CN110840539B - Pelvic fracture external fixator - Google Patents

Abstract

Translated fromChinese

本发明公开了一种盆骨骨折外固定架，包括：螺杆；两套筒，其分别滑动套装在螺杆上，每个套筒两端均通过与螺杆匹配的螺母固定，每个套筒外壁固接有与螺杆垂直的伸缩杆，且螺杆与两伸缩杆共面，伸缩杆末端连接有旋转块，旋转块在螺杆及两伸缩杆所在平面内绕伸缩杆末端的法线转动及固定；四长方杆，每个旋转块远离伸缩杆的一侧面可固定的滑动连接有两长方杆，长方杆内设有贯穿的穿孔，穿孔一外侧壁贯穿设有固定孔，固定孔内连接有螺栓，以使骨针能够固定在所述骨针孔内。本发明在用于不同患者时，不需要额外增长螺母的螺合部位，并且可用于同时固定盆骨一侧两根骨针，同一种规格的固定支架适用范围广，操作方便。

The invention discloses an external fixator for pelvic fractures, comprising: a screw rod; two sleeves, which are respectively slidably sleeved on the screw rod, the two ends of each sleeve are fixed by nuts matching with the screw rod, and the outer wall of each sleeve is fixed A telescopic rod perpendicular to the screw rod is connected, and the screw rod is coplanar with the two telescopic rods, the end of the telescopic rod is connected with a rotating block, and the rotating block is rotated and fixed around the normal line of the end of the telescopic rod in the plane where the screw rod and the two telescopic rods are located; Square rod, one side of each rotating block away from the telescopic rod can be slidably connected with two rectangular rods, the rectangular rod is provided with a through hole, an outer side wall of the perforation is provided with a fixing hole, and the fixing hole is connected with a bolt , so that the bone pin can be fixed in the bone pin hole. When the present invention is used for different patients, it does not need to increase the screwing part of the nut, and can be used to fix two bone pins on one side of the pelvis at the same time. The fixing bracket of the same specification has a wide application range and is easy to operate.

Description

External fixing frame for pelvic fracture

Technical Field

The invention relates to the technical field of orthopedic medical instruments. More particularly, the present invention relates to an external fixator for pelvic fracture.

Background

When the pelvis is fractured, for example, when the fracture gap of the pelvis is too large, manual reduction is difficult and not fine enough, and the pelvis fracture external fixing frame can be used for fixing.

The current pelvis external fixation support that can multi-angle modulation and same multi-purpose freedom of specification is adjusted, and it includes that 3 at least adjustable length adjust pole, two lockable universal joints, two lockable universal balls, two extension rods and two spicules, and wherein, every is adjusted the pole including being equipped with internal screw-threaded sleeve and threaded rod, sleeve and threaded rod threaded connection. The pole is divided into length adjustment pole and both sides regulation pole, connect into a rectangle that only has the trilateral between length adjustment pole and the both sides regulation pole, is connected through the lockable universal joint between length adjustment pole and the both sides regulation pole, and the one end that length adjustment pole was kept away from to the both sides regulation pole is connected with the extension rod through the lockable universal ball respectively, and every extension rod passes through a fixed spicule of clamp splice, wherein according to patient's needs, the quantity of pole is adjusted to multiplicable length adjustment pole and both sides. During the use, loosen universal joint and universal bulb earlier, fix after pelvic bone fracture department when spicule one end, the other end passes through the clamp splice to be fixed on the extension rod, according to the length of adjustable rod, rotate adjusting sleeve, so that the adjusting screw of both sides stretches out or contracts, thereby make the adjustable rod extension or shorten, when adjusting to required length, the stall adjusts sleeve, later according to required opening size, adjust the orientation and the locking of universal joint and universal bulb structure, to this end, the regulation finishes, the length adjustment pole can exert required tension to the spicule.

Since the adjustment rods all have the shortest length, the increase in the length of the adjustment rods is not highly adaptable to patients with minor case differences; in order to be suitable for different patients, the number of the adjusting rods needs to be increased or reduced manually, when the number of the adjusting rods is large, the adjusting rods need to be adjusted one by one when the device is installed, and the operation is complex.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.

The invention also aims to provide an external fixing frame for pelvic fracture, which has wide application range and simple and convenient operation in the same specification.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an external fixator for pelvic fracture, including:

a screw;

the two sleeves are respectively sleeved on the screw rod in a sliding mode, two ends of each sleeve are fixed through nuts matched with the screw rod, an expansion link perpendicular to the screw rod is fixedly connected to the outer wall of each sleeve, the screw rod and the two expansion links are coplanar, the tail end of each expansion link is connected with a rotating block, and the rotating block rotates and is fixed around the normal line of the tail end of each expansion link in the plane where the screw rod and the two expansion links are located;

four rectangular poles, every rotatory piece is kept away from the sliding connection that a side of telescopic link can be fixed has two rectangular poles, be equipped with the perforation that runs through in the rectangular pole, perforation perpendicular screw rod and two telescopic link place planes, perforation diameter and spicule diameter looks adaptation, a perforation lateral wall runs through and is equipped with the fixed orifices, be connected with the bolt in the fixed orifices, so that the spicule can be fixed the spicule is downthehole.

Preferably, the telescopic rod comprises:

one end of the connecting rod is vertically and fixedly connected with the outer side wall of the sleeve;

the end face of one end of the second sleeve is axially inwards recessed to form a cavity, and the other end of the connecting rod is slidably arranged in the cavity;

the fixing mechanism comprises a first barrel and a second barrel which are slidably sleeved with the connecting rod, wherein the first barrel comprises a threaded barrel with one end fixedly connected with one end of the second barrel and the periphery provided with threads, and a claw ring fixedly connected with the other end of the threaded barrel, the claw ring is in a round platform shape formed by a plurality of elastic claw sheets arranged at intervals along the circumferential direction, the inner diameter of one end of the threaded barrel is slightly smaller than the inner diameter of the connecting rod under a natural state, the second barrel comprises a screwing part sleeved with the threaded barrel and an extrusion part arranged at one end of the second barrel, and when the screwing part is screwed with the threaded barrel, the extrusion part can be gradually pushed, pulled and inclined and can be correspondingly pressed on the claw ring.

Preferably, a circle of flange is arranged on the inner side wall of one end, close to the sleeve, of the extrusion part, and the inner diameter of the flange is equal to the diameter of the connecting rod.

Preferably, a circle of abutting edge is arranged on the outer side wall of one end, connected with the second sleeve, of the connecting rod, a circle of second flange is arranged on the inner side wall of one end, sleeved with the connecting rod, of the second sleeve, and the outer diameter of the abutting edge is larger than the inner diameter of the second flange.

Preferably, the rotating block is a square block, and one side surface of the rotating block, which is far away from the telescopic rod, is parallel to the rectangular rod;

the opposite side surfaces of the rotating block, the screw rod and the two telescopic rods, which are parallel to the plane, are provided with a long-strip-shaped sliding hole and a second fixing hole in a penetrating manner, the sliding hole and the second fixing hole are parallel to one side surface of the rotating block, which is far away from the telescopic rods, the distance between the second fixing hole and the rectangular rods is smaller than the distance between the sliding hole and the rectangular rods, a sliding rod parallel to the rectangular rods is arranged in the sliding hole, two ends of the sliding rod are fixedly connected with second connecting rods respectively, and the two second connecting rods are fixedly connected with the end parts of the rectangular rods on the same side;

and a screw hole penetrates through the corresponding position of each second connecting rod and the second fixing hole, the diameter of each screw hole is the same as the height of the second fixing hole, and a fixing bolt is screwed in the second fixing hole and the screw hole so that the second connecting rod can be fixed on the rotating block.

Preferably, the tail end of each telescopic rod is provided with an ear seat, the ear seat is provided with a central hole perpendicular to the surface where the screw rod and the two telescopic rods are located in a penetrating manner, and an internal thread is arranged in the central hole;

the rotating block is fixedly connected with an inserting plate, the thickness of the inserting plate is matched with the thickness of a gap in the middle of the lug seat, an inserting hole opposite to the central hole is formed in the inserting plate, and the diameter of the inserting hole is the same as that of the central hole;

and the thread of the second bolt is matched with the internal thread of the central hole, and after the inserting plate is inserted into the lug seat, the second bolt is screwed with the central hole to enable the telescopic rod to be fixed with the rotating block so as to realize the rotation and fixation of the rotating block around the normal line at the tail end of the telescopic rod.

The invention at least comprises the following beneficial effects:

firstly, the two sleeves are pushed to slide on the screw rods by adjusting the nuts at the two ends of the two sleeves so as to drive the telescopic rods fixedly connected to the sleeves to move, the telescopic rods drive the rotating blocks connected with the tail ends of the telescopic rods to move, and the moving blocks move to drive the spicules fixed on the rotating blocks to move, so that the aim of adjusting the distance between the spicules is fulfilled. The distance between the spicules is adjusted through the position of adjusting nut on the screw rod, and the applied force is more even to because all have the screw thread on the screw rod lateral wall, when being used for different patients, need not additionally increase the spiral shell of nut and close the position, the fixed bolster application scope of same kind of specification is wide promptly, convenient operation.

Secondly, one side of the pelvis needs to be fixed with one or two spicules with different lengths according to the condition of the patient, and the distance between the two spicules is different according to the different patients. According to the invention, each rotating block is slidably connected with two rectangular rods for fixing spicules, the distance between the two rectangular rods is adjustable, the rotating block can be used for fixing two spicules on one side of a pelvis simultaneously, and the rotating block is wide in application range.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic structural view of an external fixator for pelvic fracture according to one embodiment of the present invention;

fig. 2 is a schematic structural view of the telescopic rod according to one embodiment of the present invention;

FIG. 3 is a schematic view of a second cylinder mechanism according to one embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a connecting rod according to one embodiment of the present invention;

FIG. 5 is a schematic view of a second sleeve portion according to one embodiment of the present invention;

FIG. 6 is a sectional view of the slide bar connected to a rectangular bar according to one embodiment of the present invention;

fig. 7 is a schematic view of the connection between the ear seat and the insert plate according to one embodiment of the present invention.

Reference numerals: the screw rod 1, thesleeve 2, the nut 3, thetelescopic rod 4, the rotating block 5, the rectangular rod 6, the through hole 7, thefixing hole 8, the bolt 9, the connectingrod 10, thesecond sleeve 11, thecavity 12, thefixing mechanism 13, thefirst cylinder 14, thesecond cylinder 15, the threadedcylinder 16, theclaw ring 17, thescrewing part 18, theextruding part 19, theflange 20, theabutting edge 21, thesecond flange 22, thesliding hole 23, the second fixing hole 24, thesliding rod 25, the second connectingrod 26, thescrew hole 27, thefixing bolt 28, theear seat 29, thecenter hole 30, the inserting plate 31, theinserting hole 32 and thesecond bolt 33.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 to 7, the present invention provides an external fixator for pelvic fracture, comprising:

a screw 1;

the twosleeves 2 are respectively sleeved on the screw rods 1 in a sliding mode, two ends of eachsleeve 2 are fixed through nuts 3 matched with the screw rods 1, anexpansion rod 4 perpendicular to the screw rods 1 is fixedly connected to the outer wall of eachsleeve 2, the screw rods 1 and the twoexpansion rods 4 are coplanar, the tail ends of theexpansion rods 4 are connected with rotating blocks 5, and the rotating blocks 5 rotate and are fixed around the normal lines of the tail ends of theexpansion rods 4 in the plane where the screw rods 1 and the twoexpansion rods 4 are located;

four rectangular poles 6, every rotatory piece 5 is kept away from the side fixable's oftelescopic link 4 has two rectangular poles 6, be equipped with the perforation 7 that runs through in the rectangular pole 6, perforation 7 perpendicular screw rod 1 and twotelescopic link 4 place planes, perforation 7 diameter and spicule diameter looks adaptation, 7 lateral walls of perforation run through and are equipped withfixed orifices 8, 8 in-connection of fixed orifices have bolt 9, so that the spicule can be fixed in the spicule is downthehole.

In the above technical solution, as shown in fig. 1, twosleeves 2 are slidably sleeved on a screw rod 1, two ends of eachsleeve 2 are fixed by nuts 3 screwed with the screw rod 1, anexpansion link 4 perpendicular to the screw rod 1 is fixedly connected to an outer wall of eachsleeve 2, and the screw rod 1 and the twoexpansion links 4 are in the same plane, wherein the distance between the screw rod 1 and the spicule can be adjusted by adjusting the length of theexpansion link 4, so that the stent is suitable for different patients. Thetelescopic link 4 is kept away fromsleeve 2's one end and is connected with rotatory piece 5, wherein, when the angle of adjustmenttelescopic link 4 and rotatory piece 5, rotatory piece 5 uses perpendicular to screw rod 1 and twotelescopic links 4 place planar center pin as the center, around the terminal rotation oftelescopic link 4, after adjusting the angle betweentelescopic link 4 and the rotatory piece 5, rotatory piece 5 is fixed attelescopic link 4 terminally. One side thattelescopic link 4 was kept away from to every rotatory piece 5 all is equipped with two rectangular poles 6, and the distance between two rectangular poles 6 is adjustable for two spicules distances of pelvic bone one side suit, behind the fixed spicule, rectangular pole 6 is fixed on rotatory piece 5. Each rectangular rod 6 is internally provided with a through hole 7 penetrating through two ends of the rectangular rod, wherein the diameter of the through hole 7 is larger than or equal to the diameter of a bone needle, so that the bone needle can penetrate through the through hole 7, and the through hole 7 is arranged perpendicular to the plane where the screw rod 1 and the twotelescopic rods 4 are located. The outer side wall of each perforation 7 is provided with a throughfixing hole 8, a bolt 9 is connected in thefixing hole 8, and when the bone needle is in the perforation 7, the bolt 9 can be screwed for fixing the bone needle.

During the use process, firstly, the spicules are inserted into the pelvis of a patient, the distance between the two rectangular rods 6 on the rotating block 5 is adjusted according to the distance between the two spicules at the side edge of the pelvis, after the spicule penetrates into the through hole 7, the spicule is fixed by using the bolt 9, the rectangular rod 6 is fixed on the rotating block 5, wherein, the bracket is not only suitable for the condition that each side of the pelvis is fixed with two spicules, when only one spicule is arranged on each side, or can be used, after the spicules at the two sides of the pelvis are fixed in the corresponding rectangular rods 6 by the step, the angle between thetelescopic rod 4 and the rotating block 5 is adjusted, so that the twotelescopic rods 4 are parallel to each other, and the twosleeves 2 at the end parts of the twotelescopic rods 4 are on the same straight line, then, the screw 1 is inserted into the twosleeves 2 and thesleeves 2 are fixed by nuts 3, wherein thesleeves 2 are fixed by the nuts 3 screwed on the screw 1 at both ends thereof. When the distance between spicules on two sides of a pelvis is required to be reduced to treat the pelvis, the position of thesleeve 2 on one side of the screw rod 1 is adjusted firstly, the nut 3, close to the other end of thesleeve 2, of thesleeve 2 is moved to a distance far away from thesleeve 2, then the nut 3, far away from thesleeve 2, of thesleeve 2 is moved to the required position after thesleeve 2 is driven to move, the nut 3 is moved to the end portion of thesleeve 2 and used for fixing thesleeve 2, and then thesleeve 2 on the other side is adjusted by the same step. By adopting the technical scheme, the twosleeves 2 are pushed to slide on the screw rod 1 by adjusting the nuts 3 at the two ends of the twosleeves 2 so as to drive thetelescopic rod 4 fixedly connected on thesleeves 2 to move, thetelescopic rod 4 drives the rotating block 5 connected with the tail end of the telescopic rod to move, and the moving block moves to drive the spicules fixed on the rotating block 5 to move, so that the aim of adjusting the distance between the spicules is fulfilled. Adjust the distance between the pelvis both sides spicule through the position of adjusting nut 3 on screw rod 1, it is more even to exert force to because all have the screw thread on the 1 lateral wall of screw rod, when being used for different patients, need not additionally increase the spiral shell of nut 3 and close the position, the fixed bolster application scope of same kind of specification is wide promptly, convenient operation. According to the disease condition of a patient, one or two spicules are required to be fixed on one side of the pelvis sometimes, and the distance between the two spicules is different due to different patients.

In another technical solution, thetelescopic rod 4 comprises:

one end of the connectingrod 10 is vertically and fixedly connected with the outer side wall of thesleeve 2;

acavity 12 is formed in one end face of thesecond sleeve 11 and is recessed axially, and the other end of the connectingrod 10 is arranged in thecavity 12 in a sliding mode;

thefixing mechanism 13 includes afirst cylinder 14 and asecond cylinder 15 slidably fitted with the connectingrod 10, wherein thefirst cylinder 14 includes a threadedcylinder 16 having one end fixedly connected to one end of thesecond sleeve 11 and a thread on the outer periphery thereof, and aclaw ring 17 fixedly connected to the other end of the threadedcylinder 16, theclaw ring 17 is in a circular truncated cone shape formed by a plurality of elastic claw pieces circumferentially arranged at intervals, an inner diameter of one end of theclaw ring 17 away from the threadedcylinder 16 is slightly smaller than an inner diameter of the connectingrod 10 in a natural state, thesecond cylinder 15 includes ascrewing portion 18 fitted with the threadedcylinder 16, and apressing portion 19 provided at one end of thesecond cylinder 15 close to thesleeve 2, and when thescrewing portion 18 is screwed with the threadedcylinder 16, thepressing portion 19 can be gradually tilted inward and can be correspondingly pressed against theclaw ring 17.

In the above technical solution, eachtelescopic rod 4 comprises a connectingrod 10, asecond sleeve 11 and afixing mechanism 13, one end of the connectingrod 10 is arranged in acavity 12 of thesecond sleeve 11, and the connectingrod 10 can slide in thecavity 12. The fixingmechanism 13 is mainly used for fixing thesecond sleeve 11 and the connectingrod 10, and includes afirst cylinder 14 and asecond cylinder 15 which are slidably sleeved with the connectingrod 10, wherein thesecond sleeve 11, the connectingrod 10, thefirst cylinder 14 and thesecond cylinder 15 are coaxially arranged, so that the device is convenient to install and operate. Thefirst barrel 14 comprises a threadedbarrel 16 and aclaw ring 17, one end of the threadedbarrel 16 is fixedly connected with the end part of thesecond barrel 11, the other end of the threaded barrel is fixedly connected with theclaw ring 17, wherein theclaw ring 17 is in a circular truncated cone shape formed by a plurality of elastic claw sheets arranged at intervals along the circumferential direction, the inner diameter of one end, fixedly connected with the threadedbarrel 16, of theclaw ring 17 is the largest in a natural state, the inner diameter of one end, far away from the threadedbarrel 16, of theclaw ring 17 is slightly smaller than the inner diameter of the connectingrod 10, installation and operation of the device are facilitated, preferably, the largest inner diameter of theclaw ring 17 is equal to the inner diameter of the threadedbarrel 16. Thesecond cylinder 15 includes a threadedportion 18 capable of engaging with the threadedbarrel 16, and apressing portion 19 disposed at one end of thesecond cylinder 15 close to thesleeve 2, wherein thepressing portion 19 is preferably a circular truncated cone-shaped structure adapted to theclaw ring 17, and the minimum inner diameter of the end portion thereof is smaller than the outer diameter of theclaw ring 17 in a state of being sleeved on the outer side of the connectingrod 10, when thesecond sleeve 11 and the connectingrod 10 need to be fixed, the threadedportion 18 is used to be in threaded connection with the threadedbarrel 16, and thepressing portion 19 pressurizes theclaw ring 17, so that theclaw ring 17 is tightly attached to the connectingrod 10 to increase the friction between theclaw ring 17 and the connectingrod 10, thereby fixing thesecond sleeve 11 and the connectingrod 10. By adopting the scheme, the distance between the screw rod 1 and the spicule can be adjusted, so that the bracket with the same specification is suitable for different patients.

In another technical scheme, a circle offlange 20 is arranged on the inner side wall of one end of theextrusion part 19 close to thesleeve 2, the inner diameter of theflange 20 is equal to the diameter of the connectingrod 10, and when thesecond cylinder 15 is screwed with thefirst cylinder 14, theclaw ring 17 is always inside thesecond cylinder 15, and theclaw ring 17 cannot extend out of the end of theextrusion part 19 due to factors such as excessive force and the like.

In another technical scheme, a circle of abuttingedge 21 is arranged on the outer side wall of one end, connected with thesecond sleeve 11, of the connectingrod 10, a circle ofsecond flange 22 is arranged on the inner side wall of one end, sleeved with the connectingrod 10, of thesecond sleeve 11, and the outer diameter of the abuttingedge 21 is larger than the inner diameter of thesecond flange 22, so that thesecond sleeve 11 can be prevented from being separated from the connectingrod 10.

In another technical scheme, the rotating block 5 is a square block, and one side surface of the rotating block 5 away from thetelescopic rod 4 is parallel to the rectangular rod 6;

the opposite side surfaces of the rotating block 5, the screw rod 1 and the twotelescopic rods 4, which are parallel to each other, are provided with a long strip-shaped slidinghole 23 and a second fixing hole 24 in a penetrating manner, the slidinghole 23 and the second fixing hole 24 are parallel to one side surface of the rotating block 5, which is far away from thetelescopic rods 4, the distance between the second fixing hole 24 and the rectangular rod 6 is smaller than the distance between the slidinghole 23 and the rectangular rod 6, a slidingrod 25 parallel to the rectangular rod 6 is arranged in the slidinghole 23, two ends of the slidingrod 25 are fixedly connected with second connectingrods 26 respectively, and meanwhile, the two second connectingrods 26 are fixedly connected with the end parts of the rectangular rod 6 on the same side;

ascrew hole 27 is formed through each second connectingrod 26 at a position corresponding to the second fixing hole 24, the diameter of thescrew hole 27 is the same as the height of the second fixing hole 24, and a fixingbolt 28 is screwed in thescrew hole 27 and the second fixing hole 24, so that the second connectingrod 26 can be fixed on the rotating block 5.

In the above technical solution, the opposite side surfaces of the rotating block 5, the screw rod 1 and the twotelescopic rods 4, which are parallel to each other, are provided with the long slidinghole 23 and the second fixing hole 24 in a penetrating manner, the slidinghole 23 is internally provided with the slidingrod 25 parallel to the rectangular rod 6, the lengths of the rectangular rod 6 and the slidingrod 25 are equal to the distance between the two ends of the slidinghole 23, the two ends of the slidingrod 25 are respectively and fixedly connected with the second connectingrod 26, and the two second connectingrods 26 are fixedly connected with the end portions of the rectangular rod 6 on the same side, so that the rectangular rod 6 can slide on the rotating block 5, and the distance between the two rectangular rods 6 can be adjusted. Each second connectingrod 26 is provided with ascrew hole 27 through the corresponding position of the second fixing hole 24, the diameter of thescrew hole 27 is the same as the height of the second fixing hole 24, the second fixing hole 24 is screwed with thescrew hole 27 to form a fixingbolt 28, and after the distance between the two rectangular rods 6 is adjusted, the rectangular rods 6 are fixed on the rotating block 5 through the fixingbolts 28.

In another technical scheme, anear seat 29 is arranged at the tail end of eachtelescopic rod 4, acentral hole 30 perpendicular to the surface of the screw rod 1 and the twotelescopic rods 4 is arranged in eachear seat 29 in a penetrating manner, and internal threads are arranged in eachcentral hole 30; an inserting plate 31 is fixedly connected to the rotating block 5, the thickness of the inserting plate 31 is matched with the thickness of a gap in the middle of thelug seat 29, an insertinghole 32 opposite to thecentral hole 30 is formed in the inserting plate 31, and the diameter of the insertinghole 32 is the same as that of thecentral hole 30; and the thread of thesecond bolt 33 is matched with the internal thread of thecentral hole 30, and after the inserting plate 31 is inserted into theear seat 29, thesecond bolt 33 is screwed with thecentral hole 30, so that thetelescopic rod 4 and the rotating block 5 can be fixed, and the rotating block 5 can rotate and be fixed around the normal line of the tail end of thetelescopic rod 4. In this configuration, when the angle between the rotary block 5 and theextendable rod 4 is adjusted, thesecond bolt 33 is first loosened to rotate the rotary block 5 around the end of theextendable rod 4 about the central axis perpendicular to the plane of the screw 1 and the twoextendable rods 4, and the angle between theextendable rod 4 and the rotary block 5 is adjusted, and then thesecond bolt 33 is screwed into thecentral hole 30 to fix the rotary block 5 and theextendable rod 4.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. The application, modification and variation of the external fixator for pelvic fracture of the present invention will be apparent to those skilled in the art.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (3)

Translated fromChinese

1.盆骨骨折外固定架，其特征在于，包括：1. external fixator for pelvic fracture, characterized in that, comprising:螺杆；screw;两套筒，其分别滑动套装在所述螺杆上，每个套筒两端均通过与所述螺杆匹配的螺母固定，每个套筒外壁固接有与所述螺杆垂直的伸缩杆，且所述螺杆与两伸缩杆共面，所述伸缩杆末端连接有旋转块，所述旋转块在螺杆及两伸缩杆所在平面内绕伸缩杆末端的法线转动及固定；Two sleeves, which are respectively slidably sleeved on the screw rod, both ends of each sleeve are fixed by a nut matched with the screw rod, the outer wall of each sleeve is fixed with a telescopic rod perpendicular to the screw rod, and the The screw rod is coplanar with the two telescopic rods, the end of the telescopic rod is connected with a rotating block, and the rotating block is rotated and fixed around the normal line of the end of the telescopic rod in the plane where the screw rod and the two telescopic rods are located;四长方杆，每个旋转块远离所述伸缩杆的一侧面可固定的滑动连接有两长方杆，所述长方杆内设有贯穿的穿孔，所述穿孔垂直螺杆及两伸缩杆所在平面，所述穿孔直径与骨针直径相适配，所述穿孔一外侧壁贯穿设有固定孔，所述固定孔内连接有螺栓，以使所述骨针能够固定在所述骨针孔内；Four rectangular rods, one side of each rotating block away from the telescopic rod is slidably connected with two rectangular rods, the rectangular rod is provided with a through hole, the perforated vertical screw and the two telescopic rods are located Plane, the diameter of the perforation matches the diameter of the bone spicules, the outer side wall of the perforation is provided with a fixing hole, and the fixing hole is connected with a bolt, so that the bone needle can be fixed in the bone needle hole ;其中，所述旋转块为方块，所述旋转块远离所述伸缩杆的一侧面与所述长方杆平行；所述旋转块与所述螺杆及两伸缩杆所在平面平行的相对侧面上贯穿设有长条状的滑孔与第二固定孔，所述滑孔与所述第二固定孔平行于所述旋转块远离所述伸缩杆的一侧面，所述第二固定孔与所述长方杆之间的距离小于所述滑孔与所述长方杆之间的距离，所述滑孔内设有平行于所述长方杆的滑杆，所述滑杆两端分别固接有第二连接杆，同时两第二连接杆与同侧所述长方杆端部固接；每个第二连接杆与所述第二固定孔对应处均贯穿设有螺孔，所述螺孔直径与所述第二固定孔高度相同，所述第二固定孔与所述螺孔螺合有固定螺栓，以使所述第二连接杆能够固定在所述旋转块上；Wherein, the rotating block is a square, and one side of the rotating block away from the telescopic rod is parallel to the rectangular rod; the rotating block and the opposite side surface parallel to the plane where the screw rod and the two telescopic rods are located pass through. There are elongated sliding holes and second fixing holes, the sliding holes and the second fixing holes are parallel to the side of the rotating block away from the telescopic rod, and the second fixing holes and the rectangular The distance between the rods is smaller than the distance between the sliding hole and the rectangular rod, the sliding hole is provided with a sliding rod parallel to the rectangular rod, and the two ends of the sliding rod are respectively fixed with a second rod. Two connecting rods, and at the same time, the two second connecting rods are fixedly connected with the end of the rectangular rod on the same side; each second connecting rod and the second fixing hole are provided with screw holes corresponding to each other, and the screw holes have a diameter of The height of the second fixing hole is the same as that of the second fixing hole, and a fixing bolt is screwed into the second fixing hole and the screw hole, so that the second connecting rod can be fixed on the rotating block;所述伸缩杆包括：The telescopic rod includes:连接杆，其一端与所述套筒外侧壁垂直固接；a connecting rod, one end of which is vertically fixed to the outer side wall of the sleeve;第二套筒，其一端端面轴向向内凹陷设有空腔，所述连接杆另一端滑动设于所述空腔内；the second sleeve, one end face of which is recessed axially inward with a cavity, and the other end of the connecting rod is slidably arranged in the cavity;固定机构，其包括与所述连接杆滑动套装的第一筒体和第二筒体，其中，所述第一筒体包括一端与所述第二套筒一端固接且外周具有螺纹的螺纹筒、与所述螺纹筒另一端固接的爪环，所述爪环为多个沿周向间隔设置的弹性爪片构成的圆台状，自然状态下所述爪环远离所述螺纹筒的一端内径略小于所述连接杆内径，所述第二筒体包括与所述螺纹筒套合的螺合部、设于所述第二筒体靠近所述套筒一端的挤压部，当所述螺合部与所述螺纹筒螺合时所述挤压部可逐渐向内推拔倾斜且可对应紧迫所述爪环；A fixing mechanism, which includes a first cylinder body and a second cylinder body slidably sleeved with the connecting rod, wherein the first cylinder body includes a threaded cylinder whose one end is fixedly connected to one end of the second sleeve and has threads on the outer periphery , a claw ring fixedly connected with the other end of the threaded barrel, the claw ring is a truncated cone formed by a plurality of elastic claw pieces arranged at intervals along the circumferential direction, in a natural state, the claw ring is away from the inner diameter of one end of the threaded barrel Slightly smaller than the inner diameter of the connecting rod, the second cylinder includes a threaded portion that is sleeved with the threaded cylinder, and a pressing portion located at one end of the second cylinder close to the sleeve. When the joint part is screwed with the threaded barrel, the pressing part can be gradually pushed inward and inclined, and can correspondingly press the claw ring;所述伸缩杆末端设有耳座，所述耳座贯穿设有垂直于所述螺杆与两伸缩杆所在面的中心孔，所述中心孔内设有内螺纹；The end of the telescopic rod is provided with an ear seat, the ear seat is provided with a central hole perpendicular to the surface where the screw rod and the two telescopic rods are located, and an inner thread is arranged in the central hole;所述旋转块固接有插板，所述插板的厚度与所述耳座中间的间隙厚度相匹配，所述插板上设有与所述中心孔相对的插孔，所述插孔的直径与所述中心孔直径相同；The rotating block is fixed with a plug board, the thickness of the plug board matches the thickness of the gap in the middle of the ear seat, the plug board is provided with a socket opposite to the center hole, and the socket is The diameter is the same as the diameter of the central hole;第二螺栓，其螺纹与所述中心孔内螺纹相适配，所述插板插入到所述耳座后，所述第二螺栓与所述中心孔螺合能够使所述伸缩杆与所述旋转块固定，以实现所述旋转块绕伸缩杆末端的法线转动及固定。A second bolt, the thread of which is matched with the inner thread of the central hole, after the insert plate is inserted into the ear seat, the second bolt is screwed with the central hole so that the telescopic rod can be connected to the The rotating block is fixed, so as to realize the rotation and fixing of the rotating block around the normal line of the end of the telescopic rod.2.如权利要求1所述的盆骨骨折外固定架，其特征在于，所述挤压部靠近所述套筒的一端内侧壁上设有一圈凸缘，所述凸缘内径等于所述连接杆直径。2 . The external fixator for pelvic fractures according to claim 1 , wherein a ring of flanges is provided on the inner side wall of one end of the pressing portion close to the sleeve, and the inner diameter of the flange is equal to the connection. 3 . rod diameter.3.如权利要求1所述的盆骨骨折外固定架，其特征在于，所述连接杆与所述第二套筒连接的一端的外侧壁上设有一圈抵缘，所述第二套筒与所述连接杆套接的一端的内侧壁上设有一圈第二凸缘，所述抵缘外径大于所述第二凸缘内径。3 . The external fixator for pelvic fractures according to claim 1 , wherein an outer side wall of one end of the connecting rod connected to the second sleeve is provided with a ring of abutting edges, and the second sleeve A ring of second flanges is arranged on the inner side wall of the end sleeved with the connecting rod, and the outer diameter of the abutting edge is larger than the inner diameter of the second flange.

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