CN203552542U - Demonstration teaching aid for sound and energy - Google Patents
Demonstration teaching aid for sound and energy Download PDFInfo
- Publication number
- CN203552542U CN203552542U CN201320622657.2U CN201320622657U CN203552542U CN 203552542 U CN203552542 U CN 203552542U CN 201320622657 U CN201320622657 U CN 201320622657U CN 203552542 U CN203552542 U CN 203552542U
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- chip
- teaching aid
- sound
- demonstration teaching
- tda2003
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Abstract
A demonstration teaching aid for sound and energy relates to an improvement of a structure of the demonstration teaching aid for the sound and the energy. The utility model provides a demonstration teaching aid for sound and energy, and the teaching aid is advantaged by obvious demonstration effect and convenient adjustment of audio frequency and volume. The demonstration teaching aid comprises a base and is characterized in that the base is provided with a supporting frame and two supporting rods, a resonance box is arranged on the two supporting rods, one end of the resonance box is provided with a loudspeaker, the other end of the resonance box is provided with a baffle, and through holes are arranged in the middle portion of the baffle. The supporting frame is provided with a rotating shaft, the rotating shaft corresponding to the through holes is provided with blades, an electronic circuit board and a power supply portion are arranged in the base, a CD4046 chip and a TDA2003 chip are arranged on the electronic circuit board, an output terminal of the CD4046 chip is connected with a positive input terminal of the TDA2003 chip via a rheostat, and an output terminal of the TDA2003 chip is connected with an input terminal of the loudspeaker.
Description
Technical field
the utility model relates to the improvement of sound and energy demonstration teaching aid structure.
Background technology
at present, junior physics teaching material is the content of courses with energy about sound, there is no good demonstration teaching aid.In teaching material, provide with pop can bucket and add that rubber pattern carries out lecture experiment, when beaing rubber pattern with hand, rubber pattern sounding, the candle flame on side can swing, and explanation sound has energy.But rubber pattern sounding is very little, student is difficult to hear.Also have a kind of loudspeaker sounding of using, the teaching aid that candle flame is extinguished, illustrates that sounding has energy.But extinguishing candles flame is moment, effect is undesirable.And, can not demonstrate the relation of sounding size and energy size.
Summary of the invention
the utility model is exactly for the problems referred to above, provides a kind of and demonstrate successful, is convenient to regulate the sound and energy demonstration teaching aid of audio frequency and volume.
for achieving the above object, the utility model adopts following technical scheme, the utility model comprises base, on its structural feature base, be provided with support frame and two support bars, on two support bars, be provided with resonant tank, resonant tank one end is provided with loudspeaker, and the resonant tank other end is provided with baffle plate, and baffle plate middle part has through hole; On described support frame, be provided with rotating shaft, in rotating shaft, corresponding to described through hole, be provided with blade; In described base, be provided with electronic circuit board and power pack, on electronic circuit board, be provided with CD4046 chip and TDA2003 chip, the output terminal of CD4046 chip is connected with TDA2003 chip positive input terminal by rheostat, and the output terminal of TDA2003 chip is connected with the input end of described loudspeaker; On described base, be also provided with described CD4046 chip output frequency adjusting knob and described rheostatic adjusting knob.
as a kind of preferred version, power pack described in the utility model comprises transformation rectification circuit and DC/DC conversion portion, and the output port of transformation rectification circuit is connected with the input port of DC/DC conversion portion, and DC/DC conversion portion adopts 7812 chips.
as another kind of preferred version, the diameter of through hole described in the utility model is 5mm.
in addition, it is 14cm that resonant tank described in the utility model adopts diameter, and length is the organic glass bucket of 26cm.
the utility model beneficial effect.
1, demonstration successful.
the utility model is used in conjunction with by CD4046 chip, TDA2003 chip, resonant tank, blade, loudspeaker, send give great volume, concentration of energy, blade rotary is obvious.
2, be convenient to regulate.
on the utility model base, be also provided with described CD4046 chip output frequency adjusting knob and described rheostatic adjusting knob; Be convenient to the adjusting of audio frequency and volume.
3, simple in structure.
the utility model mainly comprises base, resonant tank, loudspeaker, blade, electronic circuit board, adjusting knob; Member is few, simple in structure.
Accompanying drawing explanation
clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, below in conjunction with the drawings and the specific embodiments, the utility model is further elaborated.Should be appreciated that embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
fig. 1 is the utility model structural representation.
fig. 2 is the utility model schematic block circuit diagram.
in figure, 1 is that support frame, 2 is that blade, 3 is that resonant tank, 4 is that rheostatic adjusting knob, 5 is that support bar, 6 is that frequency adjustment knob, 7 is loudspeaker.
Embodiment
as shown in the figure, the utility model comprises base, is provided with on support frame 1 and 5, two support bars 5 of two support bars and is provided with resonant tank 3 on base, and resonant tank 3 one end are provided with loudspeaker 7, and resonant tank 3 other ends are provided with baffle plate, and baffle plate middle part has through hole; On described support frame 1, be provided with rotating shaft, in rotating shaft, corresponding to described through hole, be provided with blade 2; In described base, be provided with electronic circuit board and power pack, on electronic circuit board, be provided with CD4046 chip and TDA2003 chip, the output terminal of CD4046 chip is connected with TDA2003 chip positive input terminal by rheostat, and the output terminal of TDA2003 chip is connected with the input end of described loudspeaker 7; On described base, be also provided with described CD4046 chip output frequency adjusting knob 6 and described rheostatic adjusting knob 4.
described power pack comprises transformation rectification circuit and DC/DC conversion portion, and the output port of transformation rectification circuit is connected with the input port of DC/DC conversion portion, and DC/DC conversion portion adopts 7812 chips.
the diameter of described through hole is 5mm.
it is 14cm that described resonant tank 3 adopts diameter, and length is the organic glass bucket of 26cm.
be understandable that, above about specific descriptions of the present utility model, only for being described, the utility model is not limited to the described technical scheme of the utility model embodiment, those of ordinary skill in the art is to be understood that, still can modify or be equal to replacement the utility model, to reach identical technique effect; As long as meet, use needs, all within protection domain of the present utility model.
Claims (4)
- A sound with can demonstration teaching aid, comprise base, it is characterized in that being provided with on base support frame (1) and two support bars (5), on two support bars (5), be provided with resonant tank (3), resonant tank (3) one end is provided with loudspeaker (7), resonant tank (3) other end is provided with baffle plate, and baffle plate middle part has through hole; Described support frame is provided with rotating shaft on (1), in rotating shaft, corresponding to described through hole, is provided with blade (2); In described base, be provided with electronic circuit board and power pack, on electronic circuit board, be provided with CD4046 chip and TDA2003 chip, the output terminal of CD4046 chip is connected with TDA2003 chip positive input terminal by rheostat, and the output terminal of TDA2003 chip is connected with the input end of described loudspeaker (7); On described base, be also provided with described CD4046 chip output frequency adjusting knob (6) and described rheostatic adjusting knob (4).
- According to claim 1 a kind of sound with can demonstration teaching aid, it is characterized in that described power pack comprises transformation rectification circuit and DC/DC conversion portion, the output port of transformation rectification circuit is connected with the input port of DC/DC conversion portion, and DC/DC conversion portion adopts 7812 chips.
- According to claim 1 a kind of sound with can demonstration teaching aid, the diameter that it is characterized in that described through hole is 5mm.
- According to claim 1 a kind of sound with can demonstration teaching aid, it is characterized in that it is 14cm that described resonant tank (3) adopts diameter, length is the organic glass bucket of 26cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622657.2U CN203552542U (en) | 2013-10-10 | 2013-10-10 | Demonstration teaching aid for sound and energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622657.2U CN203552542U (en) | 2013-10-10 | 2013-10-10 | Demonstration teaching aid for sound and energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203552542U true CN203552542U (en) | 2014-04-16 |
Family
ID=50470625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320622657.2U Expired - Fee Related CN203552542U (en) | 2013-10-10 | 2013-10-10 | Demonstration teaching aid for sound and energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203552542U (en) |
-
2013
- 2013-10-10 CN CN201320622657.2U patent/CN203552542U/en not_active Expired - Fee Related
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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: 20140416 Termination date: 20141010 |
|
| EXPY | Termination of patent right or utility model |