Wedge based circuit board retainer with dual end drivescrew

A locking retainer, comprising:

• a mounting segment;
• a drive wedge disposed distally to the mounting segment;
• an anchor segment located distally relative to the drive wedge;
• one or more intermediate wedges disposed in series between the drive wedge and the anchor segment along a longitudinal axis;
• wherein the drive wedge, anchor segment, and one or more intermediate wedges are movably connected together in series;
• a drive screw having a proximal portion with a first thread engaged with the mounting segment, and a distal portion with a second thread engaged with the drive wedge;
• wherein the first and second threads are in opposing directions;
• wherein the retainer is movable between a retracted configuration and a deployed configuration:
• wherein, in the retracted configuration:
• the retainer has first height normal to the longitudinal axis;
• the mounting segment and the anchor segment are separated by a first distance;
• the drive wedge and anchor segment are separated by a second distance;
• wherein, in the deployed configuration:
• the retainer has second height normal to the longitudinal axis;
• the second height greater than the first height;
• the mounting segment and the anchor segment are separated by the first distance;
• the drive wedge and anchor segment are separated by a third distance;
• the third distance less than the second distance.