CN218187042U

CN218187042U - Holding device

Info

Publication number: CN218187042U
Application number: CN202221969089.9U
Authority: CN
Inventors: 许振山; 齐继宗; 宋勇
Original assignee: Bonovo Orthopedics Inc
Current assignee: Bonovo Orthopedics Inc
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-01-03
Anticipated expiration: 2032-07-28

Abstract

The invention relates to the technical field of medical instruments for holding and taking an interbody fusion cage, in particular to a holding and taking device which comprises a screw, an inner sleeve, an outer sleeve, a knob and a locking block, wherein a clamping joint clamped with an inner supporting block in the fusion cage is arranged at the front end of the outer sleeve, the inner sleeve is arranged in the outer sleeve, the inner sleeve and the outer sleeve are connected in a sliding and non-rotating mode, the rear end part of the inner sleeve extends out of the outer sleeve and is in threaded connection with the knob, fixing teeth are arranged on the rear end surface of the inner sleeve, the screw is inserted into the inner sleeve, the front end of the screw extends out of the outer sleeve, the rear end of the screw extends out of the inner sleeve and is provided with the locking block, and locking teeth meshed with the fixing teeth are arranged on the front end surface of the locking block.

Description

Holding device

Technical Field

The invention relates to the technical field of intervertebral fusion cage holding and taking medical instruments, in particular to a holding and taking device which is simple in structure, good in holding and taking effect, simple and convenient in holding and taking operation and capable of improving bone grafting efficiency.

Background

As is well known, in clinical orthopedics, spinal degeneration is common, and intervertebral disc degeneration, spinal stenosis, spondylolisthesis and spinal cord or nerve root compression are common, so that the patients need surgical treatment, the compression is thoroughly removed, the physiological curvature of the spine is restored, and the spinal stability is guaranteed. Other patients with spinal deformities, trauma, tumors, revision surgery and infections sometimes also undergo interbody fusion to stabilize the lumbar segment. The interbody fusion cage has better curative effect on the spine diseases, is simple to operate, convenient to use, high in fusion rate, free of complications of bone grafting fusion, and is widely applied and clinical.

The existing interbody fusion cage is matched with a holding device to be used, the interbody fusion cage comprises an inner supporting block and an outer expanding block, the holding device realizes the opening function by rotating the inner supporting block through threads in the holding and taking process, the existing interbody fusion cage is in an initial state, the inner supporting block and the outer expanding block are in a connection state, the holding device drives the inner supporting block to move through the rotation of a handle, the opening is realized, the existing inner supporting block and the outer expanding block are in an initial state connection, therefore, the expanding effect is not good, if the inner supporting block and the outer expanding block are in a separated connection mode, the opening space can be increased, the opening effect is ensured, but the opening effect can not be realized by the corresponding holding device, and the existing holding device only holds the expanding function and does not have the bone grafting function.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides the holding device which has the advantages of simple structure, good holding and taking effect, simple and convenient holding and taking operation and improvement of bone grafting efficiency.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a hold and get ware, its characterized in that hold and get ware include screw rod, interior sleeve pipe, outer tube, knob, locking block, the front end of outer tube be equipped with fuse the joint of interior supporting shoe joint in the ware, the outer tube in be equipped with interior sleeve pipe, interior sleeve pipe slides and does not rotate with the outer tube and is connected, interior sleeve pipe rear end portion stretch out the outer tube and with knob threaded connection, interior sheathed tube rear end face is equipped with fixed tooth, the intraductal screw rod that inserts of endotheca, the outer tube is stretched out to the front end of screw rod, the rear end of screw rod stretches out interior sleeve pipe and is equipped with the locking block, the preceding terminal surface of locking block be equipped with the locking tooth of fixed tooth meshing, realize the irrotational locking of screw rod, interior sleeve pipe and outer tube through locking tooth and fixed tooth meshing.

The rear end of the screw is provided with at least two marble grooves along the axis direction of the screw, the locking block is provided with a marble mounting hole, a marble, a spring and a sealing cover are arranged in the marble mounting hole, the marble is connected with the sealing cover through the spring, and the sealing cover is fixed on the marble mounting hole.

The screw is provided with a guide profile, the locking block is internally provided with a guide groove surface matched with the guide profile, and the screw is connected with the locking block in a non-rotating manner in a sliding manner through the matching of the guide profile and the guide groove surface.

The rear end of the screw rod is provided with an interface which is connected and matched with the quick-change handle, and the screw rod is connected with the quick-change handle through the interface.

The clamping joint at the front end of the outer sleeve comprises at least two clamping elastic sheets, the clamping elastic sheets are distributed in the circumferential direction of the end part of the outer sleeve, the rear end of each clamping elastic sheet is connected with the outer sleeve, a convex clamping raised head is arranged on the outer side of the front end of each clamping elastic sheet, and the clamping of the inner supporting block is realized through the matching of the clamping raised head and the clamping elastic sheets.

Due to the adoption of the structure, the bone grafting device has the advantages of simple structure, good holding and taking effect, simple and convenient holding and taking operation, improvement on bone grafting efficiency and the like.

Drawings

Fig. 1 is a schematic view of the structure of the present invention for mounting the inner and outer support blocks.

FIG. 2 is a schematic view of the present invention without the inner support block and the outer extension block installed.

Fig. 3 is a schematic view of the structure of the screw.

Fig. 4 is a schematic structural view of the locking block.

Fig. 5 is a schematic view of the inner sleeve.

Fig. 6 is a schematic structural view of the outer sleeve.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in the attached drawing, the extractor is characterized by comprising a screw 1, an inner sleeve 2, an outer sleeve 3, a knob 4 and a locking block 5, wherein a clamping joint connected with an inner support block 16 in a fusion device is arranged at the front end of the outer sleeve 3, the inner sleeve 2 is arranged in the outer sleeve 3, the inner sleeve 2 and the outer sleeve 3 slide and are not rotationally connected, the rear end of the inner sleeve 2 extends out of the outer sleeve 3 and is in threaded connection with the knob 4, a fixed tooth 6 is arranged on the rear end face of the inner sleeve 2, the screw 1 is inserted into the inner sleeve 2, the front end of the screw 1 extends out of the outer sleeve 3, the rear end of the screw 1 extends out of the inner sleeve 2 and is provided with the locking block 5, a locking tooth 7 meshed with the fixed tooth 6 is arranged on the front end face of the locking block 5, and non-rotation locking of the screw 1, the inner sleeve 2 and the outer sleeve 3 is realized by meshing of the locking tooth 7 and the fixed tooth 6.

Further, 1 rear end of screw rod be equipped with two at least marble grooves 8 along 1 axis direction of screw rod, locking block 5 on be equipped with marble mounting hole 9, be equipped with marble, spring and closing cap in the marble mounting hole 9, the marble be connected with the closing cap through the spring, the closing cap is fixed on marble mounting hole 9.

Further, the screw 1 is provided with a guide profile 10, the locking block 5 is provided with a guide groove surface 11 matched with the guide profile 10, and the screw 1 slides in the locking block 5 without rotating connection through the matching of the guide profile 10 and the guide groove surface 11.

Further, the rear end of the screw rod 1 is provided with a connector 12 which is connected and matched with the quick-change handle, and the screw rod 1 is connected with a quick-change handle 15 through the connector 12.

Furthermore, the clamping joint at the front end of the outer sleeve 3 comprises at least two clamping elastic sheets 13, the clamping elastic sheets 13 are distributed on the circumferential direction of the end part of the outer sleeve 3, the rear end of each clamping elastic sheet 13 is connected with the outer sleeve 3, a raised clamping convex head 14 is arranged on the outer side of the front end of each clamping elastic sheet 13, clamping of the inner supporting block 16 is realized through the matching of the clamping convex head 14 and the clamping elastic sheet 13, the clamping elastic sheets can be clamped in the grooves on the outer expansion blocks in an unfolding mode after the screws are inserted, and can be retracted inwards to be separated from the grooves and pulled out after the screws are pulled out.

The holding method of the holder comprises the following steps:

(1) Assembling the holder: inserting the held screw 1 into an inner sleeve 2, inserting the inner sleeve 2 into an outer sleeve 3, installing a knob 4 at the rear part of the inner sleeve 2, and installing a locking block 5 at the rear part of the screw 1; the rear end of the screw rod 1 is connected with a handle 15;

(2) Fixing the inner support block 16: clamping a clamping joint at the front end of an outer sleeve 3 of the holder on an inner supporting block 16;

(3) Fixing the outer expansion block: inserting the front end of the screw rod 1 into the outer expansion block and fixedly connecting the front end of the screw rod with the thread at the front end of the outer expansion block 17, and then rotating the outer sleeve 3 and the inner sleeve 2 to align the inner supporting block 16 with the outer expansion block 17;

(4) Locking: after the alignment in the step (3), the locking block 5 is pushed forward to the front of the screw rod 1, so that locking teeth 7 on the locking block 5 are meshed with fixing teeth 6 at the rear end of the inner sleeve 2, and the screw rod 1, the inner sleeve 2 and the outer sleeve 3 are locked and cannot rotate mutually;

(5) The inner support block 16 advances: rotating the knob 4, moving the knob 4 towards the front along the inner sleeve 2, pushing the outer sleeve 3 by the knob 4, pushing the inner support block 16 to advance by the outer sleeve 3, and further pushing the inner support block 16 into the outer expansion block 17;

(6) Separation: the screw 1 is rotated reversely to separate the screw 1 from the outer expansion block 17, and the screw 1 is drawn out, at this time, the inner sleeve 2 is in a hollow state, and the bone grafting of the fusion device can be performed through the inner cavity of the inner sleeve 2.

The specific implementation process is as follows: the screw 1 is designed to be provided with threads for holding the outer expanding block 17 at the front end part of the screw 1, the rear end part of the screw 1 is provided with a pit matched with a ball in the locking block 5 and a flat rotation limiting structure, and the rear end part of the screw 1 is provided with a matching interface 12 with the quick-change handle 15;

the front end part of the inner sleeve 2 is provided with a D-shaped outer shape which can be matched with a 3D-shaped inner hole of the outer sleeve, the rear end part of the inner sleeve 2 is provided with an external thread matched with the knob 4, and the rear end surface of the inner sleeve 2 is provided with a fixed tooth 6 meshed with a locking tooth 7 arranged on the front end surface of the locking block 5;

the front end part of the outer sleeve 3 is provided with a clamping joint which can hold the inner supporting block 16, and the shape of a middle hole D of the outer sleeve 3 is matched with the shape of a 2D of the inner sleeve, so that the inner sleeve 3 and the outer sleeve can move back and forth but can not rotate independently but can only rotate together;

the locking block 5 is provided with a marble which can be matched with a marble groove 8 arranged on the screw rod 1 for front and back positioning, and a flat inner hole is arranged in the locking block 5 and is matched with the screw rod 1 for limited rotation;

the knob 4 is provided with internal threads which can be matched with the external threads of the inner sleeve 2 and can push the outer sleeve 3 forward when rotating;

when the bone grafting device is used, the clamping joint of the outer sleeve 3 is inserted into the inner support block 16, so that the inner support block 16 is held, then the screw 1 is used for carrying out thread screwing holding on the outer expansion block 17, at the moment, the outer sleeve 3 can be rotated to adjust whether the direction of the inner support block 16 is aligned with the cavity direction of the too expansion block (before the locking block 5 and the fixed teeth 6 of the inner sleeve 2 are not matched, the inner sleeve 3 and the outer sleeve 3 can rotate relative to the screw 1 simultaneously, the inner sleeve 3 and the outer sleeve 3 can only move back and forth and cannot rotate mutually due to flat matching), after alignment, the locking block 5 is pushed forwards from the marble groove 8 at the rear of the screw 1 to the marble groove 8 at the front, the locking block 5 is meshed with the fixed teeth 6 of the inner sleeve 2, so that the screw 1 and the inner sleeve 3 can not be locked and can not rotate mutually, the knob 4 is rotated, the outer sleeve 3 is pushed forwards along the threads of the inner sleeve 2, so that the outer support block 16 of the outer sleeve 3 is pushed into the outer expansion block 17, the screw 1 is rotated reversely, the screw 1 is separated from the outer expansion block 17, the screw 1 is pulled out, the inner sleeve 2 is in a hollow state, and the bone grafting device can be implanted through the hollow hole.

The holder of the invention needs to respectively hold the inner support block 16 and the outer expansion block 17 in the fusion device, and carries out long-distance pushing combination and opening after entering a human body, thus ensuring that a small-diameter channel passes through the holder, the outer expansion block 17 is held and taken through the screw 1, the inner support block 16 is held and taken through the outer sleeve 3, the outer sleeve 3 and the inner sleeve 2 are matched through a D-shaped hole, and the holder has the advantages that (1) the position of the outer expansion block 17 and the inner support block 16 can be corrected and adjusted by rotating the inner sleeve 2, (2) the toothed locking of the inner sleeve 2 can be carried out by pushing the locking block 5 after the alignment, thereby realizing the position locking of the outer expansion block 17 and the inner support block 16, the knob 4 is in threaded fit with the inner sleeve 2, the inner sleeve 2 can be pushed by rotating the knob 4, the inner supporting block 16 is held by the inner sleeve 2 to move relative to the screw rod 1, so that the inner supporting block 16 is placed into the outer expansion block 17, after the combination of the implant is completed, (3) components such as the screw rod 1, the inner sleeve 2 and the like can be pulled out, only the outer sleeve 3 holding the inner supporting block 16 is reserved, bone grafting filling can be carried out on a fusion device product through the outer sleeve 3, the holder disclosed by the invention has the advantages that the inner pushing block is pushed into the outer expansion block, the clamping mode is simple and convenient, the outer expansion block is directly clamped through the inner expansion of the screw rod or the clamping convex head of the arc-shaped elastic sheet, the stability of the structure is ensured, additional parts are not required to be passively clamped, and the bone grafting device has the advantages of simple structure, stability after being unfolded, high strength after being unfolded, convenience in implantation and the like due to the adoption of the structure.

Claims

1. The utility model provides a hold and get ware, its characterized in that hold and get ware include screw rod, interior sleeve pipe, outer tube, knob, locking block, the front end of outer tube be equipped with fuse the joint of interior supporting shoe joint in the ware, the outer tube in be equipped with interior sleeve pipe, interior sleeve pipe slides and does not rotate with the outer tube and is connected, interior sleeve pipe rear end portion stretch out the outer tube and with knob threaded connection, interior sheathed tube rear end face is equipped with fixed tooth, the intraductal screw rod that inserts of endotheca, the outer tube is stretched out to the front end of screw rod, the rear end of screw rod stretches out interior sleeve pipe and is equipped with the locking block, the preceding terminal surface of locking block be equipped with the locking tooth of fixed tooth meshing, realize the irrotational locking of screw rod, interior sleeve pipe and outer tube through locking tooth and fixed tooth meshing.

2. The holder according to claim 1, wherein the rear end of the screw has at least two ball grooves along the axis of the screw, the locking block has ball mounting holes, the ball mounting holes have balls, springs and a sealing cover, the balls are connected to the sealing cover through the springs, and the sealing cover is fixed to the ball mounting holes.

3. The holder according to claim 1, wherein the screw has a guide profile, the locking block has a guide groove surface engaged with the guide profile, and the screw is slidably and non-rotatably coupled in the locking block by engagement of the guide profile with the guide groove surface.

4. The holder according to claim 1, wherein the rear end of the screw is provided with a connector which is connected and matched with the quick-change handle, and the screw is connected with the quick-change handle through the connector.

5. The holder according to claim 1, wherein the engaging joint at the front end of the outer sleeve comprises at least two engaging elastic pieces, the engaging elastic pieces are distributed in the circumferential direction of the end of the outer sleeve, the rear end of the engaging elastic piece is connected with the outer sleeve, a convex engaging raised head is arranged outside the front end of the engaging elastic piece, and the engaging of the inner supporting block is realized by the engaging of the engaging raised head and the engaging elastic piece.