Windproof umbrella

Abstract

A windproof umbrella includes a shank ( 10 ); a runner ( 12 ) on the shank ( 10 ); ribs ( 20 ); a canopy ( 101 ); stretchers ( 30 ); U-shaped first joints ( 51 ) each secured onto the rib ( 20 ); U-shaped second joints ( 61 ) each slidably put on the rib ( 20 ); U-shaped third joints ( 71 ) each secured onto the stretcher ( 30 ); auxiliary rods ( 40 ); and sets of first, second, and third pivotal members ( 52, 62 , and 72 ). The first pivotal member ( 52 ) is formed at the other end of the stretcher ( 30 ) and is pivotably connected to the first joint ( 51 ). The second pivotal member ( 62 ) is formed at one end of the auxiliary rod ( 40 ) and is pivotably connected to the second joint ( 61 ). The third pivotal member ( 72 ) is formed at the other end of the auxiliary rod ( 40 ) and is pivotably connected to the third joint ( 71 ). In response to strong wind, the second joint ( 61 ) slides to change an angle between the rib ( 20 ) and the stretcher at the first joint ( 51 ). Therefore, the wind escape capability of windproof umbrella ( 1 ) of the invention is greatly increased.

1 . A windproof umbrella comprising:
 a shank ( 10 ) having an upper hub ( 11 ) and a lower runner ( 12 ) slidably put on the shank ( 10 );   a plurality of ribs ( 20 ) extending outwardly in a radial direction from the hub ( 11 );   a canopy ( 101 ) secured in covering relation on the ribs ( 20 );   a plurality of stretchers ( 30 ) having one end pivotably connected to the runner ( 12 );   a plurality of first joints ( 51 ) each secured onto the rib ( 20 ) and being proximate to the hub ( 11 ), the first joint ( 51 ) comprising a U-shaped member ( 511 );   a plurality of second joints ( 61 ) each slidably put on the rib ( 20 ) and being distal from the hub ( 11 ), the second joint ( 61 ) comprising a U-shaped member ( 611 );   a plurality of third joints ( 71 ) each secured onto the stretcher ( 30 ) and comprising a U-shaped member ( 711 );   a plurality of auxiliary rods ( 40 ); and   a plurality of sets of first, second, and third pivotal members ( 52 ,  62 , and  72 ),   wherein the first pivotal member ( 52 ) of each set is formed at the other end of the stretcher ( 30 ) and is pivotably connected to the U-shaped member ( 511 ) of the first joint ( 51 );   wherein the second pivotal member ( 62 ) of each set is formed at one end of the auxiliary rod ( 40 ) and is pivotably connected to the U-shaped member ( 611 ) of the second joint ( 61 ); and   wherein the third pivotal member ( 72 ) of each set is formed at the other end of the auxiliary rod ( 40 ) and is pivotably connected to the U-shaped member ( 711 ) of the third joint ( 71 ).   
     
     
         2 . The windproof umbrella of  claim 1 , wherein the first joint ( 51 ) further comprises a first hollow member ( 512 ) extending from one end of the U-shaped member ( 511 ), and a second hollow member ( 513 ) extending from the other end of the U-shaped member ( 511 ); the second joint ( 61 ) further comprises a first hollow member ( 612 ) extending from one end of the U-shaped member ( 611 ), and a second hollow member ( 613 ) extending from the other end of the U-shaped member ( 611 ); the rib ( 20 ) fixedly passes through the second hollow member ( 513 ) and the first hollow member ( 512 ); and the rib ( 20 ) passes through the second hollow member ( 613 ) and the first hollow member ( 612 ) with both the first and second hollow members ( 612 ,  613 ) being slidable thereon. 
     
     
         3 . The windproof umbrella of  claim 1 , wherein the third joint ( 71 ) further comprises a first hollow member ( 712 ) extending from one end of the U-shaped member ( 711 ), and a second hollow member ( 713 ) extending from the other end of the U-shaped member ( 711 ); and the stretcher ( 30 ) fixedly passes through the second hollow member ( 713 ) and the first hollow member ( 712 ). 
     
     
         4 . The windproof umbrella of  claim 1 , wherein lengths of the ribs ( 20 ) are the same. 
     
     
         5 . The windproof umbrella of  claim 1 , wherein lengths of the ribs ( 20 ) are different. 
     
     
         6 . The windproof umbrella of  claim 1 , wherein a triangle (t) is formed with the first joint ( 51 ) as the first vertex, the second joint ( 61 ) as the second vertex, and the third joint ( 71 ) as the third vertex, the triangle (t) may change three angles thereof in response to wind, the second joint ( 61 ) slides to change an angle (θ) between the rib ( 20 ) and the stretcher ( 30 ) at the first joint ( 51 ). 
     
     
         7 . A windproof umbrella comprising:
 a shank ( 10 ) having an upperhub ( 11 ) and a lower runner ( 12 ) slidably put on the shank ( 10 );   a plurality of ribs ( 20 ) extending outwardly in a radial direction from the hub ( 11 );   a canopy ( 101 ) secured in covering relation on the ribs ( 20 );   a plurality of stretchers ( 30 ) having one end pivotably connected to the runner ( 12 );   a plurality of first joints ( 51 ) each secured onto the rib ( 20 ) and being proximate to the hub ( 11 ), the first joint ( 51 ) comprising a U-shaped member ( 511 );   a plurality of second joints ( 61   b ) each secured onto the rib ( 20 ) and being distal from the hub ( 11 ), the second joint ( 61   b ) comprising a U-shaped member ( 611 );   a plurality of third joints ( 71 ) each secured onto the stretcher ( 30 ) and comprising a U-shaped member ( 711 );   a plurality of extenable auxiliary members ( 40 ); and   a plurality of sets of first, second, and third pivotal members ( 52 ,  62 , and  72 ),   wherein the first pivotal member ( 52 ) of each set is formed at the other end of the stretcher ( 30 ) and is pivotably connected to the U-shaped member ( 511 ) of the first joint ( 51 );   wherein the second pivotal member ( 62 ) of each set is formed at one end of the auxiliary member ( 40 ) and is pivotably connected to the U-shaped member ( 611 ) of the second joint ( 61   b ); and   wherein the third pivotal member ( 72 ) of each set is formed at the other end of the auxiliary member ( 40 ) and is pivotably connected to the U-shaped member ( 711 ) of the third joint ( 71 ).   
     
     
         8 . The windproof umbrella of  claim 7 , wherein the auxiliary member ( 40 ) is a telescopic member ( 40   b ) comprising an inner tube ( 41   b ) having one end fixedly connected to the second pivotal member ( 62 ), and an outer tube ( 42   b ) slidably put on the inner tube ( 41   b ), the outer tube ( 42   b ) having a reduced diameter end ( 43   b ) fixedly connected to the third pivotal member ( 72 ). 
     
     
         9 . The windproof umbrella of  claim 7 , wherein the auxiliary member ( 40 ) is an elastic member ( 40   c ) having one end ( 41   c ) anchored at a hole ( 62   c ) formed at the second joint ( 61   b ) and the other end ( 42   c ) anchored at a hole ( 72   c ) formed at the third joint ( 71 ). 
     
     
         10 . The windproof umbrella of  claim 7 , wherein lengths of the ribs ( 20 ) are the same. 
     
     
         11 . The windproof umbrella of  claim 7 , wherein lengths of the ribs ( 20 ) are different. 
     
     
         12 . The windproof umbrella of  claim 7 , wherein a triangle (t) is formed with the first joint ( 51 ) as the first vertex, the second joint ( 61   b ) as the second vertex, and the third joint ( 71 ) as the third vertex, the triangle (t) may change three angles thereof in response to wind, the second joint ( 61   b ) slides to change an angle (θ) between the rib ( 20 ) and the stretcher ( 30 ) at the first joint ( 51 ). 
     
     
         13 . A windproof umbrella comprising:
 a shank ( 10 ) having a upper hub ( 11 ) and a lower runner ( 12 ) slidably put on the shank ( 10 );   a plurality of ribs ( 20   d ) extending outwardly in a radial direction from the hub ( 11 );   a canopy ( 101 ) secured in covering relation on the ribs ( 20   d );   a plurality of bifurcated first joints ( 52   d ) each secured onto the rib ( 20   d ) and being proximate to the hub ( 11 );   a plurality of stretchers ( 30   d ) having one end pivotably connected to the runner ( 12 ) and the other end pivotably connected to the first joint ( 52   d );   a plurality of sliding tubes ( 61   f ) each slidably put on the rib ( 20   d ) and being distal from the hub ( 11 );   a plurality of bifurcated second joints ( 62   d ) each formed on the sliding tube ( 61   f );   a plurality of bifurcated third joints ( 72   d ) each secured onto the stretcher ( 30   d ); and   a plurality of auxiliary rods ( 40   f ) having one end ( 41   f ) pivotably connected to the second bifurcated joint ( 62   d ) and the other end pivotably connected to the third joint ( 72   d ).   
     
     
         14 . The windproof umbrella of  claim 13 , wherein each of the rib ( 20   d ), the stretcher ( 30   d ), and the auxiliary rod ( 40   f ) has a section of U and is formed of iron plate. 
     
     
         15 . The windproof umbrella of  claim 13 , wherein lengths of the ribs ( 20 ) are the same. 
     
     
         16 . The windproof umbrella of  claim 13 , wherein lengths of the ribs ( 20 ) are different. 
     
     
         17 . The windproof umbrella of  claim 13 , wherein a triangle (t) is formed with the first joint ( 52   d ) as the first vertex, the second joint ( 62   d ) as the second vertex, and the third joint ( 72   d ) as the third vertex, the triangle (t) may change three angles thereof in response to wind, the second joint ( 62   d ) slides to change an angle (θ) between the rib ( 20   d ) and the stretcher ( 30   d ) at the first joint ( 52   d ).