TWI412690B - Light emitting diode tube - Google Patents

Abstract

A light emitting diode (LED) tube includes a heat dissipation base, a circuit board, a driving module and a cover set on the heat dissipation base, and two holders located at two opposite ends thereof. The driving module is electrically connectted with an external power by the holders. The heat dissipation base has a hollow tubular structure and the driving module is set in the internal space thereof. An elongated recess is defined on a surface of the heat dissipation base facing to the cover. The circuit board is set on the recess. A plurality of LED arranged on the circuit board and electrically connected with the driving module. The recess has two hook sections at opposite ends for fixing the circuit board on the heat dissipation base.

Description

Light-emitting diode tube

The invention relates to a light-emitting diode lamp.

A Light Emitting Diode (LED) is a semiconductor component that converts current into light of a specific wavelength range. The light-emitting diode is widely used in the field of illumination because of its high brightness, low operating voltage, low power consumption, easy matching with integrated circuits, simple driving, and long life. For example, a light-emitting diode is arranged in a strip shape to form a light-emitting diode lamp for replacing a conventional fluorescent tube.

Previous light-emitting diode lamps typically included a light panel, a housing, and a drive power source. However, in the above-described light-emitting diode lamp, the lamp board, the outer casing and the driving power source are generally integrated. When a part of the lamp is damaged due to a failure of the lamp or the driving power supply, the entire lamp needs to be replaced.

In view of the above, it is necessary to provide a light-emitting diode lamp tube that can be easily replaced with its components.

A light-emitting diode lamp comprises a heat-dissipating base, a circuit board disposed on the heat-dissipating base, a driving power source and a lamp cover, and a lamp cap disposed at two ends of the lamp tube. The circuit board is provided with a plurality of light emitting diodes electrically connected to the driving power source. The lamp head electrically connects the driving power source to the external power source. The heat dissipation base has a hollow tubular structure, and the driving power source is disposed inside the heat dissipation base. The outer surface of the heat dissipation base opposite to the lamp cover has a concave portion, and the circuit board is disposed on the concave portion of the heat dissipation base. The recess has oppositely disposed hooks for securing the circuit board to the heat sink base.

The lamp tube is disassembled into a heat sink base, a circuit board, a driving power source and a lamp cover, and the circuit board, the driving power source and the lamp cover are disposed at different positions of the heat sink base. Therefore, when one of the components is damaged, only the corresponding component needs to be replaced to continue the normal operation of the lamp. In addition, since the heat sink base is provided with a recessed portion and a corresponding hook, after the circuit board is inserted into the recessed portion, it can be effectively fixed to the heat sink base without the need of a screw due to the action of the hook.

10‧‧‧ Thermal base

110‧‧‧ cavity

120‧‧‧ recessed

121‧‧‧ hook

130‧‧‧heat sink

140‧‧ ‧ chute

141‧‧‧Open end

20‧‧‧ boards

210‧‧‧Lighting diode

30‧‧‧Drive power supply

40‧‧‧shade

410‧‧‧rails

50‧‧‧ lamp holder

510‧‧‧Connector

520‧‧‧electrode pins

530‧‧‧ screw hole

1 is a perspective assembled view of a light-emitting diode lamp in an embodiment of the present invention.

2 is a schematic cross-sectional view of the light-emitting diode lamp of FIG. 1.

The invention will now be further described with reference to the specific embodiments thereof with reference to the accompanying drawings.

1 to 2 show an embodiment of a light-emitting diode lamp of the present invention. The LED lamp includes a heat dissipation base 10, a circuit board 20 disposed on the heat dissipation base 10, a driving power source 30 and a lamp cover 40, and two ends of the lamp tube for driving the power source 30 and the external power source. Electrically connected base 50.

The heat dissipation base 10 is integrally formed of a material having good thermal conductivity such as an aluminum alloy or the like. The heat dissipation base 10 is a hollow tubular structure having a cavity 110 formed therein. The surface of the heat dissipation base 10 has a recessed portion 120 and a plurality of heat dissipation slots 130. The heat sink 130 extends radially along the length of the tube. The heat dissipation groove 130 is used to increase the surface area of the heat dissipation base 10 to enhance the heat dissipation effect of the heat dissipation base 10. On both sides of the heat dissipation base 10 near the concave portion 120, a sliding groove 140 extending in the radial direction of the tube is provided, and the sliding groove 140 is used to fix the lamp cover 40.

The circuit board 20 is disposed on the recess 120 on the surface of the heat dissipation base 10. The circuit board 20 is provided with a plurality of light-emitting diodes 210 arranged in a row along the length of the lamp tube and electrically connected to the driving power source 30. Both ends of the recessed portion 120 are provided with hooks 121 extending inward. When the circuit board 20 is slidably assembled to the recessed portion 120 by one end of the lamp tube, the hook 121 can effectively fix the circuit board 20 on the heat dissipation base 10 so as not to be recessed from the heat dissipation base 10. 120 off. With this fixing, the circuit board 20 can be fixed to the heat sink base 10 without requiring other fixing members such as screws or rivets.

The driving power source 30 is disposed in the cavity 110 inside the heat dissipation base 10. The driving power source 30 is used to provide a corresponding driving voltage or current for the normal operation of the LED 210. The driving power source 30 includes a rectifying and filtering circuit and a voltage regulating circuit. The rectifying and filtering circuit is used for converting the commercial alternating current into direct current, and the voltage regulating circuit is used for modulating the voltage to a suitable size to supply the light emitting diode. Preferably, the output end of the driving power source 30 is provided in a pluggable form to form an electrical connection to facilitate assembly and disassembly of the driving power source 30.

The lampshade 40 has an arcuate body and a slide rail extending inwardly from both sides of the arcuate body 410. The slide rails 410 are slidably assembled in the sliding slots 140 on both sides of the heat dissipation base 10 so that the light cover 40 can be fixedly fixed to the heat dissipation base 10 . The lamp cover 40 is integrally formed of a transparent or translucent material such as polycarbonate (PC) or polyethylene methyl acrylate. The lamp cover 40 is disposed on the light exit surface of the light emitting diode 210 for adjusting the light emitted by the light emitting diode 210. If necessary, a scattering structure may be formed on the surface of the globe 40 or the scattering particles may be incorporated in the globe 40 to improve the uniformity of the light emitted from the bulb. Alternatively, the phosphor powder is coated on the surface of the lamp cover or the phosphor particles are incorporated in the lamp cover 40 to change the light-emitting wavelength of the lamp. In this embodiment, the cross-sectional shape of the slide rail 410 and the sliding slot 140 is a superior arc, that is, the central angle of the cross section of the sliding rail 410 and the sliding slot 140 is greater than 180 degrees. The sliding slot 140 has an open end 141 extending along the length of the lamp tube for slidably fixing the lamp cover 40 to the heat sink base 10. Preferably, the width d of the open end 141 is smaller than the diameter Φ of the slide rail 410, so that the slide rail 410 does not easily fall off the open end 141 of the chute 140 after sliding into the chute 140. Therefore, after a period of use, the lamp cover 40 is detached from the open end of the chute 140 due to aging or deformation, so that the lamp cover 40 is separated from the heat dissipation base 10.

The base 50 is disposed at both ends of the tube. Each of the bases 50 includes a generally cylindrical joint 510 and two electrode pins 520 projecting from one side of the joint 510 and spaced apart. The joint 510 houses the lamp cover 40 and the heat dissipation base 10. The electrode pin 520 is electrically connected to the driving power source 30 for connecting the driving power source 30 to an external power source such as a commercial alternating current. The joint 510 has two spaced apart screw holes 530, the position of the screw holes 530 and the two sliding on the heat dissipation base 10 The position of the slot 140 corresponds. Correspondingly, corresponding internal threads are provided on the two ends of the sliding slot 140 near the base 50. After the base 50 is assembled at both ends of the tube, the assembly screw can be used to pass through the screw hole 530 of the base 50, and then the screw is rotated. The slide slot 140 is inserted into the slot 140 such that the base 50 is coupled to the heat sink base 10.

When the light-emitting diode lamp assembly is assembled, the circuit board 20 provided with the light-emitting diode 210 is first inserted into the concave portion 120 of the heat dissipation base 10 along one end of the light-emitting tube, and the hook on the concave portion 120 at this time. 121 will fix the circuit board 20 to the heat sink base 10 without falling off. The driving power source 30 is then disposed in the cavity 110 inside the heat dissipation base 10, and the output end of the driving power source 30 is inserted into the circuit board 20 for supplying power to the LEDs 210 on the circuit board 20. The slide rails 410 at the two ends of the lamp cover 40 are corresponding to the sliding slots 140 at the two ends of the heat dissipation base 10, and then the slide rails 410 are slid along the sliding slots 140 until they are completely accommodated in the sliding slots 140. The lamp caps 50 are disposed at both ends of the lamp tube, and the joint 510 on the cap 50 houses the heat sink base 10 and the lamp cover 40 together. The built-in end of the electrode pin 520 of each of the caps 50 is electrically connected to the input end of the driving power source 30 for connecting the driving power source 30 to an external power source. The assembly screw is screwed into the chute 140 through a screw hole in the joint 510, thereby assembling the base 50 with the heat dissipation base 10. In this way, the LED package is assembled.

In the present invention, by disposing the structure of the heat dissipation base 10, the circuit board 20, the driving power source 30, and the lamp cover 40 are respectively provided at different positions of the heat dissipation base 10. At this point, if a component in the lamp is damaged, it can be replaced accordingly without replacing the entire lamp. In addition, corresponding hooks 121 are disposed on the recessed portion 120 of the heat dissipation base 10. After the circuit board 20 is inserted into the recess 120, In the fastening action of the hook 121, the circuit board 20 can be effectively fixed to the surface of the heat dissipation base 10 without screws, so that the circuit board 20 is not easily detached from the heat dissipation base 10. Moreover, this combination of the circuit board 20 and the heat sink base 10 also facilitates assembly of the circuit board 20. At the same time, the lamp cover 40 can be easily realized by sliding the sliding rails 140 of the lamp cover 40 into the sliding slots 140 by providing the sliding slots 140 on both sides of the heat dissipation base 10 and the corresponding sliding rails 410 on both sides of the light cover 40. Combined with the heat sink base 10. Further, since the thickness of the slide rail 410 is smaller than the width of the open end 141 of the sliding slot 140, after the lamp tube is used for a period of time, it is not easy to cause the slide rail 410 to fall off the chute 140 due to deformation of the material used for the lamp cover 40. Thereby, the lamp cover 40 is detached from the heat dissipation base 10.

The manner in which the base 50 and the heat dissipation base 10 are combined is not limited to the above embodiment as needed. For example, a screw hole may be additionally provided on the side surface of the heat dissipation base 10 so that the assembly screw is not fixed to the sliding slot 140 but is provided to another screw. On the hole. In addition, the base 50 can also be coupled to the heat dissipation base 10 by means of a click. Similarly, external threads may be provided on the outer surface of the lamp cover 40 and the heat dissipation base 10 and corresponding internal threads may be disposed on the inner side of the joint 510 of the base 50, so that the lamp cover 40 can be screwed into the heat dissipation base 10 and the cover 40. end.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧ Thermal base

110‧‧‧ cavity

120‧‧‧ recessed

121‧‧‧ hook

130‧‧‧heat sink

140‧‧ ‧ chute

141‧‧‧Open end

20‧‧‧ boards

210‧‧‧Lighting diode

30‧‧‧Drive power supply

40‧‧‧shade

410‧‧‧rails

Claims (5)

A light-emitting diode lamp comprises a heat-dissipating base, a circuit board disposed on the heat-dissipating base, a driving power source and a lamp cover, and a lamp cap disposed at two ends of the lamp tube, wherein the circuit board is provided with a plurality of electrical connections with the driving power source The light-emitting diode electrically connects the driving power source to the external power source. The improvement is that the heat-dissipating base has a hollow tubular structure, and the driving power source is disposed inside the heat-dissipating base, and the heat-dissipating base is opposite to the lamp housing. The surface has a recessed portion, the circuit board is disposed on the concave portion of the heat dissipation base, and the concave portion has oppositely disposed hooks for fixing the circuit board on the heat dissipation base, the light cover has an arc body and a sliding rail extending inwardly on both sides of the curved body, and two sides of the heat dissipation base adjacent to the concave portion are provided with a sliding slot extending radially in the light pipe, the sliding rail is slidably installed in the sliding slot to make the lampshade The fixing head is fixed on the heat dissipation base, and the screw head is provided with a screw hole at a position corresponding to the sliding slot, and the assembly screw is screwed into the sliding slot through the screw hole to fix the lamp cap and the heat dissipation base. The light-emitting diode lamp of claim 1, wherein the sliding slot has an open end extending in a radial direction of the tube, and the width of the open end is smaller than the thickness of the sliding rail. The light-emitting diode lamp of claim 2, wherein the cross-sectional shape of the sliding groove and the sliding rail is a superior arc, and the diameter of the sliding rail is smaller than the width of the open end of the sliding slot. The light-emitting diode lamp of claim 1, wherein the surface of the heat dissipation base has a plurality of heat dissipation grooves extending along a radial direction of the lamp tube. Stretch. The illuminating diode lamp according to any one of the preceding claims, wherein the lampshade is made of a polycarbonate or a polyethylene methyl acrylate material.