Anchoring device for motor vehicle seat and motor vehicle seat

Abstract

The invention relates to an anchoring device (100) for a motor vehicle seat, the anchoring device comprising at least one metal rod (110) on which it is provided that one end of a fixing bar (210) of a child seat is reversibly locked. According to the invention, the anchoring device comprises a stop (130) secured to the metal rod, the stop being located under a part (112) of the metal rod provided to receive the end of the fixing bar and being shaped to cooperate with a lower portion (211) of the fixing bar of the child seat. Figure for the abstract: Fig. 2

Description

Title of the invention: Anchoring device for motor vehicle seat and motor vehicle seat Technical field of the invention

[0001] The present invention relates generally to the field of motor vehicle seats.

[0002] It relates more particularly to a device for attaching a child seat to a motor vehicle seat. State of the art

[0003] For several years, the attachment of child seats, also called "car seats", to motor vehicle seats has generally been done by means of secure attachment systems which do not use seat belts. These attachment systems make it possible to meet the "Isofix" standard (ISO 13216 standard) and are often, by extension, themselves called "Isofix" systems. Such a system comprises an anchoring device which is part of the vehicle seat and a locking device which is part of the child seat.

[0004] On the one hand, the anchoring device mainly consists of metal rods, generally two rods provided on both sides of the base of the vehicle seat back, in recesses in the back.

[0005] On the other side, the locking device comprises fixing bars, generally metallic, each bar cooperating with one of the rods of the vehicle seat. These fixing bars typically extend from the base of the child seat. Each fixing bar is conventionally provided at its end with means for locking onto the rod.

[0006] These secure attachment systems, however, have the disadvantage of placing significant stress on the seat of the vehicle seat at its junction with the backrest, i.e. under the attachment bars, when the child seat is installed and occupied. These stresses can, in the long run, deform the seat of the vehicle seat.

[0007] Furthermore, to simplify the design and manufacture of the vehicle seat, it is preferable to place the metal rods of the anchoring device at a distance from the seat of the vehicle seat, i.e. relatively high in the backrest, which complicates the locking of the fixing bars on the latter since the fixing bars are located lower, at the base of the child seat. Presentation of the invention

[0008] In this context, the present invention provides an anchoring device for a motor vehicle seat, the anchoring device comprising at least one rod metal rod on which it is provided that one end of a child seat fixing bar can be reversibly locked, the anchoring device comprising a stop secured to the metal rod, the stop being located under a part of the metal rod intended to receive the end of the fixing bar and being shaped to cooperate with a lower portion of the child seat fixing bar.

[0009] Thus, thanks to the invention, the stop interacts with the underside of the fixing bar, that is to say with a lower portion thereof, which prevents the fixing bar from moving downwards, that is to say in the direction of the seat base of the vehicle seat.

[0010] Advantageously, this makes it possible, on the one hand, when the child seat is fixed to the vehicle seat (i.e. when the fixing bar is locked onto the rod), to provide an additional support point for the fixing bar (in addition to the rod). This additional support point formed by the stop thus blocks the rotation of the fixing bar around the rod in the direction of the seat. The child seat is therefore held in place at a height and thus places much less stress on the seat of the vehicle seat under the fixing bar.

[0011] On the other hand, this may possibly allow, during the fixing of the child seat to the vehicle seat, to guide the fixing bar. Indeed, the stop, if it is shaped to ensure this function, makes it possible to force the fixing bar to deflect upwards so as to find itself opposite the metal rod in order to be able to lock there. Thus, the metal rods of the anchoring device can be placed higher in the back of the vehicle seat, which facilitates the design and manufacture of the vehicle seat.

[0012] Other advantageous and non-limiting characteristics of the anchoring device according to the invention, taken individually or in all technically possible combinations, are the following: - the stop is shaped to retain the fixing bar away from the vehicle seat when the fixing bar is locked onto the metal rod; - the stop is elastically deformable; - the stop is shaped to guide the fixing bar in sliding towards the metal rod; - the stop is directly fixed to at least one of the metal rod and a structural part of the vehicle to which the metal rod is fixed; - the stop is metallic and welded to at least one of the metal rod and the structural part; - the stop has a U shape with two legs connected to each other by a base, each of the legs being fixed to the metal rod; - the metal rod has a U shape with two branches connected to each other by said part intended to receive the end of the fixing bar, each leg of the stop being respectively fixed to one of the branches of the metal rod; - at least one of the branches of the metal rod extends rectilinearly in a main direction, and in which the tab of the stop which is fixed to said branch of the metal rod extends mainly in a plane substantially parallel to the main direction.

[0013] The invention also provides a motor vehicle seat comprising an anchoring device as described above for fixing a child seat.

[0014] Of course, the various features, variants and embodiments of the invention may be combined with each other in various combinations to the extent that they are not incompatible or mutually exclusive. Detailed description of the invention

[0015] The description which follows with reference to the appended drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be implemented.

[0016] In the attached drawings:

[0017] [Fig-1] is a schematic representation seen from the side of a vehicle seat automobile according to the invention on which a child seat is being installed,

[0018] [Fig.2] is a schematic representation in side perspective of a bar of child seat attachment attached to a vehicle seat anchoring device of [Fig.l], the anchoring device comprising a stop according to a first embodiment,

[0019] [Fig.3] is a schematic representation similar to that of [Fig.2] showing the fixing bracket for the metal rod of the anchoring device,

[0020] [Fig.4] is a schematic side view of a seat mounting bar child attached to an anchoring device, the anchoring device comprising a stop according to a second embodiment.

[0021] A vehicle seat 1 of a motor vehicle according to the invention is shown in [Fig.l]. Here, the term "vehicle seat" is understood to mean a front or rear seat of the motor vehicle on which it is intended that an occupant of the vehicle can sit. The vehicle seat 1 may be distant from the other seats of the vehicle, for example when it is the front passenger seat, or may be part of a bench seat grouping together several seats of the vehicle, for example when it is a rear seat.

[0022] In the description which follows, by convention, the term "lower" will designate the side or the part of an element oriented downwards, that is to say towards the chassis of the motor vehicle, when this element is in the position of use, while the The term "upper" will conversely designate the side or part of an element facing upwards. The terms "upper" and "lower" will thus be used with reference to the vertical direction, when the motor vehicle is placed by its wheels on a horizontal road.

[0023] As shown in [Fig.l], the vehicle seat 1 mainly comprises two parts: a generally horizontal seat 11, on which an occupant can sit, and a generally vertical backrest 12, on which said occupant can rest his back.

[0024] The vehicle seat 1 is equipped with an anchoring device 100 for fixing a child seat 2. Conventionally, the anchoring device 100 comprises two metal rods 110. They are respectively located on the two lateral sides of the vehicle seat 1 (the lateral direction being defined here as the left-right direction of the motor vehicle). The two metal rods 110 are similar here (they can also be identical) and only one of the metal rods 110 is described subsequently.

[0025] As shown in Figures 2 to 4, the metal rod 110 comprises two branches 111 connected to each other by a central part 112. The metal rod 110 thus has a U-shape. The two branches 111 rise here parallel to each other from bottom to top, while the central part 112 extends horizontally. The two branches 111 are secured, for example welded, to a structural part 120 of the motor vehicle 1. The structural part 120 is for example a metal tube passing laterally through the vehicle seat 1. The metal rod 110 is for example formed by folding a circular and rectilinear steel rod whose diameter is between 0.5 and 1 cm.

[0026] As shown in [Fig.l], the metal rod 110 is integrated into the vehicle seat 1 at the junction between the seat 11 and the backrest 12. The metal rod 110 is partially accessible, in particular the central part 112, from the outside of the vehicle seat 1. For this, the central part 112 here projects into a recess in the backrest 12 of the vehicle seat 1. Conventionally, this recess is here covered by a cover (not shown) comprising a movable wall, for example mounted in rotation, to open or close the recess. Alternatively, the recess could also be covered by a removable portion of the backrest.

[0027] The central part 112 is more specifically positioned at the bottom of the backrest 12 of the vehicle seat 1. Indeed, as appears subsequently, the central part 112 is intended to cooperate with a locking device 200 of the child seat 2 which is itself located close to the seat 11 of the vehicle seat 1.

[0028] Remarkably, the anchoring device 100 comprises, for each metal rod 110, a stop 130. The stop 130 is shaped to cooperate with the locking device 200 of the child seat 2. This means that the stop 130 is shaped to limit and / or constrain a movement of the locking device 200 of the child seat 2.

[0029] The stop 130 is here integral with the metal rod 110 in the sense that it is fixed, directly or indirectly, to the metal rod 110. For this, the stop 120 can be directly fixed only on the metal rod 110 ([Fig.2]), on the metal rod 110 and on the structural part 120 ([Fig.3]), or even only on the structural part 120. Alternatively, it can also be manufactured in one piece with the metal rod 110. In all cases, the stop 130 is fixed relative to the metal rod 110. It can of course deform slightly under the effect of the stresses exerted on it by the locking device 200 of the child seat 2.

[0030] The stop 130 is located under the central part 112 of the metal rod 110, that is to say downwards relative to the central part 112. The stop 130 is therefore located on the side of the seat 11 of the vehicle seat 1 relative to the central part 112.

[0031] The stop 130 is preferably metallic. Here, the stop 130 is a part attached to the metal rod 110. It is here made in one piece, which simplifies its manufacture. The stop 130 is for example made by cutting and stamping a metal sheet. It can also be made by molding.

[0032] As shown in Figures 2 to 4, the stop 130 more particularly comprises two tabs 131 connected by a base 132. The tabs 131 here delimit two portions folded back relative to the base 132. The two tabs 131 here extend parallel to each other. The two tabs 131 are here predominantly flat.

[0033] The tabs 131 ensure that the stop 130 is held in place relative to the metal rod 130. The tabs 131 are here welded to the branches 111 of the metal rod 110 and / or to the structural part 120. Preferably, as shown in [Fig. 3], the tabs 131 are welded to the metal rod 110 and to the structural part 120.

[0034] Each tab 131 is more specifically welded to a rectilinear portion 111A of each branch 111 of the metal rod 110. Each rectilinear portion 111A extends in a main direction DI. The flat portion of each tab 131 extends substantially parallel to this main direction DI, in the sense that the main direction DI forms an angle of less than 5 degrees with the flat portion of each tab 131. This arrangement makes the tabs 131, and therefore the stop 130, particularly resistant in the vertical direction, in particular to stresses from the top to the bottom. Here, each tab 131 is preferably also welded to the structural part 120, here at the level of an edge 131A of said tab 131, which further reinforces the stop 130 against stresses from the top to the bottom.

[0035] The base 132 comprises a lower portion 133 and an upper portion 134 located above the lower portion 133. Here, as shown in Figures 2 to 4, the upper portion 134 rises above the legs 131 in the direction of the central part 112 of the metal rod 110. The lower portion 133 is located between the legs 131.

[0036] In a first embodiment of the stop 130, shown in Figures 1 to 3, the lower portion 133 of the base 132 is inclined towards the seat 11 of the vehicle seat 1, which means that the further an area of ​​the lower portion 133 is from the upper portion 134, the closer said area is to the seat 11 of the vehicle seat 1. In other words, the further said area of ​​the lower portion 133 is from the upper portion 134, the closer it is to the front of the vehicle seat 1, and therefore to the front of the vehicle.

[0037] In this first embodiment, the upper portion 134 of the base 132 corresponds to one end of the base 132 which is folded towards the tabs 131.

[0038] As clearly shown in Figures 2 and 3, the lower portion 133 of the base is here flat. The stop 130, as a whole, thus has a flattened and folded shape.

[0039] In a second embodiment of the stop 130, shown in [Fig. 4], the lower portion 133 of the base 132 is inclined opposite the seat 11 of the vehicle seat 1. Thus, the further an area of ​​the lower portion 133 is from the upper portion 134, the closer it is to the rear of the vehicle seat 1, and therefore to the rear of the vehicle.

[0040] This second embodiment differs from the first embodiment only by the shape of the base 132. As will appear below, in this second embodiment, the stop 130 is therefore not shaped to provide a guiding function for the child seat 2 during its installation but only to provide a retaining function.

[0041] In the example of [Fig.4], the upper portion 134 of the base 132 forms a cylindrical tube (a section of which is visible in [Fig.4]).

[0042] The locking device 200 of the child seat 2 is designed to fix the child seat 2 on the vehicle seat 1. The locking device 200 of the child seat 2 is more specifically designed to fix reversibly on the metal rods 110 of the anchoring device 100.

[0043] The locking device 200 is positioned at a base 21 of the child seat 2. The base 21 of the child seat 2 is designed to rest on the seat 11 of the vehicle seat ([Fig.l]). The base 21 of the child seat 2 thus delimits the underside of the child seat 2. It can be integral with the rest of the child seat 2, as in [Fig.l], or independent, with the rest of the child seat 2 which can be mounted reversibly on the base 21.

[0044] As shown in [Fig.l], the child seat 2 is of the booster type. The child seat 2 thus has a backrest 22 arranged against, or at a short distance as in [Fig.l], from the backrest 12 of the vehicle seat 1. The occupant of the child seat 2 sits then in the direction of travel. Of course, the child seat 2 can however be of another type, for example of the carrycot type, and can be oriented in the opposite direction of travel.

[0045] The locking device 200 comprises two fixing bars 210, only one of which is shown in the figures. Each fixing bar 210 is designed to cooperate with one of the metal rods 110 of the anchoring device 100. As for the metal rods 110, only one fixing bar 210 will be described subsequently.

[0046] The fixing bar 210 is connected, at one of its ends, to the base 21 of the child seat 2 by means of a rigid or articulated connection. At its other end, the fixing bar 210 comprises locking means 220. These locking means are adapted to hold the fixing bar 210 on the metal rod 110 of the anchoring device 100. For this, the locking means 220 here comprise two teeth 221A, 221B forming a fork 221 which is designed to receive in its hollow the metal rod 110, as shown in [Fig.2]. The locking means 220 also comprise a clasp 222, here housed in the upper tooth 221A, mounted in rotation between an open position in which it opens the fork 221 and a closed position in which it closes the fork 221.

[0047] The anchoring device 100 and the locking device 200 form a secure fixing system for the child seat 2 to the vehicle seat 1. Here, this fixing system is in particular compliant with the “Isofix” standard.

[0048] The installation of the child seat 2 on the vehicle seat 1 is now described. For this, the recess in the backrest 12 of the vehicle seat 1 is opened in order to make the central part 112 of the metal rod 110 accessible.

[0049] In order to fix the child seat 2 on the vehicle seat 1, the base 21 of the child seat 2 is first placed on the seat 11 of the vehicle seat 1. The fixing bar 210 of the locking device 200 then projects, from the base 21 of the child seat 2, towards the rear in the direction of the backrest 12 of the vehicle seat 1. This step of the installation is shown in [Fig.l].

[0050] The base 21 of the child seat 2 (and therefore here the entire child seat) is then slid against the seat 11 towards the backrest 12 of the vehicle seat 1 (i.e. from left to right in [Fig.l]) until the central part 112 of the metal rod 110 passes between the teeth 221A, 221B of the locking means 220 of the fixing bar 210. The clasp 222, which was in the open position, is then turned towards its closed position to surround the central part 112 of the metal rod 110.

[0051] Advantageously, in the first embodiment of the stop 130, the latter is shaped to guide the fixing bar 210 in sliding towards the central part 112 of the metal rod 110. In other words, the stop 130 forms a guide ramp for the fixing bar 210.

[0052] As shown in [Fig.l], a lower portion 211 of the fixing bar 210, that is to say a portion of the fixing bar 210 which is located opposite the seat 11 of the vehicle seat 1, comes to bear on the stop 130, which, due to the inclination of the base 132, guides the fixing bar 210 upwards when the latter is moved rearward. The stop 130 therefore causes the fixing bar 210 to rise when the child seat 2 is put in place.

[0053] Here, the lower portion 211 of the fixing bar 210 comprises in particular the lower tooth 221B which slides on the base 132 during the installation of the child seat 2. As shown in [Fig.l], when the child seat is put in place, the lower tooth 221B slides firstly on the lower portion 133 of the base 132 before sliding on the upper portion 134 of the base 132.

[0054] The base 132 therefore delimits an interaction surface 132A of the stop 130 with the fixing bar 210 of the locking device 200 of the child seat 2. The stop 130 comes into contact with the fixing bar 210, and more specifically with the lower portion 211 of the fixing bar 210, at the level of the interaction surface 132A. The interaction surface 132A of the base 132 is oriented towards the central part 112 of the metal rod 110. In the first embodiment, the interaction surface 132A extends over the lower portion 133 and upper portion 134 of the base 132 ([Fig.2]). In the second embodiment, the interaction surface 132A extends only over the upper portion 134 of the base 132 ([Fig.4]).

[0055] Thus, thanks to the stop 130 according to the first embodiment, the metal rod 110 of the anchoring device 100 can be placed higher in the backrest 12 of the vehicle seat 1 since the stop 130 makes it possible to raise the fixing bar 210 when the child seat 2 is put in place.

[0056] We will now describe the cooperation of the locking device 200 of the child seat 2 with the anchoring device 100 of the vehicle seat 1 in an “installed” configuration where the child seat 2 is secured to the vehicle seat 1. This configuration is shown in Figures 2 to 4.

[0057] As clearly shown in [Fig. 2], the locking means 220 are locked around the central part 112 of the metal rod 110. This means that the central part 112 of the metal rod 110 is located between the teeth 221A, 221B of the locking means 220 of the fixing bar 210 and that the clasp 222 is in its closed position, so as to block any withdrawal of the central part 112 of the metal rod 110.

[0058] This locking around the metal rod 110, however, leaves the fixing bar 210 relatively mobile, in particular in rotation in the direction of the seat 11 of the vehicle seat 1.

[0059] Advantageously, whatever the embodiment of the stop 130, it is shaped to retain the fixing bar 210 at a distance from the vehicle seat 1, and more specifically at a distance from the seat 11 of the vehicle seat 1.

[0060] For this, as shown in Figures 2 and 4, the upper portion 134 of the base 132 of the stop 130 is provided to be in contact with the lower portion 211 of the fixing bar 210. The upper portion 134 therefore comprises at least in part the interaction surface 132A. As shown in Figures 2 to 4, the upper portion 134 of the base 132 of the stop 130 is more specifically in contact with the fixing bar 210 at the level of the lower tooth 22IB.

[0061] Thus, the stop 130 blocks the rotation of the fixing bar 210 downwards. In other words, the stop 130 holds the fixing bar 210 upwards. The stop 130 therefore supports the child seat 2 which places much less stress on the seat 11 of the vehicle seat 1, which limits its deterioration. In [Fig.4], this support is shown diagrammatically by an upwardly pointing arrow which represents the force exerted by the stop 130 on the fixing bar 210.

[0062] Advantageously, the upper portion 134 of the base 132 of the stop 130 can be elastically deformable, as is the case in the first embodiment. The upper portion 134 can in fact fold back more or less in the direction of the tabs 131, by plastic deformation of the metal, which in particular makes it possible to absorb shocks in the event of an accident.

[0063] Thus, the stop 130 is remarkably shaped to cooperate with a lower portion 211 of the fixing bar 210, in the installed configuration and, possibly, during installation of the child seat 2.

[0064] The child seat 2 can of course be detached from the vehicle seat 1 by moving the clasp 222 from its closed position to its open position and by shifting the base 21 of the child seat 2 forward.

[0065] The present invention is in no way limited to the embodiments described and shown, but those skilled in the art will be able to provide any variant in accordance with the invention.

[0066] For example, the stop may be made of a sufficiently strong plastic material.

[0067] The stop may also extend slightly away from the fixing bar in the installed configuration. The stop is then, for example, in contact with the fixing bar only when the child seat is occupied.

[0068] The lower portion of the base may not be flat. In the first embodiment, the lower portion of the base may, for example, have the shape of a guide groove, which prevents the fixing bar from sliding laterally on the base. In the second embodiment, its shape is relatively free since the lower portion does not interact with the fixing bar.

Claims

Claims

1. Anchoring device (100) for a motor vehicle seat (1), the anchoring device (100) comprising at least one metal rod (110) on which it is provided that one end of a fixing bar (210) of a child seat can be reversibly locked, characterized in that the anchoring device comprises a stop (130) integral with the metal rod (110), the stop (130) being located under a part (112) of the metal rod (110) provided to receive the end of the fixing bar (210) and being shaped to cooperate with a lower portion (211) of the fixing bar (210) of the child seat (2).

2. An anchoring device (100) according to claim 1, wherein the stop (130) is shaped to retain the fixing bar (210) at a distance from the vehicle seat (1) when the fixing bar (210) is locked onto the metal rod (110).

3. Anchoring device (100) according to claim 1 or 2, wherein the stop (130) is elastically deformable.

4. Anchoring device (100) according to one of claims 1 to 3, in which the stop (130) is shaped to guide the fixing bar (210) in sliding towards the metal rod (110).

5. Anchoring device (100) according to one of claims 1 to 4, wherein the stop (130) is directly fixed to at least one of the metal rod (110) and a structural part (120) of the vehicle on which the metal rod (110) is fixed.

6. Anchoring device (100) according to claim 5, wherein the stop (130) is metallic and welded to said at least one of the metallic rod (110) and the structural part (120).

7. Anchoring device (100) according to one of claims 1 to 6, in which the stop (130) has a U shape with two legs (131) connected to each other by a base (132), each of the legs (131) being fixed to the metal rod (110).

8. Anchoring device (100) according to claim 7, wherein the metal rod (110) has a U shape with two branches (111) connected to each other by said part (112) intended to receive the end of the fixing bar (210), each leg (131) of the stop (130) being respectively fixed to one of the branches of the metal rod (110).

9. Anchoring device (100) according to claim 8, in which at least one of the branches of the metal rod (110) extends rectilinearly in a main direction (Dl), and in which the tab of the stop (130) which is fixed to said branch (111) of the metal rod (110) extends mainly in a plane substantially parallel to the main direction (Dl).

10. Motor vehicle seat (1) comprising an anchoring device (200) according to one of claims 1 to 9 for fixing a child seat (2).

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