CN112043470A - Threaded rod interchangeable acetabular cup installer - Google Patents
Threaded rod interchangeable acetabular cup installer Download PDFInfo
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- CN112043470A CN112043470A CN202010993308.6A CN202010993308A CN112043470A CN 112043470 A CN112043470 A CN 112043470A CN 202010993308 A CN202010993308 A CN 202010993308A CN 112043470 A CN112043470 A CN 112043470A
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- threaded rod
- pin
- hole
- internal transmission
- rod
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4625—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
- A61F2002/4627—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4629—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof connected to the endoprosthesis or implant via a threaded connection
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- Health & Medical Sciences (AREA)
- Transplantation (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Physical Education & Sports Medicine (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention relates to an acetabular cup installer with an interchangeable threaded rod, which comprises a threaded rod interchange structure, a cup clamping head, a guide sleeve, an internal transmission structure protective shell, a first transmission rod, a universal joint structure, a first pin, a second transmission rod, a second pin, a connecting sleeve, a control pressure plate, a third pin and a silica gel handle, wherein the threaded rod interchange structure is in taper fit connection with the internal transmission structure protective shell through the cup clamping head; the internal transmission structure protection shell is of a trapezoidal structure with four inflection points, a groove for placing the internal transmission structure is formed in the top of the internal transmission structure protection shell, a notch for reducing weight and cleaning is formed in one side of the bottom of the internal transmission structure protection shell, a plurality of pin connecting holes are correspondingly formed in the side of the internal transmission structure protection shell, and the first pin, the second pin and the third pin respectively penetrate through different pin connecting holes to connect the internal transmission device with the internal transmission structure protection shell; one end of the protective shell of the internal transmission structure is provided with a conical hole connected with the clamping cup head; the other end is provided with a threaded hole connected with the silica gel handle.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an acetabular cup installer with interchangeable threaded rods.
Background
In the prior art, instruments used for installing acetabular prostheses in minimally invasive hip joint surgery can be divided into two types through screw sizes, wherein one type is an M6 threaded rod structure, the other type is an M10 threaded rod structure, and the two types of structures correspond to the acetabular cup prostheses with threaded holes of corresponding sizes.
The above-mentioned instrument can already be well used for completing the installation of the acetabular prosthesis in the operation, but the actual use of the instrument finds that the structure of the instrument has defects, so that the installer cannot achieve the optimal use effect in the actual application, and the defects are mainly reflected in:
because the connection thread strength of the acetabulum prosthesis and the installer is enhanced at home and abroad, the screw rod is prevented from being broken or slipping when the acetabulum prosthesis is installed and driven, the normal operation of the operation is influenced, the inner diameter and the outer diameter of the threaded hole and the threaded connecting rod are increased, the original M6 thread is changed into the M10 thread, and the corresponding installer is also changed correspondingly.
However, most of the acetabular prostheses which are circulated in the market and have the M6 threaded hole structure at present are estimated to completely consume five years or even longer of the old structured prostheses circulated in the market, so that the situation that the normal operation is affected because the prostheses are not matched with the equipped installer easily occurs when doctors carry out the total hip replacement operation in the period of time.
There are two methods for installing acetabular prostheses by complete hip replacement:
hospitals and doctors can only arrange the prosthesis with the structure corresponding to the instrument, but the difficulty of operation planning and the time for purchasing the prosthesis are increased.
Hospitals and doctors are equipped with two kinds of thread structure instruments simultaneously, and the cost is increased.
Disclosure of Invention
The invention aims to provide an acetabular cup installer with interchangeable threaded rods, and aims to solve the technical problems that how to enable an instrument to have the function of interchanging threaded rods of M6 and M10 and connect acetabular cup prostheses of M6 and M10, how to facilitate surgical planning and eliminate the intervention of prostheses of different structures on surgery, provide better surgical guarantee for patients and operators and improve the post-operative satisfaction degree of the patients.
In order to achieve the purpose, the invention provides an acetabular cup installer with an interchangeable threaded rod, which comprises a threaded rod interchange structure, a cup clamping head, a guide sleeve, an internal transmission structure protective shell, a first transmission rod, a universal joint structure, a first pin, a second transmission rod, a second pin, a connection sleeve, a control pressure plate, a third pin and a silica gel handle, wherein the threaded rod interchange structure is in taper fit connection with the internal transmission structure protective shell through the cup clamping head; the protective shell of the internal transmission structure is of a trapezoidal structure with four inflection points, a groove for placing the internal transmission structure is formed in the top of the protective shell of the internal transmission structure, a notch with the functions of weight reduction and cleaning is formed in one side of the bottom corresponding to the top of the protective shell of the internal transmission structure, a plurality of pin connecting holes are correspondingly formed in the side surface of the protective shell of the internal transmission structure, and the first pin, the second pin and the third pin respectively penetrate through different pin connecting holes to connect the internal transmission device with the protective shell of the internal transmission structure; one end of the protective shell of the internal transmission structure is provided with a conical hole connected with the clamping cup head; the other end is provided with a threaded hole connected with the silica gel handle; one end of the silica gel handle is a striking block, the other end of the silica gel handle is a threaded rod corresponding to the protective shell of the internal transmission structure, and the threaded rod is connected with the protective shell of the internal transmission structure through a threaded hole; the guide sleeve, the first transmission rod, the universal joint structure, the second transmission rod, the connecting sleeve and the control pressure plate form an internal transmission device; one end of the control pressure plate is provided with two connecting holes connected with the connecting sleeve and the protective shell of the internal transmission structure and a connecting sleeve mounting groove penetrating through the connecting sleeve connecting holes; the control pressure plate is connected with the protective shell of the internal transmission structure at the inflection point of the handle connection side through a second pin; one end of the connecting sleeve is provided with a connecting hole corresponding to the control pressure plate, the connecting hole is connected with the control pressure plate through a pin at the mounting groove, and the control pressure plate can rotate by taking the connecting pin of the protective shell with the internal structure as an axis; the connecting sleeve can rotate by taking the connecting pin of the control pressure plate as an axis; the other end of the connecting sleeve is provided with a connecting sleeve through hole, the second transmission rod penetrates through the connecting sleeve through hole and is in clearance fit with the connecting sleeve through hole, and the second transmission rod can axially slide; the guide sleeve is provided with a guide sleeve through hole which has the same size with the connecting sleeve through hole, a guide sleeve pin connecting hole is formed in the side face of the guide sleeve through hole, the first transmission rod or the second transmission rod penetrates through the guide sleeve through hole, the guide sleeve is fixedly connected with the protective shell of the internal transmission structure through the first pin, the guide sleeve pin connecting hole and the pin connecting hole in the side face of the protective shell of the internal transmission structure, and the first transmission rod or the second transmission rod can slide along the axial direction of the guide sleeve; the two ends of the universal joint structure are respectively provided with a universal joint connecting hole connected with the first transmission rod or the second transmission rod; the two sets of universal joint structures are respectively arranged at two inflection points close to the cup clamping head, one set of universal joint structure is arranged at an inflection point position far away from the cup clamping head, one end of the universal joint structure arranged at the inflection point position far away from the cup clamping head is connected with the second transmission rod, and the other end of the universal joint structure is connected with the first transmission rod; the other set of universal joint structure is arranged at the position of an inflection point close to the clamping cup head, one end of the universal joint structure arranged at the position of the inflection point close to the clamping cup head is connected with the first transmission rod, and the other end of the universal joint structure is connected with the connecting port connecting column of the threaded rod interchange structure.
The inner diameter of the cup clamping head is larger than the maximum outer diameter of the threaded rod interchange structure, so that the threaded rod interchange structure can axially move along the axis of the cup clamping head, and one end of the cup clamping head is provided with an anti-rotation flat position matched with the acetabulum prosthesis.
The threaded rod interchange structure comprises an interchange threaded rod, a screw rod connector, steel balls, a connector shell, a spring and a limiting sleeve, wherein a connector connecting column is arranged at one end of the screw rod connector, an insertion opening is formed at the other end of the screw rod connector, a hollow cavity extending along the axial direction is arranged in the screw rod connector, and the insertion opening is communicated with the hollow cavity; a circular slotted hole is formed in the side peripheral wall of the screw rod connecting port; the steel ball is arranged in the circular groove hole; one end of the interchange threaded rod is provided with a threaded rod connecting column which is inserted into the hollow cavity through the insertion hole; the other end of the interchange threaded rod is provided with a thread, and the interchange threaded rod is detachably connected with the acetabulum prosthesis through the thread; an annular groove is arranged on the side peripheral wall of the threaded rod connecting column; the connecting port shell is slidably sleeved on the peripheral wall of the screw connecting port; the inner wall of the connector shell is provided with a conical opening structure; the conical opening structure is abutted with the steel ball; a spring installation groove is formed between the inner wall of the connector shell and the outer peripheral wall of the screw connector; the spring is arranged in the spring mounting groove and sleeved on the peripheral wall of the screw rod connecting port; a table top is formed between the bottom surface of the conical opening structure and the spring mounting groove; one end of the limiting sleeve is inserted into the connector shell, the distance between the table top and the end face of the end, inserted into the connector shell, of the limiting sleeve is smaller than the free length of the spring, the spring is in a compressed state, the conical opening structure presses the steel balls into the circular groove hole through the elastic force of the spring, the bottom of the steel balls are in close contact with the annular groove, and the interchange threaded rod is clamped.
Preferably, the limiting sleeve is sleeved on the peripheral wall of the connecting port connecting column, and the limiting sleeve is fixedly connected with the connecting port connecting column through a pin.
The diameter of the circular slotted hole is smaller than that of the steel ball.
The position of the annular groove is arranged corresponding to the position of the circular groove hole.
The connection port housing is slidable in the axial direction of the screw connection port.
The inner diameter of the spring mounting groove is larger than the outer diameter of the spring; the outer diameter of the limiting sleeve is smaller than the inner diameter of the spring mounting groove, and the outer diameter of the limiting sleeve is larger than the outer diameter of the spring.
The interchange threaded rod is an M6 or M10 threaded rod.
The end part of the connecting port connecting column is welded with the internal transmission structure of the acetabulum cup installer.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that: the acetabulum cup installer with the interchangeable threaded rod can simultaneously install and connect acetabulum cup prostheses with M6 and M10 structures, is convenient for surgical planning to eliminate the intervention of the prostheses with different structures on a surgery, provides better surgical guarantee for patients and operators, and improves the satisfaction degree of the patients after the surgery.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a threaded rod interchangeable acetabular cup installer of the invention.
Fig. 2 is a front view of an acetabular cup installer with threaded rod interchangeability in accordance with the present invention.
Fig. 3 is a top view of the threaded rod interchangeable acetabular cup installer of the invention.
Fig. 4 is a schematic view of the internal structure of the threaded rod interchangeable acetabular cup installer of the present invention.
Fig. 5 is a front view of part I of the threaded rod interchangeable acetabular cup installer shown in fig. 1.
Fig. 6 is a sectional view taken in the direction of a-a in fig. 5.
Fig. 7 is a sectional view of the screw connection port.
Fig. 8 is a schematic view of the connection of the control pressure plate and the connection sleeve.
Fig. 9 is a front view of the connecting sleeve.
Fig. 10 is a side view of the control platen.
Fig. 11 is a front view of the control platen.
Fig. 12 is a schematic position diagram of the anti-rotation flat position.
Detailed Description
The present invention is described in more detail below to facilitate an understanding of the present invention.
As shown in fig. 1 to 7, the threaded rod interchangeable acetabular cup installer of the present invention comprises a threaded rod interchangeable structure 101, a cup clamping head 102, a guide sleeve 103, an internal transmission structure protective shell 104, a first transmission rod 105, a universal joint structure 106, a first pin 107, a second transmission rod 108, a second pin 109, a connecting sleeve 110, a control press plate 111, a third pin 112 and a silicone handle 113, wherein the threaded rod interchangeable structure 101 is conically coupled with the internal transmission structure protective shell 104 through the cup clamping head 102; the internal transmission structure protection shell 104 is a trapezoid structure with four inflection points, the top of the internal transmission structure protection shell 104 is provided with a groove 1041 for placing an internal transmission structure, one side of the bottom corresponding to the top of the internal transmission structure protection shell 104 is provided with a notch 1042 for reducing weight and cleaning, the side of the internal transmission structure protection shell 104 is correspondingly provided with a plurality of pin connection holes, and the first pin 107, the second pin 109 and the third pin 112 respectively penetrate through different pin connection holes to connect an internal transmission device with the internal transmission structure protection shell 104; one end of the protective shell 104 of the internal transmission structure is provided with a tapered hole 1043 connected with the head of the chuck; the other end is provided with a threaded hole 1044 connected with the silica gel handle 113; one end of the silica gel handle 113 is a striking block 114, and the other end is a threaded rod 115 corresponding to the internal transmission structure protective shell 104, and the threaded rod is connected with the internal transmission structure protective shell 104 through a threaded hole 1044; the guide sleeve 103, the first transmission rod 105, the universal joint structure 106, the second transmission rod 108, the connection sleeve 110 and the control pressing plate 111 form an internal transmission device; one end of the control pressure plate 111 is provided with two connection holes (i.e., a first connection hole 1111 and a second connection hole 1112, see fig. 8) connected to the connection sleeve 110 and the inner transmission structure shield case 104, and a connection sleeve mounting groove 1113 (see fig. 10) penetrating the connection sleeve connection hole 1102 (see fig. 9); the control pressure plate 111 is connected with the inner transmission structure protective shell 104 at the position of the inflection point of the handle connection side through a second pin 109; one end of the connecting sleeve is provided with a connecting hole corresponding to the control pressure plate, the connecting sleeve mounting groove is connected with the control pressure plate through a pin, the control pressure plate can rotate by taking the connecting pin 109 of the protective shell with an internal structure and the connecting sleeve as an axis, and the connecting pin of the control pressure plate (the position of the connecting pin of the control pressure plate is the position of the connecting hole, the pin is inserted into the connecting hole, and the control plate rotates by taking the pin as the axis); the other end of the connecting sleeve is provided with a connecting sleeve through hole 1101, the second transmission rod 108 penetrates through the connecting sleeve through hole 1101 and is in clearance fit, and the second transmission rod 108 can axially slide; the guide sleeve 103 is provided with a guide sleeve through hole which has the same size as the connecting sleeve through hole, a guide sleeve pin connecting hole is arranged on the side surface of the guide sleeve through hole, the first transmission rod 105 or the second transmission rod 108 penetrates through the guide sleeve through hole, the guide sleeve is fixedly connected with the internal transmission structure protection shell through the first pin 107, the guide sleeve pin connecting hole and the pin connecting hole on the side surface of the internal transmission structure protection shell, and the first transmission rod 105 or the second transmission rod 108 can slide along the axial direction of the guide sleeve; the two ends of the universal joint structure 106 are respectively provided with a universal joint connecting hole connected with the first transmission rod 105 or the second transmission rod 108; the two sets of universal joint structures are respectively arranged at two inflection points close to the cup clamping head, one set of universal joint structure is arranged at an inflection point position far away from the cup clamping head, one end of the universal joint structure arranged at the inflection point position far away from the cup clamping head is connected with the second transmission rod 108, and the other end of the universal joint structure is connected with the first transmission rod 105; the other set of universal joint structure is arranged at the position of an inflection point close to the clamping cup head, one end of the universal joint structure arranged at the position of the inflection point close to the clamping cup head is connected with the first transmission rod 105, and the other end of the universal joint structure is connected with the connecting port connecting column of the threaded rod interchange structure 101.
The inner diameter of the cup clamping head 102 is larger than the maximum outer diameter of the threaded rod interchange structure, so that the threaded rod interchange structure can move axially along the axis of the cup clamping head, and one end of the cup clamping head is provided with an anti-rotation flat part 1021 matched with an acetabular prosthesis.
As shown in fig. 5 to 7, the threaded rod interchange structure 101 includes an interchange threaded rod 1, a screw connector 2, steel balls 3, a connector housing 4, a spring 5 and a limiting sleeve 6, one end of the screw connector 2 is provided with a connector connection post 22, the other end of the screw connector 2 is provided with an insertion port 23, a hollow cavity 24 extending along an axial direction is arranged inside the screw connector 2, and the insertion port 23 is communicated with the hollow cavity 24; a circular groove hole 21 is formed in the side peripheral wall of the screw rod connecting port 2; the steel ball 3 is arranged in the circular groove hole; one end of the interchange threaded rod 1 is provided with a threaded rod connecting post 11, and the threaded rod connecting post 11 is inserted into the hollow cavity 24 through the insertion opening 23; the other end of the interchange threaded rod 1 is provided with a thread 13, and the interchange threaded rod 1 is detachably connected with the acetabulum prosthesis through the thread 13; an annular groove 12 is arranged on the side peripheral wall of the threaded rod connecting column 11; the connecting port shell 4 is slidably sleeved on the peripheral wall of the screw connecting port 2; the inner wall of the connector shell is provided with a conical opening structure 41; the conical opening structure 41 is abutted with the steel ball 3; a spring installation groove 42 is formed between the inner wall of the connecting port shell 4 and the outer peripheral wall of the screw connecting port 2; the spring 5 is arranged in the spring mounting groove 42 and sleeved on the outer peripheral wall of the screw connecting port 2; a table surface 43 is formed between the bottom surface of the conical opening structure 41 and the spring mounting groove 42; one end of the limiting sleeve 6 is inserted into the connector shell 4, the distance between the table surface 43 and the end surface of the end, inserted into the connector shell 4, of the limiting sleeve 6 is smaller than the free length of the spring 5, so that the spring 5 is in a compressed state, the conical opening structure 41 presses the steel ball 3 into the circular groove hole 21 by the elastic force of the spring 5, and the bottom of the steel ball 3 is in close contact with the annular groove 12, so that the interchangeable threaded rod 1 is clamped.
Preferably, the limiting sleeve 6 is sleeved on the peripheral wall of the connecting port connecting column 22, and the limiting sleeve 6 is fixedly connected with the connecting port connecting column 22 through a pin 7.
The diameter of the circular slotted hole 21 is smaller than that of the steel ball 3.
The position of the annular groove 12 is arranged corresponding to the position of the circular groove hole 21.
The connection port housing 4 is slidable in the axial direction of the screw connection port 2.
The inner diameter of the spring mounting groove 42 is larger than the outer diameter of the spring 5; the outer diameter of the limiting sleeve 6 is smaller than the inner diameter of the spring mounting groove 42, and the outer diameter of the limiting sleeve 6 is larger than the outer diameter of the spring 5.
The interchange threaded rod 1 is an M6 or M10 threaded rod.
The end of the connecting opening connecting column 22 is welded with the internal transmission structure of the acetabulum cup installer.
When the threaded rod interchange structure 101 is used, the threads 13 of the interchange threaded rod 1 are connected with the acetabular prosthesis.
If the interchange threaded rod 1 needs to be replaced, for example, the M6 threaded rod needs to be replaced by the M10 threaded rod, the connection port housing 4 only needs to be pushed towards the limiting sleeve 6, so that the connection port housing 4 further compresses the spring 5, at the moment, the tapered mouth structure 41 does not apply pressure to the steel balls 3, a large gap exists between the steel balls 3 and the annular groove 12 of the interchange threaded rod 1, and the steel balls can not be in contact with the annular groove, so that the interchange threaded rod 1 can be inserted into or pulled out of the hollow cavity 24 of the screw connection port 2, and the interchange threaded rod 1 can be replaced. After the replacement is finished, the connector shell 4 is loosened, the connector shell 4 moves towards the direction of the interchange threaded rod 1 under the action of the elastic force of the spring 5, the steel balls 3 are pressed in the circular groove holes 21 again by the conical opening structure 41, the bottoms of the steel balls 3 are in close contact with the annular groove 12, and the interchange threaded rod 1 is clamped.
When the acetabulum cup installer with the interchangeable threaded rod is used, the threaded rod M10 or M6 is selected according to the threaded hole of the acetabulum prosthesis, external force is applied to axially move the casing of the connecting port, the spring is compressed, the locking ball and the arc-shaped groove of the threaded rod (namely the annular groove 12 of the interchangeable threaded rod 1) form a gap, the threaded rod is inserted into the cavity of the threaded rod connecting port, the external force is removed, the spring rebounds, the threaded rod is clamped, the cup clamping head with the corresponding inner diameter is selected to be tightly connected with the taper of the protective shell of the.
The long transmission rod (namely the second transmission rod 108) is rotated, the threaded hole of the acetabular prosthesis is connected and screwed with the threaded rod (namely the exchange threaded rod 1) of the acetabular cup installer through internal transmission power, the control pressing plate 111 is pressed down, the internal transmission structure generates micro-deformation, the control pressing plate rotates by taking the connecting hole as the center, the connecting sleeve rotates by taking the connecting hole of the control pressing plate as the center, and the connecting sleeve are eccentrically locked after the position is appointed. The control pressure plate is connected with the installer main body, can rotate around the connecting hole and is connected with the connecting sleeve, and the connecting sleeve can rotate around the connecting hole and is connected with the long transmission rod and can slide along the long transmission rod. When the force of the connecting sleeve on the control pressure plate is always perpendicular to the long transmission rod along the rotation tangent direction of the long transmission rod during use, the stress of a connecting hole of the control pressure plate is the same as that of the connecting sleeve, when the long transmission rod rotates to a horizontal position, the connecting sleeve and the control pressure plate are only subjected to vertical tangential force, at the moment, the connecting hole of the control pressure plate connected with the installer main body is positioned under the connecting hole of the connecting sleeve (actually, a rotation point under the connecting hole is exceeded), the control pressure plate rotates around to need horizontal tangential force, but the structure can only provide vertical tangential force, when the rotation exceeds the vertical position, the long transmission rod has tangential force opposite to the rotation direction of the control pressure plate on the control pressure. The acetabulum prosthesis is fixedly connected with the cup clamping head. The acetabular cup is held by hand (namely the silica gel handle 113), the acetabular cup prosthesis is aligned with the acetabular fossa of the patient, the handle striking block (namely the striking block 114) is struck by tools such as a sliding hammer, the acetabular cup prosthesis is installed to the acetabular fossa, the control pressure plate is lifted by applying external force, the acetabular cup prosthesis is loosened (namely loosened) with the cup clamping head, the long transmission rod (namely the second transmission rod 108) is rotated in the reverse direction, and the threaded rod is screwed out of the screwed hole of the acetabular cup prosthesis, so that the operation is completed. And (4) detaching the cup clamping head, detaching the threaded rod, and sterilizing.
The foregoing describes preferred embodiments of the present invention, but is not intended to limit the invention thereto. Modifications and variations of the embodiments disclosed herein may be made by those skilled in the art without departing from the scope and spirit of the invention.
Claims (10)
1. The acetabulum cup installer with the interchangeable threaded rod is characterized by comprising a threaded rod interchange structure, a cup clamping head, a guide sleeve, an internal transmission structure protective shell, a first transmission rod, a universal joint structure, a first pin, a second transmission rod, a second pin, a connecting sleeve, a control pressure plate, a third pin and a silica gel handle, wherein the threaded rod interchange structure is in conical matching connection with the internal transmission structure protective shell through the cup clamping head; the protective shell of the internal transmission structure is of a trapezoidal structure with four inflection points, a groove for placing the internal transmission structure is formed in the top of the protective shell of the internal transmission structure, a notch with the functions of weight reduction and cleaning is formed in one side of the bottom corresponding to the top of the protective shell of the internal transmission structure, a plurality of pin connecting holes are correspondingly formed in the side surface of the protective shell of the internal transmission structure, and the first pin, the second pin and the third pin respectively penetrate through different pin connecting holes to connect the internal transmission device with the protective shell of the internal transmission structure; one end of the protective shell of the internal transmission structure is provided with a conical hole connected with the clamping cup head; the other end is provided with a threaded hole connected with the silica gel handle; one end of the silica gel handle is a striking block, the other end of the silica gel handle is a threaded rod corresponding to the protective shell of the internal transmission structure, and the threaded rod is connected with the protective shell of the internal transmission structure through a threaded hole; the guide sleeve, the first transmission rod, the universal joint structure, the second transmission rod, the connecting sleeve and the control pressure plate form an internal transmission device; one end of the control pressure plate is provided with two connecting holes connected with the connecting sleeve and the protective shell of the internal transmission structure and a connecting sleeve mounting groove penetrating through the connecting sleeve connecting holes; the control pressure plate is connected with the protective shell of the internal transmission structure at the inflection point of the handle connection side through a second pin; one end of the connecting sleeve is provided with a connecting hole corresponding to the control pressure plate, the connecting hole is connected with the control pressure plate through a pin at the mounting groove, and the control pressure plate can rotate by taking the connecting pin of the protective shell with the internal structure as an axis; the connecting sleeve rotates by taking the connecting pin of the control pressure plate as an axis; the other end of the connecting sleeve is provided with a connecting sleeve through hole, the second transmission rod penetrates through the connecting sleeve through hole and is in clearance fit with the connecting sleeve through hole, and the second transmission rod can axially slide; the guide sleeve is provided with a guide sleeve through hole which has the same size with the connecting sleeve through hole, a guide sleeve pin connecting hole is formed in the side face of the guide sleeve through hole, the first transmission rod or the second transmission rod penetrates through the guide sleeve through hole, the guide sleeve is fixedly connected with the protective shell of the internal transmission structure through the first pin, the guide sleeve pin connecting hole and the pin connecting hole in the side face of the protective shell of the internal transmission structure, and the first transmission rod or the second transmission rod can slide along the axial direction of the guide sleeve; the two ends of the universal joint structure are respectively provided with a universal joint connecting hole connected with the first transmission rod or the second transmission rod; the two sets of universal joint structures are respectively arranged at two inflection points close to the cup clamping head, one set of universal joint structure is arranged at an inflection point position far away from the cup clamping head, one end of the universal joint structure arranged at the inflection point position far away from the cup clamping head is connected with the second transmission rod, and the other end of the universal joint structure is connected with the first transmission rod; the other set of universal joint structure is arranged at the position of an inflection point close to the clamping cup head, one end of the universal joint structure arranged at the position of the inflection point close to the clamping cup head is connected with the first transmission rod, and the other end of the universal joint structure is connected with the connecting port connecting column of the threaded rod interchange structure.
2. The threaded rod interchangeable acetabular cup installer of claim 1, wherein the threaded rod interchangeable feature has an inner diameter that is larger than a maximum outer diameter of the threaded rod interchangeable feature such that the threaded rod interchangeable feature is axially movable along an axis of the cup head, the cup head having an end with an anti-rotation flat for mating with an acetabular prosthesis.
3. The threaded rod interchangeable acetabular cup installer as claimed in claim 1, wherein the threaded rod interchangeable structure comprises an interchangeable threaded rod, a threaded rod connection port, steel balls, a connection port housing, a spring and a stop collar, wherein one end of the threaded rod connection port is provided with a connection port connection post, the other end of the threaded rod connection port is provided with an insertion port, a hollow cavity extending in the axial direction is arranged inside the threaded rod connection port, and the insertion port is communicated with the hollow cavity; a circular slotted hole is formed in the side peripheral wall of the screw rod connecting port; the steel ball is arranged in the circular groove hole; one end of the interchange threaded rod is provided with a threaded rod connecting column which is inserted into the hollow cavity through the insertion hole; the other end of the interchange threaded rod is provided with a thread, and the interchange threaded rod is detachably connected with the acetabulum prosthesis through the thread; an annular groove is arranged on the side peripheral wall of the threaded rod connecting column; the connecting port shell is slidably sleeved on the peripheral wall of the screw connecting port; the inner wall of the connector shell is provided with a conical opening structure; the conical opening structure is abutted with the steel ball; a spring installation groove is formed between the inner wall of the connector shell and the outer peripheral wall of the screw connector; the spring is arranged in the spring mounting groove and sleeved on the peripheral wall of the screw rod connecting port; a table top is formed between the bottom surface of the conical opening structure and the spring mounting groove; one end of the limiting sleeve is inserted into the connector shell, the distance between the table top and the end face of the end, inserted into the connector shell, of the limiting sleeve is smaller than the free length of the spring, the spring is in a compressed state, the conical opening structure presses the steel balls into the circular groove hole through the elastic force of the spring, the bottom of the steel balls are in close contact with the annular groove, and the interchange threaded rod is clamped.
4. The threaded rod interchangeable acetabular cup installer of claim 3, wherein the stop collar is sleeved on the outer peripheral wall of the connection port connection post and the stop collar is fixedly connected to the connection port connection post by a pin.
5. The threaded rod interchangeable acetabular cup installer of claim 3, wherein the diameter of the circular slotted hole is less than the diameter of the steel ball.
6. The threaded rod interchangeable acetabular cup installer of claim 3, wherein the annular groove is positioned to correspond to the position of the circular slotted hole.
7. The threaded rod interchangeable acetabular cup installer of claim 3, wherein the port connection housing is slidable along an axial direction of the threaded rod connection port.
8. The threaded rod interchangeable acetabular cup installer of claim 3, wherein an inner diameter of the spring mounting slot is greater than an outer diameter of the spring; the outer diameter of the limiting sleeve is smaller than the inner diameter of the spring mounting groove, and the outer diameter of the limiting sleeve is larger than the outer diameter of the spring.
9. The threaded rod interchangeable acetabular cup installer of claim 3, wherein the interchangeable threaded rod is an M6 or M10 threaded rod.
10. The threaded rod interchangeable acetabular cup installer of claim 3, wherein the end of the interface connection post is welded to the internal drive feature of the acetabular cup installer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993308.6A CN112043470A (en) | 2020-09-21 | 2020-09-21 | Threaded rod interchangeable acetabular cup installer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993308.6A CN112043470A (en) | 2020-09-21 | 2020-09-21 | Threaded rod interchangeable acetabular cup installer |
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| Publication Number | Publication Date |
|---|---|
| CN112043470A true CN112043470A (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010993308.6A Pending CN112043470A (en) | 2020-09-21 | 2020-09-21 | Threaded rod interchangeable acetabular cup installer |
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| CN (1) | CN112043470A (en) |
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| US20080021481A1 (en) * | 2006-05-01 | 2008-01-24 | Precimed S.A. | Inserter for minimally invasive joint surgery having interchangeable thread |
| CN102908214A (en) * | 2012-09-21 | 2013-02-06 | 联合骨科器材股份有限公司 | Acetabular cup implanter |
| US20160135963A1 (en) * | 2014-11-19 | 2016-05-19 | Symmetry Medical, Inc. | Method of attachment of implantable cup to a cup impactor |
| CN207747317U (en) * | 2018-01-05 | 2018-08-21 | 宁波双马机械工业有限公司 | A kind of fast assembly and disassembly mechanism of injection molding machine mandril |
| CN110223571A (en) * | 2019-05-17 | 2019-09-10 | 浙江工贸职业技术学院 | A kind of solid geometry demonstration teaching aid |
| CN211381596U (en) * | 2019-08-16 | 2020-09-01 | 江苏柯润玺医疗科技发展有限公司 | Terminal component of orthopedic joint replacement surgery system |
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|---|---|---|---|---|
| US20080021481A1 (en) * | 2006-05-01 | 2008-01-24 | Precimed S.A. | Inserter for minimally invasive joint surgery having interchangeable thread |
| CN102908214A (en) * | 2012-09-21 | 2013-02-06 | 联合骨科器材股份有限公司 | Acetabular cup implanter |
| US20160135963A1 (en) * | 2014-11-19 | 2016-05-19 | Symmetry Medical, Inc. | Method of attachment of implantable cup to a cup impactor |
| CN207747317U (en) * | 2018-01-05 | 2018-08-21 | 宁波双马机械工业有限公司 | A kind of fast assembly and disassembly mechanism of injection molding machine mandril |
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