# US 2013/0152984 A1 · Umbrella structure having at least one mushroom-shaped hub for enabling rapid assembly of main rod and supporting members

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- Number: US 2013/0152984 A1
- Document ID: US20130152984A1
- Status: Published application
- Kind: A1
- Application number: 13/668,357
- Filed: 2012-11-05
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Inventors: Kuo-Hsiung CHOU
- Web page: https://patentgrep.com/patent/US20130152984A1

## CPC

- A45B 25/02: Umbrella frames
- A45B 25/06: Umbrella runners
- A45B: WALKING STICKS (walking aids, e.g. sticks, for blind persons A61H3/06); UMBRELLAS; LADIES' OR LIKE FANS (cane or umbrella stands or holders A47G25/12)

## Abstract

The present invention is to provide an umbrella structure including at least one mushroom-shaped hub, a plurality of supporting members, and a main rod. Each mushroom-shaped hub has a hollow tubular body, two openings at two opposite ends respectively, and a cap portion located near a first opening and formed with a plurality of evenly distributed grooves which extend in the radial direction of the first opening. The supporting member has one end whose diameter is less than the diameter of the first opening but greater than the width of each groove and which therefore can pass through the first opening and be received in the cap portion. Thus, when the main rod penetrates the two openings, the end of each supporting member can be limited in position in the cap portion, and the remaining portion thereof can extend out of the cap portion and move along the groove accordingly.

## Claims

### Claim 1

An umbrella structure having at least one mushroom-shaped hub for enabling rapid assembly of a main rod and supporting members, comprising:
at least one mushroom-shaped hub having a hollow tubular body, wherein each said mushroom-shaped hub has two ends respectively formed with a first opening and a second opening, the first and second openings of each said mushroom-shaped hub are in communication with each other, and each said mushroom-shaped hub has a cap portion which is adjacent to the first opening thereof, bulges in a radial direction of the tubular body thereof, and is formed with a plurality of evenly distributed grooves extending in a radial direction of the first opening thereof;
a plurality of supporting members each having an end whose diameter is less than a diameter of the first opening of a corresponding said mushroom-shaped hub but is greater than a width of each said groove of the corresponding mushroom-shaped hub, such that the end of each said supporting member can pass through the first opening of a corresponding mushroom-shaped hub and be received in the cap portion of the corresponding mushroom-shaped hub while a remaining portion of the each said supporting member passes through a corresponding said groove of the corresponding mushroom-shaped hub and extends out of the cap portion of the corresponding mushroom-shaped hub; and
a main rod extending through the first and second openings of each said mushroom-shaped hub such that not only the end of each said supporting member is limited in position in the cap portion of a corresponding said mushroom-shaped hub, but also a portion of each said supporting member that is adjacent to the end thereof is movable only in a corresponding said groove of a corresponding said mushroom-shaped hub.

### Claim 2 (depends on 1)

The umbrella structure of claim 1, wherein the end of each said supporting member is spherical.

### Claim 3 (depends on 2)

The umbrella structure of claim 2, comprising three said mushroom-shaped hubs, wherein one of the mushroom-shaped hubs is mounted around and fixed to a tip of the main rod, and the other two mushroom-shaped hubs are movably mounted around the main rod.

### Claim 4 (depends on 3)

The umbrella structure of claim 3, further comprising a spring movably mounted around the main rod and located between the two movable mushroom-shaped hubs.

### Claim 5 (depends on 4)

The umbrella structure of claim 4, further comprising a plastic sleeve mounted around the main rod and located between the fixed mushroom-shaped hub and an adjacent one of the movably mounted mushroom-shaped hubs.