TW201337162A - Light-emitting diode bulb - Google Patents

Abstract

A light-emitting diode bulb includes a lamp body, a cooling copper sheet, a circuit board, a light emitting diode and a cooling aluminum tube, the lamp body includes a lamp holder, a lamp shade mounted at the top of the lamp holder, and an electrical connector arranged at the lower side of the lamp holder, the amp holder has a substrate, the cooling copper sheet is arranged on the substrate top surface, the circuit board is arranged on the top surface of the cooling copper sheet, the light emitting diode is disposed on the circuit board, the cooling aluminum tube is connected to the electrical connector. The present invention installs the cooling aluminum tube on the electrical connector in order to conduct the primary excess heat from the cooling aluminum tube to the electrical connector, and the remaining part of excess heat is conducted from the cooling copper sheet to the lamp holder and further to the outside by means of thermal radiation conduction, since a total of two thermal paths are provided, the heat dissipation problem can be effectively solved.

Description

Light-emitting diode bulb

The invention relates to a lighting appliance, in particular to a light-emitting diode bulb.

In the past, a light-emitting diode bulb is difficult to solve due to heat dissipation. Therefore, in order to increase the illumination intensity of the light-emitting diode bulb, it is necessary to use a plurality of low-power LEDs, and the light-emitting diodes must be used. They are spaced apart from each other and cannot be closely arranged to avoid the problem of excessive temperature. For example, as disclosed in Japanese Patent No. 201024621, the light-emitting diodes are arranged in a ring shape.

It can be seen from the above that since the heat dissipation problem is not solved, the light-emitting diodes can only be arranged at intervals, which causes multiple shadows in actual use, resulting in visual discomfort. In addition, the illumination intensity of the light-emitting diode bulb is also Limited by heat dissipation problems, it cannot be effectively improved.

Therefore, a light-emitting diode bulb that can effectively solve the heat dissipation problem is one of the research and development targets of related companies.

Accordingly, it is an object of the present invention to provide a light-emitting diode bulb that can effectively solve the heat dissipation problem.

Therefore, the light-emitting diode bulb of the present invention comprises a lamp body, a heat-dissipating copper plate, a circuit board, a light-emitting diode, and a heat-dissipating aluminum tube. The lamp body includes a lamp holder and a lamp holder is mounted thereon. a lampshade, and an electrical connector mounted under the lamp holder, the lamp holder has a substrate, the heat dissipation copper piece is disposed on the top surface of the substrate, and the circuit board is disposed on the top surface of the heat dissipation copper piece, the light emitting diode The heat dissipation aluminum tube is connected to the electrical connector.

The effect of the present invention is that the heat dissipating aluminum tube is mounted on the electrical joint through the heat dissipating aluminum tube, so that the main excess heat energy is conducted from the heat dissipating aluminum tube to the electric joint, and the remaining part of the excess heat energy is transmitted from the heat dissipating copper sheet to The lamp holder and the heat radiation are conducted outward, and there are two heat dissipation paths in total, so that the heat dissipation problem can be effectively solved.

The foregoing and other objects, features, and advantages of the invention are set forth in the <RTIgt;

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , a first preferred embodiment of a light-emitting diode bulb of the present invention comprises a lamp body 1 , a heat-dissipating copper plate 2 , a circuit board 3 , a light-emitting diode 4 , and a plurality of screws 5, and a heat dissipation aluminum tube 6.

The lamp body 1 includes a lamp holder 11 , a lamp cover 12 mounted above the lamp holder 11 , and an electrical connector 13 mounted under the lamp holder 11 . The lamp holder 11 has a substrate 111 and a top edge 112 . The lamp holder 11 is provided with a plurality of heat dissipation holes 113. The heat dissipation copper sheets 2 are disposed on the top surface of the substrate 111 of the socket 11. The heat dissipation holes 113 can reduce the overall weight in addition to the heat dissipation convection.

Referring to FIG. 4 , the circuit board 3 is disposed on the top surface of the heat dissipation copper sheet 2 , and the circuit board 3 includes a top surface 31 having a height higher than the top edge 112 of the socket 11 , and a corresponding portion of the light emitting diode 4 is disposed. The light-emitting diodes 4 are disposed on the circuit board 3.

In the first preferred embodiment, the number of the screws 5 is two, and the screws 5 are connected to the heat dissipation aluminum tube 6 through the substrate 111 of the socket 11.

The heat dissipating copper sheet 2 is disposed between the circuit board 3 and the substrate 111 of the lamp holder 11 , and the heat dissipating copper sheet 2 includes a protruding block 21 corresponding to the through hole 32 of the circuit board 3 . The bottom of the polar body 4 contacts the protruding block 21, so that the heat generated by the light-emitting diode 4 can be transmitted to the socket 11 through the heat-dissipating copper sheet 2, thereby conducting the heat radiation outward.

It is further explained that the protruding block 21 of the heat-dissipating copper sheet 2 and the circuit board 3 have a precise tolerance fit, so that the protruding block 21 and the circuit board 3 are coplanar design, so that the light-emitting diode 4 and the protruding block 21 are tightly and uniformly bonded to each other to enhance the heat dissipation effect.

It should be noted that the area of the circuit board 3 is slightly larger than that of the heat dissipating copper sheet 2, so that the power supply line can be soldered to the edge of the circuit board 3, and the solder is prevented from being cooled too early due to heat dissipation of the heat dissipating copper sheet 2.

Since the top surface 31 of the circuit board 3 is higher than the top edge 112 of the socket 11, in the preferred embodiment, it is about 3 to 5 mm higher. Therefore, the light of the LED 4 is not It is blocked by the top edge 112 of the socket 11, that is, the design can effectively emit light outward.

The heat-dissipating aluminum tube 6 is connected to the electrical connector 13. The heat-dissipating aluminum tube 6 is made of pure aluminum. The heat-dissipating aluminum tube 6 has a thermal conductivity of 204 W/mK, and the heat-dissipating aluminum tube 6 passes through the substrate 111 of the socket 11. And the screws 5 receive the thermal energy from the light-emitting diode 4 and conduct the heat energy to the electrical connector 13. In addition, the heat of the heat-dissipating aluminum tube 6 can also radiate heat through the air and pass through the heat dissipation holes 113. Radiation outward.

It should be noted that the lampshade 12 and the heat-dissipating aluminum tube 6 and the lamp holder 11 are closely and waterproofly connected to each other, so that the light-emitting diode 4, the circuit board 3, and the heat-dissipating copper sheet 2 are protected from water. The invention of the light-emitting diode bulb is suitable for installation in an outdoor space.

Referring to FIG. 5 and FIG. 6, the second preferred embodiment of the light-emitting diode bulb of the present invention is substantially the same as the assembly of the first preferred embodiment, except that the heat dissipation is in the second preferred embodiment. The aluminum tube 6 has a cylindrical shape, and the heat-dissipating aluminum tube 6 is screwed to the substrate 111 of the socket 11, and the thickness of the substrate 111 near the screw hole is thickened to facilitate the internal thread.

In summary, the advantages of the present invention are as follows:

1. The heat-dissipating aluminum tube 6 is mounted on the electrical connector 13, so that the main excess heat energy is conducted from the heat-dissipating aluminum tube 6 to the electrical connector 13 to form a main heat-dissipating path. The remaining part of the excess heat is conducted from the heat-dissipating copper sheet 2 to the socket 11 and the heat radiation is conducted outward to form a secondary heat-dissipating path. There are two heat dissipation paths in total, so the heat dissipation problem can be effectively solved. The surface temperature of the lamp holder 11 meets the safety standard of 62 ° C. The temperature is low and does not burn. In addition, the present invention also meets another safety regarding illumination and lumens. The specification requires that the invention has two heat dissipation paths to promote photoelectric conversion efficiency.

Second, since the present invention can effectively solve the heat dissipation problem, the light-emitting diode 4 can be selected from a high-power model, and a single light-emitting diode 4 can have a high-brightness performance, which can replace the previous use of multiple The bulb of the low-power LED 2 can be greatly reduced in terms of material cost and manufacturing man-hour.

Third, the single use of a single light-emitting diode 4 also avoids multiple shadow problems and enhances visual comfort, so that the object of the present invention can be achieved.

4. The lamp holder 11 has a smooth surface and no fins, so it does not scratch the user.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1. . . Lamp body

11. . . Lamp holder

111. . . Substrate

112. . . Top edge

113. . . Vents

12. . . lampshade

13. . . Electrical connector

2. . . Heat sink copper

3. . . Circuit board

31. . . Top surface

4. . . Light-emitting diode

5. . . Screw

6. . . Heat dissipation aluminum tube

1 is an exploded perspective view showing a first preferred embodiment of the light-emitting diode bulb of the present invention;

Figure 2 is a perspective view showing a lamp body of the first preferred embodiment;

3 is a perspective view showing a heat dissipating copper piece, a circuit board, a light emitting diode, and a plurality of screws;

4 is a partial cross-sectional view showing the heat dissipating copper sheet, the circuit board, the light emitting diode, the screw, and a heat dissipating aluminum tube of the first preferred embodiment;

Figure 5 is a perspective exploded view showing a second preferred embodiment of the light-emitting diode bulb of the present invention; and

6 is a partial cross-sectional view showing the heat dissipating copper sheet, the circuit board, the light emitting diode, the screw, and the heat dissipating aluminum tube of the second preferred embodiment.

1. . . Lamp body

11. . . Lamp holder

111. . . Substrate

112. . . Top edge

113. . . Vents

12. . . lampshade

13. . . Electrical connector

2. . . Heat sink copper

3. . . Circuit board

31. . . Top surface

4. . . Light-emitting diode

5. . . Screw

6. . . Heat dissipation aluminum tube

Claims (8)

A light-emitting diode bulb comprising: a lamp body, comprising a lamp holder, a lamp cover mounted above the lamp holder, and an electrical connector mounted under the lamp holder, the lamp holder having a substrate; a heat dissipation copper And a heat dissipation copper tube is disposed on the electrical connector. The light-emitting diode bulb according to claim 1, wherein the socket is provided with a plurality of heat dissipation holes. The light-emitting diode bulb of claim 1, wherein the socket further comprises a top edge, the circuit board comprising a top surface having a height higher than a top edge of the socket. The light-emitting diode bulb according to claim 1, wherein the heat-dissipating aluminum tube is made of pure aluminum, and the heat-dissipating aluminum tube has a thermal conductivity of 204 W/mK. The light-emitting diode bulb according to claim 1, further comprising a plurality of screws, the screws being disposed on the substrate and connected to the heat-dissipating aluminum tube. The light-emitting diode bulb of claim 1, wherein the circuit board further comprises a through hole corresponding to the light-emitting diode, the heat-dissipating copper piece comprising a protruding block correspondingly disposed in the through hole. The bottom of the light emitting diode contacts the protruding block. The light-emitting diode bulb according to claim 5, wherein the heat-dissipating aluminum tube has a rectangular column shape. The light-emitting diode bulb according to claim 1, wherein the heat-dissipating aluminum tube has a cylindrical shape, and the heat-dissipating aluminum tube is screwed to the substrate of the socket.