CN202720803U - A lever teaching aid used for physics teaching - Google Patents
A lever teaching aid used for physics teaching Download PDFInfo
- Publication number
- CN202720803U CN202720803U CN 201220353170 CN201220353170U CN202720803U CN 202720803 U CN202720803 U CN 202720803U CN 201220353170 CN201220353170 CN 201220353170 CN 201220353170 U CN201220353170 U CN 201220353170U CN 202720803 U CN202720803 U CN 202720803U
- Authority
- CN
- China
- Prior art keywords
- cross bar
- sliding block
- baffle ring
- transparent slide
- lifting rope
- 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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- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
Provided is a lever teaching aid used for physics teaching. The lever teaching aid comprises a cone-shape pedestal, a left transparent sliding block, a right transparent sliding block, a left baffle ring, a right baffle ring, lifting ropes, and counterweights. The bottom of a supporting rod is fixedly connected with the cone-shape pedestal. The top of the supporting rod is hinged to the middle of a cross bar. The left transparent sliding block is slidably sleeved on the left part of the cross bar, while the right transparent sliding block is slidably sleeved on the right part of the cross bar. The left baffle ring is mounted on the left end of the cross bar, while the right baffle ring is mounted on the right end of the cross bar. The middle of the bottom of the left transparent sliding block is connected with a first group of counterweight through a lifting rope. A sliding rod slidably passes through a vertical sliding block which is slidably mounted on the supporting rod. And the vertical sliding block is locked tightly on the supporting rod and one end of the sliding rod through a locking button. A pulley and the other end of the sliding rod are hinged to each other through a pin roll from front to back. A protractor is fixedly mounted on the rear end face of the sliding rod. One end of a second lifting rope is fixedly mounted on the bottom of the right transparent sliding block, while the other end of the second lifting rope is fixedly connected with a second group of counterweight through a pulley. The lever teaching aid is used for physics lever teaching.
Description
Technical field
The utility model relates to a kind of physical teaching aid, is specifically related to a kind of lever used for physics teaching, belongs to teaching technique with the apparatus field.
Background technology
In existing physics teaching, need the student is demonstrated in many situations, so that better Classroom theory knowledge is combined with practice.Many concepts in the physics teaching material, law, rule are all introduced by experiment, are derived and verify, especially in the mechanics teaching, during the experimental lever equilibrium condition, the length of lever is nonadjustable, obtain multi-group data and finish with regard to the lever that needs different length, its shortcoming is troublesome poeration, wastes time and energy, not portable, efficiency of teaching is low.
Summary of the invention
The purpose of this utility model be for solve troublesome poeration that existing experimental lever apparatus exists, waste time and energy, not portable, problem that efficiency of teaching is low, and then provide a kind of lever used for physics teaching.
The technical solution of the utility model is: a kind of lever used for physics teaching, lever used for physics teaching comprises cross bar, pole and sloped footing, left transparent slide, right transparent slide, left baffle ring, right baffle ring, lifting rope and weights, pole vertically arranges, its bottom is fixedly connected with sloped footing, the upper end of pole and the center of cross bar are hinged, be carved with scale mark on the cross bar, left transparent slide slip cap is contained on the left half of cross bar, right transparent slide slip cap is contained on the right half of cross bar, left baffle ring is installed in the left end of cross bar, right baffle ring is installed in the right-hand member of cross bar, and left transparent slide lower end is connected with first group of counterweight by the first lifting rope; Sliding bar slides and is located on the longitudinal sliding block, longitudinal sliding block is slidingly arranged on the pole, and all tight by the locking twistlock between the end of longitudinal sliding block and pole and sliding bar, the other end of pulley and sliding bar is hinged by bearing pin successively from front to back, protractor is packed on the rear end face of sliding bar, one end of the second lifting rope is packed in the lower end of right transparent slide, and the other end of the second lifting rope is connected with second group of counterweight by pulley.
The utility model compared with prior art has following effect: the utility model is adjusted the arm of force by the position of stirring the slide block on the cross bar, has saved the time of changing lever; The scale mark of scribing on the cross bar and transparent slide, so that the operator can directly read arm of force size, easy to use; Slide block landing cross bar when the baffle ring at cross bar two ends effectively prevents maloperation; Adopt sloped footing to prevent the teaching aid rollover.In addition the utility model also have simple in structure, simple to operate, time saving and energy saving, be easy to carry and advantage that efficiency of teaching is high.
Description of drawings
Fig. 1 is one-piece construction figure of the present utility model.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, the lever used for physics teaching of present embodiment comprises cross bar 1, pole 2 and sloped footing 3, left transparent slide 4, right transparent slide 5, left baffle ring 6, right baffle ring 7, lifting rope and weights, pole 2 vertically arranges, its bottom is fixedly connected with sloped footing 3, the center of the upper end of pole 2 and cross bar 1 is hinged, be carved with scale mark 8 on the cross bar 1, left transparent slide 4 slip caps are contained on the left half of cross bar 1, right transparent slide 5 slip caps are contained on the right half of cross bar 1, left baffle ring 6 is installed in the left end of cross bar 1, right baffle ring 7 is installed in the right-hand member of cross bar 1, and left transparent slide 4 lower ends are connected with first group of counterweight 10 by the first lifting rope 9; Sliding bar 13 slides and is located on the longitudinal sliding block 16, longitudinal sliding block is slidingly arranged on the pole, and all turn round 17 lockings by locking between the end of longitudinal sliding block and pole and sliding bar, the other end of pulley 14 and sliding bar is hinged by bearing pin successively from front to back, protractor 19 is packed on the rear end face of sliding bar, one end of the second lifting rope 18 is packed in the lower end of right transparent slide, and the other end of the second lifting rope is connected with second group of counterweight 15 by pulley.
Described physics embodiment two: present embodiment is described in conjunction with Fig. 1, the lever used for physics teaching of present embodiment also comprises left lock-screw 11 and right lock-screw 12, left lock-screw 11 is threaded in the upper end of left transparent slide 4, and right lock-screw 12 is threaded in the upper end of right transparent slide 5.So arrange, adjust the slide position after, by lock-screw slide block is fixed on the cross bar, the upper end that lock-screw is threaded in slide block is in order to prevent screw scratching scale mark in the long-term use procedure.Other composition is identical with embodiment one with annexation.
Embodiment three: in conjunction with Fig. 1 present embodiment is described, the sloped footing 3 of present embodiment is the rubber sloped footing.Other composition is identical with embodiment one or two with annexation.
Claims (3)
1. lever used for physics teaching, lever used for physics teaching comprises cross bar (1), pole (2) and sloped footing (3), left transparent slide (4), right transparent slide (5), left baffle ring (6), right baffle ring (7), lifting rope and weights, it is characterized in that: pole (2) vertically arranges, its bottom is fixedly connected with sloped footing (3), the center of the upper end of pole (2) and cross bar (1) is hinged, be carved with scale mark (8) on the cross bar (1), left transparent slide (4) slip cap is contained on the left half of cross bar (1), right transparent slide (5) slip cap is contained on the right half of cross bar (1), left baffle ring (6) is installed in the left end of cross bar (1), right baffle ring (7) is installed in the right-hand member of cross bar (1), and left transparent slide (4) lower end is connected with first group of counterweight (10) by the first lifting rope (9); Sliding bar (13) slides and is located on the longitudinal sliding block (16), longitudinal sliding block (16) is slidingly arranged on the pole (2), and all turn round (17) locking by locking between the end of longitudinal sliding block (16) and pole (2) and sliding bar (13), the other end of pulley (14) and sliding bar (13) is hinged by bearing pin successively from front to back, protractor (19) is packed on the rear end face of sliding bar (13), one end of the second lifting rope (18) is packed in the lower end of right transparent slide (5), and the other end of the second lifting rope (18) is affixed by pulley (14) and second group of counterweight (15).
2. described lever used for physics teaching according to claim 1, it is characterized in that: lever used for physics teaching also comprises left lock-screw (11) and right lock-screw (12), left lock-screw (11) is threaded in the upper end of left transparent slide (4), and right lock-screw (12) is threaded in the upper end of right transparent slide (5).
3. described lever used for physics teaching according to claim 1 and 2, it is characterized in that: sloped footing (3) is the rubber sloped footing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220353170 CN202720803U (en) | 2012-07-20 | 2012-07-20 | A lever teaching aid used for physics teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220353170 CN202720803U (en) | 2012-07-20 | 2012-07-20 | A lever teaching aid used for physics teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202720803U true CN202720803U (en) | 2013-02-06 |
Family
ID=47622617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220353170 Expired - Fee Related CN202720803U (en) | 2012-07-20 | 2012-07-20 | A lever teaching aid used for physics teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202720803U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445112A (en) * | 2015-12-01 | 2016-03-30 | 河海大学 | Device for measuring tensile strength of plant root |
-
2012
- 2012-07-20 CN CN 201220353170 patent/CN202720803U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445112A (en) * | 2015-12-01 | 2016-03-30 | 河海大学 | Device for measuring tensile strength of plant root |
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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: 20130206 Termination date: 20140720 |
|
| EXPY | Termination of patent right or utility model |