Patent Publication Number: US-9890794-B2

Title: Fan assembly

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application No. 201410684081.1 filed on Nov. 25, 2014, the contents of which are incorporated by reference herein. 
     FIELD 
     The subject matter herein generally relates to a fan, especially relates to a fan assembly. 
     BACKGROUND 
     A fan assembly is used to cool electrical components of electrical device. In certain implementations, the fan assembly includes a first fan and a second fan attached to the first fan by a plurality of rivets. The combination of the first fan and the second fan can be such that fan assembly is shipped as a single unit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
         FIG. 1  is an isometric, assembly view of a fan assembly of an embodiment of the present disclosure. 
         FIG. 2  is an exploded, isometric view of the fan assembly of  FIG. 1 . 
         FIG. 3  is an exploded, isometric view of the fan assembly of  FIG. 1 , but show from another aspect. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     It will be appreciated that for simplicity and clarity of illustration, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure. The description is not to be considered as limiting the scope of the embodiments described herein. 
     The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like. 
     Referring to  FIG. 1 , a fan assembly  100  of a embodiment of the present disclosure includes a first fan  10  and a second fan  20 . The first fan  10  is attached on the second fan  20  to combine a fan  100  to cool electrical components of electrical device. 
     Also referring to  FIG. 2 , the first fan  10  includes a first frame  12 , and the second fan  20  includes a second frame  22 . The first frame  12  has a first jointing surface  120 , and a second frame  22  has a second jointing surface  220 . 
     In this embodiment, a first direction is defined along a diagonal direction of the first fan  10  and the second fan  20 , a second direction is defined along another diagonal direction of the first fan  10  and the second fan  20 . 
     Referring to  FIG. 3 , a first concave structure  130  and a first flange  124  are formed along two ends of the first direction of the first jointing surface  120  of the first fan  10 . A first concave structure  230  and a first flange  222  are also formed along two ends of the first direction of the second jointing surface  220  of the second fan  20 . The first flange  124  of the first fan  10  can move relatively to the second jointing surface  220  of the second fan  20  to embed in the concave structure of the second fan  20 . The first flange  222  of the second fan  20  can move relatively to the first jointing surface  120  of the first fan  10  to embed in the concave structure of the first fan  10 . 
     An elastic cantilever  1222  is formed on an end of the first direction of the first jointing surface  120  of the first fan  10 . A buckle hole  1240  is defined at another end of the first direction of the first jointing surface  120  and located opposite with the elastic cantilever  1222 . A distal end of the elastic cantilever  1222  forms a block  1224  protruded beyond of the first jointing surface  120 . 
     An elastic cantilever  2242  is formed at an end of the first direction of the second jointing surface  220  of the second fan  20 . A buckle hole  2220  is defined at another end of the first direction of the first jointing surface  220 , and located opposite with the elastic cantilever  2242 . A distal end of the elastic cantilever  2242  forms a block  2244  protruded beyond of the second jointing surface  220 . The block  1224  of the elastic cantilever  1222  of the first fan  10  is received in the buckle hole  2220  of the second fan  20 , and abut against the second fan  20 . The block  2244  of the elastic cantilever  2242  of the second fan  20  is received in the buckle hole  1240  of the first fan  10 , and abut against the first fan  10 . 
     As illustrated in  FIG. 2 , the first fan  10  also includes a circular first fixing base  14  located at a center of the first frame  12  to fix an impeller thereon. The circular first fixing base  14  connects the first frame  12  by a plurality of connecting arms  16 . A bottom surface of the circular first fixing base  14  is coplanar with the first jointing surface  120  of the first fan  10 . 
     The second fan  20  includes a circular second fixing base  24  located at a center of the second frame  22  to fix an impeller thereon. The circular second fixing base  24  connects the second frame  22  of the second fan  20  by a plurality of connecting arms  26 . A top surface of the circular second fixing base  24  is coplanar with the second jointing surface  220 . 
     As illustrated in  FIG. 3 , the first flange  124 , a second flange  121 , a third flange  123 , and a fourth flange  122  are formed on the first jointing surface  120  of the first frame  12  of the first fan  10 . The fourth flange  122  and the first flange  124  are formed along two ends of the first direction of the first jointing surface  120 , and a top surface of the fourth flange  122  and the first flange  124  are coplanar with the first jointing surface  120 . The second flange  121  and the third flange  123  are formed along two ends of the second direction of the first jointing surface  120 , and a top surface of the second flange  121  and the third flange  123  are coplanar with the first jointing surface  120 . In the illustrated embodiment, the first jointing surface  120  of the first fan  10 , and the second jointing surface  220  of the second fan  20  are rectangular. 
     Two second concave structures  240  are formed along two ends of the second direction of the second jointing surface  220  of the second fan  20 . The first flange  222 , a second flange  221 , a third flange  223 , and a fourth flange  224  are formed on a top surface of the second frame  22  of the second fan  20 . A top surface of the first flange  222 , the second flange  221 , the third flange,  223 , and the fourth flange  224  are coplanar with the second jointing surface  220  of the second frame  22 . The first flange  222  and the fourth flange  224  are formed along two ends of the first direction of the second jointing surface  220  of the second frame  22 , the second flange  221  and the third flange  223  are formed along two ends of the second direction of the second jointing surface  220  of the second frame  22 . 
     A bottom surface of the flange  122  of the first fan  10  extends downward to form an engagement part  125 . The first concave structure  130  of the first fan  10  includes the fourth flange  122  and the engagement part  125 . The engagement part  125  includes a connecting portion  1252  extended from the bottom of the flange  122 , a supporting portion  1254  extends horizontally from the connecting portion  1252 . The supporting portion  1254  is parallel with the first jointing surface  120  of the first frame  12  of the first fan  10 . A slot  1255  is defined between an inner side of the engagement part  125  and the fourth flange  122 . 
     The supporting portion  1254  defines a first groove  1256 . The first groove  1256  connects with the slot  1255 . The fourth flange  122  defines a second groove  1220 . The second groove  1220  is configured relatively with the first groove  1256  of the supporting portion  1254 . The fourth flange  122  extends horizontally in the second groove  1220  to form the elastic cantilever  1222 . The distal end of the elastic cantilever  1222  extends towards the engagement part  125  to form the block  1224 . The block  1224  protrudes beyond the first jointing surface  120  of the first fan  10 . Two relative sides of the elastic cantilever  1222  are spaced apart from the fourth flange  122  to increase elasticity of the elastic cantilever  1222 . 
     The first flange  124  defines a gap  1242 . The first flange  124  extends upward in the gap  1242  to form a convex block  126 . Two relative sides of the convex block  126  are spaced with the first flange  124  to increase elasticity of the convex block  126 . The first flange  124  is near to the convex block  126  to define the buckle hole  1240 . 
     A top surface of the second flange  221 , the third flange  223 , and the fourth flange  224  of the second fan  20  extends upward to form three engagement parts  225 . The second concave structure  240  of the second fan  20  includes the second flange  221 , the third flange  223 , and the corresponding engagement part  225 . The first concave structure  230  of the second fan  20  includes the fourth flange  224  and the corresponding engagement part  225 . The engagement part  225  includes a connecting portion  2252  respectively extending from the top surface of the second flange  221 , the third flange  223 , or the fourth flange  224 , and a supporting portion  2254  extending horizontally from the connecting portion  2252 . The supporting portion  2254  is parallel with the second jointing surface  220  of the second frame  22  of the second fan  20 . A slot  2255  is defined between the inner side of the engagement part  225  and the supporting portion  2254 . 
     The supporting portion  2254  defines a first groove  2256 . The first groove  2256  is connected with the slot  2255 . The flange  224  defines a second groove  2240 . The second groove  2240  is configured relatively to the first groove  2256  of the supporting portion  2254 . The fourth flange  224  extends horizontally in the second groove  2240  to form the elastic cantilever  2242 . The distal end of the elastic cantilever  2242  extends towards the engagement part  225  to form the block  2244 . The block  2244  is protruded beyond the second jointing surface  220  of the second fan  20 . Two relative sides of the elastic cantilever  2242  are spaced with the fourth flange  224  to increase elasticity of the elastic cantilever  2242 . 
     Further, the first flange  222  of the second fan  20  defines a gap  2222 . The first flange  222  extends downward in the gap  2222  to form a convex block  226 . Two relative sides of the convex block  226  are spaced apart from the flange  222  to increase elasticity of the convex block  226 . The first flange  222  near to the convex block  226  to define the buckle hole  2220 . 
     While the first fan  10  and the second fan  20  are assembled, the first jointing surface  120  of the first frame  12  of the first fan  10  moves relatively to the second jointing surface  220  of the second frame  22  of the second fan  20  along a diagonal direction of the second fan  20 . The first flange  124 , second flange  121 , and the third flange  123  of the first fan  10  are embedded in the slot  2255  of the first concave structure  230 , the second concave structure  240  of the second fan  20 . Also, the first flange  222  of the second fan  20  is embedded in the slot  1255  of the concave structure of the first fan  10 . So the first fan  10  hardly moves relatively to the second fan  20  from a direction of upward to a direction of downward. Before the first flange  124 , the second flange  121 , and the third flange  123  of the first fan  10  are embedded in the slot  2255  of the second fan  20 , the elastic cantilever  2242  of the second fan  20  is pressed downward by the first jointing surface  120  of the first frame  12  of the first fan  10 , and the elastic cantilever  1222  of the first fan  10  is also pressed upward by the second jointing surface  220  of the first frame  22  of the second fan  20 . The first flange  124 , the second flange  121 , and a third flange  123  of the first fan  10  are embedded in the slot  2255  of the second fan  20 , the elastic cantilever  2242  of the second fan  20  rebounds to fit the block  2244  in the buckle hole  1240  of the first fan  10 , and the elastic cantilever  1222  of the first fan  10  rebounds to fit the block  1224  in the buckle hole  2220  such that the first fan  10  hardly moves relatively to the second fan  20  along a horizontal direction. Further, the convex block  126  of the first fan  10  is received in the first groove  2256  of the second fan  20 , and the convex block  226  of the second fan  20  is received in the first groove  1256  of the first fan  10  such that the first fan  10  and the second fan  20  are assembled together conveniently, and the combination of the first fan  10  and the second fan  20  can save the cost of the rivets and decrease the assembling time. 
     The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of fan assembly. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes can be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above can be modified within the scope of the claims.