Novel Passive Two-Stage Magnetic Targeting Devices for Distal Locking of Interlocking Nails

Table 1

Dimensions of the 2nd-stage targeting device.

Description	Parameter	Design size (mm)
The radius of the 2nd-stage targeting device	R	30
The thickness of each layer of the baseboard	s	2
The vertical distance between rotary joint and the baseboard	h	5
The radius of rotary joint of the magnetic pin	Rb	3
The distance from the rotary joint of pin to the center of the board	Rm	18
The diameter of the hole on the conductive ring	d	3.8