Smart joint activity meter for non-invasive diagnosis

Abstract

The application discloses an intelligent joint activity measurer for noninvasive diagnosis, which comprises a first fixing plate and a second fixing plate, one of which is used for limiting a small arm and the other of which is used for limiting a large arm, a sliding piece, a measuring mechanism and an indicating assembly, the sliding piece being slidingly connected to the first fixing plate, the measuring mechanism comprising a rotating shaft, the rotating shaft being fixed to the second fixing plate and being rotatably connected to the sliding piece, and the indicating assembly being used for indicating the angle of rotation of the rotating shaft around the sliding piece. The intelligent joint activity measurer for noninvasive diagnosis can drive the second fixing plate and the rotating shaft to rotate around the sliding piece when a user performs flexion and extension movement, and meanwhile the sliding piece can slide on the first fixing plate. Through the sliding piece, the angle of the elbow joint can be automatically adapted, and through the indicating assembly, the angle of rotation of the rotating shaft around the sliding piece can be read, and then the angle of the elbow joint activity of the user can be read.

Description

Technical Field

[0001] This invention relates to the field of joint measurement technology, and more specifically to an intelligent joint motion measuring device for non-invasive diagnosis. Background Technology

[0002] A joint is composed of articular cartilage, a joint capsule, ligaments, muscles, and synovial fluid. These structures work together in a coordinated manner to allow bones to move smoothly within the joint and to provide stability and protection. Joint health is crucial for normal bodily function and movement. When a joint is injured, it is generally necessary to measure the joint's range of motion.

[0003] For example, the authorized patent with authorization announcement number CN113576723B, authorization announcement date May 20, 2022, and titled "An Experimental Platform for Measuring Elbow Joint Flexion-Extension Stiffness," includes a base plate and an upper arm fixing unit, a forearm fixing unit, and a driving force unit disposed on the base plate. The upper arm fixing unit fixes the upper arm, and the forearm fixing unit fixes the forearm, with the upper arm fixing unit and the forearm fixing unit arranged at an angle. This invention solves the problems of stiffness measurement involving the forearm's own weight and the inability to bend in two directions.

[0004] In existing technologies, when measuring the range of motion of the elbow joint, it is generally necessary to align the rotation center of the elbow joint with the rotation center of the measuring mechanism for accurate measurement and diagnosis. Obviously, workers or medical personnel need to fix the elbow joint in the position corresponding to the measuring mechanism, or adjust the measuring mechanism to the position corresponding to the elbow joint. When fixing the joint, the existing measuring mechanism cannot intelligently adjust according to the condition of the elbow joint being measured. If the operation is improper and the joint position of the being measured is forcibly adjusted, it may cause secondary injury to the being measured. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent joint motion measuring device for non-invasive diagnosis, thereby addressing the aforementioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A smart joint motion measuring device for non-invasive diagnosis includes a first fixation plate and a second fixation plate, one of which is used to limit the forearm and the other to limit the upper arm. It also includes:

[0008] A sliding element, which is slidably connected to the first fixed plate;

[0009] A measuring mechanism includes a rotating shaft fixed to a second fixed plate and rotatably connected to a sliding member;

[0010] An indicator component is used to indicate the angle of rotation of the rotating shaft about the slider.

[0011] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis includes a second fixing plate comprising a sleeve plate and an inner plate, wherein the inner plate is slidably connected to the sleeve plate, and the rotating shaft is fixed to the sleeve plate.

[0012] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis includes an indicating component comprising a dial fixed to a slider and an indicating needle fixed to a rotating shaft.

[0013] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis has a first auxiliary needle and a second auxiliary needle rotatably connected to the rotating shaft.

[0014] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis includes a locking cylinder on the sliding member, the locking cylinder being hollow inside and having an opening on one side adapted to an indicator needle, and a locking groove adapted to the locking cylinder on the rotating shaft.

[0015] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis has a first inclined surface and a second inclined surface at one end of the snap-fit ​​cylinder near the rotating shaft, both of which are connected to the inner wall of the opening.

[0016] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis has a connecting rod fixed to one side of the snap-fit ​​cylinder, a brake block movably connected to the sliding member, a third inclined surface on the brake block, and an arc-shaped surface at the end of the connecting rod.

[0017] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis includes a movable block on the sliding member, two wedge-shaped blocks symmetrically arranged on the side of the movable block near the rotation axis, and an elastic element between the wedge-shaped blocks and the movable block.

[0018] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis also includes a drive assembly for driving the snap-fit ​​cylinder and the movable block to move in the opposite direction.

[0019] The aforementioned intelligent joint motion measuring device for non-invasive diagnosis includes a drive assembly comprising a screw rotatably connected to a sliding member, the screw being threadedly connected to a movable block, a first rack being constructed on the inner wall of the snap-fit ​​cylinder, a second rack being constructed on the outer wall of the movable block, and a gear being rotatably connected to the sliding member, wherein both the first rack and the second rack mesh with the gear.

[0020] In the above technical solution, the intelligent joint motion measuring device for non-invasive diagnosis provided by the present invention can fix the user's upper arm and forearm respectively through the first fixing plate and the second fixing plate. At this time, the upper arm and forearm are basically parallel to the corresponding fixing plate, that is, the angle formed between the first fixing plate and the second fixing plate is basically equal to the angle formed between the upper arm and the forearm. Then, the user performs flexion and extension movements, thereby driving the second fixing plate and the rotating shaft to rotate around the sliding member. At the same time, the sliding member can slide on the first fixing plate. With this setting, the user only needs to place the elbow joint in the appropriate area to fix the upper arm and forearm. When the user performs flexion and extension movements, the sliding member can automatically adapt to the angle of the elbow joint. At the same time, the angle of rotation of the rotating shaft around the sliding member can be read through the indicator component, thereby reading the angle of the user's elbow joint movement. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the sliding component structure provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the indicator component structure provided in an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of the snap-fit ​​cylinder and the sliding member provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the snap-fit ​​cylinder structure provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the brake block structure provided in an embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of the movable block and the snap-fit ​​cylinder provided in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. First fixed plate; 2. Second fixed plate; 3. Sliding component; 4. Rotating shaft; 5. Sleeve plate; 6. Inner plate; 7. First arc-shaped plate; 8. Second arc-shaped plate; 9. Limiting block; 10. Dial; 101. Bending dial; 102. Extending dial; 11. Indicator needle; 12. First auxiliary needle; 13. Second auxiliary needle; 14. Arc-shaped slider; 15. Snap-fit ​​cylinder; 151. Opening; 152. First inclined surface; 153. Second inclined surface; 16. Snap-fit ​​groove; 17. Connecting rod; 18. Braking block; 19. Elastic telescopic rod; 20. Movable block; 21. Wedge block; 22. Return spring; 23. Screw; 24. First rack; 25. Second rack; 26. Gear. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Reference Figure 1-7 This invention provides an intelligent joint motion measuring device for non-invasive diagnosis, including a first fixing plate 1 and a second fixing plate 2. One of the first fixing plate 1 and the second fixing plate 2 is used to limit the forearm, and the other is used to limit the upper arm. It also includes a slider 3, a measuring mechanism, and an indicating component. The slider 3 is slidably connected to the first fixing plate 1. The measuring mechanism includes a rotating shaft 4, which is fixed to the second fixing plate 2 and is rotatably connected to the slider 3. The indicating component is used to indicate the angle of rotation of the rotating shaft 4 around the slider 3.

[0033] Specifically, one of the first fixing plate 1 and the second fixing plate 2 is used to limit the forearm, and the other is used to limit the upper arm. When measuring a user, the upper arm is generally kept stationary while the forearm rotates to determine the elbow joint's angle of motion. That is, the first fixing plate 1 remains stationary (it can be fixed to a platform such as a desktop), and the second fixing plate 2 rotates to read the rotation angle. The sliding member 3 is slidably connected to the first fixing plate 1 via a guide rod. Preferably, the first fixing plate 1 has a groove along its length, and the sliding member 3 is slidably connected within the groove. The first fixing plate 1 can be used to fix the user's upper arm with a strap (not shown). The innovation of this invention lies in fixing the user's upper arm and forearm with the first fixing plate 1 and the second fixing plate 2 respectively. At this time, the upper arm and forearm are basically parallel to the corresponding fixing plate, and the position of the elbow joint is basically determined. That is, the angle formed between the first fixing plate 1 and the second fixing plate 2 is basically equal to the angle formed between the upper arm and the forearm (the angles formed by the two do not coincide). Thus, when the forearm drives the first fixing plate 1 or the second fixing plate 2 to move actively, the intersection point of the first fixing plate 1 and the second fixing plate 2 (that is, the position of the sliding member 3) will change accordingly to ensure that the angle formed between the first fixing plate 1 and the second fixing plate 2 is equal to the angle formed between the upper arm and the forearm. With this setup, the user only needs to place their elbow in the appropriate area to fix the upper and lower arm. When the user performs flexion and extension movements, the sliding member 3 slides on the first fixed plate 1 to automatically adapt to the angle of the elbow joint. At the same time, the angle of rotation of the rotating shaft 4 around the sliding member 3 can be read through the indicator component (the indicator component can be an electronic angle ruler in the prior art, with the two movable plates of the electronic angle ruler fixed on the sliding member 3 and the rotating shaft 4 respectively, so that when the rotating shaft 4 rotates around the sliding member 3, the angle of rotation is displayed on the electronic screen at the connection of the two movable plates. This is prior art and can be directly applied). Thus, the angle of the user's elbow joint movement can be read.

[0034] The intelligent joint motion measuring device for non-invasive diagnosis provided in this embodiment of the invention can fix the user's upper arm and forearm respectively through the first fixing plate 1 and the second fixing plate 2. At this time, the upper arm and forearm are basically parallel to the corresponding fixing plates, that is, the angle formed between the first fixing plate 1 and the second fixing plate 2 is basically equal to the angle formed between the upper arm and forearm. Then, the user performs flexion and extension movements, thereby driving the second fixing plate 2 and the rotating shaft 4 to rotate around the sliding member 3. At the same time, the sliding member 3 can slide on the first fixing plate 1. With this setting, the user only needs to place the elbow joint in the appropriate area to fix the upper arm and forearm. When the user performs flexion and extension movements, the sliding member 3 can automatically adapt to the angle of the elbow joint. At the same time, the angle of rotation of the rotating shaft 4 around the sliding member 3 can be read through the indicator component, thereby reading the angle of the user's elbow joint movement.

[0035] As those skilled in the art will understand, the first fixing plate 1 can be used to fix the upper arm or the forearm, and the sliding member 3 is slidably connected to the first fixing plate 1. That is, the sliding member 3 can slide on the side of the upper arm or the side of the forearm. Both methods can achieve the above-mentioned effect. The corresponding measuring mechanism is also the same. This is an implementation method that those skilled in the art can think of. Thus, by simply describing the implementation method in which the sliding member 3 slides on the side of the upper arm, those skilled in the art can think of the implementation method in which the sliding member 3 slides on the side of the forearm.

[0036] In another embodiment of the present invention, the second fixing plate 2 further includes a sleeve plate 5 and an inner plate 6, wherein the inner plate 6 is slidably connected to the sleeve plate 5, and the rotating shaft 4 is fixed to the sleeve plate 5. Specifically, the sleeve plate 5 has a movable groove for the inner plate 6 to slide in, and a first arc-shaped plate 7 and a second arc-shaped plate 8 are fixed on the inner plate 6. Both the first arc-shaped plate 7 and the second arc-shaped plate 8 are provided with straps for fixing the user's forearm. A limiting block 9 is fixed on the inner plate 6, and the limiting block 9 is used to engage the edge of the second arc-shaped plate 8, so that the second arc-shaped plate 8 can rotate relative to the limiting block 9 (the second arc-shaped plate 8 rotates around its own center). The purpose of this design is that when the user's upper and lower arms are fixed and flexion and extension movements are performed, the inner plate 6 moves synchronously with the lower arm. Since the slider 3 needs to slide on the first fixed plate 1, that is, the positions of the sleeve 5 and the rotating shaft 4 need to move together with the slider 3. At this time, the inner plate 6 can move within the movable groove to adapt to the position of the slider 3 (for example, when the elbow joint is flexed, the angle between the upper arm and the lower arm becomes smaller, at which time the slider 3 will move away from the inner plate 6, and the inner plate 6 can move within the movable groove to adapt to the position of the slider 3). (Change of position) to minimize friction between the forearm and the first fixing plate 1, which could cause injury to the user; the limiting block 9 also allows the user to perform pronation and supination movements after the forearm is fixed (pronation and supination movements only require the front end of the forearm to rotate relative to the rear end of the forearm, that is, the first arc plate 7 and the second arc plate 8 to rotate relative to each other. Preferably, a pointer can be set on the limiting block 9, and a scale can be set on the edge of the second arc plate 8, so as to read the angle of movement when the elbow joint pronates or supinates. This is the prior art and is not shown).

[0037] Furthermore, the indicating component includes a dial 10 fixed to the slider 3 and an indicator needle 11 fixed to the rotating shaft 4. Specifically, the dial 10 consists of a flexed dial 101 and an extended dial 102, with the connection point between the flexed and extended dials being their zero-gradient position (i.e., the position of the indicator needle 11 when the first fixed plate 1 and the second fixed plate 2 are at a 180-degree angle). This arrangement allows the user to read the angles of movement in both flexion and extension states using the flexed and extended dials 101 and 102 respectively, without requiring further calculations.

[0038] Furthermore, a first auxiliary needle 12 and a second auxiliary needle 13 are rotatably connected to the rotating shaft 4. Specifically, the rotating shaft 4 has an annular groove. The first auxiliary needle 12 and the second auxiliary needle 13 are both connected to the annular groove through an arc-shaped slider 14. The outer wall of the arc-shaped slider 14 is provided with a rubber layer (coated or vulcanized), that is, there is a certain friction between the arc-shaped slider 14 and the annular groove. The positions of the first auxiliary needle 12 and the second auxiliary needle 13 in the annular groove are not easily changed. The first auxiliary needle 12 and the second auxiliary needle 13 are both in contact with the indicator needle 11, and when the three are in contact, they point to the same scale. The purpose of this setup is that when the first fixed plate 1 and the second fixed plate 2 are at 180 degrees apart, the indicator needle 11, the first auxiliary needle 12, and the second auxiliary needle 13 all point to the zero mark. When the user performs a flexion movement, the indicator needle 11 can squeeze the first auxiliary needle 12 and drive the corresponding arc-shaped slider 14 to move in the annular groove until the user reaches the limit of the flexion movement. At this time, the mark pointed to by the first auxiliary needle 12 is the limit of the user's flexion movement. Then the user can continue to perform extension movements. In this way, the user's elbow joint flexion and extension movement angles can be recorded by the first auxiliary needle 12 and the second auxiliary needle 13.

[0039] In another embodiment of the present invention, the sliding member 3 is further provided with a snap-fit ​​cylinder 15. The snap-fit ​​cylinder 15 is hollow inside and has an opening 151 on one side that is adapted to the indicator needle 11. The opening 151 makes the radial cross-section of the snap-fit ​​cylinder 15 C-shaped. The rotating shaft 4 is provided with a snap-fit ​​groove 16 adapted to the snap-fit ​​cylinder 15. Specifically, the sliding member 3 has an extension on one side, and a C-shaped groove adapted to the snap-fit ​​cylinder 15 is constructed in the extension, so that the snap-fit ​​cylinder 15 can move in the C-shaped groove of the extension. The snap-fit ​​cylinder 15 is hollow tubular in shape and is coaxially arranged with the rotating shaft 4. The opening 151 of the snap-fit ​​cylinder 15 is constructed at a position corresponding to the zero mark. Corresponding to the opening 151, the snap-fit ​​groove 16 is C-shaped in shape. The purpose of this setting is that, after measuring the user's elbow joint range of motion, the angle between the first fixing plate 1 and the second fixing plate 2 is first adjusted to 180 degrees so that the locking tube 15 and the locking groove 16 correspond. Then, the locking tube 15 is inserted into the locking groove 16, thereby restricting the rotation shaft 4 through the locking tube 15 in the extension, so as to restrict the second fixing plate 2 and the rotation shaft 4 from rotating relative to the sliding member 3, making it convenient to store the device.

[0040] Furthermore, the end of the snap-fit ​​cylinder 15 near the rotating shaft 4 is constructed with a first inclined surface 152 and a second inclined surface 153, both of which are connected to the inner wall of the opening 151. Specifically, the first inclined surface 152 and the second inclined surface 153 are smoothly connected, and the connection point is located between the 180-degree position of the bent scale 101 and the position of the maximum angle of the extended scale 102 (it can be located at the 180-degree position of the bent scale 101, in which case the first inclined surface 152 and the second inclined surface 153 are symmetrically arranged, such as...). Figure 5As shown), the connection between the two is closer to the snap-fit ​​groove 16 than the opening 151 (this ensures that the connection between the two enters the snap-fit ​​groove 16 first); the annular groove is located on the inner wall of the snap-fit ​​groove 16 (that is, the diameter of the snap-fit ​​groove 16 is larger than the diameter of the annular groove). The purpose of this design is that, after measuring the user's elbow joint range of motion, the angle indicated by the first auxiliary pin 12 and the second auxiliary pin 13 is the user's elbow joint range of motion. Then, the locking cylinder 15 is inserted into the locking groove 16. At this time, the first inclined surface 152 and the second inclined surface 153 can successively abut against the first auxiliary pin 12 and the second auxiliary pin 13 (the flexion and extension angles of a normal person's elbow joint will not reach 180 degrees, that is, the first auxiliary pin 12 and the second auxiliary pin 13 will not rotate to the position where the first inclined surface 152 and the second inclined surface 153 connect, so when the connection of the first inclined surface 152 and the second inclined surface 153 enters the locking groove 16 first, the first auxiliary pin 12 and the second auxiliary pin 13 can be abutted by the first inclined surface 152 and the second inclined surface 153), so that the first auxiliary pin 12 and the second auxiliary pin 13 rotate around the annular groove. Until the first auxiliary pin 12 and the second auxiliary pin 13 are brought into contact with the opening 151, during this process, the first auxiliary pin 12 or the second auxiliary pin 13 can also drive the indicator pin 11 to rotate together when they are in contact with the indicator pin 11. This causes the snap-fit ​​cylinder 15 to be inserted into the snap-fit ​​groove 16 and force the first auxiliary pin 12, the second auxiliary pin 13 and the indicator pin 11 to rotate together to the position of the opening 151. (When the first auxiliary pin 12, the second auxiliary pin 13 and the indicator pin 11 are in contact with each other, their overall width is the same as the width of the opening 151. Thus, the opening 151 forces the three to rotate to the zero mark position of the dial 10. At the same time, the second fixing plate 2 also rotates with the indicator pin 11 to a position 180 degrees from the first fixing plate 1. This position is convenient for storing the device.) In this way, the steps of adjusting the angle of the second fixing plate 2 and resetting the positions of the first auxiliary pin 12 and the second auxiliary pin 13 are omitted.

[0041] Furthermore, a connecting rod 17 is fixed to one side of the snap-fit ​​cylinder 15, and a brake block 18 is movably connected to the sliding member 3. The brake block 18 has a third inclined surface, and the end of the connecting rod 17 has an arc-shaped surface. Specifically, the connecting rod 17 is L-shaped, and the position of its arc-shaped surface corresponds to the position of the third inclined surface. An elastic telescopic rod 19 is fixed to the sliding member 3, and the end of the elastic telescopic rod 19 is fixed to the brake block 18, so that the brake block 18 can slide on the outer wall of the sliding member 3 through the elastic telescopic rod 19. The brake block 18 is located in the groove, and the side of the brake block 18 corresponding to the inner wall of the groove has a rough surface. The purpose of this arrangement is that when the snap-fit ​​cylinder 15 is inserted into the snap-fit ​​groove 16, the connecting rod 17 can move towards the side closer to the rotating shaft 4, that is, the arc-shaped surface of the connecting rod 17 approaches the position of the third inclined surface. When the snap-fit ​​cylinder 15 is fully inserted into the snap-fit ​​groove 16, the connecting rod 17 can abut against the third inclined surface through the arc-shaped surface and force the rough surface of the brake block 18 to abut against the inner wall of the slide groove. Thus, the relative position of the sliding member 3 and the slide groove is restricted by the brake block 18. That is, when the snap-fit ​​cylinder 15 is inserted into the snap-fit ​​groove 16, the relative positions of the first fixing plate 1 and the sliding member 3, as well as the relative positions of the sliding member 3 and the second fixing plate 2, are all restricted, thereby restricting the first fixing plate 1 and the second fixing plate 2 and storing them at 180 degrees.

[0042] Furthermore, the sliding member 3 is provided with a movable block 20, and two wedge-shaped blocks 21 are symmetrically arranged on the side of the movable block 20 near the rotating shaft 4. An elastic element is provided between the wedge-shaped blocks 21 and the movable block 20. Specifically, the movable block 20 is disposed within the extension of the sliding member 3 and is located within the snap-fit ​​cylinder 15. The movable block 20 has two symmetrically constructed telescopic grooves, and two wedge blocks 21 are respectively adapted to the two telescopic grooves. The elastic member is preferably a return spring 22, which is fixed to the inner wall of the telescopic groove and the end of the return spring 22 is fixed to the wedge block 21, thereby forcing the wedge block 21 away from the telescopic groove through the return spring 22. The inclined surfaces of the two wedge blocks 21 are located at the corner connecting the bottom surface and the mutually distant side surfaces. When the indicator needle 11 rotates with the rotating shaft 4, the indicator needle 11 can abut against the inclined surface of the wedge block 21 and force the wedge block 21 to retract into the telescopic groove, thereby moving the indicator needle 11 between the two wedge blocks 21. The two wedge blocks 21 can engage the indicator needle 11 at a 90-degree position on the bent scale 101. The purpose of this design is that after flexion and extension, the human elbow joint also needs to perform pronation and supination movements. This movement requires the user to rotate the forearm when the elbow joint is at 90 degrees. When the user needs to perform pronation and supination movements of the elbow joint, the movable block 20 is moved to the aforementioned working position (the position described above is the working position; a driving member can be provided on the slider 3 to drive the movable block 20 to move to or from the working position, which is prior art). When the movable block 20 is in the working position, the user can rotate the forearm. Until the indicator needle 11 presses against a wedge block 21 and engages between two wedge blocks 21 (regardless of the initial position of the forearm, simply rotate it towards a position close to 90 degrees, thereby causing the indicator needle 11 to press against a wedge block 21, and after the indicator needle 11 moves to the 90-degree position, the pressed wedge block 21 will be reset by the action of the return spring 22 and engage with the indicator needle 11 together with the other wedge block 21), the user's elbow joint is at 90 degrees in this position, which facilitates the pronation and supination of the elbow joint.

[0043] Furthermore, it also includes a drive assembly for driving the locking cylinder 15 and the movable block 20 to move in opposite directions. Specifically, the drive assembly can be a combination of a linkage rope and a linear drive structure. The locking cylinder 15 and the movable block 20 are fixed together by the linkage rope, and the locking cylinder 15 is driven to move linearly by the linear drive structure (the movable block 20 can also be driven to move linearly by the linear drive structure). When the locking cylinder 15 is driven to move towards the rotating shaft 4 by the linear drive structure, the linkage rope can pull the movable block 20 to move away from the rotating shaft 4, and vice versa. In this way, the locking cylinder 15 and the movable block 20 can be driven to move synchronously and in opposite directions. The advantage of this configuration is that when the locking cylinder 15 and the movable block 20 move in opposite directions via the drive assembly, the locking cylinder 15 and the movable block 20 have three states. First, the locking cylinder 15 and the movable block 20 are basically flush, and neither is in contact with the rotating shaft 4 or the indicator needle 11. The second fixing plate 2 can move or rotate freely on the first fixing plate 1, allowing the user to perform elbow flexion and extension movements in this state. Second, the movable block 20 moves towards the rotating shaft 4, and the corresponding locking cylinder 15 moves away from the rotating shaft 4. It stops when the movable block 20 drives the wedge block 21 to the working position. At this point, the two wedge blocks 21 on the movable block 20 can engage the indicator needle 11. When the elbow is engaged at 90 degrees on the flexion dial 101, the user can perform pronation and supination movements of the elbow joint. Thirdly, the locking cylinder 15 moves towards the rotation axis 4, and the corresponding movable block 20 moves away from the rotation axis 4 until the locking cylinder 15 is fully inserted into the locking groove 16. During this process, the locking cylinder 15 can restrict the relative positions of the first fixed plate 1 and the sliding member 3, as well as the relative positions of the sliding member 3 and the second fixed plate 2, so that the first fixed plate 1 and the second fixed plate 2 are housed at 180 degrees. At the same time, the locking cylinder 15 can also force the first auxiliary needle 12, the second auxiliary needle 13 and the indicator needle 11 to rotate together to the zero mark position of the dial 10, which is convenient for the next measurement of the elbow joint range of motion.

[0044] In another embodiment of the present invention, as an alternative to the above-mentioned linkage rope and linear drive structure, preferably, the drive assembly includes a screw 23 rotatably connected to the sliding member 3, the screw 23 being threadedly connected to the movable block 20, the inner wall of the snap-fit ​​cylinder 15 being constructed with a first rack 24, the outer wall of the movable block 20 being constructed with a second rack 25, and a gear 26 rotatably connected to the sliding member 3, wherein both the first rack 24 and the second rack 25 mesh with the gear 26. Specifically, a knob is fixed at the end of the screw 23 away from the rotating shaft 4. Rotating the knob can drive the screw 23 to rotate forward or backward. The sliding member 3 has a protrusion located between the movable block 20 and the locking cylinder 15. The gear 26 is rotatably connected to the protrusion. Since the first rack 24 and the second rack 25 are both meshed with the gear 26, and the position of the gear 26 on the protrusion remains unchanged (the gear 26 only rotates on the protrusion), the first rack 24 and the second rack 25 move synchronously and in opposite directions through the gear 26. That is, the locking cylinder 15 and the movable block 20 move synchronously and in opposite directions. With this setting, the position of the locking cylinder 15 and the movable block 20 can be controlled by rotating the knob, thereby restricting the rotating shaft 4 and the second fixed plate 2.

[0045] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An intelligent joint motion measuring device for non-invasive diagnosis, comprising a first fixation plate and a second fixation plate, wherein one of the first fixation plate and the second fixation plate is used to limit the forearm, and the other is used to limit the upper arm, characterized in that, Also includes: A sliding element, which is slidably connected to the first fixed plate; A measuring mechanism includes a rotating shaft fixed to a second fixed plate and rotatably connected to a sliding member; An indicator component for indicating the angle of rotation of the rotating shaft about the slider; The second fixing plate includes a sleeve plate and an inner plate, the inner plate being slidably connected to the sleeve plate, and the rotating shaft being fixed to the sleeve plate; The indicating component includes a dial fixed on a slider and an indicating needle fixed on a rotating shaft; the dial is divided into two parts: a flexed dial and an extended dial; The sliding member is provided with a snap-fit ​​cylinder, which is hollow inside and has an opening on one side that is adapted to the indicator needle. The rotating shaft is provided with a snap-fit ​​groove adapted to the snap-fit ​​cylinder. The sliding member has an extension on one side, and a C-shaped groove adapted to the snap-fit ​​cylinder is constructed in the extension, so that the snap-fit ​​cylinder can move in the C-shaped groove of the extension. The snap-fit ​​cylinder is hollow tubular in shape and is coaxial with the rotating shaft. The opening of the snap-fit ​​cylinder is located at the position corresponding to the zero mark. Corresponding to the opening, the snap-fit ​​groove is C-shaped in shape. The snap-fit ​​cylinder has a first inclined surface and a second inclined surface at one end near the rotating shaft. Both the first and second inclined surfaces are connected to the inner wall of the opening. The first and second inclined surfaces are smoothly connected, and the connection point is located between the 180-degree position of the bent dial and the position of the maximum angle of the extended dial.

2. The intelligent joint motion measuring device for non-invasive diagnosis according to claim 1, characterized in that, The rotating shaft is rotatably connected to a first auxiliary needle and a second auxiliary needle.

3. The intelligent joint motion measuring device for non-invasive diagnosis according to claim 1, characterized in that, A connecting rod is fixed to one side of the snap-fit ​​cylinder, a brake block is movably connected to the sliding member, a third inclined surface is constructed on the brake block, and an arc-shaped surface is constructed at the end of the connecting rod.

4. The intelligent joint motion measuring device for non-invasive diagnosis according to claim 1, characterized in that, The sliding member is provided with a movable block, and two wedge-shaped blocks are symmetrically arranged on the side of the movable block near the rotation axis. An elastic element is provided between the wedge-shaped blocks and the movable block.

5. The intelligent joint motion measuring device for non-invasive diagnosis according to claim 4, characterized in that, It also includes a drive component, which is used to drive the snap-fit ​​cylinder and the moving block to move in the opposite direction.

6. The intelligent joint motion measuring device for non-invasive diagnosis according to claim 5, characterized in that, The drive assembly includes a screw rotatably connected to a slider, the screw being threadedly connected to a movable block, a first rack being constructed on the inner wall of the snap-fit ​​cylinder, a second rack being constructed on the outer wall of the movable block, and a gear being rotatably connected to the slider, with both the first and second racks meshing with the gear.

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