KR19990029311U - Waste Toner Recovery Device of Image Forming Device - Google Patents

Abstract

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

The present invention relates to a waste toner recovery apparatus of an image forming apparatus capable of minimizing the volume of untransferred toner loaded in a waste toner loading portion.

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

The present invention provides a waste toner recovery apparatus of an image forming apparatus capable of efficiently recovering untransferred toner on a photosensitive drum.

All. The gist of the solution of the invention.

The present invention is to form a separate conductive supporting portion for supporting the non-transferred toner on the lower side of the waste toner loading portion, the supporting portion is characterized in that the hot wire coil for melting the non-transferred toner carried on the supported portion.

la. Important uses of the devise.

The present invention is applied to the waste toner loading part of the image forming apparatus.

Description

Waste Toner Recovery Device of Image Forming Device

The present invention relates to an image forming apparatus of an electrophotographic processor, and more particularly, to a waste toner collecting apparatus of an image forming apparatus capable of recovering a minimum volume of untransferred toner on a photosensitive drum loaded in a waste toner loading portion.

In general, an image forming apparatus using a general electrophotographic method includes a waste toner loading portion for forming an image on a paper and recovering the untransferred toner on the remaining photosensitive drum, and scraping the untransferred toner on the photosensitive drum. One end of the cleaning blade is fixed to the developer frame and the other end to contact the surface on the photosensitive drum.

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

In the related art, as shown in FIG. 1, the developing apparatus is provided with a photosensitive drum 101 rotating at a constant circumferential speed 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 on one side of the photosensitive drum 101.

Thereafter, a cleaning blade 114 for separating the non-transfer toner 105a on the photosensitive drum is disposed on the frame 102 at one side of the photosensitive drum 101, and in contact with the photosensitive drum 101. The waste toner loading portion 113 for loading the separated non-transfer toner 105a is integrally formed in the housing.

However, the waste toner loading part configured as described above has to be formed in a corresponding size according to the trend of increasing the capacity of the developing device, resulting in a problem that causes the downsizing of the device.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a waste toner recovery apparatus of an image forming apparatus capable of efficiently recovering untransferred toner on a photosensitive drum.

Another object of the present invention is to provide a waste toner recovery apparatus of an image forming apparatus regardless of the size of a developing device.

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 with the electrostatic latent image formed thereon. A waste toner loading part having a developing roller for supplying toner to a drum, a blade for constantly regulating the toner layer of the developing roller, a cleaning blade installed on one side of the photosensitive drum to recover untransferred toner, and An image forming apparatus of an electrophotographic processor comprising: a supply roller for supplying toner to a developing roller; and an agitator rotating at a constant circumferential speed in a toner loading portion to supply toner to the feed roller; On the lower side is formed a separate conductive supporting portion for supporting the non-transfer toner, the supporting portion The coil is wound around the coil to melt the untransferred toner loaded on the branch.

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

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

Figure 3 is a cross-sectional view of the waste toner recovery apparatus 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

6: developing roller 7: blade

8: feed roller 9: stirrer

10: toner loading part 12: transfer roller

13: Waste Toner Loading Unit 14: Cleaning Blade

15: Supporting portion 16: hot coil

17: roller 18: brush

Hereinafter, a preferred embodiment 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 subject matter of the present invention, the detailed description thereof will be omitted.

2 is a block diagram of an image forming apparatus according to a preferred embodiment of the present invention, Figure 3 is a cross-sectional view of the waste toner recovery apparatus according to a preferred embodiment of the present invention.

In the configuration of the image forming apparatus according to the present invention, as shown in Figs. 2 and 3, 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.

Thereafter, the blade 7 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.

Then, on one side of the photosensitive drum 1, a cleaning blade 14 for separating the non-transfer toner 5a on the photosensitive drum is installed on the frame 2 so as to contact the photosensitive drum 1, A waste toner loading portion 13 for loading the separated untransferred toner 5a is integrally formed in the housing.

Thereafter, a hole is formed in the lower side of the waste toner loading portion 13, and a supporting portion 15 in which the untransferred toner 5a can be supported is provided at the lower side thereof. The supporting part 15 is formed of a conductive material. Thereafter, a heating apparatus capable of heating the supporting portion 15 is installed to melt the supported untransferred toner 5a. In other words, when the power is applied to the supporting part 15, the heating coil 16 is heated. Thereafter, the lower side of the waste toner loading part 13 is installed in place so that the roller 17 wound around the outer surface of the brush 18 is rotatable in order to support the untransferred toner 5a on the supporting part 15. do. Then, on one side of the photosensitive drum 1, a transfer roller 12 for transferring an image on the sheet of paper 11 is provided.

Referring to the operation of the device as described above.

The agitator 9 of the toner loading part 10 rotates to supply the toner 5 to the supply roller 8. The feed roller 8 is engaged with the developing roller 6 and rotates to apply the toner 5 on the developing roller 6, and the toner 5 is a blade 7 provided in the developing roller 6. Is regulated to a certain height. At the same time, the photosensitive drum 1 is charged to a high voltage by the charging roller 3, and then the electrostatic latent image having a relatively low voltage is formed by the exposure unit 4. Thereafter, when the photosensitive drum 1 and the developing roller 6 are engaged to rotate, the toner 5 on the developing roller 6 is attached to the electrostatic latent image on the photosensitive drum 10, which is the photosensitive drum 1. An image is formed on the paper 11 by the transfer roller 12 engaged with one side of the. Thereafter, the non-transfer toner 5a on the photosensitive drum 1 is scraped by the cleaning blade 14 and accumulated in the waste toner loading part 13.

Thereafter, the untransferred toner 5a accumulated in the waste toner loading portion 13 is supported by the supporting portion 15 by the rotation of the roller 17 on which the brush 18 is installed. At this time, the supporting part 15 is heated by the hot coil 16. Thereafter, the supported untransferred toner 5a is melted in the heated support 15. That is, the volume of the untransferred toner is minimized.

As described above, the waste toner recovery apparatus according to the embodiment of the present invention has an effect of minimizing and removing the volume of the untransferred toner recovered, regardless of the volume of the developer.

Claims (2)

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 A waste toner loading portion having a blade which constantly regulates the toner layer of the developing roller, a cleaning blade installed on one side of the photosensitive drum to recover untransferred toner, a supply roller for supplying toner to the developing roller, and the An image forming apparatus of an electrophotographic processor in which a stirrer rotating at a constant circumferential speed in a toner loading portion to supply toner to a feed roller is configured in a constant housing, An additional conductive support portion is formed below the waste toner loading portion to support the untransferred toner, and the support portion is wound with a hot wire coil for melting the non-transferred toner supported on the supported portion. Waste toner recovery device. The method of claim 1, A toner collecting device of the image forming apparatus, characterized in that the roller wound around the toner is installed to be rotatable so as to carry the untransferred toner on the supporting part.