Clamping device for protection casing of electronic device

1. A clamping device for a protection casing of an electronic device; the clamping device serving to clamp a protection casing for receiving an electronic device; wherein the protection casing includes an upper cover for covering an upper side of the electronic device and a lower cover for covering a lower side of the electronic device; and in assembly state, the upper cover is connected to the lower cover and thus the electronic device is enclosed therein; the clamping device comprising:

an upper clamping frame for clamping the protection casing at an upper side thereof;

a lower clamping frame for clamping the protection casing at a lower side thereof; and

a combining structure arranged on lateral sides of the upper clamping frame and the lower clamping frame; the combining structure serving to combine the upper clamping frame and the lower clamping frame so that the upper clamping frame and the lower clamping frame clamp the protection casing tightly and thus the protection casing retains its function for a long time;

wherein the combining structure includes at least one connection unit for connecting the upper clamping frame with the lower clamping frame;

and at least one side of each of the upper clamping frame and the lower clamping frame is arranged with the connection unit;

wherein the at least one connection unit includes a plurality of upper connecting sheets connecting to the upper clamping frame, and a plurality of lower connecting sheets connecting to the lower clamping frame; each of the upper connecting sheets and the upper clamping frame are formed as an integral structure; each of the lower connecting sheets and the lower clamping frame are formed as an integral structure; each of the lower connecting sheets has positioned to a position corresponding to that of each of the upper connecting sheets; and

wherein the upper connecting sheets include two upper lateral connecting sheets and an upper rear connecting sheet; and the lower connecting sheets include two lower lateral connecting sheets and a lower rear connecting sheet.

2. The clamping device for a protection casing of an electronic device as claimed in claim 1 , wherein the upper clamping frame is a hollow rectangular frame; the lower clamping frame is a hollow protection casing; and the lower clamping frame has a shape corresponding to that of the upper clamping frame.

3. The clamping device for a protection casing of an electronic device as claimed in claim 1 , wherein the upper connecting sheets further include two upper front connecting sheets; and the lower connecting sheets further include two lower front connecting sheets.

4. The clamping device for a protection casing of an electronic device as claimed in claim 1 , wherein each of the upper connecting sheets is screwed into a respective one of the lower connecting sheets to cause that the upper clamping frame is connected to the lower clamping frame; each of the upper connecting sheets and the lower connecting sheets has screw holes so that screws are used to connect each of the upper connecting sheets and each of the lower connecting sheets by screwing to the screw holes.

5. The clamping device for a protection casing of an electronic device as claimed in claim 4 , wherein in screwing, screws are used screw other objects to the at least one connection unit.

6. A clamping device for a protection casing of an electronic device; the clamping device serving to clamp a protection casing for receiving an electronic device; wherein the protection casing includes an upper cover for covering an upper side of the electronic device and a lower cover for covering a lower side of the electronic device; and in assembly state, the upper cover is connected to the lower cover and thus the electronic device is enclosed therein; the clamping device comprising:

an upper clamping frame for clamping the protection casing at an upper side thereof;

a lower clamping frame for clamping the protection casing at a lower side thereof; and

a combining structure arranged on lateral sides of the upper clamping frame and the lower clamping frame; the combining structure serving to combine the upper clamping frame and the lower clamping frame so that the upper clamping frame and the lower clamping frame clamp the protection casing tightly and thus the protection casing retains its function for a long time;

wherein the combining structure includes at least one connection unit for connecting the upper clamping frame with the lower clamping frame; and at least one side of each of the upper clamping frame and the lower clamping frame is arranged with the connection unit;

wherein the at least one connection unit includes a plurality of upper connecting sheets connecting to the upper clamping frame, and a plurality of lower connecting sheets connecting to the lower clamping frame; each of the upper connecting sheets and the upper clamping frame are formed as an integral structure; each of the lower connecting sheets and the lower clamping frame are formed as an integral structure; each of the lower connecting sheets has positioned to a position corresponding to that of each of the upper connecting sheets; each upper connecting sheet includes two upper sub-sheets; the two upper sub-sheets form an L shape; each lower connecting sheet includes two lower sub-sheets; the two lower sub-sheets form an L shape; and

wherein the upper connecting sheets include two upper lateral connecting sheets and an upper rear connecting sheet; the lower connecting sheets include two lower lateral connecting sheets and a lower rear connecting sheet.

7. The clamping device for a protection casing of an electronic device as claimed in claim 6 , wherein the upper connecting sheets further include two upper front connecting sheets; and the lower connecting sheets further include two lower front connecting sheets.

8. The clamping device for a protection casing of an electronic device as claimed in claim 6 , wherein each of the upper connecting sheets is screwed into a respective one of the lower connecting sheets to cause that the upper clamping frame is connected to the lower clamping frame; a lateral side of one of the upper sub-sheets is connected to the upper clamping frame and a lateral side of one of the lower sub-sheets is connected to the lower clamping frame; and the other one of the upper sub-sheets and the other one of the upper sub-sheets have a plurality of screw holes so that screws are used to connect each of the upper connecting sheets and each of the lower connecting sheets by screwing to the screw holes.

9. The clamping device for a protection casing of an electronic device as claimed in claim 8 , wherein in screwing, screws are used screw other objects to the at least one connection unit.