Umbrella having built-in waterproof case

An umbrella having a built-in waterproof case, in which a space is formed inside an umbrella handle (2) of an umbrella (1) so that the umbrella (1) including an umbrella shaft (11) can be inserted therein, the umbrella comprising:

• a fixed handle part (21) having a regular polygonal column shape as a whole, and including a locking part (211) configured to extend in a stepped form at a lower end thereof and to have a circular cross section, an umbrella shaft insertion depression (212) formed in a center of a top surface thereof and configured such that a lower end of the umbrella shaft (11) of the folding umbrella (1) is inserted and fixed thereto, a rotation guide groove (213) depressed in a circular ring shape around the umbrella shaft insertion depression (212), and a first ball seating groove (214) formed by being depressed in a semicircular shape along a middle of an inner circumferential surface of the rotation guide groove (213);
• a rotating handle part (22) having a same regular polygonal column shape as the fixed handle part (21), and including a rotation guide protrusion (221) inserted into the rotation guide groove (213) below it, a second ball seating groove (222) depressed in a semicircular shape at a position corresponding to the first ball seating groove (214) of the rotation guide protrusion (221), a plurality of bearing balls (223) inserted into a space formed by the first and second ball seating grooves (214 and 222), and an O-ring (224) mounted in a groove formed along a top of an outer circumferential surface;
• a sliding handle part (23) configured such that a center thereof is hollow in a regular polygonal shape corresponding to that of the fixed handle part (21) and the rotating handle part (22) and four guide grooves (231) extending spirally in one rotation direction downward from a top and four semicircular seating grooves (232) formed at ends of the guide grooves (231) are radially formed at regular intervals along an inner circumference thereof;
• and
• an umbrella top (24) mounted in a center of a top end of the umbrella (1), configured such that four hemispherical protrusions (241) formed along an edge of a lower end and configured to be seated in the semi-circular seating grooves (232) through the guide grooves (231) and a waterproof ring (242) mounted below the hemispherical protrusions (241) are formed, and adapted to be selectively attached to and detached from the sliding handle part (23).