MXPA97001855A - Improvements to articulated recliner backing with lum support - Google Patents

Abstract

An articulated reclining backrest is described with lumbar support formed essentially by a backrest cut in two sections and wherein one of them is movable including lumbar support, and the other section is fixed to provide stability to the backrest as a whole, both sections being joined by a mechanism of pivotal movement in which two springs of polymeric material of high resistance to torsion are integrated, to provide movement of the backrest, achieving that it returns to its original position when the weight of the user's body is not applied on the same.

Description

"IMPROVEMENTS TO ARTICULATED RECLINING BACKREST WITH LUMBAR SUPPORT" TECHNICAL FIELD OF THE INVENTION The invention relates to seats and backrests for chairs or armchairs for general use and, in particular, seats and armchairs for use in the automotive industry.

BACKGROUND OF THE INVENTION A constant concern in the branch of chairs and armchairs of general use, is to obtain designs of backs and seats that -provide the possibility of reaching a reclining position, which at the same time offers a support to the lumbar region of the users, for the purposes of achieving a comfortable and safe position for the body of the same and avoid vices of position and the probable consequences of a trauma to your spine, in case of an accident. The automotive sector has been characterized in the field of reclining chairs with lumbar support, for the production of novel ergonomic designs, related to the comfort and safety needs of car users. These designs include mechanisms that combine several ergonomic factors such as: a) the position of the chair in relation to the steering wheel or the instrument panel of the vehicle; b) the changing position that the elements of the chair, seat and backrest can hold, to provide the reclining position, and c) the design of the shapes of the feel, based on linings, filling material and solid support elements, to comfortably seat the body and backrest shapes to provide lumbar support to the user's spine. The simultaneous consideration of these ergonomic design factors has produced mechanisms from simple to sophisticated in order to synchronize them and obtain the best possible results. Thus, most of the existing mechanisms are based on the following basic general principles: a) positioning levers that trigger chicotes or cables that release or lock the sliding of the entire chair on rails -parallels, regulating the horizontal position of the chair, while b) the same principle applies to the release or permanence of the vertical position of the backrests of the armchairs to allow entry or exit of passengers to the rear of the vehicle; while: c) the reclining position, in the corresponding upright, vertical position of the backrest, is regulated by means of po- sitioning levers which, being activated or immobilized, allow a variety of reclining positions to the body of the backrest which pivots on - two parallel fixed positions in which it rests on the sides of the structure of the seat or is achieved by means of a screwdriving mechanism that gradually adjusts the recline position of the backrest that moves on two parallel supports placed at the sides of the seat. All the above mechanisms suffer from faults that make them relatively functional, since very often leverage and chicote systems get stuck or break and the backrest is free and deformed, causing the possibility that the spine-vertebral column The user does not have adequate lumbar support that provides stability and safety in case of any event to which the vehicle is subjected in case of improper handling. For all the above, the inventor of this application investigated several alternatives of which one was considered as the most attractive from the ergonomic, technical and economic points of view, consisting of a new reclining backrest with lumbar support that eliminates the disadvantages of the anterior art, formed essentially by a back-cut in two sections and where one of them is movable including lumbar support and the other section is fixed to provide stability to the backrest as a whole, both sections being joined -by a mechanism of pivotal movement in which are integrated two resor ts of polymeric material of high torsion resistance, to provide movement of the backrest, causing it to return to its original position when the weight of the user's body is not applied thereto. The reclining backrest with lumbar support of the present invention has the following advantages over those existing in the market: a) it is manufactured at lower cost, since the mechanism is manufactured with pieces of steel die-cut and two springs of elastic material. high torsional strength co; b) the mechanism is activated immediately upon recharging -in the; c) When the mechanism is activated, two benefits are simultaneously provided: recline and lumbar support; d) they are more productive and require less maintenance; e) because of its small number of pieces it is very easy. of manufacture and assembly and, therefore, the number of failures of -functioning and maintenance measures are reduced. Taking into account the disadvantages of the prior art, the inventor of this application carried out a series of studies, tests and experiments that led him to provide a reclining backrest with lumbar support, novel, which clearly is of utmost importance in the part of the engineering in which the invention is included.

OBJECTIVE OF THE INVENTION It is a main object of the present invention to provide a reclining backrest with lumbar support, capable of creating stability, safety and comfort conditions for the spine and body in general of the user.

BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the invention, it is described based on a preferred embodiment illustrated in the attached drawings and in which: Figure 1 is a front view of the two sections forming the counter-back and corresponding to the two sections which form the reclining backrest with lumbar support of the present invention, to which they are attached; Figure 2 is a side view of the two sections forming the backrest and corresponding to the two sections that form the reclining backrest with lumbar support of the present invention; Figure 3 is a side view of the assembly of the high section of the reclining backrest with lumbar support of the present invention; Figure 4 is a front view of the assembly of the high sec- tion of the reclining backrest with lumbar support of the present in- vention; Figure 5 is a side view of the assembly of the low section of the reclining backrest with lumbar support of the present invention; FIGS. 5A1 and 5A2 show the shapes of the front stop that holds the high and lumbar support sections of the reclining backrest of the present invention in position; Figures 5B1 and 5B2 show the shapes of the rear stopper which holds in position the high and lumbar support sections of the reclining backrest of the present invention; Figure 6 is a front view of the assembly of the low section of the reclining backrest with lumbar support of the present invention; Figure 7 is a top view of the patella mechanism support of the reclining backrest with lumbar support of the present invention; Figure 8 is a side view of the support of the ball joint mechanism of the reclining backrest with lumbar support of the present invention; Figure 9 is an isometric view of the full-length reclining backrest mechanism with lumbar support of the present invention.

PREFERRED MODALITY OF THE INVENTION With reference to Figure 1, the reclining backrest with lumbar support of the present invention is composed of a first high-plane section (A) (not shown) and a second flat section (B) -low (not shown), articulated by a ball joint mechanism (not shown) positioned in the space (C) between both sections (A) and (B) (not shown). Both sections (A) and (B) (not shown) are reinforced by a backstop sectioned in two parts (AA) and (BB) formed in pairs of resistant material that correspond to and are joined to them and which are the ones that are show in the figure. Now referring to Figure 2, the sections (AA) and (BB) of the counter-back that joins the reclining backrest (not shown) with lumbar support of the present invention are integrated by a first section. (A) high and a second section (B) low (not shown), and articulated by a diagram mechanism (not shown) positioned in the space (C) between both sections (A) and (B) (not shown). - tradas) that present a slightly curved profile laterally. Referring to Figure 3, the high section (A) of the resilient, reclining head with lumbar support of the present invention is provided with a pair of lateral rounded profiles (S) pivoting on a pair of corresponding lateral supports (R) (not shown) U-shaped provided in the upper part of the section (B) low (not shown) of the backrest when the body of the user (not shown) is redirected on it. The high section (A) is articulated to the lumbar support (L) by means of screws and nuts (TR1 to TR5) (not shown) and both sections (A) and (L) make a force torque on the resor ts (Q). ) (not shown) positioned between sections (A) high and - (B) low, when reclining the user's body (not shown) on the upper section (A) of the backrest. In turn, the lumbar support section (L) is attached at its lower part to the lower section (B) of the reclining backrest, by means of a curved edge (Ll) that fits with another upper (B7) border (not -shown) of the low section (B), provided with an inclined slope or recess corresponding to the edge (Ll). Referring now to Figure 4, the high section (A) of the lumbar support reclining backrest of the present invention is hinged to the lumbar support section (L) by means of five or more sets of screws and nuts (TR1 a TR5) that hold in position to the -support (SP) (not shown) at whose ends they are coupled -the ball joints (not shown); while it is provided -in its lower part with a pair of empty rectangular sections (RT) where a pair of springs (Q) (not shown) of high resistance are positioned, which allow the pivoting of the upper section (A) -of the backrest on the lower section (B) (not shown), by means of the semicircular rounded profiles (S) provided on both sides -of the lower part of the section (A). The lummar support section (L) is coupled downwardly with the lower section (B) (not shown) of the reclining backrest and is coupled upwards with the support (M) (not shown) of the spring (Q). ) (not-shown) »giving high reliability and flexibility to the high (A) and (B) low sections of the backrest within ergondic limits. Referring now to Figure 5, the lower section (B) of the reclining backrest of the present invention is provided on its upper part, with a pair of semicircular rounded sections (R), half-round, U-shaped, in each end thereof, on which the (S) sections (not shown) pivotally slide corresponding to the section (A) (not shown) high of the backrest, when the user's body is reclined (not -shown). The pivoting movement of the upper part (A) of the backrest is supported by a pair of springs (Q) (not shown) that make a force torque when the body (not shown) of the user reclines on the section (A) high. The lower section (B) of the backrest is articulated with the section (L) (not shown) of lumbar support which in turn is articulated with the upper section (A) (not shown), by means of two pairs of screws and nuts (Bl) (no-mos -trados) and (B2) positioned in the rectangular recesses (B3) (not-shown) and (B4) respectively. The lumbar support section (L) is held in place by means of two stops (B5) and (B6), front and rear, respectively, constructed in the form of a rectangular steel plate protruding from the edge (B7) of the section. low (B). The edge - (B7) is provided with a slope that serves to adjust with the edge-lower bend of the lumbar support section (L) (not shown). Now referring to Figure 6, the lower part (B) of the reclining backrest of the present invention is formed by a plate of resistant material, provided on its upper part with two semi-circular half-round recesses (R) which slides pivotally between the upper section (A) (not shown) of the backrest, by means of the rounded edges (S) (not shown) of the upper section (A) whose shapes correspond to (R) . The low section (B) of the backrest engages and is maintained in position of the lumbar support section (L) by means of the following mechanism: a) the upper edges (B7) and (B8) of the lower section (B) receive the edge (Ll) and the edge of the boxes (Cl and C2) (not shown) -which host the springs (Q) (not shown) that allow the movement pi votal between both sections (L) and (B) low and causing a force torque when the user's body (not shown) reclines on the high (A) reclining backrest, making it possible for (A) to return to its original position when it stops applying the weight; b) The front (B5) and rear (B6) stops keep the lumbar support section (L) in position within the limits marked by the two inclined sides (B8) and the side (B7) with slope of the section. (B) low backrest. With reference to Figures 5A1 and 5A2, the forms of the front stop (TOF), which is provided with an upper eyebrow with an inclination of 20 °, with respect to the vertical axis, are shown. Referring to FIGS. 5B1 and 5B2, the rear stop shapes (TOT), which is provided with an upper eyebrow with an 18 ° inclination, with respect to the vertical axis, are shown. Now referring to Figure 6, the lower section (B) of the reclining backrest of the present invention is formed with a plate of resistant material to which the semi-circular lateral recesses (R) in the form of a half-round in the middle are made. those pivoting the rounded edges (S) (not shown) of the upper section (A) (not shown) of the backrest; the pair of recesses (B4) on whose upper faces (B8) settle the boxes (Cl) and (C2) (not shown) that house the springs (Q1) (Q2) (not shown) that make the movement possible pivotal of the (A) high section (not shown) of the backrest. The high section (A) of the backrest engages with the low section (B) by means of the lumbar support section (L) (not shown), which is received on the unshaded side (B7) and maintained in position by the stops (TOF) front and (TOT) rear. On the recesses (B4) of the section (B) low are mounted, by means of screws and nuts (not shown) applied in the pairs of holes (B2) and (B3), four supports (SR1), (SR2) , (SR3) and (SR4) metallic ball (not shown) carrying the boxes (Cl) and (C2) (not shown) that house the springs (Q) (not shown). Now in relation to FIG. 7, the support (SP) of the pivotal movement mechanism is formed by a rectangular section of resistant material, bent at its ends at right angles. On the outer faces of the bent ends, a pair of hexagonal-bars (Hl) and (H2) are engaged and welded onto which are inserted the pair of recesses (Ql) and (Q2) (not shown) provided with hexagonal holes. Supported by the hexagonal bars (Hl) and (H2), the springs (Ql) and - (Q2) develop a force torque against the supports (SR1), (SR2), (SR3) and (SR4) (not shown) since these are fixed to the lower section (B) of the reclining backrest of the present invention.

Figure 8 shows the position of the hexagonal bar (Hl) welded to the support (SP). Now with reference to Figure 9, the pivotal movement mechanism of the upper part (A) of the backrest (not shown) has a ball-and-socket mechanism mounted on the left end of the support (SP). hexagonal (H2) (not shown) formed by the patella supports (SR3) and (SR4) that carry the box (C2) that houses the resistor (Q2). The support (SP) is attached to the section (A) high (not shown) of the backrest by means of five screws and respective nuts - (TR1 to TR5), so that when the user's body is reclined - (no -showed) the support (SP) tends to rotate pivotally within the -body of the springs (Ql) and (Q2), by means of the hexagonal bars - (Hl) and (H2). The bodies of springs (Ql) and (Q2) of high strength rubber reinforced with metal springs, are fixed inside -the respective boxes (Cl) and (C2) that rest on the supports (SR1), (SR2) ), (SR3) and (SR4) of patella fixed to section (B) low of the backrest, reason why tend to oppose the force applied by -the body of the user (not-shown). Thus, the invention is described in a preferred embodiment, it is evident to those skilled in the art that various changes and modifications of this invention can be made without departing from the spirit and scope of the following claims.

NOVELTY OF THE INVENTION Having described the invention, it is considered as novelty

Claims (6)

And therefore, what is contained in the following is claimed in property R E I V I N D I C A C I O N S

1. Enhancements to articulated reclining backrest with support -lining for multipurpose armchairs, characterized by being integrated by a first removable section in the form of a plate that includes the part of the lumbar support and a second fixed section in the form of a plate -which provides stability to the movable section, both of which are movable and fixed, articulated by a pivotal movement mechanism formed in spring-resistant material, which makes possible the pivotal movement of the movable section when the weight force of the user's body is applied thereto. and that it recovers the -original position when the force of the user's weight ceases to apply.

2. Improvements to articulated reclining backrest with support-lining for multiple-use armchairs, in accordance with claim 1, characterized in that the upper section of the reclining backrest with lumbar support of the present invention is provided with a pair of rounded profiles laterals that pivot on a pair of correspondent lateral U-shaped supports provided on the upper part of the lower section of the backrest, when the user's body is -refined on the high section.

3. Improvements to articulated reclining backrest with support-lining for multipurpose armchairs, in accordance with claim 1, characterized in that the lumbar support section is strongly-coupled with the upper section of the backrest and proportionally follows the movement pivotal of the latter, providing lumbar support to the user's spine when it rests on the high sec- tion of the backrest.

4. Improvements to articulated reclining backrest with support -lining for multipurpose armchairs, in accordance with claim 1, characterized in that the pivotal movement mechanism articulates it movably to the high and low sections of the backrest and allows the -formation of a force torque by means of high strength rubber springs reinforced with metal springs, which imparts stability and safety when the user's body reclines on the section at the back of the backrest and returns it to its original position when it ceases -the application of the strength of the user's body weight.

5. Improvements to articulated reclining backrest with support-lining for multipurpose armchairs, according to claim 1, characterized in that the mechanism of pivotal movement is -integrated by a support that carries at its ends a mechanism of rotation mounted on the hexagonal bar, formed by the plate supports that carry two boxes that house a respective spring. The support is attached to the upper section of the backrest by means of five respective screws and nuts, so that when the user's body is reclined, the support tends to rotate pivotally within the body of the recesses by means of the hexagonal rods. The bodies of the high strength rubber springs reinforced with metal springs are fixed inside the respective boxes that rest on the frame supports fixed to the lower section of the backrest, which is why they tend to oppose the force applied by the user's body (not-shown).

6. Improvements to articulated reclining backrest with support-lining for multipurpose armchairs, in accordance with claim 1, characterized in that the lower section of the reclining backrest -of the present invention, is formed with a plate of resl material- At the same time, two lateral semicircular U-shaped or half-round recesses are used on the extreme upper parts, in which the rounded edges of the upper section of the backrest pivot; in addition, it has a pair of lower positioned recesses contiguous to the previous ones and in whose upper faces are mounted, by means of screws and nuts applied in two pairs of holes, four metal brackets that carry the boxes that house the springs that they make possible the pivotal movement of the high section of the backrest, which is received on an inclined side and maintained in position by the front and rear stops.