KR20090001127U - Developing apparatus for an image forming apparatus having a toner or developer leakage preventing structure - Google Patents

Abstract

The present invention relates to a developing device for an image forming apparatus having a toner or developer leakage preventing structure.

The constitution of the present invention is a developing device for an image forming apparatus, comprising a developing cartridge comprising an opening for receiving a toner or a developer, and a shutter movably provided to open and close the opening. When the toner or the developer tries to leak through the opening, the magnetic member is further included so as not to leak by the magnetic force.

The present invention having such a configuration further includes a magnetic member on the periphery of the opening, which is a toner or developer entrance of the developing cartridge, so that even when the toner or the developer is about to leak, the magnetic member tries to be attached by magnetic force, thereby preventing leakage to the outside. There is an effect that can be.

Image forming apparatus, developing cartridge, toner, leakage, prevention, magnetic, developer

Description

Developing Unit for Image Formation Apparatus with Structure for Preventing Leakage of Toner or Developer}

The present invention relates to a developing device for an image forming apparatus having a leakproof structure of a toner or a developer in an image forming apparatus such as a copying machine or a print. More particularly, the magnetic member is used to prevent leakage of a magnetic toner or a developer. To prevent it.

In general, an image forming apparatus such as a copier, a multifunction printer, or a print includes a photosensitive drum which receives an image signal by an exposure unit to form an electrostatic latent image, a developer for developing the electrostatic latent image of the photosensitive drum with a developer, and a developed photosensitive drum. And a transfer unit for transferring the image of the image onto the recording paper.

A general copier (or multifunction machine) has a developing device therein. The developing device stores a toner in a one-component method, and stores a toner and a developer (carrier) in a two-component method. When the toner or the developer is used up, the developer itself is replaced, and after developing the developer roller and the toner cartridge which stores the toner or the developer, the toner or the developer is used up, Only the toner cartridge can be divided by replacement.

In more detail with reference to FIG. 1, the conventional general copier (or multifunction machine) 1 is divided into the toner cartridge 10 and the developing cartridge 20 inside.

 The toner cartridge 10 stores the toner or the developer therein and serves to supply the toner or the developer to the developing cartridge 20 when the copier operates. In other words, the supply of the toner is supplied while the toner falls from the toner cartridge 10 to the developing cartridge 20 through a conveying device such as an auger.

Of course, the developing cartridge 20 may also be separated from the inside of the copier 1, for example, when the copier 1 or the developing cartridge 20 is broken and repaired, or the copier 1 moves. This is the case of replacing the new developing cartridge 20 with the completion of the use time or service life.

At this time, the developing cartridge 20 is provided with a movable shutter 22 on one side of the main body portion 21, as shown in Figure 2, as shown in Figure 3, the lower portion of the shutter 22 The opening 23 for receiving the toner from the toner cartridge 10 is formed.

In addition, the opening 23 is provided such that the shutter 22 can open and close the opening 23 by a spring 24.

Here, the conventional developing cartridge 20, as shown in Figure 4, the polyethylene (polyethylene) on the circumferential surface of the opening 23 so that the toner contained in the developing cartridge 20 does not leak to the outside during movement A second seal member 26 made of a filmed first seal member 25 and a urethane foam material (sponge) is formed to be in close contact with the shutter 22.

The first and second seal members 25 and 26 are formed with openings 25a and 26a for communicating with the openings 23, respectively, so that the openings 23 are opened by the movement of the shutter 22.

However, when the conventional developing cartridge 20 is mounted inside the main body of the copier 1, the shutter 22 is moved to open the opening 23, and the developing cartridge 20 is removed from the main body of the copier 1 for repair or the like. In the case of removing, the shutter 22 moves to its original position by the repulsive force of the spring 24 to close the opening 23. Therefore, when the 1st sealing member 25 or the 2nd sealing member 26 which adheres to the shutter 22 surface deteriorates and deform | transforms during the use of the copier 1, adhesiveness with the shutter 22 surface falls. As a result, there is a problem in that the toner provided in the developing cartridge 20 is more likely to leak.

Accordingly, the present invention is designed to solve the above-mentioned general problems, and image formation having a toner or developer leakage preventing structure to prevent leakage of toner when supplying toner into the developer using a magnetic member. It is to provide a developer for the device.

In order to achieve the above object, as a solution of the present invention, a developing device for an image forming apparatus, comprising a developing cartridge including an opening for receiving a toner or a developer, and a shutter movably provided to open and close the opening. To

The circumferential surface of the opening is characterized in that the magnetic member further includes a magnetic member to prevent the toner or the developer from leaking through the opening when it is about to leak.

First and second seal members having an opening communicating with the opening are provided on an upper circumferential surface of the opening, and the magnetic member having an opening communicating with the opening is provided between the first and second seal members. .

The opening size of the magnetic member is the same or larger than the opening size of the first seal member.

Magnetic flux density of the magnetic member is preferably in the range between 50mT to 500mT.

The present invention further includes a magnetic member on the periphery of the opening of the developing cartridge, so that even if the toner or the developer is about to leak, the magnetic member is attached by the magnetic force of the developing cartridge, thereby preventing leakage to the outside of the developing cartridge.

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

The same components as in the prior art will be described with the same reference numerals, and detailed description thereof will be omitted, and new components will be described in detail with the new reference numerals.

The present invention, as shown in Figure 5, in the conventional developing cartridge 20 to receive the toner or the developer, the opening 23 is formed on one side of the developing cartridge 20 to allow the toner or the developer to flow Is a structure including the magnetic member 30 on the circumferential surface.

Of course, the circumferential surface of the opening 23 is basically composed of a first seal member 25 having a film form of polyethylene and a second seal member 26 made of urethane foam material (sponge) as in the prior art.

The magnetic member 30 may be provided between the first seal member 25 and the second seal member 26.

The magnetic member 30 is formed with an opening 30a which communicates with the opening 23, which is an opening 25a of the first and second seal members 25 and 26. 26a).

In addition, the size of the opening 30a of the magnetic member 30 is formed larger than the size of the opening 25a of the first seal member 25 disposed above or at least the same.

In other words, as shown in FIG. 5 or FIG. 6, the length b (b ') of one side of the opening 30a of the magnetic member 30 is the first seal member 25 disposed thereon. It is formed longer than the length (a) (a ') of one side of the opening part 25a. Therefore, the portion corresponding to the difference between the lengths (a) and (b) serves as a jamming block for preventing toner leakage.

In addition, the magnetic flux density of the magnetic member 30 is preferably in the range of 50mT to 500mT. By doing this, too little or too much toner to be leaked is not attached.

In addition, as the attachment means of the magnetic member 30, it can be attached using a variety of such as double-sided tape or other bondable adhesive.

The present invention, for example, when the use life of the developing cartridge 20 is to be replaced, or when the copier is moved or repaired by a breakdown, etc. are separated from the copier main body, the shutter 22 is extended The openings 23 are closed by moving by the repulsive force of the springs 24, which have been moved to the opening 23 positions.

In this state, since the developing cartridge 20 is shaken in the process of moving, the toner or the developer contained in the developing cartridge 20 is leaked to the outside through the opening 23, and the peripheral surface of the opening 23 Since the magnetic member 30 is provided in the magnetic member 30, the toner or developer component to be leaked to the outside of the developing cartridge 20 is magnetically held by the magnetic member 30 to prevent leakage to the outside.

In other words, the toner or the developer component is basically magnetic, so that the attraction force is applied by the magnetic member 30 so that the toner or developer component is not detached, and thus the sealing property of the opening 23 can be improved.

Moreover, when the toner or the developer provided in the developing cartridge 20 tries to leak out due to an external impact or the like, first, the toner or the developer passes through the opening 23 and passes through the opening 26a of the second sealing member 26. In the course of passing through the magnetic member 30, the first opening does not leave the upper portion by the magnetic force, but when a part of the toner to be leaked passes through the magnetic member 30, the opening 30a of the magnetic member 30. ) Is larger than the opening 25a of the first seal member 25 disposed thereon, so that the opening 25a having a relatively narrow size of the first seal member 25 serves as a locking function. To prevent external leakage of toner.

Although the present invention has been described with respect to an embodiment of the present invention, the present invention is not limited thereto. For example, an opening is also formed in the toner cartridge, and further includes a magnetic member in addition to the first and second seal members. It can be configured to prevent the leakage of toner or developer.

1 is a perspective view showing an arrangement state of a toner cartridge and a developing cartridge of a general copier.

2 is a perspective view showing a conventional developing cartridge.

3 is an enlarged view of a portion A of FIG. 2.

4 is a cross-sectional view illustrating a structure of a shutter and an opening of a conventional developing cartridge.

5 is a cross-sectional view showing the structure of the shutter and the opening according to the present invention based on FIG.

6 is a view for comparing the size of the first seal member and the magnetic member of the present invention.

* Explanation of Signs of Major Parts of Drawings *

10: toner cartridge

20: developing cartridge

21: main body

22: shutter

23: opening

24: spring

25: first seal member

26: second seal member

30: magnetic member

25a, 26a, 30a: opening

Claims (4)

A developing cartridge (20) comprising a developing cartridge (20) comprising an opening (23) for receiving toner or a developer and a shutter (22) movable to open and close the opening (23), A toner or developer leak is further included in a circumferential surface of the opening 23 so that the magnetic member 30 is prevented from leaking by magnetic force when the toner or developer is about to leak through the opening 23. A developing device for an image forming apparatus having a prevention structure. The method according to claim 1, First and second sealing members 25 and 26 having openings 25a and 26a communicating with the opening 23 are provided on the upper circumferential surface of the opening 23. The magnetic member 30 having an opening 30a communicating with the openings 23, 25a and 26a is provided between the 25 and 26 toner or developer leakage preventing structures. And a developing device for an image forming apparatus. The method according to claim 1 or 2, The size of the opening 30a of the magnetic member 30 is the same or larger than the size of the opening 25a of the first seal member 25. Developing machine. The method according to claim 1 or 2, The magnetic flux density of the magnetic member (30) is a developer for an image forming apparatus having a toner or developer leakage preventing structure, characterized in that the range of 50mT to 500mT.

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