Patent Publication Number: US-2003226746-A1

Title: Switch casing assembly for ceiling fan

Description:
FIELD OF THE INVENTION  
       [0001] The present invention relates to a switch casing assembly for a ceiling fan wherein the switch casing comprises two parts and one of which has L-shaped notches and the other has protrusions to be engaged with the L-shaped notches.  
       BACKGROUND OF THE INVENTION  
       [0002] A conventional ceiling fan generally includes a switch casing with a motor received therein so as to drive a shaft to which fan blades are connected. The conventional switch casing generally is composed of two parts and one of which is smaller than the other so that the smaller one is engaged with the larger one. Screws are used to penetrate through the walls of the two parts to combine the two parts. Although using screws to connect the two parts of the switch casing is used for a long period of time, it takes a lot of time to position the screws one by one. There are screw head seen from the outer appearance of the switch casing and this affects the aesthetic feature of modern design of the ceiling fans.  
       [0003] The present invention intends to provide a switch casing assembly which does not use any screw and can be assembled quickly.  
       SUMMARY OF THE INVENTION  
       [0004] In accordance with one aspect of the present invention, there is provided a switch casing assembly for a ceiling fan and the switch casing comprises a first part and a second part. The first part has a top with a hole defined therethrough and a first skirt portion extends from the top. A plurality of L-shaped notches are defined in the first skirt portion from a lower periphery of the first skirt portion. The second part has a bottom with a hole defined therethrough and a second skirt portion extends from the bottom. A plurality of protrusions extend from an inside of the second skirt portion so as to be engaged with the L-shaped notches to connect the two parts.  
       [0005] The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. 
     
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
     [0006]FIG. 1 is a bottom perspective view to show the first part of the switch casing of the present invention;  
     [0007]FIG. 2 is a perspective view to show the second part of the switch casing of the present invention;  
     [0008]FIG. 3 is an exploded view to show the two parts of the present invention, and  
     [0009]FIG. 4 is a cross sectional view to show the engagement of the two parts of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
     [0010] Referring to FIGS.  1  to  3 , the switch casing assembly of the present invention comprises a first part  10  that has a top with a hole  11  defined therethrough and a first skirt portion  12  extends from the top. A plurality of L-shaped notches  13  are defined in the first skirt portion  12  from a lower periphery of the first skirt portion  12 .  
     [0011] A second part  20  has a bottom with a hole  21  defined therethrough and a second skirt portion  22  extends from the bottom. A plurality of protrusions  23  extend from an inside of the second skirt portion  22 .  
     [0012] As shown in FIG. 4, the first skirt portion  12  of the first part  10  is engaged with a space enclosed by the second skirt  22  of the second part  20  and the protrusions  23  are engaged with the L-shaped notches  13  from the lower periphery of the first skirt portion  12 .  
     [0013] Therefore, for the assemblers, the assembling of the switch casing is easy and convenient simply by matching the two parts  10 ,  20  and inserting the protrusions  23  in the L-shaped notches  13 , and then rotating either one of the two parts  10 ,  20  to let the protrusions  23  well engaged with the notches  13 . There are no screws needed and the assembling process can be completed within a short period of time.  
     [0014] While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.