CN219645977U

CN219645977U - Prosthesis imbedding device

Info

Publication number: CN219645977U
Application number: CN202320657585.9U
Authority: CN
Inventors: 周康; 唐刚; 李健; 陈德方; 刘梦星
Original assignee: Wuhan Mindray Technology Co Ltd
Current assignee: Wuhan Mindray Technology Co Ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-09-08
Anticipated expiration: 2033-03-29

Abstract

The embodiment of the application provides a prosthesis imbedding device, which belongs to the technical field of medical instruments and comprises a locking mechanism, a push rod and an actuator, wherein the locking mechanism is arranged on the actuator, the actuator is used for driving the push rod to reciprocate so as to enable the locking mechanism to switch between a locking state and an unlocking state, and the radial dimension of the locking mechanism along the push rod in the locking state is larger than that of the locking mechanism along the push rod in the unlocking state. The actuator is any one of the following: the actuator comprises a first sleeve, a first handle and a second handle, and the second handle is used for driving the push rod to reciprocate relative to the first sleeve; the actuator comprises a second sleeve, a first elastic piece and an operating device, when the locking mechanism is in a locking state, the operating device can move towards the limiting part so as to enable the locking mechanism to be switched from the locking state to the unlocking state; the actuator comprises a third sleeve which is in threaded connection with the push rod. The prosthesis imbedding device provided by the embodiment of the application can reduce the probability of deviating from the preset position.

Description

Prosthesis imbedding device

Technical Field

The application relates to the technical field of medical instruments, in particular to a prosthesis imbedding device.

Background

During performance of the relevant medical procedure, it may be necessary to place the prosthesis in a predetermined position in the human body, and when the prosthesis is placed in the predetermined position, it may be necessary to disengage the prosthesis introducer from the prosthesis. In the related art, the mounting structure on the prosthesis implanter for mounting the prosthesis makes the probability that the prosthesis implanter drives the prosthesis to deviate from the preset position in the process of separating from the prosthesis larger.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a prosthesis injector that reduces the probability of the prosthesis injector driving the prosthesis away from the predetermined position during the process of disengaging the prosthesis injector from the prosthesis.

To achieve the above object, according to a first aspect of the present utility model, there is provided a prosthesis implanter including a lock mechanism, a push rod, and an actuator, wherein the lock mechanism is provided to the actuator, the push rod is movably mounted to the actuator, the actuator is configured to drive the push rod to reciprocate so as to switch the lock mechanism between a locked state and an unlocked state, a dimension of the lock mechanism in a radial direction of the push rod in the locked state is a first dimension, a dimension of the lock mechanism in a radial direction of the push rod in the unlocked state is a second dimension, and the first dimension is larger than the second dimension;

The actuator is any one of the following actuators:

the actuator comprises a first sleeve, a first handle and a second handle, the locking mechanism is arranged at one end of the first sleeve, the first sleeve is sleeved on the push rod, the first handle is connected with the first sleeve, the second handle is rotationally connected with the first handle, the second handle penetrates through the first sleeve to be rotationally connected with the push rod in the first sleeve, and the second handle is used for driving the push rod to reciprocate relative to the first sleeve so that the locking mechanism is switched between a locking state and an unlocking state;

the actuator comprises a second sleeve, a first elastic piece and an operating device, wherein the locking mechanism is arranged at one end of the second sleeve, the second sleeve is sleeved on the push rod, the operating device is connected with one end of the push rod, which is far away from the locking mechanism, the operating device penetrates through the second sleeve along the radial direction of the push rod, a limiting part is formed on the second sleeve, the operating device is positioned at one side, which is far away from the locking mechanism, of the limiting part along the axial direction of the push rod, the first elastic piece is positioned between the limiting part and the operating device, the operating device is used for driving the push rod to reciprocate relative to the second sleeve so as to enable the locking mechanism to switch between a locking state and an unlocking state, and when the locking mechanism is in the locking state, the operating device and/or the push rod is in contact with the second sleeve along the axial direction of the push rod so as to limit the operating device to be far away from the limiting part, and the operating device can move towards the limiting part so as to enable the locking mechanism to switch from the locking state to the unlocking state.

The actuator comprises a third sleeve, the third sleeve is in threaded connection with the push rod, the locking mechanism is arranged at one end of the third sleeve, and the third sleeve is used for driving the push rod to reciprocate relative to the third sleeve through threaded transmission, so that the locking mechanism is switched between the locking state and the unlocking state.

In one embodiment, the second handle is formed with a pawl, the prosthesis implanter further comprises a rack provided to the first handle, the rack is formed with a plurality of ratchets arranged along the extending direction of the rack, and the first handle and the second handle can be close to each other so that the pawl is clamped between two adjacent ratchets.

In an embodiment, the rack is rotatably connected to the first handle, the rack is at a first rotation center relative to the rotation center of the first handle, the prosthesis implanter further comprises an elastic mechanism and a striking device, the elastic mechanism is at least partially installed on the first handle, the elastic mechanism has a rotation stopping portion, the rotation stopping portion is located at one end of the first rotation center, which is away from the pawl, in the extending direction of the rack, the rotation stopping portion can be abutted to the rack to limit the ratchet to be separated from the pawl, and the striking device is rotatably connected to the second handle to be used for striking the rack away from the pawl.

In an embodiment, the stirring device is a second rotation center relative to the rotation center of the second handle, the stirring device is provided with a stirring part and an operation part, the stirring part is positioned at one side of the second rotation center facing the pawl along the arrangement direction of the pawl and the rotation stopping part, and the operation part is positioned at one side of the second rotation center facing away from the pawl along the arrangement direction of the pawl and the rotation stopping part.

In an embodiment, the elastic mechanism includes a second elastic member and a third elastic member, the second elastic member is mounted on the first handle, the rotation stopping portion is formed on the second elastic member, the third elastic member is mounted on the second handle, the second elastic member is disposed on the third elastic member, and the elastic force of the second elastic member and the elastic force of the third elastic member are both used for enabling the first handle and the second handle to be far away from each other.

In an embodiment, the second handle is towards the one end of push rod is formed with dodges the groove, dodge the shape in groove and be rectangular shape, dodge the extending direction in groove with the axial cross arrangement of push rod, the push rod deviates from the one end of locking mechanism wear to locate dodge the groove in order to with the second handle rotates to be connected.

In an embodiment, the first handle has two first installation department of relative arrangement and is located two first district of dodging between the first installation department, two the direction of relative arrangement of first installation department with the axial cross arrangement of push rod, the second handle wears to locate first district of dodging, the second handle respectively with two first installation department rotates to be connected, the push rod deviates from one end of locking mechanism has two relative arrangement's second installation department and is located two second district of dodging between the second installation department, two the direction of relative arrangement of second installation department with the axial cross arrangement of push rod, the second handle wears to locate the second is dodged the district, the second handle respectively with two second installation department rotate to be connected.

In an embodiment, the push rod includes the execution section and connects the execution section deviates from the drive section of the one end of locking mechanism, the second handle with the drive section rotates to be connected, the diameter of drive section is greater than the diameter of execution section, first sleeve has the first chamber of holding and the second chamber of holding that communicates each other, the second holds the chamber and is located first chamber of holding deviates from one side of locking mechanism, the diameter of second holds the chamber is greater than the diameter of first chamber of holding, the execution section is located at least partially first intracavity of holding, the drive section is located the second intracavity of holding.

In an embodiment, the first sleeve comprises a main sleeve and an auxiliary sleeve, the locking mechanism is arranged at one end of the main sleeve, the auxiliary sleeve is sleeved at one end of the main sleeve, which is away from the locking mechanism, the first handle is integrally formed with the auxiliary sleeve, and the second handle is arranged on the auxiliary sleeve in a penetrating mode.

In an embodiment, be formed with the mounting hole on the telescopic section of thick bamboo wall of second, the mounting hole is located the second sleeve deviates from operating means's one end, locking mechanism movably sets up in the mounting hole, the push rod deviates from operating means's one end has switching part, the diameter of switching part is followed operating means is directional the direction of locking mechanism increases gradually, switching part is used for promoting locking mechanism is in the mounting hole removes so that locking mechanism is in locking state with the unblock state switches.

In an embodiment, the push rod has an end blocking portion, the end blocking portion is located at one end of the switching portion, which is away from the operating device, and when the locking mechanism is in the locking state, the end blocking portion abuts against the second sleeve along the axial direction of the push rod so as to limit the operating device to be away from the limiting portion.

In an embodiment, the second sleeve comprises a first sub-sleeve and a second sub-sleeve which are mutually connected, the first sub-sleeve is sleeved on the push rod, the second sub-sleeve is sleeved on the outer side of the first sub-sleeve, the locking mechanism is arranged at one end of the first sub-sleeve, the operating device penetrates through the first sub-sleeve and the second sub-sleeve along the radial direction of the push rod, the limiting part is formed in the first sub-sleeve, the second sub-sleeve is located at one side, facing the operating device, of the locking mechanism along the axial direction of the push rod, and when the locking mechanism is in a locking state, the operating device and/or the push rod is/are in butt joint with the first sub-sleeve along the axial direction of the push rod so as to limit the operating device to be away from the limiting part.

In an embodiment, the first sub-sleeve is formed with a limiting hole, the limiting hole is located at one side of the limiting portion, facing the operating device, along the axial direction of the push rod, the limiting hole and the limiting portion are arranged at intervals along the axial direction of the push rod, and the operating device is located in the limiting hole partially.

A second aspect of the present application provides a prosthesis implanter, including a locking mechanism, a push rod and an actuator, where the locking mechanism is disposed on the actuator, the push rod is movably mounted on the actuator, the actuator is configured to drive the push rod to reciprocate so as to switch the locking mechanism between a locked state and an unlocked state, a dimension of the locking mechanism in a radial direction of the push rod in the locked state is a first dimension, a dimension of the locking mechanism in the radial direction of the push rod in the unlocked state is a second dimension, and the first dimension is greater than the second dimension;

The locking mechanism is connected with the actuator, the locking mechanism has elasticity, the locking mechanism can produce elastic deformation under the effect of push rod in order to change the locking mechanism along the radial size of push rod.

In one embodiment, the locking mechanism includes a plurality of locking members connected to the actuator, and the plurality of locking members are arranged at intervals along the circumferential direction of the push rod.

In one embodiment, two adjacent locking pieces and the actuator are surrounded to form a drag reduction zone, the drag reduction zone is located at one end of the locking piece, which faces the actuator along the axial direction of the push rod, and the span of the drag reduction zone along the circumferential direction of the push rod is larger than that of two adjacent locking pieces along the circumferential direction of the push rod.

According to the prosthesis implanter disclosed by the embodiment of the application, the corresponding prosthesis can be arranged on the locking mechanism, because the first radial size of the locking mechanism is larger than the second radial size of the locking mechanism along the push rod in the unlocking state, the prosthesis implanter can be in the locking state through the locking mechanism so as to enable the locking mechanism to be in contact with the prosthesis along the radial direction of the push rod, thereby locking the prosthesis on the locking mechanism of the prosthesis implanter, the prosthesis locked on the locking mechanism is placed at a required preset position through the prosthesis implanter, when the prosthesis is placed at the preset position, the state of the locking mechanism is switched from the locking state to the unlocking state, the radial size of the locking mechanism along the push rod is reduced from the first radial size to the second radial size, during the switching process, the locking mechanism can hardly move along the axial direction of the push rod, the prosthesis implanter drives the locking mechanism to deviate from the preset position, when the locking mechanism is switched to the unlocking state, the radial size of the locking mechanism along the push rod is reduced to the second radial size, the prosthesis is separated from the locking mechanism, the prosthesis hardly contacts with the locking mechanism along the radial direction of the push rod, the prosthesis can hardly move from the preset position, and the probability of the prosthesis can hardly deviate from the preset position under the condition.

Drawings

FIG. 1 is an assembled view of a prosthesis implanter and corresponding prosthesis of an embodiment of the present application, wherein the actuator includes a first handle, a second handle, and a first sleeve;

FIG. 2 is a cross-sectional view taken at position A-A of FIG. 1;

FIG. 3 is an enlarged view at position B of FIG. 2;

fig. 4 is an enlarged view of fig. 2 at position C;

FIG. 5 is an enlarged view of the position D of FIG. 2;

FIG. 6 is an enlarged view of FIG. 2 at position E;

FIG. 7 is an assembly view of the locking mechanism, first sleeve and first handle of an embodiment of the present application;

FIG. 8 is a schematic view of the structure of a prosthetic injector of an embodiment of the present application, wherein the actuator includes a first handle, a second handle, and a first sleeve;

FIG. 9 is an enlarged view of the position F in FIG. 8;

fig. 10 is an enlarged view of position G in fig. 8;

FIG. 11 is a schematic diagram of the width of the mounting and dismounting port, the width of the connecting piece and the width of the connecting cavity according to the embodiment of the application;

FIG. 12 is a schematic diagram of the width of the first anti-slip member, the width of the second anti-slip member, and the width of the connecting chamber according to an embodiment of the present application;

FIG. 13 is an assembled view of a prosthesis implanter and corresponding prosthesis according to an embodiment of the present application, wherein the actuator includes a second sleeve, a first resilient member, and an operating means;

Fig. 14 is an enlarged view of position H in fig. 13;

FIG. 15 is a cross-sectional view taken at position I-I of FIG. 13;

FIG. 16 is an enlarged view of the location J of FIG. 15;

fig. 17 is an enlarged view of position K in fig. 15;

FIG. 18 is a schematic view of the structure of a prosthetic injector of an embodiment of the present application, wherein the actuator includes a second sleeve, a first elastic member, and an operating device;

FIG. 19 is a schematic view of the structure of a prosthetic injector of an embodiment of the present application, wherein the actuator includes a third sleeve and a handle;

fig. 20 is a cross-sectional view at a position L-L in fig. 19.

Reference numerals illustrate: a locking mechanism 1; a locking member 11; a push rod 2; a second mounting portion 21; a second avoidance zone 22; an execution section 23; a drive section 24; a switching section 25; an expansion section 26; an end stop 27; an external thread 28; an actuator 3; a first sleeve 311; a first accommodating chamber 3111; a second accommodating chamber 3112; a main sleeve 3113; a secondary sleeve 3114; a first handle 312; a first mounting portion 3121; a first avoidance zone 3122; a second handle 313; pawl 3131; the escape groove 3132; a second sleeve 321; a stopper 3211; a first sub-sleeve 3213; a limiting hole 32131; a second sub-sleeve 3214; a first elastic member 322; an operation device 323; a button 3231; a pin 3232; a third sleeve 331; an internal thread 3311; a handle 332; a rack 4; a ratchet 41; a first rotation center 42; an elastic mechanism 5; a rotation stop portion 51; a second elastic member 52; a connecting chamber 521; a detachable opening 522; a third elastic member 53; a first falling preventive piece 531; a connection piece 532; a second drop-off prevention member 533; a toggle device 6; a second rotation center 61; a toggle portion 62; an operation section 63; a drag reduction zone 7; a prosthesis 100; a connection hole 101; a ring groove 102; the prosthesis implanter 200.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments of the present application and the technical features of the embodiments may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the gist of the present application and should not be construed as unduly limiting the present application.

In view of this, an embodiment of the present application provides a prosthesis implanter, referring to fig. 1, 2, 13, 14, 15, 19 and 20, the prosthesis implanter 200 includes a locking mechanism 1, a push rod 2 and an actuator 3, the locking mechanism 1 is disposed on the actuator 3, the push rod 2 is movably mounted on the actuator 3, the actuator 3 is used for driving the push rod 2 to reciprocate so as to switch the locking mechanism 1 between a locked state and an unlocked state, a dimension of the locking mechanism 1 along a radial direction of the push rod 2 in the locked state is a first dimension, a dimension of the locking mechanism 1 along the radial direction of the push rod 2 in the unlocked state is a second dimension, and the first dimension is greater than the second dimension. In this way, the corresponding prosthesis 100 can be mounted on the locking mechanism 1, since the first dimension of the locking mechanism 1 in the radial direction is larger than the second dimension of the locking mechanism 1 in the radial direction of the push rod 2 in the unlocked state, the prosthesis implanter 200 can be in the locked state through the locking mechanism 1 so that the locking mechanism 1 is abutted with the prosthesis 100 in the radial direction of the push rod 2, thereby locking the prosthesis 100 on the locking mechanism 1 of the prosthesis implanter 200, the prosthesis 100 locked on the locking mechanism 1 is placed to a required preset position through the prosthesis implanter 200, when the prosthesis 100 is placed to the preset position, the state of the locking mechanism 1 is switched from the locked state to the unlocked state, the dimension of the locking mechanism 1 in the radial direction of the push rod 2 is reduced from the first dimension to the second dimension, during the switching process, the locking mechanism 1 can hardly move along the axial direction of the push rod 2, the probability that the prosthesis implanter 200 drives the locking mechanism 1 to deviate from the preset position is small, when the locking mechanism 1 is switched to the unlocked state, the dimension of the locking mechanism 1 in the radial direction of the push rod 2 is reduced to the second dimension, the prosthesis 100 is separated from the locking mechanism 1, the prosthesis 100 is hardly driven from the preset position of the prosthesis 100, and the probability that the prosthesis 100 can hardly deviate from the preset position 100 in the radial direction of the prosthesis 1 is reduced from the preset position.

It will be appreciated that the first dimension is greater than the second dimension, i.e. the dimension of the locking mechanism 1 in the radial direction of the push rod 2 in the locked state is greater than the dimension of the locking mechanism 1 in the radial direction of the push rod 2 in the unlocked state.

In one embodiment, the prosthesis 100 inserted by the prosthesis inserter 200 may be a femoral stem prosthesis.

In an embodiment, referring to fig. 1 and 2, the actuator 3 includes a first sleeve 311, a first handle 312 and a second handle 313, the locking mechanism 1 is disposed at one end of the first sleeve 311, the first sleeve 311 is sleeved on the push rod 2, the first handle 312 is connected with the first sleeve 311, the second handle 313 is rotatably connected with the first handle 312, and the second handle 313 is penetrating through the first sleeve 311 to be rotatably connected with the push rod 2 in the first sleeve 311. The second handle 313 is used to drive the push rod 2 to reciprocate relative to the first sleeve 311, so that the locking mechanism 1 is switched between the locked state and the unlocked state. In this structural form, since the second handle 313 is rotatably connected with the first handle 312, an operator can hold the first handle 312 and the second handle 313 by one hand and operate the second handle 313 to rotate relative to the first handle 312, and since the first handle 312 is connected with the first sleeve 311 and the second handle 313 is rotatably connected with the pushing and rotating movement, the second handle 313 rotates relative to the first handle 312 so that the second handle 313 can drive the push rod 2 to reciprocate relative to the first sleeve 311 connected with the first handle 312, thereby realizing the switching of the locking mechanism 1 between the locked state and the unlocked state, the operator can realize the state switching operation by one hand so that the operator can operate the prosthesis implanter 200 more conveniently, and the operator can hold the prosthesis conveniently through the first handle 312 and the second handle 313 to perform the state switching operation.

In one embodiment, referring to fig. 2 and fig. 6 to 9, the second handle 313 rotates relative to the first handle 312, the second handle 313 drives the push rod 2 to extend from the first sleeve 311 into the locking mechanism 1, and the locking mechanism 1 expands to a first size along the radial dimension of the push rod 2 under the action of the push rod 2, so that the locking mechanism 1 is in a locked state. The second handle 313 rotates relative to the first handle 312, the second handle 313 drives the push rod 2 to retract from the locking mechanism 1 into the first sleeve 311, the radial dimension of the locking mechanism 1 along the push rod 2 is reduced to a second dimension, and the locking mechanism 1 is in an unlocked state.

In one embodiment, referring to fig. 6, the push rod 2 moves into the locking mechanism 1 to expand the dimension of the locking mechanism 1 in the radial direction of the push rod 2, and the inner diameter of the locking mechanism 1 gradually decreases at least partially in the direction in which the first sleeve 311 is directed toward the locking mechanism 1.

In one embodiment, referring to fig. 6, the push rod 2 has an expansion portion 26, and the expansion portion 26 is configured to move into the locking mechanism 1 to expand the locking mechanism 1, so that the locking mechanism 1 swells along the radial dimension of the push rod 2. The diameter of the expansion portion 26 gradually decreases in the direction in which the first sleeve 311 is directed toward the lock mechanism 1.

In one embodiment, referring to fig. 2, and fig. 6 to 9, the locking mechanism 1 is connected to the actuator 3, the locking mechanism 1 has elasticity, and the locking mechanism 1 can be elastically deformed under the action of the push rod 2 to change the dimension of the locking mechanism 1 along the radial direction of the push rod 2. In such a structural form, the locking mechanism 1 is elastically deformed under the action of the push rod 2, so that the locking mechanism 1 expands to a first size along the radial dimension of the push rod 2, and the locking mechanism 1 is in a locking state. The push rod 2 is driven by the actuator 3 to move so as to switch the locking mechanism 1 from the locking state to the unlocking state, the elastic deformation of the locking mechanism 1 can be recovered under the action of elastic force, and the size of the locking mechanism 1 along the radial direction of the push rod 2 is reduced from the first size to the second size. Since the dimension of the locking mechanism 1 in the radial direction of the push rod 2 is actively reduced to the second dimension through the restoration of the elastic deformation, even if the elastic deformation formed by the downward portion of the locking mechanism 1 below the push rod 2 can overcome the gravity under the action of the elastic force to restore the elastic deformation, so that the contact between the locking mechanism 1 and the prosthesis 100 in the unlocking state is reduced as much as possible, and the probability of the prosthesis 100 deviating from the preset position is reduced.

In one embodiment, referring to fig. 2, and fig. 6 to 9, a locking mechanism 1 having elasticity may be connected to the first sleeve 311.

In one embodiment, the elastic locking mechanism 1 may be made of elastic metal.

In one embodiment, the elastic locking mechanism 1 may be welded or integrally formed with the first sleeve 311.

In one embodiment, referring to fig. 2, and fig. 6 to 9, the locking mechanism 1 includes a plurality of locking members 11 connected to the actuator 3, and the plurality of locking members 11 are arranged at intervals along the circumferential direction of the push rod 2. In such a structural form, the plurality of locking pieces 11 are arranged at intervals along the circumferential direction of the push rod 2, so that the resistance to elastic deformation of the whole locking mechanism 1 along the radial direction of the push rod 2 is small, and the locking mechanism 1 can smoothly generate enough elastic deformation under the action of the push rod 2 to expand the radial dimension of the locking mechanism 1 along the push rod 2 to the first dimension.

In one embodiment, referring to fig. 2, and fig. 6 to 9, two adjacent locking members 11 and the actuator 3 enclose a drag reduction region 7, the drag reduction region 7 is located at one end of the locking member 11 facing the actuator 3 along the axial direction of the push rod 2, and the span of the drag reduction region 7 along the circumferential direction of the push rod 2 is greater than the span of two adjacent locking members 11 along the circumferential direction of the push rod 2. In this way, since the span of the drag reduction region 7 in the circumferential direction of the push rod 2 is larger than the spans of the adjacent two locking pieces 11 in the circumferential direction of the push rod 2, the deformation resistance of the locking pieces 11 at the positions where they are connected to the actuator 3 is weakened, so that the locking pieces 11 can smoothly generate enough elastic deformation to expand the dimension of the lock mechanism 1 in the radial direction of the push rod 2 to the first dimension.

In one embodiment, the locking mechanism 1 may be annular in shape, and the annular shape may be a closed loop.

In one embodiment, referring to fig. 2, 4 and 5, the second handle 313 is formed with a pawl 3131, the prosthesis implanter 200 further comprises a rack 4 disposed on the first handle 312, the rack 4 is formed with a plurality of ratchet teeth 41 arranged along the extending direction of the rack 4, and the first handle 312 and the second handle 313 can be close to each other so that the pawl 3131 is caught between two adjacent ratchet teeth 41. In this manner, the first handle 312 and the second handle 313 can be moved closer to each other so that the pawl 3131 is engaged between the adjacent two ratchet teeth 41, the ratchet teeth 41 prevent the pawl 3131 from moving in the opposite direction so that the first handle 312 and the second handle 313 cannot be moved away from each other, the pawl 3131 is engaged between the adjacent two ratchet teeth 41, and the position of the second handle 313 relative to the first handle 312 can be maintained at a position at which the locking mechanism 1 is in the locked state, so that the operation of the prosthesis implanter 200 is convenient.

It should be noted that the first handle 312 and the second handle 313 are close to each other means that an end of the first handle 312 facing away from the first sleeve 311 and an end of the second handle 313 facing away from the push rod 2 are close to each other.

It should be noted that the first handle 312 and the second handle 313 are far away from each other means that an end of the first handle 312 facing away from the first sleeve 311 and an end of the second handle 313 facing away from the push rod 2 are far away from each other.

It should be noted that, the unidirectional movement of the pawl 3131 and the ratchet 41 is determined by the characteristics of the pawl 3131 and the ratchet 41, and the specific structure of the pawl 3131 and the ratchet 41 is common knowledge in the art, and will not be described again. For example, pawl 3131 mates with ratchet teeth 41 of the ratchet wheel.

In an embodiment, the positions of the first handle 312 and the second handle 313 may be locked without providing the pawl 3131 and the ratchet 41, and the first handle 312 and the second handle 313 may be kept in the locked state by the operator's continued force.

In one embodiment, referring to fig. 2, 4 and 5, the rack 4 is located at an end of the first handle 312 facing away from the first sleeve 311, the pawl 3131 is located at an end of the second handle 313 facing away from the push rod 2, and the first handle 312 and the second handle 313 are close to each other such that the pawl 3131 is clamped between two adjacent ratchet teeth 41.

In one embodiment, the rack 4 may be located at an end of the first handle 312 facing the first sleeve 311, and the pawl 3131 may be located at an end of the second handle 313 facing the push rod 2, and the first handle 312 and the second handle 313 may be close to each other such that the pawl 3131 is caught between two adjacent ratchet teeth 41.

In one embodiment, referring to fig. 2, 4 and 5, the rack 4 is rotatably connected to the first handle 312, the rack 4 has a first rotation center 42 with respect to the rotation center of the first handle 312, the prosthesis implanter 200 further includes an elastic mechanism 5 and a striking device 6, the elastic mechanism 5 is at least partially mounted on the first handle 312, the elastic mechanism 5 has a rotation stopping portion 51, the rotation stopping portion 51 is located at one end of the first rotation center 42 away from the pawl 3131 along the extending direction of the rack 4, the rotation stopping portion 51 can abut against the rack 4 to limit the ratchet 41 from being disengaged from the pawl 3131, and the striking device 6 is rotatably connected to the second handle 313 for pulling the rack 4 away from the pawl 3131. In this configuration, the first handle 312 and the second handle 313 are moved closer to each other, and the rack 4 is kept moved closer to the pawl 3131 by the elastic force applied to the rack 4 by the rotation stop portion 51 of the elastic mechanism 5, so that the pawl 3131 engaged between the adjacent two ratchet teeth 41 is prevented from being separated from the ratchet teeth 41, and the lock mechanism 1 is kept locked by the pawl 3131 and the ratchet teeth 41. When the locking mechanism 1 needs to be switched from the locked state to the unlocked state, the operator rotates the toggle device 6, the toggle device 6 pushes the rack 4 to rotate against the elastic force of the rotation stopping portion 51 so as to separate the ratchet 41 from the pawl 3131, and the operator can operate the second handle 313 to rotate relative to the first handle 312 so as to enable the second handle 313 to be far away from the first handle 312, and the second handle 313 far away from the first handle 312 drives the push rod 2 to move so as to enable the locking mechanism 1 to be switched from the locked state to the unlocked state.

In one embodiment, the rack 4 may not rotate relative to the first handle 312, the rack 4 has elasticity, and the striking device 6 strikes the rack 4 to elastically deform so as to disengage the rack 4 from the pawl 3131.

In an embodiment, referring to fig. 2 and 4, the toggle device 6 has a second rotation center 61 with respect to the rotation center of the second handle 313, the toggle device 6 has a toggle portion 62 and an operating portion 63, the toggle portion 62 is located at a side of the second rotation center 61 facing the pawl 3131 along the arrangement direction of the pawl 3131 and the rotation stop portion 51, and the operating portion 63 is located at a side of the second rotation center 61 facing away from the pawl 3131 along the arrangement direction of the pawl 3131 and the rotation stop portion 51. In such a structural form, an operator can realize the rotation of the toggle device 6 by holding the operation part 63 close to the second handle 313, so as to drive the toggle part 62 to move towards the rack 4 to toggle the rack 4 away from the pawl 3131, and the unlocking operation is more convenient.

In an embodiment, referring to fig. 2, 8 and 10, the elastic mechanism 5 includes a second elastic member 52 and a third elastic member 53, the second elastic member 52 is mounted on the first handle 312, the rotation stopping portion 51 is formed on the second elastic member 52, the third elastic member 53 is mounted on the second handle 313, the second elastic member 52 is disposed on the third elastic member 53, and the elastic force of the second elastic member 52 and the elastic force of the third elastic member 53 are used to separate the first handle 312 and the second handle 313 from each other. In this way, when the locking mechanism 1 needs to be switched from the locked state to the unlocked state, the operator rotates the toggle device 6 to toggle the rack 4 away from the pawl 3131, the elastic force of the second elastic member 52 acts on the first handle 312, the elastic force of the third elastic member 53 acts on the second handle 313, so that the first handle 312 and the second handle 313 are separated from each other under the action of the elastic force, the second handle 313 rotates relative to the first handle 312 to drive the push rod 2 to retract from the locking mechanism 1 to the first sleeve 311, the radial dimension of the locking mechanism 1 along the push rod 2 is reduced to the second dimension, and the locking mechanism 1 is switched from the locked state to the unlocked state. Since the second handle 313 and the first handle 312 are automatically pushed away from each other by the elastic force of the second elastic member 52 and the third elastic member 53 to switch the unlocking state of the locking mechanism 1, the operator does not need to apply any force for driving the second handle 313 and the first handle 312 away from each other, and the unlocking operation of the prosthesis implanter 200 is convenient.

In an embodiment, the material of the first elastic member 322 and the material of the second elastic member 52 may be elastic metals.

In an embodiment, the material of the first elastic member 322 and the material of the second elastic member 52 may be elastic plastics.

In an embodiment, the rotation stopping portion 51 of the elastic mechanism 5 is used to abut against the rack 4 to limit the ratchet 41 from being disengaged from the pawl 3131, the elastic mechanism 5 may not be provided with the second elastic member 52 and the third elastic member 53, and the operator may drive the second handle 313 to rotate relative to the first handle 312 to move the second handle 313 away from the first handle 312, so as to switch the locking mechanism 1 from the locked state to the unlocked state.

In one embodiment, referring to fig. 2, 8 and 10, the second elastic member 52 is connected to the third elastic member 53.

In one embodiment, referring to fig. 2, 4 and 8, and fig. 10 to 12, the second elastic member 52 has a connecting cavity 521 and a detachable opening 522 that are mutually communicated. The third elastic member 53 includes a first drop preventing member 531, a connecting member 532, and a second drop preventing member 533, the first drop preventing member 531, the connecting member 532, and the second drop preventing member 533 are sequentially connected, the first drop preventing member 531 is connected to the second handle 313, the connecting member 532 penetrates the connecting chamber 521, the first drop preventing member 531 is located at one side of the second elastic member 52 in the thickness direction of the second elastic member 52, and the second drop preventing member 533 is located at the other side of the second elastic member 52 in the thickness direction of the second elastic member 52. The width of the first and second drop-preventing members 531 and 533 are greater than the width of the connection chamber 521. The thickness of the third elastic member 53 is smaller than the width of the attachment/detachment opening 522, and the width of the connection member 532 is larger than the width of the attachment/detachment opening 522.

For example, referring to fig. 12, the first anti-disengagement member 531 has a width D1, the second anti-disengagement member 533 has a width D2, and the connecting cavity 521 has a width D3, D1> D3, and D2> D3.

For example, referring to fig. 4 and 11, the width of the detachable opening 522 is D6, and the thickness of the third elastic member 53 is D4, D4< D6.

For example, referring to fig. 11, the width of the detachable opening 522 is D6, and the width of the connection piece 532 is D5, D5> D6.

When the thickness direction of the third elastic member 53 is along the width direction of the mounting/dismounting opening 522, the third elastic member 53 can be moved into or out of the connection chamber 521 through the mounting/dismounting opening 522, and the second elastic member 52 and the third elastic member 53 can be mounted/dismounted relatively conveniently. When the connection piece 532 moves into the connection chamber 521, the third elastic piece 53 is rotated so that the width direction of the connection piece 532 is arranged along the width direction of the connection chamber 521, and since the width of the connection piece 532 is larger than the width of the attachment/detachment opening 522, the connection piece 532 does not exit the connection chamber 521 through the attachment/detachment opening 522, and the second elastic piece 52 is restrained between the first and second anti-release pieces 531 and 533, thereby preventing the second and third elastic pieces 52 and 53 from being released, and realizing the connection between the second and third elastic pieces 52 and 53.

In one embodiment, the second elastic member 52 and the third elastic member 53 may be integrally formed.

In an embodiment, referring to fig. 3, an avoidance groove 3132 is formed at one end of the second handle 313 facing the push rod 2, the avoidance groove 3132 is in a strip shape, the extending direction of the avoidance groove 3132 is crossed with the axial direction of the push rod 2, and one end of the push rod 2 facing away from the locking mechanism 1 is penetrated in the avoidance groove 3132 to be rotationally connected with the second handle 313. In such a structural form, in the process that the second handle 313 pushes the push rod 2 to reciprocate, the distance between the part of the push rod 2 located in the avoidance groove 3132 and the rotation center of the second handle 313 relative to the first handle 312 can be changed, the long-strip-shaped avoidance groove 3132 enables the part of the push rod 2 located in the avoidance groove 3132 to move in the avoidance groove 3132, the bending moment applied to the push rod 2 by the second handle 313 is reduced, and the push rod 2 can smoothly reciprocate in the first sleeve 311 along the axial direction of the push rod 2.

In an embodiment, referring to fig. 2, the first handle 312 has two first mounting portions 3121 disposed opposite to each other and a first avoiding area 3122 disposed between the two first mounting portions 3121, the two first mounting portions 3121 are disposed in a direction opposite to each other and cross the axial direction of the push rod 2, the second handle 313 is disposed through the first avoiding area 3122, and the second handle 313 is respectively connected to the two first mounting portions 3121 in a rotating manner. In this structural form, since the second handle 313 passes through the first avoiding area 3122 of the first handle 312, the second handle 313 is respectively rotatably connected with the two first mounting portions 3121, when the second handle 313 rotates relative to the first handle 312 to drive the push rod 2 to reciprocate, the first handle 312 applies a force to the second handle 313 relatively uniformly through the two first mounting portions 3121, which is beneficial to uniform stress of the second handle 313.

In one embodiment, the two first mounting portions 3121 are oppositely disposed in a direction perpendicular to the axial direction of the push rod 2.

In an embodiment, referring to fig. 3, one end of the push rod 2 facing away from the locking mechanism 1 is provided with two second installation portions 21 arranged oppositely and a second avoiding area 22 located between the two second installation portions 21, the two second installation portions 21 are arranged in a direction intersecting with the axial direction of the push rod 2 oppositely, a second handle 313 is arranged in the second avoiding area 22 in a penetrating manner, and the second handle 313 is respectively connected with the two second installation portions 21 in a rotating manner. In this structural form, since the second handle 313 passes through the second avoiding area 22 of the push rod 2, the second handle 313 is respectively connected with the two second mounting portions 21 in a rotating manner, when the second handle 313 rotates relative to the first handle 312, the second handle 313 rotates relative to the push rod 2 to drive the push rod 2 to reciprocate, and the second handle 313 applies a force to the two second mounting portions 21 of the push rod 2, so that the stress of the push rod 2 is relatively uniform.

The push rod 2 and the second handle 313 are stressed more uniformly, so that the push rod 2 can smoothly reciprocate in the first sleeve 311.

In one embodiment, the two second mounting portions 21 are arranged opposite to each other in a direction perpendicular to the axial direction of the push rod 2.

In one embodiment, referring to fig. 2 and 7, the push rod 2 includes an actuating section 23 and a driving section 24 connected to an end of the actuating section 23 facing away from the locking mechanism 1, the second handle 313 is rotatably connected to the driving section 24, the diameter of the driving section 24 is larger than that of the actuating section 23, the first sleeve 311 has a first accommodating cavity 3111 and a second accommodating cavity 3112 which are mutually communicated, the second accommodating cavity 3112 is located at a side of the first accommodating cavity 3111 facing away from the locking mechanism 1, the diameter of the second accommodating cavity 3112 is larger than that of the first accommodating cavity 3111, the actuating section 23 is located at least partially in the first accommodating cavity 3111, and the driving section 24 is located in the second accommodating cavity 3112. In this way, the diameter of the actuating section 24 is larger than that of the actuating section 23, the diameter of the second accommodating chamber 3112 is correspondingly larger than that of the first accommodating chamber 3111, the actuating section 23 with smaller diameter is partially located in the first accommodating chamber 3111 with smaller diameter, the first sleeve 311 has a certain guiding function on the actuating section 23 with smaller diameter located in the first accommodating chamber 3111, the actuating section 23 can move towards the locking mechanism 1 under the guiding of the first sleeve 311, and the larger diameter of the actuating section 24 enables the actuating section 24 of the push rod 2 to have better strength and rigidity, so that the second handle 313 is favorable for driving the push rod 2 to move better.

In one embodiment, referring to fig. 2 and 3, the second mounting portion 21 and the second avoiding area 22 are both formed on the driving section 24.

In one embodiment, referring to fig. 2 and 6, the expansion portion 26 is formed in the actuating section 23.

In one embodiment, the diameters of the push rod 2 at the respective positions in the axial direction of the push rod 2 may be equal.

In an embodiment, referring to fig. 2, 3 and 7, the first sleeve 311 includes a main sleeve 3113 and an auxiliary sleeve 3114, the locking mechanism 1 is disposed at one end of the main sleeve 3113, the auxiliary sleeve 3114 is sleeved at one end of the main sleeve 3113 deviating from the locking mechanism 1, the first handle 312 and the auxiliary sleeve 3114 are integrally formed, and the second handle 313 is disposed through the auxiliary sleeve 3114. In this configuration, since the first handle 312 and the sub-sleeve 3114 are integrally formed, unnecessary attachment and detachment between the first handle 312 and the sub-sleeve 3114 can be reduced. The auxiliary sleeve 3114 is sleeved at one end of the main sleeve 3113, which is far away from the locking mechanism 1, the main sleeve 3113, the auxiliary sleeve 3114 and the first handle 312 which are integrally formed can be manufactured separately, the main sleeve 3113 which is manufactured separately is simple in structure and regular in shape, and the shape of the first handle 312 does not need to be considered in the blanking manufacturing process of the main sleeve 3113, so that fewer raw materials are needed for manufacturing the first sleeve 311 and the first handle 312 integrally, and cost saving is facilitated.

In one embodiment, referring to fig. 7, a first receiving cavity 3111 and a second receiving cavity 3112 are formed in a main sleeve 3113.

In one embodiment, the first sleeve 311 and the first handle 312 may be integrally formed. The first sleeve 311 is not subdivided into two separable parts.

In one embodiment, referring to fig. 13 to 18, the actuator 3 includes a second sleeve 321, a first elastic member 322, and an operating device 323. The locking mechanism 1 is arranged at one end of the second sleeve 321, the second sleeve 321 is sleeved on the push rod 2, the operating device 323 is connected with one end of the push rod 2, deviating from the locking mechanism 1, the operating device 323 penetrates through the second sleeve 321 along the radial direction of the push rod 2, the second sleeve 321 is provided with a limiting portion 3211, the operating device 323 is located at one side, deviating from the locking mechanism 1, of the limiting portion 3211 along the axial direction of the push rod 2, the first elastic piece 322 is located between the limiting portion 3211 and the operating device 323, the operating device 323 is used for driving the push rod 2 to reciprocate relative to the second sleeve 321 so as to enable the locking mechanism 1 to be switched between a locking state and an unlocking state, when the locking mechanism 1 is in the locking state, the operating device 323 and/or the push rod 2 is/are/is in butt joint with the second sleeve 321 along the axial direction of the push rod 2 so as to limit the operating device 323 to deviate from the limiting portion 3211, and the operating device 323 can move towards the limiting portion 3211 so as to enable the locking mechanism 1 to be switched from the locking state to the unlocking state. In this way, the first elastic member 322 applies a force to the operating device 323 to push the operating device 323 away from the limiting portion 3211, and in the locked state, since the operating device 323 and/or the push rod 2 is in abutment with the second sleeve 321, the second sleeve 321 applies a reaction force to the operating device 323 and/or the push rod 2 to balance with the elastic force of the first elastic member 322, the elastic force of the first elastic member 322 cannot push the operating device 323 away from the limiting portion 3211 any more, and the operating device 323 cannot drive the push rod 2 to move any more without an external force, so that the push rod 2 is kept in a position where the locking mechanism 1 is in the locked state. The locking mechanism 1 is kept in the locked state by the elastic force of the first elastic member 322 and the reaction force of the second sleeve 321, and the operation is convenient without the continuous application of force by an operator to maintain the locked state during the process of placing the prosthesis 100 through the prosthesis implanter 200. Furthermore, when the locking mechanism 1 needs to be switched from the locked state to the unlocked state, an external force may be applied to the operation device 323 to push the operation device 323 against the elastic force of the first elastic member 322 toward the limit portion 3211, the operation device 323 moves toward the limit portion 3211 to switch the locking mechanism 1 from the locked state to the unlocked state, the locking mechanism 1 is disengaged from the corresponding prosthesis 100 in the unlocked state to disengage the prosthesis injector 200 from the prosthesis 100, and the process of disengaging the prosthesis injector 200 from the prosthesis 100 is relatively short, i.e., the operator can disengage the prosthesis injector 200 from the prosthesis 100 by briefly maintaining the unlocked state of the locking mechanism 1. Therefore, the locked state of the lock mechanism 1 is maintained by the urging force of the first elastic member 322 and the reaction force of the second sleeve 321, and the unlocked state of the lock mechanism 1 is temporarily maintained by the application of an external force by the operator, so that on the one hand, the switching between the locked state and the unlocked state can be preferably realized, and on the other hand, the second sleeve 321 may have an abutment position for maintaining the locked state, and the second sleeve 321 does not need to be provided with an abutment position for maintaining the unlocked state, thereby facilitating the simplification of the structure of the second sleeve 321.

In an embodiment, the operating device 323 abuts against the second sleeve 321 along the axial direction of the push rod 2 to limit the operating device 323 from moving away from the limiting portion 3211.

In an embodiment, the push rod 2 abuts against the second sleeve 321 along the axial direction of the push rod 2 to limit the operating device 323 from moving away from the limiting portion 3211.

In an embodiment, the operating device 323 and the push rod 2 are both abutted with the second sleeve 321 along the axial direction of the push rod 2 to limit the operating device 323 from moving away from the limiting portion 3211

In one embodiment, referring to fig. 16, the operating device 323 includes a button 3231 and a pin 3232, the pin 3232 penetrates the push rod 2, the button 3231 is connected to the pin 3232, and the button 3231 is partially located outside the second sleeve 321. The first elastic member 322 is respectively abutted against the limiting portion 3211 and the button 3231, and the elastic force of the first elastic member 322 is used for pushing the button 3231 to move. The operator applies an external force to the button 3231 partially exposed from the second sleeve 321 to move the button 3231 toward the stopper portion 3211 against the elastic force of the first elastic member 322.

In one embodiment, the first elastic member 322 may be a spring.

In an embodiment, referring to fig. 17, a mounting hole is formed on a wall of the second sleeve 321, the mounting hole is located at an end of the second sleeve 321 away from the operating device 323, the locking mechanism 1 is movably disposed in the mounting hole, an end of the push rod 2 away from the operating device 323 is provided with a switching portion 25, a diameter of the switching portion 25 gradually increases along a direction that the operating device 323 points to the locking mechanism 1, and the switching portion 25 is used for pushing the locking mechanism 1 to move in the mounting hole so as to switch the locking mechanism 1 between a locked state and an unlocked state. In this structural form, when the operating device 323 is far away from the limiting portion 3211 under the action of the elastic force of the first elastic member 322, the operating device 323 drives the push rod 2 to move along the direction in which the limiting portion 3211 points to the operating device 323, and the switching portion 25 of the push rod 2 correspondingly moves, as the diameter of the switching portion 25 gradually increases along the direction in which the operating device 323 points to the locking mechanism 1, along with the movement of the switching portion 25, the diameter of the switching portion 25 at the position corresponding to the mounting hole gradually increases to eject the locking mechanism 1 out of the mounting hole, so that the locking mechanism 1 is switched to the locking state. When the operating device 323 moves towards the limiting portion 3211 under the action of an external force of an operator, the operating device 323 drives the push rod 2 to move along the direction of the operating device 323 pointing to the limiting portion 3211, the switching portion 25 of the push rod 2 correspondingly moves, and as the diameter of the switching portion 25 gradually increases along the direction of the operating device 323 pointing to the locking mechanism 1, along with the movement of the switching portion 25, the diameter of the switching portion 25 at the position corresponding to the mounting hole gradually decreases, and the locking mechanism 1 cannot be ejected out of the mounting hole under the action of the switching portion 25, so that the locking mechanism 1 is switched to an unlocking state.

In one embodiment, referring to fig. 17, the locking mechanism 1 movably disposed in the mounting hole is a steel ball.

In an embodiment, the number of the steel balls may be plural, and the plural steel balls are arranged at intervals along the circumferential direction of the push rod 2.

The term "plurality" means two or more.

It will be appreciated that the number of steel balls is not limited. In one embodiment, the number of steel balls may be one.

In an embodiment, referring to fig. 15 and 17, the push rod 2 has an end blocking portion 27, the end blocking portion 27 is located at an end of the switching portion 25 away from the operating device 323, the locking mechanism 1 is in a locked state, and the end blocking portion 27 abuts against the second sleeve 321 along an axial direction of the push rod 2 to limit the operating device 323 from being away from the limiting portion 3211. In this configuration, the end stopper 27 abuts against the second sleeve 321, and the reaction force of the second sleeve 321 is applied to the end stopper 27 of the push rod 2 to balance the elastic force of the first elastic member 322 applied to the push rod 2 by the operation device 323, thereby holding the lock mechanism 1 in the locked state. Since the end stop 27 is located at the end of the switching portion 25 away from the operating device 323, the end stop 27 is closer to the switching portion 25, and the switching portion 25 can be controlled to a position corresponding to the locked state of the lock mechanism 1 more accurately by the end stop 27.

In one embodiment, when the lock mechanism 1 is in the locked state, the operating device 323 abuts against the second sleeve 321 on a side of the push rod 2 facing away from the lock mechanism 1 in the axial direction.

In one embodiment, the prosthesis 100 is formed with a connection hole 101 and a ring groove 102 in the connection hole 101, the ring groove 102 being configured to receive the locking mechanism 1 that moves in or out of the installation hole, and the locking mechanism 1 being located in the ring groove 102 when the prosthesis 100 is installed in the locking mechanism 1 in the locked state. The locking mechanism 1, which is configured to more securely mount the prosthesis 100 to the prosthesis implanter 200 by extending the locking mechanism 1 into the circumferential groove 102 of the prosthesis 100, facilitates more accurate placement of the prosthesis 100 into a predetermined position by the prosthesis implanter 200.

It will be appreciated that since the circumferential groove 102 is within the attachment hole 101, it is difficult to accurately grasp the position of the circumferential groove 102 with respect to the locking mechanism 1 during the process of mounting the prosthesis 100 to the locking mechanism 1. In view of this, in an embodiment, referring to fig. 13 to 17, the second sleeve 321 includes a first sub-sleeve 3213 and a second sub-sleeve 3214 that are connected to each other, the first sub-sleeve 3213 is sleeved on the push rod 2, the second sub-sleeve 3214 is sleeved on the outer side of the first sub-sleeve 3213, the locking mechanism 1 is disposed at one end of the first sub-sleeve 3213, the operating device 323 is penetrated through the first sub-sleeve 3213 and the second sub-sleeve 3214 along the radial direction of the push rod 2, the limiting portion 3211 is formed on the first sub-sleeve 3213, the second sub-sleeve 3214 is located on a side of the locking mechanism 1 facing the operating device 323 along the axial direction of the push rod 2, and when the locking mechanism 1 is in the locked state, the operating device 323 and/or the push rod 2 is abutted against the first sub-sleeve 3213 along the axial direction of the push rod 2 to limit the operating device 323 from being far away from the limiting portion 3211. In this configuration, the locking mechanism 1 is provided at one end of the first sub-sleeve 3213, and during the process of mounting the prosthesis 100 to the prosthesis implanter 200, the prosthesis 100 is sleeved at the first sub-sleeve 3213 from one end of the first sub-sleeve 3213 facing away from the operation device 323 so that the first sub-sleeve 3213 extends into the attachment hole 101 of the prosthesis 100, and since the second sub-sleeve 3214 is sleeved outside the first sub-sleeve 3213, the second sub-sleeve 3214 is located on the side of the locking mechanism 1 facing the operation device 323 in the axial direction of the push rod 2, and the end of the second sub-sleeve 3214 facing the one end of the locking mechanism 1 in the axial direction of the push rod 2 can abut against the prosthesis 100 in the axial direction of the push rod 2, thereby providing a certain positioning function to the prosthesis 100, and when the second sub-sleeve 3214 abuts against the prosthesis 100, the ring groove 102 of the prosthesis 100 is located at a position substantially corresponding to the attachment hole, the locking mechanism 1 in the locked state can extend from the attachment hole into the ring groove 102 of the prosthesis 100, thereby providing a relatively firm mounting of the prosthesis 100 to the prosthesis implanter 200. The locking mechanism 1 can be accurately moved into the annular groove 102 of the prosthesis 100 through the positioning action of the second sub-sleeve 3214, the positioning action of the second sub-sleeve 3214 can also limit the length of the first sub-sleeve 3213 extending into the connecting hole 101 of the prosthesis 100, a certain space can be reserved in the connecting hole 101 of the prosthesis 100 for the push rod 2 to stretch and retract, the push rod 2 is prevented from propping against the prosthesis 100 to disturb the position of the prosthesis 100 in the process of extending and unlocking the connecting hole 101 of the prosthesis 100, and the probability of the prosthesis 100 deviating from a preset position is reduced.

In one embodiment, the mounting holes are formed in the first sub-sleeve 3213.

In one embodiment, the first and second sub-sleeves 3213, 3214 are welded.

In one embodiment, the first and second sub-sleeves 3213, 3214 are integrally formed.

In an embodiment, the operating device 323 abuts against the first sub-sleeve 3213 along the axial direction of the push rod 2 to limit the operating device 323 from moving away from the limiting portion 3211.

In an embodiment, the push rod 2 abuts against the first sub-sleeve 3213 along the axial direction of the push rod 2 to limit the operating device 323 from moving away from the limiting portion 3211.

In an embodiment, the operating device 323 and the push rod 2 are both abutted with the first sub-sleeve 3213 along the axial direction of the push rod 2 to limit the operating device 323 from moving away from the limiting portion 3211.

In an embodiment, referring to fig. 14 to 16, the first sub-sleeve 3213 is formed with a limiting hole 32131, the limiting hole 32131 is located at one side of the limiting portion 3211 facing the operating device 323 along the axial direction of the push rod 2, the limiting hole 32131 and the limiting portion 3211 are arranged at intervals along the axial direction of the push rod 2, and the operating device 323 is partially located in the limiting hole 32131. In such a structural form, since the limiting hole 32131 is located at one side of the limiting portion 3211 facing the operation device 323 along the axial direction of the push rod 2, the limiting hole 32131 and the limiting portion 3211 are arranged at intervals, the operation device 323 in the limiting hole 32131 is limited by the limiting hole 32131, when the operation device 323 moves to one end of the limiting hole 32131 facing the limiting portion 3211 along the axial direction of the push rod 2 in the process of moving the operation device 323 to the limiting portion 3211, one side of the operation device 323 facing the limiting portion 3211 along the axial direction of the push rod 2 abuts against the first sub-sleeve 3213, and the operation device 323 is arranged at intervals with the limiting portion 3211, so that the distance that the operation device 323 drives the push rod 2 to extend out of the first sub-sleeve 3213 into the connecting hole 101 of the prosthesis 100 is limited, and the distance that the push rod 2 extends out of the first sub-sleeve 3213 into the connecting hole 101 of the prosthesis 100 is excessively long in the process of switching the locking mechanism 1 to the unlocking state is prevented from disturbing the position of the prosthesis 100. The position of the prosthesis 100 is hardly disturbed by the push rod 2, reducing the probability of the prosthesis 100 deviating from the preset position.

In one embodiment, referring to fig. 16, the pin 3232 penetrates the limiting hole 32131.

In an embodiment, referring to fig. 19 and 20, the actuator 3 includes a third sleeve 331, the third sleeve 331 is in threaded connection with the push rod 2, the locking mechanism 1 is disposed at one end of the third sleeve 331, and the third sleeve 331 is used for driving the push rod 2 to reciprocate relative to the third sleeve 331 through a threaded transmission, so that the locking mechanism 1 is switched between a locked state and an unlocked state. In this structure, the third sleeve 331 is screwed to the push rod 2, and the push rod 2 is reciprocally moved with respect to the third sleeve 331 by the screw transmission, so that the state of the lock mechanism 1 provided at one end of the third sleeve 331 is switched. Rotating the third sleeve 331 causes the push rod 2 to protrude from the third sleeve 331 into the lock mechanism 1, and the state of the lock mechanism 1 is switched to the lock state. Reversing the third sleeve 331 retracts the push rod 2 from the locking mechanism 1 into the third sleeve 331, and the state of the locking mechanism 1 is switched to the unlocked state. The third sleeve 331 as the actuator 3 is screwed with the push rod 2, so that the structure of the actuator 3 is simplified, and the manufacturing cost of the actuator 3 is reduced.

In one embodiment, the locking mechanism 1 is connected to the third sleeve 331.

In one embodiment, the locking mechanism 1 is integrally formed with the third sleeve 331.

In one embodiment, the locking mechanism 1 disposed at one end of the third sleeve 331 has elasticity.

In one embodiment, a plurality of locking members 11 are arranged at intervals along the circumferential direction of the push rod 2, and the locking members 11 are connected to the third sleeve 331.

In one embodiment, referring to fig. 19 and 20, the actuator 3 further includes a handle 332 sleeved outside the third sleeve 331.

In one embodiment, referring to fig. 20, an inner thread 3311 is formed at an end of the third sleeve 331 facing away from the locking mechanism 1 in the axial direction of the push rod 2, the push rod 2 is formed with an outer thread 28 connected to the inner thread 3311, and the outer thread 28 is located at an end of the push rod 2 facing away from the locking mechanism 1 in the axial direction of the push rod 2.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The prosthesis implanter is characterized by comprising a locking mechanism, a push rod and an actuator, wherein the locking mechanism is arranged on the actuator, the push rod is movably arranged on the actuator, the actuator is used for driving the push rod to reciprocate so as to enable the locking mechanism to be switched between a locking state and an unlocking state, the radial dimension of the locking mechanism along the push rod in the locking state is a first dimension, the radial dimension of the locking mechanism along the push rod in the unlocking state is a second dimension, and the first dimension is larger than the second dimension;

The actuator is any one of the following actuators:

2. The prosthetic injector of claim 1, wherein the second handle is formed with a pawl, the prosthetic injector further comprising a rack provided to the first handle, the rack being formed with a plurality of ratchet teeth arranged along an extending direction of the rack, the first handle and the second handle being capable of being brought close to each other such that the pawl is caught between adjacent two of the ratchet teeth.

3. The prosthesis injector of claim 2, wherein the rack is rotatably connected to the first handle, the rack being a first center of rotation relative to a center of rotation of the first handle, the prosthesis injector further comprising a resilient mechanism at least partially mounted to the first handle, the resilient mechanism having a rotation stop located at an end of the first center of rotation facing away from the pawl in an extension direction of the rack, the rotation stop being abuttable to the rack to limit disengagement of the ratchet from the pawl, and a toggle device rotatably connected to the second handle for toggling the rack off the pawl.

4. The prosthesis injector of claim 3, wherein the toggle device has a second rotation center with respect to the rotation center of the second handle, the toggle device having a toggle portion located on a side of the second rotation center toward the pawl in an arrangement direction of the pawl and the rotation stop portion, and an operating portion located on a side of the second rotation center away from the pawl in the arrangement direction of the pawl and the rotation stop portion.

5. The prosthesis injector of claim 3, wherein the elastic mechanism comprises a second elastic member and a third elastic member, the second elastic member is mounted on the first handle, the rotation stopping portion is formed on the second elastic member, the third elastic member is mounted on the second handle, the second elastic member is disposed on the third elastic member, and the elastic force of the second elastic member and the elastic force of the third elastic member are used for keeping the first handle and the second handle away from each other.

6. The prosthesis implanter according to any of claims 1-5, wherein an avoidance groove is formed at one end of the second handle facing the push rod, the avoidance groove is in a long strip shape, the extending direction of the avoidance groove is crossed with the axial direction of the push rod, and one end of the push rod facing away from the locking mechanism is penetrated in the avoidance groove to be rotationally connected with the second handle.

7. The prosthesis implanter according to any of claims 1-5, wherein the first handle has two first mounting portions arranged oppositely and a first avoidance region between the two first mounting portions, the two first mounting portions are arranged in a direction intersecting with the axial direction of the push rod in a manner of being opposite to each other, the second handle is arranged in the first avoidance region in a manner of being penetrated through the first avoidance region, the second handle is respectively connected with the two first mounting portions in a manner of being rotated, one end of the push rod, which is away from the locking mechanism, has two second mounting portions arranged oppositely and a second avoidance region between the two second mounting portions, the two second mounting portions are arranged in a direction intersecting with the axial direction of the push rod in a manner of being opposite to each other, and the second handle is arranged in the second avoidance region in a manner of being penetrated through the second avoidance region and is respectively connected with the two second mounting portions in a manner of being rotated.

8. The prosthesis injector of any one of claims 1-5, wherein the pushrod comprises an actuating segment and a driving segment connected at an end of the actuating segment facing away from the locking mechanism, the second handle is rotatably connected with the driving segment, the diameter of the driving segment is larger than that of the actuating segment, the first sleeve has a first accommodating cavity and a second accommodating cavity which are mutually communicated, the second accommodating cavity is positioned at one side of the first accommodating cavity facing away from the locking mechanism, the diameter of the second accommodating cavity is larger than that of the first accommodating cavity, the actuating segment is positioned at least partially in the first accommodating cavity, and the driving segment is positioned in the second accommodating cavity.

9. The prosthesis implantation device of any one of claims 1-5, wherein the first sleeve comprises a main sleeve and an auxiliary sleeve, the locking mechanism is disposed at one end of the main sleeve, the auxiliary sleeve is sleeved at one end of the main sleeve, which is away from the locking mechanism, the first handle and the auxiliary sleeve are integrally formed, and the second handle is arranged through the auxiliary sleeve.

10. The prosthesis injector according to claim 1, wherein a mounting hole is formed in the wall of the second sleeve, the mounting hole is located at one end of the second sleeve, which is away from the operation device, the locking mechanism is movably arranged in the mounting hole, one end of the push rod, which is away from the operation device, is provided with a switching part, the diameter of the switching part gradually increases along the direction of the operation device pointing to the locking mechanism, and the switching part is used for pushing the locking mechanism to move in the mounting hole so as to enable the locking mechanism to switch between the locking state and the unlocking state.

11. The prosthetic injector of claim 10, wherein the pushrod has an end stop at an end of the switching portion facing away from the operating device, the end stop abutting the second sleeve in an axial direction of the pushrod to limit the operating device from being away from the limiting portion when the locking mechanism is in the locked state.

12. The prosthesis injector according to claim 1, 10 or 11, wherein the second sleeve comprises a first sub-sleeve and a second sub-sleeve which are connected with each other, the first sub-sleeve is sleeved on the push rod, the second sub-sleeve is sleeved on the outer side of the first sub-sleeve, the locking mechanism is arranged at one end of the first sub-sleeve, the operating device penetrates through the first sub-sleeve and the second sub-sleeve along the radial direction of the push rod, the limiting part is formed on the first sub-sleeve, the second sub-sleeve is positioned on one side of the locking mechanism facing the operating device along the axial direction of the push rod, and when the locking mechanism is in a locking state, the operating device and/or the push rod is/are in abutting joint with the first sub-sleeve along the axial direction of the push rod so as to limit the operating device to be far away from the limiting part.

13. The prosthetic injector of claim 12, wherein the first sub-sleeve is formed with a spacing bore on a side of the spacing portion facing the operating device in an axial direction of the pushrod, the spacing bore and the spacing portion being spaced apart in the axial direction of the pushrod, the operating device being partially located within the spacing bore.

14. The prosthesis implanter is characterized by comprising a locking mechanism, a push rod and an actuator, wherein the locking mechanism is arranged on the actuator, the push rod is movably arranged on the actuator, the actuator is used for driving the push rod to reciprocate so as to enable the locking mechanism to be switched between a locking state and an unlocking state, the radial dimension of the locking mechanism along the push rod in the locking state is a first dimension, the radial dimension of the locking mechanism along the push rod in the unlocking state is a second dimension, and the first dimension is larger than the second dimension;

15. The prosthetic injector of claim 14, wherein the locking mechanism comprises a plurality of locking elements coupled to the actuator, the plurality of locking elements being spaced apart along a circumference of the pushrod.

16. The prosthetic injector of claim 15, wherein two adjacent locking elements and the actuator enclose a drag reducing region, the drag reducing region being located at an end of the locking elements axially toward the actuator along the pushrod, the drag reducing region having a greater span along the circumferential direction of the pushrod than the span of two adjacent locking elements along the circumferential direction of the pushrod.