Patent ID: 8476916
Filing Date: 2013-07-02
Classification: G01R,Y10T

Abstract:
1. A plunger for feeding and withdrawing an electronic component, in particular integrated circuits, to or from a contact device that is connected to a test device, comprising: a plunger retaining part; and a plunger sliding part that is displaceably guided on the plunger retaining part, and comprises a base body and a plunger head is securable to said base body for retaining a component by negative pressure, wherein the plunger head is securable on the base body by a quick locking system which comprises a first locking means disposed on said base body and a second locking means disposed on the plunger head, wherein the first locking means and the second locking means are configured to be brought into a rear-engagement position by rotating the plunger head relative to the base body, in which the plunger head is axially coupled to the base body; and wherein the first locking means disposed on the base body comprises a ball part protruding in a direction of the plunger head and has at least two axial grooves distributed over a circumference and interposed spherical surface sections and the second locking means disposed on the plunger head has clip elements which are moveable along the axial grooves and which are brought into a position where they engage the spherical surface sections from the rear by rotating the plunger head.