NL2018128B1 - Folding chair - Google Patents

Abstract

The invention relates to a folding chair comprising a backrest, a seat surface and a foot support, wherein the foot support is releasably fastened to the seat surface, wherein the seat surface comprises a frame formed from a profiled part, wherein the profiled part comprises free ends pointing in the direction of the foot support, wherein first connection elements are disposed in the free ends and are in engagement with second connection elements attached to the foot support.

Description

© 2018128

Patent center

The Netherlands

BI PATENT (51) Int. CL:

A47C 4/00 (2017.01) (21) Application number: 2018128 © Application submitted: 05/01/2017

(30) Priority: (73) Patent holder (s): 30/08/2016 DE 202016104757.9 ZHEJIANG HENGFENG TOP LEISURE CO., LTD. at Zhejiang Wukang Town, China, CN. (T) Application registered: 09/03/2018 (72) Inventor (s): Baoqing Yang in Hangzhou (CN). (43) Application published: (74) Agent: Patent granted: ir. H.Th. van den Heuvel et al. 09/03/2018 in 's-Hertogenbosch. (45) Patent issued: 09/03/2018

© Folding chair © The invention relates to a folding chair including a backrest, a seat surface and a foot support, the foot support is releasably fastened to the seat surface, the seat surface comprises a frame formed from a profiled part, the profiled part comprises free ends pointing in the direction of the foot support, where first connection elements are arranged in the free ends and are in engagement with second connection elements attached to the foot support.

NL BI 2018128

This patent has been granted regardless of the attached result of the research into the state of the art and written opinion. The patent corresponds to the documents originally submitted.

Folding chair

The invention relates to a folding chair including a backrest, a seat surface and a foot support, the foot support is really fastened to the seat surface, the seat surface comprises a frame formed from a profiled part, the profiled part includes free end pointing in the direction of the foot support, where first connection elements are disposed in the free ends and are in engagement with second connection elements attached to the foot support.

Folding chairs of the stated type are predominantly used as camping chairs.

The advantage of folding chairs is that they can be folded up compactly and by reason of the separately fastenable foot support, providing comfortable seating. It is possible to use the folding chair in two ways. Without the foot support and with the backrest raised, the folding chair forms a conventional chair, whereas the folding chair with the foot support suspended thereon and with the backrest folded down forms a recliner. In this respect the folding chair offers various usage possibilities.

In order to fasten the foot support it has previously been necessary to remove stoppers disposed in the free ends of the profiled part and to fasten fixing elements at that location instead. This is carried out by the user according to requirements. It was also necessary, in addition to the folding chair and foot support, also to carry the fixing elements and, during use as a recliner, to store the stoppers which are fastened in the free ends. If the fixing elements were lost it was no longer possible to use the folding chair as a recliner with the foot support fastened thereto.

The object of the invention is to provide a folding chair which offers variable sitting options and which is easy to operate.

This object is achieved by the features of claim 1. The dependent claims refer to advantageous expires.

In the folding chair intended to achieve the object, the first connection elements are captively held in the profiled part. In accordance with the invention, the first connection elements form an attachment option for the foot support and, furthermore, the connection elements close the free ends of the profiled part. For example, the connection elements in a single element assume the function of the stopper and the fixing element. Owing to the fact that the first connection elements are captive hero in the profiled part, it is no longer possible to remove them unintentionally. Furthermore, it is no longer necessary to provide separate storage for fixing elements.

Fastening elements can be disposed in the free ends of the profiled part. These are pushed into the interior of the profiled part during manufacture of the folding chair and are heroes preferably in a non-positive manner. In order to improve the fastening arrangement, the fastening elements can also be held in the profile in a positive-locking manner or the profile can be deformed in regions so as to produce a positive-locking arrangement. Owing to the fact that the fastening element is a separate component, favored and easily-produced profiled parts are used.

The profiled parts preferably consist of a metal material e.g. aluminum.

The fastening element can be provided with an internal thread. This permits particularly simple penetration of the first connection element into the free end of the profiled part.

The first connection element can be formed as a threaded stopper and comprises a threaded portion. The formation as a threaded stopper means that the profiled part is closed in the region of the free ends so that absolutely no dirt can penetrate into the profiled part at that location. A particularly simple-to-operate first connection element is produced by the connection or the first connection element to the fastening element via a thread.

The first connection element can be a collar at the end protruding from the profiled part. The external diameter of the collar thus preferably according to the external diameter of the profiled part so that a seamless transition is produced between the profiled part and the first connection element. A stop is produced by the collar so that the first connection element cannot be rotated into the profiled part to any random depth. The first connection element can include a cross-sectional thickening at the end inserted into the profiled part. Furthermore, the first connection element can include a cross-sectional narrowing between the threaded portion and the cross-sectional thickening. A fixing element can be allocated to the profiled part and protrudes into the interior of the profiled part into the region or the cross-sectional narrowing.

The cross-sectional narrowing in conjunction with the threaded portion and the cross-sectional thickening form undercut into which the fixing element engages.

In one simple embodiment, the fixing element is a screw which is screwed into a bore introduced into the peripheral wall of the profiled part.

The fixing element prevents the first connection element from being rotated completely out of the profiled part. The first connection element can be rotated out of the profiled part only until the fixing element comes into contact with the cross-sectional thickening. This position forms the second end position of the first connection element and is at the same time the receiving position into which the first connection element is brought when the foot support is fastened to the folding chair.

If the folding chair is used without the foot support, the first connection elements are rotated into the profiled part until the collar comes into contact with the profiled part. If the folding chair is used with the foot support, the first connection elements are rotated until the fixing elements are in contact with the cross-sectional thickening. In this position, the first connection elements can be connected to the second connection elements.

The second connection element can be formed in a U-shape. The foot support is also preferably provided with a frame which is formed from a profiled part.

The second connection elements are likewise allocated to the free ends of the profiled part. Owing to the fact that the second connection elements are Ushaped, they can be placed on the first connection elements in a particularly easy manner. In this way, the foot support can be fastened to the seat surface in a user-friendly manner.

The second connection element can be an orifice for receiving the collar. Thus, when the foot support is fastened to the seat surface, the collar protrudes at least partially through the orifice so that the second connection element is a hero on the first connection element in a positive-locking manner. In order to release the foot support it is necessary to remove the second connection element from the first connection element in the radial direction.

The first connection element and the second connection element can be formed from synthetic material. The fastening element can be formed from synthetic material. It is possible to produce these elements cost-effectively by an injection molding process. By selection of a suitable synthetic material such as polyamide (PA), durable elements which can be obtained withstand loading.

Some more or the folding chair in accordance with the invention will now be explained in more detail with the aid of the figures. The figures illustrate, in each case schematically:

FIG. 1 a folding chair;

FIG. 2 the folding chair in the region of the first connection element and of the second connection element, the first connection element being screwed in; FIG. 3 the embodiment in accordance with figure 2, where the first fastening element is screwed out;

FIG. 4 the embodiment in accordance with figure 3, where the second connection element is placed on the first connection element.

The figures show a folding chair 1 including a backrest 2, a seat surface 3 and a foot support 4, being the foot support 4 is releasably fastened to the seat surface 3. The seat surface 3 comprises a frame 6 formed from a profiled part 5 , the profiled part 5 comprises free ends 7 pointing in the direction of the foot support 4.

The folding chair 1 is composed of various U-shaped frame sections which form the backrest 2, the seat surface 3, the foot support 4 and the chair leg sections

17. The pipe sections are connected to one another via joints so that the folding chair can be folded up for transportation. The inclination of the backrest 2 can be adjusted. The inclination is adjusted through a grating attached to the armrests

18. In the present case, the profiled parts 5 are round profiled parts made from aluminum.

First connection elements 8 are arranged in the free ends 7 and are in engagement with second connection elements 9 attached to the foot support 4.

The first connection elements 8 are captively held in the profiled part 5. Fastening elements 11 are arranged in the free ends 7 of the profiled part 5 are in order to receive the first connection elements 8. The fastening elements 11 are provided with an internal thread.

The first connection element 8 is formed as a threaded stopper and comprises a threaded portion 10. The first connection element 8 comprises a collar 12 at the end protruding from the profiled part 5. The collar 12 forms, on the one hand, a closure with respect to the profiled part 5 and, on the other hand, a handle for operating the first connection element 8.

The first connection element 8 comprises a cross-sectional thickening 13 at the end inserted into the profiled part 5. Between the threaded portion 10 and the cross-sectional thickening 13 the first connection element 8 is provided with a cross-sectional narrowing 14. A fixing element 15 is allocated to the profiled part 5 and protrudes into the interior of the profiled part 5 into the region of the cross-sectional narrowing 14.

In the case of the connection element 8 screwed into the profiled part 5, an annular chamber is formed in the region of the cross-sectional narrowing 14, into which chamber the fixing element protrudes.

In a first end position 19, the first connection element 8 is screwed into the profiled part 5 until the collar 12 comes into contact with the free end of the profiled part 5. In the first end position 19, the folding chair 1 is used without a foot support 4. In the second end position 20, the first connection element 8 is screwed out of the profiled part 5 until the fixing element 15 comes in contact with the cross-sectional thickening 13. The first connection element 8 cannot be screwed out or the profiled part 5 further than as far as the second end position 20. In the second end position 20, the foot support 4 can be suspended in the folding chair 1.

The second connection element 9 is formed in a U-shape and comprises an orifice 16 to receive the collar 12 or the first connection element 8.

The first connection element 8, the second connection element 9 and the fastening element 11 are formed from synthetic material and produced by an injection molding process.

Figure 1 shows a full illustration of the folding chair 1. The backrest 2 and the seat surface 3 can be provided with upholstery or a cover, according to choice.

Figure 2 shows the folding chair in the region of the connection elements 8, 9, where the first connection element 8 is located in the first end position 19.

Figure 3 shows the folding chair in the region of the connection elements 8, 9, where the first connection element 8 is located in the second end position 20.

Figure 4 shows the folding chair 1 in the region of the connection elements 8, 9, the first connection element 8 is located in the second end position 20 and the foot support 4 is suspended in the seat surface 3 or the folding chair 1 It is clear that the collar 12 or the first connection element 8 protrudes partially through the orifice 16 in the second connection element 9. In this way, a positive-locking connection of the first connection element 8 and second connection element 9 is produced.

Claims (11)

Conclusions A folding chair (1) comprising a backrest (2), a seat surface (3) and a foot support (4), wherein the foot support (4) is releasably attached to the seat surface (4), the seat surface (3) being a frame (3) 6) comprises formed from a profiled part (5), the profiled part (5) comprising free ends (7) pointing in the direction of the foot support (4), the first connecting elements (8) in the free ends (7) ) are arranged and are in engagement with second connecting elements (9) attached to the foot support (4), characterized in that the first connecting element (8) is enclosed in the profiled part (5). Folding chair according to claim 1, characterized in that a fastening element (11) is arranged in the free end (7) of the profiled part (5). Connecting element according to claim 2, characterized in that the fixing element (11) is provided with an internal screw thread. Folding chair according to one of claims 1 to 3, characterized in that the first connecting element (8) is formed as a threaded plug and comprises a threaded portion (10). Folding chair according to one of claims 1 to 4, characterized in that the first connecting element (8) at the end protruding from the profiled part (5) comprises a collar (12). Folding chair according to one of Claims 1 to 5, characterized in that the first connecting element (8) in the end received in the profiled part (5) comprises a transverse thickening (13). Folding chair according to claim 6, characterized in that the first connecting element (8) comprises a transversal narrowing (14) between the threaded portion (10) and the transverse thickening (13). Folding chair according to claim 7, characterized in that a fixation element (15) is assigned to the profiled part (5) and protrudes into the interior of the profiled part (5) in the region of the transverse narrowing (14). 5 Folding chair according to one of claims 1 to 8, characterized in that the second connecting element (9) is formed in a U-shape. 10. Folding chair according to claim 9, characterized in that the second connecting element (9) comprises an opening (16) for receiving the collar 10 (12). Folding chair according to one of claims 1 to 10, characterized in that the first connecting element (8) and the second connecting element (9) are formed from synthetic material. 1/4