CN211023169U

CN211023169U - Brain stereotaxic apparatus

Info

Publication number: CN211023169U
Application number: CN201921379195.XU
Authority: CN
Inventors: 张追阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-07-17
Anticipated expiration: 2029-08-23

Abstract

The utility model relates to a brain stereotaxic apparatus, which comprises a probe component, an arc arch frame component and an adjusting ring component; the adjusting ring component has a circular outer contour and an inner contour; arc-shaped side sliding grooves are symmetrically formed in the side wall of the outer contour, and locking sliding grooves are formed in the upper surface and the lower surface of the outer contour; the locking sliding groove and the side sliding groove correspond to each other in position, and a locking knob is assembled in the locking sliding groove; the arc arch frame assembly is arranged in the side sliding groove through the connecting pieces arranged at two ends, and the arc arch frame assembly can synchronously slide and rotate around the diameter of the outer contour circle where the connecting pieces are located; the connecting piece is locked in the locking chute through the locking knob; skull plate clamping components are uniformly and symmetrically arranged between the two lateral sliding grooves; the probe assembly is mounted on the arch assembly, is slidable along the arch assembly, and is rotatable about the arch assembly. The orientation instrument optimizes the structure of the whole set of brain stereotaxic instrument; providing more operating options for the clinician and hopefully improving the target positioning accuracy.

Description

Brain stereotaxic apparatus

Technical Field

The invention relates to the technical field of medicine, in particular to a brain stereotaxic apparatus.

Background

at present, the L eksell brain stereotaxic apparatus (G type) of medical dada (Elekta) company is widely used at home and abroad, the apparatus mainly comprises a target positioning frame [ eight-side rectangular base ring (base ring) + a reference system (custom system) ], a skull fixing component (containing four metal columns), three groups of target 'adjusting scales' (front, rear, left, right and upper and lower spatial directions), a semicircular bow frame (radius 190 mm) and a probe system, wherein the left and right adjusting scales and the upper and lower adjusting scales are connected by a collar (axis ring), the former is connected with the bow frame, the latter is connected with the base ring, and the result of model test shows that the overall precision error of the probe reaching the target is +/-0.7 mm.

As L eksell brain stereotactic instruments were originally designed at the end of the last 40 th century, where target location was possible only by conventional X-ray imaging, special positioning frames were required, and with the advent of Computed Tomography (CT), Magnetic Resonance Imaging (MRI) in the 70-80 th century, L eksell brain stereotactic instruments were also continually improved to accommodate changes in imaging technology, but positioning frames were retained.

The instrument is used for positioning the intracranial target point in space, and measures the vertical distance between the target point and three coordinate axes of a positioning frame X, Y, Z by means of X-ray, CT or MR scanning after being assisted by a positioning frame, and then the target point is placed in the center of a semicircular bow frame by using three groups of adjustable rulers, so that any probe angle vertical to the bow frame always aims at the center of the target point/the bow frame, namely the bow frame center principle. When the probe system slides on the bow frame and is combined with the bow frame to rotate around the center of the shaft ring, the space track of the probe path is in a spherical track. Considering that the radius of the semicircular bow frame is a fixed value, the distance d (also called working length) from the starting point to the target point of the probe set by the instrument corresponds to the radius, namely, the radius is always a fixed value (190 mm).

in terms of target accuracy of neurosurgery, although the Nexframe improves operation convenience and patient comfort, the accuracy in the front-back direction (Y axis) of a three-dimensional space is slightly lower than that of L eksell.

Disclosure of Invention

The following technical scheme is adopted for realizing the invention: the brain stereotaxic apparatus comprises a probe assembly, an arc arch assembly and an adjusting ring assembly;

The adjusting ring component has a circular outer contour and an inner contour;

The side wall of the outer contour is symmetrically provided with arc-shaped side sliding grooves, and the upper surface and the lower surface of the outer contour are provided with locking sliding grooves; the locking sliding groove and the side sliding groove correspond to each other in position, and a first locking knob is assembled in the locking sliding groove;

The arc arch assembly is arranged in the side sliding groove through connecting pieces arranged at two ends of the arc arch assembly, and the arc arch assembly can synchronously slide and rotate around the diameter of an outer contour circle where the connecting pieces are located; the connecting piece can be locked in the locking sliding groove through the first locking knob;

Skull plate clamping components are uniformly and symmetrically arranged between the two lateral sliding grooves;

The probe assembly is mounted on the arch assembly, can slide along the arch assembly, and can rotate around the arch assembly.

Further, the cranial plate clamping assembly comprises an adjusting piece, an adjusting piece locking piece, a plurality of rotating upper grooves and side grooves;

The side grooves are uniformly and symmetrically distributed on the outer contour side surface between the two side sliding grooves; the plurality of rotary upper grooves are arranged on the upper surface and the lower surface of the adjusting ring assembly and correspond to the positions of the side grooves;

The side groove is slidably provided with an adjusting piece, and an adjusting piece locking piece is vertically assembled in the upper rotating groove;

Every side groove is provided with two hemisphere grooves with the crossing department of the cell body in the groove of corresponding rotation, the rotatable hemisphere arch that is provided with in the hemisphere inslot, two hemispherical bellied opposite faces are provided with the thread groove, the regulating part is provided with external screw thread and thread groove cooperation assembly outward, realizes the up-and-down and seesaw of regulating part to lock through the regulating part retaining member.

Further, the connecting piece comprises an axial sliding block, an axial rotating ring and a locking mechanism;

The axial rotating ring is sleeved on the axial sliding block and can rotate around a corresponding structure on the axial sliding block, and the axial rotating ring and the axial sliding block are locked through a locking mechanism;

The locking mechanism comprises a second locking knob and a locking clamping block;

The axial rotating ring comprises a hollow circular rotating part, a locking part and a connecting part;

The axial sliding block comprises a sliding part, a rotating shaft and a blocking part which are integrally formed from inside to outside;

The sliding part is arranged in the side sliding groove in a sliding plate structure in a sliding and inserting way, the blocking part is in a hollow ring body structure, and a rotating shaft is arranged at the center of the ring body; the sliding part is provided with a threaded hole, and the threaded hole is matched and screwed with the first locking knob;

A locking clamping groove is formed in the joint of the locking part and the hollow circular rotating part, a locking clamping block is assembled in the locking clamping groove, and a second locking knob is arranged on the locking clamping block;

The end of the arch body is connected with the joint part, the rotation of the axial rotating ring drives the arch body to rotate, and the axial sliding block drives the arch body to integrally slide when sliding in the side sliding groove.

Furthermore, the hollow circular rotating part is sleeved outside the rotating shaft, the locking clamping block is a wedge mechanism, and the second locking knob is screwed to drive the wedge mechanism to move in the locking clamping groove so as to clamp the rotating shaft, so that the hollow circular rotating part is locked to rotate.

Furthermore, the arc arch frame assembly is of a large half arc rod-shaped structure;

The probe assembly is connected with the arc arch frame assembly through a cylindrical sliding block; the probe assembly can slide and can be arranged on the arc arch assembly through 360-degree rotation of the cylindrical sliding block;

The inside arc structure that is for cooperating with the bow member body of cylindricality slider, the outside is cylindrical structure.

Furthermore, the probe assembly comprises a probe base, and a rotating ring is fixedly arranged at the lower part of the probe base and sleeved on the cylindrical sliding block;

The probe base includes a front plate and a back plate,

The front panel is provided with an assembly block, the assembly block is provided with an up-down moving groove for installing a probe, needle holder clamping grooves are symmetrically arranged on two sides of the up-down moving groove, and needle holder structures are arranged in the needle holder clamping grooves;

A needle holder locking part is arranged on one side of the needle holder clamping groove;

A rotating disc is arranged on the base and penetrates through the front and back panels, and a rotating digital display instrument is arranged on one surface of the rotating disc and the other surface of the rotating disc of the assembling block;

Furthermore, a probe locking mechanism for locking the rotation of the rotating disc is arranged on the rotating disc;

And a cylindrical sliding block locking device and a probe base locking device are respectively arranged at the joint of the rotating ring and the probe base.

Furthermore, the locking mechanism is a wedge, the cylindrical sliding block locking device and the probe base locking device are screws, and locking is achieved through screwing.

Compared with the prior art, the invention has the following advantages:

1. The three distance measurement reference base points on the adjusting ring are adopted, the spatial distance between the target point and the three reference points can be measured by utilizing CT and MRI imaging technologies, and a target point spatial positioning distance measurement frame assembly is not needed;

2. The adjusting ring is directly fixed with the skull plate by means of screws, and four connecting column assemblies (post) between the base ring and the skull plate are not needed;

3. The large semicircular arch frame is designed to be connected with the adjusting ring, so that an adjusting ruler or a guide arm assembly is not needed, the working space between a target point and the arch frame can be ensured, and the outer diameter of the arch frame can be effectively reduced;

4. The arch center can rotate around the horizontal axis (X axis) direction of the adjusting ring, and can rotate around the central upper and lower axes (Z axis) of the adjusting ring, and the latter can realize that the space angles of the two probes change together;

5. The angle adjustment adopts a digital display instrument (a grating can be adopted subsequently), so that the manual error caused by reading of mechanical scales can be reduced, and the spatial positioning precision of the target spot is expected to be further improved;

6. The whole structure of the instrument is simpler, more compact and non-magnetic, and the main body is made of titanium alloy material, so that the self weight of the instrument can be effectively reduced, and the comfort of a patient during operation can be improved;

7. Compared with the existing framed brain stereotaxic apparatus, the product realizes the spherical track by the spatial positioning motion of the target spot, not only meets the requirements of clinical intracranial focus biopsy and treatment, but also can provide a stereo path for radiotherapy. But the adjustable parameters are more, which is beneficial for the clinician to make more operation choices according to the actual disease (such as advantage 4).

in a word, because the product is different from the L eksell in the principle of target spot space positioning, a positioning frame, a regulation ruler, a connecting metal column and other components are not needed, and the size of the bow frame is relatively reduced, so that the whole structure is simpler and more compact, the dead weight of the instrument can be effectively reduced, and the comfort level of a patient during operation is improved.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is an overall assembly view of the present invention.

Figure 3 is a schematic view of a trim ring assembly of the present invention.

Figure 4 is a top view of the adjustment ring assembly of the present invention.

3 fig. 3 5 3 is 3 a 3 view 3 from 3 a 3- 3 a 3 of 3 fig. 3 4 3. 3

FIG. 6 is an assembled front view of the probe assembly and arch assembly of the present invention.

FIG. 7 is an assembled front view of the probe assembly and arch assembly of the present invention. Back side view of

Fig. 8 is a schematic view of a connector.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1-8, the brain stereotaxic apparatus includes a probe assembly 3, an arc arch assembly 2 and an adjusting ring assembly 1;

The adjustment ring assembly 1 has a circular outer contour 10 and an inner contour 11;

Arc-shaped side sliding grooves 107 are symmetrically formed in the side wall of the outer contour 10, and locking sliding grooves 106 are formed in the upper surface and the lower surface of the outer contour; the locking sliding groove 106 and the side sliding groove 107 correspond to each other in position, and a first locking knob 103 is assembled in the locking sliding groove 106;

The arc-shaped arch center component 2 is arranged in a side sliding groove 107 through connecting pieces arranged at two ends, and the arc-shaped arch center component 2 can synchronously slide and rotate around the diameter of an outer contour circle where the connecting pieces are located; the connecting piece is locked in the locking chute 106 by the first locking knob 103;

Skull plate clamping components are uniformly and symmetrically arranged between the two lateral sliding grooves 107;

The probe assembly 3 is mounted on the arch module 2, can slide along the arch module 2, and can rotate around the arch module 2.

Further, the cranial plate clamping assembly comprises an adjustment member 104, an adjustment member lock 109, a plurality of rotating upper slots 105 and side slots 108;

The side grooves 108 are uniformly and symmetrically distributed on the side surface of the outer contour 10 between the two side sliding grooves 107; a plurality of upper rotating grooves 105 are formed on the upper and lower surfaces of the adjustment ring assembly 1 to correspond to the positions of the side grooves 108;

The side groove 108 is slidably provided with the adjusting piece 104, and an adjusting piece locking piece 109 is vertically assembled in the upper rotating groove 105;

Every side groove and the crossing department of cell body that rotates the upper trough that corresponds are provided with two hemisphere grooves 111, rotatable hemisphere protruding 112 that is provided with in hemisphere groove 111, the opposite face of two hemisphere protruding 112 is provided with the thread groove, regulating part 104 is provided with external screw thread and thread groove cooperation assembly outward, realizes the up-and-down and seesaw of regulating part to lock through regulating part retaining member 109.

Two blind holes 110 are arranged on the adjusting ring assembly positioned between the cranial plate clamping assemblies, and the blind holes 110 are used for connecting and fixing the direction finder with external equipment.

As shown in fig. 1, three distance measurement reference base points on the outer contour 10 of the adjustment ring assembly 1 are A, B, C, a target point is M, a plane vertical projection point of the outer contour 10 is H, the point is vertically intersected with the outer diameter (AB) of the outer contour 10 at a point E, the midpoint of AB is G, and is also the center of the outer contour 10; the two spatial needle feed angles of the probe are psi and omega respectively; the needle insertion distance is NM, and the N point is the needle insertion starting point.

Wherein the upper and lower surfaces of the outer contour 10 are provided with scale angles. Two detachable positioning blocks 102 are respectively arranged at the 0-degree position of the side groove of the outer contour 10, and two space target point ranging reference points (namely two points of the outer circle diameter A, B) 1011 are respectively arranged at the centers of the side surfaces of the two detachable positioning blocks.

Meanwhile, the positioning block is provided with a locking screw 1010 which is locked with the outer contour 10. There are four distance measurement reference base points 1012, i.e., points C, on the central plane of the outer contour 10 at a certain angle from the intersection of the centers G of the two points A, B (in practice, the reference base points are selected from one of the vertical projection areas of the torus according to the target point in space; therefore, the reference base point A, B, C forms a right triangle on the outer circle central plane of the outer contour 10).

The outer contour 10 is further provided with four central adjustment members 104 which serve for fixation to the skull plate. The adjustment member 104 is a screw or a rotatable screw rod.

The outer contour 10 is provided with a rotary upper groove 105 and a side groove 108, when the adjusting member is a screw, the screw 104 can be adjusted at a certain angle in the horizontal and up-down directions, and the screw and the skull plate can be optimally fixed. Four screws 104 are attached with slider and ring locking structures 109. When the four screws are fixed with the skull plate and the outer contour 10 and the screws are locked, the outer contour 10 and the skull plate are in a relatively fixed state.

Further, the connecting piece comprises an axial sliding block 207, an axial rotating ring 206 and a locking mechanism; the axial rotating ring 206 is sleeved on the axial sliding block 207 and can rotate around a corresponding structure on the axial sliding block, and the axial sliding block and the axial rotating ring are locked by a locking mechanism;

The locking mechanism comprises a second locking knob 205 and a locking fixture block 204;

The axial rotation ring 206 comprises a hollow circular rotation portion 206A, a locking portion 206B and an engagement portion 206C; the axial sliding block 207 comprises a sliding part 207A, a rotating shaft 207B and a blocking part 207C which are integrally formed from inside to outside;

The sliding part 207A is arranged in the side sliding groove 107 in a sliding plate structure in a sliding and inserting way, the blocking part 207C is in a hollow ring body structure, and a rotating shaft 207B is arranged at the center of the ring body; a threaded hole 207D is formed in the sliding portion 207A, and the threaded hole 207D is matched and screwed with the first locking knob 103; a locking clamping groove 206D is formed at the joint of the locking part 206B and the hollow circular rotating part 206A, a locking clamping block 204 is assembled in the locking clamping groove, and a second locking knob 205 is arranged on the locking clamping block;

The connecting portion 206C is connected with the end of the arch body 201, the rotation of the axial rotating ring drives the arch body 201 to rotate, and the axial sliding block 207 drives the arch body 201 to integrally slide when sliding in the side sliding groove.

Further, the hollow circular rotating portion 206A is sleeved outside the rotating shaft 207B, the locking latch 204 is a wedge mechanism, and the second locking knob 205 is screwed to drive the wedge mechanism to move in the locking latch groove 206D to latch the rotating shaft 207B, so as to lock the rotation of the hollow circular rotating portion 206A.

A digital display instrument 210 is arranged outside the blocking part 207C on one side in a fitting manner.

Further, the arc arch assembly 2 is of a large half arc rod-shaped structure;

The probe assembly 3 is connected with the arc arch assembly 2 through a cylindrical sliding block 308; the probe assembly 3 can be arranged on the arc arch assembly 2 in a sliding manner and can rotate 360 degrees through the cylindrical sliding block;

The cylindrical sliding block 308 is internally provided with an arc-shaped structure matched with the arch body 201, and externally provided with a cylindrical structure.

Further, the probe assembly comprises a probe base 3010, a rotating ring 307 is fixedly arranged at the lower part of the probe base 3010, and the rotating ring 307 is sleeved on the cylindrical sliding block 308;

The probe base 3010 includes a front panel and a back panel,

An assembling block 306 is arranged on the front panel, an up-down moving groove 303 provided with a probe 301 is formed in the assembling block, needle holder clamping grooves 305 are symmetrically arranged on two sides of the up-down moving groove 303, and needle holder structures 302 are assembled in the needle holder clamping grooves;

A needle holder locking part 310 is arranged on one side of the needle holder clamping groove;

A rotating disc 304 penetrates through the front and back panels on the base, and one surface of the rotating disc is connected with an assembling block 306;

A rotary digital display instrument 3014 (for displaying the rotation of the probe assembly 3) is arranged on the other surface of the rotary disc 304;

Further, a probe locking mechanism 309 for locking the rotation of the rotating disc 304 is arranged on the rotating disc 304;

An annular slide block locking device 3011 and a probe base locking device 3013 are respectively arranged at the joint of the rotating ring 307 and the probe base 3010.

Further, a sliding scale window 3012 is opened on the rotating ring 307.

Further, the locking mechanism 309 is a wedge, the cylindrical slider locking device 3011 and the probe base locking device 3013 are screws, and locking is achieved by screwing down the screws.

Further, the adjusting member 104 is a rotatable screw structure.

The working principle is as follows:

1. The principle of target space positioning: the product mainly comprises an adjusting ring component 1, an arc arch frame component 2 (bow frame for short) and a probe system component.

The adjusting ring assembly comprises a circular outer contour and an elliptical inner contour, so the outer contours are collectively referred to as a ring;

Taking the diameters of the excircle center layer of the circular ring as A, B two target point space ranging reference base points respectively, wherein the middle point of the diameters is set as a G point; and a 'C base point' is additionally taken on the layer surface of the excircle center, and the three base points form a right-angled triangle. Wherein, the diameter of the excircle of the ring is a fixed value; the diameter of the semicircular ring is also constant when the bow crosses A, B intersection point. And when the point C is determined, three sides of the right triangle are also constant.

firstly, AM (x), BM (y) and CM (z) are respectively measured by CT/MRI isotropic voxel imaging technology, then, by means of related formulas of plane geometry, solid geometry, trigonometric function and the like and a fixed-side right triangle, the MG distance, the included angle (set as psi) between the triangular AMB plane and the circular plane and the included angle (set as omega) between the triangular AMB plane and the AB connecting line can be obtained, the included angle is two space needle inlet angles, because the target point M is positioned in the cranium, the MG connecting line in the triangular AMB plane is outwards extended to a certain fixed point (set as N point) of the probe system, the N point is the starting point of the probe distance from the target point, and the needle can rotate around the point, therefore, A, G, B, M and N points are positioned in the same plane, the NG connecting line must pass through the target point M, the bow frame is parallel to the plane, finally, by means of the above formula, the NG distance can be obtained, the distance (d) = NG-MG, that is the needle inlet distance between the N point and N point on the probe system, and the target point, and the instrument can be positioned on the principle of different eL.

2. The target space positioning motion trail (angle, probe distance and the like) is automatically calculated by adopting micro-variation:

The first probe path (two spatial needle advance angles + needle advance distance) only needs to input x, y and z values. When the first path is a non-optimal/safe path, then it can be adjusted by:

2.1, when the bow frame plane and the circular ring plane are fixed (the psi angle is not changed) and the probe angle omega needs to be changed, only the variable angle (set to Є) is needed to be input, and the micro-variable will automatically give the probe adjustment angle (set) and the probe distance d' again through the above calculation formula.

2.2, when the psi angle between the bow frame plane and the circular ring plane needs to be changed, the micro-variation program will automatically provide another probe adjustment angle (set as rho) and a probe distance d' again through the above calculation formula by inputting a certain angle (set as omega) value of the probe system rotating around the bow frame.

2.3, when the omega angle and the psi angle between the bow rack plane and the circular ring plane need to be changed simultaneously, the changing value of psi angle is automatically given out by the micro-variation process by rotating a certain angle (set as phi) around the circle center of the circular ring by means of the bow rack and inputting the value, and the new omega, value and probe distance d' ″ are given out simultaneously.

The cranial splint clamping assembly comprises an adjusting piece 104 and two hemispherical bulges moving in a hemispherical groove 111, so that the cranial splint can be adjusted up and down, left and right and back and forth, and the linear distances (x, y and z) between a target point and A, B, C three-point reference base points are measured by CT/MR scanning. The yoke is then coupled to the ring in the 0 position by means of the axial sliding block 207. The distance of x, y and z is input into the micro-programmed computer to obtain the path from the probe to the target point, including two spatial needle-feeding angles, probe regulating angle and needle-feeding distance. When a certain space angle of the path of the first probe needs to be changed, the adjustment angle needs to be input into a computer, and the micro-programming can automatically give a re-needle inserting angle and a needle inserting distance; when two space angles need to be changed simultaneously, the bow frame rotates for a certain angle (fixed angle) around the circular ring, and the fixed angle is input into a computer, so that a new needle inserting path and a new needle inserting distance can be automatically obtained.

Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stereotaxic apparatus for brain, which is characterized in that,

Comprises a probe component (3), an arc arch center component (2) and an adjusting ring component (1);

The adjusting ring assembly (1) is provided with a circular outer contour (10) and an inner contour (11);

The side wall of the outer contour (10) is symmetrically provided with arc-shaped side sliding grooves (107), and the upper surface and the lower surface of the outer contour are provided with locking sliding grooves (106); the locking sliding groove (106) and the side sliding groove (107) correspond to each other in position, and a first locking knob (103) is assembled in the locking sliding groove (106);

The arc-shaped arch center component (2) is arranged in the side sliding groove (107) through connecting pieces arranged at two ends, and the arc-shaped arch center component (2) can synchronously slide and rotate around the diameter of an outer contour circle where the connecting pieces are located; the connecting piece can be locked in the locking sliding groove (106) through the first locking knob (103);

Skull plate clamping components are uniformly and symmetrically arranged between the two lateral sliding grooves (107);

The probe assembly (3) is installed on the arc-shaped arch assembly (2), can slide along the arc-shaped arch assembly (2) and can rotate around the arc-shaped arch assembly (2).

2. The brain stereotactic apparatus of claim 1, wherein:

The cranial plate clamping assembly comprises an adjusting piece (104), an adjusting piece locking piece (109), a plurality of rotating upper grooves (105) and side grooves (108);

The side grooves (108) are uniformly and symmetrically distributed on the side surface of the outer contour (10) between the two side sliding grooves (107); a plurality of rotary upper grooves (105) are arranged on the upper surface and the lower surface of the adjusting ring assembly (1) and correspond to the positions of the side grooves (108);

The side groove (108) is slidably provided with an adjusting piece (104), and an adjusting piece locking piece (109) is vertically assembled in the upper rotating groove (105);

Every side groove (108) and the crossing department of cell body that rotates upper trough (105) that corresponds are provided with two hemisphere grooves (111), rotatable hemisphere arch (112) that are provided with in hemisphere groove (111), the opposite face of two hemisphere arch (112) is provided with the thread groove, regulating part (104) are provided with external screw thread and thread groove cooperation assembly outward, realize the up-and-down and seesaw of regulating part to lock through regulating part retaining member (109).

3. The brain stereotactic apparatus of claim 1, wherein:

The connecting piece comprises an axial sliding block (207), an axial rotating ring (206) and a locking mechanism;

The axial rotating ring (206) is sleeved on the axial sliding block (207), can rotate around a corresponding structure on the axial sliding block, and is locked between the axial rotating ring and the axial sliding block through a locking mechanism;

The locking mechanism comprises a second locking knob (205) and a locking fixture block (204);

The axial rotating ring (206) comprises a hollow circular rotating part (206A), a locking part (206B) and a connecting part (206C);

The axial sliding block (207) comprises a sliding part (207A), a rotating shaft (207B) and a blocking part (207C) which are integrally formed from inside to outside;

The sliding part (207A) is arranged in the side sliding groove (107) in a sliding and inserting manner in a sliding plate structure, the blocking part (207C) is in a hollow ring structure, and a rotating shaft (207B) is arranged at the center of the ring structure; a threaded hole (207D) is formed in the sliding portion (207A), and the threaded hole (207D) is matched and screwed with the first locking knob (103);

A locking clamping groove (206D) is formed in the joint of the locking part (206B) and the hollow circular rotating part (206A), a locking clamping block (204) is assembled in the locking clamping groove, and a second locking knob (205) is arranged on the locking clamping block;

The end of bow member body (201) is connected in concatenation portion (206C), and the rotation of axial rotating ring drives bow member body (201) and realizes rotating, and axial sliding block (207) drive when sliding in the sliding groove that sideslips realizes bow member body (201) overall slip.

4. The brain stereotactic apparatus of claim 3, wherein:

The hollow circular rotating portion (206A) is sleeved outside the rotating shaft (207B), the locking clamping block (204) is a wedge mechanism, and the second locking knob (205) is screwed to drive the wedge mechanism to move in the locking clamping groove (206D) to clamp the rotating shaft (207B), so that the hollow circular rotating portion (206A) is locked to rotate.

5. The brain stereotactic apparatus of claim 1, wherein:

The arc arch frame assembly (2) is of a large half arc rod-shaped structure;

The probe assembly (3) is connected with the arc arch frame assembly (2) through a cylindrical sliding block (308); the probe assembly (3) can slide and can be arranged on the arc arch centering assembly (2) through 360-degree rotation of the cylindrical sliding block;

The cylindrical sliding block (308) is internally provided with an arc-shaped structure matched with the arch frame body (201), and the outer part of the cylindrical sliding block is provided with a cylindrical structure.

6. The brain stereotactic apparatus of claim 5, wherein:

The probe assembly comprises a probe base (3010), a rotating ring (307) is fixedly arranged at the lower part of the probe base (3010), and the rotating ring (307) is sleeved on the cylindrical sliding block (308);

The probe base (3010) includes a front panel and a back panel,

The front panel is provided with an assembling block (306), the assembling block is provided with an up-down moving groove (303) for installing a probe (301), needle holder clamping grooves (305) are symmetrically arranged on two sides of the up-down moving groove (303), and a needle holder structure (302) is arranged in the needle holder clamping grooves;

A needle holder locking part (310) is arranged on one side of the needle holder clamping groove;

A rotating disc (304) penetrates through the front and back panels on the base, and one surface of the rotating disc is connected with an assembling block (306);

And a rotary digital display instrument (3014) is arranged on the other surface of the rotary disc (304).

7. The brain stereotactic apparatus of claim 6, wherein:

The rotating disc (304) is provided with a probe locking mechanism (309) for locking the rotating disc (304) to rotate;

And a cylindrical sliding block locking device (3011) and a probe base locking device (3013) are respectively arranged at the joint of the rotating ring (307) and the probe base (3010).

8. The brain stereotactic apparatus of claim 7, wherein:

The locking mechanism (309) is a wedge, the cylindrical sliding block locking device (3011) and the locking device (3013) of the probe base are screws, and locking is achieved through screwing.