KR0174681B1 - Toner Supply Unit in Developer - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus of an electrophotographic processor, and more particularly, to a toner supply apparatus in a developing apparatus for smoothing a flow of toner for forming an image so as to obtain a clear and clean image.

2. The technical problem to be solved by the invention

SUMMARY OF THE INVENTION The present invention provides a toner supplying device in a developing device in which a toner on an upper side of a feed roller installed inside a developing unit is moved at a constant cycle to uniformly charge the toner, and make the image density uniform so that a clean and clear image can be obtained. have.

3. Summary of Solution to Invention

According to the present invention, a developing device of an image forming apparatus includes a toner loading portion for storing toner at an upper portion, an agitator for transferring the toner to a feeding roller at one side of the toner loading portion, and fusion of toner at the agitator and toner above the supply roller. The film is fixedly attached so as to move at regular intervals, and a supply roller for supplying the stirred toner to the developing roller is installed in a lower frame inside the developing unit 51, and one side of the supply roller is on the surface of the photosensitive drum. A developing roller for developing the toner on the formed electrostatic latent image is provided, and a blade for uniformly regulating the toner at a predetermined height is installed at an upper end of the developing roller, and between the developing roller 29 and an upper portion of the supply roller 28. It is characterized in that the auxiliary stirrer 50 for continuously crushing the stagnant toner is provided.

4. Important uses of the invention

The toner supply apparatus in the developing device of the image forming apparatus using the electrophotographic developing method.

Description

Toner Supply Unit in Developer

1 is a block diagram of a conventional developer toner supply apparatus.

2 is a block diagram of a developer toner supply device of another conventional embodiment.

3 is a state in which the stirrer of FIG. 2 is rotated to supply toner by film.

4 is a block diagram of a toner supply device in a developing device in the image forming apparatus of the present invention.

5 is an operating state diagram of the agitator of the present invention.

6 is a block diagram of the auxiliary stirrer of the present invention.

7 is a block diagram of a toner supply apparatus in the developing device of another embodiment of the present invention.

8 is a configuration of the auxiliary feed roller of FIG.

9 is a block diagram of a toner supply apparatus in the developing device of still another embodiment of the present invention.

10 is a block diagram of a toner supply roller of FIG.

* Explanation of symbols for main parts of the drawings

21: developing unit 22: toner loading

23: lower frame 24: toner

25: stirrer 26: film

27: toner supply port 28: supply roller

29: developing roller 30: photosensitive drum

31: blade 50: auxiliary stirrer

60: auxiliary supply roller 70: toner supply roller

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus of an electrophotographic processor, and more particularly, to a developer toner supply apparatus which allows a smooth flow of toner for forming an image to obtain a clear and clean image.

An electrophotographic developing method is most widely used as an image forming apparatus, and an image forming apparatus using a conventional electrophotographic developing method includes a recording apparatus such as a copying machine, a laser beam printer, a general paper fax machine, and the like. As is well known, an image forming apparatus using an electrophotographic method forms an invisible electrostatic latent image on the surface of a photosensitive drum. Then, an image is formed on the surface of the photosensitive drum on which the electrostatic latent image is formed as toner to visualize it, and then transferred and recorded on a sheet of paper.

As described above, the image forming apparatus includes a photosensitive drum 30 rotating at a constant circumferential speed in an electrophotographic processor as shown in FIG. 1, and an electric charge layer uniformly formed on an upper surface of the photosensitive drum 30. The charging roller 32 to be charged electrically and the exposure portion 33 to form an electrostatic latent image on the surface of the electrically charged photosensitive drum 30 are provided, and the photosensitive drum 30 is disposed at the lower end of the photosensitive drum 30. A transfer roller 34 for transferring an image of the toner 24 on the surface of the paper 35 is provided, and one side of the photosensitive drum 30 is provided with a developing unit 21 for forming an image. A toner loading portion 22 for storing the toner 24 is formed at an upper end of the 21, and an agitator 25 for electrically and uniformly stirring the toner 24 is installed at the center of the toner loading portion 22. The lower frame 23 inside the developing unit 21 has the A supply roller 28 is provided for supplying the toner 24, which is half, to the developing roller 29, and one side of the supply roller 28 provides the toner 24 to the electrostatic latent image formed on the surface of the photosensitive drum 30. A developing roller 29 for developing is installed, and a blade 31 for uniformly regulating the toner 24 formed on the surface of the developing roller 29 to a constant height is installed at an upper end of the developing roller 29.

In the image forming apparatus of the electrophotographic processor configured as described above, when the toner 24 is supplied to the toner loading portion 22 formed at the upper end of the developing unit 21, the toner 24 is agitated by the stirrer 25. The static electricity is generated by the friction to have a constant charge, the stirred toner 24 is supplied through the toner supply port 27 of the toner loading portion 22 to supply the roller 28 of the lower frame 23 The toner 24 formed on the surface of the developing roller 29 is uniformly regulated to a certain height by the regulating blade 31.

At this time, the surface of the photosensitive drum 30 is electrically uniformly charged by the electrical action of the charging roller 32, and the portion charged by the rotation of the photosensitive drum 30 receives an image through the exposure unit 33. When the surface of the photosensitive drum 30 is exposed by receiving an electrical signal to form, an electrostatic latent image is formed in a portion that receives light in an initial charged state, and at this time, a developing roller in which the electrostatic latent image of the photosensitive drum 30 is rotated ( It is developed by the toner 24 passing through 29, and becomes a visible image. Subsequently, the recording paper 35 mounted on the paper feeding cassette is fed by the paper feeding roller so that the toner 24 image on the surface of the photosensitive drum 30 is transferred to the recording paper 35 by the high pressure action of the transfer roller 34. .

Then, the recording paper 35 is conveyed and passes between the heating roller and the pressing roller of the fixing unit, so that an image is fixed on the surface of the recording paper 35 by heat and pressure, and the printed paper is transferred to the output tray side. Printing takes place.

However, in the conventional image forming apparatus, when the toner is agitated by the stirrer installed in the toner loading portion of the developing machine and transferred to the lower feed roller side, the feed roller supplies the toner to the developing roller side. Since the toner is supplied to the toner, the charging of the toner is not uniform, resulting in a decrease in the density of the image.

In order to solve the above problems, the toner supply apparatus in the developing device of the image forming apparatus is developed as another embodiment.

A charging roller 32 for uniformly charging the electric charge layer on the upper surface of the photosensitive drum 30 and an exposure part 33 for forming an electrostatic latent image on the surface of the electrically charged photosensitive drum 30 are provided. The lower end of the photosensitive drum 30 is provided with a transfer roller 34 for transferring an image of the toner 24 on the surface of the photosensitive drum 30 onto the paper 35. One side of the photosensitive drum 30 is provided. A developing unit 21 for forming an image is provided, and a toner loading unit 22 for storing the toner 24 is formed at an upper end of the developing unit 21, and a toner is rotated at the center of the toner loading unit 22. A stirrer 25 is provided to electrically and uniformly agitate the 24, and the film 41 is fixed to the fixing plate 40 of the toner loading part 22 so as to be caught at the end of the rotating stirrer 25. The agitated toner 24 is developed in the lower frame 23 inside the developer 21. A supply roller 28 for supplying to the roller 29 side is installed, and one side of the supply roller 28 develops the toner 24 on the electrostatic latent image formed on the surface of the photosensitive drum 30. Is installed, the blade 31 for uniformly regulating the toner 24 formed on the surface of the developing roller 29 to a predetermined height at the upper end of the developing roller 29.

In the image forming apparatus of the electrophotographic processor configured as described above, when the toner 24 is supplied to the toner loading portion 22 formed at the upper end of the developing unit 21, the toner 24 is agitated by the stirrer 25. Static electricity is generated by the friction to have a constant charge, the stirred toner 24 is supplied to the lower side through the toner supply port 27 of the toner loading portion 22 is supplied to the supply roller of the lower frame 23 ( 28 is supplied to the developing roller 29 side by rotation.

At this time, the stirrer 25 of the toner loading part 22 rotates in a clockwise direction, and the film 41 is rotated by pushing upward the lower end of the film 41 fixed to the fixed plate 40 at the end of the stirrer 25. When the end of the agitator 25 is out of the film 41 while being bent upward, the film 41 of the fixing plate 40 moves downward by its tension and is supplied through the toner supply port 27 as shown in FIG. The toner 24 is pushed and supplied onto the roller 28. Therefore, some toner on the upper side of the feed roller 28 is moved to the developing roller 29 side.

At this time, when the supply roller 28 rotates and the toner 24 is supplied to the developing roller 29 side, the toner 24 on the surface of the developing roller 29 is uniformly regulated to a certain height by the upper blade 31. . At this time, the surface of the photosensitive drum 30 is electrically uniformly charged by the electrical action of the charging roller 32, and the portion charged by the rotation of the photosensitive drum 30 has an electrostatic latent image through the exposure part 33. While the electrostatic latent image of the photosensitive drum 30 is passed through the developing roller 29 to be rotated, it is developed by the toner 24 to become a visible image. Subsequently, the recording paper 35 mounted on the paper feeding cassette is fed by the paper feeding roller so that the toner 24 image on the surface of the photosensitive drum 30 is transferred to the recording paper 35 by the high pressure action of the transfer roller 34. .

Then, the recording paper 35 is conveyed and passes between the heating roller and the pressing roller of the fixing unit, so that an image is fixed on the surface of the recording paper 35 by heat and pressure, and the printed paper is transferred to the output tray side. Printing takes place.

However, in the conventional image forming apparatus, the agitator installed in the toner loading part of the developing machine rotates, and when the toner is agitated, the agitator is pushed upward and rotated so that the film is bent upward so that the film is bent upward on the agitator side, and the end of the agitator is When the film is out of the film, the film is moved downward by its tension, and the toner is agitated while being pushed to the upper side of the feed roller. At this time, some toner is moved to the developing roller side, but a lot of toner is supplied in a stagnant state. The charging of the toner is not uniform and the density of the image is lowered. The distance between the stirrer and the film must be precisely adjusted so that the film must be separately fixed to the inside of the toner loading part. There is a problem with ascension.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to move the toner at the upper side of the supply roller installed in the developing machine at a constant cycle so that charging of the toner is constant and image density is made uniform. An object of the present invention is to provide a toner supply device in a developer for obtaining a clear and clear image.

Another object of the present invention is to provide a toner supplying device in a developing device capable of preventing toner agglomeration and fusion in a toner loading part of a developing device.

Still another object of the present invention is to provide an auxiliary feed roller between the feed roller of the developer and the upper part of the developing roller so that smooth toner supply can occur between the developing roller and the feed roller, and improve the chargeability to make the image density uniform. An object of the present invention is to provide a toner supply device in a developer for obtaining a clear and clear image.

Another object of the present invention is to install a toner supply roller in the toner supply port of the toner loading unit, supply the agitated toner to the supply roller side, recover the toner stagnated on the upper side of the supply roller, and supply new toner constantly. To provide a toner supply device in a developer.

The present invention for achieving the above object is a developing device of the image forming apparatus, a toner loading portion for storing the toner in the upper portion, an agitator for transferring the toner to the supply roller on one side to the toner loading portion and A supply roller for supplying the agitated toner to the developing roller side is installed in the lower frame of the developer, and one side of the supply roller is provided with a developing roller for developing the toner on an electrostatic latent image formed on the surface of the photosensitive drum. A blade for uniformly regulating the toner at a constant height is installed at the upper end of the roller, and an auxiliary stirrer for supplying continuously grinds the stagnant toner between the developing roller and the supply roller is provided.

Embodiments according to the present invention will now be described in detail with reference to the accompanying drawings.

4 is a block diagram of a toner supply device in a developing device in the image forming apparatus of the present invention. 5 is a state diagram in which the stirrer film is in close contact with the toner loading portion of the developer toner supply apparatus to prevent fusion of the toner, and FIG. 6 is a configuration diagram of the auxiliary stirrer of the present invention.

The configuration of the toner supply apparatus in the developing device of the image forming apparatus according to the present invention will be described with reference to FIGS. 4 to 6 as described above.

It should be noted that the same function as that of the conventional code in the drawings used the same code in the present invention.

The developing unit 21 of the image forming apparatus has a toner loading portion 22 for storing toner, and a lower end of one side of the toner loading portion 22 forms a toner supply port 27, and the toner loading portion 22 An agitator 25 is rotatably installed to agitate the toner 24 and transfer it to the feed roller 28 through the toner supply port 27. The agitator 25 is fused and supplied to the feed roller. (28) The film 26 is fixedly attached to move the upper toner at a predetermined cycle, and the stirred toner 24 is supplied to the developing roller 29 to the lower frame 23 inside the developing unit 21. A supply roller 28 is provided, and one side of the supply roller 28 is provided with a developing roller 29 for developing the toner 24 on an electrostatic latent image formed on the surface of the photosensitive drum 30. At the upper end of the 29, a blade 31 for uniformly regulating the toner 24 to a certain height is provided. An auxiliary stirrer 50 for continuously crushing stagnant toner is installed between the developing roller 29 and the supply roller 28, and the auxiliary stirrer 50 is a film attached to the rotating stirrer 25 ( It is installed to rotate by the touch of 26).

The auxiliary stirrer 50 may be installed so that the central axis is rotated on both frames, and the auxiliary stirrer 50 is placed between the developing roller 29 and the upper part of the supply roller 28 to rotate the film ( 26) is installed to rotate by touching.

The auxiliary stirrer 50 is made of a film having a cross pinwheel shape.

The film 26 fixed to the stirrer 25 has a thin and flexible tension, and when the stirrer 25 is rotated, it may be bent while contacting the inner surface of the toner loading part 22 and the stirrer 25 may be toner. When placed in the supply port 27, the film 26 may rotate while touching the auxiliary stirrer 50 above the supply roller 28 through the toner supply port 27.

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

In the image forming apparatus using the electrophotographic developing method, the toner 24 is agitated by the stirrer 25 in a state where the toner 24 is supplied to the toner loading portion 22 formed at the upper end of the developing unit 21. Static electricity is generated to have a constant charge, the stirred toner 24 is supplied to the lower side through the toner supply port 27 of the toner loading portion 22 and the supply roller 28 of the lower frame 23. Toner is supplied to the developing roller 29 side by rotation.

At this time, since the stirrer 25 of the toner loading part 22 is rotated clockwise as shown in FIG. 5, the film 26 fixed to the stirrer 25 is in contact with the inner surface of the toner loading part 22 and the end is bent and rotated. Therefore, the toner 24 is prevented from being fused to the inner surface of the toner loading part 22 and the toner is stirred.

When the stirrer 25 is rotated in the above state and the film 26 is positioned at the toner supply port 27, the film 26 is bent for self-tension in a bent state, and the film 26 is toner as shown in FIG. Since the toner is supplied through the supply port 27 and is rotated by touching the auxiliary stirrer 50 installed above the supply roller 28, the auxiliary stirrer 50 is rotated counterclockwise by the force touched by the film 26. As a result, the toner on the upper side of the developing roller 29 and the supply roller 28 is agitated to uniformly charge and prevent the image density decrease due to stagnation of the toner.

When the film 26 of the stirrer 25 is rotated and passes the toner supply port 27 as described above, the film 26 rotates while the film 26 is in contact with the inner surface of the toner loading part 22 so that the toner loading part rotates. (22) The toner 24 is prevented from fusion and agglomeration on the inner surface, and the toner is stirred. As the stirrer 25 continues to rotate, the agglomeration of the toner 24 is prevented, and static electricity is generated by friction to generate a constant charge, thereby supplying the toner 24 to the supply roller 28 and periodically supplying the auxiliary stirrer 50. It is possible to prevent toner congestion on the upper side of the feed roller 28 by rotating while touching.

At this time, the toner around the roller is supplied to the developing roller 29 by the rotation of the feed roller 28 installed in the lower frame 23, and the toner 24 having uniform charging characteristics is always supplied to the developing roller 29. Lose.

In the above state, the toner 24 on the surface of the developing roller 29 is uniformly regulated to a constant height by the upper blade 31. At this time, the surface of the photosensitive drum 30 is electrically uniformly charged by the electrical action of the charging roller 32, and the portion charged by the rotation of the photosensitive drum 30 has an electrostatic latent image through the exposure part 33. While the electrostatic latent image of the photosensitive drum 30 is passed through the developing roller 29 to be rotated, it is uniformly developed with the toner 24 to change into a visible image. Subsequently, the recording paper 35 mounted on the paper feeding cassette is fed by the paper feeding roller so that the toner 24 image on the surface of the photosensitive drum 30 is transferred to the recording paper 35 by the high pressure action of the transfer roller 34. .

After that, the recording paper 35 is transported and passes between the heating roller and the pressing roller of the fixing unit, so that an image is fixed on the surface of the recording paper 35 by heat and pressure, and the printed paper is transported to the discharge tray. Printing is achieved with a clear image.

According to the present invention as described above, when the stirrer is fixedly attached to the stirrer installed in the toner loading portion of the developing machine is rotated by the stirrer is located in the toner supply port, the film is rotated by touching the auxiliary stirrer on the upper side of the feed roller through the toner supply port By moving the toner on the upper side of the feed roller at regular intervals to prevent the toner from stagnating, the charging of the toner is constant, the image density of the developing roller is uniform, and a clear and clear image can be obtained. There is an advantage that can prevent aggregation and fusion.

7 and 8 illustrate a configuration and an operation effect as another embodiment of the present invention.

The developing unit 21 of the image forming apparatus has a toner loading portion 22 for storing toner, and a lower end of one side of the toner loading portion 22 forms a toner supply port 27, and the toner loading portion 22 An agitator 25 is rotatably installed to agitate the toner 24 and to transfer it to the feed roller 28 through the toner supply port 27, and the lower frame 23 inside the developer 21. There is a supply roller 28 for supplying the stirred toner 24 to the developing roller 29 side, one side of the supply roller 28 is the toner 24 on the electrostatic latent formed on the surface of the photosensitive drum 30 A developing roller 29 for developing) is installed, and a blade 31 for uniformly regulating the toner 24 at a predetermined height is installed at an upper end of the developing roller 29, and supplied with the developing roller 29. An auxiliary feed roller 60 is installed between the valleys on the upper portion of the roller 28 so as to prevent toner from stagnation. It will cost.

The auxiliary feed roller 60 is rotated by the developing roller 29 and the supply roller 28 which is simply placed between the developing roller 29 and the top of the supply roller 28 to rotate, and its weight Due to this, the toner is pushed between the valleys to facilitate toner charging.

The auxiliary supply roller 26 can be installed in a round bar, it is possible to install a rubber member wrapped in the round bar.

The stirrer 25 may be attached to the stirrer 25 so that the stirrer 25 may contact the inner surface of the toner loading part 22 when the stirrer 25 is rotated to prevent toner cohesion and fusion.

In the image forming apparatus using the electrophotographic developing method configured as described above, the toner 24 is supplied by the stirrer 25 while the toner 24 is supplied to the toner loading part 22 formed at the upper end of the developing unit 21. It is agitated to generate static electricity by friction to have a constant charge, the stirred toner 24 is supplied to the lower side through the toner supply port 27 of the toner loading portion 22 and the lower frame 23 The toner is supplied to the developing roller 29 side by rotation to the feed roller 28.

At this time, since the stirrer 25 of the toner loading part 22 is rotated clockwise as shown in FIG. 7, the toner 24 of the toner loading part 22 is agitated by the stirrer 25 and is supplied through the toner supply port 27. The feed roller 28 is supplied above. At this time, the supply roller 28 is supplied to the developing roller 29 is rotated in the counterclockwise direction while rotating in the counterclockwise direction.

As described above, since the supply roller 28 is rotated to supply the supplied toner to the developing roller 29 side, the auxiliary supply roller 60 located between the supply roller 28 and the top of the developing roller 29 has a supply roller. (28) and the developing roller 29 is rotated in the counterclockwise direction so that it rotates in the clockwise direction naturally by the friction force thereon.

At this time, since the auxiliary supply roller 60 rotates in the toner 24 accumulated on the supply roller 28, the toner charging is supplied between the supply roller 28 and the developing roller 29 by the toner charging. Make it smooth.

Since the auxiliary feed roller 60 on the upper side is also rotated by the rotation of the feed roller 28 installed on the lower frame 23 as described above, the toner around the upper side of the feed roller 28 is supplied to the developing roller 29 side to develop the roller. The toner 24 having a uniform charging characteristic is always supplied to the 29 so that the toner moves toward the developing roller 29 at a predetermined period to make the charging of the toner 24 uniform.

In the above state, the toner 24 on the surface of the developing roller 29 is uniformly regulated to a constant height by the upper blade 31. At this time, the surface of the photosensitive drum 30 is electrically uniformly charged by the electrical action of the charging roller 32, and the portion charged by the rotation of the photosensitive drum 30 has an electrostatic latent image through the exposure part 33. While the electrostatic latent image of the photosensitive drum 30 is passed through the developing roller 29 to be rotated, it is uniformly developed with the toner 24 to change into a visible image. Subsequently, the recording paper 35 mounted on the paper feeding cassette is fed by the paper feeding roller so that the toner 24 image on the surface of the photosensitive drum 30 is transferred to the recording paper 35 by the high pressure action of the transfer roller 34. .

After that, the recording paper 35 is transported and passes between the heating roller and the pressing roller of the fixing unit, so that an image is fixed on the surface of the recording paper 35 by heat and pressure, and the printed paper is transported to the discharge tray. Printing is achieved with a clear image.

In the image forming apparatus as described above, when the toner supplied by the rotation of the stirrer in the developer toner loading unit is supplied through the toner supply port, the feed roller rotates counterclockwise to transfer the new toner to the developing roller to the auxiliary feed roller. Allow toner to be supplied. At this time, the auxiliary supply roller is not separated by the rotational direction of the two rollers without any support, and even if it is released due to the movement of the developer or the main body, it is possible to immediately restore the original state. On the contrary, when the developer is shaken, there is no problem because the grinding effect of the toner is increased by the flow of the auxiliary feed roller.

According to the present invention as described above, the auxiliary supply roller is rotatably installed between the developing roller in the developing roller and the upper valley of the supply roller so that the toner is hardened by the temperature in the developing device. The toner is prevented from being stagnant and the toner is supplied to the developing roller by the auxiliary feed roller, so that the toner is uniformly charged and the solidification is prevented so that the image density of the developing roller is uniform so that a clear and clear image can be obtained. There is this.

9 and 10 illustrate a configuration and an effect as still another embodiment of the present invention.

The developing unit 21 of the image forming apparatus has a toner loading unit 22 for storing toner, the toner loading unit 22 having an agitator 25 for stirring the toner 24 and one side lower end of the toner. A supply port 27 is formed, and the toner supply port 27 is supplied with the toner 24 of the toner loading part 22 to the supply roller 28 side, and the toner on the supply roller 28 is again supplied with the toner loading part ( 22, a toner supply roller 70 is collected, and one side of the supply roller 28 installed on the lower frame 23 develops the toner 24 on an electrostatic latent image formed on the surface of the photosensitive drum 30. The developing roller 29 is installed, and the blade 31 for uniformly regulating the toner 24 to a certain height is installed at the upper end of the developing roller 29.

The toner replenishment roller 70 is rectangular and forms a wing having a plurality of holes, and the central axis is installed on both frames to rotate with a gear or a belt. The hole is formed in a square.

The toner supply roller 70 may be installed to be driven through the idle gear from the drive gear of the supply roller 28 by installing a gear on one side central shaft, the drive shaft of the supply roller 28 and the toner supply roller 70 ) Is installed to drive by connecting the central axis of the belt.

In the image forming apparatus using the electrophotographic developing method configured as described above, the toner 24 is supplied by the stirrer 25 while the toner 24 is supplied to the toner loading part 22 formed at the upper end of the developing unit 21. It is agitated to generate static electricity by friction to have a constant charge, the stirred toner 24 is supplied through a toner supply roller 70 installed in the toner supply port 27 of the toner loading part 22 28 is supplied to the side, and the toner is supplied to the developing roller 29 by rotation to the supply roller 28 of the lower frame 23.

At this time, since the stirrer 25 of the toner loading part 22 is rotated clockwise as shown in FIG. 9, the toner 24 of the toner loading part 22 is stirred by the stirrer 25. At this time, while the toner supply roller 70 installed in the toner supply port 27 rotates in the clockwise direction, the toner stirred in the toner loading unit 22 is stirred again and supplied to the supply roller 28, and the supply roller 28 The toner stagnated on the upper side is recovered to the toner loading part 22 by the wings of the toner supply roller 70. Therefore, the toner is prevented from stagnating on the upper side of the supply roller 28, and the toner supply roller 70 continues to rotate, so that the toner at both ends of the toner loading part 22 continues to move to prevent the toner from solidifying. The toner supplied by the rotation of the toner supply roller 70 as described above is supplied to the developing roller 29 in which the toner 24 is rotated counterclockwise while the supply roller 28 rotates counterclockwise.

The toner 24 accumulated on the upper side of the supply roller 28 as described above is recovered again into the toner loading unit 22 by the rotating toner supply roller 70 and new toner is supplied to the supply roller 28 side. It preserves the original properties as it is and makes the charging of the toner uniform.

At this time, the toner is supplied to the developing roller 29 by the rotation of the feed roller 28 installed in the lower frame 23 so that the toner 24 having a uniform charging characteristic is always supplied to the developing roller 29 so that the toner is fixed. The charging of the toner 24 is made uniform by moving the developing roller 29 toward the cycle.

In the above state, the toner 24 on the surface of the developing roller 29 is uniformly regulated to a constant height by the upper blade 31. At this time, the surface of the photosensitive drum 30 is electrically uniformly charged by the electrical action of the charging roller 32, and the portion charged by the rotation of the photosensitive drum 30 has an electrostatic latent image through the exposure part 33. While the electrostatic latent image of the photosensitive drum 30 is passed through the developing roller 29 to be rotated, it is uniformly developed with the toner 24 to change into a visible image. Subsequently, the recording paper 35 mounted on the paper feeding cassette is fed by the paper feeding roller so that the toner 24 image on the surface of the photosensitive drum 30 is transferred to the recording paper 35 by the high pressure action of the transfer roller 34. .

After that, the recording paper 35 is transported and passes between the heating roller and the pressing roller of the fixing unit, so that an image is fixed on the surface of the recording paper 35 by heat and pressure, and the printed paper is transported to the discharge tray. Printing is achieved with a clear image.

As described above, the toner supply roller is installed in the toner supply port of the developer toner loading unit to prevent the toner from stagnation on the upper side of the supply roller, and the toner is uniformly charged and solidified by supplying the toner by stirring the supply roller. By preventing the uniformity of the image density of the developing roller, there is an effect of obtaining a clear and clear image.

According to the present invention as described above, the supply roller in the developing device as an image forming apparatus and the toner which is solidified and solidified on the upper side of the developing roller are moved at regular intervals to make the charging of the toner constant, and the image density uniform, thereby providing a clear and clear image. It is to provide a toner supply device in a developer so as to obtain.

Claims (23)

In the image forming apparatus using the electrophotographic developing method, the developing unit 21 has a toner loading unit 22 for storing toner, and the toner loading unit 22 is stirred with the toner 24 to supply the toner supply port. An agitator 25 is rotatably installed to transfer the feed roller 28 to the feed roller 28 through the 27, and the film 26 is fixed to the agitator 25 to move the toner above the feed roller 28 at a predetermined cycle. And a supply roller 28 for supplying the agitated toner 24 to the developing roller 29 to the lower frame 23 of the developing unit 21, and one side of the supply roller 28 A developing roller 29 for developing the toner 24 on an electrostatic latent image formed on the surface of the photosensitive drum 30 is provided, and a blade for uniformly regulating the toner 24 at a constant height on an upper end of the developing roller 29. A developer toner supply device, characterized in that 31 is provided. The developing toner supply device according to claim 1, wherein the film (26) fixed to the stirrer (25) has a thin and flexible tension. The film 26 fixed to the stirrer 25 may be bent and brought into contact with the bottom surface of the toner loading part 22 when the stirrer 25 is rotated to take the bottom toner 24 in the rotational direction. A developer toner supply unit, characterized in that the installation. The film 26 is unfolded through the toner supply port 27 when the stirrer 25 is located at the toner supply port 27, and suddenly turns off the toner 24 located above the supply roller 28. A developing toner supply device, characterized in that it is installed to be pushed to move toward the developing roller (29). In the image forming apparatus using the electrophotographic developing method, the developing unit 21 has a toner loading unit 22 for storing toner, and a lower end of one side of the toner loading unit 22 forms a toner supply port 27, The toner loading part 22 is rotatably provided with an agitator 25 for stirring the toner 24 and transferring the toner supply port 27 to the supply roller 28 through the toner supply port 27. The film 26 is fixedly attached to the fusion of the toner and moves the toner above the supply roller 28 at a predetermined period. The agitated toner 24 is attached to the lower frame 23 inside the developer 21. Is provided with a supply roller 28 for supplying to the developing roller 29 side, and one side of the supply roller 28 develops the toner 24 on the electrostatic latent image formed on the surface of the photosensitive drum 30. ) Is installed on the upper end of the developing roller 29 to uniformly toner 24 to a constant height Toner supply in the developing device, characterized in that the blade 31 for regulating the cradle is installed, and an auxiliary stirrer 50 for continuously crushing the stagnant toner between the developing roller 29 and the supply roller 28. Device. 6. The toner supply apparatus according to claim 5, wherein the auxiliary stirrer (50) is installed to rotate the central axis on both frames. The method of claim 5, wherein the auxiliary stirrer 50 is installed so as to be rotated by touching the film 26 of the stirrer 25 is rotated by placing between the developing roller 29 and the upper feed roller 28. A toner supply device in a developing device. 6. The developing toner supply device according to claim 5, wherein the auxiliary stirrer (50) is made of a film having a cross pinwheel shape. The film 26 fixed to the stirrer 25 has a thin and flexible tension, and when the stirrer 25 is rotated, the film 26 contacts the inner surface of the toner loading part 22 and may be bent. When the stirrer 25 is located in the toner supply port 27, the film 26 may rotate while touching the auxiliary stirrer 50 above the supply roller 28 through the toner supply port 27. Developer toner supply. In the image forming apparatus using the electrophotographic developing method, the developing unit 21 has a toner loading unit 22 for storing toner, and a lower end of one side of the toner loading unit 22 forms a toner supply port 27, The toner loading part 22 is rotatably provided with a stirrer 25 for stirring the toner 24 and transferring it to the feed roller 28 through the toner supply port 27. The lower frame 23 is provided with a supply roller 28 for supplying the stirred toner 24 to the developing roller 29 side, one side of the supply roller 28 is an electrostatic latent image formed on the surface of the photosensitive drum 30 A developing roller 29 for developing the toner 24 is installed on the upper surface of the developing roller 29, and a blade 31 for uniformly regulating the toner 24 at a constant height is installed at the upper end of the developing roller 29. The toner is stagnated by installing the auxiliary feed roller 60 between the 29 and the top of the feed roller 28. Toner supply apparatus in a developer, characterized in that configured to be prevented. 11. The toner supply apparatus according to claim 10, wherein the auxiliary supply roller (60) is installed so as to be rotated by simply placing it between the developing roller (29) and the top of the supply roller (28). The method of claim 11, wherein the auxiliary supply roller 60 is rotated by the developing roller 29 and the supply roller 28 that rotates, so that the toner is pushed between the bones to facilitate toner charging due to its own weight. A toner supply device in a developing device, characterized in that it is installed. 11. The toner supply apparatus according to claim 10, wherein the auxiliary supply roller (26) is a round bar. 11. The toner supply apparatus according to claim 10, wherein the auxiliary feed roller (26) is wrapped with a rubber member in a round bar. The method of claim 10, wherein the stirrer 25 is attached to the stirrer 25 is installed so that the stirrer 25 is in contact with the inner surface of the toner loading portion 22 when the stirring 25 is rotated to prevent toner agglomeration and fusion. A toner supply device in a developing device. In the image forming apparatus using the electrophotographic developing method, the developing unit 21 has a toner loading unit 22 for storing toner, and an agitator for stirring the toner 24 in the toner loading unit 22. 25 and one lower end form a toner supply port 27, and the toner supply port 27 supplies the toner 24 of the toner loading part 22 to the supply roller 28 and supplies the upper side of the supply roller 28. A toner supply roller 70 for recovering the toner back to the toner loading part 22, and one side of the feed roller 28 installed on the lower frame 23 has an electrostatic latent image formed on the surface of the photosensitive drum 30. A developing roller 29 for developing the toner 24 is provided, and a blade 31 for uniformly regulating the toner 24 at a constant height is provided at an upper end of the developing roller 29. Toner Supply. 17. The toner supply apparatus according to claim 16, wherein the toner supply roller (70) has a rectangular shape and has wings formed with a plurality of holes. 18. The toner supply apparatus according to claim 17, wherein the holes are formed in quadrangles, respectively. 17. The toner supplying apparatus according to claim 16, wherein the toner supply roller (70) is installed such that a central axis is installed at both frames to be connected to a drive gear to rotate. 20. The toner supply apparatus according to claim 19, wherein the toner supply roller (70) is installed to be driven through an idle gear from a drive gear of the feed roller (28) by installing a gear on one side central axis. 17. The toner supply apparatus according to claim 16, wherein the toner supply roller (70) is installed such that a central axis is installed at both frames to be connected to a belt and rotate. 22. The toner supplying apparatus according to claim 21, wherein the toner supply roller (70) is installed to be rotated by being connected to the shaft pulley of the supply roller (28) by installing a pulley on one central axis. The film 26 fixed to the stirrer 25 may be bent to contact the bottom surface of the toner loading part 22 when the stirrer 25 rotates to take the bottom toner 24 in the rotational direction. Toner supply apparatus in a developer, characterized in that installed so as to.