A printer includes a paper roll holder having a shaft, a paper roll storage section, and a print unit. The paper roll storage section has a first support configured to rotatably support the shaft of the paper roll holder when the paper roll holder is inserted into a shaft core of a paper roll, and a second support configured to rotatably support the shaft of the paper roll holder when the paper roll holder is not inserted into the shaft core of the paper roll and at a position where the paper roll holder abuts an outer circumference of the paper roll when the shaft of the paper roll holder is rotatably supported by the second support. The print unit is configured to form an image on paper to be supplied from the paper roll.

A pivot mechanism for a printer is provided, the pivot mechanism comprising a pivot base and two oppositely disposed side walls extending perpendicular to the pivot base. An arched slot may be provided in each side wall. Each slot may have at least two notches, each notch defining different positions of the pivot mechanism. Two lever arms may be provided, each of the two lever arms comprising a first end and a second end, with a connecting rod connecting the first ends of the lever arms together. A locking pin may be disposed on the second end of each of the lever arms. Each of the locking pins may extend into a corresponding one of the slots and engage with a corresponding notch. A pivot rod extends through the lever arms and into or through the side walls. The printer housing is adapted to pivot on the pivot rod.

A pivot mechanism for a printer is provided, the pivot mechanism comprising a pivot base and two oppositely disposed side walls extending perpendicular to the pivot base. An arched slot may be provided in each side wall. Each slot may have at least two notches, each notch defining different positions of the pivot mechanism. Two lever arms may be provided, each of the two lever arms comprising a first end and a second end, with a connecting rod connecting the first ends of the lever arms together. A locking pin may be disposed on the second end of each of the lever arms. Each of the locking pins may extend into a corresponding one of the slots and engage with a corresponding notch. A pivot rod extends through the lever arms and into or through the side walls. The printer housing is adapted to pivot on the pivot rod.

A processing device includes a support table to support a sheet medium, a sheet cutter to cut the medium supported on the support table, a cutter holder to move the sheet cutter in a toward-away direction in which the sheet cutter moves toward and away from the support table, and a cutter transporter to move the cutter holder in a cutting direction that is orthogonal to a transport direction of the medium. The cutter holder includes a holder movable in the toward-away direction and that holds the sheet cutter, an actuator including a rod that extends or retracts, a link connected to the rod and the holder, and a rotation shaft that rotatably supports the link so that the holder moves in the toward-away direction in response to extension or retraction of the rod.

A processing device includes a support table to support a sheet medium, a sheet cutter to cut the medium supported on the support table, a cutter holder to move the sheet cutter in a toward-away direction in which the sheet cutter moves toward and away from the support table, and a cutter transporter to move the cutter holder in a cutting direction that is orthogonal to a transport direction of the medium. The cutter holder includes a holder movable in the toward-away direction and that holds the sheet cutter, an actuator including a rod that extends or retracts, a link connected to the rod and the holder, and a rotation shaft that rotatably supports the link so that the holder moves in the toward-away direction in response to extension or retraction of the rod.

The tape cartridge including a roll body around which the tape is wound in a roll shape, a cartridge case in which the roll body is accommodated and which is common to the plurality of types of the tape cartridges, a spacer portion that is provided between the cartridge ease and a first end surface which is one end surface of the roll body, and has a varying size in a tape width direction depending on the type of the tape cartridge such that a position of the center of the tape is common to the plurality of types of the tape cartridges in the tape width direction, and an urging member that is provided between the cartridge case and a second end surface which is another end surface of the roll body and urges the roll body and urges the roll body to a first end surface side.

The tape cartridge including a roll body around which the tape is wound in a roll shape, a cartridge case in which the roll body is accommodated and which is common to the plurality of types of the tape cartridges, a spacer portion that is provided between the cartridge ease and a first end surface which is one end surface of the roll body, and has a varying size in a tape width direction depending on the type of the tape cartridge such that a position of the center of the tape is common to the plurality of types of the tape cartridges in the tape width direction, and an urging member that is provided between the cartridge case and a second end surface which is another end surface of the roll body and urges the roll body and urges the roll body to a first end surface side.

A tape printer that includes: a cartridge loading portion to which a tape cartridge is loaded, the tape cartridge including a cartridge case and a platen roller accommodated in the cartridge case, the cartridge case having a positioning recess and a first detection target portion of which shape is varied depending on various types of tape cartridge; a platen shaft provided in the cartridge loading portion and inserted into the platen roller; a first detection unit provided in the cartridge loading portion, of which output changes depending on the shape of the first detection target portion; and a positioning projection provided at a position farther than the first detection unit with respect to the platen shaft in the cartridge loading portion when seen from a near side in a loading direction of the tape cartridge, and engaging with the positioning recess.

A tape printer that includes: a cartridge loading portion to which a tape cartridge is loaded, the tape cartridge including a cartridge case and a platen roller accommodated in the cartridge case, the cartridge case having a positioning recess and a first detection target portion of which shape is varied depending on various types of tape cartridge; a platen shaft provided in the cartridge loading portion and inserted into the platen roller; a first detection unit provided in the cartridge loading portion, of which output changes depending on the shape of the first detection target portion; and a positioning projection provided at a position farther than the first detection unit with respect to the platen shaft in the cartridge loading portion when seen from a near side in a loading direction of the tape cartridge, and engaging with the positioning recess.

A transport device includes a first driving roller configured to contact an outer circumferential surface of a roll body on which a medium is wound, and apply rotational torque to the roll body, a second driving roller configured to unwind the medium from the roll body, a first drive unit configured to drive the first driving roller, a second drive unit configured to drive the second driving roller, and a control unit configured to control the first drive unit and the second drive unit. The control unit controls the first drive unit, based on a magnitude of a load current flowing in the second drive unit.