CN102367920A - LED (light emitting diode) wide angle floodlight - Google Patents

Abstract

The invention discloses an LED (light emitting diode) wide angle floodlight which comprises a lamp holder, a lamp bulb shell, a baseplate and multiple LED light sources, wherein the lamp bulb shell is fixed on the lamp holder, and the baseplate is fixed in the lamp bulb shell; and the baseplate comprises two fixed surfaces, the LED light sources are respectively distributed on the two fixed surfaces of the baseplate, and the baseplate is in hot connection with the lamp bulb shell. The LED wide angle floodlight provided by the invention has the advantages of simple structure, and high heat dissipation efficiency.

Description

LED wide angle lighting

technical field

The invention relates to an LED lighting lamp, in particular to an LED large-angle lighting lamp. the

Background technique

LED light sources have the advantages of high luminous efficiency, low heat generation, power saving and long life, so their applications are becoming more and more extensive. However, due to the solid light emitting characteristics of the LED light source, its light distribution angle is limited, generally less than 180 degrees. In order to improve this disadvantage and expand the light distribution angle, optical designers have proposed a method, which is to arrange LED light sources in different directions, such as arranging a circular array of light sources in a vertical direction. the

The Chinese Utility Model Patent No. 201020026276.4 applied on January 5, 2010 discloses a polyhedral LED lamp. The utility model comprises a polyhedron, the polyhedron is arranged in the bulb shell, and a plurality of LED light sources are arranged on each side and the top of the polyhedron. Although this method can achieve a larger light distribution angle, it also ensures that the top of the bulb is also illuminated, so that the overall light distribution of the bulb is uniform. But there are still following defects: 1. the production process of this method is more complicated; 2. because the LED light source of this LED lamp is more, the heat that distributes is also more, and the radiating area of lamps and lanterns in the present invention is less, and its radiating efficiency Low, resulting in the actual use process, the lamp may overheat and affect the service life of the lamp. the

Contents of the invention

In view of this, it is necessary to provide an LED large-angle lighting lamp with simple structure and high heat dissipation efficiency. the

The technical solution adopted by the present invention to solve its technical problems is:

An LED large-angle lighting lamp includes a lamp cap, a bulb shell, a substrate and a plurality of LED light sources. The bulb shell is fixed on the lamp cap, the substrate is fixed in the bulb shell, and the substrate includes two fixing surfaces. LED light sources are respectively distributed on two fixed surfaces of the substrate, and the substrate is thermally connected with the bulb shell. the

Compared with the prior art, the LED large-angle lighting lamp of the present invention can realize large-angle lighting by arranging the substrate in the bulb shell and setting these LED light sources on the two fixed surfaces of the substrate respectively; Thermally connecting the base plate with the bulb shell can effectively transfer the heat emitted by the LED light sources to the bulb shell and dissipate it through the bulb shell. This makes the LED large-angle lighting lamp of the present invention have a larger heat dissipation area compared with the prior art, thereby having the advantage of higher heat dissipation efficiency. the

Description of drawings

Fig. 1 is a perspective view of the LED large-angle lighting lamp in the first embodiment of the present invention. the

Fig. 2 is a three-dimensional exploded view of the LED large-angle lighting lamp shown in Fig. 1 . the

Fig. 3 is a three-dimensional exploded view of the LED large-angle lighting lamp shown in Fig. 1 along another direction. the

Fig. 4 is a sectional view along line A-A in Fig. 1 . the

Fig. 5 is a front view of the second embodiment of the LED large-angle lighting lamp of the present invention. the

Fig. 6 is a sectional view along line B-B in Fig. 5 . the

Fig. 7 is a front view of the third embodiment of the LED large-angle lighting lamp of the present invention. the

Fig. 8 is a sectional view along line C-C in Fig. 7 . the

Explanation of reference signs:

LED lamp-100, 100a, 100b; Lamp holder-10; Radiator-20; Bulb shell-30, 30a, 30b; Top cover-32, 32a, 32b; ; Bottom cover-36, 36a, 36b; Base plate-40; Fixed surface-42, 44; LED light source-50; the

Detailed ways

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

Please refer to FIG. 1 to FIG. 4 for the LED high-angle lighting lamp 100 according to the first embodiment of the present invention. the

Please refer to FIG. 1 to FIG. 3 , the LED large-angle lighting lamp 100 of the present invention mainly includes a lamp holder 10, a radiator 20, a bulb shell 30, a substrate 40, a plurality of LED light sources 50, a heat transfer column 60 and a reflection unit 70 . the

As shown in FIG. 1 , a heat sink 20 is disposed on the lamp holder 10 , and the bottom end of the bulb shell 30 is connected to the top end of the heat sink 20 and thermally connected thereto. The radiator 20 is fixed on the lamp holder 10 , so that the bulb shell is fixed on the lamp holder 10 . the

These LED light sources 50 are all surface-mounted LED light sources (SMD LEDs), and the light emitting angle of each LED light source 50 is 120°. the

Please refer to FIG. 1 to FIG. 4 , the bulb shell 30 is a bulb structure with an open lower end, which includes a top cover 32 , a cooling ring 34 and a bottom cover 36 . The top cover 32 is a circular shell structure, and the cooling ring 34 and the bottom cover 36 are circular shell structures. The top cover 32 , the cooling ring 34 and the bottom cover 36 are sequentially assembled from top to bottom to form the bulb housing 30 . The cooling ring 34 has a smooth structure and is made of aluminum alloy. The top cover 32 and the bottom cover 36 are made of transparent materials, and light-transmitting and scattering materials are disposed thereon. The ratio of the heights of the top cover 32 , the cooling ring 34 and the bottom cover 36 is 16:7:19. the

Please refer to FIG. 2 to FIG. 4 , the base plate 40 is disposed in the bulb shell 30 and integrally formed with the heat dissipation ring 34 to thermally connect the bulb shell 30 . The substrate 40 is a flat plate structure. In this example, the substrate 40 is set parallel to the lamp head 10 , and the light distribution at this time is ideal. The substrate 40 includes two fixing surfaces 42 , 44 , and the two fixing surfaces 42 , 44 are flatly attached to the upper and lower sides of the substrate 40 (as shown in FIG. 4 ). In this embodiment, the power of these LED light sources 50 is 0.3 watts, and these LED light sources 50 are respectively arranged on the two fixing surfaces 42 , 44 . The LED light sources 50 are electrically connected to the lamp holder 10 through wires (not shown) passing through the substrate 40 . Please refer to FIG. 2, eight LED light sources 50 are arranged on the fixed surface 42 at the top of the substrate 40; please refer to FIG. 3, twelve LED light sources 50 are arranged on the fixed surface 44 at the bottom of the substrate 40; the substrate 40 A plurality of LED light sources 50 on the two fixing surfaces 42, 44 are arranged at equal intervals in a circle. The ratio of the diameter of the circle formed by the eight LED light sources 50 on the fixed surface 42 to the diameter of the substrate 40 is 2/5 to 2/3; the reason why this ratio is set is because if the ratio is too small, that is, These LED light sources 50 are arranged biased towards the center of the substrate 40, which will make the periphery of the bulb case 30 too dark, while the top of the bulb case 30 is too bright; Then the top of the bulb shell 30 is too dark, while the periphery of the bulb shell 30 is too bright. Setting this ratio will make the light distribution of the bulb shell 30 even. And, because the light-emitting angle of single LED light source 50 is 120 °, by arranging them along the circumference, the light-emitting areas of multiple LED light sources can be overlapped, thereby increasing the light-emitting angle of the top cover 32 and the bottom cover 36, making it are close to 180° respectively. The position of the substrate 40 in the bulb shell 30 can be adjusted according to the required light distribution angle. Preferably, the ratio of the maximum distance from the top cover 32 to the substrate 40 to the maximum distance from the bottom cover 36 to the substrate 40 is 3/4˜4/5. the

Please refer to FIG. 4, the heat transfer column 60 is a hollow structure, one end of the heat transfer column 60 is thermally connected to the substrate 40, and the other end is fixed on the lamp cap 10 and thermally connected to the heat sink 20 of the lamp cap 10; the substrate 40 The LED light source 50 on the fixing surface 44 surrounds the heat transfer column 60 . the

Please refer to FIG. 2 to FIG. 4, the reflection unit 70 includes a reflection sleeve 74 and two reflection plates 72, 76, wherein: the reflection sleeve 74 is sleeved outside the heat transfer column 60; the reflection plate 72 is attached to On the fixed surface 44 of the base plate 40, in order to cooperate with the twelve LED light sources 50, the positions corresponding to the LED light sources 50 on the reflector 72 are provided with twelve relief holes (not shown in the accompanying drawings). ), the LED light source 50 is fixed in the relief hole, exposed in the relief hole and flush with or slightly higher than the surface of the reflection plate 72, so as not to block the light emitted by it; the reflection plate 76 is attached to On the end face of the top of the radiator 20 , the reflector 72 and the reflector 76 are oppositely disposed, and the reflector 74 is connected between the two reflectors 72 , 76 . the

When the LED large-angle lighting lamp 100 is working, the LED light sources 50 on the fixed surface 42 of the substrate 40 are energized and emit light. On the top cover 32 , since the top cover 32 is provided with a light-transmitting scattering material, the light distribution on the top cover 32 is uniform. The light emitted by the LED light source 50 located on the fixed surface 44 of the substrate 40 diverges downwards and shines on the bottom of the bottom cover 36 , on the reflector 72 and on the reflector 76 attached to the heat sink 20 . The reflector 72 reflects the light to the side of the bottom cover 36, and the reflector 76 not only reflects the light to the side of the bottom cover 36, but also reflects upward to its corresponding reflector 74, and then the reflector 74 turns the light downward Reflection makes the bottom of the bottom cover 36 also have a strong light distribution, which increases the luminous angle of the LED lamp 100. Since the bottom cover 36 is provided with a light-transmitting scattering material, the light distribution on the side of the bottom cover 36 is uniform. Since the top cover 32 and the bottom cover 36 are provided with light-transmitting scattering materials, although the heat dissipation ring 34 in this embodiment is an opaque aluminum part, it will not block light. When the LED light source 50 emits light, the light can still pass through the Under the effect of the light-transmitting scattering material on the top cover 32 and the bottom cover 36, it irradiates in all directions. As the light is emitted downwards by the top cover 32, it is also emitted upwards by the bottom cover 36. Seen from a distance, the light is not irradiated by the cooling ring. 34 to cover. In this way, the luminous angle of the LED large-angle lighting lamp 100 can reach 280° to 320° according to the American Energy Star standard. the

Since the cooling ring 34 and the base plate 40 are integrally formed, the base plate 40, the heat transfer column 60 and the heat sink 20 are thermally connected, so when the LED lamp 100 is energized to emit light, the heat generated by the LED light source 50 on the base plate 40 not only passes through the base plate 40, conducts heat in sequence, The heat column 60 is transmitted to the heat sink 20, and then the heat sink 20 dissipates heat to the outside air, and is also transmitted to the heat dissipation ring 34 through the substrate 40, and then the heat dissipation ring 34 dissipates heat to the outside air; due to the setting of the heat dissipation ring 34, the LED The heat dissipation area of the lamp 100 is higher in heat dissipation efficiency compared with the traditional heat dissipation method of the lamp which only uses the radiator to dissipate heat, which is beneficial to prolong the service life of the lamp. the

To sum up, in the LED large-angle lighting lamp 100 of the present invention, the base plate 40 is set in the bulb shell 30, and the LED light sources 50 are respectively set on the two fixing surfaces 42, 44 of the base plate 40, so that the The LED large-angle lighting lamp 100 can realize large-angle illumination; by thermally connecting the substrate 40 with the bulb shell 30, the heat emitted by these LED light sources 50 can be effectively transferred to the bulb shell 30, and passed through the bulb shell 30 Let it out. This makes the LED large-angle lighting lamp 100 of the present invention have a larger heat dissipation area compared with the prior art, thereby having the advantage of higher heat dissipation efficiency. the

It can be understood that if the heat dissipation ring 34 is transparent heat-conducting ceramics, there is no need to arrange light-transmitting scattering materials on the top cover 32 and the bottom cover 36 . The main purpose of setting the cooling ring 34 is to dissipate the heat generated by the LED light sources 50 outwards. If the light bulb housing 30 is made of light-transmitting and highly thermally conductive materials, such as glass, the base plate 40 and the bulb housing can be connected to each other. 30 are in contact with each other, and the interface between the two is filled with thermal paste, so as to realize the thermal connection between the substrate 40 and the bulb housing 30; in this way, the setting of the heat dissipation ring 34 can be omitted, and the structure can be simplified. In addition, the heat dissipation ring 34 can be a non-continuous annular structure, as long as it is thermally connected with the substrate 40 and disposed on the bulb housing 30, it can realize its heat dissipation function and reduce light shading. The substrate 40 can also be of a non-flat structure, such as a tetrahedron structure, so that the LED light source 50 can be mounted on more surfaces. The substrate 40 can also be arranged at other angles to the lamp holder 10 , for example, the substrate 40 can be perpendicular to the lamp holder 10 . the

5 to 6 illustrate the LED lamp 100a disclosed in the second embodiment of the present invention. Its main structure is the same as that of the first embodiment and will not be repeated here. The difference lies in the structure of the cooling ring 34a. A plurality of heat dissipation through holes 342a are opened on the peripheral surface of 34a, and the heat dissipation through holes 342a communicate the interior of the bulb housing 30a with the outside space, and can convect and dissipate the heat inside the bulb housing 30a to the outside, improving the heat dissipation efficiency. The number of these heat dissipation via holes 342a can also be appropriately increased or decreased according to actual conditions. the

7 to 8 illustrate the LED lamp 100b disclosed in the third embodiment of the present invention. Its main structure is the same as that of the first embodiment, and will not be repeated here. The difference lies in the heat dissipation ring in the first embodiment. 34 is a smooth smooth surface structure, and the heat dissipation ring 34b in this embodiment is composed of a plurality of heat dissipation fins 341 annularly combined, of course, the heat dissipation ring 34b can also be set as an uneven structure of other shapes. By arranging these multiple heat dissipation fins 341, the heat dissipation area of the heat dissipation ring 34b can be effectively increased. the

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection. the

Claims (11)

1. LED wide-angle illuminating lamp; Comprise lamp holder, bulb shell, substrate and a plurality of led light source; This bulb shell is fixed on this lamp holder, it is characterized in that: this substrate is fixed in this bulb shell, and this substrate comprises two stationary planes; Said led light source is distributed in respectively on two stationary planes of this substrate, this substrate and this bulb shell thermally coupled.

2. LED wide-angle illuminating lamp according to claim 1 is characterized in that: this substrate is a slab construction.

3. LED wide-angle illuminating lamp according to claim 1; It is characterized in that: this bulb shell comprises overhead guard, heat dissipating ring and end cover; Between this heat dissipating ring was located at overhead guard and should be covered at the end, this heat dissipating ring and this substrate were one-body molded, this overhead guard and should cover at the end and be provided with the printing opacity scattering material.

4. according to claim 2 or 3 described LED wide-angle illuminating lamps, it is characterized in that: this substrate is parallel with this lamp holder, and the ultimate range of this overhead guard to this substrate is 3/4～4/5 with the ratio of this end cover to ultimate range of this substrate.

5. according to claim 2 or 3 described LED wide-angle illuminating lamps, it is characterized in that: the ratio of this overhead guard, heat dissipating ring and end cover height is 16: 7: 19.

6. LED wide-angle illuminating lamp according to claim 1; It is characterized in that: the stationary plane that is positioned at this substrate top is provided with eight led light sources; Said eight led light source equi-spaced apart are circumferential arrangement, and the diameter of this circumference and the diameter ratio of this substrate are 2/5～2/3.

7. according to claim 1 or 6 described LED wide-angle illuminating lamps, it is characterized in that: the stationary plane that is positioned at this base plate bottom is provided with 12 led light sources, and said 12 led light source equi-spaced apart are circumferential arrangement.

8. LED wide-angle illuminating lamp according to claim 1 is characterized in that: also comprise heat transfer pole and radiator, this radiator is fixed on this lamp holder, and an end of this heat transfer pole is connected with this substrate heat, and the other end is connected with this radiator heat.

9. LED wide-angle illuminating lamp according to claim 8; It is characterized in that: also comprise reflector element; This reflector element comprises reflection cover and two reflecting plates, and this reflection is sheathed on outside this heat transfer pole, and these two reflecting plates are located at the end face of this substrate bottom surface and this radiator respectively.

10. LED wide-angle illuminating lamp according to claim 1 is characterized in that: this heat dissipating ring is provided with at least one heat radiation through hole, and said heat radiation through hole is communicated with the inside and the space outerpace of this bulb shell.

11. according to claim 1 or 10 described LED wide-angle illuminating lamps, it is characterized in that: this heat dissipating ring is provided with a plurality of fins.

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