CN211237443U - Experiment demonstration device for vacuum sound transmission failure - Google Patents
Experiment demonstration device for vacuum sound transmission failure Download PDFInfo
- Publication number
- CN211237443U CN211237443U CN201922082288.2U CN201922082288U CN211237443U CN 211237443 U CN211237443 U CN 211237443U CN 201922082288 U CN201922082288 U CN 201922082288U CN 211237443 U CN211237443 U CN 211237443U
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- China
- Prior art keywords
- glass cover
- base
- magnet
- alarm clock
- vacuum
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- Expired - Fee Related
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Abstract
The utility model belongs to a physical experiment instrument specifically is a vacuum can not pass experimental demonstration device of sound. Including glass cover, base, alarm clock, trachea, aspiration pump, the alarm clock is placed in the glass cover, glass cover and base sealing connection, the aspiration pump is through the trachea and the inside intercommunication of glass cover that pass the base, the base is lower extreme open-ended cask body, is provided with on its up end and connects sealed lid, it is up to connect sealed lid opening, is equipped with the screw thread on its inner wall, be equipped with the external screw thread on the port under the glass cover, glass cover lower extreme threaded connection is in connecting sealed lid, the alarm clock lower part is equipped with magnet an, magnet b has been placed in the base, magnet an is relative with magnet b homopolar. The utility model discloses simple structure, convenient preparation, easily experimental operation, convenient regulation, the experimental effect is obvious, convenient to popularize and use.
Description
Technical Field
The utility model relates to a physical experiment instrument, in particular to experiment presentation device that vacuum can not pass sound.
Background
The experiment means is used for demonstrating that the vacuum can not conduct sound and the air can conduct sound, which is an elementary basic experiment in the physics teaching of middle school, and the success of the experiment is helpful for students to correctly know the experiment design, the experiment means, the application of the experiment method, the relation of the related knowledge and other aspects.
The conventional vacuum sound-conduction-free experiment mainly comprises a vacuum cover and a vacuum air pump. The sounding body adopts a battery-driven electric bell (or an alarm clock). The specific operation method is that the power supply of the electric bell is turned on, the electric bell sounds, the glass cover is covered, the air extractor is started, and the sound gradually becomes smaller but is audible. Or the alarm clock is wound and sounds to be put into the vacuum cover. The disadvantage is that the sounding body is placed on the base, and the sound is transmitted out through the solid body.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure, convenient preparation, easily experiment operation, the experiment presentation device of the vacuum of convenient regulation can not pass the sound.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
the utility model provides a vacuum can not pass experimental demonstration device of sound, includes glass cover 1, base 2, alarm clock 3, trachea 4, aspiration pump 5, alarm clock 3 places in glass cover 1, glass cover 1 and base 2 sealing connection, aspiration pump 5 is through passing trachea 4 and the inside intercommunication of glass cover 1 of base 2, its characterized in that: the alarm clock is characterized in that the base 2 is a barrel with an opening at the lower end, a connecting 7-connecting sealing cover 8 is arranged on the upper end face of the base, the opening of the connecting sealing cover 8 is upward, threads are arranged on the inner wall of the connecting sealing cover, external threads are arranged on the lower end opening of the glass cover 1, the lower end of the glass cover 1 is connected in the connecting sealing cover 8 in a threaded manner, a magnet a6 is arranged at the lower part of the alarm clock 3, a magnet b7 is placed in the base 2, and the like poles of the magnet a6 and.
The outer wall of the lower end of the base 2 is provided with external threads, and the adjusting cylinder 9 with the internal threads is in threaded connection with the lower end of the base 2.
The alarm clock is characterized in that a mounting plate is arranged on the supporting leg at the bottom of the alarm clock 3, a [ -shaped placing groove is formed in the lower surface of the mounting plate, and the magnet a6 is placed in the placing groove.
And a sealing ring is arranged at the lower side of the opening of the glass cover 1 in the bottom of the connecting sealing cover 8.
The magnets a6 and b7 are cylindrical magnets, and the diameter of the magnet b7 is larger than that of the glass cover 1.
The beneficial effects of the utility model reside in that: the arranged connecting sealing cover is convenient for the glass cover to be connected on the base, so that the experiment operation is convenient; it is through threaded connection's regulation barrel on the base, conveniently adjusts the height of base, just also adjusts the distance between magnet a and the magnet b to adjust the size of magnetic force, make the alarm clock keep at suitable height. To sum up, the utility model discloses convenient preparation, convenient the regulation, easily experimental operation, the experimental effect is obvious, is favorable to the physics experiment teaching, convenient to popularize and use.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a front view of the present invention.
Shown in the figure: a glass cover 1; a base 2; an alarm clock 3; an air pipe 4; an air pump 5; a magnet a 6; a magnet b 7; connecting the sealing cover 8; the cylinder 9 is adjusted.
Detailed Description
The structure and the beneficial effects of the present invention will be further explained with reference to the accompanying drawings.
Example (b):
the utility model provides an experiment presentation device that vacuum can not pass through sound, as fig. 1 to 2, including glass cover 1, base 2, alarm clock 3, trachea 4, aspiration pump 5, alarm clock 3 is placed in glass cover 1, glass cover 1 and base 2 sealing connection, aspiration pump 5 is through the trachea 4 and the inside intercommunication of glass cover 1 that pass base 2, base 2 is the lower extreme open-ended cask body, is provided with on its up end and connects sealed lid 8, it is up to connect 8 openings of sealed lid, is equipped with the screw thread on its inner wall, be equipped with the external screw thread on the port under glass cover 1, 1 lower extreme threaded connection of glass cover is in connecting sealed lid 8, 3 lower parts of alarm clock are equipped with magnet a6, magnet b7 has been placed in the base 2, magnet a6 is relative with magnet b7 homopolar.
The outer wall of the lower end of the base 2 is provided with external threads, and the adjusting cylinder 9 with the internal threads is in threaded connection with the lower end of the base 2.
The alarm clock is characterized in that a mounting plate is arranged on the supporting leg at the bottom of the alarm clock 3, a [ -shaped placing groove is formed in the lower surface of the mounting plate, and the magnet a6 is placed in the placing groove.
And a sealing ring is arranged at the lower side of the opening of the glass cover 1 in the bottom of the connecting sealing cover 8.
The magnets a6 and b7 are cylindrical magnets, and the diameter of the magnet b7 is larger than that of the glass cover 1. Thus, the magnetic force of the magnet b7 is uniformly distributed at the glass cover, and the magnet a6 will not be shaken in the glass cover.
The utility model discloses embodiment's theory of operation does: during the experiment, firstly, the alarm clock is adjusted, the alarm clock with the magnet a arranged at the bottom is placed in the middle of the connecting sealing cover on the base, the glass cover is screwed on the connecting sealing cover, the glass cover and the connecting sealing cover are sealed through the sealing ring, the magnet b is placed on the table in the base, the magnet a and the magnet b are opposite in homopolar, the adjusting cylinder is rotated to move up and down on the base, thus, the distance between the magnet b placed on the base and the magnet a at the bottom of the alarm clock is changed, the magnetic force between the two magnets opposite in homopolar is slowly adjusted until the repulsive magnetic force between the two magnets suspends the alarm clock, when the alarm clock rings, the air in the glass cover is pumped through the air pipe by the air pump, the air can be gradually pumped out, the alarm clock can be gradually reduced, when the air in the glass cover is completely pumped out, the audience can not hear the sound of the glass cover, thereby demonstrating the experiment that vacuum cannot transmit sound.
Above only do the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, all belong to the technical scheme of the present invention all belong to the protection scope of the present invention. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (5)
1. The utility model provides a vacuum can not pass experimental demonstration device of sound, includes glass cover (1), base (2), alarm clock (3), trachea (4), aspiration pump (5), alarm clock (3) are placed in glass cover (1), glass cover (1) and base (2) sealing connection, aspiration pump (5) are through trachea (4) and the inside intercommunication of glass cover (1) that pass base (2), its characterized in that: base (2) are the cask body of lower extreme open-ended, are provided with on its up end and connect sealed lid (8), it is ascending to connect sealed lid (8) opening, is equipped with the screw thread on its inner wall, be equipped with the external screw thread on glass cover (1) lower port, glass cover (1) lower extreme threaded connection is in connecting sealed lid (8), alarm clock (3) lower part is equipped with magnet a (6), magnet b (7) have been placed in base (2), magnet a (6) are relative with magnet b (7) homopolar.
2. A vacuum unvoiced experimental demonstration apparatus in accordance with claim 1, wherein: the outer wall of the lower end of the base (2) is provided with external threads, and the adjusting cylinder (9) with the internal threads is in threaded connection with the lower end of the base (2).
3. A vacuum unvoiced experimental demonstration apparatus in accordance with claim 1, wherein: the alarm clock is characterized in that a mounting plate is arranged on the supporting leg at the bottom of the alarm clock (3), a [ -shaped placing groove is formed in the lower surface of the mounting plate, and the magnet a (6) is placed in the placing groove.
4. A vacuum unvoiced experimental demonstration apparatus in accordance with claim 1, wherein: and a sealing ring is arranged at the lower side of the opening of the glass cover (1) in the bottom of the connecting sealing cover (8).
5. A vacuum unvoiced experimental demonstration apparatus in accordance with claim 1, wherein: the magnets a (6) and the magnets b (7) are cylindrical magnets, and the diameter of the magnets b (7) is larger than that of the glass cover (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922082288.2U CN211237443U (en) | 2019-11-27 | 2019-11-27 | Experiment demonstration device for vacuum sound transmission failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922082288.2U CN211237443U (en) | 2019-11-27 | 2019-11-27 | Experiment demonstration device for vacuum sound transmission failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211237443U true CN211237443U (en) | 2020-08-11 |
Family
ID=71923037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922082288.2U Expired - Fee Related CN211237443U (en) | 2019-11-27 | 2019-11-27 | Experiment demonstration device for vacuum sound transmission failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211237443U (en) |
-
2019
- 2019-11-27 CN CN201922082288.2U patent/CN211237443U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20200811 Termination date: 20211127 |