Pump device

Abstract

The pump device has a driving member with one end connected to a diaphragm and another end connected to a driving mechanism. The driving mechanism side end repeats reciprocating motion along first axial direction and oscillation in second axial direction. The diaphragm side end performs the reciprocating motion in the first axial direction, and a problem is that the diaphragm easily deteriorates to be cut in a direction in which the diaphragm can be easily stretched, for example, in the second axial direction for performing oscillation. By embedding the base fabric having the fiber which extends in the second axial direction into the diaphragm, the strength in the second axial direction and the durability can be improved. By providing the index part to indicate the second axial direction, the extending direction of the fiber of the base fabric embedded within the diaphragm becomes distinguishable. In assembling the pump device, it becomes easy to place the diaphragm in a desired direction to the main body of the pump.

1 . A pump device comprising:
 a main body forming a pump chamber for intaking and discharging a fluid;   a diaphragm including
 a base material made of an elastic material which has a first surface to face the main body in a first axial direction, a second surface on a side opposite to the first surface, and a peripheral edge area supported by the main body, 
 a base fabric, provided embedded in the base material, at least having a first fiber which extends in a second axial direction perpendicular to the first axial direction, and 
 an index part, provided to the base material, to indicate the second axial direction; and 
   a driving part including
 a driving mechanism and 
 a driving member,
 which driving member has a first end connected to the second surface and a second end to be connected to the driving mechanism, and 
 which driving mechanism allows the driving member to reciprocate along the first axial direction while allowing the driving member to oscillate in the second axial direction. 
 
   
     
     
         2 . The pump device according to  claim 1 , wherein
 the driving member further has a fixture which includes
 a support surface to face the first surface, and 
 a shaft part formed on the support surface, which shaft part penetrates the base material and is to be coupled to the first end, and 
   the index part is formed to an opening in which the shaft part penetrates.   
     
     
         3 . The pump device according to  claim 2 , wherein
 the index part is a linear portion, perpendicular or parallel to the second axial direction, forming a part of the opening.   
     
     
         4 . The pump device according to  claim 2 , wherein
 the index part is a notch which is connected to the opening in a direction perpendicular or parallel to the second axial direction.   
     
     
         5 . The pump device according to  claim 1 , wherein
 the base fabric further includes a second fiber which extends in a third axial direction crossing the second axial direction within the first surface.