Switch valve and cushion

Abstract

The utility model relates to the technical field of cushions, in particular to a switch valve and a cushion. The switch valve comprises a valve body, a valve core, a button and a valve cover, an interlayer is arranged in the valve body, the interlayer divides a cavity into a first cavity and a second cavity in the vertical direction, a center hole and a passage hole are formed in the interlayer, internal threads are arranged on the wall of the first cavity, the valve cover is in threaded connection with the valve body through the internal threads of the first cavity, the button is arranged in the first cavity, and the valve core is arranged in the second cavity. The button is provided with a hollow connecting column and a reset spring, a valve rod of the valve element penetrates through the center hole and then is connected with the hollow connecting column, the sealing gasket is located on the upper side of a base of the valve element, the sealing gasket is connected with the valve element through the fixing piece, and under the action of the spring, opening and closing of the switch valve can be achieved by moving the button downwards. The sealing gasket, the valve element and the button move synchronously, and the use process and the gas / liquid injection process of the switch valve can be guaranteed. The seat cushion adopts the switching valve and is good in sealing performance.

Description

Technical Field

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

[0002] Due to the comfort of inflatable / liquid cushions, they are recognized by more and more people. However, there are still some problems that need to be solved. For example, the problem of gas or liquid leakage in the cushion. The inflated cushion will cause insufficient support due to leakage, so it needs to be inflated frequently, affecting the user experience. The liquid-filled cushion 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 used is poor.

[0003] At present, the switch valve used in the cushion with air / liquid inflation function includes a valve body and a valve core. The valve core is composed of a hollow cylinder and a base fixed at one end of the hollow cylinder. The base is provided with a coaxial hole connected to the hollow cylinder. The sealing gasket is composed of a connecting cylinder and a gasket. The connecting cylinder and the gasket are an integral structure. The connecting cylinder passes through and extends out of the hollow cylinder. The gasket is located on the lower side of the base. The connecting cylinder extending out of the hollow cylinder is bonded to the button. A spring is sleeved on the outer side of the hollow cylinder to provide power for the button to reset. When inflating / liquid, the button is pressed down to separate the gasket from the base so that the gas / liquid can enter. After the inflation / liquid is completed, the button drives the sealing gasket to reset under the action of the spring to achieve sealing. The main reason for the poor sealing effect of the switch valve is that the gasket is located on the lower side of the valve core, and the linkage with the valve core is poor, which easily leads to poor sealing. In addition, the connecting cylinder and the button are easily separated, which is also very likely to cause poor sealing. Utility Model Content

[0004] The utility model aims to provide a switch valve with good sealing performance and a seat cushion comprising the switch valve.

[0005] In order to achieve the above objectives, in a first aspect, the utility model provides a switch valve, comprising:

[0006] The valve body has a cavity with a circular cross section inside, and a partition arranged radially is provided in the cavity to divide the cavity into a first cavity and a second cavity in the up and down direction. A center hole penetrating the partition is provided at the center of the partition, and passage holes penetrating the partition are provided around the center hole. An internal thread is provided on the wall of the first cavity;

[0007] The valve cover has a connecting section, which is a hollow cylinder, and the outer side of the hollow cylinder is provided with an external thread matching the internal thread, and the valve cover is connected to the valve body through threads;

[0008] The valve core is arranged in the cavity, and includes a valve stem and a base. The base is connected to one end of the valve stem. The valve stem is provided with a fixing piece. The fixing piece is spaced apart from the base in the axial direction of the valve stem. A sealing gasket is also sleeved on the valve stem. The sealing gasket is located between the fixing piece and the base, and the radial size of the sealing gasket is larger than the fixing piece; and

[0009] The button is arranged in the cavity, and includes a pressing plate and a hollow connecting column arranged on the lower side of the pressing plate, the lower end of the hollow connecting column extends into the central hole, the other end of the valve stem extends into the hollow connecting column and is connected to the button, a spring is sleeved on the outer side of the hollow connecting column, one end of the spring abuts against the pressing plate, and the other end abuts against the partition;

[0010] The base presses the sealing gasket against the valve body;

[0011] When the button is subjected to downward pressure, it moves downward to compress the spring, the valve core moves downward with the button, and the sealing gasket moves downward with the valve core to form a gap with the partition.

[0012] Optionally, a plurality of limiting notches are provided at intervals along the circumferential direction at the lower end of the valve body, and a protrusion is formed between two adjacent limiting notches;

[0013] The outer peripheral side of the base is provided with limiting teeth matching with the limiting notches;

[0014] In the sealed state, the limiting tooth is clamped in the limiting notch. By pressing the button downward, the limiting tooth can be separated from the limiting notch. By rotating the button, the limiting tooth is pressed against the lower end of the protrusion under the action of the spring.

[0015] Optionally, at least at the lower ends of two protrusions located on both sides of one of the limiting notches, angle limiting blocks are provided to limit the rotation angle of the limiting tooth.

[0016] Optionally, the inner side wall of the hollow connecting column is provided with a radial convex strip, and the outer side of the valve stem is provided with an anti-rotation groove matching the radial convex strip along the axial direction of the valve stem.

[0017] Optionally, the valve cover further comprises a valve cover end portion, the valve cover end portion is arranged at an end portion of the connecting section, and a radial dimension of the valve cover end portion is greater than a radial dimension of the connecting section.

[0018] Optionally, the outer periphery of the end of the valve cover is provided with a downward flange; and / or

[0019] The upper end surface of the valve cover end is provided with a slot or a cross slot.

[0020] Optionally, two circles of annular walls are arranged in the first cavity and on the partition, the two circles of annular walls are coaxially arranged with the center hole, and the height of the annular wall located on the inner circle is higher than the annular wall located on the outer circle. After the valve cover is connected to the internal thread, the connecting section is against the partition, the annular wall of the inner circle can be inserted into the connecting section and pressed against the inner wall of the connecting section, and the annular wall of the outer circle is pressed against the outer wall of the connecting section.

[0021] Optionally, the internal thread is a three-thread thread.

[0022] Optionally, the annular wall of the inner ring is inclined outward from bottom to top; and / or

[0023] A guiding inclined surface is arranged on the outer side of the upper end of the annular wall of the inner ring.

[0024] Optionally, a hollow cylinder is provided at the center hole, the hollow cylinder is coaxially arranged with the center hole, the height of the hollow cylinder located on the upper side of the partition is less than the height of the hollow connecting column, and is used to limit the stroke of the button, and the lower end of the spring is sleeved on the outside of the hollow cylinder.

[0025] Optionally, the fixing member is in the shape of a circular plate, which is located above the sealing gasket and is coaxially arranged with the valve stem.

[0026] Optionally, the fixing member is threadedly connected or clamped to the valve stem.

[0027] Optionally, the radial size of the fixing member in the valve body is smaller than the radial size of the second cavity, the radial size of the base in the valve body is larger than the radial size of the second cavity, the fixing member is located in the second cavity, and the sealing gasket is pressed against the lower end of the second cavity.

[0028] Optionally, the fixing member and the valve stem are an integral structure, and two symmetrically arranged radial openings are provided on the circumferential side of the fixing member.

[0029] Optionally, an annular platform is provided on the outer peripheral side of the upper end of the valve stem;

[0030] At least one section of a bell-shaped inclined wall section is provided in the hollow connecting column, and is inclined inward from bottom to top, and a through hole is provided above the inclination and penetrates the hollow connecting column in the radial direction, so that the upper end of the inclined wall section forms a limiting step;

[0031] The maximum diameter of the annular platform is larger than the minimum diameter of the inclined wall segment and smaller than the maximum diameter of the inclined wall segment. The valve stem extends into the hollow connecting column, and the annular platform passes upward through the inclined wall segment and is stuck at the limit step to achieve the connection between the valve core and the button.

[0032] 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

[0033] The cushion body has a receiving cavity for receiving gas or liquid filling.

[0034] The above technical solution of the utility model has the following advantages:

[0035] The switch valve provided by the utility model includes a valve body, a valve core, a button and a valve cover. 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. A center hole and a passage hole are provided on the partition. An internal thread is provided on the wall of the first cavity. The valve cover is threadedly connected to the valve body through the internal thread of the first cavity. The button is arranged in the first cavity, and the button has a hollow connecting column and a reset spring. The valve stem of the valve core passes through the center 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, and 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 performance during use and gas / liquid injection.

[0036] The seat cushion provided by the utility model adopts the switch valve and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] Figure 1 This is a schematic diagram of the exploded structure of a switch valve in the first embodiment of the utility model;

[0039] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the switch valve;

[0040] Figure 3 It is a schematic diagram of a valve body in the first embodiment of the utility model;

[0041] Figure 4 yes Figure 3 A schematic diagram of the structure of the middle valve body from another angle;

[0042] Figure 5 yes Figure 3 A schematic cross-sectional view of the middle valve body;

[0043] Figure 6 This is a schematic diagram of the structure of a button and a valve core in the first embodiment of the utility model;

[0044] Figure 7 This is a schematic diagram of the local structure of a button and a valve core matched and cut along a cross section in the first embodiment of the utility model;

[0045] Figure 8 It is a longitudinal cross-sectional schematic diagram of a button in the first embodiment of the utility model;

[0046] Fig. 9 It is a structural schematic diagram of the valve cover in the first embodiment of the utility model;

[0047] Fig.10 yes Fig. 9 A schematic cross-sectional view of the middle valve cover;

[0048] Fig.11 This is a schematic diagram of the structure of a switch valve in a closed state in an embodiment of the utility model;

[0049] Fig.12 yes Fig.11 Structural diagram of the switch valve in the normally open state;

[0050] Fig.13 yes Fig.11 A schematic diagram of a button rotation angle of a switch valve;

[0051] Fig.14 This is a schematic diagram of the structure of a switch valve in the embodiment of the utility model when injecting water / liquid;

[0052] Fig.15 This is a structural schematic diagram of a seat cushion in Embodiment 2 of the present utility model;

[0053] Fig.16 yes Fig.15 A schematic diagram of the structure of a middle seat cushion and a water-filled container in a separated state.

[0054] In the figure:

[0055] 100: switch valve;

[0056] 110: valve body;

[0057] 111: compartment;

[0058] 1111: center hole;

[0059] 1112: access hole;

[0060] 1113: exhaust / liquid identification;

[0061] 112: first cavity;

[0062] 1121: internal thread;

[0063] 113: second cavity;

[0064] 1131: chamfer;

[0065] 114: Limiting gap;

[0066] 115: convex;

[0067] 116: Angle limit block;

[0068] 117: annular wall;

[0069] 118: Hollow cylinder;

[0070] 119: extension installation part;

[0071] 120: valve core;

[0072] 121: valve stem;

[0073] 1211: Ring stage;

[0074] 1212: anti-rotation groove;

[0075] 122: base;

[0076] 1221: limit tooth;

[0077] 123: Sealing gasket;

[0078] 124: Fixing parts;

[0079] 1241: radial opening;

[0080] 130: button;.

[0081] 131: Press the board;

[0082] 1311: Indicator mark;

[0083] 132: hollow connecting column;

[0084] 1321: inclined wall segment;

[0085] 1322: limit step;

[0086] 1323: through hole;

[0087] 1324: radial ribs;

[0088] 133: Spring;

[0089] 140: Valve cover;

[0090] 141: connection segment;

[0091] 1411: External thread;

[0092] 142: Valve cover end;

[0093] 1421: Flanging;

[0094] 1422: Cross groove;

[0095] 200: Gas / liquid container;

[0096] 300: gas / liquid entry path;

[0097] 400: Seat body. DETAILED DESCRIPTION

[0098] 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.

[0099] In the description of the present invention, it should be noted 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.

[0100] Embodiment 1

[0101] See also Figure 1 and Figure 2 As shown, the switch valve 100 provided in the embodiment of the utility model includes a valve body 110 , a valve core 120 , a button 130 and a valve cover 140 .

[0102] See also Figure 3 to Figure 5 As shown, the valve body 110 has a cavity with a circular cross section, and a radially arranged partition 111 is provided in the cavity to divide the cavity into a first cavity 112 and a second cavity 113 in the vertical direction. A center hole 1111 penetrating the partition is provided at the center of the partition 111, and a passage hole 1112 penetrating the partition is provided around the center hole 1111. The center hole 1111 and the passage hole 1112 connect the first cavity 112 and the second cavity 113. An internal thread 1121 is provided on the wall of the first cavity 112.

[0103] See also Figure 1 and Figure 2 As shown, the valve core 120 is arranged in the cavity, including a valve stem 121 and a base 122. The base 122 is connected to one end of the valve stem 121. A sealing gasket 123 is provided on the upper side of the base 122. The sealing gasket 123 has a hole in the center and is sleeved on the valve stem 121. A fixing part 124 is provided on the valve stem 121. The fixing part 124 is spaced apart from the base 122 in the axial direction of the valve stem 121. A sealing gasket 123 is also sleeved on the valve stem 121. The sealing gasket 123 is located between the fixing part 124 and the base 122, and the radial size of the sealing gasket 123 is larger than the fixing part 124.

[0104] See also Figure 1 and Figure 2 As shown, the button 130 is arranged in the cavity, including a pressing plate 131 and a hollow connecting column 132 arranged on the lower side of the pressing plate 131, the lower end of the hollow connecting column 132 extends into the center hole 1111, the valve stem 121 extends into the hollow connecting column 132 and is connected to the button 130, and a spring 133 is sleeved on the outer side of the hollow connecting column 132, one end of the spring 133 abuts against the pressing plate 131, and the other end abuts against the partition 111.

[0105] See also Figure 1 , Figure 2 , Fig. 9 and Fig.10 As shown, the valve cover 140 has a connecting section 141 , which is a hollow cylinder, and an outer side of the hollow cylinder is provided with an outer thread 1411 matching the inner thread 1121 , and the valve cover 140 is connected to the valve body 110 through threads.

[0106] The switch valve 100 of this embodiment can be used in inflatable and / or liquid-filled devices such as seat cushions, pillows, and hand warmers. When the switch valve 100 is in the inflatable / liquid state, see Fig.14 As shown, the gas / liquid container 200 having an external thread structure matching the internal thread 1121 is threadedly matched with the internal thread 1121 to achieve the connection between the gas / liquid container 200 and the switch valve 100 and the first seal. By squeezing the gas / liquid container 200, the gas / liquid filling to be filled provides a downward force for the button 130. When the button 130 is subjected to downward pressure, it moves downward to compress the spring 133, and the valve core 120 moves downward with the button 130. The sealing gasket 123 moves downward with the valve core 120 and separates from the valve body 110 to form a gas / liquid channel. The gas / liquid filling to be filled passes through the switch valve 100 along the gas / liquid channel. For a schematic diagram of the gas / liquid entry path 300, see Fig.14 After the downward pressure on the button 130 disappears, the button 130 is reset under the force of the spring 133, driving the valve core 120 to move upward, the valve core 120 drives the sealing gasket 123 to move upward, and the base 122 presses the sealing gasket 123 against the valve body 110 to achieve sealing and prevent the inflated gas / liquid filling from flowing back.

[0107] In this embodiment, the structure of the switch valve is improved, and the valve core 120 is connected to the button 130 through the connection between the valve stem 121 and the button 130, and the valve core 120 is connected and moves synchronously. The sealing gasket 123 is set on the upper side of the base 122, and the synchronous movement with the valve core 120 is achieved through the fixing member 124, so as to ensure the linkage between the sealing gasket 123 and the valve core 120 and the button 130, and ensure that the switch valve has good sealing when sealing is required. In addition, by setting the internal thread 1121 in the first cavity 112, it can be convenient to connect and fix with the gas / liquid container 200, and improve the sealing during the gas / liquid filling process, so as to prevent the gas / liquid from flowing out during the injection process. By setting a valve cover threadedly connected to the valve body 110, the sealing performance during normal use is further improved, and the occurrence of gas / liquid leakage from the switch valve is reduced.

[0108] In order to further improve the sealing effect of the switch valve 100 and to keep the switch valve in a normally open state when exhaust / liquid is required, see Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the lower end of the valve body 110 is provided with a plurality of limiting notches 114 spaced apart along the circumferential direction, and a protrusion 115 is formed between two adjacent limiting notches 114. The outer circumference of the base 122 is provided with limiting teeth 1221 that match the limiting notches 114. Fig.11 As shown, in the sealed state, the limiting tooth 1221 is locked in the limiting notch 114. Fig.12 As shown, by pressing the button 130 downward, the limiting tooth 1221 can be disengaged from the limiting notch 114, and then the button 130 is rotated, the valve core 120 and the button 130 rotate synchronously, and the limiting tooth 1221 is pressed against the lower end of the protrusion 115 under the action of the spring 133, so that the switch valve 100 remains normally open. At this time, the device installed with the switch valve 100, such as a seat cushion, can be squeezed to discharge the air or other liquid fillers inside. After the air or other liquid fillers are discharged, the button 130 is rotated in the opposite direction, and the switch valve 100 is closed and kept sealed. The seat cushion is made more convenient to empty, and after emptying, it is convenient to inject gas / liquid fillers, avoiding abnormal noise during use or liquid spraying during injection due to the inability to fill the new filler due to the gas in the seat cushion.

[0109] In order to better guide users to operate and improve the user experience, see Figure 1 , Figure 2 , Figure 4 , Fig.11 and Fig.12As shown, in some embodiments, at least at the lower ends of the two protrusions 115 located on both sides of one of the limiting notches 114, an angle limiting block 116 is provided to limit the rotation angle of the limiting tooth 1221. Fig.11 and Fig.12 As shown, the angle limiting block 116 is a convex block whose size in the circumferential direction is smaller than the protrusion 115 , and it can rotate a certain angle when the limiting tooth 1221 is rotated and block the limiting tooth 1221 .

[0110] In order to further guide the user operation, in some embodiments, see Fig.13 As shown, an indicator mark 1311 is provided on the pressing plate 131, and an exhaust / liquid mark 1113 is provided on the interlayer 111. In the sealed state (when the limiting tooth 1221 is located in the limiting notch 114), the indicator mark 1311 is staggered with the exhaust / liquid mark 1113. When the exhaust / liquid operation is required, the button 130 is pressed and rotated in the direction of the exhaust / liquid mark 1113. In one example, the rotation is 25°, which is the rotation to the full position and is blocked by the angle limiting block 116.

[0111] Regarding the connection between the valve stem 121 and the button 130, in some embodiments, see Figure 1 , Figure 2 , Figure 6 and Figure 8 As shown, an annular platform 1211 is provided on the outer peripheral side of the upper end of the valve stem 121. The annular platform 1211 can be formed by protruding toward the outer peripheral side, or by opening an annular groove, which is not limited here. At least one section of a bell-shaped inclined wall section 1321 is provided in the hollow connecting column 132, and is inclined inward from bottom to top. A through hole 1323 is provided above the inclination and penetrates the hollow connecting column in the radial direction, so that a limiting step 1322 is formed at the upper end of the inclined wall section. The main function of the through hole 1323 is to reduce material stress and facilitate assembly.

[0112] In one embodiment, the through hole 1323 is a rectangular hole. The maximum diameter of the annular platform 1211 is larger than the minimum diameter of the inclined wall section 1321 and smaller than the maximum diameter of the inclined wall section 1321. The valve stem 121 extends into the hollow connecting column 132, and the annular platform 1211 passes through the inclined wall section 1321 upward and is stuck at the limiting step 1322, so as to realize the connection between the valve core 120 and the button 130. In this embodiment, the valve stem 121 with interference fit can pass through the inclined wall section 1321 through the guidance of the inclined wall section 1321, and then realizes the clamping connection. Preferably, the valve core 120 and the button 130 are made of ABS plastic.

[0113] In order to improve the rotation synchronization between the valve core 120 and the button when the button 130 rotates, in some embodiments, see Figure 1 and Figure 7As shown, the inner wall of the hollow connecting column 132 is provided with a radial convex strip 1324 , and the outer side of the valve stem 121 is provided with an anti-rotation groove 1212 matching the radial convex strip 1324 along the axial direction of the valve stem 121 .

[0114] In an example of this embodiment, the button 130 is made of POM or ABS plastic, and the spring 133 is a stainless steel cylindrical spring.

[0115] In some other embodiments, the valve stem 121 is threadedly connected to the hollow connecting column 132 .

[0116] In this embodiment, preferably, the valve body 110 is made of TPU (thermoplastic polyurethane) material, which has slight elasticity.

[0117] In one example, see Figure 1 , Figure 2 , Fig. 9 and Fig.10 As shown, the valve cover 140 further includes a valve cover end 142, which is disposed at the end of the connecting section 141, and the radial dimension of the valve cover end 142 is greater than the radial dimension of the connecting section 141. Preferably, the outer periphery of the valve cover end 142 is provided with a downward flange 1421 to form a groove for accommodating the end of the valve body 110.

[0118] In an example of this embodiment, the valve cover 140 is made of soft ABS or PE material.

[0119] To facilitate tightening and disassembly, in one example, the upper end surface of the valve cover end 142 is provided with a slot or a cross slot 1422, which facilitates the use of objects such as keys, coins, iron sheets or flat-blade screwdrivers to insert into the slot to assist in rotating and opening the valve cover 140.

[0120] In order to further improve the sealing effect of the switch valve 100 during the process of injecting gas / liquid fillings and during use, in some embodiments, two circles of annular walls 117 are arranged in the first cavity 112 and on the interlayer 111, and the two circles of annular walls 117 are arranged coaxially with the central hole 1111, and the height of the annular wall 117 located in the inner circle is higher than the annular wall 117 located in the outer circle. After the valve cover 140 is connected to the internal thread 1121, the end of the connecting section 141 is against the interlayer 111 to form an end seal. The inner circle annular wall 117 can be inserted into the connecting section 141 and pressed against the inner wall of the connecting section 141, and the outer circle annular wall 117 is pressed against the outer wall of the connecting section 141 to achieve inner and outer sealing. During the process of injecting gas / liquid fillings, the connection between the connecting port of the gas / liquid container 200 and the valve body 110 is the same as the connection between the connecting section 141 and the annular wall 117. Here, a mineral water bottle is used as an example of a gas / liquid container for explanation. The inner thread 1121 is a thread structure matching the thread of the mineral water bottle mouth. When injecting gas / liquid, the inner ring wall 117 can be inserted into the mineral water bottle mouth and pressed against the inner wall of the mineral water bottle mouth, and the outer ring wall 117 presses against the outer wall of the mineral water bottle mouth, achieving multiple sealing to avoid water spraying outward or obvious gas leakage.

[0121] In one embodiment, the inner ring annular wall 117 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 117, preferably, the outer side of the upper end of the inner ring annular wall 117 is provided with a guiding inclined surface, such as a chamfered guiding structure.

[0122] In order to improve the sealing effect as much as possible while ensuring that the sealing gasket 123 and the valve core 120 have good integrated linkage, in some embodiments, see Figure 1 As shown, the fixing member 124 is in the shape of a circular plate. The circular plate-shaped fixing member 124 is located above the sealing gasket 123 and is coaxially arranged with the valve stem 121, and its diameter is smaller than the diameter of the sealing gasket 123, that is, an annular groove is formed between the fixing member 124 and the base 122 to accommodate the sealing gasket 123. The diameter of the sealing gasket 123 is larger than the diameter of the fixing member 124, so that when sealing, the sealing gasket 123 is guaranteed to be tightly pressed against the barrier layer 111, so that better sealing can be achieved. The fixing member 124 and the valve stem 121 can be an integral structure or a detachable split structure. If it is an integral structure, in order to ensure the sealing effect as much as possible and to realize the installation of the sealing gasket 123 at the same time, in some embodiments, see Figure 1 and Figure 7As shown, the circumferential side of the fixing member 124 is provided with two symmetrically arranged radial openings 1241. When installing the sealing gasket 123, the hole of the sealing gasket 123 is first set at one radial opening 1241, and the sealing gasket 123 is pulled along the outer circumference of the fixing member 124 to be inserted into the other radial opening 1241. At this time, the sealing gasket 123 is half inserted, and the two radial openings 1241 limit the sealing gasket 123 to prevent it from falling off. Then the sealing gasket is pulled again to insert the entire sealing gasket 123, avoiding the opening of an overly large hole on the sealing gasket, and achieving the installation of the sealing gasket 123.

[0123] In other embodiments, the fixing member 124 is in the shape of a circular ring plate, the valve stem 121 is provided with an external thread structure, and the fixing member 124 is threadedly connected to the valve stem 121 .

[0124] In another embodiment, the fixing member 124 is in the shape of a circular ring plate, and a slot is provided on the valve stem 121 . The fixing member 124 is interference fit with the valve stem 121 , and is moved to the slot and inserted therein to fix the sealing gasket 123 .

[0125] Of course, in some other embodiments, the fixing member 124 may also be other structures, such as buckles, screws, etc. The fixing member 124 may also be a plurality of pressure strips arranged at intervals along the circumferential direction.

[0126] In order to further improve the sealing effect, in some embodiments, the radial dimension of the fixing member 124 in the valve body 110 is smaller than the radial dimension of the second cavity 113, the radial dimension of the base 122 in the valve body 110 is larger than the radial dimension of the second cavity 113, the fixing member 124 is located in the second cavity 113, and the sealing gasket 123 is pressed against the lower end of the second cavity 113. Figure 5 As shown, a chamfer 1131 is provided at the lower end of the second cavity 113 , and when the switch valve 100 is in a sealed state, the sealing gasket 123 is tightly fitted at the chamfer 1131 , further improving the sealing effect.

[0127] In an example of this embodiment, the sealing gasket 123 is a soft sealing gasket made of silicone, and preferably, one side thereof is a smooth surface.

[0128] To facilitate installation of the sealing gasket 123 , in some embodiments, the base 122 is threadedly connected to the valve stem 121 .

[0129] In an example of this embodiment, the valve core 120 can be made of plastic materials such as ABS, POM, and nylon.

[0130] To facilitate the installation of the switch valve 100, in some embodiments, see Figure 4 and Figure 5 As shown, an extended mounting portion 119 is provided on the outer peripheral side of the valve body 110 .

[0131] In order to facilitate positioning of the spring 133 and limit the travel of the button 130, in some embodiments, see FIG. Figure 3 and Figure 5 As shown, a hollow cylinder 118 is provided at the center hole 1111. The hollow cylinder 118 is coaxially arranged with the center hole 1111. The height of the hollow cylinder 118 located on the upper side of the partition 111 is less than the height of the hollow connecting column 132, and is used to limit the stroke of the button 130. The lower end of the spring 133 is sleeved on the outside of the hollow cylinder 118.

[0132] In order to ensure the sealing effect, the existing switch valve generally has a relatively large elastic force. When inflating / liquid, it is generally necessary to use a booster tool such as an electric pump to move the button 130 downward under pressure. In this embodiment, according to the structure of the internal thread 1121 on the valve body 110, the switch valve 100 can use a matching gas / liquid container for gas / liquid operation, which reduces the requirements for the gas / liquid device. For example, the internal thread 1121 uses a three-line thread (the thread used by most mineral water bottles on the market), and the user can directly use a mineral water bottle for gas / liquid operation without preparing or purchasing a special gas / liquid device. In addition, due to the good sealing effect, the spring no longer needs excessive elastic force, which is more convenient for gas / liquid injection. Of course, the internal thread 1121 can use other existing thread structures, such as pipe threads. Correspondingly, the gas / liquid container only needs to have a matching connection structure (similar to the connection section in this application).

[0133] Embodiment 2

[0134] See also Fig.15 and Fig.16 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 400. The seat cushion body 400 has a receiving cavity for receiving gas or liquid filling.

[0135] 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.

[0136] 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, characterized in that: include: A valve body, wherein the interior of the valve body has a cavity with a circular cross section, wherein a radially arranged partition is provided in the cavity, and the cavity is divided into a first cavity and a second cavity in the vertical direction, wherein a central hole penetrating the partition is provided at the center of the partition, and passage holes penetrating the partition are provided around the central hole, and an internal thread is provided on the wall of the first cavity; The valve cover has a connecting section, the connecting section is a hollow cylinder, and the outer side of the hollow cylinder is provided with an external thread matching the internal thread, and the valve cover is connected to the valve body through threads; a valve core, arranged in the cavity, comprising a valve stem and a base, wherein the base is connected to one end of the valve stem, a fixing piece is arranged on the valve stem, the fixing piece is spaced apart from the base in the axial direction of the valve stem, a sealing gasket is sleeved on the valve stem, the sealing gasket is located between the fixing piece and the base, and the radial dimension of the sealing gasket is larger than that of the fixing piece; and A button is arranged in the cavity, comprising a pressing plate and a hollow connecting column arranged at the lower side of the pressing plate, the lower end of the hollow connecting column extends into the central hole, the other end of the valve stem extends into the hollow connecting column to be connected with the button, a spring is sleeved on the outer side of the hollow connecting column, one end of the spring abuts against the pressing plate, and the other end abuts against the partition; The base presses the sealing gasket against the valve body; When the button is subjected to downward pressure, it moves downward to compress the spring, the valve core moves downward along with the button, and the sealing gasket moves downward along with the valve core to form a gap with the partition.

2. The switch valve according to claim 1, characterized in that: The lower end of the valve body is provided with a plurality of limiting notches at intervals along the circumferential direction, and a protrusion is formed between two adjacent limiting notches; The outer peripheral side of the base is provided with a limiting tooth matched with the limiting notch; In the sealed state, the limiting tooth is clamped in the limiting notch, and the limiting tooth can be disengaged from the limiting notch by pressing the button downward, and the button is rotated, and the limiting tooth is pressed against the lower end of the protrusion under the action of the spring.

3. The switch valve according to claim 2, characterized in that: Angle limiting blocks are provided at the lower ends of at least two of the protrusions located on both sides of one of the limiting notches, for limiting the rotation angle of the limiting tooth.

4. The switch valve according to claim 2, characterized in that: The inner side wall of the hollow connecting column is provided with a radial convex strip, and the outer side of the valve stem is provided with an anti-rotation groove matching the radial convex strip along the axial direction of the valve stem.

5. The switch valve according to claim 1, characterized in that: The valve cover further comprises a valve cover end portion, wherein the valve cover end portion is arranged at an end portion of the connecting section, and a radial dimension of the valve cover end portion is greater than a radial dimension of the connecting section.

6. The switch valve according to claim 5, characterized in that: The outer periphery of the end of the valve cover is provided with a downward flange; and / or The upper end surface of the valve cover end is provided with a straight groove or a cross groove.

7. The switch valve according to claim 1, characterized in that: Two circles of annular walls are arranged in the first cavity and on the partition, the two circles of annular walls are coaxially arranged with the center hole, and the height of the annular wall located on the inner circle is higher than the annular wall located on the outer circle. After the valve cover is connected to the internal thread, the connecting section is against the partition, the annular wall of the inner circle can be inserted into the connecting section and pressed against the inner wall of the connecting section, and the annular wall of the outer circle is pressed against the outer wall of the connecting section.

8. The switch valve according to claim 7, characterized in that: The internal thread is a three-thread thread.

9. The switch valve according to claim 7, characterized in that: 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.

10. The switch valve according to claim 1, characterized in that: A hollow cylinder is provided at the center hole, and the hollow cylinder is coaxially arranged with the center hole. The height of the hollow cylinder located on the upper side of the partition is less than the height of the hollow connecting column, and is used to limit the stroke of the button. The lower end of the spring is sleeved on the outside of the hollow cylinder.

11. The switch valve according to claim 1, characterized in that: The fixing piece is in the shape of a circular plate and is located above the sealing pad and is coaxially arranged with the valve stem.

12. The switch valve according to claim 11, characterized in that: The fixing piece is threadedly connected or clamped with the valve stem.

13. The switch valve according to claim 1 or 11, characterized in that: The radial dimension of the fixing part in the valve body is smaller than the radial dimension of the second cavity, the radial dimension of the base in the valve body is larger than the radial dimension of the second cavity, the fixing part is located in the second cavity, and the sealing gasket is pressed against the lower end of the second cavity.

14. The switch valve according to claim 11, characterized in that: The fixing member and the valve stem are an integral structure, and two symmetrically arranged radial openings are provided on the circumferential side of the fixing member.

15. The switch valve according to claim 1, characterized in that: An annular platform is provided on the outer peripheral side of the upper end of the valve stem; At least one inclined wall section in the shape of a bell mouth is provided in the hollow connecting column, and is inclined inward from bottom to top, and a through hole is provided above the inclination and penetrates the hollow connecting column in the radial direction, so that the upper end of the inclined wall section forms a limiting step; The maximum diameter of the annular platform is larger than the minimum diameter of the inclined wall segment and smaller than the maximum diameter of the inclined wall segment. The valve stem extends into the hollow connecting column, and the annular platform passes upward through the inclined wall segment and is stuck at the limiting step to achieve the connection between the valve core and the button.

16. A seat cushion, characterized in that: comprising the switch valve according to any one of claims 1 to 15; and The cushion body has a receiving cavity for receiving gas or liquid filling.

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