CN2394586Y

CN2394586Y - Far end screw hole aiming device for fixing nail in bone marrow

Info

Publication number: CN2394586Y
Application number: CN99244970U
Authority: CN
Inventors: 苏振宾
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-24
Filing date: 1999-09-24
Publication date: 2000-09-06
Anticipated expiration: 2009-09-24

Abstract

The utility model relates to a sighting device which is mainly an external adjusting member and is composed of positioning arms, an adjusting block, an extension rod, a second proofreading block and positioning components, wherein one end of the positioning arm is provided with an axis hole and a positioning hole which are mutually vertical and arranged eccentrically. The adjusting block is arranged on the axis hole of the positioning arm, the axis hole corresponding to the positioning arm extends a shaft rod, side wall of the adjusting block is provided with a perforation and a positioning hole which are mutually vertical and arranged eccentrically. The extension rod penetrates through the adjusting block, and one end of the extension rod is provided with a first proofreading block. A second proofreading block penetrates through the extension rod and is provided with a perforation and a positioning hole which are mutually vertical and arranged eccentrically. Accordingly, the utility model has the advantages of steady, quick collimation, simple operation and increased accuracy of adjustment.

Description

Bone marrow internal fixation nail far-end screw sight

This utility model relates to a kind of sight.

At present, the skeleton that supports the human body framework very easily comes to harm when impacted by gravity, and phenomenons such as generation fracture, on most of orthopaedics therapies to the processing mode of comminuted lower limb long bone shaft fracture, mostly adopt implantable bone intramedullary pin in bone marrow, and cooperation staple, the thigh bone that fractures with order obtains certain fixing, follow closely in general in the time need drilling through the hole of staple in the shank outer end behind the implantation thigh bone bone marrow, often need to borrow the Kong Weihou of X-ray machine nail in the outer end perspective is sought, constructed in position, correct for borehole hole again, the most tasks of whole process need, and just in case the loosening error that causes of conductor screw, then must dial again again and squeeze into, very trouble is bothersome, and when X-ray machine was followed closely the position, hole in detecting, operator got and often expose to the open air under the width of cloth is penetrated light source irradiation, cause health to come to harm virtually.

As shown in Figure 1, a kind of intramedullary pin screw localizer, break away from and use X-ray machine perspective location, its localizer 1 main connecting support 11 that protrudes that is provided with on intramedullary pin 10 end limits, be movably equipped with an applying seat 121 at connecting support 11 ends, these applying seat 12 side chains close the universal adjustment seat 13 that an angle adjustable is set, this adjusts the sealed again extension bar 14 of seat 13 ends, these extension bar 14 other ends are adjusted seat 15 with another and are formed another extension bar 16 of connection, be overlapped on a sleeve pipe 18 ends at these extension bar 16 other ends with another adjustment seat 17, a sheathed again slide bar 19 in the sleeve pipe 18, and at slide bar 19 and be nested with and insert locating rod A in 18 respectively, borrow the universal adjustment of multisection type to constitute, can make intramedullary pin 10 and locating rod A behind the folding dress, still can keep a relative position, reach guiding position, staple hole, location; Above-mentioned localizer 1 has used number to adjust

seat

13,15,17 overlap joint

number extension bars

14,16 and sleeve pipe 18, again by sleeve pipe 18 cover group slide bars 19, for can form polytropism adjust sleeve pipe 18 and slide bar 18 involutory intramedullary pins 10 position bar A wear right, so, the adjustment joint of this localizer 1 is a lot of, loaded down with trivial details, if promptly lose the accuracy of original check and correction at a joint mobilization, and easily cause overall architecture built on the sand, and the anchor point search of this sleeve pipe 18 and slide bar 19 also is difficult for finding for the adjustment gap in number joint produces to cause, and adjusts seat 13 again, 15, utilizing in opposite directions on 17, the fluted disc engagement can't cooperate different holes distance, do more accurate fine setting on the different axis.

In view of this, the purpose of this utility model provides a kind of bone marrow internal fixation nail far-end screw sight, and it is to utilize the outer positioning component of regulating member to draw outward can to hold to adjust piece, extension rod and second proof-reading block and reach strong fix.

The purpose of this utility model is achieved in that a kind of bone marrow internal fixation nail far-end screw sight, by an intramedullary pin, one combination member and an outer member of regulating are formed, wherein combination member is provided with two ends in the same way, and be connected with intramedullary pin and the outer member of regulating respectively, it is characterized in that: regulating member outward is by registration arm, adjust piece, extension rod, second proof-reading block and positioning component are formed, wherein registration arm one end provides axis hole and locating hole, this axis hole and locating hole vertical and eccentric setting mutually, this adjustment piece is arranged on the axis hole of registration arm, the axis hole of its corresponding registration arm prolongs the protruding axostylus axostyle that has, perforation and locating hole have been provided at sidewall, this perforation and locating hole vertical and eccentric setting mutually; Extension rod is located on the adjustment piece and the one end is provided with first proof-reading block; Second proof-reading block is located on the extension rod, and this second proof-reading block has provided vertical with locating hole and the eccentric setting of perforation and locating hole and this perforation again; Positioning component is arranged on registration arm and adjusts on the locating hole of the piece and second proof-reading block, and this positioning component is made up of pilot pin and nut, and wherein the axis hole of the involutory registration arm of pilot pin sidewall all is provided with recess with the perforation of the adjustment piece and second proof-reading block.

Owing to adopt such scheme: make aiming firmly rapid, simple to operate and can promote the adjustment accuracy.

Below in conjunction with drawings and Examples this utility model is further specified.

The three-dimensional combination figure that Fig. 1 is known.

Fig. 2 this utility model exemplary embodiments exploded view.

Fig. 3 this utility model exemplary embodiments three-dimensional combination figure.

Fig. 4 this utility model exemplary embodiments is regulated the member cutaway view outward.

Fig. 5 this utility model exemplary embodiments is adjusted the piece assembled sectional view.

The adjustment sketch map of Fig. 6 this utility model exemplary embodiments extension rod.

A kind of user mode figure of Fig. 7 this utility model exemplary embodiments.

The another kind of user mode figure of Fig. 8 this utility model exemplary embodiments.

Among the figure: 1 localizer, 10 intramedullary pins, 11 connecting supports, 12 applying seats, 13 adjust seat, 14 extension bars, 15 adjust seat, 16 extension bars, 17 adjust seat, 18 sleeve pipes, 19 slide bars, the A locating rod, 2 intramedullary pins, 20 inner bolt holes, 21 draw-in grooves, 22 proximal portion screw holes, 23 far-end screws, 3 combination members, 30 connecting supports, 300 through holes, 301 fixture blocks, 302 trips, 303 plates, 304 is long-armed, 3040 locating holes, 305 guide holes, 31 pilot pins, 310 external screw threads, 311 tooth card bodies, 32 holders, 320 pilot pins, 321 spiral shell spares, the 4 outer members of regulating, 40 registration arm, 400 fixing holes, 401 axis holes, 402 locating holes, 41 adjust piece, 410 axostylus axostyles, 411 perforation, 412 locating holes, 42 extension rods, 420 first proof-reading block, 4200 guide holes, 43 second proof-reading block, 430 guide holes, 431 perforation, 432 locating holes, 44 positioning components, 440 pilot pins, 4400 threaded bodies, 4401 recesses, 441 nuts, the B guide pin bushing, the C staple.

At first, as shown in Figure 2, present embodiment is mainly by an intramedullary pin 2, one combination member 3 and an outer member 4 of regulating are formed, wherein intramedullary pin 2 one ends are provided with inner bolt hole 20, these inner bolt hole 20 both side edges are provided with draw-in groove 21 relatively, be provided with proximal portion screw holes 22 at inner bolt hole 20 rears, the other end of intramedullary pin 2 is provided with the first far-end screw 23 and the second far-end screw 24, one combination member 3 is connected intramedullary pin 2 one ends, mainly by a connecting support 30, one pilot pin 31 and a holder 32 are formed, wherein connecting support 30 1 sides are formed with through hole 300, these through hole 300 terminal edge are convexly equipped with fixture block 301 to the draw-in groove 12 with intramedullary pin 2, the built-in trip 302 in connecting support 30 stage casings, this trip 302 can be along the protruding place, through hole 300 outer ends that places, trip 302 other ends form movable group and establish a plate 303, extend one long-armed 304 at connecting support 30 opposite side parallel via holes 300, these long folds in a garment 304 ends are provided with locating hole 3040, at the long-armed 304 inner oblique guide holes 305 that are connected, one pilot pin 31 is worn group in the through hole 300 of connecting support 30, one end is provided with external screw thread 310, the protruding tooth card body 311 of another end ring, 32 groups of one holders are located at long-armed 304 locating hole 3040 of connecting support 30, mainly be provided with a pilot pin 320 and a spiral shell spare 321, one outer regulate 4 groups of members be located at combination member 2 long-armed 304 on, mainly be provided with by a registration arm 40, one adjusts piece 41, one extension rod 42 and second proof-reading block 43 and array positioning component 44 constitute, wherein registration arm 40 1 end end faces are provided with two pairs of fixing holes 400, and the other end has vertically provided axis hole 401 and has laterally provided locating hole 402, this axis hole 401 is vertical and eccentric setting mutually with locating hole 402, one adjusts on the axis hole 401 that 41 groups of pieces are located at registration arm 40, the axis hole 401 of its corresponding registration arm 40 below prolong the protruding axis hole 410 that has, side arm provide level to perforation 411 and locating hole 412, this perforation 411 is vertical and relative eccentric the setting with locating hole 412, one extension rod 42 is worn group and is being adjusted on the piece 41, at one end be provided with first proof-reading block 420, this first proof-reading block 420 is provided with guide hole 4200, one second proof-reading block 43 is worn group on extension rod 42, mainly vertically provided a guide hole 430, level is to having provided perforation 431 and locating hole 432, this perforation 431 is vertical with locating hole 432 and eccentric mutually the setting, the array positioning component is located at registration arm 40 for 44 groups, adjust the locating hole 402 of the piece 41 and second proof-reading block 43,412, on 432, mainly be provided with by a pilot pin 440 and a nut 441 and combined, wherein pilot pin 440 1 ends cooperation nut 441 is provided with threaded body 4400, one sidewalls and is provided with recess 4401.

During combination, shown in Fig. 2-5, only need earlier pilot pin 31 to be inserted in the through hole 300 of connecting support 30, making its pilot pin 31 1 side external screw threads be protruding puts in through hole 300 1 outer ends, pilot pin 31 another end tooth card bodies 311 then position are in trip 302 places in through hole 300 other ends outside of connecting support 30, make an end inner bolt hole 20 of intramedullary pin 2 be the external screw thread 310 of involutory pilot pin 31 again, and with the tooth card body 311 of turn pilot pin 31, screw inner bolt hole 20 to reach external screw thread 310, the draw-in groove 21 of its intramedullary pin 2 also can be fixture block 301 location that holds of connecting support 30, to prevent intramedullary pin 2 turns, make plate 303 pressings of connecting support 30 be the drive trip 302 overhanging tooth card bodies 311 that support pilot pin 31 again, prevent pilot pin 31 rotations, so, the promptly simple and easy intramedullary pin 2 of reaching is connected with combination member 3; Moreover, the outer independent combination of regulating member 4, earlier the pilot pin 440 of one group of positioning component 44 is worn the locating hole 402 of registration arm 40, and the recess 4401 that makes pilot pin 440 is axis hole 401 inboards in the face of locating hole 402 through holes, it is inboard clear and coherent without hindrance to form axis hole 401, secondly, the axostylus axostyle 410 of adjusting piece 41 is inserted in the axis hole 401 of registration arm 40, make the nut 441 of positioning component 44 be screwed in pilot pin 440 1 ends again and expose threaded body 4400 in registration arm 40 outsides, and make packing make pilot pin 440 outwards move (pilot pin 440 partly threaded body 4400 is inserted in the locating hole 402), the recess 4401 that forms pilot pin 440 moves in axis hole 401, and then, the recess 4401 of pilot pin 440 is the axostylus axostyle 410 that holds adjustment piece 41, make adjustment piece 41 reach the location, pilot pin 440 with another group positioning component 44 is the locating hole 432 that wears second proof-reading block 43 again, and the recess 4401 that makes pilot pin 440 is in the face of locating hole 432 logical perforation 431 inboards of establishing, it is inboard clear and coherent without hindrance to form perforation 431, make extension rod 42 wear the perforation 431 of second proof-reading block 43 again, the nut 441 of this positioning component 44, and be screwed in pilot pin 440 1 ends and expose threaded body 4400 at second proof-reading block, 43 sidewalls, and carry out packing pilot pin 440 and promptly outwards move (pilot pin 440 partly threaded body 4400 is inserted in the locating hole 432), the recess 4401 that forms pilot pin 440 is in perforation 431 bias internals, must give and hold extension rod 42, second proof-reading block 43 is held on the extension rod 42 surely, pilot pin 440 with one group positioning component 44 wears the locating hole 412 of adjusting piece 41 simultaneously, and the recess 4401 that makes pilot pin 440 is in the face of leading to perforation 411 inboards of establishing with locating hole 412, it is inboard clear and coherent without hindrance to form perforation 411, the extension rod 42 that will be located in second proof-reading block 43 more wears the perforation 411 of adjusting piece 41, and the nut 441 that makes positioning component 44 is screwed pilot pin 44 1 ends and is exposed and adjusting piece 41 lateral threaded bodies 440, and carry out packing and make its pilot pin 440 outwards move (pilot pin 440 partly threaded bodies 4400 is interior for inserting locating hole 412), the recess 4401 that forms pilot pin 440 is in perforation 411 bias internals, and then hold extension rod 42, extension rod 42 is held in surely adjusts on the piece 41, so, promptly finishing outer integral body group of regulating member 4 establishes, to regulate outward again member 4 registration arm 40 involutory connecting supports 30 long-armed 304, and the fixing hole 400 that makes registration arm 40 is involutory long-armed 304 locating hole 3040, again the pilot pin 320 of holder 32 and spiral shell spare 320 are inserted respectively and screw, as mentioned above, promptly finish whole assembling.

Shown in Fig. 6-8, during use, the intramedullary pin 2 that is cooperated is a kind of implantation bone marrow apparatus of commonly using, and after improvement, only need plate to move plate 303 and turn pilot pin 31, can reach separating or being connected of intramedullary pin 2 and combination member 3, and can be by the length demand of different bones, do fixing hole 400 involutory long-armed 304 locating hole 3040 windings of diverse location on its registration arm 40, make its outer member 4 of regulating have much elongation adjusting effect, moreover, make extension rod 42 adjust corresponding intramedullary pin 2, at first, packing is unscrewed (recess 4401 of pilot pin 440 breaks away from the axostylus axostyle 410 that holds adjustment piece 41) at the positioning component 44 of the locating hole 402 of registration arm 40, make its axis hole 410 of adjusting piece 41 can be according to axis hole 401 turns of registration arm 40, but form extension rod 42 levels left, the right adjustment, make 412 groups of positioning components of establishing 44 of locating hole of adjusting piece 41 unscrew (recess 4401 disengagings of pilot pin 440 hold extension rod 42) again, its extension rod 42 can be in the perforation 411 of adjusting piece 41 expanding-contracting action, and can do self turn adjustment direction, and then, can be very easily with first proof-reading block, 420 involutory intramedullary pin 2 one ends of extension rod 42 ends, and wear the second far-end screw 23 of the guide hole 4200 involutory intramedullary pins 2 of second proof-reading block 420 with locating rod A, row is adjusted the positioning component 44 that assembles on piece 41 and the registration arm 40 packing that spins again, form extension rod 42 strong fixs, the positioning component 44 that is spun on the locating hole 432 with first proof-reading block 43 unscrews (recess 4401 disengagings of pilot pin 440 hold extension rod 42) again, its second proof-reading block 43 can be moved and the turn direction on extension rod 42, and then, can wear the second far-end screw 24 of the guide hole 432 involutory intramedullary pins 2 of second proof-reading block 43 again with locating rod A, positioning component 44 on row second proof-reading block 43 packing that spins again makes second proof-reading block, 43 strong fixs on extension rod 42; So, utilize " two one straight lines " principle to aim at the 23 back lockings of the first far-end screw in advance, aim at via another second proof-reading block 43 that can on extension 43, slide again, the second far-end screw 24, break away from tradition three one straight lines or an interplanar constraint, and then, intramedullary pin 2 and outside fix bar A can still can keep a suitable exact position after dismounting, implant in the bone marrow at intramedullary pin 2, this combination member 3 and outer regulate member 4 and finish in advance with intramedullary pin 2 set up check and correction and dismantled and assembledly combine again, and by obtaining first of appropriateness adjustment, two proof-

reading block

420,43

guide hole

4200,430 and the guide hole 305 of connecting support 30 fill a less knot hole guide pin bushing B respectively, pass guide pin bushing B with drill point C and drill first, the second far-

end screw

23,24 with proximal portion screw holes 22 bones two ends, at drill point (before extracting out as yet, can borrow a guide bar to stretch in the endoporus of intramedullary pin 2, metallic sound when borrowing guide bar to touch drill point B, whether and it is correct to inspect bore position, after the affirmation can bore the hole in lock a staple.

Advantage of the present utility model:

One, simplifies the joint and adjust quantity, make the integrated stand framework more firm, rapid.

The order of two, adjust aiming at is for after " two one straight lines " principle exercises earlier first proof-reading block and aim at a hole

Locking, again through another slidably second proof-reading block aim at another hole, break away from the tradition 3 always

Line or interplanar constraint.

Three, Movable joint control structure is very simplified, and operates very simple and easy.

Four, can do trickleer fine setting, to promote the accuracy of check and correction.

Claims

1, a kind of bone marrow internal fixation nail far-end screw sight, by an intramedullary pin, one combination member and an outer member of regulating are formed, wherein combination member is provided with two ends in the same way, and be connected with intramedullary pin and the outer member of regulating respectively, it is characterized in that: regulating member outward is by registration arm, adjust piece, extension rod, second proof-reading block and positioning component are formed, wherein registration arm one end provides axis hole and locating hole, this axis hole and locating hole vertical and eccentric setting mutually, this adjustment piece is arranged on the axis hole of registration arm, the axis hole of its corresponding registration arm prolongs the protruding axostylus axostyle that has, perforation and locating hole have been provided at sidewall, this perforation and locating hole vertical and eccentric setting mutually; Extension rod is located on the adjustment piece and the one end is provided with first proof-reading block; Second proof-reading block is located on the extension rod, and this second proof-reading block has provided vertical with locating hole and the eccentric setting of perforation and locating hole and this perforation again; Positioning component is arranged on registration arm and adjusts on the locating hole of the piece and second proof-reading block, and this positioning component is made up of pilot pin and nut, and wherein the axis hole of the involutory registration arm of pilot pin sidewall all is provided with recess with the perforation of the adjustment piece and second proof-reading block.