CN212037714U

CN212037714U - Medullary core supporter and pushing device thereof

Info

Publication number: CN212037714U
Application number: CN201721861140.3U
Authority: CN
Inventors: 李锋; 岳彦芳; 赵文清
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2020-12-01
Anticipated expiration: 2027-12-27

Abstract

The utility model discloses a medulla core eyelidretractor and pusher thereof belongs to the medical instrument field for treatment femoral head necrosis or other bone injuries, medulla core eyelidretractor include that the surface is the support head of spherical crown type and is located the support piece that can pop out of support head both sides, pusher includes the push rod, is located the card on push rod top and holds the joint and stretch out the back and be located the top of card and hold the screw rod that changes that connects one side. The supporter is connected to the pushing device in a compressed state, the supporter is pushed into the medullary cavity through the pushing device, the medullary core supporter is rotated by a certain angle and then bounced off by utilizing the jacking screw rod, and the medullary core supporter is supported inside the femoral head to prevent the femoral head from collapsing. The utility model discloses carry out the operation back in the femoral head necrosis early stage, prevent further the subside of femoral head, shortened the patient time of being in bed of lying on illness, easy operation, convenience when the operation moreover, it is firm reliable after putting into.

Description

Medullary core supporter and pushing device thereof

Technical Field

The utility model belongs to the technical field of medical instrument, specifically indicate a install in the marrow core be used for supporting the eyelidretractor of skeleton and pusher thereof.

Background

The bone is difficult to restore to the original shape after being fractured, and the bone can not bear the strength for a long time after the operation. Femoral head necrosis is a common disease in orthopedics, and the main reason of the femoral head necrosis is femoral head bone ischemia caused by the fact that the blood circulation of femoral heads is blocked and damaged, so that bone cells, bone marrow stromal cells and fat cells are necrotic. Progression of femoral head necrosis often results in collapse of the subchondral bone of the femoral head and the articular surface cartilage.

The early treatment method of femoral head necrosis generally adopts surgical methods such as core decompression and bone grafting, vascular implantation, osteotomy and the like, which hope to reconstruct the blood circulation of the femoral head to achieve the purpose of treatment, but after the treatment methods are implemented, the femoral head lacks strong support, and cannot prevent the further collapse of the femoral head. At present, in the process of treating femoral head necrosis in countries such as the United states and the like, a metal tantalum rod is used as a support inside a femoral head, the shape of the metal tantalum support rod is cylindrical and is similar to a screw rod, the outer end of the support rod is provided with threads, and the head of the inner end of the support rod is in a semi-spherical shape. When in use, an operation hole is drilled on the side surface of the femoral head towards the inside of the bone marrow and the direction of the femoral head, then the round head end of the support rod is inserted into the hole inwards, the outer end thread of the support rod is connected with the bone layer, and the round head of the support rod is propped against the upper part of the femoral head and the position which is possibly collapsed. The contact area of the support rod with the inner surface of the femoral head after the support rod is implanted is small, even the round head of the support rod is only in point contact with the inner surface of the femoral head, the support effect is poor, the femoral head is possibly abraded and even worn through to form new damage, finally the necrotic femoral head has to be cut off, hip joint replacement has to be carried out after a long time, and the pain and the economic burden of a patient are increased.

Chinese patent document (application No. 9725056.2.4) also discloses a utility model named femoral head memory metal support, which adopts metal wires to be alternately woven into a ring with a spherical surface, when in use, holes are formed on the femoral head and neck, then the support is put into the marrow cavity through the holes by compressing the ring of the support, and then the support is opened by the elasticity of the support metal wires to try to play the role of supporting the collapsed bone surface. However, the support cannot be fixed in bone marrow, can be wandering, can not support the part needing to be supported, has weak supporting force and poor stability, and is difficult to meet the requirement of treating early femoral head necrosis at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a medulla core eyelidretractor and pusher thereof is provided for the treatment femoral head necrosis, medulla core eyelidretractor implants can provide effective support for the position that sinks after the human body, prevents that the femoral head from further sinking, and it is firm reliable after putting into, their convenient to use, easy operation.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a medullary core supporter comprises a supporting head with a spherical crown-shaped outer surface and supporting pieces which are positioned at two sides of the supporting head and can be bounced.

The utility model discloses a further improvement lies in: the supporting piece is hinged at the bottom of the supporting head in a bilateral symmetry mode through the connecting rotating shaft, and the supporting piece is opened through the spring.

The utility model discloses above-mentioned technical scheme's further improvement lies in: the support piece is hinged with the support head through a connecting rotating shaft and rotating shaft seats respectively arranged on the support piece and the support head, and the connecting rotating shaft is inserted in shaft holes of the rotating shaft seats of the support piece and the support head.

The utility model discloses above-mentioned technical scheme's further improvement lies in: the spring is a torsion spring, an elastic sheet or an elastic wire; the spring is supported between the two supporting pieces when the spring is an elastic sheet or an elastic wire.

The utility model discloses a further improvement lies in: the bottom end of the supporting piece is provided with a hanging hole which can enable the supporting piece to be hooked.

The utility model discloses above-mentioned technical scheme's further improvement lies in: the hanging hole is a circular hole and a hook boss is arranged at the inner end of the circular hole.

The utility model discloses above-mentioned technical scheme's further improvement lies in: the inner end of the hanging hole is a long hole or an elliptical hole.

The utility model discloses a further improvement lies in: the two sides of the bottom end of the supporting piece are respectively provided with a pushing and rotating lug boss which corresponds to each other.

The utility model discloses a further improvement lies in: the surfaces of the supporting head and the supporting piece are respectively provided with through holes for placing active broken bones; the surfaces of the supporting head and the supporting piece are provided with micropores for the growth and fusion of bone marrow.

The utility model discloses above-mentioned technical scheme's further improvement lies in: the size of the micropores is 90-300 mu m.

The utility model discloses a further improvement lies in: the bottom of the support member is provided with a row of outward barbs.

The utility model discloses a further improvement lies in: the outer surfaces of the supporting head and the supporting piece are both spherical crown shapes, and when the supporting piece is opened, the outer surface of the supporting piece is contacted with the outer surface of the supporting head to form a smooth and gentle transitional spherical crown surface; when the supporting part is expanded, the bottom end of the supporting part is positioned at the position, which is smaller than the diameter of the medullary cavity, at the lower part of the medullary cavity; the peripheral size of the two supporting pieces is not larger than the external circle size of the supporting head when the supporting pieces are compressed and folded.

A propelling device of a medullary core supporter comprises a propelling rod, a clamping joint for clamping the medullary core supporter is arranged at the top end of the propelling rod, and a jacking and rotating screw rod which corresponds to the clamping joint and extends out to be positioned on the side face of the clamping joint is arranged along the length direction of the propelling rod.

The utility model discloses a medullary core eyelidretractor pusher's further improvement lies in: the clamping joint comprises a vertical rod fixedly connected to the top end of the pushing rod, a clamping connecting rod transversely arranged relative to the vertical rod is fixedly connected to the upper portion of the vertical rod, and clamping cross beams used for hooking the medullary core support are arranged at two ends of the clamping connecting rod; the length direction of the clamping cross beam and the vertical rod of the clamping joint form a certain angle; the jacking and rotating screw rod is positioned on the radial side surface of the clamping and holding connecting rod.

The utility model discloses a medullary core eyelidretractor pusher's further improvement lies in: the side surface of the clamping beam is in a strip shape or an oval shape corresponding to the hanging hole on the support of the medullary core support.

The utility model discloses a medullary core eyelidretractor pusher's further improvement lies in: the two jacking and rotating screws are symmetrically arranged by taking the clamping joints as centers.

The utility model discloses a medullary core eyelidretractor pusher's further improvement lies in: the jacking and rotating screw rod is arranged in a circular long hole which is positioned in the pushing rod and is opposite to the pushing rod in the radial direction.

The utility model discloses a medullary core eyelidretractor pusher's further improvement lies in: the outer end of the pushing rod is fixedly connected with a limiting handle, and the jacking screw rod is connected with the limiting handle through threads; the tail end of the jacking and rotating rod is provided with a knurled handle.

The utility model discloses a medullary core eyelidretractor pusher's further improvement lies in: the pusher rod has a diameter no greater than the outer dimension of the core support.

Due to the adoption of the technical scheme, the utility model discloses the technological progress who gains is:

the utility model discloses a medullary core eyelidretractor places in the inside or other marrow cavities that need support of femoral head for the treatment femoral head necrosis or other bone breakage can provide effective support for collapsing or broken position, prevents that the femoral head from further collapsing, and it is firm reliable after putting into. The push device of the utility model can accurately send the medullary core supporter into the medullary cavity inside the femoral head or other parts, and the medullary core supporter is separated from the push device after rotating for a certain time, and the medullary core supporter is flicked and supported in the medullary cavity; the pushing device is matched with the medullary core supporter for use, the operation is simple and convenient, and the position and the angle of the medullary core supporter can be accurately supported to the collapsed position. The support is connected to the pushing device in a compression state, the support is pushed into a ball hole drilled in advance through the pushing device, the support is rotated by a certain angle through the jacking and rotating screw rod to enable the support to be bounced off, and the support is supported inside the femoral head to prevent the femoral head from collapsing. The utility model discloses carry out the operation back in the femoral head necrosis early stage, played the supporting role of power, prevented further subside of femoral head, shortened the patient time of being in bed of illness, easy operation, convenience when the operation moreover, it is firm reliable after putting into.

The utility model discloses a medulla core eyelidretractor is including being located the middle support head and being located two support piece that support the head both sides, promotes the medulla core eyelidretractor back that targets in place at the pusher of medulla core eyelidretractor, can make two support piece bullet open, supports in the intramedullary of femoral head, two support piece can be firm play supporting role, make support the head and aim at the bone position that takes place pathological change or have collapsed, prevent that the bone from collapsing.

The utility model discloses a support the surface of head and be the spherical crown type, be close with the shape of femoral head pulp cavity, the adaptation uses in the pulp cavity, can play fine laminating supporting role, can provide effective support for the position that sinks to form great area contact with the femoral head inner chamber, thereby avoid wearing and tearing the risk of wearing and tearing even with the femoral head. The utility model discloses a support piece's surface also can make and support the first same shape, and the spherical cap type is all made to the surface, and support piece's surface forms great spherical cap face with the outer surface contact who supports the head when support piece opens to three spherical cap face can slick and sly smooth transition, has increased the holding area to the bone.

The utility model discloses a support piece of medulla core eyelidretractor with support the head through connecting pivot and pivot seat articulated together, form hinge formula connection structure to make support piece prop open in supporting first both sides through the spring, this kind of sound construction is reliable, and the action is accurate. The hinged position of the connecting rotating shaft and the rotating shaft seat is arranged at the bottom of the supporting head, the connecting rotating shaft and the rotating shaft seat are hidden under the supporting head and the supporting piece, the shape of the supporting surface at the upper part is not influenced, and the spherical crown surface of the supporting piece and the spherical crown surface of the supporting head can be in close contact and smooth transition when the supporting piece is opened, so that no gap or distance exists between the two.

The device for the medullary core support to spring the support member can be a spring, and the spring is preferably a torsion spring, an elastic sheet or an elastic wire. When the spring is the elastic sheet or the elastic wire, the elastic sheet or the elastic wire can be supported between the two supporting pieces, and the torsion spring can be arranged on the connecting rotating shaft, so that the supporting pieces can be guaranteed to be bounced open and stably supported, and the compression of the two supporting pieces can be facilitated.

The utility model discloses an one row of outside barb that support piece's of medullary core eyelidretractor's bottom set up, when support piece bounced open, the barb can pierce the femoral head inner wall, can reach stable stay.

The utility model discloses a micropore that support head and support piece's of medulla core eyelidretractor surface were established can supply the bone marrow of growth slowly to grow into the micropore, fuses with the medulla core eyelidretractor and forms a whole. The through holes arranged on the surface of the supporting head and the surface of the supporting piece can be used for new bone marrow to grow into the supporting device, and the active broken bone placed in the medullary core supporting device can be integrated with the bone marrow on the inner wall of the femoral head through the through holes in a fusion growth manner; along with the growth of the bone marrow, the new bone marrow can wrap the medullary core supporter and be fused into a whole; thereby achieving good treatment purpose. The size (depth or diameter) of the micropores is generally 90-300 mu m, and the micropores can be different in size, so that when newly grown bone marrow enters the micropores, the bone marrow can be firmly planted in the micropores, the implanted fresh active bone can grow into the support as soon as possible and is firmly combined with the medullary core support, and the support and the femoral head grow into a whole.

The push device of the medullary core support of the utility model is provided with a clamping joint at the top end of a push rod, and the clamping joint can clamp and hang the compressed medullary core support to ensure that the medullary core support is in a contraction state; the top rotating screw rod is positioned at one side of the clamping joint and can push the medullary core supporter to rotate around the clamping joint when extending out, so that the spherical crown surface of the medullary core supporter is aligned to the part needing to be supported.

The utility model discloses a pusher's card is held the card that connects and is held the connecting rod and transversely install on the montant that the card was held the joint, and the card is held the crossbeam and is then fixed at the both ends of holding the connecting rod to hold the connecting rod and transversely set up for the card, the utility model discloses a hanging hole that two support piece's of medulla core eyelidretractor bottom set up is held the crossbeam with the card and is corresponded, and it can stretch into support piece's hanging hole to make the card hold the crossbeam, and the crossbeam can hang support piece hook through rotatory messenger's card, makes two support piece of medulla core eyelidr. The inner end of the hanging hole of the medullary core supporter is provided with a hook boss, the inner end of the hanging hole is a long hole or an elliptical hole, the side surface of the clamping beam is in a shape corresponding to the hole shape of the hanging hole, the clamping beam can extend into the hanging hole from the inner side of the medullary core supporter, and after the medullary core supporter rotates for a certain angle, the clamping beam is lapped on the hook boss of the hanging hole, so that the supporting piece of the medullary core supporter is hooked by the clamping beam of the clamping joint, and the medullary core supporter is kept in a reduced state, so that the medullary core supporter can be sent into a medullary cavity of a femoral head through an operation hole. The side shapes of the hanging hole and the clamping beam are arranged into long strip shapes or oval shapes, so that the hanging and unhooking operations are facilitated.

The length direction of the clamping beam of the pushing device of the utility model forms a certain angle with the vertical rod of the clamping joint, the angle can be determined according to the position and the angle of punching the medullary cavity of the femoral head in the operation process, and the angle is generally set to be 45 degrees; after the medullary core supporter is compressed, hooked and rotated for 45 degrees, the medullary core supporter keeps a linear state with the pushing rod, and after the medullary core supporter is sent into a medullary cavity, the medullary core supporter rotates for 45 degrees in the reverse direction, and the two supporting pieces of the medullary core supporter lose the hooking constraint of the pushing device clamping the cross beam and naturally spring open.

The utility model discloses a pusher's top is changeed the screw and is located the radial side that the card held the connecting rod, under the general condition, top is changeed the screw and can be set up two symmetrically, the support piece's of medulla ossium eyelidretractor bottom also sets up the boss that changes that pushes away who changes the screw and correspond, two top in the medullary cavity is changeed the screw and is pushing away the boss that changes simultaneously, and it is rotatory to advance and put messenger medullary nucleus eyelidretractor loosely through the top, the rotation angle that can make the medullary nucleus eyelidretractor like this is accurate, make the medullary nucleus eyelidretractor hemisphere face laminate with the inside upper surface accuracy of femoral head, and easy operation is. The jacking screws are symmetrically arranged by taking the clamping joints as centers, so that the two jacking screws can jack and position the medullary core supporter tightly in the process of sending the medullary core supporter into the medullary cavity, and the medullary core supporter cannot rotate.

The top is changeed the screw setting inside the push rod, firstly can reduce pusher's volume, and when the operation, can make the hole of boring on the bone littleer, secondly can play the guide orientation effect to the top screw rod of changeing, makes to promote more accurately. The limiting handle at the outer end of the push rod is convenient to operate, a longer threaded connection channel is also provided for the top rotating rod, and the position is more accurate when the top rotating rod rotates. The knurling handle at the tail end of the jacking and rotating screw rod can conveniently rotate the jacking and rotating screw rod, so that the jacking and rotating screw rod can move forward or move backward more accurately.

The utility model discloses a diameter of the push rod of medulla ossium eyelidretractor pusher is not more than the outside dimension that medulla ossium eyelidretractor supported the head, the peripheral dimension of two support pieces is not greater than the excircle dimension that supports the head when the support piece compression of medulla ossium eyelidretractor folds simultaneously, when the outer circle dimension that the medulla ossium eyelidretractor compressed and hitched hold the connector at pusher like this, the excircle of the spherical crown cross-section of the support head of medullaossium eyelidretractor is maximum dimension, the size of the operation hole of beating out on the thighbone in the operation can refer to the excircle diameter that supports the head of medullaossium eyelidretractor can, can reduce the size in operation hole as far as possible.

The length of the supporting part of the medullary core supporter can be slightly longer, so that when the supporting part is expanded, the bottom end of the supporting part can be supported at the lower part of the medullary cavity, namely, the position below the diameter of the medullary cavity, thereby strengthening the supporting of the supporting part on the whole medullary core supporter and increasing the supporting force.

The utility model discloses a medullary core eyelidretractor can provide effective support for the position that sinks after implanting the human body to form great area contact with the femoral head, thereby avoid current implantation device to wear the risk of wearing and tearing the femoral head even in the treatment use, improved the success rate of performing the operation, promoted the operation effect, reduced patient's pain, have wide clinical application prospect.

Drawings

FIG. 1 is a schematic view of a core supporter and a pushing device thereof after being connected;

FIG. 2 is a schematic diagram of a freely-expanded state of the core support;

FIG. 3 is a side view of the core support;

FIG. 4 is a schematic view of a core support in a compressed state;

FIG. 5 is a schematic view of the configuration of the core holder pusher device;

FIG. 6 is a schematic view of a portion of a core support pusher device;

FIG. 7 is a schematic view of the rotation of the core support under the push of the pusher;

in the figure, 1, a support head; 2. a support member; 4. connecting the rotating shaft; 5. a limiting handle; 6. the clamping connector is 6.1, the connecting rod is clamped 6.2, and the beam is clamped; 7. a push rod; 8. jacking and rotating the screw; 9. a pin; 10. locking the nut; 11. a knurled handle; 12. a spring; 13. a rotating shaft seat; 14. hanging holes; 15. Pushing and rotating the boss; 16. hooking the lug bosses; 18. a through hole; 19. and barbs.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments and accompanying drawings:

the utility model discloses a pusher two parts of medullary core eyelidretractor and medullary core eyelidretractor, pusher are used for putting into the medullary cavity of medullary core eyelidretractor especially femoral head to support broken or necrotic skeleton, especially have very big help to treatment femoral head necrosis or comminuted bone injury. Fig. 1 to 7 show the specific structure, free state, and operation state of the present invention.

The utility model discloses a medullary core eyelidretractor is including supporting head 1 and two support piece 2, two support piece are located the both sides of supporting head 1, support piece 2 can fold or open for supporting head 1, the surface of supporting head 1 is the spherical crown type, support piece also can be the spherical crown type, the surface of supporting head 1 and support piece 2 promptly is the spherical crown type, and two support piece 2 open the back and support head 1 and can form great spherical crown face, support piece 2's surface and the surface of supporting head 1 can be inseparable contact when opening, the great spherical crown face of constitution can slick and sly smooth transition.

The surfaces of the supporting head 1 and the supporting piece 2 are respectively provided with a through hole 18 for placing fresh broken bones, the through hole is generally arranged at the center of the spherical surface of the supporting head or the supporting piece, fresh active broken bones can be placed in the through hole, and the active broken bones can be connected with bones outside the medullary core supporter into a whole through the through holes along with the growth of bone marrow.

Support the interior external surface of head 1 and support piece 2 and all be equipped with micropore or pit, micropore size design generally is 90 mu m ~ 300 mu m, can vary in size. When growing, the active broken bone placed in the spherical surface of the medullary core supporter contacts and fills the micropores on the inner surfaces of the supporting head 1 and the supporting piece 2, when growing, the bone marrow outside the spherical surface of the medullary core supporter contacts and fills the micropores on the outer surfaces of the supporting head 1 and the supporting piece 2, when newly growing bone marrow enters the micropores, the bone marrow can be firmly planted in the micropores and firmly combined with the medullary core supporter, so that the supporter and the bone marrow grow and are fused into a whole.

Two supporting pieces 2 of the medulla core supporting device are symmetrically hinged at two sides of a supporting head 1, and the supporting pieces 2 are connected with the supporting head 1 through a connecting rotating shaft 4. The upper part of the support piece 2 is provided with two rotating shaft seats 13, and the two rotating shaft seats 13 are arranged on the two sides of the upper part of the support piece 2 in a bilateral symmetry manner; the bottom surface (under the concave surface) of the supporting head 1 is also provided with rotating shaft seats which are correspondingly matched with the rotating shaft seats 13 on the upper part of the supporting piece 2, the rotating shaft seats are all provided with shaft holes, the connecting rotating shaft 4 is inserted into the shaft holes of the rotating shaft seats of the supporting piece 2 and the supporting head 1, the supporting piece 2 and the supporting head 1 are hinged together, and the supporting piece 2 and the supporting head 1 can relatively rotate towards the hinge. A spring 12 is also arranged in the core support to expand the support 2. The spring 12 may be a torsion spring, a spring plate, a spring wire or other elastic mechanism capable of expanding the support member. When the spring is a torsion spring, the torsion spring can be arranged on the connecting rotating shaft 4, so that the supporting piece 2 and the supporting head 1 have elasticity and can be opened. If the spring 12 is an elastic sheet or an elastic wire, the elastic sheet or the elastic wire can be supported between the two supporting pieces 2 after being bent inwards; if the spring 12 is a steel wire with elasticity, two springs can be arranged and supported between the lower feet at the inner sides of the two supporting pieces 2, and the elastic wire can also be matched with a torsion spring for use, so that the spring can be thinner, and the influence on the growth of bone marrow is reduced.

The middle position of the bottom end of the support part 2 of the medullary core support is provided with a hanging hole 14, the hanging hole 14 is used for enabling the support part 2 to be hooked so as to realize inward compression of the two support parts and keep the compressed state, and the support parts can be bounced again after rotating until being sent into the designated position of the medullary cavity, so that the hanging hole is not a through long round hole and can be a through long strip hole or an oval hole. The hanging hole 14 can be designed to have different shapes and sizes at the inner end and the outer end, the outer end can be a circular hole or a hole with other shapes, the hole diameter of the outer end is larger than that of the inner end, the hole of the inner end cannot be circular, a hanging boss is required to be hooked, the hole of the inner end needs to be smaller than that of the circular hole of the outer end, and the shape of the hanging hole is preferably circular at the outer end and rectangular or elliptical at the inner end. The utility model discloses a couple on the pusher of medulla core eyelidretractor should pass through and the hook boss that the hook inner set up in can following the hanging hole of rectangular hole or elliptical aperture, breaks away from in can following the hanging hole as support piece rotation back couple, makes support piece can pop open.

The utility model discloses a pusher of medullary core eyelidretractor, including push rod 7, be provided with the card of centre gripping medullary core eyelidretractor and hold joint 6 on the top of push rod 7, be provided with the top along the length direction of push rod and change screw 8.

The clamping joint 6 of the pushing device comprises a vertical rod fixedly connected to the top end of a pushing rod 7, a clamping connecting rod 6.1 is fixedly connected to the upper portion of the vertical rod, the clamping connecting rod 6.1 is transversely and vertically arranged relative to the vertical rod of the clamping joint 6, clamping cross beams 6.2 are arranged at two ends of the clamping connecting rod 6.1, the clamping cross beams 6.2 are equivalent to hooks and used for hooking two supporting pieces of the medullary core supporter, the shape and the size of each clamping cross beam 6.2 correspond to the hanging holes 14 of the medullary core supporter supporting pieces 2, the side shape (viewed from the direction perpendicular to the clamping connecting rod 6.1) of each clamping cross beam 6.2 can be designed to be long strip-shaped or oval-shaped, the length of each clamping cross beam is matched with the length of the hole at the inner end of each hanging hole 14, and the width of each clamping cross beam. The length direction of the clamping beam 6.2 and the vertical rod of the clamping joint 6 form a certain angle, and the angle can be generally set to 45 degrees, and the included angle between the length direction of the clamping beam 6.2 and the axial direction (namely the length direction) of the clamping joint 6 can also be set to other angles, such as 30 degrees and 50 degrees, according to the angle of punching in the operation. When the medullary core support deflects a certain angle and the support part 2 of the medullary core support is compressed inwards, the clamping beam 6.2 can extend into the hanging hole 14, and when the medullary core support rotates a certain angle again, the clamping beam 6.2 is hooked on the hooking bosses 16 of the hanging hole 14 and cannot be pulled out, so that the medullary core support part 2 cannot be unfolded, therefore, the length of the clamping connecting rod 6.1 corresponds to the distance between the two hanging holes after the medullary core support part 2 is compressed, namely, the distance between the inner surfaces of the clamping beams 6.2 at the two ends of the clamping connecting rod 6.1 corresponds to the distance between the outer surfaces of the hooking bosses 16 in the two hanging holes after the medullary core support part 2 is compressed.

Because the length direction of the clamping beam 6.2 forms a certain angle with the vertical rod of the clamping joint 6, when the medullary core support needs to be installed in the pushing device, the direction of the hanging hole on the support part 2 can be aligned with the direction of the clamping beam 6.2, then the two support parts 2 of the medullary core support are compressed, the clamping beam 6.2 enters the hanging hole, and then the clamping beam is hooked on the hooking boss 16 at the inner end of the hanging hole 14 when the medullary core support is rotated. When the core supporter needs to be separated from the pushing device, the core supporter can rotate around the clamping connecting rod 6.1, when the length direction of the hanging hole 14 rotates to correspond to the length direction of the clamping beam 6.2, the shape of the hanging hole 14 is overlapped with the shape of the clamping beam 6.2, the two supporting pieces 2 are bounced open, and the core supporter is separated from the pushing device.

Of course, the utility model discloses an internal surface of hanging hole 14 can be the hole that does not have the hook boss (if be logical long rectangular hole or elliptical hole), and the card is held crossbeam 6.2 and can be stretched the surface of hanging hole 14 promptly support piece 2 on the surface like this, then through rotating the medulla prop ware, makes the card hold crossbeam 6.2 and hang on support piece 2's surface, also can realize and keep two support piece 2 compression states to the medulla prop ware, also can realize breaking away from the flick action.

The rotating screw 8 of the pushing device is a component for pushing and rotating the medullary core supporter. The jacking rotating screw rods 8 correspond to the clamping joints 6, the jacking rotating screw rods 8 are positioned on one side of the clamping joints 6 after extending out and are also positioned on the radial side surface of the clamping connecting rod 6.1, and the jacking rotating screw rods 8 are preferably symmetrically arranged by taking the clamping joints 6 as centers, so that when the two jacking rotating screw rods 8 extend out, the jacking rotating screw rods can simultaneously jack the medullary core supporter to fix the medullary core supporter; when the medullary core supporter needs to rotate, one of the jacking and rotating screw rods 8 can be loosened backwards and the other jacking and rotating screw rod can be pushed forwards, so that the medullary core supporter can stably rotate without the accident of early unhooking.

The bottom end and two sides of the supporting piece 2 of the medullary core supporting device can be respectively provided with a pushing and rotating lug boss 15, the pushing and rotating lug bosses 15 are mutually corresponding and symmetrical, and the pushing and rotating lug bosses on the two supporting pieces 2 have the same size; after the compressed bottom ends of the two supporting pieces 2 are close to each other, the rotating screw 8 of the pushing device can be conveniently pushed against the rotating bosses 15 of the two supporting pieces 2, so that the rotation of the medullary core supporter is convenient, and stable support is formed.

The jacking screw rod 8 can be arranged outside the push rod 7 and on two axial sides, but is preferably arranged inside the push rod 7, a long hole can be formed in the radial edge of the push rod 7 along the axial direction of the push rod 7, the long hole is positioned in the diameter direction of the push rod 7 and is oppositely arranged, the long hole can be a round hole, the jacking screw rod 8 is arranged in the round long hole, and the diameter of the round long hole is 0.1-0.3mm larger than that of the jacking screw rod. The elongated hole can define the turning screw 8, and the elongated hole can have an opening at the radial edge of the push rod 7, so that the diameter of the push rod 7 can be reduced.

The outer end (the end opposite to the clamping joint 6) of a pushing rod 7 of the pushing device can be fixedly connected with a limiting handle 5; set up the screw hole in the limit handle 5, top commentaries on classics screw rod 8 is connected with limit handle 5 through the screw thread, when rotating top commentaries on classics screw rod 8, top commentaries on classics screw rod 8 can stretch out or retract.

The push rod is connected with the limiting handle, and the vertical rod of the clamping joint is connected with the push rod and can be fixed through the pin 9.

The tail end (the outer side of the limiting handle) of the jacking screw rod 8 can be provided with a knurled handle 11, and the knurled handle 11 can be connected with the jacking screw rod 8 through threads and is locked through a locking nut 10.

The diameter of the pushing rod 7 of the pushing device should not be larger than the external dimension of the medullary core support, and the external dimensions of the two support pieces 2 are not larger than the external dimensions of the support head 1 when the medullary core support pieces 2 are compressed and folded, i.e. the folded support pieces 2 are compressed under the umbrella cover of the support head 1 and do not exceed the range covered by the umbrella cover of the support head 1. That is, when the two supporting members 2 are compressed and folded and mounted on the front end of the pushing rod 7 of the pushing device, the diameter of the outer edge of the spherical crown section of the supporting head 1 should be the largest size of the medullary core supporter and the pushing rod 7 (diameter), so that the medullary core supporter and the pushing rod 7 can smoothly pass through the surgical hole as long as the supporting head 1 can pass through the surgical hole.

The length of the supporting part of the medullary core supporting device can be slightly longer, when the supporting part 2 is expanded after the medullary core supporting device enters the medullary cavity of the femoral head, the bottom end of the supporting part is positioned at the lower part of the medullary cavity and is smaller than the diameter of the medullary cavity, so that the supporting part can be supported below the maximum diameter of the medullary cavity, and the medullary core supporting device cannot move up and down freely in the medullary cavity. The support member 2 may also be provided with outwardly directed barbs 19 at the bottom, the barbs 19 being located at the outer side of the bottom of the support member 2, at the edge of the spherical cap surface, the number of barbs 19 may be set as appropriate, and one or two barbs may be provided on each support member 2, but preferably a plurality of barbs 19 may be provided, and a plurality of barbs 19 may form one or two rows. After the medullary core supporting device enters the medullary cavity, when the supporting part 2 is opened, the barbs 19 can penetrate into the inner surface of the medullary cavity to fix the medullary core supporting device, and the outer surface of the medullary core supporting device is attached to the surface of the medullary cavity hole dug in advance.

The specific size or shape of the components of the utility model can also be changed slightly, for example, the spherical crown surface of the supporting head 1 and the supporting piece 2 can not be spherical crown, but also can be elliptical crown, even plane or other shapes, as long as the components can be attached to the inner wall of the medullary cavity; the connection mode of the supporting head 1 and the supporting piece 2 can also adopt other hinge modes, or can also realize the function of the structure through an elastic soft connection mode; the shape of the hanging hole 14 on the supporting piece 2 and the shape of the clamping beam 6.2 can have various shapes (generally not a perfect circle), and the functions can be realized as long as the clamping beam 6.2 can hook the two compressed supporting pieces 2 and can bounce the supporting pieces 2 at proper positions; the connecting mode between the clamping connecting rod 6.1 of the pushing device and the vertical rod of the clamping joint 6 can be fixed connection or movable connection, the angle between the clamping beam 6.2 and the vertical rod of the clamping joint 6 can be changed by rotating the clamping connecting rod 6.1 during connection, and only the vertical rod of the clamping connecting rod 6.1 and the vertical rod of the clamping joint 6 can be locked, so that the angle relation between the medulla core support and the pushing rod when the medulla core support bounces open in the medullary cavity is changed, and the pushing device can adapt to surgical holes with different angles. Therefore, the utility model discloses a on the basis to shape, size, or the replacement of connected mode, all belong to the scope of protection of the utility model.

Claims

1. A medullary core support, comprising: comprises a supporting head (1) with a spherical crown-shaped outer surface and supporting pieces (2) which are positioned at two sides of the supporting head (1) and can be bounced.

2. The medullary core support of claim 1, wherein: the supporting piece (2) is hinged at the bottom of the supporting head (1) in a bilateral symmetry mode through the connecting rotating shaft (4), and the supporting piece (2) is opened through the spring (12).

3. The medullary core support of claim 2, wherein: the support piece (2) is hinged with the support head (1) through a connecting rotating shaft (4) and a rotating shaft seat (13) respectively arranged on the support piece (2) and the support head (1), and the connecting rotating shaft (4) is inserted in shaft holes of the support piece (2) and the rotating shaft seat of the support head (1).

4. A medullary support according to any of claims 2 or 3, wherein: the spring (12) is a torsion spring, an elastic sheet or an elastic wire; when the spring (12) is an elastic sheet or an elastic wire, the spring (12) is supported between the two supporting pieces (2).

5. The medullary core support of claim 1, wherein: the bottom end of the supporting piece (2) is provided with a hanging hole (14) which can enable the supporting piece to be hooked.

6. The medullary core support of claim 5, wherein: the hanging hole (14) is a circular hole, and a hook boss (16) is arranged at the inner end of the circular hole.

7. A medullary support according to any of claims 5 or 6, wherein: the inner end of the hanging hole (14) is a long hole or an elliptical hole.

8. The medullary core support of claim 1, wherein: two sides of the bottom end of the supporting piece (2) are respectively provided with a pushing and rotating lug boss (15) which correspond to each other.

9. The medullary core support of claim 1, wherein: the surfaces of the supporting head (1) and the supporting piece (2) are respectively provided with a through hole (18) for placing active broken bones; the surfaces of the supporting head (1) and the supporting piece (2) are provided with micropores for the growth and fusion of bone marrow.

10. The medullary core support of claim 9, wherein: the size of the micropores is 90-300 mu m.

11. The medullary core support of claim 1, wherein: the bottom of the support member (2) is provided with a row of outward barbs (19).

12. The medullary core support of claim 1, wherein: the outer surfaces of the supporting head (1) and the supporting piece (2) are both spherical crown shapes, and when the supporting piece (2) is opened, the outer surface of the supporting piece (2) is in contact with the outer surface of the supporting head (1) to form a smooth and gentle transitional spherical crown surface; when the supporting part (2) is unfolded, the bottom end of the supporting part is positioned at the position, which is smaller than the diameter of the medullary cavity, at the lower part of the medullary cavity; the peripheral size of the two supporting pieces (2) is not larger than the excircle size of the supporting head (1) when the supporting pieces (2) are compressed and folded.

13. A propelling movement device of medullary core supporter is characterized in that: the novel medullary core clamping device comprises a pushing rod (7), a clamping joint (6) for clamping a medullary core supporter is arranged at the top end of the pushing rod (7), and a jacking screw rod (8) which corresponds to the clamping joint (6) and extends out to be located on the side face of the clamping joint (6) is arranged in the length direction of the pushing rod.

14. The push device of the medullary core support of claim 13, wherein: the clamping joint (6) comprises a vertical rod fixedly connected to the top end of the pushing rod (7), a clamping connecting rod (6.1) transversely arranged relative to the vertical rod is fixedly connected to the upper portion of the vertical rod, and clamping cross beams (6.2) used for hooking the medullary core support are arranged at two ends of the clamping connecting rod (6.1); the length direction of the clamping beam (6.2) and the vertical rod of the clamping joint (6) form a certain angle; the jacking screw rod (8) is positioned on the radial side surface of the clamping connecting rod (6.1).

15. The push device of a medullary core support of claim 14, wherein: the side surface of the clamping beam (6.2) is in a strip shape or an oval shape corresponding to the hanging hole (14) on the support of the medullary core support.

16. A pushing device for a medullary core support as claimed in any one of claims 13 to 15, wherein: the two jacking screw rods (8) are symmetrically arranged by taking the clamping joint (6) as the center.

17. A pushing device for a medullary core support as claimed in any one of claims 13 to 15, wherein: the jacking screw rod (8) is arranged in a circular long hole which is positioned in the pushing rod (7) and is opposite to the pushing rod in the radial direction.

18. A pushing device for a medullary core support as claimed in any one of claims 13 to 15, wherein: the outer end of the pushing rod (7) is fixedly connected with a limiting handle (5), and the jacking screw rod (8) is connected with the limiting handle (5) through threads; the tail end of the jacking screw rod (8) is provided with a knurled handle (11).

19. A pushing device for a medullary core support as claimed in any one of claims 13 to 15, wherein: the diameter of the push rod (7) is not larger than the external dimension of the medullary core supporter.