Test card, a flexible membrane provided with points of contact guided by a mechanism for adjusting centralizes suspension

摘要

A guide and suspension mechanism 20 for a test card to the membrane comprises a frame 22 fixed bearing on a printed circuit 33 by means of feet adjustable in length, and a pair of blades 23, 24 respectively secured to the flexible frame 22 and connected by their ends to a plate 17 of the support piece 15. The s-shaped deformation of the blades 23, 24 during a test results in a first vertical movement to the contact pressure at the same time preserving the orientation of the horizontal plane passing through the top of the points of contact 12, and a second horizontal movement causing a friction effect on the plate 11 for the self-cleaning of the contact zones.