JP2003270916A - Developing device for electrophotographic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a developing device for an electrophotographic device preventing toner raised inside the developing device 1 from passing through a developer feeding port and being scattered to the outside of the developing device even at the time of feeding the developer. <P>SOLUTION: In the developing device for the electrophotographic device opposed to a photoreceptor having photoconductivity and developing an electrostatic latent image formed on the photoreceptor by using developer consisting of toner being powder ink and carrier triboelectrified with the toner, a cover opened/closed by the load of the developer flowing in at the time of feeding the developer is provided at the developer feeding port. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device for an electrophotographic apparatus.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. As shown in FIG. 3, the electrostatic latent image formed on a photoconductive member (not shown) having photoconductivity is developed by using a developer 5 composed of a powder ink toner and a carrier frictionally charged with the toner. In the developing device 1 of the electrophotographic apparatus, the developer 5 is less likely to be charged during the printing operation, and printing cannot be performed sufficiently. Therefore, in order to enable replacement with a new developer 5 after performing a certain printing operation, a developer discharge port (not shown) in the developing device 1 and a developing process for introducing the developer 5 into the developing device 1 are performed. Generally, the agent inlet 2 is provided. The developer charging port structure of the conventional developing device is provided with a slope-shaped tray member 3 that facilitates charging of the developer 5 and guides the developer to the developer charging port 2. In order to prevent the toner from scattering from the developer input port during the operation, the removable lid 8 is provided.

[0003]

However, the conventional developer inlet structure of the developing device has the following problems. As shown in FIG. 4, in the conventional developer input port structure of the developing device 1, the developer input port 2 is provided with a lid 8 so that the toner is not scattered from the developer input port during the operation of the developing device. However, since the developer 5 is poured into the tray member 3 from the developer storage container 6 such as a bottle when the developer is charged, the lid 8 must be removed, and the developer charging port 2 is used to charge the developer. Since the toner 5 is wide open so that the developer can easily flow, the toner 7 wound up inside the developing device 1 scatters to the outside of the developing device 1 through the gap a1 between the developer 5 and the developer 5 into which the developing device 1 flows. There was a problem that stains the surrounding area.

An object of the present invention is to prevent the toner wound up inside the developing device from scattering outside when the developer is charged.

[0005]

In order to solve the above-mentioned problems, the present invention is characterized in that the developer input port is provided with a lid which can be opened and closed by the load of the developer flowing when the developer is input. And

Further, the present invention is characterized in that the lid is a sheet-shaped elastic body.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. The developer input port 2 of the developing device 1 is a slope-shaped tray that facilitates the input of the developer into the developer external port of the developer input port 2 and guides the developer to the developer input port 2. A member 3 is provided. A second lid 4 which can be opened and closed by applying a load is provided between the developing device inlet 2 of the developer input port 2 and the tray member 3. The second lid 4 which can be opened and closed uses a sheet-shaped elastic body. Furthermore, the second that can be opened and closed
The lid 4 can be opened and closed by fixing only the upper side of the four sides of the upper, lower, left and right sides to the developing device, and not fixing the other three sides, with the upper part of the lid as a fulcrum. In the normal state, the openable and closable second lid 4 is in a state in which the developer input port 2 is closed. As shown in FIG. 2, when the developer is charged, the developer 5 is poured from the developer storage container 6 such as a bottle to the tray member 3.
The poured developer 5 is guided to the developer input port 2 by the slope of the tray member 3. The lid 4 flows into the developer 5
The developer 5 is loaded into the inside of the developing device 1 through the developer loading port 2 by the load. At this time, since the gap a1 between the developer input port 2 and the developer 5 flowing in is closed by the openable second lid 4, the toner 7 is scattered from the inside of the developing device 1 when the developer is input. Is prevented. Also, when the developer 5 is completely charged and the developer 5 does not flow into the developer charging port and the load is not applied to the lid 4, the lid 4 is closed. It is possible to prevent the toner 7 from scattering from the inside of the developing device 1.

[0008]

As described above, according to the present invention, the developer input port is provided with the lid which can be opened and closed by the load of the developer flowing into the developer input port when the developer is input. To prevent toner from scattering from the inside of the developing container,
It is possible to prevent the area around the developing device from being soiled.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state when a developer is charged in an example of the present invention.

FIG. 3 is a cross-sectional view showing a conventional developing device.

FIG. 4 is a cross-sectional view showing a state when a developer is charged in a conventional developing device.

[Description of Reference Signs] 1 is a developing device, 2 is a developer inlet, 3 is a tray member, 4
Is a second lid, 5 is a developer, 6 is a developer storage container, 7 is toner, 8 is a lid, 9 is a magnetic roll, and a1 is a gap.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koji Doi             Hitachiko, 1060 Takeda, Hitachinaka City, Ibaraki Prefecture             Machine Co., Ltd. F term (reference) 2H077 AA12 AA18 AA34 AA39 AE06                       BA08 EA01 FA22

Claims (3)

[Claims] 1. An electrostatic latent image formed on the photoconductor using a developer composed of a toner, which is a powder ink, and a carrier, which is frictionally charged with the toner, facing a photoconductor having photoconductivity. In a developing device of an electrophotographic apparatus for developing, a developer inlet is provided with a lid that can be opened and closed by a load of the developer flowing when the developer is introduced.
Developing device for electrophotographic device. 2. The developing device for an electrophotographic apparatus according to claim 1, wherein the lid is a sheet-shaped elastic body. 3. The developing device for an electrophotographic apparatus according to claim 2, wherein the lid is fixed only on the upper side of the four sides of the upper, lower, left and right sides and can be opened and closed with the upper portion of the lid as a fulcrum. .