CN208861417U - A kind of rechargeable alarm - Google Patents
A kind of rechargeable alarm Download PDFInfo
- Publication number
- CN208861417U CN208861417U CN201821703156.6U CN201821703156U CN208861417U CN 208861417 U CN208861417 U CN 208861417U CN 201821703156 U CN201821703156 U CN 201821703156U CN 208861417 U CN208861417 U CN 208861417U
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- alarm
- control circuit
- circuit board
- chip
- rechargeable
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Abstract
The utility model discloses a kind of rechargeable alarms, it includes shell, control circuit board, polymer battery, power switch；The control circuit board, polymer battery are installed in shell；Polymer battery provides electric power support for control circuit board, and connect with power switch；The control circuit board is equipped with battery charger, alarm control circuit, power amplification circuit, buzzer；Battery charger, alarm control circuit, power amplification circuit, buzzer are successively electrically connected；The utility model alarm sound can be converted, to realize a variety of alarm sounds.
Description
Technical field
The utility model relates to a kind of alarms, and in particular to a kind of rechargeable alarm.
Background technique
Existing alarm, structure is complicated, and alarm sound is single, and tone is not high, and warning effect is bad.
Utility model content
The purpose of this utility model is that in view of the drawbacks of the prior art and insufficient, provide that a kind of structure is simple, design is closed
Reason, rechargeable alarm easy to use.
In order to achieve the above purposes, the technical solution adopted by the utility model is:, and it includes shell, control circuit board, polymerization
Object battery, power switch；The control circuit board, polymer battery are installed in shell；Polymer battery is control electricity
Road plate provides electric power support, and connect with power switch；The control circuit board is equipped with battery charger, controlling alarm
Circuit, power amplification circuit, buzzer；Battery charger, alarm control circuit, power amplification circuit, buzzer are successively electric
Property connection；
Further, the battery charger uses 4054-SOT23-5 charging chip, 4054-SOT23-5 charging
Chip is connect with external charging USB interface；
Further, the alarm control circuit uses AT51D-SOP8 alarm chip；AT51D-SOP8 alarm chip
By MCU mcu programming, a variety of alarm sounds are integrated；The input and output pin of AT51D-SOP8 alarm chip is opened with model selection
Connection connects；
Further, the power amplification circuit includes SS8050 triode and boost inductance, is used to form higher electricity
The audio signal of pressure.
After adopting the above structure, the utility model has the beneficial effect that a kind of rechargeable alarm described in the utility model,
Alarm sound can be converted, to realize a variety of alarm sounds, and have structure is simple, setting is reasonable, cost of manufacture is low etc.
Advantage.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of internal structure of the utility model；
Fig. 2 is the circuit diagram of the utility model.
Description of symbols:
1, battery charger；2, alarm control circuit；3, power amplification circuit；4, buzzer.
Specific embodiment
With reference to the accompanying drawing, the utility model is further described.
Referring to shown in Fig. 1, present embodiment the technical solution adopted is that: it includes shell, control circuit board, polymerization
Object battery, power switch；The control circuit board, polymer battery are installed in shell；Polymer battery is control electricity
Road plate provides electric power support, and connect with power switch；The control circuit board is equipped with battery charger 1, alarm control
Circuit 2 processed, power amplification circuit 3, buzzer 4；Battery charger 1, alarm control circuit 2, power amplification circuit 3, buzzing
Device 4 is successively electrically connected；
Referring to shown in Fig. 2, the battery charger uses 4054-SOT23-5 charging chip, and 4054-SOT23-5 fills
Electrical chip is connect with external charging USB interface P2；
The alarm control circuit uses AT51D-SOP8 alarm chip；AT51D-SOP8 alarm chip is by MCU monolithic
Machine programming, integrating a variety of alarm sounds, (alarm that ticks/toot toot alarm) , Summerside thinks the alarm that ticks；AT51D-
The input and output pin PAO/INTO pin of SOP8 alarm chip is connect with mode selection switch MODE, for selecting sound mould
Formula；Present embodiment, which was now set in 10 seconds, continuously to be pulled in tertiary switch selection of times AT51D-SOP8 alarm chip
The sound in portion can be achieved with the function of Transform Acoustic；
The power amplification circuit includes SS8050 triode and boost inductance L1, is used to form the audio of high voltage
Signal.
The alarm principle that present embodiment uses are as follows: turn on the power switch, alarm work once electrified, dynamic and static contact
It disconnects, starts alarm, after AT51D-SOP8 alarm chip receives alarm signal, through oscillation resistance, generate audio signal in inside,
Through signal output end PAO/INTO, it is sent into SS8050 triode, carries out power amplification, the amplified boosted inductance of audio signal
L1 coupling, becomes the audio signal of a high voltage, and driving buzzer issues loud alarm signal.
The charging principle of present embodiment are as follows: the charging modes of polymer battery are pressure limiting constant currents, are by 4054-
The control of SOT23-5 charging chip, charging modes are using the voltage for first detecting battery to be charged, be first if voltage is lower than 3V
It is pre-charged, charging current is the 1/10 of setting electric current, after voltage is raised to 3V, into standard charging process；Standard charging mistake
Journey are as follows: constant-current charge is carried out with setting electric current, when cell voltage is raised to 4.2V, is changed to constant-voltage charge, holding charging voltage is
4.2V；At this point, charging current is gradually reduced, when electric current drops to the 1/10 of setting charging current, charging terminates.
The above is only to illustrate the technical solution of the utility model, rather than limits those of ordinary skill in the art couple
The other modifications or equivalent replacement that the technical solution of the utility model is made, without departing from technical solutions of the utility model
Spirit and scope should all cover in the scope of the claims of the utility model.
Claims (4)
1. a kind of rechargeable alarm, it is characterised in that: it includes shell, control circuit board, polymer battery, power switch；
The control circuit board, polymer battery are installed in shell；Polymer battery provides electric power support for control circuit board,
And it is connect with power switch；The control circuit board is equipped with battery charger, alarm control circuit, power amplification electricity
Road, buzzer；Battery charger, alarm control circuit, power amplification circuit, buzzer are successively electrically connected.
2. a kind of rechargeable alarm according to claim 1, it is characterised in that the battery charger uses
4054-SOT23-5 charging chip, 4054-SOT23-5 charging chip are connect with external charging USB interface.
3. a kind of rechargeable alarm according to claim 1, it is characterised in that the alarm control circuit uses
AT51D-SOP8 alarm chip；AT51D-SOP8 alarm chip integrates a variety of alarm sounds by MCU mcu programming；AT51D-
The input and output pin of SOP8 alarm chip is connect with mode selection switch.
4. a kind of rechargeable alarm according to claim 1, feature include in the power amplification circuit
SS8050 triode and boost inductance are used to form the audio signal of high voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821703156.6U CN208861417U (en) | 2018-10-20 | 2018-10-20 | A kind of rechargeable alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821703156.6U CN208861417U (en) | 2018-10-20 | 2018-10-20 | A kind of rechargeable alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208861417U true CN208861417U (en) | 2019-05-14 |
Family
ID=66421312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821703156.6U Active CN208861417U (en) | 2018-10-20 | 2018-10-20 | A kind of rechargeable alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208861417U (en) |
-
2018
- 2018-10-20 CN CN201821703156.6U patent/CN208861417U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |