Novel air return prevention valve and inflation product

Abstract

The invention relates to a novel air return prevention valve and an inflation product, and belongs to the technical field of ventilation devices. The deformation part is arranged on the one-way diaphragm, the characteristic that the deformation part can generate compression deformation is utilized, the telescopic stroke of the automatic telescopic locking mechanism is matched, an elastic structure does not need to be additionally arranged on the support, good sealing of the valve can be maintained, and the structural complexity of the valve is reduced.

Description

Technical Field

[0001] This application relates to the field of ventilation device technology, and more specifically, to a novel anti-backflow valve and inflation product. Background Technology

[0002] Inflatable products are suitable for many everyday situations due to their lightweight and ease of use. Among them, self-inflating products made with resilient materials (such as foam), like self-inflating mattresses, are increasingly popular because they require no inflation and offer greater convenience. However, when deflating self-inflating products, they are prone to back-inflation, making them difficult to store.

[0003] Currently, methods such as using two opposite check valves, valves with reversible check valves, or valves with flip-top valve cores are used to improve the problem of backflow expansion in self-inflating products during storage. Using two opposite check valves is generally more expensive and takes up more space. While using reversible check valves reduces the number of check valves, the overall structure is more complex, and the product's integration is weak. Using a flip-top valve core reduces the number of check valves and meets the requirements of a simpler structure and stronger integration, but flipping the valve core requires the user to insert their fingers into the valve, making it relatively difficult. Summary of the Invention

[0004] To address the difficulty of reversing the valve core while maintaining a simple structure and strong integration, a bracket and a one-way diaphragm that can move in opposite directions and out of direction can be installed within the fluid channel to switch the direction of the one-way closed fluid channel (for ease of explanation, the two states of the one-way closed fluid channel, namely the one-way air intake state and the one-way air exhaust state, are referred to as the first state and the second state), and an automatic telescopic locking mechanism is used to drive the movement of the one-way diaphragm.

[0005] However, the extension stroke of the output end of the automatic telescopic locking mechanism is greater than the distance between its position in the first state and its position in the second state. That is, when switching between the first and second states, the output end of the automatic telescopic locking mechanism will continue to extend a certain distance after reaching the position in the first or second state before retracting back to that position. Therefore, in actual use, an elastic structure is installed on the bracket to match this process, ensuring that the bracket and the one-way diaphragm fit together. However, this structure increases the risk of valve leakage and also increases the structural complexity of the valve.

[0006] The purpose of this application is to provide a novel anti-backflow valve and inflation product, which can match the extension and retraction stroke of the automatic telescopic locking mechanism without additional elastic structure on the bracket.

[0007] In a first aspect, embodiments of this application provide a novel anti-backflow valve. The valve includes: a housing, a valve core assembly, and an automatic telescopic locking mechanism. The housing has a fluid channel, which includes a first air port and a second air port. The valve core assembly includes a bracket and a one-way diaphragm. The bracket has a through hole. The bracket and the one-way diaphragm are installed in the fluid channel and can move towards each other or away from each other to achieve switching between a first state and a second state. In the first state, the bracket and the one-way diaphragm fit together and cover the through hole, and the bracket is located on the side of the fitted one-way diaphragm closer to the first air port. The fluid channel can be unidirectionally connected along the direction from the first air port to the second air port. In the second state, the bracket and the one-way diaphragm fit together and cover the through hole. A through-hole and a support are provided on the side of the unidirectional diaphragm close to the second air port, and the fluid channel can be unidirectionally connected along the direction from the second air port to the first air port; an automatic telescopic locking mechanism is installed in the fluid channel of the housing, and the output end of the automatic telescopic locking mechanism is connected to the unidirectional diaphragm to drive the unidirectional diaphragm to move towards or away from the support; wherein, the unidirectional diaphragm includes a diaphragm body and a deformation part, the deformation part is configured to deform in the telescopic direction of the output end of the automatic telescopic locking mechanism, the deformation part is connected to the output end of the automatic telescopic locking mechanism, and the diaphragm body is connected to the end of the deformation part away from the automatic telescopic locking mechanism.

[0008] In the implementation of this application, by setting a deformation part on the unidirectional diaphragm and utilizing its compressive deformation characteristic to match the extension stroke of the automatic telescopic locking mechanism, there is no need to set an additional elastic structure on the support, which can maintain a good seal of the valve and reduce the structural complexity of the valve.

[0009] As an optional implementation, the diaphragm body is an annular diaphragm, and the deformable part is a cup-shaped diaphragm.

[0010] As an alternative implementation, the connection end between the cup diaphragm and the automatic telescopic locking mechanism is larger than the connection end between the cup diaphragm and the annular diaphragm.

[0011] In the above implementation process, by controlling the connection end of the cup diaphragm and the automatic telescopic locking mechanism to be larger than the connection end of the cup diaphragm and the annular diaphragm, the impact on the annular diaphragm can be reduced when the cup diaphragm deforms, so that the annular diaphragm and the support can maintain a good fit and achieve one-way sealing.

[0012] As an optional implementation, the connection end between the cup diaphragm and the annular diaphragm is larger than the connection end between the cup diaphragm and the automatic telescopic locking mechanism.

[0013] In the above implementation process, by controlling the connection end of the cup diaphragm and the annular diaphragm to be larger than the connection end of the cup diaphragm and the automatic telescopic locking mechanism, it is possible to facilitate the preparation of the unidirectional diaphragm and provide the possibility for the integral molding of the cup diaphragm and the annular diaphragm.

[0014] As an alternative implementation, the annular diaphragm and the cup-shaped diaphragm are integrally molded.

[0015] In the above implementation process, the use of integrally molded annular diaphragms and cup diaphragms can achieve good sealing performance and a good one-way sealing effect.

[0016] As an alternative implementation, the annular membrane is a soft membrane.

[0017] In the above implementation process, a soft membrane is used as an annular membrane. The elasticity of the soft membrane itself is used to cooperate with the support to achieve unidirectional closure of the fluid channel. The overall structure is relatively simple.

[0018] As an optional implementation, the annular diaphragm is a rigid diaphragm.

[0019] In the above implementation process, a rigid diaphragm is used as an annular diaphragm, which makes the entire valve component have higher strength and can be applied to more application scenarios.

[0020] As an alternative implementation, the through-hole is covered by the annular diaphragm.

[0021] In the above implementation process, by covering the through hole with an annular diaphragm, the fluid can more easily push the annular diaphragm away from the support, thereby achieving one-way ventilation.

[0022] As an optional implementation, the automatic telescopic locking mechanism includes a switching lever, a positioning block, and an elastic element; The switching rod is parallel to the central axis of the fluid channel and can move axially to fit into the fluid channel. There is a flow channel connecting the first air port and the second air port between the switching rod and the fluid channel. The outer wall of the switching rod is provided with an annular groove along its circumference. The first side of the annular groove is provided with an equal number of first and second state grooves with openings facing the second side along the circumference of the switching rod. The positioning block is movably fitted into the annular groove and can enter and exit the first and second state grooves. The second side of the annular groove is provided with at least two switching grooves with openings facing the first side evenly along the circumference of the switching rod. The number of switching grooves is twice that of the second state grooves. The switching groove has a guide surface for moving and abutting the positioning block. The distance from the guide surface to the top of the switching rod gradually increases along the circumference of the switching rod. The positioning block is installed on the housing; An elastic element is disposed between the switching rod and the housing. The elastic element is used to drive the switching rod to move along its axial direction so that the positioning block enters one of the first state slot and the second state slot. When the positioning block enters the first state slot, the valve core assembly is in the first state, and when the positioning block enters the second state slot, the valve core assembly is in the second state.

[0023] As an optional implementation, the deformation limit stroke of the deformable part is greater than or equal to the movement distance of the positioning block in the switching groove.

[0024] As an optional implementation, there are two supports, which are spaced apart, with a unidirectional diaphragm placed between the two supports.

[0025] Secondly, embodiments of this application provide an inflatable product, which includes a body and a valve provided in the first aspect, which is installed on the body, with the valve housing connected to the body. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the valve structure provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the valve structure provided in the embodiments of this application. Figure 2 ; Figure 3 This is a schematic diagram of the exploded structure of the valve provided in an embodiment of this application; Figure 4 Cross-sectional view of the valve provided in the embodiments of this application Figure 1 ; Figure 5 Cross-sectional view of the valve provided in the embodiments of this application Figure 2 ; Figure 6 Cross-sectional view of the valve provided in the embodiments of this application Figure 3 ; Figure 7 Cross-sectional view of the valve provided in the embodiments of this application Figure 4 ; Figure 8 This is a schematic diagram of the structure of the unidirectional diaphragm provided in the embodiments of this application; Figure 9 This is a schematic diagram of the automatic telescopic locking mechanism provided in the embodiments of this application; Figure 10 A cross-sectional view of the housing provided in an embodiment of this application; Figure 11 A schematic diagram illustrating the fit between the sleeve, sealing member, and automatic telescopic locking mechanism provided in the embodiments of this application; Figure 12 This is a schematic diagram of the structure of the inflatable product provided in the embodiments of this application.

[0028] Reference numerals: 1-Valve; 11-Housing; 111-Fluid passage; 1111-First air port; 1112-Second air port; 112-Annular groove; 113-Housing body; 114-Mounting sleeve; 12-Valve core assembly; 121-Bracket; 1211-Through hole; 122-One-way diaphragm; 1221-Diaphragm body; 1222-Deformation part; 13-Automatic telescopic locking mechanism; 131-Switching rod; 131a-First rod body; 131b-Second rod body; 1311-Annular groove; 1312- Switching groove; 1313-Guide surface; 1314-First state groove; 1315-Second state groove; 1316-Protruding edge; 132-Positioning block; 133-Elastic element; 14-Locking component; 141-First component; 1411-First switching groove; 1412-One-way state holding groove; 142-Second component; 1421-Protrusion; 143-Third component; 1431-Second switching groove; 1432-Sealed holding groove; 15-Sleeve; 16-Sealing component; 2-Inflatable product; 21-Body. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Self-inflating products are prone to backflow and expansion during deflation, making them difficult to store. Current methods to address this issue include using two one-way valves with opposite airflow directions, valves with reversible valve cores to switch airflow direction, and valves with flip-up valve cores to change airflow direction. Using two one-way valves with opposite airflow directions is generally more expensive and bulkier. While valves with reversible valve cores reduce the number of one-way valves, the overall structure is more complex, resulting in a less integrated product design. Valve cores with flip-up valve cores reduce the number of one-way valves and offer a simpler, more integrated design, but flipping the valve core requires the user to insert their finger inside the valve, making it difficult to achieve.

[0033] To address the difficulty of reversing the valve core while maintaining a simple structure and strong integration, a bracket and a one-way diaphragm that can move in opposite directions and out of direction can be installed within the fluid channel to switch the direction of the one-way closed fluid channel (for ease of explanation, the two states of the one-way closed fluid channel, namely the one-way air intake state and the one-way air exhaust state, are referred to as the first state and the second state), and an automatic telescopic locking mechanism is used to drive the movement of the one-way diaphragm.

[0034] However, the extension stroke of the output end of the automatic telescopic locking mechanism is greater than the distance between its position in the first state and its position in the second state. That is, when switching between the first and second states, the output end of the automatic telescopic locking mechanism will continue to extend a certain distance after reaching the position in the first or second state before retracting back to that position. Therefore, in actual use, an elastic structure is installed on the bracket to match this process, ensuring that the bracket and the one-way diaphragm fit together. However, this structure increases the risk of valve leakage and also increases the structural complexity of the valve.

[0035] This application aims to provide a novel anti-backflow valve that can be extended and retracted by an automatic telescopic locking mechanism without the need for additional elastic structures on the bracket.

[0036] Figure 1 and Figure 2 This is a schematic diagram of the valve structure provided in an embodiment of this application. Figure 3 This is an exploded view of the valve provided in an embodiment of this application. Figures 4 to 7 For a cross-sectional view of the valve provided in the embodiments of this application, please refer to... Figures 1 to 7 This application provides a backflow prevention valve to prevent accidental contact and leakage. The valve 1 includes: a housing 11, a valve core assembly 12, an automatic telescopic locking mechanism 13, and a locking assembly 14. The housing 11 has a fluid channel 111, which includes a first air port 1111 and a second air port 1112. The valve core assembly 12 includes a bracket 121 and a one-way diaphragm 122. The bracket 121 has a through hole 1211. The bracket 121 and the one-way diaphragm 122 are installed in the fluid channel 111 and can move towards each other or away from each other to switch between a first state and a second state. In the first state, the bracket 121 and the one-way diaphragm 122 are fitted to cover the through hole 1211, and the bracket 121 is located on the side of the fitted one-way diaphragm 122 near the first air port 1111. The fluid channel 111 can move along the direction from the first air port 1111 to the second air port 1112. In the second state of unidirectional communication, the bracket 121 and the unidirectional diaphragm 122 are fitted to cover the through hole 1211, and the bracket 121 is located on the side of the fitted unidirectional diaphragm 122 near the second air port 1112. The fluid channel 111 can be unidirectionally connected along the direction from the second air port 1112 to the first air port 1111. The automatic telescopic locking mechanism 13 is installed in the fluid channel 111 of the housing 11. The output end of the automatic telescopic locking mechanism 13 is connected to the unidirectional diaphragm 122 to drive the unidirectional diaphragm 122 to move towards or away from the bracket 121. The unidirectional diaphragm 122 includes a diaphragm body 1221 and a deformation part 1222. The deformation part 1222 is connected to the output end of the automatic telescopic locking mechanism 13, and the diaphragm body 1221 is connected to the end of the deformation part 1222 away from the automatic telescopic locking mechanism 13.

[0037] It should be noted that there is an intermediate state during the transition between the first and second states; please refer to the following documentation. Figure 6 In the intermediate state, the support 121 and the unidirectional diaphragm 122 are spaced apart.

[0038] The shell 11 can have various shapes, such as a cube, cuboid, or cylinder. The cross-section of the fluid channel 111 inside can be square, elliptical, or circular, but is preferably circular.

[0039] The shell 11 can be made of various materials, such as metal materials like aluminum alloy, copper alloy, or stainless steel, or non-metallic materials like plastic.

[0040] The first air port 1111 and the second air port 1112 of the fluid channel 111 can arbitrarily serve as the fluid inlet and outlet, respectively. The first air port 1111 and the second air port 1112 can be located at any position, such as the side wall or end wall of the housing 11. The shape of the first air port 1111 is not limited; it can be circular, square, fan-shaped, etc., and the number of first air ports 1111 is also not limited; it can be 1, 2, 3, 4, etc. Similarly, the shape of the second air port 1112 is not limited; it can be circular, square, fan-shaped, etc., and the number of second air ports 1112 is also not limited; it can be 1, 2, 3, 4, etc.

[0041] The support 121 can be in the form of a perforated disc, ring, etc. The structure of the perforated disc-shaped support 121 matches the cross-sectional shape of the fluid channel 111 of the housing 11. The support 121 can have various structural forms, such as a circular, square, or elliptical plate structure. Preferably, the shape of the support 121 is circular, consistent with the cross-sectional shape of the fluid channel 111. A through hole 1211 is formed on the disc-shaped support 121, creating a perforation. The structure of the ring-shaped support 121 matches the cross-sectional shape of the fluid channel 111 of the housing 11. The support 121 can have various structural forms, such as a circular, square, or elliptical ring structure. Preferably, the shape of the support 121 is circular, consistent with the cross-sectional shape of the fluid channel 111. A through hole 1211 is naturally formed in the radial center of the ring-shaped support 121, and the shape of the inner side of the ring-shaped support 121 is not limited, and it can have protrusions 1421, etc. The bracket 121 is mounted on the housing 11, or it can be integrally formed with the housing 11. One side surface of the bracket 121 and the one-way diaphragm 122 are fitted together to achieve one-way closure of the fluid channel 111.

[0042] The bracket 121 can be made of various materials, such as metal materials like aluminum alloy, copper alloy, or stainless steel, or non-metallic materials like plastic.

[0043] Figure 8 For a schematic diagram of the structure of the unidirectional diaphragm 122 provided in the embodiments of this application, please refer to [link / reference]. Figure 8 The one-way diaphragm 122 may include a diaphragm body 1221 and a deformable part 1222. The diaphragm body 1221 may be sheet-shaped. The sheet-shaped diaphragm body 1221 may be made of an elastic material, so that the diaphragm body 1221 can return to its original shape without external force. The through hole 1211 on the sealing bracket 121 achieves one-way sealing. One-way sealing means that fluid can only flow from one side of the through hole 1211 to the other side by pushing open the one-way diaphragm 122. Otherwise, the one-way diaphragm 122 will be pressed against the sealing bracket 121 to maintain a seal.

[0044] The first state refers to the state in which the fluid channel 111 can be opened unidirectionally along the direction from the first air port 1111 to the second air port 1112. (See also...) Figure 4 The intermediate state refers to the state in which the fluid channel 111 can be opened in both directions. (See also...) Figure 6 The second state refers to the state in which the fluid channel 111 can be opened unidirectionally along the direction from the second air port 1112 to the first air port 1111. (See reference...) Figure 5 .

[0045] The automatic telescopic locking mechanism 13 refers to a mechanism that achieves two locking positions in the telescopic direction by pressing, such as the automatic telescopic locking mechanism of a ballpoint pen. When this mechanism is applied to a valve, it can switch between two states (first state and second state) by pressing.

[0046] The valve 1 uses a deformable part 1222 on the one-way diaphragm 122 to make compressive deformation, which matches the extension stroke of the automatic telescopic locking mechanism 13. This eliminates the need for an additional elastic structure on the bracket 121, maintains a good seal for the valve 1, and reduces the structural complexity of the valve 1.

[0047] Those skilled in the art will understand that the deformation limit stroke of the deformation part 1222 matches the length of the switching slot 1312 of the automatic telescopic locking mechanism 13. For example, it can be set that the deformation limit stroke of the deformation part 1222 is greater than the length of the switching slot 1312 of the automatic telescopic locking mechanism 13.

[0048] In some embodiments, the diaphragm body 1221 is an annular diaphragm, and the deformable portion 1222 is a cup-shaped diaphragm. In other words, the entire unidirectional diaphragm 122 has a recessed center forming the deformable portion 1222. Those skilled in the art will understand that, for ease of unidirectional ventilation, the through-hole 1211 of the support 121 should be covered by the diaphragm body 1221. In other embodiments, the diaphragm body 1221 may also be a complete sheet, in which case the cup-shaped diaphragm needs to be provided with necessary venting holes.

[0049] In some embodiments, the connection end between the cup-shaped diaphragm and the automatic telescopic locking mechanism 13 is larger than the connection end between the cup-shaped diaphragm and the annular diaphragm. By controlling the connection end between the cup-shaped diaphragm and the automatic telescopic locking mechanism 13 to be larger than the connection end between the cup-shaped diaphragm and the annular diaphragm, the impact on the annular diaphragm can be reduced when the cup-shaped diaphragm deforms, so that the annular diaphragm and the support 121 maintain a good fit and achieve unidirectional sealing.

[0050] In some embodiments, the connection end between the cup-shaped diaphragm and the annular diaphragm is larger than the connection end between the cup-shaped diaphragm and the automatic telescopic locking mechanism 13. By controlling the connection end between the cup-shaped diaphragm and the annular diaphragm to be larger than the connection end between the cup-shaped diaphragm and the automatic telescopic locking mechanism 13, it is easier to prepare the unidirectional diaphragm 122, making it possible to integrally form the cup-shaped diaphragm and the annular diaphragm.

[0051] In some embodiments, the connection end of the cup diaphragm and the annular diaphragm is the same size as the connection end of the cup diaphragm and the automatic telescopic locking mechanism 13.

[0052] In some embodiments, the annular diaphragm and the cup-shaped diaphragm are integrally molded. Using an integrally molded annular diaphragm and cup-shaped diaphragm provides better sealing and achieves a better one-way sealing effect.

[0053] In some embodiments, the annular diaphragm is a soft diaphragm. By using a soft diaphragm as the annular diaphragm, the elasticity of the soft diaphragm itself is utilized to cooperate with the support 121 to achieve unidirectional closure of the fluid channel 111, resulting in a relatively simple overall structure. In other embodiments, the annular diaphragm is a rigid diaphragm. Using a rigid diaphragm as the annular diaphragm gives the entire valve 1 component higher strength, making it suitable for more application scenarios.

[0054] Figure 9 For a structural schematic diagram of the automatic telescopic locking mechanism 13 provided in the embodiments of this application, please refer to [link / reference]. Figure 9In some embodiments, the automatic telescopic locking mechanism 13 includes a switching rod 131, a positioning block 132, and an elastic element 133; the switching rod 131 is parallel to the central axis of the fluid channel 111, and the switching rod 131 is axially movable and engages with the fluid channel 111; a flow channel connecting the switching rod 131 and the fluid channel 111 communicates with the first air port 1111 and the second air port 1112; an annular groove 1311 is provided on the outer wall of the switching rod 131 along its circumference; the first side of the annular groove 1311 is alternately provided with the same number of first state grooves 1314 and second state grooves 1315 opening towards the second side along the circumference of the switching rod 131; the positioning block 132 is movably engaged with the annular groove 1311 and can enter and exit the first state groove 1314 and the second state groove 1315; at least two switching grooves 1312 opening towards the first side are uniformly provided on the second side of the annular groove 1311 along the circumference of the switching rod 131. The number of switching slots 1312 is twice that of the second state slots 1315. Each switching slot 1312 has a guide surface 1313 for moving and abutting the positioning block 132. The distance from the guide surface 1313 to the top of the switching rod 131 gradually increases along the circumference of the switching rod 131. The positioning block 132 is mounted on the housing 11 and cannot move in the extension direction of the fluid channel 111, but can rotate relative to the switching rod 131. An elastic element 133 is disposed between the switching rod 131 and the housing 11. The elastic element 133 is used to drive the switching rod 131 to move along its axial direction so that the positioning block 132 enters one of the first state slot 1314 and the second state slot 1315. When the positioning block 132 enters the first state slot 1314, the valve core assembly 12 is in the first state, and when the positioning block 132 enters the second state slot 1315, the valve core assembly 12 is in the second state.

[0055] In some embodiments, the positioning block 132 can rotate relative to the switching rod 131 in the following ways: the positioning block 132 is a moving member that rotates around the switching rod 131 to achieve relative rotation between the positioning block 132 and the switching rod 131; or the switching rod 131 is a moving member that rotates around its central axis to achieve relative rotation between the positioning block 132 and the switching rod 131.

[0056] In some embodiments, the positioning block 132 may be disposed inside the positioning ring, which is immovable in the extension direction of the fluid channel 111 and is capable of relative rotation with the switching rod 131.

[0057] Furthermore, the end of the switching lever 131 is provided with a radially outwardly extending flange 1316; the second elastic element 133 is a spring, the switching lever 131 passes through the spring, and the two ends of the spring abut against the flange 1316 and the mounting sleeve 114 respectively.

[0058] Furthermore, the number of the first state slot 1314 and the second state slot 1315 are at least two; the number of positioning blocks 132 can be one, or the same as the number of the first state slot 1314 or the second state slot 1315, and each positioning block 132 is centrally symmetrical about the switching lever 131.

[0059] To facilitate the processing of components, the switching lever 131 further includes a first rod body 131a and a second rod body 131b connected to each other. The connection between the first rod body 131a and the second rod body 131b forms an annular groove 1311. A switching groove 1312 on the first side of the annular groove 1311 is disposed in the first rod body 131a, and a first state groove 1314 and a second state groove 1315 on the second side of the annular groove 1311 are disposed in the second rod body 131b. Specifically, the first rod body 131a and the second rod body 131b can be a rod and a kit, respectively, with the rod inserted into the kit to achieve connection and form the switching lever 131.

[0060] In actual use, the automatic telescopic locking mechanism 13 is still movable along the direction of the fluid channel 111 in the first state and / or the second state. It is very easy to accidentally activate the automatic telescopic locking mechanism, causing the one-way diaphragm to move, which in turn causes the one-way closure of the fluid channel to fail.

[0061] In some embodiments, the valve 1 further includes a locking assembly 14, which includes a first component 141 and a second component 142. The first component 141 is disposed in the housing 11, and the second component 142 is disposed in the automatic telescopic locking mechanism 13. The first component 141 and the second component 142 cooperate with each other to achieve locking in a first state and / or a second state.

[0062] By providing a first component 141 on the housing 11 and a second component 142 on the automatic telescopic locking mechanism 13, the first component 141 and the second component 142 cooperate with each other to form a locking assembly 14. The locking assembly 14 can achieve locking in the first state and / or the second state, thereby reducing the probability of one-way closure failure of the fluid channel 111 caused by accidental activation of the automatic telescopic locking mechanism 13.

[0063] In some embodiments, the first component 141 includes a first switching groove 1411 and a one-way state holding groove 1412. The first switching groove 1411 extends along the moving direction of the one-way diaphragm 122. The one-way state holding groove 1412 and the first switching groove 1411 are connected, and there is an included angle between the one-way state holding groove 1412 and the first switching groove 1411. The second component 142 includes a protrusion 1421. The protrusion 1421 is slidably engaged with the first switching groove 1411 and the one-way state holding groove 1412 to achieve locking of the first state and / or the second state.

[0064] When it is necessary to switch between the first and second states, the protrusion 1421, located in the first switching groove 1411, presses against the automatic telescopic locking mechanism 13. At this time, the protrusion 1421 can slide within the first switching groove 1411. When it is necessary to lock the first and / or second states, the automatic telescopic locking mechanism 13 is rotated, and the protrusion 1421 enters the one-way state holding groove 1412. At this time, the protrusion 1421 is limited by the side wall of the one-way state holding groove 1412 in the extension direction of the fluid channel 111, so that the automatic telescopic locking mechanism 13 cannot move in the extension direction of the fluid channel 111, thereby achieving the locking of the first and / or second states.

[0065] By using a slot structure and a protrusion 1421 to form a locking assembly 14, the locking of the automatic telescopic locking mechanism 13 can be achieved relatively simply, thereby maintaining the first state and / or the second state. At the same time, by placing the slot structure on the housing 11 and the protrusion 1421 on the automatic telescopic locking mechanism 13, the impact on the structure of the housing 11 and the automatic telescopic locking mechanism 13 itself can be reduced.

[0066] Furthermore, the included angle α between the unidirectional state holding slot 1412 and the first switching slot 1411 is 90°. It should be noted that if the unidirectional state holding slot 1412 and the first switching slot 1411 are provided on a curved surface, the included angle between them is measured as the included angle when the curved surface is unfolded into a plane.

[0067] Those skilled in the art will understand that in other embodiments, the positions of the groove structure and the protrusion 1421 can be interchanged, that is, the first component 141 includes the protrusion 1421, and the second component 142 includes the first switching groove 1411 and the one-way state holding groove 1412.

[0068] In some embodiments, valve 1 includes sleeve 15, housing 11 is provided with an annular groove 112, sleeve 15 is connected to automatic telescopic locking mechanism 13, and sleeve 15 is configured to slide within annular groove 112 as automatic telescopic locking mechanism 13 extends and retracts. Annular groove 112 includes a first wall and a second wall disposed opposite to each other. The first wall is disposed between fluid channel 111 and the second wall. A first component 141 is disposed on the first wall and a second component 142 is disposed on sleeve 15.

[0069] In use, when the automatic telescopic locking mechanism 13 drives the one-way diaphragm 122 to the first / second state, the rotating sleeve 15 drives the second component 142 and the first component 141 to cooperate to achieve locking (taking the first component 141 including the first switching groove 1411 and the one-way state holding groove 1412, and the second component 142 including the protrusion 1421 as an example for further explanation: the protrusion 1421 enters the one-way state holding groove 1412 from the first switching groove 1411), thereby limiting the displacement of the automatic telescopic locking mechanism 13 in the telescopic direction, and thus maintaining the first / second state.

[0070] By placing the second component 142 on the sleeve 15 connected to the automatic telescopic locking mechanism 13, and the first component 141 on the inner wall (i.e., the first wall) of the annular groove 112 where the housing 11 and the sleeve 15 mate, the impact on the structure of the housing 11 and the automatic telescopic locking mechanism 13 itself can be reduced (for example, such a design allows the sleeve 15 to be kept at a relatively thin thickness). Furthermore, the sleeve 15 allows the user to easily lock the automatic telescopic locking mechanism 13 by rotation when they wish to maintain the first and / or second states.

[0071] Those skilled in the art will understand that, in other embodiments, the first component 141 may also be disposed on the second wall.

[0072] In some embodiments, valve 1 includes a sealing member 16 connected to an automatic telescopic locking mechanism 13. The sealing member 16 is configured to move along the extension direction of the fluid passage 111 as the automatic telescopic locking mechanism 13 extends and retracts, thereby switching between a closed state and a pass state. In the closed state, please refer to... Figure 7 The sealing member 16 and the housing 11 are sealed together to completely block the fluid passage 111. In the open state, the sealing member 16 and the housing 11 are spaced apart so that the fluid passage 111 has at least one direction in the open state. The locking assembly 14 also includes a third member 143, which cooperates with the second member 142 to achieve locking in the sealed state.

[0073] In use, when the automatic telescopic locking mechanism 13 drives the sealing component 16 to be in a sealed state, rotating the sleeve 15 drives the third component 143 and the second component 142 to cooperate and lock, thereby limiting the displacement of the automatic telescopic locking mechanism 13 in the telescopic direction and maintaining the sealed state.

[0074] By providing the sealing member 16, the fluid passage 111 can be blocked, making the entire valve 1 in a sealed state. In conjunction with the second member 142 and the third member 143 of the locking assembly 14, the sealing member 16 can be kept in the sealed position, achieving the locking of the sealed state.

[0075] In some embodiments, the third component 143 includes a second switching groove 1431 and a sealing retaining groove 1432. The second switching groove 1431 extends along the moving direction of the unidirectional diaphragm 122. The sealing retaining groove 1432 and the second switching groove 1431 are connected, and there is an included angle between the sealing retaining groove 1432 and the second switching groove 1431. The second component 142 includes a protrusion 1421, which slides in conjunction with the second switching groove 1431 and the sealing retaining groove 1432 to achieve locking of the sealed state.

[0076] In use, when the automatic telescopic locking mechanism 13 drives the sealing component 16 to be in a sealed state, the sleeve 15 is rotated, and the protrusion 1421 enters the sealing retention groove 1432 from the second switching groove 1431, thereby limiting the displacement of the automatic telescopic locking mechanism 13 in the telescopic direction and thus maintaining the sealed state.

[0077] By using a groove structure and a protrusion 1421 to form a locking component 14, the locking of the automatic telescopic locking mechanism 13 can be achieved relatively simply, thereby maintaining a sealed state. At the same time, placing the groove structure on the housing 11 and the protrusion 1421 on the automatic telescopic locking mechanism 13 can reduce the impact on the structure of the housing 11 and the automatic telescopic locking mechanism 13 itself.

[0078] Those skilled in the art will understand that the third component 143 and the first component 141 are usually disposed on the same component so as to more easily achieve simultaneous cooperation with the second component 142.

[0079] Furthermore, the second switching groove 1431 coincides with the first switching groove 1411. That is, the protrusion 1421 can move within the second switching groove 1431 / first switching groove 1411 and enter the state holding groove, the sealed holding groove 1432, etc. at different positions to achieve the maintenance of the first state / second state, the maintenance of the sealed state, etc.

[0080] Those skilled in the art will understand that other functional slots can also be provided at other positions of the second switching slot 1431 / first switching slot 1411 to lock the automatic telescopic locking mechanism 13 when the protrusion 1421 enters the slot, thereby maintaining other states, such as intermediate states.

[0081] In some embodiments, the sealing member 16 may be a sheet-like structure and connected to the end of the switching rod 131 in the automatic telescopic locking mechanism 13, and the shapes of the sealing member 16 and the fluid channel 111 are matched. Those skilled in the art will understand that the sealing member 16 may be provided with necessary sealing strips to achieve a seal with the housing 11.

[0082] In some embodiments, the sealing member 16 can replace the aforementioned flange 1316, that is, after the sealing member 16 is provided, the flange 1316 does not need to be provided separately.

[0083] Figure 10 For a cross-sectional view of the housing 11 provided in the embodiments of this application, please refer to... Figure 10 Furthermore, the housing 11 includes a mounting sleeve 114 and a housing body 113. The mounting sleeve 114 is disposed within the fluid channel 111. A section of the mounting sleeve 114 and the housing body 113 are sealed together, and a gap exists between them, forming the aforementioned annular groove 112 (i.e., the outer wall of the mounting sleeve 114 is the first wall, and the inner wall of the housing body 113 is the second wall). The positioning block 132 is fixedly connected to the inner wall of the mounting sleeve 114, and the switching rod 131 can move axially and rotatably through the mounting sleeve 114. Those skilled in the art will understand that the mounting sleeve 114 can be a split structure or a one-piece structure.

[0084] Figure 11 For a schematic diagram illustrating the fit between the sleeve 15, sealing member 16, and automatic telescopic locking mechanism 13 provided in the embodiments of this application, please refer to [link / reference needed]. Figure 11 In some embodiments, the sleeve 15 can be connected by the sealing member 16 and the automatic telescopic locking mechanism 13. In this case, the sealing member 16 and the sleeve 15 form a cup-shaped structure that is closed on one side (the side where the sealing member 16 is located) and open on the other side (towards the annular groove 112). At this time, the sealing member 16 needs to have a hole structure to communicate with the fluid channel 111, and the sealing strip is located inside the hole structure to achieve a seal in conjunction with the mounting sleeve 114 described later.

[0085] In some embodiments, there are two supports 121, which are spaced apart, and a unidirectional diaphragm 122 is disposed between the two supports 121.

[0086] Figure 12 For a structural schematic diagram of the inflatable product 2 provided in the embodiments of this application, please refer to [link / reference]. Figure 12 Based on the same inventive concept, this application also provides an inflatable product 2, which includes a body 21 and a valve 1 as described above installed on the body 21, wherein the housing 11 of the valve 1 is connected to the body 21.

[0087] The inflatable product 2 is based on the valve 1 described above. The specific contents of the valve 1 can be referred to in the above embodiments. Since the inflatable product 2 adopts some or all of the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0088] Optionally, the inflatable product 2 can be an inflatable mattress, an inflatable foam mattress, an inflatable sofa, an inflatable pool, an inflatable toy, or an inflatable pillow, etc.

[0089] The entire working process of valve 1 on the inflatable product 2 is as follows: Taking gas as an example, during inflation, the automatic telescopic locking mechanism 13 is operated to move the one-way diaphragm 122 and the support 121 relative to each other to a position that only allows gas to enter the inflatable product 2 (see [link]). Figure 4 Inflatable product 2 is inflated using an inflation tool. The gas pushes the one-way diaphragm 122 into the inflatable material, opening the channel. After inflation, the one-way diaphragm 122, due to the gas pressure inside inflatable product 2 being greater than the external atmospheric pressure, presses against the bracket 121, sealing the through-hole 1211. When rapid deflation is required, the automatic telescopic locking mechanism 13 is operated, causing the one-way diaphragm 122 and bracket 121 to move relative to each other, opening the channel and placing it in a straight-through state (see [reference]). Figure 6 When the user needs to store the inflatable, the automatic telescopic locking mechanism 13 is operated, causing the one-way diaphragm 122 and the support 121 to move relative to each other to a position that allows only gas to flow out of the inflatable (see [link]). Figure 5 The gas pressure inside the inflatable product 2 is increased by squeezing until it exceeds the external atmospheric pressure, thereby opening the channel to release the gas and minimizing the volume of the inflatable product. After squeezing stops, the gas pressure inside the inflatable product 2 is less than the external atmospheric pressure, causing the one-way diaphragm 122 to press against the support 121, forming a state where air cannot enter.

[0090] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0091] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A novel anti-backflow valve, characterized in that, The valve includes: A housing, wherein the housing is provided with a fluid channel, the fluid channel including a first air port and a second air port; A valve core assembly includes a bracket and a one-way diaphragm. The bracket has a through hole. The bracket and the one-way diaphragm are installed in the fluid channel and can move towards each other or away from each other to achieve switching between a first state and a second state. In the first state, the bracket and the one-way diaphragm are attached to and cover the through hole, and the bracket is located on the side of the attached one-way diaphragm near the first air port. The fluid channel can be unidirectionally connected in the direction from the first air port to the second air port. In the second state, the bracket and the one-way diaphragm are attached to and cover the through hole, and the bracket is located on the side of the attached one-way diaphragm near the second air port. The fluid channel can be unidirectionally connected in the direction from the second air port to the first air port. An automatic telescopic locking mechanism is installed in the fluid channel of the housing. The output end of the automatic telescopic locking mechanism is connected to the one-way diaphragm to drive the one-way diaphragm to move in opposite directions or away from the support. The unidirectional diaphragm includes a diaphragm body and a deformation part. The deformation part is configured to deform in the extension direction of the output end of the automatic telescopic locking mechanism. The deformation part is connected to the output end of the automatic telescopic locking mechanism, and the diaphragm body is connected to the end of the deformation part away from the automatic telescopic locking mechanism.

2. The novel anti-backflow valve according to claim 1, characterized in that, The main body of the diaphragm is an annular diaphragm, and the deformable part is a cup-shaped diaphragm.

3. The novel anti-backflow valve according to claim 2, characterized in that, The connection end between the cup-shaped diaphragm and the automatic telescopic locking mechanism is larger than the connection end between the cup-shaped diaphragm and the annular diaphragm.

4. The novel anti-backflow valve according to claim 2, characterized in that, The connection end between the cup-shaped diaphragm and the annular diaphragm is larger than the connection end between the cup-shaped diaphragm and the automatic telescopic locking mechanism.

5. The novel anti-backflow valve according to claim 2, characterized in that, The annular diaphragm and the cup-shaped diaphragm are integrally formed.

6. The novel anti-backflow valve according to claim 2, characterized in that, The annular membrane is a soft membrane.

7. The novel anti-backflow valve according to claim 2, characterized in that, The annular membrane is a rigid membrane.

8. The novel anti-backflow valve according to claim 2, characterized in that, The through-hole is covered by the annular diaphragm.

9. The novel anti-backflow valve according to claim 1, characterized in that, The automatic telescopic locking mechanism includes a switching rod, a positioning block, and an elastic element; The switching rod is parallel to the central axis of the fluid channel and is axially movable to fit into the fluid channel. A flow channel connecting the first air port and the second air port is provided between the switching rod and the fluid channel. An annular groove is provided on the outer wall of the switching rod along its circumference. On the first side of the annular groove, an equal number of first and second state slots with openings facing the second side are alternately provided along the circumference of the switching rod. The positioning block is movably fitted into the annular groove and can enter and exit the first and second state slots. On the second side of the annular groove, at least two switching slots with openings facing the first side are uniformly provided along the circumference of the switching rod. The number of switching slots is twice that of the second state slots. Each switching slot has a guide surface for moving against the positioning block. The distance from the guide surface to the top of the switching rod gradually increases along the circumference of the switching rod. The positioning block is installed on the housing; The elastic element is disposed between the switching rod and the housing. The elastic element is used to drive the switching rod to move along its axial direction so that the positioning block enters one of the first state slot and the second state slot. When the positioning block enters the first state slot, the valve core assembly is in the first state, and when the positioning block enters the second state slot, the valve core assembly is in the second state.

10. The novel anti-backflow valve according to claim 9, characterized in that, The deformation limit stroke of the deformable part is greater than or equal to the movement distance of the positioning block in the switching slot.

11. The novel anti-backflow valve according to claim 1, characterized in that, The number of supports is two, and the two supports are arranged at an interval, with the unidirectional diaphragm disposed between the two supports.

12. An inflatable product, characterized in that, The inflatable product includes a body and a valve of any one of claims 1 to 11 mounted on the body, wherein the housing of the valve is connected to the body.

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