Miniature pump device

Abstract

An air pump includes a driving unit and an airflow control unit. A piston base has a first intake through hole. A piston unit has an intake valve and a bladder portion, and the intake valve is located over the first intake through hole. A first valve base is located over the piston unit. A flow guide groove of the first valve base crosses over the paired intake valve and bladder portion. The first valve base has a first output through hole. The first valve base has a circular wall surrounding the first output through hole. A first output valve is located over the first output through hole. A second valve base is coupled to the circular wall to define a compression chamber. The second valve base has a second output through hole communicating with the compression chamber. A second output valve is located over the second output through hole.

What is claimed is: 
     
         1 . A miniature air pump comprising:
 a driving unit; and   an airflow control unit driven by the driving unit to input or output airflows, wherein the airflow control unit comprises:
 a piston base having at least one first intake through hole; 
 a piston unit having at least one intake valve and at least one bladder portion, wherein the intake valve is covered over the first intake through hole; 
 a first valve base disposed over the piston unit, a bottom surface of the first valve base having at least one flow guide groove, which crosses the intake valve and the bladder portion, the first valve base having at least one first output through hole corresponding to the bladder portion, the first valve base further comprising a circular wall surrounding the first output through hole; 
 a first output valve disposed over the first output through hole; 
 a second valve base coupled to the circular wall to collectively define a compression chamber, the second valve base having at least one second output through hole communicating with the compression chamber; and 
 a second output valve covered over the second output through hole, 
   when the bladder portion is being compressed, airflows inside the bladder portion are output through the first output through hole, the first output valve, the compression chamber, the second output through hole and the second output valve sequentially,   when the bladder portion is being decompressed, airflows are introduced into the bladder portion through the first intake through hole, the intake valve and the flow guide groove sequentially.   
     
     
         2 . The miniature air pump of  claim 1 , wherein the first output valve comprises a four-petal-flower-shaped valve. 
     
     
         3 . The miniature air pump of  claim 2 , wherein the second output valve comprises an umbrella-shaped valve. 
     
     
         4 . The miniature air pump of  claim 3 , wherein the first output valve has a greater covering area than the second output valve has. 
     
     
         5 . The miniature air pump of  claim 1 , wherein the second output valve comprises an umbrella-shaped valve. 
     
     
         6 . The miniature air pump of  claim 1 , wherein the first output valve has a greater covering area than the second output valve has. 
     
     
         7 . The miniature air pump of  claim 1  further comprising an upper cover disposed over the first valve base and the second valve base, wherein the piston base, the piston unit, the first valve base and the upper cover commonly share to second intake through hole. 
     
     
         8 . The miniature air pump of  claim 7 , wherein the second valve base has a double-circular wall surrounding the second output through hole. 
     
     
         9 . The miniature air pump of  claim 8 , wherein the upper cover has an air outlet, which communicates with an area surrounded by the double-circular wall. 
     
     
         10 . The miniature air pump of  claim 9  further comprising a seal ring disposed into a seal groove of the double-circular wall. 
     
     
         11 . The miniature air pump of  claim 8  further comprising a seal ring disposed into a seal groove of the double-circular wall. 
     
     
         12 . The miniature air pump of  claim 1 , wherein the driving unit comprises a motor and an oblique linkage, the oblique linkage is coupled with a rotation axis of the motor. 
     
     
         13 . The miniature air pump of  claim 12 , wherein the oblique linkage has a plurality of connection ports, each connection port is coupled with a bottom end of the bladder portion.