Adjustable anchoring catch for motor vehicle rear backrest

Abstract

The invention relates to a motor vehicle structure (12) comprising: a support (28) with a receiving surface (30); an anchoring catch (42) comprising a fixing plate (44) with a contact surface, an anchoring bracket (46) anchored to a rear backrest; and a position adjustment interface (48). At the adjustment interface (48), the structure comprises first positioning orifices (34), and positioning pins (50) in the first positioning orifices (34) for positioning the fixing plate relative to the support (28) in a first position. The structure (12) further comprises second positioning orifices (36) at a distance from the positioning pins (50); the second positioning orifices (36) being able to receive the positioning pins (50) in order to position the fixing plate (44) in a second position.

Description

Description Title of the invention: Adjustable anchor latch for rear seat back of motor vehicle

[0001] The present invention claims priority from French application 2410591 filed on October 2, 2024, the content of which (text, drawings, and claims) is incorporated herein by reference. The invention relates to the modular nature of a motor vehicle structure. The invention concerns the anchoring of retractable seatbacks to the rear seats of a motor vehicle. The invention relates to a structure with an anchoring latch for a rear seatback of a motor vehicle. The invention also relates to a motor vehicle.

[0002] A motor vehicle has several seating positions. Typically, a motor vehicle's passenger compartment has two rows of seats: a front row and a rear row. In the rear row, the seats are formed by a continuous bench seat, the backrest of which is also continuous transversely.

[0003] A cargo compartment is typically located behind the passenger compartment. The rear seatbacks separate the passenger compartment from the cargo area, also known as the trunk. To increase the vehicle's cargo capacity, these rear seatbacks are pivotally mounted on the frame. They can therefore move between a horizontally folded position and an upright position, usually vertical.

[0004] For safety reasons, the seatbacks are locked when in the upright position. This prevents the seatbacks from folding down on passengers in the event of a rear-end collision or due to cargo in the trunk. To this end, the vehicle features an anchoring system with a latch attached to the frame and a bolt attached to the seatback that engages with the latch. Therefore, when folded down, the rear face of the seatbacks remains flat.

[0005] Document FR3041294A1 discloses a two-position locking device for a vehicle seat back that folds down along a transverse pivot axis. The device comprises a lock attached to the seat back and a strike plate attached to the vehicle's structure. It also includes a hook designed to engage with a bolt of the lock to secure the seat back to the structure. The strike plate, while remaining engaged with the lock, is capable of sliding in a support fixed to the structure along an arc-shaped travel centered on the pivot axis. The device further comprises means for locking comprising a locking member movablely mounted on said support between a locking position in which it is engaged with said strike plate and an unlocking position in which it is away from said strike plate.

[0006] To improve the comfort of rear passengers, it is useful to be able to adjust the angle of the seatbacks when they are upright.

[0007] Document FR3089897A1 describes a rear wheel arch reinforcement adaptable to a fixed or adjustable anchor point for a rear seat backrest. The motor vehicle comprises: a rear wheel arch; a rear fender liner; a rear wheel arch reinforcement attached to said arch and to the rear fender liner, and serving as a support for a rear seat backrest; and an anchor point for a rear seat backrest, mounted on the rear wheel arch reinforcement. The rear wheel arch reinforcement includes a side panel adapted to receive the anchor point when said point is of the adjustable type, and a front panel with at least one recess adjacent to the side panel, adapted to receive the anchor point when said point is of the fixed type. The reinforcement is attached to the extension of the reinforcement by its lower portion and by the side panel's mounting tab, using fasteners positioned in holes.These fasteners are of the screw-nut type.

[0008] Document DE102017222687B4 describes an adjustable latch assembly for a vehicle seat, comprising: a base adapted for attachment to a vehicle body; a guide fixed to the base for translation and having a pair of internally formed notches; a striker fixed to the guide; and a locking mechanism for locking the striker in a position relative to the base. The base comprises two spaced plates between which the guide is received. The base plates have guide grooves, and the guide has bushings that engage in these grooves.

[0009] A range of motor vehicles comprises different models with distinct geometries. In particular, these different models feature different geometries for their rear seat anchoring systems. However, the proliferation of anchoring system geometries directly multiplies the ranges of parts that need to be designed, produced, and stored. Producing different anchoring system models runs counter to the economies of scale sought in the automotive industry. Therefore, there is a need to be able to manufacture different anchoring systems while reducing the number of parts. There is also a need to improve the robustness of the anchoring system for a retractable rear seat.

[0010] The invention aims to address at least one of the problems or drawbacks encountered in the prior art. In particular, the invention aims to provide an adaptable anchoring system for the rear seat back of a motor vehicle. The invention also aims to optimize modularity, the cost, resistance of an adjustable anchoring system for rear seat of motor vehicle.

[0011] According to a first aspect, the invention proposes a motor vehicle structure, the structure comprising: a support with a receiving surface; an anchoring strike plate comprising a fixing plate with a contact surface against the receiving surface, an anchoring bracket projecting on the fixing plate and intended to be anchored to a rear backrest of a motor vehicle; the receiving surface and the contact surface forming a position adjustment interface; at the adjustment interface, the structure comprises first positioning holes, positioning pins in the first positioning holes, in order to position the fixing plate relative to the support in a first position; remarkable in that at the adjustment interface, the structure further comprises second positioning holes at a distance from the positioning pins;the second positioning holes being suitable for receiving the positioning pins in order to position the mounting plate in a second position.

[0012] Therefore, using the same anchoring plate and the same support with multiple sets of positioning holes, it is possible to offer different backrest anchoring configurations. These parts are usable in different vehicle models, allowing for economies of scale and simplified product ranges.

[0013] Preferably, the positioning pawns include at least one oblong positioning pawn.

[0014] Preferably, the positioning pins include recesses; preferably, the second positioning holes are identical to the first positioning holes.

[0015] Preferably, the positioning pawns include an upper positioning pawn and a lower positioning pawn.

[0016] Preferably, the anchoring bracket includes a rod fixed to the fixing plate, the rod is vertically at the level of the upper positioning pin and / or longitudinally at the level of the lower positioning pin.

[0017] Preferably, the first positioning ports and the second positioning ports each comprise a top port and a bottom port larger than the top port.

[0018] Preferably, the support comprises an upper portion with the upper holes, a lower portion with the lower holes; the lower portion being transversely inwards relative to the upper portion.

[0019] Preferably, the support comprises a first layer, the mounting plate comprises a second layer greater than the first layer; preferably, the first positioning holes and the second Positioning holes are formed on the support, and the positioning pins are fixed to the mounting plate.

[0020] Preferably, the second positioning holes are offset longitudinally relative to the first positioning holes.

[0021] Preferably, the second positioning holes and the first positioning holes are offset by a distance of between 15 mm and 50 mm.

[0022] Preferably, the first positioning holes and the second positioning holes define a polygon; the structure further includes a first weld point in said polygon.

[0023] Preferably, the structure includes a second weld point, a third weld point which are outside the polygon.

[0024] Preferably, the structure includes an external wall formed by the support.

[0025] Preferably, the support is an external support.

[0026] Preferably, the adjustment interface is vertical.

[0027] Preferably, the adjustment interface is a cross interface.

[0028] Preferably, the adjustment interface includes means for fastening.

[0029] Preferably, the polygon is a quadrilateral.

[0030] Preferably, the polygon is vertically between the second weld point and the third weld point.

[0031] Preferably, the mounting plate includes a contour line, the second positioning holes include a front hole cut by the contour line, a rear hole cut by the contour line.

[0032] Preferably, the first positioning holes include internal contours fitted to the positioning pins.

[0033] Preferably, the second positioning holes are free of positioning pins.

[0034] Preferably, the second positioning holes and the first positioning holes are offset by a distance of between 20 mm and 40 mm.

[0035] Preferably, the positioning pins are offset vertically and / or longitudinally.

[0036] Preferably, the positioning pins are tubular.

[0037] Preferably, the second position is at a distance from the first position.

[0038] According to another aspect, the invention proposes a motor vehicle structure, the structure comprising: a support with a receiving surface; an anchoring strike plate comprising a fixing plate with a contact surface against the receiving surface, an anchoring bracket projecting from the fixing plate and intended to be anchored to a rear seat back of a motor vehicle; the receiving surface and the contact surface defining an interface Position adjustment; at the adjustment interface, the structure includes first positioning holes and positioning pins; notable in that at the adjustment interface, the structure further includes second positioning holes; the positioning pins being selectively placed in the first or second positioning holes to adjust the position of the mounting plate relative to the receiving surface. Thus, the invention allows the structure to be assembled in several configurations from the same components.

[0039] According to another aspect, the invention provides a motor vehicle structure, the structure comprising: a support with a receiving surface having first positioning holes; an anchoring bracket comprising a fixing plate with a contact surface against the receiving surface; an anchoring bracket projecting from the fixing plate and intended to be anchored to a rear seat back of a motor vehicle; positioning pins in the first positioning holes for positioning the fixing plate relative to the support in a first position; notable in that the receiving surface further has second positioning holes; the second positioning holes being adapted to receive the positioning pins for positioning the fixing plate in a second position. Thus, the invention makes it possible to assemble the structure in several configurations from the same components.

[0040] According to another aspect, the invention proposes a motor vehicle comprising a structure; the motor vehicle includes a rear seat with a backrest pivotally connected to the structure, the backrest including a locking system to an anchor latch; remarkable in that the structure conforms to the invention.

[0041] Preferably, the first positioning holes are front holes and the second positioning holes are rear holes.

[0042] Each feature introduced by the expression "preferably" given in relation to one aspect of the invention applies to all other aspects of the invention.

[0043] The invention will be well understood and other aspects and advantages will become clear upon reading the following description, given with reference to the attached figures listed below.

[0044] Figure 1 is a side view of a motor vehicle according to the invention.

[0045] Figure 2 shows from the inside a portion of the structure of a motor vehicle according to the invention.

[0046] Figure 3 represents a motor vehicle structure according to a first embodiment of the invention.

[0047] Figure 4 represents a motor vehicle structure according to a second embodiment of the invention.

[0048] Figure 5 is a cross-section of a portion of the structure of a motor vehicle according to the invention.

[0049] In the following description, the term "include" is synonymous with "include" and is not restrictive in that it permits the presence of other elements in the motor vehicle to which it relates. It is understood that the term "include" includes the terms "consist of." The terms "external" and "internal" will refer, respectively, to what is directed outward and inward toward the vehicle.

[0050] In this description, the terms "longitudinal," "longitudinally," "transverse," and "transversely" are used in relation to the vehicle's frame of reference and mounting configuration. "Longitudinal" refers to the vehicle's principal direction of travel. "Transverse" refers to a direction perpendicular to the vehicle's principal direction of travel. "Front" refers to the vehicle's principal direction of travel. "Rear" refers to the opposite of the front of the vehicle.

[0051] The X-axis represents the longitudinal direction, the Y-axis represents the transverse direction, and the Z-axis represents the vertical direction of the motor vehicle. These three axes define a right-handed trihedron whose orientation is preserved across the figures.

[0052] In this description, the ranges of values ​​include the bounds that delimit them.

[0053] In this description, the terms "vertical" and "horizontal" are not to be understood in their strict sense. Indeed, they allow an inclination of at most 20°, preferably at most 10°, more preferably at most 5°, and even more preferably at most 2°; compared to the strict meaning of these terms.

[0054] In this description, the technical characteristics are defined in the assembly configuration of the structure, unless otherwise explicitly stated.

[0055] Throughout the description, the different figures use the same reference signs to designate identical or similar entities.

[0056] Figure 1 represents a motor vehicle 10, according to an embodiment of the invention. The motor vehicle 10 comprises energy storage means and at least one motor (not shown) adapted to drive said motor vehicle 10.

[0057] The motor vehicle 10 comprises a structure 12. The structure 12 forms an outer body, or the main frame of the motor vehicle. The structure 12 delineates various compartments of the motor vehicle 10, including the passenger compartment 14, the cargo area 16, and the engine compartment (not shown). The cargo area 16 forms a compartment rear. The passenger compartment 14 forms a central compartment.

[0058] Structure 12 connects various parts of the motor vehicle 10, including the openings. It provides lateral openings 18 in which the openings are arranged. Structure 12 forms a mounting support for the powertrain, suspension systems, steering system, and braking systems.

[0059] The motor vehicle 10 comprises front seats and at least one rear seat 20, for example, two or three rear seats 20. The seats define seating positions. The rear seats 20 can be grouped into a bench seat extending through the passenger compartment 14. Each rear seat 20 has a horizontal seat cushion and a backrest; in this case, a rear backrest 22 extending from the seat cushion. The rear backrest 22 is pivotally connected to the structure 12. It is thus movable between a lowered position and an upright position; which are respectively horizontal and vertical. Each rear backrest 22 includes a locking system 24 with an anchoring latch supported by the structure. The locking system 24 includes a movable bolt capable of anchoring and releasing the rear backrest 22.

[0060] The motor vehicle can, for example, be a private motor vehicle or a commercial motor vehicle.

[0061] According to one embodiment, the motor vehicle comprises three transverse rows of seats.

[0062] Figure 2 shows a structural portion 12 of a motor vehicle, according to an embodiment of the invention. The motor vehicle may correspond to the one shown in relation to Figure 1. This portion is a right-hand side. The rear seat back is not shown for clarity.

[0063] The structure 12 can be formed from an assembly of stamped and welded sheet metal. The structural part 12 has an internal side wall 26; for example, forming a rear pillar.

[0064] The structure 12 includes a support 28 with a receiving surface 30. The structure 12 includes an internal wall formed by the support 28. The receiving surface 30 is generally perpendicular to the transverse direction. The receiving surface 30 is generally flat. It is intended to receive an anchor strike plate (not shown). It partially forms an adjustment interface.

[0065] The structure 12 includes first positioning holes 34. These first positioning holes 34 are arranged at the adjustment interface. The structure 12 also has second positioning holes 36. These second positioning holes 36 are located at a distance from the first adjustment holes; for example, longitudinally. Both the first positioning holes 34 and the second positioning holes 36 pass through the sheet metal forming the support 28. They also pass through the receiving surface 30.

[0066] The second set of positioning holes 36 is identical to the first set of positioning holes 34. The first set of positioning holes 34 forms a first set of holes. The second set of positioning holes 36 forms a second set of holes with the same number of holes as the first set. The holes in the sets of holes have the same arrangement and the same orientation.

[0067] The second positioning holes 36 result from a translation of the first positioning holes 34. The second positioning holes 36 are offset longitudinally relative to the first positioning holes 34. The second positioning holes 36 and the first positioning holes 34 are offset by a distance 38 of between 15 mm and 50 mm. The distance 38 is preferably between 20 mm and 40 mm.

[0068] The first positioning holes 34 and the second positioning holes 36 define a polygon 40. These positioning holes mark the angles of the polygon 40. The holes are inside the polygon 40. According to one embodiment, the polygon 40 is a quadrilateral, for example a parallelogram.

[0069] The first positioning ports 34 and the second positioning ports 36 each comprise an upper port 70 and a lower port 72. The lower ports 72 are larger than the upper ports 70. The lower ports 72 are more elongated than the upper ports 70. Each lower port 72 comprises a larger area than each upper port 70.

[0070] In the present embodiment, each set of holes comprises two positioning holes. According to an alternative of the invention, the first set of positioning holes comprises three positioning holes. The polygon forms a hexagon.

[0071] According to an alternative of the invention, the receiving surface is horizontal.

[0072] According to an alternative of the invention, the receiving surface is perpendicular to the longitudinal direction.

[0073] According to one embodiment of the invention, the interface has third positioning holes at a distance from the first and second, said third positioning holes being able to receive the positioning pins in order to position the anchor strike in a third position.

[0074] Figure 3 shows an interior area of ​​the structure 12 of a motor vehicle, according to an embodiment of the invention. The motor vehicle may correspond to that shown in relation to one of Figures 1 to 2. The support 28 is covered by an anchor plate 42. A lateral opening 18 is shown in front of the pillar to which the support 28 is fixed.

[0075] Structure 12 includes: a support 28 with a receiving surface 30 The anchoring strike plate 42. The latter comprises a fixing plate 44 with a contact surface against the receiving surface 30, and an anchoring bracket 46 in front of the fixing plate 44. The anchoring bracket 46 is the part intended to be anchored to the rear backrest. The anchoring bracket 46 forms a loop. It forms a loop or a hook.

[0076] The structure 12 has an adjustment interface 48 for the position of the anchor strike plate 42. The adjustment interface 48 is interposed between the support 28 and the anchor strike plate 42. It is located between the receiving surface 30 and the contact surface, also called the fixing surface. At the adjustment interface 48, the structure 12 includes first positioning holes 34, second positioning holes 36, and positioning pins 50 in the first positioning holes 34. The first positioning holes 34 and the second positioning holes 36, via their contours or centers, define a polygon 40.

[0077] The positioning pins 50 are at a distance from the second positioning holes 36. The latter remain empty. The second positioning holes 36 are free of positioning pins. The positioning pins 50 are offset vertically and longitudinally from each other.

[0078] The adjustment interface 48 includes fastening means. It has at least one weld, such as an electrical weld point, securing the mounting plate 44 to the support 28. This at least one weld comprises a first weld point 52 within the polygon 40; a second weld point 54; and a third weld point 56. The latter two are outside the polygon 40. The polygon 40 is vertically positioned between the second weld point 54 and the third weld point 56. This arrangement of the fastening means allows for the distribution of forces.

[0079] The positioning pins 50 include at least one oblong positioning pin 58. The oblong positioning pin 58 contributes to the orientation adjustment of the fixing plate 44. It improves the temporary hold before final fixing.

[0080] The positioning pins 50 include recesses. This feature reduces mass. Each recess passes through the corresponding positioning pin 50. The positioning pins 50 comprise an upper positioning pin 60 and a lower positioning pin 62.

[0081] The anchor bracket 46 includes a rod 64 attached to the mounting plate 44. The rod 64 is bent. It forms a hook. The rod 64 is vertical at the upper positioning pin 60. The rod 64 is welded to the mounting plate 44. The rod is also longitudinal at the lower positioning pin 62. This arrangement optimizes the forces, particularly the mechanical torques, transmitted by the rod to the mounting plate 44. The latter forms a mounting base.

[0082] The mounting plate 44 includes a contour line 66. The contour line 66 delimits the mounting plate 44. The second positioning holes include a rear hole 68 cut by the contour line 66. Said rear hole 68 cut is a lower hole.

[0083] In this embodiment, the first positioning holes are front holes and the second positioning holes are rear holes. Thus, the anchor strike plate 42 is in a first configuration relative to the support 28. It is in a first position, such as a first longitudinal position.

[0084] According to an alternative embodiment of the invention, the position adjustment interface is an angular position adjustment interface. The first positioning holes are pivoted relative to the second positioning holes. The first set of positioning holes and the second set of positioning holes may intersect.

[0085] Figure 4 shows an interior area of ​​structure 12 of a motor vehicle, according to another embodiment of the invention. The motor vehicle may correspond to the one shown in relation to any one of Figures 1 to 3.

[0086] This embodiment uses the same entities as the first embodiment; it differs in that these entities are positioned differently. The anchor strike plate 42 is in a second configuration, such as a second position relative to the support 28. The fixing plate 44 is set back on the receiving surface 30 relative to the first position. The second position is at a distance from the first position. They are at a distance longitudinally, and / or vertically, and / or transversely.

[0087] According to this embodiment, the positioning pins 50 are inserted into the second positioning holes 36 to ensure the positioning of the anchor strike plate 42 on the support 28. The first positioning holes 34 remain empty. They are free of positioning pins.

[0088] The second positioning holes 36 have contours with shapes complementary to the positioning pins. They have contours identical to the first positioning holes 34. Thus, the retention of the positioning pins 50 is identical between the first positioning holes 34 and the second positioning holes 36.

[0089] Therefore, the positioning pins 50 are selectively in the first positioning holes 34 or in the second positioning holes 36; in order to adjust the position of the fixing plate relative to the receiving surface.

[0090] The lower orifices 72 include a front orifice 74 crossed by the contour line 66, a rear orifice 68 surrounded by the contour line 66. Each second positioning orifice is surrounded by the contour line 66. Thus, the size of the mounting plate 44 is adjusted to the offset between the holes; and therefore to the adjustment range.

[0091] According to an alternative of the invention, the first positioning holes are adjacent to the second positioning holes.

[0092] According to an alternative or option of the invention, the second positioning holes are offset vertically with respect to the first positioning holes.

[0093] The characteristics described in relation to the second embodiment also apply to the first embodiment; unless the contrary is explicitly defined.

[0094] Figure 5 shows a cross-section of an adjustment interface 48 of a structure 12 of a motor vehicle, according to an embodiment of the invention. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 4. The support 28 is partially shown. The cross-section passes through the first positioning holes 34 and the positioning pins 50 housed therein. The positioning pins 50 pass through the support 28.

[0095] The receiving surface 30 is an external surface. It receives the mounting plate 44 of the anchor strike 42. A contact surface 76 of the mounting plate 44 is against the receiving surface 30. They fit together locally and are spaced apart between the positioning pins 50. The adjustment interface 48 extends between the receiving surface 30 and the contact surface 76. It is formed by these surfaces. The adjustment interface 48 is discontinuous. It extends beyond the contact surface 76. The adjustment interface 48 is traversed by the positioning pins 50. It is open via the first positioning holes 34 and the second positioning holes (not shown). Fastening means, such as the weld points 32, also pass through the adjustment interface 48.

[0096] The positioning pins 50 include an upper positioning pin 60 and a lower positioning pin 62. The positioning pins 50 have recesses 78. They are metallic. The positioning pins 50 can be tubes, for example, a split elastic tube. Thanks to the recess, the mass is reduced. Furthermore, the recess adds elasticity, which facilitates assembly before welding, for example.

[0097] The support 28 is an external transverse support. The contact surface 76 is an internal transverse surface. The adjustment interface 48 is vertical. The adjustment interface 48 is a transverse interface. It is transverse between the support 28 and the mounting plate 44.

[0098] The 50 positioning pins are vertically offset from each other. The 50 positioning pins extend laterally. They are parallel. The first positioning holes 34 include internal contours fitted to the positioning pins 50.

[0099] The first positioning holes 34, like the second positioning holes, include an upper hole 70 and a lower hole 72 that is larger than the upper hole 70. The support 28 comprises an upper portion 80 with the upper holes 70, and a lower portion 82 with the lower holes 72. The lower portion 82 is transversely angled inwards relative to the upper portion 80. This feature improves the stability of the mounting plate 44.

[0100] The support 28 comprises a first thickness 84, and the mounting plate 44 comprises a second thickness 86 that is thicker than the first thickness 86. It is at least 10% thicker; preferably at least 50% thicker. This optimizes mass and rigidity. The first and second positioning holes 34 are formed on the support 28, and the positioning pins 50 are fixed to the mounting plate 44.

[0101] According to an alternative of the invention, the first positioning holes and the second positioning holes are formed on the mounting plate; the positioning pins being fixed to the support.

[0102] According to an alternative of the invention, the fastening means include adhesive.

[0103] According to an alternative or option of the invention, the positioning pins include the fixing means; such as screws.

[0104] The invention comprises a combination of all the embodiments illustrated by all the figures.

[0105] Figures 2 to 4 are isometric views. Each one respects a specific scale, real angles and real proportions.

Claims

Demands

1. Motor vehicle (10) structure (12), the structure (12) comprising: a support (28) with a receiving surface (30); an anchoring strike plate (42) comprising a fixing plate (44) with a contact surface (76) against the receiving surface (30), an anchoring bracket (46) projecting on the fixing plate (44) and intended to be anchored to a rear backrest (22) of a motor vehicle (10); the receiving surface (30) and the contact surface (76) forming a position adjustment interface (48); at the adjustment interface (48), the structure (12) comprises first positioning holes (34), positioning pins (50) in the first positioning holes (34), in order to position the fixing plate (44) relative to the support (28) in a first position;characterized in that at the adjustment interface (48), the structure (12) further comprises second positioning holes (36) at a distance from the positioning pins (50); the second positioning holes (36) being suitable for receiving the positioning pins (50) in order to position the fixing plate (44) in a second position.

2. Structure (12) according to claim 1, characterized in that the positioning pins (50) comprise at least one oblong positioning pin (58).

3. Structure (12) according to any one of claims 1 to 2, characterized in that the positioning pins (50) comprise recesses (78); preferably, the second positioning holes (36) are identical to the first positioning holes (34).

4. Structure (12) according to any one of claims 1 to 3, characterized in that the positioning pins (50) comprise an upper positioning pin (60) and a lower positioning pin (62).

5. Structure (12) according to claim 4, characterized in that the anchoring bracket (46) comprises a rod (64) fixed to the fixing plate (44), the rod (64) is vertically at the level of the upper positioning pin (60) and / or longitudinally at the level of the lower positioning pin (62).

6. Structure (12) according to any one of claims 4 to 5, characterized in that the first positioning holes (34) and the second positioning holes (36) each comprise an upper hole (70) and a lower hole (72) larger than the hole upper (70); preferably, the support (28) comprises an upper portion (80) with the upper orifices (70), a lower portion (82) with the lower orifices (72); the lower portion (82) being transversely inwards with respect to the upper portion (80).

7. Structure (12) according to any one of claims 1 to 6, characterized in that the support (28) comprises a first thickness (84), the fixing plate (44) comprises a second thickness (86) greater than the first thickness (84); preferably, the first positioning holes (34) and the second positioning holes (36) are formed on the support (28), and the positioning pins (50) are fixed to the fixing plate (44).

8. Structure (12) according to any one of claims 1 to 7, characterized in that the second positioning holes (36) are offset longitudinally with respect to the first positioning holes (34); preferably, the second positioning holes (36) and the first positioning holes (34) are offset by a distance (38) of between 15 mm and 50 mm.

9. Structure (12) according to any one of claims 1 to 8, characterized in that the first positioning holes (34) and the second positioning holes (36) define a polygon (40); the structure (12) further comprises a first weld point (52) in said polygon (40); and / or the structure (12) comprises a second weld point (54), a third weld point (56) which are outside the polygon (40).

10. Motor vehicle (10) comprising a structure (12); the motor vehicle (10) comprises a rear seat (20) with a rear backrest (22) pivotally connected to the structure (12), the rear backrest (22) comprising a locking system (24) to an anchor latch (42); characterized in that the structure (12) conforms to any one of claims 1 to 9; preferably, the first positioning holes (34) are front holes and the second positioning holes (36) are rear holes.

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