CN2303138Y

CN2303138Y - Bicycle tyre's inside valve

Info

Publication number: CN2303138Y
Application number: CN 96250297
Authority: CN
Inventors: 姚陈和
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-28
Filing date: 1996-12-28
Publication date: 1999-01-06
Anticipated expiration: 2006-12-28

Abstract

The utility model discloses a bicycle air valve used on a bicycle tire, which is mainly composed of an air valve body, an inflating port and an air inlet. The utility model is characterized in that the other end of the air valve body is provided with air return hole, and a hollow cavity is arranged between the air inlet and the air return hole. A piston is arranged in the hollow cavity. The bicycle air valve does not need to be sealed by a rubber hose. The utility model has the advantages of simple structure, good sealing effect and long service life, and the utility model can substitute a common air valve to be used on various bicycles.

Description

Bicycle valve core

The utility model is the valve inside on a kind of bicycle valve cock, belongs to the accessory of bicycle tyre.

The valve cock of bicycle seals on valve inside by a slat gum tube socket at present.But rubber hose will wear out after not only using a period of time, and thermo-labile, and temperature Gao Shiyi is softening damaged, and hardening deforming when temperature is low causes sealing to descend.When reality is used bicycle, often cause the bicycle gas leak phenomenon because of the sealing of valve cock is bad, very inconvenient.Chinese patent 94205550.0 provides a kind of novel bicycle valve cock, this valve cock has one groove and cover to load onto a leakproof cushion rubber in the suction tude external process, and at endoporus dustproof steel ball is housed and withstands air inlet and reach the leakproof purpose.It is bigger that but this valve cock is changed, and complex structure is difficult to promotion and implementation.

The purpose of this utility model is: a kind of bicycle valve core of simple in structure, good sealing effect is provided, overcomes short defective in working life.

Of the present utility model being constructed as follows: bicycle valve core comprises the inflation inlet of core body, core body one end and the inlet hole at core body middle part, and the other end of core body is provided with return-air hole, and a cavity is arranged between inlet hole and return-air hole, and piston is set in the cavity.This valve inside does not need rubber hose just salable.When tyre inflation, air-flow will be from inflation inlet in inlet hole enters tire, and at this moment, the piston in the cavity is displaced downwardly to core body return-air hole place in the effect of air pressure.After tyre inflation finished, the air pressure at air-filled pore place was reduced to normal atmosphere (An), and the air pressure at return-air hole place is because of communicating with inside tires, much larger than barometric pressure, so piston is displaced downwardly to air inlet position in the effect of draught head, seals the inlet hole aperture, thereby reaches sealing purpose.

Major advantage of the present utility model is:

(1) overall structure is constant substantially, implements to be easy to;

(2) adopt piston seal, sealing effect is better;

(3) valve inside does not need rubber hose, and can prolong greatly working life.

The contrast accompanying drawing describes the utility model in detail below.

Fig. 1 is the cross-sectional schematic of bicycle valve core.

Among the figure, 1, core body; 2, inflation inlet; 3, inlet hole; 4, return-air hole; 5, cavity; 6, piston; 7, rubber seal; 8, convex shoulder.

As shown in the figure, valve inside be a hollow the garden column structure, adopt metallic material to make.Inflation inlet (2), inlet hole (3) and return-air hole (4) are arranged on the core body (1).Core body (1) between inflation inlet (2) and inlet hole (3) outside is provided with rubber seal (7), is used for improving pack into sealability behind the valve cock of valve core body.In addition, core body (1) outside also has convex shoulder (8), plays the role of positioning.One cavity (5) is arranged in the front portion of valve inside, piston (6) is set in the cavity (5).In the present embodiment, piston (6) adopts rubber to make, and makes the sealability of valve inside better.When this valve inside was made, outside dimensions can be consistent with common valve inside, and can directly be substituted on the common bicycle valve cock.Use this valve inside, laborsaving when inflation, and the sealing time is enhanced about more than once.Under normal circumstances, will reach four to five years working life.

Claims

1, a kind of bicycle valve core, comprise the inflation inlet (2) of core body (1), core body (1) one end and the inlet hole (3) at core body (1) middle part, the other end that it is characterized in that core body (1) is provided with return-air hole (4), between inlet hole (3) and return-air hole (4), a cavity (5) is arranged, piston (6) is set in the cavity (5).

2, bicycle valve core according to claim 1 is characterized in that core body (1) outside between inflation inlet (2) and inlet hole (3) is provided with rubber seal (7).

3, bicycle valve core according to claim 1 and 2 is characterized in that described piston (6) adopts rubber to make.