CN113017932A - Buffer structure and false body assembly - Google Patents
Buffer structure and false body assembly Download PDFInfo
- Publication number
- CN113017932A CN113017932A CN201911252220.2A CN201911252220A CN113017932A CN 113017932 A CN113017932 A CN 113017932A CN 201911252220 A CN201911252220 A CN 201911252220A CN 113017932 A CN113017932 A CN 113017932A
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- buffer
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- shell
- rotating shaft
- buffer body
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- 239000000872 buffer Substances 0.000 title claims abstract description 154
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims description 65
- 230000005540 biological transmission Effects 0.000 claims description 64
- 230000003139 buffering effect Effects 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 210000000629 knee joint Anatomy 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 4
- 230000009191 jumping Effects 0.000 abstract description 3
- 201000008968 osteosarcoma Diseases 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000013016 damping Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 230000033001 locomotion Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 210000003414 extremity Anatomy 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 210000002303 tibia Anatomy 0.000 description 3
- 210000000689 upper leg Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000000366 juvenile effect Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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Classifications
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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
- A61F2/38—Joints for elbows or knees
- A61F2/3836—Special connection between upper and lower leg, e.g. constrained
-
- 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
- A61F2/38—Joints for elbows or knees
- A61F2/3859—Femoral components
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vibration Dampers (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a buffer structure and a prosthesis component, wherein the prosthesis component comprises a prosthesis, a rotating shaft, a bone hinge base and the buffer structure, the prosthesis, the rotating shaft and the bone hinge base can be used for replacing the knee joint of a patient with malignant osteosarcoma after being assembled, and the buffer structure is arranged on the rotating shaft, so that the impact damage to the prosthesis caused by impact force generated in the action processes of walking, running, jumping and the like of the patient can be relieved or even completely avoided.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a buffer structure and a prosthesis assembly.
Background
With the development of medical technology, limb protection treatment is adopted for most of distal-femoral and proximal-tibial osteosarcomas with high incidence, and the limb protection treatment refers to a treatment method of installing a prosthesis in a body after a tumor is removed through surgery to replace a knee joint part.
However, the prosthesis is placed in the body of the patient for a long time, and the knee joint is subjected to instant impact force by the actions of walking, jumping and the like of the patient in daily life, which causes great damage to the prosthesis. Analyzing various clinical data of prosthesis application can find that complications such as rigidity damage, failure, looseness and the like of the prosthesis are always common problems, wherein the poor damping effect of the prosthesis is an important reason for the damage of the prosthesis because the prosthesis in the prior art is in rigid load bearing.
Disclosure of Invention
The invention aims to provide a buffer structure and a prosthesis assembly so as to relieve the damage of impact force generated by walking, running, jumping and the like of a patient to the prosthesis.
To achieve the above object, an embodiment of the present invention provides a buffer structure for a prosthesis assembly, including:
the first shell and the second shell are coaxially arranged, the first shell and the second shell are of hollow structures, a working cavity is formed between the first shell and the second shell, and the second shell is arranged in the first shell and is provided with an opening extending along a first direction;
the supporting force transmission mechanism is arranged in the working cavity and connected with the first shell, and the supporting force transmission mechanism is positioned at the opening and defines an accommodating cavity with the second shell; and the number of the first and second groups,
the buffer body is arranged in the working cavity and is connected with the supporting force transmission mechanism;
the accommodating cavity is used for accommodating a rotating shaft extending along a first direction, and the supporting force transmission mechanism is configured to transmit an acting force to the buffer body when the rotating shaft applies the acting force to the supporting force transmission mechanism and the acting force is directed to the first shell, so that the buffer body deforms to absorb the acting force.
Optionally, the supporting force transfer mechanism comprises:
the fixed table is arranged at the opening and used for supporting the rotating shaft;
the force transmission part comprises a connecting rod assembly and a push rod, two ends of the connecting rod assembly are respectively hinged with the fixed platform and the first shell, and two ends of the push rod are respectively connected with the connecting rod assembly and the buffer body;
when the rotating shaft applies a force to the fixed platform and the force is directed to the first shell, the supporting part can be compressed, so that the connecting rod assembly is driven to move the push rod to the buffer body.
Optionally, the supporting force transmission mechanism further comprises a supporting portion elastically connecting the fixing table and the first housing;
when the rotating shaft applies acting force to the fixed table, the supporting part deforms; when the rotating shaft removes the acting force on the fixed table, the supporting part restores the shape, and acts on the fixed table to restore the fixed table to the initial position.
Optionally, the connecting rod assembly includes a first connecting rod and a second connecting rod, the fixed station, the first connecting rod, the second connecting rod and the first housing are sequentially hinged, and the push rod is connected to a hinge point of the first connecting rod and the second connecting rod.
Optionally, the supporting force transfer mechanism comprises:
the fixed table is arranged at the opening and used for supporting the rotating shaft;
the mounting table is arranged on the first shell opposite to the opening;
the force transmission part comprises a connecting rod assembly and a push rod, two ends of the connecting rod assembly are respectively hinged with the fixing table and the mounting table, and two ends of the push rod are respectively connected with the connecting rod assembly and the buffer body;
when the rotating shaft applies force to the fixed table, the connecting rod assembly is driven to enable the push rod to move towards the buffer body.
Optionally, an arc-shaped limiting piece is arranged on the surface of the fixed table facing the accommodating cavity, the radian of the limiting piece is between 60 degrees and 120 degrees, and the rotating shaft is in contact with the limiting piece.
Optionally, the supporting force transmission mechanism further includes a slide rail, the slide rail extends along a second direction and is disposed at the opening of the second housing, and the second direction is perpendicular to the first direction; the limiting piece is connected with the sliding rail, and when the rotating shaft applies acting force pointing to the first shell to the fixing table, the fixing table moves towards the first shell along the sliding rail so that the supporting part is compressed.
Optionally, the buffer body includes a first sub-buffer body, the first sub-buffer body is along the first lateral wall, connecting portion and the second lateral wall that the circumference of working chamber connects gradually, first lateral wall with the second lateral wall is the rigid wall, and respectively with support power transmission mechanism connects, connecting portion are flexible structure, work as support power transmission mechanism will the effort transmits to when the buffer body, connecting portion produce the deformation and absorb the effort.
Optionally, the buffer body includes at least two first sub-buffer bodies, and each first sub-buffer body all includes along first lateral wall, connecting portion and the second lateral wall that the circumference of working chamber connects gradually, first lateral wall with the second lateral wall is the rigidity wall, connecting portion are flexible structure, and mutual contact between two adjacent first sub-buffer bodies, the first lateral wall of two sub-buffer bodies that are located the edge respectively with support power transmission mechanism is connected, works as support power transmission mechanism with the effort is transmitted to when first sub-buffer body, connecting portion produce the deformation and absorb the effort.
Optionally, the buffer body includes two first sub-buffer bodies, each first sub-buffer body includes a first side wall, a connecting portion, and a second side wall, which are sequentially connected along the circumferential direction of the working cavity, the first side wall and the second side wall are both rigid walls, and the connecting portion is a flexible structure; the first side wall of each first sub-buffer body is connected with the supporting force transmission mechanism, and the second side walls of the two first sub-buffer bodies are connected with each other; when the supporting force transmission mechanism transmits the acting force to the first sub buffer body, the connecting part deforms to absorb the acting force.
Optionally, the connecting portion includes a third sidewall, and the first sidewall, the second sidewall and the third sidewall enclose a closed space with variable size, and the closed space is used for containing a compressible fluid.
Optionally, the buffer body further includes a second sub-buffer body, the two first sub-buffer bodies are connected through the second sub-buffer body, and when the acting force is transmitted to the second sub-buffer body, the second sub-buffer body can deform to absorb the acting force.
Optionally, the second sub-buffer body is a compression spring.
Optionally, the buffer body further includes a limiting sleeve, the limiting sleeve has a limiting channel, the second sub-buffer body is disposed in the limiting channel, and the limiting channel is used for constraining the second sub-buffer body to deform in a connection direction of the two first sub-buffer bodies.
Optionally, the radial cross-section of the second housing is a portion of the circumference of an ellipse, and the opening is disposed parallel to the major axis of the ellipse.
In order to achieve the above object, the present invention further provides a prosthesis assembly, including a prosthesis, a bone hinge base, a rotation shaft, and the buffering structure; the rotating shaft is used for connecting the prosthesis and the bone hinge base, the rotating shaft penetrates through the accommodating cavity of the buffer structure, and the first shell is connected with the prosthesis.
Optionally, the prosthesis is an extendable prosthesis.
Compared with the prior art, the buffer structure and the prosthesis component have the following advantages:
the prosthesis component comprises a prosthesis, a bone hinge base, a rotating shaft and a buffering structure, wherein the rotating shaft is used for connecting the prosthesis and the bone hinge base, the buffering structure is connected with the prosthesis, the buffering structure comprises a first shell, a second shell, a supporting force transmission mechanism and a buffering body, the second shell and the first shell are coaxially arranged, a working cavity is formed between the second shell and the first shell, the second shell is further provided with an opening extending along an axis, the supporting force transmission mechanism is arranged in the working cavity and located at the opening, and therefore the supporting force transmission mechanism and the second shell jointly enclose a containing cavity to be sleeved on the rotating shaft; when the rotating shaft applies an acting force to the supporting force transmission mechanism and the acting force is directed to the first shell, the supporting force transmission mechanism can be compressed and can transmit the acting force to the buffer body, so that the buffer body is deformed to absorb the acting force, and the damage of the acting force to the prosthesis is relieved.
Drawings
FIG. 1 is a schematic illustration of a prosthesis assembly provided in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the prosthesis in the prosthesis assembly shown in FIG. 1;
FIG. 3 is a schematic diagram of a buffer structure provided in accordance with an embodiment of the present invention;
fig. 4 is a schematic view of a force transfer mechanism supporting the cushioning structure described in fig. 3.
In the figure:
1000-a prosthesis;
1100-a housing;
1200-an extension piece;
1210-brim structure;
1300-a limiter;
1400 power mechanism;
2000-bone hinge base;
3000-rotating shaft;
4000-a buffer structure;
4100-first housing;
4110-mounting table;
4200-a second housing;
4300-supporting force transmission mechanism;
4310-fixed table;
4311-limit piece;
4320-a support;
4330-force transmission part;
4331-link assembly, 4331 a-first link, 4331 b-second link;
4332-push rod;
4340-sliding rail;
4400-buffer;
4410-a first buffer;
4411-first sidewall, 4412-second sidewall, 4413-junction, 4414-third sidewall, 4415-compressed fluid;
4420-a second buffer;
4430-a stop collar.
Detailed Description
To make the objects, advantages and features of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents, and the plural "includes" two "or" more than three "referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The same or similar reference numbers in the drawings identify the same or similar elements.
An object of an embodiment of the present invention is to provide a cushioning structure and a prosthesis assembly. The prosthetic component is, for example, a prosthetic component for replacing a knee joint. As shown in fig. 1, the prosthesis assembly includes a prosthesis 1000, a bone hinge base 2000, a rotation shaft 3000 and a buffer structure 4000, wherein the rotation shaft 3000 is used for connecting the prosthesis 1000 and the bone hinge base 2000, so that the prosthesis 1000 and the bone hinge base 2000 can rotate around the rotation shaft 3000, and therefore, when the prosthesis assembly replaces the knee joint, the patient can perform a knee bending movement. Buffer structure 4000 cover is established pivot 3000 go up and with prosthesis 1000 is connected, and the impact force that the patient produced when advancing to walk, run, jump etc. passes through pivot 3000 transmits to buffer structure 4000, buffer structure 4000 can absorb by a wide margin, even completely the impact force to slow down the impact force is to the damage that prosthesis 1000 caused.
In this embodiment, the prosthesis 1000 is preferably an extendable prosthesis, which is mainly used for juvenile and children patients with malignant osteosarcoma, so that the prosthesis 1000 can be extended correspondingly with the development of the body of the patient, thereby avoiding the situation of unequal lengths of the limbs of the prosthesis.
Fig. 2 shows a cross-sectional view of the prosthesis 1000 in the prosthesis assembly, and as shown in fig. 1 and 2, the prosthesis 1000 may include a housing 1100, an extension 1200, a retaining member 1300, and a power mechanism 1400. The housing 1100 may be a hollow cylinder and have first and second opposite ends, and the first end of the housing 1100 is connected to the bone hinge base 2000 through the rotation shaft 3000. The extension 1200 is disposed within the housing 1100 and configured to remain circumferentially stationary relative to the housing 1100 while one end of the extension 1200 extends out of the housing 1100 from a second end of the housing 1100. The limiting member 1300 is accommodated between the housing 1100 and the extension member 1200, and is configured to be at least axially stationary relative to the housing 1100, and the limiting member 1300 is used for axially limiting the extension member 1200 under a predetermined condition. The power mechanism 1400 may be a spring, two ends of the spring are respectively connected to the first end of the housing 1100 and the limiting member 1300, and when the prosthesis 1000 is in the predetermined condition, the spring is in a compressed state, and when the predetermined condition is released, the limiting member 1300 does not limit the extension member 1200 any more, so that the spring can push the extension member 1200 to move in a direction away from the first end of the housing 1100, thereby extending the prosthesis 1000.
Alternatively, the stopper 1300 is made of a resin, which may be specifically a polyacetal resin. At least one visor structure 1210 may be disposed in a circumferential direction of the extension 1200, and the visor structure 1210 extends toward the stopper 1300. Under the predetermined condition, the friction between the visor structure 1210 and the retainer 1300 is sufficient to keep the extension 1200 axially stationary, and when the predetermined condition is removed, the extension 1200 is heated, for example, by an electromagnetic field, to heat the visor structure 1210 and soften the retainer 1300 in contact with the visor structure 1210, such that the friction between the visor structure 1210 and the retainer 1300 is reduced, allowing the extension 1200 to move along the retainer 1300. In fact, the structure of the prosthesis 1000 and its working principle are common knowledge to the skilled person.
After the prosthetic assembly is implanted in the patient, the extension 1200 of the prosthesis 1000 can be used to replace the distal femur and the bone hinge base 2000 can be used to replace the proximal tibia; alternatively, the extension 1200 of the prosthesis 1000 may be used to replace the proximal tibia, while the bone hinge base 2000 is used to replace the distal femur. The cushioning structure 4000 acts like a meniscus in a natural knee joint to cushion the patient's forces during motion to protect the prosthesis 1000.
A preferred structure of the buffer structure 4000 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 3, the buffering structure 4000 includes a first housing 4100, a second housing 4200, a supporting force transmission mechanism 4300, and a buffering body 4400. The first housing 4100 and the second housing 4200 are coaxially disposed, and form a working chamber therebetween, and the second housing 4200 is disposed in the first housing 4100 and has an opening extending along a first direction, which is a direction parallel to the axes of the first housing 4100 and the second housing 4200. The support force transmission mechanism 4300 is disposed in the working chamber and connected to the first housing 4100, and the support force transmission mechanism 4300 is located at the opening to define a receiving chamber together with the second housing 4100. The buffer body 4400 is arranged in the working cavity and is connected with the supporting force transmission mechanism 4300.
The accommodating cavity is used for accommodating the rotating shaft 3000. The support force transmission mechanism 4300 is configured such that when the rotating shaft 3000 applies a force F to the support force transmission mechanism 4300, the support force transmission mechanism 4300 transmits the force to the buffer 4400, so as to deform the buffer 4400 and absorb the force.
Preferably, the radial cross-section of the second housing 4200 is a portion of an elliptical circumference. Generally, the cross-section is greater than 1/2 elliptical circumferences, e.g., the cross-section is 2/3 elliptical circumference, or 3/4 elliptical circumference, etc. Thus, the second housing 4200 is a portion of a hollow elliptical cylinder.
In addition, when the buffer structure 4000, the prosthesis 1000, the bone hinge base 2000 and the rotating shaft 3000 are assembled, it is preferable that the supporting force transmission mechanism 4300 of the buffer structure 4000 is disposed close to the prosthesis 1000, that is, the supporting force transmission mechanism 4300 is located between the rotating shaft 3000 and the prosthesis 1000.
Alternatively, the openings may be parallel to the major axis of the ellipse as viewed in a radial cross-section of the buffer structure 4000. The first housing 4100 in this embodiment may have a cylindrical structure, an elliptic cylindrical structure, or another cylindrical structure, which is not limited in this embodiment, and for convenience of understanding, the buffer structure 4000 will be described below by taking the cylindrical first housing 4100 as an example.
As shown in fig. 3, preferably, the supporting force transmission mechanism 4300 and the buffering body 4400 may be disposed in the working chamber along the circumferential direction of the first housing 4100, such that the buffering body 4400 may be located on both sides of the supporting force transmission mechanism 4300 and connected to the supporting force transmission mechanism 4300, so that the supporting force transmission mechanism 4300 transmits the acting force to the buffering body 4400 from two directions, and the buffering body 4400 may uniformly absorb the acting force.
Referring to fig. 3 in combination with fig. 4, the supporting force transmission mechanism 4300 may optionally include a fixing table 4310, a supporting portion 4320, and a force transmission portion 4330. The fixing table 4310 is disposed at the opening, and is used for supporting the rotating shaft, and forms the accommodating cavity together with the second housing 4200, and the rotating shaft 3000 contacts with the fixing table 4310. Both ends of the support portion 4320 are connected to the fixing table 4310 and the first housing 4100, respectively.
Specifically, in this embodiment, a mounting block 4110 may be disposed at a position where the first housing 4100 faces the opening, and a surface of the mounting block 4110 facing away from the first housing 4100 may be a plane. The support portion 4320 is connected to the first housing 4100 through the mounting table 4110. In one embodiment, the force transmission portion 4330 may include a connecting rod assembly 4331 and a push rod 4332, wherein two ends of the connecting rod assembly 4331 are respectively connected to the fixing table 4310 and the mounting table 4110, and two ends of the push rod are respectively connected to the connecting rod assembly 4331 and the buffer body 4400.
When the rotating shaft 3000 applies the acting force F to the fixed table 4310, the fixed table 4310 moves in a radial direction toward the first housing 4100 to compress the supporting portion 4320, such that the connecting rod assembly 4331 deforms, such that the push rod 4332 moves toward the buffer body 4400, and the acting force is transmitted to the buffer body 4400, such that the buffer body 4400 deforms to absorb the acting force.
Specifically, the number of the link assemblies 4331 is two, two link assemblies 4331 are arranged along the circumference of the first housing 4100, and each link assembly 4331 includes a first link 4331a and a second link 4331b, and the fixing table 4310, the first link 4331a, the second link 4331b, and the mounting table 4110 are hinged in sequence, so that the two link assemblies 4331, the fixing table 4310, and the mounting table 4110 constitute a six-link mechanism. The number of the push rods 4332 is also two, one end of each push rod 4332 is connected to a hinge point of the first link 4331a and the second link 4331b, and the other end is connected to the buffer 4400. Thus, when the supporting portion 4320 is compressed, the two push rods 4332 move away from each other and toward the buffer body 4400 respectively to transmit the acting force to the buffer body 4400 and deform the buffer body 4400.
And the surface of the fixed table 4310 facing the accommodating cavity is provided with an arc-shaped limiting sheet 4311, the radian of the limiting sheet 4311 can be between 60 and 120 degrees, and the arc-shaped limiting sheet 4311 is formed on the fixed table 4310, so that the rotating shaft 3000 can be tightly attached to the fixed table. In order to better accommodate the angle of the femur and tibia during movement after implantation of the prosthetic assembly in the body, the arc is preferably 90 °.
Further, the supporting force transmission mechanism 4300 further includes a sliding rail 4340, the sliding rail 4340 extends along a second direction and is disposed at the opening, the second direction is perpendicular to the axial direction (for example, the second direction is a vertical direction, taking the orientation shown in fig. 3 as an example), and the limiting piece 4311 is connected to the sliding rail 4340 and can slide along the sliding rail 4340. When the rotating shaft 3000 applies a force F to the fixed stage 4310, the fixed stage 4310 moves along the sliding rail 4340 toward the first housing 4100.
In addition, in the present embodiment, the supporting portion 4320 may be an elastic body, which includes, but is not limited to, a spring. In other embodiments, the supporting portion 4320 may also be two magnetic structures disposed in a repulsive manner, and the repulsive force between the two magnetic structures can support the fixed table 4310 and the rotating shaft 3000.
It is understood that, in one implementation manner of the supporting force transmission mechanism 4300 contemplated by the present invention, in other embodiments, the supporting force transmission mechanism 4300 may further include only a fixing table 4310 and a force transmission portion 4330, where the fixing table 4310 is disposed at the opening to support the rotating shaft 3000, the force transmission portion 4330 includes a connecting rod assembly 4331 and a push rod 4332, two ends of the connecting rod assembly 4331 are respectively hinged to the fixing table 4310 and the first housing 4100, and two ends of the push rod 4331 are respectively connected to the connecting rod assembly 4331 and the buffer 4400. When the rotating shaft 3000 applies a force to the fixed table 4310 and the force is directed to the first housing 4100, the supporting portion 4320 can be compressed, so that the connecting rod assembly 4331 is compressed to drive the push rod 4332 to move toward the buffer 4400.
In this embodiment, the buffer 4400 deforms to absorb the acting force when receiving the acting force transmitted by the supporting force transmission mechanism 4300.
An alternative configuration of the buffer 4400 in one exemplary embodiment is shown in fig. 3. As shown in fig. 3, the buffer body 4400 may include two first sub-buffer bodies 4410, and each of the first sub-buffer bodies 4410 includes a first sidewall 4411, a connecting portion 4413, and a second sidewall 4412 which are sequentially connected in a circumferential direction of the working chamber. The first and second side walls 4411 and 4412 are rigid walls, and the connecting portion 4412 includes a variable-sized sealed space for containing a compressible fluid. The first side wall 4411 of each first sub-damping body 4410 is connected to the supporting force transmission mechanism 4300, in particular to the push rod 4332 of the supporting force transmission mechanism 4300, while the second side walls 4412 of the two first sub-damping bodies 4410 are connected to each other; the connection portion 4413 is a flexible structure. Optionally, the two first sub-buffering bodies 4410 are symmetrically disposed in the working chamber. Here, the "rigid wall" refers to a side wall having a high hardness and not being deformed, and the "flexible structure" refers to a structure having a low hardness and a high flexibility and being deformed when an external force is applied thereto, and particularly, the connection portion may be made of elastomer rubber (TPU). As such, when the two first sub-absorbers 4410 receive the acting force, the two first sub-absorbers 4410 may be compressed and deformed in the circumferential direction of the first housing 4100 to absorb the acting force. It should be understood that in this embodiment, the term "first side wall" is a rigid wall of the first sub damping body circumferentially closer to the supporting force transmission mechanism, and the term "second side wall" refers to a rigid wall of the first sub damping body circumferentially farther from the supporting force transmission mechanism.
Optionally, the connecting portion 4413 includes a third sidewall 4414, and the third sidewall 4413 is connected to the first sidewall 4411 and the second sidewall 4412 in sequence to form a sealed space with variable size, the sealed space is filled with a compressed fluid 4415 with a buffering effect, and the compressed fluid 4415 may be a gas or a liquid to buffer the acting force by using the compressibility of the gas or the liquid.
Since the pressure of the gas is not easy to control when the gas is applied, it is preferable to fill the inner cavity with liquid, and generally, the liquid is selected to have certain viscosity, so that the friction force generated by the fluid layer of the fluid particles of the viscous liquid due to relative movement can be utilized to avoid the disordered flow of the liquid, and the buffer effect can be further achieved. Specifically, the liquid may be high-viscosity silicone oil, and the viscosity of the high-viscosity silicone oil at 25 ℃ is between 100 ten thousand Cs and 500 ten thousand Cs, which can completely meet the requirements of the present embodiment. Of course, in some embodiments, other liquids with a relatively high viscosity may be filled in the inner cavity.
Further, with reference to fig. 3, the buffer 4400 may further include a second sub-buffer 4420, and the second buffer 4420 is disposed between the second sidewalls 4412 of the two first sub-buffers 4410 and is simultaneously connected to the two second sidewalls 4412 (i.e., the two second sidewalls 4412 are connected through the second sub-buffer 4420). When the acting force is large and the two first sub-buffer 4410 are not enough to completely absorb the acting force, the two first sub-buffer 4410 continue to transmit the acting force to the second sub-buffer 4420 from two directions and are further buffered by the second sub-buffer 4420. Generally, the second sub-cushion 4420 may be an elastic body including, but not limited to, a compression spring. When the force is transmitted to the second sub-buffer 4420, the second sub-buffer 4420 is compressively deformed to absorb the force under the compression of the two first sub-buffers 4410.
Optionally, the buffer body 4400 further includes a limiting sleeve 4430, the limiting sleeve 4430 has a limiting channel, and the second sub-buffer body 4420 is disposed in the limiting channel, and the limiting channel extends along the circumferential direction of the first housing 4100 (i.e. the connection direction of the two first sub-buffer bodies 4410), so that when the two first sub-buffer bodies 4410 transmit acting force to the second sub-buffer body 4420, the second sub-buffer body 4420 is compressed along the circumferential direction to play a buffering role to the maximum.
The operation principle of the buffer structure 4000 in the present embodiment will be described below.
When the rotating shaft 3000 receives a force F, the rotating shaft 3000 transmits the force F to the damping device 4000. As shown in fig. 3, the fixing table 4310 moves toward the first housing 4100 while pressing the support portion 4320 and the link assembly 4331 by the action force, the support portion 4320 and the link assembly 4331 are compressed in a radial direction, so that the two push rods 4332 move away from each other in a circumferential direction toward the first sub damping body 4410 to press the first sub damping body 4410, and the two first sub damping bodies 4410 are deformed to absorb the action force. At this time, if the acting force F is small, the two first sub-absorbers 4410 can completely absorb the acting force generated by the acting force F; if the acting force is large and the two first sub-buffer bodies 4410 are not enough to completely buffer the buffer, the two first sub-buffer bodies 4410 continue to transmit the acting force to the second sub-buffer body 4420, and the second sub-buffer body 4420 deforms to further buffer.
Through the above force transmission process, the acting force is buffered at least by the first sub-buffer 4410, so that the acting force does not impact the prosthesis 1000, or the impact of the acting force on the prosthesis 1000 is greatly reduced, thereby avoiding or alleviating damage to the prosthesis 1000.
Of course, after the acting force F applied to the rotating shaft 3000 is removed, the supporting portion 4320 and thus the buffer body 4400 can be restored to the original state.
It is understood that the buffer 4400 has two first sub-buffers 4410 and one second sub-buffer 4420 as an example, but the buffer 4400 is not limited thereto in other embodiments. For example, in one embodiment, the buffer body includes only one first sub-buffer body, and the first side wall and the second side wall of one sub-buffer body are respectively used for connecting with two push rods (not shown) of the supporting force transmission mechanism. For another example, in an embodiment, the buffer body includes two first sub buffer bodies, the two first sub buffer bodies are arranged along a circumferential direction of the working chamber, second side walls of the two first sub buffer bodies contact with each other, and first side walls of the two first sub buffer bodies are respectively connected to two push rods (not shown) supporting the force transmission mechanism. Of course, the number of the first sub-buffer bodies may be more, such as three, four, etc.
Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (17)
1. A cushioning structure for a prosthetic component, comprising:
the first shell and the second shell are coaxially arranged, the first shell and the second shell are of hollow structures, a working cavity is formed between the first shell and the second shell, and the second shell is arranged in the first shell and is provided with an opening extending along a first direction;
the supporting force transmission mechanism is arranged in the working cavity and connected with the first shell, and the supporting force transmission mechanism is positioned at the opening and defines an accommodating cavity with the second shell; and the number of the first and second groups,
the buffer body is arranged in the working cavity and is connected with the supporting force transmission mechanism;
the accommodating cavity is used for accommodating a rotating shaft extending along a first direction, and the supporting force transmission mechanism is configured to transmit an acting force to the buffer body when the rotating shaft applies the acting force to the supporting force transmission mechanism and the acting force is directed to the first shell, so that the buffer body deforms to absorb the acting force.
2. The cushioning structure of claim 1, wherein the supporting force transfer mechanism comprises:
the fixed table is arranged at the opening and used for supporting the rotating shaft;
the force transmission part comprises a connecting rod assembly and a push rod, two ends of the connecting rod assembly are respectively hinged with the fixed platform and the first shell, and two ends of the push rod are respectively connected with the connecting rod assembly and the buffer body;
when the rotating shaft applies a force to the fixed platform and the force is directed to the first shell, the supporting part can be compressed, so that the connecting rod assembly is driven to move the push rod to the buffer body.
3. The cushioning structure of claim 2, wherein the supporting force transfer mechanism further comprises a support portion elastically connecting the fixed stage and the first housing;
when the rotating shaft applies acting force to the fixed table, the supporting part deforms; when the rotating shaft removes the acting force on the fixed table, the supporting part restores the shape, and acts on the fixed table to restore the fixed table to the initial position.
4. The buffering structure as claimed in claim 2, wherein the link assembly comprises a first link and a second link, the fixed platform, the first link, the second link and the first housing are sequentially hinged, and the push rod is connected to a hinge point of the first link and the second link.
5. The cushioning structure of claim 1, wherein the supporting force transfer mechanism comprises:
the fixed table is arranged at the opening and used for supporting the rotating shaft;
the mounting table is arranged on the first shell opposite to the opening; and the number of the first and second groups,
the force transmission part comprises a connecting rod assembly and a push rod, two ends of the connecting rod assembly are respectively hinged with the fixing table and the mounting table, and two ends of the push rod are respectively connected with the connecting rod assembly and the buffer body;
wherein when the rotating shaft applies a force to the fixed table, and the link assembly is driven to move the push rod toward the buffer body.
6. The buffer structure according to claim 2 or 5, wherein an arc-shaped limiting piece is arranged on the surface of the fixing table facing the accommodating cavity, the radian of the limiting piece is between 60 and 120 degrees, and the rotating shaft is in contact with the limiting piece.
7. The cushioning structure of claim 6, wherein the supporting force transfer mechanism further comprises a sliding track extending in a second direction and disposed at the opening of the second housing, and the second direction is perpendicular to the first direction; the limiting piece is connected with the sliding rail, and when the rotating shaft applies acting force pointing to the first shell to the fixing table, the fixing table moves towards the first shell along the sliding rail so that the supporting part is compressed.
8. The buffer structure according to claim 1, wherein the buffer body comprises a first sub-buffer body, the first sub-buffer body comprises a first side wall, a connecting portion and a second side wall, the first side wall, the connecting portion and the second side wall are sequentially connected in the circumferential direction of the working cavity, the first side wall and the second side wall are both rigid walls and are respectively connected with the supporting force transmission mechanism, the connecting portion is a flexible structure, and when the supporting force transmission mechanism transmits the acting force to the buffer body, the connecting portion deforms to absorb the acting force.
9. The buffer structure according to claim 1, wherein the buffer body comprises at least two first sub-buffer bodies, each first sub-buffer body comprises a first side wall, a connecting portion and a second side wall sequentially connected in the circumferential direction of the working cavity, the first side wall and the second side wall are rigid walls, the connecting portion is a flexible structure, two adjacent first sub-buffer bodies are in contact with each other, the first side walls of the two sub-buffer bodies located at the edge are respectively connected with the supporting force transmission mechanism, and when the supporting force transmission mechanism transmits the acting force to the first sub-buffer bodies, the connecting portion deforms to absorb the acting force.
10. The buffer structure according to claim 1, wherein the buffer body comprises two first sub-buffer bodies, each first sub-buffer body comprises a first side wall, a connecting part and a second side wall which are sequentially connected along the circumferential direction of the working cavity, the first side wall and the second side wall are both rigid walls, and the connecting part is a flexible structure; the first side wall of each first sub-buffer body is connected with the supporting force transmission mechanism, and the second side walls of the two first sub-buffer bodies are connected with each other; when the supporting force transmission mechanism transmits the acting force to the first sub buffer body, the connecting part deforms to absorb the acting force.
11. The cushioning structure of any of claims 8-9, wherein the connecting portion comprises a third sidewall, the first sidewall, the second sidewall, and the third sidewall enclosing a variable-sized enclosed space for containing a compressible fluid.
12. The cushioning structure of claim 9, wherein the cushioning body further comprises a second sub-cushioning body, the two first sub-cushioning bodies being connected by the second sub-cushioning body, the second sub-cushioning body being capable of deforming to absorb the force when the force is transmitted to the second sub-cushioning body.
13. The cushioning structure of claim 12, wherein the second sub-cushioning body is a compression spring.
14. The buffer structure according to claim 13, wherein the buffer body further comprises a limiting sleeve, the limiting sleeve has a limiting channel, the second sub-buffer body is disposed in the limiting channel, and the limiting channel is configured to restrict the second sub-buffer body from deforming in a connecting direction of the two first sub-buffer bodies.
15. The cushioning structure of claim 1, wherein the radial cross-section of the second shell is a portion of the circumference of an ellipse and the opening is disposed parallel to the major axis of the ellipse.
16. A prosthesis assembly comprising a prosthesis, a bone hinge base, a shaft, and a cushioning structure of any one of claims 1-15; the rotating shaft is used for connecting the prosthesis and the bone hinge base, the rotating shaft penetrates through the accommodating cavity of the buffer structure, and the first shell is connected with the prosthesis.
17. A prosthesis component as claimed in claim 16, wherein the prosthesis is an extendable prosthesis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252220.2A CN113017932B (en) | 2019-12-09 | 2019-12-09 | Buffer structure and prosthesis assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252220.2A CN113017932B (en) | 2019-12-09 | 2019-12-09 | Buffer structure and prosthesis assembly |
Publications (2)
| Publication Number | Publication Date |
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| CN113017932A true CN113017932A (en) | 2021-06-25 |
| CN113017932B CN113017932B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911252220.2A Active CN113017932B (en) | 2019-12-09 | 2019-12-09 | Buffer structure and prosthesis assembly |
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| Country | Link |
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| CN (1) | CN113017932B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116672133A (en) * | 2023-03-01 | 2023-09-01 | 北京和华瑞博医疗科技有限公司 | Acetabular prosthesis installation damping device, prosthesis installation actuator and operation system |
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| US4932806A (en) * | 1989-03-21 | 1990-06-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Compliant joint |
| DE10029859A1 (en) * | 2000-06-16 | 2001-09-13 | Karl Engels | Prosthesis shaft, especially for hip prosthesis; has sleeve and core, with elastic, rubber, deformable material forming buffer mass in hollow space between sleeve and core |
| EP1159936A2 (en) * | 2000-05-27 | 2001-12-05 | Heggemann GmbH | Damper for rotating movements of prothesis |
| US20020143402A1 (en) * | 1995-09-04 | 2002-10-03 | Limber Ltd. | Hip joint prostheses |
| CN103429928A (en) * | 2011-01-13 | 2013-12-04 | 沃科夏轴承公司 | Damper having modular flexible ligaments and variable gaps |
| CN105434086A (en) * | 2016-02-01 | 2016-03-30 | 中南大学湘雅医院 | Wrist joint implant body |
| US20170074316A1 (en) * | 2014-03-03 | 2017-03-16 | Sug-Whan Kim | Joint apparatus, and training device, ring type joint structure, construction toy, and artificial joint using same |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655778A (en) * | 1985-08-12 | 1987-04-07 | Harrington Arthritis Research Center | Joint prosthesis |
| US4932806A (en) * | 1989-03-21 | 1990-06-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Compliant joint |
| US20020143402A1 (en) * | 1995-09-04 | 2002-10-03 | Limber Ltd. | Hip joint prostheses |
| EP1159936A2 (en) * | 2000-05-27 | 2001-12-05 | Heggemann GmbH | Damper for rotating movements of prothesis |
| DE10029859A1 (en) * | 2000-06-16 | 2001-09-13 | Karl Engels | Prosthesis shaft, especially for hip prosthesis; has sleeve and core, with elastic, rubber, deformable material forming buffer mass in hollow space between sleeve and core |
| CN103429928A (en) * | 2011-01-13 | 2013-12-04 | 沃科夏轴承公司 | Damper having modular flexible ligaments and variable gaps |
| US20170074316A1 (en) * | 2014-03-03 | 2017-03-16 | Sug-Whan Kim | Joint apparatus, and training device, ring type joint structure, construction toy, and artificial joint using same |
| CN105434086A (en) * | 2016-02-01 | 2016-03-30 | 中南大学湘雅医院 | Wrist joint implant body |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116672133A (en) * | 2023-03-01 | 2023-09-01 | 北京和华瑞博医疗科技有限公司 | Acetabular prosthesis installation damping device, prosthesis installation actuator and operation system |
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| Publication number | Publication date |
|---|---|
| CN113017932B (en) | 2024-02-20 |
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