CN113599029B

CN113599029B - Pusher device

Info

Publication number: CN113599029B
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: 2023-08-22
Anticipated expiration: 2041-07-26
Also published as: CN113599029A

Abstract

The invention discloses a pusher, which comprises a connector assembly, wherein the connector assembly comprises a mounting piece, at least one pair of hooks and a guide pin, the hooks are rotatably and detachably assembled on the mounting piece, each pair of hooks are symmetrically arranged, the hooks can rotate between an open position and a closed position to clamp a fusion device, the guide pin is mounted on the mounting piece and can move along the axial direction of the mounting piece, the front end of the guide pin is provided with a connecting part for connecting with the fusion device, and the guide pin is matched with the hooks to drive the hooks to switch between the open position and the closed position and lock the hooks in the moving process. The pusher disclosed 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 has strong practicability.

Description

Pusher device

Technical Field

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

Background

Some diseases caused by thoracolumbar pathological changes, slipping and trauma often need to be treated through operation, and the transthoracic-lumbar lateral approach operation needs to use a special pusher to implant the fusion device into the intervertebral disc.

In the related art, the pusher and the fusion device are positioned and connected through the clamping groove and the protruding mode, the connection mode is unstable, the fusion device easily falls from the pusher, the pusher can only push the fusion device, the pulling operation cannot be performed, and the practicability is poor.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

To this end, embodiments of the present invention propose a pusher that can be used to push and pull out a fusion cage, with stable connection.

The pusher comprises a connector assembly for clamping the fusion device, the connector assembly comprises a mounting piece, at least one pair of hooks and a guide pin, the hooks are rotatably and detachably assembled on the mounting piece, each pair of hooks are symmetrically arranged, the hooks can rotate between an open position and a closed position to clamp the fusion device, the guide pin is mounted on the mounting piece and can move along the axial direction of the mounting piece, the front end of the guide pin is provided with a connecting part for connecting with the fusion device, and the guide pin is matched with the hooks to drive the hooks to switch between the open position and the closed position and lock the hooks in the moving process.

According to the pusher disclosed by the embodiment of the invention, the connector assembly is stably connected with the fusion device through the clamping hook and the locking assembly, the fusion device is difficult to fall off from the pusher, in addition, medical staff can send the fusion device into the intervertebral disc through the pusher, and can pull out the fusion device by using 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 matched 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 separated from the mounting hole after the connecting part is connected with the fusion device.

In some embodiments, the guide pin is movable along the length direction of the mounting member between a first position, in which the first protrusion abuts against the annular protrusion, and a second position, in which the hook is locked in the closed position, in which the annular protrusion is located between the first protrusion and the second protrusion, in which the hook is rotatable, and a third position, in which the annular protrusion abuts against the second protrusion, in which the hook is locked in the open position, in which the hook is spaced apart along the length direction of the guide pin.

In some embodiments, the connector assembly further comprises a stop for limiting axial movement of the lead.

In some embodiments, the limiting member is a spring bead, the spring bead is mounted on the mounting member and is movable along the radial direction of the mounting member, a clamping groove is formed in the guide pin, and in the first position, the spring bead is clamped in the clamping groove to limit the guide pin to move along the axial direction of the guide pin.

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

and/or the clamping groove is an arc groove.

In some embodiments, the connecting portion comprises an external thread section and a positioning section arranged at the 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 the 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, an operation end is arranged at the rear end of the pushing rod, the knob assembly is arranged on the operation end, the guide needle penetrates through the pushing rod and is connected with the knob assembly, and the knob assembly is used for driving the guide needle to rotate.

In some embodiments, the knob assembly includes a knob and a key, the knob is connected with the operation end and has a groove formed along a radial direction of the knob, the key is matched in the groove, a first through hole and a second through hole which are mutually communicated along a length direction of the key are formed in the key, 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 bar-shaped, a shape of the first through hole corresponds to a cross section of the first section, and a shape of the second through hole corresponds to 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 diagram of a pusher according to an embodiment of the present invention;

fig. 2 is a schematic view of a connector 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 view of a pusher guide pin according to an embodiment of the present invention;

fig. 5 is a schematic view of a hook of a pusher 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 present invention;

FIG. 7 is an enlarged view of a portion of the latch bead shown in FIG. 6;

FIG. 8 is a schematic view of a pusher with a guide pin in a second position according to an embodiment of the present invention;

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

FIG. 10 is a schematic view of a pusher with a guide pin 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;

fig. 12 is a schematic view of a pusher according to a second embodiment of the present invention;

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

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

fig. 15 is a schematic view of a lead of a pusher according to a second embodiment of the present 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 clamping groove 1311, the first section 132, the second section 133, the male screw section 134, the positioning section 135, the giving-up section 136, the bump 14, the return spring 15, the fin 16,

the guide assembly 2, the side flaps 21, the coils 22,

push rod 3, operating end 32, 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 device 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 by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

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

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

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

The hooks 12 are at least one pair, each pair of hooks 12 are oppositely arranged and are rotatably and detachably connected with the mounting piece 11, the two hooks 12 are oppositely arranged to form a structure similar to a clip, the two hooks 12 can rotate between an opening position and a closing position, the two hooks 12 are opened, the fusion device 5 can be moved between the two hooks 12, and then the two hooks 12 are closed, namely the fusion device 5 can be clamped, so that the fusion device is connected with the connector assembly 1.

The guide pin 13 is connected with the mounting piece 11, the guide pin 13 is movable along the axial direction of the mounting piece 11, the front end of the guide pin 13 is provided with a connecting part for being connected with the fusion device 5, the guide pin 13 can drive the clamping hook 12 to mutually switch between an opening position and a closing position in the moving process, and the clamping hook 12 can be locked at the opening position or the closing position, so that a medical staff is facilitated to clamp the fusion device 5 or take down the connector assembly 1 from the fusion device 5, when the clamping hook 12 is locked at the closing position, the medical staff can send the fusion device 5 into an intervertebral disc through the connector assembly 1 and pull out the fusion device 5 from the intervertebral disc, and when the clamping hook 12 is locked at the opening position, the medical staff can separate the pusher from the fusion device 5.

According to the pusher disclosed by the embodiment of the invention, the connector assembly 1 is stably connected with the fusion device 5 through the clamping hook 12, the fusion device 5 is difficult to fall off from the pusher, medical staff can send the fusion device 5 into the intervertebral disc through the pusher, and can pull out the fusion device 5 by using 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 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 being fitted in and 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 guide pin 13 is smaller than the cross-sectional area of mounting hole, so set up, guide pin 13 can insert in the mounting hole completely, and can deviate from in the mounting hole, when the pusher is with fusion ware 5 propelling movement to intervertebral disc department, connecting portion links to each other with fusion ware 5, at this moment, connecting portion can realize the relative fixation between guide pin 13 and the fusion ware, the two forms an organic whole after linking to each other and can not separate, then, can separate mounting 11 and pothook 12 with guide pin 13 earlier, and take off mounting 11 and pothook 12 along guide pin 13, guide pin 13 links to each other with fusion ware 5 temporarily, stay on the fusion ware, can provide the guide path for the operation of next step, when no longer need guide pin 13, it can be taken off again from fusion ware 5.

As shown in fig. 4 to 10, in some embodiments, the guide pin 13 is disposed through the mounting member 11, and the guide pin 13 is movable along the length direction of the mounting member 11 between a first position, a second position and a third position, the guide pin 13 has an annular protrusion 131 on its peripheral side, one end of the hook 12 adjacent to the guide pin 13 has a first protrusion 121 and a second protrusion 122 spaced apart along its length direction, and normally, there is a certain gap between the first protrusion 121 and the second protrusion 122 and the outer peripheral surface of the guide pin 13, so that the hook 12 can rotate by 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 clamping hook 12 to move and lock at the closed position, the clamping 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, neither the first protrusion 121 nor the second protrusion 122 is in contact with the annular protrusion 131, at the moment, the clamping 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, and the guide pin 13 drives the clamping hook 12 to move and lock at the open position, so that the guide pin cannot be closed.

In some embodiments, the guide pin 13 is provided with a relief section 136 at two sides of the annular protrusion 131, the diameter of the relief section 136 is smaller than that of the annular protrusion 131, and the diameter of the relief section 136 is smaller than that 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, and at this time, the first protrusion 121 and the second protrusion 122 are located in the relief sections 136 at two sides of the annular protrusion 131 respectively, and the first protrusion 121 and the second protrusion 122 have a certain movable space due to the smaller diameter of the relief section 136, so that the hook 12 can rotate by a certain angle.

However, the reduction in diameter results in a reduction in the strength of the lead 13, so that the length of the relief section 136 is only a small fraction of the total length of the lead 13, while the diameter of the rear end of the lead 13 is suitably increased to be greater than the diameter of the relief section 136, thereby ensuring the overall strength of the lead 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 and rigidly, the flexible limiting means that the guide pin 13 can be moved in a force increasing manner without damage to the device, and the rigid limiting means that the guide pin 13 cannot be moved under the condition that the limiting member is not moved and is not damaged.

As shown in fig. 6 and 7, the limiting member is a bump 14, the bump 14 is limited to be flexible, and the bump 14 is mature in the prior art, and specifically includes 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, a clamping groove 1311 is formed in the guide pin 13, in the first position, the top bead is clamped in the clamping groove 1311 under the action force of the spring, at this time, the axial movement of the guide pin 13 is limited, and under the condition of small force, the guide pin 13 cannot move so as to be adjusted to the second position or the second position, the clamping hook 12 is completely locked, and at this time, a medical staff can use the pusher to put the fusion device 5 into the intervertebral disc.

In the present invention, the clamping groove 1311 is configured in the form of an arc groove so as to facilitate the flexible matching of the top bead and the top bead, and in other embodiments, the clamping groove 1311 may be configured in a triangular groove, a trapezoid groove, or even a rectangular groove, so long as the top bead can be in snap fit with the clamping groove.

In some embodiments, the annular protrusion 131 has a certain width, and the clamping groove 1311 is formed on the annular protrusion 131, so that the influence on the strength of the guide pin 13 caused by forming the groove on the guide pin 13 can be further reduced. Of course, in other embodiments, the slot 1311 may be formed in other stems of the lead.

The connecting part at the front end of the guide pin 13 comprises an external thread section 134 and a positioning section 135 positioned at the front end of the external thread section, the external thread section 134 is provided with external threads, the fusion device 5 is provided with internal threads corresponding to the external threads, and the guide pin 13 is in threaded connection with the fusion device 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 helping the guide pin 13 to position and guide the external thread section 134 to be in threaded connection with the fusion device 5.

Of course, in other embodiments, the connecting portion at the front end of the guide pin 13 may be provided with an elastic hook instead of an external thread, and the front end of the guide pin 13 is connected to the fusion device 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 member 11 from left to right, when the ring 131 on the guide pin starts to be pushed to be matched with the clamping hook 12, the threaded hole at the right end of the fusion device 5 is inserted into the positioning section 135 at the front end of the guide pin 13, then the fusion device is pushed to the right, the fusion device 5 drives the guide pin to move to the right, the guide pin is matched with the clamping hook 12 through the ring on the guide pin in the moving process, the opening and closing of the clamping hook 12 and the buckling of the collision bead 14 and the clamping groove 1311 are realized, and finally the fusion device is fixed on the connector assembly 1.

Then the connector assembly 1 is sent into the intervertebral disc, the fusion device 5 on the connector assembly is inserted between the intervertebral discs, then the guide needle is rotated from the right end of the guide needle 13, the outer thread section 134 at the left end of the guide needle is in threaded connection with the fusion device 5, meanwhile, the guide needle 13 moves leftwards, the clamping hook 12 is driven to be opened while in threaded connection with the fusion device 5, the fusion device 5 is released, the top bead gradually and outwards falls off along the clamping groove 1311 until the guide needle 13 moves from the first position to the second position, at the moment, the clamping hook 12 is unlocked, the guide needle 13 is continuously rotated to move to the third position, the guide needle 13 is locked at the open position, at the moment, the clamping hook 12 can be separated from the fusion device 5, the fusion device 5 is left in a patient, the guide needle 13 is temporarily connected with the fusion device 5, a guiding path can be provided for the next operation, and when the guide needle 13 needs to be removed, pliers instruments can be used to unscrew the fusion device 5.

As shown in fig. 4, in some embodiments, the end of the hook 12 away from the guide pin 13, that is, the end of the hook 12 contacting the fusion device 5 is a smooth curved surface, when the guide pin 13 is in the second position, the fusion device 5 and the hook 12 are opposite to each other and move relatively, the fusion device 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 device 5, and the fusion device 5 abuts against the end of the guide pin 13, so that the guide pin 13 is pushed from the second position to the first position, the collision bead 14 is clamped into the clamping groove 1311, and the hook 12 is locked 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 in the mounting piece 11 and the hooks 12, one end of each return spring 15 is in pressing fit with the bottom end of the groove in the mounting piece 11, the other end of each return spring 15 is in pressing fit with the bottom end of the groove in the hook 12, and the return springs 15 are used for pressing the hooks 12 to keep the hooks 12 in a closed position or reset the hooks 12 after rotating from the closed position to the punching 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 with the connector assembly 1, an operation end 32 is disposed at the rear end of the pushing rod 3, the knob assembly 4 is disposed on the operation end 32, the guide needle 13 penetrates the pushing rod 3 and is connected with the knob assembly 4, and the knob assembly 4 is used for driving the guide needle 13 to rotate.

When pushing the fusion device 5 to the intervertebral disc, a medical staff holds the pushing rod 3 to operate through the operation end 32, and pushes the fusion device 5 to a preset position or pulls out the fusion device 5 through the pushing rod 3. The knob assembly 4 is used for driving the guide pin 13 to rotate, so as to adjust the position of the guide pin 13 to lock or unlock the clamping hook 12, specifically, the guide pin 13 penetrates through the push rod and extends out of the operation end 32, the cross section of the end part of the guide pin 13 can be polygonal, a through hole corresponding to the cross section of the end part of the guide pin 13 is formed in the knob assembly 4, and the end part of the guide pin 13 is matched in the through hole so that the knob assembly 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, where the knob 41 is connected to the operation end 32, the knob 41 has a groove opened along a radial direction of the knob, the key 42 is fitted in the groove and can move along a length direction of the groove, through holes for the guide pins 13 to pass through are opened on the knob 41 and the key 42, and the cross section of the through hole opened on the key 42 is in an irregular shape, including a first through hole 421 and a second through hole 422, and during the radial movement process of the key 42, the first through hole 421 and the second through hole 422 sequentially pass through the axis of the knob 41 and are matched with the guide pins 13; the guide pin 13 includes a first section 132 and a second section 133, and preferably, the cross-sectional shape of the first section 132 is circular, the cross-sectional shape of the second section 133 is elongated, the shape of the first through hole 421 corresponds to the cross-sectional shape of the first section 132, and the shape of the second through hole 422 corresponds to the cross-sectional shape of the second section 133.

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

Further, the knob assembly 4 further includes a spring and a blocking pin, the blocking pin is used for preventing the button 42 from being ejected 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 button 42, in the operation process, the second section 133 is always located in the second through hole 422, when the pusher needs to be removed, the connection relationship between the guide pin 13 and the knob assembly 4 can be released by only pressing the button 42 to enable the second section 133 to be located in the first through hole 421, and similarly, when the guide pin 13 is installed, the knob assembly 4 only needs to be moved along the guide pin 13 until the second section 133 is located in the first through hole 421, the button 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 assembly.

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

Specifically, the operating end 32 is provided with a bump, the outer peripheral surface of the knob 41 is provided with an annular groove, two sides of the annular groove are provided with radial grooves, the depth of the annular groove is larger than that of the radial grooves, the front end of the bump is clamped in the annular groove, smooth rotation of the knob 41 is achieved, and when the knob assembly 4 needs to be disassembled, the bump is only required to be rotated to correspond to the radial grooves, and then the knob assembly 4 is radially pulled out.

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 is provided with hollowed-out 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 on the ilium shielding spine stage (waist 4/5), the pusher in the related art cannot be used, and the pusher according to the embodiment of the invention can be bent at a certain angle by arranging the soft rod section 33, thereby avoiding shielding to facilitate the operation of medical staff, and improving the application range of the pusher.

As shown in fig. 12, in some embodiments, the pusher further includes a guide assembly 2, the guide assembly 2 includes a side wing piece 21 and a coil 22 connected to each other, the connector assembly 1 is slidably connected to the side wing piece 21, one end of the pushing rod 3 is connected to the mounting piece 11, the pushing rod 3 is screwed to the coil 22, when pushing the fusion device 5 to the intervertebral disc, a medical staff holds the coil 22 and rotates the operating end 32, and the operating end 32 drives the pushing rod 3 to rotate so as to drive the connector assembly 1 to slide along the length direction of the guide assembly 2 until the fusion device 5 is pushed to a preset position or the fusion device 5 is pulled out.

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

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

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

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the 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 piece, at least one pair of clamping hooks are arranged, each pair of clamping hooks are symmetrically arranged, and the clamping hooks can rotate between an opening position and a closing position to clamp the fusion device;

the guide pin is arranged on the mounting piece and can move along the axial direction of the mounting piece, the front end of the guide pin is provided with a connecting part used for being connected with the fusion device, 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;

the guide pin is movable among a first position, a second position and a third position along the length direction of the mounting piece, an annular protrusion is arranged on the periphery side of the guide pin, a first protrusion and a second protrusion are arranged at intervals along the length direction of the guide pin at one end of the clamping hook adjacent to the guide pin, the first protrusion abuts against the annular protrusion in the first position, the clamping hook is locked at the closed position, the annular protrusion is located between the first protrusion and the second protrusion in the second position, the clamping hook is rotatable, the annular protrusion abuts against the second protrusion in the third position, and the clamping hook is locked at the open position.

2. The pusher of claim 1, wherein the mounting member has a mounting hole extending therethrough, the guide pin is fitted in the mounting hole, and the maximum cross-sectional area of the guide pin is smaller than the cross-sectional area of the mounting hole, and the guide pin is detachable from the mounting hole after the connecting portion is connected to the fusion device.

3. The pusher of claim 1, wherein the connector assembly further comprises a stop for limiting axial movement of the lead.

4. A pusher according to claim 3, wherein the stop member is a catch ball mounted on the mounting member and moveable in a radial direction of the mounting member, the guide pin being provided with a catch groove, the catch ball being retained in the catch groove in the first position to limit axial movement of the guide pin.

5. The pusher of claim 4, wherein the detent is located on the annular protrusion;

and/or the clamping groove is an arc groove.

6. The pusher of claim 1, wherein the connection portion comprises an external thread section and a positioning section provided at a front end of the external thread section, the guide pin is screwed 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.

7. The pusher of any one of claims 1-6, further comprising a pusher rod and a knob assembly, wherein a front end of the pusher rod is connected to the connector assembly, an operating end is disposed at a rear end of the pusher rod, the knob assembly is disposed at the operating end, the guide pin penetrates the pusher rod and is connected to the knob assembly, and the knob assembly is configured to rotate the guide pin.

8. The pusher of claim 7, 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 matched in the groove, a first through hole and a second through hole which are mutually communicated along a length direction thereof are formed in the key, the guide pin comprises a first section and a second section, the cross section of the first section is circular, the cross section of the second section is bar-shaped, the shape of the first through hole corresponds to the cross section of the first section, and the shape of the second through hole corresponds to the cross section of the second section.

9. The pusher of claim 7, wherein the knob assembly is removably coupled to the pusher bar.