Image Forming Apparatus

Abstract

An image forming apparatus includes a placement tray, an image forming unit, a drive unit, a control substrate, a power supply substrate, a high-voltage substrate, and low-voltage power supply harnesses. The placement tray holds a recording sheet thereon. The image forming unit forms an image on the recording sheet. The drive unit supplies driving force to the image forming unit. The control substrate controls the drive unit. The power supply substrate supplies electric power to the control substrate. The high-voltage substrate is disposed in one side of the placement tray. In the high-voltage substrate, voltage is generated higher than voltage in the power supply substrate. The low-voltage power supply harnesses are disposed in another side of the placement tray so as to supply electric power from the power supply substrate to the control substrate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described below, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a sectional side view showing a schematic structure of a laser printer according to an embodiment of the present invention;

FIG. 2 is a perspective view showing the laser printer wherein a housing and a paper feed tray of the printer are removed therefrom;

FIG. 3 is a view on arrow A in FIG. 2 showing the schematic structure of the laser printer according to the embodiment;

FIG. 4 is a side view showing the left side of the printer shown in FIG. 3;

FIG. 5 is a side view showing the right side of the printer shown in FIG. 3 wherein the paper feed tray is removed;

FIG. 6 is a right side perspective view showing a positional relation between a frame and a high-voltage power supply substrate for a charger of the printer according to the embodiment;

FIG. 7 is a left side perspective view showing a positional relation between the frame and a drive unit control substrate of the printer according to the embodiment; and

FIG. 8 is a perspective view showing a connection of the respective substrates of the printer according to the embodiment.

Claims

1. An image forming apparatus comprising: a placement tray that holds a recording sheet thereon;an image forming unit that forms an image on the recording sheet;a drive unit that supplies driving force to the image forming unit;a control substrate that controls the drive unit;a power supply substrate that supplies electric power to the control substrate;a high-voltage substrate, disposed in one side of the placement tray, in which voltage is generated higher than voltage in the power supply substrate; andlow-voltage power supply harnesses disposed in another side of the placement tray so as to supply electric power from the power supply substrate to the control substrate.

2. The image forming apparatus as set forth in claim 1 further comprising a frame including: a first side-frame;a second side-frame disposed so as to face the first side-frame in a horizontal direction; anda bottom frame disposed in a bottom portion of a body of the image forming apparatus so as to connect bottom portions of the first and the second side-frames,wherein the image forming unit, the high-voltage substrate and the placement tray are disposed between the first and the second side-frames, andwherein the low-voltage power supply harnesses are disposed along the bottom frame.

3. The image forming apparatus as set forth in claim 2, wherein the placement tray is installed in the body of the image forming apparatus in an attachable/detachable manner,wherein the body of the image forming apparatus is provided with an installation opening through which the placement tray is installed, andwherein the low-voltage power supply harnesses are disposed along a top surface of the bottom frame.

4. The image forming apparatus as set forth in claim 3 wherein the low-voltage power supply harnesses are disposed on a portion of the bottom frame in vicinity of the installation opening.

5. The image forming apparatus as set forth in claim 3 further comprising a protection cover that covers the low-voltage power supply harnesses.

6. The image forming apparatus as set forth in claim 5 wherein the low-voltage power supply harnesses are sandwiched between the protection cover and the bottom frame.

7. The image forming apparatus as set forth in claim 2, wherein the first and the second side-frames are formed approximately in a plate shape so as to extend in a vertical direction,wherein the power supply substrate is attached to the first side-frame so as to extend approximately in parallel to the first side-frame, andwherein the control substrate is attached to the second side-frame so as to extend approximately in parallel to the second side-frame.