Patent ID: 6994446

Claim:
A light emitting rotary double refill pen comprising an upper tube ( 1 ) and a lower tube ( 2 ), the lower tube ( 2 ) being installed with a refill switching unit ( 23 ) for switching two refills; an upper end of the refill switching unit ( 23 ) being embedded with the upper tube ( 1 ); when the upper tube ( 1 ) rotates, a rotary portion of the refill switching unit rotates to switch the two refills ( 233 , 234 ); further comprising: a rotary tube ( 11 ) in a upper tube ( 1 ) and being a hollow tube; a stop cap ( 12 ) at a top of the rotary tube ( 11 ); a transparent mask ( 13 ) embedded into the stop cap ( 12 ); a positioning tube ( 14 ) at an inner upper end of the rotary tube ( 11 ) to resist against the stop cap ( 12 ); a sleeve ( 15 ) resisting against a lower edge of the positioning tube ( 14 ) and embedded with an inner wall of the rotary tube ( 11 ); a light emitting set ( 16 ) installed at and secured to a lower end of an inner wall of the positioning tube ( 11 ); the light emitting set ( 16 ) being installed with a light emitting body ( 162 ) and a battery set ( 163 ); a spring ( 17 ) installed between the light emitting set ( 16 ) and the stop cap ( 12 ); wherein a top of the refill switching unit ( 23 ) of the lower tube ( 2 ) is fixed with an electric disk ( 24 ) and is conductive to the light emitting set ( 16 ) a top of the electric disk ( 24 ) is installed with a conductive spring ( 242 ) and a conductive plate ( 243 ); one lead of the light emitting body ( 162 ) is in contact with an electrode at a top of the battery set ( 163 ); and another lead of the light emitting body ( 162 ) extends downward to a lower side of a casing; the lead is movable with the rotation of the light emitting body ( 162 ); when the lead ( 165 ) is in contact with the conductive plate ( 243 ) on the electric disk ( 24 ), the light emitting body ( 16 ) lights up, otherwise, the lead ( 165 ) is not in contact with the conductive plate ( 243 ) on the electric disk ( 24 ), the light emitting body ( 16 ) extinguishes; an inner wall of the positioning tube ( 14 ) is formed with positioning recesses ( 141 ), an outer casing of the light emitting set ( 16 ) is installed with strips ( 161 ) which can be embedded into the positioning recesses ( 141 ); a top center of the rotary portion ( 231 ) of the refill switching unit ( 23 ) has a positioning post ( 235 ) which is non-rotational, a positioning trench ( 236 ) is formed on the positioning post ( 235 ) for receiving a rib ( 241 ) at a bottom end of the electric disk ( 24 ).