Patent ID: 7020542

Claim:
An apparatus for measuring and fixing a three-dimensional location of medical instrument, which can be easily placed at a desired location by a user and carry out measuring and fixing the location simultaneously, comprising: a link device, having multi-degrees-of-freedom with comprising numbers of rotational joints, interlocked with PC, an external controller, and able to communicate through a CAN (control area network) bus; a balancing means, of which a weight and a spring is installed at each joint, for compensating the movement and self-weight of said link device for a user to actuate the link device easily; a module means for modularizing location-detection means and fixing means including controllers applied to said joints for easy assembly, repair and replacement; a dispersed control system comprising a main controller and dispersed controllers installed at said joints for instrumental calculation by packet transmission through said CAN bus with said PC, an external controller; an electric breaking means, controlled to be operated by an external switch or program, for enabling said link device to be moved freely and fixing the location of said link device; and at least two or more fixing pins constituted at the end-section of said link device and a pin-hole means at the base of said link device, where the fixing pins can be assembled, for enlightening the origin of said link device, characterized in that said apparatus is able to enlighten the origin of said link device and measure the relative coordinates of said link device and an external device by fabricating a pin-hole means, possibly being assembled with said fixing pins constituted at the end-section of said link device, at said external device.