CN202677674U - Physical lever teaching aid convenient to carry and demonstrate - Google Patents
Physical lever teaching aid convenient to carry and demonstrate Download PDFInfo
- Publication number
- CN202677674U CN202677674U CN 201220385718 CN201220385718U CN202677674U CN 202677674 U CN202677674 U CN 202677674U CN 201220385718 CN201220385718 CN 201220385718 CN 201220385718 U CN201220385718 U CN 201220385718U CN 202677674 U CN202677674 U CN 202677674U
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- blackboard
- counterweight
- spool
- lifting rope
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Abstract
The utility model discloses a physical lever teaching aid convenient to carry and demonstrate, which relates to a physical lever teaching aid. The physical lever teaching aid solves the problems that the existing physical lever teaching aid is required to be matched with drawing on a blackboard when a teacher give lessons, can not ensure that students clearly know the relation of different parameters in the lever balance principle, not only affects the study effect of the students, but also enhances the teaching burden of the teacher. A supporting rod is rotationally arranged at the center of a base; the center of a cross rod is hinged with the upper part of the supporting rod; a left sliding block and a right sliding block are respectively and glidingly sleeved on two sides of the cross rod; a scroll blackboard is arranged above the cross rod; a sliding rod glidingly penetrates through a longitudinal sliding block; the longitudinal sliding block is glidingly arranged on the supporting rod; a pulley and the other end of the sliding rod are mutually hinged through a hinge pin from the front part to the rear part in sequence; one end of an expansion link is detachably arranged in the middle of the lower end of the right sliding block; and the other end of the expansion link is hinged with the other end of the sliding rod. The physical lever teaching is applied to physical lever experiments.
Description
Technical field
The utility model relates to a kind of lever used for physics teaching, is specifically related to a kind of lever used for physics teaching that is easy to carry and demonstrates.
Background technology
Be called lever to the hard objects that under the effect of power, can center on the point of fixity rotation in the physics, lever principle is one of important content of courses, therefore lever used for physics teaching seems particularly important in teaching process, the patent No. is 2010202228556, June 11 2010 applying date, name is called in the patent of " a kind of lever used for physics teaching " and discloses a kind of effect of expressing leverage power that can be very vivid, and the equilibrium condition of studying preferably lever, improved student's interest, but existing lever used for physics teaching need to cooperate blackboard to draw when teacher gives lessons to be used jointly, can't allow relation between the very clear mutual confirmation lever balance theory different parameters of student, not only affect student's the effect of listening to the teacher, also increased teacher's teaching load.
Summary of the invention
The purpose of this utility model is need to cooperate the common use of blackboard drawing in order to solve existing lever used for physics teaching when teacher gives lessons, can't allow relation between the very clear mutual confirmation lever balance theory different parameters of student, not only affected student's the effect of listening to the teacher, also increased the problem of teacher's teaching load, and then a kind of lever used for physics teaching that is easy to carry and demonstrates is provided.
The technical solution of the utility model is: a kind of lever used for physics teaching that is easy to carry and demonstrates comprises base, pole, cross bar, left slider, right slide block, the first lifting rope, the second lifting rope, first group of counterweight and second group of counterweight, pole rotatably be arranged on base in the heart, cross bar is provided with scale, the center of cross bar and the upper articulation of pole, left slider and right slide block respectively slip cap are contained in the both sides of cross bar, first group of counterweight and second group of counterweight are separately positioned on the below of left slider and right slide block, and between left slider and right slide block and first group of counterweight and the second group of counterweight respectively by the first lifting rope be connected lifting rope and be connected, described lever used for physics teaching also comprises the spool blackboard, sliding bar, expansion link, longitudinal sliding block, pulley, protractor, locking is turned round and a plurality of snap rings, the spool blackboard is arranged on the top of cross bar, and spool blackboard and pole are hinged, have a plurality of draw-in grooves on the rear end face of base, a plurality of snap rings are set up in parallel the lower end at the spool blackboard, after the spool blackboard launches, be installed with a snap ring in each draw-in groove on the base, sliding bar slides and is located on the longitudinal sliding block, longitudinal sliding block slidably is 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 expansion link, one end of expansion link detachably is arranged on the middle part, lower end of right slide block, the other end of expansion link and the other end of sliding bar are hinged, the second lifting rope is embedded in the expansion link, and an end of the second lifting rope is packed in the lower end middle part of right slide block, and the other end of the second lifting rope rides on the pulley and be affixed with second group of counterweight.
Described lever used for physics teaching also comprises pencil box, blackboard eraser and Duo Gen charcoal pencil, and blackboard eraser and Duo Gen charcoal pencil are arranged in the pencil box, and pencil box is packed in an end of spool blackboard.
Described sliding bar is the Telescopic sliding bar.
Described cross bar is collapsible cross bar.
The utility model compared with prior art has following effect: 1. after spool blackboard of the present utility model launches, can be directly draw relation between the lever balance theory different parameters at the spool blackboard, make the student better carry out mutual contrast to the acting force of different directions, increase student's results of learning, simultaneously, alleviated teacher's teaching load.2. sliding bar of the present utility model, expansion link, pulley and protractor are convenient to demonstrate for the different parameters of lever balance theory, and in the presentation process, all lever balance theory figure can be plotted on the spool blackboard, be convenient to the academics and students to analysis and the research of lever balance theory.The cross bar that adopts of the utility model be collapsible cross bar, spool blackboard and pole is hinged and pole rotatably be arranged on base in the heart, all be convenient to carrying of lever used for physics teaching, brought convenience to the teacher, simultaneously, also be convenient to store lever used for physics teaching, saved the teaching aid storage area.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram under the utility model use state; Fig. 2 is the utility model spool blackboard deployed condition synoptic diagram; Fig. 3 is draw synoptic diagram under the complete rear explanation state of the utility model.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1-Fig. 3, present embodiment comprises base 1, pole 2, cross bar 3, left slider 4, right slide block 5, the first lifting rope 6, the second lifting rope 7, first group of counterweight 8 and second group of counterweight 9, pole 2 rotatably be arranged on base 1 in the heart, cross bar 3 is provided with scale, the upper articulation of the center of cross bar 3 and pole 2, left slider 4 and right slide block 5 respectively slip cap are contained in the both sides of cross bar 3, first group of counterweight 8 and second group of counterweight 9 are separately positioned on the below of left slider 4 and right slide block 5, and between left slider 4 and right slide block 5 and first group of counterweight 8 and the second group of counterweight 9 respectively by the first lifting rope 6 be connected lifting rope 7 and be connected, described lever used for physics teaching also comprises spool blackboard 10, sliding bar 11, expansion link 12, longitudinal sliding block 13, pulley 14, protractor 15, locking turns round 16 and a plurality of snap ring 17, spool blackboard 10 is arranged on the top of cross bar 3, and spool blackboard 10 is hinged with pole 2, have a plurality of draw-in groove 1-1 on the rear end face of base 1, a plurality of snap rings 17 are set up in parallel the lower end at spool blackboard 10, after spool blackboard 10 launches, be installed with a snap ring 17 in each draw-in groove 1-1 on the base 1, sliding bar 11 slides and is located on the longitudinal sliding block 13, longitudinal sliding block 13 slidably is arranged on the pole 2, and all turn round 16 lockings by locking between the end of longitudinal sliding block 13 and pole 2 and sliding bar 11, the other end of pulley 14 and sliding bar 11 is hinged by bearing pin successively from front to back, protractor 15 is packed on the rear end face of expansion link 12, one end of expansion link 12 detachably is arranged on the middle part, lower end of right slide block 5, the other end of the other end of expansion link 12 and sliding bar 11 is hinged, the second lifting rope 7 is embedded in the expansion link 12, and an end of the second lifting rope 7 is packed in the lower end middle part of right slide block 5, and the other end of the second lifting rope 7 rides on the pulley 14 and be affixed with second group of counterweight 9.
The lever used for physics teaching of present embodiment also comprises pencil box 18, blackboard eraser 19 and Duo Gen charcoal pencil 20, and blackboard eraser 19 and Duo Gen charcoal pencil 20 are arranged in the pencil box 18, and pencil box 18 is packed in an end of spool blackboard 10.So arrange, be convenient to the teacher in the process of giving lessons, draw lever balance theory figure while giving lessons, many charcoal pencils 20 can be the charcoal pencil of different colours, be convenient to the student different parameters of lever balance theory is analyzed and studied, blackboard eraser 19 is convenient to wipe the figure vestige of having drawn.Use simple, convenient.
The sliding bar 11 of present embodiment is the Telescopic sliding bar.So arrange, be convenient to demonstrate for the lever balance state under the different parameters.
The cross bar 3 of present embodiment is collapsible cross bar.So arrange, be easy to carry.
The course of work of the present utility model is:
During use, be installed in the draw-in groove 1-1 10 expansion of spool blackboard by snap ring 17, according to test parameters, adjust left slider 4 and the position of right slide block 5 and the weight of first group of counterweight 8 and second group of counterweight 9, when angle occurring between the second lifting rope 7 and the arm of force, throughput hornwork 15 is read its number of degrees, by the scale on the cross bar 3, reading the cosine value that its numerical value multiply by the angle number of degrees again in the second lifting rope 7 and the junction of right slide block 5 is its arm of force, and it is moment that acting force multiply by the arm of force.Rotational lock turns round 16, adjusts the horizontal level of pulley 14 and right slide block 5, just can obtain the acting force of different directions, and the horizontal level of pulley of every adjustment 14 and right slide block 5 is plotted on the spool blackboard 10 by charcoal pencil 20.
When analyzing lever balance theory, locking is turned round 16 and unclamped, and longitudinal sliding block 13 slides to the bottom of pole 2, and is lower from middle part, the lower end dismounting of right slide block 5 expansion link 12, can see clearly the lever balance theory figure that draws at spool blackboard 10.Be convenient to teacher's demonstration.
Claims (4)
1. lever used for physics teaching that is easy to carry and demonstrates, it comprises base (1), pole (2), cross bar (3), left slider (4), right slide block (5), the first lifting rope (6), the second lifting rope (7), first group of counterweight (8) and second group of counterweight (9), pole (2) rotatably be arranged on base (1) in the heart, cross bar (3) is provided with scale, the upper articulation of the center of cross bar (3) and pole (2), left slider (4) and right slide block (5) respectively slip cap are contained in the both sides of cross bar (3), first group of counterweight (8) and second group of counterweight (9) are separately positioned on the below of left slider (4) and right slide block (5), and between left slider (4) and right slide block (5) and first group of counterweight (8) and the second group of counterweight (9) respectively by the first lifting rope (6) be connected lifting rope (7) and be connected, it is characterized in that: described lever used for physics teaching also comprises spool blackboard (10), sliding bar (11), expansion link (12), longitudinal sliding block (13), pulley (14), protractor (15), (16) and a plurality of snap ring (17) are turned round in locking, spool blackboard (10) is arranged on the top of cross bar (3), and spool blackboard (10) is hinged with pole (2), have a plurality of draw-in grooves (1-1) on the rear end face of base (1), a plurality of snap rings (17) are set up in parallel the lower end in spool blackboard (10), after spool blackboard (10) launches, be installed with a snap ring (17) in each draw-in groove (1-1) on the base (1), sliding bar (11) slides and is located on the longitudinal sliding block (13), longitudinal sliding block (13) slidably is arranged on the pole (2), and all turn round (16) locking by locking between the end of longitudinal sliding block (13) and pole (2) and sliding bar (11), the other end of pulley (14) and sliding bar (11) is hinged by bearing pin successively from front to back, protractor (15) is packed on the rear end face of expansion link (12), one end of expansion link (12) detachably is arranged on the middle part, lower end of right slide block (5), the other end of the other end of expansion link (12) and sliding bar (11) is hinged, the second lifting rope (7) is embedded in the expansion link (12), and an end of the second lifting rope (7) is packed in the middle part, lower end of right slide block (5), and it is upper and affixed with second group of counterweight (9) that the other end of the second lifting rope (7) rides over pulley (14).
2. a kind of lever used for physics teaching that is easy to carry and demonstrates according to claim 1, it is characterized in that: described lever used for physics teaching also comprises pencil box (18), blackboard eraser (19) and many charcoal pencils (20), blackboard eraser (19) and many charcoal pencils (20) are arranged in the pencil box (18), and pencil box (18) is packed in an end of spool blackboard (10).
3. a kind of lever used for physics teaching that is easy to carry and demonstrates according to claim 2, it is characterized in that: described sliding bar (11) is the Telescopic sliding bar.
4. a kind of lever used for physics teaching that is easy to carry and demonstrates according to claim 1 and 2, it is characterized in that: described cross bar (3) is collapsible cross bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385718 CN202677674U (en) | 2012-08-06 | 2012-08-06 | Physical lever teaching aid convenient to carry and demonstrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385718 CN202677674U (en) | 2012-08-06 | 2012-08-06 | Physical lever teaching aid convenient to carry and demonstrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202677674U true CN202677674U (en) | 2013-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220385718 Expired - Fee Related CN202677674U (en) | 2012-08-06 | 2012-08-06 | Physical lever teaching aid convenient to carry and demonstrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202677674U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898199A (en) * | 2017-02-27 | 2017-06-27 | 杜美玲 | A kind of portable Function Teaching explanation apparatus |
| CN108877437A (en) * | 2018-07-24 | 2018-11-23 | 温州任和文化创意有限责任公司 | A kind of diffraction experiment by narrow opening instrument |
| CN109473000A (en) * | 2019-01-22 | 2019-03-15 | 商洛学院 | A kind of English teaching outpost formula testing apparatus |
-
2012
- 2012-08-06 CN CN 201220385718 patent/CN202677674U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898199A (en) * | 2017-02-27 | 2017-06-27 | 杜美玲 | A kind of portable Function Teaching explanation apparatus |
| CN108877437A (en) * | 2018-07-24 | 2018-11-23 | 温州任和文化创意有限责任公司 | A kind of diffraction experiment by narrow opening instrument |
| CN108877437B (en) * | 2018-07-24 | 2020-04-17 | 温州任和文化创意有限责任公司 | Single slit diffraction experimental instrument |
| CN109473000A (en) * | 2019-01-22 | 2019-03-15 | 商洛学院 | A kind of English teaching outpost formula testing apparatus |
| CN109473000B (en) * | 2019-01-22 | 2020-08-28 | 商洛学院 | Checkpoint type testing device for English teaching |
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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: 20130116 Termination date: 20130806 |