CN112754107A - Shoe tightening and loosening device - Google Patents

Abstract

The invention discloses a shoe tightening device which comprises an air inlet assembly, a one-way air inflation air bag assembly, an air inflation and deflation control valve and an air outlet assembly which are sequentially connected, wherein an air vent communicated with the outside is further formed in the side wall of an air cylinder, and the front end of a piston rod extends into the air cylinder and can stretch and retract relative to the air cylinder so as to establish an air inflation mode, an air deflation mode and a locking mode of the shoe tightening device. The invention has simple structure, can quickly and automatically adjust the inflation quantity of the vamp air bag through the inflation and deflation control valve, realizes full-automatic tightening or loosening, meets the requirement of the foot of a user on the tightness of the vamp at any time, and improves the comfort of the user wearing shoes.

Description

Shoe tightening and loosening device

Technical Field

The invention relates to the technical field of shoe accessories, in particular to a shoe tightening and loosening device.

Background

Since the advent of shoes, many methods have been invented to secure the foot between the upper and the sole, such as the use of shoelace tying, velcro patches, zipper tightening, and natural angles between the upper and the instep and leg.

However, since the left and right feet of a person are only substantially symmetrical, their foot lengths, foot circumferences, etc. are not exactly equal. The size of the foot of the user can change along with the change of external conditions. For example, seasonal influences, due to the heat of the weather in summer, the heat dissipation capacity of feet is large, the size of the feet is large due to the expansion of blood vessels and muscles, and the situation is opposite in winter; or the influence of body weight bearing, the change of the foot is very big when bearing weight, the bearing capacity of the foot can be increased when bearing weight, the arch of the foot disappears, moreover, because the larger gaps among the bone blocks are filled by ligaments and muscles, the metatarsophalangeal joint can be compressed or stretched transversely to some extent, the fat layer of the sole of the foot can be extruded under the pressure of the foot bones, and the length and the circumference of the foot can be increased. When a person loads on one foot, the foot length can be increased by about 3 mm. In daily life, the size of the foot is also changed when the user walks or exercises for a long time. The shoe tree and the international popular size conversion method are required to be used when the traditional shoes in mass production are produced, and because the foot shapes of different users are different from the shoe tree, the shoe upper always has some places which can not be well attached to the foot surface of the user.

Therefore, the conventional shoes can only meet the requirement of tightness of the vamp of a user at a certain moment regardless of any fixing mode, and the user can only bear the discomfort because the adjustment is very troublesome when the feet of the user expand or contract. In order to improve the use feeling of a user and meet the requirement of the user on tightness of the vamp at different moments, an inflatable air bag is required to be installed on the vamp to realize the tightening and loosening functions of the vamp, but the difficulty is how to adjust the inflation quantity of the air bag of the vamp.

Disclosure of Invention

The invention aims to solve the technical problem that the defects of the prior art are overcome, and provides a shoe tightening device, which solves the problem that the air bag of a vamp is difficult to adjust the inflation quantity, and realizes the purpose of quickly and automatically adjusting the inflation quantity of the air bag of the vamp so as to control the vamp to be automatically tightened or loosened.

The technical scheme of the invention is realized as follows:

the invention provides a shoe tightening device, comprising:

the inflation and deflation control valve is provided with a first air inlet end and a first air outlet end;

the unidirectional inflatable air bag component is provided with a second air inlet end and a second air outlet end;

the air inlet assembly is connected with the second air outlet end;

the air outlet assembly is connected with the first air outlet end;

the air inlet assembly, the one-way inflatable air bag assembly, the inflation and deflation control valve and the air outlet assembly are sequentially connected; the inflation and deflation control valve comprises a piston rod and an air cylinder; the lateral wall of inflator still is provided with the gas release hole with external intercommunication, the front end of piston rod stretches into the inflator, and can be relative the inflator is flexible to establish shoes resilient means's inflation mode, gassing mode and locking mode.

Furthermore, the unidirectional inflatable airbag assembly comprises an airbag upper body and an airbag lower body, wherein the airbag upper body and the airbag lower body are aligned with each other and are peripherally connected to form a bag cavity; the gasbag lower part of the body bottom still is provided with the breather pipe, a through-hole has been seted up to the gasbag lower part of the body, the bag chamber with the breather pipe passes through the through-hole intercommunication.

Furthermore, a first one-way valve and a second one-way valve are further arranged in the vent pipe, the first one-way valve is arranged between the second air inlet end and the through hole, and the second one-way valve is arranged between the second air outlet end and the through hole.

Further, be provided with the bradyseism piece that is used for the buffering in the bag chamber, the upper portion of bradyseism piece support in the gasbag upper part of the body, the lower part of bradyseism piece support in the gasbag lower part of the body, the lower part of bradyseism piece is lieing in the position of through-hole top is formed with the air chamber, the air chamber with the breather pipe passes through the through-hole intercommunication.

Furthermore, the inflation and deflation control valve also comprises a push-pull switch; the rear end of the piston rod is connected with the push-pull switch, and the piston rod controls the extending distance in the air cylinder through the push-pull switch; the first air inlet end and the first air outlet end are arranged on the air cylinder; the front end of the piston rod is further sleeved with a sealing rubber ring for sealing, and the push-pull switch pushes the piston rod to move so as to control the communication state of the air vent, the first air inlet end and the first air outlet end.

Furthermore, one surface of the inflator, which is close to the push-pull switch, is provided with a spring buckle, and the push-pull switch is provided with a plurality of grooves for fixing the spring buckle; when the push-pull switch pushes the piston rod to move, the piston rod is mutually clamped with the groove through the elastic buckle, and the piston rod is configured into the gear positions of the inflation mode, the deflation mode and the locking mode.

Further, the grooves comprise a first groove, a second groove and a third groove;

in the deflation mode, the elastic buckle is clamped with the first groove; the air vent, the first air inlet end and the first air outlet end in the air inflation and deflation control valve are all in a communicated state;

in the inflation mode, the elastic buckle is clamped with the second groove; the push-pull switch in the inflation and deflation control valve pushes the piston rod to move for a certain distance, so that the air vent is blocked by the sealing rubber ring at the front end of the piston rod, and the first air inlet end and the first air outlet end are in a communicated state;

under the locking mode, the elastic buckle is clamped with the third groove, the piston rod is pushed into the inflator for a distance, and the sealing rubber ring at the front end of the piston rod seals the air vent and the first air inlet end at the same time.

Furthermore, a pressure relief cavity for pressure relief is further arranged at the connection position of the first air inlet end and the air cylinder, a pressure relief assembly is arranged in the pressure relief cavity, and the pressure relief assembly comprises a sealing element, a moving element, an elastic element and a clamping screw which are sequentially arranged; the first end of the pressure relief cavity is connected with the joint of the first air inlet end and the air cylinder, and the second end of the pressure relief cavity is provided with the clamping screw; when the gas pressure of first inlet end is greater than when releasing pressure intracavity internal pressure, the sealing member with the moving part is in the pressure release intracavity moves towards the direction of screens screw, works as the gas pressure of first inlet end is less than when releasing pressure intracavity internal pressure, the sealing member with the screens screw is right it seals to release the pressure chamber.

Further, the air inlet assembly comprises an air inlet pipe and an air inlet joint used for fixing the air inlet pipe, and the air inlet joint is connected with the unidirectional inflating air bag assembly.

Further, the air outlet assembly comprises an air outlet pipe and an air outlet connector used for fixing the air outlet pipe, and the air outlet connector is connected with the first air outlet end of the air charging and discharging control valve.

By adopting the technical scheme, the shoe tightening and loosening device provided by the invention has the beneficial effects that: swiftly the gas filling volume of automatically regulated vamp gasbag, realize full-automatic tightening up or relaxing, satisfy user's foot to the demand of vamp elasticity at any time, improve the comfort that the user wore shoes.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a shoe tensioner in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the inflation and deflation control valve shown in FIG. 1;

FIG. 3 is an exploded view of the inflation and deflation control valve shown in FIG. 1;

FIG. 4 is a cross-sectional view of the one-way inflatable airbag assembly of FIG. 1;

FIG. 5 is a cross-sectional view of a one-way inflatable airbag assembly in another embodiment of the present invention.

In the figure, 10-inflation and deflation control valves, 101-a first air inlet end, 102-a first air outlet end, 11-a push-pull switch, 12-a piston rod, 121-a sealing rubber ring, 13-an air cylinder, 131-an air outlet hole, 14-an elastic buckle, 15-a groove, 151-a first groove, 152-a second groove, 153-a third groove, 20-a one-way inflation air bag component, 201-a second air inlet end, 202-a second air outlet end, 21-an air bag upper body, 22-an air bag lower body, 221-a through hole, 23-a shock absorption piece, 24-an air pipe, 25-a first one-way valve, 26-a second one-way valve, 27-an air chamber, 30-an air inlet component, 31-an air inlet pipe, 32-an air inlet joint, 40-an air outlet component and 41-an air outlet pipe, 42-air outlet connector, 50-pressure relief component, 51-sealing element, 52-movable element, 53-elastic element and 54-retaining screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention; FIG. 2 is a cross-sectional view of the inflation and deflation control valve shown in FIG. 1; FIG. 3 is an exploded view of the inflation and deflation control valve shown in FIG. 1; FIG. 4 is a cross-sectional view of the one-way inflatable airbag assembly of FIG. 1. Referring to fig. 1 to 4, in an embodiment of the present invention, a shoe tensioner includes an air inlet assembly 30, a one-way inflatable air bag assembly 20, an air inflation and deflation control valve 10, and an air outlet assembly 40, which are connected in sequence. The air inlet module 30, the one-way inflatable air bag module 20, the inflation and deflation control valve 10 and the air outlet module 40 are connected by an air pipe. The inflation and deflation control valve 10 is provided with a first air inlet end 101 and a first air outlet end 102; the one-way inflatable air bag component 20 is provided with a second air inlet end 201 and a second air outlet end 202; the air inlet assembly 30 is connected with the second air outlet end 202; the air outlet assembly 40 is connected with the first air outlet end 102; the first air inlet end 101 and the second air outlet end 202 are connected through an air pipe; the inflation and deflation control valve 10 comprises a piston rod 12 and an air cylinder 13; the side wall of the cylinder 13 is further provided with an air release hole 131 communicating with the outside, and the front end of the piston rod 12 extends into the cylinder 13 and can be extended and retracted relative to the cylinder 13 to establish an inflation mode, an deflation mode and a locking mode of the shoe tensioner.

Specifically, the one-way inflatable airbag module 20 includes an upper airbag body 21 and a lower airbag body 22, and the upper airbag body 21 and the lower airbag body 22 are aligned with each other and connected peripherally to enclose a bag cavity. Preferably, the upper balloon body 21 and the lower balloon body 22 are integrally connected by high frequency fusion. The bottom of the airbag lower body 22 is further provided with a vent pipe 24, and it should be noted that the second air inlet end 201 and the second air outlet end 202 of the one-way inflatable airbag module 20 are specifically arranged at two ends of the vent pipe 24. The airbag lower body 22 is provided with a through hole 221, and the airbag cavity is communicated with the vent pipe 24 through the through hole 221, so that the gas entering from the second gas inlet end 201 of the one-way inflatable airbag assembly 20 can enter the airbag cavity, or the gas in the airbag cavity can flow out from the second gas outlet end 202. In the present embodiment, the material of the upper and lower balloon bodies 21 and 22 is preferably TPU. The TPU is thermoplastic polyurethane elastomer rubber, has wide hardness range, wear resistance, oil resistance, transparency and good elasticity, has the characteristics of high tension, toughness and aging resistance, and is a mature environment-friendly material.

Specifically, a first check valve 25 and a second check valve 26 are further disposed in the vent pipe 24, the first check valve 25 is disposed at any position between the second air inlet end 201 and the through hole 221, and the second check valve 26 is disposed at any position between the second air outlet end 202 and the through hole 221. In the present embodiment, the gas flows in the direction from the first check valve 25 to the second check valve 26, and the first check valve 25 and the second check valve 26 enable the gas to flow only from the second gas inlet end 201 to the second gas outlet end 202, but not to flow in the opposite direction. At this moment, when external world applyed pressure to the bag chamber, the air in the bag chamber was compressed, and the bag intracavity is equipped with high strength malleation atmospheric pressure, and the bag intracavity portion forms the air pressure difference with the external world this moment, and the gaseous breather pipe 24 that enters into through-hole 221 in the bag chamber, and at this moment, because under the effect of malleation atmospheric pressure, second check valve 26 is sealed, and first check valve 25 is opened, and gaseous end 202 outflow is given vent to anger through the second. When the bag cavity is not pressurized, the shock absorber 23 recovers to its original shape after the external force is removed, so as to form an upward thrust on the upper bag body 21, and the air chamber 27 has a negative air pressure and forms a pressure difference with the outside, at this time, the first check valve 25 is opened due to the negative air pressure, and the second check valve 26 is sealed due to the negative air pressure. At this time, the outside air flows to the first air intake end 201 of the one-way inflatable air bag module 20, and the outside air is sent into the air chamber 27 of the one-way inflatable air bag module 20.

In another embodiment, referring to fig. 5, the first check valve 25 and the second check valve 26 are arranged in opposite directions, that is, the first check valve 25 and the second check valve 26 are arranged in opposite directions in the previous embodiment. When the external world exerts pressure on the bag cavity at this moment, the air in the bag cavity is compressed, the bag cavity is provided with high-strength positive pressure air pressure, an air pressure difference is formed between the interior of the bag cavity and the external world at this moment, the air in the bag cavity enters the vent pipe 24 through the through hole 221, the first check valve 25 is sealed due to positive air pressure at this moment, the second check valve 26 is opened due to positive air pressure, the air of the air outlet assembly 40 flows to the first air inlet end 201 of the one-way inflatable air bag assembly 20 through the air inflation and deflation control valve 10, and then flows into the air chamber 27 from the second check valve 26 to be stored. When the air chamber is not pressurized, the shock absorber 23 recovers to its original shape after the external force is removed, so as to form an upward thrust on the air bag upper body 21, and the air chamber 27 has a negative air pressure and forms a pressure difference with the outside. At this time, under the negative pressure, the first check valve 25 is opened, the second check valve 26 is sealed, and the outside air flows to the first air inlet port 201 of the one-way inflatable air bag module 20, and the outside air is sent into the air chamber 27 of the one-way inflatable air bag module 20.

Specifically, a shock absorber 23 for buffering is provided in the capsule cavity, and preferably, the shock absorber 23 is made of rubber. The rubber is a high-elasticity polymer material with reversible deformation, is rich in elasticity at room temperature, can generate large deformation under the action of small external force, and can recover the original shape after the external force is removed. The upper part of the shock absorption piece 23 is abutted against the air bag upper body 21, the lower part of the shock absorption piece 23 is abutted against the air bag lower body 22, an air chamber 27 is formed at the part of the lower part of the shock absorption piece 23 above the through hole 221, and the air chamber 27 is communicated with the vent pipe 24 through the through hole 221. The gas chamber 27 is mainly used for storing gas.

It should be noted that, in the locking mode of the shoe tightening device, the air is not flowing, the unidirectional inflatable air bag assembly 20 is filled with air, when a human body moves and steps on the unidirectional inflatable air bag assembly 20, the built-in pressure and the shock absorption part 23 absorb energy to form an upward force to form a shock absorption effect, and the comfort can be improved.

Specifically, in order to adjust the amount of extension of the front end of the piston rod 12 into the cylinder 13, the inflation and deflation control valve 10 further comprises a push-pull switch 11; the rear end of the piston rod 12 is connected with the push-pull switch 11, and the piston rod 12 controls the extending distance in the air cylinder 13 through the push-pull switch 11; the first air inlet end 101 and the first air outlet end 102 are arranged on the air cylinder 13; in this embodiment, the first gas inlet end 101 is disposed on the side of the gas cylinder 13, and the first gas outlet end 102 is disposed on one end of the gas cylinder 13 close to the gas outlet assembly 40. That is, the communication path between the first inlet 101 and the first outlet 102 is L-shaped.

The front end of the piston rod 12 is further sleeved with a sealing rubber ring 121 for sealing, and the push-pull switch 11 pushes the piston rod 12 to move to control the communication state of the air vent 131, the first air inlet end 101 and the first air outlet end 102. In this embodiment, the front end of the piston rod 12 is sleeved with 2 sealing rubber rings 121. The interval between the 2 sealing rubber rings 121 is in a locking mode, so that the air vent 131 and the first air inlet end 101 can be blocked at the same time.

In the inflation/deflation control valve 10, in the deflation mode, the sealing rubber ring 121 at the front end of the piston rod 12 does not block the deflation port 131, and at this time, the deflation port 131 communicates with the outside, and the gas in the gas cylinder 13 can flow out through the deflation port 131. In the inflation mode, the air vent hole 131 is blocked by the sealing rubber ring 121 at the front end of the piston rod 12, and air flows from the first air inlet end 101 to the first air outlet end 102.

Specifically, in order to know the state that the push-pull switch 11 pushes the piston rod 12 to extend into the air cylinder 13 conveniently, a snap 14 is arranged on one side of the air cylinder 13 close to the push-pull switch 11, and the push-pull switch 11 is provided with a plurality of grooves 15 for fixing the snap 14; when the push-pull switch 11 pushes the piston rod 12 to move, the elastic buckle 14 and the groove 15 are mutually engaged to configure the gear positions of an inflation mode, a deflation mode and a locking mode. The elastic buckle 14 is matched with the groove 15, so that the hand feeling of the adjusting mode can be increased, and misoperation can be avoided.

Specifically, the grooves 15 include a first groove 151, a second groove 152, and a third groove 153; the positions of the first groove 151, the second groove 152 and the third groove 153 just enable the piston rod 12 to control the communication state of the air release hole 131, the first air inlet end 101 and the first air outlet end 102, so as to control the inflation mode, the deflation mode and the locking mode of the inflation and deflation control valve 10.

The communication state of the air release hole 131, the first air inlet end 101 and the first air outlet end 102 when the latch 14 and the groove 15 are engaged with each other in the inflation mode, the deflation mode and the locking mode will be briefly described below:

in the deflation mode, the snap 14 is engaged with the first groove 151; at this time, the air vent hole 131 is not blocked by the sealing rubber ring 121 at the front end of the piston rod 12, and the air vent hole 131, the first air inlet end 101 and the first air outlet end 102 in the air inflation and deflation control valve 10 are all in a communicated state;

in the inflation mode, the latch 14 is engaged with the second groove 152; when the inflation mode needs to be switched, the push-pull switch 11 in the inflation and deflation control valve 10 pushes the piston rod 12 to move for a certain distance, when the snap 14 is fastened with the second groove 152, the air vent 131 is blocked by the sealing rubber ring 121 at the front end of the piston rod 12, and at this time, the first air inlet 101 and the first air outlet 102 are in a communicated state;

in the locking mode, the elastic buckle 14 is engaged with the third groove 153, when the locking mode needs to be switched, the piston rod 12 is pushed into the air cylinder 13 for a certain distance, and when the elastic buckle 14 is engaged with the third groove 153, the sealing rubber ring 121 at the front end of the piston rod 12 seals the air vent 131 and the first air inlet 101 at the same time, and at this time, the air in the shoe tensioner cannot flow.

Specifically, in order to protect each part of the shoe tightening and loosening device and avoid over-high air pressure, a pressure relief cavity for pressure relief is further arranged at the joint of the first air inlet end 101 and the air cylinder 13, a pressure relief assembly 50 is arranged in the pressure relief cavity, and the pressure relief assembly 50 comprises a sealing element 51, a moving element 52, an elastic element 53 and a clamping screw 54 which are sequentially arranged; the first end of the pressure relief cavity is connected with the joint of the first air inlet end 101 and the air cylinder 13, and the second end of the pressure relief cavity is provided with a clamping screw 54; in this embodiment, the sealing member 51 is a sealing ring, the movable member 52 is a ball-shaped bead, and the elastic member 53 is a spring. In the initial state, due to the elastic member 53, the movable member 52 is pressed against the first end of the pressure relief chamber through the sealing member 51, so as to seal the pressure relief chamber. When the gas pressure at the first gas inlet end 101 is greater than the elastic force of the elastic element 53 inside the pressure release chamber, the sealing element 51 and the movable element 52 move in the direction of the locking screw 54 inside the pressure release chamber, and when the gas pressure at the first gas inlet end 101 is less than the pressure inside the pressure release chamber, the sealing element 51 and the locking screw 54 seal the pressure release chamber.

In practical applications, the first air inlet end 101 is communicated with the pressure relief cavity, when air enters the first air inlet end 101, the movable member 52 is pushed to move when the air pressure is too high, and when the air pressure is reduced, the movable member 52 returns to the initial position to seal the pressure relief cavity again. The pressure relief cavity and the pressure relief assembly 50 arranged in the pressure relief cavity can avoid overlarge gas pressure value from the first gas outlet end 102, and automatic pressure relief is carried out when the pressure is overlarge, so that the protection effect is achieved.

Specifically, the air intake assembly 30 includes an air intake pipe 31 and an air intake joint 32 for fixing the air intake pipe 31, and the air intake joint 32 is connected to the one-way inflatable airbag assembly 20.

Specifically, the air outlet assembly 40 includes an air outlet pipe 41 and an air outlet joint 42 for fixing the air outlet pipe 41, and the air outlet joint 42 is connected to the first air outlet end 102 of the inflation and deflation control valve 10.

In this embodiment, the air intake assembly 30 is installed on the heel end surface of the shoe body, so as to facilitate air suction without affecting the beauty. The unidirectional inflatable air bag assembly 20 is arranged in the sole treaded by the heel of a foot, so that pressure can be applied to the unidirectional inflatable air bag assembly 20 through the heel of the foot conveniently, the inflation and deflation control valve 10 is arranged in the middle of the sole, and the push-pull switch 11 extends to the side face of the sole, so that the operation of a user is facilitated. The outlet of air outlet assembly 40 is connected to the inflatable bladder of the upper to control the amount of inflation of the inflatable bladder of the upper. In other embodiments, the air inlet assembly 30 may be disposed at the side of the shoe body, and the one-way inflatable bladder assembly 20 may be disposed at the middle of the sole or at the forefoot.

In the invention, when the air bag of the vamp needs to be deflated, the push-pull switch 11 is adjusted to the leftmost position of the inflation and deflation control valve 10, namely, the deflation mode. In the deflation mode, the deflation hole 131, the first air inlet end 101 and the first air outlet end 102 are not blocked by the sealing rubber ring 121 of the piston rod 12, the deflation hole 131 is in a communication state with the outside, and the air in the air bag of the upper flows back to the inflation and deflation control valve 10 through the air outlet pipe 41 and is discharged through the deflation hole 131. When the airbag of the upper needs to be inflated, the push-pull switch 11 is adjusted to the position where the air vent 131 is blocked by the sealing rubber ring 121 at the front end of the piston rod 12 in the inflation/deflation control valve 10, and in this state, the first air inlet end 101 and the first air outlet end 102 allow air to pass through. The gas sucked from the gas inlet assembly 30 passes through the one-way inflatable air bag assembly 20, enters from the first gas inlet end 101 of the gas charging and discharging control valve 10 and flows out from the first gas outlet end 102, and finally enters the air bag to be inflated through the gas outlet pipe 41 of the gas outlet assembly 40. In order to control and maintain the inflation amount of the vamp air bag, the push-pull switch 11 is adjusted to the rightmost position of the inflation and deflation control valve 10, and the sealing rubber ring 121 of the piston rod 12 simultaneously seals the deflation hole 131 and the first air inlet end 101, so that air cannot flow in from the first air inlet end 101 or the first air outlet end 102.

In this embodiment, the air intake assembly 30 is installed on the heel end surface of the shoe body, so as to facilitate air suction without affecting the beauty. The unidirectional inflatable air bag assembly 20 is arranged in the sole treaded by the heel of a foot, so that pressure can be applied to the unidirectional inflatable air bag assembly 20 through the heel of the foot conveniently, the inflation and deflation control valve 10 is arranged in the middle of the sole, and the push-pull switch 11 extends to the side face of the sole, so that the operation of a user is facilitated. The outlet of air outlet assembly 40 is connected to the inflatable bladder of the upper to control the amount of inflation of the inflatable bladder of the upper. In other embodiments, the air inlet assembly 30 may be disposed at the side of the shoe body, and the one-way inflatable bladder assembly 20 may be disposed at the middle of the sole or at the forefoot.

After the user wears the shoes, the push-pull switch 11 is firstly shifted to the second groove 152, that is, the inflation and deflation control valve 10 is in the inflation state; at this time, the vamp can be inflated and tightened through the one-way inflation airbag assembly 20, and when the user feels that the tightening degree of the vamp is proper, the push-pull switch 11 can be slid to the position of the third groove 153, and the inflation and deflation control valve 10 is in the locking mode; at this time, the one-way inflatable air bag assembly 20 is continuously stepped to prevent the continuous inflation and the air leakage, the vamp is kept at a fixed tightness, and when the shoe is to be taken off, the push-pull switch 11 is pushed to the position of the first groove 151, namely, the deflation state, so that the operation of deflating and taking off the shoe can be carried out.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A shoe tightening device, comprising:

the charging and discharging control valve (10) is provided with a first air inlet end (101) and a first air outlet end (102);

a one-way inflatable airbag assembly (20) having a second inlet end (201) and a second outlet end (202);

the air inlet assembly (30), the air inlet assembly (30) is connected with the second air outlet end (202);

a gas outlet assembly (40), wherein the gas outlet assembly (40) is connected with the first gas outlet end (102);

wherein the air inlet assembly (30), the one-way inflatable air bag assembly (20), the inflation and deflation control valve (10) and the air outlet assembly (40) are connected in sequence; the inflation and deflation control valve (10) comprises a piston rod (12) and an air cylinder (13); the side wall of the air cylinder (13) is further provided with an air release hole (131) communicated with the outside, the front end of the piston rod (12) extends into the air cylinder (13) and can stretch relative to the air cylinder (13) so as to establish an inflation mode, an deflation mode and a locking mode of the shoe tightening device.

2. The shoe tightening apparatus of claim 1, wherein: the unidirectional inflatable airbag assembly (20) comprises an airbag upper body (21) and an airbag lower body (22), wherein the airbag upper body (21) and the airbag lower body (22) are aligned with each other and are peripherally connected to form a bag cavity; the gasbag lower part of the body (22) bottom still is provided with breather pipe (24), a through-hole (221) has been seted up in the gasbag lower part of the body (22), the bag chamber with breather pipe (24) pass through-hole (221) intercommunication.

3. The shoe tightening apparatus of claim 2, wherein: a first one-way valve (25) and a second one-way valve (26) are further arranged in the vent pipe (24), the first one-way valve (25) is arranged between the second air inlet end (201) and the through hole (221), and the second one-way valve (26) is arranged between the second air outlet end (202) and the through hole (221).

4. The shoe tightening apparatus of claim 2, wherein: be provided with bradyseism piece (23) that is used for the buffering in the bag chamber, the upper portion of bradyseism piece (23) support in gasbag upper part of the body (21), the lower part of bradyseism piece (23) support in the gasbag lower part of the body (22), the lower part of bradyseism piece (23) is lieing in the position of through-hole (221) top is formed with air chamber (27), air chamber (27) with breather pipe (24) pass through-hole (221) intercommunication.

5. The shoe tightening apparatus of claim 1, wherein: the inflation and deflation control valve (10) further comprises a push-pull switch (11); the rear end of the piston rod (12) is connected with the push-pull switch (11), and the piston rod (12) controls the extending distance in the air cylinder (13) through the push-pull switch (11); the first gas inlet end (101) and the first gas outlet end (102) are arranged on the gas cylinder (13); the front end of the piston rod (12) is further sleeved with a sealing rubber ring (121) for sealing, and the push-pull switch (11) pushes the piston rod (12) to move so as to control the communication state of the air vent (131), the first air inlet end (101) and the first air outlet end (102).

6. The shoe tightening apparatus of claim 5, wherein: one surface of the air cylinder (13) close to the push-pull switch (11) is provided with a snap fastener (14), and the push-pull switch (11) is provided with a plurality of grooves (15) for fixing the snap fastener (14); when the push-pull switch (11) pushes the piston rod (12) to move, the elastic buckle (14) is mutually clamped with the groove (15) to be configured into the gear positions of the inflation mode, the deflation mode and the locking mode.

7. The shoe tensioner of claim 6, wherein: the grooves (15) comprise a first groove (151), a second groove (152) and a third groove (153);

in the air release mode, the elastic buckle (14) is clamped with the first groove (151); the air release hole (131), the first air inlet end (101) and the first air outlet end (102) in the inflation and deflation control valve (10) are all in a communicated state;

in the inflation mode, the elastic buckle (14) is clamped with the second groove (152); the push-pull switch (11) in the inflation and deflation control valve (10) pushes the piston rod (12) to move for a certain distance, so that the air vent (131) is blocked by the sealing rubber ring (121) at the front end of the piston rod (12), and the first air inlet end (101) and the first air outlet end (102) are in a communicated state;

in the locking mode, the elastic buckle (14) is clamped with the third groove (153), the piston rod (12) is pushed into the air cylinder (13) for a certain distance, and the sealing rubber ring (121) at the front end of the piston rod (12) seals the air vent (131) and the first air inlet end (101) at the same time.

8. The shoe tightening apparatus of claim 5, wherein: a pressure relief cavity for pressure relief is further arranged at the joint of the first air inlet end (101) and the air cylinder (13), a pressure relief assembly (50) is arranged in the pressure relief cavity, and the pressure relief assembly (50) comprises a sealing element (51), a moving element (52), an elastic element (53) and a clamping screw (54) which are sequentially arranged; the first end of the pressure relief cavity is connected with the joint of the first air inlet end (101) and the air cylinder (13), and the second end of the pressure relief cavity is provided with the clamping screw (54); when the gas pressure of first inlet end (101) is greater than when releasing pressure intracavity internal pressure, sealing member (51) with moving part (52) are in release pressure intracavity towards the direction removal of screens screw (54), when the gas pressure of first inlet end (101) is less than when releasing pressure intracavity internal pressure, sealing member (51) with screens screw (54) are right release pressure intracavity is sealed.

9. The shoe tightening apparatus of claim 1, wherein: the air inlet assembly (30) comprises an air inlet pipe (31) and an air inlet joint (32) used for fixing the air inlet pipe (31), and the air inlet joint (32) is connected with the one-way inflatable air bag assembly (20).

10. The shoe tightening apparatus of claim 1, wherein: the air outlet assembly (40) comprises an air outlet pipe (41) and an air outlet joint (42) used for fixing the air outlet pipe (41), and the air outlet joint (42) is connected with the first air outlet end (102) of the air charging and discharging control valve (10).

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