CN203276669U - Demonstrator for thermal expansion and conductor and insulator - Google Patents
Demonstrator for thermal expansion and conductor and insulator Download PDFInfo
- Publication number
- CN203276669U CN203276669U CN 201320310450 CN201320310450U CN203276669U CN 203276669 U CN203276669 U CN 203276669U CN 201320310450 CN201320310450 CN 201320310450 CN 201320310450 U CN201320310450 U CN 201320310450U CN 203276669 U CN203276669 U CN 203276669U
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- insulator
- conductor
- heat
- cold
- contract
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Abstract
The utility model provides a demonstrator for thermal expansion and conductor and insulator, belongs to the technical field of teaching aids, and especially relates to a middle school physics teaching aid. The demonstrator includes: an insulation bottom seat (6); a thermal expansion device fixed on the right side of the upper part of the insulation bottom seat (6), a battery clamping device fixed on the rear end of the left side of the insulation bottom seat (6), and an indication lamp device fixed on the front end of the left side of the insulation bottom seat (6), which are connected by conducting wires. The demonstrator for thermal expansion and conductor and insulator is capable of demonstrating a thermal expansion experiment and a conductor and insulator detection experiment at the same time. The demonstrator for thermal expansion and conductor and insulator has advantages of being multifunctional, material saving, simple, clear, and easy to master, being capable of motivate learning interest for students as well as helping students to master physics knowledge, being simple in structure, being safe and reliable, and being obvious in experiment effects.
Description
Technical field
Expand with heat and contract with cold and conductor, insulator demonstration device, belong to the teaching aid technical field.Be specifically related to a kind of physical teaching aid for middle school.
Background technology
At present, expanding with heat and contract with cold in Middle School Physics can only be from the theory to the theory with the teaching of conductor, insulator, cavity, not directly perceived, and the student is difficult for understanding and memory.More can not motivate students' interest in learning, also be not easy to grasp rapidly physical knowledge, not yet have at present and can intuitively reflect the demonstration instrument that this is theoretical.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of directly perceived, be convenient to the student and understand and remember, motivate students' interest in learning, be convenient to grasp rapidly expanding with heat and contract with cold and conductor, insulator demonstration device of physical knowledge.
The technical scheme that its technical matters that solves the utility model adopts is: this expands with heat and contract with cold and conductor, insulator demonstration device, it is characterized in that: comprise insulator foot, be connected and be fixed on the device that expands with heat and contract with cold, the battery folder device of rear end, left side and the indicating lamp device of left side front end on right side above insulator foot by wire.
The described device that expands with heat and contract with cold comprises two support columns, and the hole is laterally opened in the support column upper end, and two metal bar levels are arranged in the hole relatively, are provided with screw thread in the vertical port of support column, by the adjusting bolt of upper end, two metal bars are fixed.
The battery folder device of rear end, described left side comprises two battery grip boxs that are in series, and two batteries are arranged in the battery grip box.
The indicating lamp device of described left side front end is to be fixed on the miniature bulb on bulb holder, positive terminal and the negative terminal at two ends.
Principle of work: with spirit lamp heating of metal rod, make the metal bar expanded by heating be in contact with one another the formation closed circuit, make miniature bulb luminous.Remove spirit lamp, metal bar shrinks, and metal bar separates, and circuit disconnects, and miniature bulb does not work, and illustrates that object has the character of expanding with heat and contract with cold.In addition, in the situation that do not heat, can do the check experiment of conductor and insulator, the distance of two metal bars is elongated, put an object in the centre, object must be connected with two metal bars, if miniature bulb is luminous, illustrate that this object is conductor, not luminous, be insulator.
Compared with prior art, of the present utility model expand with heat and contract with cold and the beneficial effect that has of conductor, insulator demonstration device is:
This demonstration device can be done two experimental demonstrations simultaneously:
1, principle of expanding with heat and contracting with cold;
2, the check of conductor, insulator.
Not only the material saving, but also simple, understand, be easy to grasp, not only motivate students' interest in learning, can make again the student grasp rapidly physical knowledge, filled up a blank in the teaching aid.
This teaching aid can be demonstrated the check experiment of the principle of expanding with heat and contract with cold and conductor, insulator simultaneously.Simple in structure, a tractor serves several purposes; The advantage such as safe and reliable, easy operating, experiment effect are obvious.
Description of drawings
Fig. 1 originally expands with heat and contract with cold and the structural representation of conductor, insulator demonstration device.
Fig. 2 is the circuit theory schematic diagram.
Wherein: 1, battery grip box 2, battery 3, adjusting bolt 4, metal bar 5, support column 6, insulator foot 7, negative terminal 8, miniature bulb 9, positive terminal 10, bulb holder HL, miniature bulb 8 B, battery 2.
Embodiment
Fig. 1 ~ 2nd, of the present utility model expanding with heat and contract with cold and conductor, insulator demonstration device most preferred embodiment is described further below in conjunction with 1 ~ 2 pair of the utility model of accompanying drawing.
With reference to accompanying drawing 1-2: this expands with heat and contract with cold and conductor, insulator demonstration device, is comprised of battery grip box 1, battery 2, adjusting bolt 3, metal bar 4, support column 5, insulator foot 6, negative terminal 7, miniature bulb H8, positive terminal 9 and bulb holder 10.
The device that expands with heat and contract with cold comprises two support columns 5, and the hole is laterally opened in support column 5 upper ends, and two metal bar 4 levels are arranged in the hole relatively, are provided with screw thread in the vertical port of support column 5, by the adjusting bolt 3 of upper end, two metal bars 4 are fixed.
The battery folder device of rear end, left side comprises that two battery grip boxs, 1, two batteries 2 that is in series is arranged on respectively in battery grip box 1.
The indicating lamp device of left side front end is to be fixed on the miniature bulb 8 on bulb holder 10, positive terminal 9 and the negative terminal 7 at two ends.
As shown in Figure 2: circuit connecting relation is: the series circuit that HL miniature bulb 8, B battery 2 and two metal bars 4 is connected by wire.When the contact circuit conducting of being heated of two metal bars 4, HL miniature bulb 8 is luminous, and when not heating, two metal bar 4 shrinkages the gap circuit occurs and disconnect, and HL miniature bulb 8 does not work.
Principle of work and the course of work are as follows:
Experimental demonstration expands with heat and contract with cold: this is expanded with heat and contract with cold installs with conductor, insulator demonstration device, two metal bars 4 are installed relatively fixed, between leave the gap, both ends with spirit lamp heating of metal rod 4, make metal bar 4 expanded by heating, two metal bars 4 are in contact with one another, and form closed circuit, make miniature bulb 8 luminous.Remove spirit lamp, metal bar shrinks, and two metal bars 4 separate, and circuit disconnects, and miniature bulb 8 does not work, and illustrates that object has the character of expanding with heat and contract with cold.
Conductor, insulator experimental demonstration: in the situation that do not heat, can do the check experiment of conductor and insulator, by adjusting bolt 3, the distance of two metal bars 4 is elongated, put an object in the centre, object must be connected with two metal bars 4, if miniature bulb 8 is luminous, illustrate that this object is conductor; Not luminous, be insulator.
This teaching aid can be done two lecture experiments: 1, principle of expanding with heat and contracting with cold.2, the check of conductor, insulator.Both the material saving, add bright problem.Simply, understand, be easy to grasp, not only motivate students' interest in learning, can grasp rapidly physical knowledge again, filled up the blank of teaching aid.
The above, it is only preferred embodiment of the present utility model, be not to be the utility model to be done the restriction of other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment does, still belongs to the protection domain of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (4)
1. one kind expands with heat and contract with cold and conductor, insulator demonstration device, it is characterized in that: comprise insulator foot (6), be connected and be fixed on the device that expands with heat and contract with cold, the battery folder device of rear end, left side and the indicating lamp device of left side front end on right side above insulator foot (6) by wire.
2. according to claim 1 expanding with heat and contract with cold and conductor, insulator demonstration device, it is characterized in that: the described device that expands with heat and contract with cold comprises two support columns (5), the hole is laterally opened in support column (5) upper end, two metal bars (4) level is arranged in the hole relatively, be provided with screw thread in the vertical port of support column (5), by the adjusting bolt (3) of upper end, that two metal bars (4) are fixing.
3. according to claim 1 expanding with heat and contract with cold and conductor, insulator demonstration device, it is characterized in that: the battery folder device of rear end, described left side comprises two the battery grip boxs (1) that are in series, and two batteries (2) are arranged in battery grip box (1).
4. according to claim 1 expanding with heat and contract with cold and conductor, insulator demonstration device, it is characterized in that: the indicating lamp device of described left side front end is to be fixed on the miniature bulb (8) on bulb holder (10), positive terminal (9) and the negative terminal (7) at two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320310450 CN203276669U (en) | 2013-06-01 | 2013-06-01 | Demonstrator for thermal expansion and conductor and insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320310450 CN203276669U (en) | 2013-06-01 | 2013-06-01 | Demonstrator for thermal expansion and conductor and insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203276669U true CN203276669U (en) | 2013-11-06 |
Family
ID=49507034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320310450 Expired - Fee Related CN203276669U (en) | 2013-06-01 | 2013-06-01 | Demonstrator for thermal expansion and conductor and insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203276669U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109308830A (en) * | 2017-07-26 | 2019-02-05 | 昆山市苞蕾众创投资管理有限公司 | Thermal expansion metal observes device |
-
2013
- 2013-06-01 CN CN 201320310450 patent/CN203276669U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109308830A (en) * | 2017-07-26 | 2019-02-05 | 昆山市苞蕾众创投资管理有限公司 | Thermal expansion metal observes device |
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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: 20131106 Termination date: 20140601 |