JPS62283363A - Developing device - Google Patents

Abstract

PURPOSE:To prevent contamination of an operator and others due to scattering of developer by attaching a flexible member that blocks a gap between the lower part of an opening and lower part of a shutter when a developing device is removed from the body and opening of a developer container is closed by the shutter to the shutter. CONSTITUTION:When a developing device 2 is detached from the main body and opening of a developer container 21 is closed by a shutter, a gap between the lower side of the shutter and lower part of opening 35 of the container 21 is blocked. That is, a flexible plate 37 lower side of which comes into contact with the lower part 35 of the opening when the shutter 36 is closed is attached to the lower part of the shutter 36. A Mylar film of about 50 is suitable for the flexible plate 37. The lower part 35 of the opening is a bias plate to which AC bias is impressed and collects developer scattered in the lower part of developing area of the drum 1 and prevents scattering to the lower part of the developing device. As the lower side of the flexible plate 37 comes into contact with the lower part 35 of the opening of the developer container 21 and blocks the gap between the two 36, 35, developer does not leak and soil an operator.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention A1 Object of the Invention [Field of Industrial Application] The present invention relates to a phenomenon device for developing a PM image formed by electrophotography or electrostatic recording. .

[Conventional technology]

In recent years, image forming apparatuses that can obtain monochrome copies by replacing multiple developing units have come into widespread use, and the opportunities for users to directly handle the developing units have increased, so it is necessary to prevent users from becoming contaminated with developer when handling them. There is a need to.

Therefore, the present applicant has provided a sleeve shutter in the sleeve developing device, and when the developing device is installed in the main body of the copying device 21 or the process cartridge, the shutter is opened to make the developer conveying sleeve face the N4R carrier, and the developing J.
A developing device has been proposed in which when the A position is removed, the shutter is closed to close the opening of the developer container on the side of the sleeve which is connected to the latent image carrier (see Japanese Patent Laid-Open No. 59-2061, etc.).

[Problem that the invention seeks to solve]

In the conventional device described above, the purpose of opening and closing the opening facing the latent image carrier of the developer 2g device using the shutter is achieved to some extent;
When the developing device is not installed, there is a possibility that a gap is created between the lower part of the shutter and the lower part of the opening of the developer container, and the developer may fly off and contaminate the operator.

(The purpose of the invention is to eliminate this problem. Means for solving problem C of the invention) Kino'e1.!11 uses a rotating sleeve as a developer carrying conveyance member. Remove the developing device from the copier or bromo,
The developer container for attaching the cartridge to the surface of the latent image 1) and the shutter to close it. When you close the opening [ ] of the developer container (remove the developing device from the body and remove it from the body), the opening [ ] of the developer container is closed. I close the gap between
I) Phenomenon j1 Kubu Shimami characterized by the rod member being shattered, ri tko defeat i, and 1 digit.

[1't] Remove the developing agent from the main body and remove the developing agent opening from the main body.
The opening 'V'part!・'Ya...1 gap with the top part,
The second floor is set up on the second floor.The l round material is 2)x, so the developer or the developing device is 11★ late i-loko or V no 1F.
Sat.

〔Example〕

The figure shows an example of the undeveloped device 1-1, and FIG. 1 is a cross-sectional view of the developing device installed in the main body (7).

In the figure, 1 is a rotating drum J as an image 11 carrier, a strong light body in Shigeko photography, 4 an insulator in electrostatic recording, a magnetic body in magnetic recording, etc. Rotationally driven in the direction shown. Hereinafter, this will be abbreviated as a drum. Latent image forming process equipment is arranged around the drum 10, but it is omitted in the figure. Ta.

2 shows the entire developing neck, 21 is a developer container, 2
2 is a developing sleeve made of a non-magnetic material such as aluminum and is a holding and conveying member for a developing agent; 23 is a multipolar magnet 2 fixed to the inner space of the sleeve 22; and 24 is a member on the sleeve 22; A regulating blade that controls the amount of developer conveyed to the developing section; 34 is an AC/DC/Haas ltj source that is applied to the sleeve 2; T is a one-component magnetic toner or magnetic particles;・It is a two-component developer containing mixed toner particles.

The magnet 60-ra 23 cooperates with the plate 24 to attach the sleeve 22.
Along the developer application to L, the controlling N magnetic pole 23a, the developing magnetic pole facing the latent image holding tram 1 and r1, and the SS magnetic J4i 23
b. N for transporting the developer after passing through the developing section into the container 21;
What should we do with the magnetic pole 23c and the S magnetic pole 23J? The S and N poles may be opposite depending on the polarity of the latent image.

This 1-way? ) is a permanent magnet in Example 1, but
Instead of this, a dazzling magnet may be used.

sleeve? 2 in the direction of the arrow, the magnetic particles rise from one side of the container 21 along the surface of the sleeve 22. The n layer 1'Z on the surface of the sleeve is regulated by the action of , and is conveyed to the developing section facing the photosensitive drum 1, where the Wt image on the drum surface is developed by jumping. 26 is a developer pushing back member.

Continuous rotation of the sleeve 220 times saves S consumption for development.
The remaining developer is collected into the container 21 by the action of the magnetic poles 23c and 23d.

Part 111 of Part H is the sleeve phenomenon tongue and 1. Since this is already known, the details thereof will be omitted.

36 is a sleeve (hereinafter abbreviated as 2/YA/YU), and the developing device 2 is removed from the main body 1. As shown in FIG. 2, the opening of the developer container 21 is closed by closing the opening of the developer container 21 by closing the side of the sleeve 22 facing the wrinkled tram 1 to prevent the developer from scattering, and to prevent the developer from flowing into the handling groove. It also prevents T from being dyed.

When the developing device surface is mounted 71 on the K body 4, the shutter 36 is moved to the L direction from the developer container 21, and the sleeve is moved to the photosensitive I/ram. Open facing 1.

The opening/closing mechanism of the shutter 36 is omitted because the one disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 59-2081 etc. is applied.
When the developing device 2 is removed from the main body 4 in FIG. .

When the developing device 2 in this state is attached to the main body 4, the corresponding member provided on the shutter 36 is guided by members such as a guide cam provided on the main body 4, and the shutter 36 is maintained at the first position. , the container 21 moves and opens the sleeve 22 to face the photosensitive tram 1.

Then, the developing device 2 is moved until the distance forming width between the developing device 2 and the photosensitive drum l provided on the sleeve sleeve 23e comes into contact with the drum 1.
When the developing device 2 is moved to the drum 1 side, the shutter 3
6 is held in the state shown in FIG. 1 by a corresponding engagement member with the main body 4.

In the present invention, in the above structure, when the developing device 2 is removed from the main body 4, the shutter 36 is opened to the developer container 2 as shown in FIG.
The purpose is to close the gap between the lower side of the shutter 36 and the opening lower part 35 of the container 21 when the opening of the container 21 is closed.

That is, as shown in FIG. 2, a flexible plate 37 is attached to the lower part of the shutter 36, the lower side of which comes into contact with the lower opening 35 when the shutter 36 is closed. The flexible plate 37 is made of approximately 50mm Mylar film.

In the case shown in the figure, the lower opening 35 is a bias plate that collects the developer scattered at the lower part of the developing area of the tram 1 when AC bias is applied, and prevents it from scattering to the lower part of the developing unit. 2
Reference numeral 9 indicates a receiver for developer leaking from the container 21.

With the above configuration, when the developing device 2 shown in FIG. 2 is removed from the main body 4 and the shutter 36 is closed.

Since the lower side of the flexible plate 37 contacts the opening lower part 35 of the developer container 21 and closes the gap between the two 36 and 35, the developer does not leak out and stain the operator.

In addition, when the shutter 36 is closed when the developing device is attached to the main body, the flexible plate 37 is
Sweep up and clean the developer caught and adhered to container 2.
1.

In addition, the 5T jAAs2O upper part 37a is closed to the shutter 36.
When the shaft 36 is opened, it is brought into contact with the developer layer thickness regulating plate 24 on the sleeve surface as shown in FIG. 1, closing the gap between the sleeves 36 and 24. , it is also possible to prevent the developer from scattering northward.

&2 on top of the developer container 21 to prevent the above-mentioned upward scattering.
Between 1 a and the upper part of the shutter, the upper shutter protrusion 36a
Flexible seals 42 and 43 may be provided between the receiving side 41 of the main body 4 that receives the seals to prevent contamination inside the machine, particularly contamination of the optical system, that is, deterioration of image quality.

C. Effects of the Invention In the sleeve developing device of the above-mentioned removable and replaceable type with an opening/closing mechanism, when the developing device is removed and the shutter covers the sleeve and closes the opening of the developer container, the shutter and the opening Since the gap with the lower part is closed by the flexible material, the developer will not scatter and contaminate the operator and others.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a cross-sectional view when the developing device is installed, and FIG. 2 is a cross-sectional view when the developing device is not installed. DESCRIPTION OF SYMBOLS 1...PVI image carrier (photosensitive drum), 2...Developer, 21...Developer container, 22...Developer carrying and conveying member (sleeve), 23...Magnetic roller, T ...
Developer, 35... Lower opening (bias plate), 36...
-Shutter, 37...Flexible plate.

Claims (1)

[Claims] (1) A developing device using a rotating sleeve as a developer carrying conveyor is attached to and detached from a copying machine main body or a process cartridge, and an opening of a developer container is used to make the sleeve face the latent image carrier. In a developing device having a shutter that opens and closes, a flexible member is attached to the shutter to close a gap between a lower part of the opening and a lower part of the shutter when the developing device is removed from the main body and the shutter closes the opening of the developer container. A developing device characterized by: