公开(公告)号：BR9001337A

公开(公告)日：1991-04-02

申请号：BR9001337

申请日：1990-03-22

Applicant: IBM

Inventor： BRUNER DAVID ALLEN

IPC: H01H13/30 ,  H01H13/705 ,  H01H19/38

Abstract: A switch activator is described which is a unitary molded plastic molded coil spring (22) and a pivot plate (16) which pivots to act on a membrane switch (18) when the coil spring buckles under load. The buckling of the spring is controlled by the relative placement of the axis of the spring and a pivot surface around which the top portion of the spring pivots as the spring buckles. The cross section of the spring member is limited in size so as to prevent the forming of a solid column upon compression, while at the same time accommodating the needs for molten plastic flow in the spring during molding.

公开(公告)号：BR9002994A

公开(公告)日：1991-08-20

申请号：BR9002994

申请日：1990-06-26

Applicant: IBM

Inventor： ABELL WILLIAM ALBERTUS JR ,  BRUNER DAVID ALLEN

IPC: H01H13/14 ,  H01H3/12 ,  H01H13/70 ,  H01H3/60

Abstract: A long keybutton (10) is stabilized with a pair of arms (22) and an interconnecting shaft (26). The ends of the arms (32) are connected to the keybutton using a thin serpentine section (28) which distributes stress and forces to improve life of the part, and permits integral molded keybuttons. The integral molded part with the stability of the portions of the keybutton permits the automated assembly of the stabilized keybutton with the keyboard frame (14).