JP2000330054A - Optical scanner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dust from sticking to an optical scanner through a simple structure by providing a laser light source, light deflector, scanning optical system, and optical members installed on the outer periphery of the housing, and by vibrating the optical members. SOLUTION: The scanner is equipped with a polygon motor 2 which is a light deflector for deflecting outgoing light from a laser light source, optical glass 3 as a light emitting port installed facing the outer periphery of the housing 1, vibrator 4, transmitting member 5 for transmitting the vibration of the vibrator 4 or the like. The rotation of the vibrator 4 is then transmitted to the glass 3 as the vibration through a joint. The vibrator 4 is constructed by providing a cam plate for a motor that is used in a paper or the like for telling incoming call through the vibration, vibrating the transmitting member 5 by the rotation of the cam plate at the time of no disturbance to image formation such as the time when no optical scanning is performed, and vibrating the glass 3 on the transmitting member 5. The vibration of the glass 3 makes it hard for dust to stick to the surface. As a result, without increase in the number of parts to a great extent and without increase in the cost, the surface of the optical members can be always kept clean.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical scanning apparatus, and more particularly, to an electrophotographic apparatus such as a laser printer for forming an electrostatic latent image by scanning a photosensitive member with laser light emitted from a light emitting element. The present invention relates to an optical scanning device mounted on a computer.

[0002]

2. Description of the Related Art In a conventional electrophotographic apparatus using an electrophotographic process, a dry developer used for developing an electrostatic latent image and paper dust accompanying the conveyance of a printing paper are generated. Dust such as chemicals and dust entering from the outside of the device are scattered and floating. These scattered and floating dusts and the like adhere to the optical members of the optical scanning device and hinder the formation of a latent image. For this reason, for example, in the technology described in Japanese Patent Application Laid-Open No. 7-325463, a cleaning member is provided which separates the apparatus main body into an upper frame and a lower frame, and is provided in contact with a shield glass located at a light emission port of the optical system unit. It rotates in conjunction with the rotation of the upper frame, and cleans an optical component provided at the light exit of the optical system unit.

Further, in the technique described in Japanese Patent Application Laid-Open No. 7-325644, a frame for separating a photosensitive drum from an optical system is located near the light-transmitting dustproof plate on the photosensitive drum side.
There is an image forming apparatus which is provided with static electricity generating means which operates with rotation of the photosensitive drum and uniformly generates positive static electricity on the entire surface.

[0004]

However, in the case of the above-mentioned prior art, there is a problem that the cleaning cannot be performed unless a complicated mechanism is provided for cleaning the optical parts and the like of the optical scanning device and the opening and closing operation of the device is not accompanied. there were.

It is an object of the present invention to solve the above-mentioned problems and to provide means capable of preventing dust from adhering to an optical scanning device with a simple structure.

[0006]

According to the present invention, there is provided an optical scanning apparatus comprising a laser light source, an optical deflector, a scanning optical system, and an optical member provided on the outer periphery of a housing. In the above, the optical member is vibrated so that dust and the like hardly adhere to the surface of the optical member.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic explanatory view of one embodiment of the present invention, and FIG. 2 is an explanatory view showing a configuration of a vibrator 4 and a dustproof glass 3 showing a main part of the present invention.

In FIG. 1, reference numeral 1 denotes an optical housing, 2 denotes a polygon motor which is an optical deflector for deflecting light emitted from a laser light source (not shown), and 3 denotes a light provided on the outer periphery of the housing 1. The optical glass of the exit port, 4 is a vibrator, and 5 is a transmission member for transmitting the vibration of the vibrator 4. The rotation of the vibrator 4 is transmitted as vibration to the glass 3 via the cam-shaped joint 6. Reference numeral 7 denotes a scanning optical system.

In the embodiment, the vibrator 4 is provided with a cam plate provided on a motor used in a pager or the like for transmitting an incoming call by vibrating. Although the glass 3 on the transmission member is vibrated when there is no hindrance, a galvanomirror using a piezo element, a ceramic vibrator or the like may be used. The vibration of the glass 3 makes it difficult for dust to adhere to the surface.

[0011]

As described above, according to the present invention,
It is possible to expect an effect that the surface of the optical member can be kept clean at all times without significantly increasing the number of parts and increasing the cost. An optical scanning device that does not require maintenance can be provided by adopting a scanning optical system of a measuring device other than an electrophotographic printing machine.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an optical scanning device according to one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of an optical scanning device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical housing 2 Polygon motor 3 Glass 4 Transducer 5 Transmission member 6 Joint

Claims (1)

[Claims] 1. An optical scanning device comprising a laser light source, an optical deflector, a scanning optical system, and an optical member provided on an outer periphery of a housing. An optical scanning device characterized in that it is difficult to adhere.