1. A headrail covering structure for blinds, comprising a headrail defined by a receiving channel to which a cord-winding control device, a movable seat, and a fixed seat are respectively mounted therein so as to control a lift cord and actuate a blind body collected upwards or expanded downwards thereby, forming a cordless window blind structure; the present invention being characterized by that,
the cord-winding control device and the fixed seat have the top surfaces respectively equipped with a connecting element made up of a set of upper and lower conjoining surfaces, and a covering sheet having a length identical to that of the headrail is provided to attach to the upper conjoining surfaces of the connecting elements thereof, while the lower conjoining surfaces of the connecting elements are respectively adhered onto the cord-winding control device and the fixed seat thereof; therefore, via the sheltering of the covering sheet, the receiving channel of the headrail can achieve dustproof effect so as to protect each assembling part accommodated therein.
2. The headrail covering structure for blinds as claimed in claim 1 wherein the connecting element can be made of double-sided adhesive tapes and equipped with an appropriate thickness.
3. The headrail covering structure for blinds as claimed in claim 1 wherein the headrail can also have a sealing cap respectively mounted to both ends thereon.
4. The headrail covering structure for blinds as claimed in claim 1 wherein the sealing cap has both sides defined by insert grooves to precisely fit to guide tracks that, extending at both sidewalls of the receiving channel, are provided for the sliding movement of the movable seat thereon; both sides of the insert grooves are respectively equipped with an arcuate coupling section identically matched to the form of the headrail so as to precisely abut against the inner surfaces extending at both sides of the guide tracks thereof.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A computer assisted surgery system for conducting orthopedic surgery on a knee joint, the knee joint including a femur defining a longitudinal mechanical axis and having condyles on the distal end thereof, the system comprising:
a condyle digitizer including a posterior condyle abutment surface defining a first plane and a distal condyle abutment surface intersecting perpendicularly the posterior condyle abutment surface and defining a second plane perpendicular to said first plane, and at least one trackable member which is locatable and trackable in three dimensional space by the computer assisted surgery system, thereby defining at least an orientation of the condyle digitizer in real time; and
a computer in communication with the condyle digitizer, the computer being operable to determine a most remote reference point of the femur lying within at least one of said first and second planes when said condyle digitizer is abutted directly against the condyles of the femur such that the posterior condyle abutment surface directly abuts a posterior side of the condyles and the distal condyle abutment surface directly abuts a distal side of the condyles.
2. The computer assisted surgery system as defined in claim 1, further comprising a display device which graphically indicates a location of the determined most remote reference point on the femur.
3. A computer assisted surgery system for orthopedic knee surgery comprising:
a digitizer having perpendicularly intersecting first and second planar surfaces respectively directly abuttable against posterior and distal surfaces of condyles of a femur;
means for determining at least an orientation of said first and second planar surfaces relative to the femur; and
means for determining the location of a reference point in a digitized plane defined on at least one of said first and second planar surfaces when abutted directly against the respective proximal and distal surfaces of the condyles, said reference point being a most remote point of the femur within said digitized plane.
4. The system as defined in claim 3, further comprising means for determining and indicating a location of a distal resection cut calculated by the computer assisted surgery system based on a resection distance measured from said reference point.
5. The computer assisted surgery system as defined in claim 1, wherein the posterior condyle abutment surface or the distal condyle abutment surface of the condyle digitizer are disposed at a predetermined angle relative to the knee joint.
6. The computer assisted surgery system as defined in claim 5, wherein said predetermined angle includes one of a first angle substantially parallel to that of a desired resection cut and a second angle substantially parallel to a flexion angle of the knee joint of said femur.
7. The computer assisted surgery system as defined in claim 1, wherein the computer further comprises a database of coordinates of measured points on femoral condyles, and is operable to determine an average value of a subset of said database to calculate the most remote reference point.
8. The computer assisted surgery system as defined in claim 2, wherein the computer is operable to determine a location of a distal resection cut in the femur by calculating a selected resection distance away from the most remote reference point.
9. The computer assisted surgery system as defined in claim 8, wherein the display device depicts at least the location of the distal resection cut on the femur.
10. The computer assisted surgery system as defined in claim 1, wherein the computer assisted surgery system determines and displays on a display device position and orientation of the condyle digitizer relative to the femur.
11. The computer assisted surgery system as defined in claim 1, wherein a laser marked alignment line is disposed on at least one of the posterior condyle abutment surface and the distal condyle abutment surface of the condyle digitizer.
12. A computer assisted surgery system for orthopedic knee surgery comprising:
a digitizer having perpendicularly intersecting first and second planar surfaces respectively directly abuttable against posterior and distal surfaces of condyles of a femur; and
a computer in communication with the condyle digitizer, the computer being operable to determine at least orientation of said first and second planar surfaces relative to the femur, and to determine the location of a reference point in a digitized plane defined by at least one of said first and second planar surfaces when abutted directly against the respective proximal and distal surfaces of the condyles, said reference point being a most remote point of the femur within said digitized plane.
13. The computer assisted surgery system as defined in claim 12, wherein the computer is operable to determine a location of a distal resection cut in the femur by calculating a selected resection distance away from the most remote point.
14. The computer assisted surgery system as defined in claim 13, further comprising a display device in communication with the computer which depicts at least the location of the distal resection cut on the femur.
15. The computer assisted surgery system as defined in claim 1, wherein the computer assisted surgery system determines and displays on a display device position and orientation of the digitizer relative to the femur.
16. The system as defined in claim 13, further comprising a display device in communication with the computer, the determined location of the distal resection cut in the femur being depicted on said display device.