Patent Document

BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a ceiling fan structure, and more particularly to a cushion pad for a ceiling fan blade. 
     2. Description of the Prior Art 
     As shown in  FIG. 1 , U.S. early publication No. 2011/0116946 discloses a fan blade mounting system. The fan blade mounting system comprises a plurality of main bodies  1 . Each main body  1  has an axial through hole  2 . The main body  1  has a pair of flanges  3  at two ends thereof. The flanges  3  are disposed around the outer periphery of the main body  1 . The flanges  3  each have a chamfer  4  at one side thereof, namely, the chamfers  4  of the flanges  3  are disposed at the two ends of the main body  1 , respectively. The main body  1  can be smoothly squeezed into a lock hole  6  of a ceiling fan blade  5  through the chamfers  4 . To cooperate with the thickness of the ceiling fan blade  5 , the main body  1  is confined in the lock hole  6  by the flanges  3 . After that, a fastening member of a blade frame is inserted into the through hole  2  of the main body  1  to fix the ceiling fan blade on the blade frame. The main body  1  is to absorb the vibration caused by the operation of the ceiling fan blade and the blade frame, providing a cushion and buffer effect to the joint of the ceiling fan blade and the blade frame so as to prevent noises and vibrations when the ceiling fan operates. 
     However, the flanges  3  provide a limit effect to the main body  1 , so the diameter of each flange  5  is greater than the inner diameter of the lock hole  6  of the ceiling fan blade  5 . Though the end of each flange  3  has the chamfer  4 , the main body  1  cannot be squeezed into the lock hole  6  of the ceiling fan blade  5  with ease. This results in consumption of time and labor to assemble the ceiling fan. The flanges  3  of the main body  1  provide a limit effect, so the distance between the flanges  3  must cooperate with the thickness of the ceiling fan blade  5 . Therefore, the producer has to manufacture various ceiling fan cushion pads in different sizes for different thicknesses of ceiling fan blades. When the ceiling fan is assembled, it is required to mate the cushion pad of the ceiling fan blade with the thickness of the ceiling fan blade. This causes great inconvenience to assemble the cushion pad of the ceiling fan blade. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a cushion pad for a ceiling fan blade. The cushion pad can be assembled easily and applied to various ceiling blades in different thicknesses to enhance its economic benefits. 
     In order to achieve the aforesaid object, the cushion pad of the present invention comprises an upper pad body and a lower pad body. The upper pad body has a first neck portion extending in an axial direction thereof. The first neck portion of the upper pad body has a first through hole which extends axially along the first neck portion to pass through the upper pad body. The upper pad body has an annular first flange at an axial upper end of the first neck portion. The first flange is disposed along an outer periphery of the first neck portion. The lower pad body has a second neck portion extending in an axial direction thereof corresponding to the first neck portion of the upper pad body. The second neck portion of the lower pad body has a second through hole which extends axially along the second neck portion to pass through the lower pad body. The lower pad body has an annular second flange at an axial lower end of the second neck portion. The second flange is disposed along an outer periphery of the second neck portion. 
     When the cushion pad of the present invention is used, the first neck portion of the upper pad body and the second neck portion of the lower pad body are respectively inserted in the upper and lower ends of a lock hole of a ceiling fan blade. The upper pad body and the lower pad body are stopped at the mouth of the lock hole through the first flange and the second flange to provide a stop effect. The upper pad body and the lower pad body can be mounted at the upper and lower ends of the lock hole easily. The cushion pad can be assembled easily and applied to various ceiling blades in different thicknesses to enhance its economic benefits. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view of a conventional cushion pad for a ceiling fan blade; 
         FIG. 2  is an exploded view according to a preferred embodiment of the present invention; 
         FIG. 3  is a sectional view of the present invention used to a plywood blade; and 
         FIG. 4  is a sectional view of the present invention used to a plastic blade. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings. 
     As shown in  FIG. 2 , a cushion pad for a ceiling fan blade according to a preferred embodiment of the present invention comprises an upper pad body  10  and a lower pad body  20 . 
     The upper pad body  10  is made of a resilient material. The upper pad body  10  has a first neck portion  11  extending in an axial direction thereof. The first neck portion  11  has a cylindrical shape. The first neck portion  11  of the upper pad body  10  has a first through hole  12  which extends axially along the first neck portion  11  to pass through the upper pad body  10 . The upper pad body  10  has an annular first chamfer  13  at an axial lower end of the first neck portion  11 . The first chamfer  13  is disposed along an outer periphery of the first neck portion  11 . The upper pad body  10  has an annular first flange  14  at an axial upper end of the first neck portion  11 . The first flange  14  is disposed along the outer periphery of the first neck portion  11 . The top surface of the first flange  14  is the surface that the first flange  14  faces the first neck portion  11  in the axial direction of the upper pad body  10 . The top surface of the first flange  14  is provided with a plurality of spaced first protrusions  15 . The first protrusions  15  are arranged radially along the upper pad body  10 . The first protrusions  15  are made of a resilient material. A deformation space is formed between the first protrusions  15  for the first protrusions  15  to be deformed when compressed. 
     The lower pad body  20  is made of a resilient material. The lower pad body  20  has a second neck portion  21  extending in an axial direction thereof. The second neck portion  21  has a cylindrical shape. The second neck portion  21  of the lower pad body  20  has a second through hole  22  which extends axially along the second neck portion  21  to pass through the lower pad body  20 . The lower pad body  20  has an annular second chamfer  23  at an axial upper end of the second neck portion  21 . The second chamfer  23  is disposed along an outer periphery of the second neck portion  21 . The lower pad body  20  has an annular second flange  24  at an axial lower end of the second neck portion  21 . The second flange  24  is disposed along the outer periphery of the second neck portion  21 . The top surface of the second flange  24  is the surface that the second flange  24  faces the second neck portion  21  in the axial direction of the lower pad body  20 . The top surface of the second flange  24  is provided with a plurality of spaced second protrusions  25 . The second protrusions  25  are arranged radially along the lower pad body  20 . The second protrusions  25  are made of a resilient material. A deformation space is formed between the second protrusions  25  for the second protrusions  25  to be deformed when compressed. 
     In order to understand the structural features, the technical means and the expected effects of the present invention, the use of the present invention is described hereinafter. 
       FIG. 3  is a schematic view of the present invention when in use. When the cushion pad of the present invention is assembled, the ends of the upper pad body  10  and the lower pad body  20 , having the first chamfer  13  and the second chamfer  23 , are respectively inserted in the same lock hole  210  of a ceiling fan blade  200  to be placed at the upper and lower ends of the lock hole  210 . The other upper pad bodies  10  and the other lower pad bodies  20  are inserted in each lock hole  210 , respectively. Because the upper pad body  10  and the lower pad body  20  respectively have the first chamfer  13  and the second chamfer  23  as well as the diameter of the first neck portion  11  of the upper pad body  10  and the diameter of the second neck portion  21  of the lower pad body  20  mate with the lock hole  210 , the first neck portion  11  of the upper pad body  10  and the second neck portion  21  of the lower pad body  20  can be squeezed into the lock hole  210  easily. The first flange  14  and the second flange  24  of the upper pad body  10  and the lower pad body  20  provide a stop effect, so that the upper pad body  10  and the lower pad body  20  are stopped at the mouth of the lock hole  210 . A fastening member  310  on a blade frame  300  is inserted into the second through hole  22  of the lower pad body  20  to fix the ceiling fan blade  200  on the blade frame  300 . By using the fastening member  310 , the upper pad body  10  and the lower pad body  20  are also fixed to the lock hole  210  steady. The upper pad body  10  and the lower pad body  20  are to absorb the vibration caused by the operation of the ceiling fan blade  200  and the blade frame  300 , providing a cushion and buffer effect for the joint of the ceiling fan blade  200  and the blade frame  300  to prevent noises and vibrations when the ceiling fan operates. It is noted that there is no need to squeeze the first flange  14  and the second flange  24 , having the diameter greater than that of the lock hole  210 , into the lock hole  210 , and the diameter of the first neck portion  11  of the upper pad body  10  and the diameter of the second neck portion  21  of the lower pad body  20  mate with the lock hole  210 , such that the first neck portion  11  of the upper pad body  10  and the second neck portion  21  of the lower pad body  20  can be squeezed into the lock hole  210  easily. Both the upper pad body  10  and the lower pad body  20  are made of a resilient material. Even if the diameter of the first neck portion  11  of the upper pad body  10  and the diameter of the second neck portion  21  of the lower pad body  20  are slightly greater than the diameter of the lock hole  210 , the first neck portion  11  of the upper pad body  10  and the second neck portion  21  of the lower pad body  20  can be compressed through their elasticity and squeezed into the lock hole  210  easily. 
     It is noted that the first flange  14  of the upper pad body  10  and the second flange  24  of the lower pad body  20  are respectively provided with the first protrusions  15  and the second protrusions  25  to be contact with the ceiling fan blade  200 , and the deformation spaces are formed between the first protrusions  15  and the second protrusions  25 . When the upper pad body  10  and the lower pad body  20  are fastened and locked, they can be slightly deformed accordingly for the ceiling fan blade  200  and the blade frame  300  to be fixed steady. 
     In addition, the upper pad body  10  and the lower pad body  20  are made of a resilient material, so they can cooperate with the thickness of the fastening member  310  of the blade frame  300 . The first through hole  12  and the second through hole  22  can be elastically expanded or contracted for the fastening members  310  in different sizes to be squeezed into the first through hole  12  and the second through hole  22 . The cushion pad of the present invention may have the first through hole  12  and the second through hole  22  in different diameters as well as the first neck portion  11  and the second neck portion  21  in different diameters to cooperate with the ceiling fan blade  200  and the blade frame  300 . 
     Referring to  FIG. 4  and  FIG. 3 , the upper pad body  10  and the lower pad body  20  are respectively placed at the upper and lower sides of the ceiling fan blade  200  to provide a cushion effect, so the present invention won&#39;t be limited to the thickness of the ceiling fan blade  200 . When the ceiling fan blade  200  is thicker, the upper pad body  10  and the lower pad body  20  have a larger distance to provide the cushion effect. When the ceiling fan blade  200  is thinner, the upper pad body  10  and the lower pad body  20  have a smaller distance to provide the cushion effect. Whatever the material and the thickness of the ceiling fan blade may be, the upper pad body  10  and the lower pad body  20  can be respectively placed at the upper and lower sides of the lock hole  210  of the ceiling fan blade  200  to provide a cushion effect. 
     Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.

Technology Category: f