Multi-degree-of-freedom sample holder

1. A multi-degree-of-freedom sample holder, comprising a housing and a rotating shaft, wherein a frame is provided between the housing and the rotating shaft, and the frame is coaxial with the housing and the rotating shaft;

the housing is provided with an inner chamber, the rotating shaft is positioned on the inner chamber of the housing and a self-positioning mechanism is arranged in the inner chamber;

the self-positioning mechanism comprises a supporting block and a pressing plate, the supporting block is provided with a symmetrical inclined plane, and the inclined plane of the supporting block is in contact with the rotating shaft; the pressing plate is provided with a flat plate, and two sides of the flat plate are symmetrically provided with slopes; the rotating shaft is positioned between the supporting block and the pressing plate; a wear-resistant layer is arranged on the surface of the flat plate that is contact with the rotating shaft;

the pressing plate is provided with a pair of mounting wings, and fixing holes are arranged on the mounting wings, and the mounting wings are assembled to the frame through an elastic mounting assembly.

2. The multi-degree-of-freedom sample holder according to claim 1 , wherein the elastic mounting assembly is composed of a screw rod and a spring, the spring is sleeved on the shaft of the screw rod, and the spring is positioned between the mounting wing and the nut of the screw rod.

3. The multi-degree-of-freedom sample holder according to claim 1 , wherein the frame is provided with a matching portion that is in clearance fit with the inner wall of the housing, a receiving groove for accommodating the rotating shaft, and a mounting portion for carrying accessories, and the receiving groove is provided with a symmetrical inclined plane, the mounting portion is fixedly provided with a connecting circuit board, and the connecting circuit board is provided with a connecting wire.

4. The multi-degree-of-freedom sample holder according to claim 1 , wherein the sample holder is provided with a rotating shaft drive assembly, the frame is provided with a receiving groove for receiving the rotating shaft, and the receiving groove is fixed with a supporting block, and the receiving groove is arranged in multiple sections along the axis direction of the frame; a mounting chamber for accommodating a rotating shaft drive assembly is arranged on the frame, and the receiving groove and the mounting chamber are spaced apart.

5. The multi-degree-of-freedom sample holder according to claim 4 , wherein the rotating shaft drive assembly includes a drive unit, each drive unit has a connecting circuit board for current flow, and the connecting circuit board is a printed circuit board, the connecting circuit board is provided with a circuit electrically connected to the rotating drive assembly; each rotating shaft drive assembly is corresponding to an adapter circuit board, the adapter circuit board is a printed circuit board, and the adapter circuit board is provided with a connecting circuit; the current of the connecting circuit board is collected in the adapter circuit board.

6. The multi-degree-of-freedom sample holder according to claim 5 , wherein the connecting circuit board is electrically connected to the adapter circuit board by a wire; and, or the adapter circuit board is fixed on the frame, and the rotating shaft is positioned below the adapter circuit board.

7. The multi-degree-of-freedom sample holder according to claim 4 , wherein the frame is cylindrical, a groove is cut on one side of the frame, and the groove runs through the axis of the frame, and the receiving groove and the mounting cavity are both positioned on the groove; a notch is provided at the position where the connecting circuit board is placed using an arc surface of the frame as a bottom and an opening of the groove as a top, and the notch is formed by cutting part of the frame wall from the top to the bottom.

8. The multi-degree-of-freedom sample holder according to claim 1 , wherein the frame is provided with a connecting circuit board and a notch, the width of each connecting circuit board is less than or equal to the wall thickness of the frame, and the connecting circuit board is fixed on the top surface of the notch with screws; and, or the plane of the frame wall where adapter circuit board is arranged is higher than the plane of the frame wall where the connecting circuit board is arranged.

9. The multi-degree-of-freedom sample holder according to claim 1 , wherein the frame is provided with a mounting threaded hole, and the threaded hole penetrate through the frame from top to bottom.

10. The multi-degree-of-freedom sample holder according to claim 1 , wherein a magnet is provided at the end of the rotating shaft, the frame is provided with a lead-out circuit board, and the frame is opened with a notch, the lead-out circuit board includes a bending portion, and the bending portion is positioned in the notch, the magnetic field sensor is fixed on the bending portion.

11. The multi-degree-of-freedom sample holder according to claim 10 , wherein the lead-out circuit board includes a plane portion, the plane portion and the bending portion are bent to cover the frame, and the plane portion is connected with the bending portion by a wire, and the magnetic field sensor is connected with the bending portion through solder.

12. The multi-degree-of-freedom sample holder according to claim 11 , wherein the lead-out circuit board is a printed circuit board; the plane portion is perpendicular to the bending portion, and the magnetic field sensor is opposite to the magnet.

13. The multi-degree-of-freedom sample holder according to claim 1 , wherein the frame is provided with an optical fiber groove; the optical fiber groove is opened on the side of the frame, and the optical fiber groove penetrates through the frame axially.

14. The multi-degree-of-freedom sample holder with an optical fiber according to claim 13 , wherein the head portion of the sample holder has a front-end circuit board, the front-end circuit board has a guiding plane for guiding the optical fiber, and the front-end circuit board is engaged with the optical fiber groove, and the guiding plane is flush with the optical fiber groove.

15. A multi-degree-of-freedom sample holder with a rotating shaft drive assembly, comprising a frame and a rotating shaft, at least one set of rotating shaft drive assembly is arranged between the frame and the rotating shaft, and each set of the rotating shaft drive assembly includes a drive unit, and the drive unit includes a substrate and a piezoelectric ceramic sheet;

the substrate is a printed circuit board, the substrate has a ceramic sheet area and an electrode area, the piezoelectric ceramic sheet is stacked and bonded to the ceramic sheet area, a conductive coating is evenly coated on the surfaces at both sides of the piezoelectric ceramic sheet, the conductive coating is an upper-layer electrode and a lower-layer electrode; the electrode area is provided with multiple circuits, and the circuits are electrically connected to the conductive coating on the surface of the piezoelectric ceramic sheet;

the ceramic sheet area is provided with one piezoelectric ceramic sheet, or is stacked with at least two piezoelectric ceramic sheets, when there are at least two piezoelectric ceramic sheets, the telescopic direction of the piezoelectric ceramic sheets is different from each other;

the substrate is provided with a recess and a pair of mounting holes, the mounting holes are used as the front and rear ends of the substrate, the ceramic sheet area and the electrode area are positioned in the center of the substrate, the recess is positioned at the front and rear ends of the substrate and around the mounting holes; the ceramic sheet area and the electrode area are positioned on the left and right sides of the substrate;

when there are at least two piezoelectric ceramic sheets, the lower-layer electrode of the lowermost piezoelectric ceramic sheet is in direct contact with the ceramic sheet area on the substrate, and is connected to the electrode area on the substrate through the circuit on the ceramic sheet area; the upper-layer electrode surface of the uppermost piezoelectric ceramic sheet is provided with an area A and an area B; the drive unit is provided with a wear-resistant sheet, and the wear-resistant sheet is pasted to the area A; the area B is electrically connected to an adapter cable; one end of the adapter cable is electrically connected to the electrode area on the substrate.

16. The sample holder with a rotating shaft drive assembly according to claim 15 , wherein the adapter cable is soldered to the area B; or, the adapter cable is bonded to area B with a conductive adhesive.

17. The multi-degree-of-freedom sample holder with a rotating shaft drive assembly according to claim 16 , wherein, when there are at least two piezoelectric ceramic sheets, the upper-layer electrode of each layer of piezoelectric ceramic sheet other than the uppermost piezoelectric ceramic sheet has an overlapping area and an exposed area; the overlapping area is electrically connected to the lower-layer electrode of the upper layer of piezoelectric ceramic sheet of this layer of piezoelectric ceramic sheet; the exposed area is electrically connected to an adapter cable; one end of the adapter cable is electrically connected to the electrode area on the substrate; the adapter cable is soldered to the exposed area; or, the adapter cable is bonded to the exposed area with a conductive adhesive; and, or the adapter cable is soldered to the electrode area on the substrate.

18. The multi-degree-of-freedom sample holder with a rotating shaft drive assembly according to claim 17 , wherein the drive unit comprises a first electrode plate, a second electrode plate and a third electrode plate, and the piezoelectric ceramic sheet includes a first piezoelectric ceramic sheet and a second piezoelectric ceramic sheet; the sequence of mounting is the first electrode plate, the first piezoelectric ceramic sheet, the second electrode plate, the second piezoelectric ceramic sheet, and the third electrode plate successively; the shear deformation direction of the first piezoelectric ceramic sheet is different from the shear deformation direction of the second piezoelectric ceramic sheet; the third electrode plate is close to the rotating shaft but not in contact with the rotating shaft.

19. The multi-degree-of-freedom sample holder with a rotating shaft drive assembly according to claim 18 , wherein the first electrode plate is adhesively fixed on the substrate, the substrate is an insulating layer, and the third electrode plate is provided with a wear-resistant layer that is in contact with the rotating shaft.

20. A multi-degree-of-freedom sample holder having an electrostatic lead-out function, the sample holder is provided with a nanopositioner, the nanopositioner includes a pressing component assembly, and the pressing component assembly includes at least two pressing components and an elastic connecting component, and a nano-actuator provided with a casing for loading samples, the casing is provided with a pre-tightening screw for locking samples, wherein the tail end of the nano-actuator is provided with an electrostatic lead-out component, the pre-tightening screw and the electrostatic lead-out component are conductive, and the nano-actuator is provided with an electrical path that is in communication with the pre-tightening screw and the electrostatic lead-out component, the electrostatic lead-out component is connected with the wire;

the electrical path includes a pressing component assembly and a connecting wire, the pressing component assembly includes a first pressing component and a second pressing component, both the first pressing component and the second pressing component are conductors, the electrostatic lead-out component is positioned on the second pressing component, at least one elastic connecting component is provided between the first pressing component and the second pressing component, the elastic connecting component includes a screw rod and a spring, the spring is sleeved on the screw rod, and both the screw rod and the spring are conductors;

the electrostatic lead-out component is a conductive screw.

21. The multi-degree-of-freedom sample holder having an electrostatic lead-out function according to claim 20 , wherein the second pressing component is provided with a screw hole mating with the conductive screw, and the nut at the head portion of the conductive screw is in the direction away from the first pressing component, the wire is positioned between the nut at the head portion of the conductive screw and the second pressing component.

22. The multi-degree-of-freedom sample holder having an electrostatic lead-out function according to claim 21 , wherein the screw rod portion of the conductive screw is positioned in the second pressing component; and, or the tail portion of the conductive screw is fixed with the second pressing component by spot welding; and, or the head portion of the conductive screw is exposed on the second pressing component.