Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C1/00—Chairs adapted for special purposes
  • A47C1/02—Reclining or easy chairs
  • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
  • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
  • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C1/00—Chairs adapted for special purposes
  • A47C1/02—Reclining or easy chairs
  • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
  • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
  • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
  • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C1/00—Chairs adapted for special purposes
  • A47C1/02—Reclining or easy chairs
  • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
  • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
  • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
  • A47C1/03288—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with resilient blocks

Definitions

• Pendulum seat articulating the movements of the seat and backrest
• the invention relates to an articulated seat. More particularly, the present invention relates to a seat that automatically marries the positions of its user, without the need for manipulation by this user.
• a seat is commonly composed of a seat and a folder delimiting between them a space to receive the body of the user.
• Some articulated chairs for relaxation or the office can vary the angle of the backrest relative to the seat, to adapt to the comfort sought by the user.
• the seat and the backrest are articulated relative to each other.
• Easily reversible immobilization means make it possible to maintain the seat and / or the backrest in different inclinations desired by the user / user, generally speaking, at least one of the elements is secured to a frame, in order to confer elements relative mobility relative to each other.
• articulated office chairs with a seat, possibly mounted in rotation, on a foot, a backrest that tilts relative to the seat, and locking means for locking the backrest in a desired position.
• the height of the seat is adjustable relative to the ground, regardless of the inclination of the backrest relative to the seat, and the assembly is blocked by independent locking means.
• WO 2005/051132 describes an articulated seat whose seat is hinged in pendulum mode, but the axes of rotation of the seat on its support, and the axis of the seat on the connecting device, do not have means compensating for rocking movements according to the weight of the user.
• the document FR 2 892 905 also describes an articulated seat whose seat is hinged in pendulum mode, but the adjustment of the resistance to the inclination of the backrest has the disadvantage of being manual, and the axis of pivoting of the backrest positioned under the seat limits the amplitude of the inclination thereof.
• the object of the present invention is to propose an articulated seat which does not have these disadvantages and, in particular, an articulated seat offering a multitude of positions, in use, by the combination of the pendular movements of the seat and the backrest around an axis of rotation and the synchronous mechanism connecting the seat to the backrest.
• This is made possible in particular by the fact that the seat is hinged in a pendular fashion by a main axis of rotation on which two articulated quadrilaterals linked to the seat and the backrest synchronize with the pendulum movement the inclination of the seat and back by gravity.
• this object is achieved by a seat according to the appended claims and more particularly, by the fact that the articulated seat comprising at least one foot, a seat, a back, two lateral supports connected to the foot between which are arranged the seat and the backrest, which is characterized in that two elastic elements attached to the upper part of each lateral support each respectively comprising a first and a second axis of rotation, which articulate in rotation two quadrilaterals positioned symmetrically on each side of the seat.
• each quadrilateral comprises four branches: a first branch articulated in rotation relative to the lateral support around one of said axes of rotation, and to the second branch around a third axis of rotation, a second branch connected to the seated, and articulated in rotation relative to the third branch about a fourth axis of rotation, a third branch, linked to the backrest, and articulated in rotation relative to the fourth branch about a fifth axis of rotation positioned above said fourth axis of rotation, and a fourth branch articulated in rotation relative to the first branch about a sixth axis of rotation.
• said sixth axis of rotation coincides with one of said first or second axes of rotation.
• the ratio of the dimensions of the height of the quadrilateral and said third branch of the quadrilateral is of a value between 1.7 and 2.4.
• the ratio of the dimensions of said first and fourth branches of the quadrilateral is a value between 0.8 and 1.3.
• the ratio between the sum of the dimensions of the first and fourth branches and the sum of the dimensions of the second and third branches of the quadrilateral is of a value between 0.8 and 1.3.
• the seat according to the invention comprises an elastic element comprising at least two elastic means in a housing, of a width substantially greater than the section of said housing, arranged one above the other, horizontally positioning therebetween, a pivot pivoting about one of said first and second axes of rotation.
• Said axis of rotation has at each of its ends two flanges in contact with their central portion with the rubber elements and of dimensions substantially greater than the section of the housing.
• the seat according to the invention comprises an elastic element comprising at least two elastic means in a housing and a pivot integral with said first branch, pivoting about an axis, and positioned between said at least two means resilient, said pivot having at least two re-entrant angles, in contact with the at least two elastic means.
• the section of said pivot comprises an upper part wider than its lower part, these parts defining by their lateral faces two re-entrant angles, the lateral faces of the upper part of said pivot are inclined at more than 45 degrees, and / or the parts upper and lower of said pivot are of a substantially equal height.
• Said housing is parallel to the load support axis, said housing being attached to a lateral support, and said pivot being integral with said first branch of the quadrilateral.
• the seat according to the present invention comprises a manual adjustment means comprising a return means fixed on one side under the seat of said seat, and on the other side to said support or said foot.
• the seat according to the invention comprises a device for locking the rocking movement of the seat.
• Figure 1 is a front view of a first embodiment of the invention.
• Figure 2 shows a side view of the quadrilateral in a replicated position.
• Figure 3 shows a side view of the quadrilateral of Figure 2 in an inclined position.
• Figures 4a and 4b show a side view and front, in partial section, of an elastic member, connecting a branch of the quadrilateral of Figure 2 on the support.
• Figures 5a and 5b show a second particular embodiment of the present invention.
• FIG. 6 shows a third embodiment of the present invention.
• the articulated seat comprises a foot 13, on which is fixed a support 7 having two branches 7a and 7b, which is the carrier frame of a seat 12 and a file 6.
• the axes of rotation (Ga) and (Gb) define a common axis of rotation (G), representing the main axis of rotation of the seat in use.
• the two quadrilaterals (ABCD) and (ABCD) 'with the seat 12 and the backrest 6 thus constitute an assembly pivotally mounted relative to the support 7, around this common axis of rotation. (BOY WUT).
• the arrangement of the seat 12 positioned under the main axis of rotation (G) is in pendulum suspension, in order to favor the positioning of the center of gravity of the user / user close to the main axis of rotation (G) when the seat is in the rest position, the backrest 6 being in the raised position.
• the axes (A), (B), (C) and (D) are horizontal, and constitute the rotational pivot axes of the quadrilateral branches (ABCD).
• Each of the axes (A), (B) and (C) can consist of either a single element, connecting at their end, the two quadrilaterals (ABCD) and (ABCD) 'or two symmetrical elements, each connected to a quadrilateral.
• the axis (D) consists of two elements (D) and (D) '.
• the branches DA and CD are positioned on the inner side of the support 7a.
• These said branches can also, without affecting the operation of the mechanism, be arranged on the outer side or inside said support. These said branches are advantageously arranged together on one side or the other of the support 7a to avoid, in use a lateral twist of the pivot 32a.
• the seat may have several feet, this or these feet being able to position the main axis of rotation (G).
• the pivot 32a pivots around the axis G.
• the quadrilateral (ABCD) is different from a parallelogram. It is convex, has four articulated branches AB, BC, CD and DA, in use, it is deformable.
• the branch AB is linked to the base 12 and the branch BC is linked to the file 6.
• the first branch DA is articulated in rotation to the support 7a by the pivot 32a, and the second branch AB by the axis (A).
• the second branch AB being connected to the seat 12, is articulated in rotation to the third branch BC by the axis (B) which is positioned at the lower part of the backrest 6.
• the third branch BC being linked to the backrest 6 is articulated in rotation by the axis (C), located above (B), the fourth branch CD.
• the fourth branch CD is articulated to the first branch DA by the axis
• the axis (A) is positioned on the front half of the seat 12.
• the axis (D), being positioned at the upper part of the branch DA, is substantially coincident with the axis (Ga).
• the angle (ABC) is the angle formed by the backrest 6 and the seat 12.
• the angle (DAB) is the angle formed by the seat 12 and the DA branch.
• a stop device preferably located between the seat 12 and the backrest 6, close to the axis (B), limits the closure of the angle (ABC) substantially to 90 degrees, and limits the maximum opening of this angle.
• This maximum opening is of a variable value, according to the application of the invention, and can reach 180 degrees.
• the angle (ABC) opens substantially 90 degrees, and the angle (DAB) closes substantially 30 degrees.
• the dimension of a branch is defined by the distance that separates the axes that name it.
• the axis (D) is positioned at the upper part of the branch DA so that the quadrilateral can extend sufficiently along its diagonal AC, to obtain a maximum inclination of the folder.
• the height DH of the quadrilateral (ABCD) comes from the axis (D) and is perpendicular to AB.
• the height dimension DH of the quadrilateral has a value substantially twice the size of the branch BC of DH
• the ratio of the dimensions of the branches D is between 0.8 and 1.3.
• the sum of the dimensions of the branches AB and BC is substantially equal to the sum of the branches CD and DA.
• the ratio (CD + DA) / AB + BC) is between 0.8 and 1.3. These last two values are defined regardless of the degree of inclination of the file 6.
• the axis (A) is positioned on the front half of the seat 12.
• the CD branch being articulated in rotation by the axis (D) near the axis of rotation (Ga), and by the axis (C) on the lower part of the backrest 6, allows to maintain the lower back of the user / user substantially at the same distance from said axis of rotation, regardless of the degree of inclination of the file 6.
• the backrest 6 is tilted back, the quadrilateral (ABCD) extends along its diagonal AC, a transfer of a portion of the weight of the user / user is from the seat 12 to the backrest 6, which pivots around the axes (B) and (C) the angle (ABC) opens, the angle (DAB) closes and the seat 12, moves forward.
• This displacement of the seat 12 forward is compensated by a rocker of the branch DA forwardly according to the angle (a).
• These movements are obtained by repositioning, by gravity, the center of gravity of the user / user near the main axis of rotation of the seat (G). This combination of movements offers a multitude of positions for the user / user, whose weight is balanced between the seat 12 and the backrest 6 whatever the inclination of the latter.
• the axis (A) is positioned on the front half of the seat 12.
• the weight of the user is mainly based on the branch AB and exerts on the axis (B), a restoring force of the file 6 by leveraging the branch BC around its axis (C).
• This restoring force is increasing on the one hand with the dipole of the branch DA of the quadrilateral (ABCD) which reduces the value of the angle (a) and on the other hand with the deployment of this quadrilateral by the lengthening of its AC diagonal which increases the value of the angle (ABC).
• the seat 12 is articulated in double pendulum suspension to the support 7a by the pivot 32a and the axis (A), so the user's center of gravity is positioned near the main axis of rotation (G) by gravity.
• the dimension of the branch BC of the quadrilateral is defined so that the restoring force exerted by the branch AB on the axis (B) balances the weight of the user on the backrest 6 and on the seat 12 whatever the degree of inclination of the backrest 6 with respect to the ground.
• the elastic element E is composed of a housing 14a, containing at least two rubber elements 15a and 16a. This said elastic element is fixed to the upper part of the branch 7a by its housing 14a.
• the elastic element E constitutes a means of damping the oscillatory movements of the branch DA of the quadrilateral (ABCD) around a pivot 32a: the elastic element E operates as a torsion spring, and limits the movement of the movements oscillation up and down the DA branch.
• the rubber members 15a and 16a are disposed one above the other to position the pivot 32a therebetween.
• the pivot 32a is fixed to the upper part of the branch DA. This pivot is flat and in contact by its two upper and lower surfaces with the rubber elements 15a and 16a.
• Two side flanges 17a and 18a are attached to each end of the pivot 32a. These flanges are of a height and a width substantially greater than the section of the housing 14a, they contribute to the lateral positioning of the rubber elements 15a, 16a and the pivot 32a in the housing 14a.
• the width of the pivot 32a is substantially greater than the width of the housing 14a so that the side flanges 17a and 18a are not in contact with the housing 14a.
• the rubber elements 15a and 16a are in contact through their anterior parts and posterior with their housing 14a, and are in contact by their central portion with the side flanges 17a and 18a. This contact surface is limited to their central parts, in order to limit the common contact surface between the lateral flanges 17a and 18a and the rubber elements 15a and 16a.
• One of the faces of the housing 14a is advantageously removable, to facilitate the mounting of the pivot 32a and the rubber elements 15a and 16a within said housing.
• the rubber elements 15a and 16a are slightly compressed vertically during their assembly in their housing 14a in order to position the pivot 32a and to oppose an initial resistance to the oscillation movement of the branch DA integral with the pivot 32a.
• these rubber elements 15a and 16a will be mounted in their housing by vulcanization.
• the elastic element E positions the pivot 32a substantially horizontally. In use, depending on the positioning of the user, the branch
• the branch DA can be positioned inside the branch 7a.
• the lower rubber member 16a and the base of the housing 14a are split into two parts, or openwork, to allow the passage of the DA branch inside the support 7a.
• branch DA can be positioned either inside or outside the support branch 7a, one of the two lateral flanges 17a or 18a is integral with the branch DA or formed by the upper part of this branch. .
• FIG. 5a represents a second embodiment of the invention, in which the elastic element F comprises a damping means which comprises three elastic means 19a, 20a and 21a in a housing 14a, and a support pivot 22a, pendular load, advantageously of polygonal section, pivoting about an axis (G) and positioned between the three elastic means 19a, 20a and 21a.
• the said pivot of support is secured to the DA branch and comprises at least two reentrant angles X and Y in contact with the two elastic means 20a and 21a.
• This damping means may comprise only the two elastic means 20a and 21a to ensure the damping of a pendular load.
• Figure 5b shows the elastic member F of Figure 5a in use.
• the weight of the user / user on the seat 12 of the seat exerts, via the pivot 22a, a downward pressure of the polymer blocks 20a and 21a. This pressure is proportional to the weight of the user and is directed downwards.
• the pendulum movement of the seat drives the pivot 22a between the elastic means which exerts a restoring force.
• the pivot section 22a has an upper portion wider than its lower part, the latter defining by their lateral faces two re-entrant angles X and Y. These faces and the upper faces of the pivot 22a are in contact by their respective lateral surfaces with polymer blocks 19a, 20a and 21a and are contained in a housing 14a which is parallel to the axis (G), this housing being attachable to the lateral branch 7a, and the pivot 22a being attached to the branch DA which is connected to the seat 12.
• the lateral faces of the upper part of the pivot 22a are inclined at more than 45 degrees relative to the horizontal, and the upper and lower parts of the pivot 22a are of a substantially equal height.
• the seat is provided with a manual adjustment means T and a locking device L of the rocking movement of the seat.
• the manual adjustment means comprises a return element T, for example of the spring type, fixed on one side under the seat 12 of the seat, and on the other side to the support 7 or foot 13.
• the means T compensates for the weight exerted on the backrest 6 of the seat, thus allowing a return to the initial position when the user stands up.
• This seat may comprise a stop means B limiting the return movement of the spring.
• the seat 12 comprises an element H having at least one part in a circular arc sliding relative to the support 7 or the foot 13 during the rocking movement of the seat.
• a locking means L pivoting on its axis (S) advantageously helically threaded, for example of the lever type, makes it possible to block and unblock, by pinching the element H, the inclination of the seat in a certain direction. position desired by the user.
• a control wheel M at one of the ends of the return means T may advantageously make it possible to manually adjust the voltage of said means T.
• the axes of rotation (G) and (D) are merged into a single axis articulated on each branch of the support 7a and 7b.
• this third embodiment may be partially advantageously combined with the elastic elements E or F, the latter being able to substitute the return means T.
• the support 7 can be rotatably mounted by a pneumatic cylinder around the vertical axis of the foot, to allow a rotation of up to 360 degrees of the seat and a height adjustment.
• This support 7 may advantageously comprise armrests 10a and 10b, preferably adjustable in height, respectively integral with the lateral branches 7a and 7b.
• the seat may advantageously comprise a footrest articulated to the mechanism of the seat or having an independent mechanism.
• this seat can be used as office chair, work station, seat for disabled or as a relaxation seat, because it allows a great flexibility of natural positions of its user.

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• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Chairs Characterized By Structure (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=43903855

Family Applications (1)

Country Status (3)

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Family Cites Families (7)

• 2010
  • 2010-03-09 FR FR1000935A patent/FR2957230A1/fr active Pending
  • 2010-12-10 FR FR1004807A patent/FR2968527A1/fr not_active Withdrawn
• 2011
  • 2011-02-25 WO PCT/FR2011/000112 patent/WO2011110753A1/fr not_active Ceased
  • 2011-02-25 EP EP11714345A patent/EP2571399A1/de not_active Withdrawn

Non-Patent Citations (1)

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