KR200153772Y1 - Control device for capacity of toner of development - Google Patents

Abstract

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

It relates to a toner amount control device of a developer.

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

The present invention provides a toner amount regulating device of a developing machine which improves image quality by preventing toner solidification by transferring a predetermined amount of toner to a developing roller and a supply roller.

All. The gist of the solution of the invention.

In the developing device of the electrophotographic processor, in order to constantly regulate the amount of toner supplied to the supply roller 50 during the process of supplying the toner in the toner chamber 80 to the supply roller 50 and the developing roller 40. A slit 81 provided in the toner chamber 80 for transferring the toner by the stirrer 90; A cover (1) having a hinge shaft (4) for opening and closing the slit (81) by restricting rotational movement about the hinge shaft (4) as the amount of toner being conveyed is large and small; And a plate 2 extending in the opposite direction of the cover 1 about the hinge shaft 4 so that the toner being transported is loaded and rotating the cover 1 according to the weight of the loaded toner. do.

la. Important uses of the devise

Developer of the electrophotographic processor.

Description

DEVICE FOR CONTROLLING TONER FEEDING QUANTITY IN DEVELOPING UNIT

The present invention relates to a developing unit of an electrophotographic processor, and more particularly, to a developing roller for delivering toner to a photosensitive drum and a toner amount regulating device for a developing device which always supplies a predetermined amount of toner to a supply roller.

1 is a schematic configuration diagram of a developer in an electrophotographic processor according to an exemplary embodiment. Referring to the drawings, the developing device 100, which is a general disposable consumable, is composed of a photosensitive drum 10, a charging roller 20, a developing roller 40, a transfer roller 30, and the like.

While the charging roller 20 rotates with the photosensitive drum 10, the surface of the photosensitive drum 10 is evenly charged at high pressure, and any digital coming from a controller of a computer or the like is applied to the charged portion of the photosensitive drum 10. An electrostatic latent image is formed by an exposure apparatus 60 that converts a signal into light, and the latent image generated on the photosensitive drum 10 is developed as a toner while passing through a thin and uniform toner layer on the developing roller 40. It turns into In addition, the transfer roller 30 is transferred onto the paper and fused onto the paper by a fixing unit (heating roller and compression roller), not shown, and then discharged.

At this time, in order to form a thin and uniform toner layer on the developing roller 40, a thin and uniform layer of the toner deposited on the supply roller 50 and the developing roller 40 which frictionally charge the toner while buried the toner in the developing roller The blade 70 which is regulated by this is in contact with the developing roller.

Then, in the toner chamber 80 storing the toner, a stirrer 90 for transferring the toner to the developing roller 40 and the supply roller 50 is embedded, which is generally a drive gear (not shown in the drawing). ) To rotate. Therefore, the set conveys the toner while rotating the stirrer 90 for supplying the toner for the printing process.

However, regardless of the amount of toner that the stirrer feeds on the paper, if the set is driven, it not only supplies the toner on the feed roller and the developing roller while driving, but also rotates the stirrer even if the space on the feed roller and the developing roller is filled with toner. By supplying the toner, there is a problem that the toner, which is in a powder state, becomes more compacted on the supply roller and the developing roller, and thus becomes easily solidified.

Moreover, liquidity is lost, making it difficult to transfer toner to the developing roller and the feeding roller. Therefore, there is a problem that the frictional charge amount of the toner is lowered and the image quality of the printed sheet is lowered.

The present invention is devised to solve the above-described problems, and an object of the present invention is to prevent the toner from being transferred to the supply roller and the developing roller even when the stirrer is driven when a certain amount of toner is transferred to the supply roller and the developing roller. Toner amount control device of developer that prevents toner solidification by allowing toner to be transported again when a certain amount of toner on developing roller and feed roller is consumed. Is in.

In order to achieve the above object, the present invention in the developing device of the electrophotographic processor,

In the process of supplying the toner in the toner chamber 80 to the supply roller 50 and the developing roller 40, in order to constantly regulate the amount of toner supplied to the supply roller 50.

A slit 81 provided in the toner chamber 80 for transferring the toner by the stirrer 90;

A cover (1) having a hinge shaft (4) for opening and closing the slit (81) by restricting rotational movement about the hinge shaft (4) as the amount of toner being conveyed is large and small; And

It extends in the opposite direction of the cover (1) around the hinge shaft (4) is loaded with the toner being transported, it consists of a plate (2) for rotating the cover (1) in accordance with the weight of the loaded toner .

1 is a schematic block diagram showing a process of transferring toner in a developing device in an electrophotographic processor according to a conventional embodiment;

Figure 2 is a side view showing the configuration of the toner amount regulating device when the toner amount is large according to one embodiment of the present invention.

Figure 3 is a side view showing the configuration of the toner amount regulating device when the toner amount is small according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: cover 2: plate

3: weight 10: photosensitive drum

40: developing roller 50: feeding roller

100: developer

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.

2 and 3, the toner amount regulating device of the developing apparatus according to an embodiment of the present invention is provided in the toner chamber 80, the slit 81 and the hinge shaft (4) for transferring the toner A cover 1 for rotating the slit 81 to open and close the slit 81 and a plate 2 for providing a rotational force to the cover 1 according to the weight of the toner amount loaded in the opposite direction of the cover 1. It is roughly divided into).

The slit 81 means a hole for transferring the toner loaded in the toner chamber 80 to the feed roller 50. That is, the slit 81 refers to a hole through which the toner stirred while having a predetermined amount of charge by the stirrer 90 passes. At this time, the slit 81 extends in the developer longitudinal direction.

The cover 1 serves to open the slit 81 and extends in the developer direction. The cover 1 has a limited rotational movement about the hinge shaft 4 and is integrally connected to the hinge shaft 4 by a link 1a. In this case, the cover 1 is installed outside or below the slit 81. In addition, the rotation angle of the cover 1 is rotated only enough to open and close the slit 81 about the hinge axis (4).

The plate (2) is a component extending integrally with the cover (1) in the opposite direction of the cover, located on the feed roller 50 side is installed to move together with the cover (1), toner is efficiently It is curved to be stacked.

That is, when the cover 1 opens the slit 81, the plate 2 is curved inward to facilitate toner loading. The plate 2 also extends in the developer longitudinal direction.

Additionally, when the cover 1 and the plate 2 rotate about the hinge shaft 4, the link 1a or the hinge shaft in order to balance the weight as the amount of toner transferred is large and small. An additional weight (3: weight) is integrally attached to (4).

According to the above configuration, as shown in Fig. 3, the apparatus set is operated for printing, and while the toner is stirred by rotating the stirrer 90 installed in the toner chamber 80, the plate 2 If the self weight of the toner amount loaded in the body is smaller than the weight of the weight 3, the cover 1 is rotated so that the slit 81 is opened in the toner chamber 80, and the plate for loading the toner ( 2) is a state in which the cover 1 is rotated by the rotation.

During printing, the agitator 90 in the toner chamber 80 rotates to transfer the toner between the slits 81, which gradually accumulate on the plate 2. Then, as the toner gradually builds up, the plate 2 gradually goes down due to the self weight of the toner. As shown in Fig. 2, when a certain amount of toner accumulates on the plate 2, the cover 1 on the opposite side of the hinge shaft 4 blocks the slit 81. Transfer of the toner through the slit 81 is stopped.

Then, the toner is not transported through the slit 81 and is stirred only in the toner chamber 80. After a certain period of time, if a certain amount of toner is developed and consumed by the developing roller 40 by the photosensitive drum 10, the amount of toner on the plate 2 is reduced so that the plate 2 gradually rises up. do. At this time, the cover 1 located on the opposite side is lowered again to maintain the same state as the initial state of FIG. 3.

As a result, when the operation of the plate 2 and the cover 1 is repeated according to this operation principle, the amount of toner on the supply roller 50 and the developing roller 40 is always kept constant.

As described above, the present invention can effectively control the amount of toner on the feed roller and the developing roller to a certain amount, and is effective in preventing the toner from filling up and the solidification of the space on the feed roller and the developing roller. 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.

Claims (4)

In the developing device of the electrophotographic processor, In the process of supplying the toner in the toner chamber 80 to the supply roller 50 and the developing roller 40, in order to constantly regulate the amount of toner supplied to the supply roller 50. A slit 81 provided in the toner chamber 80 for transferring the toner by the stirrer 90; A cover (1) having a hinge shaft (4) for opening and closing the slit (81) by restricting rotational movement about the hinge shaft (4) as the amount of toner being conveyed is large and small; And Consists of a plate (2) extending in the opposite direction of the cover (1) around the hinge shaft (4), the toner being transported, and rotates the cover (1) in accordance with the weight of the amount of toner loaded A toner amount regulating device for a developer characterized by a load. The method of claim 1, And the slit (81), cover (1) and plate (2) extend in the developer longitudinal direction. The method of claim 1, And a weight (3) is additionally arranged between the cover (1) and the plate (2). The method of claim 3, The plate (2) is a toner amount regulating device of the developer, characterized in that the bent shape so that the transferred toner is efficiently loaded.