TWI407051B - Led lamp - Google Patents

Abstract

An LED lamp includes a circuit board, a heat dissipating member, a threaded rod, a support post, and a base. The circuit board is fixed to the heat dissipating member. One end of the threaded rod is fixed to the circuit board and the heat dissipating member, and the opposite end of the threaded rod is fixed to one end of the support post. The opposite end of the support post is fixed to the base. The threaded rod, the support post and the base all are made of materials having good thermal conductivity. Heat generated in the circuit board is conducted directly to the threaded rod or is conducted indirectly to the threaded rod through the heat sink piece, and then is further conducted to the support post and the base through the threaded rod to make heat exchange with ambient air.

Description

LED light fixture

The invention relates to a lamp, in particular to an LED lamp which can enhance the heat dissipation effect and save the material of the heat sink.

In order to meet the aesthetic requirements of LED luminaires, LEDs are usually installed in an internal sealed space. However, when the LED works, a large amount of heat is generated, so it is usually necessary to provide a corresponding heat sink for the LED lamp to ensure the normal use of the LED. At present, the existing LED lamp heat dissipation generally adopts a fin heat dissipation structure, and the LED is directly soldered on the lamp board, and the light board is fixed on the fin heat dissipation shell, but the effect is not satisfactory, and the internal heat dissipation effect is poor, which affects the use of the LED lamp. The life span, and the volume of the entire LED lamp is also relatively large, the material consumption is high, and the production cost is high.

In view of this, it is necessary to provide an LED lamp that can enhance the heat dissipation effect and save the heat sink material.

An LED lamp comprises a lamp board, a heat sink, a support column and a base, and the lamp board is fixedly connected with the heat sink. The LED lamp further includes a connecting screw, the connecting screw is fixedly connected to the lamp board and the heat sink at one end, and the other end is fixedly connected to one end of the supporting column, and the other end of the supporting column is fixed on the base. The connecting screw, The support column and the base are respectively made of a material having good thermal conductivity, and the heat generated on the lamp plate is directly transmitted to the connecting screw through the heat radiating member, and then transmitted to the support column and the base through the connecting screw to exchange heat with the surrounding air. .

The LED lamp of the invention directly contacts the lamp plate and the heat sink by connecting the screw, so that the heat generated by the LED lamp can be transmitted to the support column and the base through the connecting screw for axial heat dissipation, and the heat dissipation is performed through the heat sink to realize heat dissipation. The all-round distribution enhances the heat dissipation effect, ensuring the normal illumination of the light source and prolonging the service life of the LED lamp. In addition, the heat dissipation structure of the LED lamp subtly utilizes the connecting screw to conduct heat, and uses the support column and the base to dissipate heat, thereby reducing the area of the heat sink and saving material.

10‧‧‧LED lamps

20‧‧‧shade

21‧‧‧Uplight cover

22‧‧‧ Lower shade

221‧‧‧ recess

222‧‧‧through hole

30‧‧‧ Heat sink

301‧‧‧Chassis

302‧‧‧ Department of heat dissipation

303‧‧‧ Round table

35‧‧‧Solution room

40‧‧‧light board

41‧‧‧Uplight board

42‧‧‧Lower light board

50‧‧‧Connecting screw

51‧‧‧ head

52‧‧‧ pole

53‧‧‧ nuts

60‧‧‧Support column

70‧‧‧Base

80‧‧‧ protective cover

90‧‧‧ wire

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

2 is a cross-sectional view of the LED lamp of FIG. 1 taken along the IV-IV direction.

3 is an exploded view of the LED luminaire of FIG. 1.

Referring to FIG. 1 and FIG. 2 simultaneously, the LED lamp 10 includes a lamp cover 20, a heat sink 30, a lamp board 40, a connecting screw 50, a support post 60 and a base 70. The lamp cover 20 and the lamp board 40 are respectively fixedly connected to the heat sink 30. One end of the connecting screw 50 is fixedly connected to the lamp board 40 and the heat sink 30, and the other end is fixedly connected to one end of the support post 60, and the other end of the support post 60 is fixed to On the disc-shaped base 70. In this embodiment, the connecting screw 50, the support post 60 and the base 70 are respectively made of a material having good thermal conductivity, and the heat generated on the lamp board 40 is directly or indirectly transmitted to the connecting screw 50 through the heat sink 30, and then connected. The screw 50 is conducted to the support column 60 and the bottom The seat 70 exchanges heat with the surrounding air.

The lampshade 20 has a hemispherical shape and includes an upper lamp cover 21 and a lower lamp cover 22 fixedly coupled to the upper lamp cover 21. Referring to FIG. 3 , in the embodiment, the top of the lower cover 22 is recessed away from the upper cover 21 to form a recessed portion 221 having a truncated cone shape, and a through hole 222 is formed in the center of the recess 221 .

The heat sink 30 is in the shape of a disk that cooperates with the recess 221 of the lower cover 22, and includes a chassis 301, a heat radiating portion 302 surrounding the chassis 301, and a hollow circular table 303 which is formed by projecting from the center of the chassis 301. When assembled, the top of the circular table 303 protrudes from the through hole 222, and the recess 221 of the lower cover 22 is received on the chassis 301 of the heat sink 30, thereby compactly fixing the lower cover 22 and the heat sink 30 together.

The light board 40 includes an upper light board 41 and a lower light board 42. The size of the upper light board 41 is matched with the top of the circular table 303 of the heat sink 30, and the size of the lower light board 42 is not larger than the size of the chassis 301 of the heat sink 30. Dimensions, and forming a through hole in the middle that matches the size of the opening at the bottom of the circular table 303. In the present embodiment, the upper lamp plate 41 is disposed on the outer side of the top of the circular table 303 of the heat sink 30, and the lower lamp plate 42 is disposed on the side of the chassis 301 away from the upper lamp plate 41. The upper lamp plate 41 and the lower lamp plate 42 are respectively mounted with light emitting diodes on one side away from the heat sink 30.

The LED lamp 10 further includes a transparent protective cover 80. The protective cover 80 has a disk shape, and the size of the opening is adapted to the size of the chassis of the heat sink 30. The protective cover 80 is buckled and fixed on the chassis of the heat sink 30. It is used to protect the light-emitting diodes on the lower light board 42. A heat dissipation chamber 35 is formed between the heat sink 30 and the transparent protective cover 80.

The connecting screw 50 is a hollow tubular structure for receiving the wires 90 of the LED lamp 10. The connecting screw 50 includes a head portion 51 and a rod portion 52. The head portion 51 is formed on the outer edge of the top end of the rod portion 52 and has an annular flange. The surface of the rod portion 52 is formed with an external thread for increasing the connecting screw 50 and The contact area of the air in the heat dissipation chamber 35. In the present embodiment, the heat sink 30, the upper lamp plate 41, and the transparent protective cover 80 are each formed with a coaxial through hole through which the rod portion 52 of the connecting screw 50 can pass. The end of the rod portion 52 of the connecting screw 50 passes through the upper plate 41, the heat sink 30, the lower lamp plate 42 and the through hole at the center of the protective cover 80 from top to bottom, and the head 51 of the connecting screw 50 abuts the upper light plate. 41. The nut 53 is engaged with the rod portion 52 of the connecting screw 50 from the side of the heat sink 30 away from the upper lamp plate 41 to fix the upper lamp plate 41 to the heat sink 30.

The support post 60 is a hollow tubular structure for accommodating the wire 90 of the LED lamp 10, and an end of the inner cavity is formed with an internal thread (not shown) for screwing the external thread of the end of the connecting screw 50. Pick up. The other end of the support post 60 is fixed to the base 70. The wire 90 of the LED lamp 10 passes through the support post 60 and the connecting screw 50 from the base 70, and is electrically connected to the upper lamp plate 41 and the lower lamp plate 42 to give the light emitting diode. Body power supply.

When the illumination of the LED lamp is turned on, the heat generated by the LEDs on the upper lamp plate 41 and the lower lamp plate 42 is transmitted to the heat dissipating portion 302 through the chassis 301 of the heat dissipating member 30 and the top of the truncated cone 303, thereby allowing heat to pass. The heat dissipating member 30 is radiated radially to the external environment. On the other hand, the light board 40 and the heat dissipating member 30 are directly contacted with the connecting screw 50 to be transmitted to the connecting screw 50, and then radiated to the heat dissipating chamber 35, and the heat dissipating chamber 35 is disposed. The heat is fully connected to the thread connecting the surface of the screw 50 It is inductively conducted into the connecting screw 50. The heat in the connecting screw 50 is axially conducted to the support post 60 and the base 70 for heat exchange with the surrounding air.

The LED lamp 10 of the present invention increases the contact area of the connecting screw 50 with the air in the heat dissipating chamber 35 by providing a screw structure on the surface of the connecting screw 50, improves the utilization ratio of the surface area of the connecting screw 50, and connects the screw 50 and the lamp board 40. And the heat sink 30 is in direct contact, so that the heat generated by the LED lamp 10 can be transmitted to the support column 60 and the base 70 through the connecting screw 50 for axial heat dissipation, and the heat is radiated by the heat sink 30 to realize the all-round emission of heat and enhance The heat dissipation effect ensures the normal illumination of the light source and prolongs the service life of the LED lamp 10. In addition, the heat dissipation structure subtly utilizes the connecting screw to conduct heat, and uses the support column and the base to dissipate heat, thereby reducing the area of the heat sink 30 and saving material.

It is to be understood by those skilled in the art that the above embodiments are only intended to illustrate the invention, and are not intended to limit the invention, as long as it is within the spirit of the invention Changes and modifications are intended to fall within the scope of the invention.

10‧‧‧LED lamps

20‧‧‧shade

21‧‧‧Uplight cover

22‧‧‧ Lower shade

30‧‧‧ Heat sink

35‧‧‧Solution room

40‧‧‧light board

50‧‧‧Connecting screw

60‧‧‧Support column

70‧‧‧Base

80‧‧‧ protective cover

90‧‧‧ wire

Claims (4)

An LED lamp comprises a lamp board, a heat sink, a transparent protective cover, a support column and a base. The lamp board is fixedly connected with the heat sink, and the protection cover is fixedly fastened on the heat sink and forms a heat dissipation chamber with the heat sink. The improvement is that the LED lamp further comprises a connecting screw, wherein one end of the connecting screw is fixedly connected with the lamp board and the heat sink, and the other end passes through the protective cover and is fixedly connected with one end of the supporting column, and the other end of the supporting column is fixed. The connecting screw includes a rod portion having an external thread formed on the surface of the rod portion for increasing the contact area between the connecting screw and the air in the heat dissipating chamber; the connecting screw, the supporting column and the base respectively have good thermal conductivity The material is made of heat, and the heat generated on the lamp board is directly transmitted to the connecting screw through the heat sink, and then transmitted to the support column and the base through the connecting screw to exchange heat with the surrounding air. The LED lamp of claim 1, wherein the heat sink comprises a chassis and a hollow truncated cone formed from a central protrusion of the chassis. The LED lamp of claim 2, wherein the lamp panel comprises an upper lamp plate disposed on a top outer side of the trough of the heat dissipating member and a side of the heat dissipating member disposed on a side away from the upper lamp plate The lower light board, the upper light board and the lower light board are respectively mounted with light emitting diodes on a side surface away from the heat sink. The LED lamp of claim 1, wherein the connecting screw and the supporting column are hollow tubular structures for accommodating the wires of the LED lamp.