Switch valve and cushion

Abstract

The utility model relates to the technical field of valves, in particular to a switch valve and a cushion. The switch valve comprises a valve body, a sealing gasket and a valve plug, an interlayer arranged in the radial direction is arranged in a cavity in the valve body, the cavity is divided into a first cavity and a second cavity in the vertical direction, a passage hole penetrating through the interlayer is formed in the interlayer, internal threads are arranged on the wall of the first cavity, and a gasket supporting part is arranged at the lower end of the second cavity. And a plurality of communicating holes are formed in the pad supporting part. The sealing gasket is arranged in the second cavity, when the sealing gasket is subjected to upward pressure, the sealing gasket can abut against the partition layer and cover the through hole, in the natural state or when the sealing gasket is subjected to downward pressure, the sealing gasket falls on the gasket supporting part, and at least part of the communicating hole is not covered by the sealing gasket. The valve plug is in threaded fit with the first cavity, and the lower end of the valve plug abuts against the interlayer and covers the passage hole. The switch valve is simple in structure, few in parts and convenient to assemble and use, and a better sealing effect can be achieved by providing multiple seals.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a switch valve and a seat cushion. Background Art

[0002] Due to the comfort of inflatable / liquid products (such as seat cushions, pillows, back cushions, mattresses, etc.), they are recognized by more and more people, but there are still some problems that need to be solved. For example, the problem of easy leakage of gas or liquid in the product. Taking the seat cushion as an example, the inflated seat cushion will cause insufficient support due to leakage, so it needs to be inflated frequently, affecting the user experience. The seat cushion filled with liquid will cause insufficient support due to leakage, and will contaminate and wet the user's pants. Whether it is air leakage or liquid leakage, the reason is that the sealing effect of the switch valve (inflatable / liquid valve) used is poor.

[0003] In order to solve the above problems, the applicant's first application for a Chinese patent application with the publication number CN220354569U and the name of a switch valve, an inflatable / liquid cushion and an inflatable / liquid joint, proposed a switch valve scheme. The switch valve includes a valve body, a valve core and a button. A partition is provided in the valve body, and the partition divides the cavity into a first cavity and a second cavity in the vertical direction. The partition is provided with a central hole for the air / liquid supply hole. The button is arranged in the first cavity. The button has a hollow connecting column and a reset spring. The valve stem of the valve core passes through the central hole and is connected to the hollow connecting column. The sealing gasket is located on the upper side of the base of the valve core. The sealing gasket is connected to the valve core through a fixing member. Under the action of the spring, the switch valve can be switched by moving the button downward. During the whole process, the sealing gasket, the valve core and the button move synchronously, which can ensure that the switch valve has good sealing when sealing is required. Compared with the previous products on the market, although it has improved the sealing performance to a certain extent and the structure is also simple, it still uses relatively more accessories and requires a relatively large cost for production and manufacturing. The complex structure will reduce the stability of component assembly performance. In addition, the limitation of spring elastic force will reduce the sealing performance of the switch valve to a certain extent. When the internal pressure of the inflatable / liquid product is too high and exceeds the pressure of the spring on the sealing gasket, the contents will seep out and leak. Utility Model Content

[0004] The utility model aims to provide a switch valve with simpler structure and better sealing performance and a seat cushion adopting the switch valve.

[0005] In order to achieve the above-mentioned object, in a first aspect, the utility model provides a switch valve. In a first embodiment thereof, the switch valve comprises:

[0006] The valve body has a cavity with a circular cross section inside, a partition arranged radially in the cavity, and the cavity is divided into a first cavity and a second cavity in the up and down direction, a passage hole penetrating the partition is provided on the partition, an internal thread is provided on the wall of the first cavity, a pad support portion is provided at the lower end of the second cavity, and a plurality of communication holes are provided on the pad support portion;

[0007] a sealing gasket, disposed in the second cavity, wherein the diameter of the sealing gasket is larger than the diameter of the passage hole and smaller than the radial dimension of the gasket support portion, and the axial dimension of the sealing gasket is smaller than the axial dimension of the second cavity, and when the sealing gasket is subjected to upward pressure, it can abut against the barrier layer and cover the passage hole, and in a natural state or when the sealing gasket is subjected to downward pressure, the sealing gasket falls on the gasket support portion, and at least a part of the communication hole is not covered by the sealing gasket, so that the second cavity is connected to the space at the lower end of the second cavity; and

[0008] The valve plug is columnar, and an outer side of the valve plug is provided with an outer thread matching the inner thread. The valve plug is threadedly matched with the first cavity, and the lower end of the valve plug is against the partition layer and covers the passage hole.

[0009] In combination with the first implementation of the first aspect, in a second implementation of the first aspect of the utility model, the pad support portion is composed of a plurality of radial protruding teeth extending from the side wall of the second cavity along the radial center, the plurality of radial protruding teeth are spaced apart in the circumferential direction, and the interval between two adjacent radial protruding teeth is a connecting hole; or

[0010] The pad support part is a plate structure, the communication hole penetrates the plate structure along the axial direction of the valve body, and the plurality of communication holes are evenly distributed around the central axis of the passage hole.

[0011] In combination with the first or second implementation of the first aspect, in a third implementation of the first aspect of the utility model, a groove is provided at the upper end of the valve plug, and a rotating beam is provided in the groove to divide the groove into two parts.

[0012] In combination with any one of the first to third implementations of the first aspect, in a fourth implementation of the first aspect of the utility model, the main body of the valve plug is a tubular structure with two ends open, a partition is radially arranged inside the tubular structure, the partition has a sunken portion, the bottom outer side of the sunken portion is a straight structure, and the bottom size of the sunken portion is larger than the diameter of the passage hole, and can cover the passage hole, and a radial spacing is provided between the side wall of the sunken portion and the inner wall of the tubular structure, and when the bottom of the sunken portion abuts against the passage hole and covers the passage hole, the lower end of the tubular structure abuts against the partition;

[0013] A beam plate perpendicular to the bottom of the sinking concave portion is arranged inside the sinking concave portion as a rotating beam.

[0014] In combination with the fourth implementation method of the first aspect, in the fifth implementation method of the first aspect of the utility model, two circles of annular walls are arranged in the first cavity and on the partition, and the two circles of annular walls are coaxially arranged with the passage hole. When the lower end of the tubular structure abuts on the partition, the annular wall of the inner circle can be inserted into the radial interval, and the upper end of the annular wall of the inner circle abuts against the inner wall of the tubular structure and / or the outer side of the annular wall of the inner circle abuts against the partition, and the annular wall of the outer circle abuts against the outer wall of the tubular structure.

[0015] In combination with the fifth implementation of the first aspect, in a sixth implementation of the first aspect of the utility model, the annular wall of the inner ring is inclined outward from bottom to top; and / or

[0016] A guiding inclined surface is arranged on the outer side of the upper end of the annular wall of the inner ring.

[0017] Based on any of the above implementations, optionally, the internal thread is a three-thread thread.

[0018] Based on any of the above embodiments, optionally, an extended mounting portion is provided on the outer peripheral side of the valve body; and / or

[0019] The upper end of the valve plug is flush with or lower than the upper end of the valve body.

[0020] Based on any of the above embodiments, optionally, the outer side of the valve body is provided with an external thread;

[0021] The switch valve also includes a valve cover, which is threadedly connected to the valve body through an external thread on the outer side of the valve body.

[0022] In a second aspect, the present invention further provides a seat cushion, comprising a switch valve according to any implementation of the first aspect; and

[0023] The cushion body has a receiving cavity for receiving gas or liquid filling.

[0024] The above technical solution of the utility model has the following advantages:

[0025] The switch valve provided by the utility model includes a valve body, a sealing gasket and a valve plug. The valve body has a cavity with a circular cross section. A radially arranged partition is provided in the cavity to separate the cavity into a first cavity and a second cavity in the up and down direction. A passage hole penetrating the partition is provided on the partition. An internal thread is provided on the wall of the first cavity. A pad support portion is provided at the lower end of the second cavity. A plurality of connecting holes are provided on the pad support portion. The sealing gasket is arranged in the second cavity. When the sealing gasket is subjected to upward pressure, it can abut against the partition and cover the passage hole. In a natural state or when the sealing gasket is subjected to downward pressure, the sealing gasket falls on the pad support portion, and at least part of the connecting hole is not covered by the sealing gasket, so that the second cavity is connected to the space at the lower end of the second cavity. An external thread matching the internal thread is provided on the outer side of the valve plug. The valve plug is threaded with the first cavity, and the lower end abuts against the partition and covers the passage hole. The switch valve has a simple structure, few parts, and is easy to assemble and use. It provides multiple seals through the threaded connection seal between the valve plug and the valve body, and the double seal of the valve plug and the sealing gasket on both sides of the barrier to achieve a better sealing effect.

[0026] The seat cushion of this embodiment adopts the above-mentioned switch valve, which has good sealing performance and is convenient for filling, exhausting and liquid filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings of the present invention are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not necessarily be consistent with the actual product.

[0028] Figure 1 This is a schematic diagram of the exploded structure of a switch valve in the first embodiment of the utility model;

[0029] Figure 2 This is a schematic structural diagram of a valve body in Embodiment 1 of the present utility model;

[0030] Figure 3 yes Figure 2 A schematic diagram of the structure of the middle valve body from another angle;

[0031] Figure 4 yes Figure 2 Schematic diagram of the half-section structure of the middle valve body;

[0032] Figure 5 This is a schematic diagram of a half-section structure of a valve plug in the first embodiment of the utility model;

[0033] Figure 6 yes Figure 1 A half-section structural diagram of the switch valve combination state;

[0034] Figure 7 This is a schematic diagram of the exploded structure of another switch valve in the first embodiment of the utility model;

[0035] Figure 8 yes Figure 7 A half-section structural diagram of the switch valve combination state;

[0036] Fig. 9 A structural schematic diagram of a seat cushion in Embodiment 2 of the present utility model;

[0037] Fig.10 yes Fig. 9 A schematic cross-sectional view of the middle seat cushion through the center of the switch valve;

[0038] Fig.11 yes Fig.10 A magnified schematic diagram of part A;

[0039] Fig.12 This is a schematic diagram of the seat cushion in the second embodiment of the present utility model in the state of filling liquid;

[0040] Fig.13 yes Fig.13 An enlarged schematic diagram of part B.

[0041] In the figure:

[0042] 100: switch valve;

[0043] 110: valve body;

[0044] 111: compartment;

[0045] 1111: via hole;

[0046] 112: first cavity;

[0047] 1121: internal thread;

[0048] 1122: annular wall;

[0049] 113: second cavity;

[0050] 114: pad support portion;

[0051] 115: extension installation part;

[0052] 120: Sealing gasket;

[0053] 130: valve plug;

[0054] 131: Rotating beam;

[0055] 132: partition;

[0056] 1321: sinking depression;

[0057] 140: Valve cover;

[0058] 200: seat cushion body;

[0059] 300: pressure inside the pad;

[0060] 400: Gas / liquid containers;

[0061] 500: Gas / liquid path. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0066] Embodiment 1

[0067] like Figure 1 to Figure 6 As shown, the switch valve 100 provided in the embodiment of the utility model includes a valve body 110 , a sealing gasket 120 and a valve plug 130 .

[0068] See also Figure 2 to Figure 4As shown, the valve body 110 has a cavity with a circular cross section inside, and a radially arranged partition 111 is provided in the cavity to separate the cavity into a first cavity 112 and a second cavity 113 in the vertical direction, and a passage hole 1111 penetrating the partition 111 is provided on the partition 111, which is used to connect the first cavity 112 and the second cavity 113. An internal thread 1121 is provided on the wall of the first cavity 112, and a pad support portion 114 is provided at the lower end of the second cavity 113, and a plurality of communication holes 1141 are provided on the pad support portion 114.

[0069] See also Figure 1 and Figure 6 As shown, the sealing gasket 120 is arranged in the second cavity 113, and the axial dimension of the sealing gasket 120 is smaller than the axial dimension of the second cavity 113, that is, the sealing gasket 120 has an axial movable space in the second cavity 113. The diameter of the sealing gasket 120 is larger than the diameter of the passage hole 1111 and smaller than the radial dimension of the pad support portion 114. When sealing is required, the sealing gasket 120 can seal the passage hole 1111. When the sealing gasket 120 is located on the pad support portion 114, at least a part of the communication hole 1141 will not be blocked by the sealing gasket 120, so that the second cavity 113 and the space at the lower end of the second cavity 113 remain connected. The axial dimension of the sealing gasket 120 is smaller than the axial dimension of the second cavity 113, that is, the sealing gasket 120 has an axial movable space in the second cavity 113. When the sealing gasket 120 is subjected to upward pressure, it can rest on the partition 111 and cover the passage hole 1111 (see Fig.10 and Fig.11 In the natural state or when the sealing gasket 120 is subjected to downward pressure, the sealing gasket 120 falls on the pad support portion 114 (see Figure 6 , Fig.12 and Fig.13 The pad support portion 114 is mainly used to confine the sealing pad 120 within the space of the second cavity 113 .

[0070] See also Figure 1 , Figure 5 and Figure 6 As shown, the main body of the valve plug 130 is columnar, and it matches the first cavity 112. The outer side of the valve plug 130 is provided with an external thread that matches the internal thread 1121. The valve plug 130 is threadedly matched with the first cavity 112, and the lower end of the valve plug 130 is against the partition 111 and covers the passage hole 1111. When the switch valve 100 needs to be closed, the passage hole 1111 is sealed from the first cavity 112. When it is necessary to perform an inflation / liquid operation, the valve plug 130 is rotated to remove the valve plug 130 from the first cavity 112 to perform an inflation / liquid operation. When it is necessary to enter an exhaust / liquid operation, after removing the valve plug 130, the sealing gasket 120 is pushed downward from the passage hole 1111 to perform an exhaust / liquid operation.

[0071] The switch valve in this embodiment has a simple structure, few parts, and is easy to assemble and use. The threaded connection seal between the valve plug 130 and the valve body 110, as well as the double seal of the valve plug 130 and the sealing gasket 120 on both sides of the barrier layer provide multiple seals to achieve a better sealing effect.

[0072] See also Figure 3 and Figure 4 As shown, in one example, the lower end of the second cavity 113 can be understood as an open end, and the pad support portion 114 is a plurality of radial protruding teeth extending from the side wall of the open end to the center, and the plurality of radial protruding teeth are spaced apart in the circumferential direction. The diameter of the sealing gasket 120 is smaller than the diameter of the open end, so that when the sealing gasket 120 falls on the pad support portion 114, it will not completely cover the intervals between the radial protruding teeth, so that the second cavity 113 is connected to the space located at the lower end of the second cavity 113. Of course, the above is only an example of a structure. In other examples, the lower end of the second cavity 113 can be understood as a closed end, that is, the end has an end plate, and a plurality of connecting holes 1141 are opened on the end plate of the closed end, and the plurality of connecting holes 1141 are evenly distributed around the central axis of the passage hole 1111. When the sealing gasket 120 falls on the gasket support portion 114 , the communicating hole 1141 is located outside the sealing gasket 120 (the sealing gasket 120 does not block the communicating hole), or only blocks part of the communicating hole 1141 or a portion of the communicating hole 1141 .

[0073] In order to facilitate installation or removal of the valve plug 130, in one example, a groove is provided at the upper end of the valve plug 130, and a rotating beam 131 is provided in the groove to divide the groove into two parts. When in use, the operator can rotate the valve plug 130 by holding the rotating beam 131 by hand, thereby achieving installation or removal of the valve plug 130. In this embodiment, the valve plug 130 can be a solid cylinder or a hollow structure, as long as its lower end can block the passage hole 1111.

[0074] In another example, see Figure 5 and Figure 6As shown, the main body of the valve plug 130 is a tubular structure with both ends open, and a partition 132 is arranged radially inside the tubular structure. The partition 132 has a sunken recess 1321. For example, the cross section of the partition 132 is in the shape of an inverted "J". The bottom outer side of the sunken recess 1321 is a straight structure, and the bottom size of the sunken recess 1321 is larger than the diameter of the passage hole 1111, and can cover the passage hole 1111. There is a radial gap between the side wall of the sunken recess 1321 and the inner wall of the tubular structure. When the bottom of the sunken recess 1321 abuts against the passage hole 1111 and covers the passage hole 1111, the lower end of the tubular structure abuts against the partition 111. A beam plate perpendicular to the bottom of the sunken recess 1321 is provided inside the sunken recess 1321 as a rotating beam 131. On the basis of this example, in order to further improve the sealing effect of the switch valve 100 during the process of injecting gas / liquid fillers and during use, in one embodiment, two circles of annular walls 1122 are arranged in the first cavity 112 and above the partition 111. The two circles of annular walls 1122 are coaxially arranged with the passage hole 1111. When the lower end of the tubular structure abuts against the partition 111, the inner circle of the annular wall 1122 can be inserted into the radial interval, and the upper end of the inner circle of the annular wall 1122 abuts against the inner wall of the tubular structure and / or the outer side of the inner circle of the annular wall 1122 abuts against the partition 132, providing another layer of sealing. The outer circle of the annular wall 1122 abuts against the outer wall of the tubular structure, providing another layer of sealing. During the process of injecting gas / liquid fillers, see Fig.12 and Fig.13 As shown, a common mineral water bottle on the market is used as an example of a gas / liquid container 400 for explanation, and the inner thread 1121 is a thread structure matching the thread of the mineral water bottle. When injecting gas / liquid, the mouth of the mineral water bottle is inserted between the two circles of annular walls 1122, the inner circle of the annular wall 1122 can be inserted into the mineral water bottle and pressed against the inner wall of the mouth of the mineral water bottle, and the outer circle of the annular wall 1122 presses against the outer wall of the mouth of the mineral water bottle, achieving multiple sealing to avoid water spraying outward or obvious gas leakage.

[0075] In one example, the height of the annular wall 1122 located in the inner circle is higher than that of the annular wall 1122 located in the outer circle.

[0076] In one embodiment, the inner ring annular wall 1122 is inclined outward from bottom to top, which can better abut and improve the sealing effect. In order to facilitate the insertion of the inner ring annular wall 1122, preferably, the outer side of the upper end of the inner ring annular wall 1122 is provided with a guiding inclined surface, such as a chamfered guiding structure.

[0077] In order to facilitate the gas / liquid filling operation and realize universal matching of common mineral water bottles in life, in one example, the internal thread 1121 adopts a three-thread thread (the thread adopted by most mineral water bottles on the market). During the gas / liquid filling operation, a mineral water bottle can be directly used as a container for the gas / liquid source.

[0078] To facilitate the installation of the switch valve 100, in some embodiments, see Figure 1 , Fig.11 and Fig.13 As shown, an extended mounting portion 115 is provided on the outer peripheral side of the valve body 110 to facilitate sealing connection with the seat cushion body 200 .

[0079] On the basis of any of the above examples, in order to improve the protection of the valve plug 130 , the upper end of the valve plug 130 is flush with or lower than the upper end of the valve body 110 .

[0080] To further improve the sealing effect, see Figure 7 and Figure 8 As shown, the outer side of the valve body 110 is provided with an external thread. The switch valve 100 further includes a valve cover 140, which is threadedly connected to the valve body 110 through the external thread on the outer side of the valve body 110. The valve cover 140 is an outer decorative accessory of the switch valve. On the basis of improving the sealing performance, it can also protect the valve body 110 and prevent the misoperation of the valve plug 130. In one example, the valve cover 140 is made of ABS plastic.

[0081] In one example, the valve body 110 is made of polyether TPU material and has slight elasticity.

[0082] In one example, the sealing gasket 120 is a soft sealing gasket made of silicone, at least one side of which is a smooth surface.

[0083] In one example, the valve plug 130 is made of ABS, PP, PE or nylon.

[0084] Embodiment 2

[0085] like Figures 9 to 13 As shown, the second embodiment provides a seat cushion, which can use any switch valve 100 in the first embodiment, and the switch valve 100 is installed on the seat cushion body 200. The seat cushion body 200 has a receiving cavity for receiving gas or liquid filling.

[0086] See also Fig.10 and Fig.11 As shown, when the seat cushion is in use (no need to inflate), the pressure 300 inside the cushion will act on the lower side of the sealing cushion 120, causing the sealing cushion 120 to press upward against the lower side of the partition 111, providing a seal for the passage hole 1111 and further improving the sealing effect.

[0087] See also Fig.12 and Fig.13As shown, when gas / liquid injection is required, the gas / liquid container 400 is connected and fixed to the valve body 110, and pressure is provided (e.g., squeezed) for the gas / liquid in the gas / liquid container 400, and the gas / liquid in the gas / liquid container 400 enters the switch valve 100, and the gas / liquid pressure acts on the upper side of the sealing pad 120, so that the sealing pad 120 is separated from the interlayer 111, so that the gas / liquid inlet path is unblocked, and the gas / liquid enters the cushion body 200 through the switch valve 100. Fig.13 The middle gas / liquid path 500 is a schematic diagram of the gas / liquid inlet path. When the gas / liquid inside the cushion body 200 is close to saturation, it will begin to press the sealing pad 120 outward to form a one-way flow function that only allows inflow but not outflow. At this time, the valve plug 130 can be installed. When it is necessary to enter the exhaust / liquid operation, the valve plug 130 is removed and the sealing pad 120 is pushed downward from the passage hole 1111 to perform the exhaust / liquid operation.

[0088] The seat cushion of this embodiment adopts the switch valve in the first embodiment, which has good sealing performance and is convenient for filling and exhausting air.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that not every embodiment contains only one independent technical solution. In the absence of a conflict of solutions, the various technical features mentioned in each embodiment can be combined in any way to form other implementation methods that can be understood by those skilled in the art.

[0090] In addition, without departing from the scope of the present invention, the technical solutions described in the aforementioned embodiments may be modified, or some of the technical features may be replaced by equivalents, without causing the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A switch valve, It is characterized in that include: A valve body, wherein the interior of the valve body has a cavity with a circular cross section, wherein a partition arranged in a radial direction is provided in the cavity, and the cavity is divided into a first cavity and a second cavity in the vertical direction, wherein the partition is provided with a passage hole penetrating the partition, wherein an internal thread is provided on the wall of the first cavity, and a pad support portion is provided at the lower end of the second cavity, wherein the pad support portion is provided with a plurality of communication holes; a sealing gasket, arranged in the second cavity, wherein the diameter of the sealing gasket is larger than the diameter of the passage hole and smaller than the radial dimension of the gasket support portion, and the axial dimension of the sealing gasket is smaller than the axial dimension of the second cavity, and when the sealing gasket is subjected to upward pressure, it can be pressed against the barrier layer and cover the passage hole, and in a natural state or when the sealing gasket is subjected to downward pressure, the sealing gasket falls on the gasket support portion, and at least part of the communication hole is not covered by the sealing gasket, so that the second cavity is connected to the space at the lower end of the second cavity; and The valve plug is columnar, and an outer side of the valve plug is provided with an outer thread matching the inner thread. The valve plug is threadably matched with the first cavity, and the lower end of the valve plug abuts against the partition layer and covers the passage hole.

2. The on-off valve according to claim 1, Features: The pad support portion is composed of a plurality of radial protruding teeth extending from the side wall of the second cavity along the radial center, the plurality of radial protruding teeth are spaced apart in the circumferential direction, and the interval between two adjacent radial protruding teeth is a connecting hole; or The pad support portion is a plate structure, the communication hole penetrates the plate structure along the axial direction of the valve body, and a plurality of the communication holes are evenly distributed around the central axis of the passage hole.

3. The on-off valve according to claim 1, Features: A groove is arranged at the upper end of the valve plug, and a rotating beam is arranged in the groove to divide the groove into two parts.

4. The on-off valve according to claim 1, Features: The main body of the valve plug is a tubular structure with two ends open, a partition is arranged radially inside the tubular structure, the partition has a sunken portion, the bottom outer side of the sunken portion is a straight structure, and the bottom size of the sunken portion is larger than the diameter of the passage hole, and can cover the passage hole, and there is a radial interval between the side wall of the sunken portion and the inner wall of the tubular structure, when the bottom of the sunken portion abuts against the passage hole and covers the passage hole, the lower end of the tubular structure abuts against the partition; A beam plate perpendicular to the bottom of the sinking recess is provided inside the sinking recess as a rotating beam.

5. The on-off valve according to claim 4, Features: Two circles of annular walls are arranged in the first cavity and on the partition, and the two circles of annular walls are coaxially arranged with the passage hole. When the lower end of the tubular structure abuts against the partition, the annular wall of the inner circle can be inserted into the radial interval, and the upper end of the annular wall of the inner circle abuts against the inner wall of the tubular structure and / or the outer side of the annular wall of the inner circle abuts against the partition, and the annular wall of the outer circle abuts against the outer wall of the tubular structure.

6. The on-off valve according to claim 5, Features: The annular wall of the inner ring is inclined outward from bottom to top; and / or A guiding inclined surface is arranged on the outer side of the upper end of the annular wall of the inner ring.

7. The on-off valve according to claim 5, Features: The internal thread is a three-thread thread.

8. The on-off valve according to claim 1, Features: An extended mounting portion is provided on the outer peripheral side of the valve body; and / or The upper end of the valve plug is flush with or lower than the upper end of the valve body.

9. The on-off valve according to any one of claims 1 to 8, Features: The outer side of the valve body is provided with an external thread; The switch valve further comprises a valve cover, and the valve cover is threadedly connected to the valve body via an external thread on the outer side of the valve body.

10. A cushion, Features: comprising the switch valve according to any one of claims 1 to 9; and The cushion body has a receiving cavity for receiving gas or liquid filling.

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