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1. A quick installation hinge seat of a closestool cover plate, comprising two hinge shafts to be mounted in shaft sleeves at two sides of a rear end of the cover plate, two support seats for connecting with a closetool, the hinge shafts each having a radial pin hole for connection of a pin provided on each of the support seats, a button switch mounted between the two hinge shafts to control the pin to be in or out of the pin hole; the button switch comprising a hinge pipe having two ends connected to the two hinge shafts, a button seat secured in a middle portion of the hinge pipe, a lock control rod which is axially inserted in the button seat and slidable in the button seat in a radial direction of the hinge pipe, a spring disposed between the button seat and the lock control rod, and a button mounted on the button seat and holding against the lock control rod; the button being exposed out of a button installation hole at the middle portion of the hinge pipe, two ends of the lock control rod being axially inserted in the two hinge shafts respectively and slideable radially, each of the two ends of the lock control rod having a locking plate and an unlocking plate, the locking plate and the unlocking plate being arranged in a stagger manner, the pin having an annular locking groove and an annular unlocking groove thereon, the locking plate being adapted to engage with the locking groove, the unlocking plate being adapted to disengage from the unlocking groove; a resilient trigger device provided between the button seat and the button for the button to be self-locking in a pressed state, wherein when the button is self-locking, the locking plate disengages from the locking groove and the unlocking plate engages with the unlocking groove,
wherein the button comprises a guide rod composed of two resilient plates and deformable radially, each resilient plate having a conical barb portion at a distal end thereof, the button seat having a circular hole for resilient connection of the guide rod, the guide rod and the circular hole constituting the resilient trigger device, when the guide rod is inserted in the circular hole and the barb portion engages with an end surface of the circular hole, the resilient trigger device forms a self-locking state relative to the button, when the guide rod disengages from the end surface of the circular hole, the resilient trigger device releases the self-locking state relative to the button and the button is returned. |
