Driving device for printer

Abstract

The invention discloses a driving device for a printer. The driving device comprises a side plate and an eccentric wheel which is pressed against the bottom end surface of a top plate provided with a rubber roller, wherein a convex plate is protruded on the top surface of the side plate; the eccentric wheel is arranged on the convex plate through a rotating shaft; a gear is arranged on the side wall of the eccentric wheel back to the side plate, and is engaged with a primary gear through a gear set; the primary gear is arranged at the output end of a motor which is arranged on the side plate; and a convex column is arranged on the side wall of the eccentric wheel adjacent to the convex plate, is positioned above the top surface of the side plate, and is clamped with the top surface of the side plate along with the swing of the eccentric wheel. By the driving device, the phenomena of no paper guiding effects of the rubber roller in the paper feeding process of the printer and damages to printing ink marks due to the contact between the rubber roller and a printing medium in the paper discharging process of the printer, which are caused by false operation of a lift type rubber roller mechanism due to the rotation of the eccentric wheel at a set angle after the power failure and the restarting of the printer, can be effectively prevented, and the printing quality is improved; and the driving device has a simple and reasonable structure and is convenient to mount.

Description

technical field [0001] The invention relates to a driving device, in particular to a driving device for an elevating paper pickup wheel mechanism on an inkjet printer. Background technique [0002] For the inkjet printers in the prior art, in order to prevent the paper guide from destroying the wet ink marks on the printing medium, a C-shaped paper feed path or an L-shaped paper feed path is generally used, so that the printed document avoids the pickup roller, For the paper feed channel that adopts a straight forward and front exit, in order to prevent the paper pickup roller from damaging the wet ink after printing, it is necessary to lift the paper pickup roller when the printing medium is ejected, and only rely on the upper paper guide base. The star wheel delivers the printing medium out of the printer. For this reason, there has been an elevating pickup roller mechanism that can be lifted according to the state of paper in and out of the printer. Strictly operate ...

AI Technical Summary

Problems solved by technology

[0002] For the inkjet printers in the prior art, in order to prevent the paper guide from destroying the wet ink marks on the printing medium, a C-shaped paper feed path or an L-shaped paper feed path is generally used, so that the printed document avoids the pickup roller, For the paper feed channel that adopts a straight forward and front exit, in order to prevent the paper pickup roller from damaging the wet ink after printing, it is necessary to lift the paper pickup roller when the printing medium is ejected, and only rely on the upper paper guide base. The star wheel delivers the printing medium out of the printer. For this reason, there has been an elevating pickup roller mechanism that can be lifted according to the state of paper in and out of the printer. Strictly operate according to the state of the paper in and out of the printer. Generally, a reset sensor is provided on the motor of the drive device to avoid the malfunction of the lifting pickup roller mechanism after restarting the printer when the printer is powered off. The wet ink of the printer is destroyed, but the drive device equipped with the reset sensor is complicated in structure and high in cost, which is not conducive to popularization and use on small printers

Images