is a slot 32 for receiving a tang 34 formed on a boss 36 which boss has an opening 38 formed therein on the end thereof opposed to the tang 34 for conventionally receiving a leg of a bimini frame not shown the tang 34 has a transverse opening 40 therein in registration with in line openings 42 formed in the outer end 31 of the intermediate member 30 and a pivot pin 41 is received in the openings 40 and 42 to pivotly mounting the boss 36 onto the intermediate member 30 a shoulder 46 is formed on the intermediate member 30 at the top of the depending portion 28 which shoulder abuttingly engages for relative rotation the top of the upper base portion 14 to limit further inward movement of the depending portion 28 into the base member 14 the intermediate member 30 has a slot 48 formed therein in which is received a latching lever 50 the latter being mounted on a pivot pin 52 mounted in a boss 54 formed in the intermediate member the latching lever 50 is generally u201c y u201d shaped and has an opening 56 therein receiving the pivot pin 52 and as seen in fig2 4 and 5 its right arm 58 is engageable with a shoulder 60 formed on the intermediate member 30 for limiting counterclockwise rotation of the lever 50 relative thereto to the position seen in fig5 the left arm 62 of the lever 50 projects from the slot 48 of the intermediate member 30 so that it may be pressed on to cause the lever 50 to rotate clockwise from its position seen in fig5 to the.