Electrospinning head and electrospinning apparatus

Abstract

According to one embodiment, an electrospinning head includes a head main body and a nozzle. The nozzle projects from the head main body. A flow passage is formed inside the nozzle, and an ejection port of the flow passage is formed at a projecting end of the nozzle. A first extending portion constitutes a connecting portion of the nozzle to the head main body, and a second extending portion further projects from the first extending portion and constitutes the projecting end of the nozzle. A volume in the second extending portion excluding the flow passage is smaller than that in the first extending portion, and a dimension of the second extending portion along a projection direction is smaller than that of the first extending portion.

What is claimed is: 
     
         1 . An electrospinning head comprising:
 a head main body in which a storage hollow capable of storing a material liquid is formed in the inside; and   a nozzle made of an electrically conductive material and projecting from an outer peripheral surface of the head main body, a flow passage which communicates with the storage hollow being formed inside the nozzle, and an ejection port of the flow passage being formed at a projecting end of the nozzle from the head main body, wherein   the nozzle comprises:
 a first extending portion that constitutes a connecting portion to the outer peripheral surface of the head main body, a part of the first extending portion excluding the flow passage having a first volume; and 
 a second extending portion that further projects from the first extending portion toward a projection direction of the nozzle and constitutes the projecting end of the nozzle, a part of the second extending portion excluding the flow passage having a second volume smaller than the first volume, and a dimension of the second extending portion along the projection direction being smaller than that of the first extending portion. 
   
     
     
         2 . The electrospinning head according to  claim 1 , wherein
 an area of a cross section of the flow passage perpendicular to an extension direction of the flow passage is uniform from the connecting portion of the nozzle connecting to the outer peripheral surface of the head main body to the projecting end of the nozzle.   
     
     
         3 . The electrospinning head according to  claim 1 ,
 wherein a thickness of the second extending portion from the flow passage to the outer peripheral surface of the nozzle is smaller than that of the first extending portion.   
     
     
         4 . The electrospinning head according to  claim 3 , wherein the thickness of the second extending portion from the flow passage to the outer peripheral surface of the nozzle is uniform up to the projecting end of the nozzle. 
     
     
         5 . The electrospinning head according to  claim 4 ,
 wherein the thickness of the first extending portion from the flow passage to the outer peripheral surface of the nozzle is uniform up to a connecting portion connecting to the second extending portion.   
     
     
         6 . The electrospinning head according to  claim 4 ,
 wherein the thickness of the first extending portion from the flow passage to the outer peripheral surface of the nozzle decreases as an area in the first extending portion becomes closer to the connecting portion connecting to the second extending portion.   
     
     
         7 . A spinning apparatus comprising:
 the spinning apparatus according to  claim 1 ,   an electric power source that applies a voltage to the nozzle of the electrospinning head.