Air valve cap device

Abstract

A valve cap device is applicable to a valve tube and includes an outer cover mechanism and a valve mechanism. The outer cover mechanism has a channel communicating with the valve tube. The valve mechanism includes a valve unit disposed in the channel, a guide member with a non-circular projection connected to the valve unit, and an elastic member that, together with the guide member, defines a guide opening. When the valve mechanism is in the non-inflating position, the valve unit blocks air from entering the valve tube; when in the inflating position, some air can flow through the guide opening into the valve tube. Therefore, the valve cap device can be used to inflate tires without being removed from the valve tube, which is very convenient; and the non-circular design of the guide member increases the air intake per unit time, effectively reducing inflating time.

Claims

1. A valve cover device, suitable for a valve tube having an air inlet pipe, and comprising: an outer cover mechanism adapted to be disposed in the valve tube and forming a channel for gas communication with the air inlet pipe of the valve tube; and a valve mechanism including a valve unit movably disposed in the channel of the outer cover mechanism, a guide member with a non-circular projection connected to the valve unit, and an elastic member elastically abutting against the guide member and the outer cover mechanism, the guide member and the elastic member jointly defining at least one guide opening, the valve mechanism being switchable relative to the outer cover mechanism between a non-inflating position and an inflating position, wherein in the non-inflating position, the valve unit blocks air from entering the air inlet pipe of the valve tube, and in the inflating position, the valve unit allows air to enter the air inlet pipe, and a portion of the air can flow through the guide opening and enter the air inlet pipe of the valve tube, wherein... The valve unit of the air valve mechanism includes a main rod body that is movable in the channel in a longitudinal direction, and a first valve group connected to the main rod body. The elastic member includes a compression spring disposed on the main rod body and located between the flow guide and the first valve group. When the air valve mechanism is in the air-inflating position, the compression spring and the main rod body define a flow-increasing zone that communicates with the at least one flow guide opening.

2. The valve cap device as claimed in claim 1, wherein, The outer cover mechanism includes an outer cover extending in the longitudinal direction and having an inner circumferential surface, and a support ring unit disposed in the outer cover and protruding inward from the inner circumferential surface. The inner circumferential surface and the support ring unit together define the channel. The channel has a first valve control air section with a position corresponding to the support ring unit and communicating with the flow boosting area. When the air valve mechanism is in the non-inflating position, the first valve group airtightly seals the first valve control air section.

3. The valve cap device as claimed in claim 2, wherein, The outer cover mechanism's abutment ring unit includes an abutment ring member abutting against the inner circumferential surface of the outer cover, and an airtight plug abutting against the abutment ring member and the inner circumferential surface. The abutment ring member has an inner circumferential surface. The valve unit's first valve assembly includes a first valve member connected to the main rod body, and a first airtight ring fixedly sleeved on the first valve member. When the air valve mechanism is in the non-inflated position, the first airtight ring is tightly fitted against the inner circumferential surface of the abutment ring member.

4. The valve cap device as claimed in claim 2, wherein, The valve unit of the air valve mechanism also includes a second valve group connected to the main rod and spaced apart from the first valve group in the longitudinal direction. The channel also has an air inlet that communicates with the outside and is suitable for use away from the air nozzle tube. The first valve controls the air section that is suitable for use near the air nozzle tube. When the air valve mechanism is in the non-air-pressurizing position, the second valve group airtightens the air inlet.

5. The valve cap device as claimed in claim 4, wherein, The second valve assembly of the valve unit includes a second valve member connected to the main rod body and a second airtight ring fixedly sleeved on the second valve member. When the air valve mechanism is in the non-inflating position, the second airtight ring and the second valve member together airtightly abut against the air inflating port.

6. The valve cap device as claimed in claim 5, wherein, The flow guide of the valve mechanism is connected between the second valve member of the second valve group and the main rod body, and includes a first part connected to the second valve member. The first part has a surface opposite to the second valve member. The surface has a plurality of mutually spaced abutting surface areas. The elastic member elastically abuts against the abutting surface areas and, together with the abutting surface areas, defines a plurality of flow guide openings. The projection of the first part of the flow guide in the longitudinal direction is polygonal.

7. The valve cap device as claimed in claim 6, wherein, The flow guide also includes a second part that extends from the first part toward the first valve assembly and passes through the elastic member. The projection of the second part in the longitudinal direction is located within the projection of the first part, and the top abutment area is exposed in the second part.

8. A valve cap device, suitable for a valve tube having an air inlet channel, and comprising: An outer cover mechanism, suitable for installation on a nozzle tube, includes an outer cover extending in a longitudinal direction and having an inner circumferential surface, and a support ring unit disposed in the outer cover and protruding inward from the inner circumferential surface, the inner circumferential surface and the support ring unit jointly defining a channel for gas communication with the air intake pipe of the nozzle tube, the channel having a first valve control section corresponding to the support ring unit; and a valve mechanism, including a valve unit movably disposed in the channel of the outer cover mechanism, the valve unit including a main rod movably disposed in the channel in the longitudinal direction, and a first valve assembly connected to the main rod, the valve mechanism being switchable relative to the outer cover mechanism between a non-inflating position and an inflating position, the valve mechanism in the non-inflating position, the first valve assembly airtightly sealing the first valve control section to prevent air from entering the air intake pipe of the nozzle tube, and the valve unit in the inflating position, the valve unit allowing air to enter the air intake pipe.

9. The valve cap device as claimed in claim 8, wherein, The valve unit of the air valve mechanism also includes a second valve group connected to the main rod and spaced apart from the first valve group in the longitudinal direction. The channel also has an air inlet that communicates with the outside and is suitable for use away from the air nozzle tube. The first valve controls the air section that is suitable for use near the air nozzle tube. When the air valve mechanism is in the non-air-pressurizing position, the second valve group airtightens the air inlet.

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