JPH0642100B2 - Mounting device for flat charger - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching a flat charger applying bath surface discharge to an object to be attached such as a copying machine, and more particularly to a connection structure with a high voltage power source.

As shown in FIG. 1, the principle of the conventional flat charger is to provide an excitation electrode 2 on the back surface of a dielectric 1 and a comb-shaped discharge electrode 3 on the surface of the dielectric 1, By applying an AC voltage between the excitation electrodes 2, positive and negative ions are generated by the discharge on the bath surface, and a DC voltage is applied to generate ions having the same polarity as the DC voltage to the charged body 4 such as a photoconductor.
It was made to flow to.

Reference numeral 5 is an AC power supply, and 6 is a DC power supply.

Since such a flat type charger is thin, its strength is weaker than that of a corotron, and it has a fragile defect because it uses ceramics as a dielectric.

Therefore, it is conceivable to additionally attach a metal plate to reinforce the mechanical weakness, but apparent power increases and power consumption becomes excessive because high-frequency alternating current is applied. .

Therefore, in terms of power consumption, it is desirable for the flat charger to have a structure that is as simple as possible without adding a metal plate or the like.

However, on the other hand, if it has a simple structure, it will be very difficult to connect to a high-voltage power supply.

In other words, since the flat charger has a very thin thickness of about 1 mm, it cannot be connected to a high voltage power source by using screws, pins, etc. like a corotron, and it is difficult to connect to the high voltage power source. .

An object of the present invention is to make it possible to easily connect to or disconnect from a high voltage power source with a simple structure without affecting the original function of the flat charger.

Configuration of the Invention In a flat charger mounting device according to the present invention, a discharge electrode 3 is provided on a surface of a plate-shaped dielectric 1 up to one end of the dielectric 1 in the longitudinal direction. The excitation electrode 2 is provided on the back surface of the dielectric electrode 1 so as to face the discharge electrode 3, and one end of the dielectric 1 in the longitudinal direction of the back surface is partially cut away to expose one end 2a of the excitation electrode 2 in the longitudinal direction. As a result, a flat charger is provided, and a pair of elastic power supply electrodes are attached to the attached portion, and the distance between the tips of the power supply electrodes is the discharge electrode 3 and the excitation electrode 2 of the flat charger.
The discharge electrode 3 is attached so as to be slightly smaller than the distance between the discharge electrode 3 and the tip of the pair of power supply electrodes.
And a partially notched portion at one longitudinal end of the flat charger is inserted and attached.

Embodiment FIG. 2 is a schematic perspective view of a peripheral portion of a photoconductor of an electronic copying machine. A flat charger 11, an exposure slit 12, a developing device 13, a transfer charger 14 and the like are provided around the photoconductor 10. It is arranged so that it can be copied onto the paper 15 by a conventionally known copying process.

FIG. 3 is a cross-sectional view of the mounting portion of the flat charger 11, and FIG. 4 is a schematic perspective view. An insulating fixing member 17 is fixed by screws 18 to the frame 16 of the electronic copying machine to be mounted. A pair of leaf springs 19 and 19 serving as a pair of power supply electrodes are embedded and fixed in the insulating fixing member 17, and a tip end portion 19a of the leaf spring 19 is curved in a substantially wave shape and is paired. The flat type charger 1 is slidably engaged with the flat type charger 1 between the end portions 19a, 19a of the leaf springs 19, 19 of the flat type charger 1.
1 is attached to the frame 16.

The discharge electrode 3 of the flat charger 11 has a thickness of about several tens of microns to 100 microns, and is formed by etching or thick film baking.

On the other hand, the excitation electrode 2 is also made in the same manner as described above, but for safety, the part connected to the high voltage power supply (that is, one end)
Parts other than 2a are buried in the dielectric 1.

The distance between the tip portions 19a, 19a of the pair of leaf springs 19, 19 is made slightly smaller than the distance between the discharge electrode 3 and the exposed portion 2a of the excitation electrode 2 so that the tip portions 19a, 19a of the pair of leaf springs 19, 19 are formed. The flat charger 11 can be inserted therebetween with a small force, and the spring force of the leaf spring 19 ensures that the discharge electrode 3 and the exposed portion 2a of the excitation electrode 2 are brought into contact with each other.

Then, when the flat charger 11 is pushed along a guide member (not shown), the tip end portions 19 of the pair of leaf springs 19 and 19 are pushed.
Exposed portion 2a of discharge electrode 3 and excitation electrode 2 between a and 19a
Are smoothly slid and engaged.

When it is further pushed, the end surface of the dielectric 1 comes into contact with the insulating fixing member 17 and is positioned, and the flat charger 11 is positioned and attached to the photoconductor 10 which is the body to be charged.

The pair of leaf springs 19 and 19 are connected to a high voltage power source (not shown), and the discharge electrode 3 is connected via the pair of leaf springs 19 and 19.
And the excitation electrode 2 are reliably connected to the high voltage power supply.

As described above, the flat charger 11 does not have to have a special shape and has a simple structure that affects the original function (that is, the entire structure is basically composed of a cross-sectional shape of a portion necessary for discharging). Easy to connect and disconnect from high voltage power supply (as is).

Therefore, the manufacturing process of the flat charger is simplified.
For example, if a separate insulating member for taking out the connection electrode is separately prepared and combined, the number of manufacturing processes increases and the cost increases.

The power supply electrode is not limited to the leaf spring, and may be any one that allows the exposed portions of the discharge electrode and the excitation electrode to slide smoothly and securely when the flat electrode is pushed.

Effects of the Invention By moving the flat charger in its longitudinal direction and inserting or withdrawing it between the tips of the pair of power supply electrodes,
The longitudinal ends of the excitation electrode 2 and the discharge electrode 3 can be connected to or separated from the power supply electrode,
The original function of the flat charger is not adversely affected, and the flat charger can be easily connected to or separated from the high-voltage power source with a simple configuration.

Further, the excitation electrode 2 is physically provided except that one end portion in the longitudinal direction of the back surface side of the flat charger is partially cut away to expose the one end portion 2a in the longitudinal direction of the excitation electrode 2.
Not only can prevent the object from coming into contact with other objects and be damaged, but it also helps improve safety, and
The flat charger can be securely inserted between the tips of the pair of power supply electrodes by using the partially notched portion at one end in the longitudinal direction as a guide, and the flat charger can be more easily connected to and separated from the high-voltage power supply. It will be.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of a flat charger, FIG. 2 and subsequent drawings show an embodiment of the present invention, FIG. 2 is a schematic perspective view of a peripheral portion of a photoconductor of an electronic copying machine, and FIG. 3 is a flat charger. Sectional view of the mounting part of the vessel,
FIG. 4 is a schematic perspective view thereof, and FIG. 5 is a rear perspective view of a mounting portion of the flat charger. Reference numeral 1 is a dielectric, 2 is an excitation electrode, 3 is a discharge electrode, and 11 is a flat charger.

Claims (1)

[Claims] 1. A discharge electrode 3 is provided on the surface of a plate-shaped dielectric 1 up to the one end of the dielectric 1 in the longitudinal direction, and an excitation electrode 2 is provided on the back surface side of the dielectric 1. 3, one end of the dielectric body 1 in the longitudinal direction is longitudinally cut away by partially cutting out one end of the dielectric 1 in the longitudinal direction on the back surface side.
a is exposed to form a flat charger, and a pair of elastic power supply electrodes are attached to the attached parts, and the discharge electrodes 3 and the excitation electrodes 2 are electrically connected to each other with the distance between the tips of the power supply electrodes being flat.
The discharge electrode 3 is attached so as to be slightly smaller than the distance between the discharge electrode 3 and the tip of the pair of power supply electrodes.
And a mounting device for a flat charger, characterized in that the flat charger is mounted by inserting a partially notched portion at one longitudinal end thereof.