CN203176875U - LED lamp bulb - Google Patents

Abstract

The utility model relates to an LED (light-emitting diode) lamp bulb. The LED lamp bulb comprises a lamp housing and a lamp cap which are connected mutually into a whole, wherein a PCB (printed circuit board) is mounted in an inner cavity defined by the lamp housing and the lamp cap; a driving circuit capable of allowing an external power source to be converted into supply power for an illuminant is mounted on the PCB; the PCB consists of a vertically arranged first PCB and a horizontally arranged second PCB which are connected mutually; the driving circuit is positioned on the first PCB; and the illuminant is mounted on the second PCB, and formed by arraying three SMD (surface mounted device) LEDs. With the adoption of the three SMD LEDs, the brightness of the lamp bulb is improved greatly in comparison with the existing filament lamp or single LED lamp bulb, and a use requirement of a night lamp can be met sufficiently; the PCB is divided into two parts, so that an overall structure is more compact, and the size is smaller; and the illuminant and the driving circuit are mounted separately, so that heat dissipation is facilitated better. Therefore, the LED lamp bulb is simple in structure, easy to manufacture, energy-saving and environment-friendly, and has the advantage of good heat dissipation performance.

Description

A kind of LED light bulb

technical field

The utility model relates to a light bulb, in particular to a low-power LED light bulb.

Background technique

Incandescent bulbs are a relatively common type of lighting bulbs, but they have been gradually replaced by LED bulbs due to their shortcomings such as low electro-optical conversion efficiency, high heat generation, and short service life. Although LED light bulbs have the advantages of small size, low energy consumption, and long service life, the brightness of a single LED is not high. In order to obtain higher brightness, multiple LEDs are often assembled into one light source, which is made of this light source. Heat dissipation becomes a serious problem because the brightness of LED bulbs at high temperatures will be seriously attenuated, which will affect its service life. For this reason, a large-volume radiator is often added to this type of bulb, which makes the bulb very large. Now there are also light-emitting diodes (SMD LEDs) that are used as light bulbs, such as "LED light bulbs" with the Chinese patent authorization announcement number CN201416792Y, which may also have the above-mentioned defects.

At present, there are also light bulbs made of a single LED on the market. Although the heat is less, the lamps made of this light bulb have very low brightness, so they are usually used as night lights. But even as a night light, its brightness is still not very ideal.

Utility model content

The technical problem to be solved by the utility model is to provide a LED light bulb with good brightness and small volume aiming at the current state of the prior art.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: an LED light bulb, including a lamp housing and a lamp cap that are connected to each other as a whole, and a PCB board is installed in the inner cavity surrounded by the lamp housing and the lamp cap. A drive circuit that converts the external power supply into a power supply for the illuminant is installed on the PCB, and it is characterized in that: the PCB is composed of a first PCB that is connected upright and a second PCB that is horizontally arranged. The driving circuit is located on the first PCB; the luminous body is installed on the second PCB and is formed by three SMD LEDs.

As a preferred solution of the present invention, the three patch LEDs are respectively arranged at the top of the triangle to improve the lighting effect.

As a further improvement of the present utility model, the upper end of the first PCB gradually becomes smaller from bottom to top to form a constriction at the connection with the second PCB, which is beneficial to heat dissipation.

In the above improved solution, preferably, the driving circuit is mounted on two opposite sides of the first PCB board, so as to further improve heat dissipation performance.

Compared with the prior art, the utility model has the advantages that: due to the use of three SMD light-emitting diodes, the brightness of the bulb is greatly improved compared with the existing incandescent lamp or a single LED bulb, which is enough to meet the needs of night lights. The application requirements, and the PCB board is divided into two pieces, so that the overall structure is more compact and the volume is smaller. At the same time, since the luminous body and the driving circuit are installed separately, it is more conducive to heat dissipation. Therefore, the utility model has the advantages of simple structure, easy manufacture, energy saving and environmental protection, and good heat dissipation performance.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the utility model embodiment;

Fig. 2 is a three-dimensional sectional view of Fig. 1;

Fig. 3 is a three-dimensional exploded view of Fig. 1;

FIG. 4 is an exploded view of the first PCB board, the second PCB board, the patch LED and the driving circuit in FIG. 3 .

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 4, the LED light bulb includes a lamp housing 1 and a lamp base 2 that are connected to each other as a whole, wherein the lamp housing 1 is made of a light-transmitting material, and the lamp base 2 can adopt a bayonet joint or a threaded joint of traditional technology. A PCB board is installed in the inner cavity surrounded by the lamp housing 1 and the lamp holder 2, and a drive circuit that converts the external power supply into power supply for the illuminant is installed on the PCB board. In this embodiment, the PCB board is composed of interconnected The first PCB board 3 arranged upright and the second PCB board 4 arranged horizontally are composed, the driving circuit is located on the first PCB board 3, the luminous body is installed on the second PCB board 4, and the luminous body is composed of three patch LEDs 5 (SMD LED) arranged.

In order to be more conducive to heat dissipation, the upper end of the first PCB 3 gradually becomes smaller from bottom to top to form a constricted portion at the connection with the second PCB 4 . The second PCB board 4 is made into a disc-shaped structure.

In order to have a better lighting effect, the above three patch LEDs 5 are respectively arranged at the top of the triangle. The above-mentioned drive circuit is a conventional circuit, wherein four diodes 6 for rectification are installed on one side of the first PCB 3 , and two resistors 7 for current limiting are installed on the other side of the first PCB 4 .

After adopting this embodiment, the bulb is small in size, good in luminous brightness, easy to dissipate heat, and has a long service life.

Claims (4)

1. An LED light bulb, comprising a lamp housing (1) and a lamp cap (2) that are connected to each other as one, and a PCB board is installed in the cavity surrounded by the lamp housing (1) and the lamp cap (2), the described A drive circuit that converts the external power supply into a power supply for the illuminant is installed on the PCB, and it is characterized in that: the PCB is composed of a first PCB (3) connected upright and a second PCB (3) arranged horizontally. 4) composition, the drive circuit is located on the first PCB board (3); the luminous body is installed on the second PCB board (4), and consists of three patch light emitting diodes (5) arranged. 2. The LED light bulb according to claim 1, characterized in that the three SMD light emitting diodes (5) are respectively arranged at the top of a triangle. 3. The LED light bulb according to claim 1 or 2, characterized in that: the upper end of the first PCB board (3) gradually becomes smaller from bottom to top and is connected to the second PCB board (4) form a constriction. 4. The LED bulb according to claim 3, wherein the driving circuit is mounted on two opposite sides of the first PCB.

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