Plurality of boards mounted on image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorTatsuya Suzuki
Life of this patent
Estimating the term…
Abstract
A first connector is soldered to a first board. A second connector is soldered to a second board. A third connector and a fourth connector are soldered to a relay board. The third connector is connected to the first connector via a first power line. The fourth connector is connected to the second connector via a second power line. A surface to which the first connector is soldered on the first board is opposite to a surface to which the first connector is attached on the first board. A surface to which the second connector is soldered on the second board is a surface to which the second connector is attached on the second board. Only surface-mount devices are used as electronic components soldered to the second board.
Claims14
An image forming apparatus comprising:
- an image forming unit configured to form an image on a sheet;
- a fixing unit including a heater, and configured to fix the image on the sheet;
- a first board including a power supply circuit that generates a predetermined direct-current voltage from an alternating-current voltage supplied from a commercial alternating-current power supply, the power supply circuit configured to apply the alternating-current voltage to the heater;
- a second board configured to control the image forming unit based on the predetermined direct-current voltage generated by the power supply circuit;
- a first connector soldered to the first board;
- a second connector soldered to the second board;
- and
- a relay board to which a third connector and a fourth connector are soldered, the third connector being connected to the first connector of the first board via a first power line, the fourth connector being connected to the second connector of the second board via a second power line,
- wherein a surface to which the first connector is soldered on the first board is opposite to a surface to which the first connector is attached on the first board,
- a surface to which the second connector is soldered on the second board is a surface to which the second connector is attached on the second board,
- only surface-mount devices are used as electronic components soldered to the second board, including the second connector,
- the number of pins in the second connector is larger than the number of pins in the first connector,
- the number of pins in the fourth connector is larger than the number of pins in the third connector, and
- the predetermined direct-current voltage generated by the power supply circuit is supplied to the second board by way of the relay board.
An image forming apparatus comprising:
- an image forming unit configured to form an image on a sheet;
- a fixing unit including a heater, and configured to fix the image on the sheet;
- an AC driver board configured to apply an alternating-current voltage supplied from a commercial alternating-current power supply to the heater;
- a power supply board configured to generate a predetermined direct-current voltage from the alternating-current voltage;
- a control board configured to control the image forming unit based on the predetermined direct-current voltage generated by the power supply board;
- a first connector soldered to the power supply board;
- a second connector soldered to the control board;
- and
- a relay board to which a third connector and a fourth connector are soldered, the third connector being connected to the first connector of the power supply board via a first power line, the fourth connector being connected to the second connector of the control board via a second power line,
- wherein a surface to which the first connector is soldered on the power supply board is opposite to a surface to which the first connector is attached on the power supply board,
- a surface to which the second connector is soldered on the control board is a surface to which the second connector is attached on the control board,
- only surface-mount devices are used as electronic components soldered to the control board, including the second connector,
- the number of pins in the second connector is larger than the number of pins in the first connector,
- the number of pins in the fourth connector is larger than the number of pins in the third connector, and
- the predetermined direct-current voltage generated by the power supply board is supplied to the control board by way of the relay board.
Dependencies are inferred from the claim text.