Circuit board and image forming apparatus
A circuit board for an image forming apparatuses to which a first integrated circuit or a second integrated circuit is provided, includes an electric part provided to a first surface of the circuit board, a first attachment part provided to the first surface, to which at least one terminal of the first integrated circuit is attachable, a first conductor pattern formed on the first surface and configured to constitute at least a portion of a first wiring which connects the first attachment part and the electric part, a second attachment part provided to a second surface opposite to the first surface of the circuit board, to which at least one terminal of the second integrated circuit is attachable.
1. A circuit board for an image forming apparatuses to which a first integrated circuit or a second integrated circuit is provided, comprising:
an electric part provided to a first surface of the circuit board;
a first attachment part provided to the first surface, to which at least one terminal of the first integrated circuit is attachable;
a first conductor pattern formed on the first surface and configured to constitute at least a portion of a first wiring which connects the first attachment part and the electric part;
a second attachment part provided to a second surface opposite to the first surface of the circuit board, to which at least one terminal of the second integrated circuit is attachable;
a second conductor pattern formed on the second surface and configured to constitute at least a first portion of a second wiring which connects the second attachment part and the electric part; and
a connecting via penetrating through the circuit board, extending from the first conductor pattern to the second conductor pattern, and configured to constitute a second portion of the second wiring.
2. The circuit board according to claim 1 , wherein the connecting via is electrically connected to the first conductor pattern.
3. The circuit board according to claim 1 ,
wherein the circuit board further includes an input portion to which a voltage is input,
wherein each of the first integrated circuit and the second integrated circuit is configured to convert a value of the voltage input from the input portion.
4. The circuit board according to claim 1 , wherein each of the first integrated circuit and the second integrated circuit is configured to control a drive source that is electrically connected to the circuit board.
5. The circuit board according to claim 1 , wherein an arrangement of at least one terminal of the first attachment part which corresponds to the at least one terminal of the first integrated circuit is different from an arrangement of at least one terminal of the second attachment part which corresponds to the at least one terminal of the second integrated circuit.
6. The circuit board according to claim 1 , wherein a number of the at least one terminal of the first attachment part which corresponds to the at least one terminal of the first integrated circuit is different from a number of the at least one terminal of the second attachment part which corresponds to the at least one terminal of the second integrated circuit.
7. The circuit board according to claim 1 , further comprising;
a first area where the first integrated circuit is arranged on the first surface; and
a second area where the second integrated circuit is arranged on the second surface,
wherein, in a case where the first area is projected onto the second surface in a direction perpendicular to the first surface, a projection of the first area at least partially overlaps with the second area.
8. An image forming apparatus comprising;
a voltage conversion unit, having a circuit board to which a first integrated circuit or a second integrated circuit is provided, configured to convert a value of a voltage input to the circuit board; and,
a control unit configured to control the image forming apparatus based on the voltage converted by the voltage conversion unit,
wherein the circuit board comprises:
an electric part provided to a first surface of the circuit board;
a first attachment part provided to the first surface, to which at least one terminal of the first integrated circuit is attachable;
a first conductor pattern formed on the first surface and configured to constitute at least a portion of a first wiring which connects the first attachment part and the electric part;
a second attachment part provided to a second surface opposite to the first surface of the circuit board, to which at least one terminal of the second integrated circuit is attachable;
a second conductor pattern formed on the second surface and configured to constitute at least a first portion of a second wiring which connects the second attachment part and the electric part; and
a connecting via configured to penetrate through the circuit board, extending from the first conductor pattern to the second conductor pattern, and to constitute a second portion of the second wiring.
9. The image forming apparatus according to claim 8 , wherein the connecting via is electrically connected to the first conductor pattern.
10. The image forming apparatus according to claim 8 , wherein an arrangement of at least one terminal of the first attachment part which corresponds to the at least one terminal of the first integrated circuit is different from an arrangement of at least one terminal of the second attachment part which corresponds to the at least one terminal of the second integrated circuit.
11. The image forming apparatus according to claim 8 , wherein a number of the at least one terminal of the first attachment part which corresponds to the at least one terminal of the first integrated circuit is different from a number of the at least one terminal of the second attachment part which corresponds to the at least one terminal of the second integrated circuit.
12. The image forming apparatus according to claim 8 ,
wherein the circuit board includes a first area where the first integrated circuit is arranged on the first surface, and a second area where the second integrated circuit is arranged on the second surface, and
wherein, in a case where the first area is projected onto the second surface in a direction perpendicular to the first surface, a projection of the first area at least partially overlaps with the second area.
13. An image forming apparatus comprising:
a rotation member configured to rotate to form an image on a sheet,
a drive source, and
a circuit board to which a first integrated circuit or a second integrated circuit is provided,
wherein the circuit board comprises:
an electric part provided to a first surface of the circuit board;
a first attachment part provided to the first surface, to which at least one terminal of the first integrated circuit is attachable;
a first conductor pattern formed on the first surface and configured to constitute at least a portion of a first wiring which connects the first attachment part and the electric part;
a second attachment part provided to a second surface opposite to the first surface of the circuit board, to which at least one terminal of the second integrated circuit is attachable;
a second conductor pattern formed on the second surface and configured to constitute at least a first portion of a second wiring which connects the second attachment part and the electric part; and
a connection via configured to penetrate through the circuit board extending from the first conductor pattern to the second conductor pattern, and to constitute a second portion of the second wiring.
14. The image forming apparatus according to claim 13 , wherein the connecting via is electrically connected to the first conductor pattern.
15. The image forming apparatus according to claim 13 , wherein an arrangement of at least one terminal of the first attachment part which corresponds to the at least one terminal of the first integrated circuit is different from an arrangement of at least one terminal of the second attachment part which corresponds to the at least one terminal of the second integrated circuit.
16. The image forming apparatus according to claim 13 , wherein a number of the at least one terminal of the first attachment part which corresponds to the at least one terminal of the first integrated circuit is different from a number of the at least one terminal of the second attachment part which corresponds to the at least one terminal of the second integrated circuit.
17. The image forming apparatus according to claim 13 ,
wherein the circuit board includes a first area where the first integrated circuit is arranged on the first surface, and a second area where the second integrated circuit is arranged on the second surface,
wherein, in a case where the first area is projected onto the second surface in a direction perpendicular to the first surface, a projection of the first area at least partially overlaps with the second area.