CN201935013U - A kind of LED light bulb - Google Patents

Abstract

The utility model relates to LED lamp technology, and in particular to an LED bulb, which includes a lamp holder, a lampshade, and a power source located in the lamp holder, a heat dissipation metal shell is clamped between the lamp holder and the lampshade, the top of the heat dissipation metal shell is located in the lampshade, and a heat dissipation substrate is clamped and fixed to the top of the heat dissipation metal shell, and an LED light-emitting column is plugged and fixed to the heat dissipation substrate, and the LED light-emitting column includes two PCB substrates, the fronts of the two PCB substrates are both packaged with LED chips, the LED chip is electrically connected to the PCB substrate, the PCB substrate is electrically connected to the power source, the backs of the two PCB substrates are closely fixed to each other, and a heat dissipation metal sheet is sandwiched between the backs of the two PCB substrates. The utility model can realize radial light emission, and has a large light coverage range and fast heat dissipation speed.

Description

A kind of LED light bulb

technical field

The utility model relates to the technology of LED lamps, in particular to an LED light bulb.

Background technique

Because LED (Light Emitting Diode, light-emitting diode) has the characteristics of long service life, low energy consumption, and remarkable energy saving, LED has been widely used as a light source in daily life, such as cup lights, spotlights, car lights, LED Light bulbs and other LED lighting fixtures.

At present, LED light bulbs generally include a lamp cap, a lampshade installed on the top of the lamp cap, and a power supply located in the lamp cap. An LED light-emitting column is arranged in the lampshade, and the LED light-emitting column is electrically connected to the power supply in the lamp cap. The light can be irradiated through the lampshade to achieve the purpose of lighting or decoration. However, most of the LED light-emitting columns of LED bulbs in the prior art are directly welded and packaged LEDs on the PCB (printed circuit board) substrate, and the LEDs are all located on one side of the PCB substrate, resulting in the LED light-emitting columns only emitting light in one direction. The light coverage is small (maximum 180 degrees), and the heat generated by the LED is only guided and dissipated through the PCB substrate, the heat dissipation speed is slow, and the heat dissipation effect is not good.

Contents of the invention

The purpose of the utility model is to provide an LED light bulb capable of emitting light in a radial direction and having a fast heat dissipation speed in view of the deficiencies of the prior art.

The purpose of this utility model is achieved through the following technical measures: an LED light bulb, which includes a lamp cap, a lampshade, and a power supply located in the lamp cap. And the top of the heat-dissipating metal shell is clamped and fixed with a heat-dissipating substrate, and the heat-dissipating substrate is plugged and fixed with an LED light-emitting column. The LED light-emitting column includes two PCB substrates, and LED chips are packaged on the fronts of the two PCB substrates. The substrates are electrically connected, the PCB substrates are electrically connected to the power supply, the backs of the two PCB substrates are closely attached to each other and fixed, and a heat dissipation metal sheet is interposed between the backs of the two PCB substrates.

The heat dissipation metal sheet is copper sheet.

The area of the side of the heat dissipation metal sheet is larger than the area of the back of the PCB substrate.

The heights of the LED chips on the two PCB substrates are equal.

There are two or more LED light columns.

The bottom of the heat-dissipating metal shell is clamped and fixed with an insulating sleeve.

Both the heat dissipation substrate and the PCB substrate are heat dissipation aluminum substrates, and the bottom of the PCB substrate is provided with a socket, wherein the two PCB substrates and the heat dissipation metal sheet of the LED luminous column are fixed by rivets.

The PCB substrate is provided with a blind hole for packaging the LED chip, and the LED chip is fixed in the blind hole through resin encapsulation, and the inner edge of the blind hole is a slope inclined outward.

The lamp cap is a spiral lamp cap.

The lampshade is a candle-shaped lampshade or a spherical lampshade.

The beneficial effect of the utility model lies in that the utility model includes a lamp cap, a lampshade, and a power supply located in the lamp cap. A heat dissipation metal shell is clamped between the lamp cap and the lampshade. The heat dissipation substrate is connected and fixed, and the heat dissipation substrate is plugged and fixed with an LED light-emitting column. The LED light-emitting column includes two PCB substrates. The fronts of the two PCB substrates are packaged with LED chips. The LED chip is electrically connected to the PCB substrate. Connection, the backs of the two PCB substrates are closely attached to each other and fixed, and a heat dissipation metal sheet is sandwiched between the backs of the two PCB substrates. Since both sides of the LED light-emitting column of the utility model have LED chips, when the LED chip emits light, it can realize radial light emission, and the light coverage is large (up to 360 degrees); moreover, the heat-dissipating metal sheet of the LED light-emitting column can The heat accumulated on the PCB substrate is quickly transferred to the heat dissipation substrate, and then quickly dissipated by the heat dissipation substrate through the heat dissipation metal shell. Therefore, the utility model has the characteristics of large light coverage and fast heat dissipation.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of an LED light bulb of the present invention.

Fig. 2 is an exploded schematic diagram of Embodiment 1 of an LED light bulb of the present invention.

Fig. 3 is a schematic structural view of an LED bulb embodiment 1 of the present invention with the lampshade hidden.

Fig. 4 is a schematic structural view of an LED light-emitting column in Embodiment 1 of an LED light bulb of the present invention.

Fig. 5 is a side view of the LED luminous column of Embodiment 1 of an LED light bulb of the present invention.

Fig. 6 is an exploded schematic view of the LED luminous column of Embodiment 1 of an LED light bulb of the present invention.

Fig. 7 is a schematic diagram of the light direction of the packaged LED chip of the LED bulb embodiment 1 of the present invention.

FIG. 8 is a schematic diagram of the light direction of a traditionally packaged LED chip.

In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7 include:

1——lamp holder 2——lampshade

3——Power supply 4——Heat dissipation metal shell

5——Heat Dissipation Substrate 6——LED Lighting Column

61——PCB substrate 611——socket part

612——Rivet 613——Blind hole

614——inside edge 62——LED chip

63——radiating metal sheet 7——insulation sleeve.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Example 1

A LED light bulb of the present utility model, as shown in Figures 1 to 6, includes a lamp base 1, a lampshade 2, and a power supply 3 located in the lamp base 1. The power supply 3 is electrically connected to the lamp base 1 so that the power supply 3 can be externally connected to Alternating current, between the lamp cap 1 and the lampshade 2 is a heat dissipation metal shell 4, the top of the heat dissipation metal shell 4 is located in the lampshade 2, and the top of the heat dissipation metal shell 4 is clamped and fixed with a heat dissipation substrate 5, so that the heat dissipation substrate 5 can dissipate heat Passed to the heat-dissipating metal shell 4, the heat-dissipating substrate 5 is plugged and fixed with an LED light-emitting column 6, and the LED light-emitting column 6 includes two PCB substrates 61, and the fronts of the two PCB substrates 61 are packaged with LED chips 62, that is, the LED chips 62 are directly packaged On the PCB substrate 61, in order to reduce the volume and weight of the LED luminous column 6, the LED chip 62 is electrically connected to the PCB substrate 61, and the PCB substrate 61 is electrically connected to the power supply 3, so that the power supply 3 can convert alternating current into direct current, and pass through the PCB The substrate 61 supplies power to the LED chip 62, and the backs of the two PCB substrates 61 are closely attached to each other and fixed, so that both sides of the LED light-emitting column 6 have LED chips 62. When the LED chip 62 emits light, radial light can be achieved, and the light coverage Large range (up to 360 degrees).

A heat dissipation metal sheet 63 is sandwiched between the backs of the two PCB substrates 61 of the LED luminous column 6. When the LED chip 62 works and emits light, a large amount of heat will be generated and gathered on the PCB substrate 61. Therefore, the heat dissipation metal sheet 63 can The heat accumulated on the PCB substrate 61 is transferred to the heat dissipation substrate 5 , and then quickly dissipated by the heat dissipation substrate 5 through the heat dissipation metal shell 4 . In this embodiment, it is preferable that the heat dissipation metal sheet 63 is a copper sheet, because the copper sheet has advantages such as high thermal conductivity, and can quickly conduct away the heat accumulated on the PCB substrate 61 , that is, the heat dissipation speed is relatively fast. Of course, the heat dissipation metal sheet 63 can also be made of other heat dissipation materials, as long as it has advantages such as high thermal conductivity.

The area of the side of the heat dissipation metal sheet 63 is larger than the area of the back of the PCB substrate 61 , that is, the periphery of the heat dissipation metal sheet 63 slightly protrudes from the PCB substrate 61 to increase the heat dissipation and heat conduction area.

The heights of the LED chips 62 of the two PCB substrates 61 of the LED luminous column 6 are equal, so that the LED chips 62 on both sides of the LED luminous column 6 can maintain the same height to emit light and form a point light source; wherein, the LED luminous column 6 is two or two More than one, such as the three selected in this embodiment, and the LED chip 62 is a high-power LED chip 62 of 1 to 10W, so that the LED luminous column 6 has sufficient brightness when emitting light, so that the LED luminous column 6 can form a lamp similar to the traditional one. The "firework" effect of the tungsten filament lamp, that is, the luminous effect of the tungsten filament lamp is formed so that the utility model can replace the traditional tungsten filament lamp to achieve the purpose of lighting or decoration. Certainly, because the utility model adopts the LED chip 62 with power saving and long service life as the light source, compared with the traditional tungsten filament lamp, the utility model has the advantages of power saving and long service life.

The bottom of the heat dissipation metal shell 4 is clamped and fixed with an insulating sleeve 7 to insulate the heat dissipation metal shell 4 from the power supply 3 .

The heat dissipation substrate 5 and the PCB substrate 61 are both heat dissipation aluminum substrates, which have a good heat dissipation effect; the bottom of the PCB substrate 61 of the LED luminous column 6 is provided with a plug-in part 611, so that the LED luminous column 6 can be plugged and fixed on the heat dissipation on the substrate 5.

The two PCB substrates 61 and the heat dissipation metal sheet 63 of the LED luminous column 6 are fixed by rivets 612. More specifically, the rivets 612 pass through the two PCB substrates 61 and the heat dissipation metal sheet 63, thereby connecting the two PCB substrates 61 and the heat dissipation The metal sheet 63 is locked and fixed, so that the heat dissipation metal sheet 63 is closely attached to the backs of the two PCB substrates 61, thereby increasing the heat dissipation area, and the utility model can increase the heat dissipation speed by 8-10%. Of course, the two PCB substrates 61 of the LED luminous column 6 can also be fixed in other ways, such as fastening and sticking, as long as the fixing effect is good.

As shown in Figure 7, the PCB substrate 61 is cut horizontally, wherein, the PCB substrate 61 of the LED luminous column 6 of the present invention is provided with a blind hole 613 for packaging the LED chip 62, and the LED chip 62 is fixed in the blind hole 613 by resin encapsulation. inside, and the inner edge 614 of the blind hole 613 is an outwardly inclined slope, and the inner edge 614 can reflect the light emitted from the side of the LED chip 62, thereby improving the brightness of the LED chip 62; however, as shown in Figure 8 , the inner edge of the blind hole of the traditional PCB substrate used to package the LED chip is vertically arranged, so the light emitted from the side of the LED chip cannot be reflected; The light emitted from the side of the chip 62 is reflected, and according to tests, the brightness of the LED chip 62 can be increased by 2-5%.

The lamp holder 1 is a spiral lamp holder 1, so that the utility model can be fixedly connected with the traditional lamp socket. Certainly, the lamp holder 1 of the utility model can be lamp holders of models such as E12, E14, E17, E26, E27, B22.

The lampshade 2 is a candle-shaped lampshade, so that the light emitted by the LED chip 62 can be irradiated through the lampshade 2 to achieve the purpose of lighting or decoration. Of course, the candleshade may be selected as a glass candleshade or a plastic candleshade according to the actual application environment, or may be a transparent candleshade or a translucent candleshade.

Example 2

Embodiment 2 of an LED light bulb of the present utility model. The difference between this embodiment and Embodiment 1 is that the lampshade 2 is a spherical lampshade, and the spherical lampshade can be selected as a glass spherical lampshade or a plastic spherical lampshade according to the actual application environment. , can also be a transparent spherical lampshade or a translucent spherical lampshade. Of course, the lampshade of the present utility model can also be in other shapes, not limited to candle shape or spherical shape. Other structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (10)

1. An LED light bulb, which includes a lamp cap, a lampshade, and a power supply located in the lamp cap. A heat-dissipating metal shell is clamped between the lamp cap and the lampshade. The top of the heat-dissipating metal shell is located in the lampshade, and the top of the heat-dissipating metal shell is clipped and fixed. There is a heat dissipation substrate, and the heat dissipation substrate is plugged and fixed with an LED luminous column, which is characterized in that: the LED luminous column includes two PCB substrates, the fronts of the two PCB substrates are packaged with LED chips, the LED chips are electrically connected to the PCB substrate, and the PCB The substrate is electrically connected to the power supply, the backs of the two PCB substrates are closely attached to each other and fixed, and a heat dissipation metal sheet is sandwiched between the backs of the two PCB substrates. 2. The LED light bulb according to claim 1, wherein the heat dissipation metal sheet is a copper sheet. 3. The LED light bulb according to claim 2, characterized in that: the area of the side of the heat dissipation metal sheet is larger than the area of the back of the PCB substrate. 4. The LED light bulb according to claim 2, wherein the LED chips of the two PCB substrates have the same height. 5. The LED light bulb according to claim 4, characterized in that there are two or more LED light-emitting columns. 6. The LED light bulb according to claim 5, characterized in that: an insulating sleeve is clipped and fixed in the bottom of the heat dissipation metal shell. 7. The LED light bulb according to claim 5, characterized in that: the heat dissipation substrate and the PCB substrate are both heat dissipation aluminum substrates, and the bottom of the PCB substrate is provided with a plug-in part, wherein the two PCB substrates of the LED luminous column are connected to the The cooling metal sheet is fixed by rivets. 8. The LED light bulb according to claim 1, characterized in that: the PCB substrate is provided with a blind hole for packaging the LED chip, the LED chip is fixed in the blind hole through resin packaging, and the inner edge of the blind hole is outward Inclined slope. 9. The LED light bulb according to claim 1, wherein the lamp cap is a spiral lamp cap. 10. The LED light bulb according to any one of claims 1 to 9, wherein the lampshade is a candle-shaped lampshade or a spherical lampshade.

Images