Patent ID: 6217240
Filing Date: 2001-04-17
Classification: B41J

Abstract:
A device for controlling head pressure in a miniature printer, comprising:a base plate;a shaft mounted to said base plate;a head frame;a printer head installed on said head frame;a platen roller for carrying a printing paper in contact with said printer head;a supporting bracket connected through elastic members to a rear face of said head frame, said head frame and supporting bracket including at opposite ends thereof respective hinge parts for pivotal mounting to said shaft; anda locking piece for preventing rearward pivoting of said supporting bracket when in a locked position; and whereinsaid hinge parts include elongate slots through which said shaft extends for permitting the ends of said head frame and supporting bracket to move back and forth; andsaid head frame has disposed at the center thereof a frame supporting part which is supported against back and forth movement with respect to said shaft while allowing the opposite ends of said head frame to move back and forth in opposite directions relative to said shaft.