Search

CN-121977097-A - Novel prevent return air valve and inflatable product

CN121977097ACN 121977097 ACN121977097 ACN 121977097ACN-121977097-A

Abstract

The application relates to a novel anti-return air valve and an inflatable product, which belong to the technical field of ventilation devices, and the deformation part is arranged on a unidirectional diaphragm, so that the characteristic that the unidirectional diaphragm can be subjected to compression deformation is utilized to match the telescopic travel of an automatic telescopic locking mechanism, an elastic structure is not required to be additionally arranged on a bracket, the valve can be maintained to be well sealed, and the structural complexity of the valve is reduced.

Inventors

  • XIA YONGHUI
  • CAI ZIRUI
  • YANG JIAHUI

Assignees

  • 浙江大自然户外用品股份有限公司

Dates

Publication Date
20260505
Application Date
20260331

Claims (12)

  1. 1. Novel prevent return air valve, its characterized in that, the valve includes: the device comprises a shell, a first air inlet and a second air inlet, wherein the shell is provided with a fluid channel, and the fluid channel comprises the first air inlet and the second air inlet; The valve core assembly comprises a support and a one-way diaphragm, the support is provided with a through hole, the support and the one-way diaphragm can be installed in the fluid channel in a way of moving in opposite directions or moving away from each other to realize switching between a first state and a second state, in the first state, the support and the one-way diaphragm are attached to cover the through hole, the support is arranged on one side of the attached one-way diaphragm close to a first air port, the fluid channel can be in one-way communication along the direction from the first air port to a second air port, in the second state, the support and the one-way diaphragm are attached to cover the through hole, the support is arranged on one side of the attached one-way diaphragm close to the second air port, and the fluid channel can be in one-way communication along the direction from the second air port to the first air port; The automatic telescopic locking mechanism is arranged in the fluid channel of the shell, and the output end of the automatic telescopic locking mechanism is connected with the unidirectional diaphragm so as to drive the unidirectional diaphragm to move to realize opposite movement or separation movement with the bracket; The unidirectional diaphragm comprises a diaphragm body and a deformation part, wherein the deformation part is configured to deform in the expansion direction of the output end of the automatic expansion locking mechanism, the deformation part is connected with the output end of the automatic expansion locking mechanism, and the diaphragm body is connected with the deformation part to be away from one end of the automatic expansion locking mechanism.
  2. 2. The novel anti-backflow valve according to claim 1, wherein the diaphragm body is an annular diaphragm and the deformation portion is a cup diaphragm.
  3. 3. The novel anti-return air valve according to claim 2, wherein the connection end of the cup diaphragm and the automatic telescopic locking mechanism is larger than the connection end of the cup diaphragm and the annular diaphragm.
  4. 4. The novel anti-return air valve according to claim 2, wherein the connection end of the cup diaphragm and the annular diaphragm is larger than the connection end of the cup diaphragm and the automatic telescopic locking mechanism.
  5. 5. The novel anti-backflow valve of claim 2, wherein the annular diaphragm and the cup diaphragm are integrally formed.
  6. 6. The novel anti-backflow valve of claim 2, wherein the annular membrane is a flexible membrane.
  7. 7. The novel anti-backflow valve of claim 2, wherein the annular membrane is a rigid membrane.
  8. 8. The novel anti-blowback valve of claim 2, wherein the through hole is covered by the annular diaphragm.
  9. 9. The novel anti-backdraft valve of claim 1, wherein the automatic telescopic locking mechanism comprises a switching lever, a positioning block and an elastic member; The switching rod is parallel to the central axis of the fluid channel, the switching rod can be axially movably matched with the fluid channel, a flow channel for communicating the first air port and the second air port is arranged between the switching rod and the fluid channel, an annular groove is formed in the outer wall of the switching rod along the circumferential direction of the switching rod, first state grooves and second state grooves which are the same in number and are opened towards the second side are alternately formed in the first side of the annular groove along the circumferential direction of the switching rod, the positioning block is movably matched with the annular groove and can enter and exit the first state grooves and the second state grooves, at least two switching grooves which are opened towards the first side are uniformly formed in the second side of the annular groove along the circumferential direction of the switching rod, the number of the switching grooves is twice that of the second state grooves, the switching grooves are provided with guide surfaces for movably abutting against the positioning block, and the distance from the guide surfaces to the top end of the switching rod is gradually increased along the circumferential direction of the switching rod; The positioning block is arranged on the shell; The valve core assembly is arranged between the switching rod and the shell, the elastic piece is used for driving the switching rod to move along the axial direction of the switching rod so that the positioning block enters one of a first state groove and a second state groove, when the positioning block enters the first state groove, the valve core assembly is in a first state, and when the positioning block enters the second state groove, the valve core assembly is in a second state.
  10. 10. The novel anti-return air valve according to claim 9, wherein a deformation limit stroke of the deformation portion is greater than or equal to a movement distance of the positioning block in the switching groove.
  11. 11. The novel anti-return air valve according to claim 1, wherein the number of the brackets is two, the two brackets are arranged at intervals, and the unidirectional membrane is arranged between the two brackets.
  12. 12. An inflatable product comprising a body and the valve of any one of claims 1 to 11 mounted to the body, the housing of the valve being connected to the body.

Description

Novel prevent return air valve and inflatable product Technical Field The application relates to the technical field of ventilation devices, in particular to a novel anti-return air valve and an inflatable product. Background The inflatable product is light and easy to use, so that the inflatable product can be suitable for many scenes in life. Among them, the self-inflating products (such as self-inflating mattresses) made of resilient materials (such as sponges) have better convenience and are increasingly favored by people because of no need to perform inflating operations. However, when the self-inflating product is stored and exhausted, the self-inflating product is easy to generate back air to expand, so that the self-inflating product is difficult to store. At present, the problem that the self-inflating product is easy to generate air return expansion when being stored is solved by adopting a mode of arranging two opposite check valves, a valve with the check valves capable of being installed reversely, a valve with a reversible valve core and the like. The use of two opposite check valves is generally costly and takes up a relatively large volume. The mode of adopting the check valve to install reversely reduces the number of the check valves, but the whole structure is more complex, and the product integrity is not strong. The valve core can be turned over, so that the number of the one-way valves can be reduced, the requirements of simpler structure and stronger integration can be met, but the valve core is turned over by a user with fingers penetrating into the valve, and the valve core is difficult to turn over. Disclosure of Invention In order to solve the problem of difficult overturning of the valve core on the condition that the valve core meets the requirements of simpler structure and stronger integration, a support and a unidirectional diaphragm which can move oppositely and away from each other are arranged in a fluid channel to realize the direction switching of the unidirectional closed fluid channel (for convenience of explanation, the states of the two unidirectional closed fluid channels, namely a unidirectional air inlet state and a unidirectional air outlet state, are recorded as a first state and a second state), and an automatic telescopic locking mechanism is adopted to drive the unidirectional diaphragm to move. However, the telescopic travel of the output end of the automatic telescopic locking mechanism is larger than the distance between the position of the output end of the automatic telescopic locking mechanism in the first state and the position of the output end of the automatic telescopic locking mechanism in the second state, namely, when the first state and the second state are switched, the output end of the automatic telescopic locking mechanism still continues to stretch a certain distance and then retracts to the position of the first state or the second state after reaching the position of the first state or the second state, so that in actual use, an elastic structure is arranged on the support to match the process, and the support is attached to the unidirectional membrane. However, this arrangement increases the risk of air leakage and increases the structural complexity of the valve. The embodiment of the application aims to provide a novel anti-return air valve and an inflatable product, which can match the telescopic travel of an automatic telescopic locking mechanism on the premise of not additionally arranging an elastic structure on a bracket. According to the embodiment of the application, the novel anti-return air valve comprises a shell, a valve core assembly and an automatic telescopic locking mechanism, wherein the shell is provided with a fluid channel, the fluid channel comprises a first air port and a second air port, the valve core assembly comprises a support and a unidirectional diaphragm, the support is provided with a through hole, the support and the unidirectional diaphragm can move in the fluid channel in opposite directions or in opposite directions, the support and the unidirectional diaphragm are mounted in the fluid channel in a mode of switching between a first state and a second state, the support and the unidirectional diaphragm are attached to cover the through hole, the support is arranged on one side of the attached unidirectional diaphragm close to the first air port, the fluid channel can be unidirectionally communicated in the direction from the first air port to the second air port, the support and the unidirectional diaphragm are attached to one side of the second air port, the fluid channel can unidirectionally communicate in the direction from the second air port, the automatic telescopic locking mechanism is mounted in the fluid channel of the shell, the output end of the automatic telescopic locking mechanism is connected with the unidirectional diaphragm to move so as to realize opposite directions or in opposite dir