Patent ID: 8534304
Filing Date: 2013-09-17
Classification: A45B

Abstract:
1. A tiltable sunshade comprising: a pole including upper and lower ends spaced from each other along a longitudinal axis of the pole, with the pole further including an outer periphery and an inner periphery spaced from the outer periphery in a radial direction perpendicular to the longitudinal axis of the pole, with the inner periphery of the pole defining a longitudinal hole, with a first hole extending from the outer periphery through the inner periphery, with the lower end of the pole adapted to be rotatably coupled to a tube on a base; a first transmission member rotatably mounted in the first hole, with the first transmission member including a toothed portion located in the longitudinal hole of the pole; a handle located outside of the pole and fixed to the first transmission member, with the handle and the first transmission member jointly rotatable about a rotating axis perpendicular to the longitudinal axis of the pole; a support fixed in the longitudinal hole of the pole and located above the first transmission member along the longitudinal axis of the pole; a second transmission member received in the longitudinal hole of the pole, with the second transmission member including a shaft rotatably supported by the support, with the second transmission member further including a toothed portion meshed with the toothed portion of the first transmission member, with the second transmission member rotating about the longitudinal axis of the pole when the first transmission member rotates about the rotating axis; a screw rod including a lower end fixed to the second transmission member and an upper end, with the screw rod including a small pitch portion at the upper end thereof and a large pitch portion extending from a lower end of the small pitch portion to the lower end of the screw rod, with the large pitch portion having a pitch larger than a pitch of the small pitch portion, with the screw rod and the second transmission member jointly rotatable about the longitudinal axis of the pole; a follower received in the longitudinal hole of the pole and threadedly engaged with the screw rod, with rotation of the screw rod about the longitudinal axis of the pole causing movement of the follower along the longitudinal axis of the pole between a folded position, an unfolded position, and a tilted position, with a first spacing between the follower in the folded position and the second transmission member along the longitudinal axis of the pole being smaller than a second spacing between the follower in the unfolded position and the second transmission member along the longitudinal axis of the pole, with the second spacing being smaller than a third spacing between the follower in the tilted position and the second transmission member along the longitudinal axis of the pole; a runner mounted around the pole and slideable relative to the pole; a plurality of stretchers each having a first end pivotably connected to the runner and a second end spaced from the first end along a longitudinal axis of the stretcher, with the plurality of stretchers jointly movable with the runner and the follower; a fixing member fixed to the upper end of the pole, with the fixing member including a sliding groove and a pin hole; a pivotable member pivotably connected to the fixing member, with the pivotable member including a track and a pivot hole; a pin extending through the pivot hole of the pivotable member and the pin hole of the fixing member, with the pivotable member pivotable relative to the fixing member about a pivot axis defined by the pin between a first position and a second position, with a longitudinal axis of the pivotable member in the first position being coaxial to the longitudinal axis of the pole, with the longitudinal axis of the pivotable member in the second position being at an acute angle to the longitudinal axis of the pole; an actuation rod slideably extending through the sliding groove of the fixing member and slideably received in the track of the pivotable member; a link including a first connection end connected to the actuation rod and a second connection end; a connection member including a first end pivotably connected to the second connection end of the link and a second end; a positioning pin extending through the connection member in a radial direction perpendicular to the longitudinal axis of the pole, with the positioning pin having two ends located outside of the connection member; a spring mounted around the connection member and including a first end abutting the fixing member and a second end abutting the two ends of the positioning pin; a hub mounted to the pivotable member, with the hub and the pivotable member jointly pivotable between the first and second positions; and a plurality of ribs each including a connecting end pivotably connected to the hub, with the second end of each of the plurality of stretchers pivotably connected to one of the plurality of ribs, with a canopy adapted to be mounted to the plurality of ribs, wherein when the follower moves between the folded position and the unfolded position, the follower moves along the large pitch portion at a first speed, wherein when the follower is in the folded position, the follower is spaced from the second end of the connection member along the longitudinal axis of the pole and located adjacent to the lower end of the screw rod, the pivotable member is in the first position with each of the plurality of stretchers and the plurality of ribs located adjacent to the pole, with the canopy adapted to be in a collapsed state, wherein when the follower is in the unfolded position, the follower is around an intersection between the large pitch portion and the small pitch portion, the pivotable member is in the first position, and the canopy is adapted to be unfolded by the plurality of stretchers and the plurality of ribs, wherein when the follower moves from the unfolded position to the tilted position, the follower is driven by the small pitch portion of the screw rod at a second speed smaller than the first speed to push the connection member to move along the longitudinal axis of the pole, causing compression of the spring by the positioning pin, the connection member actuates the link to move the actuation rod along the sliding groove of the fixing member, the actuation rod presses against a wall of the track of the pivotable member to pivot the pivotable member from the first position to the second position, the hub, the plurality of ribs, and the plurality of stretchers pivot together with the pivotable member, and the hub and the plurality of ribs are tilted relative to the pole, and wherein when the follower moves from the tilted position to the unfolded position, the spring presses against the positioning pin to cause the connection member and the link to move jointly along the longitudinal axis of the pole, the actuation rod presses against the wall of the track of the pivotable member to pivot the pivotable member from the second position to the first position, and the hub and the plurality of ribs are not tilted relative to the pole when the pivotable member is in the first position.