JP2013105579A - Lampshade and lighting fixture using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lampshade capable of improving an output ratio and to provide a lighting fixture using the same.SOLUTION: A lighting fixture includes: a lamp holder; a lampshade; a housing space configured by the lamp holder and the lampshade; and an LED module. The lampshade includes a light-incident surface and light-output surface, wherein the light-incident surface is provided with a plurality of minute structures.

Description

  The present invention relates to a lighting fixture, and more particularly to a lamp shade and a lamp using the lamp shade.

  In order to protect a light emitting unit (for example, a light emitting diode) of a lamp, a transparent lamp shade is usually put around the light emitting unit. Since the entrance surface and the exit surface of the conventional lamp shade are all smooth, there is often a problem that a part of the light incident on the entrance surface of the lamp shade is totally reflected. Accordingly, the emission rate of the lamp is reduced and the loss of light quantity is increased.

  The present invention has been made in view of the conventional problems, and an object thereof is to provide a lamp shade capable of increasing the emission rate and a lamp using the same.

  In order to achieve the above object, a lamp shade according to the present invention includes an entrance surface and an exit surface, and the entrance surface is provided with a plurality of microstructures.

  In order to achieve the above object, a lamp according to the present invention includes a lamp holder, a lamp shade, a housing space composed of the lamp holder and the lamp shade, and an LED module. The lamp shade includes an entrance surface and an exit surface, and the entrance surface is provided with a plurality of fine structures.

  Compared with the prior art, the incident surface of the lamp shade of the present invention is provided with a plurality of fine structures. Thereby, the total reflectance of the light beam incident on the incident surface can be reduced, the emission rate of the entire lamp can be increased, and the loss of light amount can be reduced.

It is an assembly drawing of the lamp which concerns on embodiment of this invention. It is an exploded view of the lamp shown in FIG. It is sectional drawing of the lamp shown in FIG.

  As shown in FIGS. 1 to 3, the lamp according to the embodiment of the present invention includes a lamp holder 10, a power supply module 20, a radiator 30, an LED module 40, and a lamp shade 50.

  The lamp holder 10 includes a mounting portion 11 located at the lower part and a radiator 30 located at the upper part. The mounting portion 11 includes an insulating portion 12 and an electric plug 14. The electrical plug 14 is provided so as to surround the lower end of the insulating portion 12 and is electrically connected to an external power source to supply power to the lamp. The insulating part 12 is engaged with and connected to the radiator 30.

  The power supply module 20 is mounted in the radiator 30 and is electrically connected to the electric plug 14 of the mounting portion 11 and the LED module 40 to supply a driving voltage to the LED module 40.

The radiator 30 includes a substrate 32, a plurality of radiation fins 34, and a hollow column 36 (see FIG. 3). The substrate 32 is made of an insulating material having good thermal conductivity such as ceramic. Preferably, the ceramic is aluminum oxide (Al ₂ O ₃ ), aluminum nitride (AlN), or a mixture of both. The substrate 32 includes an upper surface and a back surface that are disposed to face each other. The upper surface of the substrate 32 is separated from the mounting portion 11. A mounting recess 321 for mounting the lamp shade 50 is provided around the LED module 40 on the upper surface of the substrate 32. Further, the substrate 32 is provided with at least one through hole 322 that penetrates the upper surface and the back surface. The LED module 40 and the power supply module 20 are electrically connected to each other through the through hole 322.

  The radiating fins 34 and the hollow column 36 are provided on the opposite side of the upper surface of the substrate 32. The plurality of heat radiating fins 34 extend along the axial direction of the hollow column body 36 and are disposed on the outer peripheral surface of the hollow column body 36 along the circumferential direction of the hollow column body 36. One end of the hollow column 36 that is separated from the substrate 32 is connected and fixed to the upper end of the insulating portion 12 of the mounting portion 11. Further, the power supply module 20 is accommodated in the hollow column 36 in order to reduce the volume of the entire lamp. In the embodiment according to the present invention, the radiating fins 34 and the hollow column 36 are integrally formed with the substrate 32, and the plurality of radiating fins 34, the hollow column 36 and the substrate 32 are made of the same material. Manufactured.

  The lamp shade 50 is made of a transparent material such as glass or plastic, is fixed to the upper part of the lamp holder 10, and forms a receiving space 60 in combination with the lamp holder 10. The lamp shade 50 includes a fixing portion 52 that is locked to the radiator 30 and a cover portion 54 that is fixed to the fixing portion 52. The fixing part 52 and the cover part 54 are each made by injection molding. An engaging portion 523 is provided at the bottom of the fixing portion 52, and a free end of the engaging portion 523 is bent in the horizontal direction to form a plurality of hooks 524. The engaging portion 523 extends into the mounting recess 321 of the radiator 30, and the plurality of hooks 524 are locked to a flange around the mounting recess 321. In the embodiment according to the present invention, the engaging portion 523 has a cylindrical shape. The number of the hooks 524 is four, and the hooks 524 are provided symmetrically at the bottom of the engaging portion 523. A first positioning member 521 that is a ring-shaped protrusion is provided on the opposite side of the engaging portion 523 of the fixing portion 52.

  In addition, the side wall of the engaging part 523 can be formed into a discontinuous sheet by providing the engaging part 523 with a plurality of notches. Accordingly, the number of the hooks 524 can be changed according to actual needs.

  The cover portion 54 has a hemispherical shape, and includes an incident surface 542 and an output surface 543 that are arranged to face each other. The incident surface 542 is located inside the cover portion 54 and faces the radiator 30. A plurality of microstructures 70 are formed on the incident surface 542 by fogging. The emission surface 543 is a smooth arc-shaped surface, and is located outside the cover portion 54 and directly contacts the outside. A second positioning member 541 that is a ring-shaped concave groove is formed at the connecting portion between the cover portion 54 and the fixed portion 52 in correspondence with the first positioning member 521. When the first positioning member 521 and the second positioning member 541 are engaged, the fixing portion 52 and the cover portion 54 are connected and fixed. Since the first positioning member 521 and the second positioning member 541 serve only for positioning, the fixing portion 52 and the cover portion 54 may be integrally connected by an ultrasonic welding technique. The fixing portion 52 and the cover portion 54 after ultrasonic welding can increase the strength of the lamp shade 50 as a whole. In addition, since the fixing portion 52 can be used in combination with the cover portion 54 having a different shape, it is possible to select a cover portion having various shapes such as a tapered shape or an elliptic shape according to consumer's preference. The attractiveness of the lamp shade 50 can be further increased.

  Further, the first positioning member 521 and the second positioning member 541 are not limited to a ring shape, and may be projections and concave grooves that are separated from each other.

  The LED module 40 is provided on the substrate 32 of the radiator 30 and is accommodated in the accommodation space 60. Since the LED module 40 faces the incident surface 542 of the lamp shade 50, the light emitted from the LED module 40 enters the lamp shade 50 through the incident surface 542 and passes through the emission surface 543. It is emitted to the outside world. Since the incident surface 542 is provided with a plurality of microstructures 70, the total reflectance of light rays on the inner surface of the lamp shade 50 is effectively reduced. Therefore, the emission rate of the entire lamp is increased and the loss of light quantity is also reduced.

  In the embodiment according to the present invention, the LED module 40 includes five light emitting diodes, but this number is not particularly limited. An electric circuit for electrically connecting to the LED module 40 is provided on the upper surface of the substrate 32 of the radiator 30. Preferably, the electric circuit is formed on the upper surface of the substrate 32 by electroplating.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or improvements can be made within the scope of the present invention. However, it goes without saying that it is included in the scope of the claims of the present invention.

DESCRIPTION OF SYMBOLS 10 Lamp holder 11 Mounting part 12 Insulation part 14 Electrical plug 20 Power supply module 30 Radiator 32 Substrate 34 Radiation fin 36 Hollow column body 40 LED module 50 Lamp shade 52 Fixing part 54 Cover part 60 Housing space 70 Microstructure 321 Mounting recessed part 322 Through Hole 521 First positioning member 523 Engaging portion 524 Hook 541 Second positioning member 542 Entrance surface 543 Exit surface

Claims (6)

  A lamp shade comprising an entrance surface and an exit surface, wherein the entrance surface is provided with a plurality of fine structures.   The lamp shade according to claim 1, wherein the exit surface is a smooth arcuate surface, and the plurality of fine structures are formed on the entrance surface by a fogging process.   The lamp shade includes a fixing part and a cover part manufactured separately from each other, the cover part covers the fixing part, and the incident surface and the emission surface are provided on the cover part. The lamp shade according to claim 1 or 2.   The lamp shade according to claim 3, wherein the fixing part and the cover part are each manufactured by injection molding, and both are integrally connected by an ultrasonic welding method. A lamp fixture comprising: a lamp holder; a lamp shade; a housing space composed of the lamp holder and the lamp shade; and an LED module.
The lamp shade according to any one of claims 1 to 4, wherein the lamp shade is the lamp shade. The lamp holder includes a fitting portion and a radiator that engage with each other, the lamp shade is connected to the radiator and combined with the radiator to form the housing space, and the LED module includes the radiator Attached to the top of the
The lamp according to claim 5, wherein the light emitted from the LED module is incident on the lamp shade through the incident surface and is emitted to the outside through the emission surface of the lamp shade.

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