Schrader valve and Presta valve combined valve head

Abstract

The invention relates to a Schrader valve and Presta valve combined valve head, which comprises a casing, a rotation part, two O-shaped seal rings and a ball. The casing is provided with a shaft hole, the lateral side of the casing extends outwards to form an end, and the end is provided with a through hole communicated with the shaft hole. The rotation part is provided with a body held in the shaft hole of the casing, two ends of the body are provided with two head respectively, the two heads are arranged outside the casing, two screwing holes connected with a Schrader valve and a Presta valve in a screwed manner are arranged by being inserted in from the outer end faces of the two heads respectively, a holding space is arranged in the middle of the body of the rotation part, the holding space is communicated with the two screwing holes through two through holes, an annular groove is reserved on the outer wall surface of the body of the rotation part in a recessed manner to form an annular air channel which is communicated with the through hole at the end of the casing, and a via hole is arranged on the body of the rotation part at the position of the annular groove and is used for communicating the annular air channel with the holding space. The two O-shaped seal rings are arranged on the body of the rotation part and on two sides of the annular groove. The ball is held in the holding space, semispherical or approximately-semispherical sockets are formed at the positions, communicated with the two through holes, of the inner wall surface of the holding space, and the radius of the ball is smaller than that of each socket and larger than that of each of the two through holes.

Description

technical field [0001] The present invention relates to the tuyere head of an inflatable device, in particular to a dual-purpose tuyere head for an American style mouth and a French style mouth. Background technique [0002] At present, there are two types of common tire nozzles: Schrader Valve and Presta Valve. Schrader Valve is generally used on tires of automobiles, motorcycles and ordinary bicycles, and its outer diameter is 8mm. Commonly found on road racing bikes, the French mouth is slender with an outer diameter of 6mm. The two types of nozzles cannot share one type of nozzle head due to their different outer diameters and structures. In order to solve this problem, a dual-purpose nozzle head has appeared on the market, which is to install an American nozzle and a French nozzle side by side at one end of the nozzle head, and set a wrench at the other end of the nozzle head to connect the nozzle to be inflated. After the air nozzle, pull the wrench to squeeze the ru...

AI Technical Summary

Problems solved by technology

The structure of the aforementioned dual-purpose air nozzle head is relatively complex, the volume is large, and the operating space is also required to be large during use. The air nozzle is held by the deformation of the rubber tube, which causes the problem that it is easy to loosen during operation.

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