CN103474056B

CN103474056B - Electronic chirp

Info

Publication number: CN103474056B
Application number: CN201210184207.XA
Authority: CN
Inventors: 连彦翔; 杨挺
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-06
Filing date: 2012-06-06
Publication date: 2016-01-06
Anticipated expiration: 2032-06-06
Also published as: CN103474056A

Abstract

The invention provides a kind of electronic chirp, there is an audio IC, tone setting resistance, a power circuit and a hummer, wherein this audio IC has a built-in oscillatory circuit, and be provided with two two oscillation frequency be connected with oscillatory circuit and set pin, connect this tone setting resistance between two oscillation frequency setting pins, use the tone that this audio of setting IC exports sound; The electric energy output of power circuit is mainly controlled by user, make audio IC control this hummer and send sound as whistle, thus, its oscillation frequency can be controlled by tone setting resistance and the built-in oscillatory circuit of audio IC, use to reduce and use electronic component use amount, thus the volume of electronic chirp can be reduced, to be convenient for carrying, and product yield can be improved and reduce the cost manufactured.

Description

Electronic chirp

Technical field

The present invention is a kind of electronic chirp, particularly relates to a kind of electronic chirp reducing volume and carry with person easy to use.

Background technology

General whistle possesses many functions, such as:

1. traffic-police can remind useful passerby to note by blowing whistle, and notes its gesture, use and direct traffic for passerby.

2., in ball game, judge and remind the staff on both sides sportsman and limit, field to note by blowing whistle, to make various ruling, such as suspension, coordinate gesture illustrate foul sportsman, time-out or other etc. situation.

3. when suffering from robbery (espespecially women), blown whistle by the whistle carried with, to draw back ruffian with fear and to cause other people to note requiring assistance.

Tradition whistle is by user's air blowing toot whistle, Taiwan new patent is weighed No. M245574 and is disclosed a kind of electronic chirp, this electronic chirp does not blow can send loud and clear sound for a long time via mouth, therefore comparatively health on using, as shown in Figure 3, the aforementioned electronic whistle includes a body and a keyswitch formed, an IC90 is provided with again in body, most resistance R1 ~ R3, one electric capacity C1, one inductance L 1, one transistor Q1 and a hummer 91, wherein resistance R2, R3 is oscillation resistance, and combine with electric capacity C1 and to shake oscillation functions to produce rank, operate to produce drive singal drive IC 90 further, therefore by this keyswitch to order about this oscillation resistance R2, R3 and electric capacity C1 vibrates, use drive IC 90 to run, this IC90 sends the resistance R1 of signal via IC90 another end immediately, transistor Q1 and inductance L 1 are carried out boosting and are amplified, the whistle sound is produced to drive hummer 91.

Above-mentioned oscillation resistance R2, R3 and electric capacity C1 combination can produce rank and to shake oscillation functions, precisely because use number of elements too much, easily cause electronic chirp bulky and not portable, and this shortcoming causes higher manufacturing cost simultaneously, in view of the above problems, be necessary self-criticism in fact, and seek feasible solution.

Summary of the invention

In view of the shortcoming of above-mentioned prior art, fundamental purpose of the present invention is to provide a kind of electronic chirp, mainly by the object that reduction volume carries to reach person easy to use.

For reaching the technological means that above-mentioned purpose is taked, described electronic chirp is made to comprise:

One audio IC, the database of its built-in audio and music, and in have an oscillatory circuit, this audio IC is separately provided with a power supply input pin, two oscillation frequency setting pins and audio frequency output connecting pins, and two oscillation frequency setting pins are connected with built-in oscillatory circuit respectively;

One tone setting resistance is that two oscillation frequency being connected to aforementioned audio IC set between pins;

One power circuit, is provided with a Mobile electric power and a change-over switch, and this action power supply inputs pin via change-over switch with the power supply of aforementioned audio IC to be connected;

One hummer, mainly be connected with the audio frequency output connecting pin of audio IC by a boosting amplifying circuit, this boosting amplifying circuit is mainly made up of a bias resistance, a transistor and an inductance, this hummer one end is connected with power circuit by inductance, another end is connected with the collector of transistor, and the base stage of this transistor and bias resistance are electrically connected with the audio frequency output connecting pin of audio IC;

According to the electronic chirp that above-mentioned structure is formed, mainly set by single tone the frequency that resistance sets the built-in oscillatory circuit of audio IC, and then the drive singal making audio IC export setpoint frequency produces electronics birdie to drive hummer.Owing to adopting the audio IC of built-in oscillatory circuit, therefore single tone setting resistance is only needed can to complete the tone setting of electronics birdie, therefore effectively can reduce the use amount of electronic component, and then the volume of electronic chirp can be reduced, because the use amount of electronic component reduces, the yield of product can be improved, and reduce its manufacturing cost further.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the circuit structure block diagram according to the embodiment of the present invention;

Fig. 2 is the detailed circuit diagram according to the embodiment of the present invention;

Fig. 3 is the circuit structure block diagram of prior art.

Embodiment

Below coordinating preferred embodiment graphic and of the present invention, setting forth the technological means that the present invention takes for reaching predetermined goal of the invention further.

About a preferred embodiment of the present invention, please refer to Fig. 1, this electronic chirp includes an audio IC10, a tone setting resistance R1, power circuit 20 and a hummer 30, wherein:

Please coordinate with reference to shown in figure 2, there is in this audio IC10 the database of audio and music, and in have an oscillatory circuit, separately be provided with a power supply input pin VDD, two oscillation frequency setting pin X, a Y and audio frequency output connecting pin BZ, two oscillation frequency setting pin X, Y are connected with built-in oscillatory circuit respectively, in the present embodiment, this audio IC10 model is PSG61, and makes audio IC10 pin K4 ground connection.

This tone setting resistance R1 is that two oscillation frequency being connected to aforementioned audio IC10 set between pin X, Y, mainly in order to set the oscillation frequency of the built-in oscillatory circuit of audio IC10, and then control the tone of audio IC output sound signal, in the present embodiment, the resistance of this tone setting resistance R1 is 100K ohm, and this oscillatory circuit of arranging in pairs or groups makes to produce the oscillation frequency for audio IC10 normal operation.

This power circuit 20 is provided with Mobile electric power 21 and a change-over switch 22, in the present embodiment, this action power supply 21 is batteries, and this change-over switch 22 is normal open switch, after pressing toggle switch 22, the electric energy of this action power supply 21 then exports the power supply input pin VDD of this audio IC10 to.

In the present embodiment, this hummer 30 is connected with the audio frequency output connecting pin BZ of audio IC10 by a boosting amplifying circuit, and this boosting amplifying circuit is mainly made up of a bias resistance R2, a transistor Q1, an inductance L 1, wherein, this hummer 30 one end is connected with power circuit 20 by inductance L 1, another end is connected with the collector of transistor Q1, the base stage of another this transistor Q1 is electrically connected with the audio frequency output connecting pin BZ of audio IC10 after this bias resistance of series connection R2, and transistor Q1 is a NPN transistor, furthermore, this inductance L 1 has one first pin L11, one second pin L22 and the 3rd pin L33, 3rd pin L33 is connected with the change-over switch 22 of power circuit 20, first pin L11 and the second pin L22 is connected with hummer 30 two ends respectively again, hummer 30 inside is a piezoelectric element again, therefore the sound size that hummer 30 sends is controlled by both end voltage difference, voltage difference is larger, sound is larger, otherwise, voltage difference is less, then sound is less by 1.

The fundamental purpose of above-mentioned audio IC10 pin K4 ground connection is the drive singal first making audio frequency output connecting pin BZ export a birdie sound, this tone setting resistance R1 that arranges in pairs or groups again sets its audio IC10 and exports tone, can reach the object making hummer 30 produce the whistle sound.

Above-mentioned Mobile electric power 21 is provided with an electric capacity C1 further between positive pole and ground connection, uses the interference of filtering Mobile electric power 21 instability, to increase the stability of electronic chirp.

According to the electronic chirp that above-mentioned structure is formed, it mainly controls the break-make of this change-over switch 22 by user, to determine whether this electronic chirp sounds, therefore when not conducting, then the sound can not be sent, otherwise, when change-over switch 22 conducting, the electric energy of this action power supply 21 then exports power supply input pin VDD and the hummer 30 of audio IC10 respectively to, wherein, this audio IC10 then sets resistance R1 collective oscillation by this built-in oscillatory circuit and this tone and produces a reference signal, for audio IC10 normal operation, and by audio settings resistance R1 and this pin K4, drive singal just like tone as whistle can be exported to the base stage of this transistor Q1 from audio frequency output connecting pin BZ, drive singal is to control its transistor Q1 break-make by this, therefore at transistor Q1, on the loop that hummer 30 and power circuit 20 are formed, this loop break-make accordingly can be made by the break-make controlling transistor Q1, when the base stage that drive singal adds to transistor Q1 makes its conducting, these hummer 30 two ends have voltage difference because of inductance L 1, therefore hummer 30 can be made to send the loud boatswain's pipe sound, otherwise, when transistor Q1 ends, then the sound can not be sent, wherein, this audio IC10 sets this oscillation frequency by this audio settings resistance R1, use the tone controlling to export, namely the electric capacity that volume is larger need not be used thus, and the use amount of passive device can be reduced, therefore effectively can reduce the volume of electronic chirp, again because the use amount of passive device can be reduced by this, therefore can manufacturing cost be reduced.

The above is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims

1. an electronic chirp, is characterized in that, described electronic chirp comprises:

One audio IC, the database of its built-in audio and music, and in have an oscillatory circuit, described audio IC is provided with a power supply input pin, two oscillation frequency setting pins and audio frequency output connecting pins, and two oscillation frequency setting pins are connected with built-in oscillatory circuit respectively;

One tone setting resistance, two oscillation frequency being connected to described audio IC set between pins;

One power circuit, is provided with a Mobile electric power and a change-over switch, and described Mobile electric power inputs pin via change-over switch with the power supply of described audio IC and is connected;

One hummer, be connected with the audio frequency output connecting pin of audio IC by a boosting amplifying circuit, described boosting amplifying circuit is by a bias resistance, one transistor and inductance composition, the two ends of described bias resistance are electrically connected with the audio frequency output connecting pin of described audio IC and the base stage of described transistor respectively, described inductance has one first pin, one second pin and one the 3rd pin, described second pin is between described first pin and described 3rd pin, described first pin and described second pin are connected to the two ends of described hummer respectively, and described second pin is connected to the collector of described transistor further, described 3rd pin is electrically connected to the change-over switch of this power circuit.

2. electronic chirp according to claim 1, is characterized in that, described transistor is a NPN transistor.

3. electronic chirp according to claim 2, is characterized in that, described change-over switch is a normal open switch, and described Mobile electric power is a battery.

4. electronic chirp according to any one of claim 1 to 3, is characterized in that, the integrated circuit of described audio IC to be a model be PSG61, and its pin K4 ground connection.

5. electronic chirp according to claim 4, is characterized in that, described Mobile electric power is provided with an electric capacity further between its positive pole and ground connection.