Endoscopic Fluid Control Valve And Endoscope Thereof

摘要

Embodiments of the present invention provide an endoscopic fluid control valve. By having just one fluid outlet, the structure of the endoscopic fluid control valve is made simpler with interior space saving. There is no need for a one-way check valve at an operational portion of the endoscope to prevent fluid backflow, and this makes it easy to clean. An embodiment includes valve housing, valve stem, valve core, elastic component, button, first seal, second seal, third seal, fourth seal, gas inlet, fluid inlet and fluid outlet.

主权项

1. An endoscopic fluid control valve, comprising:
a valve housing; a valve stem; a valve core; an elastic component; a button; a first seal; a second seal; a third seal; a fourth seal; a gas inlet; a liquid inlet; and a fluid outlet, wherein the valve housing contains the valve stem, the valve core, the elastic component, the first seal, the second seal, the third seal and the fourth seal therein, wherein the valve housing includes following parts arranged in an order as listed from top to bottom: a thick section with a larger diameter and a thin section with a smaller diameter, wherein the gas inlet, the fluid outlet and the liquid inlet are arranged and on the valve housing in a sequential order from top to bottom, with the gas inlet disposed on the thick section of the valve housing and with the fluid outlet and the liquid inlet disposed on the thin section of the valve housing, wherein the valve stem comprises a first through hole which has an upper end and a lower end, wherein the upper end of the first through hole is connected to the button, wherein the lower end of the first through hole includes a vertical section connected to an upper end of the valve core, wherein the lower end of the first through hole also includes a horizontal section traversing through the valve stem, and wherein the horizontal section is disposed height- wise between the gas inlet and the fluid outlet, wherein the valve core is contained within the valve stem and comprises a lower end and the upper end, wherein the lower end of the valve core is connected to an upper end of the elastic component, wherein the upper end of the valve core detachably forms an airtight connection with the lower end of the first through hole, wherein the elastic component is contained within the valve stem and comprises the upper end and a lower end, wherein the upper end of the elastic component is elastically connected to the lower end of the valve core, and wherein the lower end of the elastic component is connected to a bottom end of the valve stem, wherein the button is disposed at a top portion of the endoscopic fluid control valve and is connected to the vertical section of the first through hole, and wherein the button is configured with one or more pores connecting the first through hole with outside atmosphere, wherein the first seal, the second seal, the third seal and the fourth seal are each an annular elastic object surrounding an outer wall of the valve stem and arranged sequentially from top to bottom, wherein the first seal is disposed height-wise between the button and the gas inlet and hermetically abuts an inner wall of the thick section of the valve housing, wherein the second seal is disposed height-wise between the first seal and the horizontal section of the first through hole and forms a gap with the inner wall of the thick section of the valve housing, wherein during operation of the button the second seal moves downward along with the valve stem to hermetically abut with either the intersection of the thick section and the thin section of the valve housing or an inner wall of the thin section, wherein the third seal is disposed height-wise between the horizontal section of the first through hole and the fluid outlet and hermetically abuts the inner wall of the thin section of the valve housing, and wherein the fourth seal is disposed height-wise between the liquid inlet and the fluid outlet and hermetically abuts the inner wall of the thick section of the valve housing, and wherein the valve stem includes a second through hole horizontally traversing the valve stem and disposed above the fourth seal and below a connection between the lower end of the first through hole and the valve core.