WO2011050642A1 - Led street lamp - Google Patents

Abstract

An LED street lamp comprises at least one lamp bar (10) and a lamp frame (20) detachably connected with the lamp bars (10), wherein the lamp bars (10) are provided with: lamp boards (15) used for fixing LED lamps; heat radiating brackets (12) located above the lamp boards (15), whose length matches that of the lamp boards (15), and provided with heat radiating grooves (120); and angle adjusting devices (11) located at two ends of the heat radiating brackets (12) and connected with the lamp frame (20) so as to adjust the irradiating angle of the LED lamps. The LED street lamp can radiate heat better thereby prolonging the life of the LED street lamp, and can adjust the irradiating angle thereby improving the adjustability of the LED street lamp greatly.

Description

 LED street light

Technical field

The present invention relates to the field of lighting control technology, and more particularly to an LED street light.

Background technique

With the development and advancement of technology, LED street lamps have gradually replaced traditional street lamps with high energy consumption and short life. Generally speaking, the street lamp is located outdoors, affected by dust, ambient temperature and other factors, making heat dissipation an important factor affecting the life of LED street lamps. As we all know, the heat transmission methods mainly include conduction, radiation and convection. The existing LED street lamps are mostly snake head lamps. The heat dissipation method is mainly radiation. The main defects are as follows: due to the use of radiation heat dissipation, the heat dissipation efficiency is not good. When the use time is long, the surface of the lamp is covered with dust, the radiation capacity is greatly weakened, the junction temperature of the lamp rises sharply, and the life is sharply reduced; and the adjustability of the existing snake head lamp is not high, for example, if the street lamp power needs to be adjusted Or the angle of illumination, the need to replace the entire lamp holder or lamp, the cost is higher.

Summary of the invention

The main object of the present invention is to provide an LED street lamp with the aim of improving the heat dissipation efficiency of the LED street lamp, prolonging the life of the LED street lamp, and improving the adjustability of the existing LED street lamp.

The LED street lamp of the present invention comprises at least one light bar and a light stand detachably connected to the light bar, wherein the light bar is provided with:

a light board for fixing the LED light;

a heat dissipating bracket is disposed above the lamp board, and has a length adapted to the lamp board, and is provided with a heat dissipation slot;

An angle adjusting device is disposed at two ends of the heat dissipation bracket and connected to the light frame for adjusting an illumination angle of the LED light.

Preferably, the angle adjusting device comprises: the angle adjusting device comprises: an end cover, located at two ends of the heat dissipation bracket;

a connecting seat, one side is detachably connected to the lamp holder, and the other side is connected to the end cover;

A toothed structure is arranged between the end cover and the connecting seat for adjusting the illumination angle of the LED lamp.

Preferably, a spring is disposed between the connecting seat and the end cover.

Preferably, the LED lamp comprises at least two light bars, which are arranged in parallel between two and two, separated by 0 to 20 mm.

Preferably, the light bars are divided into two groups, and the two light bar assemblies are symmetrically arranged with respect to the axis of the lamp holder, and the two light bar groups have a spacing of 5 to 50 mm.

Preferably, the light bar assemblies are disposed at an angle to each other.

Preferably, the heat sink includes a lateral heat sink and/or a longitudinal heat sink.

Preferably, the heat dissipating bracket has a cross section in an "H" shape, and both side surfaces thereof are provided with longitudinal grooves.

Preferably, the light board is inserted at the lower end of the heat dissipation bracket, and a secondary optical reflector cup and a light exit cover are sequentially inserted under the light board for distributing light and closing the lower end of the heat dissipation bracket.

Preferably, the light bar further comprises a sealing member between the connecting seat and the two ends of the lower end of the heat dissipating bracket, forming a waterproof space with the light-emitting cover, the heat-dissipating bracket and the connecting seat.

Preferably, the lamp holder is a frame structure and is arranged in an open manner.

Preferably, the upper end of the lamp holder is provided with a cavity structure casing for fixing the power source, and the bottom side of the cavity structure casing is 30 to 100 mm away from the light bar.

Preferably, the cavity structure is provided with guide grooves on both sides of the housing for connecting with the street lamp fixing bracket.

Preferably, the cavity structure has a light pole mounting device for connecting to the light pole.

As can be seen from the above, the LED street lamp of the present invention comprises at least one light bar and a lamp holder detachably connected to the at least one light bar. The heat dissipation bracket is arranged above the light plate, which can convect heat dissipation, thereby improving the heat dissipation efficiency of the LED street lamp, thereby prolonging the The life of the LED street lamp; and the light bar is provided with an angle adjusting device, which can adjust the illumination angle of the lamp, and greatly improves the adjustability of the LED street lamp.

DRAWINGS

1 is a schematic exploded view of an LED street lamp according to an embodiment of the present invention;

2 is a schematic structural view of a light bar in the above embodiment;

3 is a schematic structural view of a heat dissipation bracket in the above embodiment;

Figure 4 is a cross-sectional structural view of the heat dissipating bracket of Figure 3;

Figure 5 is a schematic view showing the assembly structure of the light bar in one embodiment of the above embodiment;

6 is a schematic exploded view of an LED street lamp according to another embodiment of the present invention;

Figure 7 is a schematic structural view of the light bar of Figure 6;

Fig. 8 is a schematic view showing the assembly structure of a light bar in another embodiment of the above embodiment.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 shows the structure of an LED street lamp in one embodiment of the present invention. As shown in FIG. 1, the LED street lamp includes at least one light bar 10, a light stand 20, and a power source 30, wherein the light bar 10 is provided with at least an angle adjusting device 11, a heat dissipation bracket 12, and a light board 15 for fixing the LED light; The frame 20 is provided with a plurality of connecting holes 21 for connecting the light bar 10.

The angle adjusting device 11 is located at both ends of the heat dissipation bracket 12 and connected to the lamp holder 20, and can adjust the illumination angle of the LED lamp.

The heat dissipating bracket 12 is located above the lamp board 15 and has a length corresponding to the lamp board 15 and is provided with a heat dissipating slot 120.

The heat dissipating bracket 12 has a heat dissipating slot 120, and the strips 10 can have a spacing between the two. When the LED lamp is in operation, the surrounding air can be convected to better dissipate heat.

The above power supply device 30 may include a housing 31 that is a cavity structure. The two ends of the outer casing 31 are open and open, and the material thereof may be aluminum alloy or zinc alloy, and the thickness may be between 1 mm and 3 mm. Because the material is made of metal, the two ends are open, and when the LED lamp is working, it can be insulated and guided to better dissipate heat. A mounting groove is provided on both sides of the outer casing 31 for connecting with an external device; a light pole mounting device 33 is provided inside for connecting with the light pole, which can be made of soft steel wire and soft steel sheet, and can be applied to each The shape of the light pole.

The invention provides the above-mentioned light bar 10 and the lamp holder 20 in the LED street lamp, so that the LED lamp can better dissipate heat, thereby improving the heat dissipation efficiency of the LED street lamp, thereby prolonging the life of the LED street lamp; and, the working angle of the LED lamp can be adjusted. And the illumination brightness greatly improves the adjustability of the LED street light.

The above-described angle adjusting device 11 may include a toothed structure and is indexed by the toothed structure. As shown in FIG. 2, in an embodiment, the angle adjusting device 11 can include an end cover 13 and a connecting base 14; wherein the end cover 13 is located at two ends of the heat dissipating bracket 12, and is connected to the heat dissipating bracket 12 by screws, and one end is provided. There is a ring gear 131; a gear 142 is disposed in the connecting seat 14 and is matched with the ring gear 131 of the end cover 13 for adjusting the illumination angle of the LED lamp.

Referring to Figure 1, a plurality of light bars 10 can be placed in parallel in an LED lamp circuit to form a light bar assembly. When it is necessary to adjust the illumination brightness of the LED lamp, the plurality of light bars 10 can be detached or added to the lamp holder 20 from the lamp holder 20, or the corresponding switch of the light bar 10 can be set to realize the corresponding control of the single light bar 10, Therefore, the illumination brightness of the LED lamp is adjusted; if the illumination angle of the LED lamp needs to be adjusted, the ring gear 131 on the end cover 13 and the gear 142 on the connecting seat 14 can be used to rotate the light bar 10 by a certain angle, thereby LED lights illuminate different ranges.

The lamp holder 20 has a frame structure and is arranged in an open manner, and can be multi-faceted to ensure better heat dissipation when the lamp bar 10 is in operation.

The light bar 10 may further include a spring 22, a light plate 15 for fixing the LED lamp, a secondary optical reflector plate 16, a light exit cover 50, a nut 17, a sealing sheet 18, and a sealing ring 19.

The heat dissipation bracket 12 is located above the light board 15 and is provided with a heat dissipation slot 120. In an embodiment, the heat dissipation slot 120 includes a lateral heat dissipation slot 121 and/or a longitudinal heat dissipation slot 122. In the above embodiment, the heat dissipating bracket 12 may be an aluminum alloy profile, which is formed by a mold, and when the LED lamp is in operation, the heat dissipating through the lateral heat dissipating groove 121 and/or the longitudinal heat dissipating groove 122 can be better.

The end cap 13 can be fixed to both ends of the heat dissipating bracket 12 by screws 60, and an inner ring gear 131 is provided to fit the gear 142 on the connecting seat 14. The connecting seat 14 is further provided with a positioning end 141, which is correspondingly connected to the connecting hole 21. Referring to FIG. 2, a spring 22 is further disposed between one end of the connecting seat 14 in which the gear 142 is disposed and the end cover 13. The spring 22 and the connecting seat 14 can be placed into the end cap 13 in sequence, and then connected to the connecting seat 14 through the nut 17, and the spring 22 and the end cap 13 are connected to the connecting seat 14. In an embodiment, the connector block 14 is provided with an external thread that is adapted to the nut 17, and the spring 22 and the connector block 14 are positioned with the end cap 13 by connecting the two.

When the light bar 10 is connected to the lamp holder 20, the spring 22 can be biased to be compressed, and when the positioning end 141 corresponds to the position of the connecting hole 21, the spring 22 is released, so that the positioning end 141 corresponds to the connecting hole 21. connection. When it is necessary to adjust the illumination angle of the light bar 10, the spring 22 can also be forced to compress, the light bar 10 is detached from the lamp holder 20, and then the inner ring gear 131 is adjusted to adjust the light bar 10 to an angle. It is then connected to the lamp holder 20.

The secondary reflector cup plate 16 and the light exit cover 50 are sequentially located below the light board 15 and form a closed space with the heat dissipation bracket 12, and a sealing sheet 18 and a seal are further disposed between the two ends of the heat dissipation bracket 12 and the end cover 13. The ring 19 seals the enclosed space to prevent rainwater from entering the enclosed space when it rains.

As shown in FIG. 3, the heat dissipating bracket 12 can be disposed in an "H" shape in cross section, and has openings on the upper and lower sides to effectively dissipate heat. Grooves 123 may also be disposed on both sides of the "H" shaped heat dissipation bracket 12 to increase the heat dissipation area and dissipate heat more efficiently. The lower part of the heat dissipation bracket 12 is provided with a card slot 124 for holding the light board 15 and the light exit cover 50. The positioning groove 125 can increase the heat dissipation area for better heat dissipation, and can also be used to connect the sealing sheet 18 and the sealing ring 19. For example, in the above embodiment, a nut matched with the positioning groove 125 may be disposed, and the nut may be positioned by the positioning groove 125, and a connecting screw is disposed on the end cover 13 side, and the sealing piece 18 and the screw 18 and the nut are used. The sealing ring 19 is connected to the heat dissipation bracket 12.

4 shows the detailed structure of the above-described heat dissipation bracket 12, which includes a lateral heat dissipation groove 121 and a longitudinal heat dissipation groove 122, and a groove 123, a card groove 124, a positioning groove 125, and the like. In an embodiment, since the lateral heat dissipation groove 121 and the longitudinal heat dissipation groove 122 are provided, the LED lamp can be dissipated from a plurality of directions, thereby improving heat dissipation efficiency. In another embodiment, the heat dissipation groove 120 may also be disposed to include one of the lateral heat dissipation groove 121 or the longitudinal heat dissipation groove 122 according to the road condition. It should be noted that the shape of the lateral heat dissipation groove 121 and the longitudinal heat dissipation groove 122 in the present invention is various and should not be limited to the drawings shown in the specification.

As shown in FIG. 5, in order to better dissipate heat, after the light bar 10 is assembled with the lamp holder 20, the heat dissipation bracket 12 is separated from the bottom of the outer casing 31 by a distance D, and the light bar 10 can be operated by reasonably selecting the D value. Achieve better heat dissipation. For example, in one embodiment, the D value can be set to 30 mm; in another embodiment, the D value can be set to 70 mm; in yet another embodiment, the D value can be set to 100 mm.

The light bar 10 can be a plurality of, and the two can have a spacing between them, or can be adjacent to each other. The distance between the two light strips 10 can be set by a distance E. In one embodiment, the E value can be set to 0 mm, and the two light strips 10 are in close proximity; in another embodiment, the E value can be set to 10 mm; In the example, the E value can be set to 20 mm.

A plurality of light bars 10 can also be grouped. For example, the plurality of light bars 10 may be disposed in parallel with each other and divided into two groups, and the two light bar assemblies are symmetric with respect to the central axis of the lamp holder 20, and the two light bar assemblies may be disposed parallel to each other or at an angle to each other. In an embodiment, the light bar assemblies are parallel to each other and are separated by a distance G. The G value range can be set at 5-40mm, using the chimney effect, this value can ensure the maximum wind speed between the two sets of light bars, so that the temperature difference of the whole lamp is the smallest to achieve the purpose of uniform temperature. In one embodiment, the G value can be set to 5 mm; in another embodiment, the G value can be set to 20 mm; in yet another embodiment, the G value can be set to 40 mm.

Fig. 6 shows a detailed structure of an LED lamp in another embodiment of the present invention. As shown in FIG. 6, the lamp holder 20 is an open-type arrangement, and the multi-faceted ventilation can effectively ensure the heat dissipation of the light bar 10. Moreover, the lamp holder 20 is provided with a plurality of threaded holes 23 for connecting the light bar 10.

In an embodiment, the screw 40 can be connected to the screw hole 20 on the lamp holder 20 through the connecting hole 143 on the connecting base 14 to fix the connecting seat 14 and the lamp holder 20, thereby connecting the light bar 10 and the lamp holder. 20. When the light bar 10 needs to be detached from the lamp holder 20, the light bar 10 can be detached from the lamp holder 20 by separating the screw 40 from the screw hole 23.

In the above embodiment, a buckle structure may be disposed between the light bar 10 and the lamp holder 20 to engage the light bar 10 with the lamp holder 20. For example, a button body may be disposed on the connecting base 14 , and a card slot adapted to the button body is disposed on the lamp holder 20 , and the button body is connected to the card slot during assembly, thereby connecting the light bar 10 and the lamp holder 20, and when disassembled, The button body is separated from the buckle groove to disassemble the light bar 10 from the lamp holder 20. The buckle structure is widely used, and has a simple structure and is easy to disassemble. In the present invention, it can be set according to the weight of the light bar 10 and the like, and one or more can be set.

It should be noted that, in the above embodiment, the gear 142 in the angle adjusting device 11 may also be disposed on the end cover 13, and the ring gear 131 is disposed on the connecting seat 14. For example, as shown in FIG. 7, the connecting seat 14 is disposed in an "L" shape, and a ring gear 144 is disposed on a side surface thereof, and is matched with a gear 134 on the end cover 13, and the bottom surface is perpendicular to the side surface, and a connecting hole 143 is provided. It is fixedly connected to the lamp holder 20.

It is also possible to provide a ball positioning device on the end cover 13 and the connecting seat 14 to adjust the angle of the light bar 10. For example, in an embodiment, the connecting seat 14 is provided to be rotatable relative to the end cover 13, a plurality of small compression springs are disposed on the end cover 13, and a steel ball is disposed at the front end of the compression small spring, and the connecting seat 14 is disposed corresponding to the steel ball. The support socket, when rotated to the position corresponding to the steel ball and the support socket, compresses the small spring to extend, and the steel ball portion extends into the support socket to position the light bar 10.

A ratchet can also be provided on the end cover 13 and the connecting base 14 to adjust the indexing of the light bar 10. The structure of the ratchet is well known to those skilled in the art and will not be described herein.

The end cap 13 is connected to the connecting seat 14 by a nut 80, is rotatable relative to the connecting seat 14, and is fixedly connected to the heat dissipating bracket 12 by a screw 70. When the connecting seat 14 is fixedly connected to the lamp holder 20, the heat dissipating bracket 12 can be biased to drive the light board 15, and the reflecting board 16 and the light-emitting cover 50 rotate together to adjust the illumination angle of the LED lamp.

As shown in FIG. 8, the above-mentioned light bar 10 can be divided into two groups, and the central axis of the lamp holder 20 is an symmetrical axis and is disposed at an angle to each other.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims (14)

 An LED street lamp, comprising: at least one light bar and a lamp holder detachably connected to the light bar, wherein the light bar is provided with: a light board for fixing the LED light; a heat dissipating bracket is disposed above the lamp board, and has a length adapted to the lamp board, and is provided with a heat dissipation slot; An angle adjusting device is disposed at two ends of the heat dissipation bracket and connected to the light frame for adjusting an illumination angle of the LED light. The LED street lamp of claim 1 , wherein the angle adjusting device comprises: an end cover located at two ends of the heat dissipation bracket; a connecting seat, one side is detachably connected to the lamp holder, and the other side is connected to the end cover; A toothed structure is arranged between the end cover and the connecting seat for adjusting the illumination angle of the LED lamp. The LED street lamp of claim 2, wherein a spring is disposed between the connecting seat and the end cap. The LED street lamp of claim 2, comprising at least two light bars, the light bars being disposed in parallel between each other, 0 to 20 mm apart. The LED street lamp according to claim 4, wherein the light bar is divided into two groups, and the two light bar assemblies are symmetrically arranged with respect to the axis of the lamp holder, and the two light bar groups have a pitch of 5 to 50 mm therebetween. The LED street light according to claim 5, wherein the light bar assemblies are disposed at an angle to each other. The LED street lamp according to any one of claims 1 to 6, wherein the heat dissipation groove comprises a lateral heat dissipation groove and/or a longitudinal heat dissipation groove. The LED street lamp according to claim 7, wherein the heat dissipating bracket has an "H" shape in cross section, and longitudinal grooves are provided on both side surfaces thereof. The LED street lamp according to claim 8, wherein the lamp board is inserted at a lower end of the heat dissipation bracket, and a secondary optical reflector cup plate and a light exit cover are sequentially inserted under the light board for matching Light and close the lower end of the heat sink bracket. The LED street lamp according to claim 9, wherein the light bar further comprises a sealing member between the connecting seat and the two ends of the lower end of the heat dissipating bracket, and the light-emitting cover, the heat-dissipating bracket and the connecting seat Form a waterproof space. The LED street lamp according to claim 7, wherein the lamp holder is a frame structure and is disposed in an open manner. The LED street lamp according to claim 11, wherein the upper end of the lamp holder is provided with a cavity structure casing for fixing a power source, and the bottom side of the cavity structure casing is 30 to 100 mm away from the light bar. The LED street lamp of claim 12, wherein the cavity structure is provided with guide grooves on both sides of the housing for connecting with the street lamp fixing bracket. The LED street lamp of claim 12, wherein said cavity structure has a light pole mounting means for connecting to the light pole.

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