| 摘要 |
<p>PURPOSE: A valve core is provided to reduce the number of parts, to restrict the wear between the sealing member and the core mounting hole, and to improve sealing efficiency by rotating the first body part to the second body part. CONSTITUTION: A valve core(10) for opening and closing a core mounting hole is composed of a cylindrical core body(11) fastened to the core mounting hole and made of metal having the hardness different from the hardness of the inner wall of the core mounting hole, a driving shaft(20) moved by penetrating the core body and made of metal having the hardness different from the hardness of the core body, a lid part integrally formed in the driving shaft to open and close the opening end of the core body, a press unit pressing the driving shaft to close the opening end by the lid part, a body position decision contact part formed outside the core body and contacted to the inner wall of the core mounting hole to seal the clearance between the outside of the core body and the inner wall of the core mounting hole by metal, and a contact taper part formed in the lid part and contacted to the inner edge of the opening end of the core body to seal the clearance between the lid part and the opening end.</p> |
