KR19990050147A - Image forming apparatus of electrophotographic processor - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus of an electrophotographic processor having an apparatus for supplying an appropriate amount of toner loaded in a toner holder to a feed roller.

I. The technical problem that the invention is trying to solve.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus of an electrophotographic processor having a device for supplying an appropriate amount of toner to a feed roller and conveying an untransferred toner loaded in the feed roller to a toner loading portion to mix with fresh toner. .

All. Summary of the Solution of the Invention.

The present invention is installed in the housing located on the upper side of the supply roller in such a way that the regulatory film formed with a plurality of holes inclined in the downward direction, the lower side of the regulating film has an inclined surface upwardly to the left and right around the axis of rotation so as to contact the regulating film. The ejector is rotatably installed to supply the toner to the feed roller selectively through the holes of the regulating film by the rotation of the ejector.

la. Important use of the invention.

The present invention is an apparatus for regulating a constant amount of supply toner in an image forming apparatus.

Description

Image forming apparatus of electrophotographic processor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming device of an electrophotographic processor, and more particularly, to an image forming device including an apparatus for supplying an appropriate amount of toner loaded in a toner to a feed roller. It is about.

1 is a block diagram of an image forming apparatus according to an embodiment of the prior art.

In the conventional image forming apparatus, as shown in FIG. 1, a photosensitive drum 101 rotating at a constant circumferential speed is installed in a housing 102 having a constant shape. Thereafter, in order to charge the photosensitive drum 101 at a high voltage, a charging roller 103 is mounted on one surface of the photosensitive drum 101. In addition, an exposure unit 104 for exposing a predetermined image to the photosensitive drum 101 charged by the charging roller 103 is formed on one side of the photosensitive drum 101. Thereafter, a developing roller 106 is mounted on one side of the photosensitive drum 101 to attach the toner 105 to a portion where the electrostatic latent image is formed by the exposure part 104 of the photosensitive drum 101. Thereafter, one side of the blade 107 is fixed to the housing 102 in order to form a constant toner 105 layer on the surface of the developing roller 106. The other side of the blade 107 is mounted in contact with the developing roller 106. Then, on the other side of the developing roller 106, a supply roller 108 for supplying the toner 105 to the developing roller 106 is provided. In addition, an agitator 109 is provided at one side of the feed roller 108 to stir the toner 105 and to supply the feed roller 108. The feed roller 108 and the stirrer 109 are installed in the toner loading portion 110 in the housing 102. Thereafter, a transfer roller 112 for transferring an image on the sheet of paper 111 is provided below the photosensitive drum 101.

However, as described above, when the toner loaded in the toner loading unit is stirred with only an agitator, the external additives of the toner particles are separated by the pressure of the agitator, which causes the charging performance to be degraded and the quality of the product is deteriorated. There was this. In addition, due to excessive supply of toner by the stirrer, untransferred toner is accumulated on the lower side of the supply roller, thereby solidifying, thereby lowering supply performance.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide an image forming apparatus of an electrophotographic processor having an apparatus for supplying an appropriate amount of toner to a supply roller.

It is another object of the present invention to provide an image forming apparatus of an electrophotographic processor having an apparatus for transferring an untransferred toner loaded on a feed roller to a toner loading portion to mix with fresh toner.

In order to achieve the above object, the present invention provides a photosensitive drum for forming an image, a charging roller for applying a high voltage to the photosensitive drum, an exposure unit for forming an electrostatic latent image on the photosensitive drum, and a photosensitive on which the electrostatic latent image is formed. A developing roller for supplying toner to the drum, a blade for constantly regulating the toner layer of the developing roller, a supply roller for supplying the toner to the developing roller, and a constant circumferential speed in the toner loading portion for supplying toner to the supply roller. An image forming apparatus of an electrophotographic processor in which a stirrer rotating in a predetermined direction is formed in a constant housing, wherein a housing having a plurality of holes is installed to be inclined downward in a housing located above the supply roller, and a lower side of the regulatory film. The ship has an inclined surface that is upwards and to the left and right about the axis of rotation in contact with the control film. It is characterized in that the ejector is rotatably installed to selectively supply the toner to the feed roller by the rotation of the ejector.

1 is a block diagram showing an image forming apparatus according to an embodiment of the prior art.

2 is a block diagram showing an image forming apparatus according to an embodiment of the present invention.

3 is a perspective view of a control film according to an embodiment of the present invention.

Figure 4 is a perspective view of the ejector according to an embodiment of the present invention.

Figure 5 is a block diagram showing a state when the toner is not discharged according to an embodiment of the present invention.

6 is a block diagram showing a state when toner is discharged according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

1: photosensitive drum 2: housing

3: charging roller 4: exposed part

5: toner 6: developing roller

7: blade 8: feeding roller

9: stirrer 10: toner loading part

12: Transfer Roller 13: Regulated Film

14: ejector

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Figure 2 is a block diagram showing an image forming apparatus according to a preferred embodiment of the present invention, Figure 3 is a perspective view of a control film according to a preferred embodiment of the present invention, Figure 4 is a preferred embodiment of the present invention Is a perspective view of the ejector according to the.

5 is a block diagram showing a state when the toner is not discharged according to a preferred embodiment of the present invention, Figure 6 is a configuration showing a state when the toner is discharged according to a preferred embodiment of the present invention It is also.

In the configuration of the image forming apparatus according to the present invention, as shown in Fig. 2, first, a photosensitive drum 1 rotating at a constant circumferential speed is provided in a housing 2 having a constant shape. Thereafter, a charging roller 3 is mounted on one surface of the photosensitive drum 1 to charge the photosensitive drum 1 at a high voltage. In addition, an exposure unit 4 for exposing a constant image to the photosensitive drum 1 charged by the charging roller 3 is formed on one side of the photosensitive drum 1. Thereafter, a developing roller 6 is mounted on one side of the photosensitive drum 1 to attach the toner 5 to a portion where the electrostatic latent image is formed by the exposure part 4 of the photosensitive drum 1.

Then, the blade 7 according to the present invention is fixed to the housing 2 so as to form a constant toner 5 layer on the surface of the developing roller 6. Thereafter, a supply roller 8 for supplying the toner 5 to the developing roller 6 is provided on the other side of the developing roller 6. In addition, an agitator 9 for stirring the toner 5 is installed at one side of the feed roller 8. The stirrer 9 is rotated counterclockwise (reverse direction) to transfer the toner 5 upward. The feed roller 8 and the stirrer 9 are installed in the toner loading portion 10 in the housing 2.

Thereafter, the restricting film and the ejector according to the present invention are installed above the feed roller of the toner loading portion. As shown in FIGS. 2 and 3, the regulation film is fixed to the housing 2 located above the supply roller 8 inclined downward and extends toward the stirrer 9 by a predetermined length. In addition, the regulation film 13 is formed with a plurality of holes 13a in a proper direction in the longitudinal direction.

Subsequently, as shown in FIGS. 2 and 4, an ejector 14 having an inclined surface 14a upwardly oriented about a rotation axis to be in contact with the regulation film 13 is disposed below the regulation film 13. Install in a rotatable manner. That is, as the ejector 14 rotates, the toner 5 is selectively supplied to the supply roller 8 from the hole 13a formed in the regulating film 13. In addition, the ejector 14 transfers the untransferred toner loaded on the feed roller 8 toward the toner loading portion 10 and rotates counterclockwise (reverse direction) to mix with the fresh toner 5.

At this time, the discharge force of the discharger 14 is configured to be smaller than the stirring force of the stirrer (13).

Thereafter, a transfer roller 12 for transferring an image on the sheet of paper 11 is provided below the photosensitive drum 1.

The operation of the apparatus as described above will be described with reference to FIGS. 5 and 6.

First, the toner 5 loaded in the toner loading part 10 is transferred to the upper side of the regulating film 13 by the stirrer 9. At this time, since the ejector 14 rotates in a counterclockwise direction, the regulating film 13 is lifted upward while receiving the elasticity on the inclined surface 14a of the ejector 14. Then, when the ejector 14 is positioned in the vertical direction, the hole 13a of the regulation film 13 which is blocked by the inclined surface 14a of the ejector is opened and the toner 5 is supplied to the supply roller 8 located on the lower side. ) Is supplied in a fixed amount. Then, when the ejector 14 is positioned in the horizontal direction, the inclined surface 14a located on the other side of the ejector 14 closes the hole 13a of the regulating film 13 to supply the toner to the supply roller 8. Stop it. That is, the amount of toner 5 supplied to the feed roller 8 can be adjusted according to the rotational speed of the ejector 14.

At the same time, the untransferred toner loaded on the feed roller 8 is transferred to the toner loading part by the rotation of the ejector 14, mixed with the fresh toner 5, and then again agitated by the stirrer film 13. It is supplied to the upper side of.

Thereafter, the transferred toner 5 is attached to the developing roller 6 by frictional charging of the supply roller 8 and the developing roller 6. Thereafter, the toner 5 attached to the developing roller 6 is regulated to a certain height on the developing roller by receiving the height restriction of the blade 7. On the other hand, after the photosensitive drum (not shown) is charged to the high voltage by the charging roller, the electrostatic latent image is formed by the exposure unit. Thereafter, the toner 5 attached to the developing roller 6 is attached to an electrostatic latent image formed on the photosensitive drum, and an image is formed while paper is fed between the photosensitive drum and the transfer roller. The image formed on the sheet is fixed and discharged to the discharge unit.

As described above, the image forming apparatus according to the embodiment of the present invention constitutes a separate toner supply device to regulate the supply amount of the toner, toner recovery, and the smooth discharge of the toner with excessive replenishment. Is minimized and the solidification of the untransferred toner loaded on the feed roller is eliminated ghost phenomenon appearing on the image and at the same time has an effect of obtaining a high quality image.

Claims (5)

A photosensitive drum for forming an image, a charging roller for applying a high voltage to the photosensitive drum, an exposure portion for forming an electrostatic latent image on the photosensitive drum, a developing roller for supplying toner to the photosensitive drum having the electrostatic latent image formed thereon, and The blades which constantly regulate the toner layer of the developing roller, the supply roller for supplying the toner to the developing roller, and the stirrer which rotates at a constant circumferential speed in the toner loading part for supplying the toner to the supply roller are formed in the constant housing. In the image forming apparatus of the photo processor, A housing in which a plurality of holes are formed to be inclined downward in a housing located above the supply roller; The discharge film is rotatably installed on the lower side of the regulation film so as to be in contact with the regulation film so as to rotate left and right about the axis of rotation. The toner is selectively supplied from the holes of the regulation film by the rotation of the ejector. An image forming apparatus of an electrophotographic processor, characterized in that. The method of claim 1, And the holes of the regulating film are formed in a predetermined size and number depending on the amount of toner supply. The method of claim 1, And the stirrer rotates in a reverse direction to supply toner to an upper surface of the regulating film. The method of claim 1, And the ejector rotates counterclockwise to transfer the untransferred toner loaded in the feed roller to the toner loading part. In claim 1, And the stirring force of the stirrer is greater than the discharge force of the ejector.