WO2011085689A1

WO2011085689A1 - Pressure adjustable air cushion shoulder strap and backpack including the same

Info

Publication number: WO2011085689A1
Application number: PCT/CN2011/070290
Authority: WO
Inventors: 林汉雄
Original assignee: 历卡路（亚洲）有限公司
Priority date: 2010-01-15
Filing date: 2011-01-14
Publication date: 2011-07-21
Also published as: CN102125348A

Abstract

A pressure adjustable air cushion shoulder strap comprises an air pressure adjustable shoulder strap back cushion (2) and an air charging device (4) utilized for charging air toward the shoulder strap back cushion (2). The shoulder strap back cushion (2) comprises an air pressure adjustable shoulder strap (21) and an air charging air cushion (22). The air charging device (4) comprises a movable air cylinder (42), which comprises a cylinder body (421), an air cylinder upper cover (422) and an air capsule column (423). A guide groove (4211) is opened and located on one lateral surface of the cylinder body (421). The air capsule column (423) is placed within the cylinder body (421), and the air cylinder upper cover (422) is placed within the cylinder body (421) and buckled with the air capsule column (423). An air inlet one-way valve (5) and an air conveying one-way valve (6) are located on the air inlet end and the air conveying end of the air capsule column (423), respectively. The air charging air cushion (22) is connected with the air conveying one-way valve (6) through a communicating pipe (7). The shoulder strap back cushion (2) is provided with an air discharging valve (8) connected with the internal part of the shoulder strap back cushion (2). The air cushion shoulder strap can automatically adjust the air pressure of the shoulder strap back cushion (2). A backpack is composed of the pressure adjustable air cushion shoulder strap and a bag body (1).

Description

Adjustable pressure air cushion shoulder strap and backpack containing the same. This application claims to be Chinese patent application filed on January 15, 2010, the Chinese Patent Office, application number 201010005142.9, and the invention titled "an adjustable pressure air cushion shoulder strap" Priority is hereby incorporated by reference in its entirety. Technical field

The invention relates to the technical field of shoulder straps, in particular to an adjustable pressure air cushion shoulder strap. Background technique

Backpacks are becoming more and more widely used in our daily lives. Whether it is going to school or traveling or hiking, going out to trade, we use backpacks. Traditional backpacks tend to focus only on the functionality of their loading. When designing or buying, more consideration is given to how many bags the backpack has, how many things can be loaded, or whether the appearance is good or not, but rarely consider the comfort and safety of the backpack. Sex.

In our traditional habits, we always like to pack as much as possible into our backpacks. In actual use, due to the long-term overload of the body, our body's shoulders, waist, neck and Many parts, such as the back, are often subjected to varying degrees of strain. Failure to improve for a long time can cause irreparable harm to our health. Therefore, people hope to have a backpack that is more comfortable and at the same time minimizes damage to the human body.

At present, the filler in the shoulder strap of the backpack is generally made of foamed cotton material. During the use of the shoulder strap, due to the weight, the contact portion of the shoulder strap and the shoulder is inwardly deformed and deformed. Due to the uncomfortable shoulder strap, it is often the user's practice to replace the new backpack. Just because of the local deformation of the shoulder strap, replacing the new backpack, resulting in waste of resources, contrary to the current savings advocated by the current society.

In order to solve the above problems, some people also set up a cushioning device on the basis of the existing backpack, for example, an air cushion is arranged on the back or shoulder strap of the backpack, but the air cushion pressure is constant, which affects the cushioning effect and the belt. The comfort of the coming, but also can not flexibly adjust the air pressure of the backpack air cushion according to the actual weight of the backpack. Summary of the invention It is an object of the present invention to provide an adjustable pressure airbag shoulder strap for the deficiencies of the prior art. To achieve the above object, the present invention adopts the following technical solutions:

An adjustable pressure airbag shoulder strap comprising an adjustable air pressure shoulder strap back pad and an inflator for inflating the shoulder strap back pad, the shoulder strap back pad comprising an adjustable air pressure shoulder strap and an inflatable air cushion The inflatable device includes an active cylinder, and the movable cylinder includes a cylinder block, a cylinder upper cover and a gas cylinder, and a guide groove is opened on one side of the cylinder body, and the air cylinder is placed in the cylinder body. The cylinder upper cover is placed in the cylinder and fastened to the gas column;

An intake check valve and a gas transfer check valve are respectively disposed at an intake end and a gas transfer end of the gas column; the inflatable air cushion is connected to the gas transfer check valve through a communication pipe, the shoulder The belt back pad is provided with a deflation valve in communication with the interior of the shoulder strap back pad.

Preferably, the inflator further includes a bracket, and two movable cylinders are respectively disposed on the two bracket rods of the bracket, and two movable cylinders on the same side are vertically disposed.

In the above, the inflator further includes a spring, and the spring is sleeved on the outer surface of the air column and placed in the cylinder.

Preferably, the deflation valve is disposed on a shoulder strap of the shoulder strap back pad.

Preferably, the intake check valve and the gas feed check valve are respectively embedded in the intake end and the gas transfer end of the gas column.

Preferably, the venting valve comprises a base made of a soft plastic material, a valve core and a spring, the base surface is integrally formed with a protrusion, and the base is provided with a through hole through which the valve core passes. The diameter of the middle portion of the valve core is smaller than the diameter of the two ends, the inner diameter of the through hole is smaller than the outer diameter of the two ends of the valve core, and the inner diameter of the through hole is larger than the outer diameter of the middle portion of the valve core; And disposed in the middle portion of the valve core and disposed in the protrusion, the valve core passes through the through hole of the base.

Preferably, the cylinder upper cover is provided with a buckle, the buckle is perpendicular to a vertical plane where the cylinder upper cover is located. Preferably, the buckle is composed of a nail post and a nail head, and the nail head is Sphere, cube or cylinder ^.

Preferably, a gas cap is disposed between the gas transmission check valve and the communication pipe, and one end of the gas transfer check valve is inserted into a cavity at one end of the gas cap, and the gas cap is additionally One end is inserted into the connecting tube; the shoulder strap back pad is provided with a connecting head, and the connecting head is integrally connected with the shoulder strap back pad, and the connecting head communicates with the inside of the shoulder strap back pad, the connecting head The other end is inserted into the communication tube and is tightly engaged with the communication tube. The invention also provides a backpack comprising an adjustable pressure airbag shoulder strap, comprising an adjustable pressure air cushion shoulder strap and a bag body, the structure and connection relationship of the adjustable pressure air cushion shoulder strap being as described above. a back plate is mounted on the back of the bag body, and a buckle hole is defined in the back plate. The cylinder upper cover of the air cushion shoulder strap inflator is provided with a buckle, and the buckle can be inserted into the buckle hole, thereby making the air cushion shoulder The belt is connected to the bag body.

Specifically, the shape of the back plate may be similar to the shape of the back surface of the bag body, or may extend from the four sides to the center to be equidistant from the four corners of the bag body, and the back plate may be a plastic plate or a metal plate or other support. The material of action, preferably an aluminum plate.

The invention also provides another backpack with an adjustable pressure air cushion shoulder strap, comprising an adjustable pressure air cushion shoulder strap and a bag body, the sleeve body is provided with a sleeve on the back side thereof, and the sleeve is sleeved with the support rod. The support rod is sleeved with the fastener, the fastener is provided with a buckle hole and a through hole, the support rod is nested from the through hole, and the support rod and the fastener can be further fixed by a metal fixing member. The buckle provided on the upper cover of the cylinder is inserted into the buckle hole, so that the air cushion shoulder strap is connected with the bag body.

Specifically, the sleeves may be correspondingly arranged according to the shape and the number of the support rods, may be disposed along the back of the bag body, or disposed diagonally, or horizontally or vertically along the axis; the sleeve material may be combined with the bag body material Similarly, the sewing machine is sewn on the back of the bag body. It can also be made of plastic material or rubber material and then bonded or stitched to the back of the bag body. The sleeve material is preferably a rubber material with good anti-friction properties. The diameter of the casing is matched with the support rod and should be placed just around the support tube.

Specifically, the number and arrangement position of the support rods can be flexibly set according to the type and size of the bag body, and the support rods can be formed into different shapes or different curved arcs according to the size of the bag body and the back shape of the bag body, and The tube is matched. The material of the support rod may be metal or rigid plastic, or other material that can serve as a support, preferably metal aluminum. The support rod is provided with a screw hole, and can be further screwed at the screw hole position after being engaged with the fastener.

Specifically, the number of the through holes on the fastener is adjusted according to the setting of the support rod, and the number and size of the buckle holes on the fastener should be adjusted according to the setting of the cylinder upper cover buckle of the air cushion shoulder strap inflation device, and the buckle cooperation use. A screw hole corresponding to the support rod is disposed on the fastener. After the fastener is inserted into the support rod, the position of the corresponding screw hole is further fixed by screws. A spare hole can be opened around the fastener. The number of spare holes can be flexibly set according to the material, size and shape of the bag. When the bag body is hard or unsuitable for fixing with the support rod, the bag body can be directly used with the fastener. The air cushion shoulder strap is connected, and the spare hole opened around the fastener is used as a screw hole, and is directly fixed to the bag body by screws. The material of the fastener may be made of a plastic material or a rubber material having good anti-friction properties, or may be made of a metal material, and the fastener is preferably a plastic material integrally formed. It is conceivable that under the premise of ensuring the use, the materials used for the backboard, the support rods and the fasteners are lighter in weight, and the smaller the amount, the more the weight of the backpack can be reduced, so the shape of the backboard, the support bars and the fasteners The change, the increase and decrease of the quantity, and the replacement of the material are also within the scope of protection of the present invention.

The support rods and fasteners can be flexibly combined according to the actual conditions of the bag. Under the premise of meeting the needs of the bag, the material can be saved to the utmost, the production cost can be reduced, the environment can be saved, and the weight of the bag can be reduced and the comfort of use can be improved. .

The invention has the following beneficial effects: when the invention is used, the inflator is movably connected with the back plate of the backpack. When the weight of the bag is increased, the bag body pushes the air on the cylinder cover of the inflator through the back plate due to the action of gravity. The gas column pushes the gas into the inflatable air cushion and the shoulder strap of the shoulder strap through the gas transmission check valve and the pipe, so that the air pressure of the inflatable air cushion and the shoulder strap increases, and the airbag increases as the weight of the bag increases. The air pressure of the air cushion and the shoulder strap is increased. Therefore, the air pressure of the air cushion and the shoulder strap can be automatically adjusted according to the weight of the bag body; when the weight of the bag body is reduced, if the user feels that the air pressure of the air cushion and the shoulder strap is excessively large, The deflation valve on the shoulder strap can be used to deflate, ensuring that the shoulder strap of the user's backpack is soft and hard for the user's needs, thereby making the user's shoulder more comfortable and effectively avoiding the use of the backpack. When the shoulder strap is partially sunken due to insufficient air pressure, the user can pull the backpack to inflate the air cushion in the shoulder strap. Straps recover inflated state, without having to replace the shoulder strap and conserve resources. DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

Figure 2 is an exploded perspective view of the gas column of the present invention;

Figure 3 is a schematic structural view of the movable cylinder of the present invention;

Figure 4 is an exploded perspective view of the movable cylinder of the present invention;

Figure 5 is a schematic structural view of a deflation valve according to an embodiment of the present invention;

Figure 6 is an exploded perspective view of the deflation valve of the embodiment of the present invention;

Figure 7 is a schematic view showing the structure of the present invention provided with four movable cylinders;

Figure 8 is a schematic structural view of the present invention in connection with a bag body;

Figure 9 is a schematic exploded view of the bag body of the present invention;

Figure 10 is an exploded perspective view of the backpack of the present invention having an adjustable pressure pad shoulder strap.

In Figures 1 to 10: Bag body 1

Shoulder strap back pad 2, shoulder strap 21, inflatable cushion 22

Back plate 3, buttonhole 31

Inflator 4, bracket 41, movable cylinder 42, cylinder 421, cylinder upper cover 422, air column 423, spring 424, guide groove 4211

Inlet check valve 5, gas check valve 6, connecting pipe 7

Bleed valve 8, base 81, spool 82, spring 83, projection 84, through hole 85

Studs 9, studs 91, nail heads 92

Air lid 10, connector 11

The present invention will be further described below in conjunction with the accompanying drawings:

Example 1

Referring to Figures 1 to 7, an adjustable pressure airbag shoulder strap includes an adjustable air pressure shoulder strap back pad 2 and an inflator 4 for inflating the shoulder strap back pad 2, the shoulder strap back pad 2 includes an adjustable air pressure shoulder strap 21 and an inflatable air cushion 22; the inflator 4 includes an active cylinder 42 including a cylinder block 421, a cylinder upper cover 422 and a gas cylinder 423, the cylinder block 421- The side opening is provided with a guide groove 4211, the gas cylinder 423 is placed in the cylinder block 421, the cylinder upper cover 422 is placed in the cylinder block 421, and is fastened to the gas column 423;

The intake end and the air supply end of the gas column 423 are respectively provided with an intake check valve 5 and a gas check valve.

6;

The gas cushion 22 is in communication with the gas feed check valve 6 through a communication pipe 7, and the shoulder belt back pad 2 is provided with a purge valve 8 communicating with the inside of the shoulder strap back pad 2.

Preferably, as shown in FIG. 7, the inflator 4 further includes a bracket 41. Two movable cylinders 42 are respectively disposed on the two bracket rods of the bracket 41, and two movable cylinders 42 on the same side are vertically disposed. The movable cylinder 42 simultaneously inflates the shoulder strap back pad 2, and the inflation speed is fast.

In the above, as shown in FIG. 4, the inflator 4 further includes a spring 424. The spring 424 is sleeved on the outer surface of the gas column 423 and placed in the cylinder 421, and the spring 424 can be The role of buffering and resetting.

Preferably, as shown in FIG. 1, the venting valve 8 is disposed on the shoulder strap 21 of the shoulder strap back pad 2, when When using the backpack, if the air pressure of the shoulder strap back pad 2 is too large, the hand can be lifted on the shoulder strap 21 to press the deflation valve 8, so that the air pressure of the shoulder strap back pad 2 can be adjusted to an appropriate size, and the adjustment is convenient.

Preferably, as shown in FIGS. 1 to 6, the intake check valve 5 and the gas transfer check valve 6 are respectively embedded in the intake end and the gas transfer end of the gas column 423, and the design structure is single, and The appearance of the gas column 423 is made more beautiful. In order to make the connection between the gas feed check valve 6 and the communication pipe 7 more tight, a gas cap 10 is disposed between the gas feed check valve 6 and the communication pipe 7, and the gas feed check valve 6 is end-fitted into the gas cap. In the cavity of the 10th end, the other end of the gas cap 10 is inserted into the communication tube 7, and the gas exchange check valve 6 and the gas cap 10, the gas cap 10 and the communication tube 7 are both sealed and sealed, and no gas leakage occurs. In order to ensure that the connecting tube 7 and the shoulder strap back pad 2 are more closely connected, a connecting head 11 can be disposed on the shoulder strap back pad 2, and the connecting head 11 is integrally connected with the shoulder strap back pad 2, and the connecting head 11 The other end of the connector head 11 is inserted into the communication tube 7 and is tightly engaged with the communication tube 7. The communication tube 7 communicates with the inside of the shoulder strap back pad 2 through the connector 11 and ensures communication. The sealing of the tube 7 to the shoulder strap back pad 2 is sealed.

Preferably, the venting valve 8 comprises a base 81 made of a soft plastic material, a valve core 82 and a spring 83. The valve core 82 is made of a metal material, and the surface of the base 81 is integrally formed. a protrusion 84, the base 81 is provided with a through hole 85 through which the valve core 82 passes. The diameter of the middle portion of the valve core 82 is smaller than the diameter of the two ends, and the inner diameter of the through hole 85 is smaller than the valve core 82. The outer diameter of the two ends is sleeved in the middle of the valve body 82 and placed in the protrusion 84. The valve core 82 passes through the through hole 85 of the base 81. Since the inner diameter of the through hole 85 is smaller than the outer diameter of the both ends of the valve body 82, the inner diameter of the through hole 85 is larger than the outer diameter of the middle portion of the valve body 82; when the valve core 82 passes through the through hole of the base 81 After 85, both ends of the valve core 82 close both sides of the through hole 85, so that the gas in the shoulder strap back pad 2 does not leak out, and when the air is required to be deflated, the outer end portion of the valve body 82 is pressed hard, the valve The core 82 moves inwardly, and a gas passage is formed between the middle portion of the valve body 82 and the through hole 85. The gas in the shoulder belt back pad 2 is discharged through the air release passage; after the hand is released, the valve core 82 functions as the spring 83. Under the lower reset, both ends of the valve body 82 again close both sides of the through hole 85, so that the gas in the shoulder strap back pad 2 is not leaked.

Preferably, as shown in FIG. 3, 4, 9, the cylinder upper cover 422 is provided with a buckle 9 which is perpendicular to a vertical plane where the cylinder upper cover 422 is located, and the buckle 9 is composed of a staple The nail head 92 is connected to the nail head 92. The nail head 92 is connected to the nail post 91. The nail head 92 is larger than the nail post 91, so that the nail head 92 is fastened into the buckle hole 31 without slipping. The nail head 92 is a sphere. Shape, cube, cylinder and various other shapes.

The utility model relates to a backpack comprising the adjustable pressure air cushion shoulder strap of the invention, comprising an adjustable pressure air cushion shoulder strap and a bag body. The structure and connection relationship of the adjustable pressure air cushion shoulder strap are as described above, and the adjustable pressure air cushion shoulder strap is Bag connection The relationship is shown in Figures 9 and 10.

In Fig. 9, a back plate 3 is attached to the back of the bag body 1, and the back plate 3 and the bag body 1 are fixed by screws. A buckle hole 31 is defined in the back plate 3, and a pin 9 provided on the upper cover of the inflator 4 is inserted into the buckle hole 31, so that the air cushion shoulder strap is movably connected to the bag body 1.

10 is another type of backpack including the adjustable pressure pad shoulder strap of the present invention. The back of the bag body 1 is provided with a sleeve 11 , the sleeve 11 is sleeved with the support rod 32 , and the support rod 32 is sleeved with the fastener 33 , and the fastener is fastened. The buckle hole 31 and the through hole 34 are symmetrically disposed at opposite ends of the 33, and the buckle hole 31 and the through hole 34 are connected by the connecting member 35. The diameter of the through hole 34 is slightly larger than the diameter of the support rod 32, so that the support rod 32 can be inserted into the through hole 34, A screw hole is provided corresponding to the joint of the support rod 32 and the through hole 34, and is further fixed by screws. A clip 9 provided on the upper cover of the cylinder is inserted into the buckle hole 31 to connect the airbag shoulder strap to the bag body 1. A spare hole 36 is formed around the fastener 33, and the spare hole can be used as a screw hole. When it is further fixed, it is directly fixed to the bag body 1 by screws.

As shown in FIG. 1 to FIG. 10, when the present invention is used, the inflator 4 of the present invention is mounted on the bag body 1. The specific mounting method is as follows. The back of the bag body 1 is mounted with a back plate 3, and the back plate 3 is opened. There is a buckle hole 31 into which the buckle 9 of the cylinder upper cover 422 is inserted. Because the backboard 3 is fixedly connected to the bag body 1, the bracket 41 is fixedly connected with the shoulder strap back pad 2. When the shoulder strap back pad 2 needs to be inflated, the bag body 1 is moved downward by hand, and the bag body is moved. 1 will drive the back plate 3 to move downward, and the back plate 3 moves downward, which will drive the pin 9 to move downward, and then drive the cylinder upper cover 422 to press the gas column 423 downward, and the gas column 423 is located at the gas transmission end of the gas column 423. The valve of the gas check valve 6 is opened, and the gas is filled into the shoulder strap back pad 2 through the gas feed check valve 6 and the communication pipe 7 to complete an inflation; at this time, the external air pressure is greater than the air pressure in the gas column 423, and is located in the gas. The valve of the intake check valve 5 at the intake end of the mast 423 is opened, the outside air is replenished into the gas column 423, and the next inflation is prepared; and, when the cylinder upper cover 422 is reset by the action of the spring 424, due to the gas transmission The presence of the check valve 6 causes the gas in the shoulder strap back pad 2 not to flow back into the intake mast 423 through the communication tube 7, and does not affect the inflation effect; if, the pressure inside the shoulder strap back pad 2 is considered to be too large, Can only pass through the bleed valve placed on the shoulder strap back pad 2 8 Perform deflation to adjust the air pressure in the shoulder strap back pad 2.

In the actual use process, the various bag bodies 1 and the shoulder strap back pad 2 which the user feels comfortable can be arbitrarily combined to meet the various needs of the user, and the service life of the invention is prolonged, thereby reducing the life. The cost of use also saves social resources.

In actual production, the adjustable inflatable air cushion 22 on the shoulder strap back pad 2 is detachably disposed in the shoulder strap back pad 2, and when the inflatable air cushion 22 leaks or cannot be inflated, the inflatable air cushion 22 can be used. Remove it and replace it with a new inflatable air cushion 22 to save social resources.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments. It is not intended that the specific embodiments of the invention are limited to the description. For those skilled in the art to which the present invention pertains, the architectural form can be flexibly varied without departing from the inventive concept, and a series of products can be derived. Any deduction or replacement of a single cartridge is considered to be within the scope of the patent protection as defined by the appended claims.

Claims

Rights request

What is claimed is: 1. An adjustable pressure airbag shoulder strap comprising an adjustable air pressure shoulder strap back pad and an inflator for inflating the shoulder strap back pad, the shoulder strap back pad comprising an adjustable air pressure shoulder strap and Inflatable air cushion; characterized by:

The inflator includes an active cylinder, the movable cylinder includes a cylinder, a cylinder upper cover and a gas cylinder, and a cylinder is opened on one side of the cylinder, and the gas cylinder is placed in the cylinder, a cylinder upper cover is placed in the cylinder body and fastened to the gas column;

2. The adjustable pressure airbag shoulder strap according to claim 1, wherein: the inflator further comprises a bracket, and the two bracket rods of the bracket are respectively provided with two movable cylinders on the same side. The two active cylinders are arranged vertically.

3. The adjustable pressure airbag shoulder strap according to claim 1 or 2, wherein: the inflator further comprises a spring, the spring sleeve is sleeved on the outer surface of the air column, and placed Inside the cylinder.

4. An adjustable pressure airbag shoulder strap according to claim 1 or 2, wherein: said deflation valve is disposed on a shoulder strap of said shoulder strap back pad.

5. An adjustable pressure air-cushion shoulder strap according to claim 1 or 2, wherein: said air intake check valve and said air supply check valve are respectively embedded in an intake end and a transmission of said air column Gas end.

6. The adjustable pressure airbag shoulder strap according to claim 1 or 2, wherein: the air release valve comprises a base made of a soft plastic material, a valve core and a spring, and the surface of the base is integrally formed. a protrusion, the base is provided with a through hole for the valve core to pass through, a diameter of a middle portion of the valve core is smaller than a diameter of the two ends, and an inner diameter of the through hole is smaller than an outer diameter of the two ends of the valve core The inner diameter of the through hole is larger than the outer diameter of the middle portion of the valve core; the spring is sleeved in the middle portion of the valve core, and is placed in the protrusion, and the valve core passes through the base hole.

7. An adjustable pressure airbag shoulder strap according to claim 1 or 2, wherein: said cylinder upper cover is provided with a buckle, said fastener being perpendicular to a vertical plane of said cylinder upper cover The stud is composed of a stud and a nail head, and the nail head is spherical, cubic or cylindrical.

8. An adjustable pressure airbag shoulder strap according to claim 1 or 2, characterized in that: said gas transmission An air venting cover is disposed between the one-way valve and the connecting pipe, and one end of the gas-passing check valve is inserted into a cavity at one end of the gas venting cap, and the other end of the gas venting cap is inserted into the communicating pipe; The shoulder strap back pad is provided with a connector, the connector is integrally connected with the shoulder strap back pad, and the connector is in communication with the interior of the shoulder strap back pad, and the other end of the connector is inserted into the communication tube And tightly mating with the connecting pipe.

9. A backpack comprising the adjustable pressure pad shoulder strap of claim 1, comprising: the adjustable pressure pad shoulder strap and the bag body, wherein: the back of the bag body is mounted with a back plate, the back A buttonhole is defined in the plate, and the cylinder upper cover of the airbag shoulder strap inflator is provided with a buckle, and the buckle is inserted into the buckle hole to connect the adjustable pressure pad shoulder strap with the bag body.

10. A backpack comprising the adjustable pressure pad shoulder strap of claim 1, comprising: the adjustable pressure pad shoulder strap and the bag body, wherein the back of the bag body is provided with a sleeve, the sleeve The support rod is sleeved with the support rod, the support rod is sleeved with the fastener, the fastener is provided with a buckle hole and a through hole, and the support rod is nested from the through hole, the support rod and the fastener It can be further fixed with a metal fixing member. The buckle provided on the upper cover of the cylinder is inserted into the buckle hole, so that the air cushion shoulder strap is connected with the bag body.

The backpack according to claim 10, wherein a spare hole is arranged around the fastener, and the bag body and the fastener are fixed at the spare hole by a metal fixing member, and the fastener is opened. The buckle hole is inserted into the buckle hole to connect the air cushion shoulder strap to the bag body.