CN201057374Y

CN201057374Y - Rechargeable flashlight

Info

Publication number: CN201057374Y
Application number: CNU200720079299XU
Authority: CN
Inventors: 田俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-24
Filing date: 2007-04-24
Publication date: 2008-05-07
Anticipated expiration: 2017-04-24

Abstract

The utility model relates to a chargeable flashlight which solves the problems of unsafe charging and short service life by using lead-acid battery as power supply. An electrode of a power supply socket is connected with an input interface of a rectification circuit (2) through a current limited circuit (1) of a capacitor and the other input interface of the rectification circuit (2) is connected with the other electrode of the power supply socket; a lead-acid battery (5) and a lamp (6) are in parallel connected with an output interface of the rectification circuit (2); an input interface of the lead-acid battery (5) is connected in parallel with a voltage regulator circuit (3) which consists of an inductor L and a voltage regulator diode DW in series.

Description

The charge type flashlight

Technical field:

The utility model with use lead-acid accumulator relevant as the charge type flashlight of power supply.

Background technology:

Existing charge type flashlight adopts capacitor current-limiting type constant-current charge circuit to give lead acid battery charge, though circuit structure is simple, with low cost, uses dangerous.Its reason is that the DC voltage of charging circuit output approximates AC-input voltage, and fluctuates with the fluctuation of AC-input voltage.After the DC voltage of input surpasses lead-acid accumulator set upper limit voltage, battery will produce a large amount of hydrogen.The safety cap that excessive hydrogen and acid solution will be washed battery open releases, and makes battery malfunction and corrodes peripheral devices, and the service life of charge type flashlight is very short.

The utility model content:

The purpose of this utility model provides a kind of simple in structure, and is with low cost, safe in utilization, the charge type flashlight of long service life.

The utility model is achieved in that

The utility model charge type flashlight, the capacitor current-limiting circuit 1 of one utmost point of the ac power plug on the cylindrical shell in cylindrical shell connects an input of rectification circuit 2, another input of rectification circuit 2 is connected with another utmost point of ac power plug, the output of rectification circuit 2 is parallel with lead-acid accumulator 5 and illuminating lamp 6, the input of lead-acid accumulator 5 is parallel with mu balanced circuit 3, and mu balanced circuit 3 is made up of inductance L and Zener diode DW polyphone.

Filter capacitor C is arranged ₂In parallel with mu balanced circuit 3.

One end of mu balanced circuit 3 is connected with an input of battery 5 through the non-return circuit 4 of diode, and rectification circuit 2 is diode D ₁-D ₄The full-wave rectifying circuit of forming.

Capacitor current-limiting circuit 1 is by the capacitor C of parallel connection ₁And resistance R ₁Form, illuminating lamp 6 is by the resistance R of series connection ₃Form with LED, charging indicator light D is arranged ₅And resistance R ₂Be connected in series with between the input and output of full-wave rectifying circuit 2.

The utility model is parallel with the mu balanced circuit of inductance L and Zener diode DW composition at the input of lead-acid accumulator, realized charging safety with extremely low cost, be provided with the non-return circuit of diode between mu balanced circuit and the battery input, can stop battery to discharge when not charging to charging circuit, cooperate capacitance current-limiting and full-wave rectifying circuit again, required specification requirement in the time of satisfying lead acid battery charge, can not overcharge, there are not a large amount of hydrogen generations and acid solution to release, increased the service life of flashlight greatly, with low cost, safe in utilization.

Description of drawings:

Fig. 1 is a block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

The specific embodiment:

See Fig. 2, C ₁, R ₁Form the capacitance current-limiting circuit, D ₁-D ₄Be typical diode full-wave rectifying circuit, R ₂, D ₅Be the charging beacon lamp, C ₂, L, DW form direct current regulation circuit, C ₂Be filter condenser (for saving cost, also can not wanting), L flows inductance late, and DW is a Zener diode, and the parameter value that changes L, DW can satisfy required voltage of voltage regulation and electric current, D ₂Be non-return diode, electric current can be unblocked when lead acid battery charge, can stop lead-acid accumulator to leak electricity to charging circuit when not charging, and E is a lead-acid accumulator, LED, R ₃Be the flashlight light source, be subjected to the control of K switch.

Claims

1. charge type flashlight, the capacitor current-limiting circuit (1) of one utmost point of the ac power plug on the cylindrical shell in cylindrical shell connects an input of rectification circuit (2), another input of rectification circuit (2) is connected with another utmost point of attaching plug, the output of rectification circuit (2) is parallel with lead-acid accumulator (5) and illuminating lamp (6), the input that it is characterized in that lead-acid accumulator (5) is parallel with mu balanced circuit (3), and mu balanced circuit (3) is made up of inductance L and Zener diode DW polyphone.

2. charge type flashlight according to claim 1 is characterized in that having filter capacitor C ₂In parallel with mu balanced circuit (3).

3. charge type flashlight according to claim 1 is characterized in that an end of mu balanced circuit (3) is connected through the input of the non-return circuit of diode (4) with battery (5), and rectification circuit (2) is diode D ₁-D ₄The full-wave rectifying circuit of forming.

4. charge type flashlight according to claim 3 is characterized in that the capacitor C of capacitor current-limiting circuit (1) by parallel connection ₁And resistance R ₁Form, illuminating lamp (6) is by the resistance R of series connection ₃Form with LED, charging indicator light D is arranged ₅And resistance R ₂Be connected in series with between the input and output of full-wave rectifying circuit (2).