CN202258044U - Lever for teaching - Google Patents
Lever for teaching Download PDFInfo
- Publication number
- CN202258044U CN202258044U CN2011203985789U CN201120398578U CN202258044U CN 202258044 U CN202258044 U CN 202258044U CN 2011203985789 U CN2011203985789 U CN 2011203985789U CN 201120398578 U CN201120398578 U CN 201120398578U CN 202258044 U CN202258044 U CN 202258044U
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- Prior art keywords
- lever
- chi
- teaching
- link
- screens
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Abstract
The utility model discloses a lever for teaching. The lever comprises a base (1), a support (2), a lever ruler (3) and at least two hanging rings (4), wherein a fulcrum (3.1) in the center of the lever ruler (3) is hinged with the upper part of the support (2); scales are symmetrically engraved on two sides of the fulcrum (3.1) of the lever ruler (3); grooves (3.2) are formed on both the front surface and the back surface of the lever ruler (3); a plurality of clamping positions (3.3) are uniformly arranged on the lower groove surfaces of the grooves (3.2); and each of the hanging rings (4) is clamped in one of the clamping positions (3.3) in a sliding mode. Through the lever for the teaching, a plurality of mechanical equilibrium combinations can be used for performing a force equilibrium experiment, and the distance of a force arm in the experiment process is controlled well to ensure that the experiment can be performed successfully.
Description
Technical field
The utility model relates to the science and education Instrument technology field, and lever is used in the teaching that is specifically related to use when a kind of physical mechanics is imparted knowledge to students.
Background technology
The junior physics mechanics part is relevant for the teaching of equilibrium of forces and lever utilization, teacher lecture start to put into practice with the student in, often need use teaching and using lever.Teaching is the educational aid of the research equilibrium of forces of use in the teaching with lever, generally comprises base, support and lever chi.The center of lever chi is the fulcrum of lever, is carved with scale symmetrically on the lever chi on fulcrum both sides, and is provided with the link that is used to catch on counterweight.Can know the distance of the arm of force through scale, the counterweight that combines link to catch on again just can carry out the research of equilibrium of forces (power * power arm=resistance * resistance arm).
Lever is used in the teaching of prior art, and its link is limited several, and is fixedly set in lever chi below, and is as shown in Figure 1.This teaching can only be selected limited several mechanical balance combinations for use with lever when carrying out the equilibrium of forces experiment, be unfavorable for that the student accomplishes the understanding to lever principle through the practice of a plurality of combinations, also is unfavorable for opening up student's divergent thinking.The someone had designed other a kind of teaching and used lever afterwards, and its link is socketed on the lever chi, can slide arbitrarily along the lever chi, and was as shown in Figure 2.This teaching can select for use the combination of multiple mechanical balance to accomplish practice and understanding to lever principle with lever, but because link can slide arbitrarily with lever, causes in the experimentation distance of the arm of force to be not easy control, brings difficulty for the smooth completion of experiment.
The utility model content
The utility model technical matters to be solved provides a kind of teaching and uses lever; This teaching can select for use the combination of multiple mechanical balance to accomplish the equilibrium of forces experiment with lever; And the distance control of the arm of force is good in experimentation, can guarantee carrying out smoothly of experiment.
For addressing the above problem, the utility model provides a kind of teaching to comprise base, support, lever chi and link with lever, and the fulcrum at lever chi center is articulated in support top, and scale is carved with on the fulcrum both sides symmetrically on the lever chi.The positive and negative surface of said lever chi evenly is provided with groove, and the following groove face of groove is provided with a plurality of screens, at least two of said links, and each link slidably is connected in one of them screens.
After adopting above structure, the utility model compared with prior art has the following advantages: the utility model is provided with groove on the surface of lever chi; A plurality of screens are set on the groove; Link slidably is connected in screens, and promptly link can be changed between a plurality of screens, and this can increase the combination of equilibrium of forces; Make the student can select for use the combination of multiple mechanical balance to accomplish practice and understanding, help strengthening teaching efficiency, developing student's divergent thinking lever principle.In addition, link is connected in screens, and link can not be horizontally slipped when experiment, helps the convenient distance of accurately controlling the arm of force in experimentation, thereby guarantees carrying out smoothly of experiment.
Said link slidably is connected in screens and is meant that but the elasticity peg of two foldings of link is connected in two grooves on the positive and negative surface of lever chi.Such structure just is not easy to horizontally slip after making link in a single day be connected in a certain screens, accurately controls the distance of the arm of force, guarantees to test to carry out smoothly.
Evenly be provided with a plurality of screens on the below groove face of said groove and be meant that specifically each the centimeter scale below on the lever chi is provided with a screens.This has not only increased the balanced combination of equilibrium of forces experiment, and screens is positioned at and helps the calculating of student to arm of force distance below each centimeter scale, improves teaching efficiency.
Said cantilever tip is fixedly connected with spacing top, spacing top be positioned at the lever chi directly over.This has effectively prevented to cause lever chi out of trim and perk causes the dangerous accident of counterweight landing and support tilt to take place when lever chi one end counterweight is overweight.
Said link is four, and the fulcrum both sides are each two on the lever chi.Respectively there are two links on the fulcrum both sides on the lever chi, make this teaching can select for use more mechanical balance to make up with lever and accomplish the equilibrium of forces experiment.
Description of drawings
Shown in Figure 1 is to impart knowledge to students with the structural representation of lever in the prior art.
Shown in Figure 2 is to impart knowledge to students with the structural representation of lever in the prior art.
Shown in Figure 3 is the structural representation of the utility model teaching with lever.
Wherein: 1, base; 2, support; 3, lever chi; 3.1, fulcrum; 3.2, groove; 3.3, screens; 4, link; 4.1, the elasticity peg; 5, spacing top.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is made further detailed description.
As shown in Figure 3; The utility model teaching comprises base 1, support 2, lever chi 3 and link 4 with lever; The fulcrum 3.1 at lever chi 3 centers is articulated in support 2 tops, and scale is carved with on fulcrum 3.1 both sides symmetrically on the lever chi 3, and the lower end of support 2 is fixed on the base 1.The positive and negative surface of lever chi 3 is provided with groove 3.2, evenly is provided with a plurality of screens 3.3 on the following groove face of groove 3.3, and each the centimeter scale below that is specially on the lever chi 3 is provided with a screens 3.3.Link 4 slidably is connected in screens 3.3, but the elasticity peg 4.1 that is specially two foldings of link 4 is connected in two grooves 3.2 on lever chi 3 positive and negative surfaces, and link 4 can pass through groove 3.2 dislocation between a plurality of screens 3.3 like this.Link 4 is four in the present embodiment, and fulcrum 3.1 both sides are each two on the lever chi 3.Can certainly be other identical quantity of both sides number, like both sides each 1 or 3 or other.Support 2 tops are fixedly connected with a spacing top 5, spacing top 5 be positioned at lever chi 3 directly over.
Above embodiment be to the explanation of the utility model with explain that further rather than to the restriction of the utility model, any modification of in the interest field of the utility model, being done all falls into the protection domain of the utility model.
Claims (5)
1. lever is used in a teaching; Comprise base (1), support (2), lever chi (3) and link (4); The fulcrum (3.1) at lever chi (3) center is articulated in support (2) top; Lever chi (3) is gone up fulcrum (3.1) both sides and is carved with scale symmetrically, and it is characterized in that: the positive and negative surface of said lever chi (3) is provided with groove (3.2), evenly is provided with a plurality of screens (3.3) on the following groove face of groove (3.2); (4) at least two of said links, each link (4) slidably is connected in one of them screens (3.3).
2. lever is used in teaching according to claim 1, it is characterized in that: said link (4) be connected in slidably that screens (3.3) is meant link (4) but the elasticity peg (4.1) of two foldings be connected in two grooves (3.2) on the positive and negative surface of lever chi (3).
3. lever is used in teaching according to claim 1, it is characterized in that: evenly be provided with a plurality of screens (3.3) on the following groove face of said groove (3.2) and be meant that specifically each the centimeter scale below on the lever chi (3) is provided with a screens (3.3).
4. lever is used in teaching according to claim 1, it is characterized in that: said support (2) top is fixedly connected with spacing top (5), spacing top (5) be positioned at lever chi (3) directly over.
5. lever is used in teaching according to claim 1, it is characterized in that: said link (4) is four, and lever chi (3) is gone up each two on fulcrum (3.1) both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203985789U CN202258044U (en) | 2011-10-19 | 2011-10-19 | Lever for teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203985789U CN202258044U (en) | 2011-10-19 | 2011-10-19 | Lever for teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202258044U true CN202258044U (en) | 2012-05-30 |
Family
ID=46119254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203985789U Expired - Fee Related CN202258044U (en) | 2011-10-19 | 2011-10-19 | Lever for teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202258044U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810274A (en) * | 2012-08-03 | 2012-12-05 | 昆山旭虹精密零组件有限公司 | Teaching demonstration balance |
| CN103927914A (en) * | 2013-01-11 | 2014-07-16 | 江南大学 | Moment disc with moment arm ruler |
| CN107527538A (en) * | 2017-09-19 | 2017-12-29 | 贾雨祺 | A kind of Physics Learning can use lever principle apparatus for demonstrating |
| CN111862736A (en) * | 2020-09-09 | 2020-10-30 | 河南四季竹信息科技有限公司 | Lever principle experimental instrument and lever principle experimental instrument teaching data acquisition system |
| CN114112649A (en) * | 2021-12-24 | 2022-03-01 | 华北电力大学（保定） | Pure mechanical transverse load stress testing machine |
-
2011
- 2011-10-19 CN CN2011203985789U patent/CN202258044U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810274A (en) * | 2012-08-03 | 2012-12-05 | 昆山旭虹精密零组件有限公司 | Teaching demonstration balance |
| CN103927914A (en) * | 2013-01-11 | 2014-07-16 | 江南大学 | Moment disc with moment arm ruler |
| CN107527538A (en) * | 2017-09-19 | 2017-12-29 | 贾雨祺 | A kind of Physics Learning can use lever principle apparatus for demonstrating |
| CN111862736A (en) * | 2020-09-09 | 2020-10-30 | 河南四季竹信息科技有限公司 | Lever principle experimental instrument and lever principle experimental instrument teaching data acquisition system |
| CN114112649A (en) * | 2021-12-24 | 2022-03-01 | 华北电力大学（保定） | Pure mechanical transverse load stress testing machine |
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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: 20120530 Termination date: 20191019 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |