Toy top

1. A toy top comprising:

a shaft portion; and

a body including a main component which is rotatable relative to the shaft portion in response to an impact applied to the main component,

wherein the body has

a first body part which constitutes the main component,

a second body part which is rotatable relative to the main component,

first spaced extensions that extend radially outward from a circumference of the first body part, and

second spaced extensions that extend radially outward from a circumference of the second body part,

wherein each of the first extensions is large enough to cover each of the second extensions in plan view,

wherein the second extensions stepwise vary their positions relative to the first extensions when the main component rotates relative to the shaft portion, and

wherein the first body part rotates relative to the second body part to switch between:

a first state in which the first extensions respectively cover the second extensions in plan view; and

a second state in which the second extensions respectively appear in the spaces between the first extensions in plan view.

2. The toy top according to claim 1 , wherein the second body part vertically overlaps with the first body part and rotates together with the shaft portion.

3. The toy top according to claim 2 , wherein the second body part engages with the shaft portion through an intermediary flywheel rotatable together with the shaft portion.

4. The toy top according to claim 1 , wherein

the shaft portion is coupled with the body when the main component rotates in a first direction relative to the shaft portion, and

the shaft portion is decoupled from the body when the main component rotates in a second direction relative to the shaft portion.

5. A toy top comprising:

a shaft portion;

a first body part which is rotatable relative to the shaft portion in response to an impact applied to the first body part;

a second body part which is rotatable relative to the first body part;

first extensions that extend radially outward from the first body part,

wherein the first extensions are separated from each other by first spaces; and

second extensions that extend radially outward from the second body part,

wherein the second extensions are separated from each other by second spaces,

wherein each of the first extensions is large enough to cover each of the second extensions in plan view, and

wherein the second body part rotates relative to the first body part, to switch between:

a first state in which the first extensions respectively cover the second extensions in plan view; and

a second state in which the second extensions respectively cover the first spaces in plan view.

6. The toy top according to claim 5 , wherein the second body part rotates together with the shaft portion.

7. The toy top according to claim 6 , wherein the second body part engages the shaft portion through an intermediary flywheel rotatable together with the shaft portion.

8. The toy top according to claim 7 , wherein the first body part is a top plate spaced from a bottom plate, in between which the second body part rotates.

9. The toy top according to claim 8 ,

wherein the top plate includes a plurality of slits and the flywheel includes a corresponding number of projections,

wherein the projections are movably received within the slits, respectively.

10. The toy top according to claim 5 , wherein

the shaft portion is coupled with the first body part when the first body part is rotated in a first direction relative to the shaft portion, and

the shaft portion is decoupled from the first body part when the first body part is rotated in a second direction relative to the shaft portion.

11. The toy top according to claim 5 , wherein the number of each of the first and second extensions is six.

12. The toy top according to claim 5 , wherein the first extensions are equally spaced from each other by a first distance and the second extensions are equally spaced from each other by the first distance.

13. The toy top according to claim 5 , wherein the first extensions are spaced from each other at different intervals, and the second extensions are spaced from each other at the different intervals.

14. The toy top according to claim 5 , wherein an area of each of the first extensions is greater than an area of each of the second extensions.

15. The toy top according to claim 5 , wherein an area of each of the first extensions is the same as an area of each of the second extensions.

16. The toy top according to claim 5 , wherein an area of each of the second extensions is larger than an area of each of the first spaces between the first extensions.

17. The toy top according to claim 5 , wherein when the second extensions move into the first spaces between the first extensions, an outer perimeter of the toy top is substantially circular.

18. The toy top according to claim 5 , wherein the first and second extensions extend equally from the respective first and second body parts an equal distance.

19. The toy top according to claim 5 , wherein the second extensions stepwise vary their positions when one of ridges and undulations formed on the second body part are moved relative to the other of ridges and undulations formed on the support shaft.

20. A toy top having an axis of rotation and comprising:

a shaft portion;

a first body part which is rotatable relative to the shaft portion in response to an impact applied to the first body part,

a second body part which is rotatable relative to the first body part;

a first extension that extends radially outward from the first body part,

a second extension that extends radially outward from the second body part, below the first extension relative to the axis,

wherein, the second extension rotates relative to the axis between a first position that is radially the same as the first extension and a second position that is radially spaced from the first extension,

wherein the second body part rotates with the shaft portion,

wherein the first body part is a top plate spaced from a bottom plate, in between which the second body part rotates, and

wherein the second body part engages with the shaft portion through a flywheel rotatable with the shaft portion.