WO2014080115A1 - Motor vehicle seat adjustment mechanism - Google Patents

Motor vehicle seat adjustment mechanism Download PDF

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Publication number
WO2014080115A1
WO2014080115A1 PCT/FR2013/052774 FR2013052774W WO2014080115A1 WO 2014080115 A1 WO2014080115 A1 WO 2014080115A1 FR 2013052774 W FR2013052774 W FR 2013052774W WO 2014080115 A1 WO2014080115 A1 WO 2014080115A1
Authority
WO
WIPO (PCT)
Prior art keywords
toothed
adjustment mechanism
locking
locking system
members
Prior art date
Application number
PCT/FR2013/052774
Other languages
French (fr)
Inventor
Olivier Kircher
Stéphane THULEAU
Original Assignee
Faurecia Sièges d'Automobile
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 Faurecia Sièges d'Automobile filed Critical Faurecia Sièges d'Automobile
Publication of WO2014080115A1 publication Critical patent/WO2014080115A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/225—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms
    • B60N2/2252—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. one gear without sun gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/225—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms
    • B60N2/2254—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms provided with braking systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/236—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls linearly movable

Definitions

  • the present invention relates to mechanisms for adjusting motor vehicle seats.
  • a motor vehicle seat adjustment mechanism comprising:
  • a second element connectable to a seat component, and movable relative to the first element in one direction
  • a locking system which can take alternately an active state, in which it prohibits a relative displacement of the first and second elements according to the direction, and an inactive state, in which it authorizes said relative displacement
  • the locking system comprises at least first and second tooth sectors of one of the first and second members
  • the locking system also comprises at least one first and second toothed members carried by the other of the first and second members, and movable relative thereto.
  • Document FR 2,743,764 describes an example of such a setting mechanism, in this case a two-stage articulation.
  • a first stage is used for occupant tilt comfort adjustment.
  • a second stage comprising the locking system described above, is used to tilt the backrest forward, for example to facilitate access to the rear seats.
  • the present invention is intended in particular to allow a rotation range greater than 120 ° without this additional part.
  • a mechanism of the kind in question is characterized in that the toothed sectors have respective profiles that are different from each other, and the toothed members have respective toothed profiles that are different from each other, the profile tooth of each toothed member being associated with a single profile among the profiles of the toothed sectors.
  • each toothed profile of the toothed members comprises a series of teeth and a boss arranged in series along an extension direction, and the bosses of different toothed members are arranged at different locations according to the toothed member;
  • At least one toothed member has a boss which interrupts the series of teeth
  • At least one toothed member has a boss located at one end of the series of teeth
  • the first element comprises a 360 ° continuous peripheral track comprising the circumferential toothed sectors
  • a user actuable control system adapted to alternately place the locking system in its active or inactive state
  • the adjusting mechanism further comprising:
  • the intermediate element being movable relative to the third element in the direction
  • a second locking system that can take alternately an active state, in which it prohibits a relative displacement of the third element and the intermediate element in the direction, and an inactive state, in which it allows said relative movement, the locking step the second locking system is less than the locking pitch of the first locking system;
  • the second locking system is a continuous system
  • the second locking system is discontinuous system.
  • FIG. 1 is a schematic side view of a vehicle seat
  • FIG. 2 is an exploded perspective view of an adjustment mechanism at a first stage according to one embodiment
  • FIG 2a is a plan view of locking members in locked position
  • FIG 2b is a plan view, oriented as in FIG 2a, of a ring of a locking flange
  • FIG 3 is a plan view of the adjustment mechanism in a position of access to the rear seats
  • FIG 4 is a plane view after rotation of 120 ° of the mobile flange
  • FIG 5 is a view similar to Figure 2 at a second stage of the adjustment mechanism
  • FIG 6 is a sectional view along the axis VI - VI in Figure 5.
  • FIG. 1 schematically represents a seat 10 of a motor vehicle comprising a backrest 11 rotatably mounted, for example around a seat 12.
  • the rotation of the backrest 11 relative to the seat 12 is around a transverse axis X
  • the seat 12 is mounted on the chassis 13 of the vehicle in a known manner, such as, for example, via slides 14.
  • An adjustment mechanism 15 is provided for connecting the backrest 11 to the seat 12.
  • the adjustment mechanism 15 is adapted to adjust the relative inclination of the backrest 11 and the seat 12 in a narrow angular range, A, called comfort adjustment.
  • the adjustment mechanism 15 can lock in many positions in the angular range A of comfort.
  • the adjustment mechanism 15 can move the backrest 11 relative to the seat 12 over a wide angular range B, for example of the order of 60 ° or more.
  • the adjustment mechanism 15 is designed not to re-lock in many positions in the angular range B.
  • Such a system is of interest, especially for rapidly moving the backrest 11 forward relative to the seat 12, for example to access a space at the back of the backrest 11.
  • Such a seat finds applications for example in three-door vehicles.
  • a first control member 16 is operable by a user to adjust the angular position of the backrest 11 relative to the seat 12 in the range angular comfort.
  • a second control member such as a handle 17 located at the top of the seat, is actuable by a user to move the backrest 11 in the extended angular range B.
  • the handle 17 is for example connected to the adjustment mechanism 15 by a cable current inside the folder 11, and not shown.
  • the adjustment mechanism is for example a two-stage mechanism having an intermediate flange 18 delimiting, on one side, the tilt comfort adjustment mechanism, and on the other side the rear seat access mechanism.
  • the adjustment mechanism of the inclination in the comfort range A is conventional, for example continuous, as shown in Figure 5.
  • a fixed flange 60 attached to the seat for example and forming with the intermediate flange and a ring 61 holding a closed housing 22.
  • the comfort adjustment mechanism is for example a hypocycloidal mechanism comprising an external toothing 56 carried by the intermediate flange 18, and a pinion 57 having a toothing 58 with a number of teeth less than the external toothing 56 (for example, one less tooth), and in relation to engrainement with a part of it.
  • the pinion 57 is also eccentric relative to the intermediate flange 18 and is guided so that its center follows a circular path of small radius around the axis X.
  • a control disk 59 is fixed to the pinion 57 and the lever 16 to cause the rotation of the pinion 57 relative to the fixed flange 60, by which it is carried, and thus the rotation of the intermediate flange 18.
  • a braking mechanism such as for example described in FR 2 963 288, can be used to alternately control the drive of the intermediate flange 18 relative to the fixed flange 60, or prohibit it. During this operation, the other floor of the adjustment mechanism is locked, so that the rotation of the backrest is concomitant with the rotation of the intermediate flange 18.
  • the brake mechanism 62 comprises two cams 63 biased by a spring 64 to an eccentric position allowing a transfer of forces from the control disk 59 to the pinion 57.
  • the pinion 57 which is biased, the forces are not transmitted to the control disk 59.
  • it could be resorted to a mechanism batchwise.
  • the adjustment mechanism comprises the intermediate flange 18 comprising the ring 19 extending around the axis of rotation X.
  • the ring 19 has a radial outer surface 20 and an opposite radial inner surface 21.
  • the adjustment mechanism 15 also comprises a flange 23.
  • the flange 23 and the flange 18 together form a housing receiving a locking mechanism V.
  • the flange 23 comprises a peripheral ring 24 having a radially outer surface 25 and a radially inner surface 26.
  • the ring 24 surrounds the ring 20, the inner radial surface 26 of the ring 24 surrounding the radially outer surface 20 of the ring 19.
  • two flanges 18 and 23 are assembled with possibility of rotation relative to each other about the axis X, by any known means, such as in particular by plastic deformation of one of the flanges after assembly.
  • the flange 23 comprises a central plate 27 which defines guide rails 28 defining guideways for locking members.
  • three locking pins 29, 30 and 31 may be provided, each of which is mounted translatable in a respective guide slide 28.
  • the locking members 29, 30, 31 are movable on the flange 23 carrying them between a locking position, as visible in Figure two, and an unlocking position, radially more internal than the locking position.
  • the inner face 21 of the ring 19 of the flange 18 comprises a certain number of toothed sectors 32, 33, 34, in the same number as the toothed members 29, 30 and 31, namely three, in the present case.
  • the toothed sectors are for example regularly arranged equidistant, namely arranged all 120 °, in this case.
  • the mechanism also comprises a control cam 35 which is biased elastically towards a rest position shown in FIG.
  • the resilient biasing can for example be done by means of three spiral springs 36, a first end of which is fixed to a respective fixing pin 37 of the flange 23 and the opposite end bears against a bearing surface 38 of the cam 35.
  • the control cam 35 is rotatably mounted relative to the flange 23 between the rest position shown in FIG. 2 and an unlocking position, against the biasing of the springs 36. This unlocking position is reached by rotation around the X axis a few degrees from the position of Figure two. In the rest position, as visible in FIG. 2, the control cam 35 pushes the locking gear members 29, 30, 31 towards their locked position.
  • bosses 39 of the control cam which cooperate with respective bosses 40 of the locking member in the locked position.
  • the locking gear members 29, 30, 31, the control cam 35 and the springs 36 are well carried by the flange 27 (they are shown on the flange 18 in Figure 2 to show the guide rails 28).
  • the control cam 35 may comprise a central opening 41 in which is fitted a control shaft, not shown, also passing through the central opening 42 of the flange 23, and actuable by the handle 17.
  • the toothed locking member 29 has lateral guide surfaces 43, arranged radially, and cooperating with complementary guide surfaces 44 of the guiding slide 28.
  • the toothed locking member 29 comprises the stops 40 mentioned above, adapted to be pushed by the cam 35.
  • the locking toothed member comprises abutment surfaces 45 cooperating with abutment surfaces 46 complementary to the flange 23 to limit the movement radially inwardly of the toothed member 29.
  • the toothed member 29 also has a toothed profile 47 on its radially outer face.
  • a system can be provided for of abutment and memory of the toothed locking member 31.
  • a peripheral groove 50 having two end stops 66 and 66 'opposite, and is provided in the locking toothed member 31 a projection 51 having a shape complementary to the groove 50.
  • the projection 51 has two abutment lateral surfaces 65 and 65 'opposite.
  • the projection 51 is for example made by stamping in the locking member 31, so that the solid line in the figure of A represents a recess, the protrusion actually protruding on the opposite face to the visible face in Figure 2a of the locking member 31.
  • each toothed surface has a toothing 52 such as the teeth conventionally made for this kind of locking members.
  • Each toothed surface may also provide a notch 53 lug.
  • the lug 53 of each toothed bearing surface 47, 48 and 49 is arranged at a different peripheral position for each locking toothed element 29, 30 or 31.
  • the lug 53 is located at the right end of the toothed profile 47, the lug 53 is located at the left end of the toothed profile 48 of the locking gear member 30, and the lug 53 is located in an intermediate position between two tooth portions of the toothed profile 49 of the locking member 31.
  • the lug 53 extends radially further than the toothing 52.
  • the flange 18 (in particular the inner face 21 of the 19) comprises toothed sectors 32, 33, 34 complementary to the respective toothed profiles 47, 48 and 49 of the locking gear members 29, 30 and 31.
  • Each tooth sector comprises a teething profile, namely a particular arrangement of the tooth surfaces. locking with a complementary element, according to an extension direction (here peripheral).
  • the profile of each toothed sector comprises a toothing 54 such as the teeth conventionally made for this kind of locking members.
  • the profile of each sector toothed can also provide a recess 55 toothless. In the present exemplary embodiment, provision is made for the recess 55 of each toothed sector 32, 33 and 34 to be arranged at a different peripheral position for each toothed sector 32, 33 or 34.
  • the recess 53 is at the right end of the toothed sector 32
  • the recess 55 is at the left end of the toothed sector 33
  • 1 'recess 55 is located in an intermediate position between two tooth portions of the toothed sector 34, when seen from the center of the mechanism.
  • the recesses 55 are deeper than the teeth of the toothings of the toothed sectors.
  • each locking toothed member 29, 30 and 31 cooperates with a toothed sector 32, 33, 34 of the flange 18, to maintain the mechanism in its state. Locked.
  • the toothing 52 of a locking member cooperates with the toothing facing the corresponding tooth sector, and that the lug 53 enters the recess 55 facing it.
  • each toothed member is compatible with a single gear sector, among the toothed sectors of the flange 18, and reciprocally each toothed sector is compatible with a single toothed member carried by the flange 23. This is a coding.
  • the adjustment mechanism In its idle state, the adjustment mechanism is in its locked state, as shown exploded in FIG. In this state, and as described above, the springs 36 push the control cam 35 towards its rest position, in which it pushes each of the locking gear members 29, 30 and 31 radially outwardly so that each span toothed 47, 48 and 49 cooperates with a respective toothed sector 32, 33 and 34.
  • a user wishes to move the folder forward, it actuates the control 17, which generates a rotational movement of the cam 35 from the position shown in Figure two in the opposite direction of the clockwise, 1 ' against the biasing of the elastic elements 36.
  • a thrust on the backrest 11 by the user will cause the flange 23 to rotate about the axis X, the flange 23 being fixed to the backrest.
  • the toothed member 31 is guided out of its locked position by being driven by the teeth of the toothed sector.
  • the rotated control cam 35, the toothed member 31, as well as the toothed members 29 and 30 are each free to move radially inwards in the corresponding guide rails 28, since the control cam 35 does not interfere. more this displacement.
  • the flange 23 can then be rotated a few degrees with respect to the X axis around the flange 18, fixed to the seat.
  • the toothed locking member in particular its most radially remote position, namely the external surface of the lug 53
  • the locking toothed members 29, 30, 31 no longer face a respective toothed sector 32, 33 or 34 of the flange 18. Consequently, the user can release the handle 17 without there is a risk that the adjustment mechanism will re-lock.
  • the locking gear members 29, 30 and 31 reach a position, shown in Figure four, where each locking member faces to a toothed sector of the flange 18 (the locking gear members 29, 30 and 31 are artificially represented radially inwards to clearly see the differences in profiles).
  • the toothed profiles 47, 48 and 49 of the locking members not being compatible with the toothed sectors facing them, the adjustment mechanism can not lock in this position either.
  • the lug 53 of each of the locking members does not face the recess 55 of the tooth sector of the flange 18 facing it.
  • the user is thus free to rotate the backrest 11 at an angle of rotation greater than 120 °, without the risk of the control system returning to a locked state at an intermediate position of the extended angular stroke.
  • the backrest can be rotated to the stop of an abutment surface 65 of the locking toothed member 31 with the abutment 66 of the groove 50.
  • the file can be brought back to an initial position by an opposite sequence of operations.
  • the abutment between abutment surfaces 65 'and 66' shows the position in which the mechanism is allowed to re-interlock.
  • toothed member / toothed sector pairs As a variant, it will be possible to provide a different number of toothed member / toothed sector pairs, from 2 to 4 or more.
  • the distribution of these couples can therefore have a pitch different from 120 ° (for example, 90 ° for 4 couples).
  • boss / recess system could be reversed, or replaced by a similar system.
  • the toothed members could be mounted on the flange 18, and the groove 50 provided in the flange 23. In the bottom of the intermediate flange 50, there is shown two symmetrical identical grooves to provide a balanced part.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Seats For Vehicles (AREA)

Abstract

The motor vehicle seat adjustment mechanism comprises: a locking system. The locking system comprises first and second toothed sectors (32, 33, 34). The locking system also comprises at least first and second toothed members (29, 30, 31). The toothed sectors (32, 33, 34) have different respective profiles to each other, and the toothed members (29, 30, 31) have different respective toothed profiles to each other, the toothed profile (47, 48, 49) of each toothed member being associated with a single profile of the profiles of the toothed sectors.

Description

Mécanisme de réglage de siège de véhicule automobile  Motor vehicle seat adjustment mechanism
La présente invention est relative aux mécanismes de réglage de sièges de véhicules automobiles. The present invention relates to mechanisms for adjusting motor vehicle seats.
Plus particulièrement, l'invention se rapporte à un mécanisme de réglage de siège de véhicule automobile comprenant :  More particularly, the invention relates to a motor vehicle seat adjustment mechanism comprising:
- un premier élément,  - a first element,
un deuxième élément reliable à un composant de siège, et mobile par rapport au premier élément selon une direction,  a second element connectable to a seat component, and movable relative to the first element in one direction,
- un système de verrouillage pouvant prendre alternativement un état actif, dans lequel il interdit un déplacement relatif des premier et deuxième éléments selon la direction, et un état inactif, dans lequel il autorise ledit déplacement relatif,  a locking system which can take alternately an active state, in which it prohibits a relative displacement of the first and second elements according to the direction, and an inactive state, in which it authorizes said relative displacement,
dans lequel le système de verrouillage comprend au moins un premier et un deuxième secteurs dentés d'un des premier et deuxième éléments,  wherein the locking system comprises at least first and second tooth sectors of one of the first and second members,
dans lequel le système de verrouillage comprend également au moins un premier et un deuxième organes dentés portés par l'autre des premier et deuxième éléments, et mobiles par rapport à celui-ci.  wherein the locking system also comprises at least one first and second toothed members carried by the other of the first and second members, and movable relative thereto.
Le document FR 2 743 764 décrit un exemple d'un tel mécanisme de réglage, en l'occurrence une articulation à deux étages. Un premier étage est utilisé pour le réglage de confort d'inclinaison de l'occupant. Un deuxième étage, comprenant le système de verrouillage décrit ci-dessus, est utilisé pour basculer le dossier vers l'avant, par exemple pour faciliter l'accès aux places arrière.  Document FR 2,743,764 describes an example of such a setting mechanism, in this case a two-stage articulation. A first stage is used for occupant tilt comfort adjustment. A second stage, comprising the locking system described above, is used to tilt the backrest forward, for example to facilitate access to the rear seats.
Bien qu'un tel mécanisme présente entière satisfaction, la course de basculement est limitée à moins de 120°. Pour augmenter cette course, on pourrait utiliser un masque.  Although such a mechanism is entirely satisfactory, the tilting stroke is limited to less than 120 °. To increase this race, we could use a mask.
La présente invention a notamment pour but de permettre une plage de rotation supérieure à 120° sans cette pièce additionnelle. The present invention is intended in particular to allow a rotation range greater than 120 ° without this additional part.
A cet effet, selon l'invention, un mécanisme du genre en question est caractérisé en ce que les secteurs dentés présentent des profils respectifs différents les uns des autres, et les organes dentés présentent des profils dentés respectifs différents les uns des autres, le profil denté de chaque organe denté étant associé à un unique profil parmi les profils des secteurs dentés.  For this purpose, according to the invention, a mechanism of the kind in question is characterized in that the toothed sectors have respective profiles that are different from each other, and the toothed members have respective toothed profiles that are different from each other, the profile tooth of each toothed member being associated with a single profile among the profiles of the toothed sectors.
Grâce à ces dispositions, on empêche le reverrouillage du système dans une position autre que la position initiale sans pièce additionnelle, simplement en modifiant légèrement le procédé de fabrication des pièces de mécanismes antérieurs.  Thanks to these provisions, the re-locking of the system is prevented in a position other than the initial position without additional part, simply by slightly modifying the manufacturing process of the parts of previous mechanisms.
Dans des modes de réalisation préférés de l'invention, on peut éventuellement avoir recours en outre à l'une et/ou à l'autre des dispositions suivantes :  In preferred embodiments of the invention, one or more of the following may also be used:
chaque profil denté des organes dentés comprend une série de dents et un bossage disposés en série le long d'une direction d'extension, et les bossages de différents organes dentés sont disposés à des endroits différents selon l'organe denté ;  each toothed profile of the toothed members comprises a series of teeth and a boss arranged in series along an extension direction, and the bosses of different toothed members are arranged at different locations according to the toothed member;
- au moins un organe denté présente un bossage qui interrompt la série de dents ;  - At least one toothed member has a boss which interrupts the series of teeth;
- au moins un organe denté présente un bossage situé en une extrémité de la série de dents ;  - At least one toothed member has a boss located at one end of the series of teeth;
le premier élément comporte une piste périphérique continue sur 360° comportant les secteurs dentés circonférentiels ;  the first element comprises a 360 ° continuous peripheral track comprising the circumferential toothed sectors;
- les organes dentés sont guidés en translation par rapport au deuxième élément ;  - The toothed members are guided in translation relative to the second element;
en outre un système de commande actionnable par un utilisateur, adapté pour alternativement placer le système de verrouillage dans son état actif ou inactif ;  furthermore a user actuable control system adapted to alternately place the locking system in its active or inactive state;
- l'un des premier et deuxième éléments est un élément intermédiaire, le mécanisme de réglage comprenant en outre : - one of the first and second elements is a intermediate member, the adjusting mechanism further comprising:
.un troisième élément, l'élément intermédiaire étant mobile par rapport au troisième élément selon la direction,  a third element, the intermediate element being movable relative to the third element in the direction,
.un deuxième système de verrouillage pouvant prendre alternativement un état actif, dans lequel il interdit un déplacement relatif du troisième élément et de l'élément intermédiaire selon la direction, et un état inactif, dans lequel il autorise ledit déplacement relatif, le pas de verrouillage du deuxième système de verrouillage est inférieur au pas de verrouillage du premier système de verrouillage ;  a second locking system that can take alternately an active state, in which it prohibits a relative displacement of the third element and the intermediate element in the direction, and an inactive state, in which it allows said relative movement, the locking step the second locking system is less than the locking pitch of the first locking system;
le deuxième système de verrouillage est un système continu ;  the second locking system is a continuous system;
le deuxième système de verrouillage est système discontinu .  the second locking system is discontinuous system.
D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description suivante d'une de ses formes de réalisation, donnée à titre d'exemple non limitatif, en regard des dessins joints.  Other features and advantages of the invention will become apparent from the following description of one of its embodiments, given by way of non-limiting example, with reference to the accompanying drawings.
Sur les dessins :  On the drawings:
la figure 1 est une vue schématique de côté d'un siège de véhicule,  FIG. 1 is a schematic side view of a vehicle seat,
-la figure 2 est une vue en éclaté en perspective d'un mécanisme de réglage au niveau d'un premier étage selon un mode de réalisation,  FIG. 2 is an exploded perspective view of an adjustment mechanism at a first stage according to one embodiment,
-la figure 2a est une vue plane d'organes de verrouillage en position verrouillée,  FIG 2a is a plan view of locking members in locked position,
-la figure 2b est une vue plane, orientée comme la figure 2a, d'une couronne d'un flasque de verrouillage,  FIG 2b is a plan view, oriented as in FIG 2a, of a ring of a locking flange,
-la figure 3 est une vue plane du mécanisme de réglage dans une position d'accès aux places arrière,  FIG 3 is a plan view of the adjustment mechanism in a position of access to the rear seats,
-la figure 4 est une vue plane après rotation de 120° du flasque mobile, -la figure 5 est une vue similaire à la figure 2 au niveau d'un deuxième étage du mécanisme de réglage, et FIG 4 is a plane view after rotation of 120 ° of the mobile flange, FIG 5 is a view similar to Figure 2 at a second stage of the adjustment mechanism, and
-la figure 6 est une vue en coupe selon l'axe VI - VI sur la figure 5.  FIG 6 is a sectional view along the axis VI - VI in Figure 5.
Sur les différentes figures, les mêmes références désignent des éléments identiques ou similaires.  In the different figures, the same references designate identical or similar elements.
La figure une représente de manière schématique un siège 10 de véhicule automobile comprenant un dossier 11 monté rotatif, par exemple autour d'une assise 12. La rotation du dossier 11 par rapport à l'assise 12 se fait autour d'un axe transversal X. L'assise 12 est montée sur le châssis 13 du véhicule de manière connue, tel que, par exemple, par l'intermédiaire de glissières 14. Un mécanisme de réglage 15 est prévu pour la liaison du dossier 11 à l'assise 12. Dans un mode de réglage fin, le mécanisme de réglage 15 est adapté pour permettre de régler l'inclinaison relative du dossier 11 et de l'assise 12 dans une plage angulaire étroite, A, dite de réglage confort. Notamment, le mécanisme de réglage 15 peut se verrouiller dans de nombreuses positions dans la plage angulaire A de confort. Par ailleurs, dans un mode de basculement, le mécanisme de réglage 15 peut permettre de déplacer le dossier 11 par rapport à l'assise 12 dans toute une plage angulaire étendue B, par exemple de l'ordre de 60°, ou plus. Comme expliqué ci-après, le mécanisme de réglage 15 est prévu pour ne pas se reverrouiller en de nombreuses positions sur la plage angulaire B. Un tel système présente un intérêt, notamment pour déplacer rapidement le dossier 11 vers l'avant par rapport à l'assise 12, par exemple pour pouvoir accéder à un espace situé à l'arrière du dossier 11. Un tel siège trouve des applications par exemple dans des véhicules trois portes.  FIG. 1 schematically represents a seat 10 of a motor vehicle comprising a backrest 11 rotatably mounted, for example around a seat 12. The rotation of the backrest 11 relative to the seat 12 is around a transverse axis X The seat 12 is mounted on the chassis 13 of the vehicle in a known manner, such as, for example, via slides 14. An adjustment mechanism 15 is provided for connecting the backrest 11 to the seat 12. In a fine adjustment mode, the adjustment mechanism 15 is adapted to adjust the relative inclination of the backrest 11 and the seat 12 in a narrow angular range, A, called comfort adjustment. In particular, the adjustment mechanism 15 can lock in many positions in the angular range A of comfort. Furthermore, in a tilting mode, the adjustment mechanism 15 can move the backrest 11 relative to the seat 12 over a wide angular range B, for example of the order of 60 ° or more. As explained below, the adjustment mechanism 15 is designed not to re-lock in many positions in the angular range B. Such a system is of interest, especially for rapidly moving the backrest 11 forward relative to the seat 12, for example to access a space at the back of the backrest 11. Such a seat finds applications for example in three-door vehicles.
Un premier organe de commande 16 est actionnable par un utilisateur pour régler la position angulaire du dossier 11 par rapport à l'assise 12 dans la plage angulaire de confort. Un deuxième organe de commande, tel qu'une poignée 17 située en haut de siège, est actionnable par un utilisateur pour déplacer le dossier 11 dans la plage angulaire étendue B. La poignée 17 est par exemple reliée au mécanisme de réglage 15 par un câble courant à l'intérieur du dossier 11, et non représenté. A first control member 16 is operable by a user to adjust the angular position of the backrest 11 relative to the seat 12 in the range angular comfort. A second control member, such as a handle 17 located at the top of the seat, is actuable by a user to move the backrest 11 in the extended angular range B. The handle 17 is for example connected to the adjustment mechanism 15 by a cable current inside the folder 11, and not shown.
Le mécanisme de réglage est par exemple un mécanisme à deux étages présentant un flasque intermédiaire 18 délimitant, d'un coté, le mécanisme de réglage du confort d'inclinaison, et de l'autre côté le mécanisme d'accès aux places arrière.  The adjustment mechanism is for example a two-stage mechanism having an intermediate flange 18 delimiting, on one side, the tilt comfort adjustment mechanism, and on the other side the rear seat access mechanism.
Le mécanisme de réglage de l'inclinaison dans la plage confort A est de facture classique, pouvant être par exemple continu, tel que montré sur la figure 5. Ainsi, on prévoit un flasque fixe 60 fixé à l'assise par exemple et formant avec le flasque intermédiaire et une bague 61 de maintien un boîtier fermé 22. Le mécanisme de réglage confort est par exemple un mécanisme hypocycloïdal comprenant une denture externe 56 portée par le flasque intermédiaire 18, et un pignon 57 présentant une denture 58 avec un nombre de dents inférieur à la denture externe 56 (par exemple, une dent de moins), et en relation d ' engrainement avec une partie de celle-ci. Le pignon 57 est également excentré par rapport au flasque intermédiaire 18 et est guidé de sorte que son centre suive une trajectoire circulaire de faible rayon autour de l'axe X. Le maintien est assuré par la bague 61. Un disque de commande 59 est fixé au pignon 57 et au levier 16 pour entraîner la rotation du pignon 57 par rapport au flasque fixe 60, par lequel il est porté, et ainsi la rotation du flasque intermédiaire 18. Un mécanisme de freinage, tel que par exemple décrit dans FR 2 963 288, peut être utilisé pour alternativement commander l'entraînement du flasque intermédiaire 18 par rapport au flasque fixe 60, ou l'interdire. Pendant cette opération, l'autre étage du mécanisme de réglage est verrouillé, de sorte que la rotation du dossier est concomitante à la rotation du flasque intermédiaire 18. Comme visible sur la figure 6, le mécanisme de freinage 62 comprend deux cames 63 sollicitées par un ressort 64 vers une position excentrique permettant un transfert des efforts depuis le disque de commande 59 vers le pignon 57. Au contraire, lorsque c'est le pignon 57 qui est sollicité, les efforts ne sont pas transmis au disque de commande 59. En variante, on pourrait avoir recours à un mécanisme discontinu. The adjustment mechanism of the inclination in the comfort range A is conventional, for example continuous, as shown in Figure 5. Thus, there is provided a fixed flange 60 attached to the seat for example and forming with the intermediate flange and a ring 61 holding a closed housing 22. The comfort adjustment mechanism is for example a hypocycloidal mechanism comprising an external toothing 56 carried by the intermediate flange 18, and a pinion 57 having a toothing 58 with a number of teeth less than the external toothing 56 (for example, one less tooth), and in relation to engrainement with a part of it. The pinion 57 is also eccentric relative to the intermediate flange 18 and is guided so that its center follows a circular path of small radius around the axis X. The maintenance is provided by the ring 61. A control disk 59 is fixed to the pinion 57 and the lever 16 to cause the rotation of the pinion 57 relative to the fixed flange 60, by which it is carried, and thus the rotation of the intermediate flange 18. A braking mechanism, such as for example described in FR 2 963 288, can be used to alternately control the drive of the intermediate flange 18 relative to the fixed flange 60, or prohibit it. During this operation, the other floor of the adjustment mechanism is locked, so that the rotation of the backrest is concomitant with the rotation of the intermediate flange 18. As shown in Figure 6, the brake mechanism 62 comprises two cams 63 biased by a spring 64 to an eccentric position allowing a transfer of forces from the control disk 59 to the pinion 57. On the contrary, when it is the pinion 57 which is biased, the forces are not transmitted to the control disk 59. Alternatively, it could be resorted to a mechanism batchwise.
En ce qui concerne le mécanisme de réglage dans la plage d'inclinaison étendue, référence sera faite aux figures 2 à 4 de la description. Comme cela est visible sur la figure deux, le mécanisme de réglage comprend le flasque intermédiaire 18 comprenant la couronne 19 s 'étendant autour de l'axe de rotation X.  Regarding the adjustment mechanism in the extended inclination range, reference will be made to Figures 2 to 4 of the description. As can be seen in FIG. 2, the adjustment mechanism comprises the intermediate flange 18 comprising the ring 19 extending around the axis of rotation X.
La couronne 19 comporte une surface extérieure radiale 20 et une surface interne radiale 21 opposée.  The ring 19 has a radial outer surface 20 and an opposite radial inner surface 21.
Dans cet étage le mécanisme de réglage 15 comprend également un flasque 23. Le flasque 23 et le flasque 18 forment ensemble un boîtier recevant un mécanisme de verrouillage V. Par exemple, le flasque 23 comporte une couronne périphérique 24 comportant une surface radialement externe 25 et une surface radialement interne opposée 26. Lorsque le boîtier constitué du flasque 23 et du flasque 18 est fermé, la couronne 24 entoure la couronne 20, la surface radiale interne 26 de la couronne 24 entourant la surface radialement externe 20 de la couronne 19. Les deux flasques 18 et 23 sont assemblés avec possibilité de rotation l'un par rapport à l'autre autour de l'axe X, par tous moyens connus, tels qu'en particulier par déformation plastique de l'un des flasques après assemblage.  In this stage the adjustment mechanism 15 also comprises a flange 23. The flange 23 and the flange 18 together form a housing receiving a locking mechanism V. For example, the flange 23 comprises a peripheral ring 24 having a radially outer surface 25 and a radially inner surface 26. When the housing consisting of the flange 23 and the flange 18 is closed, the ring 24 surrounds the ring 20, the inner radial surface 26 of the ring 24 surrounding the radially outer surface 20 of the ring 19. two flanges 18 and 23 are assembled with possibility of rotation relative to each other about the axis X, by any known means, such as in particular by plastic deformation of one of the flanges after assembly.
Le flasque 23 comporte une plaque centrale 27 qui définit des glissières de guidage 28 définissant des chemins de guidage pour des organes de verrouillage. En particulier, on peut prévoir trois pions 29, 30 et 31 de verrouillage, qui sont montés translatifs chacun dans une glissière 28 de guidage respective. Ainsi, les organes de verrouillage 29, 30, 31 sont mobiles sur le flasque 23 les portant entre une position de verrouillage, telle que visible sur la figure deux, et une position de déverrouillage, radialement plus interne que la position de verrouillage . The flange 23 comprises a central plate 27 which defines guide rails 28 defining guideways for locking members. In In particular, three locking pins 29, 30 and 31 may be provided, each of which is mounted translatable in a respective guide slide 28. Thus, the locking members 29, 30, 31 are movable on the flange 23 carrying them between a locking position, as visible in Figure two, and an unlocking position, radially more internal than the locking position.
Comme cela est visible sur la figure 2b, la face interne 21 de la couronne 19 du flasque 18 comporte un certain nombre de secteurs dentés 32, 33, 34, en même nombre que les organes dentés 29, 30 et 31, à savoir trois, dans le cas présent. Les secteurs dentés sont par exemple disposés régulièrement équidistants , à savoir disposés tous les 120°, dans le cas présent.  As can be seen in FIG. 2b, the inner face 21 of the ring 19 of the flange 18 comprises a certain number of toothed sectors 32, 33, 34, in the same number as the toothed members 29, 30 and 31, namely three, in the present case. The toothed sectors are for example regularly arranged equidistant, namely arranged all 120 °, in this case.
Le mécanisme comporte également une came de commande 35 qui est sollicitée élastiquement vers une position de repos représentée sur la figure deux. La sollicitation élastique peut par exemple se faire par l'intermédiaire de trois ressorts spirale 36 dont une première extrémité est fixée à un pion de fixation 37 respectif du flasque 23 et l'extrémité opposée est en appui sur une surface d'appui 38 de la came 35. La came de commande 35 est montée rotative par rapport au flasque 23 entre la position de repos représentée sur la figure 2 et une position de déverrouillage, à l' encontre de la sollicitation des ressorts 36. Cette position de déverrouillage est atteinte par rotation autour de l'axe X de quelques degrés depuis la position de la figure deux. Dans la position de repos, telle que visible sur la figure deux, la came de commande 35 pousse les organes dentés de verrouillage 29, 30, 31 vers leur position verrouillée.  The mechanism also comprises a control cam 35 which is biased elastically towards a rest position shown in FIG. The resilient biasing can for example be done by means of three spiral springs 36, a first end of which is fixed to a respective fixing pin 37 of the flange 23 and the opposite end bears against a bearing surface 38 of the cam 35. The control cam 35 is rotatably mounted relative to the flange 23 between the rest position shown in FIG. 2 and an unlocking position, against the biasing of the springs 36. This unlocking position is reached by rotation around the X axis a few degrees from the position of Figure two. In the rest position, as visible in FIG. 2, the control cam 35 pushes the locking gear members 29, 30, 31 towards their locked position.
À cet effet, on peut par exemple prévoir des bossages 39 de la came de commande qui coopèrent avec des bossages respectifs 40 de l'organe de verrouillage dans la position verrouillée. For this purpose, it is possible for example to provide bosses 39 of the control cam which cooperate with respective bosses 40 of the locking member in the locked position.
Les organes dentés de verrouillage 29, 30, 31, la came 35 de commande et les ressorts 36 sont bien portés par le flasque 27 (ils sont représentés sur le flasque 18 sur la figure 2 pour montrer les glissières de guidage 28) .  The locking gear members 29, 30, 31, the control cam 35 and the springs 36 are well carried by the flange 27 (they are shown on the flange 18 in Figure 2 to show the guide rails 28).
Suite à la rotation de la came de commande en sa position de déverrouillage, les bossages 39 et 40 ne sont plus en regard l'un de l'autre, laissant l'organe denté de verrouillage 29, 30, 31 libre de se déplacer dans la glissière de guidage 28. La came de commande 35 peut comporter une ouverture centrale 41 dans laquelle est emmanché un arbre de commande, non représenté, passant également à travers l'ouverture centrale 42 du flasque 23, et actionable par la poignée 17. Following the rotation of the control cam in its unlocking position, the bosses 39 and 40 are no longer facing each other, leaving the toothed locking member 29, 30, 31 free to move in the guide slide 28. The control cam 35 may comprise a central opening 41 in which is fitted a control shaft, not shown, also passing through the central opening 42 of the flange 23, and actuable by the handle 17.
Comme cela est visible sur la figure 2a, l'organe denté de verrouillage 29 comporte des surfaces latérales de guidage 43, disposées radialement, et coopérant avec des surfaces de guidage 44 complémentaires de la glissière de guidage 28. Sur sa face arrière, l'organe denté de verrouillage 29 comporte les butées 40 mentionnées ci- dessus, adaptées à être repoussées par la came 35. Dans sa portion radialement extérieure, l'organe denté de verrouillage comprend des surfaces de butées 45 coopérant avec des surfaces de butées 46 complémentaires du flasque 23 pour limiter le déplacement radialement vers l'intérieur de l'organe denté 29. L'organe denté 29 comporte également un profil denté 47 sur sa face radialement extérieure.  As can be seen in FIG. 2a, the toothed locking member 29 has lateral guide surfaces 43, arranged radially, and cooperating with complementary guide surfaces 44 of the guiding slide 28. On its rear face, the toothed locking member 29 comprises the stops 40 mentioned above, adapted to be pushed by the cam 35. In its radially outer portion, the locking toothed member comprises abutment surfaces 45 cooperating with abutment surfaces 46 complementary to the flange 23 to limit the movement radially inwardly of the toothed member 29. The toothed member 29 also has a toothed profile 47 on its radially outer face.
Une description similaire peut être faite pour l'organe denté de verrouillage 30, dont le profil denté porte la référence 48.  A similar description can be made for the locking gear member 30, whose toothed profile carries the reference 48.
Une description similaire peut être faite pour l'organe denté de verrouillage 31, dont le profil denté porte la référence 49.  A similar description can be made for the toothed locking member 31, whose toothed profile bears the reference 49.
On peut par exemple par ailleurs prévoir un système de butée et de mémoire de l'organe denté de verrouillage 31. À ce titre, on prévoit dans le flasque 18 une rainure périphérique 50 présentant deux butées d'extrémité 66 et 66' opposées, et on prévoit dans l'organe denté de verrouillage 31 une saillie 51 présentant une forme complémentaire de la rainure 50. En particulier, la saillie 51 comporte deux surfaces latérales de butée 65 et 65' opposées . For example, a system can be provided for of abutment and memory of the toothed locking member 31. As such, there is provided in the flange 18 a peripheral groove 50 having two end stops 66 and 66 'opposite, and is provided in the locking toothed member 31 a projection 51 having a shape complementary to the groove 50. In particular, the projection 51 has two abutment lateral surfaces 65 and 65 'opposite.
La saillie 51 est par exemple réalisée par emboutissage dans l'organe de verrouillage 31, de sorte que le trait plein sur la figure de A représente un évidement, la saillie faisant en fait protrusion sur la face opposée à la face visible sur la figure 2a de l'organe verrouillage 31.  The projection 51 is for example made by stamping in the locking member 31, so that the solid line in the figure of A represents a recess, the protrusion actually protruding on the opposite face to the visible face in Figure 2a of the locking member 31.
En ce qui concerne les trois portées dentées 47,48, With regard to the three toothed surfaces 47,48,
35 et 49 des organes dentés de verrouillage 29, 30 et 31, elles sont réalisées différentes. Par exemple, chaque portée dentée comporte une denture 52 telles que les dentures classiquement réalisées pour ce genre d'organes de verrouillage. Chaque portée dentée peut également prévoir un ergot 53 non denté. Dans le présent exemple de réalisation, on prévoit que l'ergot 53 de chaque portée dentée 47, 48 et 49 soit disposé à une position périphérique différente pour chaque organe denté de verrouillage 29, 30 ou 31. Par exemple, avec l'orientation des pièces telles que présentées sur la figure 2a, l'ergot 53 se situe à l'extrémité droite du profil denté 47, l'ergot 53 se situe à l'extrémité gauche du profil denté 48 de l'organe denté de verrouillage 30, et l'ergot 53 se situe en une position intermédiaire entre deux parties de dentures du profilé denté 49 de l'organe de verrouillage 31. D'autres modes de réalisation seraient bien évidemment possibles. Par ailleurs, l'ergot 53 s'étend radialement plus loin que la denture 52. 35 and 49 locking teeth 29, 30 and 31, they are made different. For example, each toothed surface has a toothing 52 such as the teeth conventionally made for this kind of locking members. Each toothed surface may also provide a notch 53 lug. In the present embodiment, it is provided that the lug 53 of each toothed bearing surface 47, 48 and 49 is arranged at a different peripheral position for each locking toothed element 29, 30 or 31. For example, with the orientation of the teeth parts as shown in Figure 2a, the lug 53 is located at the right end of the toothed profile 47, the lug 53 is located at the left end of the toothed profile 48 of the locking gear member 30, and the lug 53 is located in an intermediate position between two tooth portions of the toothed profile 49 of the locking member 31. Other embodiments are of course possible. Furthermore, the lug 53 extends radially further than the toothing 52.
Le flasque 18 (notamment la face interne 21 de la couronne 19) comporte des secteurs dentés 32, 33, 34 complémentaires des profils dentés respectifs 47,48 et 49 des organes dentés de verrouillage 29, 30 et 31. Chaque secteur denté comporte un profil de dentition, à savoir un agencement particulier des surfaces de verrouillage avec un élément complémentaire, selon une direction d'extension (ici périphérique) . Par exemple, le profil de chaque secteur denté comporte une denture 54 telles que les dentures classiquement réalisées pour ce genre d'organes de verrouillage. Le profil de chaque secteur denté peut également prévoir un évidement 55 non denté. Dans le présent exemple de réalisation, on prévoit que 1 ' évidement 55 de chaque secteur denté 32, 33 et 34 soit disposé à une position périphérique différente pour chaque secteur denté 32, 33 ou 34. Ainsi, on réalise des profils différents. Par exemple, avec l'orientation des pièces telles que présentées sur la figure 2b, 1 ' évidement 53 se situe à l'extrémité droite du secteur denté 32, 1 ' évidement 55 se situe à l'extrémité gauche du secteur denté 33, et 1 'évidement 55 se situe en une position intermédiaire entre deux parties de dentures du secteur denté 34, quand vu depuis le centre du mécanisme. D'autres modes de réalisation seraient bien évidemment possibles. Par ailleurs, les évidements 55 sont plus profonds que les dents des dentures des secteurs dentés. The flange 18 (in particular the inner face 21 of the 19) comprises toothed sectors 32, 33, 34 complementary to the respective toothed profiles 47, 48 and 49 of the locking gear members 29, 30 and 31. Each tooth sector comprises a teething profile, namely a particular arrangement of the tooth surfaces. locking with a complementary element, according to an extension direction (here peripheral). For example, the profile of each toothed sector comprises a toothing 54 such as the teeth conventionally made for this kind of locking members. The profile of each sector toothed can also provide a recess 55 toothless. In the present exemplary embodiment, provision is made for the recess 55 of each toothed sector 32, 33 and 34 to be arranged at a different peripheral position for each toothed sector 32, 33 or 34. Thus, different profiles are produced. For example, with the orientation of the parts as shown in FIG. 2b, the recess 53 is at the right end of the toothed sector 32, the recess 55 is at the left end of the toothed sector 33, and 1 'recess 55 is located in an intermediate position between two tooth portions of the toothed sector 34, when seen from the center of the mechanism. Other embodiments would obviously be possible. Moreover, the recesses 55 are deeper than the teeth of the toothings of the toothed sectors.
Ainsi, dans la position verrouillée du mécanisme de réglage, telle que représentée sur la figure 2, chaque organe denté de verrouillage 29, 30 et 31 coopère avec un secteur denté 32, 33, 34 du flasque 18, pour maintenir le mécanisme dans son état verrouillé. Par coopération, on comprend que la denture 52 d'un organe de verrouillage coopère avec la denture lui faisant face du secteur denté correspondant, et que l'ergot 53 rentre dans 1 ' évidement 55 lui faisant face.  Thus, in the locked position of the adjustment mechanism, as shown in FIG. 2, each locking toothed member 29, 30 and 31 cooperates with a toothed sector 32, 33, 34 of the flange 18, to maintain the mechanism in its state. Locked. By cooperation, it is understood that the toothing 52 of a locking member cooperates with the toothing facing the corresponding tooth sector, and that the lug 53 enters the recess 55 facing it.
Ainsi, chaque organe denté est compatible avec un unique secteur denté, parmi les secteurs dentés du flasque 18, et réciproquement chaque secteur denté est compatible avec un unique organe denté porté par le flasque 23. On réalise ainsi un codage. Thus, each toothed member is compatible with a single gear sector, among the toothed sectors of the flange 18, and reciprocally each toothed sector is compatible with a single toothed member carried by the flange 23. This is a coding.
Le mécanisme qui vient d'être décrit fonctionne comme suit .  The mechanism just described works as follows.
Dans son état au repos, le mécanisme de réglage est dans son état verrouillé, tels que représenté en éclaté sur la figure deux. Dans cet état, et comme décrit plus haut, les ressorts 36 poussent la came de commande 35 vers sa position de repos, dans laquelle elle pousse chacun des organes dentés de verrouillage 29, 30 et 31 radialement vers l'extérieur de sorte que chaque portée dentée 47, 48 et 49 coopère avec un secteur denté respectif 32, 33 et 34.  In its idle state, the adjustment mechanism is in its locked state, as shown exploded in FIG. In this state, and as described above, the springs 36 push the control cam 35 towards its rest position, in which it pushes each of the locking gear members 29, 30 and 31 radially outwardly so that each span toothed 47, 48 and 49 cooperates with a respective toothed sector 32, 33 and 34.
Si un utilisateur souhaite déplacer le dossier vers l'avant, il actionne la commande 17, qui génère un mouvement de rotation de la came 35 depuis la position représentée sur la figure deux dans le sens opposé des aiguilles d'une montre, à 1 'encontre de la sollicitation des éléments élastiques 36. Une poussée sur le dossier 11 par l'utilisateur va entraîner la rotation du flasque 23 autour de l'axe X, le flasque 23 étant fixé au dossier. Au cours de cette rotation, l'organe denté 31 est guidé hors de sa position verrouillée en étant chassé par la denture du secteur denté. La came de commande 35 ayant tourné, l'organe denté 31, ainsi que les organes dentés 29 et 30 sont chacun libres de se déplacer radialement vers l'intérieur dans les glissières de guidage 28 correspondantes, car la came de commande 35 n'interfère plus ce déplacement. On peut alors faire tourner le flasque 23 de quelques degrés par rapport à l'axe X autour du flasque 18, fixé à l'assise. Au cours de ce déplacement l'organe denté de verrouillage (en particulier sa position la plus radialement éloignée, à savoir la surface externe de l'ergot 53) glisse sur la surface interne radiale 21 de la couronne 20, y compris les secteurs dentés. Dans cette position, représentée sur la figure trois, les organes dentés de verrouillage 29, 30, 31 ne font plus face à un secteur denté 32,33 ou 34 respectif du flasque 18. Par conséquent, l'utilisateur peut relâcher la poignée 17 sans risque de voir le mécanisme de réglage se revérouiller . If a user wishes to move the folder forward, it actuates the control 17, which generates a rotational movement of the cam 35 from the position shown in Figure two in the opposite direction of the clockwise, 1 ' against the biasing of the elastic elements 36. A thrust on the backrest 11 by the user will cause the flange 23 to rotate about the axis X, the flange 23 being fixed to the backrest. During this rotation, the toothed member 31 is guided out of its locked position by being driven by the teeth of the toothed sector. The rotated control cam 35, the toothed member 31, as well as the toothed members 29 and 30 are each free to move radially inwards in the corresponding guide rails 28, since the control cam 35 does not interfere. more this displacement. The flange 23 can then be rotated a few degrees with respect to the X axis around the flange 18, fixed to the seat. During this movement the toothed locking member (in particular its most radially remote position, namely the external surface of the lug 53) slides on the radial inner surface 21 of the crown 20, including the toothed sectors. In this position, represented in FIG. 3, the locking toothed members 29, 30, 31 no longer face a respective toothed sector 32, 33 or 34 of the flange 18. Consequently, the user can release the handle 17 without there is a risk that the adjustment mechanism will re-lock.
Si le dossier 11 tourne de 120°, dans l'exemple représenté, par rapport au flasque d'assise, les organes dentés de verrouillage 29, 30 et 31 atteignent une position, représentée sur la figure quatre, où chaque organe de verrouillage fait face à un secteur denté du flasque 18 (les organes dentés de verrouillage 29, 30 et 31 sont artificiellement resprésentés radialement vers l'intérieur pour bien voir les différences de profils) . Toutefois, les profils dentés 47, 48 et 49 des organes de verrouillage n'étant pas compatibles avec les secteurs dentés leur faisant face, le mécanisme de réglage ne peut pas non plus se verrouiller dans cette position. En particulier, dans la position de la figure quatre, l'ergot 53 de chacun des organes de verrouillage ne fait pas face à 1 ' évidement 55 du secteur denté du flasque 18 lui faisant face .  If the backrest 11 rotates 120 °, in the example shown, relative to the seat flange, the locking gear members 29, 30 and 31 reach a position, shown in Figure four, where each locking member faces to a toothed sector of the flange 18 (the locking gear members 29, 30 and 31 are artificially represented radially inwards to clearly see the differences in profiles). However, the toothed profiles 47, 48 and 49 of the locking members not being compatible with the toothed sectors facing them, the adjustment mechanism can not lock in this position either. In particular, in the position of FIG. 4, the lug 53 of each of the locking members does not face the recess 55 of the tooth sector of the flange 18 facing it.
L'utilisateur est ainsi libre de faire tourner le dossier 11 selon un angle de rotation supérieur à 120°, sans risque de voir le système de réglage reprendre un état verrouillé en une position intermédiaire de la course angulaire étendue. Le dossier peut être tourné jusqu'à la butée d'une surface de butée 65 de l'organe denté de verrouillage 31 avec la butée 66 de la rainure 50.  The user is thus free to rotate the backrest 11 at an angle of rotation greater than 120 °, without the risk of the control system returning to a locked state at an intermediate position of the extended angular stroke. The backrest can be rotated to the stop of an abutment surface 65 of the locking toothed member 31 with the abutment 66 of the groove 50.
Le dossier peut être ramené dans une position initiale par une suite opposée d'opérations. La butée entre les surfaces de butée 65' et 66' montre la position dans lequel le mécanisme est autorisé à se revérouiller.  The file can be brought back to an initial position by an opposite sequence of operations. The abutment between abutment surfaces 65 'and 66' shows the position in which the mechanism is allowed to re-interlock.
En variante on pourra prévoir un nombre différents de couples organe denté/secteur denté, de 2 à 4 ou plus. La répartition de ces couples peut donc avoir un pas différent de 120° (par exemple, 90° pour 4 couples) . Par ailleurs, le système bossage/évidement pourrait être inversé, ou remplacé par un système analogue. Les organes dentés pourraient être montés sur le flasque 18, et la rainure 50 prévue dans le flasque 23. Dans le fond du flasque intermédiaire 50, on a représenté deux rainures identiques symétriques afin de prévoir une pièce équilibrée. En variante, on pourrait utiliser une rainure 50 de la portée angulaire choisie, tel que par exemple 120°, ou plus, entre ses deux surfaces de butée 66 et 66'. As a variant, it will be possible to provide a different number of toothed member / toothed sector pairs, from 2 to 4 or more. The The distribution of these couples can therefore have a pitch different from 120 ° (for example, 90 ° for 4 couples). In addition, the boss / recess system could be reversed, or replaced by a similar system. The toothed members could be mounted on the flange 18, and the groove 50 provided in the flange 23. In the bottom of the intermediate flange 50, there is shown two symmetrical identical grooves to provide a balanced part. Alternatively, one could use a groove 50 of the selected angular range, such as for example 120 ° or more, between its two abutment surfaces 66 and 66 '.

Claims

REVENDICATIONS
1. Mécanisme de réglage de siège de véhicule automobile comprenant : A motor vehicle seat adjustment mechanism comprising:
- un premier élément (18),  a first element (18),
un deuxième élément (23) reliable à un composant de siège, et mobile par rapport au premier élément selon une direction,  a second member (23) connectable to a seat component, and movable relative to the first member in a direction,
- un système de verrouillage, (V) pouvant prendre alternativement un état actif, dans lequel il interdit un déplacement relatif des premier et deuxième éléments (18,23) selon la direction, et un état inactif, dans lequel il autorise ledit déplacement relatif,  a locking system, (V) alternatively in an active state, in which it prohibits a relative movement of the first and second elements (18, 23) according to the direction, and an inactive state, in which it authorizes said relative displacement,
dans lequel le système de verrouillage comprend au moins un premier et un deuxième secteurs dentés (32, 33, 34) d'un des premier et deuxième éléments,  wherein the locking system comprises at least first and second toothed sectors (32, 33, 34) of one of the first and second members,
dans lequel le système de verrouillage comprend également au moins un premier et un deuxième organes dentés (29, 30, 31) portés par l'autre des premier et deuxième éléments, et mobiles par rapport à celui-ci,  wherein the locking system also comprises at least first and second gear members (29, 30, 31) carried by and movable with the other of the first and second members,
caractérisé en ce que les secteurs dentés (32, 33, 34) présentent des profils respectifs différents les uns des autres, et les organes dentés (29, 30, 31) présentent des profils dentés respectifs différents les uns des autres, le profil denté (47, 48, 49) de chaque organe denté étant associé à un unique profil parmi les profils des secteurs dentés.  characterized in that the toothed sectors (32, 33, 34) have respective profiles different from one another, and the toothed members (29, 30, 31) have respective toothed profiles which are different from each other, the tooth profile ( 47, 48, 49) of each toothed member being associated with a single profile among the profiles of the toothed sectors.
2. Mécanisme de réglage selon la revendication 1, dans lequel chaque profil denté (47, 48, 49) des organes dentés comprend une série de dents et un bossage (53) disposés en série le long d'une direction d'extension, et dans lequel les bossages (53) de différents organes dentés sont disposés à des endroits différents selon l'organe denté .  An adjusting mechanism according to claim 1, wherein each toothed gear profile (47, 48, 49) comprises a series of teeth and a boss (53) arranged in series along an extension direction, and wherein the bosses (53) of different toothed members are arranged at different locations according to the toothed member.
3. Mécanisme de réglage selon la revendication 2, dans lequel au moins un organe denté (51) présente un bossage (53) qui interrompt la série de dents. 3. Adjustment mechanism according to claim 2, wherein at least one toothed member (51) has a boss (53) which interrupts the series of teeth.
4. Mécanisme de réglage selon la revendication 2 ou 3, dans lequel au moins un organe denté présente un bossage (53) situé en une extrémité de la série de dents.  4. Adjustment mechanism according to claim 2 or 3, wherein at least one toothed member has a boss (53) located at one end of the series of teeth.
5. Mécanisme de réglage selon l'une des revendications précédentes, dans lequel le premier élément (18) comporte une piste périphérique (21) continue sur 360° comportant les secteurs dentés (32, 33, 34) circonférentiels .  5. Adjustment mechanism according to one of the preceding claims, wherein the first element (18) comprises a 360 ° continuous peripheral track (21) comprising the circumferential tooth sectors (32, 33, 34).
6. Mécanisme de réglage selon l'une des revendications précédentes, dans lequel les organes dentés (29, 30, 31) sont guidés en translation par rapport au deuxième élément (23) .  6. Adjustment mechanism according to one of the preceding claims, wherein the toothed members (29, 30, 31) are guided in translation relative to the second element (23).
7. Mécanisme de réglage selon l'une des revendications précédentes comprenant en outre un système de commande (35) actionnable par un utilisateur, adapté pour alternativement placer le système de verrouillage (V) dans son état actif ou inactif.  7. Adjustment mechanism according to one of the preceding claims further comprising a control system (35) actuated by a user, adapted to alternately place the locking system (V) in its active or inactive state.
8. Mécanisme de réglage selon l'une des revendications précédentes, dans lequel l'un (18) des premier et deuxième éléments est un élément intermédiaire, le mécanisme de réglage comprenant en outre :  8. Adjustment mechanism according to one of the preceding claims, wherein one (18) of the first and second elements is an intermediate element, the adjustment mechanism further comprising:
un troisième élément (60), l'élément intermédiaire (18) étant mobile par rapport au troisième élément selon la direction,  a third element (60), the intermediate element (18) being movable relative to the third element in the direction,
un deuxième système de verrouillage (62) pouvant prendre alternativement un état actif, dans lequel il interdit un déplacement relatif de l'élément intermédiaire et du troisième élément (60) selon la direction, et un état inactif, dans lequel il autorise ledit déplacement relatif, dans lequel le pas de verrouillage du deuxième système de verrouillage est inférieur au pas de verrouillage du premier système de verrouillage.  a second locking system (62) which can take alternately an active state, in which it prohibits a relative displacement of the intermediate element and the third element (60) in the direction, and an inactive state, in which it authorizes said relative displacement wherein the locking pitch of the second locking system is less than the locking pitch of the first locking system.
9. Mécanisme de réglage selon la revendication 8, dans lequel le deuxième système de verrouillage est système continu. 9. Adjustment mechanism according to claim 8, wherein the second locking system is a continuous system.
10. Mécanisme de réglage selon la revendication dans lequel le deuxième système de verrouillage est système discontinu.  10. Adjustment mechanism according to claim wherein the second locking system is discontinuous system.
PCT/FR2013/052774 2012-11-20 2013-11-19 Motor vehicle seat adjustment mechanism WO2014080115A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1261003 2012-11-20
FR1261003A FR2998228B1 (en) 2012-11-20 2012-11-20 MECHANISM FOR ADJUSTING THE SEAT OF A MOTOR VEHICLE

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WO2014080115A1 true WO2014080115A1 (en) 2014-05-30

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024006547A1 (en) * 2022-07-01 2024-01-04 Camaco, Llc. Locking assembly for recliner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743764A1 (en) * 1996-01-22 1997-07-25 Faure Bertrand Equipements Sa Vehicle seat back angle adjustment mechanism with two rotary flanges
DE19957523A1 (en) * 1999-11-30 2001-06-21 Grammer Ag Adjustment mechanism, especially for pivotable motor vehicle arm rests, has two relatively pivotable parts, first with engagement profile(s) engaged by latching lever on second part
DE102007044311A1 (en) * 2007-09-17 2009-03-19 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Device for locking and securing a backrest of a vehicle seat
DE102008028475A1 (en) * 2008-05-16 2009-11-19 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Fitting arrangement for e.g. passenger seat of motor vehicle, has rotary position fixing unit provided between shaft, door side cam disk and adjusting element, such that two cam disks, shaft and element are connected with each other
FR2951413A1 (en) * 2009-10-20 2011-04-22 Faurecia Sieges Automobile MOTOR VEHICLE SEAT ADJUSTMENT MECHANISM, AND VEHICLE SEAT
FR2963288A1 (en) * 2010-07-29 2012-02-03 Faurecia Sieges Automobile JOINT MECHANISM AND VEHICLE SEAT COMPRISING SUCH A MECHANISM.
DE102011075364A1 (en) * 2011-05-05 2012-11-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Seat component for a seat and assembly with seat component and rotatable actuating shaft

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743764A1 (en) * 1996-01-22 1997-07-25 Faure Bertrand Equipements Sa Vehicle seat back angle adjustment mechanism with two rotary flanges
DE19957523A1 (en) * 1999-11-30 2001-06-21 Grammer Ag Adjustment mechanism, especially for pivotable motor vehicle arm rests, has two relatively pivotable parts, first with engagement profile(s) engaged by latching lever on second part
DE102007044311A1 (en) * 2007-09-17 2009-03-19 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Device for locking and securing a backrest of a vehicle seat
DE102008028475A1 (en) * 2008-05-16 2009-11-19 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Fitting arrangement for e.g. passenger seat of motor vehicle, has rotary position fixing unit provided between shaft, door side cam disk and adjusting element, such that two cam disks, shaft and element are connected with each other
FR2951413A1 (en) * 2009-10-20 2011-04-22 Faurecia Sieges Automobile MOTOR VEHICLE SEAT ADJUSTMENT MECHANISM, AND VEHICLE SEAT
FR2963288A1 (en) * 2010-07-29 2012-02-03 Faurecia Sieges Automobile JOINT MECHANISM AND VEHICLE SEAT COMPRISING SUCH A MECHANISM.
DE102011075364A1 (en) * 2011-05-05 2012-11-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Seat component for a seat and assembly with seat component and rotatable actuating shaft

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FR2998228B1 (en) 2014-12-19
FR2998228A1 (en) 2014-05-23

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