Rotate-to-press inflation adaptor for English valves

A rotate-to-press inflation adaptor for use with an English valve, comprising:

• a valve connector, which comprises a side surface that is inwardly recessed to form a positioning cavity extending in a direction from outside to inside, the valve connector having an end in which a valve opening is formed to extend inwardly in an axial direction to communicate with the positioning cavity, the valve connector having an opposite end in which a coupler opening is formed to extend inwardly in the axial direction to communicate with the positioning cavity, the positioning cavity having two opposite side walls in which two slide channels are respectively formed and extending in the axial direction;
• a coupler, which comprises a coupler body and an air charging hole extending in the axial direction through the coupler body, the coupler body comprising an external thread and two slide blocks formed thereon, the slide blocks being slidably received in the slide channels of the valve connector respectively so as to be reciprocally movable along the slide channels;
• a rotary knob, which comprises a knob body and an internal thread formed in and arranged to extend in the axial direction through the knob body, the knob body being combinable with the valve connector in a manner of being rotatable with respect thereto, the internal thread of the rotary knob being in engagement with the external thread of the coupler;
• and
• an air tube, which is connected to the coupler.