CN105374259A - Pressure action principle demonstration device - Google Patents
Pressure action principle demonstration device Download PDFInfo
- Publication number
- CN105374259A CN105374259A CN201410429995.3A CN201410429995A CN105374259A CN 105374259 A CN105374259 A CN 105374259A CN 201410429995 A CN201410429995 A CN 201410429995A CN 105374259 A CN105374259 A CN 105374259A
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- iron
- plate
- pointer
- pressure action
- spring
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Abstract
The invention relates to a teaching supply and specially relates to a pressure action principle demonstration device. The pressure action principle demonstration device comprises a bottom plate, an indicating plate and springs. The pressure action principle demonstration device is characterized in that the bottom plate and the indicating plate are vertically connected; two parallel iron sheets are fixed to the middle of the bottom plate; two ends of each iron sheet are respectively provided with a small hole, and iron nails fix the iron sheets to the bottom plate through the small holes; each iron sheet is provided with the four springs in a welding manner, a bearing plate is placed on the springs, and an iron nail is nailed to the middle of the bearing plate; the top end of the iron nail on the bearing plate is connected with one end of an iron wire, and the other end of the iron wire is connected with a small hole in the tail end of an indicating pointer; and the indicating pointer is hinged with the indicating plate, and a hinge point is located at the center of the scale bottom edge of the indicating plate. Pressure effects are reflected through compression changes of the springs, small changes are further amplified through deflections of the pointer, the visibility is good, and the effect is good; and, through numerical value changes, the pressure action principle is more visual and is also more conductive to understanding.
Description
(1) technical field
The present invention relates to a kind of realia, particularly a kind of pressure action presentation device of theory.
(2) background technology
About in the demonstration of pressure and pressure and lifting surface area relation in junior physics teaching material, usually nail on long iron nail in the corner of one piece of little plank and make stool shape, the spike of four pin is placed on one piece of sponge, counterweight placed by plank, counterweight is more, and sponge sinking degree is larger; If be inverted by square stool, plank contacts with sponge, and because contact area becomes large, when placing the counterweight of the weight that communicates, sponge distortion is much smaller.The relation of pressure and pressure and contact area is drawn by so simple demonstration, but it is undesirable to the wooden stool observing effect that sink during this experimental demonstration, and can only show that pressure action effect is relevant with pressure and lifting surface area, but concrete quantitative relation can not be drawn, student can not be allowed to have more directly deep understanding.
(3) summary of the invention
The present invention, in order to make up the deficiencies in the prior art, provides and a kind ofly can know the pressure action presentation device of theory representing quantitative relationship between pressure and pressure and contact area.
The present invention is achieved through the following technical solutions:
A kind of pressure action presentation device of theory, comprises base plate, indicator board and spring, it is characterized in that: described base plate is vertically connected with indicator board; The parallel iron plate of two rows is fixed with in the middle of described base plate; Described iron plate two ends are respectively provided with an aperture, and iron plate is fixed on base plate by aperture by iron nail; Described iron plate is respectively welded with four springs, this spring is placed with bearing plate, in the middle of this bearing plate, nail has an iron nail; Described iron nail top is connected with an iron wire, and this iron wire other end is connected with pointer afterbody aperture; Described pointer and indicator board hinged, pin joint is positioned at center, indicator board scale base.
Described indicator board there is scale with marker pen mark.
Described spring is soft spring.
Described pointer is hinged and is a little divided into afterbody and pin portion, and pin minister degree is 3-5 times of tail length.
When the present invention uses, base is set level, bearing plate is placed on spring, adjustment position, pointer is allowed to refer at zero graduation place, because the compression of spring is directly proportional to the external force be subject to, so place the counterweight of Different Weight on bearing plate, spring deformation is different, bearing plate also moves down along with spring deformation, involves iron wire and drives pointer to indicate different scales.Due to pointer and indicator board hinged, pointer is hinged and is a little divided into afterbody and pin portion, pin minister degree is 3-5 times of tail length, pointer is made to become a lever, due to lever principle, as long as spring has deformation a little, pointer can be that axle rotates with pin joint, an obvious numerical value will be shown, thus significantly can read the size of change.On bearing plate, put into counterweight successively, different values can be read by pointer, pressure can be obtained and be directly proportional to pressure; Flat board is rotated the quantity changing institute pressing spring, can pressure be obtained by the instruction of pointer and lifting surface area is inversely proportional to.
Structure of the present invention is simple, easy to use, reasonable in design, applying flexible, and by the effect of the compression variation reflection pressure of spring, be exaggerated little change by the deflection of pointer again, visibility is large, effective; And can show that pressure is directly proportional to pressure, the quantitative relationship be inversely proportional to lifting surface area, showed by numerical value and be more intuitively also more beneficial to understanding; Experiment equipment of the present invention is simple, practical, should be widely promoted.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is structural representation of the present invention.
In figure, 1 base, 2 indicator boards, 3 iron plates, 4 springs, 5 bearing plates, 6 iron nails, 7 pointers, 8 iron wires.
(5) embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.This embodiment comprises base plate 1, indicator board 2 and spring 3, and described base plate 1 is vertically connected with indicator board 2; The parallel iron plate 4 of two rows is fixed with in the middle of described base plate 1; Described iron plate 4 two ends are respectively provided with an aperture, and iron plate 4 is fixed on base plate 1 by aperture by iron nail; Described iron plate 4 is respectively welded with four springs 3, this spring 3 is placed with bearing plate 5, in the middle of this bearing plate 5, nail has an iron nail 6; Described iron nail 6 top is connected with an iron wire 8, and this iron wire 8 other end is connected with pointer 7 afterbody aperture; Described pointer 7 is hinged with indicator board 2, and pin joint is positioned at center, indicator board 2 scale base.Described indicator board 2 there is scale with marker pen mark.Described spring 3 is soft spring.Described pointer 7 is hinged and is a little divided into afterbody and pin portion, and pin minister degree is 3-5 times of tail length.
When the present invention uses, base 1 is set level, bearing plate 5 is placed on spring 3, adjustment position, pointer 7 is allowed to refer at zero graduation place, because the compression of spring 3 is directly proportional to the external force be subject to, so place the counterweight of Different Weight on bearing plate 5, spring 3 deformation is different, bearing plate 5 also moves down along with spring 3 deformation, involves iron wire 8 and drives pointer 7 to indicate different scales.Because pointer 7 and indicator board 2 are hinged, pointer 7 is hinged and is a little divided into afterbody and pin portion, pin minister degree is 3-5 times of tail length, pointer is made to become a lever, due to lever principle, as long as spring 3 has deformation a little, pointer 7 will show an obvious numerical value, thus significantly can read the size of change.On bearing plate 5, put into counterweight successively, different values can be read by pointer, pressure can be obtained and be directly proportional to pressure; Such as on bearing plate 5, place a counterweight, pointer 7 rotates instruction on scale one, places two counterweight pointers 7 and can refer on scale two, by that analogy, can obtain pressure and be directly proportional to pressure.Bearing plate 5 is rotated the quantity changing institute pressing spring, can pressure be obtained by the instruction of pointer and lifting surface area is inversely proportional to.Such as bearing plate 5 is pressed on eight springs 3, and pointer 7 rotates instruction on scale one, and bearing plate 5 is pressed on four springs 3, and pointer 7 can refer on scale two, by that analogy, can obtain pressure and lifting surface area is inversely proportional to.
Claims (4)
1. a pressure action presentation device of theory, comprises base plate (1), indicator board (2) and spring (3), it is characterized in that: described base plate (1) is vertically connected with indicator board (2); The parallel iron plate of two row (4) is fixed with in the middle of described base plate (1); Described iron plate (4) two ends are respectively provided with an aperture, and iron plate (4) is fixed on base plate (1) by aperture by iron nail; Described iron plate (4) is respectively welded with four springs (3), this spring (3) is placed with bearing plate (5), in the middle of this bearing plate (5), nail has an iron nail (6); Described iron nail (6) top is connected with an iron wire (8), and this iron wire (8) other end is connected with pointer (7) afterbody aperture; Described pointer (7) is hinged with indicator board (2), and pin joint is positioned at center, indicator board (2) scale base.
2. pressure action presentation device of theory according to claim 1, is characterized in that: described indicator board (2) has scale with marker pen mark.
3. pressure action presentation device of theory according to claim 1, is characterized in that: described spring (3) is soft spring.
4. pressure action presentation device of theory according to claim 1, is characterized in that: described pointer (7) is hinged and is a little divided into afterbody and pin portion, and pin minister degree is 3-5 times of tail length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410429995.3A CN105374259A (en) | 2014-08-28 | 2014-08-28 | Pressure action principle demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410429995.3A CN105374259A (en) | 2014-08-28 | 2014-08-28 | Pressure action principle demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105374259A true CN105374259A (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410429995.3A Pending CN105374259A (en) | 2014-08-28 | 2014-08-28 | Pressure action principle demonstration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105374259A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840327A (en) * | 2016-12-22 | 2017-06-13 | 深圳众思科技有限公司 | Weight acquisition methods and device |
-
2014
- 2014-08-28 CN CN201410429995.3A patent/CN105374259A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840327A (en) * | 2016-12-22 | 2017-06-13 | 深圳众思科技有限公司 | Weight acquisition methods and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160302 |
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| WD01 | Invention patent application deemed withdrawn after publication |