One-way air inlet valve and cushion airbag cushion with one-way air inlet valve

Abstract

The invention provides a one-way air inlet valve and a cushion airbag cushion provided with the one-way air inlet valve. The one-way air inlet valve (10) comprises a shell (11) which is fixed to an air inlet (1) of a buffering air bag cushion (200) and internally provided with a first cavity (11a), and the first cavity is communicated with the air inlet (1) of the buffering air bag cushion (200) and a plurality of air bags (205) of the buffering air bag cushion (200); the one-way air inlet component (17) is clamped in the first cavity (11a) of the shell (11) and comprises a ball (13), the one-way air inlet component (17) can enable external air to enter the air bag of the buffering air bag cushion in a one-way mode through movement of the ball (13) and prevent the air in the air bag of the buffering air bag cushion from leaking to the outside, and the ball (13) is not in contact with the shell (11).

Description

Technical Field

[0001] The present invention belongs to the field of daily necessities, and particularly relates to a one-way air inlet valve and a buffer airbag pad having the one-way air inlet valve. Background Art

[0002] As an article for providing buffer pressure, the airbag pad is widely used in various products. For example, buffer pads such as bag straps, seat cushions, back cushions, mattresses, and insoles can buffer the pressure on the user's contact part.

[0003] However, in the existing airbag pads, after the gas enters the airbag of the airbag pad, a part of the gas will slowly leak to the outside through the air inlet. Therefore, the overall airbag pad shows a slow air leakage phenomenon, resulting in insufficient gas in the airbag after the user has used the pad body for a period of time, and the user needs to inflate it again, which makes the use inconvenient.

[0004] The patent with the international publication number WO2023 / 082525 discloses an air inlet valve, which includes an air outlet part, a ball, and an air inlet part. The air outlet part is used to install the air inlet valve on the buffer airbag pad. Usually, the air outlet part is fixed to the buffer airbag pad by using glue or high-frequency welding. The principle of high-frequency welding is that the materials of the inner wall of the pad body of the buffer airbag pad and the air outlet part can be melted under high frequency and welded to each other, so that the air outlet part can be attached to the buffer airbag pad. However, the inventor found that during the process of attaching the air inlet valve to the buffer airbag pad, or in the subsequent processes that require the use of glue or high-frequency melting, the excess glue or the sol generated by high-frequency melting will overflow, and sometimes overflow into the cavity of the air outlet part. The size of the air outlet part is very small, so the cavity is also narrow. When assembling the ball and the air inlet part to the air outlet part, the glue that overflows into the cavity of the air outlet part hinders the movement of the ball and the installation of the air inlet part to the air outlet part that has been attached to the pad body of the buffer airbag pad, resulting in the ball being unable to move smoothly and causing air leakage, and the air outlet part and the air inlet part being unable to be assembled airtightly and causing air leakage. Summary of the Invention

[0005] The solution of the present invention is proposed to solve the above problems.

[0006] One technical solution of the present invention is a one-way intake valve, which is arranged at the intake port of a buffer airbag pad having a plurality of airbags. The one-way intake valve includes: a housing fixed to the intake port of the buffer airbag pad, a first cavity is provided inside the housing, and the first cavity is communicated with the intake port of the buffer airbag pad and the plurality of airbags of the buffer airbag pad; and a one-way intake component, which is engaged in the first cavity of the housing and includes a ball. The one-way intake component can unidirectionally introduce external gas into the airbag of the buffer airbag pad through the movement of the ball, and prevent the gas in the airbag of the buffer airbag pad from leaking to the outside. The ball does not contact the housing.

[0007] Further, the one-way intake component further includes a cover body and a base. The ball is received in the base and can move between the cover body and the base to achieve one-way intake. The cover body and the base are engaged with each other, and a connection gap is formed at the connection between the cover body and the base. In the state where the one-way intake component is installed in the housing, the connection gap is abutted by the inner wall of the housing to be airtight.

[0008] Further, the cover body has a main body portion tightly disposed in the first cavity and has a second cavity inside. The base has an installation portion tightly disposed in the second cavity and has a third cavity inside. The ball is movably disposed in the third cavity.

[0009] Further, the housing has a first intake surface and a first outlet surface disposed opposite to each other. The first cavity is formed by being recessed from the first intake surface toward the first outlet surface and penetrates through the first intake surface. An air outlet hole is penetrated through the first outlet surface. The cover body has a second intake surface and a second outlet surface disposed opposite to each other. The second cavity is formed by being recessed from the second intake surface toward the second outlet surface and penetrates through the second intake surface. A ventilation hole is penetrated through the second outlet surface. The base has a third intake surface and a third outlet surface disposed opposite to each other. The third cavity is formed by being recessed from the third outlet surface toward the third intake surface and penetrates through the third outlet surface. An intake hole is penetrated through the third intake surface. The gas from the outside enters the airbag of the buffer airbag pad in sequence through the intake hole, the ventilation hole and the air outlet hole.

[0010] Further, the intake hole has a shape that prevents the ball from passing through and matches the ball. The ventilation hole has a shape that prevents the ball from passing through and does not match the ball. Thus, when the ball rolls to the intake hole, the intake hole is blocked, and when the ball rolls to the ventilation hole, the gas passes through the ventilation hole.

[0011] Further, the first cavity penetrates through a first air inlet surface on one side of the housing facing the outside of the buffer airbag pad. A guiding surface is formed on the first air inlet surface. The cover body has a second air inlet surface and a second air outlet surface arranged opposite to each other. The second cavity is formed by being recessed from the second air inlet surface towards the second air outlet surface and penetrates through the second air inlet surface. The cover body further has a narrow portion which extends in a direction narrowing away from the outside of the buffer airbag pad from the main body portion. An end surface of the narrow portion on the side away from the main body portion is the second air outlet surface. The shape of the guiding surface matches the shape of the narrow portion.

[0012] Further, the base further has a flange portion which is arranged at an end of the mounting portion close to the outside of the buffer airbag pad and is tightly abutted against the main body portion and arranged in the first cavity. A gap between the flange portion and the main body portion forms the connection gap. The inner wall of the first cavity of the housing covers the connection gap and is tightly abutted against the flange portion and the main body portion.

[0013] Further, the housing is elastic, and due to the elastic deformation of the housing, the flange portion and the main body portion are tightly abutted against the inner wall of the first cavity.

[0014] Further, the third air outlet surface is tightly abutted against the inner wall of the second cavity of the cover body. An opening formed at the third air outlet surface of the third cavity is the largest, and as it approaches the air inlet hole, the third cavity gradually narrows. When the ball in the third cavity rolls under the push of the air flow towards the air inlet hole, the inner wall of the third cavity guides the ball to move along the narrowing direction of the third cavity, so as to quickly block the air inlet hole and prevent the gas from leaking to the outside of the buffer airbag pad.

[0015] Another technical solution of the present invention is a buffer airbag pad, which includes: a plurality of airbags, including: a first airbag having an air inlet communicating with the outside and communicating with other airbags; a plurality of air channels connecting and communicating the plurality of airbags; and a one-way air inlet valve arranged at the air inlet. The one-way air inlet valve includes: a housing fixed to the air inlet of the buffer airbag pad, with a first cavity built in the housing, and the first cavity communicates with the air inlet of the buffer airbag pad and a plurality of airbags of the buffer airbag pad; and a one-way air inlet component engaged in the first cavity of the housing and including a ball. The one-way air inlet component can unidirectionally introduce external gas into the airbags of the buffer airbag pad through the movement of the ball, and prevent the gas in the airbags of the buffer airbag pad from leaking to the outside, and the ball does not contact the housing.

[0016] The one-way intake valve and the buffer airbag pad designed by the present invention solve the problem that the previous structure causes overflow glue, resulting in the inability of the ball to roll smoothly. Compared with the prior art, by the simple structure of the one-way intake valve, the slow leakage of gas can be prevented, and thus the air leakage of the buffer airbag pad can be effectively prevented. Furthermore, it is not necessary to inflate frequently, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a top view schematic diagram of the buffer airbag pad related to the present invention.

[0018] Figure 2 FIG. is a three-dimensional schematic diagram of the buffer airbag pad related to the present invention.

[0019] Figure 3 FIG. is a schematic diagram of the respective components of the one-way intake valve related to the present invention.

[0020] Figure 4 FIG. is a schematic diagram of the respective components of the one-way intake valve related to the present invention.

[0021] Figure 5 FIG. is a three-dimensional view of the one-way intake valve related to the present invention.

[0022] Figure 6 FIG. is a sectional view of an example of the one-way intake valve related to the present invention taken along the cutting line VI-VI of Figure 5 FIG. is a sectional view of an example of the one-way intake valve related to the present invention taken along the cutting line VI-VI of

[0023] Figure 7 FIG. is a sectional view of another example of the one-way intake valve related to the present invention taken along the cutting line VI-VI of Figure 5 FIG. is a sectional view of another example of the one-way intake valve related to the present invention taken along the cutting line VI-VI of DETAILED DESCRIPTION OF THE INVENTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Figure 1 、 Figure 2 FIG. is a buffer airbag pad 200 related to the present invention, which includes a body 201 and an airbag auxiliary component (not shown) provided on the body 201.

[0026] The body 201 includes a plurality of air channels 203 and a plurality of airbags 205 connected through the plurality of air channels 203. The airbag auxiliary component is connected to communicate with the airbags 205 to control the air outlet and air inlet of the plurality of airbags 205. The plurality of air channels 203 and the plurality of airbags 205 are in a convex shape.

[0027] In this embodiment, the main body 201 further includes an upper cushion 207 and a lower cushion 209. A plurality of air passages 203 and a plurality of airbags 205 are formed on the upper cushion 207 in a specified shape. The lower cushion 209 is attached to the part of the upper cushion 207 where the plurality of air passages 203 and the plurality of airbags 205 are not formed. Thus, one airbag 205 is formed by the sealing attachment of the upper cushion 207 and the lower cushion 209. The upper cushion 207 and the lower cushion 209 may be made of a plastic material containing PVC, TPU, EVA, etc.

[0028] The airbag auxiliary component includes an air intake component 60 and an air outlet component 80. The air intake component 60 is used to allow external gas to be filled into the plurality of airbags 205 unidirectionally, and the air outlet component 80 is used to discharge the gas in the plurality of airbags 205 to the outside.

[0029] The air intake component 60 is connected to adjacent airbags 205 among the plurality of airbags 205 through at least one air passage 203 in a communicating manner, and has the function of pressing gas from the outside into the plurality of airbags 205 of the main body 201. The air outlet component 80 is respectively connected to adjacent airbags 205 through at least one air passage 203 in a communicating manner, and has the function of releasing the gas in the plurality of airbags 205 of the main body 201. The air intake component 60 and the air outlet component 80 are not directly communicated, but are connected and communicated via a series connection of the plurality of airbags 205 and the plurality of air passages 203.

[0030] The specific structure of the airbag auxiliary component will be described in detail as follows.

[0031] Continue to refer to Figure 1 and Figure 2 As shown, the air intake component 60 has an air inlet 1, a first airbag 2, an air intake passage 3, a second airbag 4, a one-way air intake valve 10, and a one-way air intake member (not shown in the figure). The first airbag 2, the second airbag 4, and the air intake passage 3 are convex.

[0032] The air inlet 1 may be formed by separating a part of the upper cushion 207 and / or the lower cushion 209, may be formed by protruding on the upper cushion 207 in a specified shape, or may be externally connected to the tubular structure of the first airbag 2, which can be designed according to actual needs.

[0033] The first airbag 2 is used to intake air from the outside and allow the gas to enter the second airbag 4. An air inlet 1 is provided on one side of the first airbag 2, and the air inlet 1 is in communication with the outside. An air intake passage 3 is provided on the other side of the first airbag 2 opposite to the second airbag 4 to connect the first airbag 2 and the second airbag 4 in a communicating manner. Thus, the air intake passage 3 is in communication with the air inlet 1. The first airbag 2 may contain an elastomer 21 and a one-way air intake valve 10.

[0034] The elastomer 21 supports the first airbag 2 to bulge in the natural state, so that gas enters through the air inlet 1 and fills the first airbag 2. When the first airbag 2 is pressed, the one-way intake valve 10 prevents the gas from leaking to the outside. At this time, under the action of the pressure difference, the gas in the first airbag 2 enters the second airbag 4 through the intake airway 3. Then, the first airbag 2 is released. Under the elastic reset action of the elastomer 21, the elastomer 21 supports the first airbag 2 to reset. At this time, under the action of the pressure difference, while the gas is inhaled into the first airbag 2 through the air inlet 1 and the one-way intake valve 10, the one-way intake member prevents the gas in the second airbag 4 from being inhaled into the first airbag 2. By repeatedly pressing and releasing the first airbag 2, the inflation of the main body 201 can be realized.

[0035] It can be understood that the elastomer 21 can be any one of a sponge body, a plastic body, a spring, rubber, and silica gel, as long as it is a component with elasticity. Further, the elastomer 21 can also be replaced, as long as the first airbag 2 is composed of a compressible and reboundable structure.

[0036] The second airbag 4 is used to ventilate multiple airbags 205. The second airbag 4 is connected to the first airbag 2 through the intake airway 3 as described above, and is respectively connected to adjacent airbags 205 through at least one airway 203.

[0037] The one-way intake member is arranged between the second airbag 4 and the first airbag 2, allowing gas to flow from the first airbag 2 to the second airbag 4, but preventing gas from flowing from the second airbag 4 to the first airbag 2. In addition, a one-way valve can also be used instead of the one-way intake member.

[0038] In addition, the air outlet assembly 80 has a third airbag 8 and an air outlet 5, and can also include an air outlet valve (not shown). The third airbag 8 is respectively connected to adjacent airbags 205 through at least one airway 203, and the third airbag 8 is connected to the second airbag 4 through the main body 201 in which all the airbags 205 and all the airways 203 are connected in series. The one-way air outlet valve is installed at the air outlet 5 of the third airbag 8, so that gas can only flow out of the air outlet 5 and cannot flow in, thereby ensuring one-way deflation of the gas.

[0039] As follows, with reference to Figures 3 to 7 , the structure of the one-way intake valve 10 of the present invention will be described in detail.

[0040] The one-way intake valve 10 includes a housing 11 and a one-way intake component 17. The one-way intake valve 10 is installed in the air inlet 1, and the air inlet 1 is connected and communicated with the first airbag 2. Thus, the first airbag 2 allows external gas to enter or prevents the gas in the first airbag 2 from leaking to the outside through the one-way intake valve 10. Therefore, the one-way intake valve 10 ensures that external gas can only enter the first airbag 2 and the gas in the first airbag 2 cannot leak outwards. Furthermore, the one-way intake valve 10 plays a role of one-way intake.

[0041] The outer peripheral wall of the housing 11 is in close contact connection with the air inlet 1, preventing gas from leaking through the gap between the housing 11 and the air inlet 1. In this embodiment, when the housing 11 is fixed to the air inlet 1 of the buffer airbag pad 200, it is fixed by adhesives such as glue or high-frequency welding. Therefore, there is a situation where glue or the sol generated by high-frequency melting enters the interior of the housing 11.

[0042] The housing 11 includes a first air outlet surface 114 and a first air inlet surface 115 which are oppositely arranged. In the housing 11, along the direction of gas entering the buffer airbag pad 200 from the outside, the first air inlet surface 115 is arranged closer to the outside than the first air outlet surface 114. In the following description, the direction towards the first air inlet surface 115 is the direction towards the outside, that is, the direction away from the plurality of airbags 205 of the buffer airbag pad 200, and the direction towards the first air outlet surface 114 is the direction towards the plurality of airbags 205 of the buffer airbag pad 200. Between the first air inlet surface 115 and the first air outlet surface 114, a first cavity 11a is formed inside the housing 11. Specifically, the first cavity 11a is formed by being recessed from the first air inlet surface 115 towards the first air outlet surface 114, and the first air inlet surface 115 is penetrated. The first cavity 11a is used to accommodate the one-way air intake component 17. An air outlet hole 118 is penetrated and opened in the first air outlet surface 114. The air outlet hole 118 is communicated with the first cavity 11a and has a diameter smaller than that of the first cavity 11a. Although in the drawings, the cross-section of the air outlet hole 118 is shown as a rectangle, the present application is not limited thereto, and the design can be changed according to actual needs. The first airbag 2 is communicated with the first cavity 11a of the housing 11 through the air outlet hole 118.

[0043] In this embodiment, the housing 11 can be elastic and includes plastic materials such as PVC, TPU, EVA, etc. When the diameter of the inner wall of the first cavity 11a of the housing 11 is set slightly smaller than that of the one-way air intake component 17, when the one-way air intake component 17 is snapped into the first cavity 11a, the housing 11 elastically deforms and closely fits with the outer peripheral wall of the one-way air intake component 17, thereby ensuring that the one-way air intake component 17 does not leak air.

[0044] An inclined guiding surface 116 for guiding the installation of the one-way air intake component 17 into the first cavity 11a of the housing 11 is formed on the first air inlet surface 115. The guiding surface 116 gradually approaches the inside of the first cavity 11a as it faces the first air outlet surface 114, that is, the diameter of the part with the guiding surface 116 becomes smaller. The guiding surface 116 can be formed as a chamfer, a fillet, or a combination thereof.

[0045] In addition, it can be as Figure 6As shown, near the end of the first intake surface 115, a hook portion 117 bulges from the inner wall of the first cavity 11a, and the bulging surface of the hook portion 117 can be the above-mentioned guiding surface 116. By tightly abutting and engaging the hook portion 117 with the one-way intake component 17, it is possible to prevent the situation where the one-way intake component 17 is not properly installed, resulting in poor sealing between the one-way intake component 17 and the housing 11 and air leakage. It can be understood that the hook portion 117 can be omitted as Figure 7 shown.

[0046] The one-way intake component 17 includes a cover body 12, a base 14, and a ball 13. The ball 13 is received in the base 14, and then the cover body 12 and the base 14 are snap-fitted together.

[0047] The cover body 12 includes a second air outlet surface 124 and a second air intake surface 125 that are oppositely arranged. In the cover body 12, along the direction in which gas enters the buffer airbag pad 200 from the outside, the second air intake surface 125 is arranged closer to the outside than the second air outlet surface 124. In the following description, the direction toward the second air intake surface 125 is the direction toward the outside, that is, the direction away from the plurality of airbags 205 of the buffer airbag pad 200, and the direction toward the second air outlet surface 124 is the direction toward the plurality of airbags 205 of the buffer airbag pad 200. A narrow portion 121 and a main body portion 122 are formed between the second air intake surface 125 and the second air outlet surface 124. A second cavity 12a is formed inside the narrow portion 121 and the main body portion 122 of the cover body 12. The second cavity 12a is recessed from the second air intake surface 125 toward the second air outlet surface 124 and penetrates the second air intake surface 125. The second cavity 12a is used to receive a part of the base 14. A vent hole 128 is opened in the second air outlet surface 124. The vent hole 128 communicates with the second cavity 12a and has a diameter smaller than that of the second cavity 12a. Although in the drawings, the cross-section of the vent hole 128 is shown as a rectangle, the present application is not limited thereto. As long as the vent hole 128 is in a shape that prevents the ball 13 from passing through and does not match the ball 13, so that it will not be blocked by the ball 13 and cause air blockage, its opening shape can be arbitrarily set. The entire cover body 12 is received in the first cavity 11a. The vent hole 128 of the cover body 12, the second cavity 12a, the air outlet hole 118 of the housing 11, and the first cavity 11a communicate with each other, so that the second cavity 12a also communicates with the first airbag 2.

[0048] The outer diameter of the main body portion 122 matches the diameter of the first cavity 11a of the housing 11, and the outer peripheral wall of the main body portion 122 is in close contact with the inner wall of the first cavity 11a, and a second air inlet surface 125 of the cover body 12 is formed on the side away from the air outlet 118. Since the outer peripheral wall of the main body portion 122 is in close contact with the inner wall of the first cavity 11a, the airtightness of the one-way air inlet valve 10 can be achieved, preventing gas from leaking through the gap between the cover body 12 and the housing 11, effectively preventing air leakage of the buffer airbag pad 200, and thus there is no need to frequently inflate, which is convenient to use.

[0049] The outer peripheral wall of the narrow portion 121 is an inclined surface. In other words, the narrow portion 121 extends in a narrowing manner from the main body portion 122 toward the direction away from the second air inlet surface 125. And, the narrow portion 121 forms a second air outlet surface 124 of the cover body 12 on the side of the air outlet 118, and the outer diameter of the formed second air outlet surface 124 is smaller than the outer diameter of the main body portion 122. The outer peripheral wall of the narrow portion 121 can correspond to the guiding surface 116 of the housing 11 and is formed as a chamfer, a rounded corner or a combination thereof that matches the shape of the guiding surface 116. In other words, the narrow portion 121 is disposed in the first cavity 11a and has an outer diameter smaller than the diameter of the first cavity 11a. Through the narrow portion 121 and the guiding surface 116, when the cover body 12 is relative to the housing 11, it can smoothly enter the first cavity 11a. Moreover, through the narrow portion 121, it can also be avoided that even if there is overflow glue attached to the inner wall of the first cavity 11a, it can be pushed to the inclined surface of the narrow portion 121 and the inner wall of the first cavity 11a when the cover body 12 enters the first cavity 11a.

[0050] In addition, it can be understood that the narrow portion 121 can be omitted, and the main body portion 122 forms the second air outlet surface 124 of the cover body 12 on the side of the air outlet 118.

[0051] The cover body 12 is disposed in the first cavity 11a of the housing 11 and is in close contact with the inner wall of the first cavity 11a. In addition to making the outer peripheral wall of the main body portion 122 in close contact with the inner wall of the first cavity 11a, the second air outlet surface 124 can also be in close contact with the inner wall of the first cavity 11a on the first air outlet surface 114 side, further realizing the airtightness of the one-way air inlet valve 10, preventing gas from leaking through the gap between the cover body 12 and the housing 11, effectively preventing air leakage of the buffer airbag pad, and thus there is no need to frequently inflate, which is convenient to use.

[0052] The ball 13 is movably arranged within the base 14 of the one-way intake valve 10, and the following third cavity 14a functions as the movable cavity of the one-way intake valve 10. The ball 13 is spherical, the ball 13 does not come out of the vent hole 128 and the intake hole 149, and rolls between the vent hole 128 and the intake hole 149. Thus, the ball 13 rolls between the vent hole 128 and the intake hole 149 without contacting the housing 11. Therefore, even if there is overflow glue within the housing 11, it will not affect the movement of the ball 13.

[0053] The base 14 is engaged with the cover 12. The base 14 includes a third air outlet surface 144 and a third air inlet surface 145 which are oppositely arranged. In the base 14, along the direction in which gas enters the buffer airbag pad 200 from the outside, the third air inlet surface 145 is arranged closer to the outside than the third air outlet surface 144. In the following description, the direction towards the third air inlet surface 145 is the direction towards the outside, that is, the direction away from the plurality of airbags 205 of the buffer airbag pad 200, and the direction towards the third air outlet surface 144 is the direction towards the plurality of airbags 205 of the buffer airbag pad 200. An installation portion 141, a flange portion 142 and a seat portion 143 are formed between the third air inlet surface 145 and the third air outlet surface 144. A third cavity 14a is formed inside the installation portion 141, the flange portion 142 and the seat portion 143 of the base 14. The third cavity 14a is formed by being recessed from the third air outlet surface 144 towards the third air inlet surface 145, penetrates through the third air outlet surface 144, and an opening 148 is formed on the side of the third air outlet surface 144. The opening 148 is communicated with the third cavity 14a, and the third cavity 14a is used for accommodating the ball 13. An air inlet hole 149 is formed in the third air inlet surface 145. The air inlet hole 149 is communicated with the third cavity 14a and has a diameter smaller than that of the third cavity 14a. In addition, the shape of the third cavity 14a can be appropriately changed as long as the ball 13 can roll smoothly. Preferably, the third cavity 14a is the largest at the opening 148 on the side of the third air inlet surface 145 and gradually narrows as it approaches the air inlet hole 149, that is, the inner wall of the third cavity 14a is formed with an inclined inner wall surface. Thus, when the ball 13 in the third cavity 14a is pushed by the airflow towards the air inlet hole 149 and rolls, the inner wall of the third cavity 14a guides the ball 13 to move along the narrowing direction of the third cavity 14a, so as to quickly block the air inlet hole 149 and prevent gas leakage. Although in the drawings, the cross-section of the air inlet hole 149 is shown as a circle, the present application is not limited thereto. As long as the air inlet hole 149 can prevent the ball 13 from passing through and has a shape matching the ball 13, so that the ball 13 can block the air inlet hole 149, its opening shape can be set arbitrarily. For example, the cross-section of the air inlet hole 149 can be a circle with a diameter smaller than the diameter of the ball 13, and the cross-section of the air inlet hole 149 can be a plurality of continuous concentric circular cross-sections formed along a part of the outer surface of the ball 13, and the diameters of the plurality of circular cross-sections become smaller as they are away from the center of the circle. In addition, in order to make the installation of the base 14 relative to the cover 12 smooth, chamfers, rounded corners or a combination thereof that match each other can also be provided on the second air inlet surface 125 of the cover 12 and the third air outlet surface 144 of the base 14. The air inlet hole 149, the third cavity 14a and the opening 148 are communicated with each other and are communicated with the outside. The outer diameter of the installation portion 141 matches the diameter of the second cavity 12a of the cover 12. The installation portion 141 is arranged in the second cavity 12a, and the outer peripheral wall of the installation portion 141 is in close contact with the inner wall of the second cavity 12a, and the third air outlet surface 144 of the base 14 is formed on the side close to the ventilation hole 128.Since the outer peripheral wall of the mounting portion 141 is in close contact with the inner wall of the second cavity 12a, the airtightness of the one-way intake valve 10 can be achieved, preventing gas from leaking through the gap between the cover body 12 and the base 14, effectively preventing air leakage of the buffer airbag pad, and thus eliminating the need for frequent inflation, which is convenient to use. In addition, the third air outlet surface 144 can be in close contact with the inner wall of the second cavity 12a on the side of the second air outlet surface 124, further enhancing the airtightness of the one-way intake valve 10.

[0054] The flange portion 142 protrudes from the end of the mounting portion 141 away from the vent hole 128 and towards the inner wall of the first cavity 11a until it abuts against the inner wall of the first cavity 11a, forming the same outer diameter as the main body portion 122 of the cover body 12. When the mounting portion 141 is disposed in the second cavity 12a, the flange portion 142 abuts against the second intake surface 125 of the cover body 12 and is disposed flush with the main body portion 122 in the first cavity 11a so as to be in close contact with the inner wall of the first cavity 11a. Thus, the connection gap 150 between the flange portion 142 and the main body portion 122 of the cover body 12 is covered by the housing 11, thereby enhancing the airtightness of the one-way intake valve 10 and preventing air leakage. Since the housing 11 is elastic, when the one-way intake member 17 is inserted, the housing 11 can be deformed and expanded at the portion provided with the hook portion 117. Thus, when the one-way intake member 17 is snapped into the first cavity 11a, the hook portion 117 abuts and engages with the flange portion 142 of the base 14, further preventing gas from leaking through the connection gap 150 between the flange portion 142 and the main body portion 122 of the cover body 12, enhancing the airtightness of the one-way intake valve 10, and avoiding air leakage.

[0055] In this embodiment, as Figure 6 and Figure 7As shown, the second air inlet surface 125 abuts against the flange portion 142, and a gap at the contact between the second air inlet surface 125 and the flange portion 142 forms a connection gap 150. The side wall of the flange portion 142 and the side wall of the main body portion 122 are in the same plane. Thus, when the housing 11 elastically deforms, the connection gap 150 between the flange portion 142 and the main body portion 122 is abutted by the inner wall of the housing 11 to be airtight, thereby effectively preventing the gas inside the airbag from leaking through the connection gap 150. It should be noted that even if the contact portions between the cover body 12 and the base 14 are in close contact, the gap such as the connection gap 150 between them is theoretically airtight. However, due to factors such as the manufacturing tolerance and assembly of the components themselves, the non-airtightness of the gap between them is inevitable in actual production. Therefore, preferably, a sealing material (not shown in the figure), such as an organosilicon adhesive like silicone rubber adhesive, can also be provided on the outer periphery of the connection gap 150 or the one-way air inlet component 17. By using this sealing material, it is possible to further prevent the gas from leaking from the gap between the cover body 12 and the base 14, such as the connection gap 150 between the flange portion 142 and the main body portion 122 of the cover body 12, strengthen the airtightness of the one-way air inlet valve 10, and avoid air leakage.

[0056] In addition, the flange portion 142 is not limited to a configuration where it is not set to have the same outer diameter as the main body portion 122 of the cover body 12 and is flush with the main body portion 122. The flange portion 142 can also be configured such that its outer diameter increases, decreases, or varies randomly as it moves away from the main body portion 122, as long as the flange portion 142 closely abuts against the second air inlet surface 125 of the cover body 12. Moreover, preferably, the inner wall of the cavity 11a of the housing 11 closely abuts against the outer walls of the main body portion 122 of the cover body 12 and the flange portion 142 of the base 14 according to their shapes, so that the connection gap 150 is abutted by the inner wall of the housing 11 to be airtight. Thus, this way can also effectively prevent the gas inside the airbag from leaking through the connection gap 150.

[0057] In addition, the seat portion 143 extends outward from the end of the mounting portion 141 away from the ventilation hole 128 and forms the third air inlet surface 145 of the base 14. The outer diameter of the seat portion 143 only needs to be formed smaller than the outer diameter of the flange portion 142, and its shape is not particularly limited. The seat portion 143 is used to form the third air inlet surface 145 of the base 14 and the air inlet hole 149 in the third air inlet surface 145. However, the seat portion 143 can also function as a handle when mounting the base 14 on the cover body 12 and can also serve as a clamping portion of a jig. It can be understood, however, that this application can omit the seat portion 143 and directly form the third air inlet surface 145 at the end of the mounting portion 141 away from the ventilation hole 128.

[0058] In the above embodiment, the installation part 141 is installed in the second cavity 12a of the cover body 12, and the flange part 142 is flush with the main body part 122, so as to be in close contact with the first cavity 11a as a whole. However, the present application is not limited thereto. The flange part 142 can be omitted, and only the main body part 122 is in close contact with the first cavity 11a. Compared with the example of the above embodiment, the airtightness may be deteriorated, but the steps of forming the flange part 142 can be reduced, the molding structure is simple, and it is easy to manufacture. In addition, the flange of the cover body 12 can be provided instead of the flange part 142 of the base 14. In this case, the flange is provided on the side of the main body part 122 close to the second air outlet surface 124. By making the flange flush with the installation part 141, it is in close contact with the first cavity 11a as a whole. At this time, the main body part 122 is arranged in the third cavity 14a and is in close contact with the third cavity 14a, and the ball 13 is received in the third cavity 14a.

[0059] As follows, the principle of realizing unidirectional intake air by the unidirectional intake valve 10 of the present application is described.

[0060] When the first airbag 2 returns from the compressed state to the natural state by the internally provided elastomer 21, for example, gas entering from the outside is generated under the pressure difference. The ball 13 is driven by the gas to the side of the ventilation hole 128 and does not block the ventilation hole 128, so that the ball 13 does not come out of the ventilation hole 128. The gas entering from the outside sequentially passes through the intake hole 149, the third cavity 14a and the opening 148, and the ventilation hole 128 and continues to enter the air outlet hole 118 and the first airbag 2, realizing the intake air of the unidirectional intake valve 10. When the first airbag 2 is pressed, the gas originally intended to flow to the outside drives the ball 13 to one side of the intake hole 149 and blocks the intake hole 149, so that the gas originally intended to flow to the outside cannot leak. The unidirectional intake of gas is realized.

[0061] Furthermore, when the gas originally intended to flow to the outside cannot leak, a pressure difference is generated on both sides of the unidirectional intake member. Under the pressure difference, the unidirectional intake member opens, so that the gas in the first airbag 2 enters the second airbag 4 through the unidirectional intake member. By repeatedly pressing and releasing the first airbag 2, the inflation of multiple airbags 205 of the buffer airbag pad 200 can be realized.

[0062] The steps of installing the one-way intake valve 10 on the main body 201 are described as follows. First, with the first intake surface 115 facing the outside of the buffer airbag pad 200, the housing 11 is adhered to one of the upper pad body 207 and the lower pad body 209 by means of glue or high-frequency wave, etc. Then, with the third intake surface 145 facing the outside, the one-way intake component 17 with the ball 13 built therein is inserted into the first cavity 11a of the housing 11. Next, the upper pad body 207 and the lower pad body 209 are adhered in a manner that sandwiches the one-way intake valve 10, thereby forming the one-way intake valve 10 and the buffer airbag pad 200 provided with the one-way intake valve 10.

[0063] In addition, the above-mentioned adhesion using high-frequency wave is based on the principle that the material of the inner wall of the upper pad body 207 or the lower pad body 209 (for example, a plastic material containing PVC, TPU, EVA, etc.) and the material of the housing 11 (for example, a plastic, plastic, etc. containing PVC, TPU, EVA, etc.) are of the same material and can be melted and welded to each other under high-frequency wave, so as to adhere the intake valve 10 to the buffer airbag pad 200. The overflow of the sol generated by high-frequency welding is likely to occur in the above process. In addition, in the subsequent process, sometimes in order to prevent the gas in the buffer airbag pad 200 from leaking to the outside from the outer peripheral wall of the intake valve 10, an organosilicon adhesive such as silicone rubber adhesive is coated on the outer periphery of the intake valve 10, which becomes one of the factors for glue overflow.

[0064] As described above, the above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A one-way intake valve is provided at the intake port of a buffer airbag pad having a plurality of airbags. The one-way intake valve is characterized by comprising: A housing fixed to the air inlet of the buffer airbag pad. A first cavity is provided inside the housing, and the first cavity communicates with the air inlet of the buffer airbag pad and a plurality of airbags of the buffer airbag pad; and A one-way air intake component clamped in the first cavity of the housing and including a ball. The one-way air intake component can unidirectionally introduce external gas into the airbag of the buffer airbag pad through the movement of the ball, and prevent the gas in the airbag of the buffer airbag pad from leaking to the outside. The ball does not contact the housing.

2. The one-way intake valve according to claim 1, characterized in that The one-way air intake component further includes a cover body and a base. The ball is received in the base and can move between the cover body and the base to achieve one-way air intake. The cover body and the base are clamped together, and a connection gap is formed at the connection between the cover body and the base. In a state where the one-way air intake component is installed in the housing, the connection gap is abutted by the inner wall of the housing to be airtight.

3. The one-way intake valve according to claim 2, characterized in that The cover body has a main body portion tightly disposed in the first cavity and has a second cavity inside. The base has an installation portion tightly disposed in the second cavity and has a third cavity inside. The ball is movably disposed in the third cavity.

4. The one-way intake valve according to claim 3, characterized in that The housing has a first air intake surface and a first air outlet surface disposed opposite to each other. The first cavity is formed by being recessed from the first air intake surface toward the first air outlet surface, and the first air intake surface is penetrated. An air outlet hole is penetratedly opened on the first air outlet surface. The cover body has a second air intake surface and a second air outlet surface disposed opposite to each other. The second cavity is formed by being recessed from the second air intake surface toward the second air outlet surface, and the second air intake surface is penetrated. A ventilation hole is penetratedly opened on the second air outlet surface. The base has a third air intake surface and a third air outlet surface disposed opposite to each other. The third cavity is formed by being recessed from the third air outlet surface toward the third air intake surface, and the third air outlet surface is penetrated. An air inlet hole is penetratedly opened on the third air intake surface. Gas from the outside sequentially enters the airbag of the buffer airbag pad through the air inlet hole, the ventilation hole, and the air outlet hole.

5. The one-way intake valve according to claim 4, characterized in that The air inlet hole has a shape that prevents the ball from passing through and is matched with the ball. The ventilation hole has a shape that prevents the ball from passing through and is not matched with the ball. Thus, when the ball rolls to the air inlet hole, the air inlet hole is blocked, and when the ball rolls to the ventilation hole, the gas passes through the ventilation hole.

6. The one-way intake valve according to claim 3, characterized in that The first cavity penetrates the first air intake surface on the side of the housing facing the outside of the buffer airbag pad, and a guiding surface is formed on the first air intake surface. The cover body has a second air intake surface and a second air outlet surface disposed opposite to each other. The second cavity is formed by being recessed from the second air intake surface toward the second air outlet surface, and the second air intake surface is penetrated. The cover body further has a narrow portion that extends in a direction narrowing away from the outside of the buffer airbag pad from the main body portion. The end surface of the narrow portion on the side away from the main body portion is the second air outlet surface. The shape of the guiding surface is matched with the shape of the narrow portion.

7. The one-way intake valve according to claim 3, characterized in that The base further has a flange portion, which is provided at an end of the mounting portion close to the outer side of the buffer airbag pad and is disposed in the first cavity in close contact with the main body portion. A gap between the flange portion and the main body portion forms the connection gap, and the inner wall of the first cavity of the housing covers the connection gap and is in close contact with the flange portion and the main body portion.

8. The one-way intake valve according to claim 7, characterized in that The housing is elastic, and due to the elastic deformation of the housing, the flange portion and the main body portion are in close contact with the inner wall of the first cavity.

9. The one-way intake valve according to claim 4, characterized in that The third air outlet surface is in close contact with the inner wall of the second cavity of the cover body. The opening formed at the third air outlet surface of the third cavity is the largest, and as it approaches the air inlet hole, the third cavity gradually narrows. When the ball in the third cavity rolls under the push of the airflow towards the air inlet hole, the inner wall of the third cavity guides the ball to move along the narrowing direction of the third cavity, so as to quickly block the air inlet hole and prevent the gas from leaking to the outside of the buffer airbag pad.

10. A buffer airbag pad, characterized in that Comprising: A plurality of airbags, including: a first airbag having an air inlet communicating with the outside and communicating with other airbags; A plurality of air channels connecting and communicating the plurality of airbags; and A one-way intake valve provided at the air inlet. The one-way intake valve includes: A housing fixed to the air inlet of the buffer airbag pad, with a first cavity disposed inside the housing, and the first cavity communicates with the air inlet of the buffer airbag pad and a plurality of airbags of the buffer airbag pad; and A one-way intake component engaged in the first cavity of the housing and including a ball. The one-way intake component can unidirectionally introduce external gas into the airbag of the buffer airbag pad through the movement of the ball, and prevent the gas in the airbag of the buffer airbag pad from leaking to the outside. The ball does not contact the housing.

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