Image forming apparatus capable of suppressing noise generated when second fixing member changes its position relative to first fixing member through cam member

An image forming apparatus comprising:

• a first fixing member;
• a second fixing member configured to nip and heat a recording sheet in cooperation with the first fixing member to fix a developer image onto the recording sheet;
• a holding member holding the second fixing member such that the second fixing member can be displaced between a pressure contact position and a separation position, the second fixing member in the pressure contact position being in pressure contact with the first fixing member, and the second fixing member in the separation position being positioned away from the first fixing member;
• a cam member rotatable about a rotation axis in a first direction and a second direction opposite to the first direction, the cam member having a cam surface, a distance between the cam surface and the rotation axis being reduced in the second direction;
• an urging member urging the holding member in an urging direction such that the holding member moves toward the cam surface;
• a spring member having one end portion and another end portion, the one end portion being movable in interlocking relation with the cam member, the spring member being configured:
• to store a restoring force by the rotation of the cam member in the first direction and to suppress rotation of the cam member in the first direction;
• and
• to release the restoring force by the rotation of the cam member in the second direction and to facilitate rotation of the cam member in the second direction;
• a drive source configured to generate a drive force for rotating the cam member in the first direction and the second direction;
• a transmission section configured to transmit the drive force to the cam member;
• a regulating member configured to regulate movement of the another end portion;
• and
• a controller configured to control the drive source:
• to provide rotation of the cam member in the first direction, permitting the cam surface to allow the holding member to be displaced in the urging direction to displace the second fixing member to one of the separation position and the pressure contact position;
• and
• to provide rotation of the cam member in the second direction, permitting the cam surface to allow the holding member to be displaced in a direction opposite to the urging direction to displace the second fixing member to remaining one of the separation position and the pressure contact position.