Schrader valve and Presta valve dual-purpose tuyere head

Abstract

The invention discloses a Schrader valve and Presta valve dual-purpose tuyere head. The Schrader valve and Presta valve dual-purpose tuyere head is composed of a shell, a rotation piece, a valve seat and a spring. A shaft hole is formed in the shell in a penetrating mode, and a first assembly portion and a second assembly portion are arranged on the periphery of the shell, wherein the first assembly portion is used for threaded connection of a high-pressure gas cylinder and the second assembly portion is used for being matched with an inflator. The rotation piece is arranged in the shaft hole in a pivoted mode through a shaft portion, a first threaded connection hole allowing a Presta valve to be inserted in an airtight mode is formed in one end of the rotation piece, a second threaded connection hole allowing a Schrader valve to be inserted in an airtight mode is formed in the other end of the rotation piece, a containing space is communicated between the first threaded connection hole and the second threaded connection hole, and a through hole communicating the inner part of the containing space and the outer part of the containing space is formed between the first threaded connection hole and the second threaded connection hole. The valve seat moves between a first position and a second position along the containing space. When the valve seat is located at the first position, the through hole is communicated with the first threaded connection hole. When the valve seat is located at the second position, the through hole is communicated with the second threaded connection hole. The spring is used for providing preset elastic force to the valve seat to enable the valve seat to have the trend of being located at the first position at any time. Through the structure, the Schrader valve and Presta valve dual-purpose tuyere head is compatible to the external inflator or the external high-pressure gas cylinder, has a return stopping effect, and therefore the situation that a large amount of gas leaks out from a piece to be inflated is effectively improved.

Description

technical field [0001] The invention relates to an air nozzle head of an inflatable device, in particular to a dual-purpose air nozzle head of an American nozzle and a French nozzle. Background technique [0002] The prior art is just as shown in the inventor’s application for filing in Taiwan, China No. 201213168: Dual-purpose air nozzles for American and French nozzles. The patent’s previous patent has a relatively simple structure, small size, and will not loosen during use. And other advantages, when in use, only need to directly plug in the American nozzle or French nozzle, without additional manual switch, you can directly treat the inflatable parts (such as tires) through the handheld pump or high-pressure gas cylinder connected to the hose. Gas filling is indeed a quick operation and convenient design, so it is welcomed by the market. [0003] However, this patent application still has the following room for improvement: [0004] 1. After actual testing, it is foun...

AI Technical Summary

Problems solved by technology

[0004] 1. After actual testing, it is found that the hose is not compatible with external pumps or high-pressure gas cylinders. You can only choose one of the factory settings, and the advantages and disadvantages of pumps and high-pressure gas cylinders are different. In this way, This makes it impossible for users to choose the most suitable operation mode for their own filling, and it has the disadvantage of insufficient flexibility.

[0005] 2. Furthermore, if the prior patent image 3 As shown, it inserts the French mouth of the part to be inflated during operation, and then starts the pump. However, when the user has not started the pump, the existing air pressure inside the part to be inflated will be directly passed through the soft Although a large amount of gas is released, the same situation will also occur in the American-style nozzle, but the diameter of the French-style nozzle is larger than that of the ordinary American-style nozzle, so the instantaneous pressure release is more serious. Doubling the trouble with inflating

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