WO2017065461A1

WO2017065461A1 - Lighting device

Info

Publication number: WO2017065461A1
Application number: PCT/KR2016/011260
Authority: WO
Inventors: 김지혜
Original assignee: 동부라이텍 주식회사
Priority date: 2015-10-12
Filing date: 2016-10-07
Publication date: 2017-04-20
Also published as: KR101764821B1; KR20170043063A

Abstract

A lighting device is disclosed. The lighting device of the present invention comprises: a light emitting module that includes a substrate and a plurality of LEDs coupled to the bottom surface of the substrate; and a transparent lens cover integrally formed with a lens that protrudes toward the LEDs and has concave light-condensing grooves in which the LEDs are received, wherein two or more LEDs are received in each light-condensing groove, and the lens and the light-condensing grooves extend along the direction in which the LEDs are arranged. According to the present invention, two or more LEDs are received together in the light-condensing groove of the lens so that it is possible to provide a high-power lighting device, which is compact and has a narrow beam angle, using LEDs with relatively low power consumption, and the lens and the light-condensing grooves are formed in a circular loop shape so that it is possible to provide a lighting device that can implement the same light distribution shape and efficiency irrespective of the number of LEDs.

Description

Lighting equipment

The present invention relates to a lighting device, and more particularly, to a lighting device provided with a lens in order to use a plurality of LEDs for lighting, and to focus the light of each LED.

Light emitting diodes (LEDs) are spotlighted compared to conventional incandescent lamps or fluorescent lamps due to their small size, long lifespan, and high energy efficiency. In recent years, light emitting diodes (LEDs) are used as light sources using electric energy. It is used a lot.

In this regard, Korean Patent No. 10-1437881 discloses a "light emitting diode illumination lens", and specifically, an arc-shaped refractive lens is formed on a cylindrical condensing groove ceiling surface, and is generated in an LED soldered to a substrate. In the light emitting diode illumination lens that irradiates light within a desired irradiation angle range, a high gloss bushing formed in a cylindrical shape is integrally installed on the inner surface of the condensing groove of the lens so that the light irradiated from the LED is not first refracted in the inner surface of the condensing groove. The inner surface of the bushing is reflected directly to the refractive lens side, thereby minimizing the leakage of light emitted from the light emitting diode to the lower surface, and reducing the light loss at the secondary refractive point inside the lens. After the first refraction, the light stem emitted from the lens is first refracted, and then the light is focused from the lens. The efficiency can be improved.

As described above, the lighting module using the light emitting diode is configured to include a lens. While the light collecting diode is formed in the lens and the light emitting diode is inserted into the light collecting groove, the light emitted from the light emitting diode is refracted and reflected by the lens, so that light is emitted. To diffuse or focus.

The lens disclosed in Korean Patent No. 10-1437881 is commonly referred to as a TIR lens.

On the other hand, the light emitting diodes include 0.2W and 0.5W middle power LEDs, 1W, 3W and 7W high power LEDs and 10W or more COB LEDs (chip on board LEDs). Among them, 0.2W and 0.5W middle power LEDs are used not only for LED lighting but also for displays such as LED TVs, and are becoming more competitive in terms of price / performance.

In the development of high ceiling and floodlight products, many products using middle power LED with high cost competitiveness have been developed, but most of them are wide-angle (90 ~ 120 °) models with wide angles of view. The medium-angle (60 °) model with narrow direct angle is in high demand. When using middle power LED for narrow ceiling, the bulky reflector should be used, especially when using multiple LEDs. There is a problem that increases. In addition, since each lens is made significantly larger than the LED, there is an inevitable problem that the size of the lighting device is inevitable as the number of LEDs increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high output lighting apparatus which is small in size and narrow in directing angle, while having a plurality of LEDs having low power consumption and a lens for condensing light of the plurality of LEDs.

The object is a light emitting module including a substrate and a plurality of LED (LED) coupled to the bottom surface of the substrate; And a lens cover formed in a transparent shape and protruding toward the LED, wherein the lens cover is integrally formed with a concave condensing groove to accommodate the LED, wherein the condensing groove receives two or more of the LEDs. The lens and the condensing groove are achieved by an illumination device characterized in that the length is made along the direction of the LED array.

The lens may include an inner surface that forms an inner surface of the condensing groove and faces the LED; A first refractive surface extending from one edge of the inner surface toward the substrate to form an inner wall surface of the condensing groove and along an arrangement direction of the plurality of lenses arranged inside the condensing groove; Located on the opposite side of the first refractive surface, extending from the other edge of the inner surface toward the substrate to form an inner wall surface of the condensing groove, and along the arrangement direction of the plurality of lenses arranged inside the condensing groove. Second refractive surface; A first reflective surface extending in a form bent from the first refractive surface to form an outer surface of the lens; And a first reflective surface extending in a form bent from the second refractive surface to form an outer surface of the lens.

In addition, the lens and the light collecting groove may be formed in the shape of a circular ring.

In addition, the arrangement of the plurality of LEDs, the shape of two or more circular rings which are concentric circles with each other, the lens may be provided with two or more concentric circles with each other.

Here, in the plurality of the lenses, the shape of the cross section may be made identical to each other.

In the lighting apparatus according to the present invention, the lens may be arranged in two rows in the condensing groove to be divided into an inner light source and an outer light source.

The inner light source and the outer light source may be symmetrical with respect to the lens axis passing through the center of the inner surface.

In addition, a plurality of LEDs accommodated in the condensing groove may be inclined so as not to be parallel to the lens axis.

In addition, the LEDs accommodated in the condensing groove may be determined in a power consumption range of 0.2W to 0.5W, respectively.

In addition, the entire width of the inner light source and the outer light source may be made to be equal to the width of the inner surface.

According to the present invention, since two or more LEDs are accommodated together in the condensing groove of the lens, it is possible to provide a high output lighting device that is small in size and narrow in directivity by using LEDs having relatively low power consumption, and has a lens and condensing groove. Since the circular ring is formed, it is possible to provide a lighting device capable of realizing the same light distribution shape and efficiency regardless of the number of LEDs.

1 is a perspective view showing a lighting apparatus according to an embodiment of the present invention,

FIG. 2 is an exploded perspective view showing the lighting apparatus shown in FIG. 1;

3 is a cross-sectional view showing the lighting apparatus shown in FIG.

4 is a bottom perspective view of some components shown in FIG. 2;

5 is a plan view showing the lens cover shown in FIG.

6 and 7 are cross-sectional views showing some components of a lighting apparatus according to another embodiment of the present invention.

Explanation of symbols on main parts of drawing

1: lighting device 10: light emitting module

11 substrate 12 through hole

13: light emitting element 20: main body

21: center assembly 21a: second inclined wall

22: peripheral coupling 22a: circular protrusion

23: connecting body 24: communication hole

30: heat radiation fin 31: vertical plate

31a: inner side plate 31b: outer side plate

31c: pinhole 32: horizontal plate

32a: round groove

40: lens cover 41: center inlet hole

42 lens 42a inner surface

42b: first refractive surface 42c: second refractive surface

42d: second reflective surface 42e: second reflective surface

43: cover connecting arm

44: condensing groove 45: exit surface

50: lower cover 51: first inclined portion

52: first peripheral inlet hole 60: upper cover

61: heat dissipation hole 70: converter housing

71: first inclined wall 80: shade

81: close contact 82: skirt

83: second inclined portion 84: second peripheral inlet hole

100: power supply

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

1 is a perspective view showing a lighting device 1 according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing the lighting device 1 shown in Figure 1, Figure 3 is shown in Figure 1 4 is a bottom perspective view of a part of the configuration shown in FIG. 2, FIG. 5 is a plan view showing the lens cover 40 shown in FIG. 2, and FIGS. 6 and 7. Is a cross-sectional view showing a part of the configuration of the lighting apparatus 1 according to another embodiment of the present invention.

The lighting device 1 according to the present invention may be coupled to a ceiling or the like to illuminate the bottom. Accordingly, the description of the lighting device 1 according to the present invention is based on the shape shown in FIG. 1. Explain it.

The lighting device 1 according to the present invention comprises a light emitting module 10 and a lens cover 40, in addition to the main body 20, heat radiation fins to achieve a more complete lighting device (1) 30 and the lower cover 50 may be formed. In addition, the upper cover 60, the converter housing 70 and the shade 80 may be further included.

The light emitting module 10 includes an LED 13 coupled as a light emitting unit, and includes a substrate 11, a through hole 12, and an LED 13 (LED, light emitting diode).

The substrate 11 may be formed in a flat plate shape in a horizontal direction, and may be formed in a polygonal shape including a quadrangle in plan view, but it is preferably formed in a circular shape.

The substrate 11 may be in the form of a single plate (eg, the substrate 11 may be in the form of a single circular plate), and two or more plates may be combined to form a single plate. (11) is a combination of two semi-circular plate can be made in the form of one circular plate)

The center of the substrate 11 is provided with a through hole 12 penetrated in the vertical direction, the light emitting module 10 preferably forms a symmetrical shape throughout the circumferential direction around the through hole 12. When the substrate 11 is formed in the shape of a disc, the through hole 12 is also preferably formed in the shape of a circular hole.

In the present invention, the longitudinal virtual axis passing through the center of the through hole 12 is referred to as the central axis s.

The

LEDs

13, 13 in, and 13 out are coupled to the bottom surface of the substrate 11 at the periphery of the through hole 12. The LEDs 13 provided in plurality are spaced apart from each other, and may be arranged while forming a predetermined pattern or maintaining a constant interval.

However, in the lighting device 1 according to the present invention, the LED 13 may be arranged to form a circle around the center (center axis (s)) of the substrate, thereby forming a circular ring (LB) form have.

In addition, the LED 13 may be arranged to form a plurality of circular rings (LB), wherein the circular ring (LB) formed by the arrangement of the LED 13 may form a concentric circle with each other.

A plurality of LEDs 13 forming one circular ring LB may be accommodated together in one condensing groove 44. At this time, each of the LEDs 13 accommodated in one condensing groove 44 has the same distance in the central axis (s), it is preferable that the separation distance between each other are made the same.

Alternatively, a plurality of LEDs 13 constituting two circular rings may be accommodated together in one condensing groove 44. That is, a plurality of LEDs 13in forming a relatively small circular ring and a plurality of LEDs 13out forming a relatively large circular ring may be accommodated together in one condensing groove. At this time, the LED that is accommodated together in one condensing groove 44 and forms a relatively small circular ring is referred to as the inner light source (13in), and the LED that forms a relatively large circular ring is referred to as the outer light source (13out). (See FIGS. 6 and 7)

The plurality of LEDs 13 accommodated together in one condensing groove 44 may form one group, and the number of such groups is equal to the number of lenses 42 formed in the lens cover 40. Is done.

The main body 20 is generally formed in a flat plate shape in a horizontal direction, and is coupled in a form in close contact with the upper side of the substrate 11. The main body 20 may form the center of the lighting device 1 according to the present invention, the light emitting module 10, the lens cover 40 and the lower cover 50 is coupled to the lower side of the main body 20 The heat dissipation fin 30, the converter housing 70, and the upper cover 60 are coupled to the upper side of the main body 20.

In order to couple the main body 20 and the light emitting module 10, a separate fastening means such as a bolt may be coupled, and the bolt may be screwed to the main body 20 through the substrate 11.

The main body 20 is preferably made of a material having a high thermal conductivity of metal in order to maintain the rigidity to stably support the light emitting module 10, and to effectively transfer heat generated from the light emitting module 10 side. For this purpose, the main body 20 may be made of aluminum or aluminum alloy.

A plurality of circular protrusions 22a protrude from the upper surface of the main body 20, and each circular protrusion 22a is formed in a hemispherical shape and is arranged at regular intervals along the circumferential direction with respect to the central axis s. do.

The main body 20 may be divided into a central assembly 21, a peripheral coupling 22, and a connecting body 23.

The central assembly 21 forms the center of the main body 20 and is located on the central axis s.

The center assembly 21 is formed in a circular shape in plan view, and a second inclined wall 21a inclined upward is formed on the bottom of the center assembly 21 toward the outside. The second inclined wall 21a is formed over the entire circumferential direction about the central axis s.

The second inclined wall 21a forms a part of the movement path (upper surface of the channel) when air flowing through the central inlet hole 41 of the lens cover 40 moves toward the heat dissipation fin 30, and the outside By forming a surface inclined upward as the direction, the air is guided to move naturally toward the heat radiation fin (30).

The peripheral coupling body 22 is spaced apart from the central coupling body 21 while surrounding the central coupling body 21, and is a part that is tightly coupled to the substrate 11. The circular protrusions 22a described above are formed on the peripheral assembly 22.

The connecting member 23 connects the central assembly 21 and the peripheral coupling 22 to each other, but connects both so that the communication hole 24 is provided between the central coupling 21 and the peripheral coupling 22. It is preferable that the linking body 23 is integrally formed with the central coupling body 21 and the peripheral coupling body 22.

In addition, the connecting member 23 may be provided in plurality, and may be repeatedly formed at regular intervals about the central axis s.

The communication hole 24 is in communication with the through hole 12 of the light emitting module 10 and the central inlet hole 41 of the lens cover 40, the air introduced into the lighting device 1 is a heat radiation fin (30) To get to the side.

The heat dissipation fins 30 are provided in plural from the main body 20 and arranged along the circumferential direction with respect to the through-hole 12.

The heat dissipation fin 30 is in close contact with the upper side of the main body 20, it is preferably made of a material with high thermal conductivity in order to effectively receive the heat generated from the main body 20 side (light emitting module 10 side). To this end, the heat dissipation fins 30 may also be made of aluminum or aluminum alloy.

The heat dissipation fins 30 may be divided into a pair of vertical plates 31 and horizontal plates 32 connecting them to each other. The horizontal plate 32 is a part in close contact with the upper surface of the main body 20, the vertical plate 31 is a portion that is bent upward from the end of the horizontal plate 32 to face in the vertical direction.

The horizontal plate 32 is formed with a circular groove 32a penetrated in the vertical direction, and the circular protrusion 22a of the main body 20 is inserted into the circular groove 32a.

Accordingly, when the heat dissipation fins 30 are coupled to the main body 20, the coupling positions of the heat dissipation fins 30 can be easily identified, and the spacing between the heat dissipation fins 30 can be easily maintained, as well as the heat dissipation fins 30. And a stable coupling between the main body 20 can be made.

The heat dissipation fin 30 includes an inner plate 31a and an outer plate 31b, and the inner plate 31a and the outer plate 31b form the vertical plate 31 described above. The inner plate 31a and the outer plate 31b form the same plane with each other, and the inner plate 31a is a portion located relatively inward in the lighting device 1 and the outer plate 31b is located relatively outside. Part.

As shown in Figure 3, the inner plate (31a) is made in the form of the height is lowered toward the central axis (s), the outer plate (31b) in the form of the height is increased toward the central axis (s). Is done. In particular, the upper edge of the inner plate (31a) is made to correspond to the inclination of the first inclined wall 71, it is preferable to be formed in a shape that maintains a slight distance from the first inclined wall (71), Accordingly, the air moving on the first inclined wall 71 can be more easily moved toward the heat dissipation fin 30.

In the lighting device 1 according to the present invention, each of the inner plate 31a and the outer plate 31b has a plurality of pinholes 31c formed therethrough, thereby smoothly communicating air in the space between the respective heat radiation fins 30. It can be done.

The upper cover 60 is formed to cover the heat dissipation fins 30, and a plurality of heat dissipation holes 61 are formed therethrough so that the space between the heat dissipation fins 30 can communicate with the outside.

The upper cover 60 has a shape corresponding to the size and shape of the combined heat dissipation fins 30 when all the heat dissipation fins 30 are combined. Specifically, the outer edge 62 of the upper cover 60 is formed to surround the outer end of the outer plate 31b, the inner edge 63 of the upper cover 60 is formed of the outer plate 31b Is formed in a shape surrounding the inner end, a plurality of ribs 64 are connected between the outer edge 62 and the inner edge 63 is formed a plurality of heat dissipation holes 61 on the upper cover (60). .

The converter housing 70 is positioned at the center of the plurality of heat dissipation fins 30 in a state where the plurality of heat dissipation fins 30 are assembled, and is formed in an open shape to accommodate the power supply device 100 therein. The power supply device 100 includes a converter and controls the electric energy supplied from the outside to be stably transmitted to the LED 13 of the light emitting module 10.

In the lighting device 1 according to the present invention, the converter housing 70 protects the power supply 100 and forms a passage through which air naturally moves. For this purpose, the converter housing 70 faces outward. The more the first inclined wall 71 inclined upward is formed. The first inclined wall 71 is formed over the entire circumferential direction with respect to the central axis s.

The first inclined wall 71 forms a part of the moving path (upper surface of the channel) when the air introduced through the communication hole 24 of the main body 20 moves toward the heat dissipation fin 30, and the outside of the first inclined wall 71 is formed. By making the surface inclined upward toward the direction, it guides the air to move naturally toward the heat dissipation fin 30 (in particular, the outer plate 31b side).

On the other hand, in the lighting device 1 according to the present invention, the outer end of the second inclined wall 21a is located inside or coincides with the inner end of the first inclined wall 71. Accordingly, the air introduced into the lighting device 1 through the surface formed by the second inclined wall 21a moves upward on the surface formed by the first inclined wall 71. By the natural movement of the air is made inside) is a rapid air movement toward the heat radiation fin (30).

The overall shape of the lens cover 40 is formed in a flat plate shape in the horizontal direction, is coupled to the light emitting module 10 from the bottom surface of the light emitting module 10, in particular to cover the LED (13). The lens cover 40 is made of a transparent material so that light of the LED 13 can be transmitted and irradiated, and in particular, may be made of PMMA (Polymethly Methacrylate) or PC (Polycarbonate).

A plurality of lenses 42 protruding toward the LED 13 are integrally formed in the lens cover 40, and a surface opposite to the LED 13 in the lens cover 40 forms a flat surface.

Each lens 42 protrudes toward the LED 13, and is formed in a concave shape in the center thereof (opening upward when the lighting device 1 is suspended from the ceiling) so that the LED 13 is formed therein. A light collecting groove 44 is provided.

In the lighting device 1 according to the present invention, the lens 42 does not have a form in which one LED is accommodated in one lens like a conventional lens (for example, a TIR lens). A plurality of LEDs 13 are accommodated together in one lens 42, and the lens 42 and the condenser groove 44 are long along the arrangement direction of the plurality of LEDs 13.

Specifically, the lens 42 may protrude from the surface of the lens cover 40 to form an elongated line, and the condensing groove 44 may be formed in an elongated valley shape along the longitudinal direction of the lens 42.

Preferably, the lens 42 and the light collecting groove 44 are formed in the shape of a circular ring LB. In the case where a plurality of lenses 42 are provided, the lenses 42 preferably form concentric circles with each other.

Specifically, the lens 42 includes the inner surface 42a, the first refractive surface 42b, the second refractive surface 42c, the first reflective surface 42d, the second reflective surface 42e, and the light exiting surface 45. It is made to include.

The inner surface 42a is a portion forming the inner surface of the condensing groove 44, and may be formed in a flat shape in the horizontal direction, or alternatively, may be formed in a convex shape toward the LED 13. When the lens 42 is disposed such that the entrance of the light collecting groove 44 is open toward the upper side, the inner surface 42a forms the bottom surface of the light collecting groove 44.

In the lighting device 1 according to the present invention, when the inner surface 42a forms a convex curved surface, the center portion protrudes toward the LED 13 and the edge portion forms a shape away from the LED 13, in each LED 13. The irradiated light is refracted at the inner surface 42a to narrow the directivity angle.

The first refracting surface 42b is a portion extending from one edge of the inner surface 42a toward the substrate 11 and forms an inner wall surface of the light collecting groove 44. When the light collecting groove 44 is formed in a circular valley shape, the first refraction surface 42b may form a wall surface closer to the central axis s of the inner wall surface of the light collecting groove 44.

The second refracting surface 42c is a portion extending from the other edge of the inner surface 42a toward the substrate 11 and forms another inner wall surface of the light collecting groove 44. When the condensing groove 44 is formed in a circular valley shape, the second refractive surface 42c may form a wall surface farther from the central axis s of the inner wall surface of the condensing groove 44. That is, the second refracting surface 42c forms the surface opposite to the first refracting surface 42b, and a plurality of LEDs 13 are positioned between the first refracting surface 42b and the second refracting surface 42c in a row.

The gap between the first refracting surface 42b and the second refracting surface 42c is formed in such a way that the gap is extended toward the LED 13 (the condensing groove 44 is formed toward the outside). Can be.

On the other hand, it is preferable that the space | interval between the 1st refractive surface 42b and the 2nd refractive surface 42c is made constant along the longitudinal direction (circumferential direction centering on the center axis s) of the lens 42.

The first refracting surface 42b causes the light irradiated from the LED 13 to be refracted toward the first reflecting surface 42d, and the second refracting surface 42c causes the light irradiated from the LED 13 to the second reflecting surface 42e. To bend toward).

The first reflective surface 42d is a portion extending from the first refracting surface 42b to be bent to form an outer surface protruding toward the LED 13, and forms an outer surface of the lens 13.

The first reflective surface 42d totally reflects the light incident into the lens 13 and is irradiated through the light exiting surface 45.

The second reflecting surface 42e extends in a form bent from the second refractive surface 42c to form an outer surface protruding toward the LED 13 and forms an outer surface of the lens 13.

The second reflective surface 42e totally reflects the light incident into the lens 13 and is irradiated through the light exiting surface 45.

That is, the second reflecting surface 42e forms the surface opposite to the first reflecting surface 42d, and the interval between the first reflecting surface 42d and the second reflecting surface 42e is directed toward the LED 13. The spacing can be made in a decreasing form.

On the other hand, it is preferable that the space | interval between the 1st reflecting surface 42d and the 2nd reflecting surface 42e is made constant along the longitudinal direction (circumferential direction centering on the center axis s) of the lens 42. Do.

The light exit surface 45 is a portion of the lens cover 40 that forms the opposite side of the inner surface 42a and forms a flat surface as a whole.

In the lighting device 1 according to the present invention, a plurality of LEDs 13 may be accommodated in one condensing groove 44 (a plurality of LEDs 13 are arranged in one row in one condensing groove 44). In particular, the circumferential direction (circumferential direction around the center axis (s)) is made of a constant cross-section of the condensing grooves 44, the plurality of LEDs 13 forming a group is accommodated together, each LED 13 It is possible to share the role of the lens 42 for each of the plurality of LEDs forming a group, and to increase the number of LEDs 13 without having to increase the number of lenses 42, so that the size It is possible to form the illuminating device 1 which is small in size and excellent in brightness.

In addition, it is possible to form the lighting device 1 capable of exhibiting sufficient brightness while using the middle power LED with low power consumption and excellent efficiency.

In addition, since the lens 42 and the light collecting groove 44 are formed in the shape of a circular ring (LB), it is possible to provide a lighting device capable of realizing the same light distribution shape and efficiency regardless of the quantity of the LEDs 13.

Meanwhile, as described above, a plurality of LEDs 13 are arranged in two rows in one condensing groove 44 in the lighting apparatus 1 according to the present invention, and may be divided into an inner light source 13in and an outer light source 13out. In this case, the inner light source 13in and the outer light source 13out may be formed symmetrically with respect to the lens axis x passing through the center of the inner surface 42a.

As such, a plurality of LEDs 13in and 13out are arranged in two rows in one condensing groove 44 to share the role of the lens 42 for each LED 13in and 13out, and the lens 42 The number of LEDs 13 can be increased without the need to increase the number of LEDs, and the size of the LEDs 13 can be formed while the size of the LEDs 13 can be increased.

At this time, the total width L1 of the inner light source 13in and the outer light source 13out provided in the condensing groove 44 is preferably equal to the width L2 of the inner surface 42a. That is, the length L1 connecting the inner light source 13in and the outer end of the outer light source 13out is equal to the width L2 of the inner surface 42a.

Accordingly, the light irradiated to the front from each LED 13 can be made to be incident to the inside of the lens 42 through the inner surface (42a) as much as possible, and eventually can be advantageously formed to form a narrow illumination device do.

In addition, in the present invention, a plurality of LEDs are refracted and reflected through one condensing groove 44, even when a low power LED such as a middle power LED having a power consumption of 0.2 W or 0.5 W is used, thereby forming a lighting device having excellent performance. You can do it.

On the other hand, in the lighting device 1 according to the present invention, the inner light source 13in and the outer light source 13out may be formed to face in a direction orthogonal to the surface of the substrate 11 (see FIG. 6), or Alternatively, the direction toward the inner light source 13in and the outer light source 13out accommodated in the condensing groove 44 may be inclined so as not to be parallel to the lens axis x passing through the center of the inner surface 42a. 7)

For example, the direction in which the inner light source 13in and the outer light source 13out face may be inclined toward the lens axis x, or may be inclined in the opposite direction.

By forming the inner light source 13in and the outer light source 13out disposed together in the condensing groove 44 of one lens 42 to face different directions, the beam angle control can be formed more variously. Accordingly, even when the LED 13 and the light collecting groove 44 having the same power consumption are used, it is possible to form the lighting device 1 which is more advantageous for the directivity angle control.

The central inlet hole 41 penetrates in the vertical direction in the center of the lens cover 40, and the central inlet hole 41 communicates with the through hole 12 and also communicates with the space between the heat dissipation fins 30. do.

The central inlet hole 41 forms an inlet of air flowing into the center of the lighting device 1, and the diameter of the central inlet hole 41 is made to match the inner diameter of the peripheral coupling body 22. In addition, the diameter of the central inlet hole 41 is preferably made of a size of 1/6 ~ 1/3 of the diameter of the lens cover 40 in order to provide a sufficient number of LEDs 13 and smooth air inflow.

A cover connecting arm 43 is formed on the lens cover 40, and the cover connecting arm 43 is formed to cross an inner edge of the lens cover 40 having a donut shape. The central inlet hole 41 is provided around the cover connecting arm 43, and the cover connecting arm 43 is coupled to the central assembly 21.

The diameter of the cover connecting arm 43 is preferably made to correspond to the bottom diameter of the central assembly 21, the cover connecting arm 43 and the central assembly 21 is coupled to each other using a separate fastening means such as bolts May be made.

The lower cover 50 is formed in a ring shape to support the lower edge of the lighting device 1. That is, the lower cover 50 has a wide open center, and when the light emitting module 10, the main body 20, and the like have a circular shape, the lower cover 50 also has a circular ring shape.

In the lighting device 1 according to the present invention, the lower cover 50 may be directly coupled to the main body 20 in a state where the outer edge of the lens cover 40 is interposed therein, and thus the main body ( 20) The lower light emitting module 10 and the lens cover 40 is more firmly coupled to the main body 20. The lower cover 50 and the main body 20 may be coupled to each other by a separate means such as a bolt.

The lower cover 50 is used as a means for supporting and coupling the lower end of the lighting device (1), and also as a means for allowing air to smoothly flow into the space between the heat radiation fins (30). To this end, the first peripheral inflow hole 52 is formed through the lower cover 50, and the first peripheral inflow hole 52 is formed over the entire lower cover 50, and is formed at regular intervals along the circumferential direction.

The lower cover 50 is inclined downward toward the center of the lighting device 1 at the portion where the first peripheral inflow hole 52 is formed, and this portion becomes the first inclined portion 51. That is, as shown in FIG. 3, the first inclined portion 51 is not formed in the horizontal direction or the vertical direction, but is formed in an inclined shape, and the first peripheral inflow hole (the first inclined portion 51) is formed on the first inclined portion 51. 52) is penetrated.

Air introduced into the lighting device 1 through the first peripheral inflow hole 52 flows in between the heat dissipation fins 30, and is then discharged to the outside to radiate heat.

Shade 80 forms the lowermost part in the lighting device 1 according to the present invention, extends downward from the lower cover 50 so that the light irradiated from the LED 13 of the light emitting module 10 is downward In addition to being irradiated with, it serves as a guide of the air (air for heat radiation) introduced into the lighting device (1).

To this end, the shade 80 is formed uniformly along the circumferential direction with respect to the central axis s, and is divided into a close contact portion 81 and a skirt portion 82.

The close contact portion 81 is formed in a ring shape to be in close contact with the lower cover 50, and the second peripheral inflow hole 84 is formed at a position corresponding to the first peripheral inflow hole 52. . It is preferable that the second peripheral inlet hole 84 has the same size and shape as the first peripheral inlet hole 52.

Accordingly, when the lower cover 50 and the shade 80 are coupled to each other, the first peripheral inflow hole 52 and the second peripheral inflow hole 84 coincide with and communicate with each other.

In addition, the close contact portion 81 is formed to be inclined downward toward the center of the lighting device 1 at the portion where the second peripheral inflow hole 84 is formed, and this portion becomes the second inclined portion 83. . That is, the second inclined portion 83 forms part of the contact portion 81, and as shown in FIG. 3, the second inclined portion 83 is not formed in the horizontal direction or the vertical direction, but in an inclined shape. The second peripheral inflow hole 84 is formed through the second inclined portion 83.

Preferably, the second inclined portion 83 and the first inclined portion 51 are inclined to the same extent in close contact with each other.

The skirt portion 82 extends downward from the outer end of the close contact portion 81, but the diameter of the skirt portion 82 extends downward to form an inclined surface.

On the inner side of the skirt portion 82, for effective illumination, a separate means having excellent reflectance may be combined or coated.

Air flowing into the shade 80 from the lower end of the skirt portion 82 moves upward through the inner wall surface of the skirt portion 82, and moves to the second inclined portion 83 while moving to the second peripheral inflow hole 84. Through) is introduced into the lighting device (1). At this time, in the lighting device 1 according to the present invention, the movement direction of air through the first peripheral inflow hole 52 and the second peripheral inflow hole 84 corresponds to the formation direction of the inner surface of the skirt portion 82. Therefore, it is possible to minimize the resistance during the inflow of air and to quickly move the air between the radiating fins 30, it is possible to provide a lighting device 1 excellent in heat dissipation efficiency.

As described above, the lighting device 1 according to the present invention is not only easy to assemble and maintain a stable coupling between the components, but also the lighting device through each of the central inlet hole 41 and the first peripheral inlet hole 52. (1) Not only the air is sufficiently introduced into the inside, but also the introduced air is quickly made to move to the space between the heat dissipation fins 30 to be discharged to the outside. It is possible to provide the device 1.

While specific embodiments of the invention have been described and illustrated above, it is to be understood that the invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the invention. It is self-evident to those who have. Therefore, such modifications or variations are not to be understood individually from the technical spirit or point of view of the present invention, the modified embodiments will belong to the claims of the present invention.

According to the lighting apparatus according to the present invention, since two or more LEDs are accommodated together in the condensing groove of the lens, it is possible to provide a high output lighting apparatus that is small in size and narrow in directivity by using LEDs having relatively low power consumption. Since the lens and the light collecting groove are formed in the shape of a circular ring, it is possible to provide a lighting device capable of realizing the same light distribution shape and efficiency regardless of the number of LEDs. This is an invention that is industrially applicable because it is not only sufficient marketability or sales potential of the applied device but also practically and clearly.

Claims

A light emitting module including a substrate and a plurality of LEDs coupled to a bottom surface of the substrate; And

The lens cover is formed in a transparent shape and protrudes toward the LED, and includes a lens cover integrally formed with a lens provided with a condensing concave groove to accommodate the LED.

At least two LEDs are accommodated in the condensing groove,

The lens and the light collecting groove is characterized in that the elongated along the direction of the arrangement of the LED.
The method of claim 1,

The lens,

An inner surface forming an inner surface of the condensing groove and facing the LED;

A first refractive surface extending from one edge of the inner surface toward the substrate to form an inner wall surface of the condensing groove and along an arrangement direction of the plurality of lenses arranged inside the condensing groove;

Located on the opposite side of the first refractive surface, extending from the other edge of the inner surface toward the substrate to form an inner wall surface of the condensing groove, and along the arrangement direction of the plurality of lenses arranged inside the condensing groove. Second refractive surface;

A first reflective surface extending in a form bent from the first refractive surface to form an outer surface of the lens; And

And a first reflective surface extending in a form bent from the second refractive surface to form an outer surface of the lens.
The method of claim 2,

The lens and the condensing groove is a lighting device, characterized in that formed in a circular ring shape.
The method of claim 3,

The arrangement of the plurality of LEDs, form a concentric ring of two or more concentric circles,

The lens is provided with two or more concentric circles with each other, characterized in that the illumination device.
The method of claim 4, wherein

In a plurality of the lenses, the shape of the cross section is characterized in that the same as each other.
The method according to any one of claims 1 to 5,

The lens is arranged in two rows in the light collecting groove, characterized in that divided into an inner light source and an outer light source.
The method of claim 6,

And the inner light source and the outer light source are symmetrical with respect to the lens axis passing through the center of the inner surface.
The method of claim 7, wherein

Illumination apparatus, characterized in that the direction in which the plurality of the LED accommodated in the condensing groove is inclined so as not to be parallel to the lens axis.
The method of claim 2,

The LEDs accommodated in the condensing groove, respectively, characterized in that the power consumption is determined in the range of 0.2W to 0.5W.
The method of claim 6,

The overall width of the inner light source and the outer light source is the same as the width of the inner surface.