KR200144680Y1 - Developing roller device of equipment using electrophotographic method - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a developing roller device of a device using an electrophotographic method.

2. The technical problem the invention is trying to solve:

The present invention is to provide a developing roller device for maintaining a good image quality and stable operation of the development drive unit by preventing wear at both ends due to friction during rotation.

3. Summary of the solution of the design:

The present invention has a higher hardness than the rubber roll of the developing roller in order to prevent the chipping (abrasion, etc.) due to friction on both sides of the developing roller, that is, in contact with the seal. It is characterized by attaching a ring-shaped wear protection material made of rubber or metals.

4. Important uses of the devise:

The present invention prevents contamination of the developer due to toner spillage by forming both ends of the developing roller, which plays an important role in supplying a thin and even toner layer to the photosensitive drum, to withstand rotational friction for a long time. It produces an effect that can maintain the operation of the stable development drive.

Description

Developing roller device of equipment using electrophotographic method

1 is a schematic diagram of a developing apparatus generally used.

2 is a cross-sectional view showing a state in which a developing roller device is mounted on the developer frame of FIG.

3 is a cross-sectional view showing a state in which a developing roller device according to an embodiment of the present invention is mounted on a developer frame.

4 is a cross-sectional view showing a developing roller device which is a main part of FIG.

* Explanation of symbols for main parts of the drawings

10: developing roller 11: shaft

12: rubber roll 13: mounting surface

14: wear protection material

The present invention relates to a developing roller device of an apparatus using an electrophotographic method, in particular, the surface of the rubber roll due to friction between the seal and the rubber developing roller installed to prevent toner from leaking out at both ends of the rubber developing roller. The present invention relates to a developing roller device for preventing damage.

For the schematic configuration and operation of the developing device 30 in the apparatus using the electrophotographic method, referring to FIG. 1, the photosensitive drum is operated at high pressure while the charging roller 31 is rotated together with the photosensitive drum 32. The surface of the 32 is evenly charged (corona discharge), wherein the charged portion of the photosensitive drum 32 is provided with a scanning unit (not shown) for converting any digital signal from a computer or the like into light. By doing so, an electrostatic latent image is generated. The electrostatic latent image thus produced is developed into a toner by passing through a thin, uniform layer of toner 34 on the developing roller 33 adjacent to the surface of the photosensitive drum 32 to become a visible image. The toner image formed as described above is transferred onto the recording paper 36 by the transfer roller 35. Subsequently, the toner image transferred on the recording paper 36 as described above passes between the heating roller and the pressing roller (both not shown) of the fixing unit, by the heat and pressure. After being fused onto 36, it is discharged to the outside via an exit roller (not shown). In this case, the toner 34 is uniformly applied on the developing roller 33. First, the toner 34 in the hopper 37 of the developing machine is agitated by the rotation of the agitator 38. The stirred toner 34 becomes a polarized toner by an applied voltage and friction formed between the developing roller 33 and the supply roller 39 by the rotation of the supply roller 39, and thus the toner 34 is applied to the developing roller 33. Will stick. At this time, the toner adhering to the developing roller 33 forms a uniform layer of a uniform toner layer by the blade 40.

2 is a cross-sectional view of the developing roller 33 in the developing device 30 having the above-described configuration and operation, wherein the shaft 41 is formed of a conductor so that a high-pressure bias voltage can be applied, and the shaft ( 41 is formed into a rubber roll 42 which is inserted into a 41 to move the toner 34 onto the photosensitive drum 32, and is installed in one frame 43 in the developing device 30. . At this time, both sides of the developing roller 33 are provided with a seal 44 for preventing the toner 34 from leaking out of the developing device 30.

In the conventional developing roller device as described above, both ends of the rubber roll are crushed due to friction with the seal installed to prevent toner leakage by the continuous rotation of the developing roller, and the toner leaks into the slit to contaminate the paper and the developer. In addition, there is a problem that not only enormous damage to the image quality, but also the rubber component cut into the driving portion of the photosensitive drum surface and the gear affects the normal operation of the developer.

Accordingly, an object of the present invention is to provide a developing roller device that does not easily wear both ends due to friction during rotation.

Another object of the present invention is to maintain good image quality and to stabilize operation of the developing drive unit by preventing wear of the developing roller.

In accordance with the above object, the present invention is a rubber roller of the developing roller in order to prevent the chipping (abrasion, etc.) due to friction on both sides of the developing roller, that is, the part in contact with the seal. It is characterized by attaching a ring-shaped wear protection material of higher hardness rubber or metals.

Hereinafter, preferred 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 have the same reference numerals as much as possible even if displayed on different drawings. In addition, in the present invention, the overall configuration and operation mechanism of the developing device is the same as in the prior art, but it is to be noted that there is a difference in the formation of the developing roller device.

Referring to FIG. 1 and the attached FIG. 3 and FIG. 4, the developing roller device of the apparatus using the electrophotographic method according to the present invention is described as follows.

The shaft 11 of the developing roller 10 device according to the present invention is formed of a conductor so that a bias voltage of a high pressure can be applied. The rubber roll 12, which is inserted into the shaft 11 to receive a voltage and moves the toner 34 onto the photosensitive drum 32, has a predetermined width and depth along the circumference thereof on both surfaces thereof. A shaved attachment surface 13 is formed. Both ends of the developing roller 10 are provided with a seal 44 to prevent leakage of the toner 34. In addition, the anti-wear material 14 formed in a ring shape on the attachment surface 13 of the rubber roll 12 to prevent wear by the seal 44 by the rotation of the developing roller 10. ) Is fixed with an adhesive. At this time, the ring 14 is a rubber of greater hardness than the rubber roll 12, or is formed of metals and non-metals, and the wear protection material 14 is sprayed on the attachment surface 13 of the rubber roll 12 Sometimes formed by spray coating

Looking at the action and effect of the developing roller device according to the present invention formed as described above, the developing roller 10 device is mounted on one side frame 43 in the developing device 30 shown in FIG. 1, wherein the developing roller Seals 44 are provided on both sides of the 10 to prevent the toner 34 from leaking out of the developer 30. The developing roller 10 mounted as described above carries the toner 34 stirred from the stirrer 38 in the developing device 30 to the surface of the adjacent photosensitive drum 32 according to the operation of the apparatus. At this time, the seal 44 prevents the toner 34 from leaking out, and the ring 14 of the developing roller 10 prevents wear due to friction with the seal 44 due to rotation. You will.

As described above, the present invention can prevent the contamination of the developer due to the outflow of the toner by forming both ends of the developing roller, which plays an important role of supplying a thin and even toner layer to the photosensitive drum, to withstand rotational friction for a long time. This produces the effect of maintaining good image quality and stable operation of the driving portion.

Claims (11)

In the developing apparatus of an apparatus using an electrophotographic method in which a developing roller 10 for transporting toner and a seal 44 for preventing toner leakage on both sides of the developing roller 10 are provided, the developing roller 10 In order to prevent damage due to friction between the seal 44 and the seal 44, the wear preventing material 14 is attached to a part of the developing roller 10 in contact with the seal 44. Development roller device of the machine. 2. The developing roller (10) according to claim 1, wherein the developing roller (10) consists of a shaft (11) and a rubber roll (12) fixed on the shaft (11), and has a predetermined width and depth around both surfaces of the rubber roll (12). A developing roller device for an apparatus using an electrophotographic method, characterized in that forming an attachment surface (13) for cutting off and fixing the wear protection material (14). 3. The developing roller device according to claim 2, wherein the wear preventing material (14) is rubber, metal or nonmetal having a hardness greater than that of the rubber roll (12) of the developing roller (10). The apparatus of claim 2, wherein the wear preventing material (14) is formed in a ring shape for fixing to the attachment surface (13) of the rubber roll (12). 5. The developing roller apparatus of the apparatus according to claim 4, wherein the wear preventing material (14) is fixed to the attachment surface (13) by using an adhesive. The apparatus of claim 2, wherein the wear preventing material (14) is spray-coated on the attachment surface (13) of the rubber roll (12) to form a ring shape. An apparatus according to claim 1, wherein the wear preventing material (14) rubs against the seal (44) to prevent the outflow of toner. A developing roller device for an apparatus using an electrophotographic method in which a developing roller 10 for conveying toner and a seal 44 for preventing toner leakage are provided on both sides of the developing roller 10, wherein the developing roller 10 In order to prevent the toner from leaking due to the friction caused by the friction between the seal 44 and the seal 44, the attachment surface 13 is cut by a predetermined width and depth around both surfaces of the rubber roll 12 of the developing roller 10. And developing a ring-shaped wear protection material 14 to prevent abrasion due to friction with the seal 44 on the attachment surface 13. Device. 9. The developing roller device according to claim 8, wherein the wear preventing material (14) is rubber, metal, or non-metal having a hardness greater than that of the rubber roll (12) of the developing roller (10). The apparatus of claim 8, wherein the wear preventing material (14) is fixed to the attachment surface (13) by using an adhesive. 9. The developing roller apparatus of an apparatus according to claim 8, wherein the wear preventing material (14) rubs against the seal (4) to prevent leakage of toner.