Rolling device

1. A rolling device comprising:

a frame configured for being attached to a device enclosure; and

a rotatable member secured to the frame and rotatable about a first axis relative to the frame;

a shaft member parallel to the first axis;

a roller secured to the rotatable member by the shaft member, and the roller being rotatable about the shaft member; and

an operating member secured to the rotatable member by the shaft member and rotatable about the shaft member, when the operating member is

rotated about the shaft member, the operating member rotates the rotatable member about the first axis.

2. The rolling device of claim 1 , wherein the frame comprises a base sheet; the rotatable member is secured to the base sheet and comprises a base wall and a connecting wall perpendicular to the base wall.

3. The rolling device of claim 2 , wherein the rotatable member is rotatable between a first position, where the connecting wall is parallel to and abuts the base sheet of the frame, and a second position, where the base wall is parallel to and abuts the base sheet.

4. The rolling device of claim 3 , wherein a distance between the second axis and the base sheet of the frame when the rotatable member is in the first position is shorter than when the rotatable member is in the second position.

5. The rolling device of claim 2 , wherein the rotatable member further comprises two parallel sidewalls perpendicular to the base wall and the connecting wall; a block tab is located on one of the sidewalls; and the blocking tab is capable of being pushed by the operating member to rotate the rotatable member.

6. The rolling device of claim 5 , wherein each sidewall of the rotatable member defines a fixing hole; the roller defines a roller hole; a shaft member is secured in the fixing holes and the roller hole so as to secure the roller to the rotatable member between the sidewalls; and the roller is rotatable on the shaft member.

7. The rolling device of claim 5 , wherein two parallel pieces are located on the base sheet of the frame; each piece defines a pivot hole; each sidewall of the rotatable member defines a mounting hole; fixing members are engaged in the mounting holes and the pivot holes to secure the rotatable member to the frame between the pieces.

8. The rolling device of claim 2 , wherein the frame further comprises a side sheet perpendicular to the base sheet; and two securing tabs are located on the side sheet.

9. A rolling device comprising:

a frame configured for being attached to a device enclosure and comprising a base sheet; and

a rotatable member rotatably secured to the base sheet of the frame, the rotatable member comprising a base wall and a connecting wall perpendicular to the base wall;

a roller rotatably secured to the rotatable member; and

an operating member rotatably secured to the rotatable member;

wherein the rotatable member is rotatable between a first position, where the connecting wall is parallel to and abuts the base sheet of the frame, and a second position, where the base wall is parallel to and abuts the base sheet; the rotatable member further comprises two parallel sidewalls that are perpendicular to the base wall and the connecting wall; and a block tab is located on one of the sidewalls, and the block tab is capable of being pushed by the operating member to rotate the rotatable member.

10. The rolling device of claim 9 , wherein the rotatable member is rotatable about a first axis; the roller is rotatable about a second axis; a distance between the second axis and the base sheet of the frame when the rotatable member is in the first position is shorter than when the rotatable member is in the second position.

11. The rolling device of claim 9 , wherein each sidewall of the rotatable member defines a fixing hole; the roller defines a roller hole; a shaft member is secured in the fixing holes and the roller hole so as to secure the roller to the rotatable member between the sidewalls; the roller is rotatable on the shaft member.

12. The rolling device of claim 9 , wherein two parallel pieces are located on the base sheet of the frame; each piece defines a pivot hole; each sidewall of the rotatable member defines a mounting hole; fixing members are engaged in the mounting holes and the pivot holes to secure the rotatable member to the frame between the pieces.

13. The rolling device of claim 9 , wherein the frame further comprises a side sheet perpendicular to the base sheet; two securing tabs are located on the side sheet.