TWI616189B - Wearable device for measuring foot shape and thenar pressure - Google Patents

Abstract

The invention discloses a wearable foot type foot pressure measuring device for measuring a foot shape and a foot pressure of a user, which comprises an elastic wearing article, a lateral supporting member, a longitudinal supporting member, a lateral measuring member and a longitudinal measuring member. Among them, the elastic wearing article can be worn by the user on the foot. The lateral support members are fixed to both sides of the palm portion and include a lateral connecting unit that telescopically connects the two sides of the foot portion, and the lateral measuring member also disposed on the elastic wearing member can measure the current length of the lateral connecting unit. Get the user's foot width. The longitudinal support member is fixed to the front end and the rear end of the elastic wearing article, and comprises a longitudinal connecting unit that telescopically connects the front end and the rear end of the elastic wearing object, and the longitudinal measuring member can measure the current length of the longitudinal connecting unit to obtain the user. The length of the foot.

Description

Wearable foot type foot pressure measuring device

The present invention relates to a wearable foot type foot pressure measuring device, and more particularly to a wearable foot type foot pressure measuring device capable of simultaneously measuring foot type and foot pressure.

Shoes are one of the indispensable daily necessities of modern people. They protect the wearer from running on the ground or walking without hurting the soles of the feet, and provide appropriate friction to make the wearer move more easily. The appearance of the shoes is also decorated. A ring. In addition to external protection or decoration, whether the shoes are worn comfortably is also an important consideration for the wearer or consumer when purchasing shoes. By adjusting the size of the shoe, the shape of the insole, and the degree of breathability, the wearer can more comfortable walking or running. If you wear unsuitable shoes for a long time, in addition to the pain and deformation of the foot, it may affect the standing position and even the scoliosis and cause the lesion. Therefore, in addition to the introduction of shoes or insoles of various sizes and shapes for consumers to choose the shoes suitable for their feet, there are also services for providing customized shoes and insoles on the market.

To introduce customized shoes and insoles, the consumer's foot and foot pressure must first be accurately measured. Usually the measurement of foot and foot pressure is carried out separately, and the separate measurement requires the use of two instruments, which are subject to two measurement procedures, which is inconvenient. Current city There are already instruments that can measure foot and foot pressure at the same time. However, such instruments are usually non-wearable. Consumers must put their feet in a measuring instrument and step on the bottom of the instrument through the optical scanning inside the instrument. The foot shape is measured and the pressure distribution is sensed by a pressure sensor at the bottom of the instrument. Such an instrument capable of simultaneously measuring foot and foot pressure only measures the distribution of foot pressure when the consumer is standing still, and cannot measure the distribution of foot pressure during exercise, so it cannot be customized for the state of motion of the consumer. On the other hand, the cost of manufacturing such instruments that measure both foot and foot pressure is also quite expensive.

Therefore, it is necessary to design a foot-foot pressure measuring device capable of simultaneously measuring the foot shape of the consumer and the distribution of the foot pressure during exercise, and having a low cost.

One aspect of the present invention is to provide a wearable foot-type foot pressure measuring device that can be worn on a user's foot while simultaneously measuring the foot shape of the consumer and the distribution of foot pressure during rest or movement.

According to a specific embodiment, the wearable foot-type foot pressure measuring device of the present invention can be used to measure a user's foot shape and foot pressure, and includes an elastic wearing article, a lateral supporting member, a longitudinal supporting member, a lateral measuring member, The longitudinal measuring member and the at least one foot measuring member, wherein the lateral supporting member, the longitudinal supporting member, the lateral measuring member, the longitudinal measuring member and the foot measuring member are respectively disposed on the elastic wearing article. The user can wear the elastic wearing article to the foot thereof, and the elastic wearing member elastically conforms to the user's foot.

In this embodiment, the elastic wearing article comprises a sole portion, a heel portion corresponding to the sole portion of the foot, and an ankle-fixing portion between the palm portion and the heel portion, and the user can wear the elastic foot-worn article when the user wears the foot. The parts are placed in the corresponding positions, and the parts are moved by the fixed part. The sexually wearable article is fixed to the foot so that it does not fall off. The lateral support member has two lateral fixing units and lateral connecting units, the lateral fixing units are respectively disposed on both sides of the sole portion, and the lateral connecting unit is retractably connected to the two lateral fixing units. The lateral measuring member can be coupled to the lateral support member and can measure the current length of the lateral connecting unit to obtain the user's foot width. The longitudinal support member has two longitudinal fixing units and a longitudinal connecting unit. The two longitudinal fixing units are respectively disposed at the front end of the sole portion and the rear end of the heel portion, and the longitudinal connecting unit telescopically connects the two longitudinal fixing units. The longitudinal gauge can be coupled to the lateral support and can measure the current length of the longitudinal attachment unit to obtain the length of the user's foot. At least one foot measuring member may be respectively disposed in at least one of the sole portion, the ankle fixed portion and the heel portion, which may respectively comprise an annular connecting unit, and the foot measuring device can measure the annular connection The current length of the unit is the length of the user's foot.

In addition, in this embodiment, the elastic wearing article has a sole that can be contacted to the sole of the user when the user wears the elastic wearing article. The wearable foot-type foot pressure measuring device may further comprise a plurality of pressure sensors disposed and distributed at the bottom of the foot to measure the user's foot pressure distribution.

Thereby, the user can wear the wearable foot type foot pressure measuring device of the present invention to perform movement, and simultaneously measure the foot portion through the size measuring member and the pressure measuring member of the wearable foot type foot pressure measuring device. Size, shape and plantar pressure distribution.

1, 2, 3 ‧ ‧ wearable foot type foot pressure measuring device

10, 20, 30‧‧‧Elastic wearable objects

11‧‧‧Horizontal support

12‧‧‧Vertical support

13‧‧‧ lateral measuring parts

14‧‧‧ longitudinal measuring parts

15, 25‧‧‧ Pressure Sensor

100, 300‧‧‧foot

102, 302‧‧‧ heel

104, 304‧‧‧foot fixation department

106‧‧‧foot bottom

110‧‧‧Horizontal fixed unit

112‧‧‧Horizontal connection unit

120‧‧‧Longitudinal fixed unit

122‧‧‧Longitudinal connection unit

160‧‧‧ Third rotating storage mechanism

162‧‧‧ third ruler

1120‧‧‧ first ruler

1122‧‧‧First rotating storage mechanism

1220‧‧‧second ruler

1222‧‧‧Second rotating storage mechanism

380, 382‧‧‧ foot measuring parts

384‧‧‧foot back measuring piece

1 is a schematic view of a wearable foot-type foot pressure measuring device according to an embodiment of the present invention.

Figure 2 is a view showing the wearable foot pressure measuring device of Figure 1 in another view Schematic diagram of the corner.

Figure 3 is a partial schematic view showing the wearable foot pressure measuring device of Figure 1.

4 is a schematic view showing a foot-type foot pressure measuring device according to another embodiment of the present invention.

5 and 6 are schematic views showing a wearable foot pressure measuring device according to another embodiment of the present invention.

Referring to FIG. 1 to FIG. 3 together, FIG. 1 is a schematic diagram showing a wearable foot pressure measuring device 1 according to an embodiment of the present invention, and FIG. 2 is a wearable foot pressure device of FIG. FIG. 3 is a schematic diagram showing a part of the wearable foot pressure measuring device 1 of FIG. 1 . As shown in FIG. 1 to FIG. 3, the wearable foot type foot pressure measuring device 1 comprises an elastic wearing article 10, a lateral supporting member 11, a longitudinal supporting member 12, a lateral measuring member 13 and a longitudinal measuring member 14, wherein the elastic wearing device The article 10 has a sole 100, a heel portion 102, an ankle fixation portion 104 therebetween, and a sole 106 that is worn by a user, and the foot bottom 106 contacts the user's foot when worn. The palm portion 100 can cover the forefoot of the user, the heel portion 102 covers the heel of the user, and the elastic wear article 10 can be secured to the user's foot by the ankle strap portion 104. In this particular embodiment, the elastic wear article 10 can be formed from a variety of resilient materials, such as an elastic material, and thus telescopic to conform to the user's foot. Please note that FIG. 3 is a schematic view showing the inside of the palm portion 100, the heel portion 102, and the ankle-fixing portion 104 of the foot-type foot pressure measuring device 1 of FIG. 1 , only the illustration of the specific portion is omitted, and Figure 1 foot type pressure measurement Setting 1 is no different.

The lateral support member 11 further includes two lateral fixing units 110 respectively disposed on both sides of the sole 100 of the elastic wearing article 10, and the lateral supporting member 11 further includes a lateral connecting unit 112 connecting the two lateral fixing units 110, wherein The lateral connection unit 112 may include a first ruler 1120 that is not elastic and a first rotation accommodation mechanism 1122, as shown in FIGS. 2 and 3. In the present embodiment, the first rotating storage mechanism 1122 is located inside the palm portion 100 and corresponds to the back of the user, so that the user does not step on the first rotating storage mechanism 1122 when the user moves to cause damage. When the palm portion 100 is opened by the user's foot, the first ruler 1120 is pulled out of the first rotation accommodation mechanism 1122 by the two lateral fixing units 110, so that the first ruler 1120 protrudes from the first rotation accommodation mechanism 1122. The length generally corresponds to the width of the foot portion 100, in other words, substantially conforms to the width of the user's foot.

The lateral measuring member 13 can be coupled to the lateral support member 11 and, further, can be coupled to the first rotational accommodation mechanism 1122 of the lateral connection unit 112, thereby obtaining the first ruler 1120 extending from the first rotational accommodation mechanism 1122. length. For example, the lateral measuring member 13 can be one of a rotary encoder or a potentiometer, and the first rotating storage mechanism 1122 can rotate the first ruler 1120, so that it can be distinguished by a rotary encoder or a potentiometer. The current rotation length of the rotating structure of the first rotating storage mechanism 1122 and the diameter of the rotating structure can be used to calculate the current length of the first ruler 1120 that is released. Alternatively, the first ruler 1120 can be provided with a scale code, whereby the lateral measure 13 can measure the number of scales of the first ruler 1120 released or extended by the first rotary storage mechanism 1122, and according to the number of scales. The current length of the first ruler 1120 is calculated to obtain the user's foot width.

Please note that in the embodiment, the lateral measuring member 13 and the first rotating storage mechanism 1122 are two units connected to each other and are also disposed inside the sole 100, as shown in FIG. 3, but in practice, the horizontal direction The measuring member 13 can be directly established in the housing of the first rotating storage mechanism 1122 to directly measure the current length of the first ruler 1120 released or extended by the first rotating storage mechanism 1122.

Similarly, the longitudinal support member 12 further includes two longitudinal fixing units 120 respectively disposed at the front end of the sole portion 100 and the rear end of the heel portion 102. Further, the longitudinal support member 12 further includes a longitudinal connection connecting the two longitudinal fixing units 120. Unit 122. Likewise, the longitudinal connection unit 122 may include a second ruler 1220 that is not resilient and a second rotation accommodation mechanism 1222. When the user wears the elastic wearing article, the second ruler 1220 is pulled out of the second rotating storage mechanism 1222 by the two longitudinal fixing units 120, so that the length of the second ruler 1220 protruding from the second rotating receiving mechanism 1222 is substantially elastic. The length of the article of wear 10, in other words, substantially conforms to the length of the user's foot.

Similarly, the lateral measuring member 14 can be coupled to the longitudinal support member 12, and further, can be coupled to the second rotary housing mechanism 1222 of the longitudinally coupled unit, thereby obtaining a second ruler extending from the second rotational accommodation mechanism 1222. The length of 1220. In practice, the longitudinal measuring member 14 can be one of a rotary encoder or a potentiometer, and the second ruler 1220 is provided with a scale code, whereby the longitudinal measuring member 14 can measure the second rotating storage. The number of scales of the second ruler 1220 released or extended by the mechanism 1222 is calculated based on the number of scales to obtain the current length of the second ruler 1220 to obtain the length of the user's foot.

In the above specific embodiment, the lateral connecting unit 112 and the longitudinal connecting unit 122 measure the alignment of the user's foot with the rotating storage mechanism and the inelastic ruler. The length is obtained. However, in practice, the lateral connecting unit and the longitudinal connecting unit may also be in the form of elastic strips, which are directly sewn to the elastic wearing article, so that the horizontal connecting unit and the longitudinal connecting unit can be used for telescopic fitting with the elastic wearing articles. The foot is then the foot size.

Moreover, in the present embodiment, the foot bottom 106 of the elastic wearing article 10 also has a plurality of pressure sensors 15. When the user wears the elastic wearing article 10, the sole 106 is in close contact with the sole of the user due to the elasticity, and the pressure sensor 15 is also in contact with the sole of the user at the same time. When the user wears the elastic wearing article 10 for exercise, each pressure sensor 15 can respectively sense the pressure of the corresponding position of the user's foot, that is, the foot pressure.

In FIG. 1 , the number of the pressure sensors 15 is three, which are respectively disposed on the front side, the middle side and the rear side of the foot bottom 106 of the elastic wearing component 10 , so that the forefoot of the user during exercise can be simultaneously measured. The pressure of the center of the foot or the arch of the foot, as well as the heel. Although the number of the pressure sensors 15 of the specific embodiment is three, in practice, more pressure sensors can be disposed on the bottom of the foot to more accurately obtain the sole of the user when performing various exercises. The pressure distribution is used for subsequent applications, for example, to determine whether the user is not in a posture when the user is stationary or during exercise, or to control the various devices using the measured pressure. The pressure data sensed by the pressure sensor can be collected by an electronic device or processor disposed on the wearable foot pressure measuring device 1 and transmitted to an external processing device by wire or wireless transmission. For example, a mobile phone or a tablet computer can be used to analyze the pressure of the user's foot; or the pressure sensor itself can directly transmit the measured pressure data to an external electronic processing device for calculation and analysis.

Although the pressure sensor 15 of the specific embodiment is disposed on the elastic wearer The foot 10 of the foot 10 of the member 10 can be disposed at other positions of the elastic wearing member 10 in practice, and the present invention is not limited thereto. Referring to FIG. 4, FIG. 4 is a schematic diagram showing a foot-type foot pressure measuring device 2 according to another embodiment of the present invention. As shown in FIG. 4, the difference between the specific embodiment and the previous embodiment is that the pressure sensor 25 of the specific embodiment is disposed at the bottom of the elastic wearing component 20, and in addition, the number of the pressure sensors 25 is also More than the number of pressure sensors of the previous embodiment.

Please refer to Figure 1 to Figure 3. In the present embodiment, the elastic wear article 10 of the wearable foot type foot pressure measuring device 1 further includes an ankle fixation portion 104 between the paw portion 100 and the heel portion 102. When the user wears the elastic wearing article 10, the ankle securing portion 104 can bypass the back of the user, thereby securing the elastic wearing article 10 to the palm of the user's foot. The ankle fixation portion 104 of FIG. 1 to FIG. 3 is fixed integrally with the sole 106. The user can directly penetrate the through hole of the ankle fixation portion 104 to penetrate the palm of the foot into the palm portion 100. However, the practice is not limited thereto. For example, the ankle fixation portion may also be at least one connecting belt connected to the elastic wearing object at one end, and the other end is a connecting member, and the connecting belt is provided when the user's foot is placed in the elastic wearing object. The elastically wearable article is attached to the user's foot by bypassing the instep and connecting to each other through a connector, or by routing a single strap around the instep and attaching the connector to the elastic article 10.

In the specific embodiment, the ankle-fixing portion 104 may have a third rotation storage mechanism 160 and a third ruler 162 connectable and received in the third rotation storage mechanism 160 to measure the height of the user's arch. . As shown in FIG. 3, the third rotary storage mechanism 160 and the third ruler 162 may be disposed in the ankle-fixing portion 104. The third rotating storage mechanism 160 is disposed at a higher fixed height than the bottom of the foot, for example, the bottom of the foot is away from the elastic wearing article 10 If the bottom portion is 3 cm, the third rotary storage mechanism 160 can be disposed at a height of 5 cm from the bottom of the elastic wearing article 10, and the third ruler 162 is extended from the third rotary storage mechanism 160 to the bottom of the foot. That is, the extended third ruler 162 has a length of 2 cm. When the user wears the elastic wearing article 10 of the present embodiment, the bottom of the foot is compressed by the user to step on, and the third ruler 162 is relatively driven to protrude from the third rotating storage mechanism 160. Through the height measuring member, the additional length of the third ruler 162 can be measured, or the current length of the third ruler 162 can be directly measured, and the fixed height is measured by subtracting the height measuring piece. The current length of the third ruler 162 is the height of the user's arch. It should be noted that the height measuring component can have the same type or the same function as the foregoing lateral measuring component 13 and the longitudinal measuring component 14, and therefore will not be described herein. In addition, the same third rotating storage mechanism, the third ruler and the height measuring member may be disposed on the other side of the arch to measure the height of the outer side of the user's arch, thereby obtaining more accurate The shape of the sole of the user. .

In addition to the width of the foot, the length of the foot, the height of the foot, and the height of the arch in the foregoing embodiments, the user's foot can be more accurately measured through other measuring members disposed on the elastic wearing article. Shape and size. Referring to FIG. 5 and FIG. 6 together, FIG. 5 and FIG. 6 are schematic diagrams showing a wearable foot-type foot pressure measuring device 3 according to another embodiment of the present invention. As shown in FIG. 5 and FIG. 6, the wearable foot pressure measuring device 3 of the present embodiment also has an elastic wearing article 30, and the elastic wearing article 30 has a sole portion 300, a heel portion 302, and both An ankle fixation portion 304.

As shown in FIG. 5, in the specific embodiment, the wearable foot pressure measuring device 3 further includes a foot measuring members 380, 382 disposed in the palm portion 300 and the ankle fixing portion 304, respectively. And having an annular connecting unit around the foot 300 or the ankle Part 304. When the user wears the elastic wearing article 30, the elastic wearing article 30 fits the user's foot, so that the annular connecting unit of the foot measuring members 380, 382 surrounds and fits the user's foot, and the ring shape The current length of the connecting unit is the length of the user's foot circumference, so measuring the current length of the annular connecting unit can obtain the length of the user's foot. In the present embodiment, the foot-foot pressure measuring device 3 includes two foot measuring members 380, 382 to obtain a foot circumference of the user's foot and ankle portion. However, in practice, the foot measuring device The number and the position of the setting are not limited thereto. For example, a plurality of foot measuring members may be disposed at the front end of the sole of the elastic wearing article to measure the circumference of the user's toe, the circumference of the hoe, or the circumference of the instep. It is also possible to provide a foot measuring piece at the heel portion to measure the user's ankle diameter and the like.

In addition, as shown in FIG. 6, the wearable foot pressure measuring device 3 of the specific embodiment further includes a plurality of instep measuring members 384 disposed in the sole portion 300 and the ankle-fixing portion 304, respectively. And corresponding to the user's foot. Each of the instep measuring members 384 includes a foot-back connecting unit that is longitudinally disposed in the sole portion 300 and the ankle-fixing portion 304. When the user wears the elastic wearing member 30, the elastic wearing member 30 is in accordance with the user. The foot is telescopic, so that the instep connection unit is also telescoped to the current length, so measuring the current length of the instep connection unit can obtain the longitudinal length of the user's instep.

The above-mentioned foot circumference measuring members 380, 382 and the back connecting member of the foot back measuring member 384 and the foot back connecting member may adopt a non-elastic ruler to cooperate with a rotating storage mechanism or an elastic ruler. It depends on the needs of the user or the designer.

In summary, the body of the wearable foot-type foot pressure measuring device of the present invention is an elastic wearing object, and the elastic wearing article can be closely attached to the foot after the user wears the foot, so the foot-foot pressure measurement The device can measure the user's foot width, foot length and height. At the same time, since the elastic wearing object closely fits the user's foot, the user can move more easily under the condition of wearing the elastic wearing object, and the pressure sensor located at the bottom of the elastic wearing object can sense the user's motion. The pressure of the foot. In other words, the wearable foot-type foot pressure measuring device of the present invention can simultaneously realize the function of measuring the foot shape and the foot pressure distribution during exercise, and since each unit of the wearable foot-type foot pressure measuring device is made of elastic material, The wearable foot-type foot pressure measuring device of the present invention also has the advantage of low cost, such as a ruler, a rotating storage mechanism, a pressure sensor, and the like.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed. Therefore, the scope of the patented scope of the invention should be construed in the broadest

Claims (8)

A wearable foot type foot pressure measuring device for measuring a foot shape and a foot pressure of a user, the wearable foot type foot pressure measuring device comprising: an elastic wearing article for the user to wear on the foot Optionally, the elastic wearing article further comprises a sole portion, a heel portion relative to the sole portion of the foot portion, and an ankle fixation portion between the sole portion and the heel portion; a lateral support member including two lateral fixation portions a unit and a lateral connecting unit, the two lateral fixing units are respectively disposed at two sides of the foot portion, the horizontal connecting unit telescopically connects the two lateral fixing units; a longitudinal supporting member comprising two longitudinal fixing units and a longitudinal connection a unit, the two longitudinal fixing units are respectively disposed at a front end of the sole portion and a rear end of the heel portion, the longitudinal connecting unit telescopically connecting the two longitudinal fixing units; a lateral measuring member connecting the lateral support a piece to obtain a first current length of one of the transverse connecting units; a longitudinal measuring member connecting the longitudinal supporting member to obtain a second current length of the one of the longitudinal connecting units And at least one foot measuring component disposed in at least one of the sole portion, the ankle fixation portion and the heel portion, the at least one foot circumference measuring member respectively comprising an annular connecting unit, the at least one foot circumference Measuring, by the measuring piece, a third current length of the annular connecting unit; wherein at least one of the horizontal connecting unit and the longitudinal connecting unit comprises a ruler and a rotating storage mechanism connecting the ruler, the ruler Retracting function is achieved by the receiving mechanism; wherein when the user wears the elastic wearing article, the elastic wearing article is telescoped to fit the foot of the user, so that the first current length of the lateral connecting unit is expanded to The width of the user's foot, the second current length of the longitudinal connecting unit is stretched to the length of the user's foot, and the annular connecting unit surrounds and fits the user's foot to expand and contract to the user The length of the foot. The wearable foot-type foot pressure measuring device according to claim 1, wherein the horizontal The connecting unit includes a first ruler and a first rotating storage mechanism connecting the first ruler, the lateral measuring component is one of a rotary encoder and a potentiometer, and the lateral measuring component is connected to the first Rotating the storage mechanism to measure the first current length of the first ruler, the longitudinal connection unit comprising a second ruler and a second rotary storage mechanism connecting the second ruler, the longitudinal measurement The workpiece is one of a rotary encoder and a potentiometer, the longitudinal measuring member being coupled to the second rotary housing mechanism for measuring the second current length of the second ruler released. The wearable foot-type foot pressure measuring device according to claim 1, wherein the lateral connecting unit is a first elastic ruler, is stitched to the sole portion, and the longitudinal connecting unit is a second The elastic strip is sewn to the elastic wearing article, and when the user wears the elastic wearing article, the elastic wearing article and the elastic strip extend and contract to fit the foot of the user, so that the first elastic strip The first current length is stretched to the width of the user's foot, and the second current length of the second elastic strip is stretched to the length of the user's foot. The wearable foot-type foot pressure measuring device of claim 1, wherein the elastic wearing article comprises a foot bottom, and when the user wears the elastic wearing object, the foot bottom contacts the user's sole. The wearable foot pressure measuring device further includes a plurality of pressure sensors disposed in the sole of the foot to measure the user's foot pressure. The wearable foot-type foot pressure measuring device according to claim 4, wherein the number of the pressure sensors is at least three, which are respectively disposed on a front side, a middle side and a rear side of the sole of the foot. side. The wearable foot-foot pressure measuring device of claim 1, wherein the ankle-fixing portion comprises at least one connecting strap and a connecting member disposed on the at least one connecting strap, when the user wears When the article is elastically worn, the at least one connecting strap bypasses the back of the user, and the elastic wearing article is fixed to the user's foot by the connecting member. For example, the wearable foot type foot pressure measuring device described in claim 1 of the patent application further includes a third rotating storage mechanism including a third ruler connected to the third ruler and a height measuring member respectively disposed in the footrest fixing portion, wherein the elastic wearing article comprises a foot bottom, the third rotation The receiving mechanism is disposed at a fixed height higher than the bottom of the foot, the third ruler extends from the third rotating storage mechanism and one end is connected to the bottom of the foot, and the height measuring component is connected to the third rotating storage mechanism. When the user wears the elastic wearing article, the bottom of the user steps on the bottom of the foot to drive the third ruler to further extend to a fourth current length, and the height measuring component measures the third ruler The fourth current length. The wearable foot pressure measuring device according to claim 1, further comprising at least one foot measuring component disposed in at least one of the sole portion and the ankle fixed portion and corresponding to The at least one foot back measuring unit respectively includes a foot back connecting unit, and when the user wears the elastic wearing object, the foot connecting unit fits the user's foot, and the at least one foot circumference measurement The piece measures a fifth current length of the instep connection unit to obtain the foot length of the user.