KR19990029310U - Driving mechanism of the developer - Google Patents

Abstract

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

The present invention relates to a driving mechanism of the developer.

I. The technical problem the invention is trying to solve

The present invention simplifies the structure, thereby reducing the manufacturing cost of the developer and providing a driving mechanism of the developer, which is advantageous for miniaturization.

All. The gist of the solution of the invention.

The present invention is a developing device driving mechanism having a fixed gear arrangement integrally on one side of the developing device, the photosensitive drum gear received power from the drive source is engaged with the power transmission gear, the power transmission gear is a timing belt of hard rubber material It is connected to the developing roller gear so that power is indirectly transmitted from the photosensitive drum to the developing roller.

la. Important uses of the devise.

Developing machine.

Description

Driving mechanism of the developer

The present invention relates to a developing device of an electrophotographic processor including an electrophotographic developing method, a printer, a facsimile and a laser beam printer, and more particularly, to a driving mechanism of the developing device.

In general, an electrophotographic processor using an electrophotographic developing method includes a printer, a laser beam printer, a facsimile machine, and the like. Such an apparatus copies a paper, which is a toner, by developing in a developing device. Such a developing device is a disposable consumable and should be replaced when all the toner in the toner chamber is exhausted.

In the image forming apparatus in which such a developing device is essentially mounted, a plurality of sheets of paper are loaded into a paper cassette, and the top sheet of paper is sequentially directed toward the alignment roller by the pick-up roller, and the leading edge of the paper is aligned by the alignment roller. Head towards the developer. Such a developer is shown in FIG.

The conventional developing device is composed of a plurality of rollers, etc., and consists of a series of processes of known charging, exposure, transfer and fixing. In the charging process, the photosensitive drum 2 is charged by the conductive roller 1, which is a contact charger, thereby forming a uniform charge on the photosensitive drum 2. In the exposure process, an electrostatic latent image is formed on the photosensitive drum 2 by exposing the charged photosensitive drum 2 to the original or image data by the LSU. The developing process then attaches the developer supplied by the supply roller 5 to the electrostatic latent image formed on the photosensitive drum 2 by transferring the developer to the photosensitive drum.

At this time, a blocker 8 is formed on the upper part of the developing roller, and the doctor blade 4 is provided on the blocker 8 to make the thickness of the toner amount of the developing roller constant. Therefore, the toner amount is regulated by the doctor blade 4. In the transfer process, the developer attached to the photosensitive drum 2 is transferred to the recording paper by the transfer roller 9. Finally, the developer is fixed on the paper by the fuser not shown.

As shown in Fig. 2, the developing device which performs printing process on the basis of the above-described series of processes has a mechanism driven by receiving power from one driving source. That is, power is first transmitted from the driving mechanism to the photosensitive drum gear G2 by the gear G, and the photosensitive drum gear G2 is engaged with the developing roller gear G3 to drive the developing roller, and the developing roller gear G3 is a supply roller. It has a gear arrangement which drives with gear G5, and transmits power to the stirrer gear G6 by the power transmission gear G5-1. The driving source for driving the drum and the roller of the developing machine is a power transmission process by constantly engaging the arrangement between the gears. In other words, the driving unit of the developing device is composed of one system.

However, a developing device having such a driving mechanism has a disadvantage in that the configuration is complicated, the assembly production cost is inexpensive, and accordingly, the size of the developing device is disadvantageous. As the driving force of the photosensitive drum is directly transmitted, if the gear of the photosensitive drum is slightly misaligned, such driving force is developed in the power transmission process, which causes more serious problems.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to reduce the manufacturing cost of the developer, and to provide a driving mechanism of the developer for miniaturization.

In order to achieve the above objects, the present invention is a developing device driving mechanism having a fixed gear arrangement integrally on one side of the developing device, the photosensitive drum gear received power from the drive source is engaged with the power transmission gear, the power transmission gear Is connected to the developing roller gear by a timing belt made of a hard rubber material to indirectly transfer power from the photosensitive drum to the developing roller.

1 is a block diagram showing a developing device according to a conventional embodiment

2 is a block diagram showing a gear arrangement of the developing device according to a conventional embodiment

3 is a block diagram showing a gear arrangement of the developing device according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

G2: Photosensitive Drum Gear G2-1: Power Shear Gear

G3: Developing roller gear 30: Timing belt

Hereinafter, with reference to the accompanying drawings will be described in detail the most preferred embodiment of the present invention. First, in describing each of the drawings, only the same components have the same reference numerals as much as possible even if shown 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.

3 is a block diagram showing a gear arrangement of a developing device according to an embodiment of the present invention. Referring to the drawings,

A driving mechanism for driving the developer 50 is integrally installed on one side of the developer with a gear arrangement.

Therefore, when power is transmitted to the photosensitive drum gear G2 as the driving mechanism of the main body including the driving motor, the driving mechanism of the developer takes different gear rotations and arrangements around the photosensitive drum gear G2, thereby providing power between the gears. This is the structure that is passed. With such a gear arrangement, when the photosensitive drum is rotated, the developing roller, the feeding roller, the stirrer, and the like are simultaneously driven while taking a constant rotational direction.

In the developing device driving device of the present invention, power is transmitted from the gear G of the driving source to the photosensitive drum gear G2, the photosensitive drum gear G2 meshes with the power transmission gear G2-1, and the power transmission gear G2-1 is driven by the belt 30. Power is supplied to the developing roller gear G3, the developing roller gear G3 transfers power to the feed roller gear G5, and the supply roller gear G5 transfers the power to the gear G6 of the stirrer by the connecting gear G5-1.

The gear G of the drive source is engaged with the photosensitive drum gear G2, and the photosensitive drum gear G2 is engaged with the power transmission gear G2-1. Subsequently, the power transmission gear G2-1 transmitted by the photosensitive drum gear G2 transmits power to the developing roller gear G3 by a timing belt 30 made of hard rubber material. The developing roller gear G3 is indirectly transmitted using a power transmission means called a timing belt 30, deviating from the conventional method of directly engaging the photosensitive drum gear and transmitting power.

At this time, the timing belt 30 is engaged with the shaft of the power transmission gear G2 and the developing roller gear G3. The timing belt 30 is a hard rubber material and is a means for accurately transmitting power. In addition, the power transmission gear G2-1 is installed on one side of the developing unit by a shaft.

As a result, the developing roller gear G3 indirectly receives power from the photosensitive drum gear G2, which simplifies the structure and reduces the manufacturing cost.

On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

As described above, the present invention, in the developing device of the electrophotographic processor including a printer or a copying machine using an electrophotographic developing method, indirectly transfers power between the photosensitive drum and the developing roller in the driving unit installed on one side of the developing device. By constructing, the structure is simplified, the cost is reduced, and the size of the developing device is also advantageous.

Moreover, the driving force of the photosensitive drum does not directly affect the developing roller, so that the image is stabilized.

Claims (1)

In the developing device driving mechanism having a uniform gear arrangement integrally on one side of the developing device, The photosensitive drum gear, which receives power from the driving source, is engaged with the power transmission gear, and the power transmission gear is connected to the developing roller gear by a timing belt made of hard rubber material so that power is indirectly transmitted to the developing roller in the photosensitive drum. The driving mechanism of the developing device.