CN214790557U - Small-size LED bulb - Google Patents

Abstract

The utility model provides a small-size LED bulb is to the similar maize shape of setting up of LED lamp pearl, plus the improvement that has the bulb of lamp shade. The metal PCB (4) is tightly attached to the heat conduction base plate (2), the inner side surface of the lampshade (1) is tightly attached to the heat conduction base plate (2), heat from the metal PCB (4) is transferred to the heat conduction base plate (2), then the heat is transferred to the lampshade (1) through the heat conduction base plate (2) and is dissipated, and the heat dissipation problem of the LED lamp beads (3) is fundamentally improved. The built-in radiating fins (7) are arranged, the radiating section (72) is inserted into the lamp holder (6), the lamp holder (6) is utilized, the radiating area is increased, and the power supply (particularly the electrolytic capacitor) can be radiated.

Description

Small-size LED bulb

Technical Field

The utility model belongs to the technical field of the LED illumination, in particular to take lamp holder, LED lamp pearl set up the LED bulb of similar maize shape.

Technical Field

Heat transfer and heat dissipation always troubles the LED bulb, and directly influences the service life of the LED bulb. According to G9 small-sized LED bulbs in the market, the LED bulbs are arranged in a shape similar to a corn shape, and the lampshade covers the LED bulbs, so that the heat dissipation performance is low. The problem is solved by increasing the number of the LED lamp beads in the industry, the 2835 lamp beads of 0.5W are actually used as 0.05W, the cost is increased, and the heat dissipation performance is not effectively changed. The power supply heat dissipation of the G9 small-sized LED bulb (particularly the electrolytic capacitor) is more important, but no prior art proposal for the power supply heat dissipation is provided.

Disclosure of Invention

The utility model aims at providing a LED bulb, the heat transfer process fundamental principle of foundation adopts with low costs, and simple structure mode has not only solved this kind of lamp pearl heat dissipation problem, has still solved the heat dissipation of power (especially electrolytic capacitor).

The utility model discloses a LED bulb technical scheme: the LED bulb includes: the LED lamp comprises a lampshade, a heat conduction base plate, LED lamp beads, a metal PCB plate, a power supply plate, a lamp cap, a built-in radiating fin and an electrode connector, wherein the built-in radiating fin comprises a heat absorption section and a heat dissipation section; the heat dissipation section of the built-in radiating fin is inserted into the lamp cap, the heat absorption section is arranged between the metal PCB and the power supply board, and heat absorbed by the heat absorption section of the built-in radiating fin (such as heat generated by a power supply) is conducted to the heat dissipation section and is dissipated from the surface of the lamp cap. The utility model discloses in LED lamp pearl be a SMD lamp pearl (the SMD LED chip of good encapsulation).

The metal PCB is adopted, and the arrangement of the heat conduction base plate is added, so that the internal heat conduction and heat transfer are enhanced, the LED lamp beads not only can actually use lamp beads with the power of 0.5W, the manufacturing cost is reduced, and the heat dissipation performance is fundamentally changed; the built-in radiating fins are arranged, the lamp cap is used for radiating heat outwards, the radiating area is increased, and the heat can be radiated for a power supply (particularly an electrolytic capacitor).

Drawings

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown and described, and in which embodiments of the invention are shown by way of illustration, and not by way of limitation.

Fig. 1 is a schematic axial characteristic cross-sectional view of an LED bulb according to the present invention.

Fig. 2 is a schematic cross-sectional view taken along line a-a of fig. 1.

Fig. 3 is a schematic cross-sectional view at B-B in fig. 1.

Fig. 4 is a schematic axial characteristic cross-sectional view of an LED bulb according to the present invention.

Fig. 5 is a characteristic schematic view of the present invention.

Fig. 6 is a cross-sectional characteristic profile view of the lamp head according to the present invention.

Fig. 7 and fig. 8 are schematic cross-sectional characteristic profiles of two light sources according to the present invention.

In the figure: 1. the LED lamp comprises a lampshade, 2, a heat conduction base plate, 21, a lamp bead window, 3, LED lamp beads, 4, a metal PCB, 5, a power supply board, 51, a power supply device, 52, an electrolytic capacitor, 53, a touch electrode, 6, a lamp holder, 7, a built-in radiating fin, 71, a heat absorption section, 72, a radiating end, 73, a touch electrode, 8, an electrode connector, 9 and a separator.

Detailed Description

Fig. 1, fig. 2 and fig. 3 show the basic features of the present invention, the heat conducting base plate 2 is generally made of aluminum plate, and is provided with a lamp bead window 21, the LED lamp bead 3 is generally made of 2835LED packaging chip (patch type) and is welded on the metal PCB 4, the metal plate of the metal PCB 4 is aluminum plate, and is generally called aluminum substrate, one side of the heat conducting base plate 2 is adhered to the metal PCB 4, and the LED lamp bead 3 is located in the lamp bead window 21; the other side of the heat conducting base plate 2 is attached to the inner side surface of the lampshade 1. Realize that another face of thermal pad board 2 is pasting the medial surface of lamp shade 1, can also adopt integrative casting process, lamp shade 1 is the metal PCB board 4 outsides that the casting (note was moulded) pasted with LED lamp pearl at thermal pad board 2 and welding.

Shown in the figure are: the heat dissipation section 72 of the built-in heat sink 7 is inserted into the lamp cap 6 and located between the two commercial power input electrode connectors 8, the heat absorption section 71 is located between the metal PCB 4 and the power board 5, the built-in heat sink 7 has two pieces (preferably no less than two pieces when designed), and the two pieces of heat absorption section 71 surround the power board 5 and the power device 51 thereon.

In fig. 1, a heat conduction base plate 2 and a metal PCB plate 4 with LED lamp beads 3 soldered are disposed on the inner side wall of a lampshade 1; the inner front wall of the lampshade 1 is also provided with a heat conduction base plate 2 and a metal PCB 4 which is welded with LED lamp beads 3.

The present invention shown in fig. 4 differs from that shown in fig. 1 in that: 1) the two heat absorbing sections 71 of the built-in radiating fin 7 adopt a structure made of the same metal plate, and are bent at the lower end of the radiating section 72; 2) an insulating spacer 9 is arranged between the metal PCB 4 and the heat absorbing section 71, and the spacer 9 may be an insulating film arranged (or attached) on the inner side of the metal PCB 4; in order to lower the temperature of the power supply device 51 more, the spacer 9 may also be made of a heat insulating material.

Fig. 5 shows the present invention, the electrode joint 8 is made of metal plate, and is generally made of metal plate punching machine.

Fig. 6 shows the present invention, the electrode joint 8 is integrated with the built-in heat sink 7, and the two electrode joints 8 are respectively integrated with the two heat dissipation sections 72. The width of the heat dissipating section 72 (i.e., a + B) should be greater than one-half the width B of the base 6, i.e., a + B > 0.5B. The heat dissipating section 72 and the base 6 are typically formed by insert molding.

In the present invention shown in fig. 7, two internal heat sinks 7 of the internal heat sinks 7 are provided with the bump electrode 73, the edge of the power board 5 is provided with the bump electrode 53, and the power board 5 and the internal heat sinks 7 adopt an electric bump structure; the spacing body 9 adopts a ring-shaped structure and surrounds the heat absorbing section 71; the two heat absorbing sections 71 adopt an arc-shaped structure, surround the electrolytic capacitor 52, and particularly radiate heat of the electrolytic capacitor 52.

Fig. 8 shows the utility model discloses, the butt joint electrode 73 on the built-in fin 7 has adopted the V-arrangement structure, and the lateral wall of power strip 5 is provided with butt joint electrode 53.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. An LED bulb, comprising: lampshade (1), heat conduction backing plate (2), LED lamp pearl (3), metal PCB board (4), power strip (5), lamp holder (6), built-in fin (7), electrode joint (8), built-in fin (7) include heat absorption section (71) and heat dissipation section (72), its characterized in that: the heat conduction base plate (2) is made of a metal plate and is provided with a lamp bead window (21), a plurality of LED lamp beads (3) are welded on the metal PCB (4) in a surface mounting mode, one surface of the heat conduction base plate (2) is attached to the metal PCB, and the LED lamp beads (3) are positioned in the lamp bead window (21); a heat dissipation section (72) with a built-in heat dissipation sheet (7) is inserted in the lamp holder (6), and a heat absorption section (71) is arranged between the metal PCB (4) and the power panel (5).

2. The LED bulb of claim 1, wherein: the number of the internal radiating fins (7) is not less than two, and the power panel (5) is arranged between the heat absorbing sections (71) of the two internal radiating fins (7).

3. The LED bulb of claim 2, wherein: the heat dissipation section (72) of the built-in heat dissipation fin (7) adopts a structure made of the same metal plate.

4. The LED bulb of claim 1, wherein: the electrode joint (8) adopts an integrated structure with the built-in radiating fin (7).

5. The LED bulb of claim 4, wherein: the internal radiating fins (7) are provided with touch electrodes, and the power panel (5) and the internal radiating fins (7) adopt an electric touch structure.

6. The LED bulb of claim 5, wherein: the edge of the power panel (5) is provided with a touch electrode.

7. The LED bulb of claim 5, wherein: the side wall of the power panel (5) is provided with a touch electrode.

8. The LED bulb of claim 7, wherein: the touch electrode on the built-in radiating fin (7) adopts a V-shaped structure.

9. The LED bulb of claim 1, wherein: an insulating spacer (9) is arranged between the metal PCB (4) and the heat absorbing section (71).

10. The LED bulb of claim 9, wherein: the separator (9) adopts a ring-shaped structure.

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