Light emitting device for air vent of automobile

Abstract

The present invention comprises: an LED; a light guide; a diffusion plate; and an air vent housing, wherein at least one shielding protrusion having a receiving portion is formed to protrude from the rear of the air vent housing having the irradiation hole formed therethrough into which the diffusion plate is inserted to be fixed, wherein a bent extension portion is formed to extend from one side of the light guide such that a locking protrusion inserted into the receiving portion formed in the shielding protrusion protrudes from the front thereof and an inflow portion, through which the light generated from the LED is introduced, protrudes from the rear thereof.

Claims

1. A light emitting device for an air vent of an automobile, the light emitting device comprising: an LED for emitting light while being supplied with power from a battery, a light guide for guiding the light emitted from the LED, a diffusion plate for widely diffusing the light guided by the light guide, and an air vent housing having an irradiation hole formed therethrough to allow the light that is widely diffused by the diffusion plate to be irradiated to the outside, wherein at least one shielding protrusion having a receiving portion is formed to protrude from the rear of the air vent housing having the irradiation hole formed therethrough into which the diffusion plate is inserted to be fixed, wherein a bent extension portion is formed to extend from one side of the light guide such that a locking protrusion inserted into the receiving portion formed in the shielding protrusion protrudes from the front thereof and an inflow portion, through which the light emitted from the LED is introduced, protrudes from the rear thereof.

2. The light emitting device of claim 1, wherein the shielding protrusion is formed at a location on which the light emitted from the LED is concentrated.

3. The light emitting device of claim 1, wherein a refraction protrusion protruding outward is formed in the extension portion.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is an exploded perspective view illustrating a coupling state of a light emitting device for an air vent according to an embodiment.

(2) FIG. 2 is a perspective view illustrating an installation state of a light emitting device for an air vent according to an embodiment.

(3) FIG. 3 is a cross-sectional view taken along a line A-A of FIG. 2.

(4) FIG. 4 is an enlarged cross-sectional view of essential parts illustrating an installation state of a light emitting device for an air vent according to an embodiment.

(5) FIG. 5 is a rear perspective view illustrating the rear of an air vent housing of a light emitting device for an air vent according to an embodiment.

(6) FIG. 6 is an enlarged perspective view illustrating essential parts of an air vent housing of a light emitting device for an air vent according to an embodiment.

(7) FIG. 7 is a perspective view illustrating a light guide of a light emitting device for an air vent according to an embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

(8) Hereinafter, the technical configuration of the embodiments will be described in detail with reference to the accompanying drawings.

(9) FIG. 1 is an exploded perspective view illustrating a coupling state of a light emitting device for an air vent according to an embodiment, FIG. 2 is a perspective view illustrating an installation state of the light emitting device for an air vent according to an embodiment, FIG. 3 is a cross-sectional view taken along a line A-A of FIG. 2, FIG. 4 is an enlarged cross-sectional view of essential parts illustrating an installation state of the light emitting device for an air vent according to an embodiment, FIG. 5 is a rear perspective view illustrating the rear of an air vent housing of the light emitting device for an air vent according to an embodiment, FIG. 6 is an enlarged perspective view illustrating essential parts of the air vent housing of the light emitting device for an air vent according to an embodiment, and FIG. 7 is a perspective view illustrating a light guide of the light emitting device for an air vent according to an embodiment.

(10) As shown in FIGS. 1 through 4, a light emitting device for an air vent of an automobile includes an LED (100) for emitting light while being supplied with power from a battery (not shown), a light guide (200) for guiding the light emitted from the LED (100), a diffusion plate (300) for widely diffusing the light guided by the light guide (200), and an air vent housing (400) having an irradiation hole (410) formed therethrough to allow the light that is widely diffused by the diffusion plate (300) to be irradiated to the outside.

(11) Meanwhile, as shown in FIGS. 3 through 6, at least one shielding protrusion (420) having a receiving portion (421) is formed to protrude from the rear of the air vent housing (400) having the irradiation hole (410) formed therethrough into which the diffusion plate (300) is inserted to be fixed.

(12) Further, as shown in FIGS. 3, 4, and 7, a bent extension portion (210) is formed to extend from one side of the light guide (200) such that a locking protrusion (211) inserted into the receiving portion (421) formed in the shielding protrusion (420) protrudes from the front thereof and an inflow portion (212), through which the light emitted from the LED (100) is introduced, protrudes from the rear thereof.

(13) Meanwhile, the shielding protrusion (420) is formed at a location on which the light emitted from the LED (100) is concentrated such that the intensity of the light irradiated through the irradiation hole (410) may be adjusted by adjusting the illuminance of the LED (100).

(14) Further, a refraction protrusion (213) protruding outward is formed in the extension portion (210) such that the light emitted from the LED (100) may be irradiated at the same illuminance through the irradiation hole (410) while being refracted by the refraction protrusion (213).

(15) *In the configuration as described above, the diffusion plate (300) is inserted into the irradiation hole (410) to be fixed in a direction from the rear to the front of the air vent housing (400), and the light guide (200) is installed in the rear of the diffusion plate (300) inserted into the irradiation hole (410).

(16) In this example, the locking protrusion (211) formed to protrude from the front of the extension portion (210) of the light guide (200) is positioned the outer side of the shielding protrusion (420) formed in the rear of the air vent housing (400), or installed to be inserted into the receiving portion (421) formed between the shielding protrusion (420) and the shielding protrusion (420), such that even when the light emitted from the LED (100) is introduced into the locking protrusion (211), the shielding protrusion (420) prevents a leakage of the light into the irradiation hole (410), and thus the light emitted from the LED (100) deflecting toward one side of the irradiation hole (410) is not irradiated.

(17) After the light guide (200) is installed in the diffusion plate (300) as described above, the LED (100) for emitting light while being supplied with power from the battery is positioned to be in close contact with the end of the inflow portion (212) formed in the rear of the extension portion (210).

(18) Thus, the light emitted when the LED (100) is turned on while being supplied with power from the battery is introduced through the inflow portion (212) of the light guide (200) and moves while being primarily refracted by the refraction protrusion (213), and the light moving while being refracted by the refraction protrusion (213) moves to the locking protrusion (211) inserted into the receiving portion (421) formed in the shielding protrusion (420).

(19) In this example, even when a large quantity of the light emitted from the LED (100) is introduced into the locking protrusion (211), the light deflecting toward one side of the irradiation hole (410) is not irradiated by the inner side of the shielding protrusion (420) and the rear of the air vent housing (400) in which the irradiation hole (410) is not formed since the locking protrusion (211) of the extension portion (200) formed to be longer than the diffusion plate (300) inserted into the irradiation hole (410) is inserted into the receiving portion (421) formed in the shielding protrusion (420).

(20) Meanwhile, the light secondarily refracted by the locking protrusion (211) is induced toward the other side of the light guide (200) being in contact with the diffusion plate (300), and the light inducted toward the other side of the light guide (200) is widely diffused by the diffusion plate (300) and irradiated to the outside at the same illuminance through the irradiation hole (410) formed through the air vent housing (400).

(21) In this example, the illuminance at which the light is irradiated through the irradiation hole (410) is determined by adjusting the brightness of the LED (100) such that the light is irradiated at a uniform illuminance using the refraction of the light refracted by the locking protrusion (211) and the refraction protrusion (213).

DESCRIPTION OF REFERENCE NUMERALS

(22) 100: LED 200: Light guide 210: Extension portion 211: Locking protrusion 212: Inflow portion 213: Refraction protrusion 300: Diffusion plate 400: Air vent housing 410: Irradiation hole 420: Shielding protrusion 421: Receiving portion