WIND-RESISTANT UMBRELLA FRAME STRUCTURE

Abstract

A wind-resistant umbrella frame structure is applicable to an arrangement of dual canopies and includes a primary frame and a secondary frame. The primary frame has an inner end pivotally connected to a crown and an outer end connected to the annular lower canopy. The secondary frame is pivotally connected to the runner and has an opposite end pivotally connected to the primary frame. The primary frame includes an internal rib, an intermediate rib, an external rib, and a traction rib assembly, and also includes an intermediate rib return wire, an external rib return wire, and a collapse spring. The umbrella frame structure allows air flows to be readily conducted out and ensures the service life of the canopies.

Claims

1. A wind-resistant umbrella frame structure, which is applicable to an arrangement of dual canopies, the umbrella frame structure comprising a primary frame and a secondary frame, wherein the primary frame has an inner end pivotally connected to an umbrella crown and an outer end connected, through a bead, to an outer circumference of an annular lower canopy; and the secondary frame has an end pivotally connected to a runner that is slidable up and down along an umbrella post and an opposite end pivotally connected to the primary frame; wherein the primary frame comprises an internal rib, an intermediate rib, an external rib, and a traction rib assembly and also comprises an intermediate rib return wire, an external rib return wire, and a collapse spring; the internal rib has an inner end pivotally connected to the crown and an outer end pivotally connected, through a first pivot joint, to the intermediate rib and the intermediate rib has an outer end pivotally connected, through a second pivot joint, to the external rib; the intermediate rib return wire has an end pivotally connected to the secondary frame and an opposite end pivotally connected to the first pivot joint and the collapse spring has an end connected to the secondary frame and an opposite end connected to the first pivot joint; the external rib return wire has an end pivotally connected to the intermediate rib and an opposite end pivotally connected to the external rib; and the traction rib assembly has an end connected to the first pivot joint and an opposite end connected to the external rib.

2. The wind-resistant umbrella frame structure according to claim 1, wherein the intermediate rib return wire has an end pivotally connected to the secondary frame and an opposite end pivotally connected to a joint of the first pivot joint on the intermediate rib.

3. The wind-resistant umbrella frame structure according to claim 1, wherein the traction rib assembly comprises a rigid traction rib and a flexible traction wire, the traction rib having a free end connected to the first pivot joint, the traction wire having a free end connected to the external rib at a location adjacent to an outer end thereof.

4. The wind-resistant umbrella frame structure according to claim 1, wherein the annular lower canopy has an inner circumference fixed to the first pivot joint.

5. The wind-resistant umbrella frame structure according to claim 1, wherein an upper canopy has an outer circumference fixed to an outside surface of the annular lower canopy at a location corresponding to the frame and the fixed end is close, in location, to the second pivot joint, the first pivot joint forming a connection point with the upper canopy.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a schematic view showing a wind-resistant umbrella according to the present invention.

[0015] FIG. 2 is a schematic view illustrating an umbrella frame structure according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

[0017] As shown in FIGS. 1 and 2, the present invention discloses a wind-resistant umbrella frame structure, which is applicable to a dual-canopy arrangement. The umbrella frame structure comprises a primary frame A and a secondary frame B, wherein the primary frame A has an inner end pivotally connected to an umbrella crown C and an outer end connected, through a bead D, to an outer circumference of an annular lower canopy E. The secondary frame B has an end pivotally connected to a runner G that is slidable up and down along an umbrella post F and an opposite end pivotally connected to the primary frame A.

[0018] The primary frame A comprises an internal rib 1, an intermediate rib 2, an external rib 3 and a traction rib assembly 4 and also comprises an intermediate rib return wire 21, an external rib return wire 31, and a collapse spring 5. The internal rib 1 has an inner end pivotally connected to the crown C and an outer end that is pivotally connected to the intermediate rib 2 at a first pivot joint 6. The intermediate rib 2 has an outer end pivotally connected to the external rib 3 at a second pivot joint 7. The intermediate rib return wire 21 has an end pivotally connected to the secondary frame B and an opposite end pivotally connected to a joint of the first pivot joint 6 on the intermediate rib 2. The collapse spring 5 has an end connected to the secondary frame B and an opposite end connected to the first pivot joint 6. The external rib return wire 31 has an end connected to the first pivot joint 6 and an opposite end pivotally connected to the external rib 3. The traction rib assembly 4 comprises a rigid traction rib 41 and a flexible traction wire 42 coupled to each other. The traction rib 41 has a free end connected to the intermediate rib 2 and the traction wire 42 has a free end connected to the external rib 3 at a location adjacent to an outer end thereof.

[0019] The secondary frame B has an opposite end pivotally connected to the internal rib 1.

[0020] The annular lower canopy E has an inner circumference that is fixed to the first pivot joint 6.

[0021] An upper canopy H has an outer circumference that is fixed to an outside surface of the annular lower canopy E at a location corresponding to the frame and the fixed end is close, in location, to the second pivot joint. The first pivot joint 6 also forms a connection point with the upper canopy E.

[0022] When the canopies are expanded, said opposite end of the secondary frame B pushes the internal rib 1 to expand by following an upward movement of the runner G and at the same time, the intermediate rib return wire 21 applies a force to the joint of the first pivot joint 6 on the intermediate rib 2 in a direction toward the umbrella post so as to allow the external rib 3 to be expanded during expansion of the intermediate rib 2, whereby through such a series of movements of the frame, an operation of opening the umbrella is achieved and the collapse spring 5 is in a condition of being stretched with energy stored therein. The arrangement of the traction rib assembly 4 provides a predetermined force of traction to the external rib 3 to prevent the frame from being turned inside out due to the canopy receiving and collecting winds therein.

[0023] When a gust or strong wind is encountered, an air flow blows in from the underside of the canopies and an air flow passage is formed between the upper canopy H and the annular lower canopy E to smoothly conduct the air flow out whereby a situation that the frame is turned inside out or even broken in a windy day could be prevented.

[0024] To collapse the umbrella, due to the spring force of the collapse spring 5, together with a downward movement of the runner the ribs are moved opposite to the umbrella opening operation as described above so as to achieve an effect of closing the umbrella.

[0025] In summary, the present invention provides a wind-resistant umbrella frame that helps effectively improve supporting to an upper canopy H and also provides advantages of simplified structure and stable supporting and allowing air flow to be readily conducted out to ensure the service life of the umbrella canopy.

[0026] It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

[0027] While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention.