CN110680455A - Reamer for medullary cavity - Google Patents
Reamer for medullary cavity Download PDFInfo
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- CN110680455A CN110680455A CN201911021045.6A CN201911021045A CN110680455A CN 110680455 A CN110680455 A CN 110680455A CN 201911021045 A CN201911021045 A CN 201911021045A CN 110680455 A CN110680455 A CN 110680455A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/164—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans intramedullary
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1659—Surgical rasps, files, planes, or scrapers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
- A61B17/1664—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip
- A61B17/1668—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip for the upper femur
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Abstract
The invention discloses a medullary cavity reamer, wherein a rotary handle controls a sliding screw rod to axially rotate, the sliding screw rod drives a connecting rod and a sliding cross rod to slide in a transverse sliding groove, and a U-shaped sliding plate is resisted in an inclined sliding groove, so that the U-shaped sliding plate is pushed by the sliding cross rod to extend out of a telescopic base along the direction far away from a rod body, and further drives a first cutter head to respectively slide towards the direction far away from the rod body, so that the cross section area of the medullary cavity reamer is enlarged, the range of the rotating surface of the medullary cavity reamer is enlarged, the medullary cavity reamers with different specifications and models do not need to be replaced for many times in the operation process, and the operation error caused by the replacement of tools for many times is avoided.
Description
Technical Field
The invention relates to the field of orthopedic medical equipment, in particular to a medullary cavity reamer.
Background
At present, with the progress of medical technology in China, more and more diseases can be treated by minimally invasive surgery, the minimally invasive surgery is minimally invasive surgery as the name implies, and the harm of the minimally invasive surgery to human bodies is much lower than that of the traditional surgery. Minimally invasive surgery has the advantages of small wound, light pain, quick recovery and the like, so more and more people choose to treat diseases by adopting the minimally invasive surgery. In the field of minimally invasive spinal surgery, spinal endoscopic minimally invasive surgery is a core technology in the field.
The medullary cavity reamer is mainly used for reaming the medullary cavity of the femur and has the specification of 9-16 mm. The conventional reaming scheme is mainly characterized in that the medullary cavity is gradually enlarged by using the medullary cavity reamers from small to large, the medullary cavity reamers with different specifications are required to be operated in the process of enlarging the medullary cavity, so that the medullary cavity reamers need to be replaced for many times in the operation process, and the risk of operation errors is increased.
Disclosure of Invention
The invention aims to provide a reamer, which aims to solve the technical problems that reamers with various specifications are required for reaming a femoral medullary cavity in the prior art, the medullary cavity is gradually enlarged, and the reamer replacement for many times in the operation process increases the risk of operation errors.
In order to achieve the purpose, the reamer for the medullary cavity comprises a rod body, a rotary handle, a sliding lead screw, a telescopic device and a first cutter head, wherein the rod body is provided with a transverse sliding groove, the transverse sliding groove is positioned on the side surface of the rod body and is horizontally arranged along the extension direction of the rod body, the rotary handle is rotatably connected with the rod body and is positioned at one end of the rod body, which is far away from the transverse sliding groove, the sliding lead screw is rotatably connected with the rotary handle, is slidably connected with the rod body and is positioned inside the rod body, the telescopic device is fixedly connected with the sliding lead screw, is slidably connected with the rod body and is positioned in the transverse sliding groove, part of the telescopic device extends out of the outer side wall of the rod body, and the first cutter head is slidably connected with the telescopic device, and the sliding direction faces the direction far away from the; the telescopic device comprises a connecting rod, a sliding cross rod and a spreading assembly, the connecting rod is fixedly connected with the sliding lead screw, is connected with the rod body in a sliding manner, is positioned in the transverse sliding groove, extends out of the rod body in the direction away from the rod body, is fixedly connected with the connecting rod and is positioned at one end of the connecting rod away from the rod body, and the spreading assembly is connected with the sliding cross rod in a sliding manner, is fixedly connected with the first cutter head and faces in the direction away from the rod body in the sliding direction; the utility model discloses a telescopic connecting rod, including the telescopic connecting rod, the U-shaped slide board is connected with telescopic connecting rod, and with first tool bit fixed connection, and keep away from the one end of first tool bit stretches into telescopic connecting rod's inside, the U-shaped slide board has the slope spout, the slope spout is located the side of U-shaped slide board, and slope setting in the side of U-shaped slide board, the slip horizontal pole stretches into in the slope spout, with U-shaped slide board butt.
The connecting rods are arranged in a plurality of numbers and uniformly surround the outer side surface of the rod body, and the extension lines of the central axes are intersected on the central axis of the rod body; the number of the sliding cross rods is consistent with that of the connecting rods, and the sliding cross rods are respectively positioned at one end of each connecting rod, which is far away from the rod body; the number of the telescopic bases is consistent with that of the connecting rods, and the telescopic bases are respectively arranged on the outer sides of the connecting rods in an enclosing manner; the number of the U-shaped sliding plates is consistent with that of the sliding cross rods, and the U-shaped sliding plates are respectively connected with the sliding cross rods in a sliding manner; the number of the first cutter heads is consistent with that of the U-shaped sliding plates, and the first cutter heads are mutually abutted.
The sliding screw rod comprises a threaded screw rod and a sliding block, the threaded screw rod is fixedly connected with the rotating handle, is rotatably connected with the rod body and is positioned inside the rod body; the slider with the body of rod sliding connection to with the screw thread lead screw rotates to be connected, and is located the screw thread lead screw with between the body of rod.
The rotary handle comprises a rotary stepping motor and a control switch, the rotary stepping motor is rotationally connected with the threaded screw rod, is fixedly connected with the rod body and is positioned at the end part of the rod body, which is far away from the transverse sliding groove; the control switch is connected with the rotary stepping motor and is positioned on one side of the rotary stepping motor, which is far away from the threaded screw rod, so as to control the rotation of the rotary stepping motor.
The strutting assembly further comprises a limiting clamp, wherein the limiting clamp is fixedly connected with the U-shaped sliding plate, is clamped with the sliding cross rod and is positioned on the side wall of the inclined sliding groove.
The telescopic device further comprises an auxiliary blade, wherein the auxiliary blade is detachably connected with the first blade, is positioned on one side of the first blade far away from the U-shaped sliding plate and faces the direction far away from the U-shaped sliding plate.
The first cutter head is provided with a through hole which penetrates through the first cutter head and faces to a position between the U-shaped sliding plate and the first cutter head; the intramedullary cavity reamer also comprises a storage box, the storage box is fixedly connected with the telescopic base, and the opening of the storage box faces the direction of the through hole and is communicated with the through hole.
The storage box comprises a fixed box body and a telescopic box body, wherein the fixed box body is fixedly connected with the telescopic base and is positioned on the outer side surface of the telescopic base, which is far away from the U-shaped sliding plate; the telescopic box body is connected with the fixed box body in a sliding mode, fixedly connected with the first cutter head and arranged around the periphery of the through hole in a surrounding mode and communicated with the through hole.
The intramedullary cavity reamer also comprises a second cutter head, wherein the second cutter head is fixedly connected with the rod body and is arranged on the outer surface of the rod body in a surrounding manner and is positioned between the connecting rod and the rotating handle.
The reamer comprises a rod body, a first cutter head and a second cutter head, wherein the reamer also comprises a slide rail, the slide rail is fixedly connected with the rod body and is in sliding connection with the second cutter head, and the slide rail is positioned between the rod body and the second cutter head and drives the second cutter head to slide in the length direction of the rod body.
In the reamer for medullary cavity, the control switch controls the rotary stepping motor to drive the threaded screw rod to axially rotate, the thread screw rod and the slide block are in thread rotation to drive the slide block to slide in the rod body, thereby driving the four connecting rods and the four sliding cross rods to respectively slide horizontally along the length direction of the rod body, the U-shaped sliding plate is further resisted in the inclined sliding chute, so that the U-shaped sliding plate is pushed by the sliding cross rod to extend out of the telescopic base along the direction far away from the rod body, thereby driving the four first cutter heads to respectively slide towards the direction far away from the rod body, expanding the cross section area of the intramedullary canal reamer and further expanding the range of the rotating surface of the intramedullary canal reamer, the intramedullary cavity reamers with different specifications and models do not need to be replaced for many times in the operation process, so that operation errors caused by tool replacement for many times are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the overall construction of the intramedullary canal reamer of the present invention.
Fig. 2 is a schematic structural view of the telescopic device of the present invention.
Fig. 3 is a schematic view of the cutting component of the intramedullary reamer of the present invention.
In the figure: the cutting tool comprises a 1-rod body, a 2-rotating handle, a 3-sliding screw rod, a 4-telescopic device, a 5-first cutter head, a 6-storage box, a 7-second cutter head, an 8-sliding rail, a 11-transverse sliding groove, a 21-rotating stepping motor, a 22-control switch, a 31-threaded screw rod, a 32-sliding block, a 41-connecting rod, a 42-sliding cross rod, a 43-opening component, a 44-auxiliary blade, a 51-through hole, a 61-fixed box body, a 62-telescopic box body, a 100-medullary cavity reamer, a 431-telescopic base, a 432-U-shaped sliding plate, a 433-inclined sliding groove and a 434-limiting clamp.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In a first example of the present embodiment:
referring to fig. 1 to 3, the present invention provides a reamer 100 for medullary cavity, including a rod body 1, a rotating handle 2, a sliding screw rod 3, a telescopic device 4 and a first cutter head 5, wherein the rod body 1 has a transverse sliding slot 11, the transverse sliding slot 11 is located on a side surface of the rod body 1 and horizontally arranged along an extension direction of the rod body 1, the rotating handle 2 is rotatably connected with the rod body 1 and located at one end of the rod body 1 away from the transverse sliding slot 11, the sliding screw rod 3 is rotatably connected with the rotating handle 2 and slidably connected with the rod body 1 and located inside the rod body 1, the telescopic device 4 is fixedly connected with the sliding screw rod 3 and slidably connected with the rod body 1 and located inside the transverse sliding slot 11 and partially extending out of an outer side wall of the rod body 1, the first cutter head 5 is slidably connected with the telescopic device 4, the sliding direction faces to the direction far away from the side wall of the rod body 1; the telescopic device 4 comprises a connecting rod 41, a sliding cross rod 42 and a spreading component 43, the connecting rod 41 is fixedly connected with the sliding screw rod 3, is connected with the rod body 1 in a sliding manner, is positioned in the transverse sliding groove 11, extends out of the rod body 1 in the direction away from the rod body 1, the sliding cross rod 42 is fixedly connected with the connecting rod 41 and is positioned at one end of the connecting rod 41 away from the rod body 1, the spreading component 43 is connected with the sliding cross rod 42 in a sliding manner, is fixedly connected with the first cutter head 5, and faces in the direction away from the rod body 1 in the sliding direction; the subassembly 43 struts includes flexible base 431 and U-shaped slide 432, flexible base 431 with body of rod 1 fixed connection, and enclose and establish the outside of connecting rod 41, U-shaped slide 432 with flexible base 431 sliding connection, and with first tool bit 5 fixed connection, and keep away from the one end of first tool bit 5 stretches into flexible base 431's inside, U-shaped slide 432 has slope spout 433, slope spout 433 is located U-shaped slide 432's side, and slope setting is in on the side of U-shaped slide 432, slide horizontal pole 42 stretches into in the slope spout 433, with U-shaped slide 432 butt.
Furthermore, the number of the connecting rods 41 is multiple, the connecting rods are uniformly arranged around the outer side surface of the rod body 1, and the extension lines of the central axes are intersected on the central axis of the rod body 1; the number of the sliding cross rods 42 is the same as that of the connecting rods 41, and the sliding cross rods 42 are respectively positioned at one end of each connecting rod 41 far away from the rod body 1; the number of the telescopic bases 431 is the same as that of the connecting rods 41, and the telescopic bases are respectively arranged around the outer sides of the connecting rods 41; the number of the U-shaped sliding plates 432 is the same as that of the sliding cross bars 42, and the U-shaped sliding plates are respectively connected with the sliding cross bars 42 in a sliding manner; the number of the first cutter heads 5 is the same as that of the U-shaped sliding plate 432, and a plurality of the first cutter heads 5 are abutted against each other.
Further, the sliding screw rod 3 comprises a threaded screw rod 31 and a sliding block 32, the threaded screw rod 31 is fixedly connected with the rotating handle 2, is rotatably connected with the rod body 1, and is positioned inside the rod body 1; the sliding block 32 is connected with the rod body 1 in a sliding mode, is connected with the threaded screw rod 31 in a rotating mode, and is located between the threaded screw rod 31 and the rod body 1.
Further, the rotating handle 2 comprises a rotating stepping motor 21 and a control switch 22, the rotating stepping motor 21 is rotatably connected with the threaded screw rod 31, is fixedly connected with the rod body 1, and is located at the end part of the rod body 1 far away from the transverse sliding groove 11; the control switch 22 is connected to the rotary stepping motor 21 and located on one side of the rotary stepping motor 21 away from the threaded screw rod 31 to control the rotation of the rotary stepping motor 21.
Further, the expanding assembly 43 further comprises a limiting clamp 434, wherein the limiting clamp 434 is fixedly connected with the U-shaped sliding plate 432, clamped with the sliding cross bar 42, and located on the side wall of the inclined sliding groove 433.
Further, the telescopic device 4 further comprises an auxiliary blade 44, wherein the auxiliary blade 44 is detachably connected to the first blade 5, and is located on a side of the first blade 5 away from the U-shaped sliding plate 432 and faces away from the U-shaped sliding plate 432.
In this embodiment, the rod body 1 is a hollow cylinder, the front end of the rod body is fixed with a guiding soft rod, and is used for extending into the medullary cavity, and the guiding soft liver end of the rod body 1 is far away from the rotating handle 2, the shell of the rotating handle 2 is in a T shape, the upper surface of the T-shaped shell of the rotating handle 2 is provided with the control switch 22, the inside of the rotating handle 2 is provided with the rotating stepping motor 21, the stroke and the steering of the rotating stepping motor 21 are controlled by the control switch 22, one end of the threaded screw rod 31 is in threaded fixation with the output shaft of the rotating stepping motor 21, the other end of the threaded screw rod extends to the front end of the rod body 1 along the long direction of the rod body 1 and is connected with the rod body 1 in a rotating manner, the slider 32 is a rectangular slider 32 and is horizontally clamped with the inner surface of the rod body 1, and the center of the slider 32 is provided with a threaded hole matched, the rotary stepping motor 21 drives the threaded screw rod 31 to rotate, and further drives the sliding block 32 to slide along the length direction of the rod body 1; the side of the rod body 1 is provided with four transverse sliding grooves 11, which are arranged around the outer surface of the rod body 1 and located in four mutually perpendicular directions, and are horizontally arranged along the long direction of the rod body 1, the connecting rods 41 are integrally formed with the slider 32, the number of the connecting rods 41 is four, the four connecting rods are respectively fixed on four sides of the same horizontal plane of the slider 32, the four transverse sliding grooves 11 penetrate out of the rod body 1, one ends of the four connecting rods 41, which are far away from the slider 32, are respectively connected with four sliding cross rods 42, the central axis of the sliding cross rods 42 is perpendicular to the central axis of the connecting rods 41 and perpendicular to the central axis of the rod body 1, the telescopic bases 431 are hollow shells, the four telescopic bases 431 are respectively located at the peripheries of the four connecting rods 41, and the bottoms of the telescopic bases are fixed at, the sliding rod is fixed with the rod body 1 through threads, the U-shaped sliding plate 432 is in an inverted U shape, the U-shaped opening faces the inside of the telescopic base 431, the four U-shaped sliding plates 432 are respectively and slidably connected with the inside of the four telescopic bases 431, the U-shaped sliding plate 432 is provided with openings at two sides, the directions of the openings at two sides are in the same direction as the extending direction of the rod body 1, two side plates of the U-shaped sliding plate 432 are slidably connected with the inner surface of the telescopic base 431, the two side plates of the U-shaped sliding plate 432 are provided with the inclined sliding grooves 433, the inclined sliding grooves 433 are linear sliding grooves, the front end and the rear end of each inclined sliding groove face the right-angle corner of the rectangular side plate of the U-shaped sliding plate 432, two ends of the sliding cross rod 42 respectively extend into the inclined sliding grooves 433, the long direction of the inclined sliding grooves 433 and the sliding direction of the sliding cross rod 42 form an included angle of 45 degrees, and the sliding cross rod 42, the limiting clamp 434 is fixed on the groove wall of the inclined sliding groove 433, the sliding cross bar 42 is extruded by a spring, the friction force between the sliding cross bar 42 and the U-shaped sliding plate 432 is increased, and the sliding cross bar 42 is limited without being pushed by an external force, four first cutter heads 5 are respectively fixed on one ends of the four U-shaped sliding plates 432 far away from the telescopic base 431 in a threaded manner, the cutter heads are positioned on the left side and the right side of the first cutter head 5 far away from the U-shaped sliding plate 432, the auxiliary cutter blades 44 are installed on one ends of the first cutter heads 5 facing the U-shaped sliding plate 432, the auxiliary cutter blades 44 are provided with a plurality of cutter blades extending in the direction far away from the U-shaped sliding plate 432, so that the control switch 22 is controlled, and the rotary stepping motor 21 drives the threaded screw rod 31 to axially rotate, the threaded screw rod 31 and the sliding block 32 are rotated in a threaded manner to drive the sliding block 32 to slide in the rod body 1, so that the four connecting rods 41 and the four sliding cross rods 42 are driven to horizontally slide along the long direction of the rod body 1 respectively, the U-shaped sliding plate 432 is resisted in the inclined sliding groove 433, the U-shaped sliding plate 432 is driven to stretch out of the telescopic base 431 along the direction far away from the rod body 1 by the thrust of the sliding cross rods 42, the four first tool bits 5 are driven to slide towards the direction far away from the rod body 1 respectively, the cross section area of the medullary cavity reamer 100 is enlarged, the range of the rotating surface of the medullary cavity reamer 100 is enlarged, the medullary cavity reamers 100 with different specifications and models do not need to be replaced for many times in the operation process, and the operation error caused by the replacement of tools for many times is.
In a second example of the present embodiment:
referring to fig. 1 and 3, the present invention provides a reamer 100 for medullary cavity, including a rod body 1, a rotating handle 2, a sliding screw rod 3, a telescopic device 4 and a first cutter head 5, wherein the rod body 1 has a horizontal sliding slot 11, the horizontal sliding slot 11 is located on a side surface of the rod body 1 and horizontally arranged along an extension direction of the rod body 1, the rotating handle 2 is rotatably connected with the rod body 1 and located at one end of the rod body 1 away from the horizontal sliding slot 11, the sliding screw rod 3 is rotatably connected with the rotating handle 2 and slidably connected with the rod body 1 and located inside the rod body 1, the telescopic device 4 is fixedly connected with the sliding screw rod 3 and slidably connected with the rod body 1 and located inside the horizontal sliding slot 11 and partially extends out of an outer side wall of the rod body 1, the first cutter head 5 is slidably connected with the telescopic device 4, the sliding direction faces to the direction far away from the side wall of the rod body 1; the telescopic device 4 comprises a connecting rod 41, a sliding cross rod 42 and a spreading component 43, the connecting rod 41 is fixedly connected with the sliding screw rod 3, is connected with the rod body 1 in a sliding manner, is positioned in the transverse sliding groove 11, extends out of the rod body 1 in the direction away from the rod body 1, the sliding cross rod 42 is fixedly connected with the connecting rod 41 and is positioned at one end of the connecting rod 41 away from the rod body 1, the spreading component 43 is connected with the sliding cross rod 42 in a sliding manner, is fixedly connected with the first cutter head 5, and faces in the direction away from the rod body 1 in the sliding direction; the subassembly 43 struts includes flexible base 431 and U-shaped slide 432, flexible base 431 with body of rod 1 fixed connection, and enclose and establish the outside of connecting rod 41, U-shaped slide 432 with flexible base 431 sliding connection, and with first tool bit 5 fixed connection, and keep away from the one end of first tool bit 5 stretches into flexible base 431's inside, U-shaped slide 432 has slope spout 433, slope spout 433 is located U-shaped slide 432's side, and slope setting is in on the side of U-shaped slide 432, slide horizontal pole 42 stretches into in the slope spout 433, with U-shaped slide 432 butt.
Further, the first blade head 5 has a through hole 51, and the through hole 51 penetrates through the first blade head 5 and faces between the U-shaped sliding plate 432 and the first blade head 5; the intramedullary cavity reamer 100 further comprises a storage box 6, wherein the storage box 6 is fixedly connected with the telescopic base 431, and is opened towards the through hole 51 and communicated with the through hole 51.
Further, the storage box 6 comprises a fixed box 61 and a telescopic box 62, wherein the fixed box 61 is fixedly connected with the telescopic base 431 and is positioned on the outer side surface of the telescopic base 431 away from the U-shaped sliding plate 432; the telescopic box body 62 is connected with the fixed box body 61 in a sliding mode, is fixedly connected with the first cutter head 5, and is arranged around the periphery of the through hole 51 and communicated with the through hole 51.
In this embodiment, the bottoms of the four telescopic bases 431 are connected in a cross shape, the ends of the four telescopic bases 431 are connected with the first cutting head 5, the bottom ends of the four first cutting heads 5 are abutted against the top end of the adjacent first cutting head 5, the adjacent two first cutting heads 5 and the two telescopic bases 431 inside form a cavity, the through hole 51 is located at the connection position of the plurality of auxiliary blades 44, penetrates through the first cutting head 5, and is communicated with the cavity inside, the bottom of the fixed box 61 is fixed at the connection position of the two telescopic bases 431 by threads, the inner part of the fixed box is hollow, the bottom of the telescopic box 62 is located inside the fixed box 61 and slides on the inner side wall of the fixed box 61, the upper end of the telescopic box 62 is connected with the first cutting head 5, and the opening of the telescopic box 62 is communicated with the through hole 51, the telescopic box 62 extends out or retracts into the fixed box 61 under the driving of the first cutting head 5, when the marrow in the marrow cavity is cut, certain bone fragments are generated, and the bone fragments enter the telescopic box body 62 and the fixed box body 61 along the through hole 51 on the surface of the first cutter head 5 to be stored, so that unnecessary influence on the operation caused by the retention of a large amount of bone fragments in the marrow cavity is avoided.
In a first example of the present embodiment:
referring to fig. 1 and 3, the present invention provides a reamer 100 for medullary cavity, including a rod body 1, a rotating handle 2, a sliding screw rod 3, a telescopic device 4 and a first cutter head 5, wherein the rod body 1 has a horizontal sliding slot 11, the horizontal sliding slot 11 is located on a side surface of the rod body 1 and horizontally arranged along an extension direction of the rod body 1, the rotating handle 2 is rotatably connected with the rod body 1 and located at one end of the rod body 1 away from the horizontal sliding slot 11, the sliding screw rod 3 is rotatably connected with the rotating handle 2 and slidably connected with the rod body 1 and located inside the rod body 1, the telescopic device 4 is fixedly connected with the sliding screw rod 3 and slidably connected with the rod body 1 and located inside the horizontal sliding slot 11 and partially extends out of an outer side wall of the rod body 1, the first cutter head 5 is slidably connected with the telescopic device 4, the sliding direction faces to the direction far away from the side wall of the rod body 1; the telescopic device 4 comprises a connecting rod 41, a sliding cross rod 42 and a spreading component 43, the connecting rod 41 is fixedly connected with the sliding screw rod 3, is connected with the rod body 1 in a sliding manner, is positioned in the transverse sliding groove 11, extends out of the rod body 1 in the direction away from the rod body 1, the sliding cross rod 42 is fixedly connected with the connecting rod 41 and is positioned at one end of the connecting rod 41 away from the rod body 1, the spreading component 43 is connected with the sliding cross rod 42 in a sliding manner, is fixedly connected with the first cutter head 5, and faces in the direction away from the rod body 1 in the sliding direction; the subassembly 43 struts includes flexible base 431 and U-shaped slide 432, flexible base 431 with body of rod 1 fixed connection, and enclose and establish the outside of connecting rod 41, U-shaped slide 432 with flexible base 431 sliding connection, and with first tool bit 5 fixed connection, and keep away from the one end of first tool bit 5 stretches into flexible base 431's inside, U-shaped slide 432 has slope spout 433, slope spout 433 is located U-shaped slide 432's side, and slope setting is in on the side of U-shaped slide 432, slide horizontal pole 42 stretches into in the slope spout 433, with U-shaped slide 432 butt.
Further, the intramedullary canal reamer 100 further comprises a second cutter head 7, wherein the second cutter head 7 is fixedly connected with the rod body 1, surrounds the outer surface of the rod body 1, and is positioned between the connecting rod 41 and the rotating handle 2.
Further, the reamer 100 further comprises a slide rail 8, wherein the slide rail 8 is fixedly connected with the rod body 1, is connected with the second cutter head 7 in a sliding manner, and is positioned between the rod body 1 and the second cutter head 7 to drive the second cutter head 7 to slide along the length direction of the rod body 1.
In this embodiment, the slide rail 8 is fixed to the outer side of the shaft body 1 in a threaded manner, surrounds the shaft body 1, and extends in the longitudinal direction of the shaft body 1, the cross-sectional dimension of the second cutter head 7 is the maximum cross-sectional dimension of the first cutter head 5, the second cutter head 7 is installed between the first cutter head 5 and the rotary handle 2, and the distance between the second cutter head and the first cutter head 5 can be adjusted through the slide rail 8, so that when a deeper medullary cavity is encountered during reaming, the first cutter head 5 located at the front end performs medullary expansion, and the second cutter head 7 located at the rear end further reams the medullary cavity, so that the physiological curvature in the medullary cavity, especially the physiological curvature of a femur in the medullary cavity, can be better adapted to the physiological curvature of the medullary cavity, so that the medullary cavity reamer 100 can be inserted into the medullary cavity more smoothly, and surgical errors caused by poor fit between the medullary.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A reamer for medullary cavity, which is characterized by comprising a rod body, a rotating handle, a sliding screw rod, a telescopic device and a first cutter head,
the telescopic device comprises a rod body, a first tool bit and a telescopic device, wherein the rod body is provided with a transverse sliding groove, the transverse sliding groove is positioned on the side surface of the rod body and is horizontally arranged along the extending direction of the rod body, a rotating handle is rotatably connected with the rod body and is positioned at one end of the rod body, which is far away from the transverse sliding groove, a sliding lead screw is rotatably connected with the rotating handle and is slidably connected with the rod body and is positioned in the rod body, the telescopic device is fixedly connected with the sliding lead screw, is slidably connected with the rod body and is positioned in the transverse sliding groove, part of the telescopic lead screw extends out of the outer side wall of the rod body, and the first tool bit is slidably connected with the telescopic device;
the telescopic device comprises a connecting rod, a sliding cross rod and a spreading assembly, the connecting rod is fixedly connected with the sliding lead screw, is connected with the rod body in a sliding manner, is positioned in the transverse sliding groove, extends out of the rod body in the direction away from the rod body, is fixedly connected with the connecting rod and is positioned at one end of the connecting rod away from the rod body, and the spreading assembly is connected with the sliding cross rod in a sliding manner, is fixedly connected with the first cutter head and faces in the direction away from the rod body in the sliding direction;
the utility model discloses a telescopic connecting rod, including the telescopic connecting rod, the U-shaped slide board is connected with telescopic connecting rod, and with first tool bit fixed connection, and keep away from the one end of first tool bit stretches into telescopic connecting rod's inside, the U-shaped slide board has the slope spout, the slope spout is located the side of U-shaped slide board, and slope setting in the side of U-shaped slide board, the slip horizontal pole stretches into in the slope spout, with U-shaped slide board butt.
2. The intramedullary reamer of claim 1 wherein,
the number of the connecting rods is multiple, the connecting rods are uniformly arranged around the outer side face of the rod body, and the extension lines of the central axes are intersected on the central axis of the rod body; the number of the sliding cross rods is consistent with that of the connecting rods, and the sliding cross rods are respectively positioned at one end of each connecting rod, which is far away from the rod body; the number of the telescopic bases is consistent with that of the connecting rods, and the telescopic bases are respectively arranged on the outer sides of the connecting rods in an enclosing manner; the number of the U-shaped sliding plates is consistent with that of the sliding cross rods, and the U-shaped sliding plates are respectively connected with the sliding cross rods in a sliding manner; the number of the first cutter heads is consistent with that of the U-shaped sliding plates, and the first cutter heads are mutually abutted.
3. The intramedullary reamer of claim 2 wherein,
the sliding screw rod comprises a threaded screw rod and a sliding block, the threaded screw rod is fixedly connected with the rotating handle, is rotatably connected with the rod body and is positioned inside the rod body; the slider with the body of rod sliding connection to with the screw thread lead screw rotates to be connected, and is located the screw thread lead screw with between the body of rod.
4. The intramedullary reamer of claim 3 wherein,
the rotary handle comprises a rotary stepping motor and a control switch, the rotary stepping motor is rotationally connected with the threaded screw rod, is fixedly connected with the rod body and is positioned at the end part of the rod body far away from the transverse sliding groove; the control switch is connected with the rotary stepping motor and is positioned on one side of the rotary stepping motor, which is far away from the threaded screw rod, so as to control the rotation of the rotary stepping motor.
5. The intramedullary reamer of claim 4 wherein,
the strutting assembly further comprises a limiting clamp, wherein the limiting clamp is fixedly connected with the U-shaped sliding plate, is clamped with the sliding cross rod and is positioned on the side wall of the inclined sliding groove.
6. The intramedullary reamer of claim 5 wherein,
the telescopic device further comprises an auxiliary blade, wherein the auxiliary blade is detachably connected with the first blade, is positioned on one side, far away from the U-shaped sliding plate, of the first blade and faces the direction far away from the U-shaped sliding plate.
7. The intramedullary reamer of claim 1 wherein,
the first cutter head is provided with a through hole which penetrates through the first cutter head and faces to a position between the U-shaped sliding plate and the first cutter head; the intramedullary cavity reamer also comprises a storage box, the storage box is fixedly connected with the telescopic base, and the opening of the storage box faces the direction of the through hole and is communicated with the through hole.
8. The intramedullary reamer of claim 7 wherein,
the storage box comprises a fixed box body and a telescopic box body, wherein the fixed box body is fixedly connected with the telescopic base and is positioned on the outer side surface of the telescopic base, which is far away from the U-shaped sliding plate; the telescopic box body is connected with the fixed box body in a sliding mode, fixedly connected with the first cutter head and arranged around the periphery of the through hole in a surrounding mode and communicated with the through hole.
9. The intramedullary reamer of claim 8 wherein,
the medullary cavity reamer also comprises a second cutter head, wherein the second cutter head is fixedly connected with the rod body and is arranged on the outer surface of the rod body in a surrounding manner and is positioned between the connecting rod and the rotating handle.
10. The intramedullary reamer of claim 9 wherein,
the marrow cavity reamer also comprises a slide rail, wherein the slide rail is fixedly connected with the rod body, is in sliding connection with the second cutter head, is positioned between the rod body and the second cutter head, and drives the second cutter head to slide in the long direction of the rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911021045.6A CN110680455A (en) | 2019-10-25 | 2019-10-25 | Reamer for medullary cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911021045.6A CN110680455A (en) | 2019-10-25 | 2019-10-25 | Reamer for medullary cavity |
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| Publication Number | Publication Date |
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| CN110680455A true CN110680455A (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911021045.6A Pending CN110680455A (en) | 2019-10-25 | 2019-10-25 | Reamer for medullary cavity |
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| Country | Link |
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| CN (1) | CN110680455A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111227902A (en) * | 2020-02-20 | 2020-06-05 | 中国人民解放军陆军军医大学第一附属医院 | Reaming device for orthopedics |
| CN116787274A (en) * | 2023-08-23 | 2023-09-22 | 内蒙古北科交大机器人有限公司 | Aluminum electrolysis charcoal anode grinding device |
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Application publication date: 20200114 |