CN202434096U - Force resolution demonstration device - Google Patents
Force resolution demonstration device Download PDFInfo
- Publication number
- CN202434096U CN202434096U CN2011205550847U CN201120555084U CN202434096U CN 202434096 U CN202434096 U CN 202434096U CN 2011205550847 U CN2011205550847 U CN 2011205550847U CN 201120555084 U CN201120555084 U CN 201120555084U CN 202434096 U CN202434096 U CN 202434096U
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- CN
- China
- Prior art keywords
- support
- making
- force
- concerted effort
- rod
- 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
The utility model discloses a force resolution demonstration device which comprises a magnetic back panel. A support is arranged on the magnetic back panel and is provided with a plurality of branches, the support is attached to the surface of the magnetic back panel, a support rod and a resultant force indicating rod are arranged on the outside of the support, central points of the support, the support rod and the resultant force indicating rod are connected through a pin shaft, the support, the support rod and the resultant force indicating rod can rotate along the pin shaft, and a coiling support point is respectively arranged on each branch of the support and the end portion of the support rod. The force resolution demonstration device further comprises an elastic rope which bypasses from a pair of coiling support points and two ends of the resultant force indicating rod to tighten the elastic rope. Strong magnetic blocks are arranged on the bottom faces of all the support, the support rod and the resultant force indicating rod which are absorbed on the surface of the magnetic back panel through the strong magnetic blocks. The force resolution demonstration device is provided with a plurality of coiling support points, can resolve resultant force into a plurality of groups of component force so as to intuitively display the principle that the resultant force can be resolved into a plurality of groups of the component force.
Description
Technical field
The utility model relates to a kind of teaching demonstration instrument, relates in particular to a kind of resolution of force apparatus for demonstrating.
Background technology
If its action effect of power effect during with several power acting in conjunction is identical, this power is called making a concerted effort of those several power.Ask making a concerted effort of several power, make power synthetic, otherwise, be resolution of force.Positive and negative sum rule is followed in the synthetic and decomposition of power on the same straight line, and parallelogram law is followed in synthesizing and decomposing of power at an angle to each other.Carry out resolution of force and generally such step is arranged all with synthetic: the power that receives object all is drawn on the figure; Analyze the action effect of each power; Decompose concrete power.The synthetic parallelogram rule of power should put forward on the basis of experiment, in teaching, can combine lecture experiment and student experimenting well.Resolution of force is the synthetic inverse operation of power; Make the student understand parallelogram rule be the synthesising law of power also be the resolution of force rule; The parallelogram that known two component are made is unique, and what obtain also is unique with joint efforts, and a known component of making every effort to it then can be made numerous parallelogram; Numerous separating arranged, with demonstration teaching aid it is demonstrated out that the student is sharpened understanding.
The utility model content
The purpose of the utility model provides a kind of resolution of force apparatus for demonstrating, a power is decomposed into two power has or not array component to demonstrate.
The utility model is that the technical scheme that its technical matters of solution is adopted is,
The resolution of force apparatus for demonstrating comprises a magnetic backboard, and said magnetic backboard is provided with a support; This support has a plurality of branches, and support is attached at the magnetic back plate surface, and the support outside is provided with the support bar and the indicator stem of making a concerted effort; The central point of support, support bar and the indicator stem of making a concerted effort is connected by bearing pin; Support, support bar and the indicator stem of making a concerted effort can be around this bearing pin rotations, and the end of each branch of support and support bar is respectively equipped with the coiling fulcrum, also comprises an elastic threads; This elastic threads is walked around from the two ends of a pair of coiling fulcrum and the indicator stem of making a concerted effort, and makes elastic threads keep tight; The bottom surface of said support, support bar and the indicator stem of making a concerted effort is equipped with strong magnetic piece, and support, support bar and the indicator stem of making a concerted effort are adsorbed in the magnetic back plate surface through strong magnetic piece.
The advantage of the utility model is; This apparatus for demonstrating is provided with a plurality of coiling fulcrums; When carrying out the resolution of force lecture experiment, can make a concerted effort to be decomposed into polycomponent power, thereby show that intuitively a power can be decomposed into the reason of countless component power same; And adopt strong magnetic piece to be attached on the magnetic backboard, make its convenient demonstration operation.
Description of drawings
Fig. 1 is the structural representation of the resolution of force apparatus for demonstrating of the utility model proposition.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand with effect and understand, below in conjunction with illustrating and specific embodiment, further set forth the utility model.
As shown in Figure 1, the resolution of force apparatus for demonstrating that the utility model proposes comprises magnetic backboard 1, and said magnetic backboard 1 is provided with support 2; This support 2 has four branches, and support 2 is attached at magnetic backboard 1 surface, and support 2 outsides are provided with the support bar 3 and the indicator stem 4 of making a concerted effort; The central point of support 2, support bar 3 and the indicator stem 4 of making a concerted effort is connected by bearing pin 5; The support 2, support bar 3 and the indicator stem 4 of making a concerted effort can be around these bearing pin 5 rotations, and the end of support 2 each branch and support bar 3 is respectively equipped with the coiling fulcrum, for example scheme to have coiling fulcrum 211 in first branch 21 of medium-height trestle; Has coiling fulcrum 221 in its second branch 22; Support bar 3 two ends have coiling fulcrum 31 and coiling fulcrum 32, also comprise elastic threads 6, and this elastic threads 6 is walked around from the two ends of coiling fulcrum 31, coiling fulcrum 32 and the indicator stem 4 of making a concerted effort; Make elastic threads 6 keep tight, form parallelogram; The bottom surface of said support 2, support bar 3 and the indicator stem 4 of making a concerted effort is equipped with strong magnetic piece, and support 2, support bar 3 and the indicator stem 4 of making a concerted effort are adsorbed in the magnetic back plate surface through strong magnetic piece.
This apparatus for demonstrating when carrying out the resolution of force lecture experiment, can make elastic threads form a plurality of parallelogram owing to be provided with a plurality of coiling fulcrums, makes a concerted effort to be decomposed into polycomponent power with same, thereby shows that intuitively a power can be decomposed into the reason of countless component power.
More than show and described the advantage of ultimate principle, principal character and the utility model of the utility model.The technician of the industry should understand; The principle of describing in the foregoing description and the instructions that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.
Claims (2)
1. the resolution of force apparatus for demonstrating comprises a magnetic backboard, it is characterized in that; Said magnetic backboard is provided with a support, and this support has a plurality of branches, and support is attached at the magnetic back plate surface; The support outside is provided with the support bar and the indicator stem of making a concerted effort, and the central point of support, support bar and the indicator stem of making a concerted effort is connected by bearing pin, and support, support bar and the indicator stem of making a concerted effort can be around this bearing pin rotations; The end of each branch of support and support bar is respectively equipped with the coiling fulcrum; Also comprise an elastic threads, this elastic threads is walked around from the two ends of a pair of coiling fulcrum and the indicator stem of making a concerted effort, and makes elastic threads keep tight.
2. resolution of force apparatus for demonstrating according to claim 1 is characterized in that, the bottom surface of said support, support bar and the indicator stem of making a concerted effort is equipped with strong magnetic piece, and support, support bar and the indicator stem of making a concerted effort are adsorbed in the magnetic back plate surface through strong magnetic piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205550847U CN202434096U (en) | 2011-12-28 | 2011-12-28 | Force resolution demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205550847U CN202434096U (en) | 2011-12-28 | 2011-12-28 | Force resolution demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202434096U true CN202434096U (en) | 2012-09-12 |
Family
ID=46783524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205550847U Expired - Fee Related CN202434096U (en) | 2011-12-28 | 2011-12-28 | Force resolution demonstration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202434096U (en) |
-
2011
- 2011-12-28 CN CN2011205550847U patent/CN202434096U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20121228 |