Middle foot torsional rigidity measuring instrument

Abstract

The utility model discloses a middle foot torsional rigidity measuring instrument. The measuring instrument comprises a base; a supporting plane is formed on the upper surface of the heel supporting seat; a shank fixing bandage is arranged on the shank fixing plate; an overturning plate bracket; the turnover plate rotating shaft is rotatably arranged on the turnover plate bracket; the forefoot overturning plate is connected with the overturning plate rotating shaft, and a forefoot fixing bandage is arranged on the forefoot overturning plate; a handle bracket; the handle rotating shaft is rotatably arranged on the handle bracket; the rotating handle is arranged at the front end of the handle rotating shaft; the angle scale is arranged on the handle bracket; the pointer is arranged on the handle rotating shaft; and the handle rotating shaft and the turnover plate rotating shaft are connected through the torque sensor. According to the embodiment of the utility model, the measuring instrument for the torsional rigidity of the middle foot can measure the torsional rigidity of the middle foot and has the advantages of accurate measuring result and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sports human science technology, specifically, relate to a midfoot torsional rigidity measuring instrument. BACKGROUND

[0002] The foot is an important moving organ of the human body, and the wedge bone, cuboid bone, foot navicular bone and metatarsal bone of the midfoot form the medial and lateral longitudinal arches and the transverse arch of the foot, so that the foot can be cushioned and extended through the arch structure. During movement, foot torsion mainly occurs in the midfoot region of the tarsal transverse joint and the tarsometatarsal joint, and midfoot torsion refers to the relative rotational movement between the forefoot and the hindfoot in the frontal plane. This movement plays an important role in human walking, running and certain sports activities. Midfoot torsion not only helps to improve the efficiency of gait, but also provides the necessary flexibility and stability for the lower limb joints during rapid directional changes.

[0003] Some sports shoes increase the rigidity of the midfoot region by setting anti-torsion sheets to improve the anti-torsion performance of the shoes, but the coupling of the rigidity of the anti-torsion sheets and the midfoot torsional rigidity still lacks scientific data support.

[0004] In related technologies, the test equipment for foot movement is focused on the test of the movement of the foot arch in the sagittal plane, and lacks test equipment for midfoot torsion, resulting in a lack of sufficient data for midfoot torsional rigidity, making it difficult to quantify the research on foot torsion function and shoe anti-torsion design, and affecting the scientific nature of foot shoe research. UTILITY MODEL CONTENT

[0005] The utility model aims at solving one of the technical problems in the prior art. To this end, the utility model provides a midfoot torsional rigidity measuring instrument, which can measure midfoot torsional rigidity and has the advantages of accurate measurement results.

[0006] To achieve the above object, the midfoot torsional stiffness measuring instrument according to the first aspect of the utility model comprises: a base; a heel support seat, the heel support seat is equipped on the base, the upper surface of the heel support seat forms a support plane suitable for supporting a heel; a calf fixing plate, the calf fixing plate is equipped on the rear edge of the heel support seat and extends upwards, the calf fixing plate is equipped with a calf fixing bandage; a turnover plate support, the turnover plate support is equipped on the base and is located in front of the heel support seat; a turnover plate pivot, the turnover plate pivot is rotatably equipped on the turnover plate support and the rotating axis is oriented along the front and back directions; a forefoot turnover plate, the forefoot turnover plate is connected with the turnover plate pivot, the forefoot turnover plate is located between the heel support seat and the turnover plate support, the upper surface of the forefoot turnover plate is flush with the support plane when the forefoot turnover plate is located in a horizontal position, the forefoot turnover plate is equipped with a forefoot fixing bandage; a handle support, the handle support is equipped on the base and is located in front of the turnover plate support; a handle pivot, the handle pivot is rotatably equipped on the handle support and the rotating axis is oriented along the front and back directions; a rotating handle, the rotating handle is equipped on the front end of the handle pivot; a scale, the scale is equipped on the handle support, the scale is equipped with an angle scale; a pointer, the pointer is equipped on the handle pivot and is suitable for indicating the rotating angle of the forefoot turnover plate on the scale; a torque sensor, the handle pivot and the turnover plate pivot are connected through the torque sensor.

[0007] The midfoot torsional stiffness measuring instrument according to the utility model embodiment can measure the midfoot torsional stiffness and has the advantages of accurate measurement results.

[0008] In addition, the midfoot torsional stiffness measuring instrument according to the above embodiment of the utility model can also have the following additional technical features:

[0009] According to one embodiment of the utility model, the calf fixing plate is equipped with a calf bandage through slot, the calf fixing bandage passes through the calf bandage through slot, the forefoot turnover plate is equipped with a forefoot bandage through slot, and the forefoot fixing bandage passes through the forefoot bandage through slot.

[0010] According to one embodiment of the utility model, the calf fixing bandage and the forefoot fixing bandage are both equipped with magic tapes.

[0011] According to one embodiment of the utility model, the torque sensor has a range of 0-20 newton meters.

[0012] According to one embodiment of the utility model, the scale has a range of 180 degrees and an accuracy of 1 degree.

[0013] According to one embodiment of the present invention, the calf fixing plate is provided with a heel avoidance groove suitable for avoiding the heel.

[0014] According to an embodiment of the present invention, the rotating handle is constructed in the shape of a rod with a length direction perpendicular to the handle rotation axis.

[0015] According to one embodiment of the present invention, the midfoot torsional stiffness measuring instrument further includes a torque display device, which is electrically connected to the torque sensor and is suitable for displaying the detection value of the torque sensor.

[0016] According to one embodiment of the present invention, the base, heel support seat, calf fixing plate, flip plate bracket, forefoot flip plate and handle bracket are all made of aluminum alloy.

[0017] According to an embodiment of the present invention, the angle plate is made of a transparent material.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 3 is a schematic structural diagram of a midfoot torsional stiffness measuring instrument according to an embodiment of the present invention.

[0021] Figure numerals: midfoot torsional stiffness measuring instrument 1, base 10, heel support seat 20, support plane 21, calf fixing plate 30, calf strap slot 31, flip plate bracket 40, flip plate shaft 41, forefoot flip plate 50, forefoot strap slot 51, handle bracket 60, handle shaft 61, rotating handle 62, angle dial 70, pointer 80, torque sensor 90. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] The midfoot torsional stiffness measuring instrument 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the midfoot torsional stiffness measuring instrument 1 according to an embodiment of the present invention includes a base 10, a heel support seat 20, a calf fixing plate 30, a flip plate bracket 40, a flip plate shaft 41, a forefoot flip plate 50, a handle bracket 60, a handle shaft 61, a rotating handle 62, an angle plate 70, a pointer 80 and a torque sensor 90.

[0027] The heel support seat 20 is provided on the base 10 , and the upper surface of the heel support seat 20 forms a support plane 21 suitable for supporting the heel (the up-down and front-back directions are shown by arrows in the figure).

[0028] The calf fixing plate 30 is provided on the rear edge of the heel support seat 20 and extends upward. The calf fixing plate 30 is provided with a calf fixing strap (not shown in the figure).

[0029] The flip plate bracket 40 is disposed on the base 10 and located in front of the heel support 20 .

[0030] The flip plate rotation shaft 41 is rotatably provided on the flip plate bracket 40 and the rotation axis is oriented in the front-rear direction.

[0031] The forefoot turning plate 50 is connected with the turning plate pivot 41, and is located between the heel support seat 20 and the turning plate support 40. When the forefoot turning plate 50 is in a horizontal position, the upper surface thereof is flush with the support plane 21. The forefoot turning plate 50 is provided with a forefoot fixing band (not shown in the figure).

[0032] The handle support 60 is arranged on the base 10 and located in front of the turning plate support 40.

[0033] The handle pivot 61 is rotatably arranged on the handle support 60 and the rotation axis thereof is oriented in the front-rear direction.

[0034] The turning handle 62 is arranged at the front end of the handle pivot 61.

[0035] The angle disc 70 is arranged on the handle support 60, and the angle disc is provided with an angle scale.

[0036] The pointer 80 is arranged on the handle pivot 61 and is adapted to indicate the rotation angle of the forefoot turning plate 50 on the angle disc 70.

[0037] The handle pivot 61 and the turning plate pivot 41 are connected through the torque sensor 90.

[0038] Specifically, the forefoot turning plate 50 is adjusted to rotate to a horizontal position.

[0039] The heel of the subject is supported on the support plane 21 of the heel support seat 20, and the forefoot is supported on the forefoot turning plate 50. The lower leg of the subject is fixed with the lower leg fixing plate 30 by using the lower leg fixing band, and the forefoot of the subject is fixed with the forefoot turning plate 50 by using the forefoot fixing band.

[0040] The tester twists the turning handle 62 at a constant speed to the medial side or the lateral side of the foot, and the turning handle 62 drives the pointer 80, the turning plate pivot 41 and the forefoot turning plate 50 to rotate through the handle pivot 61, so as to twist the forefoot and the hindfoot of the subject around the sagittal axis in the midfoot region. When the subject's lower leg compensates or is in pain, the twisting is stopped, and the angle and the detection value of the torque sensor 90 are recorded every 5-10 degrees of twisting.

[0041] The curve is drawn with the angle as the horizontal axis and the torque as the vertical axis, and the average twisting stiffness and the maximum twisting angle are calculated.

[0042] The formula for calculating the foot twisting stiffness is: foot twisting stiffness = foot twisting torque / foot twisting angle.

[0043] For example, a plurality of subjects can be recruited for testing, each subject tested for a range of torque from 15° of eversion to 15° of inversion (eversion being negative and inversion being positive) for both feet in standing and sitting positions, and the average torsional stiffness of each subject calculated for 5° of inversion and eversion (-5° to 5°) to assess the difference in torsional stiffness of the feet in inversion and eversion and in standing and sitting positions.

[0044] According to the midfoot torsional stiffness measuring instrument 1 in the embodiments of the present application, the heel of the subject can be supported on the heel support seat 20, and the calf of the subject can be fixed to the calf fixing plate 30 by the calf fixing band, so that the calf and the heel of the subject are fixed, displacement during torsion is prevented, and the accuracy of the measurement result is improved.

[0045] In addition, the forefoot of the subject can be fixed to the forefoot turning plate 50 by the forefoot fixing band, and the forefoot turning plate 50 is further driven to rotate by the rotating handle 62, so that the forefoot of the subject is driven to rotate, and the forefoot and the hindfoot of the subject are twisted around the sagittal axis in the midfoot region.

[0046] In addition, the angle disc 70, the pointer 80 and the torque sensor 90 are provided, the pointer 80 can indicate the torsion angle on the angle disc 70 with the rotation of the handle shaft 61, and the torque sensor 90 can detect the torque during the torsion, so that the real-time detection of the foot torsion angle and the foot torsion torque can be realized, the foot torsional stiffness can be calculated, and the measurement of the midfoot torsional stiffness can be realized.

[0047] Therefore, the midfoot torsional stiffness measuring instrument 1 in the embodiments of the present application can measure the midfoot torsional stiffness, and has the advantages of accurate measurement result and the like.

[0048] The midfoot torsional stiffness measuring instrument 1 according to the embodiments of the present application is described below with reference to the accompanying drawings.

[0049] In some embodiments of the present application, as shown in Figure 1 The midfoot torsional stiffness measuring instrument 1 in the embodiments of the present application includes a base 10, a heel support seat 20, a calf fixing plate 30, a turning plate support 40, a turning plate shaft 41, a forefoot turning plate 50, a handle support 60, a handle shaft 61, a rotating handle 62, an angle disc 70, a pointer 80 and a torque sensor 90.

[0050] Specifically, as shown in Figure 1As shown in the drawings, the lower leg fixing plate 30 is provided with a lower leg bandage passing groove 31, and the lower leg fixing bandage passes through the lower leg bandage passing groove 31. The forefoot overturning plate 50 is provided with a forefoot bandage passing groove 51, and the forefoot fixing bandage passes through the forefoot bandage passing groove 51. In this way, the positioning of the bandage is facilitated, and the lower leg and the forefoot of the subject can be fixed by using the bandage.

[0051] More specifically, the lower leg fixing bandage and the forefoot fixing bandage are both provided with Velcro. In this way, the two ends of the bandage can be connected by Velcro, and the lower leg and the forefoot of the subject can be fixed.

[0052] Optionally, the torque sensor 90 has a range of 0-20 Nm. In this way, the torque sensor 90 has a reasonable range and accuracy, and the midfoot torsion torque can be detected.

[0053] Further, the range of the angle disc 70 is 180 degrees and the accuracy is 1 degree. In this way, the angle disc 70 has a reasonable range and accuracy, and the midfoot torsion angle can be detected.

[0054] Advantageously, the lower leg fixing plate 30 is provided with a heel avoiding groove (not shown in the drawings) adapted to avoid the heel. In this way, the subject's discomfort caused by the heel abutting against the lower leg fixing plate 30 can be avoided, and the subject can be more comfortable during measurement.

[0055] More advantageously, the rotating handle 62 is configured as a rod perpendicular to the handle rotating shaft 61 in the length direction (not shown in the drawings). In this way, the torque when the rotating handle 62 is rotated can be increased, and the forefoot overturning plate 50 and the forefoot of the subject can be twisted.

[0056] Further, the midfoot torsion stiffness measuring instrument 1 further comprises a torque display device (not shown in the drawings), which is electrically connected with the torque sensor 90 and is adapted to display the detection value of the torque sensor 90. In this way, the detection value of the torque sensor 90 can be observed in time, and reading and recording are facilitated.

[0057] Optionally, the base 10, the heel supporting seat 20, the lower leg fixing plate 30, the overturning plate support 40, the forefoot overturning plate 50 and the handle support 60 are all aluminum alloy pieces. Specifically, the base 10, the heel supporting seat 20, the lower leg fixing plate 30, the overturning plate support 40, the forefoot overturning plate 50 and the handle support 60 can be welded. In this way, the structural strength of the midfoot torsion stiffness measuring instrument 1 can be ensured.

[0058] Further, the angle disc 70 is a transparent material piece. In this way, the torsion angle can be observed.

[0059] The test results of the midfoot torsion stiffness measuring instrument 1 according to the embodiment of the present application on three subjects are described below.

[0060] The standing test results are shown in the table below. As the twist angle increases, the torque increases. During standing, the average stiffness of the left foot (-5° to 5°) was 0.17 ± 0.03 N·m / °, and that of the right foot was 0.13 ± 0.03 N·m / °. The average stiffness of the left forefoot during valgus was 0.10 ± 0.04 N·m / °, and the average stiffness during varus was 0.14 ± 0.03 N·m / °; the average stiffness of the right forefoot during valgus was 0.07 ± 0.03 N·m / °, and the average stiffness during varus was 0.12 ± 0.04 N·m / °.

[0061]

[0062] The results of the sitting test are shown in the table below. As the twist angle increases, the torque increases. During standing, the average stiffness of the left foot (-5° to 5°) was 0.09 ± 0.02 Nm / °, and that of the right foot was 0.08 ± 0.03 Nm / °. The average stiffness of the left forefoot during valgus was 0.05 ± 0.01 Nm / °, and the average stiffness during varus was 0.07 ± 0.02 Nm / °; the average stiffness of the right forefoot during valgus was 0.04 ± 0.01 Nm / °, and the average stiffness during varus was 0.06 ± 0.03 Nm / °.

[0063]

[0064]

[0065] Based on the test results, the study found that as the forefoot twist angle increases, the required torque increases, and the surface foot torsional stiffness does not change uniformly and linearly. Furthermore, the stiffness of the subject's foot when twisting inward is greater than when twisting outward, indicating that the torsional stiffness of the medial longitudinal arch is greater than that of the lateral longitudinal arch. Across different postures, standing exhibits greater arch stiffness than sitting, indicating that greater positive pressure increases the foot's torsional resistance, suggesting that appropriate loads may activate the foot muscles and thus improve the foot's torsional resistance.

[0066] Other structures and operations of the midfoot torsional stiffness measuring instrument 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0067] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A midfoot torsional stiffness measuring instrument, characterized in that: include: base; a heel support seat, the heel support seat being arranged on the base, the upper surface of the heel support seat forming a support plane suitable for supporting the heel; a calf fixing plate, the calf fixing plate being arranged at the rear edge of the heel support seat and extending upward, and the calf fixing strap being provided on the calf fixing plate; A flip plate bracket, the flip plate bracket is arranged on the base and located in front of the heel support seat; a flip plate rotating shaft, the flip plate rotating shaft being rotatably disposed on the flip plate bracket and having a rotation axis oriented in a front-to-back direction; a forefoot flip plate, the forefoot flip plate being connected to the flip plate rotating shaft, the forefoot flip plate being located between the heel support seat and the flip plate bracket, the upper surface of the forefoot flip plate being flush with the support plane when the forefoot flip plate is in a horizontal position, and the forefoot flip plate being provided with a forefoot fixing strap; a handle bracket, the handle bracket being arranged on the base and located in front of the flip plate bracket; a handle shaft, the handle shaft being rotatably disposed on the handle bracket and having a rotation axis oriented in a front-to-back direction; A rotating handle, the rotating handle being arranged at the front end of the handle shaft; An angle disc, the angle disc is arranged on the handle bracket, and the angle disc is provided with an angle scale; a pointer, the pointer being disposed on the handle shaft and being adapted to indicate the rotation angle of the forefoot flip plate on the angle disk; A torque sensor is provided, wherein the handle shaft and the flip plate shaft are connected to each other via the torque sensor.

2. The midfoot torsional stiffness measuring instrument according to claim 1, characterized in that: The calf fixing plate is provided with a calf strap passing groove, the calf fixing strap passes through the calf strap passing groove, and the forefoot flip plate is provided with a forefoot strap passing groove, the forefoot fixing strap passes through the forefoot strap passing groove.

3. The midfoot torsional stiffness measuring instrument according to claim 1, characterized in that: The calf fixing strap and the forefoot fixing strap are both provided with Velcro.

4. The midfoot torsional stiffness measuring instrument according to claim 1, characterized in that: The measuring range of the torque sensor is 0-20 Nm.

5. The midfoot torsional stiffness measuring instrument according to claim 1, characterized in that: The measuring range of the angle disc is 180 degrees and the accuracy is 1 degree.

6. The midfoot torsional stiffness measuring instrument according to claim 1, characterized in that: The calf fixing plate is provided with a heel avoidance groove suitable for avoiding the heel.

7. The midfoot torsional stiffness measuring instrument according to claim 1, wherein: The rotating handle is configured as a rod with a length direction perpendicular to the handle rotation axis.

8. The midfoot torsional stiffness measuring instrument according to claim 1, wherein: It also includes a torque display device, which is electrically connected to the torque sensor and is suitable for displaying the detection value of the torque sensor.

9. The midfoot torsional stiffness measuring instrument according to claim 1, wherein: The base, heel support seat, calf fixing plate, flip plate bracket, forefoot flip plate and handle bracket are all made of aluminum alloy.

10. The midfoot torsional stiffness measuring instrument according to claim 1, characterized in that: The angle plate is made of a transparent material.

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