Laser printing machine

Abstract

The invention provides a laser printing machine which is characterized in that a shell is internally provided with a powder box mounting position for mounting a powder box, wherein a contact probe mechanism is mounted at the tail end of the powder box mounting position; the contact probe mechanism comprises a base which is fixedly connected to the powder box mounting position; the base is provided with a plurality of contact probes and a circuit board; the plurality of contact probes are electrically connected with the circuit board; the contact probe mechanism further comprises a protection part, a limiting part and a spring; the protection part is provided with a plurality of grooves; the grooves are provided with openings; each contact probe is mounted in one groove through the corresponding opening; the protection part is matched with the limiting part; the protection part can slide along the limiting part in the extending directions of the grooves; the first end of the spring is abutted against the protection part and the second end of the spring is abutted against the powder box mounting position. The contact probes are supported and protected by the grooves so as to be prevented from deforming or cracking when contacting electric contacts, so that the durability and the stable performance of the contact probe mechanism are improved.

Description

technical field [0001] The invention relates to the field of electronic imaging printers, in particular to a laser printer equipped with a stylus mechanism. Background technique [0002] An electrophotographic printer is a device that uses the principle of electrophotographic imaging to form an image on a recording material, and the image forming device includes a copier, a printer, a facsimile machine, and the like. Process cartridges used in image forming equipment are generally divided into two types, one is an integrated toner cartridge that includes a developing roller as a developing device and a photosensitive drum, and the other is a separate toner cartridge that separates the photosensitive drum to the outside. Both cartridges are detachably mounted in the main body of the image forming apparatus. [0003] A typical image imaging device is a laser printer. Laser printers are one of the most widely used image imaging devices. Laser printers use the physical and chem...

AI Technical Summary

Problems solved by technology

[0007] However, since the contact pin 15 protrudes from the base so as to be better electrically connected to the electrical contacts, but when the powder container 11 is taken out from the powder container mounting position, the contact pin 15 will always be exposed on the base 14, so the exposed contact pin 15 is easily polluted by the residual carbon powder in the movement, so that the electrical connection performance of the contact pin 15 is reduced. Deformation or breakage of the stylus leads to failure of the entire laser printer

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