EP1191862A1 - Method for managing the control system of a seat with pre-programmed positions and seat therefor - Google Patents

Method for managing the control system of a seat with pre-programmed positions and seat therefor

Info

Publication number
EP1191862A1
EP1191862A1 EP01931774A EP01931774A EP1191862A1 EP 1191862 A1 EP1191862 A1 EP 1191862A1 EP 01931774 A EP01931774 A EP 01931774A EP 01931774 A EP01931774 A EP 01931774A EP 1191862 A1 EP1191862 A1 EP 1191862A1
Authority
EP
European Patent Office
Prior art keywords
seat
actuator
legrest
instant
footrest
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.)
Granted
Application number
EP01931774A
Other languages
German (de)
French (fr)
Other versions
EP1191862B1 (en
Inventor
Laurent Nivet
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.)
Safran Electronics and Defense Actuation SAS
Original Assignee
Labinal 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 Labinal SA filed Critical Labinal SA
Publication of EP1191862A1 publication Critical patent/EP1191862A1/en
Application granted granted Critical
Publication of EP1191862B1 publication Critical patent/EP1191862B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 and lockable 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 and lockable 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
    • 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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03211—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable 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
    • 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
    • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest

Definitions

  • the present invention relates to a method for managing the kinematics of a seat comprising at least three movable seat elements with respect to each other and at least two actuators for moving the three elements with respect to each other, the method comprises - both a step of joint control of the two actuators to modify the configuration of the seat.
  • Such a seat is used in particular in passenger transport aircraft.
  • each seat prefferably has a reclining backrest hinged at one end of a seat, as well as a legrest hinged at the other end of the seat.
  • the backrest and the legrest are both movable, under the control of a clean electric actuator, between a substantially vertical position and substantially horizontal position thus allowing the seat to take several configurations.
  • the seat advantageously comprises devices making it possible, by a single command, to cause the movement of the legrest, the footrest and possibly the backrest, in order to bring the seat, by this single command, into a predetermined configuration in which each seat element has a predetermined position specific to the configuration considered.
  • each of the actuators associated with the different moving parts of the seat can be controlled independently of the others, so that the seat can be brought by the passenger in multiple configurations different from the predetermined configurations.
  • the actuators are started in succession in order to move the elements of the seat one after the other towards their target position.
  • the start-up of one of the actuators is determined by the end of the operating phase of another actuator.
  • the object of the invention is to propose a vehicle seat, and a method for managing its kinematics allowing the seat to be brought into predetermined configurations as quickly as possible, without, however, undesirable intermediate configurations being taken up by the seat during from its passage to the predetermined configuration.
  • the subject of the invention is a method for managing the kinematics of a seat of the aforementioned type, characterized in that said joint control step comprises the following successive steps: - the actuation of a first actuator at a first instant; and
  • the method includes one or more of the following characteristics:
  • It includes a step of detecting the stop of the first actuator during said predetermined time interval and a step of activating the second actuator as soon as the stop of the first actuator is detected;
  • step of jointly controlling the two actuators is a step of bringing the seat into a predetermined configuration, in which two of the mobile elements are in predetermined positions specific to said predetermined configuration;
  • step of detecting the stopping of the first actuator includes a step of detecting that the seat element controlled by the first actuator has reached its predetermined position;
  • the seat comprises a seat, a leg rest articulated relative to the seat between a folded position and an extended position, a footrest movable relative to the leg rest between a retracted position and an extended position, and two actuators arranged, for one, between the seat and the legrest and, for the other, between the legrest and the footrest, the joint control phase of the two actuators being adapted to move the legs to its extended position and the footrest to its extended position, and the first actuator triggered at said first instant is the actuator disposed between the seat and the legrest and the second actuator triggered at said second instant after the first instant is the actuator arranged between the legrest and the footrest;
  • the seat comprises a seat, a leg rest articulated relative to the seat between a folded position and an extended position, a footrest movable relative to the leg rest between a retracted position and an extended position, and two actuators arranged, for one, between the seat and the legrest and, for the other, between the legrest and the footrest, the joint control phase of the two actuators being adapted to move the legrest towards its folded position and the footrest towards its retracted position, and that the first actuator triggered at said first instant is the actuator disposed between the legrest and the footrest and the second actuator triggered at said second instant after first instant is the actuator arranged between the seat and the legrest; and
  • the invention also relates to a vehicle seat comprising at least three movable seat elements with respect to each other, at least two actuators for the displacement of the three elements with respect to each other, and means for jointly controlling the two actuators for modifying the configuration of the seat, characterized in that said joint control means comprise:
  • said joint control means comprise means for detecting the stopping of the first actuator during said interval of predetermined time and means for actuating the second actuator as soon as the stopping of the first actuator is detected.
  • FIG. 1 is a flowchart explaining the operation of the seat by implementing a method of managing its kinematics according to the invention
  • FIG. 3 and 4 are curves illustrating the movement of two seat actuators as a function of time during the implementation of the process for managing the kinematics of the seat according to the invention.
  • the seat 10 shown in Figure 1 is a passenger seat of an aircraft. This seat is fixed to the ground 12 of the aircraft.
  • the seat 10 has a base 14 secured to the ground.12 on which rests a substantially horizontal seat 16. At one end of the seat is articulated a backrest 18 movable between a substantially vertical raised position and a substantially horizontal folded position.
  • a leg rest 20 movable between a substantially vertical folded position below the seat 16 and a substantially horizontal extended position in the extension of the seat 16.
  • the seat 10 further comprises a footrest 22 mounted movable to slide relative to the legrest 20 in the extension thereof.
  • the footrest 22 is movable between a retracted position inside the legrest 20 and an extended position in which it extends the latter and is almost completely extended.
  • a first electric actuator 24 is mounted between the seat 16 and the leg rest 20 in order to ensure movement of the latter between its folded position and its extended position.
  • a second actuator 26 is provided between the legrest 20 and the footrest 22 in order to ensure the movement of the footrest between its retracted position and its extended position.
  • a third actuator 27 is mounted between the seat 16 and the backrest 18 in order to ensure the movement of the backrest between its raised position and its folded position.
  • the three actuators operate at constant speeds which may be different from one actuator to another.
  • Each of the three actuators 24, 26 and 27 is supplied with electric current from a central control unit 28.
  • This control unit is connected separately to each of the actuators 24, 26 and 27 in order to ensure their independent control.
  • the seat includes an armrest 30, on which is fixed a control keyboard 32 allowing independent control of the actuators 24, 26 and 27 in order to cause their displacement.
  • the keyboard 32 also includes keys allowing the passenger to reach, by a single command acting on several actuators, one of two predetermined configurations.
  • the number of predetermined seat configurations can be reduced to one or more than two.
  • the keyboard 32 has two buttons each associated with a predetermined configuration. These configurations are a seating configuration and a sleeping configuration.
  • the legrest 20 and the backrest 18 are both in predetermined positions in which they are substantially vertical and define an angle of 90 ° with the plane of the seat.
  • the footrest 22 is retracted inside the legrest 20.
  • the legrest 20 and the backrest 18 are in predetermined positions in which they extend the seat 16 and thus extend substantially in the plane thereof.
  • the footrest 22 is in its extended position.
  • the unit 28 includes a source 34 for supplying the actuators.
  • the latter is formed for example of a transformer connected to the general power supply network of the aircraft by suitable connection means.
  • a power interface 36 is provided for each actuator,
  • the power interfaces 36, 38 and 39 are controlled by an information processing unit 40.
  • This unit 40 is connected to the control keyboard 32, in order to collect the passenger's control orders. 01 01341
  • the information processing unit 40 comprises for example a microprocessor making it possible to implement a suitable program described in the following description.
  • the unit 40 further includes a clock allowing the microprocessor to manage one or more timers allowing a time offset in the triggering of the movement of the different actuators.
  • each actuator 24, 26 and 27 is equipped with one or more position sensors making it possible to detect that the actuator is in a position such that the seat element which it controls reaches a position proper to a predetermined configuration of the seat.
  • These sensors are connected to the information processing unit 40.
  • the unit 40 is informed when one of the actuators is in a position such that the element which it controls is in the position which it must occupy in the desired predetermined configuration.
  • These sensors are formed for example by potentiometers or micro-contacts installed between the fixed and mobile parts of the actuators.
  • the information processing unit 40 implements a program known per se adapted to control the supply interfaces 36, 38 and 39 so that these supply the actuators 24, 26 and 27 in one direction or the other by reversing the current direction, as a function of the information received from the unit 40.
  • FIG. 2 is shown the algorithm of the routine implemented by the information processing unit 40 in order to bring the seat into its sleeping configuration.
  • a first test step is implemented in step 101 to finish if a problem is detected on the legrest or more precisely on the actuator 24 controlling the legrest.
  • This " problem can be, for example, a malfunction of the actuator potentiometer providing an outlier or any other type of problem that can be detected by the information processing unit 40. If no problem is detected, the actuator 24 controlling the legrest is immediately turned on in step 102. If a problem is detected, step 102 is omitted.
  • a test is then performed in step 104 to verify that the button controlling the sleeping position is still depressed by the passenger. It is also verified in step 105 that no problem on the legrest is detected. If one or other of these conditions is not satisfied, the actuator 24 of the legrest is stopped in step 106. As long as the control for bringing the seat to its sleeping configuration is maintained by the passenger, the information processing unit 40 scans the sensor installed on the actuator 24 of the legrest in step 108 to determine whether or not the legrest is in the target position it occupies relative to to the seat when the seat is in its sleeping configuration. As long as this position is not reached, the tests of steps 104, 105 and 108 are carried out. When the legrest is brought into its target position, the stopping of the legrest is controlled in step 106.
  • a time delay is triggered in step 110.
  • This time delay has a predetermined duration denoted T1. This duration is fixed experimentally depending on the nature and structure of the seat. It is for example equal to one second. It is then verified in step 112 that the control of the sleeping position is always maintained on the keyboard 32. If this is not the case, the actuator 24 controlling the legrest is stopped in step 114 if it was already in motion.
  • step 16 if the control of the sleeping configuration is still maintained by the passenger, it is checked in step 16 that the timer initiated in step 110 has not expired. If it has not expired, the information processing unit 40 determines in step 118 if the actuator 24 is stopped, either that the legrest 24 has reached its sleeping target position, or that a problem was detected in either of steps 101 and 105. If this is not the case, the tests in steps 112 and 116 are again implemented.
  • step 116 the unit 40 finds that the time-out has expired or if in step 118, it is noted that the actuator 24 is stopped, the starting of the actuator 26 controlling the footrest is triggered in step 120. In this second case, the actuator 26 is started before the expiration of the time delay T1.
  • step 120 of setting the footrest 22 in motion it is checked in step 122 that the command of the sleeping configuration is still valid. If this is not the case, the actuator 26 controlling the footrest is stopped in step 114. If this is the case, the information processing unit 40 checks in step 124 the state of the actuator position sensor 26 controlling the footrest in order to check whether the footrest 22 occupies or not its target position specific to the sleeping configuration of the seat. If this is the case, the stopping of the actuator 26 controlling the footrest is controlled in step 114. As long as the sleeping configuration command is still validated, and the footrest is not in its target position, steps 122 and 124 are implemented.
  • FIG. 3 is shown schematically the combined movement of the legrest 20 and the footrest 22 during the implementation of the algorithm of FIG. 2.
  • the time t is given on the abscissa while the amplitude A of displacement of the actuators is given on the ordinate.
  • the legrest displacement curve is designated by C 20 and the legrest displacement curve is designated by C 2 2. It can be seen that the implementation of the algorithm causes the legrest to start immediately at 'instant 0. If the legrest 20 is initially very far from its target position defined for the predetermined configuration chosen, the movement of the legrest takes place for a duration greater than the time period T1 defined by the time delay. Thus, the legrest 20 does not reach its target position until an instant T2 subsequent to T1, so that the condition of step 108 authorizes the stopping of the actuator 24 of the legrest in step 106 is only checked after the time delay initiated in step 110 has expired. Thus, the test carried out in step 116 is checked at time T1, so that the actuator 26 for setting in motion of the footrest is triggered only at time T1, the latter being kept stationary during the initial phase of operation of the legrest.
  • the duration T1 of the time delay is determined, so that when the legrest is initially in its extreme position, that is to say its folded position, and the movement of the seat towards its sleeping configuration is controlled, then the delay T1 is sufficient to ensure that the footrest does not touch the ground during the simultaneous movement of the legrest. and of the footrest, even if the speed of movement of the footrest is much higher than the speed of movement of the legrest.
  • Figure 4 is illustrated, on a graph identical to that of Figure 3, the movement of the footrest and the legrest when the seat is brought into its sleeping configuration while the legrest is initially in a position very close to its extended position.
  • the implementation of the algorithm of FIG. 2 first causes the legrest to start, which moves to its extended position which it reaches at an instant T3 prior to the expiration time T1 of the timer triggered in step 110.
  • the condition of step 118 is satisfied before the expiration of the timer checked in step 116.
  • the actuator 24 controlling the legrest stops the actuator 26 controlling the footrest is triggered to bring the footrest to its extended position.
  • the movements of the actuators 24 and 26 are also synchronized by implementing a predetermined delay between their starting instants in order to prevent the footrest from striking floor.
  • the actuator 26 controlling the footrest is first triggered to retract the " footrest, then only after the expiration of a time delay, the actuator 24 controlling the legrest is triggered to fold down If the footrest reaches its retracted position and therefore the actuator controlling it stops working before the expiration of the timer, then the actuator 24 is triggered immediately before the expiration of the timer.
  • the kinematics management method described here can also be implemented for the joint control of only two seat elements, without this control being intended to bring the seat elements to a predetermined configuration.
  • one of the buttons on the keyboard may be intended to move the legrest and the footrest, at least partially simultaneously, this button, when pressed, causing the movement of both the legrest and from the footrest to their extreme position with, in accordance with the invention, an offset in the instants of starting of the actuators. In this case, the movement of the actuators does not stop until they reach their extreme position, or when the control button is released by the user.

Landscapes

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

Abstract

The invention concerns a method for managing the control system of a seat (10) comprising at least three elements (16, 20, 22) mobile relative to one another and at least two actuators (24, 26) for moving the three elements (16, 20, 22). The method comprises a step which consists in jointly controlling the two actuators (24, 26) to modify the seat configuration. The joint control step comprises the following successive steps: activating a first actuator (24) at a first time, and activating a second actuator (16) at a second time subsequent to said first time and separated from the first time by a predetermined time interval.

Description

"Procédé άe gestion de la cinématique d'un siège à positions préprogrammees et siège le mettant en oeuyre . "Process άe management of the kinematics of a seat with preprogrammed positions and seat using it.
La présente invention concerne un procédé de gestion de la cinématique d'un siège comportant au moins trois éléments de siège mobiles les uns par rapport aux autres et au moins deux actionneurs pour le déplacement des trois éléments les uns par rapport aux autres, le procédé compor- tant une étape de commande conjointe des deux actionneurs pour modifier la configuration du siège.The present invention relates to a method for managing the kinematics of a seat comprising at least three movable seat elements with respect to each other and at least two actuators for moving the three elements with respect to each other, the method comprises - both a step of joint control of the two actuators to modify the configuration of the seat.
Un tel siège est utilisé notamment dans les avions de transport de passagers.Such a seat is used in particular in passenger transport aircraft.
Afin d'améliorer le confort des passagers, de nombreux sièges sont munis de dispositifs électriques d'actionnement permettant de modifier la configuration du siège par déplacement d'éléments mobiles de celui-ci.In order to improve passenger comfort, many seats are fitted with electric actuation devices which allow the configuration of the seat to be modified by moving its mobile elements.
Il est courant que chaque siège comporte un dossier inclinable articulé à une extrémité d'une assise, ainsi qu'un repose-jambes articulé à l'autre extrémité de l'assise. Le dossier et le repose-jambes sont tous deux déplaçables, sous la commande d'un actionneur électrique propre, entre une position sensiblement verticale et position sensiblement horizontale permettant ainsi au siège de prendre plusieurs configurations.It is common for each seat to have a reclining backrest hinged at one end of a seat, as well as a legrest hinged at the other end of the seat. The backrest and the legrest are both movable, under the control of a clean electric actuator, between a substantially vertical position and substantially horizontal position thus allowing the seat to take several configurations.
En outre, afin d'augmenter la longueur du repose-jambes, il est connu d'associer à celui-ci un repose-pieds déplaçable à coulissement par rap- port au repose-jambes, ce repose-pieds étant commandé également par un actionneur électrique pour son déplacement par rapport au repose-jambes entre une position escamotée et une position étendue.In addition, in order to increase the length of the legrest, it is known to associate therewith a movable footrest sliding with respect to the legrest, this footrest also being controlled by an actuator electric for its movement relative to the legrest between a retracted position and an extended position.
Le siège comporte avantageusement des dispositifs permettant, par une commande unique, de provoquer le déplacement du repose-jambes, du repose-pieds et éventuellement du dossier et ce, afin d'amener le siège, par cette commande unique, dans une configuration prédéterminée dans laquelle chaque élément de siège a une position prédéterminée propre à la configuration considérée.The seat advantageously comprises devices making it possible, by a single command, to cause the movement of the legrest, the footrest and possibly the backrest, in order to bring the seat, by this single command, into a predetermined configuration in which each seat element has a predetermined position specific to the configuration considered.
Par exemple, parmi ces configurations sont prévues une configura- tion de couchage dans laquelle le dossier et le repose-jambes sont tous deux horizontaux, le repose-pieds étant étendu et une configuration d'assise dans laquelle le dossier et le repose-jambes sont tous deux sensiblement verticaux, le repose-pieds étant alors dans sa position escamotée. En outre, chacun des actionneurs associés aux différentes parties mobiles du siège peut être commandé indépendamment des autres, de sorte que le siège peut être amené par le passager dans de multiples configurations différentes des configurations prédéterminées. Lorsque le passager appuie sur une commande permettant au siège de revenir dans une configuration prédéterminée telle que la position de couchage ou la position d'assise, les actionneurs sont mis en route successivement afin de déplacer les uns après les autres les éléments du siège vers leur position cible. La mise en route de l'un des actionneurs est déter- minée par la fin de la phase de fonctionnement d'un autre actionneur. Ainsi, à chaque instant, seul un actionneur est en mouvement.For example, among these configurations are provided a sleeping configuration in which the backrest and the legrest are both horizontal, the footrest being extended and a seating configuration in which the backrest and the legrest are both substantially vertical, the footrest then being in its retracted position. In addition, each of the actuators associated with the different moving parts of the seat can be controlled independently of the others, so that the seat can be brought by the passenger in multiple configurations different from the predetermined configurations. When the passenger presses a command allowing the seat to return to a predetermined configuration such as the sleeping position or the sitting position, the actuators are started in succession in order to move the elements of the seat one after the other towards their target position. The start-up of one of the actuators is determined by the end of the operating phase of another actuator. Thus, at each instant, only one actuator is in motion.
On conçoit que le fonctionnement successif des différents actionneurs, rend relativement long le passage du siège vers la configuration prédéterminée choisie. 11 a été envisagé de faire fonctionner simultanément tous les actionneurs. Toutefois, dans ce cas, on constate qu'en fonction des vitesses propres à chaque actionneur, certaines parties du siège peuvent heurter des éléments présents dans l'environnement immédiat du siège, tels qu'un siège voisin, ou encore le sol de l'avion. De plus, certaines configurations intermé- diaires du siège lors de son passage vers la configuration cible peuvent être extrêmement inconfortables pour le passager.It will be appreciated that the successive operation of the various actuators makes the passage from the seat to the chosen predetermined configuration relatively long. It has been envisaged to operate all the actuators simultaneously. However, in this case, it can be seen that, depending on the speeds specific to each actuator, certain parts of the seat may collide with elements present in the immediate environment of the seat, such as a neighboring seat, or else the floor of the plane. In addition, certain intermediate configurations of the seat during its passage to the target configuration can be extremely uncomfortable for the passenger.
L'invention a pour but de proposer un siège de véhicule, et un procédé de gestion de sa cinématique permettant que le siège soit amené dans des configurations prédéterminées aussi rapidement que possible, sans toutefois que des configurations intermédiaires indésirables ne soient prises par le siège lors de son passage vers la configuration prédéterminée.The object of the invention is to propose a vehicle seat, and a method for managing its kinematics allowing the seat to be brought into predetermined configurations as quickly as possible, without, however, undesirable intermediate configurations being taken up by the seat during from its passage to the predetermined configuration.
A cet effet, l'invention a pour objet un procédé de gestion de la cinématique d'un siège du type précité, caractérisé en ce que ladite étape de commande conjointe comporte les étapes successives suivantes : - la mise en action d'un premier actionneur à un premier instant ; etTo this end, the subject of the invention is a method for managing the kinematics of a seat of the aforementioned type, characterized in that said joint control step comprises the following successive steps: - the actuation of a first actuator at a first instant; and
- la mise en action d'un second actionneur à un second instant postérieur audit premier instant et séparé du premier instant d'un intervalle de temps prédéterminé. Selon des modes particuliers de mise en œuvre, le procédé comporte l'une ou plusieurs des caractéristiques suivantes :- the actuation of a second actuator at a second instant after said first instant and separated from the first instant by a predetermined time interval. According to particular modes of implementation, the method includes one or more of the following characteristics:
- il comporte une étape de détection de l'arrêt du premier actionneur pendant ledit intervalle de temps prédéterminé et une étape de mise en ac- tion du second actionneur dès que l'arrêt du premier actionneur est détecté ;- It includes a step of detecting the stop of the first actuator during said predetermined time interval and a step of activating the second actuator as soon as the stop of the first actuator is detected;
- ladite étape de commande conjointe des deux actionneurs est une étape d'amenée du siège dans une configuration prédéterminée, dans laquelle deux des éléments mobiles sont dans des positions prédéterminées propres à ladite configuration prédéterminée ; - l'étape de détection de l'arrêt du premier actionneur comporte une étape de détection de l'atteinte par l'élément de siège commandé par le premier actionneur de sa position prédéterminée ;- Said step of jointly controlling the two actuators is a step of bringing the seat into a predetermined configuration, in which two of the mobile elements are in predetermined positions specific to said predetermined configuration; the step of detecting the stopping of the first actuator includes a step of detecting that the seat element controlled by the first actuator has reached its predetermined position;
- le siège comporte une assise, un repose-jambes articulé par rapport à l'assise entre une position rabattue et une position étendue, un repose- pieds mobile par rapport au repose-jambes entre une position escamotée et une position étendue,, et deux actionneurs disposés, pour l'un, entre l'assise et le repose-jambes et, pour l'autre, entre le repose-jambes et le repose- pieds, la phase de commande conjointe des deux actionneurs étant adaptée pour déplacer le repose-jambes vers sa position étendue et le repose-pieds vers sa position étendue, et le premier actionneur déclenché audit premier instant est l'actionneur disposé entre l'assise et le repose-jambes et le second actionneur déclenché audit second instant postérieur au premier instant est l'actionneur disposé entre le repose-jambes et le repose-pieds ;- the seat comprises a seat, a leg rest articulated relative to the seat between a folded position and an extended position, a footrest movable relative to the leg rest between a retracted position and an extended position, and two actuators arranged, for one, between the seat and the legrest and, for the other, between the legrest and the footrest, the joint control phase of the two actuators being adapted to move the legs to its extended position and the footrest to its extended position, and the first actuator triggered at said first instant is the actuator disposed between the seat and the legrest and the second actuator triggered at said second instant after the first instant is the actuator arranged between the legrest and the footrest;
- le siège comporte une assise, un repose-jambes articulé par rapport à l'assise entre une position rabattue et une position étendue, un repose- pieds mobile par rapport au repose-jambes entre une position escamotée et une position étendue, et deux actionneurs disposés, pour l'un, entre l'assise et le repose-jambes et, pour l'autre, entre le repose-jambes et le repose- pieds, la phase de commande conjointe des deux actionneurs étant adaptée pour déplacer le repose-jambes vers sa position rabattue et le repose-pieds vers sa position escamotée, et que le premier actionneur déclenché audit premier instant est l'actionneur disposé entre le repose-jambes et le repose- pieds et le second actionneur déclenché audit second instant postérieur au premier instant est l'actionneur disposé entre l'assise et le repose-jambes ; et- the seat comprises a seat, a leg rest articulated relative to the seat between a folded position and an extended position, a footrest movable relative to the leg rest between a retracted position and an extended position, and two actuators arranged, for one, between the seat and the legrest and, for the other, between the legrest and the footrest, the joint control phase of the two actuators being adapted to move the legrest towards its folded position and the footrest towards its retracted position, and that the first actuator triggered at said first instant is the actuator disposed between the legrest and the footrest and the second actuator triggered at said second instant after first instant is the actuator arranged between the seat and the legrest; and
- ledit intervalle de temps prédéterminé séparant les premier et second instants est fixé pour assurer que le repose-pieds ne heurte pas le sol au-dessus duquel est installé le siège lors de la modification de la configuration du siège.- Said predetermined time interval separating the first and second instants is fixed to ensure that the footrest does not strike the ground above which the seat is installed when the configuration of the seat is modified.
L'invention a également pour objet un siège de véhicule comportant au moins trois éléments de siège mobiles les uns par rapport aux autres, au moins deux actionneurs pour le déplacement des trois éléments les uns par rapport aux autres, et des moyens de commande conjointe des deux actionneurs pour modifier la configuration du siège, caractérisé en ce que lesdits moyens de commande conjointe comportent :The invention also relates to a vehicle seat comprising at least three movable seat elements with respect to each other, at least two actuators for the displacement of the three elements with respect to each other, and means for jointly controlling the two actuators for modifying the configuration of the seat, characterized in that said joint control means comprise:
- des moyens de mise en action d'un premier actionneur à un premier instant ; et - des moyens de mise en action d'un second actionneur à un second instant postérieur audifpremier instant et séparé du premier instant d'un intervalle de temps prédéterminé.- means for actuating a first actuator at a first instant; and - means for actuating a second actuator at a second posterior instant audifpremier instant and separated from the first instant by a predetermined time interval.
De préférence, lesdits moyens de commande conjointe comportent des moyens de détection de l'arrêt du premier actionneur pendant ledit inter- valle de temps prédéterminé et des moyens de mise en action du second actionneur dès que l'arrêt du premier actionneur est détecté.Preferably, said joint control means comprise means for detecting the stopping of the first actuator during said interval of predetermined time and means for actuating the second actuator as soon as the stopping of the first actuator is detected.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins sur lesquels : - la figure 1 est une vue schématique d'un siège de véhicule selon l'invention ;The invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the drawings in which: - Figure 1 is a schematic view of a vehicle seat according to invention;
- la figure 2 est un organigramme explicitant le fonctionnement du siège par mise en oeuvre d'un procédé de gestion de sa cinématique selon l'invention ; et - les figures 3 et 4 sont des courbes illustrant le mouvement de deux actionneurs du siège en fonction du temps lors de la mise en oeuvre du procédé de gestion de la cinématique du siège selon l'invention. Le siège 10 représenté sur la figure 1 est un siège de passager d'un avion. Ce siège est fixé sur le sol 12 de l'avion.- Figure 2 is a flowchart explaining the operation of the seat by implementing a method of managing its kinematics according to the invention; and - Figures 3 and 4 are curves illustrating the movement of two seat actuators as a function of time during the implementation of the process for managing the kinematics of the seat according to the invention. The seat 10 shown in Figure 1 is a passenger seat of an aircraft. This seat is fixed to the ground 12 of the aircraft.
Le siège 10 comporte un piétement 14 solidaire du sol.12 sur lequel repose une assise 16 sensiblement horizontale. A une extrémité de l'assise est articulé un dossier 18 déplaçable entre une position relevée sensiblement verticale et une position rabattue sensiblement horizontale.The seat 10 has a base 14 secured to the ground.12 on which rests a substantially horizontal seat 16. At one end of the seat is articulated a backrest 18 movable between a substantially vertical raised position and a substantially horizontal folded position.
A l'autre extrémité de l'assise 16, est articulé un repose-jambes 20 déplaçable entre une position rabattue sensiblement verticale en-dessous de l'assise 16 et une position étendue sensiblement horizontale dans le prolongement de l'assise 16.At the other end of the seat 16, there is articulated a leg rest 20 movable between a substantially vertical folded position below the seat 16 and a substantially horizontal extended position in the extension of the seat 16.
Le siège 10 comporte en outre un repose-pieds 22 monté déplaçable à coulissement par rapport au repose-jambes 20 dans le prolongement de celui-ci.The seat 10 further comprises a footrest 22 mounted movable to slide relative to the legrest 20 in the extension thereof.
Le repose-pieds 22 est déplaçable entre une position escamotée à l'intérieur du repose-jambes 20 et une position étendue dans laquelle il prolonge celui-ci et est pratiquement totalement sorti.The footrest 22 is movable between a retracted position inside the legrest 20 and an extended position in which it extends the latter and is almost completely extended.
Un premier actionneur électrique 24 est monté entre l'assise 16 et le repose-jambes 20 afin d'assurer un déplacement de ce dernier entre sa position rabattue et sa position étendue. De même, un deuxième actionneur 26 est prévu entre le repose- jambes 20 et le repose-pieds 22 afin d'assurer le déplacement du repose- pieds entre sa position escamotée et sa position étendue.A first electric actuator 24 is mounted between the seat 16 and the leg rest 20 in order to ensure movement of the latter between its folded position and its extended position. Likewise, a second actuator 26 is provided between the legrest 20 and the footrest 22 in order to ensure the movement of the footrest between its retracted position and its extended position.
Un troisième actionneur 27 est monté entre l'assise 16 et le dossier 18 afin d'assurer le déplacement du dossier entre sa position relevée et sa position rabattue.A third actuator 27 is mounted between the seat 16 and the backrest 18 in order to ensure the movement of the backrest between its raised position and its folded position.
Les trois actionneurs fonctionnent à des vitesses constantes qui peuvent être différentes d'un actionneur à l'autre.The three actuators operate at constant speeds which may be different from one actuator to another.
Chacun des trois actionneurs 24, 26 et 27 est alimenté en courant électrique depuis une unité centrale de pilotage 28. Cette unité de pilotage est reliée séparément à chacun des actionneurs 24, 26 et 27 afin d'assurer leur pilotage indépendant. En outre, le siège comporte un accoudoir 30, sur lequel est fixé un clavier de commande 32 permettant la commande indépendante des actionneurs 24, 26 et 27 afin de provoquer leur déplacement.Each of the three actuators 24, 26 and 27 is supplied with electric current from a central control unit 28. This control unit is connected separately to each of the actuators 24, 26 and 27 in order to ensure their independent control. In addition, the seat includes an armrest 30, on which is fixed a control keyboard 32 allowing independent control of the actuators 24, 26 and 27 in order to cause their displacement.
Le clavier 32 comporte également des touches permettant au pas- sager d'atteindre, par une commande unique agissant sur plusieurs actionneurs, une de deux configurations prédéterminées. Le nombre de configurations prédéterminées du siège peut être réduit à un ou être supérieur à deux.The keyboard 32 also includes keys allowing the passenger to reach, by a single command acting on several actuators, one of two predetermined configurations. The number of predetermined seat configurations can be reduced to one or more than two.
Dans l'exemple- considéré, le clavier 32 comporte deux boutons cha- cun associé à une configuration prédéterminée. Ces configurations sont une configuration d'assise et une configuration de couchage.In the example considered, the keyboard 32 has two buttons each associated with a predetermined configuration. These configurations are a seating configuration and a sleeping configuration.
Dans la configuration d'assise, le repose-jambes 20 et le dossier 18 se trouvent tous deux dans des positions prédéterminées dans les lesquelles ils sont sensiblement verticaux et définissent un angle de 90° avec le plan de l'assise. Dans cette configuration d'assise, le repose-pieds 22 est escamoté à l'intérieur du repose-jambes 20.In the seat configuration, the legrest 20 and the backrest 18 are both in predetermined positions in which they are substantially vertical and define an angle of 90 ° with the plane of the seat. In this seating configuration, the footrest 22 is retracted inside the legrest 20.
Dans la configuration de couchage, le repose-jambes 20 et le dossier 18 sont dans des positions prédéterminées dans les lesquelles ils prolongent l'assise 16 et s'étendent ainsi sensiblement dans le plan de celle-ci. Dans cette configuration de couchage, le repose-pieds 22 est dans sa position étendue.In the sleeping configuration, the legrest 20 and the backrest 18 are in predetermined positions in which they extend the seat 16 and thus extend substantially in the plane thereof. In this sleeping configuration, the footrest 22 is in its extended position.
L'unité 28 comporte une source 34 d'alimentation des actionneurs. Cette dernière est formée par exemple d'un transformateur relié au réseau d'alimentation électrique générale de l'avion par des moyens de connexion adaptés.The unit 28 includes a source 34 for supplying the actuators. The latter is formed for example of a transformer connected to the general power supply network of the aircraft by suitable connection means.
Pour chaque actionneur est prévue une interface d'alimentation 36,A power interface 36 is provided for each actuator,
38 et 39 assurant l'alimentation des actionneurs, respectivement 24, 26 et38 and 39 ensuring the supply of the actuators, respectively 24, 26 and
27, à partir de la source d'alimentation 34. Ces interfaces assurent la mise en forme du courant d'alimentation des actionneurs en fonction du sens d'actionnement souhaité.27, from the power source 34. These interfaces provide the shaping of the actuator supply current as a function of the desired direction of actuation.
Les interfaces d'alimentation 36, 38 et 39 sont pilotées par une unité de traitement d'informations 40. Cette unité 40 est reliée au clavier de commande 32, afin de recueillir les ordres de commande du passager. 01 01341The power interfaces 36, 38 and 39 are controlled by an information processing unit 40. This unit 40 is connected to the control keyboard 32, in order to collect the passenger's control orders. 01 01341
77
L'unité de traitement d'informations 40 comporte par exemple un microprocesseur permettant de mettre en œuvre un programme adapté décrit dans la suite de la description.The information processing unit 40 comprises for example a microprocessor making it possible to implement a suitable program described in the following description.
L'unité 40 comporte en outre une horloge permettant au micropro- cesseur de gérer une ou plusieurs temporisations permettant un décalage temporel dans le déclenchement du mouvement des différents actionneurs.The unit 40 further includes a clock allowing the microprocessor to manage one or more timers allowing a time offset in the triggering of the movement of the different actuators.
Enfin, chaque actionneur 24, 26 et 27 est équipé d'un ou plusieurs capteurs de position permettant de détecter que l'actionneur est dans une position telle que l'élément de siège qu'il commande atteint une position propre à une configuration prédéterminée du siège.Finally, each actuator 24, 26 and 27 is equipped with one or more position sensors making it possible to detect that the actuator is in a position such that the seat element which it controls reaches a position proper to a predetermined configuration of the seat.
Ces capteurs, désignés par la référence 44, 46 et 47 respectivement pour les actionneurs 24, 26 et 27, sont reliés à l'unité de traitement d'informations 40. Ainsi, l'unité 40 est informée lorsque l'un des actionneurs est dans une position telle que l'élément qu'il commande se trouve dans la position qu'il doit occuper dans la configuration prédéterminée souhaitée.These sensors, designated by the reference 44, 46 and 47 respectively for the actuators 24, 26 and 27, are connected to the information processing unit 40. Thus, the unit 40 is informed when one of the actuators is in a position such that the element which it controls is in the position which it must occupy in the desired predetermined configuration.
Ces capteurs sont formés par exemple par des potentiomètres ou des micro-contacts implantés entre les parties fixes et mobiles des actionneurs.These sensors are formed for example by potentiometers or micro-contacts installed between the fixed and mobile parts of the actuators.
Pour le fonctionnement du siège, l'unité de traitement d'informations 40 met en œuvre un programme connu en soi adapté pour commander les interfaces d'alimentation 36, 38 et 39 afin que celles-ci assurent l'alimentation des actionneurs 24, 26 et 27 dans un sens ou dans l'autre par inversion du sens de courant, en fonction des informations reçues depuis l'unité 40.For the operation of the seat, the information processing unit 40 implements a program known per se adapted to control the supply interfaces 36, 38 and 39 so that these supply the actuators 24, 26 and 27 in one direction or the other by reversing the current direction, as a function of the information received from the unit 40.
Sur la figure 2 est représenté l'algorithme de la routine mise en oeu- vre par l'unité de traitement d'informations 40 afin d'amener le siège dans sa configuration de couchage.In FIG. 2 is shown the algorithm of the routine implemented by the information processing unit 40 in order to bring the seat into its sleeping configuration.
Lors de cette modification de la configuration du siège, ie dossier est amené dans sa position rabattue dès l'enfoncement par le passager de la touche de clavier 32 dédiée à cette configuration particulière du siège. Si- multanément, lors de l'enfoncement de cette touche, la routine dont l'algorithme est donné sur la figure 2 est mise en œuvre.During this modification of the configuration of the seat, ie the backrest is brought into its folded position as soon as the passenger presses the keyboard key 32 dedicated to this particular configuration of the seat. At the same time, when this key is pressed, the routine whose algorithm is given in FIG. 2 is implemented.
Ainsi, lors de la détection de l'enfoncement de cette touche à l'étape 100, une première étape de test est mise en œuvre à l'étape 101 pour dé- terminer si un problème est détecté sur le repose-jambes ou plus exactement sur l'actionneur 24 commandant le repose-jambes. Ce" problème peut être par exemple un dysfonctionnement du potentiomètre de l'actionneur fournissant une valeur aberrante ou tout autre type de problème pouvant être détecté par l'unité de traitement d'informations 40. Si aucun problème n'est détecté, l'actionneur 24 commandant le repose-jambes est immédiatement mis en marche à l'étape 102. Si un problème est détecté, l'étape 102 est omise.Thus, upon detection of the pressing of this key in step 100, a first test step is implemented in step 101 to finish if a problem is detected on the legrest or more precisely on the actuator 24 controlling the legrest. This " problem can be, for example, a malfunction of the actuator potentiometer providing an outlier or any other type of problem that can be detected by the information processing unit 40. If no problem is detected, the actuator 24 controlling the legrest is immediately turned on in step 102. If a problem is detected, step 102 is omitted.
Comme illustré dans la branche gauche de l'organigramme, un test est ensuite effectué à l'étape 104 pour vérifier que le bouton commandant la position de couchage est toujours enfoncé par le passager. Il est également vérifié à l'étape 105 qu'aucun problème sur le repose-jambes n'est détecté. Si l'une ou l'autre de ces conditions n'est pas vérifiée, l'actionneur 24 du repose-jambes est arrêté à l'étape 106. Tant que la commande d'amenée du siège dans sa configuration de couchage est maintenue par le passager, l'unité de traitement d'informations 40 scrute le capteur installé sur l'actionneur 24 du repose-jambes à l'étape 108 pour déterminer si le repose- jambes est ou non dans la position cible qu'il occupe par rapport à l'assise lorsque le siège est dans sa configuration de couchage. Tant que cette posi- tion n'est pas atteinte, les tests des étapes 104, 105 et 108 sont mis en œuvre. Lorsque le repose-jambes est amené dans sa position cible, l'arrêt du repose-jambes est commandé à l'étape 106.As illustrated in the left branch of the flowchart, a test is then performed in step 104 to verify that the button controlling the sleeping position is still depressed by the passenger. It is also verified in step 105 that no problem on the legrest is detected. If one or other of these conditions is not satisfied, the actuator 24 of the legrest is stopped in step 106. As long as the control for bringing the seat to its sleeping configuration is maintained by the passenger, the information processing unit 40 scans the sensor installed on the actuator 24 of the legrest in step 108 to determine whether or not the legrest is in the target position it occupies relative to to the seat when the seat is in its sleeping configuration. As long as this position is not reached, the tests of steps 104, 105 and 108 are carried out. When the legrest is brought into its target position, the stopping of the legrest is controlled in step 106.
En outre, et comme illustré sur la branche droite de l'organigramme de la figure 2, immédiatement après le démarrage de l'actionneur assurant le déplacement du repose-jambes à l'étape 102, ou à l'issue de l'étape 101 , si un problème a été détecté, une temporisation est déclenchée à l'étape 110. Cette temporisation a une durée prédéterminée notée T1. Cette durée est fixée expérimentalement en fonction de la nature et de la structure du siège. Elle est par exemple égale à une seconde. II est ensuite vérifié à l'étape 112 que la commande de la position de couchage est toujours maintenue au clavier 32. Si tel n'est pas le cas, l'actionneur 24 commandant le repose-jambes est arrêté à l'étape 114 si celui-ci était déjà en mouvement. Au contraire, si la commande de la configuration de couchage est toujours maintenue par le passager, il est vérifié à l'étape 16 que la temporisation initiée à l'étape 110 n'a pas expiré. Si elle n'a pas expiré, l'unité de traitement d'informations 40 détermine à l'étape 118 si l'actionneur 24 est arrêté, soit que le repose-jambes 24 a atteint sa position cible de couchage, soit qu'un problème a été détecté à i'une ou l'autre des étapes 101 et 105. Si tel n'est pas le cas, les tests des étapes 112 et 116 sont à nouveau mis en œuvre.In addition, and as illustrated on the right branch of the flow diagram of FIG. 2, immediately after the start of the actuator ensuring the movement of the legrest in step 102, or at the end of step 101 , if a problem has been detected, a time delay is triggered in step 110. This time delay has a predetermined duration denoted T1. This duration is fixed experimentally depending on the nature and structure of the seat. It is for example equal to one second. It is then verified in step 112 that the control of the sleeping position is always maintained on the keyboard 32. If this is not the case, the actuator 24 controlling the legrest is stopped in step 114 if it was already in motion. On the contrary, if the control of the sleeping configuration is still maintained by the passenger, it is checked in step 16 that the timer initiated in step 110 has not expired. If it has not expired, the information processing unit 40 determines in step 118 if the actuator 24 is stopped, either that the legrest 24 has reached its sleeping target position, or that a problem was detected in either of steps 101 and 105. If this is not the case, the tests in steps 112 and 116 are again implemented.
Si à l'étape 116, l'unité 40 constate que la temporisation a expiré ou si à l'étape 118, il est constaté que l'actionneur 24 est arrêté, le démarrage de l'actionneur 26 commandant le repose-pieds est déclenché à l'étape 120. Dans ce second cas, l'actionneur 26 est mis en route avant l'expiration de la temporisation T1.If in step 116, the unit 40 finds that the time-out has expired or if in step 118, it is noted that the actuator 24 is stopped, the starting of the actuator 26 controlling the footrest is triggered in step 120. In this second case, the actuator 26 is started before the expiration of the time delay T1.
On comprend que sauf si le repose-jambes est dans sa position ci- ble et donc que l'actionneur le commandant est arrêté avant l'expiration de la temporisation T1, le démarrage de l'actionneur 26 commandant le repose- pieds n'est déclenché qu'avec un retard d'une durée T1 par rapport au démarrage de l'actionneur 24 commandant le repose-jambes.It is understood that unless the legrest is in its target position and therefore the actuator the commander is stopped before the expiration of the time delay T1, the start of the actuator 26 controlling the footrest is not triggered only with a delay of a duration T1 relative to the start of the actuator 24 controlling the legrest.
Après l'étape 120 de mise en mouvement du repose-pieds 22, il est vérifié à l'étape 122 que la commande de la configuration de couchage est toujours valide. Si tel n'est pas le cas, l'actionneur 26 commandant le repose-pieds est arrêté à l'étape 114. Si tel est le cas, l'unité de traitement d'informations 40 vérifie à l'étape 124 l'état du capteur de position de l'actionneur 26 commandant le repose-pieds afin de vérifier si le repose- pieds 22 occupe ou non sa position cible propre à la configuration de couchage du siège. Si tel est le cas, l'arrêt de l'actionneur 26 commandant le repose-pieds est commandé à l'étape 114. Tant que la commande de configuration de couchage est toujours validée, et que le repose-pieds n'est pas dans sa position .cible, les étapes 122 et 124 sont mises en œuvre. Sur la figure 3 est représenté schématiquement le mouvement combiné du repose-jambes 20 et du repose-pieds 22 lors de la mise en œuvre de l'algorithme de la figure 2. Sur cette figure, le temps t est donné en abscisse alors que l'amplitude A de déplacement des actionneurs est donnée en ordonnée. La courbe de déplacement du repose-jambes est désignée par C20 et la courbe de déplacement du repose-pieds est désignée par C22. On constate que la mise en œuvre de l'algorithme provoque un démarrage immédiat du repose-jambes à l'instant 0. Si le repose-jambes 20 est initialement très éloigné de sa position cible définie pour la configuration prédéterminée choisie, le déplacement du repose-jambes s'effectue pendant une durée supérieure à la période de temps T1 définie par la temporisation. Ainsi, le repose-jambes 20 n'atteint sa position cible qu'à un instant T2 ultérieur à T1 , de sorte que la condition de l'étape 108 autorisant l'arrêt de l'actionneur 24 du repose-jambes à l'étape 106 n'est vérifiée qu'après expiration de la temporisation initiée à l'étape 110. Ainsi, le test effectué à l'étape 116 est vérifié à l'instant T1 , de sorte que l'actionneur 26 de mise en mou- vement du repose-pieds est déclenchée seulement à l'instant T1 , ce dernier étant .maintenu à l'arrêt pendant la phase initiale de fonctionnement du re- pose-jambes.After the step 120 of setting the footrest 22 in motion, it is checked in step 122 that the command of the sleeping configuration is still valid. If this is not the case, the actuator 26 controlling the footrest is stopped in step 114. If this is the case, the information processing unit 40 checks in step 124 the state of the actuator position sensor 26 controlling the footrest in order to check whether the footrest 22 occupies or not its target position specific to the sleeping configuration of the seat. If this is the case, the stopping of the actuator 26 controlling the footrest is controlled in step 114. As long as the sleeping configuration command is still validated, and the footrest is not in its target position, steps 122 and 124 are implemented. In FIG. 3 is shown schematically the combined movement of the legrest 20 and the footrest 22 during the implementation of the algorithm of FIG. 2. In this figure, the time t is given on the abscissa while the amplitude A of displacement of the actuators is given on the ordinate. The legrest displacement curve is designated by C 20 and the legrest displacement curve is designated by C 2 2. It can be seen that the implementation of the algorithm causes the legrest to start immediately at 'instant 0. If the legrest 20 is initially very far from its target position defined for the predetermined configuration chosen, the movement of the legrest takes place for a duration greater than the time period T1 defined by the time delay. Thus, the legrest 20 does not reach its target position until an instant T2 subsequent to T1, so that the condition of step 108 authorizes the stopping of the actuator 24 of the legrest in step 106 is only checked after the time delay initiated in step 110 has expired. Thus, the test carried out in step 116 is checked at time T1, so that the actuator 26 for setting in motion of the footrest is triggered only at time T1, the latter being kept stationary during the initial phase of operation of the legrest.
Dans ces conditions, on constate que l'initiation du déplacement du repose-pieds par rapport au repose-jambes est initiée avec un retard T1 par rapport à l'initiation du déplacement du repose-jambes par rapport à l'assise. En imposant un tel retard, on assure que le repose-jambes soit déjà suffisamment relevé pour permettre une sortie du repose-pieds, sans risque que l'extrémité libre de ce dernier ne vienne heurter le sol lors de sa sortie.Under these conditions, it can be seen that the initiation of the movement of the footrest relative to the legrest is initiated with a delay T1 with respect to the initiation of the movement of the legrest relative to the seat. By imposing such a delay, it is ensured that the legrest is already sufficiently raised to allow an exit from the footrest, without risk that the free end of the latter will strike the ground when it comes out.
La durée T1 de la temporisation est déterminée, de telle sorte que lorsque le repose-jambes est initialement dans sa position extrême, c'est-à- dire sa position rabattue, et que le déplacement du siège vers sa configuration de couchage est commandée, alors le retard T1 est suffisant pour assurer que le repose-pieds ne touche pas le sol lors du mouvement simultané du repose-jambes. et du repose-pieds, et ce, même si la vitesse de dépla- cernent du repose-pieds est très supérieure à la vitesse de déplacement du repose-jambes.The duration T1 of the time delay is determined, so that when the legrest is initially in its extreme position, that is to say its folded position, and the movement of the seat towards its sleeping configuration is controlled, then the delay T1 is sufficient to ensure that the footrest does not touch the ground during the simultaneous movement of the legrest. and of the footrest, even if the speed of movement of the footrest is much higher than the speed of movement of the legrest.
Sur la figure 4 est illustré, sur un graphique identique à celui de la figure 3, le déplacement du repose-pieds et du repose-jambes lorsque le siège est amené dans sa configuration de couchage aiors que le repose- jambes est initialement dans une position très proche de sa position étendue. Dans ce cas, la mise en oeuvre de l'algorithme de la figure 2 provoque d'abord le démarrage du repose-jambes qui se déplace vers sa position étendue qu'il atteint à un instant T3 antérieur à l'instant T1 d'expiration de la temporisation déclenchée à l'étape 110. Ainsi, la condition de l'étape 118 est satisfaite avant l'expiration de la temporisation vérifiée à l'étape 116. Dès l'arrêt de l'actionneur 24 commandant le repose-jambes, l'actionneur 26 commandant le repose-pieds est déclenché pour amener le repose-pieds jusqu'à sa position étendue.In Figure 4 is illustrated, on a graph identical to that of Figure 3, the movement of the footrest and the legrest when the seat is brought into its sleeping configuration while the legrest is initially in a position very close to its extended position. In this case, the implementation of the algorithm of FIG. 2 first causes the legrest to start, which moves to its extended position which it reaches at an instant T3 prior to the expiration time T1 of the timer triggered in step 110. Thus, the condition of step 118 is satisfied before the expiration of the timer checked in step 116. As soon as the actuator 24 controlling the legrest stops, the actuator 26 controlling the footrest is triggered to bring the footrest to its extended position.
De même, lorsque le siège est amené dans sa configuration d'assise, les mouvements des actionneurs 24 et 26 sont également synchronisés par mise en œuvre d'un retard prédéterminé entre leurs instants de démarrage afin d'éviter que le repose-pieds ne heurte le sol. Dans ce cas, l'actionneur 26 commandant le repose-pieds est d'abord déclenché pour rétracter le" repose-pieds, puis seulement après l'expiration d'une temporisation, l'actionneur 24 commandant le repose-jambes est déclenché pour rabattre le repose-jambes. Si le repose-pieds atteint sa position escamotée et donc que l'actionneur le commandant cesse de fonctionner avant l'expiration de la temporisation, alors l'actionneur 24 est déclenché immédiatement avant l'expiration de la temporisation.Similarly, when the seat is brought into its seating configuration, the movements of the actuators 24 and 26 are also synchronized by implementing a predetermined delay between their starting instants in order to prevent the footrest from striking floor. In this case, the actuator 26 controlling the footrest is first triggered to retract the " footrest, then only after the expiration of a time delay, the actuator 24 controlling the legrest is triggered to fold down If the footrest reaches its retracted position and therefore the actuator controlling it stops working before the expiration of the timer, then the actuator 24 is triggered immediately before the expiration of the timer.
Le procédé, de gestion de cinématique décrit ici peut être également mis en œuvre pour la commande conjointe de deux éléments de siège seulement, sans que cette commande ait pour but d'amener les éléments de siège vers une configuration prédéterminée.The kinematics management method described here can also be implemented for the joint control of only two seat elements, without this control being intended to bring the seat elements to a predetermined configuration.
Ainsi, par exemple, l'un des boutons du clavier peut être destiné au déplacement du repose-jambes et du repose-pieds, au moins partiellement simultanément, ce bouton, quand il est enfoncé, provoquant le déplacement à la fois du repose-jambes et du repose-pieds vers leur position extrême avec, conformément à l'invention, un décalage dans les instants de démarrage des actionneurs. Dans ce cas, le mouvement des actionneurs ne cesse que lorsque ceux-ci atteignent leur position extrême, ou lorsque le bouton de commande est relâché par l'utilisateur. Thus, for example, one of the buttons on the keyboard may be intended to move the legrest and the footrest, at least partially simultaneously, this button, when pressed, causing the movement of both the legrest and from the footrest to their extreme position with, in accordance with the invention, an offset in the instants of starting of the actuators. In this case, the movement of the actuators does not stop until they reach their extreme position, or when the control button is released by the user.

Claims

REVENDICATIONS
1. Procédé de gestion de la cinématique d'un siège (10) comportant au moins trois éléments de siège (16, 20, 22) mobiles les uns par rapport aux autres et au moins deux actionneurs (24, 26) pour le déplacement des trois éléments (16, 20, 22) les uns par rapport aux autres, le procédé comportant une étape de commande conjointe des deux actionneurs (24, 26) pour modifier la configuration, du siège, caractérisé en ce que ladite étape de commande conjointe comporte les étapes successives suivantes :1. Method for managing the kinematics of a seat (10) comprising at least three seat elements (16, 20, 22) movable with respect to each other and at least two actuators (24, 26) for moving the three elements (16, 20, 22) with respect to each other, the method comprising a step of joint control of the two actuators (24, 26) for modifying the configuration , of the seat, characterized in that said step of joint control comprises the following successive stages:
- la mise en action d'un premier actionneur (24) à un premier ins- l tant ; et- the actuation of a first actuator (24) at a first moment; and
- la mise en action d'un second actionneur (26) à un second instant postérieur audit premier instant et séparé du premier instant d'un intervalle de temps prédéterminé.- the actuation of a second actuator (26) at a second instant after said first instant and separated from the first instant by a predetermined time interval.
2. Procédé selon la revendication 1 , caractérisé en ce qu'il comporte une étape de détection de l'arrêt du premier actionneur (24) pendant ledit intervalle de temps prédéterminé et une étape de mise en action du second actionneur (26) dès que l'arrêt du premier actionneur (24) est détecté.2. Method according to claim 1, characterized in that it comprises a step of detecting the stopping of the first actuator (24) during said predetermined time interval and a step of activating the second actuator (26) as soon as the shutdown of the first actuator (24) is detected.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que ladite étape de commande conjointe des deux actionneurs est une étape d'ame- née du siège dans une configuration prédéterminée, dans laquelle deux des éléments mobiles (20, 22) sont dans des positions prédéterminées propres à ladite configuration prédéterminée.3. Method according to claim 1 or 2, characterized in that said step of jointly controlling the two actuators is a step of bringing the seat into a predetermined configuration, in which two of the movable elements (20, 22) are in predetermined positions specific to said predetermined configuration.
4. Procédé selon les revendications 2 et 3 prises ensemble, caractérisé en ce que l'étape de détection de l'arrêt du premier actionneur (24) corn- porte une étape de détection de l'atteinte par l'élément de siège (20) commandé par le premier actionneur (24) de sa position prédéterminée.4. Method according to claims 2 and 3 taken together, characterized in that the step of detecting the stopping of the first actuator (24) includes a step of detecting the attack by the seat element (20 ) controlled by the first actuator (24) from its predetermined position.
5. Procédé selon la revendication 3 ou 4, dans lequel le siège (10) comporte une assise (16), un repose-jambes (20) articulé par rapport à l'assise (16) entre une-position rabattue et une position étendue, un repose- pieds (22) mobile par rapport au repose-jambes (20) entre une position escamotée et une position étendue, et deux actionneurs (24, 26) disposés, pour l'un, entre l'assise (16) et le repose-jambes (20) et, pour l'autre, entre le repose-jambes (20) et le repose-pieds (22), procédé dans lequel la phase de commande conjointe des deux actionneurs (24, 26) est adaptée pour déplacer le repose-jambes (20) vers sa position étendue et le repose-pieds (22) vers sa position étendue, caractérisé en ce que le premier actionneur déclenché audit premier instant est l'actionneur (24) disposé entre l'assise (16) et le repose-jambes (20) et le second actionneur déclenché audit second instant postérieur au premier instant est l'actionneur (26) disposé entre le repose-jambes (20) et le repose-pieds (22).5. Method according to claim 3 or 4, wherein the seat (10) comprises a seat (16), a leg rest (20) articulated relative to the seat (16) between a-folded position and an extended position , a footrest (22) movable relative to the legrest (20) between a retracted position and an extended position, and two actuators (24, 26) arranged, for one, between the seat (16) and the legrest (20) and, for the other, between the legrest (20) and the footrest (22), a process in which the phase of joint control of the two actuators (24, 26) is adapted to move the legrest (20) to its extended position and the footrest (22) to its extended position, characterized in that the first actuator triggered at said first instant is the actuator (24) disposed between the seat (16) and the legrest (20) and the second actuator triggered at said second instant after the first instant is the actuator (26) disposed between the legrest (20) and the footrest (22).
6. Procédé selon la revendication 3 ou 4, dans lequel le siège (10) comporte une assise (16), un repose-jambes (20) articulé par rapport à l'assise (16) entre une position rabattue et une position étendue, un repose- pieds (22) mobile par rapport au repose-jambes (20) entre une position escamotée et une position étendue, et deux actionneurs (24, 26) disposés, pour l'un, entre l'assise (16) et le repose-jambes (20) et, pour l'autre, entre le repose-jambes (20) et le repose-pieds (22), procédé dans lequel la phase de commande conjointe des deux actionneurs (24, 26) est adaptée pour déplacer le repose-jambes (20) vers sa position rabattue et le repose-pieds (22) vers sa position escamotée, caractérisé en ce que le premier actionneur déclenché audit premier instant est l'actionneur (26) disposé entre le repose- jambes (20) et le repose-pieds (22) et le second actionneur déclenché audit second instant postérieur au premier instant est l'actionneur (24) disposé entre l'assise (16) et le repose-jambes (20).6. Method according to claim 3 or 4, in which the seat (10) comprises a seat (16), a leg rest (20) articulated relative to the seat (16) between a folded position and an extended position, a footrest (22) movable relative to the legrest (20) between a retracted position and an extended position, and two actuators (24, 26) arranged, for one, between the seat (16) and the legrest (20) and, for the other, between the legrest (20) and the footrest (22), method in which the joint control phase of the two actuators (24, 26) is adapted to move the legrest (20) to its folded position and the footrest (22) to its retracted position, characterized in that the first actuator triggered at said first instant is the actuator (26) disposed between the legrest (20 ) and the footrest (22) and the second actuator triggered at said second instant after the first instant is the actuator (24) disposed between the 'seat (16) and legrest (20).
7. Procédé selon la revendication 5 ou 6, caractérisé en ce que ledit intervalle de temps prédéterminé séparant les premier et second instants est fixé pour assurer que le repose-pieds (22) ne heurte pas le sol au-dessus duquel est installé le siège lors de la modification de la configuration du siège.7. Method according to claim 5 or 6, characterized in that said predetermined time interval separating the first and second instants is fixed to ensure that the footrest (22) does not strike the ground above which the seat is installed when changing the seat configuration.
8. Siège (10) comportant au moins trois éléments de siège (16, 20, 22) mobiles les uns par rapport aux autres, au moins deux actionneurs (24, 26) pour le déplacement des trois éléments (16, 20, 22) les uns par rapport aux autres, et des moyens (28, 32) de commande conjointe des deux actionneurs (24, 26) pour modifier la configuration du siège, caractérisé en ce que lesdits moyens (28, 32) de commande conjointe comportent : 01 013418. Seat (10) comprising at least three seat elements (16, 20, 22) movable with respect to each other, at least two actuators (24, 26) for the movement of the three elements (16, 20, 22) relative to each other, and means (28, 32) of joint control of the two actuators (24, 26) for modifying the configuration of the seat, characterized in that said means (28, 32) of joint control comprise: 01 01341
1414
- des moyens de mise en action d'un premier actionneur (24) à un premier instant ; et- Means for actuating a first actuator (24) at a first instant; and
- des moyens de mise en action d'un second actionneur (26) à un second instant postérieur audit premier instant et séparé du premier instant d'un intervalle de temps prédéterminé.- Means for actuating a second actuator (26) at a second instant after said first instant and separated from the first instant by a predetermined time interval.
9. Siège selon la revendication 8, caractérisé en ce que lesdits moyens de commande conjointe comportent des moyens (44, 46) de détection de l'arrêt du premier actionneur (24) pendant ledit intervalle de temps prédéterminé et des moyens (28) de mise en action du second actionneur (26) dès que l'arrêt du premier actionneur (24) est détecté. 9. Seat according to claim 8, characterized in that said joint control means comprise means (44, 46) for detecting the stopping of the first actuator (24) during said predetermined time interval and means (28) for actuation of the second actuator (26) as soon as the stopping of the first actuator (24) is detected.
EP01931774A 2000-05-04 2001-05-02 Method for managing the control system of a seat with pre-programmed positions and seat therefor Expired - Lifetime EP1191862B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0005734A FR2808433B1 (en) 2000-05-04 2000-05-04 METHOD FOR MANAGING THE KINEMATICS OF A SEAT WITH PRE-PROGRAMMED POSITIONS AND SEAT USING THE SAME
FR0005734 2000-05-04
PCT/FR2001/001341 WO2001082751A1 (en) 2000-05-04 2001-05-02 Method for managing the control system of a seat with pre-programmed positions and seat therefor

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EP1191862A1 true EP1191862A1 (en) 2002-04-03
EP1191862B1 EP1191862B1 (en) 2008-02-20

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EP (1) EP1191862B1 (en)
AU (1) AU5847701A (en)
DE (1) DE60132862T2 (en)
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WO (1) WO2001082751A1 (en)

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DE60132862D1 (en) 2008-04-03
DE60132862T2 (en) 2009-03-05
EP1191862B1 (en) 2008-02-20
US6874855B2 (en) 2005-04-05
WO2001082751A1 (en) 2001-11-08
AU5847701A (en) 2001-11-12
FR2808433B1 (en) 2002-08-02
FR2808433A1 (en) 2001-11-09
US20030071504A1 (en) 2003-04-17

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