JPS62156670A - Photosensitive body cartridge structure - Google Patents

Abstract

PURPOSE:To simplify and miniaturize a cartridge structure and reduce cost by constituting a cartridge frame so that a space part to be a waste toner vessel is formed in the opposite side of a blade to a photosensitive drum. CONSTITUTION:A cleaner unit 3 in a photosensitive body cartridge consists of a blade 30 which scrapes a toner remaining on the surface of a photosensitive drum 1, a waste toner vessel 31, a waste toner recovering rotating plate 32 which sends the toner scraped by the blade to the waste toner vessel 31 as a waste toner by rotating, and a partitioning plate 33 which demarcates the waste toner vessel 31. An aperture is formed under the partitioning plate 33, and the waste toner is sent into the waste toner vessel 31 through this aperture part. A space part is formed with a frame 6 in the opposite side of the blade 30 to the photosensitive drum to constitute the waste toner vessel 31. That is, the waste toner vessel 31 is formed directly with inside walls of an upper frame 6a and a lower frame 6b and the partitioning plate 33.

Description

[Detailed Description of the Invention] Technical Field> This invention relates to the structure of a photoreceptor cartridge that integrally constitutes a photoreceptor drum and its peripheral parts <Prior art and its disadvantages> Miniaturization of image forming apparatuses such as copying machines In line with this trend, photoreceptor cartridges in which a photoreceptor drum and its peripheral parts are integrally constructed have been put into practical use. According to such a cartridge structure, when it is time to replace the photosensitive drum or the like, the user can easily replace the photosensitive drum or the like without calling a serviceman. Examples of peripheral parts that are integrally formed with the photoreceptor drum include a charger, a transfer unit, a cleaner unit, and the like. The cleaner unit includes a blade for scraping off residual toner on the surface of the photoreceptor, and a waste toner container for collecting the toner scraped off by the blade. In conventional photoreceptor cartridges, the cleaner unit is constructed as an independent component and is attached to the cartridge frame with screws or the like during cartridge assembly.

However, in such a structure, it is necessary to configure the cleaner unit parts as a rod separately from the cartridge frame, and it is also necessary to assemble the cleaner unit to the cartridge frame, which complicates the structure, reduces workability, and increases cost. It had the disadvantage that it was expensive.

<Object of the Invention> An object of the present invention is to provide a photoreceptor cartridge structure in which a space is formed in the cartridge frame itself and the space serves as a waste toner container.

<Configuration and Effects of the Invention> The present invention is characterized in that the cartridge frame is configured to form a space serving as a waste toner container on the opposite side of the blade from the photosensitive drum.

With this configuration, according to the present invention, a space is formed on the opposite side of the blade from the photosensitive drum when the cartridge frame is molded, so this space automatically becomes a waste toner container. Therefore, there is no need to separately construct an independent component that serves as a waste toner container, and there is an advantage that the bone structure is simplified, the size is smaller, and the cost is further reduced.

<Embodiment> FIG. 2 is a schematic configuration diagram of a copying machine in which the present invention is implemented. The photoreceptor drum 1 is integrally attached to a cartridge frame (hereinafter simply referred to as frame) 6 together with a 1st charger 2, a cleaner unit 3, a stripping unit 4, and an exposure opening (exposure opening h) 5 located around the photoreceptor drum. It constitutes a cartridge (hereinafter simply referred to as a cartridge) 7. This cartridge 7 is removably attached to the copying machine main body 8. When the front panel of the copying machine main body 8 is opened and the cartridge 7 is pushed forward in a direction perpendicular to the page, the cartridge 7 is installed in the copying machine main body 8. Conversely, when the cartridge 7 is pulled out toward the front, the cartridge 7 is removed from the copying machine main body 8. The cartridge 7 is attached to and removed from the copying machine main body 8 by a guide mechanism including a rail (not shown). A convergent light transmitter 9 is placed above the exposure slit 5, and a light source 1 is provided on the left side of the convergent light transmitter 9.
0 constitutes an optical system. The original placed on the original table 11 is scanned by light from the light source 10 as the original table 11 moves horizontally, and is exposed onto the photosensitive drum 1 via the convergent light transmitter 9. Photosensitive drum 1
rotates in the direction of the arrow in the figure, and after being uniformly charged by the charger 2, is exposed to light passing through the exposure slit 5.

Next, the image is visualized by the developing device 12, and the visualized image is transferred onto the paper at the position of the transfer charger 13. Paper is stored in the paper cassette I4 installed at the bottom of the copying machine main body 8.
The paper is fed by the paper feed roller 15 from the paper feed roller 15 . The paper onto which the image on the photoreceptor drum has been transferred by the transfer charger 13 is peeled off from the photoreceptor drum 1 at the position of the peeling unit 4, and is conveyed to the position of the fixing roller 16 where it is fixed. Note that the paper discharge tray 17 can be rotated about the pin 18 in the direction of the arrow in the figure. When performing a copying operation, the paper discharge tray 17 is rotated counterclockwise around the pin 18 from the position shown in the figure and fixed at a position substantially parallel to the copying machine main body 8. Further, the developing unit 12 includes two developing sections, and can use either developing section by rotating.

FIG. 1 shows a sectional view of the cartridge 7. As shown in FIG.

The frame 6 is composed of an upper frame 6a and a lower frame 6b, and the upper and lower frames 6a and 6b are fastened together with screws 19. A rotating shaft of the photoreceptor drum 1, a first charger 2, a cleaner unit 3, and a peeling unit 4 are attached to the frame 6, and a portion of the photoreceptor drum 1 facing the exposure section A is opened to form an exposure slit 5. has been done.

The cleaner unit 3 includes a blade 30 for scraping off toner remaining on the surface of the photoreceptor drum 1, a waste toner container 31, and a waste toner container 31 by rotating the toner scraped off by the blade 30. The waste toner container 31 is composed of a rotary plate 32 for collecting waste toner, and a partition plate 33 for partitioning the waste toner container 31. The lower part of the partition plate 33 is open, and waste toner is sent into the waste toner container 31 from this part. Waste toner container 31
is constructed by forming a space with the frame 6 on the side of the blade 30 opposite to the photoreceptor drum. That is, as shown in the figure, the waste toner container 31 is attached to the upper frame 6a.
, is directly formed by the inner wall of the lower frame 6b and the partition plate 33.

The peeling unit 4 includes a peeling chip 140, a peeling roller 41, a pressure roller 42, a drive gear (not shown) for the peeling roller 41, and springs 43, 44, and is constructed as a unit in which these are fixed to a frame. It is fixed to the rear end of the lower frame 6b. One end of the release tape 40 is secured to point A of the lower frame 6b, and the other end is secured to a spring 43 such that the surface of the release tape contacts the rear end surface of the photoreceptor drum I. This spring 43 applies tension to the release tape 40. The peeling roller 41 is driven by a peeling roller drive gear located behind the peeling roller 41, and feeds the sheet forward while sandwiching the paper between it and the back surface of the peeling tape 40. The pressure roller 42 presses the release tape 40 against the release roller 41 . This pressure contact force is applied to the spring 4
given by 4.

According to the photoreceptor cartridge structure of this embodiment as described above, the waste toner container 31 is formed simply by assembling the upper frame 6a and the lower frame 6b. Therefore, the overall structure of the cartridge is simplified and small, and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a photoreceptor cartridge according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a copying machine in which the photoreceptor cartridge is used. 1-Photoconductor drum, 3-Cleaner unit, 30-Blade, 31-Waste toner container, 6-Cartridge frame, 7-Photoconductor cartridge.

Claims (1)

[Claims] (1) In a photoreceptor cartridge integrally configured with a photoreceptor drum and its peripheral parts, the peripheral part is provided with a blade for scraping off residual toner on the surface of the photoreceptor drum, and a toner is disposed on the opposite side of the blade from the photoreceptor drum. A photoreceptor cartridge structure, wherein the cartridge frame is configured to form a space serving as a toner container.