Sheet feeding device and image forming apparatus incorporating the same

A sheet feeding device comprising:

• a body;
• a sheet tray insertable to and removable from the body to store a sheet, the sheet tray including a contacted portion;
• a conveyance roller pair in the body to convey the sheet stored in the sheet tray to a conveyance passage in the body, the conveyance roller pair including one roller and another roller;
• and
• a contact-separation mechanism to contact or separate said another roller to and from the one roller, the contact-separation mechanism including:
• a spring;
• and
• a movable part pushed in a first direction by the spring, the movable part having:
• a contact portion contactable with the contacted portion of the sheet tray in response to an insertion of the sheet tray into the body to move the movable part in a second direction opposite to the first direction against the spring;
• and
• an elongated guide to change a position of said another roller in a third direction orthogonal to the first direction and the second direction with respect to the one roller according to a movement of the movable part in the first direction or the second direction.