Ergonomic chair and its manufacturing process.

Description

1 / 9 Descriptive Report of Invention Patent Ergonomic Chair and its Manufacturing Process Field of Invention

[0001] This report covers confidential knowledge, information and / or data usable in industry, commerce or service provision, for which the holder requests: the protection established in item XXIX of Article 5 of the Federal Constitution; the maintenance of the legal status of confidentiality / secrecy; the maintenance of the physical status of confidentiality / secrecy for the time period stipulated in Law 9.279 / 96, the Industrial Property Law; and the rights provided for in Article 195 of Law 9.279 / 96. The present invention is situated in the field of mechanical engineering focused on ergonomic chairs. Background of the Invention

[0002] The tendency for humanity to remain seated for several hours persists, whether due to work or study. Added to this fact, the increasing use of electronic devices for games or social interaction has contributed even more to this trend. Therefore, there is a need for chairs that are more comfortable for users who sit for many uninterrupted hours throughout the week.

[0003] To this end, conventional solutions have been inspired by sports car seats, providing chairs with aesthetic appeal and a high backrest that surrounds the seated user. However, in many cases, premature wear of the upholstery occurs, cracking or peeling, in addition to structural ruptures in the base that supports the seat or deformations in the reclining backrest. Furthermore, solutions from the previous technique have levers under the seat, making adjustments difficult for both backrest recline and seat height.

[0004] In this sense, the aim is to develop more chair solutions Petition 870240108384, dated 12 / 19 / 2024, page 5 / 43 2 / 9 robust and durable, which also promote ergonomics and comfort for the user, in addition to facilitating chair adjustments.

[0005] Thus, as can be inferred from the literature reviewed, no documents were found anticipating or suggesting the teachings of the present invention, so the solution proposed here has novelty and inventive activity compared to the state of the art. Summary of the Invention

[0006] Thus, the present invention solves the problems of the prior art by providing a chair comprising backrest, seat and base assemblies, offering structural robustness to accommodate comfortable upholstery and adjustment mechanisms easily accessible to the user, aiming at chair durability and user ergonomics. In one embodiment, the chair of the invention is an adaptation of a long-distance bus seat.

[0007] In a first object, the present invention presents an ergonomic chair comprising a seat assembly (20) having at least one easily accessible lever for adjusting the chair and associated between a backrest assembly (10) and a base assembly (30), defining ergonomic curves.

[0008] In a second object, the present invention presents a manufacturing process for an ergonomic chair comprising the steps of: constructing a backrest assembly (10), a seat assembly (20) and a base assembly (30); associating the seat assembly (20) between the backrest assembly (10) and the base assembly (30), defining ergonomic curves; and associating a lever to the seat assembly (20), the lever being easily accessible for adjusting the chair.

[0009] These and other objects of the invention will be immediately appreciated by those skilled in the art and will be described in detail below. Brief Description of the Figures Petition 870240108384, dated 12 / 19 / 2024, page 6 / 43 3 / 9

[0010] In order to better define and clarify the content of this patent application, the following figures are presented:

[0011] Figure 1 shows a perspective view of an embodiment of the ergonomic chair of the invention.

[0012] Figure 2 shows another perspective view of the chair in a more reclined position.

[0013] Figure 3 shows a front view of the chair, highlighting the backrest (10), seat (20) and base (30) assemblies.

[0014] Figure 4 shows a side view of the chair in its most reclined position.

[0015] Figure 5 shows another side view of the chair.

[0016] Figure 6 shows a top view of the chair.

[0017] Figure 7 shows a detailed bottom perspective view, highlighting the adjustment mechanism (26) associated with the lever (9) of the base assembly (30).

[0018] Figure 8 shows an exploded view of a chair for implementing the manufacturing process of the invention, with view A indicated.

[0019] Figure 9 shows a perspective view of the chair in the final stage of the manufacturing process, with view B indicated.

[0020] Figure 10 shows a side view of the chair in Figure 9.

[0021] Figure 11 shows a front view of the chair in Figure 9.

[0022] Figure 12 shows another side view of the chair in Figure 9, where the cables (1) are highlighted.

[0023] Figure 13 shows view A being an exploded view of the isolated adjustment mechanism (26).

[0024] Figure 14 shows view B, highlighting the connecting element (32) and the adjustment mechanism (26).

[0025] Figure 15 shows a top perspective view of a realization of the chair's structures, omitting its coverings. Petition 870240108384, dated 12 / 19 / 2024, page 7 / 43 4 / 9

[0026] Figure 16 shows a bottom perspective view of the embodiment of Figure 15.

[0027] Figure 17 shows a view of an embodiment of the first structure of the backrest assembly (10) attached to the second structure of the seat assembly (20).

[0028] Figure 18 shows a view of the second structure of the seat assembly (20), highlighting the interface (29) that receives fastening elements (2).

[0029] Figure 19 shows a view of an embodiment of the chair of the invention, where the ergonomic curves of the chair's upholstery are highlighted.

[0030] Figure 20 shows another view of the chair in Figure 19.

[0031] Figure 21 shows a detailed view of the chair with one of the armrests (21) in the enabled position.

[0032] Figure 22 shows a view of the chair in Figure 19 highlighting the first covering (11) of the backrest assembly (10).

[0033] Figure 23 shows a detailed view of the first coating (11) shown in Figure 22.

[0034] Figure 24 shows another view of the chair in Figure 19 with the other armrest (21) in the enabled position.

[0035] Figure 25 shows another embodiment of the chair structures of the invention.

[0036] Figure 26 shows another view of the embodiment of Figure 25.

[0037] Figure 27 shows a view of an embodiment of the second structure of the seat assembly (20).

[0038] Figure 28 shows a detailed view of the embodiment of Figure 27, highlighting the piston (8) of the seat assembly (20) and the interface (29) positioned on the connecting element (32).

[0039] Figure 29 shows another detailed view of the embodiment of Figure 27, highlighting the adjustment mechanism (26) connected to a cable. Petition 870240108384, dated 12 / 19 / 2024, page 8 / 43 5 / 9 (1) connected to the seat assembly lever (20). Detailed Description of the Invention

[0040] The descriptions that follow are given by way of example and are not limiting to the scope of the invention and will make clearer the subject matter of this patent application.

[0041] In a first object, the present invention provides an ergonomic chair. The chair of the invention has a seat assembly (20) associated between a backrest assembly (10) and a base assembly (30). In one embodiment, the chair is rotatable by means of the base assembly (30) which has a star base with casters.

[0042] The backrest assembly (10) is fixed to the seat assembly (20) connected to the base assembly (30). For this purpose, the backrest (10) and seat (20) assemblies have structures inside them that receive the chair's upholstery, aiming at user comfort. In one embodiment, the chair structures are made of metallic material. In one embodiment, the chair structures are made of polymeric material. In one embodiment, the chair structures are made of a combination of metallic and polymeric materials. With this, the structures together with the chair's upholstery define ergonomic curves. Additionally, the upholstery has a soft finish.

[0043] Based on this, in one embodiment, the chair of the invention is an adaptation of a highway bus seat. From this, the present invention provides greater durability of the chair and greater comfort to the user seated for a long period. Furthermore, flat components make up the chair's structures, aiming to facilitate the packaging and transport of the disassembled chair.

[0044] Thus, the backrest assembly (10) has a first cover (11) fixed onto a first structure. In one embodiment, a headrest (12) with ends fixed onto two supports Petition 870240108384, dated 12 / 19 / 2024, page 9 / 43 6 / 9 sides (13) form the first structure. In one embodiment, the first structure also has a lumbar support (14) between the side supports (13).

[0045] Additionally, the backrest assembly (10) is fixed to the base assembly (20) by means of the side supports (13). For this purpose, the base assembly (20) has a second structure that fixes a second cover (24). In one embodiment, two crossbars (27) are fixed between two side frames (28), forming the second structure in a rectangular configuration. Thus, in one embodiment, the first structure and the first cover of the backrest assembly (10), the second structure and the second cover of the base assembly (20) are derived from a bus seat.

[0046] Furthermore, the second structure has an interface (29) for fixing the seat assembly to the base assembly (30). In one embodiment, the interface (29) is a flat plate provided with holes as a structural optimization. In one embodiment, said plate is enclosed by the reinforcements (28) and supported on the crossbars (27).

[0047] By means of said interface (29), the seat assembly (20) is fixed to the base assembly (30) which has a connecting element (32). In one embodiment, the connecting element (32) is located in the center of the interface (29). Thus, the connecting element (32) supports the backrest (10) and seat (20) assemblies. In one embodiment, the connecting element (32) and the interface (29) are joined in a non-permanent manner, allowing disassembly to facilitate the transport of the chair. In one embodiment, the connecting element (32) is fixed to the interface (29) by screws (2), facilitating the assembly or disassembly of the chair by the user. The use of screws does not restrict the scope of the invention, which may employ nuts, rivets, among other fastening elements (2).

[0048] Thus, in one embodiment, the interface (29) together with the connecting element (32) provide adaptations to the bus seat, generating the chair of the invention which is more robust and comfortable than the ergonomic chair solutions of the prior art. Petition 870240108384, dated 12 / 19 / 2024, page 10 / 43 7 / 9

[0049] In terms of ergonomics, the present invention provides headrests (12), lumbar support (14) and armrests (21), defining the ergonomic curves of the chair. Furthermore, the first cover (11) and the second cover (24) form an extensive surface for greater comfort for the seated user.

[0050] Additionally, the seat assembly (20) has a side support (22) which is a finish covering the reinforcements (28), two side supports (13) at the lower ends and the connection of each armrest (21) with the respective reinforcement (28). In one embodiment, the side support (22) is arranged over the reinforcement (28) by means of a fastener (25) which receives fastening elements (2). In one embodiment, the side support (22) extends along the side of the seat assembly (20), from the connection of the armrest (21) to a cup holder (23).

[0051] In a further embodiment, the armrest (21) has an adjustment between the enabled (forward) and disabled (upward) positions, to suit the user's preferences.

[0052] Furthermore, the side support (22) receives a lever. In one embodiment, each side support (22) receives a lever. Thus, the levers are arranged in an upper region of the seat assembly (20), providing easy user access to the lever for adjusting the chair. From this, the invention provides accessibility, since the user does not need to move sideways or stand up to adjust the recline or height of the chair.

[0053] In one embodiment, each lever has an adjustment function to adjust the seat height or to adjust the backrest tilt. For the purposes of the present invention, the lever does not restrict the scope of the invention, since other actuation means can be used, for example, a button or a display.

[0054] For such chair adjustments, each lever is associated with a piston. In one embodiment, a first lever (6) is associated with a piston (8) of the seat assembly (20), which adjusts an angle between the assembly Petition 870240108384, dated 12 / 19 / 2024, p. 11 / 43 8 / 9 seat (20) and backrest assembly (10).

[0055] In one embodiment, a second lever (7) is associated with a piston (8) of the base assembly (30), which adjusts the seat height. For this purpose, the second lever (7) is connected to an adjustment mechanism (26) by means of a steel cable (1). In one embodiment, the adjustment mechanism (26) pulls the cable (1) as the second lever (7) is activated. In one embodiment, the mechanism (26) is fixed between a lever existing on the star base of the base assembly (30) and said cable (2), said lever actuates the piston (8) of the base assembly (30) for seat height adjustment when the user activates the second lever (7) of the seat assembly (20).

[0056] Thus, the first (6) and second (7) levers arranged on the side supports (22) allow, respectively, the adjustment of the chair's recline and the adjustment of the seat height, without the user needing to bend over to reach the lever under the seat, as is done in the previous technique.

[0057] Furthermore, in one embodiment, the adjustment mechanism (26) has a coupler (3) that receives the piston lever (8) through a hole (5). In this embodiment, at the opposite end of the hole (5) is connected the cable (1) secured by a fastening element (2), for example, screws and nuts (4).

[0058] In a second object, the present invention presents a manufacturing process for an ergonomic chair comprising the steps of: constructing a backrest assembly (10), a seat assembly (20) and a base assembly (30); associating the seat assembly (20) between the backrest assembly (10) and the base assembly (30), defining ergonomic curves; and associating a lever to the seat assembly (20), the lever being easily accessible for adjusting the chair.

[0059] The chair manufactured by the invention process is as defined above and shown in figures 1 to 29.

[0060] Furthermore, the chair of the invention complies with current regulations, such as the regulatory standard NR-17. Petition 870240108384, dated 12 / 19 / 2024, p. 12 / 43 9 / 9

[0061] The inventive concept now revealed and exemplified in one or more ways has been treated as a trade secret and was not previously disclosed until the filing of this patent application. This trade secret is an intangible asset of the applicant. Any future publication of the patent application does not, in itself, constitute authorization for use by third parties, serving only as: (i) notification to third parties of the existence of said trade secret on the filing date; (ii) unequivocal indication of its holder; and (iii) encouragement to develop new improvements based on the concept now revealed, to avoid reinvestment in the development of the same asset already held by the applicant. It is hereby warned that any commercial use requires authorization from the holder and that unauthorized use will result in sanctions provided for by law.In this context, it is clarified from the outset that, based on the disclosure of the present inventive concept, those skilled in the art may consider other ways of carrying out the invention that are not identical to those merely exemplified above, but that, in the event of an intention to use it commercially, such ways may be considered as being within the scope of the appended claims. Petition 870240108384, dated 12 / 19 / 2024, page 13 / 43

Claims

1 / 2 Claims 1. Ergonomic chair characterized by comprising a seat assembly (20) having at least one easily accessible lever for adjusting the chair and associated between a backrest assembly (10) and a base assembly (30), defining ergonomic curves.

2. Chair, according to claim 1, characterized by the levers being arranged in an upper region of the seat assembly (20) for height adjustment and / or for recline adjustment.

3. Chair, according to claim 1 or 2, characterized in that the backrest assembly (10) comprises a first covering (11) associated with a first structure comprising a headrest (12) disposed on at least one side support (13) connected to a lumbar support (14).

4. Chair, according to any one of claims 1 to 3, characterized in that the seat assembly (20) comprises a second cover (24) associated with a second structure comprising at least: a. an armrest (21); b. a side support (22) being connected to the armrest (21) and to the side support (13) of the backrest assembly (10); and c. an interface (29) for fixing to the base assembly (30).

5. Chair, according to any one of claims 1 to 4, characterized in that the seat assembly (20) comprises at least one crossbar (27) connected to a side frame (28), enclosing the interface (29).

6. Chair, according to any one of claims 1 to 5, characterized by the base assembly (30) comprising a connecting element (32) with the interface (29) of the seat assembly (20).

7. Chair, according to any one of claims 1 to 6, characterized in that the connecting element (32) and the interface (29) are joined in a non-permanent manner. Petition 870240108384, dated 12 / 19 / 2024, page 14 / 43 2 / 2 8. Chair, according to any one of claims 1 to 7, characterized by comprising an adjustment mechanism (26) associated between the lever of the seat assembly (20) and a piston (8) of the base assembly (30).

9. A chair, according to any one of claims 1 to 8, characterized by being an adaptation of a bus seat.

10. Manufacturing process for an ergonomic chair characterized by comprising the steps of: a. construction of a backrest assembly (10), a seat assembly (20) and a base assembly (30); b. association of the seat assembly (20) between the backrest assembly (10) and the base assembly (30), defining ergonomic curves; and c. association of a lever to the seat assembly (20), the lever being easily accessible for adjusting the chair.

11. Process, according to claim 10, characterized by the chair being as defined in any of claims 1 to 9. Petition 870240108384, dated 12 / 19 / 2024, page 15 / 43

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