Mounting device for mounting electronic product on supporting rack

1. A mounting device configured to mount an electronic product on a supporting rack, the mounting device comprising:

a holding rack comprising:

a holding plate configured to engage a first edge of the supporting rack, and configured to hold the electronic product; and

an extension plate connected to the holding plate, and comprising a first position hole and a second position hole;

an engaging element pivoted to the holding plate; and

a lock mechanism disposed on the engaging element, and the locking mechanism being selectively insertable into the first position hole and the second position hole;

wherein when the electronic product is mounted on the supporting rack, the lock mechanism is inserted into the first position hole, the holding plate is engaged with the first edge, and the engaging element is engaged with a second edge of the supporting rack.

2. The mounting device as claimed in claim 1 , wherein the holding plate further comprises:

a body portion comprising a front surface and a rear surface, wherein the electronic product is configured to affix to the front surface;

a hook portion connected to the rear surface, and configured to engage the first edge; and

a protrusion portion connected to the rear surface,

wherein each of the protrusion portion and the engaging element extends perpendicular to the body portion, and the engaging element is pivoted on the protrusion portion.

3. The mounting device as claimed in claim 2 , wherein the extension plate is connected to the front surface, and extends perpendicular to the body portion.

4. The mounting device as claimed in claim 2 , wherein the protrusion portion and the extension plate extend in a same plane.

5. The mounting device as claimed in claim 2 , wherein the body portion is an elongated plate, wherein when the electronic product is mounted on the supporting rack, the body portion and the supporting rack extend in a same direction.

6. The mounting device as claimed in claim 1 , wherein the engaging element is rotated about a central axis relative to the holding plate, and a distance between the first position hole and the central axis is equal to a distance between the second position hole and the central axis.

7. The mounting device as claimed in claim 1 , wherein the engaging element comprises a hook and a through hole, the hook is configured to engage the second edge, wherein when the electronic product is mounted on the supporting rack, the lock mechanism extends through the through hole,

wherein the engaging element is an elongated plate, the hook and the through hole are respectively at two ends of the engaging element.

8. The mounting device as claimed in claim 1 , wherein the lock mechanism comprises:

a base affixed to the engaging element; and

a latch movably disposed in the base, and the latching being selectively insertable into the first position hole and the second position hole;

wherein when the latch is inserted into the first position hole or the second position hole, the latch extends through the engaging element.

9. The mounting device as claimed in claim 8 , wherein the lock mechanism further comprises:

a shaft connected to the latch; and

a handle rotatably connected to the shaft,

wherein when the handle is rotated, the latch is moved relatively to the base.

10. The mounting device as claimed in claim 8 , wherein each of the base and the latch extends perpendicular to the engaging element, and the base is a tube.