CN208386878U - A kind of timing switch circuit and children's headphone of children's headphone - Google Patents
A kind of timing switch circuit and children's headphone of children's headphone Download PDFInfo
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- CN208386878U CN208386878U CN201821027414.3U CN201821027414U CN208386878U CN 208386878 U CN208386878 U CN 208386878U CN 201821027414 U CN201821027414 U CN 201821027414U CN 208386878 U CN208386878 U CN 208386878U
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- headphone
- switch
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Abstract
The utility model relates to a kind of timing switch circuit of children's headphone and children's headphone, timing switch circuit therein includes power supply circuit, real time clock circuit and switching circuit；The signal input part of the switching circuit is connected with the audio signal wire that the signal input part of the real time clock circuit passes through children's headphone with plug, the input end of clock of the switching circuit is connect with the output terminal of clock of the real time clock circuit, the signal output end of the switching circuit is connect with the signal input part of the loudspeaker of children's headphone, and the power supply output end of the power supply circuit is connect with the energization input of the switching circuit.Real time clock circuit and switching circuit is added in the utility model in conventional earphone, by real time clock circuit to audio-frequence player device to the time of earphone output audio signal carry out timing, and switching circuit is controlled according to timing situation, the timed power on/off for realizing earphone avoids the problem that the hearing user due to caused by long periods of wear earphone declines.
Description
Technical field
The utility model relates to earphone fields, and in particular to a kind of timing switch circuit of children's headphone and children
Headphone.
Background technique
In life, more and more children can wear earphone in study or amusement, and the children of growth stage, hearing is also
In the stage of development, the sense of hearing is more sensitive compared to adult, and earphone is very big for the hearing influence of children, and aurist appeals
The time that uses of earphone is controlled, but children are often difficult to control, institute due to lacking ability of self control using the time of earphone
It is more and more to there is the case where tinnitus, Hearing with present children, majority is all since long-time is worn caused by earphone.
Utility model content
In view of the above technical problems, the utility model provides timing switch circuit and the children of a kind of children's headphone
Headphone.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of time switch of children's headphone
Circuit, including power supply circuit, real time clock circuit and switching circuit；
The signal input part of the signal input part of the switching circuit and the real time clock circuit passes through the children
The audio signal wire of headphone is connected with plug, the input end of clock of the switching circuit and real-time clock electricity
The output terminal of clock on road connects, the signal of the loudspeaker of the signal output end of the switching circuit and children's headphone
Input terminal connection, the power supply output end of the power supply circuit are connect with the energization input of the switching circuit.
Based on the above technical solution, the utility model can also do following improvement.
Further, the real time clock circuit circuit include: clock chip, first resistor, second resistance, 3rd resistor and
4th resistance；
When the first resistor, second resistance, 3rd resistor are used as described real-time after connecting with the first end of the 4th resistance
The signal input part of clock circuit, the second end of the first resistor are connect with the vdd terminal of the clock chip, the second resistance
Second end connect respectively with the end INT of the clock chip and the switching circuit, the second end of the 3rd resistor and institute
The end the SCL connection of clock chip is stated, the second end of the 4th resistance is connect with the end SDA of the clock chip.
Further, the clock chip is SD2405AL.
Further, the switching circuit include: d type flip flop, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance,
First switch tube, second switch and inductance；
The end D of the d type flip flop passes through the 5th resistance eutral grounding, the end PRE of the d type flip flop and the second resistance
Second end connection, the end VCC of the d type flip flop is the energization input of the switching circuit, and the end Q of the d type flip flop is logical
It crosses the 6th resistance to connect with the control terminal of the first switch tube, the cold end ground connection of the first switch tube is described
The hot end of first switch tube is connect with the first end of the 7th resistance, the second end of the 7th resistance respectively with it is described
The first end of 8th resistance is connected with the control terminal of the second switch, and the second end of the 8th resistance and described second is opened
Signal input part after the hot end connection of pass pipe as the switching circuit, the cold end of the second switch and institute
The first end connection of inductance is stated, the second end of the inductance is connect with the loudspeaker.
Further, the first switch tube is NPN type triode, base stage, collector and the transmitting of the NPN type triode
Pole is respectively control terminal, hot end and the cold end of the first switch tube.
Further, the second switch is metal-oxide-semiconductor, and the grid of the metal-oxide-semiconductor, source electrode and drain electrode are respectively described second
Control terminal, hot end and the cold end of switching tube.
To realize above-mentioned purpose of utility model, the utility model also provides a kind of children's headphone, including above-mentioned youngster
The timing switch circuit of virgin headphone.
The beneficial effects of the utility model are: real time clock circuit and switching circuit are added in conventional earphone, pass through reality
When clock circuit timing is carried out to the time of earphone output audio signal to audio-frequence player device, and according to timing situation to switch
Circuit is controlled, and realizes the timed power on/off of earphone, and the hearing user due to caused by long periods of wear earphone is avoided to decline
Problem.
Detailed description of the invention
Fig. 1 is a kind of structural frames of the timing switch circuit of children's headphone provided by the embodiment of the utility model
Figure；
Fig. 2 is the circuit structure diagram of real time clock circuit provided by the embodiment of the utility model；
Fig. 3 is the circuit structure diagram of switching circuit provided by the embodiment of the utility model.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Fig. 1 is a kind of timing switch circuit of children's headphone provided by the embodiment of the utility model, such as Fig. 1 institute
Show, which includes power supply circuit, real time clock circuit and switching circuit；
The signal input part of the signal input part of the switching circuit and the real time clock circuit passes through the children
The audio signal wire of headphone is connected with plug, the input end of clock of the switching circuit and real-time clock electricity
The output terminal of clock on road connects, the signal of the loudspeaker of the signal output end of the switching circuit and children's headphone
Input terminal connection, the power supply output end of the power supply circuit are connect with the energization input of the switching circuit.
The utility model by between the plug and loudspeaker of children's headphone access switching circuit and it is real-time when
Clock circuit carries out timing by working time of the real time clock circuit to earphone, and is carried out according to timing situation to switching circuit
Control, the on-off for the audio signal that switching circuit control inputs audio-frequence player device by headset plug to loudspeaker, thus
The timed power on/off for realizing earphone avoids the problem that children's hearing user due to caused by long periods of wear earphone declines.
Fig. 2 is the circuit structure diagram of real time clock circuit provided by the utility model, as shown in Fig. 2, real time clock circuit
Circuit includes: clock chip U1, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4；
When the first resistor, second resistance, 3rd resistor are used as described real-time after connecting with the first end of the 4th resistance
The signal input part of clock circuit, the second end of the first resistor are connect with the vdd terminal of the clock chip, the second resistance
Second end connect respectively with the end INT of the clock chip and the switching circuit, the second end of the 3rd resistor and institute
The end the SCL connection of clock chip is stated, the second end of the 4th resistance is connect with the end SDA of the clock chip.
Optionally, in this embodiment, the clock chip is SD2405AL, it is possible to use other clock chips.
Fig. 3 is the circuit structure diagram of switching circuit provided by the embodiment of the utility model, as shown in figure 3, the switch is electric
Road includes: d type flip flop, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first switch tube, second switch and electricity
Sense；
The end D of the d type flip flop passes through the 5th resistance eutral grounding, the end PRE of the d type flip flop and the second resistance
Second end connection, the end VCC of the d type flip flop is the energization input of the switching circuit, and the end Q of the d type flip flop is logical
It crosses the 6th resistance to connect with the control terminal of the first switch tube, the cold end ground connection of the first switch tube is described
The hot end of first switch tube is connect with the first end of the 7th resistance, the second end of the 7th resistance respectively with it is described
The first end of 8th resistance is connected with the control terminal of the second switch, and the second end of the 8th resistance and described second is opened
Signal input part after the hot end connection of pass pipe as the switching circuit, the cold end of the second switch and institute
The first end connection of inductance is stated, the second end of the inductance is connect with the loudspeaker.
Specifically, d type flip flop selects a d type flip flop with low level set, selected in the present embodiment
SN74AC74PWR can also select the other products with the function.
Optionally, in this embodiment, the first switch tube U3 is NPN type triode, the base of the NPN type triode
Pole, collector and emitter are respectively control terminal, hot end and the cold end of the first switch tube U3.
The second switch U4 is metal-oxide-semiconductor, and grid G, source S and the drain D of the metal-oxide-semiconductor are respectively described second to open
Close control terminal, hot end and the cold end of pipe U4.
The working principle of above-mentioned timing switch circuit is as follows:
As shown in Figures 2 and 3, the present embodiment using clock chip SD2405AL the end INT export clock pulses as
Switching on and shutting down pulse signal realizes the timed power on/off of earphone with the d type flip flop with low level set is unified.When in use,
The end PRE of d type flip flop and the end INT of SD2405AL are connected, circuit can be made to have, suspend mode and wake-up are carried out with preset time
Function, wherein the period of the clock pulses of clock chip output will be configured in advance when leaving the factory.
After headset plug is inserted into audio-frequence player device by user, when the audio signal IN of audio-frequence player device output is triggered
When the rising edge for the clock pulse signal that the end INT of clock chip U1 generates reaches d type flip flop U2, the 5 feet output of U2 is high level,
Since 5 feet of U2 are connected with 1 foot of base stage of U3, then U3 is connected, and the grid of U4 is low level, and U4 is connected at this time, and audio broadcasting is set
The audio signal IN of standby input is connected with output OUT, speaker operation.It has been more than clock pulses when the duration of audio signal
When the duration of signal, then the failing edge for the clock pulses that U1 is issued will reach U2, and 5 feet of U2 is made to be set to low electricity
Flat, U3 and U4 cut-off, loudspeaker do not work, at this point, to U1 output audio signal, (i.e. user is not if audio-frequence player device continues
Stop playing audio and do not extract headset plug), it has been more than the interval time of clock pulses when the duration of audio signal
When, the end INT of U1 generates clock pulse signal again, and 5 foot of output of U2 is made to be set to high level, and U3 is connected, then the grid of U4
The audio signal IN of extremely low level, U4 conducting, audio-frequence player device input is connected with output OUT, and loudspeaker works on.
The present invention also provides a kind of children's headphone, the timing switch circuit including above-mentioned children's headphone.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (7)
1. a kind of timing switch circuit of children's headphone, which is characterized in that including power supply circuit, real time clock circuit and
Switching circuit；
The signal input part of the signal input part of the switching circuit and the real time clock circuit passes through the children and wears
The audio signal wire of formula earphone is connected with plug, the clock of the input end of clock of the switching circuit and the real time clock circuit
The signal input part of the loudspeaker of output end connection, the signal output end of the switching circuit and children's headphone connects
It connects, the power supply output end of the power supply circuit is connect with the energization input of the switching circuit.
2. the timing switch circuit of children's headphone according to claim 1, which is characterized in that the real-time clock
Circuit circuit includes: clock chip, first resistor, second resistance, 3rd resistor and the 4th resistance；
The first resistor, second resistance, 3rd resistor are electric as the real-time clock after connecting with the first end of the 4th resistance
The signal input part on road, the second end of the first resistor are connect with the vdd terminal of the clock chip, and the of the second resistance
Two ends are connect with the end INT of the clock chip and the switching circuit respectively, the second end of the 3rd resistor and it is described when
The end SCL of clock chip connects, and the second end of the 4th resistance is connect with the end SDA of the clock chip.
3. the timing switch circuit of children's headphone as claimed in claim 2, which is characterized in that the clock chip is
SD2405AL。
4. the timing switch circuit of children's headphone as claimed in claim 2 or claim 3, which is characterized in that the switch electricity
Road includes: d type flip flop, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first switch tube, second switch and electricity
Sense；
The end D of the d type flip flop is by the 5th resistance eutral grounding, and the of the end PRE of the d type flip flop and the second resistance
The connection of two ends, the end VCC of the d type flip flop are the energization input of the switching circuit, and the end Q of the d type flip flop passes through institute
It states the 6th resistance to connect with the control terminal of the first switch tube, the cold end ground connection of the first switch tube, described first
The hot end of switching tube is connect with the first end of the 7th resistance, and the second end of the 7th resistance is respectively with the described 8th
The first end of resistance is connected with the control terminal of the second switch, the second end and the second switch of the 8th resistance
Hot end connection after signal input part as the switching circuit, the cold end of the second switch and the electricity
The first end of sense connects, and the second end of the inductance is connect with the loudspeaker.
5. the timing switch circuit of children's headphone as claimed in claim 4, which is characterized in that the first switch tube
For NPN type triode, the base stage of the NPN type triode, collector and emitter are respectively the control of the first switch tube
End, hot end and cold end.
6. the timing switch circuit of children's headphone as claimed in claim 5, which is characterized in that the second switch
For metal-oxide-semiconductor, the grid of the metal-oxide-semiconductor, source electrode and drain electrode are respectively control terminal, hot end and the low electricity of the second switch
Position end.
7. a kind of children's headphone, which is characterized in that including children's wear-type ear as claimed in any one of claims 1 to 6
The timing switch circuit of machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821027414.3U CN208386878U (en) | 2018-06-29 | 2018-06-29 | A kind of timing switch circuit and children's headphone of children's headphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821027414.3U CN208386878U (en) | 2018-06-29 | 2018-06-29 | A kind of timing switch circuit and children's headphone of children's headphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208386878U true CN208386878U (en) | 2019-01-15 |
Family
ID=64965309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821027414.3U Expired - Fee Related CN208386878U (en) | 2018-06-29 | 2018-06-29 | A kind of timing switch circuit and children's headphone of children's headphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208386878U (en) |
-
2018
- 2018-06-29 CN CN201821027414.3U patent/CN208386878U/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: 20190115 Termination date: 20190629 |