Rotary-torque adjuster, ink-ribbon conveying mechanism, and printer

An ink-ribbon conveying mechanism that adjusts rotary torque of a take-up spool, the ink-ribbon conveying mechanism comprising:

• a feed spool that feeds an ink ribbon;
• the take-up spool linked with a rotary shaft and rotating integrally with the rotary shaft so as to take up the ink ribbon;
• a plurality of clutch disks rotatably attached to the rotary shaft;
• a plurality of presser components attached to the rotary shaft and rotating integrally with the rotary shaft, the presser components sandwiching opposite surfaces of the clutch disks by a predetermined pressure;
• a driver that drives the clutch disks;
• and
• a drive transmission unit that makes a selection from among the plurality of clutch disks so as to transmit a driving force from the driver to the selected one or more clutch disks,
• wherein the drive transmission unit changes the selection of the clutch disks to which the driving force from the driver is to be transmitted so as to change the rotary torque of the take-up spool.

A printer comprising:

• an ink-ribbon conveying mechanism that adjusts rotary torque of a take-up spool,
• wherein the ink-ribbon conveying mechanism includes
• a feed spool that feeds an ink ribbon used for printing towards a head,
• the take-up spool linked with a rotary shaft and rotating integrally with the rotary shaft so as to take up the ink ribbon,
• a plurality of clutch disks rotatably attached to the rotary shaft,
• a plurality of presser components attached to the rotary shaft and rotating integrally with the rotary shaft, the presser components sandwiching opposite surfaces of the clutch disks by a predetermined pressure,
• a driver that drives the clutch disks, and
• a drive transmission unit that makes a selection from among the plurality of clutch disks so as to transmit a driving force from the driver to the selected one or more clutch disks,
• wherein the drive transmission unit changes the selection of the clutch disks to which the driving force from the driver is to be transmitted so as to change the rotary torque of the take-up spool.