Tray assembly and electronic device having the same

1. A tray assembly, detachably disposed on a casing, comprising:

a tray body, configure to be accommodated in the casing;

at least one gear set, disposed at a side of the tray body, wherein the at least one gear set has a first engagement portion configured to be engaged with the casing;

a handle, pivotally connected to the tray body via the at least one gear set; and

at least one side cover, fixed to the tray body and covering the at least one gear set;

wherein the at least one side cover has at least one guide hole recessed inwardly from an edge of the at least one side cover and configured for guiding one of at least one guide pin of the casing to engage with the first engagement portion.

2. The tray assembly according to claim 1 , wherein the handle has a lying position and a standing position; when the handle is in the lying position, the first engagement portion of the at least one gear set is engaged with one of the at least one guide pin of the casing; when the handle is pivoted to the standing position from the lying position, the first engagement portion is disengaged from the at least one guide pin of the casing.

3. The tray assembly according to claim 1 , wherein the at least one side cover protrudes further from a bottom surface of the tray than the at least one gear set.

4. The tray assembly according to claim 2 , wherein the at least one gear set comprises a first gear member and a second gear member that are meshed with each other and pivotally connected to the tray body, the handle is connected to the tray body and movable with the first gear member via the second gear member, the first gear member has the first engagement portion; when the handle is pivoted to the lying position from the standing position, the handle rotates the first gear member via the second gear member so as to engage one of the at least one guide pin of the casing with the first engagement portion, thereby fixing the tray body to the casing.

5. The tray assembly according to claim 4 , wherein the first gear member has a flat portion, the second gear member comprises a gear portion and an extension arm portion extending outward from the gear portion, the second gear member is meshed with the first gear member via the gear portion, the handle is connected to the gear portion via the extension arm portion; when the handle is in the lying position, the extension arm portion is located adjacent to the flat portion.

6. The tray assembly according to claim 4 , wherein the at least one gear set further comprises a third gear member and a fourth gear member that are meshed with each other and pivotally connected to the tray body, the first gear member and the third gear member are respectively meshed with two opposite sides of the second gear member, the second gear member and the fourth gear member are respectively meshed with two opposite sides of the third gear member, the fourth gear member has a second engagement portion; when the handle is pivoted to the lying position from the standing position, the handle rotates the fourth gear member via the second gear member and the third gear member so as to engage another one of the at least one guide pin of the casing with the second engagement portion, thereby fixing the tray body to the casing.

7. The tray assembly according to claim 6 , wherein the at least one guide hole comprises two guide holes, respectively configured for guiding the at least one guide pin to engage with the first engagement portion and the second engagement portion.

8. The tray assembly according to claim 1 , wherein the at least one gear set comprises two gear sets respectively disposed at two opposite sides of the tray body, and two opposite ends of the handle are connected to the tray body respectively via the two gear sets.

9. The tray assembly according to claim 2 , wherein the tray body has at least one elastic stopper protruding therefrom and configured to prevent the handle from leaving the standing position.

10. An electronic device, comprising:

a casing having at least one guide pin; and

a tray assembly, comprising:

a tray body;

at least one gear set, disposed at a side of the tray body, wherein the at least one gear set has a first engagement portion;

a handle, pivotally connected to the tray body via the at least one gear set; and

at least one side cover, fixed to the tray body and covering the at least one gear set;

wherein, the first engagement portion of the gear set is configured to be engaged with the at least one guide pin of the casing so that the tray assembly is detachably disposed on the casing;

wherein the at least one side cover has at least one guide hole recessed inwardly from an edge of the at least one side cover and configured for guiding one of the at least one guide pin of the casing to engage with the first engagement portion.

11. The electronic device according to claim 10 , wherein the handle has a lying position and a standing position; when the handle is in the lying position, the first engagement portion of the at least one gear set is engaged with the at least one guide pin of the casing; when the handle is pivoted to the standing position from the lying position, the handle rotates the at least one gear set so as to disengage the first engagement portion from the at least one guide pin of the casing.

12. The electronic device according to claim 10 , wherein the at least one side cover protrudes further from a bottom surface of the tray than the at least one gear set.

13. The electronic device according to claim 11 , wherein the at least one gear set comprises a first gear member and a second gear member that are meshed with each other and pivotally connected to the tray body, the handle is connected to the tray body and movable with the first gear member via the second gear member, the first gear member has the first engagement portion; when the handle is pivoted to the standing position from the lying position, the handle rotates the first gear member via the second gear member so as to engage one of the at least one guide pin of the casing with the first engagement portion, thereby fixing the tray body to the casing.

14. The electronic device according to claim 13 , wherein the first gear member has a flat portion, the second gear member comprises a gear portion and an extension arm portion extending outward from the gear portion, the second gear member is meshed with the first gear member via the gear portion, the handle is connected to the gear portion via the extension arm portion; when the handle is in the lying position, the extension arm portion is located adjacent to the flat portion.

15. The electronic device according to claim 13 , the at least one gear set further comprises a third gear member and a fourth gear member that are meshed with each other and pivotally connected to the tray body, the first gear member and the third gear member are respectively meshed with two opposite sides of the second gear member, the second gear member and the fourth gear member are respectively meshed with two opposite sides of the third gear member, the fourth gear member has a second engagement portion; when the handle is pivoted to the lying position from the standing position, the handle rotates the fourth gear member via the second gear member and the third gear member so as to engage another one of the at least one guide pin of the casing with the second engagement portion, thereby fixing the tray body to the casing.

16. The electronic device according to claim 15 , wherein the at least one guide hole comprises at least two guide holes, respectively configured for guiding the at least one guide pin to engage with the first engagement portion and the second engagement portion.

17. The electronic device according to claim 11 , wherein the tray body has at least one elastic stopper protruding therefrom and configured to prevent the handle from leaving the standing position.

18. The electronic device according to claim 14 , wherein the extension arm portion has a first retaining structure, the tray body has a second retaining structure, one of the first retaining structure and the second retaining structure is a protrusion, another one of the first retaining structure and the second retaining structure is a hole mating the protrusion; when the handle is in the lying position, the first retaining structure is engaged with the second retaining structure.

19. A tray assembly, comprising:

a tray body;

at least one gear set, disposed at a side of the tray body, wherein the at least one gear set comprises a first gear member and a second gear member that are meshed with each other and pivotally connected to the tray body, and the first gear member has a first engagement portion configured to be engaged with a casing;

a handle, rotatably connected to the tray body via the second gear member of the at least one gear set and movable with the first gear member; and

at least one side cover, fixed to the tray body and covering the at least one gear set;

wherein the at least one side cover has at least one guide hole recessed inwardly from an edge of the at least one side cover and configured for guiding one of at least one guide pin of the casing to engage with the first engagement portion.