LT2009094A - Kompaktiska kede - Google Patents

Abstract

This invention relates to chairs - special, easy foldable, compact and mobile chair. It not deforms, it can hold relatively big weight (120 kg. or even more). In folded position it takes very little space and is light (1.0 to 1.5 kg). This chair (1)consists of chair seat (2), telescopic pipe-based upper leg (3), connecting sleeve (8), ears (9), axes (10), lower leg (4), cross-shaped connection (12), rod (13), and stretcher (11) made of metal, side stretchers (14) and fastening elements. In unfolded position, this chair (1) takes considerable big space, ensuring comfortable and safe seat. This is achieved by using a special chair construction, which is based on telescopic tubes easy collapsing in to one another and connecting sleeve (8) towhich respectively are fastened upper (3) and lower (4) legs of the chair.

Description

COMPACT BOX

FIELD OF THE INVENTION The present invention relates to chairs, in particular compact, mobile, foldable, foldable, travel chairs, which can be easily folded and placed in a small package.

TECHNICAL LEVEL

The world has long been a chair designed for people to sit on, but over time, and with new demands, new chairs have been created that are different from new features and exceptional designs. A well-known American patent no. US 3674306, published 1972; July 4 This patent describes a compact folding chair with seat, backrest, seat and backrest joints and four legs. This chair is foldable and reminiscent of a diplomat in a folded position: the backrest consists of a seat and the legs folded into the hollow space of the seat. The main advantage of this design is its compactness, but the design of the chair itself is neither stable nor robust.

Another American patent no. US2009167063, published March 2009. July 2 This patent describes a compact folding chair with legs, one of which is attached to the seat at one end and another at a certain angle to the ring-shaped base. Using two types of axial type joints, the legs of the adjacent chairs are connected through their middle part at an angle to form an "X" shape. In this way, the legs connected in the middle rotate in relation to each other, which makes the chair foldable. The above-mentioned ring provides stability to the construction. However, the weakness of this construction is foot joints: one type of connector is screws and the other one is a special nipple. When the chair is folded / folded down, the head is seated, seated and raised, so the bolts quickly wear out. A similar situation is with special necks, as one foot pushes the nipple in one direction and the other in the other. Also, these special sleeves have one more disadvantage: in the case of folding and folding, two legs must move immediately in the nose in two different directions, i.e. additional tension in the inside of the nipples arises: on one side such a chair is very uncomfortable to bend, on the other hand, the nipples receive a relatively high load and are not long-lasting. A well-known American patent no. US4595232, published 1986. June 17 The compact chair described in this patent has a seat, legs and backrest, the extensions of which are easy to fit into specially designed cavities in the seat. The front legs are joined to the respective rear legs to form an "X" shape. The chair folds in the middle of the "X" shape and the backrest is easily detached from the seat by pulling it out of the above cavity. The construction of the leg joints of this chair is simple enough and durable, but the weak point is the backrest attachment: even with a slight human retraction, the above-mentioned seat cavity is subjected to a very high load (lever principle). For this reason, the chair can be easily lowered, and the easily removable back ends of the backrest can cause accidental injury. A well-known American patent no. US4184711, published in 1980. January 22 The folding chair described in this patent consists of a backrest, a material seat and three legs, interconnected in one joint at a distance from the seat at approximately the center of the seat. When the chair is folded down, the legs are at a certain angle. The big plus of this chair is that, when it is folded, it occupies very little space, practically only three bars with a certain expansion in the middle. However, the chair cannot hold a heavy weight, and the leg protrusion is not continuous. When the chair is folded down, the seat plane is usually not horizontal. Another drawback of this design is that the joining of the rods to the material comprises a very small area, so that such a chair is non-continuous.

The closest to the prior art is the American patent no. U.S. Pat. May 2 This patent describes a folding chair based on the left and right A-shaped frames. Each A-frame consists of two legs, which are connected to their upper ends by the axis. The crossed straps are connected axially to the A-shaped leg with the lower straps and fastened using the special sockets to the upper part of the legs. The seat and backrest are interconnected through the axle. The chair is very easy to fold by lifting it behind a special connector that has its ends attached to the upper legs. However, the chair is not easily foldable because it has a large number of 3 all-or-nothing connections and additional joints, which must be positioned accordingly when the chair is folded down. In this construction, particularly weak joints are located at the bottom, connecting the frame of the A-frame with the "X" formwork rods. Due to its A-shape construction, the seat's area of contact with the feet is very small, which makes the seat easy to tear. PRINCIPLE OF THE INVENTION The object of the present invention is a special folding compact chair which, without any deformation, can easily hold a high weight (120kg and even more), while the folded position would be extremely low (1.5-2.0 bottles of mineral water) with little lever (only 1.0-1.5 kg), with a large enough area to be folded down, comfortable to sit on, folded easily and comfortably and folded out. This is achieved by using a special chair construction, which is based on telescopic tubes, which are easy to set apart, and a connecting sleeve, to which the upper and lower legs are attached, respectively.

An essential feature of the present invention is that such a particularly compact foldable chair, when folded, is very stable, maintains a relatively high weight and does not deform.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. Figure 1 illustrates the construction of this folding chair (side view, from above).

FIG. Figure 2 illustrates the construction of this folding chair (side view, more from the bottom). 4

BEST IMPLEMENTATION OPTIONS

As is well known, there are a wide variety of foldable, foldable and similar compact chairs of various shapes and types, based on the seat, legs and sometimes the back.

FIG. Figure 1 shows a compact chair (1) with a seat (2), legs (3, 4), and fastening details. the seat (2) of this compact chair (1) consists of a square resilient tough material (5), the ends of which are fixed to the fastening elements (6) of the chair frame. Also, the material (5) of this seat is additionally reinforced by diagonal straps (7) sewn from the edges. At best, the seat material (5) is made of "cordura" material and the reinforcing belts are made of capron. The legs (3) of telescopic tube-based upper chairs are fastened to the chair frame fastening elements (6) from below. They are made up of telescopic tubes that are easy to stack to one another, thus reducing the construction gauge in the folded position. Telescopic tubes can be of any shape: round, square, trapezoidal, triangular and other. The upper legs (3) of the chair, made of a Π-shaped profile, further (as the sides of the pyramid) fit into the junction, the function of which is performed by a special sleeve (8).

The corresponding parts of the telescopic tube-based upper leg (3) can protrude from one another and slide into each other. In this way, the length of the upper legs (3) of the chair is reduced in the folded position. When the telescopic tubes are fully displaced by means of cylindrical outlet / incoming locks, they lock and form a solid composition where the square seat material (5) also performs tension function.

The lugs (9) are attached to the sides of said sleeve (8), with two lugs per leg. These lugs (9) are provided with drilled holes and fixed axes (10) on which the lower parts of the upper legs (3) are attached. Such joining of the upper legs (3) with said sleeve (8) allows them to be folded parallel to one another.

Also, the lower legs (4) are attached at the bottom of the above-mentioned ears (9), which, like the sides of the pyramid, are extended (unfolded) downwards at a certain angle. The lower parts of the lower legs (4) are provided with metal tensioners (11) which connect and form a cross-shaped joint (12). This cross-shaped connection (12) in the center has a hole in which a rod (13) is attached to the lower end. The upper end of said rod (13) is fixed to said sleeve (8). By connecting such a rod (13), the lower legs (4) fold and fold at the same time as the umbrella spokes.

The upper legs (3), the lower legs (4), the sleeve (8) and the rod (13) form the frame of the chair (1). This frame is made of profiled duralium, hard metal or plastic, or other material of similar strength. It can also be made of composite materials (composites).

In order to make the chair (1) even stronger and more stable, four side tensioners are attached to the respective seat frame fastening elements (6), which at other ends are fastened to the lower parts of the lower legs (4). The side tensioners (14) are made of a resilient material such as a capron belt, cord and the like. The side tensioners (14) can also be made of solid material, as it is technically easy to make them fold in the fold of the chair. Also, these side tensioners (14) can be self-contained to facilitate chair folding and folding. This compact chair differs from other chairs of this kind, especially in the fact that it occupies extremely little space in a folded position. It can therefore be placed in any basket, backpack or even attached to the belt.

On the other hand, in the unfolded position, it has the normal dimensions of the chair, both in width and height. At best, the chair area is approximately 460x460 mm2, and the height from floor to chair frame fastening elements (6) is approximately 460mm. The height of the chair from the floor to the center of the seat (2) is slightly lower and at best is approximately 340mm.

Although this chair (1) weighs only 1.5kg, but its construction makes it easy to maintain 120kg. The upper (3) and lower legs (4) of the chairs ensure the necessary stability. With lighter materials, the weight of the chair can be reduced by at least 30%.

FIG. Fig. 2 shows the same construction of the foldable chair, but more from the bottom, in order to better see its more difficult-to-see nodes. 1.

Claims (6)

6 DEFINITION DEFINITION 1. Compact chair with seat, legs and fastening elements, consisting of: - square seat seats made of elastic material (5), the ends of which are fixed to the fastening elements of the chair frame (6), wherein the seat material (5) is reinforced by diagonal and snap-fastened straps (7); - upper legs based on Π-shaped telescopic tubes, which are easy to stack together, where their respective upper ends are secured to the fastening elements (6) of the chair frame, and the lower ends fit into a connecting piece, the function of which is provided by a special sleeve (8); - lower legs, the respective upper parts of which are attached to a special sleeve (8), and their respective lower parts are unfolded at a certain angle; - side tensioners whose upper ends are fastened to the fastening elements of the chair frame and the lower ends are attached to the lower parts of the lower legs (4); - metal tensioners which connect the lower parts of the lower legs (4) and form a cross-shaped joint (12). - a rod (13) connecting the center of the cross-shaped connection (12) with the special sleeve (8); wherein the ears (9) are attached to the special sleeve (8) using the axle (10), to which the lower parts of the upper legs (3) and the upper parts of the lower legs (4), respectively, are attached so that they can fold parallel to each other in relation to this. 2. Compact chair according to claim 1, characterized in that its seat (2) is made of durable elastic material, at best, the seat material is made of "cordura" material and the reinforcing belts are made of capron. 7 3. A compact chair according to claims 1 to 2, characterized in that the telescopic tubes are of any shape: round, square, trapezoidal, triangular, polygonal, and the like. 4. Compact chair according to claims 1 to 3, characterized in that the body of the chair, comprising the upper legs (3), the lower legs (4), the bush (8) and the rod (13), is made of profiled duralumin, solid metal or plastic, composite materials. 5. Compact chair according to claims 1-4, characterized in that the side tensioners (14) of the chair are self-contained. 6. Compact chair according to claims 1-5, characterized in that the side tensioners (14) of the chair and the metal tensioners (11) are made of a resilient material, e.g. capron belt, cord and the like.