Abstract:
The present invention provides a method for constructing an LED bulb ( 102 ) with high interchangeability and universality, an integral LED bulb ( 102 ) and a lamp. A silver paste printed circuit ( 4 ) is embedded on a heat conductive bracket ( 3 ) sintered by a nonmetal heat conductive material and provided with a cooling fin, and then an LED chip is welded on the silver paste printed circuit ( 4 ) or a drive chip is further welded thereon to form the LED bulb ( 102 ). The bulb may operate independently, so that the LED bulb ( 102 ), the lamp and a lighting control product are independently produced and used, which greatly reduces manufacturing links of LED lighting products, improves mass production and facilitates the industrialization of LED energy-saving lighting products.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a method for constructing an LED bulb with high interchangeability and universality, an integral LED bulb and a lamp, which involve the field of LED lighting technology. 
       BACKGROUND OF THE INVENTION 
       [0002]    As a new generation of lighting technology, LED semiconductor lighting has five energy-saving advantages incomparable by the existing other lighting technologies, such as high photoelectric conversion efficiency, easy control of light source direction, easy control of lighting time and manner, high light source color rendering property, and a high power factor under reasonable design, thus being warmly welcomed by worldwide investors and vigorously supported by the governments of all countries. The luminous efficiency of most current LED lamps may exceed 70 LM/W, thus having better energy saving advantages than the traditional energy saving lamps. The luminous efficiency of green LEDs may be up to 683 LM/W theoretically; the theoretical efficiency of white LED is also up to 182.45 LM/W, so the improvement space of LED lighting efficiency is huge. 
         [0003]    In the current design of high power LED lighting products, especially high power LED lamps, due to heat dissipation, when a high power LED lamp is assembled, an LED light module, a driving power supply and a lamp are integrally designed, namely such components as the LED light module, the driving power supply and the lamp must be produced collectively, thus forming a situation of “LED having lamp while lacking bulb”. This brings a series of fatal problems to the LED lighting products, such as high manufacturing cost, inconvenience for use, maintenance difficulty, and the like. First of all, national and even global uniform standardized production could not be achieved on manufacture, leading to numerous product specifications, few batches and high prices; second, the products of producers are varied, not universal, let alone interchangeable; third, the LED light module, the driving power supply, the lamp and the like need to be integrally detached for maintenance in the case of product failure, thus the maintenance is very inconvenient, and such defects as expanded failure, delayed maintenance and high maintenance cost and the like are very liable to form. These defects greatly restrict the popularization and use of LED lighting and are inherent problems in the popularization of the LED lighting products. 
       SUMMARY OF THE INVENTION 
       [0004]    The object of the present invention is to provide a method for constructing a LED bulb with high interchangeability and universality, an integral LED bulb and a lamp. The bulb constructed by the method in the present invention may operate independently, and the LED bulb, the lamp and a lighting control product are independently produced and used, thereby greatly reducing manufacturing links of LED lighting products, improving mass production and facilitating the industrialization of LED energy-saving lighting products. 
         [0005]    The technical solutions of the present invention are as follows: a method for constructing a universal LED bulb with high interchangeability and universality, including: embedding a silver paste printed circuit on a heat conductive bracket sintered by a nonmetal heat conductive material (alumina, aluminum nitride, boron nitride or the like may be adopted) and provided with a cooling fin, and then welding an LED chip, or further welding a drive chip on the silver paste printed circuit to form the LED bulb. 
         [0006]    In the above-mentioned method for constructing the LED bulb with high interchangeability and universality, fluorescent powder is spray coated on the LED chip, and transparent silica gel is covered thereon, namely, the traditional package manner, with no bulb inner cover being adopted; or the number of the LED chips is configured according to the proportion of blue and red lights necessary for plants, and only the transparent silica gel is covered on the welded LED chip for package, and the LED bulb may be applied to agricultural production lighting. 
         [0007]    In the above-mentioned method for constructing the LED bulb with high interchangeability and universality, a bulb inner cover is fixed to the heat conductive bracket by providing a slot, and the LED chip and the drive chip are wrapped in the bulb inner cover. 
         [0008]    In the foregoing method for constructing the universal LED bulb with high interchangeability and universality, a bulb outer cover or a lens snap ring and a lens are further fixed to the heat conductive bracket by providing the slot, and a flange structure for installation is further sintered on the heat conductive bracket; or the heat conductive bracket is fixed in the bulb outer cover provided with an installation flange; or the heat conductive bracket is fixed in a lens bracket provided with a hang lug, and the lens is provided at the lower end of the lens bracket. 
         [0009]    In the foregoing method for constructing the LED bulb with high interchangeability and universality, the bulb outer diameter D (i.e., the diameter of the flange of the heat conductive bracket) of the LED bulb and power W of the constructed LED bulb satisfy a relationship W=1.1812e 0.0361D , discrete numerical values are selected for D on the relationship curve W=1.1812e 0.0361D  to construct a plurality of LED bulbs with fixed bulb outer diameters D, in order to improve the interchangeability and universality of the LED bulbs. The discrete numerical values on the curve are selected for decreasing the number of the selected sizes while achieving high interchangeability and universality. 
         [0010]    In the foregoing method for constructing the universal LED bulb with high interchangeability and universality, on the relationship curve W=1.1812e 0.0361D , 20 mm used as the lower limit of the bulb outer diameter D and 130 mm used as the upper limit, the relationship curve is divided into 12 segments each of which is set to 10 mm to form limited bulb outer diameter specifications, and the interchangeability and universality of the LED bulbs are further improved by the small amount of bulb outer diameter specifications; 6 flange fixing holes on the heat conductive bracket with the flange are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the bulb outer diameter D; the diameter D 2  of an installation interface opening of the LED bulb on a lamp is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the bulb outer diameter D. The installation interface of the LED bulb includes a surface in contact with the LED bulb and a hole connected to the LED bulb, on the lamp. 
         [0011]    In the foregoing method for constructing the LED bulb with high interchangeability and universality, fluorescent powder is coated on an inner side of the bulb inner cover, and the LED chip is only packaged by the transparent silica gel, this structure ensures the fluorescent powder has better uniformity compared with that being directly sprayed on the chip, the fluorescent powder is away from the LED heating chip, the LED chip may operate at a relatively higher temperature, thereby perfecting the LED operation condition, effectively reducing the luminous decay of the LED bulb and ensuring a better LED light emission effect, and the dosage of the fluorescent powder is not increased to a larger extent; or the bulb inner cover is a concave inner cover made of an elastic material, the concave inner cover is of a concave structure in which transparent insulating heat conductive liquid is filled, a fluorescent material is provided in the transparent insulating heat conductive liquid, and the LED chip is packaged with no silica gel. In this structure, when the LED is electrified to generate heat, the transparent insulating heat conductive liquid is heated to flow to take away the heat of the LED chip, in order to exchange the heat with the radiator on a larger area, thus avoiding local high heat of the LED chip and the surrounding fluorescent powder in the traditional solution and effectively reducing the generation of LED luminous decay, when the transparent insulating heat conductive liquid is heated to expand, the concave inner cover protrudes outwards to increase the volume for receiving the expanded liquid, in order to avoid expanding of the liquid to result in ineffective seal of the inner cover. 
         [0012]    In the foregoing method for constructing the LED bulb with high interchangeability and universality, the slot is provided to the heat conductive bracket, the bulb outer cover is directly embedded in the slot by adhesion, or the lens snap ring clamps the lens and the lens snap ring is embedded in the slot by adhesion. 
         [0013]    An integral LED bulb achieving the foregoing method, including a heat conductive bracket provided with a cooling fin, wherein a silver paste printed circuit is embedded on the heat conductive bracket, and an LED chip is welded on the silver paste printed circuit, or a drive chip is further welded thereon. 
         [0014]    In the foregoing integral LED bulb, fluorescent powder is spray-coated on the LED chip, and transparent silica gel is covered outside the fluorescent powder; or only transparent silica gel is covered on the LED chip. 
         [0015]    In the foregoing integral LED bulb, a slot is provided to the heat conductive bracket, a bulb inner cover is embedded and fixed in the slot, and the bulb inner cover covers the LED chip and the drive chip. 
         [0016]    In the foregoing integral LED bulb, the edge of the heat conductive bracket is of an installation flange structure, a slot is further provided outside the bulb inner cover, a bulb outer cover or a lens snap ring and a lens are further embedded in the slot; or the heat conductive bracket is fixed in the bulb outer cover provided with an installation flange; or the heat conductive bracket is fixed in a lens bracket provided with a hang lug, and the lens is provided at the lower end of the lens bracket. 
         [0017]    In the foregoing integral LED bulb, only transparent silica gel for package is provided outside the LED chip, the bulb inner cover is provided outside the LED chip with the transparent silica gel and the drive chip, and fluorescent powder coating is provided to the inner layer of the bulb inner cover; or, the LED chip is packaged with no silica gel, a concave inner cover filled with transparent insulating heat conductive liquid is provided outside the LED chip, the LED chip is soaked in the transparent insulating heat conductive liquid, the fluorescent material is provided in the transparent insulating heat conductive liquid, and the concave inner cover is an elastic inner cover of a thin concave structure. 
         [0018]    In the foregoing integral LED bulb, the slot is provided to the heat conductive bracket, the bulb outer cover is directly embedded in the slot by adhesion, or the lens snap ring clamps the lens and the lens snap ring is embedded in the slot by adhesion. 
         [0019]    On another aspect, the present invention further provides a variety of lamps using the foregoing LED bulb. The lamp provided by the present invention is simple in structure, low in manufacturing cost, quick, cheap and convenient to install, use and maintain and is unlikely to expand failure, achieves independent production and use of the bulb, lamp and the lighting control product of the LED bulb, greatly reduces manufacturing links, achieves mass production and facilitates the application and the industrial scale of the LED energy-saving lighting products. 
         [0020]    An oval LED street lamp using an installation interface bracket structure, including an installation interface plate fixing bracket, wherein an installation interface plate is provided at the lower part of the installation interface plate fixing bracket, an installation interface is provided to the installation interface plate, and an LED bulb is provided to the installation interface; the installation interface plate fixing bracket is connected to a lamp post; a lamp housing is provided at the upper part of the installation interface plate fixing bracket, a lampshade is provided outside the installation interface plate, and the lamp housing matches with the lampshade to form an oval shape. 
         [0021]    In the foregoing oval LED street lamp using the installation interface bracket structure, a wire harness connector is provided to the installation interface plate fixing bracket, and the wire harness connector is used for connecting a plurality of LED bulbs to a power supply and a control circuit. 
         [0022]    In the foregoing oval LED street lamp using the installation interface bracket structure, the installation interface plate fixing bracket includes a sleeve, wherein the sleeve is used for installing the lamp post, wire harness connector brackets are provided at both sides of the sleeve, and the wire harness connector brackets are used for installing the wire harness connector; a ring plate is provided outside the sleeve and the wire harness connector brackets, and the ring plate is used for fixedly connecting the installation interface plate to the installation interface plate fixing bracket. 
         [0023]    In the foregoing oval LED street lamp using the installation interface bracket structure, a light penetration hole and a water drainage hole are provided on the lamp cover; the installation interface includes a surface in contact with the LED bulb and a hole connected to the LED bulb, on the installation interface plate. 
         [0024]    In the foregoing oval LED street lamp using the installation interface bracket structure, a radiator interface opening and 6 flange fixing holes are provided to the installation interface of the installation interface plate, the flange fixing holes are used for fixing an LED bulb, and the radiator interface opening is used for enabling the LED bulb to penetrate through the installation interface; the flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb  102 ; the diameter D 2  of the radiator interface opening on the installation interface is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the outer diameter D of the bulb. 
         [0025]    An LED street lamp using a lamp housing as an installation interface bracket structure includes the lamp housing punch formed by sheet metal via a stamping process, an installation interface is provided to the lamp housing, an LED bulb is provided to the installation interface, the lamp housing is fixed to a lamp post by a lamp post fixing element, and a decorative cover is provided to the lamp housing. 
         [0026]    The foregoing LED street lamp using the lamp housing as the installation interface bracket structure further includes a wire harness connector, wherein the wire harness connector is provided to the decorative cover, and the wire harness connector is used for connecting a plurality of LED bulbs to a power supply and a control circuit. 
         [0027]    In the foregoing LED street lamp using the lamp housing as the installation interface bracket structure, the lamp housing is elliptic, edgefolds for reinforcing the structural strength are provided at the inner and outer edges of the lamp housing, and the installation interface includes a surface in contact with the LED bulb and a hole connected to the LED bulb, on the lamp housing. 
         [0028]    In the foregoing LED street lamp using the lamp housing as the installation interface bracket structure, the lamp post fixing element includes a lamp post fixing bracket, a lamp post fixing bracket bolt and a reinforcing plate, wherein the lamp post fixing bracket and the reinforcing plate are provided at the upper and lower sides of the lamp housing, and the lamp housing is fixed to the lamp post through the lamp post fixing bracket and the reinforcing plate. 
         [0029]    In the foregoing oval street lamp using the lamp housing as the installation interface bracket structure, a radiator interface opening and 6 flange fixing holes are provided to the installation interface of the lamp housing, the flange fixing holes are used for fixing the LED bulb, and the radiator interface opening is used for enabling the LED bulb to penetrate through the installation interface; the flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb; the diameter D 2  of the radiator interface opening on the installation interface is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the outer diameter D of the bulb. 
         [0030]    An LED street lamp using a lamp housing as an installation interface bracket structure includes a lamp housing punch-formed by sheet metal; the lamp housing includes a bracket panel folded to multiple pieces, an installation interface is provided to the bracket panel, and an LED bulb is provided to the installation interface; the lamp housing is fixed to a lamp post through a lamp post fixing element. 
         [0031]    The foregoing LED street lamp using the lamp housing as the installation interface bracket structure further includes a wire harness connector, wherein the wire harness connector is provided to the lamp housing, and the wire harness connector is used for connecting a plurality of LED bulbs to a power supply and a control circuit. 
         [0032]    In the foregoing LED street lamp using the lamp housing as the installation interface bracket structure, an edgefold for reinforcing the structural strength is provided at the edge of the lamp housing, and the installation interface includes a surface in contact with the LED bulb and a hole connected to the LED bulb, on the lamp housing; a lamp post fixing hole used for connecting the lamp post is formed in the upper part of the lamp post fixing bracket. 
         [0033]    In the foregoing LED street lamp using the lamp housing as the installation interface bracket structure, the lamp post fixing element includes a lamp post fixing bracket, a lamp post fixing bracket bolt and a reinforcing plate, wherein the lamp post fixing bracket and the reinforcing plate are provided at the upper and lower sides of the lamp housing, and the lamp housing is fixed to the lamp post through the lamp post fixing bracket and the reinforcing plate; the lamp housing includes three bracket panels which are folded to form an angle, a planar bracket is provided at the lower part of the lamp post fixing bracket, and the lamp post fixing bracket is fixed to the bracket panel at the center of the lamp housing from the upper side or the lower side of the lamp housing; or, the lamp housing includes two bracket panels which are folded to form an angle, the lamp post fixing bracket is fixed to the bracket panels provided to form the angle from the upper side or the lower side of the lamp housing, and a triangular bracket is provided at the lower part of the lamp post fixing bracket and is inverted V-shaped or V-shaped. 
         [0034]    In the foregoing LED street lamp using the lamp housing as the installation interface bracket structure, 6 flange fixing holes and a radiator interface opening are provided to the installation interface, the flange fixing holes are used for fixing the LED bulb, and the radiator interface opening is used for enabling the LED bulb to penetrate through the installation interface; the 6 flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb; the diameter D 2  of the radiator interface opening is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the outer diameter D of the bulb. 
         [0035]    An LED street lamp using an extrusion type installation interface bracket structure, including a metal extrusion type installation interface bracket, wherein the extrusion type installation interface bracket is fixed to a lamp post; the extrusion type installation interface bracket includes a lamp post fixing sleeve, bracket panels are provided on both sides of the lamp post fixing sleeve, and an installation interface used for installing an LED bulb is provided to each bracket panel; the LED bulb is installed on the installation interface. 
         [0036]    The foregoing LED street lamp using the extrusion type installation interface bracket structure further includes a wire harness connector, wherein the wire harness connector is provided to the lamp post fixing sleeve, and the wire harness connector is used for connecting a plurality of LED bulbs to a power supply and a control circuit. 
         [0037]    In the foregoing LED street lamp using the extrusion type installation interface bracket structure, in the extrusion type installation interface bracket, the bracket panels on both sides are provided to form an angle; a lamp post seal head is provided at one end of the lamp post fixing sleeve, and the other end of the lamp post fixing sleeve is fixed to the lamp post through a lamp post fixing screw; the installation interface includes a surface in contact with the LED bulb and a hole connected to the LED bulb, on the bracket panels. 
         [0038]    In the foregoing LED street lamp using the extrusion type installation interface bracket structure, a radiator interface opening and 6 flange fixing holes are provided to the installation interface, the flange fixing holes are used for fixing the LED bulb, and the radiator interface opening is used for enabling the LED bulb to penetrate through the installation interface; the 6 flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb; the diameter D 2  of the radiator interface opening is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting the margin corresponding to the diameter D 1  from the outer diameter D of the bulb. 
         [0039]    Compared with the prior art, in the present invention, the heat conductive bracket with the cooling fin is directly sintered by the nonmetal heat conductive material, and the LED silver paste printed circuit is directly embedded in the heat conductive bracket, such that the structure of the constructed LED bulb is simpler and more compact, and the heat dissipation of the LED is faster. Due to the arrangement of the slot on the heat conductive bracket, the lampshade is convenient to install and the water resistance is good. Moreover, the installation structure of the bulb may be directly sintered on the heat conductive bracket, or the heat conductive bracket is installed in a lampshade assembly with an installation structure. The integral LED bulb in the present invention is used for establishing the lamp in a simple, easy, flexible and variable manner, in this way, the bulb, the lamp and the lighting control product of the LED bulb are independently produced and used, thereby greatly reducing manufacturing links of LED lighting products, improving mass production and facilitating the industrialization of LED energy-saving lighting products. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0040]      FIG. 1  is a schematic diagram of an outline of a lens solution of a first LED bulb in the present invention; 
           [0041]      FIG. 2  is a schematic diagram of an outline of a bulb outer cover solution of the first LED bulb in the present invention; 
           [0042]      FIG. 3  is a schematic diagram of a structure of the lens solution of the first LED bulb in the present invention; 
           [0043]      FIG. 4  is a schematic diagram of a structure of the bulb outer cover solution of the first LED bulb in the present invention; 
           [0044]      FIG. 5  is a schematic diagram of a structure of an embedding circuit of a heat conductive bracket in the present invention; 
           [0045]      FIG. 6  is a schematic diagram of a structure of a heat conductive bracket with a bulb inner cover in the present invention; 
           [0046]      FIG. 7  is a schematic diagram of a structure of a heat conductive bracket with a concave inner cover in the present invention; 
           [0047]      FIG. 8  is a sectional view of a concave inner cover in the present invention; 
           [0048]      FIG. 9  is a schematic diagram of a structure of a second LED bulb in the present invention; 
           [0049]      FIG. 10  is a schematic diagram of a structure of a third LED bulb in the present invention; 
           [0050]      FIG. 11  is a schematic diagram of an outline of the second LED bulb in the present invention; 
           [0051]      FIG. 12  is a schematic diagram of an outline of the third LED bulb in the present invention; 
           [0052]      FIG. 15  is a schematic diagram of a size of a bulb in an embodiment of the present invention; 
           [0053]      FIG. 16  is a schematic diagram of a structure of embodiment 1 in the present invention; 
           [0054]      FIG. 17  is an external view of embodiment 1 of the present invention; 
           [0055]      FIG. 18  is a structure diagram of an installation interface plate fixing bracket in embodiment 1 of the present invention; 
           [0056]      FIG. 19  is a schematic diagram of a structure of embodiment 2 in the present invention; 
           [0057]      FIG. 20  is a vertical external view of embodiment 2 in the present invention; 
           [0058]      FIG. 21  is an overlooking external view of embodiment 2 in the present invention; 
           [0059]      FIG. 22  is a projection drawing of a lamp post fixing bracket in embodiment 2 of the present invention; 
           [0060]      FIG. 23  is a vertical external view of embodiment 2 in the present invention; 
           [0061]      FIG. 24  is an overlooking external view of embodiment 2 in the present invention; 
           [0062]      FIG. 26  is a vertical external view of embodiment 3 in the present invention; 
           [0063]      FIG. 27  is an overlooking external view of embodiment 3 in the present invention; 
           [0064]      FIG. 28  is an overlooking external view when bracket panels on both sides are provided downwards to form an angle in embodiment 3 of the present invention; 
           [0065]      FIG. 29  is an overlooking external view when two bracket panels are adopted in embodiment 3 of the present invention; 
           [0066]      FIG. 30  is an overlooking external view when two bracket panels are provided downwards to form an angle in embodiment 3 of the present invention; 
           [0067]      FIG. 31  is a projection drawing of a lamp post fixing bracket in embodiment 3 of the present invention; 
           [0068]      FIG. 32  is a projection drawing of a lamp post fixing bracket when bracket panels on both sides are provided downwards to form an angle in embodiment 3 of the present invention; 
           [0069]      FIG. 33  is a projection drawing of a lamp post fixing bracket when two bracket panels are adopted in embodiment 3 of the present invention; 
           [0070]      FIG. 34  is a projection drawing of a lamp post fixing bracket when two bracket panels are provided downwards to form an angle in embodiment 3 of the present invention; 
           [0071]      FIG. 35  is a schematic diagram of a structure of embodiment 4 in the present invention; 
           [0072]      FIG. 36  is a vertical external view of embodiment 4 in the present invention; 
           [0073]      FIG. 37  is a vertical external view when bracket panels are provided downwards to form an angle in embodiment 4 of the present invention; 
           [0074]      FIG. 38  is a vertical external view when bracket panels are connected and are provided upwards to form an angle in embodiment 4 of the present invention; 
           [0075]      FIG. 39  is a vertical external view when bracket panels are connected and are provided downwards to form an angle in embodiment 4 of the present invention; 
           [0076]      FIG. 40  is a projection drawing of a lamp post fixing bracket in embodiment 4 of the present invention; 
           [0077]      FIG. 41  is a projection drawing of a lamp post fixing bracket when bracket panels are provided downwards to form an angle in embodiment 4 of the present invention; 
           [0078]      FIG. 42  is a projection drawing of a lamp post fixing bracket when bracket panels are connected and are provided upwards to form an angle in embodiment 4 of the present invention; 
           [0079]      FIG. 43  is a projection drawing of a lamp post fixing bracket when bracket panels are connected and are provided downwards to form an angle in embodiment 4 of the present invention; 
           [0080]      FIG. 44  is a schematic diagram of an installation interface on the lamp in an embodiment of the present invention. 
       
    
    
       [0081]    Reference numerals:  3 —heat conductive bracket,  4 —silver paste printed circuit,  6 —bulb inner cover,  61 —concave inner cover,  7 —lens,  8 —lens snap ring,  71 —lens bracket,  9 —bulb outer cover,  91 —bulb outer cover with installation flange,  10 A—waterproof joint with cable,  11 A—cable fixing head,  18 —slot,  22 —connector fixing hole,  101 —lamp housing,  102 —LED bulb in the present invention,  103 —ceiling lamp head plate, and  105 —bulb fixing screw. 
       DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0082]    The present invention will be further illustrated below in conjunction with accompanying drawings and embodiments, which are not used as a basis of limiting the present invention. 
       EMBODIMENTS 
       [0083]    A method for constructing an LED bulb with high interchangeability and universality, including: embedding a silver paste printed circuit on a heat conductive bracket sintered by a nonmetal heat conductive material (alumina, aluminum nitride, boron nitride or the like may be adopted) and provided with a cooling fin, and then welding an LED chip (including other related drive chip elements) on the silver paste printed circuit to form the LED bulb. A bulb inner cover is fixed to the heat conductive bracket by providing a slot, and the LED chip and the drive chip are wrapped in the bulb inner cover. A bulb outer cover or a lens is further fixed to the heat conductive bracket by providing the slot, and a flange structure for installation is further sintered on the heat conductive bracket; or the heat conductive bracket is fixed in the bulb outer cover provided with an installation flange; or the heat conductive bracket is fixed in a lens bracket provided with a hang lug, and the lens is provided at the lower end of the lens bracket. Fluorescent powder is coated on the inner side of the bulb inner cover, and the LED chip is only packaged with the transparent silica gel; or the bulb inner cover is a concave inner cover made of an elastic material, the concave inner cover is of a concave structure in which transparent insulating heat conductive liquid is filled, a fluorescent material is provided in the transparent insulating heat conductive liquid, and the LED chip is packaged with no silica gel. The LED chip may also be packaged by adopting a traditional package solution, namely, fluorescent powder is spray coated on the LED chip and transparent silica gel is covered thereon, and no bulb inner cover is used. When the present invention is applied to agricultural production lighting, the number of the LED chips is configured according to the proportion of blue and red lights necessary for plants, and only the transparent silica gel is covered on the welded LED chip for package. The slot is provided to the heat conductive bracket, the bulb outer cover is directly embedded in the slot by adhesion, or the lens snap ring clamps the lens and the lens snap ring is embedded in the slot by adhesion. 
         [0084]    A first LED bulb: 
         [0085]    an integral LED bulb for implementing the foregoing method, including a heat conductive bracket  3  provided with a cooling fin, wherein a silver paste printed circuit  4  is embedded on the heat conductive bracket  3 , and an LED chip and a related drive chip are welded on the silver paste printed circuit  4 , and a waterproof joint  10 A with a cable is fixed to the heat conductive bracket  31  through a cable fixing head  11 A, as shown in  FIG. 5 . A slot  18  is provided to the heat conductive bracket  3 , a bulb inner cover  6  is embedded and fixed in the slot  18 , and the bulb inner cover  6  covers the LED chip and the drive chip, as shown in  FIG. 6 . The edge of the heat conductive bracket  3  is of an installation flange structure and is fixed by a bulb fixing screw  105 , the slot  18  is further provided outside the bulb inner cover  6 , and a bulb outer cover  9  or a lens snap ring  8  and a lens  7  are further embedded in the slot  18 . The slot  18  is provided to the heat conductive bracket  3 , the bulb outer cover  9  is directly embedded in the slot by adhesion, as shown in  FIG. 4 , or the lens snap ring  8  clamps the lens  7  and the lens snap ring  8  is embedded in the slot by adhesion, as shown in  FIG. 3 . Transparent silica gel for package is provided outside the LED chip, the bulb inner cover  6  is provided only outside the LED chip with the transparent silica gel, and fluorescent powder coating is provided to the inner layer of the bulb inner cover  6 ; or, the LED chip is packaged with no silica gel, a concave inner cover  61  filled with transparent insulating heat conductive liquid is provided outside the LED chip, as shown in  FIG. 7 , the LED chip is soaked in the transparent insulating heat conductive liquid, the fluorescent material is provided in the transparent insulating heat conductive liquid, and the concave inner cover  61  is an elastic inner cover of a thin concave structure, as shown in  FIG. 8 . The LED chip may also be packaged by adopting a traditional package solution, namely, fluorescent powder is spray coated on the LED chip and transparent silica gel is covered thereon, and no bulb inner cover is used. When the present invention is applied to agricultural production lighting, the number of the LED chips is configured according to the proportion of blue and red lights necessary for plants, and only the transparent silica gel is covered on the welded LED chip for package. 
         [0086]    A second LED bulb: 
         [0087]    an integral LED bulb for implementing the foregoing method, including a heat conductive bracket  3  provided with a cooling fin, wherein a silver paste printed circuit  4  is embedded on the heat conductive bracket  3 , and an LED chip is welded on the silver paste printed circuit  4 , or a drive chip is further welded thereon, and a waterproof joint  10 A with a cable is fixed to a connector fixing hole  22  of the heat conductive bracket  3  through a cable fixing head  11 A, as shown in  FIG. 5 . A slot  18  is provided to the heat conductive bracket  3 , a bulb inner cover  6  is fixed to the slot in an embedding manner, and the bulb inner cover  6  covers the LED chip and the drive chip, as shown in  FIG. 6 . The heat conductive bracket  3  is fixed in the bulb outer cover  91  with an installation flange, as shown in  FIG. 9 . Only transparent silica gel for package is provided outside the LED chip, the bulb inner cover  6  is provided outside the LED chip with the transparent silica gel, and fluorescent powder coating is provided to the inner layer of the bulb inner cover  6 ; or, the LED chip is packaged with no silica gel, and a concave inner cover  61  filled with transparent insulating heat conductive liquid is provided outside the LED chip, as shown in  FIG. 7 . The LED chip is soaked in the transparent insulating heat conductive liquid, a fluorescent material is provided in the transparent insulating heat conductive liquid, and the concave inner cover  61  is an elastic inner cover of a thin concave structure, as shown in  FIG. 8 . The LED chip may also be packaged by adopting a traditional package solution, namely, fluorescent powder is spray coated on the LED chip and transparent silica gel is covered thereon, and no bulb inner cover is used. When the present invention is applied to agricultural production lighting, the number of the LED chips is configured according to the proportion of blue and red lights necessary for plants, and only the transparent silica gel is covered on the welded LED chip for package. 
         [0088]    A third LED bulb: an integral LED bulb for implementing the foregoing method, including a heat conductive bracket  3  provided with a cooling fin, wherein a silver paste printed circuit  4  is embedded on the heat conductive bracket  3 , and an LED chip is welded on the silver paste printed circuit  4 , or a drive chip is further welded thereon, and a waterproof joint  10 A with a cable is fixed to a connector fixing hole of the heat conductive bracket  3  through a cable fixing head  11 A, as shown in  FIG. 5 . A slot  18  is provided to the heat conductive bracket  3 , a bulb inner cover  6  is fixed to the slot in an embedding manner, and the bulb inner cover  6  covers the LED chip and the drive chip, as shown in  FIG. 6 . The heat conductive bracket  3  is fixed in a lens bracket  71  with a hang lug, and a lens  7  is provided at the lower end of the lens bracket  71 , as shown in  FIG. 10 . Transparent silica gel for package is provided outside the LED chip, the bulb inner cover  6  is provided outside the LED chip with the transparent silica gel, and fluorescent powder coating is provided to the inner layer of the bulb inner cover  6 ; or, no silica gel is packaged on the LED chip, and a concave inner cover  61  filled with transparent insulating heat conductive liquid is provided outside the LED chip, as shown in  FIG. 7 . The LED chip is soaked in the transparent insulating heat conductive liquid, a fluorescent material is provided in the transparent insulating heat conductive liquid, and the concave inner cover  61  is an elastic inner cover of a thin concave structure, as shown in  FIG. 8 . The LED chip may also be packaged by adopting a traditional package solution, namely, fluorescent powder is spray coated on the LED chip and transparent silica gel is covered thereon, and no bulb inner cover is used. When the present invention is applied to agricultural production lighting, the number of the LED chips is configured according to the proportion of blue and red lights necessary for plants, and only the transparent silica gel is covered on the welded LED chip for package. 
         [0089]    A lamp may be constructed just by fixing the integral LED bulb in the present invention on the lamp used as an installation interface. As shown in  FIG. 13  and  FIG. 14 , a down lamp may be constructed by installing the integral LED bulb on a down lamp housing  101  with the installation interface; a ceiling lamp may be constructed by installing the integral LED bulb in a ceiling lamp head plate  103  with the installation interface and covering with a ceiling lamp housing  101 . 
         [0090]    The bulb outer diameter D and an upper limit of power W of the constructed LED bulb satisfy a relationship W=1.1812e 0.0361D , discrete numerical values are selected for D on the relationship curve W=1.1812e 0.0361D  to construct a plurality of LED bulbs with fixed bulb outer diameters D, in order to improve the interchangeability and universality of the LED bulbs. On the relationship curve W=1.1812e 0.0361D , with 20 mm used as the lower limit of D and 130 mm used as the upper limit, the relationship curve is divided into 12 segments each of which is set to 10 mm to form limited bulb outer diameter specifications, and the interchangeability and universality of the LED bulbs are further improved by the small amount of bulb outer diameter specifications. A screw hole distribution circle (or the outer diameter of the hang lug) D 1  for fixing the bulb and the diameter D 2  of an installation interface opening of the lamp are influenced by the size of the used screw, and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb; the diameter D 2  of the installation interface opening is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the outer diameter D of the bulb; the value of the wire outlet hole distance L of the bulb is set according to the following table. In  FIG. 1 ,  FIG. 2 ,  FIG. 11  and  FIG. 12 , the outer diameter D of the size of the bulb, the diameter D 1  of the flange screw hole (or the outer diameter of the hang lug) distribution circle and the outer diameter D 3  of the cooling fin are manufactured according to specified sizes, and the related sizes are set forth in  FIG. 15  and the following table: 
         [0000]    
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                   
               
               
                 outer 
                 Diameter D1 
                 Diameter D2 
                 Wire  
                 Fixing 
                   
               
               
                 diameter  
                 (mm) of 
                 (mm) of 
                 outlet 
                 screw 
                   
               
               
                 D (mm)  
                 screw hole 
                 instalation  
                 hole 
                 specification 
                 Suitable 
               
               
                 of 
                 distribution 
                 interface 
                 distance L  
                 ¢  
                 power 
               
               
                 bulb 
                 circle 
                 opening 
                 (mm) 
                 (mm) 
                 (W) 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 20 
                 16 
                 12 
                 2 
                 M1.6 
                 &lt;2.5 
               
               
                 30 
                 25 
                 20 
                 2 
                 M1.6 
                 &lt;3.5 
               
               
                 40 
                 35 
                 30 
                 2 
                 M1.6 
                 &lt;5 
               
               
                 50 
                 42 
                 34 
                 2 
                 M2.5 
                 &lt;7 
               
               
                 60 
                 52 
                 44 
                 2 
                 M2.5 
                 &lt;10 
               
               
                 70 
                 62 
                 54 
                 2 
                 M2.5  
                 &lt;14.5 
               
               
                 80 
                 70 
                 60 
                 18 
                 M3.5  
                 &lt;21 
               
               
                 90 
                 80 
                 70 
                 18 
                 M3.5  
                 &lt;30 
               
               
                 100 
                 90 
                 80 
                 27 
                 M3.5  
                 &lt;44 
               
               
                 110 
                 100 
                 90 
                 27 
                 M3.5  
                 &lt;64 
               
               
                 120 
                 110 
                 100 
                 33 
                 M3.5 
                 &lt;90 
               
               
                 130 
                 120 
                 110 
                 33 
                 M3.5 
                 &lt;130 
               
               
                   
               
               
                 Note 1: 
               
               
                 the outer diameter D3 of the bulb radiator or the outer cover is not larger than D2-1; 
               
               
                 note 2: 
               
               
                 the diameter Φ of the bulb wire outlet hole is determined according to the size of the bulb connector (interface) plug. 
               
             
          
         
       
     
       Embodiment 1 
       [0091]    An oval LED street lamp using an installation interface bracket structure, as shown in  FIG. 1  and  FIG. 14 , including an installation interface plate fixing bracket  112 , wherein an installation interface plate  103  is provided at the lower part of the installation interface plate fixing bracket  112 , an installation interface is provided to the installation interface plate  103 , and an LED bulb  102  is provided to the installation interface; the installation interface plate fixing bracket  112  is connected to a lamp post  108 ; a lamp housing  101  is provided at the upper part of the installation interface plate fixing bracket  112 , a lampshade  113  is provided outside the installation interface plate  103 , and the lamp housing  101  matches with the lampshade  113  to form an oval shape. A wire harness connector  106  is provided to the installation interface plate fixing bracket  112 , and the wire harness connector  106  is used for connecting a plurality of LED bulbs  102  to a power supply and a control circuit. The installation interface plate fixing bracket  112  includes a sleeve  116 , the sleeve  116  is used for installing the lamp post  108 , wire harness connector brackets  107  are provided on both sides of the sleeve  116 , and the wire harness connector brackets  107  are used for installing the wire harness connector  106 ; a ring plate  114  is provided outside the sleeve  116  and the wire harness connector brackets  107 , and the ring plate  114  is used for fixedly connecting the installation interface plate  103  to the installation interface plate fixing bracket  112 , as shown in  FIG. 15 . A light penetration hole is provided to the lampshade  113 ; the installation interface includes a surface in contact with the LED bulb  102  and a hole connected to the LED bulb on the installation interface plate  103 . A radiator interface opening and 6 flange fixing holes are provided to the installation interface of the installation interface plate  103 , the flange fixing holes are used for fixing the LED bulb  102 , and the radiator interface opening is used for enabling the LED bulb  102  to penetrate through the installation interface; the flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb  102 ; the diameter D 2  of the radiator interface opening on the installation interface is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the outer diameter D of the bulb. The LED bulb  102  is installed on the bulb installation interface through a bulb fixing screw  105 , and the lamp post  108  is installed in the sleeve through a lamp post fixing screw  109 . 
         [0092]    The lamp in the embodiment uses the installation interface plate fixing bracket as the core, the installation interface plate fixing bracket provides an installation interface for the lamp post while providing a supporting interface for the installation interface plate, and the installation interface plate provides an installation interface for the LED bulb. In the present invention, the LED bulb and all of other auxiliary components are collectively installed and fixed to the installation interface plate fixing bracket, thus the LED street lamp is simple, practical and beautiful. 
         [0093]    The meanings of the reference numerals in the embodiment are as follows:  101 —lamp housing,  102 —LED bulb,  103 —installation interface plate,  105 —bulb fixing screw,  106 —wire harness connector,  107 —wire harness connector bracket,  108 —lamp post,  109 —lamp post fixing screw,  112 —installation interface plate fixing bracket,  113 —lampshade,  114 —ring plate, and  116 —sleeve. 
       Embodiment 2 
       [0094]    An LED street lamp using a lamp housing as an installation interface bracket structure, as shown in  FIG. 19 ,  FIG. 20 ,  FIG. 21  and  FIG. 22 , includes the lamp housing  101  punch formed by sheet metal via a stamping process, wherein an installation interface is provided to the lamp housing  101 , an LED bulb  102  is provided to the installation interface, the lamp housing  101  is fixed to a lamp post  108  by a lamp post fixing element, and a decorative cover  103  is provided to the lamp housing  101 . The LED street lamp using the lamp housing as the installation interface bracket structure further includes a wire harness connector  106 , wherein the wire harness connector  106  is provided to the decorative cover  103 , and the wire harness connector  106  is used for connecting a plurality of LED bulbs  102  to a power supply and a control circuit. The lamp housing  101  is elliptic, edgefolds for reinforcing the structural strength are provided at the inner and outer edges of the lamp housing  101 , and the installation interface includes a surface in contact with the LED bulb  102  and a hole connected to the LED bulb, on the lamp housing  101 . The lamp post fixing element includes a lamp post fixing bracket  112 , a lamp post fixing bracket bolt  111  and a reinforcing plate  110 , wherein the lamp post fixing bracket  112  and the reinforcing plate  110  are provided at the upper and lower sides of the lamp housing  101 , and the lamp housing  101  is fixed to the lamp post  108  through the lamp post fixing bracket  112  and the reinforcing plate  110 . A radiator interface opening and 6 flange fixing holes are provided to the installation interface of the lamp housing  101 , the flange fixing holes are used for fixing the LED bulb  102 , and the radiator interface opening is used for enabling the LED bulbs  102  to penetrate through the installation interface; the flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb  102 ; the diameter D 2  of the radiator interface opening on the installation interface is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the outer diameter D of the bulb. The wire harness connector  106  is fixed to the decorative cover  103  through a wire harness connector bracket and screw  107 . The lamp post fixing bracket  112  is fixed to the lamp housing  101  through the reinforcing plate  110  and the lamp post fixing bracket bolt  111 , and the lamp post  108  is connected to the lamp post fixing bracket  112  through a lamp post fixing screw  109 . Each LED bulb  102  is installed on the lamp housing  101  through bulb fixing screws  105 , and the LED bulb  102  penetrates through an installation interface hole. The LED bulb  102  is installed on the installation interface from the lower side. 
         [0095]    In the embodiment, a heat conductive pad  2  is provided between a flange or an installation flange and the installation interface. 
         [0096]    In the embodiment, the heat conductive bracket  3  may also be fixed in a bulb outer cover  91  provided with the installation flange. 
         [0097]    In the embodiment, the LED bulb  102  may also be installed on the lamp housing from the upper side, as shown in  FIG. 23  and  FIG. 24 . 
         [0098]    The meanings of the reference numerals in the embodiment are as follows:  101 -lamp housing,  102 -LED bulb,  103 -decorative cover,  105 -bulb fixing screw,  106 -wire harness connector,  107 -wire harness connector bracket and screw,  108 -lamp post,  109 -lamp post fixing screw,  110 -reinforcing plate,  111 -lamp post fixing bracket bolt, and  112 -lamp post fixing bracket. 
       Embodiment 3 
       [0099]    An LED street lamp using a lamp housing as an installation interface bracket structure, as shown in  FIG. 25 ,  FIG. 26  and  FIG. 27 , includes a lamp housing  101  punch formed by sheet metal; the lamp housing  101  includes a bracket panel folded to multiple pieces, an installation interface is provided to the bracket panel, and an LED bulb  102  is provided to the installation interface; the lamp housing  101  is fixed to a lamp post  108  through a lamp post fixing element. The LED street lamp using the lamp housing as the installation interface bracket structure further includes a wire harness connector  106 , wherein the wire harness connector  106  is provided to the lamp housing  101 , and the wire harness connector is used for connecting a plurality of LED bulbs  102  to a power supply and a control circuit. An edgefold for reinforcing the structural strength is provided at the edge of the lamp housing  101 , and the installation interface includes a surface in contact with the LED bulb  102  and a hole connected to the LED, bulb on the lamp housing  101 ; a lamp post fixing hole used for connecting the lamp post  108  is formed in the upper part of the lamp post fixing bracket  112 . The lamp post fixing element includes a lamp post fixing bracket  112 , a lamp post fixing bracket bolt  111  and a reinforcing plate  110 , wherein the lamp post fixing bracket  112  and the reinforcing plate  110  are provided at the upper and lower sides of the lamp housing  101 , and the lamp housing  101  is fixed to the lamp post  108  through the lamp post fixing bracket  112  and the reinforcing plate  110 ; the lamp housing  101  includes three bracket panels which are folded to form an angle, a planar bracket is provided at the lower part of the lamp post fixing bracket  112 , and the lamp post fixing bracket  112  is fixed to the bracket panel at the center of the lamp housing  101  from the upper side or the lower side of the lamp housing  101 . 6 flange fixing holes and a radiator interface opening are provided to the installation interface, the flange fixing holes are used for fixing each LED bulb  102 , and the radiator interface opening is used for enabling the LED bulb  102  to penetrate through the installation interface; the 6 flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb  102 ; the diameter D 2  of the radiator interface opening is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the bulb outer diameter D. The LED bulb  102  is installed on the installation interface through a bulb fixing screw  105 , the wire harness connector  106  is installed on the lamp housing  101  through a wire harness connector bracket and screw  107 , the lamp post fixing bracket  112  and the reinforcing plate  110  are fixed to the lamp housing  101  through the lamp post fixing bracket bolt  111 , and the lamp post  108  is connected to the lamp post fixing bracket  112  through a lamp post fixing screw  109 . 
         [0100]    In the embodiment, the bracket panels on both sides may also be provided downwards to form an angle, as shown in  FIG. 28  and  FIG. 32 . 
         [0101]    In the embodiment, or the lamp housing  101  includes two bracket panels which are folded upwards to form an angle, at this time, a triangular bracket is provided at the lower part of the lamp post fixing bracket  112  and is V-shaped, as shown in  FIG. 29  and  FIG. 33 . 
         [0102]    In the embodiment, or the lamp housing  101  includes two bracket panels which are folded downwards to form an angle, at this time, a triangular bracket is provided at the lower part of the lamp post fixing bracket  112  and is inverted V-shaped, as shown in  FIG. 30  and  FIG. 34 . 
         [0103]    In the present invention, in the case of an accident, the bulb may be conveniently maintained and changed just by directly detaching the bulb  102  from the lamp housing  101 , as shown in  FIG. 25 . 
         [0104]    The meanings of reference numerals in the embodiment are as follows:  101 —lamp housing,  102 —LED bulb,  105 —bulb fixing screw,  106 —wire harness connector,  107 —wire harness connector bracket and screw,  108 -lamp post,  109 —lamp post fixing screw,  110 —reinforcing plate,  111 —lamp post fixing bracket bolt, and  112 —lamp post fixing bracket. 
       Embodiment 4 
       [0105]    An LED street lamp using an extrusion type installation interface bracket structure, as shown in  FIG. 35  and  FIG. 36 , including an extrusion type installation interface bracket  103 , wherein the extrusion type installation interface bracket  103  is fixed to a lamp post  108 ; the extrusion type installation interface bracket  103  includes a lamp post fixing sleeve, bracket panels are provided on both sides of the lamp post fixing sleeve, and an installation interface used for installing an LED bulb  102  is provided to each bracket panel; the LED bulb  102  with waterproof and dustproof functions and provided with a radiator is installed on the installation interface. The LED street lamp using the extrusion type installation interface bracket structure further includes a wire harness connector  106 , wherein the wire harness connector  106  is provided to the lamp post fixing sleeve, and the wire harness connector  106  is used for connecting a plurality of LED bulbs  102  to a power supply and a control circuit. In the extrusion type installation interface bracket  103 , the bracket panels on both sides are provided upwards to form an angle, as shown in  FIG. 40 ; a lamp post seal head  101  is provided at one end of the lamp post fixing sleeve, and the other end of the lamp post fixing sleeve is fixed to the lamp post  108  through a lamp post fixing screw  109 ; the installation interface includes a surface in contact with the LED bulb  102  and a hole connected to the LED bulb, on the bracket panels. A radiator interface opening and 6 flange fixing holes are provided to the installation interface, the flange fixing holes are used for fixing the LED bulb  102 , and the radiator interface opening is used for enabling the LED bulb  102  to penetrate through the installation interface; the 6 flange fixing holes are uniformly distributed at a diameter D 1 , and the diameter D 1  is a value obtained by subtracting a diameter of a fixing screw cap and then subtracting a margin of 0.8-4 mm from the outer diameter D of the LED bulb  102 ; the diameter D 2  of the radiator interface opening is a value obtained by subtracting two times of a diameter of a fixing screw cap and then subtracting two times of the margin corresponding to the diameter D 1  from the bulb outer diameter D. The LED bulb  102  is installed on the installation interface through a bulb fixing screw  105 . The wire harness connector  106  is installed on the lamp post fixing sleeve through a wire harness connector bracket and fixing screw  107 . 
         [0106]    In the embodiment, the bracket panels may also be provided downwards to form an angle, as shown in  FIG. 37  and  FIG. 41 . 
         [0107]    In the embodiment, the bracket panels may also be connected and provided upwards to form an angle, as shown in  FIG. 38  and  FIG. 42 . 
         [0108]    In the embodiment, the bracket panels may also be connected and provided downwards to form an angle, as shown in  FIG. 39  and  FIG. 43 . 
         [0109]    In the present invention, in the case of an accident, the bulb may be conveniently maintained and changed just by directly detaching the bulb  102  from the extrusion type installation interface bracket  103 , as shown in  FIG. 35 . 
         [0110]    The lamp in the embodiment adopts the extrusion type installation interface bracket as the main component, the bracket panels of the extrusion type installation interface bracket provide installation supporting interfaces for the LED bulb, the LED bulb and other auxiliary components are overall collectively installed on the extrusion type installation interface bracket, thereby being simple in structure, low in manufacturing cost and convenient to install, use and maintain. The extrusion type installation interface bracket performs such functions of the lamp housing as preventing water and preventing dust and the like at the same time. 
         [0111]    The meanings of the reference numerals in the embodiment are as follows:  101 —lamp post seal head,  102 —LED bulb,  103 —extrusion type installation interface bracket,  105 —bulb fixing screw,  106 —wire harness connector,  107 —wire harness connector bracket and fixing screw,  108 —lamp post, and  109 —lamp post fixing screw.