TW201314115A - LED lamp - Google Patents

Abstract

A LED lamp includes a heat transfer tube, an end cap, a PCB, a plurality of LED, an insulating element, and an AC/DC converter. The heat transfer tube has a placement surface and a containing room, and the end cap is disposed on the end of the heat transfer tube. The PCB is disposed on the placement surface of the heat transfer tube and the AC/DC converter is disposed in the containing room. The output terminal of the AC/DC converter is disposed on the PCB to provide power to the LED on the PCB. The insulating element is disposed on one end of the heat transfer tube and combined with the end cap. The insulating element includes an insulating plate and an extending portion. The insulating plate has a through hole. The AC/DC converter has an inputting conductive line which is passed through the through hole and electrically connected with conductive bars of the end cap. The insulating plate is disposed between the AC/DC converter and the conductive bars, in order to insulate the AC/DC converter and the conductive bars on the end cap.

Description

LED tube

The present invention relates to a tubular lamp, and more particularly to an LED lamp.

Light emitting diode (LED) has the characteristics of low energy consumption, long service life, small size, fast response, etc., and its technology development has become increasingly mature in recent years, so it has gradually replaced Traditional lamps, especially LEDs, are used in the most used fluorescent tubes, namely: LED tubes, which are currently the mainstream topics in the industry.

At present, the LED tube on the market generally comprises a circuit board and a plurality of LEDs, which are disposed on one surface of the circuit board. In order to eliminate the heat emitted by the LED, a semi-cylindrical heat-dissipating tube body is formed on the other surface of the circuit board, and the heat-dissipating tube body is made of aluminum. By dissipating the heat pipe body, the waste heat generated by the LED can be eliminated. Since the heat-dissipating tube body is made of aluminum or other metals with high thermal conductivity, and these metals with thermal conductivity often have good electrical conductivity, it may cause leakage and cause the user to install. There are safety concerns when using LED tubes.

The reason why the leakage occurs is mainly because when the current flows inside the LED tube, the current may be conducted to the heat dissipation tube body due to poor design of the electrical insulation. In order to avoid leakage, some LED manufacturers will set the AC-DC converter outside the LED tube, but this will require additional space on the lamp holder to accommodate the AC-DC converter, but this will result in LED tube is inconvenient to install.

Therefore, how to make the design of the LED tube conform to the safety specification, and at the same time, the user does not have inconvenience when installing the LED tube, which is worthy of the problem that the ordinary knowledge in the field pays attention to.

The object of the present invention is to provide an LED lamp tube which can meet the safety specifications and at the same time allows the user to have no inconvenience when installing the LED tube.

In accordance with the above and other objects, the present invention provides an LED tube. The LED tube comprises a heat pipe body, an end cover, at least one circuit board, a plurality of LEDs, an insulating member, and an AC/DC converter. The heat pipe body has a placement surface and an accommodation space, and the end cover is disposed at one end of the heat dissipation pipe body. Two conductive rods are disposed on the end cover, and the conductive rods extend through the end cover. The circuit board is disposed on the placement surface of the heat pipe body, and the LEDs are distributed on the circuit board. The AC/DC converter is located in the accommodating space, and the output end thereof is disposed on the circuit board to supply power to the LEDs disposed on the circuit board. The insulating member is disposed at one end of the heat dissipating tube body and is made of an insulating material, and the insulating member is combined with the end cap. The insulating member includes a barrier and an extension, wherein the barrier has a perforation. The extension portion is disposed on the barrier plate, and the extension portion is fixed on the inner surface of the heat dissipation pipe body. Wherein, the AC-DC converter has an input wire that is electrically connected to the conductive bar through a through hole of the barrier plate. Moreover, the baffle plate is located between the AC-DC converter and the conductive bar to electrically isolate the AC-DC converter from the conductive bar.

In the above LED lamp tube, the upper edge of the extending portion is provided with a rib, and the rib surrounds the end of the circuit board to electrically isolate the output end of the AC/DC converter from the heat dissipating tube body.

In the above LED tube, the input wire is a space surrounded by the extension to electrically isolate the input wire from the heat pipe body.

In the above LED lamp tube, two mounting boards are disposed on the surface of the heat dissipating tube body, and an insulating glue is applied to the joint of the two circuit boards. .

In the LED tube described above, the LED has a safe distance from the side of the circuit board, and the safety distance is, for example, 6 mm.

In the above LED tube, the heat pipe body is made of aluminum.

In the above LED tube, at least one cassette is disposed on the inner side of the end cover, and the end cover is engaged with the insulating member by the perforation on the cassette and the blocking plate.

In the above LED tube, the heat dissipation tube body has a hollow semi-cylindrical shape.

The above described objects, features, and advantages of the present invention will become more apparent from the following description.

Please refer to FIG. 1A and FIG. 1B. FIG. 1A illustrates a first embodiment of an LED lamp of the present invention, and FIG. 1B illustrates an exploded view of the LED lamp. The LED tube 100 includes a heat pipe body 110, an end cover 120, a circuit board 130, a plurality of LEDs 140, an isolation member 150, and an AC/DC converter 160. The heat pipe body 110 is semi-cylindrical and has a placement surface 112, and the circuit board 130 is disposed on the placement surface 112. The LEDs 140 are distributed on the other side of the circuit board 130 with respect to the heat dissipation tube body 110. In the present embodiment, the heat-dissipating tube body 110 is hollow, and has an accommodating space 114 inside the heat-dissipating tube body 110. The AC-DC converter 160 is disposed inside the heat-dissipating tube body 110, and the AC-DC converter 160 The alternating current can be converted to direct current and the direct current can be transmitted to the LED 140 to illuminate the LED 140. Generally, the outside of the AC/DC converter 160 is also provided with an insulating tube (not shown), which is also located inside the heat dissipating tube body 110 for electrically isolating the heat dissipating tube body 110 and the AC/DC converter. 160. When the LED 140 is driven, it emits waste heat at the same time, and the waste heat is conducted to the outside through the heat pipe body 110. In the present embodiment, the heat pipe body 110 is made of aluminum, but those skilled in the art may also use other heat conductive materials to fabricate the heat pipe body 110. In addition, the insulating member 150 is made of an insulating material (for example, polymethyl methacrylate) and is disposed at one end of the heat radiating tube body 110. In addition, the LED tube 100 also includes a lamp cover 170, but to show the circuit board 130 and the LED 140, the lamp cover 170 is hidden in FIG. 1A. In addition to preventing the circuit board 130 and the LED 140 from being contaminated by the external environment, the function of the lamp cover 170 can also homogenize the light emitted by the LED 140.

Referring to FIG. 2A and FIG. 2B , FIG. 2A is a perspective view of the insulating member 150 , and FIG. 2B is an exploded view between the insulating member 150 and the end cap 120 . The insulating member 150 is an integrally formed component, and includes a blocking plate 152, an extending portion 154, a protruding rib 156, and a set of fittings 158. The extending portion 154 is disposed on the blocking plate 152 and extends into the heat dissipation. The inside of the tube body 110. In the present embodiment, the extension portion 154 is combined on the heat dissipation pipe body 110 by means of adhesive fixing.

A pair of latches 126 are further disposed on the inner side of the end cap 120, and two perforations are formed on the baffle plate 152, namely, the through holes 152a and the through holes 152b. The end cap 120 can be assembled on the insulating member 150 by snapping the tab 126 onto the through hole 152a and the through hole 152b. In addition, when the end cap 120 is assembled to the insulating member 150, the alignment of the end cap 120 can be facilitated by the fitting member 158, and the end cap 120 can also be more stably assembled on the insulating member 150.

The end cover 120 is further provided with two conductive bars 122 (shown in FIG. 1A ). The conductive bars 122 pass through the end cover 120 . One end of the conductive bar 122 protrudes out of the end cover 120 and can be inserted into the end cover 120 . A socket (not shown) is inserted into the interior of the end cap 120 and an adapter 124 is disposed thereon. Moreover, the AC to DC converter 160 also has an input lead 164 that is coupled to the adapter 124 through a perforation 152a in the baffle 152. Therefore, external power is transmitted to the AC/DC converter 160 via the conductive bar 122, the adapter 124, and the input wire 164, and then the AC/DC converter 160 converts the AC power into DC power. Since the barrier 152 is disposed between the AC/DC converter 160 and the conductive bar 122 or the adapter 124, the discharge of the ends of the conductive bar 122 or the adapter 124 is not conducted to the heat pipe body 110. Further, in the present embodiment, the extending portion 154 has a semi-arc shape, and the space 154a surrounded by it is allowed to pass through the input wire 164. Since the extension portion 154 is made of an insulating material, it can electrically isolate the input wire 164 from the heat dissipation pipe body 110, thereby preventing current in the input wire 164 from being conducted to the heat dissipation pipe body 110.

In addition, please refer to FIG. 2A and FIG. 3 at the same time. FIG. 3 illustrates a part of the LED tube, and the combination of the circuit board 130, the LED 140, the isolation member 150, and the heat dissipation tube body 110 is illustrated in FIG. relationship. As can be seen from FIG. 3, the output terminal 162 of the AC/DC converter 160 is disposed on the circuit board 130. The AC/DC converter 160 outputs the DC power source from the output terminal 162, and then passes through a circuit (not shown) on the circuit board 130. It is transmitted to each LED 140. In addition, the insulating member 150 further includes a rib 156 disposed at an upper edge of the extending portion 154 and surrounding the end of the circuit board 130 to electrically isolate the output end 162 of the AC/DC converter 160 from heat dissipation. The tube body 110. In addition, the distance between the LED 140 and the side of the circuit board 130 is maintained at a safe distance D, which in this embodiment is 6 mm. That is to say, the leakage generated by the LED 140 is not conducted to the heat dissipation pipe body 110.

Due to the arrangement of the baffle 152 of the spacer 150, the discharge of the ends of the conductive bar 122 or the adapter 124 is not conducted to the heat pipe body 110. In addition, the extension portion 154 of the insulating member 150 exists between the AC/DC converter 160 and the heat dissipation tube body 110, so that the heat dissipation tube body 110 is not charged by the influence of the AC/DC converter 160. In addition, since the two sides of the output end 162 of the AC/DC converter 160 are provided with the ribs 156, the discharge of the output end 162 is not conducted to the heat dissipation tube body 110. Therefore, since the heat dissipation tube body 110 is not charged by the current inside the LED tube 100, the user does not have to worry about safety problems such as electric shock when installing the LED tube 100.

Please refer to FIG. 4. FIG. 4 illustrates a second embodiment of the LED tube of the present invention. In the present embodiment, elements similar to those of the first embodiment will be denoted by the same reference numerals and will not be described in detail. In the present embodiment, the LED tube 100' has two circuit boards 130, which are connected to each other. In addition, an insulating adhesive 132 is filled between the two circuit boards 130. The insulating adhesive 132 is, for example, silicone, which is used to fill the gap between the two circuit boards 130 to prevent current from being conducted to the heat pipe through the air in the gap. Body 110. In addition, the insulating paste 132 also has the effect of fixing the circuit board 130.

The present invention has been described above by way of examples, and is not intended to limit the scope of the claims. The scope of patent protection is subject to the scope of the patent application and its equivalent fields. Modifications or modifications made by those skilled in the art, without departing from the spirit or scope of the invention, are equivalent to the equivalents or modifications made in the spirit of the invention and should be included in the following claims. Inside.

100. . . LED tube

110. . . Heat pipe body

112. . . Placement surface

114. . . Housing space

120. . . End cap

122. . . Conductive rod

124. . . Adapter

126. . . Latch

130. . . Circuit board

140. . . LED

150. . . Insulation

152. . . Barrier

152a, 152b. . . perforation

154. . . Extension

156. . . Rib

158. . . Fitting

160. . . AC to DC converter

162. . . Output

164. . . Input wire

170. . . lampshade

FIG. 1A illustrates a first embodiment of an LED lamp of the present invention, and FIG. 1B illustrates an exploded view of the LED lamp.

2A is a perspective view of the insulating member, and FIG. 2B is an exploded view between the insulating member and the end cap.

FIG. 3 is a part of an LED lamp tube, which illustrates a combination relationship between a circuit board, an LED, an insulating member, and a heat dissipation tube body.

FIG. 4 illustrates a second embodiment of the LED tube of the present invention.

150. . . Insulation

152. . . Barrier

152a, 152b. . . perforation

154. . . Extension

156. . . Rib

158. . . Fitting

Claims (10)

An LED lamp tube comprises: a heat dissipating pipe body having a placing surface and an accommodating space; and an end cap disposed at one end of the heat dissipating pipe body, wherein the end cap is provided with two a conductive rod, the conductive rod runs through the end cover; at least one circuit board, the circuit board is disposed on the placement surface; a plurality of LEDs, the LED is disposed on the circuit board; an AC-DC converter, the AC-DC conversion The device is located in the accommodating space, the output end of the AC/DC converter is disposed on the circuit board to supply power to the LED; and an insulating member is disposed at one end of the heat dissipating tube body and is made of an insulating material The insulating member is assembled with the end cover, the insulating member comprises: a blocking plate having a through hole; and an extending portion, the extending portion is disposed on the blocking plate, and the extending portion is fixed On the inner surface of the heat-dissipating tube body; wherein the AC-DC converter has an input wire, the input wire is electrically connected to the conductive bar through a through hole of the barrier plate, and the barrier plate is located at the AC-DC Converter and the conductive rod , So that the AC-DC converter is electrically insulated from the conductive rod. The LED tube of claim 1, wherein a rib is disposed on an upper edge of the extending portion, the rib surrounding an end of the circuit board, so that the output end of the AC/DC converter is electrically Isolated from the heat pipe body. The LED lamp of claim 1, wherein the input wire is a space surrounded by the extension to electrically isolate the input wire from the heat pipe body. The LED tube of claim 1, wherein two circuit boards are disposed on the placement surface, and an insulating glue is applied to the connection of the two circuit boards. The LED lamp of claim 1, wherein the LED has a safe distance from a side of the circuit board. The LED tube of claim 5, wherein the safety distance is 6 mm. The LED tube of claim 1, wherein the heat pipe body is made of aluminum. The LED tube of claim 1, wherein at least one cassette is disposed on the inner side of the end cover, and the end cover is stuck with the insulating member by the latch and the perforation on the blocking plate. Pick up. The LED tube of claim 1, wherein the insulating member further comprises a set of fittings that are sleeved with the end cap. The LED lamp of claim 1, wherein the heat pipe body has a hollow semi-cylindrical shape.