JPS6157962A - Developing device using nonmagnetic one-component developer - Google Patents

Abstract

PURPOSE:To make a device compact and low-cost and to reduce the energy by connecting directly a carrier and a holding body through a transmission member and driving the carrier with the rotating force of the holding body. CONSTITUTION:A carrier 3 is supported freely rotatably on side walls 1a of a hopper 1 by supporting shafts 8, and discs 9 as transmission members are fitted and stuck to both end parts of the carrier 3, and these discs 9 are pressed to both end parts (non-image parts) of a holding body 6, and the rotating force of the holding body 6 is transmitted to the carrier 3 through discs 9. discs 9 consist of materials which have a high coefficient of friction and are superior inwear resistance such as a chloroprene rubber, a nitrile rubber, or the like, and they transmit the rotating force of the holding body 6 to the carrier 3 surely for a long time. Metallic rolls, resin rolls, or rolls obtained by coating these rolls with resin films may be used instead of discs 9. The carrier 3 and the holding body 6 may be provided with gears 10 and 11 biting each other to transmit the rotating force of the holding body 6 to the carrier 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a non-magnetic one-component developer that develops an electrostatic latent image formed on a carrier into a visible image using a non-magnetic one-component developer in an electrophotographic apparatus. The present invention relates to a device, in particular a mechanism for driving a carrier.

Conventional technology JP-A-47-130ε8 and JP-A-53-1673
2. Description of the Related Art As disclosed in Japanese Patent No. 41, etc., a non-magnetic one-component developing device is known in which a developer is sent to a holder using a carrier and an electrostatic latent image on the holder is developed into a visible image.

Such a non-magnetic one-component developing device has a simple structure.
It has the great advantage of being low in quantity and cost.

Problems to be Solved by the Invention Since the carrier and the holder are each driven independently, the drive mechanism becomes complicated and the advantages of the non-magnetic one-component developing device cannot be fully utilized.

It is important to drive the carrier and the holder in synchronization at a predetermined circumferential speed in order to obtain stable images, but since they are each driven independently, it is important to drive them in synchronization at a predetermined circumferential speed. Since it is difficult to drive, the image may have uneven density.

Means and action for solving the problem A carrier and a holder are directly connected via a transmission member so that the carrier can be driven by the rotational force of the holder.

Embodiment FIG. 3 is a schematic explanatory diagram of a non-magnetic one-component developing device, in which the non-magnetic one-component developer 2 in the flopper 1 is carried on a cylindrical carrier 3.
A thin and uniform developer layer is formed by the regulating member 4, and this developer layer is sent to the drum-shaped holder 6 which holds the electrostatic latent image 5 on the surface of the carrier 3. A developing bias 7 is applied to the electrostatic latent image 5 to cause the developer to adhere to the electrostatic latent image 5 for development.

FIG. 1 is a cross-sectional view of the driving part of the carrier, and the carrier 3 is rotatably supported on the side wall 1α of the hopper 1 by a support @lI8, and the carrier 3 has circles at both ends that serve as transmission members. When the plate 9 is fitted and fixed, the disc 9 is pressed against both ends (non-image area) of the holder 6.

The rotational force of the holder 6 is transmitted to the carrier 3 via the disc 9.

Front At disk 9'tl Made of materials with a high friction coefficient and excellent wear resistance such as chloroprene rubber and nitrile rubber), the rotating blade of the holder 6 reliably holds the J4 holder for a long period of time. This is so that it can be transmitted to 3.

In addition, a fully bent roll, a resin roll, or a
It is also possible to use a roll coated with a resin film.

Further, as shown in FIG. 2, gears 10, 11 which mesh with each other on the carrier 3 and the holder 6 may be provided to transmit the rotational force of the holder 60 to the carrier 3.

Toe 9. The rotational force of the holder 6 may be transmitted to the holder 3 by directly connecting the holder 3 and the holder 6 via a transmission member.

Although the holding body 6 is drum-shaped in the fifth and above embodiments, it may also be a belt-shaped holding body.

Effects of the Invention Since the carrier can be driven by the rotational force of the holder, there is no need to drive the carrier with a motor, which simplifies the drive mechanism, making the non-magnetic one-component developing device compact and low cost. At the same time, driving energy and energy can be reduced and energy can be saved.

Since the holder and the carrier are reliably driven in synchronization at a predetermined circumferential speed, the carrier is driven stably and a good image without uneven density can be obtained.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are cross-sectional views of a carrier driving part, and FIG. 3 is a schematic diagram of a non-magnetic one-component developing device. holding body. Applicant Masaaki Yonehara, patent attorney representing Fuji Xerox Co., Ltd.

Claims (1)

[Claims] A non-magnetic one-component developer is supplied to the surface of the carrier, a thin and uniform developer layer is formed by a regulating member, and this developer layer is
In a non-magnetic one-component developing device, the electrostatic latent image is sent to a holder holding an electrostatic latent image on its surface, and a developing bias is applied to the holder to cause a developer to adhere to the electrostatic latent image for development. A non-magnetic one-component developing device characterized in that it is directly connected to a holder via a transmission member.