KR0181126B1 - Apparatus for controlling the quantity of toner of a developer - Google Patents

Abstract

[Technical field to which the invention described in the claims belong]

The present invention relates to a toner supply amount adjusting apparatus of a developing machine which can reliably adjust the toner supply amount from a supply roller to a developing roller side by adjusting the toner supply amount of a supply roller in a toner loading section step by step.

[Technical Challenges to Invent]

SUMMARY OF THE INVENTION The present invention provides a toner supply amount adjusting apparatus for a developer capable of forming a high resolution image by uniformly forming a toner image on a photosensitive drum surface.

[Summary of the solution of the invention]

The present invention includes a developer frame, a toner loading portion for storing toner in the developer frame, an agitator for electrically stirring the toner, a developing roller for developing the toner on an electrostatic latent image formed on the surface of the photosensitive drum, and a stirred toner. In the developing device comprising a supply roller for supplying the to the developing roller side and a doctor-blade for uniformly regulating the toner formed on the surface of the developing roller to a constant height, the developer frame located between the toner loading portion and the supply roller in the vertical direction A guide groove formed in the guide groove, the guide groove includes a plate inserted to adjust the amount of toner supply from the toner loading portion to the supply roller side, and screws mounted on the side of the plate to fix the plate at a predetermined height in the guide groove. It is characterized by.

[Important Uses of the Invention]

The present invention can adjust the toner supply amount from the toner loading portion to the supply roller step by step while moving the plate in the up and down direction along the guide groove of the developer frame, and can also supply the toner uniformly to the supply roller side. Uniform toner image is formed on the surface of the photosensitive drum by uniform and proper supply of toner to the developing roller, and thus high resolution images can be formed and the user can improve the reliability of the product. .

Description

Toner Supply Adjustment Device of Developer

1 is a schematic diagram showing a configuration of an image forming apparatus of a general electrophotographic processor.

2 is a cross-sectional view showing the configuration of a developer without a toner supply amount adjusting device in the prior art.

3 is a cross-sectional view showing the configuration of a developer provided with a toner supply amount adjusting device according to the present invention.

Figure 4 is a perspective view showing the shape of the toner supply amount adjusting apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

10: developer 12: toner loading part

14 toner 16: stirrer

18: guide groove 20: plate

20a: fixing part 22: screw

24: groove 26: feed roller

28: developing roller 30: doctor-blade

32: screw hole 34: developer frame

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device for an electrophotographic recording apparatus, and more particularly, to a toner supply amount adjusting device for a developing device which can reliably control the toner supply amount from a supply roller to a developing roller side by adjusting a toner supply amount from a toner loading section to a supply roller step by step. It is about.

A general printing process will be described with reference to FIG. 1 for an image forming apparatus of a commonly used electrophotographic processor.

The surface of the photosensitive drum 60 is electrically uniformly charged by the corona discharge of the charging roller 62, and the portion charged by the rotation of the photosensitive drum 60 forms an image through the exposure unit 64. When the surface of the photosensitive drum 60 is exposed by receiving an electrical signal, an electrostatic latent image is formed in a portion that receives light in an initial charged state.

At this time, the toner 72 is agitated to have a constant charge by the stirrer and is moved to the developing roller 68 side by the supply roller 70.

Thereafter, a layer of toner 72 is formed on the surface of the developing roller 68, wherein the layer of toner 72 is formed on the surface of the developing roller 68 at a uniform height by regulation of the doctor-blade 66. Lose.

Thereafter, the electrostatic latent image formed on the surface of the photosensitive drum 60 is developed into a toner 72 while passing through the developing roller 68 to become a visible image, and then the recording paper 78 mounted on the cassette 76 is fed. It is fed by the roller 80, and then the toner 72 image on the surface of the photosensitive drum 60 is transferred to the surface of the recording paper 78 by the high pressure action of the transfer roller 74.

Thereafter, the recording paper 78 passes between the heating roller 84 and the compression roller 82 of the fixing unit, and an image is fixed to the surface of the recording paper 78 by heat and pressure, and is transferred to the base 86 side. The desired printing is achieved.

On the other hand, the toner 72 remaining on the surface of the photosensitive drum 60 after passing the transfer roller 74 is removed by the cleaner 88.

Conventionally, as shown in FIG. 1, there is shown a cross-sectional view of a developing device without a toner supply amount adjusting device. The developing device 40 is formed by a toner loading part 42 for storing toner 44. A stirrer 46 for electrically uniformly stirring the toner 44 is installed at the center of the loading part 42, and the stirred toner 44 is placed on the lower side of the frame of the developer 40 with a developing roller 50. Supply roller 48 for supplying to the side) is provided, one side of the supply roller 48 is provided with a developing roller 50 for developing the toner 44 on the electrostatic latent image formed on the surface of the photosensitive drum (not shown), One side of the upper end of the developing roller 50 has a doctor-blade 52 for uniformly regulating the toner 44 formed on the surface of the developing roller 50 to a predetermined height in the developer 40 frame.

Referring to the operating state of the developing device configured as described above are as follows.

When the toner 44 is supplied to the toner loading portion 42 formed on one side of the developing device 40, the toner 44 generates static electricity by friction in the process of being stirred by the stirrer 46. To have a constant charge.

Thereafter, the stirred toner 44 is the amount of the toner 44 loaded in the toner loading part 42 by the open gap A formed at the time of manufacture of the developing device 40 for the first time. Irrespective of this, the feed roller 48 is conveyed to the side.

Thereafter, the toner 44 is supplied to the developing roller 50 by the supply ruler 48, and the toner 44 likewise comes to the amount of the toner 44 loaded in the toner loading part 42. It is conveyed to the developing roller 50 side.

Thereafter, the toner 44 formed on the surface of the developing roller 50 is uniformly regulated to a constant height by the doctor-blade 52.

Thereafter, operation is performed as shown in FIG. 1 to print.

When the above method is used, the supply amount of the toner 44 from the toner loading part 42 to the supply roller 48 is determined by the shape of the developer 40 frame which is produced for the first time, so that the open gap A is determined. The supply amount of the toner 44 conveyed from the stacking section 42 to the supply roller 48 side cannot be adjusted, so the amount of toner 44 supplied from the supply roller 48 to the developing roller 50 side is uneven (that is, excess). Toner images formed on the surface of the photosensitive drum due to supply phenomenon or short supply phenomenon are similarly formed unevenly, and thus there is a problem in that a high resolution image cannot be formed.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a toner supply amount adjusting apparatus for a developer capable of forming a high resolution image by uniformly forming a toner image on a photosensitive drum surface.

Another object of the present invention is to provide an apparatus capable of uniformly maintaining a toner supply amount from a toner stacking portion to a supply roller side.

Still another object of the present invention is to provide an apparatus capable of uniformly maintaining a toner supply amount from a feed roller to a developing roller.

In order to achieve the above object, the present invention provides a developer frame, a toner loading portion for storing toner in the developer frame, an agitator for electrically stirring the toner, and developing a toner on an electrostatic latent image formed on the surface of the photosensitive drum. A developing roller comprising: a developing roller for supplying; and a feeding roller for supplying agitated toner to the developing roller; and a doctor-blade for uniformly regulating the toner formed on the surface of the developing roller at a constant height. A guide groove formed in an up-and-down direction in a developer frame positioned between the plate, and a plate inserted in the guide groove to adjust an amount of toner supply from the toner loading portion to a supply roller, and fixing the plate at a predetermined height in the guide groove. It is characterized by consisting of a screw mounted to the side of the plate.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the toner supply amount adjusting device of the developing device according to the present invention, as shown in FIGS. 3 and 4, the toner loading portion 12 storing the toner 14 is disposed on one side of the developing device 10 in the developing frame 34. And a stirrer 16 for electrically uniformly toning the toner 14 at the center of the toner loading part 12, and one side of the developer frame 34 is supplied from the toner loading part 12. The plate 20 for adjusting the supply amount of the toner 14 conveyed to the roller 26 is installed in the front and rear directions, and at this time, the guide groove 18 is formed at one upper end of the plate 20 by the screw 22. The fixing part 20a is formed in the left and right directions so as to contact the developer frame 34 so as not to fall in the lower direction when it is fastened.

In addition, a guide groove 18 for guiding the supply amount of the toner 14 step by step is formed on one side of the developer frame 34 in a state where the plate 20 is inserted in the front and rear directions, At this time, the guide groove 18 is formed to adjust the toner 14 in four steps.

In addition, a screw hole in which the plate 22 is fastened to the guide groove 18 to fix the plate 20a to the guide groove 18 is formed in one upper surface (ie, the fixing portion) of the plate 20. The lower surface of the plate 20 is inserted into the groove 32 so that the lower surface of the plate 20 is fitted into and fixed to the lower surface of the developer frame 34. 24) is formed.

In addition, a supply roller 26 for supplying the stirred toner 14 to the developing roller 28 is installed at one lower end of the developer frame 34, and one side of the supply roller 26 is not shown. A developing roller 28 for developing the toner 14 on an electrostatic latent image formed on the drum surface is installed, and one side of the upper end of the developing roller 28 raises the toner 14 formed on the surface of the developing roller 28 at a constant height. Doctor-blade 30 is uniformly regulated by the developer frame 34 is installed.

Referring to the operation and effects of the present invention configured as described above are as follows.

When the toner 44 is supplied to the toner loading portion 42 for the first time, the plate 20 is placed in the zero state of the guide groove 18. At this time, the bottom surface of the plate 20 is caught in the groove 24 of the developer frame 34 so that the toner 14 does not flow into the supply roller 26 side.

Thereafter, the user loosens the screw 22 fastened to the screw hole 32 of the plate 20, and the plate 20 is moved in the up and down directions.

Thereafter, after the user moves the plate 20 to one state of the guide groove 18, and tightens the screw 22, the fixing portion 20a of the plate is fixed in close contact with the developer frame 34.

Thereafter, when the printing process is started, the toner 14 generates static electricity by friction in the process of being stirred by the stirrer 16 to have a constant charge.

Thereafter, the stirred toner 14 is transferred to the feed roller 26 side by the adjustment amount of the plate 20.

At this time, if the amount of toner 14 transferred from the toner loading part 12 to the feed roller 26 is insufficient, the screw 22 is removed to transfer the plate 20 to the state of the guide groove 18, and then the screw When the 22 is fastened again, the plate 20 is fixed to the developer frame 34.

Subsequently, when the amount of toner 14 transferred from the toner loading part 12 to the feed roller 26 is insufficient, the screw 22 is loosened so that the plate 20 is in the 3 or 4 state of the guide groove 18. When the screw 22 is fastened again after the transfer, the plate 20 is fixed to the developer frame 34.

Thereafter, the toner 14 is supplied to the developing roller 28 by the supply roller 26, wherein the toner 14 is likewise directed to the developing roller 28 according to the adjustment amount of the plate 20. Are transferred.

Thereafter, the toner 14 formed on the surface of the developing roller 28 is uniformly regulated to a constant height by the doctor-blade 30.

Thereafter, it is operated as shown in FIG. 1 and the printing process is performed.

According to the present invention as described above, the toner supply amount adjusting apparatus of the developer can adjust the toner supply amount from the toner loading portion to the supply roller side by step while moving the plate up, down, and directions along the guide groove of the developer frame. The toner can be supplied to the feed roller side uniformly, so that a uniform and proper toner supply to the developing roller side forms a uniform toner image on the surface of the photosensitive drum, thereby forming a high-resolution image and There is an effect that can improve the reliability of the product.

Claims (4)

A developer frame 34, a toner loading portion 12 for storing the toner 14, a stirrer 16 for electrically stirring the toner 14, and a photosensitive drum surface. A developing roller 28 for developing the toner on the formed electrostatic latent, a supply roller 26 for supplying the stirred toner 14 to the developing roller 28, a developing roller 28, and a toner formed on the surface ( In the developing device 10 composed of a doctor-blade 30 that uniformly regulates 14 to a certain height, the developing device frame 34 disposed between the toner loading part 12 and the supply roller 26 has a top and bottom sides. A guide groove 18 formed in a direction, and a plate 20 inserted into the guide groove 18 so as to adjust a supply amount of the toner 14 from the toner loading portion 12 to the supply roller 26; Screw 22 fixed to the side of the plate to fix the plate 20 to a certain height in the guide groove 18 Toner supply amount adjusting device of the developer, characterized in that consisting of. The fixing part 20a of claim 1, wherein the fixing part 20a is attached to the upper end side of the plate 20 so as to contact the developer frame 34 so as not to fall in the downward direction when it is fastened to the guide groove 18 by the screw 22. Toner supply amount adjusting device of the developer characterized in that formed. The apparatus of claim 1, wherein the guide groove (18) can adjust the amount of toner (14) supplied in four steps. The groove 24 is formed in the developer frame 34 so that the lower surface of the plate 20 is fitted into and fixed when the plate 20 is located at the lowest end of the guide groove 18. A toner supply amount adjusting device of a developing device.