CN203480736U - Static friction force demonstrator for teaching - Google Patents
Static friction force demonstrator for teaching Download PDFInfo
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- CN203480736U CN203480736U CN201320608454.8U CN201320608454U CN203480736U CN 203480736 U CN203480736 U CN 203480736U CN 201320608454 U CN201320608454 U CN 201320608454U CN 203480736 U CN203480736 U CN 203480736U
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- duct
- teaching
- stiction
- static friction
- demonstration device
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Abstract
The utility model belongs to the technical field of teaching aid design and manufacture, and particularly to a static friction force demonstrator for teaching. The demonstrator comprises a cushion box. Two short edges of a rectangular housing of the demonstrator are respectively provided with a bulkhead. The bulkhead at one end abuts against the cushion box so that a ramp with an inclination relative to the horizontal direction is formed on the rectangular housing. Two transparent long side walls are arranged between the two bulkheads. An antislide plastic tape is arranged at the lower part. Hollow vertical pipes which respectively have two semicircular ends are placed on the antislide plastic tape. A steel ball is placed in each vertical pipe. The static friction force demonstrator for teaching has a reasonably designed structure. The characteristic of static friction is enhanced. Visual and vivid effect is realized. Easy understanding of the student is obtained. High demonstration effect is realized. The static friction force demonstrator for teaching can guide the student to analyze the scientific principle therein. The interesting demonstration facilitates scientific research by the student. Simultaneously, teaching quality on class is greatly improved.
Description
Technical field
The utility model belongs to design and the manufacturing technology field of teaching aid, particularly a kind of teaching stiction demonstration device.
Background technology
Existing textbook is about the effect of stiction, its exhibition method is more abstract, such mode is told pupil, and pupil is difficult to understand, and teacher is according to the method explanation of teaching material prompting, student is not dark for the understanding of stiction, not directly perceived, course says and is over, existence and effect that student can not clear understanding stiction, many students leave in the heart greatly and feel uncertain, and such teaching efficiency is very bad.Can design a kind of demonstration device of stiction to facilitate student method is observed stiction intuitively effect and feature, facilitate student to understand.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of teaching aid intuitively of Design and manufacture is demonstration device in other words, shows intuitively the feature of stiction, and guiding student is analyzed the principles of science wherein from phenomenon, and guiding student launches scientific exploration.
It is as follows that the utility model solves the problems of the technologies described above adopted technical scheme: teaching stiction demonstration device, comprise pad case, two minor faces of described demonstration device rectangular box are arranging respectively plug, one end plug rides on pad case, make rectangular box and horizontal direction form the ramp with angle of inclination, two long limit walls of transparent rectangular box are being set between two plugs, casing top integral finish, bottom is arranging an Antislip plastic material strip isometric with the long limit of rectangular box; The hypophysial duct craniopharyngeal duct of the hollow of two ends semicircular in shape is placed on Antislip plastic material strip, is placing steel ball in hypophysial duct craniopharyngeal duct, and steel ball is Free-rolling in hypophysial duct craniopharyngeal duct.
In practice, by being placed in hollow hypophysial duct craniopharyngeal duct in casing, (in casing, be covered with 2 millimeters thick Antislip plastic material strips), the hypophysial duct craniopharyngeal duct with falling tendency because of its surface and anti-skidding thick plastic tape surface of contact between under the effect of the stiction that produces, make the hypophysial duct craniopharyngeal duct can not down sliding on inclined-plane; At this moment the steel ball that is less than hypophysial duct craniopharyngeal duct diameter is put into wherein, it,, under the effect of stiction, steel ball gravity, rolls by default ramp from top to bottom.And steel ball is under the effect of gravity, in hypophysial duct craniopharyngeal duct, can roll downwards, the fulcrum that curved surface each point outside hypophysial duct craniopharyngeal duct has become hypophysial duct craniopharyngeal duct to rotate, steel ball gravity has become the force of using of hypophysis lever, under hypophysis rolls from top to down under the effect of stiction, steel ball gravity.This teaching demonstration device materials are glass edge corner materials, adhesive tape, polyfoam, and two hemispheres, an empty plastic cylinder pipe the same as hemisphere internal diameter, an internal diameter is less than the steel ball of hemisphere internal diameter.Above combination of materials just can be completed, and transparency is high, is convenient to observe.
The beneficial effects of the utility model: the utility model reasonable in design, highlighted the feature of stiction, effect is more directly perceived, vivid, student is easily understood, demonstration effect is fine, can from phenomenon, analyze the principles of science wherein by guiding student, and such entertaining demonstration is conducive to student and launches scientific exploration, meanwhile, improved greatly the quality of instruction in classroom.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is the perspective view of the utility model embodiment 1.
Embodiment
Embodiment 1, teaching stiction demonstration device, as shown in Figure 1, comprise pad case 1, two minor faces of described demonstration device rectangular box are arranging respectively plug 6, one end plug 6 rides on pad case 1, makes rectangular box and horizontal direction form the ramp with angle of inclination, and two long limit walls of transparent rectangular box are being set between two plugs 6, casing top integral finish, bottom is arranging an Antislip plastic material strip 5 isometric with the long limit of rectangular box; The hypophysial duct craniopharyngeal duct 2 of the hollow of two ends semicircular in shape is placed on Antislip plastic material strip 5, and at the interior steel ball 3 of placing of hypophysial duct craniopharyngeal duct 2, steel ball 3 is at the interior Free-rolling of hypophysial duct craniopharyngeal duct 2.Described hypophysial duct craniopharyngeal duct 2 is made for transparent plastic or opaque plastics material.Described steel ball 3 is at least one piece.Described Antislip plastic material strip 5 width are not more than the insied width of casing.Described Antislip plastic material strip 5 thickness are 2mm.
Claims (5)
1. impart knowledge to students and use stiction demonstration device, comprise pad case (1), it is characterized in that: two minor faces of described demonstration device rectangular box are arranging respectively plug (6), one end plug (6) rides on pad case (1), make rectangular box and horizontal direction form the ramp with angle of inclination, two long limit walls of transparent rectangular box are being set between two plugs (6), casing top integral finish, bottom is arranging an Antislip plastic material strip (5) isometric with the long limit of rectangular box; It is upper that the hypophysial duct craniopharyngeal duct of the hollow of two ends semicircular in shape (2) is placed on Antislip plastic material strip (5), placing steel ball (3) in hypophysial duct craniopharyngeal duct (2), and steel ball (3) is Free-rolling in hypophysial duct craniopharyngeal duct (2).
2. teaching according to claim 1 stiction demonstration device, is characterized in that: described hypophysial duct craniopharyngeal duct (2) is made for transparent plastic or opaque plastics material.
3. teaching according to claim 1 stiction demonstration device, is characterized in that: described steel ball (3) is at least one piece.
4. teaching according to claim 1 stiction demonstration device, is characterized in that: described Antislip plastic material strip (5) width is not more than the insied width of casing.
5. teaching according to claim 1 stiction demonstration device, is characterized in that: described Antislip plastic material strip (5) thickness is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608454.8U CN203480736U (en) | 2013-09-30 | 2013-09-30 | Static friction force demonstrator for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608454.8U CN203480736U (en) | 2013-09-30 | 2013-09-30 | Static friction force demonstrator for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203480736U true CN203480736U (en) | 2014-03-12 |
Family
ID=50229024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320608454.8U Expired - Fee Related CN203480736U (en) | 2013-09-30 | 2013-09-30 | Static friction force demonstrator for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203480736U (en) |
-
2013
- 2013-09-30 CN CN201320608454.8U patent/CN203480736U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20180930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |