Patent Publication Number: US-7717590-B1

Title: LED lamp with reflecting casings

Description:
FIELD OF THE INVENTION 
     The present invention relates to LED lamps, in particular to an LED lamp with reflecting casings which has a main heat dissipating casing and at least one auxiliary heat dissipating casings. The present invention provides that the lamp has a conventional beautiful outlook and has a greater heat dissipation area so that the temperature of the lamp is reduced greatly. Furthermore, the cost is down and less material is used. further the lifetime of the LED lamp is prolonged. 
     BACKGROUND OF THE INVENTION 
     LED has widely used in many field due to small volume and power saving. However currently, LEDs have the problem of heat dissipation. This make the high power LED can not replace the convention illumination device effectively. The heat dissipation will increase with the increment of the temperature of the LED, while this will short the lifetime of the LED. 
     With reference to  FIG. 1 , the prior art lamp  10  has heat dissipation fins  100  for heat dissipation. The fins  100  are made of extrusion of aluminum sheet which has a heavy and large shape which is not match to the shape of the lamp. Thereby, the fins are expensive. To have preferred heat dissipation effect, it is necessary to increase the area and thus size of fins, but this will make the outlook of the lamp feel ugly and the manufacturing process is tedious and thus is expensive. Therefore, there is an eager demand for a novel design which can improve the defects in the prior art so as to provide a high heat dissipation LED lamp with smaller size. 
     SUMMARY OF THE INVENTION 
     Accordingly the object of the present invention is to provide an LED lamp with reflecting casings; comprising: a bulb seat having an international standard joint at an outer side thereof; an interior of the bulb seat having a power supply; an insulating layer for isolating the power supply and an auxiliary heat dissipating casing; the bulb seat having a plurality of hollow posts and the wires connected to a circuit board and protruding outwards; the auxiliary heat dissipating casing having a hollow tapered shape which is opened at two ends; a lower opening of the auxiliary heat dissipating casing being enclosed by an inward edge; the inward edge being formed with a plurality of connecting holes; a main heat dissipating casing being a hollow tapered shape and being opened at two ends; the tapered size of the main heat dissipating casing being smaller than that of the auxiliary heat dissipating casing; an upper opening of the main heat dissipating casing having a third inward edge which is formed with a plurality of second connecting holes; an LED lamp body having a conductive metal heat sink with good conductivity at an upper side thereof; an inner supporting surface of the LED lamp body serving to install with at least one LED chip; the metal heat sink having a round shape and a rear end thereof protrudes with chip pins; and a heat conducting base for receive the LED lamp body; the heat conducting base having a plurality of connecting holes; a center of the heat conducting base being installed with a round recess; and the recess being installed with a plurality of pin holes so that the chip pins can be installed to a rear end of the heat conducting base. 
     The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of the prior art lamp. 
         FIG. 2  is an exploded perspective view of the present invention. 
         FIG. 3  is an exploded perspective view of the present invention which is viewed from another direction. 
         FIG. 4  is an assembled perspective view of the present invention. 
         FIG. 5  is an assembled cross sectional view of the present invention. 
         FIG. 6  is a cross sectional view of another embodiment of the present invention. 
         FIG. 7  is an assembled cross sectional view showing that the layer can be increased as desired. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. 
     Referring to  FIGS. 2 and 3 , the structure of the present invention is illustrated. The present invention has the following elements. A bulb seat  1  has an international standard joint  11  at an outer side thereof. An interior of the bulb seat  1  has a power supply  12 . An insulating layer  13  serves to isolate the power supply  12  and an auxiliary heat dissipating casing  2 . The bulb seat  1  has a plurality of hollow posts  14  and the wires connected to a circuit board and protruding outwards. 
     The auxiliary heat dissipating casing  2  has a hollow tapered shape which is opened at two ends. A lower opening  21  of the auxiliary heat dissipating casing  2  is enclosed by an inward edge  22 . The inward edge  22  is formed with a plurality of connecting holes  24 . 
     A main heat dissipating casing  4  is a hollow tapered shape and is opened at two ends. The tapered size of the main heat dissipating casing  4  is smaller than that of the auxiliary heat dissipating casing  2 . An upper opening  41  of the main heat dissipating casing  4  has a third inward edge  42  which is formed with a plurality of second connecting holes  44 . 
     An LED lamp body  3  has a conductive metal heat sink  31  with good conductivity at an upper side thereof. An inner supporting surface  32  of the LED lamp body  3  serves to install with at least one LED (light emitting diode) chip  33 . The metal heat sink  31  may has a round shape and a rear end thereof protrudes with chip pins  36 . 
     A heat conducting base  35  serves to receive the LED lamp body  3 . The heat conducting base  35  has plurality of connecting holes  34 . A center of the heat conducting base  35  is installed with a round recess  351 . The recess  351  is installed with a plurality of pin holes  352  so that the chip  33  can be firmed secured to a rear end of the heat conducting base  35 . 
     Referring to  FIGS. 4 and 5 , in the present invention, the main heat dissipating casing  4  has the function of dispersing light to have a desired light shape. Furthermore, the main heat dissipating casing  4  and the through holes  20  of the auxiliary heat dissipating casing  2  will cause that the heat from the LED lamp body  3  is transferred to the main heat dissipating casing  4  and the auxiliary heat dissipating casing  2 . Then the heat is further dissipated through the main heat dissipating casing  4  and the auxiliary heat dissipating casing  2  so as to have a great heat dissipation area and has the effect of multilayer heat dissipation effect. No heat is accumulated and the heating effect of the LED lamp body  3  is increased. The lifetime of the lamp is prolonged. 
     Referring to  FIG. 6 , the structure of the present invention can match the length of the auxiliary heat dissipating casing  2  so as to have a desired shape and the assembly work can be performed easily and quickly. 
     Referring to  FIG. 7 , it is illustrated it is illustrated that there are plurality of other auxiliary heat dissipating casings  2  installed between the main heat dissipating casing  4  and the auxiliary heat dissipating casing  2  near the main heat dissipating casing  4  or the auxiliary heat dissipating casing  2  so as to increase the heat dissipation ability. 
     The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.