CN203982626U - Simple and easy skinless drum - Google Patents
Simple and easy skinless drum Download PDFInfo
- Publication number
- CN203982626U CN203982626U CN201420406531.6U CN201420406531U CN203982626U CN 203982626 U CN203982626 U CN 203982626U CN 201420406531 U CN201420406531 U CN 201420406531U CN 203982626 U CN203982626 U CN 203982626U
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- infrared
- control circuit
- loudspeaker
- easy
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Abstract
The utility model discloses a kind of simple and easy skinless drum, comprise base, be arranged on the hollow cylinder on base, described hollow cylinder upper end open inner side is provided with sensor, in described base, is provided with control circuit, and described sensor connects control circuit, on base, be also provided with the loudspeaker being connected with control circuit, described control circuit is: a switching tube, and this switching tube comprises control end, is coupled to sensor, first end, be coupled to external power source, the second end, is coupled to loudspeaker.Simple and easy skinless drum of the present utility model, just can effectively reach the effect of control circuit, its simple in structure and low in cost by a switching tube.
Description
Technical field
The utility model relates to a kind of teaching aid technical field, relates in particular a kind of simple and easy skinless drum.
Background technology
Drum is a kind of percussion instrument, at the one side of bulging body firm and that be generally drum-shaped or the film of two-sided illiteracy lastblock tension, drum can knock and speak with hand or drum pestle, drum is at African traditional music and be a kind of important musical instrument in contemporary music, by band by take drum, form as main percussion instrument completely.Except also exerting oneself to diffuse information in many civilization in ancient times as musical instrument external drum.
In middle and primary schools' physics teaching, in order to allow student can understand skinless drum, be how to carry out work, and then the principle of work of demonstration sensor, be preferably by specific demonstrator and carry out primary school, and rarely have now a kind of demonstrator that can demonstrate for skinless drum preferably, greatly hinder the demonstration effect of teaching.
Having notification number is that the patent of CN 203422875 U discloses a kind of skinless drum demonstrator, comprise base, be arranged on the hollow cylinder on base, described hollow cylinder upper end open inner side is provided with sensor, in described base, be provided with control circuit, described sensor connects control circuit, on base, be also provided with the loudspeaker being connected with control circuit, the skinless drum of this structure passes through sensor, cooperation between control circuit and loudspeaker reaches the effect of demonstration skinless drum, but because its inside is provided with control circuit, and there are a plurality of elements control circuit inside, thereby such control circuit inner structure is very complicated, will make the cost of skinless drum greatly promote.
Utility model content
The deficiency existing for prior art, the purpose of this utility model is to provide a kind of simple and easy skinless drum simple in structure, with low cost.
For achieving the above object, the utility model provides following technical scheme: a kind of simple and easy skinless drum, comprise base, be arranged on the hollow cylinder on base, described hollow cylinder upper end open inner side is provided with sensor, in described base, is provided with control circuit, and described sensor connects control circuit, on base, be also provided with the loudspeaker being connected with control circuit, described control circuit is:
One switching tube, this switching tube comprises control end, is coupled to sensor, and first end is coupled to external power source, and the second end, is coupled to loudspeaker.
By adopting technique scheme, by the setting of switching tube, the signal that just can send by sensor carrys out the logical and disconnected of hole switching tube, and then the control loudspeaker sounding of whether switching on, so just can effectively reach the effect that carrys out control loudspeaker by sensor, effectively reach a needed function of skinless drum, its control circuit part is due to a switching tube being only set simultaneously, thereby its inner structure becomes very simple, greatly reduce cost.
The utility model is further set to: described sensor comprises:
Infrared transmitter, is fixed in hollow cylinder upper end open inner side, and couples with external power source;
Infrared receiving terminal, infrared transmitter setting receives the infrared ray that infrared transmitter sends relatively, is also coupled to switch controlled end.
By adopting technique scheme, by the setting of infrared transmitter and infrared receiving terminal, just can effectively the space of hollow cylinder opening part be formed to an infrared induction region, like this when staff stretches into, thereby just can effectively sense that people's hand sends the break-make of Signal-controlled switch pipe.
In the utility model embodiment, wherein switching tube is NMOS pipe.
Infrared transmitter comprises: infrared LED lamp, its plus earth; Pull-up resistor, one end couples external power source, and the other end is coupled to infrared LED lamp anode, and pull-up resistor is coupled between external power source and ground after connecting with infrared LED lamp, and infrared LED lamp adopts the infrared transmitting tube that model is 940.
Infrared receiving terminal comprises: infrared receiving chip, and it comprises power end, is coupled to external power source, earth terminal, direct ground connection, output terminal, is coupled to switch controlled end; Resistance, one end is coupled to external power source, and the other end is coupled to infrared receiving chip output terminal; Electric capacity, one end is coupled to external power source, and the other end is coupled to infrared receiving chip earth terminal, and wherein infrared receiving chip adopts the receiving chip that model is LBST0038L.
Between switching tube and loudspeaker, be also coupled with a LED lamp.
Accompanying drawing explanation
Fig. 1 is the one-piece construction figure of simple and easy skinless drum of the present utility model;
Fig. 2 is the internal circuit diagram of infrared receiving terminal;
Fig. 3 is the internal circuit diagram of infrared transmitter.
In figure: 1, base; 2, hollow cylinder; 3, sensor; 31, infrared emission head; 32, infrared remote receiver; M, switching tube; R, resistance; C, electric capacity; U, infrared receiving chip; S, loudspeaker; RF, pull-up resistor; H, infrared LED lamp.
Embodiment
Infrared integrated formula Receiver LBST0038L, it is when receiving infrared signal, its output terminal output low level, when not receiving infrared signal, its output terminal output high level, thereby just can by low and high level, carry out the break-make of gauge tap pipe M here, further reach the whether effect of sounding of loudspeaker S.
Shown in 2, a kind of simple and easy skinless drum of the present embodiment, comprise base 1, be arranged on the hollow cylinder 2 on base 1, described hollow cylinder 2 upper end open inner sides are provided with sensor 3, in described base 1, are provided with control circuit, and described sensor 3 connects control circuit, on base 1, be also provided with the loudspeaker S being connected with control circuit, described control circuit is:
One switching tube M, this switching tube M comprises control end, is coupled to sensor 3, and first end, is coupled to external power source, and the second end is coupled to loudspeaker S.
By adopting technique scheme, when skinless drum is in the process of work, sensor 3 energising work, whether it will respond to hollow cylinder 2 inside always has hand to put into, if there is no hand puts into, sensor 3 will be exported a signal to switching tube M, not conducting of Simultaneous Switching pipe M, thereby loudspeaker S just can not switch on sounding, when hand being put in hollow cylinder 2, sensor 3 will be responded in one's hands putting into, thereby sensor 3 will send a signal to switching tube M, switching tube M will conducting, electric current on external power source will be applied on loudspeaker S, the loudspeaker S sounding of will switching on, because the occurring principle of loudspeaker S need to pass into rising edge electric current, thereby in hand is put into hollow cylinder 2, loudspeaker S will send, if hand after loudspeaker S sounds also when hollow cylinder 2 is interior, switching tube M conducting always, loudspeaker S will receive a stable electric current always, just can not continue sounding, represent like this tum, when if hand leaves in hollow cylinder 2, switching tube M disconnects, loudspeaker S power-off, now loudspeaker S receives a negative edge, thereby loudspeaker S sounding not, when again hand being put into, switching tube M conducting again, thereby loudspeaker S receives a rising edge sounding, so just can effectively reach the beat a drum effect of sounding of simulation people, and its whole control procedure is all controlled by a switching tube M, so simple and easy skinless drum of the present utility model, simple in structure, with low cost.
Below the course of work of above-mentioned mentioned sensor 3 and principle are described in further detail.
In the time of skinless drum energising work, infrared LED lamp H will electrified light emitting, send infrared signal, a dividing potential drop effect due to pull-up resistor RF, so just there will not be the excessive problem that causes infrared LED lamp H to damage of the upper voltage of infrared LED lamp H that is applied to, when infrared LED lamp H is luminous, infrared receiving chip U in infrared remote receiver will receive infrared ray, according to the principle of work of LBST0038L, at it, receive ultrared time, it exports a low level, again because switching tube M is NMOS pipe, NMOS pipe is high level conduction device, thereby now NMOS manages not conducting, so be not communicated with between external power source and loudspeaker S, loudspeaker S just can not switch on sounding, in the time of in hand extend into hollow cylinder 2, will block infrared ray, now the infrared receiving chip U in infrared remote receiver just cannot receive infrared signal, a thereby high level of output, cause NMOS pipe, in the moment of NMOS pipe conducting, its output level will change from low to high, will form like this rising edge signal is input in loudspeaker S, loudspeaker S will sounding, represent that people now beats a drum, same, when staff is decontroled, will make loudspeaker S reset, so just can effectively reach the effect that simulation people beats a drum, simultaneously by the setting of LED lamp, can effectively increase the style of skinless drum.
In sum, by control circuit, only adopt the setting of a switching tube M, just can effectively simplify skinless drum internal circuit, make the structure of skinless drum become very simple, reduced its cost of manufacture simultaneously.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a simple and easy skinless drum, comprise base, be arranged on the hollow cylinder on base, described hollow cylinder upper end open inner side is provided with sensor, in described base, be provided with control circuit, described sensor connects control circuit, is also provided with the loudspeaker being connected with control circuit on base, it is characterized in that: described control circuit is:
One switching tube, this switching tube comprises control end, is coupled to sensor, and first end is coupled to external power source, and the second end, is coupled to loudspeaker.
2. simple and easy skinless drum according to claim 1, is characterized in that: described sensor comprises:
Infrared transmitter, is fixed in hollow cylinder upper end open inner side, and couples with external power source;
Infrared receiving terminal, infrared transmitter setting receives the infrared ray that infrared transmitter sends relatively, is also coupled to switch controlled end.
3. simple and easy skinless drum according to claim 2, is characterized in that: described infrared transmitter comprises:
Infrared LED lamp, its plus earth;
Pull-up resistor, one end couples external power source, and the other end is coupled to infrared LED lamp anode.
4. simple and easy skinless drum according to claim 2, is characterized in that: described infrared receiving terminal comprises:
Infrared receiving chip, it comprises power end, is coupled to external power source, earth terminal, direct ground connection, output terminal, is coupled to switch controlled end;
Resistance, one end is coupled to external power source, and the other end is coupled to infrared receiving chip output terminal;
Electric capacity, one end is coupled to external power source, and the other end is coupled to infrared receiving chip earth terminal.
5. simple and easy skinless drum according to claim 1, is characterized in that: between described switching tube and loudspeaker, be also coupled with a LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420406531.6U CN203982626U (en) | 2014-07-22 | 2014-07-22 | Simple and easy skinless drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420406531.6U CN203982626U (en) | 2014-07-22 | 2014-07-22 | Simple and easy skinless drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203982626U true CN203982626U (en) | 2014-12-03 |
Family
ID=51980053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420406531.6U Expired - Fee Related CN203982626U (en) | 2014-07-22 | 2014-07-22 | Simple and easy skinless drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203982626U (en) |
-
2014
- 2014-07-22 CN CN201420406531.6U patent/CN203982626U/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: 20141203 Termination date: 20150722 |
|
| EXPY | Termination of patent right or utility model |