A printer includes a body, a lid, a hook, and an engaging part. The body includes a holder configured to accommodate recording paper. The lid is attached to the body to be opened and closed relative to the body. The hook is attached to one of the body and the lid. The engaging part is attached to the other of the body and the lid. The engaging part is accommodated in a recess formed in the hook when the lid is closed relative to the body.

Thermal print mechanism comprising a printer chassis, a thermal printhead, a platen roller having a conductive shaft, a manner of imparting motion to put the platen roller in rotation, two lateral conductive contacts arranged on the printer chassis so as to be directly or indirectly in electrical contact with two opposite ends of the platen roller conductive shaft for conducting of electrical current, thus forming an electrical switch. At least one nonconductive part of one end of the conductive shaft interacting with one two lateral conductive contact or at least one nonconductive element mounted on said one end of the conductive shaft, is arranged so as to open and to close the switch when the platen roller is rotating.

Provided herein is a media processing device including a printhead assembly, a frame, and a biasing element. The printhead assembly includes a printhead and a printhead bracket, where the printhead assembly extends in a longitudinal direction between a first end and a second end, and where the printhead bracket includes a biasing force receiving element. The frame may be configured to receive and support the printhead assembly, where the frame includes a first portion disposed adjacent to the first end of the printhead assembly, and a second frame portion is disposed adjacent to the second end of the printhead assembly. The biasing element may extend between the first frame portion and the second frame portion, where the biasing element may engage the biasing force receiving element of the printhead assembly.

Printhead carriers and adapters are disclosed. An example disclosed print mechanism includes a printhead carrier including first and second pivot mechanisms; and a toggle assembly to, when in an engaged position, apply a force to the printhead carrier with the printhead carrier in a closed configuration, wherein the closed configuration enables printing operations, when in a disengaged position, allow the printhead carrier to transition to an open configuration via the first pivot mechanism, wherein the open configuration provides access to a printhead carried by the printhead carrier, and when in the disengaged position, allow the printhead carrier to transition to an access configuration via the second pivot mechanism, wherein the access configuration enables removal of the printhead from the printhead carrier.

A tape cartridge is detachably installed on a cartridge installation portion of a tape printing apparatus having a platen supporting shaft and a printing head. A base end of the platen supporting shaft is fixed to the cartridge installation portion at one end of the platen supporting shaft. The tape cartridge includes a platen roller, an upper bearing portion, a lower bearing portion, and a fitting portion. The platen roller includes an upper engagement portion and a lower engagement portion. The upper bearing portion rotatably supports the upper engagement portion and restricts movement of the upper engagement portion. The lower bearing portion rotatably supports the lower engagement portion and restricts movement of the lower engagement portion. A tip end of the platen supporting shaft passing through the platen roller fits in the fitting portion when the tape cartridge is installed on the cartridge installation portion.

Provided herein is a printer comprising a printing assembly. The printing assembly comprises a printhead bracket fixedly attached to the printer, a printhead that defines a groove, the printhead aligned at a first alignment, an alignment adjuster fastened between the printhead bracket and the printhead, and a plurality of fasteners operatively engaged with the alignment adjuster. The alignment adjuster comprises a gear rack that is adjacent to the printhead bracket, and a protrusion that is received by the groove of the printhead. The plurality of fasteners comprises at least one selected from a group of a lateral adjustment fastener operatively engaged with the gear rack, and a rotational adjustment fastener operatively engaged with a transverse edge of the printhead. The lateral adjustment fastener is configured to provide lateral movement to the alignment adjuster and the printhead. The rotational adjustment fastener is configured to provide rotational movement to the printhead.

A printing unit includes a thermal head, a platen roller, a head support member and a guide member. The platen roller is abutted against the thermal head with the recording sheet therebetween and rotated to feed the recording sheet. The head support member pivotably supports the thermal head around a pivot shaft so as to move the thermal head toward the platen roller. The head frame pivotably supports the head support member via the pivot shaft and rotatably supports the platen roller. The guide member guides the recording sheet between the thermal head and the platen roller. The thermal head and the guide member are positioned with respect to the head frame through the pivot shaft.

Thermal print mechanism comprising a printer chassis, a thermal printhead, a platen roller having a conductive shaft, a manner of imparting motion to put the platen roller in rotation, two lateral conductive contacts arranged on the printer chassis so as to be directly or indirectly in electrical contact with two opposite ends of the platen roller conductive shaft for conducting of electrical current, thus forming an electrical switch. At least one nonconductive part of one end of the conductive shaft interacting with one two lateral conductive contact or at least one nonconductive element mounted on said one end of the conductive shaft, is arranged so as to open and to close the switch when the platen roller is rotating.

In accordance with an embodiment, a printer comprises a housing section and a printer section. The housing section houses a roll-like image receiving medium. The printer section comprises a print head, a platen and a discharge section. The print head prints information on the image receiving medium fed from the housing section. The platen is arranged opposite to the print head and rotates around a rotating shaft. The discharge section discharges the image receiving medium passing through a space between the print head and the platen. The printer section rotates around the rotating shaft independent of the platen.

A printer apparatus includes a print head, a platen roller, and a frame, wherein printing is performed on recording paper situated between the print head and the platen roller, wherein a projection is formed at a side face of the print head, wherein a side face of the frame has a groove formed therein for receiving the projection, wherein the groove includes a first area constituting an entrance to the groove, a second area for positioning the projection and formed such as to extend in a direction intersecting with a direction in which the first area extends, and a slanted part formed between the first area and the second area, and wherein the slanted part is an edge of the groove and extends in a direction different from both a direction in which the projection moves in the first area and a direction in which the projection moves in the second area.