CN201487685U - LED Christmas string light with parallel-connection light-emitting unit - Google Patents

Abstract

The utility model relates to an LED Christmas string light with parallel-connection light-emitting units, comprising a plug, an extending socket and a string light, wherein the plug outputs low DC voltage; the string light is connected between the plug and the extending socket and is formed by connecting a plurality of light-emitting units in parallel; each light-emitting unit is provided with an LED Christmas bulb and a resistor connected in series with the LED Christmas bulb, thus after one light-emitting unit is broken down to cause an open circuit, other light-emitting units can still obtain working voltage to normally maintain light-emitting operation due to parallel connection; if a light-emitting diode in the light-emitting unit is broken down to cause a short circuit, the resistor connected in series with the broken light-emitting diode can still avoid generating the short circuit in the string light so as to ensure that the other light-emitting units can not be influenced, and normal operation is also maintained.

Description

The LED Christmans light string group of tool luminescence unit in parallel

Technical field

The utility model relates to the Christmans light string group, refers to a kind of LED Christmans light string group that luminescence unit is connected in parallel especially.

Background technology

As Fig. 4, shown in Figure 5, traditional lamp string includes a plug 50, a prolong socket 52 and is connected in series in plug 50 and a plurality of light emitting diodes (LED) 54 of socket 52 centres.Described plug 50 has two conducting strips 501, in order to connect an AC power 60.Described prolong socket 52 is formed with two jacks, connects the plug of next LED lamp string in order to correspondence.Yet, when any one light emitting diode 54 wherein can't normal operation and when causing opening a way, remaining light emitting diode 54 will be affected and can't light to produce light.Therefore, the overall lamp string just can't normally be lighted smoothly, unless the light emitting diode 54 of this fault is replaced by the normal light emitting diode 54 that can work.

Summary of the invention

Because the shortcoming of aforementioned prior art, the purpose of this utility model is the LED Christmans light string group that is to provide a kind of tool luminescence unit in parallel, when any one luminescence unit burns, can guarantee that remaining luminescence unit still keeps normal luminous operation.

For reaching aforementioned purpose, the LED Christmans light string group of the tool luminescence unit in parallel that the utility model is designed includes:

One connects alternating voltage and is converted into the plug of low dc voltage, and described plug is connected with an extension lead, a direct current voltage output line and an earth connection, and wherein said extension lead and DC voltage output line are responsible for transmitting low dc voltage;

One prolong socket connects described extension lead and earth connection;

One lamp string is connected between described plug and the prolong socket, includes the luminescence unit of a plurality of parallel connections, and each luminescence unit has a LED Christmas bulb and and connects with described LED Christmas bulb with the resistance that limits electric current and avoid short circuit to take place.

Described each LED Christmas bulb includes:

One lamp socket is connected with in order to the first couple who transmits low dc voltage and transmits lead and transmit lead in order to the second couple who connects described earth connection;

The one lamp base of a fruit is installed in described lamp socket inside;

One light emitting diode has two branch connecting pins, and described light emitting diode is installed in described lamp base of a fruit inside, and described two branch connecting pins run through the lamp base of a fruit and extend to lamp base of a fruit outside to transmit lead and second pair of transmission lead formation electric connection with described first pair respectively.

After the utility model utilization aforementioned techniques means are implemented, because all luminescence units all are to be connected in parallel between DC voltage output line and the earth connection, therefore after any one luminescence unit fault formed open circuit, remaining luminescence unit still can obtain operating voltage normally to keep luminous running; When if the light emitting diode fault in the luminescence unit forms short circuit, the resistance of connecting with this fault light emitting diode still can avoid directly forming between DC voltage output line and the earth connection short circuit, therefore remaining luminescence unit is promptly unaffected, also is to keep normal operation.

Description of drawings

In conjunction with following embodiment and accompanying drawing specific embodiment of the utility model is further described, wherein:

Fig. 1 is an equivalent circuit diagram of the present utility model.

Fig. 2 is a stereo appearance figure of the present utility model.

Fig. 3 is the three-dimensional exploded view of the Christmas bulb in the utility model.

Fig. 4 is the stereo appearance figure of prior art of the present utility model.

Fig. 5 is the equivalent circuit diagram of prior art of the present utility model.

The specific embodiment

As shown in Figures 1 and 2, the utility model is the LED Christmans light string group of a kind of tool luminescence unit in parallel, includes a lamp string 10, a plug 20 and a prolong socket 30.

Plug 20 has two conducting strips 21, and in order to connect AC power, plug 20 inside are provided with one and exchange DC converting circuit, the alternating voltage that receives can be converted to low dc voltage, and this low dc voltage can be lighted luminous in order to drive described lamp string 10.Plug 20 is connected with an extension lead 22, a direct current voltage output lead 23 and an earth connection 24.Extension lead 22 is connected to prolong socket 30 with the transmission low dc voltage.DC voltage output lead 23 is connected to lamp string 10, and the transmission low dc voltage is to lamp string 10.Earth connection 24 is connected between plug 20 and the prolong socket 30.

Lamp string 10 includes at DC voltage output lead 23 and earth connection 24 and is a plurality of luminescence units 11 that are connected in parallel.Each luminescence unit 11 includes the resistance 111 of a LED Christmas bulb 110 and a series LED Christmas bulb 110.Resistance 111 can limit the electric current that flows through LED Christmas bulb 110, burns LED Christmas bulb 110 to avoid excessive electric current.In addition, when LED Christmas bulb 110 itself breaks down the generation short circuit, the resistance 111 of this fault of contacting LED Christmas bulb 110 can prevent to form direct short-circuit between DC voltage output lead 23 and earth connection 24, guarantees that other luminescence unit 11 in the lamp string 10 still can be lighted by driven.

As shown in Figure 3, each LED Christmas bulb 110 includes a lamp socket 1101, two pairs and transmits lead A, A ' and B, and B ', a lamp base of a fruit 1104 and have the light emitting diode 1105 of two branch connecting pins.

When this LED Christmas bulb 110 of assembling, at first light emitting diode 1105 is packed into, and two branch connecting pins of light emitting diode 1105 system runs through the lamp base of a fruit 1104 and is protruding to the outside in these lamp base of a fruit 1104 inside, this lamp base of a fruit 1104 refills is located at lamp socket 1104 inside.Two branch connecting pins of light emitting diode 1105 can contact with two conducting strips of lamp socket 1104 inside respectively, and two conducting strips are to connect two pairs respectively to transmit lead A, A ' and B, B '.

The first couple of LED Christmas bulb 110 transmits lead A, A ' provides the effect that voltage transmits, wherein lead A is connected to the DC voltage output lead 23 that extended out by plug 11 or the lead A ' of previous LED Christmas bulb 110, and an other lead A ' is connected to the earth connection 24 or the lead A of next LED Christmas bulb 110.And second couple of transmission lead B, B ' then provides the ground connection effect.

The utility model is by the above-mentioned mode that is connected in parallel, even one of them emitting bulb 110 fault is burnt, other emitting bulb 110 is still and can be affected and can keeps normal luminous operation.

Claims (2)

1. the LED Christmans light string group of tool luminescence unit in parallel is characterized in that LED Christmans light string group includes:

One connects alternating voltage and is converted into the plug of low dc voltage, and described plug is connected with an extension lead, a direct current voltage output line and an earth connection, and wherein said extension lead and DC voltage output line are responsible for transmitting low dc voltage;

One prolong socket connects described extension lead and earth connection;

One lamp string is connected between described plug and the prolong socket, includes the luminescence unit of a plurality of parallel connections, and each luminescence unit has a LED Christmas bulb and and connects with described LED Christmas bulb with the resistance that limits electric current and avoid short circuit to take place.

2. the LED Christmans light string group of tool as claimed in claim 1 luminescence unit in parallel is characterized in that wherein each LED Christmas bulb includes:

One lamp socket is connected with in order to the first couple who transmits low dc voltage and transmits lead and transmit lead in order to the second couple who connects described earth connection;

The one lamp base of a fruit is installed in described lamp socket inside;

One light emitting diode has two branch connecting pins, and described light emitting diode is installed in described lamp base of a fruit inside, and described two branch connecting pins run through the lamp base of a fruit and extend to lamp base of a fruit outside to transmit lead and second pair of transmission lead formation electric connection with described first pair respectively.

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