Rib telescopic mechanism for an outdoor sunshade

Abstract

A rib telescopic mechanism for an outdoor sunshade is provided, includes: a mounting holder fixedly connected to a stem and ribs, a screw reducing motor, a nut support and a connecting rod; the screw reducing motor is fixed to a lower end of the mounting holder; a bottom of the mounting holder is defined with a through hole, and a stem of the screw reducing motor being passed through the through hole; and the screw is threaded with a nut support; the mounting holder is defined with mounting grooves that cooperate with the ribs at intervals along a circumference direction, when the nut support moves down along the stem, the ribs open; and when the nut support moves upward along the stem, the ribs close. Thus realizing the automatic opening and closing of the ribs, and no manual operation is required, with simple structure, convenient operation and high stability.

What is claimed is: 
     
         1 . A rib telescopic mechanism for an outdoor sunshade, comprising a mounting holder fixedly connected to a stem and a plurality of ribs, wherein, the rib telescopic mechanism for outdoor sunshade also comprising a screw reducing motor, a nut support and a connecting rod;
 wherein the screw reducing motor being fixed to a lower end of the mounting holder; and   a bottom of the mounting holder being defined with a through hole, and a stem of the screw reducing motor being passed through the through hole; and   the screw being threaded with a nut support; and   an outer wall of the mounting holder being defined with mounting grooves that cooperate with the ribs at intervals along a circumference direction, an upper end of each rib extends through the mounting grooves and inserts the mounting holder; and   the upper end of each rib being hinged with the mounting holder; and   the nut support is provided with a connecting portion corresponding to the ribs;   connecting rods being provided between the connecting portion and the ribs, two ends of each connecting rod being rotatably connected to the connection part and the upper end of each rib, respectively; and   when the nut support moves down along the stem, the ribs open; and when the nut support moves upward along the stem, the ribs close.   
     
     
         2 . The rib telescopic mechanism for the outdoor sunshade according to  claim 1 , wherein each side of the mounting grooves is fixed with a hinging protrusion, the hinging protrusion is defined with a through hole, each connecting rod is configured to pass through the through hole and each rib is fixed between a pair of hinging protrusions correspondingly. 
     
     
         3 . The rib telescopic mechanism for the outdoor sunshade according to  claim 1 , wherein, a center of the nut support is provided with a threaded hole connected to the screw; and
 the connecting portion is defined with an inner connecting groove that penetrates the screw along an axial direction, the connecting portion is provided with an inner connecting hole perpendicular to the inner connecting groove; and   a lower end of the connecting rod extends into the inner connecting groove and is rotatably connected with the connecting portion through an inner rotating shaft; and   an inner end of each rib is provided with an outer connecting groove penetrating it vertically, and an inner end of each rib is provided with an outer connecting hole perpendicular to the outer connecting groove;   an upper end of the connecting rod is extended into the outer connecting groove and is rotatably connected to a corresponding rib through an outer rotating shaft.   
     
     
         4 . The rib telescopic mechanism for the outdoor sunshade according to  claim 1 , wherein, the mounting holder comprises a supporting part, an inclining part and an mounting part arranged in sequence;
 wherein the supporting part is circular and inserted into an upper end of a tubular rod; and   an upper end of the supporting part is firmly attached to a supporting plate, the through hole is provided on the supporting plate; and   the screw reducing motor extends into the supporting part and connects firmly to the supporting plate; and   the inclining part is in a circular table shape with a upper part and a lower part, and a size of the upper part is bigger than that of the lower part;   the mounting slots are arranged on the mounting portion centered on a central axis of the mounting holder.   
     
     
         5 . The rib telescopic mechanism for the outdoor sunshade according to  claim 1 , wherein, a pulling spring is provided between each connecting rod and the inclining part. 
     
     
         6 . The rib telescopic mechanism for the outdoor sunshade according to  claim 1 , wherein the mounting holder is provided with an upper opening; and
 a cap is detachable fixed on an upper portion of the mounting holder, and the cap is defined with accommodating holes in coordination with the ribs.   
     
     
         7 . The rib telescopic mechanism for the outdoor sunshade according to  claim 6 , wherein, a center of the cap is provided with a positioning block; and
 a lower end of the positioning block is fixed connected to a bearing, and the inner ring of the bearing is fixed to the upper end of the screw.   
     
     
         8 . The rib telescopic mechanism for the outdoor sunshade according to  claim 1 , wherein each rib comprises a connector and a main body, an outer end of the connector is fixed to the main body; and
 a middle part of the connector is hinged with the mounting holder, an inner end of the connector is located inside the mounting holder, and the connector is rotatably connected to the connecting rod.   
     
     
         9 . The rib telescopic mechanism for the outdoor sunshade according to  claim 8 , wherein the main body has a hollow structure, a middle part of the main body is provided with a reinforcing plate, the reinforcing plate separates the main body into an upper cavity and lower cavity; and
 a lower sidewall of the lower cavity is defined with a slot penetrating the main body in a length direction.   
     
     
         10 . The rib telescopic mechanism for the outdoor sunshade according to  claim 1 , wherein a plurality of the ribs are provided, and the plurality of the ribs are arranged in a circular array around the central axis of the mounting holder.