CN2113391U

CN2113391U - Air valve needle

Info

Publication number: CN2113391U
Application number: CN 91218435
Authority: CN
Inventors: 李豪杰
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-17
Filing date: 1991-07-17
Publication date: 1992-08-19

Abstract

The utility model relates to an air valve needle. The cavity of air valve need bracket is in the shoulder-step frame, the shoulder-step part is equipped with a movable seal gasket to form a new single-direction valve frame, and the lower part of the air valve needle bracket is equipped with a seal ring. The air valve needle with the mentioned-above features can avoid the shortcomings of the fragile rubber ring of old air valve needles, thus, the utility model has the advantages of durable use, strength saving when inflating with pump, and good seal performance.

Description

Air valve needle

The utility model refers in particular to compact car tyre valve pins such as bicycle, tricycle about a kind of Tyre air valve.

Existing Tyre air valve also claims on the plunger structure it all is to adopt rubber band to be enclosed within pin hole place, plunger valve seat lower end to constitute one-way valve structures, utilizing the rubber band expansion to lose heart reaches to the tyre inflation purpose, this moment, rubber band was double to seal, because wearing and tearing are more serious in the rubber band gas replenishment process, often need to change rubber band and just can avoid the phenomenon that has a flat tire.

The purpose of this utility model is will overcome the deficiency that prior art exists and plunger that a kind of different one-way valve structures are provided, can overcome old plunger long defective in working life.

Tool shoulder stage structure in this plunger valve seat cavity, place, shoulder rank is provided with floating packing and constitutes one-way valve structures, and seal ring is established in plunger valve seat lower end.

Plunger with said structure feature has overcome old plunger rubber band defective easy to wear, and durable in use, more laborsaving when the tool inflator is inflated, sealability is fair, seals if having drop residual gas air pressure, sealing gasket one-way valve just can reach fully in the tire.

Further set forth the utility model below in conjunction with description of drawings, provide embodiment simultaneously.

Fig. 1 is a plunger structure sectional view.

As shown in the figure, sealing gasket (2) is located at place, shoulder rank in plunger valve seat (1) cavity, and the shoulder rank preferably adopt conical surface seal to cooperate with floating packing (2).And the seal ring (3) that plunger valve seat (1) lower end is provided with is preferably the circle tubular construction, closely be enclosed within the inner chamber of plunger valve seat (1) lower end, the following shoulder rank that form are suspended in valve seat (1) cavity sealing gasket (2), certainly, seal ring also can be located at valve seat (1) outer ring, lower end, take for sealing gasket (2) dress this moment and make things convenient for plunger valve seat (1) can be set as disome and be threaded, the joint forms naturally descends to take on rank sealing gasket (2) is suspended in valve seat (1) cavity.

Claims

1, a kind of plunger that is used for the tire air inlet is characterized in that tool shoulder stage structure in plunger valve seat (1) cavity, and place, shoulder rank is provided with floating packing (2) and constitutes one-way valve structures, and plunger valve seat (1) lower end is provided with seal ring (3).

2,, it is characterized in that the shoulder rank adopt conical surface seal to cooperate with floating packing (2) in plunger valve seat (1) cavity according to the described plunger of claim 1.

3,, it is characterized in that seal ring (3) for the circle tubular construction, closely is enclosed within plunger valve seat (1) lower end inner chamber, and form shoulder rank down according to claim 1 or 2 described plungers.