Disclosed herein are retractable umbrella frame devices comprising a base body structure at least partially surrounding a central axis structure. The central axis structure can be connected to a skeletal frame structure comprising a plurality of arms having a first end connected to the central axis structure and a second free end. The plurality of arms can be moveably connected to the central axis structure, such that the arms can be retracted into or extended from the base body structure. In some embodiments, the base body structure comprises open portions along its length. In some embodiments, the retractable umbrella frame devices further comprise one or more secondary support structures at least partially surrounding the base body structure. In some embodiments, the retractable umbrella frame devices can further comprise guide structures connected to the one or more secondary support structures and the arms of the skeletal frame structure.

Disclosed herein are retractable umbrella frame devices comprising a base body structure at least partially surrounding a central axis structure. The central axis structure can be connected to a skeletal frame structure comprising a plurality of arms having a first end connected to the central axis structure and a second free end. The plurality of arms can be moveably connected to the central axis structure, such that the arms can be retracted into or extended from the base body structure. In some embodiments, the base body structure comprises open portions along its length. In some embodiments, the retractable umbrella frame devices further comprise one or more secondary support structures at least partially surrounding the base body structure. In some embodiments, the retractable umbrella frame devices can further comprise guide structures connected to the one or more secondary support structures and the arms of the skeletal frame structure.

Provided is an automatic umbrella. The middle rod structure comprises an outer sleeve; a movable sleeve; a first elastic element; a locating element; an adjustment element; and a long rod comprising a long rod upper end and a long rod lower end; wherein the long rod upper end is abutted against the adjustment element, and the long rod lower end is located inside the movable sleeve for limiting the first elastic element from moving along a direction perpendicular to the longitudinal direction.

An umbrella frame bending structure for two-fold inverted umbrella includes an umbrella shaft assembly, an umbrella frame and bending devices. The bending devices are arranged on the umbrella frame such that when the main ribs and auxiliary ribs of the umbrella frame are opened, the auxiliary ribs limit the opening distance of the main ribs, causing the main ribs to curve. The umbrella frame bending structure has the advantages of low cost, simple structure and ease of installation.

An umbrella frame structure for two-fold inverted umbrella includes an umbrella shaft assembly, and a plurality of rib assemblies each including a main rib, a sub rib, a stretcher and a tip that connects one end of the main rib and one end of the sub rib. The stretcher has one end thereof connected to a part of the main rib between the two opposite ends of the main rib, and an opposite end thereof disposed in one respective positioning groove of a lower nest of the umbrella shaft assembly and pivotally connected with an opposite end of the sub rib in the respective positioning groove. The main rib has an opposite end thereof pivotally connected to an upper nest of the umbrella shaft assembly.

An umbrella frame structure for two-fold inverted umbrella includes an umbrella shaft assembly, and a plurality of rib assemblies each including a main rib, a sub rib, a stretcher and a tip that connects one end of the main rib and one end of the sub rib. The stretcher has one end thereof connected to a part of the main rib between the two opposite ends of the main rib, and an opposite end thereof disposed in one respective positioning groove of a lower nest of the umbrella shaft assembly and pivotally connected with an opposite end of the sub rib in the respective positioning groove. The main rib has an opposite end thereof pivotally connected to an upper nest of the umbrella shaft assembly.

Provided is an automatic umbrella. The middle rod structure comprises an outer sleeve; a movable sleeve; a first elastic element; a locating element; an adjustment element; and a long rod comprising a long rod upper end and a long rod lower end; wherein the long rod upper end is abutted against the adjustment element, and the long rod lower end is located inside the movable sleeve for limiting the first elastic element from moving along a direction perpendicular to the longitudinal direction.

Disclosed herein are retractable umbrella frame devices comprising a base body structure at least partially surrounding a central axis structure. The central axis structure can be connected to a skeletal frame structure comprising a plurality of arms having a first end connected to the central axis structure and a second free end. The plurality of arms can be moveably connected to the central axis structure, such that the arms can be retracted into or extended from the base body structure. In some embodiments, the base body structure comprises open portions along its length. In some embodiments, the retractable umbrella frame devices further comprise one or more secondary support structures at least partially surrounding the base body structure. In some embodiments, the retractable umbrella frame devices can further comprise guide structures connected to the one or more secondary support structures and the arms of the skeletal frame structure.

The present invention relates to a portable shelter assembly. The assembly includes a support; and an expandable shelter for being supported by the support and expanding to shelter at least one person. The shelter includes ribs extending from the support. Each rib includes one or more proximal elements pivotally mounted to the support. Each rib further includes a distal element extending from the proximal elements and configured to move outwardly to expand the shelter when the proximal elements pivot in a first direction. Advantageously, the distal elements may be simply pulled down one at a time to lift the connected proximal elements and extend the ribs, which is advantageous in windy conditions, or pulled down together to lift the proximal elements and extend the ribs.

An automatic inversely foldable umbrella includes a skeleton structure provided with a main shaft; an upper runner fixed to one end of the main shaft; a lower runner slidably disposed on the main shaft; a middle runner slidably disposed on the main shaft between the upper runner and the lower runner; plural skeleton linkages having a first rib, a second rib, and a foldable rib; plural linking members with one end pivotally disposed on the lower runner and the other end connected with the first rib; a resilient member disposed between the middle runner and the lower runner, and compressible due to the middle runner and the lower runner movement; a first canopy combined to the upper runner and a second canopy combined to the lower runner for covering the skeleton linkages; and a handle. Therefore, the folding and expanding operation of the umbrella are facilitated.