Patent ID: 7752771

Claim:
A depth checking device for checking whether a depth of a fixing hole is less than a designed depth of the fixing hole, the depth checking device comprising: a body member defining a stepped through hole and forming a stopping surface inside the stepped through hole; a hollow pressing member comprising a first end and an opposite second end, the first end comprising a first end surface, a first opening defined on the first end surface, a second opening defined on the second end, the body member received in the second opening, the first opening, the second opening and the stepped through hole being in communication with each other; a checking member moveably mounted in the stepped through hole, the checking member comprising an indication end adjacent to the first end and an opposite probe end, the indication end including a second end surface; and an adjustment nut screwed on the checking member and supported by the stopping surface in a position where the first end surface is coplanar with the second end surface and the probe end protruding from the body member with a protruding length of the probe end same as the designed depth of the fixing hole.