Bag expanding device

Abstract

A bag expanding device includes a base portion having two first foldable portions connected to two sides thereof along a first folding portion which is connected between the first foldable portion and the base portion. Two second foldable portions are connected to the two first foldable portions along a second folding portion which is located to connect the first foldable portion and the second foldable portion. Each of the two first folding portions and each of the two second folding portions have at least one biasing member connected thereto such that the first and second foldable portions can be expanded away from the base portion to expand the bag.

Description

FIELD OF THE INVENTION

The present invention relates to a bag expanding device for expanding bags to maintain the bags in expanded status, and the device is flatten to a thin combination which saves storage room.

BACKGROUND OF THE INVENTION

A conventional expanding device for maintaining bags in expanded or using status is shown in FIGS. 6 and 7, and the expanding device makes the bag have no obvious wrinkles on the bags and display the shape of the bag as designed. The conventional expanding device generally includes a flat C-shaped board which includes a base portion 8 and two folded portions 81 which are extended from two ends of the base portion 8 and are folded toward the base portion 8 to reduce the thickness thereof. Two springs 7 are compressed between the base portion 8 and the two folded portions 81. A strip 6 is wrapped around the expanding device along the gap between the two ends of the folded portions 81 so as to restrict the two folded portions 81 from being pivoting upward. A wire is tied to the strip 6. The expanding device is put into a bag 9 as shown in FIG. 6 and the user then pulls the wire 61 which cuts the strip 6 so that the two springs 7 pop upward and the two folded portions 81 pivot upward and away from the base portion 8 as shown in FIG. 8 to expand the bag 9. However, the conventional expanding device includes too many parts and a complicated structure which includes the manufacturing cost. Besides, the thickness is still too thick.

The present invention intends to provide a bag expanding device which includes a simple structure and can be folded to a thin status for convenience of storage.

SUMMARY OF THE INVENTION

The present invention relates to a bag expanding device that comprises a base portion having two first foldable portions connected to two sides thereof and the two first foldable portions is foldable along a first folding portion located to connect the first foldable portion and the base portion. Two second foldable portions are connected to the two first foldable portions and foldable along a second folding portion which is located to connect the first foldable portion and the second foldable portion. At least one first biasing member is connected to each of the two first folding portions, and at least one second biasing member is connected to each of the two second folding portions and biased between the first foldable portion and the second foldable portion.

The primary object of the present invention is to provide a bag expanding device that is easily to be manufactured and can be folded to have a thin thickness.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view to show the bag expanding device of the present invention;

FIG. 2 is a cross sectional view to show that the bag expanding device of the present invention is in flattened status;

FIG. 3 shows that the flattened bag expanding device is out into a bag;

FIG. 4 shows torsion springs are installed to the folding portions of the bag expanding device of the present invention;

FIG. 5 shows that the bag is expanded by the bag expanding device of the present invention;

FIG. 6 shows a cross sectional view of a conventional bag expanding device in flattened status;

FIG. 7 shows the perspective view of the conventional bag expanding device, and

FIG. 8 shows that the conventional bag expanding device expands the bag.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 and 2, the bag expanding device 1 of the present invention comprises a base portion 11 which is a rectangular board and includes two first foldable portions 12 connected to two sides thereof and the two first foldable portions 12 are foldable along a first folding portion 13 which is located to connect the first foldable portion 12 and the base portion 11. Two first biasing members 2 are connected to each of the two first folding portions 13 and biased between the base portion 11 and the first folding portion 13. Each of the two first biasing members 2 is a torsion spring which includes two legs 21 which are respectively in contact with the base portion 11 and the first folding portion 13.

Two second foldable portions 14 are connected to the two first foldable portions 12 and foldable along a second folding portion 15 which is located to connect the first foldable portion 12 and the second foldable portion 14. A second biasing member 20 is connected to each of the two second folding portions 15 and biased between the first foldable portion 13 and the second foldable portion 14. Each of the second biasing members 20 is a torsion spring which includes two legs 210 which are respectively in contact with the first foldable portion 12 and the second foldable portion 14.

The base portion 11, the first foldable portions 12 and the second foldable portions 14 can be made by paper boards or plastic boards.

As shown in FIGS. 3 to 5, the bag expanding device 1 is inserted into a bag 3 while the first and second foldable portions 12, 14 are pressed on the base portion 11. After the bag expanding device is inserted into a bag 3 as shown in FIG. 3, the first and second foldable portions 12, 14 are released such that the first and second biasing members 2, 20 expand and the first foldable portions 12 and the second folding portions 14 are expanded away from the base portion 11 to expand the bag 3 as shown in FIG. 5.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims

1. A bag expanding device comprising:

a base portion having two first foldable portions connected to two sides thereof and the two first foldable portions foldable along a first folding portion which is located to connect the first foldable portion and the base portion;

two second foldable portions connected to the two first foldable portions and foldable along a second folding portion which is located to connect the first foldable portion and the second foldable portion;

at least one first biasing member connected to each of the two first folding portions and biased between the base portion and the first foldable portion, and

at least one second biasing member connected to each of the two second folding portions and biased between the first foldable portion and the second foldable portion.

2. The device as claimed in claim 1, wherein the at least one first biasing member is a torsion spring which includes two legs which are respectively in contact with the base portion and the first foldable portion.

3. The device as claimed in claim 1, wherein the at least one second biasing member is a torsion spring which includes two legs which are respectively in contact with the first foldable portion and the second foldable portion.

4. The device as claimed in claim 1, wherein the base portion, the first foldable portions and the second foldable portions are made by paper boards.

5. The device as claimed in claim 1, wherein the base portion, the first foldable portions and the second foldable portions are made by plastic boards.

6. The device as claimed in claim 1, wherein the base portion is a rectangular board.