of teaching aid verifying the surface area formula of ball - Google Patents
A kind of teaching aid verifying the surface area formula of ball Download PDFInfo
- Publication number
- CN204423758U CN204423758U CN201520121008.3U CN201520121008U CN204423758U CN 204423758 U CN204423758 U CN 204423758U CN 201520121008 U CN201520121008 U CN 201520121008U CN 204423758 U CN204423758 U CN 204423758U
- Authority
- CN
- China
- Prior art keywords
- methyl methacrylate
- plate
- hard plastic
- ball
- bead
- 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.)
- Expired - Fee Related
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Abstract
Verify that the teaching aid of the surface area formula of ball relates to a technical field for a kind of teaching aid and learning aid, the square poly (methyl methacrylate) plate with a circular hole is connected to the transparent hemi removing top, and the transparent hemi removing top is connected to transparent hard plastic ball; There is a bead transparent hard plastic ball inside by metal axle sleeve, one end of metal shaft is fixed wtih bead by hold-down nut, metal shaft between bead and transparent hard plastic ball is overlapped and has spring, metal shaft is welded with control handle in the outer exposed part of transparent hard plastic ball.The circular hole place of the square poly (methyl methacrylate) plate with four circular holes of bottom surface occupies toy bullet.Compared with prior art, by the movement of toy bullet, just can transfer to four circles equal with interior bulb diameter between two homocentric spheres be full of, the rough area formula demonstrating ball, be beneficial to student's hands-on and memory, improve learning interest, is a kind of teaching aid and learning aid of being easy to improvement and making.
Description
Technical field
The utility model relates to a kind of teaching aid and learning aid model, specifically a kind of teaching aid verifying the surface area formula of ball.
Background technology
In mathematical studying, need the surface area understanding familiar object, as the surface area of rectangular parallelepiped, the surface area of square, the surface area etc. of cone, the method that their surface area can adopt decomposition then to calculate is carried out, and the surface area of spheroid, need to use limit theory to shift onto and carry out, and for students in middle and primary schools, shift onto can not be accepted by student by theory, how to meet the curiosity of students in middle and primary schools, them are allowed to know the surface area of ball in advance, patent name is " the surface area checking demonstrator of ball ", number of patent application 2014201910156 describes a kind of demonstration teaching aid, though this teaching aid can be demonstrated preferably, but the poly (methyl methacrylate) plate needed is many, and the toy bullet of the inside is not easy to fall in four corresponding circular holes.
Utility model content
The utility model, mainly for the deficiencies in the prior art, by the knowledge of point-line-surface, provides and more saves material, simultaneously a kind of teaching aid verifying the surface area formula of ball of convenient operation.
The technical scheme that above-mentioned technical matters to be solved in the utility model adopts is: a kind of teaching aid verifying the surface area formula of ball, by square poly (methyl methacrylate) plate, with the square poly (methyl methacrylate) plate of four circular holes, with the square poly (methyl methacrylate) plate of a circular hole, toy bullet, toy bullet injects and tap hole, remove the transparent hemi on top, hold-down nut, transparent hard plastic ball, bead, metal shaft, spring and control handle composition, the bottom is square poly (methyl methacrylate) plate, middle one deck is the square poly (methyl methacrylate) plate with four circular holes, topmost one deck is the square poly (methyl methacrylate) plate formation bottom surface with a circular hole, square poly (methyl methacrylate) plate with a circular hole is connected to the transparent hemi removing top, the transparent hemi removing top is connected to transparent hard plastic ball, there is a bead transparent hard plastic ball inside by metal axle sleeve, one end of metal shaft is fixed wtih bead by hold-down nut, metal shaft between bead and transparent hard plastic ball is overlapped and has spring, metal shaft is welded with control handle in the outer exposed part of transparent hard plastic ball.
As preferably: the circular hole place of the square poly (methyl methacrylate) plate with four circular holes of bottom surface occupies toy bullet, with the thickness of the square poly (methyl methacrylate) plate of four circular holes slightly larger than the diameter of toy bullet; The inside diameter of transparent hard plastic ball slightly larger than the diameter of bead and two times of toy bullet diameters and.
Further, middle layer, bottom forms toy bullet with the square poly (methyl methacrylate) plate of four circular holes and upper strata with the square poly (methyl methacrylate) plate infall of a circular hole and injects and tap hole.
Further, the corner place of the utility model base portion is welded with foot pad.
Compare with teaching aid with existing form of teaching, the utility model is by the movement (representing each point in composition face) of toy bullet, just can transfer to four circles equal with interior bulb diameter between two homocentric spheres be full of, abstract sphere has been changed into understandable plane, the rough area formula demonstrating ball, be beneficial to student's hands-on and memory, improve learning interest, having deepened the understanding to mathematical knowledge, is a kind of mathematics teaching aid and learning aid of being easy to improvement and making.
Accompanying drawing explanation
Fig. 1 is overall schematic of the present utility model.
In figure: 1, square poly (methyl methacrylate) plate, 2, with the square poly (methyl methacrylate) plate of four circular holes, 3, square poly (methyl methacrylate) plate with a circular hole, 4, toy bullet, 5, toy bullet injects and tap hole, 6, the transparent hemi on top is removed, 7, hold-down nut, 8, transparent hard plastic ball, 9, bead, 10, metal shaft, 11, spring, 12, control handle.
Embodiment
Below in conjunction with accompanying drawing, composition of the present utility model and using method are further described.
A kind of teaching aid verifying the surface area formula of ball, by square poly (methyl methacrylate) plate 1, with the square poly (methyl methacrylate) plate 2 of four circular holes, with the square poly (methyl methacrylate) plate 3 of a circular hole, toy bullet 4, remove the transparent hemi 6 on top, hold-down nut 7, transparent hard plastic ball 8, bead 9, metal shaft 10, spring 11 and control handle 12 form, the bottom is square poly (methyl methacrylate) plate 1, middle one deck is the square poly (methyl methacrylate) plate 2 with four circular holes, one deck is the square poly (methyl methacrylate) plate 3 with a circular hole above, three layers form bottom surface, square poly (methyl methacrylate) plate 3 with a circular hole is connected to the transparent hemi 6 removing top, the transparent hemi 6 removing top is connected to transparent hard plastic ball 8, there is a bead 9 transparent hard plastic ball 8 inside by metal shaft 10 cover, one end of metal shaft 10 is fixed wtih bead 9 by hold-down nut 7, metal shaft 10 between bead 9 and transparent hard plastic ball 8 is overlapped and has spring 11, metal shaft 10 is welded with control handle 12 in the outer exposed part of transparent hard plastic ball 8.
The circular hole place of the square poly (methyl methacrylate) plate 2 with four circular holes of bottom surface occupies toy bullet 4, with the thickness of the square poly (methyl methacrylate) plate 2 of four circular holes slightly larger than the diameter of toy bullet 4; The inside diameter of transparent hard plastic ball 8 slightly larger than the diameter of bead 9 and two times of toy bullet 4 diameters and.Be conducive to toy bullet 4 like this to flow in sandwich portion.
During use, in advance toy bullet 4 is put into receptacle, toy bullet 4 is just full of with four circles in the square poly (methyl methacrylate) plate 2 of four circular holes.Weld each assembly according to diagram glue rifle, overturn this kind of teaching aid verifying the surface area formula of ball, can see that toy bullet 4 can be full of the sandwich portion between bead 9 and transparent hard plastic ball 8.In order to make toy bullet 4 better movement, needing rotary control knob 12 and driving metal shaft 10 to move a little along the direction of axle.
In a word, the utility model provides a kind of teaching aid verifying the surface area formula of ball.The above; be only a part of embodiment of the present utility model; protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.
Claims (2)
1. verify the teaching aid of the surface area formula of ball for one kind, by square poly (methyl methacrylate) plate (1), with the square poly (methyl methacrylate) plate (2) of four circular holes, with the square poly (methyl methacrylate) plate (3) of a circular hole, toy bullet (4), remove the transparent hemi (6) on top, hold-down nut (7), transparent hard plastic ball (8), bead (9), metal shaft (10), spring (11) and control handle (12) composition, it is characterized in that: the bottom is square poly (methyl methacrylate) plate (1), middle one deck is the square poly (methyl methacrylate) plate (2) with four circular holes, topmost one deck is the square poly (methyl methacrylate) plate (3) with a circular hole, three layers form bottom surface, square poly (methyl methacrylate) plate (3) with a circular hole is connected to the transparent hemi (6) removing top, the transparent hemi (6) removing top is connected to transparent hard plastic ball (8), there is a bead (9) transparent hard plastic ball (8) inside by metal shaft (10) cover, one end of metal shaft (10) is fixed wtih bead (9) by hold-down nut (7), the upper cover of metal shaft (10) between bead (9) and transparent hard plastic ball (8) has spring (11), and metal shaft (10) is welded with control handle (12) in the part that transparent hard plastic ball (8) is exposed outward.
2. a kind of teaching aid verifying the surface area formula of ball according to claim 1, it is characterized in that: the circular hole place of the square poly (methyl methacrylate) plate (2) with four circular holes of bottom surface occupies toy bullet (4), with the thickness of the square poly (methyl methacrylate) plate (2) of four circular holes slightly larger than the diameter of toy bullet (4); The inside diameter of transparent hard plastic ball (8) slightly larger than the diameter of bead (9) and two times of toy bullet (4) diameters and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121008.3U CN204423758U (en) | 2015-03-02 | 2015-03-02 | A kind of teaching aid verifying the surface area formula of ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121008.3U CN204423758U (en) | 2015-03-02 | 2015-03-02 | A kind of teaching aid verifying the surface area formula of ball |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204423758U true CN204423758U (en) | 2015-06-24 |
Family
ID=53474108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520121008.3U Expired - Fee Related CN204423758U (en) | 2015-03-02 | 2015-03-02 | A kind of teaching aid verifying the surface area formula of ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204423758U (en) |
-
2015
- 2015-03-02 CN CN201520121008.3U patent/CN204423758U/en not_active Expired - Fee Related
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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: 20150624 Termination date: 20160302 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |