JPS6047587B2 - developing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device for an image forming apparatus such as an electrophotographic copying machine.

For example, in an electrophotographic copying machine, powder developer is supplied to a developing device to perform development.

However, since the above-mentioned developer is made up of extremely fine particles, it is difficult to handle, and conventionally, there have been problems such as the developer being scattered around when the developer is supplied to a replenishment container or to a developing device. Furthermore, the storage condition of the developer in the developing device and supply container is not necessarily uniform, and especially in portable copying machines such as personal types, the storage condition changes every time the developer is carried, and the developer is stored unevenly. Sometimes.

To prepare for such a case, it has been considered to provide a stirring means to the developing device. However, for the personal type, a more reliable break-in method with a simpler mechanism was desired. The developing device for developing a latent image using the powder developer of the present invention includes a developer storage section for storing the developer and a developer supply section for supplying the developer to the latent image. and a sheet-shaped sealing member provided between the storage section and the supply section to seal the developer in the storage section; An unsealing member that disconnects the sealing member and communicates the storage section and the supply section by moving the device in the longitudinal direction; and a developer that stays unevenly in the developer supply section by moving the device in the longitudinal direction. It has a leveling member for leveling the agent in the longitudinal direction.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic cross-sectional view of the main body of a personal type copying machine. Reference numeral 1 denotes a document mounting table made of a transparent member, which reciprocates in the horizontal direction. Reference numeral 2 denotes a short focal length small diameter imaging element array, and an original image placed on an original placing table 1 is slit-exposed onto a photosensitive drum 3.

A charger 4 charges the photosensitive drum 3 uniformly.

The uniformly charged drum 3 is exposed to an image by the element array 2 to form an electrostatic image. Next, a head image is formed by the developing device 5 according to the present invention. On the other hand, the transfer paper P is fed onto the drum 3 by a paper feed roller 6 and a registration roller 7 that rotates at a timing such that it registers with the image on the photosensitive drum 3, and then is photosensitive by a transfer charger 8. The toner image on drum 3 is transferred onto transfer paper. Thereafter, the transfer paper P is separated from the drum 3 and guided by a guide 9 to a fixing device 10, where the toner image on the transfer paper is fixed, and then discharged onto a tray by a paper discharge roller 11. Additionally, a drum 3, a charger developing device 5, a cleaning device 1
3 is integrated with the main body to form a removable process kit, which simplifies maintenance by integral replacement.

FIG. 2 is a front sectional view of the developing device, and FIG. 3 is a side sectional view of the developing device. Above the developing device 5, which is a hopper-shaped container with a developing sleeve 14 disposed below, is a sheet 1.
This is a developer storage section partitioned into 6 sections. Below this reservoir is a supply section for supplying developer to the electrostatic image for developing the electrostatic image as described above. Above sheet 1
6 is preferably made of a material that is moisture-proof and easy to tear, and a stretchable rubber-like sheet is particularly suitable. A rod-shaped member 17 is disposed along the lower surface of the storage section, and one end of the rod-shaped member 17 is inserted through the side wall of the hopper container, and is provided with a handle 18. The other end of the rod-like member 17 inside the hopper container is provided with a leveling member 17b that engages and slides in a groove 19 formed in the longitudinal direction of the inner wall of the container, and an unsealing member 17a for tearing the container. It is being The leveling member 17b is a comb-like member extending downward, and the unsealing member 17a is a blade-like projection provided at the upper part. FIG. 4 is a partial perspective view of the storage section.

the above. The blade-shaped protrusion is located outside the developer storage section before the package is opened, and a slit opening 5b corresponding to the blade-shaped protrusion is formed in the side wall 5a of the storage section facing the blade-shaped protrusion. The slit opening 5b is also sealed with a sheet 16. The insertion portion 20 between the rod-shaped member 16 and the container is sealed with an elastic material such as moltoprene. Note that the number of the blade-like members does not necessarily have to be two, and may be one or three or more. In addition, the seal is not necessarily limited to an expandable sheet; for example, if the seal is bent slightly so that it is convex downward, and the central part is torn in the longitudinal direction with a single blade-like member to open the seal, the inside of the storage section can be sealed. Almost all of the developer falls smoothly into the lower part of the developing device 5. That is,
According to the present invention, when the operator pulls the handle of the rod-like member, the sheet is torn open by the blade-like member, so that the sheet is not affected by the environment.

Both sides of the sheet are torn in the longitudinal direction, but since the sheet is elastic, the remaining sheet shrinks and the developer remaining on its upper surface falls into the developer supply section below. Therefore, when pushing back the handle, since the opening has been enlarged due to the opening, the remaining sheet can be smoothed and uniformly coated without the blade-like member touching the remaining sheet. Of course, the above-mentioned uniformity can be achieved more effectively by operating the handle back and forth two to three times.

In particular, personal type copying machines, etc., are often carried around and are therefore prone to uneven development, but if you perform the above operations before copying, you can easily and reliably eliminate the above deviation and achieve good development. can contribute.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a copying machine having a developing device according to an embodiment of the present invention, FIG. 2 is a front sectional view of the developing device, FIG. 3 is a side sectional view of the developing device, and FIG. 4 is the same as described above. FIG. 3 is a partial perspective view of the developing device. Explanation of symbols, 5...Developing device, 5d...
・Storage part (storage container), 15...Developer, 16.
... Sheet, 17a ... Opening member (unsealing means), 17b ... Stirring member (stirring means), 1
7... Rod-shaped member.

Claims (1)

[Claims] 1. In a developing device for developing a latent image with a powder developer, the developing device includes a developer storage section that stores the developer and a developer supply section that supplies the developer to the latent image. integrally provided between the storage section and the supply section,
A sheet-shaped sealing member that seals the developer in the storage section, and a sheet-shaped sealing member located below the sealing member, which is opened by moving the developing device in the longitudinal direction to supply the developer to the storage section. and a rod-shaped member to which is attached an unsealing member that communicates with the developer supply section, and a leveling member that smoothes out the developer unevenly staying in the developer supply section in the longitudinal direction by a movement operation in the longitudinal direction. Characteristic developing device.