CN207099385U - A kind of LED night lamp - Google Patents

Abstract

The utility model discloses a kind of LED night lamp, the mini light night of the structure is provided with two light emitting sources, respectively LED string and LED light group, in the presence of civil power, LED string is lit, the mini light night of the structure can be charged using charge-discharge circuit to rechargeable battery while providing base lighting for environment, when city is electrically disconnected, rechargeable battery is discharged LED light group by charge-discharge circuit, lightening LED lamp group, emergent illumination is provided to environment, avoided after city is electrically disconnected, the awkward situation that mini light night can not illuminate.

Description

A kind of LED night lamp

Technical field

Field of illumination lamp technology is the utility model is related to, more particularly to a kind of LED night lamp.

Background technology

Mini light night light is soft, in boundless and indistinct dark, plays a part of guiding illumination, existing mini light night is all fixed Or can not charge, in-convenience in use.And emergent illumination can not be provided when civil power powers off.

Applicant's accumulation mini light night research and development for many years and manufacturing experience, a kind of electricity is developed for the defects of existing mini light night Line structure simply has the LED night lamp of charge function.

Utility model content

The utility model purpose is to provide the LED night lamp that a kind of circuit structure simply has charge function, overcomes existing Have LED night lamp can not charge and can not city it is electrically disconnected after provide emergency lighting the defects of.

The solution that the utility model solves its technical problem is：A kind of LED night lamp, including：LED string, LED Group, capacitance-resistance voltage reduction circuit, current rectifying and wave filtering circuit, charge-discharge circuit, rechargeable battery, the input of the capacitance-resistance voltage reduction circuit and city Electrical connection, the output end of the capacitance-resistance voltage reduction circuit and the input of current rectifying and wave filtering circuit connect, the current rectifying and wave filtering circuit Output end is connect with charge-discharge circuit, LED series winding respectively, and the charge-discharge circuit is connected with the LED light group, is electrically connected in city When, the output voltage of the current rectifying and wave filtering circuit is charged by the charge-discharge circuit to the rechargeable battery, in civil power When disconnection, the rechargeable battery is discharged LED light group by the charge-discharge circuit.

Further, the charge-discharge circuit includes：First, second, third resistance, first, second triode, described first The output end with the current rectifying and wave filtering circuit, the positive pole of LED string are connected respectively for one end of resistance, the first resistor it is another The emitter stage with first triode, the positive pole of rechargeable battery, one end of 3rd resistor, one end of second resistance connect respectively at end Connect, the negative pole with the LED light group, the negative pole of rechargeable battery are connected the other end of the second resistance respectively, the 3rd electricity The other end of resistance is connected with the base stage of second triode, the emitter stage of second triode and first triode Base stage connects, and the colelctor electrode with second triode, the positive pole of LED light group connect the colelctor electrode of first triode respectively Connect.

Further, first, second triode is BC327-25.

The beneficial effects of the utility model are：The mini light night of the structure is provided with two light emitting sources, respectively LED string and LED light group, in the presence of civil power, LED string is lit, the small night of structure while providing base lighting for environment Lamp can be charged using charge-discharge circuit to rechargeable battery, and when city is electrically disconnected, rechargeable battery passes through discharge and recharge electricity Road is discharged LED light group, lightening LED lamp group, and emergent illumination is provided to environment, is avoided after city is electrically disconnected, mini light night without The awkward situation of method illumination.

Brief description of the drawings

, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model The accompanying drawing to be used is briefly described.Obviously, described accompanying drawing is part of the embodiment of the present utility model, rather than entirely Portion's embodiment, those skilled in the art on the premise of not paying creative work, can also obtain it according to these accompanying drawings His design and accompanying drawing.

Fig. 1 is the circuit module figure of mini light night；

Fig. 2 is the circuit connection diagram of mini light night.

Embodiment

Design, concrete structure and caused technique effect of the present utility model are carried out below with reference to embodiment and accompanying drawing Clearly and completely describe, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment It is part of the embodiment of the present utility model, rather than whole embodiments, based on embodiment of the present utility model, the skill of this area The other embodiment that art personnel are obtained on the premise of not paying creative work, belong to the model of the utility model protection Enclose.In addition, all connection/annexations being previously mentioned in text, not singly refer to component and directly connect, and refer to can be according to specific reality Situation is applied, by adding or reducing couple auxiliary, to form more excellent draw bail.Each technology in the invention is special Sign, can be with combination of interactions on the premise of not conflicting conflict.

Embodiment 1, with reference to figure 1 and Fig. 2, a kind of LED night lamp, including：LED string a4, LED light group a7, resistance-capacitance depressurization Circuit a2, current rectifying and wave filtering circuit a3, charge-discharge circuit a5, rechargeable battery a6, the capacitance-resistance voltage reduction circuit a2 is by the second electric capacity C2 Formed with the 4th resistance R4, the arrangement filter circuit a3 is made up of bridge heap D1, the first electric capacity C1, the charge-discharge circuit a5 by First, second, third resistance R1, R2, R3, first, second triode Q1, Q2 compositions, one end difference of the second electric capacity C2 Be connected with the civil power a1, the 4th resistance R4 one end, the other end of the second electric capacity C2 respectively with the 4th resistance R4 The other end, bridge heap D1 ac input end connection, a DC output end of the bridge heap D1 respectively with LED string a4 just Pole, one end connection of the first electric capacity C1 positive pole, first resistor R1, the other end of the first resistor R1 is respectively with described first One end connection of triode Q1 emitter stage, rechargeable battery a6 positive pole, 3rd resistor R3 one end, second resistance R2, it is described The second resistance R2 other end respectively the negative pole with the LED light group a7, rechargeable battery a6 negative pole, the bridge heap D1 it is another The negative pole connection of DC output end, the first electric capacity C1, the other end of the 3rd resistor R3 and the second triode Q2 Base stage connection, the emitter stage of the second triode Q2 is connected with the base stage of the first triode Q1, the one or three pole The colelctor electrode with the second triode Q2, LED light group a7 positive pole are connected pipe Q1 colelctor electrode respectively, the LED string a4 It is connected by resistance with the negative pole of the rechargeable battery a6.

The operation principle of foregoing circuit structure is：When having civil power, civil power passes through resistance-capacitance circuit a2 and rectifying and wave-filtering Direct current after being depressured after circuit a3, the direct current directly drive LED string a4 and lighted all the way, there is provided basic photograph Bright, another way is charged by first resistor R1 to rechargeable battery a6, and now first, second triode Q1, Q2 is equivalent to being electrically charged Battery a6 short circuits, first, second triode Q1, Q2 cut-off, after civil power removes, rechargeable battery a6 is in the first triode Voltage difference, first, second triode Q1, Q2 conductings, charging electricity are formed between Q1 colelctor electrode and the second triode Q2 base stage Pond a6 discharges LED light group a7, so as to lightening LED lamp group a7, there is provided emergent illumination.

As optimization, the first, second triode Q1, Q2 BC327-25.BC327-25 has very low leakage current, Charge-discharge circuit a5 reliability can be improved using this triode.

Better embodiment of the present utility model is illustrated above, but the invention be not limited to it is described Embodiment, those skilled in the art can also make a variety of equivalent changes on the premise of without prejudice to the utility model spirit Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.

Claims (3)

1. A kind of 1. LED night lamp, it is characterised in that including：LED string, LED light group, capacitance-resistance voltage reduction circuit, rectifying and wave-filtering electricity Road, charge-discharge circuit, rechargeable battery, the input of the capacitance-resistance voltage reduction circuit electrically connect with city, the capacitance-resistance voltage reduction circuit The input of output end and current rectifying and wave filtering circuit connects, the output end of the current rectifying and wave filtering circuit respectively with charge-discharge circuit, LED Lamp string is connected, and the charge-discharge circuit is connected with the LED light group, when electric connection in city, the current rectifying and wave filtering circuit Output voltage is charged by the charge-discharge circuit to the rechargeable battery, and when city is electrically disconnected, the rechargeable battery leads to The charge-discharge circuit is crossed to discharge to LED light group.
2. 2. a kind of LED night lamp according to claim 1, it is characterised in that the charge-discharge circuit includes：Firstth, 2nd, 3rd resistor, first, second triode, one end of the first resistor respectively the output end with the current rectifying and wave filtering circuit, The positive pole connection of LED string, the other end of the first resistor emitter stage with first triode, rechargeable battery respectively Positive pole, one end connection of one end of 3rd resistor, second resistance, the other end of the second resistance respectively with the LED light group Negative pole, rechargeable battery negative pole connection, the other end of the 3rd resistor is connected with the base stage of second triode, described The emitter stage of second triode is connected with the base stage of first triode, the colelctor electrode of first triode respectively with it is described The colelctor electrode of second triode, the positive pole connection of LED light group.
3. 3. a kind of LED night lamp according to claim 2, it is characterised in that first, second triode is BC327- 25。