JP2511214Y2 - Image forming device charger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a charger for an image forming apparatus such as an electrostatic copying machine provided with a charger for transfer and a charger for charge removal (peeling). .

[Conventional technology]

In the above electrostatic copying machine, as shown in FIG. 5, the image of the original placed on the upper surface of the main body a and on the platen c covered by the platen cover b is the exposure optical image. The system d exposes the photoconductor f previously charged by the charger e to form an electrostatic latent image on the photoconductor f. Then, this electrostatic latent image is developed into a toner image by the developing device g, and this toner image is transferred onto the paper fed from the paper feeding device i under the application of a voltage by the transfer charger h. The sheet is peeled off from the photoconductor f by removing the electric charge by the discharging charger j, then fixed by the fixing device k, and discharged to the discharge tray l.

However, the transfer charger h and the discharging charger j
Is detachable from the main body a for these maintenances. Therefore, the chargers h and j and the high voltage power supply provided on the main body a side for supplying high voltage current to the chargers h and j can be connected and disconnected. It is connected to the.

However, a conventional power feeding device for the above charger is disclosed in Japanese Patent Laid-Open No. 62-164.
As in the configuration shown in No. 020, a connector made of a plate material was provided at the end of the charger, and a jack provided on the feeder side was inserted into this connector for connection.

[Problems to be solved by the device]

In the above-described power supply device for the charger, since the connection part for power supply is composed of the connector and the jack inserted therein, the configuration of this connection part becomes complicated,
Cost was high. Further, due to repeated insertion and removal, contact failure may occur due to deformation or wear of one or both.

The present invention has been made in view of the above, and the structure of the connecting portion for the above-mentioned power feeding is simplified, the cost can be reduced in this portion, and the occurrence of contact failure in the connecting portion can be prevented. It is an object of the present invention to provide a charger for an image forming apparatus that can prevent such a problem.

[Means for solving the problem]

In order to achieve the above object, the charger of the image forming apparatus according to the present invention holds a transfer discharge wire facing the photoconductor and a plate-shaped charge elimination needle by a holding member formed of an insulating member. In the charger of the image forming apparatus, the transfer electrode connected to the power supply side end of the transfer discharge wire,
Providing a power supply terminal projecting downward on the power supply side, extending the static elimination needle to the power supply unit side, and bending it below the power supply unit,
A horizontal power supply terminal is provided at the tip, and the upper side of the horizontal part is supported by a pressing support leg protruding from a cover that covers the power supply section. The power supply terminals of both electrodes are spring-like lead wires on the power supply side. It is designed to be connected to the power supply side by pressing.

[Action]

The tips of the transfer electrode and the static elimination electrode of the charging section of the charger are pressed against the spring-like lead wires provided on the main body side to conduct electricity, and at this time, the tips of the plate static elimination electrodes are covered by the cover. It is supported by the pressing support legs provided so as not to be deformed.

〔Example〕

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

FIG. 4 shows the whole of the charging device. In FIG. 4, 1 is a charging device. The charging device 1 is a holding member 3 made of an insulating material, and a transfer member extended over the entire length of the holding member 3. A discharge wire 4 for use, a discharge needle 6 formed in the shape of a plate that is laterally separated from the discharge wire 4 by a shield 5 and is fixed in parallel, and is provided adjacent to the discharge needle 6. The guide plate 7, a power feeding portion 8 provided on one side of the holding member 3, a cover 9 that covers the power feeding portion 8, and the like.

The power feeding part 8 is as shown in FIGS. 1 to 3, and the transfer electrode 10 and the charge eliminating electrode 11 are installed in the space separated by the shield 5 in the power feeding part 8. The transfer electrode 10 is made of a plate material, and an intermediate portion thereof is fixed to the holding member 3 by a pin 12. One side of the transfer electrode 10 is erected upward, and one end of the transfer discharge wire 4 is connected to the tip of the transfer electrode 10 via a spring 13. The other side portion of the transfer electrode 10 is bent downward, and the tip end portion thereof has a sword shape.

The static elimination electrode 11 is constructed by extending one end of the static elimination needle 6 formed in a plate shape. And this static elimination electrode
Reference numeral 11 is laterally bent in a stepwise manner, and has a horizontal power supply terminal 11a at its tip.

The terminal portions extending below the electrodes 10 and 11 are surrounded by tubular portions 3a and 3b integrally formed with the holding member 3.

The cover 9 is adapted to be disengageably engaged with the power feeding portion of the holding member 3. Below the cover 9, when the cover 9 is locked to the power feeding portion of the holding member 3, the tip of the static elimination electrode 11 is located horizontally.
A pressing support leg 14 that abuts on a is projected.

FIG. 3 shows a state in which the power feeding part of the charger 1 is connected to the power feeding part on the main body side. The transfer terminal of the power feeding part on the main body side is shown.
Each of the electrodes on the charger 1 side is attached to each of 15 and the static elimination terminal 16.
The terminal portions of 10 and 11 are connected via spring-like lead wires 17a and 17b. The spring-like lead wires 17a and 17b are locked to the terminals 15 and 16 of the main body 18 side.
The power supply terminals of the electrodes 10 and 11 on the charger 1 side are pressed against a and 17b.

In the above configuration, with the charger 1 mounted on the main body 18, the power supply terminal at the tip of the transfer electrode 10 of the power supply unit 8 of the charger 1 and the horizontal power supply terminal 11a of the static elimination electrode 11 are connected to the main body 18
The spring-like lead wires 17a, 17b provided on the side are pressed to be electrically connected thereto.

At this time, since the horizontal portion of the power supply terminal 11a of the static elimination electrode 11 is pressed from above by the pressing support legs 14 of the cover 9, even if the static elimination electrode 11 is thin and easily deformed, it must be deformed. The spring-like lead wire 17b is contacted with no pressure and with a strong pressing force.

[Effect of device]

According to the present invention, the structure of the connecting portion between the power feeding portion of the charger 1 and the power feeding terminal on the main body side is simplified, and it is possible to reduce the cost in this portion. Further, it is possible to prevent the occurrence of poor contact at the connection portion.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
The figure is a perspective view with the cover of the main part removed, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is a perspective view showing the entire charger. It is a figure. FIG. 5 is a structural explanatory view schematically showing an electrostatic copying machine. 1 is a charger, 3 is a holding member, 4 is a discharge wire for transfer,
6 is a discharging needle, 8 is a power feeding portion, 10 is a transfer electrode, 11 is a discharging electrode, and 17a and 17b are spring-like lead wires.

Claims (1)

(57) [Scope of utility model registration request] 1. A charging device of an image forming apparatus, comprising a transfer discharge wire facing a photoconductor and a plate-shaped charge eliminating needle held by a holding member formed of an insulating member. The transfer electrode, which connects to the end of the wire on the power supply side, is provided with a power supply terminal below the power supply part, and the static elimination needle is extended to the power supply part side, and bent to the lower side of the power supply part to be horizontal to the tip part. The above-mentioned power supply terminals are provided, and the upper side of the horizontal part is supported by the pressing support legs protruding from the cover that covers the power supply part, and the power supply terminals of both electrodes are pressed against the spring-like lead wires on the power supply side. The charger of the image forming apparatus is characterized in that it is connected to the power source side by the.