Patent ID: 8561487

Claim:
A testing apparatus comprising: a pushing device comprising a guiding pipe, a driving member moveably attached to the guiding pipe, and an elastic member received in the guiding pipe, the elastic member connected to a first end of the driving member, the first end of the driving member received in the guiding pipe; a clamping device, secured to the driving member; and a support mechanism, the support mechanism comprising a base and a securing member connected to the base; the securing member comprising a first securing plate and a second securing plate; the first securing plate defining a first longitudinal securing hole and the second securing plate defining a second longitudinal securing hole aligned with the first longitudinal securing hole; the second securing plate is attachable to different positions of the first securing plate when the first longitudinal securing hole is aligned with different positions of the second longitudinal securing hole; and the second securing plate securing the guiding pipe; wherein the guiding pipe is adapted to receive air, the driving member is adapted to be driven by air to move along a first direction, and the elastic member is adapted to rebound to pull the driving member to move along a second direction opposite to the first direction; a protrusion protrudes from the guiding pipe, and two retaining portions with threads are located on two opposite sides of the protrusion; the protrusion is placed in the second longitudinal securing hole; two nuts are engaged with the two retaining portions to secure the guiding pipe to the second securing plate; and the second securing plate is located between the two nuts.