Operative hinge for opening/closing body

An operative hinge for use with an opening/closing body, comprising:

• a fixing cylinder for installation to a toilet bowl body;
• a pair of hinge cases to be installed removably to the right and left, respectively, of the fixing cylinder;
• a rotating shaft provided rotatably within each hinge case to support the opening/closing body, each rotating shaft having a non-circular hole;
• a seat lid and seat of the toilet bowl fixed to each rotating shaft by coupling pins tightly inserted into each non-circular hole of said each rotating shaft;
• a stationary cam fixed within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated;
• a cam provided within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated to be slidable on, and rotatable with, the rotating shaft;
• and
• a resilient means for urging the rotatable sliding cam toward the stationary cam, the hinge further comprising, to control the rotation of the rotating shaft;
• a damping means consisting of:
• a rubber ring fitted on the rotating shaft and interposed between the outer surface of the rotating shaft and the inner wall of the hinge case;
• and
• a viscous oil applied between the outer surface of the rubber ring and inner wall of the hinge case;
• the rubber ring having recesses formed on the outer surface thereof.

An operative hinge for use with an opening/closing body, comprising:

• a fixing cylindrical body for installation a toilet bowl body;
• a pair of hinge cases to be installed removably to the right and left, respectively, of the fixing cylindrical body;
• a shaft provided rotatably within each hinge case to support the opening/closing body, each rotating shaft having a non-circular hole;
• a seat lid and seat of the toilet bowl fixed to each rotating shaft by coupling pins tightly inserted into each non-circular hole of said each rotating shaft;
• a stationary cam fixed within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated;
• a cam provided within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated to be slidable on, and rotatable with, the rotating shaft;
• and
• a resilient means for urging the rotatable sliding cam toward the stationary cam, wherein,
• the seat lid has a pair of seat lid bases, one of the seat lid bases being engaged with one of the coupling pins, and the other of the seat lid bases rotatable mounted on the other of the coupling pins;
• and
• the seat having a pair of seat bases, one of the seat bases being rotatable mounted on said one of the coupling pins, and the other of the seat bases engaged with said other of the coupling pins;
• the hinge further comprising, to control the rotation or the rotating shaft;
• a damping means consisting of:
• a rubber ring fitted on the rotating shaft and interposed between the outer surface of the rotating shaft and the inner wall of the hinge case;
• and
• a viscous oil applied between the outer surface of the rubber ring and inner wall of the hinge case;
• the rubber ring having recesses formed on the outer surface thereof.