DE102019118436A1 - Volume element, in particular water sports equipment - Google Patents

Abstract

The invention relates to a volume element (10) with at least one first chamber (12) that can be filled with a gas and thereby inflated, which is at least partially delimited by an inherently flexible first wall (14), with at least one that can be filled with the gas and thereby inflatable second chamber (16) which is delimited partly by the first wall (14) arranged between the first chamber (12) and the second chamber (16) and partly by a second wall (18) which is pliable in itself, and with at least one third chamber (20) which can be filled with the gas and thus inflated, which is at least partially enclosed by a third wall (22) which is arranged between the second chamber (16) and the third chamber (20) and partially delimiting the second chamber (16) ) is limited, wherein: - the first wall (14) is connected to the second wall (18) at at least one first connection point (P1), - the second wall (18) to the third Wall (22) is connected in at least one second connection point (P2), - the first wall (14) and the third wall (22) in at least one third connection point (P3) with at least one per se pliable and the first chamber (12) or the fourth wall (24, 26) of the volume element (10), which partially delimits the third chamber (20), and - in the unstretched and / or uninflated state of the volume element (10), the sum of a distance from the third connection point (P3) up to the first connection point (P1) continuously extending first length (L1) of the first wall (14) and from the third connection point (P3) to the second connection point (P2) continuously extending second length (L2) of the third wall ( 22) corresponds to a third length (L3) of the second wall (18) extending continuously from the first connection point (P1) to the second connection point (P2).

Description

The invention relates to a volume element, in particular a water sports device.

A volume element in the form of a water sports device is already the US 2009/0049757 A1 as known. The volume element is referred to there as a sandwich bar, which can be inflated with a gas. For this purpose, the sandwich bar has a core with at least one inner chamber which can be inflated with the gas. The inner chamber is delimited by an inherently at least essentially rigid material. Also the FR 2 516 887 a volume element designed as a water sports device can be seen as known. Also from the DE 31 09 016 A1 , the DE 88 05 969 U1 and the DE 20 2012 005 185 U1 water sports equipment are known.

It has been shown that the production of, for example, advantageous but complex geometries or structures of volume elements such as inflatable water sports devices is not possible or only possible with great effort. Such complex geometries, in particular variable thickness distributions, have hitherto not been or not sufficiently inexpensive and thus cannot be implemented in large series. Such geometries, in particular complex geometries, are desired and advantageous, however, in order to realize advantageous properties of the volume element when it is used as or for a water sports device. Usually there is the problem that the volume element has excessive folds in its gas-inflated state. Such folds can impair the visual impression of the volume element, but also its properties, in particular when the volume element is used as or for a water sports device. Such a production of the volume element that the volume element in its inflated state has no or only slight folds while realizing a particularly advantageous but complex geometry or structure of the volume element has so far not been possible or is very complex and therefore time-consuming and costly.

The object of the present invention is therefore to provide a volume element which can be inflated with a gas and which can also produce a complex geometry or structure of the volume element in a particularly time-saving and cost-effective manner.

This object is achieved by a volume element with the features of claim 1. Advantageous refinements with expedient developments of the invention are specified in the remaining claims.

The volume element according to the invention has at least one first chamber which can be filled with a gas, in particular air, and thus inflated, which is at least partially delimited by a first wall that is pliable and thus unstable in shape. In addition, the volume element has at least one second chamber, which can be filled with the gas and thus inflated, which is partly pliable and therefore unstable in shape through the first wall arranged between the first chamber and the second chamber and partly through a per se, that is to say on its own second wall is limited. For example, the second wall is formed separately from the first wall.

The volume element also has at least one third chamber that can be filled with the gas and thereby inflated, which is at least partially pliable and pliable by a second chamber which is arranged between the second chamber and the third chamber and partially delimits the second chamber thus form-unstable third wall is limited. For example, the third wall is formed separately from the second wall and / or separately from the first wall. The respective wall is formed, for example, from one or by a per se, that is to say viewed on its own, pliable and thus dimensionally unstable surface element, such as a material web simply also referred to as a web.

The first wall is connected to the second wall in at least one first connection point. The second wall is connected to the third wall in at least one second connection point. The first wall and the third wall are connected in at least one third connection point to at least one inherently, that is to say considered by itself, pliable and thus dimensionally unstable and partially delimiting the first chamber or the third chamber of the volume element. In particular, it is conceivable that the fourth wall is formed by one or from an inherently, that is to say viewed individually, pliable and thus dimensionally unstable surface element such as a web or material web. The first wall and the third wall can be formed in one piece with one another, or the first wall and the third wall are formed separately from one another. The second wall is, for example, formed separately from the first wall and / or separately from the second wall and / or separately from the fourth wall. The fourth wall is, for example, separate from the first wall and / or separate formed by the third wall. In the context of the invention, the respective connection point is to be understood as a connection point, also referred to simply as a point, which of course does not necessarily have to have an exactly one-dimensional extent like a point in the mathematical sense. At or in the respective point, that is to say at the respective connection point, the respective walls are connected to one another, for example by gluing and / or sewing and / or welding.

Furthermore, it is provided according to the invention that, in the unstretched and / or uninflated state of the volume element, the, in particular mathematical, sum of a first length of the first wall extending continuously from the third connection point to the first connection point, i.e. without interruption, and a length of the third connection point to the second connection point continuously, that is, uninterrupted, extending second length of the third wall corresponds to a third length of the second wall extending continuously and thus uninterrupted from the first connection point to the second connection point. In other words, for example, the first length of the first wall becomes L1, the second length of the third wall becomes L2 and the third length of the second wall with L3 according to the invention: $$\text{L1 + L}2=\text{L.}3.$$

It is preferably provided that the first length, the second length and the third length are each greater than zero. The unstretched state of the volume element is to be understood as meaning that the volume element is not stretched and thus not, in particular elastically, deformed. In other words, no forces that lead to an expansion of the volume element then act on the volume element and / or in the volume element. In the unstretched state, the volume element can not be filled with the gas or only lightly or with a small amount of gas, but in such a way that the volume element is still unstretched. The non-inflated state of the volume element is to be understood as meaning that the volume element is not inflated with the gas, so that no gas is received in the volume element. In particular, for example, the volume element assumes its unstretched state when the volume element is simply uninflated and unstretched on a floor or table without external forces acting on the volume element and without the volume element being inflated or filled with the gas in such a way that the Volume element is stretched.

The invention is based on the knowledge that on the one hand a particularly simple and thus time-saving and cost-effective manufacture of the volume element, in particular in the context of a mass or series production, can be realized through the lengths described and in particular their relationship to one another. In particular, the volume element in its uninflated and unstretched state can be produced in a particularly simple and thus time-saving and cost-effective manner, in particular in the context of series and / or mass production. On the other hand, a complex geometry or structure of the volume element can be implemented, in particular in its inflated state. In other words, an advantageous outer shape and / or, in particular variable, thickness distribution of the volume element can be created, which has the complex geometry, structure, shape and / or in particular variable thickness distribution in its inflated and in particular and / or stretched state.

In order to be able to realize on the one hand a particularly simple production and on the other hand a complex geometry, structure and / or shape of the volume element, it is provided in one embodiment of the invention that at least when the volume element is not inflated, the first wall and the third wall along a straight line connect, wherein the first connection point and the second connection point are spaced from one another along a straight line, and wherein at least in the deflated and / or unstretched state of the volume element, the third connection point in a plane perpendicular to the straight line and between the first connection point and the second connection point, especially on the straight line itself.

In order to be able to realize a particularly simple production, it is provided in a further embodiment of the invention that the first chamber, the second chamber and the third chamber are fluidically connected to one another.

Another embodiment is characterized in that the first wall has at least one through opening, via which the first chamber is fluidically connected to the second chamber. A particularly advantageous and simple production can thereby be realized since, for example, excessive sealing and / or piping measures can be avoided.

In order to be able to realize a particularly simple production, it is provided in a further embodiment of the invention that the third wall has at least one passage opening via which the second chamber is fluidically connected to the third chamber.

In order to be able to keep the number of parts and thus the costs of the volume element, in particular for its production, particularly low, it is provided in a further embodiment of the invention that the first wall is formed in one piece and / or that the second wall is formed in one piece and / or that the third wall is formed in one piece.

It has been shown to be particularly advantageous if the first wall is formed in one piece with the third wall. As a result, the number of parts and thus the costs can be kept particularly low.

In a further embodiment of the invention, the second wall is formed separately from the first wall and / or separately from the third wall. As a result, the volume element can be produced in a particularly simple and thus time-saving and cost-effective manner, for example by assembling the second wall with the first wall and / or with the third wall. In particular, the surface element forming the second wall, which is inherently slack, is combined with the surface element formed separately from it and forming the first wall and / or with the surface element formed separately from it and forming the third wall and is connected, in particular at their respective connection points .

In order to realize a particularly advantageous shape or geometry or structure of the volume element in a particularly simple and inexpensive manner, it is provided in a further embodiment of the invention that the second wall in the inflated state of the volume element is different from a flat shape, in particular curved and very particularly outwardly or convexly curved shape.

In a further embodiment of the invention it is provided that the second wall is not connected to the first wall or the third wall along the entire third length. This allows the production costs to be kept particularly low.

In a further embodiment of the invention it is provided that the second wall is formed from an airtight material. In this way, excessive sealing measures can be avoided, so that the volume element can be produced in a time-saving and cost-effective manner.

In a particularly advantageous embodiment of the invention, it is provided that the first wall and / or the third wall are formed from an air-permeable material. In this way, for example, sealing measures and material costs can be kept within a particularly low range.

A further embodiment is characterized in that on a side of the second wall facing away from the first wall and the third wall there is arranged a casing element, in particular formed separately from the walls. In this way, on the one hand, an advantageous geometry of the volume element can be created and, on the other hand, a surface that is advantageous for a person, for example, can be created on which the person can sit and / or stand, for example, particularly advantageously. The enveloping element is preferably a pliable and thus dimensionally unstable surface element per se and thus on its own, which is preferably formed separately from the aforementioned surface elements forming the walls and can thus also be a web material.

At least one cavity or intermediate space is preferably arranged between the envelope element and the second wall, which is preferably at least partially, in particular at least predominantly or completely, filled with a filler material. The filling material is preferably formed separately from the walls and separately from the enveloping element and is additionally provided. The filler material is preferably formed from a plastic, in particular from an elastomer and particularly preferably from polyurethane or silicone or the like. In particular, the space is injected with the filler material or the filler material is injected into the space, for example. By using the filling material in the gap, a particularly high rigidity and a particularly smooth surface can be created.

The enveloping element preferably forms, at least in the inflated state of the volume element, a flat surface facing away from the walls, on which the aforementioned person can particularly advantageously sit and / or stand.

It has also been shown to be particularly advantageous if the respective walls are connected to one another by sewing and / or gluing and / or welding. This allows the costs to be kept particularly low.

Finally, it has been shown to be particularly advantageous if the volume element is designed as a water sports device, in particular as a surfboard, as a swimming island, as an air mattress or the like.

It has also been shown to be advantageous if, in the inflated state of the volume element, the second chamber is arranged at least partially, in particular at least predominantly or completely, between the first chamber and the third chamber along said straight line. In this way, both a particularly simple manufacture and a particularly advantageous geometry or structure of the volume element can be created. In particular, the aforementioned structure or geometry of the volume element has a different or varying thickness distribution. This is to be understood in particular that, for example, the volume element has a first length area with a first thickness along its longitudinal extent and / or along its transverse extent and a second length area adjoining the first length area with a second thickness different from the first thickness, so that the second thickness is greater or less than the first thickness. The respective thickness runs, for example, at least substantially along a direction of extent and is related to the inflated state of the volume element, the direction of extent, for example, in the inflated state of the volume element running at least substantially perpendicular to the aforementioned surface formed by the enveloping element.

The invention is based in particular on the following findings: In the field of inflatable products, the so-called drop-stitch material (spacer fabric) is used for many applications such as stand-up paddle boards, boat floors, etc. These are two layers of woven or knitted fabrics which are connected to one another via spacer threads or spacer fibers. The spacer fabric, which is coated with an air-impermeable layer such as PVC or PU for inflatable products, forms a flat shape when inflated. The fibers or threads, which each have the same length, prevent the product from assuming a round shape. The disadvantages of the drop stitch technologies, however, are that a varying length of the spacer threads could not be represented up to now. It has therefore not been possible to date with this technology to manufacture the products with a varying thickness distribution. Such a varying thickness distribution is particularly advantageous for properties of the volume element, in particular when it is used in or as a water sports device. Furthermore, products in the drop-stitch design have a low flexural rigidity, which is why corresponding products are very thick and have a thickness of 6 inches, that is to say about 15 centimeters. In addition, products with a drop-stitch design have poor cushioning properties. In the case of corresponding products, vibrations only subside very slowly.

The invention can now overcome at least the greatest disadvantages of drop stitch technology. The volume element has, for example, at least two tubes arranged next to one another, in particular in the transverse direction of the volume element running perpendicular to the longitudinal extension of the volume element, and which can be filled with the gas and thus inflated, wherein, for example, a first of the tubes has or forms the first wall and possibly the fourth wall, and the second tube forms or has, for example, the third wall and optionally the fourth wall. The tubes are formed, for example, by tube elements which, for example, are formed separately from one another. The first tube element or the first tube is formed, for example, by at least two layers arranged one above the other, formed from a material that is inherently pliable and connected to one another along at least one seam. The second tube element or the second tube is formed, for example, by at least two layers arranged one above the other, formed from a material that is inherently pliable and connected to one another along at least one second seam. The tube elements are provided, for example, in such a way that the seams are arranged on mutually facing sides of the tube elements and have mutually different curvatures at least in respective length regions.

For example, the tubes have respective free ends, the tube elements being provided in such a way that the free ends are spaced apart from one another, and the ends are moved towards one another so that before the tube elements or the volume element as a whole are or is inflated, the volume element a has three-dimensional shape, which resembles the shape of a kayak or a canoe, and wherein, as soon as the tubular elements or the tubes are inflated with the gas, the shape of a kayak or canoe-like shape of the volume element disappears or decreases and the volume element on its upper - and the underside becomes even or flat. The invention therefore includes a method for producing a volume element according to the invention.

For example, by changing or varying the diameter of the tubes along their direction of extent, in particular the direction of longitudinal extent, a corresponding and, in particular, in the direction of longitudinal extent of the tubes and thus of the volume element can be varied Achieve the thickness distribution of the volume element. The tubes or tube elements form a tube structure that is encased, for example, by at least one or more further air-impermeable layers, such as the aforementioned envelope element.

In particular, the invention makes it possible to create a type of tube cluster which can reproduce the shape of complex object shapes. In particular, the invention makes it possible to create very high flexural strengths and good damping properties without the use of granules. As a result, the weight and the installation space requirement or the pack size of the volume element, in particular in its deflated state, can be kept low. In addition, a single-chamber system can be created so that in principle undesired, but possibly occurring leakages within the volume element are not critical. Under such leakages within the volume element, for example, basically undesired or unintended fluidic connections are provided between the chambers, which however only cause an overflow of gas or air within the volume element and thereby between the chambers, but not cause the gas to escape to the outside. that is, lead to an area surrounding the volume element. Leaks in the vicinity of the volume element can easily be repaired from the outside. It is not necessary to repair leaks within the volume element. In particular, the tube cluster can be used to create a type of inflatable supporting structure, as a result of which a high level of flexural rigidity and good damping can be achieved. In addition, the production of the volume element can be easily automated so that the volume element or several volume elements can be produced simply and inexpensively.

Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawing. The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination, but also in other combinations or on their own, without the scope of Invention to leave.

• 1 eine schematische Draufsicht eines als Wassersportgerät, insbesondere als Surfbrett, ausgebildeten, erfindungsgemäßen Volumenelements gemäß einer ersten Ausführungsform;
• 2 eine schematische Schnittansicht des Volumenelements gemäß 1 entlang einer in 1 gezeigten Schnittlinie A-A;
• 3 eine weitere schematische Schnittansicht des Volumenelements, wobei 3 der Erläuterung einer Herstellung des Volumenelements dient;
• 4 ausschnittsweise eine schematische und vergrößerte Darstellung eines Bereichs des Volumenelements gemäß 1 bis 3;
• 5 eine weitere schematische Schnittansicht des Volumenelements gemäß 1 bis 4;
• 6 eine schematische Schnittansicht des Volumenelements gemäß einer zweiten Ausführungsform;
• 7 eine schematische Schnittansicht des Volumenelements gemäß einer dritten Ausführungsform;
• 8 eine schematische Schnittansicht des Volumenelements gemäß einer vierten Ausführungsform;
• 9 eine schematische Schnittansicht des Volumenelements gemäß einer fünften Ausführungsform;
• 10 eine schematische Schnittansicht des Volumenelements gemäß einer sechsten Ausführungsform; und
• 11 eine weitere schematische Schnittansicht des Volumenelements gemäß einer sechsten Ausführungsform, wobei 11 der Erläuterung einer Herstellung des Volumenelements gemäß der sechsten Ausführungsform dient.

The drawing shows in:

• 1 a schematic top view of a volume element according to the invention embodied as a water sports device, in particular as a surfboard, according to a first embodiment;
• 2 a schematic sectional view of the volume element according to 1 along an in 1 section line AA shown;
• 3 a further schematic sectional view of the volume element, wherein 3 serves to explain a production of the volume element;
• 4th a section of a schematic and enlarged illustration of a region of the volume element according to FIG 1 to 3 ;
• 5 a further schematic sectional view of the volume element according to FIG 1 to 4th ;
• 6th a schematic sectional view of the volume element according to a second embodiment;
• 7th a schematic sectional view of the volume element according to a third embodiment;
• 8th a schematic sectional view of the volume element according to a fourth embodiment;
• 9 a schematic sectional view of the volume element according to a fifth embodiment;
• 10 a schematic sectional view of the volume element according to a sixth embodiment; and
• 11 a further schematic sectional view of the volume element according to a sixth embodiment, wherein 11 serves to explain a production of the volume element according to the sixth embodiment.

Identical or functionally identical elements are provided with the same reference symbols in the figures.

1 shows a schematic plan view of a volume element that can be filled with a gas, in particular with air, and thereby inflated 10 , which is, for example, as a water sports device, in particular in the form of a surfboard or stand-up paddle board. In 2 is the volume element 10 in a schematic sectional view along a in 1 shown section line AA recognizable. How particularly good 1 and 2 is recognizable, has the volume element 10 at least a first chamber that can be filled with the gas and thereby inflated 12 which at least partially, in particular at least predominantly, by a first wall that is inherently pliable 14th is limited. In addition, the volume element 10 at least one second chamber which can be filled with the gas and thereby inflated 16 on, which is partly through the between the first chamber 12 and the second chamber 16 arranged first wall 14th and partially by a second wall that is inherently slack 18th is limited. For example, when viewed together with 3 it can be seen that the walls 14th and 18th are formed separately from each other. The volume element 10 moreover has at least one third chamber that can be filled with the gas and thereby inflated 20th on which at least partially, in particular at least predominantly, through one between the second chamber 16 and the third chamber 20th arranged, the second chamber 16 partially delimiting and inherently slack third wall 22nd is limited. Especially good when viewed together with 4th it can be seen that the first wall 14th with the second wall 18th in at least one first connection point P1 connected is. The second wall 18th is with the third wall 22nd in at least one second connection point P2 connected. Also are the first wall 14th and the third wall 22nd in at least a third connection point P3 with at least one limp in itself and the first chamber 12 limiting and limp fourth wall 24 of the volume element 10 connected. The walls 14th and 22nd are also in the third connection point P3 with a limp in itself and the chamber 20th partially delimiting fifth wall 26th connected.

To now a complex and for example for a use of the volume element 10 the geometry of the volume element is particularly advantageous as a water sports device 10 realize as well as the volume element 10 To be able to manufacture in a particularly simple and thus time-efficient and cost-effective manner, it is provided that in the unstretched and / or non-inflated state of the volume element 10 the sum of one from the third connection point P3 up to the first connection point P1 continuously extending first length L1 the first wall 14th and one away from the third connection point P3 up to the second connection point P2 continuously extending second length L2 the third wall 22nd one away from the first connection point P1 up to the second connection point P2 continuously extending third length L3 the second wall 18th corresponds. In other words, in the unstretched and / or uninflated state of the volume element 10 : $$\text{L.}1+\text{L.}2=\text{L.}3.$$

Here are the respective lengths L1 , L2 and L3 , at least in the unstretched and / or uninflated state of the volume element 10 , greater than 0.

It is preferably provided that at least in the uninflated state of the volume element 10 the first wall 14th and the third wall 22nd join together along a straight line G, the first connection point P1 and the second connection point P2 are spaced apart from one another along the straight line G. At least in the uninflated and / or unstretched state of the volume element 10 is the third connection point P3 in a perpendicular to the straight line and between the first connection point P1 and the second connection point P2 trending plane, with the third connection point P3 can lie on the straight line G.

4th shows the volume element 10 in its inflated state. In the inflated state of the volume element 10 for example, is the third connection point P3 in a plane perpendicular to the straight line G, the straight line G passing through the connection points P1 and P2 goes. Also is the connection point P3 in the inflated state of the volume element 10 spaced from the straight line G. Especially good 3 it can be seen that the walls 14th , 18th , 22nd and 24 such as 26th are each formed in one piece. For example, the walls 14th and 22nd integrally formed with each other. The wall 18th is for example separate from the wall 14th and / or from the wall 22nd educated. The walls 24 and 26th are for example formed in one piece with one another. The wall 24 and or 26th is separate from the wall 14th and / or from the wall 22nd and / or from the wall 18th educated.

With an in 1 to 4th the illustrated first embodiment are the walls 14th and 22nd by a present one-piece layer 28 of the volume element 10 educated. The location 28 is a surface element, that is to say a web or web material, the surface element per se being limp, that is to say is unstable in shape. The wall 18th is through a second layer 30th formed, which is an inherently slack and thus dimensionally unstable surface element. The locations 28 and 30th are formed separately from one another and connected to one another. In doing so, in 3 dashed lines connection points V or connection areas at or in which the layers 28 and 30th are connected to one another for example by sewing and / or welding and / or gluing. The connection points belong here P1 and P2 to the connection points V. It is also off 3 recognizable that along the entire third length L3 and along the entire length L1 and along the entire length L2 a connection of the second wall 18th with the walls 14th and 22nd is omitted. This can, for example, when the volume element 10 is inflated, the wall 18th from the walls 14th and 22nd take off, there when inflating, the gas, especially air, into the chamber 16 flows in.

The walls 24 and 26th are through a third layer 32 of the volume element 10 formed, including the third layer 32 is a pliable surface element or is formed by such a pliable surface element. The respective surface element is thus formed by a material that is inherently pliable and thus inherently pliable, that is to say unstable in shape. The location 32 is separate from the layers 28 and 30th arranged, the layers 32 , 30th and 28 are formed separately from one another and connected to one another. For example, the walls 14th and 22nd at least in the connection point P3 with the walls 24 and 26th connected are the layers 28 and 32 at least in the connection point P3 connected with each other. The locations 28 and 32 can for example be connected to one another by sewing and / or welding and / or gluing.

It is also off 2 and 3 recognizable that the chambers 12 and 20th tubular or tubular and thus respective tubes, which are in the transverse direction of the volume element 10 are arranged side by side. The transverse direction of the volume element 10 is indicated by a double arrow 34 illustrated. The chambers 12 and 20th and thus the tubes and the volume element 10 overall indicate one by a double arrow 36 illustrated longitudinal extension, which runs perpendicular to the transverse direction. In other words, the double arrow illustrates 36 a longitudinal extension direction of the volume element 10 and thus the tubes, the direction of longitudinal extension being perpendicular to the transverse direction.

The volume element 10 has a fourth layer, for example 38 on, which is formed by a preferably one-piece and pliable surface element. The respective location 28 , 30th , 32 respectively 38 is preferably in one piece and / or by a pliable surface element, that is, by a pliable web or by a pliable web material. The previous and following remarks on the locations 28 and 30th can easily access the locations 32 and 38 are transferred, so that in this regard, for example, the wall 24 the function of the wall 14th and the wall 26th the function of the wall 22nd Has. The locations 28 , 30th , 32 and 38 are arranged one on top of the other. Also, the locations are 32 and 38 in respective, in 3 Connection areas VB illustrated by dashed lines, in particular by gluing and / or sewing and / or welding, connected to one another.

Especially good 1 to 4th it can be seen that the second wall 18th in the inflated state of the volume element 10 has a shape that differs from a flat shape and is curved outward, so that the wall 18th in the inflated state of the volume element 10 from the walls 14th and 22nd is curved away outwards. It is preferably provided that the wall 18th is formed from an airtight material. In other words, it is preferably provided that the wall 18th forming and per se pliable web is formed from a pliable, but airtight material. This preferably also applies to the location 38 . Alternatively or additionally, it is conceivable that the wall 14th and / or the wall 22nd and / or the wall 24 and / or the wall 26th is formed from an air-permeable material. In other words it is conceivable that the location 28 and or 32 is made of a pliable and air-permeable material.

5 shows a second embodiment of the volume element 10 . It is on one of the first walls 14th and the third wall 22nd facing away from the second wall 18th at least one envelope element 40 arranged, which is preferably separate from the walls 14th , 22nd , 18th , 24 and 26th is trained. For example, the enveloping element 40 another location 42 which can be formed, for example, by a material that is inherently pliable, that is to say, for example, by an inherently pliable web. It is conceivable that the enveloping element 40 or the location 42 is formed from a pliable and airtight or air-permeable material. The envelope element 40 forms in the inflated state of the volume element 10 preferably one of the walls 14th , 18th and 22nd turned away and one environment 44 of the volume element 10 facing surface 46 , which in the inflated state of the volume element 10 is preferably at least substantially planar or flat.

The same may apply to the location 38 be transmitted. There is a wrapping element 48 provided, which is another location 50 of the volume element 10 can be. The envelope element 48 is preferably separate from the layers 28 , 30th , 32 , 38 and 42 formed and on one of the walls 24 and 26th facing away from the location 38 arranged. The location 42 is for example in particular by gluing and / or sewing and / or welding with the layer 30th connected. Alternatively or additionally, for example, is the location 50 in particular by gluing and / or sewing and / or welding to the layer 38 connected.

Overall it's over 1 to 5 recognizable that the volume element 10 one Has layer structure in which the layers 28 , 30th , 32 , 38 respectively 28 , 30th , 32 , 38 , 42 and 50 form or are respective layers of the layer structure arranged one on top of the other or one above the other. At least the chambers are there 12 and 20th inflatable tubes, which in the present case are in the longitudinal direction or longitudinal extent of the volume element 10 run away. The respective location 28 , 30th , 32 , 38 is, for example, a semifinished product that is inherently pliable, which can be a woven fabric, knitted fabric, scrim or another, in particular flat, textile. The respective location 28 , 30th , 32 respectively 38 is at least essentially two-dimensional in its original and thus, for example, uninflated and unstretched state, i.e. a surface element.

By being the sum of the lengths L1 and L2 the length L3 corresponds, the or all layers can for example be placed on top of one another at least essentially flat and connected to one another. This allows the volume element 10 can be manufactured particularly simply and thus time-saving and inexpensive. For example, it is conceivable that the layers 28 and 32 when they are laid flat on top of one another, unstretched and uninflated, they are connected to one another, for example sewn together. Then, for example, the layers 28 and 30th respectively 32 and 38 connected to one another in a plane stacked state, in particular glued to one another or welded to one another. All of this takes place with the layers flat or flat on top of one another and can therefore be carried out with the help of appropriate sewing systems, presses, welding systems or the like, so that the volume element 10 can be produced time and cost-effectively. Only when or through the inflation of the volume element 10 or the interconnected layers create a three-dimensional structure of the volume element 10 . The condition preferably applies L1 + L2 = L3 for each part of the volume element 10 . It is advantageous here if the gas or a pressure caused by the gas can spread in all subregions. For this purpose, a single-chamber system is preferably provided which comprises, for example, at least or all between the layers 30th and 38 arranged chambers and thus, for example, the chambers 12 , 16 and 20th are fluidically connected to each other.

6th to 8th show a second, third and fourth embodiment, respectively. How out 6th to 8th can be seen, complex geometries can be particularly simple, such as, for example, one in particular in the transverse direction of the volume element 10 varying thickness of the volume element 10 be created.

9 shows a fifth embodiment in which, for example, the aforementioned single-chamber system is exemplified on the basis of the chambers 12 and 16 is illustrated. The wall, which is preferably formed in one piece per se, has 14th a through opening 52 on over which the chambers 12 and 16 are fluidically connected to each other. The passage opening 52 is thus an air passage between the chambers 12 and 16 so that they are fluidically connected to each other. This can affect the or all other chambers, in particular between the layers 30th and 38 , be transmitted. For example, the layers 28 and 32 with each other and / or with the respective position 30th respectively 38 by sewing and thereby connected, for example, along at least or precisely one seam which is not airtight per se, this seam can function as an air passage and thus as a fluidic connection of the respective chambers. If, for example, the respective location 28 respectively 32 is per se air-permeable and thus not airtight, this results in a fluidic connection of the chambers to one another, and special connection measures for fluidically connecting the chambers can be avoided. Preferably the layers are 30th and 38 airtight, i.e. airtight. It is also advantageous if the layers are connected to one another in an airtight manner at their respective edge regions R. Preferably the layers 28 and 32 in their edge areas R connected to one another airtight. Alternatively or additionally, the layers 30th and 38 in their edge regions R with one another and / or with the layers 28 and 32 airtightly connected or the layers 28 and 30th are mutually airtight in their edge areas R and / or the layers 30th and 38 are in their edge areas R against each other and / or against the layers 28 and 32 sealed airtight. The envelope elements 40 and 48 are for example on the layers forming a four-layer composite 28 , 30th , 32 and 38 applied from the outside and can form a respective smooth or flat surface so that, for example, a person is particularly advantageous on the respective enveloping element 40 respectively 48 , especially on its surface 46 respectively 54 can sit and / or stand advantageously.

To the volume element 10 to inflate and this the gas, especially air, into the chambers 12 , 16 and 20th to initiate is preferably at least or exactly one off 9 recognizable valve 21st intended.

$$\text{S}4+\text{S}6=\text{S}8$$

$$\text{S}5+\text{S7=S}9.$$

Out 10 and 11 a sixth embodiment can be seen, in which between the outer or outermost envelope elements 40 and 48 more than four layers are provided. In other words, it is preferably provided that the envelope elements 40 and 48 the outermost layers or Layers of the volume element 10 are so the surfaces 46 and 54 those in the fully manufactured state of the volume element 10 preferably outermost and thus from one in the area 44 of the volume element 10 stopping person are visually and haptically perceptible. The previous and following explanations about the lengths L3 , L2 and L1 and in particular their relationship to one another can easily be transferred to the sixth embodiment. In 10 the respective, corresponding lengths are named with S1, S2, S3, S4, S5, S8 and S9, whereby the following applies: $$\text{S1 + S}2=\text{S.}3+\text{S.}\mathrm{4th}+\text{S.}5$$

$$\text{S.}\mathrm{4th}+\text{S.}\mathrm{6th}=\text{S.}\mathrm{8th}$$

$$\text{S.}5+\text{S7 = S}9.$$

The structures can be built up with any number of layers or layers according to the same scheme or principle. Also in 11 Dashed lines illustrate respective connection points or connection areas in which the corresponding layers are connected to one another, for example by sewing and / or gluing and / or welding.

Out 4th and 6th it can be seen that between the envelope element 40 and the wall 18th , in particular between the envelope element 40 and the location 30th , at least a space 19th is arranged or several spaces 19th are arranged. The respective space 19th is partly through the wall 18th or the location 30th and partially limited by the envelope element. Preferably is in the space 19th a filling material arranged, which is preferably separate from the envelope element 40 and separate from the wall 18th or the location 30th is formed and is also provided. Thus is the gap 19th at least partially, in particular at least predominantly or completely, filled or filled with the filler material. The filler material is preferably an elastomer, in particular polyurethane or silicone. For example, the filling material is in the space 19th injected. Alternatively or additionally, the filler material is a foam or foam element. In other words, the gap can be at least partially, in particular at least predominantly or completely, foamed with the filler material. The filling material allows a particularly high rigidity and a particularly smooth surface 46 be created.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 2009/0049757 A1 [0002]
• FR 2516887 [0002]
• DE 3109016 A1 [0002]
• DE 8805969 U1 [0002]
• DE 202012005185 U1 [0002]

Claims (15)

Volume element (10), with at least one first chamber (12) that can be filled with a gas and thereby inflated, which is at least partially delimited by a first wall (14) which is inherently pliable, with at least one second chamber that can be filled with the gas and thus inflated ( 16), which is delimited partly by the first wall (14) arranged between the first chamber (12) and the second chamber (16) and partly by a second wall (18) which is inherently pliable, and with at least one which can be filled with the gas and thereby inflatable third chamber (20) which is at least partially delimited by a third wall (22) which is arranged between the second chamber (16) and the third chamber (20), partially delimiting the second chamber (16) and which is inherently slack, in which: - the first wall (14) is connected to the second wall (18) in at least one first connection point (P1), - the second wall (18) is connected to the third wall (22) in at least one second connection point (P2), - the first wall (14) and the third wall (22) in at least one third connection point (P3) with at least one pliable fourth wall (24, 26) that partially delimits the first chamber (12) or the third chamber (20) ) of the volume element (10) are connected, and - In the unstretched and / or uninflated state of the volume element (10), the sum of a first length (L1) of the first wall (14) extending continuously from the third connection point (P3) to the first connection point (P1) and one of the third connection point (P3) up to the second connection point (P2) continuously extending second length (L2) of the third wall (22) of a continuously extending third length (L3) from the first connection point (P1) to the second connection point (P2) ) corresponds to the second wall (18). Volume element (10) according to Claim 1 wherein: - at least when the volume element (10) is not inflated, the first wall (14) and the third wall (22) adjoin one another along a straight line (G), - along the first connection point (P1) and the second connection point (P2) of the straight lines (G) are spaced apart, and - at least in the deflated and / or unstretched state of the volume element (10) the third connection point (P3) in a perpendicular to the straight line (G) and between the first and second connection point (P1, P2 ) running plane, especially on the straight line. Volume element (10) according to Claim 1 or 2 wherein the first chamber (12), the second chamber (16) and the third chamber (20) are fluidically connected to one another. Volume element (10) according to one of the preceding claims, wherein the first wall (14) has at least one passage opening (52) via which the first chamber (12) is fluidically connected to the second chamber (16). Volume element (10) according to one of the preceding claims, wherein the third wall (22) has at least one passage opening via which the second chamber (16) is fluidically connected to the third chamber (22). Volume element (10) according to one of the preceding claims, wherein: - The first wall (14) is formed in one piece and / or - The second wall (18) is formed in one piece and / or - The third wall (22) is formed in one piece. Volume element (10) according to Claim 6 , wherein the first wall (14) is formed in one piece with the third wall (22). Volume element (10) according to Claim 6 or 7th wherein the second wall (18) is formed separately from the first wall (14) and / or separately from the third wall (22). Volume element (10) according to one of the preceding claims, wherein the second wall (18) in the inflated state of the volume element (10) has a shape different from a flat shape, in particular curved shape. Volume element (10) according to one of the preceding claims, wherein the second wall (18) is not connected to the first wall (14) and / or the third wall (22) along the entire third length (L3). Volume element (10) according to one of the preceding claims, wherein the second wall (18) is formed from an airtight material. Volume element (10) according to one of the preceding claims, wherein the first wall (14) and / or the third wall (22) is formed from an air-permeable material. Volume element (10) according to one of the preceding claims, wherein on one of the first and third walls (14, 22) facing away from the second wall (18), in particular separate from the walls (14, 18, 22) formed, enveloping element (40) is arranged. Volume element (10) according to one of the preceding claims, wherein the respective walls (14, 18, 22) are connected to one another by sewing and / or gluing and / or welding. Volume element (10) according to one of the preceding claims, wherein the volume element (10) is designed as a water sports device, in particular as a surfboard, swimming island, air mattress or the like.

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