CN211962047U - Simple measuring device for knee joint mobility - Google Patents
Simple measuring device for knee joint mobility Download PDFInfo
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- CN211962047U CN211962047U CN202020327019.8U CN202020327019U CN211962047U CN 211962047 U CN211962047 U CN 211962047U CN 202020327019 U CN202020327019 U CN 202020327019U CN 211962047 U CN211962047 U CN 211962047U
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Abstract
The utility model relates to a simple and easy measuring device of knee joint mobility, include: a shank fixing plate, a thigh fixing plate and a turntable; the thigh fixing plate is fixedly connected with the rotary table, the shank fixing plate is movably connected with the rotary table, the shank fixing plate can rotate anticlockwise along the shaft of the rotary table, the rotary table is cylindrical, scales are arranged on the cylindrical surface of the rotary table, an L-shaped pointer is arranged on the upper surface of the rotary table, the rotation angle of the L-shaped pointer is consistent with that of the shank fixing plate all the time, one section of the L-shaped pointer is parallel to the radius of the rotary table, and the other section of the L-shaped pointer is parallel to the axis of the cylindrical surface of the rotary table. The patient can independently complete the measurement of the knee joint mobility, and the workload of medical workers and family members of the patient is reduced; the device has simple structure, convenient operation and strong practicability.
Description
Technical Field
The utility model belongs to joint mobility test field, concretely relates to simple and easy measuring device of knee joint mobility.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
The joint mobility refers to the arc of motion or the angle of rotation through which the joint moves. The joint activity degree is divided into active joint activity degree and passive joint activity degree, the former is generated by active contraction of muscles, the latter is generated by external force, and free movement of muscles is avoided.
The degree of knee joint movement is very important, and the normal operation of the human body can be guaranteed within a normal range. The degree of knee joint motion is generally 0-130 degrees of flexion and extension, 0-30 degrees of internal rotation, and 0-40 degrees of external rotation.
However, in the treatment and rehabilitation process of patients who perform rehabilitation exercises after pedestrian knee joint replacement, artificial knee joint single replacement, high tibial osteotomy and arthroscopic surgery, the knee joint mobility of the patients is usually examined regularly, generally 3 to 5 times per day, but the inventor finds that: when the existing commonly-used protractor is used for measuring the knee joint mobility, the protractor is inconvenient to fix and read and generally needs two persons to complete, so that a large workload is caused to medical workers; in addition, the patient can not finish detection and recording independently at home, and the cooperation of family members is needed, so the use is inconvenient.
Disclosure of Invention
In order to overcome the problems, the utility model provides a simple knee joint mobility measuring device, which enables the patient to independently complete the knee joint mobility measurement and reduces the workload of medical workers and family members of the patient; the measurement convenience is improved; the device has simple structure, convenient operation and strong practicability.
In order to realize the technical purpose, the utility model discloses a technical scheme as follows:
a simple knee joint mobility measuring device comprises: a shank fixing plate, a thigh fixing plate and a turntable; the thigh fixing plate is fixedly connected with the rotary table, the shank fixing plate is movably connected with the rotary table, the shank fixing plate can rotate anticlockwise along the shaft of the rotary table, the rotary table is cylindrical, scales are arranged on the cylindrical surface of the rotary table, an L-shaped pointer is arranged on the upper surface of the rotary table, the rotation angle of the L-shaped pointer is consistent with that of the shank fixing plate all the time, one section of the L-shaped pointer is parallel to the radius of the rotary table, and the other section of the L-shaped pointer is parallel to the axis of the cylindrical surface of the rotary table.
The utility model discloses an add on original calibrated scale and establish the pointer to let the pointer buckle (as shown in fig. 3) in the cylindrical surface of calibrated scale outside the calibrated scale, and also set up corresponding scale on the cylindrical surface of calibrated scale, make the patient can directly carry out turned angle's reading when the position of sitting. The patient can independently complete the measurement of the knee joint mobility, and the workload of medical workers and family members of the patient is reduced; the measurement convenience is improved; the device has simple structure, convenient operation and strong practicability.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses an add on original calibrated scale and establish the pointer to let the pointer buckle (as shown in fig. 3) in the cylindrical surface of calibrated scale outside the calibrated scale, and also set up corresponding scale on the cylindrical surface of calibrated scale, make the patient can directly carry out turned angle's reading when the position of sitting.
(2) The utility model has the advantages of simple structure, convenient operation, with low costs, the practicality is strong, has better commercial application prospect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of a knee joint mobility measurement in the prior art.
FIG. 2 is a schematic view of the structure of the apparatus according to example 1;
FIG. 3 is a schematic view of the structure of an apparatus according to embodiment 2;
FIG. 4 is a partial enlarged view of the indicating needle of the rotary disk of the embodiments 1 and 2;
fig. 5 is a partially enlarged view of the track plate of embodiment 2;
the device comprises a fixing plate 1, a fixing device 2, a rotary disc 3, scales 4, a track plate 5, a pointer 6 and a track button 7.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced in the background art, the problems that the currently adopted protractor is inconvenient to fix and read when measuring the knee joint mobility, needs two persons to complete the measurement and has large workload are solved. Therefore, the utility model provides a simple and easy measuring device of knee joint activity degree, include: a shank fixing plate, a thigh fixing plate and a turntable; the thigh fixing plate is fixedly connected with the rotary table, the shank fixing plate is movably connected with the rotary table, the shank fixing plate can rotate anticlockwise along the shaft of the rotary table, the rotary table is cylindrical, scales are arranged on the cylindrical surface of the rotary table, an L-shaped pointer is arranged on the upper surface of the rotary table, the rotation angle of the L-shaped pointer is consistent with that of the shank fixing plate all the time, one section of the L-shaped pointer is parallel to the radius of the rotary table, and the other section of the L-shaped pointer is parallel to the axis of the cylindrical surface of the rotary table.
In the application, the pointer is directly fixed on the lower disc body of the turntable and is ensured to be upward when the turntable is used; only plays an indicating role and does not rotate along with the turntable.
In some embodiments, fixing devices are arranged on the shank fixing plate and the thigh fixing plate to fix the shank and the thigh to the fixing plates, so that the rotation amplitudes of the shank and the thigh fixing plate are consistent (the thigh fixing plate and the thigh fixing plate are consistent and do not rotate), and the accuracy of the measurement result is ensured.
The specific type of the fixing device is not particularly limited in the present application, as long as the rotation amplitude of the lower leg and the fixing plate is consistent. Thus, in some embodiments, the fastening device is a strap, a fastener, a tape, or a ferrule, which facilitates binding and installation, and saves costs.
In order to improve the fixing effect of the fixing device, the deviation between the fixing plate and the shank/thigh in the rotating process is reduced. Thus, in some embodiments, the fixtures are arranged in groups, equally spaced apart.
The knee joint mobility is generally 0-130 degrees in flexion and extension, so in some embodiments, the angle at which the lower leg fixing plate can rotate along the turntable is 0-180 degrees, so as to fully meet the knee joint mobility measurement requirements of patients with different conditions at different stages.
The specific structure of the turntable is not specially limited, and the requirement for rotation can be met. Therefore, in some embodiments, the turntable is divided into an upper turntable body and a lower turntable body, the upper turntable body is connected with the lower turntable body through a shaft at the center of a circle, when the turntable is used, the upper turntable body can rotate around the shaft under the condition that the lower turntable body is not moved, and meanwhile, the turntable is simple to install and manufacture.
In some embodiments, the lower leg fixing plate is fixedly connected with the upper disc body, and the upper leg fixing plate is fixedly connected with the lower disc body.
The use of the patient is convenient, and the rotation amplitude of the shank fixing plate is consistent with that of the shank; in some embodiments, the length of the lower leg fixation plate is: 10-15cm, width: 5 cm; not only can keep higher consistency of the rotation amplitude of the crus fixing plate and the crus, but also can save materials and reduce cost.
In order to facilitate the use of the patient and to make the thigh fixing plate closely fit to the thigh, in some embodiments, the length of the thigh fixing plate is: 10-12cm, width: 5-8cm, not only the joint is tight, but also the material is saved.
In order to better simulate the movement of the knee joint, the rotation of the turntable and the swing of the lower leg are consistent as much as possible, so that in some embodiments, the radius of the turntable is 5cm, and the height of the turntable is 2-3cm, so as to improve the detection accuracy.
In some embodiments, in order to increase the accuracy of the measuring device during actual use, the calf portion is modified to a two-part design, a calf fixing plate and calf rail device respectively; preferably, the shank rail device is a rail plate, the shank fixing plate is movably connected with the turntable, the shank movable rail is movably connected with the turntable, and the turntable scale pointer is arranged on the shank movable rail. The track plate can display the degree, is connected with the pointer and can move up and down along with the flexion and extension movement of the knee joint.
Wherein, shank rail set overlaps with shank fixed plate and places (parallel arrangement), connects from top to bottom (connect through the knob), length: 10-15cm, width: 5 cm.
In some embodiments, the knob can also be a bolt and nut to effect the connection of the lower leg fixation plate of the lower leg rail device.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; the thigh fixing plate is fixedly connected with the rotary table 3, the shank fixing plate 1 is movably connected with the rotary table 3, the shank fixing plate 1 can rotate anticlockwise along a shaft 3 of the rotary table 1, the rotary table 3 is cylindrical, scales 4 are arranged on a cylindrical surface of the rotary table 3, an L-shaped pointer 6 is arranged on the upper surface of the rotary table 3, the L-shaped pointer 6 is fixedly connected with the shank fixing plate 1, one section of the L-shaped pointer 6 is parallel to the radius of the rotary table, and the other section of the L-shaped pointer is parallel to the axis of the cylindrical surface of the rotary table 3.
When the device is used, the thigh fixing plate is fixed on a thigh, the position of the rotary table is adjusted to be aligned with the knee joint, and the position of the pointer is adjusted to be upward; then, the shank fixing plate is fixed on the shank, the measurement is started, and after the patient swings to a preset position each time, the corresponding reading is recorded.
Example 2:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; the thigh fixing plate is fixedly connected with the rotary plate 3, the shank fixing plate 1 is movably connected with the rotary plate 3, the shank fixing plate 1 can rotate anticlockwise along a shaft 3 of the rotary plate 1, the rotary plate 3 is cylindrical, scales 4 are arranged on a cylindrical surface of the rotary plate 3, an L-shaped pointer 6 is arranged on the upper surface of the rotary plate 3, the rotation angle of the L-shaped pointer 6 is consistent with that of the shank fixing plate 1 all the time, one section of the L-shaped pointer 6 is parallel to the radius of the rotary plate, and the other section of the L-shaped pointer is parallel to the axis of the cylindrical surface of the rotary plate 3.
In the embodiment, in order to increase the accuracy of the measuring device in the actual use process, the lower leg part is changed into two parts, namely a lower leg fixing plate 1 and a lower leg rail device 5; the shank track device 5 is a track plate, the shank fixing plate 1 is movably connected with the rotary table 3, the shank movable track 1 is movably connected with the rotary table 3, and the rotary table scale pointer 6 is arranged on the shank movable track 5. The track plate 5 can display degrees, is connected with the pointer 6 and can move up and down along with the flexion and extension movement of the knee joint.
Shank rail set 5 overlaps with shank fixed plate 1 and places (parallel arrangement), connects from top to bottom (connect through the knob), length: 10-15cm, width: 5 cm.
The round button 7 adopts a bolt and a nut to realize the connection of the shank fixing plate of the shank rail device.
Example 3:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
In this embodiment, the fixing devices 2 are disposed on the shank fixing plate 1 and the thigh fixing plate to fix the shank and the thigh to the fixing plates, so that the rotation amplitudes of the shank and the thigh fixing plate are consistent (the thigh fixing plate and the thigh are consistent and do not rotate), and the accuracy of the measurement result is ensured.
Example 4:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
The specific type of the fixing device 2 is not particularly limited in the present application, as long as the rotation amplitude of the lower leg and the fixing plate 1 is consistent. Therefore, in the present embodiment, the fixing device 2 is a binding band, a fixing buckle, an adhesive tape or a sleeve, so as to facilitate binding and installation, and save cost.
Example 5:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
In order to improve the fixing effect of the fixing device, the deviation of the fixing plate 1 and the shank in the rotating process is reduced. Thus, in this embodiment, the fixing means 2 are provided in a plurality of groups, equally spaced apart.
Example 6:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
The knee joint mobility is generally 0 to 130 degrees in flexion and extension, so in this embodiment, the angle at which the lower leg fixing plate 1 can rotate along the turntable 3 is 0 to 180 degrees, so as to fully meet the knee joint mobility measurement requirements of patients in different conditions at different stages.
Example 7:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
The specific structure of the turntable 3 is not particularly limited in the present application as long as the rotation requirement can be satisfied. Therefore, in this embodiment, the turntable is divided into an upper turntable body and a lower turntable body, the upper turntable body is connected with the lower turntable body through a shaft at the center of a circle, when the turntable is used, the upper turntable body can rotate around the shaft under the condition that the lower turntable body is not moved, and meanwhile, the turntable is simple to mount and manufacture.
Example 8:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
In this embodiment, the lower leg fixing plate 1 is fixedly connected to the upper plate, and the upper leg fixing plate is fixedly connected to the lower plate.
Example 9:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
The use of the patient is convenient, and the rotation amplitude of the shank fixing plate 1 is consistent with that of the shank; in the present embodiment, the length of the lower leg fixing plate 1: 10-15cm, width: 5 cm; not only can keep higher consistency of the rotation amplitude of the crus fixing plate 1 and the crus, but also can save materials and reduce cost.
Example 10:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
In order to facilitate the use of the patient and to make the thigh fixing plate and the thigh tightly fit, in this embodiment, the length of the thigh fixing plate is: 10-12cm, width: 5-8cm, not only the joint is tight, but also the material is saved.
Example 11:
a simple knee joint mobility measuring device comprises: a shank fixing plate 1, a thigh fixing plate and a turntable 3; thigh fixed plate and carousel 3 fixed connection, the swing joint of shank fixed plate 1 and carousel 3, shank fixed plate 1 can follow the 3 anticlockwise rotations of the axle of carousel 1, carousel 3 is cylindrical, be provided with scale 4 on the cylindrical surface of carousel 3, the upper surface of carousel 3 is provided with L type pointer 6, the turned angle of L type pointer 6 is unanimous all the time with the turned angle of shank track board, L type pointer 6 is parallel with the radius of carousel for one section, and the axis of the cylindrical surface of carousel 3 is parallel for another section.
In order to better simulate the movement of the knee joint, the rotation of the turntable and the swing of the lower leg are consistent as much as possible, therefore, in the embodiment, the radius of the turntable is 5cm, and the height of the turntable is 2-3cm, so as to improve the detection accuracy.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments can be modified or partially replaced by equivalent solutions. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (10)
1. The utility model provides a simple and easy measuring device of knee joint mobility which characterized in that includes: a shank fixing plate, a thigh fixing plate and a turntable; the thigh fixing plate is fixedly connected with the rotary table, the shank fixing plate is movably connected with the rotary table, the shank fixing plate can rotate anticlockwise along the shaft of the rotary table, the rotary table is cylindrical, scales are arranged on the cylindrical surface of the rotary table, an L-shaped pointer is arranged on the upper surface of the rotary table, the rotation angle of the L-shaped pointer is consistent with that of the shank fixing plate all the time, one section of the L-shaped pointer is parallel to the radius of the rotary table, and the other section of the L-shaped pointer is parallel to the axis of the cylindrical surface of the rotary table.
2. The apparatus for measuring knee joint mobility according to claim 1, wherein the fixing means are provided on the shank fixing plate and the thigh fixing plate.
3. The easy knee joint mobility measurement device of claim 2, wherein the fixing device is a strap, a fixing buckle, an adhesive tape or a ferrule.
4. The device for easily measuring the degree of knee joint mobility according to claim 2, wherein the fixing means are provided in a plurality of groups, equally spaced apart.
5. The device for easily measuring the knee joint mobility according to claim 1, wherein the angle at which the lower leg fixing plate can rotate along the turntable is 0-90 °.
6. The apparatus as claimed in claim 1, wherein the turntable is divided into an upper and a lower plate, and the upper and the lower plate are connected by a shaft at the center of the circle.
7. The simple knee joint mobility measuring device of claim 6, wherein the lower leg fixing plate is fixedly connected with the upper plate body, and the upper leg fixing plate is fixedly connected with the lower plate body.
8. The easy knee joint mobility measuring device of claim 1, wherein the length of the lower leg fixing plate is: 10-15cm, width: 5 cm;
or the length of the thigh plate: 10-12cm, width: 5-8 cm;
or the radius of the turntable is 5cm, and the height of the turntable is 2-3 cm.
9. The device for measuring knee joint mobility according to claim 1, wherein the lower leg fixing plate is further provided with a lower leg rail device, and the lower leg rail device are arranged in parallel and connected up and down.
10. The device for measuring knee joint mobility in a simple manner as claimed in claim 1, wherein the lower leg fixing plate is connected to the lower leg rail device by a round button, and the round button comprises: a bolt and a nut.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020327019.8U CN211962047U (en) | 2020-03-16 | 2020-03-16 | Simple measuring device for knee joint mobility |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020327019.8U CN211962047U (en) | 2020-03-16 | 2020-03-16 | Simple measuring device for knee joint mobility |
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| CN211962047U true CN211962047U (en) | 2020-11-20 |
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| CN202020327019.8U Active CN211962047U (en) | 2020-03-16 | 2020-03-16 | Simple measuring device for knee joint mobility |
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