FR3037877A1 - VEHICLE SEAT COMPRISING AN ANCHOR MECHANISM - Google Patents

Abstract

Vehicle seat (1) comprising a seat frame (7) and an anchoring mechanism (10), the anchoring mechanism (10) comprising an anchoring element (13) movably mounted between: - a locked position in wherein the seat frame (7) is fixed at least in rotation with respect to a fixed structure (4) of the vehicle, and - an unlocked position in which the seat frame (7) is free to tilt around a tilting axis (Y1) in a transverse direction (Y) with respect to the fixed structure (4), characterized in that the anchoring mechanism (10) further comprises a biasing member (17), the biasing means (17) being adapted to urge the anchor member (13) in a release direction (D) as the anchor member (13) moves from the locked position to the unlocked position.

Description

The present invention relates to a vehicle seat comprising an anchoring mechanism.

More particularly, the invention relates to a vehicle seat comprising a seat frame and an anchoring mechanism, the anchoring mechanism comprising an anchoring element mounted movably between: - a locked position in which the seat frame is stationary at least in rotation relative to a fixed structure of the vehicle, and - an unlocked position in which the seat frame is free to tilt about a tilting axis in a direction transverse to the fixed structure.

In vehicles, particularly in vehicles with three doors, there are known such anchoring mechanisms, comprising for example a hook that can be alternately engaged or disengaged with a rod connected to the fixed structure of the vehicle. A user can thus block or allow the tilting of the seat forward to facilitate access to the seats behind the seat.

However, when a vehicle collision or shock occurs, the seat frame may be deformed. This deformation of the armature may cause a malfunction of the anchoring mechanism, and in particular prevent the anchoring element from moving from the locked position to the unlocked position. The anchoring element may for example remain stuck in contact with the rod. The user occupying a place behind the seat can not then tilt the seat forward and therefore can not get out of the vehicle easily and quickly, especially in case of emergency.

The present invention is intended to overcome such a disadvantage. To this end, in order to overcome the aforementioned problem, in accordance with the invention, the anchoring mechanism further comprises a biasing member, the biasing member being adapted to urge the anchoring element in a direction of release when the anchor moves from the locked position to the unlocked position. Due to this additional bias in the release direction, the hook may be moved away from the rod and pivoted into the unlocked position. Thus, there is provided an anchoring mechanism that can operate even when the armature of the seat has been previously deformed during an impact or collision of the vehicle. Such an anchoring mechanism also makes it possible to comply with standards and regulations relating to seat anchorages, in particular the ECE R14 standard ("Uniform provisions concerning the approval of vehicles with regard to seat belt anchorages, isofix anchorage systems and isofix upper attachment anchors ").

In various embodiments of the seat according to the present invention, one and / or other of the following arrangements may optionally be furthermore employed: the anchoring element is rotatably mounted around a unlocking axis in a direction transverse between the locked position and the unlocked position; The anchoring element comprises a cam profile in contact with the biasing member, the rotation of the anchoring member causing a force on the anchoring member in the release direction; the seat further comprises a retaining element connected to the fixed structure of the vehicle and adapted to engage with the anchoring element in the locked position; the seat comprises a slide system adapted to allow movement of the seat in a longitudinal direction, the retainer being fixedly and rigidly mounted on the slide system; the anchoring element is a hook comprising a bent end, the retaining element being a pedestal comprising a rod, the hook being adapted to engage with the rod in the locked position; The hook is moved relative to the rod in the release direction as the hook passes between the locked position and the unlocked position; - The seat further comprises a spreader, the spreader being adapted to be actuated by an occupant to allow the passage of the anchoring element between the locked position and the unlocked position; the spreader comprises a wire passing through a first opening of the anchoring element comprising a first end and a second end, the wire passing from the first end of the first opening in the locked position to the second end of the first opening in position unlocked; The biasing member is a fixed part in permanent contact with the anchoring element; and the anchoring member is movably mounted about a pivot member along an unlocking axis, the pivot member passing through a second opening of the anchoring member, the second opening having a larger size than the cross section. of the pivot in the transverse direction. Of course, the various features, variations and / or embodiments of the present invention may be associated with each other in various combinations to the extent that they are not incompatible or exclusive of each other. The present invention will be better understood and other characteristics and advantages will become apparent on reading the following detailed description comprising embodiments given by way of illustration with reference to the appended figures, presented by way of non-limiting examples, which may be used to complete the understanding of the present invention and the disclosure of its realization and, where appropriate, contribute to its definition, in which: - Figure 1 is a schematic view of a vehicle seat according to an embodiment of the present invention; Figure 2 is a rear view of the seat frame of Figure 1; - Figure 3 is a perspective of the frame of the seat of Figure 2; FIG. 3A is an enlarged view of the anchoring mechanism of FIG. 3; FIG. 4 is a view of the anchoring mechanism according to section plane IV-IV of FIG. 2 in which the anchoring mechanism is in the locked position; - Figure 5 is a view of the anchoring mechanism according to the V-V section plane of Figure 2 wherein the anchoring mechanism is in the locked position; FIG. 6 is a view of the anchoring mechanism of FIG. 2 in the locked position when the seat frame has been deformed, for example after an impact or collision of the vehicle; - Figure 7 is a view of the anchoring mechanism of Figure 6 in the unlocked position; and FIG. 8 is a view of the anchoring mechanism according to section plane VIII-VIII of FIG. 2 in which the anchoring mechanism is in the locked position. It should be noted that, in the figures, the structural and / or functional elements common to the various embodiments may have the same references. Thus, unless otherwise stated, such elements have identical structural, dimensional and material properties. In the following description, when referring to absolute position qualifiers (such as the terms "forward", "backward", "up", "down", "left", "right", etc.) relative position (such as "above", "below", "upper", "lower", etc.) or orientation (such as "vertical", "horizontal", etc.) , it refers to a seat in a normal position of use thereof in the direction of ordinary progression of the vehicle.

Unless otherwise specified, the terms "approximately", "substantially", "about", "of the order of", etc. mean that a slight variation from the nominal value considered is possible, especially a low percentage, in particular within 10%.

Figure 1 is a schematic view of a seat 1, particularly a motor vehicle seat, according to one embodiment of the present invention. Thus, FIG. 1 depicts the seat 1 comprising a backrest 2 and a seat 3 fixed to a fixed structure 4 of the vehicle, in particular to the floor of the vehicle. The seat 2 can be connected to the fixed structure 4, in particular to the floor 4, by a system 5 of slides 5, comprising one or more slides 6, extending in a longitudinal direction X. In particular, a single slide 6 is 1. In a particular embodiment as shown in Figures 2 and 3, the slide system 5 comprises in particular a first slide 6a, a second slide 6b and a third slide 6c, advantageously parallel to each other. . According to this embodiment, the first and second slides 6a, 6b are in particular located respectively on the lateral sides of the seat 1 while the third slide 6c is located between the first slide 6a and the second slide 6b. Alternatively, in other embodiments, the slide system 5 may comprise one or two slides 6, or more than three slides 6. The slide system 5, and in particular the slide or slides 6, can be used to adjust the slide. position of the seat 1 relative to the fixed structure 4 of the vehicle in the longitudinal direction X. As shown in Figure 1, the rails 6 comprise a first section 11 and a second section 12 extending in the longitudinal direction X The first profile 11 is secured to the fixed structure 4, in particular to the floor 4 of the vehicle, while the second section 12 is secured to the seat 2 of the seat 1. The first section 11 and the second section 12 are slidably mounted. One such slide system 5 is known per se and will not be described in more detail. Moreover, a transverse direction Y is defined as being perpendicular to the longitudinal direction X. More specifically, the transverse direction Y and the longitudinal direction X may for example belong substantially to a horizontal plane of extension of the fixed structure 4. especially at the floor of the vehicle.

The seat 1 further comprises a seat frame 7 carrying the lining (not shown in Figures 2 to 7) of the seat 1. As shown in Figures 2 and 3 which are rear views and in perspective of the seat frame 7, the seat frame 7 is connected to the fixed structure 4. In the embodiment shown in the figures, the seat frame 7 is in particular fixed to the fixed structure 4 via 5. The seat frame 7 is capable of tilting with respect to the fixed structure 4 of the vehicle around the transverse direction Y. The seat 1 can thus pass between: a blocked state in which the reinforcement seat 7 is mounted rigidly on the slide system 5. In this locked state, the seat 1 is in the normal position of use, the seat 3 being in particular substantially parallel to the fixed structure 4, and particularly to the floor of the vehicle e. However, in this locked state, the seat 1 remains free to slide relative to the fixed structure 4 by means of the slideway system 5. Furthermore, the backrest 2 also remains free to pivot with respect to the seat 3, by example by means of a folder tilt adjustment mechanism 2 which is known per se and which will not be described below in more detail; a tilting state in which the seat frame 7 is free to swing around the transverse direction Y. In this tilting state, both the seat 3 and the backrest 2 swing relative to the fixed structure 4. For this purpose, the seat frame 7 is for example mounted on the slide system 5 at a front end 7a by a rod 8 which can advantageously pivot relative to the fixed structure 4, in particular with respect to the slide system 5 around a tilting axis Y1. Thus, the seat 1 can swing by pivoting forwards and / or backwards around the tilting axis Y1. The seat 1 may further comprise at least one removable attachment 9 (also called "ballfix") at a rear end 7b. The removable attachment 9 is then unlocked to allow the tilting of the seat 1, and in particular of the seat frame 7, relative to the fixed structure 4 of the vehicle. In particular, according to the embodiment shown in Figure 2, the seat frame 7 comprises two removable fasteners 9, respectively fixed to the first slide 6a and the second slide 6b.

The seat 1 further comprises at least one anchoring mechanism 10, especially at the rear end 7b, alternatively to prevent or allow a tilting of the seat frame 7 about the tilting axis yl. In the embodiment shown in the figures, the anchoring mechanism 10 is more particularly mounted at the third slide 6c. The anchoring mechanism 10 may be mounted alternately at the first slide 6a or the second slide 6b. The anchoring mechanism can also be directly mounted at the fixed structure 4 in an embodiment where the seat 1 does not include a slide system 5.

The anchoring mechanism 10 comprises an anchoring element 13. According to the embodiment shown in the figures, the anchoring element 13 may in particular consist of a hook. The hook 13 may for example be metal, overmolded by a plastic material. However, this embodiment is not limiting and other forms of anchoring elements can also be realized. The seat 1 also comprises a retaining element 21. The retaining element is for example a base 21 connected to the fixed structure 4, in particular fixed and rigidly mounted on the slide system 5. Preferably, the base 21 is mounted on the third 2 5 slide 6c, especially on the second section 12 of the third slide 6c. The base 21 is, for example, mounted or fixed on the second section 12 by riveting, screwing, welding or other fastening means. As shown in FIG. 3A, the base 21 has a U-shape. More specifically, the base 21 comprises two lateral walls 21a interconnected by a common base 21b. In addition, the base 21 comprises a rod 22 (also called "antiburst axis") 3037877 8 interconnecting the two side walls 21a. In particular, the rod 22 extends in the transverse direction Y. According to the embodiment shown in the figures, the anchoring element 13 is rotatably mounted around an unlocking axis Y2 in the transverse direction Y More specifically, the anchoring element 13 comprises an end 13a around the unlocking axis Y2, for example around a pivot member 19. Thus, the anchoring element 13 is movably mounted between a locked position and an unlocked position.

In the locked position, the anchoring element 13 immobilizes the seat 1 and the seat frame 7 in the locked state. The anchoring element 13 is then capable of being engaged with the retaining element 21. In particular, according to the illustrated embodiment in which the anchoring element 13 is a hook, the latter is capable of engage, particularly via a curved end 13c, with the rod 22 of the base 21. Therefore the seat 1, and in particular the seat frame 7, is stationary, in particular in rotation, relative to the fixed structure 4 of the vehicle. In the unlocked position, the anchoring element 13 allows the seat frame 7 to 20 to be in the tilting state. Thus, the seat 1, and in particular the seat frame 7, can swing forward around the transverse direction Y relative to the fixed structure 4 of the vehicle. A return member 14, shown in Figure 8 allows recall, including elastically, the anchoring element 13 in the locked position from the unlocked position. The return member 14 is in particular fixed by one end 14a to the hook 13, as shown in FIGS. 5 and 8. The return member 14 is in particular also fixed by another end 14b to the biasing member 17. 5 to move from the locked position to the unlocked position, the anchoring element 13 can be rotated by an occupant by means of a spreader 15, for example accessible from the back of seat 1.

The rudder 15 is advantageously rotatably mounted on the seat frame 7 about an axis of rotation Y3 in the transverse direction Y. Thus, when an occupant raises the rudder 15, upwards, the movement of the rudder 15 is transmitted to the anchoring element 13. The anchoring element 13 then rotates clockwise about the unlocking axis Y2, upwards, to disengage from the retaining element 21 so that the seat frame 7 can be in the tilting state. More specifically, the anchoring element 13 has a first opening 16, in particular of elongate shape extending between a first end 16a and a second end 16b, having for example an oblong or oval shape. A wire 15a of the crossbar 15 passes through the first opening 16 of the anchoring element 13. The wire 15a is at the first end 16a of the first opening 16 when the anchoring element 13 is in the locked position As is seen in FIGS. 4 and 5. When the lifter 15 is raised by an occupant, the yoke yarn 15a rotates the anchoring member 13 at the first opening 16 to rotate the yoke. anchoring element 13 around the unlocking axis Y2. In particular, raising the rudder causes gradual passage of the wire 15a from the first end 16a to the second end 16b of the first opening 16, as shown in Figure 7.

In addition, the raising of the spreader 15 also unlocks the removable attachment (s) 9 via transverse threads 15b of the crossbar 15. The removable fasteners 9 are unlocked in particular before the anchoring element 13 is completely in position. the unlocked position.

When the vehicle is impacted or collided, in particular frontal, the frame of the seat 7 may be deformed. In particular, the seat frame 7 can be moved, in particular upwards, relative to the fixed structure 4 and the slide system 5. More particularly, the anchoring element 13 and the spreader 15 are moved together 3 0 up. The slides 6 and the retaining element 21 are not displaced and therefore remain in their initial positions.

As a result of this deformation, the anchoring element 13, in particular the hook, is displaced relative to the retaining element 21, in particular the rod 22, as shown in FIG. 6. More precisely, the hook 13, in particular the curved end 13c, can then come into abutment with the rod 22. When an occupant actuates the spreader 15, the hook 13 can no longer disengage from the rod 22 by simply pivoting in a circular path (shown in FIG. in dotted line in Figure 6) around the unlocking axis Y2. The occupant can not pass the seat 1 in the tilting state, which prevents any emergency exit.

Thus, according to the invention, the anchoring mechanism 10 also comprises a biasing member 17. As shown in the embodiment of FIGS. 4 to 7, the biasing member 17 (also referred to as a "loop loop yoke") ) may consist of a piece 15 fixed relative to the seat frame 7, the biasing member 17 being generally a metal piece. The biasing member 17 preferably extends horizontally in the longitudinal direction X. However, this embodiment is not limiting and variants of different biasing members 17 may also be used.

The biasing member 17 comprises an end 17a abutting with the end 13a of the anchoring element 13. The biasing member 17 is thus in contact, in particular permanent punctual, with the anchoring element 13. The return member 14 holds the end 13a of the anchoring element 13 in abutment with the biasing member 17. According to the embodiment shown, the end 13a also comprises a second opening 18. second opening 18 may especially be circular or oval. In particular, the pivot member 19 passes through the second opening 18 of the end 13a of the anchoring element 13. The anchoring element 13 can thus pivot about the pivot member 19 in the transverse direction Y As shown in FIGS. 4 to 7, the second opening 18 is larger in size than the cross section of the pivot member 19 in the transverse direction. In other words, the pivot element 19 does not occupy all of the second opening 18. The biasing member 17 makes it possible to urge the anchoring element 13 in a release direction D when the anchoring element 13 rotates around the unlocking axis Y2. More specifically, the anchoring element 13 is an eccentric. The end 13a of the anchoring element 13 thus comprises a cam profile as shown more precisely in FIGS. 4 to 8. The cam profile has, for example, an end in the form of an angle 24, in particular rounded. Thus, when an occupant actuates the spreader 15, the anchoring element 13 pivots, for example clockwise, around the locking axis Y2. Due to the cam profile of the end of the anchoring element 13a, the end 17a of the biasing member 17 exerts a force on the anchoring element 13 in the direction of release D, in particular down. Thus, when the anchoring element 13 pivots, the cam shape, in particular the angle shape 24 of the end 13a, allows the disengagement of the anchoring element 13.

The anchoring element 13 is thus displaced with respect to the seat frame 7, in particular with respect to the pivot element 19. More particularly, the pivot element 19 moves inside the second opening 18 of the anchoring element 13.

The anchoring element 13 is moved relative to the retaining element 21. According to the embodiment shown, the hook 13 is no longer in abutment with the rod 22 but is spaced apart from the rod 22. to disengage the hook 13 from the rod 22. By continuing to actuate the spreader 15, the occupant can thus rotate the hook 13 in the unlocked position to pass the seat 1 in the tilting state.

In the event of a collision, the seat 1 can thus be tilted in order to allow an emergency exit of the occupant. It is thus possible to comply with the ECE R14 standard ("Uniform provisions concerning the approval of vehicles with regard to seat belt anchorages, isofix anchorages and isofix upper anchorages"). Of course, the invention is not limited to the embodiments described above and provided solely by way of example. It encompasses various modifications, alternative forms and other variants that may be considered by those skilled in the art within the scope of the present invention and in particular any combination of the different modes of operation described above, which can be taken separately or in combination.

Claims (10)

REVENDICATIONS1. Vehicle seat (1) comprising a seat frame (7) and an anchoring mechanism (10), the anchoring mechanism (10) comprising an anchoring element (13) movably mounted between: - a locked position in the seat armature (7) is immobile at least in rotation with respect to a fixed structure (4) of the vehicle, and - an unlocked position in which the seat frame (7) is free to tilt around a tilting axis (Y1) in a transverse direction (Y) with respect to the fixed structure (4), characterized in that the anchoring mechanism (10) further comprises a biasing member (17), the biasing means (17) being adapted to urge the anchor member (13) in a release direction (D) as the anchor member (13) moves from the locked position to the unlocked position. 2. Seat (1) according to the preceding claim, wherein the anchoring element (13) is rotatably mounted around a pivot member (19) according to an unlocking axis (Y2), the pivot element ( 19) passing through a second opening (18) of the anchor member (13), the second opening (18) having a larger size than the cross section of the pivot member (19) in the transverse direction (Y) . Seat (1) according to claim 2, wherein the anchoring element (13) comprises a cam profile in contact with the biasing member (17), the rotation of the anchoring element (13). ) causing a force of the biasing member (17) on the anchoring element (13) in the release direction (D). The seat (1) according to any one of the preceding claims, further comprising a retaining element (21) connected to the fixed structure (4) of the vehicle 30 and adapted to engage with the anchoring element (13) in the locked position. Seat (1) according to claim 4, comprising a slide system (5) adapted to allow movement of the seat (1) in a longitudinal direction (X), the retaining element (21) being mounted in fixed and rigid way on the slide system (5). 6. Seat (1) according to claim 4 or 5, wherein the anchoring element 5 (13) is a hook, the retaining element (21) being a base comprising a rod (22), the hook being adapted to engage with the rod (22) in the locked position. The seat (1) according to claim 6, wherein the hook (13) is moved relative to the rod (22) in the release direction (D) as the anchor member (13) moves from the position locked in the unlocked position. 8. Seat (1) according to any one of the preceding claims, further comprising a spreader (15), the spreader (15) being adapted to be actuated by an occupant to allow the passage of the anchoring element (13). ) between the locked position and the unlocked position. The seat (1) according to claim 8, wherein the lifter (15) comprises a wire (15a) passing through a first opening (16) of the anchor member (13) having a first end (16a) and a second end (16b), the wire (15a) passing from the first end (16a) of the first opening (16) in the locked position to the second end (16b) of the first opening (16) in the unlocked position. Seat (1) according to any one of the claims, wherein the biasing member (17) is a fixed part on the seat frame (7) in permanent contact with the anchoring element ( 13).