JPS60179761A - Fitting device of flat type charger - Google Patents

Abstract

PURPOSE:To easily connect and separate a flat type charger to and from a high- voltage power source, by fitting a discharging electrode and exciting electrode to the charger to be fitted and engaging the charger with a pair of electric power supplying electrodes connected with the high-voltage power source by sliding. CONSTITUTION:The discharging electrode 3 of a flat type charger 11 has thickness of several 10-100mu and manufactured by etching, thin film baking treatment, etc. On the other hand, the exciting electrode 2 of the charger 11 is also manufactured by the above-mentioned treatment, but the electrode 2 except the part 2a to be connected with a high-voltage power source is buried in a dielectric body 1 for safety. When the charger 11 is pushed along a guide member, the discharging electrode 3 and exposed part 2a of the exciting electrode 2 are smoothly pushed between end parts of a pair of oplate springs 19 and 19 and engaged with the springs 19 and 19. Since the plate springs 19 and 19 are connected with a high-voltage power source, the discharging electrode 3 and exciting electrode 2 are surely connected with the high-voltage power source through the pair of plate springs 19 and 19.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for attaching a flat charger that uses creeping discharge to an object to be attached such as a copying machine, and particularly to a connection structure with a high-voltage power source.

As shown in FIG. 1, the principle of the conventional flat charger is that an excitation electrode 2 is provided on the back surface of a dielectric 1, a comb-shaped discharge electrode 3 is provided on the surface of the dielectric 10, and the discharge electrode 3 and the excitation electrode 2 are provided on the surface of the dielectric 10. By applying an AC voltage between the electrodes 20, negative ions are generated by creeping discharge, and by applying a direct voltage, ions having the same polarity as the DC voltage are transferred to the charged object 4 such as a photoreceptor.
It is pressured so that it flows.

5 is an AC power supply and bB DC power supply.

Such a flat charger has the disadvantage that, because it is thin, its strength is weaker than that of Protron, and because it uses ceramics as a dielectric, it is brittle.

Therefore, it is considered to add a metal plate for reinforcement to compensate for the mechanical weakness, but since high-frequency alternating current is applied, the apparent power increases and the power consumption becomes excessive. .

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

However, on the other hand, if the structure is simple, it becomes extremely difficult to connect it to a high-voltage power source.

However, since the flat charger is very thin (approximately 11111 mm), it cannot be connected to a high-voltage power source using screws or pins like a corotron, making it difficult to connect to a high-voltage power source. It ends up.

OBJECT OF THE INVENTION It is an object of the invention to enable a flat charger to be easily connected to or separated from a high-voltage power source even in a trench with a simple structure without affecting the original function of the flat charger.

Structure of the Invention A flat charger is attached to an object to be attached by sliding and engaging a discharge electrode and an excitation electrode between a pair of power supply electrodes attached to the object and connected to a high-voltage power source. Something like that.

Embodiment FIG. 2 is a schematic perspective view of the area around the photoreceptor of an electronic copying machine. Around the photoreceptor 10, there are a flat charger 11, an exposure slit 12, a developing device 13, and a transfer charger 14. A sheet of paper 15 is provided for copying onto a sheet 15 by a copying process well known in the art.

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 to the frame 16 of the electronic copying machine, which is the object to be mounted, with screws 18. A pair of plate springs 19 and 19, which serve as a pair of power supply electrodes, are embedded and fixed in this insulating fixing member 17, and the tip portion 19a of the plate spring 19 is curved in a substantially wave shape. , a pair of leaf springs 19. The flat charger 11 is attached to the frame 16 by sliding the tip of the flat charger 11 between the tips 19a, 19a of the *q.

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

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

The distance between the tip portions 191° 19a of the pair of leaf springs 19.19 is slightly smaller than the distance between the exposed portion 2a of the discharge electrode 3 and the excitation electrode 2, so that the tip portions 19a of the pair of leaf springs 19.19, The flat charger 11 can be inserted between the electrodes 19a 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 come into contact with each other.

When the flat charger 11 is pushed along a guide member (not shown), the tips 19 of the pair of leaf springs 19°19
Exposed portion 2a of discharge electrode 3 and excitation electrode 2 between a and 19a
slide smoothly into engagement.

When the dielectric member 1 is further pushed in, the end face of the dielectric member 1 is brought into contact with the insulating fixing member 17 and positioned, and the flat charger 11 is positioned and attached to the photoreceptor 10 which is the object to be charged.

Further, the pair of leaf springs 19.19 are connected to a high voltage power source (not shown), and the discharge electrode 3 is connected via the pair of leaf springs 19.19.
and excitation electrode 2 are reliably connected to a high voltage power source.

As described above, the flat charger 11 can be constructed without any special shape, without affecting its original function, and with a simple configuration (basically, the cross-sectional shape of the part necessary for discharging is the overall shape). can be easily connected to or separated from the high-voltage power supply (without changing the configuration).

Therefore, the process of manufacturing the flat charger is simplified.

For example, if an insulating member for taking out the connecting electrode/pole is separately prepared and assembled, the manufacturing process will increase accordingly and the cost will be high.

Note that the power supply electrode is not limited to a plate spring, and may be any electrode as long as the exposed portions of the discharge electrode and excitation electrode slide smoothly and are reliably engaged when the flat electrode is pushed in.

Effects of the Invention The flat charger can be easily connected to or separated from a high-voltage power source with a simple configuration without affecting the original function of the flat charger.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the principle of a flat charger, Fig. 2 and subsequent figures show embodiments of the present invention, Fig. 2 is a schematic perspective view of the area around the photoreceptor of an electronic copying machine, and Fig. 3 is a flat charger. Cross-sectional view of the mounting part of the device,
FIG. 4 is a schematic perspective view thereof. 2 is an excitation electrode, 3 is a discharge electrode, 11 is a flat charger, 19 is an electric power supply power applicant, Fuji Xerox Co., Ltd. agent, patent attorney, Masaaki Yonehara, patent attorney, Tadashi Fukumi, Figure 1 to 2.

Claims (1)

[Claims] By connecting the discharge electrode 6 and the excitation electrode 2 of the flat charger 11 to a high voltage power source and sliding them into engagement between a pair of power supply electrodes 19' and 19 attached to the object to be attached, A mounting device for a flat charging device, characterized in that a charging device 11 is mounted on an object to be mounted.