PATENT ABSTRACT
An illumination device includes a housing defining a hole therethrogh; a plurality of light sources each is a light emitting diode is disposed in the housing; a lamp seat is securely positioned at one side of the housing. The lamp seat comprises a protrusion configured to receive electronic elements therein. The protrusion of the lamp seat is inserted into the hole of the housing.

PATENT DESCRIPTION
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to illumination, particularly to an illumination device with decreased thickness, and more particularly to a low-profiled LED (light emitting diode) ceiling lamp. 
         [0003]    2. Description of Related Art 
         [0004]    A traditional lamp generally includes a housing and a plurality of light sources mounting on the housing. A lamp cover is fastened to one side of the housing to cover the light sources, and a lamp seat is fastened to the other side of the housing to receive electronic elements therein for providing power for the light sources. In the lamp described above, the lamp seat positioned at one side of the housing will occupy a certain space thereto make the lamp have a relatively large thickness. When such a thick lamp is used as a ceiling lamp for a room with a relatively small height, a feeling of constriction will be exerted to a person in the room. Moreover, such a lamp is high power consuming. 
         [0005]    What is needed, therefore, is an illumination device which can overcome the limitations described. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
           [0007]      FIG. 1  is an isometric view of an illumination device according to one embodiment of the present disclosure. 
           [0008]      FIG. 2  is an inverted view of  FIG. 1 . 
           [0009]      FIG. 3  is an exploded view of the illumination device of  FIG. 1 . 
           [0010]      FIG. 4  is an inverted view of  FIG. 3 . 
       
    
    
     DETAILED DESCRIPTION 
       [0011]    Referring to  FIGS. 1-2 , an illumination device  100  according to an embodiment of present disclosure includes a housing  20  and a lamp seat  10  fastened to one side of the housing  20 . The illumination device  100  is particularly used as a low-profiled ceiling lamp with a light source consisting of light emitting diodes. 
         [0012]    Referring also to  FIGS. 3-4 , the lamp seat  10  includes an upper cover  12  and a lower cover  14  interconnected together. Electronic elements  16  are received between the upper cover  12  and the lower cover  14 . 
         [0013]    The upper cover  12  has a substantially trilobate shape, and includes an upper plate  122  and three lateral plates  124  extending downwardly from the upper plate  122 . A central portion of the upper plate  122  protrudes out away from the housing  20 . Three lateral sides of the upper plate  122  are curved towards the central portion. In this embodiment, the three lateral plates  124  one-to-one correspondingly extend down from the three lateral sides of the upper plate  122 . The lateral plates  124  are also curved towards the central portion of the upper plate  122 . The upper plate  122  and the lateral plates  124  cooperatively form a receiving chamber  126  therebetween. Each corner of the upper plate  122  has a first buckle  128 . The first buckle  128  extends downwardly from the upper plate  122  towards the housing  20 . One end of the first buckle  128  is bent inwardly to form a hook to connect with the lower cover  14 . Each lateral plate  124  has two snaps  129  extending horizontally and inwardly from an inner side thereof. The snaps  129  are configured to further strengthen the connection between the upper cover  12  and the lower cover  14 . 
         [0014]    The lower cover  14  has a similar configuration with the upper cover  12 . The lower cover  14  includes a bottom plate  142  and an annular sidewall  144  on a central portion of the bottom plate  142 . The sidewall  144  extends vertically from the bottom plate  142  to the upper cover  12 . The central portion of the bottom plate  142  surrounded by the sidewall  144  protrudes outwardly away from the upper cover  12  and forms a protrusion  146  opposite to the sidewall  144 . The protrusion  146  and the sidewall  144  cooperatively define a space  18  for receiving the electronic elements  16  therein. Each corner of the bottom plate  142  has a second buckle  148 . The second buckle  148  extends from the lower cover  14  towards the upper cover  12 . One end of the second buckle  148  is bent to form a hook to clasp with the first buckle  148 . Each corner of the bottom plate  142  defines two holes  141  therein. Screws or rivets (not labeled) are used to extend through the housing  20  and secure in the holes  141  to fix the lamp seat  10  and the housing  20  together. The holes  141  can be blind holes or through holes. 
         [0015]    The bottom plate  142  has a plurality of third buckles  149  one-to-one corresponding to the snaps  129  of the upper cover  12 . The third buckles  149  extend from the bottom plate  142  to the upper cover  12 . One end of each third buckle  149  is bent to form a hook to clasp with a corresponding one of the snaps  129  of the upper cover  12 . Therefore, the connection between the upper cover  12  and the lower cover  14  is strengthened. 
         [0016]    In assembly, the first buckles  128  of the upper cover  12  and the second buckles  148  of the lower cover  14  are clasped together. The receiving chamber  126  of the upper cover  12  and the space  18  inside the side wall  144  cooperatively receive the electronic elements  16  therein. In other words, one part of the electronic elements  16  is received in the space  18 , and the other part of the electronic elements  16  is received in the receiving chamber  126  of the upper cover  12 . Besides the trilobate shape, the lamp seat  10  can also substantially be a rectangle shape or a pentagonal shape. 
         [0017]    The housing  20  is annular, and defines a hole  21  through a center thereof. Alternatively, the housing  20  can be other configurations with the hole  21  defined therein, and the hole  21  is not limited in the center of the housing  20 . The lamp seat  10  is fastened to one side of the housing  20 . The protrusion  146  is inserted into the hole  21 , therefore, a thickness of the illumination device  100  can be decreased. Thus, the illumination device  100  has a low profile which is suitable to be a ceiling lamp for a room with a low height. In this embodiment, the housing  20  includes a base  22  and a cover  24 . The hole  21  is defined through both the base  22  and the cover  24 . 
         [0018]    The base  22  is an annular plate. A plurality of light sources i.e. light emitting diodes  222  are arranged on a bottom surface of the base  22 . The light emitting diodes  222  are arranged in two circles with different radius. In addition, the base  22  further defines a plurality of through holes  221  corresponding to the holes  141  of the bottom plate  142 . 
         [0019]    The cover  24  is located on the bottom surface of the base  22  with the light emitting diodes  222  facing toward the cover  24 . The cover  24  is made of transparent or translucency material. In addition, an inner surface of the cover  24  can be formed with microstructures to obtain a uniform light output for the illumination device  100 . The cover  24  includes an annular body  242 , and an outer flange  244  and an inner flange  246  extending from an outer edge and an inner edge of the body  242 , respectively. Three protruding platforms  248  extend upwardly from the body  242 , and are located between the inner flange  246  and the outer flange  244 . Each of the protruding platforms  248  defines two through holes  241  therein, corresponding to the two adjacent holes  141  at a same corner of the bottom plate  142 , for connecting the cover  24 , the base  22  and the lamp seat  10  together. When the cover  24  and the base  22  are assembled together, the inner flange  246  abuts against a bottom of the seat  22 . In this embodiment, the inner edge  244  and the outer edge  246  each define a plurality of recesses (not labeled) therein to facilitate airflow flowing through the cover  24  thereby to obtain a better heat dissipation of the light emitting diodes  222 . 
         [0020]    During assembly of the illumination device  100 , the electronic elements  16  are arranged in the space  18  inside the annular sidewall  144  of the lower cover  14 . The upper cover  12  is connected with the lower cover  14  with the receiving chamber  126  aligned and communicating with the space  18 , thereby to secure the electronic elements  16  between the upper cover  12  and the lower cover  14 . In this embodiment, the upper cover  12  and the lower cover  14  are connected together by the first buckles  128  clasping with the second buckles  148 . The cover  24  is attached to the bottom surface of the base  22  which have the light emitting diodes  222  mounted thereon. Rivets or screws are brought to extend through the through holes  241 ,  221  and secure in the holes  141  to fix the cover  24  and the base  22  to the lamp seat  10 . 
         [0021]    In the present illumination device  100 , the protrusion  146  of the bottom plate  142  is configured to define a space  18  to receive the electronic elements  16  therein, and the protrusion  146  is inserted into the hole  21  of housing  20 . Therefore, the thickness of the illumination device  100  can be effectively decreased. Moreover, the use of LEDs  222  as the light source can effectively lower the consumed power while have the same brightness. 
         [0022]    It is to be further understood that even though numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.