Clamp mechanism

A clamp mechanism clamping an electronic device and joining an object to the electronic device, comprising

• a first clamping element having a first joining portion;
• a second clamping element having a second joining portion slidably joined to the first joining portion in a joint position to adjust the second clamping element apart from the first clamping element to a clamp distance;
• a latching element comprising a connecting body rotatably connected to the first joining portion and a latch connected to the connecting body, and inserted into the joint position to maintain the first clamping element apart from the second clamping element at the clamp distance;
• and
• a connecting element joined to the second clamping element and connected to the object, whereby the object is joined to the electronic device, wherein the first joining portion comprises two arms having a protrusion on one side and a notch on another side, and the second joining portion comprises a groove having a plurality of concave portions on lateral walls thereof, wherein when the arms slide in the groove, the protrusion engages one of the concave portions and the latching element is inserted into the notch to fix the protrusion in the concave portions whereby the first joining portion is fixed to the second joining portion to maintain the clamp distance, and when the connecting body is parallel to the first joining portion, the latch is inserted into the notch to fix the protrusion in the concave portion.