Patent ID: 8857253

Claim:
A measuring device for measuring adhesive strength of two-sided adhesive pieces, the measuring device comprising: a frame comprising a rack, and a pull member slidably mounted on the rack along a first direction; a supporting apparatus comprising a base fixed to the rack and a supporting assembly slidably installed on the base along a second direction perpendicular to the first direction; and a positioning apparatus comprising a supporting plate slidably installed on the supporting assembly along a third direction perpendicular to the first and second directions, and a plurality of pulling blocks, wherein each adhesive piece is adhered between the supporting plate and a corresponding one of the pulling blocks, each pulling block is operable to be connected to the pull member to be pulled along the first direction to disengage from the supporting plate, thus to measure the adhesive strength of the adhesive piece, and wherein the frame further comprises a bottom wall, the rack is substantially U-shaped and secured on the bottom wall, a beam being slidably mounted to the rack along the first direction, the pull member is fixed to the beam, wherein the base is fixed on the bottom wall, the base defines a slide slot along the second direction, the supporting assembly comprises a rail slidably received in the slide slot, wherein the supporting assembly comprises a supporting portion, a first guiding bar fixed on a first end of the supporting portion, and a second guiding bar fixed on a second end of the supporting portion opposite to the first guiding bar, the rail is fixed to a bottom of the supporting portion, the supporting portion, the first bar, and the second bar cooperatively bound a receiving space for slidably receiving the supporting plate along the third direction, wherein the first guiding bar defines a positioning hole extending through opposite side surfaces of the first guiding bar and communicating with the receiving space, the supporting assembly further comprises a positioning screw, an elastic member, and a steel ball, a first end of the supporting plate defines a plurality of first positioning slots, the steel ball and the elastic member are orderly inserted into the positioning hole, the positioning screw is screwed into the positioning hole, opposite ends of the elastic member respectively abut against the positioning screw and the steel ball, to bias the steel ball to latch into the corresponding first positioning slot of the supporting plate.