EP4501176B1 - Dispositif d'étirement mécanique pour unité de siège mobile et unité de siège - Google Patents

Dispositif d'étirement mécanique pour unité de siège mobile et unité de siège

Info

Publication number
EP4501176B1
EP4501176B1 EP24191883.8A EP24191883A EP4501176B1 EP 4501176 B1 EP4501176 B1 EP 4501176B1 EP 24191883 A EP24191883 A EP 24191883A EP 4501176 B1 EP4501176 B1 EP 4501176B1
Authority
EP
European Patent Office
Prior art keywords
backrest
leg
stretching device
seat
electrically actuated
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP24191883.8A
Other languages
German (de)
English (en)
Other versions
EP4501176A1 (fr
EP4501176C0 (fr
Inventor
Saijun CAI
Xiaohong Li
Gang Song
Zhanzheng LV
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Remacro Technology Co Ltd
Original Assignee
Remacro Technology Co Ltd
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 Remacro Technology Co Ltd filed Critical Remacro Technology Co Ltd
Publication of EP4501176A1 publication Critical patent/EP4501176A1/fr
Application granted granted Critical
Publication of EP4501176C0 publication Critical patent/EP4501176C0/fr
Publication of EP4501176B1 publication Critical patent/EP4501176B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
    • A47C1/0342—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movable backrest-seat unit or back-rest
    • A47C1/0345—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movable backrest-seat unit or back-rest characterised by foot-rests actuated by lazy-tongs
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable inclination
    • A47C1/0242—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable inclination by electric motors
    • 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
    • A47C7/50—Supports for the feet or the legs
    • A47C7/506—Supports for the feet or the legs of adjustable type
    • A47C7/5062—Supports for the feet or the legs of adjustable type rectilinearly

Definitions

  • the present disclosure relates to a mechanical stretching device for movable seat unit and a seat unit including the same.
  • the seat unit typically has a base assembly, a seat assembly, a backrest assembly, and a leg extension device.
  • the seat unit is capable of switching between two or three of a sitting position, a relaxing position and a lying position.
  • the known seat units often employ a single-motor type electrically actuated unit acting between the backrest assembly and the leg stretching device to achieve multiple position changes of the seat unit.
  • the disadvantages of the design are that, on the one hand, the mechanical stretching device has a large number of parts and complex connection relationships, which require high manufacturing and assembly processes, and on the other hand, the electrically actuated unit is arranged between the backrest assembly and the leg stretching device, which is also responsible for the position change of the two assemblies, so that undesired situations, such as stagnation, may occur in the working stroke of the electrically actuated unit.
  • Prior art which can be considered as useful for understanding the invention is disclosed in US2016/100687A1 .
  • the technical problem to be solved in the present disclosure is to provide a seat unit of simpler structure, easier operation and lower manufacturing cost.
  • the "front-back direction” is in terms of an extension direction of the leg stretching device of the seat unit or the mechanical stretching device, and specifically, the "front” refers to a direction facing the leg stretching device, and the “back” refers to a direction facing the backrest.
  • a mechanical stretching device for movable seat unit as defined in claim 1.
  • the mechanical stretching device In an operating mode, the mechanical stretching device is directly switched from the sitting position to the lying position; in a second operating mode, the mechanical stretching device is switched from the lying position to the relaxing position; in a third operating mode, the mechanical stretching device is switched from the sitting position to the relaxing position; in a fourth operating mode, the mechanical stretching device is switched from the relaxing position to the sitting position; and in a fifth operating mode, the mechanical stretching device is directly reset from any intermediate position between the sitting position and the lying position to the sitting position.
  • the leg electrically actuated device acts between the leg stretching device and the seat support
  • the backrest electrically actuated device acts between the backrest support and the seat support
  • a leg crossbar is rigidly connected to the leg stretching device
  • a seat crossbar is rigidly connected to the seat support
  • an end of the leg electrically actuated device is pivoted to the leg crossbar
  • an opposite end of the leg electrically actuated device is pivoted to the seat crossbar
  • the leg electrically actuated device drives the leg crossbar to move away from or close to the seat crossbar, so that the leg stretching device is unfolded or folded.
  • a backrest crossbar is rigidly connected to the backrest support, an end of the backrest electrically actuated device is pivoted to the backrest crossbar, an opposite end of the backrest electrically actuated device is pivoted to the seat crossbar, the backrest electrically actuated device drives the backrest crossbar to move away from or close to the seat crossbar, so that the backrest support is reclined backwards or reset forwards.
  • At least one of the leg electrically actuated device and the backrest electrically actuated device is a linear electric actuator.
  • the linear electric actuator may be a pusher motor or a slider motor.
  • the mechanical stretching device further includes a swing limit mechanism, in which the swing limit mechanism allows the seat support to swing with respect to the base assembly in the sitting position of the mechanical stretching device, and the swing limit mechanism prevents the seat support from swinging with respect to the base assembly in the relaxing position or the lying position of the mechanical stretching device.
  • the seat of the seat unit is prevented from swinging back and forth with respect to the base assembly when the leg stretching device is unfolded, which improves the safety of use.
  • a movable seat unit as defined in claim 7.
  • the leg electrically actuated device acts between the leg stretching device and the seat support
  • the backrest electrically actuated device acts between the backrest support and the seat support
  • a leg crossbar is rigidly connected to the leg stretching device
  • a seat crossbar is rigidly connected to the seat support
  • an end of the leg electrically actuated device is pivoted to the leg crossbar
  • an opposite end of the leg electrically actuated device is pivoted to the seat crossbar
  • the leg electrically actuated device drives the leg crossbar to move away from or close to the seat crossbar, so that the leg stretching device is unfolded or folded.
  • a backrest crossbar is rigidly connected to the backrest support, an end of the backrest electrically actuated device is pivoted to the backrest crossbar, an opposite end of the backrest electrically actuated device is pivoted to the seat crossbar, the backrest electrically actuated device drives the backrest crossbar to move away from or close to the seat crossbar, so that the backrest support is reclined backwards or reset forwards.
  • At least one of the leg electrically actuated device and the backrest electrically actuated device is a linear electric actuator.
  • the mechanical stretching device further includes a swing limit mechanism, in which the swing limit mechanism allows the seat support to swing with respect to the base assembly in the sitting position of the seat unit, and the swing limit mechanism prevents the seat support from swinging with respect to the base assembly in the relaxing position or the lying position of the seat unit.
  • the mechanical stretching device includes a base assembly 1, seat assemblies 2 supported above the base assembly 1 and provided in a mirrored symmetrical arrangement, a leg stretching device 3, and backrest assembly 4. Additionally, the mechanical stretching device further includes an electrically actuated unit 5.
  • the base assembly 1 includes two longitudinal supports 11 extending in parallel to the front-back direction of the mechanical stretching device and two transverse supports 12 connecting between the longitudinal supports 11.
  • the longitudinal supports 11 and the transverse supports 12 constitute a frame structure collectively to movably support the mechanical stretching device on the ground.
  • the base assembly may also be constructed as a circular support supported on the ground, in which a fixing support constituted by a set of parallel extended support rods is rotatably connected on the circular support, and the fixing support is arranged to movably support the mechanical stretching device above the ground.
  • the seat assembly 2 includes a seat support 21 arranged to attach to a seat, and a swing base plate 22 on the longitudinal support 11 fixedly attached to the base assembly 1, in which the seat support 21 is movably connected to the base assembly through a link mechanism.
  • the seat support 21 may swing with respect to a front-back direction of the base assembly 1.
  • the link mechanism includes the swing base plate 22, a front swing rod 23, a back swing rod 24, and a transmission connecting rod 25.
  • a bottom of the swing base plate 22 is fixedly connected to the longitudinal support 11, a front end of a top of the swing base plate 22 is pivoted to the a top end of the front swing rod 23, a back end of a top of the swing base plate 22 is pivoted to a top end of the back swing rod 24, a lower end of the front swing rod 23 and a lower end of the back swing rod 24 are pivoted to the longitudinally extended transmission connecting rod 25 respectively, a front end of the transmission connecting rod 25 is extended upwards and is fixedly connected to a front end of the seat support 21, and an additional connecting rod 26 is fixedly connected between a back end of the transmission connecting rod 25 and the seat support 21.
  • the front swing rod 23 and the back swing rod 24 swing around their respective pivot points with the swing base plate 22, which drives the transmission connecting rod 25 and the seat support 21 to swing with respect to a front-back direction of the base assembly 1.
  • the leg stretching device 3 is constituted by a plurality of links pivoted at each other, which includes a first leg link 31, a second leg link 32, a third leg link 33, a fourth leg link 34, and a footrest mounting plate 35 arranged to attach to the footrest member.
  • a back end of the third leg link 33 is pivoted to the seat support 21, a front end of the third leg link 33 is pivoted to a back end of the second leg link 32, a back end of the fourth leg link 34 is pivoted to a front end of the seat support 21, a front end of the fourth leg link 34 is pivoted to a back end of the first leg link 31, front ends of the first leg link 31 and the second leg link 32 are pivoted to the footrest mounting plates 35 respectively, and respective middle parts of the second leg link 32 and the fourth leg link 34 are pivoted to each other.
  • the pivot point between the fourth leg link 34 and the seat support 21 is positioned further forward than the pivot point between the third leg link 33 and the seat support 21.
  • the backrest assembly 4 includes a backrest support 41 pivoted to the seat support 21.
  • the seat support 41 is constructed with a horizontal segment 41a extending substantially horizontally and a vertical segment 41b extending substantially vertically in the sitting position.
  • a forward-directed free end of the horizontal segment 41a of the backrest support 41 is pivoted to the seat support 21 at the backrest pivot point 45.
  • a backrest crossbar 44 is provided between backrest supports 41 on the left and right sides, and the backrest crossbar 44 is fixedly connected to a transition part between the horizontal segment 41a and the vertical segment 41b of the backrest support 41 by means of the backrest connecting member 43.
  • the mechanical stretching device includes an electrically actuated unit 5, including a leg electrically actuated device 51 for folding and unfolding of the leg stretching device 3 and a backrest electrically actuated device 52 for backward reclining or forward resetting of the backrest support 41.
  • the leg electrically actuated device 51 acts between the leg stretching device 3 and the seat support 2
  • the backrest electrically actuated device 52 acts between the backrest assembly 4 and the seat support 2.
  • the electrically actuated unit 5 is constructed as a linear motor, and the leg electrically actuated device 51 and the backrest electrically actuated device 52 both have a motor head and an actuated part that is displaceable with respect to the motor head, so as to achieve a change in the position of the leg stretching device and the backrest support by means of a change in the distance between the motor head and the corresponding actuated part.
  • the leg electrically actuated device 51 is designed as a slider motor
  • the backrest electrically actuated device 52 is designed as a pusher motor.
  • the backrest electrically actuated device 52 may also be designed as a slider motor, and the leg electrically actuated device may be designed as a pusher motor, or both of them are designed as slider motors or pusher motor, which is not limited herein.
  • a leg crossbar 36 is provided between leg stretching devices 3, and a seat crossbar 27 is provided between seat supports 21, in which respective ends of the seat crossbar 27 are fixedly connected to a bent segment of the additional connecting rod 26, and the additional connecting rod 26 is fixedly connected to the seat support 21.
  • the leg electrically actuated device 51 constructed as a slider motor includes a leg motor head 51a, a motor sliding rail 51b connected to the leg motor head 51a, and a motor slider that is slidable with respect to the motor sliding rail 51b, in which the leg motor head 51a is pivoted to the leg crossbar 36 fixedly connected to the fourth leg link 34, and the motor slider 73 is pivoted to the seat crossbar 27. Therefore, when the leg motor head 51a is moving back and forth with respect to the motor slider 51c along the motor sliding rail 51b, the leg crossbar 36 drives the leg stretching device 3 to unfold forwards or fold backwards by means of the fourth leg link 34.
  • the backrest electrically actuated device 52 constructed as a pusher motor includes a backrest motor head 52a and a motor pusher 52b retractable with respect to the backrest motor head 52a, in which the backrest motor head 52a is pivoted to the seat crossbar 27, and the free end of the motor pusher 52b is pivoted to the backrest crossbar 44. Therefore, when the motor pusher 52b is extended or retrated with respect to the backrest motor head 52a, the backrest crossbar 44 drives the backrest support 41 to rotate around the backrest pivot point 45.
  • a limit protrusion 42 is provided on the backrest support 41, and the limit protrusion 42 may be cooperated with the limit slot 28 provided on the seat assembly 1 to restrict the rotation of the backrest support 41.
  • a connecting plate protruding facing the backrest assembly 4 is formed on the additional connecting rod 26 fixedly connected to the seat support 21, and the limit slot 28 is provided in the connecting plate.
  • the limit slot 28 is extended radially, and the limit protrusion 42 is slidably embedded into the limit slot 28.
  • the mechanical stretching device includes a swing limit mechanism 6, in which the swing limit mechanism 6 includes a first limit member 61, a second limit member 63, a slide slot limit member 64, and a limit driven rod 66.
  • a middle of the first limit member 61 is pivoted to the transmission connecting rod 25, an upper end of the first limit member 61 is provided with a first limit bushing 62 (as shown in Fig. 4 ), a lower end of the first limit member 61 is pivoted to a front end of the second limit member 63, and a back end of the second limit member 63 is provided with a second limit bushing (not shown in the figures).
  • the slide slot limit member 64 is fixedly connected to the transmission connecting rod 25 and is extended upwards from the transmission connecting rod 25 to form a segment with a swing limit slide slot 65, and the second limit bushing may be movably embedded into the swing limit slide slot 65.
  • An end of the limit driven rod 66 is pivoted to an upper part of the first limit member 61, and an opposite end of the limit driven rod 66 is pivoted to the leg stretching device 3, which is pivoted to the third leg link 33 specifically in the present implementation.
  • the swing limit mechanism 6 may be switched between a swing release state and a swing limit state.
  • the mechanical stretching device In the swing release state as shown in Fig. 5 , the mechanical stretching device is in the sitting position, in which both the first limit bushing 62 and the second limit bushing are not in contact with both the front swing rod 23 and the back swing rod 24, so as to allow the front swing rod 23 and the back swing rod 24 to be rotated back and forth, so that the seat support 21 may swing back and forth with respect to the base assembly 1.
  • the leg stretching device 3 unfolding, the third leg link 33 is stretched forward to drive the limit driven rod 66 to move forward, so that the first limit member 61 is rotated in a clockwise direction as shown in Fig. 6 and Fig. 7 .
  • the first limit bushing 62 and the second limit bushing moves in opposite directions respectively, in which the first limit bushing 62 moves forward facing the front swing rod 23, and the second limit bushing in the swing limit slide slot 65 moves backwards facing the back swing rod 24.
  • the leg stretching device 3 of the mechanical stretching device is fully unfolded, as the relaxing position shown in the Fig. 6 or the lying position shown in the Fig. 7 , the first limit bushing 62 is abutted against an interior side of the front swing rod 23, and the second limit bushing is abutted against an interior side of the back swing rod 24, so as to prevent the rotation of the front swing rod 23 and the back swing rod 24, so that the seat support 21 is unable to swing back and forth with respect to the base assembly 1.
  • the backrest support In the sitting position shown in the Fig.1 and Fig. 5 , the backrest support is upright, and the leg stretching device 3 is fully folded below the seat support 21.
  • the leg electrically actuated device 51 and the backrest electrically actuated device 52 are in their initial state respectively, in which a distance between the leg motor head 51a and the motor slider 51c of the leg electrically actuated device 51 is at a minimum, and a distance between the backrest motor head 52a and the motor pusher 52b of the backrest electrically actuated device 52 is at a maximum, i.e., the motor pusher 52b is pushed with respect to the backrest motor head 52a.
  • leg stretching device 3 In the relaxing position shown in the Fig. 2 and Fig. 6 , a relative position between the backrest support 41 and the seat support 21 is kept substantially unchanged as that in the sitting position, and the leg stretching device 3 is fully unfolded forwards.
  • the leg motor head 51a of the leg electrically actuated device 51 moves forwards with respect to the motor slider 51c along the motor sliding rail 51b, so that the distance between the leg motor head 51a and the motor slider 51c is increased, so as to allow the leg crossbar 36 to drive the fourth leg link 34 to be extended forwards and lifted upwards, thereby allowing the leg stretching device 3 to be unfolded from a folding state in the sitting position.
  • the leg stretching device 3 In the lying position shown in Fig. 3 and Fig. 7 , the leg stretching device 3 is in a fully stretched state, and the backrest support 41 is backwards reclined.
  • the motor pusher 52b of the backrest electrically actuated device 52 is retracted facing the backrest motor head 52a, so that the backrest crossbar 44 is pulled forwards, so as to drive the backrest support 41 to be backwards rotated with respect to the seat support 21 at the backrest pivot point 45.
  • the electrically actuated unit 5 is configured with a control module, in which the control module enables the position switching of the mechanical stretching device between multiple operating mode, and the operating mode is selected from a first operating mode, a second operating mode, a third operating mode, a fourth operating mode, and a fifth operating mode.
  • the mechanical stretching device is directly switched from the sitting position to the lying position.
  • both the leg electrically actuated device 51 and the backrest electrically actuated device 52 work simultaneously from their respective initial state, in which the leg motor head 51a move away from the motor slider 51c, and the motor pusher 52b is retracted with respect to the backrest motor head 52a, so that the unfolding of the leg stretching device 3 and the backward reclining of the backrest support 41 are performed simultaneously.
  • the mechanical stretching device is directly switched from the sitting position to the lying position.
  • the mechanical stretching device is switched from the lying position to the relaxing position.
  • the leg motor head 51a of the leg electrically actuated device 51 is kept away from the motor slider 51c, and only the motor pusher 52b of the backrest electrically actuated device 52 are pushed with respect to the backrest motor head 52a until the backrest electrically actuated device 52 is reset to the initial state.
  • the backrest support 41 is rotated around the backrest pivot point 45 in a clockwise direction to forwardly reset from a backward reclining position, so that the mechanical stretching device is switched from the lying position to the relaxing position.
  • the mechanical stretching device is directly switched from the sitting position to the relaxing position.
  • the leg electrically actuated device 51 works from the initial state, and the backrest electrically actuated device 52 is kept unchanged to maintain the initial state.
  • the leg motor head 51a moves away from the motor slider 51c, so that the leg stretching device 3 is unfolded, so as to achieve that the mechanical stretching device is switched from the sitting position to the relaxing position.
  • the fourth operating mode is reversed from the third operating mode.
  • the mechanical stretching device is switched from the relaxing position to the sitting position. Only the leg motor head 51a of the leg electrically actuated device 51 moves close to the motor slider 51c, so that the leg stretching device 3 is folded, so as to achieve that the mechanical stretching device is switched from the relaxing position to the sitting position.
  • the mechanical stretching device is directly reset from any position to the sitting position.
  • both the leg electrically actuated device 51 and the backrest electrically actuated device 52 is switched to their respective initial state simultaneously, in which the leg motor head 51a moves closer to the motor slider 51c, and the motor pusher 52b is pushed with respect to the backrest motor head 52a, so that the folding of the leg stretching device 3 and the forward resetting of the backrest support 41 are performed simultaneously, so as to achieve that the mechanical stretching device is able to directly reset from any position (including positions between the sitting position and the relaxing position, any intermediate positions between the relaxing position and the lying position, or lying position) to the sitting position.
  • the mechanical stretching device when the first operating mode is combined with the second operating mode, the mechanical stretching device is capable of sequentially switching from the sitting position to the relaxing position and to the lying position.
  • the mechanical stretching device When the first operating mode is combined with the fifth operating position, the mechanical stretching device enables a one-touch transformation and a one-touch reset of the mechanical stretching device between the sitting position and the lying position.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (7)

  1. Dispositif d'extension mécanique pour unité siège mobile, comprenant :
    - un support de siège (21), agencé pour se fixer à un siège ;
    - un dispositif d'extension de pieds (3), pivotant au niveau d'une partie avant du support de siège (21) ;
    - un support de dossier (41), pivotant au niveau d'une partie arrière du support de siège (21) ; et
    - une unité à actionnement électrique (5), comprenant un dispositif à actionnement électrique de pieds (51) pour le pliage et le dépliage du dispositif d'extension de pieds (3) et un dispositif à actionnement électrique de dossier (52) pour l'inclinaison vers l'arrière ou le rappel vers l'avant du support de dossier (41), dans lequel le dispositif d'extension mécanique est directement commuté au moins entre une position assise et une position couchée, le dispositif d'extension de pieds (3) est plié sous le support de siège (21) en position assise, le dispositif d'extension de pieds (3) est soulevé vers l'avant et vers le haut et le support de dossier (41) est incliné vers l'arrière en position couchée,
    l'extension du dispositif d'extension de pieds (3) et l'inclinaison vers l'arrière du support de dossier (41) sont effectuées simultanément par l'intermédiaire de l'unité à actionnement électrique (5) lorsque le dispositif d'extension mécanique est commuté de la position assise à la position couchée, le pliage du dispositif d'extension de pieds (3) et le rappel vers l'avant du support de dossier (41) sont effectués simultanément lorsque le dispositif d'extension mécanique est commuté de la position couchée à la position assise,
    le dispositif d'extension mécanique est directement commuté entre la position assise et une position de détente ; en position de détente, le dispositif d'extension de pieds (3) est soulevé vers l'avant et vers le haut, et une position relative entre le support de dossier (41) et le support de siège (21) est maintenue pour être la même en position assise,
    le dispositif d'extension mécanique est commuté séquentiellement de la position assise à la position couchée, puis à la position de détente au moyen de l'unité à actionnement électrique (5),
    le dispositif d'extension mécanique comprend en outre un ensemble base (1) pour supporter le dispositif d'extension mécanique sur le sol, le support de siège (21) est connecté à l'ensemble base (1) au moyen d'un mécanisme de liaison, de manière à basculer dans une direction avant-arrière de l'unité siège par rapport à l'ensemble base (1),
    caractérisé en ce que le mécanisme de liaison comprend une plaque de base pivotante (22), une tige pivotante avant (23), une tige pivotante arrière (24) et une bielle de transmission (25), l'extrémité supérieure respective à la fois de la tige pivotante avant (23) et de la tige pivotante arrière (24) pivote par rapport à la plaque de base pivotante (22), l'extrémité inférieure respective à la fois de la tige pivotante avant (23) et de la tige pivotante arrière (24) pivote par rapport à la bielle de transmission (25), la plaque de base pivotante (22) est solidarisée à l'ensemble base (1), et la bielle de transmission (25) est reliée au support de siège (21).
  2. Dispositif d'extension mécanique selon la revendication 1, dans lequel le dispositif à actionnement électrique de pieds (51) agit entre le dispositif d'extension de pieds (3) et le support de siège (21), et le dispositif à actionnement électrique de dossier (52) agit entre le support de dossier (41) et le support de siège (21).
  3. Dispositif d'extension mécanique selon la revendication 2, dans lequel une barre transversale de pied (36) est solidarisée au dispositif d'extension de pieds (3), une barre transversale de siège (27) est solidarisée au support de siège (21), une extrémité du dispositif à actionnement électrique de pied (51) pivote par rapport à la barre transversale de pied (36), une extrémité opposée du dispositif à actionnement électrique de pied (51) pivote par rapport à la barre transversale de siège (27), et le dispositif à actionnement électrique de pied (51) amène la barre transversale de pied (36) à s'éloigner ou à se rapprocher de la barre transversale de siège (27), de sorte que le dispositif d'extension de pieds (3) soit déplié ou plié.
  4. Dispositif d'extension mécanique selon la revendication 3, dans lequel une barre transversale de dossier (44) est solidarisée au support de dossier (41), une extrémité du dispositif à actionnement électrique de dossier (52) pivote par rapport à la barre transversale de dossier (44), une extrémité opposée du dispositif à actionnement électrique de dossier (52) pivote par rapport à la barre transversale de siège (27), le dispositif à actionnement électrique de dossier (52) amène la barre transversale de dossier (44) à s'éloigner ou à se rapprocher de la barre transversale de siège (27), de sorte que le support de dossier (41) soit incliné vers l'arrière ou rappelé vers l'avant.
  5. Dispositif d'extension mécanique selon la revendication 1, dans lequel au moins l'un du dispositif à actionnement électrique de pied (51) et du dispositif à actionnement électrique de dossier (52) est un actionneur électrique linéaire.
  6. Dispositif d'extension mécanique selon la revendication 1, comprenant en outre un mécanisme de limitation de pivotement (6), dans lequel le mécanisme de limitation de pivotement (6) permet au support de siège (21) de pivoter par rapport à l'ensemble base (1) dans la position assise du dispositif d'extension mécanique, et le mécanisme de limitation de pivotement (6) empêche le support de siège (21) de pivoter par rapport à l'ensemble base (1) dans la position de détente ou la position couchée du dispositif d'extension mécanique.
  7. Unité siège mobile, comprenant un siège, un dossier, un élément repose-pieds et un dispositif d'extension mécanique selon l'une quelconque des revendications 1-6, dans laquelle le support de siège (21) est agencé pour être fixé au siège, le dispositif d'extension de pieds (3) est agencé pour être fixé à l'élément repose-pieds, et le support de dossier (41) est agencé pour être fixé au dossier.
EP24191883.8A 2023-08-02 2024-07-30 Dispositif d'étirement mécanique pour unité de siège mobile et unité de siège Active EP4501176B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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US20240315452A1 (en) * 2023-03-23 2024-09-26 L&P Property Management Company High-leg recliner seating mechanism
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US8608240B2 (en) * 2011-09-09 2013-12-17 La-Z-Boy Incorporated Mechanism and chair for powered combined and independent seat back and leg rest motion
US9603452B2 (en) * 2014-10-14 2017-03-28 Ultra-Mek, Inc. Gliding-reclining seating unit with power actuators
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