CN218792522U - Calibration piece and mounting device thereof - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, a marking piece and installation device thereof is disclosed. The index member includes: the head and shaft portions are calibrated. The side wall of the calibration head is circumferentially provided with a positioning groove, the positioning groove is provided with at least two positioning positions which are uniformly arranged at intervals along the circumferential direction of the calibration head, the end surface and/or the side wall of the first end of the calibration head is provided with a calibration structure, and the positioning groove and the calibration structure are arranged in a staggered manner; one end of the rod body part is a tip end, and the other end of the rod body part is connected to the end face of the second end, far away from the first end, of the calibration head part. The utility model provides a marking piece does benefit to firm and stable fixing on installation device, improves the mounted position accuracy of marking piece and the accuracy of demarcation structural position, does benefit to and improves operation efficiency, guarantees operation safety and treatment, reduces the operation cost.

Description

Calibration piece and mounting device thereof

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a marking piece and installation device thereof.

Background

In the process of performing surgical operation by the orthopedic robot, the surgical part needs to be positioned, and meanwhile, the operation execution end of the robot needs to be navigated. Before the robot performs the operation, the calibration nail is usually fixed on the bone near the operation part in advance through the mounting device, and is connected with the bone into a whole, and the top point of the calibration socket on the calibration nail is taken as a datum point for re-registration, thereby ensuring the smooth operation of the operation.

At present, mark the nail and be the metal material, adsorb on installation device through installing the strength magnets on installation device usually, the firm installation of nail can not be guaranteed to mark to magnet, the possibility of demarcating the nail slope has been increased, thereby reduce mark the nail install to patient's bone on later mark the mounted position of nail and mark the accuracy of nest position, the risk that causes secondary damage to the patient has been increased, influence operation safety and treatment, and utilize strength magnets also easily to take place mark the nail before installing to the bone and the installation device between the condition that breaks away from, influence operation efficiency, increase the operation cost.

Based on this, there is a need for a calibration piece and a mounting device thereof to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a marking piece does benefit to firmly and fixes on installation device steadily, improves the mounted position accuracy of marking piece and the accuracy of demarcation structural position, does benefit to and improves operation efficiency, guarantees operation safety and treatment, reduces the operation cost.

Another object of the utility model is to provide an installation device of marking piece realizes firmly centre gripping marking piece, does benefit to and improves operation efficiency, guarantees operation safety and treatment, and the simplified operation process improves operation efficiency, reduces the operation cost.

To achieve the purpose, the utility model adopts the following technical proposal:

an identification member, comprising:

the side wall of the calibration head is provided with positioning grooves along the circumferential direction, the positioning grooves are provided with at least two positioning positions which are uniformly arranged at intervals along the circumferential direction of the calibration head, the end face of the first end of the calibration head and/or the side wall are/is provided with calibration structures, and the positioning grooves and the calibration structures are arranged in a staggered manner;

and one end of the rod body part is a tip, and the other end of the rod body part is connected to the second end face, far away from the first end, of the calibration head part.

As an optional technical scheme of calibration piece, the calibration head is cylindric and with body of rod portion coaxial coupling, the lateral wall of calibration head includes along calibration head circumference end to end's location cambered surface and spacing plane, the central angle that the location cambered surface corresponds is greater than 180 and is less than 270, the constant head tank sets up on the location cambered surface, be provided with on the spacing plane mark the structure.

As an optional technical scheme of the calibration piece, the calibration structure is in a cone pit shape, a large end of the calibration structure is communicated with a first end face or a side wall of the calibration head, and a small end of the calibration structure is set to be a spherical surface.

As an optional technical scheme of the marking piece, the side wall of the rod body part is a rough surface;

or, a friction groove is concavely arranged on the side wall of the rod body part, and the friction groove is spirally wound along the axial direction of the rod body part;

or, a plurality of friction grooves are concavely arranged on the side wall of the rod body part, and the friction grooves are arranged at intervals along the axial direction of the rod body part.

A mounting arrangement for a target, for mounting a target as described above, the mounting arrangement comprising:

the side walls of the near end and the far end of the operating rod are respectively provided with a stopping part in a protruding way;

the sliding piece is sleeved on the operating rod in a sliding mode and can abut against the two stopping parts;

the mounting assembly comprises a mounting piece and a limiting piece, the mounting piece is connected to the far end of the operating rod, a containing hole is formed in the end face of the far end of the mounting piece, at least two through holes are uniformly formed in the hole wall of the containing hole in a circumferentially spaced mode, the limiting piece is movably arranged in each through hole, the first end of the limiting piece is located outside the mounting piece, and the limiting piece is provided with a limiting position of which the second end is located in the containing hole and an avoiding position of which the second end is withdrawn from the containing hole;

the calibration head part of the calibration piece can be arranged in the accommodating hole, when the limiting pieces are located at the limiting positions, the at least two limiting pieces can be abutted against the at least two positioning positions in a one-to-one correspondence mode so as to clamp the calibration head part and limit the calibration head part to be separated from the accommodating hole.

As an optional technical scheme of the installation device of the marking piece, the installation assembly further comprises a pushing piece, the pushing piece is sleeved outside the installation piece, the inner side wall of the pushing piece comprises a pushing inclined plane, the pushing inclined plane is gradually close to the installation piece along the direction from the far end to the near end, the first end of the limiting piece is in contact with the pushing inclined plane, and the pushing piece can slide relative to the installation piece along the axial direction so as to enable the limiting piece to be switched between the limiting position and the avoiding position.

As an optional technical solution of the installation device of the calibration piece, the installation assembly further includes a connecting member, the connecting member is connected to the installation member and at least partially located on a proximal end side of the pushing member, and the connecting member can abut against a proximal end of the pushing member; and/or the presence of a gas in the atmosphere,

the outer extension of the far-end side wall of the mounting piece is provided with a protruding part which can be abutted against the far end of the abutting piece.

As an optional technical scheme of the installation device of the marking piece, the installation component further comprises an elastic piece, a holding groove is formed in the inner wall of the pushing piece, the holding groove is located at the proximal end side of the pushing inclined plane and the proximal end of the pushing inclined plane is communicated with the pushing piece, a first step surface is formed between the distal end of the holding groove and the inner wall of the pushing piece, the elastic piece is arranged in the holding groove, one end of the elastic piece is abutted to the first step surface, and the other end of the elastic piece is abutted to the connecting piece.

As an optional technical scheme of a mounting device of the calibration piece, a plurality of anti-slip ring grooves are concavely arranged on the outer side wall of the sliding piece, and are arranged at intervals along the axial direction of the sliding piece; and/or the presence of a gas in the gas,

a plurality of strip-shaped holes are formed in the outer side wall of the sliding piece, penetrate through the inner wall and the outer wall of the sliding piece and extend along the axial direction of the sliding piece, and the strip-shaped holes are arranged at intervals along the circumferential direction of the sliding piece; and/or the presence of a gas in the gas,

the lateral wall of slider near-end and distal end all the protrusion is provided with anticreep portion, the external diameter in slider middle part department is less than the external diameter of anticreep portion.

As an optional technical scheme of the mounting device of the calibration piece, the calibration head is cylindrical and coaxially connected with the rod body part, and the side wall of the calibration head comprises a positioning arc surface and a limiting plane which are connected end to end along the circumferential direction of the calibration head;

the pore wall of accommodation hole includes follows the arc portion and the planar portion of circumference end to end of installed part, arc portion be used for with the laminating of location cambered surface, planar portion be used for with spacing plane laminates.

As an optional technical scheme of installation device of marking piece, set up threaded hole on the distal end terminal surface of action bars, the near-end of installed part is arranged in the threaded hole and with the installed part is connected, run through on the pore wall of threaded hole and seted up first spacing hole, set up the spacing hole of second on the near-end lateral wall of installed part, first spacing hole with the spacing hole of second can be just to the intercommunication, the spacer pin can pass in proper order first spacing hole with the spacing hole of second.

The utility model has the advantages that:

the utility model provides a mark piece, it is including maring head and shank portion. Be provided with the constant head tank on the demarcation head, and be equipped with two at least location position that the even interval of circumference that follows the demarcation head set up on the constant head tank, make the installation device of marking piece can pass through location position centre gripping marking piece, realize the radial positioning of demarcation head, and installation device also can block into the constant head tank, the cell wall of constant head tank can backstop installation device, the axial positioning of marking piece has been realized, make the marking piece install to the internal front of patient, can firmly be fixed by installation device, the possibility that the marking piece breaks away from installation device has been reduced, the installation position accuracy of marking piece and the accuracy of demarcation structure position have been improved, do benefit to the marking piece and realize the calibration effect, do benefit to and improve operation efficiency, operation safety and treatment are also guaranteed, the possibility that causes the secondary injury to the patient has been reduced. In addition, be provided with on the first end terminal surface and/or the lateral wall of demarcation head and mark the structure, surgical robot can be through the demarcation structure registration on first end terminal surface or the lateral wall, can make the standardization piece be adapted to and install on the bone of patient different positions, has enlarged the accommodation of standardization piece, has also reduced the demand of operation in-process to standardization piece kind simultaneously, has improved operation efficiency, also does benefit to and reduces the operation cost.

The utility model provides an installation device, be used for installing above-mentioned marking piece, it includes the action bars, slider and installation component, the holding hole of installed part can be arranged in to the mark head of marking piece, two at least locating parts can one-to-one on the marking piece two at least position location, the locating part is when spacing position and dodge to switch between the position, can realize centre gripping or release marking piece, guaranteed that the marking piece is being installed to the internal front of patient, can firmly be fixed by installation device, the possibility that the marking piece breaks away from installation device has been reduced, the mounted position accuracy of marking piece has been improved, do benefit to the marking piece and realize the demarcation effect, do benefit to and improve operation efficiency, operation safety and treatment are also guaranteed, and simultaneously, the installation of marking piece is realized with the mode of hammering through the slip of slider, the operation process among the operation process has also been simplified, operation efficiency is improved, also do benefit to the reduction operation cost. The stopping part prevents the sliding part from being separated from the operating rod, and the operation efficiency is further ensured.

Drawings

Fig. 1 is a schematic structural diagram of a calibration piece according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a marker provided in an embodiment of the present invention along a first direction;

fig. 3 is a cross-sectional view of the indicator provided by the embodiment of the present invention along a second direction;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic structural diagram of a mounting device provided in an embodiment of the present invention;

fig. 6 is a cross-sectional view of a mounting device provided by an embodiment of the present invention;

FIG. 7 is a partial enlarged view at B in FIG. 6;

fig. 8 is a schematic structural view of the mounting device and the calibration piece according to the embodiment of the present invention after assembly;

FIG. 9 is an enlarged view of a portion of FIG. 8 at C;

fig. 10 is a schematic structural diagram of a mounting member provided in an embodiment of the present invention;

fig. 11 is a schematic structural view of a pushing member according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a connecting member according to an embodiment of the present invention;

fig. 13 is a schematic structural view of an operating lever according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a sliding member according to an embodiment of the present invention.

In the figure:

10. a calibration piece; 20. mounting means;

1. calibrating the head; 11. positioning the cambered surface; 111. positioning a groove; 1111. positioning a position; 12. a limiting plane; 121. calibrating the structure;

2. a lever portion; 21. a tip; 22. rubbing the groove; 221. a first wall segment; 222. a second wall segment; 223. a connecting wall segment;

3. an operating lever; 31. a pointing slot; 32. a stopper portion; 33. a threaded hole; 331. a first limit hole;

4. a slider; 41. an anti-slip ring groove; 42. a strip-shaped hole; 43. an anti-drop part;

5. mounting the component; 51. a mounting member; 511. an accommodation hole; 5111. an arc-shaped portion; 5112. a planar portion; 512. perforating; 513. a projection; 514. a second limiting hole; 515. a threaded connection section; 516. an intermediate connection section; 517. a main shaft section; 52. a limiting member; 53. a pushing member; 531. pushing the inclined plane; 532. accommodating grooves; 5321. a first step surface; 533. an avoidance groove; 5331. a second step surface; 54. a connecting member; 541. a convex ring; 542. an operation surface; 55. an elastic member;

6. and a limiting pin.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention, and the technical effects achieved by the present invention clearer, the following detailed description will be made with reference to the accompanying drawings for further describing the technical solutions of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The present embodiment provides a scale. Specifically, as shown in fig. 1 to 4, the calibration member 10 includes a calibration head portion 1 and a rod body portion 2. The side wall of the calibration head 1 is circumferentially provided with a positioning groove 111, the positioning groove 111 is provided with at least two positioning positions 1111 which are uniformly arranged at intervals along the circumferential direction of the calibration head 1, the end surface and/or the side wall of the first end of the calibration head 1 is provided with a calibration structure 121, and the positioning groove 111 and the calibration structure 121 are arranged in a staggered manner; one end of the rod body part 2 is a tip 21, and the other end is connected to a second end face of the calibration head part 1 far away from the first end.

The present embodiment provides a calibration piece 10, which includes a calibration head 1 and a rod body 2. Be provided with constant head tank 111 on the calibration head 1, and be equipped with two at least locate position 1111 along the even interval setting of circumference of calibration head 1 on the constant head tank 111, make the installation device of calibration piece 10 pass through locate position 1111 centre gripping calibration piece 10, realize the radial positioning of calibration head 1, and installation device also can block into constant head tank 111, the cell wall of constant head tank 111 can backstop installation device, the axial positioning of calibration piece 10 has been realized, make calibration piece 10 install to the internal front of patient, can firmly be fixed by installation device, the possibility that calibration piece 10 breaks away from installation device has been reduced, the accuracy of the mounted position accuracy of calibration piece 10 and calibration structure 121 position has been improved, do benefit to calibration piece 10 and realize the calibration effect, do benefit to and improve surgical efficiency, operation safety and treatment have also been guaranteed, the possibility that causes the secondary injury to the patient has been reduced. In addition, the calibration structure 121 is arranged on the first end face and/or the side wall of the calibration head 1, and the surgical robot can be registered through the calibration structure 121 on the first end face or the side wall, so that the calibration piece 10 can be adapted to bones of different positions of a patient, the adaptation range of the calibration piece 10 is enlarged, the requirements for the types of the calibration piece 10 in the surgical process are reduced, the surgical efficiency is improved, and the surgical cost is reduced.

In fig. 2, the positioning position 1111 is indicated by a dot, and the positioning position 1111 is only indicated by a dot in order to clearly identify the position of the positioning position 1111 on the positioning groove 111. It is understood that the positioning locations 1111 may be a pit structure, a location mark, or no mark, and is not limited herein.

In this embodiment, the calibration head 1 is cylindrical, and the calibration head 1 is coaxially connected to the rod body 2. The diameter of the calibration head 1 is larger than the diameter of the shaft portion 2. The calibration head part 1 and the rod body part 2 are made of metal materials and are integrally processed and molded. In other embodiments, the connection between the calibration head 1 and the rod 2 may also be achieved by welding or the like.

In the present embodiment, the tip 21 of the shaft portion 2 may be a cone, a triangular pyramid, or a rectangular pyramid.

Preferably, the side wall of the calibration head 1 includes a positioning arc surface 11 and a limiting plane 12 which are connected end to end along the circumferential direction of the calibration head 1, the central angle corresponding to the positioning arc surface 11 is greater than 180 degrees and smaller than 270 degrees, and the positioning groove 111 is arranged on the positioning arc surface 11. Set up on the installation device and spacing plane 12 matched with plane, can confirm the installation direction of scaling piece 10, do benefit to and improve operation efficiency, also can guarantee that installation device can accurate butt on location position 1111, when the plane on the installation device is laminated with spacing plane 12, can restrict the rotation of scaling piece 10, further guaranteed that installation device can reliably centre gripping scaling piece 10, the possibility that scaling piece 10 breaks away from installation device has been reduced, the accuracy of the mounted position accuracy of scaling piece 10 and calibration structure 121 position has been improved, do benefit to scaling piece 10 and realize the calibration effect, do benefit to and improve operation efficiency, operation safety and treatment are also guaranteed. The central angle corresponding to the positioning arc surface 11 is greater than 180 degrees and less than 270 degrees, and at least two positioning positions 1111 can be uniformly arranged at intervals along the circumferential direction of the calibration head 1.

In this embodiment, the positioning groove 111 is provided with three positioning positions 1111, a central angle sandwiched between two adjacent positioning positions 1111 is 120 °, and the cross section of the positioning groove 111 is arc-shaped. In other embodiments, two, four, five, etc. positioning positions 1111 may be disposed on the positioning groove 111, and the cross section of the positioning groove 111 may have other shapes, which is not limited herein.

Preferably, the calibration structure 121 is arranged on the limiting plane 12, so that the calibration structure 121 and the positioning groove 111 are arranged in a staggered manner, and the calibration effect of the calibration structure 121 is prevented from being influenced by the intersection of the positioning groove 111 and the positioning structure 121. The calibration structure 121 is arranged on the limiting plane 12, so that the production and processing of the calibration structure 121 are facilitated.

In the present embodiment, only the positioning plane 12 is provided with the calibration structure 121. In other embodiments, the calibration structures 121 may be disposed only on the first end face of the calibration head 1, or may be disposed on both the first end face of the calibration head 1 and the limiting plane 12, which is not limited herein.

Specifically, the calibration structure 121 is in a conical pit shape, a large end of the calibration structure 121 is communicated with a first end face or a side wall of the calibration head 1, and a small end of the calibration structure 121 is set to be a spherical surface. The slope lateral wall of awl hole column structure can have the guide effect, and the target pen isotructure that sets up on the surgical robot of being convenient for contacts with the tip of demarcating structure 121, has guaranteed that mark 10 realizes the demarcation effect, does benefit to and improves operation efficiency, has also guaranteed operation safety and treatment. The central angle corresponding to the positioning arc surface 11 is greater than 180 degrees and less than 270 degrees. In the present embodiment, the taper angle of the tapered sidewall of the calibration structure 121 is not less than 50 °, and the axis of the calibration structure 121 is perpendicular to the axis of the calibration head 1. In other embodiments, the calibration structures 121 may be configured as hemispherical pits or other shapes, which are not limited herein.

In this embodiment, the concave friction groove 22 that is equipped with on the lateral wall of body of rod portion 2, friction groove 22 is around establishing along the axial spiral of body of rod portion 2, frictional force between increase body of rod portion 2 and the bone, reduce the possibility that scaling piece 10 breaks away from patient's bone and relative patient's bone removal, the accuracy of scaling piece 10 position has been guaranteed, operation safety and treatment have been guaranteed, the setting protrusion structure has also been avoided simultaneously to obstruct scaling piece 10 and has been extracted on by the bone, the possibility that causes the secondary damage to the patient has been reduced. Further, the cross section of the friction groove 22 includes a first wall section 221, a second wall section 222, and a connecting wall section 223 connected between the first wall section 221 and the second wall section 222, the first wall section 221, the second wall section 222, and the connecting wall section 223 enclose a U-shaped structure with flaring, wherein the first wall section 221 is connected to a side of the connecting wall section 223 facing the tip 21, the second wall section 222 is connected to a side of the connecting wall section 223 away from the tip 21, an edge of the first wall section 221 is inclined toward a side close to the tip 21 or the first wall section 221 extends in a radial direction of the shaft body 2, an edge of the second wall section 222 is inclined toward a side away from the tip 21, and an inclination angle of the first wall section 221 relative to the radial direction of the shaft body 2 is smaller than an inclination angle of the second wall section 222 relative to the radial direction of the shaft body 2, so that the side wall of the shaft body 2 forms a zigzag structure, which facilitates the nailing of the target 10 into the bone and prevents the target 10 from being separated from the bone.

In another embodiment, the side walls of the shaft portion 2 are roughened to increase the friction between the shaft portion 2 and the patient's bone and to reduce the likelihood of the target 10 moving away from and relative to the patient's bone. In another embodiment, a plurality of friction grooves 22 are recessed in the sidewall of the shaft portion 2, and the plurality of friction grooves 22 are spaced along the axial direction of the shaft portion 2, which also can increase the friction between the shaft portion 2 and the bone of the patient. In other embodiments, the sidewall of the rod body 2 may be provided with other structural forms, which is not limited herein.

The present embodiment also provides a mounting arrangement for a target for mounting a target 10 as described in the foregoing. Specifically, as shown in fig. 5-14, the mounting device 20 includes a lever 3, a slider 4, and a mounting assembly 5. Stop parts 32 are convexly arranged on the side walls of the near end and the far end of the operating rod 3; the sliding part 4 is slidably sleeved on the operating rod 3 and can be abutted against the two stop parts 32; the mounting assembly 5 comprises a mounting part 51 and a limiting part 52, the mounting part 51 is connected to the distal end of the operating rod 3, a receiving hole 511 is formed in the distal end face of the mounting part 51, at least two through holes 512 are uniformly arranged on the hole wall of the receiving hole 511 at intervals along the circumferential direction, a limiting part 52 is movably arranged in each through hole 512, the limiting part 52 can move along the through hole 512, the first end of the limiting part 52 is located outside the mounting part 51, and the limiting part 52 has a limiting position where the second end is located in the receiving hole 511 and an avoiding position where the second end exits the receiving hole 511; the calibration head 1 of the calibration piece 10 can be placed in the receiving hole 511, and when the limiting elements 52 are located at the limiting positions, at least two limiting elements 52 can be abutted against at least two positioning positions 1111 one by one, so as to clamp the calibration head 1 and limit the calibration head 1 from being detached from the receiving hole 511.

The mounting device 20 provided by this embodiment is used for mounting the above-mentioned marking piece 10, and includes an operation rod 3, a sliding member 4 and a mounting assembly 5, the marking head 1 of the marking piece 10 can be placed in the receiving hole 511 of the mounting member 51, at least two limiting members 52 can be one-to-one corresponding to at least two positioning positions 1111 on the marking piece 10, when the limiting members 52 are switched between the limiting positions and the avoiding positions, the marking piece 10 can be clamped or released, it is ensured that the marking piece 10 can be firmly fixed by the mounting device 20 before being mounted in the body of a patient, the possibility that the marking piece 10 is separated from the mounting device 20 is reduced, the accuracy of the mounting position of the marking piece 10 and the accuracy of the position of the marking structure 121 are improved, the marking action of the marking piece 10 is facilitated, the operation efficiency is improved, the operation safety and the treatment effect are also ensured, the possibility of causing secondary injury to the patient is reduced, meanwhile, the mounting of the marking piece 10 is realized in a hammering manner through the sliding of the sliding member 4, the operation process is also simplified, the operation efficiency is improved, and the operation cost is also facilitated to be reduced. The stopper 32 prevents the slider 4 from being detached from the operating lever 3, further ensuring the efficiency of the operation.

It should be noted that the "proximal end" and the "distal end" in the present embodiment are relative to the operator, and when the operator holds the mounting device 20, the end close to the operator is the proximal end, and the end far from the operator is the distal end. Taking the orientation of fig. 5 as an example, the right side is the proximal end of the mounting device 20 and the left side is the distal end of the mounting device 20.

It can be understood that when the calibration piece 10 needs to be installed on the bone of the patient, the calibration head 1 of the calibration piece 10 is installed in the accommodating hole 511, the limiting member 52 moves from the avoiding position to the limiting position, so that the calibration head 1 is clamped by the limiting member 52, the sliding member 4 slides relative to the operating rod 3, the stopping portion 32 located at the far end of the operating rod 3 is hammered, and the process is repeated for multiple times until the calibration piece 10 is installed in place, so that the limiting member 52 moves to the avoiding position, the calibration head 1 is separated from the installation member 51, and the installation of the calibration piece 10 is completed; when the calibration piece 10 needs to be removed from the bone of the patient, the calibration head 1 of the calibration piece 10 to be removed, which is located on the bone of the patient, is firstly installed in the receiving hole 511, the limiting member 52 moves from the avoiding position to the limiting position, so that the calibration head 1 is clamped by the limiting member 52, the sliding member 4 slides relative to the operating rod 3, the stopping portion 32 located at the proximal end of the operating rod 3 is hammered, and the process is repeated for multiple times until the calibration piece 10 is separated from the bone of the patient, and the removal of the calibration piece 10 is completed.

According to the description hereinbefore, the side wall of the calibration head 1 comprises a positioning arc surface 11 and a limit plane 12 which are connected end to end along the circumferential direction of the calibration head 1. Preferably, the hole wall of the accommodating hole 511 includes an arc portion 5111 and a flat portion 5112 which are connected end to end along the circumferential direction of the mounting member 51, the arc portion 5111 is used for being attached to the positioning arc surface 11, and the flat portion 5112 is used for being attached to the limiting plane 12. Above-mentioned structural setting, when making mark head 1 arrange the accommodation hole 511 in, arc portion 5111 can laminate with location cambered surface 11, plane portion 5112 can laminate with spacing plane 12, prevent to mark the relative installed part 51 rotation of head 1, guaranteed that locating part 52 can butt reliably on the locating position 1111 that corresponds, thereby guaranteed that installation component 5 can stabilize centre gripping mark piece 10, the mounted position accuracy of mark piece 10 and the accuracy of demarcating structure 121 position have been improved, operation safety and treatment have been guaranteed. In this embodiment, the flat portion 5112 is parallel to the axis of the mounting member 51, and the central angle of the flat portion 5112 is smaller than 120 ° and larger than 90 °.

In this embodiment, since there are three positioning positions 1111 on the calibration head 1, there are three corresponding limiting members 52. The position-limiting member 52 is disposed in a spherical shape, the first end and the second end of the position-limiting member 52 are opposite ends along the radial direction, the second end of the position-limiting member 52 faces the accommodating hole 511, and the first end of the position-limiting member 52 is opposite to the second end. The diameter of the stopper 52 is the same as the diameter of the arc-shaped cross section of the positioning groove 111. In other embodiments, the shape of the position-limiting member 52 may also be other shapes such as a column, which is not limited herein.

In the present embodiment, the mounting member 51 includes a main shaft segment 517, the main shaft segment 517 is cylindrical, the receiving hole 511 is opened on a distal end surface of the main shaft segment 517, the arc-shaped portion 5111 of the receiving hole 511 is coaxially disposed with the main shaft segment 517, an axis of the through hole 512 is perpendicular to an axis of the main shaft segment 517, and an axis of one through hole 512 is perpendicular to the plane portion 5112.

Preferably, the distal end face of the operating rod 3 is provided with a threaded hole 33, the proximal end of the mounting piece 51 is arranged in the threaded hole 33 and is in threaded connection with the operating rod 3, the hole wall of the threaded hole 33 is provided with a first limiting hole 331 in a penetrating manner, the proximal end side wall of the mounting piece 51 is provided with a second limiting hole 514, the first limiting hole 331 and the second limiting hole 514 can be communicated with each other, and the limiting pin 6 can sequentially penetrate through the first limiting hole 331 and the second limiting hole 514. Above-mentioned structural setting is convenient for realize the installation assembly between installed part 51 and the action bars 3, and the relative position of action bars 3 and installed part 51 can be restricted in setting up of spacer pin 6 moreover, prevents installed part 51 for action bars 3 pivoting, prevents that the marking piece 10 from rotating in the installation to guarantee the accuracy of marking the structure 121 position after the installation of marking piece 10, guaranteed operation safety and treatment.

Specifically, the mounting member 51 further includes a threaded connection section 515. The threaded connection section 515 is coaxially connected to the proximal end of the main shaft section 517. The outer side wall of the threaded connection section 515 is provided with an external thread, so that the threaded connection section 515 is in threaded connection with the operating rod 3 through the threaded hole 33, and the mounting assembly between the mounting piece 51 and the operating rod 3 is realized. In the present embodiment, the first limiting hole 331 is formed at the stopper portion 32, and the first limiting hole 331 penetrates the operating rod 3 and the stopper portion 32 in the radial direction. The second limit hole 514 radially penetrates the threaded connection section 515. The diameter of the first position-limiting hole 331, the diameter of the second position-limiting hole 514, and the diameter of the position-limiting pin 6 are the same. When the mounting member 51 rotates until the first position-limiting hole 331 and the second position-limiting hole 514 are communicated with each other, the position-limiting pin 6 can be inserted into the first position-limiting hole 331 and the second position-limiting hole 514.

In this embodiment, after the mounting member 51 and the operating rod 3 are assembled through the threaded hole 33 and the threaded connection section 515, the connection between the threaded connection section 515 and the threaded hole 33 is welded, so that the mounting member 51 and the operating rod 3 are prevented from being loosened when the mounting device 20 is used, and the operation safety is ensured. Further, after the limit pin 6 is inserted into the first limit hole 331 and the second limit hole 514, the limit pin 6 is also connected with the hole wall of the first limit hole 331 by welding, so as to further prevent the mounting member 51 from loosening from the operating rod 3 when the mounting device 20 is used.

Further, the mounting member 51 further includes an intermediate connection section 516. The main shaft section 517, the middle connecting section 516 and the threaded connecting section 515 are coaxially connected, and the outer diameter is gradually decreased. A step structure is formed between the middle connecting section 516 and the threaded connecting section 515, the end face of the operating rod 3 can be abutted to the step structure, the screwing-in depth of the threaded connecting section 515 is convenient to limit, and the first limiting hole 331 and the second limiting hole 514 are favorably communicated.

Preferably, the stop portion 32 at the distal end of the operating rod 3 is further provided with an orientation groove 31, and the orientation groove 31 extends along the axial direction of the mounting member 51. After the stopper pin 6 is inserted into the first stopper hole 331 and the second stopper hole 514, the groove bottom surface directed to the groove 31 and the plane portion 5112 are parallel to each other, and at the same time, the plane of the axis of the mounting member 51 and the midpoint in the width direction of the groove bottom surface is perpendicular to the plane portion 5112. That is, the positions of the plane part 5112 and the calibration structure 121 can be determined by the pointing groove 31, so that the calibration member 10 can be easily attached, and the convenience of use can be improved. The stepped structure formed between the middle connecting section 516 and the threaded connecting section 515 is also convenient to ensure the position relationship between the pointing groove 31 and the plane part 5112, and ensures the accuracy of the position of the calibration structure 121 after the calibration piece 10 is installed.

Preferably, the mounting assembly 5 further includes a pushing member 53, the pushing member 53 is annular and is sleeved outside the mounting member 51, the inner side wall of the pushing member 53 includes a pushing inclined surface 531, the pushing inclined surface 531 is gradually close to the mounting member 51 along a direction from the distal end to the proximal end, the first end of the limiting member 52 is in contact with the pushing inclined surface 531, and the pushing member 53 can slide relative to the mounting member 51 along the axial direction, so that the limiting member 52 is switched between the limiting position and the avoiding position. According to the above structure, the limiting piece 52 moves along the radial direction of the mounting piece 51 by the axial movement of the pushing inclined surface 531, so that the structure for switching the position of the limiting piece 52 is simple, the operation process is simplified, and the operation efficiency is improved. In this embodiment, the abutting inclined surface 531 is formed to surround the circumferential direction of the abutting part 53 to form a tapered surface, a taper angle corresponding to the tapered surface is not greater than 30 °, and an inner diameter of the abutting part 53 at the abutting inclined surface 531 decreases gradually from the distal end to the proximal end.

Preferably, the mounting assembly 5 further comprises a connecting member 54, the connecting member 54 is connected to the mounting member 51 and at least partially located at the proximal side of the pushing member 53, and the connecting member 54 can abut against the proximal end of the pushing member 53. The connecting piece 54 can limit the moving range of the pushing piece 53, prevent the pushing piece 53 from being separated from the mounting piece 51, facilitate the subsequent mounting of the marking piece 10 and improve the operation efficiency.

Specifically, the connecting member 54 is annular and coaxially sleeved and connected to the intermediate connecting section 516. A step structure is also formed between the intermediate connecting section 516 and the main shaft section 517, and after the connecting piece 54 is connected with the intermediate connecting section 516, the distal end face of the connecting piece can abut against the step structure formed between the intermediate connecting section 516 and the main shaft section 517, so that the connecting position of the connecting piece 54 can be limited. To avoid the connector 54 from obstructing the mounting between the mounting member 51 and the operating lever 3, the proximal end face of the connector 54 is spaced from the threaded connection section 515 when the connector 54 is in place.

Preferably, an operating surface 542 is formed on an outer side wall of the connecting member 54, and the operating surface 542 is parallel to the axial direction of the mounting member 51, so that the connecting member 54 can be mounted on the operating surface 542 by a tool such as a clamp. In this embodiment, four operation surfaces 542 are circumferentially distributed.

In this embodiment, the protruding ring 541 is disposed on the outer sidewall of the middle portion of the connecting member 54, and the proximal end of the pushing member 53 can abut against the protruding ring 541. That is, the portion of the connecting member 54 on the proximal side of the convex ring 541 can be inserted into the abutting member 53. When the proximal end of the pushing inclined surface 531 contacts the first end of the limiting member 52, the limiting member 52 is at the limiting position, and the distance between the proximal end surface of the pushing member 53 and the distal end surface of the convex ring 541 is the radius of the limiting member 52. When the distal end of the pushing inclined surface 531 contacts the first end of the limiting member 52, the limiting member 52 is in the avoiding position, and the proximal end surface of the pushing member 53 is attached to the distal end surface of the convex ring 541. In other embodiments, the pushing element 53 can also directly abut against the distal end of the connecting element 54, which is not limited herein.

In the present embodiment, the operation surface 542 is located on the proximal end side of the convex ring 541. Since the convex ring 541 is used to abut against the proximal end of the pushing member 53, the convex ring 541 is always disposed outside the pushing member 53, and the operation surface 542 is disposed on the proximal end side of the convex ring 541, which facilitates the operation of rotating the connecting member 54. In other embodiments, the operation surface 542 may be disposed at other positions, and is not limited herein.

Further, a protrusion 513 is extended from a side wall of a distal end of the main shaft section 517 of the mounting member 51, and the protrusion 513 can interfere with a distal end of the abutting member 53. The arrangement of the protruding portion 513 can further limit the moving range of the pushing member 53, prevent the pushing member 53 from being separated from the mounting member 51, further facilitate the subsequent mounting of the calibration member 10, and improve the operation efficiency. In the present embodiment, the protruding portion 513 is annularly arranged along the circumferential direction of the mounting member 51, so that the structural strength of the protruding portion 513 is ensured, and the durability of the mounting device 20 is ensured.

Preferably, the mounting assembly 5 further includes an elastic element 55, an accommodating groove 532 is formed in an inner wall of the abutting element 53, the accommodating groove 532 is located at a proximal end side of the abutting inclined surface 531, the proximal end penetrates through the abutting element 53, a first step surface 5321 is formed between a distal end of the accommodating groove 532 and the inner wall of the abutting element 53, the elastic element 55 is disposed in the accommodating groove 532, and one end of the elastic element 55 abuts against the first step surface 5321, and the other end abuts against the connecting element 54. Set up elastic component 55, do benefit to locating part 52 and reset to limiting position by dodging the position, do benefit to installation device 20 and centre gripping marking piece 10 steadily, prevent that marking piece 10 from droing, guaranteed the mounted position accuracy of marking piece 10 and mark the accuracy of structure 121 position, do benefit to and improve operation efficiency, also guaranteed operation safety and treatment, reduced the possibility that causes secondary damage to the patient.

In this embodiment, the elastic element 55 is a spring, and is sleeved on the main shaft section 517 of the mounting element 51, and is located between the pushing element 53 and the main shaft section 517. The elastic member 55 has one end abutting on the first step surface 5321 and the other end abutting on the distal end surface of the connecting member 54. Specifically, the outer thread is arranged on the far-end side wall of the intermediate connection section 516, the inner thread is arranged on the inner side wall of the near end of the connecting piece 54, the outer thread and the inner thread are in threaded connection with each other, detachable connection of the connecting piece 54 and the intermediate connection section 516 is achieved, the elastic piece 55 is convenient to install, and cleaning and disinfection of the elastic piece 55 are also convenient. In the present embodiment, the external thread is disposed on the distal end side of the male ring 541, and the axial dimension of the external thread is the same as the axial dimension of the internal thread.

Specifically, an avoiding groove 533 is formed in the inner side wall of the distal end of the abutting part 53, the avoiding groove 533 is annularly arranged along the circumferential direction of the abutting part 53, the distal end of the avoiding groove 533 penetrates through the abutting part 53, and a second step surface 5331 is formed between the proximal end of the avoiding groove 533 and the inner wall of the abutting part 53. The protruding portion 513 can be disposed in the avoiding groove 533, the outer diameter of the protruding portion 513 is the same as the inner diameter of the abutting member 53 at the avoiding groove 533, and when the proximal end of the abutting inclined surface 531 contacts with the first end of the limiting member 52, the limiting member 52 is located at the limiting position, and the proximal end surface of the protruding portion 513 abuts against the second step surface 5331. The avoiding groove 533 is arranged, so that the compact structure degree of the mounting device 20 can be improved, the size of the mounting device 20 is favorably reduced, the shielding of the visual field of a doctor is reduced, and the operation safety is ensured. In the present embodiment, the maximum inner diameter of the pushing part 53 at the pushing inclined surface 531 is smaller than the outer diameter at the protruding part 513.

Preferably, the thickness of the protruding portion 513 in the axial direction is not greater than the depth of the avoiding groove 533, and when the proximal end surface of the protruding portion 513 abuts against the second step surface 5331, the distal end surface of the protruding portion 513 is flush with the distal end surface of the abutting member 53 or the distal end surface of the protruding portion 513 is located inside the avoiding groove 533, so that the distal end of the protruding portion 513 is prevented from protruding out of the abutting member 53, and the shielding of the view of the doctor is further reduced. Preferably, the thickness of the protrusion 513 in the axial direction is the same as the groove depth of the avoiding groove 533.

Preferably, the stop 32 at the proximal end of the operating rod 3 is threadedly connected to the operating rod 3, facilitating the mounting between the slider 4 and the operating rod 3 before the stop 32 at the proximal end of the operating rod 3 is assembled with the operating rod 3. In the present embodiment, the stopper 32 at the distal end of the operating rod 3 is integrally formed with the operating rod 3, and the stopper 32 at the proximal end of the operating rod 3 is screwed to the operating rod 3. Further, after the sliding member 4 is assembled with the operating rod 3, the stopping portion 32 located at the proximal end of the operating rod 3 is welded to the connecting portion of the operating rod 3, so that the stopping portion 32 is prevented from being loosened from the operating rod 3 when the stopping portion 32 is hammered by the sliding member 4, and the operation efficiency is ensured.

In other embodiments, since the mounting member 51 is screwed with the operating rod 3, the mounting assembly between the sliding member 4 and the operating rod 3 can also be realized by screwing the stopping portion 32 at the distal end of the operating rod 3 and the operating rod 3, which is not limited herein.

Preferably, the inner diameter of the sliding member 4 is the same as the diameter of the operating rod 3, ensuring that the sliding member 4 only exerts an axial force on the index member 10, preventing the index member 10 from tilting. The distance between the end faces of the two stop portions 32 opposite to each other is not less than 1.5 times the axial length of the sliding member 4, so that the sliding member 4 has a sufficient sliding stroke, and the sliding member 4 can apply a sufficient force to the index member 10.

Preferably, the outer side wall of the sliding member 4 is spindle-shaped, and the outer diameter of the two ends is smaller than that of the middle part, so that the sliding member is convenient to hold. The outer side wall of the sliding part 4 is concavely provided with a plurality of anti-slip ring grooves 41, the plurality of anti-slip ring grooves 41 are arranged along the axial direction of the sliding part 4 at intervals, the sliding part 4 is prevented from slipping, and the installation efficiency and the operation efficiency of the marking part 10 are ensured.

Further, anti-slip parts 43 are convexly arranged on the side walls of the near end and the far end of the sliding part 4, the outer diameter of the middle part of the sliding part 4 is smaller than that of the anti-slip parts 43, the sliding part 4 can be further prevented from slipping, and the installation efficiency and the operation efficiency of the marking part 10 are further ensured.

Specifically, a plurality of bar holes 42 have been seted up on slider 4's the lateral wall, bar hole 42 link up slider 4's inner wall and outer wall and along slider 4's axial extension, a plurality of bar holes 42 set up along slider 4's circumference interval, the area of contact between slider 4 and the action bars 3 has been reduced, frictional force between slider 4 and the action bars 3 has been reduced, slider 4 has been guaranteed to slide smoothly relative to action bars 3, the installation effectiveness and the operation efficiency of mark piece 10 have been guaranteed.

In the present embodiment, the strip-shaped holes 42 are provided in four, and are evenly distributed along the circumferential direction of the slider 4.

To facilitate understanding of the mounting device 20 provided in the present embodiment, the following describes in detail the process of mounting and removing the index 10 using the mounting device 20:

when the index 10 is installed: first, the abutting member 53 is axially moved until the abutting member 53 abuts against the convex ring 541, so that the limiting member 52 is moved from the limiting position to the avoiding position. Next, the calibration head 1 of the calibration piece 10 is placed into the accommodating hole 511, the plane portion 5112 is attached to the limiting plane 12, and the arc portion 5111 is attached to the positioning arc surface 11. Next, the pushing member 53 is axially moved until the protruding portion 513 abuts against the second step surface 5331, so that the limiting member 52 is moved from the avoiding position to the limiting position. Then, the slider 4 is held and the slider 4 is axially slid, and the stopper 32 at the distal end of the operating rod 3 is hammered a plurality of times until the index 10 is mounted in place. Finally, the pushing member 53 is axially moved until the pushing member 53 abuts against the convex ring 541, so that the limiting member 52 is moved from the limiting position to the avoiding position, and the calibration head 1 is separated from the mounting member 51.

When the index 10 is removed: first, the abutting member 53 is axially moved until the abutting member 53 abuts against the convex ring 541, so that the limiting member 52 is moved from the limiting position to the avoiding position. Secondly, the calibration head 1 of the calibration piece 10 to be removed is placed into the accommodating hole 511, the plane portion 5112 is attached to the limiting plane 12, and the arc portion 5111 is attached to the positioning arc surface 11. Next, the pushing member 53 is axially moved until the protruding portion 513 abuts against the second stepped surface 5331, so that the stopper 52 is moved from the avoiding position to the limiting position. Then, the sliding member 4 is held and the sliding member 4 is axially slid, and the stopper portion 32 at the proximal end of the operating rod 3 is hammered a plurality of times until the rod body portion 2 of the index member 10 is separated from the bone of the patient. Finally, the pushing member 53 is axially moved until the pushing member 53 abuts against the convex ring 541, so that the limiting member 52 is moved from the limiting position to the avoiding position, and the calibration head 1 is separated from the mounting member 51.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (11)

1. A target, comprising:

the calibration head comprises a calibration head (1), wherein a positioning groove (111) is formed in the side wall of the calibration head (1) along the circumferential direction, at least two positioning positions (1111) are arranged on the positioning groove (111) and are uniformly arranged at intervals along the circumferential direction of the calibration head (1), a calibration structure (121) is arranged on the end face of the first end and/or the side wall of the calibration head (1), and the positioning groove (111) and the calibration structure (121) are arranged in a staggered manner;

the calibration head comprises a rod body part (2), one end of the rod body part (2) is a tip (21), and the other end of the rod body part is connected to a second end face, far away from the first end, of the calibration head part (1).

2. The calibration member according to claim 1, wherein the calibration head (1) is cylindrical and coaxially connected to the shaft portion (2), the side wall of the calibration head (1) comprises a positioning arc surface (11) and a limiting plane (12) which are connected end to end along the circumferential direction of the calibration head (1), the central angle corresponding to the positioning arc surface (11) is greater than 180 ° and less than 270 °, the positioning groove (111) is disposed on the positioning arc surface (11), and the limiting plane (12) is provided with the calibration structure (121).

3. Calibration member according to claim 1, characterized in that the calibration structure (121) is shaped as a conical crater, the large end of the calibration structure (121) communicating with the first end surface or side wall of the calibration head (1), and the small end of the calibration structure (121) being arranged as a spherical surface.

4. An indicator according to claim 1, characterized in that the side walls of the body portion (2) are roughened;

or a friction groove (22) is concavely arranged on the side wall of the rod body part (2), and the friction groove (22) is spirally wound along the axial direction of the rod body part (2);

or a plurality of friction grooves (22) are concavely arranged on the side wall of the rod body part (2), and the friction grooves (22) are arranged at intervals along the axial direction of the rod body part (2).

5. A mounting arrangement for a target, for mounting a target according to any of claims 1-4, the mounting arrangement comprising:

the operating rod (3) is provided with stop parts (32) on the side walls of the near end and the far end in a protruding manner;

the sliding piece (4) is sleeved on the operating rod (3) in a sliding mode and can abut against the two stopping parts (32);

the mounting assembly (5) comprises a mounting piece (51) and a limiting piece (52), the mounting piece (51) is connected to the far end of the operating rod (3), a receiving hole (511) is formed in the far end face of the mounting piece (51), at least two through holes (512) are formed in the hole wall of the receiving hole (511) at intervals along the circumferential direction, the limiting piece (52) is movably arranged in each through hole (512), the first end of the limiting piece (52) is located outside the mounting piece (51), and the limiting piece (52) is provided with a limiting position where the second end is located in the receiving hole (511) and an avoiding position where the second end exits the receiving hole (511);

the calibration head (1) of the calibration piece can be arranged in the accommodating hole (511), when the limiting piece (52) is located at the limiting position, at least two limiting pieces (52) can be abutted to at least two positioning positions (1111) in a one-to-one correspondence manner so as to clamp the calibration head (1) and limit the calibration head (1) to be separated from the accommodating hole (511).

6. The device for installing the calibration piece according to claim 5, wherein the installation component (5) further comprises a pushing member (53), the pushing member (53) is sleeved outside the installation member (51), an inner side wall of the pushing member (53) comprises a pushing inclined surface (531), the pushing inclined surface (531) gradually approaches the installation member (51) along a direction from a distal end to a proximal end, a first end of the limiting member (52) is in contact with the pushing inclined surface (531), and the pushing member (53) can slide relative to the installation member (51) along an axial direction to switch the limiting member (52) between the limiting position and the avoiding position.

7. Installation arrangement for a marker according to claim 6, characterized in that the installation assembly (5) further comprises a connecting piece (54), the connecting piece (54) being connected to the mounting piece (51) and being at least partly located on the proximal side of the pushing piece (53), the connecting piece (54) being capable of abutting against the proximal end of the pushing piece (53); and/or the presence of a gas in the atmosphere,

the far end side wall of the installation part (51) extends outwards to form a protruding part (513), and the protruding part (513) can be abutted against the far end of the abutting part (53).

8. The device for installing the calibration piece according to claim 7, wherein the installation assembly (5) further comprises an elastic member (55), an accommodating groove (532) is formed in an inner wall of the abutting member (53), the accommodating groove (532) is located at a proximal end side of the abutting inclined surface (531) and penetrates through the abutting member (53), a first step surface (5321) is formed between a distal end of the accommodating groove (532) and the inner wall of the abutting member (53), the elastic member (55) is disposed in the accommodating groove (532), and one end of the elastic member (55) abuts against the first step surface (5321) and the other end abuts against the connecting member (54).

9. The mounting device of the marker according to any one of claims 5-8, wherein a plurality of anti-slip ring grooves (41) are concavely arranged on the outer side wall of the sliding member (4), and the plurality of anti-slip ring grooves (41) are arranged at intervals along the axial direction of the sliding member (4); and/or the presence of a gas in the gas,

a plurality of strip-shaped holes (42) are formed in the outer side wall of the sliding part (4), the strip-shaped holes (42) penetrate through the inner wall and the outer wall of the sliding part (4) and extend along the axial direction of the sliding part (4), and the strip-shaped holes (42) are arranged at intervals along the circumferential direction of the sliding part (4); and/or the presence of a gas in the gas,

all the side walls at the near end and the far end of the sliding part (4) are convexly provided with anti-falling parts (43), and the outer diameter of the middle part of the sliding part (4) is smaller than that of the anti-falling parts (43).

10. The mounting arrangement of the index member according to any of the claims 5-8, characterized in that the index head (1) is cylindrical and is coaxially connected with the shaft portion (2), the side wall of the index head (1) comprises a positioning arc surface (11) and a limit plane (12) which are connected end to end along the circumference of the index head (1);

the pore wall of accommodation hole (511) includes along the circumference end to end's of installed part (51) arc portion (5111) and plane portion (5112), arc portion (5111) be used for with location cambered surface (11) laminating, plane portion (5112) be used for with spacing plane (12) laminating.

11. The installation device of the marking piece according to any one of claims 5 to 8, wherein a threaded hole (33) is formed on a distal end face of the operating rod (3), a proximal end of the installation piece (51) is disposed in the threaded hole (33) and connected with the installation piece (51), a first limiting hole (331) is formed through a wall of the threaded hole (33), a second limiting hole (514) is formed through a wall of a proximal end of the installation piece (51), the first limiting hole (331) and the second limiting hole (514) can be in direct communication, and a limiting pin (6) can sequentially pass through the first limiting hole (331) and the second limiting hole (514).

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