SE539187C2 - Backrest assembly - Google Patents

Abstract

ABSTRACT This invention relates to a back rest assembly (1) for outdoor use, comprising asupporting structure (2,4) and a back rest part (3) including a back rest fabric (30),Wherein the supporting structure (2, 4) comprises at least four tubes (20, 21, 22, 23),Wherein two of the tubes (20, 21) are arranged in outer channels (31, 32) of the backrest fabric (30) on opposite sides of the backrest part (3) so that they fonn together withthe back rest fabric (3 0) an upwardly standing backrest part (3), and Wherein the othertwo tubes (22, 23) are arranged so that they form a bottom support for the back rest part(3); Wherein the supporting structure (2, 4) further comprises a transversal carrier unit(4) arranged to provide support and easily releasable mounting for one end of each ofthe four tubes (20, 21, 22, 23), characterized in that the transversal carrier unit (4) fonnsa form stable body, preferably of a thennoplastic material, and that the transversalcarrier unit (4) has openings (40, 41, 42, 43) for mounting of one end of each one of thefour tubes (20, 21, 22, 23).

Description

BACKREST ASSEMBLY TECHNICAL FIELD This invention relates to a backrest assembly for outdoor use, comprising a supportingstructure and a backrest part including a backrest fabric, wherein the supportingstructure comprises at least four tubes, wherein two of the tubes are arranged in outerchannels of the backrest fabric on opposite sides of the backrest part so that they formtogether with the backrest fabric an upwardly standing backrest part, and wherein the other two tubes are arranged so that they form a bottom support for the backrest part.

STATE OF THE ARTLeisure chairs and back support devices are today usually bulky and /or are oftendifficult to carry. Therefore, many people use simple devices on the beach, i.e. usually without any backrests.

SUMMARY OF THE INVENTIONIt is the object of the present invention, to solve or at least minimize the above- mentioned disadvantages The object of the invention is achieved by a backrest assembly according to the appended claims.

Thanks to the invention, a backrest assembly (a kind of leisure chair) is provided, whichcan be easily handled, which is light in weight and compact in the folded state, so that the backrest arrangement according to the invention is easy to carry/transport.

Moreover, the backrest arrangement of the invention has an ineXpensive construction,which is not based on the conventional, square or rectangular support structure. The costof manufacturing the seat back assembly according to the invention can be kept low.The backrest arrangement according to the invention also has the advantage that it has a smaller footprint, especially when transporting Furthermore, the solution according to the invention provides a convenient backassembly prepared in the new design, which eliminates the need for the presence of a lateral support element for the upper backrest part.

DESCRIPTION OP THE PIGURES In the following the invention will be described in more detail with reference to theaccompanying drawings.

Pig. l is a perspective view obliquely from above of a preferred embodiment of a backrest arrangement according to the invention.

Pig. 2 shows a perspective view obliquely from above of a preferred embodiment of a support structure of the invention.

Pig. 3 shows a perspective view obliquely from above and from behind by one end of a preferred embodiment of a support unit according to the invention.

Pig. 4 shows a perspective view obliquely from above and from one end of a preferred embodiment of a support unit according to the invention.

Pig. 5 is a perspective view obliquely from above and from the front, from one end to a preferred embodiment of a carrier unit according to the invention.

Pig. 6 is a perspective bottom view of a preferred embodiment of a carrier unit according to the invention, and, Pig. 7 is a side view of the rear of the carrier unit.

DETAILED DESCRIPTION OP THE INVENTION Pigure l is a perspective view of a preferred embodiment of a backrest assembly laccording to the invention. The backrest assembly l is intended for use in outdoor areas,for example, when staying at a beach. The backrest assembly l comprises a supportingstructure 2, 4 and a backrest part 3 including a fabric 30. The supporting structure 2, 4comprises support tubes 2 and a transversal carrier unit 4. The support tubes are formedby four tubes 20, 2l, 22, 23. Two of the tubes 20, 2l are on the opposite sides of theback rest fabric 30 arranged in outer channels 3l, 32 incorporated in the fabric 30arranged in the backrest part 3, so that they support an upstanding backrest part 3. Theother two tubes 22, 23 are used as floor supports for the upright backrest part 3.

Pig. 2 shows that the supporting structure 2, 4 further comprises a transversal carrierunit 4, which is so constructed and arranged that it forms an anchorage for one end ofeach of the four tubes 20, 2l, 22, 23. The transversal carrier unit 4 needs to take the necessary forces when using the backrest assembly l. The transversal carrier unit 4 ismade of a forrn stable material, such as wood, metal, plastic, such as a polymer, and/ or a composite material, to be able to form a solid construction.

As illustrated in Figures 3, 4 and 5, the transversal carrier unit 4 is preferably made of adurable therrnoplastic material (for example, polyethylene or polypropylene), so that the cost of manufacturing can be kept low (by moulding or injection moulding).

The transversal carrier unit 4 (see Fig. 2 and 3) is provided with openings 40, 4l, 42, 43which are provided for securing a respective end of four tubes 20, 2l, 22, 23. Two ofthe openings 42, 43 are used for anchoring of two of the tubes 22, 23 horizontally, i.e.arranged so that the two tubes 22 and 23 are in horizontal orientation when attached. In attached form the tubes 22, 23 act as a rear floor support for the backrest part 3.

The other two openings 40, 4l serve for receiving the tubes 20, 2l and are arranged sothat the two tubes 20, 2l can be mounted oriented upwardly. Each of these twoopenings 40, 4l have two receiving options A, B providing two different positions, i.e.two different angle settings for the tubes 20, 2l, and also for the backrest part 3.

The receiving option in position B cooperates with a lateral opening 45 (see Fig. 5) inthe wall of the transversal carrier unit 4, whereby a greater inclination angle adjustmentfor the tubes 20, 2l in the backrest part is enabled. In this position, thanks to the lateralopening 45, a part of the tube end can protrude into the lateral opening 45, whereby thewall parts of the lateral opening 45 act as a support. With this arrangement, the backrestpart 3 can be placed in a second angular position ß (see Fig. 4).

To provide this simple and space-saving arrangement for the tubes 20, 2l in twodifferent angular positions ot, ß and to offer sufficient support surfaces, the twomounting options for the positions A, B are arranged and integrated in the same cavity40, 4l. The first receiving option A, which eXtends into the transversal carrier unit 4further downward (than the other B), enables the upright position of the tubes 20, 2l,and angles the backrest 3 in a-first angular position ot. For this purpose the respectivesupport surfaces for the tubes 20, 2l are located in the lower part of the transversalcarrier unit 4. The second receiving option is position B, protrudes a flatter angle ß ofthe tubes 20, 2l, having support surfaces which are located further up in the support unit4.

As shown in Figs. 3 and 4, the transversal carrier unit 4 in its longitudinal direction,includes a longitudinal opening 46, to accommodate the two tubes 20, 2l in the foldedstate. Thereby, it is possible to obtain a compact, easily transportable package in thefolded state. Adjacent the ends of the transversal carrier unit 4, this opening 46 has asignificantly larger depth, (preferably at least twice as deep) than the depth h in therr1iddle of the transversal carrier unit 4, which, inter alia, offers the advantage that thecentral part of the transversal carrier unit 4 provides a recess for the users back. Further,protruding parts 47, 48 are arranged at the ends of the transversal carrier unit 4, whichinclude the openings 42, 43 for the attachment of the tubes 22, 23. Conveniently, thelength of the transversal carrier unit 4, is designed so that the tubes 22, 23 can beaccommodated between the protruding parts 47, 48 in order to forrn a compact package in the collapsed state.

The transversal carrier unit 4 preferably comprises a recess, which allows storing of thetubes 20, 2l in the collapsed state. Further, the tubes 20, 2l, 22, 23 (see Fig. 7) are pairwise held together by an elongated elastic element 5, via a channel 49 which connectsthe openings 40/42, 4l/43 to each other so that the tubes 20, 2l, 22, 23 are alwaysconnected to the transversal carrier unit 4, but in a way that makes it possible in asimple way and manner, to positioning the tubes 20, 2l, 22, 23 in the various operating positions. The elastic member 5 may for example be a rubber band.

It is apparent from the above description that the transversal carrier unit 4 is an essentialelement of the invention to enable the functionality of the backrest assembly accordingto the invention, with its significant benefits, including, the compact construction, thecompact transportation facility and providing both sitting as also lying positions. The shape of the transversal carrier unit 4 can be described as a shaped body piece.

Thus, transversal carrier unit 4 differs significantly from the cross member unitscommonly used (comprising for example only one tube that is made of a tube with thesame mass as the support tubes). In another embodiment of the invention, thetransversal carrier unit 4 also, at least partially, can be tubular shaped to provide thebasic function of the invention, although this is not so space and weight saving, as the above-described preferred embodiment, a moulded single piece body.

As shown in Fig. 6, the transversal carrier unit 4 is preferably designed thin-walled andhas an M-shaped cross-section, i.e. with four walls 4 ', 4' ', 4' ", 4 " " that essentially eXtend vertically, which perrnits an advantageous flexural stability. To enable even better stability and strength, support plates may be arranged between the Walls in the transverse direction.

Furthermore, many other changes are available that can meet the object of the invention,for example, the structure of the transversal carrier unit 4 made in several parts, Which When assembled form the basic body.

The connection With the rubber bands 5 offers the advantage that no connectionelements such as screWs, nuts, etc. must be used, leading to a further Weight reduction of the device according to the invention.

This design also minimizes the risk that functions and design are negatively affected ofexternal influences, such as by the action of sand, gravel and Water (particularly salt Water) .

Thanks to the design according to the invention it provides additional comfort, becauseof no transversely eXtending hard supporting parts are needed at the upper side of thebackrest 3.

According to a preferred embodiment, tubes are of durable, corrosion-resistant material (e. g. stainless steel) With an outer diameter of l0-20 mm, a Wall thickness of l-2 mm, a length of the tubes 20, 2l of the backrest 3 of 350- 400 mm and a length of the tubes 22,23 of the bottom support 200 to 250 mm. The transversal carrier unit 4 preferably has a length of 400-500 mm, a height H of 60-80 mm at the ends and a height h in the middleof 30-40 mm and a Weight of 300-400 g.

In a collapsed or folded state a compact unit is formed With a length corresponding tothe transversal carrier unit 4 and a cross-sectional dimension of less than l20 mm (l00mm diameter) and With a total Weight (With tissue) of less than l.5 kg, preferably about1 kg.

LIST OF REFERENCE NLTMBERS w l Backrest assemblyß 2. Stupgiæfart tubes ß 3 Backrest part 4 Transversal carrier xini: 4 ', ', ", 4 " " Xfïfalis 5 Eiastic: ekfment 240, 21, 22, 23 Tubæs 3G Backrest fahiic 31, 32 (šutfir channeis of the backrest ifabfic 304G, 41, 42% 43 Opænings 45 Side opaniiig 13-6 Lavngituaiiiiai avpfsning 47, 43 Protruding parts A, B Pavsiti-zwfi optioris ifor tiibes h Elëepth in the middle of the transversal carrier unit 4H Dapth af the opczning 46 49 Channel

Claims (6)

1. A back rest assembly (1) for outdoor use, comprising a supporting structure (2,4) anda back rest part (3) including a back rest fabric (30), wherein the supporting structure(2, 4) comprises at least four tubes (20, 21, 22, 23), Wherein two of the tubes (20, 21)are arranged in outer channels (31, 32) of the back rest fabric (30) on opposite sides ofthe backrest part (3) so that they form together with the back rest fabric (30) anupwardly standing backrest part (3), and Wherein the other two tubes (22, 23) arearranged so that they forrn a bottom support for the back rest part (3); Wherein thesupporting structure (2, 4) further comprises a transversal carrier unit (4) arranged toprovide support and easily releasable mounting for one end of each of the four tubes(20, 21, 22, 23), characterized in that the transversal carrier unit (4) forms a fonn stablebody, preferably of a therrnoplastic material, and that the transversal carrier unit (4) hasopenings (40, 41, 42, 43) for mounting of one end of each one of the four tubes (20, 21,22, 23).

2. The back rest assembly defined in claim 1, characterized in that each one of two ofthe openings (40, 41), have two receiving facilities (A, B) for the tubes (20, 21), toprovide two different angular positions (a ß,) of the tubes (20, 21) of the backrest part (3)-

3. The back rest assembly according to claim 2, characterized in that one of thereceiving facilities (B) for the tubes (20, 21) cooperates with a side opening (45) in the wall of the transversal carrier unit (4).

4. The back rest assembly according to claim 1, 2 or 3, characterized in that thetransversal carrier unit (4) is provided in its longitudinal direction with a longitudinalopening (46) which is dimensioned so that it can receive at least two of the tubes (20,21, 22, 23).

5. The back rest assembly according to claim 1, 2 or 3, characterized in that the tubes(20, 21, 22, 23) at each end of the transverse carrier unit (4) are pair wise connected by an elongated elastic element (5).

6. The back rest assembly according to claim 5, characterized in that the elastic element(5) through an opening (49) that interconnect the two cavities (40/42, 41/43) at each end of the transversal carrier unit (4).