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Laser scanning unit and laser printer

A technology of laser scanning and laser beam, which is applied in the direction of optical components, optics, instruments, etc., can solve problems such as unevenness and discrete toner cartridges, and achieve the effects of ensuring normal work, reducing production costs and production cycles

Pending Publication Date: 2022-01-21
北京高德品创科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is the problem that discrete and non-uniform points will be formed on the surface of the toner drum in the technical solution that omits the Fθ converging lens existing in the prior art, thereby providing a laser scanning unit and a laser printer

Method used

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  • Laser scanning unit and laser printer
  • Laser scanning unit and laser printer

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Embodiment 1

[0026] Such as figure 1 As shown, the embodiment of the present invention provides a laser scanning unit, which includes: a laser generator 1 , a lens group 2 , a polygon mirror motor 3 , a converging mirror 4 and a drum 5 .

[0027] Specifically, in the embodiment of the present invention, the laser generator 1, the lens group 2, the polygon mirror motor 3 and the toner drum 5 are arranged along the optical path, wherein the converging reflector 4 is arranged between the polygon mirror motor 3 and the toner drum 5 on the light path. After the laser beam generated by the laser generator 1 passes through the converging reflector 4, the converging reflector 4 is adapted to reflect the laser beam to the surface of the toner drum 5, and form a discrete and uniform pattern on the surface of the toner drum 5. point.

[0028] In this way, the converging reflector 4 with lower cost is used to converge the laser beam reflected by the polygon mirror motor 3 through the converging refl...

Embodiment 2

[0037] An embodiment of the present invention also provides a laser printer, which includes: the laser scanning unit as described in any one of the above embodiments.

[0038] In this way, the converging reflector 4 with lower cost is used to converge the laser beam reflected by the polygon mirror motor 3 through the converging reflector 4 to form uniform dots on the surface of the toner drum 5, thereby ensuring the normal operation of the laser printer. At the same time, compared with the Fθ converging lens, the converging mirror 4 can reduce a certain production cost and production cycle.

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PUM

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Abstract

The invention discloses a laser scanning unit and a laser printer. The laser scanning unit comprises a laser generator, a lens group, a polygon mirror motor and a selenium drum which are arranged along a light path; a converging reflecting mirror is arranged in a light path between the polygon mirror motor and the selenium drum; and laser beams generated by the laser generator pass through the converging reflector and then are suitable for forming discrete and uniform points on the surface of the selenium drum. According to the arrangement, the converging reflecting mirror with lower cost is adopted, the laser beams reflected by the polygon mirror motor are converged through the converging reflecting mirror, and uniform points can be formed on the surface of the selenium drum, so that the normal work of the laser printer is ensured. Meanwhile, compared with an Ftheta convergent lens, the converging reflector can reduce certain production cost and production cycle.

Description

technical field [0001] The invention relates to the technical field of laser printers, in particular to a laser scanning unit and a laser printer. Background technique [0002] There is a laser scanning unit inside the laser printer, wherein the laser scanning unit can irradiate the toner drum to form an electrostatic latent image through its own laser, polygon mirror, reflective mirror and Fθ converging lens. Due to the complex optical design of the FTL lens, the development cycle is long; and the functional curved surfaces on both sides of the Fθ converging lens are high-order curved surfaces, the mold precision is extremely high, and the manufacturing cost is high. [0003] In view of this, a technical solution for omitting the Fθ converging lens appears in the prior art. However, with this technical solution, discrete and uneven spots will be formed on the surface of the toner drum, affecting the normal use of the printer. Contents of the invention [0004] Therefore...

Claims

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Application Information

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IPC IPC(8): G03G15/043G02B26/12
CPCG03G15/0435G02B26/121
Inventor 唐波炯范志国
Owner 北京高德品创科技有限公司