Modular chair
The modular chair design addresses the challenge of constraining modern fabrics by using a frame with protrusions and sliders, ensuring uniform constraint and comfort, thereby preventing fabric release and extending the chair's lifespan.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- DV8 ID SRL
- Filing Date
- 2021-08-12
- Publication Date
- 2026-06-30
Smart Images
Figure 0007881883000001 
Figure 0007881883000002 
Figure 0007881883000003
Abstract
Description
Technical Field
[0001] The present invention relates to a modular chair of the type specified in the preamble of claim 1 and a method for manufacturing such modular chair.
[0002] In particular, the present invention relates to any device that enables a user to sit, and depending on the configuration, it can be a modular chair, an armchair, a sofa, or other things for various types of other uses including office use, home use, garden use, luxury goods use, or uses in the medical field such as automobiles, airplanes, wheelchairs, etc., and the field of children's chairs, or relates to linkages in the broadest sense of the term.
Background Art
[0003] As is known, in the current state of the art, depending on the target market for which the chair is intended, many different types of chairs are produced, such as chairs with armrests, recliners, those with slings, or armchairs or sofas.
[0004] Historically, chairs or seats are derived from the simplest benches. The latter actually has a simple support surface that defines the seat so as to be structurally restricted with respect to at least two struts designed to enable the seat to be lifted above the floor.
[0005] Currently, chairs are usually adapted to enable at least one, preferably one user to be supported on a surface called the seat. Most chairs also have additional support elements such as a backrest and may include armrests and supports for the upper and lower limbs respectively.
[0006] Among the various and most common types of chairs in use, it is possible to identify the so-called deck chair, which consists of a folding chaise longue whose backrest can be reclined to a variable angle, allowing the user to sit or lie down as desired; the cure-rule seat, which has a substantially cross or X-shaped structure and can be folded in some cases for seat support, and has also been developed as a folding stool; the tripolina, which is entirely folding and has historically been used on the battlefield; the one-piece chair, which is generally made of polymer material and is used in outdoor environments, mainly in the catering sector; the rocking chair, which has two curved supports designed to allow the rocking motion typical of the chair in question; and the very commonly used cantilever chair or cantilever, which has only two vertical members that are bent at floor level and seat level and connected horizontally by a continuous tube.
[0007] In addition to the examples mentioned above, there are numerous other different types and structures of chairs designed to meet aesthetic needs, such as market demand for specific shapes, or technical needs arising from the need to optimize the production process while maintaining a high level of quality for chair products.
[0008] In particular, some examples of chairs consist substantially of a frame used to give support and shape to the overall structure of the chair, and at least one membrane, usually made of fabric, which can be bonded to the frame to produce a seat and possibly a backrest.
[0009] Examples of chairs incorporating such configuration systems are described in Patent Documents US2830350A, US2830350A, and US3752209A.
[0010] Reference US2830350A describes a connecting mechanism between a frame and fabric that provides the use of a sheath defining an open profile, which can be placed on the frame to lock it in place thanks to a flap that fits into a slot, so as to substantially capture one end of the fabric within a hook-shaped portion.
[0011] Since the sheath is a simple tubular element with a shape that opposes the entire frame, reference US2830350A essentially presents the same principle as described above, but in an even simpler way.
[0012] Finally, US3752209A describes an evolved version of the sheath from previous literature, in which serrated elements are implemented at the ends of the profile to increase the sheath's grip on the frame and fabric.
[0013] The publicly known technologies described have several significant drawbacks.
[0014] In particular, given that advancements in support membranes, especially the use of fabrics whose mechanical behavior is locally and in a predetermined manner, have made it possible to produce higher-performing seats and backrests, simple and rapid constraint mechanisms, such as those described in the aforementioned patent documents, effectively neutralize or reduce the performance of the new generation of fabrics, depending on their internal morphology.
[0015] In reality, it is difficult to effectively and uniformly constrain the fabric along the frame, and furthermore, during normal use, known sheaths experience fabric release in several places where they are particularly stressed by tensile stress, thereby impairing the overall functionality of the chair.
[0016] In this context, chairs can be uncomfortable and may even cause users to adopt incorrect postures that impair their balance.
[0017] In conclusion, the abrasion effect of the sheath supporting the fabric under tensile stress can lead to actual chair failure, requiring component replacement, and in the worst case, even damage to the fabric that remains only partially trapped in the sheath.
[0018] In this context, the fundamental technical problem underlying the present invention is to devise a modular chair capable of substantially eliminating at least some of the aforementioned drawbacks, and a method for manufacturing the said modular chair.
[0019] Within the scope of the technical challenges described above, a key objective of the present invention is to obtain a modular chair and related manufacturing methods that enable the production of most new-generation fabrics having variable local behavior in a high-performance manner without reducing or thus hindering the effects of such fabrics.
[0020] Another important object of the present invention is to realize a modular chair and related manufacturing method that enables the constraint of a membrane determined by the fabric in a homogeneous manner with respect to the frame, so as not to alter the behavior of the membrane, especially when specifically designed for use on a frame.
[0021] A further task of the present invention is to provide a chair that maintains a comfortable state over time and facilitates the user in adopting the correct posture.
[0022] In conclusion, the objective of the present invention is to provide a chair that has an extremely long lifespan, that is, is less affected by the effects of wear, reduces the need for replacement, and at the same time enables high simplicity and cost-effectiveness in manufacturing.
[0023] The technical problems and specified objectives are achieved by a modular chair and associated manufacturing method as asserted in appended claim 1.
[0024] Preferred technical solutions are highlighted in the dependent claims. [Brief explanation of the drawing]
[0025] The features and advantages of the present invention will be made clear below by a detailed description of preferred embodiments of the invention with reference to the accompanying drawings. [Figure 1]An example of a modular chair according to the present invention, realized using a complex three-dimensional frame, is shown. [Figure 2] A partial cross-sectional view of the chair of FIG. 1 is shown. [Figure 3] An example of a connection mechanism of a modular chair according to an invention in a first configuration, where the frame includes teeth and the cursor is a rod including holes having a shape that opposes the teeth. [Figure 4a] The slider of the mechanism of FIG. 3 is shown. [Figure 4b] The frame of the mechanism of FIG. 3 is shown. [Figure 5a] Another example of a connection mechanism of a modular chair according to the present invention in a first configuration, where the frame includes a T-shaped rail and the cursor is a tubular element having a shape that opposes the rail. [Figure 5b] A further example of a connection mechanism of a modular chair according to the present invention in a first configuration, where the frame includes an O-shaped rail and the slider is a tubular element having a shape that opposes the rail. [Figure 6] A slider similar to the slider of FIG. 5a is shown, with notches shown, and in particular, there are wider notches at the bottom to further enable folding of the slider up to an angle equal to or greater than 90°. [Figure 7] An example of a component of a connection mechanism of a modular chair according to the present invention in a second configuration, where the slider is a tubular element integrated with a membrane. [Figure 8] A top view of a connection mechanism of a modular chair according to the present invention, including a frame including a rail and a slider, and a membrane of FIG. 7, is shown. [Figure 9a] An example of a connection mechanism of a modular chair according to the present invention, where the frame includes two rows of O-shaped rails and two separate sliders each including a tubular element having a contour shape with respect to the rail. [Figure 9b] A modification of the example of FIG. 9a, where the protrusion is configured to be engaged by a single slider including two receiving portions. [Figure 10]An example of an embodiment of the modular chair according to the present invention, which is a special support means, is shown. [Figure 11] Details of the support means, particularly the tensioner coupling mechanism, of the modular chair according to the present invention are shown. [Figure 12] This is a schematic perspective view of a preferred example of a chair frame according to the present invention. [Figure 13a] This shows the details of the mechanism of the frame hinge of the modular chair according to the present invention in an inactive configuration or before assembly. [Figure 13b] Details of the mechanism realized by the hinge of the chair frame according to the invention, in terms of its use or assembly configuration, are shown. [Figure 14] Details of the hinge for the modular chair according to the present invention are shown. [Figure 15] This is a front view of a modular chair according to the present invention, including a support structure, particularly a bottom portion that covers the membrane of the support means. [Figure 16] This is a front view of a modular chair according to the present invention, which includes a connecting device at the bottom of the frame and, in an office embodiment, a support means. [Figure 17] The image shows a front view of a modular chair according to an alternative embodiment of the invention, with a membrane suspended from it. [Modes for carrying out the invention]
[0026] In this document, when measurements, values, shapes, and geometric references (e.g., perpendicularity and parallelism) are associated with words such as “approximately” or other similar terms such as “roughly” or “substantially,” measurement errors or inaccuracies due to production and / or manufacturing tolerances should be considered to exclude, in particular, slight deviations from the value, measurement, shape, or geometric reference to which they are associated. For example, when these terms are associated with a value, they preferably indicate a deviation of 10% or less of the value.
[0027] Furthermore, when used, terms such as "first," "second," "higher," "lower," "principal," and "secondary" do not necessarily specify priority in order, relationship, or relative position, but can simply be used to clearly distinguish their different components.
[0028] Unless otherwise specified, in the following discussion, terms such as “processing,” “calculation,” “determining,” “calculating,” or similar terms refer to the operations and / or processes of a computer or similar electronic computing device that manipulate and / or transform data, which is represented as physical quantities such as the amount of electrons in the registers and / or memory of a computer system, into other data, which is similarly represented as physical quantities in the computer system, registers, or other storage, transmission, or information display devices.
[0029] Unless otherwise indicated, the measurements and data reported in this text should be considered to have been performed in accordance with the International Standard Atmosphere (ICAO) (ISO 2533:1975).
[0030] Referring to the figure, the modular chair according to the present invention is generally represented by the number 1.
[0031] The modular chair 1 is preferably a chair, but may be any device that allows a user to sit and therefore may consist of devices other than chairs, such as armchairs or sofas, depending on the configuration.
[0032] For example, chair 1 may also be a seat for a vehicle, or for other means such as a train or aircraft.
[0033] Furthermore, chair 1 is not limited to a specific use or design, and may be adapted to various types of uses, such as home use, office use, or other environments not mentioned, depending on its convenience.
[0034] For example, chair 1 may be a chair incorporating joints, such as a chair for general tasks. Alternatively, as already mentioned, chair 1 may be used for industrial applications, particularly on machinery and aircraft, and for medical applications, particularly as a wheelchair, or even in the field of children's chairs.
[0035] In particular, the modular chair 1 preferably comprises at least one support structure 10.
[0036] The support structure 10 is preferably adapted to enable support for the chair 1, and in particular to support a user sitting on the chair 1.
[0037] Therefore, the components of chair 1, which are adapted to accommodate various parts, substantially enable the correct operation of chair 1.
[0038] Therefore, the support structure 10 may include the support means 5.
[0039] The support means 5 may be, for example, legs or handles configured to support a resting area on which a user sits. Alternatively, the support means 5 may be configured in a specific manner as described below.
[0040] In either case, the support structure 10 preferably includes a frame 2.
[0041] Frame 2 is essentially a component of the support structure adapted to connect via an interface to a support on which the user sits directly.
[0042] Therefore, frame 2 may be made up of one or more elements. These elements may be connected to create a continuous structure, or they may be fragmented and discontinuous.
[0043] Among various configurations, frame 2 is preferred, though not necessarily so, to define a closed structure during use, or in other words, when assembled.
[0044] Preferably, the frame 2 extends along the extended track 2a, either entirely or in part.
[0045] The extended track is the direction along which frame 2 or a component of frame 2 extends. Therefore, the extended track 2a may be straight or curved.
[0046] If frame 2 defines a closed structure, for example, some kind of frame, the curved extension path 2a allows frame 2 to close itself and capture the holes, as occurs in all rings.
[0047] Naturally, frame 2 may also include additional components such as armrests or supports that are substantially removable and extend outside the extension path 2a.
[0048] Therefore, frame 2 may be of a traditional or conventional type, or it does not necessarily have to have a structure formed by planar parts.
[0049] Preferably, frame 2 may be determined to have a structure in which its path is a complex curved shape that extends into space in a three-dimensional manner.
[0050] This type of complex structure may be, for example, a composite 3D curve, or a curve that is formed by an extended trajectory 2a that rotates around at least two principal axes in three-dimensional space.
[0051] Therefore, the frame 2 may be made of, for example, an extruded polymer material, or other material that allows for the production of a hollow, continuous profile having non-coplanar extended trajectories 2a.
[0052] Alternatively, frame 2 may be made of a composite structure that includes a metal core coated with a different material, such as a polymer material, by a technique such as polymer injection molding of a metal core, or even a metal core without a metal core.
[0053] However, non-coplanarity remains a desirable, though not necessary, element for the purpose of creating chair 1, particularly in terms of the comfort it provides.
[0054] The frame 2 may be further constrained and supported by other components such as support means 5, including legs or joints that support the frame 2 with respect to the ground.
[0055] Therefore, the frame 2 includes at least the protruding portion 20.
[0056] The projection 20 is substantially a part of the frame 2 that is distinguished from the rest of the frame 2 and defines a function that will be better specified thereafter.
[0057] The above-mentioned protrusion 20 preferably protrudes in the incident direction with respect to the expanded trajectory 2a.
[0058] More specifically, the protrusion 20 extends perpendicularly to the extended track 2a.
[0059] Therefore, the protruding portion 20 can realize multiple different configurations.
[0060] In the first embodiment, for example, the projection 20 includes at least one tooth 200. Thus, the tooth 200 extends perpendicularly with respect to the expanded raceway 2a.
[0061] Naturally, preferably, the frame 2 includes a plurality of protrusions 20, if defined by teeth 200. Thus, such protrusions 20 are discontinuously distributed along the deployment path 2a on the frame 2.
[0062] In an alternative embodiment, the projection 20 includes the rail 201.
[0063] The rail 201 preferably extends continuously parallel to the extended track 2a.
[0064] Therefore, the rail 201 may be constructed in a further different manner.
[0065] For example, a section region having a substantially T-shape can be realized along a plane perpendicular to the extended orbital 2a.
[0066] Alternatively, the rail 201 may define a section region that is substantially circular or O-shaped.
[0067] Furthermore, frame 2 may include, for example, a plurality of protrusions 20 arranged in parallel columns and extending parallel to the extension path 2a.
[0068] Naturally, the projection 20 may include a row of teeth 200 or rails 201, as shown in Figures 9a to 9b, for example.
[0069] As expected, frame 2 is intended to support the support portion that comes into direct contact with the user.
[0070] This support is made, in particular, by film 3.
[0071] Therefore, chair 1 also includes membrane 3.
[0072] Therefore, the membrane 3 is configured to be substantially constrained, either as a whole or in part, with respect to the entire frame 2 or a portion thereof.
[0073] The film 3 is generally a deformable sheet that can be made from virtually any material.
[0074] Preferably, the membrane 3 is made of a fabric which may be defined exclusively by a sheet of fibers, or it may include, for example, a pad element trapped between two sheets of fabric to define a sandwich structure.
[0075] In either case, preferably, the film 3 defines the mounting surface 30 and the edge portion 31.
[0076] The mounting surface 30 is preferably adapted to support the user during use. Therefore, it is preferable that it defines a support for the user themselves and is capable of supporting the user's weight.
[0077] On the other hand, the edge portion 31 is substantially defined by the peripheral zone of the support surface 30. In other words, the edge portion 31 is substantially defined by at least a portion of the contour region of the support surface 30.
[0078] During use, preferably, the frame 2 can support the membrane 3 corresponding to at least a portion of the edge 31, possibly by tension.
[0079] The membrane 3 may, in fact, be connected in its entirety to the frame 2 along its edge 31, or it may be connected only partially along its edge 31, as an example in cases where it is intended to define a chair 1 that includes a portion of the membrane 3 suspended in vacuum.
[0080] This last detail may also be preferable if the chair 1 is made of a different membrane. In fact, the chair 1 may include a membrane 3 that forms a resting area, partially constrained at the edge 31 by the frame 2 and partially constrained by other rigid or deformable elements.
[0081] In particular, frame 2 preferably locally tenses the film 3 with respect to the shape of frame 2 itself. Therefore, in this sense, it is important that the film 3 follows the extended trajectory 2a, at least corresponding to the edge 31.
[0082] Furthermore, if the membrane 3 includes fabric, it may include composite fibers, or rather, polymer filaments in which some fabric filaments are twisted around it. This type of fiber makes it possible to reinforce the fabric, or more generally, to modify the local mechanical properties of the membrane 3 itself as desired. Local properties mean that the bearing surface 30 may be considered as a set of smaller surfaces that define each of its own mechanical properties, and therefore may be variable from surface to surface.
[0083] In essence, especially in the case of fabrics, the form of membrane 3 can be achieved by studies and procedures such as finite element theory, or other types of methods that allow for the discretization of the surface and control of the local mechanical properties of individual elements.
[0084] The membrane 3 may be made using an automatic knitting machine, specifically a machine known as a flat knitting machine.
[0085] Using these machines, it is possible to control the mechanical properties of individual elements of the support surface 30 so that the membrane 3 can obtain the desired features through the structural elements that interact with it in the chair 1, as already mentioned.
[0086] Membrane 3 can also be made using a conventional loom.
[0087] In this case, for example, the fabric of the membrane 3 may exhibit different mechanical properties within the support surface 30 depending on, for example, the titration or the weft threads used within the fabric.
[0088] Furthermore, the membrane 3 may include localized support elements, whether made by computerized technology or conventional textile technology. For example, the membrane 3 may include captured or woven internal pockets, readily available in the membrane 3, within its own metallic structures such as bars or filaments, to locally increase the rigidity of the support surface 30. In this sense, the fabric of the membrane 3 may appear as a woven support surface 30 including ribs or diaphragms, which are, for example, made of metal suitable for reinforcing the structure of the fabric itself, or of metal or unstructured filaments that are heated on command to locally alter the thermal properties of the membrane 3.
[0089] In a preferred embodiment, the membrane 3 is made by combining two different intertwining methods. Preferably, this is actually achieved by combining knitting techniques with weaving techniques.
[0090] In detail, the membrane 3 has a periodic pattern at its base, which includes at least one main filament 33.
[0091] The main filaments are preferably woven in a mesh-like manner.
[0092] Furthermore, the mounting surface 30 includes one or more parts having controlled behavior 30a.
[0093] The portion having controlled behavior 30a preferably includes a periodic weave pattern determined by the main filament 33, and further includes at least one secondary filament 34 inserted therein.
[0094] The secondary filament 34 is preferably positioned on the weft along a predetermined trajectory so as to vary the mechanical behavior of the mounting surface 30 in a control manner.
[0095] The mechanical behavior of the support surface 30 is substantially varied in a portion 30a having controlled behavior, which is the region of the support surface 30 in which the secondary filaments 34 are woven and included, thereby varying the type or number of secondary filaments 34.
[0096] Therefore, the membrane 3 substantially includes a hybrid fabric comprising a mesh structure in which secondary filaments 34 in a suitable portion 30a having controlled behavior are inserted into the weft, preferably using weaving techniques combined with knitting techniques.
[0097] These secondary filaments 34 are preferably inserted into the mesh so as to be woven between at least two adjacent rows of main filaments 33 along a predetermined trajectory. As is known, the periodic pattern that makes up the mesh may, in fact, be substantially defined by continuous rows that are intertwined with each other, including, but preferably, at least one main filament 33 having different properties and characteristics from the secondary filaments 34.
[0098] However, the insertion of the secondary filaments 34 may be carried out by means of principles other than weaving. For example, the main filaments 33 may be made to form a double layer. In this situation, the secondary filaments 34 may be intertwined in an alternative way with the two layers of the weave, for example, or the secondary weft filaments 34 may not be woven into the mesh but simply inserted between the layers if the mesh has two front and back layers. This type of configuration can facilitate the insertion of cushions or even airbags between the layers of the membrane 3.
[0099] Therefore, substantially, the membrane 3 generally includes at least one main filament 33 that defines a knitted fabric in which at least one secondary filament 34, arranged in the weft or rather along a predetermined trajectory, is inserted inside, according to a different embodiment.
[0100] From a microscopic perspective, adjacent rows of the main filaments 33 of the mesh define loops substantially aligned in one direction, called stoppers. The latter preferably define predetermined trajectories for secondary filaments 34f. Preferably, the secondary weft filaments 34 are positioned adjacent to the loops and pass between the fabric defined by the main filaments 33 and the stoppers.
[0101] More specifically, the secondary filaments 34 may preferably intertwine with two adjacent rows of the main filaments 33, so that adjacent rows of the main filaments 33 define the mesh of the fabric through which the secondary filaments 34 pass.
[0102] In particular, the secondary filaments 34 are therefore preferably intertwined with the main filaments 33 so as to pass through the front and back of the mesh in each loop or every two loops. Generally, the secondary filaments 34 are preferably woven so as to be along the rows of the main filaments 33, but they may also be intertwined so as to be along the other directions of the main filaments 33.
[0103] Of course, as already mentioned, the secondary filaments 34 arranged in the weft make it possible to vary the local mechanical behavior of each individual part 30a, which has a controlled behavior by varying the type or even the number of secondary filaments 34. Therefore, the fabric may contain multiple secondary filaments 34, for example, along the same row direction, or alternatively, along a direction perpendicular to the row direction.
[0104] Essentially, this configuration of the membrane 3 fabric makes it possible to create a membrane 3 that exhibits non-uniform behavior along the entire surface of the support portion 30, for example, by simply checking the type or number of woven secondary filaments 34, thereby creating areas that are stiffer, for example, intended for the user's seat, or areas that are less stiff, for example, intended for the user's back.
[0105] From a practical standpoint, a process may be provided to obtain weft insertion in a knitted mesh, which involves weaving the main filament 33 around the secondary filament 34, or rather, corresponding to the front and back sides, respectively, while continuously alternating the positions of the front and back needles. In this way, the main filament 33 forms a mesh that is substantially wrapped around the secondary filament 34 so as to block it.
[0106] More specifically, the secondary filaments 34 may be inserted by a thread guide into the mesh fabric defined by the main filaments 33, and even simultaneously with the processing of the needle. Thus, a thread guide, which is known to those skilled in the art, may position the secondary filaments 34 within the fabric while the fabric is being formed.
[0107] As has been widely described, the yarn guide may also be configured to position multiple secondary filaments 34 within the fabric.
[0108] As already mentioned, the secondary filaments 34 may also be substantially woven between the two layers of the mesh. Thus, each secondary filament 34 may be incorporated between two layers that define a fabric whose base is defined by the main filaments 33. Furthermore, the secondary filaments 33 may be woven alternately between two layers, for example, or inserted between two layers that define a substantially sandwich structure. In fact, the mesh fabric of the main filaments 33 may define multiple tubular portions into which one or more secondary filaments 34 are inserted.
[0109] Preferably, the secondary filament 34 defines different mechanical characteristics from the main filament 33. For example, the secondary filament 34 may be more or less rigid than the main filament 33 so as to increase the elasticity or local stiffness of the film 3 in accordance with the portion 30a having controlled behavior.
[0110] In this sense, it is important to note that the film 3, in particular the entire bearing surface 30, may contain a plurality of distinct portions 30a having controlled behavior. Therefore, each of the controlled-behavior portions 30a may be distinct from one another and may also contain a different number of secondary filaments 34 and / or simply different types of secondary filaments 34. Thus, the film 3 may contain a variety of different secondary filaments 34 internally.
[0111] Furthermore, the secondary filament 34 may also define variable and variable and different thermal or electrical properties with respect to the main filament 33. In this sense, for example, the secondary filament 34 may have similar mechanical properties to the main filament 33, but may be a different filament that is more reactive to heat rather than to the passage of electric current. For example, the secondary filament 34 may include a piezoelectric material that can change shape after an electric current has passed through it, or a material that allows the secondary filament 34 to expand or contract in proportion to the application or cessation of heat supply.
[0112] Therefore, in the function of the heat received by the film 3, the film 3 may include, or consist of, at least one secondary filament 34 of the thermo-shrink or heat-shrink type, so as to enable variation of the local voltage of portion 30a having controlled behavior.
[0113] Alternatively, as previously predicted, the secondary filament 34 may include a material that can be thermally controlled, for example, to allow the local temperature of the controlled behavior portion 30a to vary according to instructions.
[0114] The secondary filament 34 may also include at least a heat-shrinkable component and an elastic component to enable shrinkage controlled by both the heat-shrinkable and elastic components.
[0115] In either case, preferably, the secondary filaments 34 and the main filaments 33 are integrally constrained to each other at the edge 31 of the film 3. Integral constrainment means that the secondary filaments 34 and the main filaments 33 slide against each other in the entangled or overlapping regions defined in the portion 30a having controlled behavior, while at the edge 31 they are connected together so as not to be unstable relative to each other. This constraint can be achieved by sewing, gluing, or heat-welding the filaments 33 and 34 at fixed points located at the edge 31, or by other means, for example, the methods described below.
[0116] This final feature makes it virtually possible to increase the efficiency of the weft work in the mesh. Furthermore, the effect is further enhanced by the configuration described below.
[0117] The membrane 3 also includes, in fact, the guide 32.
[0118] The guide 32 is preferably a tubular element positioned corresponding to the edge 31. This guide 32 may be an external element welded or sewn to the edge 31 of the membrane 3, or it may be made of the membrane 3.
[0119] Therefore, the guide 32 may be defined by the winding of the film 3 corresponding to the film 3.
[0120] Furthermore, in a preferred embodiment of the film 3, the linkage of secondary filaments 34, whose bases are woven into one or more layers of a mesh defined by a periodic pattern defined by the main filaments 33, mainly occurs in the guide 32.
[0121] In detail, the secondary filament 34 defines at least one winding within the guide 32 so as to form a row or row 3a.
[0122] Row 3a is substantially defined by the winding closure and includes fixed points along which the filaments 33 and 34 are bound together.
[0123] Therefore, column 3a extends parallel to the guide 32, defining a row in which the main filament 33 and secondary filament 34 are locked together and become one with each other.
[0124] More specifically, the secondary filament 34 is inserted into the membrane 3 so as to make at least one nearly complete spiral within the guide 32.
[0125] In particular, the secondary filament 34 may be completely or partially wound around the guide 32, thereby substantially defining a weft yarn given a double secondary filament 34, for example, by the entry of the secondary filament 34 into the guide 32 and the subsequent exit of the guide 32.
[0126] The winding of the secondary filament 34 has a very important effect of locking the main filament 33 and the secondary filament 34 together in a row 3a parallel to the guide 32.
[0127] The arrangement of the secondary filaments 34 in the weft may also follow multiple paths.
[0128] For example, the secondary filament 34 may be placed within a fabric having a base that is knitted following a continuous path.
[0129] The path can be achieved by positioning the secondary filament 34 to wind itself by a complete turn within the guide 32, then proceed within the knitted fabric defined by the main filament 33, and wind again within the second guide 32, or within another part of the same guide 32 located on the opposite side with respect to the previous side of the guide 32. To pass through the lower or upper column or row, the secondary filament 34 proceeds parallel to the guide 32, then winds again with the main filament 33 and is woven again until it reaches the starting guide 32. Naturally, this process can also provide the introduction of a second secondary filament 34, or even a third or more secondary filaments 34, along some rows.
[0130] More specifically, the secondary filament 34 is woven into the fabric in the guide 32 to create a "hooked in English" or "false English rib" that typically occurs between the filament and the knitting needle.
[0131] Furthermore, the secondary filament 34 may be pulled alongside the guide 32 and passed from one stop to the other, or it may be inserted into the guide 32 itself.
[0132] Generally, preferably, the secondary filaments 34 are fixed and constrained in the guide 32 to the fabric made by the main filaments 33; otherwise, the secondary filaments 34 slide freely within the fabric in areas of the membrane 3 that are different from the edge 31 or rather the guide 32.
[0133] Guide 32 has another important function in either case.
[0134] Guide 32 is actually configured to accommodate at least one slider 4.
[0135] Therefore, chair 1 also includes at least one slider 4. The mechanism for mounting chair 1 may, in particular, consist exclusively of one or more sliders 4, membranes 3, and a frame 2. In this sense, it is preferable, though not necessarily, that the mechanism does not require additional components to realize constraints between parts.
[0136] As shown in Figure 9a, if there are several sliders 4, they may be constrained to the same frame 2 on parallel columns.
[0137] The slider 4 is preferably an elongated element that can be inserted into a portion of the membrane 3 at its edge 31, thanks in part to the guide 32.
[0138] For example, slider 4 may also be a slide bar, or a rod slider, or any other sliding element available in guide 32.
[0139] Therefore, slider 4 defines the extension direction 4a.
[0140] The extension direction 4a is the direction along which the cursor primarily extends. In particular, this extension direction 4a is preferably at least partially parallel with respect to the extended trajectory 2a.
[0141] In fact, slider 4 is configured to interact with frame 2.
[0142] As already mentioned, the slider 4 is preferably housed within the guide 32.
[0143] Therefore, the slider 4 can be extended along the entire edge 31 or along a portion thereof.
[0144] Furthermore, the slider 4 may be made continuously along the edge 31 of the film 3, or the film 3 may provide a plurality of continuous sliders 4 contained within the film 3.
[0145] Preferably, in the embodiments shown in Figures 1-2, the frame 2 is substantially a frame for the membrane 3, which can support the membrane fabric, for example, by interlocking with the protrusion 20 of the slider 4 in the guide 32, as will be better specified hereafter.
[0146] The slider 4 actually includes at least a receiving portion 40.
[0147] The receiving portion 40 may be part of the slider 4, or it may be determined by the shape of the slider 4 itself.
[0148] Generally, the receiving portion 40 is configured to accommodate the protruding portion 20 at least partially.
[0149] In this way, the frame 2, membrane 3, and slider 4 are fixed and constrained at at least one fixed point.
[0150] This constraint is possible because, as the slider 4 is inserted into the guide 32, at least a portion of the membrane 3 is blocked or trapped between the slider 4 and the frame 2, and these are further blocked by the receiving portion 40 and the protruding portion 20.
[0151] Chair 1 may also include multiple cursors 4 that are constrained to the same projection 20, or, for example, to each projection 20 extending along parallel columns.
[0152] Alternatively, the same slider 4 may include two or more receiving portions 40, each configured to accommodate a projection 20 or more projections 20, for example, if defined by teeth 200.
[0153] Therefore, the slider 4 may be rigid. In this case, preferably, the slider 4 has an extension direction 4a that is parallel to and can overlap with the extension track 2a, so as to enable efficient connection.
[0154] Preferably, the slider 4 is deformable so that it can rotate in the extension direction 4a around any axis and can be made parallel to the extension track 2a as instructed.
[0155] Preferably, the slider 4 includes a plurality of notches 41 to support deformation of the slider 4 and variation in the extension direction 4a.
[0156] The notch 41 is preferably a through hole or a non-through hole located on the extended surface of the slider 4.
[0157] Preferably, the notch 41 is periphery and extends along a plane perpendicular to the extension direction 4a.
[0158] In this way, the notch 41 supports the preferably elastic deformation of at least a portion of the slider 4 and at least a portion of the curved portion in the extension direction 4a. More specifically, the notch 41 allows at least a portion of the slider 4 to be easily flexed.
[0159] Preferably, the notch 41 extends along at least 20% of the peripheral section locally defined by the profile defined by the section along the plane perpendicular to the extension direction 4a. Of course, the notch 41 may also extend along more than 20%, and even up to 90%, of the peripheral section locally defined by the profile defined by the section along the plane perpendicular to the extension direction 4a. Increasing the extension of the notch 41 generally proportionally increases the possibility of describing the curved portion of the slider 4. Examples of larger or smaller notches 41 are shown in Figure 6.
[0160] The notches 41 may also be made alternately along the slider 4 so as to be alternately distributed on two opposite sides of the slider 4 parallel to the extension direction 4a. This configuration is shown in particular in Figure 5.
[0161] The notches 41 may also define different shapes. For example, they may define substantially straight shapes, and thus define straight holes along a plane perpendicular to the extension direction 4a.
[0162] Alternatively, each of the notches 41 may define an isosceles triangle shape, and the vertices of the isosceles triangles further increase the deformability.
[0163] Slider 4 may have different shapes defined depending on the configuration of frame 2.
[0164] For example, if the projection 20 is teeth 200, the slider 4 may also consist of a simple rod, which may be inserted inside the guide 32. Preferably, in this case, the slider 4 may include at least one hole 42.
[0165] The hole 42 substantially forms the receiving portion 40. Therefore, it may be a through hole or a non-through hole.
[0166] The holes 42 are generally, preferably, configured to accommodate the teeth 200 and at least a portion of the membrane 3. Essentially, since the membrane 3 is fitted onto the slider 4, the holes 42 are intended to contain a portion of the membrane 3 that is pressed by the teeth 200 within the holes 42, or also partially penetrated by the teeth 200 themselves. Preferably, where penetration is foreseen, the secondary filaments 34 are sufficiently resistant to damage during penetration, which is actually carried out by penetrating the mesh, for example, by separating two adjacent main filaments 33 using the teeth 200.
[0167] In this way, the membrane 3 is firmly fixed with respect to the slider 4 and the frame 2 at at least one fixing point determined in this case by the teeth 200.
[0168] On the other hand, if the projection 20 is a rail 201, the slider 4 may consist of or include a tubular element. The tubular element is substantially configured to be inserted into the guide 32, similar to the rod described above.
[0169] Preferably, the tubular element is an open tubular element that extends along the direction of extension 4a and thus defines the profile 43. The profile 43 is preferably a C-shaped profile defined along a plane perpendicular to the extension direction 4a.
[0170] Profile 43, therefore, forms the receiving portion 40. In fact, profile 43 is configured to capture at least a portion of the rail 201 and the membrane 3.
[0171] In this case as well, as in the previous example, the membrane 3 sandwiched between the rail 201 and the receiving portion is substantially captured, or rather blocked, at multiple fixing points extending along the longitudinal direction 4a.
[0172] More specifically, preferably, the protrusion 20 and the tubular element have opposing shapes.
[0173] In any case, the slider 4 may be retractable with respect to the guide 32, may be constrained by the guide 32 when inserted, or may be integrated inside the guide.
[0174] In particular, the slider 4 may be slidably constrained within the guide 32 so that it can be pulled out from the membrane 3 along the extension direction 4a.
[0175] Alternatively, the slider 4 may be integrated with the membrane 3 and constrained within the guide 32 so as to be locked along the extension direction 4a with respect to the membrane 3.
[0176] This lock may be made using a mechanical device, for example, an extension that is activated when the slider 4 is inside the guide 32. Alternatively, they may simply be made from the outside of the slider 4.
[0177] In this sense, for example, the outer surface may have a roughness such that it is difficult for the slider 4 to slide within the film 3, particularly within the guide 32.
[0178] The slider may also include reinforcing elements, such as a metal cable positioned at the end of the profile 43 and extending along the extension direction 4a. Alternatively, a diaphragm may be provided to tighten the grip of the profile 43 on the protrusion and strengthen the connection by sliding or clipping the slider 4 on the frame 2 to capture the membrane 3.
[0179] In either case, thanks to the connecting mechanism determined by the frame 2, membrane 3, and slider 4, the chair 1 defines at least one seat. Furthermore, the chair 1 preferably also defines a backrest.
[0180] Therefore, the seat portion is defined by at least a part of the support surface 30 and is generally the portion that is subjected to greater tension than, for example, the backrest.
[0181] Preferably, the film 3, constrained to the frame 2 through a slider 4 included in the guide 32, can exhibit its technical characteristics through a control mechanism.
[0182] Essentially, the membrane 3 is constrained to the frame 2 in such a way as to be constrained rather than conforming, at least at one fixed point corresponding to at least the edge 31. This feature is important because the connection between the frame 2 and the membrane 3 thus realized allows for the prevention of the membrane 3 moving on the frame 2 by delocalizing the portion 30a having controlled behavior and negating the mechanical effect provided by the membrane 3.
[0183] Preferably, the controlled-behavior portions 30a are positioned at predetermined locations on the backrest and seat. Particularly preferably, the membrane 3 forming the backrest includes several controlled-behavior portions 30a, each having different deformability, to allow for greater freedom and flexibility at the bottom and greater rigidity at the top.
[0184] In particular, for example, a first controlled-behavior portion 30a is positioned corresponding to the user's lumbar region where it is placed during the session, a second controlled-behavior portion 30a is preferably positioned above the user's thoracic spine during the session, and a third controlled-behavior portion 30a is positioned between the first and second controlled-behavior portions 30a.
[0185] Particularly preferably, the first portion 30a having controlled behavior and the second portion 30a having controlled behavior include a second highly elastic filament 34 so that the portion 30a having controlled behavior is more deformable.
[0186] The third portion 30a having controlled behavior preferably includes at least one second rigid filament 34 such that this portion 30a having controlled behavior is more rigid and less deformable than at least two other portions 30a having controlled behavior.
[0187] In this way, when the user places themselves in the chair, the frame 2 is not necessarily shaped in this manner, and the membrane 3 conforms to the user's waist and the chest area on the back. In fact, the load is applied to the membrane 3, and the shape of the support surface 30, by the portion 30a having controlled behavior, defines the shape that the chair 1 can take, for example, corresponding to the backrest.
[0188] The same argument can be made for seats. For example, a more flexible longitudinal partition may be provided to the seat, thus defining a portion 30a having controlled behavior, and a more rigid central support region including a plurality of secondary filaments 34 arranged along the shoulders, which are similar to, or even more rigid than, the third portion 30a having controlled behavior of, for example, the backrest, for example, or stiffer, for example, a stiffer filament 34.
[0189] The coupling system determined by the slider 4, frame 2, and membrane 3, which have just been described, is particularly effective in the example of chair 1 described below.
[0190] In a non-exclusive but preferred embodiment, the frame 2 defines a composite 3D curve or curve made along an extended trajectory 2a that rotates around at least two principal axes in three-dimensional space.
[0191] Preferably, frame 2 defines a working state or an assembled configuration that produces a closed structure, and a resting state or pre-assembly configuration in which it takes on a different shape.
[0192] In use or in the assembled configuration, preferably, the frame 2 is adapted to support the membrane 3 by tension, corresponding to at least a portion of the edge 31.
[0193] As already mentioned, the membrane 3 may be connected in its entirety to the frame 2 along its edge 31, or, for example, only partially along its edge 31 if the intention is to define a chair 1 that includes a portion of the suspended membrane 3, as shown in Figure 17.
[0194] This last approach may also be appropriate if the intention is to construct chair 1 using three different membranes. In fact, chair 1 may include a membrane 3 that is partially constrained by the frame 2 in its peripheral portion and partially constrained by the other membranes 3 to form a support portion 30.
[0195] In particular, frame 2 locally pulls on membrane 3 in relation to the shape that frame 2 itself takes.
[0196] On the other hand, in the dormant state or pre-assembly configuration, frame 2 releases membrane 3.
[0197] To obtain this result, the frame 2 preferably comprises at least two parts 22, although this is not necessarily required.
[0198] Component 22 is a part of frame 2 that can substantially coincide with a closed structure defined by frame 2. Preferably, they are separated from each other and constrained to each other in a manner that they fit together at two fixing points. Alternatively, they may be parts of a single component that define loose points between components 22, enabling identification of individual components 22. In the latter case, the fixing points correspond to the loose points. Preferably, these fixing points correspond to the endpoints of component 22, but other points, such as midpoints, may be provided to give an annular shape with irregular edges.
[0199] Preferably, the parts 22 are constrained to each other in a fitting manner by two hinges 23.
[0200] The hinge 23 is preferably a suitable means for enabling the switching of the use (assembled) or rest (pre-assembled) state or configuration of the part 22 or frame 2.
[0201] These hinges 23 are preferably mechanical.
[0202] In particular, preferably, the hinge 23 defines a configuration for use or assembly in which the parts 22 actually form the frame 2, and a configuration for rest or pre-assembly in which the parts 22 are folded together like books.
[0203] In this way, when part 22 or frame 2 is in a resting or pre-assembly configuration, the total dimensions of frame 2 are reduced.
[0204] The hinges 23 preferably each define a pivot axis 1a. Preferably, the pivot axis 1a is located along a sagittal plane that divides the closed structure into two substantially identical parts. In use, the sagittal plane conveniently includes the longitudinal direction.
[0205] The axis of rotation 1a preferably defines only the degrees of freedom given to the part 22 of the frame 2. Thus, substantially, the part 22 is preferably adapted to rotate exclusively around the axis of rotation 1a of the hinge 23.
[0206] Conveniently, the pivot axes 1a of the two hinges 23 are aligned with each other. Thus, the frame 2 can be substantially closed in a resting or pre-assembly configuration, as occurs in a typical book, and can be opened again to identify at least one use or assembly configuration that corresponds to a stable equilibrium configuration that places the membrane 3 under tension.
[0207] In particular, frame 2 preferably places membrane 3 under tension only when component 22 is in use.
[0208] To achieve a configuration for use or assembly, or for stable equilibrium, the chair 1 in this embodiment is preferably configured to allow reciprocating rotation of the component 22 exclusively in one direction. In particular, the reciprocating rotation that is enabled is preferably away from the ground, so that the frame 2 can counteract the possible gravity of the user's body placed on the support defined by the membrane 3.
[0209] Rotating in the opposite direction to the ground means that when frame 2 is opened like a book, it faces the ground like a book, allowing its pages to face the ground when opened.
[0210] In this sense, preferably, the chair 1 provides a specific configuration of the hinge 23 in the first embodiment.
[0211] More specifically, as can be seen in Figures 12-14, each of the hinges 23 includes an interference portion 23a.
[0212] Preferably, the interfering portions 23a interfere with each other only when the components 22 form the frame 2 in the usage configuration. Furthermore, they are oriented such that when the user is resting on the film 3 constrained by the frame 2, the interfering portions 23a realize a mutual interference force proportional to the user's gravity.
[0213] In other words, the interfering portion 23a may be a shoulder portion that can collide when the frame 2 is in use and the component 22 is in a stable equilibrium position, and the interfering force may be a constraint that interacts between the interfering portions 23a facing each other.
[0214] Conveniently, part 22 achieves a highly accurate and stable equilibrium position thanks to the interfering portion 23a.
[0215] In more complex configurations, the hinge 23 may not be a mechanical hinge, such as a door hinge found in a house, and may be a hinge 23 suitable for allowing the elastic deformation of part 22 to be flexible.
[0216] In this sense, part 22 may also be a single closed part, as already mentioned, and may be foldable at specific fixed points of flexibility. Examples of such applications exist, for example, in bearingless systems where the permissible displacement of the hinge may be referenced to the deformation of the material rather than the mechanical connection of the structure.
[0217] Furthermore, the hinges 23 may also provide suitable locking means for locking the parts 22 together to ensure that they remain under tension on the membrane 3 during use or assembly.
[0218] Alternatively, the hinge 23 may include an elastic element, such as a spring adapted to hold the part 22 in use or in an assembled configuration when not under stress. In the latter case, the locking means may be configured to lock the part 22 and therefore the frame 2 in a resting or pre-assembled configuration.
[0219] Alternatively, the interfering portion 23a itself may be equipped with a locking mechanism. For example, the latter may include a pressure-locking elastic mechanism adapted to block rotation around the hinge 23 as soon as the interfering portion 23a makes contact. Furthermore, this mechanism may allow the component 22 to be released and the hinge 23 to be released when pressure is applied again. An example of this type may be a spring-loaded locking mechanism.
[0220] As described above, the film 3 is preferably constrained to the frame 2 by the slider 4 and the projection 20, corresponding to at least a portion of its edge 31.
[0221] Therefore, the parts 22 may be different, or they may be identical to each other and have specular reflection with respect to the axis of rotation 1a.
[0222] To optimize the production of part 22, the latter embodiment is particularly preferred. The latter is, in fact, preferably made of aluminum by three-dimensional extrusion. Of course, part 22 may also be made of, for example, a polymer material that is also extruded, or other material that allows for the production of a hollow, continuous profile having non-coplanar unfolding trajectories. In another type of embodiment, part 22, and therefore frame 2, can be made of a composite structure including a metal core coated with different materials, such as a polymer material, by techniques such as polymer injection molding into a metal core.
[0223] The support structure 10 includes the support means 5 in addition to the frame 2.
[0224] The support means 5 is preferably adapted to support the suspended frame 2 and is stably spaced above the ground. For example, a typical support means 5 included in a general chair consists of four or fewer support legs.
[0225] In this embodiment, the support means 5 is preferably a tubular structure that can be connected to the frame 2. More generally, the support means 5 includes a hooking means 50.
[0226] The hooking means 50 is preferably capable of restricting the frame 2 and the support means 5 in a removable and stable manner.
[0227] These hooking means 50 are preferably interlocking constraints that can connect the frame 2 and the support means 5 at predetermined fixed locations in order to realize the support structure 10 of the chair 1.
[0228] More specifically, frame 2 includes pin 21.
[0229] The pin 21 preferably protrudes toward the ground. Essentially, the pin 21 is a cylindrical element that protrudes from the frame 2 to interact with other external components, for example.
[0230] Therefore, these pins 21 are preferably simultaneously constrained to the frame 2 by known constraints such as riveting, bolting, or other types of joints. Alternatively, the pins 21 can be obtained directly on the frame 2.
[0231] Therefore, the pin 21 may be made of metal, or preferably a polymer material. For example, the pin 21 can be made using injection molding technology.
[0232] Therefore, the hooking means 50 is preferably configured to interact with the pin 21. Particularly preferably, the hooking means 50 includes a slot 51 structurally configured to accommodate the pin 21 in order to stably lock the frame 2 onto the support means 5. Particularly preferably, the chair 1 is configured such that the weight of the frame 2, the membrane 3, and the slider 4, and optionally the weight of a person or user placed on it, is pulled to maintain the frame 2 and support means 5, which are constrained and stably locked together.
[0233] As stated, the support means 5 does not necessarily define the structure described above, but in this embodiment, it may also include conventional types of configurations, such as cantilever, four-legged, or other types of configurations, as long as it includes a suitable hooking means 50 for enabling connection between the frame 2 and the support means 5. In an alternative configuration of the chair 1, for example, as shown in Figures 9a-9b, the component 22 may include two protrusions 22. In this case, for example, the chair 1 may be configured to capture two different membranes 3, one of which may be adapted to form a support surface 30 and / or a portion 30a having controlled behavior, and the other may be adapted to cover the bottom of the chair, as explicitly shown in Figure 15.
[0234] The support means 5 may include a connecting device, and in some cases a typical task chair of the other indirect type.
[0235] For example, the connecting device may be a body that can be used to support the frame 2 at the bottom of the frame 2 with respect to the ground, as shown in Figure 16, concealing part of the bottom of the chair and enabling the frame 2 to any component of the support means 5. In fact, the connecting device may have its own rigidity, assuming it is made of, for example, a metal or polymer structure, in order to enable the frame 2 to be connected to a hooking means 5, such as the wheel support of a typical office chair.
[0236] Therefore, the connecting device may have a shape that opposes the lower part of the frame 2, and in particular, it may have an edge shape that opposes the protrusion 20, and may have a shape that opposes the final shape taken by the surface of the film 3 constrained to the frame 2 through the slider 4. Naturally, the connecting device may include a mounting mechanism known in the current state of the art. This type of mechanism is known, for example, by the term synchro-tilt.
[0237] In this embodiment, the chair 1 preferably includes a tensioner 6.
[0238] The tensioner 6 is part of the support means 5 and may be integrated with them, or it may be an external element.
[0239] Preferably, the tensioner 6 is configured to stretch the mounting surface 30 along predetermined fixing points such that the membrane 3 defines at least two or more specific zones. Preferably, when stretched, the membrane 3 defines at least a backrest and a seat.
[0240] The tensioner 6 preferably includes a tubular element 60.
[0241] Therefore, the tubular element 60 can be hollow or even solid. Preferably, it is U-shaped or C-shaped, and it is possible to apply tension along its extension to the support surface 30 and / or a portion 30a having controlled behavior.
[0242] Therefore, the membrane 3 may be positioned between the tensioner 6 and the ground such that the tensioner 6 extends the membrane 3 directly toward the ground itself.
[0243] Preferably, the membrane 3 includes a pocket 35.
[0244] The pocket 35 is preferably configured to accommodate at least a portion of the tubular element 60. In this way, when the tubular element 60 is subjected to displacement, it moves a portion of the membrane 3 together.
[0245] Furthermore, depending on the shape of the pocket 35, the membrane 3 is subjected to stress exclusively along the attachment point of the tubular element 60 to the pocket 35, or, if the pocket 35 completely covers the tubular element 60, the membrane 3 is subjected to stress along the entire length of the tubular element 60.
[0246] In this configuration, preferably, the tubular element 60 is positioned below the membrane 3 with respect to the ground and inside the pocket 35 obtained on the fabric itself, as shown in Figure 10.
[0247] Furthermore, the support means 5 may include a second pin 52.
[0248] The second pin 52 is preferably of the same type as pin 21 and performs substantially the same function.
[0249] In fact, the second pin 52 is preferably housed inside the tubular element 60, and therefore the latter is configured to accommodate them.
[0250] Furthermore, the support means 5 includes the constraint means 53.
[0251] The constraint means 53 is preferably configured to lock the tubular element 60 toward the ground in a predetermined position so that the tensioner 6 applies continuous tension to the membrane 3.
[0252] Conveniently, the restraining means 53 is, in substance, an interlocking means capable of capturing at least a portion of the tensioner 6 so that it can maintain a stable position in a predetermined location by exerting its action in a continuous manner, as described above.
[0253] In detail, the tensioner 6 may also define a curved portion or a recess relative to the ground. The latter, in practice, allows the tensioner 6 to exert force according to the locking direction of the constraint means 53 once the user is on the membrane 3, thereby facilitating the connection between the constraint means 53 and maximizing their stability.
[0254] The realization of the seat and backrest is primarily achieved thanks to the tensioner 6 in this embodiment. However, the configuration of the frame 2 and the membrane 3 also significantly contributes to the technical aspects of the support structure 10, for example, thanks to the shape of the frame 2 and the different stiffness that the membrane 3 can take thanks to the firm and stable connection made thanks to the slider 4 or multiple sliders 4.
[0255] The operation of the modular chair 1, previously described in structural terms, is substantially determined by the method of implementation.
[0256] In fact, the present invention includes a new method of implementation.
[0257] The method includes at least one phase in which the support structure is prepared. As described, the support structure includes frame 2.
[0258] Furthermore, the method includes a phase of procuring membrane 3.
[0259] The method also includes the step of inserting the slider 4 into the guide 32.
[0260] This insertion phase of the slider 4 may be performed during the production of the membrane 3. For example, the membrane 3 may be woven directly onto the slider 4 so as to incorporate it into the fabric of the membrane 3. Furthermore, a guide 32 may be made around the slider 4 in this manner, and it may include secondary filaments 34 that are wound directly around the slider 4.
[0261] Alternatively, preferably, the membrane 3 may be made independently, and the slider 4 may then be inserted into the guide 32, for example, during the assembly of the chair 1.
[0262] Advantageously, the method includes a further hooking phase in which the receiving portion 40 is hooked onto the protruding portion 20.
[0263] In this way, the frame 2, membrane 3, and slider 4 are integrally constrained to correspond to at least one fixing point. As already mentioned, if the projection 20 includes teeth 200, the teeth 200 fit into the hole 42 and push a portion of the membrane 3 into the hole 42.
[0264] If the protruding portion 20 is a rail 201, the receiving portion 40 wraps around at least a part of the rail 201 and captures it.
[0265] The hooking may be performed in particular by sliding the protruding portion 20 of the receiving portion 40, and also by the clipping, or rather the interlocking, of the protruding portion in the receiving portion 40.
[0266] Therefore, the method may include further phases. If the slider 4 is constrained within the guide 32, the method may include a constraint phase between the insertion phase and the hooking phase.
[0267] In the constraint phase, preferably, the slider 4 and the guide 32 are constrained to each other so as to lock the slider 4 and the guide 32 along the extension direction 4a.
[0268] The modular chair 1 and related manufacturing method according to the present invention achieve significant advantages.
[0269] In fact, chair 1 and the associated manufacturing method make it possible to create most new-generation fabrics with variable local behavior in a high-performance manner and, therefore, without reducing or neutralizing the effects of such fabrics.
[0270] In fact, the parts with controlled behavior can function correctly because the secondary filaments 34 that determine their behavior are blocked at the edge 31 of the film 3 by a mechanism defined by the slider 4, frame 2, and guide 32.
[0271] Basically, the configuration of the frame 2, membrane 3, and slider 4 significantly contributes to the technical aspects of the seat and / or backrest, for example, thanks to the shape of the frame 2 or, independently of it, the different stiffness that the membrane 3 can take.
[0272] As described, the film manufacturing technique by mechanical knitting allows for localized control of the density and morphology of the main filaments 33. The presence of secondary filaments 34 locked between the slider 4 and the frame greatly enhances the mechanical control of the surface support portion 30, particularly in portion 30a, where controlled behavior is desired.
[0273] Furthermore, the shape of the frame 2 can, and preferably, allow the membrane 3 to be subjected to different tensions along the edge 31.
[0274] In particular, the frame 2 can preferably take the shape of an approximately three-dimensional figure eight, with a wider portion reserved for the seat compared to the portion reserved for the backrest.
[0275] In this way, a priori, the film 3 is stretched further in the region reserved for the sheet. Therefore, it is possible to synergistically combine the technical possibilities provided by the film 3, frame 2, and slider 4 to enable the definition of a controlled support surface 30 in each sector.
[0276] Conveniently, for example, the seat is firmer than the backrest and therefore less prone to deformation.
[0277] A further advantage of the chair 1 and the associated manufacturing method is that it allows the membrane 3 to be constrained by the fabric in a homogeneous manner with respect to the frame 2, so as not to alter the behavior of the membrane 3, especially when they are specifically designed for use on a frame 2.
[0278] In fact, any coupling mechanism known to those skilled in the art involves releasing a portion of the fabric, which can lead to a decrease in performance or even localized damage to the fabric itself.
[0279] Therefore, chair 1 always maintains a comfortable state over time, facilitating the user to adopt the correct posture.
[0280] The adoption of the connecting mechanism, including the slider 4, frame 2, and membrane 3, as described above, particularly in embodiments of the chair 1 previously described in exemplary forms and shown as examples in Figures 10-17, enables the chair 1 itself to be made into a circular product, thereby supporting the recycling and dismantling of the chair 1.
[0281] In conclusion, chair 1 has an extremely long lifespan, meaning it is less susceptible to the effects of wear and tear, reducing the need for replacement, and simultaneously enabling high simplicity and cost-effectiveness in manufacturing.
[0282] In the present invention, modifications that fall within the scope of the concept of the invention as defined by the claims are possible.
[0283] In this context, all details can be replaced by uniform elements, and the material, shape, and dimensions can be arbitrary.
Claims
1. It is a modular chair, - A support structure including a frame that extends at least partially along the extended track, - A membrane including a support surface designed to support the user, an edge designed to be at least partially attached to the frame, and a tubular guide positioned on the edge, - A slider extending in an extension direction at least partially parallel to the extension track and housed within at least a portion of the tubular guide. Equipped with, - The frame is a portion of the frame and includes at least one projection that protrudes from the extended track, A chair comprising the slider including the frame, the membrane, and at least one receiving portion configured to accommodate at least a portion of the protrusion so as to securely attach the slider to at least one fixing location.
2. The chair according to claim 1, wherein the slider has a structure that allows it to be deformed so that the extension direction can be made parallel to the extension track.
3. The chair according to claim 1 or 2, wherein the slider has a plurality of peripheral notches extending along a plane perpendicular to the extension direction, such that the slider can bend at least a portion of the slider with respect to the extension direction, thereby allowing deformation of at least a portion of the slider and curvature of at least a portion of the extension direction.
4. The chair according to any one of claims 1 to 3, wherein the projection includes at least one tooth extending perpendicularly to the expansion track, and the slider includes at least one hole configured to accommodate at least a portion of the tooth and the membrane as the receiving portion.
5. The chair according to any one of claims 1 to 4, wherein the projection includes a bar that extends continuously parallel to the extension track, and the slider includes an open tubular element as the receiving portion, which extends along the extension direction and defines a C-shaped profile along a plane perpendicular to the extension direction, and is configured to capture at least a portion of the bar of the membrane.
6. The chair according to claim 5, wherein the protruding portion and the open tubular element are shaped to be able to engage with each other.
7. The chair according to any one of claims 1 to 6, wherein the slider is slidably coupled within the tubular guide so that it can be pulled out along the extension direction.
8. The chair according to any one of claims 1 to 6, wherein the slider is integrated with the membrane and is mounted in the tubular guide such that it is locked relative to the membrane along the extension direction.
9. The chair according to any one of claims 1 to 8, wherein the membrane includes a periodic pattern formed by at least one main filament woven in a mesh-like manner, and the support surface has one or more portions in which at least one secondary filament is inserted into the periodic pattern, the secondary filament being arranged as a weft.
10. The tubular guide winds in a direction along the weft thread, The chair according to claim 9, wherein the secondary filament winds itself in the closed portion of the winding and intertwines with the main filament so as to pass before and after the main filament, thereby locking and joining the main filament and the secondary filament together.
11. The chair according to claim 9 or 10, wherein the secondary filaments are woven in the tubular guide within the periodic pattern such that they form an "English knit" or "false English rib".
12. The chair according to any one of claims 9 to 11, wherein the secondary filament includes at least one heat-shrinkable component such that the local tension of one or more portions can vary in response to the heat received by the film.