FR3037009A1 - VEHICLE SEAT AND METHOD OF ADJUSTING SUCH A SEAT - Google Patents

Abstract

Vehicle seat and method for adjusting a vehicle seat comprising a seat, a backrest pivotally mounted on the seat, a first control mechanism normally in a locked position and operable to allow a first seat movement, a second seat mechanism normally controls in a locked and operable position to allow a second seat movement, and an output device (40) actuated by a single actuator is at a first speed to actuate the first control mechanism, or at a second speed to operate the second 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 operable position to authorize a first seat movement a second control mechanism normally in a locked position and operable to allow a second seat movement, and a single actuating device. By "seat movement" is meant here a displacement 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 device for adjusting the longitudinal position of the seat. Document US Pat. No. 7,374,243 B2 describes an example of a vehicle seat of this type, more particularly allowing the seat and the backrest of a seat to be folded back together 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 achieve the particular sequencing (and thus to prevent the seat from shifting before folding, which would reduce the space gain desired for passenger entry), the system described in US7374243B2 involves complex arrangements.

The object of the invention is in particular to propose an alternative solution to this problem of complexity. SUMMARY OF THE INVENTION To this end, according to the invention, a seat of the type 5 in question is characterized in that it further comprises an output device actuated by the actuating device either at a first speed or at a second gear, the output device being connected to the first control mechanism by a first transmission member adapted to actuate the first control mechanism only when the output device is moved the first gear, the output device being connected to the second gear; control mechanism by a second transmission member adapted to actuate the second control mechanism only when the output device is moved at the second speed. Thanks to these provisions, a simple seat is made to implement, ensuring optimal operational safety of the device, a simple maneuverability 20 for a user and increased comfort. In preferred embodiments of the invention, one and / or other of the following arrangements may also be used: one of the first and second control mechanisms is a guiding mechanism adapted to allow adjustment of the longitudinal position of the seat; the guiding mechanism comprises a slide having a first profile and a second section extending in a longitudinal direction and slidably mounted relative to one another 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 is rotatably mounted around an axis of rotation and moves in a first direction of rotation according to the first speed of rotation and in the first direction of rotation according to the second speed of rotation, the second speed rotation being greater than the first rotational speed; the output device comprises a toothed wheel connected to the actuating device, said toothed wheel is rotatable about an axis of rotation between an inactive position corresponding to the locked position of the first and second control mechanisms, and a position active wherein said gear actuates the first transmission member or the second transmission member, said gear wheel being elastically biased to the inactive position; - The gear wheel is rotatable about the axis of rotation between the inactive position and an intermediate position, located between the inactive position and the active position, wherein the first and second control mechanisms are still in the locked position; - The output device further comprises at least one pin rotated by the gear wheel about the axis of rotation and movable radially between a centered position in which said pin is in contact with the first transmission member when said gear wheel is in the active position, and an eccentric position in which said pin is in contact with the second transmission member when said gear is in the active position; said pin is elastically biased towards the centered position; The output device further comprises an elastic member adapted to maintain the pin in the centered position as long as said output device does not pivot at the second speed, said second speed being greater than a predetermined value; the first transmission member is a first driving cam rotatable about an axis of rotation between a rest position and an actuating position in which said first driving cam actuates the first control mechanism; the first driving cam comprises a transmission surface and the exit device pin cooperating with said transmission surface when the output gear gear moves in the first rotational direction according to the first gear; 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 driving cam actuates the second control mechanism; the second drive cam comprises a transmission surface and the pin of the output device cooperates with said transmission surface when the toothed wheel of the output device moves in the first direction of rotation according to the second speed; - 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 also relates to a method for adjusting the position of a seat as described above comprising at least one of the following steps: actuating the output device according to the first speed so as to authorize the first seat movement, 3037009 5 - actuate the output device according to the second speed so as to allow the second seat movement. 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 comprising an output device; FIGS. 3 and 4 are partial half-perspective views in perspective of the output device and first and second transmission members, 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. a sectional view of the output device, in the inactive position, and the first and second transmission members, in the rest position, along the sectional plane VI-VI of FIG. 5; FIG. 7 is a sectional view the output device, in intermediate position and the first transmission member, in the rest position, according to the sectional plane VII-VII of FIG. 5; FIG. 8 is a sectional view of the output device of FIG. 7, in the active position and of the first transmission member of FIG. 7, in the actuating position, FIG. 9 is a sectional view of the output device, in the intermediate position, and of the second transmission member, in the rest position, according to FIG. the section plane VIII-VIII of FIG. 5; FIG. 10 is a sectional view of an alternative output device of FIG. 6, in the inactive position, and first and second transmission members, in a position of rest. In the various figures, the same references designate identical or similar elements. In the description which follows, when reference is made to absolute position qualifiers, such as the terms 'forward', 'backward', 'up', 'down', 'left', 'right', etc., or relative, such as the terms 'above', 15 'below', 'above', 'below', etc., or with qualifiers for orientation, reference is made to a seat in a normal position of use of this one 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, FIG. 1 shows the seat 1 comprising a backrest 2 pivotally mounted around 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 3037009 7 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 provided with a locking device that prohibits said seat movement until said control mechanism is actuated. Usually, this actuation is done manually by a controller 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 9, the two control mechanisms are controlled by the same actuating device 22 (visible in FIG. 2), for example electrically controlled. The two actuating mechanisms actuable by the single actuating device 22 must be designed to be normally locked and to be 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 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 runners 30. The slideway 30 makes it possible to adjust, for example, the position P seat 1 relative to the fixed structure 6, including the floor of the vehicle, by sliding in the longitudinal direction X of the slide 30. The slideway 30 comprises a first section 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 each other in the longitudinal direction X. For example, the second profile 34 is assembled integral with a structural element of the seat 4. Similarly, , the first profile 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 profile 32, the guide mechanism 10 further comprises a first locking device 11. The first locking device 11 is movably mounted between a locking position and a locking device. unlock 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. unlocking position, the first locking device 11 allows the second section 34 to move relative to the first profile 32.

The first locking device 11 may be biased resiliently toward 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 resiliently 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 disk-shaped metal flange having as normal the pivot axis Y1. The second armature 26 is secured to a structural member of the backrest 2. For example, the second armature 26 may be formed by a disk-shaped metal flange having for normal 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) 20 providing easy rotation between the first armature 24 and the second armature 26. This rotation device is conventional and does not will not be described in more detail. The hinge mechanism 20 further comprises a second locking device 28 adapted to maintain 25 or to 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 suits 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 with respect 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 other type of structure blocking the rotation. This latch 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 have two so-called "stable" positions, such as, for example, the locking position and the unlocking position. . The guiding 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 actuator 22 may be an electric actuator and include an electric motor of any type or a piezoelectric actuator. The actuator 22 is adapted to move an output device 40 at either a first speed V1 or a second speed V2. The actuating device 22 can cause the output device 40 to rotate about an axis of rotation Y2. The axis of rotation Y2 may be perpendicular to the longitudinal direction X. The actuating device 22 is, for example, fixed on a crossmember 36 connecting the slideways 30, as shown in FIG. 2. However, in variants of FIG. embodiment, the actuating device 22 15 can be fixed on one of the slides 30. The output device 40 is housed in a closed housing 37. The housing 37 may be formed by the crossmember 36 and a fixed closure plate 38 fixed to said crossmember 36, for example by screws (not shown). The fixed closure plate 38 has an inner face 38a facing the outlet device 40 and an outer face 38b opposite to 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 output device 40 is connected to the guide mechanism 10 by a first transmission member 50, for example, adapted to actuate the guide mechanism 10 only when the output device 40 is moved at the first speed V1. The output device 40 is connected to the hinge mechanism 20 by a second transmission member 60, for example, adapted to actuate the hinge mechanism 20 only when the output device 10 is moved at the second speed V2. . More particularly, the first transmission member 50 drives the guiding mechanism 10 only when the output device 40 is moved in a first direction of rotation W1 about the axis of rotation Y2 to the first speed V1 and the second gear member transmission 60 causes the articulation mechanism 20 only when the output device 40 is moved in the first direction of rotation W1 around the axis of rotation Y2 at the second speed V2. The second speed V2 is greater than the first speed V1. For example, the speed V2 is at least twice as high as the first speed V1. However, in an alternative embodiment, the first transmission member 50 is adapted to actuate the guide mechanism 10 only when the output device 40 is moved at the second speed V2 and the second transmission member 60 is adapted to actuate the articulation mechanism 20 only when the output device 40 is moved at the first speed V1. 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 makes it possible to operate the output device 40 at the first speed V1 or at the second speed V2. Preferably, the actuating device 22 can be controlled by a first control member 8 which makes it possible to operate the output device 40 at the first speed V1 only and by a second control member (not shown) which makes it possible to operate operating the output device 40 at the second speed V2.

In this case, the output device 40 is actuated in a first angular range between an inactive position and an active position according to the first speed V1 or the second speed V2. When the output device 40 moves at the first speed V1, the output device 40 acts on one of the first and second locking devices 11, 28 to cause a displacement of said first or second locking device 11, 28 to the unlocking position, so as to release respectively the movement of the first armature 24 relative to the second armature 26 or the movement of the second section 34 relative to the first section 32. When the output device 40 moves to the second speed V2, the output device 40 acts on the other one of the first and second locking devices 11, 28 to cause a displacement of said first or second locking device 11, 28 towards the unlocking position, so releasing respectively the movement of the first armature 24 relative to the second armature 26 or the movement of the second section 34 relative to the The output device 40 thus makes it possible to transmit a movement of the actuating device 22 alternately to the guiding mechanism 10 and to the articulation mechanism 20. More particularly, the output device 40 makes it possible to transmit a movement of the actuating device 22 alternately to the guide mechanism 10 via the first transmission member 50 30 and the articulation mechanism 20 via the second transmission member 60. The first transmission member 50 is shown in FIG. Figures 3 to 9, movable in rotation about the axis of rotation Y2. The first transmission member 50 is, for example, a drive cam 50.

The first driving cam 50 is movable between a rest position in which it holds the first locking device 11 in the locking position so as to maintain the guiding mechanism 5 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 driving 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 may 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 20 intended to cooperate with the device. output 40 to transmit a motion to the first locking device 11 when the first driving cam 50 is moved in the first direction of rotation W1 from the home position to the actuating position.

In the example shown, the first drive cam 50 advantageously comprises two first portions 51 opposite to each other and two second portions 52 opposite one another. 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 35 shown in Figures 3 to 9, rotatable around the axis of rotation Y2. The second transmission member 60 is, for example, a second driving cam 60. The second driving cam 60 is movable between a resting position in which it holds the second locking device 28 in a locking position in such a manner that maintaining the hinge mechanism 20 in the locked position and an actuating position in which it drives the second locking device 28 to the unlocking position so as to actuate the hinge mechanism 20. The second hinge cam drive 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 cam. 60. More precisely, two recesses 63 may be provided. The recesses 63 ensure the continuity of the cam profile 20 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 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 intended to cooperate with the output device 40 to transmit motion to the second locking device 28 when the second driving cam 60 is moved into the first direction of rotation W1 from the rest position to the actuating position. More particularly, one of the recesses 63a of the upper part 66 may form a transmission surface S of the second drive 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 first direction of rotation W1 from the rest position to the actuating position 10 In the example shown, the second driving cam 60 advantageously comprises two opposite first portions 61 to one another and two second 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.

The output device 40 is in the example shown in Figures 3 to 9 rotatable about the axis of rotation Y2. The output device 40 moves in particular in the first direction of rotation W1 at the first speed V1 or at the second speed V2.

The output device 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 around the wheel. Y2 axis of rotation between an inactive position in which the guide mechanism 10 and the hinge mechanism 20 are in the locked position, and an active position in which said gear wheel 41 actuates the first transmission member 50 or the second member In particular, the toothed wheel 41 is rotatable about the axis of rotation Y2 between the inactive position and an intermediate position. The intermediate position is a position between the inactive position and the active position, and wherein said gear 41 leaves the guide mechanism 10 and the hinge mechanism 20 in the locked position. The toothed wheel 41 may be disc-shaped 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 toothed wheel 41 is interposed axially between the first transmission member 50 and the second transmission member 60. At least a portion of the outer edge 41c of the toothed wheel 41 comprises a shoulder 47. The shoulder 47 is extends between a first end 47a and a second end 47b. At least a portion of the shoulder 47 includes 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 The protrusion 47d is located substantially close to the first end 47a of the shoulder 47. The gear wheel 41 further comprises a collar 48, having a semi-circular shape, integral with said gear 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 defines with the shoulder 47 an inner zone adapted to receive the return spring 42.

The gear 41 further comprises at least one recess 49. The recess 49 has, for example, an oblong shape. Preferably, the toothed wheel 41 comprises two recesses 49 angularly distributed around the axis of rotation Y2.

The gear 41 includes a first guide 49a projecting from the inner face 41a of said gear 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 comprises a second guide 49b projecting from the outer face 41b of said toothed wheel 41. The second guide 49b may have a partially wedge-shaped shape, for example, the contour of a second end of the tooth. recess 49, opposite 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 can be secured in rotation about 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 30 to be in contact with one of the first and second transmission members 50, 60 when the toothed wheel 41 is in the intermediate position or in the active position. In the eccentric position, the pin 43 is adapted to be in contact with the other one of the first and second transmission members 50, 60 when the toothed wheel 41 is in the intermediate position or in the active position. The inner face 38a of the fixed closure plate 38 comprises at least one inclined ramp 70 adapted to guide the at least one pin 43 between the centered position and the eccentric position. Preferably, the inner face 38a of the fixed closing plate 38 comprises a ramp 70 for each pin 43. The inner face of the crosspiece 36 may further comprise at least one inclined ramp opposite the at least one inclined ramp of the internal face 38a of the fixed closing plate 38. Alternatively, only the inner face of the crosspiece 36 comprises at least one inclined ramp. The pin 43 is biased towards the eccentric position by its mass and towards the positon centered by the at least one ramp 70. Preferably, the output device 40 may alternately comprise an elastic member 44. The pin 43 is resiliently biased towards the position centered by the elastic member 44. The elastic member 44 may be a spring. The spring 44 includes 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 spring 44 has a stiffness k adapted to maintain each of the pins 43 in a centered position as long as each of said pins 43 does not exert against the spring 44 a force F greater than a predetermined value. The force F exerted by the pins 43 varies according to the speed of rotation of the toothed wheel 41.

When the gear wheel 41 pivots at the first speed V1, each of the pins 43 exerts a first force F1 insufficient to cause the deflection of the spring 44 and therefore to counteract the elastic biasing of the spring 44. Each of the pins 43 is kept in the centered position. When the gear 41 pivots at the second speed V2, each of the pins 43 exerts a second force F2 greater than the first force F1. The second force F2 is sufficient to cause the spring 44 to deflect and thus to defeat the resilient bias of the spring 44. Each of the pins 43 moves to the eccentric position. The return spring 42 is for example a helical spring having a cylindrical spiral body 42a 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 spiral body 42a 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 bear 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 both 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 intermediate position, or to the active position, causes a twisting of the return spring 42. More particularly, said displacement the first end 42b, or the second end 42c, of the return spring 42 abuts against the first end 39a of the rib 39 of the fixed closure plate 38, or against the protrusion 39c of 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 active position, or the intermediate position, to the inactive position. The actuating device 22 may comprise an actuating rod (not shown) rotatable and the transmission wheel 23b directly assembled on the actuating rod. The transmission wheel 23b is rotatable about a transmission axis (which in this case is parallel to the axis of rotation Y2). The external toothing 23c, belonging to the transmission wheel 23b, is adapted to mesh with 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 supply, a springback 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 force on the toothed wheel 41.

In an alternative embodiment, the actuating device 22 and the transmission wheel 23b may 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 to the active position and when the actuating rod is actuated in the second direction of rotation it can, for example, 3037009 drive the gear wheel 41 in a second direction of rotation W2, opposite the first direction of rotation W1, to the inactive position. In this 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 the first locking device 11 or the second device 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 via the control member 8, to actuate the output device 40 in the first direction of rotation 15 W1 around the axis of rotation Y2 at the first speed V1 or at the second speed V2 and thus allow the unlocking of the guide mechanism 10 (and thus the displacement of the second section 34 relative to the first section 32), ie the release of the 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 relative to the seat 4. The displacement of the second section 34 relative to the first section 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 30 in the longitudinal direction X, it actuates the first control member 8. The actuating device 22 then rotates in the first direction of rotation W1 the toothed wheel 41 from the inactive position (FIG. 6) to the intermediate position at the first speed V1 (FIG. Figure 35 7). The pins 43 then exert the first force F1, 3037009 23 insufficient, against the elastic bias of the elastic member 44 and said pins 43 are maintained in their centered position. Alternatively, the output device 40 does not comprise an elastic member 44 and said pins 43 are held in a centered position by their mass. Each of the pins 43 is then in contact with the transmission surface S of the recesses 53 of the first drive cam 50. Then, the actuating device 22 moves in rotation in the first direction of rotation W1 the toothed wheel 41 of the intermediate position (Figure 7) to the active position (Figure 8). The pins 43 then move said first driving cam 50, without moving the second driving cam 60, from the rest position (FIG. 7) to the actuating position (FIG. 8) in which it drives the first device 11 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 then moves in rotation in the first direction of rotation W1 the toothed wheel 41 from the inactive position (FIG. 6) to the intermediate position at the second speed V2 (FIG. 9). The pins 43 then exert the second force F2, greater than the predetermined value, against the elastic biasing of the elastic member 44. Said second force F2 is sufficient to elastically deform the elastic member 44 and said pins 43 move to their off-center position. Alternatively, the output device 40 does not comprise an elastic member 44 and the movement of the toothed wheel 41 in the first direction of rotation W1 at the second speed V2 causes the displacement of each of the 35 pins 43 along the ramp 70 (Figure 10), or 3037009 24 alternately ramps 70. The pins 43 slide along the ramp 70, thus moving from the centered position to the eccentric position. Each of the pins 43 is then in contact with the transmission surface S of the recesses 63 of the second driving cam 60. Then, the actuating device 22 rotates in the first direction of rotation W1 the toothed wheel 41 of the intermediate position (Figure 9) to the active position. The pins 43 then move said second drive cam 60, without moving the first drive cam 50, from the rest position (FIG. 9) to the operating position in which it drives the second locking device 28 towards the unlocking position so as to actuate the articulation mechanism 20. In a second step, the user releases the control member 8 and the output device 40 elastically returns to the inactive position, blocking the guiding mechanism 10 and the articulation mechanism 20.

Alternatively, when the output device does not comprise an elastic member 44, the movement of the toothed wheel 41 in the second direction of rotation W2, in order to return to the inactive position, causes the movement of each of the pins 43 along. of the ramp 70, 25 or alternatively ramps 70. The pins 43 slide along the ramp 70, thus moving from the eccentric position to the centered position.

Claims (10)

REVENDICATIONS1. Vehicle seat (1) comprising: - a seat (14), - a backrest (12) pivotally mounted on the seat (14), - a first control mechanism (10; 20) normally in a locked position and operable for allowing a first seat movement, - a second control mechanism (10; 20) normally in a locked position and operable to allow a second seat movement, and - an actuating device (22), unique, characterized in that the seat (1) further comprises - an output device (40) actuated by the actuating device (22) at either a first speed (V1) or a second speed (V2), the output device (40) ) being connected to the first control mechanism (10; 20) by a first transmission member (50) adapted to actuate the first control mechanism only when the output device is moved at the first speed (V1), the output device (40) being connected to the second mechanism control unit (10; 20) by a second transmission member (60) adapted to actuate the second control mechanism only when the output device is moved at the second speed (V2). Seat (1) according to claim 1, wherein one of the first and second control mechanisms (10; 20) is a guiding 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 of the first and second control mechanisms is a hinge mechanism adapted to allow adjustment of the angular position of the backrest. (12) relative to the seat (14). 5 The seat according to any one of the preceding claims, wherein the output device (40) is rotatably mounted about an axis of rotation (Y2) and moves in a first direction of rotation (W1) according to the first speed (V1) of rotation and in the first 10 direction of rotation (W1) according to the second speed (V2) of rotation, the second speed of rotation (V2) being greater than the first speed of rotation (V1). Seat according to any one of the preceding claims, wherein the output device (40) comprises a toothed wheel (41) connected to the actuating device (22), said toothed wheel (41) is rotatable about an axis of rotation (Y2) between an inactive position corresponding to the locked position of the first and second control mechanisms (10; 20), and an active position in which said gear wheel actuates the first transmission member (50). or the second transmission member (60), said toothed wheel being elastically biased towards the inactive position. 25 6. Seat according to claim 5, wherein the output device (40) further comprises at least one pin (43) rotated by the toothed wheel (41) about the axis of rotation (Y2) and radially movable between a centered position in which said pin is in contact with the first transmission member (50) when said toothed wheel is in the active position, and an eccentric position in which said pin is in contact with the second transmission member (60) when said gear is in the active position. 3037009 27 The seat of claim 6, wherein the output device (40) further comprises a resilient member (42) adapted to hold the pin (43) in the centered position as long as said output device is not rotated at the second speed (V2), said second speed being greater than a predetermined value. 8. Seat according to any one of the preceding claims, wherein the first transmission member (50) is a first drive cam movable in rotation about an axis of rotation (Y2) between a rest position and a actuating position in which said first driving cam actuates the first control mechanism (10; 20). The seat according to any one of the preceding claims, wherein the second transmission member (60) is a second movable drive cam rotatably about an axis of rotation (Y2) between a home position and a home position. actuating position in which said second driving cam actuates the second control mechanism (10; 20). 25 Method for adjusting the position of a seat (1) according to any one of the preceding claims comprising at least one of the following steps: - operating the output device (40) according to the first speed (V1) so to allow the first seat movement, - actuate the output device (40) at the second speed (V2) so as to allow the second seat movement.