Patent Publication Number: US-2011051410-A1

Title: In-wall led lamp can be adjustable in angles

Description:
BACKGROUND OF THE INVENTION 
     1. Technical Field 
     The present invention relates to an in-wall LED (light-emitting diode) lamp can be adjustable in angles. More particularly, the present invention relates to an LED lamp whose light-emitting assembly is mounted in a frame and adjustable to various projection angles. Even more particularly, the present invention relates to an LED lamp including a lamp body coupled to an in-wall frame by screws such that the LED lamp is structurally simplified and can be adjusted to various projection angles. 
     2. Description of Related Art 
     It is well known that conventional in-wall lamps include in-wall incandescent lamps and in-wall LED lamps. A conventional in-wall lamp essentially includes an in-wall frame, a lamp body, and a light-emitting unit or light bulb. While the projection angle of the light-emitting unit or light bulb is adjustable, the adjustment of projection angle can only be achieved by adjusting the light-emitting unit or light bulb itself due to structural constraints. Moreover, the conventional in-wall lamps are disadvantaged by structural complexity, difficult maintenance, and high production costs. 
     Besides, since the light-emitting unit of an LED lamp in general is not a light bulb with a metal filament that works by incandescence, but an LED chip that works on the principle of semiconductor diodes and may easily burn under high temperature, an LED lamp must be equipped with an efficient heat dissipation mechanism, which nevertheless leads to the complicated structure of conventional in-wall LED lamps. In addition, as previously mentioned, the projection angle of a conventional in-wall LED lamp can only be adjusted by adjusting the light-emitting unit itself. 
     BRIEF SUMMARY OF THE INVENTION 
     In view of the aforesaid shortcomings of the conventional in-wall lamps, the inventor of the present invention conducted extensive research and finally succeeded in developing an in-wall LED lamp can be adjustable in angles as disclosed herein. The disclosed in-wall LED lamp is characterized by integrating heat dissipation fins, a transformer, and a light-emitting unit into a lamp body. The lamp body is further coupled to an in-wall frame by screws such that the LED lamp is structurally simplified and adjustable to various projection angles. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         FIG. 1  is a perspective view of an in-wall LED lamp can be adjustable in angles according to the present invention; 
         FIG. 2  is a side view of the LED lamp according to the present invention; 
         FIG. 3  is an exploded perspective view of the LED lamp according to the present invention; 
         FIG. 4  is a perspective view showing angular adjustment of the LED lamp according to the present invention; 
         FIG. 5  is a side view of  FIG. 4 ; 
         FIG. 6  is another perspective view showing angular adjustment of the LED lamp according to the present invention; and 
         FIG. 7  is a side view of  FIG. 6 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIG. 1  and  FIG. 3 , an in-wall LED lamp can be adjustable in angles according to the present invention essentially includes an in-wall frame  1 , an aluminum extruded fin body  2 , a transforming element  3 , a light-emitting element  4 , and a light-guiding plate  5 . 
     The aluminum extruded fin body  2  has an upper portion formed with parallel heat dissipation fins  21 . The aluminum extruded fin body  2  also has two lateral sides provided with threaded holes  22 ,  23 , respectively, wherein one of the lateral sides is further formed with a through hole  24 . In addition, the aluminum extruded fin body  2  is provided with extension plates  25 ,  26  such that a cavity  27  is formed at a central portion of the aluminum extruded fin body  2 . The transforming element  3  and one or more light-emitting elements  4  are fixedly provided in the cavity  27 . The light-emitting elements  4  are electrically connected to a direct-current (DC) power output end of the transforming element  3 . An alternating-current (AC) power input end of the transforming element  3  is electrically connected to an AC power line that passes through the through hole  24  of the aluminum extruded fin body  2 , and said transforming element  3  there are one or more said transforming elements. 
     The extension plates  25 ,  26  provided bilaterally on the aluminum extruded fin body  2  have lower ends whose inner surfaces are formed with grooves  251 ,  261 , respectively. The grooves  251 ,  261  are configured for receiving the light-guiding plate  5 . The light-guiding plate  5  is formed with through holes  51  corresponding in number and position to the light-emitting elements  4 . Thus, when received by the grooves  251 ,  261 , the light-guiding plate  5  covers the transforming element  3  but allows light emitted by the light-emitting elements  4  to pass through. In addition, a light-penetrable isolation plate  52  is provided outward of the light-guiding plate  5 . 
     Besides, end plates  28 ,  29  are fixedly provided at two ends of the cavity  27  of the aluminum extruded fin body  2 . 
     The in-wall frame  1  is bilaterally provided with extension plates  11 ,  12  to be passed through by screws  13 ,  14 , respectively, so as for the screws  13 ,  14  to pass through the holes  22 ,  23  at the two lateral sides of the aluminum extruded fin body  2  and be coupled with nuts from inside the aluminum extruded fin body  2 , respectively. 
     Thus, the LED lamp which includes the aluminum extruded fin body  2 , the transforming element  3 , the light-emitting elements  4 , and the light-guiding plate  5  can be adjusted to various projection angles, as shown in  FIG. 4  through  FIG. 7 .