A method for protecting printer's ribbon driving device and structure of ribbon box

Abstract

The invention relates to a method for protecting a printer ribbon drive device and a ribbon box structure. The ribbon box structure comprises a ribbon box body. The ribbon box body is internally provided with a ribbon rolling wheel and a ribbon driven gear. A ribbon core is arranged between the ribbon rolling wheel and the ribbon driven gear in a penetrating mode. The exterior of the ribbon rolling wheel is provided with an outer gear ring meshed with the ribbon driven gear so as to drive the ribbon core. The ribbon rolling wheel is internally provided with an inner gear ring meshed with a ribbon drive gear. The tooth side face of the inner gear ring makes contact with the tooth side face of the ribbon drive gear. When abnormal situations that the ribbon is clamped and breaks occur, the ribbon box structure can effectively scatter the reactive force of on the ribbon drive device, and the purpose of protecting the ribbon drive device of a printer is achieved. The ribbon box structure is novel in structural design, simple in structure, convenient to disassemble and assemble, capable of conducting simple modification on the ribbon rolling wheel and the box body based on existing ribbon box design and capable of achieving the purpose of protecting the printer ribbon device and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of ribbon box for printers, in particular to a method for protecting a printer ribbon drive device and a structure of the ribbon box. Background technique [0002] At present, the ink ribbon drive mechanism of dot matrix printers usually uses the motor of the character carriage system to drive the ink ribbon through the ribbon transmission mechanism while driving the carriage. It is constantly improving, but for the stability of the ribbon itself, and the ribbon running too fast will increase the wear on the print head, so the ribbon running speed should not be too high, these problems combined, require the ribbon The driving mechanism needs to maintain a relatively small transmission ratio through a relatively complex gear structure in a relatively narrow space. Further, the requirement for the one-way movement of the ribbon to realize the two-way movement of the character cart, the above requirements, have...

AI Technical Summary

Problems solved by technology

[0002] At present, the ink ribbon drive mechanism of dot matrix printers usually uses the motor of the character carriage system to drive the ink ribbon through the ribbon transmission mechanism while driving the carriage. It is constantly improving, but for the stability of the ribbon itself, and the ribbon running too fast will increase the wear on the print head, so the ribbon running speed should not be too high, these problems combined, require the ribbon The driving mechanism needs to maintain a relatively small transmission ratio through a relatively complex gear structure in a relatively narrow space. Further, the requirement for the one-way movement of the ribbon to realize the two-way movement of the character cart, the above requirements, have caused the existing color Belt drive structures are deficient in sustaining damage limits

[0003] At the same time, in the actual use of the printer, due to improper operation or the quality of the ribbon itself, when the ribbon is jammed or broken, the ribbon drive device still outputs torque, and there is a large gap between the ribbon wheel that stops rotating. The instantaneous reaction force will cause serious damage to the ribbon driving device, often causing serious damage such as internal gear fracture

Furthermore, due to the multiplied increase in the driving resistance of the ribbon, the motor of the word carriage is often overwhelmed and out of step, which greatly affects the normal use and life of the printer.

like figure 1 As shown, the engagement between the existing ribbon driving gear 4 and the ribbon rubbing wheel 2 is a line contact, and the contact area is small. When the ribbon is jammed or broken, the instantaneous reaction force will affect the ribbon driving device. drive transition gears 6 and 7 causing great damage

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