JP3283664B2 - Electrophotographic recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic recording apparatus such as a copying machine, a facsimile, and a printer.

[0002]

2. Description of the Related Art FIG. 8 shows the configuration of a general electrophotographic recording apparatus.

In this electrophotographic recording apparatus having a well-known configuration, the residual toner on the photoreceptor 1 is removed by a cleaning blade of a cleaning unit 2 and a discharging lamp 3
To lower the surface potential of the photoconductor 1. Then, the photoconductor 1 is uniformly charged by a charging charger (charging roller) 4, and an electrostatic latent image is formed on the photoconductor 1 by exposure from the optical writing device 5. This latent image is visualized by the toner when passing through the developing device 6.

On the other hand, the main paper feeding section 7 or the auxiliary paper feeding section 10
The image is transferred by the transfer charger 8 to the recording paper fed from the printer, and the transferred visible image on the recording paper is fixed to the fixing device 9.
And is discharged. In the figure, 11 is a main body cassette, 12 is a simple cassette, 13 is a toner cartridge, and 17 is a dustproof glass provided on the front surface of the optical writing device 5 on the light emission side.

[0005]

In the above-mentioned electrophotographic recording apparatus, the dustproof glass 17 has conventionally been cleaned by a service person on a regular basis.

Recently, there has been proposed an electrophotographic recording apparatus in which a magazine in which a cleaning unit 2, a toner cartridge 13, and a charging charger 4 are integrated can be detachably mounted on an apparatus main body. In some cases, the reliability was low or the photoreceptor was damaged by the charged charger.

[0007] The present invention is based on the premise that the magazine is adopted, and an object of the present invention is to provide an electrophotographic recording apparatus which can increase the reliability of attaching and detaching a magazine.

[0008]

In order to achieve the above object, the present invention provides an electrophotographic recording apparatus for performing each of processes of charging, optical writing, development, transfer, separation, and cleaning on a photosensitive member. A cleaning unit,
A toner cartridge and a magazine provided with charging means are provided detachably with respect to the apparatus main body, and a locking means for positioning and engaging the magazine at a predetermined position, and a pressure of the charging means with respect to the photoreceptor are provided. Pressure releasing means for releasing, the locking means and the pressure releasing means are integrally formed in a charged voltage releasing and locking arm, and the charged voltage releasing and unlocking function is interlocked with opening and closing of the magazine replacement cover. A lock arm is operated to release the pressure by the pressure releasing means and release the lock by the locking means when the replacement cover is opened.

[0009]

According to the electrophotographic recording apparatus having the above-described structure, the magazine can be accurately positioned at a predetermined position by the lock means when the magazine is exchanged (detachable), and the pressure release of the charging means by the pressure release means. By doing so, the charging means does not damage the photoconductor at the time of magazine replacement, and further, by releasing the pressure of the charging means and locking the magazine in conjunction with opening and closing of the magazine replacement cover, the operation of the magazine can be performed with one touch operation. Positioning and locking are performed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The members corresponding to the members described with reference to FIG.

FIG. 1 is a schematic configuration diagram of a first reference example of an electrophotographic recording apparatus for explaining an embodiment of the present invention.

The cleaning unit 2 and the charging roller 4
And the magazine 14 with the toner cartridge 13 integrated,
It is guided by the guide portion 14a and is connected to the photoreceptor 1. Further, on the dustproof glass 17 side of the magazine 14, a cleaning means 16 formed of sponge, felt or the like is provided.

When the magazine 14 is replaced, the magazine replacement cover 15 is opened and the magazine 14 is pulled out upward, so that the cleaning means 16 comes in contact with the dust-proof glass 17 of the optical writing device 5, and The dirt on the glass 17 can be removed by the cleaning means 16.

FIG. 2 is a configuration diagram of a magazine section according to a second reference example.
FIG. 3 is a configuration diagram of the magazine portion in FIG. 2 in an unlocked state.

The magazine 14 is provided with a lock portion 18b of the first lock arm 18 which engages with the support shaft 1a of the photoreceptor 1 for positioning.
It is locked and locked (Fig. 2). Here, by pressing the pressing portion 18a of the first lock arm 18, the first lock arm 18 rotates counterclockwise, the lock is released, and the magazine 14 can be replaced (FIG. 3). .

FIG. 4 is a diagram showing the configuration of a magazine section according to a third embodiment. In this third embodiment, when the magazine 14 is replaced, the charging roller 19 is pressed by pressing the pressing section 19a of the charging voltage release arm 19. When the charging roller 4 is pressed into the magazine 14 by the contact portion 19b with the roller 4, the roller pressure is released, and the magazine 14 can be replaced without the charging roller 4 rubbing against the photoconductor 1.

FIG. 5 is a diagram showing the configuration of a magazine section according to a fourth embodiment. In this fourth embodiment, the magazine 14 includes a lock portion 20b of the second lock arm 20 and a support shaft 1a of the photosensitive member 1. The lock state is established by matching. Here, when the magazine replacement cover 15 is opened, the hanging piece 15a that has pressed the pressing portion 20a of the second lock arm 20 moves, so that the second lock arm 20 receives the tensile force of the spring 21. And the lock portion 20b is disengaged from the support shaft 1a, and the magazine 14 can be replaced.

FIG. 6 is a diagram showing the configuration of the fifth embodiment when the magazine is unlocked. In this fifth embodiment, the magazine 14 is provided with the lock portion 22c of the first charged voltage release and lock arm 22 that is exposed to light. Engagement with the support shaft 1a of the body 1 results in a locked state. In this state, when the pressing portion 22a is pressed, the first charged voltage release and lock arm 22 rotates counterclockwise as shown in the figure, and the charging roller contact portion 22b presses the charging roller 4, and
Since the pressure of the charging roller 4 on the photoconductor 1 is released and the lock of the magazine 14 can be released at the same time, the magazine 14 can be replaced.

FIG. 7 is a diagram showing the configuration of a magazine section according to an embodiment of the present invention. In this embodiment, the magazine 14 has a lock portion 23c of the second charged voltage releasing and lock arm 23 supporting the photosensitive member 1. It is locked with the shaft 1a. Here, when the magazine replacement cover 15 is opened, the hanging piece 15b that has pressed the pressing portion 23a moves, so that the second charged voltage release and lock arm 23 rotates by receiving the pulling force of the spring 24. Then, the charging roller contact portion 23b presses the charging roller 4 to release the pressure of the charging roller 4 on the photoconductor 1, and the lock portion 23c is disengaged from the support shaft 1a, so that the magazine 14 can be replaced.

[0020]

As described above, according to the electrophotographic recording apparatus of the present invention, the position of the magazine can be accurately determined by the locking means for positioning, and the charge is released when the magazine is replaced by the pressure release by the charging means by the pressure release means. Means does not damage the photoreceptor, and furthermore, the locking means and the pressure releasing means are integrally formed with the charged voltage releasing and lock arm, and in conjunction with opening and closing of the magazine replacement cover,
Since the pressure of the charging unit is released and the lock of the magazine is released, the position of the magazine is locked and the charged voltage is applied to the photosensitive member by one-touch operation, thereby preventing the deterioration of image quality. .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a first reference example of an electrophotographic recording apparatus for explaining an embodiment of the present invention.

FIG. 2 is a configuration diagram of a magazine unit of a second reference example of the electrophotographic recording apparatus.

FIG. 3 is a configuration diagram of an unlocked state of a second reference example.

FIG. 4 is a configuration diagram of a magazine unit of a third reference example of the electrophotographic recording apparatus.

FIG. 5 is a configuration diagram of a magazine section of a fourth reference example of the electrophotographic recording apparatus.

FIG. 6 is a configuration diagram of a magazine section of a fifth reference example of the electrophotographic recording apparatus.

FIG. 7 is a configuration diagram of a magazine section of an embodiment of the electrophotographic recording apparatus of the present invention.

FIG. 8 is a configuration diagram of a general electrophotographic recording apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Photoreceptor, 2 ... Cleaning unit, 4 ... Charging roller (charging means), 5 ... Optical writing device, 13 ... Toner cartridge, 14 ... Magazine, 15 ... Magazine replacement cover, 16 ... Cleaning means, 17 ... Dustproof Glass, 18, 20…
Lock arm, 19: Charged voltage release arm, 22, 23 ... Charged voltage release and lock arm.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03G 15/00 550 G03G 21/16-21/18 G03G 15/02 101

Claims (1)

(57) [Claims] 1. An electrophotographic recording apparatus for executing a process of charging, optical writing, development, transfer, separation, and cleaning on a photoreceptor, comprising: a cleaning unit;
A lock provided with a toner cartridge and a magazine provided with charging means detachably with respect to the apparatus main body, and for positioning and engaging the magazine at a predetermined position with the magazine.
Means and the charging means for releasing the pressure on the photoreceptor.
Pressure releasing means, wherein the locking means and the pressure releasing means are provided.
Integrated with the charging arm and lock arm.
The charging voltage is linked to the opening and closing of the magazine replacement cover.
Operate the release and lock arm to open the replacement cover.
Upon release, pressure release by the pressure release means and the lock
An electrophotographic recording apparatus characterized in that the lock is released by means .