JPH0422742U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the main parts of a copying machine as an image forming apparatus according to this invention, FIG. 2 is a simplified overall configuration diagram of the entire copying machine, and FIG. 3 shows a coil spring with a small diameter Fig. 4 is a perspective view showing another embodiment in which a leaf spring is used as the elastic member, and Fig. 5 is a holder that guides and holds a coil spring on the cover of a high voltage power supply. FIGS. 6 and 7 are perspective views showing further different embodiments in which the end block of the transfer corona discharger is formed with a leg part, and a holder part is formed on the lower body side opposite to the leg part. A schematic diagram and an exploded perspective view showing the main parts of an embodiment of a copying machine in which a guide wall is formed, and FIG. 8 is a perspective view showing an example in which the board is covered with a cover leaving a guide hole in the holder part. , Fig. 9 is a perspective view for explaining the connection between the charger and the high-voltage power supply of a conventional copying machine and the grounding method thereof, and Fig. 10 is a conventional copying machine in which the upper body is formed to be openable and closable with respect to the lower body. FIG. 2 is a schematic diagram showing only a part of an example. 30...Transfer corona discharger (charger), 31...
...lower main body, 32 ... upper main body, 32a ... part, 33 ... photoreceptor (charged body), 40 ... high voltage power supply, 43 ... casing, 44, 61, 62 ...
End block, 47... Board, 47a... Ground surface, 48... Cover, 48a, 64... Holder portion, 49... Coil spring (elastic member), 5
5...Plate spring (elastic member), 61a, 61b, 6
2a, 62b... Leg portion, 61c, 62c... Reference abutting portion, 65, 66a, 66b, 67a, 6
7b...Guide wall.

Claims (1)

[Claims for Utility Model Registration] 1. In an image forming apparatus in which the casing of the charger is grounded to the main body of the device through an elastic member, a ground contact point on the side of the main body of the device is formed on a substrate of a high-voltage power supply. An image forming apparatus characterized in that the elastic member is fixed to a surface or a ground surface thereof, and the ground surface is exposed to the outside of the cover of the high voltage power supply. 2. In an image forming apparatus in which the casing of the charger is grounded to the apparatus main body via an elastic member, the contact on the apparatus main body side is a ground surface formed on a board of a high-voltage power supply, and the ground surface The image forming apparatus is characterized in that a holder portion is formed integrally with the cover, the elastic member being a coil spring being exposed to the outside of the cover of the high voltage power source, and guiding and holding the coil spring. 3. The image forming apparatus according to claim 2, wherein the apparatus main body includes a lower main body and an upper main body releasably attached to the lower main body, and the charger is removably provided on the lower main body. Further, a charged object is disposed in the upper body, and the holder portion is formed at a position of the lower body facing the end block of the charger,
A guide wall is formed integrally with the holder part, and the end block includes a leg part that engages with the guide wall, and a leg part that engages the leg part with the guide wall so as to form a part between the end block and the lower main body. and a reference abutment part whose position is regulated by the end block coming into contact with the charged object or a part of the upper body when the upper body is closed by inserting the coil spring therein. An image forming apparatus characterized by: