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 fixing section and a 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.

1 . A touch pen comprising:
 a body; and   a head, fixed on one end of the body, electrically connected with the body, wherein the head comprises a fixing section and a 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 with a thickness in a range from about 0.1 millimeter to about 2 millimeters. 
     
     
         3 . The touch pen as claimed in  claim 1 , wherein a material of the head comprises a carbon nanotube composite material comprising a plurality of carbon nanotubes and a flexible polymer matrix, and 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 matrix comprises a substance 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 outer surface of the main section of the head. 
     
     
         6 . The touch pen as claimed in  claim 1 , wherein the head 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, electrically connected with the body, wherein the head comprises a fixing section and a 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, and the head comprises 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 connects with each other and cooperatively forms 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 9 , wherein the flexible polymer matrix comprises a substance selected from the group consisting of polydimethylsiloxane, polypropylene, poly ethyl acrylate, poly butyl acrylate, polystyrene, polybutadiene, poly acrylonitrile and combinations thereof. 
     
     
         12 . The touch pen as claimed in  claim 9 , wherein some of the plurality of graphenes extrude out of the flexible polymer matrix. 
     
     
         13 . The touch pen as claimed in  claim 8 , wherein a material of the body is 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 head further comprises a liquid located 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, electrically connected with the body, wherein the head comprises a fixing section and a 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 head 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 an outer surface of the plurality of carbon nanotubes. 
     
     
         20 . The touch pen as claimed in  claim 19 , wherein a plurality of micropores is defined between adjacent carbon nanotubes of the plurality of carbon nanotubes.