The present invention relates to chairs, and in particular to foldable chairs which can be overlapped with less spaces and slide proof design is contained in the chairs.
Foldable chairs are generally used in a large space (such as in school, or a gymnasium, a conference hall, etc.). Therefore, as the chairs are not used, the chairs can be folded for storage.
Generally, the foldable chairs are made of different materials, such as woods, or metals. The wood foldable chair is not concrete. Furthermore, currently, it is difficult to get wood for making chairs. Therefore, most of foldable chairs are made of metals which are concrete and endurable. Further, the comfortability and volume for storage are not main concerns. However, with the improvement of human life, less space can be used for storing chairs. Problems about confortablilty, outlooks, styles, and storage spaces are concerned and improved in current making of foldable chairs so as to have the effects of comfortness, safety, non-falling down of the seat cushion, and less space for overlapping of a plurality of chairs. However, in all these improvements, as a plurality of chairs are overlapped, the thickness of these chairs will be greater or equal to the summation of the individual chairs. Furthermore, as a plurality of chairs are overlapped, no slide-proof structure is designed.
Therefore, there is an eager demand for a novel design which can improve the prior art defects.
Accordingly, the primary object of the present invention is to provide a foldable chairs, which can be overlapped with less spaces and slide proof design is contained in the chairs.
To achieve above object, the present invention provides a foldable chairs having front and rear legs are interactive by using pivotal units. After expansion, top ends of the rear leg are positioned to the rear lower end of the handles of a back cushion. It is stable and safe. After the chair is closed, the front leg is alternative arranged with the rear leg. After a plurality of chairs are closed together, the volume for storing the chairs are greatly reduced and the overall height for storing a chair is reduced. In close state, the legs of the chairs are alternatively arranged with a stable and safe structure. In overlapping of a plurality of chairs, ground retainers of the chairs have the function of slide-proof so that a plurality of chairs can be overlapped stably. As a plurality of chairs are overlapped for storage, they will generate a horizontal resisting force so that the chairs are overlapped stably and safely.
In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
With reference to
A back cushion 2 has a cambered surface which is suitable to resist against a back of a person. Referring to
A seat cushion 5 is illustrated in
As illustrated in
A front leg 1 has a U shape structure with two extending rods. Two distal ends of the front leg 1 are inserted into the hollow cylinders 20 of the back cushion 2 by screwing operation. A lower end of the front leg 1 is installed with at least two ground retainers 11 for reducing the friction between the front leg 1 and ground. A back side of each ground retainer 11 is installed with a positioning unit 12 (see
A rear leg 4 has a U shape. Each of the two distal ends of the rear leg 4 is pivotal to the pivotal holes 32 of the pivotal unit 3 by screwing through the pivotal hole 32 of the pivotal unit 3. A gap between two distal ends of the U shape rear leg 4 is larger than that of the U shape front leg 1. A middle section of each lateral side of the rear leg 4 is pivoted to the pivotal seat 52 of the seat cushion 5. A lower end of the rear leg 4 is installed with at least two ground retainers 41 for reducing the friction between the rear leg 4 and ground. A back side of each ground retainer 41 is installed with a positioning unit 42 (see
Referring to
The present invention is thus described, it will be obvious that the same may be varied in many ways. For example, the slot 11, 12 can be formed directly to the pillar; the pushing head 46 of the tightening unit 4 can be formed like a saddle capable of sitting across the water blocking sheet for better stability. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.