FR3037008A1 - VEHICLE SEAT AND METHOD OF ADJUSTING SUCH A SEAT - Google Patents

Abstract

Vehicle seat and method of adjusting a vehicle seat comprising a seat, a backrest pivotally mounted on the seat, a first control mechanism normally in a locked and unlockable position to allow a first seat movement, a second seat mechanism normally controls in a locked and unlocked position to allow a second seat movement, and an output device (40) operable by a single actuator in a first direction (W1) in which it selects a control mode of the first or of the second control mechanism and in a second direction (W2) in which it unlocks the selected control mechanism.

Description

The present invention relates to vehicle seats and methods for adjusting such seats.

More particularly, the invention relates to a vehicle seat comprising: - a seat, - a backrest pivotally mounted on the seat, - a first control mechanism normally in a locked and unlocked position to allow a first seat movement - a second control mechanism normally in a locked and unlocked position to allow a second seat movement, and - a single actuating device, - an output device connected to the actuating device. By "seat movement" is meant here a movement of either the entire seat or part of the seat relative to another. BACKGROUND OF THE INVENTION There are such vehicle seats in which the first and second control mechanisms are a backrest folding device and a longitudinal position adjustment device of the seat. Document US7374243B2 describes an example of a vehicle seat of this type, more particularly allowing the seat and the back of a seat to be folded back together completely before unlocking the seat in translation. The system described in US7374243B2 requires sequencing of these two actions to allow easier entry into the passenger compartment of a vehicle. In order to perform the particular sequencing (and thus to prevent the seat from shifting forward, which would reduce the desired space gain for passenger entry), the system disclosed in US7374243B2 involves complex arrangements. The object of the invention is in particular to overcome this drawback. SUMMARY OF THE INVENTION To this end, according to the invention, a seat of the kind in question is characterized in that the output device is adapted to selectively be configured either in a first control mode where said output device is in taken with the first control mechanism via a first transmission member, or in a second control mode where said output device is engaged with the second control mechanism via a second control member. transmission, in that the output device is a bistable mechanism which is adapted to switch from the first control mode to the second control mode by an actuation of the actuating device in a first direction and to switch from the second control mode to the first control mode by actuation of the actuating device in the first direction, and in that the output device is adapted to unlock either the first m control scheme when said output device is in the first control mode and is operated in a second opposite direction to the first direction, ie the second control mechanism when the output device is in the second control mode and is operated in the second control mode; second sense.

Thanks to these arrangements, a simple seat is made to implement, ensuring optimal operational safety of the device, a simple maneuverability for a user and increased comfort. In preferred embodiments of the invention, one or both of the following arrangements may optionally be further employed: - one of the first and second control mechanisms is a mechanism guide adapted to allow adjustment of the longitudinal position of the seat; The guiding mechanism comprises a slideway having a first profile and a second section extending in a longitudinal direction and slidably mounted relative to each other in said longitudinal direction, and a locking device adapted to allow a Moving the second profile relative to the first profile; the other of the first and second control mechanisms is a hinge mechanism adapted to allow adjustment of the angular position of the backrest relative to the seat; the output device comprises an inactive position in which said output device does not act with the first control mechanism or with the second control mechanism; The output device is movable in rotation about an axis of rotation: in the first direction between the inactive position and a selection position where the first and second control mechanisms are in the locked position and in which the device the output mode changes control mode, and - in the second direction between said inactive position and an active position in which said output device unlocks the control mechanism 30 with which it is engaged in the last chosen control mode; the output device comprises a toothed wheel connected to the actuating device, said toothed wheel is rotatable about the axis of rotation, and at least one pin driven in rotation by the gear wheel around 3037008; axis of rotation and movable radially between a centered position in which said pin is in contact with the first transmission member when said output device is in the first control mode, and an eccentric position in which said pin is in contact with the first second transmission member when said output device is in the second control mode; the output device is housed in a housing comprising a bottom, having an internal face, and a cover having an internal face facing the internal face of the bottom, the internal face of at least one of the bottom and the cover comprising at least one guide having an asymmetric profile comprising an abutment portion perpendicular to the axis of rotation and an inclined ramp adapted to guide the at least one pin between the centered position and the eccentric position when the output device is moved in the first direction of rotation; the output device further comprises an elastic member adapted to resiliently bias the pin towards the centered position; the first transmission member is a first driving cam movable in rotation about an axis of rotation between a rest position and an actuating position in which said first driving cam unlocks the first control mechanism; the first drive cam comprises a transmission surface and the pin of the output device co-operates with said transmission surface when the toothed wheel of the output device moves in the second direction and the output device is in the first direction. command mode; the second transmission member is a second driving cam movable in rotation about an axis of rotation between a rest position and an actuating position in which said second drive cam unlocks the second drive mechanism; ordered ; The second driving cam comprises a transmission surface and the pin of the output device cooperates with said transmission surface when the gear wheel of the output device moves in the second direction and the output device is in the second direction. 10 command mode; - The seat further comprises a second slide and a second guide mechanism, the second guide mechanism being connected to the guide mechanism of the first slide by a cross member, the output device being fixed on said crossbar; The present invention is also directed to a method for adjusting a first and / or a second movement of a seat as previously described comprising the following steps: detecting the initial control mode selected by the output device from the first command mode and the second control mode, - operating the output device in the first direction so as to select the other one of the first control mode and the second control mode when the desired control mode is not the control mode. initial command, - operate the output device in the second direction to allow the first or second seat movement selected.

In preferred embodiments of the invention, one or both of the following provisions may be furthermore used: the method further comprises, after the step of actuating the device In the second direction, actuate the output device again in the first direction to reset said output device in the initial control mode detected during the detection step. BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will emerge during the following description of one of its embodiments, given by way of non-limiting example, with reference to the accompanying drawings. In the drawings: FIG. 1 is a schematic view of a vehicle seat according to the invention comprising a guiding mechanism and a hinge mechanism, FIG. 2 is a perspective view of a lower part of the vehicle. vehicle seat of FIG. 1 equipped with guiding and articulation mechanisms and comprising an output device; FIGS. 3 and 4 are partly half-cut partial perspective views of the output device and the first and second transmission members; along the directions III and IV of FIG. 2; FIG. 5 is an axial sectional view of the output device and the first and second transmission members along the sectional plane VV of FIG. 2; FIG. is a sectional view of the output device, in the inactive position, and the first transmission member, in the rest position, along the sectional plane VI-VI of FIG. 5; FIG. 7 is a sectional view of FIG. output device of FIG. the active position and the first transmission member of FIG. 6, in the actuating position; FIG. 8 is a sectional view of the output device of FIG. 6, in the selection position and the first transmission member of FIG. FIG. 6, in the rest position, FIG. 9 is a sectional view of the output device, in the inactive position, and of the second transmission member, in the rest position, according to the IX-IX section plane. FIG. 5 is a sectional view of the output device of FIG. 9, in the active position, and the first transmission member of FIG. 9, in the actuating position. In the various figures, the same references designate identical or similar elements. DETAILED DESCRIPTION OF THE INVENTION In the following description, when referring to absolute position qualifiers, such as the terms 'forward', 'backward', 'high', 'low', 'left', 'right', etc., or relative, such as the terms 'above', 'below', 'above', 'below', etc., or with qualifiers for orientation, reference is made to a seat in a normal position of use of it in the direction of ordinary progression of the vehicle.

In the present case, in the following description, the term 'locking device' will have to be interpreted in a broad sense to describe a device adapted to perform an action intended to render immobile or to make mobile a first element with respect to a second element, regardless of the relative initial position of the first and second elements. Figure 1 is a schematic view of a seat 1, in particular a seat 1 of the vehicle according to the invention. More particularly, Figure 1 shows the seat 1 30 having a backrest 2 pivotally mounted about at least one pivot axis Y1 on a seat 4. The seat 4 is itself mounted to move in translation on a fixed structure 6, in particular a floor of the vehicle. The seat 1 is such that it is possible to adjust an inclination R of the backrest 2 relative to the seat 4 and a position P of the seat 1 relative to the fixed structure 6. In this case, the seat 1, as shown in particular in Figure 1, comprises two control mechanisms. Each of the control mechanisms is a mechanism with a locking device that prohibits said movement of the seat until said control mechanism is actuated. Usually, this actuation is done manually by a control member 8 accessible to a user, such as a handle or the like. According to the invention, as will be described hereinafter with reference to FIGS. 2 to 10, the two control mechanisms are controlled by the same actuating device 22 (visible in FIG. 2), for example electrically controlled. The two actuating mechanisms operable by the single actuator 22 must be designed to be normally locked and operable to allow movement of the seat 1 by releasing at least a portion of said seat 1. More particularly, the control mechanisms FIG. 1 comprises: - a guide mechanism 10 adapted to adjust the position 25 P of the seat 1 with respect to the fixed structure 6 by sliding in a longitudinal direction X; - An articulation mechanism 20 adapted to adjust the inclination R of the backrest 2. Other control mechanisms are of course possible.

The seat 1 comprises, as mentioned above, a guiding mechanism 10. The guiding mechanism 10 comprises at least one slideway 30, and preferably two slideways 30. The slideway 30 makes it possible to adjust, for example, the position P of the seat 1 relative to the fixed structure 6, including the floor of the vehicle, by a sliding in the longitudinal direction X of the slide. The slideway 30 comprises a first profile 32 and a second profile 34. The first profile 32 and the second profile 34 extend in the longitudinal direction X. The first profile 32 and the second profile 34 are slidably mounted relative to one another. to the other in the longitudinal direction X. For example, the second section 34 is assembled integral with a structural element of the seat 4.

Similarly, the first section 32 is, for example, integral with the fixed structure 6, in particular integral with the floor of the vehicle. As a result, the first section 32 is also called a fixed or lower profiled section. Similarly, the second section 34 is also called mobile section or upper section. In order to prevent sliding of the second section 34 with respect to the first section 32, the guide mechanism 10 also comprises a first locking device 11.

The first locking device 11 is movably mounted between a locking position and an unlocking position. In the locking position, the first locking device 11 locks the position of the second profile 34 with respect to the first profile 32, thus preventing any relative movement in the longitudinal direction X of the second profile 34 relative to the first profile 32. In the unlocked position, the first locking device 11 allows the second profile 34 to move relative to the first profile 32. The first locking device 11 can be resiliently biased towards the locking position. Thus, the locking position is a so-called "stable" position. However, in alternative embodiments, the first locking device 11 may not be elastically biased to a particular position, or have two so-called "stable" positions, such as, for example, the locking position and the position unlocking.

The seat 1 comprises, as mentioned above, a hinge mechanism 20. The hinge mechanism 20 comprises a first frame 24 and a second frame 26. The first frame 24 is secured to a structural element of the seat 4. For example, the first armature 24 may be formed by a disc-shaped metal flange having as normal the pivot axis Y1. The second armature 26 is secured to a structural element of the backrest 2. For example, the second armature 26 may be formed by a disk-shaped metal flange having for normal the pivot axis Y1. The first armature 24 and the second armature 26 are rotatably mounted relative to each other about the pivot axis Y1. For example, the first armature 24 and the second armature 26 may be interconnected by a rotation device (not shown) providing easy rotation between the first armature 24 and the second armature 26. This rotation device is conventional and not will not be described in more detail. The hinge mechanism 20 further comprises a second locking device 28 adapted to maintain or define an angular position of the second frame 26 relative to the first frame 24. Thus, the user of the seat 1, having chosen the angular position of the backrest 2 relative to the seat 4 which is suitable for it can lock (or block) this angular position and make it stable. More specifically, the second locking device 28 is movable between a locking position and an unlocking position. In the locking position, the second locking device 28 fixes the angular position of the second armature 26 relative to the first armature 24. Thus, in the locking position of the second locking device 28, the second armature 26 can not not move relative to the first armature 24 around the pivot axis Y1. In other words, the backrest 2 can not move relative to the seat 4. For example, the second locking device 28 acts on the rotation device (not shown) via a lock or any another type of structure blocking the rotation. This lock or rotational locking structures are conventional and will not be described in more detail. In the unlocking position, the second locking device 28 allows the second armature 26 to move relative to the first armature 24 around the pivot axis Y1. The second locking device 28 may be biased resiliently toward the locking position. Thus, the locking position is a so-called "stable" position. However, in alternative embodiments, the second locking device 28 may not be resiliently biased towards a particular position, or may have two so-called "stable" positions, such as, for example, the locking position and the unlocking position. .

The guide mechanism 10 and the hinge mechanism 20 are actuated by a single actuating device 22. In other words, the actuating device 22 can move the first locking device 11, especially towards an unlocking position and the second locking device 28 in particular to an unlocking position. The actuating device 22 may be an electric actuator. However, in alternative embodiments, the actuator 22 may be a hydraulic, pneumatic, mechanical, or other actuator controlled by an electrical control signal. The actuating device 22 may be an electric actuator and comprise an electric motor of any type or a piezoelectric actuator.

The actuating device 22 is adapted to drive the output device 40 in rotation about an axis of rotation Y2. The axis of rotation Y2 may be perpendicular to the longitudinal direction X. The actuating device 22 can move the output device 40 in a first direction W1 and in a second direction W2 opposite to the first direction W1. The output device 40 is initially either in one of a control mode of the guiding mechanism 10 and a control mode of the hinge mechanism 20. When the output device 40 is moved in the first direction W1, selects the other from the control mode of the guiding mechanism 10 and the control mode of the hinge mechanism 20. When the output device 40 is moved in the second direction W2, it actuates the guiding mechanism 10 or the articulation mechanism 20 according to the selected mode. The actuating device 22 is, for example, fixed to a crossmember 36 connecting the slideways 30, as shown in FIG. 2. However, in alternative embodiments, the actuating device 22 may be fixed on one of the slideways 30. The output device 40 is housed in a closed housing 37. The housing 37 may be formed by the cross member 36 and by a fixed closure plate 38, forming a cover of said housing 37, fixed to said crossbar 36, for example by screws (not shown). The cross member 36 forming the bottom of the housing 37 has an inner face 36a facing the outlet device 40 and an outer face 36b opposite the inner face 36a.

The inner face 36a of the cross member 36 forming the bottom of the housing 37 comprises at least at least one guide 70 projecting from said inner face 36a. Each of these guides 70 may be L-shaped. Each of these guides 70 includes, for example, an abutment portion 71 having a surface perpendicular to the Y2 axis of rotation and an inclined ramp 72 on the opposite side of the guide. 70. Thus, the at least one guide 70 has an asymmetrical profile whose utility will be seen later. The fixed closure plate 38 has an internal face 38a facing the outlet device 40 and facing the inner face 36a of the cross member 36, and an outer face 38b opposite the inner face 38a. The inner face 38a of the fixed closure plate 38 comprises at least one rib 39 projecting on said inner face 38a. The rib 39 extends between a first end 39a and a second end 39b. The rib 39 may comprise an outgrowth 39c extending radially to the inner face 38a of the fixed closure plate 38. The inner face 38a further comprises at least one guide 75 projecting from said inner face 38a. Each of these guides 75 may be L-shaped. Each of these guides 75 comprises, for example, an abutment portion 76 having a surface perpendicular to the axis of a ramp 77 inclined on the opposite side. less a guide 75 has a profile whose utility will be seen later. The output device 40 is connected to the guiding mechanism 10 by a first transmission member 50, for example, adapted to actuate the guiding mechanism 10 only when the output device 40 is in the control mode of the guiding mechanism 10 and is moved in the second direction W2 of rotation. The output device 40 is connected to the hinge mechanism 20 by a second transmission member 60, for example, adapted to actuate the rotation mechanism Y2 and the hinged guide 75. 3037008 14 only when the output device 10 is in the control mode of the hinge mechanism 20 and is moved in the second direction W2 of rotation.

However, in an alternative embodiment, the second transmission member 60 is adapted to actuate the guiding mechanism 10 only when the output device 40 is in the control mode of the guiding mechanism 10 and is moved in the second direction. W2 rotation and the first transmission member 50 is adapted to actuate the hinge mechanism 20 only when the output device 40 is in the control mode of the hinge mechanism 20 and is moved in the second direction W2 of rotation.

The actuating device 22 can be controlled by the user via a control means. For example, the actuating device 22 is controlled via the single control member 8, which allows the output device 40 to be operated in the control mode of the guiding mechanism 10 or in the operating mode. In the present case, the output device 40 is actuated in a first angular range, in the first direction W1 of rotation, between an inactive position and a selection position in which it selects the desired position. another of the control mode of the guiding mechanism 10 and the control mode of the hinge mechanism 20 of the initial control mode.

The output device 40 is actuated in a second angular range between the inactive position and an active position in which it acts on the first locking device 11 when the output device 40 is in the control mode of the guide mechanism 10 and wherein it acts on the second locking device 28 when the output device 40 is in the control mode of the hinge mechanism 20 to cause a displacement of said first or second locking device 11, 28 to the position of the locking device 28. unlocking, so as to respectively release the movement of the first frame 24 relative to the second frame 26 or the movement of the second section 34 relative to the first section 32. The output device 40 thus makes it possible to transmit a movement of the device. 22 actuation alternately to the guide mechanism 10 and the articulation mechanism 20. More particularly, the di output device 40 makes it possible to transmit a movement of the actuating device 22 alternately to the guiding mechanism 15 via the first transmission member 50 and to the articulation mechanism 20 via the second transmission member 60. The first transmission member 50 is shown in Figures 3 to 9, rotatable about the axis of rotation Y2. The first transmission member 50 is, for example, a drive cam 50. The first drive cam 50 is movable between a rest position in which it holds the first locking device 11 in the locking position so as to maintaining the guiding mechanism 10 in the locked position and an operating position in which it drives the first locking device 11 to the unlocking position so as to actuate the guiding mechanism 10.

The first drive cam 50 comprises at least two portions 51, 52 advantageously substantially semicircular, the first portion 51 preferably having a radius greater than the second portion 52. A recess 53 may be provided between the two portions 51, 52 of the first drive cam 50. More precisely, two recesses 53 can be provided. The recesses 53 ensure the continuity of the cam profile between the first portion 51 and the second portion 52. One of the recess 53 may form a transmission surface S of the first drive cam 50 intended to cooperate with the device. output 40 to transmit motion to the first locking device 11 when the first driving cam 50 is moved in the second direction of rotation W2 from the rest position to the actuating position. In the example shown, the first drive cam 50 advantageously comprises two first portions 51 opposite one another and two second portions 52 opposite to each other. Each first portion 51 comprises a recess 53 capable of forming a transmission surface S. The first driving cam 50 is pierced by a central internal recess 55 through which a connecting shaft 46 passes.

The second transmission member 60 is, as shown in Figures 3 to 10, rotatable about the axis of rotation Y2. The second transmission member 60 is, for example, a second drive cam 60.

The second driving cam 60 is movable between a rest position in which it holds the second locking device 28 in the locking position so as to maintain the hinge mechanism 20 in the locked position and an operating position 30. in which it drives the second locking device 28 to the unlocking position so as to actuate the articulation mechanism 20. The second driving cam 60 comprises at least two portions 61, 62 advantageously substantially semi-circular, the first portion 61 preferably having a radius greater than the second portion 62. A recess 63 may be provided between the two portions 61, 62 of the second driving cam 60. More precisely, two recesses 63 may be provided. The recesses 63 ensure the continuity of the cam profile between the first portion 61 and the second portion 62. More particularly, the first portion 61 has a shoulder 64. The shoulder 64 marks a lower portion 65 10 of an upper portion 66 of the first portion 61. Thus, the upper portion 66 comprises two recesses 63a ensure the continuity of the cam profile between the upper portion 66 and the lower portion 65 of the first portion 61. The lower portion 65 of the first portion 61 comprises two recesses. 63b ensure the continuity of the cam profile between the lower portion 65 of the first portion 61 and the second portion 62. One of the recess 63 may form a transmission surface S of the second drive cam 60 to cooperate with each other. with the output device 40 to transmit motion to the second locking device 28 when the second driving cam 60 is moved into the second s ens W2 of rotation from the rest position to the actuating position. More particularly, one of the recesses 63a of the upper portion 66 may form a transmission surface S of the second driving cam 60 intended to cooperate with the output device 40 in order to transmit a movement to the second locking device 28 when the second driving cam 60 is moved in the second direction W2 of rotation from the rest position to the operating position In the example shown, the second driving cam 60 advantageously comprises two first opposed portions 61 one to the other and two second 3037008 18 portions 62 opposite one another. The upper portion 66 of each first portion 61 comprises a recess 63a capable of forming a transmission surface S. The second driving cam 60 is pierced by a central internal recess 67 through which the connecting shaft 46 passes. outlet 40 comprises, for example, as illustrated in FIGS. 3 and 4, a toothed wheel 41, a return spring 42 and at least one pin 43.

The toothed wheel 41 is rotatable about the axis of rotation Y2 in the first direction W1 of rotation between an inactive position in which the guide mechanism 10 and the hinge mechanism 20 are in the locked position, and a position in which the guiding mechanism 10 and the hinge mechanism 20 are still in the locked position and in which it passes to the control mode of the guiding mechanism 10 when it is initially in the control mode of the guiding mechanism. 20 or it moves to the control mode of the articulation mechanism 20 when it is initially in the control mode of the guide mechanism 10. The gear wheel 41 is rotatable about the axis of rotation Y2 between the inactive position and an active position in which said toothed wheel 41 actuates the first transmission member 50 or the second transmission member 60. The gear wheel 41 may be in the form of a disk. that centered on the axis of rotation Y2 having an inner face 41a facing the cross member 36, an outer face 41b opposite the inner face 41a and an outer edge 41c. The toothed wheel 41 is pierced by an internal recess 45 through which the connecting shaft 46 passes. The toothed wheel 41 is disposed in the closed housing 37. More particularly, the gear 41 is interposed 3037008 19 axially between the first transmission member 50 and the second transmission member 60. At least a portion of the outer edge 41c of the gear 41 includes a shoulder 47. The shoulder 47 5 extends between a first end 47a and a second end 47b. At least a part of the shoulder 47 comprises an external toothing 47c. The external toothing 47c is adapted to engage with an external toothing 23c of a transmission wheel 23b of the actuating device 22. The shoulder 47 may further comprise a protuberance 47d extending radially to the outer face 41b of the toothed wheel 41. The protrusion 47d is situated substantially close to the first end 47a of the shoulder 47.

The toothed wheel 41 further comprises a collar 48, having a semicircular shape, integral with said toothed wheel 41. The collar 48 may for example be formed in one piece with the toothed wheel 41 and it extends axially from the outer face 41b of the toothed wheel 41. The collar 48 defined with the shoulder 47 an inner region adapted to receive the return spring 42. The toothed wheel 41 further comprises at least one recess 49. The recess 49 presents, for example, an oblong shape. Preferably, the toothed wheel 41 comprises two recesses 49 distributed angularly around the axis of rotation Y2. The toothed wheel 41 includes a first guide 49a projecting from the inner face 41a of said toothed wheel 41. The first guide 49a may have a partially wedge-shaped shape, for example, the contour of a first end of the recess 49. The toothed wheel 41 includes a second guide 49b projecting from the outer face 41b of said toothed wheel 41. The second guide 49b may have a partially conforming shape of J, for example the contour of a second end. of the recess 49, opposite to the first end. The at least one transmission pin 43 has, for example, the shape of a cylindrical. Preferably, the output device 40 comprises two pins 43. Each of the pins 43 is housed in one of the recesses 49 of the toothed wheel 41. Each of the pins 43 is rotated by the toothed wheel 41 about the axis of rotation. Y2. Each of the pins 43 is integral in rotation around the axis of rotation Y2 of the toothed wheel 41. Each of the pins 43 is slidably mounted in one of the recesses 49 of the toothed wheel 41 between a centered position and an eccentric position. In the centered position, the pin 43 is in contact with the second guide 49b of the toothed wheel 41. In the eccentric position, the pin 43 is in contact with the first guide 49a of the toothed wheel 41. In the centered position, the pin 43 is adapted to be in contact with one of the first and second transmission members 50, 60 when the toothed wheel 41 is in the inactive position or in the active position.

In the eccentric position, the pin 43 is adapted to be in contact with the other of the first and second transmission members 50, 60 when the toothed wheel 41 is in the inactive position or in the active position. Preferably, the output device 40 may further comprise a resilient member 44. The pin 43 is elastically biased towards the position centered by the elastic member 44. The elastic member 44 may be a spring. The spring 44 comprises a body 44a extending between a first end 44b and a second end 44c. The first end 44b is integral with a first pin 43. The second end 44c is, for example, integral with a second pin 43. The return spring 42 is for example a helical spring having a cylindrical body 42a spiral 35s extending between a first end 42b and a second end 42c. The first end 42b and the second end 42c for example protrude radially outwardly from the body 42a spiral. The spiral body 42a is centered on the axis of rotation Y2. The body 42a 5 spiral is free around the outer face 41b of the toothed wheel 41. The first end 42b bears against the first end 39a of the rib 39 of the fixed closing plate 38. The first end 42b can also wear against the protuberance 47d of the shoulder 47 of the toothed wheel 41. The second end 42c bears against the protuberance 39c of the rib 39 of the fixed closing plate 38. The second end 42c can also bear against the second end 47b of the shoulder 47 of the toothed wheel 41. Thus, the return spring 42 carries 15 at a time on the fixed closure plate 38 and on the toothed wheel 41. The toothed wheel 41 is biased elastically towards the inactive position by the return spring 42. The displacement of the toothed wheel 41 from the inactive position to the selection position, or to the active position, causes a twisting of the return spring 42. More particularly, said displacement The end of the toothed wheel 41 places the first end 42b, or the second end 42c, of the return spring 42 in abutment against the first end 39a of the rib 39 of the fixed closure plate 38, or against the protrusion 39c of the the rib 39 of the fixed closure plate 38, tending to twist said return spring 42. When the actuating device 22 no longer actuates the toothed wheel 41, the return spring 42 then moves said toothed wheel 41 of the position 30 active, or selection position, to the inactive position. The actuating device 22 may comprise an actuating rod (not shown) rotatable and the transmission wheel 23b directly assembled to the actuating rod. The transmission wheel 23b is movable in rotation about a transmission axis (which is in this case parallel to the axis of rotation Y2). The external toothing 23c, belonging to the transmission wheel 23b, is adapted to engage in the teeth of the external toothing 47c of the shoulder 47 of the routed wheel 41 in order to transmit the movement of the actuating rod to output device 40 and more particularly to said toothed wheel 41. For example, the return spring 42 is provided, so as to allow, in particular in the absence of power supply, an elastic return of the toothed wheel 41 to the position inactive, the toothed wheel 41 driving the actuating device 22 to a rest position, in which the actuating device 22 exerts no effort on the toothed wheel 41. The actuating device 22 and the transmission wheel 23b can be reversible. Thus, the actuating rod can be rotatable about its axis in a first direction of rotation and in a second direction of rotation. The first direction of rotation is opposite to the second direction of rotation. Thus, for example, when the actuating rod is actuated in the first direction, it drives the toothed wheel 41 towards the selection position and when the actuating rod is actuated in the second direction of rotation it can, for example , drive the toothed wheel 41 to the inactive position. Alternatively, when the actuating rod is actuated in the second direction, it drives the toothed wheel 41 to the active position and when the actuating rod 30 is actuated in the first direction of rotation it can, for example, drive the wheel gear 41 to the inactive position. In the present case, in the absence of actuation of the actuating device 22, the toothed wheel 41 is in the inactive position, in which the output device 40 does not control either the first locking device 11 or the second locking device 28. The adjustment of the vehicle seat 1 previously described operates as follows: In a first step, the user controls the actuating device 22, for example by means of the control member 8, to actuate the output device 40 in the control mode of the guiding mechanism 10 or in the control mode of the hinge mechanism 20 and thereby allow the unblocking of said guiding mechanism 10 (and thus the displacement of the second section 34 relative to the first section 32), ie the unlocking of said articulation mechanism 20 (and thus the displacement of the first armature relative to the second armature). Allowing the second frame to move relative to the first frame thus makes it possible to adjust the angular position of the backrest 2 with respect to the seat 4. The displacement of the second profile 34 relative to the first profile 32 makes it possible to adjust the position P the seat 4 of the seat 1 relative to the fixed structure 6 in the longitudinal direction X. When the user wishes to adjust the position P of the seat 4 of the seat 1 relative to the fixed structure 6 25 in the longitudinal direction X, it actuates the first control member 8. The actuating device determines the initial state of the output device 40, namely it determines whether the output device is in the control mode of the guide mechanism 10 or in the The initial state of the output device is, for example, stored in a memory (not shown). When the initial state of the output device 40 corresponds to the control mode of the guide mechanism 10, the pins 43 are in their centered position and each of the pins 43 is then in contact with the transmission surface S of the recesses 53. of the first drive cam 50. The actuating device 22 moves in rotation in the second direction W2 of rotation the toothed wheel 41 from the inactive position 5 (FIG. 6) to the active position (FIG. 7). The pins 43 then move said first driving cam 50, without moving the second driving cam 60, from the rest position (FIG. 6) to the operating position (FIG. 7) in which it drives the first device 11 to the unlocking position so as to actuate the guiding mechanism 10. The user makes his adjustment then the toothed wheel returns to the inactive position and the first drive cam returns to the rest position, blocking the position P of the seat 4 of the seat 1. When the initial state of the output device 40 does not correspond to the control mode of the guide mechanism 10, the actuating device 22 rotates in the first direction W1 of rotating the toothed wheel 41 from the inactive position (FIG. 6) to the selection position (FIG. 8). The output device 40 changes from the control mode of the articulation mechanism 20 to the control mode of the guide mechanism 10. More particularly, the movement of the toothed wheel 41 in the first direction W1 of rotation causes the displacement of each of the pins 43 along the ramp 72 and the respective ramp 77 of the guides 70 and 75. The pins 43 and pass from the eccentric position (Figure 8) to the centered position. The gear wheel 41 is biased resiliently by the spring 42 to the inactive position. The actuating device 22 then moves in rotation in the second direction W2 of rotation the toothed wheel 41 from the inactive position (FIG. 6) to the active position (FIG. 7). The pins 43 are in their centered position and each of the pins 43 is then in contact with the transmission surface S of the recesses 53 of the first drive cam 50. The pins 43 then move said first drive cam 50, without moving the second driving cam 60 from the rest position (FIG. 6) to the operating position (FIG. 7) in which it drives the first locking device 11 towards the unlocking position so as to actuate the guiding mechanism 10.

The user makes his adjustment then the toothed wheel returns to the inactive position and the first driving cam returns to the rest position, blocking the position P of the seat 4 of the seat 1. When the user wishes to adjust the angular position of the backrest 2 relative to the seat 4, it preferably actuates the second control member. The actuating device 22 determines the initial state of the output device 40. When the initial state of the output device 40 corresponds to the control mode of the articulation mechanism 20, the pins 43 are in their off-center position and each pins 43 is then in contact with the transmission surface S of the recesses 63 of the second drive cam 60. The actuating device 22 rotates in the second direction 25 W2 of rotation the toothed wheel 41 of the inactive position (Figure 9) at the active position (Figure 10). The pins 43 then move said second driving cam 60, without moving the first driving cam 50, from the rest position (FIG. 9) to the operating position 30 (FIG. 10) in which it drives the second device 28 to the unlocking position so as to actuate the hinge mechanism 20. The user makes his adjustment and then the toothed wheel returns to the inactive position and the second drive cam 60 returns to the position of rest, blocking the angular position of the backrest 2 relative to the seat 4. When the initial state of the output device 40 5 does not correspond to the control mode of the hinge mechanism 20, the actuating device 22 moves in rotation in the first direction W1 of rotation the toothed wheel 41 from the inactive position (FIG. 9) to the selection position (FIG. 8). The output device 40 changes from the control mode of the guide mechanism 10 to the control mode of the articulation mechanism 20. More particularly, the movement of the toothed wheel 41 in the first direction W1 of rotation causes the displacement of each of the Pions 43 along the ramp 72 and the respective ramp 77 of the guides 70 and 75. The pins 43 and pass from the centered position to the centered position (Figure 8). The slack wheel 41 is biased resiliently by the spring 42 to the inactive position. The actuating device 22 then moves in rotation in the second rotational direction W2 the toothed wheel 41 from the inactive position (FIG. 9) to the active position (FIG. 10). The pins 43 are in their eccentric position and each of the pins 43 is then in contact with the transmission surface S of the recesses 63 of the second drive cam 60. The pins 43 then move said second drive cam 60, without moving the first drive cam 50 from the rest position to the actuating position in which it drives the second locking device 28 to the unlocking position so as to actuate the hinge mechanism 20. The user it is then adjusted and the toothed wheel returns to the inactive position and the second drive cam 60 returns to the rest position, blocking the angular position of the backrest 2 relative to the seat 3037008 27 4. Alternatively, the state initial device of the output device 40 is not memorized. The output device 40 always defaults to one of the control mode of the guiding mechanism 10 and the hinge mechanism 20. Thus, if for example the output device 40 is by default in the control mode 10 of the guide mechanism and that the user wishes to adjust the angular position of the backrest 2 10 relative to the seat 4, the toothed wheel performs a first rotation in the first direction W1 of rotation to select the mode of controlling the articulation mechanism 20 of the output device 40, then said gearwheel performs a second rotation in the second rotation direction W2 in order to drive the second locking device 28 to the unlocking position so as to actuate the mechanism 20 and finally the toothed wheel 41 performs a third rotation in the first direction W1 of rotation in order to select the default control mode of the device. output 40 (in the control mode of the guide mechanism 10). 25

Claims (10)

REVENDICATIONS1. Vehicle seat comprising: - a seat (4), - a backrest (2) pivotally mounted on the seat (4), - a first control mechanism (10; 20) normally in a locked and unlocked position to allow a first seat movement; - a second control mechanism (10; 20) normally in a locked and unlocked position to allow a second seat movement; and - a single actuating device (22) - an output device ( 40) connected to the actuator, characterized in that the output device is adapted to selectively be configured in either a first control mode where said output device is engaged with the first control mechanism via a first transmission member (50), ie in a second control mode where said output device is engaged with the second control mechanism via a second transmission member (60), in that the output device is a bistable mechanism which is adapted to switch from the first control mode to the second control mode by actuation of the actuator in a first direction (W1) and to switch from second control mode in the first control mode by an actuation of the actuating device in the first direction, and in that the output device is adapted to unlock either the first control mechanism when said output device is in the first control mode and is operated in a second direction (W2) opposite the first direction, the second control mechanism 35 when the output device is in the second control mode and is actuated in the second direction. The seat according to claim 1, wherein one of the first and second control mechanisms (10; 20) is a guide mechanism (10) adapted to allow adjustment of the longitudinal position of the seat (4). . The seat according to claim 1 or 2, wherein the other one of the first and second control mechanisms (10; 20) is a hinge mechanism (20) adapted to allow adjustment of the angular position of the backrest (2). relative to the seat (4). The seat according to any one of the preceding claims, wherein the output device (40) comprises an inactive position in which said output device does not act with either the first control mechanism (10; 20) or the second control mechanism (10; 20). 5. Seat according to claim 4, wherein the output device (40) is rotatable about an axis of rotation (Y2): - in the first direction (W1) between the inactive position 25 and a selection position wherein the first and second control mechanisms (10; 20) are in the locked position and in which the output device changes control mode, and - in the second direction (W2) between said inactive position and an active position in which said output device unlocks the control mechanism with which it is engaged in the last selected mode. 35 The seat according to claim 4 or 5, wherein the output device (40) comprises a gear wheel (41) connected to the actuating device (22), said gear wheel is rotatable about the axis. of rotation (Y2), and at least one pin (43) rotated by the toothed wheel (41) about the axis of rotation (Y2) and movable radially between a centered position in which said pin is in contact with the first transmission member (50) when said output device is in the first control mode, and an eccentric position in which said pin is in contact with the second transmission member (60) when said output device is in the second mode. The seat according to claim 6, wherein the output device (40) is housed in a housing (37) comprising a bottom (36), having an inner face (36a), and a cover (38) having a face inner face (38a) facing the inner face of the bottom, the inner face (36a, 38a) of at least one of the bottom and the cover comprising at least one guide (70, 75) having an asymmetrical profile comprising an abutment portion (71, 76) perpendicular to the axis of rotation (Y2) and an inclined ramp (72, 77) adapted to guide the at least one pin (43) between the centered position and the eccentric position when the output device is moved in the first direction (W1). 8. Seat according to any one of the preceding claims, wherein the first transmission member (50) is a first drive cam rotatable about an axis of rotation (Y2) between a rest position and a position actuating device in which said first driving cam unlocks the first control mechanism (10; 20). 3037008 31 Seat according to any one of the preceding claims, wherein the second transmission member (60) is a second driving cam movable in rotation about an axis of rotation (Y2) between a rest position and a rest position. actuating position in which said second driving cam unlocks the second control mechanism (10; 20). A method of adjusting a first and / or a second seat motion according to any one of the preceding claims comprising the steps of: - detecting the initial control mode selected by the output device (40) from among the first mode of control 15 and the second control mode, - actuating the output device (40) in the first direction (W1) so as to select the other one of the first control mode and the second control mode when the desired control mode is not the initial control mode, - actuate the output device (40) in the second direction (W2) so as to allow the first or second seat movement selected. 25