Lampshades and lamps using the same

[0035] See Figure 1 to Figure 3 A lamp provided by the embodiment of the present invention includes a lamp holder 10, a power module 20, a heat sink 30, a light emitting diode module 40, and a lamp shade 50.

[0036] The lamp holder 10 includes a receiving portion 11 at the bottom of the lamp holder 10 and a heat sink 30 at the top of the lamp holder 10. The receiving portion 11 includes an insulating portion 12 and an electrical connector 14. The electrical connector 14 is sleeved on the lower end of the insulating portion 12 and is used for electrical connection with an external power source to provide electrical energy required for the operation of the lamp. The insulating portion 12 is fixedly connected to the heat sink 30.

[0037] The power module 20 is disposed in the radiator 30 and is electrically connected to the electrical connector 14 on the receiving portion 11 and the light emitting diode module 40 to provide a driving voltage for the light emitting diode module 40.

[0038] The heat sink 30 includes a substrate 32, a plurality of heat dissipation fins 34 and a hollow cylinder 36. The substrate 32 includes an upper surface and a lower surface opposite to each other, and the upper surface is away from the receiving portion 11. The substrate 32 is made of a material with high thermal conductivity and electrical insulation, such as ceramics. Preferably, the ceramic is selected from alumina, aluminum nitride or a mixture of the two. A mounting groove 321 is formed on the upper surface of the substrate 32 surrounding the light emitting diode module 40, and the mounting groove 321 is used for mounting the lampshade 50. At least one through hole 322 penetrating the upper and lower surfaces is formed on the substrate 32 to facilitate the electrical connection between the LED module 40 and the power module 20.

[0039] The heat dissipation fins 34 and the hollow cylinder 36 are disposed on the lower surface of the substrate 32. The plurality of heat dissipation fins 34 are arranged around the hollow cylinder 36 and are connected to the outer surface of the hollow cylinder 36. One end of the hollow cylinder 36 away from the substrate 32 is fixedly connected to the upper end of the insulating portion 12 of the receiving portion 11. The power module 20 can be housed in the hollow cylinder 36, thereby reducing the volume of the entire lamp. In this embodiment, the plurality of heat dissipation fins 34 and the hollow cylinder 36 and the base plate 32 are integrally formed, and the plurality of heat dissipation fins 34, the hollow cylinder 36 and the base plate 32 are made of the same material.

[0040] The lampshade 50 is made of transparent materials, such as glass, plastic, etc. The lampshade 50 is located on the lamp holder 10 and connected with the lamp holder 10 to form a receiving space 60. The lampshade 50 includes a fixing portion 52 fixedly connected to the heat sink 30 and a cover portion 54 connected to the fixing portion 52. The fixing portion 52 and the covering portion 54 are made independently of each other by injection molding methods. The bottom end of the fixing portion 52 is provided with a joint end 523, and a plurality of lugs 524 are horizontally bent and extended from the joint end 523. The joint end 523 and the lug 524 are arranged in the installation groove 321 of the radiator 30, and the fixing method may be clamping, screw locking, and the like. In this embodiment, the joint end 523 has a circular ring shape, and the four lugs 524 are symmetrically arranged at the bottom end of the joint end 523. It is understandable that a notch can also be provided on the joint end 523 to make it a discontinuous sheet-like body, and the number of the lugs 524 can also be changed according to specific requirements. A first positioning structure 521 is provided on the end of the fixing portion 52 opposite to the joint end 523. The first positioning structure 521 in this embodiment is a ring-shaped protrusion.

[0041] The cover 54 is substantially in the shape of a hemispherical shell. The cover portion 54 of the lampshade 50 has a light-incident surface 542 and a light-emitting surface 543 oppositely disposed. The light incident surface 542 is located inside the cover portion 54 and faces the radiator 30. The light incident surface 542 is atomized to form several microstructures 70. The light output surface 543 is located outside the cover portion 54 and is in direct contact with the outside. The light output surface 543 smooth. The portion where the cover portion 54 and the fixing portion 52 are joined corresponds to the first positioning structure 521 to form a second positioning structure 541. In this embodiment, the second positioning structure 541 is a ring-shaped groove. The first and second positioning structures 521 and 541 engage with each other so as to be fixedly connected to the fixing portion 52 and the covering portion 54. Of course, the first and second positioning structures 521 and 541 can also only play a role of positioning, and then the fixed portion 52 and the cover portion 54 are connected together by ultrasonic welding technology. The fixed portion 52 and the covering portion 54 after ultrasonic welding can reach the strength of the integrally formed lampshade 50. The lampshade 50 is divided into two parts and made by injection molding. Compared with the traditional blow-molded lampshade, the yield of the lampshade 50 can be improved, thereby saving production cost. Since the fixing portion 52 can be adapted to the covering portion 54 of different shapes, more flexibility can be added when the finished product is assembled, and the covering portion 54 of different shapes can be manufactured according to the needs of consumers, such as a truncated cone shape, a football shape, etc. Therefore, the inventory risk of the lampshade 50 is reduced.

[0042] The above-mentioned first and second positioning structures 521 and 541 are not limited to the ring shape, and may also be in the form of block protrusions, block grooves and other alternative shapes that are separated from each other. In addition, the first positioning structure 521 is not limited to protrusions, and may be other structures such as grooves; similarly, the second positioning structure 541 matched with it may also be protrusions and other structures.

[0043] The light emitting diode module 40 is located on the heat sink 30 and is accommodated in the receiving space 60. The light emitting diode module 40 faces the light incident surface 542 of the lampshade 50, and the light emitted by the light emitting diode module 40 enters the lampshade 50 through the light incident surface 542 of the lampshade 50, and finally exits the lampshade 50 through the light emitting surface 543 of the lampshade 50. Since the light incident surface 542 of the lampshade 50 has a number of microstructures 70, the probability of total reflection of light directed to the light incident surface of the lampshade 50 is reduced, the light output efficiency of the entire lamp is improved, and light loss is reduced.

[0044] In this embodiment, the light emitting diode module 40 has five light emitting diodes. It can be understood that the number of light emitting diodes in the light emitting diode module 40 is not limited to this embodiment. Furthermore, the light emitting diode module 40 is mounted on the upper surface of the substrate 32, and a circuit is formed on the upper surface to be electrically connected to the light emitting diode module 40. Preferably, the circuit is formed on the upper surface by a plating method.