Roll shaft, recording medium supply apparatus and recording apparatus

A roll shaft hung with a bearing portion of a recording medium supply apparatus for holding a rolled recording medium, wherein the recording medium is fed by rotating the roll shaft together with the recording medium, the roll shaft comprising:

• a roll shaft body which is inserted through a core of the rolled recording medium;
• a latching portion mounted outside of one end portion of the roll shaft body, being latched with the bearing portion;
• a one-way connection portion mounted inside of the one end portion of the roll shaft body, rotatable with respect to the latching portion in only a direction opposite to a direction of feeding in the recording medium;
• and
• a torque transmission limiting portion which is mounted inside of the one end portion of the roll shaft body,
• wherein the torque transmission limiting portion releases a transmission of torque if the torque applied to the roll shaft body is not less than a predetermined value and transmits the torque if the torque is less than the predetermined value when the recording medium is fed.