Touch pen

Abstract

A touch pen includes a body and a head fixed on one end of the body and electrically connected with the body. The head includes a supporter and a contact layer. The supporter includes a fixing section and a main section. The fixing section is configured to fix the head on the one end of the body. The contact layer covers an outer surface of the main section. A space is defined in the main section.

1 . A touch pen comprising:
 a body; and   a head fixed on one end of the body and electrically connected with the body, wherein the head comprises a supporter and a contact layer, the supporter comprises a fixing section and a main section, the contact layer covers an outer surface of the main section, the fixing section is configured to fix the head on the one end of the body, and a space is defined in the main section.   
     
     
         2 . The touch pen as claimed in  claim 1 , wherein the main section comprises a wall having a thickness in a range from about 0.1 millimeter to about 2 millimeters. 
     
     
         3 . The touch pen as claimed in  claim 1 , wherein the contact layer comprises a carbon nanotube composite material, comprising a plurality of carbon nanotubes and a flexible polymer matrix, the plurality of carbon nanotubes is disposed in the flexible polymer matrix. 
     
     
         4 . The touch pen as claimed in  claim 3 , wherein the flexible polymer material comprises a material selected from the group consisting of silicone elastomer, poly methyl methacrylate, polyurethane, epoxy resin, polypropylene acid ethyl ester, acrylic acid ester, polystyrene, polybutadiene, polyacrylonitrile, polyaniline, polypyrrole, polythiophene and combinations thereof. 
     
     
         5 . The touch pen as claimed in  claim 3 , wherein some of the plurality of carbon nanotubes extrude out of the contact layer of the head. 
     
     
         6 . The touch pen as claimed in  claim 1 , wherein the supporter further comprises a liquid located in the space. 
     
     
         7 . The touch pen as claimed in  claim 6 , wherein the liquid is water or formic acid. 
     
     
         8 . A touch pen comprising:
 a body; and   a head fixed on one end of the body and electrically connected with the body, wherein the head comprises a supporter and a contact layer, the supporter comprises a fixing section and a main section, the contact layer covers an outer surface of the main section, the fixing section is configured to fix the head on the one end of the body, a space is defined in the main section, the contact layer is comprised of a graphene composite material.   
     
     
         9 . The touch pen as claimed in  claim 8 , wherein the graphene composite material comprises a flexible polymer matrix and a plurality of graphenes dispersed in the flexible polymer matrix, the plurality of graphenes connect each other and cooperatively form a conductive network. 
     
     
         10 . The touch pen as claimed in  claim 9 , wherein a weight percentage of the plurality of graphenes in the graphene composite material ranges from about 10% to about 60%. 
     
     
         11 . The touch pen as claimed in  claim 8 , wherein the flexible polymer matrix comprises a material selected from the group of polydimethylsiloxane, polypropylene, poly ethyl acrylate, poly butyl acrylate, polystyrene, polybutadiene, poly acrylonitrile and combinations thereof. 
     
     
         12 . The touch pen as claimed in  claim 8 , wherein some of the plurality of graphenes extrude out of the flexible polymer matrix. 
     
     
         13 . The touch pen as claimed in  claim 8 , wherein the body is made of metal. 
     
     
         14 . The touch pen as claimed in  claim 13 , wherein the one end of the body defines a hole having an internal thread. 
     
     
         15 . The touch pen as claimed in  claim 14 , wherein the fixing section is fixed on the one end of the body corresponding to the internal thread. 
     
     
         16 . The touch pen as claimed in  claim 8 , wherein the supporter further comprises a liquid is stuffed in the space. 
     
     
         17 . The touch pen as claimed in  claim 16 , wherein the liquid is water or formic acid. 
     
     
         18 . A touch pen comprising:
 a body; and   a head fixed on one end of the body and electrically connected with the body, wherein the head comprises a supporter and a contact layer, the supporter comprises a fixing section and a main section, the contact layer covers an outer surface of the main section, the fixing section is configured to fix the head on the one end of the body, a space is defined in the main section, the contact layer comprises a carbon nanotube composite material comprising a carbon nanotube structure and a conductive material layer coated on the carbon nanotube structure.   
     
     
         19 . The touch pen as claimed in  claim 18 , the carbon nanotube structure comprises a plurality of carbon nanotubes joined by van der Walls attractive forces, the conductive material layer is coated on each of the plurality of carbon nanotubes. 
     
     
         20 . The touch pen as claimed in  claim 18 , wherein a plurality of micropores is defined between adjacent carbon nanotubes of the plurality of carbon nanotubes.