Patent ID: 8094175

Claim:
A thermal printer comprising: a case having an opening portion for accommodating a recording sheet therein; a thermal head for performing printing on the recording sheet; a lid member capable of opening and closing the opening portion of the case; a platen roller provided to the lid member, for feeding the recording sheet through a rotation of the platen roller while sandwiching the recording sheet with the thermal head when the lid member is in a closed state; a frame provided in the case to support the thermal head; a pair of bearing portions provided to the frame to receive both end portions of a shaft of the platen roller when the lid member is in the closed state; a pair of lock arms for automatically engaging the shaft of the platen roller with the bearing portions along with an operation of closing the lid member; and a connection mechanism for turnably connecting the platen roller to the lid member, wherein an axis of rotation of the platen roller in the connection mechanism is contained in a plane passing through a midpoint between the pair of bearing portions to be vertical to an axial direction of the bearing portions and is arranged parallel to the lid member.