ROTARY FASTENER

摘要

A rotary fastener includes a mounting base member including an inner barrel and an outer barrel fixedly fastened together, a fastening device including a spring-loaded pin member inserted through the mounting base member and a head member affixed to the pin member outside the mounting base member, an operating cap member fixedly mounted with the head member and rotatable relative to the mounting base member between an upper-limit position and a lower-limit position to move the pin member in and out of the bottom side of the mounting base member between a locking position and an unlocking position, and a guide track unit for guiding movement of the operating cap member relative to the mounting base member between the upper-limit position and the lower-limit position upon a rotary motion.

主权项

1. A rotary fastener installed in a mounting through hole of a first panel member and adapted for detachably locking said first panel member to a locking hole of a second panel member, the rotary fastener comprising:
a mounting base member comprising an inner barrel and an outer barrel molded on said inner barrel by insert molding, said inner barrel comprising an accommodation chamber defined therein, a top neck located at a top side thereof and upwardly extended out of said outer barrel and a bottom mounting neck located at an opposing bottom side thereof and affixed to said mounting through hole of said first panel member; a fastening device, said fastening device comprising a head member disposed outside said mounting base member, a pin member having a top end thereof upwardly inserted through said accommodation chamber of said inner barrel of said mounting base member and fixedly connected to said head member and an opposing bottom end thereof terminating in an expanded bottom engagement portion that is adapted for engaging into said locking hole of said second panel member to lock said second panel member to said first panel member, and an elastic member mounted around said pin member and stopped between said expanded bottom engagement portion of said pin member and a part of said inner barrel in said accommodation chamber; an operating device, said operating device comprising an operating cap member fixedly mounted with said head member of said fastening device and supported on said outer barrel of said mounting base member and rotatable by an external force relative to said outer barrel between a lower-limit position and an upper-limit position to move said pin member between a locking position where said expanded bottom engagement portion of said pin member is engaged into said locking hole of said second panel member to lock said second panel member to said first panel member and an unlocking position where said expanded bottom engagement portion of said pin member is disengaged from said locking hole of said second panel member and received inside said accommodation chamber of said inner barrel for allowing separation between said first panel member and said second panel member; and a guide track unit located at a bottom side of said operating cap member and a top side of said outer barrel of said mounting base member and adapted for guiding said operating cap member to move relative to said outer barrel of said mounting base member between said upper-limit position and said lower-limit position through a rotary motion.