CN201032891Y - Automatic pressure-reducing wind-resisting umbrella - Google Patents

Abstract

The utility model discloses an automatic pressure relief and wind resistance umbrella, in particular to an umbrella, which comprises an umbrella. Wherein, the umbrella is composed of a central rod device, umbrella ribs and an umbrella cover. A first trapezoid hole (11), a second trapezoid hole (12) and a third trapezoid hole (13) are arranged on each sector umbrella cover (10). A first cover cloth (21), a second cover cloth (22) and a third cover cloth (23) are respectively arranged on the first, the second and the third trapezoid hole (11), (12) and (13). In addition, the first, the second and the third cover cloth (21), (22) and (23) are respectively sewed with a left, an upper and a right side of the first, the second and the third trapezoid hole (11), (12) and (13) with a lower opening. With a simple structure, the utility model only arranges the trapezoid holes and connects cover cloth (20) on the umbrella cover (10), thus ensuring easy implementation and excellent wind resistance and adapting to modifications of various prior umbrellas.

Description

Automatically the wind resistance umbrella reduces pressure

Technical field

The utility model relates to a kind of umbrella, relates in particular to a kind of automatic decompression wind resistance umbrella.

Background technology

Umbrella with sun-shading rain-proof function is the daily living article of everybody indispensability, existing thousands of years history.Even to this day, although the designs and varieties of umbrella are various, have automatically, have foldingly, its main member is the most basic as middle bar device, umbrella frame, umbrella cover.

In actual use, the umbrella situation of being turned over by wind is recurrent.Because umbrella cover is a kind of overall structure of pot shape, and the people holds up an umbrella when moving ahead, wind very easily enters from below, makes umbrella cover become a kind of stress surface that goes for a drive.Especially when strong wind, umbrella cover is blown turn over, heavy then umbrella is damaged.

At present, people have developed the wind resistance umbrella of many forms, although certain wind resistance effect is arranged, and complex structure, cost is high, damages easily, and these are concerning a kind of articles for daily use, and its market must be restricted.

Summary of the invention

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect that prior art exists, and a kind of automatic decompression wind resistance umbrella is provided.

The purpose of this utility model is achieved in that

The utility model is to improve to form on the existing basis that comprises the umbrella that middle bar device, umbrella frame, umbrella cover constitute, specifically:

As Fig. 1,2,3, be example with single fan-shaped umbrella cover.Single fan-shaped umbrella cover (10) is provided with trapezoidal hole, and trapezoidal hole is provided with drop cloth (20), the left side of drop cloth (20) and trapezoidal hole, last, the right stitching, following opening.

When umbrella strutted, umbrella cover (10) was tight; Drop cloth (20) relaxes.

Operation principle of the present utility model is:

Trapezoidal hole on umbrella cover (10) is actually a ventilating opening, and the drop cloth that is provided with on trapezoidal hole (20) is a kind of drop cloth that can close of opening.

When wind from last, when the side blows, drop cloth (20) is tightly covered trapezoidal hole by wind, rainwater can not enter in the umbrella, as Fig. 4;

When wind under when entering, drop cloth (20) is opened by wind, has reduced the pressure that wind produces umbrella thereby make trapezoidal hole form air vent, the situation of having avoided umbrella to be turned over by wind is as Fig. 5.

The utlity model has following advantage and good effect:

1, simple in structure, only umbrella cover (10) is provided with trapezoidal hole and is connected with drop cloth (20), therefore implements easily;

2, wind resistance is effective.

3, be applicable to having the improvement of all kinds of umbrellas now.

Description of drawings

Fig. 1 is single fan-shaped umbrella cover structural representation;

Fig. 2 is single group drop cloth structural representation;

Fig. 3 is umbrella cover and drop cloth combining structure schematic diagram;

Fig. 4 be the utility model wind from, the design sketch (being example only) that blows of side with single sector;

Fig. 5 is the design sketch (being example with single sector only) that the utility model enters from below at wind.

Wherein:

The 10-umbrella cover,

11-the 1st trapezoidal hole,

12-the 2nd trapezoidal hole,

13-the 3rd trapezoidal hole;

The 20-drop cloth,

21-the 1st drop cloth,

22-the 2nd drop cloth,

23-the 3rd drop cloth.

The specific embodiment

Further specify below in conjunction with drawings and Examples:

1, on each fan-shaped umbrella cover (10), 1～5 trapezoidal hole is set, a drop cloth (20) is set on each trapezoidal hole, the left side of drop cloth (20) and trapezoidal hole, last, the right stitching, following opening.

Trapezoidal hole is many more, and the wind resistance effect is good more, but cost is also high.

2, most preferred embodiment

As Fig. 1, each fan-shaped umbrella cover (10) is provided with the 1st, 2,3 trapezoidal holes (11,12,13);

As Fig. 2, on the 1st, 2,3 trapezoidal holes (11,12,13), be respectively arranged with the 1st, 2,3 drop cloth (21,22,23);

As Fig. 3, the 1st, 2,3 drop cloth (21,22,23) respectively with the left side of the 1st, 2,3 trapezoidal holes (11,12,13), go up, the right sews up following opening.

3, experiment

For the 550mm umbrella is an example, covering of the fan is provided with 3 trapezoidal holes with the radius:

The 1st trapezoidal hole (11), upper base 60mm, the 100mm that goes to the bottom, high 70mm;

The 2nd trapezoidal hole (12), upper base 130mm, the 180mm that goes to the bottom, high 90mm;

The 3rd trapezoidal hole (13), upper base 210mm, the 300mm that goes to the bottom, high 120mm.

The pressure of the wind that the utility model bore should comprise the pressure of the wind that umbrella cover (10) is born and the pressure of the wind that drop cloth (20) is born.

1) the single fan-shaped gross area is 90000mm ²The perforated area of 3 trapezoidal holes is 50150mm ²

The percentage that perforate accounts for the gross area is: (50150/90000) * 100%=55.7%.

The pressure of the wind that umbrella cover (10) is born mainly is directly proportional with the effective area of umbrella cover (10).After umbrella cover (10) was gone up perforate, effective area reduced.By calculating as seen, use the present invention, under the situation that does not improve former umbrella body structure intensity, wind loading rating will significantly improve.

2) in addition, the drop cloth (20) that is connected with umbrella cover (10) though the pressure of the wind that also bears because the force resolution effect, so the pressure of the wind that bears of the front of drop cloth (20) is very little.

Claims (2)

1. the wind resistance umbrella that reduces pressure automatically comprises the umbrella that is made of middle bar device, umbrella frame, umbrella cover;

It is characterized in that: umbrella cover (10) is provided with trapezoidal hole, and trapezoidal hole is provided with drop cloth (20), the left side of drop cloth (20) and trapezoidal hole, last, the right stitching, following opening.

2. by the described a kind of automatic decompression wind resistance umbrella of claim 1, it is characterized in that:

Each fan-shaped umbrella cover (10) is provided with the 1st, 2,3 trapezoidal holes (11,12,13);

On the 1st, 2,3 trapezoidal holes (11,12,13), be respectively arranged with the 1st, 2,3 drop cloth (21,22,23);

1st, 2,3 drop cloth (21,22,23) respectively with the left side of the 1st, 2,3 trapezoidal holes (11,12,13), go up, the right sews up following opening.

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