TWI386596B - Led lamp - Google Patents

Description

LED light fixture

The invention relates to a luminaire, in particular to an LED luminaire.

Light-emitting diode (LED) is an efficient source of light, with environmental protection, high brightness, power saving, long life and many other characteristics. For this reason, traditional lamps are gradually being replaced by LED lamps. LEDs generate heat during operation. In a short period of time, the air with this heat is dissipated by the circulation between the air in the surrounding environment, but the heat dissipation method has limited effect. After a long time, the heat cannot be evacuated in time. Increasing the temperature of the LED seriously affects the luminous efficiency of the LED and the defect of the service life of the LED lamp.

In view of this, it is necessary to provide an LED lamp with good heat dissipation effect.

An LED lamp comprising a lamp holder and a circuit board electrically connected with a plurality of LEDs, the lamp holder being made of a heat dissipating material, comprising a fixing base, the fixing base comprising a receiving portion formed with a receiving cavity, a casing surrounding the receiving portion and a connection receiving A plurality of heat conducting arms of the outer casing and the outer heat conducting arms are formed with a ventilation groove, and the receiving cavity is for receiving the circuit board.

The above-mentioned LED lamp realizes the all-round conduction and circulation of heat through the heat conducting arm and the ventilation slot, and achieves a good heat dissipation effect.

Referring to FIG. 1 , the LED lamp 10 includes a lamp holder 20 , a lamp cover 30 and a support bar 40 . The socket 20 is made of a heat-dissipating heat-dissipating material, such as an aluminum alloy, which includes a disk-shaped holder 50 and a support post 60 projecting from the center of the holder 50. The support rod 40 is fixed to the support column 60, and the lamp cover 30 is fixed to the fixing base 50 to face away from One end of the support column 60.

Referring to FIG. 2, the LED lamp 10 further includes a heat dissipation plate 70, a circuit board 75 electrically connected with a plurality of LEDs (not shown), a transparent protection member 80, and a fixing frame 85.

The fixing base 50 includes a receiving portion 53, a housing 55 surrounding the housing portion, and a plurality of heat conducting arms 56 connecting the housing portion 53 and the housing 55. The outer casing 55 includes a cylindrical first heat dissipating portion 57 and a second heat dissipating portion 51 extending perpendicularly outward from an edge of the first heat dissipating portion 57. The heat conducting arm 56 is connected to the first heat radiating portion 57, and the lamp cover 30 is fixedly connected to the second heat radiating portion 51. The central portion of the accommodating portion 53 is recessed to form a receiving cavity 52. The heat dissipating plate 70 is received at the bottom of the accommodating cavity 52. The circuit board 75 is received in the accommodating cavity 52 and located above the heat dissipating plate 70. The heat dissipating plate 70 and the circuit board 75 can pass through the screw (see the figure). 5) Fixed to the accommodating portion 53. The heat radiated by the LED is conducted axially through the heat dissipation plate 70 to the outer surface of the accommodating portion 53 and the support post 60, thereby dissipating heat to the external environment. The heat conducting arms 56 are evenly spaced between the receiving portion 53 and the first heat dissipating portion 57 for conducting heat radiated from the LEDs to the first heat dissipating portion 57 through the heat dissipating plate 70, and the heat dissipating surface of the second heat dissipating portion 51 The heat accumulated by the first heat radiating portion 57 can be dissipated to the external environment more quickly. A ventilation groove 54 is formed between the adjacent two heat conducting arms 56 for circulating hot air and outside air in the LED lamp 10 to facilitate heat dissipation, and the surface of the heat conducting arm 56 also functions to dissipate heat.

A plurality of heat conducting arms 56 are formed with fixing holes 58. The protection member 80 is housed in the accommodating chamber 52. The fixing frame 85 is formed with an opening 82 having an area smaller than the area of the protective member 80. The fixing frame 85 extends along the edge of a plurality of fixing pieces 84. The fixing piece 84 is formed with a connecting hole 86 corresponding to the fixing hole. Referring to FIG. 4 together, a screw (not shown) is inserted into the fixing hole 58 through the connecting hole 86 to fix the fixing frame 85. The fixing seat 50 is fixed to the protection member 80 in the accommodating chamber 52.

Referring to FIG. 3, the accommodating portion 53 is formed with a heat sink 59 connecting the heat conducting arm 56 and the outer surface of the support post 60 away from the accommodating cavity 52. The heat sink 59 has a substantially rectangular pyramid shape. The fin 59 serves as a bridge between the support post 60 and the accommodating portion 53, so that the heat between the two is more uniform, and is also used to dissipate heat conducted to the support post 60 and the accommodating portion 53.

Referring to FIG. 5, the support post 60 is axially formed with a receiving hole 62 into which the support rod 40 is inserted. The support post 60 is radially formed with a mounting hole 64 for inserting the screw 66 to connect the support post 60 and the support. Rod 40. The support rod 40, the fixing base 50, the heat dissipation plate 70, and the circuit board 75 are all formed with a through hole coaxial with the accommodating hole 62 (not shown). The power supply line passes through the accommodating hole 62 and the through hole is electrically connected to the circuit board. 75 to supply power to the LED.

The LED lamp 10 is made of a lamp holder 20 made of a metal having good thermal conductivity, and is axially dissipated by the accommodating portion 53 and the support post 60, and is radially dissipated by the heat conducting arm 56 and the outer casing 55 to realize the all-round emission of heat; The heat sink 59 adjusts the uniformity of heat between the axial direction and the radial direction, and the ventilation groove 54 between the heat conducting arms 56 strengthens the circulation between the cold and hot air, so that the heat is better conducted and the heat is distributed to achieve good heat dissipation. effect.

10‧‧‧LED lamps

20‧‧‧ lamp holder

30‧‧‧shade

40‧‧‧Support rod

50‧‧‧ fixed seat

60‧‧‧Support column

70‧‧‧heat plate

75‧‧‧ boards

80‧‧‧protection

85‧‧‧Fixed frame

53‧‧‧ accommodating department

55‧‧‧Shell

56‧‧‧heat arm

57‧‧‧First heat sink

51‧‧‧second heat sink

52‧‧‧ accommodating chamber

54‧‧‧Ventilation trough

58‧‧‧Fixed holes

82‧‧‧ openings

84‧‧‧Fixed tablets

86‧‧‧connection hole

59‧‧‧ Heat sink

62‧‧‧ accommodating holes

64‧‧‧Installation holes

66‧‧‧screw

1 is a perspective view of an LED lamp in an embodiment.

2 is an exploded view of the LED lamp of FIG. 1 after the lamp cover is removed.

3 is an exploded view of another perspective of the LED lamp of FIG. 1 after the lamp cover is removed.

4 is a perspective view of the LED lamp of FIG. 1 with the lamp cover removed.

Figure 5 is a cross-sectional view of the LED lamp of Figure 4 taken along line IV-IV.

40‧‧‧Support rod

60‧‧‧Support column

70‧‧‧heat plate

75‧‧‧ boards

80‧‧‧protection

85‧‧‧Fixed frame

53‧‧‧ accommodating department

55‧‧‧Shell

56‧‧‧heat arm

57‧‧‧First heat sink

51‧‧‧second heat sink

52‧‧‧ accommodating chamber

54‧‧‧Ventilation trough

58‧‧‧Fixed holes

82‧‧‧ openings

84‧‧‧Fixed tablets

86‧‧‧connection hole

Claims (5)

An LED lamp comprising a lamp holder and a circuit board electrically connected with a plurality of LEDs, wherein the lamp holder is made of a heat dissipating material, and comprises a fixing base, the fixing base comprising a receiving portion formed with the receiving cavity and surrounding the receiving portion And a plurality of heat conducting arms connecting the receiving portion and the outer casing; the lamp socket further comprising a supporting column protruding from the fixing seat, the heat sink formed by the receiving portion facing away from the receiving cavity and being connected to the outer surface of the heat conducting arm and the supporting column; The receiving cavity is for accommodating the circuit board. The LED lamp of claim 1, wherein the outer casing comprises a sleeve-shaped first heat dissipation portion and a second heat dissipation portion extending perpendicularly outward from the first heat dissipation portion, the heat conduction arm and the first heat dissipation portion. connection. The LED lamp of claim 2, further comprising a lamp cover, wherein the lamp cover is fixed to the second heat dissipating portion. The LED lamp of claim 1, further comprising a heat dissipation plate housed in the accommodating cavity, the heat dissipation plate being disposed at a bottom of the accommodating cavity, and the circuit board being located above the heat dissipation plate. The LED lamp of claim 1, further comprising a transparent protection member and a fixing frame, wherein the fixing frame is formed with an opening, the area of the opening is smaller than the area of the protection member, the protection member is received in the receiving cavity, and the fixing frame is fixed. The fixing seat and the protective member are restrained in the receiving cavity.