CN111839839B - Novel tibial platform test pad - Google Patents
Novel tibial platform test pad Download PDFInfo
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- CN111839839B CN111839839B CN202010705280.1A CN202010705280A CN111839839B CN 111839839 B CN111839839 B CN 111839839B CN 202010705280 A CN202010705280 A CN 202010705280A CN 111839839 B CN111839839 B CN 111839839B
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- 238000012360 testing method Methods 0.000 title claims abstract description 97
- 210000002303 tibia Anatomy 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 22
- 210000000629 knee joint Anatomy 0.000 abstract description 21
- 230000007704 transition Effects 0.000 abstract description 10
- 238000005457 optimization Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 210000004417 patella Anatomy 0.000 description 8
- 210000000426 patellar ligament Anatomy 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 210000000689 upper leg Anatomy 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000002980 postoperative effect Effects 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000013150 knee replacement Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003407 lower extremity of femur Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 210000001694 thigh bone Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools for implanting artificial joints
- A61F2/468—Testing instruments for artificial joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools for implanting artificial joints
- A61F2/4657—Measuring instruments used for implanting artificial joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools for implanting artificial joints
- A61F2/4684—Trial or dummy prostheses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools for implanting artificial joints
- A61F2/4657—Measuring instruments used for implanting artificial joints
- A61F2002/4658—Measuring instruments used for implanting artificial joints for measuring dimensions, e.g. length
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Transplantation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Surgery (AREA)
- Prostheses (AREA)
Abstract
The application discloses a novel tibial platform test pad, which comprises a test pad head and a test pad handle, wherein the test pad head is provided with a limiting hole matched with the test pad handle; the test pad handle comprises a connecting rod with a rectangular cross section, and the connecting rod is in transition or interference fit with the limiting hole; the end part of the connecting rod is fixedly provided with an installation column, the bottom of the limiting hole is provided with an installation hole, and the installation column is in clearance or transition fit with the installation hole; and the bottom of the limiting hole is provided with a chamfer structure, and the limiting hole and the mounting hole are in smooth transition. The utility model provides a novel shin bone platform is tried to be filled up and is observed in the use of operation step, surgical instruments and art and judge and all have the optimization, has effectively improved the success rate of operation, satisfies the demand of knee joint unicondylar replacement operation.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a novel tibial platform test pad.
Background
The tibia platform test pad is an instrument for testing joint mobility, whether a pad impacts with a femur or a tibia and evaluating joint clearance in a unicondylar knee joint replacement operation as a product selection reference, is used for the unicondylar knee joint replacement operation, and determines the clearance and the mobility of a knee joint unicompartmental chamber so as to reduce operation difficulty.
The tibial platform test pad before improvement is really progressive in the unicondylar knee joint operation, but the inventor finds that the tibial platform test pad has a plurality of defects in practical use, so that the knee joint cannot achieve the optimal use effect when the knee joint evaluates the joint mobility and looks up the motion track of the pad.
There are currently two types of tibial platform trial pads on the market, one with and one without a handle, and the disadvantages can be summarized as follows:
1. when the tibial platform test pad with the handle is used for evaluating joint clearance and activity, the handle position is influenced by patella and patellar ligament, and joint clearance and activity cannot be accurately judged.
2. The tibial platform test pad without the handle is inconvenient for observing the motion track of the joint during the movement.
It can be seen that the problem that the tibial platform test pad before improvement still cannot meet the clinical practical requirements still exists, and the preparation of two test pads can increase the number of operation steps and surgical instruments of an operation, and undoubtedly increase the difficulty in the operation. How to develop an instrument capable of accurately and rapidly testing the gap, the mobility and the motion trail of the joint is one of the current important research topics in the field.
Disclosure of Invention
In order to improve the demand that current unilateral shin bone platform examination pad can't satisfy in the art when knee joint unicondylar replaces, this application provides a novel shin bone platform examination pad.
The application provides a novel shin bone platform examination pad adopts following technical scheme:
the utility model provides a novel shin bone platform examination pad, fills up head and examination pad handle including trying, try to fill up the head have with try to fill up the spacing hole of handle looks adaptation, try to fill up the handle dress and inlay in spacing hole, can dismantle with trying to fill up the head and be connected.
Through adopting above-mentioned technical scheme, the shin bone platform is tried to fill up and is being torn open examination pad handle back, utilizes examination pad head to measure joint mobility, joint clearance, confirm that liner and thighbone condyle postcondylar and distal end can be more accurate when having or not take place the striking, and measurement process does not receive the influence of patella and patellar ligament, the joint motion condition of fine simulation postoperative. After the trial pad handle is installed on the tibial platform trial pad, the front-back and inner-outer rotating motion tracks of the tibial platform trial pad can be judged according to the position of the trial pad handle when the knee joint is bent and extended, whether the motion condition of the joint meets the expectation of an operation or not is judged, and whether the risk of pad dislocation exists or not is judged. The tibia platform test pad is optimized in the operation steps, the use of surgical instruments and observation and judgment in the operation, the success rate of the operation is effectively improved, and the requirement of knee joint unicondylar replacement operation is met.
The application is further configured to: the test pad handle comprises a connecting rod with a rectangular cross section, and the connecting rod is in transition or interference fit with the limiting hole.
By adopting the technical scheme, the connecting rod is inserted into the limiting hole, so that the test pad handle is installed on the head of the test pad; the transition or interference fit ensures the stability of the embedding of the connecting rod and the limiting hole; the connecting rod cross-section sets up to square to the rotation takes place for the connecting rod in spacing hole, influences the installation effect of examination pad handle.
The application is further configured to: the end part of the connecting rod is fixedly provided with an installation column, the bottom of the limiting hole is provided with an installation hole, and the installation column is in clearance or transition fit with the installation hole; and the bottom of the limiting hole is provided with a chamfer structure, and the limiting hole and the mounting hole are in smooth transition.
Through adopting above-mentioned technical scheme, the effect that the connecting rod played the direction is set up to of erection column and mounting hole and chamfer structure, makes the doctor can be quicker in the art install the examination pad handle on examination pad head, makes things convenient for doctor's operation.
The application is further configured to: the test pad handle comprises a connecting rod, a clamping piece with deformability is arranged on the connecting rod, and a clamping groove matched with the clamping piece is formed in the limiting hole.
By adopting the technical scheme, the clamping piece deforms in the clamping groove so as to clamp the end part of the connecting rod in the limiting hole, and the installation of the test pad handle can be completed; the deformation of the clamping piece is removed during disassembly, so that the test pad handle can be separated from the test pad head, and the disassembly and assembly process is easy and convenient to operate.
The application is further configured to: the connecting rod is provided with a force application part for keeping the clamping part in a deformation state.
Through adopting above-mentioned technical scheme, the joint spare keeps in deformation state in spacing hole, even try to fill up the handle and keep under the installation status, improves the stability of trying to fill up the handle installation.
The application is further configured to: the outer peripheral surface of the connecting rod is provided with a thread section, and the force application part is in threaded connection with the connecting rod.
Through adopting above-mentioned technical scheme, threaded connection has the stable characteristics of marcing, can drive about the joint piece gently and carry out deformation, improves the security of operation in the art.
The application is further configured to: the clamping piece is of an elastic plate-shaped structure, one end of the clamping piece is fixedly connected with the peripheral surface of the connecting rod, and the other end of the clamping piece abuts against the force application piece in a free state.
Through adopting above-mentioned technical scheme, elastic deformation can take place for joint spare self, and after joint spare stretched into to the draw-in groove along with connecting rod synchronous movement, utilized application of force spare to order about application of force spare and move towards joint spare, extrudeed the free end of joint spare, made joint spare take place elastic deformation in the draw-in groove, with draw-in groove extrusion fit to with the connecting rod end fixing in the draw-in groove. When trying to fill up the handle and trying to fill up the head separation, the counter rotation application of force spare, the joint spare resets under the effect of self elasticity, and with the draw-in groove separation, then directly with trying to fill up the handle from trying to fill up the head extract can.
The application is further configured to: the clamping piece is of a two-hinged-connection-rod structure, one end of the clamping piece is hinged to the outer peripheral surface of the connection rod, and the other end of the clamping piece abuts against the force application piece in a free state.
Through adopting above-mentioned technical scheme, when trying to fill up the handle installation, the connecting rod is inserted and is established in spacing hole, utilizes application of force spare extrusion joint spare free end, and joint spare rigidity supports presses in the draw-in groove, realizes the fixed mounting of connecting rod in spacing hole. When the test pad handle is detached, the force application piece is rotated reversely, the clamping piece is loosened immediately, and then the test pad handle is directly pulled out from the head of the test pad.
The application is further configured to: the clamping piece is of a two-hinged-connection-rod structure, one side of the force application piece, facing the clamping piece, is coaxially provided with a connection ring, and the connection ring is in sliding fit with the force application piece; one end of the clamping piece is hinged on the outer peripheral surface of the connecting rod, and the other end of the clamping piece is hinged on the connecting ring.
Through adopting above-mentioned technical scheme, when trying to fill up the handle installation, the connecting rod is inserted and is established in spacing hole, utilizes application of force spare extrusion joint spare, and joint spare rigidity supports presses in the draw-in groove, realizes the fixed mounting of connecting rod in spacing hole. When the test pad handle is detached, the force application part rotates reversely, the force application part drives the connecting ring to retreat synchronously, and the connecting ring pulls the clamping part to retract and separate from the clamping groove, so that the detaching process of the connecting rod is smoother.
The application is further configured to: the test pad handle also comprises a grab handle which is fixedly connected with the end part of the connecting rod; the grab handle is provided with a force line rod in a penetrating way.
By adopting the technical scheme, the force line rod perpendicular to the tibial platform is assembled on the trial pad handle, the alignment condition of the force line can be visually judged, and the reference is made for correcting the force line of the knee joint.
In summary, the present application includes at least one of the following beneficial technical effects:
1. tibial platform test pad can accurate measurement: the tibia platform test pad is designed with a quick-release structure, so that the joint mobility and the joint clearance can be measured after a handle is removed, the pad can be more accurately determined when the pad is not impacted with the femoral condyle posterior condyle and the distal end, the influence of patella and patellar ligament is avoided, and the postoperative joint motion condition can be well simulated;
2. the tibia platform test pad can accurately judge the motion track of the pad: after the tibial platform test pad is installed on the handle, the front-back and inside-outside rotating motion tracks of the tibial platform test pad can be judged according to the position of the handle during the flexion and extension motion of the knee joint, the motion condition of the joint is judged, whether the motion condition accords with the expectation of an operation, and whether the risk of pad dislocation exists.
Drawings
FIG. 1 is a schematic view of a human knee joint;
FIG. 2 is a schematic view of the construction of the surgical accessory in a unicondylar knee replacement procedure;
fig. 3 is a schematic structural view of the novel tibial plateau test pad of example 1 of the present application;
fig. 4 is a schematic structural view of the novel tibial plateau test pad of example 2 of the present application;
fig. 5 is a schematic structural view of the novel tibial plateau test pad of example 3 of the present application;
FIG. 6 is an enlarged view of portion A of FIG. 5;
fig. 7 is a schematic structural view of the novel tibial plateau test pad of example 4 of the present application;
FIG. 8 is an enlarged view of portion B of FIG. 7;
fig. 9 is a schematic structural view of the clip member and the force applying member according to embodiment 4 of the present application;
fig. 10 is an enlarged view of a portion C in fig. 9.
Description of reference numerals: 1. testing the head of the cushion; 11. a limiting hole; 12. mounting holes; 13. a card slot; 2. a test pad handle; 21. a connecting rod; 22. a handle; 23. mounting a column; 24. a force wire hole; 3. a force wire rod; 31. a fixed block; 4. a clamping piece; 5. a force application member; 51. connecting grooves; 52. a connecting ring; 6. a knee joint; 61. the lower end of the femur; 62. the upper end of the tibia; 63. a patella; 64. the patellar ligament; 7. a femoral prosthesis; 8. a tibial plateau.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Referring to fig. 1, the human knee joint 6 is composed of a lower femoral end 61, an upper tibial end 62, a patella 63, and a patellar ligament 64.
Referring to fig. 2, in the unicondylar knee replacement surgery, a femoral prosthesis 7 (or a trial condyle or a femoral trial) is mounted at a lower end 61 of a femur, a tibial plateau 8 (or a trial tibial plateau or a tibial plateau support) is mounted at an upper end 62 of a tibia, a gasket is mounted between the femoral prosthesis 7 and the tibial plateau 8, and the gasket is in sliding fit with the femoral prosthesis 7 and is fixedly connected with the tibial plateau 8.
Prior to installation of the liner, a unilateral tibial plateau trial (or liner trial) is required for the relevant test. The embodiment of the application discloses novel shin bone platform examination pad does not receive the influence of patella 63 and patellar ligament 64, and the postoperative joint motion condition of simulating that can be fine to judge whether the joint accords with the expectation of operation, whether have the risk of liner dislocation.
Example 1
Referring to fig. 3, the novel tibial platform test pad comprises a test pad head 1 and a test pad handle 2, wherein the test pad handle 2 is detachably mounted on the test pad head 1. During the unicondylar knee joint replacement surgery, the head part 1 of the test pad is arranged between the femoral prosthesis 7 and the tibial plateau 8, and the handle 2 of the test pad is positioned outside the knee joint 6 of the human body.
The main body of the head part 1 of the test pad is rectangular block-shaped, the top surface of the head part is arranged in a concave manner and is used for being matched with the spherical surface of the lower end 61 of the femur; the bottom surface of the head part 1 of the test pad is a plane and is used for being matched with the plane of the tibial platform 8, so that the head part 1 of the test pad can be attached to and pressed on the tibial platform 8 and can move relative to the femur and the tibia.
The end part of the test pad head part 1 extending from the position between the lower femur end 61 and the upper tibia end 62 is a front end, the end part opposite to the front end is a rear end, and the thickness of the front end of the test pad head part 1 is smaller than that of the rear end. After the test pad head 1 is installed between the femoral prosthesis 7 and the tibial plateau 8, the back end of the test pad head 1 faces towards the patella of the knee joint 6.
The test pad handle 2 mainly comprises a connecting rod 21 and a grab handle 22 which are fixedly connected; the end of the connecting rod 21 far away from the grab handle 22 is coaxially provided with a mounting column 23, and the diameter of the mounting column 23 is smaller than that of the connecting rod 21. In the present embodiment, the cross section of the mounting post 23 is circular, and the cross section of the connecting rod 21 is square.
The rear end of the head part 1 of the test pad is provided with a limiting hole 11 matched with the connecting rod 21, the bottom of the limiting hole 11 is coaxially provided with a mounting hole 12 matched with the mounting column 23, and the bottom of the limiting hole 11 is provided with a chamfer structure, so that the limiting hole 11 and the mounting hole 12 are in smooth transition. The mounting column 23 and the mounting hole 12 are in clearance or transition fit, and the connecting rod 21 and the limiting hole 11 are in transition or interference fit.
When the test pad handle 2 is installed on the test pad head 1, the installation column 23 firstly penetrates through the limiting hole 11, the installation column 23 is finally embedded in the installation hole 12 through the hole wall of the limiting hole 11 and the guide of the chamfer angle structure, and the end part of the connecting rod 21 is synchronously embedded in the limiting hole 11, so that the installation of the test pad handle 2 is completed; when the test pad is separated, the handle 2 of the test pad is directly pulled out from the head 1 of the test pad. The mounting column 23 and the mounting hole 12 are arranged to form a guide function of the connecting rod 21, so that a doctor can more quickly install the test pad handle 2 on the test pad head 1 in an operation, and the operation of the doctor is facilitated.
The tibia platform test pad of the embodiment can be more accurate when the test pad head 1 is used for measuring joint mobility and joint clearance and determining whether the pad collides with the femoral condyle postcondyles and the far end after the test pad handle 2 is removed, and the measurement process is not influenced by the patella 63 and the patellar ligament 64, so that the postoperative joint motion condition is well simulated.
After the trial pad handle 2 is installed on the tibial platform trial pad, the front-back and inside-outside rotating motion tracks of the tibial platform trial pad can be judged according to the position of the trial pad handle 2 when the knee joint 6 is bent and straightened, whether the activity condition of the joint meets the expectation of an operation or not is judged, and whether the risk of pad dislocation exists or not is judged.
The tibia platform test pad is optimized in the operation steps, the use of surgical instruments and observation and judgment in the operation, the success rate of the operation is effectively improved, and the requirement of the knee joint 6 unicondylar replacement operation is met.
Example 2
Referring to fig. 4, the present embodiment is different from embodiment 1 in that the novel tibial plateau test pad further includes a force line bar 3. A force line hole 24 is radially formed in a handle 22 of the test pad handle 2 in a penetrating mode, and the force line rod 3 is arranged in the force line hole 24 in a penetrating mode and is in sliding fit with the force line hole 24; the fixing block 31 is fixedly arranged on the rod body of the force line rod 3, and after the fixing block 31 is pressed on the test pad handle 2 in a propping mode, the force line rod 3 is limited so as to achieve installation of the force line rod 3 on the test pad handle 2. The end of the force wire shaft 3 is rounded so that the force wire shaft 3 penetrates into the force wire hole 24.
After the test pad handle 2 is arranged on the test pad head part 1, the axis of the force line rod 3 is vertical to the bottom surface of the test pad head part 1. The tibial platform test pad can visually judge the alignment condition of the force line by assembling the force line rod 3 perpendicular to the tibial platform 8 on the test pad handle 2, and makes reference to the force line of the correction knee joint 6.
Example 3
Referring to fig. 5 and 6, the difference between the embodiment and embodiment 1 is that the connecting rod 21 of the handle 2 of the test pad is a round rod, the end of the connecting rod 21 away from the handle 22 is provided with the clamping member 4, the limiting hole 11 of the head 1 of the test pad is provided with the clamping groove 13 matched with the clamping member 4, the connecting rod 21 is connected with the force application member 5 through a thread, and the clamping member 4 is fixed in the clamping groove 13 by the force application member 5 through extrusion, so that the connecting rod 21 is fixed in the limiting hole 11.
The clamping piece 4 is of an elastic folded plate or arc-shaped plate structure, and the folded plate structure is selected in the embodiment; one end of the folded plate structure is fixedly connected to the outer peripheral surface of the connecting rod 21, the other end of the folded plate structure and the connecting rod 21 are arranged in a split mode, and the bending point of the folded plate structure is far away from the connecting rod 21. The card slots 13 correspond to the card members 4 one to one.
In this embodiment, the force applying member 5 is a nut, and a threaded section matched with the nut is provided on the outer peripheral surface of the connecting rod 21, so that the nut can perform reciprocating linear motion along the axis of the connecting rod 21.
When the trial pad handle 2 of this embodiment is installed, insert limiting hole 11 with connecting rod 21 earlier, joint spare 4 stretches into to draw-in groove 13 along with connecting rod 21 synchronous motion, then rotatory application of force spare 5 orders about application of force spare 5 and removes towards joint spare 4, extrudees the free end of joint spare 4, makes joint spare 4 take place elastic deformation in draw-in groove 13, with draw-in groove 13 extrusion fit to with connecting rod 21 end fixing in draw-in groove 13.
When trying to fill up handle 2 and the separation of trying to fill up head 1, the counter rotation application of force piece 5, joint 4 resets under the effect of self elasticity, separates with draw-in groove 13, then directly will try to fill up handle 2 and extract from trying to fill up head 1 can.
Example 4
Referring to fig. 7 and 8, the present embodiment is different from embodiment 3 in that the clamping member 4 is a two-hinged-connection-rod structure, one end of the connection-rod structure is hinged to the outer circumferential surface of the connection rod 21 by using a connection lug, the other end of the connection structure is separated from the connection rod 21, and the bending point of the connection-rod structure is far away from the connection rod 21. The card slots 13 correspond to the card members 4 one to one.
The biasing member 5 is also formed as a nut and is screwed to the connecting rod 21. When the test pad handle 2 is installed, the connecting rod 21 is inserted into the limiting hole 11, then the force application part 5 is rotated, the force application part 5 moves to extrude the free end of the clamping part 4, the clamping part 4 is enabled to be rigidly supported and pressed in the clamping groove 13, and the fixed installation of the connecting rod 21 in the limiting hole 11 is realized. When the test pad handle 2 is detached, the force application part 5 is rotated reversely, the clamping part 4 is loosened immediately, and then the test pad handle 2 is directly pulled out from the test pad head 1.
The matching mode of the clamping piece 4 and the force applying piece 5 can also be hinged. Referring to fig. 9 and 10, the force application member 5 has an annular connecting groove 51 coaxially formed on one side facing the fastening member 4, the connecting groove 51 has a connecting ring 52 in a sliding fit manner, one end of the fastening member 4 is hinged on the outer peripheral surface of the connecting rod 21 by using a connecting lug, and the other end of the fastening member is hinged on the connecting ring 52 by using a connecting lug.
The coupling groove 51 is further provided with a stopper for partially blocking the coupling ring 52 to prevent the coupling ring 52 from coming off the coupling groove 51. Thus, when the force application member 5 is rotated, the force application member 5 drives the connection ring 52 to move synchronously, so as to drive the clamping member 4 to do outward expansion or inward contraction movement at the same time, and the installation or disassembly process of the connection rod 21 is smoother.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (3)
1. The utility model provides a novel shin bone platform examination pad which characterized in that: the test pad comprises a test pad head (1) and a test pad handle (2), wherein the test pad head (1) is provided with a limiting hole (11) matched with the test pad handle (2), and the test pad handle (2) is embedded in the limiting hole (11) and is detachably connected with the test pad head (1);
the test pad handle (2) comprises a connecting rod (21), and the connecting rod (21) is in clearance fit with the limiting hole (11); the connecting rod (21) is provided with a clamping piece (4) with deformation capacity, and a clamping groove (13) matched with the clamping piece (4) is formed in the limiting hole (11);
the connecting rod (21) is provided with a force application part (5) for keeping the clamping part (4) in a deformation state;
the clamping piece (4) is of an elastic plate-shaped structure, one end of the clamping piece (4) is fixedly connected with the peripheral surface of the connecting rod (21), and the other end of the clamping piece (4) abuts against the force application piece (5) in a free state;
or the clamping piece (4) is of a two-hinged-rod structure, one end of the clamping piece (4) is hinged to the outer peripheral surface of the connecting rod (21), and the other end of the clamping piece (4) abuts against the force application piece (5) in a free state.
2. The novel tibial plateau test pad of claim 1, wherein: the outer circumferential surface of the connecting rod (21) is provided with a threaded section, and the force application part (5) is in threaded connection with the connecting rod (21).
3. The novel tibial plateau test pad of any one of claims 1-2, wherein: the test pad handle (2) further comprises a grab handle (22), and the grab handle (22) is fixedly connected to the end part of the connecting rod (21); the grab handle (22) is provided with a force line rod (3) in a penetrating way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705280.1A CN111839839B (en) | 2020-07-21 | 2020-07-21 | Novel tibial platform test pad |
Applications Claiming Priority (1)
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| CN112402074B (en) * | 2020-11-17 | 2024-12-17 | 宽岳医疗器材（苏州）有限公司 | Tibial Tray Trial Components |
| CN112773579B (en) * | 2021-01-29 | 2023-07-25 | 北京市春立正达医疗器械股份有限公司 | Test pad extractor |
| CN113456253A (en) * | 2021-07-08 | 2021-10-01 | 中国人民解放军陆军军医大学第二附属医院 | Protection device for posterior cruciate ligament and peripheral bone in knee joint replacement |
| CN113397651B (en) * | 2021-07-21 | 2023-04-18 | 袁海浪 | Auxiliary positioning device for longitudinal tibial osteotomy position in unicondylar replacement |
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