32results about How to "Good fit and tightness" patented technology

The invention discloses a precise tiny electric spark processing method for an outer conical surface and an inner conical surface of a needle valve body of an oil nozzle coupling member of a diesel engine, belonging to the technical field of special processing. The precise processing method comprises the following steps of: processing the outer conical surface of the needle valve by adopting a wire electrode moving and processing method, wherein needle valves with different conical angles can be processed through adjusting the moving angle of the electrode or the moving speed of a rotating main shaft mechanism and a wire electrode moving mechanism; and using an another electrode to process the inner conical surface of the needle valve body by adopting the tiny electric spark processing method, wherein the shape of the another electrode is consistent with that of the outer conical surface of the needle valve. The precise tiny electric spark processing method disclosed by the invention has the characteristics of simple processing device, high processing accuracy and high sealing performance of a processed conical surface; and a better processing method is provided to process the needle valve of the oil nozzle coupling member and the conical surfaces of the needle valve body.

The invention relates to a pressure-limiting air escape auxiliary brake valve device with a piston tappet with an end face. The pressure-limiting air escape auxiliary brake valve device comprises a valve body, a disc, a support device, a pressure regulator and a pressure relief opening device, a fixing through hole is arranged on the valve body, a driving shaft penetrates through the fixing hole of the valve body to fix the disc in the valve body, a fixing notch and a support groove are arranged on the disc, the pressure regulator comprises the piston tappet which is a cylinder, one end of the piston tappet passes through the support device to extend into the support groove in a projecting manner, the piston tappet is arranged between the support device and the support groove and receives different air pressure transmitted by the pressure relief opening device for movement, and one end of the piston tappet inserted into the support groove serves as an end face. The pressure-limiting air escape auxiliary brake valve device is compact in structure, and movement stroke of the piston tappet is effectively controlled; exhaust backpressure values of an engine at medium and low speeds are decreased; and small resistance during reciprocation of the piston tappet is guaranteed, an inner spring is prevented from failure caused by high temperature, and accordingly the service life of the auxiliary brake valve device is longer.

The invention discloses a metal rivet nut and a machining process thereof. The metal rivet nut adopts an integrated structure, and comprises a nut head and a riveted pipe, wherein the nut head is positioned at the top end of the riveted pipe; the riveted pipe comprises a riveted pipe upper layer and a riveted pipe lower layer; an internal thread is tapped on the inner wall of the riveted pipe upper layer; and the pipe wall thickness of the riveted pipe lower layer is smaller than that of the riveted pipe upper layer. The machining process comprises the following steps: (1) cutting a metal pipe till a fixed length is reached; (2) selecting one end of the cut metal pipe for reaming; (3) punching the reaming part into a plane, so as to prepare the nut head; (4) machining the internal thread on the inner wall at the end, close to the punched plane, of the cut metal pipe; and (5) carrying out inner wall finishing at the end, far away from the punched plane, of the metal pipe, and skiving the pipe wall at such end, so as to prepare the riveted pipe lower layer. The metal rivet nut and the machining process provided by the invention are applicable to machining of various metal containers, overcome the defect that a metal intercrystalline structure is damaged in a welding process, and are particularly applicable to the inner container and the end cover of a water heater, so that the connector part of the water heater can be long in service life and resistant to corrosion.

The invention relates to a pressure-limiting venting auxiliary brake valve device with an air vent screw plug. The pressure-limiting venting auxiliary brake valve device comprises a valve body, a disk, a support device, a pressure adjusting device, and a pressure relief opening device. A fixed through hole is reserved on the valve body. A drive shaft penetrates the fixed through hole to fix the disk in the inner cavity of the valve body. The pressure adjusting device comprises a shell, a piston tappet, an inner spring and a piston sleeve. The screw plug is in a cup shape. The inner spring is contacted with inner side of the cup bottom. One end of the screw plug near the cup bottom is provided with outer threads by tapping. The screw plug is connected with shell of the pressure adjusting device in a threaded manner. A notch is reserved at the cup opening of the screw plug. At least one air vent is reserved at the cup bottom of the screw plug. The pressure limiting venting auxiliary brake valve device is compact in structure, can effectively control motion travel of the piston tappet and improve exhaust back pressure of an engine at low speed, guarantees low resistance of reciprocating motion of the piston tappet, prevents failure of an inner spring due to high temperature, and enables service life of the auxiliary brake valve device to be prolonged.

The invention relates to a pressure-limit air-leakage auxiliary braking valve device with an air vent of a piston tappet sleeve. The pressure-limit air-leakage auxiliary braking valve device comprises a valve body, a butterfly sheet, a supporting device, a pressure adjusting device and a decompression opening device, wherein the pressure adjusting device comprises the piston tappet sleeve; the piston tappet sleeve comprises a piston tappet part and a piston sleeve part, which are integrally manufactured; the piston tappet part is a cylinder; one end of the piston tappet part convexly extends into a supporting groove through the supporting device, and moves by receiving different air pressures transmitted by the decompression opening device; one end of the piston tappet part, which is inserted into the supporting groove, is an end face; and furthermore, a pressure stabilizing ventilation hole is formed in a valve body at one side of an air inlet cavity, and is communicated with the air inlet cavity and the pressure adjusting device. The pressure-limit air-leakage auxiliary braking valve device provided by the invention has the advantages that the structure is compact; the motion process of the piston tappet sleeve is effectively controlled; the exhaust back pressure value with the low speed in an engine is increased; the resistance is small when the piston tappet sleeve does the reciprocating motion; and an inner spring is prevented from losing efficiency due to a high temperature, so that the service life of the pressure-limit air-leakage auxiliary braking valve device can be long.

The invention provides a four-side buckled storage box capable of being flipped. The four-side buckled storage box comprises a big body, an upper cover, a turning cover and a sealing ring. The four sides of the upper cover are provided with pressing buckles, the pressing buckles can be buckled to a reinforcing rib on the big body, and after the pressing buckles are buckled to the reinforcing rib on the big body, the upper cover and the big body are locked tightly; a through hole is designed in the upper plane of the upper cover, and the through hole can be tightly matched with the turning cover; the upper cover is provided with the turning cover, the turning cover is installed in a positioning slot of the upper cover, the turning cover can be turned open through rotation or buckled through rotation, and when the turning cover is buckled, the through hole in the upper cover is tightly plugged; the lower end of the upper cover is provided with a sealing ring, through the sealing ring, matched sealing performance of the upper cover and the big body is better, and the left part of the big body is provided with a concave arc so that the big body can be held with the hands conveniently when the storage box is used. The four-side buckled storage box capable of being flipped has good sealing performance and is consistent with the design principle of human engineering, and people can use the storage box easier and more convenient.

The invention discloses a precise tiny electric spark processing method for an outer conical surface and an inner conical surface of a needle valve body of an oil nozzle coupling member of a diesel engine, belonging to the technical field of special processing. The precise processing method comprises the following steps of: processing the outer conical surface of the needle valve by adopting a wire electrode moving and processing method, wherein needle valves with different conical angles can be processed through adjusting the moving angle of the electrode or the moving speed of a rotating main shaft mechanism and a wire electrode moving mechanism; and using an another electrode to process the inner conical surface of the needle valve body by adopting the tiny electric spark processing method, wherein the shape of the another electrode is consistent with that of the outer conical surface of the needle valve. The precise tiny electric spark processing method disclosed by the invention has the characteristics of simple processing device, high processing accuracy and high sealing performance of a processed conical surface; and a better processing method is provided to process the needle valve of the oil nozzle coupling member and the conical surfaces of the needle valve body.

The invention discloses a cabinet air conditioner and a control method thereof, wherein the cabinet air conditioner comprises a housing, a positive air outlet structure and a top air outlet structure; at least one air flue is formed in the housing; the positive air outlet structure is equipped with a positive air outlet which communicates with the air flue; the positive air outlet structure is connected with a first rotary structure; the top air outlet structure is arranged at the upper end of the housing, and is provided with a top air outlet which communicates with the air flue; the top air outlet structure is connected with a second rotary structure; the positive air outlet structure comprises a positive air outlet frame; the positive air outlet frame comprises an air baffle plate; a positive air outlet is formed in the air baffle plate; an avoidance hole which is matched with the positive air outlet is formed in the housing; the first rotary structure comprises a first drive motor, a first drive gear and a gear ring; the gear ring is fixedly connected with the positive air outlet frame; and the first drive gear is engaged with the gear ring for driving the positive air outlet frame to rotate in the housing, so that the positive air outlet is opposite to the avoidance hole or the avoidance hole is sealed by the air baffle plate. The cabinet air conditioner disclosed by the invention is good in air regulating effect, and is simple and stable in structure.

A hand-operated pilot valve comprises a handle, a valve body, an ejector rod, a first spring, a first spring seat, a valve seat, a valve rod, a second spring seat, a second spring and a plug, wherein one end of the handle is in rotational connection with a pin shaft in the valve body; the side surface at the bottom of the handle is propped against the ejector rod; the first spring is in sleeve joint with the ejector rod; one end of the first spring is propped against a lug boss on the ejector rod; the other end of the first spring is propped against the first spring seat; the ejector rod is in slide fit with the valve seat; an oil inlet, an oil outlet line and an oil return line are arranged on the valve seat; a blind hole and an oil return hole communicated with the blind hole are formed in the ejector rod; the valve rod is in slide fit with the valve seat; one end of the second spring is propped against the second spring seat; the other end of the second spring is propped against the plug; the second spring seat is in slide fit with the plug; one end of the plug is propped against the valve seat; the other end of the plug is in threaded connection with the valve body; and an oil chamber is communicated with the oil outlet line through a communication oil line. The hand-operated pilot valve is simple in structure, good in sealing performance and convenient to operate.

The invention provides a lifting push-pull sealing rubber strip. The sealing ring comprises a body. The body comprises an installation part, a sealing part and a lip edge; the installation part, the sealing part and the lip edge are of an integrated structure,; V-shaped installation grooves are formed in the upper side and the lower side of the installation part; the sealing part is a plane; the body is provided with a cavity; and the lip edge extending outwards is arranged above the right side of the body. The sealing structure has the beneficial effects that the sealing effect of doors and windows is improved, the tightness is reduced, smooth opening and closing of window sashes are guaranteed, the structure is simple, and installation is convenient.

The invention provides a pressure limiting and air leaking auxiliary brake valve device with a support guide sleeve. The pressure limiting and air leaking auxiliary brake valve device with the support guide sleeve comprises a valve body, a butterfly sheet, a support device, a pressure regulating device and a pressure leaking port device, wherein a fixed through hole is formed on the valve body; a driving shaft passes through the fixed through hole of the valve body, and the butterfly sheet is fixed in an inner cavity of the valve body, and a fixed notch is formed on the edge of the butterfly sheet; a support hole is also formed on the valve body and is positioned on the valve body of the opposite part of the fixed through hole, and the support hole and the fixed hole are concentric; a support groove is formed on the butterfly sheet and is a round ladder-shaped groove; the support device is a cylindrical guide sleeve which is fixed in the support hole of the valve body; and the guide sleeve protrudes and extends into the inner cavity of the valve body, and is correspondingly inserted in the support groove of the butterfly sheet. The pressure limiting and air leaking auxiliary brake valve device with the support guide sleeve provided by the invention is compact in structure, and effectively controls the motion stroke of a piston tappet, improves the air exhaust back pressure value of an engine at middle and low speeds, guarantees the resistance of the piston tappet in reciprocating motion to be small, prevents an inner spring from being invalid because of high temperature, and enables the service life of the auxiliary brake valve device to be long.

The invention discloses automatic processing equipment for sauce marinated food. The equipment comprises a marinating soup tank, an upper cover, a marinating and boiling tank, a marinating and boilingline, an anti-floating device and a gantry lifting device; the upper cover is positioned above the marinating and boiling tank and is matched with the marinating and boiling tank to form a closed space; the marinating and boiling line is mounted in the marinating and boiling tank, and a material device is a conveying part in the marinating and boiling line through a driving shaft; the anti-floating device is mounted above the marinating and boiling line, and a stainless steel mesh belt in the anti-floating device is positioned above the material device, so that materials can be always immersed in soup marinade in the marinating and boiling process; and the gantry lifting device is mounted on the outer side of the marinating and boiling tank, and the upper cover, the anti-floating device and the marinating and boiling line can be lifted according to different processes. The equipment is high in automation degree and energy-saving, and can be linked with systems such as a raw material conveying line, a product conveying line and a seasoning conveying net to form an automatic production line of the sauce marinated food.

The present invention proposes an air-conditioning cabinet and a control method for the air-conditioning cabinet, wherein the air-conditioning cabinet includes: a housing, at least one air duct is formed in the housing; a positive air outlet structure, having a positive air outlet connected to an air duct , the positive air outlet structure is connected with a first rotating structure; Rotating structure; wherein the positive air outlet structure includes a positive air outlet frame, the positive air outlet frame includes a windshield, the windshield forms a positive air outlet, and the housing forms a relief port that matches the positive air outlet. The first rotating structure It includes the first drive motor, the first driving gear, and the ring gear. The ring gear is fixedly connected to the positive air outlet frame. The first driving gear meshes with the ring gear to drive the positive air outlet frame to rotate in the housing so that the positive air outlet faces the rear or make the windshield block the abdication opening. The air conditioning cabinet machine of the present invention has good air conditioning effect and simple and stable structure.

The invention relates to a pressure-limiting air relief auxiliary brake valve device with an end face seal ring. The pressure-limiting air relief auxiliary brake valve device comprises a valve body, a butterfly piece, a supporting device, a pressure regulating device and a pressure relief port device, wherein the valve body is provided with a fixing through hole, a driving shaft penetrates the fixing through hole of the valve body to fix the butterfly piece in the valve body, a fixing gap and a supporting groove are respectively formed in the butterfly piece, the pressure regulating device comprises a piston tappet rod, the piston tappet rod comprises a column body and the end face seal ring, the column body is inserted into the supporting device, the end face seal ring is located between the supporting device and the supporting groove and driven to move by different air pressures transferred by the pressure relief port device. The pressure-limiting air relief auxiliary brake valve device further comprises a seal spring for adjusting the position of the end face seal ring portion. The pressure-limiting air relief auxiliary brake valve device is compact in structure, effectively controls a movement stroke of the piston tappet rod, improves an exhaust back pressure value of a large engine at medium-low speed, ensures small resistance when the piston tappet rod performs reciprocating motion and prevents the inside spring from being invalid due to high temperature, and the service life of the auxiliary brake valve device is prolonged.

The invention discloses an internal flush water-proof expansion-end-proof drill pipe and relates to the field of drilling tools. The internal flush water-proof expansion-end-proof drill pipe solves the problems in the existing drilling that a connection position of drill pipes leaks and expansion ends of the drill pipes are prone to happen and the like. The internal flush water-proof expansion-end-proof drill pipe comprises a drill pipe body, female heads at two ends of the drill pipe body and a drill pipe body middle shaft channel. A water-proof protrusion is arranged at the outer end of each female head of each end of the drill pipe body, outer walls of the water-proof protrusions are parallel to inner walls of the water-proof protrusions, and included angles between the end walls of the water-proof protrusions and the drill pipe body middle shaft channel are 60 degrees. The internal flush water-proof expansion-end-proof drill pipe is simple in structure, convenient to operate, easy to install and good in sealing effect and does not waste water resource.

The invention relates to a pressure-limiting exhaust auxiliary brake valve set with an arced piston bush. The brake valve set comprises a valve, a disc, a support device, a pressure regulator and a pressure relief opening device. The valve is provided with a fixed through hole. A drive shaft penetrates through the fixed through hole of the valve to fix the disc in an inner cavity of the valve. The pressure regulator comprises a shell of the pressure regulator, a piston tappet, an inner spring, a screw plug and the piston bush. The round-cup-shaped piston bush is disposed in the shell of the pressure regulator, one side of the outside of the cupped bottom of the piston bush is in contact connection with the piston tappet, one side of the inside of the cupped bottom of the piston bush is in contact connection with the inner spring, and the outer wall of the cup is arced. The pressure-limiting exhaust auxiliary brake valve set with the arced piston bush is compact in structure, and moving stroke of the piston tappet is controlled effectively; a value of exhaust back pressure in an engine at low speed is increased; and small resistance in reciprocating motion of the piston tappet is guaranteed, the inner spring can be prevented from failure due to high temperature, and accordingly the service life of the auxiliary brake valve set is longer.

The invention discloses a pressure limiting and air leaking auxiliary brake valve device of a zigzag channel. The pressure limiting and air leaking auxiliary brake valve device of the zigzag channel comprises a valve body, a butterfly sheet, a support device, a pressure regulating device and a pressure leaking port device, wherein the a fixed notch and a support groove are formed on the edge of the butterfly sheet; the support groove of the butterfly sheet is a round ladder-shaped groove, and a first ladder, a second ladder and a third ladder are respectively formed on the outer edge of the butterfly sheet, and the inner diameters are decreased gradually; the pressure leaking port device comprises a first pressure leaking port and a second pressure leaking port; the first pressure leaking port is positioned on the groove wall of the third ladder at one side of an air inlet cavity of the butterfly sheet; the second pressure leaking port is positioned on the groove wall of a first ladder at one side of an air exhaust cavity of the butterfly sheet; and a channel between the first pressure leaking port and the second pressure leaking port is in a zigzag shape. The pressure limiting and air leaking auxiliary brake valve device of the zigzag channel provided by the invention is compact in structure, and effectively controls the motion stroke of a piston tappet, improves the air exhaust back pressure value of an engine at middle and low speeds, guarantees the resistance of the piston tappet in reciprocating motion to be small, prevents an inner spring from being invalid because of high temperature, and enables the service life of the auxiliary brake valve device to be long.

The invention provides a pressure limiting and air leaking auxiliary brake valve device with a support guide sleeve. The pressure limiting and air leaking auxiliary brake valve device with the support guide sleeve comprises a valve body, a butterfly sheet, a support device, a pressure regulating device and a pressure leaking port device, wherein a fixed through hole is formed on the valve body; a driving shaft passes through the fixed through hole of the valve body, and the butterfly sheet is fixed in an inner cavity of the valve body, and a fixed notch is formed on the edge of the butterfly sheet; a support hole is also formed on the valve body and is positioned on the valve body of the opposite part of the fixed through hole, and the support hole and the fixed hole are concentric; a support groove is formed on the butterfly sheet and is a round ladder-shaped groove; the support device is a cylindrical guide sleeve which is fixed in the support hole of the valve body; and the guide sleeve protrudes and extends into the inner cavity of the valve body, and is correspondingly inserted in the support groove of the butterfly sheet. The pressure limiting and air leaking auxiliary brake valve device with the support guide sleeve provided by the invention is compact in structure, and effectively controls the motion stroke of a piston tappet, improves the air exhaust back pressure value of an engine at middle and low speeds, guarantees the resistance of the piston tappet in reciprocating motion to be small, prevents an inner spring from being invalid because of high temperature, and enables the service life of the auxiliary brake valve device to be long.

The invention discloses a pressure limiting and air leaking auxiliary brake valve device with a circular-arc-shaped pressure leaking port. The pressure limiting and air leaking auxiliary brake valve device with the circular-arc-shaped pressure leaking port comprises a valve body, a butterfly sheet, a support device and a pressure regulating device; a support groove of the butterfly sheet is a circular ladder-shaped groove, a first ladder, a second ladder and a third ladder are respectively arranged from the outer edge of the butterfly sheet, and the inner diameters are sequentially decreased; the pressure leaking port device comprises a first pressure leaking port and a second pressure leaking port, wherein the first pressure leaking port is positioned on the groove wall of a third ladder of the support groove at one side of an air intake cavity of the butterfly sheet; the second pressure leaking port is positioned on the groove wall of a first ladder of the support groove at one side of an air exhaust cavity of the butterfly sheet; a channel positioned between the first pressure leaking port and the second pressure leaking port is in a zigzag shape; the first pressure leaking port and the second pressure leaking port are strip-shaped; and circular-arc-shaped through holes are formed at two ends of the first pressure leaking port and the second pressure leaking port. The pressure limiting and air leaking auxiliary brake valve device provided by the invention is compact in structure, and effectively controls the motion stroke of a piston tappet rod, improves the air exhaust back pressure value of an engine at the middle and low speeds, guarantees the small resistance of the tappet rod in reciprocating operation, prevents an inner spring from being invalid because of high temperature, thus the service life of an auxiliary brake valve device is long.

The invention relates to a pressure-limiting air escape auxiliary brake valve device with a piston tappet with an end face. The pressure-limiting air escape auxiliary brake valve device comprises a valve body, a disc, a support device, a pressure regulator and a pressure relief opening device, a fixing through hole is arranged on the valve body, a driving shaft penetrates through the fixing hole of the valve body to fix the disc in the valve body, a fixing notch and a support groove are arranged on the disc, the pressure regulator comprises the piston tappet which is a cylinder, one end of the piston tappet passes through the support device to extend into the support groove in a projecting manner, the piston tappet is arranged between the support device and the support groove and receives different air pressure transmitted by the pressure relief opening device for movement, and one end of the piston tappet inserted into the support groove serves as an end face. The pressure-limiting air escape auxiliary brake valve device is compact in structure, and movement stroke of the piston tappet is effectively controlled; exhaust backpressure values of an engine at medium and low speeds are decreased; and small resistance during reciprocation of the piston tappet is guaranteed, an inner spring is prevented from failure caused by high temperature, and accordingly the service life of the auxiliary brake valve device is longer.

The invention relates to a pressure-limiting venting auxiliary brake valve device with an air vent screw plug. The pressure-limiting venting auxiliary brake valve device comprises a valve body, a disk, a support device, a pressure adjusting device, and a pressure relief opening device. A fixed through hole is reserved on the valve body. A drive shaft penetrates the fixed through hole to fix the disk in the inner cavity of the valve body. The pressure adjusting device comprises a shell, a piston tappet, an inner spring and a piston sleeve. The screw plug is in a cup shape. The inner spring is contacted with inner side of the cup bottom. One end of the screw plug near the cup bottom is provided with outer threads by tapping. The screw plug is connected with shell of the pressure adjusting device in a threaded manner. A notch is reserved at the cup opening of the screw plug. At least one air vent is reserved at the cup bottom of the screw plug. The pressure limiting venting auxiliary brake valve device is compact in structure, can effectively control motion travel of the piston tappet and improve exhaust back pressure of an engine at low speed, guarantees low resistance of reciprocating motion of the piston tappet, prevents failure of an inner spring due to high temperature, and enables service life of the auxiliary brake valve device to be prolonged.

The invention relates to a pressure-limiting and air-releasing auxiliary brake valve device with air holes in a piston tappet sleeve, comprising a valve body; a butterfly plate; a supporting device; a pressure regulating device; a pressure relief port device; the pressure regulating device includes a The piston tappet sleeve, the piston tappet sleeve includes: the piston tappet part and the piston sleeve part are integrally formed; the piston tappet part is a cylinder, and one end protrudes into the support groove through the support device to receive the pressure relief port device Different air pressures are transmitted to move, and the end inserted into the supporting groove is an end face; in addition, a pressure-stabilizing vent hole is opened on the valve body on the side of the air intake chamber, which communicates with the air intake chamber and the pressure regulating device. The invention has a compact structure, effectively controls the movement stroke of the piston tappet sleeve; improves the exhaust back pressure value at low and medium speeds of the engine; ensures that the resistance of the piston tappet sleeve during reciprocating motion is small, prevents the inner spring from failing due to high temperature, and makes the auxiliary The brake valve unit has a longer service life.

A multi-functional electrically and thermally conductive adhesive tape is described. The adhesive tape at least has the following structures: a complex structure or a single structure having a plurality of protuberant holes or concavities extended from one side of the complex structure or the single structure. Adhesive material is coated on both sides or a single side of the complex structure or the single structure, wherein the adhesive layer is an electrically and thermally conductive layer or an electrically non-conductive layer. The electrically non-conductive adhesive layer, depending on the practical application, can be chosen from any kind of adhesive material. The electrically conductive adhesive layer can be chosen from any kind of adhesive material doped with electrically and thermally conductive dopants.

The invention discloses an aerodynamic breathable shoe. The aerodynamic breathable shoe comprises a sole and an upper, an integrally-formed air bag inserting groove is formed in the heel of the sole,an air bag cover is arranged on the air bag inserting groove, the air bag cover is of a plastic integrally-formed structure, the air bag cover comprises an upper end air bag cap and an air bag inserting edge extending downwards from the side edge of the periphery of the air bag cover, the air bag inserting edge is matched with the air bag inserting groove in a sealed mode and forms a breathing airbag with the air bag cap, the lower edge of the air bag inserting edge abuts against and is matched with the bottom of the air bag inserting groove, the upper edge of the air bag inserting groove abuts against and is matched with the air bag cap, a one-way air inlet valve and a one-way air outlet valve are arranged on the air bag inserting edge correspondingly, the one-way air inlet valve makes the breathing air bag communicate with the space inside the shoe, the one-way air outlet valve makes the breathing air bag communicate with the space outside the shoe, recesses are formed in the positions, corresponding to the one-way air inlet valve and the one-way air outlet valve, of the air bag inserting groove, and the uppermost ends of the recesses are lower than the lowermost ends of the one-way air inlet valve and the one-way air outlet valve.