Printer apparatus and printer head

摘要

A disclosed device printer apparatus includes a recording sheet conveying block holding a recording sheet and including a light emitting element, and a first light receiving element; a head block printing characters, graphics or the like on the recording sheet including a second light receiving element positioned to face the light emitting element so as to directly receive the light; and a control circuit connected to the light emitting element, the first light receiving element, and the second light receiving element, wherein the control circuit determines, when the light is detected by the second light receiving element, that the recording sheet does not exist between the light emitting element and the second light receiving element, and when the light is not detected by the second light receiving element and is detected by the first light receiving element, that the recording sheet exists.

主权项

1. A printer apparatus comprising:
a recording sheet conveying block, the recording sheet conveying block includes
a conveying element for conveying a recording sheet,a light emitting element configured to emit light, anda first light receiving element that is configured to receive the light; and a head block that is movable relative to the recording sheet conveying block between a closed state and an opened state, a gap between the recording sheet conveying block and the head block when the head block is in the closed state forms a path for conveying the recording sheet, the head block includes
a printer head configured to print characters on the recording sheet, anda second light receiving element provided at a position facing the light emitting element across the path and configured to receive the light; and a control circuit connected to and controlling an operation of the light emitting element, the first light receiving element, and the second light receiving element, wherein the control circuit determines, when the light is detected by the second light receiving element, that the recording sheet does not exist in the path, and wherein the control circuit determines, when the light is not detected by the second light receiving element and is detected by the first light receiving element, that the recording sheet exists in the path.