Mounting apparatus for expansion cards, casing, and electronic device using the same

1. A mounting apparatus for mounting an end of an expansion card to a chassis, comprising:

a locking bracket comprising:

a locking portion configured to lock the end of the expansion card; and

a fixing portion comprising a fixing plate;

a rotating member;

a fixing member connected to the locking bracket; and

a screw movably mounted to an end of the fixing portion;

wherein the locking bracket is rotatably connected to the chassis by the rotating member, and the locking portion is rotatable between a locking position, where the locking portion latches the end of expansion card and the fixing portion is fixed to the chassis by the fixing member, and an unlocking position, where the fixing member releases the fixing portion and the locking portion separates from the end of expansion card;

wherein the fixing portion is fixed to the chassis by the fixing member and the fixing plate; and

wherein a screw hole defined on the chassis; the fixing plate defines a third through hole corresponding to the screw hole; the screw passes through the third through hole and connects to the screw hole to fix the fixing portion to the chassis.

2. The mounting apparatus of claim 1 , wherein the locking portion comprises:

a locking plate; and

two first base plates perpendicularly connected to a side of the locking plate, wherein the two first base plates are adjacent to each other;

wherein each of the two first base plates define a first through hole corresponding to the rotating member, the locking bracket is rotatably connected to the chassis by the rotating member and the first through holes.

3. The mounting apparatus of claim 2 , wherein the mounting apparatus further comprises an extending portion defined on the chassis and corresponding to the locking portion, the extending portion comprises two second base plates that are parallel and adjacent to each other;

wherein the locking bracket is rotatably connected to the two second base plates by the rotating member and the first through holes.

4. The mounting apparatus of claim 3 , wherein each of the two second base plates define a second through hole corresponding to the rotating member;

each of the two second base plates is aligned to one of the two first base plates, the rotating member passes through the first through holes and the second through holes and the locking bracket is rotatably connected to the chassis through the two first base plates, the two second base plates and the rotating member.

5. The mounting apparatus of claim 3 , wherein the chassis comprises a back plate, the second base plate is perpendicularly connected to the back plate.

6. A casing comprising:

a chassis; and

a mounting apparatus for mounting an end of an expansion card to the chassis, comprising:

locking bracket comprising:

a locking portion configured to lock the end of the expansion card; and

a fixing portion comprising a fixing plate;

an rotating member;

a fixing member connected to the locking bracket; and

a screw movably mounted to an end of the fixing portion;

wherein the locking bracket is rotatably connected to the chassis by the rotating member, and the locking portion is rotatable between a locking position, where the locking portion latches the end of expansion card and the fixing portion is fixed to the chassis by the fixing member, and an unlocking position, where the fixing member releases the fixing portion and the locking portion separates with the end of expansion card;

wherein the fixing portion is fixed to the chassis by the fixing member and the fixing plate; and

wherein a screw hole defined on the chassis; the fixing plate defines a third through hole corresponding to the screw hole; the screw passes through the third through hole and connects to the screw hole to fix the fixing portion to the chassis.

7. The casing of claim 6 , wherein the locking portion comprises:

a locking plate; and

two first base plates perpendicularly connected to a side of the locking plate, wherein the two first base plates are adjacent to each other;

wherein each of the two first base plates defines a first through hole corresponding to the rotating member, the locking bracket is rotatably connected to the chassis by the rotating member and the first through holes.

8. The casing of claim 7 , wherein the mounting apparatus further comprises an extending portion defined on the chassis and corresponding to the locking portion, the extending portion comprises two second base plates parallel and adjacent to each other;

wherein the locking bracket is rotatably connected to the two second base plates by the rotating member and the first through holes.

9. The casing of claim 8 , wherein each of the two second base plates define a second through hole corresponding to the rotating member;

each of the two second base plates is aligned to one of the two first base plates, the rotating member passes through the first through holes and the second through holes and the locking bracket is rotatably connected to the chassis through the two first base plates, the two second base plates and the rotating member.

10. The mounting apparatus of claim 8 , wherein the chassis comprises a back plate, the second base plate is perpendicularly connected to the back plate.

11. An electronic device comprising:

an expansion card; and

a casing comprising:

a chassis; and

a mounting apparatus for mounting an end of the expansion card to the chassis, comprising:

locking bracket comprising:

a locking portion configured to lock the end of the expansion card; and

a fixing portion comprising a fixing plate;

a rotating member;

a fixing member connected to the locking bracket; and

a screw movably mounted to an end of the fixing portion;

wherein the locking bracket is rotatably connected to the chassis by the rotating member, and the locking portion is rotatable between a locking position, where the locking portion latches the end of expansion card and the fixing portion is fixed to the chassis by the fixing member, and an unlocking position, where the fixing member releases the fixing portion and the locking portion separates with the end of expansion card;

wherein the fixing portion is fixed to the chassis by the fixing member and the fixing plate; and

wherein a screw hole defined on the chassis; the fixing plate defines a third through hole corresponding to the screw hole; the screw passes through the third through hole and connects to the screw hole to fix the fixing portion to the chassis.

12. The electronic device of claim 11 , wherein the locking portion comprises:

a locking plate; and

two first base plates perpendicularly connected to a side of the locking plate, wherein the two first base plates are adjacent to each other;

wherein each of the two first base plates defines a first through hole corresponding to the rotating member, the locking bracket is rotatably connected to the chassis by the rotating member and the first through holes.

13. The electronic device of claim 12 , wherein the mounting apparatus further comprises an extending portion defined on the chassis and corresponding to the locking portion, the extending portion comprises two second base plates parallel and adjacent to each other;

wherein the locking bracket is rotatably connected to the two second base plates by the rotating member and the first through holes.

14. The electronic device of claim 13 , wherein each of the two second base plates defines a second through hole corresponding to the rotating member;

each of the two second base plates is aligned to one of the two first base plates, the rotating member passes through the first through holes and the second through holes and the locking bracket is rotatably connected to the chassis by the two first base plates, the two second base plates and the rotating member.