Patent ID: 8567092

Claim:
A ventilation sole for footwear, comprising: an air inlet-outlet formed at a side of the ventilation sole; vents formed at an upper portion of the ventilation sole, the vents communicating with the air inlet-outlet; a device for opening and closing the air inlet-outlet, the device being coupled with the air inlet-outlet for supplying ambient air into the footwear, wherein the device for opening and closing the air inlet-outlet comprises: a main cap having an axial through opening formed there-through; a button cap inserted in the axial through opening of the main cap, the button cap defining an axial air flow passage there-through and having a distal end portion exposed through the air inlet-outlet, the distal end portion adapted to be rotated by a user to axially move the button cap between a locked position and an unlocked position while rotating about a center axis of the button cap; an elastic stopper inserted in the axial through opening of the main cap, wherein the elastic stopper having a distal end portion abutting a proximal end portion of the button cap, and having air inlet-outlet passages formed therein to communicate with the axial air flow passage of the button cap, wherein the elastic stopper is supported by a spring and axially moveable to elastically advance and retreat in response to the axial movement of the button cap between said locked position and said unlocked position; and an elastic stopper holder disposed inside the axial through opening of the main cap, wherein the elastic stopper holder has an axial inner opening, and the elastic stopper is slidably received in the axial inner opening, and wherein the elastic stopper holder is sealably coupled with the elastic stopper via a sealing member to close air flow between the axial air flow passage of the button cap and the air inlet-outlet passages of the elastic stopper when the elastic stopper is retreated as the button cap is in the unlocked position, and a seal between the elastic stopper and the elastic stopper holder is released to open the air flow between the axial air flow passage of the button cap and the air inlet-outlet passages of the elastic stopper when the elastic stopper is advanced as the button cap is in the locked position.