Thermal printer core

Abstract

A thermal printer core comprises a base frame, a mounting frame, a printing head, a moving cutter and a rubber roller assembly, the printing head is arranged on the base frame, the mounting frame is arranged on the base frame through a detaching mechanism, the moving cutter is movably arranged on the base frame, and at least one end of the moving cutter is provided with a rack part. The thermal printer core is characterized in that the detaching mechanism comprises a rotating shaft, a handle, a reset piece and a shaft rod, and a sliding block capable of driving an output gear to rotate is elastically arranged on the base frame. The stressed sliding block moves to push the output gear to rotate, and finally the moving cutter returns. Even if paper is jammed by the cutter, the moving cutter can still be smoothly driven to return due to the existence of the sliding block.

Description

technical field [0001] The invention relates to a printing device, in particular to a thermal printer core. Background technique [0002] Existing thermal printers generally include a base frame, a motor, a transmission gear assembly, a print head assembly, and a rubber roller that can be rotatably arranged on the base frame. The power input end of the transmission gear assembly meshes with the active output gear of the motor, and the power output The end meshes with the rubber roller gear located at the end of the rubber roller. The rubber roller is used to drive the printing paper to move. There is a paper feeding channel between the rubber roller and the print head assembly. The print head assembly generally includes a print head (TPH for short, Thermal Print Head), print head bracket, compression spring and compression spring supporting frame, the printing head is arranged on the printing head bracket, and the two ends of the compression spring supporting frame are arran...

AI Technical Summary

Problems solved by technology

But there are the following disadvantages: the bearing moves in the groove to a large extent, which affects the normal operation of the rubber roller

However, in actual use, when the paper jammed into the contact surface between the moving knife and the fixed knife (usually called paper jam), it is difficult to reduce the impact of paper jam on the moving knife due to the sinking of the fixed knife. The resistance of the position will cause the moving knife to fail to retreat, and the function will fail.

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