CN204729938U - A kind of chargeable flashlight - Google Patents
A kind of chargeable flashlight Download PDFInfo
- Publication number
- CN204729938U CN204729938U CN201520346485.XU CN201520346485U CN204729938U CN 204729938 U CN204729938 U CN 204729938U CN 201520346485 U CN201520346485 U CN 201520346485U CN 204729938 U CN204729938 U CN 204729938U
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- battery
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- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a kind of chargeable flashlight, flashlight one end is provided with plug, the other end is provided with optically focused head, the sidewall of flashlight is provided with switch, flashlight inside is provided with charging circuit, comparison circuit, reference voltage and battery, the input of transforming circuit is connected with plug, the cathode output end of transforming circuit is connected with the output cathode of the output common port of relay and optocoupler, the output normal-closed end of relay is connected with the electrode input end of charging circuit, and the output Chang Kaiduan of relay is connected with an input of relay and optocoupler output negative pole.The utility model by relay, disconnects transforming circuit and charging circuit, charging circuit is disconnected completely after battery is full of, and avoids the charging be full of to battery after electricity, avoids situation about overcharging.
Description
Technical field
The utility model relates to flashlight art, particularly relates to a kind of chargeable flashlight.
Background technology
Existing chargeable flashlight includes battery, the circuit preventing from overcharging is had during charge in batteries, but existing circuit is all when being full of, charging circuit does not export, after having spent a period of time, cell voltage has declined a little a little, then charging circuit can charge again, just having there is the situation of floating charge in this, is easy to cause the life-span of flash-light battery to reduce.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of chargeable flashlight, solves the problem that flash-light battery overcharges.
The utility model is achieved in that a kind of chargeable flashlight, flashlight one end is provided with plug, the other end is provided with optically focused head, the sidewall of flashlight is provided with switch, flashlight inside is provided with charging circuit, comparison circuit, reference voltage and battery, the input of transforming circuit is connected with plug, the cathode output end of transforming circuit is connected with the output cathode of the output common port of relay and optocoupler, the output normal-closed end of relay is connected with the electrode input end of charging circuit, the output Chang Kaiduan of relay is connected with an input of relay and optocoupler output negative pole, the cathode output end of charging circuit and the positive pole of battery, the electrode input end of comparison circuit connects, the negative input of comparison circuit is connected with reference voltage, the output of comparison circuit is connected with the electrode input end of optocoupler, another input of relay, the cathode output end of transforming circuit, the negative input of charging circuit, the cathode output end of charging circuit, the negative pole of battery and the negative input ground connection of optocoupler, the bulb of optically focused head is connected with battery by switch.
The utility model tool has the following advantages: by relay, disconnects transforming circuit and charging circuit after battery is full of, and charging circuit is disconnected completely, avoids the charging be full of to battery after electricity, avoids situation about overcharging.
Accompanying drawing explanation
Fig. 1 is the structure chart of the utility model circuit.
Fig. 2 is the circuit diagram of the utility model circuit.
Detailed description of the invention
By describing technology contents of the present utility model, structural feature in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with embodiment.
Refer to Fig. 1 and Fig. 2, the utility model provides a kind of chargeable flashlight, flashlight one end is provided with plug 1, the other end is provided with optically focused head 2, the sidewall of flashlight is provided with switch 3, flashlight inside is provided with charging circuit, comparison circuit, reference voltage and battery BT1, the input of transforming circuit is connected with plug, the cathode output end of transforming circuit is connected with the output cathode of the output common port of relay LS1 and optocoupler U1, the output normal-closed end of relay is connected with the electrode input end of charging circuit, the output Chang Kaiduan of relay is connected with an input of relay and optocoupler output negative pole, the cathode output end of charging circuit and the positive pole of battery BT1, the electrode input end of comparison circuit connects, the negative input of comparison circuit is connected with reference voltage, the output of comparison circuit is connected with the electrode input end of optocoupler, another input of relay, the cathode output end of transforming circuit, the negative input of charging circuit, the cathode output end of charging circuit, the negative pole of battery and the negative input ground connection of optocoupler, the bulb of optically focused head is connected with battery by switch.
Wherein, relay is five pin relays, and under input no power state, the output common port of relay is connected with output normal-closed end, and under the state of input energising, the output common port of relay can be connected with output Chang Kaiduan.According to the voltage of different input, common model has varied, as the JQC-3F etc. of the SRD-12VDC-SL-C of 12V, 5V.Optocoupler is when input is energized, and inner light emitting diode can be luminous, makes the triode ON of output.Common model has PC817, TLP351 etc.Transforming circuit for realizing the transformation of voltage, thus produces DC voltage, changes to DC voltage by alternating voltage.Common transforming circuit has charger for mobile phone etc.Charging circuit is used for the voltage of potential circuit to be charged in battery, and charging circuit can realize voltage detecting, voltage x current control etc., can ensure the safety of battery.Comparison circuit is for realizing the comparison of reference voltage and battery tension, and when battery is full of, the voltage of battery can higher than reference voltage, now comparison circuit exports high level, if battery is not full of, then battery tension is lower than reference voltage, now comparison circuit output low level.Reference voltage is exactly a stable voltage, simply can carry out electric resistance partial pressure realization to the voltage of transforming circuit, requires that the high reference voltage chip that can adopt realizes stable reference voltage accurately.
In use, transforming circuit exports DC voltage after connecting external voltage to the utility model, and now the output common port of relay is interconnected with output Chang Kaiduan, and transforming circuit is connected with charging circuit, and charging circuit charges a battery.Now battery is not also full of electricity, and voltage is lower, comparison circuit output low level, and optocoupler does not work, and relay does not also work.After battery is full of electricity, battery tension raises, battery tension is greater than reference voltage, now optocoupler luminescence work, optocoupler triode ON, the cathode voltage of transforming circuit is made to be added to the input of relay, relay input is made to obtain electric and start adhesive, after adhesive, the output common port of relay is connected with output Chang Kaiduan, the cathode output end of transforming circuit is made directly to receive the input of relay, the energising of guard relay, relay can be remained on always and export common port and the state that is connected of output Chang Kaiduan, thus be disconnected the physical connection of transforming circuit and charging circuit, battery is not recharged.Even if battery tension declines to some extent, also can not affect the work of relay, namely relay still can keep the state that the connection of transforming circuit and charging circuit disconnects.And when needs charge again to battery, only need the power supply disconnecting transforming circuit, then once charge on the power supply connecting transforming circuit can carry out.Thus avoiding when power supply connects, battery tension declines the problem will carrying out charging a little.The utility model has completely cut off transforming circuit and charging circuit physically, it also avoid transforming circuit to problems such as the electromagnetic interference of charging voltage.During the switch opens that torch leads to, the electricity of battery can be received on bulb, and bulb is lighted, and the light of bulb can be pooled a light beam by optically focused head.
The foregoing is only embodiment of the present utility model; not thereby scope of patent protection of the present utility model is limited; every utilize the utility model description and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (1)
1. a chargeable flashlight, it is characterized in that: flashlight one end is provided with plug, the other end is provided with optically focused head, the sidewall of flashlight is provided with switch, flashlight inside is provided with charging circuit, comparison circuit, reference voltage and battery, the input of transforming circuit is connected with plug, the cathode output end of transforming circuit is connected with the output cathode of the output common port of relay and optocoupler, the output normal-closed end of relay is connected with the electrode input end of charging circuit, the output Chang Kaiduan of relay is connected with an input of relay and optocoupler output negative pole, the cathode output end of charging circuit and the positive pole of battery, the electrode input end of comparison circuit connects, the negative input of comparison circuit is connected with reference voltage, the output of comparison circuit is connected with the electrode input end of optocoupler, another input of relay, the cathode output end of transforming circuit, the negative input of charging circuit, the cathode output end of charging circuit, the negative pole of battery and the negative input ground connection of optocoupler, the bulb of optically focused head is connected with battery by switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346485.XU CN204729938U (en) | 2015-05-26 | 2015-05-26 | A kind of chargeable flashlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346485.XU CN204729938U (en) | 2015-05-26 | 2015-05-26 | A kind of chargeable flashlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729938U true CN204729938U (en) | 2015-10-28 |
Family
ID=54388291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520346485.XU Expired - Fee Related CN204729938U (en) | 2015-05-26 | 2015-05-26 | A kind of chargeable flashlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204729938U (en) |
-
2015
- 2015-05-26 CN CN201520346485.XU patent/CN204729938U/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: 20151028 Termination date: 20160526 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |