WO2010136660A1 - Method for tilting the backrest of a seat - Google Patents

Method for tilting the backrest of a seat Download PDF

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Publication number
WO2010136660A1
WO2010136660A1 PCT/FR2009/050988 FR2009050988W WO2010136660A1 WO 2010136660 A1 WO2010136660 A1 WO 2010136660A1 FR 2009050988 W FR2009050988 W FR 2009050988W WO 2010136660 A1 WO2010136660 A1 WO 2010136660A1
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WO
WIPO (PCT)
Prior art keywords
backrest
seat
frame
tilting
bars
Prior art date
Application number
PCT/FR2009/050988
Other languages
French (fr)
Inventor
Etienne Girardin
Jean Antoine Krommenacker
Original Assignee
Steelcase Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steelcase Sa filed Critical Steelcase Sa
Priority to ES09784395.7T priority Critical patent/ES2531969T3/en
Priority to EP09784395.7A priority patent/EP2434929B1/en
Priority to PCT/FR2009/050988 priority patent/WO2010136660A1/en
Publication of WO2010136660A1 publication Critical patent/WO2010136660A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/48—Support for the head or the back for the back of freely-rotatable type

Definitions

  • the present invention relates to a mechanism for controlled tilting of a seat back relative to a frame of said seat.
  • the idea of control of the tilt means in this case that the pivoting of the backrest is effected against return means that implement a variable voltage during the tilting movement, and also that the latter is performed according to a race limited.
  • the control constraints of the tilting are a bit peculiar in the context of the present invention, because the aforementioned framework defines in fact a horizontal axis of rotation around which the backrest can rotate, hence a management of the comfort of seated by a mechanism confined to said backrest and not, as is often the case in the seatbacks, for a tilting mechanism which originates at the level of the support of the seat and whose tension is adjustable to level, combined with a simple pivoting of the backrest.
  • the amplitude of the tilting is conventionally defined between a first stable angular position of repose, that which takes the file for example in the absence of user, and a second maximum tilting angular position which is the extreme inclined position that can take the folder when the user rejects his bust backwards.
  • the return means are then interposed between said frame and the backrest, to recall the backrest in its first stable position relative to the frame, that is to say to the rest of the seat, after it has been subject to a switchover.
  • the dynamic user comfort that is to say the response of the file to any request by the user, regardless of its position, being managed in the same folder, said return means are placed, according to the present invention , in the record in order to exercise a recall couple with respect to the pivot axis, which is in this case defined by two integral pivots of the frame around which said backrest is articulated laterally.
  • the return means consist, at each pivot, of at least one elastic flexible bar placed on each side of a horizontal median plane comprising the pivot axis, a first end of each bar being fixed to the backrest, the second end being free and in contact with a stop of the pivot.
  • the choice of elongate bending springs, arranged above and below the tilting axis, results in particular from the shape of the backrest, having a frame or periphery such that the lateral sides are V-shaped, hence the possibility of placing in each branch of the V at least one flexible bar.
  • the backrest can indeed be in various configurations, for example a plastic shell covered with a quilting, or a peripheral frame between the sides of which a fabric is stretched. More specifically, the pins integral with the frame are each provided with a plate which exceeds two pins adapted to cooperate with the free ends of the spring bars, which are arranged in a housing having a side wall is provided to limit their elastic deflection.
  • said flexible bars are doubled on both sides of the median plane, and consist of homologous parallelepiped bars fixed to the backrest. There is therefore, on either side of the axis, a pair of bars juxtaposed in width, which increases the response flexibility of the folder, varying differentially the tension of the folder according to the applied force.
  • the flexible bars are fixed in pairs to the hull or to the backrest frame, arranged in lateral housings of which a wall serves as a stop during the deflection of the bars. It has been mentioned before the stops placed on the plate equipping the pivots, which are therefore connected to the frame of the seat, with which cooperate the return means. These are therefore subject to other stops to limit the tilt angle, which are this time provided in the folder.
  • the ends of the flexible bars to be fixed to the frame or to the shell are secured to a tip itself fixed frame or hull.
  • the flexible bars can of course be individually fixed to the frame or to the hull.
  • said flexible bars are first attached to an insert having housings for the bars, a wall serves as a stop during the deflection of the bars, said insert then being secured to the frame or to the shell of the backrest.
  • these inserts are made of cast aluminum.
  • each flexible bar in contact with the abutment of the pivot comprises a plastic cap, so as not to generate noise and to reduce the wear that can come from the friction of the bar against the pin protruding from the pivot plate.
  • This cap is for example tight grip at the end of these bars.
  • a polyoxymethylene ring is preferably interposed between each pivot and the frame or the shell of the backrest.
  • the assembly of the assembly that is to say the fastening of the backrest to the frame forming the main structure of the seat can be made by bolting the pivots to ends arranged laterally to the backrest and intended to be attached to the frame of the seat.
  • FIG. 1 is a perspective view of a seat according to the invention with a backrest that can tilt relative to an axis joining the rear ends of the armrests;
  • FIG. 2 shows an exploded perspective view, a folder according to the present invention
  • the seat (1) described by way of example conventionally comprises a seat (2) and a backrest (3) with a plastic shell on which is fixed a padding, said backrest (3) being pivotally mounted by relative to a framework (4) comprising in this case in particular the front legs (5, 5 ') and armrests (6, 6') made on each side of the seat (1) in the same tubular structure structure of which rear upper end ends at the pivots of the backrest (3).
  • a tip (7) for example aluminum having a cylindrical end provided with reliefs is plugged tight into the tubes of the armrests (6, 6 ') at their free end.
  • a bore (9) opening on the backrest (3) is provided for housing a pivot (10) having an end plate (11) provided with pins (12, 12 ').
  • the assembly is mounted through an orifice (13) made laterally in the shell (14) of the backrest (3) constituting a free connection in rotation.
  • a rotationally improving guide washer (15) is placed between the pivot (11) and the wall of the orifice (13), mounted in the latter where it is locked in rotation by means of a lug.
  • the backrest comprises a solid shell (14), coated at the end of assembly by a ring (20) which covers the lateral mechanical pivoting connections.
  • the file may also include a padding, according to a variant that does not change the technical structure described above.
  • the operation is as follows: when the user prints a tilting of the backrest (3), the relative movement backrest (3) / endpiece (7) (and thus backrest (3) / frame (4)) results in bending the bars flexible (16, 16 ') in the direction of arrows F, F', since the pins (12, 12 ') push their free ends, as can be seen in Figure 3.
  • Said insert (18) is actually housed in recesses (23, 23 ') (see Figure 2) formed in the shell (14) to accommodate its lateral branches, which are configured to fit the particular shape of the backrest, and therefore the hull (14).
  • the ring (20) when installed with metal clips (24), covers all of the lateral tilt control mechanisms according to the present invention.
  • Figure 4 shows the attachment of flexible spring bars (16, 16 '), for example of square section to 5 mm side, in the insert (18).
  • the assembly of inserts (18) is made after that of the pivots (10), which itself follows that of the rings (15) in the shell (14) of the folder (3).
  • the positioning of the pivot (10) in the endpiece (7) is effected by means of a rotational locking connection in the form of a hexagon nut (25), before tightening by screw (26) in said mouthpiece (7).
  • the solid shell (14) can be replaced by a peripheral frame between the sides of which is stretched a fabric (the ring (20) is then replaced by side covers), or the frame (4) can be of different form without significantly changing the structure of the invention.

Abstract

The invention relates to a mechanism for the controlled tilting of the backrest (3) of a seat (1) relative to a framework (4) of the seat (1) defining a pivoting axis with a horizontal course, the tilting amplitude being defined between a first stable angular rest position and a second angular position of maximum tilting, a return means (16, 16') being inserted between said framework (4) and the backrest (3) to return the backrest (3) to the first stable position thereof in the event of tilting. Said mechanism is characterised in that said return means (16, 16') is placed inside the backrest (3) and exerts a return torque relative to the pivoting axis, which is defined by two pivots (10) rigidly connected to the framework (4) about which said backrest (3) is laterally pivotably connected.

Description

Mécanisme de basculement du dossier d'un siège Tilting mechanism of a seat back
La présente invention concerne un mécanisme de basculement contrôlé du dossier d'un siège par rapport à une ossature dudit siège. L'idée de contrôle du basculement signifie en l'occurrence que le pivotement du dossier s'effectue à rencontre de moyens de rappel qui mettent en œuvre une tension variable lors du mouvement de basculement, et aussi que ce dernier s'effectue selon une course limitée.The present invention relates to a mechanism for controlled tilting of a seat back relative to a frame of said seat. The idea of control of the tilt means in this case that the pivoting of the backrest is effected against return means that implement a variable voltage during the tilting movement, and also that the latter is performed according to a race limited.
Les contraintes de contrôle du basculement sont un peu particulières dans le contexte de la présente invention, car l'ossature mentionnée définit en fait un axe de pivotement d'allure horizontale autour duquel le dossier peut tourner, d'où une gestion du confort d'assise par un mécanisme confiné au niveau dudit dossier et non pas, comme c'est souvent le cas dans les dossiers de sièges, pour un mécanisme de basculement qui prend naissance au niveau du support de l'assise et dont la tension est réglable à ce niveau, combiné à un pivotement simple du dossier.The control constraints of the tilting are a bit peculiar in the context of the present invention, because the aforementioned framework defines in fact a horizontal axis of rotation around which the backrest can rotate, hence a management of the comfort of seated by a mechanism confined to said backrest and not, as is often the case in the seatbacks, for a tilting mechanism which originates at the level of the support of the seat and whose tension is adjustable to level, combined with a simple pivoting of the backrest.
L'amplitude du basculement est classiquement définie entre une première position angulaire de repos stable, celle que prend le dossier par exemple en l'absence d'utilisateur, et une seconde position angulaire de basculement maximal qui est la position inclinée extrême que peut prendre le dossier lorsque l'utilisateur rejette son buste vers l'arrière.The amplitude of the tilting is conventionally defined between a first stable angular position of repose, that which takes the file for example in the absence of user, and a second maximum tilting angular position which is the extreme inclined position that can take the folder when the user rejects his bust backwards.
Les moyens de rappel sont alors interposés entre ladite ossature et le dossier, en vue de rappeler le dossier dans sa première position stable par rapport à l'ossature, c'est-à-dire au reste du siège, après qu'il ait été soumis à un basculement.The return means are then interposed between said frame and the backrest, to recall the backrest in its first stable position relative to the frame, that is to say to the rest of the seat, after it has been subject to a switchover.
Le confort d'utilisation dynamique, c'est-à-dire la réponse du dossier à toute sollicitation par l'utilisateur, quelle que soit sa position, étant géré dans le dossier même, lesdits moyens de rappel sont placés, selon la présente invention, dans le dossier en vue d'exercer un couple de rappel par rapport à l'axe de pivotement, lequel est en l'occurrence défini par deux pivots solidaires de l'ossature autour desquels ledit dossier est articulé latéralement.The dynamic user comfort, that is to say the response of the file to any request by the user, regardless of its position, being managed in the same folder, said return means are placed, according to the present invention , in the record in order to exercise a recall couple with respect to the pivot axis, which is in this case defined by two integral pivots of the frame around which said backrest is articulated laterally.
La configuration propre à l'invention selon laquelle le dossier pivote en réalité entre deux pivots latéraux, ainsi que l'exigence d'un couple de rappel améliorant sensiblement le ressenti de l'utilisateur et donc le confort d'usage, imposent cependant une mise en œuvre, voire une structure, particulières pour les moyens de rappel utilisés.The configuration of the invention according to which the backrest actually pivots between two lateral pivots, as well as the requirement of a restoring torque substantially improving the feeling of the user and therefore the comfort of use, however require implement, or a structure, particular for the return means used.
Ainsi, selon une configuration possible, les moyens de rappel sont constitués, au niveau de chaque pivot, d'au moins une barre flexible élastique placée de chaque côté d'un plan médian horizontal comprenant l'axe de pivotement, une première extrémité de chaque barre étant fixée au dossier, la seconde extrémité étant libre et au contact d'une butée du pivot.Thus, according to one possible configuration, the return means consist, at each pivot, of at least one elastic flexible bar placed on each side of a horizontal median plane comprising the pivot axis, a first end of each bar being fixed to the backrest, the second end being free and in contact with a stop of the pivot.
Le choix de ressorts de flexion de forme allongée, disposés au-dessus et en dessous de l'axe de basculement, résulte notamment de la forme du dossier, présentant un cadre ou une périphérie tels que les côtés latéraux sont en V, d'où la possibilité de placer dans chaque branche du V au moins une barre flexible. Le dossier peut en effet se présenter selon diverses configurations, par exemple une coque en plastique revêtue d'un matelassage, ou un cadre périphérique entre les côtés duquel un tissu est tendu. Plus précisément, les pivots solidaires de l'ossature sont munis chacun d'une platine dont dépassent deux pions aptes à coopérer avec les extrémités libres des barres ressort, lesquelles sont disposées dans un logement dont une paroi latérale est prévue pour limiter leur déflexion élastique.The choice of elongate bending springs, arranged above and below the tilting axis, results in particular from the shape of the backrest, having a frame or periphery such that the lateral sides are V-shaped, hence the possibility of placing in each branch of the V at least one flexible bar. The backrest can indeed be in various configurations, for example a plastic shell covered with a quilting, or a peripheral frame between the sides of which a fabric is stretched. More specifically, the pins integral with the frame are each provided with a plate which exceeds two pins adapted to cooperate with the free ends of the spring bars, which are arranged in a housing having a side wall is provided to limit their elastic deflection.
De préférence, lesdites barres flexibles sont doublées des deux côtés du plan médian, et constituées de barres parallélépipédiques homologues fixées au dossier. Il y a donc, de part et d'autre de l'axe, un couple de barres juxtaposées dans la largeur, qui augmente la souplesse en réponse du dossier, faisant varier de manière différentielle la tension du dossier selon l'effort appliqué.Preferably, said flexible bars are doubled on both sides of the median plane, and consist of homologous parallelepiped bars fixed to the backrest. There is therefore, on either side of the axis, a pair of bars juxtaposed in width, which increases the response flexibility of the folder, varying differentially the tension of the folder according to the applied force.
Selon une configuration possible, les barres flexibles sont fixées par paire à la coque ou au cadre du dossier, disposées dans des logements latéraux dont une paroi sert de butée lors de la déflexion des barres. Il a été fait état auparavant des butées placées sur la platine équipant les pivots, qui sont par conséquent reliées à l'ossature du siège, avec lesquelles coopèrent les moyens de rappel. Ceux-ci sont donc assujettis à d'autres butées en vue de limiter l'angle de basculement, qui sont cette fois prévues dans le dossier.According to one possible configuration, the flexible bars are fixed in pairs to the hull or to the backrest frame, arranged in lateral housings of which a wall serves as a stop during the deflection of the bars. It has been mentioned before the stops placed on the plate equipping the pivots, which are therefore connected to the frame of the seat, with which cooperate the return means. These are therefore subject to other stops to limit the tilt angle, which are this time provided in the folder.
En fait, plus précisément, dans le cas d'une fixation par paire, industriellement plus judicieuse car économiquement plus favorable en termes de process, les extrémités des barres flexibles à fixer au cadre ou à la coque sont solidarisées à un embout lui-même fixé au cadre ou à la coque. Alternativement, les barres flexibles peuvent bien entendu être fixées individuellement au cadre ou à la coque.In fact, more precisely, in the case of pair fastening, industrially more judicious because economically more favorable in terms of process, the ends of the flexible bars to be fixed to the frame or to the shell are secured to a tip itself fixed frame or hull. Alternatively, the flexible bars can of course be individually fixed to the frame or to the hull.
De préférence, lesdites barres flexibles sont d'abord fixées à un insert comportant des logements pour les barres, dont une paroi sert de butée lors de la déflexion des barres, ledit insert étant ensuite solidarisé au cadre ou à la coque du dossier. Selon une possibilité, ces inserts sont en aluminium moulé.Preferably, said flexible bars are first attached to an insert having housings for the bars, a wall serves as a stop during the deflection of the bars, said insert then being secured to the frame or to the shell of the backrest. According to one possibility, these inserts are made of cast aluminum.
Selon l'invention, il est prévu qu'au moins chaque barre flexible en contact avec la butée du pivot comporte un capuchon en matière plastique, de manière à ne pas générer de bruit et à réduire l'usure qui peut provenir du frottement de la barre contre le pion dépassant de la platine du pivot. Ce capuchon est par exemple emmanché serré à l'extrémité de ces barres.According to the invention, it is provided that at least each flexible bar in contact with the abutment of the pivot comprises a plastic cap, so as not to generate noise and to reduce the wear that can come from the friction of the bar against the pin protruding from the pivot plate. This cap is for example tight grip at the end of these bars.
Pour que le basculement, c'est-à-dire en réalité la rotation, du dossier s'effectue dans de bonnes conditions, une bague en polyoxyméthylène est de préférence interposée entre chaque pivot et le cadre ou la coque du dossier.In order for the tilting, that is to say in fact the rotation, of the backrest to be effected in good conditions, a polyoxymethylene ring is preferably interposed between each pivot and the frame or the shell of the backrest.
Enfin, selon une configuration possible, le montage de l'ensemble, c'est-à- dire la solidarisation du dossier à l'ossature formant la structure principale du siège peut s'effectuer par boulonnage des pivots à des embouts disposés latéralement au dossier et prévus pour être fixés à l'ossature du siège.Finally, according to one possible configuration, the assembly of the assembly, that is to say the fastening of the backrest to the frame forming the main structure of the seat can be made by bolting the pivots to ends arranged laterally to the backrest and intended to be attached to the frame of the seat.
Le mécanisme de basculement de l'invention va à présent être décrit plus en détail, en référence aux figures annexées, pour lesquelles : - la figure 1 est une vue en perspective d'un siège selon l'invention avec un dossier pouvant basculer par rapport à un axe rejoignant les extrémités arrière des accoudoirs ;The tilting mechanism of the invention will now be described in more detail with reference to the appended figures for which: - Figure 1 is a perspective view of a seat according to the invention with a backrest that can tilt relative to an axis joining the rear ends of the armrests;
- la figure 2 représente, en vue perspective éclatée, un dossier selon la présente invention ;- Figure 2 shows an exploded perspective view, a folder according to the present invention;
- la figure 3 montre en vue perspective sous une incidence latérale le dossier montré en figure précédente, en phase assemblée ; et- Figure 3 shows in perspective view under a side impact the file shown in the previous figure, in the assembled phase; and
- la figure 4 représente un insert prémonté avec les barres ressort flexibles. En référence à la figure 1 , le siège (1) décrit à titre d'exemple comporte classiquement une assise (2) et un dossier (3) à coque plastique sur laquelle est fixé un matelassage, ledit dossier (3) étant monté pivotant par rapport à une ossature (4) comportant en l'espèce notamment les pieds avant (5, 5') et les accoudoirs (6, 6') réalisés de chaque côté du siège (1) dans une même structure d'allure tubulaire dont l'extrémité supérieure arrière se termine au niveau des pivots du dossier (3).- Figure 4 shows a preassembled insert with flexible spring bars. Referring to Figure 1, the seat (1) described by way of example conventionally comprises a seat (2) and a backrest (3) with a plastic shell on which is fixed a padding, said backrest (3) being pivotally mounted by relative to a framework (4) comprising in this case in particular the front legs (5, 5 ') and armrests (6, 6') made on each side of the seat (1) in the same tubular structure structure of which rear upper end ends at the pivots of the backrest (3).
En réalité, comme cela apparaît en figure 2, un embout (7) par exemple en aluminium comportant une extrémité cylindrique munie de reliefs est enfiché serré dans les tubes des accoudoirs (6, 6') à leur extrémité libre. Un alésage (9) s'ouvrant côté dossier (3) est prévu pour loger un pivot (10) présentant une platine d'extrémité (11) munie de pions (12, 12'). L'ensemble est monté au travers d'un orifice (13) pratiqué latéralement dans la coque (14) du dossier (3) constituant une liaison libre en rotation. Une rondelle (15) de guidage améliorant la rotation est placée entre le pivot (11) et la paroi de l'orifice (13), montée dans ce dernier où elle est bloquée en rotation à l'aide d'un ergot.In fact, as shown in Figure 2, a tip (7) for example aluminum having a cylindrical end provided with reliefs is plugged tight into the tubes of the armrests (6, 6 ') at their free end. A bore (9) opening on the backrest (3) is provided for housing a pivot (10) having an end plate (11) provided with pins (12, 12 '). The assembly is mounted through an orifice (13) made laterally in the shell (14) of the backrest (3) constituting a free connection in rotation. A rotationally improving guide washer (15) is placed between the pivot (11) and the wall of the orifice (13), mounted in the latter where it is locked in rotation by means of a lug.
Des couples de barres ressort flexibles (16, 16') dont l'extrémité destinée à coopérer avec les pions (12, 12') est recouverte d'un capuchon (17, 17') sont prémontées dans un insert ou cage (18) qui maintient et guide les barres (16, 16') lorsqu'elles fléchissent sous l'effet d'une sollicitation (typiquement un basculement du dossier). Le pivot (10) est fixé à l'embout (7) à l'aide d'une vis (19) et l'insert (18) est solidarisé à la coque (14) par des vis (non représentées) dont les sièges (19) dépassent des branches de l'insert (18). Seule une des structures latérales du dossier (3) de fixation / contrôle du pivotement apparaît en figure 2, l'autre étant strictement symétrique. Dans l'exemple représenté, le dossier comporte une coque pleine (14), revêtue en fin de montage par un anneau (20) qui recouvre les liaisons mécaniques latérales de pivotement. Le dossier peut également comporter un matelassage, selon une variante qui ne change cependant pas la structure technique décrite auparavant. Le fonctionnement est le suivant : lorsque l'utilisateur imprime un basculement au dossier (3), le mouvement relatif dossier (3)/embout (7) (et donc dossier (3)/ossature (4)) aboutit à faire fléchir les barres flexibles (16, 16') dans la direction des flèches F, F', puisque les pions (12, 12') repoussent leurs extrémités libres, comme c'est visible en figure 3. Si le mouvement du dossier (3) se poursuit, le fléchissement s'accentue jusqu'à ce que les extrémités libres des barres (16, 16') arrivent au contact des parois respectivement (21 , 21 '). Les capuchons (17, 17') minimisent d'une part le bruit que pourrait générer le contact avec chaque pion (12, 12'), et d'autre part l'usure due aux frottements. Une cale de précontrainte peut additionnellement être placée dans la zone (22). Les barres (16, 16') sont en réalité recouvertes par l'insert ou cage (18), puisqu'elles y sont prémontées, comme cela est montré en figure 4. Pour améliorer la lisibilité du dessin, l'insert (18) n'est pas représenté sur cette figure 3. Ledit insert (18) est en réalité logé dans des évidements (23, 23') (voir en figure 2) pratiqués dans la coque (14) pour loger ses branches latérales, lesquelles sont configurées pour s'adapter à la forme particulière du dossier, et par conséquent de la coque (14). L'anneau (20), lorsqu'il est installé à l'aide de clips métalliques (24), recouvre la totalité des mécanismes latéraux de contrôle du basculement selon la présente invention.Flexible spring bar pairs (16, 16 ') whose end intended to cooperate with the pins (12, 12') is covered with a cap (17, 17 ') are premounted in an insert or cage (18) which holds and guides the bars (16, 16 ') when they flex under the effect of a stress (typically a tilting of the backrest). The pivot (10) is fixed to the end piece (7) by means of a screw (19) and the insert (18) is secured to the shell (14) by screws (not shown) whose seats (19) protrude from the branches of the insert (18). Only one of the lateral structures of the folder (3) fixation / pivot control appears in Figure 2, the other being strictly symmetrical. In the example shown, the backrest comprises a solid shell (14), coated at the end of assembly by a ring (20) which covers the lateral mechanical pivoting connections. The file may also include a padding, according to a variant that does not change the technical structure described above. The operation is as follows: when the user prints a tilting of the backrest (3), the relative movement backrest (3) / endpiece (7) (and thus backrest (3) / frame (4)) results in bending the bars flexible (16, 16 ') in the direction of arrows F, F', since the pins (12, 12 ') push their free ends, as can be seen in Figure 3. If the movement of the backrest (3) continues , the deflection increases until the free ends of the bars (16, 16 ') come into contact with the walls respectively (21, 21'). The caps (17, 17 ') minimize on the one hand the noise that could generate the contact with each pin (12, 12'), and on the other hand the wear due to friction. A prestressing wedge may additionally be placed in the zone (22). The bars (16, 16 ') are actually covered by the insert or cage (18), since they are pre-assembled therein, as shown in FIG. 4. To improve the readability of the drawing, the insert (18) is not shown in this figure 3. Said insert (18) is actually housed in recesses (23, 23 ') (see Figure 2) formed in the shell (14) to accommodate its lateral branches, which are configured to fit the particular shape of the backrest, and therefore the hull (14). The ring (20), when installed with metal clips (24), covers all of the lateral tilt control mechanisms according to the present invention.
La figure 4 montre la fixation des barres ressort (16, 16') flexibles, par exemple de section carrée à 5 mm de côté, dans l'insert (18). Le montage des inserts (18) s'effectue après celui des pivots (10), qui suit lui-même celui des bagues (15) dans la coque (14) du dossier (3). Le positionnement du pivot (10) dans l'embout (7) s'effectue au moyen d'une liaison bloquante en rotation prenant la forme d'un écrou à six pans (25), avant le serrage par vis (26) dans ledit embout (7).Figure 4 shows the attachment of flexible spring bars (16, 16 '), for example of square section to 5 mm side, in the insert (18). The assembly of inserts (18) is made after that of the pivots (10), which itself follows that of the rings (15) in the shell (14) of the folder (3). The positioning of the pivot (10) in the endpiece (7) is effected by means of a rotational locking connection in the form of a hexagon nut (25), before tightening by screw (26) in said mouthpiece (7).
La description ci-dessus, au moyen de l'exemple illustré, ne doit pas être considérée comme exhaustive de l'invention, qui comporte au contraire des variantes. Ainsi, la coque pleine (14) peut-être remplacée par un cadre périphérique entre les côtés duquel est tendu un tissu (l'anneau (20) est alors remplacé par des caches latéraux), ou l'ossature (4) peut être de forme différente, sans que cela change notablement la structure de l'invention. The description above, by means of the illustrated example, should not be considered as exhaustive of the invention, which has variants on the contrary. Thus, the solid shell (14) can be replaced by a peripheral frame between the sides of which is stretched a fabric (the ring (20) is then replaced by side covers), or the frame (4) can be of different form without significantly changing the structure of the invention.

Claims

REVENDICATIONS
1. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1) par rapport à une ossature (4) du siège (1) définissant un axe de pivotement d'allure horizontale, l'amplitude du basculement étant définie entre une première position angulaire de repos stable et une seconde position angulaire de basculement maximal, des moyens de rappel (16 16') étant interposés entre ladite ossature (4) et le dossier (3) pour rappeler le dossier (3) dans sa première position stable en cas de basculement, caractérisé en ce que lesdits moyens de rappel (16, 16') sont placés dans le dossier (3) et exercent un couple de rappel par rapport à l'axe de pivotement, lequel est défini par deux pivots (10) solidaires de l'ossature (4) autour desquels ledit dossier (3) est articulé latéralement.1. Mechanism for controlled tilting of the backrest (3) of a seat (1) relative to a frame (4) of the seat (1) defining a pivot axis of horizontal shape, the amplitude of the tilt being defined between a first angular position of stable rest and a second maximum tilting angular position, return means (16 16 ') being interposed between said frame (4) and the backrest (3) to recall the backrest (3) in its first stable position in the event of tilting, characterized in that said return means (16, 16 ') are placed in the backrest (3) and exert a return torque with respect to the pivot axis, which is defined by two pivots (10 ) integral with the frame (4) around which said backrest (3) is articulated laterally.
2. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1) selon la revendication précédente, caractérisé en ce que les moyens de rappel sont constitués, au niveau de chaque pivot (10), d'au moins une barre flexible (16, 16') élastique placée de chaque côté d'un plan médian horizontal comprenant l'axe de pivotement, une première extrémité de chaque barre (16, 16') étant fixée au dossier (3), la seconde extrémité étant libre et au contact d'une butée (12, 12') du pivot (10).2. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to the preceding claim, characterized in that the return means are constituted, at each pivot (10), of at least one flexible bar (16, 16 ') elastic on each side of a horizontal median plane comprising the pivot axis, a first end of each bar (16, 16') being fixed to the backrest (3), the second end being free and in contact with a stop (12, 12 ') of the pivot (10).
3. - Mécanisme de basculement contrôlé du dossier (3) d'un siège (1) selon la revendication précédente, caractérisé en ce que les pivots (10) solidaires de l'ossature (4) sont munis chacun d'une platine (11) dont dépassent deux pions (12, 12') aptes à coopérer avec les extrémités libres des barres (16, 16') ressort, lesquelles sont disposées dans un logement dont une paroi latérale (21 , 21 ') est prévue pour limiter leur déflexion élastique.3. - Controlled tilt mechanism of the backrest (3) of a seat (1) according to the preceding claim, characterized in that the pivots (10) integral with the frame (4) are each provided with a plate (11). ) of which two studs (12, 12 ') projecting from the free ends of the bars (16, 16') spring, which are arranged in a housing, of which a lateral wall (21, 21 ') is provided to limit their deflection, elastic.
4. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1) selon l'une des revendications 2 et 3, caractérisé en ce que les barres flexibles (16, 16') sont doublées des deux côtés du plan médian, et constituées de barres parallélépipédiques homologues fixées au dossier (3). 4. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to one of claims 2 and 3, characterized in that the flexible bars (16, 16 ') are doubled on both sides of the median plane, and consisting of parallel parallelepipedic bars fixed to the backrest (3).
5. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1) selon l'une des revendications 2 à 4, caractérisé en ce que les barres flexibles (16, 16') sont fixées par paire à la coque (14) ou au cadre du dossier (3), disposées dans des logements latéraux dont une paroi sert de butée lors de la déflexion des barres (16, 16').5. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to one of claims 2 to 4, characterized in that the flexible bars (16, 16 ') are fixed in pairs to the hull (14). ) or the backrest frame (3), arranged in lateral housings whose wall serves as a stop when the bars (16, 16 ') are deflected.
6. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1) selon la revendication précédente, caractérisé en ce que les extrémités des barres flexibles (16, 16') à fixer au cadre ou à la coque (14) sont solidarisées à un embout lui-même fixé au cadre ou à la coque (14). 6. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to the preceding claim, characterized in that the ends of the flexible bars (16, 16 ') to be fixed to the frame or to the shell (14) are secured to a tip itself attached to the frame or to the shell (14).
7. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1 ) selon l'une des revendications 2 à 4, caractérisé en ce que les barres flexibles (16, 16') sont fixées à un insert (18) comportant des logements pour les barres (16, 16') dont une paroi (21 , 21 ') sert de butée lors de la déflexion des barres (16, 16'), ledit insert (18) étant solidarisé au cadre ou à la coque (14) du dossier (3).7. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to one of claims 2 to 4, characterized in that the flexible bars (16, 16 ') are attached to an insert (18) comprising housings for the bars (16, 16 ') whose wall (21, 21') serves as a stop during the deflection of the bars (16, 16 '), said insert (18) being secured to the frame or to the shell ( 14) of the file (3).
8. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1 ) selon la revendication précédente, caractérisé en ce que les inserts (18) sont en aluminium moulé.8. Controlled tilting mechanism of the backrest (3) of a seat (1) according to the preceding claim, characterized in that the inserts (18) are made of cast aluminum.
9. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1 ) selon l'une des revendications 2 à 8, caractérisé en ce que au moins chaque barre flexible (16, 16') en contact avec la butée (12, 12') du pivot (10) comporte un capuchon (17, 17') en matière plastique.9. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to one of claims 2 to 8, characterized in that at least each flexible bar (16, 16 ') in contact with the abutment (12) , 12 ') of the pivot (10) comprises a cap (17, 17') of plastics material.
10. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1 ) selon l'une des revendications précédentes, caractérisé en ce qu'une bague (15) en polyoxyméthylène est interposée entre chaque pivot (10) et le cadre ou la coque (14) du dossier (3).10. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to one of the preceding claims, characterized in that a ring (15) of polyoxymethylene is interposed between each pivot (10) and the frame or the shell (14) of the backrest (3).
11. Mécanisme de basculement contrôlé du dossier (3) d'un siège (1 ) selon l'une des revendications précédentes, caractérisé en ce que les pivots (10) sont boulonnés à des embouts (7) disposés latéralement au dossier (3) et prévus pour être fixés à l'ossature (4) du siège (1 ). 11. Mechanism for controlled tilting of the backrest (3) of a seat (1) according to one of the preceding claims, characterized in that the pivots (10) are bolted to end pieces (7) arranged laterally to the backrest (3). and adapted to be fixed to the frame (4) of the seat (1).
PCT/FR2009/050988 2009-05-27 2009-05-27 Method for tilting the backrest of a seat WO2010136660A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES09784395.7T ES2531969T3 (en) 2009-05-27 2009-05-27 Tilt mechanism of the back of a seat
EP09784395.7A EP2434929B1 (en) 2009-05-27 2009-05-27 Method for tilting the backrest of a seat
PCT/FR2009/050988 WO2010136660A1 (en) 2009-05-27 2009-05-27 Method for tilting the backrest of a seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2009/050988 WO2010136660A1 (en) 2009-05-27 2009-05-27 Method for tilting the backrest of a seat

Publications (1)

Publication Number Publication Date
WO2010136660A1 true WO2010136660A1 (en) 2010-12-02

Family

ID=41510781

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2009/050988 WO2010136660A1 (en) 2009-05-27 2009-05-27 Method for tilting the backrest of a seat

Country Status (3)

Country Link
EP (1) EP2434929B1 (en)
ES (1) ES2531969T3 (en)
WO (1) WO2010136660A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050035636A1 (en) * 2003-08-13 2005-02-17 Turner Dennis M. Chair with pivotable chair back
JP2007125219A (en) * 2005-11-04 2007-05-24 Okamura Corp Backrest device of chair
US20070222265A1 (en) * 2006-03-24 2007-09-27 Hni Corporation Reclining chair with enhanced adjustability

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050035636A1 (en) * 2003-08-13 2005-02-17 Turner Dennis M. Chair with pivotable chair back
JP2007125219A (en) * 2005-11-04 2007-05-24 Okamura Corp Backrest device of chair
US20070222265A1 (en) * 2006-03-24 2007-09-27 Hni Corporation Reclining chair with enhanced adjustability

Also Published As

Publication number Publication date
EP2434929A1 (en) 2012-04-04
EP2434929B1 (en) 2014-12-10
ES2531969T3 (en) 2015-03-23

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