CN210811350U - Alignment positioning device for distal end of femoral osteotomy - Google Patents

Abstract

The utility model discloses a thighbone cuts bone distal end and aligns positioner is connected to thighbone excision protection piece through thighbone cuts bone positioning director, including swing platform, swing setting element and locating lever. The swing table is provided with a mounting hole, one end of the positioning rod extends into the mounting hole, the swing positioning piece is fixedly connected with the swing table and can rotate relative to the positioning rod along with the swing table, a through hole extending along the length direction of the positioning rod is formed in the positioning rod, an intramedullary rod penetrates through the through hole and is inserted into a distal femur during an operation, the swing table is further provided with a guide hole, the guide hole extends to the lower surface of the swing table from the upper surface of the swing table, and the guide rod is inserted into the guide hole. The device comes positioner turned angle through swing structure, and the operation is directly perceived, can effectively reduce the maloperation.

Description

Alignment positioning device for distal end of femoral osteotomy

Technical Field

The utility model relates to the field of medical equipment, concretely relates to thighbone cuts bone distal end and aligns positioner.

Background

In the orthopedic diagnosis, many patients need to undergo osteotomy due to injury to the bones of the human body or other pathological deformities of the bones caused by various accidents.

In the case of a knee joint, a prosthetic knee joint is generally installed after a diseased portion is removed by cutting a bone of a patient. Knee replacement osteotomies generally include distal femoral osteotomies, proximal tibial osteotomies, condylar osteotomies, patellar osteotomies, and the like.

Because the shape of the osteotomy and the plant prosthesis need to be positionally matched, accurate positioning of the osteotomy site is required. Traditional thighbone cuts bone positioner operation and wastes time and energy, needs both hands swivel button to guarantee to rotate certain angle, and the fixed of angle also needs meticulous the affirmation simultaneously. Further affecting the operation efficiency and causing misoperation of doctors.

Accordingly, there is a need for a better femoral resection positioning device.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a convenient operation, the accurate distal end alignment positioner in location.

In order to solve the technical problem, the utility model provides a distal alignment positioning device for femoral osteotomy, which is connected to a femoral resection protection block by a femoral positioning guide, the femoral positioning guide is provided with a guide rod, the far-end aligning and positioning device comprises a swinging table, a swinging positioning piece and a positioning rod, the swinging table is provided with a mounting hole, one end of the positioning rod extends into the mounting hole, the swinging positioning piece is fixedly connected with the swinging table and can rotate along with the swinging table relative to the positioning rod, a through hole extending along the length direction of the positioning rod is arranged inside the positioning rod, an intramedullary rod passes through the through hole and is inserted into the distal femur during operation, the swing table is further provided with a guide hole, the guide hole extends from the upper surface of the swing table to the lower surface of the swing table, and the guide rod is inserted into the guide hole. .

In one embodiment, the distal end alignment positioning device further includes a locking member, the locking member is mounted on the positioning rod and provided with a locking portion, the swinging positioning member is provided with a locking portion cooperating with the locking portion, and after the swinging positioning member is rotated to a desired position, the locking portion cooperates with the locking portion to lock the swinging positioning member and the positioning rod to each other.

In one embodiment, the swinging positioning member has a sector-shaped main body, the locking position is a plurality of sawtooth grooves formed in the periphery of the sector-shaped main body, the locking portion is a locking protrusion formed on the locking member, and the locking protrusion is engaged in one of the sawtooth grooves when the locking position is in the locking position.

In one embodiment, a scale is provided on a surface of the fan-shaped body, and the scale corresponds to an angle of rotation of the swing positioning member relative to the positioning rod.

In one embodiment, a locking piece through hole extending along the length direction of the locking piece is formed in the middle of the locking piece, and the locking piece through hole is matched with the outer diameter of the positioning rod to enable the locking piece to be sleeved on the positioning rod.

In one embodiment, the distal end alignment positioning device further includes an elastic member and a fixing member, the elastic member is disposed between the locking member and the fixing member, and the swinging positioning member enters the unlocked position by operating the locking member to press the elastic member and slide the locking member on the positioning rod so that the locking protrusion is disengaged from the serration.

In one embodiment, the lower portion of the locking member is provided with an operating portion by which the locking member is driven to slide on the positioning rod.

In one embodiment, the axis of the guide hole is perpendicular to the axis of the mounting hole.

In one embodiment, the distal alignment positioning device further comprises a locking knob, a side portion of the swing table is provided with a knob hole, and the locking knob is installed in the knob hole and is operated to move by the locking knob.

In one embodiment, the knob hole communicates with the guide hole, and the locking knob is further capable of fixing the guide bar in the guide hole.

The utility model discloses a far-end aligns positioner adopts the periphery to have the fan-shaped swing setting element of rodent recess, through swing structure, ensures turned angle and the definite position of rodent recess, accurately finds needs wobbling point fast, and then saves the operation time. The device simple structure can reduce manufacturing cost, makes things convenient for the doctor to control the apparatus simultaneously, reduces the maloperation. In addition, the device adopts fan-shaped swinging piece for easy operation is directly perceived, reduces the first-hand degree of difficulty, is favorable to extensively using widely.

Drawings

FIG. 1 is a front view of the alignment and positioning device for the distal end of a femoral resection of the present invention;

FIG. 2 is an exploded perspective view of the distal alignment positioning device of FIG. 1;

FIG. 3 is a reference view of the distal alignment positioning device of FIG. 1 in use, positioned to the left third scale;

FIG. 4 is a perspective view of a femoral resection positioning guide; and

FIG. 5 is a perspective view of a femoral resection protection block.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

Certain surgical procedures, such as knee replacement procedures, require bone to be cut off of the distal portion of the femur, and the cut-off shape needs to be matched in position to the prosthesis. In order to implement the operation, a distal femur osteotomy assembly is required, which generally includes a femur resection protection block, a femur resection positioning guide and a distal alignment positioning device, wherein the femur resection protection block is provided with screw holes at different positions, and the screw holes can be accurately positioned while adjusting instruments, so as to ensure stable femur osteotomy amount in the operation. In order to ensure the rotation fit of the vertical line angle, the alignment positioning device of the distal end of the femoral osteotomy is utilized to ensure that the vertical line rod can rotate to a certain position. Meanwhile, the matching characteristic precision is very high, and a stable and accurate connection mode can be achieved each time. In order to ensure quick and convenient connection, a positioning guider is used to ensure accurate connection and high matching precision.

The utility model relates to a distal end alignment positioner among the femoral osteotomy locating component. The distal alignment positioning device is mainly used in cooperation with a femoral osteotomy positioning guide and a femoral resection protection block. Will through thighbone osteotomy location director the utility model discloses a distal end aligns positioner and is connected to thighbone resection protection piece, and passes through the utility model discloses a distal end aligns positioner and fixes a position thighbone resection protection piece.

The distal end aligning andpositioning device 100 according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1-3 illustrate a distal endalignment positioning device 100 in accordance with an embodiment of the present invention. As shown in fig. 1-3, the alignment and positioning device for the distal end of a femoral resection of the present invention is connected to a femoral resection protection block (shown in fig. 5) by a femoral positioning guide (shown in fig. 4), wherein the femoral positioning guide is provided with a guide rod. The utility model discloses a far end alignment positioner is generally including swing platform 1, locatinglever 2 andswing setting element 3, swing platform 1 is equipped with the mounting hole, the one end of locating lever stretches into in the mounting hole, swing setting element and swing platform fixed connection can rotate for the locating lever along with the swing platform, the inside of locating lever is equipped with the through-hole that extends along locating lever length direction, the intramedullary pole passes the through-hole and inserts in the distal end thighbone during the operation, the swing platform still is equipped with the guiding hole, the guiding hole extends to the lower surface of swing platform from the upper surface of swing platform, the guide bar of thighbone positioning director inserts in the guiding hole.

The front end face of the swing table 1 is used for contacting with the most protruding part of the distal end of the femur. The middle part of the lower side of the front end surface of the swing table 1 forms an arc-shaped notch 17, and the arc-shaped notch 17 divides the front end surface of the swing table 1 into two surfaces which are respectively contacted with the left condyle or the right condyle of the femur. It will be appreciated by those skilled in the art that the lower middle portion of the anterior surface of the wobble table 1 can also be formed as an arcuate groove, or other suitably shaped groove, to divide the anterior surface of the wobble table 1 into two surfaces that contact the left or right condyle of the femur, respectively.

With continued reference to fig. 1-3, the swing table 1 is provided with amounting hole 13 penetrating in the front-rear direction, and the front end of thepositioning rod 2 extends into themounting hole 13. In the present embodiment, the portion of thepositioning rod 2, the front end of which is fitted into themounting hole 13, has a rectangular shape, and accordingly, themounting hole 13 is a rectangular hole. However, it will be understood by those skilled in the art that themounting hole 13 and the front end of thepositioning rod 2 may be formed in other shapes such as a trapezoidal table.

In one embodiment, the front end of thepositioning rod 2 is inserted into themounting hole 13 and has a rectangular body and an arc-shaped edge disposed at the front end of the rectangular body. In one embodiment, the body of the portion of the upper end of thepositioning rod 2 fitted into themounting hole 13 is a table body having two parallel planes, i.e., a front plane and a rear plane, and accordingly, two side walls of themounting hole 13 are parallel to each other, and may have a rectangular shape, a trapezoidal table shape, or other suitable shapes.

The oscillating table 1 is also provided with aguide hole 14, and theguide hole 14 extends from the upper surface to the lower surface of the oscillating table 1 to form a through hole. Theguide hole 14 is used to cooperate with theguide rod 21 of the femoralresection positioning guide 200 shown in fig. 4, and in particular, the femoralresection positioning guide 200 is coupled to thedistal alignment fixture 100 by inserting theguide rod 21 of the femoralresection positioning guide 200 into theguide hole 14.

The side of the swing table 1 is further provided with alock knob 10, and the swing table 1 is operated to swing left and right around thepositioning rod 2 by holding thelock knob 10 by hand. Specifically, the side portion of the swing table 1 is provided with aknob hole 15, theknob hole 15 communicates with theguide hole 14 on one side, and the front end of the lockingknob 10 extends into the swing table 1 from theknob hole 15 and abuts against theguide hole 14. After the twoguide rods 21 of the femoralresection positioning guide 200 are respectively snapped into the guide holes 14, the lockingknob 10 is tightened so that the front end of the lockingknob 10 abuts against theguide rods 21 from the side, thereby locking the femoral resection positioning guide to the swing table 1. The lockingknob 15 may be provided at the left and/or right portion of the swing table 1. The end of the lockingknob 15 can be provided with a handle part, and the swing table 1 can be operated to swing left and right around thepositioning rod 2 by holding the handle part by hand.

With continued reference to fig. 1-3, the lockingknob 10 may include a connectingportion 101 and a hand-heldportion 102, the connectingportion 101 being provided with spaced apart threads, i.e., threads at the front and rear of the connectingportion 101 and no threads at the center, the center of the non-threaded portion being engaged by thepin 11, and the lockingknob 10 being secured to the swing table 1 by inserting thepin 11 into the center of the connectingportion 101 after the lockingknob 10 is installed in place in theknob hole 15.

A throughhole 16 extending along the length direction of the positioning rod is formed in thepositioning rod 2, an intramedullary rod (not shown) passes through the throughhole 16 and is inserted into the medullary cavity during operation, wherein the intramedullary rod is also called a vertical rod and is in a long rod shape and is used for being inserted into the medullary cavity, usually a femoral medullary cavity of a knee joint, and the inserted position of the intramedullary rod determines the rotation axis of the femur. The intramedullary rod is provided with a pointed end at the front end, so that the intramedullary rod can be conveniently inserted into the throughhole 16 of thepositioning rod 2, and the intramedullary rod can be provided with a thread matched with the throughhole 16 of thepositioning rod 2.

The swing table 1 further has a swingtable pin hole 71 in the middle of the upper surface thereof, the swingtable pin hole 71 is provided between the twoguide holes 14, and extends from the upper surface of the swing table 1 through the mountinghole 13 to the lower surface of the swing table 1, and accordingly, a positioningrod pin hole 72 is provided in a portion of thepositioning rod 2 extending into the mountinghole 13, and after thepositioning rod 2 is inserted into the mountinghole 13, the swing table 1 and thepositioning rod 2 are pivotally connected by inserting twopins 7 into the positioningrod pin hole 72 and the swingtable pin hole 71 from the upper and lower surfaces of the swing table 1, so that the swing table 1 can swing with respect to thepositioning rod 2 about thepins 7.

The swingingpositioning member 3 is fixedly connected with the swinging table 1 and can be designed into a pendulum bob, a pendulum pin or other suitable irregular shapes. When the swing table 1 swings, the swing angle of the swing table 1 can be measured by theswing positioning member 3. Specifically, theswing spacer 3 has a fan-shapedbody 31, a connectingportion 32 is provided at a front end of the fan-shapedbody 31, a lower surface of the connectingportion 32 protrudes downward to form aprotrusion 33, and a swingspacer pin hole 121 is further provided in the connectingportion 33.

Accordingly, thepositioning rod 2 is provided with a connectingportion accommodating hole 122, and the swing table 1 is provided with a second swingtable pin hole 124. Theprotrusion 33 of theswing spacer 3 is fitted into the couplingportion accommodating hole 122, so that theswing spacer 3 is rotatably coupled to thepositioning rod 2. Then, the front end of thepositioning rod 2 and the connectingportion 32 of theswing positioning element 3 are inserted into the mountinghole 13, and then thepin 13 is inserted into the second swingtable pin hole 124 and the swing positioningelement pin hole 121 in sequence, so that theswing positioning element 3 is fixedly connected with the swing table 1. It will be understood by those skilled in the art that theswing positioning element 3 can also be fixed to the swing table 1 by other means, such as welding, screwing, snapping, etc.

It will be understood by those skilled in the art that the sector-shaped body of theswing spacer 3 may be a plate-shaped sector formed by a single panel, or a sector of another shape. For example, the fan-shaped body is composed of swing rods and a fan ring fixed below the swing rods, and the number of the swing rods can be set to be one or more. Further, the fan-shaped body can be limited to be a circular body, a circular ring body or other suitable variants, and should be understood to be within the scope of the present invention.

When the swing table 1 is at the preset position, the connecting line of thepin 12 and thepin 7 is parallel to thepositioning rod 2, thepin 12 can be located below or above thepin 7, and the fan-shaped symmetry axis passes through thepin 12 and is parallel to thepositioning rod 2, so that the swing position of theswing positioning member 3 is limited to swing left and right relative to thepositioning rod 2.

The angular range of the swingingpositioning member 3 may be set to-9 deg. to the central axis. Where a "negative" angle represents a left swing and a "positive" angle represents a right swing. Theswing positioning piece 3 is provided with scale marks corresponding to the swing angle. And each time the swingingpositioning piece 3 swings for 1 degree, a scale mark is arranged, and 19 scale marks including 0, L (left) 1-9 and R (right) 1-9 are arranged. As shown in fig. 3, a schematic position diagram of the swingingpositioning member 3 swinging to the left (L)3 scale is shown, that is, the swinging table 1 is shown swinging to the left (L)3 ° position at this time.

The distalalignment positioning device 100 also includes alocking element 4. The bottom of theswing positioning member 3 is provided with a locking structure (not shown) for interlocking with the lockingmember 4. When the swing table is located at the unlocking position, theswing positioning piece 3 can swing left and right along with the swing table 1, when the swing table is located at the locking position, theswing positioning piece 3 and thelocking piece 4 are locked with each other, theswing positioning piece 3 is locked at the current swinging position, and therefore the swing table 1 is also locked at the current swinging position.

In the embodiment shown in fig. 1-3, the outer periphery of the sector-shaped body of theswing positioning member 3 is provided with a plurality of tooth-like recesses 31, and the lockingmember 4 is provided with a lockingprojection 41. When the lockingprotrusion 41 is not engaged in thegroove 31, theswing positioning member 3 and the lockingmember 4 are in an unlocked state, and at this time, theswing positioning member 3 can swing left and right along with the swing table 1. When the lockingprojection 41 is snapped into therecess 31, theswing positioning element 3 is locked in the currently swung position, so that the swing table 1 is also locked in the currently swung position. It will be appreciated by those skilled in the art that the recesses of the outer periphery of the sector-shaped body of theswing positioning member 3 may be provided with a triangular shape or other suitable shape, and correspondingly the lockingmember 4 is provided with locking protrusions shaped to match the shape of the recesses of theswing positioning member 3.

The position of eachgroove 31 is matched to the angle of oscillation of theoscillating positioning member 3. Preferably, corresponding grooves are arranged at the positions where the swingingpositioning piece 3 and the swinging table 1 swing to integer reading. For example, the pivotingspacer 3 can pivot by-9 ° to 9 ° relative to the center axis. Where a "negative" angle represents a left swing and a "positive" angle represents a right swing. A groove is arranged at each position of swinging 1 degree, so that the swinging table 1 can accurately swing to the positions of integral degrees of-9 degrees, -8 degrees, -7 degrees … … 0 degrees, 1 degree, 2 degrees … … degrees, 8 degrees, 9 degrees and the like. Preferably, each groove is correspondingly provided with a scale mark, and 19 scale marks including 0, L (left) 1-9 and R (right) 1-9 are arranged. A series of femoral prostheses are typically designed at integer readings of the wobble, each reading corresponding to one model of femoral prosthesis. The orthopedic positioning device in the prior art is not provided with a groove, and a doctor can directly read the position to determine whether the swing table 1 swings to the position of integral reading, so that human errors are easily introduced, and the swing position of the swing table 1 is difficult to accurately position. Compared with the prior art, the utility model discloses a setting of recess, swing platform 1 swings by a recess to next recess at every turn, has avoided prior art because the inaccurate positioning deviation who causes of doctor's reading swing platform 1.

In this embodiment, the lockingmember 4 includes a hollowcylindrical body 42 sleeved on thepositioning rod 2, anelastic member 43 and a fixingmember 44, and thecylindrical body 42 is slidably sleeved on thepositioning rod 2. Specifically, the inside of the cylindricalmain body 42 is provided with a positioningrod mounting hole 45 that extends in the length direction of thepositioning rod 2 in cooperation with the outer periphery of thepositioning rod 2, and thepositioning rod 2 penetrates into the positioningrod mounting hole 45. Anoperating part 421 protruding downwards is further arranged at the front end of the cylindricalmain body 42, anotch 422 matched with the fan-shaped main body of theswing positioning piece 3 is further arranged above the operatingpart 421, a lockingprotrusion 41 protruding forwards is arranged in thenotch 422, and the lockingprotrusion 41 and the cylindrical main body can be integrally designed or fixed on the cylindrical main body in a welding mode, a screw connection mode, a clamping mode and the like.

With continued reference to fig. 2, a portion of the upper side of thepositioning rod 2 corresponding to the cylindrical body of the lockingmember 4 is provided with alimit groove 99 extending in the length direction of thepositioning rod 2, thecylindrical body 42 of the lockingmember 4 is provided with a slide shaft (not shown), and thecylindrical body 42 slides along thepositioning rod 2 by sliding the slide shaft thereof along thelimit groove 99, thereby achieving locking or unlocking with theswing positioning member 2.

Anelastic member 43 such as a spring is mounted on therear end 423 of the securinglever 2 and abuts against a step (not shown) inside the lockingmember 4, and a securingmember 44 is secured to therear end 423 of the securinglever 2 by means of, for example, a pin, so that thecylindrical body 42 can reciprocate within a stroke limited by the limit groove by the elastic force of theelastic member 43.

When the cylindrical body is pressed backward against the elastic force of theelastic member 43, the lockingprojection 41 at the upper end of thecylindrical body 42 is disengaged from therodent groove 31 at the outer periphery of the sector-shaped body of theswing positioning member 3, and the locking is released. When thecylindrical body 42 is released, the locking projection at the upper end of thecylindrical body 42 projects into therodent groove 31 in the outer periphery of the sector-shaped body of theswing positioning member 3, completing the locking.

In one embodiment, thecylindrical body 42 is made slidable along the retaining groove by passing thepin 8 through the upper side of thecylindrical body 42 and into the retaininggroove 99, and the fixingmember 44 is fixed to therear end 423 of thepositioning rod 2 by, for example, thepin 9.

Figures 4 and 5 show perspective views of a femoralresection positioning guide 200 and a femoralresection protection block 300, respectively, that can be used in connection with the present invention. Wherein thedistal alignment fixture 100 can be used with the femoralresection positioning guide 200 and the femoralresection protection block 300.

The femoralresection positioning guide 200 is provided with aguide rod 21 and anattachment post 22. The distalalignment positioning device 100 is provided with aguide hole 14. The femoralresection protection block 300 is provided with acoupling hole 301, and the distalalignment positioning device 100 and the femoralresection positioning guide 200 are coupled to each other by inserting theguide rod 21 into theguide hole 14. Thefemoral positioning guide 200 and the femoralresection protection block 300 are interconnected by theconnection post 22 inserted into theconnection hole 14. Thefemoral positioning guide 200 is also provided with a locking member 23. The femoralresection protection block 300 is provided with alocking slot 302. The retaining member 23 cooperates with the retainingslot 302 to retain the femoralresection positioning guide 200 to thefemoral resection block 300.

During operation, after an intramedullary rod (also called a vertical line rod) is inserted into the throughhole 16 of thepositioning rod 2 of the distalalignment positioning device 100, the assembled intramedullary rod is inserted into a medullary cavity, and the swinging position of the operation swinging table 1 is adjusted, so that thedistal osteotomy aligner 100 is contacted with the most protruding part of the distal femur, and the eversion angle is confirmed to be the correct angle, thereby ensuring accurate osteotomy.

The assembled femoralresection protection block 300 and the femoralresection positioning guide 200 are inserted into the two guide holes 14 on the distalalignment positioning device 100, the femoralresection protection block 300 is ensured to be well contacted with the cortex of the distal front edge of the femur, and the lockingknob 10 on the distalalignment positioning device 100 is screwed to fix the femoralresection positioning guide 200.

After the valgus angle is adjusted, the femurresection protection block 300 is fixed on the femur, and then the distalalignment positioning device 100 and thepositioning guide 200 are removed for the subsequent operation related to the distal femur osteotomy.

According to the above, the utility model discloses a far end aligns positioner adopts the periphery to have the fan-shaped swing setting element of rodent recess, through swing structure, ensures turned angle and the definite position of rodent recess, accurately finds needs wobbling point fast, and then saves the operation time. The device simple structure can reduce manufacturing cost, makes things convenient for the doctor to control the apparatus simultaneously, reduces the maloperation. In addition, the device adopts fan-shaped swinging piece for easy operation is directly perceived, reduces the first-hand degree of difficulty, is favorable to extensively using widely.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments. These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims (10)

1. The utility model provides a thighbone cuts bone distal end and aligns positioner, its is connected to thighbone resection protection piece through thighbone positioning guide, thighbone positioning guide is provided with the guide bar, a serial communication port, distal end alignment positioner is including swing platform, swing setting element and locating lever, the swing platform is equipped with the mounting hole, the one end of locating lever stretches into in the mounting hole, the swing setting element with swing platform fixed connection can follow the swing platform for the locating lever rotates, the inside of locating lever is equipped with the edge the through-hole that locating bar length direction extends, and the intramedullary pole passes during the operation the through-hole inserts in the distal end thighbone, the swing platform still is equipped with the guiding hole, the guiding hole is followed the upper surface of swing platform extends to the lower surface of swing platform, the guide bar inserts in the guiding hole.

2. The distal alignment positioning device of claim 1, further comprising a locking member mounted on the positioning rod and having a locking portion, wherein the swinging positioning member has a locking portion engaged with the locking portion, and wherein the locking portion engages with the locking portion to lock the swinging positioning member and the positioning rod to each other when the swinging positioning member is rotated to a desired position.

3. The distal alignment locator of claim 2 wherein the wobble retainer has a sector shaped body, the locking position is a plurality of serrated recesses provided on a periphery of the sector shaped body, and the locking portion is a locking protrusion provided on the locking member, the locking protrusion snapping into one of the serrated recesses when in the locking position.

4. The distal alignment fixture of claim 3 wherein the fan-shaped body has a scale on a surface thereof, the scale corresponding to an angle of rotation of the wobble fixture relative to the positioning rod.

5. The distal alignment positioning device of claim 3, wherein the locking member has a locking member through hole extending along the length of the locking member at a middle portion thereof, and the locking member through hole is engaged with the outer diameter of the positioning rod to fit the locking member over the positioning rod.

6. The distal end alignment positioning device according to claim 5, further comprising an elastic member and a fixing member, wherein the elastic member is disposed between the locking member and the fixing member, and the swinging positioning member enters an unlocked position by operating the locking member to press the elastic member and causing the locking member to slide on the positioning rod so that the locking protrusion is disengaged from the serration.

7. The distal end alignment positioning device of claim 6, wherein the locking element is provided at a lower portion thereof with an operating portion by which the locking element is driven to slide on the positioning rod.

8. The distal end alignment positioning device of claim 1 wherein the axis of the guide hole is perpendicular to the axis of the mounting hole.

9. The distal alignment positioning device of claim 8 further comprising a locking knob, wherein the side of the swing table is provided with a knob hole, the locking knob is mounted in the knob hole, and the swing table is operated to move by the locking knob.

10. The distal alignment positioning device of claim 9 wherein the knob hole communicates with the guide hole and the locking knob is further capable of securing a guide rod within the guide hole.

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