TW201314188A - In shoe plantar pressure and shear force measuring device - Google Patents

Abstract

The present invention discloses an in shoe plantar pressure and shear force measuring device to be put inside shoes for measuring a pressure and shear force. The in shoe plantar pressure and shear force measuring device comprises a carrying plate and a copy element. The carrying plate is used to carry the plantar of a user and composed of a flexible material layer and a hard material layer. The flexible material layer has a first surface and a second surface which is opposite to the first surface. The first surface of the flexible material layer is used to carry the plantar of the user, and the hard material layer is disposed on the second surface. The copy element is disposed to face the hard material layer. Therefore, the flexible material layer receives a force of the plantar made by the user and delivers the force to the hard material layer to let the hard material layer press the copy element. The copy element will be pressed to print at least an image thereon according to the force.

Description

Foot sole shear strength measuring device that can be placed in a shoe

The invention relates to a foot-pressing force measuring device which can be placed in a shoe, in particular to a pressure-shearing force measuring device which combines a micro-hard structure, a carbon paper and a shoe to measure the pressure and shearing force of the user's foot.

When the human body walks, the pressure of the plantar is caused by the weight transfer to the lower limbs of the support. Studies have shown that the place where the greater plantar pressure occurs during walking is the heel and the first metatarsal and the second metatarsal or the big toe, and excessive foot pressure often leads to lesions in the foot.

According to statistics, at least 80% of people currently have foot problems. The injuries of the ankles and feet change the mechanics of the gait, which in turn affects the joints of other lower limbs, and may cause joints in related parts. That is to say, excessive foot pressure or shear force often leads to lesions in the foot, which may further cause lesions in other parts, such as diabetic foot ulcers, and severe cases are more likely to cause amputation.

For the existing plantar pressure measuring equipment on the market, it can be classified into three types, including transfer type foot pressure measuring equipment, modern electric foot pressure measuring equipment and optical foot pressure measuring equipment, among which The transfer-type plantar pressure measuring device records the maximum force behavior during the measurement period, such as the measurement of the pressure of the Harries Mat during the standing period of the bare foot; or the total pressure behavior formed by walking during a period of time, such as the Republic of China Patent No. I233338 A measurement of the plantar pressure test structure gain improvement. Modern electric foot pressure measurement equipment can also measure the pressure of bare feet or walking, but the cost is very high and the resolution is low (2~4 sensors/cm ² ), and only low-resolution pressure can't be used. The shear behavior was measured. The optical foot pressure measuring device can dynamically measure the bare foot pressure change (25 sensors/cm ² ) in a high-resolution manner, such as the full-pressure measuring device of the publication No. 201111760 of the Republic of China Patent Publication No. 201111760, and the measuring method thereof, and The shear force distribution can be derived from the mechanical analysis, but it cannot be placed in the shoe to measure the shearing force behavior when actually wearing the shoe.

Therefore, in order to understand the behavior of the foot pressing force after the foot is put on the shoe, it is necessary to develop a foot pressure that can be placed in the shoe to collect the basis for the evaluation of the influence of the shoe on the change of the foot pressing force. Cut the force measuring device.

Therefore, based on the foregoing, the present invention provides a plantar shear strength measuring device that can be placed in a shoe for being placed in a shoe for measurement of pressure and shear force.

The above-mentioned plantar shear strength measuring device comprises at least one bearing pad and a replication element. The carrier pad is used to carry a user's sole and has a soft material layer and a hard material layer. The layer of soft material carrying the pad has a first side and a second side opposite, the first side of which carries the sole of the user and the layer of hard material is disposed on the second side thereof. The replication element is facing the hard material layer. When the user puts on the shoe, the soft material layer receives a force applied by the user to the foot, and the soft material layer transfers the above force to the hard material layer to squeeze the hard material layer. The component is overwritten and at least one image corresponding to the above force is printed on the replication component.

In an embodiment of the invention, the soft material layer comprises a soft PU material or a silicone soft material.

In an embodiment of the invention, the hardness of the soft material layer measured by Shore A hardness is between 20 and 40 degrees.

In an embodiment of the invention, the hard material layer comprises a hard material capable of generating an indentation on the upper writing element, and the hardness of the hard material layer measured by Shore D hardness is between 70 degrees and 90 degrees. between.

In an embodiment of the invention, wherein the hard material layer comprises a plurality of cones, the cones are connected to the second side of the layer of soft material with their bottom surfaces, and the vertices of the plurality of cones face the replica element.

In an embodiment of the invention, the plurality of cones may be a cone and arranged on the second side of the layer of soft material at a distance interval.

In an embodiment of the invention, wherein said force comprises a sole pressure and a shear force.

In an embodiment of the invention, wherein the replication element is a carbonless copy paper.

In an embodiment of the invention, the carbonless copy paper comprises at least a first paper and a second paper, the first paper is provided with a developer, and the second paper is facing the hard material layer and is provided with a plurality of packages. Capsules of pigments.

In an embodiment of the invention, the method for measuring the plantar shear force comprises at least the following steps: First, the soft material layer receives the force applied by the user to the sole of the foot, and then the soft material layer transmits the force to the hard layer. Material layer. Then, the hard material layer receives the force and squeezes the second paper of the replication element to rupture the capsules on the second paper, when the pigment overflows from the broken capsules, and the color development on the first paper of the replication element The agent reacts to print an image.

The above and other objects, features, and advantages of the invention will be apparent from

Please refer to FIG. 1 for an embodiment. FIG. 1 is a cross-sectional view showing a foot-saw force measuring device according to a preferred embodiment of the present invention.

As shown in FIG. 1, the plantar shear strength measuring device 100 includes a carrier pad 1 and a replication element 2. In addition, although not shown, it should be noted that the plantar press force measuring device 100 provided by the present invention can be placed in a shoe, that is, the foot press force measuring device 100 is cut to conform to the shape and size of the insole in the shoe. Then, it can be inserted into the shoe as an insole to measure the pressure and shear distribution of the sole of the foot when the user is standing, walking, running or performing different exercises. As for the method of combining the foot-spinning force measuring device 100 with the original insole in the shoe, it is not intended to be limited, but in order to prevent the plantar pressure-measuring device 100 from sliding in the shoe, the measurement result is affected. An adhesive member (for example, devil felt or tape) may be added to the shoe to fix the plantar pressure measuring device 100 in the shoe. However, the present invention is not limited to any of the above embodiments. Explain first.

As shown in Fig. 1, when the user puts on the shoes, the carrying mat 1 is used to carry the sole of the user. Further, the carrier pad 1 has a soft material layer 11 and a hard material layer 12. The soft material layer 11 has a first side 11a and a second side 11b. The first side 11a is for carrying the sole of the user, and the hard material layer 12 is disposed at the second of the soft material layer 11. Side 11b. The replication element 2 is directed to the hard material layer 12, as described above, when the user puts on the shoe, the first side 11a of the soft material layer 11 carries the user's foot and receives the force applied by the user to one of its feet ( Not shown), the soft material layer 11 transfers the above force to the hard material layer 12 to squeeze the hard material layer 12 The element 2 is pressed and written, and at least one image corresponding to the above force is printed on the copy element 2 (refer to FIGS. 4 to 6).

In the preferred embodiment shown in FIG. 1, the soft material layer 11 may be a soft PU material or a silicone soft material, and the hard material layer 12 may be a polyurethane material or an unsaturated polyester resin material. Further, the soft material layer 11 has a certain degree of stretching when the user applies the force thereon, and the soft material layer 12 stretches to drive the hard material layer 12 to be displaced, thereby causing the hard material layer 12 to be in the replication element 2 Traces (ie, the aforementioned image) are left on. That is to say, in addition to measuring the pressure of the sole of the foot, the present invention can also measure the change of the lateral displacement of the shear force, so as to effectively observe the displacement trace caused by the shear force. The hardness of the soft material layer 11 measured by the Shore A hardness is preferably between 20 and 40 degrees. The hard material layer 12 must be a hard material that can create an indentation on the replication element 2 (preferably a carbonless copy paper), that is, if the hard material layer 12 is too soft, it will not be apparent on the replication element 2. The trace, therefore, the hardness of the hard material layer 12 as measured by Shore D hardness is preferably between 70 and 90 degrees.

Referring to FIG. 1 again, the hard material layer 12 includes a plurality of cones 12a each connected to the second side 11b of the soft material layer 11 with its bottom surface, and the vertices of the plurality of cones are directly opposite to each other. Element 2. In a preferred embodiment, the cones 12a can be conical and arranged at a distance from each other on the second side 11b of the layer of soft material 11. In one embodiment, the cones 12a are disposed on the second side 11b of the soft material layer 11 at a pitch of 4 centimeters (mm), and the tapers 12a have a taper of 120 degrees. However, it must be stated However, although the above numerical values are preferably set, the present invention is not intended to be limited thereto, that is, the funnel 12a may also have a shape such as a quadrangular pyramid or a hexagonal pyramid, which will be described first.

Please refer to FIG. 2 at the same time. FIG. 2 is a cross-sectional view showing a replica element of a preferred embodiment of the present invention. In the preferred embodiment, the replication element 2 is a carbonless copy paper. Basically, the copying element 2 (i.e., the carbonless copy paper) contains at least one of the first paper 21 and the second paper 22 stacked. The first paper 21 is provided with a developer 211, and the second paper 22 faces the plurality of cones 12a of the hard material layer 12 and is provided with a plurality of capsules 221 coated with pigment.

The method for measuring the strength of the plantar shear according to the present invention can be further explained in accordance with Fig. 2, which comprises at least the following steps: First, the layer of soft material 11 receives the force applied to the sole of the user by the user. Then, the soft material layer 11 transfers the above force to the hard material layer 12, that is, when the soft material layer 11 can be pressed to further press the hard material layer 12, the soft material layer 11 is also driven by the force stretching. The hard material layer 12 is displaced. At this time, the hard material layer 12 receives the above force (ie, arrow F) and presses the second paper 22 of the replication element 2, causing the plurality of capsules 221 on the second paper 22 to be broken, and the plurality of pigments are self-ruptured. The capsule 221 overflows and reacts with the developer 211 on the first sheet 21 of the copying element 2 to print an image P.

The detailed structure of the plantar pressure-shearing force measuring device 100 provided by the present invention has been described above. The foot-spinning force measuring device 100 will be used to measure the motion of the plantar foot of the user. The three kinds of exercise behaviors of walking, running and side running respectively indicate that the measurement results are as follows.

First, please refer to FIG. 3, and FIG. 3 is a preferred embodiment of the present invention. In the example, the foot pressure and force measuring device is used to measure the user's foot pressure and shear force distribution during walking. As shown in Figure 4, in addition to the clear foot shape (the foot shape depicted by the solid line and the dotted line represents the measurement results of the user at different positions), the force behavior can also be clearly display. In terms of stress behavior, the foot and the heel of the two feet received greater pressure, followed by the thumb and the arch part. In terms of shear behavior, each point on the replication element is the pressure point. Since the hard material layer used in the present invention is a cone, the pressure point subjected to the positive force and without any shear force is circular, and there is a side. The pressure point to the shear force is elliptical or strip-shaped (the ellipse or strip depends on the lateral shear force). As can be seen from Fig. 3, the left foot has obvious traces on the forefoot and is directional. The left side of the forefoot shows that the shear direction is distributed to the lower right (as indicated by arrow A), while the right pattern is The direction of the shear force is displayed to the lower left (as indicated by arrow B). On the contrary, the subject has no shearing behavior on the left foot test piece, and the pressure point is presented in a small dot manner.

Next, referring to FIG. 4, FIG. 4 is a diagram showing the distribution of the plantar pressure and shear force of the user during running by using the plantar pressure-shearing force measuring device in a preferred embodiment of the present invention. It can be seen from Fig. 4 that the pressure on the rewriting element during running is significantly larger than that of normal walking, and there is a slight twist in the selection of the right thumb circle. Moreover, the pressure between the two feet and the direction of the shear force are not much different, and the front and rear directions are mainly (as indicated by the arrow C). However, the right heel can be found to have some shearing force to the right rear (as indicated by arrow D).

Finally, please refer to FIG. 5. FIG. 5 is a diagram showing the distribution of the plantar pressure and the shear force of the user in the side running by using the plantar pressure-shearing force measuring device according to a preferred embodiment of the present invention. The so-called side run is the way the user moves back and forth in a lateral movement, in order to observe the fixed point back and forth. Pressure and lateral shear distribution during side running. As shown in Fig. 5, it can be clearly seen that the compressive shear force on the rewriting element when the fixed point is running back and forth is very different from that of normal walking and running. In terms of stress behavior, the pressure of the heel is very small compared to other blocks. The pressure is mostly concentrated in the medial part of the forefoot and the inside of the thumb. From the observation of the shearing behavior, it can be found that the shearing force of the two feet presents a rather symmetrical pattern, the shearing force of the thumb is directed to the outer side (as indicated by the arrow E), and the shearing direction of the forefoot is also outwardly turned out (such as the arrow). F shows). The preliminary analysis should be for the left and right sideways. When the sole reaches the fixed point, it is mainly supported and held by the thumb and the medial forefoot. At this time, the foot supports the whole body weight and supports the inertia after the body movement, so the sole A considerable lateral force is applied, which in turn produces a shear peak at the two blocks on the replication element.

The invention can be regarded as forming a plurality of tiny protruding hard cones on an elastic soft thin plate, each cone acting as a pen, and each pen can be applied under the force of the sole pressure Traces are left on the copy element (carbonless copy paper). Since each cone is fixed on the soft thin plate, it can move freely independently, which is equivalent to the measuring tool with multiple independent shear force recorders at the same time. And because the protruding cone will sink deeper under the greater force, the trace will be coarser, so the pressure can be judged according to the size of the trace.

Because in the gait behavior, in addition to the downward force exerting the foot pressure behavior, the human foot also has a lateral slip action and produces a shearing behavior. The example of lateral shearing shear behavior with the right foot to the right will cause the cone to move to the right when the right foot is stepped down, so the trace caused by each cone will be a horizontal line to the right. The moment the horizontal line is down is a small point. While moving to the right, the power is gradually increased, and the end point of the traverse is the maximum point. Therefore, the shear behavior of the traverse amount can be judged according to the length of the trace.

From each embossed mark, the pressure of the sole to the ground and the direction of the shearing force of the force can be known, and the full foot print behavior can be used to analyze and explain the urging behavior during the gait.

In summary, the present invention is a measuring device for inventing a micro-structured foot pressure and shear force in a shoe. After walking a few steps, the hard material layer in the bearing pad will be on the replication element. Leaving the traces of pressure and shear, and using the life close to the user, the practicality and convenience of the measuring device are greatly improved.

In addition, according to the actual measurement results, the foot press shear strength measuring device of the present invention has a relatively high shear force measuring capability, and the current resolution is one square centimeter 6 senser and 25 senser, respectively, compared with the current electrical power on the market. The pressure-shearing force measuring device, the invention effectively improves the resolution, and can observe the pressure and shear data of the complete foot. Therefore, the materials used in the present invention are more effective in reducing the overall cost than the modern electrical or optical measuring devices of the prior art.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the following. Within the scope of the patent application.

100‧‧‧Foot shear strength measuring device

1‧‧‧ carrying mat

11‧‧‧Soft material layer

11a‧‧‧First side of the soft material layer

11b‧‧‧Second side of the soft material layer

12‧‧‧hard material layer

12a‧‧‧ cone

2‧‧‧Rewriting components

21‧‧‧First paper

211‧‧‧developer

22‧‧‧ second paper

221‧‧‧ capsules

P‧‧‧ image

A~F, G‧‧‧ direction of force

Figure 1 shows a foot press shear force measurement according to a preferred embodiment of the present invention. FIG. 2 is a cross-sectional view showing a copying element according to a preferred embodiment of the present invention; and FIG. 3 is a view showing a plantar pressure measured by a plantar press force measuring device according to a preferred embodiment of the present invention. And a shear force profile; FIG. 4 is a view showing another foot pressure and shear force distribution measured by a plantar pressure-shearing force measuring device in a preferred embodiment of the present invention; and FIG. 5 shows a preferred embodiment of the present invention. In the embodiment, the pressure of the rest of the foot and the shear force distribution measured by the plantar pressure-shearing force measuring device are shown.

100‧‧‧Foot shear strength measuring device

1‧‧‧ carrying mat

11‧‧‧Soft material layer

11a‧‧‧First side of the soft material layer

11b‧‧‧Second side of the soft material layer

12‧‧‧hard material layer

12a‧‧‧ cone

2‧‧‧Rewriting components

Claims (10)

A foot press force measuring device that can be placed in a shoe for being placed in a shoe for measuring pressure and shear force, the device comprising at least: a carrier pad for carrying a user's sole The carrier pad comprises: a layer of soft material having a first side opposite to a second side, the first side carrying the sole of the user; a layer of hard material disposed on the layer of soft material a second side; and a replication element facing the layer of hard material; wherein the soft material layer receives a force applied by the user to the foot when the user wears the shoe, the soft material layer Power is transmitted to the layer of hard material such that the layer of hard material presses the replication element and at least one image corresponding to the force is printed on the replication element. The plantar shear strength measuring device according to claim 1, wherein the soft material layer is selected from the group consisting of a PU material and a silicone soft material. The plantar press shear strength measuring device according to claim 2, wherein the hardness of the soft material layer measured by Shore A hardness is between 20 and 40 degrees. The plantar shear strength measuring device according to claim 1, wherein the hard material layer comprises a hard material capable of generating an indentation on the writing element, and the hard material layer is measured by Shore D hardness. The resulting hardness is between 70 and 90 degrees. The foot press shear strength measuring device according to claim 1 of the patent application, The hard material layer comprises a plurality of cones, the plurality of cones being joined to the second side of the layer of soft material by a bottom surface thereof, and the vertices of the plurality of cones are facing the element. The plantar shear strength measuring device according to claim 5, wherein the cones are conical and arranged at a distance from the second side of the soft material layer. The plantar shear strength measuring device according to claim 1, wherein the force comprises a sole pressure and a shear force. The plantar shear strength measuring device according to claim 1, wherein the copying component is a carbonless copying paper. The plantar shear strength measuring device according to claim 8, wherein the carbonless copy paper comprises at least a first paper and a second paper, the first paper is provided with a color developer, and the second paper The hard material layer is provided with a plurality of capsules coated with pigment. The method for measuring a foot pressure of a foot of a foot-scissing force measuring device according to claim 9, wherein the method for measuring the amount of the foot pressure comprises at least the following steps: the soft material layer receives the user-administered The force of the sole; the layer of soft material transfers the force to the layer of hard material; the layer of hard material receives the force to squeeze the second sheet of the replication element to rupture the capsules on the second sheet of paper And the capsule overflows from the ruptured capsule and reacts with the developer on the first sheet of the replication element to print the image.