CN204516190U - A kind of slide rheostat demonstrator - Google Patents
A kind of slide rheostat demonstrator Download PDFInfo
- Publication number
- CN204516190U CN204516190U CN201520097590.4U CN201520097590U CN204516190U CN 204516190 U CN204516190 U CN 204516190U CN 201520097590 U CN201520097590 U CN 201520097590U CN 204516190 U CN204516190 U CN 204516190U
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- China
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- metal
- demonstrator
- bulb
- slide rheostat
- bar
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Abstract
The utility model relates to a kind of teaching aid, particularly a kind of slide rheostat demonstrator.Described slide rheostat demonstrator comprises the some bulbs of Zhi Zuo ﹑ Yuan Tong ﹑ metal Hua Gan ﹑ metal Hua Pian ﹑ Jue Yuan Ban ﹑ Jue Yuan Gan ﹑ etc., by the movement of metal slide plate, change the quantity of bulb in place in circuit, thus reach the resistance value changed in circuit, change the size of electric current in circuit, and directly show the light levels of bulb.Demonstrate short and sweet, vivid.Described slide rheostat demonstrator is small and exquisite easy, easy to carry, can save instructional blocks of time, improve learning efficiency.
Description
Technical field
The utility model relates to a kind of middle school teaching aid, particularly a kind of slide rheostat demonstrator.
Background technology
The use of slide rheostat is the selective learning content in middle school physical curriculum.Traditional teaching method allows the structure of student's combined circuit Fu He ﹑ structural representation and simple knowledge slide rheostat in kind, resistance is changed by the length changing resistive conductor in place in circuit, thus change electric current, it is vivid not that its shortcoming is the explanation of rheostatic principle of work, and when student uses rheostat, which part circuit electric current flow through and understand very difficult.
Summary of the invention
The utility model provides a kind of slide rheostat demonstrator for above-mentioned defect.
The technical solution of the utility model is such:
A kind of slide rheostat demonstrator, comprise Zhi Zuo ﹑ metal slide bar, metal slide plate, insulating bar and some bulbs, described metal slide bar, insulating bar is set in parallel on this bearing, described metal slide plate is sheathed on this metal slide bar movably, the end of this metal slide plate contacts with this insulating bar, described some bulbs are connected successively, a metal wire is connected with between adjacent two bulbs, the other end of this metal wire is wound on described insulating bar, the two ends of described metal slide bar are respectively the first terminals and the second terminals, bulb side after described series connection is respectively the 3rd terminals and the 4th terminals.
Also comprise a cylinder, this cylinder is fixed on described bearing, and described insulating bar is fixed on this cylinder.
The periphery that described metal slide plate is positioned at one end of metal slide bar is coated with insulation course, and the other end contacts with the surface of described insulating bar.
Geometrical clamp is equipped with in described cylinder both sides, and an insulcrete is fixed on this geometrical clamp by screw, and the lamp holder of described bulb is through the aperture on this insulcrete.
Described insulating bar is fixed on cylinder by glass cement.
Described bulb is 6 to 9.
The beneficial effects of the utility model are: a kind of slide rheostat demonstrator, for physics teaching in secondary school, and the principle of work of demonstration slide rheostat that can be vivid.By changing the bulb quantity in place in circuit, reaching the resistance value changed in circuit, by observing the brightness of bulb, can see intuitively, along with the change of bulb quantity, the change of bulb brightness.Demonstrate short and sweet, vivid.Demonstrator is small and exquisite easy, easy to carry, can save instructional blocks of time, improve learning efficiency.
Accompanying drawing explanation
Accompanying drawing 1 is slide rheostat demonstrator front elevation.
Accompanying drawing 2 is slide rheostat E-E section left view.
Embodiment
Embodiment of the present utility model is illustrated below in conjunction with Fig. 1 and Fig. 2:
As depicted in figs. 1 and 2, a kind of slide rheostat demonstrator, comprise bearing 1 ﹑ metal slide bar 3, metal slide plate 4, insulating bar 6 and some bulbs, described metal slide bar 3, insulating bar 6 is set in parallel on this bearing 1, described metal slide plate 4 is sheathed on this metal slide bar 3 movably, the end of this metal slide plate 4 contacts with this insulating bar 6, described some bulbs are connected successively, a metal wire 9 is connected with between adjacent two bulbs, the other end of this metal wire 9 is wound on described insulating bar 6, the two ends of described metal slide bar 3 are respectively the first terminals A and the second terminals B, bulb side after described series connection is respectively the 3rd terminals C and the 4th terminals D.
Also comprise a cylinder 2, this cylinder 2 is fixed on described bearing 1, and described insulating bar 6 is fixed on this cylinder 2.
The periphery that described metal slide plate 4 is positioned at one end of metal slide bar 3 is coated with insulation course, and the other end contacts with the surface of described insulating bar 6.
Geometrical clamp 7 is equipped with in described cylinder both sides, and an insulcrete 5 is fixed on this geometrical clamp 7 by screw 8, and the lamp holder of described bulb is through the aperture on this insulcrete 5.
Described insulating bar 6 is fixed on cylinder 2 by glass cement.
Described bulb is 6 to 9.
During demonstration, metal slide plate 4 slides into high order end, A, D two terminals connect with the mains, bulb L2 ﹑ L3 ﹑ L4 ﹑ L5 ﹑ L6 is bright, illustrates that these 5 bulbs connect in circuit, when metal slide plate 4 moves right, bright bulb number reduces, the bulb number do not worked increases, and bulb becomes brighter, when moving metal 4 slide plate is described simultaneously, bulb number in place in circuit changes, change resistance, thus change the electric current in circuit, draw the principle of slide rheostat.When metal slide plate 4 slides into centre, A, D two terminals connect with the mains, bulb L4 ﹑ L5 ﹑ L6 is bright on 3, the right; B, D two terminals when connecting with the mains, bulb L4 ﹑ L5 ﹑ L6 is bright on 3, the right, illustrates that these two kinds of connection effects are identical, in the bulb place in circuit on the right of metal slide plate 4.When metal slide plate 4 slides into centre, A, C two terminals connect with the mains, bulb L1 ﹑ L2 ﹑ L3 is bright on 3, the left side; B, C two terminals connect with the mains, L1 ﹑ L2 ﹑ L3 is bright on 3, the left side, illustrates that these two kinds of connection effects are identical, in the bulb place in circuit on metal slide plate 4 left side.
The utility model can the principle of work of demonstration slide rheostat of image.By changing the bulb quantity in place in circuit, reaching the resistance value changed in circuit, by observing the brightness of bulb, can see intuitively, along with the change of bulb quantity, the change of bulb brightness.Demonstrate short and sweet, vivid.Demonstrator is small and exquisite easy, easy to carry, can save instructional blocks of time, improve learning efficiency.
Be more than preferred embodiment of the present utility model, based on the deduction that above preferred embodiment does, also belong to covering scope of the present utility model.
Claims (6)
1. a slide rheostat demonstrator, it comprises bearing, it is characterized in that: it also comprises metal slide bar, metal slide plate, insulating bar and some bulbs, described metal slide bar, insulating bar is set in parallel on this bearing, described metal slide plate is sheathed on this metal slide bar movably, the end of this metal slide plate contacts with this insulating bar, described some bulbs are connected successively, a metal wire is connected with between adjacent two bulbs, the other end of this metal wire is wound on described insulating bar, the two ends of described metal slide bar are respectively the first terminals and the second terminals, bulb side after described series connection is respectively the 3rd terminals and the 4th terminals.
2. slide rheostat demonstrator according to claim 1, is characterized in that, it also comprises a cylinder, and this cylinder is fixed on described bearing, and described insulating bar is fixed on this cylinder.
3. slide rheostat demonstrator according to claim 1 and 2, is characterized in that, the periphery that described metal slide plate is positioned at one end of metal slide bar is coated with insulation course, and the other end contacts with the surface of described insulating bar.
4. slide rheostat demonstrator according to claim 2, is characterized in that, geometrical clamp is equipped with in described cylinder both sides, and an insulcrete is fixed on this geometrical clamp by screw, and the lamp holder of described bulb is through the aperture on this insulcrete.
5. slide rheostat demonstrator according to claim 2, is characterized in that, described insulating bar is fixed on cylinder by glass cement.
6. slide rheostat demonstrator according to claim 1, is characterized in that: described bulb is 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520097590.4U CN204516190U (en) | 2015-02-11 | 2015-02-11 | A kind of slide rheostat demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520097590.4U CN204516190U (en) | 2015-02-11 | 2015-02-11 | A kind of slide rheostat demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204516190U true CN204516190U (en) | 2015-07-29 |
Family
ID=53714139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520097590.4U Expired - Fee Related CN204516190U (en) | 2015-02-11 | 2015-02-11 | A kind of slide rheostat demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204516190U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705682A (en) * | 2017-10-26 | 2018-02-16 | 吴义恒 | A kind of physical resistance experiment teaching aid |
-
2015
- 2015-02-11 CN CN201520097590.4U patent/CN204516190U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705682A (en) * | 2017-10-26 | 2018-02-16 | 吴义恒 | A kind of physical resistance experiment teaching aid |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20170211 |