WO2005039341A1

WO2005039341A1 - Shoe for shock absorption and airing function

Info

Publication number: WO2005039341A1
Application number: PCT/KR2004/002709
Authority: WO
Inventors: Songjo Lim
Original assignee: Songjo Lim
Priority date: 2003-10-23
Filing date: 2004-10-23
Publication date: 2005-05-06
Also published as: KR200341100Y1

Abstract

A shoe having shock, absorption and aerating functions is disclosed. The shoe includes an upper, a sole having a midsole and an outsole, and an air inlet unit that is provided at a front portion of the upper and has an air inlet passage. The shoe further includes a first air passage (130) which is provided in the sole and communicates with the air inlet passage. An elastic unit (190) is installed between a rear portion of the midsole and a rear portion of the outsole and elastically expands or contracts due to external pressure to absorb shocks. The elastic unit provides a pumping space (200) between the outsole and the midsole. A second air passage (140) is provided in the sole and coupled to the pumping space. The shoe allows external fresh air to flow in and out of the shoe and absorbs shocks, using the elastic unit.

Description

[DESCRIPTION]

[Invention Title] SHOE FOR SHOCK ABSORPTION AND AIRING FUNCTION

[Technical Field] The present invention relates, in general, to shoes having shock absorption and aerating functions and, more particularly, to a shoe having shock absorption and aerating functions, which allows fresh air to flow in and out of the shoe when a user walks or runs with the shoe on, and absorbs shocks when the shoe contacts the ground surface.

[Background Art] Generally, shoes function to protect human feet. That is, when a person runs or walks with shoes on, the shoes cover the person's feet and thereby protect the feet from the exterior. The conventional shoes are made of leather or synthetic resin which has poor ventilation. Thus, when a person wears the shoes for a lengthy period of time, air does not circulate in the shoes, thus increasing the temperature in the shoes. Thereby, moisture accumulates in the shoes due to sweat, and the shoes become moldy because of the moisture, thus resulting in a bad smell or dermatophytosis. In order to address the problems, various air-circulating shoes have been proposed. Among them, some shoes will be described below in brief. The structure of air-circulation for an outsole is disclosed in Korean U.M.

Registration No. 20-144133. According to the cited document, a pumping unit is separately provided to circulate external air to the outsole. However, the conventional shoe is problematic in that the structure is complicated, natural air circulation is impossible, and foreign materials may undesirably enter the shoe Further, a shoe cushion having a plurality of ventilation holes is disclosed in Korean

U M Registration No 20-218227 According to the cited document, air is circulated to a lower portion of an outsole using air tubes However, the conventional shoe is disadvantageous in that the structure is complicated, natural air circulation is impossible, and foreign materials may undesirably enter the shoe, like the above-mentioned shoe A shoe having a ventilation device is disclosed in Korean U M Registration No 20- 229738 According to this document, the shoe includes a cushion layer having a pumping function and a check valve, thus allowing air to circulate to a lower portion of the shoe

However, the conventional shoe has the same problems as those of the above-mentioned shoes That is, the structure of the shoe is complicated, natural air circulation is impossible, and foreign materials may undesirably enter the shoe Further, air-circulating and shock-absorbing footwear using a reinforcing member is disclosed in Korean U M Laid-Open Publication No 1993-10222 The conventional shoe can absorb shocks However, the shoe has a problem in that fresh air cannot flow into the shoe Furthermore, a shoe with a ventilating opening is disclosed in Korean U M

Registration No 327676, which was filed by the inventor of this invention The conventional shoe is advantageous in that fresh air can flow in and out of the shoe

However, the conventional shoe has a problem in that its ability to absorb shocks is insufficient

[Disclosure] [ Technical Problem ] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a shoe having shock absoφtion and aerating functions, which absorbs shocks that are transmitted from the ground surface when a user walks or runs, and allows fresh air to flow in and out of the shoe, thus facilitating air circulation.

[Technical Solution] In order to accomplish the above object, the present invention provides a shoe having shock absorption and aerating functions, including an upper, a sole having a midsole and an outsole, and an air inlet unit that is provided at a front portion of the upper and has an air inlet passage so that external air flows along the air inlet passage, the shoe further including a first air passage provided in the sole, and communicating with the air inlet passage so that the air fed into the air inlet passage flows along the first air passage; an elastic unit installed between a rear portion of the midsole and a rear portion of the outsole, and elastically expanded or contracted by external pressure to absorb shocks, the elastic unit providing a pumping space between the outsole and the midsole to communicate with the first air passage; and a second air passage provided in the sole and coupled to the pumping space, with a hole being provided at a predetermined position on the second air passage to communicate with an interior of the upper, thus feeding air into the upper when the elastic unit is compressed. A lower surface of the rear portion of the midsole of the sole is upwardly recessed to provide a first recess, and an upper surface of the rear portion of the outsole of the sole is downwardly recessed to provide a second recess. The first air passage further includes a first check valve to restrict a flow of air to a single direction so that the air flows from the air inlet passage to the pumping space, and the hole of the second air passage further includes a second check valve to limit a flow of air to a single direction so that the air flows from the pumping space into the upper. The elastic unit has a shape of a bellows, with an upper portion of the elastic unit being attached to a lower portion of the first recess, and a lower portion of the elastic unit being attached to an upper portion of the second recess, so that the pumping space is defined inside the bellows. The elastic unit has a shape of a bent hose, the bent hose being closed at an end thereof while being filled with air, with an upper surface of the bent hose being attached to a lower portion of the first recess, and a lower surface of the bent tube being attached to an upper portion of the second recess, so that a space, defined between a lower surface of the midsole and an upper surface of the outsole and isolated from an exterior by the elastic unit, serves as the pumping space. The elastic unit comprises many bellows coupled to each other by coupling tubes, with an upper portion of each of the bellows being attached to a lower portion of the first recess, and a lower portion of each of the bellows being attached to an upper portion of the second recess, so that the pumping space is defined inside the bellows. The elastic unit has a shape of a bellows, with an upper portion of the elastic unit being attached to a lower portion of the first recess, and a lower portion of the elastic unit being attached to an upper portion of the second recess, so that the pumping space is defined inside the bellows, and a cut part is provided on the outsole to be moved up and down. The shoe further includes an auxiliary elastic unit having a shape of a bellows and installed in the pumping space. An upper portion of the auxiliary elastic unit is attached to a lower portion of the first recess, and a lower portion of the auxiliary elastic unit is attached to an upper portion of the second recess, and a through hole is provided at a predetermined position on the auxiliary elastic unit to communicate with the pumping space.

[Advantageous Effects] According to the present invention, fresh air flows in and out of a shoe by the expansion and contraction of an elastic unit, and shocks generated when the shoe contacts the ground surface are absorbed by the elasticity of the elastic unit

[Description of Drawings] FIG 1 is an exploded perspective view of a shoe having shock absoφtion and aerating functions, according to the first embodiment of the present invention, FIG 2 is a perspective view to show an elastic unit of a shoe, according to a modification of the first embodiment, FIG 3 is a vertical sectional view to show the flow of air when the elastic unit of the first embodiment expands and contracts, FIG 4 is a perspective view to show an elastic unit of a shoe, according to the second embodiment of the present invention, FIG 5 is a vertical sectional view to show important parts of the shoe when the elastic unit of the second embodiment expands and contracts, FIG 6 is a perspective view of an elastic unit of a shoe, according to the third embodiment of the present invention, FIG 7 is a vertical sectional view to show important parts of a shoe, according to the fourth embodiment of the present invention, FIG 8 is a vertical sectional view to show important parts of a shoe, according to the fifth embodiment of the present invention, and FIG 9 is a vertical sectional view to show important parts of a shoe, according to the sixth embodiment of the present invention <Description of reference characters of important parts> 100 upper 110 sole 111 midsole 112 outsole 113 protective steps 1 14 cut part 120 air inlet unit 121 air inlet port 122 air inlet passage 130 first air passage 140 second air passage 141 hole 150 first check valve 160 second check valve 170 first recess 180 second recess 190 elastic unit 191 inlet 192 outlet 193 coupling tubes 194 auxiliary elastic unit 194a through hole 200 pumping space

[Best Mode] This invention will be described in detail by way of example with reference to the accompanymg drawings <FIRST EMBODIMENT FIG 1 is an exploded perspective view of a shoe having shock absoφtion and aerating functions, according to the first embodiment of the present invention, FIG 2 is a perspective view to show an elastic unit of a shoe, according to a modification of the first embodiment, and FIG 3 is a vertical sectional view to show the flow of air when the elastic unit of the first embodiment expands and contracts As shown in the drawings, the shoe having shock absorption and aerating functions according to the present invention includes an upper 100, a sole 110, an air inlet unit 120, a first air passage 130, a second air passage 140, a first check valve 150, a second check valve 160, a first recess 170, a second recess 180, and an elastic unit 190 First, the upper 100 will be described below in detail The upper 100 defines an external appearance of the shoe. An inner covering may be attached to a lower surface of the upper 100, as necessary. When the inner covering is attached to the upper 100, a hole is formed on the upper 100 to communicate with a hole 141 of the second air passage 140 that will be described later in detail. Thus, air fed into the second air passage 140 flows into the upper 100 through the holes. Further, the air inlet unit 120, described later in detail, is provided on a front portion of the upper 100, that is, a toe region of the shoe. In this case, the upper 100 is known to those skilled in the art, so that it will not be described herein in detail. The air inlet unit 120 extends from a front end of the sole 110 to a predetermined position. A rear surface of the air inlet unit 120 is attached to the front portion of the upper 100. The air inlet unit 120 has an air inlet port 121 to allow external air to flow into the shoe. An air inlet passage 122 is provided in the air inlet unit 120, so that the air passing through the air inlet port 121 flows along the air inlet passage 122. Further, the air inlet passage 122 is provided to communicate with the first air passage 130 of the sole 110 which will be described later in detail, so that the air fed into the air inlet port 121 flows into the first air passage 130. Preferably, the air inlet unit 120 is integrated with the sole 1 10. However, in the case of dress shoes, the air inlet unit 120 may be provided separately from the sole 110. In this case, the air inlet unit 120 is mounted to the front portion of the sole 110. The sole 110 includes a midsole 111 and an outsole 1 12. The midsole 1 1 1 is attached to an upper surface of the outsole 1 12, and the upper 100 is attached to an upper surface of the midsole 111. In this case, a region between a front portion and a middle portion of the midsole 111 is coupled to a region between a front portion and a middle portion of the outsole 112. Meanwhile, a rear portion of the midsole 111 is separated from a rear portion of the outsole 112. The first air passage 130 is defined in the region where the midsole 1 1 1 is coupled to the outsole 112 and extends from the front portion to the middle portion of the sole 1 10. A front portion of the first air passage 130 communicates with the air inlet passage 122 of the air inlet unit 120, while a rear portion of the first air passage 130 communicates with the first and second recesses 170 and 180 that will be described later in detail. The first check valve 150 is installed at a position in the first air passage 130. The first check valve 150 automatically restricts the flow of air to a single direction, so that the air flows from the air inlet port 121 to the first air passage 130. Further, a lower surface of a rear portion of the midsole 1 11 is upwardly recessed to form the first recess 170 having a predetermined area. The first recess 170 is provided so that the depth thereof increases toward a rear end of the first recess 170. Further, an upper surface of a rear portion of the outsole 112 is downwardly recessed to form the second recess

180 having a predetermined area. The second recess 180 is provided so that the depth thereof increases toward a rear end of the second recess 180. The elastic unit 190 is installed in a space defined between the first and second recesses 170 and 180. In this case, steps are formed between the first recess 170 and a surface of the midsole 111, and between the second recess 180 and a surface of the outsole 112. Each of the steps serves as a protective step 113 to prevent the elastic unit 190 from becoming dislodged and separated from the shoe. Further, the second air passage 140 is provided in the region where the midsole 11 1 is coupled to the outsole 1 12. The second air passage 140 communicates with the first and second recesses 170 and 180 and extends forward from an edge of the first and second recesses 170 and 180. A space having a predetermined width is formed on a front end of the second air passage 140. The hole 141, communicating with the space, is bored through the midsole 111 and communicates with the interior of the upper 110. Further, the second check valve 160 is provided in the hole 141. The second check valve 160 restricts the flow of air to a single direction, thus allowing the air to flow from the second air passage 140 to the interior of the upper 100, and preventing the air from flowing in an opposite direction. The elastic unit 190 has the shape of a bellows which is opened at an end thereof. The elastic unit 190 is installed in a space between the first and second recesses 170 and 180 such that the elastic unit 190 is located between the midsole 11 and the outsole 1 12. Further, an upper surface of the elastic unit 190 is adhered to a lower surface of the first recess 170 of the midsole 111. Meanwhile, a lower surface of the elastic unit 190 is adhered to an upper surface of the second recess 180 of the outsole 1 12. Thus, a space which is defined between the first and second recesses 170 and 180 and surrounded by the elastic unit 190 is isolated from the exterior. Thereby, the space communicates only with the first and second air passages 130 and 140. The space is filled with air to serve as a pumping space 200. In this case, a portion adjacent to a rear end of the midsole 111 having the first recess 170 is spaced apart from a portion adjacent to a rear end of the outsole 1 12 having the second recess 180. Thus, when external pressure is applied to the shoe, the midsole 1 1 1 approaches the outsole 1 12 due to an elastic force of the elastic unit 190. According to the embodiment, the elastic unit 190 is opened at an end thereof.

However, an elastic unit 190 may have no opening, as shown in FIG. 2. Even though the elastic unit 190 has no opening, this elastic unit 190 is installed in the same manner as the elastic unit 190 having the opening. The elastic unit 190 of FIG. 2 is different from the elastic unit 190 of FIG. 1 in that an inlet 191 is provided at a predetermined position on a front surface of the elastic unit 190 to communicate with the first air passage 130, and an outlet 192 is provided at a position spaced apart from the inlet 191 by a predetermined distance to communicate with the second air passage 140. The general construction of the elastic unit of FIG. 2 remains the same as the elastic unit 190 of FIG. 1. In this case, because the areas of the first and second recesses 170 and 180 are large, and the volume of the pumping space 200 defined by the elastic unit 190 having the shape of the bellows is large, a large quantity of air can be stored in the pumping space 200. Thus, when the elastic unit 190 is contracted, a large quantity of air flows into the upper 100 at one time. The operational effects of the shoe constructed as described above will be described below. When a user walks or runs with the shoe on, a lower surface of the outsole 110 contacts the ground. By the contact force of the ground with the sole 110, upward pressure is applied to the lower surface of the outsole 112 of the sole 110. Thereby, the outsole 112 comes close to the midsole 111. At this time, the elastic unit 190 installed between the midsole 1 1 1 and the outsole 112 is elastically contracted by the pressure. Further, air filled in the pumping space 200 is discharged to the outside. However, since the air is discharged only through the second air passage 140, the air stored in the pumping space 200 flows through the second air passage 140 and the second check valve 160 provided on the hole 141 into the upper 100. In this way, external fresh air flows into the upper 100. Meanwhile, when the shoe is released from the ground surface, the elastic unit 190 expands due to the properties thereof. Thus, as soon as the elastic unit 190 expands, the outsole 1 12 moves away from the midsole 111 by a predetermined distance. The volume of the pumping space 200 defined inside the elastic unit 190 is increased, and pressure is lowered. When the pressure of the pumping space 200 is lowered, external air must flow into the pumping space 200. Air, passing through the air inlet port 121 and the first air passage

122, flows through the first check valve 150 and then is fed to the pumping space 20 by a difference in pressure. Thereby, external fresh air is continuously fed into the pumping space 200. As such a process is repeatedly executed, external fresh air flows through the pumping space 200 into the upper 100. Thereby, fresh air is continuously fed into the shoe. Due to the elastic motion of the elastic unit 190, external shocks are adequately absorbed.

[Mode for Invention] <SECOND EMBODLMENT> FIG. 4 is a perspective view to show an elastic unit of a shoe, according to the second embodiment of the present invention, and FIG. 5 is a vertical sectional view to show important parts of the shoe, when the elastic unit of the second embodiment expands and contracts. As shown in the drawings, the shoe of the second embodiment is almost the same as that of the first embodiment except for the shape of the elastic unit 190. According to the second embodiment of the present invention, the elastic unit 190 comprises a U-shaped hose that is closed at both ends thereof. Further, the elastic unit 190 is closed and filled with air. Like the first embodiment, the elastic unit 190 is installed in a space defined between the first and second recesses 170 and 180. The upper surface of the elastic unit 190 is adhered to the lower surface of the midsole 111, while the lower surface of the elastic unit 190 is adhered to the upper surface of the outsole 112. Thus, the space, defined between the first and second recesses 170 and 180 in which the elastic unit 190 is installed, is isolated from the exterior. The space serves as the pumping space 200. When the elastic unit 190 elastically contracts due to external pressure, fresh air is fed into the upper 100 and simultaneously external shocks are absorbed. The general construction and operational effects of the shoe according to the second embodiment remain the same as those of the first embodiment. <THIRD EMBODIMENT FIG. 6 is a perspective view of an elastic unit of a shoe, according to the third embodiment of the present invention. As shown in the drawing, the shoe of the third embodiment is equal to that of the first embodiment, except for the shape of the elastic unit 190. The elastic unit 190 according to the third embodiment of the present invention has the shape of a bellows, like that of the first embodiment. However, the elastic unit 190 of the third embodiment comprises many small bellows that are coupled to each other by coupling tubes 193. The elastic unit 190 is installed in a space defined between the first and second recesses 170 and 180. An upper surface of the elastic unit 190 is adhered to the lower surface of the midsole 111, while a lower surface of the elastic unit 190 is adhered to an upper surface of the outsole 112. The bellows of the elastic unit 190 are coupled to each other by the coupling tubes 1 3. Further, one of the bellows communicates with the first air passage 130, while another one of the bellows communicates with the second air passage 140. Thereby, a pumping space 200 is defined inside each bellows of the elastic unit 190. Therefore, external air flows through the first air passage 130 into the elastic unit 190. Next, the air passes through the bellows and is then fed into the upper 100 of the shoe. Simultaneously, the elastic unit 190 absorbs external shocks. The general construction of the third embodiment remains the same as that of the first embodiment. <FOURTH EMBODIMENT FIG. 7 is a vertical sectional view to show important parts of a shoe, according to the fourth embodiment of the present invention. The shoe of the fourth embodiment is almost equal to that of the first embodiment except for the shape of a portion for receiving an elastic unit 190. The elastic unit 190 has the shape of a cylindrical bellows, and is installed in a space defined between the first and second recesses 170 and 180. A space defined inside the elastic unit 190 serves as the pumping space 200. Further, a rear end of the midsole 111 is coupled to a rear end of the outsole 12. However, a cut part 114 is provided at a predetermined position on the outsole 1 12. Thus, part of the outsole 112 protrudes downwards. Thus, part of the elastic unit 190 installed between the first and second recesses 170 and 180 is exposed outside the lower end of the outsole 112 along with the cut part 114. Therefore, when a user walks with the shoe on and the shoe contacts the ground surface, the cut part 114 of the outsole 112 moves upward due to upwardly acting pressure.

Simultaneously, the elastic unit 190 is contracted. Meanwhile, when the pressure is released, the cut part 114 moves downward due to the elastic force of the elastic unit 190, so that the cut part 114 protrudes downward. The general construction and operational effects of the fourth embodiment remain the same as those of the first embodiment. <FIFTH EMBODIMENT FIG. 8 is a vertical sectional view to show important parts of a shoe, according to the fifth embodiment of the present invention. The shoe of the fifth embodiment is equal to that of the first embodiment except that the shoe further includes an auxiliary elastic unit 194. The auxiliary elastic unit 194 has the shape of a cylindrical bellows, and is installed in the pumping space 200 that has been described in the first embodiment. An upper portion of the auxiliary elastic unit 194 is adhered to the lower surface of the first recess 170 of the midsole 111, while a lower portion of the auxiliary elastic unit 194 is adhered to the upper surface of the second recess 180 of the outsole 112. Further, a through hole 194a is formed on an outer surface of the auxiliary elastic unit 194 to communicate with the pumping space 200. Thus, the interior of the auxiliary elastic unit 194 also serves as a pumping space 200. The general operational effects of the shoe according to the fifth embodiment remain the same as those of the first embodiment. However, the shoe of the fifth embodiment further includes the auxiliary elastic unit 194, so that external shocks can be more efficiently absorbed. <S1XTH EMBODIMENT FIG. 9 is a vertical sectional view to show important parts of a shoe, according to the sixth embodiment of the present invention. The shoe of the sixth embodiment is equal to that of the second embodiment except that the shoe further includes an auxiliary elastic unit 194. The auxiliary elastic unit 194 has the shape of a cylindrical bellows, and is installed in the pumping space that has been described in the second embodiment. An upper portion of the auxiliary elastic unit 194 is adhered to the lower surface of the first recess 170 of the midsole 111, while a lower portion of the auxiliary elastic unit 194 is adhered to an upper surface of the second recess 180 of the outsole 112. Further, a through hole 194a is formed on an outer surface of the auxiliary elastic unit 194 to communicate with the pumping space 200. Thus, the interior of the auxiliary elastic unit 194 also serves as a pumping space 200. The general operational effects of the shoe according to the sixth embodiment remain the same as those of the first embodiment. However, the shoe of the sixth embodiment further includes the auxiliary elastic unit 194, so that external shocks can be more efficiently absorbed.

[Industrial Applicability] As described above, the present invention provides a shoe having shock absoφtion and aerating functions, which is constructed to allow external fresh air to continuously flow in and out of the shoe, thus preventing a user's foot from becoming wet with sweat, and minimizing the growth of pathogenic bacteria, such as mold. Further, the shoe of the present invention is capable of absorbing shocks generated when the shoe contacts the ground surface, thus allowing a user to walk comfortably, therefore preventing the user from feeling tired. Furthermore, the volume of a pumping space defined in an elastic unit with the shape of a bellows is large, thus allowing a large quantity of air to be stored in the pumping space, and allowing a large quantity of air to flow into an upper at one time when the elastic unit is contracted.

Claims

[CLAIMS] [Claim 1 ] A shoe having shock absoφtion and aerating functions, comprising an upper ( 100), a sole (110) having a midsole (111) and an outsole (112), and an air inlet unit (120) that is provided at a front portion of the upper (100) and has an air inlet passage ( 122) so that external air flows along the air inlet passage, the shoe further comprising: a first air passage (130) provided in the sole (110), and communicating with the air inlet passage (122) so that the air fed into the air inlet passage (122) flows along the first air passage; an elastic unit ( 190) installed between a rear portion of the midsole (111) and a rear portion of the outsole (112), and elastically expanded or contracted by external pressure to absorb shocks, the elastic unit providing a pumping space (200) between the outsole (112) and the midsole (11 1 ) to communicate with the first air passage (130); and a second air passage (140) provided in the sole (110) and coupled to the pumping space (200), with a hole (141) being provided at a predetermined position on the second air passage to communicate with an interior of the upper (100), thus feeding air into the upper (100) when the elastic unit (190) is compressed.

[Claim 2] The shoe according to claim 1, wherein a lower surface of the rear portion of the midsole (1 1 1) of the sole (1 10) is upwardly recessed to provide a first recess (170), and an upper surface of the rear portion of the outsole (112) of the sole (110) is downwardly recessed to provide a second recess (180).

[Claim 3] The shoe according to claim 1 or 2, wherein the first air passage (130) further comprises a first check valve (150) to restrict a flow of air to a single direction so that the air flows from the air inlet passage (122) to the pumping space (200), and the hole (141) of the second air passage (140) further comprises a second check valve (160) to limit a flow of air to a single direction so that the air flows from the pumping space (200) into the upper (100)

[Claim 4] The shoe according to claim 3, wherein the elastic unit (190) has a shape of a bellows, with an upper portion of the elastic unit being attached to a lower portion of the first recess (170), and a lower portion of the elastic unit being attached to an upper portion of the second recess (180), so that the pumping space (200) is defined inside the bellows.

[Claim 5] The shoe according to claim 3, wherein the elastic unit (190) has a shape of a bent hose, the bent hose being closed at an end thereof while being filled with air, with an upper surface of the bent hose being attached to a lower portion of the first recess (170), and a lower surface of the bent hose being attached to an upper portion of the second recess ( 180), so that a space, defined between a lower surface of the midsole (1 1 1) and an upper surface of the outsole (112) and isolated from an exterior by the elastic unit (190), serves as the pumping space (200).

[Claim 6] The shoe according to claim 3, wherein the elastic unit (190) comprises many bellows coupled to each other by coupling tubes, with an upper portion of each of the bellows being attached to a lower portion of the first recess (170), and a lower portion of each of the bellows being attached to an upper portion of the second recess (180), so that the pumping space (200) is defined inside the bellows.

[Claim 7] The shoe according to claim 3, wherein the elastic unit (190) has a shape of a bellows, with an upper portion of the elastic unit being attached to a lower portion of the first recess (170), and a lower portion of the elastic unit being attached to an upper portion of the second recess (180), so that the pumping space (200) is defined inside the bellows, and a cut part (114) is provided on the outsole (112) to be moved up and down.

[Claim 8] The shoe according to claim 4, further comprising: an auxiliary elastic unit (194) having a shape of a bellows and installed in the pumping space (200), with an upper portion of the auxiliary elastic unit being attached to a lower portion of the first recess (170), and a lower portion of the auxiliary elastic unit being attached to an upper portion of the second recess (180), and a through hole (194a) being provided at a predetermined position on the auxiliary elastic unit to communicate with the pumping space (200).

[Claim 9] The shoe according to claim 5, further comprising: an auxiliary elastic unit (194) having a shape of a bellows and installed in the pumping space (200), with an upper portion of the auxiliary elastic unit being attached to a lower portion of the first recess (170), and a lower portion of the auxiliary elastic unit being attached to an upper portion of the second recess (180), and a through hole (194a) being provided at a predetermined position on the auxiliary elastic unit to communicate with the pumping space (200)