CN202929917U - Multifunctional lever demonstrator - Google Patents
Multifunctional lever demonstrator Download PDFInfo
- Publication number
- CN202929917U CN202929917U CN 201220726300 CN201220726300U CN202929917U CN 202929917 U CN202929917 U CN 202929917U CN 201220726300 CN201220726300 CN 201220726300 CN 201220726300 U CN201220726300 U CN 201220726300U CN 202929917 U CN202929917 U CN 202929917U
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- lever
- lever body
- hinged
- support
- bracket
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Abstract
The utility model discloses a multifunctional lever demonstrator which comprises a bracket, a longitudinal beam fixed on the bracket, and a lever body which is hinged to the top of the longitudinal beam. The lever body is fixed with a graduated scale. A cross beam at the top of the bracket is provided with a plurality of bracket hanging holes or bracket hanging rings. The lever body is also provided with a plurality of lever hanging holes. Two rubber bands or springs are connected between the bracket at two sides of the longitudinal beam and the lever body. Each of the rubber bands or springs is hung between any one lever hanging hole and any one bracket hanging hole or bracket hanging ring. The longitudinal beam and the lever body are hinged through a pin, and the hinge part of the longitudinal beam and the lever body is also hinged with a tension arm measuring ruler. The multifunctional lever demonstrator has the advantages that: (1) the structure is simple; (2) a fulcrum, resistance, power, a resistance arm and a power arm can be visually marked, and the understanding of students is facilitated; (3) the hinge part of the longitudinal beam and the lever body is also hinged with the tension arm measuring ruler, and the measurement of a tension arm is facilitated.
Description
Technical field
The utility model relates to a kind of junior middle school physics teaching apparatus, particularly a kind of Multifunction lever demonstration device.
Background technology
At present, in the junior middle school physics teaching process, when professor arrives lever principle, can find that classmates are very fuzzy to the equilibrium condition of the classification of lever, lever, particularly how to look for power arm and resistance arm, although more for example on textbook, to the beginner, can not be intuitively on picture in kind, concrete, vividly describe power arm, resistance arm, thereby much the classmate always makes mistakes in doing exercise.
Summary of the invention
Problem to be solved in the utility model is: the Multifunction lever demonstration device that a kind of simple in structure, demonstration lever principle that can visual pattern is provided.
in order to solve the problems of the technologies described above, Multifunction lever demonstration device of the present utility model, comprise support, be fixed on the longeron on support, be hinged on the lever body at longeron top, be fixed with rule on described lever body, the crossbeam of described top of the trellis is provided with several support hanging holes or support link, also be provided with several lever hanging holes on described lever body, all be connected with a bungee or spring between the support of described longeron both sides and lever body, described bungee or spring hang between any one regulations and parameters hanging hole and any one support hanging hole or support link.
In order to measure the length of the arm of force, Multifunction lever demonstration device of the present utility model is hinged by pin between described longeron and lever body, and the hinged place of described longeron and lever body also is hinged with an arm of force dip stick.
The beneficial effect that the utility model is obtained is: (1) is simple in structure; (2) can be visual in image indicate fulcrum, resistance, power, resistance arm and power arm, be convenient to help students to understand; (3) hinged place of longeron and lever body is hinged with an arm of force dip stick, is convenient to measure the arm of force.
Description of drawings
Fig. 1 is structural representation of the present utility model.
In figure: 1, support, 2, the support hanging hole, 3, longeron, 4, pin, 5, the lever body, 6, the lever hanging hole, 7, rule, 8, bungee, 9, bungee, 10, arm of force dip stick.
Embodiment
as shown in Figure 1, Multifunction lever demonstration device of the present utility model, the Multifunction lever demonstration device, comprise support 1, be fixed on the longeron 3 on support 1, be hinged on the lever body 5 at longeron 3 tops, be fixed with rule 7 on described lever body 5, the crossbeam at described support 1 top is provided with several support hanging holes 2 or support link, described lever body 5 is provided with several lever hanging holes 6, all be connected with a bungee 8 between the support 1 of described longeron 3 both sides and lever body 5, 9, described bungee 8, 9 hang between any one regulations and parameters hanging hole 6 and any one support hanging hole 2 or support link, be hinged by pin 4 between described longeron 3 and lever body 5, described longeron 3 also is hinged with an arm of force dip stick 10 with the hinged place of lever body 5.
Multifunction lever demonstration device of the present utility model, lever body 5 is fulcrum with the pin joint of longeron 3, the power that the bungee 9 in longeron 3 left sides applies for lever body 5 is resistance, the direction of resistance is the direction of the bungee 9 in longeron 3 left sides, rotary arm dip stick 10, exert all one's strength arm measure chi 10 perpendicular to the bungee 9 in longeron 3 left sides, and the distance from the pin joint to the vertical point is resistance arm.
The power that the bungee 8 on longeron 3 right sides applies for lever body 5 is power, the direction of power is the direction of longeron 3 right side bungees 8, rotary arm dip stick 10, the arm measure chi 10 of exerting all one's strength is perpendicular to the bungee 8 on longeron right side, and the distance from the pin joint to the vertical point is power arm.
Adjust bungee 8,9 position, less than power arm the time, power is less than resistance when resistance arm, and be laborsaving lever this moment, when resistance arm equaled power arm, power equaled resistance, and be bascule this moment, during greater than power arm, power is the effort lever this moment greater than resistance when resistance arm.
Claims (2)
1. Multifunction lever demonstration device, it is characterized in that: comprise support (1), be fixed on the longeron (3) on support (1), be hinged on the lever body (5) at longeron (3) top, be fixed with rule (7) on described lever body (5), the crossbeam at described support (1) top is provided with several support hanging hole (2) or support links, described lever body (5) is provided with several lever hanging holes (6), all be connected with a bungee (8 between the support (1) of described longeron (3) both sides and lever body (5), 9) or spring, described bungee (8, 9) or spring hang between any one regulations and parameters hanging hole (6) and any one support hanging hole (2) or support link.
2. Multifunction lever demonstration device according to claim 1, it is characterized in that: be hinged by pin (4) between described longeron (3) and lever body (5), described longeron (3) also is hinged with an arm of force dip stick (10) with the hinged place of lever body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726300 CN202929917U (en) | 2012-12-12 | 2012-12-12 | Multifunctional lever demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726300 CN202929917U (en) | 2012-12-12 | 2012-12-12 | Multifunctional lever demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202929917U true CN202929917U (en) | 2013-05-08 |
Family
ID=48219855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220726300 Expired - Fee Related CN202929917U (en) | 2012-12-12 | 2012-12-12 | Multifunctional lever demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202929917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105654818A (en) * | 2016-04-06 | 2016-06-08 | 袁静 | Simple physical experiment frame |
-
2012
- 2012-12-12 CN CN 201220726300 patent/CN202929917U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105654818A (en) * | 2016-04-06 | 2016-06-08 | 袁静 | Simple physical experiment frame |
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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: 20130508 Termination date: 20131212 |