CN2264975Y - Fluorescent lamp - Google Patents

Abstract

The utility model relates to a fluorescent lamp which comprises a lamp tube, a pair of electrodes, a first leading wire and a second leading wire. The first leading wire and the second leading wire are respectively connected with the electrodes. The utility model is characterized in that the utility model also comprises a third leading wire, wherein, one end of which is hung in the lamp tube, and the other end of which extends out of the inner part of the lamp tube; a starting resistor is connected between the third leading wire and the first leading wire opposite to the third leading wire; a current-limiting resistor is connected in series between the second leading wire and a power supply. The utility model has the characteristics of simple circuit, low working voltage, long service life of the lamp tube, and high brightness.

Description

Fluorescent lamp

A kind of fluorescent lamp relates to gas or yapour discharge lamp, is the improvement to existing fluorescent lamp.

The fluorescent lamp of domestic production at present comprises cold cathode and hot cathode, and its lead-out wire is symmetric form, and promptly two ends are single or the double joint lead-out wire.Announced a kind of Moonlight lamp 91205588.x number as Chinese patent, it by glass bulb, capacitor, place the pair of electrodes at two ends in the glass bulb and be coated on the glass bulb outer surface and the electrode that do not seal is formed.Electrode be not connected in series capacitor between the enclosed-electrode.Yet the general required starting resistor of above-mentioned fluorescent lamp is higher, and cold cathode is fragile, and is prone to the clarinet phenomenon.

The purpose of utility model provides a kind of fluorescent lamp, and it is long that it has the life-span, the characteristics that operating voltage is low.

According to above-mentioned purpose, the utility model is taked such technical scheme: first and second lead-in wires that this fluorescent lamp comprises fluorescent tube, pair of electrodes and joins with electrode respectively, it is characterized in that also including the 3rd lead-in wire, and described the 3rd lead-in wire one end is suspended on fluorescent tube inside, the other end stretches out in fluorescent tube, be connected to starting resistance between the 3rd lead-in wire and first lead-in wire on the other side, be serially connected with current-limiting resistance between second lead-in wire and power supply.

The utility model is owing to introduce the 3rd lead-in wire in fluorescent tube, therefore the 3rd startup effect that gone between, and electrode plays the style of work.Thereby starting resistor reduces, and cold cathode is protected, and the lamp works life-span is long, and it is simple to have a circuit, and operating voltage is low, power consumptive province, the high advantage of relative brightness.

The concrete structure of utility model is provided by following embodiment and accompanying drawing.

The fluorescent lamp structure schematic diagram that accompanying drawing the utility model proposes for foundation.

Below in conjunction with drawings and Examples the fluorescent lamp that foundation the utility model proposes is further described.

As shown in drawings, comprise pair of electrodes (2) according to the fluorescent lamp that the utility model proposes, all leaded linking to each other on each electrode, and lead-in wire stretches out fluorescent tube (3).Electrode preferably adopts the boat-shaped electrode, makes with nickel or aluminium.The internal layer of fluorescent tube is coated white or color phosphor as required, so that send the light of different color.

Also have the 3rd a unsettled lead-in wire (5) in the inside of fluorescent tube, its end is suspended on fluorescent tube inside, and the other end stretches out in fluorescent tube.The 3rd lead-in wire stretches out the outer end of fluorescent tube and is connected to starting resistance R1 between first lead-out wire (4) of comparative electrode with it together.And the 3rd lead-in wire is connected to current-limiting resistance R2 between second lead-in wire (1) and the power supply of the same end of fluorescent tube.

General fluorescent lamp needs a higher driving voltage for can operate as normal, treat that fluorescent tube is normal after, add a ballast held stationary.During fluorescent lamp external voltage described in the utility model, the dead end of resistance R 2, first lead-in wire connect power supply.Resistance formation loop in the 3rd lead-in wire, first lead-in wire, starting resistance R1 and the lamp starts fluorescent tube during startup.In case enter operating state, form electric field between two electrodes, 2 of resistance R play metering function.Guarantee the operate as normal of fluorescent tube.Existing fluorescent tube with double lead is compared, the 3rd startup effect that gone between, and electrode plays the style of work.So starting resistor is low, electrode is protected, the blackout phenomenon reduces, and lamp tube service life improves.With four the lead-in wire fluorescent tubes compare, the internal resistance when startup internal resistance of the present utility model is promptly worked, from starting state enter into the operating state time short, transient current is little.

Claims (2)

1. fluorescent lamp, first and second lead-in wires that comprise fluorescent tube, pair of electrodes and join with electrode respectively, it is characterized in that also including the 3rd lead-in wire, and described the 3rd lead-in wire one end is suspended on fluorescent tube inside, the other end stretches out in fluorescent tube, the 3rd the lead-in wire and with it relative first the lead-in wire between be connected to starting resistance, second the lead-in wire and power supply between be serially connected with current-limiting resistance.

2. fluorescent lamp according to claim 1 is characterized in that the boat-shaped that is shaped as of electrode.

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