CN110840539B - External fixing frame for pelvic fracture - Google Patents
External fixing frame for pelvic fracture Download PDFInfo
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- CN110840539B CN110840539B CN201911191017.9A CN201911191017A CN110840539B CN 110840539 B CN110840539 B CN 110840539B CN 201911191017 A CN201911191017 A CN 201911191017A CN 110840539 B CN110840539 B CN 110840539B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/66—Alignment, compression or distraction mechanisms
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Abstract
The invention discloses an external fixing frame for pelvic fracture, comprising: a screw; the two sleeves are respectively sleeved on the screw in a sliding mode, two ends of each sleeve are fixed through nuts matched with the screw, the outer wall of each sleeve is fixedly connected with a telescopic rod perpendicular to the screw, the screw is coplanar with the two telescopic rods, the tail end of each telescopic rod is connected with a rotating block, and the rotating block rotates and is fixed around the normal line of the tail end of each telescopic rod in the plane where the screw and the two telescopic rods are located; four rectangular poles, the side that the telescopic link was kept away from to every rotatory piece sliding connection that can fix has two rectangular poles, is equipped with the perforation that runs through in the rectangular pole, and a perforation lateral wall runs through and is equipped with the fixed orifices, is connected with the bolt in the fixed orifices to make the spicule fix it is downthehole. When the fixing support is used for different patients, the screwing part of the nut does not need to be additionally increased, the fixing support can be used for simultaneously fixing two spicules on one side of the pelvis, and the fixing support with the same specification has wide application range and convenient operation.
Description
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, the sleeve 2, the nut 3, the telescopic rod 4, the rotating block 5, the rectangular rod 6, the through hole 7, the fixing hole 8, the bolt 9, the connecting rod 10, the second sleeve 11, the cavity 12, the fixing mechanism 13, the first cylinder 14, the second cylinder 15, the threaded cylinder 16, the claw ring 17, the screwing part 18, the extruding part 19, the flange 20, the abutting edge 21, the second flange 22, the sliding hole 23, the second fixing hole 24, the sliding rod 25, the second connecting rod 26, the screw hole 27, the fixing bolt 28, the ear seat 29, the center hole 30, the inserting plate 31, the inserting hole 32 and the second 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 two sleeves 2 are respectively sleeved on the screw rods 1 in a sliding mode, two ends of each sleeve 2 are fixed through nuts 3 matched with the screw rods 1, an expansion rod 4 perpendicular to the screw rods 1 is fixedly connected to the outer wall of each sleeve 2, the screw rods 1 and the two expansion rods 4 are coplanar, the tail ends of the expansion 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 the expansion rods 4 in the plane where the screw rods 1 and the two expansion rods 4 are located;
four rectangular poles 6, every rotatory piece 5 is kept away from the side fixable's of telescopic 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 two telescopic link 4 place planes, perforation 7 diameter and spicule diameter looks adaptation, 7 lateral walls of perforation run through and are equipped with fixed 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, two sleeves 2 are slidably sleeved on a screw rod 1, two ends of each sleeve 2 are fixed by nuts 3 screwed with the screw rod 1, an expansion link 4 perpendicular to the screw rod 1 is fixedly connected to an outer wall of each sleeve 2, and the screw rod 1 and the two expansion 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 the expansion link 4, so that the stent is suitable for different patients. The telescopic link 4 is kept away from sleeve 2's one end and is connected with rotatory piece 5, wherein, when the angle of adjustment telescopic link 4 and rotatory piece 5, rotatory piece 5 uses perpendicular to screw rod 1 and two telescopic links 4 place planar center pin as the center, around the terminal rotation of telescopic link 4, after adjusting the angle between telescopic link 4 and the rotatory piece 5, rotatory piece 5 is fixed at telescopic link 4 terminally. One side that telescopic 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 two telescopic rods 4 are located. The outer side wall of each perforation 7 is provided with a through fixing hole 8, a bolt 9 is connected in the fixing 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 the telescopic rod 4 and the rotating block 5 is adjusted, so that the two telescopic rods 4 are parallel to each other, and the two sleeves 2 at the end parts of the two telescopic rods 4 are on the same straight line, then, the screw 1 is inserted into the two sleeves 2 and the sleeves 2 are fixed by nuts 3, wherein the sleeves 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 the sleeve 2 on one side of the screw rod 1 is adjusted firstly, the nut 3, close to the other end of the sleeve 2, of the sleeve 2 is moved to a distance far away from the sleeve 2, then the nut 3, far away from the sleeve 2, of the sleeve 2 is moved to the required position after the sleeve 2 is driven to move, the nut 3 is moved to the end portion of the sleeve 2 and used for fixing the sleeve 2, and then the sleeve 2 on the other side is adjusted by the same step. By adopting the technical scheme, the two sleeves 2 are pushed to slide on the screw rod 1 by adjusting the nuts 3 at the two ends of the two sleeves 2 so as to drive the telescopic rod 4 fixedly connected on the sleeves 2 to move, the telescopic 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, the telescopic rod 4 comprises:
one end of the connecting rod 10 is vertically and fixedly connected with the outer side wall of the sleeve 2;
a cavity 12 is formed in one end face of the second sleeve 11 and is recessed axially, and the other end of the connecting rod 10 is arranged in the cavity 12 in a sliding mode;
the fixing mechanism 13 includes a first cylinder 14 and a second cylinder 15 slidably fitted with the connecting rod 10, wherein the first cylinder 14 includes a threaded cylinder 16 having one end fixedly connected to one end of the second sleeve 11 and a thread on the outer periphery thereof, and a claw ring 17 fixedly connected to the other end of the threaded cylinder 16, the claw 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 the claw ring 17 away from the threaded cylinder 16 is slightly smaller than an inner diameter of the connecting rod 10 in a natural state, the second cylinder 15 includes a screwing portion 18 fitted with the threaded cylinder 16, and a pressing portion 19 provided at one end of the second cylinder 15 close to the sleeve 2, and when the screwing portion 18 is screwed with the threaded cylinder 16, the pressing portion 19 can be gradually tilted inward and can be correspondingly pressed against the claw ring 17.
In the above technical solution, each telescopic rod 4 comprises a connecting rod 10, a second sleeve 11 and a fixing mechanism 13, one end of the connecting rod 10 is arranged in a cavity 12 of the second sleeve 11, and the connecting rod 10 can slide in the cavity 12. The fixing mechanism 13 is mainly used for fixing the second sleeve 11 and the connecting rod 10, and includes a first cylinder 14 and a second cylinder 15 which are slidably sleeved with the connecting rod 10, wherein the second sleeve 11, the connecting rod 10, the first cylinder 14 and the second cylinder 15 are coaxially arranged, so that the device is convenient to install and operate. The first barrel 14 comprises a threaded barrel 16 and a claw ring 17, one end of the threaded barrel 16 is fixedly connected with the end part of the second barrel 11, the other end of the threaded barrel is fixedly connected with the claw ring 17, wherein the claw 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 threaded barrel 16, of the claw ring 17 is the largest in a natural state, the inner diameter of one end, far away from the threaded barrel 16, of the claw ring 17 is slightly smaller than the inner diameter of the connecting rod 10, installation and operation of the device are facilitated, preferably, the largest inner diameter of the claw ring 17 is equal to the inner diameter of the threaded barrel 16. The second cylinder 15 includes a threaded portion 18 capable of engaging with the threaded barrel 16, and a pressing portion 19 disposed at one end of the second cylinder 15 close to the sleeve 2, wherein the pressing portion 19 is preferably a circular truncated cone-shaped structure adapted to the claw ring 17, and the minimum inner diameter of the end portion thereof is smaller than the outer diameter of the claw ring 17 in a state of being sleeved on the outer side of the connecting rod 10, when the second sleeve 11 and the connecting rod 10 need to be fixed, the threaded portion 18 is used to be in threaded connection with the threaded barrel 16, and the pressing portion 19 pressurizes the claw ring 17, so that the claw ring 17 is tightly attached to the connecting rod 10 to increase the friction between the claw ring 17 and the connecting rod 10, thereby fixing the second sleeve 11 and the connecting rod 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 of flange 20 is arranged on the inner side wall of one end of the extrusion part 19 close to the sleeve 2, the inner diameter of the flange 20 is equal to the diameter of the connecting rod 10, and when the second cylinder 15 is screwed with the first cylinder 14, the claw ring 17 is always inside the second cylinder 15, and the claw ring 17 cannot extend out of the end of the extrusion part 19 due to factors such as excessive force and the like.
In another technical scheme, a circle of abutting edge 21 is arranged on the outer side wall of one end, connected with the second sleeve 11, of the connecting rod 10, a circle of second flange 22 is arranged on the inner side wall of one end, sleeved with the connecting rod 10, of the second sleeve 11, and the outer diameter of the abutting edge 21 is larger than the inner diameter of the second flange 22, so that the second sleeve 11 can be prevented from being separated from the connecting rod 10.
In another technical scheme, the rotating block 5 is a square block, and one side surface of the rotating block 5 away from the telescopic rod 4 is parallel to the rectangular rod 6;
the opposite side surfaces of the rotating block 5, the screw rod 1 and the two telescopic rods 4, which are parallel to each other, are provided with a long strip-shaped sliding hole 23 and a second fixing hole 24 in a penetrating manner, the sliding hole 23 and the second fixing hole 24 are parallel to one side surface of the rotating block 5, which is far away from the telescopic rods 4, the distance between the second fixing hole 24 and the rectangular rod 6 is smaller than the distance between the sliding hole 23 and the rectangular rod 6, a sliding rod 25 parallel to the rectangular rod 6 is arranged in the sliding hole 23, two ends of the sliding rod 25 are fixedly connected with second connecting rods 26 respectively, and meanwhile, the two second connecting rods 26 are fixedly connected with the end parts of the rectangular rod 6 on the same side;
a screw hole 27 is formed through each second connecting rod 26 at a position corresponding to the second fixing hole 24, the diameter of the screw hole 27 is the same as the height of the second fixing hole 24, and a fixing bolt 28 is screwed in the screw hole 27 and the second fixing hole 24, so that the second connecting rod 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 two telescopic rods 4, which are parallel to each other, are provided with the long sliding hole 23 and the second fixing hole 24 in a penetrating manner, the sliding hole 23 is internally provided with the sliding rod 25 parallel to the rectangular rod 6, the lengths of the rectangular rod 6 and the sliding rod 25 are equal to the distance between the two ends of the sliding hole 23, the two ends of the sliding rod 25 are respectively and fixedly connected with the second connecting rod 26, and the two second connecting rods 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 connecting rod 26 is provided with a screw hole 27 through the corresponding position of the second fixing hole 24, the diameter of the screw hole 27 is the same as the height of the second fixing hole 24, the second fixing hole 24 is screwed with the screw hole 27 to form a fixing bolt 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 fixing bolts 28.
In another technical scheme, an ear seat 29 is arranged at the tail end of each telescopic rod 4, a central hole 30 perpendicular to the surface of the screw rod 1 and the two telescopic rods 4 is arranged in each ear seat 29 in a penetrating manner, and internal threads are arranged in each central 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 the lug seat 29, an inserting hole 32 opposite to the central hole 30 is formed in the inserting plate 31, and the diameter of the inserting hole 32 is the same as that of the central hole 30; and the thread of the second bolt 33 is matched with the internal thread of the central hole 30, and after the inserting plate 31 is inserted into the ear seat 29, the second bolt 33 is screwed with the central hole 30, so that the telescopic 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 the telescopic rod 4. In this configuration, when the angle between the rotary block 5 and the extendable rod 4 is adjusted, the second bolt 33 is first loosened to rotate the rotary block 5 around the end of the extendable rod 4 about the central axis perpendicular to the plane of the screw 1 and the two extendable rods 4, and the angle between the extendable rod 4 and the rotary block 5 is adjusted, and then the second bolt 33 is screwed into the central hole 30 to fix the rotary block 5 and the extendable 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)
1. Pelvis fracture external fixation frame, its characterized in that includes:
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;
the side face, away from the telescopic rod, of each rotating block is fixedly and slidably connected with the two rectangular rods, penetrating through holes are formed in the rectangular rods, the penetrating holes are perpendicular to the plane where the screw rods and the two telescopic rods are located, the diameter of each penetrating hole is matched with the diameter of the bone pin, a fixing hole penetrates through one outer side wall of each penetrating hole, and a bolt is connected in each fixing hole so that the bone pin can be fixed in the bone pin hole;
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; a screw hole penetrates through the position, corresponding to the second fixing hole, of each second connecting rod, the diameter of each screw hole is the same as the height of the corresponding second fixing hole, and a fixing bolt is screwed in each second fixing hole and each screw hole so that the second connecting rods can be fixed on the rotating blocks;
the telescopic link includes:
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 one end of which is fixedly connected with one end of the second barrel and the periphery of which is 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 which are arranged at intervals along the circumferential direction, the inner diameter of one end, far away from the threaded barrel, of the claw ring is slightly smaller than the inner diameter of the connecting rod in a natural state, the second barrel comprises a screwing part which is sleeved with the threaded barrel, and a squeezing part which is arranged at one end, close to the sleeve, of the second barrel, and when the screwing part is screwed with the threaded barrel, the squeezing part can be gradually pushed, pulled and inclined inwards and can correspondingly and tightly press the claw ring;
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.
2. The external fixator for pelvic fracture according to claim 1, wherein the pressing portion has a ring of flange on the inner wall of the end near the sleeve, and the inner diameter of the flange is equal to the diameter of the connecting rod.
3. The external fixator for pelvic fracture according to claim 1, wherein a circle of abutting edge is arranged on the outer wall of the end of the connecting rod connected with the second sleeve, a circle of second flange is arranged on the inner wall of the end of the second sleeve sleeved with the connecting rod, and the outer diameter of the abutting edge is larger than the inner diameter of the second flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911191017.9A CN110840539B (en) | 2019-11-28 | 2019-11-28 | External fixing frame for pelvic fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911191017.9A CN110840539B (en) | 2019-11-28 | 2019-11-28 | External fixing frame for pelvic fracture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110840539A CN110840539A (en) | 2020-02-28 |
| CN110840539B true CN110840539B (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911191017.9A Expired - Fee Related CN110840539B (en) | 2019-11-28 | 2019-11-28 | External fixing frame for pelvic fracture |
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| Country | Link |
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| CN (1) | CN110840539B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267504A (en) * | 2000-01-08 | 2000-09-27 | 苏继承 | External pelvis-repositioning fixer |
| CN201139626Y (en) * | 2008-01-18 | 2008-10-29 | 支小卫 | Three-dimensional thread type externally fixing rack |
| CN201481329U (en) * | 2009-06-19 | 2010-05-26 | 陈希林 | Expansion articulated type mop |
| CN207545727U (en) * | 2017-12-06 | 2018-06-29 | 张淏森 | A kind of student's physical fitness training equipment |
| CN109864811A (en) * | 2019-04-02 | 2019-06-11 | 王庆元 | Pelvic fracture replacement and fixation external member |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2102026C1 (en) * | 1994-10-06 | 1998-01-20 | Иркутский государственный медицинский институт Минздрава РФ | External fixation device for treating fractures and false joints in long bones |
-
2019
- 2019-11-28 CN CN201911191017.9A patent/CN110840539B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267504A (en) * | 2000-01-08 | 2000-09-27 | 苏继承 | External pelvis-repositioning fixer |
| CN201139626Y (en) * | 2008-01-18 | 2008-10-29 | 支小卫 | Three-dimensional thread type externally fixing rack |
| CN201481329U (en) * | 2009-06-19 | 2010-05-26 | 陈希林 | Expansion articulated type mop |
| CN207545727U (en) * | 2017-12-06 | 2018-06-29 | 张淏森 | A kind of student's physical fitness training equipment |
| CN109864811A (en) * | 2019-04-02 | 2019-06-11 | 王庆元 | Pelvic fracture replacement and fixation external member |
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| CN110840539A (en) | 2020-02-28 |
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