Force detection bone screw device
A force detection bone screw device includes a bone screw body, a spring structure, a detection module, and an antenna module. The bone screw body includes a cylinder. The spring structure, the detection module and the antenna module are respectively arranged in the accommodation portion of the column. The spring structure includes a body, a bearing part, a fixing part and at least one bending strain structure. One end of the body is connected to the bearing part, and the other end of the body is connected to the fixing part, and the fixing part is fixed in the cylinder. Each bending strain structure is respectively provided on the body. The body has an axial direction, and each bending strain structure has deformation in at least one direction different from the axial direction. The detection module includes at least one strain element and a sensing component.
1 . A force detection bone screw device used to detect a force of a suture, the force detection bone screw device comprising:
a bone screw body, comprising a cylinder having an opening end and an insertion end opposite to each other, wherein an accommodating portion within the cylinder is connected with the opening end;
a spring structure, provided in the accommodating portion, wherein the spring structure comprises a body, a bearing part, a fixing part, and at least one bending strain structure, one end of the body is connected to the bearing part, another end of the body is connected to the fixing part, the fixing part is fixed within the cylinder, the fixing part is adjacent to the insertion end, one side of the bearing part is used to connect to the suture, and each of the bending strain structures is respectively provided on the body, the body has an axial direction, and each of the bending strain structures has deformation in at least one direction different from the axial direction;
a detection module, provided in the accommodating portion, wherein the detection module comprises at least one strain element and a sensing component, each of the strain elements is used to measure a stress of bending moment strain generated by the bending strain structure, and one end of the sensing component is connected to the strain element; and
an antenna module, provided in the accommodating portion, and the antenna module is connected to the sensing component.
2 . The force detection bone screw device according to claim 1 , wherein each of the strain elements is disposed at a corresponding position of the corresponding bending strain structure in the body.
3 . The force detection bone screw device according to claim 2 , wherein the at least one bending strain structure has a concave surface and a convex surface opposite to each other, and the at least one strain element can be disposed on a location of one of the concave surface and the convex surface.
4 . The force detection bone screw device according to claim 2 , wherein the at least one bending strain structure is a concave structure or a bending structure of the body.
5 . The force detection bone screw device according to claim 1 , wherein the strain element is a strain gauge or a piezoelectric material structure.
6 . The force detection bone screw device according to claim 1 , wherein the bone screw body comprises a plug cover, the plug cover is provided with a positioning pin hole, and the axial direction of the spring structure passes through the positioning pin hole.
7 . The force detection bone screw device according to claim 6 , wherein a setting height position of the spring structure is the same as a setting height position of the positioning pin hole.
8 . The force detection bone screw device according to claim 6 , wherein an inner surface of the positioning pin hole is a smooth structure.
9 . The force detection bone screw device as claimed in claim 6 , wherein an edge of the positioning pin hole has a chamfered structure.
10 . The force detection bone screw device according to claim 1 , wherein the bone screw body comprises a plug cover, a turn-in structure is provided inside the cylinder close to the opening end, the turn-in structure is an inner hexagonal structure within the cylinder, the plug cover is located between the turn-in structure and the spring structure, and the plug cover comprises a suture through hole.
11 . The force detection bone screw device according to claim 1 , wherein the fixing part comprises an engaging element and a bottom element, the engaging element is connected between the body and the bottom element, the engaging element has an engaging structure, a protruding structure is provided within the cylinder, and the protruding structure is fixed to the engaging structure.
12 . The force detection bone screw device according to claim 1 , wherein a material of the spring structure is polyetheretherketone.
13 . The force detection bone screw device as claimed in claim 1 , wherein a material of the spring structure is a non-magnetic metal.
14 . The force detection bone screw device according to claim 1 , wherein a material of the bone screw body is polyetheretherketone.
15 . The force detection bone screw device according to claim 1 , wherein a material of the bone screw body is a non-magnetic metal.
16 . The force detection bone screw device according to claim 1 , wherein the bone screw body comprises a bottom cover, the bottom cover is disposed and closed at a bottom of the cylinder, and one side of the bottom cover is the insertion end.
17 . The force detection bone screw device according to claim 16 , wherein the cylinder is provided with a card groove structure, the bottom cover comprises an anti-rotation structure and a cover body, the anti-rotation structure is connected to the cover body, the anti-rotation structure is disposed inside the cylinder, and a side edge of the cover body is combined with the card groove structure.
18 . The force detection bone screw device according to claim 1 , wherein the bone screw body comprises a plurality of threads, and the threads are respectively protruding and disposed from an outer surface of the cylinder.
19 . The force detection bone screw device according to claim 1 , wherein each of the strain elements comprises a full bridge circuit.
20 . The force detection bone screw device according to claim 19 , wherein the sensing component comprises a voltage regulation and signal amplification circuit and a chip, the full bridge circuit is connected to the voltage regulation and signal amplification circuit, the voltage regulation and signal amplification circuit is connected to the chip, and the chip is connected to the antenna module.
21 . The force detection bone screw device according to claim 20 , wherein the voltage regulation and signal amplification circuit comprises a regulator and an instrumentation amplifier.
22 . The force detection bone screw device according to claim 20 , wherein the chip comprises an NFC chip.