US 20090000650 A1
The umbrella structure contains a tubular member, a central shaft whose bottom section is sleeved in the tubular member, an upper next fixedly configured at a top end of the central shaft, a lower nest slidably configured along the central shaft in the other section without the tubular member, a number of collapsible ribs radially arranged around and pinned joined to the upper nest, and a number of stretchers connecting the ribs to the lower nest.
1. An umbrella structure comprising:
a tubular member having a handle at a bottom end;
a central shaft whose bottom section is sleeved in said tubular member, said central shaft being made of a plastic material;
an upper nest fixedly configured at a top end of said central shaft;
a lower nest slidably configured along said central shaft in the other section without said tubular member;
a plurality of ribs radially arranged around and pinned joined to said upper nest; and
a plurality of stretchers, each with the two ends connected to a rib and said lower nest, respectively.
2. The umbrella structure according to
3. The umbrella structure according to
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5. The umbrella structure according to
The present invention generally relates to umbrellas and more particularly to an umbrella structure whose components are all made of plastic materials.
Some disadvantages of a conventional umbrella can be summarized as follows. First, the rib structure is usually made of some metallic material for better strength. However, metallic ribs also mean heavier weight and inferior convenience. In addition, pointed metallic ribs present a potential safety hazard to the user.
Secondly, other than the ribs, quite a few other components such as the central shaft, the bolts joining the rib sections, and the connecting wires, etc., are also made of metallic materials. These metallic components inevitably would have rust problems. The rusted components not only affect the appearance of the umbrella but also hinder the operation of the umbrella.
Thirdly, these metallic components are difficult to recycle. Even though some umbrellas combine recyclable plastic parts with the umbrella structure to avoid some of the foregoing problems, the plastic parts actually add additional difficulty in classifying the umbrella for recycle.
Furthermore, the design flexibility of conventional umbrella is usually limited to the gore of the umbrella. The central shaft of the umbrella most of the time is not matched with the gore design, which makes the umbrella less appealing to the user.
Accordingly, a novel umbrella structure is provided herein. The umbrella structure contains a tubular member, a central shaft whose bottom section is sleeved in the tubular member, an upper nest fixedly configured at a top end of the central shaft, a lower nest slidably configured along the central shaft in the other section without the tubular member, a number of collapsible ribs radially arranged around and pinned joined to the upper nest, and a number of stretchers connecting the ribs to the lower nest.
The foregoing components are all made of some plastic materials and the umbrella is therefore handy, light-weighted, and robust to rusting. All plastic components also significantly enhance the operation safety of the umbrella. In addition, the tubular member can be configured to have a matched color to the gore, a superior touch and texture, and a more appealing appearance. At last, the all-plastic umbrella structure is highly recyclable and therefore is much friendlier to environment protection.
The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
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.
As illustrated in
The major characteristics of the present invention lie in the following. The central shaft 10 and all the foregoing components are made of some plastic materials and therefore the umbrella structure is handy, light-weighted, and robust to rusting. Them, the bottom section of the central shaft 10 is sleeved in a tubular member 40 which can have a handle 50 configured at a bottom end of the tubular member 40. The purpose of having the tubular member 40 is mainly for ornamentation. The tubular member 40 can have a matching color to the gore of the umbrella. The tubular member 40 can also be configured to enhance the appearance, touch, and texture of the umbrella, which is difficult to achieve by the conventional central shaft 10 alone.
Additionally, a cap member 60 can be provided on top of the upper nest 20. For collapsible umbrella, the cap member 60 usually has a short cylindrical shape. For non-collapsible umbrella, the cap member 60 usually has an elongated and pointed shape.
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 spirit of the present invention.