CN113017932B - Buffer structure and prosthesis assembly - Google Patents
Buffer structure and prosthesis assembly Download PDFInfo
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- CN113017932B CN113017932B CN201911252220.2A CN201911252220A CN113017932B CN 113017932 B CN113017932 B CN 113017932B CN 201911252220 A CN201911252220 A CN 201911252220A CN 113017932 B CN113017932 B CN 113017932B
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- 239000000872 buffer Substances 0.000 title claims description 132
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 15
- 230000003139 buffering effect Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 66
- 230000005540 biological transmission Effects 0.000 claims description 60
- 239000012530 fluid Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 210000000629 knee joint Anatomy 0.000 abstract description 5
- 230000009191 jumping Effects 0.000 abstract description 3
- 201000008968 osteosarcoma Diseases 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 5
- 210000002303 tibia Anatomy 0.000 description 4
- 210000000689 upper leg Anatomy 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 210000003414 extremity Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 208000037408 Device failure Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 208000037099 Prosthesis Failure Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000003993 interaction 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
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- 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 buffering structure and a prosthesis component, wherein the prosthesis component comprises a prosthesis, a rotating shaft, a bone hinge base and the buffering structure, wherein the prosthesis, the rotating shaft and the bone hinge base can be used for replacing knee joints of patients suffering from malignant osteosarcoma after being assembled, and the buffering structure is arranged on the rotating shaft, so that impact damage to the prosthesis caused by impact force generated in the processes of walking, running, jumping and the like of the patients 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, at present, most of femur distal end and tibia proximal end osteosarcoma with high incidence rate is treated by limb protection, which is a treatment method of installing a prosthesis in a body to replace a knee joint part after tumor is surgically removed.
However, the prosthesis is placed in a patient for a long time, and the movement of the patient such as walking, jumping and the like in daily life causes the knee joint to bear instantaneous impact force, which causes great damage to the prosthesis. Analysis of various clinical data for prosthetic applications has found that complications such as rigid failure, loosening, etc. of the prosthesis have been common problems, wherein poor shock absorption of the prosthesis is an important cause of the prosthesis failure because the prosthesis in the prior art is a rigid bearing load.
Disclosure of Invention
The invention aims to provide a buffer structure and a prosthesis component, which are used for relieving damage to the prosthesis caused by impact force generated by a patient during walking, running, jumping and other actions.
To achieve the above object, an embodiment of the present invention provides a buffer structure for a prosthetic 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 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; the method comprises the steps of,
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 the acting force to the buffer body when the rotating shaft applies the acting force to the supporting force transmission mechanism, 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 table 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 table, the supporting part can be compressed, so that the connecting rod assembly is driven to move the push rod towards the buffer body.
Optionally, the supporting force transmission mechanism further comprises a supporting part elastically connecting the fixed table and the first shell;
when the rotating shaft applies acting force to the fixed table, the supporting part deforms; when the rotating shaft removes the force applied to the fixed table, the supporting portion resumes the shape, and applies the force to the fixed table to return to the original position.
Optionally, the connecting rod assembly includes first connecting rod and second connecting rod, the fixed station first connecting rod, second connecting rod and first casing articulates in proper order, the push rod with the pin joint connection of first connecting rod and 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 at the opposite side of 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 fixed 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 spindle applies a force to the stationary table, and the link assembly is driven to move the push rod toward the buffer body.
Optionally, an arc-shaped limiting piece is arranged on the surface of the fixing table, which faces 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.
Optionally, the supporting force transmission mechanism further comprises a sliding rail, wherein the sliding rail extends along a second direction and is arranged at the opening of the second shell, 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 an acting force pointing to the first shell to the fixed platform, the fixed platform moves towards the first shell along the sliding rail so that the supporting portion is compressed.
Optionally, the buffer body includes a sub-buffer body, the first sub-buffer body is followed 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 force transmission mechanism is connected, connecting portion are flexible structure, works as support force transmission mechanism will the effort is transmitted to the buffer body, connecting portion produce deformation and absorb the effort.
Optionally, the buffer body includes two at least first sub-buffer bodies, every 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 rigid wall, connecting portion are flexible structure, and mutual contact between two adjacent first sub-buffer bodies, be located the first lateral wall of two sub-buffer bodies at edge respectively with support force transmission mechanism connects, works as support force transmission mechanism will the effort is transmitted to first sub-buffer body, connecting portion produce 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 a 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-buffering 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 sealed space with a variable size, where the sealed space is used to accommodate a compressible fluid.
Optionally, the buffer body further comprises 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 transferred to the second sub-buffer body, the second sub-buffer body can deform to absorb the acting force.
Optionally, the second sub-buffer is a compression spring.
Optionally, the buffer body further includes a stop collar, the stop collar has a stop channel, the second sub-buffer body set up in the stop channel, the stop channel is used for retraining the second sub-buffer body produces the deformation in the direction of connection of two the first sub-buffer body.
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.
To achieve the above object, the present invention further provides a prosthesis assembly comprising a prosthesis, a bone hinge base, a rotation shaft, and a buffering structure as described above; 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 extensible prosthesis.
Compared with the prior art, the buffering structure and the prosthesis assembly have the following advantages:
the prosthesis component comprises a prosthesis, a bone hinge base, a rotating shaft and a buffer structure, wherein the rotating shaft is used for connecting the prosthesis and the bone hinge base, the buffer structure is connected with the prosthesis and comprises a first shell, a second shell, a supporting force transmission mechanism and a buffer body, the second shell and the first shell are coaxially arranged, meanwhile, 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, and the supporting force transmission mechanism is arranged in the working cavity and is positioned at the opening, so that the supporting force transmission mechanism and the second shell jointly enclose a containing cavity to be sleeved on the rotating shaft; when the rotation shaft applies a force to the supporting force transmission mechanism, the supporting force transmission mechanism can be compressed and can transmit the force to the buffer body, so that the buffer body is deformed to absorb the force, and damage to the prosthesis caused by the force is relieved.
Drawings
FIG. 1 is a schematic view of a prosthetic assembly provided according to 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 according to an embodiment of the present invention;
fig. 4 is a schematic view of the cushioning structure depicted in fig. 3 supporting a force transfer mechanism.
In the figure:
1000-prosthesis;
1100-a housing;
1200-extension piece;
1210-visor structure;
1300-limiting piece;
1400 power mechanism;
2000-bone hinge base;
3000-rotating shaft;
4000-buffer structure;
4100—a first housing;
4110-mount;
4200-second housing;
4300-support force-transmitting mechanism;
4310—a stationary table;
4311-limit pieces;
4320-a support;
4330 force transmission parts;
4331-a linkage assembly, 4331 a-a first linkage, 4331 b-a second linkage;
4332 push rod;
4340-sliding rails;
4400-buffer;
4410-a first buffer;
4411-first sidewall, 4412-second sidewall, 4413-connection, 4414-third sidewall, 4415-compressed fluid;
4420-a second buffer;
4430-stop collar.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a more particular description of the embodiments of the invention will be rendered by reference to the appended drawings. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural 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, as for example, they may be fixed, they may be removable, or they may be integrally connected. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. The same or similar reference numbers in the drawings refer to the same or similar parts.
It is an aim of embodiments of the present invention to provide a cushioning structure and a prosthetic assembly. Such as 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 buffering structure 4000, the rotation shaft 3000 being used to connect the prosthesis 1000 and the bone hinge base 2000 such that the prosthesis 1000 and the bone hinge base 2000 are rotated about the rotation shaft 3000, thereby enabling a patient to perform a bending motion after the prosthesis assembly replaces a knee joint. The buffer structure 4000 is sleeved on the rotating shaft 3000 and connected with the prosthesis 1000, and impact force generated when a patient walks, runs, jumps and the like is transmitted to the buffer structure 4000 through the rotating shaft 3000, and the buffer structure 4000 can greatly and even completely absorb the impact force, so that damage to the prosthesis 1000 caused by the impact force is relieved.
In this embodiment, the prosthesis 1000 is preferably an extensible prosthesis, which is mainly used for teenager children patients with malignant osteosarcoma, so that the prosthesis 1000 can be correspondingly extended along with the physical development of the patients, thereby avoiding the condition of unequal lengths of the limbs of the prosthesis.
Fig. 2 shows a cross-sectional view of the prosthesis 1000 in the prosthesis assembly, as shown in fig. 1 and 2, the prosthesis 1000 may include a housing 1100, an extension 1200, a stop 1300, and a power mechanism 1400. The housing 1100 may be a hollow cylinder and have opposite first and second 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 is configured to remain circumferentially relatively stationary with 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 relatively stationary with the housing 1100, and the limiting member 1300 is used for limiting the extension member 1200 in the axial direction under a predetermined condition. The power mechanism 1400 may be a spring, both ends of which are respectively connected to the first end of the housing 1100 and the stopper 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 stopper 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 realizing extension of the prosthesis 1000.
Alternatively, the stopper 1300 is made of a resin, which may be a polyacetal resin in particular. At least one cap peak structure 1210 may be disposed on the circumference of the extension member 1200, and the cap peak structure 1210 extends toward the limiting member 1300. Under the predetermined condition, the friction between the cap peak structure 1210 and the limiting member 1300 is sufficient to keep the extension member 1200 stationary in the axial direction, and when the predetermined condition is released, for example, the extension member 1200 is heated by an electromagnetic field to heat the cap peak structure 1210, thereby softening the limiting member 1300 in contact with the cap peak structure 1210, so that the friction between the cap peak structure 1210 and the limiting member 1300 is reduced, and the extension member 1200 can move along the limiting member 1300. In fact, the structure of the prosthesis 1000 and its working principle are well known to the person skilled in the art.
After the prosthetic component is implanted in a 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 and the bone hinge base 2000 used to replace the distal femur. The cushioning structure 4000 acts like a meniscus in a natural knee to cushion the forces of the patient during movement to protect the prosthesis 1000.
The preferred structure of the buffer structure 4000 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 3, the buffer structure 4000 includes a first housing 4100, a second housing 4200, a supporting force transmission mechanism 4300, and a buffer 4400. The first housing 4100 and the second housing 4200 are hollow structures coaxially arranged, 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, i.e., a direction parallel to 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 disposed at the opening and defines a receiving chamber with the second housing 4100. The buffer body 4400 is disposed in the working chamber and is connected to the support 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 rotation shaft 3000 applies a force F to the support force transmission mechanism 4300 directed toward the first housing 4100, the support force transmission mechanism 4300 transmits the force to the buffer body 4400 to deform the buffer body 4400 to 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 of an elliptical circumference, such as a 2/3 elliptical circumference, or a 3/4 elliptical circumference, etc. The second housing 4200 is thus part of a hollow elliptical cylinder.
In addition, when assembling the buffer structure 4000, the prosthesis 1000, the bone hinge base 2000, and the rotation shaft 3000, it is preferable that the support force transmission mechanism 4300 of the buffer structure 4000 be disposed close to the prosthesis 1000, that is, the support force transmission mechanism 4300 is located between the rotation shaft 3000 and the prosthesis 1000.
Alternatively, the opening may be parallel to the major axis of the oval shape as seen in a radial cross section of the cushioning structure 4000. The first housing 4100 in this embodiment may have a cylindrical structure, an elliptic cylindrical structure, or other cylindrical structures, 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, the support force transmission mechanism 4300 and the buffer body 4400 may be preferably disposed in the working chamber along the circumferential direction of the first housing 4100, so that the buffer body 4400 may be simultaneously located at both sides of the support force transmission mechanism 4300 and connected to the support force transmission mechanism 4300, so that the support force transmission mechanism 4300 transmits the acting force to the buffer body 4400 from both directions, and thus the buffer body 4400 may uniformly absorb the acting force.
Referring to fig. 3 in combination with fig. 4, optionally, the supporting force transmission mechanism 4300 includes a fixing base 4310, a supporting portion 4320, and a force transmission portion 4330. The fixing base 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 base 4310. Both ends of the support 4320 are connected to the fixing base 4310 and the first housing 4100, respectively.
Specifically, in this embodiment, a mounting table 4110 may be disposed at a position where the first housing 4100 faces the opening, and a surface of the mounting table 4110 facing away from the first housing 4100 may be a plane. The support 4320 is connected to the first housing 4100 through the mounting table 4110. In one embodiment, the force transmitting portion 4330 may include a link assembly 4331 and a push rod 4332, both ends of the link assembly 4331 are respectively connected to the fixing stage 4310 and the mounting stage 4110, and both ends of the push rod are respectively connected to the link assembly 4331 and the buffer body 4400.
When the rotating shaft 3000 applies the force F to the fixing base 4310, the fixing base 4310 moves radially toward the first housing 4100 to compress the supporting portion 4320, so that the link assembly 4331 deforms, and the push rod 4332 moves toward the buffer body 4400 to transmit the force F to the buffer body 4400, so that the buffer body 4400 deforms to absorb the force.
Specifically, the number of the link assemblies 4331 is two, the two link assemblies 4331 are arranged along the circumferential direction of the first housing 4100, each link assembly 4331 includes a first link 4331a and a second link 4331b, and the fixing base 4310, the first link 4331a, the second link 4331b and the mounting base 4110 are hinged in sequence, so that the two link assemblies 4331, the fixing base 4310 and the mounting base 4110 form a six-link mechanism. The number of push rods 4332 is also two, and one end of each push rod 4332 is connected to the hinge point of the first link 4331a and the second link 4331b, and the other end is connected to the buffer body 4400. Thus, when the supporting portion 4320 is compressed, the two pushing rods 4332 move away from each other and toward the buffer body 4400, respectively, so as to transmit the force to the buffer body 4400 and deform the buffer body 4400.
And an arc-shaped limiting piece 4311 is arranged on the surface of the fixing table 4310 facing the accommodating cavity, the radian of the limiting piece 4311 can be 60-120 degrees, and the arc-shaped limiting piece 4311 is formed on the fixing table 4310, so that the rotating shaft 3000 can be tightly attached to the fixing table. In order to better adapt the angle of the femur and tibia when they are in motion after implantation of the prosthetic component in the human 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 as shown in fig. 3), 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 the force F to the fixed base 4310, the fixed base 4310 moves along the sliding rail 4340 toward the first housing 4100.
In addition, in the present embodiment, the support part 4320 may be an elastic body including, but not limited to, a spring. In other embodiments, the supporting portion 4320 may be two magnetic structures that are disposed in a repulsive manner, and the supporting function of the fixing base 4310 and the rotating shaft 3000 is achieved by the repulsive force between the two magnetic structures.
It should be understood that the above is one of implementation manners of supporting the force transmission mechanism 4300 under the concept of 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 for supporting the rotating shaft 3000, the force transmission portion 4330 includes a link assembly 4331 and a push rod 4332, two ends of the link assembly 4331 are hinged to the fixing table 4310 and the first housing 4100, and two ends of the push rod 4331 are connected to the link assembly 4331 and the buffer body 4400, respectively. When the rotating shaft 3000 applies a force to the fixed table 4310, which 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 body 4400 deforms to absorb the force transmitted by the supporting force transmission mechanism 4300 when receiving the force.
An alternative configuration of the buffer 4400 is shown in fig. 3 in one exemplary embodiment. 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 connection portion 4413, and a second sidewall 4412 sequentially connected along the 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 sealed space of variable size for receiving a compressible fluid. The first side wall 4411 of each of the first sub-buffers 4410 is connected to the support force transmission mechanism 4300, in particular to the push rod 4332 of the support force transmission mechanism 4300, while the second side walls 4412 of the two first sub-buffers 4410 are connected to each other; the connecting portion 4413 is a flexible structure. Optionally, the two first sub-buffering bodies 4410 are symmetrically disposed in the working chamber. The "rigid wall" herein means a side wall having a large hardness and not being deformed, and the "flexible structure" means a structure having a small hardness and large flexibility and being deformed when subjected to an external force, and in particular, the connection portion may be made of an elastomer rubber (TPU). In this way, when the two first sub-buffers 4410 receive the force, the two first sub-buffers 4410 may be compressed and deformed along the circumferential direction of the first housing 4100 to absorb the force. It will be appreciated that in this embodiment the term "first side wall" is a rigid wall of the first sub-cushion circumferentially closer to the supporting force transfer mechanism, and the term "second side wall" is a rigid wall of the first sub-cushion circumferentially farther from the supporting force transfer mechanism.
Optionally, the connecting portion 4413 includes a third side wall 4414, and the third side wall 4413 is sequentially connected with the first side wall 4411 and the second side wall 4412 to form a sealed space with a variable size, and the sealed space is filled with a compressed fluid 4415 having a buffering function, wherein the compressed fluid 4415 may be a gas or a liquid, so as to buffer the acting force by using the compressibility of the gas or the liquid.
Because the air pressure of the air is not easy to control when the air is stressed, the inner cavity is preferably filled with liquid, and generally, the optional liquid has certain viscosity, so that the unordered flow of the liquid can be avoided by utilizing the friction force generated by the relative motion of the flowable layer of the fluid particles of the viscous liquid, and the function of buffering action force is further achieved. Specifically, the liquid can be high-viscosity silicone oil, and the viscosity of the high-viscosity silicone oil is 100-500 ten thousand Cs at 25 ℃, so that the liquid can completely meet the requirements of the embodiment. Of course, in some embodiments, other liquids of comparable viscosity may be filled into the lumen.
Further, with continued reference to fig. 3, the buffer body 4400 may further include a second sub-buffer body 4420, wherein the second buffer body 4420 is disposed between the second sidewalls 4412 of the two first sub-buffer bodies 4410 and is connected to the two second sidewalls 4412 at the same time (i.e., the two second sidewalls 4412 are connected by the second sub-buffer body 4420). When the force is large, the two first sub-buffering bodies 4410 are insufficient to absorb the force completely, and the two first sub-buffering bodies 4410 continuously transmit the force to the second sub-buffering bodies 4420 from two directions, and the second sub-buffering bodies 4420 further buffer the force. In general, the second sub-cushion 4420 may be an elastomer including, but not limited to, a compression spring. When the force is transmitted to the second sub-buffering body 4420, the second sub-buffering body 4420 is compressively deformed to absorb the force under the pressing of the two first sub-buffering bodies 4410.
Optionally, the buffer body 4400 further includes a stop collar 4430, the stop collar 4430 has a stop channel, the second sub buffer body 4420 is disposed in the stop channel, and the stop 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 the acting force to the second sub buffer body 4420, the second sub buffer body 4420 is compressed along the circumferential direction to play a role of buffering to the greatest extent.
The principle of the buffer structure 4000 according to the present embodiment will be described.
When the rotating shaft 3000 receives a force F, the rotating shaft 3000 transmits the force F to the buffer device 4000. As shown in fig. 3, the fixing base 4310 moves toward the first housing 4100 under the action of the force, and presses the supporting portion 4320 and the link assembly 4331, and the supporting portion 4320 and the link assembly 4331 are compressed in the radial direction, so that the two push rods 4332 move away from each other in the circumferential direction toward the first sub-buffer 4410, thereby pressing the first sub-buffer 4410, and the two first sub-buffers 4410 deform to absorb the force. At this time, if the acting force F is smaller, the two first sub-buffers 4410 may completely absorb the acting force generated by the first sub-buffers; if the force is large and the two first sub-buffering bodies 4410 are insufficient to completely buffer them, the two first sub-buffering bodies 4410 continue to transmit the force to the second sub-buffering bodies 4420, and the second sub-buffering bodies 4420 deform to further buffer.
Through the above force transmission process, the acting force is buffered at least through the first sub-buffering body 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 slowing down the damage to the prosthesis 1000.
Of course, after the force F applied to the shaft 3000 is removed, the supporting portion 4320 can be restored, and the buffer body 4400 can be restored.
It is to be 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 comprises only one of the first sub-buffer bodies, and the first side wall and the second side wall of one of the sub-buffer bodies are respectively used for being connected with two push rods (not shown) supporting the force transmission mechanism. For another example, in one embodiment, the buffer body includes two first sub buffer bodies, the two first sub buffer bodies are arranged along the circumferential direction of the working cavity, the second side walls of the two first sub buffer bodies are in contact with each other, and the first side walls of the two first sub buffer bodies are respectively connected with two push rods (not shown) supporting the force transmission mechanism. Of course, the number of the first sub-buffers may be greater, for example, 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, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (17)
1. A cushioning structure for a prosthetic assembly, 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 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; the method comprises the steps of,
the buffer body is arranged in the working cavity and is connected with the supporting force transmission mechanism; the buffer body and the supporting force transmission mechanism are arranged along the circumferential direction of the first shell;
the accommodating cavity is used for accommodating a rotating shaft extending along a first direction, the supporting force transmission mechanism is configured to be in contact with the rotating shaft, and when the rotating shaft applies a force directed to the first shell to the supporting force transmission mechanism, the supporting force transmission mechanism can transmit the force to the buffer body along the circumferential direction of the first shell so as to deform the buffer body to absorb the force.
2. The cushioning structure of claim 1, wherein the support force transfer mechanism comprises:
the fixed table is arranged at the opening and used for supporting the rotating shaft;
a support portion elastically connecting the fixed table and the first housing;
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 table 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 table, the supporting part can be compressed, so that the connecting rod assembly is driven to move the push rod towards the buffer body.
3. The buffer structure according to claim 2, wherein,
when the rotating shaft applies acting force to the fixed table, the supporting part deforms; when the rotating shaft removes the force applied to the fixed table, the supporting portion resumes the shape, and applies the force to the fixed table to return to the original position.
4. The cushioning structure according to claim 2, wherein the link assembly includes a first link and a second link, the stationary platen, the first link, the second link, and the first housing are hinged in sequence, and the push rod is connected to the hinge points of the first link and the second link.
5. The cushioning structure of claim 1, wherein the support 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 at the opposite side of the opening; the method comprises the steps of,
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 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 rotation shaft applies a force to the fixed stage, the link assembly is driven to move the push rod toward the buffer body.
6. The buffering structure according to claim 2, wherein an arc-shaped limiting piece is arranged on the surface, facing the accommodating cavity, of the fixing table, 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 support force transfer mechanism further comprises a sliding rail extending in a second direction and disposed at the opening of the second housing, the second direction being perpendicular to the first direction; the limiting piece is connected with the sliding rail, and when the rotating shaft applies an acting force pointing to the first shell to the fixed platform, the fixed platform moves towards the first shell along the sliding rail so that the supporting portion is compressed.
8. The cushion structure according to claim 1, wherein the cushion body includes a first sub-cushion body, a first side wall, a connecting portion, and a second side wall that are sequentially connected in a circumferential direction of the working chamber, 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 cushion body, the connecting portion deforms to absorb the acting force.
9. The cushion structure according to claim 1, wherein the cushion body includes at least two first sub-cushion bodies, each of the first sub-cushion bodies includes a first side wall, a connecting portion, and a second side wall that are sequentially connected in a circumferential direction of the working chamber, the first side wall and the second side wall are rigid walls, the connecting portion is a flexible structure, two adjacent first sub-cushion bodies are in contact with each other, the first side walls of the two sub-cushion bodies located at edges are respectively connected with the supporting force transfer mechanism, and when the supporting force transfer mechanism transfers the acting force to the first sub-cushion bodies, the connecting portion deforms to absorb the acting force.
10. The cushion structure according to claim 1, wherein the cushion body includes two first sub-cushion bodies, each of the first sub-cushion bodies includes a first side wall, a connecting portion, and a second side wall that are sequentially connected in a circumferential direction of the working chamber, 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-buffering body, the connecting part deforms to absorb the acting force.
11. The cushioning structure of any one of claims 8-9, wherein the connecting portion includes a third sidewall, the first, second, and third sidewalls enclosing a variable-sized enclosed space for containing a compressible fluid.
12. The cushioning structure of claim 9, wherein said cushioning body further comprises a second sub-cushioning body through which two of said first sub-cushioning bodies are connected, said second sub-cushioning body being capable of deforming to absorb said force when said force is transferred to said second sub-cushioning body.
13. The cushioning structure of claim 12, wherein the second sub-cushioning body is a compression spring.
14. The cushioning structure of claim 13, wherein the cushioning body further comprises a stop collar having a stop channel, the second sub-cushioning body being disposed within the stop channel, the stop channel being configured to constrain the second sub-cushioning body to deform in a direction of connection of the two first sub-cushioning bodies.
15. The cushioning structure of claim 1, wherein the radial cross-section of the second housing is a portion of an elliptical circumference and the opening is disposed parallel to a major axis of the ellipse in which the radial cross-section of the second housing is located.
16. A prosthetic component comprising a prosthesis, a bone hinge base, a shaft, and a cushioning structure according to 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. The prosthesis assembly of claim 16, wherein the prosthesis is a malleable prosthesis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252220.2A CN113017932B (en) | 2019-12-09 | 2019-12-09 | Buffer structure and prosthesis assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911252220.2A CN113017932B (en) | 2019-12-09 | 2019-12-09 | Buffer structure and prosthesis assembly |
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| CN113017932B true CN113017932B (en) | 2024-02-20 |
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| 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 |
Citations (6)
| 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 |
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020143402A1 (en) * | 1995-09-04 | 2002-10-03 | Limber Ltd. | Hip joint prostheses |
| KR101469539B1 (en) * | 2014-03-03 | 2014-12-05 | 김석환 | Flexure Joint Structure and Training Device, Ring Type Joint Structure, Construction toy and Artificial Joint using the Joint Device |
-
2019
- 2019-12-09 CN CN201911252220.2A patent/CN113017932B/en active Active
Patent Citations (6)
| 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 |
| 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 |
| CN105434086A (en) * | 2016-02-01 | 2016-03-30 | 中南大学湘雅医院 | Wrist joint implant body |
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