Image forming apparatus and sheet feeding device

1. An image forming apparatus comprising:

a recording-medium storing unit including a rotating member wherein the rotating member is attached to a bottom of a projection portion of the recording medium storing unit, the recording-medium storing unit being capable of being pulled out from an apparatus body;

a support surface having an edge portion, the support surface supporting the rotating member when the recording-medium storing unit is pulled out from the apparatus body;

an image forming unit that forms an image on a recording medium fed from the recording-medium storing unit; and

a regulating portion that comes into contact with the support surface and regulates the movement of the rotating member in a certain direction when the rotating member drops off the support surface,

wherein the regulating portion is provided on the rotating member and has a notch for receiving a shaft of the rotating member,

wherein the rotating member has a counter surface that faces the edge portion of the support surface when the rotating member moves beyond the edge portion and drops off the support surface in the certain direction, and

wherein, in the state in which the counter surface faces the edge portion, the counter surface is inclined such that a point on the counter surface approaches the edge-portion side as the point moves in a direction opposite to the certain direction.

2. The image forming apparatus according to claim 1 ,

wherein the recording-medium storing unit is substantially box-shaped, and

wherein the support surface is provided in an area that is opposed to a side surface of the substantially box-shaped recording-medium storing unit.

3. The image forming apparatus according to claim 1 ,

wherein the recording-medium storing unit includes

a substantially box-shaped portion that is substantially box-shaped and has a plurality of side surfaces, the substantially box-shaped portion storing the recording medium, and

the projecting portion projects from one of the side surfaces that is positioned at a back side of the apparatus body.

4. The image forming apparatus according to claim 2 ,

wherein the recording-medium storing unit includes

a substantially box-shaped portion that is substantially box-shaped and has a plurality of side surfaces, the substantially box-shaped portion storing the recording medium, and

the projecting portion projects from one of the side surfaces that is positioned at a back side of the apparatus body.

5. The image forming apparatus according to claim 1 ,

wherein the thickness of the rotating member gradually decreases from an axial center of the rotating member toward a peripheral surface of the rotating member.

6. A sheet feeding device comprising:

a sheet storing unit including a rotating member wherein the rotating member is attached to a bottom of a projection portion of the recording medium storing unit, the recording-medium storing unit being capable of being pulled out from an apparatus body;

a support surface having an edge portion, the support surface supporting the rotating member when the recording-medium storing unit is pulled out from the apparatus body; and

a regulating portion that comes into contact with the support surface and regulates the movement of the rotating member in a certain direction when the rotating member drops off the support surface,

wherein the regulating portion is provided on the rotating member and has a notch for receiving a shaft of the rotating member,

wherein the rotating member has a counter surface that faces the edge portion of the support surface when the rotating member moves beyond the edge portion and drops off the support surface in a downward direction, and

wherein, in the state in which the counter surface faces the edge portion, the counter surface is inclined such that a point on the counter surface approaches the edge-portion side as the point moves upward.

7. The sheet feeding device according to claim 6 , further comprising:

a sending-out member that is in contact with the topmost one of sheets stored in the sheet storing unit and sends out the topmost sheet, and

wherein a part of the sending-out member that is in contact with the topmost sheet is positioned below an upper edge of the sheet storing unit that is substantially box-shaped.

8. The sheet feeding device according to claim 6 ,

wherein the sheet storing unit is substantially box-shaped, and

wherein the support surface is provided in an area that is opposed to a side surface of the substantially box-shaped sheet storing unit, and is positioned above a bottom surface of the sheet storing unit.

9. The sheet feeding device according to claim 7 ,

wherein the sheet storing unit is substantially box-shaped, and

wherein the support surface is provided in an area that is opposed to a side surface of the substantially box-shaped sheet storing unit, and is positioned above a bottom surface of the sheet storing unit.

10. The sheet feeding device according to claim 6 ,

wherein the thickness of the rotating member gradually decreases from an axial center of the rotating member toward a peripheral surface of the rotating member.