TWI629946B - Air cushioned shoe device - Google Patents

Abstract

The utility model relates to a shoe device with air cushion, which has a shoe body; an air cushion body, which comprises a front pad, a compression cylinder pad and a pressure regulating valve, the front pad has a duct portion and an air bag portion, and the duct portion is provided with a plurality of imports. In addition, a first air pipe connecting conduit portion and a compression cylinder pad and a second air pipe are connected to compress the cylinder head gasket and the air bag portion, and the pressure regulating valve is installed on the shoe body and adjusts the internal pressure, and the pressure regulating valve protrudes at one end of the shoe body. The entrance and the unloading road, wherein the inlet duct is connected with a third air pipe to connect the second air pipe, and the unloading port is connected to one end of the fourth air pipe, and the other end is exposed by the side of the shoe body; the insole is installed in the shoe body and The air cushion body is covered; wherein, the foot is stepped on the front and back of the air cushion body, so that each inlet sucks the fluid generated in the shoe body and is discharged through the fourth air pipe.

Description

Air cushioned shoe device

The invention relates to a shoe device with air cushion, in particular to a shoe device capable of reducing the impact force of a foot of a wearer on walking, running and the like, thereby protecting the safety of the foot, which is a practicality. Excellent invention.

Shoes are a kind of accessories that can protect the safety of human feet. With the evolution of the times, the evolution of shoes has also provided the comfort of wearing shoes from the early grass shoes and rafts to today's silicone shoes and air cushion shoes, especially The most popular air-cushion shoes on the market are worn by most people. Air-cushion shoes can mainly protect the wearer's foot from the impact force and pressure on running, jumping and walking. Generally, the shoes without air cushion are long in the shoes. Time to walk, run and jump, the foot will bear a great impulse, resulting in inflammation of the foot's warp membrane, fracture, etc., and even affect the development of the bones of the foot, so today's shoe industry is thinking of shoes with air cushion function roll out.

There are many types of air-cushion shoes in the market, each of which is different in cushioning. Some shoes are made of PU material on the inner side of the sole of the shoe, or equipped with a spring. The buffering effect is achieved, but the PU material and the spring effect cannot achieve the effect like an air cushioned shoe. It is often necessary to match the insole installed in the shoe to achieve proper cushioning effect, but the buffering of this method only Accelerating the damage of the insole and the PU material, or accelerating the elastic fatigue of the spring, completely does not meet the economic cost benefits, so the footwear industry further introduced an air cushion Body shoes, the basic principle is to put a balloon filled with compressed gas on the bottom of the shoe, the balloon is like a balloon full of air, can absorb shock, and is not easy to rupture or flatten; in order to match different movements, the airbag The size and placement are also different. Usually the heel and forefoot are more stressed, so a larger air cushion is required for support.

However, when the air cushion body is pressed by the body air pressure and the foot for a long time, the internal gas will gradually disappear, resulting in the shoe not being able to provide the proper cushioning effect of the foot. In addition, when the air cushion of the air cushion body loses its effect, the foot The ministry will be hidden in the shoes for a long time, and the air cushion itself is a kind of rubber material, which causes the air to be unable to circulate and ventilate, resulting in odor and moisture in the foot and the shoes, thereby affecting the quality of the skin or shoes of the foot. And so on, the final wearer must eliminate the whole pair of shoes, so the price of shoes is not eliminated due to the generation of odor and moisture is not economical.

In view of the above-mentioned missing items in the various shoes, the inventors have devoted a lot of time to researching relevant knowledge, and comparing various advantages and disadvantages, and conducting research and development of related products, and after many experiments and tests, Finally, the introduction of a "shoe-equipped shoe device" is to improve the above-mentioned description to meet the needs of the public.

The main object of the present invention is to provide a wearer who can effectively absorb the moisture and odor generated in the shoe when the foot is in the shoe for a long time, so that the foot is in a clean space and avoid the lesion of the foot skin. Improve the design of the air cushion shoes between the air cushion and the shoes. Because there is no proper air permeability, and the air cushion is made of rubber material, the foot is prone to moisture and odor when worn in the shoes for a long time. In turn, it affects the skin of the foot and other issues.

To this end, the inventors of the present invention have in order to improve the above-mentioned numerous deficiencies and achieve the above-described objects and effects described in the present invention. The present invention provides an air-cushioned shoe device comprising: a shoe body having a seating chamber And a hole is provided at one end of the tolerance chamber; an air cushion body is disposed at the bottom of the tolerance chamber, the air cushion body includes a front pad, a compression cylinder pad and a pressure regulating valve, the front pad system Located in the front half of the tolerance chamber and corresponding to the forefoot of the foot, the front pad has a conduit portion and an airbag portion surrounding the conduit portion, the conduit portion is provided with a plurality of inlets, and the compression cylinder gasket is installed In the second half of the foot chamber, and corresponding to the rear heel of the foot, a first air pipe is further connected to the conduit portion and the compression cylinder pad, and a second air pipe is connected to the compression cylinder pad and the air bag portion, and the pressure regulating valve system is further The utility model is disposed on the outer peripheral side of the shoe body, and one end thereof protrudes into the tolerance chamber. The end of the pressure regulating valve protruding from the footrest chamber includes an inlet passage and a discharge passage, and the end exposed on the side of the shoe body Then has a steering knob, wherein the inlet A third air pipe is connected to the second air pipe, and the unloading road portion is connected to one end of the fourth air pipe, and the other end is exposed by the side of the shoe body; and an insole is mounted on the shoe body. Indoor, and covered by the air cushion body; wherein, the wearer uses the front and back pedaling of the foot relative to the air cushion body to control the moisture and odor generated by each inlet in the tolerance chamber, and the unloading channel through the pressure regulating valve The fourth trachea is discharged, so that the accommodation room is kept clean and dry, so as to avoid the effects and purposes of avoiding skin lesions on the foot.

A further technical feature of the present invention is that the first air pipe and the second air pipe are further provided with a plurality of one-way valves, each of the one-way valves controls the flow of the gas in the compressed cylinder gasket to fill the airbag portion, and the conduit portion sucks the fluid to Compress the flow in the cylinder head.

A further technical feature of the present invention is that a pressure relief valve is further disposed on a circumferential side of the shoe body, and one end of the pressure relief valve protrudes from the tolerance chamber, and a fifth air pipe is connected to the pressure relief valve. One end of the chamber, and the other end of the fifth trachea Then, the second air pipe is connected to the front pad position, and the pressure relief valve can be discharged and reduced when the air bag portion of the front pad is filled with too much gas, so that the pressure of the front and rear air cushions can be changed, and the elasticity is relatively changed.

A further technical feature of the present invention is that the pressure relief valve is exposed on the outer end surface of the shoe body, and further comprises a pressure button, the pressure button is elastically mounted on the pressure relief valve, and blocks the gas of the airbag portion of the front pad. .

A further technical feature of the present invention is that a control knob of the pressure regulating valve further has a groove recessed in the outer end surface, and a tooth row is arranged around the outer peripheral surface, and the groove and the tooth row are arranged to provide a stable rotation of the wearer. The pressure between the air cushion body and the compression cylinder head is mobilized, and the fluid is discharged outside the shoe through the fourth air tube.

A further technical feature of the present invention is that a buffer spring is further disposed in the compression cylinder pad, the two ends of the buffer spring respectively abut against the top and bottom ends of the compression cylinder pad, and the control fluid is stepped on the rear heel of the foot. The trend.

A further technical feature of the present invention is that a discharge port is further disposed on the outer peripheral side of the shoe body and corresponding to the fourth air pipe, and one end of the fourth air pipe is inserted at the discharge port and guides the pipe portion of the front pad to be sucked The fluid is discharged from the discharge port.

Combining the above technical features described in the present invention, the advantage is that the foot pad and the rear heel are stepped on the front pad and the compressed cylinder pad before the foot passes, so that the duct portion of the front pad can absorb the moisture in the foot cavity, The odor, as well as the gas filling the airbag portion, guides the sucked moisture and odor through the setting of the pressure regulating valve to the fourth air pipe, and finally discharges the outer body of the shoe through the guide of the fourth air pipe, thereby maintaining the capacity The foot room is clean and dry, avoiding the skin lesions caused by infection of the foot, and the air pressure can be adjusted according to the needs of each person, and the most comfortable elasticity can be achieved. The air pressure can be freely set from 0 psi to 20 psi. It is also possible to replace the air cushion separately without having to disassemble the upper and the outsole The entire set of air cushions will be updated directly from the shoes. Therefore, the present invention can be said to be a practical and progressive creation, which is quite worthy of promotion by the industry and is publicized to the public.

1‧‧‧Shoe body

11‧‧‧容容室

12‧‧‧ wearing a mouth

13‧‧‧Drainage

2‧‧‧Air cushion body

21‧‧‧ front pad

211‧‧‧Drainage Department

212‧‧‧Airbag Department

213‧‧‧ Import

22‧‧‧Compressed cylinder head gasket

221‧‧‧buffer spring

23‧‧‧pressure regulator

231‧‧‧ entrance road

232‧‧‧Unloading Road

233‧‧‧ steering knob

2331‧‧‧ channel

2332‧‧‧ teeth row

3‧‧‧First trachea

4‧‧‧second trachea

5‧‧‧ Third trachea

6‧‧‧fourth trachea

7‧‧‧ insole

8‧‧‧ check valve

9‧‧‧Relief valve

91‧‧‧ Press button

10‧‧‧ fifth trachea

The first figure is a perspective view of the present invention.

The second figure is a partial perspective perspective view of the shoe body of the present invention.

The third figure is a partial perspective view of the air cushion body of the present invention installed in the shoe body.

The fourth figure is a schematic diagram of the side movement of the internal fluid flow direction after the compression cylinder head gasket of the present invention is pressed.

The fifth figure is a top view schematically showing the flow direction of the internal fluid after the compression cylinder head gasket of the present invention is pressed.

The sixth figure is a schematic diagram of the side movement of the internal fluid flow direction after the compression of the cylinder head gasket is pressed.

The seventh figure is a top view schematically showing the flow direction of the internal fluid after the compression cylinder head of the present invention is pressed.

The eighth figure is a partial perspective schematic view of the present invention with a pressure relief valve on the side of the shoe body.

In order to clearly illustrate the above objects and effects, the present invention relates to a shoe device with an air cushion, with respect to the techniques, means and achievable effects thereof, a preferred embodiment and detailed drawings Explain later. The present invention is described in a preferred embodiment, and is not intended to limit the invention in any way. Referring to the first to third figures, the present invention provides an air-cushioned shoe device comprising: a shoe body 1, It has a tolerance chamber 11 , and at the end of the tolerance chamber 11 is provided a through opening 12 for providing a foot into the tolerance chamber 11 , and the shoe body 1 has an upper, Outsole The midsole of the shoe is a conventional technique, and is not described here. An air cushion body 2 is installed at the bottom of the tolerance chamber 11, and the air cushion body 2 includes a pad 21 and a compression cylinder pad 22 in a sheet shape. And a pressure regulating valve 23, the front pad 21 is located in the front half of the footrest chamber 11, and corresponds to the forefoot of the foot, and the front pad 21 has a duct portion 211 and an airbag portion 212 surrounding the duct portion 211. The conduit portion 211 is provided with a plurality of inlets 213, and each of the inlets 213 is spaced (the second figure has three inlets 213), and the compression cylinder gasket 22 is installed in the second half of the tolerance chamber 11 And corresponding to the rear heel of the foot, further comprising a first air pipe 3 communicating with the conduit portion 211 and the compression cylinder pad 22, a second air pipe 4 communicating with the compression cylinder pad 22 and the air bag portion 212, and the pressure regulating valve 23 It is mounted on the outer peripheral side of the shoe body 1 and has one end protruding into the housing chamber 11. The pressure regulating valve 23 protrudes from one end of the tolerance chamber 11 and includes an inlet passage 231 and a discharge passage 232. One end of the side of the shoe body 1 has a steering knob 233, wherein the inlet duct 231 is connected to a third air pipe 5 connected to the second The tube 4 is connected to one end of a fourth air tube 6 at the unloading path 232, and the other end is exposed by the side of the shoe body 1; an insole 7 of the same size as the transverse section of the foot chamber 11 is mounted. It is disposed in the tolerance chamber 11 of the shoe body 1 and covers the air cushion body 2; wherein the wearer uses the front and back pedaling of the foot relative to the air cushion body 2 to control the suction of each inlet 213 in the tolerance chamber 11 The fluid (which is referred to as moisture, odor, moisture, etc.) is discharged through the discharge port 232 and the fourth air pipe 6 of the pressure regulating valve 23, so that the inside of the tolerance chamber 11 is kept clean and dry, It achieves the effects and purposes of avoiding skin lesions on the feet.

The foregoing is a main technical feature of the main embodiment of the present invention, which corresponds to the content of the first item of the patent application scope of the present application, and the object and the implementation form of the present invention are known in detail, and the technical features described in the remaining subsidiary patent scopes are The scope of patent application is the first The detailed description of the content of the item or the additional technical features, rather than limiting the scope of the first item of the patent application scope, should be understood that the first item of the patent application scope of the present application does not necessarily include the technical features described in the scope of the remaining subsidiary application.

After the wearer's foot is worn in the tolerance chamber 11 of the shoe body 1, the foot moves on the walking, running, and the like, and the front pad 21 and the compression cylinder pad 22 are driven to be pressed. First, please see As shown in the fourth and fifth figures, when the compression cylinder head 22 is subjected to the pressing force of the rear heel of the foot, the fluid originally stored in the compression cylinder head 22 enters via the inlet passage 231 of the pressure regulating valve 23. Then, the discharge port 232 and the fourth air pipe 6 are discharged, so as to keep the inside of the tolerance chamber 11 dry and clean; then, as shown in the sixth figure and the seventh figure, when the wearer When the portion of the forefoot is stepped on the front pad 21 and the heel is momentarily released against the force of compressing the cylinder head 22, the elastic recovery of the compression cylinder head 22 generates suction, so that there is no air flowing through the foot and the tolerance chamber 11 The moisture and odor caused by the characteristics can be sucked into the compression cylinder pad 22 through the inlets 213 of the duct portion 211 for storage, for example, when the foot chamber 11 in the shoe body 1 is accidentally rain or dirty water enters. When the foot is stepped on, the rainwater and dirty water can be sucked from the inlet 213 to the pressure. In the cylinder head gasket 22, the fourth air pipe 6 is discharged, so that rainwater and dirty water in the tolerance chamber 11 can be discharged outside the shoe body 1 to maintain the dryness and the foot in the tolerance chamber 11. Comfortable.

According to the above-mentioned steps of stepping on the front pad 21 and compressing the cylinder head 22, respectively, the continuous operation is as shown in the fourth to seventh figures (the arrow is the flow direction of the fluid), when the wearer wears After the foot wears the shoe body 1, it runs, jumps, and walks, and the foot pad 21 and the compression cylinder pad 22 are alternately stepped through the habitual action of the foot. When the rear heel is stepped on the compression cylinder pad 22, it will first Located in the compression cylinder head 22 The fluid enters through the second gas pipe 4 to the third gas pipe 5, and further enters through the inlet passage 231 of the pressure regulating valve 23. The pressure regulating valve 23 is designed to discharge the fluid from the discharge port 232, and the fourth gas pipe 6 is used to guide the flow. Leading out of the shoe body 1, and part of the gas is shunted out due to the internal pressure and flows into the air bag portion 212 through the second air pipe 3 to be filled (shown by the dotted arrow in the fifth figure); then the hind heel of the foot is released. When the force of the cylinder head 22 is compressed, and the front foot 21 is stepped on the front pad 21, since the compression cylinder head 22 has moderate elasticity, the stepping of the rear heel makes the compression cylinder pad 22 elastically reset by itself, and the momentary resetting occurs. A certain suction force is generated, so that the fluid in the tolerance chamber 11 can be sucked into the conduit portion 211 through the insole 7 through the insole 7 through the suction, and guided along the pipeline of the first air tube 3 to The cylinder block 22 is stored in the compression cylinder block, and the air cushion body 2 is continuously and continuously slid and continuously jumped out of the shoe body 1 through the continuous rotation before and after the continuous rotation. To make the foot Enough is within 11 relatively dry, clean room full capacity, reduce foot skin lesions.

However, in order to effectively absorb the fluid in the foot chamber 11 and discharge the shoe body 1, the detailed parts thereof are extremely important, wherein the first air pipe 3 and the second air pipe 4 are further provided with a plurality of one-way one-way. The valve 8, as shown in the second and third figures, is provided with a check valve 8 on the first gas pipe 3 at one end near the conduit portion 211 and one end near the compression cylinder pad 22, and the second gas pipe 4 is close to One end of the air bag portion 212, one end adjacent to the compression cylinder head 22, and a position connecting the third air pipe 5 are respectively provided with a check valve 8 through which the backflow of the fluid can be completely avoided, and the guide is surely guided. In addition to blocking the discharge of the fluid, a check valve 8 is also disposed at one end of the fourth air tube 6 for discharging the fluid from the shoe body 1. The main function is to prevent outside air from entering the air cushion body from one end of the fourth air tube 6 In addition, in another embodiment, a pressure relief valve 9 for discharging the gas in the airbag portion 212 at any time is further disposed on the circumferential side of the shoe body 1, please refer to the eighth figure. An end of the pressure relief valve 9 protrudes from the outer chamber 11 and the other end is exposed on the outer peripheral side of the shoe body 1. The exposed end surface is further provided with a pressing button 91. The pressing button 91 is elastically mounted. The pressure relief valve 9 is further provided with a fifth air pipe 10 connected to the pressure relief valve 9 at one end of the tolerance chamber 11 , and the other end of the fifth air pipe 10 is connected to the second air pipe 4 adjacent to the front pad 21 . The check valve 8 is such that when the gas in the air bag portion 212 is filled with excess gas by the stepping of the rear heel by the compression cylinder pad 22, the wearer can open the fifth by pressing the push button 91. The external communication of the air tube 10 allows the gas in the air bag portion 212 to be discharged outward through the fifth air tube 10 to control the adjustment of the amount of gas in the air bag portion 212 and to reach the most step of the foot before the wearer's foot Good comfort, in addition, the design of the push button 91 can also be used to block the airbag portion 212. The disappearance of the gas (the connection between the airbag portion 212 and the second air tube 4 in the eighth diagram is different from the previous embodiment in that the previous embodiment has a single valve 8, and the present embodiment is a two-sided The gas valve can be circulated, so that the gas in the air bag portion 212 can be efficiently discharged to the deflation valve 9 via the fifth air pipe 10 to adjust the amount of gas in the air bag portion 212.

Then, in the design of the pressure regulating valve 23, the main function is to provide the wearer with the ability to adjust the air pressure value of the air cushion body 2, so that the foot can achieve the best buffering effect on the wearing shoe body 1, and therefore in the pressure regulating valve 23 The control knob 233 portion further has a groove 2331 recessed in the outer end surface, and a tooth row 2332 is surrounded on the outer peripheral surface. The arrangement of the channel 2331 and the tooth row 2332 allows the wearer to stabilize and adjust the steering knob 233. , allowing the air cushion body 2 to increase or decrease its internal pressure according to the adjustment of the pressure regulating valve 23, and further according to the wearer's preference. And a buffer spring 221 is further disposed in a portion of the cylinder head 22, and the two ends of the buffer spring 221 respectively respectively abut against the top and bottom ends of the compression cylinder pad 22, and the buffer spring of the present invention The 221 design is configured in a double scroll shape as a preferred embodiment, that is, the buffer spring 221 has a shape in which the lateral cross-sectional area of both ends is larger and the central portion is gradually smaller. The buffer spring 221 can provide the compression cylinder pad 22 . The elastic force recovered after being pressed, and ready for the next forced pressing, and the elasticity of the compressed cylinder head 22 can be changed by the adjustment of the pressure regulating valve 23 to change the internal elasticity, in addition to the adjustment of the buffer spring 221, see The first, second, third, fourth and sixth figures are shown.

In addition, it is worth mentioning that the portion of the fluid discharged in the present invention can be discharged on the outer peripheral side of the shoe body 1 and corresponding to the fourth air pipe 6 in addition to being exposed to the outer side of the shoe body 1 at one end of the fourth air pipe 6. A discharge port 13 is opened to communicate with the foot chamber 11, and the fourth air tube 6 is inserted into the discharge port 13 and does not need to be exposed outside the shoe body 1. In addition to maintaining the discharge fluid, the fan tube can be further maintained. For the appearance integrity of the entire shoe body 1, please refer to the second and third figures.

The invention adopts the design of the air cushion body 2 and cooperates with the pedaling on the foot, so that the wearer can make the foot more in the dry and clean tolerance chamber 11 for a long time, and enable the foot to withstand walking and running. The force to protect the safety and hygiene of the foot, and also through the combination of the pressure regulating valve 23, the pressure relief valve 9, the buffer spring 221 and the discharge port 13, the use of the complete air cushion body 2, so that the wearer can The pressure of the air cushion body 2 is adjusted according to the action to be performed by the foot of the foot, thereby achieving the optimal wearing comfort of the shoe, and the present invention is more substantively advanced than the lack of the prior art.

The above is only a preferred embodiment for explaining the present invention, and is not It is intended that the invention be construed as being limited in any form, and that any modification or alteration of the invention in the spirit of the All should still be included within the scope of the intended protection of the invention.

In summary, the "shoe-equipped shoe device" of the present invention is practically and cost-effectively and fully meets the needs of industrial development, and the disclosed structural invention has an unprecedented innovative structure, so that it has "Newty" should be taken care of, and the invention can be more effective than the conventional structure. Therefore, it is also "progressive". It fully complies with the requirements of the application requirements for invention patents in China's Patent Law. And please ask the bureau to review it early and give it affirmation.

Claims (7)

An air cushioned shoe device comprising: a shoe body having a tolerance chamber, and a mouthpiece at one end of the tolerance chamber; and an air cushion body mounted at the bottom of the tolerance chamber, the air cushion The body includes a front pad, a compression cylinder pad and a pressure regulating valve. The front pad is located in the front half of the footrest chamber and corresponds to the forefoot of the foot, and the front pad has a conduit portion and a surrounding portion of the conduit portion. The airbag portion is provided with a plurality of inlets, and the compression cylinder gasket is installed in the second half of the tolerance chamber, and corresponds to the rear heel of the foot, and further a first air tube is connected to the conduit portion and the compression cylinder gasket a second air pipe is connected to the compressed cylinder head and the air bag portion, and the pressure regulating valve is mounted on the outer peripheral side of the shoe body, and one end thereof protrudes into the tolerance chamber, and the pressure regulating valve protrudes from the foot chamber One end includes an inlet passage and a discharge passage, and one end exposed to the side of the shoe body has a steering knob, wherein the inlet passage is connected with a third air pipe connected to the second air pipe, and the unloading port is connected to the first air pipe. One end of the fourth trachea, the other end is penetrated by the side of the shoe body An insole is installed in the tolerance chamber of the shoe body and covered on the air cushion body; wherein the wearer uses the front and back pedaling of the foot relative to the air cushion body to control the moisture generated by the plurality of inlets in the tolerance chamber With the odor, and discharged through the discharge port of the pressure regulating valve and the fourth air pipe, the accommodation room is kept clean and dry, so as to avoid the effect and purpose of avoiding skin lesions on the foot. The air-cushioning shoe device according to claim 1, wherein the first air pipe and the second air pipe are further provided with a plurality of one-way valves, each of which controls the gas in the compression cylinder gasket to be filled into the air bag. The flow direction of the portion and the direction in which the conduit portion draws fluid into the compression cylinder head. According to the air-cushioned shoe device described in claim 2, further A pressure relief valve is disposed on a circumferential side of the shoe body, and one end of the pressure relief valve protrudes from the tolerance chamber, and a fifth air pipe is connected to one end of the pressure relief valve at the tolerance chamber, and the fifth The other end of the trachea is connected to the second air pipe near the front pad position, and the pressure relief valve can be discharged and reduced when the air bag portion of the front pad is filled with excessive gas. According to the air-cushioned shoe device of claim 3, the pressure relief valve is exposed on the outer end surface of the shoe body and further provided with a pressing button, which is elastically mounted on the pressure relief valve and blocks The gas of the airbag portion of the front pad is discharged. The air-cushioning shoe device according to claim 1, wherein the control knob of the pressure regulating valve further has a groove recessed in the outer end surface, and a tooth row is arranged around the outer circumferential surface, the channel and the groove The teeth are arranged to provide a stable rotation of the wearer to mobilize the pressure between the air cushion body and the compression cylinder head, and discharge the fluid out of the shoe through the fourth air tube. The air-cushioning shoe device of claim 1, wherein the compression cylinder pad is further provided with a buffer spring, and the two ends of the buffer spring respectively abut against the top and bottom ends of the compression cylinder pad. The movement of the control fluid is stepped on the heel of the foot. The air-cushioning shoe device according to claim 1, wherein a discharge port is further disposed on an outer peripheral side of the shoe body and corresponding to the fourth air pipe, and one end of the fourth air pipe is inserted at the discharge port. And the fluid sucked by the conduit portion of the front pad is discharged from the discharge port.