CN113599029A

CN113599029A - Pushing device

Info

Publication number: CN113599029A
Application number: CN202110843895.5A
Authority: CN
Inventors: 刘建国; 吴海源; 张勋; 张晓永; 许秀阁; 董骧
Original assignee: Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-11-05
Anticipated expiration: 2041-07-26
Also published as: CN113599029B

Abstract

The invention discloses a pusher, which comprises a connector assembly, wherein the connector assembly comprises a mounting part, hooks and a guide pin, the hooks are rotatably and detachably assembled on the mounting part, at least one pair of hooks is arranged, each pair of hooks is symmetrically arranged, the hooks can rotate between an opening position and a closing position to clamp a fusion device, the guide pin is installed on the mounting part, the guide pin can move along the axial direction of the mounting part, a connecting part used for being connected with the fusion device is arranged at the front end of the guide pin, and the guide pin is matched with the hooks to drive the hooks to be switched between the opening position and the closing position and lock the hooks in the moving process. The pusher provided by the embodiment of the invention can be used for pushing and pulling out the fusion device, is stable in connection, is not easy to fall off, and is high in practicability.

Description

Pushing device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a pusher.

Background

Some conditions resulting from thoracolumbar lesions, spondylolisthesis, trauma often require surgical treatment, while trans thoracolumbar approach surgery requires the use of a special pusher to implant the cage into the disc.

In the correlation technique, fix a position and be connected through draw-in groove and bellied form between pusher and the fusion ware, this kind of connected mode is unstable, and the fusion ware drops from the pusher easily to this kind of pusher can only carry out the propelling movement to the fusion ware, can't extract the operation, and the practicality is poor.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

To this end, embodiments of the present invention provide a pusher that can be used to push and pull a fusion device and that is stable in connection.

The pusher comprises a connector assembly used for clamping the fusion cage, the connector assembly comprises a mounting part, at least one pair of clamping hooks and a guide pin, the clamping hooks are rotatably and detachably assembled on the mounting part, each pair of clamping hooks is symmetrically arranged, the clamping hooks can rotate between an opening position and a closing position to clamp the fusion cage, the guide pin is installed on the mounting part, the guide pin can move along the axial direction of the mounting part, a connecting part used for being connected with the fusion cage is arranged at the front end of the guide pin, and the guide pin is matched with the clamping hooks to drive the clamping hooks to be switched between the opening position and the closing position and lock the clamping hooks in the moving process.

According to the pusher disclosed by the embodiment of the invention, the connecting head assembly is stably connected with the fusion cage through the clamping hook and the locking assembly, the fusion cage is difficult to fall off from the pusher, in addition, medical personnel can not only send the fusion cage into the intervertebral disc through the pusher, but also pull out the fusion cage through the pusher, so that the practicability of the pusher is greatly improved, and the success rate of an operation is improved.

In some embodiments, the mounting member is provided with a mounting hole penetrating through the mounting member, the guide pin is fitted in the mounting hole, the maximum cross-sectional area of the guide pin is smaller than that of the mounting hole, and the guide pin can be pulled out of the mounting hole after the connecting portion is connected with the fusion device.

In some embodiments, the guide pin is movable along a length direction of the mount between a first position, a second position, and a third position, the guide pin has a circumferential side with an annular protrusion, and the hook has a first protrusion and a second protrusion spaced apart along the length direction adjacent to an end of the guide pin, in the first position, the first protrusion abuts against the annular protrusion, and the hook is locked in the closed position, in the second position, the annular protrusion is located between the first protrusion and the second protrusion, and the hook is rotatable, in the third position, the annular protrusion abuts against the second protrusion, and the hook is locked in the open position.

In some embodiments, the connector assembly further includes a stopper for limiting axial movement of the guide pin.

In some embodiments, the limiting member is a ball, the ball is mounted on the mounting member and is movable in a radial direction of the mounting member, a slot is provided on the guide pin, and in the first position, the ball is clamped in the slot to limit the guide pin from moving in an axial direction thereof.

In some embodiments, the catch is located on the annular protrusion;

and/or the clamping groove is an arc-shaped groove.

In some embodiments, the connection portion includes an external thread section through which the guide pin is threadedly connected with the corresponding fusion device, and a positioning section provided at a front end of the external thread section, and a diameter of the positioning section is smaller than that of the external thread section.

In some embodiments, the pusher further comprises a pushing rod and a knob assembly, the front end of the pushing rod is connected with the connector assembly, the rear end of the pushing rod is provided with an operating end, the knob assembly is arranged on the operating end, the guide pin penetrates through the pushing rod and is connected with the knob assembly, and the knob assembly is used for driving the guide pin to rotate.

In some embodiments, the knob assembly includes a knob and a key, the knob is connected to the operation end and has a groove formed along a radial direction thereof, the key is fitted in the groove, the key is formed with a first through hole and a second through hole which are communicated with each other along a length direction thereof, the guide pin includes a first section and a second section, a cross section of the first section is circular, a cross section of the second section is strip-shaped, a shape of the first through hole corresponds to a shape of a cross section of the first section, and a shape of the second through hole corresponds to a shape of a cross section of the second section.

In some embodiments, the knob assembly is removably coupled to the push rod.

Drawings

FIG. 1 is a schematic view of a pusher according to an embodiment of the invention;

FIG. 2 is a schematic view of a coupling head assembly of a pusher according to an embodiment of the present invention;

FIG. 3 is an exploded view of a connector assembly of a pusher according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a lead of a pusher according to an embodiment of the invention;

fig. 5 is a schematic view of a catch of the presenter according to an embodiment of the present invention;

FIG. 6 is another schematic view of a connector assembly of a pusher according to an embodiment of the invention;

FIG. 7 is an enlarged partial view of the strike shown in FIG. 6;

FIG. 8 is a diagram of a lead of a pusher in a second position according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a lead of a pusher in a first position according to an embodiment of the invention;

FIG. 10 is a diagram of a lead of a pusher in a third position according to an embodiment of the present invention;

FIG. 11 is a schematic view of a knob assembly of a pusher according to an embodiment of the present invention;

figure 12 is a schematic view of a pusher according to a second embodiment of the invention;

figure 13 is a schematic view of a knob assembly of a pusher according to a second embodiment of the invention;

FIG. 14 is a sectional view A-A of FIG. 12;

figure 15 is a schematic view of a lead of a pusher according to a second embodiment of the invention.

Reference numerals:

the connector assembly 1, the mounting member 11, the hook 12, the first protrusion 121, the second protrusion 122, the guide pin 13, the annular protrusion 131, the locking groove 1311, the first section 132, the second section 133, the external thread section 134, the positioning section 135, the receding section 136, the collision bead 14, the return spring 15, the fin 16,

the guide member 2, the side fin 21, the coil 22,

the push rod 3, the operating end 32, the soft rod segment 33,

the knob assembly 4, the knob 41, the key 42, the first through hole 421, the second through hole 422,

a fusion cage 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A pusher according to an embodiment of the invention is described below with reference to the drawings.

As shown in fig. 1-15, the pusher according to an embodiment of the present invention comprises a connector assembly 1, the connector assembly 1 being used to hold a fusion device 5 for facilitating the delivery of the fusion device 5 into the intervertebral disc of a patient.

Specifically, as shown in fig. 2 and 3, the connector assembly 1 includes a mounting part 11, a hook 12 and a guide pin 13, and the mounting part 11 is a basic structure of the connector assembly 1 and is used for mounting the hook 12 and the guide pin 13.

The pothook 12 is at least a pair of, and every pair of pothook 12 is relative setting and all links to each other with installed part 11 rotatable and detachably, and two pothooks 12 are relative setting and constitute the structure similar to the clip, and two pothooks 12 are rotatable between open position and closed position, and two pothooks 12 are opened, and fuse 5 can remove to between two pothooks 12, and later two pothooks 12 are closed, can centre gripping fuse 5, makes it link to each other with connector subassembly 1.

Guide pin 13 links to each other with installed part 11, and guide pin 13 is portable along the axial of installed part 11, the front end of guide pin 13 has the connecting portion that is used for being connected with cage 5, guide pin 13 can drive pothook 12 in the removal in-process and alternate between open position and closed position, can also be with pothook 12 locking in open position or closed position, thereby, be favorable to medical personnel to centre gripping cage 5 or take off connector assembly 1 from cage 5, when pothook 12 locking is in closed position, medical personnel can send cage 5 into the intervertebral disc and extract cage 5 from the intervertebral disc through connector assembly 1, when pothook 12 locking is in open position, medical personnel can separate the pusher with cage 5.

According to the pusher provided by the embodiment of the invention, the connecting head assembly 1 is stably connected with the fusion cage 5 through the clamping hook 12, the fusion cage 5 is difficult to fall off from the pusher, medical personnel can not only send the fusion cage 5 into the intervertebral disc through the pusher, but also can pull out the fusion cage 5 by using the pusher, so that the practicability of the pusher is greatly improved, and the success rate of the operation is improved.

In some embodiments, the mounting member 11 is provided with a mounting hole extending through the mounting member 11, the mounting hole being arranged in the axial direction of the mounting member 11, and the guide pin 13 is fitted in the mounting hole and is movable along the mounting hole, thereby driving the hook 12 to switch between the open position and the closed position.

It should be noted that, the maximum cross-sectional area of the guide pin 13 is smaller than the cross-sectional area of the installation hole, so as to set the guide pin 13 to be completely inserted into the installation hole and to be removed from the installation hole, when the fusion cage 5 is pushed to the intervertebral disc by the pusher, the connection portion is connected to the fusion cage 5, at this time, the connection portion can realize the relative fixation between the guide pin 13 and the fusion cage, the two are connected to form a whole without separation, then, the mounting member 11 and the hook 12 can be separated from the guide pin 13, and the mounting member 11 and the hook 12 can be taken down along the guide pin 13, the guide pin 13 is temporarily connected to the fusion cage 5 and left on the fusion cage, so as to provide a guide path for the next operation, and when the guide pin 13 is no longer needed, the guide pin can be taken down from the fusion cage 5.

As shown in fig. 4-10, in some embodiments, the guide pin 13 is disposed through the mount 11, and the guide pin 13 is movable between a first position, a second position and a third position along the length direction of the mount 11, the guide pin 13 has a circumferential side with an annular protrusion 131, the hook 12 has a first protrusion 121 and a second protrusion 122 spaced along the length direction of the guide pin 13 at an end adjacent to the guide pin 13, and normally, the first protrusion 121 and the second protrusion 122 have a certain gap with the outer circumferential surface of the guide pin 13, so that the hook 12 can rotate at a certain angle.

When the guide pin 13 moves to the first position, the first protrusion 121 abuts against the annular protrusion 131, the guide pin 13 drives the hook 12 to move and lock at the closed position, the hook 12 cannot be opened, when the guide pin 13 moves to the second position, the annular protrusion 131 is located between the first protrusion 121 and the second protrusion 122, the first protrusion 121 and the second protrusion 122 are not in contact with the annular protrusion 131, at this time, the hook 12 can normally rotate, when the guide pin 13 moves to the third position, the annular protrusion 131 abuts against the second protrusion 122, the guide pin 13 drives the hook 12 to move and lock at the open position, and the hook cannot be closed.

In some embodiments, the guide pin 13 is provided with relief sections 136 on two sides of the annular protrusion 131, the diameter of the relief section 136 is smaller than the diameter of the annular protrusion 131, and the diameter of the relief section 136 is smaller than the diameter of the rear end of the guide pin 13, when the hook 12 moves to the second position, the annular protrusion 131 is located between the first protrusion 121 and the second protrusion 122, at this time, the first protrusion 121 and the second protrusion 122 are respectively located in the relief sections 136 on two sides of the annular protrusion 131, because the diameter of the relief section 136 is smaller, the first protrusion 121 and the second protrusion 122 are enabled to have a certain moving space, so the hook 12 can rotate a certain angle.

However, the reduction of the diameter results in the reduction of the strength of the guide pin 13, so that the length of the relief section 136 occupies only a small portion of the total length of the guide pin 13, and the diameter of the rear end of the guide pin 13 is increased appropriately to be larger than the diameter of the relief section 136, thereby ensuring the overall strength of the guide pin 13.

Further, the connector assembly 1 further includes a limiting member, the limiting member is used for limiting the axial movement of the guide pin 13 along the mounting member 11, the limiting member can limit the guide pin 13 flexibly or rigidly, the flexible limiting means can move the guide pin 13 in a manner of increasing acting force without damaging the device, and the rigid limiting means cannot move the guide pin 13 without moving the limiting member and without damaging the device.

As shown in fig. 6 and 7, the limiting member is a collision bead 14, the limit of the collision bead 14 is flexible limit, and the collision bead 14 is mature in the prior art, specifically including a sleeve, a top bead and a spring, the sleeve is installed in the installation member 11, one end of the spring is connected with the bottom end of the sleeve, the other end is connected with the top bead, the top bead is movable along the radial direction of the guide pin 13, the guide pin 13 is provided with a clamping groove 1311, the top bead is clamped in the clamping groove 1311 under the action force of the spring at the first position, at this time, the axial movement of the guide pin 13 is limited to a certain extent, the guide pin 13 cannot be moved under the condition of small stress so as to be adjusted to the second position or the second position, the clamping hook 12 is completely locked, at this time, the medical staff can use the pusher to place the fusion cage 5 into the intervertebral disc.

In the present invention, the slot 1311 is provided in an arc-shaped groove to facilitate the flexible fitting of the top bead, and in other embodiments, the slot may be provided in a triangular groove, a trapezoidal groove, or even a rectangular groove, as long as the snap-fitting of the top bead with the slot can be achieved.

In some embodiments, the annular protrusion 131 has a certain width, and the locking slot 1311 is opened on the annular protrusion 131, so that the influence of the opening of the groove on the guide pin 13 on the strength of the guide pin 13 can be further reduced. Of course, in other embodiments, the slot 1311 can be opened at other shaft portions of the guide pin.

The connecting portion of the front end of the guide pin 13 comprises an external thread section 134 and a positioning section 135 located at the front end of the external thread section, the external thread section 134 has external threads, the fusion cage 5 has internal threads corresponding to the external threads, and the guide pin 13 is in threaded connection with the fusion cage 5 through the external thread section 134. The diameter of the positioning section 135 is smaller than that of the external thread section 134, and the positioning section 135 is used for assisting in positioning the guide pin 13, and guiding the external thread section 134 to be in threaded connection with the fusion device 5.

Of course, in other embodiments, the connecting portion of the front end of the guide pin 13 may not be provided with an external thread, but may be provided with an elastic hook, and the front end of the guide pin 13 is connected to the fusion cage 5 through the elastic hook.

The practical use process of the connector assembly 1 of the invention is as follows: as shown in fig. 8 to 10, first, as shown in fig. 8, the guide pin 13 is inserted into the mounting component 11 from left to right, when the ring 131 on the guide pin starts to engage with the hook 12 in a pushing manner, the threaded hole at the right end of the cage 5 is inserted into the positioning section 135 at the front end of the guide pin 13, then the cage is pushed to right, the cage 5 drives the guide pin to move rightward, the guide pin engages with the hook 12 through the ring on the guide pin in the moving process, so as to open and close the hook 12, and the collision bead 14 engages with the slot 1311, and finally the cage is fixed on the connector assembly 1.

Then the connector assembly 1 is sent to the intervertebral disc, the fusion device 5 on the connector assembly is inserted between the intervertebral discs, then, the guide pin is rotated from the right end of the guide pin 13, the external thread section 134 at the left end of the guide pin is in threaded connection with the fusion device 5, and at the same time, the guide pin 13 is moved to the left, when the fusion cage 5 is in threaded connection, the hook 12 is driven to open, the fusion cage 5 is released, the top bead gradually escapes along the clamping groove 1311 until the guide pin 13 moves from the first position to the second position, the hook 12 is unlocked, the guide pin 13 is continuously rotated to move to the third position, the guide pin 13 is locked at the open position, the hook 12 can be separated from the fusion cage 5, the fusion cage 5 is left in the body of a patient, the guide pin 13 is temporarily connected with the fusion cage 5, a guide path can be provided for the next surgical procedure and when removal of lead 13 is desired, a forceps-like instrument can be used to unscrew it from cage 5.

As shown in fig. 4, in some embodiments, one end of the hook 12 away from the guide pin 13, that is, one end of the hook 12 contacting with the fusion cage 5, is a smooth curved surface, when the guide pin 13 is in the second position, the fusion cage 5 and the hook 12 are opposite to each other and are relatively moved, the fusion cage 5 can slide into the hook 12 along the smooth curved surface of the end of the hook 12, the hook 12 is clamped in the groove on the fusion cage 5, and the fusion cage 5 abuts against one end of the guide pin 13, so as to push the guide pin 13 from the second position to the first position, and the collision bead 14 is clamped in the clamping groove 1311, so as to lock the hook 12 in the closed position.

In some embodiments, the connector assembly 1 further includes a plurality of return springs 15, the return springs 15 are in one-to-one correspondence with the hooks 12, corresponding grooves are formed on the mounting member 11 and the hooks 12, one end of the return spring 15 is in press fit with a bottom end of the groove on the mounting member 11, the other end of the return spring 15 is in press fit with a bottom end of the groove on the hooks 12, and the return spring 15 is configured to press the hooks 12 to keep the hooks in the closed position, or to return the hooks 12 after rotating from the closed position to the clipping position.

In some embodiments, the pusher further includes a pushing rod 3 and a knob assembly 4, the front end of the pushing rod 3 is connected to the connector assembly 1, the rear end of the pushing rod 3 is provided with an operation end 32, the knob assembly 4 is disposed on the operation end 32, the guide pin 13 penetrates through the pushing rod 3 and is connected to the knob assembly 4, and the knob assembly 4 is configured to drive the guide pin 13 to rotate.

When the fusion cage 5 is pushed to the intervertebral disc, the medical staff holds the pushing rod 3 to operate through the operating end 32, and pushes the fusion cage 5 to a preset position or pulls out the fusion cage 5 through the pushing rod 3. The knob component 4 is used for driving the guide pin 13 to rotate, so as to adjust the position of the guide pin 13 and lock or unlock the hook 12, specifically, the guide pin 13 runs through the push rod and extends out from the operation end 32, the cross section of the end of the guide pin 13 can be set to be polygonal, the knob component 4 is provided with a through hole corresponding to the guide pin, and the end of the guide pin 13 is matched in the through hole so that the knob component 4 can drive the guide pin 13 to rotate.

As shown in fig. 12-15, in some embodiments, the knob assembly 4 includes a knob 41 and a key 42, the knob 41 is connected to the operation end 32, the knob 41 has a groove formed along a radial direction thereof, the key 42 is fitted in the groove and can move along a length direction of the groove, through holes for the guide pin 13 to pass through are formed on both the knob 41 and the key 42, wherein a cross section of the through hole formed on the key 42 is irregular and includes a first through hole 421 and a second through hole 422, and during the radial movement of the key 42, the first through hole 421 and the second through hole 422 sequentially pass through an axis of the knob 41 to cooperate with the guide pin 13; the lead 13 includes a first segment 132 and a second segment 133, preferably, the cross-sectional shape of the first segment 132 is circular, the cross-sectional shape of the second segment 133 is elongated, the shape of the first through hole 421 corresponds to the cross-sectional shape of the first segment 132, and the shape of the second through hole 422 corresponds to the cross-sectional shape of the second segment 133.

When the second segment 133 is located in the first through hole 421, the knob 41 is rotated and cannot drive the guide pin 13 to rotate, and when the second segment 133 is located in the second through hole 422, the key 42 is connected with the guide pin 13, and the key and the guide pin are circumferentially locked and matched, so that the knob 41 can drive the guide pin 13 to rotate, and the position of the guide pin 13 is adjusted.

Further, the knob component 4 further comprises a spring and a stop pin, the stop pin is used for preventing the key 42 from popping out of the groove, one end of the spring is connected with the bottom of the groove, the other end of the spring is connected with the key 42, in the operation process, the second section 133 is always positioned in the second through hole 422, when the pusher needs to be taken down, the key 42 is only needed to be pressed, the second section 133 is positioned in the first through hole 421, the connection relation between the guide pin 13 and the knob component 4 can be released, similarly, when the guide pin 13 is installed, the knob component 4 only needs to be moved along the guide pin 13 until the second section 133 is positioned in the first through hole 421, the key 42 is reset under the action of the spring, the second section 133 is clamped into the second through hole 422, and the guide pin 13 is connected with the rotating component.

In some embodiments, the knob assembly 4 is removably coupled to the operating end 32. So set up, when dismantling guide pin 13 from fusing ware 5, need not to use the pliers, only need to pull down knob subassembly 4 from operation end 32, link to each other knob subassembly 4 and guide pin 13 again, rotate knob 41, can dismantle guide pin 13, need not to use the pliers, easy operation has reduced the degree of difficulty of operation to a certain extent from.

Specifically, be provided with on the operation end 32 and bump the pearl, be provided with the annular groove on the outer peripheral face of knob 41, the both sides of annular groove are provided with radial recess, and the degree of depth of annular groove is greater than the degree of depth of radial recess, bumps the pearl front end card in the annular groove, realizes knob 41's smooth and easy rotation, when needs pull down knob subassembly 4, only need will bump the pearl and rotate to corresponding with radial recess, then radially extract knob subassembly 4 can.

Further, as shown in fig. 2, one end of the pushing rod 3 adjacent to the connector assembly 1 is a soft rod section 33, the soft rod section 33 can be bent at a certain angle, and the soft rod section 33 has hollow patterns, so that the soft rod section 33 can bear certain rotation, compression and stretching stress, in the operation process, the operation cannot be performed in the vertebral column shielding stage (waist 4/5) of the ilium, and the pushing device in the related art cannot be used.

As shown in fig. 12, in some embodiments, the pusher further includes a guiding component 2, the guiding component 2 includes a side wing 21 and a spiral tube 22 connected to each other, the connector component 1 is slidably connected to the side wing 21, one end of the pushing rod 3 is connected to the mounting member 11, the pushing rod 3 is in threaded connection with the spiral tube 22, when the fusion cage 5 is pushed to the intervertebral disc, a medical worker holds the spiral tube 22 and rotates the operating end 32, the operating end 32 drives the pushing rod 3 to rotate so as to drive the connector component 1 to slide along the length direction of the guiding component 2, until the fusion cage 5 is pushed to a preset position or the fusion cage 5 is pulled out.

Specifically, the connector assembly 1 further includes fins 16 disposed on two sides of the mounting member 11, the side fins 21 have sliding grooves formed along the length direction thereof, and the fins 16 are fitted in the sliding grooves and are slidable along the sliding grooves.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A pusher, comprising a connector assembly for holding a fusion device, the connector assembly comprising:

a mounting member;

the clamping hooks are rotatably and detachably assembled on the mounting part, at least one pair of clamping hooks is arranged, each pair of clamping hooks is symmetrically arranged, and the clamping hooks can rotate between an opening position and a closing position to clamp the fusion cage;

the guide pin is installed on the installation part, the guide pin can move along the axial direction of the installation part, the front end of the guide pin is provided with a connecting part used for being connected with the fusion cage, and the guide pin is matched with the clamping hook to drive the clamping hook to switch between the opening position and the closing position and lock the clamping hook in the moving process.

2. The pusher according to claim 1, wherein the mounting member is provided with a mounting hole penetrating through the mounting member, the guide pin is fitted in the mounting hole, and the maximum cross-sectional area of the guide pin is smaller than that of the mounting hole, and the guide pin can be removed from the mounting hole after the connecting portion is connected with the fusion device.

3. The pusher of claim 2, wherein the guide pin is movable along a length direction of the mounting member between a first position, a second position, and a third position, the guide pin has a circumferential protrusion, the hook has a first protrusion and a second protrusion spaced apart along the length direction thereof at an end adjacent to the guide pin, the first protrusion abuts against the annular protrusion in the first position, the hook is locked in the closed position, the annular protrusion is located between the first protrusion and the second protrusion in the second position, the hook is rotatable, the annular protrusion abuts against the second protrusion in the third position, and the hook is locked in the open position.

4. The pusher of claim 3, wherein the connector assembly further comprises a stop for limiting axial movement of the lead.

5. The pusher according to claim 4, wherein the limiting member is a ball, the ball is mounted on the mounting member and is movable in a radial direction of the mounting member, a slot is disposed on the guide pin, and in the first position, the ball is locked in the slot to limit the guide pin from moving in an axial direction thereof.

6. The pusher of claim 5, wherein the catch is located on the annular protrusion;

and/or the clamping groove is an arc-shaped groove.

7. The pusher according to claim 1, wherein the connecting portion comprises an external thread section and a positioning section provided at a front end of the external thread section, the guide pin is in threaded connection with the corresponding fusion device through the external thread section, and a diameter of the positioning section is smaller than a diameter of the external thread section.

8. The pusher according to any one of claims 1 to 7, further comprising a pushing rod and a knob assembly, wherein the front end of the pushing rod is connected to the connector assembly, the rear end of the pushing rod is provided with an operating end, the knob assembly is arranged on the operating end, the guide pin penetrates through the pushing rod and is connected to the knob assembly, and the knob assembly is used for driving the guide pin to rotate.

9. The pusher according to claim 8, wherein the knob assembly comprises a knob and a key, the knob is connected with the operating end and has a groove formed along a radial direction thereof, the key is fitted in the groove, the key is provided with a first through hole and a second through hole which are communicated with each other along a length direction thereof, the guide pin comprises a first section and a second section, a cross section of the first section is circular, a cross section of the second section is strip-shaped, a shape of the first through hole corresponds to a shape of a cross section of the first section, and a shape of the second through hole corresponds to a shape of a cross section of the second section.

10. The pusher of claim 8, wherein the knob assembly is removably coupled to the push rod.