Abstract:
A vibration absorption for a fan includes a frame, fans, positioning outer jackets, and pins, wherein the positioning outer jacket is inserted into a latching hole of fan, an outer-projected circular ring of pin is attached to a first groove of frame, and a circular ring of ping is attached to a second groove of frame, so as to reduce a vibration force of fans and to increase a flow rate and a flow speed of air flowing out of the fans.

Description:
BACKGROUND OF THE INVENTION 
   a) Field of the Invention 
   The present invention relates to a vibration absorption device for a fan, and more particularly to a vibration absorption device for a fan which is fixed in a casing of computer host and can further reduce a vibration force. 
   b) Description of the Prior Art 
   A Taiwan Utility Patent 093119732, “Fan Device for a Computer Host,” created by the present inventor is very practical. However, this conventional technique is still provided with the following shortcomings under a long term of usage and a requirement of more improvement: 
   (1) Two side walls of the container used for fixing the fans are provided with a plurality of about circular air guiding holes and frame bodies. Therefore, the space of air guiding holes is small, and the air flow blown from the fans is easily to blow toward the frame bodies other than the air guiding holes or the walls of rims of air guiding holes, which will enable a loss of efficiency of flow speed and flow rate of the air flow, and will also increase the manufacturing cost of container. 
   (2) The positioning outer jackets  30  can only transmit the vibration force of torsion generated by the fans to the container  10  and cannot directly transmit to the substrate of computer casing; therefore, the efficiency of vibration absorption needs to be improved slightly. 
   (3) The pin  44  is provided with the identical outer diameter. Therefore, when it is transfixed into the positioning hole  34  and is further tightly inserted into the pre-built latching hole  22  of the fan, the pin  44  and the positioning outer jacket  30  are not tightly fixed into the latching hole  22 . In other words, the pin  40  or the positioning outer jacket  30  is easily to be dislocated or even fallen off due to vibration, under a loose fitting condition. 
   SUMMARY OF THE INVENTION 
   The primary object of present invention is to provide a vibration absorption device for a fan which is provided with a frame having a plurality of U-shape sinks, to increase a flow rate and a flow speed of air flowing out of the fans, and to reduce a material cost of the frame. 
   Another object of the present invention is to provide a vibration absorption device for a fan, wherein positioning outer jackets can be in contact with a substrate of computer casing to further transmit a vibration force onto the substrate, thereby further reducing the vibration force upon driving the fans. 
   Still another object of the present invention is to provide a vibration absorption device for a fan, wherein a projected arc member of larger outer diameter is formed on a circumference of pin to tightly insert the positioning outer jacket into a latching hole of fan, so as to further tightly insert the pin and the positioning outer jacket into the latching hole, thereby preventing the pin or positioning outer jacket from being fallen off due to a vibration caused by a long term rotation of the fan. 
   To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  shows a perspective view of a fan of the present invention. 
       FIG. 2  shows an exploded view of components of a fan of the present invention. 
       FIG. 3  shows a local exploded view of fans installed onto a frame and a computer casing of the present invention. 
       FIG. 4  shows a top view of fans and a frame installed on a substrate of the present invention. 
       FIG. 5  shows a local cross sectional view of a fan and a frame connected with a computer casing of the present invention. 
       FIG. 6  shows another local cross sectional view of a fan and a frame connected with a computer casing of the present invention. 
       FIG. 7  shows an enlarged view of the encircled portion A in  FIG. 5 . 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Referring to  FIG. 1 ,  FIG. 2 ,  FIG. 3 , and  FIG. 4 , the present invention is to provide a vibration absorption device for a fan, which comprises a frame  10  containing a plurality of penetrated, hollow, and U-shape sinks  12  having hollow bottoms, with vertical walls  14  and a plurality of connection rods  16  transversally connected being located between the neighboring sinks  12 , ( 12 ), and a first groove  162  and a second groove  164  being located close to a corner position of neighboring walls  14  for each connection rod  16  (as shown in  FIG. 7 ); at least more than one fan  20 , a front surface and a rear surface of which are provided with a plurality of latching holes  22 , respectively (as shown in  FIG. 2 ); a plurality of positioning outer jackets  30  which are made by a flexible material, each interior end of which is formed with a hollow tube  32  having a through-hole  321  (as shown in  FIG. 7 ), and each exterior end of which is provided with a large circular ring  31  having a groove  35  in an interior thereof, with a positioning hole  34  being located in a center of the groove  35  and interconnected with the through-hole  321 ; and pins  40  which are made by a hard material, each front end of which is formed with a circular ring  42  of larger outer diameter, with an outer wall of the circular ring  42  being integrally formed with an outer-projected circular ring  421  of smaller outer diameter, an inner wall of the circular ring  42  being integrally formed with an inner projection body  422  of smaller outer diameter, an insertion pillar  44  being integrally extended toward an interior along a center of the inner projection body  422 , a projected arc member  441  of larger outer diameter being formed on a local circumference of the insertion pillar  44 , the insertion pillar  44  being inserted into the positioning hole  34  and the through-hole  321 , and the inner projection body  422  being latched into the groove  35 . 
   The hollow tube  32  of positioning outer jacket  30  is inserted into the latching hole  22  of fan  20 , the outer-projected circular ring  421  is attached in the first groove  162 , and the circular ring  42  is attached in the second groove  164 . 
   Referring to  FIG. 3  and  FIG. 6 , two side ends of the frame  10  are provided with insertion holes  15 , ( 15 ), respectively. A kit  50  made by a flexible material is provided with a vertical through-hole  52  at its center, and can be inserted into the insertion holes  15 , ( 15 ). 
   Two pillars  621 , ( 621 ) are installed on a substrate  62  of a casing  60  of computer host and are inserted into the vertical through-holes  52 , ( 52 ). The frame  10  is positioned on the substrate  62 , and a circumference of large circular ring  31  is touched on the substrate  62 . 
   Referring to  FIG. 3  and  FIG. 6 , ends of the vertical walls  14  of frame  10  are covered by an upper lid  64  of the casing  60  of computer host, wherein the soft circular ring  42  is touched on a bottom surface  641  of the upper lid  64 . 
   Referring to  FIG. 3  and  FIG. 6 , two side ends of the frame  10  are provided with the insertion holes  15 , ( 15 ), respectively. The kit  50  made by the flexible material is a tube which is provided with the through-hole  52  at its center, and a groove  54  in a shape of circular ring is located on a circumferential surface of the tube. The insertion holes  15 , ( 15 ) of frame  10  are located on a seat  17  having a certain thickness which is about the same as a height of the ring-shape groove  54 , such that the seat  17  can be latched into the ring-shape groove  54 . 
   Referring to  FIG. 7 , a difference in height exists between the first groove  162  and the second groove  164 . 
   Referring to  FIG. 3 , the sinks  12  of frame  10  are all in a hollow state, and the neighboring sinks  12 , ( 12 ) are only connected by the connection rods  16  and vertical walls  14 . Accordingly, the material for manufacturing the frame  10  will be lesser and the cost will be lower. In addition, when air flow caused by the fan  20  is flowing, the frame  10  will not interfere with the flow of air. 
   Referring to  FIG. 5  and  FIG. 7 , when the fan  20  is activated, a vibration force caused by torsion will be transmitted through the positioning outer jacket which is made by a rubber material. As circumferences of a plurality of large circular rings  31  are touched on the bottom surface  641  of upper lid  64  and a surface of substrate  62 , respectively, as well as touched on the vertical walls  14 , the vibration force will be transmitted onto the substrate  62 , upper lid  64 , and walls  14 , respectively, by the large circular rings  31  (as shown in  FIG. 6 ). During a process of transmitting the moment of vibration force, the vibration force will be greatly reduced due to that the positioning outer jacket  30  is made by the rubber material which is provided with an effect of absorbing vibration. As the kit  50  is a rubber material, the vibration force caused by the entire frame  10  will be absorbed by the kit  50 . Therefore, a tiny component of vibration force which is transmitted after absorbing the vibration by the positioning outer jacket  30  will be equally shared by (a) the walls  14 , (b) the upper lid  64 , (c) the substrate  62 , and (d) the kits  50 , respectively. Accordingly, the vibration and noise caused by the rotation of fans  20  for the entire casing  60  of computer host will be greatly reduced. 
   Referring to  FIG. 5 , the design of projected arc member  441  enables a local tube of hollow tube  32  to be expanded toward exterior, such that the entire pin  40  can be more tightly latched and positioned into the latching hole  22  without being dislocated or escaped from the latching hole  22  due to a long term of vibration. Moreover, as the circular ring  42  and the outer-projected circular ring  421  are all located on the first and second grooves  162 ,  164 , a tiny vibration force transmitted by the pin  40  will also be equally shared by the first and second grooves  162 ,  164 , to achieve a further effect of vibration absorption. 
   It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.